| 摘要 |
PURPOSE:To vary the combustion amount and air amount in a burning flame zone and to enlarge the variable width of excellent combustion by providing a combustion portion communicating with mixing means for mixing a fuel with air and periodically varying the amounts of the fuel and air to be supplied. CONSTITUTION:A fuel ejected through the tip nozzle portion of a fuel thin pipe 6 assumes a granular shape and comes into collision with the wall surface of a carburettor 1, and receives heat on the wall surface heated to a high temperature to be converted into a vaporized gas, which passes through a throttle portion of a mixing plate 3 arranged at the upper part and flows to a combustion cylinder 13. The fuel gas as a premixed gas flows outward from the circumference of the combustion cylinder 13 provided with a wire net, and is ignited by an igniter in a combustion space 15 between an outer cylinder 16 and the combustion cylinder 13 thereby to form a combustion flame or the surface of the wire net 12. By setting combustion heat, the fuel in an average combustion amount is blown off by a fuel pump 7 based on the control of a control part 19, and at the same time, combustion air in an amount in accordance with the combustion amount is supplied from a blower 5 by the control of a control part 20. The control parts 19 and 20 control the fuel and air, respectively to predetermined amounts based on the average amounts thereof thereby to vary the amounts and periods thereof in a predetermined width. |
