Refrigeration system with refrigerant pre-cooler

Abstract From the Canadian patent

A refrigeration system is disclosed having greatly improved efficiency. The system includes a pre-cooler heat exchanger for sub-cooling the liquid refrigerant from the condenser to render the entire evaporator more effective for refrigeration purposes. The heat exchanger for pre-cooling the liquid refrigerant has one passage through which the hot liquid refrigerant flows and another passage in heat, exchange relation therewith, which is connected to receive a small flow of liquid refrigerant bled off from the main stream of the liquid refrigerant which refrigerant passes through an expansion valve or capillary tube to vaporize so that the liquid refrigerant is sub-cooled by the latent heat …