US 11,898,575 B2
Housing of centrifugal fan, centrifugal fan and clothes dryer
Tao Li, Qingdao (CN); Long Yang, Qingdao (CN); Jindong Bing, Qingdao (CN); Quan Liang, Qingdao (CN); Dongdong Zhu, Qingdao (CN); and Zhenjia Chu, Qingdao (CN)
Assigned to QINGDAO HAIER DRUM WASHING MACHINE CO., LTD., Qingdao (CN); and Haier Smart Home Co., Ltd., Qingdao (CN)
Appl. No. 17/603,113
Filed by QINGDAO HAIER DRUM WASHING MACHINE CO., LTD., Qingdao (CN); and Haier Smart Home Co., Ltd., Qingdao (CN)
PCT Filed Apr. 8, 2020, PCT No. PCT/CN2020/083765
§ 371(c)(1), (2) Date Oct. 12, 2021,
PCT Pub. No. WO2020/207409, PCT Pub. Date Oct. 15, 2020.
Claims priority of application No. 201910295495.8 (CN), filed on Apr. 12, 2019; application No. 201910296045.0 (CN), filed on Apr. 12, 2019; and application No. 201910296046.5 (CN), filed on Apr. 12, 2019.
Prior Publication US 2022/0196033 A1, Jun. 23, 2022
Int. Cl. F04D 29/42 (2006.01); F04D 17/16 (2006.01); F04D 29/44 (2006.01); F04D 29/66 (2006.01); D06F 58/20 (2006.01)
CPC F04D 29/4226 (2013.01) [F04D 17/16 (2013.01); F04D 29/441 (2013.01); F04D 29/667 (2013.01); D06F 58/20 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A housing of a centrifugal fan, comprising:
an air duct of the housing is-provided with a layering structure,
wherein the layering structure is arranged to be able to divide at least a part of the air duct into at least two wind layers, and a width of the wind layer close to a strong wind end is larger than a width of the wind layer close to a weak wind end:
wherein the layering structure is arranged close to an outlet end of the air duct;
wherein the layering structure is a layering platform attached to or formed on an inner wall of the housing, and the layering platform divides the air duct into a first wind layer and a second wind layer, and wherein the first wind layer is close to the strong wind end, and the second wind layer is close to the weak wind end;
wherein a windward end of the layering platform has a smooth transition with the inner wall of the housing; and
wherein a cross-sectional width of the layering platform gradually increases in a direction in which a gas flows from the windward end toward an outlet end of the air duct.