JPWO2018033966A1 - refrigerator - Google Patents

Abstract

The refrigerator is set in a refrigeration temperature zone, and stores a refrigerated room for storing an object to be cooled, a supercooled cold storage room that is provided in the refrigerated room and keeps the cooled object at a supercooling temperature that is equal to or lower than a freezing temperature, and a lower part of the refrigerated room A vegetable room adjacent to the supercooled cool room and having a higher set temperature than the refrigerator room, a boundary wall provided between the vegetable room and the supercooled cool room, and a boundary wall below the supercooled cool room And a heater that heats an object to be cooled in the supercooled cold insulation chamber.

Description

  The present invention relates to a refrigerator capable of supercooled storage.

  Conventionally, a refrigerator having a plurality of temperature zone chambers has been proposed due to the growing need for storing foods at an optimum temperature (see Patent Documents 1 and 2). According to the refrigerators of Patent Documents 1 and 2, the amount of cold air is set individually for the upper and lower cryogenic containers in the refrigerator compartment, and different temperatures are set for the air in the upper and lower cryogenic containers. Can be set. In addition, a refrigerator in which a heater for controlling temperature is embedded in a boundary wall has been proposed in order to perform supercooled storage (see Patent Document 3).

JP 2001-330361 A Japanese Patent No. 3571549 Japanese Patent No. 5847235

  In the refrigerators described in Patent Documents 1 and 2, it is described that cooling is performed by flowing cold air into a two-stage low-temperature container in the refrigeration chamber, but this alone causes a large temperature fluctuation of the air between the containers, Since there is no heating step, supercooled storage may not be possible.

  In addition, in the refrigerator described in Patent Document 3, since there is a freezing room below the supercooled cold room, a heater embedded in the boundary wall so that the supercooled cold room is not cooled too much by heat transfer. Is configured to cover the entire case. For this reason, the amount of power consumption increases, the heater cost may increase, and the heater heat may not be used efficiently.

  The present invention has been made in order to solve the above-described problems, and in realizing supercooled storage of an object to be cooled, the energization rate and size of the heater can be suppressed, and the supercooled storage can be efficiently performed. The refrigerator which can perform is provided.

  The refrigerator of the present invention is set in a refrigeration temperature zone, a refrigeration room for storing an object to be cooled, a supercooled cold insulation room provided in the refrigeration room for keeping the object to be cooled at a supercooling temperature below a freezing temperature, A vegetable room adjacent to the supercooled cold room, which has a higher set temperature than the refrigerator room, a boundary wall provided between the vegetable room and the supercooled cold room, and below the supercooled cold room And a heater that heats an object to be cooled in the supercooled cold insulation chamber.

  According to the refrigerator of the present invention, the supercooled cool room is not cooled by heat transfer from the vegetable room by arranging the vegetable room having a higher set temperature than the refrigerating room adjacent to the supercooled cool room. Therefore, it is not affected by temperature unlike the prior art in which the freezer compartment is adjacent to the supercooled cold room. As a result, the supercooled cold-reserving chamber is not cooled too much, and the energization rate and size of the heater used for the supercooled storage can be suppressed, and the supercooled storage can be performed efficiently.

It is a front view of the refrigerator which concerns on Embodiment 1 of this invention. It is AA sectional drawing in FIG. 1 of the refrigerator which concerns on Embodiment 1 of this invention. It is BB sectional drawing in FIG. 1 of the refrigerator which concerns on Embodiment 1 of this invention. It is the E section enlarged view in FIG. 3 of the refrigerator which concerns on Embodiment 1 of this invention. It is CC sectional drawing in FIG. It is the F section enlarged view in FIG. It is the G section enlarged view in FIG. It is DD sectional drawing in FIG.

  Hereinafter, the refrigerator 1 which concerns on embodiment of this invention is demonstrated in detail using drawing. In the following drawings, the size relationship of each component may be different from the actual one. In the following drawings, the same reference numerals denote the same or corresponding parts, and this is common throughout the entire specification. Furthermore, the forms of the constituent elements shown in the entire specification are merely examples, and are not limited to these descriptions.

Embodiment 1 FIG.
FIG. 1 is a front view of a refrigerator according to Embodiment 1 of the present invention. In FIG. 1, the door of the refrigerator compartment 2 is not shown in order to explain the internal structure of the refrigerator compartment 2. 2 is a cross-sectional view of the refrigerator according to Embodiment 1 of the present invention, taken along line AA in FIG. 3 is a cross-sectional view of the refrigerator according to Embodiment 1 of the present invention, taken along line BB in FIG. With reference to FIGS. 1-3, the schematic structure of the refrigerator 1 is demonstrated. 1 to 3 indicates the width direction of the refrigerator 1, the Y axis indicates the depth direction of the refrigerator 1, and the Z axis indicates the height direction of the refrigerator 1. More specifically, the refrigerator 1 is described with the X1 side on the left side, the X2 side on the right side, the Y1 side on the front side, the Y2 side on the rear side, the Z2 side on the Z axis, and the Z2 side on the Z axis. To do. Moreover, the positional relationship (for example, vertical relationship etc.) between each structural member in a specification is a thing when installing the refrigerator 1 in the state which can be used in principle.

[Configuration of refrigerator 1]
The refrigerator 1 has a substantially rectangular parallelepiped casing 50 having a front surface (front) opened and a plurality of storage chambers formed therein. The housing 50 includes a steel outer box, a resin inner box, and a heat insulating material filled in a space between the outer box and the inner box. The storage space formed inside the housing 50 is partitioned by a plurality of partition members into a plurality of storage chambers in which an object to be cooled such as food is stored. As shown in FIG. 1, the refrigerator 1 is arranged as a plurality of storage rooms in a refrigerator compartment 2 arranged at the top, a vegetable compartment 3 arranged below the refrigerator compartment 2, and a vegetable compartment 3 below. The lowermost freezer compartment 4 is partitioned and provided. In addition, the kind and number of the storage rooms with which the refrigerator 1 is provided are not limited to these in the structure where a vegetable room is installed in the lower area | region of a refrigerator compartment. For example, the freezer compartment 4 may be provided divided into a plurality of rooms such as up and down or left and right.

  On the back side of the refrigerator 1, as shown in FIG. 2, as an example of cooling means for cooling each storage chamber, a compressor 30 that compresses and discharges refrigerant, a cooler 8 that functions as an evaporator, A blower fan 9 is provided for moving the cool air generated by the vessel 8. Further, the refrigerator 1 has a first air passage 10 that is an air passage through which cold air flows and in which a cooler 8 and a blower fan 9 are installed. The compressor 30 has a refrigerant discharge side connected to a condenser (not shown) and a refrigerant suction side connected to the cooler 8. The cooler 8 functions as an evaporator, and generates cold air by exchanging heat between the refrigerant flowing through the cooler 8 and the air in the first air passage 10. The blower fan 9 supplies cold air from the first air passage 10 to the refrigerator compartment 2, the vegetable compartment 3, and the freezer compartment 4. The first air passage 10 is provided vertically in the inner wall panel 17 of the housing 50 from the lower side to the upper side in the refrigerator 1. More specifically, the first air passage 10 is provided on the back side of the refrigerator compartment 2, the vegetable compartment 3, and the freezer compartment 4. The 1st air path 10 is divided | segmented into the 1st air path 10a which blows cold air to the 2nd storage container 5c, and the 1st air path 10b which ventilates cold air to the refrigerator compartment 2 and the 1st storage container 5b. . The first air passage 10a is provided with a damper 11a, and the first air passage 10b is provided with a damper 11b. The damper 11a and the damper 11b adjust the air volume of the cool air supplied to the second storage container 5c, the refrigerator compartment 2, and the first storage container 5b. The damper 11a and the damper 11b may be replaced with a twin damper. A cold air outlet 17a is formed in the inner wall panel 17 of the refrigerator compartment 2 as shown in FIG. The compressor 30 and the cooler 8 constitute a refrigeration cycle together with a condenser and expansion means (not shown). The cold air generated by the cooler 8 by the operation of the refrigeration cycle is blown by the blower fan 9 and supplied to the storage rooms such as the refrigerator compartment 2 and the freezer compartment 4 through the first air passage 10 on the back of the refrigerator 1. Is done. The cold air supplied to the refrigerator compartment 2 is returned to the cooler 8 through the second air passage 12 shown in FIG.

  The refrigerator 1 has a control device (not shown) that controls various devices. The temperature of each chamber is detected by a thermistor (not shown) installed in each chamber, and the dampers 11a installed in the first air passage 10a and the first air passage 10b are set so as to have a preset temperature. The controller 11 controls the opening degree of the damper 11b, the output of the compressor 30, the output of the heater 15, the amount of air blown by the blower fan 9, and the like.

(Refrigerator room 2)
The refrigerating room 2 is a storage room that is set to a refrigerating temperature zone (for example, about 3 to 5 ° C.) and stores a cooled object such as food. As shown in FIG. 2, the refrigerator compartment 2 is provided with a shelf 21 for storing food and the like. The opening formed in the front surface of the refrigerator compartment 2 is provided with a rotary (for example, open door) door 2c that opens and closes the opening. Of course, the door 2c of the refrigerator compartment 2 may not be a door-opening door but may be a single rotary door. The refrigerator compartment 2 is provided with an inner wall panel 17. The inner wall panel 17 is disposed at a position facing the door 2 c of the refrigerator compartment 2 and forms a rear wall in the refrigerator compartment 2. In addition, as shown in FIG.1 and FIG.2, the inside of the refrigerator compartment 2 is divided by the top plate 18, and the chilled chamber 5a is provided as one of the storage rooms in the downward direction in the refrigerator compartment 2. As shown in FIG. Details of the chilled chamber 5a will be described with reference to FIG.

  FIG. 4 is an enlarged view of part E in FIG. 3 of the refrigerator according to Embodiment 1 of the present invention. In the chilled chamber 5a, a first storage container 5b capable of maintaining a lower temperature than the refrigerator compartment 2 is disposed in the upper space, and a second storage container 5c capable of being supercooled and stored in the lower space. A plate 6 is provided to divide the upper space and the lower space. In other words, the top plate 18 is provided above the second storage container 5c, and the first storage container 5b is provided between the top plate 18 and the second storage container 5c.

  The first storage container 5b and the second storage container 5c are drawer-type containers that are movable in the front-rear direction along a rail (not shown) provided inside the side wall of the chilled chamber 5a. The rail may be on the bottom wall of the chilled chamber 5a and the partition plate 6, or may not be provided. As shown in FIG. 4, the first storage container 5 b is a substantially box-shaped member having an upper surface having a front wall 5 b 1, a side wall 5 b 2, and a rear wall 5 b 3. Is done. The second storage container 5c is also a substantially box-shaped member having an upper surface opened having a front wall 5c1, a side wall 5c2, and a rear wall 5c3, and food is taken in and out through the upper surface opening when pulled out. . As a material of the first storage container 5b and the second storage container 5c, for example, polystyrene or the like is used as in the case of a general refrigerator storage container, but is not limited thereto. In FIG. 1 to FIG. 4, the two storage containers, the first storage container 5b and the second storage container 5c, are arranged up and down, but may be arranged in the left-right width direction, for example. There may be one storage container.

  As shown in FIG. 4, the space in the 1st storage container 5b provided in the refrigerator compartment 2 is set to the temperature lower than the refrigerator compartment 2, and is set to the temperature higher than the 2nd storage container 5c, Similar to a chilled room of a general refrigerator, it is a cold room 5a1 set at about 0 ° C. For this reason, the 1st storage container 5b accommodates the thing which can maintain quality, for example, cheese, yoghurt, etc. by the cool preservation at about 0 degreeC. The space in the second storage container 5c provided in the refrigerator compartment 2 is kept at a lower temperature than the space in the first storage container 5b (for example, the supercooling temperature below the freezing point (freezing temperature) of the object to be cooled). This is a supercooled cold room 5a2. For this reason, in the second storage container 5c, what is desired to be kept in a supercooled state, for example, meat, fish, or a processed product thereof, is stored. The temperature adjustment of the cold insulation chamber 5a1 is performed by adjusting the air volume of the damper 11b, and the temperature adjustment of the supercooled cold insulation chamber 5a2 is performed by adjusting the air volume of the damper 11a and adjusting the output of the heater 15.

  The opening formed in the front surface of the upper space of the chilled chamber 5 a is provided with a door using a lid 13 that is pivotally fixed to the top plate 18. By pulling out the first storage container 5b, the lid 13 rotates and the door opens. A front wall 5c1 of the second storage container 5c provided with a pull handle is configured as a drawer-type door in an opening formed in the front surface of the lower space of the chilled chamber 5a. The configuration of the door of the chilled chamber 5a is arbitrary. For example, the lid 13 may be provided as a lower door, and the front wall 5b1 of the first storage container 5b may be configured as an upper door. On the other hand, as shown in FIG. 2, an air outlet 17b is formed in the inner wall panel 17 behind the first storage container 5b, and the upper space of the chilled chamber 5a is connected to the first air passage 10b. Similarly, an air outlet 17c is formed in the inner wall panel 17 behind the second storage container 5c, and the lower space of the chilled chamber 5a is connected to the first air passage 10a.

  As shown in FIG. 4, in the partition plate 6 provided between the first storage container 5b and the second storage container 5c, the chilled chamber suction through which the cold air of the first storage container 5b passes to the second storage container 5c side. A mouth 14 is formed. The chilled chamber suction port 14 is formed between the rear wall 5b3 of the first storage container 5b and the inner wall panel 17 of the refrigerator compartment 2. The chilled chamber suction port 14 is a through hole that communicates the upper space and the lower space in the chilled chamber 5a.

(Vegetable room 3)
2 and 3, the vegetable compartment 3 is provided below the refrigerator compartment 2 and is adjacent to the second storage container 5 c in the refrigerator compartment 2 via the boundary wall 7. In other words, the vegetable room 3 is adjacent to the supercooled cold room 5a2. The vegetable compartment 3 has a space for storing stored items, and is particularly suitable for refrigerated vegetables. The vegetable room 3 is a storage room in a refrigeration temperature zone (for example, about 3 to 7 ° C.) having a higher set temperature than the refrigeration room 2. The vegetable compartment 3 is provided with a drawer-type door 3c. Opening / closing between the vegetable compartment 3 and the outside of the refrigerator 1 is performed by opening and closing the door 3c.

(Boundary wall 7)
As shown in FIG. 2, the boundary wall 7 is provided between the vegetable compartment 3 and the second storage container 5c. In the configuration in which the vegetable compartment 3 is under the boundary wall 7, the second storage container 5c is not cooled by heat transfer. Therefore, the boundary wall 7 may not include a heat insulating material. As shown in FIG. 4, the boundary wall 7 is formed with a refrigerator compartment suction port 24 through which the cold air in the refrigerator compartment 2 is sucked. The refrigerator compartment suction port 24 is formed between the rear wall 5c3 of the second storage container 5c and the inner wall panel 17. The refrigerator compartment suction port 24 and the chilled chamber suction port 14 are at least partially overlapped in plan view. Moreover, the refrigerator compartment inlet 24 is connected to the 2nd air path 12, as shown in FIG.

(Heater 15)
As shown in FIG. 4, below the second storage container 5c, as a heating mechanism (heating means) that heats an object to be cooled such as food in the second storage container 5c, a heater 15 is a boundary wall. 7 is installed. The heater 15 is used for heating an object to be cooled, and is used for a heating process of supercooled storage. In supercooled storage, it is necessary to prevent the object to be cooled from being overcooled and frozen. Therefore, the heater 15 is used to heat the object to be cooled that has been overcooled. By installing the heater 15 below the second storage container 5c, the object to be cooled in the second storage container 5c can be efficiently heated.

(Freezer 4)
As shown in FIG. 2, the freezer compartment 4 is provided under the vegetable compartment 3 and has a space for storing stored items, and in particular, freezes the stored items. The freezer compartment 4 is a storage compartment set in a freezing temperature zone below 0 ° C. (for example, −18 ° C. or lower). This freezer compartment 4 is provided with a drawer-type door 4c. By opening and closing the door 4c, opening / closing between the freezer compartment 4 and the outside of the refrigerator 1 is performed.

[Maintaining supercooled state]
Here, the temperature environment in which the food in the second storage container 5c is maintained in a supercooled state will be described. In order for water to turn into ice, a place for ice crystals to grow is necessary, which is an ice nucleus at the small molecular level. In the supercooled liquid, it is considered that molecular aggregates and discretes are repeated due to fluctuations, and molecular aggregates (clusters) of various sizes are generated. When the clusters are very small, the inner molecules are in an ice-bound state, but the surface molecules cannot be bound and are unstable and some leave the cluster.

  As long as the cluster does not exceed a certain critical radius, it cannot exist stably and does not become an ice crystal, so even if it reaches below the freezing point, freezing does not start. This state is a supercooled state. If any cluster larger than the critical radius occurs, it becomes a nucleus and forms ice crystals, and the supercooled state is eliminated. When the temperature is lowered, the probability that the supercooled state is eliminated increases, and the disturbance in the liquid also increases due to a disturbance such as a physical impact, resulting in a cluster having a critical half or more, and the supercooled state is eliminated.

  In the case of food, since food is a mixture of substances, ice crystals are often produced using them as a core. When food is stored below the freezing point (for example, 0 ° C. or lower), the supercooled state may be released due to impact or some factor, and ice crystals may be generated in the food. If the supercooled state is left released, the food freezes, and the quality of the food deteriorates due to cell damage caused by freezing. Therefore, by controlling the low temperature process in which the set temperature in the refrigerator is set lower than the freezing point of the food and the temperature raising process in which the temperature is set higher than the freezing point, the temperature environment of the storage space is adjusted, and suddenly The food can be maintained in a supercooled state by cooling without giving a stimulus such as a temperature drop. Specifically, in maintaining the supercooled state, the “temperature range” of the second storage container 5c that performs supercooled storage is preferably in the range of −3 to −1 [° C.]. In maintaining the supercooled state, it is preferable to make the “temperature distribution” of the second storage container 5 c uniform.

[Cooling air flow]
Next, the flow of cold air generated by the cooler 8 will be described with reference to FIGS. 2 and 3. In the figure, the arrows indicate the flow of cold air. The cold air produced by the cooler 8 is divided into cold air that passes through the blower fan 9 and travels toward the refrigerator compartment 2 and the freezer compartment 4. The cold air toward the refrigerating chamber 2 passes through the first air passage 10, and is divided into cold air toward the refrigerating chamber 2, the first storage container 5b, and the second storage container 5c by the damper 11a and the damper 11b. And the cool air which goes to the refrigerator compartment 2 blows off to the refrigerator compartment 2 from the blower outlet 17a shown in FIG. The cold air blown out from the blower outlet 17a to the refrigerator compartment 2 passes over the shelf 21, descends from the top to the front in front of the refrigerator compartment 2, and moves toward the space 5d on the near side of the chilled chamber 5a shown in FIG.

  Moreover, the cold air | gas which goes to the 1st storage container 5b and the 2nd storage container 5c blows off to the 1st storage container 5b from the blower outlet 17b, and also blows off from the blower outlet 17c to the 2nd storage container 5c. As shown in FIG. 4, a part of the cold air blown out from the air outlet 17 b is chilled from the gap between the first storage container 5 b and the lid 13 or the gap between the lid 13 and the top plate 18. It escapes to the space 5d on the near side of the chamber 5a. Further, a part of the cold air that has exited from the air outlet 17c escapes from the gap between the second storage container 5c and the partition plate 6 into the space 5d on the near side of the chilled chamber 5a. The cold air that has escaped from the first storage container 5b and the second storage container 5c into the space 5d on the near side of the chilled chamber 5a merges with the cold air that has flowed downward in the refrigerator compartment 2, and is below the second storage container 5c. And flows out from the refrigerator compartment suction port 24 to the second air passage 12 shown in FIG.

  Moreover, the cold air blown out from the blower outlet 17b and the blower outlet 17c is bounced back to the lid 13 and the front wall 5c1 of the second storage container 5c, respectively, as shown in FIG. Therefore, the cold air bounced back in the first storage container 5b passes through the chilled chamber suction port 14, which is a through hole formed in the partition plate 6, and merged with the cold air bounced back in the second storage container 5c. Then, it flows out from the refrigerator compartment inlet 24 to the second air passage 12. As shown in FIG. 3, the cold air flowing through the second air passage 12 passes through the rear of the vegetable compartment 3 and returns to the cooler 8. At this time, cold air does not have to flow into the vegetable compartment 3.

  As described above, the supercooled cool room 5a2 can be cooled by heat transfer from the vegetable room 3 by arranging the vegetable room 3 having a higher set temperature than the refrigerating room 2 adjacent to the supercooled cool room 5a2. In addition, there is no temperature influence as in the prior art in which the freezer compartment is adjacent to the supercooled cold storage compartment. As a result, the supercooled cold-reserving chamber 5a2 is not cooled too much, and the heating capability of the heater 15 used for precooling storage of the object to be cooled in the supercooled cold-reserving chamber 5a2 can be reduced. As a result, the energization rate of the heater 15 can be reduced, and the size of the heater 15 can be reduced, so that it is possible to efficiently perform overcooling storage.

  Further, most of the cold air in the first storage container 5 b flows out to the second air passage 12 through the chilled chamber suction port 14 and the refrigeration chamber suction port 24 opened to the rear of the partition plate 6. By providing the chilled chamber suction port 14, the amount of cold air passing through the space 5e between the second storage container 5c and the boundary wall 7 can be reduced. Further, since the chilled chamber suction port 14 and the refrigeration chamber suction port 24 overlap in plan view, it becomes easier for the cool air to flow into the second air passage 12, and the amount of cool air passing through the space 5e can be reduced. Since the amount of cool air passing through the space 5e is reduced, the heat of the heater 15 is not easily taken away by the cool air passing through the space 5e, so that the temperature raising capability of the heater 15 can be reduced. As a result, the energization rate of the heater 15 can be reduced, and the size of the heater 15 can be reduced, so that it is possible to efficiently perform overcooling storage.

  In the configuration in which the vegetable room 3 is adjacent to the supercooled cold room 5a2, the supercooled cold room 5a2 is not cooled by heat transfer. Therefore, the boundary wall 7 does not need to include a heat insulating material for preventing heat transfer to the supercooled cold room 5a2, and the cost can be reduced.

  Furthermore, since the temperature of the boundary wall 7 does not fall below the temperature of the second storage container 5c, there is no possibility that water freezes. Moreover, it is not necessary to consider the heat insulation performance of the boundary wall 7, and since it is the boundary wall 7 which does not have a heat insulating material, the thickness of the boundary wall 7 can be made thin locally. Due to these structural characteristics, a water supply tank 19 for making ice can be disposed in the boundary wall 7 as shown in FIG. 4, for example. Thus, the water supply tank which has been conventionally arranged beside the chilled chamber 5a can be moved into the boundary wall 7, and the width (X axis) of the first storage container 5b and the second storage container 5c is set to the refrigerator compartment 2. The full width in the cabinet (X axis) can be set. As a result, the storage amount of the first storage container 5b and the second storage container 5c can be increased.

  Moreover, in the structure which made the width | variety of the 1st storage container 5b and the 2nd storage container 5c into the full width in the store | warehouse | chamber of the refrigerator compartment 2, compared with the structure in case it is not full width in the store | warehouse | chamber, the blower outlet 17b and the blower outlet 17c are relative. In particular, the first storage container 5b and the second storage container 5c can be located at the center. Therefore, cold air can be evenly flowed into the first storage container 5b and the second storage container 5c. As a result, in the second storage container 5c, variation in the temperature distribution can be suppressed, so that the supercooled storage can be efficiently performed.

Embodiment 2. FIG.
5 is a cross-sectional view taken along the line CC in FIG. The refrigerator which concerns on Embodiment 2 of this invention is demonstrated using FIG. Parts having the same configuration as those of the refrigerators of FIGS. 1 to 4 are denoted by the same reference numerals and description thereof is omitted. In the refrigerator 1 </ b> A according to Embodiment 2 of the present invention, ribs 16 are provided in the boundary wall 7. The rib 16 is a side wall surrounding the heater 15 and is formed higher than the height of the heater 15. In FIG. 5, since the shape of the heater 15 is formed in a rectangular shape in plan view, the rib 16 is similarly provided in a rectangular shape in plan view. However, the rib 16 may have a shape that surrounds the heater 15, and may be provided in various shapes according to the shape of the heater 15.

  As described above, in the refrigerator 1A according to the second embodiment of the present invention, the rib 16 surrounding the heater 15 in the boundary wall 7 and higher than the height of the heater 15 is provided. Therefore, even if cold air flows around the heater 15, the cold air does not directly hit the heater 15 because it is blocked by the ribs 16. As a result, the heat loss of the heater 15 can be reduced, and the heat of the heater 15 can be prevented from being used in places other than where it is necessary. Further, since warm air is directed upward from cold air, the presence of the rib 16 lowers the energization rate of the heater 15 by confining the heat of the heater 15 in the rib 16 of the boundary wall 7 and effectively using the heat during heat generation. In addition, the size of the heater 15 can be reduced. Therefore, for example, it is not necessary to provide the heater 15 on the entire boundary wall 7, and the heater 15 may be disposed only immediately below the second storage container 5 c.

Embodiment 3 FIG.
FIG. 6 is an enlarged view of a portion F in FIG. The refrigerator which concerns on Embodiment 3 of this invention is demonstrated using FIG. Parts having the same configuration as those of the refrigerators of FIGS. 1 to 5 are denoted by the same reference numerals and description thereof is omitted. In the refrigerator 1B according to Embodiment 3 of the present invention, the upper edge of the air outlet 17c is in contact with the lower surface of the partition plate 6. Thereby, since the cold air flowing into the chilled chamber 5a from the blower outlet 17c flows along the partition plate 6 due to the Coanda effect, the cold air can be distributed in the second storage container 5c, and variation in temperature distribution is suppressed. Can do. As a result, supercooled storage can be performed over a wide range in the second storage container 5c.

Embodiment 4 FIG.
FIG. 7 is an enlarged view of a portion G in FIG. 8 is a cross-sectional view taken along the line DD in FIG. A refrigerator according to Embodiment 4 of the present invention will be described with reference to FIGS. 7 and 8. Parts having the same configuration as those of the refrigerators of FIGS. 1 to 6 are denoted by the same reference numerals and description thereof is omitted. The refrigerator 1C according to Embodiment 4 of the present invention further includes a thermistor 20 that detects the temperature of the second storage container 5c, and the thermistor 20 is interposed between the rear wall 5c3 and the inner wall panel 17 of the second storage container 5c. is set up. The temperature adjustment in the second storage container 5c is performed by adjusting the output of the heater 15 and the air volume of the cool air of the damper 11a, which are lower than the lower edge of the outlet 17c and equal to or greater than the rear wall 5c3 of the second storage container 5c. It is controlled based on the temperature detected by the thermistor 20 installed at a height of.

  In supercooled storage, it is desirable to measure the temperature as close to food as possible. However, the temperature of food does not fluctuate as rapidly as room temperature, but fluctuates gently with respect to changes in room temperature. For this reason, if the thermistor 20 is placed in a place where it is easily exposed to cold air, the difference between the food temperature and the temperature measured by the thermistor 20 becomes large, which is not suitable for supercooled storage. Therefore, the thermistor 20 is not disposed between the air outlet 17 c and the refrigerator compartment inlet 24 so that the cold air is hard to hit, and the outlet 17 c is formed between the installation position of the thermistor 20 and the refrigerator compartment inlet 24. It was set as the structure which is made. Since the air outlet 17c is arranged between the thermistor 20 and the refrigerator compartment suction port 24, the thermistor 20 is not directly exposed to cold air, and the temperature can be measured appropriately, and supercooled storage is realized. It becomes easy to do.

  In addition, embodiment of this invention is not limited to the said Embodiment 1-4. For example, if the thermistor 20 has a direction in which cold air is applied, a wall may be provided around a portion of the thermistor 20 so that the cold air is difficult to hit. Further, the heating means is not limited to the heater 15, and may be a heat exchanger or a Peltier element.

  1 Refrigerator, 1A Refrigerator, 1B Refrigerator, 1C Refrigerator, 2 Chiller, 2c Door, 3 Vegetables, 3c Door, 4 Freezer, 4c Door, 5a Chilled Room, 5a1 Cold Room, 5a2 Supercooled Room, 5b 1st Storage container, 5b1 front wall, 5b2 side wall, 5b3 rear wall, 5c Second storage container, 5c1 front wall, 5c2 side wall, 5c3 rear wall, 5d space, 5e space, 6 partition plate, 7 boundary wall, 8 cooler, 9 Blower fan, 10 first air passage, 10a first air passage, 10b first air passage, 11a damper, 11b damper, 12 second air passage, 13 lid, 14 chilled chamber suction port, 15 heater, 16 rib, 17 inner wall Panel, 17a Air outlet, 17b Air outlet, 17c Air outlet, 18 Top plate, 19 Water supply tank, 20 Thermistor, 21 Shelf, 24 Cold room inlet, 30 Compressor, 50 housing .

Claims (9)

A refrigerated room that is set in a refrigerated temperature zone and stores an object to be cooled;
A supercooled cold-reserving chamber that is provided in the refrigerator compartment and keeps the object to be cooled at a supercooling temperature below the freezing temperature;
A vegetable room provided below the refrigerator compartment, adjacent to the supercooled cold room, and having a higher set temperature than the refrigerator compartment;
A boundary wall provided between the vegetable room and the supercooled cold room;
A heater that is installed on the boundary wall below the supercooled cold chamber and heats an object to be cooled in the supercooled cold chamber;
Refrigerator equipped with. The refrigerator compartment is
A top plate provided above the supercooled cold room;
A cold storage chamber provided between the top plate and the supercooled cold storage chamber, having a lower set temperature than the cold storage chamber and having a higher set temperature than the supercooled cold storage chamber;
Have
A partition plate is provided between the supercooled cold room and the cold room,
The refrigerator according to claim 1, wherein the partition plate is formed with a chilled chamber suction port through which cool air in the cool chamber passes through the supercooled cool chamber.   The refrigerator wall suction port into which the cold air of the refrigerating room is sucked is formed in the boundary wall, and at least a part of the chilled room suction port and the refrigerating room suction port overlap in a plan view. Refrigerator. The cold storage chamber is composed of a box-shaped first storage container having an open top surface having a front wall, a side wall, and a rear wall, and
The supercooled cold room is composed of a box-shaped second storage container having an open top surface having a front wall, a side wall, and a rear wall,
The chilled chamber suction port is formed between a rear wall of the first storage container and an inner wall panel of the refrigerator compartment disposed at a position facing the door of the refrigerator compartment;
The refrigerator according to claim 3, wherein the refrigerator compartment suction port is formed between a rear wall of the second storage container and the inner wall panel.   The refrigerator according to any one of claims 1 to 4, wherein the boundary wall further accommodates a water supply tank for ice making.   The refrigerator according to any one of claims 1 to 5, wherein the boundary wall is provided with a side wall that surrounds the heater and is higher than a height of the heater. A cold air path provided in a vertical direction in the inner wall panel disposed at a position facing the door of the refrigerator compartment;
The inner wall panel is formed with a cold air outlet that leads from the air passage to the supercooled cold room,
The refrigerator according to any one of claims 2 to 6, wherein a lower surface of the partition plate is in contact with an upper edge of the air outlet. It further comprises a thermistor for detecting the temperature of the supercooled cold room,
The thermistor is installed between the rear wall of the second storage container and the inner wall panel, is lower than the lower edge of the air outlet, and is equal to or higher than the rear wall of the second storage container The refrigerator of Claim 7 installed in.   The refrigerator according to claim 8, wherein the outlet is formed between an installation position of the thermistor and the refrigerator compartment inlet.

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