Monitoring refrigerant charge

Details Monitoring refrigerant charge Monitoring refrigerant charge

2006-01-03

2006-01-03

Jones, Melvin (Department: 3744)

Refrigeration

Automatic control

Withdrawing or adding refrigerant from or to normally closed...

C062S077000

Reexamination Certificate

active

06981384

ABSTRACT:
An air conditioning, heating or refrigeration system includes a controller that automatically determines if refrigerant amount is above or below the desired amount within the system. In one example, a sensor measures the temperature difference between sub-cooled liquid and saturated condensing temperature and provides information to the controller. The controller determines a variance between the measured and an expected value. If that variance exceeds a selected threshold, the controller automatically determines that the amount of refrigerant in the system is outside of an acceptable range.

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