Heat exchanger header, heat exchanger, and refrigeration cycle device

Abstract

This heat exchanger header (101) is provided with a body part (11) having a first surface (11A). The body part is provided with: an insertion hole (1A) which opens to the first surface and into which an end part of a heat transfer tube (20) is inserted; a stopper part (2A) which abuts at least a part of the end part of the heat transfer tube inserted into the insertion hole; a first space (S1) which is disposed on the opposite side of the insertion hole with respect to the stopper part in a first direction (DR1) intersecting the first surface, and which communicates with the insertion hole; and a second space (S2) which is disposed between the first surface and the stopper part in the first direction, and which communicates with the insertion hole. When viewed from the first direction, the second space is disposed outward relative to the insertion hole and the stopper part in a second direction (DR2) along the first surface.

Description

Heat exchanger header, heat exchanger, and refrigeration cycle device

[0001] The present disclosure relates to a heat exchanger header, a heat exchanger, and a refrigeration cycle device.

[0002] International Publication No. 2015 / 162689 (Patent Document 1) describes a header tank in a heat exchanger that is joined to multiple heat transfer tubes with brazing material, the header tank having a stopper portion provided in the tube insertion hole that positions the end of the heat transfer tube in the extension direction within the tube insertion hole. In the header tank, the width of the stopper portion when viewed from the arrangement direction of the multiple heat transfer tubes is configured to be smaller than the width of the tube insertion hole on the opposite side of the tank outer shell member and the width of the end of the tube in the extension direction.

[0003] International Publication No. 2015 / 162689

[0004] In conventional header tanks, it is expected that the joining material, such as brazing material, that flows into the stopper portion from the insertion hole will reach the end of the heat transfer tube and block at least a portion of the flow path of the heat transfer tube that opens at that end.

[0005] One object of the present disclosure is to provide a heat exchanger header that can prevent a bonding material from clogging a flow path of a heat transfer tube. Another object of the present disclosure is to provide a heat exchanger including such a heat exchanger header. Another object of the present disclosure is to provide a refrigeration cycle apparatus including such a heat exchanger.

[0006] A heat exchanger header according to the present disclosure includes a main body having a first surface. The main body has an insertion hole that opens to the first surface and into which an end of a heat transfer tube is inserted, a stopper that abuts at least a portion of the end of the heat transfer tube inserted into the insertion hole, a first space that is positioned on the opposite side of the insertion hole from the stopper in a first direction intersecting the first surface and that communicates with the insertion hole, and a second space that is positioned between the first surface and the stopper in the first direction and that communicates with the insertion hole. When viewed from the first direction, the second space is positioned outward of the insertion hole and the stopper in a second direction along the first surface.

[0007] According to the present disclosure, it is possible to provide a heat exchanger header that can prevent bonding material from blocking the flow path of a heat transfer tube, a heat exchanger that includes such a heat exchanger header, and a refrigeration cycle device that includes such a heat exchanger.

[0008] FIG. 4 is a diagram illustrating an example of a refrigeration cycle apparatus according to the present disclosure. FIG. 5 is a diagram illustrating an example of a heat exchanger according to the present disclosure. FIG. 6 is a cross-sectional view illustrating a heat exchanger header according to embodiment 1. FIG. 7 is a cross-sectional view taken along the arrows IV-IV in FIG. 3. FIG. 8 is a cross-sectional view illustrating a heat exchanger header according to a comparative example. FIG. 9 is a cross-sectional view illustrating a modified example of the heat exchanger header according to embodiment 1. FIG. 10 is a cross-sectional view illustrating a heat exchanger header according to embodiment 2. FIG. 11 is a cross-sectional view illustrating a heat exchanger header according to embodiment 3. FIG. 12 is a cross-sectional view illustrating a modified example of the heat exchanger header according to embodiment 3. FIG. 13 is a perspective view illustrating an exploded state of a heat exchanger header according to embodiment 4. FIG. 14 is a side view illustrating a heat exchanger header according to embodiment 4. FIG. 15 is a side view illustrating a heat exchanger header according to embodiment 5.

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference numerals, and description thereof will not be repeated.

[0010] 1 , a refrigeration cycle device 300 according to each embodiment includes a compressor 301, a four-way valve 302, a first heat exchanger 303, a pressure reducing device 304, a second heat exchanger 305, a first fan 306, a second fan 307, and a control device 310. At least one of the first heat exchanger 303 and the second heat exchanger 305 is provided as the heat exchanger according to each embodiment.

[0011] The compressor 301, the four-way valve 302, the first heat exchanger 303, the pressure reduction device 304, and the second heat exchanger 305 are connected to one another by a refrigerant pipe 308. As a result, the refrigeration cycle apparatus 100 includes a refrigerant circuit through which a refrigerant circulates. In the refrigeration cycle apparatus 100, the flow of the refrigerant in the refrigerant circuit is switched by the four-way valve 302. As shown in Fig. 1 , the refrigeration cycle apparatus 100 can switch between a first state in which the refrigerant flows through the compressor 301, the first heat exchanger 303, the pressure reduction device 304, and the second heat exchanger 305 in that order, and a second state in which the refrigerant flows through the compressor 301, the pressure reduction device 304, and the first heat exchanger 303 in that order.

[0012] In the first state, high-temperature, high-pressure gaseous refrigerant discharged from compressor 301 passes through four-way valve 302 and flows into first heat exchanger 303. In first heat exchanger 303, the refrigerant exchanges heat with air supplied by first fan 306, condenses, and becomes a high-pressure liquid. The refrigerant flowing out of first heat exchanger 303 is transformed into a low-pressure gas-liquid two-phase state by pressure reducing device 304 and flows into second heat exchanger 305. In second heat exchanger 305, the refrigerant exchanges heat with air supplied by second fan 307, evaporates, and becomes a low-pressure gaseous state. The refrigerant flowing out of second heat exchanger 305 passes through four-way valve 302 and is drawn into compressor 301.

[0013] In the second state, the high-temperature, high-pressure gaseous refrigerant discharged from the compressor 301 passes through the four-way valve 302 and flows into the second heat exchanger 305. In the second heat exchanger 305, the refrigerant exchanges heat with air supplied by the second fan 307, condenses, and becomes a high-pressure liquid. The refrigerant flowing out of the second heat exchanger 305 is converted into a low-pressure gas-liquid two-phase state by the pressure reducing device 304 and flows into the first heat exchanger 303. In the first heat exchanger 303, the refrigerant exchanges heat with air supplied by the first fan 306, evaporates, and becomes a low-pressure gaseous state. The refrigerant flowing out of the first heat exchanger 303 passes through the four-way valve 302 and is drawn into the compressor 301.

[0014] The refrigeration cycle apparatus 100 may be, for example, an air conditioner. The first heat exchanger 303 may be an outdoor heat exchanger, and the second heat exchanger 305 may be an indoor heat exchanger. In the refrigeration cycle apparatus 100, the flow path switching device for switching between the first state and the second state is not limited to the four-way valve 302, and may be a six-way valve. The refrigeration cycle apparatus 100 may be, for example, a refrigerator or a showcase. The refrigeration cycle apparatus 100 does not need to be equipped with the four-way valve 302.

[0015] 2 shows a heat exchanger 200 as an example of a heat exchanger according to each embodiment. As described above, in the refrigeration cycle apparatus 300 shown in FIG. 1, at least one of the first heat exchanger 303 and the second heat exchanger 305 is the heat exchanger 200.

[0016] As shown in FIG. 2 , the heat exchanger 200 includes a first header 201 , a second header 202 , and a heat exchange section 203 .

[0017] The first header 201 has a first refrigerant inlet / outlet section 201A, a plurality of first insertion holes 201B, and a plurality of first refrigerant flow paths connecting the first refrigerant inlet / outlet section 201A and each of the plurality of first insertion holes 201B. The second header 202 has a second refrigerant inlet / outlet section 202A, a plurality of second insertion holes 202B, and a plurality of second refrigerant flow paths connecting the second refrigerant inlet / outlet section 202A and each of the plurality of second insertion holes 202B.

[0018] The heat exchange unit 203 includes a plurality of fins 203 and a plurality of heat transfer tubes 20. Each of the plurality of heat transfer tubes 20 extends along the first direction DR1. Each of the plurality of heat transfer tubes 20 is arranged at intervals from one another in the third direction DR3.

[0019] Each of the plurality of first insertion holes 201B is connected to one end of each of the plurality of heat transfer tubes 20. Each of the plurality of second insertion holes 202B is connected to the other end of each of the plurality of heat transfer tubes 20. Each of the plurality of first insertion holes 201B is joined to one end of each of the plurality of heat transfer tubes 20 by a joining material. Each of the plurality of second insertion holes 202B is joined to the other end of each of the plurality of heat transfer tubes 20 by a joining material. The joining material is, for example, brazing material.

[0020] Each of the heat transfer tubes 20 is, for example, a flat tube. In this case, each of the heat transfer tubes 20 has a longitudinal direction and a lateral direction in a cross section perpendicular to its extension direction. The material constituting each of the heat transfer tubes 20 includes, for example, copper (Cu) or aluminum (Al). Note that each of the heat transfer tubes 20 may also be a circular tube.

[0021] The first refrigerant flow paths are connected in parallel to the first refrigerant inlet / outlet portion 201A, and the second refrigerant flow paths are connected in parallel to the second refrigerant inlet / outlet portion 202A.

[0022] The refrigerant that flows into the first header 201 from the first refrigerant inlet / outlet port 201A is distributed to each of the multiple first refrigerant flow paths and flows into each of the multiple heat transfer tubes 20 from the multiple first insertion holes 201B. The refrigerant flowing through each of the multiple heat transfer tubes 20 exchanges heat with air supplied by a fan (not shown), and then flows into the second header 202 from the multiple second insertion holes 202B. The refrigerant that has flowed into the second header 202 flows through the multiple second refrigerant flow paths, merges, and flows out of the second header 202 from the second refrigerant inlet / outlet port 202A.

[0023] The refrigerant that flows into the second header 202 from the second refrigerant inlet / outlet port 202A is distributed to each of the multiple second refrigerant flow paths and flows into each of the multiple heat transfer tubes 20 from the multiple second insertion holes 202B. The refrigerant flowing through each of the multiple heat transfer tubes 20 exchanges heat with air supplied by a fan (not shown), and then flows into the first header 201 from the multiple first insertion holes 201B. The refrigerant that has flowed into the first header 201 flows through the multiple first refrigerant flow paths, merges, and flows out of the first header 201 from the first refrigerant inlet / outlet port 201A.

[0024] At least one of the first header 201 and the second header 202 is provided as a heat exchanger header according to each embodiment described below.

[0025] The heat exchanger 200 is installed, for example, so that the first direction DR1 is aligned with the horizontal direction and the third direction DR3 is aligned with the vertical direction.

[0026] First Embodiment <Configuration of Heat Exchanger Header> Figure 3 is a cross-sectional view showing a joint portion between a heat exchanger header 101 according to the first embodiment and each of a plurality of heat transfer tubes 20. As shown in Figure 3, the heat exchanger header 101 according to the first embodiment includes a main body 11. The main body 11 has a first surface 11A. The first surface 11A is a surface facing the heat exchange section 203 and intersects with a first direction DR1 in which the heat transfer tubes 20 extend. The first surface 11A is, for example, perpendicular to the first direction DR1. The second direction DR2 and the third direction DR3 are two directions that extend along the first surface 11A and intersect with each other. When the heat transfer tubes 20 are flat tubes, the second direction DR2 extends along the longitudinal direction of the heat transfer tubes 20.

[0027] The main body 11 is provided with a plurality of insertion holes 1A, a plurality of stopper portions 2A, a plurality of first spaces S1, and a plurality of second spaces S2. The main body 11 is provided with a plurality of sets of insertion holes 1A, stopper portions 2A, first spaces S1, and second spaces S2 shown in Fig. 3, spaced apart from each other in the third direction DR3.

[0028] An end of one heat transfer tube 20 is inserted into each of the multiple insertion holes 1A. Each of the multiple insertion holes 1A opens to the first surface 11A. The central axis (hole axis) of each of the multiple insertion holes 1A is aligned with the first direction DR1. The internal space of each of the multiple insertion holes 1A is a space intended to be occupied by one heat transfer tube 20 and the bonding material 30.

[0029] Each of the stopper portions 2A is provided to abut at least a portion of the end portion in the first direction DR1 of one heat transfer tube 20 inserted into each insertion hole 1A. For example, each of the stopper portions 2A is provided to abut only the outer edge portion in the second direction DR2 of the end face in the first direction DR1 of one heat transfer tube 20 inserted into each insertion hole 1A. When viewed from the first direction DR1, the stopper portion 2A extends inward only in the second direction DR2 beyond the outer edge of the insertion hole 1A on the first surface 11A. Each of the stopper portions 2A prevents the end portion of each heat transfer tube 20 from entering the corresponding first space S1. Each of the stopper portions 2A faces the internal space of each insertion hole 1A.

[0030] Each of the multiple first spaces S1 is disposed on the opposite side of each of the multiple stopper portions 2A in the first direction DR1. Each of the multiple first spaces S1 is in communication with the internal space of each of the multiple insertion holes 1A. Each of the multiple first spaces S1 is arranged to overlap with at least a portion of the internal space of each of the multiple insertion holes 1A in the first direction DR1. Each of the multiple first spaces S1 is intended to serve as a flow path for the refrigerant flowing into the heat transfer tube 20 or the refrigerant flowing out of the heat transfer tube 20. Each of the first spaces S1 is arranged to constitute a portion of the first refrigerant flow path or the second refrigerant flow path.

[0031] Each of the second spaces S2 is disposed between the first surface 11A and each of the stopper portions 2A in the first direction DR1. Each of the second spaces S2 communicates with each of the insertion holes 1A. Each of the second spaces S2 communicates with the internal space of each of the insertion holes 1A. Each of the second spaces S2 is a space into which a portion of the bonding material 30 is intended to flow. Each of the second spaces S2 is disposed on the opposite side of each of the stopper portions 2A from each of the first spaces S1 in the first direction DR1.

[0032] As shown in FIG. 4 , when viewed from the first direction DR1, each of the multiple second spaces S2 is disposed outward from the outer edge of the first surface 11A of each insertion hole 1A in the second direction DR2. When viewed from the first direction DR1, each of the multiple second spaces S2 is disposed outward from the stopper portion 2A in the second direction DR2. Note that in FIG. 4 , the outer edge of each insertion hole 1A on the first surface 11A is indicated by a dashed line. Preferably, each second space S2 is also disposed outward from the outer edge of the first surface 11A of each insertion hole 1A in the third direction DR3. Preferably, when viewed from the first direction DR1, each second space S2 is provided as an annular space surrounding the outer edge of the first surface 11A of each insertion hole 1A. From a different perspective, each second space S2 is preferably provided as an annular space surrounding the end of the heat transfer tube 20 inserted into each insertion hole 1A.

[0033] The main body 11 is further provided with a first refrigerant inlet / outlet section 201A and the remaining portions of the first refrigerant flow paths, or a second refrigerant inlet / outlet section 202A and the remaining portions of the second refrigerant flow paths. The configurations of the first refrigerant inlet / outlet section 201A, the second refrigerant inlet / outlet section 202A, the remaining portions of the first refrigerant flow paths, and the remaining portions of the second refrigerant flow paths are not particularly limited.

[0034] The bonding material 30 is provided so as to close each insertion hole 1A when each of the plurality of heat transfer tubes 20 is inserted into each insertion hole 1A.

[0035] <Effects> Next, the effects of the heat exchanger header 101 will be described in comparison with a heat exchanger header according to a comparative example.

[0036] FIG. 5 is a cross-sectional view showing a heat exchanger header 400 according to a comparative example. The heat exchanger header 400 shown in FIG. 5 differs from the heat exchanger header 101 in that the second space S2 is not provided. In the heat exchanger header 400 shown in FIG. 5, a through hole 401A provided in the first plate-shaped member 401 and a hole 402C provided in the second plate-shaped member 402 on the first plate-shaped member 401 side form an insertion hole, and a hole 402A in the second plate-shaped member 402, which is connected to the hole 402C in the first direction DR1, forms a stopper portion. Therefore, in the heat exchanger header 400, when the heat exchanger header 400 is joined to the heat transfer tube 20 with the bonding material 430, a portion 431 of the bonding material 430 flows along the inner circumferential surface of the hole 402A, which forms the stopper portion, into the space S401 and blocks the flow path of the heat transfer tube 20.

[0037] In contrast, in the heat exchanger header 101, the second space S2 is disposed between the first surface 11A and the stopper portion 2A in the first direction DR1. Furthermore, as viewed in the first direction DR1, the second space S2 is disposed outward from the outer edge of the insertion hole 1A on the first surface 11A in the second direction DR2. This second space S2 can function as a space for retaining the bonding material 30 that flows into the heat exchanger header 101 from the insertion hole 1A when the heat exchanger header 101 is joined to the heat transfer tube 20 with the bonding material 30. As a result, in the heat exchanger header 101, a portion of the bonding material 30 that flows into the heat exchanger header 101 from the insertion hole 1A can be prevented from entering the first space S1 via the stopper portion 2A and blocking the flow path of the heat transfer tube 20.

[0038] In the heat exchanger header 101, each second space S2 is preferably disposed outward from the outer edge of the first surface 11A of each insertion hole 1A in the third direction DR3 as well. Such second spaces S2 can retain not only the bonding material 30 that flows into the heat exchanger header 101 from gaps between the inner circumferential surfaces of the insertion holes 1A facing each other in the second direction DR2 and the outer circumferential surfaces of the heat transfer tubes 20, but also the bonding material 30 that flows into the heat exchanger header 101 from gaps between the inner circumferential surfaces of the insertion holes 1A facing each other in the third direction DR3.

[0039] In the heat exchanger header 101, when the insertion hole 1A has a longitudinal direction and a lateral direction, i.e., when the heat transfer tube 20 is a flat tube, the stopper portion 2A preferably extends inward from the outer edge of the insertion hole 1A only in the second direction DR2. In a typical flat tube, the distance between each of the plurality of refrigerant flow paths provided in the flat tube and both ends of the flat tube in the longitudinal direction is longer than the distance between each of the plurality of refrigerant flow paths provided in the flat tube and both ends of the flat tube in the lateral direction. Therefore, when the stopper portion 2A extends inward from the outer edge of the insertion hole 1A only in the second direction DR2, the risk of the bonding material 30 reaching the stopper portion 2A blocking at least a portion of the refrigerant flow path of the flat tube can be further reduced compared to when the stopper portion 2A also extends inward from the outer edge of the insertion hole 1A in the third direction DR3, i.e., when the stopper portion 2A is arranged to contact both ends of the flat tube in the lateral direction.

[0040] In addition, in the heat exchanger header 101, as described above, it is difficult for the bonding material 30 to reach the stopper portion 2A, so even if the stopper portion 2A extends inward beyond the outer edge of the insertion hole 1A in the third direction DR3, the bonding material 30 can be prevented from blocking the flow path of the heat transfer tube 20.

[0041] According to the heat exchanger 200 including the heat exchanger header 101, the blockage of the flow paths of the heat transfer tubes 20 by the bonding material 30 can be suppressed in the heat exchanger header 101, and therefore, a decrease in performance due to the blockage can be suppressed. According to the refrigeration cycle device 300 including the heat exchanger 200, the blockage of the flow paths of the heat transfer tubes 20 can be suppressed, and therefore, a decrease in performance due to the blockage can be suppressed.

[0042] 3, the main body 11 of the heat exchanger header 101 may be provided as a so-called stacked header. The main body 11 has, for example, a plurality of members stacked so as to overlap each other in the first direction DR1.

[0043] The main body 11 has, for example, a first member 1, a second member 2, and a fourth member 4. The multiple insertion holes 1A and at least a portion of each of the multiple second spaces S2 are provided in the first member 1. The multiple stopper portions 2A and the multiple first spaces S1 are provided in the second member 2. The remainder of the multiple first refrigerant flow paths or the multiple second refrigerant flow paths is provided in the fourth member 4. The first member 1, the second member 2, and the fourth member 4 are joined together by a joining material.

[0044] The first member 1 has a first surface 11A and a second surface 1C located on the opposite side of the first surface 11A in the first direction DR1. The first member 1 has a plurality of first through holes 1H formed therein, extending from the first surface 11A to the second surface 1C. The central axis of each of the plurality of first through holes 1H is aligned with the first direction DR1. Each of the plurality of first through holes 1H has a first hole portion 1HA and a second hole portion 1HB extending in the first direction DR1. The first hole portion 1HA opens onto the first surface 11A. The second hole portion 1HB opens onto the second surface 1C. The open end of the first hole portion 1HA located on the opposite side of the first surface 11A in the first direction DR1 is connected to the open end of the second hole portion 1HB located on the first surface 11A side in the first direction DR1.

[0045] The opening width W1 of the first hole portion 1HA in the second direction DR2 is constant regardless of the position in the first direction DR1. The opening width W1 of the first hole portion 1HA in the second direction DR2 is wider than the width of the heat transfer tube 20 in the longitudinal direction.

[0046] The maximum opening width W2 of the second hole portion 1HB in the second direction DR2 is larger than the opening width W1 of the first hole portion 1HA in the second direction DR2. The opening width of the second hole portion 1HB in the second direction DR2 gradually increases with increasing distance from the first surface 11A in the first direction DR1. The minimum opening width of the second hole portion 1HB in the second direction DR2 is equal to the opening width W1 of the first hole portion 1HA in the second direction DR2.

[0047] The opening width of the first hole portion 1HA in the third direction DR3 is constant regardless of the position in the first direction DR1. The opening width of the first hole portion 1HA in the third direction DR3 is wider than the width of the heat transfer tube 20 in the short direction.

[0048] The maximum value of the opening width of the second hole portion 1HB in the third direction DR3 is larger than the opening width of the first hole portion 1HA in the third direction DR3. The opening width of the second hole portion 1HB in the third direction DR3 gradually increases with increasing distance from the first surface 11A in the first direction DR1.

[0049] Each of the first hole portion 1HA and the second hole portion 1HB of the first through hole 1H has a first set of inner circumferential surfaces facing the second direction DR2 and a second set of inner circumferential surfaces corresponding to the third direction DR3. In the first hole portion 1HA, the spacing between the first set of inner circumferential surfaces is constant, for example, regardless of the position in the first direction DR1. In the first hole portion 1HA, the spacing between the second set of inner circumferential surfaces is constant, for example, regardless of the position in the first direction DR1. In the second hole portion 1HB, the spacing between the first set of inner circumferential surfaces gradually increases, for example, toward the second member 2 in the first direction DR1. In the second hole portion 1HB, the spacing between the second set of inner circumferential surfaces gradually increases, for example, toward the second member 2 in the first direction DR1. In the first set of inner circumferential surfaces of the second hole portion 1HB, the rate of change of the spacing per unit length in the first direction DR1 is constant, for example. On the second set of inner circumferential surfaces of the second hole portion 1HB, the rate of change of the interval per unit length in the first direction DR1 is, for example, constant.

[0050] The opening width W1 of the first hole portion 1HA in the second direction DR2 may gradually increase or decrease, for example, as the distance from the first surface 11A increases in the first direction DR1. Similarly, the opening width of the first hole portion 1HA in the third direction DR3 may gradually increase or decrease as the distance from the first surface 11A increases in the first direction DR1. The opening width W1 of the second hole portion 1HB in the second direction DR2 may increase in stages as the hole approaches the second member 2 in the first direction DR1. Similarly, the opening width of the second hole portion 1HB in the third direction DR3 may increase in stages as the hole approaches the second member 2 in the first direction DR1. In the first set of inner circumferential surfaces of the second hole portion 1HB, the rate of change of the spacing per unit length in the first direction DR1 does not have to be constant.

[0051] The second member 2 is provided with a plurality of second through holes 2H penetrating in the first direction DR1. The central axis of each of the plurality of second through holes 2H is aligned with the first direction DR1. The second through hole 2H has a third hole portion 2HA and a fourth hole portion 2HB continuing in the first direction DR1. The third hole portion 2HA opens onto a surface of the second member 2 facing the first member 1. The fourth hole portion 2HB opens onto a surface of the second member 2 facing away from the first member 1. The open end of the third hole portion 2HA located on the fourth hole portion 2HB side in the first direction DR1 is connected to the open end of the fourth hole portion 2HB located on the third hole portion 2HA side in the first direction DR1.

[0052] The maximum value W3 of the opening width of the third hole portion 2HA in the second direction DR2 is larger than the opening width W4 of the fourth hole portion 2HB in the second direction DR2. The opening width of the third hole portion 2HA in the second direction DR2 gradually increases, for example, in the first direction DR1 toward the first member 1. The maximum value W3 of the opening width of the third hole portion 2HA in the second direction DR2 is larger than the longitudinal width of the heat transfer tube 20. The minimum value of the opening width of the third hole portion 2HA in the second direction DR2 is equal to the opening width W4 of the fourth hole portion 2HB in the second direction DR2 and is smaller than the longitudinal width of the heat transfer tube 20.

[0053] The opening width W4 of the fourth hole portion 2HB in the second direction DR2 is constant, for example, regardless of the position in the first direction DR1.

[0054] The opening width of the third hole portion 2HA in the third direction DR3 is constant regardless of the position in the first direction DR1, for example. The opening width of the third hole portion 2HA in the third direction DR3 is wider than the width of the heat transfer tube 20 in the short direction.

[0055] The opening width of the fourth hole portion 2HB in the third direction DR3 is constant regardless of the position in the first direction DR1, for example. The opening width of the fourth hole portion 2HB in the third direction DR3 is wider than the width of the heat transfer tube 20 in the short direction.

[0056] The fourth member 4 includes, for example, a fifth member 5, a sixth member 6, and a seventh member 7. The fifth member 5 has a plurality of fifth through holes 5H. The sixth member 6 has a plurality of sixth through holes 6H. The seventh member 7 has a seventh through hole 7H. The internal space of each of the fifth through holes 5H connects each of the first spaces S1 to each of the sixth through holes 6H. The internal space of each of the sixth through holes 6H connects the internal space of the seventh through hole 7H to each of the fifth through holes 5H. The seventh through hole 7H is connected to the first refrigerant inflow / outflow portion 201A or the second refrigerant inflow / outflow portion 202A. The central axes of each of the fifth through holes 5H, the sixth through holes 6H, and the seventh through holes 7H are aligned along the first direction DR1.

[0057] Each of the first member 1, the second member 2, the fifth member 5, the sixth member 6, and the seventh member 7 can be prepared, for example, as a plate-like member. Each of the first member 1, the second member 2, the fifth member 5, the sixth member 6, and the seventh member 7 is joined to one another, for example, by a bonding material. The dimension (thickness) of each of the plate-like members in the first direction DR1 is, for example, 1 mm or more and 10 mm or less. In each of the first member 1, the second member 2, the fifth member 5, the sixth member 6, and the seventh member 7, the above-mentioned through holes can be easily formed, for example, by cutting.

[0058] In the heat exchanger header 101 shown in FIG. 3 , the multiple insertion holes 1A and all of the multiple second spaces S2 are provided in the first member 1, and the multiple stopper portions 2A and the multiple first spaces S1 are provided in the second member 2. The first member 1 and the second member 2 can be easily manufactured as independent members. Furthermore, the first member 1 and the second member 2 can be easily joined using a bonding material. Therefore, the heat exchanger header 101 having the first member 1 and the second member 2 can be manufactured more easily than a heat exchanger header in which the multiple insertion holes 1A, the multiple second spaces S2, the multiple stopper portions 2A, and the multiple first spaces S1 are provided in the same member.

[0059] <Refrigerant flow in the heat exchanger header> The refrigerant that flows from the first refrigerant inlet / outlet section 201A or the second refrigerant inlet / outlet section 202A into the internal space of the seventh through hole 7H passes through the internal space of each of the multiple sixth through holes 6H, the internal space of each of the multiple fifth through holes 5H, and each of the multiple first spaces S1, and is distributed to each of the multiple heat transfer tubes 20.

[0060] The refrigerant that flows from each of the multiple heat transfer tubes 20 into each of the multiple first spaces S1 passes through the internal space of each of the multiple fifth through holes 5H, the internal space of each of the multiple sixth through holes 6H, and the internal space of the seventh through hole 7H, and flows out from the first refrigerant inflow / outflow section 201A or the second refrigerant inflow / outflow section 202A.

[0061] The heat exchanger header 101 is installed, for example, so that the first direction DR1 and the second direction DR2 are aligned horizontally, and the third direction DR3 is aligned vertically.

[0062] <Modifications> In the heat exchanger header 101, the fourth member 4 may be formed from a single member. Also, in the heat exchanger header 101, the first member 1 and the second member 2 may be formed from a single member. Also, in the heat exchanger header 101, the main body 11 may be formed from a single member. In such a heat exchanger header 101, although ease of manufacture is reduced compared to when the main body 11 has multiple members, clogging of the flow passages of the heat transfer tubes by the bonding material can be suppressed.

[0063] 6 , in the heat exchanger header 101, a portion of the second space S2 may be provided in the second member 2. The second through hole 2H of the second member 2 may further have a fifth hole 2HC for forming a portion of the second space S2, located closer to the first surface 11A in the first direction DR1 than the third hole 2HA forming the stopper portion. The maximum value of the opening width of the fifth hole 2HC in the second direction DR2 is greater than the maximum value of the opening width of the third hole 2HA in the second direction DR2. A pair of inner circumferential surfaces of the fifth hole 2HC facing the second direction DR2 may be inclined with respect to the first direction DR1.

[0064] Embodiment 2. A heat exchanger header 102 according to embodiment 2 will be described with reference to Fig. 7. Unless otherwise specified, the heat exchanger header 102 according to embodiment 2 has the same configuration and effects as the heat exchanger header 101 according to embodiment 1 described above. Therefore, the same components as those in the heat exchanger header 101 described above are denoted by the same reference numerals, and description thereof will not be repeated.

[0065] 7, the heat exchanger header 102 includes a main body 12. The main body 12 differs from the main body 11 in that the main body 12 further includes a third member 3.

[0066] The first member 1, the third member 3, the second member 2, and the fourth member 4 are stacked in the first direction DR1 in this order. The third member 3 is disposed between the first member 1 and the second member 2 in the first direction DR1.

[0067] The third member 3 is provided with a third through hole 3H penetrating in the first direction DR1. The opening width of the third through hole 3H in the second direction DR2 is constant, for example, in the first direction DR1. The opening width W5 of the third through hole 3H in the second direction DR2 is larger than the opening width W1 of the first hole portion 1HA in the second direction DR2. The opening width W5 of the third through hole 3H in the second direction DR2 is larger than the maximum opening width W3 of the third hole portion 2HA of the second through hole 2H in the second direction DR2.

[0068] As shown in FIG. 7 , the insertion hole 1A is provided as a first through hole 1H that penetrates the first member 1 in the first direction DR1. The opening width of the insertion hole 1A provided in the first member 1 in the second direction DR2 is constant, for example, in the first direction DR1. The insertion hole 1A does not have, for example, the second hole portion 1HB shown in FIG. 3 . In the heat exchanger header 102 shown in FIG. 7 , the entire second space S2 is provided within the third through hole 3H of the third member 3.

[0069] According to the heat exchanger header 102, at least a portion of the second space S2 is provided within the third through hole 3H of the third member 3 disposed between the first member 1 and the second member 2, and therefore the volume of the second space S2 can be adjusted by at least one of the thickness of the third member 3 and the opening width of the third through hole 3H. Therefore, according to the heat exchanger header 102, it is easier to adjust the volume of the second space S2 than with the heat exchanger header 101, which does not include the third member 3.

[0070] <Modifications> The heat exchanger header 102 can also be modified in the same manner as the modification of the heat exchanger header 101. In the heat exchanger header 102, as in the heat exchanger header 101 shown in FIG. 6 , a portion of the second space S2 may be provided in the second member 2. The second space S2 may be provided as a space that communicates with the third member 3 and the second member 2.

[0071] In the heat exchanger header 102, the first through-hole 1H provided in the first member 1 may have a second hole portion 1HB shown in Fig. 3. The second space S2 may be provided as a space communicating with each of the first member 1, the third member 3, and the second member 2.

[0072] In the heat exchanger header 102, the opening width of the third through hole 3H in the second direction DR2 may vary in the first direction DR1. In this case, it is sufficient that the maximum opening width W5 of the third through hole 3H in the second direction DR2 is larger than the opening width W1 of the first hole portion 1HA in the second direction DR2 and larger than the maximum opening width W3 of the third hole portion 2HA of the second through hole 2H in the second direction DR2.

[0073] Embodiment 3. A heat exchanger header 103 according to embodiment 3 will be described with reference to Fig. 8. The heat exchanger header 103 according to embodiment 3 has the same configuration and effects as the heat exchanger header 101 according to embodiment 1 described above, unless otherwise specified. Therefore, the same components as those in the heat exchanger header 101 described above are denoted by the same reference numerals, and description thereof will not be repeated.

[0074] 8, the second through hole 2H has a first opening end 2H1 located on the first member 1 side in the first direction DR1, and a second opening end 2H2 located on the opposite side from the first member 1 in the first direction DR1. The first opening end 2H1 faces the second hole portion 1HB of the first through hole 1H provided in the first member 1. The second opening end 2H2 contacts the surface of the fifth member 5 facing the first surface 11A.

[0075] The opening width of the second through hole 2H in the second direction DR2 gradually decreases from the first opening end 2H1 to the second opening end 2H2 in the first direction DR1. Each of a pair of inner circumferential surfaces of the second through hole 2H facing the second direction DR2 is an inclined surface inclined with respect to the central axis of the second through hole 2H extending along the first direction DR1. The width of the first space S1 in the second direction DR2 gradually decreases toward the fifth member 5 in the first direction DR1.

[0076] Preferably, the opening width of the second through hole 2H in the third direction DR3 also gradually decreases from the first opening end 2H1 to the second opening end 2H2 in the first direction DR1.

[0077] In the heat exchanger header 103, the opening width of the second through-hole 2H in the second direction DR2 gradually decreases from the first opening end 2H1 to the second opening end 2H2 in the first direction DR1, which makes it difficult for separation of the refrigerant flow on the inner circumferential surface of the second through-hole 2H. As a result, in the heat exchanger header 103, an increase in pressure loss of the refrigerant flowing through the first space S1 can be suppressed.

[0078] <Modifications> The heat exchanger header 103 can also be modified in the same manner as the modification of the heat exchanger header 101. In the heat exchanger header 103, as in the heat exchanger header 101 shown in FIG. 6 , a portion of the second space S2 may be provided in the second member 2. The second space S2 may be provided as a space that communicates with the third member 3 and the second member 2.

[0079] The opening width of the second through hole 2H in the third direction DR3 may be constant in the first direction DR1.

[0080] As shown in Figure 9, the heat exchanger header 103 may have a configuration similar to that of the heat exchanger header 102, except that the opening width of the second through hole 2H in the second direction DR2 gradually decreases in the first direction DR1 from the first opening end 2H1 to the second opening end 2H2.

[0081] 10 and 11, a heat exchanger header 104 according to a fourth embodiment will be described. Unless otherwise specified, the heat exchanger header 104 according to the fourth embodiment has the same configuration and effect as the heat exchanger header 102 according to the second embodiment. Therefore, the same components as those in the heat exchanger header 102 are denoted by the same reference numerals, and description thereof will not be repeated.

[0082] 10 and 11 , each of the plurality of first spaces S1 has a first space portion S1A and a second space portion S1B that extend along the first surface 11A and in two directions that intersect with each other. The first space portion S1A extends, for example, along the second direction DR2. The second space portion S1B extends, for example, along the third direction DR3.

[0083] In each of the multiple first spaces S1, the first spatial portion S1A and the second spatial portion S1B are in communication with each other. When viewed from the first direction DR1, the first spatial portion S1A and the second spatial portion S1B have, for example, an L-shape or a T-shape. Of the first spatial portion S1A and the second spatial portion S1B, only the first spatial portion S1A is arranged so as to overlap with each of the multiple insertion holes 1A in the first direction DR1. The first spatial portion S1A and the second spatial portion S1B are closed on the side opposite the insertion hole 1A in the first direction DR1.

[0084] The main body 14 is provided with a plurality of third spaces S3 that connect the second space portions S1B of two or more of the plurality of first spaces S1 to each other.

[0085] The first space portion S1A and the second space portion S1B of the first space S1 are provided in the second member 2. The third space S3 is provided in the third member 3, for example.

[0086] The second member 2 has a plurality of second through holes 2H arranged at intervals in the third direction DR3. In the second member 2, the fourth hole portion 2HB of each of the plurality of second through holes 2H has a sixth hole portion 2BA and a seventh hole portion 2BB. The first spatial portion S1A is provided within the sixth hole portion 2BA. The second spatial portion S1B is provided within the seventh hole portion 2BB. The sixth hole portion 2BA has a configuration similar to the fourth hole portion 2HB of the second through hole 2H shown in FIGS. 3 and 4. One end of the seventh hole portion 2BB in the extension direction is continuous with the sixth hole portion 2BA. For example, in some of the plurality of second through holes 2H, one end of the seventh hole portion 2BB in the extension direction is continuous with an end of the sixth hole portion 2BA in the extension direction. The remaining second through holes 2H have one end in the extension direction of the seventh hole portion 2BB connected to a portion of the sixth hole portion 2BA other than the end in the extension direction. In the second through holes 2H, the third hole portion 2HA is provided, for example, only in a region that overlaps with the sixth hole portion 2BA in the first direction DR1. Note that in the second through holes 2H, it is sufficient that the third hole portion 2HA is provided at least in a region that overlaps with the sixth hole portion 2BA in the first direction DR1.

[0087] The open end of the second through hole 2H, which is located on the opposite side to the insertion hole 1A in the first direction DR1, is closed by a fifth member 5.

[0088] The second member 2 is further provided with a plurality of eighth through holes 2I penetrating in the first direction DR1. Each of the plurality of eighth through holes 2I is disposed between two sixth hole portions 2BA adjacent to each other in the third direction DR3, and is also disposed between two seventh hole portions 2BB adjacent to each other in the second direction DR2.

[0089] The third member 3 has a plurality of third through holes 3H arranged at intervals in the third direction DR3. The third member 3 is further provided with a plurality of ninth through holes 3I penetrating in the first direction DR1 between two third through holes 3H adjacent to each other in the third direction DR3. Each of the plurality of ninth through holes 3I extends, for example, along the second direction DR2. A third space S3 is provided within the ninth through hole 3I.

[0090] The open end of the ninth through hole 3I located on the insertion hole 1A side in the first direction DR1 is closed by the first member 1.

[0091] The sixth hole portion 2BA of the second through hole 2H is provided to overlap with the third through hole 3H and the first through hole 1H in the first direction DR1. The seventh hole portion 2BB of the second through hole 2H is provided to overlap with parts of the third through hole 3H and the ninth through hole 3I in the first direction DR1. The eighth through hole 2I is provided to overlap with another part of the ninth through hole 3I, the fifth through hole 5H, and the sixth through hole 6H in the first direction DR1.

[0092] The following describes the flow of refrigerant in the heat exchanger header 104. First, the flow of refrigerant flowing from the heat exchanger header 104 into the heat transfer tubes 20 will be described.

[0093] The refrigerant that has flowed into the seventh through hole 7H of the seventh member 7 flows along the first direction DR1 through the interiors of the sixth through hole 6H, the fifth through hole 5H, and the eighth through hole 2I, and then flows into the third space S3 inside the ninth through hole 3I. The refrigerant that has flowed into the third space S3 collides with a surface of the first member 1 that is located on the opposite side from the first surface 11A. The flow of the refrigerant that has collided with the first member 1 branches into the second direction DR2 within the third space S3.

[0094] A portion of the refrigerant that collides with the first member 1 flows to one side in the second direction DR2 within the third space S3 and flows into one of two second spatial portions S1B that communicate with the third space S3. The refrigerant that flows into one second spatial portion S1B collides with a surface of the fifth member 5 that is located on the first surface 11A side, flows along the third direction DR3, and flows into the first spatial portion S1A that communicates with one second spatial portion S1B. The refrigerant that flows into the first spatial portion S1A flows into a first heat transfer tube 20 of the plurality of heat transfer tubes 20.

[0095] The remainder of the refrigerant that collided with the first member 1 flows to the other side of the second direction DR2 within the third space S3 and flows into the other of the two second spatial portions S1B that communicate with the third space S3. The refrigerant that flows into the other second spatial portion S1B collides with a surface of the fifth member 5 that is located on the first surface 11A side, flows along the third direction DR3, and flows into the first spatial portion S1A that communicates with the other second spatial portion S1B. The refrigerant that flows into the first spatial portion S1A flows into a second heat transfer tube 20 of the plurality of heat transfer tubes 20.

[0096] The flow of the refrigerant that has flowed from the heat transfer tubes 20 into the heat exchanger header 104 is opposite to the flow of the refrigerant that has flowed from the heat exchanger header 104 into the heat transfer tubes 20 described above.

[0097] The heat exchanger header 104 is installed, for example, such that the first direction DR1 and the second direction DR2 are aligned horizontally, and the third direction DR3 is aligned vertically.

[0098] The effects of the heat exchanger header 104 will be described by comparing it with a comparative heat exchanger header in which the refrigerant flowing through the header is not branched. In the comparative heat exchanger header, if the insertion depths of the heat transfer tubes 20 vary, the flow rate of the refrigerant distributed from the heat exchanger header to the flow paths of the heat transfer tubes will vary accordingly. In contrast, in the heat exchanger header 104, the refrigerant flowing through the header branches in at least two directions. This reduces the variation in the flow rate of the refrigerant distributed from the heat exchanger header 104 to the flow paths of the heat transfer tubes 20, even if the insertion depths of the heat transfer tubes 20 vary. As a result, the performance of a heat exchanger equipped with the heat exchanger header 104 can be improved.

[0099] In particular, in the heat exchanger header 104 shown in FIGS. 10 and 11, the refrigerant can be branched multiple times, so that the variation in the flow rate of the refrigerant distributed to each heat transfer tube 20 can be more effectively suppressed.

[0100] <Modifications> The heat exchanger header 104 can also be modified in the same manner as the modification of the heat exchanger header 102. In the heat exchanger header 104, as in the heat exchanger header 101 shown in Fig. 6 , a portion of the second space S2 may be provided in the second member 2. The second space S2 may be provided as a space continuing to the third member 3 and the second member 2. In the heat exchanger header 104, as in the heat exchanger header 103 shown in Fig. 8 , the opening widths in the second direction DR2 of the sixth hole portion 2BA and the seventh hole portion 2BB of the second through hole 2H may gradually decrease in the first direction DR1 from the first opening end 2H1 to the second opening end 2H2.

[0101] Fifth Embodiment A heat exchanger header 105 according to a fifth embodiment will be described with reference to Fig. 12. The heat exchanger header 105 according to the fifth embodiment has the same configuration and effect as the heat exchanger header 104 according to the fifth embodiment, unless otherwise specified. Therefore, the same components as those in the heat exchanger header 104 are denoted by the same reference numerals, and description thereof will not be repeated.

[0102] 12 , the heat exchanger header 105 is configured so that the second direction DR2 is inclined with respect to the horizontal direction. The extension directions of the insertion holes 1A and the first spaces S1 are inclined with respect to the horizontal direction. The extension directions of the first through holes 1H, the sixth hole portions 2BA of the second through holes 2H, and the third through holes 3H are inclined with respect to the horizontal direction. The second direction DR2 is inclined with respect to, for example, both the horizontal direction and the vertical direction.

[0103] The effects of the heat exchanger header 105 will be described by comparing it with the heat exchanger header of the comparative example, in which the refrigerant flowing through the header is not branched. As described above, in the heat exchanger header of the comparative example, if the insertion depths of the heat transfer tubes 20 vary, this variation will result in variation in the flow rate of the refrigerant distributed from the heat exchanger header to each flow path of each heat transfer tube. This variation is particularly significant when the heat transfer tubes are flat tubes whose longitudinal directions are inclined relative to the horizontal. This is because the amount of refrigerant remaining in each flow path in the heat exchanger header changes depending on the horizontal position, which tends to result in variation in the flow rate of the refrigerant distributed from each flow path in the heat exchanger header to each flow path of each heat transfer tube.

[0104] Because the heat exchanger header 105 allows the refrigerant flowing therethrough to branch in at least two directions, even if there is variation in the insertion depths of the heat transfer tubes 20, each of which has a longitudinal direction inclined relative to the horizontal, it is possible to suppress variation in the flow rate of the refrigerant distributed from the heat exchanger header 105 to each heat transfer tube 20. As a result, the performance of a heat exchanger equipped with the heat exchanger header 105 can be improved.

[0105] <Modifications> The heat exchanger header 105 can also be modified in the same manner as the modification of the heat exchanger header 104 .

[0106] Although the embodiments of the present disclosure have been described above, the above-described embodiments can be modified in various ways. Furthermore, the scope of the present disclosure is not limited to the above-described embodiments. The scope of the present disclosure is defined by the scope of the claims, and is intended to include all modifications within the meaning and scope of the claims.

[0107] 1 First member, 1A Insertion hole, 1C Second surface, 1H First through hole, 1HA First hole portion, 1HB Second hole portion, 2 Second member, 2A Stopper portion, 2BA Sixth hole portion, 2BB Seventh hole portion, 2C Fifth hole portion, 2H Second through hole, 2H1 First opening end, 2H2 Second opening end, 2HA Third hole portion, 2HB Fourth hole portion, 2I Eighth through hole, 3 Third member, 3H Third through hole, 3I Ninth through hole, 4 Fourth member, 5 Fifth member, 5H Fifth through hole, 6 Sixth member, 6H Sixth through hole, 7 Seventh member, 7H Seventh through hole, 11, 12, 14 Main body portion, 11A First surface, 20 Heat transfer tube, 30 Bonding material, 100 Refrigeration cycle device, 101 Heat exchanger header, 102 Heat exchanger header, 103 Heat exchanger header, 104 Heat exchanger header, 105 Heat exchanger header, 200 Heat exchanger, 201 First header, 201A First refrigerant inlet / outlet portion, 201B First insertion hole, 202 Second header, 202A Second refrigerant inlet / outlet portion, 202B Second insertion hole, 203 Heat exchange portion, 203 Fin, 300 Refrigeration cycle device, 301 Compressor, 302 Four-way valve, 303 First heat exchanger, 304 Pressure reducing device, 305 Second heat exchanger, 306 First fan, 307 Second fan, 308 Refrigerant piping, 310 Control device.

Claims

1. A heat exchanger header comprising: a main body having a first surface; an insertion hole that opens to the first surface and into which an end of a heat transfer tube is inserted; a stopper that abuts against at least a portion of the end of the heat transfer tube inserted into the insertion hole; a first space that is arranged on the opposite side of the insertion hole with respect to the stopper in a first direction that intersects with the first surface and that communicates with the insertion hole; and a second space that is arranged between the first surface and the stopper in the first direction and that communicates with the insertion hole, wherein when viewed from the first direction, the second space is arranged outward of the insertion hole and the stopper in a second direction along the first surface.

2. A heat exchanger header as described in claim 1, wherein, when viewed from the first direction, the second space is positioned outside the outer edge of the insertion hole in a third direction that is along the first surface and intersects the second direction.

3. A heat exchanger header as described in claim 1 or 2, wherein, when viewed from the first direction, the insertion hole has a longitudinal direction and a lateral direction, the second direction is along the longitudinal direction, and when viewed from the first direction, the stopper portion extends inward beyond the outer edge of the insertion hole only in the second direction.

4. A heat transfer tube is provided with: a plurality of insertion holes into which ends of each of the plurality of heat transfer tubes are inserted; a plurality of stopper portions that abut against at least a portion of the ends of each of the plurality of heat transfer tubes inserted into each of the plurality of insertion holes; a plurality of first spaces that are arranged on the opposite side of each of the plurality of insertion holes with respect to each of the plurality of stopper portions in the first direction and communicate with each of the plurality of insertion holes; and a plurality of second spaces that are arranged between the first surface and each of the plurality of stopper portions in the first direction and communicate with each of the plurality of insertion holes, each of the plurality of first spaces having a first spatial portion and a second spatial portion that extend along the first surface and in two directions that intersect with each other, and in each of the plurality of first spaces, the first spatial portion and the second spatial portion communicate with each other, and only the first spatial portion of the first spatial portion and the second spatial portion is arranged so as to overlap with each of the plurality of insertion holes in the first direction, A heat exchanger header as described in any one of claims 1 to 3, wherein the main body portion has a third space that connects the second space portions of two or more of the plurality of first spaces.

5. A heat exchanger header as described in claim 4, wherein, when viewed from the first direction, the insertion hole has a longitudinal direction and a lateral direction, the second direction is along the longitudinal direction, and the second direction is a direction inclined with respect to a horizontal plane.

6. A heat exchanger header as described in any one of claims 1 to 5, wherein the main body portion includes a plurality of members stacked so as to overlap each other in the first direction, and the plurality of members include a first member having the first surface and having at least the insertion hole provided therein, and a second member having at least the stopper portion and the first space provided therein.

7. The heat exchanger header according to claim 6, wherein at least a portion of said second space is provided in said first member.

8. A heat exchanger header as described in claim 6, wherein the plurality of members further includes a third member, the first member, the third member, and the second member are stacked one on top of the other in the order listed in the first direction, and at least a portion of the second space is provided in the third member.

9. A heat exchanger header as described in any one of claims 6 to 8, wherein a second through hole is provided penetrating the second member in the first direction, the second through hole having a first opening end located on the first member side in the first direction and a second opening end located on the opposite side from the first member in the first direction, and the opening width of the second through hole in the second direction gradually decreases from the first opening end toward the second opening end in the first direction.

10. A heat exchanger comprising: a heat exchanger header according to any one of claims 1 to 9; a heat transfer tube inserted into the insertion hole; and a brazing material that joins the heat transfer tube and the heat exchanger header.

11. A refrigeration cycle device comprising a refrigerant circuit including a compressor, a condenser, a pressure reducing device, and an evaporator, wherein at least one of the condenser and the evaporator is the heat exchanger according to claim 10.

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