| 摘要 |
PURPOSE:To enable realization of stable combustion prevented from lift of flame even in a high load combustion area by a method wherein a suction port, through which the open air is sucked, is formed in a reverse direction to a fuel-air mixture injection direction in a portion in the vicinity of a burner port through which fuel-air mixture is injected. CONSTITUTION:A fuel gas feed passage 2 and a blower 3 for feeding combustion air for a fan and a blower are connected to a burner body 1, and a suction port 5 for sucking the open air is formed in the vicinity of a burner port 4n of a burner body 1 throughout the whole periphery. An intake air passage 6 of the blower 3 is connected to the suction port 5, the open air is sucked in a reverse direction to a direction, in which fuel-air mixture is injected through the burner port 4, through the suction port 5, and a lift of flame through the burner port 4 through a pull-back action force by means of the suction open air is prevented from occurring. Flow rate regulate valves V are respectively located in the fuel gas feed passage 2 and a combustion air feed passage 7. An input and an air-fuel ratio can be set to respective proper values, and a flame pull-back action force is regulatable according to the set values. Even in a superhigh load combustion area, stable combustion prevented from the occurrence of a lift of flame can be realized. |
