JP4640429B2 - Small cooling fan - Google Patents

Small cooling fan Download PDF

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Publication number
JP4640429B2
JP4640429B2 JP2008073311A JP2008073311A JP4640429B2 JP 4640429 B2 JP4640429 B2 JP 4640429B2 JP 2008073311 A JP2008073311 A JP 2008073311A JP 2008073311 A JP2008073311 A JP 2008073311A JP 4640429 B2 JP4640429 B2 JP 4640429B2
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fan
heat
fan housing
air outlet
cooling
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JP2008182265A (en
JP2008182265A5 (en
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雅彦 平田
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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Description

本発明は、パーソナルコンピュータ、その他の電子機器におけるＭＰＵ等の発熱部品の放熱に用いる小型冷却ファンに関する。   The present invention relates to a small cooling fan used for heat radiation of a heat generating component such as an MPU in a personal computer or other electronic equipment.

一般に電気機器、たとえば、多機能、高性能のパーソナルコンピュータ等の小型の電子機器には、機能部品としてＭＰＵを用いているが、このＭＰＵは発熱し、約９０℃以上になると熱破壊することから、ＭＰＵに冷却装置を付設し、ＭＰＵで発生する熱を放熱して機器の安全を図るようにしている。前記冷却装置としては小型なものが要望されており、放熱フインをもつ通常の冷却モジュールでは十分な冷却ができない。したがって、図４の従来の冷却モジュールの一部切欠斜視図、および図５の同冷却モジュールの平面図に示すように小型冷却ファンを主構成部品とし、かつ、冷却モジュール化された冷却装置が用いられている。   In general, an MPU is used as a functional component in a small electronic device such as a multi-function, high-performance personal computer, for example. However, this MPU generates heat and is thermally destroyed when the temperature is about 90 ° C. or higher. In addition, a cooling device is attached to the MPU to dissipate the heat generated by the MPU so that the equipment is safe. The cooling device is required to be small, and a normal cooling module having a heat radiation fin cannot perform sufficient cooling. Therefore, as shown in the partially cutaway perspective view of the conventional cooling module in FIG. 4 and the plan view of the cooling module in FIG. 5, a cooling device having a small cooling fan as a main component and a cooling module is used. It has been.

この冷却装置は、導熱材料であるアルミダイカストよりなる筐体１と、その内部に回転ファン２をもつ偏平な冷却ファン３に対し、ＭＰＵ等の発熱部品４を接合した受熱部５を接合し、また、冷却ファン３の空気吹き出し側に放熱フインをもつ放熱部６を接合し、いわゆる冷却モジュール化された構成となっている。そして、冷却モジュールとしてヒートシンク作用と、発熱部品４の熱を伝えた放熱部６を回転ファン２の回転で生じる風で放熱部６のフインを強制冷却することにより、放熱・冷却するようにしている。
特開２０００−０９７１９１号公報 This cooling device joins a heat receiving part 5 in which a heat generating component 4 such as an MPU is joined to a casing 1 made of aluminum die casting, which is a heat conducting material, and a flat cooling fan 3 having a rotating fan 2 therein. Further, a heat radiating portion 6 having a heat radiating fin is joined to the air blowing side of the cooling fan 3 to form a so-called cooling module. As a cooling module, the heat sink function and the heat radiating portion 6 that has transmitted the heat of the heat generating component 4 are cooled and radiated and cooled by forcibly cooling the fins of the heat radiating portion 6 with wind generated by the rotation of the rotary fan 2 .
JP 2000-097191 A

ところで、近来のノート型パーソナルコンピュータ等は、画像処理等のためにＭＰＵ当における使用周波数が高くなっていることから、高い温度の発熱をするようになってきており、前記の冷却装置においては十分に冷却することができにくい。特に冷却ファンにおいては、その筐体の空気吹き出し口で風の逆流が生じやすいため、風量・静圧にロスがあって、放熱部のフインを十分に冷却できなく、したがって、画像処理等のために高い周波数を扱うＭＰＵ等の発熱部品の温度を大きく下げることができない。また、十分な冷却をするには大きな冷却ファンを用いなければならなく、ノート型パーソナルコンピュータ等の冷却装置として使用しにくい。   By the way, recent notebook type personal computers, etc., are generating high temperatures because the frequency used in the MPU is high for image processing and the like, and the above cooling device is sufficient. It is difficult to cool down. Especially in the cooling fan, since the backflow of the wind is likely to occur at the air outlet of the casing, there is a loss in the air volume and static pressure, and the fin of the heat radiating part cannot be cooled sufficiently. In particular, the temperature of heat-generating parts such as MPUs that handle high frequencies cannot be greatly reduced. In addition, a large cooling fan must be used for sufficient cooling, and it is difficult to use as a cooling device for a notebook personal computer or the like.

本発明は前記従来の問題に留意し、空気吹き出し口部において風の逆流が起こりにくく、風量・静圧のロスが小さい、そしてノート型パーソナルコンピュータ等の発熱部品の放熱に適した小型冷却ファンを提供することを目的とする。   The present invention takes into account the above-mentioned conventional problems, and a small cooling fan suitable for radiating heat from a heat generating component such as a notebook personal computer, in which backflow of wind does not easily occur at the air outlet, the loss of airflow and static pressure is small. The purpose is to provide.

そしてこの目的を達成するために本発明は、一側方に空気吹き出し口を有するファン筐体と、前記ファン筐体内に回転自在に設けられた回転ファン体と、前記ファン筐体の空気吹き出し口側に接合した放熱フイン部とを備え、前記回転ファン体の羽根の先端より外側の前記ファン筐体部分には、前記ファン筐体が有する前記空気吹き出し口に連なる逆流防止用の風洞部を形成し、前記ファン筐体における、前記風洞部の内高さ幅は、前記ファン筐体の前記回転ファン体用のファン室の内高さ幅よりも大きくし、前記風洞部は、前記ファン筐体の空気吸い込み口が設けられた面より上方の空間へ段差をもって形成し、前記空気吹き出し口から前記ファン筐体の側面に沿って前記回転ファン体の回転方向の逆方向に向けて連続したほぼＬ状であることにより初期の目的を達成するものである。 In order to achieve this object, the present invention provides a fan casing having an air outlet on one side, a rotating fan body rotatably provided in the fan casing, and an air outlet of the fan casing. And a heat dissipating fin portion joined to the side, and a fan channel portion for preventing a backflow connected to the air outlet of the fan housing is formed in the fan housing portion outside the tip of the blade of the rotating fan body. In the fan housing, the inner height width of the wind tunnel portion is larger than the inner height width of the fan chamber for the rotating fan body of the fan housing, and the wind tunnel portion is formed in the fan housing. A step is formed in a space above the surface where the air suction port is provided, and is substantially L continuous from the air outlet port along the side surface of the fan housing in the direction opposite to the rotation direction of the rotating fan body. is Jo It is intended to achieve the intended purpose by the.

以上のごとく本発明は、一側方に空気吹き出し口を有するファン筐体と、前記ファン筐体内に回転自在に設けられた回転ファン体と、前記ファン筐体の空気吹き出し口側に接合した放熱フイン部とを備え、前記回転ファン体の羽根の先端より外側の前記ファン筐体部分には、前記ファン筐体が有する前記空気吹き出し口に連なる逆流防止用の風洞部を形成し、前記ファン筐体における、前記風洞部の内高さ幅は、前記ファン筐体の前記回転ファン体用のファン室の内高さ幅よりも大きくし、前記風洞部は、前記ファン筐体の空気吸い込み口が設けられた面より上方の空間へ段差をもって形成し、前記空気吹き出し口から前記ファン筐体の側面に沿って前記回転ファン体の回転方向の逆方向に向けて連続したほぼＬ状であることを特徴とするものであるので、空気吹き出し口部において風の逆流が起こりにくく、風量・静圧のロスが小さい、そしてノート型パーソナルコンピュータ等の発熱部品の放熱に適したものとすることができる。 As described above, the present invention provides a fan casing having an air outlet on one side, a rotating fan body rotatably provided in the fan casing, and heat dissipation joined to the air outlet side of the fan casing. A fan channel portion for preventing a backflow that is connected to the air outlet of the fan housing is formed in the fan housing portion outside the tip of the blades of the rotating fan body. The inner height width of the wind tunnel portion in the body is larger than the inner height width of the fan chamber for the rotating fan body of the fan housing, and the air duct has an air suction port of the fan housing. A step is formed in a space above the provided surface , and is substantially L-shaped continuously from the air blowing port along the side surface of the fan housing in the direction opposite to the rotation direction of the rotating fan body. also features Since it is, backflow of the wind is less likely to occur in the air outlet mouth, air flow-static pressure loss is small, and can be made suitable for heat dissipation of the heat generating components such as a notebook personal computer.

以下、本発明の実施の形態について、図面を参照して説明する。
（実施の形態１） Embodiments of the present invention will be described below with reference to the drawings.
(Embodiment 1)

図１は本発明の実施の形態１の小型冷却ファンの斜視図、図２は同小型冷却ファンの平面図、図３（ａ）は図２におけるＡ−Ａ断面図、図３（ｂ）は図２におけるＢ−Ｂ断面図である。   1 is a perspective view of a small cooling fan according to a first embodiment of the present invention, FIG. 2 is a plan view of the small cooling fan, FIG. 3A is a cross-sectional view taken along line AA in FIG. 2, and FIG. It is BB sectional drawing in FIG.

図に示す本実施の形態１の冷却ファンは、冷却モジュール化されたものであり、ファン筐体７は熱伝導性のよいアルミダイカストにより偏平状の筐体として形成されており、その内部に羽根をもつ回転ファン体８をモータとともに回転自在に備え、一側方に空気吹き出し口９を設けている。また、ファン筐体７には、回転ファン体８の羽根の先端より外側に、空気吹き出し口９に連なる逆流防止用の風洞部１０を形成している。この逆流防止用の風洞部１０は、上から見ると回転ファン体８の空気吹き出し側およびその上流側の外側に沿い、かつ、連続したほぼＬ状の形状を有しており、そして、ファン筐体７が形成するファン室より内高さ幅を大きくしてある。   The cooling fan according to the first embodiment shown in the figure is a cooling module, and the fan housing 7 is formed as a flat housing by aluminum die casting having good thermal conductivity, and the blades are formed in the inside thereof. A rotating fan body 8 having a motor is provided so as to be rotatable together with a motor, and an air outlet 9 is provided on one side. Further, the fan casing 7 is formed with a wind tunnel portion 10 for preventing backflow that is continuous with the air outlet 9 outside the tip of the blades of the rotating fan body 8. When viewed from above, this wind tunnel portion 10 for preventing backflow is along the outside of the air blowing side of the rotating fan body 8 and the upstream side thereof, and has a continuous, substantially L-shaped shape. The inner height width is made larger than the fan chamber formed by the body 7.

また、前記ファン筐体７は、その外側に受熱部１１を連接してあり、受熱部１１にはＭＰＵ等の発熱部品１２を接合している。そしてファン筐体７の空気吹き出し口９側には、放熱フイン部１３を接合している。   The fan casing 7 has a heat receiving portion 11 connected to the outside thereof, and a heat generating component 12 such as an MPU is joined to the heat receiving portion 11. And the heat radiation fin part 13 is joined to the air outlet 9 side of the fan housing 7.

上記のように構成された本実施の形態１の冷却モジュール化された冷却ファンにおいて、発熱部品１２の熱が受熱部１１からファン筐体７を介して放熱フイン部１３に伝達され、回転ファン体８によって放熱フイン部１３を強制冷却することで効果的に熱交換作用が得られる。したがって、画像処理等のために高い周波数を扱い高い温度の発熱をするＭＰＵ等の発熱部品であっても、その温度を大きく下げて熱破壊を防止することができる。   In the cooling fan configured as the cooling module of the first embodiment configured as described above, the heat of the heat generating component 12 is transmitted from the heat receiving portion 11 to the heat radiating fin portion 13 via the fan housing 7, and the rotating fan body. The heat exchange action can be effectively obtained by forcibly cooling the radiating fin portion 13 by 8. Therefore, even for a heat-generating component such as an MPU that handles a high frequency and generates heat at a high temperature for image processing or the like, the temperature can be greatly reduced to prevent thermal destruction.

ここで、ファン筐体７は、回転ファン体８の羽根の先端より外側に、空気吹き出し口９に連なる逆流防止用の風洞部１０を形成しているため、そして、風洞部１０の内高さ幅をファン室の内高さ幅より大きくしてあるため、逆流防止用の風洞部１０によってファンの風路が確保されるとともに、ファン部より出る風は急激に広がった空間をもつ逆流防止用の風洞部１０で吹き出しが助成され、空気吹き出し口９よりファン部への風の逆流を防止する。このため、ファンにおける風量・静圧のロスが少なくなり、約１０％程度の風量・静圧特性を改善することができる。また、逆流防止用の風洞部１０を回転ファン体８の外側に沿ったほぼＬ状の形状にすることによって、前記風量・静圧特性をより良く改善することができる。このようにして、小型・高風量で、たとえばノート型パーソナルコンピュータ等の冷却に有用な冷却ファンを実現することができる。   Here, the fan housing 7 is formed with the wind tunnel portion 10 for preventing the backflow connected to the air outlet 9 outside the tip of the blades of the rotating fan body 8, and the inner height of the wind tunnel portion 10. Since the width is larger than the inner height width of the fan chamber, the air channel of the fan is secured by the wind tunnel portion 10 for preventing the backflow, and the wind coming out of the fan portion is used for preventing the backflow having a rapidly expanded space. The wind tunnel portion 10 is used to support the blowing, and the backflow of the wind from the air blowing port 9 to the fan portion is prevented. For this reason, the loss of the air volume / static pressure in the fan is reduced, and the air volume / static pressure characteristics of about 10% can be improved. Further, the air flow / static pressure characteristics can be further improved by making the wind tunnel portion 10 for preventing the backflow substantially L-shaped along the outside of the rotary fan body 8. In this way, it is possible to realize a cooling fan that is small and has a high air volume and is useful for cooling, for example, a notebook personal computer.

なお、前記モジュール化された冷却ファンにおいて、受熱部１１から放熱フイン部１３に熱をより有効に伝達するために、両者間にヒートパイプを用いてもよい。   In the modularized cooling fan, a heat pipe may be used between the heat receiving portion 11 and the heat radiating fin portion 13 in order to more effectively transfer heat.

以上のように、本発明によれば、パーソナルコンピュータなどの薄型の電子機器におけるＭＰＵ等の発熱部品の放熱に用いる小型冷却ファンに容易に適用できる。   As described above, according to the present invention, the present invention can be easily applied to a small cooling fan used for heat radiation of a heat-generating component such as an MPU in a thin electronic device such as a personal computer.

本発明の実施の形態１の小型冷却ファンの斜視図The perspective view of the small cooling fan of Embodiment 1 of this invention 同小型冷却ファンの平面図Top view of the small cooling fan （ａ）図２におけるＡ−Ａ断面図、（ｂ）図２におけるＢ−Ｂ断面図(A) AA sectional view in FIG. 2, (b) BB sectional view in FIG. 従来の冷却モジュールの一部切欠斜視図Partially cutaway perspective view of a conventional cooling module 同冷却モジュールの平面図Top view of the cooling module

７ ファン筐体
８ 回転ファン体
９ 空気吹き出し口
１０ 逆流防止用の風洞部
１１ 受熱部
１２ 発熱部品
１３ 放熱フイン部 DESCRIPTION OF SYMBOLS 7 Fan housing | casing 8 Rotating fan body 9 Air outlet 10 Wind tunnel part for backflow prevention 11 Heat receiving part 12 Heat-generating part 13 Radiation fin part

Claims (1)

一側方に空気吹き出し口を有するファン筐体と、前記ファン筐体内に回転自在に設けられた回転ファン体と、前記ファン筐体の空気吹き出し口側に接合した放熱フイン部とを備え、前記回転ファン体の羽根の先端より外側の前記ファン筐体部分には、前記ファン筐体が有する前記空気吹き出し口に連なる逆流防止用の風洞部を形成し、前記ファン筐体における、前記風洞部の内高さ幅は、前記ファン筐体の前記回転ファン体用のファン室の内高さ幅よりも大きくし、前記風洞部は、前記ファン筐体の空気吸い込み口が設けられた面より上方の空間へ段差をもって形成し、前記空気吹き出し口から前記ファン筐体の側面に沿って前記回転ファン体の回転方向の逆方向に向けて連続したほぼＬ状であることを特徴とする小型冷却ファン。 A fan housing having an air outlet on one side, a rotating fan body rotatably provided in the fan housing, and a heat dissipation fin portion joined to the air outlet side of the fan housing, A wind tunnel portion for preventing a backflow connected to the air outlet of the fan housing is formed in the fan housing portion outside the tip of the blades of the rotating fan body. The inner height width is larger than the inner height width of the fan chamber for the rotating fan body of the fan housing, and the wind tunnel portion is above the surface of the fan housing where the air suction port is provided. A small cooling fan formed in a space with a step and having a substantially L shape that is continuous from the air outlet along the side surface of the fan housing in the direction opposite to the rotational direction of the rotary fan body .
JP2008073311A 2008-03-21 2008-03-21 Small cooling fan Expired - Fee Related JP4640429B2 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10326986A (en) * 1997-05-23 1998-12-08 Nippon Keiki Seisakusho:Kk Fan motor
JP2000012751A (en) * 1998-06-24 2000-01-14 Nippon Densan Corp Cooling fan device
JP2000179492A (en) * 1998-12-18 2000-06-27 Nippon Keiki Seisakusho:Kk Thin centrifufal blowing fan

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10326986A (en) * 1997-05-23 1998-12-08 Nippon Keiki Seisakusho:Kk Fan motor
JP2000012751A (en) * 1998-06-24 2000-01-14 Nippon Densan Corp Cooling fan device
JP2000179492A (en) * 1998-12-18 2000-06-27 Nippon Keiki Seisakusho:Kk Thin centrifufal blowing fan

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