JP7312148B2 - refrigerator - Google Patents

Description

The present invention relates to refrigerators.

Patent Literature 1 discloses a refrigerator in which "radiation pipes are installed for the purpose of maintaining the temperature of the vegetable compartment" (0042, etc.).

International publication WO2018/131157 pamphlet

However, in the refrigerator disclosed in Patent Document 1, it is necessary to dispose heat radiation pipes, which are refrigerant pipes, inside the refrigerator (see FIG. 21), and extension of the refrigerant pipes increases costs and increases the amount of suitable refrigerant. If CFCs or alternative CFCs (for example, R134a) with high ozone depletion potential or global warming potential are used, an increase in the amount of refrigerant leads to an increase in environmental load. In addition, when using a hydrocarbon-based refrigerant (for example, isobutane R600a), which is a non-Freon refrigerant, the environmental load caused by the refrigerant is small, but since it is a flammable refrigerant, considering safety, IEC standards and Japan JEMA voluntary standards limit the maximum amount of refrigerant, and in some cases, only an amount less than the proper amount of refrigerant can be filled. If the amount of refrigerant is less than the appropriate value, the cooling capacity will be lowered.

Moreover, no specific consideration is given for actually providing a heat radiation pipe inside the refrigerator. A flow switching three-way valve connected to the capillary tube is generally installed outside the storage compartment, but as shown in FIG. In particular, refrigerators equipped with a large amount of vacuum insulation material, as shown in FIG. 19 of Patent Document 1, require complex refrigerant pipes that avoid the use of vacuum insulation materials. increase and the amount of refrigerant increases.

The refrigerator of the present invention made in view of the above circumstances,
a first storage compartment that has an opening in front and can be set to a refrigerating temperature zone;
a partition wall separating the first storage chamber and the second storage chamber;
a partition cover disposed on the edge of the opening on the front surface of the partition wall;
a compressor;
a heat radiation pipe through which the refrigerant discharged from the compressor flows and a part of which is arranged on the back side of the partition cover ,
The second storage chamber is arranged on the opposite side of the partition wall from the first storage chamber, has an opening in front, and can be set to a freezing temperature zone,
As a part of the partition cover, each of the first storage chamber side and the second storage chamber side has a flange portion that folds back from the edge of the opening to the back side,
The length of the flange portion on the first storage chamber side is longer than the length on the second storage chamber side .

The front view which shows the refrigerator which concerns on 1st Embodiment II-II line sectional view of FIG. The front view which shows the air-path structure of the refrigerator which concerns on 1st Embodiment. A view showing the inside of the air passage of FIG. 3A Schematic diagram showing the air passage configuration of the refrigerator according to the first embodiment Schematic diagram showing a refrigerating cycle of the refrigerator according to the first embodiment. Diagram showing the arrangement position of wall heat radiation piping and dew condensation prevention piping A diagram showing the flow of heat when the first switchable compartment is in the refrigeration mode and the second switchable compartment is in the freezer mode. A diagram showing the heat flow when the first switchable compartment is in the freezing mode and the second switchable compartment is in the refrigeration mode. Enlarged view around the heat insulating partition wall (30) in Fig. 2 Enlarged view around heat insulating partition wall (29) in Fig. 2 Enlarged front view of the heat insulating partition wall (29) A diagram showing another embodiment of the heat insulating partition wall (29) that provides the effects of the present invention.

Hereinafter, a form (this embodiment) for carrying out the present invention will be described. However, the present embodiment is not limited to the following content, and can be arbitrarily changed within the scope of the present invention.
(First embodiment)
FIG. 1 is a front view showing the refrigerator according to the first embodiment. FIG. In the following description, the six-door refrigerator 1 will be described as an example, but the refrigerator is not limited to six doors.

As shown in FIG. 1, the heat insulating box body 10 of the refrigerator 1 is stored in the order of the refrigerating chamber 2 from the top, the ice making chamber 3 and the freezing chamber 4 arranged on the left and right, the first switching chamber 5, and the second switching chamber 6. have a room. The refrigerator 1 is provided with doors for opening and closing the openings of the respective storage compartments. These doors are divided into right and left rotary refrigerator compartment doors 2a and 2b for opening and closing the opening of the refrigerator compartment 2, ice making compartment 3, freezer compartment 4, first switching compartment 5 and second switching compartment 6. They are a drawer-type icemaker door 3a, a freezer compartment door 4a, a first switchable compartment door 5a, and a second switchable compartment door 6a that open and close openings, respectively.

The refrigerator compartment door 2a is provided with a display section 19 that indicates typical settings and conditions inside the refrigerator. Door hinges (not shown) are provided at the top and bottom of the refrigerator compartment 2 to fix the refrigerator compartment doors 2a, 2b to the refrigerator 1. As shown in FIG.

The refrigerating compartment 2 is a refrigerating storage compartment in which the interior is set to a refrigerating temperature range (0° C. or higher), for example, about 4° C. on average. The ice making compartment 3 and the freezing compartment 4 are freezing storage compartments in which the interior is set to a freezing temperature range (below 0°C), for example, about -20°C on average.

The first switchable compartment 5 and the second switchable compartment 6 are switchable storage compartments that can set the inside of the refrigerator to a freezing temperature range or a refrigerating temperature range. It can be switched to a freezing mode at about 20°C. In the refrigerator 1 of the present embodiment, a strong refrigerating mode and a weak freezing mode in which the temperature is between the refrigerating mode and the freezing mode, a strong freezing mode in which the temperature is lower than the freezing mode, and a refrigerating temperature range for storing vegetables. A plurality of operating modes are provided, such as a suitable vegetable mode, which can be selected by the user via the control panel 18 (see FIG. 2). Note that when the refrigerator 1 is connected to a smartphone or the like via a wireless communication line, the user may set the temperature range of the switchable storage compartment via the smartphone or the like.

FIG. 2 is a cross-sectional view of the refrigerator according to the first embodiment, taken along the line II-II in FIG.

As shown in FIG. 2, the refrigerator 1 includes a heat insulating box body 10 formed by filling a foam heat insulating material (for example, urethane foam) between an outer box 10a (made of steel plate) and an inner box 10b (made of synthetic resin). Therefore, the outside and the inside of the refrigerator are separated from each other. In addition to the foam insulation material, the heat insulation box body 10 is provided with a vacuum insulation material 25 having a lower thermal conductivity than the foam insulation material between the outer box 10a and the inner box 10b, thereby reducing the food storage volume. It enhances the insulation performance without Here, the vacuum heat insulating material is configured by wrapping a core material such as glass wool or urethane with an outer wrapping material. The outer wrapping material includes a metal layer (eg, aluminum) to ensure gas barrier properties. Also, depending on the settings, the first switchable compartment 5 and the second switchable compartment 6 become relatively large freezer storage compartments, so the door 5a of the first switchable compartment 5 and the door 6a of the second switchable compartment 6, and the heat insulating box body 10 A vacuum heat insulating material 25 is also inserted in the lower part of the housing in order to improve the heat insulating performance.

The refrigerator compartment 2 is separated from the ice making compartment 3 and the freezer compartment 4 by a heat insulating partition wall 28 . The ice making compartment 3 and the freezing compartment 4 are separated from the first switching compartment 5 by a heat insulating partition wall 30 . The first switchable chamber 5 and the second switchable chamber 6 are separated by a heat insulating partition wall 29 . A vacuum heat insulating material 25 is inserted inside the heat insulating partition walls 29 and 30 to ensure high heat insulating performance with a relatively thin heat insulating wall. In addition, on the front side between the ice making compartment 3 and the freezing compartment 4, there is provided a wall to prevent the air inside the refrigerator 1 from leaking out from the gaps between the doors 3a and 4a and to prevent the outside air from entering the storage compartments. A heat insulating partition wall 30c is provided. In this embodiment, an electric heater 46a for heating the first switchable chamber 5 is provided above the heat insulating partition wall 29 so that the first switchable chamber 5 and the second switchable chamber 6 do not become excessively low temperature. An electric heater 46 b for heating the second switching chamber 6 is provided below the wall 29 .

The ice making compartment 3, the freezing compartment 4, the first switching compartment 5, and the second switching compartment 6 are provided with an ice making compartment container 3b (see FIG. 4) that can be pulled out integrally with the doors 3a, 4a, 5a, and 6a, respectively. A container 4b, a first switchable chamber container 5b, and a second switchable chamber container 6b are provided.

The refrigerator 1 includes a first cooler 14 a that cools the ice making compartment 3 , the freezer compartment 4 , the first switchable compartment 5 , and the second switchable compartment 6 . The first cooler 14 a is provided in a first cooler chamber 8 a provided substantially behind the first switchable chamber 5 and the second switchable chamber 6 . In the first cooler chamber 8a, the upstream side of the air flow of the first cooler 14a is called the first cooler chamber 8a1, and the downstream side of the air flow of the first cooler 14a is called the first cooler chamber 8a2. There is A first fan 9a, which is a cooling fan, is provided above the first cooler 14a. The first switchable chamber 5 and the second switchable chamber 6 and the first cooler chamber 8a are composed of a partition member 20a forming a wall surface on the side of the storage chamber (the first switchable chamber 5 and the second switchable chamber 6), and a first cooler It is partitioned by a partition member 20b that constitutes the chamber 8a side. The partition member 20a and the partition member 20b partition the first cooler chamber 8a and each storage chamber, and in combination with the inner box 10b and the first cooler toy 23a, constitute the air passage space of the first cooler 14a. Therefore, the partition member 20a and the partition member 20b are collectively referred to as the air passage constituent member 20. As shown in FIG. The partition member 20a is made of, for example, polypropylene, which is a type of resin member, and has a thickness of 1.5 mm. The partition member 20b (foamed heat insulating material) is made of, for example, foamed polystyrene foam (expanded polystyrene). In addition, the thickness of the partition member 20b depends on the moldability when foaming, the assembling property when incorporating the refrigerator, the impact resistance, and the heat transfer to the first switchable chamber 5 and the second switchable chamber 6 by the first cooler chamber 8a. In order to suppress the influence, it is set to 30 mm. In addition, since the front of the first fan 9a is a storage room (switching storage room) that is also in the refrigeration temperature zone, it is necessary to insulate it from the first cooler room 8a, etc., and the air path is complicated. Therefore, the first fan 9a is a centrifugal fan that is resistant to static pressure.

A defrosting heater 21 (see FIG. 2) for heating the first cooler 14a is provided in the lower portion of the first cooler chamber 8a. The defrosting heater 21 is, for example, an electric heater of 50 W to 200 W, which is the heater with the highest heating value in the refrigerator 1, and is a radiant heater of 120 W in this embodiment. Defrosted water (melted water) generated during defrosting of the first cooler 14a drops into the first cooler trough 23a (see FIG. 2) provided in the lower part of the first cooler chamber 8a, and It is discharged to an evaporating plate 32 (see FIG. 2) provided above the compressor 24 (see FIG. 2) through a drain port 22a (see FIG. 2) and a first cooler drain pipe 27a (see FIG. 2).

The second cooler 14b, which is a cooler for cold storage compartment, is provided in a second cooler compartment 8b, which is a cooler compartment for cold storage provided substantially at the back of the cold storage compartment 2. As shown in FIG. The air that has been heat-exchanged with the second cooler 14b and has a low temperature is sent through the refrigerator compartment air passage 11 and the refrigerator compartment outlet 11a by the second fan 9b, which is a cooling fan provided above the second cooler 14b. Air is blown into the refrigerator compartment 2 via the air, and the inside of the refrigerator compartment 2 is cooled. The air blown into the refrigerator compartment 2 returns to the second cooler compartment 8b through the refrigerator compartment return port 15 and is cooled again by the second cooler 14b.

The second cooler 14b circulates the air in the refrigerating compartment 2 and performs defrosting by off-cycle defrosting using the heat of the refrigerating compartment 2 . The defrosted water generated during the defrosting of the second cooler 14b drops into the second cooler trough 23b (see FIG. 2) provided in the lower part of the second cooler chamber 8b, and the second cooler drain port ( not shown), and is discharged to the evaporating dish 32 provided in the machine room 39 via a second cooler drain pipe (not shown).

Refrigerator compartment temperature sensor 41, freezer compartment temperature sensor 42, first switchable compartment temperature sensor 43, second A switching chamber temperature sensor 44 (both see FIG. 3A) is provided, a first cooler temperature sensor 40a is provided above the first cooler 14a, and a second cooler temperature sensor 40b is provided above the second cooler 14b. These sensors detect the temperatures of the refrigerator compartment 2, the freezer compartment 4, the first switchable compartment 5, the second switchable compartment 6, the second cooler 14b, and the first cooler 14a. Further, inside the door hinge cover 16 on the ceiling of the refrigerator 1, an outside air temperature sensor 37 for detecting the temperature of the outside air (outside air) and an outside air humidity sensor 38 for detecting the humidity are provided. Other sensors include a door sensor 45 (see FIG. 3A) that detects the open/closed states of the doors 2a, 2b, 3a, 4a, 5a, and 6a, and an ice making sensor that detects the temperature of water (ice) in the ice tray 3, which will be described later. A room temperature sensor (not shown) and the like are also provided.

A control board (control device, control unit) 31 (see FIG. 2) is arranged on the upper part of the refrigerator 1, and includes a CPU, a memory such as a ROM and a RAM, an interface circuit, etc., which are part of the control device. The control board 31 includes an outside air temperature sensor 37, an outside air humidity sensor 38, a refrigerator compartment temperature sensor 41, a freezer compartment temperature sensor 42, a first switchable compartment temperature sensor 43, a second switchable compartment temperature sensor 44, and a first cooler temperature sensor 40a. , the second cooler temperature sensor 40b, the door sensor 45, and the like by electrical wiring (not shown).

In addition, the control board 31 controls the compressor 24, the first fan 9a, the second fan 9b, and the damper 100, which will be described later, based on the output values of each sensor, the settings of the operation unit 18, the programs prerecorded in the ROM, and the like. , 101a, 101b, 102a and 102b.

In addition, the refrigerator 1 of this embodiment is provided with a communication board (not shown) that can be connected to an external device. By providing this communication board, the information of the refrigerator 1 can be provided to a mobile device such as a smartphone, a personal computer, or the like. I am making it possible.

3A and 3B are front views showing the configuration of air passages of the refrigerator according to the first embodiment, and FIG. 3B shows the inside of the air passages. Doors 3a, 4a, 5a and 6a and containers 3b, 4b, 5b and 6b are omitted. FIG. 4 is a schematic diagram showing an air passage configuration of the refrigerator according to the first embodiment.

Cool air blowing to each of the storage compartments 3, 4, 5 and 6 is controlled by dampers 100, 101a, 101b, 102a and 102b, which are air blow control units.

When cooling the ice making compartment 3 and the freezing compartment 4, the damper 100 for controlling air blowing to the ice making compartment 3 and the freezing compartment 4 is opened, and the first cooling fan 9a provided above the first cooler 14a is turned on. As a result, air (cold air) that has become low temperature by exchanging heat with the first cooler 14a is sent through the first cooler chamber 8a2, the air passage 12, the freezer compartment damper 100, the air passage 110, and the freezer compartment outlets 110a and 110b. The air is sent to the ice making chamber 3 and the freezing chamber 4 to cool the water in the ice tray 3c of the ice making chamber 3, the ice in the container 3b, the food in the container 4b of the freezing chamber 4, and the like. The water in the ice tray 3c is supplied by an ice making pump (not shown) from the ice making tank 37 shown in FIG. 3B. The air that has cooled the ice making compartment 3 and the freezing compartment 4 returns to the first cooler compartment 8a1 through the return air passage 12d from the return port 110c and is cooled again by the first cooler 14a. Since both the ice making chamber 3 and the freezing chamber 4 are always storage chambers in the freezing temperature range, cost reduction is achieved by adopting a structure in which one damper controls airflow to the two storage chambers.

The first switchable compartment 5 changes the blowing of cool air between the freezing mode and the refrigerating mode. Note that the vegetable mode described above will be described as part of the refrigeration mode. When the first switchable chamber 5 is in the freezing mode, the damper 101a that is the direct cooling damper of the first switchable chamber 5 is opened, and the indirect cooling damper 101b is closed. The air cooled by the first cooler 14a passes through the first cooler chamber 8a2, the first fan 9a, the air passage 12, the damper 101a, and the discharge port 111a, which is the direct cooling discharge port of the first switching chamber 5. Then, the air is blown into the first switchable chamber container 5b provided in the first switchable chamber 5, and the food in the first switchable chamber container 5b is cooled. Since the cold air directly cools the food in the first switchable-chamber container 5b, the food in the first switchable-chamber container 5b can be cooled in a relatively short time. When the first switchable chamber 5 is in the refrigerating mode, the damper 101a is closed and the damper 101b, which is an indirect cooling damper of the first switchable chamber 5, is opened. The air cooled by the first cooler 14a passes through the first cooler chamber 8a2, the first fan 9a, the air passage 12, the damper 101b, and the discharge port 111b, which is the discharge port for indirect cooling of the first switching chamber 5. Then, the air is blown toward the outside (periphery) of the first switching chamber container 5b. The cold air is less likely to reach the food in the first switchable compartment container 5b directly, that is, the food is indirectly cooled via the first switchable compartment container 5b, so the food can be cooled while preventing it from drying out. The air discharged from the discharge port 111a or the discharge port 111b and cooled in the first switching chamber 5 returns to the first cooler chamber 8a1 through the return air passage 12d from the return port 111c and returns to the first cooler 14a. cooled by

In addition, since the temperature difference between the storage compartment and the outside air is larger in the freezing mode, and the load required for cooling is larger, the damper 101a mainly used in the freezing mode is used more than the damper 101b mainly used in the refrigerating mode. The opening area is increased to increase the air volume, while the opening area (size) of the damper 101b is decreased to maximize the internal volume of the storage chamber.

As with the first switchable chamber 5, the second switchable chamber 6 also changes the opening and closing of the damper depending on the operation mode. When the second switchable chamber 6 is in the freezing mode, the damper 102a that is the direct cooling damper of the second switchable chamber 6 is opened, and the indirect cooling damper 102b is closed. The air (cold air) cooled by the first cooler 14a passes through the first fan 9a, the air passage 12, the damper 102a, and the discharge port 112a, which is the discharge port for direct cooling of the second switchable chamber 6, to the second Air is blown into the switchable compartment container 6b to cool the food on the second switchable compartment container 6b. Since the cold air directly cools the food in the second switchable compartment container 6b , the food in the second switchable compartment container 6b can be cooled in a relatively short time. When the second switchable compartment 6 is in the refrigerating mode, the damper 102b, which is an indirect cooling damper for the first switchable compartment 5, is opened and the damper 102a is closed. The air cooled by the first cooler 14a passes through the first cooler chamber 8a2, the first fan 9a, the air passage 12, the damper 102b, and the discharge port 111b, which is the discharge port for indirect cooling of the second switching chamber 6. Then, air is blown to the outside (periphery) of the second switchable chamber container 6b, and as indirect cooling, the food is cooled while suppressing drying. The air that has cooled the inside of the second switching chamber 6 returns to the first cooler chamber 8a1 through the return port 112c and is cooled again by the first cooler 14a.

As with the dampers 101a and 101b, the damper 102a mainly used in the freezing mode has a larger opening area than the damper 102b mainly used in the refrigerating mode.

Here, in this embodiment, in addition to the normal refrigerating mode, a vegetable mode is provided assuming use as a vegetable compartment as a refrigerating mode for controlling the first switchable compartment 5 and the second switchable compartment 6 to the refrigerating temperature range. ing. In the normal refrigeration mode (when the vegetable mode is not set), when the temperature inside the refrigerator is higher than a predetermined value (for example, when it is higher than the reference temperature by 10°C or more), the dampers 101a and 102a, which are dampers for direct cooling, are opened. I'm trying As a result, the food in the container can be cooled in a short period of time by direct cooling, the time during which the food is at a high temperature can be suppressed, and the ability to maintain the freshness of the food can be improved. On the other hand, in the vegetable mode, the dampers 101a and 102a, which are basically direct cooling dampers, are not opened so that the food is cooled only by indirect cooling, and the food is cooled only by the dampers 101b and 102b, which are the indirect cooling dampers. to improve the freshness retention performance of food (vegetables). In the refrigeration mode (when the vegetable mode is not set), it is assumed that food in bags, beverages in cans and PET bottles, etc., which are relatively less likely to dry out, will be stored at low temperatures in a short period of time. To do this, basically the dampers 101a and 102a may be opened.

Also in the freezing mode, if the temperature inside the refrigerator is higher than a predetermined value (for example, higher than the reference temperature by 10° C. or more), the dampers 101a and 102a as well as the dampers 101b and 102b are opened at the same time. As a result, the air volume can be increased, and the cooling volume can be further increased.

FIG. 5 is a configuration diagram showing a refrigerating cycle of the refrigerator according to the first embodiment.

As shown in FIG. 5, the refrigerator 1 includes a compressor 24 that compresses the refrigerant, an outside radiator 50a that is a heat dissipation pipe that dissipates the refrigerant that has become high pressure and high temperature by the compressor 24, a wall heat dissipation pipe 50b, and a dew condensation prevention pipe. 50c, a freezing capillary tube 53a and a refrigerating capillary tube 53b, which are decompression means for decompressing the refrigerant, and a first cooler 14a and a second cooling device for heat exchange between the refrigerant and air in the refrigerator to absorb heat in the refrigerator. and a vessel 14b. The dew condensation prevention pipe 50c radiates heat to the front surfaces of the heat insulating partition walls 28, 29, and 30 (see FIGS. 1 and 2) to heat the front surfaces and suppress dew condensation.

The refrigerator 1 also includes a dryer 51 for removing moisture in the refrigerating cycle, gas-liquid separators 54a and 54b for preventing the liquid refrigerant from flowing into the compressor 24, a three-way valve 52 for controlling the refrigerant flow path, and a check valve. It has a valve 56 and a refrigerant junction 55 connecting the refrigerant flows. A refrigeration cycle is configured by connecting these with refrigerant pipes.

The refrigerator 1 uses 80 g of isobutane, which is a combustible refrigerant, as a refrigerant. Also, the compressor 24 can be provided with an inverter to change the rotation speed. The three-way valve 52 has two outflow ports 52a and 52b, and is a member capable of switching between a freezing operation in which the refrigerant flows through the outflow port 52a and a refrigerating operation in which the refrigerant flows through the outflow port 52b. The three-way valve 52 also has a fully closed mode in which the refrigerant does not flow through the outlet 52a and the outlet 52b, and a fully open mode in which the refrigerant flows. It is possible.

Moreover, the refrigerant of the refrigerator 1 flows as follows. That is, the refrigerant discharged from the compressor 24 flows through the outside radiator 50 a , the wall heat radiation pipe 50 b , the dew condensation prevention pipe 50 c , the dryer 51 in this order, and reaches the three-way valve 52 . An outflow port 52a of the three-way valve 52 is connected to a freezing capillary tube 53a through a refrigerant pipe. An outflow port 52b of the three-way valve 52 is connected to a refrigerating capillary tube 53b via a refrigerant pipe.

When the three-way valve 52 is configured to allow the refrigerant to flow toward the outflow port 52a, the refrigerant flowing out of the outflow port 52a passes through the freezing capillary tube 53a, the first cooler 14a, the gas-liquid separator 54a, the check valve 56, and the refrigerant. After flowing in order of the confluence portion 55 , it returns to the compressor 24 . The check valve 56 is arranged so that the refrigerant flows from the gas-liquid separator 54a to the refrigerant junction 55 side and does not flow from the refrigerant junction 55 to the gas-liquid separator 54b side. The refrigerant that has become low-pressure and low-temperature in the freezing capillary tube 53a flows through the first cooler 14a, and the first cooler 14a becomes low-temperature, and the air in the first cooler chamber 8a (see FIGS. 2, 3B, and 4) can be cooled. By blowing this air to the ice making compartment 3, the freezing compartment 4, the first switching compartment 5, and the second switching compartment 6, the ice making compartment 3, the freezing compartment 4, the first switching compartment 5, and the second switching compartment 6 are Cooling.

When the three-way valve 52 is configured so that the refrigerant flows toward the outflow port 52b, the refrigerant flowing out of the outflow port 52b passes through the refrigerating capillary tube 53b, the second cooler 14b, the gas-liquid separator 54b, and the refrigerant junction 55 in this order. After flowing, it returns to the compressor 24 . The refrigerant that has become low-pressure and low-temperature in the refrigerating capillary tube 53b flows through the second cooler 14b, whereby the temperature of the second cooler 14b becomes low and the air in the second cooler chamber 8b (see FIG. 2) can be cooled. . By blowing this air to the refrigerator compartment 2, the refrigerator compartment 2 is cooled.

FIG. 6 is a diagram showing the arrangement positions of the wall heat radiation pipe 50b and the dew condensation prevention pipe 50c. As shown in FIG. 5, the wall heat radiation pipe 50b and the dew condensation prevention pipe 50c are members through which high-temperature and high-pressure refrigerant flows. The wall heat radiation pipe 50b (dotted line in FIG. 6) is arranged between the outer casing 10a and the inner casing 10b (see FIG. 2) so as to be in contact with the outer surface of the outer casing 10a. The outer case 10a is made of steel plate, and the high-temperature refrigerant in the wall heat radiation pipe 50b radiates heat to the air outside the refrigerator 1 through the outer surface of the outer case 10a. Also, the dew condensation prevention pipe 50c (one-dot chain line in FIG. 6) is arranged in front of the heat insulating partition wall 28, the heat insulating partition wall 29, the heat insulating partition wall 30, and the heat insulating partition wall 30c. As shown in FIGS. 1 and 2, the front portions of the heat-insulating partition walls 28, 29, 30, and 30c are the ice making compartment 3, the freezing compartment 4, and the first switching compartment that can be set to the freezing temperature zone. 5. The edge of the opening of the second switching chamber 6 is formed, and the edge of the opening is heated by the dew condensation prevention pipe 50c so that dew condensation does not occur on the edge of the opening due to cooling by these storage chambers.

Here, in the refrigerator 1 of the present embodiment, both the first switchable compartment 5 and the second switchable compartment 6 are switchable compartments that can be set to the refrigerating temperature range and the freezing temperature range. It is difficult to achieve the refrigerating temperature range, and it is more difficult for the second switchable compartment 6 to maintain the freezing temperature range. The reason for this will be explained with reference to FIGS. 7 and 8. FIG.

FIG. 7 shows the heat flow when the first switchable compartment 5 is in the refrigerating mode and the second switchable compartment 6 is in the freezing mode, and FIG. is. The arrows indicate the heat transfer from the high temperature side to the low temperature side with respect to the first freezing compartment 5 and the second switching compartment 6, and the heat transfer between the freezing temperature storage compartment and the outside air, which has a particularly large temperature difference, is indicated by a thick arrow. there is Note that heat transfer between chambers with a small temperature difference (10° C. or less) is omitted because it has little effect.

Heat transfer from the outside air to the first switchable chamber 5 and the second switchable chamber 6 occurs in any of the modes shown in FIGS. In the switching chamber 6, heat is transferred from the outside air through the front surface (door 6a), the lower surface (the bottom surface of the heat insulating box 10), and the lower rear surface (the place facing the machine room 39 through the heat insulating box 10). invades. Although not shown, heat from the outside air also enters from the left and right side surfaces.

In addition, when the first switchable chamber 5 shown in FIG. wall 30), the lower surface (insulating partition wall 29), and the back surface (air passage component 20) through the ice making chamber 3 and the freezing chamber 4, the second switching chamber 6, the first cooler 14a and its surrounding space (first heat transfer (cooling) to the cooler chamber 8a, etc.) occurs. That is, the first switching chamber 5 is cooled from the upper surface, the lower surface, and the rear surface.

When the first switchable chamber 5 shown in FIG. 8 is set to the freezing mode and the second switchable chamber 6 is set to the refrigerating mode, in addition to heat transfer from the outside air, the lower surface (insulating partition wall 30) of the first switchable chamber 5 heat transfer occurs from the second switchable chamber 6 side of the refrigerating temperature zone via the , thereby heating the first switchable chamber 5 . In addition, in addition to heat transfer (heating) from the outside air to the second switchable chamber 6, heat transfer (cooling) to the first switchable chamber 5 in the freezing temperature zone via the upper surface (insulating partition wall 30) and Heat transfer (cooling) occurs through the top to the first cooler 14a and its surrounding space.

When comparing the heat transfer between the wall surfaces of the first switchable chamber 5 in FIG. 7 and the second switchable chamber 6 in FIG. It is cooled and heated from the front and sides, whereas the second switching chamber 6 of FIG. 8 is cooled from the top and upper back and heated from the front, sides, bottom and lower back. Compared to the second switchable chamber 6 in FIG. 8, the first switchable chamber 5 in FIG. 7 has a smaller wall surface area to be heated and a larger wall surface area to be cooled. temperature is likely to be lower. In the case of the refrigeration temperature range, the food may deteriorate due to freezing or the like if the temperature becomes too low, so heating with the electric heater 46a, for example, may be required, which may lead to an increase in power consumption.

Also, comparing the heat transfer between the walls of the second switchable chamber 6 of FIG. 7 and the first switchable chamber 5 of FIG. 6, the front and side surfaces of which are heated by heat exchange with the outside air, while the upper surface of the second switchable chamber 6 in FIG. , the lower part of the back surface is heated by heat exchange with the outside air. That is, the second switchable chamber 6 in FIG. 7 tends to receive more heat through the wall surface, especially the amount of heat from outside air with a large temperature difference, and the second switchable chamber 6 in FIG. 7 maintains a lower temperature. The amount of cooling required to do so tends to increase.

In addition, comparing the amount of heat transferred from the outside air to the first switchable chamber 5 and the second switchable chamber 6 in FIGS. heat transfer occurs through the front, sides, bottom, and bottom back. Since the amount of heat transfer through the wall surface increases due to the temperature difference, when the second switchable chamber 6 having a large wall surface area where heat transfer occurs is at a low temperature, that is, the second switchable chamber 6 is set to the freezing mode in FIG. However, the amount of heat transfer tends to increase, and the amount of heat entering from the outside air tends to increase. Therefore, the amount of cooling required to maintain the temperature inside the refrigerator, that is, the amount of power consumed by the compressor 24 is lower when the first switchable compartment 5 is in the refrigeration mode and the second switchable compartment 6 is in the freezing mode in FIG. , the first switchable compartment 5 in FIG. 8 tends to be in the freezing mode and the second switchable compartment 6 in the refrigerating mode.

From the above, although both are switchable compartments, the first switchable compartment 5 requires consideration to realize the refrigeration temperature range, that is, consideration to prevent the temperature from becoming too low while suppressing the heating of the electric heater 46a. , the second switching chamber 6 requires consideration for maintaining the freezing temperature zone (low temperature).

FIG. 9A is an enlarged view of FIG. 2 and an enlarged view around the heat insulating partition wall 30. FIG.

The refrigerator 1 includes a heat insulating partition member 30a that mainly constitutes the opening edge of the heat insulating box body 10 on the front side (doors 4a, 5a side) of the heat insulating partition wall 30, the ice making chamber 3, the freezing chamber 4, and the first switching chamber 5. A heat insulating partition wall 30 is composed of two members of a heat insulating partition member 30b that partitions the space. It should be noted that the present invention described below does not necessarily have to be divided into two members.

The outer surface of the heat insulating partition member 30a is composed of a steel plate partition cover 203 on the front side and a resin member 202 on the other side. Inside the heat-insulating partition member 30a, near the partition cover 203 on the front side, a dew condensation prevention pipe 50c through which the refrigerant that has become high temperature and high pressure in the compressor 24 flows is provided. Although the partition cover 203 of the refrigerator 1 according to the present embodiment is made of steel plate, it is not limited to this, and may be made of a material such as metal having high thermal conductivity. A heat insulating member 201 made of, for example, foam-molded polystyrene foam (expanded polystyrene) is provided inside the heat insulating partition member 30a except for the dew condensation prevention pipe 50c.

Since the insulating partition wall 30 is adjacent to the ice making chamber 3, the freezing chamber 4, and the first switching chamber 5, which are maintained in the freezing temperature range or can be set, the insulating partition wall 30 is positioned between the ice making chamber 3 and the freezing chamber. 4 and the low-temperature air in the first switching chamber 5 . Therefore, if the heat-insulating partition wall 30 is not equipped with a heating means, the surface temperature of the partition cover 203 forming the edge of the opening becomes lower than the outside air, and if the outside air around the refrigerator 1 is humid, the temperature drops below the dew point temperature. There is That is, if no heating means is provided, moisture in the air near the partition cover 203 may cause dew condensation on the surface of the partition cover 203 . On the other hand, as shown in FIG. 5, a dew condensation prevention pipe 50c through which a high-temperature refrigerant before being decompressed by the capillary tubes 53a and 53b is provided near the partition cover 203 forming the opening edge. By heating with the refrigerant, dew condensation that occurs on the partition cover 203 is suppressed. On the other hand, a heat insulating member 201 is provided substantially behind the dew condensation prevention pipe 50c so that the heat of the condensation prevention pipe 50c through which the high-temperature refrigerant flows does not enter the refrigerator and heat the storage compartment in the freezing temperature zone in particular. In addition, the heat insulating member 201 also contributes to suppression of heat transfer between the ice making compartment 3 and the freezing compartment 4 and the first switching compartment 5 .

FIG. 9B is an enlarged view of FIG. 2 similar to FIG. 9A and an enlarged view of the heat insulating partition wall 29 and its surroundings. As with the heat-insulating partition wall 30, the heat-insulating partition wall 29 is composed of a heat-insulating partition member 29a that mainly constitutes the opening edge of the heat-insulating box body 10, and a heat-insulating partition member 29b that partitions the first switching chamber 5 and the second switching chamber 6. Consisting of two members, the dew condensation prevention pipe 50c provided inside the heat insulating partition member 29a heats the steel plate partition cover 203 forming the opening edge to suppress dew condensation on the partition cover 203. Similarly, the heat insulating member 201 is provided in the space inside the heat insulating partition member 29a except for the dew condensation prevention pipe 50c.

Here, in the refrigerator 1 of the present embodiment, as described with reference to FIGS. 7 and 8, the first switchable compartment 5 is a storage compartment that can be set in the refrigerating temperature range, and when set to the refrigerating temperature range, the temperature Since it is a storage room in which the temperature tends to decrease, the first switching chamber 5 is heated using the dew condensation prevention pipe 50c. Specifically, on the surface of the heat insulating member 201, a heat conducting member 200 that conducts heat from substantially the rear surface of the dew condensation prevention pipe 50c to the first switching chamber 5 side (the lower portion of the heat insulating partition member 30a and the upper portion of the heat insulating partition member 29a) is provided. are provided. By conducting heat from the dew condensation prevention pipe 50c to the first switchable chamber 5 side by the heat conduction member 200, the heat of the dew condensation prevention pipe 50c can be used as a heating means for the first switchable chamber 5, and the first switchable chamber 5 can be heated. The amount of heating by the electric heater 46a for maintaining the temperature in the refrigerating temperature range, that is, the power consumption of the electric heater 46a can be reduced, thereby improving the energy saving performance. In addition, since the number of heating means is increased, the maximum amount of electric power and heating range required for the electric heater 46a can be reduced compared to the case where the heat conducting member 200 is not used, and the cost of the electric heater 46a can be reduced. In this embodiment, an aluminum tape, which is a metal tape (a metal member provided with an adhesive portion) with a thickness of 0.1 mm, is used as the heat conduction member 200, and the material has high thermal conductivity. The installability to the heat insulating member 201 is improved.

As described above, in the present embodiment, by providing the heat conduction member 200 inside the heat insulating partition member 30a, the dew condensation prevention pipe 50c, which is a heat radiation pipe, can be used as a heating means for the first switching chamber 5, and energy saving performance can be achieved. can be improved and the cost of the electric heater 46a can be reduced. As a means for heating the inside of the first switching chamber 5 by the heat radiation pipe, it is possible to extend the heat radiation pipe and provide the heat radiation pipe on the wall surface of the first switchable chamber 5, but in this case, the extension of the refrigerant pipe reduces the cost. increase and an increase in the amount of suitable refrigerant occurs. That is, the present invention using the heat-conducting member 200 can provide a refrigerator that suppresses an increase in cost and amount of refrigerant compared to the case where the refrigerant pipe is extended to heat the storage compartment.

In addition, in the present embodiment, the first switchable chamber 5 is heated by the condensation prevention pipe 50c, so that the refrigerant in the condensation prevention pipe 50c is cooled by heat exchange between the first switchable chamber 5 and the condensation prevention pipe 50c. Therefore, the effect of improving the efficiency of the refrigerating cycle can be obtained by increasing the amount of heat released by the refrigerant.

Here, by making the lower portion of the heat conducting member 200 longer than the upper portion of the heat insulating partition member 30a and shorter than the lower portion of the heat insulating partition member 29a, compared to the ice making chamber 3, the freezing chamber 4, and the second switching chamber 6, Heat from the dew condensation prevention pipe 50c is easily transmitted to the first switchable chamber 5, and the heating of the first switchable chamber 5 can be accelerated. The member 200 is not provided above the heat insulating partition member 30a (on the side of the ice making chamber 3 and the freezing chamber 4) and below the heat insulating partition member 29a (second switching chamber 6). That is, for the ice making chamber 3 and the freezing chamber 4 in the freezing temperature zone, which always require a low temperature, and the second switching chamber 6, which requires consideration for maintaining the low temperature as shown in FIGS. 7 and 8, It is configured to easily maintain a low temperature by suppressing heating by the dew condensation prevention pipe 50c, and is configured to easily conduct heat to the first switching chamber 5, which should be suppressed from being overcooled. In particular, as in the present embodiment, by not providing the heat conducting member 200 above the heat insulating partition member 30a and below the heat insulating partition member 29a, even if the heat conducting member 200 is provided, the first switching chamber 5 is excluded. Intrusion of heat through the dew condensation prevention pipe 50c into the storage compartment in the freezing temperature range can be suppressed, and the temperature inside the storage can be efficiently maintained.

In this embodiment, the heat conducting member 200 is provided on both the heat insulating partition member 29a and the heat insulating partition member 30a, but either one of them is effective. Depending on the required amount of heating, it is possible to select whether the heat conducting member 200 is provided on both the heat insulating partition member 29a and the heat insulating partition member 30a, or on either one of them. If the heat conducting member 200 is provided in either one, it is more effective to provide it in the heat insulating partition member 29a on the lower side of the first switching chamber 5. As shown in FIG. In the storage compartment that tends to be low temperature, cold air is blown for a short time, and the temperature distribution due to natural convection tends to lower the temperature in the lower part than in the upper part. By doing so, it is possible to efficiently suppress excessive cooling of food.

Moreover, the heating method using the dew condensation prevention pipe 50c using the heat conducting member 200 is effective in any form of refrigerator as a means for heating the storage compartment in the refrigerating temperature range. It is particularly effective in refrigerators in which storage compartments for freezing temperature zones (ice making compartment 3, freezer compartment 4, and second freezing mode switching compartment 6) are arranged above and below the storage compartment (first switching compartment 5 for refrigerating mode). is. As shown in FIG. 7, the refrigerating temperature zone storage compartments provided above and below the freezing temperature zone storage compartments tend to be at a low temperature, and the amount of heating by the electric heater 46a tends to increase. That is, it is effective in improving the energy saving performance to reduce the power consumption of the electric heater 46a by heating the storage compartment in the refrigerating temperature range by means of the dew condensation prevention pipe 50c through the heat conducting member 200. FIG. In addition, if the storage compartment in the refrigeration temperature zone is a cellar room with a higher temperature than the refrigeration compartment, or if it is a storage compartment that is supposed to store vegetables as in the vegetable mode of this embodiment, The effect of the present invention is more important because it is necessary to consider overcooling.

In addition to the invention described above, in the present embodiment, the first switchable chamber door 5a has a lower heat insulation performance than the second switchable chamber door 6a as a consideration for making it difficult for the first switchable chamber 5 to reach a low temperature. ing. Specifically, compared to the vacuum heat insulating material 25 provided on the second switching chamber door 6a, the vacuum heat insulating material 25 provided on the first switching chamber door 5a is made thinner, and the first switching chamber door 6a is thicker than the second switching chamber door 6a. Heating from outside air through the door 5a is increased. That is, while preventing heat from entering the second switchable chamber 6, for which consideration is important for maintaining the freezing temperature range (low temperature), the first switchable chamber 5, which tends to be at a low temperature, is protected from the outside air. is used to suppress the heating amount of the electric heater 46a, thereby improving the energy saving performance. In addition, by thinning the vacuum heat insulating material 25 of the first switching chamber door 5a, the amount of the vacuum heat insulating material 25 used can be reduced, resulting in a cost reduction effect. This effect can also be obtained by not providing the vacuum heat insulating material 25 in the first switching chamber 5 or by shortening the width and height of the vacuum heat insulating material 25 . However, since the first switchable chamber door 5a is cooled by the first switchable chamber 5, if the heat insulation performance of the first switchable chamber door 5a is excessively lowered, the surface of the first switchable chamber door 5a becomes low temperature, Condensation may occur on the one switching chamber door 5a. Especially when the first switchable chamber 5 is a switchable chamber as in this embodiment, the cooling amount of the first switchable chamber 5 is large when the first switchable chamber 5 is set to the freezing mode, and the surface of the first switchable chamber door 5a Since the temperature tends to be low, the range in which the heat insulating performance can be reduced is limited. Moreover, the efficiency improvement effect of the refrigerating cycle obtained by heating using the dew condensation prevention piping 50c mentioned above cannot be obtained by the heating by the outside air. Therefore, it is effective to use together with heating using the dew condensation prevention pipe 50c.

Further, in the present embodiment, dew condensation on the partition cover 203 is taken into consideration. FIG. 10 is an enlarged front view of the heat insulating partition member 29a and its surroundings. A portion where the heat conducting member 200 is attached inside the heat insulating partition member 29a is indicated by a broken line, and a portion where the door sensor 45 is provided is indicated by a dotted line. In this embodiment, a door sensor 45 for detecting opening/closing of the second switching chamber door 6a is provided inside the heat insulating partition member 29a. The door sensor 45 is a magnetic sensor that detects opening and closing of the second switching chamber door 6a in response to a magnet provided on the second switching chamber door 6a. As described above, the partition cover 203 is basically made of steel plate, but the front surface of the door sensor 45 uses a resin partition cover 203a to prevent erroneous detection by the magnetic sensor. Since resin has a lower thermal conductivity than steel plate, it is difficult to heat by the dew condensation prevention pipe 50a (see FIG. 9B) inside the heat insulating partition member 29a. is prone to low temperatures. For this reason, heat exchange via the heat conducting member 200 prevents the first switching chamber 5, which is at a lower temperature than the outside air, from cooling down to below the dew point. The heat conducting member 200 is not provided, and the heat conducting member 200 is provided on the rear side of the steel plate partition cover 203 which is easily heated by the dew condensation prevention pipe 50a and is difficult to be cooled. Similarly, the heat insulating partition member 30a is provided with a resin partition cover 203a in front of the door sensor 45, and the heat transfer member 200 is provided on the rear side of the steel plate partition cover 203. As shown in FIG.

Here, for example, the above-described effect can be obtained even with the configuration as shown in FIG. 11 . FIG. 11 is a diagram showing another embodiment of the heat insulating partition wall 29. As shown in FIG. The example of FIG. 11 utilizes a steel plate partition cover, and the partition cover 203b is a flange portion (from the opening edge to the inside of the chamber) above the partition cover 203 (first switching chamber 5 side) shown in FIG. 9B. bent portion) is longer, that is, the steel plate area on the side of the first switching chamber 5 (upper portion) is made larger than that on the side of the second switching chamber 6 (lower portion). Thereby, the heat of the dew condensation prevention pipe 50c can be transferred to the first switchable chamber 5 via the flange portion of the partition cover 203b, and the first switchable chamber 5 can be heated. A similar configuration can be obtained by providing a heat-conducting member for extending heat from the partition cover 203 to the upper portion of the heat-insulating partition member 29a. That is, the heat of the dew condensation prevention pipe 50c may be transferred to the first switchable chamber 5 via the partition cover 203 and the heat conducting member to heat the first switchable chamber 5 .

However, compared with the present embodiment shown in FIG. 9B, the configuration of FIG. 11 has a higher degree of difficulty in suppressing dew condensation on the partition cover 203b. Since the upper surface of the steel plate partition cover 203b is cooled by the first switching chamber 5, the upper part of the front surface of the partition cover 203b that forms the opening edge tends to be low temperature, so the first switching chamber is excessively cooled. It is necessary to design the flange length so as not to exchange heat with 5. In particular, as in the present embodiment, when the storage chamber to be heated is a switchable chamber that can be set even in the freezing temperature range, the upper surface of the partition cover 203b tends to become low in temperature when the freezing temperature range is set to a lower temperature range, and the temperature of the partition cover 203b increases. Heat exchange between the cover 203b and the first switching chamber 5 must be suppressed to the extent that dew condensation does not occur, assuming a freezing temperature range. On the other hand, in the present embodiment shown in FIG. 9B, the upper portion of the heat transfer member 200 is cooled by heat exchange with the first switching chamber 5, but basically the partition cover 203 exchanges heat with the front side of the dew condensation prevention pipe 50a. However, the heat conducting member 200 exchanges heat with the rear side of the dew condensation prevention pipe 50a, and the upper portion of the low temperature heat conducting member 200 and the partition cover 203 are thermally separated. The thermal effect on 203 is small. The refrigerant flowing through the dew condensation prevention pipe 50a is basically a gas-liquid two-layer refrigerant, and the temperature of the refrigerant basically does not change even if the dew condensation prevention pipe 50a is cooled. Therefore, even if the back surface of the dew condensation prevention pipe 50a is cooled through the heat conducting member 200, the temperature of the dew condensation prevention pipe 50a is less lowered, and the heat amount of the partition cover 203 is less affected by the dew condensation prevention pipe 50c. That is, the present embodiment shown in FIG. 9B requires less consideration for dew condensation on the partition cover 203, and has a configuration that makes it easier to heat the first switching chamber 5 using the dew condensation prevention pipe 50a. In a refrigerator having switchable compartments that can be set even in a freezing temperature range in which the amount of cooling from the first switchable compartment 5 is large, the form shown in FIG. 9B using the heat conducting member 200 is more effective. On the other hand, by adopting the form shown in FIG. 11, it is possible to suppress an increase in the number of members and the number of operations in manufacturing, which are caused by disposing the heat-conducting member 200, as compared with the present embodiment.

In addition, in the present embodiment, the heat of the dew condensation prevention pipe 50c is used to heat the first switching chamber 5. For example, the heat is transferred from the outer case 10a to the left and right wall surfaces (inner case 10b) of the storage chamber to be heated. A heat conducting member may be provided as follows. That is, the same effect can be obtained by heating the left and right wall surfaces of the first switching chamber 5 using the heat of the wall surface heat radiation pipe 50b and the dew condensation prevention pipe 50c near the opening edge on the front side shown in FIG. However, since the insulation box body 10 is formed by filling the space between the outer box 10a and the inner box 10b with a foamed insulating material, the airtightness of the outer box 10a and the inner box 10b is important. It is difficult to provide, and the heat of the dew condensation prevention pipe 50c is used in this embodiment because of manufacturability. In addition, since it is more efficient to heat the lower part of the storage chamber as described above, it is particularly effective to provide the heat conducting member 200 in the heat insulating partition member 29a.

In addition, the present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations. Moreover, it is possible to add, delete, or replace a part of the configuration of the embodiment described above with another configuration. For example, in the refrigerator of this embodiment, switchable compartments (first switchable compartment 5 and second switchable compartment 6) are provided. The first switching chamber 5 and the second switching chamber 6 of the freezing mode may be replaced with the freezing chamber. Moreover, the freezer compartment 4 may be a switching compartment. In addition, although an example having a plurality of coolers (the first cooler 14a and the second cooler 14b) has been described, the configuration may be such that one cooler cools all the storage compartments. .

Reference Signs List 1 refrigerator 2 refrigerating chamber 3 ice making chamber 4 freezing chamber 5 first switching chamber (first storage chamber)
5a First switching room door (first door)
5c first switchable chamber container 6 second switchable chamber (second storage chamber)
6a First switching room door (second door)
6c second switchable chamber container (switchable chamber container)
8a 1st cooler room 8b 2nd cooler room 9a 1st fan 9b 2nd fan 14a 1st cooler 14b 2nd cooler 14c Communication suppressing member 20 Air duct component 21 Defrost heater 24 Compressor 25 Vacuum insulation material 31 control board (control unit)
40a First cooler temperature sensor 40b Second cooler temperature sensor 41 Cold storage temperature sensor 42 Freezer temperature sensor 43 First switching compartment temperature sensor 44 Second switching compartment temperature sensor 50a Outside radiator 50b Wall heat radiation pipe (heat radiation pipe )
50c Condensation prevention piping (heat radiation piping)
52 Three-way valve 53a Freezing capillary tube (decompression means)
53b Capillary tube for refrigeration (decompression means)
100 freezer compartment damper 101a first switching compartment damper (for freezing mode)
101b First switching chamber damper (for refrigeration mode)
102a second switching chamber damper (for freezing mode)
102b second switching chamber damper (for refrigeration mode)
200 heat conducting member 201 heat insulating member 202 resin member 203 partition cover

Claims (6)

a first storage compartment that has an opening in front and can be set to a refrigerating temperature zone;
a partition wall separating the first storage chamber and the second storage chamber;
a partition cover disposed on the edge of the opening on the front surface of the partition wall;
a compressor;
a heat radiation pipe through which the refrigerant discharged from the compressor flows and a part of which is arranged on the back side of the partition cover,
The second storage chamber is arranged on the opposite side of the partition wall from the first storage chamber, has an opening in front, and can be set to a freezing temperature zone,
As a part of the partition cover, each of the first storage chamber side and the second storage chamber side has a flange portion that folds back from the edge of the opening to the back side,
The length of the flange portion on the side of the first storage compartment is longer than the length on the side of the second storage compartment. 2. The refrigerator according to claim 1 , wherein said flange portion is made of metal. The partition cover is composed of a member with low thermal conductivity and a member with high thermal conductivity,
3. The refrigerator according to claim 1, wherein the flange portion is provided on the rear surface of the member having high thermal conductivity. 4. The refrigerator according to any one of claims 1 to 3 , wherein the portion on which the flange portion is arranged includes a lower edge of the opening of the first storage compartment. 5. The refrigerator according to any one of claims 1 to 4 , wherein said first storage compartment is a storage compartment intended for storing vegetables. a second door substantially abuttable against the edge of the opening of the second storage compartment and comprising a vacuum insulation material;
a first door that is substantially abuttable against the edge of the opening of the first storage chamber and that does not have a vacuum insulation material or has a vacuum insulation material that is thinner than the vacuum insulation material of the second door; 6. A refrigerator according to any one of claims 1 to 5 .

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