| 摘要 |
PURPOSE:To control the entry of polluted air into a building by a structure wherein an air shower, which jets circulating air in forms of high speed air streams into a passage space formed between an outside door and an inside door at a gate way for persons or objects in a pressurized and air-conditioned building, is provided. CONSTITUTION:A return air taken in from a passage space 33 through suction ports 42 in a double wall space is removed coarse particles and noxious gas therefrom at prefilters 44, led to an attic space, sent respectively to filter units 36 and 36' by means of blowers 34 and 34' so as to be caught fine particles, and then supplied through air supply ducts 43 to respective blow-off openings 35 in order to be blown-off in forms of air jets. Consequently, pollutants adhered to human body or object are blown-away by being air-showered. The air-showered pulluted air is sucked again through the suction ports 42 in order to be circulated. In such a manner as mentioned above, the pollutants accompanied with human body or object, which enters the building through the passage space, are removed. |
