US20070098571A1 - Centrifugal fan - Google Patents

Centrifugal fan Download PDF

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Publication number
US20070098571A1
US20070098571A1 US11/588,397 US58839706A US2007098571A1 US 20070098571 A1 US20070098571 A1 US 20070098571A1 US 58839706 A US58839706 A US 58839706A US 2007098571 A1 US2007098571 A1 US 2007098571A1
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United States
Prior art keywords
cup part
impeller
center axis
blades
centrifugal fan
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/588,397
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English (en)
Inventor
Hideki Nagamatsu
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: NAGAMATSU, HIDEKI
Publication of US20070098571A1 publication Critical patent/US20070098571A1/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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—Vanes

Definitions

  • the present invention relates to a electrically operated centrifugal fan used in air blasting.
  • an impeller with a plurality of blades arranged in the circumferential direction with the rotating axis as the center is arranged in the centrifugal fan for taking air in the axis direction and exhausting air in the radial direction, and various modifications are made on the impeller to achieve a quieter sound, to improve air volume property, and to suppress lowering in performance involved in the temperature rise of the motor.
  • a multi-blade fan in which an inducer section is coupled to the inner side of the blade is disclosed.
  • an impeller is disclosed in which the fan efficiency is enhanced compared to the sirocco fan of general shape of the same size by having the shape of the blade as a combination of a turbo fan and a sirocco fan.
  • the impeller configuration includes an air current guiding means of a plate shape perpendicular to the rotating shaft on the inner side of the blade, and which air current guiding means is arranged on the movement path of the air current to change the pattern of the air current thereby reducing the noise, and a technique is disclosed of forming an opening communicating to the air hole between the blades at the lower part of the impeller thereby reducing the noise or the current value of when the impeller rotates.
  • the production of the turbulent flow caused by the air flowing near the outer surface of the cup part is efficiently suppressed, and the noise of the centrifugal fan is reduced by arranging the auxiliary blades. Air is also supplied to the stator by the auxiliary blades, and thus the temperature rise of the stator is also suppressed.
  • the present invention relates to a centrifugal fan comprising: a cup part of substantially bottomed cylindrical shape with a cylindrical yoke portion having a predetermined center axis as center; a field magnet fixed on an inner surface of the cup part; an impeller, including a blade assembly connected to the cup part and arranged radially in an annular region on the outer side of the cup part, taking in air from the bottom side of the cup part and exhausting air in a direction away from the center axis when rotating with the cup part, the blade assembly including: a plurality of main blades arranged along the periphery of the impeller; and a plurality of auxiliary blades connected to the outer surface of the cup part and directly or indirectly connected with the plurality of main blades at an opening side of the cup part between the outer surface of the cup part and the plurality of main blades; a housing including a side wall part for covering the periphery of the impeller, a base part for covering the opening side of the cup part, and a cover part formed with
  • FIG. 1 is a cross sectional view showing a configuration of a centrifugal fan of one embodiment of the present invention
  • FIG. 2 is a plan view showing the centrifugal fan
  • FIG. 3 is a perspective view showing an impeller
  • FIG. 4 is a plan view showing another example of the impeller
  • FIG. 5 is a plan view showing another example of the impeller
  • FIG. 6 is a cross sectional view showing another example of the impeller
  • FIG. 7 is a cross sectional view showing another example of the impeller.
  • FIG. 8 is a plan view showing another example of the impeller.
  • FIG. 9 is a plan view showing another example of the impeller.
  • FIG. 10 is a cross sectional view showing another example of an auxiliary blade
  • FIG. 11 is a cross sectional view showing another example of an auxiliary blade
  • FIG. 12 is a cross sectional view showing another example of an auxiliary blade
  • FIG. 13 is a cross sectional view showing another example of an auxiliary blade
  • FIG. 14 is a cross sectional view showing another example of an auxiliary blade
  • FIG. 15 is a cross sectional view showing another example of an auxiliary blade
  • FIG. 16 is a cross sectional view showing another example of an auxiliary blade.
  • FIG. 17 is a cross sectional view showing another example of an auxiliary blade.
  • FIG. 1 is a view showing a configuration of a centrifugal fan 1 according to one embodiment of the present invention, and shows a longitudinal cross section cut along a plane including a center axis J 1 .
  • FIG. 2 is a plan view showing the centrifugal fan 1 .
  • the illustration of the end portions of a housing 10 on both left and right sides are omitted in FIG. 1 , and a state in which a cover part (denoted with reference character 111 in FIG. 1 ) of the upper surface of the housing 10 is removed is shown in FIG. 2 .
  • the centrifugal fan 1 includes an impeller 2 for generating the flow of air by rotating, and a motor 3 , connected to the impeller 2 , for rotating the impeller 2 about a predetermined center axis J 1 , where the impeller 2 and the motor 3 are housed in the housing 10 .
  • the centrifugal fan 1 is used as a power operated fan for air cooling the electrical products and electronic equipments.
  • the housing 10 includes a cover part 111 formed with an air intake port 12 , and a base part 112 attached with a stator section 31 to be hereinafter described, and further includes a side wall part 113 that covers the outer periphery of the impeller 2 , as shown in FIG. 2 .
  • the housing 10 is assembled by attaching the cover part 111 to a housing main body 11 including the base part 112 and the side wall part 113 shown in FIG. 2 , and a flow path of the air is formed (i.e., flow of air generated by rotation of impeller 2 is adjusted and fed by housing 10 ) as the housing 10 surrounds the impeller 2 .
  • the width of the flow path between the side wall part 113 and the impeller 2 has a shape that gradually widens towards an air exhaust port 13 (see FIG. 2 ), and the space between the base part 112 and the side wall part 113 in the housing 10 is blocked.
  • the motor 3 is an outer rotor type motor, as shown in FIG. 1 , and includes a stator section 31 which is a fixed assembly, and a rotor section 32 which is a rotating assembly, where the rotor section 32 is rotatably supported with respect to the stator section 31 with the center axis J 1 as the center by a bearing mechanism to be hereinafter described.
  • the following description is made with the rotor section 32 side as the upper side and the stator section 31 side as the lower side along the center axis J 1 for the sake of convenience, but the center axis J 1 does not necessarily need to coincide with the direction of gravitational force.
  • the stator section 31 is fixed to a base part 112 which is the lower surface of the housing 10 , and a bearing holding part 311 of a substantially cylindrical shape having the center axis J 1 as the center and projecting upward (i.e., rotor section 32 side) from the base part 112 is attached at a cylindrical region formed at the center part of the base part 112 .
  • a bearing holding part 311 On the inner side of the bearing holding section 311 , ball bearings 312 , 313 serving as bearing mechanism are arranged on the upper and lower sections in the center axis J 1 direction and a pre-load spring 314 is arranged on the lower side of the ball bearing 313 .
  • the stator section 31 further includes a stator 315 fixed on the periphery of the bearing holding part 311 (i.e., fixed to the base part 112 at the periphery of the bearing holding part 311 ), and a circuit substrate 316 electrically connected to the stator 315 between the stator 315 and the base part 112 and mounted with electronic components for current control to the stator 315 .
  • the rotor section 32 includes a cup part 321 of a substantially bottomed cylindrical shape having the center axis J 1 as the center and having an opening 3211 facing downward (i.e., opening 3211 facing the base part 112 ), a substantially cylindrical field magnet 322 fixed to the inner surface of the cup part 321 and facing the stator 315 , and a shaft 323 projecting downward from the bottom of the cup part 321 (i.e., region of substantially circular disc shape at the upper end of the cup part 321 ).
  • the shaft 323 is attached to the cup part 321 by being press fit and fixed to the bush 324 fixed at the bottom of the cup part 321 , and inserted to the bearing holding part 311 and rotatably supported by the ball bearings 312 , 313 .
  • An engagement member 3231 for engaging the spring 314 is attached to the vicinity of the lower end of the shaft 323 , where the shaft 323 and the ball bearings 312 , 313 are held at the appropriate positions when preload is applied to the ball bearing 313 by the spring 314 .
  • the ball bearings 312 , 313 serve as the bearing mechanism for rotatably supporting the cup part 321 with respect to the base part 112 with the center axis J 1 as the center.
  • a torque i.e. rotational force
  • the shaft 323 as well as the impeller 2 including the blade assembly 22 connected to the cup part 321 rotate with the cup part 321 with the center axis J 1 as the center.
  • the shaft 323 may be directly attached to the cup part 321 without the bush 324 in between.
  • the opening 3211 side of the cup part 321 is covered by the base part 112 , and the inner side of the cup part 321 is arranged with a yoke member 3212 of a substantially bottomed cylindrical shape including a cylindrical yoke portion 321 a having the center axis J 1 as the center.
  • the yoke member 3212 is made of metal having magnetism, the field magnet 322 is attached to the inner surface of the yoke part 321 a , and the bush 324 is attached to the center of the bottom thereof.
  • the outer side of the cup part 321 is arranged with an outer side cup part 3213 of substantially bottomed cylindrical shape made of resin, which is integrally molded with the entire impeller 2 , and is press fit and fixed with the yoke member 3212 .
  • the configuration of the cup part 321 is not limited to the configuration of FIG. 1 , and for example, the yoke member 3212 may be a cylindrical shape, the outer side cup part 3213 may be connected to the shaft 323 or the bush 324 , or the outer side cup part 3213 may be omitted and the impeller 2 may be directly connected to the opening of the yoke member 3212 .
  • FIG. 3 is a perspective view showing the impeller 2 and the outer side cup part 3213 integrally molded with the impeller 2 .
  • the impeller 2 includes the blade assembly 22 arranged radially in the annular region (having center axis J 1 as center) on the outer side of the cup part 321 , as shown in FIGS. 1 to 3 .
  • the air is taken in from the air intake port 12 facing the upper side (i.e., bottom side of the cup part 321 ) of the impeller 2 and the air is exhausted in a direction away from the center axis J 1 , when the impeller 2 rotates with the cup part 321 , whereby the air is introduced to the air exhaust port 13 along the side wall part 113 as described above.
  • the blade assembly 22 includes a plurality of main blades 221 arranged along the periphery of the impeller 2 at a distance from the outer surface 321 b of the cup part 321 (outer cup part 3213 ), and a plurality of auxiliary blades 222 arranged between the cup part 321 and the plurality of main blades 221 along the outer surface 321 b of the cup part 321 .
  • the distal end of the main blade 221 is hidden except for one section, but each of the plurality of main blades 221 are formed as forward blades inclined in the rotating direction 51 of the impeller 2 while being directed to the outer side.
  • the plurality of main blades 221 have the lower ends on the base part 112 side perpendicular to the center axis J 1 and coupled by an annular plate 23 having the center axis J 1 as the center, and the upper ends coupled by an annular coupling part 24 , which are integrally molded.
  • an annular coupling part 24 which are integrally molded.
  • one section of the coupling part 24 is omitted to show the shape of the main blade 221 (same as in FIGS. 4 to 7 ).
  • Each of the plurality of auxiliary blades 222 is a backward blade inclined to the side opposite the rotating direction 51 of the impeller 2 while being directed to the outer side as shown in FIG. 2 , and is connected to the outer surface 321 b of the outer side cup part 3213 of the cup part 321 , and also has the outermost region of the auxiliary blades 222 connected to the region on the inner side of the annular plate 23 .
  • the auxiliary blade 222 is directly connected to one main blade 221 for every two main blades 221 on the base part 112 side, and each of the plurality of auxiliary blades 222 is continued to one of the plurality of main blades 221 , as shown in FIGS. 1 and 2 .
  • the region between the main blade 221 and the auxiliary blade 222 functions as a rib, and the auxiliary blades 222 itself also function as the rib, whereby the rigidity of the impeller 2 is enhanced.
  • the molding (resin injection, take out from die etc.) of the impeller 2 is facilitated by connecting the main blade 221 and the auxiliary blade 222 using the annular plate 23 on the base part 112 side.
  • the main blade 221 and the auxiliary blade 222 may obviously be separated, and the plurality of auxiliary blades 222 may be indirectly connected to the plurality of main blades 221 by way of the annular plate 23 .
  • the auxiliary blade 222 may be connected to the outer surface of the yoke member 3212 (see FIG. 1 ) through insert molding and the like.
  • the main blade 221 and the auxiliary blade 222 are preferably continued in terms of smoothly flowing the air in from the auxiliary blade 222 to the main blade 221 .
  • the flow-in efficiency of the air to the main blade 221 enhances if an obstacle is not arranged between the cup part 321 and the main blade 221 .
  • the main blade 221 and the auxiliary blade 222 are designed so as to be continued in the centrifugal fan 1 and the width in the center axis J 1 direction of the impeller 2 between the main blade 221 and the auxiliary blade 222 (i.e., boundary) is made small, and thus the turbulent flow suppressing effect by the auxiliary blade 222 is obtained, and the influence of the auxiliary blade 222 on the property (e.g., static pressure-air volume property) of the centrifugal fan 1 caused by the air flow generated at the main blade 221 is reduced.
  • a specific preferable designing condition includes having the width (denoted with reference character W in FIG.
  • the edge 2222 on the side away from the base part 112 of the auxiliary blade 222 is inclined towards the base part 112 while extending towards the outer side from the outer surface 321 b of the cup part 321 , and the width of the auxiliary blade 222 with respect to the center axis J 1 direction is gradually increased from the peripheral side of the impeller 2 towards the cup part 321 in the centrifugal fan 1 , as shown in FIG. 1 .
  • the production of turbulent flow is efficiently suppressed without lowering the fan property.
  • the width in the center axis J 1 direction of the impeller 2 between the main blade 221 and the auxiliary blade 222 is a minimum width in the up and down direction between one main blade 221 and one auxiliary blade 222 when the main blade 221 and the auxiliary blade 222 are directly connected (i.e., width in the up and down direction of a rib shaped region the annular region when focusing only on a substantially concave region of annular shape having the center axis J 1 as the center between the plurality of main blades 221 and the plurality of auxiliary blades 222 ), and is the thickness of the annular plate 23 when the main blade 221 and the auxiliary blade 222 are indirectly connected by way of the annular plate 23 .
  • a plurality of openings 25 passing through with respect to the center axis J 1 direction between the plurality of auxiliary blades 222 are further arranged in the impeller 2 , as shown in FIGS. 1 to 3 .
  • the opening ends of the base part 112 side of the plurality of openings 25 include an edge 2221 on the base part 112 side of the plurality of auxiliary blades 222 , and the region 251 (i.e., region on the inner side of the annular plate 23 ) on the plurality of main blades 221 side of the opening end is brought closer to the base part 112 than the region 252 (i.e., region on the opening 3211 side of the cup part 321 ) on the center axis J 1 side.
  • the opening end inclines towards a gap between the stator 315 and the circuit substrate 316 .
  • the edge 2221 on the base part 112 side of the auxiliary blade 222 is inclined towards the base part 112 while extending towards the outer side from the opening 3211 of the cup part 321 .
  • the configuration of the centrifugal fan 1 has been described, where a plurality of auxiliary blades connected to the outer surface 321 b and directly connected to the main blade 221 on the base part 112 side (may be indirectly connected by way of the annular plate 23 ) are arranged between the outer surface 321 b of the cup part 321 and the main blade 221 in the centrifugal fan 1 , whereby the air flowing near the outer surface 321 b of the cup part 321 is taken in by the auxiliary blade 222 and thus the air is smoothly introduced into the main blade 221 without stagnating.
  • the production of the turbulent flow at the vicinity of the outer surface 321 b of the cup part 321 is suppressed, the air is smoothly flowed to the main blade 221 , and noise of the centrifugal fan 1 is reduced.
  • the supply efficiency of the air flowing towards the stator 315 can be enhanced, and cooling of the circuit substrate 316 can be performed by inclining the opening ends on the base part 112 side of the plurality of openings 25 toward the stator 315 or the circuit substrate 316 (in particular, toward the gap between the stator 315 and the circuit substrate 316 ).
  • FIGS. 4 to 9 are views showing other examples of the impeller.
  • Each auxiliary blade 222 is a backward blade in the impeller 2 shown in FIG. 2 , but the shape of the auxiliary blade is not limited to the backward blade, and each auxiliary blade 222 a may be a forward blade as in the impeller 2 a shown in FIG. 4 , or each auxiliary blade 222 b may be a radial blade extending linearly in the radial direction from the cup part 321 as in the impeller 2 b shown in FIG. 5 .
  • the main blade 221 of the impeller 2 a and the impeller 2 b is a forward blade, similar to in the impeller 2 .
  • the main blade is not limited to the forward blade as in the impeller 2 of FIG. 2 , and for example, may be the main blade 221 a , which is the radial blade, as in the impeller 2 c shown in FIG. 6 or the main blade 221 b , which is the backward blade, as in the impeller 2 d shown in FIG. 7 .
  • one main blade 221 and one auxiliary blade 222 may be connected for every three or more main blades 221 , or the auxiliary blade 222 may be continuously formed to all the main blades 221 as in the impeller 2 e shown in FIG. 8 .
  • the shape of the auxiliary blade is not limited to a flat plate shape, and each auxiliary blade 222 c may be curved while extending to the peripheral side of the impeller 2 f from the cup part 321 when looking at the impeller 2 f from the upper side, as shown in FIG. 9 .
  • the connecting range of the auxiliary blade 222 and the cup part 321 is not only the range from the middle to the lower end of the outer surface 321 b of the cup part 321 with respect to the center axis J 1 direction, as shown in FIG. 1 , and may be the range from the upper end to the lower end of the cup part 321 as shown in FIG. 10 , the range from the middle to the middle of the outer surface 321 b with respect to the center axis J 1 direction, as shown in FIG. 11 , or may be the range from the upper end to lower than the lower end of the cup part 321 , as shown in FIG. 12 .
  • edges 2221 , 2222 of the lower side and the upper side of the auxiliary blade 222 may be curved, as shown in FIG. 13 , or the edge 2222 of the upper side and the edge 2223 parallel to the center axis J 1 may be continued, as shown in FIGS. 14 and 15 .
  • the shape, number, and size of the blade may be changed in variety of ways, and the shape etc. of the main blade 221 and the auxiliary blade 222 are determined based on the equipment on which the centrifugal fan 1 is mounted, the air volume property that is required etc.
  • the production of turbulent flow at the vicinity of the outer surface 321 b of the cup part 321 is suppressed and the noise is reduced for any type of main blade 221 and auxiliary blade 222 .
  • the shape of the edge 2222 on the upper side of the auxiliary blade 222 may be a shape in which a step is formed in the middle, as shown in FIG. 16 .
  • the edges 2221 of the plurality of auxiliary blades 222 d may be extended horizontally from the opening 3211 of the cup part 321 to the outer side so that the shape of the plurality of auxiliary blades 222 d is substantially triangular, and the outermost region of the plurality of auxiliary blades 222 d may be connected only to the region on the inner side of the annular plate 23 , as shown in FIG. 17 .
  • the production of the turbulent flow at the outer surface 321 b of the cup part 321 is suppressed and the noise is reduced, and moreover, the temperature rise of the stator 315 is suppressed since the opening 25 is arranged between two adjacent auxiliary blades 222 d and the air is supplied to the inside of the cup part 321 by the action of the auxiliary blade 222 d and the opening 25 .
  • the entire stator 315 is substantially accommodated in the cup part 321 in the above embodiment, but only one part of the stator 315 may be positioned in the cup part 321 when the stator 315 is arranged in the concave part formed around the center axis J 1 of the base part 112 . Furthermore, a sleeve bearing and the like may be used for the bearing mechanism other than the ball bearing.
  • the annular plate 23 does not need to be a plate perpendicular to the center axis J 1 , and the cross section at the plane including the center axis J 1 may be inclined from the direction perpendicular to the center axis J 1 as in the inclined surface of a frustum of circular cone. Moreover, air is supplied from the opening 25 to the stator 315 in the embodiment, but the opening 25 does not need to be arranged if the opening 25 does not need to be arranged due to reasons that the temperature rise of the stator 315 is within the tolerable range.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US11/588,397 2005-10-27 2006-10-27 Centrifugal fan Abandoned US20070098571A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005-312448 2005-10-27
JP2005312448A JP4935048B2 (ja) 2005-10-27 2005-10-27 遠心ファン

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US20070098571A1 true US20070098571A1 (en) 2007-05-03

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US11/588,397 Abandoned US20070098571A1 (en) 2005-10-27 2006-10-27 Centrifugal fan

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Cited By (21)

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US20080112810A1 (en) * 2005-07-15 2008-05-15 Nidec Corporation Fan
US20090052820A1 (en) * 2007-08-24 2009-02-26 Hui-Chun Chang Fan, motor and bushing thereof
US20090311093A1 (en) * 2008-06-14 2009-12-17 Nidec Corporation Impeller and centrifugal fan
US20100232967A1 (en) * 2009-03-13 2010-09-16 Nidec Corporation Centrifugal fan
US20120171024A1 (en) * 2011-01-02 2012-07-05 Asia Vital Components Co., Ltd. Bearing holding structure and fan module using same
WO2014014609A1 (en) * 2012-07-20 2014-01-23 Regal Beloit America, Inc. Blower motor assembly having air directing surface
US20140169966A1 (en) * 2012-12-13 2014-06-19 Foxconn Technology Co., Ltd. Magnet case and rotor incorporating the same
US20140203450A1 (en) * 2013-01-23 2014-07-24 Amtek Semiconductors Co., Ltd. Semiconductor package and method of fabricating the same
US8998588B2 (en) 2011-08-18 2015-04-07 General Electric Company Segmented fan assembly
US20150118037A1 (en) * 2013-10-28 2015-04-30 Minebea Co., Ltd. Centrifugal fan
US20150377238A1 (en) * 2014-06-27 2015-12-31 Minebea Co., Ltd. Centrifugal fan
EP2549117A4 (en) * 2010-03-15 2017-10-04 Sharp Kabushiki Kaisha Fan, metallic mold, and fluid delivery device
US10221855B2 (en) 2012-07-20 2019-03-05 Regal Beloit America, Inc. Furnace air handler blower assembly utilizing a motor connected to an impeller fan that is suspended with mounting arms
US20190101124A1 (en) * 2017-09-29 2019-04-04 Nidec Corporation Centrifugal fan
CN111727324A (zh) * 2018-02-28 2020-09-29 三电汽车空调系统株式会社 送风机
CN112369810A (zh) * 2020-11-10 2021-02-19 湖南瑞奇电器有限公司 一种用于电取暖桌的吹风发热装置
US11454249B2 (en) * 2020-01-14 2022-09-27 Acer Incorporated Heat dissipation fan
WO2023274991A1 (en) * 2021-07-02 2023-01-05 Koninklijke Philips N.V. Impeller for used in a fan and a fan
US20230279868A1 (en) * 2022-03-04 2023-09-07 Delta Electronics, Inc. Impeller
EP4336048A1 (en) * 2022-09-09 2024-03-13 Koninklijke Philips N.V. Blade mechanism for a fan and fan with such blade mechanism
WO2024052245A1 (en) * 2022-09-09 2024-03-14 Koninklijke Philips N.V. Blade mechanism for a fan and fan with such blade mechanism

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KR101039635B1 (ko) * 2010-03-11 2011-06-08 주식회사 제이엠더블유 헤어 드라이어용 비엘디씨 모터
JP2012215099A (ja) 2011-03-31 2012-11-08 Minebea Motor Manufacturing Corp インペラ及び遠心ファン
JP2015007419A (ja) * 2013-05-29 2015-01-15 カルソニックカンセイ株式会社 ブロワ
JP7035617B2 (ja) * 2018-02-26 2022-03-15 日本電産株式会社 遠心ファン
CN113250978B (zh) * 2020-02-11 2024-05-07 宏碁股份有限公司 散热风扇

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