Refrigeration – Automatic control – Refrigeration producer
Reexamination Certificate
2006-11-14
2006-11-14
Norman, Marc (Department: 3744)
Refrigeration
Automatic control
Refrigeration producer
C062S205000, C062S210000, C062S211000, C062S212000, C062S217000, C062S228300, C062S229000
Reexamination Certificate
active
07134294
ABSTRACT:
A method and apparatus for refrigeration system control includes a control system operable to meet cooling demand and control suction pressure for a plurality of refrigeration circuits each including a variable valve and an expansion valve. The controller controls the variable valve independently of the expansion valves to meet cooling demand by determining a change in a measured parameter and controlling at least one of the variable valves based upon the change to an approximately fully open position.
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Chabucos Jim
Singh Abtar
Wallace John G
Wickberg Paul
Computer Process Controls Inc.
Harness, Dickey & Pierce P.L.L.C.
Norman Marc
LandOfFree
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