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A/C SYSTEM COMPONENTS Click to add Text Visit for more Learning Resources
The Refrigeration Cycle Refrigeration – To remove heat by mechanical means Refrigerant – Chemical compound used in a refrigeration system to carry heat Refrigeration Cycle – Repeatedly changing refrigerant from a liquid to a vapor & vapor to liquid to remove heat
Basic Air Conditioning System
Compressor Refrigerant pump Increases Pressure & Temperature Separates High & Low sides of system Oil stored in Crankcase (sump)
Compressor Malfunctions Malfunctions evident in following ways: – – – – Noise Seizure Leaks High inlet & low discharge pressures
Discharge Hose CONTAINS HIGH PRESSURE. SYNTHETIC RUBBER WITH NYLON BARRIER LINING. 13/32 ID. PREFORMED METAL ENDS WITH FITTINGS.
Condenser Heat exchanger. Liquefies heat laden vapor Hot vapor enters at top of condenser Hot liquid leaves at bottom
Conventional Tube and Fin Parallel Two Path. Mechanically expanded tube to fin joints. Circular Tubes.
Serpentine Tube and Center Condenser Brazed tube to fin joints. Flat Tubes. Parallel two path flow.
Multi-Louver Fin Design Manifolded Multi-path refrigerant flow.
Evaporator Dehumidifies the airstream. Under ideal conditions, refrigerant boils to complete saturation 3/4 of the way through Evaporator. Flooded evaporator means is full of liquid refrigerant with no room for expansion. Starved evaporator means all refrigerant is boiled in the first quarter of the evaporator.
Receiver -Drier Stores reserve liquid refrigerant Ensures vapor-free liquid to the thermostatic expansion valve (TXV). Located on the high side of the system. Contains a desiccant that absorbs moisture.
Thermostatic Expansion Valve Located on inlet side of evaporator. Used to control evaporator temp. Variable orifice can vary on pressure, temperature or both. Can malfunction in open or closed position.
Orifice Tube Calibrated Restrictor Different color different Orifice size. Mesh Filter Screen. Meters refrigerant into evaporator as low pressure liquid.
Accumulator Located between evaporator and compressor (low side) Primary function is to separate the vapor from the liquid and oil. Location for desiccant. For more detail contact us