Refrigerant recovery and recycling method and apparatus

Refrigeration – Processes – Separating or preventing formation of undesirables

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Details

62149, 62292, 62 77, 62195, 62475, 62470, F25B 4500

Patent

active

053636627

ABSTRACT:
A portable refrigerant recovery and recycling apparatus and method for removing and recycling chloroflourocarbon (CFC), hydroflourocarbon (HFC) and hydrochloroflourocarbon (HCFC) refrigerants from refrigeration systems through a closed loop connection which prevents the release of refrigerant to the atmosphere. A refrigerant is drawn by suction through a filter in its liquid state and transferred to a storage tank. When all liquid refrigerant has been so transferred, a refrigerant vapor recovery process automatically engages and retrieves and condenses the remaining refrigerant vapors, thus completing evacuation of the closed loop refrigeration system until the refrigeration system is evacuated to a pressure of approximately 29 inches Hg absolute for low pressure refrigeration systemes and 20 inches Hg absolute for high pressure refrigeration systems, at which time 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:
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patent: 4805416 (1989-02-01), Manz et al.
patent: 4934390 (1990-06-01), Sapp
patent: 5020331 (1991-06-01), Michny
patent: 5022230 (1991-06-01), Todack
patent: 5046320 (1991-09-01), Michny
patent: 5086630 (1992-02-01), Van Steenburgh, Jr.
patent: 5090211 (1992-02-01), Peters
patent: 5167126 (1992-12-01), Cartwright
patent: 5168721 (1992-12-01), Hancock et al.
patent: 5182918 (1993-02-01), Manz et al.
patent: 5193351 (1993-03-01), Laukhuf et al.
Data Sheet-Portable Refrigerant Recycle/Recovery System by Trane Company, 1991.
Data Sheet-Recycle/Recovery System by Trane Company, 1990.
Data Sheet-LIQUI/Jector by Osmonics, 1991.

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