CONTROLLER OF GAS COMBUSTION

摘要

PURPOSE:To keep an adjusting range of a combustion quantity constant even if a kind of gas is varied by enlarging an adjusting range of a combustion quantity, by providing a differential pressure sensor detecting a pressure difference between the upper stream of a gas throttle and the upper stream of a primary air throttle, and a variable secondary air throttle. CONSTITUTION:An adjusting device 16 of a gas quantity, a gas throttle 17 are provided on a gas side duct 15 and gas is joined to primary air for combustion at a mixing part 7. Either of a gas quantity adjusting device 16 or an air quantity adjusting device 3 or both of them are controlled by a control circuit 19 by receiving an electric signal of a differential pressure sensor 18 detecting differential prssure between pressure PA of an upstream side of a primary air throttle 6 and pressure PG of an upstream side of a gas throttle 17. A secondary air quantity is adjusted microscopically by a variable secondary air throttle 11 according to a kind of gas. With this construction, the titled device is so constituted that it is made possible to make an adjusting ratio invariable even if the kind of gas is varied by enlarging the adjusting ratio of a combustion quantity.