Air filter

The invention discloses an air filter. The air filter comprises an air pipeline and a filter element; the filter element is arranged between an air inlet and an air outlet of the air pipeline; the filter element is full of the cross section of the whole air pipeline; the filter element consists of a plurality of dust adsorbing bodies which are stacked in one filter element supporting frame; and gap exists when the dust adsorbing bodies are stacked. The dust adsorbing bodies are spheres with certain surface roughness or irregular spheres with surfaces with concave or convex parts. The air is filtered by the novel dust adsorbing bodies, so that the constraint of the existing flat filter net structure is broken; and the filter is simple in structure and easy to manufacture. The dust adsorbingbodies adsorb dust by utilizing the surface roughness, and the air flows in the gap among the dust adsorbing bodies, so the air filter has good filtering effect and is not liable to blockage, and themaintenance and cleaning