CENTRIFUGAL FAN AND AIR-CONDITIONING APPARATUS INCLUDING THE SAME

摘要

A centrifugal fan includes a main plate that is fixed to the rotational shaft of a fan motor and driven by the fan motor, a shroud having an air inlet, and a plurality of blades disposed between the main plate and the shroud. Each blade includes a main blade set on its suction surface side and a blade cover set on its pressure surface side. The main blade is joined to the main plate and the shroud. The blade cover is joined to the main blade, and is biased toward the main blade under the air pressure during rotation. Thus, the joint force between the main blade and the blade cover is enhanced, thereby enhancing the strength of joint of engagement portions of the blade and reducing abnormal noise generated due to the presence of one or a plurality of gaps formed between the engagement portions.

主权项

1. A centrifugal fan comprising:
a main plate that is fixed to a rotational shaft of a fan motor and driven by the fan motor; a shroud having an air inlet; and a plurality of blades disposed between the main plate and the shroud, wherein the centrifugal fan draws a gas by suction in an axis of rotation direction and blows the gas in a direction in which a line intersecting with an axis of rotation of the rotational shaft runs, each of the blades includes a main blade set on a suction surface side thereof and a blade cover set on a pressure surface side thereof, the main blade is joined to the main plate and the shroud, and the blade cover is joined to the main blade.