Patent ID: 8029236
Filing Date: 2011-10-04
Classification: F04D

Abstract:
1. A heat dissipation fan comprising a housing; a first rotor comprising a shaft and a plurality of rotor blades; a second rotor coupled to the first rotor and comprising a plurality of rotor blades; a base disposed in the housing for supporting the first and second rotors and comprising a single motor disposed through the base and supported thereby for driving the first and second rotors; a plurality of static blades disposed between the housing and the base, wherein a front portion of each static blade is curved, and a rear portion of each static blade extends straightly along an axial line of the heat dissipation fan, wherein a stagger angle of the rotor blades of the first rotor differs from a stagger angle of the rotor blades of the second rotor; a first air-guiding shroud disposed on a side of the housing, wherein the first air-guiding shroud expands outward or is flared; and a second air-guiding shroud disposed on another side of the housing, wherein the second air-guiding shroud comprises a plurality of static blades disposed therein.