Patent ID: 6926068

Claim:
An air passage switching device for opening and closing at least one air passage, said air passage switching device comprising: a sliding door that slides in a sliding direction along an edge of an opening of the air passage, the edge of the opening being parallel to the sliding direction of the sliding door, the sliding door further comprising a film member that presses against the edge of the opening and a grill member, the grill member being parallel to the sliding direction at a center of the air passage, the sliding door including a door plate supporting the film member, the door plate having openings that allow a draft pressure to pass therethrough and act on the film member; and elastic pressing means disposed between the film member and the door plate that elastically presses the film member against the edge of the opening and the grill member; wherein a first spacing between the door plate and the grill member is equal to or greater than a second spacing between the edge of the opening and the door plate.