Patent ID: 6058727
Filing Date: 2000-05-09
Classification: F25B

Abstract:
A refrigeration system for cooling air, comprising:a substantially liquid refrigerant;an evaporator for transferring heat from the air to said substantially liquid refrigerant, whereby said substantially liquid refrigerant becomes a low temperature, low pressure first substantially gaseous refrigerant;a compressor for compressing said first substantially gaseous refrigerant into a high pressure, high temperature superheated second gaseous refrigerant;a lubricant circuit for supplying lubricant to said compressor;a condenser for rejecting heat from said second gaseous refrigerant and forming a high pressure, lower temperature sub-cooled liquid refrigerant, said condenser having an output stream;a metering device for transforming said sub-cooled liquid refrigerant into said substantially liquid refrigerant for said evaporator; anda heat exchanger means for receiving said first substantially gaseous refrigerant as a coolant on route to said compressor, wherein said first substantially gaseous refrigerant is relatively cooler than said lubricant and said sub-cooled liquid refrigerant, said lubricant via said lubricant circuit flowing through said heat exchanger means for achieving cooling prior to entering said compressor and said sub-cooled liquid refrigerant flowing through said heat exchanger means for achieving sub-cooling prior to entering said metering device.