KR20140098540A - Absorption type air conditioning system for automotive vehicles - Google Patents

Abstract

The present invention relates to an absorption-type air conditioning apparatus for a vehicle, wherein the absorption-type air conditioning apparatus is advantageous for securing the installation space of a radiator, and is capable of improving the cooling performance of an evaporator by raising a refrigerant evaporation rate in the evaporator. According to the present invention for the above effects, an absorption-type air conditioning apparatus for a vehicle comprises: an evaporator with an inner flow path storing a first refrigerant therein and having a second refrigerant circulated therein; a first and a second absorber alternately absorbing the first refrigerant in the evaporator so that the first refrigerant can be evaporated to cool the second refrigerant in the inner flow path; a condenser returning the first refrigerant to the evaporator after condensing the first refrigerant separated from one of the first and the second absorber; an indoor heat exchanger receiving the second refrigerant cooled by the evaporator, and performs heat exchange between the cooled second refrigerant and air blown into the interior of the vehicle; and an absorption and separation control device controlling the first and the second absorber to perform absorption and separation alternately by alternately and mutually supplying a cold fluid and a hot fluid to the first and the second absorber, wherein the absorption and separation control device has a valve unit controlled in a first and a second mode. In the first mode, the valve unit allows the second refrigerant as the cold fluid discharged from the indoor heat exchanger to flow into the inner flow path of the evaporator after circulating the second refrigerant in the first absorber. In the second mode, the valve unit allows the second refrigerant discharged from the indoor heat exchanger to flow into the inner flow path of the evaporator after circulating the second refrigerant in the second absorber.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an adsorption type air-

The present invention relates to an air conditioner for a suction type vehicle, and more particularly, to an air conditioner for a suction type vehicle which is very advantageous in securing a space for installing a radiator and can improve a refrigerating performance of an evaporator by increasing a refrigerant vaporization rate in the evaporator .

In recent years, there have been various developments of eco-friendly vehicle air conditioners that can increase the fuel efficiency of the vehicle, generate no pollutants, and have little noise and vibration. As one example thereof, there is a suction type air conditioner.

As shown in FIG. 1, the adsorption-type air conditioning apparatus includes an evaporator 1, first and second adsorbers 3 and 5, and a second adsorber 5 as shown in FIG. 1 for cooling the interior of the vehicle using the heat of vaporization generated in the process of adsorbing refrigerant. , A condenser (7), and an indoor heat exchanger (9).

The evaporator (1) has an internal flow passage (1a) in which the first refrigerant is stored and the second refrigerant can be introduced and flowed.

The first and second adsorbers 3, 5 contain a solid adsorbent such as silica gel, zeolite or the like and adsorb the first refrigerant alternately stored in the evaporator 1. Accordingly, the first refrigerant of the evaporator 1 is vaporized and the heat of the second refrigerant flowing along the internal flow path 1a is taken away. As a result, the second refrigerant in the inner flow path 1a is cooled.

Here, when one of the first and second adsorbers 3 and 5 adsorbs the first refrigerant of the evaporator 1, the other one desorbs the first refrigerant adsorbed. This is because, immediately after one adsorption action is completed, the other adsorption action can be continuously performed. Thereby, the cooling action of the evaporator 1 can be continued without interruption.

The condenser 7 introduces the first refrigerant desorbed from any one of the first and second adsorbers 3 and 5, condenses it, and liquefies it. Then, the liquefied first refrigerant is returned to the evaporator (1).

Here, the cold fluid cooled by the radiator 10 is introduced into the condenser 7 and circulated. The first coolant of the condenser 7 is condensed by the cold air of the circulating cold fluid.

The indoor heat exchanger (9) introduces the second refrigerant cooled by the evaporator (1), and then exchanges heat between the introduced second refrigerant and the air blown into the passenger compartment. Thus, the air blown into the passenger compartment is cooled. Thus, the interior of the vehicle is cooled.

The adsorption-type air conditioning apparatus is provided with an adsorption-desorption control apparatus (20) for controlling adsorption and desorption operations of the first and second adsorbers (3, 5).

The suction and desorption control apparatus 20 includes a radiator 10 for providing a cold fluid as a refrigerant adsorption inducing material and an engine 22 for providing a hot fluid as a refrigerant desorption inducing material And a plurality of directional control valves (not shown) for controlling the flow direction of the cold fluid of the radiator 10 and the on fluid of the engine 22, that is, the engine coolant water to supply the coolant to the first and second adsorbers 3, 24).

Particularly, the directional control valves 24 are controlled in the "first mode" and the "second mode". At this time, in the "first mode", the coolant of the radiator 10, which is discharged from the condenser 7, 1 adsorber 3, and the on-fluid supplied from the engine 22 is introduced into the second adsorber 5. [ Therefore, the adsorption action can be performed in the first adsorber 3 and the desorption action can be performed in the second adsorber 5.

Conversely, in the "second mode ", the cool fluid of the radiator 10 discharged from the condenser 7 is introduced into the second adsorber 5. The on fluid supplied from the engine 22 is introduced into the first adsorber 3, . Therefore, desorption action can be performed in the first adsorber 3, and adsorption action can be performed in the second adsorber 5.

According to the adsorption type air conditioner having such a constitution, since the interior of the vehicle is cooled by using the environmentally friendly adsorbent, there is no generation of contaminants. Therefore, it reduces pollution of the environment.

In addition, since no compressor is used, noise, vibration, and energy consumption are very small. Therefore, it is possible to improve the riding comfort of the passenger compartment and to reduce the fuel consumption.

However, in the conventional adsorption type air conditioning system, since the cooling fluid of the radiator 10 is cooled and then introduced into the first and second adsorbers 3 and 5 after cooling the condenser 7, There is a disadvantage in that the load of the radiator 10 must be increased, and the size of the radiator 10 must be increased accordingly.

In addition, there is a drawback that a large space for installing the radiator 10 must be secured due to such a problem. Particularly, there is a problem that the size of the engine room can not be made large in order to secure the installation space of the radiator 10.

In addition, conventionally, since the cooling fluid of the radiator 10 has a structure in which the first and second adsorbers 3 and 5 are cooled after the condenser 7 is cooled, the first and second adsorbers 3 , 5) is lowered. In view of this disadvantage, there is a problem that the first refrigerant adsorption efficiency in the first and second adsorbers (3, 5) is lowered.

In addition, because of such a problem, there is a drawback that the evaporation rate of the refrigerant in the evaporator 1 is significantly lowered, and the cooling performance of the evaporator 1 is remarkably deteriorated due to such drawbacks, Has been pointed out.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a suction type air conditioner for reducing a size of a radiator in accordance with a reduced load by reducing a load of a radiator, .

Another object of the present invention is to provide an air conditioner for a suction type vehicle, which is configured to reduce the size of the radiator, thereby securing an installation space for the radiator.

It is still another object of the present invention to provide a suction type air conditioner for a vehicle that can secure a space for installing a radiator so that the radiator can be easily installed without forming a large engine room.

It is still another object of the present invention to provide an adsorption-type air conditioning apparatus capable of improving refrigerant adsorption efficiency in the first and second adsorbers by improving the cooling efficiency of the first and second adsorbers.

It is still another object of the present invention to provide an adsorption-type air conditioning apparatus capable of improving the refrigerant adsorption efficiency in the first and second adsorbers, thereby improving the evaporation rate of the refrigerant in the evaporator.

It is still another object of the present invention to provide an adsorption-type vehicle air-conditioning system capable of improving the cooling performance of the evaporator by improving the evaporation rate of the refrigerant in the evaporator, Device.

In order to achieve the above object, the adsorption type vehicle air conditioning system of the present invention comprises: an evaporator having an internal flow path for storing a first refrigerant and circulating a second refrigerant; and an evaporator for evaporating the second refrigerant of the internal flow path, A condenser for condensing the first refrigerant desorbed from any one of the first and second adsorbers and returning the first refrigerant to the evaporator; An indoor heat exchanger for introducing a second refrigerant cooled in the evaporator to heat the refrigerant by exchanging heat with air blown into a passenger compartment, and a second heat exchanger for alternately supplying the cold fluid and the warm fluid to the first and second adsorbers, And a suction and desorption control device for controlling the first and second adsorbers so that they can perform adsorption and desorption operations alternately, characterized in that said adsorption and desorption agent The apparatus includes valve means controlled in a first mode and a second mode, wherein the valve means controls the second refrigerant, which is a cold fluid discharged from the indoor heat exchanger, to the first adsorber The second refrigerant discharged from the indoor heat exchanger is introduced into the inner flow path of the evaporator after circulating the second refrigerant discharged from the indoor heat exchanger to the second adsorber in the second mode .

Preferably, in the first mode, the valve means introduces the engine cooling water, which is the gaseous fuel discharged from the engine, into the second adsorber, and then returns the engine cooling water to the engine. In the second mode, And returning the discharged engine cooling water to the engine after circulating the engine cooling water to the first adsorber.

According to the air conditioner for a suction type vehicle according to the present invention, since the first and second adsorbers are cooled using the refrigerant of the indoor heat exchanger, the conventional technology for cooling the first and second adsorbers using the refrigerant of the radiator Otherwise, the refrigerant of the radiator is not used at all. Therefore, there is an effect that the load of the radiator can be reduced.

In addition, since the load of the radiator can be reduced, the size of the radiator can be reduced according to the reduced load.

Further, since the size of the radiator can be reduced, it is very advantageous to secure a space for installation of the radiator. Therefore, there is an effect that the radiator can be easily installed without forming a large engine room.

In addition, since the first and second adsorbers are cooled using the refrigerant of the indoor heat exchanger having a low temperature, the cooling efficiency of the first and second adsorbers can be improved, The refrigerant adsorption efficiency can be improved.

Further, since the adsorption efficiency of the refrigerant in the first and second adsorbers can be improved, the evaporation rate of the refrigerant in the evaporator can be improved, and thus the cooling performance of the evaporator can be improved. As a result, The efficiency can be remarkably improved.

1 is a view showing a configuration of a conventional air conditioner for a suction type vehicle,
2 is a view showing a configuration of an air conditioner for a suction type vehicle according to the present invention,
FIG. 3 is an operational view showing an operation example of the present invention, in which the adsorption type air conditioning apparatus enters the first mode, adsorption action occurs in the first adsorption device, and desorption action occurs in the second adsorption device,
FIG. 4 is an operation diagram showing an operation example of the present invention, in which the adsorption type air conditioning apparatus enters the second mode to perform a desorption action in the first adsorption unit and an adsorption action in the second adsorption unit.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of an air conditioner for a suction type vehicle according to the present invention will be described in detail with reference to the accompanying drawings (the same components as those in the prior art are denoted by the same reference numerals).

First, a description will be given of an air conditioner for a suction type vehicle with reference to FIG. 2 before a characteristic portion of a suction type air conditioner for a vehicle according to the present invention is examined.

The adsorption type air conditioner for an adsorption type vehicle comprises an evaporator 1, first and second adsorbers 3 and 5, a condenser 7 and an indoor heat exchanger 9.

The evaporator (1) has an internal flow passage (1a) in which the first refrigerant is stored and the second refrigerant can be introduced and flowed.

The first and second adsorbers (3, 5) contain a solid adsorbent and alternately adsorb the first refrigerant stored in the evaporator (1). Accordingly, the first refrigerant in the evaporator 1 is vaporized and the second refrigerant in the internal flow path 1a can be cooled. Here, when one of the first and second adsorbers 3 and 5 adsorbs the first refrigerant of the evaporator 1, the other one desorbs the first refrigerant adsorbed.

The condenser 7 introduces the first refrigerant desorbed from any one of the first and second adsorbers 3 and 5, condenses it, and liquefies it. Then, the liquefied first refrigerant is returned to the evaporator (1). Thus, the first refrigerant is circulated.

Here, the cold fluid cooled in the radiator 10 is introduced into the condenser 7 and circulated. The first refrigerant in the condenser 7 is condensed because of the circulating cold fluid.

The indoor heat exchanger (9) introduces the second refrigerant cooled by the evaporator (1), and then exchanges heat between the introduced second refrigerant and the air blown into the passenger compartment. Thus, the air blown into the passenger compartment is cooled. Thus, the interior of the vehicle is cooled.

Next, the feature of the air conditioner for a car according to the present invention will be described in detail with reference to Fig.

First, the air conditioning system of the present invention has a structure in which the cold fluid circulated through the condenser 7 is immediately returned to the radiator 10.

Therefore, the cold fluid, in which the first refrigerant is circulated while circulating through the condenser 7, is directly returned to the radiator 10 without doing any other work. As a result, the load of the radiator 10 is remarkably reduced, unlike the conventional case where the cold fluid that has cooled the condenser 7 cools the first and second adsorbers 3 and 5 again.

As a result, the size of the radiator 10 can be reduced according to the reduced load. Accordingly, securing a space for installing the radiator 10 is very advantageous. Thereby, the radiator 10 can be easily installed without forming a large engine room.

2, the air conditioner of the present invention is provided with a suction / desorption control device 20 for controlling the adsorption and desorption operations of the first and second adsorbers 3, 5.

The intake and exhaust control apparatus 20 includes an indoor heat exchanger 9 for providing a cool fluid, an engine 22 for providing an on-fluid, And valve means (30) for controlling the flow direction of the on-fluid, that is, the engine coolant.

The valve means 30 includes first to sixth directional control valves 32, 34, 35, 37, 38, 39.

The first directional control valve 32 is a three-way valve provided at the outlet side of the engine 22 and is controlled in the "first mode" and the "second mode". At this time, in the " first mode ", the on fluid supplied from the engine 22 is controlled to the side of the second adsorber 5, and in the " (3).

The second directional control valve 34 is a three-way valve installed at the outlet side of the indoor heat exchanger 9 and is controlled in the "first mode" and the "second mode". At this time, in the " first mode ", the cold fluid provided by the indoor heat exchanger 9, that is, the second refrigerant is controlled in the direction toward the first adsorber 3, ) In the direction toward the second adsorber (5).

The third and fourth directional control valves 35 and 37 are three-way valves respectively provided at the inlet sides of the first adsorber 3 and the second adsorber 5, and the "first mode & "

At this time, in the "first mode ", the cold fluid of the indoor heat exchanger 9 fed through the second directional control valve 34 is introduced into the first adsorber 3, and the first directional control valve 32 And introduces the on fluid of the engine 22, which has been transferred through the second adsorber 5, to the second adsorber 5. Therefore, the adsorption action can be performed in the first adsorber 3 and the desorption action can be performed in the second adsorber 5.

Conversely, in the "second mode ", the cold fluid of the indoor heat exchanger 9, which is conveyed through the second directional control valve 34, is introduced into the second adsorber 5 and the first directional control valve 32 And introduces the on fluid of the engine 22 conveyed through the first adsorber 3 to the first adsorber 3. Therefore, desorption action can be performed in the first adsorber 3, and adsorption action can be performed in the second adsorber 5.

The first to fourth directional control valves 32, 34, 35 and 37 supply the cold fluid of the indoor heat exchanger 9 to the first adsorber 3 or the second adsorber 5 in accordance with the mode state , The adsorption efficiency of the first refrigerant is remarkably enhanced in the first and second adsorbers (3, 5).

This is because the temperature of the second refrigerant passed through the indoor heat exchanger 9 is very low. Particularly, since the cooling fluid of the radiator 10 for cooling the condenser 7 has a much lower temperature than the cooling fluid of the radiator 10 for cooling the condenser 7, The refrigerant adsorption efficiency of the first and second adsorbers 3 and 5 is remarkably improved.

Therefore, the evaporation rate of the refrigerant in the evaporator 1 can be improved. Thereby, the cooling performance of the evaporator 1 can be improved, and as a result, the cooling efficiency of the passenger compartment can be remarkably improved.

The fifth and sixth directional control valves 38 and 39 are three-way valves respectively installed at the outlet sides of the first adsorber 3 and the second adsorber 5, and the "first mode & "

At this time, in the "first mode", the cold fluid discharged from the first adsorber 3 is introduced into the evaporator 1, and the hot fluid discharged from the second adsorber 5 is returned to the engine 22.

Therefore, the coolant having the increased adsorption efficiency of the refrigerant in the first adsorber 3 is introduced into the evaporator 1 and cooled again. Then, the second adsorbent (5) is heated again while introducing the on fluid into the engine (22) which increases the desorption efficiency of the refrigerant.

Conversely, in the "second mode ", the cold fluid discharged from the second adsorber 5 is introduced into the evaporator 1, and the hot fluid discharged from the first adsorber 3 is returned to the engine 22.

Accordingly, the cold air having the increased adsorption efficiency of the refrigerant in the second adsorber 5 is introduced into the evaporator 1 and cooled again. In addition, the first adsorbent (3) is heated again while introducing into the engine (22) the on fluid having increased the desorption efficiency of the refrigerant.

Next, an operation example of the present invention having such a configuration will be described with reference to Figs. 3 and 4. Fig.

First, a case where the air conditioning apparatus enters the "first mode" will be described with reference to FIG.

The first to sixth directional control valves 32, 34, 35, 37, 38, 39 also enter the "first mode" when the air conditioning apparatus enters the "first mode".

The first to fourth directional control valves 32, 34, 35 and 37 which enter the first mode introduce the on fluid discharged from the engine 22 into the second adsorber 5, The cold fluid discharged from the unit (9) is introduced into the first adsorber (3).

Therefore, the adsorption action can be performed in the first adsorber 3 and the desorption action can be performed in the second adsorber 5.

On the other hand, the fifth directional control valve 38 which has entered the "first mode" introduces the cold fluid discharged from the first adsorber 3 to the evaporator 1. Then, the cold fluid introduced into the evaporator 1 is cooled again and introduced into the indoor heat exchanger 9. The cold fluid introduced into the indoor heat exchanger 9 cools the air to be blown into the passenger compartment while cooling the passenger compartment And the cold fluid having cooled in the inside of the car is recirculated back to the first adsorber 3, thereby assisting the adsorption of the refrigerant in the first adsorber 3.

The sixth directional control valve 39, which has entered the "first mode", introduces the on-fluid discharged from the second adsorber 5 into the engine 22. Then, the warm fluid introduced into the engine 22 is heated again, and the heated warm fluid is circulated back to the second adsorber 5, thereby assisting in the desorption of the refrigerant in the second adsorber 5.

Next, a case in which the air conditioner enters the "second mode" will be described with reference to FIG.

When the air conditioner enters the "second mode ", the first to sixth directional control valves 32, 34, 35, 37, 38 and 39 also enter the" second mode ".

The first to fourth directional control valves 32, 34, 35 and 37 which enter the "second mode " cause the on-fluid discharged from the engine 22 to be introduced into the first adsorber 3, The cold fluid discharged from the unit 9 is introduced into the second adsorber 5.

Thus, the adsorption action in the second adsorber 5 and the desorption action in the first adsorber 3 can take place.

On the other hand, the fifth directional control valve 38 that has entered the "second mode " returns the on-fluid discharged from the first adsorber 3 to the engine 22. Then, the warm fluid introduced into the engine 22 is heated again, and the heated warm fluid is circulated back to the first adsorber 3 to assist in the desorption of the refrigerant in the first adsorber 3.

The sixth directional control valve 39, which has entered the "second mode", introduces the cold fluid discharged from the second adsorber 5 to the evaporator 1. Then, the cold fluid introduced into the evaporator 1 is cooled again and introduced into the indoor heat exchanger 9. The cold fluid introduced into the indoor heat exchanger 9 cools the air to be blown into the passenger compartment while cooling the passenger compartment And the cold fluid having been cooled in the inside of the car is recirculated back to the second adsorber 5 to assist in adsorption of the refrigerant in the second adsorber 5.

According to the air conditioner of the present invention having such a configuration, since the first and second adsorbers 3 and 5 are cooled using the refrigerant of the indoor heat exchanger 9, the refrigerant of the radiator 10 is used Unlike the prior art in which the first and second adsorbers 3, 5 are cooled, no refrigerant of the radiator 10 is used at all. Therefore, the load of the radiator 10 can be reduced.

Further, since the load of the radiator 10 can be reduced, the size of the radiator 10 can be reduced according to the reduced load.

Further, since the size of the radiator 10 can be reduced, it is very advantageous to secure a space for installing the radiator 10. Therefore, the radiator 10 can be easily installed without greatly forming the engine room.

Further, since the first and second adsorbers 3 and 5 are cooled using the refrigerant of the indoor heat exchanger 9 having a low temperature, the cooling efficiency of the first and second adsorbers 3 and 5 can be improved Therefore, the refrigerant adsorption efficiency in the first and second adsorbers 3 and 5 can be improved.

In addition, since the adsorption efficiency of the refrigerant in the first and second adsorbers 3 and 5 can be improved, the refrigerant vaporization rate in the evaporator 1 can be improved, and thus the cooling performance of the evaporator 1 can be improved As a result, the cooling efficiency of the interior of the vehicle can be remarkably improved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

1: Evaporator 1a: Internal flow path
3: first adsorber 5: second adsorber
7: condenser 9: indoor heat exchanger
10: Radiator 20: Suction / Desorption control device
22: Engine 30: Valve means
32: first direction control valve 34: second direction control valve
35: third direction control valve 37: fourth direction control valve
38: fifth direction control valve 39: sixth direction control valve

Claims (4)

An evaporator 1 for storing a first refrigerant and having an internal flow passage 1a through which a second refrigerant is circulated; a second evaporator 1 for cooling the second refrigerant in the internal flow passage 1a while the first refrigerant is vaporized 1 and the first refrigerant of the first and second adsorbers 3 and 5 and the first refrigerant of the first and second adsorbers 3 and 5 is condensed by the first and second adsorbers 34 and 36, An indoor heat exchanger 9 for introducing the second refrigerant cooled by the evaporator 1 to heat the refrigerant by exchanging heat with the air blown into the passenger compartment 1, A suction and desorption control unit for controlling the first and second adsorbers (3, 5) to perform adsorption and desorption operations by alternately feeding the fluids to the first and second adsorbers (3, 5) In the air conditioner for a suction type vehicle including the apparatus (20)
The intake and exhaust control device (20) includes a valve means (30) controlled in a first mode and a second mode, and the valve means (30)
In the first mode, the second refrigerant, which is a cold fluid discharged from the indoor heat exchanger (9), is introduced into the internal flow passage (1a) of the evaporator (1) after circulating to the first adsorber (3)
And the second refrigerant discharged from the indoor heat exchanger (9) is introduced into the internal flow passage (1a) of the evaporator (1) after circulating the second refrigerant to the second adsorber (5) Air-conditioning system for absorption vehicles. The method according to claim 1,
The valve means (30)
In the first mode, engine cooling water, which is the warmed oil discharged from the engine 22, is introduced into the second adsorber 5, circulated, and returned to the engine 22,
Wherein the engine cooling water circulated to the first adsorber (3) is returned to the engine (22) during the second mode. 3. The method of claim 2,
The valve means (30)
Wherein the controller controls the engine cooling water discharged from the engine in the direction of the second adsorber in the first mode and the engine cooling water discharged from the engine in the second mode, A first directional control valve 32 for controlling the direction of the adsorbent 3;
The first mode is a mode in which the second refrigerant discharged from the indoor heat exchanger (9) is directed toward the first adsorber (3) and the second refrigerant discharged from the indoor heat exchanger (9) A second direction control valve (34) for controlling the fluid in the direction toward the second adsorber (5);
In the first mode, the second refrigerant of the indoor heat exchanger (9), which is conveyed by the second directional control valve (34), is introduced into the first adsorber (3) A third directional control valve (35) for introducing the engine cooling water of the engine (22) conveyed by the first directional control valve (32) into the first adsorber (3);
In the first mode, the engine cooling water of the engine (22) fed by the first directional control valve (32) is introduced into the second adsorber (5). In the second mode, A fourth direction control valve (37) for introducing the second refrigerant of the indoor heat exchanger (9) conveyed by the control valve (34) into the second adsorber (5);
In the first mode, the second refrigerant discharged from the first adsorber (3) is introduced into the internal flow passage (1a) of the evaporator (1). In the second mode, the first adsorber A fifth direction control valve (38) for returning the discharged engine cooling water to the engine (22);
The second mode is a mode in which the engine coolant discharged from the second adsorber (5) is returned to the engine (22) during the first mode, and the second coolant discharged from the second adsorber And a sixth directional control valve (39) for introducing the air into the internal flow path (1a) of the evaporator (1). 4. The method according to any one of claims 1 to 3,
Further comprising a radiator (10) for introducing and circulating the cold fluid of the condenser (7) in which the first refrigerant has been condensed, and then returning the refrigerant to the condenser (7) for circulation.

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