JP2002162148A - Cool storage type cold insulation cabinet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cool storage type cold insulation cabinet having an excellent energy conservation without excessively cooling a cold storage article when the article is cold insulated. SOLUTION: The cool storage type cold insulation cabinet has a cool storage drive mode for deep freezing a cool storage agent of a cool storage unit by a cooler, and a cold insulation drive mode for cold insulating an article housing chamber by circulating indoor air to the agent. The cabinet comprises a cool storage changeover switch 25 for selectively switching a deep freezing operation and a cold storage operation of the cold insulation drive mode. In this case, a deep freezing amount of the agent is variably set in the cool storage drive mode or is set, for example, based on atmospheric temperature information of an atmospheric temperature sensor 22 or an atmospheric temperature information input switch 24. Thus, the agent can be frozen to meet the freezing operation or the cold insulation operation. A cold amount supplied from the agent can be suitably dealt with cold insulation of the frozen article or the cold insulation article.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a regenerative refrigerator for transporting articles cooled by a regenerator on a vehicle.

[0002]

2. Description of the Related Art Hitherto, as this kind of regenerative cold storage, a number of proposals have been made, such as Japanese Patent Application Laid-Open No. H11-108525.

[0003] The cold storage type cold storage is used to keep the articles stored in the article storage room cool. When keeping the articles cool, the refrigerating agent of the cold storage unit is frozen by a cooling device in advance.
When transporting the articles in the article storage room, the internal circulation fan is driven to exchange heat between the cold storage agent and the air in the warehouse to keep the article storage room cool.

Further, the temperature of the article storage room is detected by a temperature sensor in the refrigerator, and a circulation fan for the refrigerator is driven so as to correspond to the refrigerated article or the frozen article. By controlling, the article storage room is kept cool at a temperature corresponding to the stored articles.

[0005]

By the way, in order to realize a regenerative cold storage in which both the frozen article and the refrigerated article can be kept cool, it is necessary to select a regenerator that can cope with the cooling of both. Usually, the cold storage temperature of frozen goods is -18 ° C,
If the cold storage temperature of the refrigerated article is 3 ° C., the cold storage (freezing) temperature of the cold storage agent is −25 ° C., and the cold storage agent corresponding to this temperature is selected.

[0006] However, when keeping frozen articles, it does not matter much, but when keeping refrigerated articles, the difference between the regenerator temperature (-25 ° C) and the refrigeration temperature (3 ° C) becomes very large. Therefore, it is very difficult to maintain the refrigeration temperature of the article storage room, and the conduction heat from the cold storage agent is conducted to the article storage room, and a portion close to the cold storage room,
That is, there is a problem that the lower part of the article storage chamber is excessively cooled. Further, when refrigerated in the season when the outside air temperature is relatively low, the effect of conduction heat of the regenerator increases,
Even when the internal circulation fan is not driven, there is a problem that the temperature of the article storage chamber is significantly lower than the refrigeration set temperature. Furthermore, even when keeping refrigerated articles cool, the cold storage agent is configured to be frozen in the same manner as when keeping frozen articles, so that the cold storage energy is excessive and energy saving is disadvantageous. .

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a regenerative refrigerator which does not excessively cool the refrigerated articles when keeping the refrigerated articles, and which is excellent in energy saving. It is in.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a regenerative operation mode in which a refrigerating agent in a regenerative unit is frozen by a cooling device, and air in the refrigerator is circulated through the regenerative agent. In the regenerative cold storage box having a switch for selectively switching between the refrigerating operation and the refrigerating operation in the refrigerating operation mode, the refrigerating operation mode for keeping the article storage room cool, and the refrigerating amount of the regenerator in the regenerative operation mode is determined. The structure has variable freezing amount variable means.

According to the present invention, the refrigerating agent can be frozen in accordance with the freezing operation or the refrigerating operation, and the amount of cold supplied from the refrigerating agent can correspond to the frozen article or the cold storage of the refrigerated article.

According to a second aspect of the present invention, in the cold storage type cold storage according to the first aspect, the freezing amount variable means can change the temperature of the cold storage agent temperature sensor for detecting the temperature of the cold storage agent and the temperature detected by the cold storage agent temperature sensor. Control means for controlling the cooling device based on the regenerator setting temperature. Thereby, the refrigerated article or the frozen article can be kept at an appropriate temperature by appropriately changing the regenerator setting temperature.

According to a third aspect of the present invention, in the regenerative cold storage according to the second aspect, the refrigerating set temperature is set based on a refrigerating operation signal or a refrigerating operation signal from a changeover switch. Sets the regenerator setting temperature higher than in the freezing operation.

According to a fourth aspect of the present invention, in the cool storage type cold storage according to the second aspect, the refrigerating operation signal from the changeover switch and the detected temperature of the outside air temperature sensor for detecting the temperature of the outside air or forced input are provided. Set based on outside air temperature information. In this way, when the outside air temperature is low and the cold heat of the regenerator may have an excessive effect on refrigeration, the refrigerating agent set temperature can be set higher. It can be carried out.

According to a fifth aspect of the present invention, in the cold storage type cold storage according to the first aspect, the freezing amount variable means has a plurality of cold storage units and a control means for varying the number of cooling of each cold storage unit. .

According to the present invention, the number of cooling of the regenerator can be changed in accordance with the freezing operation or the refrigeration operation.
The amount of cold supplied from the regenerator can be appropriately adapted for keeping the frozen article or the refrigerated article cool.

According to a sixth aspect of the present invention, in the cold storage type cold storage according to the fifth aspect, the control means is configured to set based on a refrigeration operation signal or a refrigeration operation signal from a changeover switch. Set the cooling number of the unit to be lower than in the refrigeration operation.

According to a seventh aspect of the present invention, in the cool storage type cold storage according to the fifth aspect, the control means includes a refrigeration operation signal from a changeover switch, a detection temperature of an outside air temperature sensor for detecting an outside air temperature, or a forced input outside air temperature. It is structured to control based on information. In this way, when the outside air temperature is low and the cold of the regenerator may have an excessive effect on refrigeration, the number of cooling units in the regenerative storage unit can be reduced. It can be carried out.

According to an eighth aspect of the present invention, in the cold storage type cold storage according to any one of the first to seventh aspects, a heating device for defrosting the cold storage agent is provided. After that, the regenerator can be stored in the cooling device, and the frozen amount of the regenerator can be set to a desired value.

According to a ninth aspect of the present invention, in the cold storage type cold storage according to the eighth aspect, a structure is provided having control means for controlling the heating device based on the temperature detected by the cold storage temperature sensor for detecting the cold storage temperature. When the temperature of the regenerator reaches the defrosting temperature of the regenerator, the operation of the heating device is stopped.

[0019]

1 to 9 show a first embodiment of a regenerative refrigerator according to the present invention. FIG. 1 is a perspective view of a regenerative refrigerator, and FIG. 3 is an assembled perspective view showing the structure of the regenerator unit, FIG. 4 is a cross-sectional view showing the joined state of an evaporator pipe and a regenerator, FIG. 5 is a refrigerant circuit diagram of a regenerative cold storage, and FIG. FIG. 7 is a flowchart showing an example of cold storage operation control, FIG. 8 is a flowchart showing another example of cold storage operation control, and FIG. 9 is a flowchart showing thawing control of a cold storage agent.

First, the use of the cold storage type cold storage according to the present embodiment will be described. This regenerative cold storage is used for transporting frozen articles or refrigerated goods by truck, etc., and stores these articles in a refrigerating cold refrigerating cooler, and loads the refrigerating cooler on a truck or the like. Then, it is used in a home delivery system for home delivery of articles to a predetermined location.

As shown in FIG. 1 and FIG. 2, the cold storage type cold storage used in such a home delivery system has an inner box 1a and an outer box 1b arranged at a predetermined interval, and each box 1a, 1b The cold storage main body 1 has a rectangular parallelepiped shape filled with a heat insulating material 1c such as urethane foam. A machine room 2 is provided on the upper surface of the cool box main body 1, and a compressor 2 a is provided in the machine room 2.
While a cooling device including a condenser 2b, a condenser fan 2c, and the like is installed, an opening / closing door 3 is installed on a front surface of the cold storage main body 1.

The interior of the cool box main body 1 is vertically divided by a heat insulating partition plate 4 at the lower portion, and above the partition plate 4 is an article storage chamber 5 for storing frozen or refrigerated articles.
On the other hand, a cold storage chamber 6 is formed below the partition plate 4, and a cold storage unit 7 is arranged in the cold storage chamber 6.

As shown in FIGS. 3 and 4, the regenerative storage unit 7 has a large number of stacked two-part square heat transfer cases 7a arranged along the flow direction of the wind. 7a, a heat exchange plate 7b around which an evaporator 2d composed of a refrigerant pipe is wound is disposed at the center thereof, and the cold storage agent 7 contained in a bag body with the heat exchange plate 7b interposed therebetween.
c is accommodated. The heat transfer cases 7a adjacent to each other on the left and right are arranged at an interval from each other by upper and lower support plates 7d, so that air in the refrigerator passes between the heat transfer cases 7a. Further, as shown in FIG. 2, a heating device, for example, an electric heater 7e is installed in the cold storage unit 7, and when the electric heater 7e is energized, the cold storage agent 7 is turned on.
c to be decompressed.

On the other hand, the partition plate 4 has a cold air inlet 8 at its front side.
, And a cool air outlet 9 is opened on the rear side, and the other portions are completely partitioned in the upper and lower directions. This cool air outlet 9 has a ventilation duct 1 extending toward the article storage room 5.
0 communicates with each other, and an in-compartment circulation fan 11 is installed above the ventilation duct 10.

Referring to FIG. 5, a description will be given of a refrigerant circuit constituting a cooling device of the regenerative cold storage constructed as described above. That is, the refrigerant circulates in the order of compressor 2a → condenser 2b → expansion valve 2e → evaporator 2d → compressor 2a. As a result, the regenerator 7c is cooled by the refrigerant circulating in the evaporator 2d and stored (cool operation). When the in-compartment circulation fan 11 is driven after the cool storage operation, the air in the article storage room 5 circulates in the cool storage room 6 as shown by an arrow in FIG. The stored regenerator 7c cools the air passing between the heat transfer cases 7a and keeps the article storage room 5 cool (freezing operation or refrigeration operation).

Next, an electric circuit of the regenerative refrigerator according to the present embodiment will be described with reference to FIG. That is, the commercial power supply 12
Is connected to a battery 14 through a charger 13, and the battery 14 is charged by power supply from the commercial power supply 12. The commercial power supply 12 has a DC power supply 15
Are connected to convert an alternating current into a direct current.
The power supply from the battery 14 and the DC power supply 15 is selectively selected by a power switch 16 with a built-in relay. When the commercial power 12 is supplied to the relay coil, the power supply of the DC power supply 15 When power is supplied, while the power supply from the commercial power
Power is supplied.

The commercial power supply 12 has a relay switch 1
The compressor 2 a and the electric heater 7 e are connected in parallel via the switches 7 and 18, and are each turned on and off based on a control signal from the control device 19.

The internal circulation fan 11 and the condenser fan 2c are driven through a fan drive circuit 20, respectively. Here, the fan drive circuit 20 is connected to the controller 1
9 is controlled based on the control signal.

In the regenerative cold storage constructed as described above, the control device 19 includes a temperature sensor 21 for detecting the temperature in the article storage room 5, an external temperature sensor 22 for detecting the external temperature, and the regenerator 7c. The temperature detected from the regenerator temperature sensors 23a, 23b, 23c for detecting the temperature of the air is input. Here, the regenerator temperature sensors 23a, 23b, 2
3c, the cold storage agent temperature sensor 23a detects the temperature of the portion of the cold storage unit 7 where the cold storage agent 7c is most easily melted, and the cold storage agent temperature sensor 23b, on the contrary, detects the cold storage agent 7c The temperature of the cold storage agent temperature sensor 23c detects the temperature of an intermediate portion. As described above, the temperature is detected from three places because there are places where the cold storage agent 7c is easily thawed and places where the cold storage agent 7c is not easily thawed in the direction of the wind in the cold storage chamber 6, and the state of the cold storage agent 7c being thawed. Is to be accurately determined.

Switch signals are input to the control device 19 from the outside air temperature information input switch 24 and the cool storage switch 25. Here, the outside air temperature information input switch 24 is connected to a place where the outside air temperature cannot be obtained (the outside air temperature sensor 22).
Is not functioning effectively), for example, a regenerative refrigerator is placed indoors, and the temperature of the outside air is forcibly input during the regenerative operation. In the cold storage operation of the article storage room 5 performed after the cold storage operation, the cold storage changeover switch 25 inputs either the freezing operation (cooling of frozen articles) or the refrigeration operation (cooling of refrigerated articles). .

In the cold storage type cold storage constructed as described above, the following two types of cold storage operation control can be performed. The first cold storage operation control will be described with reference to FIG.
It is determined which of the "refrigeration operation" and the "refrigeration operation" is selected (S1). Here, when the refrigerating operation is selected, the regenerator temperature is set to T1 (T1).
1; for example, -25 ° C. which is the whole freezing agent freezing temperature) (S
2). On the other hand, when the refrigeration operation is selected, the temperature of the regenerator is set to T2 (T2; for example, -4 ° C., which is a partly frozen temperature of the regenerator) (S3). In such cold storage operation control, the temperature of the cold storage agent is proportional to the amount of freezing and the amount of cold storage of the cold storage agent 7c. Can be kept cool,
During the refrigeration operation, the article storage room 5 can be kept cool, for example, at 3 ° C., which is suitable for keeping the refrigerated articles cool.

Next, the second cold storage operation control will be described with reference to FIG. When performing the cold storage operation, first, it is determined whether the “refrigeration operation” or the “refrigeration operation” is selected by the cold storage changeover switch 25 (S11). Here, when the refrigerating operation is selected, the regenerator temperature is set to T1 (−25 ° C.) as in the first regenerative operation control described above (S12). On the other hand, when refrigeration operation is selected,
It is determined whether or not the outside air temperature is lower than 10 ° C. based on a detection signal from the outside air temperature sensor 22 or a switch signal from the outside air temperature information input switch 24 (S13). Here, when the outside air temperature is higher than 10 ° C., the regenerator temperature is set to T2 (−4 ° C.) as in the first cold storage operation control (S14). On the other hand, when the outside air temperature is as low as in winter, 10
If the temperature is lower than ° C, the regenerator temperature is set to T3 (for example, 1 ° C, which is slightly lower than the article refrigeration temperature) (S15). As described above, when performing the refrigeration operation for keeping the refrigerated articles cool, the article storage room 5 can be kept cool at a temperature suitable for keeping the refrigerated articles cool based on the outside air temperature.

In the regenerative cold storage according to this embodiment, the amount of cold storage (freezing amount) in the refrigerating operation differs depending on whether the operation is the refrigeration operation or the refrigeration operation as described above. When carrying out the refrigeration operation (after carrying the frozen goods) (after carrying the refrigerated goods), the amount of cold storage remaining in the cold storage agent 7c may be larger than the amount of cold storage required for the refrigeration operation. . When performing a refrigeration operation in such an excessively cold storage state, troubles such as freezing of refrigerated articles occur.

In order to solve such a problem, in the regenerative cold storage according to the present embodiment, thawing control of the regenerator 7c is performed as shown in the flowchart of FIG. That is,
When performing the cold storage operation, first, it is determined whether the “refrigeration operation” or the “refrigeration operation” is selected by the cold storage changeover switch 25 (S21). Here, when the refrigeration operation is selected, the process immediately shifts to the cold storage operation of the cold storage agent 7c (S22). On the other hand, when refrigeration operation is selected,
It is determined whether or not thawing failure has occurred based on the temperatures detected by the regenerator temperature sensors 23a, 23b, and 23c (S
23) If the thawing is not defective, that is, if the temperature of the cold storage agent 7c is higher than the temperature suitable for the refrigeration operation, the process shifts to the cold storage operation of step 22. On the other hand, when the thawing is defective, the electric heater 7e is energized (S24). The energization of the electric heater 7e is continued until the regenerator 7c is completely thawed, that is, until the temperature detected by the regenerator temperature sensor 23b at the most difficult place to defrost reaches the defrosting temperature. When the thawing temperature is reached, the energization of the electric heater 7e is terminated (S25). After that, the operation shifts to the cold storage operation of step 22.

According to the regenerative refrigerator according to the present embodiment,
When performing the "freezing operation" or the "refrigeration operation", the amount of freezing of the regenerator 7c corresponding to the freezing or the refrigeration operation mode can be changed. Can be changed to

Further, since the cold storage agent 7c can be thawed before performing the cold storage operation, the refrigerated articles are not excessively cooled during the cold storage operation.

FIGS. 10 to 13 show a second embodiment of a regenerative refrigerator according to the present invention. FIG. 10 is a refrigerant circuit diagram of the regenerative refrigerator, and FIG. 11 is a drive control circuit of the regenerator. FIG. 12 and FIG. 12 are flowcharts showing an example of the cold storage operation control, and FIG. 13 is a flowchart showing another example of the cold storage operation control.

In the second embodiment, as shown in FIG. 10, three cold storage units 70a, 70b, 7
0c are arranged in parallel in the flow direction of the wind, and each regenerator unit 70a, 70b, 70c is connected to the expansion valve 2e and the compressor 2a.
And a pipe is connected in parallel. Electromagnetic valves 71a, 71c for controlling the refrigerant flow are arranged in the connecting pipes of the cold storage units 70a, 70c arranged at both ends of the cold storage units 70a, 70b, 70c. Each of the regenerator units 70a, 70b, 70c is provided with a regenerator temperature sensor 23a, 23b, 23c, respectively.

In the second embodiment, as shown in FIG. 11, each of the solenoid valves 71a and 71c is connected to the commercial power supply 12 through the relay switch 26, and each of them is controlled based on a control signal from the control device 19. On-off drive is performed in conjunction with both.

The other configuration is the same as the configuration of the cold storage cool storage according to the first embodiment, and the description thereof is omitted.

In the cold storage type cold storage according to the second embodiment configured as described above, the following two types of cold storage operation control can be performed. The first cold storage operation control will be described with reference to FIG. 12. When performing the cold storage operation, first, it is determined whether the “refrigeration operation” or the “refrigeration operation” is selected by the cold storage changeover switch 25. (S31).
Here, when the refrigeration operation is selected, the solenoid valves 71a,
The cold storage operation is performed by setting 71c to an open state (ON state). On the other hand, when the refrigeration operation is selected, each of the cold storage units 70 is kept off with the electromagnetic valves 71a and 71c turned off.
a, 70c to regulate the refrigerant flow to cool storage unit 70b
(S32).

According to such cold storage operation control, cold storage is performed in all the cold storage units 70a to 70c when performing the freezing operation, and cold storage (partially cold storage) is performed only in the cold storage unit 70b when performing the refrigeration operation. Frozen). Therefore, the amount of cold storage corresponds to the freezing operation or the refrigeration operation as appropriate.

Next, the second regenerative operation control will be described with reference to FIG. 13. When performing the regenerative operation, first, either the "refrigerating operation" or the "refrigerating operation" is selected by the regenerative operation switch 25. It is determined whether it has been performed (S41). Here, when the refrigeration operation is selected, the solenoid valves 71a and 71c are opened (ON state) to perform the cold storage operation as in the first cold storage operation control (S42). On the other hand, when the refrigeration operation is selected, it is determined whether the detected temperature of the outside air temperature sensor 22 or the input temperature from the outside air temperature information input switch 24 is 10 ° C. or less (S43). Here, when the temperature is higher than 10 ° C., the cold storage operation is performed in the same manner as when the refrigeration operation is selected.
When the temperature is 0 ° C. or lower, the solenoid valves 71a and 71c are turned off, the flow of the refrigerant to each of the cold storage units 70a and 70c is regulated, and the refrigerant flows only to the cold storage unit 70b.

According to such cold storage operation control, when performing the freezing operation or when the outside air temperature is higher than 10 ° C. in the refrigeration operation, the cold storage units 70a to 70c store the cold (all the cold storage and freezing). When the temperature is equal to or lower than 10 ° C., cold is stored only in the cold storage unit 70b (partially cold storage is frozen). Therefore, the amount of cold storage corresponding to the outside air temperature during the refrigeration operation is obtained.

In the regenerative cold storage according to the second embodiment, the amount of cold storage remaining in the regenerators 70a, 70b, 70c during the refrigeration operation is the same as in the regenerative cold storage according to the first embodiment. May be larger than the amount of cold storage required for the refrigeration operation. In such a case, the decompression control shown in FIG. 9 is performed as in the first embodiment.

[0046]

As described above, according to the first to seventh aspects of the present invention, the regenerator can be frozen in accordance with the freezing operation or the refrigerating operation, and the amount of cold heat supplied from the regenerator can be reduced. It is possible to appropriately cope with the cold keeping of the frozen article or the refrigerated article, does not cause a problem such as the frozen article being frozen during the refrigeration operation, and is excellent in energy saving.

According to the eighth and ninth aspects of the present invention, the regenerator of each regenerator unit is completely thawed in advance by the heating device.
After that, the regenerator can be stored in the cooling device, and the frozen amount of the regenerator can be set to a desired value.

[Brief description of the drawings]

FIG. 1 is a perspective view of a regenerative cold storage according to a first embodiment.

FIG. 2 is a cross-sectional view of a cool storage cold storage according to the first embodiment.

FIG. 3 is an assembled perspective view showing the structure of the cold storage unit according to the first embodiment.

FIG. 4 is a cross-sectional view showing a joint state between the evaporator pipe and the regenerator according to the first embodiment.

FIG. 5 is a refrigerant circuit diagram of a regenerative cold storage according to the first embodiment.

FIG. 6 is a drive control circuit diagram of the regenerative refrigerator according to the first embodiment;

FIG. 7 is a flowchart illustrating an example of cold storage operation control according to the first embodiment.

FIG. 8 is a flowchart showing another example of the cold storage operation control according to the first embodiment.

FIG. 9 is a flowchart showing the control of thawing the regenerator according to the first embodiment;

FIG. 10 is a refrigerant circuit diagram of a regenerative cold storage according to a second embodiment.

FIG. 11 is a drive control circuit diagram of a regenerative refrigerator according to a second embodiment.

FIG. 12 is a flowchart illustrating an example of cold storage operation control according to the second embodiment.

FIG. 13 is a flowchart illustrating another example of the cold storage operation control according to the second embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cold storage main body, 5 ... Article storage room, 6 ... Cold storage room, 7
0a, 70b, 70c ... cool storage unit, 7c ... cool storage agent,
7e: electric heater, 19: control means, 23a, 23b,
23c: cool storage temperature sensor, 24: outside air temperature information input switch, 25: cool storage changeover switch.

Claims (9)

[Claims] 1. A cold storage operation mode in which a cooling device freezes a cold storage agent of a cold storage unit and a cold storage operation mode in which air in a refrigerator is circulated through the cold storage agent to keep the article storage room cool. A refrigerating cool storage having a changeover switch for selectively switching between a freezing operation and a refrigeration operation, characterized in that the refrigerating cooler comprises a freezing amount variable means capable of changing a freezing amount of the refrigerating agent in the cold storage operation mode. 2. The freezing amount varying means includes a regenerator temperature sensor for detecting a regenerator temperature, and a control means for controlling a cooling device based on the temperature detected by the regenerator temperature sensor and a regenerator set temperature that can be changed. 2. The method according to claim 1, wherein
The cold storage refrigerator described. 3. The regenerative refrigerator according to claim 2, wherein the set temperature of the regenerator is set based on a refrigerating operation signal or a refrigerating operation signal from the changeover switch. 4. The method according to claim 1, wherein the refrigerating agent set temperature is set based on a refrigerating operation signal from the changeover switch, a detected temperature of an outside air temperature sensor for detecting an outside air temperature, or forcibly input outside air temperature information. Item 4. A regenerative cold storage according to item 2. 5. The cool storage type cold storage according to claim 1, wherein said freezing amount variable means has a plurality of said cool storage units and a control means for changing a cooling number of each cool storage unit. 6. The regenerative cold storage according to claim 5, wherein said control means sets based on a refrigeration operation signal or a refrigeration operation signal from said changeover switch. 7. The control device according to claim 1, wherein the control unit controls based on a refrigeration operation signal from the changeover switch, a detected temperature of an outside air temperature sensor for detecting an outside air temperature, or forcibly input outside air temperature information. 8. The cool storage cold storage according to 8. 8. The cool storage type cold storage according to claim 1, further comprising a heating device for thawing the cool storage agent. 9. The regenerative cold storage according to claim 8, further comprising control means for controlling the heating device based on the temperature detected by the regenerator temperature sensor for detecting the regenerator temperature.