US20070231130A1 - Centrifugal fan - Google Patents
Centrifugal fan Download PDFInfo
- 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
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.
- 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.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
In a centrifugal fan including 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, 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. With this simple arrangement, invasion of dusts to a coil portion and a control board of the motor can be reduced while suppressing a manufacturing cost. In this case, when the dust proof projection is 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, a dust proof effect can be more improved.
Description
- 1. Field of the Invention
- 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.
- 2. Description of the Related Art
- 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. - As shown in
FIG. 3 , the conventionalcentrifugal fan 100 is composed of acasing 110, arotatable impeller 140 disposed in thecasing 110, amotor 120 for driving theimpeller 140, and acontrol board 130 of themotor 120. - Further, the
impeller 140 is mainly composed of ablade 142 and ahub 144. - Further, as shown in
FIG. 3 , themotor 120 includes arotor 122, acoil 124, astator 125, and arotating shaft 126. - Incidentally, since 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.
- In particular, in a centrifugal fan used in a dust-containing atmosphere, dusts are deposited on a coil portion and a control board of a motor by suction flows. Consequently, a problem arises in that when the deposited dusts contain moisture, the centrifugal fan may be failed by the deposited dusts.
-
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 anejection port 100 b in the conventionalcentrifugal fan 100. - As shown in
FIG. 4 , it can be understood that the suction flows gather to the vicinity of the rotatingshaft 126 of the motor. - Accordingly, in the centrifugal fan used to cool the battery, it is important to provide the coil portion and the control board of the motor with a dust proof structure against the suction flow.
- Although it is effective to simply narrow a gap between an impeller and a housing as a dust-proofing measure, it is difficult to employ the measure due to a problem of accuracy of parts such as vibration of an impeller surface, and the like.
- Further, since dusts clog the narrowed gap, there is a possibility that centrifugal fan operates defectively in its entirety.
- To cope with the above problem, 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. However, when the shape disclosed in JP-A-2002-61596 is applied to the present invention as it is, the following problems may arise:
- (1) First, a labyrinth structure must be designed to both the impeller and the housing; and
- (2) Next, since the shape of a mold for molding the housing becomes complex, a cost for manufacturing the mold increase.
- Accordingly, 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 according to a first aspect of the invention 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 according to a second aspect of the invention 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.
- and the control board.
- In a centrifugal fan according to a third aspect of the invention, 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.
- In a centrifugal fan according to a fourth aspect of the invention, 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°.
- In a centrifugal fan according to a fifth aspect of the invention, 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; and -
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. - Hereinafter, an embodiment a centrifugal fan of the present invention will be explained using
FIGS. 1 and 2 and referring toFIG. 3 . - 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. - First, 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 acasing 12, arotatable impeller 20 disposed in thecasing 12, amotor 30 for driving theimpeller 20, acontrol board 40 for controlling themotor 30, and anejection port 10 b for cooling air likewise the conventional centrifugal fan. - Note that, in
FIG. 2 ,reference numeral 32 denotes a rotor of themotor - As shown in
FIGS. 1 and 2 , thecentrifugal fan 10 of the present invention is characterized in that adust proof projection 14 is formed to thecasing 12 to prevent invasion of dusts from theejection port 10 b to themotor 30 and thecontrol board 40. - Further, the
dust proof projection 14 is disposed to a gap between the inner peripheral surface of a side wall of thecasing 12 and the outer peripheral surface of theimpeller 20 along the outer peripheral surface of theimpeller 20 in an arc-shape. - More specifically, the
dust proof projection 14 is disposed in the vicinity of theejection port 10 b of thecentrifugal fan 10 and has the arc shape having a center angle of about 45° and anextreme end portion 14 a formed in a substantially wedge shape. - Next, a basic operation of the
centrifugal fan 10 of the embodiment arranged as described above will be explained. - When, for example, the
centrifugal fan 10 is used to cool a battery as described above, suction flows may be caused as shown inFIG. 4 . - Accordingly, it can be easily understood that the
dust proof projection 14 prevents invasion of dusts to themotor 30 and thecontrol board 40 by forming thedust proof projection 14 having the above shape to the above portion of the housing 22 as apparent fromFIG. 4 . - In particular, the dust proof effect of the
dust proof projection 14 can be more increased by disposing the arc-shapeddust proof projection 14 in the vicinity of theejection port 10 b of thecentrifugal fan 10 and setting the center angle θ of the arc shape thereof to about 45°. - Further, a dust collecting property for collecting dusts to the
extreme end portion 14 a of thedust proof projection 14 can be enhanced by forming theextreme 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.
- First, although 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.
- Further, it is needless to say that 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.
- Since the centrifugal fan of the present invention is arranged as described above, it has excellent advantages as described below.
- (1) When the centrifugal fan is arranged as disclosed in the first and second aspects of the invention, dusts invading to the coil portion and the control board of the motor can be reduced with a very simple arrangement.
- (2) Since the centrifugal fan is arranged very simply, it is not necessary to design a labyrinth structure to both the impeller and the housing.
- (3) Further, since it is not almost necessary to modify the shape of a mold for molding the housing, an increase of a manufacturing cost can be minimized.
- (4) When the shape of the dust proof projection is formed as disclosed in the third to fifth aspects of the invention, the dust proof effect can be more improved.
Claims (5)
1. A centrifugal fan comprising 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.
2. A centrifugal fan comprising 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.
3. A centrifugal fan according to claim 1 or 2 , wherein the dust proof projection is 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.
4. A centrifugal fan according to claim 3 , wherein the dust proof projection is 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°.
5. A centrifugal fan according to claims 1 to 4 , wherein an extreme end portion of the dust proof projection is formed in a substantially wedge shape.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-093814 | 2006-03-30 | ||
JP2006093814A JP2007270631A (en) | 2006-03-30 | 2006-03-30 | Centrifugal fan |
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 (en) |
EP (1) | EP1840384A2 (en) |
JP (1) | JP2007270631A (en) |
CN (1) | CN101046213A (en) |
Cited By (6)
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 (en) * | 2018-09-17 | 2020-03-19 | Lenze Drives Gmbh | Engine fan and use of an engine fan |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI487841B (en) * | 2011-05-12 | 2015-06-11 | Adda Corp | Heat dissipation fan |
JP2014055531A (en) * | 2012-09-11 | 2014-03-27 | Nippon Densan Corp | Centrifugal fan |
JP5897515B2 (en) * | 2013-08-06 | 2016-03-30 | シナノケンシ株式会社 | Blower |
JP2020020338A (en) * | 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 | Air blower |
JP7423958B2 (en) * | 2019-09-27 | 2024-01-30 | ニデック株式会社 | Air blower |
Citations (10)
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---|---|---|---|---|
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 |
-
2006
- 2006-03-30 JP JP2006093814A patent/JP2007270631A/en active Pending
-
2007
- 2007-03-13 US US11/685,326 patent/US20070231130A1/en not_active Abandoned
- 2007-03-13 EP EP07251035A patent/EP1840384A2/en not_active Withdrawn
- 2007-03-15 CN CNA2007100881199A patent/CN101046213A/en active Pending
Patent Citations (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 |
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)
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 (en) * | 2018-09-17 | 2020-03-19 | Lenze Drives Gmbh | Engine fan and use of an engine fan |
Also Published As
Publication number | Publication date |
---|---|
CN101046213A (en) | 2007-10-03 |
EP1840384A2 (en) | 2007-10-03 |
JP2007270631A (en) | 2007-10-18 |
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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 |