| 摘要 |
PURPOSE:To make accurate control possible without hysteresis phenomenon by adjusting a signal fed to a solenoid coil so as to be ''0'' in every reduction of the signal. CONSTITUTION:During the period when an output A generated from an electric signal generating circuit 1 according to an output from the temperature detector F5 of a regregerator F is decreasing, the output of an amplifier 9 equipped with gate means is reduced to ''0'' only for the period of one pulse from a one shot pulse generating circuit 7 in every time the reduction value exceeds standard value S and the remaining megnetism of a solenoid valve F3 disappears, keeping the opening extent of the valve F3 at the opening extent on the going line of a hysteresis curve. While the output A is increasing, the output D is continuously generated without reduction to ''0''. Thus, the opening extent 3 of the valve F3 can be accurately controlled by the output information of the temperature detector F5. |
