Expansion valve and temperature sensing assembly therefor.

摘要

A refrigerant valve (10) has a sensing port (20) communicating with a refrigerant flow passage (16) therein with a deep-well tubular thermally conductive metal closure (30) sealed about the port (20) with the closed end in said port. A closed end metal probe (18) with a thermistor (50) disposed therein closely interfits the well of the closure (30) for heat transfer therewith. The probe (18) extends exteriorly of the closure (30) and is attached to a housing (34) or cover removably secured to the valve (10). Signal conditioning circuit board (146) means disposed in the housing (34) is connected to the thermistor (50) leads extending from the open end of the probe (18). Electrical terminals (62) or leads connect to circuitry and extend outwardly from the housing (34). The housing (34) and probe (18) may be removed as a unit without disturbing the seal (30) of the sensing port closure in the valve (18).