Abstract: A device for controlling air flow in an air duct comprises a rotary, profiled damper, a fan or turbine, and an actuator. The profiled damper comprises two rotatable integral canopies, a central opening therebetween, flat ribs extending outwardly from the canopies and towards an interior of the air duct, wherein an axis of rotation of said canopies coincides with an axis of rotation of the profiled damper and the canopies are arranged on the opposite sides of the profiled damper. The profiled damper is characterized in that the actuator is configured to reverse a position of the profiled damper, thereby reversing a direction of an air stream generated by the fan or turbine.

Abstract: The device to control air flow direction in the air duct according to the invention, which has an air duct and is provided with a working machine in the form of a fan or turbine, is characterized by a working machine that is located in the profiled damper (3). This is a profiled single plane rotary baffle, in which there is a central hole and two embossings forming two canopies: the suction/inlet canopy (3a) and the compression/outlet canopy (3b), arranged in such a way that they are located on opposite sides of the plane of the baffle, while the canopies (3a), (3b) have the shape of the rotary bodies with a common axis of rotation coinciding with the axis of rotation of the profiled damper (3), and are so interposed that the central hole is in the plane perpendicular to the plane of the profiled damper (3), and perpendicular to the axis of rotation of the profiled damper (3).