Drum-type air filter element

The utility model discloses a drum-type air filter element which comprises an annular filter layer and support frameworks, wherein the support frameworks are symmetrically distributed at two ends of the annular filter layer; a drainage crystalline silicon dioxide molecular sieve ring is further arranged between the support frameworks; the support framework located at the inlet end is connected with a high-water-absorbing resin cup with U-shaped section in a plug-in manner, a cup edge with L-shaped section is arranged on the outer surface of the opening part of the high-water-absorbing resin cup and is connected with the lower surface of the support framework located at the inlet end in a buckling manner, and a stainless steel net rack is arranged in the high-water-absorbing resin cup; the support framework located on the opposite side of the inlet end is connected with a sealing column which cannot be penetrated by gas in a plug-in manner, a first cylindrical bulge is arranged on the upper surface of the sealing column, a tubular bulge is arranged on the lower surface of the sealing column, a hollow sphere is fixedly connected below the tubular bulge, breather holes are uniformly distributed in the outer surface of the sphere which is filled with volatile sterilizing and odor removing solid particles, a first counter bore is formed in the main surface of the first cylindrical bulge, the lower part of the first counter bore is communicated with the upper part of the tubular bulge, and a sealing block is connected in the first counter bore in a buckling manner. The integral design is novel, the capacity is high and the service life is long.