Air pipe for fan

The utility model relates to the technical field of fans, in particular to an air pipe for a fan, which comprises a fan body, a circular groove is arranged on the side wall of the fan body, arc-shaped strips are symmetrically and fixedly mounted in the inner wall of the circular groove, column grooves are symmetrically arranged on the side wall of the fan body, the two column grooves are respectively positioned on two sides of the circular groove, and limiting grooves are arranged inside the two column grooves. The filtering mechanism comprises a filter screen body, the filter screen body is arranged in the first annular groove, a second annular groove is formed in the side wall of the filter screen body, sliding grooves are symmetrically formed in the inner wall of the second annular groove, springs are symmetrically and fixedly installed in the inner wall of the second annular groove, and the sliding grooves are communicated with the sliding grooves. Arc-shaped limiting strips are fixedly mounted on the sid