| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fuel cell system in which flow passage blockage due to freezing is hard to occur. <P>SOLUTION: The fuel cell system comprises: an anode gas supply passage 23 for supplying anode gas to a fuel cell 1; a fuel gas circulation passage 30 comprising a ejector 50 in which anode off-gas exhausted from the fuel cell 1 is mixed with the anode gas to be re-supplied to the fuel cell 1; an anode off-gas exhaust passage 33 having a exhaust valve 31 for exhausting the anode off-gas exhausted from the fuel cell 1 to the outside; a cathode gas supply passage 9 for supplying cathode gas from a compressor 7 to the fuel cell 1; and a scavenging inlet passage 43 enabling introduction of the cathode gas from the compressor 7 to the anode gas supply passage 23. A confluence part of the scavenging inlet passage 43 and the anode gas supply passage 23 is disposed on the downstream of the ejector 50, and a check valve 27 for inhibiting the cathode gas introduced via the scavenging inlet passage 43 from flowing toward the ejector 50 side is provided between the ejector 50 and the confluence part. <P>COPYRIGHT: (C)2009,JPO&INPIT |
