| 摘要 |
PROBLEM TO BE SOLVED: To provide a combustion device capable of detecting the occurrence of incomplete combustion, without fail. SOLUTION: The combustion device has a first FR (flame rod), having an environment where the air for secondary combustion is sufficiently supplied, and a second FR having an environment where the supply of the air for secondary combustion is suppressed by covering an air hole. Flame current of the first FR and flame current of the second FR are detected (S15, S17), after a combustion state is obtained, by opening a gas solenoid valve (S11) and performing an ignition processing (S13). The difference between the detected flame currents is calculated (S19). Since the flame of a portion limited in the supply of the air for secondary combustion, is lifted at an early stage at oxygen deficiency, a difference occurs between the flame current of the first FR and the flame current of the second FR. When the value of the difference is a prescribed threshold value or more (S21:YES), the gas solenoid valve is closed (S27), and combustion operation is stopped. COPYRIGHT: (C)2011,JPO&INPIT |
