| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent freezing by effectively removing moisture remaining in a fuel cell system. <P>SOLUTION: When a stopping instruction of a fuel cell system 20 is made, and in the case there is a possibility of freezing by the lowest temperature within 24 hours estimated by depending on the outside temperature detected by an outside temperature sensor 80, a flow control valve 54 of the fuel cell stack 22 and an air exhaust system 50 and atomizers 62-66 installed on a silencer 56 are operated and the water remaining inside is atomized, and at the same time, by switching to a bypass supply tube 42 and a bypass exhaust tube 52, a humidifier 46 is bypassed, and an air compressor 44 is driven and they are scavenged. Then, the fuel cell stack 22 is run idle, and when the fuel cell stack 22 generates a dried-up phenomenon, it is judged that scavenging is completed, and the system is stopped. Thereby, the water remaining in the fuel cell stack 22 and the air exhaust system 50 is rapidly removed and its freezing can be prevented. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
