Axial fan for heat exchanger of in-vehicle air conditioner

摘要

There is provided a propeller fan (1) in which a clearance between a rotary vane wheel (3) and a shroud (2) is constant three-dimensionally to improve air blowing efficiency and suppress noise. Furthermore, there is provided a propeller fan (1) in which a span length of the rotary vane wheel (3) with respect to the shroud (2) is varied between a front edge portion and a rear edge portion to improve air blowing efficiency and suppress noise.
Still further, there is provided a propeller fan (1) characterized in that a chamfering (12) is applied only to a negative pressure face of a circumferential outer edge portion of a vane (8).