JPH1172279A - Refrigeration apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep temperature distribution within a refrigerated warehouse small and enable reduction of equipment and operation costs by employing a constitution wherein cooling is carried out by guiding a liquid refrigerant cooled by a refrigeration apparatus into a refrigerated warehouse so as to bring the liquid refrigerant into contact with stored matters. SOLUTION: A refrigeration apparatus is of a constitution which employs a compression refrigerator comprising an evaporator 1, a condenser 2 and a compressor 3 and of a constitution wherein cooling water is circulated to the condenser 2 via a cold water pump 4 and a cooling tower 5. Cooling water or sea water is circulated between the evaporator 1 and a warehouse 7 by a cold water pump 6, and supercooling to a level of -1 to -2C is effected at an outlet of the evaporator 1. Cooled supercooled water 10 is directly supplied into the warehouse 7. In the warehouse 7, shelves 8 are provided and matters 9 to be stored are placed in the shelves 8. The matters 9 to be stored are cooled and kept at a temperature through direct contact with a supercooled water 10. Thus, interior of the refrigerated warehouse 7 is cooled without uneven temperature distribution by the water or sea water having a large specific heat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigeration apparatus provided with a refrigerated warehouse for storing stored items in a low temperature range.

[0002]

2. Description of the Related Art As shown in FIG. 3, a conventional refrigeration apparatus having a refrigeration warehouse for storing stored materials in a low temperature range of -1 to -2 ° C. comprises an evaporator 1, a condenser 2, and a compressor 3. The air in the refrigerated warehouse 7 is cooled by the compression type refrigerator and the air heat exchanger 13 having a fan, and the cooled air is used as a medium to cool the stock 9 on the shelf 8 in the refrigerated warehouse 7 to keep it cool. It is configured to do so.

The condenser 2 is provided with a cooling water pump 4 from a cooling tower 5.
The cooling water is circulated and supplied to cool and condense the pressurized refrigerant discharged from the compressor 3.

In the conventional refrigeration apparatus shown in FIG. 3, the storage 9 is cooled and kept cool by using air having a small specific heat as a heat medium.

As a result, the temperature distribution in the vicinity of the storage material 9 or in a place remote from the air heat exchanger 13 becomes large, causing a problem that cooling unevenness occurs. Further, there is a concern that the heat transfer performance of the air heat exchanger 13 may be degraded due to condensation on the heat transfer surface.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks of the conventional refrigeration apparatus, and has a refrigeration apparatus having a refrigeration warehouse for storing articles in a low-temperature region. It is an object of the present invention to keep the temperature distribution at a low temperature and to reduce the cost of the apparatus and operation.

[0007]

In order to solve the above-mentioned problems, the present invention is configured such that a liquid medium is cooled by a refrigerating apparatus, and the cooled liquid medium is guided to a refrigerated warehouse to be brought into contact with a storage object to cool the liquid medium. A refrigeration device is provided.

In the refrigeration apparatus according to the present invention, seawater or the like is used as a liquid medium, which is cooled to -1 to -2 ° C., brought into a supercooled state, guided to a refrigerated warehouse, and brought into direct contact with the storage object, Ice is generated by releasing the supercooling, and the ice is used to cool the stock.

In this case, if the amount of ice making is large, the concentration of the liquid medium, for example, seawater, changes and the freezing point changes. Therefore, it is preferable to provide an additive adjusting tank for the liquid medium to keep the change small. .

Thus, according to the refrigeration apparatus of the present invention,
Since the stored material in the refrigerated warehouse is cooled using a liquid medium such as seawater having a large specific heat (heat capacity), the temperature distribution in the refrigerated warehouse can be reduced, and the temperature distribution in the refrigerator can be kept small.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a refrigeration apparatus according to the present invention will be specifically described based on the embodiments shown in FIGS. In the following embodiments, the same components as those of the conventional apparatus shown in FIG. 3 are denoted by the same reference numerals for simplification of description.

(First Embodiment) First, the first embodiment shown in FIG.
The refrigeration apparatus according to the embodiment will be described. As shown in FIG. 1, the refrigeration apparatus according to the first embodiment includes an evaporator 1,
The cooling water is circulated through the cooling water pump 4 and the cooling tower 5 through the cooling water pump 4 and the cooling tower in the condenser 2, and this point is shown in FIG. It is the same as the conventional refrigerator.

In the evaporator 1, chilled water or seawater is circulated between the refrigerated warehouse 7 and the chilled water pump 6, and the outlet of the evaporator 1 is supercooled to a level of -1 to -2 ° C. The cooled supercooled water (or seawater) 10 is directly supplied into the refrigerated warehouse 7. A shelf 8 is provided inside the refrigerated warehouse 7, and a storage 9 is stored in the shelf 8.

The stock 9 is cooled and maintained in temperature by direct contact with supercooled water (or seawater) 10. In this way, the inside of the refrigerated warehouse 7 is cooled to a less uniform temperature by water or seawater having a large specific heat.

(Second Embodiment) Next, the second embodiment shown in FIG.
The refrigeration apparatus according to the embodiment will be described. In FIG. 2, reference numeral 12 denotes an additive adjustment tank. This tank 12 is provided for adjusting the salt concentration and the like in the liquid medium circulated between the evaporator 1 and the cold storage 7.

The refrigerator of FIG. 2 is substantially the same as that of FIG. 1 except that the additive adjusting tank 12 is provided. However, in the refrigeration system shown in FIG.
Ice 11 is generated by the supercooling release of the liquid medium at
The temperature of the circulating cold water is automatically adjusted by the formation and melting of the ice.

When the amount of ice from the liquid medium such as seawater is large, the change in the concentration of the liquid medium (change in the freezing point) is reduced by the operation of the additive adjusting tank 12.

[0018]

As described above, the refrigeration apparatus according to the present invention has a refrigeration apparatus and a refrigeration warehouse, cools the liquid medium by the refrigeration apparatus, and guides the cooled liquid medium to the refrigeration warehouse. The liquid medium and the ice generated from the supercooled liquid medium are configured to be brought into contact with the stored material and cooled.

Therefore, according to the refrigerating apparatus of the present invention, the temperature distribution in the warehouse can be reduced by using water or ice having a higher specific heat (heat capacity) than the conventional cooling apparatus using cooling air, and the large warehouse can be used. In this case, the temperature can be made uniform. In addition, an air-cooling type does not require a blower, which makes it possible to reduce the size and cost of the apparatus.

In the refrigeration apparatus of the present invention, in the case where an additive adjusting tank for the liquid medium is provided, ice is generated by supercooling the liquid medium, and the storage is cooled by the ice. In addition, the apparatus can reduce the change of the freezing point of the liquid medium.

[Brief description of the drawings]

FIG. 1 is a system diagram showing a configuration of a refrigeration apparatus according to a first embodiment of the present invention.

FIG. 2 is a system diagram showing a configuration of a refrigerator according to a second embodiment of the present invention.

FIG. 3 is a system diagram showing a configuration of a conventional refrigerator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Evaporator 2 Condenser 3 Compressor 4 Cooling water pump 5 Cooling tower 6 Cold water pump 7 Cold storage 8 Shelf 9 Storage 10 Supercooled water 11 Ice 12 Additive adjustment tanta

Claims (2)

[Claims] 1. A refrigerator having a refrigerating device and a refrigerated warehouse, wherein a liquid medium is cooled by the refrigerating device, and the cooled liquid medium is guided to the refrigerated warehouse to be brought into contact with a storage to be cooled. Refrigeration equipment characterized. 2. The refrigerating apparatus according to claim 1, further comprising a tank for adjusting an additive to the liquid medium in a circulation path of the liquid medium to reduce a change in freezing point.