Refrigeration – Automatic control – Refrigeration producer
Patent
1995-05-03
1995-12-26
Tanner, Harry B.
Refrigeration
Automatic control
Refrigeration producer
62210, F25B 4104
Patent
active
054777011
ABSTRACT:
A mass flow control apparatus and method for use in combination with a heat transfer system having a compressor, condenser, expansion valve, evaporator and working fluid in a fluid circuit. The mass flow is controlled using a quality sensor for the working fluid exiting the evaporator, and a high side pressure sensor. A control circuit is provided that monitors the quality sensor and the high side pressure sensor, and controls operation of the compressor, condenser fan and valve in response thereto. A flow reduction mode is used to reduce high side pressure at the valve inlet without excessive compressor cycling by changing the quality sensor set point when the high side pressure exceeds the condenser fan turn-on pressure but is less than the compressor disengage pressure.
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Campbell Chester D.
Harper Sandra L.
Jain Virender
Kenyon Richard L.
Matthies Alan
Parker-Hannifin Corporation
Tanner Harry B.
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