Toilet bowl flushing system

Abstract

A toilet bowl flushing system according to the invention comprises a toilet bowl flushing device being installable in a low tank having a drain valve and capable of performing an operation of opening the drain valve; and a control unit that stores control information on a plurality of flushing modes, the control unit being capable of programming one of the plurality of flushing modes and supplying the toilet bowl flushing device with a control signal based on the programmed flushing mode. Such a toilet bowl flushing system can selectively use a plurality of flushing modes as appropriate to be adapted to various types of low tanks already on the market. The setting of the flushing mode, as well as the attaching angle of the toilet bowl flushing device, the distance from the output axle to the ball chain lever, the operation angle range of the ball chain lever, and the like can be appropriately varied. As a result, users can benefit from automatic flushing without replacing the low tank.

1 . A toilet bowl flushing system comprising: 
 a toilet bowl flushing device being installable in a low tank having a drain valve and capable of performing an operation of opening the drain valve; and    a control unit that stores control information on a plurality of flushing modes, the control unit being capable of programming one of the plurality of flushing modes and supplying the toilet bowl flushing device with a control signal based on the programmed flushing mode.    
   
   
       2 . A toilet bowl flushing system according to  claim 1 , wherein the control signal supplied from the control unit has a polarity being determined based on the programmed flushing mode.  
   
   
       3 . A toilet bowl flushing system according to  claim 1  or  2 , wherein the control signal supplied from the control unit has a pulse width being determined based on the programmed flushing mode.  
   
   
       4 . A toilet bowl flushing system according to any one of  claims 1  to  3 , wherein 
 at least one of the plurality of control modes includes control for maintaining the drain valve in an open state, and    the control signal for maintaining the drain valve in the open state includes a PWM signal.    
   
   
       5 . A toilet bowl flushing system according to any one of  claims 1  to  4 , wherein the toilet bowl flushing device includes: 
 a motor, and    deceleration means for decelerating an output of the motor, and wherein    the operation of opening the drain valve is enabled by a driving output from the deceleration means.    
   
   
       6 . A toilet bowl flushing system according to  claim 5 , wherein at least one of the plurality of control modes includes a first control of turning the drain valve into an open state by driving the motor and a second control of causing the drain valve to transition from the open state to a closed state while braking the motor.  
   
   
       7 . A toilet bowl flushing system according to  claim 5  or  6 , wherein 
 the toilet bowl flushing device includes a first output axle for output from the deceleration means and a second output axle for output from the deceleration means, and    the operation of opening the drain valve is enabled by at least one of the first and second output axles.    
   
   
       8 . A toilet bowl flushing system according to  claim 7 , wherein the first output axle and the second output axle have different deceleration ratios.  
   
   
       9 . A toilet bowl flushing system according to any one of  claims 1  to  8 , wherein the control unit is provided in a toilet seat.  
   
   
       10 . A toilet bowl flushing system according to  claim 9 , wherein the toilet seat further comprises a private parts flushing device for flushing user's private parts with water or warm water.