US20070128052A1 - Centrifugal fan - Google Patents

Centrifugal fan Download PDF

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Publication number
US20070128052A1
US20070128052A1 US11/555,361 US55536106A US2007128052A1 US 20070128052 A1 US20070128052 A1 US 20070128052A1 US 55536106 A US55536106 A US 55536106A US 2007128052 A1 US2007128052 A1 US 2007128052A1
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United States
Prior art keywords
centrifugal fan
impeller
depression
base
central axis
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
US11/555,361
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English (en)
Inventor
Shigeyuki MORIYA
Shoki YAMAZAKI
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 Corp
Original Assignee
Nidec 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 Nidec Corp filed Critical Nidec Corp
Assigned to NIDEC CORPORATION reassignment NIDEC CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MORIYA, SHIGEYUKI, YAMAZAKI, SHOKI
Publication of US20070128052A1 publication Critical patent/US20070128052A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
    • 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
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system

Definitions

  • the present invention relates to a motorized centrifugal fan to be used for air blasting.
  • a centrifugal fan for taking in air in an axial direction and discharging the air in a radial direction
  • an impeller having a plurality of blades arranged in a circumferential direction with a rotational axis as the center, and while a cup-shaped portion provided at the midsection of the impeller has a field magnet on its inside surface, a cylindrical metal yoke having magnetism is pressed and fitted to the cup portion, to make the impeller rotatable around the rotational axis.
  • a variety of devices are comprised in the centrifugal fan as thus described in order to reduce noise, improve an air volume characteristic, and suppress performance degradation with the increase in temperature of a motor.
  • a rotational speed of a recent centrifugal fan for cooling is on the increase, and since a current of a motor housed inside the centrifugal fan increases with the increase in rotational speed, temperatures of an armature and an electronic component tend to increase in too large a degree to be ignored.
  • a centrifugal fan of the present invention comprises: a substantially bottomed cylindrical cup portion, including a cylindrical yoke portion with a prescribed central axis as the center; a field magnet, arranged inside the cup portion and fixed to the cup portion; an impeller portion, connected to the cup portion, having a plurality of blades arranged around the central axis outside the cup portion, and rotated along with the cup portion to take in air from the bottom side of the cup portion and discharge the air in a direction separating from the central axis; a housing, having a side wall portions which covers the periphery of the impeller portion and has a pair of ends in a circumferential direction, a base portion which covers the opening side of the cup portion and a cover portion in which an inlet opposed to the bottom of the cup portion is formed, the housing being where a width of a flow channel between the side wall portion and the impeller portion gradually expands toward an outlet as an opening between the pair of ends; a bearing mechanism, which rotatably supports the cup portion with the
  • the base-portion-side end of the impeller portion is circular or annular, and its central axis agrees with the central axis, a depression locally depressed in the direction separating from the impeller portion along the circumferential direction is formed in the base portion, and a space between the end and the base portion expands in the depression, and is substantially constant in other portions.
  • formation of the depression enables efficient supply of air to the armature so as to suppress an increase in temperature of the armature.
  • FIG. 1 is a sectional view showing a configuration of a centrifugal fan according to a first embodiment
  • FIG. 2 is an exploded oblique view of the centrifugal fan
  • FIG. 3 is a plan view showing a housing body and stator portion
  • FIG. 4 is a view showing another example of a rotor portion
  • FIG. 5 is a plan view showing another preferred example of the housing body
  • FIG. 6 is a plan view showing another preferred example of the housing body
  • FIG. 7 is a plan view showing a housing body of a centrifugal fan according to a second embodiment
  • FIG. 8 is an oblique view showing the housing body of the centrifugal fan according to the second embodiment
  • FIG. 9 is a sectional view showing a configuration of a centrifugal fan according to a third embodiment.
  • FIG. 10 is a sectional view showing the configuration of the centrifugal fan according to the third embodiment.
  • FIG. 11 is a view showing another example of the rotor portion
  • FIG. 12 is a view showing another example of the rotor portion.
  • FIG. 13 is an oblique view showing another preferred example of the housing body.
  • FIG. 1 is a view showing a configuration of a centrifugal fan 1 according to a first embodiment of the present invention.
  • FIG. 1 shows a vertical sectional view obtained by cutting with a plain including a central axis J 1 .
  • FIG. 2 is an oblique view showing an exploded main configuration of the centrifugal fan 1 .
  • the centrifugal fan 1 comprises: an impeller portion 2 which is rotated to generate the flow of air; and a motor 3 which is connected to the impeller portion 2 and rotates the impeller portion 2 around the central axis J 1 .
  • the impeller portion 2 and the motor 3 are housed in a housing 10 .
  • the housing 10 is assembled by fitting a cover portion 12 having an inlet 121 to the housing body 11 , and surrounds the impeller portion 2 to form a flow channel for the air (namely, the flow of the air that is generated by the rotation of the impeller portion 2 is adjusted for delivery).
  • the centrifugal fan 1 is used, for example, as an electric fan for cooling an electric appliance or an electronic device.
  • FIG. 3 is a plan view of the housing body 11 and a later-described stator portion 31 in FIGS. 1 and 2 .
  • the housing body 11 as part of the housing 10 comprises: a base portion 112 to which the stator portion 31 is fitted; and a side wall portion 113 covering the periphery of the impeller portion 2 , and has a configuration where the width of the flow channel between the side wall portion 113 and the impeller portion 2 gradually expands toward an outlet 13 (see FIG. 3 ).
  • the side wall portion 113 comprises: a delivery wall 1131 on the outlet 13 side; and a curved wall 1132 located on the upstream side of the delivery wall 1131 (namely a portion less close to the outlet 13 along the inside-surface of the housing body 11 ).
  • the delivery wall 1131 may be curved to some extent.
  • a (average) curvature radius of a substantially flat portion corresponding to the delivery wall 1131 is made larger than a (average) curvature radius of the curved wall 1132 , and the portion where significant expansion of the width of the flow channel begins by the large change in curvature radius can be specified as a boundary of the delivery wall and the curved wall (corresponding to the position shown by numeral 1133 in FIG. 3 ).
  • a step 1134 is provided for reducing the space between the impeller portion 2 and the base portion 112 in the vicinity of the outlet 13 so as to suppress return of the flow of the generated air to the uppermost stream of the flow channel.
  • the motor 3 is an outer rotor type motor, comprising a stator portion 31 as a fixed assembly and a rotor portion 32 as a rotational assembly.
  • the rotor portion 32 is rotatably supported by a later-described bearing mechanism with the central axis J 1 as the center with respect to the stator portion 31 .
  • the rotor portion 32 side is the upper side and the stator portion 31 side is the lower side along the central axis J 1 for the sake of convenience, but the central axis J 1 is not necessarily required to agree with the gravity direction.
  • the stator portion 31 is fixed to the base portion 112 as the lower surface of the housing body 11 , and holds each portion of the stator portion 31 .
  • a baring holding portion 311 in substantially cylindrical form with the central axis J 1 as the center, which protrudes from the base portion 112 to the upper side (namely, the rotor portion 32 side), is fitted to a cylindrical portion formed at the midsection of the base portion 112 .
  • ball bearings 312 , 313 each as of the bearing mechanism are provided on the upper portion and the lower portion in the direction of the central axis J 1 , and a preload spring 314 is provided on the lower side of the ball bearing 313 .
  • the stator portion 31 further comprises: an armature 315 fixed to the periphery of the baring holding portion 311 (namely, fixed to the base portion 112 on the periphery of the baring holding portion 311 ); and a circuit board 316 , which is electrically connected to the armature 315 between the armature 315 and the base portion 112 and on which an electronic component for current control for the armature 315 is mounted.
  • the rotor portion 32 comprises: a cup portion 321 in substantially bottomed cylindrical form with the central axis J 1 as the center, in which an opening 3211 is oriented downwardly (namely, the opening 3211 is opposed to the base portion 112 ); a substantially cylindrical field magnet 322 ′ fixed to the inside surface of the cup portion 321 ; and a shaft 323 protruding from the bottom of the cup portion 321 (namely, a substantially circular plate-like portion at the upper end of the cup portion 321 ) to the lower side.
  • the shaft 323 is pressed and fixed to the bottom of the cup portion 321 .
  • the shaft 323 is inserted into the baring holding portion 311 and rotatably supported by the ball bearings 312 , 313 .
  • a latch member 3231 for latching the spring 314 is fitted to the vicinity of the lower end of the shaft 323 , and since the spring 314 gives pre-load to the ball bearing 313 , the shaft 323 and the ball bearings 312 , 313 are held in appropriate positions.
  • the shaft 323 and the ball bearings 312 , 313 serve as a bearing mechanism, which rotatably supports the cup portion 321 with the central axis J 1 as the center with respect to the base portion 112 .
  • a driving current supplied to the armature 315 through the circuit board 316 is controlled to generate a torque (namely, rotational force) with the central axis J 1 as the center between the armature 315 and the field magnet 322 so that the shaft 323 and the impeller portion 2 fitted to the cup portion 321 rotate along with the cup portion 321 with the central axis J 1 as the center.
  • the impeller portion 2 comprises: a plurality of blades 22 which are connected to the cup portion 321 and annularly arranged outside the cup portion 321 (apart from the cup portion 321 ) with the central axis J 1 as the center; and an annular connection plate 23 which expands from the lower-side opening 3211 of the cup portion 321 toward the outside (namely in a direction separating from the central axis J 1 ), and connects the plurality of blades 22 on the lower side (namely, the base portion 112 side).
  • the inside of the cup portion 321 is composed of a substantially bottomed cylindrical yoke member 3212 including a cylindrical yoke portion 321 a with the central axis J 1 as the center.
  • the yoke member 3212 is formed of a metal having magnetism, and the field magnet 322 is fitted to the inside surface of the yoke portion 321 a , and is opposed to the armature 315 .
  • the outside of the cup portion 321 is composed of a substantially bottomed cylindrical outside cup portion 3213 made of a resin, and shaped integrally with the whole of the impeller portion 2 .
  • the structure of the cup portion 321 is not limited to the structure of FIG. 1 .
  • the yoke member 3212 may be cylindrically shaped, or as shown in FIG. 4 , the outside cup portion 3213 may be omitted and the impeller portion 2 may be connected directly to the opening of the yoke member 3212 .
  • Each of the plurality of blades 22 extends in substantially parallel with the central axis J 1 from the upper surface of the connection plate 23 (namely, the bottom-side main surface of the cup portion 321 ), and the upper ends of the plurality of blades 22 are connected by an annular portion 24 .
  • the base portion 112 covers the opening 3211 side of the cup portion 321 , and the inlet 121 opposed to the bottom of the cup portion 321 is formed in a cover portion 12 .
  • the base portion 112 includes an annular protrusion 1121 protruding toward the connection plate 23 of the impeller portion 2 .
  • a prescribed small space 14 is formed between the connection plate 23 and the base portion 112 by the annular protrusion 1121 .
  • the size of the space 14 is determined based upon the figuration accuracy and assembly accuracy of the impeller portion 2 and the base portion 112 so as to prevent the impeller portion 2 and the base portion 112 from coming into contact with each other.
  • the space between the connection plate 23 and the base portion 112 is large, stagnation of the air flow occurs to cause an increase in noise value in the centrifugal fan 1 .
  • the space between the connection plate 23 and the base portion 112 is made small in an attempt to suppress the noise value.
  • a depression 1122 is provided in the annular protrusion 1121 for partially expanding the space 14 (see FIG. 1 ) in the range from 30 to 180 degrees (preferably from 60 to 120 degrees, and further preferably from 80 to 100 degrees) with the central axis J 1 as the center between the curved wall 1132 of the side wall portion 113 and the central axis J 1 .
  • the depression 1122 is preferably provided from the position opposed to the boundary 1133 (see FIG. 3 ) of the delivery wall 1131 and the curved wall 1132 toward the upstream side.
  • the depression 1122 is preferably provided in the annular protrusion 1121 in a direction opposite to the rotational direction of the impeller portion 2 from the crossing position of a line connecting the boundary 1133 and the central axis J 1 and the annular protrusion 1121 in the range from 30 to 180 degrees with the central axis J 1 as the center.
  • the boundary of the annular protrusion 1121 and the depression 1122 is arranged to be an inclined surface where the annular protrusion 1121 gradually becomes lower towards the depression 1122 , and the air is smoothly led into the cup portion 321 .
  • a region of the bottom of the depression 1122 is provided with parallel oblique lines.
  • the depression 1122 reduces the degree of sealing of the space formed by the cup portion 321 and the base portion 112 , and by the rotation of the impeller portion 2 , the air is supplied to the stator portion 31 through the depression 1122 .
  • part of the annular protrusion 1121 is provided with the depression 1122 for expanding the space 14 and the air is thereby supplied to the space formed by the cup portion 321 and the base portion 112 so that the temperature rise of the armature 315 can be reduced.
  • the depression 1122 is opposed to the space between the armature 315 and the circuit board 316 to efficiently supply the air to both the armature 315 and the circuit board 316 , thereby enabling suppression of the temperature rise of the armature 315 and the electronic component mounted on the circuit board 316 .
  • This can result in faster rotation of the impeller portion 2 of the centrifugal fan 1 along with improvement in derating of the electronic component, thereby allowing improvement in air volume characteristic.
  • heat generation of the armature 315 suppressed, it is possible to suppress the temperature rise of the vicinity of the bearing mechanism so as to extend the life of the centrifugal fan 1 .
  • connection plate 23 continues to the opening 3211 of the cup portion 321 to cause blockages in the spaces between the plurality of blades 22 and the cup portion 321 , thereby preventing generation of the air flow from the inside of the blades 22 to the armature 315 .
  • the depression 1122 on the base portion 112 it is particularly preferable to provide the depression 1122 on the base portion 112 .
  • the space 14 can also be made small by making the impeller portion 2 high instead of providing the annular protrusion 1121 , a current value of the motor 3 becomes high when the plurality of blades 22 become unnecessarily long. Therefore, when the consumption power is desired to be suppressed while maintaining the air volume characteristic, it is preferable to provide the annular protrusion 1121 and then provide the depression 1122 on the annular protrusion 1121 .
  • the depression 1122 expands, the more the cooling efficiency of the armature 315 improves.
  • the depression 1122 is provided at the position and in the range harmonious for suppressing the noise value and the temperature rise of the armature 315 .
  • the position and the range where the depression 1122 is to be provided depend upon the figurations of the impeller portion 2 and the housing 10 , a required air volume, static pressure characteristic, and the like, and the design of the depression 1122 is changed as appropriate according to application of the centrifugal fan 1 .
  • FIGS. 5 and 6 are plan views each showing another preferred example of the housing body 11 .
  • the bottom region of the depression 1122 is provided with parallel oblique lines as in FIG. 3 .
  • the depression 1122 for expanding the space 14 is provided in the annular protrusion 1121 from the position on the annular protrusion 1121 which is almost opposed to the boundary 1133 of the delivery wall 1131 of the side wall portion 113 and the curved wall 1132 toward the upstream side, and the range for the provision is 180 degrees with the central axis J 1 as the center. Thereby, the air is supplied to the stator portion 31 (see FIG. 3 ) from the broader range.
  • the depression 1122 is provided in the annular protrusion 1121 from the upstream side of the position on the annular protrusion 1121 which is opposed to the boundary 1133 of the delivery wall 1131 of the side wall portion 113 and the curved wall 1132 toward the further upstream side, and the range for the provision is 90 degrees with the central axis J 1 as the center. Since pressure is typically high on the upstream side, in the case of the example shown in FIG. 6 , it is possible by provision of the depression 1122 on the upstream side to efficiently lead the air to the armature 315 .
  • the position of the depression 1122 is expressed as the position opposite to the outlet 13 , and with the depression 1122 provided in such a manner, the air is efficiently supplied to the armature 315 .
  • the air supplied from the depression 1122 is then flown out from the space 14 on the downstream side toward the outlet 13 .
  • the centrifugal fan according to the second embodiment includes a housing body 11 a shown in the plan view of FIG. 7 in place of the housing body 11 shown in FIGS. 1 to 3 , and other configurations are the same as those of the centrifugal fan 1 of FIG. 1 .
  • FIG. 8 is an oblique view of the housing body 11 a , and in FIGS. 7 and 8 , the same constituents as those of the centrifugal fan 1 are provided with the same numerals as those of the centrifugal fan 1 .
  • the base portion 112 of the housing body 11 a is provided with: a depression 1122 a for expanding the space 14 (see FIG. 1 ) between the connection plate 23 and the base portion 112 on the upstream side of the position on the annular protrusion 1121 which is opposed to the boundary 1133 of the delivery wall 1131 and the curved wall 1132 ; and another depression 1122 b for expanding the space 14 between the connection plate 23 and the base portion 112 at the position closer to the outlet 13 than the depression 1122 a .
  • the regions of the depressions 1122 a , 1122 b are shown by parallel oblique lines, as in FIG. 3 .
  • the depression 1122 b is provided so as to include the position on the annular protrusion 1121 which is opposed to the boundary 1133 of the delivery wall 1131 and the curved wall 1132 .
  • the air is taken in from the depression 1122 a on the upstream side where the pressure of the air becomes larger, and the supplied air is discharged from the depression 1122 b to the stator portion 31 (see FIG. 3 ). It is thereby possible to efficiently take in the air to the armature 315 .
  • the depression 1122 b may be provided on the downstream of the position opposed to the boundary 1133 .
  • FIG. 9 is a vertical sectional view of a centrifugal fan 1 a according to a third embodiment of the present invention.
  • the centrifugal fan 1 a is significantly different from the centrifugal fan 1 in that a plurality of blades 22 a radiate from the outside surface of the cup portion 321 .
  • the centrifugal fan 1 of FIG. 1 is a so-called sirocco fan
  • the centrifugal fan 1 a of FIG. 9 is a so-called turbo fan.
  • the annular protrusion 1121 of the base portion 112 is provided so as to protrude toward (the edge of) the opening 3211 of the cup portion 321 , and the annular protrusion 1121 is provided with the depression 1122 for partially expanding the space between the opening 3211 of the cup portion 321 and the base portion 112 .
  • Other structures are the same as those of the centrifugal fan 1 of FIG. 1 , and the same numerals are provided.
  • the air is supplied to the armature 315 inside the cup portion 321 through the depression 1122 , thereby to allow suppression of the temperature rise of the armature 315 .
  • FIG. 10 is a vertical sectional view of a centrifugal fan 1 b according to a fourth embodiment of the present invention.
  • the depressions 1122 , 1122 a , 1122 b for partially expanding the space 14 are formed at the position opposed to the connection plate 23 .
  • the centrifugal fan 1 b shown in FIG. 10 the depressions and the space 14 are provided as opposed to the (edge of) the opening 3211 of the cup portion 321 as in the case of the turbo-fan type centrifugal fan shown in FIG. 9 .
  • Other respects are the same as those of the first embodiment.
  • the range of the depression 1122 may be changed as in FIGS. 5 and 6 , and a plurality of depressions may be provided as shown in FIG. 7 .
  • connection plate 23 on the side surface of the cup portion 321 as in the case of the rotor portion 2 shown in FIGS. 11 and 12
  • the structure where the depression 1122 is provided between the opening 3211 and the base portion 112 as in FIG. 10 can be utilized.
  • the annular protrusion 1121 for making the space between the connection plate 23 and the base portion 112 small is formed on the base portion 112 , and the part of the annular protrusion 1121 is provided with the depression 1122 .
  • a depression 1122 c may be formed in the base portion 112 which has been brought into a flat state, and air for cooling may be supplied from the depression 1122 c into the cup portion 321 .
  • the depression 1122 c with a depth not larger than the thickness of the base portion 112 may be provided at the position of the depression 1122 c , and the rear surface of the base portion 112 may be made flat, or the base portion 112 may be protruded downward in the depression 1122 c.
  • the range where the space 14 is expanded by the depression provided in the base portion 112 is not required to be limited to the foregoing angles and numbers, and for example, not less than three depressions may be provided in the annular protrusion 1121 .
  • the armature 315 may be partially located inside the cup portion 321 .
  • a sleeve bearing may be used other than the ball bearing in the bearing mechanism.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Motor Or Generator Cooling System (AREA)
US11/555,361 2005-11-01 2006-11-01 Centrifugal fan Abandoned US20070128052A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005-317998 2005-11-01
JP2005317998A JP4935051B2 (ja) 2005-11-01 2005-11-01 遠心ファン

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CN (1) CN100465460C (zh)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080019827A1 (en) * 2006-07-21 2008-01-24 Matsushita Electric Industrial Co., Ltd. Centrifugal fan device and eletronic device having the same
US20090053053A1 (en) * 2007-08-24 2009-02-26 Hsin-Chen Lin Blower
US20120148393A1 (en) * 2010-12-14 2012-06-14 Delta Electronics, Inc. Centrifugal fan
US20120201670A1 (en) * 2011-02-04 2012-08-09 Nidec Corporation Blower fan
US20130121818A1 (en) * 2010-05-26 2013-05-16 Valeo Japan Co., Ltd. Air Blowing Unit For Vehicle
US20130323093A1 (en) * 2012-05-30 2013-12-05 Nidec Corporation Motor and fan
US20180266434A1 (en) * 2010-09-03 2018-09-20 Delta Electronics, Inc. Fan and manufacturing method thereof
US20190101124A1 (en) * 2017-09-29 2019-04-04 Nidec Corporation Centrifugal fan
US20190195230A1 (en) * 2017-12-22 2019-06-27 Nidec Corporation Centrifugal fan
US11286945B2 (en) * 2015-11-23 2022-03-29 Denso Corporation Turbofan and method of manufacturing turbofan
US20230220866A1 (en) * 2022-01-13 2023-07-13 Asia Vital Components (China) Co., Ltd. Motor case assembly
CN118572916A (zh) * 2024-07-31 2024-08-30 常州阳光布罗尔通风电器有限公司 一种离心风机的永磁直驱电机

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010216280A (ja) * 2009-03-13 2010-09-30 Nippon Densan Corp 遠心ファン
KR101039635B1 (ko) * 2010-03-11 2011-06-08 주식회사 제이엠더블유 헤어 드라이어용 비엘디씨 모터
JP6229141B2 (ja) * 2013-03-13 2017-11-15 パナソニックＩｐマネジメント株式会社 送風装置
JP6142285B2 (ja) * 2013-03-21 2017-06-07 パナソニックＩｐマネジメント株式会社 片吸込み型遠心送風機
JP6299503B2 (ja) * 2014-07-18 2018-03-28 株式会社デンソー 回転電機
WO2016170580A1 (ja) * 2015-04-20 2016-10-27 三菱電機株式会社 遠心送風機
CN205533425U (zh) * 2016-01-05 2016-08-31 南安市腾龙专利应用服务有限公司 一种结构改进的风扇
US10563660B2 (en) * 2016-07-22 2020-02-18 Keihin Corporation Blower motor unit for air conditioner

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6034451A (en) * 1997-07-31 2000-03-07 Valeo Climatisation Centrifugal fan with improved air cooling for its motor, especially for a motor vehicle
US7207774B2 (en) * 2004-03-17 2007-04-24 Japan Servo Co., Ltd. Centrifugal fan and casing thereof
US7329095B2 (en) * 2004-10-08 2008-02-12 Asia Vital Component Co., Ltd. Blower capable of reducing secondary flow

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3115839A (en) * 1960-12-09 1963-12-31 Ingersoll Rand Co Electric motor driven pump
JPH08312594A (ja) * 1995-05-19 1996-11-26 Akaishi Kinzoku Kogyo Kk モータ内蔵型送風機およびそれをケーシング内に収納した送風装置
JP3038538U (ja) * 1996-12-06 1997-06-20 明烈 李 超薄型直流無ブラシ式ファン
US6135731A (en) * 1997-06-26 2000-10-24 Turbodyne Systems, Inc. Compact and self-cooling blower assembly
CN1301371C (zh) * 1999-10-18 2007-02-21 建准电机工业股份有限公司 具有点支承结构的超薄小型散热器
JP2002242896A (ja) * 2001-02-19 2002-08-28 Japan Servo Co Ltd 軸流ファン
CN2528992Y (zh) * 2001-12-25 2003-01-01 元山科技工业股份有限公司 一种低噪音电风扇
JP2005036676A (ja) * 2003-07-16 2005-02-10 Toshiba Home Technology Corp ファンモータ
JP2005264789A (ja) * 2004-03-17 2005-09-29 Japan Servo Co Ltd 遠心ファン
JP2006207519A (ja) * 2005-01-31 2006-08-10 Japan Servo Co Ltd 遠心ファン

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6034451A (en) * 1997-07-31 2000-03-07 Valeo Climatisation Centrifugal fan with improved air cooling for its motor, especially for a motor vehicle
US7207774B2 (en) * 2004-03-17 2007-04-24 Japan Servo Co., Ltd. Centrifugal fan and casing thereof
US7329095B2 (en) * 2004-10-08 2008-02-12 Asia Vital Component Co., Ltd. Blower capable of reducing secondary flow

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080019827A1 (en) * 2006-07-21 2008-01-24 Matsushita Electric Industrial Co., Ltd. Centrifugal fan device and eletronic device having the same
US8313284B2 (en) * 2006-07-21 2012-11-20 Panasonic Corporation Centrifugal fan device and eletronic device having the same
US20090053053A1 (en) * 2007-08-24 2009-02-26 Hsin-Chen Lin Blower
US8491261B2 (en) * 2007-08-24 2013-07-23 Delta Electronics, Inc. Blower
US20130121818A1 (en) * 2010-05-26 2013-05-16 Valeo Japan Co., Ltd. Air Blowing Unit For Vehicle
US11022136B2 (en) * 2010-09-03 2021-06-01 Delta Electronics, Inc. Fan and manufacturing method thereof
US20180266434A1 (en) * 2010-09-03 2018-09-20 Delta Electronics, Inc. Fan and manufacturing method thereof
US20120148393A1 (en) * 2010-12-14 2012-06-14 Delta Electronics, Inc. Centrifugal fan
US8967962B2 (en) * 2010-12-14 2015-03-03 Delta Electronics, Inc. Centrifugal fan
US9964119B2 (en) 2010-12-14 2018-05-08 Delta Electronics, Inc. Centrifugal fan
US20120201670A1 (en) * 2011-02-04 2012-08-09 Nidec Corporation Blower fan
US9316229B2 (en) * 2012-05-30 2016-04-19 Nidec Corporation Motor and fan
US20130323093A1 (en) * 2012-05-30 2013-12-05 Nidec Corporation Motor and fan
US11286945B2 (en) * 2015-11-23 2022-03-29 Denso Corporation Turbofan and method of manufacturing turbofan
US20190101124A1 (en) * 2017-09-29 2019-04-04 Nidec Corporation Centrifugal fan
US11009032B2 (en) * 2017-09-29 2021-05-18 Nidec Corporation Centrifugal fan
US20190195230A1 (en) * 2017-12-22 2019-06-27 Nidec Corporation Centrifugal fan
US20230220866A1 (en) * 2022-01-13 2023-07-13 Asia Vital Components (China) Co., Ltd. Motor case assembly
US12110918B2 (en) * 2022-01-13 2024-10-08 Asia Vital Components (China) Co., Ltd. Motor case assembly
CN118572916A (zh) * 2024-07-31 2024-08-30 常州阳光布罗尔通风电器有限公司 一种离心风机的永磁直驱电机

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