JP2014105935A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator capable of suppressing leakage of a lot of cold air from a storage compartment having a structure that a plurality of stages of storage containers are drawn out by drawers of drawer doors.SOLUTION: In drawer type storage containers, a storage volume of a middle-stage storage container between an upper-stage storage container and a lower-stage storage container, is maximized, and a storage volume of at least the lower-stage storage container is reduced with respect to that of the middle-stage storage container. As the storage volume of the lower-stage storage container drawn out most, is small when the drawer door is drawn out, an amount of cold air leaking externally can be reduced, as a result, electric power of a driving motor of a compressor for making up the leakage of cold air can be reduced, and energy-saving performance can be improved.

Description

  The present invention relates to a refrigerator that stores food, drinking water, and the like by refrigeration or freezing, and particularly relates to a refrigerator that includes a storage chamber in which a plurality of storage containers are stacked.

  Some recent refrigerators have a refrigerator compartment at the top inside the box constituting the refrigerator, a freezer compartment at the middle, and a vegetable compartment at the bottom. The freezer compartment is divided into an upper freezer compartment and a lower freezer compartment. The upper freezer compartment is provided with an ice making compartment and an upper small freezer compartment, which are divided into left and right, and the lower freezer compartment has various sizes of food. Therefore, a storage container with a large storage volume and a storage container with a small storage volume are provided. At least the doors of the lower freezer compartment and the vegetable compartment are drawer type doors, and the storage container is pulled out together with the drawer of the door.

  For example, in the refrigerator described in Japanese Patent Application Laid-Open No. 2007-71497 (Patent Document 1), the storage containers of the freezer compartment are provided in three stages, and the height of the storage container is shallower in order from the upper stage, and the lowermost storage container is provided. It is deepest and has the largest storage volume. In this way, the storage containers of different sizes are used to store frozen foods of various sizes, with the top storage container storing small foods and thins, and the middle storage container Airtight containers and freezing bags containing ingredients are stored, and large frozen foods are stored in the lowermost storage room.

  And in the structure which has arrange | positioned the freezer compartment in the intermediate part of the refrigerator, the cooler for cooling the air in a store | warehouse | chamber is installed in the back part of the freezer compartment. An air blower for circulating cold air cooled by the cooler to the entire interior of the cooler is provided at the upper part of the cooler, and cools the stored items by blowing cold air into the refrigerator compartment, vegetable compartment, and freezer compartment.

  In freezing rooms, the ice making room, the upper small freezing room, and the lower freezing room are often connected spatially in their respective storage rooms. It is installed above the chamber, and smooth ventilation to the ice making chamber and the upper small freezer compartment prevents the upper temperature from rising and allows the entire freezer compartment to be cooled uniformly. Further, the cold air blown out from the blower passes through a space between the cooler storage chamber and the partition member partitioning the storage chamber, and each storage container is supplied from the cold air outlet to each storage container provided in the partition member. It is configured to blow air inside.

JP 2007-71497 A

  By the way, in the refrigerator described in Patent Document 1 described above, an upper refrigerated storage container, a middle refrigerated storage container, and a lower refrigerated storage container are arranged in this order on the drawer frame of the freezer compartment door, and the storage volume thereof is lower. The frozen storage container is configured to be the largest. When the freezer compartment door is pulled out, the amount of drawers for the upper refrigerated storage container, middle refrigerated storage container, and lower refrigerated storage container is in the order of lower refrigerated storage container, middle refrigerated storage container, and upper refrigerated storage container. As seen from above, the bottom refrigerated storage room is pulled out most.

  Therefore, when taking out the stored food in the upper frozen storage room or the middle frozen storage room, after pulling out the freezer compartment door, the upper frozen storage room or the middle frozen storage room is further pulled out to take out the stored food. It will be. For this reason, when the stored food of any one of the lower frozen storage container, the middle frozen storage container, and the upper frozen storage container is taken out, the lower frozen storage container is surely exposed to the outside air. Thus, if the volume of the lower frozen storage container is formed large, cold air leaks to the outside by this amount, and instead it is replaced with the warm external air. When the freezer compartment door is closed, the temperature sensor installed therein detects that the temperature of the freezer compartment has risen, and the compressor provided in the refrigerator is driven to replenish cold air.

  For this reason, it is necessary to give extra electric power to the electric motor that drives the compressor, which is not preferable from the viewpoint of energy saving. Although the above description is for the freezer compartment, the same applies to other storage chambers in which a drawer door is similarly used and a plurality of storage containers are pulled out together with the drawer door drawer.

  The objective of this invention is providing the refrigerator which can suppress that a lot of cool air leaks from the storage chamber of the structure where a multistage storage container is pulled out by drawer | drawing-out of a drawer door.

  A feature of the present invention is that the storage volume of the middle storage container between the upper storage container and the lower storage container is maximized in the drawer-type storage container, and at least the storage capacity of the lower storage container is reduced. is there.

  According to the present invention, when the drawer door is pulled out, since the storage volume of the lower storage container that is pulled out most is small, the amount of cold air that leaks to the outside decreases, and as a result, the compressor that replenishes the leaked cold air Since the power of the drive motor can be reduced, energy saving can be achieved.

It is a front external view of the refrigerator which becomes one embodiment of this invention. It is sectional drawing which shows the XX cross section of the refrigerator shown in FIG. It is a front view which shows the structure inside the back surface in the store | warehouse | chamber of the refrigerator shown in FIG. It is a perspective view of the middle stage storage container of the freezer compartment shown in FIG. It is a perspective view of the lower storage container of the freezer compartment shown in FIG. It is explanatory drawing which looked at the flow of the cold air of the freezer compartment of the refrigerator shown in FIG. 2 from the front. It is explanatory drawing which looked at the flow of the cold air of the freezer compartment of the refrigerator shown in FIG. 2 from the side.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments, and various modifications and application examples are included in the technical concept of the present invention. Is also included in the range.

  FIG. 1 is a front external view of a refrigerator according to one embodiment of the present invention, and FIG. 2 is a cross-sectional view showing the XX cross section of FIG. Therefore, the cross section of the ice making chamber is not shown in the figure.

  1 and 2, the refrigerator body 1 includes a refrigerator compartment 2, an ice making compartment 3, an upper freezer compartment 4, a lower freezer compartment 5, and a vegetable compartment 6 from above. The ice making chamber 3 and the upper freezer compartment 4 are provided side by side between the refrigerator compartment 2 and the lower freezer compartment 5. As an example, the refrigerator compartment 2 and the vegetable compartment 6 are storage rooms in a refrigerator temperature zone of approximately + 3 ° C. to + 5 ° C. Further, the ice making room 3, the upper freezing room 4, and the lower freezing room 5 are storage rooms in a freezing temperature zone of approximately −18 ° C.

  The refrigerating room 2 is provided with a folding door (so-called French type) refrigerating room doors 2a and 2b divided into left and right sides on the front side. The ice making room 3, the upper freezing room 4, the lower freezing room 5, and the vegetable room 6 are each provided with a drawer type ice making room door 3a, an upper freezing room door 4a, a lower freezing room door 5a, and a vegetable room door 6a.

  In addition, a packing (not shown) with magnets built in along the outer edge of each door is provided on the surface of each door on the storage room side, and when each door is closed, the outside of the refrigerator formed of an iron plate is provided. Close contact with the box flange and each partitioning iron plate described later suppresses intrusion of outside air into the storage chamber and leakage of cold air from the storage chamber.

  Here, a machine room 19 is formed in the lower part of the refrigerator, and a compressor 24 is built therein. The cooler storage chamber 8 and the machine chamber 19 are communicated with each other by a drain passage 27 so that condensed water can be discharged.

As shown in FIG. 2, the outside of the refrigerator body 1 and the inside of the refrigerator are separated by a heat insulating box 10 formed by filling a foaming heat insulating material (foamed polyurethane) between the inner box 1a and the outer box 1b. It has been. Moreover, the heat insulation box 10 of the refrigerator body 1 has a plurality of vacuum heat insulating materials 25 mounted thereon.
In the refrigerator main body 1, the refrigerator compartment 2, the upper freezer compartment 4 and the ice making room 3 (see FIG. 1, the ice making room 3 is not shown in FIG. 2) are adiabatically separated by the upper heat insulating partition wall 51. The lower freezer compartment 5 and the vegetable compartment 6 are separated from each other by the lower heat insulating partition wall 52.

  In addition, a horizontal partition is provided in the upper part of the lower freezer compartment 5. The horizontal partitioning part partitions the ice making room 3 and the upper freezing room 4 and the lower freezing room 5 in the vertical direction. Moreover, the vertical partition part which partitions off between the ice-making room 3 and the upper freezer compartment 4 in the left-right direction is provided in the upper part of the horizontal partition part.

  The horizontal partitioning part, together with the front surface of the lower heat insulating partition wall 52 and the front surfaces of the left and right side walls, is in contact with packing (not shown) provided on the storage room side surface of the lower freezing room door 5a, and the ice making room door 3a and the upper freezing room. Packing (not shown) provided on the surface of the door 4a on the storage room side is in contact with the front and left side walls of the horizontal partition, vertical partition, upper heat insulating partition wall 51 and refrigerator body 1, and The movement of the cold air between the doors is suppressed.

  Since the ice making chamber 3, the upper freezing chamber 4 and the lower freezing chamber 5 are all in the freezing temperature zone, the horizontal partition and the vertical partition should be at least on the front side of the refrigerator main body 1 in order to receive the packing of each door. (See FIG. 2). That is, there may be a movement of cold air between the storage rooms in the freezing temperature zone, or a case where the heat insulation section is not performed.

  On the other hand, when the upper freezer compartment 4 is a temperature compartment, it is necessary to insulate it, so that the horizontal partition and the vertical partition extend from the front side of the refrigerator body 1 to the rear wall. In the present embodiment, the ice making chamber 3, the upper freezing chamber 4, and the lower freezing chamber 5 are not insulatively partitioned but are in spatial communication with each other in these storage chambers.

  A plurality of door pockets 32 are provided in the storage compartments of the refrigerator compartment doors 2a and 2b (see FIG. 2). The refrigerator compartment 2 is provided with a plurality of shelves 36. By the shelf 36, the refrigerator compartment 2 is partitioned into a plurality of storage spaces in the vertical direction.

  As shown in FIG. 2, the upper freezer compartment 4, the lower freezer compartment 5, and the vegetable compartment 6 have doors 4a, 5a, 6a provided in front of the respective storage compartments, an upper frozen storage vessel 4b, and an upper frozen storage vessel. 61, a middle frozen storage container 62, a lower frozen storage container 63, and a vegetable storage container 6b are provided.

  The ice making room door 3a, the upper freezing room door 4a, the lower freezing room door 5a, and the vegetable room door 6a are respectively drawn into the freezing storage container 4b and the lower stage freezing storage by putting a hand on a handle portion (not shown) and pulling it out to the front side. The container 63 and the vegetable storage container 6b can be pulled out.

  Here, the relationship between the volumes of the storage containers provided in the lower freezer compartment 5 is determined as follows. That is, the middle-stage frozen storage container 62 has the largest volume, followed by the lower-stage frozen storage container 63 and the upper-stage frozen storage container 61 in this order. As described above, when the lower frozen storage container 63 is made the largest as in the prior art, there is a problem that a large amount of cold air flows to the outside when the drawer door 5a is pulled out, whereas the lower frozen storage container as in this embodiment. If 63 is made small, the amount of cold air leaking to the outside air can be reduced.

  In order to reduce the leakage of cold air from the lower refrigerated storage container 63 to the outside air, the volume may be changed between the upper refrigerated storage container 61 and the middle refrigerated storage container 62. Then, the storage volume of the upper stage frozen storage container 61 is made the smallest. The reason is as follows. In general, in a refrigerator having a freezer compartment in the center of the refrigerator, the lower freezer compartment 5 is spatially connected to the ice making room 3 and the upper freezer compartment 4 at the upper part thereof without any partition. Therefore, the cold air blown into the upper freezer storage container 61 of the lower freezer compartment 5 goes out of the upper freezer storage container 61 and flows into the ice making room 3 and the upper freezer room 4. 3 and the cold air leak (inflow of heat) from the side wall of the upper stage freezer compartment 4 and the gap of the door are promoted. Therefore, the amount of cold air to the upper frozen storage container 61 should be small, and the size of the container should not be so large. On the other hand, if the middle-stage refrigerated storage container 62 is enlarged as in this embodiment, even if the amount of cold air is increased, the upper-stage refrigerated storage container 61 is present on the upper refrigerated storage container 61. Cold air does not go and it becomes possible to reduce cold air leakage.

  Further, in this embodiment, the lower freezing storage container 63 of the lower freezing room 5 is suspended on a drawer frame 5d provided on the lower freezing room door 5a, and when the lower freezing room door 5a is pulled out, this lower freezing storage container Only 63 is pulled out.

  When the upper refrigerated storage container 61 and the middle refrigerated storage container 62 are stored in the lower freezer compartment 5, the upper flange portions of the upper refrigerated storage container 61 and the middle refrigerated storage container 62 are fixed to the inner box 1a of the refrigerator (not shown). And when pulling out, the user slides and moves each of the frozen storage containers 61 and 62 forward using this rail, and then is placed on the upper flange of the lower frozen storage container 63. It is configured as follows. Accordingly, the upper and lower frozen storage containers 61 and 62 can be easily put in and out of food by setting the drawing amount close to the drawing amount of the lower frozen storage container 63.

  In addition, when the storage capacity of the middle-stage frozen storage container 62 is large and the weight increases and the resistance when the middle-stage frozen storage container 62 is pulled out, a slide rail with rollers and bearings is attached to the inner box 1a of the refrigerator for the middle-stage frozen storage container 62. Further, the middle-stage frozen storage container 62 may be supported and pulled out.

  With such a structure, when pulling out the lower freezer compartment door 5a of the lower freezer compartment 5, at least the middle freezer storage container 62 having the largest storage volume is left in the lower freezer compartment 5, and compared with the middle freezer compartment 62. Since only the lower refrigerated storage container 63 with a small storage volume is drawn out, only the outflow of cold air from the lower refrigerated storage container 63 and the inflow of heat from the outside air that replaces it when the door is opened and closed will increase the temperature of the freezer compartment. It can be suppressed as much as possible.

  Therefore, when the lower freezer compartment door 5a is closed after the food is taken out from the lower frozen storage container 63, it is detected that the temperature of the freezer compartment has risen by the temperature sensor installed therein, and the compressor provided in the refrigerator Drives to replenish cold air. However, according to the present embodiment, when the lower freezer compartment door 5a is pulled out, the storage volume of the lower storage container that is pulled out most is small, so that the amount of cool air that leaks to the outside decreases, and as a result, the leaked cool air Since the electric power of the drive motor of the compressor for replenishing can be reduced, energy saving can be achieved.

  Here, in this embodiment, the lower refrigeration storage container 63 of the lower freezer compartment 5 is suspended on a drawer frame 5d provided on the lower freezer compartment door 5a. When the lower freezer compartment door 5a is pulled out, this lower refrigeration storage container 63 is suspended. Only the container 63 is pulled out.

  On the other hand, when the lower freezer compartment door 5a is pulled out, the upper refrigerated storage container 61 and the middle refrigerated storage container 62 may be pulled out partway. Of course, it is configured so that the upper stage frozen storage container 61 and the middle stage frozen storage container 62 can be pulled out from this state and pushed back to the back side in the cabinet.

  This configuration includes engaging portions that engage between the upper part of the lower frozen storage container 63 and the lower part of the middle frozen storage container 62 and the upper part of the middle frozen storage container 62 and the lower part of the upper frozen storage container 61. When the lower frozen storage container 63 is pulled out, the upper frozen storage container 61 and the middle frozen storage container 62 can be pulled out partway through this engaging portion. When pulling out the upper-stage frozen storage container 61 and the middle-stage frozen storage container 62 toward the front, or when pushing back to the inner side of the warehouse, the user releases this engagement state (specifically, it is released with a force that can be removed by hand) If it can be engaged, the upper flange portions of the upper frozen storage container 61 and the middle frozen storage container 62 can be slid and moved along the rail fixed to the inner box 1a of the refrigerator. According to this, since at least the middle-sized refrigerated storage container 62 having a large volume is exposed to the outside air only halfway, it is possible to reduce the leakage of cold air as compared with the configuration in which the entire surface is exposed to the outside as in the prior art. is there.

  2 and 3, the refrigerator main body 1 includes a cooler 7 as a cooling means. The cooler 7 (for example, a fin tube heat exchanger) is provided in a cooler storage chamber 8 provided at the back of the lower freezing chamber 5. A blower 9 (propeller fan as an example) is provided as a blowing means in the cooler storage chamber 8 and above the cooler 7.

  The air cooled by the heat exchange with the cooler 7 (hereinafter, the low-temperature air heat-exchanged by the cooler 7 is referred to as “cold air”) is sent by the blower 9 to the refrigerator compartment air duct 11, the freezer compartment air duct 12, and It is sent to each storage room of the refrigeration room 2, the ice making room 3, the upper freezing room 4, the lower freezing room 5, and the vegetable room 6 through an ice making room air duct (not shown).

  The air to each storage room is sent to the first air blowing control means (hereinafter referred to as the cold room damper 20) for controlling the amount of air sent to the cold room 2 in the refrigeration temperature zone, and to the freezing rooms 4 and 5 in the freezing temperature zone. It is controlled by a second air flow control means (hereinafter referred to as a freezer damper 50) that controls the air flow. Incidentally, the air ducts to the refrigerator compartment 2, the ice making room 3, the upper freezer room 4, the lower freezer room 5, and the vegetable room 6 are arranged on the back side of each storage room of the refrigerator body 1 as shown by broken lines in FIG. Is provided. Specifically, when the refrigerator compartment damper 20 is in the open state and the freezer compartment damper 50 is in the closed state, the cold air is sent to the refrigerator compartment 2 from the outlets 2 c provided in multiple stages via the refrigerator compartment air duct 11.

  The cold air that has cooled the refrigerator compartment 2 is provided on the lower right rear side of the lower heat insulating partition wall 52 from the refrigerator compartment return port 2d provided in the lower portion of the refrigerator compartment 2 through the refrigerator compartment-vegetable compartment communication duct 16. The air is sent to the vegetable compartment 6 from the vegetable compartment outlet 6c. The return cold air from the vegetable compartment 6 passes from the vegetable compartment return duct inlet 18a provided in front of the lower part of the lower heat insulating partition wall 52 through the vegetable compartment return duct 18 and from the vegetable compartment return duct outlet 18b to the cooler storage compartment 8. Return to the bottom. As another configuration, the refrigeration room-vegetable room communication duct 16 may be returned to the lower right side as viewed from the upper surface of the cooler storage room 8 in FIG. As an example in this case, a vegetable room air duct is arranged at the front projection position of the refrigerator compartment-vegetable room communication duct 16, and the cold air heat-exchanged by the cooler 7 is directly blown from the vegetable room outlet 6 c to the vegetable room 6. To come.

  As shown in FIG. 2, a partition member 13 that partitions each storage chamber and the cooler storage chamber 8 is provided in front of the cooler storage chamber 8. As shown in FIG. 3, outlets 3 c, 4 c, 64, 65 are formed in the partition member 13, and when the freezer damper 50 is in an open state, the cool air exchanged by the cooler 7 is blown by the blower 9. The air is blown from the outlets 3c and 4c to the ice making chamber 3 and the upper freezing chamber 4 through an ice making chamber air duct and an upper freezer room air duct which are not shown. Further, the air is blown from the outlets 64 and 65 to the lower freezer compartment 5 through the lower freezer compartment air duct 12.

  In general, for the purpose of increasing the storage volume of the lower freezer compartment 5, the depth dimensions of the middle-stage frozen storage container 62 and the lower-stage frozen storage container 63 are expanded as far as possible. For this reason, the partition member 13 approaches the back of the refrigerator, and the lower freezer compartment air duct 12 that is a space between the partition member 13 and the cooler storage chamber 8 tends to be narrow.

  That is, for the purpose of increasing the storage capacity of the lower freezer compartment 5 as described above, when the depth dimension of each storage container 62, 63 is expanded as far as possible in the interior, the back part of the storage container is connected to the partition member 13. Since it approaches, the partition member 13 must be retreated, and as a result, the space between the partition member and the cooler storage chamber 8 is often narrowed. For this reason, when the storage container with the largest storage volume is installed in the lowermost stage as in Patent Document 1, a lot of cold air to the lower-stage frozen storage container with the largest storage volume in the lowermost stage is the narrow and long air duct. Therefore, there is a problem that the ventilation resistance is increased, the power of the blower 9 is required more, and the power consumption is increased.

  On the other hand, in the present embodiment, the storage container having a large storage volume and requiring a large amount of cold air is not the lowermost stage but the middle stage frozen storage container 62, so the distance from the blower 9 to the outlets 64 and 65 is shortened. Thus, it is possible to expect the effect that the ventilation resistance of the cold air can be reduced and the electric power of the blower 9 can be reduced.

  In addition, since the low-temperature cold air forms a downward air flow from the upper side to the lower side, in the structure in which the ice making chamber 3 and the upper freezing chamber 4 communicate with the lower freezing chamber 5 as in the present embodiment, The blower 9 and the freezer compartment damper 50 are installed above the lower freezer compartment 5 so as to smoothly blow cool air to the upper ice making compartment 3 and the upper freezer compartment 4 in order to suppress the temperature rise and cool the entire storage compartment uniformly. Has been.

  Therefore, the cold air blown out to the upper frozen storage container 4b, the upper frozen storage container 61, and the middle frozen storage container 62 cools the stored items in the respective storage containers 4b, 61, 62, and then the respective storage containers. 4b, 61, 62 flows out from the front upper part, flows downward through the front of each storage container 4b, 61, 62 and the upper freezer compartment door 4a and the lower freezer compartment door 5a, and then stores in the lower stage lower stage frozen storage It passes between the bottom surface of the container 63 and the bottom surface of the lower freezing chamber 5 and returns to the cooler housing chamber 8 from the cooler housing chamber return opening 17.

  Therefore, the cold air passing through the front surfaces of the respective storage containers 4b, 61, 62 promotes heat exchange with the upper freezer compartment door 4a and the lower freezer compartment door 5a, and increases heat inflow from the outside. Further, the cold air passing through the bottom of the freezer compartment has a problem in that heat exchange with the vegetable compartment 6 in the refrigerated temperature zone is promoted to increase heat inflow from the vegetable compartment 6 to the lower freezer compartment 5.

  In order to solve this problem, for example, the cool air may be returned to the cooler storage chamber 8 without flowing out of the storage container. For this purpose, it is conceivable to arrange a cold air return opening to the cooler storage chamber 8 on the back surface of the lowermost lower refrigerated storage container 63. However, since there is a cold air inflow opening from the cooler 7 for cooling the stored item in the rear part of the same lower-stage lower frozen storage container 63, cold air is formed at the back of the lower-stage lower frozen storage container 63. In the case of the lower frozen storage container 63 having the largest storage volume as disclosed in Patent Document 1, cold air does not reach near the front of the lower frozen storage container 63, and the entire lower frozen storage container 63 is cooled. There was a problem that could not be spread.

  In order to solve such a problem, the present embodiment proposes a storage container described below.

  As shown in FIG. 4, the cool air blown from the cooler 8 flows into the middle-stage frozen storage container 62 and flows into the middle-stage frozen storage container 62 to cool the stored material, and then flows out to the lower-stage frozen storage container 63. The door side cold air slit 62a and the side surface side cold air slit 62b are opened. The cold air slits 62a and 62b are formed at the bottom corners on the door side and the side surface side of the middle-stage frozen storage container 62, respectively.

  That is, the middle-stage refrigerated storage container 62 includes a rectangular bottom wall surface portion 62c, a rear side wall surface portion 62d, a door side wall surface portion 62e, and a side wall surface surface portion 62f that connect them. The door side cold air slit 62a is formed across the connection corner of the door side wall surface portion 62e and the bottom wall surface portion 62c, and the side surface cold air slit 62a is formed across the connection corner of the side wall surface surface portion 62f and the bottom wall surface portion 62c. Yes. Thus, the door-side cold air slit 62a extends from the lower side wall surface portion 62e of the door side wall surface portion 62e to the bottom wall surface portion 62c, and from the side wall surface surface portion 62f in front of the half side of the depth dimension of the side surface side cold air slit 62b. It is open to 62c. Although not illustrated in the drawings, the upper refrigerated storage container 61 has substantially the same configuration, and a door side cold air slit 61a and a side side cold air slit 61b are formed as shown in FIGS. Has been. In addition, the difference in the fine structure of the upper stage frozen storage container 61 and the middle stage frozen storage container 62 is demonstrated later.

  The lower refrigerated storage container 63 tends to collect cold air having a low temperature due to natural convection of the cold air. In this embodiment, the storage capacity of the lower refrigerated storage container 63 is smaller than the storage capacity of the intermediate refrigerated storage container 62. Even if a cold air outlet for cooling the lower refrigerated storage container 63 is provided and the chilled air from the cooler is not introduced, the stored item is stored by the cold air flowing from the middle refrigerated storage container 62 through the cold air slits 62a and 62b. It is possible to cool.

  The lower refrigerated storage container 63 is provided with a return cold air slit 63a on the back side for allowing the cold air flowing in from the middle refrigerated storage container 62 to flow out to the cooler storage chamber return opening 17 formed in the partition member 13. The back side cold air slit 63 a is formed at the bottom corner of the back side of the lower frozen storage container 63. That is, the lower refrigerated storage container 63 includes a rectangular bottom wall surface portion 63b, a door side wall surface portion 63c, a rear side wall surface portion 63d, and a side wall surface surface portion 63e that connect them. The back side cold air slit 63a is formed across the connecting corner of the back side wall surface part 63d and the bottom wall surface part 63b.

  As shown in FIGS. 4 and 5, the connecting corners of the bottom wall surfaces of the storage containers 61, 62, 63 are formed in a curved shape, and the cold air slits 62a, 62b, 63a are formed in the curved portions. By opening, the cold air slits 62a, 62b, 63a are not easily blocked by the stored items.

  Next, the flow of cold air when the upper frozen storage container 61, the middle frozen storage container 62, and the lower frozen storage container 63 described above are combined will be described. 6 shows a drawing in which each storage container 61, 62, 63 is cut in a plane perpendicular to the depth direction, and FIG. 7 shows a drawing in which each storage container 61, 62, 63 is cut in a plane parallel to the depth direction. Yes.

  As shown in FIGS. 6 and 7, a lower rib 61 d is formed near the bottom of the side wall surface 61 c of the upper frozen storage container 61, and the lower rib 61 d is an upper surface of the side wall surface 62 f of the middle frozen storage container 62. The upper rib 62g formed in the vicinity is slidably engaged. In addition, a lower rib 62h is formed near the bottom of the side wall surface portion 62f of the middle frozen storage container 62, and the lower rib 62h is formed with an upper rib 63f formed near the upper surface of the side wall surface portion 63e of the lower frozen storage container 63. It is slidably engaged.

  The cold air flowing in from the outlet 64 flows out of the cold air slits 61a and 61b of the upper frozen storage container 61 and reaches the middle frozen storage container 62. The intermediate frozen storage container 62 is further added with the cold air from the outlet 65. The cold air flows out from the cold air slits 62 a and 62 b of the middle-stage frozen storage container 62 and reaches the lower-stage frozen storage container 63. The cold air flowing into the lower frozen storage container 63 cools the stored items in the lower frozen storage container 63 from the front, and then flows out and cools by a return cold air slit 63a provided at the back of the lower frozen container 63 as shown in FIG. It returns to the cooler housing chamber 8 from the cooler housing chamber return opening 17. The return cold air slit 63a is also opened from the back side wall surface portion 63d of the lower frozen storage container 63 to the curved shape portion of the bottom wall surface portion 63b connecting corner portion, and the return cold air slit 63a is not easily blocked by the stored item.

  In addition, a lower rib 62h extends in the depth direction outside the cold air slit 62b of the side wall surface portion 62f on both side surfaces of the middle-stage frozen storage container 62, and the lower rib 62h is an upper portion of the side wall surface portion 63e of the lower-stage frozen storage container 63. By abutting the upper rib 63f extending in the depth direction on the flange, the middle stage refrigerated storage container 62 can be smoothly slid without being laterally shifted when the middle stage refrigerated storage container 62 is pulled out. It can prevent leaking out from between. Further, as shown in FIG. 7, lower front ribs 61 e and 62 i extending in the width direction are also provided in front of the cold air slits 61 a and 62 a of the upper refrigerated storage container 61 and the middle refrigerated storage container 62, and these The front ribs 61e and 62i are in contact with the front flanges of the middle refrigerated storage container 62 and the lower refrigerated storage container 63 to prevent leakage of cold air from the front portion of each storage container toward the lower refrigeration chamber door 5a. Can do.

  Again, in order to allow the cold air flowing into the upper refrigerated storage container 61 to flow into the upper refrigerated storage container 62 in the upper refrigerated storage container 62, which is not shown in the drawing, A plurality of cold air slits 61 a and 61 b are opened from the bottom to the bottom, and a downward rib 61 d is provided outside the side cold air slit 61 b of the upper refrigeration storage container 61, and the side flange of the middle refrigeration storage container 62 is provided. By contacting the upper rib 62g, the cool air is allowed to flow out to the middle refrigerated storage container 62, and the cool air is not exposed from the gap between the upper refrigerated storage container 61 and the middle refrigerated storage container 62.

  With such a configuration of the storage container, the cold air flowing into each storage container of the lower freezer compartment 5 does not flow out of the storage container after cooling the whole storage container, so the lower freezer compartment door 5a or lower side Since the heat insulation partition wall 29 is not cooled, heat inflow from the outside air or the vegetable compartment 6 to the lower freezer compartment 5 is suppressed, so that it can contribute to energy saving.

  In addition, although the present Example demonstrated the case of the freezer compartment provided with three steps | paragraphs of storage containers, in the storage room provided with the drawer | drawing-out multi-stage storage container which employ | adopted the drawer door, even in a refrigerator compartment and a vegetable compartment The present invention can be applied.

  As described above, according to the present embodiment, when the lower freezer compartment door is pulled out, the storage volume of the lower storage container that is pulled out most is small, so that the amount of cool air that leaks to the outside decreases, and as a result, the leaked cool air Since the electric power of the drive motor of the compressor for replenishing can be reduced, energy saving can be achieved.

  In addition, since the storage container with a large storage volume and a large amount of cool air required is a middle-stage frozen storage container instead of the bottom, the distance from the blower to the cool air outlet is shortened, so that the resistance to cool air can be reduced, and the blower It will become possible to reduce the power of.

  Further, since the cold air flowing into each storage container in the lower freezer compartment cools the entire storage container and does not flow out of the storage container, it does not cool the lower freezer compartment door and the lower heat insulating partition wall. In addition, heat inflow from the vegetable compartment to the lower freezer compartment can be suppressed, which can contribute to energy saving.

  As described above, in the conventional refrigerator, when the stored food in any one of the lower storage container, the middle storage container, and the upper storage container is taken out, the lower storage container is always exposed most to the outside air. When the volume of the lower storage container is made large as in the conventional case, the cold air leaks to the outside by this amount, and instead it is replaced with the warm external air. When the freezer compartment door is closed, the temperature sensor installed therein detects that the temperature of the freezer compartment has risen, and the compressor provided in the refrigerator is driven to replenish cold air. For this reason, it is necessary to give extra electric power to the electric motor that drives the compressor, which is not preferable from the viewpoint of energy saving.

  In contrast, in the present invention, the storage volume of the middle storage container between the upper storage container and the lower storage container is maximized, and at least the storage volume of the lower storage container is reduced. As a result, when the drawer door is pulled out, the storage volume of the lower storage container that is pulled out to the outside is small, so the amount of cold air that leaks to the outside decreases, and as a result, the compressor drive motor that replenishes the leaked cold air Since electric power can be reduced, energy saving can be achieved.

  DESCRIPTION OF SYMBOLS 1 ... Refrigerator main body, 2 ... Refrigeration room, 3 ... Ice making room, 4 ... Upper freezing room, 5 ... Lower freezing room, 6 ... Vegetable room, 7 ... Cooler, 8 ... Cooler storage room, 9 ... Blower, 12 ... Lower refrigeration compartment air duct, 13 ... partition member, 17 ... cooler storage chamber return opening, 61 ... upper refrigeration storage container, 62 ... middle refrigeration storage container, 63 ... lower refrigeration storage container, 5a ... lower refrigeration compartment door, 61a, 62a ... door side cold air slit, 61b, 62b ... side surface side cold air slit, 63a ... return cold air slit.

Claims (6)

A storage chamber that is opened and closed by a drawer door, a multi-stage storage container that can be pulled out in the front-rear direction of the storage chamber by the drawer door, a cooler that generates cool air to be supplied to the storage chamber, and the cooler A refrigerator including a cooler storage chamber, a blower provided above the cooler for blowing cool air to the storage chamber, and a partition member partitioning the cooler storage chamber and the storage chamber,
The multi-stage storage container of the storage chamber includes a lower storage container, a middle storage container overlaid on the lower storage container, and an upper storage container, wherein the storage capacity of the middle storage container is maximized. refrigerator. The refrigerator according to claim 1,
A drawer frame is provided on the drawer door, and the lower storage container is suspended from the drawer frame so that when the drawer door is pulled out, only the lower storage container is pulled out together with the drawer door. . The refrigerator according to claim 1,
The drawer door is provided with a drawer frame, and the lower storage container is suspended from the drawer frame, so that when the drawer door is pulled out, only the lower storage container is pulled out together with the drawer door, and at least the middle storage. The refrigerator is characterized in that the container is pulled out partway by an engaging portion provided in the lower storage container. The refrigerator according to claim 1,
Cold air sent from the blower is supplied to the middle storage container and the upper storage container from a cold air blowing opening provided in a partition member, and cold air from the middle storage container is supplied to the lower storage container. Refrigerator. The refrigerator according to any one of claims 1 to 4,
On the wall surface on the door side of the upper storage container and the middle storage container, a cold air slit is formed to flow the supplied cold air to the lower storage container, and on the partition member side wall surface of the lower storage container, A refrigerator having a return cool air slit formed to flow cool air of the lower storage container into the cooler housing chamber. The refrigerator according to claim 5,
A first lower rib extending in a depth direction and extending downward in the lower side of the side wall surface portion of the upper storage container and the middle storage container, the upper storage container, and the middle storage container A second lower rib extending in the width direction and extending downward is provided on the lower side of the door side wall surface portion, and the lower storage container and the intermediate storage container have the first lower rib. An upper rib of 1 and a second upper rib extending in the width direction and extending upward in the upper side of the door side wall surface portion of the lower storage container and the intermediate storage container,
When the drawer door is in a closed state, the first lower rib and the first upper rib are in contact with each other, and the second lower rib and the second upper rib are in contact with each other.

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