It can be called the Refrigeration Cycle, a situation where, in a closed circuit, the refrigerant gas, successively transforming itself into liquid and steam, can absorb heat at low temperature and pressure through its evaporation and reject heat at high
temperature and pressure by condensation.
In practice, this is achieved from four fundamental elements:
1. Compressor, which aspirates and compresses the refrigerant vapor;
2. Condenser, where the refrigerant vapor is condensed, becoming liquid;
3. The Capillary Tube or the Expansion Valve, which lowers the system pressure through a theoretically isoentalpic expansion and controls the flow of refrigerant that reaches the evaporator and
4. The Evaporator, where the latent heat of vaporization is absorbed and sent to the compressor, starting a new cycle.
