| 摘要 |
PURPOSE:To improve combustion effect, by making gas, which is apt to generate a red flame through incomplete combustion, recirculate to a stoking part again. CONSTITUTION:A suction hole 6 sucking gas into an inside part of a combustion cylinder 4 is provided on a circumferential wall 5 part of the combustion cylinder 4 positioning on an external circumferential part of a front position of a combustion board 3, and the suction hole 6 is provided in a connected state with an evaporating cylinder 1 so as to send air into the evaporating cylinder 1. Part of gas in an external circumferential part of the combustion board 3 is sucked into the suction hole 6 during combustion action, recirculated to the evaporating cylinder 1 and erupted forward through the combustion board. Then even if a part wherein complete gasification is not being made like raw gas is generated, as it is quite few to generate a red flame at the front of the combustion board 3 and, moreover, the flame is apt to be sucked to an external circumferential side, combustion effect can be improved by making a temperature of gas to be circulated to the evaporating cylinder 1 through the circumferential wall 5 part of the combustion cylinder 4 and the suction hole 6 high. |
