| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell system achieving freeze proofing of an anode gas flow channel, and capable of reliably performing scavenging treatment. <P>SOLUTION: In the fuel cell system 10 provided with a fuel cell 11, an anode gas circulation channel 46 with an anode gas supply flow channel 23 and an anode gas exhaust channel 35, drainage valves 51, 52, and a control part 45 for controlling the drainage valves, the control part includes a freezing prediction part for predicting freezing of the anode gas circulation channel, a pressure reduction part for reducing pressure of the anode gas circulation channel, and a pressure state confirmation part for confirming pressure of the anode gas circulation channel. When freezing is predicted at the freezing prediction part at power stoppage of the fuel cell, the drainage valves are closed, and at the same time, pressure of the anode gas circulation channel is reduced by the pressure reduction part. After pressure of the anode gas circulation channel is confirmed to be at a predetermined pressure lower than the ambient pressure by the pressure state confirmation part, moisture in the anode gas circulation channel is moved toward the fuel cell by opening the drainage valves. <P>COPYRIGHT: (C)2011,JPO&INPIT |
