Abstract:
A refrigerator that includes a storage compartment; a pantry that includes an interior area; an evaporator that is configured to cool air; a cover that is coupled to the evaporator, that is configured to isolate the interior of the pantry from the evaporator, and that includes a through hole, the through hole being configured to enable flow of air from the evaporator to the interior area of the pantry; a duct structure that is coupled to a first surface of the cover, that is configured to cover the through hole, and that includes a cold air vent protruding toward the interior area of the pantry; and a pantry fan that is coupled to the duct structure and that is configured to provide air cooled by the evaporator to the interior area of pantry through the cold air vent of the duct structure is disclosed.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
       [0001]    Pursuant to 35 U.S.C. §119(a), this application claims the benefit of an earlier filing date of and the right of priority to Korean Application No. 10-2016-0004340, filed on Jan. 13, 2016, the contents of which are incorporated by reference herein in its entirety. 
       TECHNICAL FIELD 
       [0002]    The present application generally relates to technologies about a refrigerator. 
       BACKGROUND 
       [0003]    A refrigerator is an appliance for freezing or chilling foodstuffs and storing them in it. The refrigerator consists of a main refrigerator body with a food storage compartment in it and refrigeration cycle equipment for refrigeration. The refrigeration cycle equipment consists of a compressor, a condenser, an expander, and an evaporator. In general, a machine room is provided at the rear of the main refrigerator body, and the compressor and condenser of the refrigeration cycle equipment are installed in the machine room. 
       SUMMARY 
       [0004]    The present disclosure is generally related to a refrigerator. 
         [0005]    In general, one innovative aspect of the subject matter described in this specification can be embodied in a refrigerator including: a storage compartment; a pantry that is located in the storage compartment and that includes an interior area; an evaporator that is coupled to the storage compartment and that is configured to cool air; a cover that is coupled to the evaporator, that is configured to isolate the interior of the pantry from the evaporator, and that includes a through hole, the through hole being configured to enable flow of air from the evaporator to the interior area of the pantry; a duct structure that is coupled to a first surface of the cover, that is configured to cover the through hole, and that includes a cold air vent protruding toward the interior area of the pantry; and a pantry fan that is coupled to the duct structure and that is configured to provide air cooled by the evaporator to the interior area of pantry through the cold air vent of the duct structure. 
         [0006]    The foregoing and other embodiments can each optionally include one or more of the following features, alone or in combination. In particular, one embodiment includes all the following features in combination. The duct structure includes: a perimeter portion that surrounds the cold air vent and that includes a first perimeter portion and a second perimeter portion, and wherein the first perimeter portion protrudes toward the interior area of the pantry more than the second perimeter portion. The cold air vent includes: a first cold air vent that corresponds to the first perimeter portion, and a second cold air vent that corresponds to the second perimeter portion, and wherein either the first cold air vent or the second cold air vent is at least partly blocked. The duct structure includes: a first portion that faces the pantry fan, that is configured to guide air provided from the pantry fan to the cold air vent, and that includes a slope or a curve. The refrigerator further includes a drawer that is located at a first side of the pantry and that includes a first surface facing the duct structure, the first surface including a slope or a curve, wherein the cold air vent is located between the pantry and the drawer. The pantry includes: a first surface that faces the cover and that includes a dented portion, the dented portion being configured to accept the duct structure. The refrigerator further includes a duct insulation part that is coupled between the pantry fan and the duct structure, that is configured to at least partly surround a perimeter of the pantry fan, and that includes a hole, the hole being configured to enable flow of air from the evaporator to the cold air vent. The duct insulation part includes: a first portion that faces the pantry fan and that includes a slope or a curve. The duct insulation part includes: a slot that is located in a bottom area of the duct insulation part and that is configured to drain water through a drainage passage. The duct structure includes: a drainage area that is located in a bottom area of the duct structure and that is configured to collect water drained through the drainage passage. The drainage area includes: a slope that slopes toward the through hole and that is configured to drain water collected in the drainage area. The refrigerator further includes a cover insulation part that is coupled to a second surface of the cover, the cover insulation part including: an opening that is located in an area of the cover insulation part corresponding to the through hole of the cover, and a slot that is located in a bottom area of the cover insulation part and that is configured to drain water through a drainage passage. The refrigerator further includes a drainage area that is located below the cover insulation part and that is configured to collect water drained through the drainage passage. The drainage area includes: a slope that is configured to drain the water collected in the drainage area. The duct structure includes: a drainage area that is located in a bottom area of the duct structure and that is configured to collect water. The drainage area includes: a slope that slopes toward the through hole and that is configured to drain water collected in the drainage area. The pantry fan is an axial fan that is configured to move air in an axial direction. The refrigerator further includes a storage compartment cold air vent that is located on a surface of the storage compartment or on a surface of the cover; a storage compartment fan that is coupled to the surface of the storage compartment or to the surface of the cover and that is configured to move air cooled by the evaporator in a circumferential direction, through the evaporator, to the storage compartment cold air vent; a storage compartment cold airflow path that surrounds a perimeter of the storage compartment fan, and that extends from the perimeter of the storage compartment fan to the storage compartment cold air vent; and a first pantry fan that is located outside the storage compartment cold airflow path and that is configured to provide air cooled by the evaporator to the pantry through a cold airflow path, the cold airflow path being separate from the storage compartment cold airflow path. The evaporator includes: a plurality of refrigerant pipes, each of the plurality of refrigerant pipes including a respective row portion, and a plurality of air intakes that are configured to draw interior air in the interior area of the pantry and provide the interior air to an area adjacent to a second surface of the cover, and wherein the row portions of the plurality of refrigerant pipes includes a first group of row portions that is adjacent to the duct structure and a second group of row portions that is adjacent to the plurality of air intakes. The cover includes: a plurality of ridges that protrude toward the through hole and that support the duct structure. 
         [0007]    The subject matter described in this specification can be implemented in particular embodiments so as to realize one or more of the following advantages. Comparing to a conventional refrigerator, a refrigerator includes a low-temperature food storage space for storing low-temperature food. For example, the low-temperature food storage space can be implemented as a pantry. The cold air generated by heat transfer across the evaporator is moved by the pantry fan and then supplied directly to the pantry via the cold air vent of the duct structure. Thus, the internal temperature of the pantry may be kept lower than the average temperature of the refrigerator compartment. 
         [0008]    In addition, since the cold air vent of the duct structure has a slanted shape, cold air may be supplied to the center of the pantry from the off-centered duct structure. Also, since the part of the duct structure is blocked, cold air may be supplied to the center of the pantry from the off-centered duct structure. 
         [0009]    The duct structure slopes or curves down from the pantry fan, and this makes enough space for cold airflow at the front of the pantry fan. This prevents cold air, which is supposed to be supplied to the pantry, from flowing backwards due to the suction force of the fan of the food storage compartment, and cold air may be moved by the pantry fan and supplied directly to the pantry. Also, the back wall of the drawer facing the outside of the duct structure slopes or curves, corresponding to the front portion of the duct structure, thereby preventing structural interference between the duct structure and the drawer. 
         [0010]    Furthermore, the duct insulation slopes or curves down from the pantry fan, and this makes enough space for cold airflow at the front of the pantry fan. This prevents cold air, which is supposed to be supplied to the pantry, from flowing backwards due to the suction force of the fan of the food storage compartment, and cold air may be moved by the pantry fan and supplied directly to the pantry. 
         [0011]    At least part of the duct structure, duct insulation, and cover insulation have a drainage passage or drainage area, and this prevents malfunction because water collected in a component for supplying cold air to the pantry is released immediately. 
         [0012]    A cold airflow path for supplying cold air directly to the pantry and a food storage compartment cold airflow path for supplying cold air to the food storage compartment are in a dual configuration. This can solve the problem of cold air loss, which may occur in a single cold airflow path configuration, and allows large enough volumes of cold air to the food storage compartment and the pantry. 
         [0013]    An evaporator consisting of a plurality of rows includes upper rows and lower rows, and the duct structure is positioned to correspond to the upper rows and the air intakes are positioned to correspond to the lower rows. With this structure, the air drawn into the evaporator from the pantry may get cold by heat transfer across the evaporator for a sufficient amount of time, and the cold air may be circulated back through the duct structure. 
         [0014]    The details of one or more embodiments of the subject matter of this specification are set forth in the accompanying drawings and the description below. Other features, aspects, and advantages of the subject matter will become apparent from the description, the drawings, and the claims. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0015]      FIG. 1  is a diagram illustrating an example refrigerator. 
           [0016]      FIGS. 2 and 3  are diagrams illustrating an example interior of a refrigerator compartment. 
           [0017]      FIG. 4  is a diagram illustrating an example second cover and an example duct structure of a refrigerator compartment. 
           [0018]      FIG. 5  is a diagram illustrating an example interior of a second cover and a duct structure of a refrigerator compartment. 
           [0019]      FIG. 6  is a diagram illustrating an example second cover and an example duct structure. 
           [0020]      FIG. 7  is a diagram illustrating an example interior of a refrigerator compartment. 
           [0021]      FIG. 8  is a diagram illustrating an example refrigerator compartment. 
           [0022]      FIG. 9  is a diagram illustrating an example duct structure. 
       
    
    
       [0023]    Like reference numbers and designations in the various drawings indicate like elements. 
       DETAILED DESCRIPTION 
       [0024]      FIG. 1  illustrates an example refrigerator  1000 . The exterior of a refrigerator  1000  is formed by a main refrigerator body  1100  and doors  1311 ,  1312 ,  1321 , and  1322 . The main refrigerator body  1100  includes an outer casing  1110  and an inner casing  1120 . 
         [0025]    The outer casing  1110  forms the exterior of the refrigerator  1000  except the front of the refrigerator  1000  formed by the doors  1311 ,  1312 ,  1321 , and  1322 . The top and side of the refrigerator  1000  shown in  FIG. 1  all correspond to the outer casing  1110 . 
         [0026]    The inner casing  1120  is located within the main refrigerator body  1100 . The inner casing  1120  forms a food storage compartment  1200  in the refrigerator  1000 . The food storage compartment  1200  may be divided into a refrigerator compartment  1210  and a freezer compartment  1220  based on temperature setting. 
         [0027]      FIG. 1  shows a bottom freezer type refrigerator  1000  which has a refrigerator compartment  1210  provided in the upper part of the refrigerator  1100  and a freezer compartment  1220  provided in the lower part. In some implementations, the refrigerator can be a side-by-side type refrigerator with a refrigerator compartment and a freezer compartment that are respectively located on the left side and the right side. In some other implementations, the refrigerator can be a top mount type refrigerator with a freezer compartment located over a refrigerator compartment. The refrigerator can be any type of refrigerator and not limited to the examples described above. 
         [0028]    The inner casing  1120  forms the inside walls of the food storage compartment  1200 . The inner casing  1120  may be divided based on position. For instance,  FIG. 1  illustrates the refrigerator compartment  1200 ′s sidewalls and back wall. 
         [0029]    The insulation  1130  (see  FIG. 7 ) fills in the space between the outer casing  1110  and the inner casing  1120 . The insulation is formed by a foaming process. 
         [0030]    Covers  1140  and  1150  (see  FIG. 2 ) is attached to the back wall of the refrigerator compartment  1210 . The covers  1140  and  1150  (see  FIG. 2 ) include a first cover  1140  and a second cover  1150  (see  FIG. 2 ). The second cover, although not shown in  FIG. 1  because it is blocked by a drawer  1520  and a pantry  1530 , is shown in the figures to be discussed later (e.g.,  FIG. 2 ). The space behind the refrigerator compartment  1120  is visually blocked by the back wall and the cover  1140  and  1150  (see  FIG. 2 ). 
         [0031]    A refrigerator compartment cold airflow path  1147  (see  FIG. 5 ) for supplying cold air to the refrigerator compartment  1210  is provided in the space visually blocked by the first cover  1140 . The first cover  1140  has refrigerator compartment cold air vents  1141  and  1142  that open towards the food storage compartment  1200 . A refrigerator compartment fan  1160  (see  FIGS. 5 and 8 ) is installed at the back of the first cover  1140 , and the cold air generated by the refrigerator compartment fan flows along the refrigerator compartment airflow path  1147  behind the first cover  1140 , and is supplied to the refrigerator compartment  1210  via the refrigerator compartment cold air vents  1141  and  1142 . 
         [0032]    The configuration of the refrigerator compartment cold airflow path, refrigerator compartment fan, and refrigerator compartment cold air vents may also apply to cold air supply to the freezer compartment. In this case, the components of the freezer compartment may be named a freezing compartment cold airflow path, a freezing compartment fan, and freezing compartment cold air vents. Also, the term “food storage compartment airflow path” may encompass the refrigerator compartment airflow path and the freezer compartment airflow path, the term “food storage compartment fan” may encompass the refrigerator compartment fan and the freezer compartment fan, and the term “food storage compartment cold air vents may encompass the refrigerator compartment cold air vents and the freezer compartment cold air vents. 
         [0033]    The doors  1311 ,  1312 ,  1321 , and  1322  are connected to the main refrigerator body  1100 , and form the exterior of the front of the refrigerator  1000 . The doors  1311 ,  1312 ,  1321 , and  1322  are configured to open or close front openings of the main refrigerator body  1100 . The doors  1311 ,  1312 ,  1321 , and  1322  may be classified as swing doors or drawer-type doors. The swing doors are installed to swing on the main refrigerator body  1100 , and the drawer-type doors are slidably connected to the main refrigerator body  1100 . 
         [0034]    The doors  1311 ,  1312 ,  1321 , and  1322  may be classified based on installation position. Doors that open or close the refrigerator compartment  1210  may be classified as refrigerator compartment doors  1311  and  1312 , and doors that open or close the freezer compartment  1220  may be classified as freezer compartment doors  1321  and  1322 . Also, the doors  1311 ,  1312 ,  1321 , and  1322  may be classified as a left refrigerator compartment door  1311 , a right refrigerator compartment door  1312 , a left freezer compartment door  1321 , and a right freezer compartment door  1322 , respectively, depending on whether they are installed on the left or right side. 
         [0035]    The doors  1311 ,  1312 ,  1321 , and  1322  have door liners  1311   a,    1312   a,    1321   a  and  1322   a  on the inside, and gaskets  1311   b,    1312   b,    1321   b  and  1322   b  for preventing leakage of cool air are installed around the perimeters of the door liners  1311   a,    1312   a,    1321   a  and  1322   a.  The door liners  1311   a,    1312   a,    1321   a  and  1322   a,  along with baskets  1540  to be described later, form a storage space for food. The gaskets  1311   b,    1312   b,    1321   b  and  1322   b  are pressed tightly against the front edges of the main refrigerator body  1100  to seal the food storage compartment  1200 . 
         [0036]      FIG. 1  illustrates swing doors  1311 ,  1312 ,  1321 , and  1322  which are installed to swing on the main refrigerator body  1100 . The refrigerator  1000  has hinges  1411 ,  1412 ,  1421 ,  1422 ,  1431 , and  1432  for allowing the swinging of the doors  1311 ,  1312 ,  1321 , and  1322 . 
         [0037]    The hinges  1411 ,  1412 ,  1421 ,  1422 ,  1431 , and  1432  are classified as upper hinges  1411  and  1412 , middle hinges  1421  and  1422 , and lower hinges  1431  and  1432  based on installation position. Referring to  FIG. 1 , the upper hinges  1411  and  1412  are installed on the top of the main refrigerator body  1100 . The middle hinges  1421  and  1422  are installed between the refrigerator compartment doors  1311  and the freezer compartment doors  1321  and  1322 . The lower hinges  1431  and  1432  are installed under the freezer compartment doors  1321  and  1322 . 
         [0038]    The upper hinges  1411  and  1412  and the middle hinges  1421  and  1422  are connected to the top and bottom of the refrigerator compartment doors  1311  and  1312 , respectively, and allow the swinging of the refrigerator compartment doors  1311  and  1312 . Also, the middle hinges  1421  and  1422  and the lower hinges  1431  and  1432  are connected to the top and bottom of the freezer compartment doors  1321  and  1322 , respectively, and allow the swinging of the freezer compartment doors  1321  and  1322 . 
         [0039]    The refrigerator  1000  has at least one storage unit  1500  for efficient space utilization in the food storage compartment  1200 . The storage unit  1500  is a concept that includes a shelf  1510 , a drawer (or tray)  1520 , a pantry  1530 , and baskets  1540 . The shelf  1510 , the drawer  1520 , and the pantry  1530  may be installed in the food storage compartment  1200 , and the baskets  1540  may be installed on the inside of the doors  1311 ,  1312 ,  1321 , and  1322 . 
         [0040]    The shelf  1510  is shaped in the form of a plate. The shelf  1510  is installed horizontally to the food storage compartment  1200  so as to place food on top of them. A shelf holder  1146  is installed on the back wall of the food storage compartment  1200  or the covers  1140 , and the shelf  1510  may be placed on the shelf holder  1146 . 
         [0041]    The drawer  1520  and the pantry  1530  each are configured to form a space separate from other parts of the food storage compartment  1200  and store food in it. The drawer  1520  and the pantry  1530  may be configured to slide, and may be inserted into or out of the food storage compartment  1200  by sliding movement. 
         [0042]    The width of a drawer  1520  is narrower than the width of the food storage compartment  1200 , and two drawers may be placed side by side on the left and right sides. By contrast, the pantry  1530  has a width corresponding to the width of the food storage compartment  1200 , and is smaller in height than the drawer  1520 . 
         [0043]    Despite these differences, the drawer  1520  and the pantry  1530  cannot be seen as clearly distinct and separate, because the drawer  1520  and the pantry  1530  have something in common in that they form a space separate from other areas and are slidable. Thus, the drawer  1520  and the pantry  1530  can be reversed. Also, one of the two may be named a first drawer (or first pantry), and the other may be named a second drawer (or second pantry). The drawer  1520  or the pantry  1530  is sometimes named a tray. 
         [0044]    In some implementations, a slidable part of the storage unit  1500  that is located on the base of the refrigerator compartment  1210  or freezer compartment  1220  is referred to as the pantry  1530 , and a slidable part of the storage unit  1500  except the pantry  1530  is referred to as the drawer  1520 . 
         [0045]    The intended uses of the drawer  1520  and the pantry  1530  may be determined according to the refrigerator user&#39;s intention, and the user&#39;s intention may be determined according to the internal temperatures of the drawer  1520  and the pantry  1530 . If the temperature drawer  1520  and the pantry  1530  are the same internal temperature, the drawer  1520  and the pantry  1530  do not need to be functionally separated from each other. In some implementations, if the drawer  1520  and the pantry  1530  are different internal temperatures, the drawer  1520  and the pantry  1530  each should keep different types of food in them, and the drawer  1520  and the pantry  1530  need to be functionally separated from each other. 
         [0046]    The user of the refrigerator  1000  tends to use the refrigerator compartment  1210  more often than the freezer compartment  1220 . Thus, the user of the refrigerator  1000  keeps foods in the refrigerator compartment even if they are supposed to be kept frozen in the freezer compartment  1220 . However, these food items will spoil easily if the refrigerator compartment  1210  maintains a uniform temperature throughout the entire space of the refrigerator compartment  1210 . 
         [0047]    In some implementations, the internal temperature of the pantry  1530  is lower than the average temperature of the refrigerator compartment  1210  so as to keep food items that should be kept frozen from spoiling easily even when they are preserved in the refrigerator compartment  1210 . For example, if the average temperature of the refrigerator compartment  1210  including the drawer  1520  is kept at about 3□, the internal temperature of the pantry  1530  may be kept at about −1□. Accordingly, the drawer  1520  is used for preserving fresh food such as vegetables, and the pantry  1530  is used for preserving food such as meat that should be kept frozen. The internal temperature of the pantry  1530 , which is lower than the temperature of other areas in the refrigerator compartment  1210 , may help further prevent foods from spoiling even if they are those types of food that spoil easily at usual temperatures for the refrigerator compartment  1210 . 
         [0048]    While the refrigerator compartment  1210  and the freezer compartment  1220  are spatially distinct from each other by an insulation barrier  1230 , the pantry  1530  is installed within the refrigerator compartment  1210  (or freezer compartment  1220 ) and therefore hardly seen as spatially distinct from other areas of the refrigerator compartment  1210 . For instance, the cold air in the refrigerator compartment  1210  does not flow into the freezer compartment  1220  by natural flow, whereas the cold air in the pantry  1530  may flow into other areas of the refrigerator compartment  1210  by natural flow when pulled out by sliding it. Thus, additional components are required in order to make the internal temperature of the pantry  1530  lower than the temperatures of other areas of the refrigerator compartment  1210 . The components that can keep the internal temperature of the pantry  1530  lower than the temperatures of other areas of the refrigerator compartment  1210  will be described with reference to  FIG. 2  and the subsequent figures. 
         [0049]    The baskets  1540  form barriers that keep food from falling off the doors  1311 ,  1312 ,  1321 , and  1322 . The door liners  1311   a,    1312   a,    1321   a,  and  1322   a  are located on the inside of the doors  1311 ,  1312 ,  1321 , and  1322 , and the baskets  1540  are attached to the door liners  1311   a,    1312   a,    1321   a,  and  1322   a.  The door liners  1311   a,    1312   a,    1321   a,  and  1322   a  form a base and inside walls for storing food, and the baskets  1540  form outside walls. 
         [0050]      FIGS. 2 and 3  illustrate an example interior (portion A) of a refrigerator compartment. For example, the refrigerator compartment in  FIGS. 2 and 3  can be the refrigerator compartment  1210  in  FIG. 1 . In  FIG. 3 , the left drawer  1521  is pulled out. 
         [0051]    1. Covers 
         [0052]    The covers  1140  and  1150  include a first cover  1140  and a second cover  1150 . The first cover  1140  has been described above with reference to  FIG. 1 . 
         [0053]    The second cover  1150  is located under the first cover  1140 . The second cover  1150  is attached to the back wall of the refrigerator compartment. An evaporator  1800  is installed at the back of the second cover  1150 , and the second cover  1150  blocks the evaporator  1800 . The second cover  1150  spatially divides the space where the evaporator  1800  is installed and the refrigerator compartment. 
         [0054]    The second cover  1150  has a first portion  1151   a  and a second portion  1151   b.    
         [0055]    The first portion  1151   a  extends in a direction in which it gets farther from the back wall of the refrigerator compartment. The first portion  1151   a  may slope down from the back wall, as shown in  FIGS. 2 and 3 . The first portion  1151   a  may be attached to the first cover  1140 , partially corresponding to the lower end of the first cover  1140 . 
         [0056]    The second portion  1151   b  extends vertically from the lower end of the first portion  1151   a  to the base of the refrigerator compartment. The second portion  1151   b  is positioned to face the drawer  1520  and the pantry  1530 . The first portion  1151   a  and the second portion  1151   b  allow for making room for installing the evaporator  1800  between the back wall of the refrigerator compartment and the second cover  1150 . 
         [0057]    2. Storage Unit 
         [0058]    (1) Pantry 
         [0059]    The pantry  1530  is located on the base of the refrigerator compartment (or freezer compartment). The pantry  1530  has a width corresponding to the width of the refrigerator compartment. 
         [0060]    The pantry  1530  may be inserted into or out of the refrigerator compartment by sliding movement. Referring to  FIG. 2 , for the sliding movement of the pantry  1530 , a sliding portion  1533  and a roller  1534  are provided on both sidewalls  1531  of the pantry  1530 . 
         [0061]    The sliding portion  1533  protrudes towards the sidewalls of the refrigerator compartment from the two sidewalls  1531  of the pantry  1530 , and extends in the sliding direction of the pantry  1530 . The sliding direction of the pantry  1530  denotes the direction in which the pantry  1430  is inserted into or pulled out of the refrigerator compartment. 
         [0062]    The sliding portion  1533  may be formed integral with the sidewalls  1531  and back wall  1532  of the pantry  1530  by injection molding. The sliding portion  1533  may have a deformation preventing portion  1533   a  to prevent deformation of the sliding portion  1533  that might occur after the injection molding. A plurality of deformation preventing portions  1533   a  may be provided and spaced at intervals. The deformation preventing portion  1533   a  may extend vertically and connect to the upper and lower edges of the sliding portion  1533 . 
         [0063]    The roller  1534  is installed at the rearmost part of the sidewalls  1531  of the pantry  1530 . A projecting portion  1531 ′ may be formed at the rearmost part of the left and right sidewalls  1531  of the pantry  1530 . The projecting portion  1531 ′ may be understood as protruding from the back wall  1532 . The roller  1534  may be installed at the projecting portion  1531 ′. 
         [0064]    The roller  1534  may be spaced apart from the sliding portion  1533 . The roller  1534  is rotatable on the axis of rotation. A sliding projection, instead of the roller  1534 , may be formed depending on the type of refrigerator. The sliding projection protrudes towards the sidewalls of the refrigerator compartment from the two sidewalls  1531  of the pantry  1530 . 
         [0065]    Referring to  FIG. 3 , a sliding rail  1570  for establishing a sliding path for the pantry  1530  is installed on the two sidewalls of the refrigerator compartment.  FIG. 3  illustrates the rear of the sliding rail  1570 . The sliding rail  1570  has a rail portion  1571  and a deformation preventing portion  1572 . 
         [0066]    The rail portion  1572  is configured to receive the roller  1534  and sliding portion  1533  of the pantry  1530 . The rail portion  1571  extends in the sliding direction of the pantry  1530 . 
         [0067]    A plurality of deformation preventing portions  1572  may be provided and spaced at intervals. The deformation preventing portion  1572  may extend vertically and connect to the upper and lower edges of the sliding rail  1570 . The deformation preventing portion  1572  of the sliding rail  1570 , like the deformation preventing portion  1533   a  of the pantry  1530 , is a component for preventing deformation of the sliding rail  1570  after injection molding. 
         [0068]    Although not shown in  FIG. 3 , the sliding rail  1570  may have a roller at the entrance of the rail portion  1571 , and the roller may rotate on the axis of rotation. 
         [0069]    The sliding portion  1533  and roller  1534  of the pantry  1530  are inserted into the rail portion  1571 . The roller  1534  rotates within the rail portion  1571 , and the sliding portion  1533  slides along the rail portion  1571 . In this way, the sliding movement of the pantry  1530  may be achieved. 
         [0070]    The sidewalls  1531  of the pantry  1530  are spaced apart from the sidewalls of the refrigerator compartment in order to make room for the sliding portion  1533  and the sliding rail  1570 , and the back wall  1532  of the pantry  1530  is spaced apart from the second cover  1150  in order to make room for air intakes  1152   a  and  1152   b  (see  FIGS. 4 to 8 ). The cold air in the pantry  1530  might escape out of the pantry  1530  through the gaps between the pantry  1530  and the refrigerator compartment and second cover  1150 . 
         [0071]    To prevent cold air from escaping, the sidewalls  1531  of the pantry  1530  may be curved and protrude towards the sidewalls of the refrigerator compartment, and the back wall  1532  of the pantry  1530  may be curved and protrude towards the second cover  1150 . The curved and protruding sidewalls  1531  and back wall  1532  of the pantry  1530  may block the gaps and keep cold air from escaping. 
         [0072]    The back wall  1532  of the pantry  1530  is positioned to face the second cover  1150 . Referring to  FIG. 3 , the back wall  1532  may include a dented portion. This dented portion is illustrated as a cold air vent area  1532   a.  The cold air vent area  1532   a  of the back wall  1532  may be set lower than other portions of the back wall  1532  and be configured to accept the duct structure  1600 . A cold air vent  1630  of the duct structure  1600  is located in the cold air vent area  1532   a  which protrudes from a base portion  1610  and is provided at the back wall  1532 . 
         [0073]    (2) Drawer 
         [0074]    The drawer  1520  is located above the pantry  1530 . The drawer  1520  includes a left drawer  1521  and a left drawer  1522 , and the left drawer  1521  and the right drawer  1522  may be placed side by side on the left and right sides. The width of the left drawer  1521  and the right drawer  1522  is narrower than the width of the refrigerator compartment. 
         [0075]    The drawer  1520  is configured to be inserted into or pulled out of the refrigerator compartment by sliding movement. Referring to  FIG. 2 , the left drawer  1521 , like the pantry  1530 , has a sliding portion  1521   a  and a roller  1521   d  for sliding movement. A sliding structure of the left drawer  1521  to be described below also applies to the right drawer  1522 . 
         [0076]    The sliding portion  1521   a  protrudes from the two sidewalls  1521   b  of the left drawer  1521 , and extends in the sliding direction of the left drawer  1521 . The sliding direction of the left drawer  1520  denotes the direction in which the left drawer  1521  is inserted into or pulled out of the refrigerator compartment. 
         [0077]    The sliding portion  1521   a  may be formed integral with the sidewalls  1521   b  and back wall  1521   c  of the left drawer  1521  by injection molding. The sliding portion  1521   a  may have a deformation preventing portion  1521   a ′ to prevent deformation of the sliding portion  1521   a  that might occur after the injection molding. A plurality of deformation preventing portions  1521   a ′ may be provided and spaced at intervals. The deformation preventing portion  1521   a ′ may extend vertically and connect to the upper and lower edges around the deformation preventing portion  1521   a′.    
         [0078]    The roller  1521   d  is installed at the rearmost part of the sidewalls  1521   b  of the drawer  1520 . A projecting portion  1521   b ′ may be formed at the rearmost part of the left and right sidewalls  1521   b  of the drawer  1520 . The projecting portion  1521   b ′ may be understood as protruding from a sloping portion of the back wall  1521   c.  The roller  1521   d  may be installed at the projecting portion  1521   b ′. The roller  1521   d  may be spaced apart from the sliding portion  1521   a.  The roller  1521   d  is rotatable on the axis of rotation. A sliding projection, instead of the roller  1521   d,  may be formed depending on the type of refrigerator. The sliding projection protrudes from the sidewalls  1521   b  of the drawer  1520 . 
         [0079]    A sliding rail  1560  for establishing a sliding path for the drawer  1520  is installed on and between the two sidewalls of the refrigerator compartment. Although the sliding rail for sliding the drawer  1520  is not revealed in  FIG. 2 ,  FIG. 3  illustrates the sliding rail  1560  installed between the left drawer  1521  and the right drawer  1522 . The sliding rail installed on the two sidewalls of the refrigerator compartment has a substantially similar structure to the sliding rail  1560  between the left drawer  1521  and the right drawer  1522 . 
         [0080]    The sliding rail  1560  between the left drawer  1521  and the right drawer  1522  is installed on the second cover  1150 , and protrudes towards the front of the refrigerator from the second cover  1150 . The sliding rail  1560  between the left drawer  1521  and the right drawer  1522  may be supported by a partition  1550  between the drawer  1520  and the pantry  1530 . 
         [0081]    The sliding rail  1560  has a rail portion  1561 , a roller  1562 , and a deformation preventing portion  1563 . 
         [0082]    The rail portion  1561  is configured to receive the roller  1521   d  and sliding portion  1521   a  of the drawer  1520 . The rail portion  1561  extends in the sliding direction of the drawer  1520 . 
         [0083]    The roller  1562  is installed at the entrance of the rail portion  1561 , and rotates on the axis of rotation. The sliding portion  1521   a  of the drawer  1520  may be placed on the roller  1562  of the sliding rail  1560  and slide on it. 
         [0084]    A plurality of deformation preventing portions  1563  may be provided and spaced at intervals. The deformation preventing portion  1563  may extend vertically and connect to the upper and lower edges around the deformation preventing portion  1563 . The deformation preventing portion  1563  of the sliding rail  1560 , like the deformation preventing portion  1521   a  of the pantry  1520 , is a component for preventing deformation of the sliding rail  1560  after injection molding. 
         [0085]    The roller  1521   d  and sliding portion  1521   a  of the drawer  1520  are inserted into the rail portion  1561  of the sliding rail  1560 . The roller  1521   d  rotates within the rail portion  1561 , and the sliding portion  1521   a  slides along the rail portion  1561 . In this way, the sliding movement of the drawer  1520  may be achieved. 
         [0086]    A duct structure  1600  to be described later is installed behind the drawer  1520 . The duct structure  1600  has a front portion  1620 , and at least part of the front portion  1620  slopes or curves. The back wall  1521   c  of the drawer  1520  may slope or curve, either partially or wholly, corresponding to the front portion  1620  of the duct structure  1600 .  FIG. 2  illustrates the sloping back wall  1521   c  of the drawer  1520 . The sloping or curving shape of the back wall  1521   c  of the drawer  1520  is for preventing interference with the duct structure  1600 . 
         [0087]    (3) Partition 
         [0088]    The partition  1550  is installed between the drawer  1520  and the pantry  1530 . The partition  1550  is shaped in the form of a plate so as to cover the top of the pantry  1530 . The left and right sides of the partition  1550  may be supported by the two sidewalls of the refrigerator compartment, and the back of the partition  1550  may be supported by the second cover  1150 . 
         [0089]    A recess portion  1551  may be formed at the back of the partition  1550  so that the duct structure  1600  is located on it. The recess portion  1551  may be formed by recessing the partition  1550  into a shape corresponding to the duct structure  1600  protruding from the second cover  1150 . 
         [0090]    When the pantry  1530  is inserted into the refrigerator compartment by sliding it, the front portion of the pantry  1530  comes into close contact with the partition  1550 . The front portion of the pantry  1530  refers to the portion where a handle  1535  of the pantry  1530  is formed. As the partition  1550  is in close contact with the front portion of the pantry  1530 , the cold air in the pantry  1530  is kept from escaping to other areas in the refrigerator compartment. 
         [0091]    A space defined by the partition  1550 , the front portion of the pantry  1530 , the base and two sidewalls of the refrigerator compartment, and the second cover  1150  may be referred to as the internal space of the pantry  1530 . The internal space of the pantry  1530  may be separate from other spaces in the refrigerator compartment. Since the internal space of the pantry  1530  is separate from other spaces in the refrigerator compartment, the internal temperature of the pantry  1530  may be kept lower than the average temperature of the refrigerator compartment. 
         [0092]    3. Duct Structure 
         [0093]    The duct structure  1600  is attached to the front of the second cover  1150 . Referring to  FIG. 5  to be described later, a through hole  1155  is formed in the second cover  1150 . The through hole  1155  is positioned to face the evaporator  1800 . The duct structure  1600  is attached to the front of the second cover  1150  to cover the through hole  1155 . 
         [0094]    Referring to an enlarged view of the exterior appearance of the duct structure  1600  shown in  FIG. 3 , the duct structure  1600  includes a base portion  1610 , a front portion  1620 , and a cold air vent  1630 . The duct structure  1600  additionally includes a temperature sensor receiving portion  1640 , a cold air inlet/outlet  1641 , a wire receiving portion  1650 , a wire receiving groove  1660 , and an attaching portion  1671 ,  1672 , and  1673 . 
         [0095]    The base portion  1610  forms the perimeter of the duct structure  1600 . The other components of the duct structure  1600 , including the front portion  1620 , the cold air vent  1630 , protrude from the base portion  1610 . 
         [0096]    The base portion  1610  is attachable to the second cover  1150 . The attaching portion  1671 ,  1672 , and  1673  is provided on the base portion  1610 . The attaching portion  1671 ,  1672 , and  1673  is a concept that includes the components for attaching the duct structure  1600  to the second cover  1150 . The attaching portion  1671 ,  1672 , and  1673  includes attaching projections  1671  and  1672  and a fastener insertion part  1673 . 
         [0097]    The attaching projections  1671  and  1672  may be formed on one side or both sides of the base portion  1610 . Referring to the duct structure  1600  of  FIG. 3 , the two attaching projections  1671  on the left side protrude out of the duct structure  1600  from the base portion  1610 , and the attaching projection  1672  on the right side is formed by cutting part of the base portion  1610 . The shapes and configurations of the attaching projections  1671  on the left side and the attaching projection  1672  on the right side may be reversed. 
         [0098]    Attaching projection receiving portions  1153  are formed in the second cover  1150 , and the attaching protrusion receiving portions  1153  are configured to receive the attaching projections  1671  and  1672  of the duct structure  1600 . When the attaching projections  1671  and  1672  are inserted into the attaching projection receiving portions  1163 , the duct structure  1600  is temporarily fixed to the second cover  1150 . 
         [0099]    The duct structure  1600  is permanently fixed by a fastener. The fastener insertion portion  1673  protrudes from the base portion  1610 , and receives the fastener. When the fastener is inserted into the fastener insertion portion  1673  and fastened to the second cover  1150 , the duct structure  1600  and the second cover  1150  are permanently fixed. 
         [0100]    The duct structure  1600  includes the front portion  1620  protruding from the base portion  1610 . The front portion  1620  of the duct structure  1600  is positioned to face the front of a pantry fan  1900  (see  FIG. 5 ) to be described later. The pantry fan is installed inside the duct structure  1600 . The inside of the front portion  1620  faces the pantry fan, and the outside of the front portion  1620  faces the drawer  1520  or the partition  1550 . The front portion of  FIG. 3  corresponds to the outside. 
         [0101]    At least part of the front portion  1620  may slope or curve down from the pantry fan. It can be said that, since the cold air vent  1630  is formed under the front portion  1620 , at least part of the front portion  1620  slopes or curves down towards the cold air vent  1630  from the pantry fan. 
         [0102]    The front portion  1620  slopes or curves down so as to create a cold air flow space between the front portion  1620  and the pantry fan as the front portion  1620  gets farther from the pantry fan and to let cold air out to the cold air vent  1630  of the duct structure  1600  through the cold air flow space. 
         [0103]    Referring to  FIG. 5 , the refrigerator compartment fan  1160  is located behind the second cover  1150 , and the refrigerator compartment fan  1160  is a centrifugal fan. The centrifugal fan blows air in a circumferential direction by centrifugal force generated from inside the blades. On the contrary, the pantry fan is an axial fan, and the axial fan blows air in an axial direction. The centrifugal fan is configured to blow large volumes of air by a stronger suction force than the axial fan. Thus, cold air may be drawn in by the operation of the refrigerator compartment fan  1160 , rather than being released via the cold air vent  1630 , unless there is a large enough space for cold airflow between the pantry fan and the duct structure  1600 . 
         [0104]    Nevertheless, a large enough space for cold airflow may be created between the pantry fan and the duct structure  1600  since the front portion  1620  of the duct structure  1600  slopes or curves down from the pantry fan. With the front portion  1620  of the duct structure  1600  sloping or curving down, the cold airflow caused by the pantry fan may be naturally released via the cold air vent  1630  under the front portion  1620 , and the structure of the front portion  1620  may help prevent reverse flow of cold air. 
         [0105]    The sloping angle or curvature of the front portion  1620  may not be constant. For example, referring to  FIG. 3 , it can be seen that the sloping angle of the front portion  1620  changes at a certain point and the front portion  1620  slopes more steeply down this point. An inflection point may also exist in a case where the front portion  1620  slopes. 
         [0106]    As explained above, the back wall  1521   c  of the drawer  1520  also slopes or curves, corresponding to the sloping or curving shape of the front portion  1620 . 
         [0107]    The cold air vent  1630  protrudes towards the pantry  1530 . The cold air vent  1630  sits at a height midway between the pantry  1530  and the drawer  1520 . The cold air vent area  1532   a  is formed on the back wall  1532   a  of the pantry  1530 , and the cold air vent  1630  is located in the cold air vent area  1532   a.    
         [0108]    The perimeter  1631  and  1632  of the cold air vent  1630  protrudes from the front portion  1620  or the base portion  1610 . Either the left perimeter  1631  or the right perimeter  1632  protrudes further than the other so that the cold air vent  1630  opens in an oblique direction. In this way, the cold air vent  1630  may be slanted towards the center of the pantry  1530 . 
         [0109]    The duct structure  1600  is positioned to face the evaporator  1800  to supply the cold air generated by the evaporator  1800  (see  FIG. 5 ) directly into the pantry  1530 , and the evaporator  1800  is located off-center to one side (eccentrically to one side) behind the second cover  1150 . As well as the evaporator, a variety of parts for running the refrigerator, such as a printed circuit board, are installed behind the second cover  1150 , which makes it difficult to locate the evaporator at the center. Also, the evaporator  1800  should be placed off-center to one side, especially in order to prevent the evaporator and the refrigerator compartment cold airflow path  1147  from interfering with each other. 
         [0110]    The duct structure  1600 , too, is located off-center to one side of the refrigerator to correspond to the position of the evaporator. Also, the duct structure  1600  should be located off-center to one side of the refrigerator compartment, especially in order to prevent the drawer  1520  from interfering with the sliding rail  1560  for sliding movement. 
         [0111]    With the duct structure  1600  located off-center, the cold air coming from the cold air vent  1630  of the duct structure  1600  might be supplied mostly to one side, rather than uniformly throughout the inside of the pantry  1530 . To solve this problem, the cold air vent  1630  of the duct structure  1600  may be slanted towards the center of the pantry  1530 . Cold air may be supplied towards the center of the pantry  1530  due to the slanted shape of the cold air vent  1630 , uniformly throughout the inside of the pantry  1530 . 
         [0112]    The temperature sensor receiving portion  1640  is provided on one side (right side of  FIG. 3 ) of the cold air vent  1630 . The temperature sensor receiving portion  1640  protrudes from the base portion  1610 , and receives a temperature sensor in it. The temperature sensor receiving portion  1640  has the cold air inlet/outlet  1641  to allow the cold air in the pantry  1530  to flow into the temperature sensor receiving portion  1640 . While the cold air vent  1630  is a component for forcing cold air out by the pantry fan  1900 , the cold air inlet/outlet  1641  is a component for bringing the cold air in the pantry  1530  into contact with the temperature sensor by natural movement. 
         [0113]    If the temperature inside the pantry  1530  rises higher than a set temperature, the evaporator and the pantry fan are run to supply cold air to the space in the pantry  1530 , and therefore the temperature inside the pantry  1530  may decrease back to the set temperature. Whether to run the evaporator and the pantry fan or not is determined by the temperature inside the pantry  1530  measured by the temperature sensor. 
         [0114]    The wire receiving portion  1650  and the wire receiving groove  1660  form a wire area that supplies the power required for running the pantry fan  1900 . The power receiving portion  1650  may protrude from the base portion  1610 , and be provided on one side of the front portion  1620 . The wire receiving groove  1660  may be formed in an area where a wire extends out of the duct structure  1600  past the base portion  1610 . Placing a wire in the wire receiving portion  1650  and the wire receiving groove  1660  may prevent wire breakage even if the duct structure  1600  is in close contact with the second cover  1150 . 
         [0115]    While the configuration of the above-explained covers  1140  and  1150 , drawer  1520 , pantry  1530 , partition  1550 , and duct structure  1600  have been described with respect to the refrigerator compartment, they may also apply to the freezer compartment. 
         [0116]      FIG. 4  illustrates an example second cover and an example duct structure of a refrigerator compartment. In  FIG. 4 , the storage unit of  FIG. 2  is entirely removed.  FIG. 5  illustrates an example interior of a second cover and a duct structure of a refrigerator compartment. 
         [0117]    Referring to  FIG. 4 , the first cover  1140  includes a plurality of cold air vents  1141 ,  1142 ,  1143 , and  1144  and a shelf holder receiving portion  1145 . The second cover  1150  includes a fastener insertion portion  1154   a  for fixing to the back wall of the refrigerator compartment. The fastener insertion portion  1154   a  is configured to receive a fastener that is inserted into the fastener insertion portion  1154   a,  and the fastener includes a screw, for example. Air intakes  1152   a  and  1152   b  are formed below the second cover  1150 , and the duct structure  1600  is attached to the front of the second cover  1150 , with a height difference with the air intakes  1152   a  and  1152   b.  The air intakes  1152   a  and  1152   b  are configured to draw in air from inside the pantry  1530  to the space behind the second cover  1150 . 
         [0118]    Referring to  FIG. 5 , the refrigerator compartment cold airflow path  1147  is formed behind the first cover  1140 , and the refrigerator compartment fan  1160  and the evaporator  1800  are installed behind the second cover  1150 . The second cover  1150  is configured to block the evaporator  1800 . The second cover  1150  includes a through hole  1155  that is positioned to face the evaporator  1800 . 
         [0119]    Referring to  FIGS. 4 and 5 , the duct structure  1600  is attached to the front of the second cover  1150  to cover the through hole  1155 . The pantry fan  1900  is installed inside the duct structure  1600  and positioned to face the evaporator  1800 . 
         [0120]    The refrigerator compartment cold air vents  1141 ,  1142 ,  1143 , and  1144  open towards the refrigerator compartment. While  FIGS. 4 and 5  illustrate that the refrigerator compartment cold air vents  1141 ,  1142 ,  1143 , and  1144  are formed in the first cover  1140 , they also may be formed on the back wall of the refrigerator compartment. The refrigerator compartment cold air vents  1141 ,  1142 ,  1143 , and  1144  are configured to lead to the refrigerator compartment cold airflow path  1147 , and the cold air flowing through the refrigerator compartment cold airflow path  1147  may be released to the refrigerator compartment via the refrigerator compartment cold air vents  1141 ,  1142 ,  1143 , and  1144 . 
         [0121]    The shelf holder receiving portion  1145  receives the shelf holder  1146  (see  FIG. 1 ). The shelf holder receiving portion  1145  may extend vertically. The shelf holder may be installed on the shelf holder receiving portion  1145 , and a plurality of shelves  1510  (see  FIG. 1 ) may be placed on the shelf holder, with height differences between them. 
         [0122]    The refrigerator compartment cold airflow path  1147  of  FIG. 5  is configured to surround the periphery of the refrigerator compartment fan  1160 . The perimeter of the refrigerator compartment fan  1160  refers to the circumference of the refrigerator compartment fan  1160 . The refrigerator compartment cold airflow path  1147  extends from the perimeter of the refrigerator compartment fan  1160  and connects to the refrigerator compartment cold air vents  1141 ,  1142 ,  1143 , and  1144 . The refrigerator compartment cold airflow path  1147  may be divided into two segments  1147   a  and  1147   b,  as shown in  FIG. 5 . 
         [0123]    The refrigerator compartment fan  1160  is installed on the back wall of the refrigerator compartment or behind the second cover  1150 . The refrigerator compartment fan  1160  blows air in a circumferential direction to supply the cold air generated by heat transfer across the evaporator  1800  to the refrigerator compartment cold air vents  1141 ,  1142 ,  1143 , and  1144 . The circumference of the refrigerator compartment fan  1160  is surrounded by the refrigerator compartment cold airflow path  1147 , so the cold air moved by the refrigerator compartment fan  1160  flows along the refrigerator compartment cold airflow path  1147 . 
         [0124]    The refrigerator compartment fan  1160  is a centrifugal fan that blows air in a circumference direction. The centrifugal fan refers to a type of fan that draws in cold air along the axis of rotation and releases it in the circumference direction. The axial direction of the refrigerator compartment fan  1160  of  FIG. 5  corresponds to the direction facing the front of the refrigerator compartment fan  1160 . 
         [0125]    The warm air generated by heat transfer with the food in the refrigerator compartment gets cold by heat transfer across the evaporator  1800 . The cold air is drawn in in the axial direction of the centrifugal fan, released in the circumferential direction, and supplied back to the refrigerator compartment sequentially via the refrigerator compartment cold airflow path  1147  and the refrigerator compartment cold air vents  1141 ,  1142 ,  1143 , and  1144 . 
         [0126]    The pantry fan  1900  is located outside the refrigerator compartment cold airflow path  1147  so as to supply cold air to the pantry  1530  through a cold airflow path, which is separate from the refrigerator compartment cold airflow path  1147 . That is, dual cold airflow paths are provided. One of the dual cold airflow paths is the refrigerator compartment cold airflow path  1147  to which cold air is supplied from the refrigerator compartment fan  1160 , and the other is the cold airflow path that supplies cold air directly to the pantry  1530  from the evaporator  1800  through the pantry fan  1900 . 
         [0127]    In some implementations, the cold airflow path for supplying cold air to the pantry  1530  is formed integral with the refrigerator compartment cold airflow path  1147  to supply cold air to the pantry  1530  from the refrigerator compartment fan  1160 . For example, the refrigerator compartment cold airflow path  1147  may include an additional segment that opens towards the pantry  1530 . Because the function of supplying cold air to the refrigerator compartment is determined by a combination of the refrigerator compartment fan  1160  and the refrigerator compartment cold airflow path  1147 , the additional segment may cause a loss of cold air flow. 
         [0128]    The pantry fan  1900  is an axial fan that blows air in an axial direction. The axial fan is a type of fan that has a plurality of blades along the circumference of a rotating body and draws in air from behind along the shaft and releases it to the front. It is preferable that the refrigerator compartment fan  1160  blows air in the circumferential direction since the refrigerator compartment cold air vents  1141 ,  1142 ,  1143 , and  1144  are far from the refrigerator compartment fan  1160 . On the contrary, it is preferable that the pantry fan blows air in the axial direction since the pantry fan  1900  is positioned to face the evaporator  1800  and the cold air vent  1630  of the duct structure  1600  is located close to the pantry fan  1900 . 
         [0129]    The evaporator  1800  include a plurality of rows that are formed by a stack of refrigerant pipes. Referring to  FIG. 5 , the evaporator  1800  may be formed in five rows, for example. The plurality of rows may include a first row  1810 , a second row  1820 , a third row  1830 , a fourth row  1840 , and a fifth row  1850 , from bottom to top, according to the order of stacking them. The plurality of rows may be divided into upper rows and lower rows according to height. For example, with respect to the boundary between the second row  1820  and the third row  1830 , the first row  1810  and the second row  1820  are classified as the lower rows, and the third to fifth rows  1830  to  1850  may be classified as the upper rows. 
         [0130]    The air intakes  1152   a  and  1152   b  formed in the second cover  1150  are formed at a height corresponding to the lower rows. Referring to  FIG. 5 , it can be seen that the air intakes  1152   a  and  1152   b  are formed at a height corresponding to the first row  1810 . On the contrary, the through hole  1155  of the second cover  1150 , the pantry fan  1900 , and the duct structure  1600  is formed at a height corresponding to the upper rows, with height differences between them. Referring to  FIG. 5 , it can be seen that the pantry fan  1900  is formed at a height corresponding to the third to fifth rows  1830  to  1850 . 
         [0131]    Since the through hole  1155  and the duct structure  1600  are spaced apart from the air intakes  1152   a  and  1152   b,  the air flowing into the evaporator  1800  via the air intakes  1152   a  and  1152   b  may transfer heat across the evaporator  1800  for a sufficient amount of time and may get cold enough. In some implementations, if the through hole  1155  and the duct structure  1600  are located close to the air intakes  1152   a  and  1152   b,  rather than being spaced apart from them, the air flowing into the air intakes  1152   a  and  1152   b  may flow back to the pantry without transferring heat across the evaporator  1800  for a sufficient amount of time. 
         [0132]      FIG. 6  illustrates an example second cover and an example duct structure. In  FIG. 6 , the rear of the second cover  1150  is illustrated when viewed from the position of the evaporator  1800  (see  FIG. 8 ). 
         [0133]    A boss portion  1154   b  is formed at the rear of the second cover  1150 . The boss portion  1154   b  is formed on the opposite side of the fastener insertion portion  1154   a  of  FIG. 4 . The boss portion  1154   b  is configured to surround a fastener that is inserted into the fastener insertion portion  1154   a.    
         [0134]    The refrigerator  1000  includes cover insulation  1170  installed at the rear of the second cover  1150 . The cover insulation  1170  has an opening  1171  corresponding to the through hole  1155 , and covers the rear of the second cover  1150  except the through hole  1155 . The base portion  1610  of the duct structure  1600 , the pantry fan  1900 , and duct insulation  1700  are exposed through the opening  1171 . 
         [0135]    The cover insulation  1170  includes a slot between two parts  1172  and  1173  of the cover insulation  1170  that are spaced apart from each other under the opening  1171 . The slot allows to flow any liquid, e.g., water, through a drainage passage  1174 . For example, the water condensed inside the duct structure  1600  may be drained through the drainage passage  1174  of the cover insulation  1170 . 
         [0136]    In some implementations, the refrigerator may include a drainage area to collect water drained from the drainage passage  1174 . In some other implementations, the drainage area can include a slope. The slope of the drainage area can drain water collected in the drainage area. 
         [0137]    The second cover  1150  may have a plurality of ridges  1156  protruding towards the through hole  1155  to support the duct structure  1600 . The ridges  1156  are spaced apart from one another, and  FIG. 6  illustrates that two ridges  1156  are formed at the top of the through hole  1155  and two ridges  1156  are formed at the bottom of the through hole  1155 . Preferably, the ridges  1156  are positioned further outward than the circumference of the pantry fan  1900  so that they do not block the air generated by the pantry fan  1900 . 
         [0138]    The air intakes  1152   a  and  1152   b  are formed at the bottom of the second cover  1150 . A plurality of air intakes  1152   a  and  1152   b  may be provided, and filters  11571  and  1157   b  may be installed at the exit of the air intakes  1152   a  and  1152   b  facing towards the evaporator  1800 . The filters  11571  and  1157   b  may be configured to prevent impurities from entering the evaporator via the air intakes  1152   a  and  1152   b  or to remove smells. 
         [0139]    As explained above, the duct structure  1600  includes attaching projections  1671  and  1672  and a fastener insertion portion  1673 . Thus, the duct structure  1600  may be attached to the front of the second cover  1150 . However, the duct structure  1600  may fall out onto the evaporator  1800  through the through hole  1155  in the second cover  1150 . The ridges  1156  may support the base portion  1610  of the duct structure  1600 , and the ridges  1156  may prevent the duct structure  1600  from being arbitrarily removed from the second cover  1150 . 
         [0140]    The duct insulation  1700  is located between the pantry fan  1900  and the duct structure  1600 . The duct insulation  1700  is configured to surround the edge of the pantry fan  1900 , and the edge of the duct insulation  1700  is surrounded by the duct structure  1600 . The duct insulation  1700  may fix the pantry fan  1900  in place since it surrounds the pantry fan  1900 . 
         [0141]    In some implementations, the duct insulation  1700  is optional and that the pantry fan  1900  may be attached directly to the inside of the duct structure  1600  without the duct insulation  1700 . 
         [0142]    In some implementations, the duct insulation  1700  can have a hole  1730  (see  FIG. 8 ) corresponding to the cold air vent  1630  of the duct structure  1600  in order to not block the flow of cold air generated by the pantry fan  1900 . 
         [0143]    The duct insulation  1700  is configured to block most of the back of the duct structure  1600 , but does not block the wire receiving portion  1650  in order to place a wire in it. Also, the duct insulation  1700  may include a slot between two parts  1711  and  1712  of the duct insulation  1700  that are spaced apart from each other. The slot is located between the lower end of the pantry fan  1900  and the base of the duct structure  1600 . The slot allows any liquid, e.g., water, to flow through a drainage passage  1713 . 
         [0144]    The base of the duct structure  1600  has a drainage area  1680  that is partially set lower than other areas to collect water in it. The drainage area  1680  slopes towards the through hole  1155  to drain collected water. The drainage passage  1713  of the duct insulation  1700 , the drainage area  1680  of the duct structure  1600 , and the drainage passage  1174  of the cover insulation  1170  are sequentially positioned to form one drainage passage. 
         [0145]      FIG. 7  illustrates an example interior of a refrigerator compartment. For example, the example interior of a refrigerator compartment in  FIG. 7  can be a cross-sectional view taken along the line B-B of the refrigerator compartment  1210  of  FIG. 1  when viewed from one side.  FIG. 8  illustrates an example refrigerator compartment. For example, the refrigerator compartment (portion C) of  FIG. 7  can be the example refrigerator compartment in  FIG. 8 . 
         [0146]    The insulation  1130  fills in the space between the outer casing  1110  and the inner casing  1120 . The door is configured to open or close the front openings of the main refrigerator body  1100 . A configuration in which the door liner  1311   a  and the gasket  1311   b  are provided on the door  1311 , a configuration in which the basket  1540  is attached to the door  1311 , and a configuration in which the shelf  1510  is installed to the refrigerator compartment  1210  have been described with reference to  FIG. 1 . Also, a configuration in which the first cover  1140  and the second cover  1150  are installed to the back wall of the refrigerator compartment  1210  has been described above with reference to  FIG. 2 . 
         [0147]    The pantry  1530  is located at the base of the refrigerator compartment  1210 , and the drawer  1520  is installed above the pantry  1530 . The partition  1550  is installed between the pantry  1530  and the drawer  1520 , and the partition  1550  forms a boundary between the drawer  1520  and the pantry  1530 . When the pantry  1530  is closed, the partition  1550  comes into close contact with the front portion of the pantry  1530 . The front portion of the pantry  1530  refers to the portion where the handle  1535  of the pantry  1530  is formed. A handle  1520   e  of the drawer  1520  and the handle  1535  of the pantry  1530  are installed in the direction facing the door. 
         [0148]    The second cover  1150  is installed behind the drawer  1520  and the pantry  1530 . The air intake  1152   a  and  1152   b  are formed below the second cover  1150 . The perimeter of the air intakes  1152   a  and  1152   b  may protrude towards the bottom of the pantry  1530 . The duct structure  1600  is set higher than the air intakes  1152   a  and  1152   b,  with a height difference with the air intakes  1152   a  and  1152   b.    
         [0149]    The duct insulation  1700  has a front portion  1620  facing the front of the pantry fan  1900 . At least part of the front portion  1620  may slope or curve down from the pantry fan  1900 . 
         [0150]    At least part of the front portion  1620  may slope or curve down from the pantry fan  1900 . It can be said that, since the hole  1730  corresponding to the cold air vent  1630  is formed under the front portion  1620 , at least part of the front portion  1620  slopes or curves down towards the hole  1730  from the pantry fan  1900 . 
         [0151]    The sloping angle or curvature of the front portion  1620  may not be constant. For example, referring to  FIG. 8 , it can be seen that the sloping angle of the front portion  1620  changes at a certain point and the front portion  1620  slopes more steeply down this point. An inflection point may also exist in a case where the front portion  1620  slopes. 
         [0152]    As explained above, the duct structure  1600  slopes or curves. The duct insulation  1700  also slopes or curves for the same reason as the duct structure  1600 . In a refrigerator without the duct insulation  1700 , the duct insulation  1700  is optional, so it is necessary for the front portion  1620  of the duct structure  1600  to slope or curve  1700 . In some implementations, in a refrigerator with the duct insulation  1700 , it is not always necessary for the duct structure  1600  to slope or curve, but only the duct insulation  1700  may slope or curve. 
         [0153]    The back wall  1521   b ′ of the drawer  1520  may slope or curve, corresponding to the front portion  1620  of the duct structure  1600 , and is spaced apart from the duct structure  1600 . Similarly, the back wall  1531  of the pantry  1530  is spaced apart from the air intakes  1152   a  and  1152   b.    
         [0154]    The evaporator  1800  include a plurality of rows that are formed by a stack of refrigerant pipes  1801 . A fin  1802  is attached to each refrigerant pipe to increase the heat transfer area. The air intakes  1152   a  and  1152   b  are placed corresponding to the lower row  1810 , and the duct structure  1600  and the pantry fan  1900  are placed corresponding to the upper rows  1830 ,  1840 , and  1850 . The evaporator  1800  is connected to a number of refrigerant pipes  1803 ,  1804 , and  1805 . 
         [0155]    The duct structure  1600  protrudes to the space between the pantry  1530  and the partition  1550 . Thus, the air cooled across the evaporator  1800  may be supplied directly to the pantry  1530  via the cold air vent  1630 , and the internal temperature of the pantry  1530  may be kept lower than the average temperature of the refrigerator compartment  1210 . 
         [0156]    The refrigerator compartment fan  1160  may be installed higher than the evaporator  1800 . Cold air is supplied to the refrigerator compartment  1210  by the refrigerator compartment fan  1160 . The refrigerant compartment cold airflow path  1147  (see  FIG. 5 ) and the cold airflow path for supplying cold air to the pantry  1530  are in a dual configuration. The cold airflow path for supplying cold air to the pantry  1530  refers to a path formed by the duct structure  1600 . 
         [0157]      FIG. 9  illustrates an example duct structure. The components of the duct structure  2600  of  FIG. 9  are identical to those of the duct structure  1600  of  FIGS. 3 to 6 , except that the duct structure  2600  includes a blocking portion  2633 . The duct structure  2600  includes a base portion  2610 , a front portion  2620 , an cold air vent  2630 , a temperature sensor receiving portion  2640 , a cold air inlet/outlet  2641 , a wire receiving portion  2650 , a wire receiving groove  2660 , attaching portions  2671  and  2672 , a fastener insertion portion  2673 , and a drainage area. A description of these components will be substituted with the description of  FIGS. 3 to 6 . 
         [0158]    The blocking portion  2633  is configured to block at least part of the cold air vent  2630 . A part of the cold air vent  2630  blocked by the blocking portion  2633  corresponds to either one of the left perimeter  2631  and right perimeter  2632  of the cold air vent  2630  that protrudes further than the other. For example, the left perimeter  2631  and the right perimeter  2632  are formed around the cold air vent  2630  shown in  FIG. 9 , and the left perimeter  2631  protrudes further than the right perimeter  2632 . Accordingly, the cold air vent  2630  opens in an oblique direction. 
         [0159]    The part of the cold air vent  2630  corresponding to either one of the left perimeter  2631  and right perimeter  2632  that protrudes further than the other may be partially blocked by the blocking portion  2633 . For example, referring to  FIG. 9 , the blocking portion  2633  may be configured to block a part of the cold air vent  2630  corresponding to the left perimeter  2631 . 
         [0160]    The blocking portion  2633  is formed in order to release cold air towards the center of the pantry  2530  from the duct structure  2600  that is placed off-center to one side of the center of the pantry  2530 . Since the left side of the cold air vent  2630  is blocked by the blocking portion  2633 , cold air may be released through the center or right side of the cold air vent  2630 , and it is expected that cold air will be naturally released towards the center of the pantry  2530 . 
         [0161]    In some implementations, the descriptions described above with reference to the refrigerator compartment  1210  (see  FIG. 1 ) can be applied to the freezer compartment  1220  (see  FIG. 1 ). In this example, the components of the freezer compartment may be named a freezing compartment cold airflow path, a freezing compartment fan, and freezing compartment cold air vents, corresponding to the refrigerator compartment cold airflow path, refrigerator compartment fan, refrigerator compartment cold air vents. Also, the term “food storage compartment airflow path” may encompass the refrigerator compartment airflow path and the freezer compartment airflow path, the term “food storage compartment fan” may encompass the refrigerator compartment fan and the freezer compartment fan, and the term “food storage compartment cold air vents may encompass the refrigerator compartment cold air vents and the freezer compartment cold air vents.