Patent ID: 8764526

Claim:
An air duct system for rail passenger traffic vehicles, comprising: a roof venting duct having a first component venting duct for warm air; a second component venting duct for cold air; a separating device arranged inside the roof venting duct between the first and second component venting ducts, wherein the separating device is a linearly movable and rigid plate-shaped device so that one of the first or second component venting ducts is enlargeable by making the first and second other component venting duct smaller, wherein slidable movement of the plate-shaped structure and the resulting changes in cross section are brought about solely by the air pressure and volume flow condition within the roof venting duct without external energy; and a plurality of adjustable flaps positioned at an inlet of the first component venting duct for warm air and at an inlet of the second component venting duct for cold air, wherein the adjustable flaps are switchable between a first position in which air is configured to pass into both of the the first or second component venting ducts, and a second position in which air is configured to pass into one component venting duct and the adjustable flaps are configured to prevent the passage of air into the other first or second component venting duct.