VENTILATION DEVICE

To solve the problems in which, in a conventional ventilation device for window mounting, the size a little larger than a body outside part was necessary as a mounting hole and there was a problem about securing airtightness, and in which there was a problem about workability as a product body had to be inserted while being inclined.SOLUTION: A ventilation device which is installed at an opening provided on a side wall and which performs ventilation between an outer space and an internal space includes: a housing having a cylindrical shape including a hollow space inside, and for penetrating the opening partially; an air blowing part arranged in the hollow space and for performing air blowing between the outer space and the internal space; a fall prevention part positioned on the internal space side, and positioned further on the outer peripheral side than the opening; and an outside fixing part positioned on the outer space side, and positioned further on the outer peripheral side than the opening. The housing includes a through-hole for allowing the outside fixing part to penetrate. The outside fixing part includes: a base part positioned inside the hollow space; and a locking part positioned further on the outer peripheral side than the housing via the through-hole, and for holding the side wall positioned on a peripheral edge of the opening between itself and the fall prevention part.SELECTED DRAWING: Figure 1 【課題】従来の窓取付用の換気装置においては、取付孔として本体外部よりも少し大きいサイズが必要であり、気密性の確保に問題があった。また、製品本体を傾けながら挿入する必要があり、施工性にも課題があった。【解決手段】側壁に設けられた開口に設置され外部空間と内部空間との間で換気を行う換気装置であって、内側に中空空間を備えた筒形状を有し、開口を部分的に貫通する筐体と、中空空間に配置されて外部空間と内部空間との間で送風を行う送風部と、内部空間側に位置して開口よりも外周側に位置する脱落防止部と、外部空間側に位置して開口よりも外周側に位置する外側固定部と、を備え、筐体は、外側固定部を貫通させるための貫通孔を備え、外側固定部は、中空空間の内部に位置する基部と、貫通孔を介して筐体よりも外周側に位置して脱落防止部との間で開口の周縁に位置する側壁を挟持する係止部と、を備えた換気装置を提供する。【選択図】図１