Title:
FAN AND CLEANING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/052552
Kind Code:
A1
Abstract:
A fan and a cleaning device. The fan comprises: a motor stator (5); an axial diffuser (3), which is fixedly connected to the motor stator (5) and comprises an outer cylinder (31), a main body portion (32) that is disposed in the outer cylinder (31), and a diffuser blade (33) that is connected to the outer cylinder (31) and the main body portion (32), the diffuser blade (33) separating an annular space between the outer cylinder (31) and the main body portion (32) into a plurality of pressure diffusion ducts (34), and the main body portion (32) being provided with a central shaft hole (35); an air inlet cover (2), which is fixedly connected to the axial diffuser (3), the air inlet cover (2) and the axial diffuser (3) forming an impeller chamber (9) and an annular no-gate channel (8) around the impeller chamber (9), the annular no-gate channel (8) communicating with the impeller chamber (9) and the pressure diffusion ducts (34), and the air inlet cover (2) being provided with an air inlet (21); and an impeller (1), which is disposed in the impeller chamber (9) and is used to introduce air from the air inlet (21), which enters the pressure diffusion ducts (34) by means of the annular no-gate channel (8) under the drive of the impeller (1), and exits from the other end of the pressure diffusion ducts (34). The described fan can effectively improve the working efficiency and reduce noise.
Inventors:
LI CHANGCHENG (CN)
LI XING (CN)
LI XING (CN)
Application Number:
PCT/CN2021/100730
Publication Date:
March 17, 2022
Filing Date:
June 17, 2021
Export Citation:
Assignee:
BEIJING ROBOROCK TECH CO LTD (CN)
International Classes:
F04D25/08
Foreign References:
| CN212536246U | 2021-02-12 | |||
| CN212536158U | 2021-02-12 | |||
| CN212543466U | 2021-02-12 | |||
| CN210290212U | 2020-04-10 | |||
| CN109185196A | 2019-01-11 | |||
| CN110617230A | 2019-12-27 | |||
| CN206221314U | 2017-06-06 | |||
| CN211397958U | 2020-09-01 | |||
| CN111441969A | 2020-07-24 | |||
| JP2001513861A | 2001-09-04 |
Attorney, Agent or Firm:
BEIJING INTELLEGAL INTELLECTUAL PROPERTY AGENT LTD. (CN)
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