| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell system capable of restraining backward flow of supplied gas when starting, purging, or generating power at a low load, capable of restraining freezing of a fluid flow limiting member arranged on an off-gas circulation passage restraining backward flow of supplied gas at low temperature. <P>SOLUTION: The fuel cell system 1 is composed of a fuel cell 2; a gas supply passage 22 through which the gas to be supplied to the fuel cell 2 flows; an off-gas circulation passage 23 through which the off-gas exhausted from the fuel cell 2 flows and returns to the fuel cell 2 again; an ejector 24 arranged at a confluent point of the gas supply passage 22 and the off-gas circulation passage 23, mixing the gas to be supplied and the off-gas; a flow passage 44 arranged on the off-gas circulation passage 23, capable of making the gas flowing through the off-gas circulation passage 23 flow in a regular direction and a reversed direction; and a fluid flow limiting member 40 whose resistance against flow in the regular direction is smaller than that in the reversed direction. <P>COPYRIGHT: (C)2007,JPO&INPIT |
