Abstract: The unit comprises two similar heat exchangers (2.1, 2.2) included in the thermodynamic medium circuit through an inlet collectors (7.1, 7.2) and outlet collectors (8.1, 8.2), wherein the inlet collectors (7.1, 7.2) are connected with the outlet collectors (8.1, 8.2) through the perpendicular tubular flow channels (5.1, 5.2), wherein final sections (10.1, 10.2) of the flow channel connections (5.1, 5.2) to the outlet collector (8.1, 8.2) are bent off the plate of the radiator (4) common for both exchangers (2.1, 2.2) by a dimension (e) greater that half the sum of the outside diameters of the inlet (7.1, 7.2) and outlet collector (8.1, 8.2), wherein the tubular nozzle distributors, having many nozzle orifices on the side, directed coaxially to the flow channels (5.1, 5.2), are introduced to the inside of the inlet collectors (7.1, 7.2), wherein the diameters of the nozzle orifices increase successively from the end of the thermodynamic medium supply.

Abstract: The device comprises a closed, a heat-insulated storage tank with a water reservoir embedded inside, wherein a plurality of inner chambers are separated by horizontally mounted and spaced apart units with tubular heat exchangers, wherein each unit comprises two similar heat exchangers included in parallel the thermodynamic medium circuit through the inlet collectors (7.1) and the outlet collectors (8.2), wherein the inlet collectors (7.1) are connected with the outlet collectors (8.2) through the perpendicular tubular flow channels (5.1), wherein final sections (10.2) of the flow channel connections (5.2) to the outlet collector (8.2) are bent off the plate of the radiator (4) common for both exchangers by a dimension (e) greater than half the sum of the outside diameters of the inlet (7.1) and outlet collector (8.2), wherein the tubular nozzle distributors (11), having many nozzle orifices on the side, directed coaxially to the flow channels (5.1), are introduced to the inside of the inlet collectors (7.1).