What is (DX )direct expansion air conditioning unit!By Imran

direct expansion air conditioning unit, also called a DX unit, cools indoor air using a condensed refrigerant liquid. It is the type of air conditioning unit most commonly used in homes in the United States.

Direct Expansion Cooling The unit cools air by passing the condensed refrigerant through a heat exchanger inside the building to be cooled. In this part of the unit, called the evaporator, the refrigerant expands as it absorbs heat, eventually converting to a gas. The unit then pumps the refrigerant to a compressor, which compresses the gas and passes it through another heat exchanger, the condenser, outside the building. The heat that has been absorbed by the refrigerant is released to the outdoor air, and the cooled, compressed refrigerant is once again in liquid form. The unit pumps the cooled refrigerant liquid back to the evaporator and the cycle begins again.