Heat exchanger, heat exchanger unit, and refrigeration cycle device

Abstract

To provide a heat exchanger, a heat exchanger unit, and a refrigeration cycle device that can stably operate by more smoothly supplying a refrigerant to flattened tubes.SOLUTION: A heat exchanger comprises: a plurality of flattened tubes having a flattened plate shape, inside which flow passages are formed, and arranged at intervals in a vertical direction; a header for supplying a refrigerant to the flow passages by communicating with each of the plurality of flattened tubes; and an inflow tube for guiding the refrigerant into the header. The header comprises a header body comprising a space inside which the refrigerant flows, and a partition plate for partitioning the space in the header body into a first space on a side of the flattened tubes and a second space on a side opposite to the first space by extending in the vertical direction. A communication hole for establishing communication between the first space and the second space is formed in a lower end part of the partition plate. The header also comprises a pair of baffle plates provided on both sides in a width direction of the communication hole, and for reducing an opening area of the communication hole.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to a heat exchanger, a heat exchanger unit, and a refrigeration cycle apparatus. [Background technology]

[0002] 2. Description of the Related Art A multi-flow heat exchanger including a plurality of flat tubes, a plurality of fins, and a pair of headers is known as a heat exchanger used in an air conditioner (for example, see Patent Document 1 below). The flat tubes are inserted into the fins with a gap between them in the vertical direction. Each flat tube has a plurality of flow passages spaced apart in the width direction. The fins are spaced apart in the direction in which the flat tubes extend.

[0003] The pair of headers each extend in the vertical direction. One header is connected to the flat tubes while accommodating one end of each of the flat tubes. The other header is connected to the flat tubes while accommodating the other end of each of the flat tubes.

[0004] A partition plate is provided within the header to divide the internal space into two. An inlet pipe is also provided within the header to supply refrigerant to the header. The refrigerant ejected from the inlet pipe flows into the space on the opposite side of the partition plate through a communication hole provided in the lower part of the partition plate, and is distributed to each of the flat tubes. Conventionally, the shape of the communication hole has generally been rectangular. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] International Publication No. 2019 / 078066 Summary of the Invention [Problem to be solved by the invention]

[0006] However, when the communication hole has a simple rectangular shape as described above, the refrigerant ejected from the inlet pipe may flow back through the corners of the communication hole, which may result in a problem that the refrigerant cannot be smoothly supplied to the flat tubes.

[0007] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a heat exchanger, a heat exchanger unit, and a refrigeration cycle device that are capable of operating stably by supplying refrigerant to flat tubes more smoothly. [Means for solving the problem]

[0008] In order to solve the above problems, the heat exchanger of the present disclosure comprises a plurality of flat tubes each having a flat plate shape, with a flow path formed therein, and arranged at intervals in the vertical direction, a header that communicates with each of the plurality of flat tubes to supply a refrigerant to the flow path, and an inlet pipe that guides the refrigerant into the inside of the header, the header having a header body having a space therein through which the refrigerant flows, and a partition plate extending in the vertical direction to divide the space in the header body into a first space on the flat tube side and a second space on the opposite side to the first space, a communication hole is formed in the lower end of the partition plate connecting the first space and the second space, and the heat exchanger further has a pair of baffles provided on both widthwise sides of the communication hole to reduce the opening area of ​​the communication hole.

[0009] A heat exchanger unit according to the present disclosure includes the above-described heat exchanger and a blower that sends air to the heat exchanger.

[0010] A refrigeration cycle device according to the present disclosure includes the above-described heat exchanger unit. Effect of the Invention

[0011] According to the present disclosure, it is possible to provide a heat exchanger, a heat exchanger unit, and a refrigeration cycle apparatus that are capable of stably operating by more smoothly supplying refrigerant to flat tubes. [Brief description of the drawings]

[0012] [Figure 1] 1 is a circuit diagram showing a configuration of a refrigeration cycle device according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a diagram illustrating a configuration of a heat exchanger unit according to an embodiment of the present disclosure. [Diagram 3] FIG. 2 is a perspective view showing a configuration of a flat tube according to an embodiment of the present disclosure. [Figure 4] FIG. 2 is a cross-sectional view showing a configuration of a header according to an embodiment of the present disclosure. [Diagram 5] 4A to 4C are diagrams illustrating the configuration of a partition plate and a communication hole according to an embodiment of the present disclosure. [Figure 6] 13A and 13B are diagrams illustrating a partition plate and a first modified example of a communication hole according to an embodiment of the present disclosure. [Figure 7] 13A and 13B are diagrams illustrating a partition plate and a second modified example of a communication hole according to an embodiment of the present disclosure. [Figure 8] FIG. 11 is a cross-sectional view illustrating a modified example of an inlet pipe according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The overall configuration of a refrigeration cycle device 10 of the first embodiment will be described with reference to Fig. 1. In Fig. 1, solid arrows indicate the direction in which the refrigerant flows during heating operation, and dotted arrows indicate the direction in which the refrigerant flows during cooling operation. (Overall configuration of the refrigeration cycle device) The refrigeration cycle apparatus 10 includes a four-way valve 15, a compressor 16, a first heat exchanger unit 18, an expansion valve 19, and a second heat exchanger unit 23, which are connected by a refrigerant piping 14. The refrigeration cycle apparatus 10 includes an outdoor unit 11 and an indoor unit 12.

[0014] (Overall configuration of outdoor unit) The outdoor unit 11 has a four-way valve 15, a compressor 16, a first heat exchanger unit 18, and an expansion valve 19.

[0015] (Four-way valve configuration) Four-way valve 15 has connection parts 15A to 15D to which one of both ends of first and second refrigerant pipes 14A, 14B constituting refrigerant pipe 14 is connected. One end of first refrigerant pipe 14A is connected to connection part 15A, and the other end of first refrigerant pipe 14A is connected to connection part 15B. One end of second refrigerant pipe 14B is connected to connection part 15C, and the other end of second refrigerant pipe 14B is connected to connection part 15D.

[0016] The four-way valve 15 configured as described above switches the direction in which the refrigerant flows between heating operation and cooling operation. Specifically, during cooling operation, the refrigerant is circulated through the compressor 16, the first heat exchanger unit 18, the expansion valve 19, and the second heat exchanger unit 23 in this order. On the other hand, during heating operation, the refrigerant is circulated through the compressor 16, the second heat exchanger unit 23, the expansion valve 19, and the first heat exchanger unit 18 in this order.

[0017] (Compressor configuration) The compressor 16 is provided in the second refrigerant pipe 14B. The compressor 16 compresses the refrigerant flowing through the second refrigerant pipe 14B.

[0018] (Configuration of the first heat exchanger unit) The first heat exchanger unit 18 includes a first blower 26 and a heat exchanger 27 .

[0019] (Configuration of the first fan) The first blower 26 supplies air to the heat exchanger 27 .

[0020] (Overall structure of heat exchanger) The heat exchanger 27 will be described with reference to FIGS.

[0021] During cooling operation, the heat exchanger 27 is used as a condenser and dissipates heat to the outside, and during heating operation, the heat exchanger 27 is used as an evaporator and absorbs heat from the outside. The heat exchanger 27 is provided in the first refrigerant pipe 14A located between the four-way valve 15 and the expansion valve 19. The heat exchanger 27 has a plurality of flat tubes 41, a plurality of fins 42, and a pair of headers 43.

[0022] (Flat tube configuration) Next, the flat tube 41 will be described with reference to Fig. 2 and Fig. 3. The flat tube 41 is a heat transfer tube having a flat outer shape. The flat tube 41 extends in the X direction. Inside the flat tube 41, a plurality of flow paths 41A through which a refrigerant flows are formed at intervals in the Y direction. The flat tubes 41 include a flat tube 41F arranged at the bottom and a flat tube 41S arranged second from the bottom.

[0023] The flat tube 41 has a pair of end portions 41B, 41C arranged in the X direction. One end portion 41B is housed in one header 43. The other end portion 41C is housed in the other header 43. The multiple flat tubes 41 are arranged at intervals in the Z direction, and are supported on both sides in the X direction by the pair of headers 43.

[0024] (Fin configuration) Next, the fins 42 will be described with reference to FIG. The multiple fins 42 each have a flat tube insertion portion 42A formed at intervals in the Z direction. The flat tubes 41 are inserted into the flat tube insertion portion 42A.

[0025] (Header structure) Next, the configuration of the pair of headers 43 will be described with reference to Fig. 2 and Fig. 4. As an example, the pair of headers are arranged to face each other in the X direction. One header 43 is connected to the flat tubes 41 such that one end 41B of each of the flat tubes 41 is arranged on the inside. The other header 43 is connected to the flat tubes 41 such that the other end 41C of each of the flat tubes 41 is arranged on the inside.

[0026] Here, the configuration of the header 43 on the evaporator inlet side out of the pair of headers 43 will be described. The header 43 includes a header body 45, a partition plate 47, and a nozzle portion 49 (inlet pipe).

[0027] (Header body structure) The header body 45 is a cylindrical member extending in the Z direction with the top and bottom ends closed. The header body 45 defines a columnar internal space 53 inside. The header body 45 has an opening 45A and a bottom surface 45a. The opening 45A is formed in a side wall of the header body 45. The tip of the first refrigerant pipe 14A is inserted into the opening 45A. The opening 45A is formed at a position facing the nozzle portion 49 in the X direction.

[0028] The bottom surface 45a has a first bottom surface 45aa, a second bottom surface 45ab, and a third bottom surface 45ac. The first bottom surface 45aa is a surface that defines the lower end of the second space 54. The second bottom surface 45ab is a surface that defines the lower end of the first space 55. The third bottom surface 45ac is disposed between the first bottom surface 45aa and the second bottom surface 45ab, which are disposed in the X direction. The third bottom surface 45ac is connected to the first bottom surface 45aa and the second bottom surface 45ab.

[0029] (Partition plate configuration) Next, the partition plate 47 will be described with reference to FIGS. The partition plate 47 is disposed in the header body 45 while extending in the Z direction. Both ends of the partition plate 47 disposed in the Y direction are connected to the header body 45. The partition plate 47 divides the internal space 53 into a second space 54 and a first space 55 arranged in the X direction, with the refrigerant being able to flow through the upper and lower ends of the internal space 53. The second space 54 is arranged on the side to which the first refrigerant pipe 14A is connected. The first space 55 is arranged on the side to which the multiple flat tubes 41 are connected. The partition plate 47 forms a circulation path for the refrigerant.

[0030] The partition plate 47 has an upper end surface 47a, a first surface 47b, a second surface 47c, and a communication hole 47C.

[0031] The upper end surface 47a is disposed at a position spaced downward from the header body 45 facing the upper end surface 47a in the Z direction. The refrigerant moves between the second space 54 and the first space 55 through an opening formed between the header body 45 facing the upper end surface 47a and the upper end surface 47a.

[0032] The first surface 47b is a plane perpendicular to the X direction, and defines the other side of the second space 54 in the X direction. The second surface 47c is a surface disposed on the opposite side to the first surface 47b. The second surface 47c is a plane perpendicular to the X direction, and defines one side of the first space 55 in the X direction.

[0033] The nozzle portion 49 is disposed in the second space 54. A refrigerant flow portion 54A through which the refrigerant passes is formed on each of both sides in the Y direction of the nozzle portion 49. The refrigerant flow portion 54A is configured as a part of the second space 54.

[0034] The nozzle portion 49 has an injection hole 49A arranged on the lower end side. The injection hole 49A is circular when viewed from the Z direction. When the heat exchanger 27 is operated as an evaporator, a refrigerant (a two-phase gas-liquid refrigerant) is supplied into the nozzle portion 49 through the first refrigerant pipe 14A. The injection hole 49A blows out the refrigerant in a direction toward the first bottom surface 45aa, thereby causing the refrigerant to collide with the first bottom surface 45aa and reducing the difference in the state of the refrigerant in the Y direction. After colliding with the first bottom surface 45aa, the refrigerant flows through the communication hole 47C to the lower part of the first space 55, and then flows in a direction toward the upper end of the first space 55, and is guided into the multiple flow paths 41A formed in each flat tube 41. The refrigerant that has moved to the upper end of the first space 55 flows to the upper end of the second space 54, and then flows in a direction toward the first bottom surface 45aa.

[0035] When the heat exchanger 27 is operated as a condenser, the refrigerant flowing from the flat tubes 41 into the first space 55 flows into the first refrigerant pipe 14A via the injection holes 49A.

[0036] The communication hole 47C is shaped like a rectangle with its longitudinal direction aligned in the horizontal direction. The refrigerant moves between the second space 54 and the first space 55 through the communication hole 47C.

[0037] A baffle plate 50 is provided at each of the upper corners on both sides in the width direction (longitudinal direction) of the communication hole 47C. Each baffle plate 50 has a rectangular shape when viewed horizontally. The width dimensions of the baffle plates 50 are equal to each other. The pair of baffles are arranged symmetrically with respect to the XZ plane passing through the nozzle portion 49 arranged at the center in the width direction. The lower edge of the baffle plate 50 is spaced upward from the lower edge of the communication hole 47C. This blocks a part of the communication hole 47C. Therefore, the opening shape of the communication hole 47C is T-shaped. This is to prevent the refrigerant sprayed from the nozzle portion 49 from flowing back to the second space 54 side through the upper corners of the communication hole 47C.

[0038] (Action and effect) As described above, the header 43 is provided with a partition plate 47 that divides the internal space into two. The header 43 is also provided with an inflow pipe (nozzle portion 49) for supplying the refrigerant to the header. The refrigerant ejected from the inflow pipe flows into the space on the opposite side of the partition plate 47 through a communication hole 47C provided at the lower part of the partition plate 47, and is distributed to each flat tube 41. Conventionally, the shape of the communication hole 47C has generally been rectangular. However, when the communication hole 47C is a simple rectangle, there is a possibility that the refrigerant ejected from the inflow pipe (nozzle portion 49) may flow back to the second space 54 side through the corner area of ​​the communication hole 47C. Therefore, there was a problem that the refrigerant could not be smoothly supplied to the flat tube 41. Therefore, in this embodiment, the above-mentioned configurations are adopted.

[0039] According to the above configuration, since both sides in the width direction of the communication hole 47C are blocked by the baffle plate 50, it is possible to reduce the possibility that the refrigerant that once flows out into the first space 55 will flow back into the second space 54 through the corners of the communication hole 47C, etc. This makes it possible to stably and efficiently supply the refrigerant to each of the flat tubes 41, thereby improving the performance of the heat exchanger.

[0040] Here, the refrigerant flowing out of the inlet pipe (nozzle portion 49) is sprayed downward. Therefore, there is little possibility of backflow occurring at the lower portion of the communication hole 47C. With the above configuration, the area where backflow is unlikely to occur is made the opening, and the baffle plate 50 is provided in the area where backflow is likely to occur, so that the flow field of the refrigerant can be further stabilized. This makes it possible to stably and efficiently supply the refrigerant to each flat tube 41, thereby improving the performance of the heat exchanger.

[0041] According to the above configuration, the dimensions of the pair of baffles 50 are made equal to each other in accordance with the position of the inlet pipe (nozzle portion 49). This makes it possible to form a flow field that is plane-symmetrical with respect to the XZ plane that passes through the nozzle portion 49. This makes it possible to stably and efficiently supply the refrigerant to each of the flat tubes 41, thereby improving the performance of the heat exchanger.

[0042] (Other embodiments) Although the embodiments of the present disclosure have been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes and the like that do not depart from the gist of the present disclosure are also included.

[0043] For example, as a first modified example, the baffle plates 50 may each have a triangular shape as shown in Fig. 6. Specifically, the baffle plates 50 have a width dimension that gradually increases from the bottom to the top.

[0044] Here, the refrigerant flow field forms an elliptical shape with the inlet pipe (nozzle portion 49) as the center. Therefore, by forming the baffle plate 50 in a triangular shape as described above, it is possible to reduce the possibility of obstructing the flow of the refrigerant other than the backflow component. This makes it possible to stably and efficiently supply the refrigerant to each flat tube 41, thereby improving the performance of the heat exchanger.

[0045] Furthermore, as a second modified example, as shown in FIG. 7, the inlet pipe (nozzle portion 49) may be positioned offset to one side in the width direction of the communicating hole 47C, and the width dimension of one of the pair of baffle plates 50 may be smaller than the width dimension of the other baffle plate 50.

[0046] According to the above configuration, the dimensions of the pair of baffles 50 are different from each other in accordance with the position of the inflow pipe (nozzle portion 49). This allows the opening shape of the communication hole 47C to be formed in accordance with the flow field of the refrigerant with reference to the nozzle portion 49. This makes it possible to stably and efficiently supply the refrigerant to each flat tube 41, thereby improving the performance of the heat exchanger.

[0047] Furthermore, as a modified example of the inflow pipe (nozzle portion 49), the configuration shown in Fig. 8 can also be adopted. In this example, the injection direction of the injection hole 49A of the nozzle portion 49 extends downward from the second space 54 side toward the first space 55 side. Furthermore, a guide portion 60 is provided in a region of the header body 45 facing the injection hole 49A. The guide portion 60 has an inclined surface 61 that extends downward from the second space 54 side toward the first space 55 side to guide the refrigerant toward the communication hole.

[0048] According to the above configuration, the refrigerant injected from the injection hole 49A is guided along the inclined surface 61 of the guide portion 60, and flows downward from the second space 54 side to the first space 55 side. This stabilizes the flow of the refrigerant, and further reduces the possibility of the refrigerant flowing back between the first space 55 and the second space 54. This makes it possible to stably and efficiently supply the refrigerant to each flat tube 41, and improves the performance of the heat exchanger.

[0049] <Additional Notes> The heat exchanger 27, the heat exchanger unit 18, and the refrigeration cycle apparatus 10 described in each embodiment can be understood, for example, as follows.

[0050] (1) A heat exchanger 27 according to a first embodiment has a flat plate shape, includes a plurality of flat tubes 41 formed therein and arranged at intervals in the vertical direction, a header 43 that communicates with each of the plurality of flat tubes 41 to supply a refrigerant to the flow path, and an inlet pipe (nozzle portion 49) that guides the refrigerant into the header 43. The header 43 has a header body 45 having a space therein through which the refrigerant flows, and a partition plate 47 extending in the vertical direction to divide the space in the header body 45 into a first space 55 on the flat tube 41 side and a second space 54 on the opposite side to the first space 55. A communication hole 47C that communicates between the first space 55 and the second space 54 is formed in a lower end of the partition plate 47, and the partition plate 47 further has a pair of baffle plates 50 provided on both widthwise sides of the communication hole 47C to reduce the opening area of ​​the communication hole 47C.

[0051] According to the above configuration, since both widthwise sides of the communication hole 47C are blocked by the baffle plate 50, it is possible to reduce the possibility that the refrigerant, once flowing out into the first space 55, will flow back into the second space 54 through a corner or the like of the communication hole 47C.

[0052] (2) A heat exchanger 27 according to a second aspect is the heat exchanger 27 of (1), wherein the baffle plate 50 is rectangular when viewed from the direction in which the inlet pipe extends, and the lower edge of the baffle plate 50 is spaced upward from the lower edge of the communicating hole 47C.

[0053] The refrigerant flowing out of the inlet pipe (nozzle portion 49) is sprayed downward. Therefore, there is little possibility of backflow occurring at the lower portion of the communication hole 47C. With the above-described configuration, the area where backflow is unlikely to occur is made the opening, and the baffle plate is provided in the area where backflow is likely to occur, so that the flow field of the refrigerant can be further stabilized.

[0054] (3) A heat exchanger 27 according to a third aspect is the heat exchanger 27 of (1), wherein the baffle plate 50 has a width dimension that increases from bottom to top when viewed in the direction in which the inlet pipe extends.

[0055] Here, the flow field of the refrigerant forms an elliptical shape with the inlet pipe (nozzle portion 49) as the center. Therefore, by forming the baffle plate 50 in the triangular shape as described above, it is possible to reduce the possibility that the flow of the refrigerant other than the backflow component is obstructed.

[0056] (4) A heat exchanger 27 according to a fourth aspect is a heat exchanger 27 according to any one of the aspects (1) to (3), wherein the inlet pipe is provided in the center of the communication hole 47C in the width direction, and the width directions of the pair of baffles 50 are equal to each other.

[0057] According to the above configuration, the dimensions of the pair of baffles 50 are made equal to each other in accordance with the position of the inflow pipe (nozzle portion 49). This makes it possible to form a flow field that is plane-symmetrical with respect to the XZ plane that passes through the nozzle portion 49.

[0058] (5) A heat exchanger 27 according to a fifth aspect is a heat exchanger 27 according to any one of the aspects (1) to (3), wherein the inlet pipe is positioned biased to one side in the width direction of the communicating hole 47C, and the width dimension of the baffle plate 50 on one side of the pair of baffles 50 is smaller than the width dimension of the baffle plate 50 on the other side.

[0059] According to the above configuration, the pair of baffle plates 50 have different dimensions in accordance with the position of the inflow pipe (nozzle portion 49). This makes it possible to form the opening shape of communication hole 47C in accordance with the flow field of the refrigerant with reference to nozzle portion 49.

[0060] (6) A heat exchanger 27 according to a sixth aspect is a heat exchanger 27 according to any one of the aspects (1) to (5), wherein the inflow pipe has an injection hole 49A for spraying the refrigerant into the second space 54, the injection direction of the injection hole 49A extends downward from the second space 54 side toward the first space 55 side, and a guide portion 60 having an inclined surface 61 is provided in an area of ​​the header body 45 opposite the injection hole 49A, the inclined surface 61 extending downward from the second space 54 side toward the first space 55 side to guide the refrigerant toward the communication hole 47C.

[0061] According to the above configuration, the refrigerant injected from the injection hole 49A is guided along the inclined surface 61 of the guide portion 60, and flows downward from the second space 54 side to the first space 55 side. This stabilizes the flow of the refrigerant, and further reduces the possibility of the refrigerant flowing backward between the first space 55 and the second space 54.

[0062] (7) A heat exchanger unit 18 according to a seventh aspect includes a heat exchanger 27 according to any one of the aspects (1) to (6) and a blower 26 that sends air to the heat exchanger 27.

[0063] According to the above-described configuration, the refrigerant can be stably introduced into the flat tubes 41, so that it is possible to provide the heat exchanger unit 18 that operates more efficiently.

[0064] (8) A refrigeration cycle apparatus 10 according to an eighth aspect includes the heat exchanger unit 18 of (7).

[0065] According to the above configuration, it is possible to provide the refrigeration cycle device 10 capable of operating more stably. [Explanation of symbols]

[0066] 10...Refrigeration cycle device 11…Outdoor unit 12...Indoor unit 14…Refrigerant piping 14A…First refrigerant pipe 14B…Second refrigerant piping 15...Four-way valve 15A~15D…Connections 16…Compressor 18...First heat exchanger unit 19…Expansion valve 23...Second heat exchanger unit 26…First blower 27...Heat exchanger 32…Second blower 35…Entrance / Exit Header 37…Fold-over header 41...Flat tube 45…Header body 47…Partition plate 47C…Communication hole 49…Nozzle section 49A…Injection hole 50…Baffle plate 60…Information department 61…Slope surface

Claims

1. a plurality of flat tubes each having a flat plate shape, each having a flow path formed therein, and arranged at intervals in the vertical direction; a header that communicates with each of the plurality of flat tubes to supply a refrigerant to the flow path; an inlet pipe for introducing a refrigerant into the header; Equipped with The header a header body having a space therein through which a refrigerant flows; A partition plate extends in the vertical direction to divide the space in the header body into a first space on the flat tube side and a second space on the opposite side of the first space, and a communication hole is formed at the lower end of the partition plate to communicate between the first space and the second space. a pair of baffle plates are provided on both sides of the communication hole in the width direction to reduce the opening area of ​​the communication hole, The baffle plate has a width that increases from bottom to top when viewed from the direction in which the inlet pipe extends.

2. 2. The heat exchanger according to claim 1, wherein the inlet pipe is provided at a central portion in a width direction of the communication hole, and the width dimensions of the pair of baffles are equal to each other.

3. 2. The heat exchanger according to claim 1, wherein the inflow pipe is arranged biased to one side in a width direction of the communication hole, and a dimension of the baffle plate on one side in the width direction of the pair of baffles is smaller than a dimension of the baffle plate on the other side in the width direction.

4. A flat plate-shaped tube having a flow path formed therein and arranged at intervals in the vertical direction; a header that communicates with each of the plurality of flat tubes to supply a refrigerant to the flow path; an inlet pipe for introducing a refrigerant into the header; Equipped with The header a header body having a space therein through which a refrigerant flows; A partition plate extends in the vertical direction to divide the space in the header body into a first space on the flat tube side and a second space on the opposite side of the first space, and a communication hole is formed at the lower end of the partition plate to communicate between the first space and the second space. a pair of baffle plates are provided on both sides of the communication hole in the width direction to reduce the opening area of ​​the communication hole, the inflow pipe is arranged biased to one side in the width direction of the communication hole, and one of the pair of baffles has a smaller dimension in the width direction than the other baffle.

5. 5. The heat exchanger according to claim 4, wherein the baffle plate has a rectangular shape when viewed from the direction in which the inlet pipe extends, and a lower edge of the baffle plate is spaced upward from a lower edge of the communicating hole.

6. the inlet pipe has an injection hole for injecting the refrigerant into the second space, The injection direction of the injection hole extends downward from the second space side toward the first space side, 6. The heat exchanger according to claim 1, wherein a guide portion having an inclined surface that extends downward from the second space side toward the first space side and thereby guides the refrigerant toward the communication hole is provided in a region of the header body facing the injection hole.

7. A heat exchanger according to any one of claims 1 to 5; a blower for sending air to the heat exchanger; A heat exchanger unit comprising:

8. A refrigeration cycle device comprising the heat exchanger unit according to claim 7.

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