| 摘要 |
PURPOSE:To reduce an upstanding flame and the development of soot at the time of extinguishing, by providing a pressure equalizing valve communicating an oil tank with an atmosphere and by providing a small chamber communicating a wick guiding cylinder. CONSTITUTION:At the time of extinguishing, most unburnt gas present in a space 13 above and below a wick flows into a small chamber 15 through a slit opening 16 to mix with an air flowed from an extinguishing port 14 defined through the outer peripheral wall of the chamber 15. An explosive combustion takes place inside the chamber 15 by an ignition from a small tray. A resultant blast is blown to inside the space 13 above and below the wick for thereby extinguishing the fire with no smell accompanied. At this moment, the inner pressure of chamber 4 of oil tank 1 is momentarily increased. However, a pressure equalizing valve 20 is opened and therefore the chamber 4 does not raise its pressure. In consequence, the unburnt gas does not pass through a clearance defined between wick guiding cylinders 8, 9 and a wick 7, whereby substantially reducing the amount of unburnt gas present in the space 13 above and below the wick. Thus, it becomes possible to reduce an offensive smell which would otherwise accompany with the extinguishing action. |
