Liquid refrigerant transfer method and system

Refrigeration – Processes – Assembling – charging – or repairing of refrigeration producer

Patent

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Details

62292, F25B 4500

Patent

active

050463209

ABSTRACT:
A liquid refrigerant transfer system includes a low-pressure liquid refrigerant pump coupled by drain hoses between a refrigeration system liquid refrigerant service or drain fitting and a liquid refrigerant storage tank. Another hose couples the refrigerant storage tank with a vapor refrigerant service or fill fitting of the refrigeration system. Preferably, a quick disconnect coupling is provided at least between the drain hose and the refrigerant storage tank to facilitate the removal of the filled tank and the substitution of a second, empty tank to continue the transfer. The vent hose carries liquid refrigerant vapor and any liquid refrigerant overflow back into the refrigeration system, thereby permitting substantially unattended use of the system. The system can be used to transfer liquid refrigerant back from the storage tank back into the refrigeration system through the drain opening.

REFERENCES:
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patent: 4363222 (1982-12-01), Cain
patent: 4476688 (1984-10-01), Goddard
patent: 4480446 (1984-11-01), Margulefsky et al.
patent: 4766733 (1988-08-01), Scuderi
patent: 4809515 (1989-03-01), Houwink
patent: 4856289 (1989-08-01), Lofland
patent: 4856290 (1989-08-01), Rodda
patent: 4934390 (1990-06-01), Sapp
patent: 4938031 (1990-07-01), Manz et al.

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