US 11,913,469 B2
Axial flow fan, air conditioner outdoor unit and air conditioner
Wendong Gao, Foshan (CN)
Assigned to GD MIDEA AIR-CONDITIONING EQUIPMENT CO., LTD., Foshan (CN); and MIDEA GROUP CO., LTD., Foshan (CN)
Filed by GD MIDEA AIR-CONDITIONING EQUIPMENT CO., LTD., Foshan (CN); and MIDEA GROUP CO., LTD., Foshan (CN)
Filed on Jan. 18, 2022, as Appl. No. 17/577,705.
Application 17/577,705 is a continuation of application No. PCT/CN2019/101734, filed on Aug. 21, 2019.
Claims priority of application No. 201921166355.2 (CN), filed on Jul. 23, 2019; and application No. 201921169879.7 (CN), filed on Jul. 23, 2019.
Prior Publication US 2022/0136522 A1, May 5, 2022
Int. Cl. F04D 29/32 (2006.01); F04D 19/00 (2006.01); F04D 29/053 (2006.01); F04D 29/26 (2006.01); F04D 29/66 (2006.01)
CPC F04D 29/329 (2013.01) [F04D 19/002 (2013.01); F04D 29/053 (2013.01); F04D 29/263 (2013.01); F04D 29/661 (2013.01); F05D 2260/38 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An axial flow fan comprising:
an axial flow impeller including:
a hub having a shaft hole; and
blades arranged at an outer peripheral wall of the hub;
a motor configured to drive the axial flow impeller to rotate, and including:
a motor body; and
a motor shaft connected to the motor body and engaged in the shaft hole; and
a resistance member arranged at the hub and closer to a free end of the motor shaft than to an end of the motor shaft connecting to the motor body, a stiffness of the resistance member being greater than a stiffness of the hub, an inner peripheral wall of the entire resistance member is spaced apart from an outer peripheral wall of the motor shaft.