CENTRIFUGAL FAN

摘要

PROBLEM TO BE SOLVED: To provide a centrifugal fan capable of suppressing the lowering of a total pressure efficiency and the increase of noise due to a separation by suppressing the separation from the surface of a blade at an operating point in a large flow/low static pressure zone in the centrifugal fan used for air ventilation/blowing devices and air conditioners. SOLUTION: This centrifugal fan is formed in such a manner that different outlet anglesβ2 are provided by twisting a part or all of blade outlet parts 1 from a main plate 2 side to a side plate 3 side in order in the state of the blade outlet part on the main plate 2 side moving forward from the blade outlet part 1 on the side plate 3 side. By this, the total pressure efficiency can be increased and noise can be suppressed. COPYRIGHT: (C)2005,JPO&NCIPI