What system component regulates refrigerant flow in a system requiring continuous variation?

The expansion valve is crucial in regulating refrigerant flow within systems that require continuous variation. Its primary function is to control the amount of refrigerant that enters the evaporator based on the system's cooling demand. This modulation is essential for achieving efficient temperature control and optimizing the performance of the cooling system.

When the load changes, the expansion valve adjusts the flow of refrigerant to maintain the desired evaporator pressure and temperature. By doing so, it helps ensure that the system operates efficiently under varying conditions, preventing both undercooling and overheating scenarios. This adaptability is particularly important in applications where conditions fluctuate rapidly, allowing for a stable and effective cooling operation.