| 摘要 |
PURPOSE:To lengthen the service life of a fuel cell by reversing a fuel gas inlet part and an outlet part to the fuel cell with every prescribed condition. CONSTITUTION:A changeover switch S switches the first three-way valve V1 according to a prescribed condition signal, and connects a supply circuit LA to the first circuit L1, and switches the second three-way valve V2, and switches a discharge circuit LB to the fourth circuit L4. Then, a fuel gas circuit is formed so that fuel gas G can flow in a fuel cell B in the arrow (a) direction of the circuit LA, the circuit L1, the fuel cell B, a circuit L2 and the circuit LB. The switch S switches the valve V1 according to the prescribed condition signal, and switches the circuit LA to the third circuit L3, and switches the valve V2, and switches the circuit LB to the fourth circuit L4. Then, a reversal fuel gas circuit is formed so that the gas G can flow in the fuel cell B in the arrow (b) direction of the circuit LA, the circuit L3, the circuit L2, the fuel cell B, the circuit L1, the circuit L4 and the circuit LB. Thereby, a fuel cell surface is used uniformly, so that the service life of the fuel cell can be lengthened. |
