WO2020217308A1

WO2020217308A1 - Plate heat exchanger

Info

Publication number: WO2020217308A1
Application number: PCT/JP2019/017200
Authority: WO
Inventors: 田中　信雄
Original assignee: 株式会社日阪製作所
Priority date: 2019-04-23
Filing date: 2019-04-23
Publication date: 2020-10-29
Also published as: CN113424010B; JP7300500B2; EP3951309A4; CN113424010A; EP3951309A1; JPWO2020217308A1

Abstract

The present invention addresses the problem of providing a plate heat exchanger such that it is possible to suppress the uneven distribution of first fluid to a plurality of first flow paths. The present invention comprises a group of flow path formation members that extend in a predetermined direction at positions corresponding to the through holes of a plurality of heat exchanger plates. The group of flow path formation members is composed of the plurality of flow path formation members that are arranged in a row in the predetermined direction, and the through holes of at least two flow path formation members communicate with each other to form a first fluid supply path that supplies the first fluid to the first flow paths. The first fluid supply path includes: an introduction portion into which the first fluid is introduced from the outside; a first branch portion that is disposed at an intermediate portion of the plurality of heat exchanger plates and separates the first fluid introduced into the introduction portion into one side and the other side in the predetermined direction; and a plurality of opening portions that communicate with one side or the other side of the first branch portion and open into the corresponding first flow path at a plurality of locations in the predetermined direction.

Description

Plate heat exchanger

The present invention relates to a plate heat exchanger used as an evaporator or a condenser.

Conventionally, plate heat exchangers have been widely used as evaporators for evaporating fluids and condensers for condensing fluids (see Japanese Patent Application Laid-Open No. 11-287572).

The plate heat exchanger includes a plurality of heat transfer plates 101 as shown in FIGS. 17 to 19. In this plate heat exchanger 100, a plurality of heat transfer plates 101 are superposed in the X-axis direction to flow a first fluid A to be evaporated or condensed, and a first flow path Ra and a first fluid A. A second flow path Rb through which a second fluid B (second fluid B to be heat exchanged with the first fluid A) for evaporating or condensing is formed. Further, by superimposing the plurality of heat transfer plates 101 in the X-axis direction, the first fluid supply path Ra1 communicating with only the first flow path Ra and allowing the first fluid A to flow into the first flow path Ra, and the first flow. The first fluid discharge path Ra2 that communicates only with the path Ra and causes the first fluid A to flow out from the first flow path Ra, and the second fluid B that communicates only with the second flow path Rb and flows into the second flow path Rb. A second fluid supply path Rb1 and a second fluid discharge path Rb2 that communicates only with the second flow path Rb and allows the second fluid B to flow out from the second flow path Rb are formed.

More specifically, each of the plurality of heat transfer plates 101 has a first surface in the X-axis direction and a second surface on the opposite side of the first surface. A plurality of recesses and ridges (not numbered) are formed on each of the first surface and the second surface of the heat transfer plate 101.

Each of the plurality of heat transfer plates 101 has a first hole 102 penetrating in the X-axis direction, a second hole 103 penetrating in the X-axis direction, and a third hole 104 penetrating in the X-axis direction at different positions. It has a fourth hole 105 penetrating in the X-axis direction. The first hole 102 is arranged at one end of the heat transfer plate 101 on the one end side in the Y-axis direction orthogonal to the X-axis direction in the Z-axis direction orthogonal to the X-axis direction and the Y-axis direction. The second hole 103 is arranged at one end in the Z-axis direction in the region on the other end side in the Y-axis direction of the heat transfer plate 101. The third hole 104 is arranged at the other end of the heat transfer plate 101 on the other end side in the Y-axis direction in the Z-axis direction. The fourth hole 105 is arranged at the other end of the heat transfer plate 101 on the one end side in the Y-axis direction in the Z-axis direction (see FIG. 17).

Along with this, the plurality of heat transfer plates 101 are overlapped with each other, so that the ridges of the adjacent heat transfer plates 101 intersect with each other, whereby the first flow path Ra or the first flow path Ra or the first flow path Ra or the first flow path Ra or the second between the adjacent heat transfer plates 101. Two flow paths Rb are formed. In the plate heat exchanger 100, the first flow path Ra and the second flow path Rb are alternately formed with the heat transfer plate 101 as a boundary.

Further, the first holes 102 of the plurality of heat transfer plates 101 are connected in the X-axis direction to form the first fluid supply path Ra1. Further, the second holes 103 of the plurality of heat transfer plates 101 are connected in the X-axis direction to form the first fluid discharge path Ra2. Further, the third holes 104 of the plurality of heat transfer plates 101 are connected in the X-axis direction to form the second fluid supply path Rb1. Further, the fourth holes 105 of the plurality of heat transfer plates 101 are connected in the X-axis direction to form the second fluid discharge path Rb2.

Along with this, in the plate heat exchanger 100, the first fluid A supplied to the first fluid supply path Ra1 flows out to the first fluid discharge path Ra2 through the first flow path Ra. Further, the second fluid B supplied to the second fluid supply path Rb1 flows out to the second fluid discharge path Rb2 through the second flow path Rb. As a result, the first fluid A and the second fluid B exchange heat via the heat transfer plate 101 that separates the first flow path Ra and the second flow path Rb.

By the way, in the plate type heat exchanger 100, it is said that as the number of superposed heat transfer plates 101 increases, the heat transfer area that contributes to heat exchange becomes wider, so that the heat exchange performance becomes higher.

However, as the number of heat transfer plates 101 increases, the lengths of the first fluid supply path Ra1, the first fluid discharge path Ra2, the second fluid supply path Rb1, and the second fluid discharge path Rb2 in the X-axis direction become longer. , It becomes longer according to the number of heat transfer plates 101 to be overlapped.

That is, the first fluid supply path Ra1 is formed by connecting the first holes 102 of the plurality of heat transfer plates 101. Further, the first fluid discharge path Ra2 is formed by connecting the second holes 103 of the plurality of heat transfer plates 101. Further, the second fluid supply path Rb1 is formed by connecting the third holes 104 of the plurality of heat transfer plates 101. Further, the second fluid discharge path Rb2 is formed by connecting the fourth holes 105 of the plurality of heat transfer plates 101. Therefore, each of the flow path lengths of the first fluid supply path Ra1, the first fluid discharge path Ra2, the second fluid supply path Rb1, and the second fluid discharge path Rb2 has a large number of heat transfer plates 101 to be overlapped with each other. If so, it will be longer according to the number.

As a result, when the number of the heat transfer plates 101 ... To be overlapped increases, the flow resistance of the first fluid A in the first fluid supply path Ra1 for flowing the first fluid A into the first flow path Ra increases. It becomes difficult for the first fluid A to circulate in the one fluid supply path Ra1. Therefore, in the plate heat exchanger 100, the inflow amount of the first fluid A into the first flow path Ra on the inlet side of the first fluid supply path Ra1 and the inflow amount of the first fluid A into the first flow path Ra on the back side of the first fluid supply path Ra1. The inflow amount of the first fluid A becomes non-uniform.

That is, in the plate heat exchanger 100, uneven distribution of the first fluid A occurs with respect to a plurality of first flow paths Ra arranged in the X-axis direction. As a result, in the plate heat exchanger 100, even if the number of heat transfer plates 101 is increased (even if the number of first flow paths Ra is increased), the heat exchange performance (evaporation performance or condensation performance) can be improved. There is a limit.

Japanese Patent Application Laid-Open No. 11-287572

Therefore, it is an object of the present invention to provide a plate heat exchanger capable of suppressing uneven distribution of the first fluid with respect to a plurality of first flow paths.

The plate heat exchanger according to the present invention
A plurality of heat transfer plates having through holes penetrating in a predetermined direction at positions corresponding to each other, and by being overlapped in the predetermined direction, a first flow path through which the first fluid flows and a second flow path through which the second fluid flows. A plurality of heat transfer plates that alternately form a flow path in the predetermined direction with each of the plurality of heat transfer plates as a boundary.
A group of flow path forming members extending in a predetermined direction at positions corresponding to the through holes of the plurality of heat transfer plates are provided.
The flow path forming member group is composed of a plurality of flow path forming members connected in a predetermined direction.
At least two of the plurality of flow path forming members have through holes penetrating the flow path forming member in the predetermined direction.
The through holes of the at least two flow path forming members form a first fluid supply path for supplying the first fluid to the first flow path by communicating with each other.
The first fluid supply path is
An introduction part that extends in the predetermined direction and the first fluid is introduced from the outside,
A first branch portion arranged in an intermediate portion of the plurality of heat transfer plates arranged in a predetermined direction and branching the first fluid introduced into the introduction portion into one side and the other side in the predetermined direction.
An open portion that directly or indirectly communicates with the one side or the other side of the first branch portion, and a plurality of open portions that open toward the corresponding first flow path at a plurality of locations in the predetermined direction. ,including.

In the plate heat exchanger,
Each of the plurality of flow path forming members may be sandwiched around the through hole of two heat transfer plates of the plurality of heat transfer plates.

Further, in the plate heat exchanger,
The first fluid supply path is between the first branch portion and the plurality of open portions communicating with the one side of the first branch portion, and the first branch portion and the first branch portion. At least one second branch portion that branches the first fluid into one side and the other side in the predetermined direction may be provided between the plurality of open portions communicating with the other side.

FIG. 1 is an overall perspective view of a plate heat exchanger according to an embodiment of the present invention. FIG. 2 is a schematic exploded perspective view of the plate heat exchanger according to the embodiment. FIG. 3 is a schematic view of one of the two types of heat transfer plates of the plate heat exchanger according to the same embodiment as viewed from the front surface side. FIG. 4 is a schematic view of one of the two types of heat transfer plates of the plate heat exchanger according to the same embodiment as viewed from the second surface side. FIG. 5 is a schematic view of the other heat transfer plate of the two types of heat transfer plates of the plate heat exchanger according to the same embodiment as viewed from the second surface side. FIG. 6 is a schematic view of the heat transfer plate of the other of the two types of heat transfer plates of the plate heat exchanger according to the same embodiment as viewed from the front surface side. FIG. 7 is a perspective view showing a state in which a plurality of flow path forming members included in the plate heat exchanger according to the same embodiment are arranged in the X-axis direction. FIG. 8 is an external front view showing only a common configuration of a plurality of flow path forming members included in the plate heat exchanger according to the embodiment. FIG. 9 is an external side view showing only a common configuration of a plurality of flow path forming members included in the plate heat exchanger according to the embodiment. FIG. 10 is a cross-sectional view taken along the line XX of FIG. 1 with a flow of the first fluid added. FIG. 11 is a cross-sectional view taken along the line XI-XI of FIG. 1 in which a flow of the second fluid is added. FIG. 12 is a perspective view of a state in which a plurality of flow path forming members included in the plate heat exchanger according to the same embodiment are arranged in the X-axis direction, and is a view to which a flow of the first fluid is added. FIG. 13 is a perspective view showing a state in which a plurality of flow path forming members included in the plate heat exchanger according to another embodiment of the present invention are arranged in the X-axis direction. FIG. 14 is an external front view showing only a common configuration of a plurality of flow path forming members included in the plate heat exchanger according to another embodiment. FIG. 15 is a cross-sectional view of the plate heat exchanger according to the other embodiment, in which the flow of the first fluid is added. FIG. 16 is a cross-sectional view of a plate heat exchanger according to another embodiment of the present invention, in which a flow of a first fluid is added. FIG. 17 is a schematic exploded perspective view of a conventional plate heat exchanger. FIG. 18 is a cross-sectional view of a conventional plate heat exchanger with a flow of the first fluid added. FIG. 19 is a cross-sectional view of a conventional plate heat exchanger with a flow of a second fluid added.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the plate heat exchanger according to the present embodiment includes a plurality of

heat transfer plates

2 and 3 stacked in the X-axis direction (first direction), which is a predetermined direction. As shown in FIG. 2, the plate heat exchanger 1 according to the present embodiment has a plurality of flow path forming members 4 arranged between adjacent

heat transfer plates

2 and 3 in addition to the plurality of

heat transfer plates

2 and 3. To be equipped. Further, the plate heat exchanger 1 includes a pair of

end plates

5 and 6 sandwiching a plurality of

heat transfer plates

2 and 3 stacked in the X-axis direction.

As shown in FIGS. 3 to 6, each of the plurality of

heat transfer plates

2 and 3 has a plate body 20 having a first surface Sa and a second surface Sb on the opposite side of the first surface Sa in the X-axis direction. , 30. In the present embodiment, the

heat transfer plates

2 and 3 have annular

fitting portions

21 and 31 connected to the outer periphery of the plate

main bodies

20 and 30 and extending in a direction intersecting the plate

main bodies

20 and 30. Be prepared. In the plate

main bodies

20 and 30 of the

heat transfer plates

2 and 3 of the present embodiment, the first surface Sa and the second surface Sb face opposite sides. That is, in a state where the plurality of

heat transfer plates

2 and 3 are overlapped in the X-axis direction, the first surface Sa of the plate body 20 and the first surface Sa of the plate body 30 face each other, and the plate body 20 The second surface Sb and the second surface Sb of the plate body 30 face each other.

A plurality of

recesses

200, 300 and

protrusions

201, 301 are formed on each of the first surface Sa and the second surface Sb of the plate

main body portions

20 and 30, respectively. In FIGS. 3 to 6, the

concave lines

200 and 300 are represented by broken lines, and the

convex lines

201 and 301 are represented by straight lines between the broken lines.

Each of the plurality of

recesses

200, 300 and

ridges

201, 301 extends in a direction inclined with respect to a virtual line (not shown) extending in the Y-axis direction (second direction) orthogonal to the X-axis direction. The plurality of

recesses

200, 300 and

ridges

201, 301 are alternately arranged in a direction orthogonal to the extending direction thereof. The

heat transfer plates

2 and 3 are press-molded metal plates. The

recesses

200 and 300 of the first surface Sa are in a front-to-back relationship with the

protrusions

201 and 301 of the second surface Sb. The

ridges

201 and 301 of the first surface Sa have a front-back relationship with the

dents

200 and 300 of the second surface Sb.

The plate

main bodies

20 and 30 of the

heat transfer plates

2 and 3 are formed in a rectangular shape when viewed from the X-axis direction. Each of the plate

main bodies

20 and 30 has through

holes

202, 203, 204, 205, 302, 303, 304 and 305 at the four corners, respectively.

More specifically, the plate

main bodies

20 and 30 have

first holes

202 and 302,

second holes

203 and 303,

third holes

204 and 304, and

fourth holes

205 and 305 as through holes. Have. The

first holes

202 and 302 are arranged at one end in the Z-axis direction (third direction) orthogonal to the X-axis direction and the Y-axis direction in the region on one end side in the Y-axis direction in the plate

main bodies

20 and 30. Orthogonal. The

second holes

203 and 303 are arranged at one end in the Z-axis direction in the region on the other end side in the Y-axis direction of the plate

main bodies

20 and 30. The

third holes

204 and 304 are arranged at the other end of the

plate body

20 and 30 on the other end side in the Y-axis direction in the Z-axis direction. The

fourth holes

205 and 305 are arranged at the other end of the plate

main body portions

20 and 30 on the one end side in the Y-axis direction in the Z-axis direction.

In the present embodiment, the

first holes

202, 302, the

second holes

203, 303, the

third holes

204, 304, and the

fourth holes

205, 305 are round holes, respectively. In the present embodiment, the hole diameters of the

second holes

203, 303, the

third holes

204, 304, and the

fourth holes

205, 305 are the same. On the other hand, the hole diameters of the

first holes

202 and 302 are larger than the hole diameters of the

second holes

203 and 303, the

third holes

204 and 304, and the

fourth holes

205 and 305.

In the present embodiment, the periphery of the

first holes

202 and 302 and the periphery of the

second holes

203 and 303 bulge toward the second surface Sb side. That is, the periphery of the

first holes

202 and 302 and the periphery of the

second holes

203 and 303 are recessed on the first surface Sa side. On the other hand, the periphery of the

third holes

204 and 304 and the periphery of the

fourth holes

205 and 305 bulge toward the first surface Sa side. That is, the periphery of the

third holes

204 and 304 and the periphery of the

fourth holes

205 and 305 are recessed on the second surface Sb side.

In the present embodiment, the plurality of

heat transfer plates

2 and 3 include two types of

heat transfer plates

2 and 3. The two types of

heat transfer plates

2 and 3 have different inclination directions of the

recesses

200 and 300 and the

protrusions

201 and 301 of the plate

main bodies

20 and 30, and the extending directions of the annular

fitting portions

21 and 31. Other configurations (shape and size of contours of plate

main bodies

20 and 30 seen from the X-axis direction,

first holes

202, 302,

second holes

203, 303, third seen from the X-axis direction). The arrangement and size of the

holes

204 and 304 and the fourth holes 205 and 305) are common.

Specifically, in the heat transfer plate 2 of one of the two types of

heat transfer plates

2 and 3, the concave groove 200 and the convex groove 201 descend from the middle in the Z-axis direction toward both ends in the Z-axis direction. Tilt to. Further, the annular fitting portion 21 extends toward the second surface Sb side of the plate main body portion 20 (see FIGS. 3 and 4). On the other hand, in the heat transfer plate 3 of the other of the two types of

heat transfer plates

2 and 3, the recesses 300 and the protrusions 301 descend from both ends in the Z-axis direction toward the middle in the Z-axis direction. As it is inclined, the annular fitting portion 31 extends toward the first surface Sa side of the plate main body portion 30 (see FIGS. 5 and 6).

As a result, in the plate heat exchanger 1 according to the present embodiment, two types of heat transfer are performed so that the adjacent

heat transfer plates

2 and 3 face each other on the first surface Sa and face each other on the second surface Sb. By alternately arranging the

plates

2 and 3 in the X-axis direction, the annular

fitting portions

21 and 31 of the adjacent

heat transfer plates

2 and 3 are fitted to each other. At the same time, the

ridges

201 and 301 of the first surfaces Sa of the adjacent

heat transfer plates

2 and 3 intersect with each other, and the

ridges

201 and 301 of the second surfaces Sb of the adjacent

heat transfer plates

2 and 3 intersect. They cross each other.

As shown in FIG. 7, some of the flow path forming members 4 among the plurality of flow path forming members 4 have at least one through hole 42 penetrating in the X-axis direction.

The outer shape of each of the plurality of flow path forming members 4 (the contour seen from the X-axis direction and the contour seen from the direction orthogonal to the X-axis direction) is common. That is, the plurality of flow path forming members 4 have a common configuration other than the number and arrangement of through holes.

I will explain more specifically. As shown in FIGS. 8 and 9, each of the plurality of flow path forming members 4 has a first surface (not numbered) in the X-axis direction and a second surface (not numbered) on the opposite side of the first surface. It has a plate-shaped main body 40 having a portion, and a fitting portion 41 connected to at least one of the first surface and the second surface of the main body 40.

The thickness T1 of the main body 40 in the X-axis direction corresponds to the distance between adjacent heat transfer plates 2 and 3 (see FIG. 9). As shown in FIG. 8, the outer peripheral 400 of the main body 40 of the present embodiment includes an arc portion 400a and a straight portion 400b connecting both ends of the arc portion 400a. The radius r1 of the arc portion 400a is larger than the radius of the

first holes

202 and 302. In the main body portion 40 of the present embodiment, the shortest straight line distance L1 from the center CP1 of the arc portion 400a to the straight line portion 400b is shorter than the radius of the

first holes

202 and 302.

Along with this, in the plate heat exchanger 1 of the present embodiment, the first hole of the main body 40 is in a state where the center of the

holes

202 and 302 and the center CP1 of the arc portion 400a of the main body 40 are aligned with each other. The peripheral edges of the surface and the second surface (portions along the arc portion 400a) overlap with the periphery of the

first holes

202 and 302 of the

heat transfer plates

2 and 3 when viewed from the X-axis direction.

The fitting portion 41 can be fitted into the

first holes

202 and 302 of the

heat transfer plates

2 and 3. More specifically, in the present embodiment, the outer circumference of the fitting portion 41 includes an arc portion 410a and a straight portion 410b connecting both ends of the arc portion 410a. The center CP2 of the arc portion 410a of the fitting portion 41 coincides with the center CP1 of the arc portion 410a of the main body portion 40. That is, the main body portion 40 and the fitting portion 41 are concentric.

The radius r2 of the arc portion 410a of the fitting portion 41 is the same as the radius of the

first holes

202 and 302 or slightly smaller than the radius of the

first holes

202 and 302. In the fitting portion 41, the shortest linear distance L2 from the center CP2 of the arc portion 410a to the straight portion 410b is shorter than the radius of the

first holes

202 and 302. In the present embodiment, the shortest linear distance L2 from the center CP2 of the arc portion 410a of the fitting portion 41 to the straight portion 410b is from the center CP1 of the arc portion 400a of the main body portion 40 to the straight portion 400b of the main body portion 40. It is the same as the shortest straight line distance L1. That is, the straight portion 400b of the main body portion 40 and the straight portion 410b of the fitting portion 41 are continuous in the X-axis direction.

In the flow path forming member 4 of the present embodiment, as shown in FIG. 9, the fitting portion 41 is connected only to the first surface of the main body portion 40. Along with this, the thickness T2 of the fitting portion 41 in the X-axis direction is the total thickness of the two metal plates (press-molded metal plates) constituting the heat transfer plates 2 and 3 (heat transfer overlapping in the X-axis direction). The total thickness around the

first holes

202 and 302 of the plates 2 and 3) is the same or substantially the same.

The common configuration of the plurality of flow path forming members 4 is as described above. As shown in FIG. 7, these plurality of flow path forming members 4 are arranged in a state of being aligned in the X-axis direction. On the premise of this, some of the flow path forming members 4 among the plurality of flow path forming members 4 have at least one through hole 42 penetrating in the X-axis direction according to their own arrangement position. In the plate heat exchanger 1 according to the present embodiment, the flow paths from the flow path forming member 4 side at one end in the X-axis direction of the plurality of flow path forming members 4 aligned in the X-axis direction to the other end. It is assumed that the first fluid A is supplied toward the forming member 4 side. In the present embodiment, the plurality of flow path forming members 4 include a flow path forming member 4 having no through hole as the flow path forming member 4 arranged on the other end side in the X-axis direction.

More specifically, the plurality of flow path forming members 4 are connected in the X-axis direction so as to correspond to the arrangement of the

first holes

202 and 302 of the

heat transfer plates

2 and 3 stacked in the X-axis direction. (See FIG. 2), the flow path forming member group 4A (see FIG. 7) is formed. That is, the flow path forming member group 4A extends in the X-axis direction inside the plate heat exchanger 1 (specifically, at a position corresponding to the

first holes

202 and 302 of the plurality of heat transfer plates 2 and 3). ing. The flow path forming member group 4A is configured by arranging a plurality of flow path forming members 4 so as to be aligned in the X-axis direction inside the plate heat exchanger 1.

On the premise of this, among the member arrangement areas S in which the plurality of flow path forming members 4 aligned in the X-axis direction are arranged, a plurality of flows arranged in one half or substantially half of the area S1 in the X-axis direction. Each of the path forming members 4 has a first through hole 420 arranged at a position corresponding to each other as a through hole 42. That is, among the first region S1 and the second region S2 whose boundary E1 is the middle or substantially the middle of the member arrangement region S in the X-axis direction, a plurality of members in the first region S1 including one end in the X-axis direction. A first through hole 420 is provided in each of the flow path forming members 4. In the present embodiment, the center of the first through hole 420 coincides with the centers CP1 and CP2 of the arc portion 400a of the main body portion 40 and the arc portion 410a of the fitting portion 41.

Of the plurality of flow path forming members 4, the flow path forming member 4 on the boundary E1 between the first region S1 and the second region S2 serves as a through hole 42 in the X-axis direction with respect to the first through hole 420. The second through hole 421 penetrating in the X-axis direction at a position deviated in the orthogonal direction and the third through hole 422 penetrating in the X-axis direction, and communicate the first through hole 420 and the second through hole 421. It has a third through hole 422 and the like. That is, the single flow path forming member (hereinafter referred to as the upstream reference member) 4 located in the intermediate portion of the plurality of

heat transfer plates

2 and 3 in the X-axis direction has the first through hole 420 and the first through hole 420 as the through hole 42. It has two through holes 421 and a third through hole 422.

At least one flow path forming member 4 on each side of the upstream reference member 4 on both sides in the X-axis direction penetrates in the X-axis direction at a position corresponding to the second through hole 421 of the upstream reference member 4. It has four through holes 423.

In the present embodiment, among the plurality of flow path forming members 4 in each of the first region S1 and the second region S2, the plurality of flow path forming members 4 including the flow path forming member 4 adjacent to the upstream reference member 4 A plurality of flow path forming members 4 arranged from the boundary E1 to the intermediate portion in the X-axis direction of the first region S1 and a plurality of flow path forming members 4 arranged from the boundary E1 to the intermediate portion in the X-axis direction of the second region S2. Each of the flow path forming members 4 has a fourth through hole 423.

That is, in each of the first region S1 and the second region S2, the boundary E1 of the member arrangement region S among the third region S3 and the fourth region S4 whose boundary E2 is the middle of the regions S1 and S2 in the X-axis direction. A plurality of flow path forming members 4 ... In the third region S3 adjacent to the above have a fourth through hole 423.

Then, in each of the first region S1 and the second region S2, the flow path forming member 4 located at the boundary E2 serves as a through hole 42 and is X-axis with respect to each of the first through hole 420 and the fourth through hole 423. A fifth through hole 424 penetrating in the X-axis direction at a position deviated in the direction orthogonal to the direction, and a long hole-shaped sixth through hole 425 penetrating in the X-axis direction, the fourth through hole 423 and the fifth through hole. It has a sixth through hole 425, which communicates with the through hole 424.

That is, the single flow path forming member (hereinafter referred to as the downstream reference member) 4 at the boundary E2 of each of the first region S1 and the second region S2 serves as the through hole 42, and the fourth through hole 423 and the fifth through hole 423 and the fifth. It has a through hole 424 and a sixth through hole 425. The downstream reference member 4 in one of the first region S1 and the second region S2 (the first region S1 in the example of the present embodiment) has the fourth through hole 423 as the through hole 42. In addition to the fifth through hole 424 and the sixth through hole 425, the first through hole 420 is also provided.

Then, in each of the third region S3 and the fourth region S4, at least one flow path forming member 4 on both sides in the X-axis direction with respect to the downstream reference member 4 is the fifth of the downstream reference member 4. It has a seventh through hole 426 that penetrates in the X-axis direction at a position corresponding to the through hole 424.

In the present embodiment, a plurality of flow path forming members 4, including the flow path forming member 4 adjacent to the downstream reference member 4, specifically, the downstream reference member 4 sandwiching the downstream reference member 4 from the downstream reference member 4 (boundary E2). Each of the plurality of flow path forming members 4 arranged up to the intermediate portion in the X-axis direction of the three regions S3 and the fourth region S4 has a seventh through hole 426.

The flow path forming member 4 located at the intermediate portion of the third region S3 and the fourth region S4 in the X-axis direction is the eighth through hole 427 penetrating in the X-axis direction as the through hole 42, and is the seventh. It has an eighth through hole 427 that communicates with the through hole 426 and is open on the outer periphery of the flow path forming member 4. In the present embodiment, the eighth through hole 427 is opened at the

straight portions

400b and 410b forming the

outer circumferences

400 and 410 of the main body portion 40 and the fitting portion 41.

Returning to FIG. 2, each of the pair of

end plates

5 and 6 has a plate-shaped

end plate bodies

50 and 60 that overlap with the

plate bodies

20 and 30 of the

heat transfer plates

2 and 3, and the outer circumferences of the

end plate bodies

50 and 60. It has annular

fitting portions

51 and 61 extending from the entire circumference. The annular

fitting portions

51 and 61 can be fitted with the annular

fitting portions

21 and 31 of the

heat transfer plates

2 and 3.

The end plate main body 50 of one end plate 5 of the pair of

end plates

5 and 6 has the

second holes

203, 303, the

third holes

204, 304, and the

fourth holes

205, 305 of the heat transfer plates 2 and 3). It has a through hole (not shown) corresponding to.

Further, the end plate main body 50 has a through hole (not shown) corresponding to an inner hole of the first through hole 420 of the flow path forming member 4 arranged so as to correspond to the

first holes

202 and 302. Along with this, one end plate 5 has four

nozzles

52, 53, 54, 55 provided corresponding to each through hole of the end plate main body 50. These four

nozzles

52, 53, 54, 55 have an inner hole and are connected to the end plate main body 50 in a state where the inner hole is communicated with the corresponding through hole.

In the plate heat exchanger 1 according to the present embodiment, as shown in FIG. 10, a plurality of

heat transfer plates

2 and 3 are superposed in the X-axis direction. At the same time, while the arrangement of the plurality of flow path forming members 4 is maintained, the main body 40 of each flow path forming member 4 is between the first surfaces Sa and Sa of the adjacent

heat transfer plates

2 and 3. The fitting portions 41 of the flow path forming members 4 are fitted into the

first holes

202 and 302, respectively.

In this state, each of the plurality of flow path forming members 4 brings its own fitting portion 41 into close contact with the adjacent flow path forming members 4. In each of the plurality of flow path forming members 4 of the present embodiment, the

straight portions

400b and 410b included in the

outer circumferences

400 and 410 of the main body portion 40 and the fitting portion 41 are inside the heat transfer plates 2 and 3 (Y-axis). It is arranged so as to face the middle side in the direction). Then, the pair of

end plates

5 and 6 are arranged so as to sandwich the plurality of

heat transfer plates

2 and 3, and the close portions of the

members

2, 3 and 4 are liquid-tightly joined.

In the present embodiment, the intersections of the

protrusions

201 and 301 of the adjacent

heat transfer plates

2 and 3 intersect with each other, the annular

fitting portions

21 and 31 fitted to each other, and the perimeters of the

first holes

202 and 302. The perimeters of the

second holes

203 and 303, the perimeters of the

third holes

204 and 304, the perimeters of the

fourth holes

205 and 305, and the like are brazed. Further, the adjacent flow path forming members 4 are brazed to each other, and the outer peripheral edge portion of the main body portion 40 of the flow path forming member 4 and the periphery of the

first holes

202 and 302 are brazed.

As a result, in the plate heat exchanger 1 according to the present embodiment, as shown in FIGS. 10 and 11, the first flow path Ra that allows the first fluid A to flow in the Y-axis direction and the second fluid B to flow in the Y-axis direction. The second flow path Rb to be circulated in the water is alternately formed in the X-axis direction with the

heat transfer plates

2 and 3 as boundaries.

Further, by connecting the

second holes

203 and 303 of the plurality of

heat transfer plates

2 and 3 in the X-axis direction, the first fluid communicates only with the first flow path Ra and causes the first fluid A to flow out from the first flow path Ra. The discharge path Ra2 is formed (see FIG. 10). Further, by connecting the

third holes

204 and 304 of the plurality of

heat transfer plates

2 and 3 in the X-axis direction, the second fluid B communicates only with the second flow path Rb and the second fluid B flows into the second flow path Rb. Two fluid supply paths Rb1 are formed. Further, by connecting the

fourth holes

205 and 305 of the plurality of

heat transfer plates

2 and 3 in the X-axis direction, the second fluid B communicates only with the second flow path Rb and the second fluid B flows out from the second flow path Rb. Two fluid discharge paths Rb2 are formed (see FIG. 11).

In the plate heat exchanger 1 of the present embodiment, as shown in FIGS. 10 and 12, through holes (first through hole 420, second through hole 421, third through hole 422, etc.) of the plurality of flow path forming members 4 The first fluid supply path Ra1 communicating only with the first flow path Ra by communicating the fourth through hole 423, the fifth through hole 424, the sixth through hole 425, the seventh through hole 426, and the eighth through hole 427). Is formed. The first fluid supply path Ra1 causes the first fluid A to flow into each first flow path Ra.

In the present embodiment, through holes (first through hole 420, second through hole 421, third through hole 422, fourth through hole 423, fifth through hole 424, sixth through hole 425) of each flow path forming member 4 , The arrangement and the number of the seventh through hole 426 and the eighth through hole 427) differ depending on the arrangement of the plurality of flow path forming members 4. The first fluid supply path Ra1 becomes a path for distributing the first fluid A in the X-axis direction toward the downstream side.

Specifically, the first fluid supply path Ra1 includes an upstream system US that is directly or indirectly connected to the supply source of the first fluid A, and a downstream system DS that is fluidly connected to the upstream system US. including.

The upstream system US includes an introduction portion US1, a branch portion (first branch portion) US2 communicating with the introduction portion US1, and a pair of branch flow paths US3 communicating with the branch portion US2. The introduction portion US1 directly or indirectly communicates with a pipe (not shown) extending in the X-axis direction and connecting to the supply source of the first fluid A. The branch portion US2 is arranged in the middle portion in the X-axis direction of the plurality of

heat transfer plates

2 and 3, and branches the first fluid A introduced into the introduction portion US1 into one side and the other side in the X-axis direction. To do. The branch portion US2 of the present embodiment is arranged at a position corresponding to between the

heat transfer plates

2 and 3 in the middle portion in the X-axis direction of the plurality of

heat transfer plates

2 and 3, and is in a direction orthogonal to the X-axis direction. It penetrates in the X-axis direction at a position different from the introduction portion US1 in. The pair of branch flow paths US3 has a base end communicating with the branch portion US2 and a tip opposite to the base end. The pair of branch flow paths US3 extend in the X-axis direction in each of a region (first region) S1 on one side and a region (second region) S2 on the other side of the branch portion US2 in the X-axis direction.

In the upstream system US of the present embodiment, the introduction portion US1 is formed by connecting the first through holes 420 of the plurality of flow path forming members 4. Further, the branch flow path US3 is formed by connecting the fourth through holes 423 of the plurality of flow path forming members 4. Along with this, the second through hole 421 of the flow path forming member (upstream side reference member) 4 in the intermediate portion in the X-axis direction constitutes the branch portion US2. Further, the third through hole 422 of the upstream reference member 4 constitutes a communication portion US4 that communicates the introduction portion US1 and the branch portion US2.

The downstream system DS includes a plurality of open portions DS1 that directly or indirectly communicate with one side or the other side of the branch portion US2 in the X-axis direction. These plurality of open portions DS1 directly or indirectly communicate with the tip of the branch flow path US3 of the upstream system US and open toward the corresponding first flow path Ra at a plurality of points in the X-axis direction. The downstream system DS of the present embodiment includes the most downstream branch (second branch) DS2 that directly or indirectly communicates with the tip of the branch flow path US3 of the upstream system US. Further, this downstream system DS extends in the X-axis direction in each of one side region (third region) S3 and the other side region (fourth region) S4 with the most downstream branch portion DS2 in the X-axis direction as a boundary. It also includes a pair of most downstream branch flow paths DS3. The most downstream branch portion DS2 penetrates the flow path forming member 4 in the X-axis direction at a position different from the introduction portion US1 and the branch flow path US3 in the Y-axis direction. Each of the pair of most downstream branch flow paths DS3 has a base end communicating with the most downstream branch portion DS2 and a tip opposite to the base end and communicating with the open portion DS1.

In the downstream system DS of the present embodiment, the fifth through hole 424 of the downstream reference member 4 constitutes the most downstream branch portion DS2. Along with this, the sixth through hole 425 of the downstream reference member 4 constitutes a communication portion DS4 that communicates the branch flow path US3 and the most downstream branch portion DS2.

Then, the seventh through hole of the flow path forming member 4 in each of the one side region (third region) S3 and the other side region (fourth region) S4 with the most downstream branch portion DS2 in the X-axis direction as a boundary. The most downstream branch flow path DS3 is formed by connecting the 426s and communicating with the most downstream branch DS2. Further, the eighth through hole 427 of the flow path forming member 4 in the intermediate portion in the X-axis direction of each of the third region S3 and the fourth region S4 constitutes an open portion DS1 opened toward the first flow path Ra. ..

The plate heat exchanger 1 according to the present embodiment is as described above. In this plate heat exchanger 1, when the first fluid A is supplied to the first fluid supply path Ra1 from a pipe (not shown) connected to the nozzle 52, the first fluid A axes the introduction portion US1 on the X axis. Distribute in the direction. Then, when the first fluid A reaches the intermediate portion (substantially intermediate) of the member arrangement region S in the X-axis direction, it reaches the branch portion US2 through the communication portion US4. A pair of branch flow paths US3 extending on both sides of the branch portion US2 communicate with the branch portion US2 in the X-axis direction. Therefore, the first fluid A flows from the branch portion US2 through the pair of branch flow paths US3. That is, the first fluid A is distributed to both sides in the X-axis direction starting from the branch portion US2. Then, when the first fluid A flows through the branch flow path US3 and reaches the intermediate portion of each of the first region S1 and the second region S2, the flow path forming member (downstream side reference member) 4 in the intermediate portion thereof. It reaches the most downstream branching part DS2 through the communication part DS4 of.

A pair of most downstream branch flow paths DS3 extending on both sides of the most downstream branch DS2 communicate with the most downstream branch DS2 in the X-axis direction. Therefore, the first fluid A flows from the most downstream branch portion DS2 through the pair of most downstream branch flow paths DS3. That is, the first fluid A is distributed to both sides in the X-axis direction starting from the most downstream branch portion DS2.

Then, when the first fluid A flows through the most downstream branch flow path DS3 and reaches the intermediate portion in the X-axis direction of the region on one side and the region on the other side with the downstream reference member 4 as a boundary, the intermediate portion thereof. It flows out from the open portion DS1 of the flow path forming member 4 in the above toward the first flow path Ra.

In the flow path forming member 4 of the present embodiment, the

outer circumferences

400 and 410 of the main body portion 40 and the fitting portion 41 have

linear portions

400b and 410b, respectively. Further, the shortest linear distances L1 and L2 from the centers CP1 and CP2 of the

arc portions

400a and 410a included in the

outer circumferences

400 and 410 to the

straight portions

400b and 410b are shorter than the radii of the

first holes

202 and 302. Therefore, the first fluid A flowing out from each of the open portions DS1 at a plurality of locations is a space between the

first holes

202 and 302 connected in the X-axis direction and the

straight portions

400b and 410b of the flow path forming member 4. Inflows into at least one (plurality in this embodiment) first flow path Ra in the immediate vicinity while spreading in the X-axis direction. That is, the supplied first fluid A is evenly or substantially evenly distributed to a plurality of locations in the X-axis direction through a path of the same distance or substantially the same distance, and each of the plurality of first flow paths Ra (distributed locations). It flows into the first flow path Ra) near.

Then, the first fluid A flows through the first flow path Ra in the Y-axis direction, and then flows out to the outside through the first fluid discharge path Ra 2 and the nozzle 53 connected to the first fluid discharge path Ra 2.

On the other hand, as shown in FIG. 11, when the second fluid B is supplied to the second fluid supply path Rb1 from a pipe (not shown) connected to the nozzle 54, the second fluid B becomes the second fluid supply path. It flows into a plurality of second flow paths Rb through Rb1. Then, the second fluid B flows through the second flow path Rb in the Y-axis direction, and then flows out to the outside through the second fluid discharge path Rb2 and the nozzle 55 connected to the second fluid discharge path Rb2.

In this way, the first fluid A and the second fluid B flow through the first flow path Ra as the first fluid A flows through the first flow path Ra, and the second fluid B flows through the second flow path Rb. Heat exchange is performed via the

heat transfer plates

2 and 3 that partition Ra and the second flow path Rb.

As described above, the plate heat exchanger 1 is a plurality of

heat transfer plates

2 and 3 having first holes (through holes) 202 and 302 penetrating in the X-axis direction (predetermined direction) at positions corresponding to each other. The first flow path Ra that allows the first fluid A to flow and the second flow path Rb that allows the second fluid B to flow by being overlapped in the X-axis direction are separated by each of the plurality of

heat transfer plates

2 and 3. Flows extending in the X-axis direction at positions corresponding to the plurality of

heat transfer plates

2 and 3 alternately formed in the X-axis direction and the first holes (each through holes) 202 and 302 of the plurality of

heat transfer plates

2 and 3. The road forming member group 4A is provided. The flow path forming member group 4A is composed of a plurality of flow path forming members 4 connected in the X-axis direction. At least two of the plurality of flow path forming members 4 are through holes 42 (first through hole 420, second through hole 421, first through hole 42, first through hole 42, second through hole 421, which penetrate the flow path forming member 4 in the X-axis direction. It has three through holes 422, a fourth through hole 423, a fifth through hole 424, a sixth through hole 425, a seventh through hole 426, and an eighth through hole 427), and the at least two flow path forming members 4 are The first fluid supply path Ra1 that supplies the first fluid A to the first flow path Ra by communicating with each other is formed. The first fluid supply path Ra1 is arranged and introduced in the intermediate portion between the introduction portion US1 extending in the X-axis direction and the first fluid A being introduced from the outside and a plurality of

heat transfer plates

2 and 3 arranged in the X-axis direction. A branch portion (first branch portion) US2 that branches the first fluid A introduced into the portion US1 into one side and the other side in the X-axis direction, and one side or the other side of the branch portion US2 in the X-axis direction directly. It is an open portion DS1 that communicates targetly or indirectly, and includes a plurality of open portions DS1 that are open toward the corresponding first flow path Ra at a plurality of locations in the X-axis direction.

According to the above configuration, the plurality of flow path forming members 4, that is, the first fluid supply path Ra1 composed of the flow path forming member group 4A is formed by the plurality of

heat transfer plates

2 and 3 stacked in the X-axis direction. One region (first region) S1 and the other region (second region) S2 in the X-axis direction based on the positions corresponding to the

heat transfer plates

2 and 3 in the middle portion in the X-axis direction. The first fluid A is branched (distributed) to each.

As a result, the first fluid A flowing through the first fluid supply path Ra 1 reaches the first flow path Ra in a state of being distributed to at least two places in the X-axis direction. That is, in a state where the flow distance of the first fluid A from the branch portion US2 to the first flow path Ra is the same or substantially the same, the first fluid A is located at different positions in the X-axis direction. Outflow from.

Therefore, the first fluid A is distributed to a plurality of locations in the X-axis direction, and flows into each of the plurality of first flow paths Ra in a substantially equal state (flow rate). Therefore, the plate heat exchanger 1 according to the present embodiment supplies the first fluid A, which is the target of evaporation or condensation, to the plurality of first flow paths Ra in a state where distribution unevenness is suppressed (substantially evenly). it can. As a result, the heat exchange performance can be improved.

In the present embodiment, each of the plurality of flow path forming members 4 is sandwiched around the through holes (first holes) 202 and 302 of the two

heat transfer plates

2 and 3 of the plurality of

heat transfer plates

2 and 3. It has been. Specifically, each of the plurality of flow path forming members 4 is arranged corresponding to the first flow path Ra arranged in the X-axis direction with the second flow path Rb interposed therebetween, and through holes (through holes) of adjacent heat transfer plates 2 and 3 ( First hole) It is sandwiched around 202 and 302. In this way, each of the plurality of flow path forming members 4 is constrained by the

heat transfer plates

2 and 3. Therefore, the positional deviation of the plurality of flow path forming members 4 is prevented, and as a result, the communicability of the first fluid supply path Ra1 formed by the through holes of the plurality of flow path forming members 4 is surely secured.

In the present embodiment, the first fluid supply path Ra1 is between a branch portion (first branch portion) US2 and a plurality of open portions DS1 communicating with one side of the branch portion US2 in the X-axis direction, and a branch portion. At least one most downstream branch that branches the first fluid A into one side and the other side in the X-axis direction between the US2 and the plurality of open portions DS1 communicating with the other side of the branch portion US2 in the X-axis direction. Each has a part (second branch part) DS2.

According to the above configuration, the first fluid supply path Ra1 has two regions (the most downstream branch portion DS2 as a boundary) in which each of the first region S1 and the second region S2 in the member arrangement region S is further subdivided in the X-axis direction. The first fluid A is sequentially branched into each of the one-sided region (third region) S3 and the other-side region (fourth region) S4).

As a result, the first fluid A flowing through the first fluid supply path Ra1 is sequentially branched in the X-axis direction not only in the upstream system US but also in the downstream system DS and reaches the first flow path Ra. That is, the first fluid A flows into the first flow path Ra at different positions in the X-axis direction, but the distance from the branch portion US2 to reach the first flow path Ra is the same or substantially the same.

It should be noted that the present invention is not limited to the above embodiment, and it goes without saying that modifications can be made as appropriate without departing from the gist of the present invention.

In the above embodiment, the first fluid supply path Ra1 for supplying the first fluid A to the first flow path Ra is composed of a plurality of flow path forming members 4, but the configuration is not limited to this. For example, when the second fluid B is supplied to the second flow path Rb in a state where distribution unevenness is suppressed (approximately evenly), the second fluid supply path Rb1 also forms a plurality of flow paths. It may be composed of members. The plurality of flow path forming members in this case are configured in the same manner as the flow path forming member 4 forming the first fluid supply path Ra1.

In the above embodiment, the downstream system DS of the first fluid supply path Ra1 includes the most downstream branch DS2 and the pair of most downstream branch flow paths DS3, but the configuration is not limited to this. For example, the open portion DS1 of the downstream system DS is connected to each tip of the branch flow path US3 of the upstream system US, and the first fluid supply path Ra1 branches in the X-axis direction at one place (branch portion US2). One fluid A may flow out from the two open portions DS1 toward the first flow path Ra.

Further, the downstream system DS of the first fluid supply path Ra1 is an intermediate branch system that fluidly connects the branch flow path US3 of the upstream system US and the most downstream branch portion DS2, and the first fluid A is the X-axis. At least one branch system (second branch) that distributes in the direction may be further provided.

In this case, the intermediate branch system is an X that communicates with the intermediate branch portion connected to the upstream flow path (for example, the branch flow path US3 of the upstream system US) and the intermediate branch portion as a boundary. A pair of intermediate branch flow paths extending in the X-axis direction may be provided in each of the region on one side in the axial direction and the region on the other side. Each of the pair of intermediate branch flow paths has a tip (termination) at the intermediate portion in the X-axis direction of the one-sided region and the other-side region extending by itself, and has a downstream portion (end) in the downstream system DS. For example, the tip is connected to the open portion DS1). In each of the plurality of flow path forming members 4, a number of through holes corresponding to the number of branch systems are arranged at different positions.

In the above embodiment, the

outer circumferences

400 and 410 of the main body 40 and the fitting portion 41 of the flow path forming member 4 include the

arc portions

400a and 410a and the

straight portions

400b and 410b, and the

arc portions

400a and 410a of the

outer circumferences

400 and 410. Since the shortest linear distances L1 and L2 from the center CP1 and CP2 to the

straight portions

400b and 410b are smaller than the radius of the

first holes

202 and 302, the first fluid A flowing out from the opening portion DS1 flows in the X-axis direction. While expanding, it flows into a plurality of first flow paths Ra in the immediate vicinity of the open portion DS1 (the first fluid A distributed in the first fluid supply path Ra1 flows into all of the plurality of first flow paths Ra). It is not limited to this configuration.

For example, as shown in FIGS. 13 and 14, the plurality of flow path forming members 4 may be configured such that the outer peripheral edges of the main body 40 are sandwiched between adjacent

heat transfer plates

2 and 3. That is, in each of the plurality of flow path forming members 4, the first hole 202, where the linear distance (radius in the case of a circle) r1 from the center CP1 of the main body 40 to the outer circumference 400 is anywhere on the entire circumference. It may be longer than the radius of 302. In this case, it is preferable that the contours of the plurality of flow path forming members 4 have a shape similar to the hole shapes of the

first holes

202 and 302.

In this case, as shown in FIG. 15, some of the flow path forming members 4 among the plurality of flow path forming members 4 connected in the X-axis direction have through holes (first through holes 420, first through holes 420, as in the above embodiment. It has at least one of a second through hole 421, a third through hole 422, a fourth through hole 423, a fifth through hole 424, a sixth through hole 425, a seventh through hole 426, and an eighth through hole 427). As a result, only the open portion DS1 of the specific flow path forming member 4 arranged at intervals in the X-axis direction communicates with the corresponding single first flow path Ra.

In this case, the other first flow path Ra (a plurality of first flow path Ra corresponding to the flow path forming member 4 having no open portion DS1) is a through hole (numbering) provided in the

heat transfer plates

2 and 3. (Not), and they communicate with each other through through holes penetrating in the X-axis direction at positions separated from the

first holes

202 and 302 in the Y-axis direction. Then, the flow path formed by the plurality of first flow paths Ra communicating with the through holes may be turned at least twice, and the first flow path Ra located at the most downstream may be connected to the first fluid discharge path Ra2.

Even in this way, in the first fluid supply path Ra1, the first fluid A is branched (distributed) at least once in the X-axis direction, and then flows out from the plurality of open portions DS1 toward the first flow path Ra. Therefore, the circulation distance of the first fluid A is uniform or substantially uniform. Therefore, even in this configuration, the same actions and effects as those in the above embodiment are obtained.

In the above embodiment, the flow path forming member (upstream reference member) 4 in the intermediate portion of the member arrangement region S in the X-axis direction has a single second through hole 421 and is provided on both sides of the upstream reference member 4. A flow path forming member 4 has a fourth through hole 423 at a position corresponding to a single second through hole 421, but is not limited to this configuration.

For example, as shown in FIG. 16, the flow path forming member (upstream reference member) 4 located in the middle portion of the member arrangement region S in the X-axis direction has two second through holes 421 at different positions. Then, the flow path forming member 4 in the region (first region) S1 on one side in the X-axis direction of the upstream reference member 4 corresponds to the second through hole 421 of one of the two second through holes 421. The flow path forming member 4 in the region (second region) S2 on the other side in the X-axis direction of the upstream reference member 4 has the fourth through hole 423 at the position, and is the other of the two second through holes 421. A fourth through hole 423 may be provided at a position corresponding to the second through hole 421 of the above.

That is, the upstream system US is not limited to a mode in which a pair of branch flow paths US3 are connected to a branch portion US2 composed of a single second through hole 421. For example, the branch portion US2 may be composed of two second through holes 421, and each of the pair of branch flow paths US3 may be connected to different positions of the branch portion US2.

Further, the upstream reference member 4 has an even number of second through holes 421 (branch portion US2). Then, the flow path forming member 4 in the region (first region) S1 on one side in the X-axis direction of the upstream reference member 4 is half of the even number of second through holes 421 of the upstream reference member 4. A flow path forming member 4 having a fourth through hole 423 at a position corresponding to each of the second through holes 421 and in a region (second region) S2 on the other side in the X-axis direction of the upstream reference member 4. Is the second through hole 421, which is half the number of the even number of second through holes 421 of the upstream reference member 4, and is the flow path forming member 4 of the one side region (first region S1). The fourth through hole 423 may be provided at a position corresponding to the second through hole 421 at a position not corresponding to the fourth through hole 423. That is, in the upstream system US, a plurality of pairs of branch flow paths US3 may be provided.

In this case, the length (tip position) of each pair of branch flow paths US3 in the X-axis direction may be different or the same. In this respect, the same applies to the most downstream branch portion DS2 and the most downstream branch flow path DS3 of the downstream system DS.

In the flow path forming member 4 of the above embodiment, the fitting portion 41 is connected only to the first surface of the main body portion 40, but the configuration is not limited to this. For example, the fitting portion 41 may be connected to each of the first surface and the second surface of the main body portion 40. In this case, the thickness of the fitting portion 41 in the X-axis direction may correspond to the thickness of one

heat transfer plate

2 or 3.

In the above embodiment, the outer peripheral edge portion of the flow path forming member 4 (main body portion 40) is sandwiched around the through holes (first holes 202, 302) of the adjacent

heat transfer plates

2 and 3, but this configuration is used. Not limited. For example, the outer diameters of the plurality of flow path forming members 4 ... Are smaller than the hole diameters of the through holes (first holes) 202 and 302 of the

heat transfer plates

2 and 3, and the plurality of flow paths connected in the X-axis direction. The forming member 4, that is, the flow path forming member group 4A may be inserted into the through holes (first holes) 202 and 302 of the plurality of

heat transfer plates

2 and 3 connected in the X-axis direction.

In this case, it is preferable that the flow path forming members 4 adjacent to each other in the X-axis direction are mechanically connected to each other. For example, adjacent flow path forming members 4 may be connected to each other by uneven fitting.

Further, the flow path forming members 4 at both ends of the plurality of flow path forming members 4 (integrated plurality of flow path forming members 4: flow path forming member group 4A) connected in the X-axis direction are at the most ends. It may be supported by certain

heat transfer plates

2, 3 or

end plates

5, 6. However, the flow path forming member 4 at the end is liquid-tightly connected to the heat transfer plate 2 or the end plate 5 at the end so that the first fluid A is supplied only to the introduction portion US1. Needless to say, the through hole is set to a size corresponding to the introduction portion US1.

In the above embodiment, each of the plurality of flow path forming members 4 is arranged so as to correspond to the first flow path Ra arranged in the X-axis direction with the second flow path Rb interposed therebetween, but is not limited thereto. That is, the single flow path forming member 4 and the single first flow path Ra have a one-to-one relationship, but the present invention is not limited to this. For example, each of the plurality of flow path forming members 4 or at least one of the plurality of flow path forming members 4 may be arranged (formed) so as to correspond to two or more first flow path Ras. That is, the flow path forming member 4 may be arranged so as to straddle at least two first flow paths Ra. However, the through holes of the plurality of flow path forming members 4 are arranged so as to form the first fluid supply path Ra1 that distributes the first fluid A in the X-axis direction, as in the above embodiment.

1 ... Plate heat exchanger, 2, 3 ... Heat transfer plate, 4 ... Flow path forming member, 4A ... Flow path forming member group, 5, 6 ... End plate, 20, 30 ... Plate body, 21, 31 ... Ancillary fitting part, 40 ... Main body part, 41 ... Fitting part, 42 ... Through hole, 50, 60 ... End plate main body, 51, 61 ... Circular fitting part, 52, 53, 54, 55 ... Nozzle, 200, 300 ... Concave, 201, 301 ... Convex, 202, 302 ... First hole (through hole), 203, 303 ... Second hole (through hole), 204, 304 ... Third hole (through hole), 205, 305 ... Fourth hole (through hole), 400, 410 ... Outer circumference, 400a, 410a ... Arc portion, 400b, 410b ... Straight part, 420 ... First through hole (through hole), 421 ... Second through hole (through hole) ), 422 ... Third through hole (through hole), 423 ... Fourth through hole (through hole), 424 ... Fifth through hole (through hole), 425 ... Sixth through hole (through hole), 426 ... Seventh Through hole (through hole), 427 ... 8th through hole (through hole), A ... first fluid, B ... second fluid, CP1, CP2 ... center, DS ... downstream system, DS1 ... open part, DS2 ... most downstream Branch part, DS3 ... most downstream branch flow path, DS4 ... communication part, E1 ... boundary, E2 ... boundary, L1, L2 ... linear distance, r1 ... radius, r2 ... radius, Ra ... first flow path, Ra1 ... first fluid Supply path, Ra2 ... first fluid discharge path, Rb ... second flow path, Rb1 ... second fluid supply path, Rb2 ... second fluid discharge path, S ... member arrangement area, S1 ... first area, S2 ... second Region, S3 ... Third region, S4 ... Fourth region, Sa ... First surface, Sb ... Second surface, US ... Upstream system, US1 ... Introduction section, US2 ... Branch section, US3 ... Branch flow path, US4 ... Communication Department

Claims

A plurality of heat transfer plates having through holes penetrating in a predetermined direction at positions corresponding to each other, and by being overlapped in the predetermined direction, a first flow path through which the first fluid flows and a second flow path through which the second fluid flows. A plurality of heat transfer plates that alternately form a flow path in the predetermined direction with each of the plurality of heat transfer plates as a boundary.
A group of flow path forming members extending in a predetermined direction at positions corresponding to the through holes of the plurality of heat transfer plates are provided.
The flow path forming member group is composed of a plurality of flow path forming members connected in a predetermined direction.
At least two of the plurality of flow path forming members have through holes penetrating the flow path forming member in the predetermined direction.
The through holes of the at least two flow path forming members form a first fluid supply path for supplying the first fluid to the first flow path by communicating with each other.
The first fluid supply path is
An introduction part that extends in the predetermined direction and the first fluid is introduced from the outside,
A first branch portion arranged in an intermediate portion of the plurality of heat transfer plates arranged in a predetermined direction and branching the first fluid introduced into the introduction portion into one side and the other side in the predetermined direction.
An open portion that directly or indirectly communicates with the one side or the other side of the first branch portion, and a plurality of open portions that open toward the corresponding first flow path at a plurality of locations in the predetermined direction. A plate heat exchanger characterized by, including.
The plate-type heat exchanger according to claim 1, wherein each of the plurality of flow path forming members is sandwiched around the through holes of two heat transfer plates among the plurality of heat transfer plates.
The first fluid supply path is between the first branch portion and the plurality of open portions communicating with the one side of the first branch portion, and the first branch portion and the first branch portion. The second aspect of claim 2, wherein each of the plurality of open portions communicating with the other side has at least one second branch portion for branching the first fluid into one side and the other side in the predetermined direction. Plate heat exchanger.