| 摘要 |
PURPOSE:To make stoppage of a power generator smooth if a power source or a sequencer fails by disposing a second electromagnetic changing valve, a third electromagnetic changing valve equipped with a restore spring in series with a control gas system having a first electromagnetic changing valve, and providing a bypass tube for bypassing the second electromagnetic changing valve and connecting the first electromagnetic changing valve with the third electromagnetic changing valve having the restore spring. CONSTITUTION:If energization to an electromagnetic changing valves 21, 27 or an electromagnetic changing valve 28 equipped with a restore spring becomes impossible by failure of a constant voltage power source 24 or a sequencer 25 when a power generator is controlled by action of the sequencer 25, the electromagnetic changing valve 27 is in a closed condition while the other ports are released to open air, and the electromagnetic changing valve 28 equipped with the restore spring is changed to be connected with a port of the electromagnetic changing valve 27 which is released to open air by the restore spring, so an exist supply tube 23 is released to open air. Gas drive valves 10, 14 are thus closed. Hydrogen or oxygen is not supplied to a fuel cell 1, but nitrogen gas is supplied to the fuel cell 1, thereby the fuel cell 1 is purged by nitrogen. |
