JPS5849514Y2 - Heat exchanger - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a heat exchanger, and particularly to an improvement in the fixed mounting structure between a tank and a seat plate through which liquid pipes are inserted.

For example, in an automobile radiator, as shown in FIG. communication,
The heat of the cooling water flowing through the liquid pipe 8 is transferred to the plate fin 9 (
Alternatively, it is released through corrugated fins 9) or the like.

In such a heat exchanger, when attaching the seat plate 3 to the flange portion 2 as shown in FIG. The tip 5a of the flange 2 and the rubber gasket 6 are sandwiched between the tip 5a and the bottom 5b.

Particularly, the one shown in FIG. 2 has a protrusion 7 on the lower surface of the flange portion 2, and the protrusion 7 presses the gasket 6 to further ensure sealing performance.

However, by bending the tip 5a of the seat plate 3, the tank 1
When holding the flange portion 2 of Although the heat exchanger is constructed using a lightweight material such as aluminum, the seat plate 3 is heavy, so that the effect of reducing the overall weight of the heat exchanger is small.

Moreover, when clamping the flange portion 2 with the seat plate 3, if the squeezing force is too strong, there is a risk that this tank 1 will be destroyed because it is made of synthetic resin, but if it is weak, the sealing performance of the gasket 6 will be ensured. This clamping work is difficult and requires great skill.

Further, as shown in FIG. 3, even in a heat exchanger in which corrugated fins 11 are interposed between flat liquid pipes 8, when the O-ring 12 is squeezed by the entire lower surface of the flange portion 2, the seat plate As long as the tip portion 5a of No. 3 is bent and tightened, the above-mentioned defects are unavoidable.

The one shown in FIG. 4 uses the seat plate 3 to directly connect the flange
The heat exchanger does not have to tighten the heat exchanger, but uses a separate caulking member 13 to tighten the heat exchanger.However, since the caulking member 13 in this heat exchanger requires considerable strength, the above-mentioned defects can be avoided. nothing is resolved.

This invention was developed to eliminate the above-mentioned defects, to enable simple and quick clamping and clamping, and to reduce the weight of the heat exchanger. In a heat exchanger in which a flange portion of a tank is press-fitted and fixed against the elastic force of an elastic sealing material fitted in advance, when the flange portion is press-fitted to a predetermined position within the gutter portion, the outer peripheral wall of the bridge portion and A recess is provided in the outer circumferential wall and the outer surface so as to form a flat groove extending over the outer surface of the flange portion and having a narrow neck in the center, and having a substantially similar external shape to the groove portion. It is an object of the present invention to provide a heat exchanger in which a bushing is fitted into the groove portion.

Hereinafter, the heat exchanger according to the present invention will be explained with reference to the drawings.

FIG. 5 shows an exploded perspective view of the heat exchanger A, and FIG. 6 is a perspective view of the main parts showing a state in which the tank and the seat plate are connected.
The same members as those shown in FIGS. 1 to 4 are given the same reference numerals.

This heat exchanger A has a flange portion 2 that projects outward from the lower end of a tank 1 whose entire horizontal cross section is approximately rectangular, and the flange portion 2 is fitted into the peripheral edge of a seat plate 3. It has a bridge portion 4.

The bridge portion 4 has a U-shaped longitudinal section so that the O-ring 12 fits therein, and the entire bridge portion 4 has a rectangular shape so that the flange portion 2 of the tank 1 fits therein.

In particular, in the present invention, the flange portion 2 of the tank 1 and the seat plate 3 are
A bushing 13 is used as a means for connecting the two.

This bushing 13 has a drum shape, and connects the tank 1 and the seat plate 3 against the elasticity of the O-ring 12 at each slope 14a-d of the drum shape.

That is, on the flange portion 2 side, a recess 16 having the same shape as the bush 13 is formed from the upper end to the lower end on the outer surface 15 of the flange portion 2, and a recess 16 having a shape similar to that of the bush 13 is formed at the lower side of the narrow neck portion 17 formed at the center of the recess 16. The recess 18 formed on the side of the seat plate 3 is fitted into the recess 18, and the bushing 13 is fitted into the flat groove created by this fitting, thereby establishing the connection between the tank 1 and the seat plate 3. It is supposed to be done.

To be more specific, when the flange portion 2 of the tank 1 is press-fitted into the bridge portion 4 of the seat plate 3 against the elastic force of the O-ring 12 that has been previously fitted into the bridge portion 4, this The O-ring 12 is pressed by the bottom surface of the flange portion 2, and gradually the flange portion 2
The sealing performance between the seat plate 3 and the seat plate 3 is improved.

When the flange portion 2 descends to a predetermined position where the sheet has sufficient properties, the slope 20 of the recess 16 on the flange portion 2 side and the slope surface 21 on the back side of the recess 18 of the seat plate 3 come into contact with each other. The position of the neck of this recess 16, the inclination angle of the recess 18, etc. are set as appropriate.

A flat groove is formed by the abutment of both the recesses 16 and 18, and when the drum-shaped bushing 13 is fitted here, the slopes 14a-d of the bushing 13 are formed on the inner surface of the groove. The tank 1 and the seat plate 3 are brought into contact with each other against the elastic force of the O tank 12.

The bushing 13 described above is formed by bending a thin plate, but it may also be punched out into an hourglass shape from a flat plate 21 as shown in FIG.

This bushing 13 has greater tensile strength than the bushes shown in FIGS. 6 and 7, and is therefore suitable for a relatively large heat exchanger.

Alternatively, as shown in FIG. 8, a continuation of a drum-shaped bulge 22 may be formed on the strip-shaped thin plate 2.

If the aforementioned connection is performed using a large number of bulges 22 in this way, this connection will become even stronger.

As is clear from the above explanation, according to the present invention, when the flange part is press-fitted into the gutter part to a predetermined position, the neck part that spans the outer circumferential wall of the bridge part and the outer surface of the flange part and whose center part is narrow is formed. A recess is provided on the outer circumferential wall and the outer surface to form a flat recessed groove, and a bushing having substantially the same shape as the recessed groove is fitted into the recessed groove portion.
There is no need to caulk or deform the seat plate itself, and since this caulking work is not required, no skill is required for manufacturing, and the yield of the product is also improved.

Furthermore, because the seat plate itself is not subjected to unreasonable force as in the past, it is also possible to construct the seat plate from a light alloy material, which has the excellent effect of reducing the weight of the entire heat exchanger. It turns out.

[Brief explanation of drawings]

Fig. 1 is a schematic front view showing a conventional heat exchanger, Figs. 2 to 4 are longitudinal sectional views showing main parts of a conventional heat exchanger, and Fig. 5 is a main part of a heat exchanger according to the present invention. FIG. 6 is a perspective view showing an assembled state of the heat exchanger, and FIGS. 7 and 8 are perspective views showing modified examples of the bushing. A... Heat exchanger, 1... Tank, 2.
...Flange part, 3...Seat plate, 4...
... Bridge section, 5 ... Outer peripheral wall, 12 ...
・O-ring, 13...button, 15...
...outer surface, 16... recess, 17...
Neck, 18... recess, 21... flat plate,
22...Bulge.

Claims (1)

[Scope of utility model registration request] 1. In a heat exchanger in which a flange portion of a tank is press-fitted and fixed against the elastic force of an elastic sealing material previously fitted into a bridge portion provided at the peripheral edge of a seat plate, the flange portion is located at a predetermined position within the bridge portion. A recess is formed in the outer circumferential wall and the outer surface so as to form a flat concave groove spanning the outer circumferential wall of the bridge portion and the outer surface of the flange portion and having a narrow neck in the center when the groove is press-fitted. A heat exchanger comprising: a bushing having a substantially similar outer shape to the groove portion; and a bushing having a substantially similar outer shape to the groove portion; 2. The heat exchanger according to claim 1, wherein the bushing is formed by punching out a flat plate or bending a thin plate. 3. The heat exchanger according to claim 1, wherein the bushing is constructed by forming a plurality of bulges having the same shape as the concave grooves on a strip-shaped thin plate.