Fan

Details Fan Fan

F - Mech Eng,Light,Heat,Weapons

04

D

F04D 29/58 (2006.01) F04D 25/06 (2006.01) F04D 25/08 (2006.01)

Patent

CA 2734362

The present invention relates to a fan consisting of an electric external rotor motor and of a fan wheel, the external rotor motor consisting of a stator encapsulated with an insulating material, and of a rotor carrying the fan wheel enclosing the stator in a pot-shaped manner. On the one hand, the rotor has ventilation openings in a front wall, and, on the other hand, the stator has projecting fins on a front area arranged and distributed over the circumference which is opposite the ventilation openings. A gap between a circumferential rim of the rotor opposite the front wall and a stator carrier forms a passage for a cooling air current flowing around the stator during operation. During operation, the cooling air is swirled intensively between the ventilation openings and the projecting fins for cooling the motor.

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