JPH079435Y2 - Heat sink for electric element - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a radiator for an electric element. Specifically, a so-called heat-dissipating component such as a diode, a transistor, or a thyristor is attached, and air is circulated from one side to the other by a fan in a fin passage fixed to a metal substrate to radiate heat generated inside the heat-generating component. The present invention relates to a forced air cooling type radiator for electric elements.

[Conventional technology]

A forced air-cooling type electric element in which a fin provided with a large number of flow paths is fixed to a metal substrate, and air is circulated from one side to the other by a fan in the flow path of the fin to radiate heat generated from a heat-generating component. As a radiator for use in the past, in order to improve heat radiation efficiency, a fan is attached via a wind tunnel so that the wind from the fan flows uniformly over the entire fin flow path. ing.

[Problems to be solved by the device]

In the conventional radiator for electric elements described above, although the wind from the fan flows through the entire fin flow path to improve the heat radiation efficiency, a wind tunnel with the fan attached is required, and the attachment is complicated. I had a problem.

The present invention has been devised in view of the conventional problems described above, and a wind tunnel is separately provided by configuring the metal substrate and the fin ends of both side edges to function as a wind tunnel. It is an object to provide a radiator for electric elements, which does not need to be prepared and has good heat radiation efficiency.

[Means for Solving the Problems]

The present invention is a radiator for an electric element, wherein a plurality of flow paths are provided on a metal substrate on which heat-generating components are mounted and fins are fixed, and air is caused to flow in each flow path of the fins by a fan. The fins on both side edges of the fin are fixed so that their end faces are flush with the end face of the metal substrate. Further, the fins other than the fins on the both side edge portions are characterized in that their end faces are located inside and fixed to the end face of the metal substrate.

[Function of device]

In the present invention, the end portion of the metal substrate and the end portions of the fins on both side edges are in a state similar to a wind tunnel. It suffices to attach a fan to this part, and it is the same as when it is attached via the wind tunnel.

〔Example〕

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

FIG. 1 is an exploded perspective view, and FIG. 2 is a transverse sectional view of a main part.

The heat sink for an electric element according to the present invention, as shown in FIG.
It consists of a metal substrate 1, fins 2 and fan 3,
The metal substrate 1 and the fins 2 are made of, for example, a heat conducting member such as aluminum alloy or copper. A plurality of heat-generating components 4 such as transistors and diodes are attached to the metal substrate 1, and a number of flow paths 5 are provided in the fins 2. The fins 2 are fixed to the metal substrate 1. Fin 2
Is fixed to the metallic substrate 1 by, for example, sequentially stacking a number of fin units and brazing. However, the shape and size of the fins 2, especially the shape of the flow path 5 are not limited to those illustrated. Air is forcibly circulated in each flow path 5 of the fin 2 by the fan 3 so that the heat generated from the heat generating component 4 is radiated from the entire surface of the metal substrate 1. The fins 21 on both side edges of the fin 2 are fixed so that their end faces are flush with the end face of the metal substrate 1. In the drawing, the fins 21 on both side edge portions are the same length as the metal substrate 1, and the end faces thereof are flush with each other. However, although not shown, the fins 21 on both side edges may be shorter than the metal substrate 1 as long as they are fixed so that their end faces are flush with each other. On the other hand, the fins other than the fins 21 on both side edges, that is, the fins 22 at the central portion, are fixed such that their end faces are located inside the end faces of the metal substrate 1. The end surface of the fin 22 is shown in an aligned state.
If it is inside of the end face of, it is not always necessary to fix it in an aligned state.

In the present invention as described above, the metal substrate 1 is surrounded by the end portions 21 of the fins on both side edges in a rectangular cross section. As shown in FIG. 2, the fan 3 is provided in this portion.
Just attach it and it will be the same as if it was attached via the wind tunnel.

[Effect of device]

As described above, according to the present invention, since the end of the metal substrate and the ends of the fins on both side edges serve as a wind tunnel, it is not necessary to separately prepare a wind tunnel and attach it. Further, when the fan is attached, the wind from the fan is made to uniformly flow through the entire fin flow path, as in the case where the fan is attached via the wind tunnel, so that the heat dissipation efficiency of the electric element is extremely excellent.

[Brief description of drawings]

The drawings show an embodiment of a radiator for an electric element according to the present invention. FIG. 1 is an exploded perspective view, and FIG. 2 is a cross-sectional view of a main part. In the figure, 1 is a metal substrate, 2 is a fin, 3 is a fan, 4 is a heat-generating component, 21 is a fin on both side edges, and 22 is a fin at the center.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-54-127579 (JP, A) Actually open 3-39894 (JP, U) Actually open 1-16692 (JP, U) Actually open 63- 195796 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A radiator for an electric element, wherein a plurality of flow paths are provided on a metal substrate on which heat-generating components are mounted and fins are fixed, and air is allowed to flow in each flow path of the fins by a fan. The fins of both side edges are fixed so that the end faces thereof are flush with the end face of the metal substrate, and the other fins except the fins of the both side edges have the end faces inside the end face of the metal substrate. A radiator for an electric element, characterized in that it is positioned and fixed to.