US 11,988,225 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 Jun. 29, 2023, as Appl. No. 18/344,466.
Claims priority of application No. 2022-117872 (JP), filed on Jul. 25, 2022.
Prior Publication US 2024/0026898 A1, Jan. 25, 2024
Int. Cl. F04D 19/00 (2006.01); F04D 29/38 (2006.01)
CPC F04D 29/386 (2013.01) [F04D 19/002 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An axial fan comprising:
multiple forward-swept blades, wherein
an angle of advance of a trailing edge of the forward-swept blade is larger than an angle of advance of a leading edge of the forward-swept blade, and
an outer portion of the trailing edge, being positioned further in an outer periphery of the trailing edge than an intermediate portion of the trailing edge with respect to a rotary shaft of the axial fan, advances as the trailing edge advances radially outward of a ventilation channel of the axial fan.