Patent ID: 6652246
Filing Date: 2003-11-25
Classification: F04D

Abstract:
A centrifugal fan having an upside-down mounted structure on a heat-dissipating plate comprising:a frame fixed on said heat-dissipating plate, said frame including: an upper surface positioned away from said heat-dissipating plate; a side surface substantially perpendicular to said upper surface; at least one inlet formed on said upper surface; an outlet formed on said side surface; and an air duct defined therein; a stator upside-down mounted in said frame and fixed on said upper surface, said stator including a printed circuit board positioned close to said upper surface and positioned away from said heat-dissipating plate; and a centrifugal impeller enclosing said stator and capable rotating with respect to said stator, wherein the air duct collects airflow generated by said centrifugal impeller to increase an air pressure and a quantity of air produced by the centrifugal fan.