| 摘要 |
PURPOSE: An axial flow fan is provided to reduce a pressure difference caused by a flow rate difference at each portion of the axial flow fan to thereby decrease noise. CONSTITUTION: An axial flow fan includes a first side, a second side, a blade(120), a noise elimination portion(130), and a noise removal part. The first side generates airflow when rotated. The first side is exposed to a suction into which the air is inhaled. The second side is exposed to a discharge side through which the air is exhausted. The blade comprises the second side. The noise removal part removes air flow noise of the surface of the blade. The noise removal part depresses a part of the first side to the discharge side or projects a part of the first side to the suction. |
