What component helps regulate the flow of refrigerant in the system?

The expansion valve is a crucial component in HVAC systems that regulates the flow of refrigerant. It controls the amount of refrigerant that enters the evaporator, where it absorbs heat from the indoor environment, thereby facilitating the cooling process. The expansion valve reduces the pressure of the refrigerant, which allows it to expand, vaporize, and absorb heat more efficiently.

This precise control helps maintain the desired cooling effect, ensuring the system operates efficiently and effectively. By adjusting the flow based on demand, the expansion valve contributes to the overall energy efficiency of the HVAC system, making it essential for proper functioning.