US 12,404,872 B1
Fan structure
Kuo-Tung Hsu, Taoyuan (TW); Wen-Chun Hsu, Taoyuan (TW); Chao-Fu Yang, Taoyuan (TW); Cheng-Yuan Lee, Taoyuan (TW); and Min-Sen Hung, Taoyuan (TW)
Assigned to DELTA ELECTRONICS, INC., Taoyuan (TW)
Filed by DELTA ELECTRONICS, INC., Taoyuan (TW)
Filed on Oct. 17, 2024, as Appl. No. 18/918,102.
Claims priority of application No. 202421723884.9 (CN), filed on Jul. 19, 2024.
Int. Cl. F04D 29/44 (2006.01); F04D 25/08 (2006.01); F04D 29/02 (2006.01); F04D 29/40 (2006.01); F04D 29/42 (2006.01)
CPC F04D 29/441 (2013.01) [F04D 25/08 (2013.01); F04D 29/023 (2013.01); F04D 29/403 (2013.01); F04D 29/4226 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A fan structure comprising:
a fan impeller;
a motor having a rotation shaft connected to the fan impeller; and
a fan frame enclosing the motor and the fan impeller to form a flow passage, wherein the fan frame has a bottom wall and a side wall, the side wall includes a first relatively hard portion and a first relatively soft portion, wherein the first relatively hard portion has a hardness greater than that of the first relatively soft portion, and the first relatively soft portion serves as a part of a wall surface of the flow passage.