Global Patent Index - EP 1028253 A2

EP 1028253 A2 2000-08-16 - Displacement control structure of variable displacement type compressor

Title (en)

Displacement control structure of variable displacement type compressor

Title (de)

Struktur eines Verdrängungskontrollsystems für einen variablen Verdrängungskompressor

Title (fr)

Structure d'un système de contrôle de capacité pour un compresseur à capacité variable

Publication

EP 1028253 A2 (EN)

Application

EP 00102697 A

Priority

JP 3289399 A

Abstract (en)

A variable displacement compressor includes a bleed passage (31) for connecting a crank chamber (15) to a suction chamber (24) and a supply passage (32) for connecting the crank chamber (15) to a discharge chamber (25). The supply passage (32) includes a fixed restriction (33). A buffer chamber (34) is located in the supply passage (32) between the fixed restriction (33) and the crank chamber (15). A first valve element (44) selectively opens and closes the supply passage (32) between the buffer chamber (34) and the crank chamber (15). A solenoid (42) actuates the first valve element (44) in response to a current. A second valve element (48) opens and closes the bleed passage (31). When the first valve element (44) closes the supply passage (32), the second valve element (48) opens the bleed passage (31). When the first valve element (44) is open, the second valve element (48) operates in accordance with the difference between the pressure in the crank chamber (15) and the pressure in the suction chamber. In this compressor, the displacement can be changed rapidly, the efficiency of the compressor is relatively high, and the pressure in the crank chamber (15) is limited. <IMAGE>

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

F04B 27/18

IPC 8 full level (invention and additional information)

F04B 49/06 (2006.01); F04B 27/14 (2006.01); F04B 27/18 (2006.01)

CPC (invention and additional information)

F04B 27/1804 (2013.01); F04B 2027/1813 (2013.01); F04B 2027/1827 (2013.01); F04B 2027/1831 (2013.01); F04B 2027/1854 (2013.01)

Citation (applicant)

None

Designated contracting state (EPC)

DE FR IT

EPO simple patent family

EP 1028253 A2 20000816; EP 1028253 A3 20010103; JP 2000230480 A 20000822

INPADOC legal status


2003-03-05 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20020903

2001-09-19 [AKX] PAYMENT OF DESIGNATION FEES

- Free text: DE FR IT

2001-01-03 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A3

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-01-03 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI

2000-08-16 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000209

2000-08-16 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

- Designated State(s): DE FR IT

2000-08-16 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI