| 摘要 |
PROBLEM TO BE SOLVED: To stably extinguish fire by reducing the speed of a blower for convection to a specific value or less when starting extinction operation for weakening the wind force of air for convection and then decelerating the blower for combustion. SOLUTION: A liquid fuel from a fuel supply device 23 is vaporized by a vaporizer 21 on heating operation, the vaporized gas is mixed with air for fuel from a blower 24 for combustion, the mixed gas is ignited by an ignition device 22 at a flame-forming part for combustion, and the combustion gas is discharged by a blower 25 for convection. Then, when an operation off switch 14 is operated, a drive signal to the blower 25 for convection is stopped first to decrease the speed of the blower 25. Then, when it is judged that speed has reached a target value, it is judged whether the drive output of an electromagnetic pump 23 is completed or not. Then, the drive of the electromagnetic pump 23 is stopped when it is YES. At the same time, the drive signal to the blower 14 is stopped and a deodorizing operation is performed, thus preventing oil from dripping from the nozzle tip part due to the inertia of the fuel supply device 23. |
