heat exchanger

Abstract

To provide a heat exchanger which can simplify a structure for circulating a refrigerant.SOLUTION: A heat exchanger 10 comprises core parts 20, 22, each including header tanks 24, and a plurality of tubes 26 connecting the header tanks 24 to each other and exchanging heat between a refrigerant circulating therein and air flowing around the tubes. A plurality of core parts 20, 22 are provided on top on each other in an airflow direction 12. The heat exchanger 10 comprises a passage forming member 28 arranged between one header tank 24 and the other header tank 24 which are arranged on top of each other. The one header tank 24 and the other header tank 24 have tank-side holes 62 in portions which are opposite each other. The passage forming member 28 has a communication hole 90 for providing communication between the opposing tank-side holes 62. One hole 62 of the tank-side hole 62 and the communication hole 90 is a long hole which is longer than the other hole 90 in a tank length direction, and one hole 62 is in communication with the plurality of other holes 90.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a heat exchanger. [Background technology]

[0002] Patent Document 1 discloses a heat exchanger in which core sections each having a tank section are stacked one on top of the other. The tank section of one core section is connected to a distribution section communication section, which is connected to an intermediate tank section. The intermediate tank section is connected to a collection section communication section, which is connected to the tank section of the other core section. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-185723 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in this heat exchanger, the tank part of one core part is connected to the tank part of the other core part via a distributor part communication part, an intermediate tank part, and a collector part communication part, which makes the structure complicated.

[0005] The present invention has been made in view of the above points, and an object of the present invention is to provide a heat exchanger that can simplify the structure for passing a refrigerant. [Means for solving the problem]

[0006] According to one aspect of the present invention, a heat exchanger for exchanging heat between air and a refrigerant that undergoes a phase change between a liquid phase and a gas phase includes a pair of header tanks that are provided opposite to each other, and a plurality of tubes that connect the header tanks and exchange heat between the refrigerant flowing therethrough and the air flowing around the refrigerant, each of the header tanks including a core portion that is provided in a stacked manner in a direction of air flow, and a passage forming member provided between one of the stacked header tanks and the other of the stacked header tanks, wherein the one header tank and the other header tank have tank-side holes in portions that face each other, and the passage forming member has a communication hole that connects the tank-side holes that face each other, and Tank side hole teeth, The communication hole The length of the slot is longer in the tank length direction than the slot. Tank side hole is a plurality of Communication hole Communicate with death , The thickness of a portion of the passage forming member in which the communication holes that connect the tank-side holes are formed is larger than the thickness of a portion of the header tank in which the tank-side holes are formed. . [Effects of the Invention]

[0007] In the heat exchanger of the above aspect, the tank-side holes of one of the stacked header tanks are connected to the tank-side holes of the other header tank by a communication hole in a passage-forming member provided between the two header tanks. Therefore, the communication passage connecting one header tank to the other can be formed by the communication hole in the passage-forming member provided between the one header tank and the other header tank. This eliminates the need for a distribution section communication part, an intermediate tank part, and a collection section communication part for connecting one header tank to the other header tank. This makes it possible to provide a heat exchanger with a simplified structure for refrigerant flow. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a heat exchanger according to an embodiment of the present invention. [Figure 2] FIG. 2 is an enlarged view of a main part of the header tank. [Figure 3]FIG. 3 is an enlarged view of the main part showing a state in which a tube is inserted into the header tank. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Figure 5] FIG. 5 is a perspective view of the passage forming member. [Figure 6] FIG. 6 is an explanatory diagram showing the relationship between the header tank and the passage forming member. [Figure 7] FIG. 7 is a diagram showing the relationship between the tank-side hole and the communication hole. DETAILED DESCRIPTION OF THE INVENTION

[0009] A heat exchanger 10 according to an embodiment of the present invention will be described below with reference to the drawings.

[0010] First, the overall configuration of a heat exchanger 10 will be described with reference to Fig. 1. Fig. 1 is a perspective view of a heat exchanger 10 according to an embodiment of the present invention.

[0011] The heat exchanger 10 is mounted on a vehicle (not shown). The heat exchanger 10 exchanges heat between a refrigerant that is circulated in an air conditioner (not shown) and undergoes a phase change between a liquid phase and a gas phase, and air used for air conditioning.

[0012] Specifically, the heat exchanger 10 is provided in an HVAC (Heating, Ventilation, and Air Conditioning) unit (not shown) through which air used for air conditioning passes. The heat exchanger 10 is a condenser that exchanges heat with the air used for air conditioning and condenses the refrigerant to heat the air when the air conditioner performs heating operation. However, the heat exchanger 10 may also be an evaporator that exchanges heat with the air used for air conditioning and evaporates the refrigerant to cool and dehumidify the air when the air conditioner performs cooling operation.

[0013] The heat exchanger 10 has an upstream core section 20 arranged upstream in the air flow direction 12, a downstream core section 22 arranged downstream in the air flow direction, and reinforcing members 23 provided at both ends of the heat exchanger 10. The upstream core section 20 and the downstream core section 22 are arranged overlapping each other in the air flow direction 12.

[0014] The upstream core section 20 and the downstream core section 22 each include a pair of header tanks 24 extending laterally, a plurality of tubes 26 provided between the pair of header tanks 24, and fins (not shown) provided therebetween. The header tanks 24, the tubes 26, and the fins provided between the tubes 26 are made of a metal such as aluminum, and are joined together by brazing or the like to form an integrated unit.

[0015] The heat exchanger 10 also includes a passage forming member 28 provided between the header tank 24 of the upstream core section 20 and the header tank 24 of the downstream core section 22 that are arranged one above the other.

[0016] The upstream core section 20 is divided at the center in the arrangement direction of the tubes 26 into a first divided core section 30 and a second divided core section 32, each of which has an independent refrigerant flow path. The downstream core section 22 is divided at the center in the arrangement direction of the tubes 26 into a third divided core section 34 and a fourth divided core section 36, each of which has an independent refrigerant flow path.

[0017] (tube) The tubes 26 provided in each core portion 20, 22 connect the header tanks 24 of the core portions 20, 22 to each other and perform heat exchange between the refrigerant flowing inside and the air flowing around.

[0018] The cores 20, 22 are arranged to intersect with the air flow direction so that air passes between the tubes 26. The cores 20, 22 are arranged one on top of the other in the air flow direction so that air passes continuously through them. In the heat exchanger 10 of this embodiment, two cores 20, 22 are arranged side by side in two layers, one in front and one in back, but the number of cores is not limited to two and may be any number.

[0019] The tubes 26 are arranged in parallel and stacked at intervals. The tubes 26 are formed in a flat shape and stacked in the thickness direction. Fins are provided in the spaces between adjacent tubes 26. The tubes 26 are stacked in a direction intersecting the air flow direction 12. A flow path through which a refrigerant flows is formed within the tubes 26.

[0020] (fin) The fins are provided between adjacent tubes 26 and are stacked alternately with the tubes 26. The fins are formed in a wave shape along the longitudinal direction of the tubes 26 and are joined to two adjacent tubes 26. Air supplied by a blower (not shown) of an air conditioner passes around the multiple tubes 26 and the fins. Therefore, the refrigerant flowing inside the tubes 26 can exchange heat with the air via the surfaces of the tubes 26 and the fins. In this way, the fins promote heat exchange between the refrigerant and the air.

[0021] (reinforcing member) The reinforcing members 23 are provided at both end portions of the upstream core portion 20 and the downstream core portion 22. The reinforcing members 23 abut against fins provided at both end portions of the upstream core portion 20 and the downstream core portion 22. The longitudinal ends of the reinforcing members 23 are respectively engaged with the header tanks 24, and the reinforcing members 23 connect and reinforce the pair of header tanks 24. When the tubes 26 and the fins are brazed to form the upstream core portion 20 and the downstream core portion 22, the reinforcing members 23 are brazed to the fins and become integrated with the upstream core portion 20 and the downstream core portion 22.

[0022] (Header tank) The header tank 24 of the upstream core member 20 is internally divided at the center in the arrangement direction of the tubes 26, and includes a first upper header tank 40 that constitutes the first divided core member 30 and a second upper header tank 42 that constitutes the second divided core member 32. The header tank 24 of the upstream core member 20 also includes a first lower header tank (not shown) that constitutes the first divided core member 30 and a second lower header tank 46 that constitutes the second divided core member 32. The first lower header tank and the second lower header tank 46 are internally connected. Note that, in this embodiment, the first lower header tank and the second lower header tank 46 are described as separate bodies, but this embodiment is not limited to this. For example, the first lower header tank and the second lower header tank 46 may be integrated.

[0023] The header tank 24 of the downstream core member 22 is internally divided at the center in the arrangement direction of the tubes 26, and has a third upper header tank 50 that constitutes the third divided core member 34 and a fourth upper header tank 52 that constitutes the fourth divided core member 36. The header tank 24 of the downstream core member 22 also has a third lower header tank 54 that constitutes the third divided core member 34 and a fourth lower header tank 56 that constitutes the fourth divided core member 36. The third lower header tank 54 and the fourth lower header tank 56 are divided from each other.

[0024] Fig. 2 is an enlarged view of a main part of the header tank 24. Fig. 3 is an enlarged view of a main part showing a state in which the tube 26 is inserted into the header tank 24. Fig. 4 is a cross-sectional view taken along line IV-IV in Fig. 1.

[0025] As shown in Fig. 4, each header tank 24 is tubular and long in the direction in which the tubes 26 are arranged (see Fig. 1). Each upper header tank 40, 50, (42, 52) has a substantially rectangular cross section. When the heat exchanger 10 is attached, the upper surface 60 of each upper header tank 40, 50, (42, 52) is curved so that the central portion in the width direction protrudes upward.

[0026] As shown in Fig. 2, the first upper header tank 40 and the third upper header tank 50 have tank-side holes 62 in portions facing each other (only the first upper header tank 40 is shown). Similarly, the second upper header tank 42 and the fourth upper header tank 52 also have tank-side holes 62 in portions facing each other. Note that Fig. 2 representatively shows a main portion of the first upper header tank 40 of the first divided core member 30.

[0027] Each upper header tank 40, (42, 50, 52) has, for example, five tank side holes 62. Each tank side hole 62 is an elongated hole that is long in the longitudinal direction of the corresponding upper header tank 40, (42, 50, 52). The tank side holes 62 are arranged at predetermined intervals in the longitudinal direction of the header tank 24, and connecting portions 64 exist between adjacent tank side holes 62.

[0028] This suppresses a decrease in the rigidity of each upper header tank 40, (42, 50, 52) compared to when a single tank side hole 62 that is long in the length direction of the header tank 24 is formed in each upper header tank 40, (42, 50, 52).

[0029] 3 and 4, each header tank 24 has a plurality of tube insertion ports 66 into which the tubes 26 are respectively inserted. When a virtual area 68 is imagined as extending circumferentially of each header tank 24, passing through the connecting portion 64 between adjacent tank-side holes 62, some of the tube insertion ports 66 open into the virtual area 68 (see FIG. 3).

[0030] As shown in Fig. 3, each tube insertion opening 66 is formed by burring. An upright wall 70 is formed on the edge of each tube insertion opening 66 to support the inserted tube 26 from the circumferential surface and reinforce the tube insertion opening 66 (see Fig. 4).

[0031] 1, a pair of header tanks 24 are provided facing each other in each core portion 20, 22. The header tanks 24 are arranged so that both longitudinal ends of the plurality of tubes 26 are inserted into the header tanks 24. Each header tank 24 temporarily stores the refrigerant.

[0032] The ends of the upper header tanks 40, 42, 50, 52, the end of the first lower header tank, and the end of the third lower header tank 54 are closed with closing members 72. The ends of the second lower header tank 46 and the fourth lower header tank 56 are provided with relay members 74 for relaying the piping.

[0033] Refrigerant used for air conditioning flows into one of the header tanks 24 in each of the core units 20, 22. The refrigerant that flows into one of the header tanks 24 flows through each of the multiple tubes 26. As the refrigerant flows through the tubes 26, it exchanges heat with the air. The refrigerant that has flowed through the tubes 26 flows into the other of the header tanks 24 in each of the core units 20, 22.

[0034] (passageway forming member) 1, the passage forming member 28 is provided between the first upper header tank 40 of the first divided core member 30 and the third upper header tank 50 of the third divided core member 34, which are arranged on top of each other. The passage forming member 28 is also provided between the second upper header tank 42 of the second divided core member 32 and the fourth upper header tank 52 of the fourth divided core member 36, which are arranged on top of each other.

[0035] Fig. 5 is a perspective view of the passage forming member 28. Fig. 6 is an explanatory diagram showing the relationship between the header tank 24 and the passage forming member 28.

[0036] 5, the passageway forming member 28 is an elongated member. The passageway forming member 28 is formed with a Y-shaped cross section by a plate-shaped insertion piece 80 inserted between the core portions 20, 22 arranged in a stacked manner and a bifurcated portion 82 formed at the end of the insertion piece 80.

[0037] As shown in FIG. 4, the thickness T1 of the insertion piece 80 is greater than the thickness T2 of each header tank 24.

[0038] The outer surfaces of the one piece 84 and the other piece 86 that make up the bifurcated portion 82 are curved surfaces that follow the curved surfaces of the top surfaces 60 of the respective upper header tanks 40, 50, (42, 52). As a result, when the insertion piece 80 of the passage forming member 28 is disposed between the adjacent upper header tanks 40, 50, (42, 52), the one piece 84 of the bifurcated portion 82 comes into surface contact with the top surface 60 of one of the upper header tanks 50, (40, 42, 52). In addition, the other piece 86 of the bifurcated portion 82 comes into surface contact with the top surface 60 of the other upper header tank 40, (42, 50, 52).

[0039] The insertion amount of the passage forming member 28 between adjacent upper header tanks 40, 50, (42, 52) is determined with one piece 84 and the other piece 86 of the bifurcated portion 82 in surface contact with the upper surface 60 of each upper header tank 40, 50, (42, 52). In this inserted state, the passage forming member 28 is brazed to each upper header tank 40, 50, (42, 52).

[0040] 6, the insertion piece 80 of the passage forming member 28 has ten communication holes 90 that communicate with the opposing tank-side holes 62. The communication holes 90 are elliptical holes that are shorter in length than the tank-side holes 62, and two communication holes 90 communicate with one tank-side hole 62.

[0041] In this embodiment, the tank-side hole 62 is an elongated hole longer than the communication hole 90, but this embodiment is not limited to this. For example, the communication hole 90 may be an elongated hole longer than the tank-side hole 62.

[0042] 4, the thickness dimension T1 of the insertion piece 80 of the passage forming member 28 is larger than the thickness dimension T2 of each header tank 24. Therefore, when the pressure inside each header tank 24 is increased, the pressure-receiving area per unit length formed by the inner circumferential surface of the communication hole 90 of the insertion piece 80 is larger than the pressure-receiving area per unit length formed by the inner circumferential surface of the tank-side hole 62 of each header tank 24.

[0043] For this reason, when the communicating hole 90 is made into an elongated hole, the total pressure-receiving area formed by the inner peripheral surface of the communicating hole 90 increases. As a result, the pressure received by the inner peripheral surface of the communicating hole 90 increases, which may cause the communicating hole 90 to deform.

[0044] Therefore, in this embodiment, the tank side hole 62 is made an elongated hole that is longer than the communicating hole 90, thereby suppressing an increase in the total pressure-receiving area formed by the inner surface of the communicating hole 90 and preventing deformation of the communicating hole 90.

[0045] FIG. 7 is a diagram showing the relationship between the tank side hole 62 and the communication hole 90, and shows the state in which the passage forming member 28 is set between the upper header tanks 50, (40, 42, 52) that are arranged one on top of the other.

[0046] 7, the length dimension L1 of the tank-side hole 62 of each upper header tank 50 (40, 42, 52) is longer than the length dimension L2 from one end 92 to the other end 94 of an adjacent pair of communicating holes 90. Specifically, the length dimension L1 of the tank-side hole 62 is longer than the length dimension L2 from one end 92 to the other end 94 of an adjacent pair of communicating holes 90 by, for example, 0.5 mm.

[0047] This prevents the set of communication holes 90 from protruding from the tank-side holes 62, even when the passage forming members 28 are arranged offset in the longitudinal direction of each upper header tank 50, (40, 42, 52). Therefore, the communication passage formed by the communication portion between the communication holes 90 and the tank-side holes 62 is prevented from narrowing.

[0048] (Relay component) 1, the relay member 74 has a second lower tank connecting pipe 100 that communicates with the second lower header tank 46, and a fourth lower tank connecting pipe 102 that communicates with the fourth lower header tank 56. The relay member 74 also has a third lower tank connecting pipe 104 that communicates with the third lower header tank 54. Each of the connecting pipes 100, 102, 104 is connected to a piping (not shown) through which a refrigerant flows.

[0049] The refrigerant flows from the supply piping into the third lower header tank 54 via the third lower tank connecting pipe 104, flows through the tubes 26 into the third divided core portion 34, and then flows into the first divided core portion 30 via the passage forming member 28. The medium that has flowed into the first divided core portion 30 passes through the first lower header tank, the second lower header tank 46, and the second lower tank connecting pipe 100 and is recovered by the recovery piping.

[0050] The refrigerant flows from the supply piping into the fourth lower header tank 56 via the fourth lower tank connecting pipe 102, flows through the tubes 26, and enters the fourth divided core portion 36, and then flows into the second divided core portion 32 via the passage forming member 28. The medium that has flowed into the second divided core portion 32 passes through the second lower header tank 46 and the second lower tank connecting pipe 100 and is recovered by the recovery piping.

[0051] According to the above embodiment, the following effects are achieved.

[0052] The heat exchanger 10 exchanges heat between air and a refrigerant that undergoes a phase change between liquid and gas. The heat exchanger 10 includes a pair of opposing header tanks 24 and core sections 20, 22, each having a plurality of tubes 26 that connect the header tanks 24 and exchange heat between the refrigerant flowing therethrough and the air flowing around them. The core sections 20, 22 are arranged in a stacked manner in the air flow direction 12. The heat exchanger 10 includes a passage-forming member 28 provided between one of the stacked header tanks 24 and the other of the stacked header tanks 24.

[0053] The first header tank 24 and the second header tank 24 have tank-side holes 62 in opposing portions. The passage forming member 28 has communication holes 90 that connect the opposing tank-side holes 62. One of the tank-side holes 62 and the communication holes 90 is an elongated hole that is longer than the other hole 90, and the one hole 62 connects with multiple other holes 90.

[0054] In the heat exchanger 10 having this configuration, the tank-side holes 62 of one of the overlapping header tanks 24 and the tank-side holes 62 of the other of the overlapping header tanks 24 are communicated by the communication holes 90 of the passage forming member 28 provided between the two header tanks 24. Therefore, a communication passage that communicates between one header tank 24 and the other header tank 24 can be formed by the communication holes 90 of the passage forming member 28 provided between the one header tank 24 and the other header tank 24.

[0055] This eliminates the need for a distribution section communication section, an intermediate tank section, and a collection section communication section for communicating one header tank 24 with the other header tank 24. Therefore, it is possible to provide a heat exchanger 10 that allows for a simplified structure for circulating the refrigerant.

[0056] Furthermore, one of the tank-side holes 62 and the communication holes 90 is an elongated hole that is longer in the length direction of the header tank 24 than the other hole 90, and the one hole 62 communicates with a plurality of the other holes 90. Therefore, compared to when the tank-side holes 62 and the communication holes 90 have the same shape, even if the passage forming members 28 provided in each header tank 24 are misaligned, it is possible to prevent the communication passage formed by the communication between the tank-side holes 62 and the communication holes 90 from becoming narrower.

[0057] Furthermore, one header tank 24 can be connected to the other header tank 24 by the passage forming member 28. Therefore, the number of parts can be reduced compared to when one header tank 24 is connected to the other header tank 24 using a distribution section connecting section, an intermediate tank section, and a collection section connecting section.

[0058] Furthermore, the number of connections can be reduced compared to when one header tank 24 is connected to the other header tank 24 by sequentially connecting one header tank 24, the distribution section communication section, the intermediate tank section, the collection section communication section, and the other header tank 24. This reduces the cost of managing the connection accuracy at each connection section to prevent refrigerant leakage.

[0059] These features make it possible to reduce manufacturing costs.

[0060] The header tank 24 has a plurality of tube insertion ports 66 into which the tubes 26 are respectively inserted, and is formed in a cylindrical shape that is long in the arrangement direction of the tubes 26. When a virtual area 68 is imagined as extending in the circumferential direction of the header tank 24, passing through the connecting portions 64 provided between adjacent tank-side holes 62, some of the tube insertion ports 66 open into the virtual area 68.

[0061] With this configuration, the area that is divided in the length direction of the header tank 24 along the circumferential line where the tube insertion ports 66 are provided can be made smaller than when all of the tube insertion ports 66 are located at positions circumferentially offset from the tank-side holes 62.

[0062] This prevents a decrease in the rigidity of the header tank 24, and therefore, deformation of the header tank 24 when the tubes 26 are inserted can be suppressed without providing a separate reinforcing structure.

[0063] Furthermore, the length L1 of one hole 62 is longer than the length L2 from one end 92 to the other end 94 of the other adjacent pair of holes 90.

[0064] According to this configuration, even if the passage forming member 28 is positioned offset in the length direction of one of the holes 62, narrowing of the communication passage formed by communication between the tank-side hole 62 and the communication hole 90 is suppressed. This makes it possible to ensure the flow path area by the communication hole 90 without increasing the installation precision of the passage forming member 28 more than necessary.

[0065] Furthermore, in the passage forming member 28, it is possible to reduce the number of voids formed by the communication holes 90. Therefore, it is possible to suppress a decrease in the rigidity of the passage forming member 28 due to the presence of the communication holes 90.

[0066] Furthermore, one core portion 20 and the other core portion 22 arranged in a stacked manner are divided in the arranging direction of the tubes 26 and each have a plurality of divided core portions 30, 32, 34, 36, each with an independent refrigerant flow path. A passage forming member 28 is provided between each of the upper header tanks 40, 42, 50, 52 of each of the divided core portions 30, 32, 34, 36 arranged in a stacked manner.

[0067] According to this configuration, one core portion 20 and the other core portion 22 are composed of divided core portions 30, 32, 34, and 36, each having an independent refrigerant flow path, and heat exchange can be performed independently in each divided core portion 30, 32, 34, and 36.

[0068] Therefore, by using the heat exchanger 10, it is possible to appropriately control the temperature at each location in the vehicle interior space, for example, depending on the presence or absence of an occupant or the preference of the occupant.

[0069] Although the embodiments of the present invention have been described above, the above embodiments merely illustrate some of the application examples of the present invention, and it is not intended that the technical scope of the present invention be limited to the specific configurations of the above embodiments. [Explanation of symbols]

[0070] 10 Heat exchanger 12 Flow direction 20 Upstream core section 22 Downstream core section 24 Header Tank 26 tubes 28 Passage forming members 30 First divided core part 32 Second divided core part 34 Third divided core part 36 Fourth divided core part 62 Tank side hole 64 Connecting part 66 Tube insertion port 68 Virtual Realm 90 Communication hole 92 One end 94 the other end L1 length dimension L2 length dimension

Claims

1. A heat exchanger that performs heat exchange between a refrigerant that undergoes a phase change between a liquid phase and a gas phase and air, a core portion including a pair of header tanks disposed opposite to each other and a plurality of tubes connecting the header tanks and performing heat exchange between the refrigerant flowing through the header tanks and the air flowing around the header tanks, the core portion being stacked in the air flow direction; a passage forming member provided between one of the header tanks arranged in a stacked state and the other of the header tanks arranged in a stacked state; Equipped with one of the header tanks and the other of the header tanks have tank-side holes in portions facing each other, the passage forming member has a communication hole that communicates the tank-side holes that face each other, the tank-side hole of the tank-side hole and the communication hole is an elongated hole that is longer in the tank length direction than the communication hole, and the tank-side hole communicates with a plurality of the communication holes; a thickness dimension of a portion of the passage forming member in which the communication hole that connects the tank-side holes is formed is larger than a thickness dimension of a portion of the header tank in which the tank-side hole is formed; A heat exchanger characterized by:

2. 2. The heat exchanger of claim 1, The header tank has a plurality of tube insertion openings into which the tubes are respectively inserted, and is formed in a cylindrical shape that is long in the direction in which the tubes are arranged. When a virtual area is assumed to extend in the circumferential direction of the header tank, passing through a connecting portion provided between adjacent tank-side holes, the tube insertion port may be open to the virtual area. A heat exchanger characterized by:

3. 2. The heat exchanger of claim 1, The length dimension of the tank side hole is longer than the length dimension from one end to the other end of a pair of adjacent communication holes. A heat exchanger characterized by:

4. The heat exchanger according to any one of claims 1 to 3, The one core portion and the other core portion that are arranged in a stacked manner each have a plurality of divided core portions that are divided in an arrangement direction of the tubes and have independent refrigerant flow paths, The passage forming member is provided between the header tanks of each of the divided core portions arranged in a stacked manner. A heat exchanger characterized by:

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