What connects the evaporator to the compressor in a refrigerant system?

• A. Liquid Line
• B. Suction Line
• C. Discharge Line
• D. Service Line

Answer: (B)

The suction line is the correct connection between the evaporator and the compressor in a refrigerant system. After the refrigerant evaporates and absorbs heat in the evaporator, it becomes low-pressure vapor. This vapor exits the evaporator and travels through the suction line to the compressor. The compressor's role is to increase the pressure of this low-pressure vapor, preparing it for the next stage of the refrigeration cycle, which is the condenser.

In contrast, the liquid line transports the high-pressure liquid refrigerant from the condenser to the expansion valve or evaporator. The discharge line carries the high-pressure vapor from the compressor to the condenser. The service line is used for maintenance and servicing but is not part of the normal refrigerant flow in the system. Thus, the suction line is the essential component linking the evaporator to the compressor, facilitating the continuous cycle of refrigerant in the system.