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US 2003/0115894 A1Published application
High efficiency very-low temperature mixed refrigerant system with rapid cool down
AssigneeIGC-Polycold Systems, Inc.
InventorsOleg Podtchereniaev, Kevin Flynn, Tarrurisa Apparao, Mikhail Boiarski
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Abstract
The present invention is a refrigeration system that uses a nonflammable, nonchlorinated refrigerant mixture to achieve very-low temperatures using a single compressor. The system is characterized by both high efficiency and rapid cool down time.
Claims7
A low temperature closed cycle refrigeration system comprising:
- a single compressor with an outlet delivering a refrigerant flow at high pressure and an inlet receiving said refrigerant flow at low pressure;
- a condenser unit receiving said high-pressure refrigerant flow from said compressor and removing heat therefrom;
- an evaporator receiving said refrigerant flow from said condenser unit at low pressure and low temperature and returning said refrigerant flow to said compressor inlet;
- a flow metering device between said condenser unit and said evaporator to reduce said high pressure from said compressor to said low pressure in said evaporator and to lower the temperature of said refrigerant flow;
- and
- a refrigerant circulating in said closed cycle without refrigerant freeze-out at said low pressure, said refrigerant being a mixed refrigerant, the components of said mixed refrigerant having a range of respective normal boiling temperatures of at least 50° C.
3 more elements
Dependencies are inferred from the claim text.