Patent ID: 11920609
Assignee: DAIKIN INDUSTRIES, LTD.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. An axial fan rotating around a rotating shaft, the axial fan comprising:
a hub; and
a plurality of blades extending in a radial direction from the huh, each of the blades including
a leading edge located forward of a rotation direction,
a trailing edge located rearward, the trailing edge including a depression depressed forward in the rotation direction, and
a reinforcing protrusion located at least forwardmost in the rotation direction of the depression and having a wall thickness thicker than a surrounding portion,
as viewed along a rotating shaft direction, when a first virtual line and a second virtual line perpendicular to the radial direction are drawn, the reinforcing protrusion extends radially inside of the first virtual line and extends radially outside of the second virtual line, the first virtual line and the second virtual line respectively passing through
a rearmost first endpoint in the rotation direction on a radially, inside of a rear end that substantially overlaps the depression, and
a rearmost second endpoint on a radially outside of the rear end.