| 摘要 |
PURPOSE: Provided is a device for preventing output degradation in fuel cell, which is suitable to rapidly discharge an oxygen-deficiency air in stack, if output of the fuel cell is decreased, and recover the output to normal state so as to improve the generation efficiency. CONSTITUTION: The thermostat device in fuel cell(in the fuel cell, fuel is supplied to stack, and electromotive force is obtained by chemical reaction of the fuel) comprises an output detecting means for detecting an output of stack; and an air-discharging means for discharging an air presented in the stack(10), if output decreasing of the fuel cell is detected by the output detecting means, and changing the oxygen-deficiency air into fresh air. The output detecting means is a voltage sensor(41). The air-discharging means consists of an air discharging line(51) for discharging an oxygen-deficiency air in the stack(10); a pump(52) for forcedly pumping the air in the stack(10); and a valve(53) for gating. |
