Patent Publication Number: US-2021172668-A1

Title: Refrigerator

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application claims priority to Korean Patent Application No. 10-2019-0163005, filed on Dec. 9, 2019, Korean Patent Application No. 10-2019-0163006, filed on Dec. 9, 2019, Korean Patent Application No. 10-2019-0163007, filed on Dec. 9, 2019, Korean Patent Application No. 10-2019-0163008, filed on Dec. 9, 2019, Korean Patent Application No. 10-2019-0163009, filed on Dec. 9, 2019, Korean Patent Application No. 10-2019-0163010, filed on Dec. 9, 2019, Korean Patent Application No. 10-2019-0163011, filed on Dec. 9, 2019, Korean Patent Application No. 10-2019-0163015, filed on Dec. 9, 2019, Korean Patent Application No. 10-2019-0163016, filed on Dec. 9, 2019, and Korean Patent Application No. 10-2019-0163017, filed on Dec. 9, 2019, the entire contents of which are incorporated herein for all purposes by reference. 
     TECHNICAL FIELD 
     The present disclosure relates to a refrigerator having a refrigerating compartment and a freezing compartment, and having an ice making compartment in a refrigerating compartment door. 
     BACKGROUND 
     A refrigerator is an apparatus that can generate cool air using circulation of a refrigerant through a refrigeration cycle and keep storage objects in the generated cool air. The storage objects may include food or other types of storage items to be refrigerated or frozen. 
     The refrigerator may include one or a plurality of storage compartments that are separated to keep storage objects. The storage compartment may be a storage compartment that is opened and closed by a rotary door or may be a storage compartment that can be drawn in or out in a drawer type. 
     For example, the storage compartment may include a freezing compartment for keeping storage objects frozen and a refrigerating compartment for keeping storage objects refrigerated. In some cases, the refrigerator may include two or more freezing compartments or two or more refrigerating compartments. 
     In some cases, the refrigerator may include a grille panel assembly that separates a space in which articles are stored and a space in which a fan module is installed. 
     In some cases, one grille panel assembly may be provided for each storage compartment and circulate the cool air in the corresponding storage compartment. 
     For example, each grille panel assembly has a fan module, and cool air is supplied into a corresponding storage compartment or the cool air in a corresponding storage compartment is circulated by the blowing power of the fan module. 
     In some cases, the structure may not be suitable for supplying cool air to two or more storage compartments using one evaporator. For example, in some cases, where cool air is supplied to two or more storage compartments by one blowing fan, cool air may not be sufficiently supplied, and the entire channel structure may be complicated. 
     In some cases, one grille panel assembly is equipped with two blowing fans so that cool air can be separately supplied to two or more storage compartments. 
     In some cases, cool air may be supplied to only two storage compartments, or the same amount of cool air may be supplied to three or more storage compartments by one grille panel assembly. That is, the grille panel assembly in these cases does not selectively supply different amounts of cool air to three or more storage compartments. 
     In some cases, the vertical height of the grille panel assembly is increased and the entire structure is complicated. 
     Accordingly, a grille panel assembly having a plurality of fans or a plurality of channels may be difficult to apply to a storage compartment having a relatively small vertical height. 
     In some cases, where a grille panel assembly has a large vertical height and is disposed through two storage compartments, the storage space of each of the storage compartments may be decreased by the width of the grille panel assembly. 
     In some cases, where one grille panel assembly is positioned behind both of two storage compartments, work for maintenance may be performed behind the refrigerator. 
     In some cases, a plurality of fans is simply added to the structures regardless of the use of storage compartments or the lengths of channels. In these cases, cool air may not be sufficiently supplied to a relatively far storage compartment, and a large amount of air may not be supplied to a storage compartment. 
     In some cases, cool air may be insufficiently supplied up to an ice making compartment in a refrigerating compartment door due to a long distance to the ice making compartment. 
     In some cases, the number of components of a grille panel assembly may be increased to form different channels, which may lead to a deterioration of assembly convenience and an increase of the front-rear width. 
     In some cases, fans may be provided to supply cool air to storage compartments, respectively. The fans may be different types of fans (axial flow fans and cross flow fans) or have different sizes to perform their functions, which may lead to inconvenience in preparing various types of fans. In some cases, channel designs may change due to the characteristics of the types of the fans. 
     In some cases, the ice tray may be disposed in the freezing compartment and configured to make ice using only the cool air supplied to the freezing compartment, which may lead to poor ice making. 
     For instance, the ice tray in the freezing compartment may be influenced by temperature variation in the freezing compartment where cool air is not continuously sprayed to the ice tray to make ice in the freezing compartment. In some cases, only an outer surface of an ice piece may be frozen. 
     SUMMARY 
     The present disclosure describes a refrigerator including a single grille panel assembly having a freezing fan module and an ice making module that are disposed between a grille panel and a shroud. 
     The present disclosure also describes a refrigerator in which a portion of cool air supplied to an ice making compartment can also be supplied to a freezing compartment such that cool air may be sufficiently supplied to the freezing compartment, and backflow of cool air due to a pressure difference from the ice making compartment may be prevented or reduced. 
     The present disclosure further describes a refrigerator in which cool air can be sufficiently supplied into the freezing compartment in which the grille panel assembly is installed, and cool air can be sufficiently supplied up a relatively far ice making compartment. 
     The present disclosure further describes a refrigerator including fans that can be shared and standardized through designing to which the same kinds and sizes of fans are applied. 
     According to one aspect of the subject matter described in this application, a refrigerator includes a cabinet having a refrigerating compartment and a freezing compartment disposed below the refrigerating compartment, an ice making compartment disposed at a side of the refrigerating compartment, an evaporator disposed in the freezing compartment and configured to cool air, a shroud that is disposed at a front side of the evaporator and defines a first intake hole and a second intake hole spaced apart from each other, where the shroud includes a first fastening protrusion that protrudes forward from a front surface of the shroud and is disposed adjacent to the first intake hole, and a second fastening protrusion that protrudes forward from the front surface of the shroud and is disposed adjacent to the second intake hole, and a grille panel that is coupled to a front surface of the shroud and defines a first seat that is recessed in a direction away from the shroud and faces the first intake hole, a second seat that is recessed in the direction away from the shroud and faces the second intake hole, and a cool air discharge port configured to discharge the cool air into the freezing compartment. The refrigerator further includes a first cool air guide channel defined between the grille panel and the shroud and configured to guide cool air from the first intake hole to the cool air discharge port, a second cool air guide channel defined between the grille panel and the shroud and configured guide cool air from the second intake hole to the ice making compartment, a freezing fan module that is disposed between the first seat and the shroud, that is coupled to the first fastening protrusion, and that is configured to supply cool air to the first cool air guide channel, and an ice making fan module that is disposed between the second seat and the shroud, that is coupled to the second fastening protrusion, and that is configured to supply cool air to the second cool air guide channel. 
     Implementations according this aspect may include one or more of the following features. For example, the refrigerator can include a refrigerating compartment door that is configured to open and close at least a portion of the refrigerating compartment, where the refrigerating compartment door defines the ice making compartment. In some examples, the grille panel defines an opening at an upper portion of the first seat, and includes a flow guide stage that extends from an end of the upper portion of the first seat facing the second seat. The flow guide stage can have an inclined or rounded shape extending in a direction away from the second seat. 
     In some implementations, the cool air discharge port includes an upper cool air discharge port defined above a center of the grille panel, and a lower cool air discharge port defined below the upper cool air discharge port. In some implementations, the grille panel includes a partition rib that is disposed at a rear side of the grille panel and that separates the first cool air guide channel and the second cool air guide channel from each other. 
     In some implementations, the cool air discharge port extends across a portion of the first seat. In some implementations, the freezing fan module can be at least partially accommodated in the first seat and fixed to the shroud, and the ice making fan module can be at least partially accommodated in the second seat and fixed to the shroud. 
     In some implementations, the grille panel further defines an ice making outlet that is separate from the cool air discharge port and configured to supply a portion of cool air in the second cool air guide channel into the freezing compartment, and the refrigerator further includes an ice maker disposed at the ice making outlet in the freezing compartment. In some implementations, the second cool air guide channel has a plurality of regions separated by the first fastening protrusion and the second fastening protrusion, and at least one of the plurality of regions is configured to communicate with the first cool air guide channel. 
     According to another aspect, a refrigerator includes a cabinet having a refrigerating compartment and a freezing compartment disposed below the refrigerating compartment, an ice making compartment disposed at a side of the refrigerating compartment, an evaporator disposed in the freezing compartment and configured to cool air, a shroud that is disposed at a front side of the evaporator and defines a first intake hole and a second intake hole spaced apart from each other, a grille panel that is coupled to a front surface of the shroud and defines a cool air discharge port configured to discharge cool air into the freezing compartment, a first cool air guide channel defined between the grille panel and the shroud and configured guide cool air from the first intake hole to the cool air discharge port, a second cool air guide channel defined between the grille panel and the shroud and configured to guide cool air from the second intake hole to the ice making compartment, and a partition rib that is disposed between the first cool air guide channel and the second cool air guide channel. The partition rib defines a communicating channel configured to guide cool air from the second cool air guide channel to the first cool air guide channel. The refrigerator further includes a freezing fan module disposed between the grille panel and the shroud and configured to supply cool air to the first cool air guide channel, and an ice making fan module disposed between the grille panel and the shroud and configured to supply cool air to the second cool air guide channel. The communicating channel is positioned closer to the cool air discharge port than to the first intake hole. 
     Implementations according this aspect may include one or more of the following features. For example, the partition rib can include a first partition rib and a second partition rib that are disposed between the first cool air guide channel and the second cool air guide channel and that extend away from each other, and the communicating channel can be defined between end portions of the first partition rib and the second partition rib that are spaced apart from and face each other. In some examples, the end portions of the first partition rib and the second partition rib extend parallel to each other, and the communicating channel is an air passage having a predetermined length. 
     In some implementations, the cool air discharge port includes an upper cool air discharge port defined above a center of the grille panel, and a lower cool air discharge port defined below the upper cool air discharge port. In some examples, the communicating channel includes a first communicating channel configured to guide cool air toward the upper cool air discharge port. In some examples, the communicating channel further includes a second communicating channel configured to guide cool air toward the lower cool air discharge port. In some implementations, the second communicating channel is positioned below the ice making fan module. 
     According to another aspect, a refrigerator includes a cabinet having a refrigerating compartment and a freezing compartment disposed below the refrigerating compartment, an ice making compartment disposed at a side of the refrigerating compartment, an evaporator disposed in the freezing compartment and configured to cool air, a shroud that is disposed at a front side of the evaporator and defines a first intake hole and a second intake hole spaced apart from each other, a grille panel that is coupled to a front surface of the shroud and defines a cool air discharge port configured to discharge cool air into the freezing compartment, a first cool air guide channel defined between the grille panel and the shroud and configured to guide cool air from the first intake hole to the cool air discharge port, a second cool air guide channel defined between the grille panel and the shroud and configured to guide cool air from the second intake hole to the ice making compartment, a partition rib that separates the first cool air guide channel and the second cool air guide channel from each other, a freezing fan module disposed between the grille panel and the shroud and configured to supply cool air to the first cool air guide channel, and an ice making fan module disposed between the grille panel and the shroud and configured to supply cool air to the second cool air guide channel. A diameter of the second intake hole is less than a diameter of the first intake hole. 
     Implementations according this aspect may include one or more of the following features. For example, the ice making fan module includes an ice making fan, and the freezing fan module includes a freezing fan, where a size and a shape of the ice making fan are identical to a size and a shape of the freezing fan, respectively. In some examples, the ice making fan is configured to rotate at a higher speed than the freezing fan. 
     In some implementations, the shroud includes a covering member that extends along an inner circumferential surface of the second intake hole such that the diameter of the second intake hole is less than the diameter of the first intake hole. 
     In some implementations, installation frames of the fan modules can be fastened and fixed to the shroud by a plurality of fastening protrusions. Accordingly, the fan modules may be stably installed and the flow direction of cool air may be mechanically controlled. 
     In some implementations, the second intake hole formed at the shroud may be formed to expose only a half or less of impellers of the ice making fan module. Accordingly, it may be possible to reduce a flow loss due to backflow of cool air supplied to the second cool air guide channel through the second intake hole. 
     In some implementations, the second intake hole may be formed such that the impellers of the ice making module are not exposed. Accordingly, cool air supplied o the second cool air guide channel may not flow backward through the second intake hole, whereby the cool air may have high pressure. 
     In some implementations, since the fan modules are disposed on the front of the shroud and seats are formed at the grille panel such that the fan modules can be partially accommodated, the grille panel assembly can be made slim. 
     In some implementations, since a portion of cool air supplied to the ice making compartment can be supplied to the freezing compartment, cool air can be sufficiently supplied to the freezing compartment. 
     In some implementations, since the second intake hole for the ice making fan module is formed smaller than the first intake hole, cool air can be sufficiently supplied to the ice making compartment at a far positions. 
     In some implementations, since the same two fan modules are used and are configured to obtain a large amount of air or a high blowing pressure, depending on the uses of the fan modules, fan modules can be shared. 
     In some implementations, since the communicating tube formed at the partition ribs includes the first communicating tube that guides cooling air to the upper cool air discharge port and a second communicating channel that guides cooling air to the lower cool air discharge port, cool air can be uniformly and sufficiently supplied to the entire freezing compartment. 
     In some implementations, since a portion of cooling air supplied to the ice making compartment is continuously sprayed to the ice maker in the freezing compartment through the ice making outlet, sufficient ice can be produced in the ice maker. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view showing an example of an external structure of an example refrigerator. 
         FIG. 2  is a perspective view schematically showing an example of an internal structure of the refrigerator. 
         FIG. 3  is a front cross-sectional view schematically showing the internal structure of the refrigerator. 
         FIG. 4  is a side cross-sectional view schematically showing the internal structure of the refrigerator. 
         FIG. 5  is an enlarged view of the part “A” of  FIG. 4 . 
         FIG. 6  is an enlarged view showing example parts of a structure that supplies or recovers cool air to or from an ice making compartment of the refrigerator. 
         FIG. 7  is an exploded perspective view showing an example of a grille panel assembly of the refrigerator. 
         FIG. 8  is a front view showing the grille panel of the refrigerator. 
         FIG. 9  is a rear view showing the grille panel of the refrigerator. 
         FIG. 10  is an enlarged view of the part “B” of  FIG. 9 . 
         FIGS. 11 and 12  are perspective views showing example parts including an example of an upper cool air discharge port of the refrigerator. 
         FIG. 13  is an enlarged view showing example parts and the upper cool air discharge port of the refrigerator. 
         FIG. 14  is a view showing examples of fan modules disposed in a grille panel of the refrigerator. 
         FIG. 15  is a view showing the fan modules and example evaporators respectively disposed behind the grille panels of the refrigerator. 
         FIG. 16  is a perspective view showing example parts including an ice making discharge port disposed at a second seat of the refrigerator. 
         FIG. 17  is a perspective view showing an example of the positional relationship between the ice making discharge port and an ice maker disposed in a freezing compartment of the refrigerator. 
         FIGS. 18 and 19  are views showing an example of a shroud in the refrigerator. 
         FIG. 20  is a view showing an example of the fan modules disposed in the shroud of the refrigerator. 
         FIG. 21  is an enlarged view of the part “C” of  FIG. 20 . 
         FIG. 22  is an enlarged view of the part “D” of  FIG. 20 . 
         FIG. 23  is a perspective view showing an example structure for transmitting cool air to an ice making compartment of the refrigerator. 
         FIG. 24  is a front view showing an example of a connection state of a switch compartment cool air duct and a switch compartment return duct in the refrigerator. 
         FIG. 25  is a rear view showing the connection state of the switch compartment cool air duct and the switch compartment return duct in the refrigerator. 
         FIG. 26  is a perspective view showing an example of a closed state of a switch damper assembly of the refrigerator. 
         FIG. 27  is a front view showing the closed state of the switch damper assembly of the refrigerator. 
         FIG. 28  is a plan view showing the closed state of the switch damper assembly of the refrigerator. 
         FIG. 29  is a cross-sectional view showing the closed state of the switch damper assembly of the refrigerator. 
         FIG. 30  is a bottom view showing the closed state of the switch damper assembly of the refrigerator. 
         FIG. 31  is a perspective view showing an example of an open state of the switch damper assembly of the refrigerator. 
         FIG. 32  is a front view showing the open state of the switch damper assembly of the refrigerator. 
         FIG. 33  is a plan view showing the open state of the switch damper assembly of the refrigerator. 
         FIG. 34  is a cross-sectional view showing the open state of the switch damper assembly of the refrigerator. 
         FIGS. 35 and 36  are cross-sectional views showing an example of the operation state when the switch damper assembly is seated in a first cool air guide channel in the refrigerator. 
         FIG. 37  is a front view showing an example of a fan module of the refrigerator. 
         FIG. 38  is a rear view showing the fan module of the refrigerator. 
         FIG. 39  is a flowchart showing an example of a control method in a freezing operation of the refrigerator. 
         FIG. 40  is a side cross-sectional view showing an example of flow of cool air in the freezing operation of the refrigerator. 
         FIG. 41  is an enlarged view of the part “E” of  FIG. 40 . 
         FIG. 42  is a state view showing an example of flow of cool air in a grille panel assembly in the freezing operation of the refrigerator. 
         FIG. 43  is an enlarged view of the part “F” of  FIG. 42 . 
         FIG. 44  is an enlarged view of main parts showing an example of a channel opening/closing module in the freezing operation of the refrigerator. 
         FIG. 45  is a reference view showing an example of flow of cool air in the freezing operation of the refrigerator. 
         FIG. 46  is a state view showing an example of flow of cool air in the grille panel assembly when a freezing operation and an ice making operation are simultaneously performed in the refrigerator. 
         FIG. 47  is an enlarged view of the part “G” of  FIG. 46 . 
         FIG. 48  is a reference view showing an example of flow of cool air when the freezing operation and the ice making operation are simultaneously performed in the refrigerator. 
         FIG. 49  is a reference view showing an example of flow of cool air discharge to an upper cool air discharge port when the freezing operation and the ice making operation are simultaneously performed in the refrigerator. 
         FIG. 50  is a reference view showing an example of flow of cool air discharge to a lower cool air discharge port when the freezing operation and the ice making operation are simultaneously performed in the refrigerator. 
         FIG. 51  is a reference view showing an example of flow of cool air when a separate lower cool air discharge port is further formed between two lower cool air discharge ports in the refrigerator. 
         FIG. 52  is a flowchart showing an example of a control method in the freezing operation of the refrigerator. 
         FIG. 53  is a side cross-sectional view showing an example of flow of cool air in the freezing operation for a switch compartment of the refrigerator. 
         FIG. 54  is an enlarged view of the part “H” of  FIG. 53 . 
         FIG. 55  is a state view showing an example of cool air flow in the grille panel assembly in the freezing operation for the switch compartment of the refrigerator. 
         FIG. 56  is a state view showing the channel opening/closing module in the freezing operation for the switch compartment of the refrigerator. 
         FIG. 57  is a side cross-sectional view showing an example of flow of cool air in the ice making operation for the switch compartment of the refrigerator. 
         FIG. 58  is an enlarged view of the part “I” of  FIG. 57 . 
         FIG. 59  is a state view showing an example of cool air flow in the grille panel assembly in the ice making operation of the refrigerator. 
         FIG. 60  is an enlarged view of the part “J” of  FIG. 59 . 
         FIG. 61  is a state view showing an example of flow of cool air supplied and returned to the ice making compartment in the ice making operation of the refrigerator. 
         FIG. 62  is a perspective view showing an example of a temperature sensor installed in an example refrigerator. 
         FIG. 63  is an enlarged view showing an example of the temperature sensor installed at the front of a grille panel. 
         FIG. 64  is an enlarged view showing an example of the temperature sensor installed at the rear of a grille panel. 
         FIG. 65  is a state view showing an example structure for thermal insulation of the temperature sensor. 
         FIG. 66  is an enlarged view of the part “K” of  FIG. 65 . 
         FIGS. 67 and 68  are state views showing examples of an upper cool air discharge port of an example refrigerator. 
         FIG. 69  is a reference view showing an example flow of cool air when cuts are formed at the upper air discharge port of the refrigerator. 
         FIG. 70  is a bottom view of an example of a grille panel assembly of an example refrigerator. 
         FIG. 71  is a front view showing an example of a suction guide of the refrigerator. 
         FIG. 72  is a rear view showing the suction guide of the refrigerator. 
         FIG. 73  is a flowchart showing an example of a control method in an ice making operation. 
     
    
    
     DETAILED DESCRIPTION 
     Hereafter, one or more implementations of a refrigerator are described with reference to  FIGS. 1 to 73 . 
       FIG. 1  is a perspective view showing an example of an external structure of a refrigerator according to a first implementation, and  FIG. 2  is a perspective view schematically showing an example of an internal structure of the refrigerator. 
       FIGS. 3 to 5  are views showing examples of the internal structure of the refrigerator. 
     As shown in these figures, a refrigerator according to a first implementation includes a cabinet  10  having a refrigerating compartment  11  and a freezing compartment  12 , and a refrigerating compartment door  20  having an ice making compartment  21 . 
     The refrigerating compartment  11  can be a storage compartment provided to keep articles refrigerated and the freezing compartment  12  may be a storage compartment provided to keep articles frozen. 
     The refrigerator can further include a switch compartment  13 . 
     The switch compartment  13  can be a storage compartment of which the use can be changed by a user. The switch compartment  13  can be configured to share an evaporator  31  with the freezing compartment  12 , so the switch compartment  13  can be used to keep articles not only refrigerated, but also frozen therein. 
     On the rear wall of the cabinet  10 , a first evaporator  31  may be disposed at the rear portion in the refrigerating compartment  11  and a second evaporator  32  may be disposed at the rear portion in the freezing compartment  12 . The first evaporator  31  may be an evaporator provided to supply cool air into the refrigerating compartment  11  and the second evaporator  32  may be an evaporator provided to supply cool air into the freezing compartment  12 , the switch compartment  13 , and the ice making compartment  21 . This configuration is shown in  FIGS. 4 and 5 . 
     The refrigerating compartment  11  may be positioned at the upper portion in the cabinet  10 , the freezing compartment  12  may be positioned at the lower portion in the cabinet  10 , and the switch compartment  13  may be positioned at the middle portion between the refrigerating compartment  11  and the freezing compartment  12  in the cabinet  10 . The storage compartments (e.g., refrigerating compartment  11 , freezing compartment  12 , and switch compartment  13 ) may be separated from each other by a plurality of partitions  14  that divides the cabinet  10  up and down. 
     The refrigerating compartment door  20 , which is a door for opening/closing the refrigerating compartment  11 , may be a rotary door. 
     In particular, the ice making compartment  21  may be disposed inside the refrigerating compartment door  20  (on the side that is positioned in the refrigerating compartment when the refrigerating compartment door is closed). The ice making compartment  21  may be a storage compartment in which an ice maker for making ice or an ice tray may be disposed on the refrigerating compartment door  20 . 
     The ice making compartment  21  may be configured to be supplied with cool air from an ice making compartment cool air duct  51  through a guide duct  22  and then to discharge cool air to an ice making compartment return duct  52 . This configuration is shown in  FIG. 6 . 
     A grille panel assembly  1  may be provided ahead of the second evaporator  32  in the cabinet  10  and another grille panel assembly  2  may be provided ahead of the first evaporator  31  in the cabinet  10 . In some examples, the grille panel assembly may be referred to as a grille plate assembly, grill plate assembly, grille pan assembly, grill pan assembly, grille fan assembly, or grill fan assembly. 
     The grille panel assemblies  1  and  2  may be formed equally or differently. 
     The switch compartment  13  may not be provided with a separate grille panel assembly and may be configured to be supplied with cool air from the grille panel assembly  1  positioned ahead of the second evaporator  32 . 
     That is, a machine room may be formed at the lower portion in the rear space in the freezing compartment  12 , so the vertical height of the rear space may be smaller than that of the front space in the freezing compartment  12 . 
     Accordingly, the grille panel assembly  1  may be provided in the rear space in the freezing compartment  12 . In some examples, a compressor and a condenser forming a refrigeration cycle may be disposed in the machine room  15 , whereby heat exchange may be possible through the first evaporator  31  and the second evaporator  32 . 
     As shown in  FIG. 7 , the grille panel assembly  1  provided in the freezing compartment  12  may include, among other things, a grille panel  100 , a shroud  200 , a first cool air guide channel  310 , a second cool air guide channel  320 , a freezing fan module  410 , an ice making fan module  420 , and partition ribs  510  and  520 . 
     The components of a first implementation of the grille panel assembly  1  are described hereafter in more detail. 
     The grille panel assembly  1  can include the grille panel  100 . 
     As shown in  FIGS. 4 and 5 , the grille panel  100  may be a part forming the front wall of the grille panel assembly  1 . 
     Cool air discharge ports  110 ,  120 , and  130  may be formed at the grille panel  100  (see  FIGS. 7 to 10 ). 
     The cool air discharge ports  110 ,  120 , and  130  may be openings for supplying cool air into the freezing compartment  12  and may be formed in the first cool air guide channel  310  to be described below. 
     The cool air discharge ports  110 ,  120 , and  130  may include an upper cool air discharge port  110  formed over the center of the grille panel  100  when the grille panel  100  is seen from the front (or the rear). 
     The upper cool air discharge port  110  can be a part allowing cool air forcibly blown by rotation of the freezing fan module  410  to the discharged to the space in which the upper wall is disposed in the freezing compartment  12 . 
     The upper cool air discharge port  110  can be positioned further over the center of the freezing fan module  410  of the parts in the first cool air guide channel  310 . Accordingly, cool air that is discharged to the cool air discharge port  110  may be discharged to the space in which the upper wall is disposed in the freezing compartment  12 . 
     The upper cool air discharge port  110  can be smaller in vertical height than the freezing fan module  410 , and can be larger in left-right width than the freezing fan module  410 . Accordingly, cool air flowing in the circumferential direction of the freezing fan module  410  by rotation of the freezing fan module  410  may be sufficiently discharged to the freezing compartment  12  through the upper cool air discharge port  110 . 
     The upper cool air discharge port  110  may include a hole and a tube protruding forward. 
     In some implementations, the upper cool air discharge port  110  may be a polygonal tube having a top wall  112  at the upper portion, a bottom wall  113  at the lower portion, and two side walls  114  at both sides. This configuration is shown in  FIGS. 11 and 12 . 
     That is, straightness may be given to the cool air passing through the tube-shaped upper cool air discharge port  110 . Accordingly, the cool air passing through the upper cool air discharge port  110  may be discharged straight directly forward without spreading up and down and may be supplied to the front in the freezing compartment  12 . 
     The bottom wall  113  of the upper cool air discharge port  110 , as shown in  FIG. 13 , may be gradually inclined up and down (or rounded) as it goes from the lower end in the protrusion direction (forward). That is, by the inclined structure, the cool air flowing in the circumferential direction of the freezing fan  411  may flow on the rear of the grille panel  100  to be smoothly guided to the bottom wall  113  of the upper cool air discharge port  110  and may keep flow on the bottom wall  113  to be smoothly discharged forward. 
     The inclination may be a straight inclination and may be a rounded inclination. The rounded inclination may further smoothly guide flow of the cool air. 
     In some examples, the top wall  112  of the upper cool air discharge port  110  may be inclined downward as it goes forward. 
     A plurality of grille ribs  111  may be formed in the upper cool air discharge port  110 . 
     The grille ribs  111  may be ribs that guide the discharge direction of the cool air that is discharged to the upper cool air discharge port  110 . 
     The grille ribs  111  may be spaced apart from each other and may be inclined forward or toward both sides. 
     The grille ribs  111  may be formed have different inclination angles, as in  FIG. 10 . 
     This may be for enabling cool air that is guided by the grille ribs  111  to be discharged in different directions. That is, this may be for enabling cool air to be uniformly supplied into the entire freezing compartment by supplying cool air in different directions. 
     In some examples, all grille ribs  111  may not need to be inclined in different directions. That is, some adjacent grille ribs  111  may be formed to have the same inclination angle. 
     For example, the grille ribs at both sides may be formed to have a large inclination angle in comparison to the grille ribs at the center of the upper cool air discharge port  110 . 
     That is, the cool air guided to the grille ribs  111  at the center may have straightness and may be discharged to a far position, and the cool air guided to the grille ribs  111  at both sides may be supplied up to the rear portions (adjacent to the grille panel assembly) of both side walls of the freezing compartment  12 . 
     Accordingly, although cool air is discharged to the upper cool air discharge port  110  that is smaller in left-right width than the inside of the freezing compartment  12 , cool air may be uniformly discharged into the entire freezing compartment  12 . 
     In some examples, the more the grille ribs  111  are positioned outside in the upper cool air discharge port  110 , the more the grille ribs  111  may be inclined outward such that cool air may be uniformly supplied to a wider space. 
     The cool air discharge ports  110 ,  120 , and  130  may include lower cool air discharge ports  120  and  130 . 
     The lower cool air discharge ports  120  and  130  may be openings provided to supply cool air to the middle space of the freezing compartment  12 . That is, considering that the upper cool air discharge port  110  is configured to supply cool air only to the top in the freezing compartment  12 , cool air may be relatively insufficiently supplied to the middle portion in comparison to the top. Accordingly, the lower cool air discharge ports  120  and  130  may be additionally provided such that cool air may be supplied to the middle portion in the freezing compartment  12 . 
     The lower cool air discharge ports  120  and  130  may be formed at both sides under the upper cool air discharge port  110  of the parts in the first cool air guide channel  310 . 
     In particular, the lower cool air discharge ports  120  and  130  may be formed at the lower portion in the first cool air guide channel  310  such that cool air may be discharged ahead of the grille panel  100  in the freezing compartment  12  while flowing along the bottom in the first cool air guide channel  310 . 
     That is, since the lower cool air discharge ports  120  and  130  may supply cool air into the freezing compartment  12  under the upper cool air discharge port  110 , cool air may be sufficiently supplied to the middle portion in the freezing compartment  12 . 
     The lower cool air discharge ports  120  and  130  may include a first lower cool air discharge port  120  formed at any one side (at the right side in figures when the grille panel is seen from the front) of the bottom in the first cool air guide channel  310  and a second lower cool air discharge port  130  formed at the other side (at the left side in figures when the grille panel is seen from the front). That is, cool air may be additionally supplied to the freezing compartment  12  while sequentially passing through the first lower cool air discharge port  120  and the second lower cool air discharge port  130  when flowing through the first cool air guide channel  310 . 
     The first lower cool air discharge port  120  and the second lower cool air discharge port  130  may be formed to be more open as they go to the center of the grille panel  100 . That is, considering that articles are stored much at the center than at both sides in the freezing compartment  12 , much cool air may be discharged to the center. 
     The upper cool air discharge port  110  may be larger than the sum of the sizes of the first lower cool air discharge port  120  and the second lower cool air discharge port  130  such that most of the cool air blown by the freezing fan module  410  is supplied into the freezing compartment  12  through the upper cool air discharge port  110 . 
     A plurality of grille ribs  121  and  131  may be formed in the two lower cool air discharge ports  120  and  130 . 
     The grille ribs  121  and  131  may have a structure giving directionality to the cool air that is discharged through the corresponding lower cool air discharge ports  120  and  130 . At least some of the grille ribs  121  and  131  may be inclined to be able to guide the cool air passing through them to the sides in the freezing compartment  12 . 
     The lower cool air discharge ports  120  and  130  may be holes and may be tubes protruding forward. 
     It may be exemplified in the first implementation that the lower cool air discharge ports  120  and  130  are tubes. That is, straightness may be given to the cool air passing through the tube-shaped lower cool air discharge ports  120  and  130 . Accordingly, the cool air passing through the lower cool air discharge ports  120  and  130  may be discharged straight directly forward without spreading up and down and may be supplied to the front in the freezing compartment  12 . 
     The grille panel  100  may have a suction guide  140 . 
     The suction guide  140  may guide return flow of cool air flowing through the freezing compartment  12 . 
     The suction guide  140 , as shown in  FIGS. 7 to 9 , may be formed at the lower end of the grille panel  100  such that cool air returning after circulating in the freezing compartment flows to the lower end of the second evaporator  32 . 
     The suction guide  140 , as shown in  FIGS. 5 and 7 , may be rounded or bended in the same shape as the bottom of the freezing compartment  12  and may cover a portion of the bottom of the freezing compartment  12 . 
     That is, cool air flowing on the bottom of the freezing compartment  12  may be guided by the suction guide  140 , whereby the cool air may smoothly flow to a cool air intake side (bottom) of the second evaporator  32 . 
     The grille panel  100  may have a temperature sensor  150   a.    
     The temperature sensor  150   a  may be a sensor that senses the temperature inside the freezing compartment  12 . 
     The temperature sensor  150   a,  as shown in  FIGS. 8 and 9 , may be disposed at any one of both ends of the grille panel  100 . 
     The grille panel  100  may have a first seat  160 . 
     The first seat  160  may be provided as a portion in which a portion of the freezing fan module  410  is accommodated. 
     As shown in  FIGS. 7 to 10 , the first seat  160  may be recessed on the rear of the grille panel  100 . In some examples, as shown in  FIGS. 11 and 12 , the portion where the first seat  160  is formed in the grille panel  100  may protrude forward as much as the recessed depth of the first seat  160 . 
     That is, the freezing fan  411  of the freezing fan module  410  seated in the first seat  160  may be maximally spaced apart from the second evaporator  32  disposed behind the grille panel assembly  1 . Accordingly, the influence on the freezing fan  411  by the second evaporator  32  (influence by surface temperature) may be maximally reduced. 
     The first seat  16  may be positioned at the upper end with respect to the center ion the basis of the height of the grille panel  100  and may be formed substantially at the center portion on the basis of the left-right length of the grille panel  100 . 
     The recessed depth of the first seat  160  may be determined in consideration of the distance between the freezing fan  411  of the freezing fan module  410  and the second evaporator  32 . That is, considering that condensate water may be produced on the freezing fan  411  when the freezing fan  411  is too close to the second evaporator  32 , the recessed depth of the first seat  160  may be determined such that the distance between the freezing fan  411  and the second evaporator  32  is at least 3 mm or more. 
     The upper cool air discharge port  110  may be formed across the upper end of the first seat  160 . 
     In particular, the open top of the first seat  160  may communicate with the bottom wall  113  of the upper cool air discharge port  110 . This structure may enable a portion of the freezing fan module  410  installed in the first seat  160  to be positioned inside the upper cool air discharge port  110 , whereby cool air flowing in the circumferential direction of the freezing fan  411  may be directly supplied to the upper cool air discharge port  110  and may be discharged to the open front of the upper cool air discharge port  110  when the freezing fan module  410  is operated. 
     In some cases, where an outlet for discharging cool air is positioned over a freezing fan module, cool air may not be directly discharged and hits against flow of cool air flowing around due to the distance between the freezing fan module and the outlet. Accordingly, cool air supplied to a storage compartment may not be sufficiently supplied up to the front in the storage compartment. 
     In some implementations, a portion of the freezing fan  411  of the freezing fan module  410  can be exposed to the upper cool air discharge port  110  such that cool air can be more smoothly discharged. Accordingly, cool air can be sufficiently supplied up to the front in the storage compartment (freezing compartment). 
     Further, as shown in  FIG. 14 , the upper end of the freezing fan module  410  exposed through the open top of the first seat  160  may be positioned at a height at which the upper end does not fully block the upper cool air discharge port  110  (a height that the upper wall of the upper cool air discharge port does not reach). 
     That is, sufficient discharging force may be applied when cool air flowing in the circumferential direction of the freezing fan module  410  passes through the upper cool air discharge port  110 , whereby the cool air may be smoothly supplied up to the front in the cabinet  10 . 
     If the freezing fan module  410  is positioned to fully block the upper cool air discharge port  110 , the flow speed of cool air may decrease, so there may be a possibility that cool air is not sufficiently supplied up to the front in the cabinet  10 . 
     Accordingly, due to the structure of the first seat  160  described above and the freezing fan module  410  seated in the first seat  160 , substantially half the cool air blown into the first cool air guide channel  310  may be discharged to the upper cool air discharge port  110  by the freezing fan module  410  and the other cool air may be discharged to the two lower cool air discharge ports  120  and  130  or the switch compartment  13  while flowing through the first cool air guide channel  310 . 
     A flow guide stage  161  may be formed at at least any one of both ends of the open top of the first seat  160 . The flow guide stage  161  can guide the cool air to rotate and discharge by operation of the freezing fan module  410  in the first seat  160 . The cool air can flow while laterally spreading. The flow guide stage  161  may protrude outward from the end of the first seat  160  and be inclined or rounded. For example, the flow guide stage  161  may be inclined or rounded with respect to a horizontal direction and connect to another flow guide stage  163 . 
     The grille panel  100  may have a second seat  170 . 
     The second seat  170  may be a part in which the ice making fan module  420  is seated. That is, the ice making fan module  420  may be embedded in the surface of the grille panel  100 , whereby freezing by the second evaporator  32  may be prevented. 
     The second seat  170  may be formed at a side of the first seat  160 . 
     That is, the freezing fan module  410  and the ice making fan module  420  may be disposed between the grille panel  100  and the shroud  200  due to the first seat  160  and the second seat  170 . 
     Even though the freezing fan module  410  and the ice making fan module  420  may be disposed between the grille panel  100  and the shroud  200  due to the first seat  160  and the second seat  170 , the front-rear thickness of the grille panel assembly  1  may be minimized. That is, the slim grille panel assembly  1  may be provided by the first seat  160  and the second seat  170 . 
     The first seat  160  and the second seat  170  may be positioned over the top of the second evaporator  32 . 
     That is, the freezing fan module  410  and the ice making fan module  420  seated in the first seat  160  and the second seat  170  may be positioned higher than the top of the second evaporator  32 , whereby malfunction (freezing) of the fan modules  410  and  420  that may be caused by the adjacent arrangement of the second evaporator  32  and the fan modules  410  and  420  may be prevented. 
     The top of the second evaporator  32  may be the uppermost portion of a refrigerant pipe  32   a  of the second evaporator or may be the upper end of a heat exchange fin  32   b  of the second evaporator  32 . 
     It may be exemplified in the first implementation that the top of the second evaporator  32  is the upper end of the heat exchange fin  32   b.  This configuration is shown in  FIG. 15 . Accordingly, freezing of the fan modules  410  and  420  due to the second evaporator  32  may be reduced. 
     In particular, the heat exchange fin  32   b  may not exist at the portion of the second evaporator  32  that is adjacent to the fan modules  410  and  420 , whereby freezing of the fan modules  410  and  420  may be reduced. 
     A heat blocking plate  33  (see  FIG. 5 ) may be disposed on the front of the second evaporator  32 , and the coldness at low temperature from the second evaporator  32  may be prevented from being transmitted to the shroud  200  by the heat blocking plate  33 . 
     The grille panel  100  may have an ice making outlet  171 . 
     The ice making outlet  171  may be an opening provided to supply cool air to the ice maker  12   a  disposed in the freezing compartment  12 . The ice maker  12   a  may be a common ice tray or may be a space in which the ice maker is disposed and ice is made. 
     If cool air is not directly sprayed to the ice maker  12   a  and ice is made in the ice maker provided in the freezing compartment  12  only based on the temperature in the freezing compartment  12 , poor ice making may be generated and a hollow may be formed without the inside frozen in ice, for instance. 
     In some implementations, the second cool air guide channel  320  can be a channel provided to supply cool air to the ice making compartment  21 , and the ice making fan  421  of the ice making fan module  420  provided in the second cool air guide channel  320  can be controlled to always operate regardless of whether a compressor is operated. 
     Considering this, a portion of the cool air continuously supplied to the ice making compartment  21  may be directly and continuously sprayed to the ice maker  12   a  through the ice making outlet  171 , whereby ice that is made in the ice maker  12   a  may be sufficiently frozen. 
     As shown in  FIG. 16 , the ice making outlet  171  may be formed at the second seat  170 . 
     As shown in  FIG. 17 , the ice making outlet  171  may be formed right behind the ice maker  12   a.    
     In particular, a discharge guide pipe  172  may extend to the ice making outlet  171 . That is, cool air may be intensively supplied to the ice maker  12   a  through the extending discharge guide pipe  172 . 
     The shroud  200  of the grille panel assembly  1  is described with reference to  FIGS. 4, 5 , and  18  to  25 . 
       FIG. 18  is a front view showing a shroud of the refrigerator according to an implementation and  FIG. 19  is a rear view showing the shroud of the refrigerator. 
     The shroud  200  may be coupled to the rear of the grille panel  100  and may provide a space such that a channel for flow of cool air may be formed between the shroud  200  and the grille panel  100 . 
     A first intake hole  210  and a second intake hole  220  may be formed through the shroud  200 . The two intake holes  210  and  220  may be openings formed such that the cool air exchanging heat through the second evaporator  32  positioned at the rear in the freezing compartment  12  may flow into the space between the grille panel  100  and the shroud  200 . 
     The first intake hole  210  may be formed substantially at the center of the shroud  200  and the second intake hole  220  may be formed at any one side of the first intake hole  210 . 
     The center of the first intake hole  210  may be positioned closer to the top than the bottom in the first cool air guide channel  310 . The upper cool air discharge port  110  may be positioned between the center of the first intake hole  210  and the top in the first cool air guide channel  310 . 
     A first bellmouth  211  may be formed around the first intake hole  210  and a second bellmouth  221  may be formed around the second intake hole  220 . 
     The first intake hole  210  may be designed in consideration of the amount of cool air that is supplied to the freezing compartment  12  through the freezing fan module  420 , and the second intake hole  220  may be designed in consideration of the pressure of the cool air that is supplied to the ice making compartment  13  through the ice making fan module  420 . 
     That is, the freezing fan module  410  may be configured to supply a large amount of cool air because it supplies cool air to the freezing compartment positioned ahead of it, and the ice making fan module  420  may be configured to supply cool air up to a long distance because it supplies cool air to the ice making compartment  21  disposed in the refrigerating compartment door  20 . 
     To this end, the first intake hole  210  may be formed larger than the second intake hole  220  such that forcible sending force may be small but a large amount of cool air may be discharged, and the second intake hole  220  may be formed smaller than the first intake hole  210  to obtain high forcible sensing force such that a small amount of cool air may be discharged but cool air may be supplied up to the ice making compartment  21 . 
     In detail, the first intake hole  210  may have an inner diameter such that impellers  411   c  of the freezing fan  411  of the freezing fan module  420  may be exposed substantially half or more. That is, cool air that has passed through the first intake hole  210  may be supplied between the impellers  411   c  and then may be guided to be directly radially discharged by the impellers  411   c.    
     The first intake hole  210  may have an inner diameter such that most of the impellers  411   c  of the freezing fan  411  may be exposed. This configuration is shown in  FIG. 21 . 
     The second intake hole  220  should be formed such that the impellers  411   c  of the freezing fan  411  are not maximally exposed. 
     That is, the more the impellers  411   c  of the freezing fan  411  may be exposed through the second intake hole  220 , the more the cool air may flow backward through the second intake hole  220  while is it discharged in the rotational direction of the ice making fan  421 . Accordingly, the backflow through the second intake hole  220  and the flow going into the second intake hole  220  through the second evaporator  32  may hit against each other, whereby the force sending cool air to the second cool air guide channel  320  relatively decreases. 
     The second intake hole  220  may be formed to have size such that the impellers  421   c  may be exposed half or less, whereby forcible sending force may be increased. This configuration is shown in  FIG. 22 . 
     The second intake hole  220  may be formed to have a size such that the impellers  421   c  may not be exposed. That is, most parts of the open portions between the impellers  421   c  may be blocked, whereby backflow of cool air may be fundamentally prevented. 
     The two intake holes  210  and  220  can have different sizes. For example, the diameters of the intake holes  210  and  220  may be different from each other. In some examples, a difference may be given to the diameters by blocking a portion of the inner side of the second intake hole  220 . 
     For instance, a covering member  222  can be disposed at the inner surface of the second intake hole  220 . That is, the second intake hole  220  may have a smaller diameter than the first intake hole  210  and may cover the impellers  421   c  of the ice making fan  421  by the covering member  222 . 
     The covering member  222  may have an inner diameter such that the impellers  421   c  of the ice making fan  421  of the ice making fan module  420  may be maximally covered. That is, most parts of the open portions between the impellers  421   c  may be blocked, whereby backflow of cool air may be fundamentally prevented. Accordingly, the cool air flowing in the second cool air guide channel  320  after passing through the second intake hole  220  may be smoothly forcibly sent to the ice making compartment without being discharged backward through the second intake hole  220 . 
     The shroud  200  may be configured not to block the suction guide  140  of the grille panel  100  when the shroud  200  and the grille panel  100  are combined. 
     That is, the shroud  200  may be configured to block only a portion of the rear of the grille panel  100 . Accordingly, the grille panel assembly  1  may be made compact and cool air may smooth flow. Further, the cool air guided to return by the suction guide  140  may smoothly flow to the lower end of the second evaporator  32 . 
     The shroud  200  may have a size that may surround the upper portion of the grille panel  100 , the upper cool air discharge port  110 , and the two lower cool air discharge ports  120  and  130 . 
     The grille panel  100  and the shroud  200  may have tops  101  and  201 , respectively, and the tops  101  and  201  may be coupled while overlapping each other. This configuration is shown in  FIGS. 24 and 25 . 
     Next, the first cool air guide channel  310  of the grille panel assembly  1  is described with reference to  FIGS. 9 and 10 . 
     The first cool air guide channel  310  may be a guide that guides cool air, which flows inside between the grille panel  100  and the shroud  200  through the first intake hole  210 , to flow to the freezing compartment  12  and the switch compartment  13 . 
     The first cool air guide channel  310  may be formed on at least any one surface of the facing surfaces between the grille panel  100  and the shroud  200 . 
     In particular, the first cool air guide channel  310  may be recessed on the rear of the grille panel  100  and the shroud  200  may be brought in close contact with the rear of the grille panel  100 , whereby the first cool air guide channel  310  may be formed as a channel isolated from the external environment. 
     In some examples, the first cool air guide channel  310  may be formed on the front of the shroud, may be formed separately from the grille panel  100  or the shroud  200  and then may be coupled between the grille panel  100  and the shroud  200 , and may be formed partially on the grille panel  100  and the shroud  200 . 
     The first cool air guide channel  310  may be formed around the first seat  160  from the portion where the first seat  160  is formed with an end rounded toward any one upper portion of the first seat  160  (opposite to the second seat). 
     That is, the first cool air guide channel  310  may be rounded in the direction in which cool air flows by rotation of the freezing fan  411 . 
     In particular, the end of the first cool air guide channel  310  may be open to the tops of the grille panel  100  and the shroud  200 . That is, since the first cool air guide channel  310  may be open upward from the grille panel assembly  1 , a pipe (e.g., a switch compartment cool air duct) connected to the first cool air guide channel  310  may face upward. 
     A switch compartment cool air duct  41  may be connected to the open portion of the first cool air guide channel  310  (see  FIGS. 23 to 25 ). The switch compartment cool air duct  41  may be a duct for supplying cool air to the switch compartment positioned over the freezing compartment  12  and the upper end of the switch compartment cool air duct  41  may be connected to the rear of the switch compartment  13  (see  FIG. 5 ). 
     The cool air circulating in the switch compartment  13  may be returned to the air intake side of the second evaporator  32  through a switch compartment return duct  42 . 
     The switch compartment return duct  42  may have an end connected to the lower portion of the rear of the switch compartment  13  and another end connected to the air intake side of the second evaporator  32 . 
     The two lower cool air discharge ports  120  and  130  discharging cool air to the freezing compartment  12  may be formed along the bottom in the first cool air guide channel  310 . 
     That is, cool air may be sequentially discharged to the freezing compartment  12  through the two lower cool air discharge ports  120  and  130  while flowing through the first cool air guide channel  310 . 
     In particular, the two lower cool air discharge ports  120  and  130  may be respectively formed at both sides of the lower space in the first cool air guide channel  310 . The portion between the two lower cool air discharge ports  120  and  130  may be substantially a portion that faces the lower space in the freezing compartment  12 , so if the lower cool air discharge ports  120  and  130  are formed, the cool air that is discharged through the lower cool air discharge ports  120  and  130  may hit against with the flow of the cool air returning to the lower space after circulating in the freezing compartment  12 . 
     As shown in  FIGS. 7 and 10 , a plurality of fastening protrusions  312 ,  313 , and  314  may be formed in the first cool air guide channel  310 . 
     The fastening protrusions  312 ,  313 , and  314  may be portions for fastening to the freezing fan module  410  and may protrude toward the first seat  160  from the surface facing the first seat  160  of the inside of the first cool air guide channel  310 . 
     The fastening protrusions  312 ,  313 , and  314  may be formed at positions considering the size and the blowing direction of the freezing fan  411 . 
     As shown in  FIGS. 7 and 9 , a channel opening/closing module  330  may be formed in the first cool air guide channel  310 . 
     The channel opening/closing module  330  may open/close to selectively preventing cool air flowing through the first cool air guide channel  310  from being discharged to the cool air outlet end of the first cool air guide channel  310 . 
     That is, supply of the cool air that is supplied to the switch compartment  13  through the first cool air guide channel  310  can be selectively allowed and prevented. Accordingly, articles may be kept in the switch compartment  13  under a temperature condition different from that of the freezing compartment  12 . 
     The channel opening/closing module  330  may be installed in the first cool air guide channel  310 . 
     In some cases, where a channel opening/closing module is provided separately from the grille panel assembly  1 , for example, at the cool air discharge side of the grille panel assembly  1  or at the cool air intake side of the switch compartment  13 , it may take long time to assemble each of the channel opening/closing module and the grille panel assembly  1 . In some cases, the storage space of the refrigerator can be decreased by the spaces for installing them. 
     In some cases, where the channel opening/closing module is provided separately from the grille panel assembly  1 , an additional connection structure may be needed for installing the channel opening/closing module. 
     In some implementations, the channel opening/closing module  330  can be integrated with the grille panel assembly  1  such that the entire installation space can be reduced, and the storage space of the freezing compartment  12  (or the switch compartment) can be increased. 
     In particular, since the channel opening/closing module  330  may be integrated with the grille panel assembly  1 , it may be possible to take out only the grille panel assembly  1  for maintenance, so maintenance may be easy. That is, in cases where the channel opening/closing module  330  and the grille panel assembly  1  are separately provided, they may be separated respectively from the cabinet  10 . In some implementations, the channel opening/closing module  330  is integrated with the grille panel assembly  1 , which may facilitate assembly or separation thereof. 
       FIGS. 26 to 36  show examples of the channel opening/closing module  330 .  FIGS. 26 to 34  show the structures and states in various directions of the channel opening/closing module, and  FIGS. 35 and 36  show example states in which the channel opening/closing module is installed and operated in the first cool air guide channel. 
     As shown in the figures, the channel opening/closing module  330  may include a damper case  331 , an opening/closing damper  332 , and a damper actuator  333 . 
     The damper case  331  may be disposed in the first cool air guide channel  310  to block the first cool air guide channel  310 . 
     The damper case  331  may have a rectangular frame shape having a through-hole  331   a  therein. 
     The through-hole  331   a  may communicate with the first cool air guide channel  310 . 
     The cool air outlet-side surface of the portion where the through-hole  331   a  of the damper case  331  is formed may be a flat surface. That is, the opening/closing damper  332  may be in close contact with the flat cool air outlet-side surface. 
     The damper case  331  may have a stopper  331   b.  The stopper  331   b  blocks the opening/closing damper  332  to be described below to excessive opening of the opening/closing damper  332 . 
     The stopper  331   b  may be formed by protruding upward a portion of the rear surrounding surface (in the rotational direction of the opening/closing damper) of the damper case  331  further than other portions. 
     A mounting protrusion  331   c  may protrude from the bottom of the damper case  331 . The mounting protrusion  331   c  may be a portion for coupling to the damper cover  350  to be described below. 
     The opening/closing damper  332  may be a part that opens/closes the through-hole  331   a  of the damper case  331 . 
     The opening/closing damper  332  may be a block that is in close contact with the cool air outlet-side surface of the damper case  331 . It may be a cuboid having a thickness smaller than the left-right width and the front-rear width. 
     Hinge shafts  332   a  may be formed at the rear corners of both sides of the opening/closing damper  332 . That is, the opening/closing damper  332  may selectively open/close the through-hole  331   a  of the damper case  331  by rotating about the hinge shafts  332   a.    
     The damper actuator  333  may be a part that operates the opening/closing damper  332 . 
     The damper actuator  333  may be an electric motor. 
     In particular, the damper actuator  333  may be configured to be able to control a rotational angle, may be a motor that may not control a rotational angle but may be controlled to the turned off when a load of a predetermined magnitude or more is applied, and may be a motor that may be controlled to be turned off by a switch, etc. 
     A motor shaft of the damper actuator  333  may be coupled to any one of the hinge shafts  332   a  of the opening/closing damper  332 . That is, the opening/closing damper  332  may be operated by operation of the actuating actuator  333 . 
     In some examples, the channel opening/closing module  330  may be configured to forcibly block or open the first cool air guide channel  310  by a solenoid or a cylinder, and may be configured in various other structures. 
     As shown in  FIGS. 8, 35, and 36 , a mounting stage  311  on which the channel opening/closing module  330  is mounted may be formed in the first cool air guide channel  310 . 
     The mounting stage  311  may be formed such that a portion of the first cool air guide channel  310  has a larger depth and width than adjacent portions. 
     The mounting stage  311  may be formed perpendicular to or parallel with the first cool air guide channel  310 . 
     Considering the rotational direction of the freezing fan  411  and the channel opening/closing module  330  installed on the mounting stage  311 , the mounting stage  311  can be disposed perpendicular to the first cool air guide channel  310  in terms of being able to reduce flow resistance. 
     However, when the mounting stage  311  is formed perpendicular to the first cool air guide channel  310 , most part of the channel opening/closing module  330  installed at the mounting stage  311  is positioned ahead of the second evaporator  32 , so there may be a large possibility of freezing, whereby there may be a possibility of malfunction. 
     In some cases, the mounting stage  311  may be formed in parallel with the first cool air guide channel  310  to prevent reduce freezing and malfunction of the channel opening/closing module  330 . 
     In some cases, when the mounting stage  311  is formed in parallel with the first cool air guide channel  310 , flow resistance of cool air may become large and the performance may be deteriorated. Further, the second evaporator  32  and the damper actuator  333  may be positioned close to each other, so there may be a possibility of damage (or malfunction) to the damper actuator  333 . 
     In some implementations, the mounting stage  311  can be inclined. For example, the mounting stage  311  can be inclined with respect to a horizontal direction in which a top surface of the grille panel assembly extends. That is, since the mounting stage  311  may be inclined, the channel opening/closing module  330  may also be installed at an angle on the mounting stage, whereby flow resistance of cool air may be reduced and malfunction due to freezing of the damper actuator  333  may also be reduced or prevented. 
     In particular, as shown in  FIG. 15 , the mounting stage  311  may be positioned over the top of the second evaporator  32  (for example, over the uppermost heat exchange fin). 
     That is, the mounting stage  311  may be positioned at the cool air outlet end of the first cool air guide channel  310 . 
     The mounting stage  311  may be positioned such that the channel opening/closing module  330  is positioned at the cool air outlet end of the first cool air guide channel  310  and cool air flowing through the first cool air guide channel  310  is sufficiently supplied to the freezing compartment  12  through the cool air discharge ports  110 ,  120 , and  130  and then may be supplied to the switch compartment  13 . 
     An end of the channel opening/closing module  330  may be positioned adjacent to the second evaporator  32  and another end of the channel opening/closing module  330  may be spaced apart from the evaporator  32  due to the inclined structure of the mounting stage  311 . Considering this, the damper actuator  333  of the channel opening/closing module  330  may be positioned at the other end of the channel opening/closing module  330  such that it may be positioned relatively far from the second evaporator  32 . 
     That is, the channel opening/closing module  330  may be installed such that it may maximally avoid influence of the second evaporator  32  and may reduce flow resistance of the cool air flowing through the first cool air guide channel  310 . 
     As shown in  FIGS. 7, 34, and 35 , the channel opening/closing module  330  may be surrounded by the damper cover  350  and mounted on the mounting stage  311 . 
     The damper cover  350  may be a part that protects the damper actuator  333  of the channel opening/closing module  330  from cool air. In some cases, the damper actuator  333  can include a motor. 
     The damper cover  350  may be made of a thermal insulating material. That is, the damper cover  350  made of a thermal insulating material may be installed to surround the channel opening/closing module  330 , whereby the channel opening/closing module  330  (in particular, the actuating actuator  333 ) may not be influenced by the coldness transmitted along the surface of the shroud  200  or the grille panel  100 . 
     The damper cover  350  may be made of Styrofoam, may be made of rubber or silicone, or may be made of a porous foaming material (e.g., a foam). In some examples, the damper cover  350  may be made of other thermal insulating materials not stated herein. 
     In some implementations, the damper cover  350  may be divided into a front cover and a rear cover with respect to the center. That is, assembly convenience may be provided by mounting the channel opening/closing module  330  on any one side cover and then covering the channel opening/closing module  330  with the other side cover. 
     The damper cover  350  may have a cool air inlet  351  and a cool air outlet  352  (see  FIGS. 34 and 35 ). 
     The cool air inlet  351  may be formed through the bottom wall of the damper cover  350  and communicate with the inside of the first cool air guide channel  310 . 
     The cool air outlet  352  may be formed through the top wall of the damper cover  350  and may be connected to the switch compartment cool air duct  41  at the cool air outlet end of the first cool air guide channel  310 . 
     In particular, a base stage  353  may be stepped around the cool air inlet  351  on the bottom inside the damper cover  350 . The mounting protrusion  331   c  protruding from the bottom of the damper case  331  may be accommodated in the base stage  353 . That is, the channel opening/closing module  330  may be mounted in position inside the damper cover  350  without moving by the coupling structure of the base stage  353  and the mounting protrusion  331   c.    
     A motor seat groove  354  in which the damper actuator  333  of the channel opening/closing module  330  may be formed inside the damper cover  350 . That is, the damper actuator  333  may be mounted in the motor seat groove  354  and may be thermally insulated from the external environment. 
     Next, the second cool air guide channel  320  of the grille panel assembly  1  is described with reference to  FIGS. 9 and 10 . 
     The second cool air guide channel  320  may be a guide that may guide cool air, which flows inside between the grille panel  100  and the shroud  200  through the second intake hole  220 , to flow to the ice making compartment  21 . 
     The second cool air guide channel  320  may be formed on at least any one surface of the facing surfaces between the grille panel  100  and the shroud  200 . 
     In particular, the second cool air guide channel  320  may be recessed on the rear of the grille panel  100  such that cool air flows therethrough. 
     The rear of the second cool air guide channel  320  may be open and the open rear of the second cool air guide channel  320  may be closed from the external environment by the shroud  200 . 
     In some examples, the second cool air guide channel  320  may be formed at the shroud  200 , and in this case, the second cool air guide channel  320  may be closed from the external environment by the grille panel  100 . 
     In some examples, the second cool air guide channel  320  may be manufactured separated from the grille panel  100  or the shroud  200  and then may be coupled between the grille panel  100  and the shroud  200 . 
     The second cool air guide channel  320  may be formed around the second seat  170  with the end reaching a side of the grille panel  100 . 
     The end of the second cool air guide channel  320  may be open to pass through a side of the grille panel  100 . 
     An end of the ice making compartment cool air duct  51  supplying cool air to the ice making compartment  21  may be connected to the open end of the second cool air guide channel  320 . The other end of the ice making compartment cool air duct  51  may be connected to a guide duct  22  supplying cool air to the ice making compartment  21 . 
     In particular, the second cool air guide channel  320  becomes narrows as it goes to the cool air outlet end. Accordingly, the flow pressure of coo air may be increased, whereby cool air may be supplied to a farther position. 
     The second seat  170  in which the ice making fan module  420  is seated may be formed in the second cool air guide channel  320 . 
     The second seat  170  is positioned at the end opposite to the end where the cool air outlet end of the second cool air guide channel  320  is positioned, in the second cool air guide channel  320 . Accordingly, the second cool air guide channel  320  may have a maximally large length. 
     A plurality of fastening protrusions  322 ,  323 , and  324  may be formed in the second cool air guide channel  320 . 
     The fastening protrusions  322 ,  323 , and  324  may be portions for coupling to the ice making fan module  420  to be described below and may protrude toward the second seat  170  from the surface facing the second seat  170  of the inside of the second cool air guide channel  320 . 
     The fastening protrusions  322 ,  323 , and  324  may be formed at positions considering the size and the blowing direction of the ice making fan  421 . 
     In detail, the fastening protrusions  322 ,  323 , and  324  may include a first fastening protrusion  322  positioned adjacent to the bottom at the cool air outlet end of the second cool air guide channel  320 , a second fastening protrusion  323  positioned adjacent to a first partition rib  510  to be described below, and a third fastening protrusion  324  positioned adjacent to a second partition rib  520  to be described below. 
     In particular, the circumference of the second intake hole of the second cool air guide channel  320  may be divided into a plurality of regions  321   a,    321   b,  and  321   c.    
     The regions  321   a,    321   b,  and  321   c  may include a first region  321   a  commonly positioned between the first partition rib  510  and the second partition rib  520 , which will be described below, and the ice making fan module  420 . 
     The regions  321   a,    321   b,  and  321   c  may include a second region  321   b  positioned between the bottom of the ice making fan module  420  and the second partition rib  520 . 
     The regions  321   a,    321   b,  and  321   c  may include a third region  321   c  positioned between the top of the ice making fan module  420  and the first partition rib  510  and communicating with the cool air outlet end of the second cool air guide channel  320 . 
     The regions  321   a,    321   b,  and  321   c  may be divided on the basis of the positions of the fastening protrusions  322 ,  323 , and  324 . 
     That is, the first region  321   a  may be the region between the second fastening protrusion  323  and the third fastening protrusion  324  around the ice making fan module  420 , the second region  321   b  may be the region between the third fastening protrusion  324  and the first fastening protrusion  322  around the ice making fan module  420 , and the third region  321   c  may be the region between the second fastening protrusion  323  and the first fastening protrusion  322  around the ice making fan module  420 . This configuration is shown in  FIG. 10 . 
     The third region  321   c  may be defined to supply substantially the same amount of cool air as the sum of the first region  321   a  and the second region  321   b,  and the second region  321   b  may be defined to supply a relatively larger amount of cool air than the first region  321   a.    
     That is, substantially half the entire cool air blown by operation of the ice making fan  421  may be supplied to the ice making compartment  21  and the other half may be supplied to the upper space and the lower space in the first cool air guide channel  310 . 
     By making the amount of the cool air that is supplied to the sections different, cool air may be supplied to the ice making compartment  21  and cool air may be sufficiently supplied to the freezing compartment  12  and the switch compartment  13 . 
     Most of the cool air that is supplied to the first cool air guide channel  310  through the first region  321   a  may be supplied to the freezing compartment  12  through the upper cool air discharge port  110 , and the cool air supplied to the first cool air guide channel  310  through the second region  321   b  and communicating channels  610  and  620  may be partially supplied to the freezing compartment  12  through the lower cool air discharge ports  120  and  130  and may be supplied to the switch compartment  13  together with the cool air flowing through the first cool air guide channel  310 . 
     As shown in  FIGS. 9 and 18 , close-contact portions  102  and  202  may be formed along the first cool air guide channel  310  and the second cool air guide channel  320  on the rear of the grille panel  100  and the front of the shroud  200 . 
     The close-contact portions  102  and  202  may be positioned to face each other. The close-contact portions  102  and  202  may be a groove and a protrusion that may be fitted to each other. 
     The close-contact portions  102  and  202  may be brought in close contact with each other (or fitted to each other) when the grille panel  100  and the shroud  200  are combined, and the insides of the first cool air guide channel  310  and the second cool air guide channel  320  may be closed from the external environment by the close contact of the two close-contact portions  102  and  202 . 
     Next, the freezing fan module  410  of the grille panel assembly  1  is described with reference to  FIGS. 14, 15, 37, and 38 . 
     The freezing fan module  410  may be a part that may blow the cool air that has passed through the second evaporator  32  to the first cool air guide channel  310 . 
     The freezing fan module  410  may include a freezing fan  411  and a first installation frame  412 . 
     The freezing fan  411  may be a slim centrifugal fan such that the thickness (front-rear width) of the grille panel assembly  1  may be maximally reduced. 
     The freezing fan  411  may include a hub  411   a,  a rib  411   b,  and a plurality of impellers  411   c.    
     The hub  411   a  may be coupled to a fan motor  413  through a shaft and may protrude forward (in the direction facing the cool air intake side) as it goes to the center, and the rear thereof may rapidly expand as it goes to the end. The fan motor  413  may be installed inside the hub  411   a.    
     The rib  411   b  may be a part formed to surround the hub  411   a.  The rib  411   b  may be a circular rim. 
     The impellers  411   c  may be parts provided to guide the blowing direction of cool air. The impellers  411   c  may be spaced apart from each other and may have a predetermined inclination (or may be rounded) such that cool air passes therebetween. 
     The first installation frame  412  may be a part on which the freezing fan  411  may be installed. 
     The first installation frame  412  may be fixed to the fastening protrusions  312 ,  313 , and  314  formed at the shroud  200 . 
     The fastening protrusions  312 ,  313 , and  314  may protrude toward the first seat  160  from the portion facing the first seat  160  in the first cool air guide channel  310  of the shroud  200 , and may be formed at positions considering the size and the blowing direction of the freezing fan  411 . 
     Fastening holes  412   a,    412   b,  and  412   c  for fastening to the fastening protrusions  312 ,  313 , and  314  may be formed at the first installation frame  412 , and the fastening protrusions  312 ,  313 , and  314  and the fastening holes  412   a,    412   b,  and  412   c  may be aligned to face each other and then fastened by fastening members. 
     Next, the ice making fan module  420  of the grille panel assembly  1  is described with reference to  FIGS. 14, 15, 37, and 38 . 
     The ice making fan module  420  may be a part that may blow the cool air that has passed through the second evaporator  32  to the second cool air guide channel  320 . 
     The ice making fan module  420  may include an ice making fan  421 , a second installation frame  422 , and a fan motor  423 . 
     The ice making fan  421  may be a slim centrifugal fan such that the thickness (front-rear width) of the grille panel assembly  1  may be maximally reduced. 
     The ice making fan  421  may include a hub  421   a,  a rib  421   b,  and a plurality of impellers  421   c.    
     The hub  421   a  may be coupled to a fan motor  423  through a shaft and may protrude forward (in the direction facing the cool air intake side) as it goes to the center, and the rear thereof may rapidly expand as it goes to the end. 
     The rib  421   b  may be a part formed to surround the hub  421   a.  The rib  421   b  may be a circular rim. 
     The impellers  421   c  may be parts provided to guide the blowing direction of cool air. The impellers  421   c  may be spaced apart from each other and may have a predetermined inclination (or may be rounded) such that cool air passes therebetween. 
     In particular, the ice making fan  421  may be provided as a fan that may be the same in structure and size as those of the freezing fan  411  of the freezing fan module  410 . Accordingly, the ice making fan  421  and the freezing fan  411  may be shared. 
     The fan motor  423  of the ice making fan  421  may be installed on the second installation frame  422 . 
     The second installation frame  422  may be fastened to a plurality of fastening protrusions  322 ,  323 , and  324  formed at the shroud  200 . 
     Fastening holes  422   a,    422   b,  and  422   c  for fastening to the fastening protrusions  322 ,  323 , and  324  may be formed at the second installation frame  422 , and the fastening protrusions  322 ,  323 , and  324  and the fastening holes  422   a,    422   b,  and  422   c  may be aligned to face each other and then fastened by fastening members. 
     In particular, the ice making fan module  420  may be configured to be positioned closer to the partition ribs  510  and  520  to be described below than the cool air outlet end of the second cool air guide channel  320  (see  FIG. 21 ). 
     That is, the ice making fan  421  of the ice making fan module  420  may be spaced a sufficient distance apart from the cool air outlet end of the second cool air guide channel  320 . 
     Accordingly, the cool air passing through the cool air outlet end of the second cool air guide channel  320  may be prevented from becoming turbulent without smoothly passing through the cool air outlet end by hitting against with flow of the cool air rotating in the rotational direction of the ice making fan  421 . The distance between the ice making fan module  420  and the cool air outlet end may be set to be at least 25 mm or more. 
     The ice making fan  421  of the ice making fan module  420  and the freezing fan  411  of the freezing fan module  410  may be controlled to rotate at different rotational speeds. 
     In detail, the ice making fan  421  of the ice making fan module  420  is controlled to rotate at a higher rotational speed than the freezing fan  411  of the freezing fan module  410 . 
     That is, since the freezing fan  411  may supply cool air to the freezing compartment  12  positioned ahead of the freezing fan  411 , the freezing fan  411  may rotate at a rotational speed where it may provide a large amount of cool air. However, since the ice making compartment  21  may be positioned far in comparison to the freezing compartment  12  or the switch compartment  13 , the ice making fan  421  may forcibly send air up to the ice making compartment  21  while operating at a higher rotational speed than the freezing fan  411 . 
     The center of the ice making fan module may be positioned lower than the center of the freezing fan module. A sufficient space in which cool air may flow may be provided between the ice making fan and the top of the grille panel. 
     Next, the partition ribs  510  and  520  of the grille panel assembly  1  are described with reference to  FIG. 10 . 
     The partition ribs  510  and  520  may be formed across the interface between the first cool air guide channel  310  and the second cool air guide channel  320 . That is, the two cool air guide channels  310  and  320  may provide channels separated by the partition ribs  510  and  520 . 
     The partition ribs  510  and  520  may be divided into a first partition rib  510  and a second partition rib  520 . That is, the partition ribs  510  and  520  may be divided into two parts and the ends of the two partition ribs  510  and  520  may be spaced apart in parallel with each other such that a first communicating channel  610  may be provided in the gap. 
     In some examples, one partition rib may be formed and the first communication channel  610  may be formed at any one portion of the partition rib. 
     The first partition rib  510  may protrude downward from the top of the grille panel  100 . 
     That is, the first partition rib  510  may be formed to block an upper portion from a center portion between the ice making fan module  420  and the freezing fan module  410 . 
     Cool air provided from the freezing fan module  410  may be prevented from being directly discharged to the cool air outlet end of the second cool air guide channel  320  by the structure of the first partition rib  510 . 
     The lower end of the first partition rib  510  may have a length to be positioned lower than the positions of the centers of the freezing fan module  410  and the ice making fan module  420 . Accordingly, it may be possible to minimize cool air flowing into the second cool air guide channel  320  after being produced by operation of the freezing fan module  410  and to enable cool air produced by operation of the ice making fan module  420  to be smoothly supplied to the upper cool air discharge portion  110  in the first cool air guide channel  310 . 
     In particular, the first partition rib  510  may be rounded to surround a portion of the circumference of the second seat  170 . 
     That is, the rounded structure of the first partition rib  510  may enable the cool air blown from the ice making fan module  420  to smoothly flow to the cool air outlet end of the channel opening/closing module  330 . Further, the rounded structure of the first partition rib  510  may enable to cool air blown from the freezing fan module  410  to pass through the freezing fan module  410  and the ice making fan module  420  and then smoothly flow to the lower portion in the first cool air guide channel  310 . 
     The second partition rib  520  may protrude upward from the bottom in the first cool air guide channel  310  of the rear of the grille panel  100 . 
     That is, the second partition rib  520  may be formed to block a lower portion from a center portion between the ice making fan module  420  and the freezing fan module  410 . 
     The structure of the second partition rib  520  may prevent the cool air provided from the ice making fan module  420  from flowing to the freezing fan module  410  in the first cool air guide channel  310  and may enable to cool air to smoothly flow to the upper cool air discharge port  110 . 
     The upper end of the second partition rib  520  may have a length to be positioned higher than the positions of the centers of the freezing fan module  410  and the ice making fan module  420 . Accordingly, it may be possible to minimize the cool air provided from the freezing fan module  420  and flowing to the portion where the ice making fan module  420  is positioned and to enable the cool air produced by operation of the ice making fan module  420  to be smoothly supplied to the upper cool air discharge port  110  in the first cool air guide channel  310 . 
     Further, the second partition rib  520  may be rounded to surround a portion of the circumference of the second seat  170 . 
     That is, the rounded structure of the second partition rib  520  may enable the cool air blown from the ice making fan module  420  to smoothly flow to any one end portion (where the ice making module is positioned) of the upper cool air discharge port  110 . 
     In particular, a guide rib  521  may be formed at the lower end portion of the second partition rib  520 . 
     The guide rib  521  may gradually protrude toward the bottom of the first cool air guide channel  310  and may be rounded toward the lower end of the second partition rib  520  such that cool air flows to any one end of the bottom in the first cool air guide channel  310 . 
     That is, cool air flowing down on the surface of the second partition rib  520  may be guided by the guide rib  521  to smoothly flow to the first lower cool air discharge port  120  positioned at any one side of the bottom in the first cool air guide channel  310 . 
     The lower end of the first partition rib  510  and the upper end of the second partition rib  520  may be spaced apart from each other. The gap may be provided as the first communicating channel  610 . That is, the first communication channel  610  may be formed by spacing the two partition ribs  510  and  520 , and the cool air in the second cool air guide channel  320  that is blown by the ice making fan module  420  may be partially supplied into the first cool air guide channel  310  through the first communicating channel  610 . This configuration will be described again below. 
     Next, communication channels  610  and  620  of the grille panel assembly  1  are described with reference to  FIG. 10 . 
     The communication channels  610  and  620  may be channels guiding a portion of the cool air in the second cool air guide channel  320  to the first cool air guide channel  310  when the ice making fan is operated. 
     That is, when the ice making fan  421  is operated, the first cool air guide channel  310  may be supplied with a portion of the cool air in the second cool air guide channel  320  through the communicating channels  610  and  620 , whereby the pressures in the first cool air guide channel  310  and the second cool air guide channel  320  may equally increase. Accordingly, the cool air in the switch compartment  13  or the freezing compartment may be prevented from flowing backward to the ice making fan  421  due to a pressure difference between the two cool air guide channels  310  and  320 . 
     The communicating channels  610  and  620  may include the first communicating channel  610 . 
     The first communicating channel  610  may be formed to guide the cool air in the first region  321   a  of the second cool air guide channel  320  to the upper space (the space in which the upper cool air discharge port is positioned) in the first cool air guide channel  310 . 
     The first communicating channel  610 , as described above, may be formed by the gap between the ends of the two partition ribs  510  and  520 . 
     In particular, the ends of the two partition ribs  510  and  520  may be disposed partially in parallel with each other, whereby the first communicating channel  610  may form a passage having a predetermined length. 
     The first communicating channel  610  may be formed toward any one end of the upper cool air discharge port  110 . Accordingly, it may be possible to reduce the phenomenon that the cool air supplied to the upper cool air discharge port  110  through the first communicating channel  610  is interfered by hitting against the cool air flowing in the first cool air guide channel  310 . 
     To this end, the lower end of the first partition rib  510  may be disposed relatively close to the ice making fan module  420  in comparison to the upper end of the second partition rib  520 , and the upper end of the second partition rib  520  may be positioned over the lower end of the first partition rib  510 . The spacing and overlapping structure of the two partition ribs  510  and  520  may enable the cool air blown by the ice making fan module  420  to be smoothly supplied to the freezing compartment  12  through the upper cool air discharge port  110 . 
     When the freezing fan module  410  is operated with the ice making fan module  420  stopped (or when the ice making fan module is stopped while the freezing fan module is operated), the cool air in the first cool air guide channel  310  may be supplied into the second cool air guide channel  320  through the first communicating channel  610 . Accordingly, cool air may be insufficiently supplied to the freezing compartment  12 . 
     Considering this, the ice making fan module  420  may be configured to enable the cool air flowing in the second cool air guide channel  320  to be smoothly supplied into the first cool air guide channel  310  through the first communicating channel  610  and to reduce the cool air flowing in the first cool air guide channel  310  and supplied into the second cool air guide channel  320  through the first communicating channel  610  (hereafter, referred to as “backward flow”). 
     Various configurations may be considered to reduce the backward flow. 
     For example, the first fastening protrusion  312  of the fastening protrusions  312 ,  323 , and  314  formed in the first cool air guide channel  310  may reduce the backward flow by being positioned at the position where the flow guide stage  161  is formed in the open top of the first seat  160 . 
     That is, by positioning the first fastening protrusion  312  at the portion facing the first communicating channel  610  in the flow path of the cool air rotating around the freezing fan  411 , it may be possible to prevent the cool air from directly flowing to the first communicating channel  610  by hitting against the first fastening protrusion  312 . 
     The flow guide stage  161  formed in the first seat  160  may be used to reduce the backward flow. 
     That is, it may be possible to reduce the backward flow by guiding the cool air rotating around the freezing fan  411  of the freezing fan module  410  toward any one side of the upper cool air discharge port  110  using the flow guide stage  161 . 
     The second fastening protrusion  323  and the third fastening protrusion  324  of the fastening protrusions  322 ,  323 , and  324  coupled to the second installation frame  422  of the ice making fan module  420  may be installed to be positioned adjacent to the first partition rib  510  and the second partition rib  520 , respectively, whereby it may be possible to reduce the backward flow. 
     That is, the two partitioning fastening protrusions  323  and  324  may be positioned respectively adjacent to the first partition rib  510  and the second partition rib  520 , and the gap between the second fastening protrusion  323  and the first partition rib  510  adjacent to the second fastening protrusion  323  and the gap between the third fastening protrusion  324  and the second partition rib  520  adjacent to the third fastening protrusion  324  may be minimized. 
     Accordingly, the cool air in the first cool air guide channel  310  may be locked in the first region  321   a  in the second cool air guide channel  320  and may not flow to the third region  321   c  through the first communicating channel  610  between the two partition ribs  510  and  520 . 
     In some implementations, various configurations that may reduce the backward flow may be additionally provided other than the flow guide stage  161 , or the first fastening protrusion  312  in the first cool air guide channel  310 , and the two partition fastening protrusions  323  and  324  in the second cool air guide channel  320 . 
     The communicating channels  620  and  620  may include the second communicating channel  620 . 
     The second communicating channel  620  may be formed to guide the cool air in the second region  321   b  of the second cool air guide channel  320  to the lower space (the space in which the lower cool air discharge port is positioned) in the first cool air guide channel  310 . 
     To this end, the second communicating channel  620  may be formed to connect the second region  321   b  and the first cool air guide channel  310 . 
     In particular, the second communicating channel  620  may be formed to be positioned under the ice making fan module  420 . Accordingly, condensate water produced in the second cool air guide channel  320  may be discharged to the lower space in the first communicating channel  610  through the second communicating channel  620 . 
     That is, a separate condensate water outlet communicating with the inside of the cabinet  10  to remove condensate water may not be formed at the second cool air guide channel  320  due to the second communicating channel  620 , and a pressure drop due to such a condensate water outlet may be prevented. 
     In detail, the second communicating channel  620  may be formed through the lower end of the second partition rib  520 . 
     The second communicating channel  620  may be formed to be gradually narrowed toward the cool air outlet end. Accordingly, the cool air passing through the second communicating channel  620  may be gradually increased in flow speed and supplied to the first cool air guide channel  310  due to a high pressure, whereby the cool air flowing in the first cool air guide channel  310  may be prevented from flowing backward to the second cool air guide channel  320  through the second communicating channel  620 . 
     The cool air flowing into the first cool air guide channel  310  through the second communicating channel  620  may hit against the cool air flowing in the first cool air guide channel  310  in the process of flowing inside. 
     That is, the cool air flowing through the first cool air guide channel  310  and the cool air passing through the second communicating channel  620  may meet each other at the lower end of the guide rib  521  by the freezing fan  411 , so the two items of flow may hit against each other, whereby coo air may not smoothly flow along the bottom in the first cool air guide channel  310 , which may cause the problem that cool air may not be smoothly discharged to the first lower cool air discharge port  120  or the second lower cool air discharge port  130 . 
     In consideration of this problem, a non-contact stage  522  may be formed on the rear (facing the shroud) of the guide rib  521  of the second partition rib  520 . 
     The non-contact stage  522  may be inclined gradually away from the front of the shroud as it goes to the end of the guide rib  521 . 
     That is, a portion of the cool air passing through the second communicating channel  620  may be guided by the non-contact stage  522  to flow to the front of the shroud  200 . 
     Accordingly, it may be possible to direct hitting of the cool air flowing through the first cool air guide channel  310  and the cool air flowing into the first cool air guide channel  310  through the communicating channel  600  due to the freezing fan  411 , so cool air may smoothly flow along the bottom in the first cool air guide channel  310 . Accordingly, cool air may be smoothly discharged to the first lower cool air discharge port  120  or the second lower cool air discharge port  130 . 
     Next, the controller is described. 
     The controller may be a device controlling the operation of the refrigerator. 
     The controller may be configured to control the operation of a compressor, the operation of the fan modules  410  and  420  and the channel opening/closing module  320 , and perform a freezing operation (S 100 ), a switch compartment operation (S 200 ), or an ice making operation (S 300 ). 
     In particular, the controller may control the freezing fan  411  and the ice making fan  421  to operate at different rotational speeds. That is, the controller may control the freezing fan  411  to rotate at a higher speed than the ice making fan  421  or control the ice making fan  421  to rotate at a higher speed than the freezing fan  411 . 
     The process of controlling the temperatures of the storage compartments  12 ,  13 , and  21  by the operation of the refrigerator is described hereafter. 
     First, the process of controlling the temperature of the freezing compartment  12  is described with reference to  FIGS. 39 to 45 . 
       FIG. 39  is a flowchart showing a control process in a freezing operation of the method of controlling the operation of the refrigerator. 
       FIG. 40  is a side cross-sectional view showing the flow of cool air in a freezing operation for the freezing compartment of the refrigerator,  FIG. 41  is an enlarged view of the part “E” of  FIG. 40 ,  FIG. 42  is a state view showing cool air flow in the grille panel in the freezing operation for the freezing compartment of the refrigerator, and  FIG. 43  is an enlarged view of the part “F” of  FIG. 42 . 
     As in the flowchart of  FIG. 39 , the freezing operation (S 100 ) may be started through a first checking process (S 110 ) in which the controller checks whether the performing condition of the freezing operation is satisfied on the basis of the temperature of the freezing compartment  12  sensed by a temperature sensor  150   a  installed in the grille panel assembly  1 . 
     That is, when the performing condition of the freezing operation is satisfied through the first checking process (S 110 ), the freezing operation may be controlled to be started. 
     The performing condition of the freezing operation (S 100 ) may be a condition about whether the temperature of the freezing compartment  12  is out of a set freezing temperature range (e.g., a temperature range between −13° C.˜6° C.). 
     When the temperature of the freezing compartment  12  is determined as being higher than the set temperature range by the first checking process (S 110 ) and the performing condition of the freezing operation is satisfied, the controller may perform a second checking process (S 120 ) checking whether it corresponds to a performing condition of a refrigerating operation. 
     The second checking process (S 120 ) may be whether the refrigerating operation is performed now, which may be performed by checking whether the blowing fan of the grille panel assembly  2  positioned in the refrigerating compartment  11  is being operated or whether a refrigerant is being supplied to the first evaporator  31 . 
     In some examples, the second checking process (S 120 ) may be performed on the basis of the temperature of the refrigerating compartment provided from the temperature sensor of the grille panel assembly  2  disposed in the refrigerating compartment  11 . That is, when it is determined that the temperature of the refrigerating compartment  11  is higher than a predetermined refrigerating temperature range, it may be determined that the refrigerating operations is being performed. 
     When it is determined that the refrigerating operation is being performed, it may be determined that it does not correspond to the performing condition of the freezing operation and the freezing fan  411  may keep stopped until the freezing operation is finished, whereby the second checking process (S 120 ) may be repeated without the freezing operation performed. 
     If it is determined that the refrigerating operation is not performed through the second checking process (S 120 ), the controller may control the operation of the freezing fan module  410  and the compressor. 
     Accordingly, power may be supplied to the freezing fan module  410 , the freezing fan  411  may be rotated and the compressor may be operated, whereby the second evaporator  32  may exchange heat and a freezing process (S 130 ) may be performed. 
     When the freezing operation (S 130 ) is performed (a switch compartment operation is not performed), the opening/closing damper  332  of the channel opening/closing module  330  may be positioned to block the through-hole  331   a  of the damper case  331  (the state shown in  FIG. 44 ), whereby the cool air outlet end of the first cool air guide channel  310  may keep closed. 
     When the freezing fan  411  is controlled to operate by the controller, the air in the freezing compartment  12  may be sent to pass through the second evaporator  32  by the air blowing force by the freezing fan  411  and may exchange heat through the second evaporator  32 . 
     The air (cool air) that has exchanged heat may flow into the first cool air guide channel  310  through the first intake hole  210  of the shroud  200  and then may flow through the first cool air guide channel  310 , and may be supplied to the upper space in the freezing compartment  12  through the upper cool air discharge port  110  formed in the grille panel  100 . 
     In particular, considering that the bottom wall  113  of the upper cool air discharge port  110  may be inclined upward as it goes in the protruding direction, the cool air flowing in the circumferential direction of the freezing fan  411  may be guide to the bottom wall  113  of the upper cool air discharge port  110  and then may be smoothly discharged toward the front of the upper cool air discharge port  110  while flowing on the bottom wall  113 . 
     The cool air not discharged to the upper cool air discharge port  110  of the cool air flowing by the blowing force of the freezing fan  411  may flow through the upper cool air discharge port  110  and may be supplied to the middle portion in the freezing compartment  12  while sequentially passing through the first lower cool air discharge port  120  and the second lower cool air discharge port  130  formed in the first cool air guide channel  310  while passing through the first cool air guide channel  310 . 
     A half or more of the cool air that has passed through the first intake hole  210  may be discharged to the upper cool air discharge port  110  and the other cool air may be discharged to the first lower cool air discharge port  120  and the second lower cool air discharge port  130 . 
     In particular, considering that the cool air outlet end of the first cool air guide channel  310  may be closed by the channel opening/closing module  330 , most of the cool air flowing through the first cool air guide channel  310  may be supplied to the middle space in the freezing compartment  12  through the lower cool air discharge ports  120  and  130  and a portion of the cool air may rise and may be supplied to the portion where the top is positioned in the freezing compartment  12  through the upper cool air discharge port  110 . 
     In some examples, a portion of the cool air not discharged to the upper cool air discharge port  110  and flowing down through the first cool air guide channel  310  may flow into the second cool air guide channel  320  through the first communicating channel  610  between the two partition ribs  510  and  520  due to the flow of the cool air produced in the same direction as the rotational direction of the freezing fan  411 . 
     However, the flow of the cool air produced in the same direction as the rotational direction of the freezing fan  411  may be prevented from directly flowing to the first communicating channel  610  by being blocked by the flow guide stage  161  formed in the first seat  160  and the first fastening protrusion  312  in the first cool air guide channel  310 . The cool air may be guided up to the end of the first cool air guide channel  310  by the inclined (or rounded) structure of the flow guide stage  161 . The cool air flow may be made clear through  FIG. 45 . 
     In some examples, in the cool air flowing to the bottom in the first cool air guide channel  310  from the top in the first cool air guide channel  310 , a partial cool air flowing down on the surfaces of the partition ribs  510  and  520  may flow into the first region  321   a  of the second cool air guide channel  320 . 
     However, since the first region  321   a  may be substantially separated from the third region  321   c,  the amount of cool air flowing to the ice making compartment through the third region  321   c  may be very small, so it may not influence temperature control of the freezing compartment  12 . 
     While the cool air is supplied to the freezing compartment  12  through the lower cool air discharge ports  120  and  130 , the discharge direction may be guided by the grille ribs  121  and  131  formed in the lower cool air discharge ports  120  and  130 . That is, the cool air may be uniformly discharged throughout the inside of the freezing compartment  12  by the grille ribs  121  and  131 . 
     The flow of the cool air flowing through the first cool air guide channel  310  may be guided not only by the top and the bottom in the first cool air guide channel  310 , but also by the partition ribs  510  and  520 . 
     That is, a portion of the cool air that has passed through the upper cool air discharge port  110  while flowing on the top in the first cool air guide channel  310  may flown on the surface of the second partition rib  520 , and in this process, it may be guided by the guide rib  521  formed at the lower end portion of the second partition rib  520  to flow to the portion where the first lower cool air discharge port  120  is formed. 
     Accordingly, the cool air guided to flow by the guide rib  521  may be supplied to the freezing compartment  12  through the first lower cool air discharge port  120 . 
     The cool air not discharged to the first lower cool air discharge port  120  may flow to the second lower cool air discharge port  130  while flowing on the bottom in the first cool air guide channel  310  and may be discharged into the freezing compartment  12  through the second lower cool air discharge port  130 . 
     In particular, since the bottom in the first cool air guide channel  310  may be rounded, the cool air that has passed through the first lower cool air discharge port  120  may smoothly flow to the second lower cool air discharge port  130  while flowing on the bottom in the first cool air guide channel  310 . 
     The cool air supplied into the freezing compartment  12  through the cool air discharge ports  110 ,  120 , and  130  may be guided to return to the air intake side of the second evaporator  32  by the suction guide  140  formed in the grille panel  100  after flowing in the freezing compartment  12 . 
     In particular, considering that the suction guide  140  may be inclined (or rounded) in the freezing compartment  12 , the cool air flowing on the inclined wall of the machine room  15  after flowing in the freezing compartment  12  may be guided to smoothly flow to the air intake side of the second evaporator  32  by the suction guide  140 . 
     Whether the temperature in the freezing compartment may be continuously checked by the temperature sensor  150   a  installed in the grille panel  100  while the freezing operation of supplying cool air to the freezing compartment  12  is performed, and accordingly, when it is checked that the temperature in the freezing compartment  12  decreases under a set temperature (a set temperature condition is satisfied), the operation of the freezing fan  411  and the refrigeration cycle may be stopped such that supply of cool air is stopped. 
     In some examples, when the temperature in the freezing compartment  12  increases over the set temperature, the operation of the freezing fan  411  and the refrigeration cycle may be restarted and cool air may be supplied to the freezing compartment  12 . 
     Accordingly, the temperature in the freezing compartment  12  may be controlled to reach the set temperature range by repeated circulation of the air (cool air). 
     When the freezing process (S 130 ) is performed, a third checking process (S 140 ) of checking whether an end condition of the freezing process (S 130 ) is finished may be performed. 
     The end condition of the freezing process (S 130 ) may be the case when the temperature in the freezing compartment is further lower than the set temperature. The set temperature may be set as a temperature that is in a set freezing temperature range of the first checking process (S 110 ) and is further lower than the maximum temperature of the freezing temperature range. 
     For example, when the freezing temperature range is −16° C.˜6° C., the set temperature may be −13° C. In some examples, the set temperature may be a temperature further lower than the freezing temperature range. 
     Then the internal temperature of the freezing compartment  12  satisfies the end condition of the freezing operation in the third checking process (S 140 ), the controller may finish the freezing operation by performing a stopping process (S 150 ) of stopping the operation of the freezing fan  411 . 
     The ice making fan  421  may also be operated while the temperature of the freezing compartment  12  is controlled. 
     That is, considering that the ice making operation (S 300 ) is continuously performed except for a specific condition (e.g., when the ice storage of the ice making compartment is full with ice, etc.), the ice making operation (S 300 ) may be performed while the freezing operation (S 100 ) is performed. 
     If the ice making operation (S 300 ) is also performed while the freezing operation (S 100 ) is performed, flow of cool air sequentially flowing through the second intake hole  220  and the second cool air guide channel  320  may be generated by the operation of the ice making fan  421 . 
     The cool air produced by the operation of the ice making fan  421  may be partially supplied to the first cool air guide channel  310  through the first communicating channel  610  and the second communicating channel  620  and the other cool air may be supplied to the ice making compartment  21  through the ice making compartment cool air duct  51  connected to the second cool air guide channel  320 . 
     That is, the cool air blown to the first region  321   a  of the second cool air guide channel  320  through the second intake hole  220  may be supplied to the first cool air guide channel  310  through the first communicating channel  610 , the cool air blown to the second region  321   b  of the second cool air guide channel  320  through the second intake hole  220  may be supplied to the first cool air guide channel  310  through the second communicating channel  620 , and the cool air blown to the third region  321   c  of the second cool air guide channel  320  through the second intake hole  220  may be supplied to the ice making compartment  21  through the ice making compartment cool air duct  51  connected to the cool air outlet end of the second cool air guide channel  320 . 
     Accordingly, since not only the cool air blown by the operation of the freezing fan  411 , but also the cool air blown by the operation of the ice making fan  421  may be supplied into the freezing compartment  12 , cool air may be sufficiently supplied. 
     The flow of cool air when the freezing operation and the ice making operation are both performed is shown in  FIGS. 46 to 50 . 
     In particular,  FIG. 49  shows the flow of cool air discharged to the upper cool air discharge port when the freezing operation and the ice making operation are both performed, and  FIG. 50  shows the flow of cool air discharged to the lower cool air discharge ports when the freezing operation and the ice making operation are both performed. 
     In some examples, a separate cool air discharge port may be additionally formed between the two lower cool air discharge ports  120  and  130 . However, cool air discharged through the additionally formed cool air discharge port may hit against the flow of cool air returning to a lower space after circulating in the freezing compartment  12 . Accordingly, a separate lower cool air discharge port may not be formed between the two lower cool air discharge port  120  and  130 . 
       FIG. 51  shows the flow of cool air when a separate lower cool air discharge port is further formed between the two lower cool air discharge ports  120  and  130 , in which it may be seen that the amount of cool air flowing to both walls in the freezing compartment is relatively small, so the freezing compartment may not be uniformly frozen. 
     Next, the switch compartment operation (S 200 ) for temperature control of the switch compartment  13  is described with reference to  FIGS. 52 to 56 . 
       FIG. 52  is a flowchart showing a control process in a switch compartment operation of the method of controlling the operation of the refrigerator. 
       FIG. 53  is a side cross-sectional view showing the flow of cool air in a freezing operation for the switch compartment of the refrigerator,  FIG. 54  is an enlarged view of the part “H” of  FIG. 53 ,  FIG. 55  is a state view showing cool air flow in the grille panel assembly in the freezing operation for the switch compartment of the refrigerator, and  FIG. 56  is a state view of main part showing the state of the channel opening/closing module in the freezing operation of the switch compartment. 
     As shown in  FIG. 52 , the switch compartment operation (S 200 ) may be performed by the operations of the freezing fan module  410  and the compressor and the operation of the channel opening/closing module  330 . 
     That is, when whether there is a request for the switch compartment operation (S 200 ) is checked (S 120 ) and then when there is a request for the switch compartment operation (S 200 ), the controller may rotate the freezing fan  411  by supplying power to the freezing fan module  410  and may operate the compressor such that the second evaporator performs heat exchange. Further, the controller may control the damper actuator  333  of the channel opening/closing module  330  such that the opening/closing damper  332  opens the through-hole  331   a  of the damper case  331  (S 220 ). 
     Accordingly, air flowing to the second evaporator  32  from the freezing compartment  12  by the blowing force of the freezing fan  411  may exchange heat through the second evaporator  32 . The air (cool air) that has exchanged heat may keep flow through the first intake hole  210  of the shroud  200  and then may flow into the first cool air guide channel  310  between the grille panel  100  and the shroud  200 . 
     Thereafter, the cool air may flow through the first cool air guide channel  310  and may be supplied to the top in the freezing compartment  12  through the upper cool air discharge port  110  formed in the grille panel  100 . 
     In the cool air flowing by the blowing force of the freezing fan  411 , the other cool air not discharged to the upper cool air discharge port  110  may flow through the first cool air guide channel  310 . 
     A portion of the cool air flowing through the first cool air guide channel  310  may be supplied to the middle portion in the freezing compartment  12  sequentially through the first lower cool air discharge port  120  and the second lower cool air discharge port  130  formed in the first cool air guide channel  310 . The other cool air may be supplied to the switch compartment  13  through the switch compartment cool air duct  41  connected to the cool air outlet end of the first cool air guide channel  310  after passing through the through-hole  331   a  of the damper case  331  positioned at the mounting stage  311  of the first cool air guide channel  310 . 
     The cool air discharged to the upper cool air discharge port  110  through the first intake hole  210  may be discharged a little in comparison to the state in which the first cool air guide channel  310  is closed, and the cool air discharged to the first lower cool air discharge port  120  and the second lower cool air discharge port  130  may be discharge less than the cool air supplied to the switch compartment  13 . Accordingly, cool air may be sufficiently supplied to the switch compartment  13 . 
     When cool air is supplied to the switch compartment  13 , the ice making fan  421  may also be controlled to rotate. 
     That is, a portion of the cool air flowing in the second cool air guide channel  320  through the second intake hole  220  by the operation of the ice making fan  421  may be supplied to the first cool air guide channel  310  through the first communicating channel  610  and the second communicating channel  620 . Accordingly, more cool air may be supplied to the switch compartment  13  due to the cool air additionally supplied to the first cool air guide channel  310 , whereby quick temperature control may be possible. 
     The cool air supplied into the switch compartment  13  in this process may flow in the switch compartment  13  and then may be guided to return to the air intake side of the second evaporator  32  by the switch compartment return duct  42  connected to the switch compartment  13 . 
     Since the switch compartment cool air duct  41  may be connected to the upper portion of the rear wall of the switch compartment  13  and the switch compartment return duct  42  may be connected to the lower portion of the rear wall of the switch compartment  13 , the air flowing into the switch compartment  13  may be discharged through the switch compartment return duct  42  after sufficiently flowing in the switch compartment  13 . 
     The temperature inside the switch compartment  13  may be performed using a switch compartment temperature sensor. The switch compartment temperature sensor may be positioned to be exposed to the inside of the switch compartment  13  and may be configured to sense the temperature inside the switch compartment  13 . 
     Accordingly, the temperature in the switch compartment  13  may be controlled by repeated circulation of the air (cool air). 
     When a switch compartment operation end condition is satisfied by repetition of the process, the damper actuator  333  of the channel opening/closing module  330  may be controlled such that the opening/closing damper  332  closes the through-hole  331   a  of the damper case  331 . 
     Accordingly, the switch compartment operation (S 200 ) is finished. 
     Next, an operation (ice making operation) for temperature control of the ice making compartment  21  is described with reference to  FIGS. 57 to 61 . 
       FIG. 57  is a side cross-sectional view showing the flow of cool air in an ice making operation for the switch compartment of the refrigerator,  FIG. 58  is an enlarged view of the part “I” of  FIG. 57 ,  FIG. 59  is a state view showing cool air flow in the grille panel assembly in the ice making operation of the refrigerator,  FIG. 60  is an enlarged view of the part “J” of  FIG. 59 ,  FIG. 61  is a state view showing the flow of cool air supplied and returned to the ice making compartment in the ice making operation of the refrigerator. 
     Temperature control of the ice making compartment  21  may be performed by the operation of the ice making fan  421  when power is supplied to the ice making fan module  420 . In this case, the compressor may be operated or stopped, depending on the operation condition of the freezing compartment  12 . 
     When the ice making fan  421  is operated, the cool air in the freezing compartment  12  may exchange heat through the second evaporator  32  and may keep flow into the first region  321   a,  the second region  321   b,  and the third region  321   c  of the second cool air guide channel  320  through the second intake hole  220  of the shroud  200 . 
     The cool air may be discharged from the second cool air guide channel  320  through the portion communicating with the regions  321   a,    321   b,  and  321   c.    
     The cool air flowing in the first region  321   a  by the operation of the ice making fan  421  may be supplied to the upper space in the first cool air guide channel  310  through the first communicating channel  610 , the cool air blown to the second region  321   b  may be supplied to the lower space in the first cool air guide channel  310  through the second communicating channel  620 , and the cool air blown to the third region  321   c  may be supplied to the ice making compartment  21  after flowing to the ice making compartment cool air duct  51 . 
     The cool air supplied to the first cool air guide channel  310  through the first communicating channel  610  may be supplied to the freezing compartment  12  through the upper cool air discharge port  110  while being blown toward the upper cool air discharge port  110  in the first cool air guide channel  310 , and the cool air supplied to the first cool air guide channel  310  through the second communicating channel  620  may be supplied to the first lower cool air discharge port  120  and the second lower cool air discharge port  130  while flowing on the bottom of the first cool air guide channel  310 . This configuration is shown in  FIGS. 59 and 60 . 
     In particular, the ice making fan  421  may be positioned at any one end of the second cool air guide channel  320  and the ice making compartment cool air duct  51  may be connected to another end of the second cool air guide channel  320 . Accordingly, the flow resistance of cool air that may be generated by adjacent arrangement of the cool air intake side and the cool air discharge side of the second cool air guide channel  320  may be very small, so cool air may smoothly flow up to the ice making compartment. 
     The cool air that has exchanged heat through the second evaporator  32  may flow backward through the second intake hole  220  by flow resistance when it is discharged in the discharge direction of the ice making fan  421  through the second intake hole  220 . 
     However, since the second intake hole  220  may be configured such that the impellers  421   c  of the ice making fan  421  are covered (or covered half or more) by the covering member  222 , the cool air discharged from the ice making fan  421  may not flow backward through the second intake hole  220 . Further, the cool air has high blowing pressure in comparison to the cool air blown through the first intake hole  210  and the first cool air guide channel  310 . 
     Since the ice making fan  421  may be controlled to rotate at a higher rotational speed than the freezing fan  411 , the cool air blown by the ice making fan  421  may have higher blowing pressure. 
     In particular, the cool air discharged from the third region  321   c  may flow toward the second region  321   b  positioned in the rotational direction of the ice making fan  421 . However, considering that the third region  321   c  and the second region  321   b  may be substantially separated from each other by the ice making fan module  420 , the cool air discharged to the third region  321   c  all may be guided by the second cool air guide channel  320  to flow toward the cool air outlet end of the second cool air guide channel  320 . 
     Accordingly, the cool air supplied to the ice making compartment  21  may be less than the cool air supplied to the freezing compartment  12 , but may be smoothly and sufficiently forcibly sent up to the ice making compartment  21  by high blowing pressure. 
     The cool air supplied to the ice making compartment  21  may freeze the water (other drinks) in the ice tray while flowing in the ice making compartment  21 . This configuration is shown in  FIG. 60 . 
     Thereafter, the cool air flowing in the ice making compartment  21  may be guided to return to the freezing compartment  12  by the ice making compartment return duct  52 . This configuration is shown in  FIGS. 57 and 58 . 
     The cool air returned to the freezing compartment  12  may flow in the freezing compartment  12  and may be guided to return to the air intake side of the second evaporator  32  by the suction guide  140  formed in the grille panel  100 . 
     If the temperature in the ice making compartment  21  is lower than a set temperature, the operation of the ice making fan  421  may be stopped and supply of the cool air to the ice making compartment  21  may be stopped. 
     Accordingly, the temperature in the ice making compartment  21  may be controlled by repeated circulation of the air (cool air). 
     In some examples, the cool air flowing in the regions of the second cool air guide channel  320  in the ice making operation may flow to another region by rotational flow due to the operation of the ice making fan  421 . 
     However, since the regions  321   a,    321   b,  and  321   c  may be substantially separated from each other by the portions where the fastening protrusions  322 ,  323 , and  324  of the ice making fan module  420  are formed, there may be only fine flow of cool air between the regions  321   a,    321   b,  and  321   c  and the regions may not largely influence the flow of cool air flowing to another region. 
     A portion of the cool air flowing to the ice making compartment cool air duct  51  through the second cool air guide channel  320  while the ice making operation is performed may provide intensive coldness to the ice maker  12   a  positioned in the freezing compartment  12  through the ice making outlet  171  and the discharge guide pipe  172 . 
     In particular, the ice maker  12   a  may be positioned ahead of the ice making outlet  171  and the discharge guide pipe  172  may be positioned adjacent to the ice maker  12   a.    
     Accordingly, since the ice produced in the ice maker  12   a  in the freezing compartment  12  may be produced by sufficient coldness, poor freezing in which the inside of ice remains hollow without being frozen may be prevented. 
     As a result, the refrigerator may use two fan modules  410  and  420  and may be configured to obtain a large amount of air or a high blowing pressure, depending on the uses of the fan modules  410  and  420 , so a fan module may be shared. 
     Further, according to the refrigerator, by optimizing the installation positions of the fan modules  410  and  420  and the positions of the intake holes  210  and  220  for sending cool air into the fan modules  410  and  420 , respectively, cool air may be sufficiently supplied into the freezing compartment  12  and cool air may also be supplied to the relatively far ice making compartment  21 . 
     Further, according to the refrigerator, since the freezing fan module  410  and the ice making fan module  420  may be positioned at the upper portion of the grille panel assembly  1 , and the first cool air guide channel  310  and the second cool air guide channel  320  may be formed on the basis of the positions of the freezing fan module  410  and the ice making fan module  420 , the vertical height of the entire grille panel assembly  1  may be reduced. 
     Further, since the refrigerator may be configured such that cool air is supplied to each position through a plurality of regions  321   a,    321   b,  and  321   c  separately formed in the second cool air guide channel  320 , cool air may be prevented from being supplied to the machine room even if cool air flows backward from the first cool air guide channel  310 . 
     Further, since the refrigerator may be configured such that a portion of the cool air supplied to the ice making compartment  21  is continuously sprayed to the ice maker  12   a  in the freezing compartment  12  through the ice making outlet  171 , ice may be sufficiently frozen in the ice maker  12   a.    
     The refrigerator may not be limited only to the structure of the above implementation. 
     That is, the grille panel assembly of the refrigerator may be implemented in other various structures different from the above implementation. 
     These are described in more detail for each implementation. 
     First,  FIGS. 62 to 66  show a grille panel assembly of a refrigerator according to a second implementation. 
       FIG. 62  is a perspective view of main parts showing the state in which a temperature sensor is installed in a refrigerator according to a second implementation,  FIG. 63  is an enlarged view of main parts showing the state in which the temperature sensor is installed from the front of a grille panel, and  FIG. 64  is an enlarged view of main parts showing the state in which the temperature sensor is installed from the rear of a grille panel. 
     The grille panel assembly may have a structure that enables a temperature sensor  150   a  to be stably mounted without being influenced by a surrounding second evaporator  32  or accumulator  32   c.    
     That is, the temperature sensor  150   a  may be mounted on a mount  150  while being thermally insulated from the second evaporator  32  or the accumulator  32   c  by an insulator  180 . 
     More detailed description is as follows. 
     First, the mount  150  is formed at the grille panel  100 . 
     The mount  150  may be formed at a side of a mounting stage  311  where the channel opening/closing module  330  is formed of portions of the grille panel  100 . 
     That is, by positioning the mount  150  at the same height as the mounting stage  311 , the temperature sensor  150   a  installed on the mount  150  may be maximally spaced apart from the second evaporator  32 . 
     In some examples, a heat blocking plate  33  (see  FIG. 5 ) may be disposed on the front of the second evaporator  32 , so an error in measurement of the temperature sensor  150   a  due to the evaporator  32  may be minimized. 
     The mount  150  may further protrude from the front of the grille panel  100  and may have a mounting groove  151  recessed on the rear thereof. The temperature sensor  150   a  may be accommodated in the mounting groove  151 . 
     A holding stage  152  for retaining the temperature sensor  150   a  may be formed in the mounting groove  151 . That is, the temperature sensor  150   a  may be held and fixed to the holding stage  152 . 
     The holding stage  152  may protrude inward from at least any one wall in the mounting groove  151 . That is, the holding stage  152  may hold at least any one side of the temperature sensor  150   a  so the temperature sensor  150   a  may be stably fixed in the mounting groove  151 . 
     The holding stage  152  may be formed as two or more pieces, may be formed only any one wall in the mounting groove  151 , or may be formed in a plurality of pairs. 
     Exposing holes  153  and  154  may be formed in the mount  150 . That is, the temperature sensor  150   a  in the mounting groove  151  may be exposed to the freezing compartment  12  though the exposing holes  153  and  154 . The exposing holes  153  and  154  may be formed as two or more pieces, as shown in  FIGS. 62 and 63 . 
     The exposing holes  153  and  154  may include a front exposing hole  153  formed through the front of the mount  150 . That is, by forming the front exposing hole  153 , the temperature sensor  150   a  may be exposed into the freezing compartment  12  and may accurately sense the temperature of cool air in the freezing compartment  12 . 
     The exposing holes  154  and  154  may include a side exposing hole  154  formed through both sides of the mount  150 . That is, by additionally forming the side exposing hole  154 , the temperature sensor  150   a  in the mount  150  may accurately recognize the temperature of cool air horizontally flowing in the freezing compartment  12 . 
     A wire accommodation groove  155  (see  FIG. 64 ) may be formed in the mount  150 . 
     The wire accommodation groove  155  may be a groove formed to accommodate a power line  150   b  of the temperature sensor  150   a.  That is, the power line  150   b  may be accommodated and fixed in the wire accommodation groove  155 , thereby preventing disconnection from the temperature sensor  150   a  that may be caused by unexpected movement of the power line  150   b.    
     The wire accommodation groove  155  may extend downward from the bottom of the mounting groove  151  and then may bend to any one side, whereby disconnection of the power line  150   b  from the temperature sensor  150   a  may be prevented and the power line  150   b  may be easily drawn out. 
     Next, the grille panel  100  may have the insulator  180 . 
     The insulator  180  may protect the temperature sensor  150   a  installed on the grille panel  100  and may thermally insulate the portion where the temperature sensor  150   a  is installed from the shroud  200 . 
     That is, since the temperature sensor  150   a  is embedded in the mounting groove  151 , the temperature sensor  150   a  may be exposed rearward through the open portion of the mounting groove  151 . In some examples, the rear of the grille panel  100  may be covered when the shroud  200  to be described below is combined. However, when low-temperature heat generated by the second evaporator  32  positioned behind the shroud  200  transfers to the shroud  200  and the temperature sensor  150   a  is influenced by the low-temperature heat, poor sensing that determines wrong the temperature of the freezing compartment  12  may occur. 
     In particular, the temperature sensor  150   a  may be positioned over the second evaporator  32 , but the accumulator  32   c  may be positioned at a position corresponding to the position of the temperature sensor  150   a  (see  FIG. 15 ) and the accumulator  32   c  may be lower in temperature than that of the freezing compartment  12 . Accordingly, the temperature sensor  150   a  may generate an error when sensing the temperature of the freezing compartment  12  due to the accumulator  32   c.    
     Considering this problem, even if low-temperature heat transfers from the second evaporator  32  to the shroud  200 , the low-temperature heat may be blocked to the temperature sensor  150   a  by the insulator  180  and the low-temperature heat from the accumulator  32   c  may be blocked to the temperature sensor  150   a,  whereby the temperature of the freezing compartment  12  may be more accurately sensed. 
     The insulator  180  may be a plate covering the portion where the mounting groove  151  is formed on the rear of the grille panel  100 . 
     In particular, the insulator  180  may have a larger width than the mounting groove  151 . Accordingly, heat transfer to the surrounding of the temperature sensor  150   a  may be reduced, whereby the reliability of the sensing value by the temperature sensor  150   a  may be improved. 
     The insulator  180  may be integrated with the damper cover  350 . This configuration is shown in  FIGS. 65 and 66 . That is, the damper cover  350  may be installed on the grille panel  100  or the shroud  200 , whereby the insulator  180  may cover the mounting groove  151 . 
     The insulator  180  may be made of the same insulating material as the damper cover  350  (Styrofoam, rubber, silicon, or foaming rubber). 
     If the damper cover  350  is divided forward and rearward, the insulator  180  may be integrated with the front damper cover installed at the grille panel  100  or may be integrated with the rear damper cover installed at the shroud  200 . 
     However, considering that the mounting groove  151  in which the temperature sensor  150   a  is mounted may be formed at the grille panel  100 , the insulator  180  may be integrated with the front damper cover mounted at the grille panel  100 . 
     In particular, the insulator  180  may protrude from a side of the damper cover  350 . 
     That is, the insulator  180  may extend toward a side from the damper cover  350 , whereby the insulator  180  may easily cover the mounting groove  151  of the mount  150  positioned in parallel with the mounting stage  311 . 
     An insulator accommodation groove  156  for accommodating the insulator  180  may be formed at the portion where the mounting groove  151  is formed on the rear of the grille panel  100 . 
     That is, the insulator accommodation groove  156  may be additionally formed to accommodate the insulator  180 , whereby the insulator  180  may be easily installed in position. 
     In some examples, the insulator  180  may be separately provided from the damper cover  350  and may be configured to protect the temperature cover  150   a.  However, if the insulator  180  is separately provided from the damper cover  350 , a separate structure may be provided for fixing the insulator at a specific position until the grille panel  100  and the shroud  200  are completely assembled, and there may be a need for work for the separate structure. 
     Considering this, since the insulator  180  may be integrated with the damper cover  350 , it may be possible to prevent an increase in manufacturing cost and inconvenience for assembly due to separate manufacturing of the insulator  180 . 
     As described above, according to the refrigerator of the second implementation, a temperature sensing error due to the second evaporator  32  and the accumulator  32   c  may be prevented by the insulator  180  covering the temperature sensor  150   a,  whereby it may be possible to accurately control the temperature of the freezing compartment  12 . 
     In particular, according to the refrigerator of the second implementation, since the insulator  180  may be integrated with the damper cover  350 , manufacturing may be easy and assembly may be easy. 
     Next,  FIGS. 67 and 68  show a grille panel assembly of a refrigerator according to a third implementation. 
     It may be exemplified that the grille panel assembly of the refrigerator may further has cuts  115   a  formed at two side walls  114  of the upper cool air discharge port  110 . 
     That is, cool air may be discharged from both sides of the upper cool air discharge port  110 , whereby even if the left-right length of the upper cool air discharge port  110  is smaller than the left-right width of the freezing compartment  12 , cool air may be sufficiently supplied to the rears of both walls in the freezing compartment  12  (adjacent to the grille panel assembly). 
     The cuts  115  may be formed only at portions of the side walls  114 . That is, when the cuts are formed such that the side walls  114  are excessively open (or the side walls are removed), cool air may be directly discharged without being guided by the grille rib at the most end (end grille rib)  111   a,  so the flow speed may rapidly decrease, whereby cool air may not be sufficiently supplied even to the side walls in the freezing compartment  12 . 
     In some cases, when the cuts  115  are excessively large, supporting by the top wall  112  and the bottom wall  113  is unstable, so shaking or damage may occur. 
     Considering this, the cuts  115  may be formed only at portions of the side walls  114  such that cool air passing through the cuts  115  is guided by the grille ribs  111 . 
     The end grille ribs  111   a  most adjacent to the side walls  114  of the grille ribs  111  may be inclined at an angle such that cool air guided by them may flow toward the cuts  115 . 
     The cuts  115  may be formed to the open front of the upper cool air discharge port  110 . That is, the cool air flowing in the upper cool air discharge port  110  may be discharged through the cuts  115  after flowing along the side walls  114  of the upper cool air discharge port  110 . 
     In particular, the cuts  115  may be open to a distance such that the end grille ribs  111   a  may be fully exposed when seen from a side. 
     That is, the open length of the cuts  115  is optimized such that the cool air guided to the end grille ribs  111   a  may be smoothly discharged without interference by the side walls  114 . 
     In some examples, the side walls  114  of the upper cool air discharge port  110  may be formed to have a length such that it may guide cool air to the end grille ribs  111   a.    
     The inclination angle of the end grille ribs  111   a  may be determined in consideration of the left-right length of the upper cool air discharge port, the positions of the end grille ribs  111   a,  the supply position of cool air, etc. 
     Considering that the upper cool air discharge port  110  may be a tube protruding forward, the cool air rotating in the circumferential direction of the freezing fan module  410  may be guided to be discharged forward by the upper cool air discharge port  110 . 
     Accordingly, the cool air guided by the end grille ribs  111   a  of the cool air passing through the grille ribs  111  of the upper cool air discharge port  110  may be supplied to both side walls in the freezing compartment  12  through the cuts  115 , so cool air may be smoothly supplied to both side wall in the freezing compartment  12  in comparison to a structure without the cuts  115 . 
       FIG. 69  shows the flow of cool air when there are the cuts  115 . It may be seen from the figure that the ice maker  12   a  is positioned at the right side, whereby cool air may be sufficiently supplied to the sides of the ice maker  12   a.    
     As a result, according to the refrigerator of the third implementation, the cuts  115  may be formed at the side walls  114  of the upper cool air discharge port  110  and cool air passing through the cuts  115  may be guided by the end grilles  111   a  to be smoothly supplied to both side walls in the freezing compartment  12 . 
     According to the refrigerator of the third implementation, since the grille ribs  111  formed a the upper cool air discharge port  110  may be disposed at an angle considering the flow of cool air flowing in the circumferential direction of the freezing fan module  410 , flow resistance of cool air passing through the upper cool air discharge port  110  may be reduced, whereby cool air may be uniformly supplied throughout the inside of the freezing compartment  12 . 
     Next,  FIGS. 70 to 72  show a grille panel assembly of a refrigerator according to a fourth implementation. 
     According to the refrigerator of the fourth implementation, the suction guides  141  and  142  may be positioned at both sides with respect to the center of the grille panel  100  and may have different sizes. 
     That is, considering that two fan modules  410  and  420  may be provided to the grille panel assembly  1  and the ice making fan module  420  of the two fan modules  410  and  420  may be positioned close to any one side of the grille panel  100 , the pressure distribution when the two fan modules  410  and  420  are simultaneously operated is made such that larger negative pressure may be generated at the side where the ice making fan module  420  is positioned. 
     Accordingly, when the two fan modules  410  and  420  are simultaneously operated, non-uniform flow in which cool air flows much more toward the side where the ice making fan module  420  is positioned than the opposite side may occur. Further, the air guided to pass through the second evaporator  32  by the two suction guides  141  and  142  may be biased to any one side of the second evaporator  32 , so the evaporation performance of the second evaporator  32  may be deteriorated. 
     Considering this, the suction guide (second suction guide) at the opposite side may be formed larger than the suction guide (first suction guide) at the side where the ice making fan module  420  is formed. This configuration is shown in  FIGS. 61 and 62 . 
     That is, the second suction guide  142  may receive much cool air than the first suction guide  141 , so even if the two fan modules  410  and  420  are simultaneously operated, cool air may uniformly flow into the entire second evaporator  32 . 
     The size of the first suction guide  141  may be designed on the basis of the intake amount of cool air when only the freezing fan module  410  is independently operated, and the second suction guide  142  may be designed in a larger size than the first suction guide  141 . 
     As described above, according to the refrigerator of the fourth implementation, since the sizes of the two suction guides  141  and  142  may be different, even if a plurality of fan modules  410  and  420  are provided and simultaneously operated, cool air returning to the second evaporator  32  from the freezing compartment  12  may not be biased to any one side of the second evaporator  32  (the side where the ice making fan module is positioned) and may smoothly exchange heat without deteriorating the evaporation performance while uniformly passing through the entire second evaporator  32 . 
     Not only a refrigerator according to the present disclosure may have the various implementations of the structure described above, but various implementations of the operation control method may be provided. 
     For example, the ice making operation of the operation control method of the refrigerator according to the present disclosure may be performed in various ways, depending on the normal situation and the full-ice situation. That is, the ice making compartment  21  may be controlled in accordance with each situation. 
     In the operation control method according to another implementation, the ice making operation (S 300 ) may include an ice making mode operation (S 310 ) and a full-ice mode operation (S 320 ). 
     The operation for each mode in the ice making operation (S 300 ) is described in more detail with reference to the flowchart of  FIG. 73 . 
     First, the ice making mode operation (S 310 ), which is an operation that may be performed for making ice, may be performed when it corresponds to a performing condition of the ice making operation. That is, when the performing condition of the ice making operation is satisfied by checking the performing condition of the ice making operation (S 301 ), the ice making mode operation (S 310 ) may be performed. 
     The performing condition of the ice making operation, which is a condition requiring ice making, may be the case in which ice making is being performed or the case in which a request for making ice is generated by a user. 
     When the performing condition of the ice making operation is satisfied by checking the performing condition of the ice making operation (S 301 ), whether the ice storage is full with ice may be checked (S 302 ). 
     Whether the ice storage is full with ice may be checked by measuring the height of ice in the ice storage or may be checked by measuring the weigh to the ice storage. 
     When the ice storage is not full with ice by checking whether the ice storage is full with ice (S 302 ), the ice making mode operation (S 310 ) is performed. 
     In the ice making mode operation (S 310 ), the ice making fan  421  may supply cool air to the ice making compartment  21  while operating at a predetermined rotational speed for a predetermined time. 
     That is, when the ice making fan  421  is operated, the air in the freezing compartment  12  may be suctioned to the portion where the second evaporator  32  is positioned and then may pass through the second evaporator  32 . Further, the air may flow into the second cool air guide channel  320  through the second intake hole  220  of the shroud  200  and then may be supplied to the ice making compartment  21  through the ice making compartment cool air duct  51  connected to the second cool air guide channel  320 . 
     In particular, the rotational speed of the ice making fan  421  in the ice making mode operation (S 310 ) may be controlled to be higher than the rotational speed of the freezing fan  411  in the freezing operation (S 100 ) or the switch compartment operation (S 200 ). 
     That is, since the freezing fan  411  may supply cool air to the freezing compartment  12  positioned ahead of the freezing fan  411 , the freezing fan  411  may rotate at a rotational speed where it may provide a large amount of cool air. However, since the ice making compartment  21  may be positioned far in comparison to the freezing compartment  12  or the switch compartment  13 , the ice making fan  421  may forcibly send air up to the ice making compartment  21  while operating at a higher rotational speed than the freezing fan  411 . 
     Accordingly, the wall (or other drinks) in the ice tray in the ice making compartment  21  may be smoothly frozen by the cool air supplied into the ice making compartment  21 . 
     The cool air flowing in the ice making compartment  21  may flow to the ice making compartment return duct  52  and then may be guided to return to the freezing compartment  12  by the ice making compartment return duct  52 . This configuration is shown in  FIGS. 39 and 40 . 
     Thereafter, the cool air returned to the freezing compartment  12  may flow in the freezing compartment  12  and may be guided to return to the air intake side of the second evaporator  32  by the suction guide  140  formed in the grille panel  100 . 
     When the ice making mode operation (S 320 ) is performed, the air in the freezing compartment  12  may flow backward to the second cool air guide channel  320 . 
     That is, when the freezing fan  411  is not operated and only the ice making fan  421  is operated, a pressure difference is generated between the first cool air guide channel  310  and the second cool air guide channel, so the cool air in the freezing compartment may pass backward through the first cool air guide channel  310  and the first intake hole  210  and may flow into the second intake hole  220  and the second cool air guide channel  320 . 
     However, the cool air flowing into the second cool air guide channel  320  in the ice making mode operation (S 320 ) may flow into the first region  321   a,  the second region  321   b,  and the third region  321   c  of the second cool air guide channel and then a portion of the cool air may be supplied to the first cool air guide channel  310 . 
     That is, the cool air flowing in the first region  321   a  by the operation of the ice making fan  421  may be supplied to the first cool air guide channel  310  through the first communicating channel  610 , the cool air blown to the second region  321   b  may be supplied to the first cool air guide channel  310  through the second communicating channel  620 , and the cool air blown to the third region  321   c  may be supplied to the portion connected with the ice making compartment cool air duct  51 . 
     Accordingly, the inside of the first cool air guide channel  310  (or the freezing compartment) may be maintained at pressure similar to the pressure of the ice making compartment  21  by the cool air supplied from the second cool air guide channel  320 . That is, since the pressures of the freezing compartment  12  and the ice making compartment  21  are substantially equilibrium, even if only the ice making fan  421  is operated for the ice making operation, the cool air in the freezing compartment  12  may be prevented (minimized) from passing backward through the first cool air guide channel  310  and the first intake hole  210  and flowing into the second intake hole  220  and the channel opening/closing module  330 . 
     While the ice making mode operation (S 320 ) described above is performed, the controller may continuously check the temperature of the ice making compartment  21  and the cool air supply time. 
     In this case, when it is determined that the temperature in the ice making compartment  21  is lower than a predetermined temperature and cool air has been supplied for a predetermined time, the controller may control the ice formed in the ice tray to be supplied to the ice storage. That is, when the end condition of the ice making operation is checked (S 303 ) and the end condition of the ice making operation is satisfied, the ice making operation may be controlled to be ended (S 304 ). 
     The controller may make new water be supplied to the ice tray and then may repeat the ice making mode operation for a predetermined time. 
     If the ice storage is full with the ice supplied therein, the controller recognizing this fact may end the ice making mode operation (S 310 ) and may perform the full-ice mode operation (S 320 ). 
     It may be possible to check whether the ice storage is full with ice in various ways. For example, it may be possible to check the full-ice state on the basis of the height of the storage ice or the weight of the ice storage. 
     When the ice making mode operation (S 310 ) is ended and the full-ice mode operation (S 320 ) is performed, the controller may control the ice making fan  421  to operate with the operation of the freezing fan  411 . 
     That is, when the freezing fan  411  is not operated and the compressor is also not operated, the ice making fan  421  may also be controlled not to operate. When the freezing fan  411  is operated and the compressor is also operated, the ice making fan  421  may also be controlled to operate. 
     The full-ice mode operation (S 320 ) has only to be maintained (maintained at substantially −3° C. or less) such that the ice in the ice storage is not melted, so when the compressor is operated only for the full-ice mode operation (S 320 ), excessive power may be unavoidably consumed to keep the ice. 
     Accordingly, by controlling the ice making fan  421  to operate when the compressor is operated by operation of the freezing fan, it may be possible to reduce the entire power consumption. 
     The rotational speed of the ice making fan  421  in the full-ice mode operation (S 320 ) may be controlled lower than the rotational speed of the ice making fan  421  in the ice making mode operation (S 310 ). 
     That is, it may be possible to further reduce the power consumption by enabling the full-ice mode operation (S 320 ) to be performed with lower efficiency than the ice making mode operation (S 310 ). 
     In some examples, the rotational speed of the ice making fan  421  in the full-ice mode operation (S 320 ) may be controlled to be higher than the rotational speed of the freezing fan  411  in the freezing operation (S 100 ). This may be for enabling cool air to be smoothly supplied up to the ice making compartment. 
     The operation of the ice making fan  421  in the full-ice mode may be selectively performed even in accordance with the temperature condition of the ice making compartment  21  in addition to whether the freezing fan  411  is operated. 
     That is, when the temperature of the ice making compartment  21  increases up to a predetermined temperature range (a temperature that may melt ice, for example, −3° C. or higher), the compressor may be operated and the ice making fan  421  may be operated regardless of whether the freezing fan  411  is operated in order to reduce the temperature of the ice making compartment  21 . 
     The controller may check whether the temperature reaches a predetermined temperature set as the ice making operation end condition on the basis of the temperature of the ice making compartment  21  (S 303 ), and when the it corresponds to the ice making operation end condition, the controller may stop supplying cool air to the ice making compartment  21  by stopping the operation of the ice making fan  421  (S 304 ). 
     Accordingly, the temperature in the ice making compartment  21  may be controlled by repeated circulation of the air (cool air). 
     As described above, the operation control method in the ice making operation according to another implementation may separately control the ice making operation into the ice making mode operation (S 310 ) and the full-ice mode operation (S 320 ), whereby the ice making compartment  21  may be controlled for each situation. 
     In particular, the operation control method of the refrigerator may make the full-ice mode operation (S 320 ) be performed with lower efficiency than the ice making mode operation (S 310 ), whereby it may be possible to remarkably reduce power consumption. 
     As described above, a refrigerator may be implemented in various ways, as in the implementations described above, and may be implemented in other ways not shown.