| 摘要 |
A vertically operating door includes a flexible panel comprising two pliable sheets of material with a layer of thermal insulation between the two. The door includes means for preventing or relieving undesirable air pressure conditions inside the panel. In some cases, a hose from a suction inlet of a blower extends into the space between the two sheets so that when the door is closed with the bottom of the panel resting upon the floor, the blower draws out excess air that happens to leak into the hollow interior of the panel. In other cases, air passageways are created to release or redistribute the excess air inside the panel. The door includes an inflatable seal that helps prevent frost from forming on the door panel's vertical guide tracks, thus the door is particularly suited for refrigerated cold storage rooms.
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