How does the automatic flushing toilet work?

The toilet consists of the following main parts: water inlet pipe, water outlet pipe, water seepage pipe, water plug (water inlet and water outlet), floating ball, drainage knob and lever, water replenishing mechanism, water tank and urinal (the urinal has an elbow connected with the water tank).

Its working principle is to control water discharge and water storage by using water discharge knob and water plug. When in use, the water discharge knob is rotated, and the water plug is pulled up by the metal rope or nylon rope connected with the water plug, and the water plug is pulled out of the water outlet pipe. The outlet pipe puts the water into the urinal, and uses the kinetic energy converted from the gravity and potential energy of the water to flush the discharged sewage into the sewer pipe. At the same time, when the water level drops to a certain extent, the negative pressure generated by the gravity of water will re-press the water plug into the water outlet pipe and block the water outlet, and there will be no water at this time. When the water level drops to flush the urinal, due to the drop of the water level, the gravity of the floating ball drives the floating ball and the lever, that is, the water replenishing mechanism opens and starts to replenish water synchronously; In the replenishment stage, the buoyancy and lever of the floating ball are used to control the replenishment of the water tank. When the floating ball descends to the lowest position, the water plug is pressed into the outlet of the pressure outlet pipe by negative pressure, and the water tank begins to store water. The water inlet pipe is connected with the tap water pipe and is responsible for the input of water source. When the water supply reaches a certain height, the buoyancy of the water lifts the floating ball, closes the water supply mechanism and stops the water supply.

When the water inlet pipe leaks due to a fault (for example, the water inlet plug cannot block the water inlet or the water inlet pipe is broken), the water level in the water tank will continue to rise and eventually overflow the water tank. The installation of seepage pipe solved this problem. When the water level rises to the seepage pipe, water will flow into the toilet from the seepage pipe, and water will not overflow the water tank. When the water inlet pipe works normally, the water level in the water tank will not reach the seepage nozzle, so there is no need to worry about the water flowing away.