Patent ID: 9538686
Date: 2017-01-03
CPC Classifications: F04D,H02K,H05K

Claim:
1. A fan comprising: a tightly sealed electronics housing, in which a printed circuit board comprising electronic components is arranged, the electronics housing being divided into an upper region and a lower region, and a cooling wheel arranged in the lower region so as to be axially adjacent to the printed circuit board, wherein the printed circuit board comprises at least one central opening and a plurality of peripheral-edge openings or peripheral-edge gaps in order to bring the upper region into fluid communication with the lower region, the cooling wheel causes air to be drawn out of the upper region into the lower region via the at least one central opening and, via the plurality of peripheral-edge openings or peripheral-edge gaps, the air is fed back into the upper region, wherein an air circuit having at least one air flow develops along a surface of the printed circuit board on which the electronic components are arranged; and the cooling wheel comprises a conical suction region which projects axially into an inlet nozzle directed towards the cooling wheel.