Vacuum breaking self-cleaning automatic drainage system

The utility model relates to the technical field of vacuum system condensate water drainage control, in particular to a vacuum breaking self-cleaning automatic drainage system which comprises a vacuum air storage tank, a condensate water storage device, a PLC (programmable logic controller) control unit, a liquid level meter, a pipe fitting group and an electromagnetic valve group. The electromagnetic valve group is arranged on the pipe fitting group, and the PLC control unit is electrically connected with the liquid level meter and the electromagnetic valve group. Condensate water discharged by the vacuum air storage tank is stored through the condensate water storage device, tap water, high-pressure air and normal-pressure air are connected from the outside through the pipe fitting set, the condensate water is discharged through the pipe fitting set, liquid level information is collected through the liquid level meter and output to the PLC control unit to control the electromagnetic valve set to be opened a