(2) Online pump vacuum holding toilet system: When the control box detects that the pressure in the pipeline is lower than the low pressure set value, the system will start the vacuum pump and the vacuum degree in the pipeline will increase. When the high pressure setting value is reached, the vacuum pump stops working. At this time, the pipeline maintains the set negative pressure. After the system gives a flushing signal, it will automatically flush the toilet and open the vacuum discharge valve. The dirt will be sucked into the vacuum pipeline under the negative pressure of the pipeline until it is discharged into the urban pipeline network. Then, the vacuum discharge valve closes and waits for the next flushing. The greywater from urinals, washbasins, etc. flows into the greywater tank by gravity. When the amount of stored grey water in the grey water tank reaches a certain level, the valve is opened and the negative pressure in the pipeline is used to draw it into the vacuum pipeline. The vacuum pipeline will reduce the vacuum degree due to the suction of dirt. When it reaches the set value, the system will restart the vacuum pump to increase the vacuum degree of the pipeline and wait for the next system flushing.
