Think of Them as a Refrigerator
In many ways, the air conditioner has a lot in common with the refrigerator that you use to keep food fresh. The difference between your fridge and an air conditioner is that one is designed to keep a small space very cold while the other is designed to keep your entire house at a comfortable temperature. Think of the walls of your house as the walls of a refrigerator and you’ll have a better idea of how the device works.
They Absorb Heat from the Air
An air conditioner uses coils to convert refrigerants from a liquid into a gas repeatedly. These refrigerants are capable of changing form at lower temperatures, and when they change, they absorb heat in the process. This is what turns the hot air into cold air, as the hot air is being passed by coils which are using these refrigerants to absorb the heat from the air surrounding them, thus creating refrigeration.