US20070231130A1 - Centrifugal fan - Google Patents

Centrifugal fan Download PDF

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Publication number
US20070231130A1
US20070231130A1 US11/685,326 US68532607A US2007231130A1 US 20070231130 A1 US20070231130 A1 US 20070231130A1 US 68532607 A US68532607 A US 68532607A US 2007231130 A1 US2007231130 A1 US 2007231130A1
Authority
US
United States
Prior art keywords
centrifugal fan
casing
motor
impeller
dust proof
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.)
Abandoned
Application number
US11/685,326
Other languages
English (en)
Inventor
Akira Hanazuka
Morio Senba
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.)
Nidec Advanced Motor Corp
Original Assignee
Japan Servo 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 Japan Servo Corp filed Critical Japan Servo Corp
Assigned to JAPAN SERVO CO., LTD. reassignment JAPAN SERVO CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HANAZUKA, AKIRA, SENBA, MORIO
Publication of US20070231130A1 publication Critical patent/US20070231130A1/en
Abandoned legal-status Critical Current

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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
    • F04D29/08—Sealings
    • F04D29/083—Sealings especially adapted for elastic fluid pumps
    • 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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning

Definitions

  • the present invention relates to a centrifugal fan used to cool, for example, a battery of a hybrid car, and more particularly to a centrifugal fan having a dust proof structure.
  • JP-A Japanese Patent Application Laid-Open (JP-A) No. 2005-291050 discloses a centrifugal fan that is often used to cool heat generation elements of, for example, OA equipment as an example of a centrifugal fan.
  • the conventional centrifugal fan will be explained using FIG. 3 .
  • FIG. 3 is a longitudinal side elevational view showing an arrangement of the conventional centrifugal fan.
  • the conventional centrifugal fan 100 is composed of a casing 110 , a rotatable impeller 140 disposed in the casing 110 , a motor 120 for driving the impeller 140 , and a control board 130 of the motor 120 .
  • the impeller 140 is mainly composed of a blade 142 and a hub 144 .
  • the motor 120 includes a rotor 122 , a coil 124 , a stator 125 , and a rotating shaft 126 .
  • a centrifugal fan used to cool a battery has a high flow path resistance due to gas tightness, it is often used at high static pressure, and thus a suction flow (reverse flow) may be caused from a port originally used as an ejection port.
  • FIG. 4 shows how sucked air flows as a result of computer analysis of the suction flow.
  • FIG. 4 is a front elevational view showing a result of analysis of wind directions and amounts of wind when suction flows are caused from an ejection port 100 b in the conventional centrifugal fan 100 .
  • JP-A-2002-61596 discloses a centrifugal fan.
  • the centrifugal fan has a labyrinth structure formed to a second side wall of a casing and to respective confronting wall portions of an impeller which confront with each other in the axial direction of a blade support member of the impeller.
  • the labyrinth structure is provided to prevent water from invading into a space formed between a cup-shaped member and the second side wall from the outside of a rotating shaft in the radial direction thereof.
  • An object of the invention disclosed in JP-A-2002-61596 is to prevent water invasion, and this object is different from the dust-proofing measure of the present invention.
  • the shape disclosed in JP-A-2002-61596 is applied to the present invention as it is, the following problems may arise:
  • a labyrinth structure must be designed to both the impeller and the housing;
  • an object of the present invention is to overcome the above problems and to provide a centrifugal fan which can decrease dusts invading to a coil portion and a control board of a motor while reducing a cost by a simple arrangement.
  • a centrifugal fan includes a casing, a rotatable impeller disposed in the casing, a motor for driving the impeller, a control board for controlling the motor, and an ejection port for cooling air, wherein a dust proof projection is formed to the casing to prevent invasion of dusts from the ejection port to the motor and the control board.
  • a centrifugal fan includes a casing, a rotatable impeller disposed in the casing, a motor for driving the impeller, a control board for controlling the motor, and an ejection port for cooling air, wherein a dust proof projection is attached to the casing to prevent invasion of dusts from the ejection port to the motor and the control board.
  • the dust proof projection may be disposed to a gap between the inner peripheral surface of a side wall of the casing and the outer peripheral surface of the impeller along the outer peripheral surface of the impeller in an arc-shape.
  • the dust proof projection may be disposed in the vicinity of the ejection port of the centrifugal fan as well as a center angle of the arc-shape thereof is 20° to 90° and preferably about 45°.
  • an extreme end portion of the dust proof projection may be formed in a substantially wedge shape.
  • FIG. 1 is a front elevational view showing a basic arrangement of a centrifugal fan of an embodiment of the present invention
  • FIG. 2 is a longitudinal side elevational view showing the basic arrangement of the centrifugal fan of the embodiment of the invention
  • FIG. 3 is a longitudinal side elevational view showing an arrangement of a conventional centrifugal fan.
  • FIG. 4 is a front elevational view of the conventional centrifugal fan showing a result of analysis of wind directions and velocity of wind when suction flows are caused from an ejection port.
  • FIGS. 1 and 2 an embodiment a centrifugal fan of the present invention will be explained using FIGS. 1 and 2 and referring to FIG. 3 .
  • centrifugal fan of the embodiment of the invention is a centrifugal fan of the embodiment of the invention.
  • FIG. 2 is a longitudinal side elevational view showing the basic arrangement of the centrifugal fan of the embodiment of the invention.
  • FIGS. 1 and 2 the basic arrangement of the centrifugal fan of the embodiment will be explained using FIGS. 1 and 2 .
  • the centrifugal fan 10 of the embodiment is composed of a casing 12 , a rotatable impeller 20 disposed in the casing 12 , a motor 30 for driving the impeller 20 , a control board 40 for controlling the motor 30 , and an ejection port 10 b for cooling air likewise the conventional centrifugal fan.
  • reference numeral 32 denotes a rotor of the motor 30
  • 34 denotes a stator thereof.
  • the centrifugal fan 10 of the present invention is characterized in that a dust proof projection 14 is formed to the casing 12 to prevent invasion of dusts from the ejection port 10 b to the motor 30 and the control board 40 .
  • the dust proof projection 14 is disposed to a gap between the inner peripheral surface of a side wall of the casing 12 and the outer peripheral surface of the impeller 20 along the outer peripheral surface of the impeller 20 in an arc-shape.
  • the dust proof projection 14 is disposed in the vicinity of the ejection port 10 b of the centrifugal fan 10 and has the arc shape having a center angle of about 45° and an extreme end portion 14 a formed in a substantially wedge shape.
  • suction flows may be caused as shown in FIG. 4 .
  • the dust proof projection 14 prevents invasion of dusts to the motor 30 and the control board 40 by forming the dust proof projection 14 having the above shape to the above portion of the housing 22 as apparent from FIG. 4 .
  • the dust proof effect of the dust proof projection 14 can be more increased by disposing the arc-shaped dust proof projection 14 in the vicinity of the ejection port 10 b of the centrifugal fan 10 and setting the center angle ⁇ of the arc shape thereof to about 45°.
  • a dust collecting property for collecting dusts to the extreme end portion 14 a of the dust proof projection 14 can be enhanced by forming the extreme end portion 14 a to the substantially wedge shape, which is more effective to dust proof.
  • the centrifugal fan of the present invention is by no means limited to the above embodiment and can be variously modified.
  • the present invention has been explained as to the example in which the dust proof projection is formed together with the casing, it is needles to say that a case in which the dust proof projection is attached to the casing after the casing is formed is included in the present invention.
  • the shape of the dust proof projection and the position at which the dust proof projection is attached are not limited to those of the above embodiment.
  • centrifugal fan of the present invention Since the centrifugal fan of the present invention is arranged as described above, it has excellent advantages as described below.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US11/685,326 2006-03-30 2007-03-13 Centrifugal fan Abandoned US20070231130A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-093814 2006-03-30
JP2006093814A JP2007270631A (ja) 2006-03-30 2006-03-30 遠心ファン

Publications (1)

Publication Number Publication Date
US20070231130A1 true US20070231130A1 (en) 2007-10-04

Family

ID=38141328

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/685,326 Abandoned US20070231130A1 (en) 2006-03-30 2007-03-13 Centrifugal fan

Country Status (4)

Country Link
US (1) US20070231130A1 (de)
EP (1) EP1840384A2 (de)
JP (1) JP2007270631A (de)
CN (1) CN101046213A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090148293A1 (en) * 2007-12-06 2009-06-11 Wen-San Lin Dust collector blade structure
US20100078007A1 (en) * 2007-11-06 2010-04-01 Rbc Horizon, Inc. High Efficiency Furnace/Air Handler Blower Housing with a Side Wall Having an Exponentially Increasing Expansion Angle
US20100275560A1 (en) * 2009-05-04 2010-11-04 Wistron Corporation Housing for a centrifugal fan, the centrifugal fan, and electronic device having the centrifugal fan
US9017011B2 (en) 2011-12-29 2015-04-28 Regal Beloit America, Inc. Furnace air handler blower with enlarged backward curved impeller and associated method of use
US10355562B2 (en) 2015-04-24 2019-07-16 Siemens Aktiengesellschaft Slip-ring arrangement with spiral fan
DE102018122774A1 (de) * 2018-09-17 2020-03-19 Lenze Drives Gmbh Motorlüfter und Verwendung eines Motorlüfters

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI487841B (zh) * 2011-05-12 2015-06-11 Adda Corp 散熱風扇
JP2014055531A (ja) * 2012-09-11 2014-03-27 Nippon Densan Corp 遠心ファン
JP5897515B2 (ja) * 2013-08-06 2016-03-30 シナノケンシ株式会社 送風装置
JP2020020338A (ja) * 2018-07-18 2020-02-06 サンデン・オートモーティブクライメイトシステム株式会社 送風機
JP7423958B2 (ja) * 2019-09-27 2024-01-30 ニデック株式会社 送風装置

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2841326A (en) * 1954-06-14 1958-07-01 Trane Co Centrifugal fan
US3166394A (en) * 1961-04-12 1965-01-19 Arthur R Adams Self-dumping centrifugal separator
US3221983A (en) * 1963-12-06 1965-12-07 New York Blower Company Centrifugal fan
US3289596A (en) * 1964-09-08 1966-12-06 Springer Frederick Howard Combination centrifugal and turbine pump
US4182596A (en) * 1978-02-16 1980-01-08 Carrier Corporation Discharge housing assembly for a vane axial fan
US4475868A (en) * 1981-12-08 1984-10-09 Emile Egger & Cie Sa Free-flow-pump
US5000769A (en) * 1989-04-14 1991-03-19 Brevet System for ventilating a rail traction motor and for dynamically purifying the ventilation air
US5842840A (en) * 1996-03-26 1998-12-01 Valeo Climatisation Centrifugal fan with an integrated control module especially for use in motor vehicles
US20050207888A1 (en) * 2004-03-17 2005-09-22 Japan Servo Co., Ltd. Centrifugal fan and casing thereof
US20060171802A1 (en) * 2005-01-28 2006-08-03 Japan Servo Co., Ltd. Centrifugal fan impeller

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2841326A (en) * 1954-06-14 1958-07-01 Trane Co Centrifugal fan
US3166394A (en) * 1961-04-12 1965-01-19 Arthur R Adams Self-dumping centrifugal separator
US3221983A (en) * 1963-12-06 1965-12-07 New York Blower Company Centrifugal fan
US3289596A (en) * 1964-09-08 1966-12-06 Springer Frederick Howard Combination centrifugal and turbine pump
US4182596A (en) * 1978-02-16 1980-01-08 Carrier Corporation Discharge housing assembly for a vane axial fan
US4475868A (en) * 1981-12-08 1984-10-09 Emile Egger & Cie Sa Free-flow-pump
US5000769A (en) * 1989-04-14 1991-03-19 Brevet System for ventilating a rail traction motor and for dynamically purifying the ventilation air
US5842840A (en) * 1996-03-26 1998-12-01 Valeo Climatisation Centrifugal fan with an integrated control module especially for use in motor vehicles
US20050207888A1 (en) * 2004-03-17 2005-09-22 Japan Servo Co., Ltd. Centrifugal fan and casing thereof
US20060171802A1 (en) * 2005-01-28 2006-08-03 Japan Servo Co., Ltd. Centrifugal fan impeller

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100078007A1 (en) * 2007-11-06 2010-04-01 Rbc Horizon, Inc. High Efficiency Furnace/Air Handler Blower Housing with a Side Wall Having an Exponentially Increasing Expansion Angle
US20100263653A2 (en) * 2007-11-06 2010-10-21 Rbc Horizon, Inc. High Efficiency Furnace/Air Handler Blower Housing with a Side Wall Having an Exponentially Increasing Expansion Angle
US8550066B2 (en) * 2007-11-06 2013-10-08 Regal Beloit America, Inc. High efficiency furnace/air handler blower housing with a side wall having an exponentially increasing expansion angle
US9513029B2 (en) 2007-11-06 2016-12-06 Regal Beloit America, Inc. High efficiency furnace/air handler blower housing with a side wall having an exponentially increasing expansion angle
US20090148293A1 (en) * 2007-12-06 2009-06-11 Wen-San Lin Dust collector blade structure
US20100275560A1 (en) * 2009-05-04 2010-11-04 Wistron Corporation Housing for a centrifugal fan, the centrifugal fan, and electronic device having the centrifugal fan
US8152881B2 (en) * 2009-05-04 2012-04-10 Wistron Corporation Housing for a centrifugal fan, the centrifugal fan, and electronic device having the centrifugal fan
US9017011B2 (en) 2011-12-29 2015-04-28 Regal Beloit America, Inc. Furnace air handler blower with enlarged backward curved impeller and associated method of use
US10355562B2 (en) 2015-04-24 2019-07-16 Siemens Aktiengesellschaft Slip-ring arrangement with spiral fan
DE102018122774A1 (de) * 2018-09-17 2020-03-19 Lenze Drives Gmbh Motorlüfter und Verwendung eines Motorlüfters

Also Published As

Publication number Publication date
EP1840384A2 (de) 2007-10-03
JP2007270631A (ja) 2007-10-18
CN101046213A (zh) 2007-10-03

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Legal Events

Date Code Title Description
AS Assignment

Owner name: JAPAN SERVO CO., LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HANAZUKA, AKIRA;SENBA, MORIO;REEL/FRAME:019002/0231

Effective date: 20070131

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION