Air filter self-cleaning control method and air filter self-cleaning control device

Abstract

The invention provides an air filter self-cleaning control method and an air filter self-cleaning control device. According to the method, the pressure difference between the exterior of a filtering cylinder and the pipe opening of a clean air outlet pipe is obtained; whether the pressure difference is smaller than an abnormal threshold value is judged; if the pressure difference is smaller than the abnormal threshold value, diaphragm electromagnetic valves are sequentially opened according to a preset first cleaning period, and blowback gas source spraying nozzles are controlled by the openeddiaphragm electromagnetic valves to clean each filtering cylinder; if the pressure difference is not smaller than the abnormal threshold value, whether the pressure difference is between an alarm threshold value and a limit threshold value is judged; and if the pressure difference is between the alarm threshold value and the limit threshold value, the diaphragm electromagnetic valves are simultaneously opened according to a preset second cleaning period, and the blowback gas source spraying nozzles are controlled by the opened diaphragm electromagnetic valves to clean each filtering cylinder.According to the method provided by the invention, the filtering cylinder corresponding to the opened diaphragm electromagnetic valves are cleaned, and the filtering cylinder corresponding to other non-opened diaphragm electromagnetic valves can normally filter dust-containing air, so that the problem that the filtering of the dust-containing air must be stopped in a filtering cylinder cleaning process in the prior art is solved.

Description

technical field [0001] The present application relates to the technical field of automatic control, in particular to an air filter self-cleaning control method and device. Background technique [0002] As a device for compressing air, air compressors are widely used in industrial fields. If the air entering the air compressor contains dust, it is easy to cause wear and tear on the air compressor. The service life of the machine is reduced. In addition, the harmful chemical components in the dust can easily cause the air compressor to rust or corrode. Therefore, the air needs to be filtered before entering the air compressor for compression. [0003] The existing equipment for filtering air is usually an air filter, refer to figure 1 As shown in the structural diagram, the air filter includes: coarse filter 1, differential pressure controller 2, differential pressure alarm 3, PLC automatic control unit 4, electric control box 5, air storage tank 6, diaphragm solenoid valv...

AI Technical Summary

Problems solved by technology

[0006] This application provides an air filter self-cleaning control method and device to solve the problem that the filtering of dusty air must be terminated during the process of cleaning the filter cartridge

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