Refrigeration Cycle
Liquid refrigerant enters the evaporator under low pressure and temperature, absorbs heat from the air circulating through the fins by forced convection and vaporizes, this air in turn removes heat from the food or medium to be cooled.
Then the fluid is sucked from the interior of the evaporator into the vapor state at low pressure and temperature by the compressor via the suction line. The compressor compresses the refrigerant describing a practically isentropic process and discharges it into the condenser through the discharge line, with much higher pressure and temperature, the refrigerant begins its process of heat rejection, ie begins to release heat. to the outside until it reaches the condensing pressure and temperature from the gaseous to the liquid state.
From the condenser outlet, where it is desired for the fluid to exit fully into the liquid phase, the fluid proceeds to the liquid tank, where, condensate accumulates at the bottom and through a tube called a fisherman it exits the tank entirely at the bottom. liquid phase following through the liquid line through the filter drier, liquid display still releasing heat to the external environment, the fluid is said to be subcooling until it reaches the expansion valve or capillary tube (expansion device) responsible for decompression refrigerant, taking it from condensing pressure to evaporating pressure.
At the outlet of the expansion device, the evaporator inlet, the refrigerant undergoes a drop in pressure and temperature, then expands to the vapor phase again removing heat from the internal environment and starting the cooling process again.
