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.
Claims10
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, a condenser within said pump circuit liquifying refrigerant passing therethrough, a reservoir receiving said liquified refrigerant from said condenser, refrigerant purifying means selectively communicating with said reservoir for receiving refrigerant therefrom, heating means heating said refrigerant purifying means controlling the temperature of purified refrigerant, control means controlling said heating means, and a metering gear pump selectively communicating with said purifying means and said manifold conduit transferring refrigerant from said purifying means to said manifold conduit.
A refrigeration circuit refrigerant processing system comprising, in combination, a manifold conduit adapted to be connected to the refrigeration circuit to be serviced, a filter communicating with said manifold conduit, an evaporator communicating with said filter, an oil separator communicating with said evaporator, a recovery compressor having an inlet in communication with said oil separator and an outlet in communication with a condenser, a reservoir in communication with said condenser, a metering gear pump in selective communication with said reservoir, refrigerant purifying means in selective communication with said metering pump, a subcooler communicating with said purifier means and selectively communicating with said metering pump, conduit means selectively establishing communication between said metering pump and manifold conduit, valve means interposed between said manifold conduit and filter, between said reservoir and metering pump and purifying means, beween said subcooler and metering pump, and between said metering pump and manifold conduit, and automatic control means controlling said valve means.
Dependencies are inferred from the claim text.