Electric expansion valve

摘要

An electronically controlled stepper motor valve utilizes an electric feed through assembly providing electrical connection between the stepper motor and a mating cable connector; wherein the electric feed through assembly includes four individual leads that are sequenced to allow the mating cable connector to be installed in any of four positions, each 90 degrees apart. The ability to use a 90 degree elbow style cable connector allows the EEV footprint to be minimized which provides an advantage when the electric expansion valve is installed in the tight confines of a package system.

主权项

1. An electric expansion valve comprising:
a valve body defining an inlet and an outlet and a fluid passageway therebetween, the fluid passageway including a valve port, the valve body having a cylindrical cavity having a shoulder; a pin movable axially in and out of the valve port to open and close the valve; an actuator comprising a motor coupled to the pin by a gear train which drives the pin axially in and out of the valve port; a gear cup positioned in the cylindrical cavity of the valve body, the gear cup housing the gear train and having an outside diameter that registers against the cylindrical cavity substantially 360 degrees; a plunger guide; and a bearing between the gear cup and the plunger guide, wherein the bearing is secured against axial movement between the gear cup and the plunger guide; wherein the plunger guide is secured against axial movement away from the gear cup by the shoulder of the cylindrical cavity; and wherein the gear cup includes an axially extending tab.