Title:
CENTRIFUGAL FAN AND CLOTHING DRYER
Document Type and Number:
WIPO Patent Application WO/2020/233471
Kind Code:
A1
Abstract:
A centrifugal fan and a clothing dryer. The centrifugal fan comprises a housing (1) as well as an impeller (2) and a worm tongue (3) disposed in the housing (1). The housing (1) is provided with an air inlet (4) and an air outlet (5). The volute tongue (3) comprises a first volute tongue (31) and a second volute tongue (32) that are stacked and staggered. The first volute tongue (31) is configured to cut the air blown from the impeller (2) and guide the air to the air outlet (5) when the impeller (2) rotates forward. The second volute tongue (32) is configured to cut the air blown from the impeller (2) and guide the air to the air outlet (5) when the impeller (2) rotates backward. When the impeller (2) rotates forward or backward, the first volute tongue (31) or the second volute tongue (32) can cut the air blown from the impeller (2) and guide the air to the air outlet (5), so that the centrifugal fan can blow out a large amount of air when the impeller (2) rotates forward and backward.
Inventors:
LV PEISHI (CN)
LI TAO (CN)
BING JINDONG (CN)
CHENG RONGFENG (CN)
YANG LONG (CN)
LI TAO (CN)
BING JINDONG (CN)
CHENG RONGFENG (CN)
YANG LONG (CN)
Application Number:
PCT/CN2020/090029
Publication Date:
November 26, 2020
Filing Date:
May 13, 2020
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:
D06F58/20; F04D17/16; F04D25/16; F04D29/28; F04D29/30; F04D29/42; F04D29/44
Foreign References:
| CN210343751U | 2020-04-17 | |||
| CN208533192U | 2019-02-22 | |||
| JPS57206799A | 1982-12-18 | |||
| CN202520657U | 2012-11-07 | |||
| CN102758795A | 2012-10-31 | |||
| CN106089805A | 2016-11-09 | |||
| CN104196761A | 2014-12-10 | |||
| JP2011252477A | 2011-12-15 |
Other References:
See also references of EP 3974653A4
Attorney, Agent or Firm:
HANRAY LAW FIRM (CN)
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