Boots – shoes – and leggings
Patent
1985-02-15
1987-05-05
Chin, Gary
Boots, shoes, and leggings
364507, 364557, 165 26, 165 27, G06F 1520, G06F 1546, F25B 2900
Patent
active
046637257
ABSTRACT:
A microprocessor based system monitors and controls a transport refrigeration system having a two speed compressor coupled to a condenser and an evaporator and further having two speed condenser and evaporator fans, a refrigerant modulating valve, and heater means to cool or heat a served space. A keypad is provided for operator entry of the temperature setpoint and for display selections. Return air and discharge air temperature sensors provide signals to the microprocessor for temperature control. The microprocessor is programmed to sequence or control the compressor, the fans, the modulating valve and the heater means for temperature control in accordance with one of four stored algorithms. One of the temperature sensors is used for control, and if it is detected to have failed automatic switchover is made to use of the other temperature sensor for temperature control. Various input signals from the refrigeration system and from the microprocessor hardware are processed by the microprocessor to provide a data log and data for display and to detect system faults for fault history storage and for protective control action.
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Christiansen David A.
Colclaser III Robert G.
Falk Herbert S.
Johnson Richard A.
Truckenbrod Gregory R.
Chin Gary
Lackey D. R.
Laibowitz Danielle
Thermo King Corporation
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