EP1422425A3 - Axial-flow fan - Google Patents

Axial-flow fan Download PDF

Info

Publication number
EP1422425A3
EP1422425A3 EP03016732A EP03016732A EP1422425A3 EP 1422425 A3 EP1422425 A3 EP 1422425A3 EP 03016732 A EP03016732 A EP 03016732A EP 03016732 A EP03016732 A EP 03016732A EP 1422425 A3 EP1422425 A3 EP 1422425A3
Authority
EP
European Patent Office
Prior art keywords
pressure
axial
blade tips
air
flow fan
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
EP03016732A
Other languages
German (de)
French (fr)
Other versions
EP1422425B1 (en
EP1422425A2 (en
Inventor
Sim Won Chin
Moon Kee Chung
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.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
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 LG Electronics Inc filed Critical LG Electronics Inc
Publication of EP1422425A2 publication Critical patent/EP1422425A2/en
Publication of EP1422425A3 publication Critical patent/EP1422425A3/en
Application granted granted Critical
Publication of EP1422425B1 publication Critical patent/EP1422425B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • F04D29/38—Blades
    • 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
    • F04D29/38—Blades
    • F04D29/384—Blades characterised by form
    • 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)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

Disclosed is an axial-flow fan comprising a hub (52) and a plurality of blades (54) located on an outer circumference of the hub so as to axially blow air. Each blade (54) includes a positive pressure side (54d) to which high pressure of the air is applied, a negative pressure side (54e) to which low pressure of the air is applied, and a protuberance (56) formed on the positive pressure side (54d) so as to reduce the difference of pressure between the positive and negative pressure sides. The axial-flow fan reduces the amount of an airflow flowing along the positive pressure sides (54d) at blade tips (54c), and causes air to effectively flow at the blade tips (54c), thereby reducing the difference of pressure between the positive pressure sides (54d) and the negative pressure sides (54e) at the blade tips (54c) and preventing the occurrence of a vortex generated at the blade tips (54c). Further, the axial-flow fan slows down the restoration to the static pressure of air flowing between the positive pressure sides to the negative pressure sides at the blade tips of blades, thereby reducing the noise generated by the operation of the fan.
EP03016732A 2002-11-19 2003-07-22 Axial-flow fan Expired - Fee Related EP1422425B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2002071993 2002-11-19
KR10-2002-0071993A KR100484824B1 (en) 2002-11-19 2002-11-19 An axial flow fan

Publications (3)

Publication Number Publication Date
EP1422425A2 EP1422425A2 (en) 2004-05-26
EP1422425A3 true EP1422425A3 (en) 2005-01-19
EP1422425B1 EP1422425B1 (en) 2008-12-03

Family

ID=32226319

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03016732A Expired - Fee Related EP1422425B1 (en) 2002-11-19 2003-07-22 Axial-flow fan

Country Status (4)

Country Link
EP (1) EP1422425B1 (en)
JP (1) JP2004169682A (en)
KR (1) KR100484824B1 (en)
ES (1) ES2316676T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110431311A (en) * 2017-04-14 2019-11-08 大金工业株式会社 Propeller fan

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100547328B1 (en) * 2003-09-05 2006-01-26 엘지전자 주식회사 The fan of air-conditioner outdoor unit
EP2212562B2 (en) * 2007-10-25 2017-05-03 LG Electronics Inc. Fan
JP5425678B2 (en) * 2010-03-24 2014-02-26 三洋電機株式会社 Axial fan
KR20170032791A (en) 2015-09-15 2017-03-23 김서연 Lawn chair

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB401625A (en) * 1932-07-30 1933-11-16 British Thomson Houston Co Ltd Improvements in and relating to rotary fans
EP0955469A2 (en) * 1998-04-14 1999-11-10 Matsushita Electric Industrial Co., Ltd. Impeller of fan
EP0992693A1 (en) * 1998-10-08 2000-04-12 GATE S.p.A. Axial fan
US6447251B1 (en) * 2000-04-21 2002-09-10 Revcor, Inc. Fan blade

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2809442B2 (en) * 1989-08-30 1998-10-08 カルソニック株式会社 Cooling fan for automotive heat exchanger
US4930990A (en) * 1989-09-15 1990-06-05 Siemens-Bendix Automotive Electronics Limited Quiet clutch fan blade
JP2765219B2 (en) * 1990-11-06 1998-06-11 株式会社デンソー Blower fan
JP3203994B2 (en) * 1994-10-31 2001-09-04 三菱電機株式会社 Axial blower
JP3346179B2 (en) * 1996-08-02 2002-11-18 ダイキン工業株式会社 Impeller for blower
JPH1144432A (en) * 1997-07-24 1999-02-16 Hitachi Ltd Air conditioner
KR19990020857A (en) * 1997-08-30 1999-03-25 양재신 Low noise cooling fan with good ventilation
KR100421884B1 (en) * 2001-02-13 2004-03-09 엘지전자 주식회사 axial fan
JP2002250298A (en) * 2001-02-23 2002-09-06 Mitsubishi Heavy Ind Ltd Propeller fan

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB401625A (en) * 1932-07-30 1933-11-16 British Thomson Houston Co Ltd Improvements in and relating to rotary fans
EP0955469A2 (en) * 1998-04-14 1999-11-10 Matsushita Electric Industrial Co., Ltd. Impeller of fan
EP0992693A1 (en) * 1998-10-08 2000-04-12 GATE S.p.A. Axial fan
US6447251B1 (en) * 2000-04-21 2002-09-10 Revcor, Inc. Fan blade

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110431311A (en) * 2017-04-14 2019-11-08 大金工业株式会社 Propeller fan

Also Published As

Publication number Publication date
KR20040043623A (en) 2004-05-24
JP2004169682A (en) 2004-06-17
EP1422425B1 (en) 2008-12-03
ES2316676T3 (en) 2009-04-16
KR100484824B1 (en) 2005-04-22
EP1422425A2 (en) 2004-05-26

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