JP2008267753A - Heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger having superior gas-liquid separation effect and capable of preventing waste of space, when it is disposed in an engine room. <P>SOLUTION: This heat exchanger 1 comprises a pair of tanks 2, 3, a heat exchange tube 4 and a fin 5. Both tanks 2, 3 are respectively divided into two headers 15, 17, 16, 18 by partitioning members 11, 12, to dispose a condensing portion 13 and a supercooling portion 14. A liquid-receiving portion mounting member 7 is fixed to the first tank 2, and two liquid-receiving tubes 8, 9 extending in the vertical direction are fixed to the liquid-receiving portion mounting member 7. The liquid-receiving portion mounting member 7 is provided with a first flow channel 27, communicating the header 15 at a first tank 2 side of the condensing portion and the refrigerant inflow-side liquid-receiving tube 7, and a second flow channel 28 communicating the header 17 at the first tank 2 side of the supercooling portion 14 and the refrigerant outflow-side liquid-receiving tube 9. Both the liquid-receiving tubes 8, 9 are made communicating with each other. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heat exchanger used in, for example, a refrigeration cycle constituting a car air conditioner.

  In this specification and claims, the top, bottom, left and right in FIGS. 1, 3, and 5 are respectively referred to as top and bottom and left and right. In addition, the back side (downstream side in the ventilation direction) of FIG. 1, FIG. 3, and FIG. 5 is the front, and the opposite side is the rear.

  In recent years, as a heat exchanger for a refrigeration cycle that constitutes a car air conditioner for the purpose of improving the ease of assembling to a vehicle body, a pair of vertically extending tanks that are spaced apart from each other, and between the two tanks A plurality of heat exchange tubes arranged in parallel at intervals in the vertical direction and having both ends connected to both tanks, fins arranged between adjacent heat exchange tubes, and either tank A fixed liquid receiving pipe mounting member and one vertical cylindrical liquid receiving pipe fixed to the liquid receiving pipe mounting member, and the refrigerant receiving pipe mounting member receives refrigerant from the one tank into the liquid receiving pipe. A refrigerant inflow path through which the refrigerant flows in and a refrigerant outflow path through which the refrigerant flows out from the liquid receiving pipe to the one tank are known (see Patent Document 1).

However, in the heat exchanger described in Patent Document 1, in order to improve the gas-liquid separation performance in the receiver body, it is necessary to increase the internal volume of the receiver body, and the diameter is in the ventilation direction of the tank. Since it becomes larger than the width or the length becomes longer than the length of the tank, when this heat exchanger is arranged in the engine room, there is a problem that a useless space is generated.
JP 11-2111275 A

  An object of the present invention is to provide a heat exchanger that can solve the above-described problems, obtain an excellent gas-liquid separation effect, and prevent the generation of useless space when arranged in an engine room. It is in.

  In order to achieve the above object, the present invention comprises the following aspects.

1) A pair of vertically extending tanks that are spaced apart from each other, and a plurality of heats that are arranged in parallel with a distance between the two tanks in the vertical direction and are connected to both tanks at both ends. In a heat exchanger comprising an exchange pipe and fins disposed between adjacent heat exchange pipes,
A liquid receiving part mounting member is fixed to any one of the first tanks, and a plurality of tubular liquid receiving parts extending in the vertical direction are fixed to the liquid receiving part mounting member, and a refrigerant flows into which refrigerant flows from the first tank. A side tubular liquid receiving part and a refrigerant outflow side tubular liquid receiving part from which the refrigerant flows out to the first tank are included, and the liquid receiving part mounting member allows the liquid inflow side tubular liquid receiving part and the first tank to pass through the first tubular liquid receiving part. 1 and a second flow path through the refrigerant outflow side tubular liquid receiving part and the first tank are formed, and the adjacent tubular liquid receiving parts are communicated with each other. The refrigerant that has flowed into the refrigerant inflow side tubular liquid receiving part through the flow path returns to the first tank from the refrigerant outflow side tubular liquid receiving part through the second flow path through all the tubular liquid receiving parts. Heat exchanger.

  2) The first tank to which the liquid receiving part mounting member is fixed is partitioned into two headers in the length direction of the first tank by the first partition member, and the other second tank is also formed by the second partition member. The two tanks are partitioned into two headers in the length direction of the second tank, both partition members are in the same position in the length direction of both tanks, and have a function as a capacitor on one side of both partition members. A condensing part is provided, and a supercooling part having a function as a supercooler is provided in a part on the other side from both partition members, and the refrigerant flowing out from the header on the first tank side of the condensing part is liquid-received. The refrigerant flowing into the refrigerant inflow side tubular liquid receiving part through the first flow path of the receiver mounting member and flowing out from the refrigerant outflow side tubular liquid receiving part passes through the second flow path of the liquid receiver mounting member. On top of the first tank side of the header 1) A heat exchanger according.

  3) Each tubular liquid receiving part is composed of a liquid receiving pipe independent from each other, and a plurality of communication members are arranged at intervals in the length direction of the liquid receiving pipe between adjacent liquid receiving pipes. The above 1) or 2) description, wherein the liquid receiving pipes that are joined to the liquid pipe are connected to each other through a through hole formed in the peripheral wall of the liquid receiving pipe and a communication hole formed in each communication member. Heat exchanger.

  4) Each tubular liquid receiving part is composed of independent liquid receiving pipes, and one communicating member extending in the length direction of the liquid receiving pipes is arranged between the adjacent liquid receiving pipes so that both liquid receiving pipes are provided. Adjacent liquid receiving pipes joined together have a plurality of through holes formed in the peripheral wall of the liquid receiving pipe at intervals in the length direction, and a plurality of holes formed in the communication member at intervals in the length direction. The heat exchanger according to 1) or 2), wherein the heat exchanger is communicated through a communication hole.

  5) Each tubular liquid receiving part is composed of a liquid receiving pipe independent from each other, a through hole is formed in the peripheral wall of one of the adjacent liquid receiving pipes, and the peripheral wall of the other liquid receiving pipe And a communicating portion having a communicating hole projecting toward the one liquid receiving tube and having a leading end inserted into the through-hole and allowing the other liquid receiving tube to pass through the inside and the outside. Is a heat exchanger according to 1) or 2), wherein the heat exchanger is communicated through a communication hole formed in the communication portion.

  6) The heat exchanger according to any one of 1) to 5) above, wherein the number of tubular liquid receivers is two.

  According to the heat exchangers 1) to 5), after the gas-liquid mixed phase refrigerant flows into the refrigerant inflow side tubular liquid receiving part from the first tank, the refrigerant outflow side tubular receiver is passed through all the tubular liquid receiving parts. It flows out from the liquid part to the tank. Then, in each tubular liquid receiving part, the gas phase refrigerant and the liquid phase refrigerant are separated by the action of gravity, and only the liquid phase refrigerant flows out from the refrigerant outflow side tubular liquid receiving part to the tank. Therefore, the gas-liquid separation effect is excellent. In addition, the length, diameter, and the like of each tubular liquid receiving part can be made smaller than the vertical cylindrical liquid receiving pipe of the heat exchanger described in Patent Document 1, and the arrangement of the tubular liquid receiving parts. When the heat exchanger is arranged in the engine room, it is possible to prevent useless space from being generated. Therefore, the distance from the bumper to the heat exchanger can be increased so as to satisfy the automobile collision standard.

  According to the heat exchanger of 4), the number of components is reduced and the structure of each component is simplified.

  According to the heat exchanger of 6), the number of parts is reduced.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same part and the same thing through all drawings, and the overlapping description is abbreviate | omitted.

  In the embodiment described below, the heat exchanger according to the present invention is applied to a heat exchanger in which a condensing part having a condenser function and a supercooling part having a supercooler function are integrated. In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum.

Embodiment 1
This embodiment is shown in FIG. 1 and FIG.

  FIG. 1 shows the overall configuration of the heat exchanger of this embodiment, and FIG. 2 shows the configuration of the main part thereof.

  In FIG. 1, the heat exchanger (1) has a width between a pair of left and right aluminum tanks (2) and (3) extending in the vertical direction and spaced apart from each other, and both tanks (2) and (3). A plurality of flat aluminum heat exchange tubes that extend in the left-right direction with their directions directed in the front-rear direction and arranged in parallel at intervals in the up-down direction and having both ends connected to both tanks (2) and (3), respectively. (4), an aluminum corrugated fin (5) disposed between the adjacent heat exchange tubes (4) and outside the heat exchange tubes (4) at both upper and lower ends and brazed to the heat exchange tubes (4), A pair of upper and lower aluminum side plates (6) placed outside the corrugated fins (5) at the upper and lower ends and brazed to the corrugated fins (5), and a block fixed to the left tank (2) by brazing Aluminum receiving tube mounting member (7) (tubular liquid receiving portion mounting member) and liquid receiving tube mounting member (7) Multiple extending been vertically here and a two aluminum liquid receiving tubes (8) (9) (tubular liquid receiving part). Here, the left tank (2) is the first tank, and the right tank (3) is the second tank.

  Both tanks (2) and (3) of the heat exchanger (1) are divided vertically by aluminum partition members (11) and (12) at the same height in the lower part. A condenser (13) having a condenser function to be condensed into a liquid phase, and a supercooler for supercooling the liquid refrigerant condensed in the condenser (13) to a temperature about 5 to 15 ° C. lower than the condensation temperature A supercooling section (14) having a function is integrally provided side by side in the same vertical plane.

  Here, the part above the partition member (11) in the left tank (2) condenses the left header (15) of the condensing part (13) and the part above the partition member (12) in the right tank (3) This is the right header (16) of the section (13). In addition, the part below the partition member (11) in the left tank (2) is the left header (17) of the supercooling section (14) and the part below the partition member (12) in the right tank (3) is excessive. It is a right header (18) of a cooling unit (14).

  The right header (16) of the condensing part (13) is divided into an upper header part (16a) and a lower header part by a first partition plate (19) for aluminum passage group formation provided at a middle height position in the vertical direction. The left header (15) is divided into a second partition plate for aluminum passage group formation (at a height position lower than the first partition plate for passage group formation (19)). 21), the upper header portion (15a) and the lower header portion (15b) are partitioned. The condensing part (13) is divided into a part above the first partition plate (19), a part between the partition plates (19) and (21), and a part below the second partition plate (21), respectively. A group of passages (22), (23) and (24) comprising heat exchange tubes (4) arranged continuously in the vertical direction are provided. The number of heat exchange pipes (4) constituting each of the passage groups (22), (23) and (24) decreases sequentially from the top. In addition, the flow direction of the refrigerant in all the heat exchange pipes (4) constituting each of the passage groups (22), (23), and (24) is the same, and two adjacent passage groups (22) (23) And the flow directions of the refrigerant in the heat exchange pipes (4) of (23) and (24) are different.

  An aluminum refrigerant inlet member (25) leading to a refrigerant inlet (not shown) is brazed to the upper header portion (16a) of the right header (16) of the condensing portion (13). An aluminum refrigerant outlet member (26) that leads to a refrigerant outlet (not shown) is brazed to the right header (18) of the supercooling section (14).

  One end of the liquid receiving pipe mounting member (7) communicates with the lower header section (15b) of the left header (15) of the condensing section (13) and the other end communicates with one liquid receiving pipe (8). One flow path (27), and a second flow path (28) having one end communicating with the left header (17) of the supercooling section (14) and the other end communicating with the other liquid receiving pipe (9). Is formed. The liquid receiving pipe (8) communicating with the first flow path (27) of the liquid receiving pipe mounting member (7) is the lower header part (15b) of the left header (15) of the left tank (2) in the condensing part (13). The refrigerant inflow side receiving pipe into which the gas-liquid mixed phase refrigerant flows from, and the receiving pipe (9) leading to the second flow path (28) is connected to the left of the left tank (2) in the supercooling section (14). It is a refrigerant outflow side receiving pipe that allows liquid phase refrigerant to flow out to the header (17).

  Each liquid receiving pipe (8) (9) is a cylindrical body with the upper end closed and the lower end opened, and the lower end opening is received side by side in the left and right direction so as to communicate with both flow paths (27) (28). It is fixed to the liquid pipe attachment member (7). The liquid receiving pipes (8) and (9) preferably have a width in the front-rear direction equal to or smaller than the width in the front-rear direction of both tanks (2) and (3). In addition, the liquid receiving pipes (8) and (9) are not limited to circular pipes, and their cross-sectional shapes can be changed, and square pipes or the like can be used. A plurality of aluminum communicating members (31) are disposed between the liquid receiving pipes (8) and (9) fixed to the liquid receiving pipe mounting member (7) in the longitudinal direction of the liquid receiving pipes (8) and (9). And are brazed to both liquid receiving pipes (8) and (9). As shown in FIG. 2, the left and right surfaces of each communication member (31) are formed in a partially concave cylindrical surface so that a part of the outer peripheral surface of the liquid receiving pipes (8) and (9) is in close contact. And the through holes (32) (33) formed at positions corresponding to the respective communication members (31) on the peripheral walls of the upper and lower liquid receiving pipes (8) (9), and the respective communication members (31). The liquid receiving pipes (8) and (9) adjacent to each other on the left and right are communicated with each other through the communication hole (34). Although illustration is omitted, a desiccant, a strainer for removing foreign matter, a filter, and the like are disposed inside at least one of the liquid receiving pipes (8) and (9).

  The heat exchanger (1) described above constitutes a refrigeration cycle together with a compressor, a decompressor (expansion valve) and an evaporator. Such a refrigeration cycle is used as an air conditioner for vehicles such as automobiles.

  In the heat exchanger (1) described above, during the operation of the refrigeration cycle, the gas-liquid mixed phase refrigerant passes through the refrigerant inlet (not shown) from the refrigerant inlet member (25) and above the right header (16) of the condenser (13). It flows into the header part (16a). The gas-liquid mixed phase refrigerant that has flowed into the upper header portion (16a) of the right header (16) passes through the heat exchange pipe (4) of the upper end passage group (22), and the upper header portion (15a ), Then flows into the lower header section (16b) of the right header (16) through the heat exchange pipe (4) of the intermediate passage group (23), and further heat exchange of the lower end passage group (24). It flows into the lower header portion (15b) of the left header (15) through the pipe (4).

  The gas-liquid mixed phase refrigerant that has flowed into the lower header portion (15b) of the left header (15) of the condensing portion (13) passes through the first flow path (27) of the receiving pipe mounting member (7) and opens at the lower end. Then, the refrigerant flows into the refrigerant inflow side receiving pipe (8) and is separated into gas and liquid in the liquid receiving pipe (8) by the action of gravity. In addition, the gas-liquid mixed phase refrigerant that has flowed into the refrigerant inflow side receiving pipe (8) passes through the through hole (32) in the peripheral wall of the refrigerant inflow side liquid receiving pipe (8) and the communication hole (34) of the communication member (31). ) And through the through hole (33) in the peripheral wall of the refrigerant outflow side liquid receiving pipe (9) and enters the refrigerant outflow side liquid receiving pipe (9), and gas-liquid separation is also performed in the liquid receiving pipe (9). . Then, the gas-phase refrigerant accumulates in the upper portions of the two liquid-receiving pipes (8) and (9), and the liquid-phase refrigerant flows out from the lower end opening of the refrigerant outflow-side liquid receiving pipe (9). It flows into the left header (17) of the supercooling section (14) through the second flow path (28) of 7). Therefore, the gas-liquid separation effect in both liquid receiving pipes (8) and (9) becomes excellent, the amount of gas-phase refrigerant flowing into the supercooling section (14) decreases, and the supercooling section (14) The subcooling effect in the case becomes sufficient, and the cooling effect of the entire refrigeration cycle is improved. The refrigerant flowing into the left header (17) of the supercooling section (14) flows into the right header (18) through the heat exchange pipe (4), and passes through the refrigerant outlet member (26) from the refrigerant outlet (not shown). Through to the decompressor.

Embodiment 2
This embodiment is shown in FIG. 3 and FIG.

  In the case of the heat exchanger (40) of this embodiment, the left side portion of the peripheral wall of the refrigerant inflow side liquid receiving pipe (8) located on the right side of the both liquid receiving pipes (8) and (9), and the refrigerant located on the left side The right side portion of the peripheral wall of the outflow side liquid receiving pipe (9), except for the upper and lower ends, is recessed so as to be flat on the inside. Recessed flat portions in the peripheral walls of both liquid receiving pipes (8) and (9) are indicated by (41) and (42). Between the flat parts (41) and (42) of the peripheral walls of both liquid receiving pipes (8) and (9), one strip-shaped communicating member (43) that is long in the vertical direction is placed with the width direction facing the front-rear direction. And brazed to both liquid receiving pipes (8) and (9). A plurality of through holes (44), (45) are formed in the flat portions (41), (42) of the peripheral walls of the liquid receiving pipes (8), (9) at intervals in the left-right direction. A communication hole (46) is formed at a position corresponding to the through hole (44) (45) in the member (43), and both the receiving pipes are formed by these through holes (44) (45) and the communication hole (46). (8) (9) There is mutual communication.

  Other configurations are the same as those of the heat exchanger (1) of the first embodiment, and gas-liquid separation is efficiently performed in the same manner as the heat exchanger (1) of the first embodiment.

Embodiment 3
This embodiment is shown in FIG. 5 and FIG.

  In the case of the heat exchanger (50) of this embodiment, the left part of the peripheral wall of the right liquid receiving pipe (8) among the two liquid receiving pipes (8) and (9) adjacent to the gas-liquid separator (4) A plurality of through holes (51) are formed at intervals in the vertical direction. Further, a communicating part (52) protruding upward at a position corresponding to the through hole (51) in the left liquid receiving pipe (9) and having a tip portion inserted into the through hole (51) of the right liquid receiving pipe (8) Are formed integrally, and a communicating hole (53) through which the inside and outside of the left liquid receiving pipe (9) is passed is formed at the protruding end of the communicating part (52). Adjacent liquid receiving pipes (8) and (9) communicate with each other through the communication hole (53) of the communication section (52). The communicating portion (52) may be tapered toward the tip.

  Other configurations are the same as those of the heat exchanger (1) of the first embodiment, and gas-liquid separation is efficiently performed in the same manner as the heat exchanger (1) of the first embodiment.

  In the third embodiment, a through hole (51) is formed in the right liquid receiving pipe (8), and a communication part (52) having a communication hole (53) is formed in the left liquid receiving pipe (9). However, conversely, a through hole (51) is formed in the left liquid receiving pipe (9), and a communication portion (52) having a communication hole (53) is formed in the right liquid receiving pipe (8). Also good. In addition, the liquid receiving pipes (8) and (9) may include a communicating portion (52) having a through hole (51) and a communicating hole (53), respectively. Further, the communication part (52) does not have to be formed integrally with the liquid receiving pipes (8) and (9), but may be formed separately.

  In the above three embodiments, the two liquid receiving pipes (8) and (9) are arranged side by side in the left-right direction, but the present invention is not limited to this, and these liquid receiving pipes (8) and (9) are arranged. ) Can be changed as appropriate, and when this heat exchanger is arranged in the engine room, it may be arranged so as not to create a useless space. In the above two embodiments, two liquid receiving pipes (8) and (9) are used. However, the present invention is not limited to this, and three or more liquid receiving pipes communicated with each other. May be used. In this case, any one liquid receiving pipe serves as a refrigerant inflow side liquid receiving pipe that leads to the first flow path of the liquid receiving pipe mounting member, and any one other liquid receiving pipe serves as the first pipe of the liquid receiving pipe mounting member. The refrigerant receiving-side liquid receiving pipe that leads to the two flow paths is formed, and the remaining liquid receiving pipes are not allowed to communicate with the flow path of the liquid receiving pipe mounting member.

  Furthermore, in the above-described three embodiments, each tubular liquid receiving part is composed of a liquid receiving pipe independent of each other. However, the present invention is not limited to this. For example, all the tubular liquid receiving parts include two liquid receiving parts. Formed by joining the forming members to each other, and each liquid receiving part forming member is formed with a plurality of liquid receiving part outward bulging parts extending in the vertical direction, and both liquid receiving parts A tubular liquid receiving portion is formed by the liquid receiving portion outward bulging portion of the forming member, and the adjacent liquid receiving portion outward bulging in at least one of the liquid receiving portion forming members among the liquid receiving portion forming members is formed. A plurality of communication outwardly bulging portions formed at intervals between the portions allow the tubular liquid receiving portions adjacent to the left and right to communicate with each other, and any one of the tubular liquid receiving portions is attached to the liquid receiving tube. It becomes a refrigerant inflow side liquid receiving part which leads to the 1st channel of a member, and any one other tubular liquid receiving part It may become a refrigerant outlet side liquid receiving part communicating with the second flow path of the liquid receiving tube mounting member.

It is a front view which shows the whole structure of the heat exchanger of Embodiment 1 of this invention. It is an expansion disassembled perspective view which shows a part of heat exchanger shown in FIG. It is a front view which shows the whole structure of the heat exchanger of Embodiment 2 of this invention. FIG. 4 is an enlarged exploded perspective view showing a part of the heat exchanger shown in FIG. 3. It is a front view which shows the whole structure of the heat exchanger of Embodiment 3 of this invention. FIG. 6 is an enlarged exploded perspective view showing a part of the heat exchanger shown in FIG. 5.

Explanation of symbols

(1) (40) (50): Heat exchanger
(2) (3): Tank
(4): Heat exchange pipe
(5): Corrugated fin
(7): Receiving tube mounting member (receiving portion mounting member)
(8): Refrigerant inflow side liquid receiving pipe (refrigerant inflow side tubular liquid receiving part)
(9): Refrigerant outflow side liquid receiving pipe (refrigerant outflow side tubular liquid receiving part)
(11) (12): Partition member
(13): Condensing section
(14): Supercooling section
(27): First flow path
(28): Second flow path
(31): Communication member
(32) (33): Through hole
(34): Communication hole
(43): Communication member
(44) (45): Through hole
(46): Communication hole
(51): Through hole
(52): Communication part
(53): Communication hole

Claims (6)

A pair of vertically extending tanks that are spaced apart from each other, and a plurality of heat exchange tubes that are disposed in parallel with a distance between the two tanks in the vertical direction and are connected to both tanks at both ends. And a heat exchanger comprising fins disposed between adjacent heat exchange tubes,
A liquid receiving part mounting member is fixed to any one of the first tanks, and a plurality of tubular liquid receiving parts extending in the vertical direction are fixed to the liquid receiving part mounting member, and a refrigerant flows into which refrigerant flows from the first tank. A side tubular liquid receiving part and a refrigerant outflow side tubular liquid receiving part from which the refrigerant flows out to the first tank are included, and the liquid receiving part mounting member allows the liquid inflow side tubular liquid receiving part and the first tank to pass through the first tubular liquid receiving part. 1 and a second flow path through the refrigerant outflow side tubular liquid receiving part and the first tank are formed, and the adjacent tubular liquid receiving parts are communicated with each other. The refrigerant that has flowed into the refrigerant inflow side tubular liquid receiving part through the flow path returns to the first tank from the refrigerant outflow side tubular liquid receiving part through the second flow path through all the tubular liquid receiving parts. Heat exchanger. The first tank to which the liquid receiving portion mounting member is fixed is partitioned into two headers in the length direction of the first tank by the first partition member, and the other second tank is also the second partition member by the second partition member. Condensing part which is divided into two headers in the length direction of two tanks, both partition members are in the same position in the length direction of both tanks, and has a function as a condenser on one side of both partition members And a supercooling part having a function as a supercooler is provided on the other side of both partition members, and the refrigerant flowing out from the header on the first tank side of the condensing part is attached to the receiver. The refrigerant flowing into the refrigerant inflow side tubular liquid receiving part through the first flow path of the member and flowing out from the refrigerant outflow side tubular liquid receiving part passes through the second flow path of the liquid receiver mounting member, and the second of the supercooling part. Claims that flow out to the header on the tank side 1 heat exchanger according. Each tubular liquid receiving part is composed of a liquid receiving pipe independent from each other, and a plurality of communication members are arranged between adjacent liquid receiving pipes at intervals in the length direction of the liquid receiving pipe. The heat exchange according to claim 1 or 2, wherein adjacent liquid receiving pipes are connected to each other through a through hole formed in a peripheral wall of the liquid receiving pipe and a communication hole formed in each communication member. vessel. Each tubular liquid receiving part is composed of a liquid receiving pipe independent from each other, and one communicating member extending in the length direction of the liquid receiving pipe is disposed between adjacent liquid receiving pipes and joined to both liquid receiving pipes. A plurality of through holes in which adjacent liquid receiving pipes are formed in the peripheral wall of the liquid receiving pipe at intervals in the length direction, and a plurality of communication holes formed in the communication member at intervals in the length direction. The heat exchanger according to claim 1 or 2, wherein the heat exchanger is communicated with each other. Each tubular liquid receiving part consists of a liquid receiving pipe independent from each other, a through hole is formed in the peripheral wall of one of the adjacent liquid receiving pipes, and the peripheral wall of the other liquid receiving pipe, The one receiving tube is protruded and a tip portion is inserted into the through hole, and a communicating portion having a communicating hole through which the other receiving tube is passed is provided, and adjacent receiving tubes are The heat exchanger according to claim 1 or 2, wherein the heat exchanger is communicated through a communication hole formed in the communication portion. The heat exchanger according to any one of claims 1 to 5, wherein the number of tubular liquid receivers is two.

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