PRESSURE STABILIZING VALVE CONTROLLER FOR BURNER

PURPOSE: To provide a pressure stabilizing valve controller for a burner, which is capable of mitigating the reduction of fuel pressure upon igniting a burner and the increase of the fuel pressure upon shutting off the burner. CONSTITUTION: Upon igniting a burner, a pressure stabilizing valve 35 is controlled by a feedback control unit 16 so that a fuel pressure becomes an objective pressure. Upon shutting the burner off, an integrator 18 is operated by a shutt-off command Bb to shut off a signal from a subtractor 15 while a rectangular wave signal generator 26 is operated to switch an analog signal switch 20 to the side of a low opening degree setter 23 and output the signal of opening degree 30% to the pressure stabilizing valve 35. Thereafter, the rectangular wave signal generator 27 generates a rectangular wave signal for 10 seconds by a shutt-off signal COFF to switch the analog signal switch 21 to the side of a high opening degree setter 24 and output the signal of opening degree 100% to the pressure stabilizing valve 35. On the other hand, the analog signal switch 19 is switched to an ordinary opening degree setter 22 by the shut off valve closing signal COFF to select the signal of opening degree 60% and output the same to the pressure stabilizing valve 35 after 10 seconds.