What is the purpose of a refrigerant changeover valve?

The purpose of a refrigerant changeover valve is specifically to switch the direction of refrigerant flow in heat pump systems. In heating mode, the valve directs the refrigerant flow so that it absorbs heat from the outside air and releases it indoors. Conversely, in cooling mode, the valve reverses the flow, allowing the refrigerant to absorb heat from inside the building and release it outdoors. This functionality is crucial in heat pumps, which can serve both heating and cooling needs by reversing the refrigeration cycle.

In contrast, adjusting airflow is not a function of the changeover valve, as it deals solely with refrigerant direction rather than airflow dynamics. Filtering contaminants from the refrigerant system is the job of dedicated filters or strainer components, not the changeover valve. Lastly, increasing the pressure of refrigerant is typically accomplished by compressors within the system, not through the changeover valve. The clear and specific role of the refrigerant changeover valve in controlling the heating and cooling process emphasizes its importance in HVAC applications, especially in heat pump systems.