FILTER MEMBER FOR TREATING INDOOR AIR

摘要

PROBLEM TO BE SOLVED: To make a filter element freely exchangable and to mount it without requiring a special attention and making a mistake on the front and the back of a filter material when the filter element is mounted in a frame body as a filter member for cleaning indoor air of an automobile, etc. SOLUTION: A rectangular frame body 11 made of a synthetic resin provides inward brims 11b on the lower side of side walls 11a and a plurality of right- angled triangle projections 11c which have each a base side of the inward brim side and the hypotenuse inclined therefrom so as to open upward of the frame body 11 on the insides of the side walls 11a of both ends and trapezoidal side plates 12b in which both end faces incline in accordance with the hypotenuse of the projection 11c in the frame body 11 and the surface side with a rough fiber texture of a filter material is a long side and the back side with a dense fiber texture is a short side are fixed on both sides of a corrugated filter medium 12a to prepare a filter element 12 and the end faces of the side plates 12b are brought into contact with the inclined faces of the projections 11c to insert the element 12 into the frame body 11 and a lid frame 13 is applied thereon.