What component controls the flow rate of refrigerant into an evaporator?

The component responsible for controlling the flow rate of refrigerant into an evaporator is the metering device. This device regulates the amount of refrigerant that enters the evaporator coil, ensuring the system operates efficiently and effectively.

The metering device reduces the pressure of the refrigerant, which is necessary for it to evaporate and absorb heat in the evaporator. By controlling the flow rate, the metering device helps maintain the right balance of refrigerant in the evaporator, allowing for optimal cooling performance. It prevents both excess refrigerant, which can lead to inefficiencies or system flooding, and insufficient refrigerant, which can cause the evaporator to not cool effectively.

In a cooling system, proper function of the metering device is critical to achieving the desired temperature control and energy efficiency, showcasing its importance in the refrigerant flow process.