EP 0485873 B1 19940511 - Apparatus for recovering and purifying refrigerant.
Title (en)
Apparatus for recovering and purifying refrigerant.
Title (de)
Vorrichtung für Rückgewinnung und Reinigung von Kältemittel.
Title (fr)
Dispositif pour la récupération et la purification de réfrigérant.
Publication
Application
Priority
- US 61263890 A 19901113
- US 61264190 A 19901113
- US 61264290 A 19901113
- US 61264390 A 19901113
Abstract (en)
[origin: EP0485873A1] An apparatus (10) for recovering and purifying refrigerant contained in a refrigeration system has a first mode of operation wherein refrigerant is withdrawn from the system being serviced, compressed, condensed and delivered in liquid form to a refrigerant storage means (86). The pressure ratio across the recovery compressor (44) is monitored, and, when the pressure ratio exceeds a value above which the compressor (44) may be adversely affected withdrawal of the refrigerant from the refrigeration system is terminated. The system is then operated in a closed, cooling mode wherein refrigerant recovered from the system and stored in the storage means (86) is withdrawn therefrom by the compressor (44), compressed condensed, and expanded and returned to the storage means (86) to thereby lower the temperature and pressure of the storage means (86) and the refrigerant contained therein. Means for purifying (32) the withdrawn refrigerant are located upstream from the compressor suction port (42) so that refrigerant purification takes place during all modes of operation. When the temperature in the refrigerant storage cylinder (86) falls to a predetermined level the system is returned to the recovery mode. During the second recovery cycle, because of the substantially lower temperature in the recovery system (10), the refrigerant storage cylinder (86) effectively serves as a condenser. The system (10) may be operated in a liquid recovery cycle wherein liquid refrigerant is delivered directly to the storage means (86). The system (10) is shifted from liquid recovery to vapor recovery responsive to, either, a decrease in liquid level increase in the storage means (86), or, several system control parameters. Apparatus for sampling the purity (104) of refrigerant flowing through the recovery system is provided. <IMAGE>
IPC 1-7
IPC 8 full level
F25B 45/00 (2006.01)
CPC (source: EP KR)
F25B 43/00 (2013.01 - KR); F25B 45/00 (2013.01 - EP KR); F25B 2345/002 (2013.01 - EP)
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
EP 0485873 A1 19920520; EP 0485873 B1 19940511; AU 650919 B2 19940707; AU 8778691 A 19920514; CA 2053929 A1 19920514; CA 2053929 C 19940503; DE 69101964 D1 19940616; DE 69101964 T2 19941215; ES 2053261 T3 19940716; JP H04268178 A 19920924; KR 920010231 A 19920626; KR 950014471 B1 19951128
DOCDB simple family (application)
EP 91118875 A 19911106; AU 8778691 A 19911112; CA 2053929 A 19911022; DE 69101964 T 19911106; ES 91118875 T 19911106; JP 32530791 A 19911113; KR 910020086 A 19911112