Refrigerant handling system with air purge and multiple refriger

Details Refrigerant handling system with air purge and multiple refriger Refrigerant handling system with air purge and multiple refriger

1993-03-08

1994-02-15

Tanner, Harry B.

Refrigeration

With indicator or tester

Diverse function indicators or testers

62129, 62195, F25B 4304

Patent

active

052856470

ABSTRACT:
A refrigerant handling system that includes a closed vessel for storing refrigerant and an apparatus for determining quantity of air captured within the vessel. A first sensor is operatively coupled to the vessel for providing a first electrical signal as a function of air/refrigerant vapor pressure within the vessel, and a second sensor is operatively coupled to the vessel for providing a second electrical signal as a function of air/refrigerant vapor temperature within the vessel. A microprocessor-based controller has internal memory in which electronic indicia is stored for relating saturation pressure to temperature for multiple types of refrigerant. This stored electronic indicia is employed in conjunction with the first and second sensor signals to determine quantity of air within the vessel as a function of a difference between pressure indicated by the first sensor signal and the saturation pressure indicia at the temperature indicated by the second sensor signal. Air is purged from the vessel, either automatically or manually, when quantity of air so indicated exceeds a predetermined threshold.

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