IMPELLER STRUCTURE FOR CENTRIFUGAL FAN

摘要

PURPOSE: An impeller structure for a centrifugal fan is provided to reduce noise and to improve efficiency of the centrifugal fan by installing a turbo fan and a sirocco fan at inner and outer portions of an impeller, respectively. CONSTITUTION: A centrifugal fan having an impeller structure includes a motor. A motor bracket is coupled to both ends of the motor. An impeller(103) is rotatably coupled to an outer portion of the motor bracket in order to suck/exhaust air. A scroll housing is provided at an outer portion of the impeller(103) in such a manner that the scroll housing surrounds the impeller(103). The scroll housing guides air introduced into or exhausted from the scroll housing. The impeller(103) has a middle plate(201) having a disc shape. A turbo fan(202) is installed at one side of the middle plate(201). A sirocco fan(203) is installed at the other side of the middle plate(201).