CONTROLLING REFRIGERANT IN A CLOSED LOOP RECIRCULATION SYSTEM

摘要

A refrigerant system having individual thermal expansion valves for controlling refrigerant flow from a common compressor and condenser to separate remotely located evaporators such as for vehicle front and rear seat passenger comfort. One of the remote thermal expansion valves has a thermoelectric cooler in heat conducting relationship with the fluid filled power capsule of the valve. Upon energization of the thermoelectric cooler the sensed temperature of the refrigerant returning through the valve from the evaporator to the compressor is altered to cause the valve to reduce refrigerant flow to the evaporator to compensate for reduced refrigerant supply pressure due to flow through the other thermal expansion valve.