| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell system capable of efficiently heating a control valve and starting early by a simple constitution. <P>SOLUTION: When the fuel cell system is stopped operation, a control part closes a first pressure control valve 5 and a second pressure control valve 6 of a hydrogen flow-passage 2, opens a backpressure control valve 7, a shut-off valve 9, and a shut-off valve 11 of a bypath route 10, and opens the interior of the fuel cell body 1 to the air. Furthermore, the back-pressure control valve 16 of an air flow-passage 3 is closed, the bypath route 17 is selected by a three-way valve 18, and a gas flow into the main body side flow passage 3a is made to a shut-off state. When the control part detects freezing of the control valve in starting operation of the system, it makes the air flow into bypath routes 10 and 17 by actuating a hydrogen pump 8 and an air pump 15 prior to starting of the fuel cell system, and heats the control valve by this. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
