Heat exchanger type fan

The present invention refers to heat exchange devices and intended for use in ventilation and air conditioning systems where the heat carriers do not mix with one another. The invention applied comprises a casing and an impeller of double-sided centrifugal fan with heat exchange taking place via said impeller. The blades could be made of specified curvature. In particular, blade curvature could be specified so that a constant width of the inter-blade channel is ensured, which would raise the efficiency of heat exchange. Another embodiment of the device comprises a two-sided impeller in the form of a dividing disk with centrifugal fan blades made on one side of said impeller and centripetal fan blades made on its other side, which arrangement would provide for the counter-flow heat exchange. Also, the impeller can be made in the form of dividing disk with centrifugal fan blades made on one side of said impeller and centripetal turbine blades made on its other side, which arrangement would additionally provide for the two-stage heat exchange process. With that both stages are mounted co-axially with impeller shrouds of turbines facing one another, while the blower outlets of centrifugal fans of one stage are made so that they are connected to inlets of turbines of another stage. In this case centrifugal fan of one stage forces the stream of one of the heat carriers into the turbine of another stage. The transfer of the other heat carrier will proceed in the opposite direction.