Refrigeration – Automatic control – Time or program actuator
Patent
1992-12-16
1994-01-04
Tanner, Harry B.
Refrigeration
Automatic control
Time or program actuator
62217, 62229, 623231, 236 46R, 236 91R, 1231794, F23N 520
Patent
active
052750116
ABSTRACT:
A method of operating a refrigeration system having a compressor driven by an engine, with the refrigeration system being operable in a first control mode to hold the temperature of a conditioned space at a selected set point temperature, and in a second control mode to maintain the engine in a ready-to-start condition. The second control mode includes monitoring the ambient temperature, and determining a dynamic set point temperature as a function of ambient temperature. The engine is started and stopped to maintain engine startability, and also as a function of the dynamic set point temperature, to maintain the temperature of the conditioned space at the dynamic set point temperature while maintaining the engine in a ready-to-start condition. Control is changed from the second to the first control mode, when a programmed start feature is activated, with the time of such mode change being a function of the difference between the ambient temperature and the selected set point temperature.
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Hanson Jay L.
Knauff Donald G.
Ladendorf Gerald J.
Moran M. J.
Tanner Harry B.
Thermo King Corporation
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