TWI398579B - A cooling fan with reduced noise - Google Patents
A cooling fan with reduced noise Download PDFInfo
- Publication number
- TWI398579B TWI398579B TW098143619A TW98143619A TWI398579B TW I398579 B TWI398579 B TW I398579B TW 098143619 A TW098143619 A TW 098143619A TW 98143619 A TW98143619 A TW 98143619A TW I398579 B TWI398579 B TW I398579B
- Authority
- TW
- Taiwan
- Prior art keywords
- fan
- shaft tube
- cooling fan
- heat dissipation
- outer frame
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
- F04D29/328—Rotors specially for elastic fluids for axial flow pumps for axial flow fans with unequal distribution of blades around the hub
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
- F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
- F04D29/542—Bladed diffusers
- F04D29/544—Blade shapes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
本發明是有關於一種散熱風扇,特別是指一種具降低噪音效果的散熱風扇。
參閱圖1、2,現有散熱風扇1包括一軸管11、一間隔環繞該軸管11外周緣的殼座12、多數等角度相間隔地連接該軸管11與該殼座12的連接桿13,及一轉動地設置於該軸管11中且具有多數扇葉141的扇輪14,其中,該殼座12界定有相反的一入風口121與一出風口122,利用轉動之該扇輪14的所述扇葉141將氣流由該入風口121吸入並自該出風口122排出以達成散熱的功效。
但隨著科技的發達,近年來電子產品的體積愈來愈小,造成所產生的熱量愈來愈不易排除,為此,相關業者皆積極研發散熱效果更好的散熱風扇1。
一般最為常見改善散熱效果的方法為增加該扇輪14的轉速,藉此增加所吸入與排出之氣流以提高散熱效率,然而,加快該扇輪14的轉速將會增加該散熱風扇1運轉時的耗電量。
為了減少耗電量,同時又能提高散熱效果,相關業者研發出如圖3所示之中華民國公告第M348864號「改良式增壓風扇」新型專利,其改善之處在於:將一靜葉輪15設置於該殼座12的出風口122處,該靜葉輪15具有一安裝於該殼座12的框體151、一位於該框體151中的固定環152,及多數連接該固定環152與該框體151的導引部153,利用所述扇葉141與導引部153雖然能產生增壓效果,提高氣流的流量與流速進而提高散熱效率;但是,加裝靜葉輪15也會造成整體體積的增加,在產品體積愈來愈小的趨勢下,龐大的體積不但造成安裝空間上的浪費同時也造成安裝上的不便;而且當氣流經所述扇葉141而通過所述導引部153時,因為受到所述導引部153的干擾還會產生較大的噪音(風切聲)。
因此,本發明之目的,即在提供一種體積較小、散熱效果好、又兼具增壓及降低噪音等功能之具降低噪音效果的散熱風扇。
於是,本發明具降低噪音效果的散熱風扇包含一殼座,及一樞設於該殼座中的扇輪。
該殼座包括一軸管、一間隔環繞該軸管的外框,及多數連接該軸管與該外框的連接件;該扇輪包括一樞設於該軸管的輪轂,及多數自該輪轂向外延伸的扇葉,其中,每兩相鄰扇葉之間的夾角皆不相同。
本發明之功效在於利用該扇輪上每兩相鄰扇葉之間夾角皆不相同的設計,使氣流形成擾流而產生增壓效果,同時有效提高氣流的流速與流量進以提高散熱效果,不但整體的體積較小,更可利用所述夾角皆不相同的扇葉抑制流場干擾的噪音使運轉時能夠更為安靜。
有關本發明之前述及其他技術內容、特點與功效,在以下配合參考圖式之三個較佳實施例的詳細說明中,將可清楚的呈現。
在本發明被詳細描述之前,要注意的是,在以下的說明內容中,類似的元件是以相同的編號來表示。
參閱圖4、5,本發明具降低噪音效果的散熱風扇2之第一較佳實施例包含一殼座21,及一樞設於該殼座21中的扇輪22。
該殼座21包括一軸管211、一間隔環繞該軸管211的外框212,及多數連接該軸管211與該外框212的連接件213;該扇輪22包括一樞設於該軸管211的輪轂221,及多數自該輪轂221向外延伸的扇葉222,其中,每兩相鄰扇葉222之間的夾角θ皆不相同。
當該散熱風扇2的扇輪22轉動時,氣流會依據圖5中箭頭31方向流動,而當氣流流經所述扇葉222時,利用每兩相鄰扇葉222之間的夾角θ皆不相同以擾動氣流,使氣流形成擾流而產生增壓效果,同時提高氣流的流速與流量,因此可以在相同的體積下具有較現有散熱風扇1(顯示於圖1)更好的散熱效果。
參閱圖4與附件1,發明人經由模擬實驗得知本發明具降低噪音效果的散熱風扇2之第一較佳實施例運轉時的噪音僅約25.1dB(A)[SPL],而現有散熱風扇的平均噪音值約為45.9dB(A)[SPL],所以本發明具降低噪音效果的散熱風扇2之噪音值較現有散熱風扇的噪音值減少了20.8dB(A)[SPL],足以證明本發明之具降低噪音效果的散熱風扇2運轉時能更為安靜。
參閱圖6、7,本發明具降低噪音效果的散熱風扇2之第二較佳實施例,大致是與該第一較佳實施例相同,不相同的地方在於:所述連接件213是呈葉片的型態,且每兩相鄰連接件213之間的夾角ψ皆不相同。為方便說明,圖6中的扇輪22以假想線繪製。
利用每兩相鄰連接件213之間的夾角ψ與每兩相鄰扇葉222之間的夾角θ皆不相同的設計,使氣流依據圖7中箭頭32所示方向流動時,能產生二次擾流與增壓的效果,所以能獲得較第一較佳實施例更好的散熱效果,此外,由於每兩相鄰連接件213之間的夾角ψ,與每兩相鄰扇葉222之間的夾角θ皆不相同,亦能更為有效地抑制流場干擾的噪音(風切聲)。
參閱圖8,本發明具降低噪音效果的散熱風扇2之第三較佳實施例,大致是與該第二較佳實施例相同,其中不同的地方在於:該殼座21更包括多數自該外框212朝向該軸管211方向延伸且長度皆相等的導流葉片214,所述導流葉片214是位於每兩連接件213之間且與該軸管211相間隔。
利用位於每兩連接件213之間,且與該軸管211相間隔的所述導流葉片214與所述呈葉片型態的連接件213相配合,更能有效提高抑制流場干擾噪音的功效。
當然,所述導流葉片214除了可以如圖8所示採用相同長度的設計外,也可如圖9所示採用不等長的設計,依然可以達成相同的效果。
綜上所述,本發明具降低噪音效果的散熱風扇2,利用該扇輪22每兩相鄰扇葉222之間夾角θ皆不相同的設計,使氣流形成擾流而產生增壓效果,同時也能提高氣流的流速與流量進以提高散熱效果,因此與相同體積之現有散熱風扇1相較下,該散熱風扇2仍具有更好的散熱效果,而且利用每兩相鄰扇葉222之間夾角θ皆不相同的設計,以抑制流場干擾的噪音使運轉時能夠更為安靜,故確實能達成本發明之目的。
惟以上所述者,僅為本發明之較佳實施例而已,當不能以此限定本發明實施之範圍,即大凡依本發明申請專利範圍及發明說明內容所作之簡單的等效變化與修飾,皆仍屬本發明專利涵蓋之範圍內。
2‧‧‧散熱風扇
21‧‧‧殼座
211‧‧‧軸管
212‧‧‧外框
213‧‧‧連接件
214‧‧‧導流葉片
ψ‧‧‧夾角
22‧‧‧扇輪
221‧‧‧輪轂
222‧‧‧扇葉
θ‧‧‧夾角
31、32‧‧‧箭頭
圖1是一俯視圖,說明一現有的散熱風扇;
圖2是一剖視圖,輔助說明圖1;
圖3是一剖視圖,說明中華民國公告第M348864號新型專利的「改良式增壓風扇」;
圖4是一俯視圖,說明本發明具降低噪音效果的散熱風扇的第一較佳實施例;
圖5是一剖視圖,輔助說明圖4;
圖6是一俯視圖,說明本發明具降低噪音效果的散熱風扇的第二較佳實施例;
圖7是一剖視圖,輔助說明圖6;
圖8是一俯視圖,說明本發明具降低噪音效果的散熱風扇的第三較佳實施例;及
圖9是一俯視圖,說明該第三較佳實施例的另一種態樣。
2...散熱風扇
21...殼座
212...外框
213...連接件
22...扇輪
221...輪轂
222...扇葉
θ...夾角
Claims (1)
- 一種具降低噪音效果的散熱風扇,包含:一殼座,包括一軸管、一間隔環繞該軸管的外框、多數連接該軸管與該外框的連接件,及多數自該外框朝向該軸管方向延伸且長度皆不同的導流葉片,其中,所述連接件是葉片的型態,且每二相鄰連接件之間的夾角皆不相同,所述導流葉片是位於每兩連接件之間且與該軸管相間隔;及一扇輪,包括一樞設於該軸管的輪轂,及多數自該輪轂向外延伸的扇葉,其中,每兩相鄰扇葉之間的夾角皆不相同。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW098143619A TWI398579B (zh) | 2009-12-18 | 2009-12-18 | A cooling fan with reduced noise |
US12/778,477 US20110150639A1 (en) | 2009-12-18 | 2010-05-12 | Fan Device |
EP10163729A EP2336569B1 (en) | 2009-12-18 | 2010-05-25 | Fan device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW098143619A TWI398579B (zh) | 2009-12-18 | 2009-12-18 | A cooling fan with reduced noise |
Publications (2)
Publication Number | Publication Date |
---|---|
TW201122231A TW201122231A (en) | 2011-07-01 |
TWI398579B true TWI398579B (zh) | 2013-06-11 |
Family
ID=42575795
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW098143619A TWI398579B (zh) | 2009-12-18 | 2009-12-18 | A cooling fan with reduced noise |
Country Status (3)
Country | Link |
---|---|
US (1) | US20110150639A1 (zh) |
EP (1) | EP2336569B1 (zh) |
TW (1) | TWI398579B (zh) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103133429B (zh) * | 2011-12-05 | 2015-09-09 | 奇鋐科技股份有限公司 | 无叶片风扇结构 |
CN103573717B (zh) * | 2012-07-24 | 2018-06-12 | 德昌电机(深圳)有限公司 | 风扇及其叶轮 |
USD732655S1 (en) * | 2013-11-21 | 2015-06-23 | Sanyo Denki Co., Ltd. | Fan |
CN204213047U (zh) * | 2014-10-24 | 2015-03-18 | 常州格力博有限公司 | 轴流吹风机风叶 |
US11236760B2 (en) * | 2015-12-11 | 2022-02-01 | Delta Electronics, Inc. | Impeller and fan |
US20190063464A1 (en) * | 2017-08-31 | 2019-02-28 | Ford Global Technologies, Llc | Engine cooling fans with uneven blade spacing |
DE102017126823A1 (de) * | 2017-11-15 | 2019-05-16 | Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg | Kühlerlüftermodul |
TWI785947B (zh) * | 2021-12-27 | 2022-12-01 | 元山科技工業股份有限公司 | 可減震的風扇殼座 |
Citations (4)
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US20020182053A1 (en) * | 2000-01-28 | 2002-12-05 | Atsushi Miyazawa | Axial fan, centrifugal fan, and electronic equipment employing one of these fans |
US20070048129A1 (en) * | 2005-08-24 | 2007-03-01 | Delta Electronics, Inc. | Fan and fan housing with airflow-guiding stationary blades |
JP2008303778A (ja) * | 2007-06-07 | 2008-12-18 | Nippon Densan Corp | ファン装置 |
TWI307742B (en) * | 2006-05-02 | 2009-03-21 | Delta Electronics Inc | Fan and impeller thereof |
Family Cites Families (11)
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US2950859A (en) * | 1956-12-03 | 1960-08-30 | Meier Electric And Machine Com | Fan housing and protective grill |
JPS4924005B1 (zh) * | 1967-09-28 | 1974-06-20 | ||
DE2945223A1 (de) * | 1978-12-06 | 1980-06-12 | Ford Werke Ag | Luefterrad fuer verbrennungskraftmaschinen |
JPS5685594A (en) * | 1979-12-17 | 1981-07-11 | Matsushita Seiko Co Ltd | Fan of unequal interval |
JP3567086B2 (ja) * | 1998-07-28 | 2004-09-15 | 株式会社東芝 | 送風羽根及び回転電機 |
FR2824597B1 (fr) * | 2001-05-11 | 2004-04-02 | Snecma Moteurs | Reduction de vibrations dans une structure comprenant un rotor et des sources de perturbation fixes |
TW200639327A (en) * | 2005-05-13 | 2006-11-16 | Delta Electronics Inc | Heat-dissipating device and frame thereof |
DE102005023868C5 (de) * | 2005-05-24 | 2008-05-21 | Minebea Co., Ltd. | Ventilator |
US7588419B2 (en) * | 2006-03-27 | 2009-09-15 | Valeo, Inc. | Vehicle cooling fan |
KR20080039599A (ko) * | 2006-11-01 | 2008-05-07 | 현대자동차주식회사 | 차량용 팬 구조 |
JP2008261280A (ja) * | 2007-04-12 | 2008-10-30 | Nippon Densan Corp | 軸流ファン |
-
2009
- 2009-12-18 TW TW098143619A patent/TWI398579B/zh not_active IP Right Cessation
-
2010
- 2010-05-12 US US12/778,477 patent/US20110150639A1/en not_active Abandoned
- 2010-05-25 EP EP10163729A patent/EP2336569B1/en not_active Not-in-force
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020182053A1 (en) * | 2000-01-28 | 2002-12-05 | Atsushi Miyazawa | Axial fan, centrifugal fan, and electronic equipment employing one of these fans |
US20070048129A1 (en) * | 2005-08-24 | 2007-03-01 | Delta Electronics, Inc. | Fan and fan housing with airflow-guiding stationary blades |
TWI307742B (en) * | 2006-05-02 | 2009-03-21 | Delta Electronics Inc | Fan and impeller thereof |
JP2008303778A (ja) * | 2007-06-07 | 2008-12-18 | Nippon Densan Corp | ファン装置 |
Also Published As
Publication number | Publication date |
---|---|
EP2336569A1 (en) | 2011-06-22 |
US20110150639A1 (en) | 2011-06-23 |
TW201122231A (en) | 2011-07-01 |
EP2336569B1 (en) | 2012-12-05 |
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