Thermostatic expansion valve with electronic controller

Details Thermostatic expansion valve with electronic controller Thermostatic expansion valve with electronic controller

G - Physics

05

D

341/28

G05D 23/24 (2006.01) B60H 1/32 (2006.01) F25B 49/02 (2006.01) F25B 41/06 (2006.01)

Patent

CA 2037399

ABSTRACT OF THE DISCLOSURE A refrigeration system employing a mechanical thermal expansion valve with a self-heated thermistor sensing saturation temperature at the high pressure inlet. A microprocessor based controller compares the sensed temperature with stored limits and provides output signals to a relay for cycling the condenser fan responsive to high side pressure means are provided for varying the current through the thermistor for operating same in the non-self heated mode to sense actual refrigeration temperature for generating a control signal to disable the compressor clutch when refrigerant temperature exceeds desired low limits.

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