ENERGY CONSERVING HEAT EXCHANGE APPARATUS FOR REFRIGERATING MACHINES, AND REFRIGERATING MACHINE EQUIPPED THEREWITH

摘要

For an ice making machine including a refrigeration unit (11) there is provided a water-to-refrigerant heat exchange condenser (12) connectible to an external water supply (13, 14) for heating water therein. The heat exchange relation between the refrigeration unit (11) and the external water supply is determined by a control system (26, 28, 30) which is responsive to both refrigerant pressure at the condenser refrigerant outlet (12b), and the water temperature at the condenser water outlet (12d) for controlling water flow through the condenser while maintaining a pre-determined optimum range of refrigerant pressures in the heat exchanger (12).