Refrigeration – Diverse systems – e.g. – ice and mechanical – Primary and secondary dependent circuits
Reexamination Certificate
2011-03-22
2011-03-22
Tyler, Cheryl J (Department: 3744)
Refrigeration
Diverse systems, e.g., ice and mechanical
Primary and secondary dependent circuits
C062S079000, C062S335000, C062S513000
Reexamination Certificate
active
07908881
ABSTRACT:
An HVAC system having a main circuit and a subcooler circuit. The main circuit includes a main circuit evaporator, a main circuit expansion device, a main circuit condenser and a main circuit compressor connected in a closed refrigerant loop. The subcooler circuit includes a subcooler evaporator, a subcooler expansion device, a subcooler condenser and a subcooler compressor connected in a closed refrigerant loop. The subcooler evaporator is arranged and disposed to exchange heat between liquid refrigerant in the main circuit and the refrigerant in the subcooler circuit to cool the liquid refrigerant in the main circuit prior to entering the main circuit evaporator. The operation of the subcooler circuit provides an increased cooling capacity per unit of a mass flow of cooling fluid through the main circuit condenser and subcooler condenser for the HVAC system with a predetermined design efficiency.
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Loffredo Justin
McNees Wallace & Nurick LLC
Tyler Cheryl J
York International Corporation
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