Patent ID: 6185955
Filing Date: 2001-02-13
Classification: C09K,F25B,Y02P

Abstract:
A refrigerating system using a given refrigerant and comprising:a compressor for compressing said given refrigerant into a superaritical state having pressure higher than critical pressure of said given refrigerant, said compressor containing lubricating oil which is dissolved in said given refrigerant, and discharging a compressed refrigerant of the supercritical state and said lubricating oil;an oil separator connected to said compressor and supplied with said compressed refrigerant for separating said lubricating oil from said compressed refrigerant to produce an oil-separated refrigerant;a radiator connected to said oil separator for cooling said oil-separated refrigerant into a cooled refrigerant;expanding means connected to said radiator for decompressing said cooled refrigerant into a decompressed refrigerant having a pressure lower than said critical pressure; andan evaporator connected to said expanding means and said compressor for evaporating said decompressed refrigerant into an evaporated refrigerant which is supplied as said given refrigerant to said compressor.