Final answer:
The float valve is the metering device used on flooded evaporators that opens to allow more refrigerant to enter as it condenses. The air conditioning component that converts gas into liquid is the condenser.
Step-by-step explanation:
The metering device used on flooded evaporators that opens when more refrigerant condenses, enabling the refrigerant flow into the evaporator, is the float valve. This type of valve adjusts the flow of liquid refrigerant into the evaporator based on the level of liquid refrigerant inside the evaporator itself. As more refrigerant condenses, the level inside the evaporator rises, prompting the float valve to open and allow more refrigerant to enter, ensuring a consistent refrigeration effect.
To answer the follow-up question, the component of an air conditioner that converts gas into liquid is the condenser. In this process, the refrigerant gas, having been compressed and heated by the compressor, is forced into the condenser coils, where it releases heat to the surroundings and condenses into a liquid form. The condensed liquid then flows back through a pressure-reducing expansion valve, where it is cooled further upon expansion before it reaches the evaporator coils.