| 摘要 |
A cooling fan for a vehicle for noise reduction is provided to prevent aerodynamic noise from being caused by the speed of a fan and the number of blades through installation an auxiliary blade at an end of a suction surface of each blade and irregular formation of an angle between adjacent blades. A cooling fan for a vehicle for noise reduction comprises a hub and a plurality of blades(10). A connection member connected with rotating shaft of a driving motor is inserted into the hub. The blades are radially formed in the outer peripheral surface of the hub. An auxiliary blade(13) is mounted at an end of a suction surface of each blade. The blade is formed at an angle of 6° to 35° in the flow direction of external air with respect to the rotation direction the rotating shaft, and an angle between adjacent blades is differently formed. |
