| 摘要 |
A centrifugal fan has a circular main plate rotationally driven by the rotating shaft of a motor, blades fixed to the outer periphery of the main plate with predetermined intervals provided in the circumferential direction of the main plate, and a side plate fixed to those ends of the blades which are on the side opposite the main plate. An air suction hole is provided at the center of the side plate. The side plate has a circular-arc cross-sectional shape outwardly inclining in the centrifugal direction from the air suction opening and having a predetermined curvature. Between the side plate and the blades is provided a space for reducing adead air region. The space forms smooth flows on both sides of a blade to allow the blades to exhibit good performance. |
