JPH0333073Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a heat sink for an electric device. More specifically, a fin mounting plate is provided upright on a metal substrate, a plurality of fins are provided on the fin mounting plate, and heat generating components such as transistors, diodes, and thyristors are mounted on the metal substrate. This invention relates to a heat radiator for electric elements that radiates heat generated inside.

[Conventional technology]

Heat radiators for electric elements that have a plurality of fins on a metal substrate, heat generating components such as transistors are attached to the metal substrate, and radiate heat generated from the heat generating components have been provided in various structures. has been done. For example, a fin mounting plate is erected on a metal substrate, and both sides of the fin mounting plate are coated with a brazing material, or are made of a material coated with a brazing material, and
There is one in which fins bent in a zigzag cross section are brazed to the fin mounting plate. however,
This conventional product had a drawback in that a special jig had to be used when attaching the fins to the fin mounting plate. In addition, a device in which a plurality of fins are provided by plowing up both sides of a fin mounting plate set upright on a metal board is also available, but this is not easy to plow up, and moreover, The drawback was that the fins produced resonance noise during use.

[Problem that the invention attempts to solve]

The present invention solves the above-mentioned conventional drawbacks.In addition to forming a bulge on the fin mounting plate installed upright on a metal substrate, the fins have a plurality of fins that have a bulge approximately in the cross-sectional outer circumferential shape of the fin mounting plate. By providing matching notch holes and inserting each fin into the fin mounting plate, the fin mounting plate and the fins are firmly fixed, resulting in good heat dissipation efficiency and the generation of resonance noise. To provide a heat radiator for an electric element that can be easily assembled without any problems.

[Means for solving problems]

The present invention is a heat radiator for an electric element in which a fin mounting plate is provided upright on a metal substrate on which a heat-generating component is mounted, and a plurality of fins are provided on the fin mounting plate, and the fin mounting plate is provided along the longitudinal direction of the fin mounting plate. A bulge is formed. On the other hand, the plurality of fins are provided with notched holes that substantially match the cross-sectional outer circumference of the fin mounting plate. The fins are fitted onto the outer periphery of the fin mounting plate at appropriate intervals and fixed.

[Effect of invention]

The heat sink for electric elements of the present invention has a fin mounting plate erected on a metal substrate, a plurality of fins are attached to the fin mounting plate, and heat generating parts such as transistors are attached to the metal substrate. , dissipates heat from heat-generating components. The fin mounting plate has a bulge formed therein, and the fins, which have notched holes that approximately match the cross-sectional outer circumferential shape of the fin mounting plate, are inserted into the outer periphery of the fin mounting plate at predetermined intervals. Since the fin mounting plate and the fin mounting plate are in sufficient contact with each other, thermal conductivity is good. Further, since the fins and the fin mounting plate are in a fitted state and in contact with each other, the fins are not unnecessarily pulled out from the fin mounting plate without using a jig, and the fins can be easily positioned.

Note that if the bulging part of the fin mounting plate is made hollow and its diameter is enlarged, the fin mounting plate and fins will come into close contact with each other, improving thermal conductivity, and the refrigerant will be able to pass through the bulging part. become.

〔Example〕

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

FIG. 1 is an exploded perspective view, FIG. 2 is a partially cutaway perspective view, FIG. 3 is a partially sectional view, and FIG. 4 is an exploded perspective view showing another embodiment.

As shown in FIGS. 1 to 3, the heat sink for electric elements according to the present invention has a heat generating component 2 attached to the lower surface of a metal substrate 1, and a metal substrate 1 mounted in the center of the upper surface of the metal substrate 1. A fin mounting plate 3 is provided upright along the longitudinal direction. The metal substrate 1 and the fin mounting plate 3 are made of a heat conductive material such as aluminum alloy or copper, and are integrally formed by extrusion molding. Moreover, this fin mounting plate 3 has a plurality of fins 4.
Two annular portions 5 are formed along the longitudinal direction. On the other hand, Finn 4
Like the metal substrate 1 and the fin mounting plate 3, the fin mounting plate 3 is made of a heat conductive material such as aluminum alloy or copper, or iron, and the fin mounting plate 3 is located in the center thereof.
A notch hole 6 is bored that substantially matches the cross-sectional outer circumferential shape of. The fins 4 are fitted from one end of the fin mounting plate 3 to its outer periphery at appropriate intervals. At this time, although not shown, it is preferable to interpose a spacer of a predetermined length between each fin, since the spacing between the fins can be maintained constant. In this way Finn 4
is inserted into the fin mounting plate 3 and fixed. To fix the fins 4, brazing, welding, or any other method may be used. In addition, the bulge part 5 of the fin attachment plate 3 is made hollow, and the diameter of the bulge part 5 is expanded. To expand the diameter of the bulge 5, use an insertion tool (not shown) whose outer diameter is larger than the inner diameter of the bulge 5.
is press-fitted into the bulged portion 5.

The present invention is not limited to what has been described above. for example,
As shown in FIG. 4, the fins 4 may have a substantially rectangular cross section. Further, as long as the fin mounting plate is formed with a bulge and the fin is provided with a cutout hole that substantially matches the cross-sectional outer circumferential shape of the fin mounting plate, the shape and size of the fins are not limited.

In the present invention as described above, a heat generating component 2 such as a transistor is attached to a metal substrate 1. The heat generated from the heat generating component 2 is sequentially transmitted to the metal substrate 1, the fin mounting plate 3, and the fin 4, and is radiated. The fin mounting plate 3 erected on the metal substrate 1 and the fins 4 fitted into the fin mounting plate 3 are in sufficient contact and have good thermal conductivity. Moreover, the fins 4 do not come off from the fin mounting plate 3, making it easy to position them and making it easy to attach the fins 4.

Note that the bulging portion 5 of the fin mounting plate 3 is hollow,
When the diameter of the bulging portion 5 is enlarged, the fins 4 are brought into close contact with each other, improving thermal conductivity, and the refrigerant is allowed to pass through the bulging portion 5.

[Effect of idea]

As described above, according to the present invention, the fin mounting plate and the fins are in sufficient contact with each other and are in a close state, resulting in good thermal conductivity, so that the heat radiator for electric elements has extremely good heat radiation efficiency. In addition, since the fins and the fin mounting plate are in a fitted state and in contact, the fins will not be pulled out of the fin mounting plate without using a jig, and the fins can be easily positioned, so that shocks, etc. Even if the fins do not separate from the fin mounting plate, the above-mentioned state of close contact can be maintained, and
This is a heat sink for electric elements that is easy to assemble and does not generate resonance noise.

[Brief explanation of drawings]

The drawings show an embodiment of the heat sink for electric elements according to the present invention, in which FIG. 1 is an exploded perspective view, FIG. 2 is a partially cutaway perspective view, FIG. 3 is a partially sectional view, and FIG. 4 is a partially cut away perspective view. It is an exploded perspective view showing another example. In the figure, 1 is a metal substrate, 2 is a heat generating component, 3 is a fin mounting plate, 4 is a fin, 5 is a bulge, and 6 is a notch hole.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a heat sink for an electric element in which a fin mounting plate is provided upright on a metal substrate on which a heat generating component is mounted, and a plurality of fins are provided on the fin mounting plate, A bulge is formed along the longitudinal direction of the fin, and the plurality of fins are provided with notched holes that approximately match the cross-sectional outer circumferential shape of the fin mounting plate, and the fins are attached to the outer periphery of the fin mounting plate at appropriate intervals. A heatsink for electric elements. (2) The radiator for an electric element according to claim 1 of the utility model, characterized in that the bulging portion of the fin mounting plate is hollow and the diameter of the bulging portion is enlarged.