BACKWASHING FILTERING DEVICE

摘要

A backwashing filtering device comprises a housing (11) provided with a liquid input port (111), a liquid output port (112) and a pollutant discharge port (113), the liquid input port (111) being provided with a first pressure measuring device (141) and a first electromagnetic valve, the liquid output port (112) being provided with a second pressure measuring device (142), and the pollutant discharge port (113) being provided with a second electromagnetic valve; a filtering screen (12) disposed in the housing (11), a liquid input area (15) being formed between the filtering screen (12) and an inner wall in the housing (11), the liquid input port (111) and the pollutant discharge port (113) both being in communication with the liquid input area (15), and the liquid output port (112) being in communication with the inside of the filtering screen (12); an ultrasonic generation device (13), comprising a drive module (131) connected to the first pressure measuring device (141), the second pressure measuring device (142), the first electromagnetic valve and the second electromagnetic valve, a control module (132) and an ultrasonic generator (133) both connected to the drive module (131), and an ultrasonic transducer (134) connected to the ultrasonic generator (133) and extending into a cavity of the housing (11).