| 摘要 |
PURPOSE:To prevent deterioration, caused by aggregation, of noble metal catalyst by controlling cell operation so as not to exceed a setting voltage of unit cell at which a noble metal catalyst is deteriorated by aggregation in low load operation. CONSTITUTION:An electric signal sent from an output detector 11 mounted in a cell main body 1 is inputted into a computing element 13, and an instruction is sent from the computing element 13 to a rotating controller 12 of a compressor 2c in an air supply line 2b by pressure pattern corresponding to a setting load. A setting pressure signal is sent to a cell inlet pressure controller 14 and a pressure control valve 15 is controlled so that setting pressure is kept. Operating pressure is controlled in low load operation so that unit cell voltage is made small by decreasing pressure. Thereby, cell voltage in low load operation can be decreased, and deterioration, caused by aggregation, of a noble metal catalyst in low load operation can be prevented. |
