TWI426181B - Fan cooling system and electronic device using the system - Google Patents

Fan cooling system and electronic device using the system Download PDF

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Publication number
TWI426181B
TWI426181B TW98128917A TW98128917A TWI426181B TW I426181 B TWI426181 B TW I426181B TW 98128917 A TW98128917 A TW 98128917A TW 98128917 A TW98128917 A TW 98128917A TW I426181 B TWI426181 B TW I426181B
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Taiwan
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air outlet
fan
electronic device
sound
top plate
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TW98128917A
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Chinese (zh)
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TW201107606A (en
Inventor
Zhi Bin Guan
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Hon Hai Prec Ind Co Ltd
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Description

風扇散熱系統及採用該系統之電子裝置 Fan cooling system and electronic device using the same

本發明是關於一種風扇散熱系統及採用該系統的電子裝置。 The present invention relates to a fan heat dissipation system and an electronic device using the same.

為了防止噪音危害,業界制定了嚴格的聲音品質規範來規範各種產品的聲音品質。在規範中,響度(Loudness)、音調(Tonality)、變動噪音強度(Modulations Strength)等,均是重要的指標。 In order to prevent noise hazards, the industry has established strict sound quality specifications to regulate the sound quality of various products. In the specification, Loudness, Tonality, Modulations Strength, etc. are important indicators.

在電子裝置,如電腦中,通常會裝設風扇以滿足散熱需要。風扇會使空氣流動從而達到散熱目地,但同時也會產生氣動噪音從而對人體產生不利影響。其中,變動噪音強度是影響氣動噪音的主要指標。 In electronic devices, such as computers, fans are usually installed to meet the need for heat dissipation. The fan will cause air to flow to achieve heat dissipation, but it will also generate aerodynamic noise that can adversely affect the human body. Among them, the variable noise intensity is the main indicator affecting the aerodynamic noise.

鑒於以上,有必要提供一種可減弱氣動噪音的風扇散熱系統。 In view of the above, it is necessary to provide a fan cooling system that can attenuate aerodynamic noise.

一種電子裝置,包括一基座、一裝設於該基座內的風扇、一氣流導罩以及一蓋合於該基座的頂板,該基座包括一與該頂板相對的底板以及由該底板的相對兩端分別延伸至該頂板的一前板及一後板,該前板開設一系統入風口,該後板開設一系統出風口,該風 扇包括一朝向該系統入風口的風扇入風口以及一朝向該系統出風口的風扇出風口,該頂板鄰接該風扇出風口開設一減音出風口,該氣流導罩位於該風扇出風口與該系統出風口之間,且該氣流導罩一端鄰接該風扇出風口,該氣流導罩包括一頂板,該氣流導罩的頂板的鄰接該風扇出風口的一端開設一凹槽。 An electronic device includes a base, a fan mounted in the base, an airflow guide cover, and a top plate covering the base, the base includes a bottom plate opposite to the top plate, and the bottom plate The opposite ends extend to a front panel and a rear panel of the top panel, the front panel defines a system air inlet, and the rear panel defines a system air outlet, the wind The fan includes a fan air inlet opening toward the air inlet of the system and a fan air outlet facing the air outlet of the system, the top plate is adjacent to the fan air outlet to open a sound reduction air outlet, the air flow guide is located at the fan air outlet and the system Between the air outlets, and one end of the airflow guide is adjacent to the air outlet of the fan, the airflow guide includes a top plate, and a recess of the top of the airflow guide that abuts the air outlet of the fan defines a recess.

該減音出風口的設置,可以減小風扇出風口處的氣壓梯度變化,從而達到減弱氣動噪音的目地。 The setting of the sound reduction air outlet can reduce the pressure gradient change at the fan air outlet, thereby achieving the purpose of reducing the aerodynamic noise.

10、10A、10B‧‧‧電子裝置 10, 10A, 10B‧‧‧ electronic devices

20‧‧‧外殼 20‧‧‧ Shell

70、70B‧‧‧風扇 70, 70B‧‧‧ fan

30‧‧‧基座 30‧‧‧Base

50、50A、50B、91B‧‧‧頂板 50, 50A, 50B, 91B‧‧‧ top board

31、31A、31B‧‧‧底板 31, 31A, 31B‧‧‧ bottom plate

33‧‧‧側板 33‧‧‧ side panels

35‧‧‧前板 35‧‧‧ front board

37‧‧‧後板 37‧‧‧ Back panel

370‧‧‧系統入風口 370‧‧‧System inlet

350、350B‧‧‧系統出風口 350, 350B‧‧‧ system air outlet

310、500、500A、500B‧‧‧減音出風口 310, 500, 500A, 500B‧‧‧ reduction sound outlet

311、501‧‧‧通孔 311, 501‧‧‧through holes

71‧‧‧風扇入風口 71‧‧‧fan inlet

73‧‧‧風扇出風口 73‧‧‧fan outlet

90B‧‧‧氣流導罩 90B‧‧‧air guide

910B‧‧‧凹槽 910B‧‧‧ Groove

圖1是本發明電子裝置第一實施方式的立體圖。 1 is a perspective view of a first embodiment of an electronic device of the present invention.

圖2是圖1中電子裝置的立體分解圖。 2 is an exploded perspective view of the electronic device of FIG. 1.

圖3是本發明電子裝置第二實施方式的立體分解圖。 3 is an exploded perspective view of a second embodiment of the electronic device of the present invention.

圖4是本發明電子裝置第三實施方式的立體分解圖。 4 is an exploded perspective view of a third embodiment of the electronic device of the present invention.

請參照圖1與圖2,在本發明的第一實施方式中,電子裝置10包括一外殼20以及三個裝設於外殼20內的風扇70。 Referring to FIG. 1 and FIG. 2, in the first embodiment of the present invention, the electronic device 10 includes a casing 20 and three fans 70 mounted in the casing 20.

外殼20包括一基座30以及一蓋合於基座30的頂板50。基座30包括一底板31、由底板31相對兩側分別垂直向上延伸出的兩側板33以及由底板31相對兩端分別垂直向上延伸出的一前板35與一後板37。後板37上開設複數通風孔以形成系統入風口370。前板35上開設複數通風孔以形成系統出風口350。底板31上設有三個減音出風口310。每一減音出風口310包括開設於底板31的五個圓形通孔311。該等通孔311呈“一”字形排列,且排列方向平行於前板35 及後板37。頂板50與底板31相對設置。頂板50上設有三個減音出風口500。每一減音出風口500包括呈“一”字形排列的五個圓形通孔501。當頂板50蓋合至基座30時,該等減音出風口500在底板31上的正投影分別與該等減音出風口310重合。 The outer casing 20 includes a base 30 and a top plate 50 that covers the base 30. The base 30 includes a bottom plate 31, two side plates 33 extending vertically upward from opposite sides of the bottom plate 31, and a front plate 35 and a rear plate 37 extending vertically upward from opposite ends of the bottom plate 31, respectively. A plurality of vent holes are formed in the rear plate 37 to form a system air inlet 370. A plurality of vent holes are formed in the front plate 35 to form a system air outlet 350. Three sound-reducing air outlets 310 are provided on the bottom plate 31. Each of the sound-reducing air outlets 310 includes five circular through holes 311 opened in the bottom plate 31. The through holes 311 are arranged in a "one" shape, and the arrangement direction is parallel to the front plate 35. And the rear plate 37. The top plate 50 is disposed opposite to the bottom plate 31. Three sound reduction air outlets 500 are provided on the top plate 50. Each of the sound-reducing air outlets 500 includes five circular through holes 501 arranged in a "one" shape. When the top plate 50 is closed to the base 30, the orthographic projections of the sound-reducing air outlets 500 on the bottom plate 31 respectively coincide with the sound-reducing air outlets 310.

風扇70並排安裝於基座30內。每一風扇70包括相對設置的一風扇入風口71以及一風扇出風口73。安裝風扇70時,風扇70位於減音出風口310與系統入風口370之間,風扇入風口71朝向系統入風口370,風扇出風口73朝向系統出風口350,且風扇70的風扇出風口73分別正對地鄰接該等減音出風口310。 The fans 70 are mounted side by side in the base 30. Each fan 70 includes a fan air inlet 71 and a fan air outlet 73 disposed opposite each other. When the fan 70 is installed, the fan 70 is located between the sound-reducing air outlet 310 and the system air inlet 370, the fan air inlet 71 faces the system air inlet 370, the fan air outlet 73 faces the system air outlet 350, and the fan air outlet 73 of the fan 70 respectively The sound vents 310 are adjacent to each other.

電子裝置10組裝好後,使用時,使風扇70運轉。風扇70使氣流由系統入風口370進入電子裝置10。該氣流平行於底板31流動,並依次流過風扇入風口71及風扇出風口73後,由系統出風口350流出電子裝置10。在此過程中,該氣流中有一小部分由減音出風口310、500沿垂直於底板31的方向流出電子裝置10。 After the electronic device 10 is assembled, the fan 70 is operated during use. The fan 70 allows airflow from the system air inlet 370 into the electronic device 10. The airflow flows parallel to the bottom plate 31 and flows through the fan air inlet 71 and the fan air outlet 73 in sequence, and then flows out of the electronic device 10 from the system air outlet 350. During this process, a small portion of the airflow exits the electronic device 10 in a direction perpendicular to the bottom plate 31 by the sound-reducing air outlets 310, 500.

由於風扇70運轉,使電子裝置10內產生氣壓梯度,且該氣壓梯度是由系統入風口370向系統出風口350遞減變化的。空氣沿該氣壓梯度遞減的方向流動,從而產生該氣流。其中,風扇出風口73處的氣壓梯度變化最大,這是引起氣動噪音的主要原因。因此,電子裝置10設置減音出風口310及500後,可將風扇出風口73處的氣流部分釋放到電子裝置10外,以減小風扇出風口73處的氣壓梯度變化,從而可以減弱氣動噪音。 Since the fan 70 is operated, a pressure gradient is generated in the electronic device 10, and the pressure gradient is gradually changed from the system air inlet 370 to the system air outlet 350. Air flows in a decreasing direction of the gas pressure gradient to produce the gas stream. Among them, the pressure gradient at the fan air outlet 73 changes the most, which is the main cause of aerodynamic noise. Therefore, after the electronic device 10 is provided with the sound-reducing air outlets 310 and 500, the airflow portion at the fan air outlet 73 can be released to the outside of the electronic device 10 to reduce the pressure gradient change at the fan air outlet 73, thereby attenuating the aerodynamic noise. .

需要說明的是,在其他實施方式中,風扇70的數量可根據實際需 要進行調整。另外,減音出風口310、500的通孔311、501的形態、數量及排列方式也可根據實際需要進行調整。 It should be noted that, in other embodiments, the number of fans 70 may be according to actual needs. To make adjustments. In addition, the form, number, and arrangement of the through holes 311 and 501 of the sound-reducing air outlets 310 and 500 can also be adjusted according to actual needs.

如圖3所示,為本發明的第二實施方式的電子裝置10A。電子裝置10A與電子裝置10的區別在於,電子裝置10A未在其底板31A上設置減音出風口,而僅在其頂板50A上設置了減音出風口500A。容易想到的是,在其他實施方式中,可以在底板31A上設置減音出風口,而不在頂板50A上設置減音出風口。 As shown in FIG. 3, the electronic device 10A according to the second embodiment of the present invention. The electronic device 10A differs from the electronic device 10 in that the electronic device 10A is not provided with a sound-reducing air outlet on its bottom plate 31A, and only the sound-reducing air outlet 500A is provided on the top plate 50A thereof. It is easily conceivable that in other embodiments, a sound-reducing air outlet may be provided on the bottom plate 31A without providing a sound-reducing air outlet on the top plate 50A.

如圖4所示,為本發明的第三實施方式的電子裝置10B。電子裝置10B與電子裝置10A的區別在於,電子裝置10B增設了裝於底板31B的氣流導罩90B來疏導氣流,從而進一步加強散熱效果。安裝氣流導罩90B時,氣流導罩90B位於風扇70B的出風口與系統出風口350B之間,且氣流導罩90B一端鄰接風扇70B的出風口,以將氣流由風扇70B的出風口疏導至系統出風口350B。為了使頂板50B上的減音出風口500B發揮作用,氣流導罩90B於其頂板91B的鄰接風扇70B的一端相應地開設了凹槽910B,使得氣流可以部分經由凹槽910B流出減音出風口500B。 As shown in FIG. 4, the electronic device 10B according to the third embodiment of the present invention. The electronic device 10B differs from the electronic device 10A in that the electronic device 10B is provided with an air flow guide 90B attached to the bottom plate 31B to divert air flow, thereby further enhancing the heat dissipation effect. When the airflow guide 90B is installed, the airflow guide 90B is located between the air outlet of the fan 70B and the system air outlet 350B, and one end of the airflow guide 90B abuts the air outlet of the fan 70B to guide the airflow from the air outlet of the fan 70B to the system. Air outlet 350B. In order to make the sound-reducing air outlet 500B on the top plate 50B function, the air flow guide 90B correspondingly defines a groove 910B at an end of the top plate 91B adjacent to the fan 70B, so that the airflow can partially flow out of the sound-reducing air outlet 500B via the groove 910B. .

經驗證,減音出風口310、500、500A、500B的設置,可使變動噪音強度(變動噪音強度為變動噪音與穩定噪音的比值,單位為%)平均降低約9%。這削弱了氣動噪音的影響,使電子裝置10、10A、10B的聲音品質得到大幅改善。 It has been verified that the setting of the sound-reducing air outlets 310, 500, 500A, and 500B can reduce the variable noise intensity (the variation noise intensity is the ratio of the variable noise to the stable noise in units of %) by about 9% on average. This weakens the influence of the aerodynamic noise, and the sound quality of the electronic devices 10, 10A, 10B is greatly improved.

另外,減音出風口310、500、500A、500B的設置,還可以使響度降低約2.2分貝(decibel,dB),使音調降低約0.03音調單位( tonality unit,Tu)。這使電子裝置10、10A、10B的聲音品質得到了近一步改善。 In addition, the settings of the sound-reducing air outlets 310, 500, 500A, and 500B can also reduce the loudness by about 2.2 decibels (dB), and reduce the pitch by about 0.03 pitch units ( Tonality unit, Tu). This results in a further improvement in the sound quality of the electronic devices 10, 10A, 10B.

綜上所述,本發明符合發明專利要件,爰依法提出專利申請。惟,以上所述者僅為本發明之較佳實施例,舉凡熟悉本案技藝之人士,在爰依本發明精神所作之等效修飾或變化,皆應涵蓋於以下之申請專利範圍內。 In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims.

10‧‧‧電子裝置 10‧‧‧Electronic devices

30‧‧‧基座 30‧‧‧Base

50‧‧‧頂板 50‧‧‧ top board

370‧‧‧系統入風口 370‧‧‧System inlet

350‧‧‧系統出風口 350‧‧‧ system air outlet

500‧‧‧減音出風口 500‧‧‧Attenuation outlet

Claims (4)

一種電子裝置,包括一基座、一裝設於該基座內的風扇、一氣流導罩以及一蓋合於該基座的頂板,該基座包括一與該頂板相對的底板以及由該底板的相對兩端分別延伸至該頂板的一前板及一後板,該前板開設一系統入風口,該後板開設一系統出風口,該風扇包括一朝向該系統入風口的風扇入風口以及一朝向該系統出風口的風扇出風口,該頂板鄰接該風扇出風口開設一減音出風口,該氣流導罩位於該風扇出風口與該系統出風口之間,且該氣流導罩一端鄰接該風扇出風口,該氣流導罩包括一頂板,該氣流導罩的頂板的鄰接該風扇出風口的一端開設一凹槽。 An electronic device includes a base, a fan mounted in the base, an airflow guide cover, and a top plate covering the base, the base includes a bottom plate opposite to the top plate, and the bottom plate The opposite ends extend to a front panel and a rear panel of the top panel. The front panel defines a system air inlet, the rear panel defines a system air outlet, and the fan includes a fan air inlet opening toward the air inlet of the system. a fan air outlet facing the air outlet of the system, the top plate adjacent to the fan air outlet opening a sound reduction air outlet, the air flow guide is located between the fan air outlet and the system air outlet, and the air flow guide is adjacent to the air outlet The fan air outlet includes a top plate, and a recess of the top surface of the air flow guide adjacent to the air outlet of the fan defines a recess. 如申請專利範圍第1項所述之電子裝置,其中該減音出風口包括開設於該頂板的呈“一”字形排列的複數通孔,該等通孔排列方向平行於該前板及該後板。 The electronic device of claim 1, wherein the sound reduction air outlet comprises a plurality of through holes arranged in a "one" shape on the top plate, the through holes are arranged in a direction parallel to the front plate and the rear board. 如申請專利範圍第2項所述之電子裝置,其中該風扇位於該系統入風口及該減音出風口之間。 The electronic device of claim 2, wherein the fan is located between the air inlet of the system and the sound reduction air outlet. 如申請專利範圍第3項所述之電子裝置,其中該底板也開設一減音出風口,該底板的減音出風口正對該頂板的減音出風口。 The electronic device of claim 3, wherein the bottom plate also defines a sound-reducing air outlet, and the sound-reducing air outlet of the bottom plate is opposite to the sound-reducing air outlet of the top plate.
TW98128917A 2009-08-27 2009-08-27 Fan cooling system and electronic device using the system TWI426181B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6554697B1 (en) * 1998-12-30 2003-04-29 Engineering Equipment And Services, Inc. Computer cabinet design
US6667883B1 (en) * 2002-08-29 2003-12-23 Proxim Corporation Forced-air cooling of a transceiver unit
TW200421072A (en) * 2003-04-11 2004-10-16 Shan-Ping Wu Method and apparatus for cooling a modular computer system with dual path airflow
US6914779B2 (en) * 2002-02-15 2005-07-05 Microsoft Corporation Controlling thermal, acoustic, and/or electromagnetic properties of a computing device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6554697B1 (en) * 1998-12-30 2003-04-29 Engineering Equipment And Services, Inc. Computer cabinet design
US6914779B2 (en) * 2002-02-15 2005-07-05 Microsoft Corporation Controlling thermal, acoustic, and/or electromagnetic properties of a computing device
US6667883B1 (en) * 2002-08-29 2003-12-23 Proxim Corporation Forced-air cooling of a transceiver unit
TW200421072A (en) * 2003-04-11 2004-10-16 Shan-Ping Wu Method and apparatus for cooling a modular computer system with dual path airflow

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