| 摘要 |
PROBLEM TO BE SOLVED: To automatically prolong operation time in a system where a combustor is automatically extinguished after the lapse of a predetermined time since starting of the operation of the opened combustor. SOLUTION: An air flow passage is provided in a frame which communicates from a back plate to a front plate, and a combustion chamber connected to a burner 2 is opened to the air flow passage. Combustion exhaust gas is exhausted into the combustion chamber after passage through the air flow passage. There are provided a timer 6 for counting operation time of the burner 2 to extinguish the burner after a predetermined time, a memory 9 for storing temperature data of a room thermometer 8, and comparator means 11 for comparing present temperature data of the room thermometer 8 and temperature data in the memory 9. The comparator means 11 returns counting time of the timer 6 when the temperature data of the room thermometer 8 is abnormarily lower than that in the memory 9, and instructs anew the starting of the operation time. |
