WO2021075334A1

WO2021075334A1 - Heat exchanger

Info

Publication number: WO2021075334A1
Application number: PCT/JP2020/038071
Authority: WO
Inventors: 健二名越; 拓也奥村; 憲昭山本
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2019-10-17
Filing date: 2020-10-08
Publication date: 2021-04-22
Also published as: CN113424009A; JP7365634B2; EP4047298A4; JP2021063637A; EP4047298A1; CN113424009B

Abstract

In a heat exchanger in which a second fluid (B) is caused to flow between each layer in a plate fin laminate (2) and heat is exchanged between the second fluid (B) and a first fluid (A) flowing through a plate fin flow path (13), the plate fins (2a) include: a header opening (11a) into which the first fluid is supplied from a supply pipe; header flow paths (11) formed around the header opening (11a); a header flow path opening (8) that connects the header opening (11a) and the header flow paths (11); and a plate fin flow path (13) into which the first fluid from the header flow paths (11) flows and exchanges heat with the second fluid. The internal circumference side of the header flow paths (11) are continuously joined in the lamination direction of in the plate fin laminate (2).

Description

Heat exchanger

The present disclosure relates to a heat exchanger, and more particularly to a heat exchanger of a laminated plate fin configured by laminating plate-shaped plate fins through which a refrigerant flows.

Heat exchangers used to exchange thermal energy between fluids with different thermal energies are used in many devices. In particular, heat exchangers of laminated plate fins are widely used in, for example, air conditioners for homes and vehicles, computers, and various electric devices.

The heat exchanger of the laminated plate fins exchanges heat between the fluid (refrigerant) flowing through the flow path formed in the plate-shaped plate fins and the fluid (air) flowing between the laminated plate fins. It is a form to do.

In the field of heat exchangers for laminated plate fins as described above, various configurations have been proposed for the purpose of weight reduction, miniaturization, and efficiency of heat exchange (see, for example, Patent Document 1 and Patent Document 2). ).

Japanese Patent No. 3965901 Utility Model Registration No. 3192719 Japanese Patent No. 6504367

In the field of heat exchangers for laminated plate fins, the plate fins are made of a material having high thermal conductivity to reduce the thickness for the purpose of weight reduction, miniaturization, and efficiency of heat exchange, and are provided on the plate fins. It is being studied to flow a fluid (hydrogen) having a higher pressure than a conventional heat exchanger in the flow path.

In the heat exchanger of the laminated plate fin, in the configuration in which the high-pressure refrigerant flows through the flow path provided in the plate fin, the flow path is deformed and the flow rate and the flow velocity of the refrigerant vary, so that the heat exchanger can be used as a heat exchanger. There was a risk that the performance of the In a heat exchanger configured by stacking a plurality of such plate fins, rigidity is provided on both ends in the stacking direction in order to prevent deformation and distortion in the stacking direction due to the flow of refrigerant in the flow path. A tall and thick metal member was provided as an end plate (see Patent Document 3). Such end plates are brazed together with laminated plate fins. However, such an end plate has a problem that the heat capacity is significantly different from that of the plate fins to be joined, and brazing defects are likely to occur due to the difference in member strength. Therefore, the conventional heat exchanger of the laminated plate fin configured as described above has problems in weight reduction and miniaturization, and also has problems in pressure resistance and reliability with respect to the supplied refrigerant. there were.

The present disclosure has a configuration capable of achieving weight reduction, miniaturization, and efficiency of heat exchange, and ensuring pressure resistance as a heat exchanger, so that a high-pressure refrigerant can flow through a flow path. The purpose is to provide a highly reliable heat exchanger.

The heat exchanger of one aspect of the present disclosure is
A plate fin laminate in which plate fins having a flow path through which the first fluid flows are laminated, and
A supply / discharge pipe for supplying or discharging a first fluid flowing through the flow path of the plate fins of each layer in the plate fin laminate is provided.
A heat exchanger in which a second fluid is passed through the gaps between the layers of the plate fin laminate to exchange heat between the first fluid and the second fluid flowing through the flow path of the plate fins.
Plate fins
When the supply / discharge pipe functions as a supply / discharge pipe, a header opening into which the first fluid from the supply / discharge pipe is supplied and
The header flow path formed around the header opening,
Includes a plate fin flow path through which the first fluid flows from the header flow path and exchanges heat with the second fluid.
The plate fin laminate has a configuration in which the inner peripheral side of the header flow path is continuously joined in the stacking direction.

FIG. 1 is a perspective view showing the appearance of the laminated plate fin heat exchanger of the first embodiment according to the present disclosure. FIG. 2A is a plan view showing the first fin member of the plate fin according to the first embodiment. FIG. 2B is a plan view showing a second fin member of the plate fin according to the first embodiment. FIG. 3 is an exploded perspective view showing a state in which the plate fins of the first embodiment are laminated. FIG. 4 is a perspective view showing a part of the plate fin laminate according to the first embodiment. FIG. 5 is a perspective view showing the vicinity of the header flow path in the plate fin laminate according to the first embodiment. FIG. 6 is a perspective view showing a cross section of the plate fin laminate according to the first embodiment cut by the VI-VI line shown in FIG. 2A. FIG. 7 is a cross-sectional view showing the vicinity of the header opening of the plate fin laminate sandwiched by the end plates. FIG. 8 is a vertical cross-sectional view showing a cut surface in the longitudinal direction orthogonal to the cut surface of the vertical cross-sectional view shown in FIG. 7. FIG. 9 is a vertical cross-sectional view showing the first fin member in FIG. 7. FIG. 10 is a vertical cross-sectional view showing the second fin member in FIG. 7. FIG. 11 is a vertical cross-sectional view showing the first fin member in FIG. FIG. 12 is a vertical cross-sectional view showing the second fin member in FIG. FIG. 13 is a perspective view showing a vertical cross section of the plate fin laminate according to the first embodiment cut along the longitudinal direction. FIG. 14 is an end view of the plate fin laminate according to the first embodiment cut along the longitudinal direction. FIG. 15 is a perspective view showing a vertical cross section of the plate fin laminate according to the first embodiment. FIG. 16 is an end view of the plate fin laminate showing the vertical cross section of FIG. FIG. 17 is an exploded perspective view showing a first fin member in contact with the second end plate and plate fins laminated on the first fin member in the configuration of the first embodiment. FIG. 18 is an exploded perspective view showing a second fin member in contact with the first end plate and plate fins laminated under the second fin member in the configuration of the first embodiment. FIG. 19 is a vertical cross-sectional view schematically showing a modified example of the configuration of the first embodiment. FIG. 20 is a perspective view showing a plate fin laminate in the heat exchanger of the second embodiment according to the present disclosure. FIG. 21 is a cross-sectional view of a region where a header flow path is formed in the plate fin laminate according to the second embodiment.

The heat exchanger of one aspect according to the present disclosure is
A plate fin laminate in which plate fins having a flow path through which the first fluid flows are laminated, and
A supply / discharge pipe for supplying or discharging a first fluid flowing through the flow path of the plate fins of each layer in the plate fin laminate is provided.
A heat exchanger in which a second fluid is passed through the gaps between the layers of the plate fin laminate to exchange heat between the first fluid and the second fluid flowing through the flow path of the plate fins.
Plate fins
When the supply / discharge pipe functions as a supply / discharge pipe, a header opening into which the first fluid from the supply / discharge pipe is supplied and
The header flow path formed around the header opening,
Includes a plate fin flow path through which the first fluid flows from the header flow path and exchanges heat with the second fluid.
The plate fin laminate has a configuration in which the inner peripheral side of the header flow path is continuously joined in the stacking direction.

Note that the outer peripheral side of the header flow path may be continuously joined in the stacking direction.

The inner peripheral side of the header flow path may be composed of a wall surface continuous in the stacking direction.

In the plate fin laminated body, the inner peripheral side of the header flow path may be composed of a wall surface having a double structure.

In the plate fin, the header flow path port that communicates the header opening and the header flow path may be arranged on the inner peripheral side of the header flow path.

Note that the plate fins may have a configuration in which a plurality of header flow path ports that communicate the header opening and the header flow path are arranged on the inner peripheral side of the header flow path.

The header flow path port may be formed at an opposite position on the inner peripheral side of the header flow path.

Note that the header flow path port may be formed at an opposite position on the center line extending in the longitudinal direction in the plate fin.

The plate fin has a structure in which the first fin member and the second fin member are joined to form a flow path.
The first fin member has a recess for forming a header flow path and has a recess.
The second fin member may be joined to the first fin member and may have a flat surface for forming a recess in the first fin member in the header flow path.

In the first fin member, the recess for forming the header flow path has a header flow path inner peripheral support portion, a header flow path top portion, and a header flow path outer peripheral support portion.
The header flow path inner peripheral support portion and the header flow path outer peripheral support portion are joined to the flat surface of the second fin member to form the header flow path.
A header flow path port for communicating the header opening and the header flow path may be formed in a part of the header flow path inner peripheral support portion.

The second fin member has a flat surface and an inner peripheral support portion that bends and continues to the flat surface and serves as an outer edge portion of the header opening on the inner peripheral side of the header flow path.
Even if the inner peripheral support portion of the second fin member is joined to the first fin member in another plate fin adjacent in the stacking direction, the inner peripheral side of the header flow path in the plate fin laminated body has a double wall surface. Good.

Hereinafter, as an embodiment of the heat exchanger of the present disclosure, a laminated plate fin heat exchanger will be described with reference to the attached drawings. The heat exchanger of the present disclosure is not limited to the configuration of the laminated plate fin heat exchanger described in the following embodiments, and has the same configuration as the technical idea described in the following embodiments. It includes a heat exchanger having the above. The embodiments described below are examples of the present invention, and the configurations, functions, operations, and the like shown in the embodiments are examples and do not limit the present disclosure. Among the components in the following embodiments, the components not described in the independent claims indicating the highest level concept are described as arbitrary components.

(Embodiment 1)
FIG. 1 is a perspective view showing the appearance of the laminated plate fin heat exchanger (hereinafter, simply referred to as a heat exchanger) 1 of the first embodiment. As shown in FIG. 1, in the heat exchanger 1 of the first embodiment, a supply pipe 4 to which a refrigerant as a first fluid A is supplied and a plurality of rectangular plate-shaped plate fins 2a are laminated. It includes a configured plate fin laminate 2 and a discharge pipe 5 for discharging a refrigerant flowing through a flow path formed in the plate fin 2a.

In the heat exchanger 1 of the first embodiment, the supply pipe 4 and the discharge pipe 5 have substantially the same configuration, and a function corresponding to the operation at that time is used as a name. In the present disclosure, the supply / discharge pipe 4 and the discharge pipe 5 are collectively referred to as a supply / discharge pipe (4, 5).

End plates 3 (3a, 3b) are arranged at both ends of the plate fin laminate 2 in the stacking direction, and the end plates 3 (3a, 3b) have substantially the same shape as the rectangular plate fins 2a in a plan view. .. A supply pipe 4 or a discharge pipe 5 is joined to both ends of one end plate 3 (3a) in the longitudinal direction. In the configuration of the first embodiment, the supply pipe 4 or the discharge pipe 5 is joined to both ends of one of the end plates 3 (3a). Depending on the configuration, the supply pipe 4 may be joined to one end plate 3 (3a), and the discharge pipe 5 may be joined to the other end plate 3 (3b).

In the following embodiment, the stacking direction of the plate fin laminate 2 in the heat exchanger 1 shown in FIG. 1 is the vertical direction, and one end plate 3 (3a) provided on the plate fin laminate 2 is provided. The position will be described as the upper side, and the position of the other end plate 3 (3b) as the lower side. However, when the heat exchanger 1 is provided in an apparatus (for example, an air conditioner), the stacking direction is not specified in the vertical direction (vertical direction).

The end plates 3 (3a, 3b) arranged at both ends of the plate fin laminated body 2 in the laminating direction are fixed to each other at predetermined intervals by positioning means (for example, positioning bolts), and the plate fins are laminated. Body 2 is sandwiched. The positioning means for maintaining and fixing the end plates 3 (3a, 3b) at both ends at predetermined intervals has a positioning function for each of the stacked plate fins 2a. The end plate 3 is made of a plate material made of a metal material such as aluminum, an aluminum alloy, or stainless steel.

The heat exchanger 1 of the first embodiment has a configuration in which the refrigerant, which is the first fluid A, flows through the flow path (plate fin flow path 13) formed in each plate fin 2a of the plate fin laminate 2. On the other hand, the air, which is the second fluid B, has a configuration that passes through the gap formed between the stacks of the plate fins 2a in the plate fin laminate 2. In the heat exchanger 1 configured in this way, heat exchange is performed between the first fluid A and the second fluid B in the plate fin laminated body 2.

Each of the plurality of plate fins 2a constituting the plate fin laminate 2 in the heat exchanger 1 of the first embodiment faces the first fin member 10 which is two plate materials and the second fin member 20. The structure is such that a flow path is formed by laminating and joining (brazing). The plate fins 2a configured in this way are joined (brazed) by being pressurized and heated in a state where a plurality of the plate fins 2a are laminated to form the plate fin laminate 2.

2A and 2B are plan views showing the first fin member 10 and the second fin member 20 constituting the plate fin 2a, respectively. FIG. 2A is a plan view of the first fin member 10, and FIG. 2B is a plan view of the second fin member 20. The first fin member 10 and the second fin member 20 are made of a metal plate material such as aluminum, aluminum alloy, or stainless steel, and have at least a brazing material layer in the core material of the metal plate material. Further, the first fin member 10 and the second fin member 20 are processed into a predetermined shape by using, for example, a thin plate material having a thickness of 0.2 mm. The first fin member 10 and the second fin member 20 processed into a predetermined shape are pressed and heated so as to be in close contact with each other at a predetermined position, so that the flat predetermined regions facing each other are surely joined to each other (brazing). Is attached).

The first fin member 10 shown in FIG. 2A has recesses formed on both ends in the longitudinal direction for the annular header flow path 11 to which the refrigerant is supplied from the supply pipe 4 or the refrigerant is discharged to the discharge pipe 5. Has been done. In FIG. 2A, the header flow path 11 in the first fin member 10 is formed by an annular recess having a structure protruding toward the front side of the paper surface. A header communication flow path 12 that leads out by a predetermined distance is formed from one place on the outer peripheral portion of the header flow path 11. An end portion of the plate fin flow path 13 formed in the heat exchange region C (see FIG. 5 described later) in the plate fin 2a is arranged on an extension line in the lead-out direction of the header communication flow path 12.

In the first fin member 10, the plate fin flow path 13 formed on the extension line in the lead-out direction of the header communication flow path 12 is formed by a recess like the header communication flow path 12. The plate fin flow path 13 is formed so as to meander the entire heat exchange region C of the plate fin 2a. The plate fin flow path 13 includes a first plate fin flow path 13a formed of a linear recess and a second plate fin flow path 13b formed of an arc-shaped recess. In the configuration of the first embodiment, a plurality of (for example, three) linear first plate fin flow paths 13a extend in parallel in the longitudinal direction in the heat exchange region C of the plate fins 2a. A meandering-shaped flow path is formed by connecting the arc-shaped second plate fin flow path 13b between the ends thereof. Further, as the heat exchange region C in the plate fin 2a, a region other than the header region in which the header flow path 11 is formed is shown.

As described above, header flow paths 11 communicating with the supply pipe 4 or the discharge pipe 5 are formed on both ends of the first fin member 10 in the longitudinal direction. In the first fin member 10, each of the header flow path 11, the header communication flow path 12, and the plate fin flow path 13 is point-symmetrical with the center point in the plan view of the first fin member 10 as the center of symmetry. It is arranged so as to be.

In the first fin member 10, a heat transfer blocking slit 6 which is a missing portion (gap) is formed between the meandering plate fin flow paths 13. By forming the heat transfer blocking slit 6 which is a missing portion (gap) in this way, the heat transfer action between the adjacent plate fin flow paths 13 is suppressed. Further, in the first fin member 10, positioning pin openings 9 for inserting positioning pins (not shown) are formed at a plurality of locations (three locations) so as to surround the header flow path 11. Like the respective flow paths (header flow path 11, plate fin flow path 13), the heat transfer blocking slit 6 and the positioning pin opening 9 have the center point in the plan view of the first fin member 10 as the center of symmetry. It is formed point-symmetrically.

Further, as shown in FIG. 2A, in the first fin member 10, the header communication flow path 12 led out from the header flow path 11 is directly stacked with the plate fin flow path 13 formed on the extension line in the lead-out direction. It is not connected, and a flat flow path transfer region 16 is formed between them. That is, the first fin member 10 has a configuration in which the recess of the header communication flow path 12 and the recess of the first plate fin flow path 13a are not connected.

On the other hand, in the second fin member 20, as shown in FIG. 2B, the transfer flow path 21 is formed at a position facing the flow path transfer region 16 of the first fin member 10. In FIG. 2B, the delivery flow path 21 is formed by a dent that protrudes to the back side of the paper surface. As a result, in the plate fin 2a to which the first fin member 10 and the second fin member 20 are joined, the header communication flow path 12 and the plate fin flow path 13 are in a state of communicating with each other via the transfer flow path 21. .. As a result, the refrigerant supplied from the supply pipe 4 is the header flow path 11, the header communication flow path 12, the transfer flow path 21, the plate fin flow path 13, the transfer flow path 21, the header communication flow path 12, and the header flow path. It flows through 11 and is discharged from the discharge pipe 5.

In the second fin member 20, a plate fin convex region 22 is formed in a region of the first fin member 10 facing the linear first plate fin flow path 13a (see the cross-sectional view of FIG. 16 described later). The plate fin convex region 22 is joined in combination with the first plate fin flow path 13a to secure the flow path shape of the straight portion of the plate fin flow path 13, and to deform the cross-sectional shape orthogonal to the flow direction of the refrigerant. Is suppressed.

In the second fin member 20, a similar heat transfer blocking slit 6 is formed between the plate fin convex regions 22 at a position corresponding to the heat transfer blocking slit 6 formed in the first fin member 10. ing. By forming the heat transfer blocking slit 6 in this way, the heat transfer action between the adjacent plate fin flow paths 13 is suppressed, and the heat exchange efficiency is improved.

Further, in the configuration of the first embodiment, the second fin member 20 is provided with a plurality of spacing defining protrusions 7 for defining the gaps between the stacked plate fins 2a at regular intervals. Since these spacing defining protrusions 7 maintain the distance between the plate fins 2a adjacent to each other in the stacking direction at regular intervals, the outer surface side (plate) of either the first fin member 10 or the second fin member 20 is maintained. In the fin 2a, the surface opposite to the surface on which the first fin member 10 and the second fin member 20 are brazed) or both of them may be provided on the outer surface side, and the arrangement position thereof is a flow path to be formed. It is set appropriately according to the position of.

In the second fin member 20 configured as described above, as in the case of the first fin member 10, each element (similar to the point symmetry with the center point in the plan view of the second fin member 20 as the center of symmetry). A heat transfer blocking slit 6, an interval defining protrusion 7, and a positioning pin opening 9) are arranged.

FIG. 3 is a perspective view showing a state in which two sets of plate fins 2a (first fin member 10 and second fin member 20) are laminated, and shows the vicinity of the header flow path 11. As shown in FIG. 3, a header flow path port 8 which is a notch is formed on the inner peripheral side of the annular recess forming the header flow path 11 in the first fin member 10. The header flow path openings 8 are formed at a plurality of locations on the inner peripheral side of the annular header flow path 11. The header flow path ports 8 (8a, 8b) are formed at opposite positions on the inner peripheral side of the header flow path 11, for example, in the configuration of the first embodiment. The formation position of the header flow path openings 8 (8a, 8b) in the first embodiment is located at a position facing the header flow path 11 on the center line extending in the longitudinal direction of the plate fins 2a passing through the center of the annular header flow path 11. It is formed (see FIG. 2A).

It should be noted that the formation positions of the plurality of header flow path ports 8 in the header flow path 11 include positions that are up and down in the vertical direction in a state where a device (for example, an air conditioner) equipped with the heat exchanger 1 is installed. It is preferably included.

FIG. 4 is a perspective view showing a part of the plate fin laminate 2 according to the first embodiment. FIG. 4 shows a plate fin laminate 2 in which a plurality of plate fins 2a are laminated, but the number of plate fins 2a to be laminated is appropriately set according to the specifications of the heat exchanger 1. In the plate fin laminate 2 shown in FIG. 4, the end plates 3 (3a, 3b) are removed, and the positioning pin is not inserted into the positioning pin opening 9.

FIG. 5 is a perspective view showing the vicinity of the header flow path 11 in the plate fin laminate 2 shown in FIG. FIG. 6 is a perspective view showing a cross section of the plate fin laminate 2 of FIG. 4 cut along the VI-VI line shown in FIG. 2A. As shown in FIGS. 5 and 6, a header opening 11a penetrating in the stacking direction is formed on the inner peripheral side of the header flow path 11 in the plate fin laminated body 2. The refrigerant from the supply pipe 4 to the header flow path 11 or the refrigerant from the header flow path 11 to the discharge pipe 5 flows through the header opening 11a.

In the plate fin laminated body 2, the inner peripheral side of the header flow path 11 constituting the inner surface side of the header opening 11a penetrating in the laminating direction is continuously joined in the laminating direction by brazing. Further, the header flow path 11 is also joined so as to be continuous in the stacking direction on the outer peripheral side. As a result, the inner peripheral side and the outer peripheral side of the header flow path 11 in the plate fin laminated body 2 are in a state of being reliably joined in the stacking direction, and the rigidity of the header flow path 11 is increased.

The refrigerant supplied from the supply pipe 4 flows through the header opening 11a and flows into the header flow path 11 through the header flow path ports 8 (8a, 8b) formed on the inner peripheral side of the header flow path 11. In FIGS. 5 and 6, one first header flow path port 8a of the two header flow path ports 8 facing each other on the inner peripheral side of the header flow path 11 is shown. The first header flow path port 8a and the second header flow path port 8b are arranged on the center line extending in the longitudinal direction passing through the center of the header opening 11a, that is, at positions facing each other on the center line extending in the longitudinal direction in the plate fin 2a. There is.

FIG. 7 is a cross-sectional view showing the vicinity of the header opening 11a in the plate fin laminate 2 in a state of being sandwiched by the end plates 3 (3a, 3b). The cross-sectional view of FIG. 7 is a vertical cross-sectional view cut along the VI-VI line shown in FIG. 2A. FIG. 8 is a vertical cross-sectional view showing a cut surface in the longitudinal direction orthogonal to the cut surface of the vertical cross-sectional view shown in FIG. 7. FIG. 8 shows the vicinity of the header opening 11a in the plate fin laminated body 2, and is a cross-sectional view including the first header flow path port 8a and the second header flow path port 8b.

As shown in FIG. 7, the plate fin laminated body 2 is configured by laminating a plurality of plate fins 2a formed by laminating the first fin member 10 and the second fin member 20. In the first fin member 10, a recess for forming the header flow path 11 is formed on the outer periphery of the header opening 11a. The header flow path 11 (recess) in the first fin member 10 includes a header flow path inner peripheral support portion 10a, a header flow path top portion 10b, and a header flow path outer peripheral support portion 10c that form a wall surface on the outer peripheral side of the header opening 11a. Is formed by. That is, in the first fin member 10, the recess for forming the header flow path 11 is formed by stacking the header flow path top portion 10b having a flat surface and the top portion formed in an annular shape and the header flow path top portion 10b on the inner peripheral side. It is composed of a header flow path inner peripheral support portion 10a which is an inner peripheral wall that supports in the direction, and a header flow path outer peripheral support portion 10c which is an outer peripheral wall that supports the header flow path top portion 10b in the stacking direction on the outer peripheral side.

On the other hand, the second fin member 20 is formed with an inner peripheral support portion 20a which is an outer peripheral portion of the outer periphery of the header opening 11a, and a flat portion 20b is formed following the inner peripheral support portion 20a. The flat portion 20b and the inner peripheral support portion 20a are bent and continuous. The inner peripheral support portion 20a of the second fin member 20 constitutes a wall surface on the outer peripheral side of the header opening 11a. The flat portion 20b of the second fin member 20 closes the recess formed by the header flow path inner peripheral support portion 10a, the header flow path top portion 10b, and the header flow path outer peripheral support portion 10c of the first fin member 10, and opens the header. It is a part of forming an annular header flow path 11 on the outer circumference of 11a.

As described above, in the first fin member 10 of the plate fin laminate 2 according to the first embodiment, the recesses for forming the header flow path 11 are formed in the header flow path inner peripheral support portion 10a and the header flow path top portion 10b. And a header flow path outer peripheral support portion 10c. The header flow path inner peripheral support portion 10a and the header flow path outer peripheral support portion 10c are joined to the flat surface of the second fin member 20 to form a header flow path, which is part of the header flow path inner peripheral support portion 10a. The header flow path port 8 is formed.

Further, the second fin member 20 is bent and continuous with the flat portion 20b having a flat surface and the flat surface of the flat portion 20b, and serves as an outer edge portion of the header opening 11a on the inner peripheral side of the header flow path 11. It has a peripheral support portion 20a and a peripheral support portion 20a. The inner peripheral support portion 20a of the second fin member 20 is joined to the first fin member 10 in another plate fin 2a adjacent in the stacking direction, and the inner peripheral side of the header flow path 11 in the plate fin laminated body 2 is in the stacking direction. It has a structure having a double wall surface extending to.

Further, as shown in the longitudinal sectional view of FIG. 8, the facing region on the inner peripheral side of the header flow path 11 forms the header flow path port 8 (8a, 8b), so that the first fin member 10 is formed. The header flow path inner peripheral support portion 10a is formed to have a short protrusion length from the header flow path top portion 10b. Similarly, the protruding length of the inner peripheral support portion 20a of the second fin member 20 is formed to be short. As described above, the regions of the header flow path inner peripheral support portion 10a and the inner peripheral support portion 20a facing each other in the longitudinal direction are notched, and the header flow path ports 8 (8a, 8b) are formed on the inner peripheral side of the header flow path 11. Is formed.

FIG. 9 is a vertical cross-sectional view showing the first fin member 10 shown in FIG. 7, and shows the first fin member 10 in the vicinity of the header opening 11a. FIG. 10 is a vertical cross-sectional view showing the second fin member 20 shown in FIG. 7, and shows a portion to be joined to the first fin member 10 shown in FIG. FIG. 11 is a vertical cross-sectional view showing the first fin member 10 shown in FIG. 8, and shows header flow path ports 8 (8a, 8b) formed on the outer periphery of the header opening 11a. Similarly, FIG. 12 is a vertical cross-sectional view showing the second fin member 20 shown in FIG. 8, and shows a portion to be joined to the first fin member 10 shown in FIG.

The first fin member 10 shown in FIG. 9 and the second fin member 20 shown in FIG. 10 are bonded and joined to form a header flow path 11 on the outer periphery of the header opening 11a in one plate fin 2a. The header. When the header flow path 11 is formed in this way, the header flow path inner peripheral support portion 10a of the first fin member 10 shown in FIG. 11 and the inner peripheral support portion 20a of the second fin member 20 shown in FIG. 12 The header flow path port 8 (8a, 8b) in the header flow path 11 is formed, and the header opening 11a communicates with the inside of the header flow path 11 via the header flow path port 8 (8a, 8b).

As shown in FIG. 9, in the first fin member 10, the inner peripheral side end portion of the header flow path inner peripheral support portion 10a protrudes toward the inner peripheral side, and the inner peripheral side protruding end portion 10d is formed. Has been done. The inner peripheral side end portion of the inner peripheral support portion 20a of the second fin member 20 in the plate fins 2a adjacent in the stacking direction is in contact with the protruding end portion 10d on the inner peripheral side. Therefore, in the plate fin laminated body 2, the protruding end portion 10d on the inner peripheral side of the first fin member 10 and the inner peripheral side end portion of the inner peripheral support portion 20a of the second fin member 20 are joined to each other. (See FIG. 7).

As described above, in each plate fin 2a in the plate fin laminate 2, the header communication flow path 12 connected to the header flow path 11 is passed through the transfer flow path 21 formed in the second fin member 20. It is configured to be connected to the first plate fin flow path 13a.

FIG. 13 is a perspective view showing a vertical cross section of the plate fin laminate 2 cut along the longitudinal direction thereof. FIG. 13 shows a cross section in which the header communication flow path 12 and the first plate fin flow path 13a communicate with each other through the transfer flow path 21 in each plate fin 2a. FIG. 14 is an end view of the plate fin laminate 2 cut along the longitudinal direction, and shows the vicinity of the transfer flow path 21.

As shown in FIGS. 13 and 14, the header communication flow path 12 formed in the first fin member 10 in each plate fin 2a is the first through the transfer flow path 21 formed in the second fin member 20. It communicates with the plate fin flow path 13 formed in the fin member 10. Therefore, in the plate fin laminate 2, for example, the refrigerant supplied from the supply pipe 4 flows through the header opening 11a, the header flow path 11, the header communication flow path 12, the transfer flow path 21, and the plate fin flow path 13. .. At this time, in the configuration shown in FIG. 14, the refrigerant flows downward from the header communication flow path 12 to the transfer flow path 21, and the refrigerant flows upward from the transfer flow path 21 to the plate fin flow path 13. That is, the refrigerant moves while swelling in the vertical direction (stacking direction) before and after the delivery flow path 21, and the flow path is longer than the flat flow path.

FIG. 15 is a perspective view showing a vertical cross section of the plate fin laminate 2 according to the first embodiment, which is cut along a plane orthogonal to the longitudinal direction thereof. FIG. 16 is an end view of the plate fin laminate 2 showing the vertical cross section of FIG. As shown in FIGS. 15 and 16, in the plate fin laminate 2 laminated between the end plates 3 (3a, 3b) at both ends, a second fin member 20 which is one of the plate fins 2a is located at the upper end thereof. A first fin member 10 which is the other side of the plate fin 2a is arranged at the lower end thereof.

In the heat exchanger of the first embodiment, the lower surface of the upper first end plate 3a in the end plates 3 at both ends and the joint surface of the second fin member 20 arranged immediately below the lower surface of the first end plate 3a are in complete contact with each other. .. Here, the joint surface means a surface on which the first fin member 10 and the second fin member 20 are joined in the plate fin 2a.

On the other hand, a first fin member 10 which is the other side of the plate fins 2a is arranged at the lower end of the plate fin laminate 2, and the upper surface of the lower second end plate 3b and the joint surface of the first fin member 10 are arranged. It is in full contact. This is because the flat surface becomes wider and the contact area becomes larger by making the joint surface of the second fin member 20 to be joined to the first fin member 10 face the upper first end plate 3a. .. Similarly, by facing the joint surface of the first fin member 10 to be joined to the second fin member 20 with respect to the lower second end plate 3b, the flat surface becomes wider and the contact area becomes larger.

FIG. 17 shows a plate composed of a first fin member 10 in contact with the lower second end plate 3b, and a second fin member 20 and a first fin member 10 laminated on the first fin member 10. It is an exploded perspective view which shows the fin 2a. FIG. 17 is a perspective view seen from below in the stacking direction. FIG. 18 shows a plate fin composed of a second fin member 20 in contact with the upper first end plate 3a, and a first fin member 10 and a second fin member 20 laminated under the second fin member 20. It is an exploded perspective view which shows 2a. FIG. 18 is a perspective view seen from above in the stacking direction.

In FIGS. 17 and 18, the areas where the fin members (10, 20) are in contact with each other and are joined are shown by shaded areas. The area of contact between the first fin member 10 and the second fin member 20 constituting the plate fin 2a is a brazed area. As shown in FIGS. 17 and 18, the area of contact between the end plate 3 (3a, 3b) and the first fin member 10 or the second fin member 20 is wide and overall, and is therefore special to the end plate 3. The plate fin laminate 2 can be reliably held by being joined to the first fin member 10 or the second fin member 20 substantially evenly without any processing.

Since the first fin member 10 and the second fin member 20 arranged at both ends of the plate fin laminated body 2 in the stacking direction are in contact with the end plate 3 as described above, the refrigerant from the supply pipe 4 is used. Flows into the header opening 11a of the first fin member 10 and the second fin member 20. However, in the first fin member 10 in contact with the second end plate 3b, the tip of the header communication flow path 12 is blocked to form a flat flow path transfer region 16. Therefore, in the first fin member 10 in contact with the second end plate 3b, the refrigerant does not flow into the plate fin flow path 13. On the other hand, the second fin member 20 in contact with the first end plate 3a has a configuration in which only the transfer flow path 21 is formed as the flow path, and the header flow path 11 is not formed, so that the header opening There is no flow path through which the refrigerant of 11a flows.

As described above, in the configuration of the heat exchanger 1 of the first embodiment, one of the members constituting the plate fins 2a is arranged at both ends of the plate fin laminated body 2 in the stacking direction, so that the end plate 3 is The plate fin laminate 2 can be reliably held without any special processing. In the plate fin laminate 2 held by the end plate 3, the region between the header regions where the header flow paths 11 provided on both sides in the longitudinal direction of the plate fins 2a are formed becomes the heat exchange region C, and the heat exchange thereof. A plate fin flow path 13 having a desired shape is formed in the region C. Between the heat exchange regions C of the laminated plate fins 2a so that the air, which is the second fluid B, can efficiently contact and flow with respect to the plate fin flow path 13 formed in the heat exchange region C. Has a predetermined gap. As described above, the gap between the plate fins 2a adjacent to each other in the stacking direction is secured by a plurality of spacing defining protrusions 7 (see FIG. 2B) provided on the first end plate 3a and / or the second end plate 3b. ing.

In the heat exchanger 1 of the first embodiment configured as described above, the header flow path 11 has the header flow path inner peripheral support portion 10a of the first fin member 10, the header flow path top portion 10b, and the header flow path outer circumference. A header flow formed by a recess formed by the support portion 10c and a flat portion 20b formed by a substantially flat surface of the second fin member 20 and formed in the header flow path inner peripheral support portion 10a. The refrigerant is supplied from the supply pipe 4 through the road opening 8.

In the plate fin laminate 2 of the first embodiment, the header flow path 11 formed on the outer periphery of the header opening 11a in each plate fin 2a is on the inner peripheral side of the header flow path inner peripheral support portion 10a of the first fin member 10. Is joined on the outer peripheral side of the header flow path outer peripheral support portion 10c. Further, in the stacked plate fins 2a, header flow paths adjacent to each other in the stacking direction are joined. Therefore, the header flow path 11 in the first embodiment has a highly rigid configuration, and even if the high-pressure refrigerant from the supply pipe 4 is supplied to the header flow path 11 from the header opening 11a through the header flow path port 8. , The header flow path 11 is prevented from being deformed such as being expanded, and the flow path having a desired shape is surely maintained. Therefore, in the heat exchanger 1 of the first embodiment, highly efficient heat exchange can be performed with high reliability.

As described above, in the heat exchanger 1 of the first embodiment, the laminated structure of the first fin member 10 and the second fin member 20 enhances the strength of the header flow path in each plate fin 2a and plate fins. It is possible to achieve weight reduction, miniaturization, and efficiency of heat exchange in the laminated body 2. According to the configuration of the first embodiment, it is possible to provide a highly reliable heat exchanger capable of flowing a high-pressure refrigerant through the flow path.

In the configuration of the first embodiment described above, the inner circumference side of the header flow path 11 of the plate fin 2a is the inner circumference of the header flow path inner circumference support portion 10a of the first fin member 10 and the second fin member 20. It is composed of a wall surface having a double structure with a support portion 20a. As a result, in the heat exchanger 1 of the first embodiment, the strength of the inner peripheral side of the header flow path 11 to which the refrigerant is supplied from the supply pipe 4 is increased, and the high-pressure refrigerant flows into the header flow path 11. Is possible.

Further, in the configuration of the first embodiment, the joint surfaces of the first fin member 10 or the second fin member 20 constituting the plate fin 2a are brought into contact with the end plates 3 provided at both ends of the heat exchanger 1. It is configured as follows. Therefore, the plate fin laminate 2 can be reliably sandwiched without any special processing on the end plate 3, and the first fin member 10 or the second fin member 20 in contact with the end plate 3 can be reliably sandwiched. In the above, the structure is such that the flow of the refrigerant can be prevented without any special processing, and the leakage of the refrigerant is prevented in the end plate 3.

[Modification example]
FIG. 19 is a vertical cross-sectional view schematically showing a modified example of the configuration of the first embodiment. FIG. 19 shows the vicinity of the header flow path 11 in the first fin member 10A and the second fin member 20A. As shown in FIG. 19, the recess forming the header flow path 11 in the first fin member 10A includes a header flow path top portion 10Ab formed in an annular shape and having a flat surface, and the header flow path top portion 10Ab on the inner peripheral side and the outer peripheral side. It is composed of a header flow path support portion (header flow path inner peripheral support portion 10Aa, header flow path outer peripheral support portion 10Ac) formed so as to support in the stacking direction on both sides. The header flow path outer peripheral support portion 10Ac that supports the header flow path top portion 10Ab on the outer peripheral side is continuous with the heat exchange region C in which the plate fin flow path 13 is formed via a bent portion. As shown in the vertical cross-sectional view of FIG. 19, the recess for forming the header flow path 11 is between the header flow path inner peripheral support portion 10Aa, the header flow path top portion 10Ab, and the header flow path outer peripheral support portion 10Ac. Is bent and continuous in a U shape, and the cross section orthogonal to the flow path direction is a substantially square flow path.

On the other hand, in order to form the header flow path 11 in each plate fin 2Aa, the second fin member 20A joined to the first fin member 10A has the header flow path inner peripheral support portion 10Aa and the header as shown in FIG. It has a flat portion 20Ab which is a flat surface so as to cover a recess formed by a flow path top portion 10Ab and a header flow path outer peripheral support portion 10Ac. The second fin member 20A in the modified example shown in FIG. 19 is different from the inner peripheral support portion 20a of the second fin member 20 shown in FIG. 6 described above, so that the inner peripheral side end portion of the second fin member 20A hangs down. It is not a good shape.

Therefore, in the plate fin laminate 2A of this modification, the inner peripheral side of the header flow path 11 is composed of the header flow path inner peripheral support portion 10Aa of the first fin member 10A, and the header flow path 11 of the plate fin 2Aa. The inner peripheral side of is a single structure. In FIG. 19, the lead-out end, which is the lower end of the header flow path inner peripheral support portion 10Aa, is joined to the inner peripheral side tip portion of the second fin member 20A. The header flow path top portion 10Ab connected to the upper end of the header flow path inner peripheral support portion 10Aa is joined to the flat portion 20Ab of the second fin member 20A of the plate fins 2Aa adjacent in the stacking direction. That is, the inner peripheral side and the outer peripheral side of the header flow path 11 of the modified example shown in FIG. 19 are composed of a header flow path support portion which is a wall surface which is joined and connected vertically in the stacking direction.

As a result, in the modified plate fin laminate 2A, the header flow path 11 has a high rigidity even if the inner peripheral side has a single structure. Further, the inner peripheral side of the header flow path 11 in the plate fins 2Aa to be laminated has a single structure, but since each layer is continuously joined, a highly rigid refrigerant passage is formed. A header flow path port 8 is formed in this refrigerant passage for each stacking, so that a high-pressure refrigerant can be supplied to the header flow path 11 of the plate fins 2Aa of each layer.

Other configurations (for example, header communication flow path 12, plate fin flow path 13, transfer flow path 21, etc.) in the modified example shown in FIG. 19 are the same as the configurations described in the first embodiment.

(Embodiment 2)
Next, the laminated plate fin heat exchanger of the second embodiment according to the present disclosure (hereinafter, simply referred to as a heat exchanger) will be described. FIG. 20 is a perspective view showing a plate fin laminate 100 in the heat exchanger of the second embodiment. FIG. 21 is a cross-sectional view of a region where the header flow path 130 is formed in the plate fin laminate 100 according to the second embodiment.

In FIGS. 20 and 21, the same numbers are assigned to the elements having substantially the same functions and configurations as those in the first embodiment. Further, since the basic operation of the heat exchanger of the second embodiment is the same as that of the heat exchanger 1 of the first embodiment, the second embodiment is mainly different from the first embodiment. explain. The heat exchanger of the second embodiment is significantly different from the heat exchanger 1 of the first embodiment in the shape of the header flow path.

As shown in FIGS. 20 and 21, the first fin member 110 and the second fin member 120 are joined (brazed) to form one plate fin 100a, as in the configuration of the first embodiment. Each of the first fin member 110 and the second fin member 120 in the second embodiment has an annular recess at an opposite position where the header flow path 130 is formed. The header flow path 130 is formed by joining the first fin member 110 and the second fin member 120. Therefore, the header flow path 130 in the second embodiment has a cross section orthogonal to the flow direction of the flow path larger than that of the header flow path 11 in the first embodiment (for example, in the case of similar plate fins, the flow path direction). The cross-sectional area orthogonal to is approximately doubled).

A plurality of spacing defining protrusions 7 are formed on the surface side of the first fin member 110 in the second embodiment as a whole in order to secure a distance between the plate fins 100a adjacent to each other in the stacking direction. As for the arrangement position of these spacing defining protrusions 7, the distance between the plate fins 100a adjacent to each other in the stacking direction is equal as in the second fin member 20 (see FIG. 2B) in the first embodiment. It is distributed and arranged in. Further, the first fin member 110 is formed with positioning pin openings 9 on both sides of the header flow path 130 so as to be arranged in a direction orthogonal to the longitudinal direction of the plate fin laminate 100. That is, the header flow path 130 and the positioning pin opening 9 are arranged in a row in a direction orthogonal to the longitudinal direction of the plate fin laminate 100, and are arranged in parallel with the flow direction of the air which is the second fluid B. ..

The second fin member 120 in the second embodiment is formed with the header communication flow path 12 and the plate fin flow path 13 as in the first fin member 10 in the first embodiment (see FIG. 2A). Therefore, in order to communicate the header communication flow path 12 of the second fin member 120 with the plate fin flow path 13, the first fin member 110 is formed with a transfer flow path 21 (see FIG. 20).

In the heat exchanger according to the second embodiment, similarly to the heat exchanger 1 of the first embodiment, the high-pressure refrigerant from the supply pipe 4 is supplied to the header flow path 130, so that the inner circumference of the header flow path 130 is supplied. A header flow path port 80 is formed on the side (see FIG. 21). The header flow path port 80 in the second embodiment is formed by cutting out a part of the inner peripheral side end portion of the first fin member 110 forming the header flow path 130.

As shown in FIG. 21, in the first fin member 110 and the second fin member 120 constituting one plate fin 100a, a region where the inner peripheral side and the outer peripheral side of the header flow path 130 are joined (brazed). Become. Therefore, in the header flow path 130, the header flow path is prevented from being deformed in the configuration in which the high-pressure refrigerant is sucked from the header flow path port 80, and has a highly reliable header flow path. ..

In the configuration of the second embodiment, the header flow path port 80 is formed at a position facing the inner peripheral side of the header flow path 130, and is in the longitudinal direction of the plate fin 100a passing through the center of the annular header flow path 130. It is formed at a position on the center line extending to. By forming the header flow path port 80 so as to face the position in the longitudinal direction of the header flow path 130 in this way, the plate fins are laminated in a state where the heat exchanger is provided in the device (for example, air conditioning equipment). Since the body 100 is provided at an angle of a predetermined angle from the vertical direction with respect to the longitudinal direction thereof, for example, at an angle of 45 degrees, the header flow path port 80 facing the body 100 is in a vertical position in the vertical direction. Therefore, when the refrigerant of the supply pipe 4 flows separately in the state of the liquid phase and the gas phase, the refrigerant of the liquid phase and the gas phase is supplied to the header flow path ports 80 at the upper and lower positions. As a result, a similar refrigerant with a balanced liquid phase and gas phase was supplied to the plate fin flow paths 13 of the laminated layers in the heat exchange region, and the plate fin laminated body 100 was generally balanced. The configuration is such that highly efficient heat exchange can be performed.

In the configurations of the first embodiment and the second embodiment, the header flow path has been described as having an annular shape, but the present disclosure is not specified in this shape, and is not limited to a simple annular shape. For example, it includes various shapes such as a C shape and an arc shape that are not connected in a ring shape.

According to the present disclosure, it is possible to achieve weight reduction, miniaturization, and efficiency, and to provide a highly reliable heat exchanger even in a configuration in which a high-pressure refrigerant flows.

As described in the first and second embodiments, the heat exchanger of the present disclosure has a header flow path in which the refrigerant is supplied from the inner peripheral side of the header flow path, and the plate fins are laminated. The inner peripheral side and the outer peripheral side of the header flow path of each layer in the body are joined to form a highly rigid structure. In the heat exchanger configured in this way, it is possible to supply a refrigerant having a desired high pressure to the plate fin laminate, and the heat exchanger has a highly efficient heat exchange function.

In the plate fin laminate of the heat exchanger of the present disclosure, since the header flow path is formed by the multilayer support portions (header flow path inner peripheral support portion, header flow path outer peripheral support portion) connected in the stacking direction, the header flow path is formed. The pressure resistance vulnerability in the header is greatly reduced, and the rigidity of the header flow path is increased. As a result, in the heat exchanger of the present disclosure, stable operation can be maintained even when a refrigerant having a pressure higher than a certain level is flowed.

Further, in the plate fin laminate of the heat exchanger of the present disclosure, a header flow path port is formed in a support portion on the inner peripheral side of the header flow path, and this header flow path port is the first flow to the flow path of each plate fin. I'm talking. Since the header flow path port of the header flow path has a configuration in which the opening shape and formation position can be appropriately set, the ideal refrigerant state (liquid phase-gas layer balance) in the heat exchanger of the present disclosure is used. It is a configuration that can be optimized for the state) and further improve the performance.

Further, in the configuration of the heat exchanger according to the present disclosure, since the plate fin laminate of the laminated plate fins is joined as a whole to have rigidity, the end plate is made of a relatively thin metal material. Can be configured. Since the end plate is configured to be equipped with a member for positioning the laminated plate fins and a supply / discharge pipe, the plate fin laminates are strongly sandwiched in the stacking direction, so that the end plates are thick and highly rigid. There is no need to use materials. As a result, the end plates in the heat exchanger of the present disclosure do not have a large difference in heat capacity from the plate fins to be joined, and the member strengths do not differ significantly. The occurrence of poor attachment is greatly suppressed. Therefore, the heat exchanger of the present disclosure has a pressure resistance to the supplied refrigerant and has a highly reliable configuration.

As described above, in the configuration of the heat exchanger according to the present disclosure, weight reduction, miniaturization, and high efficiency of heat exchange can be achieved, and a high-pressure refrigerant is applied to the plate fins of each layer in the plate fin laminate. It is possible to provide a heat exchanger having a high reliability and a high heat exchange efficiency.

Although the present disclosure has been described in each embodiment with some detail, these configurations are examples, and the disclosure content of these embodiments should vary in the details of the configuration. In the present disclosure, substitutions, combinations, and sequence changes of elements in each embodiment can be realized without departing from the claimed scope and ideas.

The present disclosure can provide a highly reliable heat exchanger that can achieve weight reduction, miniaturization, and high efficiency of heat exchange, so that an air conditioner having a high market value can be constructed.

1

Heat exchanger

2,2A, 100 Plate fin laminate 2a, 2Aa, 100a Plate fin 3 End plate 3a 1st end plate 3b 2nd end plate 4 Feed pipe 5 Discharge pipe 6 Heat transfer cutoff slit 7

Interval regulation protrusion

8, 80 Header flow path port 8a 1st header flow path port 8b 2nd header flow path port 9

Positioning pin openings

10, 10A, 110 1st fin member 10a, 10Aa Header flow path inner peripheral support 10b, 10Ab Header flow path top 10c, 10Ac Header flow path Outer circumference support part 10d Protruding end on the inner circumference side 11,130 Header flow path 11a Header opening 12 Header communication flow path 13 Plate fin flow path 13a First plate fin flow path (straight)
13b 2nd plate fin flow path (arc-shaped)
16 Flow

path transfer area

20, 20A, 120 Second fin member 20a Inner circumference support portion 20b, 20Ab Flat portion 21 Delivery flow path

Claims

A plate fin laminate in which plate fins having a flow path through which the first fluid flows are laminated, and
A supply / discharge pipe for supplying or discharging the first fluid flowing through the flow path of the plate fins of each layer in the plate fin laminate is provided.
A heat exchanger in which a second fluid is allowed to flow through the gaps between the layers of the plate fin laminate to exchange heat between the first fluid and the second fluid flowing through the flow path of the plate fins.
The plate fin
When the supply / discharge pipe functions as a supply / discharge pipe, a header opening into which the first fluid is supplied from the supply / discharge pipe and
A header flow path formed around the header opening and
A plate fin flow path through which the first fluid flows from the header flow path and exchanges heat with the second fluid is included.
A heat exchanger having a structure in which the inner peripheral side of the header flow path is continuously joined in the stacking direction in the plate fin laminate.
The heat exchanger according to claim 1, wherein the plate fin laminate has a configuration in which the outer peripheral side of the header flow path is continuously joined in the stacking direction.
The heat exchanger according to claim 1 or 2, wherein in the plate fin laminated body, the inner peripheral side of the header flow path is formed of a wall surface continuous in the stacking direction.
The heat exchanger according to any one of claims 1 to 3, wherein in the plate fin laminate, the inner peripheral side of the header flow path is composed of a wall surface having a double structure.
The heat according to any one of claims 1 to 4, wherein in the plate fin, a header flow path port that communicates the header opening and the header flow path is arranged on the inner peripheral side of the header flow path. Exchanger.
The plate fin according to any one of claims 1 to 5, wherein a plurality of header flow path ports communicating the header opening and the header flow path are arranged on the inner peripheral side of the header flow path. Heat exchanger.
The heat exchanger according to claim 6, wherein the header flow path port is formed at a position facing the inner peripheral side of the header flow path.
The heat exchanger according to claim 7, wherein the header flow path port is formed at an opposite position on a center line extending in the longitudinal direction in the plate fin.
The plate fin has a structure in which a first fin member and a second fin member are joined to form a flow path.
The first fin member has a recess for forming the header flow path.
Any one of claims 1 to 8, wherein the second fin member is joined to the first fin member and has a flat surface for forming the recess in the first fin member in the header flow path. The heat exchanger described in.
In the first fin member, the recess for forming the header flow path has a header flow path inner peripheral support portion, a header flow path top portion, and a header flow path outer peripheral support portion.
The header flow path inner peripheral support portion and the header flow path outer peripheral support portion are joined to the flat surface of the second fin member to form the header flow path.
The heat exchanger according to claim 9, wherein a header flow path port for communicating the header opening and the header flow path is formed in a part of the header flow path inner peripheral support portion.
The second fin member has a flat surface and an inner peripheral support portion that bends and continues to the flat surface and serves as an outer edge portion of the header opening on the inner peripheral side of the header flow path.
The inner peripheral support portion of the second fin member is joined to the first fin member in another plate fin adjacent in the stacking direction, and the inner peripheral side of the header flow path in the plate fin laminated body forms a double wall surface. The heat exchanger according to claim 9 or 10.