There are five components that make up an air conditioners inner workings: an expansion valve, a condenser, an evaporator, a pump and a refrigerant liquid. All of these pieces work together in a process that allows the fluid to pull heat from the air.
An air conditioners encasement usually features galvanized metal parts that are resistant to rust. A computerized press punches metal sheets to form the casing. Manufacturers also use this press to make several of the air conditioner's inner working parts. After the casing receives a coating with insulating powder, the manufacturer makes the copper tubing for the evaporator and condenser, bending the tubing so that the fluid can travel far enough to do its job. The manufacturer positions the tube into both operating sides of the system where the fluid exchanges thermal energy with the air.
The manufacturer installs the expansion valve, typically purchased from a third party, where the liquid flows from the condenser, and the condenser, which circulates the refrigerant when assembled. The evaporator allows warm air to cool off by heating the liquid up. The condenser pushes the heat from the liquid out into the environment and allows the refrigerant fluid to turn back into a liquid and cool off so that the process continues.