What is the primary function of the compressor in a heat pump?

The primary function of the compressor in a heat pump is to compress refrigerant gas, which raises its temperature and pressure. This process is essential for the operation of the heat pump as it allows the refrigerant to absorb heat from one area (such as the outside environment) and release it into another (such as the indoor space).

When the refrigerant gas is compressed, it transitions from a low-pressure, low-temperature state to a high-pressure, high-temperature state. This transformation is crucial because it increases the refrigerant's ability to transfer heat. The heated, high-pressure gas then moves through the system, where it releases heat as it condenses in the indoor coil, delivering warmth to the indoor environment. This cycle is fundamental to the effectiveness of heat pumps in both heating and cooling modes, making the compressor a vital component of the system.

While other components, such as the air handler or heat exchanger, also play important roles in the overall system operation, the compressor's role in raising the temperature and pressure of the refrigerant is what enables the heat exchange to take place effectively.