US 12,410,811 B2
Cross-flow fan and air conditioner
Meiling Huang, Zhuhai (CN); Jianhuang Zou, Zhuhai (CN); Fuqi Chen, Zhuhai (CN); and Haohao He, Zhuhai (CN)
Assigned to GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI, Zhuhai (CN)
Filed by GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI, Zhuhai (CN)
Filed on Sep. 4, 2024, as Appl. No. 18/824,620.
Application 18/824,620 is a continuation of application No. PCT/CN2023/087840, filed on Apr. 12, 2023.
Claims priority of application No. 202210736124.0 (CN), filed on Jun. 27, 2022.
Prior Publication US 2024/0426314 A1, Dec. 26, 2024
Int. Cl. F04D 29/30 (2006.01); F04D 29/66 (2006.01); F24F 1/0025 (2019.01)
CPC F04D 29/30 (2013.01) [F04D 29/666 (2013.01); F24F 1/0025 (2013.01); F05B 2240/301 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A cross-flow fan, comprising a plurality of blades, wherein the plurality of blades are arranged and spaced apart around a rotation axis of the cross-flow fan; each blade has a blade centerline; and in a cross-section of each blade, the blade centerline is an arc, and a thickness of each blade continuously increases first and then continuously decreases from a middle position of the blade centerline toward two end positions thereof;
wherein each blade has an outer end and an inner end; a minimum thickness of each blade at the middle position is dmin; a first portion of each blade between the middle position and the outer end has a first maximum thickness dmax1; a second portion of each blade between the middle position and the inner end has a second maximum thickness dmax2; and it is satisfied that dmin<dmax2<dmax1.