PURPOSE: To obtain a combustion device, prominent in burning characteristics, wide in the regulating width of the amount of combustion, and safe, by a method wherein stages of flow control tubes are provided in up-and-down direction so as to form venting sections, having the bottom surfaces thereof in flow control areas formed between an inner flame tube and communicating with a combustion chamber, while an interval between the flow control areas is specified.
CONSTITUTION: A flow control tube B23 is provided so as to have the bottom surface thereof in a flow control area B24 in the same manner as the flow control tube A22 while an interval (1) between the flow control area A22 and the flow control area B24 is specified so as to be 20% or less of the inner diameter D of an inner flame tube 6. When the exposed height of a wick 1 is reduced to reduce the amount of combustion, flame descends gradually into a combustion chamber 8 and becomes the flame (fs). In this case, the amount of evaporated gas is reduced remarkably, therefore, the amount of unburnt gas, which flows into the flow control area B24, is also reduced. Accordingly, a mixing area, in which the unburnt gas is mixed with air shown by white arrow signs (e) in a diagram, descends to improve in the vicinity of an area D. Holding flame is formed in this part, and the wall surface of the inner flame tube 6 is brought into red-hot condition. Combustion is promoted and the combustion is finished in the flame (fs) formed above the wall surface of the inner flame tube 6. In this case, most of unburnt gas, flowing into the flow control area B24, is burnt in the flame (fs); therefore, exhaust gas characteristic (CO/CO2) will never become worse.
| JPS58120009 | COMBUSTION CYLINDER |
UNO KATSUHIKO
INOUE SHOJIRO
