Air curtain - air curtain

Equipment that keeps the entrance to a building open to allow people and objects to pass freely, while blocking the entry and exit of air and insects as much as possible. Air is blown out from a long, narrow opening at the top or side of the entrance, and sucked in from an opening in the floor or on another side. It is also called an air door because the entrance surface is covered with moving air. Recently, types that only have an outlet have become popular. They are often used in the entrances of department stores, shops, factories, and freezers where there is a lot of foot traffic. For entrances and exits for people, it is preferable to blow out conditioned air.

[Masao Ishihara]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

建物の出入口を開けたまま人や物を自由に通す一方、空気や昆虫の出入りをできるだけ遮断しようとする設備。出入口の上部または側面の細長い開口から空気を吹き出し、床面または他の側面の開口から吸い込む。出入口面が流動空気で覆われるのでエアドアともいう。最近は吹出し口だけをもつタイプが普及している。人の出入りの多い百貨店や商店、工場や冷凍室の出入口によく用いられている。人の出入口の場合は空調した空気を吹き出すことが望ましい。

［石原正雄］

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