| 摘要 |
PURPOSE:To keep almost constant the ratio of the air in the primary combustion chamber and the fuel in a wide variable range of combustion amount and reduce the odor and the carbon monoxide by lifting up and down a secondary combustion cylinder provided with an air inlet which projects into the upper section of an inner flame cylinder and partly directed in its outer circumferential direction with the movement of the secondary combustion cylinder interlinked with the up-and-down movement of the flame wick. CONSTITUTION:The air is increased or reduced by the variation in pressure loss applied in a combustion chamber by changing the gap between the inner circumference of a secondary flame ring 7 and the outer circumference of a secondary combustion cylinder 8. The secondary combustion cylinder 8 is interlinked with the up-and-down mechanism of a flame wick 1 to be lifted up and down correspondingly. It is possible, therefore, to keep the ratio of combustion amount (vaporization amount) and air amount substantially constant by giving an appropriate relation between the height of exposure for a flame wick 1 and the gap between the secondary flame ring 7 and secondary combustion cylinder 8, and also to prevent abnormal combustion due to excess or shortage of the air. The secondary air is supplied substantially perpendicularly to the unburned gas that rises from a primary combustion chamber by providing an air inlet 8a on the side of outer circumference of the secondary cylinder 8, improving the mixture of the unburned gas in the secondary combustion section with the secondary air.
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