Patent Publication Number: US-11047618-B2

Title: Refrigerator

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application is a continuation of U.S. application Ser. No. 16/230,455, filed on Dec. 21, 2018, which claims priority under 35 U.S.C. 119 and 35 U.S.C. 365 to Korean Patent Application No. 10-2018-0034718, filed on Mar. 26, 2018, which is hereby incorporated by reference in its entirety. 
    
    
     BACKGROUND 
     The present disclosure relates to a refrigerator. 
     In general, refrigerators are home appliances for storing foods at a low temperature in a storage space that is covered by a door. For this, refrigerators cool the inside of the storage space by using cool air generated by being heat-exchanged with a refrigerant circulated through a refrigeration cycle to store foods in an optimum state. 
     In recent years, refrigerators have become increasingly multi-functional with changes of dietary lives and gentrification of products, and refrigerators having various structures and convenience devices for convenience of users and for efficient use of internal spaces have been released. 
     The storage space of the refrigerator may be opened/closed by the door. Also, refrigerators may be classified into various types according to an arranged configuration of the storage space and a structure of the door for opening and closing the storage space. 
     The refrigerator door may be classified into a rotation-type door that opens and closes a storage space through rotation thereof and a drawer door that is inserted and withdrawn in a drawer type. 
     Also, the drawer door is often disposed in a lower region of the refrigerator. Thus, when the drawer-type door is disposed in the lower region of the refrigerator, a user has to turn its back to take out a basket or foods in the drawer door. If the basket or the foods are heavy, the user may feel inconvenient to use the basket or may be injured. 
     In order to solve such a limitation, various structures are being developed in which the drawer door is capable of being elevated. 
     Representatively, a structure in which a plurality of elevation rails and an elevation frame on which a basket is placed are provided on a rear surface of a draw-out door, and the basket is elevated by driving of a motor and a driving arm is closed in Koran Patent Publication No. 10-2006-0006321. 
     However, in such a structure, since the entire basket is elevated, when the basket is elevated, stability may be deteriorated. If a left and right balance is not balanced, the elevation operation may not be performed properly, or the basket may be damaged. 
     Also, in order to elevate the basket, the entire basket have to be withdrawn to the outside of the refrigerator. In the structure in which the entire basket is withdrawn, the rail structure connecting the door and the refrigerator body may be unstable, and durability may be deteriorated. Particularly, this limitation may occur more severely when heavy components are concentrated on the door for the elevation. 
     Also, the structure for elevating the basket may be exposed to both the rear surface of the door and the lower side of the basket, thereby causing a limitation in safety of the user when the door is inserted and withdrawn or elevated. 
     SUMMARY 
     Embodiments provide a refrigerator in which a portion within a drawer door, which is withdrawn in a drawer type, is elevated to improve user&#39;s convenience in use. 
     Embodiments also provide a refrigerator in which all electrical devices providing power for elevation are provided in a front panel door part of a drawer door, and the front panel door part and the drawer part are separable to improve safety and serviceability. 
     Embodiments also provide a refrigerator in which an elevatable support member is disposed in a drawer part, and an elevation assembly provided in a door operates to elevate the support member within the drawer part. 
     Embodiments also provide a refrigerator in which a support member within a drawer part is elevated in a state in which a portion of a front part of an entire drawer part is withdrawn to the outside of a cabinet, and a portion of a rear part is disposed in the cabinet. 
     Embodiments also provide a refrigerator in which a path of an elevation member that is inserted into a drawer part and elevated is covered to improve an outer appearance and operation reliability. 
     Embodiments also provide a refrigerator in which an elevation assembly that is capable of covering a portion of a drawer door is prevented from being exposed. 
     Embodiments also provide a refrigerator in which an elevation member of an elevation assembly is easily separated according to whether an elevation function is used to improve convenience in use and space utilization. 
     According to one aspect of the subject matter described in this application, a refrigerator includes: a cabinet that defines an upper storage space and a lower storage space; a front panel door part configured to open and close at least a portion of the lower storage space; a drawer part connected to the front panel door part and configured to insert into and withdraw from the lower storage space together with the front panel door part; a support member located at the drawer part and configured to seat an object stored in the drawer part; and an elevation assembly located at the front panel door part and configured to elevate the support member relative to the drawer part. The elevation assembly includes: at least one elevation member that extends from the front panel door part to the drawer part, that is configured to pass through at least a portion of the drawer part, and that is located vertically below the support member, with the at least one elevation member being configured to support the support member; and a driving device that is located in the front panel door part, that is configured to provide power to the at least one elevation member, and that is configured to cause a vertical movement of the at least one elevation member relative to the drawer part. 
     Implementations according to this aspect may include one or more of the following features. For example, the drawer part may define: a front space disposed forward in a direction in which the drawer part is configured to withdraw from the lower storage space of the cabinet; and a rear space disposed rearward of the front space, where the support member is arranged in the front space. In some examples, the at least one elevation member is configured to pass through a front surface of the drawer part and to extend to an inside of the front space of the drawer part. 
     In some examples, the elevation assembly is configured to perform the vertical movement of the at least one elevation member in a state in which the front space of the drawer part is completely exposed to an outside of the cabinet. In some implementations, the drawer part includes a drawer cover configured to partition an inner space of the drawer part into the front space and the rear space, with the drawer cover being configured to cover the rear space. 
     In some implementations, the at least one elevation member includes a pair of elevation members spaced apart from each other in a lateral direction, where the drawer part defines a pair of openings at a front surface of the drawer part at positions corresponding to the pair of elevation members, the pair of openings extending in a vertical direction to allow the vertical movement of the pair of elevation members. In some implementations, the front panel door part defines a recessed space at a rear surface of the front panel door part, with the recessed space being configured to accommodate the elevation assembly therein, where a front surface of the drawer part is configured to cover at least a portion of the elevation assembly. 
     In some implementations, the elevation assembly further includes: a frame configured to be fixed to a rear surface of the front panel door part, with the frame defining a frame space configured to accommodate the driving device therein; a pair of elevation shafts respectively located at sides of the frame space and configured to be rotated by the driving device; and an elevation block that defines openings respectively penetrated by the pair of elevation shafts, that defines a screw thread at each of openings of the elevation block, and that is configured to move in a vertical direction along the pair of elevation shafts based on rotation of the pair of elevation shafts. The at least one elevation member may be coupled to the elevation block. 
     In some examples, the driving device includes: an elevation motor located between the pair of elevation shafts; and a gear assembly including a plurality of gears that are configured to connect the elevation motor to the pair of elevation shafts and that allow the pair of elevation shafts to simultaneously rotate at a same rotation rate. In some examples, the elevation motor is located at a bottom surface of an inside of the frame, the elevation motor including a rotation shaft that passes through the frame, where the gear assembly is arranged at a bottom surface of an outside of the frame and connected to the rotation shaft of the elevation motor. 
     In some examples, the elevation block defines a motor groove recessed from a surface of the elevation block and configured to receive the elevation motor based on the elevation block moving downward in the vertical direction along the pair of elevation shafts. In some examples, the refrigerator further includes at least one guide device located at a front surface of the drawer part, where the at least one guide device defines at least one guide opening configured to receive the at least one elevation member and to guide the vertical movement of the at least one elevation member in a state in which the elevation member passes through the at least one guide opening. 
     In some implementations, each of the at least one guide device includes: a guide frame located in a drawer opening defined at the front surface of the drawer part, the guide frame defining the guide opening; a plurality of shutters that are arranged in the guide opening in a vertical direction and that are configured to cover the guide opening; and a shutter guide part located at each of both left and right surfaces of the guide opening and configured to guide the plurality of shutters to move up and down along the vertical direction. The at least one elevation member may be configured to: pass through the at least one guide opening from a lower side of the plurality of shutters; and based on the at least one elevation member moving in an upward direction, push the lower side of the plurality of shutters in the upward direction to allow the plurality of shutters to move in the upward direction. The plurality of shutters may be configured to move in a downward direction by a weight of the plurality of shutters based on the at least one elevation member moving in the downward direction. 
     In some examples, the shutter guide part includes a plurality of guides that extend in the vertical direction, that define recesses configured to accommodate ends of the plurality of shutters, and that define a moving path of the plurality of shutters, where a number of the plurality of guides correspond to a number of the plurality of shutters. In these examples, at least portions of the plurality of guides are spaced apart from each other in a front-rear direction, and the plurality of shutters are configured to overlap each other in the front-rear direction based on the plurality of shutters moving upward. 
     In some implementations, the each of the at least one guide device further includes a cover part located vertically above the guide opening and configured to cover all of the plurality of shutters that overlap each other in a state in which the plurality of shutters have moved upward, where each of the plurality of guides of the shutter guide part extends from a front side of the cover part to an upper end of the cover part. 
     In some examples, each of the plurality of shutters includes: upper protrusions that protrude laterally outward from upper ends of both sides of the shutter; and lower protrusions that protrude laterally outward from lower ends of both sides of the shutter. In these examples, each of the plurality of guides of the shutter guide part includes: upper grooves configured to receive the upper protrusions of the shutter, respectively, with the upper grooves extending in an inclined direction with respect to the vertical direction, and lower grooves configured to receive the lower protrusions of the shutter, respectively, with the lower grooves extending in the inclined direction. In these examples, outer surfaces of the plurality of shutters may be configured to define one plane in a state in which the plurality of shutters are positioned at a lowermost position based on the upper protrusions being inserted into the upper grooves and the lower protrusions being inserted into the lower grooves. 
     In some implementations, the guide opening is configured to be closed in the state in the plurality of shutters are positioned at the lowermost position, where an inner surface of the drawer part is on the one plane defined by the outer surfaces of the plurality of shutters in a state in which the guide opening is closed. In some examples, the plurality of shutters include: a lower shutter disposed at a lower side; and an upper shutter disposed at an upper side, where the lower shutter includes a shutter bent part that is bent from an upper end of the lower shutter and that is configured to seat a lower end of the upper shutter. 
     In some implementations, the drawer part includes a plurality of plates that define an inner surface of the drawer part, each of the plurality of plates being made of a metal material, where each of the plurality of shutters is made of the metal material. In some implementations, the support member has a plate shape and a size corresponding to an interior of the front space of the drawer part. 
     The details of one or more embodiments are set forth in the accompanying drawings and the description below. Other features will be apparent from the description and drawings, and from the claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a front view of a refrigerator according to an embodiment. 
         FIG. 2  is a perspective view illustrating a drawer door of the refrigerator according to an embodiment. 
         FIG. 3  is a perspective view illustrating a state in which a container of the drawer door is separated. 
         FIG. 4  is an exploded perspective view illustrating a state in which the drawer door is separated when viewed from a rear side. 
         FIG. 5  is an exploded perspective view illustrating the state in which the drawer door is separated when viewed from a front side. 
         FIG. 6  is a perspective view of an elevation assembly according to an embodiment. 
         FIG. 7  is a perspective view illustrating a state in which the elevation assembly ascends. 
         FIG. 8  is an exploded perspective view of a drawer part. 
         FIG. 9  is an exploded perspective view of a guide device according to an embodiment. 
         FIG. 10  is a perspective view illustrating a guide frame of the guide device. 
         FIG. 11  is a longitudinal cross-sectional view of the guide frame. 
         FIG. 12A  is a perspective view illustrating a state in which the guide device is completely covered. 
         FIG. 12B  is a perspective view illustrating a state in which the guide device is partially covered. 
         FIG. 12C  is a perspective view illustrating a state in which the guide device is completely opened. 
         FIG. 13  is a perspective view illustrating a state of the guide device when the elevation assembly is disposed at the lowermost side. 
         FIG. 14  is a perspective view illustrating a state of the guide device when the elevation assembly is disposed at the uppermost side. 
         FIG. 15  is a view illustrating a state in which the drawer door is closed. 
         FIG. 16  is a partial perspective view illustrating a state in which the drawer door is withdrawn to be elevated. 
         FIG. 17  is a cross-sectional view illustrating a state in which the drawer door is withdrawn. 
         FIG. 18  is a partial perspective view illustrating a state in which the drawer door ascends. 
         FIG. 19  is a cross-sectional view illustrating the state in which the drawer door ascends. 
         FIG. 20  is a perspective view illustrating a state in which a drawer door of a refrigerator ascends according to another embodiment. 
         FIG. 21  is a perspective view illustrating a state in which a drawer door of a refrigerator ascends according to another embodiment. 
         FIG. 22  is a perspective view illustrating a state in which a drawer door of a refrigerator ascends according to another embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, detailed embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. However, the scope of the present disclosure is not limited to proposed embodiments, and other regressive inventions or other embodiments included in the scope of the spirits of the present disclosure may be easily proposed through addition, change, deletion, and the like of other elements. 
       FIG. 1  is a front view of a refrigerator according to an embodiment. 
     As illustrated in the drawing, the refrigerator  1  may have an outer appearance that is defined by a cabinet  10  defining a storage space and a door  2  covering an opened front surface of the cabinet  10 . 
     The storage space within the storage space may be divided into a plurality of spaces. For example, an upper space of the cabinet  10  may be provided as a refrigerating compartment, and a lower space of the cabinet  10  may be provided as a freezing compartment. Each of the upper space and the lower space may be provided as an independent space that is maintained at a different temperature, except for the refrigerating compartment and the freezing compartment. The upper space and the lower space may be called an upper storage space and a lower storage space. 
     The door  2  may be constituted by a rotation door  20  opening and closing the upper storage space through rotation thereof and a drawer door  30  opening and closing the lower storage space by being inserted or withdrawn in a drawer type. The lower space may be vertically divided again. The drawer door  30  may be constituted by an upper drawer door  30  and a lower drawer door  30 . Also, an outer appearance of each of the rotation door  20  and the drawer door  30  may be made of a metal material and be exposed to the front side. 
     Although the refrigerator in which all of the rotation door  20  and the drawer door  30  are provided is described, the present disclosure is not limited thereto. For example, the present disclosure may be applied to all refrigerators including a door that is inserted and withdrawn in the drawer type. 
     A display  21  may be disposed on one side of a front surface of the rotation door  20 . The display  21  may have a liquid crystal display structure or a multi-segment display such as a seven-segment display or an “88” shape segment structure. Also, when the outer appearance of the door  2  is made of the metal material, a plurality of fine holes are punched in the display  21  to display information by using light passing therethrough. 
     Also, a manipulation part  22  that is capable of manipulating automatic rotation or withdrawal of the upper door  2  or the lower door  2  may be provided on one side of the rotation door  20 . The manipulation part may be integrated with the display  21  and may operate in a touch manner or a button manner. The manipulation part  22  may input an overall operation of the refrigerator  1  and manipulate an insertion and withdrawal of the drawer door  30  or an elevation of a support member  35  within the drawer door. 
     A manipulation part  301  may also be provided on the drawer door  30 . The manipulation part  301  may be disposed on one side of the drawer door  30  that is disposed at the lowermost portion of the drawer door  30 . The manipulation part  301  may operate in a touch or button manner. The manipulation part  301  may be provided as a sensor detecting proximity or movement of a user or provided as an input unit that operates by a user&#39;s motion or voice. 
     As illustrated in the drawing, a manipulation device  302  may be disposed on a lower end of the lower drawer door  30  to illuminate an image on a bottom surface and thereby to output a virtual switch and to input an operation in such a manner that the user approaches a corresponding area. 
     The lower drawer door  30  may be automatically inserted and withdrawn according to the manipulation of the manipulation part  301 . Also, a food or container within the lower drawer door  30  may be elevated in a state in which the drawer door  30  is withdrawn by the manipulation of the manipulation part  301 . 
     That is, the automatic insertion and withdrawal and/or automatic elevation of the lower drawer door  30  may be performed by at least one of a plurality of manipulation devices  22 ,  301 , and  302 . As necessary, only one of the plurality of manipulation devices  22 ,  301 , and  302  may be provided. 
     Hereinafter, the lower drawer door  30  will be described in more detail, and also, the lower drawer door  30  will be called a drawer door unless otherwise specified. 
       FIG. 2  is a perspective view of the drawer door according to an embodiment. Also,  FIG. 3  is a perspective view illustrating a state in which the container of the drawer door is separated. 
     As illustrated in the drawings, the drawer door  30  may include a front panel door part  31  opening and closing the storage space and a drawer part  32  coupled to a rear surface of the front panel door part  31  and inserted and withdrawn together with the front panel door part  31 . 
     The front panel door part  31  may be exposed to the outside of the cabinet  10  to define an outer appearance of the refrigerator  1 , and the drawer part  32  may be disposed inside the cabinet  10  to define an storage space. Also, the front panel door part  31  and the drawer part  32  may be coupled to each other and inserted and withdrawn forward and backward together with each other. 
     The drawer part  32  may be disposed on the rear surface of the front panel door part  31  to define a space in which the food or container to be stored is accommodated. The inside of the drawer part  32  may have a box shape having an opened top surface. 
     The inner surface and the outer surface of the drawer part  32  may be defined by a plurality of plates made of a metal material. Each of the plurality of plates may be made of a metal material such as stainless steel. Thus, the outer appearance may be seen as being clean and luxurious, and the entire inside of the drawer part  32  may be uniformly cooled through heat transfer by surrounding cold air. 
     In the state in which the drawer door  30  is inserted, a machine room  3  in which a compressor and a condenser constituting a refrigeration cycle are provided may be disposed behind the drawer door  30 . Thus, a rear end of the drawer part  32  may have a shape of which an upper end further protrudes from a lower end, and an inclined surface  321  may be provided on a rear surface of the drawer part  32 . 
     Also, a draw-out rail  33  guiding the insertion and withdrawal of the drawer door  30  may be provided on each of both side surfaces of the drawer part  32 . The drawer door  30  may be mounted to be inserted into or withdrawn from the cabinet  10  by the draw-out rail  33 . The draw-out rail  33  may have a rail structure that is capable of extending in multistage. 
     Also, the draw-out rail  33  may be provided on a lower end of each of both the side surfaces of the drawer part  32 . Thus, it may be understood that the draw-out rail  33  is disposed on the bottom surface of the drawer part  32 . Thus, the draw-out rail  33  may be provided on the bottom surface of the drawer part  32  and called an under rail. 
     A draw-out rack  34  may be disposed on the bottom surface of the drawer part  32 . The draw-out rack  34  may be disposed on each of both sides and be interlocked with an operation of a draw-out motor  14  mounted on the cabinet  10  to automatically insert and withdraw the drawer door  30 . That is, when an operation is inputted into the manipulation parts  22  and  301 , the draw-out motor (see reference numeral  14  of  FIG. 17 ) may be driven to insert and withdraw the drawer door  30  according to movement of the draw-out rack  34 . Here, the drawer door  30  may be stably inserted and withdrawn by the draw-out rail  33 . 
     The draw-out rack  34  may not be provided on the drawer part  32 . Here, the user may hold a side of the front panel door part  31  to push and pull the front panel door part  31  so that the drawer door  30  is directly inserted and withdrawn. 
     The inside of the drawer part  32  may be divided into a front space S 1  and a rear space S 2 . The support member  35  that is vertically elevated and a container seated on the support member  35  to be elevated together with the support member  35  may be disposed in the front space S 1 . Although the container  36  is illustrated in the form of a basket having an opened upper portion, the container  36  may have a closed box structure such as a kimchi box. Also, a plurality of containers  36  may be stacked or arranged in parallel to each other. 
     Also, when the drawer door  30  is withdrawn, the entire drawer part  32  may not be withdrawn to the outside of the storage space due to a limitation in draw-out distance of the drawer door  30 . That is, at least the front space S 1  is withdrawn to the outside of the storage space, and the whole or a portion of the rear space S 2  is disposed inside the storage space within the cabinet  10 . 
     As the draw-out distance increases, the drawer door  30  may have large moment applied to the drawer door  30  in a draw-out state, which makes it difficult to maintain a stable state, and the draw-out rail  33  or the draw-out rack  34  may be deformed or damaged. Particularly, such a limitation may become more serious in a state in which additional devices for elevation are provided in the drawer door  30 . 
     Thus, only the front space of the drawer part  32  that is necessary for elevating the support member  35  may be exposed to the outside of the cabinet  10  so that the drawer part  32  is withdrawn by a minimum distance at which the support member  35  is elevatable. 
     A support member  35  is accommodated in the front space S 1  so that o that the food or the container  36  seated on the support member  35  is elevated together with the support member  35  is accommodated in the front member  35  while the support member  35  is elevated. The support member  35  may be a portion on which the food or container to be elevated is substantially seated and thus be called a seating member. 
     The support member  35  may be elevated by an elevation assembly  40  provided in the drawer door  30 . The elevation assembly  40  for elevating the support member  35  may be mounted substantially on the front panel door part  31  and may not be exposed to the outside in the state in which the drawer door  30  is assembled. A more detailed structure of the elevation assembly  40  will be described below. 
     A separate drawer cover  37  may be provided in the rear space S 2 . The front space S 1  and the rear space S 2  may be partitioned by the drawer cover  37 . In a state in which the drawer cover  37  is mounted, front and top surfaces of the rear space S 2  may be covered and may not be used. However, when the drawer cover  37  is separated, the user may be accessible to the rear space S 2 , and thus, foods may be easily accommodated in the rear space S 2 . To utilize the rear space S 2 , a separate pocket or a container corresponding to the shape of the rear space may be disposed in the rear space S 2 . 
       FIG. 4  is an exploded perspective view illustrating a state in which the drawer door is separated when viewed from a rear side. Also,  FIG. 5  is an exploded perspective view illustrating the state in which the drawer door is separated when viewed from a front side. 
     As illustrated in the drawings, the front panel door part  31  and the drawer part  32  constituting the drawer door  30  may be coupled to be separated from each other. Thus, assembling workability and serviceability may be improved through the separable structure of the front panel door part  31  and the drawer part  32 . 
     A rear surface of the front panel door part  31  and a front surface of the drawer part  32  may be coupled to each other. The elevation assembly disposed on a rear surface of the front panel door part  31  may be configured to be covered by the coupling of the drawer part  32 . The elevation assembly  40  may be separated or coupled to the front panel door part  31  when the front panel door part  31  and the drawer part  32  are separated from or coupled to each other. Particularly, all the electrical devices including the elevation assembly  40  for providing power for elevating the support member  35  may be disposed in the front panel door part. Thus, the drawer part  32  and the front panel door part  31  may be separated from each other to clean the inside of the drawer part  32  or to maintain the elevation assembly  40 . The drawer part  32  and the front panel door part  31  may be separated from each other, the inside of the drawer part  32  may be cleaned more safely, and the maintenance of the elevation assembly  40  may be easily performed. 
     The outer appearance of the front panel door part  31  may be defined by an outer case  311  defining a front surface and a portion of a circumferential surface and a door liner  318  defining a rear surface. Also, the inside of the front panel door part  31  may be filled with a heat insulating material, and a space through which at least a portion of the elevation assembly  40  is mounted may be provided. 
     The outer case  311  may be formed by bending a plate-shaped metal material, and an inclined part  311   a  may be provided on a lower end of a front surface of the outer case  311 . A manipulation device hole  311   b  is defined in one side of the inclined part  311   a , and the manipulation device  302  for detecting an output of a virtual switch and user&#39;s manipulation may be mounted in the manipulation device hole  311   b . The manipulation device  302  may be constituted by a projector light that outputs an image and a proximity sensor. Also, a manipulation part bracket for the mounting of the manipulation device  302  and an arrangement of a line connected to electrical components within the front panel door part  31  may be provided in the lower deco  313 . 
     The door liner  318  may be made of a plastic material through injection molding and may have a space recessed in a corresponding shape so that the elevation assembly  40  is mounted. That is, the elevation assembly  40  may be configured so as not to interfere with the drawer part  32  when the front panel door part  31  and the drawer part  32  are coupled to each other in the state in which the front panel door part  31  is mounted in the recessed space. 
     In detail, all of the components mounted on the frame  41  in addition to the frame  41  of the elevation assembly  40  may be inserted into the space recessed in the rear surface of the front panel door part  31 , and only the elevation member  45  for supporting the support member  35  may extend to pass through the drawer part  32  and be disposed in the front space inside the drawer part  32 . Here, the rest constituents of the elevation assembly  40  mounted to the front panel door part  31  except for the elevation member  45  may be disposed on the same plane as the rear surface of the front panel door part  31  or inside the front panel door part  31  so as to be prevented from interfering with the drawer part  32 . The front panel door part  31  may further include a separate cover for covering exposure of the elevation assembly  40  in the state in which the elevation assembly  40  is mounted. 
     A door gasket  317  may be provided around the rear surface of the front panel door part  31 . The door gasket  317  contacts the front end of the cabinet  10  when the drawer door  30  is closed so that the inside of the drawer door  30  is sealed. 
     A pair of door frames  316  may be disposed on both left and right sides on the rear surface of the front panel door part  31 . The door frames  316  may connect the front panel door part  31  to the drawer part  32  so that the drawer part  32  is maintained in the state of being coupled to the front panel door part  31 . Thus, the front panel door part  31  and the drawer part  32  may be inserted and withdrawn together in the state of being coupled to each other. 
     The drawer part  32  may be coupled to the rear surface of the front panel door part  31 , and the front surface of the drawer part  32  may cover the elevation assembly  40  mounted on the front panel door part  31 . The drawer part  32  may have an opened top surface, and the container and the support member  35  may be disposed in the front space S 1  inside the drawer part  32 . The door cover  37  may be provided in the rear space S 2 . 
     The front surface of the drawer part  32  contacts the rear surface of the front panel door part  31  and the elevation assembly  40 . Also, a guide device  50  through which the elevation member  45  of the elevation assembly  40  passes may be provided on the front surface of the drawer part  32 . 
     The guide device  50  may be disposed on each of both left and right sides of the front surface of the drawer part  32  and may have a size corresponding to a corresponding position so as to be penetrated by the elevation member  45 . Also, the guide device  50  may have a length corresponding to at least a stroke of the elevation member  45  for guiding the elevation member  45  that moves vertically. A structure of the guide device  50  will be described below in more detail. 
       FIG. 6  is a perspective view of the elevation assembly according to an embodiment. Also,  FIG. 7  is a perspective view illustrating a state in which the elevation assembly ascends. 
     As illustrated in the drawings, the elevation assembly  40  may include a frame  41 , a driving device  42 , an elevation shaft  43 , an elevation block  44 , and an elevation member  45 . 
     The frame  41  may have a rectangular frame shape, and a plurality of frame mounting parts  411  may be disposed around the frame  41 . Also, a coupling member such as a screw may be coupled to each of the frame mounting parts  411  so that the frame  41  is fixedly mounted on the rear surface of the front panel door part  31 . 
     Also, the elevation shaft  43  may be provided on both left and right sides of the opened inside of the frame  41 . Upper and lower ends of the elevation shaft  43  may be rotatably fixed to the frame  41 . A screw thread  431  may be formed on an outer surface of the elevation shaft  43 . Thus, the elevation block  44  may vertically move along the elevation shaft  43  when the elevation shaft  43  rotates. 
     The driving device  42  may be provided on a bottom surface of the frame  41 . The driving device  42  includes an elevation motor  421  for providing power for rotation of the elevation shaft  43 , a plurality of gear assemblies  423  rotating by the elevation motor  421 , and a gear case  422  that accommodates the gear assemblies  423 . 
     In detail, the elevation motor  421  may be disposed at a center of the bottom surface of the frame  41  and may be disposed on the opened inner side of the frame  41 . Also, the rotation shaft of the elevation motor  421  may be coupled to the gear on the gear case  422  by passing through the bottom surface of the frame  41 . The elevation motor  421  may be accommodated in a separate motor case, and the motor case may be integrated with the gear case  422 . 
     The gear case  422  may be mounted outside the bottom surface of the frame  41 . The plurality of gears constituting the gear assembly  423  may be coupled to the inside of the gear case  422  and may be coupled to the rotation shaft of the elevation motor  421  disposed at the center. 
     Also, the gear assembly  423  provided in the gear case  422  may be configured to transmit the rotation of the elevation motor to the elevation shaft. Here, the gear assembly  423  may transmit the rotation of the elevation motor  421  disposed at the center to the elevation shaft  43  disposed on each of both the sides by the same size so that the elevation block  44  is not inclined or eccentric, and thus, both sides may vertically move in a horizontal state. 
     For this, the plurality of gears of the gear assembly  423  may be adjusted in number, size, and gear ratio so that the rotation force having the same magnitude and direction is transmitted to the elevation motor  421  when the elevation motor  421  rotates. Alternatively, when the directions of the screw threads of the elevation shaft  43  itself are reversed, the arrangement of the gears in the gear case  422  may be changed accordingly. 
     The elevation block  44  may be provided on the inner side of the frame  41  and may be configured to pass through the elevation shaft  43  disposed on both sides of the frame  41 . The elevation block  44  may have a length that is enough to be accommodated inside the frame  41  and simultaneously to allow the pair of elevation shafts  43  to pass therethrough. 
     For this, a shaft hole  441  may be defined in each of both sides of the elevation block  44 . The shaft hole  441  may be defined to pass through the elevation block  44  in the vertical direction so that the elevation shaft passes therethrough. Also, a screw thread corresponding to the screw thread  431  of the elevation shaft may be disposed on an inner surface of the shaft hole  441 . When the elevation shaft  43  rotate, the elevation block  44  vertically moves along the elevation shaft  43 . 
     Also, a motor groove  442  may be defined in the center of the elevation block  44 . The motor groove  442  may be recessed in a shape corresponding to the shape of the elevation motor  421  so that the elevation block  44  is prevented from interfering by the elevation motor  421  even when the elevation block  44  vertically moves. The elevation motor  421  may be disposed inside the frame  41  by the motor groove  442  so as not to affect the elevation of the elevation block  44 . Thus, the elevation assembly  40  may be compact in size and configured to be mounted within the front panel door part  31 . 
     Also, an elevation member mounting part  443  may be further disposed on each of both sides of the elevation block  44 . The elevation member mounting part  443  is for mounting the elevation member  45  and may be recessed in a top surface and front surface of the elevation block  44 . The elevation member  45  may have a shape corresponding to an elevation member coupling part  451  disposed at a rear end of the elevation member  45 . That is, the elevation member mounting part  443  and the elevation member coupling part  451  may have corresponding protrusion and groove shapes so that the elevation member  45  is easily detached through the vertical movement thereof, and in the state in which the elevation member  45  is mounted, the rigid fixed state may be maintained. 
     The elevation member  45  may be seated from an upper side to a lower side of the elevation block  44  and may be detached from the elevation block  44  when the elevation member  45  is lifted upward. Thus, if the elevation function is not required for the drawer part  32 , the elevation member  45  may be separated to secure a space inside the drawer part  32 . In order to use the elevation function for the drawer part  32 , only the elevation member  45  may be easily separated without separating the entire elevation assembly  40 . 
     The elevation member  45  may be mounted on the elevation block  44  to extend backward. A width of the elevation member  45  may be smaller than that of the guide hole  511  of the guide device  50 . Thus, the elevation member  45  may be detached through the guide hole  511  or may vertically move along the guide hole  511 . 
     Also, the pair of elevation members  45  may extend backward and be disposed inside the front space S 1  inside the drawer part  32 . And, the elevation member  45  may extend to the rear end of the support member  35  so as to support the support member  35  from the lower side. 
       FIG. 8  is an exploded perspective view of the drawer part. 
     As illustrated in the drawings, the drawer part  32  may include a drawer body  38  defining an entire shape of the drawer part  32 , the guide device  50  disposed on the front surface of the drawer part, and a plurality of plates  391 ,  392 , and  393  defining an outer appearance of the drawer part  32 . 
     In more detail, the drawer body  38  may be injection-molded by using a plastic material and define an entire shape of the drawer part  32 . The drawer body  38  may have a basket shape having an opened top surface to define a food storage space therein. An inclined surface  321  may be disposed on a rear surface of the drawer body  38 . Thus, an interference with the machine room  3  may not occur. 
     The door frames  316  may be mounted on both sides of the drawer part  32 . The door frame  316  may be coupled to a lower portion of each of both sides of the bottom surface or both left and right surfaces of the drawer part  32 . The drawer part  32  and the front panel door part  31  may be integrally coupled to each other and be inserted and withdrawn together with each other. 
     The draw-out rack  34  may be disposed on each of both the sides of the bottom surface of the drawer part  32 . The drawer part  32  may be inserted and withdrawn forward and backward by the draw-out rack  34 . In detail, in the state in which the drawer part  32  is mounted on the cabinet  10 , at least a portion is disposed in the storage space. Also, the draw-out rack  34  may be coupled to a pinion gear  141  disposed on the bottom surface of the storage space. Thus, when the draw-out motor  14  is driven, the pinion gear  141  may rotate to allow the draw-out rack  34  to move, and the drawer door  30  may be inserted and withdrawn. 
     The drawer door  30  may not be automatically inserted and withdrawn. That is, the user may push or pull the drawer door  30  to be inserted and withdrawn. Here, the draw-out rack  34  may be omitted, and thus, the insertion and withdrawal may be performed through only the draw-out rail  33 . 
     A plurality of reinforcement ribs  381  may extend in vertical and horizontal directions on both left and right sides of the drawer body  38 . The reinforcement ribs  381  may prevent the drawer body  38  from being deformed by a load applied to both the left and right surfaces of the drawer body. 
     A rail mounting part  382  on which the draw-out rail  33  for guiding the insertion and withdrawal of the drawer body  38  is mounted may be disposed on a lower portion of each of both the side surfaces of the drawer body  38 . The rail mounting part  382  may extend from a front end to a rear end and provide a space in which the draw-out rail  33  is accommodated. The draw-out rail  33  may be a rail that extends in multistage. The draw-out rail  33  may have one end fixed to the storage space inside the cabinet  10  and the other end fixed to the rail mounting part  382  to more stably realize insertion and the withdrawal of the drawer door  30 . 
     The plurality of plates  391 ,  392 , and  393  made of a plate-shaped metal material such as stainless steel to define at least portions of the inside and outside of the drawer body  38  may be provided on the drawer body  38 . 
     In detail, the outer side plate  391  may be disposed on each of both left and right surfaces of the outside of the drawer body  38 . The outer side plate  391  may be mounted on each of both the left and right surfaces of the drawer body  38  to define an outer appearance of each of both the side surfaces. Particularly, the constituents such as the power transmission member  52  and the draw-out rail  33 , which are mounted on both the sides of the drawer body  38  may not be exposed to the outside. 
     An inner side plate  392  may be disposed on each of both left and right surfaces of the inside of the drawer body  38 . The inner side plate  392  may be mounted on each of both the side surfaces of the drawer body  38  to define both the left and right surfaces of the inside thereof. 
     The extending end of the upper bent part  391   a  bent at the upper end of the outer side plate  391  may contact the upper end of the inner side plate  391 . Thus, all of both side surfaces, inner and outer side surfaces, and a top surface of the drawer body  38  may be covered by the inner side plate  392  and the outer side plate  391 . 
     An inner plate  395  may be disposed on each of front, bottom, and rear surfaces of the inside of the drawer body  38 . The inner plate  395  may be constituted by a front surface part  395   a , a bottom surface part  395   b , and a rear surface part  395   c , which have sizes correspond to the front surface, the bottom surface, and the rear surface of the inside of the drawer body  38 . The inner plate  395  may be provided by bending the plate-shaped stainless material so that the inner plate  395  defines the inner surface of the remaining portion except for both the left and right surfaces of the drawer body  38 . Also, both left and right ends of the inner plate  395  may contact the inner side plate  392 . The front surface part  395   a , the bottom surface part  395   b , and the rear surface part  395   c  constituting the inner plate  395  may be separately provided and then coupled to or contact each other. 
     The entire inner surfaces of the drawer body  38  may be defined by the inner side plate  392  and the inner plate  395 , and the inner surface of the drawer body  38  may provide texture of the metal. Thus, the storage space within the drawer part  32  may have a metal texture on the whole, and the foods accommodated in the drawer part  32  may be more uniformly cooled and thus stored at a low temperature in the more uniform region. In addition, visually excellent cooling performance and storage performance may be provided to the user. 
     Also, upper bent parts  395   d  and  395   e  that are bent outward may be further disposed on the front surface part  395   a  and the rear surface part  395   c  of the inner plate  395  to cover the top surfaces of the front end and the rear end of the drawer body  38 , respectively. Also, the rear surface part  395   c  may have a shape corresponding to the inclined surface  321  of the rear surface of the drawer body  38  and thus be closely attached to the inclined surface  321 . 
     Also, a bottom surface opening  395   f  may be further defined in the rear end of the bottom surface part  395   b  adjacent to the lower end of the rear surface part  395   c . The bottom surface opening  395   f  may be opened at a position corresponding to a cover support part protruding from the bottom surface of the drawer body. Thus, the cover support part may be exposed through the bottom surface opening  395   f . The lower end of the drawer cover  37  may be coupled to the cover support part so that the drawer cover  37  is mounted. 
     The drawer cover  37  may include a cover front part  371  that partitions the inside of the drawer body  38  into a front space S 1  and a rear space S 2  and a cover top surface part  372  bent from an upper end of the cover front part  371  to cover a top surface of the rear space S 2 . 
     That is, when the drawer cover  37  is mounted, only the front space S 1 , in which the support member  35  is disposed, may be exposed in the drawer body  38 , and the rear space S 2  may be covered by the drawer cover  37 . 
     A lower end of the cover front part  371  may be coupled to the bottom surface of the drawer part  32 . Also, a plurality of cover restriction parts  373  may be disposed along both the left and right ends of the drawer cover  37 . The cover restriction part  373  may be coupled to a protrusion protruding from the inner surface of the drawer body  38 . 
     If necessary, a separate accommodation member may be further provided inside the drawer cover  37 . The drawer cover  37  may be configured to be openable to utilize the accommodation member. 
     The front surface of the drawer body  38  may be coupled to the rear surface of the front panel door part  31  so that a separate plate is not required to define an outer appearance on the front surface of the drawer body  38 . Also, a drawer opening  383  may be defined in the front surface of the drawer body  38  so that the guide device  50  is mounted. The drawer opening  383  may be defined in each of both the sides of the elevation member  45  so that the elevation member  45  passes therethrough. The drawer opening  383  may be elongated in the vertical direction so that the elevation member  45  vertically move. 
     The guide device  50  may be mounted in the drawer opening  383 , and the elevation member  45  may be disposed inside the drawer part  32  through the guide device  50 . When the elevation member  45  moves vertically, the opening that is exposed to the inside of the drawer part  32  may be covered by the guide device  50 . 
     The support member  35  may be disposed in the drawer body  38 . The support member  35  may include one component of the elevation assembly  40 . The support member  35  may have a size that is enough to be accommodated in the front space S 1  of the bottom surface of the drawer body  38 . 
     Also, the support member  35  may have a rectangular plate shape. Substantially, the support member  35  may include an elevation plate  351  supporting the food or container and an elevation frame  352  having a rectangular frame shape and supporting the elevation plate  351  at a lower side and reinforcing strength of the elevation plate  351 . The support member  35  may be a portion on which the food or container  36  is substantially seated and supported and thus may be called a seating member or a tray. Also, the support member  35  may be provided as one of the elevation plate  351  or elevation frame  352 . 
     The elevation plate  351  may have a rectangular plate shape and include a circumferential part  351   a  protruding upward along a circumference thereof. The circumferential part  351   a  may have an opened bottom surface, and the elevation frame  352  may be accommodated in the circumferential part  351   a.    
     Hereinafter, a structure of the guide device will be described in more detail with reference to the accompanying drawings. 
       FIG. 9  is an exploded perspective view of the guide device according to an embodiment. 
     As illustrated in the drawings, the guide device  50  may include a guide frame  51  having a rectangular frame shape and having a guide hole  511  defined in a center thereof and a plurality of shutters  53  and  54  mounted to be slidably movable in the guide hole  511  and covering the guide hole  511 . 
     A plurality of shutters  53  and  54  may be arranged along the moving direction of the elevation member  45 . Hereinafter, for convenience of explanation and understanding, it is assumed that the two shutters  53  and  54  are provided. 
     The guide frame  51  may be mounted on a front surface of the drawer body  38  and also may have a shape corresponding to the drawer opening  383  and mounted in the drawer opening  383 . The guide frame  51  may be made of a plastic material, and a structure for guiding the mounting of the shutters  53  and  54  and the movement of the shutters  53  and  54  may be provided. 
     In detail, a frame bent part  513  bent backward may be disposed on a lower end of the guide frame  51 , and a coupling hole  515  through which a screw passes may be disposed on the frame bent part  513  to fix and mount the guide frame  51  to the drawer body  38 . Also, a center protrusion  514  may be disposed at a center of the frame bent part  513 . A bottom surface of the guide frame  51  may have a stepped structure by the center protrusion  514  so as to be disposed at the correct position when the guide frame  51  is mounted. 
     A guide hole  511  may be defined in the center of the guide frame  51  to guide the elevation member  45  to move vertically. The guide hole  511  may be lengthily defined in the vertical direction and may have a length corresponding to a vertical movement length of at least the elevation member  45 . 
     Also, a shutter guide part  52  may be disposed on an inner surface of the guide hole  511 . The shutter guide part  52  may guide the plurality of shutters  53  so that the shutters  53  move in the vertical direction and may be disposed on each of the left and right sides of the guide hole  511 . The shutter guide part  52  may include a guide protrusion  521 , a first guide  522 , and a second guide  523 . A specific structure of the shutter guide part  52  will be described below in more detail. 
     The shutters  53  and  54  may be provided on an inner side of the guide holes  511  and may have a plate shape to partially cover the guide holes  511 . Each of the shutters  53  and  54  may have a lateral width correspond to that of the guide hole  511  and may vertically move by the guide of the shutter guide part  52 . The shutters  53  and  54  may include a first shutter  53  and a second shutter  54  having the same vertical lengths and may vertically move upward and downward along the shutter guide part  52 . 
     The first shutter  53  may be disposed below the second shutter  54  in a state where the elevation member  45  does not ascend. Also, a first lower protrusion  531  may be disposed on both left and right sides of a lower end of the first shutter  53 , and a first upper protrusion  532  may be disposed on both left and right sides of an upper end of the first shutter  53 . 
     The first lower protrusion  531  and the first upper protrusion  532  may be inserted into the first guide  522  so that the first shutter  53  is mounted inside the guide hole  511 , and simultaneously, the first shutter  53  vertically moves. 
     Also, a shutter bent part  533  may be disposed on an upper end of the first shutter  53 . The shutter bent part  533  may be bent forward from the upper end of the first shutter  53  by a thickness of the second shutter  54  and then bent upward. Also, the lower end of the second shutter  54  may be seated on the shutter bent part  533  so that the first shutter  53  supports the second shutter  54  from a lower side. Also, a gap between the upper end of the first shutter  53  and the lower end of the second shutter  54  may be covered by the shutter bent part  533 . 
     The second shutter  54  may be disposed above the first shutter  53  in a state where the elevation member  45  does not ascend. The guide holes  511  may be mostly covered while the first shutter  53  and the second shutter  54  are disposed in parallel to each other, and all the rest portions except for a portion of the lower end through which the elevation member  45  passes may be covered. 
     Also, a second lower protrusion  541  may be disposed on both left and right sides of a lower end of the second shutter  54 , and a second upper protrusion  542  may be disposed on both left and right sides of an upper end of the second shutter  54 . The second lower protrusion  541  and the second upper protrusion  542  may be inserted into the second guide  523  so that the second shutter  54  is mounted inside the guide hole  511 , and simultaneously, the second shutter  54  vertically moves. 
     Since an additional shutter is not provided above the second shutter  54 , the shutter bent part  533  may not be disposed on the upper end of the second shutter  54 . Also, the upper end of the second shutter  54  may be disposed at a position corresponding to the upper end of the guide hole  511  to cover the guide hole  511 . When the additional shutter is provided above the second shutter  54 , the shutter bent part  533  may be further disposed on the upper end of the second shutter  54 . 
     A cover part  512  may be disposed above the guide hole  511 . The cover part  512  may be disposed above the second shutter  54 , and the upper end of the second shutter  54  and the lower end of the cover part  512  may be disposed to overlap each other in the state in which the second shutter  54  is disposed at the lowermost side. 
     Also, a vertical length of the cover part  512  may be greater than that of each of the shutters  53  and  54 , i.e., each of the first and second shutters  53  and  54 . Thus, the first shutter  53  and the second shutter  54  may overlap each other on the front surface of the cover part  512  in a state in which the elevation member  45  moves to the uppermost position. Also, the first shutter  53  and the second shutter  54  may be covered by the cover part  512  when viewed from the inside of the drawer part  32 . 
     Hereinafter, the shutter guide part  52  for guiding the vertical movement of the shutters  53  and  54  will be described in more detail. 
       FIG. 10  is a perspective view illustrating the guide frame of the guide device. Also,  FIG. 11  is a longitudinal cross-sectional view of the guide frame. 
     As illustrated in the drawings, the shutter guide part  52  may be disposed on both left and right sides of the guide hole  511  of the guide frame  51 . The shutter guide part  52  may be disposed along both sides of the guide hole  511  so that the guide hole  511  is opened and closed while the first shutter  53  and the second shutter  54  move vertically along the guide hole  511 . 
     In detail, the shutter guide part  52  may include a guide protrusion  521 , a first guide  522 , and a second guide  523 . The guide protrusion  521  provides a surface on which the first guide  522  and the second guide  523  are capable of being disposed. That is, the guide protrusion  521  may define at least a portion of each of both sides of the guide hole  511  and extend to the area of the cover part  512 . 
     Also, the guide protrusion  521  may protrude backward along the guide hole  511  by a predetermined height. Thus, the rear surface of each of the shutters  53  and  54  and the rear surface of the guide device  50  may be disposed on the same plane when the shutters  53  and  54  are closed. That is, the shutters  53  and  54  are disposed on the same plane as the inner surface of the drawer part  32  in the closed state to prevent a stepped portion from occurring, thereby improving the outer appearance and prevent foods from being caught through the stepped portion or the gap. 
     Also, the lower end of the guide protrusion  521  may be disposed at a position spaced apart from the lower end of the guide hole  511 . Thus, the shutters  53  and  54  may be disposed at positions away from the lower end of the guide hole  511  in the state in which the shutters  53  and  54  are completely closed to provide a space into which the elevation member  45  is inserted. 
     The first guide  522  and the second guide  523  may be disposed on a surface of the guide protrusion  521  facing the inside of the guide hole  511 . Also, the first guide  522  and the second guide  523  may be disposed on the inner side surfaces of the guide protrusion  521  on the left and right sides facing the guide hole  511 , respectively. 
     The first guide  522  may extend from the lower end of the guide protrusion  521  to the upper end of the guide protrusion  521  and be recessed in a size at which the first upper protrusion  532  and the second upper protrusion  542  are insertable. Thus, the first shutter  53  may move in the vertical direction along the first guide  522  and also move from the lower end of the guide protrusion  521  to the shutter cover part  512 . 
     Also, a first lower groove  522   a  extending obliquely backward and downward may be defined in the lower end of the first guide  522 . The first lower groove  522   a  may be defined so that the first lower protrusion  531  is inserted in a state in which the first shutter  53  is disposed at the lowermost position. Also, the first shutter  53  may moves backward while the first lower protrusion  531  is inserted into the first lower groove  522   a  so that the rear surface of the first shutter  53  is disposed on the same plane as the drawer part  32 . 
     Also, a first upper groove  522   b  may be defined above the first lower groove  522   a . The first upper groove  522   b  may be defined in parallel with the first lower groove  522   a  and may extend backward and downward from one side of the first guide  522  extending in the vertical direction. Also, the first upper groove  522   b  may be defined so that the first upper protrusion  532  is inserted. 
     The first upper protrusion  532  may be inserted into the first upper groove  522   b  when the first lower protrusion  531  is inserted into the first lower groove  522   a . Thus, when the first shutter  53  moves downward, the first upper protrusion  532  and the first lower protrusion  531  may inserted into the first upper groove  522   b  and the first lower groove  522   a  at the same time to move backward and downward. 
     A second guide  523  for guiding the second shutter  54  may be disposed behind the first guide  522 . The second guide  523  may extend in parallel with the first guide  522 . The second guide  523  may extend upward from the upper end of the first upper groove  522   b  of the first guide  522  and extend to the upper end of the cover part  512  like the first guide  522 . Thus, the second shutter  54  may move upward from the upper side of the first shutter  53  along the second guide  523  to a position at which the second shutter  54  is covered by the cover part  512 . 
     A second lower groove  523   a  extending obliquely backward and downward may be defined in the lower end of the second guide  523 . The second lower protrusion  541  may be accommodated in the second lower groove  523   a , and the second lower protrusion  541  may be disposed inside the second lower groove  523   a  when the second shutter  54  is disposed at the lowest position. 
     Also, a second upper groove  523   b  may be defined above the second lower groove  523   a . The second upper groove  523   b  may be defined to have an inclination corresponding to the second lower groove  523   a , and when the second lower protrusion  541  is inserted into the second lower groove  523   a , the second upper protrusion  542  may also be defined in a position corresponding to a position to be inserted into the second upper groove  523   b . Here, the second upper groove  523   b  may be disposed further above the lower end of the cover part  512 . 
     The second upper protrusion  542  and the second lower protrusion  541  may move vertically along the second guide  523 . Thus, the second shutter  54  may move along the second guide  523 . 
     In the state in which the second shutter  54  is disposed at the lowest position, the second upper groove  523   b  and the second lower groove  523   a  may be defined so that the rear surface of the second shutter  54  is disposed on the same plane as the rear surface of the first shutter  53  and the inner surface of the drawer part  32 . Also, the first shutter  53 , the second shutter  54 , and the inner plate  395  of the drawer part  32  may be made of the same material so that the outer appearance of the inner shutter  395  has a sense of unity. 
     Hereinafter, the operation of the guide device  50  having the above structure will be described with reference to the drawings. 
       FIGS. 12A to 12C  are perspective views sequentially illustrating an operation state of the guide device.  FIG. 13  is a perspective view illustrating a state of the guide device when the elevation assembly is disposed at the lowermost side.  FIG. 14  is a perspective view illustrating a state of the guide device when the elevation assembly is disposed at the uppermost side. 
     As illustrated in  FIGS. 12A and 13 , when the elevation assembly  40  does not operate in the state in which the elevation member  45  is mounted on the elevation assembly  40 , all the rest regions except of a portion of the lower end of the guide hole  511  may be covered by the first shutter  53  and the second shutter  54 . 
     Here, the elevation member  45  may pass through the lower end of the guide hole  511  opened below the first shutter  53  and extend to the inside of the drawer part  32  to support the support member  35  from a lower side. 
     Particularly, the guide device  50  may be disposed at the lowest position of the first guide  522  and the second guide  523  in a state in which the first shutter  53  and the second shutter  54  completely move downward. Here, separate external force may not be applied to the first shutter  53  and the second shutter  54 , and the first shutter  53  and the second shutter  54  may be disposed at the lowest positions due to the self-weight of each of the first shutter  53  and the second shutter  54 . 
     Here, the first upper protrusion  532  and the first lower protrusion  531  of the first guide  522  may be disposed in the first upper groove  522   b  and the first lower groove  522   a , and the first shutter  53  may move downward and backward by the inclination of each of the first upper groove  522   b  and the first lower groove  522   a.    
     Here, the second upper protrusion  542  and the second lower protrusion  541  of the second guide  523  may be disposed in the second upper groove  523   b  and the second lower groove  523   a , and the second shutter  54  may move downward and backward by the inclination of each of the second upper groove  523   b  and the second lower groove  523   a.    
     In this state, the second shutter  54  may be seated on the shutter bent part  533  at the upper end of the first shutter  53 , and the first shutter  53  and the second shutter  54  may be disposed on the same plane. Also, the upper end of the second shutter  54  contacts the lower end of the cover part  512 . Thus, the rear surface of the first shutter  53 , the rear surface of the second shutter  54 , and the inner surface of the drawer part  32  may be disposed on the same plane so that when viewed from the inside of the drawer part  32 , the guide device  50  may have a sense of unity with the drawer part  32 . 
     Also, the lower end of the first shutter  53  may be disposed further below the position of the support member  35 . Thus, in the state in which the support member  35  is mounted, the elevation member and the opened lower portion of the guide hole  511  through which the elevation member  45  passes may not be exposed to the outside. 
     In this state, the elevation assembly  40  may operate by user&#39;s manipulation, and the elevation member  45  may ascend. The elevation member  45  may further ascend along the guide hole  511 . 
     When the elevation member  45  ascends by a predetermined height, the top surface of the elevation member  45  may contact the lower end of the first shutter  53 . Thus, as the elevation member  45  further ascends, the first shutter  53  may be lifted. When the first shutter  53  is lifted upward from a lower side of the first shutter  53  by the ascending of the elevation member  45 , the first shutter  53  may move upward. 
     In detail, in the state of  FIG. 13 , when the elevation member  45  moves upward by the driving of the elevation assembly  40 , the first shutter  53  may be lifted upward. 
     Here, the first upper protrusion  532  and the first lower protrusion  531  of the first shutter  53  may move forward and upward along the inclination of the first upper groove  522   b  and the first lower groove  522   a , respectively. Also, the first upper protrusion  532  and the first lower protrusion  531  which are out of the first upper groove  522   b  and the second upper groove  523   b  may move upward along the first guide  522  extending vertically from the front side of the second guide  523 . 
     That is, the second shutter  54  of the first shutter  53  and the second shutter  54 , which are disposed on the same plane may be maintained in the current position, and the first shutter  53  may move to the front side of the second shutter  54  and then move upward again. The first shutter  53  may move vertically in a state where the first shutter  53  overlaps the second shutter  54  according to the continuous upward movement of the elevation member  45 . 
     The first shutter  53  may continuously moves upward by the continuous movement of the elevation member  45 . As illustrated in  FIG. 12B , the first shutter  53  may move upward until the whole of the first shutter  53  moves is disposed behind the second shutter  54 . 
     Also, when the elevation member  45  further moves upward, the first shutter  53  may move up to the same height as the second shutter  54 . Thus, in the state of  FIG. 12B , the top surface of the elevation member  45  may contact the lower end of the first shutter  53  as well as the lower end of the second shutter  54  when the elevation member  45  further moves upward. 
     In this state, when the elevation member  45  further ascends, the first shutter  53  continuously ascends along the vertical region of the first guide  522 . Also, the second shutter  54  may also be pushed up by the elevation member  45 . Here, the second upper protrusions  542  and the second lower protrusions  541  of the second shutter  54  may move forward and upward along the inclined second upper groove  523   b  and the inclined second lower groove  523   a , respectively. Also, the second upper protrusion  542  and the second lower protrusion  541  which are out of the second upper groove  523   b  and the second lower groove  523   a  may move upward along the vertical region of the second guide  523 . 
     When the elevation member  45  continuously ascends, although the second shutter  54  moves forward, the second guide  523  may be disposed behind the first guide  522 . Thus, the second shutter  54  may also be disposed behind the first shutter  53  and move upward. Here, since all of the first guide  522  and the second guide  523  extend vertically at the rear side of the cover part  512 , the first shutter  53  and the second shutter  54  may also move to the rear side of the cover part  512 . 
     Also, the first shutter  53  and the second shutter  54  may ascend by the continuous ascending of the elevation member  45 . Thus, the opening area of the guide hole  511  may gradually increase upward. However, since the elevation member  45  supports the support member  35  from the lower side, the opened area of the guide hole  511 , which increases to the lower side of the elevation member  45 , may be naturally disposed below the support member  35  and thus may not be exposed to the outside. 
     The elevation member  45  may continuously ascend up to a height at which the support member  35  reaches a maximum height. When the elevation member  45  ascends to the maximum height, as illustrated in  FIGS. 12C and 14 , all of the first shutter  53  and the second shutter  54  may move upward and be disposed behind the cover part  512  and thus be covered by the cover part  512 . 
     That is, the elevation member  45  may operate until the elevation member  45  is disposed at the maximum height by the operation of the elevation assembly  40  so that the support member  35  is disposed at a set height. When the elevation member  45  reaches the maximum height, the first shutter  53  and the second shutter  54  may be entirely disposed in front of the cover part  512  as shown in  FIG. 14 , and thus, the first shutter  53  and the shutter  54  may be covered without being exposed to the outside. 
     When the user&#39;s food storage is completed in a state where the support member  35  moves to the uppermost position, the elevation assembly  40  may be driven by the user&#39;s manipulation to allow the elevation member to move downward, and thus, the support member  35  may move downward. 
     As illustrated in  FIG. 13 , the elevation member  45  may move downward at its initial position. When the elevation member  45  moves downward, the first shutter  53  and the second shutter  54  may move downward by their own weight. 
     When the elevation member  45  moves, the first shutter  53  and the second shutter  54  may move downward together. Here, the first shutter  53  and the second shutter  54  may move downward by their own weight without applying external force to the first shutter  53  and the second shutter  54 . Also, the first shutter  53  and the second shutter  54  may respectively move downward along the first guide  522  and the second guide  523 . Here, the second shutter  54  may reach the initial position, and then, the first shutter  53  may reach the initial position. 
     The second shutter  54  may move to the second upper groove  523   b  and the second lower groove  523   a  through the vertical region of the second guide  523 , and while the second upper protrusion  542  and the second lower protrusion  541  are inserted into the second upper groove  523   b  and the second lower groove  523   a , the second upper protrusion  542  and the second lower protrusion  541  may move backward and downward to complete the downward movement, thereby covering a portion of the guide hole  511 . 
     Also, the first shutter  53  may continuously move downward along the vertical direction of the first guide  522  even when the downward movement of the second shutter  54  is completed. 
     Just before the first shutter  53  completely moves downward, the first upper protrusion  532  and the first lower protrusion  531  may move downward and backward along the first upper groove  522   b  and the first lower groove  522   a . When the first shutter  53  completely moves downward, the lower end of the second shutter  54  may be seated on the shutter bent part  533  of the upper end of the first shutter  53 . Also, the first shutter  53  may cover a portion of the opened area of the guide hole  511  below the second shutter  54 . 
     In this state, the guide holes  511  may be completely covered by the first shutter  53  and the second shutter  54  except for the area in which the elevation member  45  is accessible. Also, when viewed from the inside of the drawer part  32  on which the support member  35  is mounted, all of the guide holes  511  may be seen as being covered by the first shutter  53  and the second shutter  54 . 
     Hereinafter, a state in which the drawer door  30  of the refrigerator  1  is inserted and withdrawn and is elevated according to an embodiment will be described in more detail with reference to the accompanying drawings. 
       FIG. 15  is a view illustrating a state in which the drawer door is closed. 
     As illustrated in the drawing, in the state in which the food is stored, the refrigerator  1  may be maintained in a state in which all of the rotation door  20  and the drawer door  30  are closed. In this state, the user may withdraw the drawer door  30  to accommodate the food. 
     The drawer door  30  may be provided in plurality in a vertical direction and be withdrawn to be opened by the user&#39;s manipulation. Here, the user&#39;s manipulation may be performed by touching the manipulation part  301  disposed on the front surface of the rotation door  20  or the drawer door  30 . Alternatively, an opening command may be inputted on the manipulation device  302  provided on the lower end of the drawer door  30 . Also, the manipulation part  301  and the manipulation device  302  may individually manipulate the insertion and withdrawal of the drawer door  30  and the elevation of the support member  35 . Alternatively, the user may hold a handle of the drawer door  30  to open the drawer door  30 . 
     Hereinafter, although the lowermost drawer door  30  of the drawer doors  30 , which are disposed in the vertical direction, is opened and elevated as an example, all of the upper and lower drawer doors  30  may be inserted and withdrawn and elevated in the same manner. 
       FIG. 16  is a partial perspective view illustrating a state in which the drawer door is withdrawn to be elevated. Also,  FIG. 17  is a cross-sectional view illustrating a state in which the drawer door is withdrawn. 
     As illustrated in the drawings, the user may manipulate the draw-out operation on the drawer door  30  to withdraw the drawer door  30  forward. The drawer door  30  may be withdrawn while the draw-out rail  33  extends. 
     The drawer door  30  may be configured to be inserted and withdrawn by the driving of the draw-out motor  14 , not by a method of directly pulling the drawer door  30  by the user. The draw-out rack  34  provided on the bottom surface of the drawer door  30  may be coupled to the pinion gear  141  rotating when the draw-out motor  14  provided in the cabinet  10  is driven. Thus, the drawer door  30  may be inserted and withdrawn according to the driving of the draw-out motor  14 . 
     The draw-out distance of the drawer door  30  may correspond to a distance at which the front space S 1  within the drawer part  32  is completely exposed to the outside. Thus, in this state, the support member  35  may not interfere with the doors  20  and  30  disposed thereabove or the cabinet  10 . 
     Here, the draw-out distance of the drawer door  30  may be determined by a draw-out detection device  15  disposed on the cabinet  10  and/or the drawer door  30 . The draw-out detection device  15  may be provided as a detection sensor that detects a magnet  389  to detect a state in which the drawer door  30  is completely withdrawn or closed. 
     For example, as illustrated in the drawings, the magnet  389  may be disposed on the bottom of the drawer part  32 , and the detection sensor may be disposed on the cabinet  10 . The draw-out detection device  15  may be disposed at a position corresponding to a position of the magnet  389  when the drawer door  30  is closed and a position of the magnet  389  when the drawer door  30  is completely withdrawn. Thus, the draw-out state of the drawer door  30  may be determined by the draw-out detection device  15 . 
     Also, as necessary, a switch may be provided at each of positions at which the drawer door  30  is completely inserted and withdrawn to detect the draw-out state of the drawer door  30 . In addition, the draw-out state of the drawer door  30  may be detected by counting the rotation number of draw-out motor  14  or measuring a distance between the rear surface of the front panel door part  31  and the front end of the cabinet  10 . 
     In the state in which the drawer door  30  is completely withdrawn, the elevation motor  411  may be driven to elevate the support member  35 . The support member  35  may be driven in an even situation in which the drawer door  30  is sufficiently withdrawn to secure safe elevation of the food or container  36  seated on the support member  35 . 
     That is, in the state in which the drawer door  30  is withdrawn to completely expose the front space to the outside, the support member  35  may ascend to prevent the container  36  or the stored food seated on the support member  35  from interfering with the doors  20  and  30  or the cabinet  10 . 
     The ascending of the support member  35  may start in a state in which the drawer door  30  is completely withdrawn. Also, to secure the user&#39;s safety and prevent the food from being damaged, the ascending of the support member  35  may start after a set time elapses after the drawer door  30  is completely withdrawn. 
     After the drawer door  30  is completely withdrawn, the user may manipulate the manipulation part  301  to input the ascending of the support member  35 . That is, the manipulation part  301  may be manipulated to withdraw the drawer door  30 , and the manipulation part  301  may be manipulated again to elevate the support member  35 . Also, the drawer door  30  may be manually inserted and withdrawn by a user&#39;s hand. After the drawer door is withdrawn, the manipulation part  301  is manipulated to elevate the support member  35 . 
     The elevation assembly  40  may not operate in the process of inserting and withdrawing the drawer door  30 , and the elevation operation may be performed only when the drawer door  30  is fully withdrawn. The elevation assembly  40  may be in a state as shown in  FIG. 17  until the drawer door  30  is completely withdrawn. 
     That is, the elevation motor  421  may be maintained in a state in which the elevation motor is not driven, and thus, the elevation member  45  may also be disposed at the lowest position. The elevation member  45  may pass through the guide device  50  and be disposed below the support member  35  to maintain a standby state for ascending. 
     Also, in this state, the shutters  53  and  54  of the guide device  50  may cover most of the guide hole  511  to become the state shown in  FIGS. 12A and 13 . In this state, all of the guide holes  511  exposed to the drawer part  32  may be covered by the first shutter  53  and the second shutter  54 , and when the user looks at the inside of the drawer part  32 , a state of having a feeling of unity with the inside wall surface of the drawer part without generating the stepped portion or the gap may be maintained. 
       FIG. 18  is a partial perspective view illustrating a state in which the drawer door ascends. Also,  FIG. 19  is a cross-sectional view illustrating the state in which the drawer door ascends. 
     As illustrated in  FIGS. 16 and 17 , the elevation assembly  40  may operate, and the elevation of the support member  35  may be performed in a state in which the drawer door  30  is withdrawn more than a set distance so that the front space S 1  is completely exposed. 
     In more detail, when the elevation motor  411  operates, the elevation shaft may rotate by the gear assembly  423  connected to the elevation motor  411 , and the elevation block  44  mounted on the elevation shaft  43  may rotate. Here, the upward movement of the elevation member  45  mounted on the elevation block  44  may also cause the upward movement of the elevation member  45  so that the shutters  53  moves upward by the elevation member  45  as illustrated in  FIG. 12B . Also, the elevation member  45  may lift the support member  35  in a state of supporting the support member  35  from the lower side. 
     As the elevation member  45  ascends, the support member  35  may continuously ascend by a sufficient height so that the user is accessible to the food or  36  seated on the support member  35 . Thus, the user may easily lift the food or container. 
     When an ascending completion signal is inputted, the driving of the elevation motor  411  may be stopped. For this, a height detection device  16  for detecting a position of the support member  35  may be provided. The height detection device  16  may be provided in the front panel door part  31  at a height corresponding to the uppermost ascending position of the support member  35  and the lowermost descending position of the support member  35 . 
     The height detection device  16  may be provided as a detection sensor that detects a magnet  355 . The height detection device  16  may detect the magnet  355  disposed on the support member  35  to determine whether the ascending of the support member  35  is completed. Also, the height detection device  16  may be provided as a switch structure to turn on the switch when the support member  35  maximally ascends. Also, the height detection device  16  may be provided on the elevation assembly  40  such as the frame  41  or the elevation block  44  to detect the maximally ascending position of the support member  35 . Also, whether the support member  35  maximally ascends may be determined according to a variation in load applied to the elevation motor  411 . 
     The driving of the elevation motor  411  is stopped in the state in which the support member  35  maximally ascends. In this state, although the support member  35  is disposed inside the drawer part  32 , the food or container  36  seated on the support member  35  may be disposed at a position higher than the opened top surface of the drawer part  32 . Thus, the user may easily access the food or container  36 . Particularly, it is not necessary to allow the waist excessively for lifting the container  36 , so that it is possible to perform safer and more convenient operation. 
     Also, in the state in which the support member  35  ascends by the maximum height, the guide device  50  may be in the state of  FIGS. 12C and 14 . That is, the elevation member  45  may ascend at the highest height, and thus, all of the first shutter  53  and the second shutter  54  may ascend up to a position of the cover part  512 . 
     That is, while the elevation member  45  ascends, the first shutter  53  or the second shutter  54  may be maintained in a state of covering the opened region of the guide hole  511  above the elevation member  45  while maintaining the state of contacting the elevation member  45  to prevent the trajectory of the elevation member  45 , along which the elevation member  45  moves into the drawer part  32 , from being exposed in the opened state. 
     After the user&#39;s food storing operation is completed, the user may allow the support member  35  to descend by manipulating the manipulation part  301 . The descending of the support member  35  may be performed by reverse rotation of the elevation motor  411  and may be gradually performed through the reverse procedure with respect to the above-described procedure. 
     The support member  35  may also descend along with the descending of the elevation member  45 , and the first shutter  53  and the second shutter  54  contacting with the elevation member  45  may move downward to gradually cover the guide hole  511 , which is opened above the elevation member  45 . 
     Also, when the support member  35  completely descends, the state shown in  FIG. 16 or 17  may be achieved, and the guide device may be in a state as shown in  FIGS. 12A and 13 . Here, the descending completion of the support member  35  may be accomplished by the height detection device  16 . The height detection device  16  may be further provided at a position that detects the magnet disposed on the support member  35  when the support member  35  is disposed at the lowermost descending position. Thus, when the completion of the descending of the support member  35  is detected, the driving of the elevation motor is stopped. 
     Also, after the driving of the elevation motor  411  is stopped, the drawer door  30  may be inserted. Here, the drawer door  30  may be closed by the user&#39;s manipulation or by the driving of the draw-out motor  14 . When the drawer door  30  is completely closed, a state of  FIG. 15  may become. 
     In addition to the foregoing embodiment, various embodiments may be exemplified. 
     Hereinafter, another embodiments will be described with reference to the accompanying drawings. In the other embodiments of the present disclosure, the same reference numerals are used for the same components as those of the above-described embodiments, and a detailed description thereof will be omitted. 
       FIG. 20  is a perspective view illustrating a state in which a drawer door of a refrigerator ascends according to another embodiment. 
     As illustrated in the drawing, a refrigerator  1  according to another embodiment may include a cabinet  10  having a storage space that is vertically partitioned and a door  2  opening and closing the storage space. 
     The door  2  may include a rotation door  20  which is provided in an upper portion of a front surface of the cabinet  10  to open and close an upper storage space and a drawer door  30  disposed in a lower portion of the front surface of the cabinet  10  to open and close a lower storage space. The drawer door  30  may be inserted and withdrawn forward and backward like the foregoing embodiment. In the state in which the drawer door  30  is withdrawn, the support member  35  within the drawer door  30  may be vertically elevated. 
     A manipulation part  301  or a manipulation device  302  may be provided at one side of the front panel door part  31 . The insertion and withdrawal of the drawer door  30  and/or the elevation of the support member  35  may be realized by manipulating the manipulation part  301  or the manipulation device  302 . 
     Also, the elevation assembly  40  may be provided on the inner side of the front panel door part  31  or on the rear side of the front panel door part  31 . The elevation assembly  40  may have the same structure as that of the above-described embodiment. The elevation assembly  40  may be configured such that all of the constituents for driving are disposed in the front panel door part  31 . The elevation member  45  may extend inside the drawer part  32  through the drawer part  32 , thereby supporting the support member  35  from the lower side. 
     Thus, the support member  35  may be elevated in the vertical direction as the elevation member  45  is elevated by the operation of the support member  35 . Since the specific configuration of the elevation assembly  40  and the configuration of the guide device  50  provided in the drawer part  32  are the same as those in the above-described embodiment, detailed description and illustration thereof will be omitted. 
     A plurality of containers  361  may be accommodated in the drawer part  32 . The container  361  may be a sealed container such as a kimchi passage, and a plurality of the containers  361  may be seated on the support member  35 . The container  361  may be elevated together with the support member  35  when the support member  35  is elevated. Thus, in the state in which the container  361  ascends, at least a portion of the drawer part  32  may protrude, and thus, the user may easily lift the container  361 . 
     The support member  35  may interfere with the rotation door  20  in the rotation door  20  is opened even though the drawer door  30  is withdrawn. Thus, the support member  35  may ascend in a state in which the rotation door  20  is closed. For this, a door switch for detecting the opening/closing of the rotation door  20  may be further provided. 
       FIG. 21  is a perspective view illustrating a state in which a drawer door of a refrigerator ascends according to another embodiment. 
     As illustrated in the drawings, a refrigerator  1  according to another embodiment includes a cabinet  10  defining a storage space therein and a door  2  opening and closing an opened front surface of the cabinet  10 , which define an outer appearance of the refrigerator  1 . 
     The door  2  may include a drawer door  30  that defines an entire outer appearance of the refrigerator  1  in a state in which the door  2  is closed and is withdrawn forward and backward. A plurality of drawer doors  30  may be continuously disposed in a vertical direction. The drawer doors  30  may be independently inserted and withdrawn by user&#39;s manipulation. A support member  35  within the drawer door  30  may be elevated. 
     The drawer door  30  may include a front panel door part exposed to the outside and opening and closing the front surface of the cabinet  10  and a drawer part  32  for defining a storage space opened upward from the rear surface of the front panel door part  31 . The overall configuration of the drawer part  32  may be the same as that of the above-described embodiment, only in the arrangement and size. 
     Also, the elevation assembly  40  may be provided on the inner side of the front panel door part  31  or on the rear side of the front panel door part  31 . The elevation assembly  40  may have the same structure as that of the above-described embodiment. The elevation assembly  40  may be configured such that all of the constituents for driving are disposed in the front panel door part  31 . The elevation member  45  may extend inside the drawer part  32  through the drawer part  32 , thereby supporting the support member  35  from the lower side. 
     Thus, the support member  35  may be elevated in the vertical direction as the elevation member  45  is elevated by the operation of the support member  35 . Since the specific configuration of the elevation assembly  40  and the configuration of the guide device  50  provided in the drawer part  32  are the same as those in the above-described embodiment, detailed description and illustration thereof will be omitted. 
     The insertion and withdrawal of the drawer door  30  and the elevation of the support member  35  may be individually performed. After the drawer door  30  is withdrawn, the support member  35  may ascend. Then, after the support member descends, the insertion of the drawer door  30  may be continuously performed. 
     Also, when the plurality of drawer doors  30  are vertically arranged, the support member  35  inside the drawer door  30 , which is relatively downwardly disposed, may be prevented from ascending in a state where the drawer door  30  is relatively drawn upward. Thus, the drawer door  30  may be prevented from interfering with the drawer door  30  in which the food and container are withdrawn upward. 
     Also, although the support member  35  ascends in the state in which the drawer door  30  that is disposed at the uppermost side is withdrawn in  FIG. 21 , all of the drawer doors  30  disposed at the upper side may also be elevated by the support members  35  provided inside. 
     If a height of each of the drawer doors  30  disposed at the upper side is sufficiently high, only the drawer door  30  disposed at the lowermost position or the support member  35  of the plurality of drawer doors  30  disposed relatively downward may be elevated. 
       FIG. 22  is a perspective view illustrating a state in which a drawer door of a refrigerator ascends according to another embodiment. 
     As illustrated in the drawings, a refrigerator  1  according to another embodiment includes a cabinet  10  defining a storage space therein and a door  2  opening and closing an opened front surface of the cabinet  10 , which define an outer appearance of the refrigerator  1 . 
     The inside of the cabinet  10  may be divided into an upper space and a lower space. If necessary, the upper and lower storage spaces may be divided again into left and right spaces. 
     The door  2  may include a rotation door  20  which is provided in an upper portion of the cabinet  10  to open and close the upper storage space and a drawer door  2  disposed in a lower portion of the cabinet  10  to open and close the lower storage space. 
     Also, the lower space of the cabinet may be divided into left and right spaces. The drawer door  30  may be provided in a pair so that the pair of drawer doors  30  respectively open and close the lower spaces. The pair of drawer doors  30  may be disposed in parallel to each other at left and right sides. The drawer doors  30  may have the same structure. 
     The drawer door  30  may include a front panel door part  31  exposed to the outside and opening and closing the front surface of the cabinet  10  and a drawer part  32  for defining a storage space opened upward from the rear surface of the front panel door part  31 . The overall configuration of the drawer part  32  may be the same as that of the above-described embodiment, only in the arrangement and size. 
     Also, the elevation assembly  40  may be provided on the inner side of the front panel door part  31  or on the rear side of the front panel door part  31 . The elevation assembly  40  may have the same structure as that of the above-described embodiment. The elevation assembly  40  may be configured such that all of the constituents for driving are disposed in the front panel door part  31 . The elevation member  45  may extend inside the drawer part  32  through the drawer part  32 , thereby supporting the support member  35  from the lower side. 
     Thus, the support member  35  may be elevated in the vertical direction as the elevation member  45  is elevated by the operation of the support member  35 . Since the specific configuration of the elevation assembly  40  and the configuration of the guide device  50  provided in the drawer part  32  are the same as those in the above-described embodiment, detailed description and illustration thereof will be omitted. 
     The following effects may be expected in the refrigerator according to the proposed embodiments. 
     The refrigerator according to the embodiment, the portion of the storage space within the drawer door may be elevated in the state in which the drawer door is withdrawn. Thus, when the food is accommodated in the drawer door disposed at the lower side, the user may not excessively turn its back to improve the convenience in use. 
     Particularly, in order to lift the heavy-weight food or the container containing the food, the user has to lift the food or container with a lot of power. However, the support member within the drawer door may ascend up to a convenient position by driving the elevation assembly to prevent the user from being injured and significantly improve the convenience in use. 
     Also, the drawer door may be configured by the coupling of the front panel door part and the drawer part, and the elevation assembly for elevating the supporting part may be mounted on the front panel door part. 
     Thus, the front panel door part and the drawer part may be separated from each other to facilitate service of the elevation assembly, and the inside of the drawer part may be safely and easily cleaned. 
     Also, the elevating assembly may include the elevation member extending from the front panel door part to the inside of the drawer, and the elevation member may support the support member from the lower side to allow the support member to move vertically. 
     Thus, the structure for elevating the support member may be covered by the drawer part, and the elevation member may be covered by the support member, thereby improving the appearance and improving the safety of use. 
     Also, the support member for accommodating the food or container may be provided in the drawer part, and the elevation member passing from the front panel door part to the drawer part may elevate the support member. Thus, the support member may be elevated inside the drawer part, and the exposure of the mechanism device for the elevation may be prevented. 
     Also, the support member inside the drawer part may be elevated, but not the entire drawer part, and the support member may move vertically stably without moving or separating. 
     Also, the support member may have the structure corresponding to the front space at the inside of the drawer part defined by the front space and the rear space. The drawer part may be disposed outside the cabinet, and the rear space may be disposed inside the cabinet. Also, the support member may have the structure in which at least a part of the rear space is elevated while being disposed inside the cabinet. 
     Thus, in such a structure, the draw-out distance of the drawer part may become shorter than that according to the related art, and the elevation may be performed in the more stable state. Also, the stability and durability may be improved due to the restriction of the draw-out distance, and there may be no need to provide the additional reinforcement structure of the structure for inserting and withdrawing the door. 
     Also, the drawer part may be provided with the guide device for defining the space through which the elevation member passes and the path through which the elevation member moves vertically so that elevation of the elevation member or elevation of the support member are facilitated. 
     Also, the guide device may be provided with the guide member which covers the guide hole through which the elevation member passes when the elevation member is elevated to cover the path of the elevation member, thereby preventing the portion opened to the inside of the drawer part from being exposed. 
     Thus, the space opened into the drawer part may not be exposed to prevent the food or the user&#39;s body from being caught by the foreign body or the foreign body, thereby improving the safety in use and improving the outer appearance. 
     Also, the guide device may be covered by the plurality of shutters that move vertically by the elevation member. In the guide hole is covered, the plurality of shutters as well as the inner surface of the drawer part may be disposed on the same plane to more improve the outer appearance, and the outer plate may be made of the same material as the inner plate that defines the inner side of the drawer part, thereby further improving the outer appearance. 
     Also, the plurality of shutters may move together when the elevation member ascends and when the lifting member descends, the elevation member may move downward by its own weight. Thus, the guide hole may be opened and closed through the simple structure without separate power. 
     Also, the elevation member may have the structure that is capable of being easily separated from the elevation assembly and have the structure that is capable of being detached through the opening of the guide. 
     Thus, the elevation function inside the drawer part may be selectively used. That is, the elevation member may be easily separated if it is desired to increase the capacity of the drawer part without using the elevation function, and the elevation member may be mounted when the elevation function is to be used. The elevation member may be easily attached and detached in the state in which the front panel door part and the drawer part are coupled to each other without separating the entire elevation assembly. 
     Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More particularly, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art.