Patent ID: 7122924

Claim:
A rotor device capable of forcing heat dissipation, comprising: a hub with a closed end and a circumferential wall, being circular with a channel shaped cross section, providing at least a through hole circumferentially disposed at the closed end, a plurality of fan blades being joined to the circumferential wall and the center of the inner side of the close end extending a shaft opposite to the close end; an inner casing, being annular with an L shaped cross section, being joined to the hub in a way of bonding to the inner side of the circumferential wall and the inner side of the close end; a rotor, being disposed to fit with the inner side of the inner casing; a stator, being disposed inside the rotor and providing a central bore; and a base, providing an axial hollow barrel to fit with the central hole of the stator and the inner side thereof fitting with a bearing for the bearing being able to fit with the shaft; characterized in that at least a circular plate shaped projection extends inward from the inner side of the through hole along a half portion of the circumference of the through hole with two opposite straight lateral sides of the projection are disposed at a radial central line of the through hole extending from the center of the close end for fluid in the hub capable of moving outward with the heat via guidance of the projection.