Patent ID: 7354669

Claim:
Fuel cell system with several fuel cells assembled to form a fuel cell stack which has an anode side, a cathode side and a membrane arranged between the anode side and the cathode side, the anode sides of the fuel cells being connected to form an anode cycle, which additionally includes a feeding device for fresh gaseous fuel, a drain valve for continuous or discontinuous discharging of at least part of the gases flowing in the anode cycle as well as a component having at least one movable part and having spaces therein, the component returning at least a portion of the exhaust gases emerging from the anode side of the fuel cells to the anode sides of the fuel cells, and a scavenging gas inlet, arranged to supply dry compressed air to the component and deliver it through the spaces in order to expel and/or dry out water, an air compressor which delivers compressed air to the cathode sides of the fuel cells and a connecting line from the air compressor to the scavenging gas inlet.