JP6840262B2 - Laminated headers, heat exchangers, and refrigeration cycle equipment - Google Patents

Description

The present invention relates to a laminated header that distributes and supplies a refrigerant, a heat exchanger provided with the laminated header, and a refrigeration cycle device provided with the heat exchanger.

Generally, a heat exchanger has a flow path in which a plurality of heat transfer tubes are arranged in parallel in order to reduce the pressure loss of the refrigerant flowing in the heat transfer tubes. A header for distributing and supplying the refrigerant to each heat transfer tube is arranged at the refrigerant inlet portion of each heat transfer tube. Conventionally, a laminated header is known as a header. In this laminated header, a refrigerant is supplied to each heat transfer tube of the heat exchanger by laminating a plurality of plate-like bodies forming a distribution flow path that branches into a plurality of outlet flow paths with respect to one inlet flow path. It is distributed and supplied (see, for example, Patent Document 1).

International Publication No. 2016/071946

In the laminated header, it is desirable to keep the distribution ratio of the refrigerant uniform in order to uniformly supply the refrigerant to each heat transfer tube of the heat exchanger. In particular, when the heat exchanger functions as an evaporator, it is the heat exchanger that functions as an evaporator to keep the ratio of the flow rate of the liquid refrigerant flowing out from each of the plurality of outlet flow paths, that is, the distribution rate of the refrigerant uniform. It is important to ensure the performance of.
In the laminated header of Patent Document 1, the liquid refrigerant becomes biased in the distribution flow path while the refrigerant is repeatedly branched in the branch flow path, and the liquid refrigerant may flow out unevenly at a plurality of refrigerant outlets. There is sex. Then, the refrigerant is non-uniformly supplied to each heat transfer tube of the heat exchanger, and the heat exchange performance is deteriorated.

The present invention has been made against the background of the above problems, and is a laminated header, a heat exchanger, and a refrigeration cycle device capable of uniformly distributing the refrigerant to each heat transfer tube of the heat exchanger. The purpose is to provide.

The laminated header according to the present invention has one first opening, a plurality of second openings, and a distribution flow path communicating the first opening and the plurality of second openings, and has a plurality of plates. A laminated header formed by laminating shaped bodies, wherein the distribution flow path communicates with the first opening and extends in a direction in which the plurality of plate-shaped bodies are laminated. , The first branch flow path that communicates with the first flow path and branches the first flow path into a plurality of flow paths, and the direction in which the plurality of plate-like bodies are laminated by communicating with the first branch flow path. The first folded flow path extending in the longitudinal direction of the same plate-like body and communicating with each of the plurality of linear second flow paths extending in the longitudinal direction and the first folded flow path. Then, the plurality of linear third flow paths extending in the stacking direction of the plurality of plate-like bodies and the plurality of third flow paths are communicated with each other, and each of the plurality of third flow paths is connected to each other. A second branch flow path that branches into the flow path, a plurality of linear fourth flow paths that communicate with the second branch flow path and extend in the stacking direction of the plurality of plate-like bodies, and the plurality of fourth flow paths. A second folded flow path that communicates with each of the flow paths and extends in the longitudinal direction of the same plate-shaped body, and a plurality of linear shapes that communicate with the second folded flow path and extend in the stacking direction of the plurality of plate-shaped bodies. A third branch flow path that communicates with each of the fifth flow path and the plurality of fifth flow paths and branches each of the plurality of fifth flow paths into a plurality of flow paths, and the third branch flow path. Each of the plurality of linearly shaped sixth flow paths extending in the direction in which the plurality of plate-like bodies are laminated is included, and the plurality of second flow paths and the plurality of fourth flow paths are described. the first flow path, the plurality of third flow path, the plurality of fifth flow path, and wherein the flow of the refrigerant flowing through the sixth flow path is configured such that the refrigerant flows in the opposite direction, said sixth stream The through holes forming the path are arranged as a group of two through holes communicating with the same third branch flow path, and form the through hole forming the first branch flow path and the second branch flow path. At least one of the through holes to be formed is formed between the groups .
Further, the laminated header according to the present invention has one first opening, a plurality of second openings, and a plurality of distribution flow paths that communicate the first opening and the plurality of second openings. It is a laminated type header formed by laminating the plate-shaped bodies of the above, and the distribution flow path communicates with the first opening and extends in the laminating direction of the plurality of plate-shaped bodies. A stack of the plurality of plate-like bodies communicating with the road, the first branch flow path that communicates with the first flow path and branches the first flow path into a plurality of flow paths, and the first branch flow path. A plurality of linearly shaped second flow paths extending in the direction of the line, a first folding flow path communicating with each of the plurality of second flow paths and extending in the longitudinal direction of the same plate-like body, and the first folding flow path. And each of the plurality of linear third flow paths extending in the stacking direction of the plurality of plate-like bodies and the plurality of third flow paths, and each of the plurality of third flow paths. A second branch flow path that branches into a plurality of flow paths, a plurality of linear fourth flow paths that communicate with the second branch flow path and extend in the stacking direction of the plurality of plate-like bodies, and the plurality of linear flow paths. A linear shape that communicates with each of the fourth flow paths and extends in the longitudinal direction of the same plate-like body and communicates with the second folded flow path and extends in the direction in which the plurality of plate-like bodies are laminated. A third branch flow path that communicates with each of the plurality of fifth flow paths and the plurality of fifth flow paths and branches each of the plurality of fifth flow paths into a plurality of flow paths, and the third branch. The plurality of second flow paths and the plurality of fourth flow paths include a plurality of linear sixth flow paths that communicate with each of the flow paths and extend in the direction in which the plurality of plate-like bodies are laminated. The first flow path, the plurality of third flow paths, the plurality of fifth flow paths, and the sixth flow path are configured so that the refrigerant flows in the direction opposite to the flow of the refrigerant. The two-branch flow path is formed on the plurality of second opening sides of the position of the third branch flow path.

According to the laminated header according to the present invention, the first flow path, the second flow path, the third flow path, the fourth flow path, the fifth flow path, and the sixth flow path, which are straight portions, have a constant length. Since it is formed by the header, the bias of the refrigerant is suppressed, and the distribution rate can be made uniform.

It is a front view which shows schematic structure of the heat exchanger which concerns on Embodiment 1 of this invention. It is explanatory drawing for demonstrating the 1st plate-like body which comprises the laminated type header which concerns on Embodiment 1 of this invention. It is explanatory drawing for demonstrating the 2nd plate-like body which comprises the laminated type header which concerns on Embodiment 1 of this invention. It is an exploded perspective view which shows roughly the state which disassembled the laminated type header which concerns on Embodiment 1 of this invention. It is a vertical sectional view for demonstrating the flow of the refrigerant in the laminated header which concerns on Embodiment 1 of this invention. It is a circuit block diagram which shows typically the example of the refrigerant circuit structure of the air conditioner which is an example of the refrigeration cycle device which concerns on Embodiment 2 of this invention.

Hereinafter, the laminated header, the heat exchanger, and the refrigeration cycle apparatus according to the present invention will be described with reference to the drawings.
The configurations and operations described below are merely examples, and the laminated header, heat exchanger, and refrigeration cycle apparatus according to the present invention are not limited to such configurations and operations. Further, in each figure, the same or similar objects are designated by the same reference numerals or the reference numerals are omitted. Further, for the detailed structure, the illustration is simplified or omitted as appropriate. In addition, duplicate or similar explanations are simplified or omitted as appropriate.

Further, the case where the laminated header according to the present invention distributes the refrigerant flowing into the heat exchanger is described below, but the present invention is not limited to such a case and flows into other equipment. It may distribute the refrigerant. Further, the case where the heat exchanger according to the present invention is applied to an air conditioner which is an example of a refrigeration cycle device is described, but the present invention is not limited to such a case, and for example, the heat exchanger has a refrigerant circulation circuit. It may be applied to the refrigeration cycle apparatus of. Further, the case where the refrigeration cycle device switches between the heating operation (heating operation) and the cooling operation (cooling operation) is described, but the case is not limited to such a case, and only the heating operation or the cooling operation is performed. It may be what you do.

Embodiment 1.
The laminated header 2 and the heat exchanger 1 according to the first embodiment of the present invention will be described.
<Structure of heat exchanger 1>
The schematic configuration of the heat exchanger 1 according to the first embodiment will be described below.
FIG. 1 is a front view schematically showing the configuration of the heat exchanger 1 according to the first embodiment. In FIG. 1, the flow direction of the refrigerant is indicated by an arrow.

As shown in FIG. 1, the heat exchanger 1 has a laminated header 2, a cylindrical header 3, a plurality of heat transfer tubes 4, a holding member 5, and a plurality of fins 6.
Instead of the cylindrical header 3, a header of the same type as the laminated header 2 may be used.

The laminated header 2 has one refrigerant inflow portion 2A and a plurality of refrigerant outflow portions 2B. Further, at least one distribution flow path that communicates one refrigerant inflow portion 2A and a plurality of refrigerant outflow portions 2B is formed inside the laminated header 2. The refrigerant pipe 20A of the refrigeration cycle device is connected to the refrigerant inflow portion 2A. One end 4A of the heat transfer tube 4 is connected to each of the refrigerant outflow portions 2B.
The refrigerant inflow portion 2A corresponds to the "first opening" of the present invention. Further, the refrigerant outflow portion 2B corresponds to the "second opening" of the present invention.

The cylindrical header 3 has a plurality of refrigerant inflow portions 3A and one refrigerant outflow portion 3B. Further, inside the cylindrical header 3, a merging flow path that communicates a plurality of refrigerant inflow portions 3A and one refrigerant outflow portion 3B is formed. The other end 4B of the heat transfer tube 4 is connected to each of the refrigerant inflow portions 3A. The refrigerant pipe 20B of the refrigeration cycle device is connected to the refrigerant outflow portion 3B.

In the heat transfer tube 4, one end 4A is connected to the refrigerant outflow portion 2B of the laminated header 2, and the other end 4B is connected to the refrigerant inflow portion 3A of the cylindrical header 3. That is, a plurality of heat transfer tubes 4 are provided between the laminated header 2 and the cylindrical header 3, and connect the laminated header 2 and the cylindrical header 3. One end 4A, which is the end of the heat transfer tube 4 on the laminated header 2 side, is connected to the refrigerant outflow portion 2B of the laminated header 2 while being held by the holding member 5. The heat transfer tube 4 is a circular tube or a flat tube in which a plurality of flow paths are formed. The heat transfer tube 4 is made of, for example, copper or aluminum. A plurality of fins 6 are joined to the outer periphery of the heat transfer tube 4.
Although FIG. 1 shows a case where the number of heat transfer tubes 4 is eight, the number of heat transfer tubes 4 is not limited to the illustrated number, and two or more heat transfer tubes 4 may be used.

The holding member 5 is made of a plate-shaped member, and has a hole through which one end 4A of the heat transfer tube 4 is inserted. That is, the heat transfer tube 4 is inserted into the hole portion of the holding member 5, so that a part of the periphery thereof is held by the holding member 5. The holding member 5 is made of, for example, aluminum.

The fin 6 is made of, for example, aluminum. The heat transfer tube 4 and the fin 6 are joined by brazing, for example.
The number of fins 6 is not limited.

<Flow of refrigerant in heat exchanger 1>
The flow of the refrigerant in the heat exchanger 1 will be described below. The flow of the refrigerant when the heat exchanger 1 functions as an evaporator will be described.

The refrigerant flowing through the refrigerant pipe 20A of the refrigerating cycle device flows into the laminated header 2 via the refrigerant inflow portion 2A. The refrigerant that has flowed into the laminated header 2 is distributed by a distribution flow path formed inside the laminated header 2, and flows into a plurality of heat transfer tubes 4 via the plurality of refrigerant outflow portions 2B. The refrigerant exchanges heat with, for example, air supplied by a blower in the plurality of heat transfer tubes 4. The refrigerant flowing through the plurality of heat transfer tubes 4 flows into the cylindrical header 3 through the plurality of refrigerant inflow portions 3A. The refrigerant that has flowed into the cylindrical header 3 merges in the merging flow path formed inside the cylindrical header 3, and flows out to the refrigerant pipe 20B via the refrigerant outflow portion 3B.

In the heat exchanger 1, the refrigerant can flow back, that is, can flow from the cylindrical header 3 toward the laminated header 2. That is, when the heat exchanger 1 functions as a condenser, the refrigerant flows from the cylindrical header 3 toward the laminated header 2.

<Structure of laminated header 2>
The configuration of the laminated header 2 will be described below. FIG. 2 is an explanatory diagram for explaining a first plate-like body constituting the laminated header 2. FIG. 3 is an explanatory diagram for explaining the second plate-like body constituting the laminated header 2. FIG. 4 is an exploded perspective view schematically showing a state in which the laminated header 2 is disassembled. Note that FIG. 2 schematically shows a state in which each first plate-like body is viewed from the flow direction of the refrigerant. Similarly, FIG. 3 schematically shows a state in which each second plate-like body is viewed from the flow direction of the refrigerant. In FIG. 4, the flow of the refrigerant is indicated by a broken line arrow. The state viewed from the flow direction of the refrigerant means the state viewed from the refrigerant inflow portion 2A side of the laminated header 2.

As shown in FIGS. 2 and 4, the laminated header 2 includes a first plate-shaped body 111, a first plate-shaped body 112, a first plate-shaped body 113, a first plate-shaped body 114, and a first plate. It has a shape 115. The first plate-shaped body 111, the first plate-shaped body 112, the first plate-shaped body 113, the first plate-shaped body 114, and the first plate-shaped body 115 have, for example, a rectangular shape having a thickness of about 1 to 10 mm. It is composed of plate-shaped members. Further, the first plate-shaped body 111, the first plate-shaped body 112, the first plate-shaped body 113, the first plate-shaped body 114, and the first plate-shaped body 115 are made of, for example, aluminum.
In the following description, unless it is necessary to explain separately, the first plate-shaped body 111, the first plate-shaped body 112, the first plate-shaped body 113, the first plate-shaped body 114, and the first plate-shaped body 114, and the first plate-shaped body 114. The one plate-shaped body 115 is collectively referred to as the first plate-shaped body.

Further, as shown in FIGS. 3 and 4, the laminated header 2 has a second plate-shaped body 121, a second plate-shaped body 122, a second plate-shaped body 123, and a second plate-shaped body 124. doing. The second plate-shaped body 121, the second plate-shaped body 122, the second plate-shaped body 123, and the second plate-shaped body 124 are composed of, for example, a rectangular plate-shaped member having a thickness of about 1 to 10 mm. There is. The second plate-shaped body 121, the second plate-shaped body 122, the second plate-shaped body 123, and the second plate-shaped body 124 are made of, for example, aluminum.
In the following description, if it is not necessary to explain separately, the second plate-shaped body 121, the second plate-shaped body 122, the second plate-shaped body 123, and the second plate-shaped body 124 may be referred to. Collectively referred to as the second plate-like body.

(First plate-shaped body 111)
The first plate-shaped body 111 is formed with one circular through hole 10a-1 when viewed from the flow direction of the refrigerant. The through hole 10a-1 functions as the refrigerant inflow portion 2A. The through hole 10a-1 is formed in the central portion of the first plate-shaped body 111.

(First plate-shaped body 112)
The first plate-shaped body 112 is formed with one circular through hole 10a-3 when viewed from the flow direction of the refrigerant. The through hole 10a-3 is formed in the central portion of the first plate-shaped body 112.
Further, the first plate-shaped body 112 is formed with four linear through holes 12b when viewed from the flow direction of the refrigerant. The four through holes 12b are formed so as to be linearly arranged in the vertical direction of the paper surface.

Further, the first plate-shaped body 112 is formed with two curved through holes 11b when viewed from the flow direction of the refrigerant. The through hole 11b on the upper side of the paper surface is formed so as to bypass the second through hole 12b from the paper surface. The through hole 11b on the lower side of the paper surface is formed so as to bypass the second through hole 12b from the lower side of the paper surface. The two through holes 11b are formed so as to be point-symmetrical with respect to the through holes 10a-3. The shape of the through hole 11b is not limited to the shape shown in the figure, and any shape may be used as long as it can bypass the through hole 12b.

(First plate-like body 113)
The first plate-shaped body 113 is formed with one circular through hole 10a-5 when viewed from the flow direction of the refrigerant.
Further, the first plate-shaped body 113 is formed with two circular through holes 11a-2 when viewed from the flow direction of the refrigerant. The through hole 11a-2 is formed adjacent to the through hole 10a-5 so as to be symmetrical with respect to the through hole 10a-5.
Further, the first plate-shaped body 113 is formed with four substantially S-shaped through holes 12d when viewed from the flow direction of the refrigerant. The four through holes 12d are formed so as to be arranged in the vertical direction of the paper surface.

Further, the first plate-shaped body 113 is formed with two circular through holes 11c-2 when viewed from the flow direction of the refrigerant. The through hole 11c-2 on the upper side of the paper surface is formed in the central portion between the two through holes 12d on the upper side of the paper surface. The through hole 11c-2 on the lower side of the paper surface is formed in the central portion between the two through holes 12d on the lower side of the paper surface.
In addition, the first plate-shaped body 113 is formed with four circular through holes 12a-2 when viewed from the flow direction of the refrigerant. The two through holes 12a-2 on the upper side of the paper surface are formed so as to be adjacent to the through holes 11c-2 on the upper side of the paper surface and arranged in the vertical direction of the paper surface. The two through holes 12a-2 on the lower side of the paper surface are formed so as to be adjacent to the through holes 11c-2 on the lower side of the paper surface and arranged in the vertical direction of the paper surface.

(First plate-shaped body 114)
Eight circular through holes 13a-2 are formed in the first plate-shaped body 114 when viewed from the flow direction of the refrigerant. The eight through holes 13a-2 are formed so as to line up in the vertical direction of the paper surface. Further, the eight through holes 13a-2 are arranged with two through holes 13a-2 arranged vertically as one group. That is, the eight through holes 13a-2 are arranged so as to be arranged in the vertical direction with the two through holes 13a-2 communicating with the same third branch flow path 12D as one group.

The first through hole 13a-2 from the paper surface and the second through hole 13a-2 from the paper surface are grouped together. The third through hole 13a-2 from the paper surface and the fourth through hole 13a-2 from the paper surface are grouped together. The fifth through hole 13a-2 from the paper surface and the sixth through hole 13a-2 from the paper surface are grouped together. The seventh through hole 13a-2 from the paper surface and the eighth through hole 13a-2 from the paper surface are grouped together.

Further, the first plate-shaped body 114 is formed with two substantially S-shaped through holes 11d and one substantially S-shaped through hole 10b when viewed from the flow direction of the refrigerant. One through hole 10b and two through holes 11d are formed so as to be arranged in the vertical direction of the paper surface. The through hole 11d on the upper side of the paper surface is formed between the second and third through holes 13a-2 from the upper side of the paper surface. The through hole 11b between the through holes 11d is formed between the fourth and fifth through holes 13a-2 from the upper side of the paper surface. The through hole 11d on the lower side of the paper surface is formed between the sixth and seventh through holes 13a-2 from the upper side of the paper surface.

(First plate-shaped body 115)
The first plate-shaped body 115 is formed with eight circular through holes 13a-4 when viewed from the flow direction of the refrigerant. The eight through holes 13a-4 are formed so as to line up in the vertical direction of the paper surface. The eight through holes 13a-4 are arranged with two through holes 13a-4 arranged one above the other as a group. That is, the eight through holes 13a-4 are arranged so as to be arranged in the vertical direction, with the two through holes 13a-4 communicating with the same third branch flow path 12D as one group. The through holes 13a-4 function as the refrigerant outflow portion 2B.

(2nd plate-like body 121)
The second plate-shaped body 121 is formed with one circular through hole 10a-2 when viewed from the flow direction of the refrigerant. The through hole 10a-2 is formed in the central portion of the second plate-shaped body 121.

(Second plate-shaped body 122)
The second plate-shaped body 122 is formed with one circular through hole 10a-4 when viewed from the flow direction of the refrigerant. The through hole 10a-4 is formed in the central portion of the second plate-shaped body 122.
Further, the second plate-shaped body 122 is formed with two circular through holes 11a-3 when viewed from the flow direction of the refrigerant. The through hole 11a-3 is formed adjacent to the through hole 10a-4 so as to be symmetrical with respect to the through hole 10a-4.
Further, the second plate-shaped body 122 is formed with four circular through holes 12c when viewed from the flow direction of the refrigerant. The four through holes 12c are formed so as to be arranged in the vertical direction of the paper surface.

Further, the second plate-shaped body 122 is formed with two circular through holes 11c-1 when viewed from the flow direction of the refrigerant. The through hole 11c-1 on the upper side of the paper surface is formed in the central portion between the first and second through holes 12c from the upper side of the paper surface. The through hole 11c-1 on the lower side of the paper surface is formed in the central portion between the first and second through holes 12c from the lower side of the paper surface.
In addition, the second plate-shaped body 122 is formed with four circular through holes 12a-3 when viewed from the flow direction of the refrigerant. The first and second through holes 12a-3 from the upper side of the paper surface are formed adjacent to the through holes 11c-1 so as to be symmetrical with respect to the through holes 11c-1 on the upper side of the paper surface. The first and second through holes 12a-3 from the lower side of the paper surface are formed adjacent to the through holes 11c-1 so as to be symmetrical with respect to the through holes 11c-1 on the lower side of the paper surface.

(2nd plate-like body 123)
The second plate-shaped body 123 is formed with one circular through hole 10a-6 when viewed from the flow direction of the refrigerant. The through hole 10a-6 is formed in the central portion of the second plate-shaped body 123.
Further, the second plate-shaped body 123 is formed with two circular through holes 11a-1 when viewed from the flow direction of the refrigerant. The through hole 11a-1 is formed adjacent to the through hole 10a-5 so as to be symmetrical with respect to the through hole 10a-6.

Further, the second plate-shaped body 123 is formed with eight circular through holes 13a-1 when viewed from the flow direction of the refrigerant. The eight through holes 13a-1 are formed so as to line up in the vertical direction of the paper surface. The eight through holes 13a-1 are arranged with two through holes 13a-1 arranged one above the other as a group. That is, the eight through holes 13a-1 are arranged so as to be arranged in the vertical direction, with the two through holes 13a-1 communicating with the same third branch flow path 12D as one group.

Further, the second plate-shaped body 123 is formed with two circular through holes 11c-3 when viewed from the flow direction of the refrigerant. The through hole 11c-3 on the upper side of the paper surface is formed in the central portion between the second and third through holes 13a-1 from the upper side of the paper surface. The through hole 11c-3 on the lower side of the paper surface is formed in the central portion between the second and third through holes 13a-1 from the lower side of the paper surface.
In addition, the second plate-shaped body 123 is formed with four circular through holes 12a-1 when viewed from the flow direction of the refrigerant. The first and second through holes 12a-1 from the upper side of the paper surface are formed adjacent to the through holes 11c-3 so as to be symmetrical with respect to the through holes 11c-3 on the upper side of the paper surface. The first and second through holes 12a-1 from the lower side of the paper surface are formed adjacent to the through holes 11c-3 so as to be symmetrical with respect to the through holes 11c-3 on the lower side of the paper surface.

(Second plate-shaped body 124)
The second plate-shaped body 124 is formed with eight circular through holes 13a-3 when viewed from the flow direction of the refrigerant. The eight through holes 13a-3 are formed so as to line up in the vertical direction of the paper surface. The eight through holes 13a-3 are arranged with two through holes 13a-3 arranged one above the other as a group. That is, the eight through holes 13a-3 are arranged so as to be arranged in the vertical direction with the two through holes 13a-3 communicating with the same third branch flow path 12D as one group.

(Laminated header 2)
The laminated header 2 is configured by alternately laminating the first plate-shaped body and the second plate-shaped body configured as described above. That is, the laminated header 2 is configured by sandwiching the second plate-shaped body between the first plate-shaped bodies.
A brazing material is applied to both sides or one side of the second plate-like body.
The first plate-like body is laminated via the second plate-like body, and is integrally joined by brazing.

Specifically, the second plate-shaped body 121 is sandwiched between the first plate-shaped body 111 and the first plate-shaped body 112. Further, the second plate-shaped body 122 is sandwiched between the first plate-shaped body 112 and the first plate-shaped body 113. Further, the second plate-shaped body 123 is sandwiched between the first plate-shaped body 113 and the first plate-shaped body 114. Further, the second plate-shaped body 124 is sandwiched between the first plate-shaped body 114 and the first plate-shaped body 115.

By stacking the first plate-shaped body and the second plate-shaped body, a distribution flow path for communicating the refrigerant inflow portion 2A and the plurality of refrigerant outflow portions 2B is formed. The distribution flow paths include the first flow path 10A, the first branch flow path 10B, the second flow path 11A, the first turn-back flow path 11B, the third flow path 11C, the second branch flow path 11D, and the fourth flow path 12A. It is composed of a second folded flow path 12B, a fifth flow path 12C, a third branch flow path 12D, and a sixth flow path 13A. Here, the case where the refrigerant is branched into eight is shown as an example. Therefore, as shown in FIG. 4, the first flow path 10A and the first branch flow path 10B are formed one by one. Two second flow paths 11A, two first folded flow paths 11B, two third flow paths 11C, and two second branch flow paths 11D are formed. The fourth flow path 12A, the second folded flow path 12B, the fifth flow path 12C, and the third branch flow path 12D are formed four by four. And eight sixth flow paths 13A are formed.

The first flow path 10A communicates with the through hole 10a-1, the through hole 10a-2, the through hole 10a-3, the through hole 10a-4, the through hole 10a-5, and the through hole 10a-6. It is formed in a linear shape extending in the stacking direction of the first plate-shaped body and the second plate-shaped body. That is, the through hole 10a-1, the through hole 10a-2, the through hole 10a-3, the through hole 10a-4, the through hole 10a-5, and the through hole 10a-6 are the first plate-like body and the second plate. In a state where the bodies are laminated, they are formed at opposite positions so as to communicate with each other.

A through hole 10b serving as a first branch flow path 10B is formed at a position of the through hole 10a-6 opposite to the through hole 10a-5. Then, the first flow path 10A communicates with the center of the first branch flow path 10B.

The first branch flow path 10B is formed by a through hole 10b. That is, the first branch flow path 10B communicates with the first flow path 10A and branches the first flow path 10A into a plurality of flow paths. Therefore, the refrigerant flowing through the first flow path 10A is branched into two in the vertical direction of the paper surface in the first branch flow path 10B. The flow of the refrigerant is turned back by the first branch flow path 10B. A second flow path 11A is communicated with both ends of the first branch flow path 10B.

The second flow path 11A is a straight line extending in the stacking direction of the first plate-shaped body and the second plate-shaped body by communicating the through hole 11a-1, the through hole 11a-2, and the through hole 11a-3. Formed into a shape. That is, the through hole 11a-1, the through hole 11a-2, and the through hole 11a-3 are formed at positions facing each other in a state where the first plate-shaped body and the second plate-shaped body are laminated, and communicate with each other. It is designed to do. In the second flow path 11A, the refrigerant flows in the direction opposite to the refrigerant flowing in the first flow path 10A.

A through hole 11b serving as a first folded flow path 11B is formed at a position of the through hole 11a-3 opposite to the through hole 11a-2. Then, the second flow path 11A communicates with one end of the first folded flow path 11B.

The first folded flow path 11B is formed by a through hole 11b extending in the longitudinal direction of the first plate-shaped body 112. The refrigerant flowing through the second folded flow path 11A flows in from one end of the first folded flow path 11B, flows in the longitudinal direction of the first plate-shaped body 112, and flows out from the other end of the first folded flow path 11B. To do. In the first folded flow path 11B, the second flow path 11A is communicated with one end and the third flow path 11C is communicated with the other end, so that the flow of the refrigerant is folded back. The longitudinal direction of the first plate-shaped body 112 is the vertical direction of the paper surface of the first plate-shaped body 112.

The third flow path 11C is a straight line extending in the stacking direction of the first plate-shaped body and the second plate-shaped body by communicating the through hole 11c-1, the through hole 11c-2, and the through hole 11c-3. Formed into a shape. That is, the through hole 11c-1, the through hole 11c-2, and the through hole 11c-3 are formed at positions facing each other in a state where the first plate-shaped body and the second plate-shaped body are laminated, and communicate with each other. It is designed to do. In the third flow path 11C, the refrigerant flows in the direction opposite to the refrigerant flowing in the second flow path 11A.

A through hole 11d serving as a second branch flow path 11D is formed at a position of the through hole 11c-3 opposite to the through hole 11c-2. Then, the third flow path 11C communicates with the center of the second branch flow path 11D.

The second branch flow path 11D is formed by the through hole 11d. That is, the second branch flow path 11D communicates with the third flow path 11C and branches the third flow path 11C into a plurality of flow paths. Therefore, the refrigerant flowing through the third flow path 11C is branched into two in the vertical direction of the paper surface in the second branch flow path 11D. The second branch flow path 11D turns back the flow of the refrigerant. A fourth flow path 12A is communicated with both ends of the second branch flow path 11D.

The fourth flow path 12A is a straight line extending in the stacking direction of the first plate-shaped body and the second plate-shaped body by communicating the through hole 12a-1, the through hole 12a-2, and the through hole 12a-3. Formed into a shape. That is, the through hole 12a-1, the through hole 12a-2, and the through hole 12a-3 are formed at positions facing each other in a state where the first plate-shaped body and the second plate-shaped body are laminated, and communicate with each other. It is designed to do. In the fourth flow path 12A, the refrigerant flows in the direction opposite to the refrigerant flowing in the third flow path 11C.

A through hole 12b serving as a second folded flow path 12B is formed at a position of the through hole 12a-3 opposite to the through hole 12a-2. Then, the fourth flow path 12A communicates with one end of the second folded flow path 12B.

The second folded flow path 12B is formed by a through hole 12b extending in the longitudinal direction of the first plate-shaped body 112. The refrigerant flowing through the fourth folded flow path 12A flows in from one end of the second folded flow path 12B, flows in the flow direction of the first plate-shaped body 112, and flows out from the other end of the second folded flow path 12B. To do. In the second folded flow path 12B, the fourth flow path 12A is communicated with one end and the fifth flow path 12C is communicated with the other end, so that the flow of the refrigerant is folded back. The longitudinal direction of the first plate-shaped body 112 is the vertical direction of the paper surface of the first plate-shaped body 112.

The fifth flow path 12C is formed by the through hole 12c in a linear shape extending in the stacking direction of the first plate-shaped body and the second plate-shaped body. That is, the through hole 12c is a position facing the other end of the second folded flow path 12B and the center of the third branch flow path 12D in a state where the first plate-shaped body and the second plate-shaped body are laminated. It is formed in and communicates with each other. In the fifth flow path 12C, the refrigerant flows in the direction opposite to the refrigerant flowing in the fourth flow path 12A.

The third branch flow path 12D is formed by the through hole 12d. That is, the third branch flow path 12D communicates with the fifth flow path 12C and branches the fifth flow path 12C into a plurality of flow paths. Therefore, the refrigerant flowing through the fifth flow path 12C is branched into two in the vertical direction of the paper surface in the third branch flow path 12D. A sixth flow path 13A is communicated with both ends of the third branch flow path 12D.
In the third branch flow path 12D, the flow of the refrigerant is not turned back.

The sixth flow path 13A is formed by communicating the through holes 13a-1, the through holes 13a-2, the through holes 13a-3, and the through holes 13a-4 to form the first plate-like body and the second plate-like body. It is formed in a linear shape extending in the stacking direction. That is, the through hole 13a-1, the through hole 13a-2, the through hole 13a-3, and the through hole 13a-4 are located at positions facing each other in a state where the first plate-shaped body and the second plate-shaped body are laminated. They are formed and communicate with each other. In the sixth flow path 13A, the refrigerant flows in the same direction as the refrigerant flowing in the fifth flow path 12C.
The through holes 13a-1 are formed at opposite positions at both ends of the through holes 12d.

The first plate-shaped body and the second plate-shaped body are processed by pressing or cutting. When the first plate-shaped body and the second plate-shaped body are processed by press working, it is preferable to use a plate material having a thickness of 5 mm or less that can be pressed. Further, when the first plate-like body and the second plate-like body are processed by cutting, a plate material having a thickness of 5 mm or more may be used.

The refrigerant pipe 20A is connected to the first flow path 10A of the laminated header 2 via the refrigerant inflow portion 2A. The through hole 10a-1 constituting the first flow path 10A corresponds to the refrigerant inflow portion 2A in FIG.
The heat transfer tube 4 is connected to the sixth flow path 13A of the laminated header 2 via the refrigerant outflow portion 2B. The through holes 13a-4 constituting the sixth flow path 13A correspond to the refrigerant outflow portion 2B in FIG.

Here, when the first plate-shaped body and the second plate-shaped body are laminated to form the distribution flow path, the first flow is placed in the center of the first branch flow path 10B formed in the first plate-shaped body 114. Road 10A will be communicated.
Further, when the first plate-shaped body and the second plate-shaped body are laminated to form a distribution flow path, the second flow path 11A is communicated with both ends of the first branch flow path 10B.

In this way, in the laminated header 2, the first plate-shaped body and the second plate-shaped body are laminated and brazed so that the through holes are communicated with each other to form a distribution flow path.

<Flow of refrigerant in laminated header 2>
Next, the distribution flow path of the laminated header 2 and the flow of the refrigerant will be described.
FIG. 5 is a vertical cross-sectional view for explaining the flow of the refrigerant in the laminated header 2. In FIG. 5, the flow of the refrigerant is indicated by solid arrows a to m. Further, in FIG. 5, the upper half of the paper surface of the laminated header 2 is enlarged and shown schematically.

When the heat exchanger 1 functions as an evaporator, the gas-liquid two-phase state refrigerant flowing through the refrigerant pipe 20A passes through the through hole 10a-1 of the first plate-shaped body 111 that functions as the refrigerant inflow portion 2A, and the laminated header 2 Inflows into the interior of (arrow a). The refrigerant flowing into the laminated header 2 travels straight through the first flow path 10A (arrow b) and collides with the surface of the second plate-like body 124 at the first branch flow path 10B of the first plate-like body 114. , Divergates up and down in the direction of gravity (arrow c). The refrigerant diverted in the first branch flow path 10B proceeds to both ends of the first branch flow path 10B and flows into the pair of second branch flow paths 11A.

The refrigerant flowing into the second flow path 11A goes straight through the second flow path 11A in a direction facing the refrigerant traveling through the first flow path 10A (arrow d). The flow of the refrigerant is folded back by the first folded flow path 11B of the first plate-shaped body 112. That is, the first folded flow path 11B collides with the surface of the second plate-like body 121 and changes the flow direction (arrow e). The refrigerant that has flowed into the first folded flow path 11B proceeds to the end of the first folded flow path 11B and flows into the third flow path 11C.

The refrigerant flowing into the third flow path 11C goes straight through the third flow path 11C in the same direction as the refrigerant traveling in the first flow path 10A (arrow f). This refrigerant collides with the surface of the second plate-shaped body 124 in the second branch flow path 11D of the first plate-shaped body 114, and splits up and down in the direction of gravity (arrow g). The refrigerant diverted in the second branch flow path 11D proceeds to both ends of the second branch flow path 11D and flows into a pair of fourth flow paths 12A formed for one second branch flow path 11D.

The refrigerant flowing into the fourth flow path 12A goes straight through the fourth flow path 12A in the same direction as the refrigerant traveling through the second flow path 11A (arrow h). This refrigerant collides with the surface of the second plate-shaped body 121 in the second folded flow path 12B of the first plate-shaped body 112, and changes the direction of flow (arrow i). The refrigerant that has flowed into the second folded flow path 12B proceeds to the end of the second folded flow path 12B and flows into the fifth folded flow path 12C. The refrigerant flowing into the fifth flow path 12C goes straight through the fifth flow path 12C in the same direction as the refrigerant traveling in the first flow path 10A (arrow j). This refrigerant collides with the surface of the second plate-shaped body 123 at the third branch flow path 12D of the first plate-shaped body 113, and splits up and down in the direction of gravity (arrow k). The refrigerant diverted in the third branch flow path 12D proceeds to both ends of the third branch flow path 12D and flows into the pair of sixth flow paths 13A formed for one third branch flow path 12D.

The refrigerant flowing into the sixth flow path 13A goes straight through the sixth flow path 13A in a direction facing the refrigerant traveling in the fourth flow path 12A (arrow l). Then, the refrigerant flowing through the sixth flow path 13A flows out from the sixth flow path 13A (arrow m) and is uniformly distributed to the plurality of heat transfer tubes 4 via the flow paths of the holding member 5.
In the first embodiment, the case where the refrigerant passes through the branch flow path three times and is branched into eight branches has been described as an example, but the number of branches of the refrigerant is not particularly limited.

<Regarding the state of the liquid film in the distribution flow path in the laminated header>
Here, the state of the liquid film in the laminated header 2 will be described.
The distribution flow path of the laminated header 2 is bent at a right angle and repeats a plurality of branches to reach a plurality of refrigerant outflow portions 2B. When the refrigerant flows through the distribution flow path, a large amount of a liquid film of the refrigerant is present at the bent portion and the branch portion of the flow path, which are biased toward the outside of the flow path due to centrifugal force. If the refrigerant flows into the next branch flow path in this state, a large amount of liquid refrigerant flows into one of the branch flow paths, and the gas-liquid two-phase refrigerant cannot be uniformly distributed to the plurality of heat transfer tubes 4. become.

Therefore, in the laminated header 2, a straight portion having a constant length is formed from the bent portion and the branch portion of the flow path to the flow into the next branch flow path. Specifically, the first flow path 10A, the second flow path 11A, the third flow path 11C, the fourth flow path 12A, and the fifth flow path 12C are made longer than the thickness of one plate-like body. It is composed. By doing so, a straight portion of the refrigerant can be secured, and the bias of the liquid film is made uniform during this period. Therefore, it is possible to prevent the refrigerant from being biased to one side in the next branch flow path, and the gas-liquid two-phase refrigerant is uniformly distributed in all the branch flow paths. In addition, since the laminated header 2 includes the first folded flow path 11B and the second folded flow path 12B, it is possible to evenly distribute the gas-liquid two-phase refrigerant while realizing miniaturization.

Further, the laminated header 2 has other branch flow paths in the second flow path 11A, the first turn-back flow path 11B, and the third flow path 11C from the first branch flow path 10B to the second branch flow path 11D. Does not form. That is, in the laminated header 2, the refrigerant branched in the first branch flow path 10B is folded back in the opposite direction by the first turn-back flow path 11B to reach the second branch flow path 11D.

Similarly, the laminated header 2 provides a branch flow path in the fourth flow path 12A, the second folded flow path 12B, and the fifth branch flow path 12C from the second branch flow path 11D to the third branch flow path 12D. Not formed. That is, in the laminated header 2, the refrigerant branched in the second branch flow path 11D is folded back in the opposite direction by the second folded flow path 12B to reach the third branch flow path 12D.

With such a configuration, in the laminated header 2, a long approach distance from the branch point to the branch point can be secured, and the amount of refrigerant after branching can be equalized. That is, in the laminated header 2, the flow path from the first branch flow path 10B, which is the first branch point, to the second branch flow path 11D, which is the next branch point, is twice the thickness of the four plate-like bodies. It can be made longer than that, and a straight portion of the refrigerant can be secured, and the bias of the liquid film can be made uniform during this period.

In the laminated header 2, the first branch flow path 10B and the second branch flow path 11D are formed in the first plate-like body 114 in which eight through holes 13a-2 are formed.
With such a configuration, in the laminated header 2, the distance between the first branch flow path 10B, which is the first branch point, and the second branch flow path 11D, which is the next branch point, for the round trip. Can be. That is, in the laminated header 2, the distance of the flow path from the branch point to the branch point can be secured to be long, and the amount of refrigerant after branching can be equalized.

In the laminated header 2, the eight through holes 13a-2 formed in the first plate-shaped body 114 are formed in groups of two instead of at equal intervals. In the laminated header 2, the distance between the groups is made wider than the distance between the two through holes 13a-2 constituting one group. In the laminated header 2, the through holes 13a-2 have a wide pitch, that is, between the groups, the through holes 10b serving as the first branch flow path 10B and the through holes serving as the second branch flow path 11D. It forms at least one of 11d.

With such a configuration, in the laminated header 2, the first branch flow path 10B and the second branch flow path 11D can be arranged between the sixth flow path 13A, and the first branch flow that becomes the first branch point can be arranged. The linear distance of the flow path from the road 10B to the second branch flow path 11D, which is the next branch point, can be increased. That is, in the laminated header 2, a long approach distance from the branch point to the branch point can be secured, and the rectifying effect of the liquid film can be further improved.
In the first embodiment, the case where both the through hole 10b and the through hole 11d are formed in the first plate-shaped body 114 is shown as an example, but either one may be formed in another plate-shaped body. ..

In the laminated header 2, the second branch flow path 11D is formed on the through hole 13a-2 side of the position of the third branch flow path 12D.
With such a configuration, in the laminated header 2, the approach distance from the second branch flow path 11D to the third branch flow path 12D can be secured for a long time, and the rectifying effect of the liquid film can be further improved. Can be done.

Embodiment 2.
Hereinafter, an example of the usage mode of the heat exchanger 1 according to the first embodiment will be described as the second embodiment of the present invention. In the second embodiment, the air conditioner 100 provided with the heat exchanger 1 according to the first embodiment will be described as an example of the refrigeration cycle device. However, the case is not limited to the case where the heat exchanger 1 is provided in the air conditioner 100, and for example, another refrigeration cycle device having a refrigerant circulation circuit may be provided with the heat exchanger 1. Further, although the case where the air conditioner 100 can switch between the cooling operation and the heating operation is described, the case is not limited to such a case, and even if the air conditioner 100 performs only the cooling operation or the heating operation. Good. In this case, it is not necessary to provide the four-way valve 22.

<Structure of air conditioner 100>
FIG. 6 is a circuit configuration diagram schematically showing an example of a refrigerant circuit configuration of the air conditioner 100, which is an example of the refrigeration cycle device according to the second embodiment of the present invention. In the second embodiment, the differences from the first embodiment will be mainly described, and the same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. Further, in FIG. 6, the flow of the refrigerant during the cooling operation is indicated by a broken line arrow, and the flow of the refrigerant during the heating operation is indicated by a solid line arrow.

As shown in FIG. 6, the air conditioner 100 includes a compressor 21, a four-way valve 22, an outdoor heat exchanger 23, a throttle device 24, an indoor heat exchanger 25, an outdoor fan 26, and an indoor fan. 27 and a control device 28.
The compressor 21, the four-way valve 22, the outdoor heat exchanger 23, the throttle device 24, the outdoor fan 26, and the control device 28 are mounted on the heat source side unit. The indoor heat exchanger 25 and the indoor fan 27 are mounted on the load side unit.
The diaphragm device 24 may be mounted on the load side unit. Further, the control device may be mounted on the load side unit. Further, both the heat source side unit and the load side unit may be provided with control devices so that they can communicate with each other.

The compressor 21, the outdoor heat exchanger 23, the throttle device 24, and the indoor heat exchanger 25 are connected by a refrigerant pipe 20 to form a refrigerant circulation circuit. The refrigerant pipe 20 includes the refrigerant pipe 20A and the refrigerant pipe 20B described in the first embodiment.

The compressor 21 compresses the refrigerant. The refrigerant compressed by the compressor 21 is discharged and sent to the outdoor heat exchanger 23 or the indoor heat exchanger 25. The compressor 21 can be composed of, for example, a rotary compressor, a scroll compressor, a screw compressor, a reciprocating compressor, or the like.

The four-way valve 22 switches the flow of the refrigerant between the heating operation and the cooling operation. That is, the four-way valve 22 is switched so as to connect the compressor 21 and the indoor heat exchanger 25 during the heating operation, and is switched so as to connect the compressor 21 and the outdoor heat exchanger 23 during the cooling operation. Instead of the four-way valve 22, a combination of a two-way valve or a three-way valve may be adopted.

The outdoor heat exchanger 23 is used as a heat source side heat exchanger, functions as an evaporator during the heating operation, and functions as a condenser during the cooling operation. That is, when functioning as an evaporator, in the outdoor heat exchanger 23, the low-temperature low-pressure refrigerant flowing out from the throttle device 24 and the air supplied by the outdoor fan 26 exchange heat, and the low-temperature low-pressure liquid refrigerant or two-phase The refrigerant evaporates. On the other hand, when functioning as a condenser, the outdoor heat exchanger 23 exchanges heat between the high-temperature and high-pressure refrigerant discharged from the compressor 21 and the air supplied by the outdoor fan 26, and the high-temperature and high-pressure gas refrigerant condenses. ..
The outdoor fan 26 is used as a heat source side fan to supply air to the outdoor heat exchanger 23.

The throttle device 24 expands and decompresses the refrigerant flowing out from the outdoor heat exchanger 23 or the indoor heat exchanger 25. The throttle device 24 may be composed of, for example, an electric expansion valve whose flow rate of the refrigerant can be adjusted. As the throttle device 24, not only an electric expansion valve but also a mechanical expansion valve using a diaphragm for a pressure receiving portion, a capillary tube, or the like can be applied.

The indoor heat exchanger 25 is used as a load side heat exchanger, functions as a condenser during the heating operation, and functions as an evaporator during the cooling operation. That is, when functioning as a condenser, the indoor heat exchanger 25 exchanges heat between the high-temperature and high-pressure refrigerant discharged from the compressor 21 and the air supplied by the indoor fan 27, and the high-temperature and high-pressure gas refrigerant condenses. .. On the other hand, when functioning as an evaporator, in the indoor heat exchanger 25, the low-temperature low-pressure refrigerant flowing out from the drawing device 24 and the air supplied by the indoor fan 27 exchange heat with each other, and the low-temperature low-pressure liquid refrigerant or two-phase The refrigerant evaporates.
The indoor fan 27 is used as a load-side fan to supply air to the indoor heat exchanger 25.

The control device 28 controls the overall operation of the air conditioner 100 in an integrated manner. Specifically, the control device 28 sets each part of the air conditioner 100, that is, the compressor 21, the four-way valve 22, the throttle device 24, the outdoor fan 26, and the indoor fan 27, which are actuators, according to the content of the user operation. Control the operation of. Specifically, an actuator, various sensors (not shown), and the like are connected to the control device 28 to control the operation of the actuator while acquiring temperature information and pressure information for operation according to the content of user operation. And execute. For example, the control device 28 switches the flow path of the four-way valve 22, so that the cooling operation and the heating operation can be switched.

The control device 28 can be configured by hardware such as a circuit device that realizes the function, or can be configured by a computing device such as a microcomputer and software executed on the arithmetic unit.

<Operation of air conditioner 100>
Next, the operation of the air conditioner 100 will be described together with the flow of the refrigerant.
First, the cooling operation executed by the air conditioner 100 will be described. The flow of the refrigerant during the cooling operation is indicated by the broken line arrow in FIG.

By driving the compressor 21, the high-temperature and high-pressure gas-state refrigerant is discharged from the compressor 21. Hereinafter, the refrigerant flows according to the broken line arrow. The high-temperature and high-pressure gas refrigerant discharged from the compressor 21 flows into the outdoor heat exchanger 23 that functions as a condenser via the four-way valve 22. In the outdoor heat exchanger 23, heat exchange is performed between the inflowing high-temperature and high-pressure gas refrigerant and the air supplied by the outdoor fan 26, and the high-temperature and high-pressure gas refrigerant is condensed into a high-pressure liquid refrigerant. Become.

The high-pressure liquid refrigerant flowing out of the outdoor heat exchanger 23 becomes a low-pressure gas-liquid two-phase refrigerant by the throttle device 24. The low-pressure gas-liquid two-phase refrigerant flows into the indoor heat exchanger 25 that functions as an evaporator. In the indoor heat exchanger 25, heat exchange is performed between the inflowing gas-liquid two-phase refrigerant and the air supplied by the indoor fan 27, and the liquid refrigerant in the two-phase state refrigerant evaporates to a low pressure. Becomes a gas refrigerant. At this time, the heat-exchanged air is supplied to the air-conditioned space by the indoor fan 27, so that the air-conditioned space is cooled.

The low-pressure gas refrigerant flowing out of the indoor heat exchanger 25 flows into the compressor 21 via the four-way valve 22, is compressed, becomes a high-temperature and high-pressure gas refrigerant, and is discharged from the compressor 21 again. Hereinafter, this cycle is repeated.

Next, the heating operation executed by the air conditioner 100 will be described. The flow of the refrigerant during the heating operation is indicated by the solid arrow in FIG.

By driving the compressor 21, the high-temperature and high-pressure gas-state refrigerant is discharged from the compressor 21. Hereinafter, the refrigerant flows according to the solid arrow. The high-temperature and high-pressure gas refrigerant discharged from the compressor 21 flows into the indoor heat exchanger 25 that functions as a condenser via the four-way valve 22. In the indoor heat exchanger 25, heat exchange is performed between the inflowing high-temperature and high-pressure gas refrigerant and the air supplied by the indoor fan 27, and the high-temperature and high-pressure gas refrigerant is condensed into a high-pressure liquid refrigerant. Become. At this time, the heat-exchanged air is supplied to the air-conditioned space by the indoor fan 27, so that the air-conditioned space is heated.

The high-pressure liquid refrigerant sent out from the indoor heat exchanger 25 becomes a low-pressure gas-liquid two-phase refrigerant by the throttle device 24. The low-pressure gas-liquid two-phase refrigerant flows into the outdoor heat exchanger 23 that functions as an evaporator. In the outdoor heat exchanger 23, heat exchange is performed between the inflowing gas-liquid two-phase refrigerant and the air supplied by the outdoor fan 26, and the liquid refrigerant in the two-phase state refrigerant evaporates to a low pressure. Becomes a gas refrigerant.

The low-pressure gas refrigerant flowing out of the outdoor heat exchanger 23 flows into the compressor 21 via the four-way valve 22, is compressed, becomes a high-temperature and high-pressure gas refrigerant, and is discharged from the compressor 21 again. Hereinafter, this cycle is repeated.

In the air conditioner 100, the heat exchanger 1 according to the first embodiment may be used for at least one of the outdoor heat exchanger 23 and the indoor heat exchanger 25, but as shown in FIG. 6, the outdoor heat exchanger 23 and the indoor heat exchanger 25 and the indoor heat exchanger 25 may be used. The heat exchanger 1 according to the first embodiment may be used for both of the indoor heat exchangers 25.

When the heat exchanger 1 according to the first embodiment acts as an evaporator, the refrigerant flows in from the laminated header 2 and is connected to the cylindrical header 3 so as to flow out. That is, when the heat exchanger 1 acts as an evaporator, the refrigerant in a gas-liquid two-phase state flows from the refrigerant pipe 20 into the laminated header 2, branches and flows into each heat transfer tube 4 of the heat exchanger 1. .. Further, when the heat exchanger 1 acts as a condenser, the liquid refrigerant flows into the laminated header 2 from each heat transfer tube 4 and merges with the liquid refrigerant and flows out to the refrigerant pipe 20.

Therefore, according to the air conditioner 100, since the heat exchanger 1 according to the first embodiment is used for at least one of the outdoor heat exchanger 23 and the indoor heat exchanger 25, the laminated header 2 makes it uniform. The gas-liquid two-phase refrigerant is distributed, and the heat exchange efficiency is improved.

The refrigerant used in the air conditioner 100 is not particularly limited, and the effect can be exhibited even if a refrigerant such as R410A, R32, or HFO1234yf is used.
Further, the example of the working fluid is air and a refrigerant, but the present invention is not limited to this, and the same effect can be obtained by using another gas, liquid, or gas-liquid mixed fluid. In other words, the working fluid changes, and in any case, it is effective.
Further, other examples of the refrigeration cycle device include a water heater, a refrigerator, an air-conditioning hot water supply compound machine, and the like, and in any case, the heat exchange efficiency is improved.

1 heat exchanger, 2 laminated header, 2A refrigerant inflow part, 2B refrigerant outflow part, 3 cylindrical header, 3A refrigerant inflow part, 3B refrigerant outflow part, 4 heat transfer tube, 4A one end, 4B other end, 5 holding Member, 6 fins, 10A 1st flow path, 10a-1 through hole, 10a-2 through hole, 10a-3 through hole, 10a-4 through hole, 10a-5 through hole, 10a-6 through hole, 10B 1st Branch flow path, 10b through hole, 11A second flow path, 11a-1 through hole, 11a-2 through hole, 11a-3 through hole, 11B first turn-back flow path, 11b
Through hole, 11C 3rd flow path, 11c-1 through hole, 11c-2 through hole, 11c-3 through hole, 11D 2nd branch flow path, 11d through hole, 12A 4th flow path, 12a-1 through hole, 12a-2 through hole, 12a-3 through hole, 12B second folded flow path, 12b through hole, 12C fifth flow path, 12c through hole, 12D third branch flow path, 12d through hole, 13A sixth flow path, 13a-1 through hole, 13a-2 through hole, 13a-3 through hole, 13a-4 through hole, 20 refrigerant pipe, 20A refrigerant pipe, 20B refrigerant pipe, 21 compressor, 22 four-way valve, 23 outdoor heat exchanger, 24 Squeezing device, 25 Indoor heat exchanger, 26 Outdoor fan, 27 Indoor fan, 28 Control device, 100 Air conditioner, 111 1st plate, 112 1st plate, 113 1st plate, 114th 1 plate-shaped body, 115 1st plate-shaped body, 121 2nd plate-shaped body, 122 2nd plate-shaped body, 123 2nd plate-shaped body, 124 2nd plate-shaped body.

Claims (9)

One first opening and
With multiple second openings,
It has a distribution flow path that communicates the first opening and the plurality of second openings.
A laminated header formed by laminating a plurality of plate-like bodies.
The distribution channel is
A linear first flow path that communicates with the first opening and extends in the stacking direction of the plurality of plate-like bodies.
A first branch flow path that communicates with the first flow path and branches the first flow path into a plurality of flow paths.
A plurality of linearly shaped second flow paths that communicate with the first branch flow path and extend in the stacking direction of the plurality of plate-like bodies.
A first folded flow path that communicates with each of the plurality of second flow paths and extends in the longitudinal direction of the same plate-like body,
A plurality of linear third flow paths that communicate with the first folded flow path and extend in the stacking direction of the plurality of plate-like bodies.
A second branch flow path that communicates with each of the plurality of third flow paths and branches each of the plurality of third flow paths into a plurality of flow paths.
A plurality of linear fourth flow paths that communicate with the second branch flow path and extend in the stacking direction of the plurality of plate-like bodies.
A second folded flow path that communicates with each of the plurality of fourth flow paths and extends in the longitudinal direction of the same plate-like body,
A plurality of linear fifth flow paths that communicate with the second folded flow path and extend in the stacking direction of the plurality of plate-like bodies.
A third branch flow path that communicates with each of the plurality of fifth flow paths and branches each of the plurality of fifth flow paths into a plurality of flow paths.
Includes a plurality of linear sixth flow paths that communicate with each of the third branch flow paths and extend in the stacking direction of the plurality of plate-like bodies.
The plurality of second flow paths and the plurality of fourth flow paths are
The refrigerant flows in the direction opposite to the flow of the refrigerant flowing through the first flow path, the plurality of third flow paths, the plurality of fifth flow paths, and the sixth flow path.
The through holes forming the sixth flow path are arranged as a group of two through holes communicating with the same third branch flow path.
A laminated header in which at least one of a through hole forming the first branch flow path and a through hole forming the second branch flow path is formed between groups. One first opening and
With multiple second openings,
It has a distribution flow path that communicates the first opening and the plurality of second openings.
A laminated header formed by laminating a plurality of plate-like bodies.
The distribution channel is
A linear first flow path that communicates with the first opening and extends in the stacking direction of the plurality of plate-like bodies.
A first branch flow path that communicates with the first flow path and branches the first flow path into a plurality of flow paths.
A plurality of linearly shaped second flow paths that communicate with the first branch flow path and extend in the stacking direction of the plurality of plate-like bodies.
A first folded flow path that communicates with each of the plurality of second flow paths and extends in the longitudinal direction of the same plate-like body,
A plurality of linear third flow paths that communicate with the first folded flow path and extend in the stacking direction of the plurality of plate-like bodies.
A second branch flow path that communicates with each of the plurality of third flow paths and branches each of the plurality of third flow paths into a plurality of flow paths.
A plurality of linear fourth flow paths that communicate with the second branch flow path and extend in the stacking direction of the plurality of plate-like bodies.
A second folded flow path that communicates with each of the plurality of fourth flow paths and extends in the longitudinal direction of the same plate-like body,
A plurality of linear fifth flow paths that communicate with the second folded flow path and extend in the stacking direction of the plurality of plate-like bodies.
A third branch flow path that communicates with each of the plurality of fifth flow paths and branches each of the plurality of fifth flow paths into a plurality of flow paths.
Includes a plurality of linear sixth flow paths that communicate with each of the third branch flow paths and extend in the stacking direction of the plurality of plate-like bodies.
The plurality of second flow paths and the plurality of fourth flow paths are
The refrigerant flows in the direction opposite to the flow of the refrigerant flowing through the first flow path, the plurality of third flow paths, the plurality of fifth flow paths, and the sixth flow path.
The second branch flow path is
A laminated header formed on the plurality of second opening sides of the position of the third branch flow path. The first flow path, the second flow path, the third flow path, the fourth flow path, and the fifth flow path are
The laminated header according to claim 1 or 2, which is configured to be longer than the thickness of one of the plurality of plate-like bodies. The distribution channel is
The refrigerant branched in the first branch flow path is configured to reach the second branch flow path without being branched in the second flow path, the first turn-back flow path, and the third flow path. The laminated header according to any one of claims 1 to 3. The distribution channel is
The refrigerant branched in the second branch flow path is configured to reach the third branch flow path without being branched in the fourth flow path, the second folded flow path, and the fifth flow path. The laminated header according to any one of claims 1 to 4. The through hole forming the first branch flow path and the through hole forming the second branch flow path have the same plate shape as the plate-like body in which a part of the through hole forming the sixth branch flow path is formed. The laminated header according to any one of claims 1 to 5, which is formed on the body. The laminated header according to claim 1, wherein the distance between the groups is wider than the distance between the two through holes constituting one group. The laminated header according to any one of claims 1 to 7,
A plurality of heat transfer tubes connected to each of the plurality of second openings,
A heat exchanger equipped with. A refrigeration cycle apparatus comprising the heat exchanger according to claim 8 as at least one of an evaporator and a condenser.

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