JP3936614B2 - Element cooler - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is an improvement of an element cooler for cooling small parts such as semiconductor elements mounted on electronic equipment and electric power equipment, thyristors, inverters, IGBTs, and other large parts used in substation equipment and vehicle power supply devices. About.
[0002]
[Prior art]
The element cooler is formed by arranging a plurality of heat pipe heat sinks (hereinafter simply referred to as heat sinks). Conventionally, the heat pipe that is a component of the element cooler is a heat pipe as shown in FIG. 4, a plurality of radiating fins 5 are attached in a direction perpendicular to the heat receiving block 7 which is vertically attached to the heat generating body 6. Heat is transferred from the heat generating body 6 to the heat receiving block 7, The pipe 4 moves from the heat absorbing side to the heat radiating side and is released to the outside air through the heat radiating fins 5.
[0003]
In this heat sink 3, since the radiating fins 5 are attached at right angles to the heat pipes 4, the radiating fins 5 become horizontal when the heat sinks are installed so that the heat pipes 4 are vertical. In order to solve this difficulty, as shown in FIG. 5, there is a problem that the upward movement of the outside air warmed by the temperature rise is hindered and the convection is not smoothly performed and the heat dissipation efficiency of the heat sink is impaired. There has been proposed a heat sink 2 in which the pipes 4 are arranged vertically and have radiating fins 5 attached to the heat pipe 4 at an inclination (Japanese Patent Laid-Open No. 2000-283670).
[0004]
In the proposed heat sink 2, the radiating fins 5 are inclined and the heated outside air is likely to rise, so that convection is performed more smoothly. In some cases, the movement of the heated outside air, the convection, and the inflow of air into the radiating fins may not be sufficiently performed, and the radiating fins 5 directly receive heat from the heating elements 6 themselves moving upward. Therefore, the heat of the heat generating element 6 is transmitted to the heat receiving block 7, moves from the heat absorbing side of the heat pipe 4 to the heat radiating side, and is released to the outside air via the heat radiating fins 5. In order to remedy this problem, the inventors have arranged the heat pipe 4 so as to be inclined from the vertical direction as shown in FIG. Proposed a heat sink 1 which is mounted further inclined with respect to the inclination direction of the heat pipe 4.
[0005]
Even when a plurality of the above heat sinks composed of heat pipes with inclined radiating fins are arranged in parallel to form an element cooler, a heat receiving block that receives heat from a heating element, a heat pipe, a configuration of a heat sink composed of radiating fins, Since the cooling performance varies depending on the arrangement method of the heat sink, various combinations have been attempted. For example, as shown in FIG. 3, a pair of heat receiving blocks 7 attached with a heating element 6 such as a semiconductor element interposed therebetween. , 7 and a pair of heat receiving blocks 7, 7, which are composed of heat pipes 4, 4 protruding across the heating element 6, and radiating fins 5, 5 attached to the heat pipe, and the air flowing between the radiating fins is on the outside An element cooler 12 is proposed that flows out (Japanese Patent Laid-Open No. 2000-228880).
[0006]
[Problems to be solved by the invention]
The present invention relates to an element cooler in which a plurality of heat sinks composed of heat pipes with inclined radiating fins mounted in parallel, and in order to obtain further improved cooling performance, the configuration of the heat sink, the arrangement method of the heat sink As a result of repeated experiments and examinations on the relationship between the temperature and the cooling performance, the purpose is to facilitate the movement of warmed outside air, convection, and the inflow of new air into the radiating fins. Another object of the present invention is to provide an element cooler that can achieve further excellent heat dissipation efficiency.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, an element cooler according to claim 1 of the present invention is an element cooler comprising a heat sink, wherein the heat sink is attached to a pair of heat receiving blocks with a heating element interposed therebetween. Consists of one or more heat pipes facing each other across the heating element from the heat receiving block and projecting substantially parallel to each other, and heat radiating fins attached to the heat pipe, and the heat pipes are arranged in the vertical direction to dissipate heat. fins Rutotomoni mounted inclined downward outwardly from the heating side, above the heating element and a space is formed between the heat radiation fins.
[0008]
The element cooler according to claim 2 is an element cooler including a heat sink, and the heat sink is opposed to the pair of heat receiving blocks attached with the heating element interposed therebetween and the pair of heat receiving blocks with the heating element interposed therebetween. One or more heat pipes projecting substantially parallel to each other and heat radiating fins attached to the heat pipes, and the heat pipes facing each other and projecting substantially parallel to each other are maintained substantially parallel to each other from the vertical direction. are arranged inclined, Rutotomoni radiating fins are attached to be inclined downward toward the outside from the heating side, above the heating element and a space is formed between the heat radiation fins .
[0009]
An element cooler according to a third aspect is the element cooler according to the first aspect, wherein the radiating fin has an inclination angle of more than 0 ° and not more than 45 ° with respect to a direction perpendicular to the heat pipe.
[0010]
The element cooler according to a fourth aspect is the element cooler according to the first aspect, wherein the radiating fin is inclined at an angle of 5 ° to 30 ° with respect to a direction perpendicular to the heat pipe.
[0011]
The element cooler according to a fifth aspect is the element cooler according to the second aspect, wherein the radiating fin has an inclination angle of more than 0 ° and not more than 45 ° with respect to a direction perpendicular to the heat pipe, and the inclination angle of the heat pipe is The angle is more than 0 ° and 45 ° or less with respect to the vertical direction.
[0012]
An element cooler according to a sixth aspect is the element cooler according to the second aspect, wherein the radiating fin has an inclination angle of 5 ° to 30 ° with respect to a direction perpendicular to the heat pipe, and the inclination angle of the heat pipe is vertical. The angle is 0 ° to 30 ° with respect to the direction.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the element cooler according to the present invention will be described. Fig.1 (a) is a front view which shows the principal part of the element cooler based on 1st Embodiment, FIG.1 (b) is a side view similarly.
[0014]
In this embodiment, the heat sink constituting the element cooler 10 is opposed to the pair of heat receiving blocks 7A and 7B attached with the heating element 6 interposed therebetween and the pair of heat receiving blocks 7A and 7B with the heating element 6 interposed therebetween. Three heat pipes 4a1, 4b1, 4c1, 4a2, 4b2, 4c2 projecting substantially parallel to each other and heat radiation fins 5A, 5B attached to these heat pipes are formed. Heat pipes 4a1, 4b1, 4c1 and 4a2, 4b2 4c2 is arranged in the vertical direction, and the radiating fins 5A, 5B are attached downwardly from the side of the heating element 6 with an inclination of β from the direction perpendicular to the heat pipe.
[0015]
As shown in FIG. 1B, the heat sinks 10 </ b> A, 10 </ b> B, and 10 </ b> C having the above-described configuration are juxtaposed in the horizontal direction, and the element cooler 10 is configured. In the configuration of FIG. 1, the heat from the heating element 6 rises in the space between the radiation fins 5A and 5B, so that it is fresh in the direction of the arrow from between the radiation fins inclined downward toward the outside. Inflow of air can be promoted, the heat dissipation effect can be enhanced, and the cooling performance can be improved.
[0016]
In said embodiment, although the inclination angle (beta) of the radiation fin in a heat sink is selected according to a use aspect and an installation place, Preferably it is an angle of more than 0 degree and 45 degrees or less, More preferably, 5 degree-30 degrees It is more effective to increase the heat dissipation efficiency by promoting natural convection.
[0017]
Fig.2 (a) is a front view which shows the principal part of the element cooler based on 2nd Embodiment, FIG.2 (b) is a side view similarly.
[0018]
In this embodiment, the heat sink constituting the element cooler 11 is opposed to the pair of heat receiving blocks 7A and 7B and the pair of heat receiving blocks 7A and 7B that are attached with the heat generating element 6 interposed therebetween, with the heat generating element 6 interposed therebetween. Heat pipes 4a1, 4b1, 4c1 and 4a2, 4b2, 4c2 projecting substantially parallel to each other and radiating fins 5A, 5B attached to these heat pipes, heat pipes 4a1 projecting substantially parallel to each other, 4b1, 4c1 and 4a2, 4b2, 4c2 are arranged from the vertical direction while maintaining substantially parallel to each other, and in this embodiment, are inclined at an angle of α in the same direction, and the radiating fins 5A, 5B are arranged from the heating element 6 side. It is attached to be inclined downward by an angle β toward the outside.
[0019]
As shown in FIG. 2B, the heat sinks 11A, 11B, 11C, 11D, 11E, and 11F having the above-described configuration are arranged side by side in the horizontal direction to constitute the element cooler 11. In the configuration of FIG. 2, the heat from the heating element 6 rises in the space between the radiation fins 5A and 5B, and the freshness in the direction of the arrow from between the radiation fins inclined downward toward the outside. Inflow of air can be promoted, the heat dissipation effect can be enhanced, and the cooling performance can be improved.
[0020]
In this embodiment, the inclination angle α of the heat sink in the heat sink and the inclination angle β of the radiating fin are selected according to the use mode and the installation location, and α is preferably an angle of more than 0 ° and 45 ° or less, More preferably, the angle is in the range of 5 ° to 30 °, and β is preferably greater than 0 ° and not greater than 45 °, and more preferably in the range of 5 ° to 30 °. It is more effective to increase the heat dissipation efficiency.
[0021]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the element with the sufficient cooling efficiency which can perform the movement of the warm external air, convection, and the inflow of new air to a radiation fin more smoothly, and can achieve the further superior thermal radiation efficiency A cooler is provided.
[Brief description of the drawings]
FIG. 1 is a front view and a side view showing an embodiment of an element cooler of the present invention.
FIG. 2 is a front view and a side view showing another embodiment of the element cooler of the present invention.
FIG. 3 is a side view showing a conventional element cooler.
FIG. 4 is a side view of a heat sink in which a heat pipe and a radiation fin are inclined.
FIG. 5 is a side view of the heat sink in which the radiating fin is inclined.
FIG. 6 is a side view showing a conventional heat sink.
[Explanation of symbols]
1 heat sink 2 heat sink 3 heat sink 4 heat pipe 4a1 heat pipe 4b1 heat pipe 4c1 heat pipe 4a2 heat pipe 4b2 heat pipe 4c2 heat pipe 5 heat radiating fin 5A heat radiating fin 5B heat radiating fin 6 heating element 7 heat receiving block 7A heat receiving block 7B heat receiving block 10 element Cooler 10A heat sink 10B heat sink 10C heat sink 11 element cooler 11A heat sink 11B heat sink 11C heat sink 11D heat sink 11E heat sink 11F heat sink 12 heat sink

Claims (6)

An element cooler comprising a heat sink, wherein the heat sink is a pair of heat receiving blocks attached with the heating element sandwiched therebetween, and one pair projecting substantially parallel to each other across the heating element from the pair of heat receiving blocks more heat pipes and consists radiation fins attached to the heat pipe, the heat pipe is disposed vertically, radiating fins are attached to be inclined downward toward the outside from the heating side Rutotomoni, An element cooler characterized in that a space is formed between the heat dissipating fins above the heating element. An element cooler comprising a heat sink, wherein the heat sink is a pair of heat receiving blocks attached with the heating element sandwiched therebetween, and one pair projecting substantially parallel to each other across the heating element from the pair of heat receiving blocks The heat pipes including the heat pipes and the heat radiating fins attached to the heat pipes, the heat pipes that face each other and are substantially parallel to each other are disposed so as to be inclined from the vertical direction while being substantially parallel to each other. There device cooler and a space is formed between the heat radiation fins above the Rutotomoni, the heating element mounted to be inclined downwardly toward the outside from the heat generating side. 2. The element cooler according to claim 1, wherein an inclination angle of the radiating fin is greater than 0 ° and equal to or less than 45 ° with respect to a direction perpendicular to the heat pipe. The element cooler according to claim 1, wherein an inclination angle of the radiation fin is an angle of 5 ° to 30 ° with respect to a direction perpendicular to the heat pipe. The inclination angle of the heat radiating fin is an angle of more than 0 ° and not more than 45 ° with respect to a direction perpendicular to the heat pipe, and the inclination angle of the heat pipe is more than 0 ° and not more than 45 ° with respect to the vertical direction. The element cooler according to claim 2, wherein the element cooler is an angle. The inclination angle of the heat radiating fin is an angle of 5 ° to 30 ° with respect to a direction perpendicular to the heat pipe, and the inclination angle of the heat pipe is an angle of 0 ° to 30 ° with respect to the vertical direction. The element cooler according to claim 2.

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