JPS5823112Y2 - Heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat exchanger, particularly to an improvement in the mounting structure of a seat plate through which a liquid pipe passes and a tank provided on the seat plate.

For example, an automobile radiator has an upper tank and a lower tank (hereinafter referred to as tank 1) as shown in Figure 1.
They are communicated by a liquid pipe 8 that passes through a large number of stacked plate fins 9 or a liquid pipe 8 that holds corrugated fins 9, and the heat of the cooling water flowing through this liquid pipe 8 is released through the plate fins or corrugated fins. ing.

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

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

However, when the tip 15a of the seat plate 3 is bent to clamp the flange part 2 of the tank 1, the seat plate 3 needs to be made of a hard material (actually a steel plate) with a certain degree of strength. Even though the core part 10 consisting of the tubes 8, heat transfer fins 9, etc. is constructed using a lightweight material called aluminum, the seat plate 3 is heavy, so the effect of reducing the overall weight of the heat exchanger is small. It becomes.

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 inevitable.

The one shown in FIG. 4 uses the seat plate 3 to directly connect the flange
The heat exchanger does not have to be tightened, but a separate caulking member 13 is used 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.

The present 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 part of a tank is inserted and fixed in a part, the bridge part is inserted into a concave groove bored on the outer surface of the flange part through a through hole made in the outer circumferential wall of the bridge part, and is elastically inserted. An object of the present invention is to provide a heat exchanger in which a protrusion formed by deforming a strip having a protrusion is made to protrude.

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

Fig. 5 is a perspective view showing the main parts of the heat exchanger, and Fig. 6 is an exploded perspective view of the heat exchanger. The same reference numerals are given.

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, into which an O-ring 12 is fitted.

In particular, in the present invention, the flange portion 2 of the tank 1 and the seat plate 3 are
As a means for connecting the two, an elastic strip 16 that is fitted into a through hole 13 formed in the outer circumferential wall 5 of the bridge portion 4 and a groove 15 bored in the outer surface 14 of the flange portion 2 is deformed. It has a protrusion 17 formed by.

This strip-like piece 16 is thick enough to be completely buried in the groove 15 by pressing the protrusion 17, and after being buried, if the flange portion 2 is press-fitted into the bridge portion 4, the strip-like piece 16 The protrusion 17 protrudes from the through hole 13 due to the elasticity of the piece 16 itself.

This protrusion brings the seat plate 3 and the flange portion 2 into a connected state, and in order to break this connection, the tank 1 can be easily removed from the seat plate 3 by simply pressing the protrusion 17.

Therefore, O-ring 12 or tank 1 can be replaced very easily.

Note that this strip 16 may be made of metal such as an iron plate, but in order to reduce the weight of the entire heat exchanger, it may be made of synthetic resin, such as polyacetal, nylon 6, nylon 11, etc. It is desirable to use nylon 12, polyphenylene oxide, or the like.

Next, the action will be explained.

After the O-ring 12 is previously fitted into the bridge portion 4 of the seat plate 3, the strip 16 is buried in the groove 15 of the flange portion 2, and the resin tank 1 is press-fitted from above.

This press-fitting deforms the O-ring 12 and spreads over the bottom surface of the bridge portion 4, thereby sealing between the flange portion 2 and the seat plate 3.

Due to this press-fitting, the flange portion 2 presses the O-ring 12,
When the flange portion 2 descends within the bridge portion 4 to a position where sufficient sealing performance is obtained, the protrusion 17 protrudes from the through hole 13 due to its own elasticity, and the tank 1 and the seat plate 3 are fitted and fixed. become.

If this protrusion 17 protrudes from the through hole 13, the O-ring 12
Due to the elasticity, the upper surface of the protrusion 17 and the upper surface of the through hole 13 come into contact with each other, and the fitted and fixed state is reliably maintained.

Note that if the opening position of the through hole 13 is appropriately selected, the pressure applied to the O-ring 12 can be changed, and a desired sealing performance can be obtained.

As is clear from the above description, according to the present invention, an elastic band-shaped piece is inserted into a groove formed on the outer surface of the flange portion through a through hole formed in the outer circumferential wall of the bridge portion. Since the tank and the seat plate are fitted and fixed by protruding the protrusion formed by deformation, there is no need to caulk or deform the seat plate itself.
Therefore, since there is no caulking work, no skill is required for manufacturing, making mass production possible, and also eliminating the need for special equipment and improving product yields.

Furthermore, since the seat plate itself is not subjected to excessive force as in the conventional case, the seat plate can be made of a light alloy material, and the weight of the entire heat exchanger can also be reduced.

Further, since the engagement between the tank and the seat plate can be released simply by pressing the protrusion, extremely excellent effects such as easy replacement of the tank or the O-ring can be achieved.

[Brief explanation of the drawing]

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 an exploded perspective view of the main parts of the heat exchanger. A... Heat exchanger, 1... Tank, 2.
...Flange part, 3...Seat plate, 4...
... Bridge section, 5 ... Outer peripheral wall, 12 ...
・0 ring, 13... through hole, 14...
Outer surface, 15... Concave groove, 16... Strip piece, 17... Protrusion.

Claims (1)

[Scope of utility model registration request] In a heat exchanger in which a flange part of a tank is inserted and fixed into a gutter part provided at the peripheral edge of a seat plate, a hole is drilled in the outer surface of the flange part from a through hole made in the outer circumferential wall of the bridge part of the tank. A heat exchanger in which a protrusion is made to protrude by deforming an elastic band-shaped piece that is fitted into a groove.