Title:
CENTRIFUGAL FAN AND WASHING APPARATUS PROVIDED WITH SAME
Document Type and Number:
WIPO Patent Application WO/2022/143171
Kind Code:
A1
Abstract:
A centrifugal fan (1) and a washing apparatus provided with same. The centrifugal fan (1) comprises: a volute (11), which is provided with a volute axial air-intake side wall (112), the volute axial air-intake side wall (112) being provided with a volute air inlet (111); and an impeller (12), which is configured to be rotatably arranged in the volute (11) and have an impeller axial air-intake side wall (122), wherein there is a first axial gap (14) between the impeller axial air-intake side wall (122) and the volute axial air-intake side wall (112); the impeller axial air-intake side wall (122) is provided with an impeller air inlet (121) which can be aligned with the volute air inlet (111); an outer annular protrusion (132), which extends outwards from the impeller axial air-intake side wall (122), is provided around the impeller air inlet (121), and an inner annular protrusion (131), which extends inwards from the volute axial air-intake side wall (112), is provided around the volute air inlet (111); the outer annular protrusion (132) and the inner annular protrusion (131) are configured to be opposite each other and are spaced apart by a second axial gap (15); and the second axial gap (15) is smaller than the first axial gap (14), so that the outer annular protrusion (132) and the inner annular protrusion (131) together constitute an air inner circulation blocking structure (13). Such a blocking structure can substantially eliminate the phenomenon of air inner circulation and increase the air output.
Inventors:
WANG ZEWANG (CN)
CUI CAN (CN)
ZHOU FANGZHENG (CN)
JIANG WENFENG (CN)
HOU YONGSHUN (CN)
CUI CAN (CN)
ZHOU FANGZHENG (CN)
JIANG WENFENG (CN)
HOU YONGSHUN (CN)
Application Number:
PCT/CN2021/138319
Publication Date:
July 07, 2022
Filing Date:
December 15, 2021
Export Citation:
Assignee:
QINGDAO HAIER DRUM WASHING MACHINE CO LTD (CN)
HAIER SMART HOME CO LTD (CN)
HAIER SMART HOME CO LTD (CN)
International Classes:
F04D25/08; D06F25/00; D06F58/20; F04D29/44
Foreign References:
| CN207621052U | 2018-07-17 | |||
| JP2004011525A | 2004-01-15 | |||
| EP1045177A1 | 2000-10-18 | |||
| CN206017213U | 2017-03-15 | |||
| CN107044434A | 2017-08-15 | |||
| CN108180153A | 2018-06-19 | |||
| CN205937176U | 2017-02-08 | |||
| JP2003083292A | 2003-03-19 | |||
| JPS5928096A | 1984-02-14 |
Attorney, Agent or Firm:
HANRAY LAW FIRM (CN)
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