| 摘要 |
PURPOSE:To prevent the occurrence of overflow during low temperature control and to stabilize a combustion state, by a method wherein an open air temperature sensor, detecting an external atmosphere temperature, is mounted, and a control part, inputting a signal from the sensor and controlling a blast temperature, is provided. CONSTITUTION:Various signals from a hot blast sensor 6 and an open air temperature sensor 8 detecting an external atmosphere temperature are inputted to a central computing unit (CPU) 4. The CPU 4 processes the signals to output the signals to an air control fan circuit 10. An open air temperature is detected by the open air temperature sensor 8 when the detected temperature is below a given open air temperature, a pump pulse width is steppedly decreased to a given value and a hot blast temperature is reduced by a control part 2 to stabilize a combustion state. Further, overflow during low temperature control can be prevented from occurring, and flame in a rotary burner can be prevented from being blown off. |
