KR20150039989A - An air conditioner - Google Patents

Abstract

The present invention relates to an air conditioner including a compressor for compressing a refrigerant, a condenser for condensing the refrigerant compressed in the compressor, a supercooling device for allowing the refrigerant passed through the condenser to be supercooled, and an evaporator for evaporating the refrigerant through the supercooler, A first flow path formed inside the supercooling device and guiding the refrigerant having passed through the condenser to flow into the evaporator, a second flow path for heat exchange with the first flow path in the supercooling device and for introducing the refrigerant into the compressor, And a heat exchanging tube contacting at least one side of the main tube with the main tube. The present invention relates to an air conditioner,
The present invention has the advantage that the heat exchange efficiency between the refrigerants is improved because the substantial heat exchange area is improved.

Description

An air conditioner

The present invention relates to an air conditioner.

The air conditioner is an appliance for keeping the indoor air in the most suitable condition according to the purpose and purpose. For example, in the summer, the room is controlled by a cool air condition, while in winter the room is controlled by a warm heating condition, by the humidity of the room, and by the clean air of the room.

In detail, the air conditioner is driven by a refrigeration cycle for compressing, condensing, expanding and evaporating the refrigerant, thereby performing the cooling or heating operation of the indoor space.

The air conditioner may be divided into a separate type air conditioner in which the indoor unit and the outdoor unit are separated from each other and an integrated type air conditioner in which the indoor unit and the outdoor unit are combined into one unit depending on whether the indoor unit and the outdoor unit are separated.

The outdoor unit includes an outdoor heat exchanger that exchanges heat with outdoor air. The indoor unit includes an indoor heat exchanger that performs heat exchange with indoor air. The air conditioner can be operated so as to be switchable to the cooling mode or the heating mode.

When the air conditioner is operated in the cooling mode, the outdoor heat exchanger functions as a condenser and the indoor heat exchanger functions as an evaporator. On the other hand, when the air conditioner operates in the heating mode, the outdoor heat exchanger functions as an evaporator and the indoor heat exchanger functions as a condenser.

On the other hand, the air conditioner further includes a supercooling device for supercooling the refrigerant condensed in the condenser before it is expanded. The supercooler is configured to perform heat exchange between a main refrigerant circulating in a refrigeration cycle and a branched refrigerant partially branched from the main refrigerant. By the heat exchange between the main refrigerant and the branch refrigerant, the main refrigerant can be supercooled.

According to the conventional supercooler, the pipe through which the main refrigerant and the branch refrigerant flow is constituted by a spiral tube, and the subcooling of the main refrigerant is performed through the heat exchange by the contact of the tube.

However, when the piping of the heat exchanger is composed of a spiral tube, the heat exchange area between the main refrigerant and the branch refrigerant is limited and the heat exchange efficiency between the main refrigerant and the branch refrigerant is lowered, .

SUMMARY OF THE INVENTION It is an object of the present invention to provide an air conditioner including a supercooling device having improved heat exchange efficiency between refrigerants.

An air conditioner according to an exemplary embodiment of the present invention includes a compressor for compressing refrigerant, a condenser for condensing the refrigerant compressed in the compressor, a supercooling device for supercooling the refrigerant passing through the condenser, and an evaporator for evaporating the refrigerant through the supercooler 1. An air conditioner comprising an evaporator, the air conditioner comprising: a first flow path formed in the supercooling device, the first flow path guiding the refrigerant passing through the condenser into the evaporator; A second flow path for heat exchange with the first flow path inside the supercooling apparatus, and for introducing the refrigerant into the compressor; And a main tube forming the first flow path on the inner side and a main tube forming the second flow path on the outer side and a heat exchange tube contacting the main tube on at least one side may be provided on the second flow path.

The main tube may have a cylindrical shape, and the heat exchange tube may have a cylindrical shape having a smaller diameter than the main tube.

In addition, the main tube may be cylindrical, and the heat exchange tube may surround the outer circumference of the main tube.

The heat exchange tubes may be spaced apart from each other.

The supercooling device may include a supercooling body having the main tube and the heat exchange tube disposed on the inner side and forming a second flow path on the space separated from the main tube.

The heat exchange tube may be spaced apart from the supercooling body.

In addition, the above-mentioned refrigerant may flow on the first flow path, and the single-phase refrigerant may flow on the second flow path.

An air conditioner according to an example of the present invention includes: a compressor for compressing a refrigerant; A condenser for condensing the refrigerant having passed through the compressor; And a supercooler disposed at an outlet side of the condenser, wherein the supercooler includes a main body in which heat exchange is performed between the first refrigerant and the second refrigerant; A first inlet for allowing the first refrigerant to flow into the main body; A second inflow portion for allowing inflow of the second refrigerant into the main body; And a main tube having an inner side communicating with the first inlet portion and an outer side communicating with the second inlet portion, and a plurality of heat exchange tubes for heat-exchanging with the main tube may be provided outside the main tube .

A first refrigerant pipe communicating the condenser and the first inlet; And a second refrigerant pipe branched from the first refrigerant pipe and communicating with the second inflow portion, and an expansion device may be provided on the second refrigerant pipe.

Further, an expansion device for depressurizing the refrigerant is provided at the outlet side of the supercooling device. A first discharge portion through which the first refrigerant flowing in the main body flows and is heat-exchanged; And a second discharge portion through which the second refrigerant heat-exchanged flows through the main body, the first discharge portion communicating with the expansion device, and the second discharge portion communicating with the compressor.

According to the present invention, since the substantial heat exchange area is improved through the heat exchange tube, heat exchange efficiency between refrigerants is improved. In particular, compared with a spiral tube having the same length as the spiral tube, the heat exchange efficiency can be improved by about 3 to 4 times.

Therefore, the supercooling efficiency is also increased, and sufficient subcooling is ensured, so that the operation efficiency of the refrigeration cycle can be increased.

Further, by injecting (injecting) the refrigerant that has passed through the supercooling device into the compressor, it is possible to increase the amount of refrigerant circulating through the compressor. Accordingly, there is an advantage that the heating capacity can be improved.

Furthermore, since the length of the supercooling device can be shortened in order to secure the same amount of heat exchange as compared with the prior art, the material cost can be reduced.

1 is a system diagram showing the configuration of an air conditioner according to an example of the present invention.
2 is a perspective view showing an appearance of a supercooling apparatus of an air conditioner according to an example of the present invention.
3 is a cross-sectional view taken along line I-I 'of FIG.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals even though they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected,""coupled," or "connected. &Quot;

1 is a system diagram showing a configuration of an air conditioner according to an example of the present invention.

Referring to FIG. 1, a refrigerating cycle in which refrigerant circulates is driven in an air conditioner 1 according to an embodiment of the present invention. In the air conditioner (1), cooling or heating operation may be performed according to the circulation direction of the refrigerant.

When the air conditioner 1 performs the heating operation, the air conditioner 1 is provided with a compressor 10 for compressing the refrigerant and a compressor 10 for separating the liquid refrigerant in the refrigerant sucked into the compressor 10 Liquid separator 40 and an indoor heat exchanger 20 for exchanging the refrigerant compressed in the compressor 10 with indoor air and an outdoor expansion device for expanding the refrigerant condensed in the indoor heat exchanger 20 An outdoor heat exchanger 30 for allowing the expanded refrigerant to heat-exchange with the outside air, a four-way valve 50 for controlling the circulation direction of the refrigerant discharged from the compressor 10, And a refrigerant pipe (60) for guiding the flow.

Blower fans 25 and 35 are provided at one side of the indoor heat exchanger 20 and the outdoor heat exchanger 30 for blowing a fluid (air) to be heat-exchanged with the refrigerant. The air blowing fan (25, 35) includes an indoor fan (25) and an outdoor fan (35).

On the other hand, when the cooling operation is performed under the control of the four-way valve 50, the circulation direction of the refrigerant is opposite to the refrigerant circulation direction in the above-described heating operation. That is, the refrigerant passes through the compressor (10) and the outdoor heat exchanger (30), is expanded in the indoor expansion device (28), and is heat-exchanged in the indoor heat exchanger (20).

When the air conditioner 1 performs the cooling operation, the refrigerant is condensed in the outdoor heat exchanger (30) between the outdoor heat exchanger (30) and the indoor heat exchanger (20) A supercooling device 100 (supercooler) is provided.

The refrigerant pipe 60 includes a main inflow portion 71 for introducing the main refrigerant into the supercooling apparatus 100 and a main discharge portion 72 for guiding the discharge of the main refrigerant through the subcooling device. The main refrigerant is a refrigerant flowing through the refrigerant pipe 60, and may be referred to as "first refrigerant ".

The air conditioner 1 includes an injection flow path 150 through which at least a portion of the first refrigerant in the refrigerant pipe 60 is branched and injected into the compressor 10. Herein, the refrigerant pipe 60 is referred to as a "first refrigerant pipe 60", and the injection channel 150 branched from the first refrigerant pipe 60 may be referred to as "second refrigerant pipe 150" . The injection channel 150 is branched from the refrigerant pipe 60 and connected to the supercooling apparatus 100. At least a portion of the refrigerant branched in the first refrigerant is called "second refrigerant ".

The injection channel 150 includes an injection inlet 151 through which branched refrigerant flows into the subcooling apparatus 100. The injection inlet 151 is understood to be an inlet defined at a different location from the main inlet 71. [

The injection flow path 150 includes an injection discharge unit 152 for guiding the refrigerant introduced through the injection inlet 151 to flow out after passing through the subcooling apparatus 100. The injecting and discharging portion 152 is an outlet portion defined at a different position from the main discharging portion 72. The refrigerant discharged through the injecting and discharging portion 152 is injected into the compressor 10.

In this way, at least a part of the refrigerant flowing through the refrigerant pipe (60) is passed through the supercooling device (100) and introduced into the compressor (10) to increase the amount of refrigerant circulating in the compressor or refrigerant system .

The injection flow path (150) includes an injection expansion device (155) for expanding the second refrigerant. The second refrigerant is changed to a lower temperature and a lower pressure than the first refrigerant while passing through the injection expansion device 155. The subcooling device 100 can subcool the first refrigerant while exchanging heat with the first refrigerant.

The first subcooled refrigerant in the supercooling apparatus 100 is expanded while passing through the indoor expansion device 28 and can be evaporated in the indoor heat exchanger 20. [

The refrigerant flow in the supercooling apparatus during the cooling operation of the air conditioner has been described above. However, when the four sides 50 are adjusted to perform the heating operation, the refrigerant flow is opposite to the above.

In detail, the refrigerant condensed in the indoor heat exchanger 20 flows into the supercooling apparatus 100 through the main discharge portion 72 and flows out to the main inlet portion 71. The outflowed first refrigerant is expanded in the outdoor expansion device (38) and evaporated in the outdoor heat exchanger (30).

A part of the first refrigerant flowing from the main inflow part 71 is branched by the injection flow path 150 and is expanded in the inflation expansion device 155 to be supplied to the supercooling device 100 ). In the supercooling apparatus 100, the first refrigerant and the second refrigerant are heat-exchanged. In the heat exchange process, the first refrigerant is sub-cooled and the second refrigerant is vaporized and injected into the compressor 10.

Hereinafter, the configuration of the subcooling apparatus 100 will be described with reference to the drawings.

FIG. 2 is a perspective view showing an outer appearance of a supercooling apparatus of an air conditioner according to an exemplary embodiment of the present invention, and FIG. 3 is a cross-sectional view taken along line I-I 'of FIG.

2 through 3, the supercooling apparatus 100 of an air conditioner according to an exemplary embodiment of the present invention includes a supercooling main body 110, a casing 120, a main tube 130, and a heat exchange tube 140, . ≪ / RTI >

The supercooling body 110 forms a flow space through which the first refrigerant and the second refrigerant flow. In addition, the supercooled main body 110 may be formed as a hollow pipe having an empty interior.

The casing 120 may be provided at both ends of the supercooling body 110, respectively. In this case, the casing 120 provided at one side of the supercooled main body 110 is referred to as a "first casing 120a" and the casing 120 provided at the other side of the supercooled main body 110 is referred to as a " Quot; 120b ".

The casing 120 includes a hollow, and the hollow may be fixed in such a manner that one end of the supercooling body 110 is inserted. When the supercooling body 110 is inserted and fixed to the hollow of the casing 120 as described above, the branching section 111 described later is formed in the inner space of the first casing 120a, and the branching section 111 of the second casing 120b In the inner space, a joining portion 112 to be described later is formed. The supercooling main body 110 and the casing 120 may be formed integrally with each other. However, the supercooling main body 110 and the casing 120 may be integrally formed.

The subcooling apparatus 100 is provided with a main inlet 71 provided at one side of the subcooling main body 110 and guiding the inflow of the first refrigerant during a cooling operation and a main inlet 71 provided at the other side of the subcooling main body 110, And a main discharge portion 72 for guiding the outflow of the first refrigerant.

The supercooling apparatus 100 is provided with an injection inlet 151 provided at one side of the outer circumferential surface of the supercooling main body 110 to guide inflow of the second refrigerant and an injection inlet 151 provided at the other side of the outer circumferential surface of the supercooling main body 110 And an injection / discharge unit 152 for guiding the outflow of the second refrigerant.

The main inflow portion 71, the main inflow portion 72, the inflow inflow portion 151 and the injection inflow portion 152 may be provided at different positions on the outer surface of the supercooling main body 110. The main inflow portion 71 and the injection inflow portion 151 may be referred to as a "first inflow portion" and a "second inflow portion" in terms of inflow of the refrigerant, The injection / discharge section 152 may be referred to as "first discharge section" and "second discharge section"

The branched portion 111 formed inside the first casing 120a is communicated with the injection inflow portion 151 but is not communicated with the main inflow portion 71. [ The joint portion 112 formed inside the second casing 120b communicates with the injection discharge portion 152 but does not communicate with the main discharge portion 72. [ The second refrigerant flowing into the branched portion 111 through the injection inlet 151 flows on the outer side of the main tube 130 to be described later, Is injected into the joint portion (112) and then discharged through the injection / discharge portion (152). A plurality of heat exchange tubes 140 are provided outside the main tube 130 to divide the plurality of heat exchange tubes 140 into a plurality of channels so that the second refrigerant introduced through the injection inlet 151 is branched, And then discharged again to the injection and discharge unit 152. [0064] As shown in FIG.

The main tube 130 is provided inside the supercooling main body 110. In detail, the first refrigerant flowing through the main inlet portion 71 flows into the main tube 130 through the main discharge portion 72, and the injection inlet portion 151 And flows out through the injecting and discharging unit 152. [0086]

In this case, the main inlet portion 71, the inner side of the main tube 130, and the main discharge portion 72, which are the paths through which the first refrigerant flows, may collectively be referred to as a "first flow path 135" Quot; second flow path 113 "as the path through which the refrigerant flows, the injection inflow section 151, the outside of the main tube 130, and the injection discharge section 152. The first flow path 135 is formed inside the supercooling apparatus 100 and can be described as a flow path for guiding the refrigerant passing through the condenser to the evaporator. The refrigerant can be described as a flow path for allowing heat exchange with the refrigerant passing through the first flow path 135 and then flowing the heat exchanged refrigerant into the compressor 10. Here, if the air conditioner 1 is in the cooling operation mode, the indoor heat exchanger 20 becomes the evaporator, the outdoor heat exchanger 30 becomes the condenser, and if the air conditioner 1 is in the heating operation, (20) serves as a condenser and the outdoor heat exchanger (30) serves as an evaporator. That is, the above-described refrigerant flows through the first flow path 135, and the single-phase refrigerant flows through the second flow path 113.

Therefore, it is also possible to explain that the first flow path 135 is formed inside the main tube 130 and the second flow path 113 is formed outside the main tube 130. In addition, since the supercooling body 110 is disposed outside the main tube 130, it can be described that the second flow path 113 is formed in the space between the main tube 130 and the supercooling body 110.

A plurality of heat exchange tubes (140) are provided on the second flow path (113). The heat exchange tube 140 may be cylindrical and at least partially contact the main tube 130 to exchange heat with the main tube 130. For example, when the main tube 130 is cylindrical, the thermally-crossed tube 140 may be provided around the circumference of the main tube 130. At this time, each of the plurality of heat exchange tubes 140 may be spaced apart. In this case, heat exchange between the plurality of heat exchange tubes 140 can be prevented.

3, the heat exchange tube 140 can divide the second flow path 113 into a tube-inside second flow path 114 and a tube outside second flow path 115. In this case, the tube inner side second flow path 114 is provided by the number of the heat exchange tubes 140, and the tube outer side second flow path 115 is provided with the remaining portion excluding the space occupied by the heat exchange tube 140 on the second flow path 113 It becomes space.

The main tube 130 and the heat exchange tube 140 may be made of a metal with good thermal conductivity, and may be made of aluminum (Al), for example. In this case, the effect of reducing the material cost can also be described.

The main tube 130 and the heat exchange tube 140 are at least partially in contact with each other for heat conduction. The contact surface between the main tube 130 and the heat exchange tube 140 may be brazed. In this case, heat exchange efficiency between the heat exchange tube 140 and the main tube 130 can be improved.

Hereinafter, the operation of the air conditioner according to one example of the present invention will be described. Hereinafter, a case where the air conditioner according to the exemplary embodiment of the present invention is operated in the cooling mode will be described as an example, but the air conditioner may be applied to the case where the air conditioner is operated in the heating mode.

The refrigerant compressed and discharged from the compressor (10) flows to the outdoor heat exchanger (30) by the four sides (50). The refrigerant condensed in the outdoor heat exchanger 30 (gas-phase and liquid-phase mixture) flows into the main inlet portion 71 of the supercooling apparatus 100 through the first refrigerant pipe 60. A part of the refrigerant flowing through the first refrigerant pipe 60 flows through the second refrigerant pipe 150 branched from the first refrigerant pipe 60 and is expanded in the injection expansion device 155 to be supplied to the single- And then flows into the injection inlet 151 of the supercooling apparatus 100.

The first refrigerant flowing through the main inlet portion 71 flows through the first flow passage 135 which is an inner space of the main tube 130 and is discharged through the main discharge portion 72. The first refrigerant flows through the injection inlet portion 151, The second refrigerant flows through the second flow path 113, which is an outer space of the main tube 130, and is discharged through the injection / discharge unit 152. More specifically, the second refrigerant introduced through the injection inlet 151 flows into the branched portion 111 formed in the first casing 120a, and then flows into the branched portion 111 of the first casing 120a, And then discharged to the injection / discharge section 152. The injection section 152 is connected to the second section of the second casing 120b. At this time, heat exchange occurs between the first refrigerant flowing through the first flow path 135 and the second refrigerant flowing through the second flow path 113. In this process, the heat exchange tube 140 provided to contact at least part of the main tube 130 functions to expand the heat exchange area.

Hereinafter, the role of the heat exchange tube 140 will be described in more detail with reference to FIG. The second flow path 113 can be divided into the tube inner side second flow path 114 and the tube outer side second flow path 115 by the heat exchange tube 140 as previously mentioned. (B) In the case of the second refrigerant flowing through the tube-side second flow path 115, heat is transferred to the contacted heat exchange tube 140 or heat is transferred to the main tube 130. At this time, since the heat transferred to the heat exchange tube 140 spreads to the entire heat exchange tube 140, the portion where the heat exchange tube 140 and the main tube 130 are contacted is also transmitted (d). The heat transferred to the portion where the heat exchange tube 140 and the main tube 130 are contacted is transferred to the first refrigerant flowing inside the main tube 130 (e).

In the case of the second refrigerant flowing through the tube-inside second flow path 114, heat is transferred to the heat exchange tube 140 that is brought into contact with the tube (c). Since the heat transferred to the heat exchange tube 140 spreads to the entire heat exchange tube 140 as described above, the heat exchange tube 140 and the portion where the main tube 130 are contacted are also transferred (d) The heat transferred to the portion where the main tube 140 and the main tube 130 are contacted is transferred to the first refrigerant flowing inside the main tube 130 (e). That is, both the heat (a, c) transmitted by the second refrigerant to the heat exchange tube 140 and the heat (b) transmitted by the second refrigerant to the main tube 130 are used for heat exchange with the first refrigerant.

Accordingly, it is expected that the heat exchange efficiency is improved as compared with the case where the heat exchange tube 140 is not provided, and the heat exchange efficiency is improved by 3 to 4 times through a number of experiments.

The first refrigerant that has been heat-exchanged as described above is discharged to the main discharge portion 72 and flows to the compressor 10 through the indoor expansion device 28 and the indoor heat exchanger 20 to circulate the refrigerant cycle, Is injected into the injection section (152) and injected into the compressor (10) to circulate the cold cycle.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: supercooling device
110: supercooling body
120: casing
130: main tube
140: Heat exchange tube

Claims (10)

An air conditioner comprising: a compressor for compressing a refrigerant; a condenser for condensing the refrigerant compressed in the compressor; a supercooling device for supercooling the refrigerant passed through the condenser; and an evaporator for evaporating the refrigerant through the subcooler,
A first flow path formed in the supercooling device and guiding the refrigerant passing through the condenser to flow into the evaporator;
A second flow path for heat exchange with the first flow path inside the supercooling device, and for introducing the refrigerant into the compressor; And
The main tube forming the first flow path on the inner side and the main tube forming the second flow path on the outer side,
And a heat exchange tube contacting at least one side of the main tube is provided on the second flow path.
The method according to claim 1,
The main tube is cylindrical,
Wherein the heat exchange tube is a cylindrical shape having a smaller diameter than the main tube.
The method according to claim 1,
The main tube is cylindrical,
Wherein the heat exchange tube is provided on an outer circumferential surface of the main tube.
The method of claim 3,
Wherein the heat exchange tubes are spaced apart from each other.
The method according to claim 1,
The subcooling apparatus may further comprise:
And a supercooling main body having the main tube and the heat exchange tube disposed therein and forming a second flow path on a space separated from the main tube.
6. The method of claim 5,
Wherein the heat exchange tube is spaced apart from the supercooling body.
The method according to claim 1,
The refrigerant flows above the first flow path,
And the single-phase refrigerant flows on the second flow path.
A compressor for compressing the refrigerant;
A condenser for condensing the refrigerant having passed through the compressor; And
A supercooler disposed at an outlet side of the condenser,
In the subcooler,
A main body for performing heat exchange between the first refrigerant and the second refrigerant;
A first inlet for allowing the first refrigerant to flow into the main body;
A second inflow portion for allowing inflow of the second refrigerant into the main body; And
And a main tube having an inner side communicating with the first inflow portion and an outer side communicating with the second inflow portion,
And a plurality of heat exchange tubes for exchanging heat with the main tube are provided outside the main tube.
9. The method of claim 8,
A first refrigerant pipe communicating the condenser and the first inlet; And
Further comprising a second refrigerant pipe branched from the first refrigerant pipe and communicating with the second inflow portion,
And an expansion device is provided on the second refrigerant pipe.
9. The method of claim 8,
An expansion device for decompressing the refrigerant at an outlet side of the supercooling device;
A first discharge portion through which the first refrigerant flowing in the main body flows and is heat-exchanged; And
Further comprising a second discharge portion through which the second refrigerant having flowed in the main body flows and is heat-exchanged,
Wherein the first discharge portion is in communication with the expansion device,
And the second discharge portion communicates with the compressor.

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