WO2021192656A1 - 電動送風機 - Google Patents

電動送風機 Download PDF

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Publication number
WO2021192656A1
WO2021192656A1 PCT/JP2021/004501 JP2021004501W WO2021192656A1 WO 2021192656 A1 WO2021192656 A1 WO 2021192656A1 JP 2021004501 W JP2021004501 W JP 2021004501W WO 2021192656 A1 WO2021192656 A1 WO 2021192656A1
Authority
WO
WIPO (PCT)
Prior art keywords
hub
inner peripheral
blade
centrifugal fan
peripheral side
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.)
Ceased
Application number
PCT/JP2021/004501
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
哲夫 嶋崎
上野　信人
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.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
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 Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Priority to JP2022509358A priority Critical patent/JPWO2021192656A1/ja
Priority to CN202180021856.5A priority patent/CN115298443A/zh
Priority to EP21774400.2A priority patent/EP4130486A4/en
Publication of WO2021192656A1 publication Critical patent/WO2021192656A1/ja
Anticipated expiration legal-status Critical
Ceased 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
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/20—Rotors
    • F05D2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
    • F05D2240/303—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor related to the leading edge of a rotor blade

Definitions

  • Electric blowers are used in various electric devices such as vacuum cleaners.
  • a centrifugal fan is used in the electric blower mounted on the vacuum cleaner in order to obtain a high suction pressure.
  • the centrifugal fan is attached to the rotating shaft of the electric fan of the electric fan, and generates a desired wind pressure by rotating at a high speed.
  • Patent Document 2 discloses an electric blower capable of obtaining a high suction pressure by providing a resin inducer that rectifies the air sucked into the centrifugal fan on the intake port side of the centrifugal fan.
  • the intake port is circular, and the diameter of the virtual circle formed by connecting the tips of the inner peripheral side ends of each of the plurality of blades is the diameter of the intake port. It is preferably 87% or less of the diameter.
  • the outlet angle of the outer peripheral side portion is preferably 40 degrees or less.
  • FIG. 8 is a diagram showing the relationship between the hub and the blade in the centrifugal fan according to the embodiment.
  • FIG. 9 is an enlarged cross-sectional view of the centrifugal fan according to the embodiment.
  • FIG. 10 is a diagram showing the relationship between the stress of the blade in the centrifugal fan according to the embodiment and the length of the portion of the inner peripheral end of the blade that protrudes from the opening edge of the intake port toward the center. ..
  • FIG. 11A is a top view of a conventional centrifugal fan.
  • FIG. 11B is a cross-sectional view of a conventional centrifugal fan in line XIb-XIb of FIG. 11A.
  • the X-axis, Y-axis, and Z-axis represent the three axes of the three-dimensional Cartesian coordinate system.
  • the X-axis and the Y-axis are orthogonal to each other and both are orthogonal to the Z-axis.
  • the Z-axis direction is the direction of the axis C of the rotating shaft 11a.
  • the rotating shaft 11a is a long shaft that serves as a center when the rotor 11 rotates.
  • the rotating shaft 11a is, for example, a metal rod.
  • the rotation shaft 11a is fixed to the center of the rotor 11.
  • the rotating shaft 11a is fixed to the rotor core 11b in a state of penetrating the center of the rotor core 11b of the rotor 11 so as to extend to both sides of the rotor 11.
  • the rotary shaft 11a is fixed to the rotor core 11b by, for example, press-fitting or shrink-fitting into the central hole of the rotor core 11b.
  • the winding coil 11c has a coil wound around each of a plurality of teeth of the rotor core 11b. This coil is wound around the teeth multiple times. Specifically, the coil is a distributed winding coil that is wound around a tooth via an insulator.
  • the stator 12 is located facing the rotor 11 and generates a magnetic force acting on the rotor 11. Specifically, the stator 12 is arranged so as to surround the rotor core 11b of the rotor 11. The stator 12 constitutes a magnetic circuit together with the rotor 11 which is an armature.
  • a centrifugal fan 20 is attached to the tip of the rotating shaft 11a protruding from the first bearing 13.
  • the part where the centrifugal fan 20 is attached (the part on the first bearing 13 side) is called the output shaft, and the part on the opposite side to the centrifugal fan 20 side (the part on the second bearing 14 side) is opposite. It is called the output shaft.
  • the commutator 15 has a plurality of commutator pieces arranged in an annular shape so as to surround the rotation shaft 11a.
  • the plurality of commutator pieces are isolated from each other in the rotation direction of the rotation shaft 11a.
  • Each of the plurality of commutator pieces is electrically connected to the winding coil 11c of the rotor 11.
  • the brush 16 is arranged so as to be slidable with the commutator 15.
  • a pair of brushes 16 are provided.
  • the pair of brushes 16 are arranged to face each other so as to sandwich the commutator 15.
  • the brush 16 receives a pressing force from a brush spring such as a torsion spring and is in sliding contact with the commutator 15, and is arranged so as to be movable in the radial direction from the outer circumference of the rotating shaft 11a toward the axis C.
  • the brush 16 is housed in, for example, a brush cage.
  • the centrifugal fan 20 has an intake port 20a (suction port) for sucking air and an exhaust port 20b (outlet) for discharging the air sucked from the intake port 20a.
  • the centrifugal fan 20 has a shroud 21 having an intake port 20a, a hub 22 facing the shroud 21, and a plurality of blades 23 arranged between the shroud 21 and the hub 22. The detailed configuration of the centrifugal fan 20 will be described later.
  • the hub 22 of the centrifugal fan 20 is sandwiched between the first backing plate 32 and the second backing plate 33, and the first backing plate 32 and the second backing plate 33 sandwiching the hub 22 are sandwiched. , It is further sandwiched between the fan boss 31 screwed into the rotating shaft 11a and the fan stopper 34 to pressurize. As a result, the centrifugal fan 20 can be pressed and held on the rotating shaft 11a by the fixing member 30.
  • the air discharged from the centrifugal fan 20 flows into the air guide 40.
  • the air guide 40 has a function of forming an air flow path.
  • the air guide 40 has a function of rectifying the flow of air discharged from the centrifugal fan 20 and smoothly flowing it into the motor case 70.
  • the air guide 40 guides the air compressed by the centrifugal fan 20 to the inside of the motor case 70 while gradually returning it to atmospheric pressure.
  • the air guide 40 is arranged with a gap between it and the side wall portion 52 of the fan case 50.
  • the air that has flowed into the air guide 40 flows into the motor case 70 through a ventilation path composed of a plurality of diffuser blades 41 and through a gap between the air guide 40 and the side wall portion 52 of the fan case 50.
  • a circular through hole 22b is provided in the central portion of the hub 22.
  • the rotation shaft 11a of the rotor 11 is inserted into the through hole 22b.
  • the centrifugal fan 20 can be fixed to the rotating shaft 11a by inserting the rotating shaft 11a into the through hole 22b and fixing the hub 22 to the rotating shaft 11a with the fixing member 30.
  • the inlet angle ⁇ 1 when the inlet angle ⁇ 1 is 41.8 degrees and the protrusion length of the blade 23 is at least 8 [mm], the stress of the blade 23 exceeds 300 [MPa]. From FIG. 10, when the inlet angle ⁇ 1 is 41.8 degrees, the protruding length of the blade 23 can be increased to about 7.5 [mm]. In this case, the diameter of the virtual circle formed by connecting the tips of the inner peripheral side end portions 23b of each of the plurality of blades 23 is 87% or less of the diameter of the intake port 20a on the shroud 21 side. Further, the inner peripheral end portion 23b of each of the plurality of blades 23 can be extended to the central side to a position where the hub 22 side is 85% or less of the diameter of the intake port 20a.
  • the diameter of the virtual circle formed by connecting the tips of the inner peripheral side end portions 23b of each of the plurality of blades 23 is such that the hub 22 side is the intake port 20a. It is 85% or less of the diameter.
  • the diameter of the virtual circle is 87% or less of the diameter of the intake port 20a on the shroud 21 side.
  • the angle formed by the circle concentric with the intake port 20a and smaller in diameter than the intake port 20a and the hub side end surface 23d of the blade 23 is larger than the inlet angle ⁇ 1. It's getting bigger.
  • a brushed commutator motor is used as the electric motor 10 used in the electric blower 1, but the present invention is not limited to this.
  • the electric motor 10 may be a brushless motor or the like.
  • the electric blower 1 is used for an electric vacuum cleaner
  • the present invention is not limited to this.
  • the electric blower 1 may be used for other electric devices such as an air towel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
PCT/JP2021/004501 2020-03-26 2021-02-08 電動送風機 Ceased WO2021192656A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2022509358A JPWO2021192656A1 (https=) 2020-03-26 2021-02-08
CN202180021856.5A CN115298443A (zh) 2020-03-26 2021-02-08 电动风机
EP21774400.2A EP4130486A4 (en) 2020-03-26 2021-02-08 ELECTRIC FAN

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020055931 2020-03-26
JP2020-055931 2020-03-26

Publications (1)

Publication Number Publication Date
WO2021192656A1 true WO2021192656A1 (ja) 2021-09-30

Family

ID=77891384

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/004501 Ceased WO2021192656A1 (ja) 2020-03-26 2021-02-08 電動送風機

Country Status (4)

Country Link
EP (1) EP4130486A4 (https=)
JP (1) JPWO2021192656A1 (https=)
CN (1) CN115298443A (https=)
WO (1) WO2021192656A1 (https=)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2757501B2 (ja) 1989-11-09 1998-05-25 松下電器産業株式会社 電動送風機の回転ファン
JP3796974B2 (ja) 1998-07-31 2006-07-12 松下電器産業株式会社 電動送風機
JP2011226398A (ja) * 2010-04-21 2011-11-10 Hitachi Appliances Inc 電動送風機及びそれを搭載した電気掃除機
WO2017154151A1 (ja) * 2016-03-09 2017-09-14 三菱電機株式会社 電動送風機および電気掃除機

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007170771A (ja) * 2005-12-26 2007-07-05 Daikin Ind Ltd ターボファン及びこれを用いた空気調和機の室内ユニット
JP4612084B2 (ja) * 2008-08-29 2011-01-12 株式会社日立産機システム 遠心ファン、及び、それを用いた空気流体機械
CN102762873A (zh) * 2010-02-17 2012-10-31 松下电器产业株式会社 叶轮、使用了叶轮的电动鼓风机及使用了电动鼓风机的吸尘器
JP2011202560A (ja) * 2010-03-25 2011-10-13 Panasonic Corp 電動送風機とそれを用いた電気掃除機
JP6063619B2 (ja) * 2011-09-29 2017-01-18 ミネベア株式会社 遠心式ファン
US10641280B2 (en) * 2015-05-22 2020-05-05 Samsung Electronics Co., Ltd. Turbo fan and air conditioner including same
JP6593538B2 (ja) * 2016-07-27 2019-10-23 株式会社デンソー 遠心送風機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2757501B2 (ja) 1989-11-09 1998-05-25 松下電器産業株式会社 電動送風機の回転ファン
JP3796974B2 (ja) 1998-07-31 2006-07-12 松下電器産業株式会社 電動送風機
JP2011226398A (ja) * 2010-04-21 2011-11-10 Hitachi Appliances Inc 電動送風機及びそれを搭載した電気掃除機
WO2017154151A1 (ja) * 2016-03-09 2017-09-14 三菱電機株式会社 電動送風機および電気掃除機

Also Published As

Publication number Publication date
EP4130486A1 (en) 2023-02-08
CN115298443A (zh) 2022-11-04
JPWO2021192656A1 (https=) 2021-09-30
EP4130486A4 (en) 2023-09-13

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