Ventilator with heat exchanger

Claim 1

A ventilator with heat exchanger in the form of a rotating drum-like fan and a housing which is externally closed and has at least one inlet opening on the suction side and at least one outlet opening on the pressure side, and separation walls between the suction side and the pressure side, characterized in that the housing comprises a scroll and two end plates, which scroll is divided by a first separation wall, extending parallel to the end plates, between the suction side and the pressure side and at a distance from the end plates, and having a central opening with a diameter which approximates the internal diameter of the exchanger and receives a fixed, hollow and conical member which with its open end with the greater diameter extends upwards into the central hollow of the exchanger, and the other end of which with its smaller diameter is tightly connected to a second separation wall between two groups of inlets on that side of the first separation wall which does not receive the exchanger, which second separation wall extends upwards over the first separation wall, along opposite sides of the external wall of the conical member and forms a first pair of lips against the internal side of the exchanger, which lips extend to the same side of the second separation wall, and on the pressure side of the first separation wall are formed a second pair of lips which from opposite sides of the internal wall of the scroll extend tangentially against the external side of the exchanger, which second pair of lips extend against the rotational direction of the exchanger, such that one lip of the first pair and one lip of the second pair are facing each other diametrically and the second lip of the first pair and the second lip of the second pair are displaced in the rotational direction of the exchanger from the internal side of the exchanger to the external side thereof.