JP3295748B2 - Refrigeration equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the generation of cold heat of 0.degree. C. or less by combining a refrigerant with a reactant (or adsorbent) which adsorbs or reacts with the refrigerant to reduce the pressure of the refrigerant vapor. The present invention relates to a configuration of a chemical type refrigerating apparatus and a combination of a reactant (adsorbent) and a refrigerant.

[0002]

2. Description of the Related Art A well-known example related to the present invention is disclosed in Document 1 (Ice water generation by absorption refrigerator, No. 930-63, Proceedings of the 71st Annual Meeting of the Japan Society of Mechanical Engineers, Vol D, P1).
06-P108, 2-4 October 1993 Hiroshima) and Reference 2
(Industrial materials, Vol. 32, No. 5, p. 49-54, 1984).

[0003]

Document 1 discloses the result of freezing water as a cooling medium using an absorbent, but does not produce cold heat of 0 ° C. or less. In addition, there is some description in Literature 2 that the use of silica gel as an adsorbent and methanol as a refrigerant to generate cold heat of 0 ° C. or less, but does not disclose the specific configuration of the apparatus and disclose organic substances. Since methanol is used in contact with the adsorbent, there is a problem such as denaturation.

[0004] It is an object of the present invention to provide a combination of a reactant and a refrigerant that can generate cold heat of 0 ° C or less and that is not denatured during use of the refrigerant, and generate a cold heat of 0 ° C or less to freeze a liquid. Another object of the present invention is to provide a specific device configuration capable of performing a large-capacity cold storage.

[0005]

LiBr solution as refrigerant SUMMARY OF THE INVENTION, CaCl ₂ aqueous solution, aqueous inorganic salt solution such as NaCl aqueous solution, and a substance equivalent thereto. An evaporator containing such a refrigerant, a container containing a reactant (or adsorbent), and a condenser for condensing refrigerant vapor are connected by a pipe so as to form a circulation loop.

An object of the present invention is to provide a plurality of containers containing a reactant and having a heat exchange means, a condenser connected to each of the plurality of containers via a valve, and condensing refrigerant vapor generated in the containers. An evaporator connected to the condenser to evaporate a refrigerant therein, a tank having the evaporator therein and having the evaporator immersed in a liquid in a tank, the evaporator and the plurality of containers, respectively. Is connected via a valve and guides the refrigerant vapor generated in the evaporator to the container, and a heat utilization means provided in the tank, wherein the condenser and the evaporator have a temperature of 0 ° C. together with the refrigerant without solidification is sealed, the evaporator is two or more, a condenser
Make sure that each evaporator is connected via a valve.
Achieved by the refrigerating device characterized .

[0007] Another object of the present invention is to provide a plurality of containers containing a reactant and provided with heat exchange means, and a condenser connected to each of the plurality of containers via a valve for condensing refrigerant vapor generated in the containers. An evaporator connected to the condenser via a valve to evaporate the refrigerant therein; a tank disposed below the evaporator for storing liquid; and a liquid in the tank on the surface of the evaporator. Means for flowing down, a pipe connecting the evaporator and each of the plurality of containers via a valve to guide refrigerant vapor generated in the evaporator to the container, and a heat utilization means provided in the tank. And a refrigeration system in which a refrigerant that does not solidify at 0 ° C. is sealed in the condenser and the evaporator.

[0008]

The inorganic salt aqueous solution does not change even when it comes into contact with the reactant (or adsorbent). Further, even when the temperature becomes 0 ° C. or less, freezing does not occur and it is effective for generating cold heat of 0 ° C. or less. Further, the evaporator, the reaction material storage container, and the condenser are effective for continuously generating cold heat of 0 ° C. or less to freeze the liquid around the evaporator.

The inside of a system in which a refrigerant circulates, such as a container containing a reactant, a condenser, and an evaporator, is evacuated by a vacuum pump or the like to be depressurized. Reactant reacts with refrigerant vapor (adsorption)
As a result, the refrigerant vapor is removed from the container storing the reactant, and the pressure is reduced. When the evaporator supplied with the refrigerant is connected to the container containing the reactant, the refrigerant vapor in the evaporator flows into the container, reacts with the reactant, and is taken in. This process is the reaction process of the container. The refrigerant in the evaporator continues to evaporate while the refrigerant vapor continues to be taken into the reactant. When the reactant reacts with the refrigerant vapor, the heat of the reaction increases the temperature of the reactant.
Since the force with which the reactant takes in the refrigerant vapor decreases as the temperature rises, cooling is performed by an air cooling fan or a heat pipe.
The evaporator is in contact with the liquid stored in the tank across the wall surface, and the refrigerant evaporates by taking away the heat of evaporation from the liquid and the liquid refrigerant in the evaporator. Therefore, the liquid refrigerant and the liquid in the tank are cooled. That is, generation of cold heat. Since a refrigerant that does not solidify even at 0 ° C. is used, the temperature of the liquid in the tank becomes 0 ° C. or less as the refrigerant evaporates. On the other hand, if the liquid in the tank is, for example, water, it starts to freeze from a portion in contact with the evaporator. That is, since the phase change is performed, a large amount of cold heat can be stored. The supply of the refrigerant from the condenser to the evaporator is not performed continuously, but is performed in a batch process.

When the reactants have completely reacted and no longer take in refrigerant vapor, the connection between the evaporator and the container is cut off, and the container and the condenser are connected. Next, the reaction material in the vessel is heated via the heat exchange means. The heated reactant causes a reaction opposite to that at the time of taking in the refrigerant vapor, and releases the refrigerant vapor. The released refrigerant vapor is led to a condenser, where it is cooled and condensed into a liquid refrigerant. This process is a container regeneration process. The regeneration process ends when no refrigerant vapor is released from the reactants, and the connection between the container and the condenser is disconnected.

When the regeneration process is completed, a cooling process of the container is started. Since the reactants are heated during the regeneration process, they need to be cooled. The cooling of the reaction material (vessel) is performed by air cooling or cooling by a heat pipe. On the other hand, the condenser and the evaporator are connected, and a predetermined amount of liquid refrigerant is supplied from the condenser to the evaporator. When the supply of the refrigerant is completed, the condenser and the evaporator are isolated again. Thereafter, the above-described cycle is repeated again, and cold storage in the liquid in the tank proceeds.

In the case of one container, one condenser and one evaporator, the evaporation process of the evaporator proceeds simultaneously with the reaction process of the container, and the condensation process of the condenser proceeds simultaneously with the regeneration process of the container. The supply of the refrigerant from the condenser to the evaporator is performed during a regeneration process or a cooling process of the container. If the number of containers and evaporators is plural, it is possible to combine these processes to generate cold heat continuously.

Instead of disposing the evaporator in contact with the liquid in the tank, the evaporator is disposed, for example, in the space above the tank, and the liquid is allowed to flow down to the upper surface of the evaporator to be frozen. If this is done, it is possible to prevent a large decrease in the heat transfer coefficient due to freezing.

A compression type refrigerator and a chemical type refrigerator are combined, and a pipe on the discharge side of the compressor of the compression type refrigerator is branched and connected to a heat exchanger of a container containing a reaction material of the chemical type refrigerator. When the refrigerant discharged from the compression refrigerator is caused to flow into the heat exchanger, the condensation heat released to the outside by the condenser in the compression refrigerator can be used for heating in the container regeneration process. As a result, the efficiency is improved.

[0015]

DETAILED DESCRIPTION FIG. 1 is a configuration diagram of a first reference example of the refrigeration system of the present invention. In this reference example , quicklime, silica gel, zeolite and the like are used as a reactant, and a LiBr aqueous solution is used as a refrigerant.
It uses an aqueous solution of CaCl2, an aqueous solution of NaCl, or the like, and is connected to a first container 1 and a second container 2 containing reactants 3 and 4 by a pipe 16 having a valve 11 interposed in the first container 1. A condenser 7 for condensing the refrigerant 8 with a pipe, a pipe 16 connecting the valve 11 and the condenser 7 and a pipe 17 connecting the second container, a valve 12 interposed in the pipe 17,
A tank 23 filled with water 21 as a low-temperature heat medium, an evaporator 10 immersed in the water 21 of the tank 23 to evaporate the refrigerant 8 therein, and a liquid phase part of the evaporator 10 and the condenser 7 A pipe 19 communicating through a valve 15, a pipe 16 connecting the first vessel 1 and the valve 11 and the evaporator 10 through a valve 13, a pipe 18 communicating with the second vessel 2 and a valve 12; A pipe 20, which connects the pipe 17 between the evaporator 10 and the evaporator 10 via the valve 14, a tank 23, and the radiator 2
9 is connected, and a pipe 26 connects the other end of the radiator 29 and the tank 23 via the pump 24.

The valve 15 is for adjusting the amount of the refrigerant 8 in the condenser 7 flowing into the evaporator 10, but the apparatus operates even without the valve 15. The water 21 in the tank 23 can be circulated into the radiator 29 by the pump 24 and the pipes 25 and 26, whereby the heat of the water 21 is transported to the radiator 29 and used for cooling or the like. You. The first and second containers have reactants 3,
Remove heat from 4 (or remove heat from the container)
The heat exchangers 5 and 6 are provided, and the condenser 7 is also provided with a heat exchanger 9 for cooling and liquefying the refrigerant vapor.

The operation of the apparatus having the above structure for lowering the temperature of the water 21 will be described below. In the figure, white valves indicate open states, and black valves indicate closed states. The refrigerant 8 in the evaporator 10 removes the heat of the water 21 to evaporate and enters the second container 2 through the pipe 20 and the valve 14. The refrigerant vapor that has entered the second container 2 reacts with the reaction material 4 and is consumed, and the reaction material 4 generates heat by the reaction. Since the refrigerant vapor is consumed by this reaction, the pressure of the refrigerant vapor in the second container 2 is kept at a predetermined value, and the evaporation of the refrigerant in the evaporator is continued. The heat generated during the reaction is removed by a low-temperature heat medium (such as water or oil) introduced into a heat exchanger 6 provided in the second container 2. On the other hand, the reaction material 3 in the first vessel 1 is heated by a high-temperature heat medium (water or oil) introduced into the heat exchanger 5, whereby the refrigerant in the reaction material 3 is desorbed as vapor. This vapor enters the condenser 7 through the pipe 16 and the valve 11, and is cooled and condensed by the cooling heat medium (water) introduced into the heat exchanger 9;
It becomes the refrigerant liquid 8. This refrigerant liquid 8 returns to the inside of the evaporator 10 through the pipe 19 and the valve 15, and repeats the same cycle. Thereafter, the valves 11 and 14 are closed, and a low-temperature heat medium is caused to flow through the heat exchanger 5 in the first container 1 to cool the reaction material 3. On the other hand, the valve 12 is opened to heat the reaction material 4 by flowing a high-temperature heat medium into the heat exchanger 6 in the second vessel 2,
At this time, the vapor of the refrigerant generated from the reaction material 4 is supplied to the valve 12,
It is introduced into the condenser 7 through the pipes 17 and 16 to be condensed. Thereafter, when the valve 13 is opened, the refrigerant in the evaporator 10 evaporates, and the vapor generated at this time is supplied to the pipe 18 and the valve 1.
3 and enters the first container 1 and reacts with the reactant 3. The heat generated at this time is removed by flowing a low-temperature heat medium into the heat exchanger 5.

That is, while the reaction process (the process of consuming or adsorbing the refrigerant vapor) is being performed in the second container 2, the regeneration process (heating the reactant to remove the refrigerant vapor in the first container 1) is performed. To recover the reaction force of the reaction material), and then the second container 2 is switched to the regeneration process to perform the reaction process in the first container 1, and such operations are alternately performed. By doing so, the refrigerant 8 in the evaporator 10
Continuously evaporates to produce cold heat. This cools the water 21 around the evaporator 10 and surrounds it with crystals 22
Occurs. If such an operation is continued, the water 2 in the tank 23
1 can be crystallized, and if the tank 23 is made large, it can be used as a large-capacity regenerator. Also, if hot wastewater is used as a heat medium flowing through the heat exchangers 5 and 6, the water 21 in the tank 23 can be crystallized without using an electric compressor and a large amount of cold storage can be achieved. If used for daytime cooling, it can help reduce peak power.

FIG. 2 is a block diagram of the first embodiment of the present invention. This divides the evaporator into two and evaporator 10,
10a is immersed in a liquid 21. For this reason, the pipe 19 connected to the liquid phase part of the condenser 7 branches into two pipes 30 and 30a on the way, and the evaporators 10 and 1 are connected to the pipes 30 and 30a respectively.
0a, and valves 15, 15-a are provided in the middle of these pipes. The pipe 18 is connected to the evaporator 10a, and the pipe 20 is connected to the evaporator 10. Other configurations are the same as those of the first embodiment (the radiator 29, the pump 24, and the pipes 25 and 26 are not shown).

Also in this embodiment, the valves 11, 12,
By operating the valves 13, 14 and the valves 15, 15-a alternately, cold heat can be generated in the evaporators 10, 10a, around which crystals 22, 22-a can be produced. In this way, the inside of the tank 23 can be widely used for cold storage, and the liquid 21 can be crystallized quickly. Further, if separate pipes with valves are connected between the pipe 18 and the evaporator 10 and between the pipe 20 and the evaporator 10a, the evaporator 1
0 or can be operated solely by the evaporator 10a,
The evaporator can be maintained while the operation as the device is continued. Further, by using two evaporators, the surface area of the evaporator in contact with the liquid 21 can be increased.

FIG. 3 is a block diagram of a second embodiment of the present invention. This reference example, the shown here with the first reference example odor <br/> shown in 1, the first container 1, of another filled with reaction material or adsorbent 4a in addition to the second container 2 a The third container 2a is provided, a heat exchanger 6a is disposed therein, and a pipe 17 connecting the valve 12 and the pipe 16 is connected to the third container 2a by a pipe 17a interposed with the valve 12a. , Third
The pipe 17a between the vessel 2a and the valve 12a is connected to the gas phase of the evaporator 10 by a pipe 20a with a valve 14a interposed. Participation other configurations shown in FIG. 1
It is the same as the example.

In this embodiment , the valves 11, 12, 12a,
And the valves 13, 14, 14a are shifted in time,
By alternately opening and closing, the evaporator 10 is continuously operated.
The cooling medium can be generated by evaporating the refrigerant inside. By providing the third container 2a containing the reaction material 4-a with respect to the reference example of FIG. Thus, the performance of the reaction materials 3, 4, and 4a during the reaction can be improved.

FIG. 4 is a block diagram of a third embodiment of the present invention. The difference between this embodiment and the first embodiment is that a connecting portion (manifold) 31 for connecting the pipes 18 and 20 is provided instead of connecting the pipes 18 and 20 directly to the evaporator 10. Connecting part 31 and evaporator 1
0 is connected by a pipe 18a, and the evaporator 10 is formed of a bent pipe, and the inlet and the outlet of the pipe are pipe 1
9 and 18a. The other components are the same as in the first reference example . The connection part 31 prevents a part of the liquid from entering the containers 1 and 2 through the pipes 18 or 20 and directly adhering to the reactants 3 and 4 when the refrigerant in the evaporator 10 boils. It serves as a gas-liquid separator for If the bent tubular evaporator 10 shown in this reference example is widely disposed in the liquid 21 in the tank 23, the heat transfer area can be increased, and the liquid 2 can be efficiently discharged.
1 can be a crystal 22.

FIG. 5 is a block diagram of a second embodiment of the present invention. This embodiment is different from the first embodiment shown in FIG.
The evaporators 10 and 10a are formed in a thin box shape containing a refrigerant, and are arranged to be inclined above the tank 23. The lower ends of the evaporators are connected to the valves 15 and 15a by pipes 30 and 30a. The upper end is connected to valves 14 and 13 by pipes 20 and 18, and a pipe 41 having one end connected to the liquid phase portion of the tank 23, a pump 40 having a suction port connected to the other end of the pipe 41, A pipe 41A connected to a discharge port of the pump 40, pipes 42 and 43 branched and connected to the pipe 41A, a pipe 46 connected to the pipe 42 via a valve 44, and a pipe 43 A pipe 47 connected via a valve 45 is provided.
The end of 6 is located at the upper end of the outer surface of the evaporator 10, and the end of the pipe 47 is located at the upper end of the outer surface of the evaporator 10 a at a position where the liquid 21 is dropped. Also, the evaporators 10, 10
“a” is shaped such that its lower end is bent upward in a substantially L-shape. It is important to design the L-shape (the degree of bending) so that crystals generated on the surfaces of the evaporators 10 and 10a can easily fall down. Other configurations are the same as those of the first embodiment .

In this embodiment, the liquid 21 in the tank 23 is
Is dropped on the upper surfaces of the evaporators 10 and 10a by the pump 40, and the dropped liquid 21 is crystallized by the refrigerant evaporating in the evaporator, deprived of the heat of evaporation by the refrigerant (in the case where water is used as the liquid 21). Icing) and is stored cold. Evaporator 10,
The refrigerant 8 in the condenser 7 flows into the condenser 10a as appropriate, but the valve 13 or 14 is opened to open the first container 1 and the evaporator 1
When the evaporator 10 communicates with the evaporator 10 or the second container 2, the refrigerant 8 evaporates and the evaporator 10 or the evaporator 10a is cooled, and the liquid 21 flowing down the upper surface thereof crystallizes on the surface. Evaporator 10 or evaporator 1
When the crystallization of the liquid 21 on the outer surface of the evaporator 0a progresses to some extent and the evaporation of the refrigerant in the evaporator 10 or the evaporator 10a decreases, the pipes 30, 3 connected to the pipe 19
The valve 15 or the valve 15a of the portion 0a is opened, and the refrigerant 8 in the condenser 7 is discharged to the evaporator 10 or the evaporator
Flows into. Since the temperature of the inflowing refrigerant is high, a part of the crystal 22 grown on the evaporator 10 or the evaporator 10a is melted.
It falls using the slope of 0,10a. The crystal 22 or the crystal 22a that has fallen in this way is stored in the liquid 21 in the tank 23. Valves 11 and 12, Valve 1
By alternately switching the valves 3, 14, and the valves 15, 15a, crystals are grown and separated alternately on the surfaces of the evaporators 10, 10a, and crystals 22, 22a can be continuously produced. The supply of the refrigerant to the evaporator is performed not intermittently but intermittently. In a stage where the refrigerant is being evaporated, the refrigerant itself accumulated in the evaporator due to the evaporation of the refrigerant is itself. Is cooled, so that there is no danger that the crystals on the outer surface of the evaporator are melted and dropped by the heat of the refrigerant supplied from the condenser.

In this embodiment, the evaporators 10, 1
In order to positively drop the ice crystallized on the surface of the first container 1a, the vapor of the refrigerant generated at the time of regenerating the reactant 3 or 4 in the first container 1 or the second container 2 is supplied to the condenser 7a. What is necessary is just to introduce | transduce directly into the evaporators 10, 10a without passing through. At this time, steam may be flowed so as to flow through the pipe 18 or the pipe 20. Also, a branch pipe with a valve is attached to the pipe 16 or 17 so that the evaporator 1
The same can be done by connecting to 0, 10a.

Next, in a combination of a reactant (adsorbent) and a refrigerant used in a chemical refrigerator, cold heat of 0 ° C. or less is generated, the heat does not deteriorate in a heat cycle test, and the reactant (adsorbent) is used. The following is a description of experimentally finding a combination that easily removes adsorbate (refrigerant vapor) during heating and regeneration. Prepared Experimental Example 1] adsorber vessel (made of glass) having an internal volume of about 2000 cm ³ and the refrigerant container having an inner volume of 1000 cm ³ (made of glass), which in the chemical type refrigerating apparatus which is connected in valved pipes, in Table 1 Adsorbent A (pore volume 0.4 ml / g, adsorption surface area 720 m ² / g, average pore diameter 22 °, average particle diameter 2 to 4 m
m) in an adsorbent container, and about 0.25 kg of a lithium bromide aqueous solution (10 wt%) shown in Table 2 as a refrigerant in a refrigerant container, and evacuating each container at room temperature.
Open the valve on the pipe,

[0028]

[Table 1]

[0029]

[Table 2] The refrigerant is introduced into the adsorbent container side through the pipe and adsorbent A
Was adsorbed. The temperature of the refrigerant in the refrigerant container rapidly decreased after the start of the experiment, and reached a minimum temperature of -17 ° C after about 1.5 hours.

The same experiment was carried out 1000 times, but the temperature of the refrigerant reached about −17 ° C. even in the final experiment, and there was almost no change from the initial stage. When the regeneration temperature of this system was measured during the heat cycle test, it was found that the temperature was 50 ° C to 8 ° C.
It was found that regeneration was possible at a relatively low temperature of 0 ° C. [Experimental Example 2] A similar experiment was performed using the same apparatus as in Experimental Example 1 except that the concentration of the aqueous solution of lithium bromide as the refrigerant was changed to 50 wt% among the conditions of Experimental Example 1. The temperature of the refrigerant reached about -2 ° C. The same experiment was performed 1000 times, but it was confirmed that the temperature of the refrigerant was about −2 ° C. in the final round, which was almost the same as the initial temperature. Further, when the regeneration temperature of this system was measured in the course of the heat cycle test, it was found that regeneration was possible at a relatively low temperature of 50 ° C. to 80 ° C.

An experiment for generating cold heat was conducted by changing the type and concentration of the refrigerant with respect to silica gel A, and the results are shown in Table 2. As a refrigerant, an aqueous solution of lithium bromide, an aqueous solution of calcium chloride, an aqueous solution of sodium chloride, an aqueous solution of magnesium chloride, an aqueous solution of ethylene glycol, an aqueous solution of propylene glycol, an aqueous solution of polyethylene glycol, E181 (tetramethyl glycol dimethyl ether)
ra ethylene glycol), E141 (Diethylene ether of diethlene
glycol), DMF (dimethylformamide)
As a result of conducting experiments on orm amide), a low temperature of 0 ° C. or less can be generated, it can withstand 1000 heat cycle tests, and the regeneration temperature is 50 ° C. to 80 ° C.
Was relatively low.

In a similar experiment, silica gel B (pore volume: 0.6 ml / g, adsorption surface area: 590 m ² / g, average pore diameter: 40
Å, average particle size 0.5 to 2 mm), and zeolite 13X
(Pore volume 0.35ml / g, adsorption surface area 500-700m
/ G, average pore diameter 10 mm, average size diameter, 1.5 mm × length 5 mm), a low temperature of 0 ° C. or less was able to be generated, and it was confirmed that the material could withstand 1000 heat cycle tests. .

However, as shown in Table 3, the regeneration temperature is as low as about 50 ° C. to 80 ° C. for silica gels A and B, but is required to be 150 ° C. or more for zeolite 13X. all right.

[0034]

[Table 3]

According to the refrigerating apparatus of the present invention, it is possible to generate cold heat of 0 ° C. or less in the evaporator while immersed in the tank, and to easily crystallize the liquid around the evaporator. made, both became to allow the heat storage of large capacity
In addition, there is an effect that it is easy to control the amount of generated cold .

According to the refrigeration apparatus of the present invention, the evaporator generates cold heat of 0 ° C. or less.
That the liquid flowing down to the surface can be solidified and stored cold
In both cases, the solidified liquid on the evaporator must be dropped as appropriate.
Of the heat transfer coefficient due to solidification of the liquid
Can be suppressed .

[Brief description of the drawings]

FIG. 1 is a system diagram showing a configuration of a main part of a first reference example of the present invention.

FIG. 2 is a system diagram showing a configuration of a main part of the first embodiment of the present invention.

FIG. 3 is a system diagram showing a configuration of a main part of a second reference example of the present invention.

FIG. 4 is a system diagram showing a configuration of a main part of a third reference example of the present invention.

FIG. 5 is a system diagram showing a configuration of a main part of a second embodiment of the present invention.

[Explanation of symbols]

 1, 2 container 3, 4 reaction material 5, 6, 9 heat exchanger 7 condenser 8 refrigerant 10, 10a evaporator 21 liquid 22 crystal 23 tank 24 pump 29 radiator 31 connecting part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-138665 (JP, A) JP-A-4-148163 (JP, A) JP-A-6-193993 (JP, A) JP-A-4-193 236076 (JP, A) Table 6-502715 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25B 17/08

Claims (2)

(57) [Claims] 1. A plurality of containers accommodating a reactant and provided with heat exchange means, a condenser connected to each of the plurality of containers via a valve for condensing refrigerant vapor generated in the containers, An evaporator connected to the evaporator to evaporate the refrigerant therein, a tank equipped with the evaporator and immersed in the liquid in the tank, the evaporator and the plurality of containers each having a valve. A refrigerant that is not solidified at 0 ° C. in the condenser and the evaporator, the pipe including a pipe connected to connect the refrigerant vapor generated in the evaporator to the container, and a heat utilization unit provided in the tank. Tomo and There has been sealed
In addition, there are two or more evaporators, a condenser and each evaporator.
The refrigeration apparatus is connected to the vessel via a valve . 2. A plurality of containers accommodating a reactant and provided with heat exchange means, a condenser connected to each of the plurality of containers via a valve to condense refrigerant vapor generated in the containers, and An evaporator connected to the vessel via a valve to evaporate the refrigerant inside the vessel, a tank disposed below the evaporator to store the liquid, and a means for flowing the liquid in the tank to the surface of the evaporator. A pipe that connects the evaporator and each of the plurality of containers via a valve and guides the refrigerant vapor generated by the evaporator to the container, and heat utilization means provided in the tank, A refrigeration system in which a refrigerant that does not solidify at 0 ° C. is sealed in the condenser and the evaporator.