JP2006301763A - Low-noise heat radiating device and heat radiating method for computer - Google Patents

Low-noise heat radiating device and heat radiating method for computer Download PDF

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JP2006301763A
JP2006301763A JP2005119435A JP2005119435A JP2006301763A JP 2006301763 A JP2006301763 A JP 2006301763A JP 2005119435 A JP2005119435 A JP 2005119435A JP 2005119435 A JP2005119435 A JP 2005119435A JP 2006301763 A JP2006301763 A JP 2006301763A
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fan
gate
electric gate
opening
main body
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Teng Chieh Liu
テン‐チー、リュー
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Giga Byte Technology Co Ltd
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Giga Byte Technology Co Ltd
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20136—Forced ventilation, e.g. by fans
    • H05K7/20172—Fan mounting or fan specifications
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/20—Cooling means
    • G06F1/206—Cooling means comprising thermal management
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

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  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Human Computer Interaction (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-noise heat radiating device and heat radiating method for computer, capable of effectively controlling the noise volume of a fan to reduce the influence of noise on a user. <P>SOLUTION: An electric gate and the fan are provided on a computer body, and a control circuit including a temperature controller is used to change the opening and closing degree of the electric gate and the rotating speed of the fan in accordance with the internal temperature of the computer body. According to this, when the internal temperature of the computer body is reduced, the opening and closing degree of the electric gate is reduced, and the fan rotating speed is reduced. Therefore, the probability of high noise received by the user can be relatively reduced, and the power consumption of the fan can be also relatively reduced. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明はコンピュータ本体の放熱技術及び装置に関し、詳細には、低騒音・低消費電力の放熱装置及び放熱方法に関する。   The present invention relates to a heat dissipation technique and apparatus for a computer main body, and particularly relates to a heat dissipation apparatus and a heat dissipation method with low noise and low power consumption.

従来のコンピュータ本体の背面パネルには後部ファンが設置されており、コンピュータ本体内部で動作により発生する熱を排出するために用いられている。近年、ＣＰＵの消費電力が大幅に上がっているため、コンピュータ本体の前面パネルにも前部ファンを追加設置するものもある。   A rear fan is installed on the rear panel of a conventional computer main body, and is used to exhaust heat generated by operation inside the computer main body. In recent years, the power consumption of CPUs has increased significantly, and there is also a case where a front fan is additionally installed on the front panel of the computer main body.

しかし、この後部ファンまたは前部ファンのどちらにしても、その運転時には常に騒音が発生し、且つ、この騒音は何の隔離措置もなく直接使用者の耳に伝わるため、静かさが妨害され、作業時の気分に影響するだけでなく、長期的には使用者の聴力が損なわれる場合もある。   However, with either this rear fan or the front fan, noise is always generated during operation, and since this noise is transmitted directly to the user's ear without any isolation measures, quietness is disturbed, Not only does it affect the mood at work, but also the hearing of the user may be impaired in the long run.

そこで、本発明の目的の1つは、ファンの騒音量を制御し、使用者が受ける騒音による影響を低減可能なコンピュータに用いる低騒音の放熱装置及び放熱方法置を提供することにある。   Accordingly, one of the objects of the present invention is to provide a low-noise heat dissipation device and a heat dissipation method device used in a computer that can control the noise amount of a fan and reduce the influence of noise received by a user.

本発明の1つの観点としての放熱装置は、電動ゲート及びファンをコンピュータ本体に設置し、且つ、この電動ゲートの開閉度を条件に伴って変化させる。例えばコンピュータ本体の内部温度に合わせて変化させたり、ファンの実際の回転速度に合わせて変化させたりすることで、コンピュータ本体の内部温度またはファンの実際の回転速度が低下すると、電動ゲートの開閉度が小さくなり、それに伴いファンが発生する騒音も低くすることができる。   In a heat dissipation device as one aspect of the present invention, an electric gate and a fan are installed in a computer main body, and the degree of opening and closing of the electric gate is changed according to conditions. For example, if the internal temperature of the computer body or the actual rotation speed of the fan decreases by changing it according to the internal temperature of the computer body or the actual rotation speed of the fan, the degree of opening and closing of the electric gate As a result, the noise generated by the fan can be reduced.

このほか、この電動ゲートの開閉度がコンピュータ本体の内部温度に合わせて変化する例においては、さらにファンの回転速度もコンピュータ本体の内部温度に合わせて変化させることもできる。これにより、コンピュータ本体の内部温度が低くなると、電動ゲートの開閉度が小さくなり、且つ、ファンの回転速度が低くなるのに伴い、ファンが発生する騒音も低くすることができる。   In addition, in the example in which the degree of opening and closing of the electric gate changes in accordance with the internal temperature of the computer main body, the rotation speed of the fan can also be changed in accordance with the internal temperature of the computer main body. As a result, when the internal temperature of the computer main body is lowered, the degree of opening and closing of the electric gate is reduced, and the noise generated by the fan can be reduced as the rotational speed of the fan is reduced.

本発明によれば、コンピュータ本体の内部温度またはファンの実際の回転速度の低下に伴いファンが発生する騒音も低くなるため、使用者が受ける騒音による影響が低減し、使用者に対するファンの騒音による悪影響が改善される。   According to the present invention, the noise generated by the fan is reduced as the internal temperature of the computer main body or the actual rotational speed of the fan is reduced, so that the influence of the noise received by the user is reduced, and the fan noise to the user is reduced. Adverse effects are improved.

加えて、コンピュータ本体の内部温度の下降に伴いファンの回転速度が低下するとき、ファンの消費電力も低下するため、電力が節約される。   In addition, when the rotation speed of the fan decreases as the internal temperature of the computer main body decreases, the power consumption of the fan also decreases, so that power is saved.

以下、本発明の実施例について図面を参照しながら説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１に示すように、コンピュータ本体１の前面パネル１０に通風孔１１を形成し、この通風孔１１内に電動ゲート２を設置する。この電動ゲート２は、通風孔１１内に固定されたフレーム２０と、このフレーム２０の対辺に相互に平行且つそれぞれ回動可能に跨設された複数の放熱フィン２１と、モータ及び伝動部材一組を含む駆動装置（不図示）を含み、このモータが伝動部材の伝動を介し複数の放熱フィン２１を同時に回動させる。   As shown in FIG. 1, a ventilation hole 11 is formed in the front panel 10 of the computer main body 1, and the electric gate 2 is installed in the ventilation hole 11. The electric gate 2 includes a frame 20 fixed in the ventilation hole 11, a plurality of heat radiation fins 21 extending in parallel with each other on opposite sides of the frame 20, and a set of a motor and a transmission member. The motor rotates a plurality of heat radiation fins 21 simultaneously through the transmission of the transmission member.

また、図２に示すように、コンピュータ本体１内部にファン３を設置し、このファン３は電動ゲート２が開くとき、回転して気流を発生する。図中に矢印で示すように、この気流はコンピュータ本体１内部から電動ゲート２を経て外部へ向かって流動する。そのうち、各放熱フィン２１が水平位置まで回動すると、電動ゲート２の全開状態、即ち、電動ゲート２の開閉度が９０度の状態が形成される。   As shown in FIG. 2, a fan 3 is installed inside the computer main body 1, and this fan 3 rotates to generate an airflow when the electric gate 2 is opened. As indicated by arrows in the figure, this airflow flows from the inside of the computer main body 1 to the outside through the electric gate 2. Among these, when each radiating fin 21 rotates to the horizontal position, the fully opened state of the electric gate 2, that is, a state where the open / close degree of the electric gate 2 is 90 degrees is formed.

さらに、図３に示すように、各放熱フィン２１が傾斜約４５度の位置まで回動すると、電動ゲート２の半開状態、即ち、電動ゲート２の開閉度が４５度の状態が形成される。   Further, as shown in FIG. 3, when each radiating fin 21 is rotated to a position where the inclination is about 45 degrees, a half-open state of the electric gate 2, that is, a state where the open / close degree of the electric gate 2 is 45 degrees is formed.

図４に示すように、隣接する２枚の放熱フィン２１の一部が重なり合うとき、電動ゲート２が全閉状態、即ち、電動ゲート２の開閉度が０度の状態が形成される。このとき同時に、ファン３は運転を停止する。   As shown in FIG. 4, when a part of two adjacent radiating fins 21 overlaps, the electric gate 2 is in a fully closed state, that is, a state in which the opening / closing degree of the electric gate 2 is 0 degree is formed. At the same time, the fan 3 stops operating.

このように本実施例では、電動ゲート２の開閉度は０度（全閉）から９０度（全開）の間で変化することができ、且つ、この電動ゲート２の開閉度が小さければ小さいほど、ファン３の運転時に発生する騒音の隔離効果が高くなる。このため、コンピュータ本体１にこの電動ゲート２及びファン３を設置し、この電動ゲート２の開閉度をコンピュータ本体１の内部温度に合わせて変化させるだけ（コンピュータ本体１の内部温度に応じて電動ゲート２を開閉制御して、通風孔１１の開口率を変化させること）で、コンピュータ本体１の内部温度が低い時は、ファン３が発生する騒音を対応して低くすることができる。またこのとき同時に、コンピュータ本体１の内部温度の低下に合わせてさらにファン３の回転速度を低下させると、騒音がより低くなるだけでなく、ファン３の消費電力も低くなるため、節電効果も得られる。   As described above, in this embodiment, the opening / closing degree of the electric gate 2 can be changed between 0 degree (fully closed) and 90 degrees (fully opened), and the smaller the opening degree of the electric gate 2 is, the smaller the opening degree is. The effect of isolating noise generated during operation of the fan 3 is enhanced. For this reason, the electric gate 2 and the fan 3 are installed in the computer main body 1, and the degree of opening and closing of the electric gate 2 is changed according to the internal temperature of the computer main body 1 (the electric gate according to the internal temperature of the computer main body 1). When the internal temperature of the computer main body 1 is low, the noise generated by the fan 3 can be correspondingly reduced. At the same time, if the rotational speed of the fan 3 is further decreased in accordance with the decrease in the internal temperature of the computer main body 1, not only the noise will be reduced, but also the power consumption of the fan 3 will be reduced. It is done.

図５に制御回路４のダイアグラムを示す。この制御回路４は、コンピュータ本体１内部に設置され、コンピュータ本体１の内部温度を検知するための温度センサ４０と、電動ゲート２を駆動するためのゲート駆動回路４１と、ファン３を駆動するためのファン駆動回路４２と、温度センサ４０の検知結果及び予め定義（メモリ等に記憶）されたデータテーブル（対照表）に基づき、電動ゲート２の開閉度及びファン３の回転速度を制御するマイクロプロセッサ４３とを含む。   FIG. 5 shows a diagram of the control circuit 4. The control circuit 4 is installed inside the computer main body 1, and a temperature sensor 40 for detecting the internal temperature of the computer main body 1, a gate drive circuit 41 for driving the electric gate 2, and a fan 3 are driven. And a microprocessor that controls the opening / closing degree of the electric gate 2 and the rotational speed of the fan 3 based on the detection result of the temperature sensor 40 and a data table (reference table) defined in advance (stored in a memory or the like). 43.

また、このデータテーブルには主に複数の温度区間、複数のゲート開閉度及び複数のファン回転速度が定義（記憶）され、且つ、各ゲート開閉度を１つの温度区間にそれぞれ対応させ、各ファン回転速度も１つの温度空間にそれぞれ対応している。表1は、この対照表の例の１つである。   The data table mainly defines (stores) a plurality of temperature sections, a plurality of gate opening / closing degrees and a plurality of fan rotation speeds, and each gate opening / closing degree corresponds to one temperature section. The rotation speed also corresponds to one temperature space. Table 1 is one example of this comparison table.

Figure 2006301763
Figure 2006301763

そして、マイクロプロセッサ４３がコンピュータ本体１の内部温度を取得した後、この対照表に基づきその内部温度に対応するゲート開閉度及びファン回転速度を読み込み、電動ゲート２を制御してその対応するゲート開閉度まで回動させると共に、ファン３を制御してその対応するファン回転速度で回転させる。例えば、温度センサ４０が検知するコンピュータ本体１の内部温度が３８℃の場合、この対照表に基づき、マイクロプロセッサ４３がゲート駆動回路４１を介し電動ゲート２を図３に示すように４５度の位置まで回動させ、同時に、マイクロプロセッサ４３がファン駆動回路４２を介し、ファン３を１８００rpmの回転速度で運転させる。   Then, after the microprocessor 43 acquires the internal temperature of the computer main body 1, the gate opening degree and the fan rotation speed corresponding to the internal temperature are read based on the comparison table, and the electric gate 2 is controlled to control the corresponding gate opening / closing. And the fan 3 is controlled to rotate at the corresponding fan rotation speed. For example, when the internal temperature of the computer main body 1 detected by the temperature sensor 40 is 38 ° C., the microprocessor 43 moves the electric gate 2 through the gate drive circuit 41 at a position of 45 degrees as shown in FIG. At the same time, the microprocessor 43 causes the fan 3 to operate at a rotational speed of 1800 rpm via the fan drive circuit 42.

また、電動ゲート２の開閉度をコンピュータ本体１の内部温度に応じて変化させるのではなく、電動ゲート２の開閉度をファン３の実際に回転している回転速度に応じて変化させるように構成してもよい。例えば、表１において、温度センサ４０が検知するコンピュータ本体１の内部温度が３３℃の場合、マイクロプロセッサ４３がファン駆動回路４２を介し、ファン３を９００rpmの回転速度で運転させ、その後、このファン３の回転速度に応じて、マイクロプロセッサ４３がゲート駆動回路４１を介し電動ゲート２を１５度の位置まで回動させる。   The opening / closing degree of the electric gate 2 is not changed according to the internal temperature of the computer main body 1, but the opening / closing degree of the electric gate 2 is changed according to the rotational speed of the fan 3 actually rotating. May be. For example, in Table 1, when the internal temperature of the computer main body 1 detected by the temperature sensor 40 is 33 ° C., the microprocessor 43 causes the fan 3 to operate at a rotational speed of 900 rpm via the fan drive circuit 42, and then this fan The microprocessor 43 rotates the electric gate 2 to a position of 15 degrees via the gate drive circuit 41 in accordance with the rotation speed 3.

このほか、図５に示すように、ディスプレイ装置５を設けてもよく、このディスプレイ装置５は、コンピュータ本体１の前面パネル１０に設置し、且つ、制御回路４のマイクロプロセッサ４３に接続し、コンピュータ本体１の内部温度の表示に用いる。必要に応じ、このディスプレイ装置５に電動ゲート２の開閉度やファン３の実際回転速度等、電動ゲート２及びファン３の動作状態を表示するようにしてもよい。   In addition, as shown in FIG. 5, a display device 5 may be provided. The display device 5 is installed on the front panel 10 of the computer main body 1 and connected to the microprocessor 43 of the control circuit 4, and the computer. Used to display the internal temperature of the main body 1. If necessary, the operating state of the electric gate 2 and the fan 3 such as the opening / closing degree of the electric gate 2 and the actual rotation speed of the fan 3 may be displayed on the display device 5.

上述の説明から誰でも充分に教導を得られ、且つ、本実施例はコンピュータ本体の放熱の必要を満たし、さらに使用者が受ける高騒音の確率を減少することができることが分かる。   From the above description, it can be seen that anyone can sufficiently obtain guidance, and this embodiment can satisfy the need for heat dissipation of the computer main body and further reduce the probability of high noise received by the user.

本発明の実施例に基づく立体外観図である。It is a three-dimensional external view based on the Example of this invention. 本発明の実施例に基づく電動ゲートの動作（全開）を示す側面図である。It is a side view which shows the operation | movement (full open) of the electric gate based on the Example of this invention. 本発明の実施例に基づく電動ゲートの動作（半開）を示す側面図である。It is a side view which shows the operation | movement (half-opening) of the electric gate based on the Example of this invention. 本発明の実施例に基づく電動ゲートの動作（全閉）を示す側面図である。It is a side view which shows operation | movement (fully closed) of the electric gate based on the Example of this invention. 本発明の実施例に基づく制御回路の構成ブロック図である。It is a block diagram of the configuration of a control circuit based on an embodiment of the present invention.

符号の説明Explanation of symbols

１ コンピュータ本体
１０ 前面パネル
１１ 通風孔
２ 電動ゲート
２０ フレーム
２１ 複数の放熱フィン
３ ファン
４ 制御回路
４０ 温度センサ
４１ ゲート駆動回路
４２ ファン駆動回路
４３ マイクロプロセッサ
５ ディスプレイ装置

DESCRIPTION OF SYMBOLS 1 Computer main body 10 Front panel 11 Ventilation hole 2 Electric gate 20 Frame 21 Several radiation fin 3 Fan 4 Control circuit 40 Temperature sensor
41 Gate Drive Circuit 42 Fan Drive Circuit 43 Microprocessor 5 Display Device

Claims (6)

電動ゲート及びファンをコンピュータ本体に設置し、複数の温度区間及び複数のゲート開閉度を定義して各温度区間を１つのゲート開閉度に対応させ、該コンピュータ本体の内部温度を取得した後、該内部温度が属する温度区間を見つけ、該電動ゲートを駆動し、該電動ゲートの開閉度等を該温度区間が対応するゲート開閉度とする、コンピュータ用低騒音放熱方法。   An electric gate and a fan are installed in the computer main body, a plurality of temperature sections and a plurality of gate opening / closing degrees are defined, and each temperature section is associated with one gate opening / closing degree, and the internal temperature of the computer main body is acquired. A low noise heat radiation method for a computer, wherein a temperature section to which an internal temperature belongs is found, the electric gate is driven, and the degree of opening / closing of the electric gate is set to the degree of gate opening / closing corresponding to the temperature section. 前記複数の温度区間及び複数のゲート開閉度の定義手順が、さらに複数のファン回転速度の定義を含み、且つ、各温度区間を１つのゲート開閉度及び１つのファン回転速度に対応させ、該電動ゲートの駆動手順がさらに該ファンの駆動を含み、該ファンの回転速度を該温度区間が対応するファン回転速度に等しくする、請求項１に記載のコンピュータ用低騒音放熱方法。   The definition procedure of the plurality of temperature sections and the plurality of gate opening / closing degrees further includes a plurality of fan rotation speed definitions, and each temperature section is associated with one gate opening / closing degree and one fan rotation speed, The low noise heat radiation method for a computer according to claim 1, wherein the driving procedure of the gate further includes driving of the fan, and the rotation speed of the fan is equal to the fan rotation speed corresponding to the temperature section. ファンを備えたコンピュータ本体に電動ゲートを設置し、複数のファン回転速度及び複数のゲート開閉度を定義し、各ゲート開閉度を１つのファン回転速度に対応させ、該ファンの実際の回転速度を取得した後、該実際の回転速度が属するファン回転速度を見つけ、該電動ゲートを駆動し、該電動ゲートの開閉度を該ファン回転速度が対応するゲート開閉度に等しくする、コンピュータ用低騒音放熱方法。   An electric gate is installed in the computer body equipped with a fan, a plurality of fan rotation speeds and a plurality of gate opening / closing degrees are defined, each gate opening / closing degree corresponds to one fan rotation speed, and the actual rotation speed of the fan is determined. After obtaining, the fan rotation speed to which the actual rotation speed belongs is found, the electric gate is driven, and the opening / closing degree of the electric gate is made equal to the gate opening / closing degree corresponding to the fan rotation speed. Method. 電動ゲートと、ファンと、制御回路を含み、該電動ゲートはコンピュータ本体に固定され、該ファンはコンピュータ本体内部に設置され、該電動ゲートが開いたとき該ファンの気流がコンピュータ本体内部と外部の間で流動し、該制御回路は該コンピュータ本体内部に設置され、該電動ゲートの一部品を検知・駆動して検知結果に基づき該電動ゲートの開閉度を制御し、そのうち、該制御回路がコンピュータ本体の内部温度を検知するための温度センサと、電動ゲートを駆動するためのゲート駆動回路と、該温度センサの検知結果に基づき該ゲート駆動回路を制御し、該電動ゲートを駆動して対応する開閉度とするマイクロプロセッサとを含む、コンピュータ用低騒音放熱装置。   An electric gate, a fan, and a control circuit, the electric gate being fixed to the computer main body, the fan being installed inside the computer main body, and when the electric gate is opened, The control circuit is installed inside the computer main body, detects and drives one part of the electric gate, and controls the degree of opening and closing of the electric gate based on the detection result. A temperature sensor for detecting the internal temperature of the main body, a gate drive circuit for driving the electric gate, and controlling the gate drive circuit based on the detection result of the temperature sensor, and driving the electric gate A low noise heat radiating device for a computer, including a microprocessor for opening and closing. 電動ゲートと、ファンと、制御回路を含み、該電動ゲートはコンピュータ本体に固定され、該ファンはコンピュータ本体内部に設置され、該電動ゲートが開いたとき該ファンの気流がコンピュータ本体内部と外部の間で流動し、該制御回路は該コンピュータ本体内部に設置され、該電動ゲートの一部品を検知・駆動して検知結果に基づき該電動ゲートの開閉度を制御し、そのうち、該制御回路がコンピュータ本体の内部温度を検知するための温度センサと、電動ゲートを駆動するためのゲート駆動回路と、該ファンを駆動するためのファン駆動回路と、該温度センサの検知結果に基づき該ゲート駆動回路を制御し、該電動ゲートを駆動して対応する開閉度とすると共に、ファイファン駆動回路を制御し、該ファンを対応する回転速度とするマイクロプロセッサとを含む、コンピュータ用低騒音放熱装置。   An electric gate, a fan, and a control circuit, the electric gate being fixed to the computer main body, the fan being installed inside the computer main body, and when the electric gate is opened, The control circuit is installed inside the computer main body, detects and drives one part of the electric gate, and controls the degree of opening and closing of the electric gate based on the detection result. A temperature sensor for detecting the internal temperature of the main body, a gate drive circuit for driving the electric gate, a fan drive circuit for driving the fan, and the gate drive circuit based on the detection result of the temperature sensor Control and drive the electric gate to the corresponding opening / closing degree, and control the phi fan drive circuit to set the fan to the corresponding rotational speed. Black and a processor, low noise heat dissipation device for a computer. 前記電動ゲートが、通風孔内に固定されたフレームと、該フレームの２つの対辺にそれぞれ相互に平行且つ回動可能に跨設された複数の放熱フィンと、モータ及び一組の伝動部品を含む駆動装置を含み、該モータが該伝動部品の伝動を介し該放熱フィンを同時に回動させる、請求項４または５に記載のコンピュータ用低騒音放熱装置。


The electric gate includes a frame fixed in the ventilation hole, a plurality of heat dissipating fins extending in parallel with each other on two opposite sides of the frame, a motor, and a set of transmission parts. The low-noise heat-dissipating device for a computer according to claim 4, further comprising a driving device, wherein the motor simultaneously rotates the heat-dissipating fins through transmission of the power transmission component.


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US8226350B2 (en) 2007-04-17 2012-07-24 Nidec Corporation Fan apparatus
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