Lavatory hopper flushing apparatus

DETAILED DESCRIPTION Accordingly, the present invention has been made to achieve the following objects.
It is a first object of the present invention to provide a lavatory hopper flushing apparatus which flushes all the lavatory hoppers of a group simultaneously with water when the number of times of the use of the lavatory hoppers of the group reaches a predetermined number.
It is a second object of the present invention to provide a lavatory hopper flushing apparatus which flushes all the lavatory hoppers of a group simultaneously with water when the number of times of the use of the lavatory hoppers of the group reaches a predetermined number and also flushes all the lavatory hoppers of the group simultaneously with water after a predetermined interval from the first use of any one of the lavatory hoppers of the group even if the number of times of the use of the lavatory hoppers of the group is less than the predetermined number at the termination of the predetermined interval.
It is a third object of the present invention to provide a lavatory hopper flushing apparatus which flushes all the lavatory hoppers of a group simultaneously with water when the number of times of the use of the lavatory hoppers of the group reaches a predetermined number, flushes all the lavatory hopeps of the group simultaneously with water after a predetermined interval from the first use of any one of the lavatory hoppers of the group even if the number of times of the use of the lavatory hoppers of the group is less than the predetermined number at the termination of the predetermined interval and supplies water to the lavatory hoppers of the group when any one of the lavatory hoppers of the group is not used for an extended period of time, to prevent the exhaustion of the sealing water due to evaporation.
The first object is achieved by providing the control unit which is actuated on the basis of a detection signal given by the sensor unit to derive the water supply unit with a counter control unit which has a counting circuit capable of counting the detection signals and provides an output signal when the number of the detection signals reaches a predetermined number, and an output control unit which provides an output signal to actuate the water supply unit upon the reception of the output signal given by the counter control circuit