| 摘要 |
PURPOSE:To prevent incomplete combustion and to maintain and improve combustible performance by providing an electrical heater on the outer circumference of the step part of the fire grate part on the outer cylinder side and letting the current flow according to the reduction of vaporization. CONSTITUTION:When tar is stuck to the surface of a wick 3 or concentration of oxygen reduces slightly, vaporization of fuel from the wick 3 reduces. Then, a temperature detector 13 detects the fall of the combustion heat value, current begins to be applied to a heater 12, the heat of this heater 12 compensates for the reduction of combustion heat value and restrains reduction of vaporization of fuel from the wick 3. Accordingly, the incomplete combustion etc. due to the reduction of vaporization can be prevented in advance and further, the deceleration of combustible performance due to the hindrance of inflow of vaporizing air can be avoided. |
