| 摘要 |
PURPOSE: An axial flow fan is provided to reduce fan noise at a tip area and to allow air to easily flow while improving blowing performance of the axial flow fan by reducing speed component in a radial direction of the axial flow fan. CONSTITUTION: An axial flow fan includes a hub(21) coupled to a driving shaft of a motor and a plurality of blades(22) radially installed around an outer peripheral portion of the hub(21). The blade(22) has a wave shape and is provided with a tip area(22a), which is curved toward a negative pressure plane of the blade(22). The blade(22) generates fan noise, which is varied according to a pitch angle, a rake angle, a sweep angle and a camber of the blade(22). The blade(22) prevents air from being biased toward the tip area(22a) caused by centrifugal force.
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