Refrigeration – Processes – Lubricant handling
Reexamination Certificate
2007-05-15
2007-05-15
Tapolcai, William E. (Department: 3744)
Refrigeration
Processes
Lubricant handling
C062S256000, C062S468000
Reexamination Certificate
active
10962976
ABSTRACT:
A supermarket refrigeration system may include a plurality of supermarket refrigeration cases, each including an evaporator and an associated compressor connected downstream therefrom. A common condenser is connected downstream from the compressors, and a receiver is connected downstream from the common condenser and upstream from the evaporators. A liquid header extends throughout the supermarket and connects the receiver and the evaporators. A discharge header extends throughout the supermarket and connects the compressors to the common condenser. An oil-bearing refrigerant mixture may circulate through a refrigerant circulation path to lubricate the compressors without undesired pooling and without an oil separator. The system may further include a selectively operable defrost circuit which uses hot refrigerant mixture for defrosting.
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Allen Dyer Doppelt Milbrath & Gilchrist, P.A.
Tapolcai William E.
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