| 摘要 |
PURPOSE:To vary the combustion rate through a single burner head, by a method wherein, through regulation of the amount of fuel returned from the bypass nozzle of a liquid fuel combustion device used for a kerosene hot water boiler, the amount of sprayed fuel is varied. CONSTITUTION:Fuel fed to a bypass nozzle 26 from a fuel pump 21 is sprayed by means of the bypass nozzle 26 for combustion. A part of fuel oil is returned to a return flow passage 31 having a solenoid valve 32 and an orifice 33. A control part 34 drives the fuel pump 21, opens and closes the solenoid valve 32 to vary the spray amount, and varies the combustion rate. Since the orifice 33 is molded integrally with a piping connecting member 35 through which an outlet piping part 32A on the downstream side of fuel oil is connected to a piping 31A of the return flow passage 31, mounting of an orifice 33A to the return flow passage 31 is facilitated, resulting in reduction of a cost. |
