Method for repairing HFC refrigerant system

Details Method for repairing HFC refrigerant system Method for repairing HFC refrigerant system

1995-08-22

1999-09-07

Doerrler, William

Refrigeration

Processes

Separating or preventing formation of undesirables

62 77, F25B 4700

Patent

active

059469218

ABSTRACT:
A combination of a chemical filter and a molecular sieve desiccant dryer are provided in the liquid line of the refrigeration system in a refrigerator which contains a chlorine-free hydrofluorocarbon refrigerant and a hygroscopic polyol ester compressor lubricant after a repair is made to the system and before it is recharged with fresh refrigerant. The chemical filter, such as activated alumina, filters out hydrolysis products of the lubricant and moisture which block the capillary tube, and the dryer removes moisture from system.

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Declaration of Joseph B. Hofelich, dated May 5, 1998, 2 pages.
Tecumseh Products Company--Guidelines For Utilization of R134a, 6 pages (Assume published prior to Aug., 1995)--note particularly Section IV C.

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