Forced convection heat exchanger for a refrigeration appliance

A heat exchanger (1) for a refrigeration appliance and condensing a refrigerant fluid through refrigerant flow tube (2) in mini-channel structure and in serpentine form where the refrigerant flow is provided, said heat exchanger (1) being disposed against a fan (3) structurally integrally provided to effect forced heat convection for cooling said refrigerant flow tube (2) by blowing air thereon, characterized in that—two upright elements (4) are provided to carry and support said refrigerant flow tubes (2) such that linear arms thereof are fitted into mounting slits (7) on each upright element (4),—accordion-like fins (8) in compressed form are provided to fit into rectangular openings delimited by two opposite upright elements (4) at both sides and by two arms of the serpentine-form refrigerant flow tubes (2) from above and below in contact therewith,—a locking means (9) is secured to upper parts of the two upright elements (4) so as to keep the distance thereinbetween constant and avoid the same moving away from each other.