Self-cleaning negative-pressure ejector

A self-cleaning negative-pressure ejector comprising:

• a suction chamber, a side wall of the suction chamber having at least one suction port, the suction port being used for communicating with a first fluid pipeline;
• a jet pipe, an exit port of the jet pipe being disposed in the suction chamber and ejecting a second fluid so that a negative pressure being generated in the suction chamber, and a first fluid in the first fluid pipeline entering the suction chamber, wherein a first included angle is between a direction in which the first fluid being sucked into the suction chamber and an ejection direction of the second fluid;
• and
• at least one flushing member used for continuously providing a third fluid to clean the suction chamber and the first fluid pipeline to generate a fixed flushing pressure or intermittently providing the third fluid to clean the suction chamber and the first fluid pipeline to generate a pulsed flushing pressure according to a numerical value of the negative pressure, a time setting or a frequency setting for removing solid particles deposited in the suction chamber and the first fluid pipeline, wherein the suction chamber has a bottom plate rotatably disposed on a bottom of the suction chamber, and at least one fin is disposed on the bottom plate for removing solid particles deposited in the suction chamber and the first fluid pipeline during the rotation of the fin.