Air Conditioner


The first true air conditioner was developed in 1902by an American engineer, Willis Carrier. He installed his system into Sackett-William, a New York (U.S.A.) printing plant.

An air conditioner consists mainly of a fan, evaporator which contains the refrigerant, condenser and compressors. An air conditioner takes heat from the air inside a building, room etc. transfers it to the air outside the room. Thus the room or building etc. is cooled.

This transfer is done in stages. First, the fan blow shot hurried air over the evaporator and condenser. A narrow pipe called the expansion valves, which because of its shape restricts the flow of the refrigerant, reducing its' (the refrigerant's) pressure. As it leaves the expansion valves, the refrigerant evaporates and cools. Heat flows from the hot room into the cold evaporator.

The compressor pumps the refrigerant from the evaporator in the inside of the building to the condenser on the outside. The refrigerant vapour leaves the compressor at high pressure and condenses back to a liquid. As this happens the refrigerant gives out heat. Thus, the heat is transferred from inside the building to tile outside. Therefore the building is cooled.

Summing it up, the refrigerant vaporises when hot air is blown over the evaporator. As It vaporises It takes heat from the air and condenses the air's moisture into drops. The cool dry air returns to the room

This article was culled from the publications of Deen Communication Limited

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