Fan impeller for electric motor has crown wheel, where fan blades extend over radial expansion of crown wheel, and crown wheel has two recesses, where every recess is arranged between two neighboring fan blades

摘要

The fan impeller (5) has a crown wheel (7), where fan blades (11) are arranged on the crown wheel. The crown wheel has a radius which amounts to half of tips of fan blade radius. The fan blades extend over a radial expansion of the crown wheel. The crown wheel has two recesses, where every recess is arranged between two neighboring fan blades. An independent claim is included for an electric motor.