| 摘要 |
PURPOSE:To keep a positive and stable combustion even if a volume of supplied fuel is decreased by a method wherein two fuel nozzles of which supplying positions are different are provided and the nozzles are selectively changed over in response to a variation of the supplied volume of fuel. CONSTITUTION:When started, an electric fan 2 is operated, fuel gas and combustion air, are supplied to the combustion chamber 1 and an explosion is generated in the combustion chamber 1 by an ignition plug 7. Under a dynamic inertia of the exhaust gas taken along with the explosion, the combustion air and the fuel gas are fed into the combustion chamber 1 from the combustion air supplying part 3 and the fuel gas supplying passage 5, and recombustion is carried out by the flame remained in the combustion chamber 1 and the explosion is occurred again. When the pulse combustion becomes stable, operation of the electric fan and the ignition plug 7 is terminated. When a volume of supplying combustion gas is varied by a flow rate adjusting valve 8, a combustion gas supplying position is varied automatically to the first or second nozzles 9 and 10 by a flow passage change-over means 11 such as a fluid element or the like. |
