Profiled damper and fan for controlling air flow direction in an air duct

A device for controlling air flow in an air duct comprising a working machine in a form of a radial fan, placed in a profiled damper, the profiled damper rotatably mounted in the air duct on a fixed shaft;

• comprising
• two embossings forming two rotatable integral canopies, the canopies comprising a suction/inlet canopy and a compression/outlet canopy, wherein the canopies further comprising a suction port therebetween formed in a central opening, the canopies connected by flat ribs that extend outwardly from the canopies and towards a duct interior to form a sealing partition, wherein the canopies are arranged on opposite sides of the flat ribs and have a common axis of rotation coinciding with an axis of rotation of the profiled damper;
• wherein
• the canopies are interposed so that the suction port central opening is located in a plane perpendicular to the axis of rotation of the profiled damper;
• wherein
• the profiled damper obtains a drive from an actuator and rotates in relation to the air duct;
• wherein
• the radial fan, which continuously rotates in a fixed direction, is located in the compression/outlet canopy of the profiled damper, sucks in air from the suction/inlet canopy, through the suction port central opening, and into the compression/outlet canopy;
• wherein
• a control of the air flow direction in the air duct is obtained by rotatably reversing a position of the profiled damper such that the air flow changes direction;
• wherein
• the profiled damper flat ribs are symmetrical about the axis of rotation and comprise perimeter sealing edges;
• wherein
• the air duct comprises an inner frame, such that when the perimeter sealing edges come into contact with the inner frame, the duct is separated by tight seals into a first part and a second part which are exposed to different air pressures that permits an air stream within the duct air to reverse direction.