Patent ID: 7862001

Claim:
A method of controlling volume of water used in each sensor-operated flushing cycle of a flushing system comprising an automatic flush actuation apparatus, comprising the steps of: (a) normally blocking water flowing from a water inlet to a water outlet through a flush channel of said flushing system by means of said automatic flush actuation apparatus, and moving a relief valve of said automatic flush actuation apparatus to an auto-operated closed position for blocking said water passing to said water outlet through said flush channel of said flushing system; (b) starting said flushing cycle of said flushing system by allowing water flowing from said water inlet to said water outlet through said flush channel of said flushing system through said automatic flush actuation apparatus, and moving said relief valve to an auto-operated opened position to start said flushing cycle for allowing said water flowing from said water inlet to said water outlet of said flushing system through said automatic flush actuation apparatus, wherein said relief valve has a water passage and a valve stopper, which is driven by an actuator to move between said auto-operated closed position and said auto-operated opened position, arranged to be able to move between said auto-operated closed position to normally close said water passage for stopping said water flowing to said water outlet and said auto-operated opened position to open said water passage for allowing said water flowing to said water outlet for controlling said water flowing from said water inlet to said water outlet, wherein said valve stopper is moved away from an opening of said water passage to open said water passage for allowing said water flowing from said water inlet to said water outlet to start said flushing cycle of said flushing system; (c) adjustably controlling a volume of water used in said flushing cycle for said flushing system by controlling a time of said flushing cycle, wherein said flushing cycle of said flushing system is controlled by a control processor which is adapted to control said time of said flushing cycle and said water volume for each said flushing cycle; and (d) stopping water passing to said water outlet by closing said flush channel until said flushing cycle is started again, and moving said relief valve from said auto-operated opened position back to said auto-operated closed position to stop said water passing to said water outlet, wherein said volume of water used in each said flushing cycle for said flushing system is controlled through said control processor to control a driven speed of said actuator so that said volume of water used in each said flushing cycle is able to be adjustably controlled by controlling said driven speed of said actuator, that is a time said actuator driving said valve stopper to stay in said auto-operated opened position, thereby said water volume of each said flushing cycle is able to be increased when said control processor delays said driving time of said actuator.