EP2336569A1 - Fan device - Google Patents

Fan device Download PDF

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Publication number
EP2336569A1
EP2336569A1 EP10163729A EP10163729A EP2336569A1 EP 2336569 A1 EP2336569 A1 EP 2336569A1 EP 10163729 A EP10163729 A EP 10163729A EP 10163729 A EP10163729 A EP 10163729A EP 2336569 A1 EP2336569 A1 EP 2336569A1
Authority
EP
European Patent Office
Prior art keywords
air
fan
blades
guiding
receiving space
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10163729A
Other languages
German (de)
French (fr)
Other versions
EP2336569B1 (en
Inventor
Chien-Jung Chen
Chih-Tsung Hsu
Hsin-Hsien Wu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yen Sun Technology Corp
Original Assignee
Yen Sun Technology Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yen Sun Technology Corp filed Critical Yen Sun Technology Corp
Publication of EP2336569A1 publication Critical patent/EP2336569A1/en
Application granted granted Critical
Publication of EP2336569B1 publication Critical patent/EP2336569B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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

Definitions

  • the invention relates to a fan device, and more particularly to a fan device capable of reducing acoustic noise.
  • a conventional fan device includes a fan impeller mounted in a fan housing.
  • the fan impeller includes a hub body, and a plurality of angularly spaced apart fan blades extending outwardly and radially from the hub body.
  • greater acoustic noise occurs during rotation of the fan impeller at a speed within a certain speed range.
  • an object of the present invention is to provide a fan device that can overcome the aforesaid drawback of the prior art.
  • a fan device comprises:
  • the first preferred embodiment of a fan device according to the present invention is shown to include a fan housing 1, and a fan impeller 2.
  • the fan housing 1 is configured with a receiving space 10, and has a bottom wall 11, a top wall 12 and a surrounding side wall 13.
  • the bottom wall 11 is formed with an air inlet 111 in spatial communication with the receiving space 10.
  • the top wall 12 is formed with an air outlet 121 in spatial communication with the receiving space 10.
  • the surrounding side wall 13 is transverse to and interconnects the top and bottom walls 12, 11, and cooperates with the top and bottom walls 12, 11 to define the receiving space 10 thereamong.
  • the fan housing 1 further includes a connecting member 14 and a plurality of connecting ribs 15.
  • the connecting member 14 is placed in the receiving space 10, and is disposed adjacent to the air inlet 111.
  • the connecting ribs 15 interconnect the connecting member 14 and the surrounding side wall 131.
  • the fan impeller 2 is mounted in the receiving space 10 in the fan housing 1, is disposed adjacent to the air outlet 121 in the top wall 12 of the fan housing 1, and is operable to rotate about a central axis (X) that is transverse to the top and bottom walls 12, 11.
  • the fan impeller 2 includes a hub body 21, and a plurality of fan blades 22 extending outwardly and radially from the hub body 21. It is noted that an angular distance ( ⁇ ) between each adjacent pair of the fan blades 22 is different from that of any other adjacent pair of the fan blades 22. An air passage is formed between each adjacent pair of the fan blades 22.
  • rotation of the fan impeller 2 draws air to flow from the air inlet 111 toward the air outlet 121 through the air passages, as indicated by solid-line arrows in Figure 2 .
  • acoustic noise about 25.1dB caused by the fan device of the present invention during operation is less than that (about 45. 9dB) of the conventional fan device with angularly equidistant fan blades. Therefore, the fan device of the present invention can be operated with reduced acoustic noise.
  • Figures 3 to 5 illustrate the second preferred embodiment of a fan device according to this invention, which is a modification of the first preferred embodiment.
  • the connecting member 14 and the connecting ribs 15 are dispensed with.
  • the fan device further includes an air-guiding unit 3.
  • the air-guiding unit 3 is mounted fixedly in the receiving space 10 in the fan housing 1, and is disposed adjacent to the air inlet 111 in the bottom wall 11 of the fan housing 1.
  • the air-guiding unit 3 includes a center connecting member 31 disposed coaxially with the central axis (X), and a plurality of air-guiding blades 32 angularly spaced apart from each other and interconnecting the central connecting member 31 and the surrounding side wall 13 of the fan housing 1.
  • An angular distance ( ⁇ ) between each adjacent pair of the air-guiding blades 32 is different from that of any other adjacent pair of the air-guiding blades 32.
  • the center connecting member 31 includes a circular cap body 312, and a tube body 311 extending integrally from the cap body 312 toward the hub body 21 and disposed coaxially with the central axis (X).
  • Figure 6 illustrates the third preferred embodiment of a fan device according to this invention, which is a modification of the second preferred embodiment.
  • the air-guiding unit 3' further includes a plurality of auxiliary air-guiding blades 33 extending inwardly and radially from the surrounding side wall 13 of the fan housing 1 toward the central connecting member 31.
  • Each auxiliary air-guiding blade 33 is disposed between a corresponding adjacent pair of the air-guiding blades 32, and is spaced apart from the corresponding adjacent pair of the air-guiding blades 32 and the central connectingmember 31.
  • the auxiliary air-guiding blades 33 have the same length.
  • Figure 7 illustrates a variation of the third preferred embodiment, wherein each of the auxiliary air-guiding blades 33 of the air-guiding unit 3' has a length different from that of any other one of the auxiliary air-guiding blades 33.

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)

Abstract

A fan device includes: a fan housing (1) configured with a receiving space (10) defined among opposite top and bottom walls (12, 11), and a surrounding side wall (13); and a fan impeller (2) mounted in the receiving space (10), disposed adjacent to an air outlet (121) in the top wall (12) and operable to rotate about a central axis (X) transverse to the top and bottom walls (12, 11) of the fan housing (1). The fan impeller (2) includes a hub body (21) disposed coaxially with the central axis (X) , and a plurality of angularly spaced apart fan blades (22) extending outwardly and radially from the hub body (21). An angular distance (φ) between each adjacent pair of the fan blades (22) is different from that of any other adjacent pair of the fan blades (22).

Description

  • The invention relates to a fan device, and more particularly to a fan device capable of reducing acoustic noise.
  • A conventional fan device includes a fan impeller mounted in a fan housing. The fan impeller includes a hub body, and a plurality of angularly spaced apart fan blades extending outwardly and radially from the hub body. However, in such a configuration, greater acoustic noise occurs during rotation of the fan impeller at a speed within a certain speed range.
  • Therefore, an object of the present invention is to provide a fan device that can overcome the aforesaid drawback of the prior art.
  • According to the present invention, a fan device comprises:
    • a fan housing configured with a receiving space, and having a bottom wall formed with an air inlet in spatial communication with the receiving space, a top wall formed with an air outlet in spatial communication with the receiving space, and a surrounding side wall transverse to and interconnecting the top and bottom walls, and cooperating with the top and bottom walls to define the receiving space thereamong; and
    • a fan impeller mounted in the receiving space in the fan housing, disposed adjacent to the air outlet in the top wall of the fan housing, and operable to rotate about a central axis that is transverse to the top and bottom walls of the fan housing, the fan impeller including a hub body disposed coaxially with the central axis, and a plurality of angularly spaced apart fan blades extending outwardly and radially from the hub body, an angular distance between each adjacent pair of the fan blades being different from that of any other adjacent pair of the fan blades.
  • Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiments with reference to the accompanying drawings, of which:
    • Figure 1 is a schematic top view showing the first preferred embodiment of a fan device according to the present invention;
    • Figure 2 is a schematic sectional view of the first preferred embodiment taken along line II-II in Figure 1;
    • Figure 3 is a schematic bottom view showing the second preferred embodiment of a fan device according to the present invention;
    • Figure 4 is a perspective view showing the second preferred embodiment without a fan impeller;
    • Figure 5 is a partly schematic sectional view showing the second preferred embodiment;
    • Figure 6 is a schematic top view showing the third preferred embodiment of a fan device according to the present invention without a fan impeller; and
    • Figure 7 is a schematic top view showing a variation of the third preferred embodiment.
  • Before the present invention is described in greater detail, it should be noted that like elements are denoted by the same reference numerals throughout the disclosure.
  • Referring to Figures 1 and 2, the first preferred embodiment of a fan device according to the present invention is shown to include a fan housing 1, and a fan impeller 2.
  • The fan housing 1 is configured with a receiving space 10, and has a bottom wall 11, a top wall 12 and a surrounding side wall 13. The bottom wall 11 is formed with an air inlet 111 in spatial communication with the receiving space 10. The top wall 12 is formed with an air outlet 121 in spatial communication with the receiving space 10. The surrounding side wall 13 is transverse to and interconnects the top and bottom walls 12, 11, and cooperates with the top and bottom walls 12, 11 to define the receiving space 10 thereamong. In this embodiment, the fan housing 1 further includes a connecting member 14 and a plurality of connecting ribs 15. The connecting member 14 is placed in the receiving space 10, and is disposed adjacent to the air inlet 111. The connecting ribs 15 interconnect the connecting member 14 and the surrounding side wall 131.
  • The fan impeller 2 is mounted in the receiving space 10 in the fan housing 1, is disposed adjacent to the air outlet 121 in the top wall 12 of the fan housing 1, and is operable to rotate about a central axis (X) that is transverse to the top and bottom walls 12, 11. The fan impeller 2 includes a hub body 21, and a plurality of fan blades 22 extending outwardly and radially from the hub body 21. It is noted that an angular distance (Ø) between each adjacent pair of the fan blades 22 is different from that of any other adjacent pair of the fan blades 22. An air passage is formed between each adjacent pair of the fan blades 22.
  • In use, rotation of the fan impeller 2 draws air to flow from the air inlet 111 toward the air outlet 121 through the air passages, as indicated by solid-line arrows in Figure 2.
  • Since the angular distances (Ø) are different from each other, noise with different frequencies occurs when air flows through the air passages, thereby avoiding accumulation of noise with the same frequency. According to experimental measurement results, acoustic noise about 25.1dB caused by the fan device of the present invention during operation is less than that (about 45. 9dB) of the conventional fan device with angularly equidistant fan blades. Therefore, the fan device of the present invention can be operated with reduced acoustic noise.
  • Figures 3 to 5 illustrate the second preferred embodiment of a fan device according to this invention, which is a modification of the first preferred embodiment. As composed to the first preferred embodiment, the connecting member 14 and the connecting ribs 15 are dispensed with. Furthermore, the fan device further includes an air-guiding unit 3.
  • The air-guiding unit 3 is mounted fixedly in the receiving space 10 in the fan housing 1, and is disposed adjacent to the air inlet 111 in the bottom wall 11 of the fan housing 1. The air-guiding unit 3 includes a center connecting member 31 disposed coaxially with the central axis (X), and a plurality of air-guiding blades 32 angularly spaced apart from each other and interconnecting the central connecting member 31 and the surrounding side wall 13 of the fan housing 1. An angular distance ( θ ) between each adjacent pair of the air-guiding blades 32 is different from that of any other adjacent pair of the air-guiding blades 32. In this embodiment, the center connecting member 31 includes a circular cap body 312, and a tube body 311 extending integrally from the cap body 312 toward the hub body 21 and disposed coaxially with the central axis (X).
  • When the fan impeller 2 is driven to rotate, air flowing from the air inlet 111 is guided by the air-guiding blades 32, and then flows toward the air outlet 121 through the air passages, as indicated by solid-line arrows in Figure 5. Therefore, due to the presence of the air-guiding unit 3, air pressure produced by the fan device can be enhanced. Furthermore, since the angular distances ( θ ) are different from each other, acoustic noise caused by the fan device can be further reduced.
  • Figure 6 illustrates the third preferred embodiment of a fan device according to this invention, which is a modification of the second preferred embodiment. As compared to the second preferred embodiment, the air-guiding unit 3' further includes a plurality of auxiliary air-guiding blades 33 extending inwardly and radially from the surrounding side wall 13 of the fan housing 1 toward the central connecting member 31. Each auxiliary air-guiding blade 33 is disposed between a corresponding adjacent pair of the air-guiding blades 32, and is spaced apart from the corresponding adjacent pair of the air-guiding blades 32 and the central connectingmember 31. In this embodiment, the auxiliary air-guiding blades 33 have the same length. Figure 7 illustrates a variation of the third preferred embodiment, wherein each of the auxiliary air-guiding blades 33 of the air-guiding unit 3' has a length different from that of any other one of the auxiliary air-guiding blades 33.

Claims (5)

  1. A fan device characterized by:
    a fan housing (1) configured with a receiving space (10), and having a bottom wall (11) formed with an air inlet (111) in spatial communication with said receiving space (10), a top wall (12) formed with an air outlet (121) in spatial communication with said receiving space (10), and a surrounding side wall (13) transverse to and interconnecting said top and bottom walls (12, 11) , and cooperating with said top and bottom walls (12, 11) to define said receiving space (10) thereamong; and
    a fan impeller (2) mounted in said receiving space (10) in said fan housing (1), disposed adjacent to said air outlet (121) in said top wall (12) of said fan housing (1), and operable to rotate about a central axis (X) that is transverse to said top and bottom walls (12, 11) of said fan housing (1), said fan impeller (2) including a hub body (21) disposed coaxially with the central axis (X), and a plurality of angularly spaced apart fan blades (22) extending outwardly and radially from said hub body (21) , an angular distance (φ) between each adjacent pair of said fan blades (22) being different from that of any other adjacent pair of said fan blades (22).
  2. The fan device as claimed in Claim 1, further characteri zed by an air-guiding unit (3) mounted fixedly in said receiving space (10) in said fan housing (1) and disposed adjacent to said air inlet (111) in said bottom wall (11) of said fan housing (1), said air-guiding unit (3) including a center connecting member (31) disposed coaxially with the central axis (X) , and a plurality of air-guiding blades (32) angularly spaced apart from each other and interconnecting said central connecting member (31) and said surrounding side wall (13) of said fan housing (1), an angular distance (θ) between each adjacent pair of said air-guiding blades (32) being different from that of any other adjacent pair of said air-guiding blades (32).
  3. The fan device as claimed in Claim 2, further characterized in that said air-guiding unit (3) further includes a plurality of auxiliary air-guiding blades (33) extending inwardly and radially from said surrounding side wall (13) of said fan housing (1) toward said central connecting member (31), each of said auxiliary air-guiding blades (33) being disposed between a corresponding adjacent pair of said air-guiding blades (32) and being spaced apart from the corresponding adjacent pair of said air-guiding blades (32) and said central connecting member (31).
  4. The fan device as claimed in Claim 3, further characterized in that said auxiliary air-guiding blades (22) of said air-guiding unit (3' ) have the same length.
  5. The fan device as claimed in Claim 3, further characterized in that each of said auxiliary air-guiding blades (33) of said air-guiding unit (3') has a length different from that of any other one of said auxiliary air-guiding blades (32).
EP10163729A 2009-12-18 2010-05-25 Fan device Active EP2336569B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW098143619A TWI398579B (en) 2009-12-18 2009-12-18 A cooling fan with reduced noise

Publications (2)

Publication Number Publication Date
EP2336569A1 true EP2336569A1 (en) 2011-06-22
EP2336569B1 EP2336569B1 (en) 2012-12-05

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US (1) US20110150639A1 (en)
EP (1) EP2336569B1 (en)
TW (1) TWI398579B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016062132A1 (en) * 2014-10-24 2016-04-28 常州格力博有限公司 Axial flow blower fan blade
EP3486499A1 (en) * 2017-11-15 2019-05-22 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Cooler ventilation module

Families Citing this family (6)

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Publication number Priority date Publication date Assignee Title
CN103133429B (en) * 2011-12-05 2015-09-09 奇鋐科技股份有限公司 blade-free fan structure
CN103573717B (en) * 2012-07-24 2018-06-12 德昌电机(深圳)有限公司 Fan and its impeller
USD732655S1 (en) * 2013-11-21 2015-06-23 Sanyo Denki Co., Ltd. Fan
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
TWI785947B (en) * 2021-12-27 2022-12-01 元山科技工業股份有限公司 Shock absorbing fan housing

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JPS5685594A (en) * 1979-12-17 1981-07-11 Matsushita Seiko Co Ltd Fan of unequal interval
US20020182053A1 (en) * 2000-01-28 2002-12-05 Atsushi Miyazawa Axial fan, centrifugal fan, and electronic equipment employing one of these fans
DE102005023868B3 (en) * 2005-05-24 2006-07-20 Minebea Co., Ltd. Fan for e.g. computer, has holder with props, which connect electric motor with frame component, where number of blades connected with motor is smaller than number of blades connected with frame component
US20060257254A1 (en) * 2005-05-13 2006-11-16 Delta Electronics, Inc. Heat dissipation apparatus and fan frame thereof
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US20080101936A1 (en) * 2006-11-01 2008-05-01 Jeong-Han Lee Fan for vehicle
JP2008303778A (en) * 2007-06-07 2008-12-18 Nippon Densan Corp Fan device

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JPS5685594A (en) * 1979-12-17 1981-07-11 Matsushita Seiko Co Ltd Fan of unequal interval
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016062132A1 (en) * 2014-10-24 2016-04-28 常州格力博有限公司 Axial flow blower fan blade
EP3486499A1 (en) * 2017-11-15 2019-05-22 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Cooler ventilation module
KR20190055764A (en) * 2017-11-15 2019-05-23 브로제 파르초이크타일레 게엠베하 운트 코. 콤만디트게젤샤프트 뷔르츠부르크 Cooling fan module
CN110030211A (en) * 2017-11-15 2019-07-19 布洛泽汽车部件制造沃尔兹堡有限公司 Cooler blower module
CN110030211B (en) * 2017-11-15 2020-10-27 布洛泽汽车部件制造沃尔兹堡有限公司 Cooler fan module
US10989055B2 (en) 2017-11-15 2021-04-27 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Wuerzburg Cooling fan module
KR102296564B1 (en) 2017-11-15 2021-08-31 브로제 파르초이크타일레 에스에 운트 코. 콤만디트게젤샤프트, 뷔르츠부르크 Cooling fan module

Also Published As

Publication number Publication date
TW201122231A (en) 2011-07-01
TWI398579B (en) 2013-06-11
US20110150639A1 (en) 2011-06-23
EP2336569B1 (en) 2012-12-05

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