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US 2011/0209485 A1Published application
Suction superheat conrol based on refrigerant condition at discharge
OwnerAlexander Lifson, Michael F. Tarasinventors
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Abstract
A relationship is developed between a discharge condition of a refrigerant leaving a compressor, and the suction superheat or refrigerant quality. By relying upon measurement and control of the discharge condition, the present invention is able to achieve very low suction superheat values. Controlling the operation to very low suction superheat values results in augmented refrigerant system performance.
Claims25
A refrigerant system comprising:
- a compressor, said compressor having a suction inlet line and a discharge outlet line;
- a compressed refrigerant passing from said compressor downstream to a heat rejection heat exchanger and then downstream to an expansion device;
- an evaporator positioned downstream of said expansion device;
- and
- a sensor for sensing a condition of a discharge refrigerant leaving the compressor and
- a control utilized to control a refrigerant thermodynamic state at a location between the expansion device and the compressor based upon the sensed condition of the discharge refrigerant.
3 more elements
A method of operating a refrigerant system including the steps of:
- providing a compressor, said compressor having a suction inlet line and a discharge outlet line;
- passing a compressed refrigerant from said compressor downstream to a heat rejection heat exchanger and then downstream to an expansion device;
- passing the refrigerant to an evaporator downstream of said expansion device;
- sensing a condition of a discharge refrigerant leaving the compressor;
- and
- controlling a refrigerant thermodynamic state at a location between the expansion device and the compressor based upon the sensed condition of the discharge refrigerant.
3 more elements
Dependencies are inferred from the claim text.