Patent ID: 6142733
Filing Date: 2000-11-07
Classification: F04D

Abstract:
A fan assembly comprising an axial flow fan, an airflow directing device, and a support inner ring, said fan having a hub portion and a plurality of fan blades, each fan blade having a root region and a tip region, the root regions of each fan blade being secured to the hub portion, the airflow directing device having a plurality of stator blades and a stator support outer ring, said plurality of stator blades extending radially about said support inner ring, each stator blade having a tip region and a substantially constant chord length over about the first 50% of the distance between the support inner ring and the stator support outer ring, and thereafter the chord length increases, said stator blades receive air flow from said fan and divert said airflow, wherein the surface area of the stator blades is substantially less than the surface area of the fan blades.