Novel medium effeciency filter

The utility model discloses a novel medium effeciency filter, its structure is including a bag type filter screen, preprocessing device, interface, clamping device, the utility model discloses a novelmedium effeciency filter, through having set up preprocessing device, at first through first filter screen, the first filter screen of being made by the wire netting will filter big particulate matter in the time of air admission preprocessing device, and the second filter screen made by active carbon and the nylon materials harmful gas in will adsorption of air with air purification, has solvedthe problem that can't carry out a preliminary treatment function to bag type filter screen, through having set up clamping device, when docking with the rectangle air hose, the rotation through the hinge will strut splint, then the effect through first spring and second spring increases the frictional force to the rectangle air hose through the barb with rectangle air hose cliping tightly again,has solved the problem that