A heat exchange cell is described comprising a containment casing (11) comprising a rear wall (11d), a front wall (22) and a peripheral side wall (11c), a helically-shaped heat exchanger (13) comprising at least one tubular duct for the flow of a first heat transfer fluid coiled about a longitudinal axis of the helix according to a plurality of coils and mounted in the containment casing (11); a feeding zone of a second heat transfer fluid, intended for the heat exchange with the first heat transfer fluid, defined in the casing (11) coaxially and internally with respect to the heat exchanger (13); a first chamber (15) for collecting the second heat transfer fluid externally defined with respect to the heat exchanger (13) between a radially outer wall thereof and the peripheral side wall (11c) of the containment casing (11); and a second chamber (16) for collecting the second heat transfer fluid at least partially delimited by at least one separating element (14). The separating element (14) is mounted at an axially external position with respect to the heat exchanger (13) in such a way as to define the second chamber (16) for collecting the second heat transfer fluid between the separating element (14), the peripheral side wall (11c) and the rear wall (11d) or the front wall (22) of the containment casing (11); in this way, the first (15) and the second (16) collection chambers are in fluid communication with each other by means of at least one passage (17a, 17a, 17b-17g; 14e) configured to allow a flow of the second heat transfer fluid substantially in parallel to the peripheral side wall (11c) of the casing (11) and in proximity thereto. The separating element (14) comprises a heat exchange portion in contact with at least one portion of an end coil of the heat exchanger (13) and configured to allow a heat exchange between the coil-shaped portion of the heat exchanger (13) and the second collection chamber (16), while the heat exchange cell (10) further comprises at least one second passage (35) allowing a fluid outlet from the second collection chamber (16) peripherally defined in the second chamber (16) between an axial end (11g) of the peripheral side wall (11c) and the rear wall (11d) or the front wall (22) of the containment casing (11).

A complex heat exchanger capable of working in different air conditioning modes by controlling flow of coolant in a refrigerant-coolant secondary loop system linked with a primary loop of refrigerant circulation. The heat exchanger is capable to perform heating or cooling operation with the flowing coolant being heated or cooled by the refrigerant, while two heat exchanger cores are disposed in parallel, and a path regulating manifold is provided to connect inlet and discharge ports to allow the coolant to flow sequentially or independently through two heat exchangers. In cooling or heating mode, coolant flows sequentially through two heat exchangers to maximize the heat exchange efficiency. In a dehumidifying mode, the low-temperature coolant and the high-temperature coolant respectively flow through the two heat exchangers independently to smoothly implement the dehumidification. Therefore, the single complex heat exchanger can perform the heating, cooling, and dehumidifying operations with maximum efficiency.

A complex heat exchanger capable of working in different air conditioning modes by controlling flow of coolant in a refrigerant-coolant secondary loop system linked with a primary loop of refrigerant circulation. The heat exchanger is capable to perform heating or cooling operation with the flowing coolant being heated or cooled by the refrigerant, while two heat exchanger cores are disposed in parallel, and a path regulating manifold is provided to connect inlet and discharge ports to allow the coolant to flow sequentially or independently through two heat exchangers. In cooling or heating mode, coolant flows sequentially through two heat exchangers to maximize the heat exchange efficiency. In a dehumidifying mode, the low-temperature coolant and the high-temperature coolant respectively flow through the two heat exchangers independently to smoothly implement the dehumidification. Therefore, the single complex heat exchanger can perform the heating, cooling, and dehumidifying operations with maximum efficiency.