Working circuit for refrigerator has evaporator passing vapor to heat exchanger followed by compressor and condenser and liquid is returned from condenser to heat exchanger and control valve

摘要

A thermostatically controlled expansion valve (5) is installed in the liquid line leading from the heat exchanger (2) to the evaporator (1). Vapor leaving the evaporator passes through the heat exchanger to cool the liquid. It passes a temperature sensor (6) which controls the valve. A compressor (4) passes the vapor to the condenser (3), which passes heat to the environment. Warm liquid is cooled by passing it through the heat exchanger.