WO2023108921A1 - Ventilateur et dispositif de nettoyage le comprenant - Google Patents

Ventilateur et dispositif de nettoyage le comprenant Download PDF

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Publication number
WO2023108921A1
WO2023108921A1 PCT/CN2022/079376 CN2022079376W WO2023108921A1 WO 2023108921 A1 WO2023108921 A1 WO 2023108921A1 CN 2022079376 W CN2022079376 W CN 2022079376W WO 2023108921 A1 WO2023108921 A1 WO 2023108921A1
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WO
WIPO (PCT)
Prior art keywords
fan
diffuser
blade
blades
channel
Prior art date
Application number
PCT/CN2022/079376
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English (en)
Chinese (zh)
Inventor
丁荣
Original Assignee
广东威灵电机制造有限公司
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
Priority claimed from CN202123197264.5U external-priority patent/CN216617951U/zh
Priority claimed from CN202111547204.3A external-priority patent/CN114215776A/zh
Application filed by 广东威灵电机制造有限公司 filed Critical 广东威灵电机制造有限公司
Publication of WO2023108921A1 publication Critical patent/WO2023108921A1/fr

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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
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps

Definitions

  • the present disclosure relates to the technical field of fans, in particular to a fan and its cleaning equipment.
  • the present disclosure aims at at least partially solving one of the technical problems existing in the prior art. For this reason, the present disclosure proposes a fan and its cleaning equipment, which can reduce the noise of the fan and reduce the impact of noise caused by the increase of the rotating speed.
  • the fan according to the first aspect of the present disclosure includes: a casing assembly; a wind cover installed on the casing assembly, and the wind cover cooperates with the casing assembly to form an accommodation chamber; a wind wheel is arranged on the casing assembly.
  • the wind wheel cooperates with the side wall of the accommodating cavity to define an air intake channel;
  • the first diffuser is arranged in the accommodating cavity, including a first fan blade and a mounting hub, and the The installation hub, the first blade, and the side wall of the accommodation chamber cooperate to define a first diffusion channel, the air intake channel communicates with the first diffusion channel in turn, and the outer edge of the installation hub is arranged
  • the fan according to the embodiment of the first aspect of the present disclosure has at least the following beneficial effects: when the wind rotor rotates, the air enters the air intake passage, and along the axial direction of the installation hub, by setting the second end closer to the air intake than the first end Channel, so that when the airflow transitions from the intake channel to the first diffuser channel, the airflow contacts the first fan blade earlier, and the airflow enters the first diffuser channel more smoothly, reducing the diffusion and impact loss of the airflow, and reducing the aerodynamic force noise.
  • connection line between the first end and the second end is defined as a first connection line
  • clamp between the first connection line and the radial line of the installation hub Angle a said a satisfies: 25° ⁇ a ⁇ 70°.
  • the wind wheel includes second wind blades, and the width of the second wind blades decreases gradually along the axial direction of the wind wheel.
  • the ratio of the maximum width of the second blade to the minimum width of the second blade is x, which satisfies: 1.3 ⁇ x ⁇ 2.1.
  • the second vane is in clearance fit with the inner wall of the wind shield, the distance between the second vane and the inner wall of the wind shield is d, and the d satisfies: 0.12 ⁇ d ⁇ 0.5mm.
  • the number of the second blades is z2, and the number of the first blades is z1, satisfying: z2 ⁇ z1, and 7 ⁇ z2 ⁇ 9.
  • the casing assembly is further provided with a second diffuser
  • the second diffuser includes an inner cylinder, an outer cylinder and a third blade
  • the inner cylinder and The mounting hubs are butted together
  • the third fan blades are circumferentially distributed on the outer periphery of the inner cylinder
  • a second expansion blade is defined between the inner cylinder, the outer cylinder and the third fan blades.
  • the distance between the tail end of the third fan blade and the tail end of the inner cylinder is H1
  • the tail end of the third fan blade is H2, which satisfies: H2>H1.
  • the number of the third blades is z3, the number of the first blades is z1, and z3>z1 is satisfied.
  • the axial length of the intake passage is h1
  • the axial length of the first diffuser passage is h2
  • the second The axial length of the diffuser channel is h3, which satisfies: h1 ⁇ h2 ⁇ h3.
  • the cleaning device according to the embodiment of the second aspect of the present disclosure includes the fan according to the embodiment of the first aspect of the present disclosure.
  • the cleaning device has at least the following beneficial effects: when the wind wheel rotates, the air enters the air intake channel along the air intake end of the wind cover, and the air flow transitions from the air intake channel to the first diffuser When passing through the first fan blade, the air flow enters the first diffuser channel more smoothly, reducing the diffusion and impact loss of the air flow, and reducing aerodynamic noise.
  • FIG. 1 is a schematic diagram of a fan according to an embodiment of the first aspect of the present disclosure
  • Fig. 2 is the partially enlarged schematic diagram of place A in Fig. 1;
  • Fig. 3 is a schematic diagram of the gas flow direction of the fan according to the embodiment of the first aspect of the present disclosure
  • Fig. 4 is a schematic diagram of a first diffuser in a fan according to an embodiment of the first aspect of the present disclosure
  • Fig. 5 is a cross-sectional view of the first diffuser in the fan according to the embodiment of the first aspect of the present disclosure
  • Fig. 6 is a schematic diagram of a wind wheel in a fan according to an embodiment of the first aspect of the present disclosure
  • Fig. 7 is a schematic diagram of the coordination of the wind wheel and the wind shield in the fan according to the embodiment of the first aspect of the present disclosure
  • Fig. 8 is a partially enlarged schematic diagram of place B in Fig. 7;
  • Fig. 9 is a schematic diagram of the bottom view angle of the second diffuser in the blower according to the embodiment of the first aspect of the present disclosure.
  • Intake channel 101 first diffuser channel 102, second diffuser channel 103, transition channel 104;
  • orientation descriptions such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the drawings, and only In order to facilitate the description of the present disclosure and simplify the description, it does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the present disclosure.
  • the fan according to the embodiment of the first aspect of the present disclosure includes: a casing assembly; a windshield 200 installed on the casing assembly, and the windshield 200 cooperates with the casing assembly to form an accommodation cavity
  • the wind wheel 300 is rotatably installed in the chamber, and the wind wheel 300 cooperates with the side wall of the chamber to define an air intake channel, and the air is continuously introduced into the air intake channel through the rotation of the wind wheel 300, and along the The air intake channel flows out;
  • the first diffuser 400 is arranged in the accommodation chamber, and includes a first fan blade 410 and an installation hub 420, the first fan blade 410 is arranged on the outer peripheral surface of the installation hub 420, and the installation hub 420 and the accommodation chamber
  • the side walls cooperate to define the first diffuser channel 102, the intake channel 101 and the first diffuser channel 102 are sequentially connected, a plurality of first fan blades 410 are arranged at intervals on the outer peripheral surface of the mounting hub 420, and flow along the air
  • the first fan blade 410 has a front edge 411 and a rear edge 412, and the end connecting the front edge 411 of the first fan blade 410 to the mounting hub 420 is set as the first end, and the front edge of the first fan blade 410
  • the end of 411 away from the installation hub 420 is the second end, along the axial direction of the installation hub 420, the second end is closer to the air inlet channel than the first end, and the line between the first end and the second end is defined as the first connection line.
  • the included angle between the first connecting line and the radial line of the installation hub 420 is the included angle a of the first blade 410 , which satisfies: 25° ⁇ a ⁇ 70°.
  • the air intake channel 101 under the guidance of the wind wheel 300, and the front edge 411 of the first wind blade 410 is inclined upward, that is, along the axial direction of the installation hub 420, the second The two ends are closer to the air outlet of the air intake passage than the first, so that the front edge 411 of the first fan blade 410 is closer to the air outlet end of the air intake passage 101, and the airflow transitions from the air intake passage 101 to the first diffuser passage 102
  • the airflow is blown out from the air outlet end of the air intake channel 101, it contacts the first blade 410 faster and is supported by the first blade 410, reducing the diffusion of the airflow and making the airflow follow the first blade 410 It smoothly flows into the first diffuser channel 102 , reduces the impact loss of the air flow, reduces the aerodynamic noise, and improves the efficiency of the fan at the same time.
  • the air flow formed by rotating the wind wheel 300 can be more fully converted into static pressure energy, thereby improving the overall efficiency of the electric fan.
  • first fan blades 410 there are a plurality of first fan blades 410 arranged along the outer circumference of the first diffuser 400 , and the first fan blades 410 can control the airflow from the intake passage 101 .
  • Pressurization increases the pressure of the airflow, converts the kinetic energy into static pressure energy, and fully converts the kinetic energy of the airflow into the pressure energy of the gas, reducing the kinetic energy loss caused by the impact of the gas, thereby increasing the efficiency of the electric fan.
  • the end of the first vane 410 close to the outer peripheral surface of the installation hub 420 is the root of the first vane 410 , that is, the first root 413
  • the first vane 410 is the first root 413
  • the end of the blade 410 away from the outer peripheral surface of the mounting hub 420 is the outer edge of the first blade 410 , that is, the first outer edge 414 .
  • the thickness of the first vane 410 gradually decreases from the first root 413 to the first outer edge 414 .
  • the cross-sectional area of the airflow channel at the root region of the first fan blade 410 can be reduced, thereby reducing flow separation of the airflow at the root region of the first fan blade 410 .
  • the airflow in the area of the first root 413 is small, and the airflow in the area of the first outer edge 414 is large.
  • the thickness from the first root 413 to the first outer edge 414 of the first vane 410 gradually decreases, which can appropriately increase the flow area of the airflow in the direction away from the first diffuser 400, thereby reducing the flow loss of the airflow .
  • the first vane 410 extends downward along the circumference of the first diffuser 400 , and the first vane 410 is drawn from the first diffuser passage 102 The end extends to the air outlet end of the first diffuser channel 102 to enhance the flow guiding effect of the first fan blade 410, so that the air flow can flow along the first fan blade 410 in the first diffuser channel 102, and at the same time extend the air flow at the second A stroke in the diffuser channel 102 makes the airflow always be guided by the first vane 410 during the flow, which reduces the turbulence of the airflow, reduces the aerodynamic noise, and improves the efficiency of the first diffuser channel 102 .
  • the wind wheel 300 includes a hub 320 , a bottom plate 330 and a plurality of second blades 310 .
  • the hub 320 is approximately cylindrical, and a connecting portion 340 is provided along the axial direction of the hub 320.
  • the connecting portion 340 is used to connect with the output shaft of the driving device of the electric fan.
  • the driving device drives the wind wheel 300 to rotate through the rotation of the output shaft.
  • the diameter of the outer peripheral surface gradually increases from one end to the other end.
  • the outer peripheral surface of the bottom plate 330 gradually narrows from the back to the front, and is roughly conical. end, the wider end of the outer peripheral surface is the air outlet end.
  • the plurality of second fan blades 310 are uniformly arranged on the outer peripheral surface, that is, the plurality of second fan blades 310 are arranged at equal intervals along a circle of the outer peripheral surface. Since the outer peripheral surface is on a cone with a narrow front and a wide rear, and the second fan blade 310 is arranged on the outer peripheral surface, the front end of the second fan blade 310 is relatively close to the central axis of the hub 320, and the front end of the second fan blade 310 is a leading edge.
  • the front edge of the second blade 310 is relatively far away from the central axis of the hub 320, the rear end of the second blade 310 is the rear edge, and the rear edge of the second blade 310 is twisted toward the rotation direction of the wind wheel 300, The rear end of the second blade 310 twists away from the rotation direction of the wind wheel 300 .
  • the wind wheel 300 is a plastic part, while the existing wind wheel 300 is usually made of metal, and the cost of the metal wind wheel 300 is relatively high, and the use of the plastic wind wheel 300 can effectively reduce the production cost.
  • the wind wheel 300 can be made of plastic, so its structure needs to be adapted to the demoulding process in the injection molding process.
  • the front edge and the rear edge of the second blade are twisted in opposite directions, and the parting surface is located at the second blade.
  • the middle section is perpendicular to the central axis of the hub 320 , so that the front half and the rear half of the wind wheel 300 are respectively rotated in opposite directions for demoulding.
  • the twisted structure at the front and rear ends of the second fan blade enables smooth demoulding, and can effectively reduce the fluid loss of the wind wheel 300 and improve the working performance of the wind wheel 300 .
  • the hub 320, the bottom plate 330, and the second blade are integrally formed by injection molding, which not only ensures the structure and performance stability of the wind wheel 300, but also facilitates molding and simple manufacturing, greatly improves the assembly efficiency of the wind wheel 300, and ensures that the wind wheel 300 Furthermore, the overall strength and stability of the one-piece structure are higher, the assembly is more convenient, and the service life is longer.
  • the side wall of the first diffuser 400 is provided with an arc surface 401 at one end facing the wind wheel 300 , and the arc surface 401 is located outside the side wall of the first diffuser 400 , and The arc surface 401 is arranged between the first fan blade 410 and the air intake passage 101, and the arc surface 401 and the side wall of the housing chamber define the transition passage 104. After the air flow comes out of the air intake passage 101, it enters the transition passage 104 and passes through the The arc surface 401 is in contact, so that the air flow passes through the transition channel 104 smoothly, reducing the aerodynamic noise.
  • the width of the second blade 310 gradually decreases along the flow direction of the airflow in the air duct.
  • the width of the second fan blade 310 at the air inlet end of the air intake passage is the largest, so that when the wind wheel 300 rotates, the contact area between the second fan blade 310 and the air is increased, making it easier for the second fan blade 310 to introduce air into the intake air.
  • the gas In the channel, when the gas enters the air intake channel, the gas has a certain kinetic energy, and the gas moves along the second fan blade 310, and the gas flows in the air intake channel toward the air outlet end, and the flow speed of the gas is determined by the inlet channel of the air intake channel.
  • the air end gradually speeds up toward the air outlet end of the air intake passage, and the width of the second fan blade 310 gradually decreases toward the air outlet end of the air intake passage, which reduces the resistance when the airflow leaves the air intake passage, reduces the loss of air kinetic energy, and improves the efficiency of the air intake passage .
  • the width of the second fan blade 310 gradually decreases along the flow direction of the airflow, so that when the airflow flows in the air intake passage, the friction and collision between the airflow and the second fan blade 310 are reduced, and the aerodynamic noise generated when the gas flows is reduced. Improve user experience.
  • the ratio of the maximum width of the second blade 310 to the minimum width of the second blade 310 ranges from 1.3 to 2.1, for example, the ratio of the maximum width of the second blade 310 to the minimum width of the second blade 310 may be 1.3 . Noise, improve the performance of the intake passage.
  • the second fan blade 310 is in clearance fit with the inner wall of the windshield 200 , and the distance between the second fan blade 310 and the inner wall of the windshield 200 is d, and d satisfies: 0.12 ⁇ d ⁇ 0.5mm, so that while ensuring that there will be no contact between the second fan blade 310 and the inner wall of the wind shield 200, the gap between the second fan blade 310 and the inner wall of the wind shield 200 is reduced, and the flow away from the gap is reduced. The air volume is increased, and the efficiency of the wind wheel 300 is improved.
  • the number of the first fan blades 410 is greater than the number of the second fan blades 310, the multiple airflows entering the first diffuser channel 102 are further Dividing into more airflows is beneficial to reduce the pulsation of the airflow and reduce the noise.
  • the casing assembly is further provided with a second diffuser 500
  • the second diffuser 500 includes a third vane 410, an inner cylinder 530 and an outer cylinder 520, and the inner cylinder 530 Docking with the first diffuser 400, use interference fit between the inner cylinder 530 and the installation hub 420 to achieve preliminary positioning between the two, and then install the hub 420 and the inner cylinder 530 through screw light fasteners
  • the fixed connection realizes the assembly of the first diffuser 400 and the second diffuser 500 .
  • first abutting portion 521 is an extension of the inner side of the side wall of the outer cylinder 520 , along the axial direction of the outer cylinder 520 ,
  • the axial length of the first abutting portion 521 is smaller than the axial length of the side wall body of the outer cylinder 520, that is, the thickness of the first abutting portion 521 is smaller than the thickness of the side wall body of the outer cylinder 520, so that the outer cylinder 520
  • a first positioning step 522 is formed on the outer side of the windshield 200, and the windshield 200 is roughly in the shape of a circular platform.
  • first abutting part 521 By extending the first abutting part 521 into the windshield 200 and making the first abutting part 521 interfere with the inner wall of the windshield 200, It is easy to disassemble and install between the windshield 200 and the outer cylinder 520. In addition, when the first abutting part 521 extends into the inside of the windshield 200, until the side wall of the windshield 200 abuts against the first positioning step 522, then At this time, the positioning of the windshield 200 on the outer cylinder 520 is completed, which is convenient and quick.
  • the second diffuser passage 103 is defined between the third fan blade 510, the inner cylinder 530 and the outer cylinder 520, and the intake passage, the first diffuser passage 102 and the second diffuser
  • the channels 103 are connected sequentially, and the outer side of the inner cylinder 530 is provided with a plurality of third fan blades 510.
  • the first fan blades, the third fan blades and the wind wheel 300 form at least a two-stage diffuser structure, which can pressurize the air flow and simultaneously It can reduce the overall sound power of the fan and the peak value of the blade frequency to reduce the noise of the fan and promote the development of the fan in the direction of miniaturization and high power.
  • both ends of the third blade are respectively connected to the outer wall of the inner cylinder 530 and the inner wall of the outer cylinder 520 .
  • the third fan blade 510 can provide support for the inner barrel 530 and the installation hub 420, thereby simplifying the installation structure of the electric fan, improving the integration of the electric fan, and facilitating the miniaturization of the electric fan.
  • a plurality of third vanes 510 are evenly distributed along the circumference of the inner cylinder 530 , making the second diffuser 500 overall beautiful, and at the same time facilitating the flow of air in the second diffuser passage 103 . Uniform flow increases the efficiency of the second diffuser 500 .
  • the axial distance between the tail end of the third fan blade 510 and the tail end of the inner cylinder 530 is H1
  • the tail end of the third fan blade 510 and the outer cylinder body The axial distance of the tail end of 520 is H2, and H2>H1, so that after the air flow flows out from the rear edge of the third blade 510, it will not directly diffuse to the outside, and at the same time, a transition is formed at the tail end of the second diffuser channel 103 Section, the transition section accepts the airflow flowing out from the outlet end of the second diffuser channel 103, and guides it into the atmosphere outside the side wall of the second diffuser 500, so as to play the role of deceleration and diffusion.
  • the transition section is lengthened The diffusion stroke of the gas flow at the gas outlet end of the second diffuser channel 103 reduces the diffusion loss of the gas flow at the gas outlet end of the second diffuser channel 103 , thereby reducing the aerodynamic
  • the number z1 of the first blades and the number z3 of the third blades, and z3>z1, that is, the number of the third blades 510 is greater than the number of the first blades 410 .
  • the air flow flowing out from the outlet end of the first diffuser channel 102 can be divided into multiple streams, which is beneficial to reduce air flow pulsation and noise, and at the same time can The airflow in the second diffuser channel 103 is further decelerated and diffused.
  • the axial length of the intake passage is h1
  • the axial length of the first diffuser passage 102 is h2
  • the axial length of the second diffuser passage 103 is The axial length is h3, satisfying: h1 ⁇ h2 ⁇ h3, the axial structure of the fan is more compact, and at the same time, the output efficiency of the fan is improved, and the gas flow efficiency is improved.
  • the second diffuser 500 protrudes along the axial direction and is provided with a plurality of bosses 540 , and the plurality of bosses 540 cooperate to position the PCB board. By passing the screw through the positioning hole on the PCB and threading it with the boss 540, the PCB is fixedly installed in the casing assembly.
  • the cleaning equipment according to the embodiment of the second aspect of the present disclosure includes the fan according to the embodiment of the first aspect of the present disclosure.
  • the air enters into the intake passage along the direction, and when the airflow transitions from the intake passage 101 to the first diffuser passage 102, after passing through the first fan blade 410, the airflow enters the first diffuser passage more smoothly.
  • the diffuser channel 102 reduces the diffusion and impact loss of the airflow, and reduces the aerodynamic noise.
  • the cleaning equipment may be a hand-held vacuum cleaner, a bucket vacuum cleaner, or a sweeping robot, or other cleaning equipment.
  • the hand-held vacuum cleaner requires the electric fan to be small in size and high in power to meet the cleaning needs. While the motor maintains high power, it can effectively reduce noise and reduce the noise generated by the cleaning equipment. Trouble, improve user experience.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

La présente invention concerne un ventilateur comprenant : un ensemble logement ; un couvercle de ventilateur (200), qui est monté sur l'ensemble logement et s'adapte à l'ensemble logement pour former une cavité de réception ; une roue éolienne (300) disposée dans la cavité de réception et s'ajustant à une paroi latérale de la cavité de réception pour former un canal d'entrée d'air (101) ; un premier diffuseur (400) disposé dans la cavité de réception et comprenant des premières pales de ventilateur (410) et un moyeu de montage, le moyeu de montage, les premières pales de ventilateur (410) et la paroi latérale de la cavité de réception délimitant ensemble un premier canal de diffusion (102) ; le canal d'entrée d'air (101) étant en communication avec le premier canal de diffusion (102) en série ; de multiples premières pales de ventilateur (410) sont disposées sur un bord externe du moyeu de montage, l'extrémité d'un bord avant (411) d'une première pale de ventilateur (410) raccordée au moyeu de montage étant une première extrémité, l'extrémité du bord avant (411) de la première pale de ventilateur (410) distante du moyeu de montage étant une seconde extrémité, et la seconde extrémité étant plus proche du canal d'entrée d'air (101) que la première extrémité. Ceci peut réduire le bruit de ventilateur, et réduire l'effet sur le bruit provoqué par une augmentation de la vitesse de rotation. La présente invention concerne en outre un dispositif de nettoyage.
PCT/CN2022/079376 2021-12-16 2022-03-04 Ventilateur et dispositif de nettoyage le comprenant WO2023108921A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202111547204.3 2021-12-16
CN202123197264.5U CN216617951U (zh) 2021-12-16 2021-12-16 风机及其清洁设备
CN202123197264.5 2021-12-16
CN202111547204.3A CN114215776A (zh) 2021-12-16 2021-12-16 风机及其清洁设备

Publications (1)

Publication Number Publication Date
WO2023108921A1 true WO2023108921A1 (fr) 2023-06-22

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Application Number Title Priority Date Filing Date
PCT/CN2022/079376 WO2023108921A1 (fr) 2021-12-16 2022-03-04 Ventilateur et dispositif de nettoyage le comprenant

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WO (1) WO2023108921A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69127832D1 (de) * 1990-07-20 1997-11-06 Hitachi Ltd Staubsauger mit Gebläserad und Diffusor
KR20030026485A (ko) * 2001-09-26 2003-04-03 엘지전자 주식회사 청소기 모터 방열구조
CN1437300A (zh) * 2002-02-07 2003-08-20 德昌电机股份有限公司 鼓风机马达
CN212536246U (zh) * 2020-09-14 2021-02-12 北京石头世纪科技股份有限公司 风机及清洁设备
CN113027794A (zh) * 2021-04-27 2021-06-25 广东威灵电机制造有限公司 风机及清洁设备
CN113775544A (zh) * 2021-09-06 2021-12-10 广东威灵电机制造有限公司 一种电风机及清洁设备

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69127832D1 (de) * 1990-07-20 1997-11-06 Hitachi Ltd Staubsauger mit Gebläserad und Diffusor
KR20030026485A (ko) * 2001-09-26 2003-04-03 엘지전자 주식회사 청소기 모터 방열구조
CN1437300A (zh) * 2002-02-07 2003-08-20 德昌电机股份有限公司 鼓风机马达
CN212536246U (zh) * 2020-09-14 2021-02-12 北京石头世纪科技股份有限公司 风机及清洁设备
CN113027794A (zh) * 2021-04-27 2021-06-25 广东威灵电机制造有限公司 风机及清洁设备
CN113775544A (zh) * 2021-09-06 2021-12-10 广东威灵电机制造有限公司 一种电风机及清洁设备

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