Automatic pollution discharge aspirator

The utility model discloses an auto-discharge aspirator, which comprises a vacuum pump, a soiling solution bottle and a control circuit, wherein the soiling solution bottle is connected on the vacuum pump through a negative-pressure air pipe. The utility model is characterized by further comprising a weight sensor for measuring soiling solution volume in the soiling solution bottle, an electric ball valve and a peristaltic pump. The soiling solution bottle is connected with the electric ball valve and the peristaltic pump in turn through a drainage pipe, the weight sensor is arranged under the soiling solution bottle and is connected with a single-receiving input end of a control circuit, which controls the aspirator to achieve attraction and automatic drainage. The auto-discharge aspirator is always in a useable state, which reduces frequent mounting, dismounting and pouring to the soiling solution bottle, greatly improves the working efficiency, guarantees the cleaning and the sanitation of surrounding work