G - Physics – 05 – D
Patent
G - Physics
05
D
341/28, 62/40
G05D 23/24 (2006.01) F25B 41/06 (2006.01) G05D 23/20 (2006.01)
Patent
CA 1239458
A CONTROL SYSTEM FOR AN ELECTRONIC EXPANSION VALVE IN A REFRIGERATION SYSTEM ABSTRACT OF THE DISCLOSURE A control system for an electronic expansion valve in a refrigeration system is disclosed. The electronic expansion valve incrementally controls refrigerant flow between a condenser and an evaporator of the refrigeration system. The electronic expansion valve is operated by a digitally controllable electric motor which incrementally adjusts the position of the electronic expansion valve in response to electronic digital control signals supplied to the motor from a microcomputer control system. The microcomputer control system supplies the electronic digital control signals to the motor in a preprogrammed manner in response to selected sensed operating conditions of the refrigeration system. Preferably, the electronic expansion valve is controlled in response to superheat of refrigerant vapor flowing from the evaporator to a compressor of the refrigera- tion system.
467578
Lord Richard G.
Schedel John W.
Carrier Corporation
Gowling Lafleur Henderson Llp
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