| 摘要 |
PURPOSE:To reduce an offensive odor at the usual time of fire-cut by installing at least one auxiliary wick part in the main wick in such a way that the height of the auxiliary wick part is higher than the other parts of the main wick at the upper part of the wick. CONSTITUTION:The wick 1 is composed of suck-up wick, main wick 1a and auxiliary wick and its lower end is submerged in the fuel at a tank bottom and during combustion, the upper end is exposed in the combustion chamber 4 and the wick supplies fuel by capillary action. At the time of fire-cut the wick 1 is descended by up-down mechanism and it is put back into the gap between outer cylinder 6 and wick guide cylinder 7 and as a result, its vaporizing area is reduced largely. therefore, combustion at a combustion chamber 4 stops and the flame 11 is formed at the fire dich 10 and the flame becomes smaller and is put out in response to reduction of temp. at the fire dish. At that time, even when temp. of the main wick is reduced and mixed gas at the upper end of the wick is diluted, combustion is continued by the flame formed at the auxiliary wick 1b. At the time of fire-cut by reduction of temp. of auxiliary wick and the volume of vaporized gas, temp. of the main wick is far more reduced than that of the auxiliary wick. Therefore, generated volume of vaporized gas is small and generated odor is largely reduced after fire-cut.
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