JPH1123084A - Absorption refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce size of an absorber by raising temperature of an absorbent medium at an outlet of the absorber. SOLUTION: Two absorption refrigerators are combined to constitute a dual refrigeration cycle wherein one of the refrigerators functions as a high temperature side refrigerator 10H and the other functions as a low temperature side refrigerator 10L. A condenser 12L of the low temperature side refrigerator 10L is cooled by cold produced by an evaporator 13H of the high temperature side refrigerator 10H. A lithium aqueous solution is used as an absorbent medium of the high temperature side refrigerator 10H and sulfuric acid is used as an absorbent medium of the low temperature side refrigerator 10L.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption refrigeration apparatus, and more particularly to a reduction in the size of an absorber.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Patent Publication No. 5-28752, an absorption refrigeration system is provided with a generator, an absorber, an evaporator, and a condenser. Is input to generate cold heat in the evaporator.

Further, a binary refrigeration cycle is constituted by combining the above two absorption refrigeration units, one of which is a high-temperature refrigerator and the other is a low-temperature refrigerator, and the evaporators of the high-temperature refrigerator and the low-temperature refrigerator are constituted. Some use the cold generated in the above. In the two-way refrigeration cycle, the high-temperature refrigerant generated by the generator of the high-temperature refrigerator is used to heat the absorption medium in the generator of the low-temperature refrigerator to regenerate the absorption medium. Is condensed. That is, in the two-way refrigeration cycle, the heat of condensation generated when the high-temperature refrigerant of the high-temperature refrigerator is condensed is used in the generator of the low-temperature refrigerator.

As shown in FIG. 5, the operation of the absorption refrigeration cycle is as follows: the absorption medium absorbs water vapor in the absorber, changes the state from 1 to 2, and then is heated in the generator to change the state from 3 to 2. While changing to the state of 4, the steam generated in the generator is condensed in the condenser and 6
After being evaporated into water in the evaporator to form water vapor in the state of 5, the water is absorbed by the absorbing medium in the absorber.

[0005]

However, in the above-described two-way refrigeration cycle, both the high-temperature refrigerator and the low-temperature refrigerator conventionally use an aqueous solution of lithium bromide as an absorption medium, while the condensation of the high-temperature refrigerator is performed. Since only the heat is used for the generator of the low-temperature refrigerator, the size of the entire apparatus could not be reduced.

That is, when the above-mentioned aqueous solution of lithium bromide is used, the concentration of the absorbing medium cannot be set so high because the crystallization line (X) exists. For this reason, since the exhaust heat temperature in the absorber does not become so high (for example, 37 ° C. to 47 ° C.), a water cooling system using a cooling tower has to be adopted. Will do.

Therefore, it is conceivable to use sulfuric acid as the absorbing medium. This sulfuric acid can be used at a high concentration because there is no crystallization line (X).

However, the above sulfuric acid cannot be directly applied to a conventional binary refrigeration cycle because of its strong corrosiveness to metals. Specifically, for example, in the low-temperature refrigerator, the generator has the highest temperature and is susceptible to corrosion. In order to lower the temperature of this generator, it is only necessary to lower the condensation temperature of the condenser.However, conventionally, the condenser is cooled with cooling water, and it is not possible to use very low temperature water for this cooling water. Therefore, the condensation temperature cannot be lowered.

From the above, in the conventional binary refrigeration cycle, in both the high-temperature side refrigerator and the low-temperature side refrigerator, since the generator is at a high temperature, sulfuric acid is used as the absorption medium from the viewpoint of corrosion. However, if the absorber is air-cooled using an aqueous solution of lithium bromide, there is a problem that the entire apparatus becomes large.

[0010] The present invention has been made in view of such a point, and an object thereof is to provide a low-temperature refrigerator (10 L).
By setting the absorption medium temperature (T6) at the generator outlet to be low, an absorption refrigeration system using a substance having excellent characteristics as an absorption medium, such as sulfuric acid, as an absorption medium is realized. Accordingly, the size of the entire apparatus can be reduced.

[0011]

SUMMARY OF THE INVENTION The present invention relates to a high-temperature refrigerator.
The condenser (12L) of the low-temperature refrigerator (10L) is cooled by using the cold generated by the evaporator (13H) of (10H).

Specifically, the means adopted by the first aspect of the invention is a high-temperature refrigerator (1) constituted by an absorption refrigeration cycle.
0H) and a low-temperature refrigerator consisting of an absorption refrigeration cycle
(10L), and the generator (11
H), the low-temperature refrigerator (10
L), the absorption medium in the generator (11L) is heated to regenerate the absorption medium, and at the same time, the absorption refrigerating apparatus is provided with heating means (30) for condensing the refrigerant of the high-temperature side refrigerator (10H). It is assumed. The cold generated by the evaporation of the refrigerant in the high-temperature refrigerator (10H) is used to cool the low-temperature refrigerator.
Cooling means (40) for condensing (10L) refrigerant is provided.

According to the present invention, the high-temperature refrigerator (1
In the evaporator (13H) of (0H), cold heat is generated by evaporation of the refrigerant. The cooling means (40) uses this cold heat to cool the low-temperature side refrigerator (1
The refrigerant is condensed in the condenser (0L) (12L).

[0014] The measures taken by the invention of claim 2 are based on the absorption refrigeration apparatus of claim 1.
The cooling means (40) has a heat medium for heat transfer and is provided in the evaporator (13H) of the high-temperature refrigerator (10H).
(13H) Evaporation-side heat exchange section that exchanges heat between the refrigerant and the heat medium
(41), a condenser-side heat exchange section (42) provided in the condenser (12L) of the low-temperature refrigerator (10L) for exchanging heat between the refrigerant and the heat medium of the condenser (12L), and a pump ( 43) are connected by a pipe to form a closed circuit, and the heat medium circulates in the closed circuit to carry out heat transfer.

According to the present invention, the cooling means (4
0) The heat medium and the high-temperature refrigerator
The refrigerant in the evaporator (13H) in (10H) exchanges heat with the refrigerant in the evaporator (13H).
In H), the heat medium is cooled by the cold generated by the evaporation of the refrigerant. This heat medium conveys the cold heat by flowing through the pipes by the pump (43), and the heat medium is condensed side heat exchange section (4
2). In the condensing-side heat exchange section (42), the heat medium exchanges heat with the refrigerant in the condenser (12L) of the low-temperature refrigerator (10L), and the cold heat condenses the refrigerant in the low-temperature refrigerator (10L).

The measures taken by the third aspect of the present invention are the same as those of the first or second aspect, except that the low-temperature chiller is provided.
The absorption medium of (10L) is sulfuric acid, and the absorption medium of the high-temperature refrigerator (10H) is an aqueous solution containing lithium bromide as a main component.

According to the present invention, the low-temperature refrigerator (1)
0L), the absorption medium of the absorber (14L) can be set to a high temperature.

The measures taken by the invention described in claim 4 are the same as the invention described in any one of claims 1 to 4.
The absorber (14L) of the low-temperature refrigerator (10L) and the high-temperature refrigerator (10L)
The absorber (14H) of H) is configured to radiate the heat absorbed by the absorbing medium by heat exchange with air.

According to the present invention, in the absorbers (14L, 14H) on both the low-temperature side and the high-temperature side, the absorption medium is cooled by heat exchange with air and is kept at a constant temperature. A decrease in performance is prevented.

[0020]

As described above, according to the first aspect of the present invention, the low-temperature side refrigerator (10L) is cooled by utilizing the cold generated in the evaporator (13H) of the high-temperature side refrigerator (10H). The refrigerant is condensed in the condenser (12L). Therefore, the low-temperature refrigerator (1
0L) Refrigerant condensation temperature (T6) can be set low,
Since the absorption medium temperature (T4) at the (10 L) generator outlet can be set low, highly corrosive sulfuric acid or the like can be used as the absorption medium. Thereby, metal corrosion in the generator (11L) of the low-temperature refrigerator (10L) can be reduced.

Also, in the high-temperature side refrigerator (10H), since the refrigerant evaporation temperature (T5) can be set high, the absorption medium temperature (T2) at the outlet of the absorber can be set high. The temperature difference between the cooling medium for cooling the vessel (14H) and the absorbing medium can be made large. This allows the absorber
The heat transfer area of (14H) is reduced, and the absorber (14H) of the high-temperature refrigerator (10H) can be downsized.

According to the second aspect of the present invention, the same effect as the effect of the first aspect of the present invention can be obtained, and the heat medium is circulated by the pump (43), so that there is no restriction on the layout of the equipment.

According to the third aspect of the present invention, the same effect as that of the first or second aspect of the present invention is obtained, and sulfuric acid used as an absorption medium of the low-temperature refrigerator (10 L) is liquid at room temperature. Since it is a substance and does not precipitate crystals unlike the aqueous lithium bromide solution, the operating concentration of the absorbing medium can be set high. That is, in the During diagram of FIG. 5, the positions of the lines (a) and (b), which are lines with a constant concentration of the absorbing medium, can be shifted to the right.
The absorption medium temperature (T2) at the absorber outlet can be increased without changing the evaporation temperature (T5) of the refrigerant, and the temperature difference between the cooling medium that cools the absorber (14L) and the absorption medium must be large. Can be. As a result, the heat transfer area of the absorber (14L) is reduced, and the size of the absorber (14L) of the low-temperature refrigerator (10L) can be reduced.

Further, an aqueous solution containing lithium bromide as a main component is used as an absorption medium of the high-temperature refrigerator (10H).
Therefore, the existing technology can be used for the high-temperature side refrigerator (10H), and the reliability of the device is maintained.

According to the fourth aspect of the invention, the effects of the first to third aspects of the invention can be obtained, and at the same time, the low-temperature side and high-temperature side absorbers (14L, 14H) can be air-cooled. That is, in the conventional apparatus, when the absorber is air-cooled, it becomes large, and the installation area is increased as compared with the water-cooled type. Air cooling becomes possible.

[0026]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the absorption refrigeration system of the present embodiment comprises two absorption refrigeration cycles and a cooling circuit (40) which is a feature of the present invention. The side chiller (10H) and the other absorption refrigeration cycle are configured as a low temperature chiller (10L). The absorption refrigeration cycle as the high-temperature refrigerator (10H) uses an aqueous solution of lithium bromide as the absorption medium and water as the refrigerant, while the absorption refrigeration cycle as the low-temperature refrigerator (10L) uses sulfuric acid. Is used as an absorption medium and water is used as a refrigerant. However, sulfuric acid here does not mean a pure substance but a mixture of sulfuric acid and water.

The high-temperature refrigerator (10H) includes a generator (11H) for concentrating an aqueous solution of lithium bromide, a condenser (30) for condensing steam generated in the generator (11H), and a condenser (30). An evaporator (13H) in which water condensed in (30) evaporates, and an absorber (14H) in which aqueous lithium bromide absorbs water vapor generated in the evaporator (13H)
It is composed of

The generator (11H) is provided with a gas burner (not shown), and is configured to heat the aqueous solution of lithium bromide with the combustion gas. The generator (11H) and the absorber (14H) are connected by a solution pipe (20H) to form a closed circuit solution circuit (22H), and the solution pipe (20H) has a solution pump (15H). And an aqueous lithium bromide solution is circulated between the generator (11H) and the absorber (14H). On the other hand, the generator (11H) is provided with a separator (16H) for performing gas-liquid separation of the aqueous solution of lithium bromide and water vapor, and a heating line (24) is formed through the separator (16H). . The heating line (24) includes a generator (11H) and a condenser (3
0) and the evaporator (13H) are connected by a refrigerant pipe (21H). The condensing section (30) is provided inside the generator (11L) of the low-temperature refrigerator (10L) and provided with a heating means.
(30), and the heating line (24) is connected to the high-temperature refrigerator (1).
0H) generated by the generator (11H) is transported to the generator (11L) of the low-temperature refrigerator (10L) and
L) is configured to heat the absorbing medium.

The evaporator (13H) and the absorber (14H)
Eliminator (17H) that separates water and water vapor as refrigerant
, So that the steam generated in the evaporator (13H) moves to the absorber (14H). The absorber (14H) is composed of a cross-fin type heat exchanger, is configured to cool the lithium bromide aqueous solution by heat exchange with air, and includes a fan (18) and a fan motor (not shown). ing.

On the other hand, the low-temperature refrigerator (10L) includes a generator (11L) for concentrating sulfuric acid, a condenser (12L) for condensing steam generated in the generator (11L), and a condenser (12L). Evaporator (13L) for evaporating the water condensed in (1) and an absorber (14L) for absorbing the water vapor generated in the evaporator (13L) with sulfuric acid.

The generator (11L) is provided with a condensing section (30) of a heating line (24), and is configured to heat sulfuric acid by heat of condensation generated when steam in the high-temperature refrigerator (10H) condenses. Have been. The generator (11L) and absorber (14L) are connected to the solution piping (2
0L) to form a closed circuit circuit (22L), the solution pipe (20L) is provided with a solution pump (15L), and sulfuric acid circulates through the solution pipe (20L). ing. On the other hand, the generator (11L) is connected to a condenser (12L) via a separator (16L) that performs gas-liquid separation of sulfuric acid and steam, and steam is transferred from the generator (11L) to the condenser (12L). Moving. The condenser (12L) and the evaporator (13L) are connected to a refrigerant pipe (21
L).

Further, the evaporator (13L) and the absorber (14L)
Eliminator (17L) that separates water and water vapor as refrigerant
The steam generated in the evaporator (13L) moves to the absorber (14L). The absorber (14L) is composed of a cross-fin type heat exchanger, is configured to cool sulfuric acid by heat exchange with air, and includes a fan (18) and a fan motor (not shown). Also evaporator
(13L) is provided with a cold heat exchanger of the use side circuit (50), and the evaporating refrigerant and the brine circulating in the use side circuit (50) exchange heat, and the cold heat generated in the evaporator (13L) is provided. Is used in the use side circuit (50).

The cooling circuit (40), which is a feature of the present invention, comprises an evaporation-side heat exchange section (41), a condensation-side heat exchange section (42), and a pump (43). Make up the circuit. The closed circuit is filled with a heat medium such as water, and the heat medium circulates through the closed circuit to carry out heat transfer.

The evaporating side heat exchange section (41) is connected to the high temperature side refrigerator (1).
0H) is provided inside the evaporator (13H), and the evaporating refrigerant and the heat medium exchange heat, while the condensing-side heat exchange part (42) is a condenser (12L) of the low-temperature refrigerator (10L). The refrigerant and the heat medium, which are provided inside and exchange heat, perform heat exchange.

-Operating operation- Next, the operating operation of the absorption refrigeration system of the present embodiment will be described with reference to FIGS.

First, the high-temperature refrigerator (10H) will be described. In the generator (11H), the aqueous solution of lithium bromide is heated from the generator inlet temperature (T3H) to the generator outlet temperature (T4H) by a gas burner. Along with the generation of high-temperature steam, the aqueous lithium bromide solution is concentrated (see FIG. 3A). The high-temperature steam generated by the generator (11H)
In (H), the droplets of the aqueous solution of lithium bromide contained in the water vapor are removed, and only the water vapor flows through the heating line (24) to reach the condensing section (30), which is an absorption medium for the low-temperature side refrigerator (10L). It exchanges heat with sulfuric acid and condenses at the condensation temperature (T6H) (see FIG. 3B). The condensed water flows through the refrigerant pipe (21H), reaches the evaporator (13H), and exchanges heat with the heat medium of the cooling circuit (40) in the evaporating-side heat exchange section (41) at the evaporation temperature (T5H). After evaporation (see FIG. 3C), water drops and steam are separated by an eliminator (17H), and only the steam reaches the absorber (14H) (see FIG. 3D).

On the other hand, the aqueous solution of lithium bromide concentrated in the generator (11H) flows through the solution pipe (20H) and reaches the absorber (14H) (see FIG. 3D). (13
H) absorbs the water vapor flowing in from it and exchanges heat with the air to change the absorber inlet temperature (T1H) to the absorber outlet temperature (T2H).
Cooled down. Then, the aqueous solution of lithium bromide diluted by absorbing water vapor in the absorber (14H) flows through the solution pipe (20H) by the solution pump (15H) to generate the generator (11H).
To be concentrated again and repeat this circulation.

Next, the low-temperature refrigerator (10L) will be described. In the generator (11L), sulfuric acid is added to the high-temperature refrigerator (10L).
H) condensing section (30), the condensation heat generated when the refrigerant in the high-temperature refrigerator (10H) condenses
L) to the generator outlet temperature (T4L), high-temperature steam is generated, and sulfuric acid is concentrated (E in FIG. 3).
reference). This high-temperature steam is condensed by removing the sulfuric acid droplets contained in the steam in the separator (16 L), leaving only the steam to reach the condenser (12 L) and exchanging heat with the heat medium in the cooling circuit (40). It condenses at the temperature (T6L) (see FIG. 3F). This condensed water flows through the refrigerant pipe (21L) and reaches the evaporator (13L).
The use side circuit (5) is connected to the heat exchange section (51) of the use side circuit (50).
The water exchanges with the brine of (0) and evaporates at the evaporation temperature (T5L) (see FIG. 3G). After that, water drops and steam are separated by the eliminator (17L), and only the steam reaches the absorber (14L).
(See FIG. 3, H).

On the other hand, the sulfuric acid concentrated in the generator (11 L) flows through the solution pipe (20 L) and reaches the absorber (14 L) (see FIG. 3H), and the sulfuric acid flows in from the evaporator (13 L). While absorbing water vapor, it exchanges heat with air to be cooled from the absorber inlet temperature (T1L) to the absorber outlet temperature (T2L). Then, the sulfuric acid diluted by absorbing water vapor in the absorber (14 L)
It flows through the solution pipe (20L) by the solution pump (15L), is sent to the generator (11L), is concentrated again, and repeats this circulation.

In the cooling circuit (40), which is a feature of the present invention, the evaporating refrigerant and the heat medium are evaporated in the evaporation-side heat exchange section (41) provided in the evaporator (13H) of the high-temperature refrigerator (10H). Perform heat exchange, and the heat medium is cooled. The cooled heat medium flows through the piping by the action of the pump (43), reaches the condensation-side heat exchange section (42) provided in the condenser (12L) of the low-temperature refrigerator (10L), and condenses the refrigerant. And the heat medium exchange heat, and the heat medium is heated. Then, the heated heat medium flows through the pipe, reaches the evaporation-side heat exchange section (41) again, and repeats this circulation.

According to the present embodiment, the cooling circuit (40) is provided between the high-temperature refrigerator (10H) and the low-temperature refrigerator (10L). The refrigerant condensation temperature (T6L) of the chiller (10L) can be set lower than before, and
The absorption medium temperature (T4L) at the outlet of the generator (11L) of L) can be set lower than before. As a result, the generator (11L) can be operated at a temperature lower than the temperature at which metal corrosion by sulfuric acid becomes a problem, and sulfuric acid can be used as an absorbing medium.

In the conventional absorption refrigerator using an aqueous solution of lithium bromide as an absorption medium, the operating concentration of the aqueous solution of lithium bromide cannot be increased due to the presence of crystallization lines (X). In this embodiment, the low-temperature refrigerator (10 L)
Since the absorption medium is sulfuric acid, the operating concentration is not restricted by the crystallization line (X). As a result, (1L), (2L), (3
As shown in (L) and (4L), the absorption cycle of the low-temperature refrigerator (10L) can be raised to a high temperature by using an aqueous solution of lithium bromide. As a result, the absorber (14L) can be air-cooled, the size of the entire device can be reduced, and the power for driving the fan (18) provided in the absorber (14L) can be obtained. Can be reduced.

Further, the refrigerant evaporation temperature (T5H) in the high-temperature refrigerator (10H) is determined by the refrigerant condensation temperature of the low-temperature refrigerator (10L).
(T6L), the refrigerant evaporation temperature (T5H) of the high-temperature refrigerator (10H) is lower than the refrigerant evaporation temperature of the conventional absorption refrigerator using an aqueous lithium bromide solution. Higher temperatures can be set.

Thus, while satisfying the condition that the refrigerant evaporation temperature (T5H) in the high-temperature side refrigerator (10H) is set lower than the refrigerant condensation temperature (T6L) in the low-temperature side refrigerator (10L), In the chiller (10H) and the low-temperature refrigerator (10L), the absorber outlet temperature (T2L, T2H) of the absorption medium can be set to a higher temperature than before. As a result, the absorber (1
4H) It is possible to achieve air cooling and downsizing, and at the same time, it is possible to reduce the power for driving the fan (18) provided in the absorber (14H).

The generator (11L) of the low-temperature refrigerator (10L)
In the above, the absorption medium is heated by the condensation heat generated when the refrigerant in the high-temperature refrigerator (10H) condenses. Therefore,
As when heating the absorption medium with a gas burner,
Only a part of the generator (11L) is not locally heated, and as a result, metal corrosion in the generator (11L) can be reduced, and high metal corrosivity such as sulfuric acid can be obtained. Even when a substance is used as an absorption medium,
The reliability of the device can be improved.

In particular, in this embodiment, the absorber outlet temperatures (T2L, T2H) of the absorbing medium can be set to be equal. Specifically, a low-temperature refrigerator (10 L) and a high-temperature refrigerator
At (10H), the absorber outlet temperature (T2L, T2H)
An absorption refrigeration cycle set at 60 ° C can be realized.

Therefore, the effect of setting the absorber outlet temperature (T2L, T2H) of the absorbing medium to 60 ° C. as described above will be described. The absorption refrigeration cycle shown by the points (1), (2), (3) and (4) in FIG. 4 is a conventional one using an aqueous solution of lithium bromide as an absorption medium. The absorber outlet temperature (T2) of the aqueous solution is about 35 to 40 ° C.
Then, the operating concentration of the aqueous solution of lithium bromide in the above-mentioned conventional absorption refrigeration cycle was shifted to a higher concentration side, and the absorber exit temperature (T2 ') of the aqueous solution of lithium bromide was set at 60 ° C. (1 '), (2'), (3 '), and (4'). As can be seen from FIG. 4, this absorption-type refrigeration cycle uses an aqueous solution of lithium bromide. Intersects with the crystallization line (X). This means that the aqueous lithium bromide solution crystallizes during circulation, and in fact, (1 '), (2'),
The absorption refrigeration cycle indicated by the points (3 ') and (4') is not feasible.

On the other hand, in this embodiment, the absorber outlet temperature of the absorbing medium can be set to a high temperature of 60 ° C. without causing the above-described problem of crystallization of the absorbing medium. For this reason, the temperature difference between the absorbing medium and the cooling air in the absorber (14L, 14H) can be increased by 20 to 25 ° C. as compared with the related art, and as a result, as described above, the absorber
(14L, 14H) heat transfer area can be greatly reduced. Therefore, the absorber (14L, 14H) can be downsized,
Air cooling of absorption refrigerators is possible.

-Other Embodiments of the Invention- In this embodiment, the absorption medium of the high-temperature refrigerator (10H) is an aqueous solution of lithium bromide. However, the present invention is not limited to the case where lithium bromide is the main solute. In addition, a substance for improving the solubility other than lithium bromide, an anticorrosive for preventing corrosion of elemental devices, and the like may be dissolved.

The generator (11H) of the high-temperature refrigerator (10H)
In the above, the lithium bromide aqueous solution is heated by the gas burner, but may be heated by burning kerosene or the like, or may be heated by high-temperature steam.

[Brief description of the drawings]

FIG. 1 is a piping diagram of an absorption refrigeration apparatus according to an embodiment of the present invention.

FIG. 2 is a During diagram showing a cycle of the absorption refrigeration apparatus according to the embodiment of the present invention.

FIG. 3 is an explanatory diagram showing temperatures of an absorption medium and a refrigerant in each device of the absorption refrigeration apparatus according to the embodiment of the present invention.

FIG. 4 is a During diagram showing a cycle of an absorption refrigeration apparatus according to the related art.

FIG. 5 is a During diagram showing a cycle of an absorption refrigeration apparatus according to the related art.

[Explanation of symbols]

 (10L) Low temperature refrigerator (10H) High temperature refrigerator (11L), (11H) Generator (12L) Condenser (13H) Evaporator (14L), (14H) Absorber (30) Condenser (Heating means (40) Cooling circuit (cooling means) (41) Evaporation side heat exchange section (42) Condensation side heat exchange section (43) Pump

Claims (4)

[Claims] 1. A high-temperature refrigerator (10H) constituted by an absorption refrigeration cycle, and a low-temperature refrigerator (10L) constituted by an absorption refrigeration cycle. The high-temperature refrigerant generated by the generator (11H) causes the generator (11L) of the low-temperature refrigerator (10L)
In the absorption refrigeration apparatus provided with a heating means (30) for heating the absorption medium at the same time to regenerate the absorption medium and condensing the refrigerant of the high-temperature refrigerator (10H), the high-temperature refrigerator (10H A) a cooling means (40) for condensing the refrigerant of the low-temperature refrigerator (10L) by the cold generated by the evaporation of the refrigerant in the above (2). 2. The absorption refrigeration apparatus according to claim 1, wherein the cooling means (40) has a heat medium for transferring heat and is provided in the evaporator (13H) of the high-temperature side refrigerator (10H). Evaporator
(13H) Evaporation-side heat exchange section that exchanges heat between the refrigerant and the heat medium
(41), a condenser-side heat exchange section (42) provided in the condenser (12L) of the low-temperature refrigerator (10L) for exchanging heat between the refrigerant and the heat medium of the condenser (12L), and a pump ( 43) are connected by a pipe to form a closed circuit, and the heat medium circulates through the closed circuit to carry out heat transfer. 3. The absorption refrigeration apparatus according to claim 1, wherein the absorption medium of the low-temperature refrigerator (10L) is sulfuric acid, and the absorption medium of the high-temperature refrigerator (10H) is lithium bromide. An absorption refrigeration apparatus characterized by being an aqueous solution containing a main component. 4. The absorption refrigeration apparatus according to claim 1, wherein the absorber (14L) of the low-temperature refrigerator (10L) and the high-temperature refrigerator (10L).
H) The absorber (14H) is configured to radiate the heat absorbed by the absorbing medium by heat exchange with air.