PROBLEM TO BE SOLVED: To provide a photocatalyst filter unit that allows a photocatalyst filter to be fitted into a casing using without requiring an additional part while maintaining a desired pleat shape and facilitates the work of replacing the filter.SOLUTION: A photocatalyst filter unit comprises a frameless pleated photocatalyst filter 3 and a casing 2. The photocatalyst filter 3 includes pleats 3c arranged at predetermined pitches along a pleat forming direction and has groove parts 3b each formed between the pleats 3c. The casing 2 has a body part (a lower member 20 and an intermediate member 30) to which the filter 3 is locked at the time of fitting of the filter 3 and a fixing member (a cover member 40) that fixes the filter 3 having been fixed to the body part. The body part or the fixing member is formed with a group of projections (claws 22c) that prevent the pleats 3c from being shifted from desired positions with exceeding a predetermined limit. Each protrusion (claw 22c) is engaged with a corresponding groove part for each of a plurality of pleat pitches on one of the sides of the filter 3.SELECTED DRAWING: Figure 10COPYRIGHT: (C)2016,JPO&INPIT【課題】 光触媒フィルタのみでケーシングに所望プリーツ形状を保ちながら装着可能で、同フィルタの交換作業も容易である光触媒フィルタ・ユニットを提供する。【解決手段】 無枠のプリーツ形光触媒フィルタ3とケーシング2を備える。光触媒フィルタ3は、プリーツ形成方向に沿って所定ピッチで配置されたプリーツ3cを有し、プリーツ3c間に形成された溝部3bを持つ。ケーシング2は、フィルタ3の装着時にフィルタ3が係止される本体部(下位部材20と中間部材30)と、本体部に係止されたフィルタ3を固定する固定部材(カバー部材40)を持つ。本体部または固定部材に、フィルタ3の装着時にプリーツ3cが所望位置から所定限度を超えてずれないようにする突起群(爪22c)を形成する。各突起(爪22c)は、フィルタ3のいずれか一方の側で、対応する溝部3bに複数プリーツピッチ毎に係合される。【選択図】 図10
