04523435 is referenced by 92 patents and cites 3 patents.

A refrigeration system is disclosed which may have multiple compression and condenser stages, in which an electronic refrigerant expansion valve is controlled by the digital output of a microcomputer which adjust the expansion valve in response to a valve change signal which is a function of a fraction of the deviation of the sensed refrigerant superheat from a desired superheat added to a multiple of the computed rate of change of the refrigerant superheat.

Title
Method and apparatus for controlling a refrigerant expansion valve in a refrigeration system
Application Number
6/562896
Publication Number
4523435
Application Date
December 19, 1983
Publication Date
June 18, 1985
Inventor
Richard G Lord
Liverpool
NY, US
Agent
Frank N Decker Jr
Assignee
Carrier Corporation
NY, US
IPC
G05D 15/00
F25B 41/00
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