REFRIGERANT CIRCULATION SYSTEM

摘要

A refrigerant circulation system is provided to reduce manufacturing costs by using a capillary tube and an on/off valve instead of a high cost electronic expansion valve. A refrigerant circulation system(100) comprises a branched pipe, a capillary tube(180) and an opening/closing valve(190). The branched pipe allows some refrigerant with a gas state to be branched. The capillary tube is provided in any one side of the branched pipe, and forms predetermined flow resistance, so that the branched refrigerant with the gas state is lowered to temperature and pressure of the refrigerant undergoing first compression. An opening/closing valve is provided in an outlet of the capillary tube.