| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell system capable of efficiently removing impurities such as water in a fuel electrode passage while restraining deterioration of the fuel economy. <P>SOLUTION: A valve 7 is used to switch to supply to a fuel electrode entrance 21, humidified hydrogen or non-humidified air compressed by a compressor 5. A valve 8 is used to switch to supply to an air electrode entrance 23, humidified air or the non-humidified air compressed by the compressor 5. When starting or stopping this fuel cell system, the non-humidified air is supplied to the fuel electrode and the air electrode from the valves 7 and 8, a valve 11 communicating with the gas passages of both electrodes is opened, and thus air purging is carried out with the non-humidified air. <P>COPYRIGHT: (C)2004,JPO |
