Automatic vacuumizing system based on pulsation phenomenon, application and control method

The invention discloses an automatic vacuumizing system based on a pulsation phenomenon, an application and a control method. The automatic vacuum-pumping system comprises a drainage pump, a vacuum pump, a first drainage pipeline, a negative pressure sensor and a control system, wherein the vacuum pump is connected with the drainage pump through a vacuum-pumping pipeline; one end of the first drainage pipeline is connected with the drainage pump, the end, away from the drainage pump, of the first drainage pipeline extends into the water sump, and whether vacuumizing is completed or not is judged according to the frequency of the water pulsation phenomenon generated in the vacuumizing process of the first drainage pipeline; the negative pressure sensor is arranged on the first drainage pipeline and used for monitoring the vacuum value of the first drainage pipeline; and the negative pressure sensor and the vacuum pump are electrically connected with the control system. The automatic vacuumizing system judges w