JP2012242072A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator capable of suppressing thermal transfer of cold in a storage chamber.SOLUTION: The refrigerator 1 includes: a box 2 which comprises an outer box 2a forming the exterior of a body of the refrigerator 1 and an inner box 2b forming an inner wall of the body, and has its front side opened; a partition wall which partitions the inner space of the box 2 into a plurality of storage chambers; and a door which is provided to a front opening of each storage chamber. At least one of the box 2, partition wall, and door is provided with a vacuum heat insulating material 100 and a cold storage material 110, and the cold storage material 110 is arranged on the inside of the refrigerator from the vacuum heat insulating material 100.

Description

  The present invention relates to a refrigerator.

  In a conventional refrigerator, for example, “the compressor 8, the condenser 9, and the expansion / decompression means 11A, 11B constitute a refrigeration cycle, and the refrigerator 1 that cools the interior of the refrigerator has a day / night operating power consumption adjusting means. In the cold storage room 2, cold storage is performed in a cold storage tank 15 containing a chemical agent such as ethylene glycol, and in the daytime, a desired cooling performance is obtained using the cold air 19 in the cold storage room 15. (For example, refer to Patent Document 1).

JP-A-4-254181 (Abstract)

In conventional refrigerators, a cold storage room is formed in addition to a storage room for storing food and the like for the purpose of improving the daytime power peak, and a cold storage that contains a chemical agent (cool storage material) in this cold storage room It is set as the structure which arrange | positions the tank and the evaporator (cooler) for cooling this, and cools it.
However, since a separate cooler is provided in the cold storage chamber, there is a problem that the configuration of the refrigerant circuit becomes complicated. In addition, since the cold storage room is provided separately from the storage room, there is a problem that the storage capacity of the storage room in the refrigerator body is reduced.

On the other hand, for example, when the cooling operation is stopped or the cooling capacity is reduced to reduce power consumption at the peak of power, or when the cooling operation is stopped due to a planned or unexpected power failure, the heat transfer of the cold heat in the warehouse It is desirable to suppress the rise in the internal temperature.
In addition, when providing a plurality of storage rooms having different set temperature zones, such as when a freezing room that cools to a temperature below freezing and a refrigerating room that cools to a temperature below freezing, for example, are arranged adjacent to each other, It is desired to suppress not only the heat transfer from the inside of the storage room to the outside of the storage room, but also the cold heat transfer between the storage rooms to reduce the rise in the inside temperature of the storage room.

This invention is made in order to solve the above subjects, and obtains the refrigerator which can suppress the heat transfer of the cold heat in a storage chamber.
Moreover, even if it is a case where cooling operation stops or cooling capacity falls, the refrigerator which can reduce the raise of internal temperature is obtained.
Moreover, the refrigerator which can store cold heat without reducing the capacity | capacitance of a storage room by simple structure, without providing a cold storage room separately is obtained.

  A refrigerator according to the present invention includes an outer box that forms an outer shell of a refrigerator main body and an inner box that forms an inner wall of the main body. And at least one of the box, the partition wall, and the door is provided with a vacuum heat insulating material and a cold storage material. The cold storage material is disposed on the inner side of the vacuum heat insulating material.

In this invention, since the vacuum heat insulating material and the cold storage material are provided on at least one of the partition wall that partitions the freezer compartment and the refrigerator compartment, and at least one of the box, the partition wall, and the door, Heat transfer can be suppressed.
Moreover, it is possible to store the cold without reducing the capacity of the storage room with a simple configuration without providing a separate cold storage room.
Even if the cooling operation is stopped or the cooling capacity is lowered, the rise in the internal temperature can be reduced.

1 is an external perspective view of a refrigerator according to Embodiment 1. FIG. 2 is a side cross-sectional view of the refrigerator according to Embodiment 1. FIG. 3 is a front sectional view of the refrigerator according to Embodiment 1. FIG. 3 is a side cross-sectional view of a main part of the refrigerator according to Embodiment 1. FIG. 3 is a front cross-sectional view of a main part of the refrigerator according to Embodiment 1. FIG. 3 is a side cross-sectional view of a main part of the refrigerator according to Embodiment 1. FIG. 3 is a diagram illustrating a configuration of a storage container according to Embodiment 1. FIG. It is a figure which shows the structure of the mounting shelf which concerns on Embodiment 1. FIG. It is a figure which shows the thermal storage amount characteristic of the latent-heat cold storage material which concerns on Embodiment 1. FIG. It is a figure explaining the change of the internal temperature of the refrigerator which concerns on Embodiment 1. FIG.

Embodiment 1 FIG.
(overall structure)
1 is an external perspective view of a refrigerator according to Embodiment 1. FIG.
FIG. 2 is a side sectional view of the refrigerator according to the first embodiment.
FIG. 3 is a front sectional view of the refrigerator according to the first embodiment.
1-3, the refrigerator 1 is provided with the box-shaped box 2 with the front side opened.
The box 2 is composed of an outer box 2a that forms the outer shell of the refrigerator main body and an inner box 2b that forms the inner wall of the main body, and a heat insulating material 120 such as urethane is provided therebetween. Inside the box 2, partition walls 21 to 24 that partition the internal space of the box 2 into a plurality of storage chambers are provided.
In the present embodiment, a refrigerator room 5, an ice making room 6, a switching room 7, a freezer room 8, and a vegetable room 9 are provided as storage rooms.
At least the ice making chamber 6, the switching chamber 7, and the freezing chamber 8 are provided with a vacuum heat insulating material that suppresses the heat transfer of the internal cold and a cold storage material that stores the internal cold. Details of this heat insulation and cold storage structure will be described later.

The refrigerator compartment 5 is provided at the top of the refrigerator 1. The lower surface of the refrigerator compartment 5 is partitioned by a partition wall 21.
The ice making room 6 and the switching room 7 are provided side by side on the lower side of the refrigerating room 5. The right side surface of the ice making chamber 6 and the left side surface of the switching chamber 7 are partitioned by a partition wall 24. Further, the lower surfaces of the ice making chamber 6 and the switching chamber 7 are partitioned by a partition wall 22.
The freezing room 8 is provided below the ice making room 6 and the switching room 7. The upper surface of the freezer compartment 8 is partitioned by a partition wall 22, and the lower surface of the freezer compartment 8 is partitioned by a partition wall 23.
The vegetable compartment 9 is provided below the freezer compartment 8 and at the bottom of the refrigerator 1. The upper surface of the vegetable compartment 9 is partitioned by a partition wall 23.

Each storage room is distinguished by a settable temperature zone (set temperature zone). For example, the refrigerator compartment 5 is about 0 ° C. to 4 ° C., the vegetable compartment 9 is about 3 ° C. to 10 ° C., and the ice making room 6 is about −18 ° C. and the freezer compartment 8 can be set to about −16 ° C. to −22 ° C., respectively. The switching chamber 7 can be switched to a temperature range such as chilled (about 0 ° C.) or soft refrigeration (about −7 ° C.).
Thus, the set temperature zones of the refrigerator compartment 5 and the vegetable compartment 9 are set to be higher than the ice making compartment 6, the switching compartment 7, and the freezer compartment 8.
The set temperature of each storage room is not limited to this.

Note that “ice making chamber 6”, “switching chamber 7”, and “freezer chamber 8” in the present embodiment correspond to “freezer chamber” in the present invention. Hereinafter, storage chambers having a set temperature zone below the freezing point, such as the ice making chamber 6, the switching chamber 7, and the freezing chamber 8, are also referred to as “freezing chamber group”.
Further, “refrigeration room 5” and “vegetable room 9” in the present embodiment correspond to “refrigeration room” in the present invention.
In addition, the number and arrangement | positioning of each store room are not limited to this. What is necessary is just a structure which has one or several freezer compartment as a storage room, and one or several refrigerator compartment whose setting temperature zone is higher than this freezer compartment.

Doors 10 to 14 are provided at the front opening of each storage room.
A double door (hinge type) door 10 is attached to the front opening of the refrigerator compartment 5 so as to be freely opened and closed.
A plurality of mounting shelves 40 are provided inside the refrigerator compartment 5, and an object to be cooled such as food can be placed by opening the door 10. In addition to or instead of the mounting shelf 40, a storage container 50 described later may be disposed.

Draw-out type doors 11 to 14 are provided at the front opening portions of the ice making chamber 6, the switching chamber 7, the freezing chamber 8, and the vegetable chamber 9, respectively, so that they can be opened and closed.
The ice making room 6, the switching room 7, the freezing room 8, and the vegetable room 9 each contain one or more storage containers 50 that move in the front-rear direction, and can store objects to be cooled such as food. It has become. In addition to or in place of the storage container 50, the storage shelf 40 may be disposed.

A partition wall 25 is provided on the back side of the storage chamber, and an air passage 200 and a cooler chamber 30 are formed between the front side of the back wall of the box 2 (the front side of the inner box 2b) and the partition wall 25. Yes.
The air path 200 is provided, for example, in a range facing the back side of the refrigerating room 5, the ice making room 6, and the switching room 7.
The cooler chamber 30 is provided, for example, in a range facing the back side of the freezing chamber 8.
A cooler 32 is provided in the cooler chamber 30, and a blower 33 is provided above the cooler 32.

In the partition wall 25 of each storage chamber, an inflow port through which the cool air from the cooler 32 flows into the storage chamber and an outflow port through which this cool air flows out from the storage chamber to the cooler chamber 30 are formed.
As shown in FIG. 3, the partition wall 25 of the refrigerator compartment 5 is provided with an inflow port 251 and an outflow port 252.
An inlet 261 and an outlet 262 are provided in the partition wall 25 of the ice making chamber 6.
An inlet 271 and an outlet 272 are provided in the partition wall 25 of the switching chamber 7.
An inlet 281 and an outlet 282 are provided in the partition wall 25 of the freezer compartment 8.
The partition wall 25 of the vegetable compartment 9 is provided with inlets 291a and 291b and outlets 292a and 292b.

Out of these inlet and outlet, the outlet 252 of the refrigerator compartment 5 and the outlet 282 of the freezer compartment 8 communicate with each other through a back air passage 201 provided on the back side of the switching chamber 7.
The other end of the rear air passage 201 is connected to the return port 202 to the cooler chamber 30.
Further, the outlet 272 of the switching chamber 7 and the outlet 282 of the freezer compartment 8 communicate with each other through an air passage (not shown), and the outlet 262 of the ice making chamber 6 and the outlet 282 of the freezer compartment 8 are not shown. Communicated by In addition, the outlets 292 a and 292 b of the vegetable compartment 9 communicate with the lower part of the cooler compartment 30.

  In the above description, the case where the inlet and the outlet are formed in the partition wall 25 of each storage chamber has been described. However, the present invention is not limited to this. For example, an outlet may be provided in a partition wall that partitions between storage chambers having a set temperature range close to each other, and the storage chambers may be communicated with each other. For example, the ice making chamber 6 and the freezing chamber 8 may be communicated with each other.

(Refrigeration cycle operation and internal air flow)
Next, the operation of the refrigeration cycle mounted on the refrigerator 1 and the air flow in the refrigerator 1 will be described.

A compressor 31 is disposed at the bottom of the back surface of the refrigerator 1.
The refrigerant compressed by the compressor 31 is condensed in a condenser (not shown). The condensed refrigerant is decompressed in a capillary tube (not shown). The decompressed refrigerant is evaporated in the cooler 32, and the periphery of the cooler 32 is cooled by the endothermic action during the evaporation. A compressor 31, a condenser (not shown), a capillary tube (not shown) as a decompressor, and a cooler 32 constitute a refrigeration cycle.
The blower 33 blows the cool air cooled around the cooler 32 to each storage room.
The compressor 31 and the blower 33 are controlled by a control circuit (not shown). The control circuit detects the temperature in each storage chamber using, for example, a temperature sensor, adjusts the cooling capacity of the refrigeration cycle and the air volume by opening / closing the damper so that the target set temperature is reached, and controls the start / stop of the cooling operation. Moreover, the operation of the blower 33 is controlled.
In addition, the control circuit according to the present embodiment stops the cooling operation or lowers the cooling capacity in a predetermined time zone including a time zone during which the power demand of commercial power reaches a peak. Details will be described later.

Part of the air cooled by the cooler 32 flows into the refrigerator compartment 5 from the inlet 251 through the air passage 200.
The air that flows into the refrigerator compartment 5 cools foods and the like placed on the placing shelf 40 of the refrigerator compartment 5, and then flows out from the outlet 252 to the rear air passage 201.
A part of this air merges with the air that has flowed out from the outlet 282, and flows out from the return port 202 to the upstream side of the air flow in the cooler chamber 30.
In addition, the remainder of the air that has flowed into the rear air passage 201 from the outlet 252 flows into the vegetable compartment 9 from the inlets 291a and 291b through the air passage (not shown), and the air in the cooler compartment 30 from the outlets 292a and 292b. Outflow upstream.

Part of the air cooled by the cooler 32 flows into the ice making chamber 6 from the inlet 261 through the air passage 200.
A part of the air cooled by the cooler 32 flows into the switching chamber 7 from the inlet 271 through the air passage 200.
A part of the air cooled by the cooler 32 flows into the freezer compartment 8 from the inlet 281 through the air passage 200.

The air that has flowed into the freezer compartment 8 cools food and the like in the storage container 50 of the freezer compartment 8 and then flows out from the outlet 282 to the rear air passage 201. Then, this air flows out from the return port 202 to the upstream side of the air flow in the cooler chamber 30.
The air that has flowed into the switching chamber 7 and the ice making chamber 6 flows out of the outlets 272 and 263 after cooling the interior of the warehouse. And the air which flowed out from each of the switching chamber 7 and the ice making chamber 6 flows into the air flow upstream of the cooler chamber 30 from the return port 202 through a back air passage (not shown).

(Insulation and cold storage structure)
Next, the heat insulation and cold storage structure of the refrigerator 1 in the present embodiment will be described.
FIG. 4 is a side cross-sectional view of a main part of the refrigerator according to the first embodiment.
FIG. 5 is a front cross-sectional view of a main part of the refrigerator according to the first embodiment.
As shown in FIGS. 4 and 5, the refrigerator 1 according to the present embodiment includes the entire inner wall of the freezer compartment group (the ice making compartment 6, the switching compartment 7, and the freezer compartment 8) in the box 2 and the partition wall 21. , 22 and 23 and the entire surfaces of the doors 11, 12 and 13 are provided with a vacuum heat insulating material 100 and a cold storage material 110.
Furthermore, a cold storage material 110 is provided on the partition wall 24 that forms the inner walls of the ice making chamber 6 and the switching chamber 7.

In the present embodiment, the case where the vacuum heat insulating material 100 is provided only on the portion forming the inner wall of the freezer compartment group (the ice making compartment 6, the switching compartment 7, and the freezer compartment 8) will be described. It is not limited to. For example, the vacuum heat insulating material 100 may be provided on the entire surface of the box 2.
Moreover, although this Embodiment demonstrates the case where the vacuum heat insulating material 100 is provided in the partition walls 21-23, this invention is not limited to this. For example, you may make it provide the vacuum heat insulating material 100 in any one of the partition wall 21 or the partition wall 22, and you may provide the vacuum heat insulating material 100 also in the partition wall 24 in addition to the partition walls 21-23.
In other words, the vacuum heat insulating material 100 may be provided on the partition wall that separates the freezer compartment 8 and the storage compartment (the refrigeration compartment 5 and the vegetable compartment 9) having a higher set temperature zone than the freezer compartment 8.

Here, the vacuum heat insulating material 100 is made up of the box 2, the partition walls 21 to 23, and the doors 11 to 13 constituting the inner wall of the freezer compartment group (the ice making compartment 6, the switching compartment 7, and the freezer compartment 8). Although the case where it is provided on the entire surface (excluding the rear surface) will be described, the present invention is not limited to this, and is provided in at least one arbitrary position of the box 2, the partition walls 21 to 23, and the doors 11 to 13. You may do it.
In addition, although the case where the cool storage material 110 is provided in all the inner wall surfaces (except for the back surface) of the ice making chamber 6, the switching chamber 7, and the freezing chamber 8 is described here, the present invention is not limited to this and is desired. An arbitrary amount can be arranged at an arbitrary position according to the heat storage capacity. In addition, in order to efficiently transmit the cold energy stored in the cold storage material 110 to the interior, it is desirable to provide at least the upper surface (partition walls 21 and 22) among the inner wall surfaces.

Next, the details of the heat insulation / cold storage structure of each configuration will be described.
In addition, since the heat insulation and cold storage structure of the ice making chamber 6, the switching chamber 7, and the freezer compartment 8 are substantially the same, the freezer compartment 8 is demonstrated to an example.

[Box]
In the box 2, for example, a heat insulating material 120 is provided between an outer box 2 a formed of a steel plate and an inner box 2 b formed of a resin material.
The vacuum heat insulating material 100 provided in the box body 2 is disposed between the inner box 2 b and the heat insulating material 120. That is, the vacuum heat insulating material 100 provided in the box 2 is arranged on the inner side (freezer compartment 8 side) than the heat insulating material 120.
Moreover, the cool storage material 110 provided in the box 2 is disposed between the vacuum heat insulating material 100 and the inner box 2b. That is, the regenerator material 110 provided in the box 2 is disposed on the inner side (freezer compartment 8 side) than the vacuum heat insulating material 100 between the outer box 2a and the inner box 2b.
Thus, between the outer box 2a and the inner box 2b, the heat insulating material 120, the vacuum heat insulating material 100, and the cool storage material 110 are laminated | stacked in an order from the warehouse outer side.
In addition, the arrangement | positioning position of the cool storage material 110 should just be an inner side rather than the vacuum heat insulating material 100, and may be arrange | positioned on the inner surface of the inner box 2b.

[Partition wall]
The partition wall 22 is formed in a plate shape by, for example, a resin material, and is formed by providing a heat insulating material 120 between the partition plate 22a and the partition plate 22b facing each other. The partition plate 22a is disposed on the ice making chamber 6 and the switching chamber 7 side, and the partition plate 22b is disposed on the freezing chamber 8 side.
The vacuum heat insulating material 100 provided on the partition wall 22 is disposed between the partition plate 22 b and the heat insulating material 120. That is, the vacuum heat insulating material 100 provided on the partition wall 22 is arranged on the inner side (freezer compartment 8 side) than the heat insulating material 120.
Moreover, the cool storage material 110 provided in the partition wall 22 is arrange | positioned between the vacuum heat insulating material 100 and the partition plate 22b. That is, the regenerator material 110 provided on the partition wall 22 is disposed on the inner side (freezer compartment 8 side) than the vacuum heat insulating material 100 between the pair of partition plates 22a and 22b.
In addition, you may make it provide the cool storage material 110 further between the partition plate 22a and the heat insulating material 120 (ice-making chamber 6 and the switching chamber 7 side).

  Similarly, the partition wall 23 is formed by filling a heat insulating material 120 between the partition plate 23 a and the partition plate 23 b, and the vacuum heat insulating material 100 is disposed between the partition plate 23 a and the heat insulating material 120. . Moreover, the cool storage material 110 is provided between the vacuum heat insulating material 100 and the partition plate 23a.

Thus, between the pair of partition plates of the partition walls 22 and 23, the heat insulating material 120, the vacuum heat insulating material 100, and the cold storage material 110 are stacked in order from the outside of the warehouse.
In addition, the arrangement | positioning position of the cool storage material 110 should just be an inner side rather than the vacuum heat insulating material 100, and may be arrange | positioned on the inner side surface of the partition plates 22b and 23a.
In addition, you may provide the cool storage material 110 further in the whole surface inside the ice-making chamber 6 and the switching chamber 7 of the partition wall 22 (between the partition plate 22a and the heat insulating material 120).

[door]
The door 13 is formed by providing a heat insulating material 120 between a door outer plate 13a arranged on the outside of the cabinet and a door inner plate 13b arranged on the inside of the cabinet.
The vacuum heat insulating material 100 provided on the door 13 is disposed between the door inner plate 13 b and the heat insulating material 120. That is, the vacuum heat insulating material 100 provided on the door 13 is disposed on the inner side (freezer compartment 8 side) than the heat insulating material 120.
Moreover, the cool storage material 110 provided in the door 13 is arrange | positioned between the vacuum heat insulating material 100 and the door inner board 13b. That is, the regenerator material 110 provided on the door 13 is arranged on the inner side (freezer compartment 8 side) than the vacuum heat insulating material 100.
Thus, between the door outer plate 13a and the door inner plate 13b, the heat insulating material 120, the vacuum heat insulating material 100, and the cold storage material 110 are laminated in order from the outside of the warehouse.
In addition, the arrangement | positioning position of the cool storage material 110 should just be a warehouse inner side rather than the vacuum heat insulating material 100, and may be arrange | positioned on the warehouse inner surface of the door inner board 13b.

[Vacuum insulation]
The vacuum heat insulating material 100 is formed, for example, by connecting a plurality of vacuum heat insulating panels formed in a rectangular plate shape. This vacuum heat insulation panel is composed of, for example, at least a core material such as glass wool or resin and a fine material such as silica between two gas barrier films laminated with a heat welding layer made of polyethylene, polypropylene, or the like, and an aluminum layer and a surface protection layer. After inserting the powder and evacuating the inside in a predetermined evacuation device, the edge of the gas barrier film is heated and the heat-welded layers are in close contact with each other to form a rectangular plate as a whole doing.
In addition, the structure of the vacuum heat insulating material 100 is not restricted to this, What is necessary is just to decompress and seal the inside of a jacket material.

[Cool storage material]
The cold storage material 110 is configured by, for example, a latent heat storage material that stores latent heat due to a phase change (phase change between liquid and solid) as cold heat. As this latent heat storage material, for example, an aqueous solution containing ethylene glycol or a gel obtained by adding a gelling agent to this aqueous solution is sealed in a flexible bag-like member. Further, for example, the latent heat regenerator material is formed by providing an air layer in a hollow container having no flexibility and sealing it. Thus, by providing an air layer in the container that seals the latent heat regenerator material, even when the latent heat regenerator material undergoes volume expansion due to freezing, breakage of the container can be prevented.
In addition, although this embodiment demonstrates the case where a latent-heat cool storage material is used for the cool storage material 110, this invention is not limited to this. For example, a cold storage material using sensible heat using metal or resin may be used.

[Insulation]
For the heat insulating material 120, for example, a foaming agent is added to urethane or the like, between the outer box 2a and the inner box 2b, between the pair of partition plates of the partition walls 21 to 24, and the door outer plate and door inner plate of the doors 10-14. In between, it is a foam heat insulating material formed by being filled with foam.
This heat insulating material 120 has a higher thermal conductivity (lower thermal resistance) than the vacuum heat insulating material 100 and has a heat insulating property lower than that of the vacuum heat insulating material 100.

  It should be noted that “heat insulating material 120” in the present embodiment corresponds to “filling heat insulating material” in the present invention.

As described above, in the present embodiment, the entire surface of both sides of the inner wall of the freezing room group (the ice making room 6, the switching room 7, and the freezing room 8) whose set temperature zone is below freezing point, and the entire surface of the doors 11-13. In addition, a vacuum heat insulating material 100 is provided. Moreover, the vacuum heat insulating material 100 is provided in the partition wall 21 and the partition wall 23 which partition the refrigerator compartment 5 and the vegetable compartment 9, and the freezer compartment group whose set temperature zone is higher than a freezer compartment group over the whole surface. For this reason, it is possible to suppress heat entry from the outside of the refrigerator 1 to the freezer compartment (heat transfer of cold heat in the freezer compartment). Furthermore, heat entry from the storage room having a higher set temperature zone than the freezer room group to the freezer room group can be suppressed.
Moreover, since the cool storage material 110 is provided on the inner wall surface of the freezer compartment, the cold energy of the freezer compartment can be stored. For example, even if the inside temperature rises due to a decrease in cooling capacity, operation stop, opening / closing of the door, etc., the inside of the compartment can be cooled by the cold heat stored in the cold storage material 110. Therefore, temperature fluctuation in the freezer compartment can be reduced.
Moreover, since the cool storage material 110 is provided on the inner wall of the freezer compartment group, it is not necessary to separately provide a cool storage tank for storing cold heat or a cooling means for cooling the cool storage tank, and cold heat can be stored with a simple configuration. it can. Moreover, it is not necessary to provide a cold storage room separate from the storage room, and cold heat can be stored without reducing the internal capacity of the storage room with respect to the main body of the refrigerator 1.

Moreover, in this Embodiment, it has the structure where the heat insulating material 120, the vacuum heat insulating material 100, and the cool storage material 110 were laminated | stacked in order from the warehouse outer side of the freezer compartment group to the warehouse inner side.
As described above, the cold storage material 110 is arranged on the inner side of the vacuum heat insulating material 100, so that the cold energy in the storage can be stored in the cold storage material 110 without being insulated by the vacuum heat insulating material 100. Moreover, it can suppress that the cold stored in the cool storage material 110 heat-transfers to the warehouse outer side (refrigeration room side).
Moreover, it can suppress that the cold heat in a store | warehouse | chamber heat-transfers to the heat insulating material 120 by arrange | positioning the vacuum heat insulating material 100 inside the store | warehouse | chamber from the heat insulating material 120. The heat insulating material 120 has higher thermal conductivity and lower heat insulating properties than the vacuum heat insulating material 100. For this reason, if the heat insulating material 120 is arrange | positioned inside the store | warehouse | chamber from the vacuum heat insulating material 100, the cold heat in a store | warehouse | chamber will heat-transfer to the heat insulating material 120 and will be consumed for cooling of the heat insulating material 120. For example, when the internal temperature rises due to a decrease in cooling capacity, shutdown, opening / closing of the door, etc., the temperature of the heat insulating material 120 also rises accordingly, and the cold energy required for cooling the internal space increases. Become.
Moreover, the cool storage material 110 is arrange | positioned between the outer box 2a and the inner box 2b, between a pair of partition plates of a partition wall, and between the door inner board and the door outer board. For this reason, the cool storage material 110 is not exposed to the inside of the warehouse. For example, even when the cool storage material 110 is formed by sealing a liquid or gel material in a bag-like sheet, it is possible to prevent the sheet from being damaged and the contents from leaking. Moreover, the cool storage material 110 is not visually recognized by the user, and the design can be improved.

In addition to the above configuration, the vacuum heat insulating material 100 and the cold storage material 110 may be provided on the entire surface of the partition wall 25 constituting the inner wall surface of the freezer compartment other than the inlet and the outlet.
An example of such a configuration is shown in FIG.
6, in addition to the above-described configuration, the vacuum heat insulating material 100 is provided on the entire surface other than the inlet port 281 and the outlet port 282 on the inner side (front side) of the partition wall 25 of the freezer compartment 8.
With such a configuration, the freezer compartment 8 is covered with the vacuum heat insulating material 100 on substantially all surfaces except the inlet 281 and the outlet 282. Therefore, while being able to suppress the heat approach from the refrigerator 1 to the freezer compartment group, and the heat entry from the storage room whose set temperature zone is higher than the freezer compartment 8 to the freezer compartment 8, Heat entry into the freezer compartment 8 can also be suppressed. For example, this effect is significant when the cooling operation is stopped and the temperature of the cooler chamber 30 rises.

Further, in FIG. 6, the regenerator material 110 is provided on the entire surface other than the inlet port 281 and the outlet port 282 on the inner side of the vacuum heat insulating material 100 provided in the partition wall 25 of the freezer compartment 8.
With such a configuration, cold heat can be stored on the back wall of the freezer compartment 8, and even if the internal temperature rises, the inside of the refrigerator is cooled from the back side by the cold heat stored in the cold storage material 110. Can do.
In the example of FIG. 6, the case where the vacuum heat insulating material 100 and the cold storage material 110 are provided in the partition wall 25 of the freezer compartment 8 is described, but the partition wall 25 of the ice making chamber 6 or the switching chamber 7 may be provided. Moreover, you may abbreviate | omit the cool storage material 110 provided in the partition 25 according to desired heat storage capacity.
In addition, the arrangement | positioning position of the cool storage material 110 should just be an inner side rather than the vacuum heat insulating material 100, and may be arrange | positioned on the inner surface of the partition 25.

In the present embodiment, the case where the vacuum heat insulating material 100 and the cold storage material 110 are provided on the inner wall of the freezing room group (the ice making room 6, the switching room 7, and the freezing room 8) has been described, but the present invention is not limited thereto. It is good also as a structure which provides the vacuum heat insulating material 100 and the cool storage material 110 also in the inner wall of store rooms other than a freezer compartment group.
For example, for each of the refrigerator compartment 5 and the vegetable compartment 9, the vacuum heat insulating material 100 is provided on both the entire side surfaces of the inner walls of the refrigerator compartment 5 and the vegetable compartment 9 and the entire surfaces of the doors 10 and 14, as in the above-described freezer compartment group. May be provided. Moreover, you may make it provide the cool storage material 110 in the upper surface among the inner wall surfaces of the refrigerator compartment 5 and the vegetable compartment 9. FIG. And you may make it set it as the structure where the heat insulating material 120, the vacuum heat insulating material 100, and the cool storage material 110 were laminated | stacked in order from the warehouse outer side to the warehouse inner side.
Even in such a configuration, it is possible to suppress heat intrusion from the outside of the storage chamber to the inside of the warehouse. Further, the cold energy in the refrigerator can be stored in the cold storage material 110 without being insulated by the vacuum heat insulating material 100.

(Storage container)
Next, the structure of the storage container 50 and the mounting shelf 40 arranged in the storage chamber will be described.
FIG. 7 is a diagram showing the configuration of the storage container according to Embodiment 1.
FIG. 7A is an external perspective view of the storage container 50, and FIG. 7B is a side sectional view of the storage container 50.
As shown in FIG. 7, the storage container 50 in the present embodiment is formed in a box shape having an upper surface opened by, for example, a resin material. A storage shelf 40 (described later) and the like are stored.
The storage container 50 has a hollow double structure, and is configured by enclosing the regenerator material 110 therein.

With such a configuration, the regenerator material 110 can be disposed closer to the object to be cooled. Therefore, it is possible to reduce the heat storage capacity necessary for cooling the object to be cooled.
Moreover, since the cool storage material 110 is provided inside the storage container 50, it is not necessary to separately provide a cool storage tank for storing cool heat and a cooling means for cooling the cool storage tank, and the cool heat can be stored with a simple configuration. it can.
Moreover, even if it is a case where a liquid and a gel material are used as the cool storage material 110 by sealing the cool storage material 110 inside the resin storage container 50, the leakage of the cool storage material 110 can be prevented.

FIG. 8 is a diagram illustrating the configuration of the mounting shelf according to the first embodiment.
FIG. 8A is an external perspective view of the mounting shelf 40, and FIG. 8B is a side sectional view of the mounting shelf 40.
As shown in FIG. 8, the mounting shelf 40 in this Embodiment is formed in plate shape, for example with the resin material, and to-be-cooled objects, such as a foodstuff, are mounted in the upper surface.
The mounting shelf 40 has a hollow double structure, and is configured by enclosing the regenerator material 110 therein.

With such a configuration, the regenerator material 110 can be disposed closer to the object to be cooled. Therefore, it is possible to reduce the heat storage capacity necessary for cooling the object to be cooled.
Moreover, since the cool storage material 110 is provided in the mounting shelf 40, it is not necessary to separately provide a cool storage tank for storing cool heat and a cooling means for cooling the cool storage tank, and the cool heat can be stored with a simple configuration. Can do.
Moreover, even if it is a case where a liquid and a gel material are used as the cool storage material 110 by sealing the cool storage material 110 inside the resin mounting shelf 40, the leakage of the cool storage material 110 can be prevented.

(Freezing point of latent heat storage material)
Next, the relationship between the freezing point when a latent heat regenerator material is used as the regenerator material 110 and the set temperature of the storage room will be described.

The freezing point of the latent heat regenerator material is a temperature higher than the lower limit value of the set temperature range of the storage room provided with the latent heat regenerator material.
For example, as described above, the set temperature zone of the freezer compartment 8 can be set to about −16 ° C. to −22 ° C. In this case, the cold storage material 110 provided on the inner wall surface (box 2, partition walls 22 and 23, door 13) of the freezer compartment 8 and the cold storage in the storage container 50 and the mounting shelf 40 arranged in the freezer compartment 8 are provided. As the material 110, a latent heat regenerator material having a freezing point at a temperature higher than about −16 ° C. which is the upper limit value of the set temperature range is used.
As described above, the freezing point of the latent heat storage material is higher than the upper limit value of the set temperature zone, so that the latent heat storage material can be solidified by the cooling operation of the storage chamber, and the phase change between liquid and solid in the latent heat storage material The latent heat that accompanies can be stored as cold.

Moreover, the freezing point of the latent heat regenerator material provided in the freezer group (the ice making room 6, the switching room 7, and the freezing room 8) is higher than the target set temperature of the storage room and 0 ° C. or lower.
For example, when the cooling operation is controlled so that the target set temperature in the freezer compartment 8 becomes −18 ° C. during the normal cooling operation, the regenerator material 110 in the freezer compartment 8 has a latent heat with a freezing point of −15 ° C. Use cold storage material. The heat storage amount characteristic of this latent heat storage material is shown in FIG.

FIG. 9 is a diagram showing a heat storage amount characteristic of the latent heat cool storage material according to the first embodiment.
In FIG. 9, on the basis of 0 ° C., the horizontal axis indicates the temperature difference, and the vertical axis indicates the heat storage amount of the latent heat storage material. The slope of the characteristic shown in FIG. 9 corresponds to specific heat.
As shown in FIG. 9, the latent heat regenerator material absorbs heat or releases heat at the freezing point (−15 ° C.) without changing the temperature due to the latent heat accompanying the phase change. For example, when the temperature of the solidified latent heat regenerator material increases, the amount of heat corresponding to the latent heat is absorbed without increasing the temperature at the freezing point.

  Thus, in the present embodiment, the freezing point of the latent heat storage material provided in the freezer compartment group is set to a temperature (−15 ° C.) higher than the target set temperature (−18 ° C.) and 0 ° C. or lower. As a result, even if the internal temperature of the freezer compartment rises, the latent heat regenerator material rises to the freezing point (−15 ° C.) and then absorbs the amount of heat corresponding to the latent heat while maintaining this temperature. Phase change, and then the temperature rises. Therefore, even if the internal temperature rises due to, for example, a decrease in cooling capacity or operation stop, the temperature in the freezer compartment can be kept at a temperature near the freezing point of 0 ° C. or lower for a certain period of time. it can.

In addition, when providing the cool storage material 110 in the inner wall surface of the refrigerator compartment 5 and the vegetable compartment 9 whose set temperature range is 0 degreeC or more, the storage container 50 and the mounting shelf 40 are arrange | positioned in the refrigerator compartment 5 or the vegetable compartment 9. In this case, a latent heat regenerator material having a freezing point higher than 0 ° C. and higher than the upper limit value of the set temperature zone of the storage room is used for these regenerator materials 110.
For example, as described above, the set temperature zone of the refrigerator compartment 5 can be set to about 0 ° C to 4 ° C. In this case, the regenerator material 110 provided on the inner wall surface (box 2, partition wall 21, door 10) of the refrigerating chamber 5, and the regenerator material 110 in the storage container 50 and the mounting shelf 40 disposed in the refrigerating chamber 5 are used. For this, a latent heat regenerator material having a freezing point at a temperature (for example, 5 ° C.) higher than about 4 ° C. which is the upper limit value of the set temperature range is used.
Thereby, even if the inside temperature rises due to, for example, a decrease in cooling capacity or operation stoppage, the temperature in the refrigerator compartment 5 or the vegetable compartment 9 is kept near the freezing point higher than 0 ° C. for a certain period of time. Can be kept at temperature. Moreover, since the temperature in a store | warehouse | chamber does not become 0 degrees C or less, it can prevent that the to-be-cooled object in the refrigerator compartment 5 or the vegetable compartment 9 freezes.

(Cooling operation)
Next, the cooling operation operation for reducing the power consumption of the refrigerator 1 in a predetermined time zone will be described.

The control circuit of the refrigerator 1 in the present embodiment stops the cooling operation or decreases the cooling capacity in a predetermined time zone. As this predetermined time zone, for example, a time zone including a time zone in which the power demand of commercial power reaches a peak, such as daytime, is used.
Note that the predetermined time zone may be set in the control circuit in advance, or the time zone may be changed according to the season.
The setting of the predetermined time zone is not limited to this, and it may be set at an arbitrary time by an operation by the user, or setting information may be input from an external device.
Here, for example, the cooling operation is stopped in a preset daytime period, and the cooling operation (normal operation) is performed so that the temperature in the storage chamber becomes a target set temperature in the nighttime period.
The relationship between the internal temperature of the freezer compartment 8 and the passage of time by such an operation will be described with reference to FIG.

FIG. 10 is a diagram for explaining a change in the internal temperature of the refrigerator according to the first embodiment.
In FIG. 10, the horizontal axis indicates the elapsed time, and the vertical axis indicates the internal temperature in the freezer compartment 8. In the example of FIG. 10, a latent heat regenerator material having a freezing point of −15 ° C. is used for the regenerator material 110.
As shown in FIG. 10, during the night time period, the cooling operation is performed so that the target temperature in the freezer compartment 8 becomes −18 ° C. (normal operation). Thereby, while the temperature in the freezer compartment 8 is maintained at about -18 degreeC, a latent-heat regenerator material is solidified and cold is stored as latent heat.
Next, the cooling operation is stopped during the daytime. Thereby, the temperature in the freezer compartment 8 gradually rises and rises to −15 ° C., which is the freezing point of the latent heat regenerator material. The latent heat regenerator material changes its phase by absorbing heat (releasing cold energy) from the interior of the chamber while maintaining the temperature. Thereby, the temperature in the freezer compartment 8 is maintained at about -15 degreeC for a fixed time.
After the latent heat storage material absorbs the amount of heat corresponding to the latent heat and undergoes a phase change, the temperature in the freezer compartment 8 gradually increases.
Then, during the night time zone, normal operation is performed again, and the temperature in the freezer compartment 8 is cooled to the target temperature.

As described above, in the present embodiment, the cooling operation is stopped or the cooling capacity is reduced in a predetermined time zone, so that the power consumption of the refrigerator 1 in the time zone can be reduced. In addition, since the vacuum heat insulating material 100 is provided on the entire surface of both sides of the inner wall of the freezer compartment group, the entire compartment wall of the freezer compartment group and the other storage compartment, and the entire door surface, the storage of the freezer compartment group. Even when the heat transfer of cold from the inside to the outside of the warehouse and the heat transfer of cold from the freezer compartment to other storage rooms can be suppressed, even if the cooling operation is stopped or the cooling capacity is reduced The temperature rise of the freezer compartment during the time period can be reduced.
In addition, the cold storage material 110 disposed on the inner side of the vacuum heat insulating material 100 stores the cold heat without being insulated by the vacuum heat insulating material 100, so the cooling operation is stopped or the cooling capacity is reduced. Even if it is a case, the inside of a freezer compartment can be cooled, suppressing that the cold heat stored in the cool storage material 110 of a freezer compartment is thermally transferred to the exterior or another storeroom. Therefore, the temperature rise of the freezer compartment in the said time slot | zone can be suppressed.
Moreover, since the latent heat regenerator material is used as the regenerator material 110, the temperature in the freezer compartment is kept at a temperature near the freezing point for a certain time even when the cooling operation is stopped or the cooling capacity is reduced. Can keep.

  Further, in the present embodiment, the cooling operation is stopped or the cooling capacity is reduced in the time zone when the power demand for commercial power is at a peak, so the power consumption of the refrigerator 1 is reduced in the time zone when the power demand is at a peak. can do.

  1 refrigerator, 2 box, 2a outer box, 2b inner box, 5 refrigerator compartment, 6 ice making room, 7 switching room, 8 freezer room, 9 vegetable room, 10 door, 11 door, 12 door, 13 door, 13a outside door Plate, 13b door inner plate, 14 door, 21 partition wall, 22 partition wall, 22a partition plate, 22b partition plate, 23 partition wall, 23a partition plate, 23b partition plate, 24 partition wall, 25 partition wall, 30 cooler chamber, 31 compressor, 32 cooler, 33 blower, 40 mounting shelf, 50 storage container, 100 vacuum heat insulating material, 110 cold storage material, 120 heat insulating material, 200 air passage, 201 back air passage, 202 return port, 251 inlet, 252 outlet, 261 inlet, 262 outlet, 271 inlet, 272 outlet, 281 inlet, 282 outlet, 291a inlet, 291b inlet, 292a outlet, 292b Outlet.

Claims (18)

It is composed of an outer box that forms the outer shell of the refrigerator main body and an inner box that forms the inner wall of the main body, and a box body whose front side is open,
A partition wall that partitions the internal space of the box into a plurality of storage rooms;
A door provided at the front opening of each storage room,
At least one of the box, the partition wall, and the door is provided with a vacuum heat insulating material and a cold storage material,
The refrigerator characterized by arrange | positioning the said cool storage material inside the said warehouse from the said vacuum heat insulating material. The partition wall is formed by a pair of partition plates facing each other and a filling heat insulating material provided between the pair of partition plates,
The refrigerator according to claim 1, wherein the vacuum heat insulating material provided on the partition wall is disposed on the inner side of the filling heat insulating material. The refrigerator according to claim 2, wherein the vacuum heat insulating material and the cold storage material are disposed between the pair of partition plates. The box body is provided with a filling heat insulating material between the outer box and the inner box,
The refrigerator according to any one of claims 1 to 3, wherein the vacuum heat insulating material provided in the box is arranged inside the storage with respect to the filling heat insulating material. The refrigerator according to claim 4, wherein the vacuum heat insulating material and the cold storage material are disposed between the outer box and the inner box. The door is formed by a door inner plate and a door outer plate, and a filling heat insulating material provided between the door inner plate and the door outer plate,
The refrigerator according to any one of claims 1 to 5, wherein the vacuum heat insulating material provided on the door is disposed on the inner side of the filling heat insulating material. The refrigerator according to claim 6, wherein the vacuum heat insulating material and the cold storage material are disposed between the door inner plate and the door outer plate. The refrigerator according to any one of claims 2 to 7, wherein the filled heat insulating material has higher thermal conductivity than the vacuum heat insulating material. The storage room has one or a plurality of freezer rooms, and one or a plurality of refrigeration rooms having a set temperature zone higher than that of the freezer room,
The vacuum heat insulating material and the entire surface of the partition wall that partitions the freezer compartment and the refrigerator compartment, the entire inner wall of the freezer compartment of the box, and the entire surface of the door provided in the freezer compartment, and The refrigerator according to any one of claims 1 to 8, wherein the cold storage material is provided. A cooler disposed on the back side of the storage room;
A partition that partitions the cooler chamber in which the cooler is disposed and the storage chamber;
The partition wall has an inflow port for flowing cool air from the cooler into the storage chamber, and an outflow port for flowing out the cool air from the store chamber to the cooler chamber,
The refrigerator according to claim 9, wherein the vacuum heat insulating material and the cold storage material are provided on the entire surface of the partition wall constituting the inner wall surface of the freezer compartment, except for the inlet and the outlet. The said heat insulating material and the said cool storage material were provided in the whole surface of the inner wall of the said refrigerator compartment and the whole surface of the said door provided in the said refrigerator compartment among the said boxes. Refrigerator. A storage container that is disposed in the storage chamber and stores an object to be cooled;
The refrigerator according to any one of claims 1 to 11, wherein the storage container has a hollow double structure, and a regenerator material is enclosed therein. It is disposed in the storage chamber, and includes a mounting shelf on which an object to be cooled is mounted.
The refrigerator according to any one of claims 1 to 12, wherein the shelf described above has a hollow double structure, and a cold storage material is enclosed therein. The cold storage material is constituted by a latent heat cold storage material that stores latent heat due to phase change as cold heat,
The refrigerator according to any one of claims 1 to 13, wherein the freezing point of the latent heat storage material is a temperature higher than a lower limit value of a set temperature range of the storage room provided with the latent heat storage material. The refrigerator according to claim 14, which is dependent on claim 9, wherein a freezing point of the latent heat storage material provided in the freezer is higher than a target set temperature of the freezer and is 0 ° C. or less. The subordinate point of the latent heat storage material provided in the refrigerator compartment is a temperature higher than 0 ° C and lower than an upper limit value of a set temperature zone of the refrigerator compartment, The refrigerator according to claim 15. Comprising control means for controlling the cooling operation of the refrigerator,
The refrigerator according to any one of claims 1 to 16, wherein the control means stops the cooling operation or reduces the cooling capacity in a predetermined time zone. The refrigerator according to claim 17, wherein the predetermined time period includes a time period in which the power demand of commercial power reaches a peak.

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