JPH0636585Y2 - Heat sink for electric element - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a radiator for an electric element in which a heat-generating component such as a transistor, a diode, or a thyristor is attached, and heat generated inside the heat-generating component is radiated. .

[Conventional technology]

Conventionally, as a radiator for electric elements for releasing heat generated from heat-generating components such as transistors, a large number of metal fins are mounted on a metal base shaft to which the heat-generating components are attached, with a spacer as a jig interposed. It is known that it is inserted at a predetermined interval.

[Problems to be solved by the device]

In the above conventional radiator for electric elements, since a spacer as a jig must be interposed in order to maintain a predetermined interval between fins at the time of assembly, it is not easy to manufacture and the cost is low. I was not satisfied with it.

The present invention eliminates the above-mentioned conventional drawbacks,
The present invention provides a radiator for an electric element, which does not require a spacer, is simple to manufacture, and has good heat dissipation efficiency, at low cost.

[Means for Solving the Problems]

In the radiator for an electric element of the present invention, a plate-like fin having a base shaft insertion hole is provided with a plurality of protrusions having the same height on both sides of the fin by cutting and pushing and bending one portion of the fin. The fins are arranged every other sheet, and a plurality of sheets are superposed to insert the base shafts into the base shaft insertion holes, and the outer peripheral surface of the base shafts and the inner peripheral surface of the base shaft insertion hole of the fin are joined together. It has a feature.

[Function of device]

In the radiator for electric elements according to the present invention, a plurality of fins having protrusions on both sides and fins having no protrusions are alternately stacked. Then, the protrusion provided on the fin comes into contact with another adjacent fin, and a space corresponding to the height of the protrusion is formed between the fins. That is, the fin protrusions arranged every other sheet serve as spacers.

Further, by providing the projecting pieces, through holes are formed in the fins, and the fluid passing between the fins also passes through the through holes.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is an exploded perspective view, FIG. 2 is a sectional view, and FIG. 3 is a partially cutaway perspective view of a fin showing another embodiment.

As shown in FIGS. 1 and 2, the radiator for an electric element according to the present invention comprises a plurality of plate fins 1, 1'and a base shaft 2. The fins 1 and 1 ′ are made of a metal having a good heat conductivity such as aluminum alloy, copper, brass, etc., and the base shaft insertion hole 3 is formed therein. The base shaft insertion hole 3 is used to insert the base shaft 2 and is shown as an example of a hole formed in the center of the fin 1, 1 '. Although not shown, the base shaft insertion hole may be located close to one side of the fin, and the base shaft insertion hole does not have to be circular as long as the base shaft can be inserted to fix the fin. One of the fins 1 and 1'is provided with a plurality of protrusions 4 having the same height on both surfaces thereof. The projecting piece 4 is provided by cutting and pressing one portion of the fin 1 ′, and is shown as an example of the projecting piece 4 which is provided at the opposite corner with the base shaft insertion hole 3 as the center. However, the position of the protruding piece 4,
The number and shape are not limited to those illustrated. For example, as shown in FIG. 3, the fins 1 ′ may have a circular shape, and the protrusions 4 may be provided at the peripheral edge of the fins 1 ′ and in the vicinity of the base shaft insertion hole 3 so that their orientations are radial with respect to the base shaft. Good. With this structure, the fluid flowing in the heat radiating direction can be prevented from being affected by the protrusions to the minimum extent, and thus can smoothly flow. Since the projecting piece 4 is provided by cutting and bending one portion of the fin 1 ', a through hole 5 is formed in that portion. A plurality of such fins 1'and the fins 1 not provided with the protruding pieces are alternately stacked. In other words, fin 1 '
The fins 1 ′ and the fins 1 are superposed on each other and the base shaft 2 is inserted into the base shaft insertion holes 3.
Although the basic shaft 2 has a circular cross section and is solid, the basic shaft 2 may have a cross sectional shape or a hollow shape. To insert the base shaft 2, the base shaft 2 is erected, and the fins 1 ′ and the fins 1 are alternately inserted into the base shaft insertion holes 3 from above the base shaft 2.
Alternatively, the fins 1 ′ and the fins 1 may be alternately stacked, and the base shaft insertion holes 3 thereof may be substantially aligned with each other, and then the base shaft 2 may be inserted into the base shaft insertion hole 3 from above. The outer peripheral surface of the base shaft 2 and the inner peripheral surface of the base shaft insertion hole 3 are joined together. The joining is performed by brazing, for example, by providing a brazing material layer on one side or both sides of the fin or on the outer peripheral surface of the base shaft. Alternatively, a strong force may be applied in the lengthwise direction of the base shaft 2 to compress the base shaft 2 so that the base shaft 2 is expanded in diameter and pressure-bonded.

In the present invention, when a plurality of fins 1 and fins 1'are overlapped with each other, the tips of the protrusions 4 of the fins 1'are brought into contact with the fins 1 having no vertically adjacent protrusions, and the upper and lower fins 1 ' An interval corresponding to the height of the protruding piece 4 is formed therebetween. In other words, each protrusion 4 serves as a spacer of a conventional product.

Moreover, since the through holes 5 are formed in the fins 1 ′, the fluid flowing between the fins also passes through the through holes 5.

[Effect of device]

As described above, according to the present invention, the projecting pieces provided on the plate-shaped fins play the role of spacers, and no spacers are required for stacking, so that the material can be saved and the structure can be simplified. Can be provided to.

Further, since the fluid also passes through the through holes formed in the fins, the heat dissipation efficiency is good, and excellent performance as a radiator for electric elements is exhibited.

[Brief description of drawings]

FIG. 1 is an exploded perspective view, FIG. 2 is a sectional view, and FIG. 3 is a partially cutaway perspective view of a fin showing another embodiment. In the figure, 1 and 1'denotes plate fins, 2 a metal base shaft, 3 a base shaft insertion hole, and 4 a projecting piece.

Claims (2)

[Scope of utility model registration request] 1. A metal base shaft to which a heat-generating component is attached,
In a radiator for an electric element in which a large number of metal fins are inserted at predetermined intervals and joined, one part of the fin is cut open and bent to provide a plurality of protrusions of equal height on both sides, and every other fin A radiator for an electric element, which is characterized in that 2. The radiator for an electric element according to claim 1, wherein the projections are oriented radially with respect to the base axis.