JPH11317588A - Aluminum alloy heat radiator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an aluminum alloy heat radiator, which can be easily manufactured without using a special pressure jig and enhanced in heat dissipating capacity, wherein the aluminum alloy heat radiator is formed of corrugated fins and separator sheets which are alternately and easily laminated and bonded together by brazing. SOLUTION: Corrugated fins 2 and separator sheets 3 are laminated alternately and bonded together through brazing into an aluminum alloy heat radiator. In this case, the corrugated fins 2 and the separator sheets 3 are alternately laminated inside an extruded aluminum alloy material 1 square or U-shaped in cross section and bonded together through brazing, in which either of the corrugated fin 2 and the separator sheet 3 is formed of a brazing sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiator made of aluminum alloy for cooling electronic equipment parts.

[0002]

2. Description of the Related Art Electronic device components such as transistors,
In general, thyristors are cooled by natural air cooling or forced air cooling using a fan.However, the material of the radiator used here has good heat conductivity, In many cases, it is an inexpensive aluminum alloy.

As a configuration of a radiator using such an aluminum alloy, there is a conventional configuration shown in FIGS. 5 and 6, for example. FIG. 5 shows an extruded profile having a comb-shaped cross section. The bottom plate portion 11a and the side wall portions 11b on both sides of the bottom plate portion are made thick, and a large number of fins 12 are arranged in parallel between the side wall portions 11b. And cut into predetermined dimensions as needed.

FIG. 6 shows a cutting fin type.
This is a method of extruding an aluminum alloy into a plate shape so that a thick portion 14 is formed at the center, and then cutting the aluminum alloy appropriately to a predetermined length in a longitudinal direction, and cutting the plate to a predetermined length.
13 is manufactured by cutting and raising a large number of thin fins 15 from the surface of the thick portion 14 using a cutting tool or the like.

[0005]

The radiator of the extruded shape shown in FIG. 5 has a simple manufacturing process and can be manufactured relatively inexpensively. Is less than 1 mm, and it is necessary to increase the height of the fins 12 in order to obtain a predetermined heat radiation effect. For this reason, the amount of aluminum used increases, and as a result, the weight also decreases. growing.

Further, in order to obtain a heat radiation effect, the fins 12
Must be separated by several mm or more, and the dimensions in both the height and width directions are large, and it is often difficult to dispose them in a limited space.

On the other hand, the cutting fin type radiator shown in FIG.
For forming fins by cutting, for example, 0.5 mm thick
It is also possible to cut and raise the following thin fins 15 at narrow intervals, and it is excellent in heat dissipation, but the thin thickness of the fins 15 is easy to deform and it is delicate to handle when attaching to electronic equipment. It is difficult to assemble with a robot that is difficult to perform complicated operations, and cannot be used for mass production processes.

In order to solve such a problem, there is a radiator disclosed in Japanese Utility Model Publication No. 61-38237, for example. In this method, corrugated fins and separator sheets are alternately laminated, and brazing sheets are used as the separator sheets and brazed together. However, in the radiator described in Japanese Utility Model Publication No. 61-38237, when brazing, it is necessary to restrain both the corrugated fins and the separator sheet with a special pressing jig so that they do not fall apart.
There was a problem that it was not easy to manufacture.

An object of the present invention is to solve the above-mentioned disadvantages of the prior art, and to provide an aluminum alloy radiator in which a corrugated fin and a separator sheet are alternately laminated and brazed and joined.
When brazing corrugated fins and separator sheets,
It is an object of the present invention to provide an aluminum alloy radiator which can be easily laminated, can be easily brazed without using a special pressing jig, can be easily manufactured, and can improve the heat radiation performance.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention firstly provides a radiator made of aluminum alloy which is braided by alternately laminating corrugated fins and separator sheets and having a rectangular cross section. The gist of the invention is that at least one of the aluminum alloy hollow extruded members is alternately laminated with a corrugated fin formed of a brazing sheet and a separator sheet and brazed.

Secondly, in an aluminum alloy radiator in which corrugated fins and separator sheets are alternately laminated and brazed and joined, at least one of the aluminum alloy extruded profiles having a U-shaped cross section is formed of a brazing sheet. The main point is that the corrugated fins and separator sheets to be formed are alternately laminated and brazed.

Third, in an aluminum alloy radiator in which a corrugated fin and a separator sheet are alternately laminated and brazed and joined, at least one of the aluminum alloy hollow extruded profiles having a rectangular cross section is a brazing sheet. The gist is to dispose the corrugated fins and separator sheets to be formed alternately, and to cut the heat radiation portions formed with the corrugated fins and separator sheets into a plurality of pieces so as to be exposed to the outside. .

According to the first aspect of the present invention, the corrugated fins and the separator sheet are alternately laminated in the aluminum alloy hollow extruded profile having a rectangular cross section. Movement can be regulated, and lamination becomes easy. Also, by arranging the corrugated fin and the separator sheet in a state of being compressed in the laminating direction by utilizing the elasticity of the corrugated fin, the space between the corrugated fin and the separator sheet and the upper and lower portions of the corrugated fin and the upper and lower portions of the extruded profile are formed. Since it comes into contact with the upper and lower wall portions, brazing can be performed without using a pressing jig.

Further, by arranging the corrugated fins in a compressed state as described above, both ends of the corrugated fins are in close contact with the side walls of the profile, and the heat radiation performance is improved.

According to the second aspect of the present invention, since the corrugated fins and the separator sheets are alternately laminated in the aluminum alloy extruded profile having a U-shaped cross section, the corrugated fins and the separator sheet are extruded from the opening. Can be inserted into the profile,
It can be more easily laminated. Then, the corrugated fin and the separator sheet are compressed by using the elasticity of the corrugated fin and the separator sheet in the laminating direction by arranging a plate material in the opening and closing it. Since the gap and these lower parts abut against the lower part of the extruded profile, brazing can be performed with a simple pressure. Further, by disposing the corrugated fins in the compressed state as described above, both ends of the corrugated fins are in close contact with the side walls of the profile, and the heat radiation performance is improved.

According to the third aspect of the present invention, since a part of the corrugated fin is always exposed to the outside, the heat radiation effect is high,
In addition, since a plurality of radiators can be formed at a time by cutting, it can be manufactured at low cost.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view showing a first embodiment of an aluminum alloy radiator according to the present invention, in which a hollow extruded section 1 made of an aluminum alloy having a rectangular cross section (a rectangular section in the illustrated example) is also formed of an aluminum alloy. The corrugated fins 2 and the separator sheets 3 are arranged in an alternately laminated state, and at least one of the corrugated fins 2 and the separator sheets 3 is formed of a brazing sheet which is a plate material in which a brazing material is clad on both surfaces.

In this case, the laminating of the corrugated fins 2 and the separator sheet 3 is performed by stacking the separator sheets 3 at the lower end and the upper end in contact with the hollow extruded profile 1 in the illustrated example. Is formed of a brazing sheet, the separator sheet 3 disposed at this location is not required.

When the corrugated fins 2 and the separator sheet 3 arranged inside the hollow extruded profile 1 are brazed and joined as described above, the corrugated fins 2 and the separator sheet 3 are brazed to each other. In addition, the corrugated fins 2 located at the lower end and the upper end are brazed to the hollow extruded profile 1 via separator sheets 3 disposed above and below the fins 2. As a result, the corrugated fins 2 and the separator sheet 3 joined to each other by brazing are hollow extruded profiles 1.
And fixed in the extruded profile 1.

In the example shown in the figure, the corrugated fins 2 located at the lower end and the upper end are brazed to the hollow extruded profile 1 via the separator sheets 3 arranged above and below, respectively. When the separator sheet 3 is not provided, the corrugated fins 2 located at the upper and lower ends are directly brazed to the hollow extruded profile 1.

The corrugated fin 2 and the separator sheet 3
Fin 2 and separator sheet 3
Insertion into the hollow extruded profile 1 can be easily performed because the lateral movement of the extruded profile 1 is restricted by the side wall portion.

The brazing of the corrugated fins 2 and the separator sheet 3 is performed by inserting the corrugated fins 2 into the furnace and heating the corrugated fins 2 and the separator sheet 3 in a conventional manner. And the upper and lower portions between the corrugated fin 2 and the separator sheet 3 and the upper and lower portions thereof can be brought into contact with the upper and lower wall portions of the hollow extruded profile 1. Can be brazed in a short time without using a pressure jig. Further, by disposing the corrugated fins 2 in a compressed state, the corrugated fins 2 are stretched, so that both ends thereof can be brought into close contact with the side wall portions of the hollow extruded profile 1 and the heat radiation performance can be improved. Both the upper and lower wall portions and the side wall portion can be used as attachment portions for a heating element such as an electronic device.

Further, since the laminated corrugated fins 2 and separator sheet 3 are surrounded on all sides by hollow extruded profiles 1, handling in all directions is possible, and mounting to electronic equipment by a robot is also possible. It becomes possible.

FIG. 2 shows a second embodiment, in which a corrugated fin 2 and a separator sheet 3 are alternately laminated inside an extruded profile 1 made of an aluminum alloy having a U-shaped cross section (in the illustrated example, a horizontally long shape). Other configurations are the same as those of the first embodiment. In this case, since the shape of the extruded profile 1 is U-shaped in cross section, the corrugated fin 2 and the separator sheet 3 can be inserted from the inside of the extruded profile 1 from the opening 1a. It can be more easily arranged.

In order to perform brazing, the opening 1a
An opening is closed by disposing a separately prepared plate material (not shown), and the corrugated fin 2 and the separator sheet 3 are compressed in the laminating direction by utilizing the elasticity of the corrugated fin 2 as in the first embodiment. In the state shown in FIG.
And the lower portions thereof can be brought into contact with the lower wall portion of the extruded profile 1, and can be brazed in a short time without using a pressing jig. Further, by disposing the corrugated fins 2 in a compressed state, both ends of the corrugated fins 2 can be brought into close contact with the side walls of the extruded profile 1 and the heat radiation performance can be improved. Can also be a mounting portion for a heating element such as an electronic device.

Also in the case of the second embodiment, since the left and right sides are surrounded by the extruded profile 1, handling at this location becomes possible, and attachment to the electronic device by the robot is facilitated and work is performed. The performance is improved.

FIG. 3 shows a third embodiment, in which the first embodiment is used.
The radiator made of the aluminum alloy of the embodiment is placed in the lateral direction (A-A
Line direction), vertical direction (BB line direction), diagonal direction (C-
Cutting is performed in the C-direction or in the horizontal direction (A-A direction) and the vertical direction (B-B direction). In this case, cutting is performed so that a heat radiation portion formed by the corrugated fins 2 and the separator sheet 3 is exposed to the outside.

In the radiator cut in this way, at least one of the radiating portions is always exposed to the outside, so that a radiator having a high radiating effect can be obtained.
Therefore, a plurality of radiators can be manufactured at the same time, so that the cost can be reduced.

As the cut radiator, a radiator having a shape corresponding to the mounting location may be selected from a plurality of types having different shapes. For example, if the mounting portion is a plane, the radiator may be in the horizontal direction (AA). If the mounting portion is a corner fillet of a corner, a diagonal direction (CC line direction) or a lateral direction (A
(A line direction) and a longitudinal direction (BB line direction) are used.

In each of the first to third embodiments, FIG.
By bending both ends of the separator sheet 3 by 90 degrees as shown in (1) and bringing the bent portion 3a into contact with the inside of the side wall of the extruded profile 1, the separator sheet 3 and the extruded profile 1 are bent. Because there is surface contact at the part 3a,
The heat radiation effect is further improved. In this case, both ends of the corrugated fin 2 are brought into close contact with the bent portion 3a by being compressed.

[0031]

As described above, in the aluminum alloy radiator of the present invention, first, the corrugated fins and the separator sheet are alternately laminated in the aluminum alloy hollow extruded shape having a rectangular cross section. Lateral movement can be regulated by the side wall portion of the profile, lamination is facilitated, and the corrugated fin and separator sheet are arranged in a state of being compressed in the laminating direction by utilizing the elasticity of the corrugated fin. As a result, the corrugated fins and the upper and lower portions between the corrugated fins and the separator sheets abut against the upper and lower wall portions of the extruded profile,
Can be easily brazed without using a pressing jig.

Further, by arranging the corrugated fins in a compressed state as described above, both ends of the corrugated fins are in close contact with the side walls of the profile, and the heat radiation performance is improved.

Second, since the corrugated fins and the separator sheet are alternately laminated in the aluminum alloy extruded profile having a U-shaped cross section, the corrugated fin and the separator sheet can be inserted into the extruded profile from the opening, It can be more easily laminated.
Then, a plate material is arranged in the opening to close the opening, and the elasticity of the corrugated fin is used to compress the corrugated fin and the separator sheet in the laminating direction, so that the gap between the corrugated fin and the separator sheet is reduced. Since these lower portions are in contact with the lower portion of the extruded profile, brazing can be performed with a simple pressure, and workability is improved.

Third, when the corrugated fin and the separator sheet are disposed inside the extruded profile having a rectangular cross section, if the corrugated fin and the separator sheet are cut into a plurality of pieces, a part of the corrugated fin is always exposed to the outside. Therefore, the heat radiation effect is high, and more than one radiator can be formed at a time by cutting, so it can be manufactured at low cost, and it is possible to obtain a radiator that matches the shape of the mounting location, and the degree of freedom of use is high It becomes.

[Brief description of the drawings]

FIG. 1 is a front view showing a first embodiment of an aluminum alloy radiator of the present invention.

FIG. 2 is a front view showing a second embodiment of the aluminum alloy radiator of the present invention.

FIG. 3 is a front view showing a third embodiment of the aluminum alloy radiator of the present invention before cutting.

FIG. 4 is a front view of a main part showing an embodiment of the aluminum alloy radiator of the present invention.

FIG. 5 is a front view of a conventional extruded-shaped radiator.

FIG. 6 is a perspective view of a conventional cutting fin radiator.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Extruded profile 1a ... Opening 2 ... Corrugated fin 3 ... Separator sheet 3a ... Bending part 11 ... Frame 11a ... Bottom plate part 11b ... Side wall part 12 ... Fin 13 ... Plate-shaped body 14 ... Thick part 15 ... Fin

Claims (3)

[Claims] 1. An aluminum alloy radiator in which corrugated fins and separator sheets are alternately laminated and brazed and joined, wherein at least one of the aluminum alloy hollow extruded profiles having a rectangular cross section is formed of a brazing sheet. A radiator made of an aluminum alloy, wherein corrugated fins and separator sheets are alternately laminated and brazed. 2. An aluminum alloy radiator in which corrugated fins and separator sheets are alternately laminated and brazed and joined, wherein at least one of the aluminum alloy extruded members having a U-shaped cross section is formed of a brazing sheet. An aluminum alloy radiator, wherein corrugated fins and separator sheets are alternately stacked and brazed. 3. An aluminum alloy radiator in which corrugated fins and separator sheets are alternately laminated and joined by brazing, wherein at least one of the aluminum alloy hollow extruded members having a rectangular cross section is formed of a brazing sheet. The corrugated fins and the separator sheets are alternately laminated and brazed and joined, and the heat radiation portion formed with the corrugated fins and the separator sheets is cut into a plurality of pieces so as to be exposed to the outside. Aluminum alloy radiator.