An air conditioning machine controls more than the temperature of the interiors. It also controls the amount of moisture, movement, and purity of the air. We have come to rely on air conditioning systems to keep us comfortable during the summer months.
The machine used to generate air conditioning works similarly to a kitchen refrigerator. Both rely on a fast-evaporation liquid to quickly cool what comes in contact with it.
When an air conditioner switch is turned on, fresh air passes through a filter to remove dust, and an electric motor begins to circulate refrigerant from a compressor through tubes or coils. While the refrigerant is being pumped through the coils, it absorbs the heat from the coils, cooling them together with the air around them.
The added heat causes the refrigerant to evaporate into a gas. At this point, an electric fan blows cold, clean air through the air conditioning vents in the room. The refrigerant becomes a liquid again when it returns to the compressor. This cycle continues indefinitely until the system is shut down.
Since the 1940s, all new buildings, factories and many private properties have been designed to include air conditioning. Boats, airplanes, offices, restaurants, theaters and shops make use of this constant flow of pleasant, purified air.
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