| 摘要 |
PURPOSE:To stabilize a flame formed on the surface of balancing the combustion speed and the injection speed by providing means for opening and closing the burner port of a combustion part and controlling the ratio of opening and closing times of the opening and closing means or the number of times of opening and closing the same. CONSTITUTION:A vaporized fuel gas is mixed with combustion air, caused to flow outwardly from the circumference of a combustion cylinder 13 provided with a wire net as a premixed gas, and ignited by a igniter in a combustion space formed between an outer cylinder 16 and the combustion cylinder 13 to form a combustion flame. By the ON-OFF operation of a solenoid 23, a drive shaft 22 moves upward and downward, an opening and closing cylinder 20 also moves upward and downward to open and close the communication passage between an opening 19 and an opening 9. The ON time and ON-OFF number of times of the solenoid 23 can be arbitrarily set by a controller 24. When the ON time of the solenoid 23 is varied in accordance with the increase or decrease of the amount of combustion, the average burner port area per time can be varied. By this, the amount of combustion per average burner port area becomes constant even when the amount of combustion varies, the variation of the burner port is removed and the flow-out speed in accordance with the combustion speed becomes constant. |
