Patent ID: 6664673
Filing Date: 2003-12-16
Classification: F04D,H01L,H02K

Abstract:
A cooler for electronic devices comprising:(i) a heat exchange element having a first surface and a second surfaces, a blower with a radial type impeller, and an electric drive, wherein; (ii) said heat exchange element comprising heat exchanging means provided on the first surface of said heat exchange element while the second surface provides thermal contact with a heat-radiating means; (iii) said radial type impeller comprises a shroud with a flat surface on one side, a hub and brackets and a central inlet between the shroud and the hub, said brackets connect the hub with the shroud, said radial type impeller being positioned on the heat exchange element so that the heat exchanging means is surrounded by the radial type impeller and a cooling gas flows to the radial type impeller from the central inlet through the heat exchanging means; (iv) said electric drive comprising a magnetic rotor and a stator, said magnetic rotor being a substantially flat disk rotor comprising a central hole inside the substantially flat disk rotor and circumferential arrayed like poles, and said stator comprising circumferential arrayed coils whose axis are parallel to the axis of rotation, said coils mounted around the circumferential arrayed like poles, and wherein said magnetic rotor is placed on the shroud of the radial type impeller and connects with the shroud, the shaft of the electric drive is located inside the hub of the radial type impeller, and the central hole of the flat disk rotor is substantially coincided with the central inlet.