Regularly check whether the filter inlet air surface is blocked by debris and whether the filter material surface is damaged; If there are objects blocking the surface, remove them; If the surface of the filter material is seriously damaged, it is necessary to replace the new filter material or replace the new filter and reinstall it; When the filter is installed, it is necessary to ensure that the seal is good at the press edge of the frame to prevent air leakage; Do not use heavy objects to impact the surface of the filter, do not force to pull the filter material surface of the filter; When installing, the length direction of the filter bag mouth should be perpendicular to the ground to ensure the filtration effect of the air supply and increase the service life.