JPH10313080A - Radiator and manufacture of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiator having sufficient strength by simplifying constitution without damaging heat dissipation effects, and a method for manufacturing it. SOLUTION: A base plate 1 is jointed to one folded face of a corrugated fin 2 in which metallic thin plates having high thermal conductivity such as aluminum are bent like a fold, and a wire gauze 3 made of aluminum is jointed to the other folded face of the corrugated fin 2. Also, the base plate 1, the corrugated fin 2, and the wire gauze 3 are jointed by brazing at the same time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiator used for heat radiation of, for example, a power amplifying transistor and a method of manufacturing the radiator.

[0002]

2. Description of the Related Art A conventional radiator used for heat radiation of a power amplifying transistor has a structure in which a corrugated fin 2 is joined to a base plate 1 on which a power amplifying transistor is mounted as shown in FIG. There is something. The base plate 1 is, for example, a plate made of an aluminum alloy. The corrugated fin 2 is formed by, for example, folding a thin plate made of an aluminum alloy into a pleated shape.

In a power amplifier such as a high-output transmitter, a large number of power amplifying transistors are used.
The power amplifying transistors are modularized into one or several units, and are housed in a rack. in this case,
The radiator is mounted on the housing of each module, and air is blown toward the radiator inside the rack to enhance the heat radiation effect.

[0004] For this reason, the radiator is often attached to the module casing in a bare state, and when the casing is transported, mounted, or removed, the hand is touched or bumped to apply excessive force. Often.

In particular, in the radiator having the above-mentioned structure, since the corrugated fin 2 is made of a thin metal plate, the radiator is weak against a lateral force, and the fin is lightly pressed with a finger as shown in FIG. Had the disadvantage that it was easily crushed. If it is crushed in this way, a sufficient air flow cannot be applied to the corrugated fins 2 and the heat radiation effect is reduced, which is not preferable in use.

[0006]

As described above, the conventional radiator having a corrugated fin has a disadvantage that the corrugated fin is easily crushed, and thus the heat radiation effect is easily impaired. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a radiator having a sufficient strength with a simple structure without impairing the heat radiation effect and a method of manufacturing the same.

[0007]

In order to achieve the above object, a radiator according to the present invention comprises a base plate on which a heating element is mounted, and a corrugated metal plate which is folded in a pleated shape and joined to the base plate. The corrugated fin is characterized by comprising a fin and a wire mesh joined on a fold surface of the corrugated fin.

[0008] With this configuration, since the corrugated fins are connected to each other via the wire mesh, concentrated loads from the outside can be dispersed and supported by the corrugated fins. That is, the corrugated fin is reinforced by the wire mesh. In addition, since the heat radiation area is increased by attaching the wire netting, it is possible to contribute to enhancing the heat radiation effect.

In the method for manufacturing a radiator according to the present invention, a corrugated fin formed by folding a thin metal plate into a fold shape is joined to a base plate to which a heating element is attached, and a wire mesh is joined to a fold surface of the corrugated fin. A method for manufacturing a radiator, comprising: joining the base plate, the corrugated fins, and the wire mesh by simultaneously brazing them.

That is, the base plate, the corrugated fin, and the wire mesh are joined together by brazing, instead of welding and connecting the contacts of the base plate, the corrugated fins, and the contacts of the corrugated fin and the wire mesh at a time. The labor required for joining can be reduced.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. In FIG. 1, the same parts as those in FIG. 3 are denoted by the same reference numerals, and detailed description will be omitted. FIG. 1 shows a radiator 10 according to an embodiment of the present invention.
Is shown. FIG. 1A is a front view of the radiator 10, and FIG. 1B is a side view. This radiator 10
One corrugated fin 2 is joined to one surface of the base plate 1, and the wire mesh 3 is joined so as to overlap the other corrugated fin 2. This wire mesh 3 is made of, for example, an aluminum alloy,
It has an expanded structure in which a thin plate of the same material is finely cut and expanded.

In the above configuration, for example, it is assumed that an external force F is applied to the corrugated fin 2 from the direction of the arrow in the drawing. Then, the external force F is applied to the corrugated fin 2 and the wire mesh 3
At the junction of That is, even if the external force F is concentrated on a part of the corrugated fin 2,
This external force F is dispersed and supported throughout the corrugated fin 2.

As a result, it is possible to make the corrugated fin 2 hard to be crushed by the external force F. Thereby, the usability is improved, and it is possible to prevent the corrugated fins 2 from being crushed and the heat radiation effect from being reduced. Furthermore, since the metal net 3 itself has a heat radiation effect, the heat radiation effect can be further enhanced as a whole.

Further, since it becomes possible to withstand a larger external force than before, the thin plate forming the corrugated fin 2 can be made thinner than before. For this reason, the density of the corrugated fins can be increased, and the heat radiation effect can be further enhanced.

Next, an example of use of the radiator 10 will be described with reference to FIG. The radiator 10 according to the present embodiment includes, for example, a box-shaped amplifier module 4 as shown in FIG.
Attached to the side. The plurality of amplifier modules 4 are housed in the rack of the power amplifier 5 to generate a high output as a whole, and the work of replacing the power amplification transistor can be easily performed.

FIG. 2B is a diagram schematically showing an internal state of the power amplifier 5. A blower chamber 6 is provided inside the power amplifier 5, and when each amplifier module 4 is set on a rack, each radiator 10 faces the blowing hole 7 opened in the blower chamber 6. ing. Then, compressed air from a blower (not shown) is sent to the air blow chamber 6, and an air flow is blown out from the blow hole 7 toward the radiator 10, thereby cooling each amplifier module 4.

In FIG. 2A, similarly to the conventional case, when the amplifier module 4 is taken in and out of the rack, a large force is applied to the corrugated fin 2 by hooking or touching the adjacent amplifier module 4. There is. However, since the corrugated fin 2 is reinforced by the wire mesh 3 as described above, it is not easily crushed, and the amplifier module 4
There is no danger that the corrugated fins 2 will be crushed even if the material is handled a little violently. Therefore, the amplifier module 4 can be safely used.
Can be handled.

Further, as shown in FIG. 2B, the air flow easily passes through the mesh of the wire mesh 3 and the corrugated fin 2
Spray. That is, since the wire mesh 3 does not block the air flow, the heat radiation effect of the corrugated fin 2 is not impaired. Moreover, since the wire net 3 itself has a heat radiation effect, the heat radiation effect can be further enhanced as a whole.

Next, a method for manufacturing the radiator 10 will be described. The radiator 10 is formed by applying a brazing material such as silver brazing to a joint portion between the base plate 1 and the corrugated fin 2 and a joint portion between the corrugated fin 2 and the wire netting 3 and superimposing them. It is manufactured by doing.

That is, the base plate 1, the corrugated fins 2, and the wire mesh 3 are joined by brazing at the same time. For this reason, the labor required for joining the wire mesh 3 can be omitted.

The present invention is not limited to the above embodiment. For example, in the above embodiment, the present invention is applied to a radiator that cools the amplifier module 4, but the present invention is also applied to various radiators such as a radiator that cools an automobile engine. Is possible.

[0022]

As described in detail above, the radiator of the present invention
Since it has a base plate to which a heating element is attached, a corrugated fin which is formed by folding a thin metal plate into a fold shape and is joined on the base plate, and a wire mesh which is joined to the upper surface of the fold of the corrugated fin. ,
A radiator having sufficient strength can be obtained by simplifying the configuration without impairing the heat radiation effect.

The method of manufacturing a radiator according to the present invention may further comprise a base plate to which a heating element is attached, a corrugated fin formed by folding a thin metal plate into a fold shape, and a corrugated fin upper surface of the corrugated fin. And a step of joining by simultaneously brazing the wire mesh to be joined with the metal mesh, so that the labor required for joining can be omitted.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a radiator according to an embodiment of the present invention.

FIG. 2 is a view showing an example of use of a radiator according to the embodiment of the present invention.

FIG. 3 is a diagram showing a conventional radiator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base plate 2 ... Corrugated fin 3 ... Wire mesh F ... External force 4 ... Amplifier module 5 ... Power amplifier 6 ... Ventilation chamber 7 ... Fumarole

Claims (4)

[Claims] 1. A base plate to which a heating element is attached, a corrugated fin formed by folding a thin metal plate into a fold shape, and a wire mesh bonded on a fold surface of the corrugated fin. A radiator comprising: 2. The radiator according to claim 1, wherein said base plate and said corrugated fin, and said corrugated fin and said wire mesh are joined by brazing. 3. The radiator according to claim 1, wherein the wire net has an expanded structure. 4. A method for manufacturing a radiator comprising joining a corrugated fin formed by folding a thin metal plate into a fold shape on a base plate to which a heating element is attached, and joining a wire netting to a fold surface of the corrugated fin. A method for manufacturing a radiator, comprising: joining the base plate, the corrugated fins, and the wire mesh by simultaneously brazing them.