Incrementally adjustable electronic expansion valve

Details Incrementally adjustable electronic expansion valve Incrementally adjustable electronic expansion valve

F - Mech Eng,Light,Heat,Weapons

25

B

62/40

F25B 41/06 (2006.01) G05D 23/20 (2006.01)

Patent

CA 1230746

AN INCREMENTALLY ADJUSTABLE ELECTRONIC EXPANSION VALVE ABSTRACT OF THE DISCLOSURE An incrementally adjustable electronic expansion valve for precisely controlling refrigerant flow through the valve is disclosed. Basically, the expansion valve includes a stepper motor, a sleeve member, and an orifice assembly. The sleeve member is incrementally moved over a slot(s) in the orifice assembly by operation of the stepper motor to control refrig- erant flow between an inlet and an outlet of an expansion valve. A control system provides electronic digital control signals to the stepper motor to control operation of the motor in response to superheat of refrigerant flowing from an evaporator to a compressor of the refrigeration system. The electronic expansion valve may also include sealing means to substantially prevent refrigerant flow through the valve when the sleeve member is in its fully closed position.

467579

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