Refrigerant recovery and recharging system
AssigneeRobinair Manufacturing Corporation
InventorsRalph C. Lower, Roger D. Shirley
Life of this patent
Estimating the term…
Abstract
The invention pertains to method and apparatus for servicing refrigeration circuits wherein the refrigerant is removed from the circuit and the circuit recharged. In accord with the invention the recovered refrigerant may be reprocessed for recharging the circuit, or the recovered refrigerant may be stored and fresh refrigerant employed for circuit charging purposes. Further, the invention contemplates the removal of oil from recovered refrigerant, and the charging of a predetermined amount of lubricating oil into the recharged circuit.
Claims11
The method of servicing a closed refrigeration system having a refrigerant containing an oil lubricant comprising the steps of evacuating the refrigerant from the refrigeration system, separating the oil from the refrigerant, automatically measuring the amount of oil removed from the evacuated refrigerant and automatically recharging the refrigeration system with an amount of oil lubricant substantially equal to the amount of oil separated from the evacuated refrigerant.
A refrigeration circuit refrigerant processing system comprising, in combination, a manifold conduit adapted to be connected to the refrigeration circuit to be serviced, a pump circuit communicating with said manifold conduit for drawing refrigerant therefrom, a pump within said pump circuit, an oil separator within said pump circuit, means directly associated with said oil separator for measuring the amount of oil separated from the refrigerant removed from the refrigeration circuit being serviced, and oil charging means communicating with said manifold conduit for introducing a predetermined amount of oil into the refrigeration circuit as determined by the amount of oil removed from the withdrawn refrigerant.
A refrigeration circuit refrigeration processing system comprising, in combination, a manifold conduit adapted to be connected to the refrigeration circuit to be serviced, a pump circuit communicating with said manifold conduit for drawing refrigerant therefrom, a pump within said pump circuit, an oil separator within said pump circuit, means for measuring the amount of oil separated from the refrigerant removed from the refrigeration circuit being serviced, and oil charging means communicating with said manifold conduit for introducing a predetermined amount of oil into the refrigeration circuit as determined by the amount of oil removed from the withdrawn refrigerant, a reservoir communicating with said pump, refrigerant metering and pump means selectively communicating with said reservoir and having an outlet selectively communicating with said manifold conduit, and refrigerant supply means selectively communicating with said metering and pump means.
Dependencies are inferred from the claim text.