| 摘要 |
PURPOSE: A propeller fan is provided to prevent a counter flow of air blown by main blades by forming an axial air current by auxiliary blades formed on a hub and obtain relatively uniform flow of the air current even though the air current is biased radially by the main blades, thereby improving the blowing efficiency. CONSTITUTION: A propeller fan(40) is formed with a predetermined curvature and includes a plurality of main blades(50) to be pressed by air by rotation of the fan and a hub(42) for connecting the plurality of main blades to a rotation shaft(31) of a motor(30), wherein the hub is formed with a plurality of auxiliary blades(42c) for generating an air current in the rotation direction of the motor, a cylindrical blade attaching part(42b) for attaching the main blades and a driving shaft coupling part(42a) to be coupled with the rotation shaft of the motor, and the auxiliary blades are extendedly formed between the driving shaft coupling part and the blade attaching part.
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