JP2009295826A - Cooling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling device which is capable of maintaining sufficient cooling efficiency for a long period of time by preventing clogging due to dust deposition on heat dissipation fins of a heat sink. <P>SOLUTION: The cooling device includes: a heat sink 3 being in contact with a heating element; a plurality of heat dissipation fins 4 mounted on the heat sink 3; a fan 2 for introducing cooling air to spaces between the plurality of heat dissipation fins 4; a comb-shaped dust removing component 5 which is mounted on top surface part of heat dissipation fins 4 at an inlet port of the cooling air from the fan 2 and is movable in spaces between the plurality of heat dissipation fins 4; a rack 6 coupled with the dust removing component 5; a rack 8 coupled with a button 7; and a gear 9 engaged with the rack 6 and the rack 8. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cooling device that conducts heat from a heat generating element to a heat sink having a plurality of radiating fins, and cools air by flowing into the heat sink. Technology.

  In recent years, with an increase in CPU performance due to an increase in computer speed, the power consumption and heat generation of the CPU have increased remarkably. For cooling a high heating element such as a CPU, a heat sink having a plurality of radiating fins and a fan for flowing cooling air between the radiating fins are used.

  Generally, in an environment where a computer is installed, dust floats in the air, and dust adheres when cooling air is applied to the radiating fins. Conventionally, in order to increase the surface area of the radiating fins and improve the cooling performance, the pitch of the radiating fins has become very narrow along with the high-density cooling design.

  Therefore, clogging due to dust is likely to occur on the heat radiation fins at the inlet of the cooling air to the heat sink, and the amount of cooling air flowing between the heat radiation fins is reduced. For this reason, there has been a problem that sufficient cooling efficiency cannot be maintained over a long period of time.

  Therefore, in order to solve such a problem, conventionally, for example, as described in JP-A-8-162787 (Patent Document 1), the space between the radiating fins in the high wind speed region is wide, and the low wind speed region is used. There has been a proposal of a heat sink with a fan in which the space between the radiating fins is narrowed.

Further, as described in Japanese Patent Application Laid-Open No. 2005-347450 (Patent Document 2), a heat sink in which a gap on the air inlet side is formed narrower than a gap on the outlet side during the heat radiation operation and provided on the outlet side during the maintenance operation. A dust adhesion preventing method has been devised in which dust accumulated on the inlet side can be discharged to the outside by causing the fan to rotate in the reverse direction and flowing air in the reverse direction.
JP-A-8-162787 JP 2005-347450 A

  In recent years, it has been necessary to increase the cooling efficiency of a heat sink with a fan due to an increase in the amount of heat generated by a CPU or the like. However, as described in Patent Document 1, the spacing between heat radiation fins at locations where clogging with dust is likely to occur is increased. As a result, there is a problem that the cooling efficiency is lowered.

  In addition, the structure disclosed in Patent Document 2 has a narrow gap on the air inlet side, so the amount of cooling air flowing into the heat sink is reduced, causing a decrease in cooling performance, and further, There is a problem in that dust tends to accumulate on the entrance side, and it becomes difficult to discharge the dust that has become snowball-type to the outside, further reducing the cooling performance.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a cooling device that can prevent clogging due to dust adhering to heat radiating fins of a heat sink and maintain sufficient cooling efficiency over a long period of time.

  The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

  Of the inventions disclosed in the present application, the outline of typical ones will be briefly described as follows.

  That is, the outline of a typical one is a comb-shaped dust removing component that is mounted on the upper surface portion of the heat radiating fin that is the entrance of the cooling air from the fan and that can move through the gap between the plurality of heat radiating fins, and the outer surface of the electronic device. And a moving part that moves the dust removing part by the back-and-forth operation of the button disposed on the screen.

  Among the inventions disclosed in the present application, effects obtained by typical ones will be briefly described as follows.

  That is, the effect obtained by the typical one can prevent clogging due to dust adhering to the radiating fin, and can maintain a sufficient cooling efficiency over a long period of time as a cooling device.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiment, and the repetitive description thereof will be omitted.

  The arrangement and configuration of the cooling device according to one embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a diagram showing an arrangement of a cooling device according to an embodiment of the present invention in an electronic device, FIG. 2 is a configuration diagram showing the configuration of the cooling device according to an embodiment of the present invention, and FIG. It is a block diagram which shows the structure of the dust removal part of the cooling device which concerns on one embodiment, and Fig.3 (a), (b) has shown the perspective view from a different direction.

  In FIG. 1, a cooling device 1 is arranged in an electronic device 100 to cool, for example, a CPU. For example, a button 7 is disposed on the outer surface of the electronic device 100, and the cooling device 1 pushes the button 7 to remove dust and the like in the cooling device 1.

  The button 7 has, for example, a spring or the like inside. The button 7 returns to its original state after the button is pressed by the force of the spring, and the button moves back and forth.

  In FIG. 2, a cooling device 1 is formed of a material having good thermal conductivity such as copper or aluminum, and includes a heat sink 3 in contact with a heating element such as a CPU, a plurality of heat radiation fins 4 protruding from the heat sink 3, and heat radiation. A comb-like dust removing part 5 for removing dust accumulated in the fins 4; a rack 6 coupled to the dust removing part 5; a rack 8 coupled to the button 7; a rack 6; and a gear 9 meshed with the rack 8. The fan 2 is configured to introduce wind into the radiating fins 4. The gear 9 includes a gear 91 and a gear 92 having different sizes.

  The rack 6, the rack 8, and the gear 9 constitute moving parts.

  As shown by the arrows in FIG. 2, the fan 2 takes in outside air from above the electronic device 100, introduces the intake air 10 toward the radiating fins 4, and becomes exhaust air 11 through the gaps between the radiating fins 4. The heat sink 3 is in contact with the heat generating element, and when the intake air 10 passes between the heat radiating fins 4, the heat sink 3 heated to high temperature by the heat of the heat generating element is cooled.

  The gap between the radiating fins 4 is appropriately determined in consideration of the surface area of the radiating fins 4, the degree of pressure loss, etc. in order to ensure the necessary cooling performance. Considering the cooling performance when the gap is changed, the gap between the fins is about 1.5 to 2 mm.

  In addition, a dust removing component 5 is installed between the radiating fins 4 and, as shown in FIG. 3, the dust removing component 5 has a thin comb shape, so that the intake air 10 is introduced between the radiating fins 4. It is designed not to interfere with the operation.

  Next, the dust removal operation of the cooling device according to the embodiment of the present invention will be described with reference to FIGS. 4A and 4B are explanatory diagrams for explaining the dust removing operation of the cooling device according to the embodiment of the present invention. FIG. 4A is a state before the button 7 is pressed, and FIG. The state after pressing 7 is shown. 5A and 5B are explanatory views for explaining the dust removal operation of the cooling device according to the embodiment of the present invention. FIG. 5A is a front view before starting dust removal, and FIG. 5B is a dust removal operation. A side view before the start is shown.

  In the conventional comparative example with respect to the present embodiment, there is no mechanism for removing dust like the dust removing component 5 between the fan 2 and the radiating fin 4. Therefore, the dust contained in the outside air adheres to the upper surface portion of the heat radiating fin 4 corresponding to the cooling wind advance inlet of the heat sink 3 and gradually accumulates with time. The accumulated dust obstructs the entrance of the cooling air from the upper surface of the radiating fin 4, and the cooling effect cannot be obtained.

  In the present embodiment, as shown in FIG. 4, each time the button 7 is pressed, the rack 8 coupled to the button 7 slides back and forth. The gear 9 includes two gears, a gear 91 on the rack 6 side and a gear 92 on the rack 8 side, and the gear 91 on the rack 6 side is larger than the gear 92 on the rack 8 side. 6 can be transmitted.

  From the state before pressing the button 7 shown in FIG. 4A to the state after pressing the button 7 shown in FIG. Can slide to the end of

  As shown in FIG. 5, when the outside air sucked from the fan 2 flows between the radiating fins 4, the contained dust 12 adheres to the radiating fins 4, but the dust mounted between the radiating fins 4. Since the removal component 5 slides back and forth, the dust 12 attached to the heat radiating fins 4 is removed.

  If the button 7 is shared with the power button, the dust removing component 5 slides back and forth each time the power button is pressed, and the dust 12 is removed.

  In the present invention, since the dust attached to the radiating fin 4 is removed by the dust removing component 5 that moves in conjunction with the button 7, clogging due to dust adhering to the radiating fin 4 can be prevented, and cooling is performed. Sufficient cooling efficiency as a device can be maintained over a long period of time.

  As mentioned above, the invention made by the present inventor has been specifically described based on the embodiment. However, the present invention is not limited to the embodiment, and various modifications can be made without departing from the scope of the invention. Needless to say.

  The present invention can be widely applied to a cooling device for electronic equipment that performs air cooling of a heating element.

It is a figure which shows arrangement | positioning in the electronic device etc. of the cooling device which concerns on one embodiment of this invention. It is a block diagram which shows the structure of the cooling device which concerns on one embodiment of this invention. (A), (b) is a block diagram which shows the structure of the dust removal part of the cooling device which concerns on one embodiment of this invention. (A), (b) is explanatory drawing for demonstrating the dust removal operation | movement of the cooling device which concerns on one embodiment of this invention. (A), (b) is explanatory drawing for demonstrating the dust removal operation | movement of the cooling device which concerns on one embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Cooling device, 2 ... Fan, 3 ... Heat sink, 4 ... Radiation fin, 5 ... Dust removal component, 6, 8 ... Rack, 7 ... Button, 9, 91, 92 ... Gear, 10 ... Intake air, 11 ... Exhaust Wind, 12 ... dust, 100 ... electronic equipment.

Claims (4)

A cooling device for cooling a heating element in an electronic device,
A heat sink in contact with the heating element;
A plurality of heat dissipating fins mounted on the heat sink;
A fan for introducing cooling air into the gap between the plurality of heat radiation fins;
A comb-like dust removing component mounted on an upper surface portion of the radiating fin corresponding to an entrance of the cooling air from the fan, and movable in a gap between the plurality of radiating fins;
A cooling device comprising: a moving part that moves the dust removing part by a back-and-forth operation of a button disposed on an outer surface of the electronic device. The cooling device according to claim 1, wherein
The moving part is
A first rack coupled to the dust removal component;
A second rack coupled to the button;
A cooling device, comprising: a gear engaged with the first rack and the second rack. The cooling device according to claim 2, wherein
The gear has a first gear and a second gear,
The first gear on the first rack side is larger than the second gear on the second rack side, and converts a short stroke of the button into a long stroke of the dust removing component. The cooling device according to any one of claims 1 to 3,
The cooling device according to claim 1, wherein the button is a power button of the electronic device.

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