JPH08172150A - Radiator - Google Patents

Abstract

PURPOSE: To reduce manufacturing cost, increase radiation area, reduce size and weight, and improve radiation performance, by constituting a radiation fin of a plurality of corrugate members which are formed by bending a plate and stacked in a lamination type. CONSTITUTION: A radiation fin 3 is formed on one surface of a main body 2 wherein a heating element fixing part is formed on the other surface. In such a radiator 1, the radiation fin 3 consists of a plurality of corrugate members 5 which are formed by bending a plate and stacked in a lamination type, on the one surface side of the main body 2. The wavy bottom parts 5a of the higher corrugate members 5 are placed on the wavy top parts 5b of the lower corrugate members 5b. For example, the corrugate members 5 are formed by bending an Al plate, and the wavy bottom parts 5a of the upper corrugate members 5 are placed on the wavy top parts 5b of the lower corrugate members 5, and soldered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiator, and more specifically, a radiator fin is provided on the other surface side of a main body having a heating element mounting portion on one surface, and the radiator fin is mounted on the heating element mounting portion. For example, the present invention relates to a radiator for radiating heat from a heating element such as a semiconductor element such as a transistor or a thyristor.

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

[0003]

2. Description of the Related Art Conventionally, as this kind of radiator, a plurality of radiating fins made of aluminum extruded shape and having a fin shape and a partition plate interposed between the adjacent fin members. It is known that it is composed of (see Japanese Patent Publication No. 3-26545).

[0004]

However, in the conventional radiator, since the grid-shaped fin member constituting the radiation fin is made of aluminum extruded profile, its manufacturing cost is high, and consequently the manufacturing cost of the radiator as a whole. Becomes higher. In addition, since the lattice fin member is made of extruded aluminum, it is not possible to reduce the distance between the vertical portions that form the lattice and the distance between the horizontal portions that form the lattice to a certain amount or more. The area is insufficient. Moreover, it is necessary to increase the size in order to obtain a predetermined heat radiation area. Further, since the lattice-shaped fin member is made of extruded aluminum, the wall thickness of the vertical and horizontal portions forming the lattice cannot be reduced to a certain thickness or more, and the weight becomes large. Furthermore, since the partition plate is interposed between the adjacent grid-shaped fin members, the weight is increased and the material cost is increased.

An object of the present invention is to provide a radiator that solves the above problems.

[0006]

According to another aspect of the present invention, there is provided a radiator in which a heat-dissipating fin is provided on the other surface of a main body having a heating element mounting portion on one surface thereof. A corrugated fin member that is formed by stacking the corrugated fin members on the other surface side of the main body in a laminated manner, and the corrugated fin portion of the upper corrugated fin member is above the corrugated head portion of the lower corrugated fin member. It is listed in.

[0007]

Since the corrugated fin member forming the heat radiation fin is formed by bending the plate, its manufacturing cost is reduced. Further, since the corrugated fin member is formed by bending the plate, the distance between the wall portions connecting the corrugated fin portion and the corrugated head portion in the corrugated fin member, and the corrugated bottom portion and corrugated portion in the wall portion. The width in the direction of connecting can be changed appropriately. Further, since the corrugated fin member is formed by bending the plate, the wall thickness can be arbitrarily reduced. In addition, since the corrugated bottom of the upper corrugated fin member is placed on the corrugated top of the lower corrugated fin member, it is between the corrugated top of the upper fin member and the corrugated bottom of the lower fin member. When the space formed is large and cooling air is applied to the radiation fins by a blower, if a part of the space is within the range of the cooling air, the cooling air will flow through the entire space. . Furthermore, since the corrugated bottom of the upper corrugated fin member is placed on the corrugated head of the lower corrugated fin member, no partition plate is required between the adjacent fin members.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. Throughout the drawings, the same components and parts will be denoted by the same reference symbols, without redundant description.

In FIG. 1, the radiator (1) is provided on the upper surface of the main body (2) with a rectangular horizontal plate-shaped main body (2) made of aluminum having a heating element mounting portion for mounting the heating element (S) on the lower surface. The heat radiation fins (3) and the aluminum brazing sheet cover (4) that covers the upper sides of the heat radiation fins (3).

The radiating fins (3) are a plurality of aluminum corrugated fin members which are stacked one on top of the other.
It is composed of (5). Corrugated fin member
(5) is formed by bending an aluminum plate, and the flat wall portions (5c) parallel to each other that connect the flat wave bottom portion (5a) and the flat wave top portion (5b) are arranged vertically. ing. The corrugated bottom (5a) of the upper corrugated fin member (5) is the corrugated head (5a) of the lower corrugated fin member (5).
b) Mounted on and brazed. Fin member at the bottom
The wave bottom (5a) of (5) is brazed to the body (2). The corrugated portion (5b) of the fin member (5) at the upper end is brazed to the cover (4). Then, between the vertically adjacent fin members (5), the wave crest (5b) of the upper fin member (5), the wave bottom (5a) of the lower fin member (5), and both fin members ( By the flat wall part (5c) of 5), the height of the fin member (5) is 2
A plurality of spaces (7) having double the height are formed. In addition, a plurality of spaces (8) having a height equal to that of the fin member (5) are formed by the wave head (5b) and the flat wall portion (5c) of the fin member (5) at the lower end and the main body (2). Are formed. Further, the wave bottom (5a) and the flat wall portion (5c) of the fin member (5) at the upper end and the cover (4) form a plurality of spaces (9) having a height equal to that of the fin member (5). Has been formed.

The radiator (1) is, as shown in FIG.
(2), brazing filler metal (6), corrugated fin member
(5) and cover made of aluminum brazing sheet
It is manufactured by combining (4) and brazing these together. Between the corrugated bottom (5a) of the upper fin member (5) and the corrugated head (5b) of the lower fin member (5) in the sheet-shaped brazing filler metal (6) existing between the adjacent fin members (5). The part that is not present melts and flows off during brazing. According to this method, since the adjacent fin members (5) are brazed to each other via the sheet-shaped brazing material (6), the fin member (5) can be easily laminated during manufacturing.

The corrugated fin member (5) may be formed of an aluminum brazing sheet.
In this case, when manufacturing the radiator (1),
The need for (6) is eliminated and the cover (4) need not be formed of an aluminum brazing sheet.

In such a radiator (1), the radiator
An air blower (F) is arranged behind (1) (on the back side of the drawing), and the cooling air sent by the air blower (F) hits the heat radiation fins (3) within the range shown by the chain line A in FIG. At this time, the space shown by (7A) is only partly within the above range, but the cooling air will flow through the entire space (7A), improving the heat dissipation performance.

3 and 4 show another embodiment of the present invention.

In FIG. 3, the radiator (10) is a radiation fin.
It is equipped with an aluminum brazing sheet cover (11) that covers the upper side and both left and right sides of (3). The cover (11) is brazed to the upper and left and right ends of the heat dissipation fin (3).

As shown in FIG. 4, circular through holes (12) are formed in the corrugated fin member (5) of the radiator (10) at the corrugated bottom portion (5a), corrugated head portion (5b) and flat wall portion (5c), respectively. ) Is formed. Therefore, all spaces (7) (7A) (8) (9) are in communication.

This radiator (10) is also the radiator (1) of the above embodiment.
It is manufactured by the same method as.

According to this radiator (10), when cooling air is applied to the radiation fins (3) by the blower (F), the cooling air is directly contacted with the spaces (7) (7A) (8) (9). ) Inside, and the space (7) (8) (9) of the part that does not directly hit through the through hole (12)
It also flows in and flows through it. Therefore, the cooling air comes into contact with all parts of the radiation fin (3),
The heat dissipation performance is improved.

FIG. 5 shows a modification of the corrugated fin member (5) used in the radiator of the other embodiment described above.

In FIG. 5, a corrugated fin member
From one flat wall portion (5c) of (5) to the wave bottom portion (5a), the adjacent flat wall portion (5c), and the wave head (5b), to the next adjacent flat wall portion (5c).
The slits (13) leading to c) are formed in a staggered arrangement. Therefore, all the space in the radiating fin (3)
(7) (7A) (8) (9) are communicated.

[0021]

According to the radiator of the present invention, as described above, the manufacturing cost of the corrugated fin member constituting the radiating fin is reduced, so that the manufacturing cost of the entire radiator is also reduced. Further, since the distance between the wall portions connecting the wave bottom and the wave head in the corrugated fin member and the width in the direction connecting the wave bottom and the wave head in the wall portion can be appropriately changed, the heat radiation area can be reduced. It can be made larger than the conventional one. Moreover, when the same heat radiation area is obtained, the size can be made smaller than the conventional one. Further, since the corrugated fin member can be arbitrarily thinned and a partition plate is not required, the weight can be reduced and the cost can be reduced as compared with the conventional one. Furthermore, since the corrugated bottom of the upper corrugated fin member is placed on the corrugated top of the lower corrugated fin member, it is between the corrugated top of the upper fin member and the corrugated bottom of the lower fin member. When the space formed is large and cooling air is applied to the radiation fins by a blower, if part of the space is within the range of the cooling air, the cooling air will flow through the entire space. ,
The heat dissipation performance is improved.

[Brief description of drawings]

FIG. 1 is a front view showing a radiator according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a method of manufacturing the radiator of the embodiment.

FIG. 3 is a front view showing another embodiment of the present invention.

FIG. 4 is a perspective view showing a part of a fin member of a radiator of another embodiment.

FIG. 5 is a perspective view showing a part of a modified example of a fin member of a radiator of another embodiment.

[Explanation of symbols]

 (1) Heat sink (2) Main body (3) Radiating fin (5) Corrugated fin member (5a) Wave bottom (5b) Wave head

Claims (1)

[Claims] 1. A radiator in which a heat radiation fin is provided on the other surface side of the main body having a heating element mounting portion provided on one surface, wherein the heat radiation fin is formed by bending a plate, and the other surface of the main body A radiator comprising a plurality of corrugated fin members stacked side by side, wherein the wave bottom of the upper corrugated fin member is placed on the wave head of the lower corrugated fin member.