| 摘要 |
PURPOSE:To enlarge the regulation range of a combustion amount and to facilitate supply of hot water and a hot air at a specified temperature, by a method wherein an exhaust gas regulator is located on an exhaust running from a combustion part, and a fuel regulator is situated on a fuel passage. CONSTITUTION:If, in a pulse combustion condition, the flow rate of fuel gas is reduced by a fuel regulator 7, an expansion force is reduced due to an increase in an air ratio during expansion, and pulse combustion is hard to maintain. If the flow rate of fuel gas is increased, an amount of the air sucked is decreased, a combustion condition worsens resulting from a decrease in an air ratio, and CO concentration in exhaust gas is increased. Meanwhile, by increasing draft resistance, produced during passage of exhaust gas, by means of an exhaust gas regulator 20, a maximum combustion amount and a minimum combustion amount can be reduced. Thus, the exhaust gas regulator 20 is operated in linkage with the fuel regulator 7 to increase a combustion amount, i.e., the flow rate of combustion gas and also increase the opening of the exhaust gas regulator, and this permits enlargement of the regulation range of a combustion amount. |
