EP1840384A2 - Centrifugal fan - Google Patents
Centrifugal fan Download PDFInfo
- Publication number
- EP1840384A2 EP1840384A2 EP07251035A EP07251035A EP1840384A2 EP 1840384 A2 EP1840384 A2 EP 1840384A2 EP 07251035 A EP07251035 A EP 07251035A EP 07251035 A EP07251035 A EP 07251035A EP 1840384 A2 EP1840384 A2 EP 1840384A2
- Authority
- EP
- European Patent Office
- 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.)
- Withdrawn
Links
- 239000000428 dust Substances 0.000 claims abstract description 33
- 230000002093 peripheral effect Effects 0.000 claims abstract description 12
- 230000009545 invasion Effects 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
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.
- 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 wind velocities when suction flows between an impeller hub and a casing are caused from an ejection port 100b 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 as it is, the following problems may arise:
- 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.
- 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.
- FIG. 1 is a front elevational view showing a basic arrangement of the 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.
- 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 10b for cooling air likewise the conventional centrifugal fan.
- reference numeral 32 denotes a rotor of the motor 30, and 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 10b 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 10b of the centrifugal fan 10 and has the arc shape having a center angle of about 45° and an extreme end portion 14a 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 10b 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 14a of the dust proof projection 14 can be enhanced by forming the extreme end portion 14a 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 embodiment Since the centrifugal fan of the present embodiment is arranged as described above, it has excellent advantages as described below.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006093814A JP2007270631A (ja) | 2006-03-30 | 2006-03-30 | 遠心ファン |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1840384A2 true EP1840384A2 (en) | 2007-10-03 |
Family
ID=38141328
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07251035A Withdrawn EP1840384A2 (en) | 2006-03-30 | 2007-03-13 | Centrifugal fan |
Country Status (4)
Country | Link |
---|---|
US (1) | US20070231130A1 (zh) |
EP (1) | EP1840384A2 (zh) |
JP (1) | JP2007270631A (zh) |
CN (1) | CN101046213A (zh) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103671208A (zh) * | 2012-09-11 | 2014-03-26 | 日本电产株式会社 | 离心风扇 |
TWI487841B (zh) * | 2011-05-12 | 2015-06-11 | Adda Corp | 散熱風扇 |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
US20090148293A1 (en) * | 2007-12-06 | 2009-06-11 | Wen-San Lin | Dust collector blade structure |
TWM366611U (en) * | 2009-05-04 | 2009-10-11 | Wistron Corp | Centrifugal fan housing, 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 |
JP5897515B2 (ja) * | 2013-08-06 | 2016-03-30 | シナノケンシ株式会社 | 送風装置 |
EP3086447A1 (de) | 2015-04-24 | 2016-10-26 | Siemens Aktiengesellschaft | Schleifringanordnung mit spirallüfter |
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 |
DE102018122774A1 (de) * | 2018-09-17 | 2020-03-19 | Lenze Drives Gmbh | Motorlüfter und Verwendung eines Motorlüfters |
JP7423958B2 (ja) * | 2019-09-27 | 2024-01-30 | ニデック株式会社 | 送風装置 |
Family Cites Families (10)
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 |
MX157817A (es) * | 1981-12-08 | 1988-12-15 | Emule Egger & Cie S A | Mejoras a bomba rotativa de circulacion libre de fluidos |
FR2645817B1 (fr) * | 1989-04-14 | 1992-01-10 | Alsthom Gec | Dispositif de ventilation de moteur de traction ferroviaire et d'epuration dynamique de l'air de ventilation |
FR2746864B1 (fr) * | 1996-03-26 | 1998-05-22 | Valeo Climatisation | Ventilateur centrifuge a module de commande integre, notamment pour vehicule automobile |
US7207774B2 (en) * | 2004-03-17 | 2007-04-24 | Japan Servo Co., Ltd. | Centrifugal fan and casing thereof |
JP4292417B2 (ja) * | 2005-01-28 | 2009-07-08 | 日本電産サーボ株式会社 | 遠心ファンのインペラ |
-
2006
- 2006-03-30 JP JP2006093814A patent/JP2007270631A/ja active Pending
-
2007
- 2007-03-13 EP EP07251035A patent/EP1840384A2/en not_active Withdrawn
- 2007-03-13 US US11/685,326 patent/US20070231130A1/en not_active Abandoned
- 2007-03-15 CN CNA2007100881199A patent/CN101046213A/zh active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI487841B (zh) * | 2011-05-12 | 2015-06-11 | Adda Corp | 散熱風扇 |
CN103671208A (zh) * | 2012-09-11 | 2014-03-26 | 日本电产株式会社 | 离心风扇 |
Also Published As
Publication number | Publication date |
---|---|
JP2007270631A (ja) | 2007-10-18 |
US20070231130A1 (en) | 2007-10-04 |
CN101046213A (zh) | 2007-10-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1840384A2 (en) | Centrifugal fan | |
EP1707822B1 (en) | Centrifugal fan | |
JP5945912B2 (ja) | ファン | |
JP6260481B2 (ja) | 遠心送風機 | |
US9039360B2 (en) | Centrifugal fan | |
CN107614889B (zh) | 送风装置以及吸尘器 | |
JP4337669B2 (ja) | 車両用電動送風ファン装置 | |
US20050207888A1 (en) | Centrifugal fan and casing thereof | |
JP2007239712A (ja) | 遠心ファン | |
JP2011080427A (ja) | 電動送風機及びそれを用いた電気掃除機 | |
JP2008128008A (ja) | ファン装置 | |
JP2009108792A (ja) | ファン装置 | |
JP2014136997A (ja) | 汚れ固着防止機能を有するファンモータおよびファンモータを有する装置 | |
US11332052B2 (en) | Centrifugal blower device | |
JP6818443B2 (ja) | 電動送風機及びそれを備えた電気掃除機 | |
US20190390676A1 (en) | Centrifugal blower device | |
JP6151382B2 (ja) | 多段電動遠心圧縮機 | |
JP2008106611A (ja) | 遠心ファン | |
JP6460957B2 (ja) | 遠心ファン | |
JP5017965B2 (ja) | 送風機および送風機を備えた冷却機器 | |
JP2008180124A (ja) | ファン装置 | |
US11448077B2 (en) | Method for manufacturing turbo fan | |
EP4056857A1 (en) | Blower | |
JP5040997B2 (ja) | 真空ポンプ | |
JP6386990B2 (ja) | 遠心ファン |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA HR MK YU |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20091001 |