JPH06334370A - Heat radiator and manufacture thereof - Google Patents

Abstract

PURPOSE:To widen the whole heat radiating area of a corrugate fin for improving the heat radiating efficiency by a method wherein the title heat radiator is formed of the Al-made corrugate film having bent parts closely adhering to the inner surfaces of a heating element fitting part and a connecting wall to be held between said fitting part and the connecting wall. CONSTITUTION:The title heat radiator 1 is provided with a hollow aluminum extrusion-molded member heat radiator main body 4 composed of a fin cover part 3 in almost U type sectional shape comprising a sheetlike heating element fitting part 2, a pair of opposite walls 3a integrally formed on one surface of said fitting part 2 and a connecting wall 3b integrally connecting both ends of the opposite walls 3a. At this time, a corrugate fin 8 comprising numerous flat parts 8a and bent parts 8b is contained in the heat radiator main body 4 so that the flat parts 8a may look in the same direction as that of the opposite walls 3a. Furthermore, the corrugate film 8 is held between the heating element fitting part 2 of the heat radiator main body 4 and the connecting wall 3b of the fin cover part 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiator for radiating heat generated from a heating element such as an IC in an electric vehicle.

In this specification, the term "aluminum" includes aluminum alloy in addition to pure aluminum.

[0003]

2. Description of the Related Art Conventionally, as shown in FIG. 4, as a radiator of this type, a plurality of radiation fins (21) are integrally formed in parallel in a hollow body (20) for mounting a heating element having a rectangular cross section. Aluminum extruded profiles are known. Further, as shown in FIG. 5, there is also known an extruded aluminum material in which a plurality of heat radiation fins (26) are integrally formed on one surface of a heating element mounting plate (25).

[0004]

However, since the two conventional radiators are wholly manufactured by extrusion molding, the thickness of the radiator fins (21) and (26) and the adjacent radiator fins (21) are large. It is impossible to increase the number of radiating fins (21) and (26) because the pitch between () and (26) cannot be made too small, and the height of the radiating fins (21) and (26) is too small. The heat radiation efficiency cannot be increased, and as a result, a sufficient heat radiation area cannot be obtained as a whole, resulting in poor heat radiation efficiency.

An object of the present invention is to provide a radiator and a method of manufacturing the radiator, which solves the above problems.

[0006]

A radiator according to the present invention comprises a plate-shaped heating element mounting portion, a pair of opposing walls integrally formed on one surface of the heating element mounting portion, and tip portions of the opposing walls. A heat sink body made of a hollow aluminum extruded shape member, which is composed of a fin cover part having a substantially U-shaped cross section, which is composed of connecting walls integrally connected to each other, and a heat sink composed of a plurality of flat parts and bent parts. The flat part is housed in the main body so as to face the same direction as the opposing wall of the fin cover part, and is sandwiched by the heating element mounting part and the connecting wall so that the bent part is formed on the inner surface of the heating element mounting part and the inner surface of the connecting wall. It consists of aluminum corrugated fins that are in close contact.

In the method for manufacturing a radiator according to the present invention, an aluminum corrugated fin having a plurality of flat portions and bent portions is formed, and the plate-shaped heating element mounting portion and one surface of the heating element mounting portion are integrally formed. And a fin cover part having a substantially U-shaped cross section, which is formed of a pair of opposed walls having a width larger than that of the flat part of the corrugated fin, and a connecting wall integrally connecting the tip parts of the opposed walls. Extruding the hollow heatsink body, inserting corrugated fins into the heatsink body, and deforming the opposing wall by applying pressure to the heating element mounting part and the connecting wall in the direction orthogonal to these. Thus, the corrugated fin is sandwiched between the heating element mounting portion and the connecting wall, and the bent portion is brought into close contact with the heating element mounting portion and the connecting wall.

[0008]

A horizontal cross-section U comprising a plate-shaped heating element mounting portion, a pair of opposing walls integrally formed on one surface of the heating element mounting portion, and a coupling wall integrally coupling tip portions of the opposing walls together -Shaped fin cover part made of a hollow aluminum extruded profile radiator body, and a plurality of flat parts and bent parts, and the flat part in the radiator body is the opposing wall of the fin cover part. The corrugated fin is made of aluminum and is housed so as to face the same direction. The wall thickness of the fins and the pitch between the adjacent flat portions can be arbitrarily reduced, and the width of the flat portions of the corrugated fins can be arbitrarily increased. Therefore, the heat dissipation area of the entire corrugated fin can be increased.

An aluminum corrugated fin made up of a plurality of flat portions and bent portions is formed, and a plate-shaped heating element mounting portion and a flat portion of the corrugated fin which is integrally formed on one surface of the heating element mounting portion. A hollow radiator main body composed of a pair of opposed walls having a width larger than the width and a fin cover part having a substantially U-shaped cross section which integrally connects the front end parts of the opposed walls to each other. Since the corrugated fins are inserted into the radiator main body after extrusion molding, the corrugated fins can be easily inserted into the radiator main body. Also, after inserting the corrugated fins into the radiator body, pressure is applied to the heating element mounting portion and the connecting wall in a direction orthogonal to these to deform the opposing wall, whereby the corrugated fins are connected to the heating element mounting portion and the connecting wall. Since it is attached to the wall and the bent portion is brought into close contact with the heating element mounting portion and the connecting wall, the corrugated fins can be easily fixed.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a radiator.

In FIG. 1, a radiator (1) comprises a plate-shaped heating element mounting portion (2), a pair of opposing walls (3a) integrally formed on one surface of the heating element mounting portion (2), and Radiator main body made of aluminum extruded profile having a hollow shape, which is composed of a fin cover part (3) having a substantially U-shaped cross section, which is composed of a connecting wall (3b) integrally connecting the front end parts of the facing wall (3a) (4) is provided.

Both side surfaces of the heating element mounting portion (2) of the radiator body (4) and the outer surface of the facing wall (3a) of the fin cover portion (3) are located on the same plane. Also, on the surface of the heating element mounting section (2) opposite to the side where the fin cover section (3) is formed, a screw hole for mounting the heating element (S) with the screw (5) is provided.
(6) is formed. A portion of the outer surface of the facing wall (3a) near the heating element mounting portion (2) is recessed inward. This recess is indicated by (7).

Inside the radiator body (4), there are corrugated fins (8) composed of a large number of flat portions (8a) and bent portions (8b), and the flat portions (8a) are opposite walls of the fin cover portion (3). It is stored so that it faces the same direction as (3a). Corrugated fins (8)
Is attached by the heating element mounting part (2) of the radiator body (4) and the connecting wall (3b) of the fin cover part (3), and the bent part (8b) is attached to the heating element mounting part (2). And the inner surface of the connecting wall (3b).

A method of manufacturing the above-mentioned radiator (1) will be described with reference to FIG.

First, an aluminum corrugated fin
(8) is formed, and the plate-shaped heating element mounting part (2)
A pair of opposing walls (3a) and tips of the opposing walls (3a) integrally formed on one surface of the heating element mounting portion (2) and having a width larger than the width of the flat portion (8a) of the corrugated fin (8). A hollow radiator main body composed of a fin cover part (3) having a substantially U-shaped cross section, which is composed of a connecting wall (3b) for integrally connecting the parts.
Extrude (4). Heater body (4) heating element mounting part
The width of (2) is set to be slightly larger than the width between the outer surfaces of the opposing walls (3a) of the fin cover part (3). Further, the end portion of the opposing wall (3a) on the heating element mounting portion (2) side is rounded. This rounded portion is shown by (9). Next, place the aluminum corrugated fins (8) in the radiator body (4) on the flat part.
Insert so that (8a) faces the same direction as the opposing wall (3a) of the fin cover part (3) (see FIG. 2 (a)). Then the radiator body
(4) is placed in a mold having a space having a width equal to that of the heating element mounting part (2), and the heating element mounting part (2) and the connecting wall (3
b), pressure is applied in the direction orthogonal to these, to the opposing wall (3a)
The corrugated fin (8) with the heating element mounting part (2) and the connecting wall (3b), and the bent part (8b) of the corrugated fin (8).
Is brought into close contact with the heating element mounting portion (2) and the connecting wall (3b) (see FIG. 2 (b9)) Thus, the radiator (1) is manufactured.

FIG. 3 shows another embodiment of the method of the present invention.

In FIG. 3, the bent portion (8b) of the corrugated fin (8) is provided on the inner surface of the heating element mounting portion (2) of the radiator body (4).
A plurality of recessed grooves (11) into which are fitted are formed. Others are the same as those in the above embodiment.

In the above two embodiments, the corrugated fins (8) are made of aluminum brazing sheet, and the corrugated fins (8) are brazed to the heating element mounting portion (2) and the connecting wall (3b). Good.

[0020]

As described above, according to the radiator of the present invention, the heat radiation area of the entire corrugated fin is increased, so that the heat radiation efficiency is improved.

According to the method for manufacturing a radiator of the present invention, as described above, the corrugated fins can be easily inserted into the radiator body and the corrugated fins can be easily fixed. Since it can be done, the manufacturing work is simplified.

[Brief description of drawings]

FIG. 1 is a perspective view showing a radiator of the present invention.

FIG. 2 is an enlarged cross-sectional view showing a method for manufacturing a radiator of the present invention, omitting an intermediate portion.

FIG. 3 is a partially enlarged transverse sectional view showing another embodiment of the radiator of the present invention.

FIG. 4 is a cross-sectional view showing a conventional example.

FIG. 5 is a cross-sectional view showing another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Radiator 2 Heating element mounting part 3 Fin cover part 3a Opposing wall 3b Connecting wall 4 Radiator body 8 Corrugated fin 8a Flat part 8b Bent part

Claims (2)

[Claims] 1. A cross-section comprising a plate-shaped heating element mounting portion, a pair of opposing walls integrally formed on one surface of the heating element mounting portion, and a connecting wall integrally connecting tip portions of the opposing walls. A hollow aluminum extruded heatsink main body composed of a substantially U-shaped fin cover part, and a plurality of flat parts and bent parts, and the flat part in the heatsink main part faces the fin cover part. Heat dissipation consisting of aluminum corrugated fins that are housed so that they face the same direction as the wall, and are clamped by the heating element mounting part and the connecting wall so that the bent parts are in close contact with the inner surface of the heating element mounting part and the inner surface of the connecting wall. vessel. 2. Forming an aluminum corrugated fin made up of a plurality of flat portions and bent portions, a plate-shaped heating element mounting portion, and a flat portion of the corrugated fin integrally formed on one surface of the heating element mounting portion. Hollow radiator main body composed of a pair of opposed walls having a width greater than the width of the opposed walls and a fin cover part having a substantially U-shaped cross section and integrally connecting the front end parts of the opposed walls Extruding, inserting corrugated fins into the radiator body,
In addition, pressure is applied to the heating element mounting portion and the connecting wall in a direction orthogonal to these to deform the opposing wall, whereby the corrugated fin is attached to the heating element mounting portion and the connecting wall, and the bent portion is mounted to the heating element. A method for manufacturing a radiator, wherein the radiator and the connecting wall are in close contact with each other.