JP2020085257A - Header for heat exchanger, heat exchanger, outdoor unit, and air conditioner - Google Patents

Abstract

To provide a header which enables a refrigerant to be distributed into each heat transfer pipe equally or at a preferable ratio at lower manufacturing costs, and to provide a heat exchanger, an outdoor unit, and an air conditioner.SOLUTION: A header for a heat exchanger includes: a housing 12 with which heat transfer pipes are connected; a partition member 16 which partitions an interior of the housing 12 into a heat transfer pipe side from the opposite side; first chambers 41, each of which is provided at the heat transfer pipe side of the partition member 16 and connected with the heat transfer pipes and into which a refrigerant flows; second chambers 42, each of which is provided below the first chamber 41 at the heat transfer pipe side of the partition member 16 and forms a space with which the heat transfer pipe is connected; third chambers 43, each of which is a space located at the opposite side of the heat transfer pipe side of the partition member 16 and at the back side of the first chamber 41 and the second chambers 42; first openings 25a provided at the partition member 16 and allowing communication between the first chamber 41 and the third chamber 43; and second openings 25b provided at the partition member 16 and allowing communication between each second chamber 42 and the third chamber 43.SELECTED DRAWING: Figure 8

Description

The present invention relates to a heat exchanger header, a heat exchanger, an outdoor unit, and an air conditioner.

As background art of this technical field, there is JP-A-2017-133820 (Patent Document 1). In this publication, "a main header chamber that extends in the vertical direction and a plurality of sub-header chambers that are horizontally branched from the main header chamber and are arranged side by side in the vertical direction are provided, and a refrigerant that flows into the main header chamber is provided. Is a header for inflowing into the refrigerant pipes respectively connected to the plurality of sub-header chambers, wherein the main header chamber horizontally flows the refrigerant in a gas-liquid mixed state into the inside of the main header chamber. And a flow direction changing mechanism which is provided so that the refrigerant flowing out from the refrigerant inflow hole collides with the refrigerant inflow hole and changes the flow direction of the refrigerant up and down." (see summary). ..

JP, 2017-133820, A

Patent Document 1 describes a header of a heat exchanger of an air conditioner. However, the technique of Patent Document 1 requires many parts and a complicated structure in order to evenly distribute the refrigerant from the header to the heat transfer tubes, and has a problem of high manufacturing cost.

Therefore, the present invention provides a header for a heat exchanger, a heat exchanger, an outdoor unit, and an air conditioner that can distribute the refrigerant to each heat transfer tube evenly or at a desired ratio at a low manufacturing cost. Is an issue.

In order to solve the above problems, one aspect of the present invention is a housing to which a heat transfer tube is connected, a partition member that partitions the inside of the housing into the heat transfer tube side and an opposite side thereof, and the transfer of the partition member. A first chamber that is provided on the heat pipe side and is connected to one or more heat transfer pipes and into which the refrigerant flows, and a heat transfer pipe that is provided below the first chamber on the heat transfer pipe side of the partition member. A second chamber which is one or a plurality of spaces connected to each other, and a third chamber which is a space on the opposite side of the first chamber and the second chamber on the side opposite to the heat transfer tube side of the partition member, A first opening provided in the partition member for communicating the first chamber and the third chamber, and a second opening provided in the partition member for communicating the second chamber with the third chamber Equipped with.

According to the present invention, it is possible to provide a header for a heat exchanger, a heat exchanger, an outdoor unit, and an air conditioner that can evenly distribute or distribute a refrigerant to each heat transfer tube at a low manufacturing cost. You can

Problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

It is a systematic diagram which shows the whole structure of the air conditioner which concerns on one Example of this invention. It is a perspective view showing a schematic structure of an outdoor unit concerning one example of the present invention. It is a front view of the heat exchanger which concerns on one Example of this invention. It is a perspective view showing the appearance of the 1st header concerning one example of the present invention. It is an exploded perspective view of the 1st header concerning one example of the present invention. It is the front view which looked at the partition member of the 1st header concerning one example of the present invention from the heat transfer tube side. It is a side view of the partition member which concerns on one Example of this invention. It is the rear view which looked at the partition member which concerns on one Example of this invention from the opposite side of the heat transfer tube. It is a front view of the 1st header concerning one example of the present invention. FIG. 7B is a sectional view taken along line AA of FIG. 7A. It is a perspective view of the upper part in the 1st header concerning one example of the present invention which cut away a part of upper part of a main case.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a system diagram showing an overall configuration of an air conditioner 100 according to this embodiment. The air conditioner 100 includes a compressor 131, a four-way valve 132, an indoor heat exchanger 101, an expansion valve 103, an outdoor heat exchanger 1 (heat exchanger), etc., and each member is connected by a pipe 121. The indoor heat exchanger 101 and the indoor fan 102 are provided in the indoor unit 108. The compressor 131, the four-way valve 132, the expansion valve 103, the outdoor heat exchanger 1, and the outdoor fan 107 are provided in the outdoor unit 105. The expansion valve 103 may be provided in the indoor unit 108, or may be provided in both the indoor unit 108 and the outdoor unit 105.

The compressor 131 is a device that drives a compressor motor to compress a low-temperature low-pressure gas refrigerant and discharge it as a high-temperature high-pressure gas refrigerant.

The four-way valve 132 is a valve that switches the flow path of the refrigerant according to the operation mode of the air conditioner 100.

The expansion valve 103 is a valve that decompresses the refrigerant condensed in the "condenser" (one of the outdoor heat exchanger 1 and the indoor heat exchanger 101 depending on the type of air conditioning operation). The refrigerant decompressed in the expansion valve 103 is guided to the “evaporator” (the other one of the outdoor heat exchanger 1 and the indoor heat exchanger 101 depending on the type of air conditioning operation).

The indoor heat exchanger 101 is a heat exchanger that performs heat exchange between the refrigerant flowing through the outdoor heat exchanger 1 and the indoor air (air in the air-conditioned space) sent from the indoor fan 102.

The indoor fan 102 is a fan that sends indoor air to the indoor heat exchanger 101, and is installed near the indoor heat exchanger 101.

The outdoor heat exchanger 1 is a heat exchanger that performs heat exchange between the refrigerant flowing through the heat transfer tubes (FIG. 3) and the outdoor air sent from the indoor fan 102.

The outdoor fan 107 is a fan that sends outdoor air to the outdoor heat exchanger 1, and is installed near the outdoor heat exchanger 1.

A refrigeration cycle of the heat pump type air conditioner 100 will be described with reference to FIG. 1 by taking a heating operation as an example. In the air conditioner 100, the flow of the refrigerant during the heating operation is indicated by the solid arrow 141. The compressor 131 is a device that compresses a gas refrigerant, and the refrigerant that has become a high temperature/high pressure state in the compressor 131 is guided to the indoor heat exchanger 101 (condenser) in the indoor unit 108 via the four-way valve 132. Get burned. Then, the high temperature refrigerant flowing through the indoor heat exchanger 101 radiates heat to the indoor air supplied from the indoor fan 102, thereby warming the room. At this time, in the outdoor heat exchanger 1, the heat-deprived gas refrigerant gradually liquefies, and the supercooled liquid refrigerant at a temperature of several degrees Celsius lower than the saturation temperature flows out from the outlet of the indoor heat exchanger 101. To do.

Then, the liquid refrigerant flowing out from the indoor unit 108 becomes a gas-liquid two-phase refrigerant in a low temperature/low pressure state due to the expansion action when passing through the expansion valve 103. The low-temperature low-pressure gas-liquid two-phase refrigerant is guided to the outdoor heat exchanger 1 (evaporator) in the outdoor unit 105. Then, the low-temperature refrigerant flowing in the heat transfer tube of the outdoor heat exchanger 1 absorbs heat from the outside air supplied from the outdoor fan 107, so that the dryness of the refrigerant (=mass velocity of gas refrigerant/(mass velocity of liquid refrigerant) + Mass velocity of gas refrigerant)) is increased. At the outlet of the outdoor heat exchanger 1, the refrigerant is gasified and returned to the compressor 131 in a state where the degree of superheat is increased by about several degrees Celsius. The heating operation of the air conditioner 100 is realized by the series of refrigeration cycles described above.

On the other hand, the flow of the refrigerant during the cooling operation is shown by the broken line arrow 142. During the cooling operation, the four-way valve 132 is switched to form a refrigeration cycle in which the refrigerant circulates in the direction of the broken arrow 142. In this case, the indoor heat exchanger 101 acts as an evaporator, and the outdoor heat exchanger 1 acts as a condenser. The cooling operation of the air conditioner 100 is realized by this series of refrigeration cycles.

The air conditioner 100 may be realized as a device dedicated to cooling operation or may be realized as a device dedicated to heating operation. In these cases, the four-way valve 132 becomes unnecessary.

FIG. 2 is a perspective view showing a schematic configuration of the outdoor unit 105 according to this embodiment. As described above, the compressor 131 is housed in the outdoor unit 105, and a four-way valve 132, an expansion valve 103, and an outdoor fan 107 are provided, which are not shown. In addition, the outdoor heat exchanger 1 is driven by the outdoor fan 107 to ventilate the outside air, thereby exchanging heat between the outside air and the refrigerant.

Next, the outdoor heat exchanger 1 according to the present embodiment will be described in detail. FIG. 3 is a front view of the outdoor heat exchanger 1. In FIG. 3, for convenience, the outdoor heat exchanger 1 is illustrated as a straight line in the left and right longitudinal directions, but when used as the outdoor heat exchanger 1, it is L-shaped as shown in FIG. It is generally bent in a letter shape or the like and stored in the outdoor unit 105. Further, in FIG. 3, for convenience, the length of the outdoor heat exchanger 1 is cut out and shortened.

The outdoor heat exchanger 1 is provided on one end side in the longitudinal direction of the outdoor heat exchanger 1, and has a first header 2 (a header for a heat exchanger) into which a refrigerant flows, and a longitudinal direction of the outdoor heat exchanger 1. And a second header 3 which is provided on the other end side of which the refrigerant flows out. In the outdoor heat exchanger 1, the first header 2 and the second header 3 are connected to both ends of the fins 5 which are continuously arranged, and the longitudinal direction of the first header 2 and the second header 3 (in FIG. 3). A plurality of heat transfer tubes 4 are arranged in the vertical direction). As the heat transfer tube 4, it is preferable to use a flat heat transfer tube or the like having a flat cross section in the radial direction and having an inside divided into a large number of passages through which a refrigerant flows. The outdoor heat exchanger 1 includes a large number of fins 5. The fins 5 are thin plate-shaped members that are respectively laid over the heat transfer tubes 4 and connected to the heat transfer tubes 4, and that a large number of fins 5 are arranged in the longitudinal direction of the heat transfer tubes 4 (the horizontal direction in FIG. 3 ).

The first header 2 and the second header 3 are long members having, for example, a rectangular radial cross-section, and the first header 2 has a plurality of members (six in the example of FIG. The invention is not limited to this), and a refrigerant inlet 11 is provided. Although not shown, the second header 3 is provided with a refrigerant outlet. As will be described later, the first header 2 distributes the refrigerant flowing into the first header 2 and sends the refrigerant to the inlets of the heat transfer tubes 4, and the refrigerant flowing out of the outlets of the heat transfer tubes 4 joins at the second header 3 to be combined with each other. Flows out of the exit.

Here, in the technique of Patent Document 1 described above, many components and a complicated structure are required to evenly distribute the refrigerant from the header to each heat transfer tube, and there is a problem that the manufacturing cost is high. Therefore, in the outdoor heat exchanger 1 of the present embodiment, the structure and manufacturing method of the first header 2 can be devised so that the distribution of the refrigerant to each heat transfer tube can be made uniform or at a desired ratio at a low manufacturing cost. I am trying. In the following, the structure and the effect of the first header 2 will be described in detail.

FIG. 4 is a perspective view showing the outer appearance of the first header 2. As described above, the outer shape of the housing 12 of the first header 2 is rectangular in the radial cross section and long in the vertical direction as described above. On the surface 12a of the housing 12 on the heat transfer tube 4 side, heat transfer tube fixing holes 13 for inserting and fixing the heat transfer tubes 4 are arranged vertically at equal intervals by the number of the heat transfer tubes 4. On the surface 12b adjacent to the surface 12a, a plurality of refrigerant inlets 11 formed of, for example, round holes, six in the case of the present embodiment, as described above, are provided at the upper and lower sides, for example, at equal intervals.

FIG. 5 is an exploded perspective view of the first header 2. The first header 2 includes a main housing 14, a back plate 15, and a partition member 16. The main housing 14 is a plate material having a "[" shape in a radial cross-sectional shape, and includes a surface 12a and two surfaces 12b and 12c adjacent to the surface 12a. As described above, the surface 12b is provided with a plurality of refrigerant inlets 11. The back plate 15 is fitted and joined to the opening 14d of the main housing 14. A partition member 16 is housed between the main housing 14 and the back plate 15, and the partition member 16 is joined to the main housing 14 and the back plate 15. The partition member 16 is a member that partitions the inside of the housing 12 into the heat transfer tube 4 side and the opposite side.

6A is a front view of the partition member 16 viewed from the heat transfer tube 4 side, FIG. 6B is a side view of the partition member 16, and FIG. 6C is a rear view of the partition member 16 viewed from the opposite side of the heat transfer tube 4. .. The partition member 16 includes a central partition plate 21 that partitions the inside of the housing 12 into the heat transfer tube 4 side and the opposite side thereof and extends from the upper end to the lower end of the internal space of the first header 2. A plurality of vertically arranged partition plates 22 extend from the central partition plate 21 toward the heat transfer tube 4 side, and a tip end portion of the partition plate 22 is joined to an inner peripheral surface of the main housing 14. Further, a plurality of partition plates 23, which are vertically arranged, extend from the surface of the central partition plate 21 on the opposite side to the opposite side of the heat transfer tube 4, and the tip portion of the partition plate 23 is a spine. It is joined to the inner peripheral surface of the plate 15.

As the partition plates 22, a plurality of partition plates 22 are arranged at the upper part of the heat transfer tube fixing holes 13 at the upper part of the heat transfer tube fixing holes 13 at the upper part and the lower part in the present embodiment. And a lower partition plate 22b (see also FIG. 7B). The upper partition plate 22a located at the uppermost part of the first header 2 serves as the top plate of the first header 2, and the lower partition plate 22b located at the lowermost part serves as the bottom plate of the first header 2. Among the partition plates 22 located at an intermediate height between the upper partition plate 22a and the lower partition plate 22b which are the top plate and the bottom plate, one partition plate 22 is an upper partition plate 22a and a lower partition plate 22b. Is also used as.

Further, between one upper partition plate 22a and one lower partition plate 22b located immediately below it, one or a plurality of partition plates 22 are provided, and two are provided in this embodiment (an example, There is an intermediate partition plate 22c (not limited to two sheets). Of the two intermediate partition plates 22c, the intermediate partition plate 22c located at the top has a height between the second and third heat transfer tube fixing holes 13 located below the upper partition plate 22a. The main housing 14 is located at the front end and is joined to the main housing 14 (see also FIG. 7B). Of the two intermediate partition plates 22c, the intermediate partition plate 22c located at the bottom is at the height between the heat transfer tube fixing holes 13 which are the third and fourth from the bottom of the upper partition plate 22a. The main housing 14 is located at the front end and is joined to the main housing 14 (see also FIG. 7B).

The partition plate 23 extends from the surface of the central partition plate 21 opposite to the heat transfer tube 4 side toward the back plate 15. The height of the partition plate 23 is the same as the height of the upper partition plate 22a and the lower partition plate 22b. Therefore, the partition plates 23 are also provided above and below each of the four heat transfer tube fixing holes 13 that are continuous in the vertical direction. As with the partition plate 22, the partition plate 23 is an example, and is not limited to four, but it is desirable that the partition plate 23 has the same height as the upper partition plate 22a and the lower partition plate 22b.

In the central partition plate 21, in the section from one upper partition plate 22a to the lower partition plate 22b immediately below it, a plurality of holes arranged vertically (two in this embodiment, respectively, Is not limited to this), and the first opening 25a and the second opening 25b penetrate therethrough. With the first opening 25a and the second opening 25b, the central partition plate 21 of the partition member 16 communicates with the space between the heat transfer tube 4 side and the opposite side. Of these four holes in the section from one upper partition plate 22a to the lower partition plate 22b immediately below, the upper two configure the first opening 25a and the lower two configure the second opening 25b. To do. In this embodiment, the first and second openings 25a and 25b are both circular, but the shape of these holes is not limited to circular. Also, of the two second openings 25b, the upper one is larger in size than the lower one. The size of the upper second opening 25b is larger than the size of the two first openings 25a. The sizes of the first and second openings 25a and 25b are also examples and do not limit the present invention. As an example of a method of manufacturing the partition member 16, aluminum can be formed by extrusion molding and punching. Alternatively, it can be manufactured by casting aluminum.

7A is a front view of the first header 2, and FIG. 7B is a sectional view taken along line AA of FIG. 7A. FIG. 7A shows a part of the intermediate portion in the longitudinal direction by cutting out. The first header 2 configured by combining and joining the main housing 14, the back plate 15, and the partition member 16 as described above is composed of a plurality of blocks 31 each having substantially the same configuration. In the example of FIG. 7B, the first header 2 is composed of six blocks 31 arranged in the vertical direction, but six is merely an example, and may be five or less or seven or more.

The structure of each block 31 will be described. Each adjacent block 31 is partitioned by an upper partition plate 22a (lower partition plate 22b). In each block 31, the space surrounded by the upper partition plate 22 a, the intermediate partition plate 22 c immediately below the upper partition plate 22 a, the central partition plate 21, and the main housing 14 constitutes a first chamber 41. Two upper and lower heat transfer tube fixing holes 13 are formed in the main housing 14 portion of each first chamber 41, and an end portion of the heat transfer tube 4 is joined to each heat transfer tube fixing hole 13. The number of heat transfer tubes 4 connected to the first chamber 41 is not limited to two, and may be one or three or more. Further, a refrigerant inlet 11 is formed in the main housing 14 portion of each first chamber 41. The height of the inlet 11 is, for example, the height of the intermediate position of the two heat transfer tubes 4 connected to each first chamber 41.

Immediately below each first chamber 41 is a space surrounded by the upper intermediate partition plate 22c of each block 31, the lower intermediate partition plate 22c, the central partition plate 21, and the main housing 14. Two chambers 42 are arranged. Immediately below the second chamber 42, there is another second chamber 42 which is a space surrounded by the lower intermediate partition plate 22c, the lower partition plate 22b, the central partition plate 21, and the main housing 14. Are arranged. As described above, immediately below each of the first chambers 41, the two second chambers 42 arranged vertically are arranged. In the main housing 14 portion of each second chamber 42, one heat transfer tube fixing hole 13 is formed, and each heat transfer tube fixing hole 13 is joined to one end of each heat transfer tube 4. It Note that the number of the second chambers 42 is two, which is merely an example, and the number of the second chambers 42 may be one or three or more. Further, the number of heat transfer tubes 4 connected to each second chamber 42 is not limited to one, and may be two or more.

In each block 31, a single third chamber 43 is provided on the opposite side of the central partition plate 21 of each first chamber 41 and each second chamber 42 from the heat transfer tube 4 side. Each third chamber 43 is a space surrounded by the upper and lower partition plates 23, the central partition plate 21, the back plate 15 and the main housing 14.

In each block 31, the two first openings 25a communicate the first chamber 41 and the third chamber 43 behind it. In each block 31, the second opening 25b is such that one on the upper side communicates with the second chamber 42 on the upper side and the third chamber 43, and one on the lower side is the second chamber 42 and the third chamber on the lower side. 43 in communication with each other.

Next, the function and effect of the first header 2 will be described.

FIG. 8 is a perspective view of the upper portion of the first header 2 in which a part of the upper portion of the main housing 14 is cut away. FIG. 8 mainly shows the uppermost block 31 of the first header 2. The arrow 51 indicates the flow path of the refrigerant flowing into the first chamber 41 from the refrigerant inlet 11 (FIG. 7B). The refrigerant flowing into the first chamber 41 is turned by the inner wall surface of the first chamber 41, and a part of the refrigerant directly flows to the two heat transfer tubes 4 connected to the first chamber 41 as shown by an arrow 52. Inflow. The remaining part of the refrigerant passes through the two first openings 25a and flows into the third chamber 43 as shown by an arrow 53. The refrigerant flowing into the third chamber 43 flows down in the third chamber 43 as indicated by an arrow 54. Then, the refrigerant flows into the two second chambers 42 through the two second openings 25b as shown by the arrows 55, and the heat transfer tubes 4 connected to the second chambers 42 are connected to the heat transfer tubes 4 respectively. Flow into. In this way, in each block 31, the refrigerant is distributed and flows into each heat transfer tube 4 connected to the block 31.

Here, two upper and lower second chambers 42 are prepared. Then, since the refrigerant flowing into the third chamber 43 easily falls under the third chamber 43 due to gravity, more of the refrigerant is discharged to the lower second chamber 42 of the two second chambers 42. It easily flows in through the second opening 25b. Therefore, the heat transfer tube 4 connected to the lower second chamber 42 is more likely to flow into the heat transfer tube 4 than the heat transfer tube 4 connected to the upper second chamber 42. Therefore, by increasing the size of the second opening 25b formed in the second chamber 42 located above the second chamber 42 located below, the refrigerant flowing into the second chamber 42 located above is prevented. We try to increase the inflow. This makes it possible to make the amounts of the refrigerants flowing into the two heat transfer tubes 4 connected to the upper and lower second chambers 42 evenly close to each other.

According to the first header 2 of the present embodiment, each block 31 is divided into a first chamber 41, a second chamber 42, and a third chamber 43, and the first opening 25a and the second opening 25b are formed. It is a simple configuration that only needs to be provided. Then, by selecting the sizes of the first opening 25a and the second opening 25b variously, it is possible to variously adjust the flow rate of the refrigerant flowing into each heat transfer tube 4 per unit time. That is, the flow rate of each heat transfer tube 4 can be made substantially equal, or the flow rate of the refrigerant flowing through the heat transfer tube 4 can be made different for some purpose.

Particularly, in the upper second chamber 42 and the lower second chamber 42 as in the present embodiment, the upper second chamber 42 has a larger size of the second opening 25b, and the lower second chamber 42 is larger. It is possible to prevent the refrigerant from concentrating on 42, and to make the flow of the refrigerant flowing in the upper and lower second chambers 42 substantially even. This makes it possible to make the flow rates of the refrigerant flowing into the heat transfer tubes 4 substantially equal in the upper second chamber 42 and the lower second chamber 42.

It should be noted that the present invention is not limited to the above-described embodiments, but includes various modifications. For example, the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described.

For example, although the outdoor heat exchanger 1 is provided with the first header 2 in the above embodiment, it may be used for the indoor heat exchanger 101.

1 heat exchanger (outdoor heat exchanger)
2 First header (header for heat exchanger)
3 2nd header 4 Heat transfer pipe 5 Fin 12 Housing 16 Partition member 25a 1st opening part 25b 2nd opening part 41 1st chamber 42 2nd chamber 43 3rd chamber 101 Indoor heat exchanger 103 Expansion valve 131 Compressor

Claims (5)

A case to which the heat transfer tube is connected,
A partition member for partitioning the inside of the housing into the heat transfer tube side and the opposite side thereof,
A first chamber provided on the heat transfer tube side of the partition member, connected to one or more heat transfer tubes, and into which a refrigerant flows;
A second chamber that is one or a plurality of spaces that are provided below the first chamber on the heat transfer tube side of the partition member and that are connected to one or a plurality of the heat transfer tubes, respectively.
A third chamber that is a space on the opposite side of the partition member from the heat transfer tube side, the space being the back side of the first chamber and the second chamber;
A first opening provided in the partition member to communicate the first chamber and the third chamber;
A header for a heat exchanger, comprising a second opening provided in the partition member, the second opening communicating with each of the second chambers and the third chamber. A plurality of the second chambers are vertically arranged below the first chamber,
The header according to claim 1, wherein each second opening communicating with each of the second chambers has a larger diameter size as communicating with the second chamber above. A first header which is a header for the heat exchanger according to claim 1 or 2, wherein the refrigerant flows in;
A second header through which the refrigerant flows,
A heat transfer tube in which the first header and the second header are respectively connected to both ends, and a plurality of heat transfer tubes are arranged in the longitudinal direction of the first header and the second header;
A heat exchanger comprising: a plurality of fins, which are respectively laid over and connected to the respective heat transfer tubes, and arranged in a longitudinal direction of the respective heat transfer tubes. A compressor for compressing the refrigerant,
An outdoor unit comprising: the heat exchanger according to claim 3, which performs heat exchange between the outside air and the refrigerant. A compressor for compressing the refrigerant,
An expansion valve for decompressing the refrigerant,
An outdoor heat exchanger that performs heat exchange between the refrigerant and outdoor air,
An indoor heat exchanger is provided for heat exchange between the refrigerant and indoor air,
An air conditioner that is the heat exchanger according to claim 3, wherein at least one of the outdoor heat exchanger and the indoor heat exchanger.

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