| 摘要 |
<P>PROBLEM TO BE SOLVED: To enhance detecting accuracy by preventing the dew formation of a hydrogen sensor 13 when hydrogen in cathode off-gas exhausted from a fuel cell body 1 through an air exhausting passage 5 is detected, and prevent the continuous exposure of the hydrogen sensor 13 to a high wetting off-gas environment to decrease deterioration. <P>SOLUTION: A venturi part 11 is installed in an air exhausting passage (a gas main passage), a branching passage 12 branching from the venturi part 11 is installed, and the hydrogen sensor 13 is installed in the branching passage 12. A valve 14 is closed when hydrogen is detected by the hydrogen sensor 13, and the valve 14 is opened when the hydrogen is not detected. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
