公开(公告)号：US20220003242A1

公开(公告)日：2022-01-06

申请号：US17293194

申请日：2019-04-26

申请人： GD MIDEA AIR-CONDITIONING EQUIPMENT CO., LTD. ,  MIDEA GROUP CO., LTD.

发明人： Yutai HUANG ,  Xujie CAI ,  Yushi LI ,  Bo WANG ,  Hejie ZHOU

IPC分类号： F04D29/38 ,  F04D19/00 ,  F04D29/32 ,  F04D29/26

摘要： An axial-flow impeller includes a hub and blades. A tail edge of one blade has recessed portions successively arranged in a direction from a blade root of the blade to an outer edge of the blade. On a reference projection of the impeller on a reference plane perpendicular to a rotation axis of the impeller, a first connection line connects a starting point of a first recessed portion closest to the blade root and an end point of a second recessed portion closest to the outer edge, a second connection line connects a tail edge point of the blade root and the end point of the second recessed portion, one or more of the recessed portions is each partially located at a front-edge side of the second connection line, and remaining one or more of the recessed portions is each completely located between the first and second connection lines.