Global patent index - EP 1088991 A1

EP 1088991 A1 2001-04-04 - VARIABLE DISPLACEMENT SWASH PLATE TYPE CLUTCHLESS COMPRESSOR

Title (en)

VARIABLE DISPLACEMENT SWASH PLATE TYPE CLUTCHLESS COMPRESSOR

Title (de)

TAUMELSCHEIBENKOMPRESSOR OHNE KUPPLUNG

Title (fr)

COMPRESSEUR SANS EMBRAYAGE DU TYPE A PLATEAU OSCILLANT A DEPLACEMENT VARIABLE

Publication

EP 1088991 A1 (EN)

Application

EP 99925334 A

Priority

  • JP 9903203 W
  • JP 18558298 A

Abstract (en)

When thermal load becomes low, a passage 58 is opened by a control valve 81, whereby the pressure within a crankcase 8 is increased to reduce the inclination angle of a swash plate 10. When the inclination angle of the swash plate 10 becomes minimum, the cross-sectional area of a second passage 57 is reduced by the swash plate 10, whereby the pressure within the crankcase 8 is prevented from being decreased. On the other hand, when the pressure within the crankcase 8 is increased, a refrigerant outlet passage 39a is closed by a check valve 31 serving as a discharge control valve. In view of the fact that the differential pressure between the crankcase 8 and a discharge chamber 12 is smaller and more stable than that between a suction chamber 13 and the discharge chamber 12, the compressor is constructed such that the pressure from the crankcase 8 is caused to act on one side of the check valve 31 serving as a discharge control valve, while the pressure from the discharge chamber 12 is caused to act on the other side of a valve element 31 of the check valve 30, so that it is possible to employ a spring having a relatively small spring force as a spring 32 for urging the spool valve 31 in a valve-closing direction. As a result, even when the pressure within the discharge chamber is progressively lowered with decrease in the thermal load, it is possible to keep the check valve 31 open until the compressor enters the minimum piston stroke condition (extremely low-load operating condition) in which the swash plate 10 reduces the passage area of the first passage. <IMAGE>

IPC 1-7 (main, further and additional classification)

F04B 27/08

IPC 8 full level (invention and additional information)

F04B 27/18 (2006.01); F04B 49/22 (2006.01)

CPC (invention and additional information)

F04B 27/1804 (2013.01); F04B 49/225 (2013.01); F04B 2027/1813 (2013.01); F04B 2027/1827 (2013.01); F04B 2027/1831 (2013.01); F04B 2027/185 (2013.01); F04B 2027/1854 (2013.01); F04B 2027/1859 (2013.01); F04B 2027/1872 (2013.01)

Citation (search report)

See references of WO 9966203A1

Designated contracting state (EPC)

DE FR

EPO simple patent family

WO 9966203 A1 19991223; EP 1088991 A1 20010404

INPADOC legal status

2003-08-13 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20030103

2001-04-25 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: ZEXEL VALEO CLIMATE CONTROL CORPORATION

- Ref Legal Event Code: RAP1

2001-04-04 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000628

2001-04-04 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE FR