| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell system switching starting operation to normal operation without increasing the density of a carbon monoxide contained in reformed gas drawn out from a reforming device. <P>SOLUTION: First to third ports of a lead-in side three-way valve are connected to a reformed gas exhaustion port, a reformed gas lead-in port of the fuel cell, and a burner of a combustion part, respectively. The three-way valve shuts a the second port by making the first port communicate with the third port at the starting operation, gradually increases a communicating area between the first port and the second port, and gradually decreases a communication area between the first port and the third port when switching the starting operation to the normal operation, shuts the third port by making the first port communicate with the second port at the normal operation, and shuts the mutual communication of every ports at stopping. By this, when switching the starting operation to the normal operation, the reformed gas is prevented from being suctioned into the fuel cell of which the pressure is turned into negative pressure at stopping, and the stable state of the reforming device is not disturbed. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
