JP2001050684A - Heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the fabricating work of a tank by a method wherein a tank plate part is provided in one plate material, while an end plate part, wherein a tube insertion hole is formed, is provided, and a baffle plate part is provided at a fluid inlet port of the tank. SOLUTION: An end plate part 7A is provided on one rectangular metal plate material 401, while tank plate segments 6A, 6B, 6C, 6D are provided. In the plate material 401, a segment 5A and a segment 5B for contact with the segment 5A are provided, while a baffle plate part 10 is extended from the segment 5B. With this arrangement, a tank comprising the tank plate segments 6A, 6B, 6C, 6D, segment 5A, end plate part 7A, and baffle plate part 10 can be formed from one plate material 401. Thus, there is no need to separately perform fabricating and assembling processes, and hence the tank can be easily fabricated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger for an automobile engine cooling system.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 12 to 15, a heat exchange fluid flow path 1 and a return flow path 2 are formed in a plurality of flat shapes which are stacked and arranged via fins 20. , A tank 4 installed above the plurality of tubes 3, 3,..., And a heat exchanger composed of a heat exchange fluid inlet pipe 8 and an outlet pipe 9 attached to the tank 4. It has been known.

As shown in FIGS. 14 and 15, the tank 4 is provided with an end plate 7 having a tube insertion hole 7c through which the upper end of each tube 3, 3. Box lid-shaped tank plate 6 having a hole 6m and a hole 6n for mounting an outlet pipe 9
And the fluid inlet 4m and the fluid outlet 4 in the tank 4.
and a partition plate 5 for partitioning the n. At the lower end of the partition plate 5, a recess 5a is formed at a position corresponding to the tube insertion hole 7c of the end plate 7.
Is formed, and the tube 3 is mounted so that the upper end side of the partition portion 3f abuts on the concave portion 5a. The upper end of the partition plate 5 is provided with a concave portion 6 formed in the tank plate 6.
u, and a protruding piece 5b provided at a part of the upper end of the plate 5 is fitted into a hole 6s formed in the recess 6u. Further, a plurality of claws 7t are formed on a rising portion 7m provided on the outer periphery of the end plate 7,
The tank plate 6 is attached to the end plate 7 by caulking the claws 7t so as to correspond to the inclined portions 6x formed on the lower side of the tank plate 6. The tube 3, the fin 20, and the tank 4 are made of, for example, a clad material in which a brazing material is clad on an aluminum alloy core material. After the tube 3, the fin 20, and the tank 4 are assembled, each member is brazed in a furnace. By joining, the heat exchanger is completed.

In the above-described heat exchanger, the heat exchange fluid flowing from the inlet pipe 8 is supplied to the fluid inlet 4 m in the tank 4.
After being once introduced into the flow path, a U-turn is made through the flow path 1 of the tube 3 and the return path 2 and the fluid outlet 4 in the tank 4
Then, it flows out of the outlet pipe 9 through n (called a counter flow type).

In the heat exchanger having the above structure, the heat exchange fluid flowing from the inlet pipe 8 directly collides with the end plate 7 or directly flows into the inflow portion of the tube 3, so-called hot water erosion. Problems occur. In order to solve the problem of hot water erosion, a heat exchanger in which a baffle member (hereinafter, referred to as a “baffle plate”) is installed in the fluid inlet 4 m in addition to the above configuration is disclosed in Japanese Patent Laid-Open No. 10-82596. It is publicly known by a gazette or the like.

[0006]

However, in the above-described heat exchanger tank, the end plate, the tank plate, the partition plate, and the baffle plate are separately manufactured and assembled. There was a problem that the manufacturing cost of the exchanger was increased. Furthermore, since the manufacturing and assembly process of each component is performed separately,
There were also the following issues. Since the number of brazing joints increases, poor joining is likely to occur between the components. In order to reduce the bonding failure, it is necessary to increase the precision of the dimensions and combination dimensions of each component. It is easy to forget to insert the partition plate and the baffle plate and to make mistakes in assembling the components. In particular, it is easy to cause an erroneous assembling such that the baffle plate, which must be installed in the fluid inlet to which the inlet pipe communicates, is mistakenly installed in the fluid outlet to which the outlet pipe communicates. Therefore, it was necessary to confirm the assembly. When the tank plate is assembled, the end plate and the like are likely to be deformed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a heat exchanger which can eliminate the above-mentioned problems without having to separately perform the manufacturing and assembling steps of each of the above components.

[0008]

In the heat exchanger according to the present invention, a single plate member is formed with a tank plate portion forming an outer wall of a tank and a tube insertion hole through which an end portion of a tube is inserted. An end plate portion and a baffle plate portion located at the fluid inlet portion of the tank to reduce the collision speed of the heat exchange fluid with the end plate portion and the flow rate into the tube are provided. To form a tank body having Further, an end cap for closing the openings at both ends of the tank body is provided on a side plate assembled so as to sandwich a plurality of tubes and fins to be stacked from both ends in the stacking direction, thereby forming a tank. In addition, an end cap piece for closing the openings at both ends of the tank body is provided at both ends of one sheet material to form the tank. The end cap pieces are provided so as to extend from one side of the opening at both ends of the tank body, or to extend from two opposite sides of the opening. Further, a plurality of holes are formed in the baffle plate portion, and each hole is provided with a straightening piece formed of a cut-and-raised piece forming each of the holes. Further, the one plate member was provided with a partition portion for partitioning a fluid inlet portion and a fluid outlet portion in the tank.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 1 to 7
FIG. 1 is a view showing a first embodiment of a heat exchanger according to the present invention, and the same components as those in FIGS. In each of the drawings, reference numeral 40 denotes a tank body of the heat exchanger according to the first embodiment, which is formed of one rectangular metal plate 401 as shown in FIG. 7A is an end plate portion, 6A, 6B,
6C and 6D are tank plate portions corresponding to conventional tank plates, 5A is a partition portion, and 5B is a partition portion 5A.
Is a baffle plate portion extending from the portion 5B. Reference numeral 11 denotes a fixing portion that is provided to extend to the baffle plate portion 10 and fixes the baffle plate portion 10 to the tank plate portion 6C.

In manufacturing the tank body 40, first, the following press working is performed. Baffle plate portion 10 in metal plate material 401
Next, as shown in FIGS. 3 and 6, a plurality of straightening pieces 10b formed of cut and raised pieces forming the holes 10a are formed at predetermined intervals. As shown in FIG. 3, a plurality of tube insertion holes 7c through which the upper end of the tube 3 is inserted are formed in the end plate portion 7A. As shown in FIG. 3, a mounting hole 6m for the inlet pipe 8 is formed in the tank plate portion 6D, and a mounting hole 6n for the outlet pipe 9 is formed in the tank plate portion 6B. The partition part 5A and the tank plate part 6B are bent through the bending line part 27 so as to be perpendicular to the end plate part 7A. Also, the fixing portion 11 is bent through the bending line portion 21 so as to be perpendicular to the end plate portion 7A. (Refer to FIG. 4A. This step may be performed by the following bending process.) Next, the following bending process is performed by a bending machine or an NC bending machine. The baffle plate portion 1 is provided via the bending line portion 22.
0 is bent perpendicular to the end plate portion 7A. Further, the partition portion 5A is bent via the bending line portion 28 in the direction of the end plate portion 7A such that the partition portion 5A is perpendicular to the tank plate portion 6B (FIG. 4).
(B)). The portion 5B is bent via the bending line portion 23 so as to be perpendicular to the end plate portion 7A. Also,
The tank plate portion 6A is bent so as to be perpendicular to the end plate portion 7A via the bending line portion 26, and the projection 5t provided at the tip 5f of the partition portion 5A is inserted into the hole 7s formed in the end plate portion 7A. Fit. Thereby, the tip 5f of the partition portion 5A is positioned in contact with the end plate portion 7A (FIG. 4).
(C)). The tank plate portion 6D is provided via the bending line portion 24.
Is perpendicular to the end plate portion 7A. Thus, the fixing portion 11 is positioned in a state of contacting the tank plate portion 6C (see FIG. 4D). The tank plate portion 6C is formed via the bending line portion 25.
Is perpendicular to the end plate portion 7A (see FIG. 4E). As a result, the portion 5B comes into contact with the partition portion 5A. As described above, the partition portion 5A
The fluid inlet portion 4m and the fluid outlet portion 4n are partitioned by a baffle plate portion 10 and the fluid inlet portion 4m is vertically partitioned by a baffle plate portion 10 as shown in FIG.
0 is formed.

As shown in FIG. 1, the tube 3 is attached to the lower portion of the tank body 40 thus formed through a tube insertion hole 7c, and as shown in FIG. End caps 41 having side plates 42 serving as jigs for sandwiching the tube 3 and the fins 20 from both ends in the openings 40e, 40e of the end cap 41.
Is attached, and brazing is performed in a furnace with the openings 40e, 40e closed. The side plates 42, 42 are assembled so as to sandwich the plurality of tubes 3 and the fins 20 to be laminated from both ends in the laminating direction, and projecting pieces 42e, 42e projecting in opposite directions to the fin 20 side are provided on both side edges. Is provided. After the side plates 42, 42 are brazed in a furnace while being fixed by being wound with a fastening material such as a wire, the fastening material is removed to complete the heat exchanger. 42s is a groove for hooking a fastening material.
After completion, the end plate portion 7A, the tank plate portions 6A, 6B, 6C, 6D, the partition portion 5A,
The baffle plate portion 10 functions as a conventional tank end plate, tank plate, partition plate, and baffle plate, respectively.

The metal plate 4 forming the tank body 40
01, tube 3, fin 20, end cap 41
May be used, for example, a clad material in which a brazing material is clad on both surfaces or one surface of an aluminum alloy core material.

As shown in FIG. 6, the baffle plate portion 10 has a plurality of holes 10a and rectifying pieces 10b.
Is provided, the rectifying piece 10b causes a relatively large foreign matter such as a lump of casting sand (often solidified by a coupling agent) or an engine gasket sealing material, a swarf when processing an engine part, and the like. Is trapped, the casting sand can be prevented from entering the tube, and the problem of hot water erosion can be solved.

According to the first embodiment, a tank having a tank plate portion, a partition portion, an end plate portion, and a baffle plate portion can be formed from a single plate material. Since it is not necessary to perform the operations separately, it is easy to manufacture the tank having the above-described portion, and a heat exchanger that can solve the problems of the related art can be obtained. According to the first embodiment, the end cap 41 including the side plate 42 serving as a jig is provided.
Is used, there is no need to use a separate dedicated clamping jig, and the working cost can be reduced. Although the operation cost is increased as compared with the case where the end cap 41 having the side plate 42 is used, an end cap not having the side plate 42 is used, and a dedicated clamping jig for clamping the tube and the fin from both ends is used. You may do so.

The hole 10a does not necessarily extend in a direction perpendicular to the longitudinal direction of the baffle plate portion 10, but may extend in a direction parallel or oblique to the longitudinal direction. Alternatively, a straightening piece formed by simply raising a rectangular or triangular piece upward or downward may be used. Further, as shown in FIG. 7, a baffle plate portion 10A may be provided in which only a plurality of holes 10s are formed so as to gradually increase as the distance from the inlet pipe 8 increases.

According to the first embodiment, the case where one metal plate material is bent as shown in FIG. 8A to form the tank main body has been described. Can be prevented from becoming thicker,
The folding patterns of the tank satisfying the above condition include the folding patterns shown in BP of FIG. Among these, the bending patterns A to D satisfy the conditions that the rigidity of the tank can be maintained and the number of bending points can be reduced. However, in the bending patterns B to D, the joining portion structure is required at the brazing portion r of the end plate portion, and the above cannot be satisfied. Therefore, the bending pattern A is optimal after all. As described above, the folding pattern of A is optimal, but it goes without saying that the tank may be formed by the folding patterns shown in BP.

Embodiment 2 FIG. According to the first embodiment, the tank body 40 and the end cap 41 are formed separately, but the end cap may be formed integrally with the tank body. That is, as shown in FIG. 9A, an end cap piece 41A extending from one side 40a of the opening 40e at both ends of the tank body 40 is provided. The end cap piece 41A is provided with brazing allowance pieces 41a to 41c. Then, the opening 40e may be closed with the end cap piece 41A, and the brazing allowance pieces 41a to 41c may be brought into contact with the inner surface of the tank body 40 (FIG. 9).
(B)) The brazing pieces 41a to 41c are attached to the tank main body 4.
9 (see FIG. 9).
(C)). In addition, the brazing allowances 41a to 41c are
In the case of contact with the inner surface of the baffle plate 0, as shown in FIG. 9A, slits 41 are formed in the brazing allowance pieces 41a and 41b corresponding to the baffle plate portion 10 and the partition portion 5A.
s is formed.

As shown in FIG. 10A, an end cap piece 41A extending from one side 40a of the opening 40e at both ends of the tank body 40 is provided, and the other three sides 40b to 40d of the opening 40e are provided. Brazing allowance 41d-42f
May be provided. In this case, brazing piece 4
After bending 1d to 42f, the end cap piece 41
A may close the opening 40e (see FIG. 10).
(B)) After closing the opening 40e with the end cap piece 41A, the brazing allowance pieces 41d to 42f may be bent (FIG. 10C).

Further, as shown in FIG.
The end cap pieces 41B, 41B in a so-called double-open state are provided on the two opposing sides of 0e, and the end cap pieces 41B, 41B are closed and the tank body 40B is closed.
May be closed. In FIGS. 9 and 10, when the brazing connection between the end cap piece 41A and the partition portion 5A is poor, the heat exchange fluid may be bypassed between the fluid inlet 4m and the fluid outlet 4n. However, in the case of FIG. 11, each end cap piece 41B,
Since the brazing allowances 41g and 41h are provided in 41B, the problem of the bypass as described above can be solved.

According to the second embodiment, the end cap for closing the openings 40e, 40e at both ends of the tank body 40 can be manufactured integrally with the tank body by using a single plate.
A heat exchanger that can easily manufacture a tank and solve the problems of the related art can be obtained.

The tank body may be formed of a resin plate instead of a metal plate. In this case, brazing is difficult to perform, so the bonding may be performed by another bonding method such as adhesion.

In the heat exchanger, as described above, the flow path 1 of the tube 3 and the return flow path 2 are communicated at the lower end (one end), and the tank 4 is provided only at the upper side (one end) of the tube 3. In addition to the single tank type (counter flow type) in which the inlet pipe 8 and the outlet pipe 9 are provided in the tank 4 and the flow path 1 and the return flow path 2 of the tube 3 are independent, There is a double tank type having a tank 4 on one side of the tube 3 and a tank on the other side without a partition and a baffle plate for diverting fluid.
In the case of both tank types, a type in which the tube 3 does not have the return flow path 2 and has a tank provided with an inlet pipe 8 on one side of the tube 3 and a tank provided with an outlet pipe 9 on the other side. is there. The present invention can be applied to any of the above types. That is, the present invention provides a plurality of tubes 3 stacked and arranged via the fins 20,
A tank 4 installed at one end of each of the plurality of tubes 3
The present invention can be applied to a heat exchanger having a heat exchange fluid inlet pipe 8 and an outlet pipe 9 attached to the tank 4. Also, a plurality of tubes 3 stacked and arranged via fins 20, tanks installed at both ends of the plurality of tubes 3, an inlet pipe 8 and an outlet pipe 9 for a heat exchange fluid attached to one of the tanks. The present invention can be applied to a heat exchanger having Furthermore, a plurality of tubes 3 stacked and arranged via fins 20, tanks installed at both ends of the plurality of tubes 3, an inlet pipe 8 for heat exchange fluid attached to one of the tanks, and the other tank The present invention can be applied to a heat exchanger having an outlet pipe 9 to be attached.

[0023]

According to the first aspect of the present invention, a tank having a tank plate portion, an end plate portion, and a baffle plate portion can be formed by one sheet material.
It is not necessary to separately perform the manufacturing and assembling steps of the tank plate, the end plate, and the baffle plate, and it is not necessary to confirm the assembling. Therefore, the tank manufacturing operation becomes easy, and the manufacturing cost of the heat exchanger can be reduced. In addition, compared to the case where the manufacturing and assembling processes of each component are performed separately, the number of brazed joints is reduced and deformation of the end plate etc. does not occur, so that a stable quality heat exchanger is obtained. Can be. In particular, production of baffle plate
This eliminates the need for a separate process for assembling, prevents erroneous assembling of the baffle plate, and eliminates the necessity of assembling confirmation, thereby facilitating the production of a tank having a baffle plate. Further, according to the invention according to claim 2, a tank is formed by providing an end cap for closing an opening at both ends of a tank on a side plate assembled so as to sandwich a plurality of tubes and fins to be stacked from both ends in a stacking direction. Therefore, in addition to the effect of the first aspect, the tank can be formed without separately preparing a jig for sandwiching. According to the third, fourth, and fifth aspects of the invention, the end cap pieces for closing the openings at both ends of the tank are provided on a single plate material forming the tank. In addition to the effect, the tank can be formed without separately manufacturing an end cap. Further, according to the invention of claim 6,
Since the baffle plate is provided with a plurality of holes and rectifying pieces, a heat exchanger that can efficiently solve the problem of hot water erosion in addition to the above-described effects can be obtained. further,
According to the invention according to claim 7, since a tank having a partition portion can be formed, a heat exchanger of a counter flow type or a heat exchanger of both tank types in which a flow path of a tube and a return flow path are made independent. Be able to apply.

[Brief description of the drawings]

FIG. 1 is a perspective view for explaining a heat exchanger according to a first embodiment of the present invention.

FIG. 2 is a partially enlarged perspective view showing a tank body according to the first embodiment.

FIG. 3 is a development view of a metal plate material for forming the tank body according to the first embodiment.

FIG. 4 is a diagram showing a processing step sequence of the tank main body according to the first embodiment.

FIG. 5 is a perspective view illustrating an end cap according to the first embodiment.

FIG. 6 is a partially enlarged perspective view showing a baffle plate portion of the tank body according to the first embodiment.

FIG. 7 is a partially enlarged perspective view showing another aspect of the baffle plate portion of the tank body according to the first embodiment.

FIG. 8 is a diagram for explaining various bending patterns of a metal plate material forming the tank main body according to the first embodiment.

FIG. 9 is a view for explaining a tank body in which an end cap according to a second embodiment is integrated.

FIG. 10 is a view for explaining a tank body in which an end cap according to a second embodiment is integrated.

FIG. 11 is a view for explaining a tank body in which an end cap according to a second embodiment is integrated.

FIG. 12 is a perspective view showing an example of a conventional heat exchanger.

FIG. 13 is a side view showing an example of a conventional heat exchanger.

FIG. 14 is a cross-sectional view of a main part showing an example of a conventional heat exchanger.

FIG. 15 is an exploded perspective view of an essential part showing an example of a conventional heat exchanger.

[Explanation of symbols]

1 flow path, 2 return flow path, 3 tubes, 40 tank body, 5A partition part, 6A to 6D tank plate part, 7A end plate part, 8 inlet pipe, 9
Outlet pipe, baffle plate part, 10b
Rectifying piece, 41 end cap, 42 side plate, 41A end cap piece.

Claims (7)

[Claims] 1. A fuel cell system comprising: a plurality of tubes stacked and arranged via fins; a tank installed at an end of each of the plurality of tubes; and an inlet pipe and an outlet pipe of a heat exchange fluid attached to the tank. In a heat exchanger, a plate material, a tank plate portion forming an outer wall of the tank, an end plate portion formed with a tube insertion hole through which an end portion of the tube is inserted, and a heat exchange fluid A baffle plate portion located at the fluid inlet of the tank is provided in order to slow the collision with the end plate portion and the inflow speed into the tube, and the tank body having the respective portions is formed by the single plate material A heat exchanger characterized by: 2. The tank is formed by providing an end cap for closing openings at both ends of the tank main body on a side plate assembled so as to sandwich a plurality of tubes and fins to be stacked from both ends in the stacking direction. Item 2. The heat exchanger according to Item 1. 3. An end cap piece for closing the opening is provided at both ends of the one plate material corresponding to the openings at both ends of the tank body, and the tank is formed by the one plate material. The heat exchanger according to claim 1, wherein the heat exchanger is formed. 4. The heat exchanger according to claim 3, wherein the end cap pieces are provided so as to extend from one side of openings at both ends of the tank body. 5. The heat exchanger according to claim 3, wherein the end cap pieces are provided so as to extend from two opposing sides of openings at both ends of the tank body. 6. A baffle plate portion, wherein a plurality of holes are formed, and each hole is provided with a straightening piece formed of a cut-and-raised piece forming each of the holes. A heat exchanger according to claim 2 or claim 3 or claim 4 or claim 5. 7. The one plate material, wherein a partition portion for partitioning a fluid inlet portion and a fluid outlet portion in the tank is provided.
A heat exchanger according to claim 4 or claim 5 or claim 6.