Patent ID: 6751965
Filing Date: 2004-06-22
Classification: F25B

Abstract:
A heat transfer system of the vapor compression and expansion cycle type, comprising:a compressor disposed to compress a refrigerant, said compressor having a suction side disposed to draw refrigerant into said compressor and a discharge side disposed to discharge compressed refrigerant from said compressor; a plurality of condensing conduits connected in interruptible fluid communication with said discharge side of said compressor, arranged in parallel to one another with regard to the refrigerant circuit, and disposed to reject heat from compressed refrigerant; valve apparatus disposed to selectively open fluid communication between said discharge side of said compressor and any selected single one of said plurality of condensing conduits, while simultaneously closing fluid communication between said discharge side of said compressor and all remaining ones of said plurality of condensing conduits; and an expansion chamber disposed to receive compressed refrigerant from said plurality of condensing conduits and to expand compressed refrigerant, said expansion chamber having passages enabling continuous fluid communication between each one of said plurality of condensing conduits and said expansion chamber.