Abstract: An air flow controlling device for refrigerators and freezers, comprising an evaporator (3) in selective fluid communication with at least two air flow heating environments (1, 2, 4), said device comprising an inlet nozzle (12) in fluid communication with a respective airflow heating environment (1, 2, 4), and an outlet nozzle (13) in fluid communication with the evaporator (3), and a respective obturator (20), which is operatively associated with the inlet and outlet nozzles (12, 13) and displaceable between opening and closing positions, respectively permitting and blocking the fluid communication between said inlet and outlet nozzles (12, 13).

Abstract: A heat exchanger of the fin type with a forced air flow, comprising: a thermal exchange tube (10) having a plurality of mutually parallel rectilinear portions (11); and a plurality of flat fins (20), which are parallel to the direction of the forced air flow, spaced apart from each other and provided with openings (21) for the passage of said rectilinear portions (11), a pair of air flow deflectors (30) being provided downstream at least part of said rectilinear portions (11), each flat fin (20) having, from one of the faces thereof and laterally to the openings (21), alignments of fin projections (22) associated with respective fin windows (23) for the passage of the deflected forced air flow.