JPS5842793Y2 - Heat exchanger - Google Patents

Description

[Detailed description of the invention] This invention is a heat exchanger for cooling internal combustion engines such as automobiles, particularly a tubeless type heat exchanger, that is, a heat exchanger in which a liquid passage tube is provided in a fin member to allow a coolant to flow through the heat exchanger. The present invention relates to an improvement in the joint structure between a seat plate and a tank in a heat exchanger which is formed by stacking a large number of short cylindrical opening protrusions.

The recently developed tubeless type heat exchanger is the first
As shown in the figure and FIG. 2, by laminating and joining a plurality of fin members 2 each having a plurality of short cylindrical opening protrusions 1 squeezed out, the short cylindrical opening protrusions 1 are continuously formed. A core part 4 is configured to form a liquid passage part 3, and a short cylindrical opening protrusion 5 is formed at both upper and lower ends of the core part 4, similar to the short cylindrical opening protrusion 1 of the fin member 2. seat plate 6,
7 and further, tanks 8 and 9 molded from synthetic resin are joined to the seat plates 6 and 7 for the purpose of reducing the weight of the heat exchanger and improving the working environment.

When joining the resin tanks 8 and 9 to the seat plates 6 and 7, as shown in detail in FIG. The gasket 11 and the mounting flange portion 12 of the tank 8 are inserted into the groove 10 and fixed by a caulking member 13, or by caulking directly at the edge of the seat plate 6. It had been taken.

However, according to the above-described joining means, (1) the gasket groove is formed in the seat plate by bending, so the thickness of the seat plate cannot be made very thick.

(2) Since the thickness of the seat plate cannot be increased, the height hl of the short cylindrical opening protrusion 5 formed on the seat plate cannot be increased.

(3) Height hl of the short cylindrical opening protrusion 5 formed on the seat plate
is low, the fitting area of the joint between the fin member and the seat plate is small, and the joint strength thereof is low.

(4) In order to avoid interference between the end of the fin member joined to the seat plate and the gasket groove formed on the seat plate, the length l of the projecting portion from the end of the fin member becomes larger than necessary.

(5) The effective core height H of the core portion is reduced by the height of the gasket groove.

It had the following drawbacks.

Therefore, the purpose of this invention is to improve the joint structure between the seat plate and the resin tank of a tubeless type heat exchanger, thereby eliminating the various drawbacks mentioned above.

Hereinafter, the structure of the heat exchanger according to the invention of this application will be explained along with the embodiments shown in FIGS. 3 to 5.

Similarly to the heat exchanger shown in FIG. 2, the heat exchanger shown in FIG. The core portion 24 is configured such that the short cylindrical opening protrusions 21 continuously form the liquid passage pipe 23.

A seat plate 26 in which a short cylindrical opening protrusion 25 having the same taper angle as the short cylindrical opening protrusion 21 of the fin member 22 is formed at both upper and lower ends of the core portion 24 configured as described above.
, 27 fit the short cylindrical opening protrusion 25 into the liquid passage pipe 23 in the core part 24, and the two are joined by adhesive or brazing.

The heat exchanger is completed by joining the synthetic resin tanks 28 and 29 to the upper and lower seat plates 26 and 27, but in the heat exchanger of this invention, the seats are Leave the edge of the plate 26.27 flat, and integrally attach the groove 34.35 for inserting the gasket 32.33 to the mounting flange 30.31 provided on the edge of the tank 28.29. Mounting flange parts 30.31 made of resin and inserted with flat plate-like edges of the seat plates 26.27 and gaskets 32.33 of the tanks 28.29.
It is characterized in that it is crimped and fixed by a crimping member 36, 37 made of a two-split member, or a crimping member having a U-shaped cross section and a rectangular frame shape having a notch in a part.

Note that when joining the seat plates 26, 27 and the tanks 28, 29, the joint surfaces do not have gasket grooves 10 at the edges of the seat plate 6, as shown in FIG. Therefore, positioning the seat plate and the tank becomes difficult.

For this reason, as shown in FIGS. 4 and 5, the upper tank 2
A plurality of plate-like engaging pieces 38, 38 are provided on the peripheral edge of the mounting flange portion 30 of No. 8, and a plurality of plate-shaped engagement pieces 38, 38 are provided on the peripheral edge of the upper seat plate 26, and a plurality of engagement pieces 38, 38 are provided on the peripheral edge of the upper seat plate 26. 39.39 outwardly open notches 39.39 are formed.

Thereby, when joining the seat plate 26 and the tank 28, by fitting the engagement piece 38 into the notch 39, the seat plate 26
and the tank 28 is accurately positioned at a predetermined position.

Although the upper seat plate 26 and the upper tank 28 have been described above, the lower seat plate 27 and the lower tank 29 are also positioned in the same manner.

Further, in the embodiment shown in FIGS. 3 and 4, the upper tank 28 is provided with inflow and outflow pipes 40, 41, and a partition wall 42 is provided diagonally across the center of the pipe, so that the cooling liquid is sent from the inflow pipe 40 to one chamber 28 a of the upper tank 28 , passes through the liquid passage pipe 23 of the core section 24 , is cooled, flows to the lower tank 29 , and then flows from the lower tank 29 again to the passage of the core section 24 . The liquid passes through the pipe 23, is cooled, is led to the other chamber 28b of the upper tank 28, and is then led to the outflow pipe 4.
It is discharged from 1.

In this way, the inside of the upper tank 28 is divided into two chambers 28a on the left and right,
28b and collect the inflow pipe 40 and outflow pipe 41 in the upper tank 28, the liquid passage pipe 2 in the core part
3 increases the flow rate of the cooling water, which not only improves the efficiency of the heat exchanger, but also allows the height of the heat exchanger as a whole to be kept low, which has the advantage of being easy to install in narrow spaces. .

However, the present invention is not limited to heat exchangers that have an inflow pipe and an outflow pipe assembled in one tank, but can also be applied to heat exchangers that have one pipe each in the upper and lower tanks, as shown in Figure 1. Of course it can be done.

In the heat exchanger of this invention constructed as described above, when joining the seat plate 26.27 and the tank 28.29,
The edges of the seat plates 26 and 27 can remain flat by simply forming the gasket grooves 34 and 35 integrally on the tank 28 and 29 sides, so the thickness of the seat plates 26 and 27 can be made as thick as necessary. As a result, the rigidity of the sealing surface can be increased, and deep drawing can be performed when forming the short cylindrical opening protrusions 25 on the seat plates 26 and 27, so that the height h2 of the protrusions 25 can be reduced. can be made sufficiently high, and accordingly, the fitting area between the fin member 22 and the seat plates 26 and 27 can be made sufficiently large, and the joint strength can be increased.

Furthermore, since there is no obstructive protrusion below the joint, there is no need to take the length l of the protrusion as shown in FIG. 2, and the effective height of the core part 24 is not obstructed in any way. It comes to have various advantages.

Further, the seat plates 26 and 27 can be made of a thick material, and the edges thereof can remain flat, so that the moldability of the seat plates is improved and productivity can be improved.

Furthermore, retaining pieces 3 are attached to the seat plates 26 and 27 and the tanks 28 and 29.
8 or notch 39, it is possible to easily and accurately position them when joining them.

[Brief explanation of the drawings] Figure 1 is a front view of a conventional heat exchanger, Figure 2 is a partially enlarged perspective view showing the joint structure between the seat plate and the tank, etc., and Figure 3 is a front view of a conventional heat exchanger. The figure is a partially enlarged perspective view of the heat exchanger of this application, FIG. 4 is a front view of the tank, and FIG. 5 is a plan view of the seat plate. 21: Short cylindrical opening protrusion, 22: Fin member, 23: Liquid pipe, 24: Core part, 26. 27: (Upper, lower) seat plate, 28. 29: (Upper, lower) tank, 30. 31: Flange part, 32.33: Gasket, 34.35: (
(for gasket) groove, 36.37: caulking member, 38
: Engagement piece, 39: Notch.

Claims (1)

[Scope of utility model registration request] Seating plates 26 and 27 are respectively provided at both ends of a core portion 24 in which a plurality of fin members 22 each having a plurality of short cylindrical opening protrusions 21 are laminated and bonded to form a liquid passage pipe. In a tubeless type heat exchanger in which a resin tank 8.9 is bonded to each seat plate, the seat plate 26.2 is
7 is formed into a flat plate shape, and a plurality of notches 39 are formed outwardly. The annular groove 34 is integrally molded with resin to form an endless gasket (32.33), and a plate-like piece is inserted into the notch 39 of the seat plate to align the position of the seat plate and the tank. The joint piece 38 is made to protrude downward to form a shape, and the seat plate 26 is
, 27 and mounting flange portions 30 and 31 of the tank stacked thereon, each of which is crimped and fixed by a crimping member 13.