Automatic water replenishing system and method for cam pump vacuum unit

The invention relates to the technical field of vacuum drainage, and discloses an automatic water supplementing system and method for a cam pump vacuum unit, and the system comprises a dirt tank which is provided with a vacuum sensor; the cam pump is connected with the dirt tank through a dirt suction pipeline, the control box starts and closes the cam pump through feedback of the vacuum sensor so as to vacuumize the dirt tank and discharge dirt, and a cam pump cavity temperature sensor is arranged on the cam pump; the automatic water replenishing device comprises a water tank, the water tank is connected with the cam pump through a pipeline with a water tank water outlet electromagnetic valve, and the control box opens and closes the water tank water outlet electromagnetic valve through feedback of a cam pump cavity temperature sensor so as to automatically replenish water and cool a pump cavity of the cam pump; the cam pump is connected with the sewage tank through a pipeline and is used for discharging sew