What is the main function of a heat pump in HVAC systems?

The main function of a heat pump in HVAC systems is to transfer heat from one place to another, which allows for both heating and cooling of a space. This operation is achieved through a refrigeration cycle, which utilizes a compressor, a condenser, an expansion valve, and an evaporator. In heating mode, the heat pump extracts heat from the outside air or ground and moves it indoors, effectively warming the interior space. Conversely, in cooling mode, it removes heat from the indoor air and releases it outside, thereby cooling the indoor environment. This versatility in managing heat transfer makes heat pumps an efficient solution for temperature control in buildings.