Refrigeration – Processes – Separating or preventing formation of undesirables
Patent
1994-07-29
1998-01-20
Sollecito, John M.
Refrigeration
Processes
Separating or preventing formation of undesirables
62292, 62149, 62 77, 62475, 62470, F25B 4500
Patent
active
057090912
ABSTRACT:
A portable refrigerant recovery and recycling system for removing and recycling chloroflourocarbon (CFC), hydroflourocarbon (HFC) and hydrochloroflourocarbon (HCFC) refrigerants from refrigeration systems. Closed loop interconnection prevents release of refrigerant to the atmosphere. Liquid refrigerant is drawn by suction through a filter and transferred to a storage tank. When all liquid refrigerant has been transferred, a refrigerant vapor recovery process automatically engages, retrieves and condenses the remaining refrigerant vapors, thus evacuating the refrigeration system to a pressure of approximately 29 inches Hg absolute for low pressure refrigeration systems and 15 inches Hg absolute for high pressure refrigeration systems. After evacuation of the refrigeration system, the present invention automatically shuts off. By re-configuring connections to the refrigeration and storage system the stored refrigerant may be recycled through a distillation process which removes oil, water, acids and other solid particles. The distilled refrigerant is then recondensed and passed through high efficiency filters which further removes moisture and acids, thus rendering the refrigerant suitable for reuse.
REFERENCES:
patent: 5363662 (1994-11-01), Todack
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