Switch for protecting a freon compressor

Details Switch for protecting a freon compressor Switch for protecting a freon compressor

1985-05-28

1986-08-12

Scott, J. R.

Electricity: circuit makers and breakers

Fluid pressure

Diaphragm

H01H 3540

Patent

active

046058311

ABSTRACT:
A device for sensing pressure and temperature within the crankcase of a refrigerant compressor is adapted to protectively stop the operation of the compressor when temperature and pressure conditions within the crankcase permit existence therein of liquid refrigerant. The device utilizes a sealed vessel containing liquid refrigerant. The sealed vessel extends from a head portion downwardly into the crankcase fluid, and is provided with a pressure-displaceable membrane seal in the head portion. When the membrane expands due to high temperature within the crankcase, it causes closure of an electrical circuit. A pressure equalizing conduit equalizes the pressure between the crankcase and a chamber that surrounds said head portion.

REFERENCES:
patent: 2761924 (1956-09-01), Keenan
patent: 2962566 (1960-11-01), Lisac
patent: 3161740 (1964-12-01), Schniers et al.
patent: 3293390 (1966-12-01), Shaw

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