Patent ID: 8171578

Claim:
A water discharge system comprising: a spout that discharges water; a sensor unit configured to radiate an electric wave and receive a reflected wave of the electric wave reflected by an object so as to acquire information about movement of the object, a control unit which controls a valve based on the information acquired by the sensor unit, wherein when the valve is open, the water is discharged from the spout; wherein the sensor unit is configured to radiate the electric wave such that a detectable area of the sensor unit is formed around trace of discharge flow of the water discharge from the spout, wherein the control unit comprises: a determination unit configured to determine whether a velocity of the object is a velocity just before stopping, if the object is approaching the trace of discharge flow of the water while decelerating and then stops on the trace of discharge flow, wherein when the determination unit determines that the velocity of the object is the velocity just before stopping, the control unit opens the valve so that the spout can discharge water just before or at the same time the object reaches the trace of discharge flow of the water.