Abstract: A reversible heat pump device (100) is described by means of an appropriate direction of air flows, with R744 refrigerant (natural gas, non-toxic, non-flammable, readily available), for the production of hot and cold air; the device object of the present invention is composed of a suction damper system (1) consisting of concentric cylinders (A, B, C), designed to implement the reversibility of the operation between heating and cooling), and a refrigeration circuit comprising: cold exchanger (2) and a hot exchanger (3), located between the intake damper system (1) and the delivery damper system (4) consisting of concentric cylinders (D, E, F), also designed to implement the reversibility of operation in a manner consistent with the system of intake dampers (1).

Abstract: A reversible heat pump device (100) is described by means of an appropriate direction of air flows, with R744 refrigerant (natural gas, non-toxic, non-flammable, readily available), for the production of hot and cold air; the device object of the present invention is composed of a suction damper system (1) consisting of concentric cylinders (A, B, C), designed to implement the reversibility of the operation between heating and cooling), and a refrigeration circuit comprising: cold exchanger (2) and a hot exchanger (3), located between the intake damper system (1) and the delivery damper system (4) consisting of concentric cylinders (D, E, F), also designed to implement the reversibility of operation in a manner consistent with the system of intake dampers (1).

Abstract: A reverse cycle steam compression thermal machine is described, concerning a main circuit (100) connected to an auxiliary circuit (200), comprising an economizer (3), the main circuit (100) comprising a first high pressure exchanger (2) and an evaporator (5), the auxiliary circuit (200) comprising a second high pressure exchanger (7a) and a second expander (8); the economizer (3) includes a first hot branch (1c), a first cold branch (1f), a second hot branch (2c) and a second cold branch (2f).