Thermal Expansion Valve with Power Element

摘要

An improved power element for use with a thermal expansion valve. The power element contains a filter positioned at an open end of the power element to prevent debris from entering the body of the thermal expansion valve.

主权项

1. A thermal expansion valve for use in an automotive air conditioner comprising:
a body including an inlet port fluidly connected to an evaporator and an outlet port fluidly connected to a condenser; a power element having an annular domed upper housing, a mating annular lower housing having an opening in the bottom of the annular lower housing, an annular diaphragm having an upper surface and a lower surface wherein the lower surface of the diaphragm and the annular lower housing define a diaphragm chamber, a sleeve that passes through the opening in the bottom of the annular lower housing and a stem slidably disposed within the sleeve; and a paper filter disposed in a fluid path between the evaporator and the diaphragm chamber.