JP2734343B2 - Vacuum ice making equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum ice making apparatus for efficiently generating, storing or transporting cold and hot heat, for example, in a center plant of a district heating and cooling system or various manufacturing industries.

[0002]

2. Description of the Related Art The following prior art is known as a device for making ice or producing and storing heat or cold. (1) Mechanical compression refrigerator or heat pump using chlorofluorocarbon as a refrigerant, for example, “Industrial heat pump” [Akiichi Takada et al., Energy Conservation Center (hereinafter referred to as Document 1)]. Is disclosed. According to this method, by supplying electricity or mechanical work, it is possible to produce or supply freezing, ice making, or heat.

(2) Vacuum refrigeration system (absorption type) A vacuum refrigeration system is a refrigeration system using evaporative cooling, and uses an absorption heat pump as an exhaust means. For example, as shown in FIG. 6, since the inside of the evaporator 81 is decompressed and a part of the contained water evaporates and the latent heat of evaporation is taken away, the heat exchanger provided inside the evaporator 81 is used. Cold heat is collected at 82 and this cold heat is supplied outside the system.

An internal heat source 93 and an external heat source 94 are used to reduce the pressure inside the evaporator 81. That is, the absorber 83 connected to the evaporator 81
Then, the inside of the evaporator 81 is depressurized by introducing water vapor generated in the evaporator 81 and spraying the absorbent from the nozzle 84 to absorb the water vapor into the absorbent. The heat generated when the water vapor is absorbed by the absorbent is recovered by a heat exchanger 85 provided inside the absorber 83.

[0005] The absorbent that has absorbed the water vapor passes through a heat exchanger 86 from an absorber 83 and enters a nozzle 88 inside a regenerator 87.
Sprayed from. The regenerator 87 regenerates the absorbent by heating the absorbent with an external heat source 94 to release the water vapor absorbed by the absorbent. The regenerated high-temperature absorbent is exchanged with the low-temperature absorbent from the absorber in the heat exchanger 86, and then returned to the absorber 83.

On the other hand, the steam released by the regenerator 87
It is introduced into the condenser 89 and cooled and condensed by the heat exchanger 90 provided therein. Obtained condensed water 91
Is returned to the evaporator 81 via the pipe 92.

Here, cooling water is sequentially supplied from an external cold heat source 93 to heat exchangers 85 and 90 provided inside the absorber 83 and the condenser 89. Further, instead of providing the evaporator 81 and the heat exchanger 82 for recovering cold energy, water is housed inside, and the inside is depressurized by the absorber 83, and a part of the housed water evaporates to form ice. Also, it has been developed to provide an ice-making tank for storing the ice, and to supply the ice from the ice-making tank to a cold heat demand destination.

Another example of a vacuum ice making device is described in Japanese Patent Application Laid-Open No. 63-243665. In this vacuum ice making device, a path through which chlorofluorocarbon is circulated as a heat medium is formed between the absorber and the concentrator (corresponding to the above-mentioned regenerator 88). An expansion valve is provided between the heat exchanger and a compressor heat pump cycle that provides a compressor between the heat exchanger in the absorber and the heat exchanger in the regenerator to regenerate cold heat in the absorber. Heat is supplied to each vessel.

[0009]

For example, when using heat in a district cooling and heating system, it is conceivable that cold heat is supplied from a cold storage or ice making device and, at the same time, waste heat discharged during ice making or cold storage is used. Can be

In the conventional (absorption type) vacuum refrigerating apparatus shown in FIG. 6, the refrigerant discharged through the absorber 83 and the condenser 89 is supplied to the absorber 83 with the steam from the evaporator 81 and the coagulator. Since the steam is heated by the heat of the steam from the regenerator 87 at 89, it is conceivable to supply the steam to a heat demand destination to recover and reuse the heat of the external heat source supplied to the regenerator 87. However, the temperature of the refrigerant discharged from the condenser 89 is about 30 to 35 ° C., which is too low for reuse.

Further, in the vacuum ice making apparatus described in the above-mentioned Japanese Patent Application Laid-Open No. 63-243665, as described above, a compression heat pump cycle in which chlorofluorocarbon is circulated between the absorber and the regenerator is formed. The heat generated by the absorption of water vapor in the absorber is used as a heat source in the regenerator. For this reason, it is not possible to supply warm heat using exhaust heat discharged from the absorber. Further, in this vacuum ice making device, ice cannot be made unless the compressor is driven by electric or mechanical energy to operate the compression heat pump cycle. Further, since chlorofluorocarbon is used as the heat medium of the compression heat pump cycle, leakage of chlorofluorocarbon may adversely affect the environment. The present invention has been made in view of the above, and provides a vacuum ice making device capable of supplying hot heat simultaneously with ice making and cold storage.

[0012]

SUMMARY OF THE INVENTION The present invention relates to an ice making tank for making ice by evaporating a part of water contained therein by depressurizing the inside and storing the made ice.
An absorber that introduces water vapor generated in the ice making tank and absorbs the absorbed water into the ice making tank, thereby reducing the pressure inside the ice making tank and recovering the heat generated by the absorption of the water vapor by a heat exchanger provided inside. A regenerator for introducing the absorbent from the absorber and heating by an external heat source to release water vapor from the absorbent to regenerate the absorbent and supply the regenerated absorbent to the absorber ,and,
A vacuum ice making device comprising a first condenser for introducing steam released by the regenerator and cooling and condensing the steam with a heat exchanger provided therein, wherein the refrigerant is cooled by evaporation under reduced pressure. A gas-liquid separator, a refrigerant line for sequentially or separately circulating the refrigerant from the gas-liquid separator to the heat exchanger provided inside the absorber and the first condenser, from the gas-liquid separator A compressor that sucks and compresses the refrigerant vapor, cools the refrigerant vapor compressed by the compressor with a heat exchanger provided therein to condense the refrigerant vapor, and discharges the obtained refrigerant into the gas Second return to the liquid separator
A vacuum ice making device comprising: a condenser; and a heat supply line for supplying heat obtained by the heat exchanger provided inside the second condenser to a heat demand destination. Hereinafter, it is referred to as a first vacuum ice making device).

Further, the present invention provides an ice making tank for storing ice produced by making ice by evaporating a part of water contained by depressurizing the inside, and introducing steam generated in the ice making tank. The inside of the ice making tank is decompressed by absorbing it with an absorbent, and the heat exchanger provided inside recovers the heat generated by the absorption of the water vapor, and the absorbent from the absorber. Introduced and heated by an external heat source to release water vapor from the absorbent to regenerate the absorbent, and to supply the regenerated absorbent to the absorber; A vacuum ice making device comprising a first condenser for introducing the steam and cooling and condensing the steam with a heat exchanger provided therein, wherein the gas-liquid separator cools the refrigerant by evaporation under reduced pressure. , The refrigerant A first refrigerant line circulated between the gas-liquid separator and the heat exchanger provided inside the absorber, and a second refrigerant line circulated through a heat exchanger provided inside the first condenser. Refrigerant line, a compressor that sucks and compresses refrigerant vapor from the gas-liquid separator, cools the refrigerant vapor compressed by the compressor with a heat exchanger provided therein, and condenses the refrigerant vapor, And a second condenser for returning the obtained refrigerant to the gas-liquid separator, and a heat supply for supplying heat obtained by the heat exchanger provided inside the second condenser to a heat demand destination A vacuum ice making device comprising a line is provided (hereinafter, referred to as a second vacuum ice making device).

According to the present invention, an ice making tank is provided in which ice is produced by evaporating a part of water contained by depressurizing the inside and storing the produced ice, and a steam generated in the ice making tank is introduced. An absorber for decompressing the inside of the ice making tank by absorbing the water vapor and recovering the heat generated by the absorption of the water vapor by a heat exchanger provided therein; and Introduce the agent,
A vacuum ice making device comprising a regenerator that regenerates the absorbent by releasing water vapor from the absorbent by heating with an external heat source and supplies the regenerated absorbent to the absorber, wherein the evaporator is vacuum-evaporated. A gas-liquid separator for cooling the cooling water, a cooling water line for circulating the cooling water between the gas-liquid separator and the heat exchanger provided inside the absorber, and steam from the gas-liquid separator. A compressor for sucking and compressing, a steam pipe for introducing the steam discharged from the regenerator upstream or downstream of the compressor, and a heat exchange provided inside the steam compressed by the compressor. A condenser that condenses the water vapor by cooling in a heat exchanger and returns the condensed water to the gas-liquid separator, and circulates from the gas-liquid separator to the heat exchanger provided inside the absorber. Part of the cooling water A vacuum ice making device comprising: a branch pipe for supplying an ice making tank; and a heat supply line for supplying heat obtained by the heat exchanger provided inside the condenser to a heat demand destination. (Hereinafter, referred to as a third vacuum ice making device).

Hereinafter, the vacuum ice making device of the present invention will be described in more detail. The vacuum ice making device of the present invention includes an ice making tank that stores water and ice that has been made. Decompression inside the ice-making tank introduces water vapor generated in the ice-making tank into the absorber,
This is performed by absorbing water vapor into an absorbent. In the depressurized ice making tank, ice is produced by evaporating part of the contained water and removing latent heat. The inside of the ice making tank is depressurized below the triple point pressure of water. As the absorbent, lithium bromide, lithium chloride, calcium chloride,
Use of a substance having a large boiling point difference with water and a high solubility in water, such as magnesium chloride or other salts or a mixture thereof, or an acid or alkali such as sulfuric acid or sodium hydroxide, in the form of an aqueous solution. Can be.

A heat exchanger is provided inside the absorber, and recovers the heat generated when the absorbent absorbs water vapor. The regenerator is introduced with a low concentration absorbent that has absorbed water vapor from the absorber. The introduced absorbent is heated by an external heat source, and releases water vapor absorbed by the absorbent to be concentrated. As the external heat source, waste heat of about 90 to 150 ° C. discharged from equipment outside the system can be used.

A first condenser is provided downstream of the regenerator, and the steam discharged from the regenerator is introduced. In the first condenser, steam is cooled and condensed by a heat exchanger provided inside. The obtained condensed water may be returned to the ice making tank and reused as ice making water.

In order to circulate the refrigerant through the heat exchanger provided inside the absorber and the first condenser, in the first vacuum ice making device, the gas-liquid separator is used to remove the refrigerant from the inside of the absorber and the first condenser. A refrigerant line that is circulated sequentially or separately to the heat exchanger provided in the radiator is formed. Freon or cooling water is used as the refrigerant. The gas-liquid separator connected to the refrigerant line cools the refrigerant by evaporation under reduced pressure. The compressor is connected to the gas-liquid separator. The compressor draws refrigerant vapor and compresses the refrigerant vapor. As a result, the temperature of the refrigerant vapor is increased by increasing the pressure.

The high-temperature refrigerant vapor compressed by the compressor is introduced into the second condenser, and is cooled and condensed by the heat exchanger provided therein. The condensed refrigerant is returned to the gas-liquid separator. Then, the heat obtained by the heat exchanger provided inside the second condenser is supplied to the heat demand destination via the heat supply line. As a result, the compression heat pump
After sufficiently raising the heat recovered by the absorber and the second condenser, the heat can be supplied to a heat demand destination.

In the second vacuum ice making device, a first refrigerant line for circulating the refrigerant between the gas-liquid separator and the absorber is formed. On the other hand, a second refrigerant line for separately circulating the refrigerant is formed in the first condenser. In this case, similarly to the first vacuum ice making device, the heat recovered by the absorber by the compression heat pump is sufficiently raised. In the second refrigerant line, the refrigerant may be simply circulated to condense the water vapor, or another heat demand destination may be connected to the second refrigerant line to supply the heat. In this case, since the refrigerant flowing through the first condenser is circulated and supplied to the heat demand destination as it is to supply the heat, the external heat source is used so that the exhaust heat of the first condenser can be directly used as the heat. It is preferable to supply a material having a temperature slightly higher than the above case.

In the third vacuum ice making device, cooling water is used as a refrigerant, the condenser on the regenerator side (the above-described first condenser) is omitted from the vacuum ice making device, and the steam flowing out of the regenerator is removed. Is sent upstream or downstream of the compressor. In this case, since water for ice making in the ice making tank becomes scarce, a branch pipe for returning a part of the cooling water supplied from the gas-liquid separator to the heat exchanger provided inside the absorber to the ice making tank. It is necessary to provide.

When returning the steam flowing out of the regenerator to the downstream side of the compressor, the power required for the compressor can be reduced by utilizing the heat of the steam flowing out of the regenerator. In this case, it is preferable to increase the temperature of the external heat source (drive heat source) supplied to the regenerator and increase the pressure of steam flowing out of the regenerator to supply the steam to the outlet side of the compressor.

[0023]

Embodiments of the present invention will be described below in detail with reference to the drawings. Embodiment 1 FIG. 1 is an overall configuration diagram showing an example of a vacuum ice making device of the present invention.

In FIG. 1, reference numeral 11 denotes an ice making tank for containing water 12 for making ice. Above the ice making tank 11, there is provided a duct 14 for connecting the gas phase inside the ice making tank 11 to the absorber 13.

Inside the absorber 13, a nozzle 15 for spraying a concentrated aqueous solution of lithium bromide as an absorbent and a heat exchanger 16 are provided. Further, the absorber 13 is provided with a vacuum pump 17 for preventing accumulation of non-condensable gas contained in water vapor, so that the degree of vacuum in the absorber 13 is maintained.

At the bottom of the absorber 13, a pump 19 for transferring the absorbent to the heat exchanger 18 for the absorbent is connected. On the discharge side of the low-concentration absorbent of the absorbent heat exchanger 18, a nozzle 21 for spraying the absorbent after heat exchange inside the regenerator 20 is connected. In the regenerator 20, an in-regenerator heat exchanger 23 through which a heat source 22 supplied from an external facility is passed is disposed. A pipe 24 for introducing the regenerated absorbent into the heat exchanger for absorbent 18 is connected to the bottom of the regenerator 20. The high-temperature and high-concentration absorbent from the regenerator 20 is subjected to heat exchange with the low-temperature and low-concentration absorbent from the absorber 13 in the absorbent heat exchanger 18, and then the above-described nozzle 15 is discharged. From the inside of the absorber 13.

The gas phase portion of the regenerator 20 is
It is connected to the. A heat exchanger 26 is provided inside the first condenser 25. A pipe 28 for returning the condensed water 27 to the ice making tank 11 is connected to the bottom of the first condenser 25.

In the heat exchangers 16 and 26 provided inside the absorber 13 and the first condenser 25 described above, a refrigerant line 30 through which cooling water is sequentially circulated as a refrigerant from a gas-liquid separator 32 is formed. Have been. The coolant line 30 is provided with a pump 31 for circulating cooling water.
In addition, for example, chlorofluorocarbon can be used as the refrigerant.

A compressor 33 is connected to the gas-liquid separator 32, and a second condenser 35 is provided downstream of the compressor 33 via a pipe 34. A heat medium (water) is supplied to the second condenser 35 via a pipe 37 by a pump 36 to a heat exchanger provided inside the second condenser, and a heat medium (water) from which heat is recovered is supplied to the second condenser 35. A heat supply line for supplying to the heat demand side is formed.

A pipe 38 for returning condensed water to the gas-liquid separator 32 is connected to the downstream side of the second condenser 35. On the other hand, the ice making tank 11 is connected with a pump 41 for taking out the generated ice water slurry and supplying it to the slurry transport loop 40 arranged on the cold heat demand side.

Next, the operation when the vacuum ice making apparatus 10 having the above-described configuration is operated as cold heat supply equipment will be described. Ice cold storage operation: A hot heat source 22 (steam at 90 to 100 ° C.) flows through the heat exchanger 23 in the regenerator from a state in which the ice making tank 11 is filled with cold water. On the other hand, cooling water (25 ° C. or less)
Through the refrigerant line 30. In addition, the pump 19 is operated to start circulation of the absorbent. Thereby, the pressure inside the absorber 13 is gradually reduced. The pressure inside the absorber 13 is reduced to a pressure slightly lower than the triple point pressure of water (about 4.6 mmHg) (for example, 4.0 mmHg).
The pressure inside the absorber 13 decreases as the temperature of the cooling water decreases.

As the pressure in the absorber 13 is reduced, the water 12 in the ice maker 11 boils near the water surface, and the pressure and water pressure in the ice maker 11 decrease. When the water temperature becomes 0 ° C. and the pressure becomes about 4.6 mmHg, the decrease in temperature and pressure stops, but from this point on, ice particles are formed in the water.

Cold heat supply operation: The cold heat stored in the ice making tank 11 in the above ice making cold storage operation is sent to a slurry circulation loop 42 by a pump 41 in order to directly supply the cold heat demand in the form of ice water slurry. It is.

The above-mentioned ice making cold storage operation and cold heat supply operation can be performed in different time zones, but they can also be performed in an overlapping manner. Heat supply operation: When performing the above-mentioned ice cold storage operation, the heat supply is performed as follows.

High-temperature (30 to 35 ° C.) cooling water from a heat exchanger 26 provided inside the first condenser 25 is introduced into a gas-liquid separator 32 provided in a refrigerant line 30. Then, the cooling water is flashed under reduced pressure to generate steam. After the steam is sucked and compressed by the compressor 33 from the gas-liquid separator 32, the steam is introduced into the second condenser 35 via the pipe 34. In this embodiment, the pressure on the inlet side of the compressor 33 is 24 mmHg, and the pressure on the outlet side is 100 mmHg.
g.

In the second condenser 35, steam is supplied to a pump 36.
It cools and condenses with the heating medium (water) (40-45 degreeC) supplied by (1). The heated heat medium (water) (about 50 ° C.) is supplied via a pipe 37 to a heat demand destination. On the other hand, the generated condensed water is returned to the gas-liquid separator 32 via the pipe 38.

As described above, according to the vacuum ice making device 10, it is possible to supply the heat of about 50.degree. In the above-described embodiment, the gas-liquid separator 3 is connected to the refrigerant line 30 that sequentially circulates through the absorber 13 and the first condenser 25.
Although the case in which the cooling water line 2 is provided has been described, the refrigerant line may be one in which cooling water is separately passed from the gas-liquid separator 32 to the absorber 13 and the first condenser 25.

As shown in FIG. 2, a separate type ice making tank 50 comprising an evaporating vessel 51 and a cold storage tank 52 can be used instead of the above-mentioned integrated ice making tank 11.
In this case, since the above-described integrated ice making tank 11 must be entirely constituted by a vacuum pressure-resistant container, a large size is disadvantageous in terms of equipment cost. However, in the latter separate type ice making tank 50, it is sufficient that only the evaporating container 51 is constituted by a vacuum pressure-resistant container, and the regenerator 52 can be opened to the atmosphere.
It is excellent in that equipment costs can be reduced.

Embodiment 2 Next, a second embodiment of the vacuum ice making device of the present invention will be described with reference to FIG. In the vacuum ice making device 60 of the present embodiment, the refrigerant is supplied to the heat exchanger 1 inside the absorber provided inside the absorber 13.
A refrigerant line 61 that circulates through only 6 is formed.
A pump 62 is provided in the refrigerant line 61. Refrigerant is supplied to the refrigerant line 61 from the gas-liquid separator 32. On the other hand, in the first condenser 25, a second refrigerant line 64 for circulating the refrigerant to the heat exchanger 26 provided inside the first condenser 25 by the pump 63 is formed.
The exhaust heat from the condenser 25 can be supplied to a heat demand destination.

The vacuum ice making device 60 having the above-described configuration is used.
In this case, when a low-pressure steam of 110 to 120 ° C. is supplied as the heat source 22 to perform the ice cold storage operation, the heat medium of 25 to 30 ° C. is discharged from the heat exchanger 16 in the absorber. The heated heat medium can be supplied to the heat supply operation in the gas-liquid separator 32, the compressor 33, and the second condenser 35 in the same manner as in the first embodiment. On the other hand, in the heat exchanger 26 in the regenerator, the cooling water is heated to about 50 ° C., and is supplied to the second heat demand destination via the second refrigerant line 64.

The heat obtained from the regenerator-side condenser 25 may be simply dissipated to the outside world. Third Embodiment Next, a third embodiment of the vacuum ice making device of the present invention will be described with reference to FIG.

In the vacuum ice making device 70 of the present embodiment, the first condenser 25 in the vacuum ice making device 60 of the second embodiment is omitted, and the steam generated in the regenerator 20 from the top of the regenerator 20 is compressed. A steam pipe 71 leading to the upstream side of 33 is provided.

On the other hand, the cooling water is supplied to the heat exchanger 16 of the absorber 13.
A cooling water line 72 that allows water to pass through is formed. A pump 73 is provided in the cooling water line 72. Cooling water is supplied to the cooling water line 72 from the gas-liquid separator 32.

Further, a branch pipe 74 provided with an on-off valve 75
Are connected so as to be branched from the cooling water line 72 and connected to the ice making tank 11. Vacuum ice making device 70 of the present embodiment
Then, using water as the heat medium of the compression heat pump,
The ice making heat storage operation and the heat supply operation are performed. A heat source 22 (90 to 1) is provided to the heat exchanger 23 in the regenerator 20 of the regenerator 20.
00 ° C steam).

According to the vacuum ice making apparatus 70 of this embodiment having such a configuration, since water is used as the heat medium of the compression heat pump, the steam from the gas-liquid separator 32 and the steam from the regenerator 20 are used. Can be mixed and supplied to the compressor 33. As a result, the first condenser 25 in the first and second embodiments can be omitted. In this case, the water flowing sequentially through the ice making tank 11, the absorber 13, the heat exchanger 18, and the regenerator 20 becomes deficient, so the heat exchange in the regenerator through the cooling water line 72 from the gas-liquid separator 32. It is necessary to return a part of the cooling water supplied to the vessel 16 to the ice making tank 11 through the branch pipe 74.

Fourth Embodiment Next, a fourth embodiment of the vacuum ice making device of the present invention will be described with reference to FIG. In the vacuum ice making device 80 of the present embodiment, the first condenser 2 in the vacuum ice making device 60 of the second embodiment described above is used.
5 is omitted in common with the vacuum ice making apparatus 70 of the third embodiment, but by supplying low pressure steam of 110 to 120 ° C. as the heat source 22, 100 mmH
g or more of steam is generated, so that the steam can be directly supplied to the downstream side of the compressor 33 via the steam pipe 81.

According to the vacuum ice making device 80 of the present embodiment, the temperature of the supply heat source needs to be increased, but the required power of the compressor 33 is larger than that of the vacuum ice making device 70 of the third embodiment. Can be reduced.

[0048]

As described above, according to the first vacuum ice making device of the present invention, the exhaust heat of the cooling water circulating in the absorber of the endothermic refrigerator capable of making ice or the condenser on the regenerator side. Since it is equipped with a compression heat pump that utilizes refrigeration, it is possible to supply hot heat together with ice making and cold storage.

According to the second vacuum ice making apparatus of the present invention, it is necessary to supply a refrigerant of 25 ° C. or less to the absorber for the ice making operation. Since the refrigerant can be cooled by the gas-liquid separator and supplied to the heat exchanger provided inside the absorber, there is no need to supply the refrigerant from outside.

Further, according to the third vacuum ice making device of the present invention, the condenser on the regenerator side is omitted by using water as the refrigerant of the compression heat pump, and the steam flowing out of the regenerator is compressed. By using the heat pump, equipment costs can be reduced and a CFC-free system can be provided.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing a vacuum ice making device according to a first embodiment.

FIG. 2 is an overall configuration diagram showing the vacuum ice making apparatus of the embodiment in which the ice making tank is separated into an evaporating container and a cold storage tank.

FIG. 3 is an overall configuration diagram showing a vacuum ice making device according to a second embodiment.

FIG. 4 is an overall configuration diagram showing a vacuum ice making device according to a third embodiment.

FIG. 5 is an overall configuration diagram showing a vacuum ice making device according to a fourth embodiment.

FIG. 6 is an overall configuration diagram showing a conventional vacuum refrigeration apparatus.

[Description of Signs] 10, 60, 70, 80: vacuum ice making device, 11: ice making tank, 13: absorber, 18: heat exchanger for absorbent, 20: regenerator, 25: first condenser, 30, 61 ... refrigerant line, 3
2: gas-liquid separator, 33: compressor, 35: second condenser, 7
2. Cooling water line.

Claims (3)

(57) [Claims] 1. An ice making tank for storing ice produced by evaporating a part of the water contained therein by depressurizing the inside and storing the ice made, and introducing the water vapor generated in the ice making tank to an absorbent. An absorber for decompressing the inside of the ice making tank by absorbing the water and recovering the heat generated by the absorption of the water vapor by a heat exchanger provided inside; introducing the absorbent from the absorber and externally A regenerator that regenerates the absorbent by releasing water vapor from the absorbent by heating with a heat source and supplies the regenerated absorbent to the absorber; and introducing the vapor released by the regenerator A vacuum ice making device comprising a first condenser for cooling and condensing the water vapor with a heat exchanger provided therein, wherein a gas-liquid separator for cooling a refrigerant by evaporating under reduced pressure; Gas-liquid content A refrigerant line for sequentially or separately circulating a heat exchanger provided inside the absorber and the first condenser from a separator; a compressor for sucking and compressing a refrigerant vapor from the gas-liquid separator; A second condenser that cools the refrigerant vapor compressed by a machine with a heat exchanger provided therein to condense the refrigerant vapor, and returns the obtained refrigerant to the gas-liquid separator; and A vacuum ice making device, comprising: a heat supply line that supplies heat obtained by the heat exchanger provided inside the second condenser to a heat demand destination. 2. An ice-making tank for making ice by evaporating a part of water contained by depressurizing the inside and storing the ice-made ice, and introducing the water vapor generated in the ice-making tank to absorb the water. Absorber for decompressing the inside of the ice making tank by absorbing the water, and recovering the heat generated by the absorption of the water vapor in a heat exchanger provided inside, Introducing the absorbent from the absorber, By heating with an external heat source, water vapor is released from the absorbent to regenerate the absorbent, and a regenerator for supplying the regenerated absorbent to the absorber, and water vapor released by the regenerator A first condenser for introducing and cooling and condensing the water vapor with a heat exchanger provided therein; a gas-liquid separator for cooling a refrigerant by evaporation under reduced pressure; The gas liquid A first refrigerant line circulating between the heat exchanger provided inside the separator and the absorber, a second refrigerant line circulating the refrigerant through a heat exchanger provided inside the first condenser, A compressor for sucking and compressing the refrigerant vapor from the gas-liquid separator, cooling the refrigerant vapor compressed by the compressor with a heat exchanger provided therein to condense the refrigerant vapor, and obtaining A second condenser that returns the refrigerant to the gas-liquid separator, and a heat supply line that supplies heat obtained by the heat exchanger provided inside the second condenser to a heat demand destination. A vacuum ice making device. 3. An ice making tank for making ice by evaporating a part of the water contained by evacuation of the inside and storing the ice made, and absorbing the water vapor generated in the ice making tank to absorb the water. The pressure inside the ice making tank is reduced by absorbing the water, and an absorber that recovers the heat generated by the absorption of the water vapor by a heat exchanger provided therein, and the absorbent is introduced from the absorber. A vacuum ice making apparatus comprising a regenerator for regenerating the absorbent by releasing water vapor from the absorbent by heating with an external heat source and supplying the regenerated absorbent to the absorber; A gas-liquid separator for cooling the cooling water by evaporation; a cooling water line for circulating the cooling water between the gas-liquid separator and the heat exchanger provided inside the absorber; water vapor A compressor for sucking and compressing, a steam pipe for introducing the steam released by the regenerator upstream or downstream of the compressor, a heat exchange provided inside the steam compressed by the compressor A condenser that condenses the water vapor by cooling in a heat exchanger and returns the obtained condensed water to the gas-liquid separator; and circulates from the gas-liquid separator to the heat exchanger provided inside the absorber. A branch pipe that supplies a part of the cooling water to the ice making tank; and a heat supply line that supplies heat obtained by the heat exchanger provided inside the condenser to a heat demand destination. A vacuum ice making device.