| 摘要 |
PURPOSE: An axial flow fan is provided to reduce noise generated when the fan is rotated by having main blades and auxiliary blades with a different shape. CONSTITUTION: An axial flow fan comprises a hub(100), main blades(200), and auxiliary blades(300). The main blades are arranged in a radial shape. The auxiliary blades are arranged between the main blades. The main blades and the auxiliary blades arranged at equal intervals have a different shape. More than one of the sweep angle, the pitch angle, the width of the blades, and the camber value of the main blades and the auxiliary blades are different.
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