Air-conditioner

An air conditioner is basically a refrigerator without the insulated box.The mechanics of the Freon evaporation cycle are the same in a refrigerator as in an air conditioner.

1. The compressor compresses cool Freon gas, causing it to become hot, high-pressure Freon gas (red in the diagram above).
2. This hot gas runs through a set of coils so it can dissipate its heat, and it condenses into a liquid.
3. The Freon liquid runs through an expansion valve, and in the process it evaporates to become cold, low-pressure Freon gas (light blue in the diagram above).
4. This cold gas runs through a set of coils that allow the gas to absorb heat and cool down the air inside the building.

A window air conditioner unit implements a complete air conditioner in a small space.