The HVAC compressor is the key component in any air-conditioning loop or cooling system. Ultimately a compressor compresses refrigerant gas by diminishing the volume. When gas is compressed, the temperature of this gas increases. When the temperature of the refrigerant is higher, it is then passed through a condenser where heat exchange occurs which in turns, lowers the overall temperature while keeping this pressure intact. The expansion valve is responsible for reducing both pressure and temperature.
HVAC stands for heating, ventilation and air conditioning. The compressor itself is usually the most expensive part of a cooling system for a home as it draws the most amount of power. Compressors come in a variety of designs. A reciprocating compressor has pistons that move up and down similar to that of a car’s engine. A scroll compressor is slightly more efficient. A successful HVAC system will have a compression relief valve which regulates pressure in the system.
Ultimately an HVAC technician should annually evaluate an existing system to determine whether or not a compressor is efficient and doing its job properly. A HVAC professional will check for any leakages, fan amperage and connection integrity to ensure the system’s safety and efficiency.
Annual heat and air service is one of the best things that a homeowner can do to save money and extend the life of the equipment.