CONTROL METHOD OF WELL DEVICE, AND WELL DEVICE

PROBLEM TO BE SOLVED: To provide a control method of well device, and well device which decreases fine particle of earth and sand that flows in by reducing start and stop frequency of submerged pump as much as possible, and which suppresses total water supply cost to minimum. SOLUTION: The control system decides before beginning of water supply of submerged pump by simulation water supply start time, water supply expected completion time, and the amount of scheduled water supply of each time and time zone by which total supply cost becomes the lowest, based on the measurement signal of water gauge and predetermined demand pattern; and after beginning of water supply of the submerged pump, the control system calculates the amount of target water supply for every setting time interval at any time based on the measurement signal of water gauge and flow meter, outputs each calculated and determined control signal as flow control of flow control valve and start and stop control of the submerged pump, and controls the amount of water supply. COPYRIGHT: (C)2005,JPO&NCIPI