IMPELLER STRUCTURE OF CENTRIFUGAL FAN

摘要

PURPOSE: An impeller structure of a centrifugal fan is provided to reduce noise by evenly exhausting air to an exterior through an exhaust port of a scroll housing. CONSTITUTION: A centrifugal fan having an impeller structure capable of reducing noise includes a motor and a motor bracket coupled to both sides of the motor. An impeller(103) is rotatably coupled to an outer portion of the motor bracket. A scroll housing surrounds the impeller(103) in order to guide air sucked or exhausted by means of the impeller(103). The scroll housing is formed at both sides thereof with a suction port for sucking air from an exterior, and an exhaust port is formed in perpendicular to the suction port so as to exhaust air towards the exterior. The impeller(103) has a ring-shaped intermediate rim(201) and a plurality of blades(202), which are coupled to the ring-shaped intermediate rim(201) in a cylindrical pattern. An axial flow fan(204) is provided at an inner portion of the ring-shaped intermediate rim(201).