| 摘要 |
PROBLEM TO BE SOLVED: To provide a propeller fan capable of reducing blade passage sound while maintaining efficiency of the fan.SOLUTION: A propeller fan 1 includes a hub 2 having a shape allowed to be coupled to a rotary drive shaft of a motor and two blades 3 arranged on a periphery of the hub 2. An outlet angle &bgr;2 to be an inclination angle of a rear end part of the blade 3 from a rotational direction of the blade 3 is set so that the outlet angle &bgr;2 becomes a maximum value in a predetermined range directed from a position of a center between a hub side end part 3c of the blade 3 up to a blade end part 3d to be an outer peripheral side end part of the blade 3 to a hub side end part 3c of the blade 3 and gradually reduces from the position taking the maximum value to the blade end part 3d. |
