Sensing refrigerant temperature in a thermostatic expansion valv

Details Sensing refrigerant temperature in a thermostatic expansion valv Sensing refrigerant temperature in a thermostatic expansion valv

1990-03-19

1991-01-15

Tapolcai, William E.

Automatic temperature and humidity regulation

Thermostatic

With pressure control

62225, F25B 4104

Patent

active

049847350

ABSTRACT:
A mechanical refrigerant thermal expansion valve has a sensing port sealed with a cupped shape closure received therein and sealed about the cup rim. A cover assembly is removeably attached to the valve over the cup with a thermistor extending into the cup which is filled with thermally conductive grease for thermal conductivity between the cup and the thermistor. The cover assembly has an electrical connector provided thereon. The thermistor is preferably mounted on printed circuit board potted in the cover which may include electronic signal logic and power switching circuitry.

REFERENCES:
patent: 3478534 (1969-11-01), Matthies
patent: 4065939 (1978-01-01), Thornberg et al.
patent: 4660387 (1987-04-01), Usami
patent: 4819443 (1989-04-01), Watanabe et al.

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