JP2003161567A - Cooling storage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling storage that efficiently cools each of a freezing storage compartment internally maintained at a freezing temperature and a refrigerating storage compartment internally maintained at a refrigerating temperature in a single cooling storage. <P>SOLUTION: The cooling storage comprises: an insulated box 1 with a first storage compartment 4 and a second storage compartment 5 formed dividedly; an insulated door 8 for closing openings 2A and 3A of the storage compartments 4 and 5 in an openable relation; a first refrigerant circuit 20 comprising a compressor 21, a condenser 23, a capillary tube 27, an evaporator 6 and the like; a second refrigerant circuit 24 comprising a compressor 25, a condenser 26, a capillary tube 28, an evaporator 7 and the like; and a controller 36 for controlling operations of the refrigerant circuits 20 and 24 independently. The evaporator 6 of the first refrigerant circuit 20 cools the first storage compartment 4, and the evaporator 7 of the second refrigerant circuit cools the second storage compartment 7. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling storage compartment in which a plurality of storage chambers are formed in a heat insulating box and the storage chambers are cooled to different temperature zones.

[0002]

2. Description of the Related Art Conventionally, a cold storage for commercial use or household use has a storage chamber formed in a heat insulating box, a compressor,
A so-called refrigeration cycle equipped with a condenser, a decompression device, a cooler, and the like cools a storage chamber to a predetermined temperature. Usually, the cooling storage used is an independent cooling storage such as a freezer for cooling the storage chamber to a freezing temperature or a refrigerator for cooling the storage chamber to a cooling temperature. Further, a freezer / refrigerator in which these independent forms of freezer or refrigerator are integrated is also used as a commercial or domestic cooling storage.

In such a freezer / refrigerator, a refrigerant circuit is usually branched to a freezing side or a refrigeration side using the same compressor, and a refrigerating storage is made by using a cooling action of a cooler provided in each refrigerant circuit. The chamber and the refrigerating storage chamber form different temperature zones.

[0004]

However, when the same compressor is used to cool the respective storage chambers by the coolers on both the freezing side and the refrigerating side, the evaporation temperature of the other cooler, for example, on the refrigerating side. The cooler is affected by the state of the evaporation temperature of the cooler on the freezing side, one of the coolers, in such a case, the evaporation temperature of the cooler on the refrigeration side becomes insufficient, and it becomes difficult to cool to a predetermined temperature, There was a problem that the cooling efficiency decreased.

Further, even when only one storage chamber is used and the other storage chamber is not used, the refrigerant is evaporated by both the coolers, so that the compressor is operated more than necessary and the operation is performed. There was a problem of poor efficiency.

Therefore, the present invention has been made to solve the conventional technical problems, and in one cooling storage, a freezing storage chamber for maintaining the storage chamber at a freezing temperature,
An object of the present invention is to provide a refrigerating storage cabinet capable of efficiently cooling the refrigerating storage compartments each of which maintains the refrigerating temperature in the storage compartments.

[0007]

The cooling storage of the present invention comprises:
A heat-insulating box body in which first and second storage chambers are defined, a heat-insulating door that opens and closes the openings of the first and second storage chambers, a compressor, a condenser, a decompression device, an evaporator, and the like. A first refrigerant circuit composed of, a second refrigerant circuit composed of a compressor, a condenser, a pressure reducing device, an evaporator and the like, and a control means for independently controlling the operation of each refrigerant circuit, The evaporator of the first refrigerant circuit cools the first storage chamber, and the evaporator of the second refrigerant circuit cools the second storage chamber.

According to the cooling storage of the present invention, the heat-insulating box in which the first and second storage chambers are defined and formed, and the first and second storage chambers
Insulation door that opens and closes the opening of the storage chamber of the vehicle, a first refrigerant circuit including a compressor, a condenser, a pressure reducing device, an evaporator, and the like, a compressor, a condenser, a pressure reducing device, an evaporator, and the like. And a control means for independently controlling the operation of each refrigerant circuit, wherein the evaporator of the first refrigerant circuit cools the first storage chamber, and the second refrigerant circuit Since the second storage chamber is cooled by this evaporator, it is possible to prevent the operation of one refrigerant circuit from affecting the operation of the other refrigerant circuit, and to distribute the operation independently of the other refrigerant circuit. By the evaporator provided, the evaporation effect can be sufficiently exerted and the cooling efficiency can be improved.

According to the second aspect of the present invention, there is provided a cooling storage cabinet according to the first aspect.
In addition to the above invention, the control means independently controls power supply to each refrigerant circuit.

According to the invention of claim 2, in addition to the invention of claim 1, since the control means independently controls the power supply to each refrigerant circuit, the first storage chamber or the second storage chamber. When either one of the rooms is operated and the other is not operated, it is possible to avoid unnecessary cooling of the storage room and control power consumption by controlling the respective power supply. .

The cooling storage of the invention of claim 3 is the same as that of claim 1.
Alternatively, in addition to the invention of claim 2, a storage means for supplying power to the compressor of each refrigerant circuit is provided.

According to the invention of claim 3, in addition to the invention of claim 1 or 2, since the compressor of each refrigerant circuit is provided with a power storage means for supplying power respectively, in an environment where it is difficult to procure power. It will also be possible to use such a cold store. Further, even if the power supply is cut off for a certain period of time due to a power failure or the like, the compressors of the first refrigerant circuit and the second refrigerant circuit can be continuously operated, and the temperature in each storage chamber can be increased. Can be maintained at a constant temperature. Therefore, it becomes possible to avoid deterioration of the quality of the food or the like stored in the storage chamber.

According to a fourth aspect of the present invention, in addition to the first, second or third aspect of the present invention, in the first storage chamber, the first storage chamber is a machine room in which a compressor of each refrigerant circuit is installed. And the second storage chamber, the control means cools the first storage chamber to a refrigerating temperature and the second storage chamber to a freezing temperature.

According to the invention of claim 4, in addition to the invention of claim 1, claim 2 or claim 3, the first storage chamber is a machine room in which a compressor of each refrigerant circuit is installed. The control means is located between the second storage chambers, and the control means cools the first storage chamber to the refrigerating temperature and the second storage chamber to the freezing temperature, so that the machine room is heated to a high temperature by the operation of the compressor or the like. Then, the first storage chamber cooled to the refrigerating temperature and the second storage chamber cooled to the freezing temperature are arranged side by side in order, and the temperature difference between the respective chambers can be minimized. Therefore, it is possible to minimize the decrease in thermal efficiency due to the temperature difference.

According to a fifth aspect of the present invention, there is provided a cooling storage cabinet according to the fourth aspect.
In addition to the above invention, an inner door is provided inside the heat insulating door corresponding to the opening of the second storage chamber.

According to the invention of claim 5, in addition to the invention of claim 4, since the inner door is provided inside the heat insulating door in correspondence with the opening of the second storage chamber, the inside of the second storage chamber is provided. It becomes possible to further suppress the leakage of cold heat to the outside.

According to a sixth aspect of the present invention, there is provided a cooling storage cabinet according to the fourth aspect.
Alternatively, in addition to the invention of claim 5, the heat insulating wall of the heat insulating box located between the first storage chamber and the machine room is a heat insulating wall between the first and second storage chambers and the outside, and It is characterized in that it is thicker than the heat insulating wall between the first and second storage chambers.

According to the invention of claim 6, in addition to the invention of claim 4 or claim 5, the heat insulating wall of the heat insulating box located between the first storage chamber and the machine room is Since the thickness is made thicker than the heat insulation wall between the second storage room and the outside and the heat insulation wall between the first and second storage rooms, it is possible to make the cooling storage itself compact and to produce a machine room with a significant temperature difference. By maximizing the heat insulating wall between the first storage chambers, it is possible to remarkably suppress the infiltration heat due to the heat conduction from the machine room, and to stably cool the first storage chambers. Become.

According to the seventh aspect of the present invention, in addition to the fourth, fifth or sixth aspect of the present invention, there is provided a cooling storage cabinet comprising a heat insulating wall of a heat insulating box located between the first and second storage chambers. , It is characterized in that it is thinner than the heat insulation wall of other parts.

According to the invention of claim 7, in addition to the invention of claim 4, claim 5 or claim 6, the heat insulating wall of the heat insulating box located between the first and second storage chambers is Since it is thinner than the heat insulating wall of other parts, the heat insulating wall with the smallest temperature difference will be thinner than other parts, and the reduction of thermal efficiency will be minimized while making the cooling storage itself compact. Will be able to.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION A cooling storage R according to the present invention will be described below with reference to FIGS. 1 is a perspective view of the cooling storage R of the present invention, FIG. 2 is a plan view of the cooling storage R,
3 is a front view of the cooling storage R, FIG. 4 is a plan view of the cooling storage R with an inner door, FIG. 5 is a refrigerant circuit diagram of the cooling storage R,
FIG. 6 shows an electrical block diagram of the cooling storage R. The cooling storage R of the embodiment is, for example, a cooling storage used in a low-temperature article transportation system or a place where power cannot be continuously supplied at all times, for example, a cooling storage installed at a place where power cannot be supplied only during business hours. Or, it shall be a cooling storage installed in an environment where blackouts frequently occur.

The cooling storage R comprises a heat insulating box 1 having an opening on the upper surface thereof, and the heat insulating box 1 has an opening 2A on the upper surface thereof.
And the cooling tanks 2 and 3 that respectively form 3A are buried in order from the right, for example. A first storage chamber 4 and a second storage chamber 5 are formed in the cooling tanks 2 and 3, respectively.

Here, it is assumed that the first storage chamber 4 is a refrigerating storage chamber that is cooled and maintained at a refrigerating temperature, and the second storage chamber 5 is a freezing storage chamber that is cooled and maintained at a freezing temperature. I shall. Therefore, the cooling tanks 2 and 3 are respectively wound with refrigerant pipes constituting evaporators 6 and 7, which will be described in detail later, all over the outer circumferences, but the evaporation of the evaporator 6 wound around the cooling tank 2 is performed. The temperature is higher than the evaporation temperature of the evaporator 7 wound around the cooling tank 3. Further, in order to keep the inside of the refrigerating storage chamber 4 in the cooling tank 2 at a predetermined constant temperature, for example, it is turned on at + 7 ° C and turned off at + 3 ° C.
A thermostat 16 (only shown in FIG. 6) is provided. On the other hand, in order to keep the inside of the freezing storage chamber 5 at a predetermined constant temperature, the cooling tank 3 is provided with, for example, a thermostat 17 (only shown in FIG. 6) that is turned on at −18 ° C. and turned off at −22 ° C. .

On the upper surface of the heat insulating box body 1, a heat insulating door 8 for opening and closing the openings 2A and 3A is provided. For example, hinge members 9 and 9 provided at the rear end of the upper surface of the heat insulating box body 1 are mainly formed. It is pivotally supported as, and can be opened and closed so as to be rotatable upward. In addition, on the front surface of the heat insulating door 8, the door 8
It is assumed that a grip portion 10 for rotating the upper part is formed. In this embodiment, the door for opening and closing the upper opening 2A of the refrigerating storage chamber 4 and the door for opening and closing the upper opening 3A of the freezing storage chamber 5 are the same heat insulating door 8. However, in addition to this, the openings 2A and 3A may be opened and closed by separate heat insulating doors.

In addition, the upper opening 3A of the second storage chamber 5 is provided with an inner door 11 corresponding to the opening 3A and made of a heat insulating material having a thickness of, for example, about 30 mm. The inner door 11 may be rotatably provided by a hinge member (not shown) around the rear end, or may be a detachable lid-shaped member. In FIG. 4, reference numeral 12 is a handle member for opening the inner door 11.

Thus, even when the heat insulating door 8 is opened / closed in order to take in / out the articles in the refrigerating storage chamber 4, the cold heat in the freezing storage chamber 5 is prevented from leaking to the outside. Therefore, the cooling efficiency can be improved. Even when the heat insulating door is provided separately for the opening 2A of the refrigerating storage chamber 4 and the opening 3A of the freezing storage chamber 5 as described above, the upper surface of the freezing storage chamber 5 is provided by the inner door 11. It is possible to secure a sufficient distance between the opening 3A and the outside, and it is possible to further prevent leakage of cold heat.

On the other hand, a unit portion 15 is formed on the right side of the heat insulating box 1 in this embodiment, and a machine room (not shown) is formed in the unit portion 15. In the machine room, compressors 21 and 25 will be described in detail later.
It is assumed that cooling devices such as the condensers 23 and 26 are provided.

As a result, the cooling storage R is composed of a machine room, a refrigerating storage room 4, and a freezing storage room 5 in this order from the right, and the refrigerating storage room 4 includes a machine room and a freezing storage room 5. It will be located in between.

Therefore, the machine room which is heated to a high temperature by the operation of the compressors 21 and 25, the refrigerating storage chamber 4 which is cooled to the refrigerating temperature, and the freezing storage chamber 5 which is cooled to the freezing temperature are arranged in order. By arranging, the temperature difference between the chambers can be minimized, and the reduction in thermal efficiency due to the temperature difference can be minimized.

A cooling tank 2 which constitutes a refrigerating storage chamber 4
Of the heat insulating wall located between the cooling tank 2 and the cooling tank 3 forming the freezing storage chamber 5 has a thickness of, for example, 100 mm. The thickness is, for example, 50 mm, and the thickness of the heat insulating wall located between the cooling tank 3 and the outside is, for example, 70 mm. Furthermore, the thickness of the heat insulating wall located between the cooling tanks 2 and 3 and the outside in the front-rear direction is, for example, 70 mm,
The thickness of the heat insulating wall located between the bottom of each cooling tank 2 and 3 and the outside is at least 70 mm or more.
Further, the thickness of the heat insulating door 8 is, for example, 60 mm.

As a result, the heat insulating wall located between the refrigerating storage room 4 and the machine room is located between the storage room 4 and 5 and the outside and between the storage rooms 4 and 5. Since it is formed to be thicker than the thickness of the heat insulation wall, by maximizing the heat insulation wall between the machine room and the refrigerating storage room 4 in which a significant temperature difference occurs, the cooling storage R itself is made compact. Infiltration heat due to heat conduction from the machine room can be remarkably suppressed, and the refrigerating storage room 4 can be cooled stably.

Further, since the heat insulating wall located between the storage chambers 4 and 5 is formed thinner than the heat insulating walls of other parts, the heat insulating wall having the smallest temperature difference is made thinner than the other parts. The cooling storage R itself can be made compact and the reduction in thermal efficiency can be minimized. Further, the thickness of the heat insulating wall located between the storage chambers 4 and 5 is
Since the thickness of the heat insulation door 8 is thicker than 1/2 of the thickness of the heat insulation door 8, the refrigerating storage chamber 4 is affected by the temperature of the freezing storage chamber 5 and is cooled to a temperature lower than a predetermined temperature, especially at low outside air temperature. You will be able to avoid it.

In the machine room, a DC compressor 21 and a condenser 23, which together with the evaporator 6 for cooling the interior of the refrigerating storage room 4, constitute a first refrigerant circuit 20, are arranged. Similarly, in the machine room, a DC compressor 25 and a condenser 26 that together with the evaporator 7 that cools the inside of the freezing storage room 5 constitute a second refrigerant circuit 24 are arranged. Further, in this machine room, a condenser blower (not shown) for air-cooling each of the condensers 23 and 26 is provided.

Also, in the machine room, an outlet 31 is provided.
An AC / DC converter 32 for converting a commercial power supply supplied via the AC to DC, and a battery 33 as a storage means for storing a part of the current supplied from the AC / DC converter 33 are provided. ing.

Furthermore, a control panel 30 is provided on the front surface of the unit section 15, and each refrigerant circuit 2
ON / OFF for switching between 0 and 24 operation / stop
Switches 34 and 35 are provided respectively. Also,
It is assumed that a plurality of air intake / exhaust holes 40 for supplying and exhausting air into the machine chamber are provided on the upper surface and the front surface of the unit portion 15.

The first refrigerant circuit 20 is connected to the compressor 2
1, a condenser 23, a capillary tube 27 as a pressure reducing device, and an evaporator 6 are connected in an annular shape. The second refrigerant circuit 24 is configured by connecting the compressor 25, the condenser 26, the capillary tube 28 also serving as a pressure reducing device, and the evaporator 7 in an annular shape.

An electrical block diagram of the cooling storage R in this embodiment will be described with reference to FIG. An outlet 31 for supplying the commercial power is connected to an AC / DC converter 32, and when the commercial power is supplied, the commercial power is converted from AC to DC. And
The AC / DC converter 32 is connected to a control device 36 as a control means provided with the ON / OFF switches 34 and 35, and the AC / D converter 32
A battery 33 is connected between the C converter 32 and the control device 36 as the power storage means. Therefore, when the commercial power is supplied, the current converted into DC is the battery 3
The battery 33 is charged according to the charging state of No. 3.

The control device 36 includes the ON / OFF switch 3
4, 35 are provided in parallel, and each of the ON / OFF switches 34, 35 has the thermostat 1
6, 17 are connected. Further, the thermostats 16 and 17 respectively include a compressor 21 forming a first refrigerant circuit 20 and a compressor 25 forming a second refrigerant circuit 24.
Are connected.

In the cooling operation of the cooling storage R with the above configuration, first, the outlet 31 is connected to the commercial power source, and then the control panel 30 is turned on.
The ON / OFF switches 34 and 35 are turned ON. As a result, the compressors 21 and 25 forming the refrigerant circuits 20 and 24 are operated. When the compressor 21 forming the first refrigerant circuit 20 is operated, the high-temperature high-pressure refrigerant compressed by the compressor 21 is condensed in the condenser 23 and decompressed in the capillary tube 27, and then the evaporator. It flows into 6. The refrigerant is, for example, −5 ° C. to −15 ° C. in the evaporator 6.
After evaporating at the evaporating temperature of 1, the gas is returned to the compressor 21, and the evaporator 6 exerts a cooling function by the endothermic function at this time.
The refrigerating storage chamber 4 in the cooling tank 2 around which the evaporator 6 is wound.
The inside is a natural refrigeration temperature zone, for example + 3 ° C to +7
It is cooled to ℃.

On the other hand, when the compressor 25 constituting the second refrigerant circuit 24 is operated, the high temperature and high pressure refrigerant compressed by the compressor 25 is condensed in the condenser 26 and decompressed in the capillary tube 28. After that, it flows into the evaporator 7. The refrigerant is, for example, −35 ° C. to −40 in the evaporator 7.
After evaporating at an evaporation temperature of ℃, it returns to the compressor 25,
The evaporator 7 exerts a cooling action by the heat absorbing action at this time. The inside of the freezing storage chamber 5 in the cooling tank 3 around which the evaporator 7 is wound has a freezing temperature zone of, for example, -18 ° C by natural circulation.
To -22 ° C.

As a result, the first refrigerant circuit 20 and the second refrigerant circuit 24 in this embodiment are independent of the compressor 2
It is possible to avoid the influence of the operation of one refrigerant circuit from the influence of the operation of the other refrigerant circuit because it is operated by 1 and 25 respectively. The evaporation effect is sufficiently exerted, and the cooling efficiency can be improved.

Further, each refrigerant circuit 2 is controlled by the controller 36.
Since the power supply to the compressors 21 and 25 constituting 0 and 24 can be controlled independently, one of them can be operated by operating the ON / OFF switches 34 and 35 provided in the control device 36, respectively. Refrigerant circuit 20 or 2
4 can be operated and only the other refrigerant circuit 24 or 20 can be stopped.
Alternatively, the cooling of 5 can be avoided, and power saving can be achieved.

Further, the cooling storage R in this embodiment is
Since the battery 33 as the power storage means is provided, a place where power cannot be continuously supplied, for example,
When installed in a place where power cannot be supplied only during business hours, or when installed in an environment where frequent power outages occur, control is performed from the battery 33 that has been precharged when commercial power is cut off. Compressor 21 via device 36
And 25. The battery 33 used in the present embodiment is assumed to be capable of being charged with a current that allows the cooling storage R to be continuously used for about 6 hours.

As a result, even when the power supply is cut off for a certain period of time, for example, about 6 hours in this embodiment due to a power failure or the like, the compressor 21 and the second refrigerant of the first refrigerant circuit 20 are continuously connected. The compressor 25 of the refrigerant circuit 24 can be operated, and the temperature of each storage chamber 4, 5 can be maintained at a constant temperature. Therefore, it becomes possible to avoid deterioration of the quality of the food or the like stored in the storage chambers 4, 5.

Further, as described above, the control device 36 is turned on / off.
By operating the OFF switches 34 and 35 respectively, it is possible to operate only one of the refrigerant circuits 20 or 24 and stop the operation of only the other refrigerant circuit 24 or 20, so that the storage chamber 4 not used Alternatively, the cooling of 5 can be avoided, and the consumption of the amount of electricity stored in the battery 33 can be saved.

[0046]

As described above in detail, according to the present invention, the first
And a heat-insulating box body in which the second storage chamber is partitioned and formed, and a heat-insulating door that opens and closes the openings of the first and second storage chambers.
A first refrigerant circuit including a compressor, a condenser, a pressure reducing device, an evaporator, and the like, a second refrigerant circuit including a compressor, a condenser, a pressure reducing device, an evaporator, and the like, and a first refrigerant circuit Since the first storage compartment is cooled by the evaporator of the first refrigerant circuit and the second storage compartment is cooled by the evaporator of the second refrigerant circuit, the control means for independently controlling the operation is provided. The operation of the refrigerant circuit of, it is possible to avoid affecting the operation of the other refrigerant circuit, by the evaporator disposed independently of the other refrigerant circuit, to exert a sufficient evaporation action, The cooling efficiency can be improved.

According to the invention of claim 2, in addition to the invention of claim 1, since the control means independently controls the power supply to each refrigerant circuit, the first storage chamber or the second storage chamber When either one of the rooms is operated and the other is not operated, it is possible to avoid unnecessary cooling of the storage room and control power consumption by controlling the respective power supply. .

According to the invention of claim 3, in addition to the invention of claim 1 or claim 2, since the compressor of each refrigerant circuit is provided with a storage means for supplying power respectively, in an environment where it is difficult to procure power. It will also be possible to use such a cold store. Further, even if the power supply is cut off for a certain period of time due to a power failure or the like, the compressors of the first refrigerant circuit and the second refrigerant circuit can be continuously operated, and the temperature in each storage chamber can be increased. Can be maintained at a constant temperature. Therefore, it becomes possible to avoid deterioration of the quality of the food or the like stored in the storage chamber.

According to the invention of claim 4, in addition to the invention of claim 1, claim 2 or claim 3, the first storage chamber is a machine room in which a compressor of each refrigerant circuit is installed. The control means is located between the second storage chambers, and the control means cools the first storage chamber to the refrigerating temperature and the second storage chamber to the freezing temperature, so that the machine room is heated to a high temperature by the operation of the compressor or the like. Then, the first storage chamber cooled to the refrigerating temperature and the second storage chamber cooled to the freezing temperature are arranged side by side in order, and the temperature difference between the respective chambers can be minimized. Therefore, it is possible to minimize the decrease in thermal efficiency due to the temperature difference.

According to the invention of claim 5, in addition to the invention of claim 4, since the inner door is provided inside the heat insulating door corresponding to the opening of the second storage chamber, the inside of the second storage chamber is It becomes possible to further suppress the leakage of cold heat to the outside.

According to the invention of claim 6, in addition to the invention of claim 4 or claim 5, the heat insulating wall of the heat insulating box located between the first storage chamber and the machine room is Since the thickness is made thicker than the heat insulation wall between the second storage room and the outside and the heat insulation wall between the first and second storage rooms, it is possible to make the cooling storage itself compact and to produce a machine room with a significant temperature difference. By maximizing the heat insulating wall between the first storage chambers, it is possible to remarkably suppress the infiltration heat due to the heat conduction from the machine room, and to stably cool the first storage chambers. Become.

According to the invention of claim 7, in addition to the invention of claim 4, claim 5 or claim 6, the heat insulating wall of the heat insulating box located between the first and second storage chambers is Since it is thinner than the heat insulating wall of other parts, the heat insulating wall with the smallest temperature difference will be thinner than other parts, and the reduction of thermal efficiency will be minimized while making the cooling storage itself compact. Will be able to.

[Brief description of drawings]

FIG. 1 is a perspective view of a cooling storage container according to the present invention.

FIG. 2 is a plan view of a cooling storage cabinet.

FIG. 3 is a front view of a cooling storage cabinet.

FIG. 4 is a plan view including an inner door of a cooling storage.

FIG. 5 is a refrigerant circuit diagram of a cooling storage.

FIG. 6 is an electrical block diagram of a cold store.

[Explanation of symbols]

R cooling storage 1 Insulation box A few cooling tanks 2A, 3A Top opening 4 First storage room (refrigeration storage room) 5 Second storage room (freezing storage room) 6,7 Evaporator 8 insulated doors 11 inner door 15 unit section 16,17 thermostat 20 First refrigerant circuit 21, 25 compressor 23, 26 condenser 24 Second refrigerant circuit 27, 28 Capillary tube (pressure reducing device) 30 control panel 31 outlet 32 AC / DC converter 33 battery 34, 35 ON / OFF switch 36 Controller

Continued front page    (72) Inventor Takashi Sekiguchi             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Kazuo Takano             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Hideya Ikeda             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. (72) Inventor Yukio Kashiwase             2-5-3 Keihan Hondori, Moriguchi City, Osaka Prefecture             Within Yo Denki Co., Ltd. F term (reference) 3L045 AA01 AA02 AA04 BA01 CA02                       DA02 HA02 LA01 LA05 LA12                       MA02 PA04 PA05 PA06                 3L102 JA01 KA09 KD01 LB01 LB36

Claims (7)

[Claims] 1. A heat-insulating box body in which first and second storage chambers are defined, a heat-insulating door for opening and closing the openings of the first and second storage chambers, a compressor, a condenser, A first refrigerant circuit including a pressure reducing device and an evaporator and the like, a second refrigerant circuit including a compressor, a condenser, a pressure reducing device and an evaporator, and the like. Control means for controlling, wherein the evaporator of the first refrigerant circuit cools the first storage chamber, and the evaporator of the second refrigerant circuit cools the second storage chamber, Cool storage to do. 2. The cooling storage according to claim 1, wherein the control means independently controls power supply to each of the refrigerant circuits. 3. A power storage means for supplying power to the compressor of each of the refrigerant circuits, respectively.
Alternatively, the cold storage according to claim 2. 4. The first storage chamber is located between a machine room in which a compressor of each refrigerant circuit is installed and the second storage chamber, and the control means controls the first storage chamber. Cooling store according to claim 1, 2 or 3, characterized in that the chamber is cooled to refrigerating temperature and the second storage chamber is cooled to freezing temperature. 5. The inner door is provided inside the heat insulating door so as to correspond to the opening of the second storage chamber.
Cold storage. 6. The heat insulating wall of the heat insulating box located between the first storage chamber and the machine room is a heat insulating wall between the first and second storage chambers and the outside, and The cooling storage cabinet according to claim 4 or 5, wherein the cooling storage compartment is thicker than the heat insulating wall between the first and second storage compartments. 7. The heat insulating wall of the heat insulating box located between the first and second storage chambers is made thinner than the heat insulating walls of other portions. Alternatively, the cooling storage according to claim 6.