| 摘要 |
A shutoff valve (40) provided on the entrance side and exit side of a fue l cell system has a diaphragm (42). A valve closing-side pressure chamber (4 3) is provided on the upper face side of the diaphragm (42), and a valve ope ning-side pressure chamber (44) is provided on the lower face side of the di aphragm (42). With the valve closing-side pressure chamber (43) of the shuto ff valve (40) pressurized, the pressure in the chamber (43) is maintained by ViS, ViC, and ViO in an electrically non-conducted state. Also, the pressur e in the valve opening-side pressure chamber (44) of the shutoff valve (40) is maintained released. By this, force acting in the direction of closing a valve body (41) acts on it through the diaphragm (42), maintaining the shuto ff valve (40) closed. |
