Apparatus and method for purification and recovery of refrigeran

Gas separation – Means within gas stream for conducting concentrate to collector

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Details

62 77, 62292, 62195, 55 23, 55268, 55274, B01D 5000

Patent

active

050787560

ABSTRACT:
A refrigerant purification and recovery apparatus for removing refrigerant from a refrigeration unit and for purifying the refrigerant removed from the refrigeration unit includes a compressor, condenser, a receiver-separator vessel having upper and lower end portions, pressure detection means for generating signals indicative of a pressure in the upper end portion of the receiver-separator vessel, liquid detection means for generating a signal indicative of the presence or absence of liquid in the vessel at a position between the upper and lower end portions, means for venting gas from the upper end portion of the receiver-separator vessel, means for draining liquid from the lower end portion of the receiver-separator vessel, and control-signal means for receiving the pressure indicative and liquid-presence indicative signals and generating a drain signal only when the pressure indicative signal is indicative of a pressure greater than a predetermined pressure and the liquid presence indicative signal is indicative of a liquid present, and generating a vent signal only when the pressure indicative signal is indicative of a pressure greater than a predetermined pressure and the liquid presence indicative signal is indicative of no liquid present.

REFERENCES:
patent: 2998096 (1961-08-01), Snipes
patent: 3216648 (1965-11-01), Ford
patent: 3844131 (1974-10-01), Gianni et al.
patent: 4167102 (1979-09-01), Willitts
patent: 4285206 (1981-08-01), Koser
patent: 4304102 (1981-12-01), Gray
patent: 4476307 (1984-10-01), Goddard
patent: 4805416 (1989-02-01), Manz et al.
patent: 4809520 (1989-03-01), Manz et al.
WO89/06336, 7/13/89, Merritt et al. & copy in class 62-149.

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