Patent ID: 7044720
Filing Date: 2006-05-16
Classification: F04D

Abstract:
1. A fan motor which comprises: a cylindrical rotor; one or more fan blades extending from a perimeter of said cylindrical rotor in a radial direction of the rotor, each fan blade having a proximal side adjacent to the rotor and a distal side, wherein said fan blade has a first surface on the proximal side and a second surface on the distal side, said first and second surfaces having different curvatures, wherein the curvature of said first surface allows the air drawn in from a rotational axis of said rotor to be impelled such that the air is raked up gradually toward the distal side in association with the rotation of said fan blades, wherein the curvature of said second surface allows the air flowing from the proximal side to be further strongly impelled in a perimetric direction, and wherein said fan blade has opposite end surfaces from which air is drawn in.