Patent ID: 7059385

Claim:
An air conditioning device comprising exactly two separate recovery cells ( 1 , 2 ), an inlet duct ( 3 ) and an exhaust duct ( 4 ) leading to and from a room at a first end of the device, an inlet duct ( 5 ) and an exhaust duct ( 6 ) located at a second end of the device and leading from and to the outdoor air, the air flows in the air conditioning device being controlled by means of a first deflector ( 7 ) located at the first end of the device and a second deflector ( 8 ) located at the second end of the device, characterised in that the first deflector has first and second air openings ( 11 ) and the second deflector has first and second air openings ( 12 ), and further wherein the device has axes ( 9 , 10 ) for controllably rotating the deflectors so that the first air openings of each deflector are aligned with each other and that the second air openings of each deflector are aligned with each other as the deflectors are periodically rotated a given angular displacement so that the direction of air flow in each recovery cell ( 1 , 2 ) is alternately reversed and so that the air flow from the room to the outside and the air flow from the outside to the room each alternately use different cells ( 1 , 2 ).