| 摘要 |
A propeller fan (1, 201, 301, 401) includes: a boss (3); and a plurality of blades (5) arranged on an outer periphery of the boss (3). A protruding portion (17, 217, 317, 417) is formed on a suction surface (15) of at least one of the blades (5). The protruding portion (17, 217, 317, 417) extends in a rotating direction at a position separated away from an outer peripheral edge of the blade. An inclination of a radially-inner skirt portion (17a) of the protruding portion (17, 217, 317, 417) is gentler than an inclination of a radially-outer skirt portion (17b) of the protruding portion (17, 217, 317, 417). A blowing flow is uniformized in a radial direction, thereby being capable of suppressing a locally-high velocity air stream. |
