| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell system having a relief structure that prevents a rise in pressure in a fuel cell with a simple and low-cost configuration. <P>SOLUTION: A fuel cell system includes: a fuel cell; a supply passage for fuel gas; a discharge passage for fuel off-gas and produced water; and an exhaust/drain valve 27 that circulates and shuts off the fuel off-gas and the produced water. The exhaust/drain valve 27 has: a primary circulation path 37a that communicates with the fuel cell; a secondary circulation path 38a that communicates with the outside; a valve seat 41 that is formed annularly between the primary circulation path 37a and the secondary circulation path 38a; a valve body 43 that has formed therein a valve portion 43a that is detachable from the valve seat 41; a valve body operating device 33 that has an output member 44 fixed to the valve body 43 and that moves the valve seat 41 between a closed position and a separated position; and an elastic member 48 that urges the output member 44 with predetermined urging force in a direction in which the valve portion 43a is pressed against the valve seat 41 and that separates the valve portion 43a from the valve seat 41 when a predetermined relief pressure is applied to the primary circulation path 37a. <P>COPYRIGHT: (C)2013,JPO&INPIT |
