A centrifugal fan and an air conditioner utilizing it

The present invention relates to a centrifugal fan used in various types of air conditioners such as an indoor unit of an air conditioner and an air conditioner using the centrifugal fan. The present invention additionally forms a rectangular plate or a gurney flap of a twisted shape similar to the alphabet S on an end of a blade installed on the hub of the centrifugal fan to efficiently reduce the noises while increasing the efficiency of the fan. Furthermore, the performance and productivity of the centrifugal fan can be improved by integrally forming the blade with the gurney flap formed on and the hub by injection molding.