Method and apparatus for controlling a refrigerant expansion...

Details Method and apparatus for controlling a refrigerant expansion... Method and apparatus for controlling a refrigerant expansion...

F - Mech Eng,Light,Heat,Weapons

25

B

62/40

F25B 41/06 (2006.01) G05D 23/24 (2006.01)

Patent

CA 1233656

METHOD AND APPARATUS FOR CONTROLLING A REFRIGERANT EXPANSION VALVE IN A REFRIGERATION SYSTEM ABSTRACT OF THE DISCLOSURE 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.

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