(19)
(11) EP 0 440 316 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
15.01.1992 Bulletin 1992/03

(43) Date of publication A2:
07.08.1991 Bulletin 1991/32

(21) Application number: 91200905.7

(22) Date of filing: 08.07.1988
(51) International Patent Classification (IPC)5: F25B 45/00
(84) Designated Contracting States:
BE CH DE ES FR GB IT LI SE

(30) Priority: 04.11.1987 US 117098

(62) Application number of the earlier application in accordance with Art. 76 EPC:
88306260.6 / 0315296

(71) Applicant: SPX CORPORATION
Muskegon, Michigan 49443-3301 (US)

(72) Inventors:
  • Manz, Kenneth W.
    Paulding, Ohio 45879 (US)
  • Shirley, Roger D.
    W. Unity, Ohio 43570 (US)

(74) Representative: Singleton, Jeffrey et al
Eric Potter Clarkson St. Mary's Court St. Mary's Gate
Nottingham NG1 1LE
Nottingham NG1 1LE (GB)


(56) References cited: : 
   
     
    Remarks:
    This application was filed on 17 - 04 - 1991 as a divisional application to the application mentioned under INID code 60.
     


    (54) Refrigerant recovery and purification system


    (57) A self-contained portable refrigerant recovery system comprising a wheeled support (12); a refrigerant compressor (18) mounted on said support and having an inlet and an outlet; a heat exchange assembly (26) including refrigerant evaporator means and condenser means; means including a first pressure sensor (58) for connecting said compressor input through said evaporator means to a refrigeration system from which refrigerant is to be recovered, said first pressure sensor providing an electrical signal as a function of pressure of refrigerant to said evaporator means; a refrigerant storage container (50) which can be carried by said support; means connecting said compressor output to said refrigerant storage container through said condenser means; means (68) responsive to content of said container for sensing impending overfill of said container; and automatic refrigerant recovery control means mounted on said support and comprising a solenoid valve (28) for selectively admitting refrigerant to said evaporator means, means (121) responsive to operator actuation for selectively applying electrical power to said solenoid valve and said compressor, means (1CR-1) responsive to said first pressure sensor for removing power from said solenoid valve and said compressor, and means (1CR-2) responsive to said content-responsive means for inhibiting application of electrical power to said solenoid valve and said compressor when said container is in an impending overfill condition.






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