| (19) |
 |
|
(11) |
EP 1 130 261 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
02.04.2003 Bulletin 2003/14 |
| (43) |
Date of publication A2: |
|
05.09.2001 Bulletin 2001/36 |
| (22) |
Date of filing: 20.02.2001 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
Designated Extension States: |
|
AL LT LV MK RO SI |
| (30) |
Priority: |
24.02.2000 US 512001
|
| (71) |
Applicant: Visteon Global Technologies, Inc. |
|
Dearborn, Michigan 48126-2490 (US) |
|
| (72) |
Inventor: |
|
- Huang, Yong
Ann Arbor, MI 48105 (US)
|
| (74) |
Representative: Copp, David Christopher et al |
|
Dummett Copp, 25 The Square, Martlesham Heath
Ipswich, Suffolk, IP5 3SL
Ipswich, Suffolk, IP5 3SL (GB) |
|
| |
|
| (54) |
Refrigeration circuit for vehicular air conditioning systems |
(57) A vehicular air conditioning system (10) includes a compressor (110) having a crank
chamber (138), a suction chamber (120), and a discharge chamber (122). A refrigerant
mixture includes carbon dioxide and oil. A conduit (13) connects the discharge chamber
(122) of the compressor (110) directly with an oil separator (14) to route the refrigerant
mixture directly to the oil separator (14). Only a restricted orifice (16) is provided
between the oil separator (14) and the crank chamber (138) of the compressor (110)
to throttle oil as it travels directly to the crank chamber (138) of the compressor
(110).