US 12,402,765 B2
Fan assembly and vacuum cleaner having same
Jinxiao Li, Suzhou (CN); Yuqiang Ma, Suzhou (CN); Wenhu Pan, Suzhou (CN); Dekang Wan, Suzhou (CN); Hang Zhao, Suzhou (CN); Meiquan Wu, Suzhou (CN); Mingqiang Gong, Suzhou (CN); Aibing Sun, Suzhou (CN); and Fuping Cheng, Suzhou (CN)
Assigned to JIANGSU MIDEA CLEANING APPLIANCES CO., LTD., Jiangsu (CN); and MIDEA GROUP CO., LTD., Guangdong (CN)
Filed by JIANGSU MIDEA CLEANING APPLIANCES CO., LTD., Suzhou (CN); and MIDEA GROUP CO., LTD., Guangdong (CN)
Filed on Nov. 29, 2022, as Appl. No. 18/070,963.
Application 18/070,963 is a continuation of application No. PCT/CN2021/134512, filed on Nov. 30, 2021.
Prior Publication US 2023/0165416 A1, Jun. 1, 2023
Int. Cl. A47L 5/22 (2006.01); F04D 17/16 (2006.01); F04D 29/00 (2006.01); F04D 29/046 (2006.01); F04D 29/28 (2006.01); F04D 29/44 (2006.01)
CPC A47L 5/22 (2013.01) [F04D 17/164 (2013.01); F04D 29/002 (2013.01); F04D 29/046 (2013.01); F04D 29/281 (2013.01); F04D 29/44 (2013.01); F04D 29/444 (2013.01); F05D 2240/50 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A fan assembly comprising:
a housing comprising an accommodation cavity with a cross-sectional area that decreases in an airflow flowing direction of the fan assembly;
an impeller assembly at least partially disposed in the housing and comprising a first-level impeller and a second-level impeller connected in series in the airflow flowing direction;
a flow guide member at least partially disposed within the accommodation cavity of the housing, the flow guide member and the accommodation cavity of the housing being configured to guide and discharge output air of the first-level impeller to the second-level impeller, the flow guide member having a cross-sectional area that decreases in the airflow flowing direction; and
a driving member configured to cause the first-level impeller and the second-level impeller to rotate,
wherein:
the accommodation cavity of the housing forms one or more grooves formed axially through the accommodation cavity; and
the flow guide member includes one or more post protrusions configured to interface with respective grooves of the one or more grooves of the accommodation cavity.