What unit is typically located immediately downstream of the expansion valve in a freon refrigeration system?

In a freon refrigeration system, the unit that is typically located immediately downstream of the expansion valve is the evaporator coils. The expansion valve is responsible for regulating the flow of refrigerant into the evaporator. When the refrigerant exits the expansion valve, it is at a low pressure and temperature, which allows it to absorb heat from the surrounding air or water in the evaporator.

The evaporator coils are designed to enable this heat absorption process. As the refrigerant passes through the coils, it evaporates and absorbs heat, which cools the air that passes over the coils, contributing to the overall cooling effect of the refrigeration system. This process is essential for achieving the desired cooling effect in both commercial and residential applications.

The other choices refer to different components in the refrigeration cycle: the compressor is responsible for compressing the refrigerant vapor, the condenser coils are where the refrigerant releases heat and condenses back into a liquid, and the expansion tank is not a standard component in most refrigerator systems. Therefore, identifying the evaporator coils as the unit immediately downstream of the expansion valve is correct based on the sequence of operations in the refrigeration cycle.