| 摘要 |
PURPOSE:To maintain good combustion state by providing a tubular nozzle body formed with predetermined nozzle at the side wall in an intermediate casing between suction port and delivery port and under the condition of burner departing from optimal load combustion range, rotary nozzle forming member is rotated from outside thereby selecting optimal nozzle diameter. CONSTITUTION:A box type casing 4 is provided between a suction port 3a and delivery port 3b to contain a tubular nozzle forming member 1 provided with nozzles 2 of various diameters on the side wall rotatably while a flow path 5 between the casing 4 is blocked with a shieldingboard immediately before the delivery port 3b. When rotating the nozzle forming body 1 in the casing 4 such that a nozzle of desired diameter will come immediately above the delivery port 3b, an amount of fuel limited by the diameter of said nozzle 2 will inject. |
