| 摘要 |
PURPOSE:To restrict an amount of generation of toxic discharged material when ignited and to enable low cost combustion control with less amount of nitrogen oxide under stable combustion by a method wherein a signal expressing an amount of combus tion less than a signal at an initial combustion amount transmitting part is sent to a fuel supplying means as a signal expressing an amount of combustion after a flame sensor means detects an ignition. CONSTITUTION:When ignited, upon transmission of combustion air signal from an amount of air transmitting part 11, the combustion air is supplied to a burner 1 by a blower fan 6 through a fan driving circuit 14. In turn, upon transmission of fuel signal from an initial combustion amount transmitting part 12, the fuel is supplied to a burner 1 by a fuel pump 3 through a changing-over part 15 under a control of a pump driving circuit 16. At this time, each of the signals is set in such a way that air ratio is less than 1.0 and then the ignition is easily attained. Simultaneously with a sensing of the ignition with a flame rod 9, supplying of fuel is changed over by the changing-over part 15 so as to transmit the signal from the combustion amount transmitting part 13. The signal of combustion amount from these operations is a signal of a less combustion volume than the combustion amount to be transmitted from the initial combustion amount transmitting part 12 to cause the fuel to be de creased in such a way as an air ratio is more than 1.0. |
