JP2001215093A - Lamination-type heat exchanger and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve the high performance and miniaturization of a lamination- type heat exchanger. SOLUTION: In this lamination-type heat exchanger, a plurality of channel plates 31 where a plurality of channels 34 and 35 passing through a plate surface are formed are laminated for arranging between a pair of end plates 32 and 33, the channels 34 and 35 are provided at positions where they are adjacent each other and in parallel, and heat exchange fluids A and B flowing in the channels 34 and 35, respectively, oppositely flow, thus performing the heat exchange of the heat exchange fluids A and B in the form of opposite flow, and hence achieving the high performance and miniaturization of the lamination- type heat exchanger.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stacked heat exchanger used for heat exchange between a liquid as a fluid and a gas-liquid two-phase flow accompanied by a phase change.

[0002]

2. Description of the Related Art In recent years, a laminated heat exchanger as disclosed in Japanese Patent Application Laid-Open No. 63-137793 has been proposed for the purpose of reducing the size and weight of a heat exchanger. The stacked heat exchanger is formed by stacking a plate formed by punching a metal flat plate and forming a flow path, and the flow path through which the fluid flows is formed within the thickness of the flat plate. Stacked heat exchangers have a large surface area per volume, are compact, and require less material, and thus have the advantage of replacing conventional shell-and-tube or plate heat exchangers.

FIG. 10 is a partially cut-away view for explaining the internal structure of the laminated heat exchanger. The stacked heat exchanger includes a plurality of flow path plates 81 in which flow paths 86 penetrating the plate surface are formed, and a plurality of flow path plates 82 in which flow paths 87 are similarly formed. Stacked, a pair of end plates 84 and 85
It is the structure arranged between.

The flow path plate 81 has through holes 92a and 92b other than the flow path 86, the flow path plate 82 has through holes 95a and 95b other than the flow path 87, and the partition plate 83 has through holes 93a and 93b. 94a and 94b are provided respectively. In the end plate 84, an inlet pipe 88 and an outlet pipe 89 for the heat exchange fluid A and an inlet pipe 90 and an outlet pipe 91 for the heat exchange fluid B are erected. Here, the flow path 86 and the flow path 87 are in a positional relationship where the flow in the flow path is orthogonal via the partition plate 83 as shown in FIG.

[0005] The heat exchange fluid A flows into the heat exchanger through an inlet pipe 88 provided in the end plate 84, and passes through through holes 94a and 95a into a flow path 86 formed in the flow path plate 81. enter. The heat exchange fluid A flowing through the flow path 86 passes through the through holes 95b and 94b and passes through the outlet pipe 8
From 9 flows out of the heat exchanger. On the other hand, heat exchange fluid B
Flows into the heat exchanger through an inlet pipe 90 provided in the end plate 84, and enters a flow path 87 formed in the flow path plate 82 via the through holes 92a and 93a.
The heat exchange fluid B flowing through the flow path 87 flows out of the heat exchanger from the outlet pipe 91 via the through holes 93b and 92b. At this time, the heat exchange fluid A flowing through the flow path 86 exchanges heat with the heat exchange fluid B flowing through the flow path 87 via two partition plates 83 located above and below the heat exchange fluid A.

[0006]

However, such a conventional laminated heat exchanger has the following problems.

First, the form of heat transfer between the heat exchange fluids A and B is as follows:
Generally, the cross-flow is inferior to the counterflow in heat transfer performance. Therefore, in order to obtain predetermined heat transfer characteristics, a larger heat transfer area is required than in a counter-flow type heat exchanger, which results in an increase in the size of the heat exchanger. Further, for example, in order to improve the heat transfer characteristics on the heat exchange fluid A side of the heat exchanger and to increase the heat transfer area by increasing the flow path 86, the flow path 87 opposed via the partition plate 83 is It becomes necessary to increase the number of channels or to increase the width of the channels. In any case, since the cross-sectional area of the flow path 87 increases and the flow velocity of the heat exchange fluid B decreases,
There was a problem that the heat transfer characteristics of the heat exchange fluid B deteriorated.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a plurality of flow paths A and B penetrating a plate surface.
Having a configuration in which a plurality of flow path plates in which are formed are stacked and arranged between a pair of end plates, and wherein the flow path A and the flow path B are provided adjacent to and in parallel with each other. It is.

According to the present invention, the heat exchange fluids A and B can exchange heat in a counterflow form. Generally, the counterflow is a heat transfer mode having higher heat exchange characteristics as compared with the cross-flow or the parallel flow which is the heat transfer mode of the conventional laminated heat exchanger. Therefore, it is possible to provide a specific configuration in which the heat exchange fluids A and B exchange heat in the form of counterflow, so that it is possible to realize a high-performance and miniaturized stacked heat exchanger.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The laminated heat exchanger of the present invention achieves a predetermined effect by adopting the specific embodiments described in the claims.

That is, the laminated heat exchanger of claim 1 is
A plurality of flow path plates in which a plurality of flow paths A and flow paths B penetrating a plate surface are stacked, and a configuration in which a plurality of flow path plates are disposed between a pair of end plates is provided. It is configured to be provided adjacent to and parallel to each other. According to this, since heat exchange fluids A and B can perform heat exchange in the form of counterflow, high performance and miniaturization of the stacked heat exchanger can be realized.

Further, in the laminated heat exchanger of the present invention, a plurality of flow path plates having a plurality of flow paths A and flow paths B penetrating the plate surface are laminated, and a plurality of the flow path plates are formed. The configuration has a configuration in which a partition plate is inserted every other time and is disposed between a pair of end plates, and the flow path A and the flow path B are provided at positions adjacent to and parallel to each other. According to this, even when the number of stacked flow path plates is large and the flow path height is high, by inserting the partition plate between the plurality of flow path plates, the mechanical strength as a pressure vessel is improved. , In addition to the effect of claim 1,
The reliability of the stacked heat exchanger can be improved.

[0013] In the laminated heat exchanger according to a third aspect of the present invention, a plurality of flow path plates having a plurality of flow paths A and B passing therethrough are alternately laminated via a partition plate.
It has a configuration arranged between a pair of end plates, and has a configuration in which the flow path A and the flow path B are provided at positions adjacent to and parallel to each other. According to this, even when the number of stacked flow path plates is large and the flow path height is high, the mechanical strength of the pressure vessel is improved by alternately stacking the flow path plates via the partition plates. Since the flow paths are divided so that the flow of the heat exchange fluid can be made uniform, it is possible to further improve the performance and reliability of the stacked heat exchanger in addition to the effects of the first aspect.

According to a fourth aspect of the present invention, there is provided a laminated heat exchanger according to any one of the first to third aspects.
And the flow path B have a substantially U-shaped folded portion. According to this, since the length of the heat exchanger in the vertical direction or the horizontal direction can be sufficiently reduced with respect to the length of the flow path, the size of the stacked heat exchanger can be further reduced.

According to a fifth aspect of the present invention, in addition to the fourth aspect, the width of at least one of the flow path A and the flow path B is substantially equal to the width in the longitudinal direction of the flow path. Are the same. According to this, it becomes possible for each fluid to flow smoothly in the flow path, and deterioration of heat transfer performance due to stagnation of the fluid is eliminated, thereby realizing higher performance of the stacked heat exchanger. it can.

According to a sixth aspect of the present invention, there is provided the laminated heat exchanger according to the fourth or fifth aspect, wherein the distances between the flow paths of the same fluid at positions adjacent to each other on the flow path plate are adjacent to each other. It is larger than the distance between the flow paths of the different fluids at the position. According to this, the thermal resistance between the flow paths of adjacent same fluids becomes larger than the thermal resistance between the flow paths of adjacent different fluids, and the transfer of heat between the same fluids is reduced. Further higher performance of the exchanger can be realized.

According to a seventh aspect of the present invention, there is provided the laminated heat exchanger according to any one of the fourth to sixth aspects, further comprising a flow path between the same fluid at adjacent positions on the flow path plate. A through-hole is provided, and a through-hole communicating with the through-hole is provided on another plate at a position facing the through-hole. According to this, since the transfer of heat between the same fluids in the flow passages adjacent to each other is completely shut off, a remarkable improvement in performance of the stacked heat exchanger can be realized.

According to an eighth aspect of the present invention, in addition to any one of the first to seventh aspects, each plate is formed by press working, and the punching directions of the press working coincide with each other. It is laminated as follows. According to this, when stacking the respective plates, the contact between the burrs generated on the respective plates due to the press working is avoided, and the adhesion between the plates is improved, so that the yield at the time of manufacturing the stacked heat exchanger is improved. Is improved.

A ninth aspect of the present invention relates to a method of manufacturing a laminated heat exchanger according to any one of the first to eighth aspects, wherein each plate is formed by press working, and A step of plating a path plate on both sides thereof; a step of laminating the respective plates so that the punching directions of the pressing work coincide with each other; and a step of heating the laminated plates in close contact with each other. Is a manufacturing method. According to this, when laminating each plate, abutting of burrs generated on each plate by press working is avoided, and the adhesion between the plates is improved, and the bonding between the plates is performed using a brazing using plating. As a result, the yield and reliability of the stacked heat exchanger during production are improved.

[0020] The invention of claim 10 relates to a method of manufacturing a laminated heat exchanger according to any one of claims 1 to 8, wherein each plate is formed by press working; A step in which each plate is coated with a paste brazing material on a surface on an upstream side in a punching direction of the press working; a step of laminating each plate so that the punching directions in the press working coincide with each other; This is a manufacturing method including a step in which the heated plate is heated in a state of being in close contact with the plate. According to this method, since a paste-like brazing material that is less expensive than plating is used, the manufacturing cost of the plate heat exchanger can be reduced. Also, for each plate,
Since the brazing material is applied to the surface on the upstream side in the punching direction of the press working, that is, the surface where the burrs do not protrude, damage due to burrs on a jig such as a mask used for applying the brazing material is reduced, and the stacking type heat exchange The reliability at the time of manufacturing the container is improved.

[0021]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 shows a configuration of a laminated heat exchanger according to Embodiment 1 of the present invention, and a part thereof is disassembled so that its internal configuration can be described.

As shown in FIG. 1, the laminated heat exchanger according to the present embodiment is formed by laminating a plurality of flow path plates 31 having a plurality of flow paths 34 and 35 penetrating the plate surface. This is a configuration arranged between the end plates 32 and 33. At this time, the flow passages 34 and 35 are provided adjacent to each other and in parallel, and the heat exchange fluid A flowing through the flow passage 34 and the heat exchange fluid B flowing through the flow passage 35 face each other.

The flow path plate 31 has an inlet header section 40 and an outlet header section 41 communicating with both ends of the flow path 34 in the longitudinal direction, and an inlet header section 42 and a flow path of the inlet header section 42 communicating with the longitudinal ends of the flow path 35. Exit header part 43
Are provided respectively.

The end plate 32 has an inlet pipe 36 and an outlet pipe 37 for the heat exchange fluid A, and an inlet pipe 38 and an outlet pipe 39 for the heat exchange fluid B. The inlet pipe 38 and the outlet pipe 39 are respectively provided with an inlet header section 40 of the heat exchange fluid A.
And the outlet header portion 41. Similarly, the inlet pipe 38 and the outlet pipe 39 communicate with the inlet header section 42 and the outlet header section 43 of the heat exchange fluid B, respectively.

The heat exchange fluid A flows into the inlet header section 40 from the inlet pipe 36 provided in the end plate 32 and flows into the flow path 34 formed in the flow path plate 31 as shown by a solid arrow in the drawing. enter. Heat exchange fluid A flowing through channel 34
Are collected in the outlet header 41 and flow out of the outlet pipe 37. On the other hand, the heat exchange fluid B flows into the inlet header section 42 from the inlet pipe 38 provided in the end plate 32 as shown by the dotted arrow in the figure, and flows into the flow path 35 formed in the flow path plate 31. enter. The heat exchange fluid B flowing through the flow path 35 is collected in the outlet header 43 and flows out of the outlet pipe 39. At this time, the heat exchange fluid A flowing through the flow path 34 exchanges heat with the heat exchange fluid B flowing through the flow path 35 via the partition 44 located between the flow paths 34 and 35.

As shown in FIG. 1, since the flow passages 34 and 35 are provided at positions opposed to each other except for the vicinity of each header via the partition 44, the heat exchange fluids A and B are opposed to each other. The heat exchange can be performed in the form of: Generally, the counterflow is a heat transfer mode having higher heat exchange characteristics as compared with the cross-flow or the parallel flow which is the heat transfer mode of the conventional laminated heat exchanger. In addition, since the partition plate as shown in the conventional example can be eliminated and only the flow path plate 31 can be used, the plate configuration can be simplified. In addition, since the flow path is formed by laminating a plurality of thin flow path plates 31, the flow path is easier to form than a thick plate, and the manufacturing cost is reduced.

Therefore, with the above-described configuration, it is possible to realize high performance, miniaturization, and reduction in manufacturing cost of the stacked heat exchanger.

(Embodiment 2) FIG. 2 shows a configuration of a laminated heat exchanger according to Embodiment 2 of the present invention, and a part thereof is disassembled so that the internal configuration can be described.

As shown in FIG. 2, the laminated heat exchanger of this embodiment is formed by laminating a plurality of flow path plates 31 each having a plurality of flow paths 34 and 35 penetrating the plate surface. In this configuration, a partition plate 59 is inserted every other one of the plates 31 and arranged between a pair of end plates 32 and 33.
At this time, the flow passages 34 and 35 are provided at positions adjacent to and parallel to each other, and the heat exchange fluid A flowing through the flow passage 34 and the flow passage 3
5 and the heat exchange fluid B flowing therethrough.

The flow path plate 31 has an inlet header section 40 and an outlet header section 41 communicating with both ends in the longitudinal direction of the flow path 34, and an inlet header section 42 and an outlet header section 42 communicating with the longitudinal ends of the flow path 35. Exit header part 43
Are provided respectively.

On the other hand, the through-holes 60 and 61 communicating with the inlet header section 40 and the outlet header section 41 of the flow path 34 are formed in the partition plate 59 when the respective plates are stacked.
And through holes 62 and 63 communicating with the inlet header section 42 and the outlet header section 43 of the flow path 35, respectively.

The end plate 32 is provided with an inlet pipe 36 and an outlet pipe 37 for the heat exchange fluid A, and an inlet pipe 38 and an outlet pipe 39 for the heat exchange fluid B. The inlet pipe 38 and the outlet pipe 39 are respectively provided with an inlet header section 40 of the heat exchange fluid A.
And the outlet header portion 41. Similarly, the inlet pipe 38 and the outlet pipe 39 communicate with the inlet header section 42 and the outlet header section 43 of the heat exchange fluid B, respectively.

The heat exchange fluid A flows into the inlet header section 40 from the inlet pipe 36 provided on the end plate 32 as shown by the solid arrow in the drawing, and passes through the through hole 60.
The flow enters the flow path 34 formed in the flow path plate 31. Channel 3
The heat exchange fluid A that has flowed through 4 is collected in the outlet header section 41 and flows out of the outlet pipe 37 through the through hole 61. On the other hand, the heat exchange fluid B flows into the inlet header section 42 from the inlet pipe 38 provided in the end plate 32 as shown by the dotted arrow in the drawing, and passes through the through hole 62 to form the same flow path plate 31. Into the flow path 35 formed at the bottom. The heat exchange fluid B flowing through the flow path 35 is supplied to the outlet header 4
3 and flows out from the outlet pipe 39 through the through hole 63. At this time, the heat exchange fluid A flowing through the flow path 34 exchanges heat with the heat exchange fluid B flowing through the flow path 35 via the partition 44 located between the flow paths 34 and 35.

As shown in FIG. 2, since the flow passages 34 and 35 are provided at positions opposed to each other except for the vicinity of each header via the partition 44, the heat exchange fluids A and B are opposed to each other. The heat exchange can be performed in the form of: Generally, the counterflow is a heat transfer mode having higher heat exchange characteristics as compared with the cross-flow or the parallel flow which is the heat transfer mode of the conventional laminated heat exchanger.

Here, in the configuration of the first embodiment, a case where the number of stacked flow path plates 31 is increased in order to increase the heat exchange performance of the stacked heat exchanger is considered. At this time, the lamination height of the flow path plate is increased, and the total area in the heat transfer direction of the partition 44 between the flow paths 34 and 35 is increased. The partition portion 44 serves as a heat transfer surface for the heat exchange fluid flowing through the flow paths 34 and 35, and at the same time, prevents deformation of the flow path even when there is a pressure difference between the heat exchange fluids A and B. It has a function as a pressure partition. When the area of the partition 44 increases, the area receiving the pressure also increases, so that the mechanical strength of the partition 44 decreases. In this embodiment, a plurality of flow path plates 3
The partition 44 is finely divided in the stacking height direction by inserting the partition plate 59 between them, and the area for receiving pressure is reduced, thereby improving the mechanical strength of the heat exchanger as a pressure vessel.

Therefore, with the above-described configuration, in addition to the performance enhancement of the stacked heat exchanger, the reliability can be improved.

(Embodiment 3) FIG. 3 shows a configuration of a laminated heat exchanger according to Embodiment 3 of the present invention, and a part thereof is disassembled so that its internal configuration can be described.

As shown in FIG. 3, the laminated heat exchanger of the present embodiment alternates the flow path plate 31 in which a plurality of flow paths 34 and 35 penetrating the plate surface are formed via a partition plate 59. In this configuration, a plurality of sheets are stacked and arranged between a pair of end plates 32 and 33. At this time, the flow passages 34 and 35 are provided adjacent to each other and in parallel, and the heat exchange fluid A flowing through the flow passage 34 and the heat exchange fluid B flowing through the flow passage 35 face each other.

The flow path plate 31 has an inlet header section 40 and an outlet header section 41 communicating with both ends in the longitudinal direction of the flow path 34, and an inlet header section 42 and an exit header section 41 communicating with the longitudinal ends of the flow path 35. Exit header part 43
Are provided respectively.

On the other hand, the through-holes 60 and 61 communicating with the inlet header section 40 and the outlet header section 41 of the flow path 34 are formed in the partition plate 59 when the respective plates are stacked.
And through holes 62 and 63 communicating with the inlet header section 42 and the outlet header section 43 of the flow path 35, respectively.

The end plate 32 is provided with an inlet pipe 36 and an outlet pipe 37 for the heat exchange fluid A, and an inlet pipe 38 and an outlet pipe 39 for the heat exchange fluid B. The inlet pipe 38 and the outlet pipe 39 are respectively provided with an inlet header section 40 of the heat exchange fluid A.
And the outlet header portion 41. Similarly, the inlet pipe 38 and the outlet pipe 39 communicate with the inlet header section 42 and the outlet header section 43 of the heat exchange fluid B, respectively.

The heat exchange fluid A flows into the inlet header section 40 from the inlet pipe 36 provided in the end plate 32 as shown by the solid line arrow in the drawing, and passes through the through hole 60.
The flow enters the flow path 34 formed in the flow path plate 31. Channel 3
The heat exchange fluid A that has flowed through 4 is collected in the outlet header section 41 and flows out of the outlet pipe 37 through the through hole 61. On the other hand, the heat exchange fluid B flows into the inlet header section 42 from the inlet pipe 38 provided in the end plate 32 as shown by the dotted arrow in the drawing, and passes through the through hole 62 to form the same flow path plate 31. Into the flow path 35 formed at the bottom. The heat exchange fluid B flowing through the flow path 35 is supplied to the outlet header 4
3 and flows out from the outlet pipe 39 through the through hole 63. At this time, the heat exchange fluid A flowing through the flow path 34 exchanges heat with the heat exchange fluid B flowing through the flow path 35 via the partition 44 located between the flow paths 34 and 35.

As shown in FIG. 3, since the flow paths 34 and 35 are provided at positions opposed to each other except for the vicinity of each header via the partitioning section 44, the heat exchange fluids A and B are opposed to each other. The heat exchange can be performed in the form of: Generally, the counterflow is a heat transfer mode having higher heat exchange characteristics as compared with the cross-flow or the parallel flow which is the heat transfer mode of the conventional laminated heat exchanger.

Here, in the configuration of the first embodiment, a case where the number of stacked flow passage plates 31 is increased to enhance the heat exchange performance of the stacked heat exchanger is considered. At this time, the lamination height of the flow path plate is increased, and the height of the flow path through which the heat exchange fluid flows becomes extremely high. If this channel height is high,
Unevenness occurs in the flow of the fluid, which causes deterioration of the heat exchange characteristics. In particular, when the heat exchange fluid undergoes a phase change from liquid to gas or gas to liquid in the process of performing heat exchange, the flow of the fluid may be significantly biased due to the density difference. In this embodiment, a partition plate 59 is provided between the flow path plates 31 and the flow path height is set to the flow path plate 31.
Because of the thickness of one sheet, even in heat exchange involving a phase change, the flow of the fluid is less likely to be biased,
Uniform distribution of the heat exchange fluid to each flow path can be achieved.

Therefore, with the above-described configuration, it is possible to further improve the performance of the stacked heat exchanger.

(Embodiment 4) FIG. 4 shows a configuration of a laminated heat exchanger according to Embodiment 4 of the present invention, and a part is disassembled so that the internal configuration can be described. The stacked heat exchanger of the present invention has a configuration similar to that of FIG.
Are provided with substantially U-shaped folded portions 45 and 46, respectively.

By providing a substantially U-shaped folded portion in the flow path, not only a linear flow path but also an arbitrary flow path such as a rectangular shape or a spiral shape can be formed on the plate. This means that the length of the heat exchanger in the vertical direction or the horizontal direction can be made sufficiently small for an extremely long flow path.

Therefore, with the above-described configuration, it is possible to further reduce the size of the stacked heat exchanger.

The same effect can be obtained also in the stacked heat exchanger having the configuration shown in FIGS. 2 and 3 if the flow paths 34 and 35 each have a substantially U-shaped folded portion. .

Fifth Embodiment In a fifth embodiment of the present invention, in the laminated heat exchanger having the structure shown in FIG. 4, the flow paths 34 and 35 have the substantially U-shaped folded portions 45 and 4 respectively.
6, and the width of at least one of the flow paths 34 and 35 is substantially the same in the longitudinal direction.

FIG. 5 is a structural view of the flow path plate 31 and shows the shape of the flow path 34 in detail. Channel 34
Is provided with header portions 40 and 41 forming both ends of the inlet and outlet headers of the heat exchange fluid A at both ends, and is constituted by a straight portion 47 and a folded portion 45 communicating with these. The flow passage width T1 of the straight portion 47 and the flow passage width T2 of the folded portion 45 are substantially the same. The flow path 35 of the heat exchange fluid B has the same shape.

When the width of the flow path is not substantially the same in the longitudinal direction of the flow path, especially when the folded portion of the flow path has a rectangular shape, the flow path has a corner. When the heat exchange fluid passes through the corner of the flow path, the fluid near the corner is hindered from flowing smoothly, and the fluid is likely to stay. This stagnation of the fluid hinders heat exchange between the flow paths via the partition 44 and becomes a factor of deteriorating the performance of the entire heat exchanger.

In the present embodiment, since the width of the flow path 34 is substantially the same in the longitudinal direction of the flow path, particularly in the straight section 47 and the return section 45, the heat exchange fluid A is supplied to the return section 45 of the flow path 34. Can flow smoothly without stagnation. The same applies to the channel 35 facing the channel 34.

Therefore, with the above-described configuration, it is possible to further improve the performance of the stacked heat exchanger.

Note that, also in the stacked heat exchanger having the configuration shown in FIGS. 2 and 3, each of the flow paths 34 and 35 has a substantially U-shaped folded portion and at least one of the flow paths 34 and 35. The same effect can be obtained if the width of the flow path is substantially the same in the longitudinal direction.

(Embodiment 6) In a sixth embodiment of the present invention, in the laminated heat exchanger having the structure shown in FIG. 4, the flow paths 34 and 35 have the substantially U-shaped folded portions 45 and 4 respectively.
6 and the flow path 3 of the same fluid, for example, the heat exchange fluid A, located adjacent to each other on the flow path plate 31.
4, the distance between the different fluids located next to each other,
It is larger than the distance between the flow paths 34 and 35 of the heat exchange fluids A and B.

FIG. 6 is a structural view of the flow path plate 31 and shows the shapes of the flow paths 34 and 35 in detail. For example, since the flow path 34 includes the folded portion 45, the flow path 34 has a portion that flows in a position adjacent to each other while being a flow path of the same fluid. Therefore, the heat exchange fluid A may exchange heat with the heat exchange fluid B via the partition 44 and also exchange heat with the same heat exchange fluid A flowing in the adjacent portion of the flow path 34. In the present embodiment, the distance T3 between the flow paths 34 is made larger than the distance T4 between the flow paths 34 and 35. According to this, the thermal resistance between the adjacent flow paths 34 becomes larger than the thermal resistance between the adjacent flow paths 34 and 35, and the heat transfer between the heat exchange fluids A is reduced. The same applies to the flow channel 35 provided with the folded portion 46.

Therefore, according to the above configuration, the heat exchange of the heat exchange fluid between the same flow paths is reduced, so that the performance of the stacked heat exchanger can be further improved.

In the stacked heat exchanger having the structure shown in FIGS. 2 and 3, each of the flow paths 34 and 35 has a substantially U-shaped folded portion and is adjacent to each other on the flow path plate 31. The same effect can be obtained if the distance between the flow paths of the same fluid is larger than the distance between the flow paths of different fluids adjacent to each other.

(Embodiment 7) FIG. 7 shows the configuration of a laminated heat exchanger according to Embodiment 7 of the present invention, and a part is disassembled so that the internal configuration can be described.

In the stacked heat exchanger of this embodiment, the flow paths 34 and 35 are substantially U-shaped, similarly to the configuration shown in FIG.
Having folded portions 45 and 46 in the shape of
The flow paths 3 at positions adjacent to each other on the flow path plate 31
4 in that a through-hole 48a is provided between them. The end plates 32 and 33 are also provided with through holes 48b and 48c at positions facing the through holes 48a.

As shown in FIG. 7, when the flow path 34 has a substantially U-shaped folded portion 45, the heat exchange fluid A is supplied to the partition 4
4, heat exchange with the heat exchange fluid B,
4 may also exchange heat with the same heat exchange fluid A flowing in adjacent portions. However, according to the present embodiment, since the through holes 48a are formed between the flow paths 34 adjacent to each other, the transfer of heat between the same flow paths in this portion is completely shut off. The same effect can be obtained on the flow channel 35 side by providing a through hole between the same flow channels located adjacent to each other in the flow channel 35.

Therefore, according to the above configuration, the heat exchange of the heat exchange fluid between the same flow paths is completely shut off.
A remarkable improvement in performance of the stacked heat exchanger can be realized.

Note that, also in the stacked heat exchanger having the configuration shown in FIGS. 2 and 3, the flow paths 34 and 35 each have a substantially U-shaped folded portion and are adjacent to each other on the flow path plate 31. A similar effect can be obtained by providing a through-hole between the flow paths 34 at the positions, and further providing a through-hole communicating with this through-hole on the partition plate 59 at a position facing the through-hole.

(Eighth Embodiment) In the eighth embodiment of the present invention, in the laminated heat exchanger shown in FIG. 1, the flow paths 34 and 35 of the flow path plate 31, the outer peripheral shape and the like are formed by press working. The layers are stacked so that the punching directions of the pressing work match.

In general, when a through hole is formed in a plate by press working, a projection-like burr is formed at the contour of the through hole. The burrs are formed on the plate surface on the downstream side in the punching direction of the press working. When the burrs abut upon each other when the plates are stacked, the adhesion between the plates is impaired, resulting in poor bonding. As in the present embodiment, when the plates are stacked so that the punching directions of the press work coincide with each other, the burrs do not come into contact with each other, and the adhesion between the plates is improved.

Therefore, with the above-described configuration, the production yield of the laminated heat exchanger is improved.

In the laminated heat exchanger having the structure shown in FIGS. 2 and 3, the flow path, the through holes, and the outer peripheral shape of the flow path plate 31 and the partition plate 59 are formed by press working. The same effect can be obtained if the layers are stacked so that the punching directions of them coincide.

(Embodiment 9) Next, a method of manufacturing the laminated heat exchanger described in Embodiments 1 to 8 will be specifically described. This embodiment assumes that all the plates are made of a metal material having excellent thermal conductivity, such as stainless steel, copper, and aluminum.

FIG. 8 is a cross-sectional view taken along the arrow CC of the stacked heat exchanger shown in FIG. 1, and shows the installation state of the brazing material at the time of stacking. Between the upper and lower end plates 32 and 33, a flow path plate 31 provided with a plating layer indicated by a brazing material 51 on the entire surface is sequentially laminated.

First, the flow paths 34 and 3 to the flow path plate 31
5. The processing of the through-holes such as the inlet header section 40 is performed by press processing excellent in mass productivity.

Next, the surface of the flow path plate 31 in which the through holes such as the flow path and the header section are formed is plated. When the material of the flow path plate 31 is stainless steel having excellent corrosion resistance, plating may be performed, for example, using nickel and phosphorus as main components. This plating process is usually
It is performed by an electroless plating method. In addition, the flow path plate 31
When the material is copper having a high thermal conductivity, for example, plating containing silver as a main component may be performed.

Further, all the plates are stacked so that the punching direction of the press working coincides with the direction indicated by the arrow in the figure.

Lastly, the laminated plates are heated in a state where they are in close contact with each other, so that the plating layers are melted and integrally joined.

At this time, since the pressed plates are laminated so that the burrs are aligned in the same direction, deterioration of the adhesion due to the contact between the burrs is avoided, and the bonding between the plates is performed by plating. Is assured by brazing.

Therefore, it is possible to provide a stacked heat exchanger which is excellent in yield and highly reliable.

In the present embodiment, it is assumed that plating is applied to the surfaces of all the flow path plates 31. However, the plated flow path plates and the non-plated flow path plates are alternately arranged. It is good also as what laminates and joins. In this case, since the amount of plating as a brazing material is reduced, the manufacturing cost of the heat exchanger is reduced. In addition, since the flow path is not blocked by the brazing material, which is generated when the amount of the brazing material is excessive, the reliability of the heat exchanger is improved.

Also, in the laminated heat exchanger having the structure shown in FIGS. 2 and 3, the flow path plate 31 and the partition plate 59 are formed by pressing, and the flow path plate 31 is plated on both sides. The steps to be processed;
The same effect can be obtained by performing a manufacturing method including a step in which the respective plates are stacked so that the punching directions of the press working coincide with each other, and a step in which the stacked plates are heated in a state of being in close contact. Can be

(Embodiment 10) Next, a method of manufacturing the laminated heat exchanger described in Embodiments 1 to 8 will be specifically described.
In this embodiment, in particular, all the plates are made of stainless steel, copper,
It is assumed that it is made of a metal material having excellent thermal conductivity such as aluminum.

FIG. 9 shows a cross section taken along the arrow CC of the stacked heat exchanger shown in FIG. 1, and clearly shows the installation state of the brazing material at the time of stacking. Between the upper and lower end plates 32 and 33, the flow path plate 31 having the brazing material 52 applied only on the upper surface is sequentially laminated.

First, the flow paths 34 and 3 to the flow path plate 31
5. The processing of the through-holes such as the inlet header section 40 is performed by press processing excellent in mass productivity.

Next, a brazing material is applied to the flow path plate 31. As the brazing material, a paste wax in which a binder is mixed with a powdery brazing material is used. The application of the paste wax is performed by a printing method such as a silk screen process using a coating mask. In the present embodiment, the brazing material 52 is applied to the upper surface of the flow path plate 31 by using a mask having openings having substantially the same shape as the flow path plate 31. Here, the application of the brazing material is performed on the surface (upper surface in the figure) on the upstream side in the punching direction of the press working of each plate. When the material of each plate is stainless steel, it is preferable to use, for example, a Ni-based brazing material, and when the material is copper, it is preferable to use, for example, a silver or phosphorous copper-based material.

Further, all the plates are laminated so that the punching direction of the press working coincides with the direction indicated by the arrow in the figure.

Finally, by heating each plate on which the brazing material has been applied and laminated in a state of being in close contact with each other, the brazing material component of the paste wax is melted and integrally joined.

Therefore, the bonding between the plates is reliably ensured by the brazing using the paste brazing. In addition, since a paste-like brazing material that is less expensive than plating is used, the manufacturing cost of the heat exchanger can be reduced. further,
Since the brazing material is applied to the surface of each plate where the burrs do not protrude, damage caused by burrs on a jig such as a mask used for applying the brazing material is reduced, and reliability during manufacturing is improved.

Note that also in the stacked heat exchanger having the configuration shown in FIGS. 2 and 3, the flow path plate 31 and the partition plate 59 are formed by press working, and each plate is formed by punching in the press working. A step of applying a paste-like brazing material to the surface on the upstream side in the direction, and a step of laminating the respective plates so that the punching directions of the press processing coincide with each other, and in a state where the laminated plates are in close contact with each other. The same effect can be obtained if the production is performed by a production method including a heating step.

In the first, second and third embodiments of the present invention, the heat exchange fluid A flowing through the flow path 34 and the heat exchange fluid B flowing through the flow path 35 are opposed to each other. If is not significantly reduced, the heat exchange fluids A and B may flow in parallel with each other.

[0089]

As described above, according to the first aspect of the present invention,
Has a configuration in which a plurality of flow path plates in which a plurality of flow paths A and flow paths B penetrating the plate surface are formed, and a plurality of flow path plates are disposed between a pair of end plates, Road A
And the flow path B are provided adjacent to and in parallel with each other, so that the heat exchange fluids A and B can perform heat exchange in the form of counter-current flow. Higher performance and smaller size can be realized.

The stacked heat exchanger according to the second aspect of the present invention is characterized in that a plurality of flow path plates having a plurality of flow paths A and B penetrating the plate surface are stacked, and a plurality of the flow path plates are formed. Every other partition plate is inserted and disposed between a pair of end plates, and the flow path A and the flow path B are arranged adjacent to each other and in parallel, so that the flow path plate Even when the number of laminations is large and the flow path height is high, the mechanical strength as a pressure vessel is improved by inserting a partition plate between a plurality of flow path plates. The reliability of the stacked heat exchanger can be improved.

Further, in the laminated heat exchanger according to the third aspect, a plurality of flow path plates in which a plurality of flow paths A and flow paths B penetrating the plate surface are alternately laminated via a partition plate,
It has a configuration arranged between a pair of end plates, and the channel A and the channel B are provided at positions adjacent to and parallel to each other. Even when the pressure rises, by alternately laminating the flow path plates via the partition plates, the mechanical strength of the pressure vessel is improved, and each flow path is divided so that the flow of the heat exchange fluid can be made uniform. Therefore, in addition to the effect of the first aspect, it is possible to further improve the performance and reliability of the stacked heat exchanger.

The stacked heat exchanger according to claim 4 is characterized in that, in addition to the invention described in any one of claims 1 to 3, the flow path A
And the flow path B has a substantially U-shaped folded portion, so that the length of the heat exchanger in the vertical direction or the horizontal direction can be sufficiently reduced with respect to the flow path length. Further downsizing can be realized.

Further, in the stacked heat exchanger according to the fifth aspect, in addition to the fourth aspect, the width of at least one of the flow path A and the flow path B is substantially equal to the width in the longitudinal direction of the flow path. Since they are the same, each fluid can flow smoothly in the flow path,
Since the deterioration of the heat transfer performance due to the stagnation of the fluid is eliminated, the higher performance of the stacked heat exchanger can be realized.

In the laminated heat exchanger according to the sixth aspect of the present invention, in addition to the fourth or fifth aspect, the distance between the flow paths of the same fluid at adjacent positions on the flow path plate is adjacent to each other. Since the distance between the flow paths of the different fluids at the position is larger, the thermal resistance between the flow paths of adjacent same fluids is larger than the thermal resistance between the flow paths of adjacent different fluids. Since movement is reduced, higher performance of the stacked heat exchanger can be realized.

Further, the stacked heat exchanger of claim 7 is characterized in that, in addition to the invention described in any one of claims 4 to 6, between the flow paths of the same fluid at mutually adjacent positions on the flow path plate. Since a through-hole is provided and a through-hole communicating with the through-hole is provided at a position on the other plate facing the through-hole,
Since the transfer of heat between the same fluids in the flow passages adjacent to each other is completely blocked, the performance of the stacked heat exchanger can be significantly improved.

In the laminated heat exchanger according to the eighth aspect, in addition to the invention as set forth in any one of the first to sixth aspects, each plate is formed by press working, and the punching directions of the press working coincide with each other. When stacking each plate, the press work prevents the burrs generated on each plate from abutting on each other and improves the adhesion between the plates. Yield is improved.

[0097] The invention of claim 9 relates to a method of manufacturing the laminated heat exchanger according to any one of claims 1 to 8, wherein each plate is formed by press working, and A step of plating a path plate on both sides thereof; a step of laminating the respective plates so that the punching directions of the pressing work coincide with each other; and a step of heating the laminated plates in close contact with each other. When laminating each plate, contact between burrs generated on each plate by press working is avoided, and the adhesion between the plates is improved, and the bonding between the plates is plated. Since the assurance is assured by the brazing used, the yield and reliability at the time of manufacturing the laminated heat exchanger are improved.

[0098] Further, the invention of claim 10 relates to a method of manufacturing a laminated heat exchanger according to any one of claims 1 to 8, wherein each plate is formed by pressing. A step in which each plate is coated with a paste brazing material on a surface on an upstream side in a punching direction of the press working; a step of laminating each plate so that the punching directions in the press working coincide with each other; Since the manufacturing method includes a step in which the plated plate is heated in a state of being in close contact with the plate, the manufacturing cost of the plate heat exchanger can be reduced because a paste-like brazing material that is less expensive than plating is used. In addition, since the brazing material is applied to the surface on the upstream side in the punching direction of the press working, that is, the surface on which the burrs do not protrude, the jig such as a mask used for applying the brazing material is damaged by burrs. Is reduced, and improvement in reliability at the time of manufacturing the laminated heat exchanger is realized.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a laminated heat exchanger according to embodiments 1 and 8 of the present invention.

FIG. 2 is a configuration diagram of a laminated heat exchanger according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram of a laminated heat exchanger according to a third embodiment of the present invention.

FIG. 4 is a configuration diagram of a laminated heat exchanger according to Embodiments 4, 5, and 6 of the present invention.

FIG. 5 is a configuration diagram of a flow path plate of a laminated heat exchanger according to a fifth embodiment of the present invention.

FIG. 6 is a configuration diagram of a flow path plate of a laminated heat exchanger according to a sixth embodiment of the present invention.

FIG. 7 is a configuration diagram of a laminated heat exchanger according to a seventh embodiment of the present invention.

FIG. 8 is a sectional view of a laminated heat exchanger according to a ninth embodiment of the present invention.

FIG. 9 is a cross-sectional view of a laminated heat exchanger according to Embodiment 10 of the present invention.

FIG. 10 is a configuration diagram of a conventional laminated heat exchanger.

[Explanation of symbols]

 31 flow path plate 32, 33 end plate 34, 35 flow path

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takeshi Watanabe 1006 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. F-term (reference) 3L103 AA05 CC18 CC30 DD13 DD57 DD58

Claims (10)

[Claims] A plurality of flow paths A and B penetrating a plate surface.
Is formed between a pair of end plates by laminating a plurality of flow path plates in which the flow path A and the flow path B are provided adjacent to each other and in parallel with each other. vessel. 2. A plurality of flow paths A and B penetrating a plate surface.
A plurality of flow path plates formed with a plurality of the flow path plates, a partition plate is inserted every other one of the flow path plates, and is disposed between a pair of end plates. The flow path A and the flow path B Are provided adjacent to and parallel to each other. 3. A plurality of flow paths A and B penetrating a plate surface.
Are formed by alternately laminating a plurality of flow path plates via a partition plate and disposed between a pair of end plates, wherein the flow path A and the flow path B are adjacent to each other and in parallel positions. Laminated heat exchanger provided. 4. The stacked heat exchanger according to claim 1, wherein the flow path A and the flow path B have a substantially U-shaped folded portion. 5. The stacked heat exchanger according to claim 4, wherein the width of at least one of the flow path A and the flow path B is substantially the same in the longitudinal direction of the flow path. 6. The distance between flow paths of the same fluid at positions adjacent to each other on the flow path plate is larger than the distance between flow paths of different fluids at positions adjacent to each other.
A stacked heat exchanger as described. 7. A through hole is provided between flow paths of the same fluid at positions adjacent to each other on a flow path plate, and a through hole communicating with the through hole is provided on another plate at a position facing the through hole. The stacked heat exchanger according to any one of claims 4 to 6, further comprising: 8. Each plate is formed by press working,
The laminated heat exchanger according to any one of claims 1 to 7, wherein the laminated heat exchangers are laminated so that punching directions of the press working coincide with each other. 9. A step in which each plate is formed by press working, a step in which a flow path plate is plated on both surfaces thereof, and said plates are laminated so that a punching direction of said press working coincides. 9. The method for manufacturing a stacked heat exchanger according to claim 1, comprising a step of heating the stacked plates in a state where the stacked plates are in close contact with each other. 10. A step in which each plate is formed by press working, a step in which each plate is coated with a paste brazing material on an upstream surface in a punching direction of the press working, and The laminated heat exchanger according to any one of claims 1 to 8, comprising: a step of laminating the sheets so that the punching directions of the pressing work coincide with each other; and a step of heating the laminated plates in close contact with each other. Production method.