US20080260526A1 - Counter-rotating axial-flow fan - Google Patents

Counter-rotating axial-flow fan Download PDF

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Publication number
US20080260526A1
US20080260526A1 US12/104,861 US10486108A US2008260526A1 US 20080260526 A1 US20080260526 A1 US 20080260526A1 US 10486108 A US10486108 A US 10486108A US 2008260526 A1 US2008260526 A1 US 2008260526A1
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United States
Prior art keywords
engaged
corner
members
cylindrical air
channel
Prior art date
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Abandoned
Application number
US12/104,861
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English (en)
Inventor
Toshiya Nishizawa
Yasuhiro Maruyama
Hayato Murayama
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.)
Sanyo Denki Co Ltd
Original Assignee
Sanyo Denki Co Ltd
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Filing date
Publication date
Application filed by Sanyo Denki Co Ltd filed Critical Sanyo Denki Co Ltd
Assigned to SANYO DENKI CO., LTD. reassignment SANYO DENKI CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MARUYAMA, YASUHIRO, MURAYAMA, HAYATO, NISHIZAWA, TOSHIYA
Publication of US20080260526A1 publication Critical patent/US20080260526A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/02—Multi-stage pumps
    • F04D19/024—Multi-stage pumps with contrarotating parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/007—Axial-flow pumps multistage fans
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/522—Casings; Connections of working fluid for axial pumps 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
    • F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
    • F04D29/646—Mounting or removal of fans

Definitions

  • the present invention relates to a counter-rotating axial-flow fan used for cooling the inside of an electric appliance or the like.
  • Patent Document 1 discloses a counter-rotating axial-flow fan including a housing, which includes a housing body and a motor support frame.
  • the housing body includes an air channel having a suction opening on one side in an axial line direction and a discharge opening on the other side in the axial line direction.
  • the motor support frame is disposed in the central portion of the air channel.
  • a first impeller that is rotated by a first motor is disposed within a first space that is defined between the motor support frame in the housing and the suction opening.
  • a second impeller that is rotated by a second motor is disposed within a second space that is defined between the motor support frame in the housing and the discharge opening.
  • the first impeller rotates in a direction opposite to a rotating direction of the second impeller.
  • the housing is constituted from first and second divided housing units that are coupled through a coupling structure.
  • the first divided housing unit includes a first housing-body half-portion and a first support-frame half-portion.
  • the first housing-body half-portion includes a first cylindrical air-channel half-portion containing therein a major part of the first space.
  • the first support-frame half-portion is obtained by dividing the motor support frame into two along a virtual reference dividing plane that extends in a radial direction orthogonal to the axial line direction.
  • the second divided housing unit includes a second housing-body half-portion and a second support-frame half-portion.
  • the second housing-body half-portion includes a second cylindrical air-channel half-portion containing therein a major part of the second space.
  • the second support-frame half-portion is obtained by dividing the motor support frame into two along the virtual reference dividing plane.
  • the coupling structure is constituted from a fitting portion formed at one of the ends of the first cylindrical air-channel half-portion, and a fitted portion to be fitted with the fitting portion, formed at one of the ends of the second cylindrical air-channel half-portion.
  • the coupling of the first and second divided housing unit is not strong enough. Accordingly, when external force is applied, the first and second divided housing units tend to be decoupled or disconnected. For this reason, it is necessary to use screws, an adhesive, or the like for reinforcing the coupling between the first and second divide housing units.
  • An object of the present invention is therefore to provide a counter-rotating axial-flow fan in which first and second divided housing units are prevented from being broken when the first and second divided housing units are coupled.
  • Another object of the present invention is to provide a counter-rotating axial-flow fan in which the first and second divided housing units are prevented from being readily decoupled or disconnected, even when external force is applied.
  • a counter-rotating axial-flow fan of the present invention comprises a housing, a first impeller, a first motor, a second impeller, and a second motor.
  • the housing includes a housing body and a motor support frame.
  • the housing body includes an air channel having a suction opening on one side in an axial line direction and a discharge opening on the other side in the axial line direction.
  • the motor support frame is disposed in a central portion of the air channel.
  • the first impeller is disposed in a first space that is defined between the motor support frame in the housing and the suction opening, and includes a plurality of blades.
  • the first motor includes the first rotary shaft onto which the first impeller is fixed, and rotates the first impeller in a first rotating direction within the first space.
  • the second impeller is disposed in a second space that is defined between the motor support frame in the housing and the discharge opening, and includes a plurality of blades.
  • the second motor includes the second rotary shaft onto which the second impeller is fixed, and rotates the second impeller in a second rotating direction opposite to the first rotating direction within the second space.
  • the motor support frame includes a support frame body disposed in the central portion of the air channel and a plurality of webs disposed between the frame body and the housing body at predetermined intervals in a circumferential direction of the rotary shafts.
  • the webs connect the support frame body and the housing body.
  • the housing is constituted from first and second divided housing units that are coupled through a coupling structure.
  • the first divided housing unit includes a first housing-body half-portion and a first support-frame half-portion.
  • the first housing-body half-portion includes a first flange portion having the suction opening at one end thereof and a first cylindrical air-channel half-portion of which one end is integrally formed with the first flange portion and that contains therein a major part of the first space.
  • the first support-frame half-portion is obtained by dividing the motor support frame into two along a virtual reference dividing plane extending in a radial direction of the rotary shafts orthogonal to the axial line direction.
  • the second divided housing unit includes a second housing-body half-portion and a second support-frame half-portion.
  • the second housing-body half-portion includes a second flange portion having the discharge opening at one end thereof and a second cylindrical air-channel half-portion of which one end is integrally formed with the second flange portion and that contains therein a major part of the second space.
  • the second support-frame half-portion is obtained by dividing the motor support frame into two along the virtual reference dividing plane.
  • the coupling structure adopted in the present invention is constituted from a fitting portion formed at the other end of the first cylindrical air-channel half-portion, a fitted portion formed at the other end of the second cylindrical air-channel half-portion, a plurality of engaging members integrally formed with the first flange portion and arranged at intervals in the circumferential direction, and a plurality of engaged members integrally formed with the second flange portion and arranged at intervals in the circumferential direction.
  • the fitting portion is fitted into the fitted portion.
  • the engaging members extend along the first cylindrical air-channel half-portion.
  • the engaged members extend along the second cylindrical air-channel half-portion.
  • the engaging members are respectively engaged with the engaged members.
  • a plurality of first stopper portions are integrally formed with the first flange portion and arranged adjacent to the engaging members, and extend along the first cylindrical air-channel half-portion.
  • a plurality of second stopper portions are integrally formed with the second flange portion and arranged adjacent to the engaged members, and extend along the second cylindrical air-channel half-portion. Leading ends of the first stopper portions are respectively abutted onto leading ends of the second stopper portions when the plurality of engaging members are completely engaged with the engaged members.
  • the engaging members integrally formed with the first flange portion and the engaged members integrally formed with the second flange portion are employed for the coupling structure that couples the first and second divided housing units.
  • the coupling of the first and second divided housing units is attained not only by a fitting structure constituted from the fitting portion of the first cylindrical air-channel half-portion and the fitted portion of the second cylindrical air-channel half-portion, but also by engagement of the engaging members and the engaged members.
  • no force concentration will occur at the fitting structure of the first cylindrical air-channel half-portion and the second cylindrical air-channel half-portion.
  • the first and second divided housing units will not readily be decoupled or disconnected.
  • the first stopper portions are arranged adjacent to the engaging members, and the second stopper portions are arranged adjacent to the engaged members.
  • the leading ends of the first stopper portions adjacent to the engaging members are respectively abutted onto the leading ends of the second stopper portions adjacent to the engaged members.
  • first and second flange portions respectively have a contour shape including four corners, first to fourth corners, arranged in the circumferential direction
  • four of the engaging members and four of the first stopper portions are respectively arranged in the vicinity of the four corners of the first flange portion
  • four of the engaged members and four of the second stopper portions are respectively arranged in the vicinity of the four corners of the second flange portion.
  • two of the engaging members are arranged in a region defined between the first corner and the second corner
  • two of the first stopper portions are arranged in a region defined between the second corner and the third corner
  • two of the engaging members are arranged in a region defined between the third corner and the four corner
  • two of the first stopper portions are arranged in a region defined between the four corner and the first corner.
  • the engaged members are arranged in a region defined between the first corner and the second corner
  • two of the second stopper portions are arranged in a region defined between the second corner and the third corner
  • two of the engaged members are arranged in a region defined between the third corner and the four corner
  • two of the second stopper portions are arranged in a region defined between the four corner and the first corner.
  • the engaging members are integrally coupled to the first cylindrical air-channel half-portion, and the engaged members are integrally coupled to the second cylindrical air-channel portion.
  • the engaging and engaged members may be improved in mechanical strength. Further, after the engaging members have been engaged with the engaged members, the engaging and engaged members serve to reinforce the first and second cylindrical air-channel half-portions.
  • the engaging members, engaged members, and first and second stopper portions may be arranged in the following manner.
  • a first virtual diagonal line connecting two of the four corners opposed to each other in the radial direction of the rotary shafts and a second virtual diagonal line connecting remaining two of the four corners are assumed in the first flange portion, the engaging member and the first stopper portion corresponding to the engaging member are disposed so as to interpose the first or second virtual diagonal line therebetween. Further, none of the engaging members and none of the first stopper portions are disposed at the four corners through which the first or second virtual diagonal line passes.
  • the engaged member and the second stopper portion corresponding to the engaged member are disposed so as to interpose the third or fourth virtual diagonal line therebetween. Further, none of the engaged members and none of the second stopper portions are disposed at the four corners through which the third or fourth virtual diagonal line passes.
  • the engaging and engaged members of various types may be used.
  • the other of them may include a hole portion to be fitted with the claw portion.
  • at least one of the engaging member and the engaged member is bent when engaging the engaging member with the engaged member, and the claw portion and the hole portion get into engagement with each other once the engaging member is completely engaged with the engaged member.
  • the hole portion may be formed so as to allow for visual confirmation of the engagement of the claw portion engaged therewith.
  • the engaging member may readily be engaged with the engaged member just by elastically inserting the claw portion into the hole portion.
  • the hole portion is formed to allow for visual confirmation of the engagement of the claw portion engaged with the hole portion, the engagement may visually be confirmed. Accordingly, the engagement between the engaging and engaged members may readily be confirmed.
  • the engaging members and the first stopper portions are shaped not to protrude outside the first flange portion as the first flange portion is seen from the first cylindrical air-channel half-portion.
  • the engaged members and the second stopper portions are shaped not to protrude outside the second flange portion as the second flange portion is seen from the second cylindrical air-channel half-portion.
  • the engaging member integrally formed with the first flange portion and the engaged member integrally formed with the second flange portion are employed for the coupling structure that couples the first divided housing unit and the second divided housing unit.
  • the coupling of the first divided housing unit and the second divided housing unit are attained not only by a fitting structure constituted from the fitting portion of the first cylindrical air-channel half-portion and the engaged portion of the second cylindrical air-channel half-portion, but also by an engagement structure constituted from the engaging member and the engaged member.
  • no force concentration will occur at the fitting structure of the first cylindrical air-channel half-portion and the second cylindrical air-channel half-portion.
  • the first and second divided housing units will not be readily decoupled or disconnected.
  • the first stopper portions are provided adjacent to the engaging members, and the second stopper portions are provided adjacent to the engaged members.
  • the leading ends of the first stopper portions adjacent to the engaging members are respectively abutted onto the leading ends of the second stopper portions adjacent to the engaged members.
  • FIG. 1 is a cross-sectional view showing a half portion of a counter-rotating axial-flow fan in an embodiment of the present invention.
  • FIG. 2 is a perspective view of a housing of the counter-rotating axial-flow fan shown in FIG. 1 .
  • FIG. 3 is a plan view of the counter-rotating axial-flow fan shown in FIG. 1 .
  • FIG. 4 is a left side view of the counter-rotating axial-flow fan shown in FIG. 1 .
  • FIG. 5 is a partial cross-sectional view as taken along line V-V in FIG. 3 .
  • FIG. 6 is a cross-sectional view as taken along line VI-VI in FIG. 4 .
  • FIG. 7 is a perspective view of a first divided housing unit of the counter-rotating axial-flow fan shown in FIG. 1 .
  • FIG. 8 is a diagram for explaining how a lead-wire guide web of the counter-rotating axial-flow fan shown in FIG. 1 is arranged.
  • FIG. 9 is a perspective view of a second divided housing unit of the counter-rotating axial-flow fan shown in FIG. 1 .
  • FIG. 10 is a perspective view of a first impeller of the counter-rotating axial-flow fan shown in FIG. 1 .
  • FIG. 11 is a perspective view of a second impeller of the counter-rotating axial-flow fan shown in FIG. 1 .
  • FIG. 1 is a cross-sectional view showing a half portion of a counter-rotating axial-flow fan in the embodiment of the present invention.
  • the counter-rotating axial-flow fan in this embodiment includes a housing 1 , a first motor 3 , a first impeller 5 , a second motor 7 , and a second impeller 9 .
  • the housing 1 comprises a housing body 61 including an air channel 2 , a motor support frame 6 disposed in a central portion of the air channel 2 . Further, as shown in FIGS.
  • the housing 1 is constituted from a first divided housing unit 11 and a second divided housing unit 13 that are coupled through a coupling structure.
  • FIGS. 2 to 4 are a perspective view of the housing 1 , a plan view of the housing 1 , and a left side view of the housing 1 , respectively.
  • FIG. 5 is a partial cross-sectional view as taken along line V-V in FIG. 3 .
  • FIG. 6 is a cross-sectional view as taken along line VI-VI in FIG. 4 .
  • the first divided housing unit 11 is made of a synthetic resin or aluminum. As shown in FIG. 7 , the first divided housing unit 11 integrally includes a first housing-body half-portion 15 and a first support-frame half-portion 17 .
  • the first housing-body half-portion 15 includes a first flange portion 19 , a first cylindrical air-channel half-portion 21 , four engaging members 23 A to 23 D, and four first stopper portions 25 A to 25 D.
  • the first flange portion 19 has a contour of substantially a quadrilateral having four corners.
  • the four corners, a first corner 19 a , a second corner 19 b , a third corner 19 c , and a fourth corner 19 d are disposed in a circumferential direction of a rotary shaft 71 of the first motor 3 and a rotary shaft 171 of the second motor 7 that are arranged on the same axis line A.
  • This direction will be hereinafter simply referred to as the circumferential direction.
  • the first divided housing unit 11 has a suction opening 11 a at one end of the housing 1 in an axial line direction, which will be described later.
  • a first space S 1 is defined between the motor support frame 6 in the housing 1 and the suction opening 11 a .
  • the four corners of the first flange portion 19 are rounded.
  • a through-hole 19 e into which a fixture for mounting the counter-rotating axial-flow fan to an electric appliance is inserted, is formed in each of the four corners.
  • One end of the first cylindrical air-channel half-portion 21 is integrally formed with the first flange portion 19 .
  • the first cylindrical air-channel half-portion 21 contains therein a major part of the first space S 1 .
  • This first cylindrical air-channel half-portion 21 extends in the axial line direction of the rotary shafts 71 and 171 (which will be hereinafter simply referred to as the axial line direction).
  • wall portions 21 b that project outward in a radial direction of the rotary shafts 71 and 171 are formed at equidistant intervals in the circumferential direction, respectively.
  • a radial direction of the rotary shafts 71 and 171 which will be hereinafter simply referred to as the radial direction
  • flat surface portions 21 c are respectively formed at locations of an inner peripheral portion of the other end 21 a of the first cylindrical air-channel half-portion 21 , corresponding to the wall portions 21 b .
  • the inner peripheral portion of the other end 21 a including the flat surface portions 21 c constitutes a fitting portion.
  • the four engaging members 23 A to 23 D are integrally formed with the first flange portion 19 and the first cylindrical air-channel half-portion 21 , and are arranged at intervals in the circumferential direction.
  • the four engaging members 23 A to 23 D are respectively engaged with four engaged members 41 A to 41 D of the second divided housing unit 13 , which will be described later.
  • the four engaging members 23 A to 23 D are respectively arranged in the vicinity of the four corners 19 a to 19 d , being integrally coupled to the first cylindrical air-channel half-portion 21 .
  • Each of the engaging members 23 A to 23 D includes two plate portions 23 a and 23 b and three connecting portions 23 c to 23 e that are connected to the plate portions 23 a , 23 b .
  • the plate portions 23 a and 23 b are opposed to each other in a direction orthogonal to the axial line direction and a vertical direction in the pages of FIGS. 5 and 7 .
  • the three connecting portions 23 c to 23 e are arranged at predetermined intervals in the axial line direction.
  • the two connecting portions 23 c and 23 d completely extend in the vertical direction between the two plate portions 23 a and 23 b and partition a space defined between the two plate portions 23 a and 23 b .
  • the connecting portion 23 e connects only upper edge portions of the two plate portions 23 a and 23 b , slightly extending downward from between the two plate portions 23 a and 23 b .
  • an opening portion 23 f is formed among the two plate portions 23 a and 23 b , the connecting portion 23 e , and the first cylindrical air-channel half-portion 21 .
  • a hole portion 23 g that faces upward is formed between the connecting portions 23 d and 23 e.
  • the four first stopper portions 25 A to 25 D respectively have a shape of substantially a rectangular flat plate, being integrally formed with the first flange portion 19 .
  • Base portions of the first stopper portions are integrally coupled to the first cylindrical air-channel half-portion 21 .
  • the four stopper portions 25 A to 25 D extend in the axial line direction along the first cylindrical air-channel half-portion 21 so that the four stopper portions 25 A to 25 D do not protrude outside from the contour of the first flange portion 19 as the first flange portion is seen from the first cylindrical air-channel half-portion 21 . How the four first stopper portions 25 A to 25 B are disposed will be described later.
  • the first support-frame half-portion 17 includes a first support-frame-body half-portion 27 and five first web half-portions 28 A to 28 E.
  • the first support-frame-body half-portion 27 includes a circular plate portion 27 b having an opening portion 27 a in the center thereof and a peripheral wall portion 27 c that extends in the axial line direction from an outer peripheral portion of the circular plate portion 27 b .
  • a first metal bearing holder 77 made of brass is fixedly fitted into the opening portion 27 a , as shown in FIG. 1 .
  • a stator board 85 of the first motor 3 is disposed within a space defined, being bordered by the circular plate portion 27 b and the peripheral wall portion 27 c , as shown in FIG. 1 .
  • first support-frame-body half-portion 27 In the first support-frame-body half-portion 27 , four first through-hole half-portions 29 A to 29 D that pass through the first support-frame-body half-portion 27 in the axial line direction of the rotary shaft 71 of the first motor 3 are formed.
  • the four first through-hole half-portions 29 A to 29 D are formed at equidistant intervals in the circumferential direction.
  • One through-hole half-portion 29 A of the four first through-hole half-portions 29 A to 29 D communicates with an internal space of a first lead-wire guide-path half-portion 31 of the first web half-portion 28 A, which will be described later.
  • first web half-portions 28 A to 28 E are disposed at predetermined intervals in the circumferential direction between the peripheral wall portion 27 c of the first support-frame-body half-portion 27 and an inner peripheral surface of the first housing body half-portion 15 , thereby coupling the first support-frame-body half-portion 27 and the first housing body half-portion 15 .
  • the first web half-portion 28 A of the five first web half-portions 28 A to 28 E constitutes a web half-portion that includes therein the first lead-wire guide-path half-portion 31 .
  • This first web half-portion 28 A will be hereinafter simply referred to as the first lead-wire guide web half-portion 28 A. As shown in FIGS.
  • the first lead-wire guide web half-portion 28 A includes a bottom wall 28 a and a pair of side wall portions 28 b that respectively rise up from the bottom wall 28 a toward the second motor 7 .
  • the first lead-wire guide-path half-portion 31 is formed by a region bordered by the bottom wall 28 a and the pair of side wall portions 28 b .
  • one raised or convex portion 28 d protruding toward a second lead-wire guide web half-portion 55 A that will be described later, is formed on the side wall portions 28 b in the pair.
  • one recessed or concave portion 28 e which is recessed toward the bottom wall 28 a , is formed also in the side wall portions 28 b in the pair.
  • the raised portion 28 d and the recessed portion 28 e provided at one of the side wall portions 28 b in the pair are respectively opposed, in the circumferential direction, to the raised portion 28 d and the recessed portion 28 e provided at the other side wall portion 28 b in the pair.
  • the contour shapes of the raised portion 28 d and the recessed portion 28 e are respectively an isosceles trapezoid having two non-parallel opposite sides of equal length.
  • the raised portion 28 d and the recessed portion 28 e respectively have two inclined surfaces which correspond to the trapezoid's pair of non-parallel opposite sides of equal length, and one of the two inclined surfaces 28 d 1 of the raised portion 28 d is continuous with one of the two inclined surfaces 28 e 1 of the recessed portion 28 e adjacent to the raised portion 28 d .
  • the raised portion 28 d protrudes toward the second lead-wire guide web half-portion 55 A beyond a virtual reference dividing plane F.
  • the virtual reference dividing plane F is the dividing plane along which a motor support frame is divided into two, the first support-frame half-portion 17 and the second support-frame half-portion 35 that will be described later.
  • an opening portion 21 d which opens toward an inside of the first lead-wire guide web half-portion 28 A, is formed in the first cylindrical air-channel half-portion 21 in the vicinity of a location to which the first lead-wire guide web half-portion 28 A is joined. Lead wires L are led out through the opening portion 21 d.
  • the second divided housing unit 13 is also made of a synthetic resin or aluminum. As shown in FIG. 9 , the second divided housing unit 13 integrally includes a second housing-body half-portion 33 and a second support-frame half-portion 35 .
  • the second housing-body half-portion 33 includes a second flange portion 37 , a second cylindrical air-channel half-portion 39 , four engaged members 41 A to 41 D, and four second stopper portions 43 A to 43 D.
  • the second flange portion 37 has a contour of substantially a quadrilateral having four corners. The four corners, a first corner 37 a , a second corner 37 b , a third corner 37 c , and a fourth corner 37 d are disposed in the circumferential direction.
  • the second flange portion 37 has a discharge opening 13 a at the other end of the housing 1 in the axial line direction.
  • a second space S 2 is defined between the motor support frame 6 in the housing 1 and the discharge opening 13 a .
  • the four corners 37 a to 37 d of the second flange portion 37 are rounded, and a through-hole 37 e , into which the fixture for mounting the counter-rotating axial-flow fan to the electric appliance is inserted, is formed in each of the four corners.
  • One end of the second cylindrical air-channel half-portion 39 is integrally formed with the second flange portion 37 .
  • the second cylindrical air-channel half-portion 39 contains therein a major part of the second space S 2 .
  • Four flat surface portions 45 are formed at equal angle intervals in the circumferential direction on an outer peripheral portion (a fitted portion) of the other end 39 a of the second cylindrical air-channel portion 39 .
  • the four flat surface portions 45 come into contact with the flat surface portions 21 c of the other end 21 a of the first cylindrical air-channel half-portion 21 when the first divided housing unit 11 and the second divided housing unit 13 are coupled.
  • Positioning of the first divided housing unit 11 and the second divided housing unit 13 in the circumferential direction is determined by aligning the flat surface portions 21 c and the flat surface portions 45 .
  • the four engaged members 41 A to 41 D are integrally formed with the second flange portion 37 and arranged at intervals in the circumferential direction.
  • the four engaged members 41 A to 41 D are respectively disposed in the vicinity of the four corners 37 a to 37 d of the second flange portion 37 with the four engaged members 41 A to 41 D being integrally coupled to the second cylindrical air-channel half-portion 39 .
  • the four engaged members 41 A to 41 D extend along the second cylindrical air-channel half-portion 39 in the axial line direction so that the four engaged members 41 A to 41 D do not protrude outside from the contour of the second flange portion 37 as the second flange portion is seen from the second cylindrical air-channel half-portion 39 .
  • the engaged members 41 A to 41 D each include a support portion 47 integrally provided at the second flange portion 27 , a rib 49 coupled to the support portion 47 and the second cylindrical air-channel half-portion 39 , and a claw-forming member 51 with one end thereof supported by the support portion 47 .
  • the claw-forming member 51 includes a plate-like portion 51 a , a claw portion 51 b integrally formed with the plate-like portion 51 a , and a projecting portion 51 c .
  • the plate-like portion 51 a is connected to the support portion 47 , being spaced from the rib 49 .
  • the plate-like portion 51 a extends from the support portion 47 toward the first divided housing unit 11 .
  • the claw portion 51 b projects from a leading end of the plate-like portion 51 a in a direction orthogonal to the surface of the plate-like portion 51 a , or in the upward direction in the page of FIG. 5 .
  • the upper side of the claw portion 51 b has an inclined surface 51 d so that the thickness of the claw portion 51 b increases more toward the support portion 47 .
  • the respective claw portions 51 b of the engaged members 41 A and 41 B project in the upward direction in the page of FIG. 9
  • the respective claw portions 51 b of the engaged members 41 C and 41 D project in the downward direction in the page of FIG. 9 .
  • the projecting portion 51 c is spaced from the claw portion 51 b in the axial line direction.
  • the projecting portion 51 c projects from the plate-like portion 51 a in the same direction as the one where the claw portion 51 b projects.
  • a cross-sectional surface of the projecting portion 51 c is substantially a rectangle in shape. It will be described later in detail how the four engaged members 41 A to 41 D are respectively engaged with the four engaging members 23 A to 23 D of the first divided housing unit 11 .
  • the four second stopper portions 43 A to 43 D have the shape of a rectangular flat plate integrally formed with the second flange portion 37 , and are arranged adjacent to the four engaged members 41 A to 41 D, respectively.
  • the four second stopper portions 43 A to 43 D are integrally coupled to the second cylindrical air-channel half-portion 39 .
  • the four second stopper portions 43 A to 43 D extend along the second cylindrical air-channel half-portion 39 in the axial line direction so that the four second stopper portions 43 A to 43 D do not protrude outside from the contour of the second flange portion 37 as the second flange portion is seen from the second cylindrical air-channel half-portion 39 .
  • the first corner 37 a and the third corner 37 c are opposed to each other in the radial direction with respect to the axis line A.
  • the engaged members 41 A and 41 C are also opposed to each other in the radial direction.
  • the second stopper portions 43 A and 43 C are provided for the engaged members 41 A and 41 C, respectively.
  • the engaged member 41 A and the second stopper portion 43 A are arranged so as to interpose the virtual diagonal line D 3 therebetween
  • the engaged member 41 C and the second stopper portion 43 C are arranged so as to interpose the virtual diagonal line D 3 therebetween.
  • the second corner 37 b and the fourth corner 37 d are opposed to each other in the radial direction with respect to the axis line A.
  • the engaged members 41 B and 41 D are also opposed to each other in the radial direction.
  • the second stopper portions 43 B and 43 D are provided for the engaged members 41 B and 41 D, respectively.
  • the engaged members 41 C and 41 D are arranged, and in a region defined between the fourth corner 37 d and the first corner 37 a , the second stopper portions 43 D and 43 A are arranged.
  • the four first stopper portions 25 A to 25 D shown in FIGS. 4 and 7 are also arranged adjacent to the four engaging members 23 A to 23 D, respectively.
  • a positional relationship among the four first stoppers 25 A to 25 D and the four engaging members 23 A to 23 D is the same as the positional relationship among the four second stopper portions 43 A to 43 D and the four engaged members 41 A to 41 D, shown in FIG. 6 .
  • the first corner 19 a and the third corner 19 c are opposed to each other in the radial direction with respect to the axis line A.
  • the engaging members 23 A and 23 C are opposed to each other in the radial direction.
  • the first stopper portions 25 A and 25 C are provided for the engaging members 23 A and 23 C, respectively.
  • the engaging member 23 A and the first stopper portion 25 A are arranged so as to interpose the virtual diagonal line D 1 therebetween, and the engaging member 23 C and the first stopper portion 25 C are arranged so as to interpose the virtual diagonal line D 1 therebetween.
  • the second corner 19 b and the fourth corner 19 d are opposed to each other in the radial direction with respect to the axis line A.
  • the engaging members 23 B and 23 D are opposed to each other in the radial direction.
  • the first stopper portions 25 B and 25 D are provided for the engaging members 23 B and 23 D, respectively.
  • the engaging members 23 A and 23 B are arranged, and in a region defined between the second corner 19 b and the third corner 19 c , the first stopper portions 25 B and 25 C are arranged. Then, in a region defined between the third corner 19 c and the fourth corner 19 d , the engaging members 23 C and 23 D are arranged, and in a region defined between the fourth corner 19 d and the first corner 19 a , the first stopper portions 25 D and 25 A are arranged.
  • the four first stopper portions 25 A to 25 D and the four second stopper portions 43 A to 43 D are shaped and sized so that leading ends of the four first stopper portions 25 A to 25 D are respectively abutted onto leading ends of the four second stopper portions 43 A to 43 D, when the claw portions 51 b are completely engaged with the hole portions 23 g of the engaging members 23 A to 23 D, respectively.
  • the second support frame half-portion 35 includes a second support-frame-body half-portion 53 and five second web half-portions 55 A to 55 E.
  • the second support-frame-body half-portion 53 includes a circular plate portion 53 b having an opening portion 53 a in the center thereof and a peripheral wall portion 53 c that extends in the axial line direction from an outer peripheral portion of the circular plate portion 53 b .
  • a second metal bearing holder 177 made of brass is fixedly fitted into the opening portion 53 a , as shown in FIG. 1 .
  • a stator board 185 of the second motor 7 is arranged, as shown in FIG. 1 .
  • the four second through-hole half-portions 57 A to 57 D are formed at equidistant intervals in the circumferential direction of the rotary shaft 171 (shown in FIG. 1 ).
  • One through-hole half-portion 57 A of the four second through-hole half-portions 57 A to 57 D communicates with an internal space of a second lead-wire guide-path half-portion 59 of the second web half-portion 55 A, which will be described later.
  • the four second through-hole half-portions 57 A to 57 D are formed to have the same shape as the four first through-hole half-portions 29 A to 29 D of the first support-frame-body half-portion 27 , respectively.
  • the five second web half-portions 55 A to 55 E are arranged at predetermined intervals in the circumferential direction between the peripheral wall portion 53 c of the second support-frame-body half-portion 53 and an inner peripheral surface of the second housing-body half-portion 33 , thereby connecting the second support-frame-body half-portion 53 and the second housing-body half-portion 33 .
  • the second web half-portion 55 A of the five second web half-portions 55 A to 55 E constitutes the web half-portion that includes a second lead-wire guide-path half-portion 59 therein.
  • the second web half-portion 55 A will be hereinafter simply referred to as the second lead-wire guide web half-portion 55 A.
  • the second lead-wire guide web half-portion 55 A includes a bottom wall 55 a and a pair of side wall portions 55 b that respectively rise up from the bottom wall 55 a .
  • the second lead-wire guide-path half-portion 59 is formed by a region bordered by the bottom wall 55 a and the pair of side wall portions 55 b .
  • One raised or convex portion 55 d protruding toward the first lead-wire guide web half-portion 28 A, is formed on the side wall portions 55 b in the pair.
  • one recessed or concave portion 55 e which is recessed toward the bottom wall 55 a , is formed also in the side wall portions 55 b in the pair.
  • the raised portion 55 d and the recessed portion 55 e provided at one of the side wall portions 55 b in the pair are respectively opposed, in the circumferential direction, to the raised portion 55 d and the recessed portion 55 e provided at the other side wall portion 55 b in the pair. As shown in FIG.
  • the raised portion 55 d protrudes toward the first lead-wire guide web half-portion 28 A beyond the virtual reference dividing plane F, which is the dividing plane along which the motor support frame is divided into the first support-frame half-portion 17 and the second support-frame half-portion 35 .
  • an opening portion 39 d that opens toward an inside of the second lead-wire guide web half-portion 55 A is formed in the second cylindrical air-channel half-portion 39 in the vicinity of a location to which the second lead-wire guide web half-portion 55 A is joined. It will be described in detail how the first lead-wire guide web half-portion 28 A and the second lead-wire guide half-portion 55 A are coupled.
  • the first divided housing unit 11 and the second divided housing unit 13 are coupled in the following manner.
  • the first motor 3 (shown in FIG. 1 ) and the first impeller 5 are arranged within the first divided housing unit 11 , and lead wires are arranged within the first lead-wire guide web half-portion 28 A.
  • a first axial-flow fan unit is thus assembled.
  • the second motor 7 (shown in FIG. 1 ) and the second impeller 9 are arranged within the second divided housing unit 13 , and the lead wires are arranged within the second lead-wire guide web half-portion 55 A.
  • a second axial-flow fan unit is thus assembled.
  • the first divided housing unit 11 and the second divided housing unit 13 are coupled.
  • the first divided housing unit 11 and the second divided housing unit 13 are brought close to each other, and then leading ends of the claw portions 51 b of the four engaged members 41 A to 41 D of the second divided housing unit 13 are inserted into the opening portions 23 f of the four engaging members 23 A to 23 D of the first divided housing unit 11 , respectively.
  • the inclined surface 51 d of the claw portion 51 b comes into contact with a lower edge of the connecting portion 23 e .
  • the plate-like portion 51 a bends so as to be closer to the rib 49 .
  • the connecting portion 23 e is fitted into a recessed or concave portion that is defined between the claw portion 51 b and the raised portion 51 c of the engaged member 41 B.
  • the claw portion 51 b is thereby engaged with the hole portion 23 g .
  • the rib 49 functions as a stopper that prevents the claw-forming member 51 from bending more than necessary.
  • the projecting portion 51 c serves as a stopper that prevents the claw portion 51 b from moving toward the first cylindrical air-channel half-portion 21 .
  • the claw portion 51 b and the hole portion 23 g are formed so as to allow for visual confirmation of the engagement when the claw portion 51 b is engaged with the hole portion 23 g.
  • the fitting portion formed by the inner peripheral surface portion of the other end 21 a of the first cylindrical air-channel half-portion 21 is fitted into the fitted portion formed by the outer peripheral surface portion of the other end 39 a of the second cylindrical air-channel half-portion 39 , thereby forming a fitting structure.
  • the first divided housing unit 11 is coupled to the second divided housing unit 13 not only by the fitting structure mentioned above but also by the engagement of the claw portions 51 b mentioned above and the hole portions 23 g of the engaging members 23 A to 23 D. Then, with the first divided housing unit 11 coupled to the second divided housing unit 13 as described above, leading ends of the first stopper portions 25 A to 25 D are respectively abutted onto leading ends of the four second stopper portions 43 A to 43 D.
  • a housing body 61 is constituted from the first housing-body half-portion 15 included in the first divided housing unit 11 and the second housing-body half-portion 33 included in the second divided housing unit 13 that are coupled as mentioned above and as shown in FIG. 2 .
  • a motor support frame 63 is constituted from the first support-frame half-portion 17 included in the first divided housing unit 11 and the second support-frame half-portion 35 included in the second divided housing unit 13 .
  • the first support-frame half-portion 17 and the second support-frame half-portion 35 are obtained by dividing the motor support frame 63 into two along the virtual reference dividing plane F that extends in the radial direction.
  • a support frame-body 65 is constituted from the first support-frame body half-portion 27 included in the first support-frame half-portion 17 and the second support-frame-body half-portion 53 included in the second support-frame half-portion 35 .
  • the first through-hole half-portions 29 A to 29 D of the first divided housing unit 11 are respectively combined with the second through-hole half-portions 57 A to 57 D of the second divided housing unit 13 , thereby forming four through-holes 67 A to 67 D.
  • the four through-holes 67 A to 67 D partially define an internal space IS of the support frame body 65 .
  • the five first web half-portions 28 A to 28 E included in the first support-frame half-portion 17 are respectively combined with the five second web half-portions 55 A to 55 E included in the second support-frame half-portion 35 , thereby forming five webs 69 A to 69 E.
  • the five webs 69 A to 69 E constitute stationary blades.
  • the web 69 A of the five webs 69 A to 69 E constitutes the lead-wire guide web 69 A.
  • This lead-wire guide web 69 A is constituted by combining the first lead-wire guide web half-portion 28 A with the second lead-wire guide web half-portion 55 A. In this lead-wire guide web 69 A, as shown in FIG.
  • the raised portion 28 d of the first lead-wire guide web half-portion 28 A is fitted into the recessed portion 55 e of the second lead-wire guide web half-portion 55 A, and the recessed or concave portion 28 e of the first lead wire guide web half-portion 28 A is fitted with the raised or convex portion 55 d of the second lead wire guide web half-portion 55 A.
  • a lead-wire guide path GP (as shown in FIG. 2 ) is formed within the lead-wire guide web 69 A.
  • the lead-wire guide path GP guides a plurality of lead wires and a plurality of signal lines for supplying power to the first motor 3 and the second motor 7 . Then, as shown in FIG.
  • a plurality of the lead wires L shown by dotted lines are led out from the lead wire guide path of the lead-wire guide web 69 A through the opening portions 21 d and 39 d .
  • the remaining four webs 69 B to 69 E of the five webs 69 A to 69 E are respectively divided into the first web half-portion 28 B and the second web half-portion 55 B, the first web half-portion 28 C and the second web half-portion 55 C, the first web half-portion 28 D and the second web half-portion 55 D, and the first web half-portion 28 E and the second web half-portion 55 E, along the virtual reference dividing plane F.
  • the first motor 3 includes the rotary shaft 71 , a stator 73 , and a rotor 75 .
  • the rotary shaft 71 is rotatably supported onto the first bearing holder 77 by two bearings 79 fitted into the first bearing holder 77 .
  • the stator 73 includes a stator core 81 , exciting windings 83 , and a circuit board 85 .
  • the stator core 81 is formed by lamination of a plurality of steel plates and is fixed to the first bearing holder 77 .
  • the stator core 81 includes a plurality of projecting pole portions 81 a arranged in the circumferential direction of the rotary shaft 71 .
  • the exciting windings 83 are respectively attached to the projecting pole portions 81 a through insulators 84 .
  • the circuit board 85 is arranged along the first support-frame-body half-portion 27 , being disposed apart from the first support-frame-body half-portion 27 by predetermined spacing.
  • An exciting current supply circuit for flowing exciting current to the exciting windings 83 is mounted on the circuit board 85 .
  • the exciting current supply circuit on the circuit board 85 and the exciting windings 83 are electrically connected by winding lead wires of the exciting windings 83 around a terminal pin 87 that passes through a through-hole of the circuit board 85 and is soldered to an electrode on the circuit board 85 .
  • a plurality of board through-holes 85 a are formed in the circumferential direction of the rotary shaft 71 at equidistant intervals. Air that has flown from around the stator 73 toward the four first through-hole half-portions 29 A to 29 D of the first support-frame-body half-portion 27 passes through the board through-holes 85 a.
  • the rotor 75 includes an annular member 89 and a plurality of permanent magnets 91 fixed onto an inner peripheral surface of the annular member 89 .
  • the annular member 89 is fixed inside a peripheral wall portion 93 a of a cup-like member 93 of the first impeller 5 , which will be described later.
  • the first impeller 5 includes the cup-like member 93 and nine blades 95 .
  • the cup-like member 93 includes the peripheral wall portion 93 a onto which the nine blades 95 are fixed and a bottom wall portion 93 b integrally formed with one end of the peripheral wall portion 93 a .
  • One end of the rotary shaft 71 of the first motor 3 is connected to the bottom wall portion 93 b .
  • a plurality of ventilation slots 93 c are formed in the bottom wall portion 93 b and are disposed in the circumferential direction of the rotary shaft 71 at equidistant intervals.
  • Each ventilation slot 93 c has an elongated shape that extends in the radial direction of the rotary shaft 71 of the first motor 3 .
  • the ventilation slots 93 c serve to introduce air sucked through the suction opening 11 a into an internal space of the first motor 3 .
  • the annular member 89 of the rotor 75 is fixed inside the peripheral wall portion 93 a of the cup-like member 93 of the first impeller 5 .
  • the first impeller 5 is rotated by the first motor 3 in a first rotating direction R 1 , which is a counterclockwise direction in the page of FIG. 10 , within the first space S 1 .
  • the second motor includes the rotary shaft 171 , a stator 173 , and a rotor 175 .
  • the rotary shaft 171 is rotatably supported onto the second bearing holder 177 by two bearings 179 fitted into the second bearing holder 177 .
  • the rotary shaft 171 rotates in a direction opposite to the rotating direction of the rotary shaft 71 of the first motor 3 .
  • Structures of the rotary shaft 171 , stator 173 , and rotor 175 are the same as those of the rotary shaft 71 , stator 73 , and rotor 75 of the first motor 3 , respectively.
  • 100 is added to reference numerals assigned to the rotary shaft, stator, and rotor of the first motor 3 , and descriptions of the rotary shaft, stator, and rotor of the second motor 7 will be omitted.
  • the second impeller 9 includes a cup-like member 193 and seven blades 195 .
  • the cup-like member 193 includes a peripheral wall portion 193 a onto which the seven blades 195 are fixed and a bottom wall portion 193 b integrally formed with one end of the peripheral wall portion 193 a .
  • One end of the rotary shaft 171 of the second motor 7 is fixed onto the bottom wall portion 193 b .
  • a plurality of ventilation slots 193 c are formed in the bottom wall portion 193 b and are disposed at equidistant intervals in the circumferential direction of the rotary shaft 171 , being disposed apart from the rotary shaft 171 .
  • Each ventilation slot 193 c has an elongated arc shape and extends in the circumferential direction of the rotary shaft 171 of the second motor 7 .
  • the ventilation slots 193 c serve to discharge air introduced into the internal space of the second motor 7 to the outside.
  • an annular member 189 of the rotor 175 of the second motor 7 is fixed inside the peripheral wall portion 193 a of the cup-like member 193 of the second impeller 9 .
  • the rotary shaft 171 of the second motor 7 rotates in the direction opposite to the rotating direction of the rotary shaft 71 of the first motor 3 .
  • the second impeller 9 is rotated by the second motor 7 in a second rotating direction R 2 , which is opposite to the first rotating direction R 1 and is a clockwise direction in the page of FIG. 11 , within the second space S 2 .
  • At least one raised portion 28 d is provided at the side wall portions 28 b in the pair of the first web half-portions 28 A to 28 E, and at least one raised or convex portion 55 d is provided at the side wall portions 55 b in the pair of the second web half-portions 55 A to 55 E. Then, the raised portions 28 d and 55 d extend beyond the virtual reference dividing plane F. The height of the side wall portions 28 b and 55 b may be thereby increased. As a result, lead wires may be much less likely to protrude or run off from between the side wall portions 28 b and between the side wall portions 55 b .
  • the engaging members 23 A to 23 D integrally formed with the first flange portion 19 and the engaged members 41 A to 41 D integrally formed with the second flange portion 37 are employed for the coupling structure that couples the first divided housing unit 11 and the second divided housing unit 13 .
  • the coupling of the first divided housing unit 11 and the second divided housing unit 13 are attained not only by the engagement of the engaging members 23 A to 23 D and the engaged members 41 A to 41 D as well as by the fitting of the other end 21 a of the first cylindrical air-channel half-portion 21 and the other end 39 a of the second cylindrical air-channel half-portion 39 .
  • no force concentration will occur at the fitting structure of the first cylindrical air-channel half-portion and the second cylindrical air-channel half-portion.
  • the first and second divided housing units will not be readily disconnected or decoupled.
  • first stopper portions 25 A to 25 D are respectively provided adjacent to the engaging members 23 A to 23 D
  • second stopper portions 43 A to 43 D are respectively provided adjacent to the engaged members 41 A to 41 D.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US12/104,861 2007-04-18 2008-04-17 Counter-rotating axial-flow fan Abandoned US20080260526A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-109606 2007-04-18
JP2007109606A JP4076570B1 (ja) 2007-04-18 2007-04-18 二重反転式軸流送風機

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US20080260526A1 true US20080260526A1 (en) 2008-10-23

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US12/104,861 Abandoned US20080260526A1 (en) 2007-04-18 2008-04-17 Counter-rotating axial-flow fan

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US (1) US20080260526A1 (fr)
EP (1) EP1983198B1 (fr)
JP (1) JP4076570B1 (fr)
CN (1) CN101311552B (fr)
TW (1) TWI460353B (fr)

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US20120003109A1 (en) * 2010-07-01 2012-01-05 Nidec Corporation Blower fan
US20160333886A1 (en) * 2013-07-12 2016-11-17 Lars Skovlund Andersen Axial compressor and use of an axial compressor
US20180124948A1 (en) * 2016-10-27 2018-05-03 Fanuc Corporation Fan attachment structure and fan
USD818103S1 (en) * 2014-12-02 2018-05-15 Ebm-Papst Mulfingen Gmbh & Co. Kg Ventilator
US10837448B2 (en) * 2018-03-30 2020-11-17 Nidec Servo Corporation Counter-rotating axial flow fan
EP3839261A4 (fr) * 2018-10-15 2021-11-24 Guangdong Midea White Home Appliance Technology Innovation Center Co., Ltd. Ventilateur contrarotatif
US20220325717A1 (en) * 2021-04-13 2022-10-13 Stokes Technology Development Ltd. Counter-rotating axial air moving device
US20230120451A1 (en) * 2021-10-19 2023-04-20 Nidec Corporation Motor and axial fan

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JP4682221B2 (ja) * 2008-03-25 2011-05-11 山洋電気株式会社 直列接続型送風装置
JP5298371B2 (ja) * 2008-12-26 2013-09-25 Ｔｏｔｏ株式会社 ファン装置
JP5945912B2 (ja) * 2012-02-09 2016-07-05 日本電産株式会社 ファン
JP6320630B2 (ja) * 2015-04-27 2018-05-09 三菱電機株式会社 換気扇
EP3460248A1 (fr) * 2017-09-22 2019-03-27 Ta-Chang Liu Ventilateur de suralimenteur double moteur et double roue
JP7226903B2 (ja) * 2018-03-30 2023-02-21 日本電産サーボ株式会社 二重反転式ファン

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Publication number Priority date Publication date Assignee Title
US20120003109A1 (en) * 2010-07-01 2012-01-05 Nidec Corporation Blower fan
US20160333886A1 (en) * 2013-07-12 2016-11-17 Lars Skovlund Andersen Axial compressor and use of an axial compressor
USD818103S1 (en) * 2014-12-02 2018-05-15 Ebm-Papst Mulfingen Gmbh & Co. Kg Ventilator
US20180124948A1 (en) * 2016-10-27 2018-05-03 Fanuc Corporation Fan attachment structure and fan
US10856435B2 (en) * 2016-10-27 2020-12-01 Fanuc Corporation Fan attachment structure and fan
US10837448B2 (en) * 2018-03-30 2020-11-17 Nidec Servo Corporation Counter-rotating axial flow fan
EP3839261A4 (fr) * 2018-10-15 2021-11-24 Guangdong Midea White Home Appliance Technology Innovation Center Co., Ltd. Ventilateur contrarotatif
US11661943B2 (en) 2018-10-15 2023-05-30 Guangdong Midea White Home Appliance Technology Innovation Center Co., Ltd. Counter-rotating fan
US20220325717A1 (en) * 2021-04-13 2022-10-13 Stokes Technology Development Ltd. Counter-rotating axial air moving device
US11512704B2 (en) * 2021-04-13 2022-11-29 Stokes Technology Development Ltd. Counter-rotating axial air moving device
US20230120451A1 (en) * 2021-10-19 2023-04-20 Nidec Corporation Motor and axial fan
US11873840B2 (en) * 2021-10-19 2024-01-16 Nidec Corporation Motor and axial fan

Also Published As

Publication number Publication date
TWI460353B (zh) 2014-11-11
CN101311552B (zh) 2011-10-19
JP4076570B1 (ja) 2008-04-16
EP1983198A3 (fr) 2014-06-25
TW200918761A (en) 2009-05-01
EP1983198B1 (fr) 2018-08-08
EP1983198A2 (fr) 2008-10-22
CN101311552A (zh) 2008-11-26
JP2008267229A (ja) 2008-11-06

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SANYO DENKI CO., LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:NISHIZAWA, TOSHIYA;MARUYAMA, YASUHIRO;MURAYAMA, HAYATO;REEL/FRAME:020825/0804

Effective date: 20080414

STCB Information on status: application discontinuation

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