JP2010153436A - Cooling device for electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling device for electronic equipment that is positioned at a part opposed to the rotary shaft of a cooling fan and makes fins which do not function effectively to sufficiently exhibit cooling effects as whole of fins. <P>SOLUTION: The cooling device 11 for electronic equipment includes a heat sink 5 having a plurality of fins 4 provided on one surface of a base portion 3 mounted with a heat generating body 2, and the cooling fan 6 arranged by the heat sink 5 and supplying cooling air to between the fins 4 and 4 to cool the heat generating body 2. The fins 4 opposed to each other across a position on an extension line of the center of the rotary shaft of the cooling fan 6 are bent apart from each other to form a gap matching an outer periphery of the rotary shaft of the cooling fan 6 between the fins. The fins 4 are formed by bending metal plates substantially in a dogleg shape, and those fins 4 bent substantially in the dogleg shape are fitted in opposite directions such that mutual bending peak portions are apart from each other across the position on the extension line of the center of the rotary shaft. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cooling device for an electric device provided with a heat sink for cooling a heating element such as a CPU (central processing unit) of a personal computer.

  As shown in FIG. 5 and FIG. 6, as the electric apparatus cooling apparatus 1, a cooling fan 6 is provided on the side of a heat sink 5 in which a plurality of fins 4 are provided in parallel on one surface of a base portion 3 on which a heating element 2 is mounted. An arrangement is known in which cooling air is supplied between the fins by the rotation of the cooling fan 6 to cool the heating element 2 via the heat sink 5.

As shown in FIG. 7, the cooling fan 6 is configured by attaching a plurality of blade pieces 9 radially around a rotating shaft 8 rotated by a motor 7, and the rotating shaft 8 is rotated by the motor 7. The wind is generated by the blade piece 9 and the wind is supplied between the fins 4. (For example, Patent Documents 1 and 2)
In addition, as shown in FIG. 8, in order to improve the cooling effect without increasing the height of the fin 4, the fin 4 bent in a substantially W shape has been developed. The fin 4 is formed of a metal plate material, and is attached to the base portion 3 by a method of inserting one end portion into a mounting groove 3a provided in the base portion 3 and soldering. (For example, Patent Document 3)
JP 05-328743 A Japanese Patent Application Laid-Open No. 07-176653 Japanese Utility Model Publication No. 04-117459

  By the way, in the conventional cooling apparatus 1 for electric equipment, as shown in FIG. 6, since the plurality of fins 4 are arranged in parallel at equal intervals, as shown in FIG. The cooling air is not effectively supplied to the portion 4 </ b> A (inside the circle indicated by the two-dot chain line) that faces 8. Therefore, there has been a problem that the cooling effect of the fin as a whole is diminished.

  The present invention solves the above-described conventional problems, and effectively functions the fins that are located at a portion facing the rotating shaft of the cooling fan and that do not function effectively, thereby sufficiently exerting the cooling effect as a whole fin. The object of the present invention is to provide a cooling device for electric equipment that can be used.

The invention of claim 1 is a heat sink in which a plurality of fins are provided on one surface of a base portion on which a heating element is mounted, and is arranged on the side of the heat sink to supply cooling air between the fins via the heat sink. A cooling fan for cooling the heating element, and
The fins facing each other at the position on the extension line of the center of the rotation axis of the cooling fan are bent in a direction away from each other, and a gap corresponding to the outer periphery of the rotation shaft of the cooling fan is formed between the opposing fins. .

  According to a second aspect of the present invention, there is provided the cooling apparatus for electric equipment according to the first aspect, wherein the plurality of fins are formed by bending a metal plate into a substantially square shape, and the fins folded into the substantially square shape are The cooling fan was mounted in the opposite direction so that the folding tops were separated from each other with the extended line at the center of the rotation axis of the cooling fan as a boundary.

(1) Since the cooling device for electric equipment according to claim 1 faces the rotating shaft of the cooling fan and escapes the fin from the portion where the cooling air is not effectively supplied to the outer peripheral side of the rotating shaft of the cooling fan. Therefore, the cooling efficiency of the entire fin can be improved.
(2) In the cooling device for electric equipment according to the second aspect, since the fins are attached in the opposite direction with respect to the position where the rotation axis of the cooling fan is opposed, the fins of the boundary portion are the rotation axis of the cooling fan. As a result, the cooling efficiency of the entire fin can be improved.

  FIG. 1 is a perspective view showing a state in which a cooling device 11 for an electric device according to the present invention is viewed upside down. The basic configuration of the electrical device cooling apparatus 11 is substantially the same as the configuration of the conventional electrical device cooling apparatus 1. That is, the cooling device 11 for electric equipment includes a heat sink 5 provided with a plurality of fins 4 on one surface of the base portion 3 on which the heating element 2 is mounted, and is disposed on the side of the heat sink 5 between the fins 4 and 4. And a cooling fan 6 for cooling the heat generating element 2 through the heat sink 5. As shown in FIG. 7, the cooling fan 6 is configured by attaching a plurality of blade pieces 9 radially around a rotating shaft 8 rotated by a motor 7.

  The main difference between the electrical device cooling device 11 of the present invention and the conventional electrical device cooling device 1 is that, as shown in FIGS. 1 and 2, the extended position P at the center of the rotating shaft 8 of the cooling fan 6 is set. This is because the fins 4 facing each other are bent in a direction away from each other.

  The plurality of fins 4 are formed by bending a metal plate into a substantially square shape. These fins 4 are attached in opposite directions in the direction in which the bending top portions 4a are separated from each other with the extended position P at the center of the rotation shaft 8 of the cooling fan 6 as a boundary. A substantially diamond-shaped space G larger than the outer diameter of the rotating shaft 8 of the cooling fan 6 is formed between the fins 4 facing each other at the center extended position P.

  Accordingly, the fins 4 positioned in front of the rotation shaft 8 of the cooling fan 6 are arranged on the outer peripheral side of the rotation shaft 8 where the cooling air easily hits from the position where the cooling air does not easily hit the opposite portion of the rotation shaft 8 of the cooling fan 6. To improve the cooling efficiency of the entire fin.

  FIG. 3 shows the heat sink 5 used in the electrical apparatus cooling apparatus 11 to which two cooling fans 6 are attached. In this embodiment, for each portion where the rotation shaft 8 of each cooling fan 6 is located, the rotation shaft 8 of the cooling fan 6 is located between the fins 4 facing each other at the extended position P of the center of the rotation shaft 8. A substantially diamond-shaped space G larger than the outer diameter is formed.

  4A and 4B show a modification of the fin 4. FIG. 4A shows a case where the fin 4 is formed by being bent into a substantially arc shape, and FIG. 4B shows a case where the fin 4 is formed by being bent into a substantially U shape. The fins 4 are not limited to those having the above-mentioned shape. In short, the outer diameter of the rotating shaft 8 of the cooling fan 6 is between the fins 4 facing each other with the extended position P at the center of the rotating shaft 8 as a boundary. Any shape that can form a large space G may be used.

The perspective view of the cooling device for electric equipments of this invention. Explanatory drawing of the principal part. Explanatory drawing of another Example. A is explanatory drawing of the modification of a fin, B is explanatory drawing of the other modification of a fin, The perspective view of the conventional cooling device for electric devices. The perspective view of the normal state which turned over the conventional cooling device for electric devices, and was seen. Explanatory drawing of a cooling fan. Explanatory drawing of the heat sink which bent the fin in the substantially W shape. Explanatory drawing which shows the trouble of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,11 ... Cooling device for electric equipment 2 ... Heating element 3 ... Base part 4 ... Cooling fin 5 ... Heat sink 6 ... Cooling fan 7 ... Motor 8 ... Rotating shaft 9 ... Blade piece

Claims (2)

A heat sink provided with a plurality of fins on one surface of the base portion on which the heat generating element is mounted, and a cooling air disposed between the fins to supply cooling air between the fins to cool the heat generating element via the heat sink. In a cooling device for electrical equipment comprising a cooling fan,
The fins facing each other at the position on the extension line of the center of the rotation axis of the cooling fan are bent in a direction away from each other, and a gap corresponding to the outer periphery of the rotation shaft of the cooling fan is formed between the opposing fins. A cooling device for electrical equipment, characterized in that. The plurality of fins are formed by bending a metal plate into a substantially letter-shaped shape, and the fins bent into a substantially letter-shaped shape are connected to each other with an extension line at the center of the rotation axis of the cooling fan as a boundary. The cooling device for electric equipment according to claim 1, wherein the folding top portion is attached in an opposite direction so as to be separated from each other.

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