JP2018138847A - Laminated heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminated heat exchanger capable of improving pressure tightness.SOLUTION: The laminated heat exchanger includes a heat exchange part 12 formed with a plurality of plate-like members 11 laminated and joined with one another, the plate-like members 11 being each formed with a cylindrical protruded part 11f protruded toward one side or the other side in a plate-laminated direction. To an outside plate-like member 11A as the plate-like member 11 arranged on the outermost side in the plate-laminated direction, out of the plurality of plate-like members 11, a case plate 40 is joined. In the face of the case plate 40, facing the outside plate-like member 11A, a recessed part 41 is formed which is recessed toward the opposite side to the outside plate-like member 11A. The protruded part 11f and the recessed part 41 form a refrigerant tank part 14 or a cooling water tank part 16. An outside protruded part 110f as the protruded part 11f of the outside plate-like member 11A is protruded toward the side of the case plate 40. The outer face of the outside protruded part 110f is joined to the inner face of the recessed part 41.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a stacked heat exchanger that exchanges heat between a refrigerant of a refrigeration cycle and a heat medium.

  Conventionally, for example, Patent Document 1 discloses a stacked heat exchanger that exchanges heat between a refrigerant and a heat medium. In this patent document 1, the heat exchange part which heat-exchanges a refrigerant | coolant and a heat medium is comprised by laminating | stacking several substantially flat plate-shaped member. In the heat exchanging portion, the refrigerant flow paths and the heat medium flow paths are alternately formed between the plate-like members.

  Moreover, in patent document 1, the plate-shaped member has the cylindrical member which protrudes in the lamination direction of a plate-shaped member. By joining the cylindrical members of the heat transfer plates, a refrigerant tank section or a heat medium tank section is configured. The refrigerant tank unit is a tank that distributes or collects refrigerant to a plurality of refrigerant flow paths. The heat medium tank unit is a tank that distributes or collects the heat medium to the plurality of heat medium flow paths.

Japanese Patent Laying-Open No. 2015-59669

  In general, in a stacked heat exchanger such as Patent Document 1, a core portion is formed by alternately stacking a plurality of two types of plate-like members. In addition, a case plate to which an inflow / outflow portion for allowing the refrigerant or the heat medium to flow in / out is connected to the core portion (the refrigerant flow path or the heat medium flow path).

  However, since the plate-like member joined to the case plate (hereinafter referred to as the outer plate-like member) has the same shape as the other plate-like members constituting the core portion, avoid the protruding portion of the outer plate-like member. In addition, it is necessary to join the case plate to the outer plate member. That is, it is necessary to form a part of the case plate so as to cover the entire protruding portion of the outer plate member and to join the planar portion of the outer plate member and the planar portion of the case plate.

  For this reason, the pressure of the refrigerant | coolant or heat medium which distribute | circulates a refrigerant | coolant tank part or a heat medium tank part is applied to the whole surface of the site | part formed so that the whole protrusion part of the outer side plate-shaped member in a case plate might be covered. Therefore, in the case plate, the pressure receiving area that receives the pressure of the refrigerant increases, so that the pressure resistance may be reduced.

  In view of the above points, an object of the present invention is to provide a stacked heat exchanger that can improve pressure resistance.

  In order to achieve the above object, the invention according to claim 1 is formed by stacking and joining a plurality of plate-like members (11) to each other, and heat exchange between the refrigerant and the heat medium of the refrigeration cycle. And a plate-like case plate (40) joined to the heat exchanging unit and connected to the inflow / outflow unit (21, 22) for allowing the refrigerant or the heat medium to flow into and out of the heat exchanging unit. The heat exchange part is formed between the plurality of plate-shaped members, and is formed between the plurality of refrigerant flow paths (121) through which the refrigerant flows and the plurality of plate-shaped members, A plurality of heat medium flow paths (122) through which the medium flows, a refrigerant tank section (14) that distributes or collects the refrigerant to the plurality of refrigerant flow paths, and a distribution of the heat medium to the plurality of heat medium flow paths Or heat medium tank section (16) for performing assembly The refrigerant flow path and the heat medium flow path are alternately arranged in the stacking direction of the plurality of plate-like members, and the plate-like member faces one side or the other side of the stacking direction. A cylindrical projecting portion (11f) is formed, and a plate-like member disposed on the outermost side in the stacking direction among the plurality of plate-like members is defined as an outer plate-like member (11A), and the outer plate. When the projecting portion of the plate-shaped member is the outer projecting portion (110f), a case plate is joined to the outer plate-shaped member, and the outer plate-shaped member is disposed on the surface of the case plate facing the outer plate-shaped member. A recess (41) that is recessed toward the opposite side is formed, and the refrigerant tank portion or the heat medium tank portion is formed by the protrusion and the recess, and the outer protrusion protrudes toward the case plate side. The outer surface of the outside protrusion and the inside of the recess Door is joined.

  According to this, the outer surface of the outer protrusion (110f) of the outer plate-like member (11) disposed on the outermost side of the heat exchange part (12) and the inner surface of the recess (41) of the case plate (40) Since it joins, the pressure receiving area which receives the pressure of a refrigerant | coolant or a heat medium in a case plate (40) can be made small. Therefore, the pressure resistance can be improved.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

It is a top view which shows the laminated heat exchanger which concerns on 1st Embodiment. It is II arrow directional view of FIG. It is an expanded sectional view which expanded a part of lamination type heat exchanger concerning a 2nd embodiment. It is a perspective view which shows the offset fin in 1st Embodiment. It is the expanded sectional view which expanded the V section of FIG. It is the expanded sectional view which expanded the principal part of the laminated heat exchanger which concerns on a comparative example. It is the expanded sectional view which expanded the principal part of the lamination type heat exchanger concerning a 2nd embodiment. It is the expanded sectional view which expanded the principal part of the lamination type heat exchanger concerning a 3rd embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the same or equivalent parts are denoted by the same reference numerals in the drawings.

(First embodiment)
1st Embodiment of this invention is described based on figures. A stacked heat exchanger 10 shown in FIG. 1 constitutes a refrigeration cycle of a vehicle air conditioner. The stacked heat exchanger 10 exchanges heat between the high-pressure side refrigerant and the cooling water in the refrigeration cycle to condense the high-pressure side refrigerant, or heat exchange between the low-pressure side refrigerant and the cooling water in the refrigeration cycle. It is an evaporator which evaporates the side refrigerant. Note that the cooling water of the present embodiment corresponds to the heat medium of the present invention.

  As the cooling water, for example, a liquid containing at least ethylene glycol, dimethylpolysiloxane or nanofluid, or an antifreeze liquid can be used. In this embodiment, ethylene glycol antifreeze (LLC) is used as the cooling water.

  The stacked heat exchanger 10 includes a heat exchange unit 12 that exchanges heat between the refrigerant and the cooling water, and a case plate 40 that is joined to the heat exchange unit 12. Details of the case plate 40 will be described later.

  The heat exchange part 12 is integrally formed by laminating and joining a plurality of plate-like members 11.

  Hereinafter, the stacking direction of the plate-like members 11 (vertical direction in the example of FIG. 1) is referred to as a plate stacking direction. One side in the plate stacking direction, that is, one end side in the plate stacking direction (the lower end side in the example of FIG. 1) is referred to as one end side in the plate stacking direction. The other side in the plate stacking direction, that is, the other end side in the plate stacking direction (the upper end side in the example of FIG. 1) is referred to as the other end side in the plate stacking direction. The plate lamination direction is a direction substantially orthogonal to the plate surface of the plate-like member 11.

  The plate-like member 11 is an elongated, substantially rectangular plate material. As a specific material of the plate-like member 11, for example, a double-sided clad material in which a brazing material is clad on both sides of an aluminum core material is used.

  On the outer peripheral edge portion of the substantially rectangular plate-like member 11, an overhang portion 111 protruding in the plate stacking direction is formed. The plurality of plate-like members 11 are joined to each other by brazing, with the overhanging portions 111 being laminated together. Further, the plurality of plate-like members 11 are arranged such that the protruding tips of the overhanging portions 111 face the same side (substantially upward in the example of FIG. 1).

  The heat exchange unit 12 includes a plurality of refrigerant channels 121, a plurality of cooling water channels 122, a first refrigerant tank unit 13, a second refrigerant tank unit 14, a first cooling water tank unit 15, and a second cooling water tank unit 16. I have.

  The coolant channel 121 is formed between the plurality of plate-like members 11 and is configured so that the coolant flows. The cooling water channel 122 is formed between the plurality of plate-like members 11 and is configured so that the cooling water flows. The longitudinal directions of the refrigerant flow path 121 and the cooling water flow path 122 coincide with the longitudinal direction of the plate-like member 11.

  The refrigerant flow path 121 and the cooling water flow path 122 are alternately laminated (parallel arrangement) one by one in the plate lamination direction. The plate-like member 11 serves as a partition wall that partitions the coolant channel 121 and the cooling water channel 122. Heat exchange between the refrigerant flowing through the refrigerant flow path 121 and the cooling water flowing through the cooling water flow path 122 is performed via the plate-like member 11.

  The first refrigerant tank unit 13 and the second refrigerant tank unit 14 distribute or collect the refrigerant with respect to the plurality of refrigerant channels 121. The first cooling water tank unit 15 and the second cooling water tank unit 16 distribute or collect cooling water to the plurality of cooling water flow paths 122.

  As shown in FIGS. 1 and 2, the first refrigerant tank unit 13 and the first cooling water tank unit 15 are arranged on one side of the refrigerant channel 121 and the cooling water channel 122 with respect to the heat exchange unit 12 (in FIG. 1). In the example, it is arranged at the end on the right side). The second refrigerant tank unit 14 and the second cooling water tank unit 16 are arranged at the other side (left side in the example of FIG. 1) end of the refrigerant channel 121 and the cooling water channel 122 with respect to the heat exchange unit 12. Has been.

  The first refrigerant tank portion 13, the second refrigerant tank portion 14, the first cooling water tank portion 15 and the second cooling water tank portion 16 are formed at the four corners of the plate-like member 11 (upper, lower, left and right corners in the example of FIG. 2). It is comprised by the made communication hole. In the present embodiment, the first refrigerant tank part 13 and the second refrigerant tank part 14 are provided at two corners on the diagonal line among the four corners of the substantially rectangular plate-like member 11, and the remaining two A first cooling water tank unit 15 and a second cooling water tank unit 16 are provided at the corners.

  Here, among the plurality of plate-like members 11, the plate-like members arranged on the outermost side in the plate stacking direction are referred to as outer plate-like members 11A and 11B. Of the outer plate-like members 11A and 11B, the one arranged on the one end side in the plate stacking direction is called the first outer plate-like member 11A, and the one arranged on the other end side in the plate stacking direction is the second outer plate-like member. It is called member 11B.

  A case plate 40 is joined to the first outer plate-shaped member 11A. The case plate 40 is formed in a plate shape and is thicker than the plate member 11. The case plate 40 is connected to inflow / outflow portions 21 and 22 for allowing the refrigerant or cooling water to flow into and out of the heat exchanging portion 12.

  Specifically, the first joint 21 and the first cooling water pipe 22 are attached to the case plate 40. The first joint 21 is a member for joining the refrigerant pipes and forms the refrigerant inlet 101 of the stacked heat exchanger 10. The first cooling water pipe 22 forms the cooling water outlet 102 of the stacked heat exchanger 10. Accordingly, the first joint 21 and the first cooling water pipe 22 of the present embodiment correspond to the inflow / outflow portions 21 and 22 of the present invention.

  A second joint 23 and a second cooling water pipe 24 are attached to the second outer plate-shaped member 11B. The second joint 23 is a member for joining the refrigerant pipes, and forms the refrigerant outlet 103 of the stacked heat exchanger 10. The second cooling water pipe 24 forms the cooling water inlet 104 of the stacked heat exchanger 10.

  The refrigerant inlet 101 and the refrigerant outlet 103 communicate with the first refrigerant tank portion 13. The cooling water outlet 102 and the cooling water inlet 104 communicate with the first cooling water tank unit 15.

  As shown in FIG. 3, the plurality of plate-like members 11 have cylindrical protrusions 11 f that protrude toward one end side or the other end side in the plate stacking direction at the four corners of the plate-like member 11. The protrusion 11f is formed so that the inner diameter increases toward one end in the plate stacking direction, that is, the inner diameter increases as the case plate 40 is approached.

  More specifically, the heat exchanging unit 12 includes a plurality of plate-like members 11, a first plate-like member 1101 having a protruding portion 11 f that protrudes toward one end in the plate stacking direction, and the other end in the plate stacking direction. And a second plate-like member 1102 having a protruding portion 11f protruding. The first plate-like member 1101 and the second plate-like member 1102 are alternately stacked.

  The inner diameter of the protrusion 11 f of the first plate member 1101 is equal to the outer diameter of the protrusion 11 f of the second plate member 1102. And the refrigerant tank parts 13 and 14 and the cooling water tank parts 15 and 16 are joined by joining the inner surface of the protrusion part 11f of the 1st plate-shaped member 1101, and the outer surface of the protrusion part 11f of the 2nd plate-shaped member 1102. Are formed respectively.

  Of the plurality of plate-like members 11 constituting the heat exchanging portion 12, the central plate-like member 11 </ b> C located at a substantially central portion in the plate stacking direction closes the protruding portion 11 f constituting the first refrigerant tank portion 13. 11g. Thereby, the 1st refrigerant | coolant tank part 13 is partitioned off into two spaces in the board lamination direction. The closing portion 11g is formed integrally with the protruding portion 11f, that is, the central plate member 11C.

  Therefore, as indicated by the solid line arrow in FIG. 1, the refrigerant flowing from the refrigerant inlet 101 moves through the refrigerant flow path 121 on one end side in the plate stacking direction from the first refrigerant tank portion 13 side to the second refrigerant tank portion 14 side. After flowing, the refrigerant flows in the refrigerant flow path 121 on the other end side in the plate stacking direction from the second refrigerant tank part 14 side toward the first refrigerant tank part 13 side and flows out from the refrigerant outlet 103. That is, the stacked heat exchanger 10 is configured such that the refrigerant flow makes a U-turn once.

  Although illustration is omitted, similarly, in the central plate-like member 11C, the protruding portion 11f constituting the first cooling water tank portion 15 is closed. Thereby, the 1st cooling water tank part 15 is partitioned off into two spaces in the board lamination direction.

  Therefore, as indicated by the one-dot chain line arrow in FIG. 1, the cooling water flowing in from the cooling water inlet 104 passes through the cooling water passage 122 on the other end side in the plate stacking direction from the first cooling water tank portion 15 side to the second cooling water tank. After flowing toward the part 16 side, the coolant flows in the cooling water flow path 122 at one end side in the plate stacking direction from the second cooling water tank part 16 side toward the first cooling water tank part 15 side and flows out from the cooling water outlet 102. . That is, the stacked heat exchanger 10 is configured such that the flow of the cooling water makes a U-turn once.

  The heat exchange unit 12 is configured such that the refrigerant flow and the cooling water flow are in opposite directions (opposite flow).

  The offset fins 30 shown in FIG. 4 are arranged between the plate-like members 11. The offset fins 30 are inner fins that are interposed between the plate-like members 11 and promote heat exchange between the refrigerant and the heat medium.

  The offset fin 30 is a plate-like member in which a cut and raised portion 30a that is partially cut and raised is formed. A large number of the cut-and-raised portions 30a are formed in the direction F1 (that is, the longitudinal direction of the plate-like member 11) parallel to the refrigerant and cooling water flow directions.

  The cut and raised portions 30a adjacent to each other in the direction F1 parallel to the flow direction of the refrigerant and the cooling water are offset from each other. In the example of FIG. 4, the large number of cut-and-raised portions 30 a are staggered in a direction F <b> 1 parallel to the flow direction of the refrigerant and the cooling water.

  As a specific material of the offset fin 30, for example, a double-sided clad material in which a brazing material is clad on both sides of an aluminum core is used. The offset fins 30 are joined to both adjacent plate-like members 11 by brazing. Therefore, the offset fin 30 constitutes an internal wall that joins the adjacent plate-like members 11 and crosses the coolant channel 121 and the cooling water channel 122 in the plate stacking direction.

  As shown in FIGS. 1 and 5, a recess 41 that is recessed toward the opposite side of the outer plate member 11 </ b> A is formed on the surface of the case plate 40 that faces the outer plate member 11 </ b> A. In the present embodiment, the recess 41 is disposed at a site corresponding to the second refrigerant tank unit 14 and the second cooling water tank unit 16. And the 2nd refrigerant | coolant tank part 14 and the 2nd cooling water tank part 16 are each formed by the recessed part 41 and the protrusion part 11f.

  As shown in FIG. 5, the recessed part 41 has the cylindrical wall part 41a and the bottom wall part 41b, and is comprised. The cylindrical wall portion 41a is formed in a cylindrical shape that protrudes toward the side opposite to the outer plate-shaped member 11A. The cylindrical wall portion 41a is formed so that the inner diameter decreases toward one end in the plate stacking direction, that is, the inner diameter decreases as the distance from the outer plate-shaped member 11A increases. Further, the bottom wall portion 41b is connected to an end portion of the cylindrical wall portion 41a that is far from the outer plate-like member 11A, and forms the bottom surface of the concave portion 41. The cylindrical wall portion 41a and the bottom wall portion 41b are integrally formed.

  The first outer plate member 11 </ b> A is formed in a shape different from the other plate members 11. Hereinafter, the protruding portion 11f of the first outer plate-shaped member 11A is referred to as an outer protruding portion 110f.

  The outer protrusion 110f protrudes toward the case plate 40 side. The outer protrusion 110f is formed so that the inner diameter becomes smaller toward one end in the plate stacking direction, that is, the inner diameter becomes smaller as the case plate 40 is approached. And the outer surface of the outside protrusion part 110f and the inner surface of the recessed part 41 are joined. Specifically, the outer surface of the outer protrusion 110f and the inner surface of the cylindrical wall portion 41a of the recess 41 are joined.

  As described above, in the present embodiment, the outer surface of the outer protrusion 110 f of the first outer plate-like member 11 </ b> A disposed on the outermost side of the heat exchange unit 12 and the cylindrical wall 41 a of the recess 41 in the case plate 40. The inner surface is joined. Thereby, the pressure receiving area which receives the pressure of the coolant or the cooling water in the case plate 40 becomes equal to the passage cross-sectional area at the end of the outer protrusion 110f on one end side (case plate 40 side) in the plate stacking direction.

  Incidentally, in the comparative example shown in FIG. 6, the first outer plate-like member 11 </ b> A has the same shape as the other plate-like members 11. In this comparative example, the pressure receiving area that receives the pressure of the refrigerant or the cooling water in the case plate 40 is larger than the passage cross-sectional area at the end of the recess 41 on the other end side in the plate stacking direction (the side far from the case plate 40). . That is, in the comparative example, the pressure receiving area that receives the pressure of the refrigerant or the cooling water in the case plate 40 is significantly larger than that of the stacked heat exchanger 10 of the present embodiment.

  Therefore, in the stacked heat exchanger 10 of the present embodiment, the pressure receiving area that receives the pressure of the refrigerant or the heat medium in the case plate 40 can be reduced. Thereby, the pressure resistance of the laminated heat exchanger 10 can be improved.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. The second embodiment is different from the first embodiment in the shapes of the first outer plate-like member 11A and the case plate 40.

  As shown in FIG. 7, the outer protrusion 110 f of the first outer plate-like member 11 </ b> A in the present embodiment has an angle formed by the flat portion of the first outer plate-like member 11 </ b> A and the outer protrusion 110 f at a substantially right angle. Is formed. That is, the outer protrusion 110f is formed in a cylindrical shape having a constant inner diameter.

  The cylindrical wall portion 41a of the recess 41 in the case plate 40 is formed so that the angle formed by the flat portion of the case plate 40 and the cylindrical wall portion 41a is substantially perpendicular. That is, the cylindrical wall portion 41a is formed so that the angle formed by the bottom wall portion 41b and the cylindrical wall portion 41a is substantially a right angle. In other words, the cylindrical wall portion 41a is formed in a cylindrical shape having a constant inner diameter. And the outer surface of the outer side protrusion part 110f and the inner surface of the cylindrical wall part 41a of the recessed part 41 are joined.

  According to this embodiment, the pressure receiving area that receives the pressure of the coolant or the cooling water in the case plate 40 is equivalent to the passage cross-sectional area at the end of the outer protrusion 110f on one end side (case plate 40 side) in the plate stacking direction. Become. For this reason, since the pressure receiving area which receives the pressure of a refrigerant | coolant or a heat medium in the case plate 40 can be made small, it becomes possible to acquire the effect similar to the said 1st Embodiment.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIG. The third embodiment is different from the first embodiment in the shapes of the first outer plate-like member 11A and the case plate 40.

  As shown in FIG. 3, the outer protrusion 110 f of the first outer plate-like member 11 </ b> A in the present embodiment is an extension extending toward the radially inner side of the outer protrusion 110 f at the end close to the case plate 40. Part 11k. The extension portion 11k extends in parallel with the plane portion of the outer plate member 11A, that is, so as to be orthogonal to the plate stacking direction. And the outer surface of the extension part 11k of the outer side protrusion part 110f and the inner surface of the bottom wall part 41b of the recessed part 41 are joined.

  The outer protrusion 110f of the present embodiment is configured by a recess formed by pressing the first outer plate-like member 11A. A circular through-hole 11m is formed on a plane on the case plate 40 side of the outer protruding portion 110f, that is, on the bottom surface of the concave portion constituting the outer protruding portion 110f. And the extension part 11k is comprised by the site | part except the through-hole 11m among the planes by the side of the case plate 40 in the outer side protrusion part 110f.

  According to this embodiment, the pressure receiving area that receives the pressure of the coolant or the cooling water in the case plate 40 is equal to the passage sectional area of the through hole 11m of the outer protrusion 110f. For this reason, since the pressure receiving area which receives the pressure of a refrigerant | coolant or a heat medium in the case plate 40 can be made smaller, it becomes possible to improve the pressure | voltage resistance of the laminated heat exchanger 10 more.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and can be variously modified as follows, for example, within a range not departing from the gist of the present invention. Further, the means disclosed in each of the above embodiments may be appropriately combined within a practicable range.

  (1) In the above embodiment, the example in which the cooling water is used as the heat medium has been described, but the heat medium is not limited to this. For example, a refrigerant may be employed as the heat medium, and the heat exchange unit 12 may exchange heat between the refrigerants.

  (2) In the above embodiment, the example in which the heat exchange unit 12 is arranged so that the width direction of the refrigerant channel 121 is parallel to the direction of gravity has been described, but the arrangement direction of the heat exchange unit 12 is not limited to this. . For example, by arranging the heat exchanging unit 12 so that the plate stacking direction intersects the gravity direction, the refrigerant flow path 121 collects the liquid phase refrigerant on the lower side in the gravity direction due to the gas-liquid density difference, and the effective heat transfer surface. Can be secured.

  (3) In the above embodiment, the refrigerant flow paths 121 and the cooling water flow paths 122 are alternately stacked one by one in the plate stacking direction. For example, a plurality of refrigerant flow paths 121 and cooling water flow paths 122 are provided in the plate stacking direction. Alternatively, the layers may be alternately stacked.

  (4) In the above embodiment, the heat exchange unit 12 is configured such that the refrigerant flow and the cooling water flow make a U-turn once, but the refrigerant flow and the cooling water flow make a U-turn a plurality of times. It may be configured.

  Moreover, you may comprise the heat exchange part 12 so that the flow of a refrigerant | coolant and the flow of cooling water may not make a U-turn. In this case, you may arrange | position the heat exchange part 12 in arbitrary directions.

  (5) In the above embodiment, the heat exchange unit 12 is configured such that the refrigerant flow and the cooling water flow are in opposite directions (opposite flow), but the refrigerant flow and the cooling water flow are You may comprise so that it may become the same direction (parallel flow).

  (6) In the above embodiment, an example in which the cylindrical wall portion 41a in the protruding portion 11f of the plate-like member 11 and the concave portion 41 of the case plate 40 is formed in a cylindrical shape has been described. You may form in a cylinder shape.

DESCRIPTION OF SYMBOLS 11 Plate member 11A Outer plate member 11f Protrusion part 110f Outer protrusion part 12 Heat exchange part 40 Case plate 41 Recessed part 121 Refrigerant flow path 122 Heat medium flow path (cooling water flow path)

Claims (4)

A plurality of plate-like members (11) are formed by being stacked and joined to each other, and a heat exchange section (12) for exchanging heat between the refrigerant and the heat medium of the refrigeration cycle,
A plate-like case plate (40) joined to the heat exchange part and connected to an inflow / outflow part (21, 22) for inflowing / inflowing a refrigerant or a heat medium to / from the heat exchange part,
The heat exchange part is
A plurality of refrigerant flow paths (121) formed between the plurality of plate-like members and through which the refrigerant flows;
A plurality of heat medium passages (122) formed between the plurality of plate-like members and through which the heat medium flows;
A refrigerant tank section (14) for distributing or collecting refrigerant to the plurality of refrigerant flow paths;
A heat medium tank section (16) for distributing or collecting the heat medium to the plurality of heat medium flow paths,
The refrigerant flow path and the heat medium flow path are alternately arranged in the stacking direction of the plurality of plate-like members,
The plate-like member is formed with a cylindrical protrusion (11f) that protrudes toward one side or the other side of the stacking direction,
Of the plurality of plate-like members, a plate-like member disposed on the outermost side in the stacking direction is an outer plate-like member (11A),
When the protrusion of the outer plate-shaped member is an outer protrusion (110f),
The outer plate member is joined to the case plate,
On the surface of the case plate that faces the outer plate member, a recess (41) that is recessed toward the opposite side of the outer plate member is formed,
The refrigerant tank portion or the heat medium tank portion is formed by the protrusion and the recess,
The outer protrusion protrudes toward the case plate side,
A stacked heat exchanger in which an outer surface of the outer protrusion and an inner surface of the recess are joined. The recess is
A cylindrical wall (41a) formed in a cylindrical shape;
The cylindrical wall portion has a bottom wall portion (41b) that is connected to an end portion on the side far from the outer plate-shaped member and forms the bottom surface of the concave portion,
The laminated heat exchanger according to claim 1, wherein an outer surface of the outer protruding portion and an inner surface of the cylindrical wall portion are joined. The outer protrusion is formed such that the inner diameter becomes smaller as it approaches the case plate,
The stacked heat exchanger according to claim 2, wherein the cylindrical wall portion is formed so that an inner diameter becomes smaller as the distance from the outer plate-shaped member increases. The outer protrusion has an extension (11k) extending toward the radially inner side of the outer protrusion at an end near the case plate,
The laminated heat exchanger according to claim 1, wherein an outer surface of the extension portion and an inner surface of the recess are joined.

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