Refrigerant filtration system with filter change indication

Details Refrigerant filtration system with filter change indication Refrigerant filtration system with filter change indication

1992-04-20

1993-05-18

Tanner, Harry B.

Refrigeration

With indicator or tester

Operatively correlated with automatic control

62129, 62149, 62195, 340607, F25B 4300

Patent

active

052110249

ABSTRACT:
Apparatus for purification of a single refrigerant type, or of differing refrigerant types having differing density and moisture solubility characteristics, that includes a filter/drier unit for removing water from refrigerant passing therethrough and having a predetermined water absorption capacity. A refrigerant pump, such as a refrigerant compressor, pumps refrigerant through the filter/drier unit during recovery of refrigerant from equipment under service and/or in a separate refrigerant purification cycle. A flow meter is coupled to the filer/drier unit for measuring volumetric flow of refrigerant passing through the filter/drier unit. Volumetric flow of refrigerant through the flow meter is monitored over time for indicating to an operator when the filter/drier unit should be replaced as a function of mass of refrigerant pumped through the filter/drier unit and independent of types of refrigerant pumped through the filter/drier unit. Operation of the refrigerant pump may be inhibited upon indication that the filter/drier unit should be replaced.

REFERENCES:
patent: 4476688 (1984-10-01), Goddard
patent: 4918426 (1990-04-01), Butts et al.
patent: 4942741 (1990-07-01), Hancock et al.
patent: 5033271 (1991-07-01), Manz et al.
patent: 5040382 (1991-08-01), Abraham
patent: 5076063 (1991-12-01), Kamegasawa et al.

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