Method of filtering debris from refrigerant

Details Method of filtering debris from refrigerant Method of filtering debris from refrigerant

2007-02-13

2007-02-13

Savage, Matthew O. (Department: 1724)

Liquid purification or separation

Processes

Including controlling process in response to a sensed condition

C210S741000, C210S805000

Reexamination Certificate

active

10764894

ABSTRACT:
Debris is filtered from refrigerant in a refrigerant system by: (1) installing a filtration apparatus in the high pressure side of a refrigerant system, the apparatus comprising a filtration housing having primary and secondary passages, a primary filter disposed in the primary passage, and a diverter means for selectively directing refrigerant flow through either the primary or the secondary circuit passages; (2) directing refrigerant flow through the primary circuit passage; (3) operating the refrigerant system until a shifting parameter is obtained; and (4) operating the diverter means so as to direct refrigerant flow to the secondary circuit passage. Optionally, a secondary filter is disposed in the secondary filter channel. In alternate methods, the shifting parameter comprises one of: elapsed time of operation of the system; selected differential pressure across the primary filter; or a selected compressor discharge pressure above said normal compressor discharge pressure.

REFERENCES:
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patent: 5295367 (1994-03-01), Keltner
patent: 5390503 (1995-02-01), Cheng
patent: 6260372 (2001-07-01), Burke

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