Principles of Air Conditioning
(Expansion Valve System)
High pressure side
Low pressure R134a vapor entering the
compressor is compressed to become high pressure/temperature R134a vapor. This is then circulated along with lubricant oil to the
condenser. As the high pressure/temperature vapor travels through the condenser, heat is
released to the cooler ambient air passing over the condenser tubes condensing the
vapor into a liquid. This high
pressure/temperature liquid then travels
through the filter drier onto the expansion
valve where a small variable orifice provides a restriction against which compressor pushes.
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