WO2020022058A1 - Heat exchanger - Google Patents

Abstract

A heat exchanger (10) is provided with a condensation section (20), a gas-liquid separator (40), and a sub-cool section (30). Each of the condensation section and the sub-cool section has a plurality of plate-shaped members (210, 220, 230, 310, 320, 330) which are stacked in a stacking direction. First flow passages (FP1) through which a refrigerant flows and second flow passages (FP2) through which cooling water flows are configured so as to be alternately arranged in the stacking direction. The condensation section and the sub-cool section are arranged so as to be adjacent to each other in the stacking direction. A guide flow passage (FP3) through which a refrigerant having flowed through the condensation section is guided to the gas-liquid separator is formed so as to extend through each of the plate-shaped members (310, 320, 330) of the sub-cool section.

Description

Heat exchanger Cross-reference of related applications

This application is based on Japanese Patent Application No. 2018-139149 filed on July 25, 2018 and claims the benefit of its priority, and all contents of the patent application are Incorporated herein by reference.

The present disclosure relates to a heat exchanger that performs heat exchange between a refrigerant and cooling water.

For example, a vehicle air conditioner is provided with a condenser that is a part of a refrigeration cycle. In the condenser, heat is released from the refrigerant by heat exchange with air or the like, and the refrigerant changes from a gas phase to a liquid phase. In recent years, the condenser is often configured to perform heat exchange between the refrigerant and the cooling water so that heat is radiated from the refrigerant more efficiently.

By the way, the heat exchanger used as a condenser has a gas-liquid separator for separating gas-liquid of the refrigerant after heat radiation, and a subcooler for further cooling the liquid-phase refrigerant discharged from the gas-liquid separator. And a unit may be provided. In such a heat exchanger, the condensing part for condensing the refrigerant and the subcool part are arranged so as to be adjacent to each other.

Patent Document 1 below describes that in a heat exchanger configured by stacking a plurality of plate members, each plate member is disposed so as to straddle both a condensing portion and a subcool portion. I have. In the heat exchanger described in Patent Literature 1 below, the condensing section and the subcool section are arranged in a direction perpendicular to the laminating direction of the plate members.

Further, Patent Literature 2 below describes that, among a plurality of stacked plate members, a condensing portion is formed by some of the plate members, and a condensing portion is formed by the remaining plate members. . In the heat exchanger described in Patent Literature 2 below, the condensing section and the subcool section are arranged in the same direction as the laminating direction of the plate members.

U.S. Patent Application Publication No. 2015/0323231 US Patent Application Publication No. 2015/0226469

In view of the manufacturing cost of the heat exchanger, it is preferable that at least a part of the plate-like member can be shared between the heat exchanger of the type provided with the subcool portion and the heat exchanger of the type not provided with the subcool portion. . However, in the heat exchanger described in Patent Literature 1, all the plate-like members have an opening or the like dedicated to the subcool portion in a part thereof. For this reason, the plate-shaped member cannot be shared with the heat exchanger of the type in which the subcool portion is not provided as described above.

On the other hand, in the heat exchanger described in Patent Literature 2, the plurality of plate members are divided into a plate member that forms a condensing unit and a plate member that forms a subcool unit. For this reason, at least the plate-like member constituting the condensing section can be shared with a heat exchanger of a type in which the subcool section is not provided.

However, in the heat exchanger described in Patent Literature 2, the condenser and the gas-liquid separator are connected by a pipe or the like, and the subcooler and the gas-liquid separator are also connected by a pipe or the like. There is a need. For this reason, no matter where the gas-liquid separator is arranged, it is necessary to route a relatively long pipe at least at one connection portion. As a result, there is a problem that the physique of the entire heat exchanger increases.

The present disclosure makes it possible to share some parts with a heat exchanger of a type in which a subcool portion is not provided, while suppressing an increase in physique due to pipe routing. , To provide.

The heat exchanger according to the present disclosure is a heat exchanger that performs heat exchange between the refrigerant and the cooling water, a condensing unit that cools and condenses the gas-phase refrigerant with the cooling water, and after passing through the condensing unit. And a sub-cooling unit that receives the refrigerant and discharges the liquid-phase refrigerant from the refrigerant, and further cools the liquid-phase refrigerant discharged from the gas-liquid separator with cooling water. Each of the condensing section and the subcooling section has a plurality of plate-like members laminated along the laminating direction, and a first flow path through which the refrigerant flows and a second flow path through which the cooling water flows are laminated. It is configured to be alternately arranged along the direction. Furthermore, the condensing part and the subcool part are arranged so as to be adjacent to each other along the laminating direction. In this heat exchanger, a guide channel for guiding the refrigerant after passing through the condensing section to the gas-liquid separator is formed so as to penetrate each plate-shaped member of the subcool section.

In the heat exchanger having such a configuration, the condensing portion and the subcool portion are arranged so as to be adjacent to each other along the stacking direction in which the plate-shaped members are stacked. For this reason, the plate-shaped member constituting the condensing portion can be shared with a type of heat exchanger in which the subcool portion is not provided.

{Circle around (2)} A guide channel for guiding the refrigerant after passing through the condensing section to the gas-liquid separator is formed to penetrate each plate-shaped member of the subcool section. For this reason, for example, if the gas-liquid separator is arranged at a position adjacent to the subcool unit, both the connection between the condenser and the gas-liquid separator and the connection between the subcool unit and the gas-liquid separator Can be performed by a short pipe or the like. As a result, an increase in the physique due to the routing of the piping is suppressed.

According to the present disclosure, while it is possible to share some components with a heat exchanger of a type in which a subcool unit is not provided, it is possible to suppress an increase in physique due to the routing of piping. An exchanger is provided.

FIG. 1 is a diagram illustrating the overall configuration of the heat exchanger according to the first embodiment. FIG. 2 is a diagram schematically illustrating a flow path of a refrigerant in the heat exchanger according to the first embodiment. FIG. 3 is a diagram schematically illustrating a flow path of cooling water in the heat exchanger according to the first embodiment. FIG. 4 is an exploded view for explaining the configuration of the heat exchanger. FIG. 5 is a cross-sectional view schematically showing a VV cross section in FIG. FIG. 6 is a diagram illustrating shapes of fins arranged in the first flow path and the second flow path. FIG. 7 is a diagram illustrating shapes of fins arranged in the first flow path and the second flow path. FIG. 8 is a diagram schematically illustrating a flow path of a refrigerant in the heat exchanger according to the second embodiment. FIG. 9 is a diagram schematically illustrating a flow path of cooling water in the heat exchanger according to the third embodiment.

Hereinafter, the present embodiment will be described with reference to the accompanying drawings. To facilitate understanding of the description, the same components are denoted by the same reference numerals as much as possible in each drawing, and redundant description will be omitted.

The first embodiment will be described. The heat exchanger 10 according to the present embodiment is a part of an air conditioner mounted on a vehicle (not shown) and is used as a condenser in a refrigeration cycle. In the present embodiment, the heat exchanger 10 is configured as a water-cooled condenser. That is, in the heat exchanger 10, heat exchange is performed between the cooling water and the gas-phase refrigerant.

FIG. 1 schematically shows the entire configuration of the heat exchanger 10. As shown in FIG. 1, the heat exchanger 10 includes a condenser 20, a gas-liquid separator 40, and a subcooler 30. As will be described later with reference to FIG. 4 and the like, the condensing section 20 and the subcool section 30 are configured by laminating a plurality of plate-like members (310 and the like), but in FIG. Illustration of these plate members is omitted.

The condensing section 20 is a section that cools and condenses a gas-phase refrigerant with cooling water. As will be described later, a plate-like member is provided inside the condensing section 20 with a first flow path FP1 as a flow path through which a refrigerant flows and a second flow path FP2 as a flow path through which cooling water flows. Are formed so as to be alternately arranged along the direction in which they are located. In the condensing section 20, heat exchange is performed between the gas-phase refrigerant flowing through the first flow path FP1 and the cooling water flowing through the second flow path FP2. The refrigerant is cooled and condensed by the heat exchange, and changes from a gas phase to a liquid phase.

The condenser unit 20 is provided with a refrigerant supply unit 21, a cooling water supply unit 22, and a cooling water discharge unit 23. The refrigerant supply unit 21 is a part that receives a gas-phase refrigerant supplied from the outside. The cooling water supply unit 22 is a part that receives cooling water supplied from the outside. The cooling water discharge part 23 is a part that discharges the cooling water that has been subjected to the heat exchange to the outside.

The gas-liquid separator 40 is a container for receiving the refrigerant after passing through the condenser 20 and discharging the liquid-phase refrigerant among the refrigerant. The gas-liquid separator 40 is arranged at a position adjacent to the subcool unit 30. Specifically, it is arranged at a position opposite to the condensing unit 20 with the subcool unit 30 interposed therebetween.

As will be described later, the refrigerant after passing through the condensing section 20 passes through a guide flow path FP3 (not shown in FIG. 1, see FIG. 5) formed to penetrate the subcool section 30, and the gas-liquid separator. 40. The refrigerant is in a state in which a gas-phase refrigerant and a liquid-phase refrigerant are mixed. In the gas-liquid separator 40, gas-liquid of the refrigerant is separated, and only the liquid-phase refrigerant is discharged and supplied to the subcool unit 30.

The subcool unit 30 is a part that further cools the liquid-phase refrigerant discharged from the gas-liquid separator 40 with the cooling water as described above. By providing the subcool unit 30, the degree of supercooling of the refrigerant discharged from the heat exchanger 10 is ensured.

As will be described later, a first flow path FP1 which is a flow path for a refrigerant and a second flow path FP2 which is a flow path for a cooling water are provided inside the subcool part 30 in the same manner as the above-described condensing part 20. Are formed so as to be alternately arranged along the direction in which the plate members are stacked. In the subcool unit 30, heat exchange is performed between the liquid-phase refrigerant flowing through the first flow path FP1 and the cooling water flowing through the second flow path FP2. The subcool unit 30 is provided with a refrigerant discharge unit 31. The refrigerant discharge part 31 is a part that discharges the refrigerant having a higher degree of supercooling through the subcool part 30 to the outside.

経 路 A route of the refrigerant in the heat exchanger 10 will be described with reference to FIG. FIG. 3 shows a state in which the condensing section 20, the subcooling section 30, and the gas-liquid separator 40 are arranged apart from each other for convenience of explanation. The flow of the refrigerant in each part is indicated by a plurality of arrows A10 and the like.

凝縮 As shown in FIG. 4, the condensing section 20 is formed by stacking a plurality of plate members (210, 220, 230) along a certain direction. The direction in which the plate members 210 and the like are stacked is the same as the direction in which the condensing section 20 and the subcool section 30 are arranged. Hereinafter, the direction is also referred to as a “stacking direction”.

矢 印 The arrow A10 shown in FIG. 2 indicates the flow of the refrigerant flowing from the refrigerant supply unit 21 to the inside of the condensation unit 20. After passing through the coolant supply unit 21, the coolant flows through the respective plate-like members 210 and the like along the stacking direction, and is distributed to the respective first flow paths FP <b> 1 formed in the condensing unit 20. To go. In order to realize the flow of the refrigerant as indicated by arrow A10, openings 215 and the like (see FIG. 4) are formed in each of the plate members 210 and the like included in the condensing section 20.

Arrows A11 to A15 indicate the flow of the refrigerant after being distributed to the respective first flow paths FP1 in the condenser 20. The first flow path FP1 is a flow path formed between the plate members 210 and the like adjacent to each other. Although each of the first flow paths FP1 is formed as a substantially flat space, in FIG. 2, the flow of the refrigerant flowing through the first flow path FP1 is shown as a linear arrow A11 or the like. I have. In FIG. 2, the flow of the refrigerant in each first flow path FP1 is indicated by five arrows A11 and the like, but the number of the first flow paths FP1 formed in the condensing section 20 is different from this. May be different.

(4) The refrigerant flowing through each first flow path FP1 in the condensing section 20 merges again and flows so as to penetrate the respective plate-like members 210 and the like along the laminating direction. In FIG. 2, such a flow of the refrigerant is indicated by an arrow A16. The refrigerant flows toward the subcool unit 30 along the arrow A16. In order to realize the flow of the refrigerant as indicated by the arrow A16, openings 211 and the like (see FIG. 4) are formed in each of the plate-like members 210 and the like included in the condensing section 20.

The refrigerant reaches the subcool section 30 while flowing along the arrow A16, and is then supplied to the gas-liquid separator 40 through the guide flow path FP3 (see FIG. 5) formed to penetrate the subcool section 30. You. In FIG. 2, such a flow of the refrigerant is indicated by an arrow A17.

The guide channel FP3 is not connected to the first channel FP1 formed in the subcool unit 30. Therefore, the refrigerant that has reached the subcool unit 30 along the arrow A16 is supplied to the gas-liquid separator 40 along the arrow A17 without being subjected to any heat exchange in the subcool unit 30.

The subcool unit 30 is also formed by laminating a plurality of plate members (310, 320, 330) along the laminating direction, similarly to the condensing unit 20 described above. The arrow A18 shown in FIG. 2 indicates the flow of the liquid-phase refrigerant flowing into the subcool unit 30 after being discharged from the gas-liquid separator 40. The refrigerant is distributed to the respective first flow paths FP1 formed in the subcool unit 30 while flowing so as to penetrate the respective plate members 310 and the like along the laminating direction. In order to realize the flow of the refrigerant as indicated by the arrow A18, openings 313 and the like (see FIG. 4) are formed in each of the plate members 310 and the like of the subcool unit 30.

Arrows A19 to A21 indicate the flow of the refrigerant after being distributed to the respective first flow paths FP1 in the subcool unit 30. The first flow path FP1 is a flow path formed between the plate members 310 and the like adjacent to each other. Although each of the first flow paths FP1 is formed as a substantially flat space, in FIG. 2, the flow of the refrigerant flowing through the first flow path FP1 is shown as a linear arrow A19 or the like. I have. In FIG. 2, the flow of the refrigerant in each of the first flow paths FP1 is indicated by three arrows A19 and the like, but the number of the first flow paths FP1 formed in the subcool unit 30 is May be different.

(4) The refrigerant flowing through each first flow path FP1 in the subcool unit 30 merges again and flows so as to penetrate the respective plate members 310 and the like along the laminating direction. In FIG. 2, such a flow of the refrigerant is indicated by an arrow A22. After flowing toward the refrigerant discharge portion 31 along the arrow A22, the refrigerant is directly discharged from the refrigerant discharge portion 31 to the outside. In order to realize the flow of the refrigerant as indicated by arrow A22, openings 315 and the like (see FIG. 4) are formed in each plate-like member 310 and the like of the subcool unit 30.

経 路 A description will be given of a path through which the cooling water flows in the heat exchanger 10 with reference to FIG. FIG. 3 also shows a state in which the condensing section 20, the subcooling section 30, and the gas-liquid separator 40 are arranged separately from each other, as in FIG. The flow of the cooling water in each part is indicated by a plurality of arrows A30 and the like.

矢 印 The arrow A30 shown in FIG. 3 indicates the flow of the cooling water flowing from the cooling water supply unit 22 to the inside of the condensation unit 20. After passing through the cooling water supply unit 22, the cooling water flows through the respective plate-like members 210 and the like along the stacking direction, and flows to the respective second flow paths FP <b> 2 formed in the condenser unit 20. Will be distributed. In order to realize the flow of the cooling water as indicated by the arrow A30, openings 212 and the like (see FIG. 4) are formed in the respective plate-like members 210 and the like included in the condensing section 20.

Arrows A31 to A34 indicate the flow of the cooling water after being distributed to the respective second flow paths FP2 in the condenser 20. The second flow path FP2 is a flow path formed between the adjacent plate members 210 and the like, like the first flow path FP1 described above. Although each of the second flow paths FP2 is formed as a substantially flat space, the flow of the cooling water flowing through the second flow path FP2 is shown as a linear arrow A31 or the like in FIG. ing. In FIG. 3, the flow of the cooling water in each of the second flow paths FP2 is indicated by four arrows A31 and the like, but the number of the second flow paths FP2 formed in the condensing section 20 is And may be different.

(4) The cooling water that has flowed through each of the second flow paths FP2 in the condensing section 20 merges again and flows so as to penetrate the respective plate members 210 and the like along the laminating direction. In FIG. 3, such a flow of the cooling water is indicated by an arrow A40. The cooling water flows toward the cooling water discharge unit 23 along the arrow A40, and is then discharged from the cooling water discharge unit 23 to the outside. In order to realize the flow of the cooling water as indicated by the arrow A40, openings 214 and the like (see FIG. 4) are formed in the respective plate-like members 210 and the like included in the condensing unit 20.

Of the cooling water flowing along the arrow A30, the cooling water that has not been distributed to the second flow path FP2 of the condensing section 20 as described above reaches the subcool section 30, and the cooling water of the subcool section 30 along the laminating direction as it is. Flows into the interior. An arrow A35 shown in FIG. 3 indicates a flow of the cooling water flowing from the condensing unit 20 into the subcool unit 30.

(4) The cooling water is distributed to the respective second flow paths FP2 formed in the subcool unit 30 while flowing so as to penetrate the respective plate members 310 and the like in the laminating direction. In order to realize the flow of the cooling water as indicated by the arrow A35, openings 312 and the like (see FIG. 4) are formed in the respective plate-like members 210 and the like of the condensing section 20.

Arrows A36 to A38 indicate the flow of the cooling water after being distributed to the respective second flow paths FP2 in the subcool unit 30. The second flow path FP2, like the first flow path FP1, is a flow path formed between the adjacent plate members 310 and the like. Although each of the second flow paths FP2 is formed as a substantially flat space, in FIG. 3, the flow of the cooling water flowing through the second flow path FP2 is indicated by a linear arrow A36 or the like. ing. In FIG. 3, the flow of the cooling water in each of the second flow paths FP2 is indicated by three arrows A36 and the like, but the number of the second flow paths FP2 formed in the subcool portion 30 is And may be different.

(4) The cooling water that has flowed through each of the second flow paths FP2 in the subcool unit 30 merges again and flows so as to penetrate the respective plate members 310 and the like along the laminating direction. In FIG. 3, such a flow of the cooling water is indicated by an arrow A39. In order to realize the flow of the cooling water as indicated by the arrow A39, openings 314 and the like (see FIG. 4) are formed in each of the plate members 310 and the like of the subcool unit 30.

(4) The cooling water flows toward the condenser 20 along the arrow A39, and then flows into the condenser 20 again. The cooling water flowing along the arrow A39 joins the cooling water flowing along the arrow A40 described above, and is discharged from the cooling water discharge unit 23 to the outside.

具体 A specific configuration of the heat exchanger 10 for realizing the respective flows of the refrigerant and the cooling water as described above will be described with reference to FIGS. 4 and 5. FIG. 4 shows an exploded view of the configuration of the condenser section 20 and the subcool section 30 in the heat exchanger 10 where a plurality of plate members are stacked. FIG. 5 shows the condensing section 20 and the subcooling section 30 cut at the position VV shown in FIG. 4, and shows the cross section viewed from below. In order to make the configuration easy to understand, FIG. 5 illustrates an example in which the number of laminated plate members is smaller than the actual number. In addition, in the figure, illustration of the plate-like member 230 shown in FIG. 4 is omitted.

First, the configuration of the condenser 20 will be described. As shown in FIG. 4, the condensing section 20 is configured by three types of plate-like members including plate- like members 210, 220, and 230. Of these, only one plate member 230 is disposed at a position on the opposite end to the subcool unit 30. On the other hand, a plurality of plate-like members 210 and plate-like members 220 are arranged, and inside the plate-like members 230, they are arranged so as to be alternately arranged in the laminating direction. Each of the plate- like members 210, 220, and 230 has a substantially rectangular shape when viewed along the laminating direction.

冷媒 The plate-like member 230 is provided with the above-described coolant supply part 21, cooling water supply part 22, and cooling water discharge part 23. Each of them is formed so as to extend outward from the edge of the circular opening penetrating the main surface of the plate-like member 230 along the laminating direction, that is, toward the side opposite to the subcool portion 30. When viewed from the outside (the right side in FIG. 4) along the stacking direction, the coolant supply unit 21 is formed at a position near the upper right corner of the plate member 230. Further, the cooling water supply unit 22 is formed at a position near the lower side and the right corner of the plate member 230, and the cooling water discharge unit 23 is formed at the upper side and the left corner of the plate member 230. It is formed at a position close to it.

接合 A bonded portion 236 is formed on the outer peripheral side of the plate-like member 230. The joined portion 236 is formed so as to extend outward (to the right in FIG. 4) along the laminating direction from the entire outer peripheral edge of the plate member 230. For this reason, the shape of the plate-like member 230 is cup-shaped.

The plate member 210 has four openings 211, 212, 214, and 215 formed therein. These are all circular openings, and are formed so as to penetrate the main surface of the plate-like member 210.

開口 When viewed from the plate member 230 side along the stacking direction, the opening 211 is formed at a position on the lower side and near the left corner of the plate member 210. The opening 211 is formed as a hole for realizing the flow of the refrigerant as indicated by an arrow A16 in FIG.

開口 When viewed from the plate member 230 side along the stacking direction, the opening 212 is formed at a position in the plate member 210 near the lower right corner. This position is a position that overlaps with the cooling water supply unit 22 of the plate member 230 when viewed along the stacking direction. The opening 212 is formed as a hole for realizing the flow of the cooling water as indicated by an arrow A30 in FIG.

開口 When viewed from the plate member 230 side along the stacking direction, the opening 214 is formed in a position near the upper left corner of the plate member 210. The position is a position that overlaps with the cooling water discharge portion 23 of the plate member 230 when viewed along the stacking direction. The opening 214 is formed as a hole for realizing the flow of the cooling water as indicated by an arrow A40 in FIG.

開口 When viewed from the plate member 230 side along the laminating direction, the opening 215 is formed at a position near the upper right corner of the plate member 210. The position is a position that overlaps with the coolant supply unit 21 of the plate member 230 when viewed along the stacking direction. The opening 215 is formed as a hole for realizing the flow of the refrigerant as indicated by an arrow A10 in FIG.

部 A portion to be joined 216 is formed on the outer peripheral side of the plate member 210. The joined portion 216 is formed to extend in the same direction as the joined portion 236 of the plate member 230 along the laminating direction from the entire outer peripheral edge of the plate member 210. For this reason, the shape of the plate member 210 is a cup shape similar to the plate member 230.

The plate member 220 has four openings 221, 222, 224, and 225 formed therein. These are all circular openings and are formed so as to penetrate the main surface of the plate-like member 220.

開口 When viewed from the plate member 230 side along the stacking direction, the opening 221 is formed at a position on the lower side and near the left corner of the plate member 220. The opening 221 is formed as a hole for realizing the flow of the refrigerant as indicated by an arrow A16 in FIG.

開口 When viewed from the plate member 230 side along the stacking direction, the opening 222 is formed at a position near the lower right side corner of the plate member 220. This position is a position that overlaps with the cooling water supply unit 22 of the plate member 230 when viewed along the stacking direction. The opening 222 is formed as a hole for realizing the flow of the cooling water as indicated by an arrow A30 in FIG.

開口 When viewed from the plate member 230 side along the stacking direction, the opening 224 is formed at a position near the upper left side corner of the plate member 220. The position is a position that overlaps with the cooling water discharge portion 23 of the plate member 230 when viewed along the stacking direction. The opening 224 is formed as a hole for realizing the flow of the cooling water as indicated by an arrow A40 in FIG.

開口 When viewed from the plate member 230 side along the stacking direction, the opening 225 is formed at a position near the upper right side corner of the plate member 220. The position is a position that overlaps with the coolant supply unit 21 of the plate member 230 when viewed along the stacking direction. The opening 225 is formed as a hole for realizing the flow of the refrigerant as indicated by an arrow A10 in FIG.

接合 A joint 226 is formed on the outer peripheral side of the plate-like member 220. The joined portion 226 is formed to extend in the same direction as the joined portion 236 of the plate member 230 along the laminating direction from the entire outer peripheral edge of the plate member 220. For this reason, the shape of the plate member 220 is a cup shape similar to the plate member 230.

板 A plate member 110 is disposed at a position between the condensing section 20 and the subcool section 30. The shape of the plate-like member 110 when viewed along the stacking direction is substantially equal to the shape of the plate-like member 220 and the like. The plate member 110 has three openings 111, 112, and 114 formed therein. These are all circular openings and are formed so as to penetrate the main surface of the plate-like member 110.

開口 When viewed from the plate member 230 side along the stacking direction, the opening 111 is formed at a position on the lower side and near the left corner of the plate member 110. The opening 111 is formed as a hole for realizing the flow of the refrigerant as indicated by an arrow A16 in FIG. The refrigerant that has passed through the condensing section 20 passes through the opening 111 and flows into the guide flow path FP3 formed in the subcool section 30.

開口 When viewed from the plate member 230 side along the laminating direction, the opening 112 is formed at a position near the lower right corner of the plate member 110. This position is a position that overlaps with the cooling water supply unit 22 of the plate member 230 when viewed along the stacking direction. The opening 112 is formed as a hole for realizing the flow of the cooling water as indicated by an arrow A30 in FIG.

開口 When viewed from the plate member 230 side along the stacking direction, the opening 114 is formed at a position near the upper left side corner of the plate member 110. The position is a position that overlaps with the cooling water discharge portion 23 of the plate member 230 when viewed along the stacking direction. The opening 114 is formed as a hole for realizing the flow of the cooling water as indicated by arrows A39 and A40 in FIG.

When viewed from the plate member 230 side along the laminating direction, a circular protrusion 115 protruding toward the plate member 230 side is formed in a portion of the plate member 110 that overlaps with the coolant supply unit 21. ing. An opening is not formed at the tip of the protruding portion 115 and is closed. In the plate-like member 110, a circular projection 113 protruding toward the plate-like member 230 is formed at a portion overlapping the opening 313 of the plate-like member 310 along the above-described direction. Like the protruding portion 115, an opening is not formed at the tip of the protruding portion 113 and is closed.

部 A portion to be joined 116 is formed on the outer peripheral side of the plate member 110. The joined portion 116 is formed to extend in the same direction as the joined portion 236 of the plate member 230 along the laminating direction from the entire outer peripheral edge of the plate member 110. For this reason, the shape of the plate member 110 is a cup shape similar to the plate member 230.

As described above, the condensing unit 20 has a configuration in which a plurality of the plate members 210 and the plate members 220 are alternately arranged between the plate members 110 and the plate members 230. 4 and 5, only one plate-like member 210 and one plate-like member 220 are illustrated, but actually more plate-like members 210 and plate-like members 220 are used. Are located. In FIG. 5, illustration of the plate member 230 is omitted.

(5) The plurality of plate members 210 and the like included in the condensing unit 20 are stacked along the stacking direction as shown in FIG. Each plate-like member (210 etc.) is water-tightly brazed at the abutting portion in a state where the to-be-joined portions (216 etc.) abut each other.

２A second flow path FP2 through which the cooling water passes is formed between the plate member 110 and the plate member 210 adjacent thereto. In addition, a first flow path FP1 through which the refrigerant passes is formed between the plate-like member 220 and the plate-like member 210 adjacent thereto. Thereafter, similarly, the first flow paths FP1 and the second flow paths FP2 are alternately arranged along the laminating direction between the adjacent plate members 210 and the like.

The flow path through which the refrigerant passes through the openings 215, 225, and the like, that is, the flow path through which the refrigerant flows along the arrow A10 in FIG. 2 is connected to each of the first flow paths FP1 formed in the condensing section 20. Similarly, the flow path through which the refrigerant passes through the opening 211 and the opening 221, that is, the flow path through which the refrigerant flows along the arrow A16 in FIG. 2 is also communicated with each of the first flow paths FP1 formed in the condensing section 20. ing.

The flow path through which the cooling water flows through the opening 212, the opening 222, and the like, that is, the flow path through which the cooling water flows along the arrow A30 in FIG. 3 is communicated with each of the second flow paths FP2 formed in the condensing section 20. I have. Similarly, the flow path through which the cooling water flows through the opening 214 and the opening 224, that is, the flow path through which the cooling water flows along the arrow A40 in FIG. Are in communication.

As shown in FIG. 5, a partition wall 215A is formed in the plate member 210 so as to extend from the edge of the opening 215 toward the plate member 110. Further, a partition wall 225 </ b> A is formed on the plate member 220 so as to extend from the edge of the opening 225 toward the plate member 230. The partition wall 225A is fitted inside the adjacent partition wall 215A on the plate-like member 230 side, and the two are water-tightly brazed. This configuration prevents the refrigerant flowing along the arrow A10 in FIG. 2 from flowing into the second flow path FP2 of the condenser 20. The protruding portion 115 formed on the plate-like member 110 is fitted inside a partition wall 215A formed on the plate-like member 210 adjacent to the plate-like member 110. Have been.

A partition wall 211A is formed on the plate member 210 so as to extend from the edge of the opening 211 toward the plate member 110. Further, a partition wall 221A is formed on the plate member 220 so as to extend from the edge of the opening 221 toward the plate member 230. The partition wall 221A is fitted inside the adjacent partition wall 211A on the plate-like member 230 side, and the two are water-tightly brazed. With such a configuration, the refrigerant flowing along the arrow A16 in FIG. 2 is prevented from flowing into the second flow path FP2 of the condenser 20. The plate member 110 is formed with a partition wall 111A extending from the edge of the opening 111 toward the plate member 230. A partition wall 111A formed on the plate-like member 110 is fitted inside a partition wall 211A formed on the plate-like member 210 adjacent to the plate-like member 110, and the two are water-tightly brazed. I have.

As shown in FIG. 5, the entire periphery is formed between the edge of the opening 212 formed in the plate member 210 and the edge of the opening 222 formed in the adjacent plate member 220 on the plate member 230 side. Are abutted over and brazed watertight. This configuration prevents the cooling water flowing along the arrow A30 in FIG. 3 from flowing into the first flow path FP1 of the condenser 20.

In the same manner as described above, the gap between the edge of the opening 214 formed in the plate member 210 and the edge of the opening 224 formed in the adjacent plate member 220 on the plate member 230 side extends over the entire circumference. It is in contact and brazed watertight. With such a configuration, the cooling water flowing along the arrow A40 in FIG. 3 is prevented from flowing into the first flow path FP1 of the condenser 20.

Next, the configuration of the subcool unit 30 will be described. As shown in FIG. 4, the subcool unit 30 is configured by three types of plate members including plate members 310, 320, and 330. Among them, only one plate-shaped member 330 is disposed at a position that is an end on the opposite side to the condensing section 20. On the other hand, a plurality of plate-like members 310 and plate-like members 320 are all arranged, and between the plate-like members 330 and the plate-like members 110, these are arranged so as to be alternately arranged along the laminating direction. . Each of the plate members 310, 320, and 330 has a substantially rectangular shape when viewed along the stacking direction.

冷媒 The above-described refrigerant discharge portion 31 is formed in the plate member 330. The refrigerant discharge portion 31 is formed to extend from the edge of the circular opening 335 passing through the main surface of the plate-shaped member 330 to the outside in the stacking direction, that is, to the side opposite to the condensing portion 20. When viewed from the condensing part 20 side, the refrigerant discharge part 31 and the opening 335 are formed in a position near the upper right corner of the plate-shaped member 330. This position is a position that overlaps with the coolant supply unit 21, the opening 215, and the like.

開口 The plate member 330 is further formed with an opening 331 and an opening 333. When viewed from the condenser section 20 side in the stacking direction, the opening 331 is formed at a position on the lower side and near the left corner of the plate member 330. The position is a position that overlaps with the opening 211 of the plate member 210 when viewed along the stacking direction. The opening 331 is formed as a hole for realizing the flow of the refrigerant as indicated by an arrow A17 in FIG. That is, the opening 331 is a part of the guide channel FP3. The opening 331 is a hole for discharging the refrigerant passing through the guide flow path FP3 toward the gas-liquid separator 40, and thus corresponds to one of the “discharge holes” in the present embodiment.

筒 As shown in FIG. 5, the plate-shaped member 330 is formed with a cylindrical protrusion 331A extending from the edge of the opening 331 toward the gas-liquid separator 40. The tip of the protrusion 331A is connected to the gas-liquid separator 40. The inside of the protrusion 331A and the internal space of the gas-liquid separator 40 are communicated.

(4) When viewed from the condenser section 20 side in the stacking direction, the opening 333 is formed at a position on the lower side and the center in the width direction of the plate member 330. The position is a position that overlaps with an intermediate portion between the opening 211 and the opening 212 of the plate member 210 when viewed along the stacking direction. The opening 333 is formed as a hole for realizing the flow of the refrigerant as indicated by an arrow A18 in FIG. The flow path through which the refrigerant flows along arrow A18 in FIG. 2 is also referred to as “receiving flow path FP4” below. The opening 333 is a part of the receiving channel FP4. The opening 333 is a hole for receiving the liquid-phase refrigerant discharged from the gas-liquid separator 40, and thus corresponds to one of the “receiving holes” in the present embodiment.

筒 As shown in FIG. 5, the plate-shaped member 330 is formed with a cylindrical protrusion 333A extending from the edge of the opening 333 toward the gas-liquid separator 40 side. The tip of the protrusion 333A is connected to the gas-liquid separator 40. The inside of the protrusion 333A and the internal space of the gas-liquid separator 40 are communicated.

部 A joint 336 is formed on the outer peripheral side of the plate-shaped member 330. The joined portion 336 is formed so as to extend from the entire outer peripheral edge of the plate-shaped member 330 toward the condensing portion 20 along the laminating direction. For this reason, the shape of the plate-shaped member 330 is cup-shaped.

Five openings 311, 312, 313, 314, 315 are formed in the plate member 310. These are all circular openings and are formed so as to penetrate the main surface of the plate-like member 310.

開口 When viewed from the condenser section 20 side in the stacking direction, the opening 311 is formed at a position on the lower side and near the left corner of the plate member 310. The position is a position that overlaps with the opening 211 of the plate member 210 when viewed along the stacking direction. The opening 311 is formed as a hole for realizing the flow of the refrigerant as indicated by an arrow A17 in FIG. That is, the opening 311 is a part of the guide channel FP3. The opening 311 is a hole for discharging the refrigerant passing through the guide channel FP3 toward the gas-liquid separator 40, and thus corresponds to one of the “discharge holes” in the present embodiment.

The opening 312 is formed at a position near the lower right side corner of the plate member 310 when viewed from the condenser section 20 side along the stacking direction. This position is a position that overlaps with the cooling water supply unit 22 of the plate member 230 when viewed along the stacking direction. The opening 312 is formed as a hole for realizing the flow of the cooling water as indicated by an arrow A35 in FIG.

The opening 313 is formed in the plate member 310 at a position below and in the center in the width direction of the plate-like member 310 when viewed from the condenser section 20 side in the stacking direction. This position is a position that overlaps with the opening 333 of the plate member 330 when viewed along the stacking direction. The opening 313 is formed as a hole for realizing the flow of the cooling water as indicated by an arrow A18 in FIG. That is, the opening 313 is a part of the guide channel FP4. The opening 313 is a hole for receiving the liquid-phase refrigerant discharged from the gas-liquid separator 40, and thus corresponds to one of the “receiving holes” in the present embodiment.

The opening 314 is formed in the plate-shaped member 310 at a position near the upper and left corner of the plate member 310 when viewed from the condenser section 20 side in the stacking direction. The position is a position that overlaps with the cooling water discharge portion 23 of the plate member 230 when viewed along the stacking direction. The opening 314 is formed as a hole for realizing the flow of the cooling water as indicated by an arrow A39 in FIG.

The opening 315 is formed at a position near the upper right corner of the plate member 310 when viewed from the condenser section 20 side in the stacking direction. The position is a position that overlaps with the coolant supply unit 21 of the plate member 230 when viewed along the stacking direction. The opening 315 is formed as a hole for realizing the flow of the refrigerant as indicated by an arrow A22 in FIG.

接合 A joint 316 is formed on the outer peripheral side of the plate member 310. The joined portion 316 is formed to extend in the same direction as the joined portion 336 of the plate member 330 along the laminating direction from the entire outer peripheral edge of the plate member 310. For this reason, the shape of the plate member 310 is a cup shape similar to the plate member 330.

Five openings 321, 322, 323, 324, 325 are formed in the plate member 320. These are all circular openings and are formed so as to penetrate the main surface of the plate-like member 320.

開口 When viewed from the condenser section 20 side in the stacking direction, the opening 321 is formed at a position on the lower side and near the left corner of the plate member 320. The position is a position that overlaps with the opening 211 of the plate member 210 when viewed along the stacking direction. The opening 321 is formed as a hole for realizing the flow of the refrigerant as indicated by an arrow A17 in FIG. That is, the opening 321 is a part of the guide channel FP3. The opening 321 is a hole for discharging the refrigerant passing through the guide flow path FP3 toward the gas-liquid separator 40, and thus corresponds to one of the “discharge holes” in the present embodiment.

開口 When viewed from the condenser section 20 side in the stacking direction, the opening 322 is formed at a position near the lower right side corner of the plate member 320. This position is a position that overlaps with the cooling water supply unit 22 of the plate member 230 when viewed along the stacking direction. The opening 322 is formed as a hole for realizing the flow of the cooling water as indicated by an arrow A35 in FIG.

開口 When viewed from the condenser section 20 side in the stacking direction, the opening 323 is formed at a position on the lower side and the center in the width direction of the plate member 320. This position is a position that overlaps with the opening 333 of the plate member 330 when viewed along the stacking direction. The opening 323 is formed as a hole for realizing the flow of the cooling water as indicated by an arrow A18 in FIG. That is, the opening 323 is a part of the guide channel FP4. The opening 323 is a hole for receiving the liquid-phase refrigerant discharged from the gas-liquid separator 40, and thus corresponds to one of the “receiving holes” in the present embodiment.

(4) When viewed from the condenser section 20 side in the stacking direction, the opening 324 is formed in a position near the upper left side corner of the plate member 320. The position is a position that overlaps with the cooling water discharge portion 23 of the plate member 230 when viewed along the stacking direction. The opening 324 is formed as a hole for realizing the flow of the cooling water as indicated by an arrow A39 in FIG.

(4) When viewed from the condenser section 20 side in the stacking direction, the opening 325 is formed at a position near the upper right corner of the plate member 320. The position is a position that overlaps with the coolant supply unit 21 of the plate member 230 when viewed along the stacking direction. The opening 325 is formed as a hole for realizing the flow of the refrigerant as indicated by an arrow A22 in FIG.

被 A bonded portion 326 is formed on the outer peripheral side of the plate-shaped member 320. The joined portion 326 is formed to extend in the same direction as the joined portion 336 of the plate member 330 along the laminating direction from the entire outer peripheral edge of the plate member 320. For this reason, the shape of the plate member 320 is a cup shape similar to the plate member 330.

As described above, the subcool unit 30 has a configuration in which a plurality of the plate members 310 and the plate members 320 are alternately arranged between the plate members 330 and the plate members 110. Although FIG. 4 shows only two plate members 310 and one plate member 320, actually, more plate members 310 and plate members 320 are arranged. I have. Note that, in FIG. 5, the number of plate members 310 and the like included in the subcool unit 30 is omitted.

(5) The plurality of plate members 310 and the like included in the subcool unit 30 are stacked along the stacking direction as shown in FIG. The respective plate-shaped members (310 and the like) are water-tightly brazed at the contact portions in a state where the joined portions (316 and the like) adjacent to each other are in contact with each other.

第 A first flow path FP1 through which the refrigerant passes is formed between the plate member 110 and the plate member 310 adjacent thereto. In addition, a second flow path FP2 through which the cooling water passes is formed between the plate member 310 and the plate member 320 adjacent thereto. Thereafter, similarly, the first flow paths FP1 and the second flow paths FP2 are alternately arranged along the laminating direction between the plate members 310 and the like adjacent to each other.

The flow path through which the refrigerant passes through the opening 311 and the opening 321, that is, the guide flow path FP3 through which the refrigerant flows along the arrow A17 in FIG. 2 is formed so as to penetrate the subcool unit 30 linearly along the laminating direction. I have.

As shown in FIG. 5, a partition wall 311A is formed in the plate member 310 so as to extend from the edge of the opening 311 toward the plate member 330. Further, a partition wall 321A is formed on the plate member 320 so as to extend from the edge of the opening 321 toward the plate member 230. The partition wall 321A is fitted inside the adjacent partition wall 311A on the plate-like member 230 side, and the two are water-tightly brazed. With such a configuration, the refrigerant flowing through the guide flow path FP3 along the arrow A17 in FIG. 2 is prevented from flowing into the second flow path FP2 of the subcool unit 30.

An edge of the opening 311 formed in the plate member 310 and an edge of the opening 321 formed in the adjacent plate member 320 on the side of the plate member 230 are in contact with the entire circumference, and Watertight brazed. With such a configuration, the refrigerant flowing along the guide flow path FP3 along the arrow A17 in FIG. 2 is also prevented from flowing into the first flow path FP1 of the subcool unit 30.

The edge of the opening 311 formed in the plate member 310 adjacent to the plate member 110 and the edge of the opening 111 formed in the plate member 110 are also in contact over the entire circumference, And they are brazed watertight. Furthermore, the edge of the opening 321 formed in the plate-shaped member 320 adjacent to the plate-shaped member 330 and the edge of the opening 331 formed in the plate-shaped member 330 are also in contact over the entire circumference. And they are brazed watertight.

Thus, the guide flow path FP3 formed so as to penetrate the subcool section 30 along the laminating direction is communicated with both the first flow path FP1 and the second flow path FP2 formed in the subcool section 30. Absent. Therefore, after the refrigerant discharged from the condensing section 20 flows into the guide flow path FP3 through the opening 111 of the plate member 110, all of the refrigerant flows along the path indicated by the arrow A17 in FIG. Will be supplied to

The flow path through which the refrigerant passes through the opening 313, the opening 323, and the like, that is, the receiving flow path FP4 through which the refrigerant flows along the arrow A18 in FIG. I have. However, the receiving flow path FP4 communicates with each of the first flow paths FP1 formed in the subcool unit 30.

Similarly, the flow path through which the refrigerant flows through the openings 315, 325, and the like, that is, the flow path through which the refrigerant flows along the arrow A22 in FIG. 2 is also communicated with the respective first flow paths FP1 formed in the subcool unit 30. ing.

The flow path through which the cooling water passes through the opening 312, the opening 322, and the like, that is, the flow path through which the cooling water flows along the arrow A35 in FIG. 3, is communicated with each of the second flow paths FP2 formed in the subcool unit 30. I have. Similarly, the flow path through which the cooling water flows through the opening 314, the opening 324, and the like, that is, the flow path through which the cooling water flows along the arrow A39 in FIG. Are in communication.

As shown in FIG. 5, a partition wall 313A is formed in the plate member 310 so as to extend from the edge of the opening 313 toward the plate member 330. Further, a partition wall 323A is formed on the plate member 320 so as to extend from the edge of the opening 323 toward the plate member 230. The partition wall 323A is fitted inside the adjacent partition wall 313A on the plate-like member 230 side, and the two are water-tightly brazed. With such a configuration, the refrigerant flowing through the receiving flow path FP4 along the arrow A18 in FIG. 2 is prevented from flowing into the second flow path FP2 of the subcool unit 30. In addition, the edge of the opening 313 formed in the plate member 310 adjacent to the plate member 110 and the peripheral portion of the protruding portion 113 of the plate member 110 are in contact over the entire circumference, And they are brazed watertight. The end of the receiving flow path FP4 is closed by the protrusion 113.

As shown in FIG. 5, a partition wall 315A is formed in the plate member 310 so as to extend from the edge of the opening 315 toward the plate member 330. Further, a partition wall 325A is formed on the plate member 320 so as to extend from the edge of the opening 325 toward the plate member 110. The partition wall 325A is fitted inside the adjacent partition wall 315A on the plate-like member 110 side, and the two are water-tightly brazed. With such a configuration, the refrigerant flowing along the arrow A22 in FIG. 2 is prevented from flowing into the second flow path FP2 of the subcool unit 30.

The edge of the opening 312 formed in the plate member 310 and the edge of the opening 322 formed in the adjacent plate member 320 on the side of the plate member 110 are in contact with each other over the entire circumference, and Watertight brazed. With such a configuration, the cooling water flowing along the arrow A35 in FIG. 3 is prevented from flowing into the first flow path FP1 of the subcool unit 30. In addition, the edge of the opening 312 formed in the plate member 310 adjacent to the plate member 110 and the edge of the opening 112 formed in the plate member 110 are in contact with the entire circumference, And they are brazed watertight.

In the same manner as described above, the gap between the edge of the opening 314 formed in the plate member 310 and the edge of the opening 324 formed in the adjacent plate member 320 on the plate member 110 side extends over the entire circumference. Are in contact and brazed watertight. With such a configuration, the cooling water flowing along the arrow A39 in FIG. 3 is prevented from flowing into the first flow path FP1 of the subcool unit 30. The edge of the opening 314 formed in the plate member 310 adjacent to the plate member 110 and the edge of the opening 114 formed in the plate member 110 are in contact with the entire circumference, And they are brazed watertight.

Other configurations will be described. Inner fins IF1 are arranged in all the first flow paths FP1 and the second flow paths FP2 formed in the heat exchanger 10. FIG. 6 shows a part of the shape of the inner fin IF1. As shown in the figure, the inner fin IF1 is formed by bending a plate-like metal member into a rectangular wave shape. The direction in which the top of the wave formed on the inner fin IF1 extends extends along the longitudinal direction of the plate member 310 or the like, for example, the direction from the opening 311 to the opening 314.

(4) The heat exchange efficiency in the heat exchanger 10 is further increased by disposing the inner fin IF1 in each of the first flow path FP1 and the second flow path FP2.

形状 The shape of the inner fin IF1 arranged in the first flow path FP1, etc. is not limited to the shape shown in FIG. 6, and various shapes can be adopted. For example, the inner fin IF2 shown in FIG. 7 may be arranged in the first flow path FP1 or the like instead of the inner fin IF1. The inner fin IF2 has a shape in which a part of a wave extending along a straight line in FIG. 6 is offset in a direction perpendicular to the straight line. In the inner fin IF2 having such a shape, the fluid hits not only the end ED1 on the upstream side but also the end ED2 of the offset portion, so that heat transfer between the inner fin IF2 and the fluid. The rate can be further improved.

The inner fins IF1 and IF2 may be arranged in both the first flow path FP1 and the second flow path FP2 as in the present embodiment. It may be arranged only on one side.

As described above, in the heat exchanger 10 according to the present embodiment, each of the condensing section 20 and the subcooling section 30 has a plurality of plate members stacked along the stacking direction, The first flow path FP1 flowing and the second flow path FP2 through which the cooling water flows are configured to be alternately arranged in the laminating direction. Further, a guide flow path FP3 for guiding the refrigerant after passing through the condensing section 20 to the gas-liquid separator 40 is formed so as to penetrate the respective plate- like members 310, 320, 330 of the subcool section 30. I have.

(4) The condenser section 20 and the subcool section 30 are arranged so as to be adjacent to each other along the laminating direction in which the plate members 210 and the like are laminated. In such a configuration, the plate members 210 and 220 constituting the condensing unit 20 can be formed as members dedicated to the condensing unit 20 without considering whether or not the subcool unit 30 is provided. Therefore, the plate members 210 and 220 can be shared with a heat exchanger of a type in which the subcool unit 30 is not provided.

In the present embodiment, the guide passage FP3 for guiding the refrigerant after passing through the condenser 20 to the gas-liquid separator 40 is formed so as to penetrate the subcooler 30. As a result, each of the opening 331 for discharging the refrigerant toward the gas-liquid separator 40 and the opening 333 for receiving the liquid-phase refrigerant from the gas-liquid separator 40 is connected to the condensing section 20 of the subcool section 30. Can be formed on the opposite surface. For this reason, in the configuration in which the gas-liquid separator 40 is arranged at a position adjacent to the subcool unit 30 as in the present embodiment, the connection between the condensing unit 20 and the gas-liquid separator 40 and the connection between the subcool unit 30 and the gas Both the connection to the liquid separator 40 can be made by short tubes. As a result, an increase in the physique due to the routing of the piping is suppressed. In the present embodiment, the “short tube” refers to the protrusion 331A and the protrusion 333A in FIG.

As described above, in the heat exchanger 10 of the present embodiment, while it is possible to share some parts with the heat exchanger of the type in which the subcool unit 30 is not provided, the physique associated with the routing of the piping is achieved. Can be suppressed.

By the way, the mass flow rate of the refrigerant flowing into the gas-liquid separator 40 and the mass flow rate of the refrigerant discharged from the gas-liquid separator 40 are equal to each other. However, while the refrigerant flowing into the gas-liquid separator 40 is in a gas-liquid mixed state, all of the refrigerant discharged from the gas-liquid separator 40 is in a liquid phase. For this reason, the flow velocity of the refrigerant discharged from the gas-liquid separator 40 is smaller than the flow velocity of the refrigerant flowing into the gas-liquid separator 40.

Therefore, the inside diameter of the receiving hole for receiving the liquid-phase refrigerant discharged from the gas-liquid separator 40, that is, the inside diameter of the openings 313, 323, and 333, is set so that the refrigerant passing through the guide flow path FP3 is directed to the gas-liquid separator 40. Even if it is made smaller than the inner diameter of the discharge hole for discharging the liquid, ie, the inner diameters of the openings 311, 321 and 331, the pressure loss in the receiving hole does not become too large.

Therefore, in the present embodiment, the inner diameters of the openings 313, 323, and 333, which are the receiving holes, are made smaller than the inner diameters of the openings 311, 321 and 331, which are the discharging holes. As a result, the plurality of openings 311 and the like can be arranged without waste in a limited area such as the plate member 310.

In the present embodiment, the inner diameter of all of the plurality of receiving holes is smaller than the inner diameter of any of the discharging holes. Instead of such a mode, a mode may be adopted in which only the receiving hole closest to the gas-liquid separator 40, that is, the inner diameter of the opening 333 is smaller than the inner diameter of each discharge hole.

A second embodiment will be described with reference to FIG. This embodiment is different from the first embodiment in the path in which the refrigerant flows through the condenser 20. In the present embodiment, the refrigerant is configured not to flow in the path indicated by the arrow in FIG. 2 but to flow in the path indicated by the arrow in FIG. The path through which the refrigerant flows through the subcool unit 30, that is, the path indicated by arrows A18 to A22 is the same as in the first embodiment.

As shown in FIG. 8, the refrigerant supplied from the refrigerant supply unit 21 is not distributed to the plurality of first flow paths FP1 of the condensation unit 20, but flows sequentially through the plurality of first flow paths FP1. . Specifically, the refrigerant flows along the arrow A50 and then flows along the first flow path FP1 closest to the refrigerant supply unit 21 along the arrow A51. Then, after flowing to the subcool part 30 side along arrow A52, it flows along the arrow A53 through the first flow path FP1 which is one side closer to the subcool part 30 than the first flow path FP1. Thereafter, the refrigerant flows along the paths indicated by arrows A50 to A60 while changing the flow direction alternately each time the refrigerant flows into the first flow path FP1. Such a flow of the refrigerant can be realized, for example, by closing a part of the opening 215 in the middle of the path indicated by the arrow A10 in FIG.

As described above, in the condensing section 20 of the present embodiment, the direction in which the refrigerant flows in some of the first flow paths FP1 (for example, the flow path in which the refrigerant flows along the arrow A51) and the other part of the first flow path FP1 The direction in which the refrigerant flows in the path FP1 (for example, the flow path in which the refrigerant flows along the arrow A53) is different from each other. In such a configuration, the length of the path through which the refrigerant flows in the condensing section 20 is longer than in the case of the first embodiment shown in FIG. As a result, the cooling of the refrigerant can be performed more efficiently. In such a mode, the same effects as those described in the first embodiment can be obtained.

A third embodiment will be described with reference to FIG. The present embodiment is different from the first embodiment in the path in which the cooling water flows through the condenser 20 and the subcooler 30. In the present embodiment, the configuration is such that the cooling water flows not in the path indicated by the arrow in FIG. 3 but in the path indicated by the arrow in FIG. 9. Note that, in the present embodiment, the cooling water discharge part 23 which is the outlet of the cooling water is not provided in the condenser part 20, and the cooling water discharge part 32 is provided in the plate member 330 of the subcool part 30 instead. I have.

As shown in FIG. 9, the cooling water supplied from the cooling water supply unit 22 does not distribute to the plurality of second flow paths FP2 of the condensing unit 20 but flows sequentially through the plurality of second flow paths FP2. Go. Specifically, after the cooling water flows along arrow A70, it flows along the second flow path FP2 closest to the cooling water supply unit 22 along arrow A71. Then, after flowing to the subcool part 30 side along the arrow A72, it flows along the arrow A73 through the second flow path FP2, which is closer to the subcool part 30 by one than the second flow path FP2. After that, the cooling water flows along the paths indicated by arrows A70 to A78 while alternately changing the flow direction each time the cooling water flows into the second flow path FP2. Such a flow of the cooling water can be realized, for example, by closing a part of the opening 222 in the middle of the path indicated by the arrow A30 in FIG.

As described above, in the condensing section 20 of the present embodiment, the direction in which the cooling water flows in some of the second flow paths FP2 (for example, the flow path in which the cooling water flows along the arrow A71) and the other part of the second flow path FP2 The directions in which the cooling water flows in the two flow paths FP2 (for example, the flow path in which the cooling water flows along the arrow A73) are different from each other. In such a configuration, the length of the path through which the cooling water flows in the condenser 20 is longer than in the case of the first embodiment shown in FIG. As a result, the cooling of the refrigerant can be performed more efficiently. In such a mode, the same effects as those described in the first embodiment can be obtained.

冷却 The cooling water that has reached the subcool unit 30 along the arrow A78 flows into the subcool unit 30 along the lamination direction as it is. The flow path of the cooling water is the same as the path indicated by arrow A35 in FIG. 3, but in FIG. 9, the path is indicated again by arrow A79.

(4) The cooling water is distributed to the respective second flow paths FP2 formed in the subcool unit 30 while flowing so as to penetrate the respective plate members 310 and the like in the laminating direction. The flow path of the cooling water distributed in this manner is the same as the paths indicated by A36 to A38 in FIG. 3, but in FIG. 9, the paths are indicated again by A80 to A82.

(4) The cooling water that has flowed through each of the second flow paths FP2 in the subcool unit 30 merges again and flows so as to penetrate the respective plate members 310 and the like along the laminating direction. The flowing direction of the cooling water at this time is a direction toward the cooling water discharge portion 32 of the plate-shaped member 330. In FIG. 9, such a flow of the cooling water is indicated by an arrow A83. The cooling water passes through the cooling water discharge unit 32 as it is along the arrow A83, and is discharged from the cooling water discharge unit 32 to the outside.

As described above, a mode in which the discharge of the cooling gas through the heat exchanger 10 is performed from the subcool unit 30 side instead of the condensing unit 20 side may be adopted.

The embodiment has been described above with reference to specific examples. However, the present disclosure is not limited to these specific examples. Those in which those skilled in the art appropriately change the design of these specific examples are also included in the scope of the present disclosure as long as they have the features of the present disclosure. The components included in the specific examples described above and the arrangement, conditions, shapes, and the like of the components are not limited to those illustrated, and can be appropriately changed. The elements included in each of the specific examples described above can be appropriately changed in combination as long as no technical inconsistency occurs.

Claims (6)

1. A heat exchanger (10) for performing heat exchange between a refrigerant and cooling water,
   A condensing unit (20) for cooling and condensing the gas-phase refrigerant with cooling water;
   A gas-liquid separator (40) for receiving the refrigerant after passing through the condensing section and discharging a liquid-phase refrigerant among the refrigerant;
   A sub-cooling section (30) for further cooling the liquid-phase refrigerant discharged from the gas-liquid separator with cooling water;
   Both the condenser section and the subcool section,
   It has a plurality of plate-like members (210, 220, 230, 310, 320, 330) stacked along the stacking direction. And a flow path (FP2) are alternately arranged along the lamination direction.
   Furthermore, the condensing section and the subcool section are arranged so as to be adjacent to each other along the laminating direction,
   The guide channel (FP3) for guiding the refrigerant after passing through the condensing section to the gas-liquid separator penetrates each of the plate members (310, 320, 330) of the subcool section. Heat exchanger formed.
2. The plate-shaped member included in the subcool portion includes:
   Discharge holes (311, 321 and 331) for discharging the refrigerant passing through the guide flow path toward the gas-liquid separator;
   Receiving holes (313, 323, 333) for receiving the liquid-phase refrigerant discharged from the gas-liquid separator,
   The heat exchanger according to claim 1, wherein an inner diameter of the receiving hole is smaller than an inner diameter of the discharge hole.
3. The heat exchanger according to claim 1 or 2, wherein inner fins (IF1, IF2) are arranged in at least one of the first flow path and the second flow path.
4. In the condensing section,
   The direction in which the refrigerant flows in some of the first flow paths and the direction in which the refrigerant flows in another of the other first flow paths are different from each other. Heat exchanger.
5. In the condensing section,
   The direction in which the cooling water flows in some of the second flow paths and the direction in which the cooling water flows in another of the second flow paths are different from each other. A heat exchanger according to item 1.
6. The heat exchanger according to any one of claims 1 to 5, wherein the gas-liquid separator is disposed at a position opposite to the condensing portion with respect to the subcool portion.

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