| 摘要 |
PURPOSE:To shorten preheating time, by a method wherein a vaporizing chamber is formed with a double cylinder of an inner and an outer cylinder, the inner cylinder is formed with the outer peripheral part of a heater for application from the outer cylinder, and a nozzle is situated to the protrusion part and in a direction of extending perpendicularly to the axis of the inner cylinder. CONSTITUTION:By energization of a heater 25 for application of heat, the heater 25 is actuated. When the temperature of a tip part 22a increases and the temperature of a temperature detecting device 30 increases to a given value, fuel is fed to a vaporizing chamber 23 through a feed pipe 24. Thus, the fuel is brought into contact with the surface of an inner cylinder 22 for vaporization, and the vaporized fuel flows through a fuel steam outflow port 29 to a nozzle pointing in a direction of extending at right angles with the axis of the inner cylinder and is injected in a burner. This constitution eliminates the need of a conventional metallic block, having a high heat capacity and situated in a steam passage, and enables shortening of preheating time.
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