Refrigeration – Refrigeration producer – Compressor-condenser-evaporator circuit
Reexamination Certificate
2006-05-30
2010-10-12
Tapolcai, William E (Department: 3744)
Refrigeration
Refrigeration producer
Compressor-condenser-evaporator circuit
C062S470000, C062S503000, C062S324600
Reexamination Certificate
active
07810353
ABSTRACT:
A multi-compressor heat pump system configured to provide heating and cooling over a range of ambient temperatures. The compressors can be operated independently and alone or together in series for maximum output. Heat exchangers are selectively fluidically connected to the compressors to enable refrigerant flow between the compressors and at least two heat exchangers in a manner that enables the heat pump system to be selectively operable in various modes. Preferred aspects include selectively operating the compressors based on the ratio of the evaporating and condensing pressures of the refrigerant within the heat pump system, a mixing chamber between the compressors, and a lubricant management system to prevent the accumulation of a lubricant in one of the compressors.
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Bertsch Stefan S.
Bouffard David B.
Groll Eckard A.
Hutzel William J.
Hartman Domenica N. S.
Hartman Gary M.
Hartman & Hartman P.C.
Purdue Research Foundation
Tapolcai William E
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