Machine capable of transferring thermal energy from a source at a lower temperature (water, air, soil) at a higher temperature, utilized by man, with the sole contribution of electricity.
The transfer takes place by means of a refrigerant circuit: If the operation is reversible, the unit can also function as a refrigerating machine.
Similarly to a hydraulic pump that raises water from a lower level to a higher one, the heat pump carries the heat from a thermal level to a lower thermal level higher and therefore usable for the purposes of air conditioning.
The elevation of the thermal level is via a heat exchange between two fluids separate and external to the heat pump, one for the external environment and the other for the room to be conditioned.
Between these two environments is interposed the refrigerant circuit, the heart of the heat pump, inside of which the refrigerant undergoes transformations that make it possible the operation.
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