| 摘要 |
PURPOSE:To provide a constant stable combustion condition, by a method wherein, in a combustion type heater mounted to a car and the like, the oscillating frequency of an oscillating circuit driving a fuel pump is variable controlled according to a detecting value of the driving current of a fan motor having a battery serving as a driving source. CONSTITUTION:A combustion type heater mixes together fuel, fed from a fuel pump 8, and air, flowing in through an air suction port 12 with the aid of a blast fan 6 to burn the mixture in a combustion part 9, and heats air for heating, flowing through the outside 15 of the combustion part 9 with the aid of a fan 14 for heating and flows out through an outlet 16. In which case, a current detecting port 10 is provided for detecting the driving current of the fan motor of the blast fan. A frequency varying part 11 is mounted to an oscillating circuit 7 for driving the fuel pump 8, and the varying pat 11 is controlled according to an output from the current detecting part 11. This, even if a fluctuation in the voltage of a battery 5 is high and the number of revolutions of the fan motor is changed, causes a fuel amount to be varied therewith, resulting in the possibility to maintain a stable combustion condition. |
