The basic refrigeration system in a Cola Machine works as follows
- The compressor compresses the refrigerant
gas. This raises the refrigerant's pressure and temperature, so
the heat-exchanging coils outside the refrigerator allow the refrigerant
to dissipate the heat of pressurization.
- As it cools, the refrigerant condenses
into liquid form and flows through an expansion valve.
- When it flows through the expansion
valve, the liquid refrigerant is allowed to move from a high-pressure
zone to a low-pressure zone, so it expands and evaporates . In
evaporating, it absorbs heat, making it cold.
- The coils inside the refrigerator
allow the refrigerant to absorb heat, making the inside of the
machine cold. The cycle then repeats.
The basic components are
- A compressor
- An expansion valve
- A hot coil (on the outside)
- A chilled coil (on the inside)
- Two fans
- A control unit