| 摘要 |
PURPOSE:To continuously control the quantity of flow in wide area by detecting the operational quantity of the flow in a pipe arrangement and executing the on/off control of a valve with the operational quantity obtained by integrating in a specified time if the detected result is less than a specified quantity. CONSTITUTION:The wide area controller of flow is constituted of an regurator 9 which outputs the operational quantity for controlling the quantity of flow in the pipe arrangement 17, an ON-OFF controller 11 which outputs a signal equal to the integrated value obtained by integrating the operational quantity if the operational quantity of the unit 9 is less than the specified value and a switching unit 13 which executes the switching of the valve 15, etc. And even if the operational quantity MV from the above-mentioned accommodation unit 9 is a value which is not suitable for the continuous control of a low flow area, the ON-OFF controller 11 controls the ON/OFF of the valve 15 after it reaches the low flow area. Therefore, the continuous control can be executed even in the low flow area.
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