(19)
(11) EP 0 924 478 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
22.03.2000 Bulletin 2000/12

(43) Date of publication A2:
23.06.1999 Bulletin 1999/25

(21) Application number: 98630074.7

(22) Date of filing: 11.12.1998
(51) International Patent Classification (IPC)7: F25B 1/00, F25B 5/02, F25B 31/00, F25B 40/00
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 15.12.1997 US 991588
19.12.1997 US 994224

(71) Applicant: CARRIER CORPORATION
Syracuse New York 13221 (US)

(72) Inventors:
  • Fraser, Howard H., Jr.
    Lafayette, New York 13084 (US)
  • Lewis, Russell G.
    Manlius, New York 13104 (US)
  • Taras, Michael F.
    Fayetteville, New York 13066 (US)

(74) Representative: Weydert, Robert et al
Dennemeyer & Associates S.A. P.O. Box 1502
1015 Luxembourg
1015 Luxembourg (LU)

   


(54) Refrigeration system with integrated oil cooling heat exchanger


(57) The refrigeration system includes a substantially liquid refrigerant and an evaporator (22) for transferring heat from the air to the substantially liquid refrigerant. The substantially liquid refrigerant becomes a low temperature, low pressure first substantially gaseous refrigerant. A compressor (12) compresses the first substantially gaseous refrigerant into a high pressure, high temperature superheated second gaseous refrigerant. A lubricant circuit supplies lubricant to the compressor (12). A condenser (16) rejects heat from the second gaseous refrigerant and forms a high pressure, lower temperature sub-cooled liquid refrigerant. The condenser (16) has an output stream. A metering device (20) transforms the sub-cooled liquid refrigerant into the substantially liquid refrigerant for the evaporator (22). A heat exchanger (18) includes a coolant circuit for circulating coolant in a first coolant path on route to the compressor (12); a lubricant circuit (51) for circulating lubricant in a second lubricant path on route to said compressor (12) for cooling via heat exchange with said coolant, and a refrigerant circuit (49) for circulating said sub-cooled liquid refrigerant in a third refrigerant path on route to the metering device (20) for cooling via heat exchange with said coolant.






Search report