JPH10176894A - Heat-exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately hold a position relation between a side plate and a tank and to improve brazing ability by a method wherein a protrusion is formed on one of the end face of a tank for a heat-exchanger used in an air- conditioning device for a vehicle and a surface on the tank side and a recessed part or a hole in the other, and the protrusion and the recessed part or the hole are engaged with each other. SOLUTION: A heat-exchanger has a plurality of elements 4 communicated with tanks 2 and 3 and a corrugated fin 5 is arranged between the tube elements 4. A core part 6 comprises the alternately laminated tube elements 4, the fin 5, and side plates 7 arranged at the two ends of a laminate part. In this case, end faces 13-16 of the tanks 2 and 3 are formed in a flat surface, a hole 17 is formed in the flat surface and meanwhile, a surface 18 on the tank side of the side plate 7 is also formed in a flat surface, and a protrusion 19 joined with the hole 17 is formed on the flat surface. This constitution accurately holds a position relation between the tanks 2 and 3 and the core part, and improves brazing ability of the heat-exchanger.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger used for a vehicle air conditioner and the like, and more particularly to a joint structure between a tank and a side plate.

[0002]

2. Description of the Related Art A heat exchanger having a core portion in which, for example, tube elements and fins are alternately stacked is well known. In such a heat exchanger, when joining each member, a method of heating and brazing in a furnace in a state where the core portion of the heat exchanger is temporarily assembled (that is, an assembled state) is adopted. I have. And
As a means for maintaining the shape of the temporarily assembled heat exchanger during the brazing process, a method of fixing and brazing the heat exchanger using, for example, a jig as shown in FIG. 1 has already been adopted. FIG. 1 is also used in the following description of the present invention. In FIG. 1, reference numeral 1 denotes a heat exchanger. The heat exchanger 1 has tanks 2 and 3 and a plurality of tube elements 4 communicating with the tanks 2 and 3 and having a flow path formed therein. Fins 5 are provided between the tube elements 4. The core portion 6 is formed by the tube elements 4 and the fins 5 which are alternately stacked, and the side plates 7 provided at both ends of the stacked portion.

[0003] Brazing is performed by fixing the assembly of the core portion 6 of the temporarily assembled heat exchanger 1 with jigs 10 from both ends in the laminating direction.

[0004] The jig 10 includes a horizontal jig 11 and a fastening jig 1.
2 and the temporarily assembled heat exchanger 1
A horizontal jig 11 extending along both ends of the core portion 6, and a jig 12 having a substantially U-shaped cross section for holding and fixing the horizontal jig 11 from both sides.
And heated and brazed in a furnace. That is, by applying an appropriate stress (fixing force) to the core 6 from the direction indicated by the arrow in FIG. 1, the shape of the core 6 is maintained.

In the above method, the temporarily assembled heat exchanger 1 can be fixed, heated and brazed accurately and accurately by the jig 10, so that the brazing property can be improved. it can. In addition, since the jig 10 has a simple structure, it has an advantage that its manufacture and attachment / detachment to the heat exchanger 1 are easy.

[0006]

However, in the above method, it is possible to maintain the shape of the core portion 6, but it is difficult to maintain the positional relationship between the core portion 6 and the tanks 2, 3. There are cases. For this reason, for example, as shown in FIG.
May incline, leading to poor brazing. The poor brazing may cause a decrease in the pressure resistance of the heat exchanger 1 and the like. In order to solve this problem, a method of inserting and fixing an end of the side plate into a groove or the like provided in a seat plate of the tank (for example, JP-A-4-270895,
WO95 / 08089) has also been proposed, but in these proposals, there is a possibility that the structure becomes complicated and the assembling work efficiency is reduced. Further, a press die for producing the side plate and the seat plate may be complicated.

SUMMARY OF THE INVENTION An object of the present invention is to improve the brazing properties of a temporarily assembled heat exchanger, particularly a side plate and a tank, and furthermore, a positional relationship between a core portion and a tank, which has a simple structure. Accordingly, it is an object of the present invention to provide a high-quality heat exchanger excellent in pressure resistance and the like.

[0008]

Means for Solving the Problems In order to solve the above-mentioned problems, a heat exchanger according to the present invention comprises a heat exchanger having a structure in which a tank and a side plate are joined together. A projection is provided on one of the surfaces, and a recess or hole is provided on the other surface, and the projection and the recess or hole are engaged with each other.

[0009] The projection and the recess or hole are each
It is desirable that a plurality of tanks be provided for the end face of one tank and the tank-side face of the side plate.

The shapes of the above-mentioned projections, concave portions or holes are not particularly limited. For example, those having a substantially circular, elliptical or square planar shape can be adopted.

It is desirable that the end face of the tank and the side face of the side plate on the tank side to be joined to each other are formed to be flat. When a flat surface is formed on both members, it is desirable to provide a projection and a concave portion or a hole on the flat surface.

In the above heat exchanger, one member is provided with a projection, and the other member is provided with a recess or a hole which engages with the projection, so that the heat exchanger is temporarily assembled. Just the protrusions and recesses or holes engage each other,
The tank and the side plate can be temporarily and simply and accurately fixed in a predetermined positional relationship. Therefore, the inclination of the tank in the temporarily assembled state is prevented, and the positional relationship between the tank and the side plate, and furthermore, the tank and the core portion is accurately maintained, and the brazing property is improved. Further, the above-mentioned projections, recesses or holes can be formed simultaneously and integrally when the tank or the side plate is formed by, for example, a press or the like, so that an increase in cost can be effectively suppressed.

Further, in the heat exchanger according to the present invention,
The shape of the heat exchanger can be maintained in each of the steps before brazing, during heating, and cooling after heating. In the present invention, the “brazing step” includes the above steps.

[0014] The projection and the recess or hole are respectively
If a plurality of tanks are provided with respect to the end face of one tank and the tank-side surface of the side plate, the side plate and the tank are engaged at two or more points, so that the inclination of the tank with respect to the side plate is further ensured. Can be prevented.

The shapes of the projections, recesses, or holes are not particularly limited, but the plane shapes thereof can be substantially circular, oval, square, and the like. In particular, if an oval or square shape is adopted, it is possible to reliably prevent the tank from tilting by simply providing one projection, recess, or hole on the end face of one tank and the tank-side surface of the side plate. Becomes

Further, if the end face of the tank and the side face of the side plate on the tank side which are joined to each other are formed as flat surfaces, and the flat surfaces are provided with projections and recesses or holes, the two flat surfaces are accurately butted against each other. At the same time, the tank and the side plate can be easily and securely engaged.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the heat exchanger of the present invention will be described below with reference to the drawings. 1 to 4 show a heat exchanger 1 according to a first embodiment of the present invention. In the figure, reference numeral 1 denotes a heat exchanger. The heat exchanger 1 has tanks 2 and 3 and a plurality of tube elements 4 communicating with the tanks 2 and 3.
Corrugated fins 5 are provided between the tube elements 4. The core portion 6 is formed by the tube elements 4 and the fins 5 which are alternately stacked, and the side plates 7 provided at both ends of the stacked portion. The inside of the tank 2 is divided into two chambers by a partition plate (not shown). The tank 2 has a heat exchanger 1
An inlet pipe 8 and an outlet pipe 9 for introducing and leading a fluid (for example, a refrigerant) into the inside are connected.

1 and 2, the heat exchanger 1
Shows a state in which it is fixed by the brazing jig 10. The jig 10 includes a horizontal jig 11 extending along the end of the core portion 6 and a fastening jig 12 for holding and fixing the horizontal jig 11 from both sides. In the present embodiment, the horizontal jig 11 is a rod-shaped member, and the fastening jig 1
2 is a member having a substantially U-shaped cross section as shown in FIG. Then, the heat exchanger 1 is temporarily assembled (assembled state).
After that, it is fixed by a jig 10 and brazed in a furnace.

The end surfaces 13, 14, 15, 1 of the tanks 2, 3
6 is formed as a flat surface, and a hole 17 is formed in the flat surface.
Is provided. Further, the tank-side surface 18 of the side plate 7 is also formed as a flat surface, and the flat surface is provided with a projection 19 that is joined to the hole 17. In the present embodiment, the projection 19 is formed integrally with the side plate 7, but may be formed by joining another member to the side plate 7. In the present embodiment, one end face 13, 14, 15, 16
, A plurality of (two) holes 17 are provided, and a corresponding plurality of (two) projections 19 are provided on the surface 18 on the tank side. Further, the plane shapes of the hole 17 and the projection 19 are substantially circular.

In this embodiment, holes 17 are provided in the end faces 13, 14, 15, 16 of the tanks 2, 3, and protrusions 19 which engage with the holes 17 are formed in the tank-side surface 18 of the side plate 7. Is provided, the tanks 2 and 3 and the side plate 7 can be easily and reliably engaged simply by temporarily assembling the heat exchanger 1. Accordingly, the positional relationship between the tanks 2 and 3 and the side plate 7 in the temporarily assembled state, that is, the positional relationship between the tanks 2 and 3 and the core 6 can be accurately maintained, and the brazing property of the heat exchanger 1 can be improved. it can.

The end surfaces 13, 14, 1 of the tanks 2, 3
5 and 16 are formed on a flat surface, the hole 17 is formed on the flat surface, and the tank-side surface 18 of the side plate 7 is formed on a flat surface, and the projection 19 is formed on the flat surface. Since it can be performed simultaneously in the process of processing the tanks 2 and 3 and the side plate 7 by press molding, cost increase can be effectively suppressed.

In the present embodiment, a plurality of holes 17 are provided for one end face 13, 14, 15, and 16,
Since a plurality of projections 19 are provided on the tank-side surface 18, the tanks 2, 3 and the side plate 7 have a plurality of points (2
), The side plates 7
Can be prevented more reliably.

In the present embodiment, the plane shapes of the hole 17 and the projection 19 are substantially circular, but the present invention is not limited to this. For example, an oblong shape as shown in FIG. It can also be formed in a rectangular shape as shown in FIG. When the plane shape of the hole 17 and the projection 19 is an ellipse or a square, even if the engagement between one hole 17 and the projection 19, that is, the engagement at only one point, is determined by the shape of the hole and the projection. Since the inclination of the tanks 2 and 3 can be reliably prevented, one of the end faces 13, 14, 15,
It is also possible to adopt a mode in which holes 17 are formed one by one in 16 and one projection 19 corresponding to the tank-side surface 18 of the side plate 7 is formed.

FIG. 7 shows a heat exchanger 1 according to a second embodiment of the present invention. In this embodiment, the end faces 13, 14, 15, 16 of the tanks 2, 3 are provided with concave portions 20 which engage with the projections 19 of the side plate 7. In the present embodiment, one end face 13, 1
A plurality of recesses 20 are provided on 4, 15, and 16, and a plurality of projections 19 are provided on a surface 18 on the tank side. Further, the planar shape of the projection 19 and the concave portion 20 is circular.

Also in this embodiment, the inclination of the tanks 2 and 3 during the brazing process of the heat exchanger 1 can be reliably prevented by the same operation as the first embodiment, so that the brazing property is improved. Can be improved. Further, the planar shape of the projection 19 and the concave portion 20 may be an ellipse or a square. In this case, the inclination of the tanks 2 and 3 is reliably prevented only by the engagement between the single projection 19 and the concave portion 20. Therefore, a mode in which one projection 19 or one concave portion 20 is formed on each surface can be adopted.

FIG. 8 shows a heat exchanger 1 according to a third embodiment of the present invention. In the present embodiment, projections 22 are provided on the end faces 13, 14, 15, 16 of the tanks 2, 3 to engage with recesses 21 provided on the tank-side surface 18 of the side plate 7. Further, in the present embodiment, the end faces 13, 14, 15,
A plurality of projections 22 are provided on 16, and a plurality of recesses 21 are provided on the tank-side surface 18 of the side plate 7. Further, the planar shapes of the concave portion 21 and the projection 22 are circular.

Also in the present embodiment, since the inclination of the tanks 2 and 3 during the brazing process of the heat exchanger 1 can be reliably prevented, the brazing property can be improved. Further, the planar shape of the concave portion 21 and the protrusion 22 may be an oval or a square, and in this case, one concave portion 21
The inclination of the tanks 2 and 3 can be prevented only by the engagement of the protrusions 22 with the recesses 21 or the protrusions 2 on each surface.
2 may be adopted.

FIG. 9 shows a heat exchanger 1 according to a fourth embodiment of the present invention. In this embodiment, the projections 22 are provided on the end faces 13, 14, 15, 16 of the tanks 2, 3, and the holes 18 for engaging with the projections 22 are provided on the tank-side surface 18 of the side plate 7. I have. Further, in the present embodiment, the end faces 13, 1 of one tank 2, 3 are arranged.
A plurality of projections 22 are provided on 4, 15, and 16, and a plurality of holes 23 are provided on the tank-side surface 18 of the side plate 7. Further, the planar shapes of the projection 22 and the hole 23 are circular.

Also in this embodiment, the inclination of the tanks 2 and 3 during the brazing process of the heat exchanger 1 can be reliably prevented. The planar shape of the projection 22 and the hole 23 may be an oval or a square. In this case, the inclination of the tanks 2 and 3 can be prevented only by the engagement of the single projection 22 and the hole 23. .

[0030]

As described above, when the heat exchanger of the present invention is used, the inclination of the tank with respect to the side plate during the brazing process, and hence the inclination of the tank with respect to the core portion, etc., can be ensured with a simple structure. Since it can be prevented, the brazing property is improved, and a high-quality heat exchanger can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view showing a state in which a heat exchanger according to one embodiment of the present invention is fixed to a jig.

FIG. 2 is a cross-sectional view of the heat exchanger and the jig of FIG. 1 taken along the line II-II.

FIG. 3 is an enlarged partial exploded perspective view of the heat exchanger of FIG.

FIG. 4 is a partial cross-sectional view of the heat exchanger of FIG.

FIG. 5 is an exploded perspective view showing a modified example of the protrusions and the recesses or holes of the heat exchanger of FIG. 2;

FIG. 6 is an exploded perspective view showing another modification of the protrusions and the recesses or holes of the heat exchanger of FIG. 2;

FIG. 7 is a partial sectional view of a heat exchanger according to a second embodiment of the present invention.

FIG. 8 is a partial cross-sectional view of a heat exchanger according to a third embodiment of the present invention.

FIG. 9 is a partial sectional view of a heat exchanger according to a fourth embodiment of the present invention.

FIG. 10 is a partial sectional view of a conventional heat exchanger.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat exchanger 2, 3 Tank 4 Tube element 5 Fin 6 Core part 7 Side plate 8 Introducing pipe 9 Outgoing pipe 10 Jig 11 Horizontal jig 12 Tightening jig 13, 14, 15, 16 End face 17, 23 Hole 18 Tank Side surface 19,22 Projection 20,21 Recess

Claims (6)

[Claims] 1. A heat exchanger having a joint structure between a tank and a side plate, wherein a protrusion is provided on one of an end surface of the tank and a tank-side surface of the side plate, and a recess or a hole is provided on the other, and the protrusion and the recess are provided. Or a heat exchanger characterized by engaging holes with each other. 2. The heat exchanger according to claim 1, wherein a plurality of the protrusions and the plurality of recesses or holes are provided for an end surface of one tank and a tank-side surface of a side plate, respectively. 3. The heat exchanger according to claim 1, wherein the projection and the recess or the hole have a substantially circular planar shape. 4. The heat exchanger according to claim 1, wherein the projection and the recess or the hole have a substantially oval planar shape. 5. The heat exchanger according to claim 1, wherein the projection and the recess or the hole have a substantially square planar shape. 6. An end face of the tank and a tank-side face of the side plate which are joined to each other are formed on a flat face, and the flat face is provided with the projection and the concave portion or the hole.
The heat exchanger according to claim 1.