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US 4,285,205 AGranted
Refrigerant sub-cooling
OwnerLeonard I. Martin, Robert H. Harmsinventors
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OwnerLeonard I. Martin, Robert H. Harmsinventors
Estimating the term…
Disclosed is a commercial refrigeration system of a type having at least one compressor, a suction header and a liquid header at a central location or machinery center, a condenser and a plurality of remotely located evaporators, wherein a suction-to-liquid heat exchanger is embodied in the suction header of the system and all of the relatively cool gaseous refrigerant returning to the central location from the remotely located evaporators is maintained in heat exchange contact with substantially all of the primary stream of relatively warm liquid refrigerant produced by the operation of the compressor and condenser. The large amounts of relatively warm liquid refrigerant and relatively cool gaseous refrigerant in heat exchange contact with one another enables the centrally located heat exchanger (1) to increase the suction gas temperature going into the suction side of the compressors, which increases their refrigerating capacity, and (2) to usefully sub-cool the liquid refrigerant before it is directed to the expansion valves in order to increase the refrigerant effect and efficiency of the system and cause a corresponding reduction in power requirements.
In a refrigeration system of a type having at least one compressor at a central location, a condenser, a plurality of remotely located evaporators, liquid-side conduit means interconnecting the output of said condenser with the inputs of said evaporators for conducting relatively warm refrigerant liquid from said condenser to the inputs of said evaporators, and suction-side conduit means interconnecting the outputs of said evaporators with the input of said compressor for conducting relatively cool gaseous refrigerant from said evaporator outputs to the input of said compressor, the improvement comprising a liquid-to-suction heat exchanger, said heat exchanger being located at said central location, and the respective conduit means being connected to said heat exchanger so as to allow substantially all of the relatively cool gaseous refrigerant returning to said compressor input from said evaporators to be maintained in heat exchange contact at said central location with substantially all of the relatively warm liquid refrigerant being conducted from said condenser to said evaporator inputs.
In a method for sub-cooling liquid refrigerant in a refrigeration system of a type having at least one compressor at a central location, a condenser, a plurality of remotely located evaporators, liquid-side conduit means interconnecting the output of said condenser with the inputs of said evaporators, and suction-side conduit means interconnecting the outputs of said evaporators with the input of said compressor, the improvement comprising the steps of:
Dependencies are inferred from the claim text.