AIR INFILTRATION PREVENTION STRUCTURE OF WIND-INDUCED VENTILATION STRUCTURED GREENHOUSE

PROBLEM TO BE SOLVED: To provide an air infiltration prevention structure which prevents generation of air infiltration caused by a contact or adhesion failure generated between a shutoff sheet and edges of a vent opening when the vent opening is closed with the shutoff sheet or a door frame or window frame, thereby increasing the thermal efficiency of a greenhouse or preventing in advance a harmful effect such as stunted growth of crops by the air infiltration.SOLUTION: Pneumatic tubes 10a, 10b are installed along edges of a vent opening 1 formed on a greenhouse, or oppositely, on a face part in contact with the edges of the vent opening 1A, 1B, 1C at a periphery of a window frame 50, 60 or door frame 40 for opening and closing the vent opening 1. Further, an electric fan is installed which takes and blows air into the pneumatic tubes to inflate the tubes. In a state of the inflated pneumatic tube, a shutoff sheet 4 or the window/door frame manipulated to be a closed state and the vent opening are in close contact via the pneumatic tubes to prevent generation of gaps. 【課題】換気用開口部を遮断シート又は扉枠や窓枠で閉鎖した際に、遮断シートと換気用開口部の口縁部との間に発生する、接触又は密着不良によるすきま風の発生を防止して、温室の熱効率を高め、或いはすきま風による作物の発育不良などの弊害を未然に防ぐ、すきま風防止構造を提供する。【解決手段】温室に形成された通風開口部１の口縁部に沿って、又は逆に前記通風開口部１を開閉する窓枠５０、６０若しくは扉枠４０の周辺部であってその通風開口部１Ａ、１Ｂ、１Ｃの口縁へ接する面部に空気封入チューブ１０ａ、１０ｂが設置され、更に空気を取り込んで前記空気封入チューブ内へ吹き込み、同チューブを膨張させる電動ファンが設置されており、空気封入チューブを膨張させた状態で、閉鎖状態に操作した遮断シート４又は窓枠、扉枠と前記通風開口部とを前記空気封入チューブを仲介として密接させ隙間の発生を防ぐ構成とした。【選択図】図２