US 12,104,604 B2
Axial fan
Yoshihisa Yamazaki, Tokyo (JP)
Assigned to SANYO DENKI CO., LTD., Tokyo (JP)
Filed by SANYO DENKI CO., LTD., Tokyo (JP)
Filed on Sep. 28, 2023, as Appl. No. 18/476,412.
Claims priority of application No. 2022-157842 (JP), filed on Sep. 30, 2022.
Prior Publication US 2024/0110572 A1, Apr. 4, 2024
Int. Cl. F04D 19/00 (2006.01); F04D 29/38 (2006.01)
CPC F04D 19/002 (2013.01) [F04D 29/384 (2013.01)] 3 Claims
OG exemplary drawing
 
1. An axial fan comprising a plurality of blades configured to produce an air current flowing from an inlet side to an outlet side, wherein
each blade includes a curved portion rising toward the inlet side along an outer peripheral edge of each blade,
a starting position of the curved portion delineates a convex curve protruding radially outward on each blade as viewed from the inlet side, and
letting a total length of the convex curve be X, a length Y from an end of the convex curve on a front edge of each blade to a vertex of the convex curve satisfies a relationship of 0<Y≤0.6X as viewed from the inlet side.