WO2019171533A1

WO2019171533A1 - Refrigerator

Info

Publication number: WO2019171533A1
Application number: PCT/JP2018/008986
Authority: WO
Inventors: 荒木　正雄; 花輪　純
Original assignee: 三菱電機株式会社
Priority date: 2018-03-08
Filing date: 2018-03-08
Publication date: 2019-09-12
Also published as: JP6937890B2; JPWO2019171533A1

Abstract

This refrigerator is provided with: a refrigerator main body in which an opening is provided in a front surface, the refrigerator main body having at least one storage chamber; double-door-type left and right door parts that cover the opening of the storage chamber so as to be capable of opening and closing; a partition member that blocks a gap part from the storage-chamber side, the gap part being provided at the boundary between the left and right door parts; and gaskets provided along the peripheral edges of the left and right door parts. The partition member has a concave frame member, a front surface plate that covers the open surface of the frame member, and a heating unit that heats the front surface plate. The gaskets have: a magnetic-body-holding part in which a magnetic body that tightly fastens the front surface plate is inserted, the magnetic-body-holding part being provided adjacent to a side surface part of the gap part; a hollow structure part in which a hollow part is formed along the height direction of the storage chamber, the hollow structure part being provided to a side surface part of the magnetic-body-holding part; and a fin part that protrudes toward the gap part from the hollow structure part.

Description

refrigerator

The present invention relates to a refrigerator having a double door that closes an opening of a storage room.

A refrigerator has a configuration having a double door that closes an opening of a storage chamber formed in the refrigerator body. The double door type door is composed of a refrigerator compartment left door and a refrigerator compartment right door, and a partition member closing a gap provided between the refrigerator compartment left door and the refrigerator compartment right door. The partition member has a heat transfer member and a heating unit such as a heater for heating the heat transfer member in order to prevent dew generated on the surface due to a temperature difference between the outside air and the inside of the refrigerator compartment. In the refrigerator, the surface temperature is adjusted by changing the heating by the heating unit at a time rate in accordance with the room temperature and humidity of the place where it is installed, thereby improving energy saving.

For example, in the refrigerator disclosed in Patent Document 1, the heat transfer member is made of a synthetic resin, and the heating portion is linearly arranged along the longitudinal direction of the heat transfer member. The heating unit has a configuration in which a plurality of portions having different calorific values are formed by one heater, and the calorific value at the center portion is larger than both ends in the longitudinal direction of the partition member.

In the refrigerator disclosed in Patent Document 2, when the temperature distribution in the refrigerator compartment is divided into an upper region, an intermediate region, and a lower region in the height direction, the upper region is in a relatively high temperature state, and the intermediate region Is a configuration in which the amount of heat generation is adjusted based on a relatively low temperature state and a lower region in a relatively medium temperature state. Specifically, in this refrigerator, the heater in the middle region is formed in a dense zigzag shape so that the unit heating value is relatively large, and the heater in the lower region is formed in a slightly rough zigzag shape. Therefore, the unit heat generation amount is set to be relatively medium, and the unit heat generation amount is relatively small by forming the heater in the upper region in a straight shape.

Japanese Patent No. 5919582 Japanese Patent Laying-Open No. 2015-148366

By the way, the partition member is provided with a gap between the top surface and the bottom surface of the refrigerator compartment so that the partition member can be smoothly rotated. For this reason, gaskets provided along the periphery of the refrigerator compartment left door and refrigerator compartment right door protrude from the side surface portion of the gasket toward the gap portion, and the gap portions provided above and below the partition member are provided in the refrigerator. A fin portion is provided to be closed from the outer surface side. The left and right fin portions are configured to overlap each other and close the gap when the refrigerator door and the refrigerator door are closed.

Since the fin portion is directly exposed to the cold air in the refrigerator compartment flowing from the gap portion, the temperature is likely to be lower than the surface of the partition member. In addition, a magnetic body holding portion for holding a magnetic body such as a magnet for closely attaching the partition member by magnetic force is provided in a portion adjacent to the fin portion of the gasket 6. Since the magnetic body has a larger heat capacity than the gasket, even when cooling in the refrigerator is stopped, it is difficult to increase the temperature, and in particular, it is difficult to increase the temperature in the vicinity of the refrigerator compartment. Therefore, at the base portion of the fin portion adjacent to the magnetic body, the temperature is difficult to increase due to the influence of the magnetic body, and dew is likely to occur. That is, in the refrigerators disclosed in Patent Documents 1 and 2, it is necessary to perform extra heating in the heating unit so that the root portion of the fin portion is not dewed, and there is a possibility that the energy saving performance is inferior.

The present invention has been made to solve the above-described problems, and can increase the temperature of the root portion of the fin portion without excessive heating in the heating portion and suppress the occurrence of dew. The purpose is to provide a refrigerator that can.

The refrigerator according to the present invention is provided with an opening on the front surface, a refrigerator main body having at least one storage chamber, a double door type left and right door portion that opens and closes the opening portion of the storage chamber, and the left and right door portions. A partition member that closes the gap provided at the boundary from the storage chamber side, and a gasket that is provided along a peripheral edge of the left and right door portions, the partition member including a concave frame member, A magnetic body that has a front plate that closes the opening surface of the frame member, and a heating unit that heats the front plate, and the gasket is provided with a side surface adjacent to the gap portion and closely contacts the front plate Inserted into the magnetic body holding portion, the hollow structure portion provided in the side surface portion of the magnetic body holding portion and having a hollow portion formed along the height direction of the storage chamber, and the hollow structure portion from the A fin that protrudes toward the gap, It is what you are.

According to the present invention, since the hollow structure portion provided on the side surface portion of the magnetic body holding portion functions as a heat insulating layer, the temperature of the root portion of the fin portion can be set without performing extra heating in the heating portion of the partition member. It can be increased and the occurrence of dew can be suppressed.

It is a front view of the refrigerator which concerns on embodiment of this invention. It is the refrigerator compartment left door of the refrigerator which concerns on embodiment of this invention, Comprising: It is the rear view which showed the state which removed the gasket. FIG. 3 is a sectional view taken along the line III-III in section A shown in FIG. 1 and showing only the front side portion of the refrigerator. FIG. 4 is a cross-sectional view taken along the line IV-IV shown in FIG. 3. FIG. 5 is a cross-sectional view taken along line VV shown in FIG. 3. It is the A section shown in Drawing 1, and is the perspective view showing the state where the refrigerator compartment left door was closed and the refrigerator compartment right door was opened. It is explanatory drawing which showed typically the structure of the hollow structure part of the refrigerator which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof is omitted or simplified as appropriate. Moreover, about the structure as described in each figure, the shape, a magnitude | size, arrangement | positioning, etc. can be suitably changed within the scope of the present invention.

Embodiment.
First, the whole structure of the refrigerator 100 of this Embodiment is demonstrated based on FIG. FIG. 1 is a front view of a refrigerator according to an embodiment of the present invention. As shown in FIG. 1, the refrigerator 100 includes a refrigerator main body 1 having an opening on the front surface, the interior of which is divided by a plurality of partition plates and provided with a plurality of stages of storage rooms, and the front surface of the refrigerator main body 1. And a door portion that closes and opens the opening of each storage chamber. In the refrigerator body 1, a sealed space is formed by a resin inner box which is the inside of the refrigerator 100 and a steel plate outer box which is the outside of the refrigerator 100. A vacuum heat insulating material is installed in the inside sealed by the inner box and the outer box, and is filled with a foam heat insulating material such as urethane foam. Although omitted from the drawing, a compressor, a cooling fan, and the like constituting the refrigeration cycle are housed on the back side of the refrigerator body 1.

As an example, the multi-stage storage room includes a refrigerator room 10, an ice making room 11, a small freezer room 12, a vegetable room 13, and a freezer room 14 in order from the top. Each storage room is distinguished by a settable temperature zone (set temperature zone). For example, the refrigerator compartment 10 is about 3 ° C., the ice making room 11, the small freezer compartment 12 and the freezer compartment 14 are about −12 ° C. to − 18 degreeC and the vegetable compartment 13 can be set to about 5 degreeC. The configuration of the multi-stage storage chamber is not limited to the illustrated configuration. Further, the set temperature of each storage room is not limited to this, and the setting can be appropriately changed according to the installation location and contents.

The refrigerator compartment 10 is frequently used, and is arranged in the uppermost stage where the user can take in and out without bending his / her waist. The front opening of the refrigerating room 10 is provided with a double door type left and right door part 10 a configured by a left door 2 and a right door 3. The refrigerating room left door 2 and the refrigerating room right door 3 are pivotally supported by hinge portions that respectively support the door rotation shaft. The boundary between the refrigerating compartment left door 2 and refrigerating compartment right door 3, in order to enable the opening and closing of the refrigerating compartment left door 2 and refrigerating compartment right door 3, the gap portion S ₁ is provided. Although illustration is omitted, a temperature sensor for measuring the temperature of the installation location and the humidity of the installation location are provided on the upper side of the left side of the refrigerator compartment 2 in order to realize an optimum operation according to the installation environment. Humidity sensor to measure is installed. For example, since the amount of heat leakage in the refrigerator 100 is determined, the refrigeration capacity is adjusted according to the ambient temperature by changing the speed of the compressor or the speed of the cooling fan by inverter control. doing. In addition, a temperature sensor and a humidity sensor are not limited to the upper side of the refrigerator compartment left door 2, You may provide in another location.

A drawer-type ice making room door 11 a is provided at the front opening of the ice making room 11. A drawer-type small freezer compartment door 12 a is provided at the front opening of the small freezer compartment 12. A drawer type vegetable room door 13 a is provided at the front opening of the vegetable room 13. Further, a drawer-type freezer compartment door 14 a is provided at the front opening of the freezer compartment 14. Although illustration is omitted, a door gasket is attached along the inner peripheral edge of the ice making room door 11a, the small freezing room door 12a, the vegetable room door 13a, and the freezing room door 14a to prevent the indoor cold air from flowing out to the outside. It has been.

Next, the configuration of the refrigerator compartment left door 2 and the refrigerator compartment right door 3 in the present embodiment will be described in detail with reference to FIGS. FIG. 2 is a rear view of the refrigerator cold room left door according to the embodiment of the present invention with the gasket removed. FIG. 3 is a cross-sectional view taken along the line III-III in section A shown in FIG. 1 and showing only the front side portion of the refrigerator. 4 is a cross-sectional view taken along the line IV-IV shown in FIG. FIG. 5 is a cross-sectional view taken along line VV shown in FIG. FIG. 6 is a perspective view showing a portion A shown in FIG. 1 in a state where the left door of the refrigerator compartment is closed and the right door of the refrigerator compartment is opened. FIG. 7 is an explanatory view schematically showing the configuration of the hollow structure portion of the refrigerator according to the embodiment of the present invention.

As shown in FIG. 2, the refrigerator compartment left door 2 fills the interior surrounded by the door outer frame 4 made of sheet metal, the inner plate 5 made of synthetic resin, and the door outer frame 4 and the inner plate 5. Heat insulating material such as urethane foam and a gasket 6 provided along the peripheral edge of the inner plate 5. In addition, since the refrigerator compartment right door 3 is the structure similar to the refrigerator compartment left door 2, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

In addition, the refrigerating compartment left door 2, as shown in FIGS. 3 to 6, the gap portion S ₁ provided at the boundary of the refrigerating compartment left door 2 and refrigerating compartment right door 3 closes the refrigerating chamber 10, A partition member 7 that blocks the flow of air between the refrigerator compartment 10 and the outside air is attached. The partition member 7 is hinged to the refrigerator compartment left door 2 and rotates in conjunction with the opening / closing operation of the refrigerator compartment left door 2. Specifically, the partition member 7 rotates toward the inner plate 5 of the refrigerator compartment left door 2 when the refrigerator compartment left door 2 is open. On the other hand, as shown in FIGS. 4 and 5, when the refrigerator compartment left door 2 is in the closed state, the partition member 7 moves toward the gap S ₁ between the refrigerator compartment left door 2 and the refrigerator compartment right door 3. rotates to close the the clearance portion S _1.

As shown in FIGS. 3 and 4, the partition member 7 includes a concave frame member 70, a front plate 71 that closes the opening surface of the frame member 70, and a cover member 72 for attaching the front plate 71 to the frame member 70. And a heating part 73 for heating the front plate 71 and a heat insulating material 74 filled in the frame member 70.

The frame member 70 is made of synthetic resin, and is formed in a vertically long shape along the height direction of the refrigerator compartment 10 as shown in FIGS. 3 and 6. The front plate 71 is made of, for example, a metal plate. The front plate 71 is formed in a vertically long shape so as to close the opening surface of the frame member 70, and is attached to the frame member 70 by a cover member 72 made of synthetic resin. Front plate 71, the center in the width direction is the refrigerating compartment left door 2 and refrigerating compartment substantially coincides with the center of the gap portion S ₁ provided at the boundary between the right door 3. The front plate 71 is in close contact with the gasket 6 by the magnetic force of the magnetic body 61a built in the gasket 6 when the refrigerator left door 2 and refrigerator right door 3 are closed.

The heating unit 73 is disposed inside the frame member 70 and heats the front plate 71. In the refrigerator 100, when the inside of the refrigerator compartment 10 is cooled, dew may occur on the front plate 71 of the partition member 7 due to a temperature difference from the outside air. The refrigerator 100 keeps the temperature of the surface of the front plate 71 at or above the dew point temperature by heating the front plate 71 with the heating unit 73 in order to prevent the occurrence of dew.

As an example, the heating unit 73 has a configuration in which a resistance wire such as a nichrome wire is placed over the entire aluminum foil extending in the height direction of the refrigerator compartment 10. The heat of the front plate 71 heated by the heating unit 73 is transmitted to the gasket 6. The heating unit 73 generates heat by performing control to change the energization time, such as energizing for 5 seconds out of 10 seconds, according to the ambient temperature and ambient humidity detected by the temperature sensor and the humidity sensor. The heat insulating material 74 is made of, for example, foamed polystyrene, and is provided to prevent the heat of the heating unit 73 from being transmitted to the refrigerator compartment 10.

Further, as shown in FIG. 3, the partition member 7 is provided with guide members 75 having guide grooves 75a joined to the upper end portion and the lower end portion of the frame member 70 by a joining member 76 such as a screw. On the other hand, as shown in FIGS. 3 and 5, guide parts 20 having guide protrusions 21 that can be fitted in the guide grooves 75 a are provided on the ceiling surface and the bottom surface of the refrigerator compartment 10. When the opening / closing operation | movement of the refrigerator compartment left door 2 is performed, the partition member 7 will be rotated because the guide groove 75a moves along the guide projection part 21. FIG. The partition member 7 is provided with a gap S ₂ of, for example, about 2 to 5 mm between the upper and lower guide parts 20 so that the partition member 7 can be smoothly rotated.

Next, the structure of the gasket 6 attached to the refrigerator compartment left door 2 will be described. In addition, since the gasket attached to the refrigerator compartment right door 3 is the structure similar to the gasket 6 of the refrigerator compartment left door 2, the same code | symbol is attached | subjected and the description is abbreviate | omitted suitably.

The gasket 6 is made of, for example, vinyl chloride, and suppresses cold air from leaking from the refrigerator compartment 10 to the outside of the left and right door portions 10a. As shown in FIGS. 4 and 5, the gasket 6 includes a fitting portion 60 to be fitted into the groove portion 50 formed in the inner plate 5, a hollow magnetic body holding portion 61 into which the magnetic body 61 a is inserted, and a fitting. It is comprised by the flexible part 62 which connects the joint part 60 and the magnetic body holding | maintenance part 61 so that expansion-contraction is possible. The magnetic body holding portion 61 has a horizontally long rectangular shape in the width direction of the refrigerator 100 and is provided with a side portion adjacent to a gap portion S ₁ provided between the refrigerator compartment left door 2 and the refrigerator compartment right door 3. It has been. The magnetic body 61 a is a magnet as an example, and has substantially the same shape as the magnetic body holding part 61. The magnetic body 61a has a thickness in the depth direction of the refrigerator 100 of about 4 mm. As shown in FIG. 4, a packing 63 is provided between the gasket 6 and the inner plate 5 in the refrigerating chamber left door 2 to prevent cold air in the refrigerating chamber 10 from flowing into the gasket 6. Yes.

Further, as shown in FIGS. 4 to 7, the gasket 6 is provided on the side surface portion 82 of the magnetic body holding portion 61 and has a hollow structure portion in which a hollow portion 8 a is formed along the height direction of the refrigerator compartment 10. 8 is provided. As shown in FIGS. 6 and 7, the hollow structure portion 8 includes an extended wall 80 extended from the inner end edge in the height direction of the side surface portion 82 of the magnetic body holding portion 61 toward the gap portion S ₁ , The connecting wall 81 connects the outer edge in the height direction of the side surface portion 82 and the extending wall 80. That is, the hollow portion 8 a of the hollow structure portion 8 is formed by a range surrounded by the side surface portion 82 of the magnetic body holding portion 61, the extending wall 80, and the connecting wall 81. The extending wall 80 and the connecting wall 81 may be integrally formed with the magnetic body holding part 61 or may be welded to the side surface part 82 of the magnetic body holding part 61 after being formed separately. Although the hollow part 8a of the hollow structure part 8 is formed in the triangle shape as an example, it is not limited to this. The hollow structure portion 8 may be provided by appropriately changing the shape of the connecting wall 81 so as to be, for example, a rectangular or circular hollow portion.

As shown in FIG. 7, the hollow structure portion 8 is provided with a blocking portion 83 that closes both end surfaces in the height direction of the refrigerator compartment 10. When the hollow structure portion 8 is open at both ends in the height direction of the refrigerator compartment 10, an upward air flow is generated inside the hollow due to the heat generated by the heating portion 73, and the internal air is replaced. That is, the hollow structure portion 8 can prevent the upward air flow generated by the heat generation of the heating portion 73 by closing both end surfaces in the height direction of the refrigerator compartment 10 with the closing portion 83. Therefore, the hollow structure part 8 can prevent replacement of internal air due to the rising airflow, and can effectively increase the surface temperature. However, the hollow structure portion 8 is not limited to a configuration in which both end surfaces in the height direction of the refrigerator compartment 10 are closed. For example, only one end surface may be closed, or both end surfaces may be open surfaces.

Further, as shown in FIGS. 2, 5, 6 and 7, the gasket 6 of the refrigerator compartment left door 2 protrudes from the extending wall 80 constituting the hollow structure portion 8 toward the refrigerator compartment right door 3, fin portion 9a for closing the gap portion S ₂ respectively provided between the partition member 7 and the upper and lower guide parts 20 are provided above and below. On the other hand, the gasket 6 of the refrigerator compartment right door 3 also protrudes from the extending wall 80 constituting the hollow structure portion 8 toward the refrigerator compartment left door 2, and is provided between the partition member 7 and the upper and lower guide parts 20, respectively. fin portion 9b for closing the gap portion S ₂ are provided above and below. Left and

right fin portions

9a, 9b are overlapped when closed and the refrigerating compartment left door 2 and the refrigerating compartment right door 3, in the configuration for closing the gap portion S ₂ provided between the partition member 7 and the guide parts 20 is there. In addition, illustration is abbreviate | omitted about the fin part which block | closes the clearance gap between the partition member 7 and the guide part 20 of the lower part.

Fin portion

9a, 9b is because it is directly exposed to cool air of the refrigerating compartment 10 to flow through the gap portion S _2, the temperature tends to lower than the surface of the partition member 7. Furthermore, since the magnetic body 61a has a larger heat capacity than the gasket 6, even when the cooling in the refrigerator is stopped, the temperature hardly rises, and in particular, the temperature in the vicinity of the refrigerator compartment 10 hardly rises. Therefore, at the base portions of the

fin portions

9a and 9b adjacent to the magnetic body 61a, the temperature is hardly increased and dew is likely to occur due to the influence of the magnetic body 61a. In the conventional refrigerator, the temperature of the heating unit 73 is increased so that the dew does not occur at the base portions of the

fin portions

9a and 9b, but there is a problem that the energy saving performance is inferior.

Therefore, as described above, the gasket 6 of the refrigerator 100 according to this embodiment are provided to be adjacent the side surface portion 82 in the gap portion S _1, magnetic 61a to closely contact the front plate 71 has been inserted magnetic The holding part 61, the hollow structure part 8 provided on the side part 82 of the magnetic substance holding part 61 and having a hollow part 8 a formed along the height direction of the refrigerator compartment 10, and the gap S ₁ from the hollow structure part 8. And

fins

9a and 9b protruding toward the surface. Therefore, in this refrigerator 100, since the hollow structure portion 8 provided on the side surface portion 82 of the magnetic body holding portion 61 functions as a heat insulating layer, the fin portion is not heated by the heating portion 73 of the partition member 7. The temperature of the base part of 9a, 9b can be raised, and generation | occurrence | production of dew can be suppressed.

In the refrigerator 100, the hollow structure portion 8 also functions as a reinforcing portion for the root portions of the

fin portions

9a and 9b. Therefore, in the refrigerator 100, when the left and right door portions 10a are opened and closed, the lower end portion of the fin portion 9a (9b) shown as B portion in FIG. 2 is placed on the side wall surface of the opposing refrigerator compartment left door 2 or refrigerator compartment right door 3. The situation of rubbing and damage can be suppressed.

Further, the hollow structure portion 8 of the refrigerator 100 according to this embodiment, the stretching wall 80 is extended toward the gap portion S ₁ from one edge in the height direction of the side surface portion 82 of the magnetic holding unit 61, the A connecting wall 81 that connects the other end edge of the side surface portion 82 in the height direction and the extending wall 80 is provided. The hollow portion 8 a of the hollow structure portion 8 is formed by a range surrounded by the side surface portion 82 of the magnetic body holding portion 61, the extending wall 80, and the connecting wall 81. That is, since the refrigerator 100 according to the present embodiment forms the hollow structure portion 8 with a simple structure, it does not take time for processing and can contribute to an improvement in productivity.

Further, the hollow structure portion 8 of the refrigerator 100 according to the present embodiment is provided with a blocking portion 83 that closes both end surfaces of the refrigerator compartment 10 in the height direction. Therefore, since the refrigerator 100 can prevent the upward airflow generated by the heat generated by the heating unit 73 and can prevent the internal air from being replaced by the upward airflow, the surface temperature of the hollow structure portion 8 can be effectively increased. Can do.

Although the present invention has been described above based on the embodiment, the present invention is not limited to the configuration of the embodiment described above. For example, the double door type left and right doors 10a are not limited to the configuration provided in the refrigerator compartment 10, and may be provided in other storage rooms. Moreover, the partition member 7 is not limited to the structure attached to the refrigerator compartment left door 2, You may attach to the refrigerator compartment right door 3. FIG. In short, the present invention includes a range of design changes and application variations usually made by those skilled in the art without departing from the technical idea thereof.

DESCRIPTION OF SYMBOLS 1 Refrigerator main body, 2 refrigerator compartment left door, 3 refrigerator compartment right door, 4 door outer frame, 5 inner plate, 6 gasket, 7 partition member, 8 hollow structure part, 8a hollow part, 9a, 9b fin part, 10 refrigerator compartment 10a Left and right doors, 11 Ice making room, 11a Ice making room door, 12 Small freezing room, 12a Small freezing room door, 13 Vegetable room, 13a Vegetable room door, 14 Freezing room, 14a Freezing room door, 20 Guide parts, 21 Guide Projection part, 50 groove part, 60 fitting part, 61 magnetic body holding part, 61a magnetic body, 62 flexible part, 63 packing, 70 frame member, 71 front plate, 72 cover member, 73 heating part, 74 heat insulating material, 75 guide member, 75a guide groove 76 joint member, 80 extending walls 81 connecting walls 82 side portion, 83 closing part, 100 _{refrigerator,} S 1, _{S 2} clearance.

Claims

A refrigerator body having an opening on the front surface and having at least one storage chamber;
A double door type left and right door that closes and opens the opening of the storage room, and
A partition member for closing the gap provided at the boundary of the left and right doors from the storage chamber side;
A gasket provided along the periphery of the left and right door portions,
The partition member includes a concave frame member, a front plate that closes an opening surface of the frame member, and a heating unit that heats the front plate,
The gasket is
A magnetic body holding part provided with a side part adjacent to the gap part, and a magnetic body inserted into close contact with the front plate;
A hollow structure portion provided on the side surface portion of the magnetic body holding portion and having a hollow portion formed along the height direction of the storage chamber;
And a fin portion protruding from the hollow structure portion toward the gap portion.
The hollow structure part is
An extended wall extended from one end edge in the height direction of the side surface portion of the magnetic body holding portion toward the gap portion;
A connecting wall connecting the other end edge in the height direction of the side surface portion and the extending wall;
The refrigerator according to claim 1, wherein the hollow portion is formed by a range surrounded by the side surface portion, the extending wall, and the connecting wall.
The refrigerator according to claim 1 or 2, wherein the hollow structure portion is provided with a closing portion that closes both end faces in the height direction of the storage chamber.