EP1618821A2 - Zentrifugalgebläse und Staubsauger umfassend ein solches Zentrifugalgebläse - Google Patents

Zentrifugalgebläse und Staubsauger umfassend ein solches Zentrifugalgebläse Download PDF

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Publication number
EP1618821A2
EP1618821A2 EP05291532A EP05291532A EP1618821A2 EP 1618821 A2 EP1618821 A2 EP 1618821A2 EP 05291532 A EP05291532 A EP 05291532A EP 05291532 A EP05291532 A EP 05291532A EP 1618821 A2 EP1618821 A2 EP 1618821A2
Authority
EP
European Patent Office
Prior art keywords
air
diffuser
partition plate
impeller
centrifugal 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
EP05291532A
Other languages
English (en)
French (fr)
Other versions
EP1618821B1 (de
EP1618821A3 (de
Inventor
Ki-Dong Kim
Kwang-Woon Ahn
Ho-Seon Rew
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 EP1618821A2 publication Critical patent/EP1618821A2/de
Publication of EP1618821A3 publication Critical patent/EP1618821A3/de
Application granted granted Critical
Publication of EP1618821B1 publication Critical patent/EP1618821B1/de
Expired - Fee Related 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F04D29/444—Bladed diffusers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/22—Mountings for motor fan assemblies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/52—Outlet

Definitions

  • the present invention relates to a centrifugal fan of a vacuum cleaner and, more particularly, to a centrifugal fan capable of enhancing a suction force and efficiency by forcibly introducing air discharged from a defuser toward a vane to reduce a flow loss of air, and a vacuum cleaner having the centrifugal fan.
  • Figure 1 is a sectional view of a centrifugal fan in accordance with a conventional art.
  • the conventional centrifugal fan includes an impeller casing 104 having a suction opening 102 formed at its front side, a motor housing 108 connected with the impeller casing 104 and having a discharge hole 106 for discharging air, a driving motor 110 installed in the motor housing 108 and generating a rotational force, an impeller 116 rotatably disposed at the impeller casing 104 and connected with the driving motor 110 by a rotational shaft 112 to generate an air blowing force, and a guide vane 130 disposed at a rear side of the impeller 116, increasing a static pressure of air sent from the impeller 116 and guiding air sent from the impeller 116 toward the discharge hole 106 through the driving motor 110.
  • the impeller 116 includes a hub 118 fixed at the rotational shaft 112 by a holder 140 and a plurality of blades 120 connected at equal intervals in a circumferential direction at an outer circumferential surface of the hub 118 and sending air in a radial direction.
  • the guide vane 130 includes defusers 132 formed at an outer circumferential surface of the blade 120 of the impeller 116 with a certain interval from an end portion of the blade 120, a partition plate 134 fixed at an inner circumferential surface of the impeller casing 104 on which the diffusers 132 are formed, and a rear vane 136 formed at a lower surface of the partition plate 134 and guiding air discharged from the defusers 132 so as to pass through the driving motor 110.
  • the conventional centrifugal fan operates as follows.
  • the impeller 116 When the rotational shaft 112 is rotated as the driving motor 110 is driven, the impeller 116 is rotated to suck air through the suction opening 102.
  • the air sucked through the suction opening 102 is sent in the radial direction by the blades 120 of the impeller 116 to pass through the diffusers 132, a static pressure of the air being increased while passing through the diffusers 132, and then, flows downwardly through a space between an inner circumferential surface of the impeller casing and an outer circumferential surface of the partition plate. And then, the air is guided toward the center by the rear vane 136 so as to be guided to pass through the driving motor.
  • the air While passing through the driving motor 110, the air cools the motor 110 and then externally discharged through the discharge hole 106 formed at the motor housing 108.
  • the conventional centrifugal fan has the following problems.
  • an object of the present invention is to provide a centrifugal fan capable of enhancing a suction force and efficiency by reducing a flow loss of air by installing an air guiding member at a diffuser and inducing air discharged from the diffuser to a rear vane, and a vacuum cleaner having the centrifugal fan.
  • a centrifugal fan including: a driving motor for generating a rotational force; an impeller connected with the driving motor by a rotational shaft and generating an air blowing force; a partition plate installed inside an impeller casing; a diffuser formed at an edge portion of an upper surface of the partition plate and increasing a pressure of air which has passed through the impeller; a rear vane formed at a lower surface of the partition plate and guiding air discharged from the diffuser so as to pass through the driving motor; and an air guiding member formed at certain intervals at an outer surface of the diffuser and guiding air which has passed through the diffuser toward the rear vane.
  • the air guiding member is formed as a plate in an air-foil shape and formed to be tilt downwardly at a side of the diffuser blade, of which one side is integrally formed with the side of the diffuser blades and the other side contacts with an inner circumferential surface of the impeller casing.
  • a vacuum cleaner including a cleaner body having a centrifugal fan for generating a suction force and a dust collection filter for collecting dust, and a suction nozzle for sucking dust
  • the centrifugal fan includes: a driving motor for generating a rotational force; an impeller connected with the driving motor by a rotational shaft and generating an air blowing force; a partition plate installed inside an impeller casing; a diffuser formed at an edge portion of an upper surface of the partition plate and increasing a pressure of air which has passed through the impeller; a rear vane formed at a lower surface of the partition plate and guiding air discharged from the diffuser so as to pass through the driving motor; and an air guiding member formed at certain intervals at an outer surface of the diffuser and guiding air which has passed through the diffuser toward the rear vane.
  • Figure 3 is a perspective view of a vacuum cleaner in accordance with the present invention
  • Figure 4 is a sectional view of a main body of the vacuum cleaner in accordance with the present invention.
  • a cleaner in accordance with the present invention includes a cleaner body 14 having a dust collection filter 10 and a centrifugal fan 12, an extension pipe 18 connected with the cleaner body 14 by a suction hose 16, and a suction nozzle 20 mounted at an end portion of the extension pipe 18 and sucking dust and debris from the floor.
  • the cleaner body 14 includes a first chamber 24 having a connection part 22 formed at a front side thereof to which the suction hose 16 is connected and a dust collection filter 10 installed therein, and a second chamber 26 having the centrifugal fan 12 installed therein.
  • a filter 28 is mounted at a suction side of the second chamber 26 and an exhaust hole 30 is formed to externally discharge air discharged from the centrifugal fan 12.
  • the centrifugal fan 12 includes an impeller casing 52having a suction opening 50 formed at its front side, a motor housing 56 mounted at a lower side of the impeller casing 52 and having a discharge hole 54 for discharging air, a driving motor 58 installed in the motor housing 56 and generating a rotational force, an impeller 62 rotatably disposed at the impeller casing 52 and connected with the driving motor by a rotational shaft 60 to generate an air blowing force, and a guide vane 68 rotatably disposed at a rear side of the impeller 62, increasing a static pressure of air sent from the impeller 62, and guiding air sent from the impeller 62 so as to pass through the driving motor 58 to the discharge hole 54.
  • the driving motor 58 includes a stator 70 fixed on an inner circumferential surface of the motor housing 56, to which power is applied, and a rotor 72 disposed at an inner circumferential surface of the stator 70, rotated by an electromagnetic force when power is applied to the stator 70.
  • the rotational shaft 60 is fixed at the rotor 72.
  • the impeller 62 includes a hub 64 fixed at the rotational shaft 60 by a holder 74 and a plurality of blades 66 connected at an outer circumferential surface of the hub 64 at equal intervals and sending air in a radial direction.
  • Figure 6 is a perspective view of a guide vane of the centrifugal fan in accordance with the present invention
  • Figure 7 is an enlarged view of a portion 'A' of Figure 6.
  • the guide vane 68 includes a plate-type partition plate disposed at a lower side of the impeller 62, defusers 80 formed at equal intervals at an edge portion of an upper surface of the partition plate, arranged at a certain interval from an outer circumferential surface of the blades 66 of the impeller, and increasing a static pressure of air sent from the impeller 62, a rear vane 84 formed at a lower surface of the partition plate 82 and guiding air discharged from the diffusers 80 to pass through the driving motor 58, and air guiding members 90 formed on an outer surface of the diffusers 80 at equal intervals and forcibly introducing air which has passed the diffusers toward the rear vane 84 in order to reduce a flow loss.
  • the diffusers 80 includes a plurality of diffuser blades 80a disposed to overlap with a certain interval therebetween at the edge portion of the upper surface of the partition plate 82 in a circumferential direction, and a passage 86 is formed between the diffuser blades 80a to allow air to pass therethrough.
  • a passage 86 an area of an exit side through which air is discharged to the rear vane 84 is larger than an area of an entrance side at which air sent from the impeller 62 is introduced, whereby air can spread to increase its static pressure and reduce air flow rate.
  • the air guiding member 90 is formed at the side of each of the defuser blades 80a.
  • the air guiding member 90 is formed as an air-foil type plate at an outer side of each diffuser blade 80a in a right angle direction.
  • the air guiding member 90 is formed to be tilt downwardly at the exit side of the passage 86 of the diffuser 80.
  • One side of the air guiding member 90 is integrally formed with the side of the diffuser blade 80a, and the other side thereof contacts with the inner circumferential surface of the impeller casing 52.
  • the rear vane 84 is formed in a spiral form in an outer direction at a lower surface of the partition plate 82 in order to guide air whose static pressure has been increased while passing through the diffuser 80 to the driving motor 58.
  • the rotor 72 When power is applied to the driving motor, the rotor 72 is rotated according to interaction of the rotor 72 and the stator 70, and accordingly, the rotational shaft 60 connected with the rotor 72 is rotated to rotate the impeller 62. Then, air is sucked through the suction opening 50, and the sucked air is sent in a radial direction by the blades 66, passes through the passage 86 between diffuser blades 80a, during which its static pressure is increased.
  • air guided by the rear vane 84 performs a cooling operation on the driving motor 58 while passing between the stator 70 and the rotor 72 of the driving motor 58 and then is discharged externally through the discharge hole 54 formed at the motor housing 56.
  • Figures 8 to 10 are graphs showing performance between the centrifugal fan in accordance with the present invention and that of the conventional art.
  • the vacuum degree of the centrifugal fan in accordance with the present invention is higher than that of the related art centrifugal fan in the aspect of high air volume.
  • power of the centrifugal fan in accordance with the present invention is higher than that of the related art centrifugal fan in the aspect of high air volume.
  • efficiency of the centrifugal fan in accordance with the present invention is higher than that of the related art centrifugal fan in the aspect of high air volume.
  • the centrifugal fan and a cleaner having the centrifugal fan in accordance with the present invention have the following advantages.
  • the air guiding member in the air-foil shape is formed at the outer side of the diffuser blade of the diffuser, air which has passed through the diffuser is forcibly introduced to the lower side of the partition plate. Accordingly, a flow loss caused as air is re-circulated to the upper side of the partition plate after passing through the diffuser can be reduced, and thus, a suction force and efficiency of the centrifugal fan can be enhanced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP05291532A 2004-07-20 2005-07-18 Zentrifugalgebläse und Staubsauger umfassend ein solches Zentrifugalgebläse Expired - Fee Related EP1618821B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020040056491A KR20060007637A (ko) 2004-07-20 2004-07-20 진공청소기용 팬-모터의 가이드 베인 구조

Publications (3)

Publication Number Publication Date
EP1618821A2 true EP1618821A2 (de) 2006-01-25
EP1618821A3 EP1618821A3 (de) 2006-06-07
EP1618821B1 EP1618821B1 (de) 2009-10-28

Family

ID=35115756

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05291532A Expired - Fee Related EP1618821B1 (de) 2004-07-20 2005-07-18 Zentrifugalgebläse und Staubsauger umfassend ein solches Zentrifugalgebläse

Country Status (4)

Country Link
EP (1) EP1618821B1 (de)
KR (1) KR20060007637A (de)
CN (1) CN100489316C (de)
DE (1) DE602005017332D1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1878376A2 (de) * 2006-07-12 2008-01-16 Johnson Electric S.A. Staubsaugergebläse mit Schaufeln aufweisendem Diffusor
US9142804B2 (en) 2010-02-09 2015-09-22 Samsung Display Co., Ltd. Organic light-emitting device including barrier layer and method of manufacturing the same

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101108166B1 (ko) * 2010-02-09 2012-01-31 삼성모바일디스플레이주식회사 실리콘 산화물막과 실리콘 리치 실리콘 질화물막을 포함하는 배리어층을 포함하는 유기 발광 장치
US20120186036A1 (en) * 2011-01-25 2012-07-26 Kegg Steven W Diffuser for a vacuum cleaner motor-fan assembly
JP2020112145A (ja) * 2019-01-17 2020-07-27 日立グローバルライフソリューションズ株式会社 電動送風機及びそれを備えた電気掃除機
CN110336440B (zh) * 2019-05-09 2020-08-11 宁波大华电器有限公司 一种吸尘器用无刷电机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0525366A2 (de) * 1991-06-18 1993-02-03 Kuraco Limited Fettextraktor
EP0556895A1 (de) * 1992-02-17 1993-08-25 Koninklijke Philips Electronics N.V. Einrichtung, um ein gasförmiges oder flüssiges Medium von einem Ort zum anderen zu bringen, sowie mit einer derartigen Einrichtung versehener Staubsauger
DE19606146A1 (de) * 1996-02-20 1997-08-21 Vorwerk Co Interholding Schnellaufender Elektromotor
DE29717906U1 (de) * 1997-10-08 1999-02-04 Bosch Siemens Hausgeraete Gebläse
EP1297772A2 (de) * 2001-09-26 2003-04-02 Lg Electronics Inc. Kreiselgebläse für Staubsauger
GB2388017A (en) * 2002-04-30 2003-11-05 Johnson Electric Sa Diffuser plate

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0525366A2 (de) * 1991-06-18 1993-02-03 Kuraco Limited Fettextraktor
EP0556895A1 (de) * 1992-02-17 1993-08-25 Koninklijke Philips Electronics N.V. Einrichtung, um ein gasförmiges oder flüssiges Medium von einem Ort zum anderen zu bringen, sowie mit einer derartigen Einrichtung versehener Staubsauger
DE19606146A1 (de) * 1996-02-20 1997-08-21 Vorwerk Co Interholding Schnellaufender Elektromotor
DE29717906U1 (de) * 1997-10-08 1999-02-04 Bosch Siemens Hausgeraete Gebläse
EP1297772A2 (de) * 2001-09-26 2003-04-02 Lg Electronics Inc. Kreiselgebläse für Staubsauger
GB2388017A (en) * 2002-04-30 2003-11-05 Johnson Electric Sa Diffuser plate

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1878376A2 (de) * 2006-07-12 2008-01-16 Johnson Electric S.A. Staubsaugergebläse mit Schaufeln aufweisendem Diffusor
EP1878376A3 (de) * 2006-07-12 2010-12-22 Johnson Electric S.A. Staubsaugergebläse mit Schaufeln aufweisendem Diffusor
US8152488B2 (en) 2006-07-12 2012-04-10 Johnson Electric S.A. Blower
US9142804B2 (en) 2010-02-09 2015-09-22 Samsung Display Co., Ltd. Organic light-emitting device including barrier layer and method of manufacturing the same
US9324776B2 (en) 2010-02-09 2016-04-26 Samsung Display Co., Ltd. Organic light-emitting device including barrier layer including silicon oxide layer and silicon nitride layer

Also Published As

Publication number Publication date
EP1618821B1 (de) 2009-10-28
EP1618821A3 (de) 2006-06-07
KR20060007637A (ko) 2006-01-26
CN100489316C (zh) 2009-05-20
DE602005017332D1 (de) 2009-12-10
CN1724878A (zh) 2006-01-25

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