Global Patent Index - EP 0838643 A3

EP 0838643 A3 2000-11-15 - Refrigeration cycle using a non-azeotrope refrigerant

Title (en)

Refrigeration cycle using a non-azeotrope refrigerant

Title (de)

Kältekreislauf mit nicht-azeotropem Kältemittel

Title (fr)

Cycle frigorifique utilisant un frigorigène non-azéotropique

Publication

EP 0838643 A3 (EN)

Application

EP 98101094 A

Priority

  • EP 94109583 A
  • JP 15324693 A

Abstract (en)

[origin: EP0631095A2] The composition of a refrigerant within the refrigeration cycle in which a non-azeotrope refrigerant is used is controlled to a predetermined composition. Further, the amount of the refrigerant is detected, and the composition and amount of the refrigerant within the refrigeration cycle are displayed, facilitating the maintenance of the refrigerant. The refrigeration cycle includes a compressor (1), a heat-source-side heat exchanger (2), use-side heat exchangers (20a,20b), and a pressure reducing apparatus (7,21a,21b), in which cycle a non-azeotrope refrigerant is used as a refrigerant. The refrigeration cycle further includes a sensor (8), disposed in a pipe portion where a liquid phase is formed, for detecting the composition of the non-azeotrope refrigerant circulating within the refrigeration cycle, and devices (5,6,10) for controlling the composition to a predetermined composition, a sensor for detecting the amount of refrigerant and a device for displaying the amount of the refrigerant. Since the composition of the refrigerant circulating within the refrigeration cycle is detected and control appropriate for the detected composition is performed, it becomes possible to perform a stable operation even when the refrigerant leaks outside and the composition of the refrigerant varies.

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

F25B 49/02

IPC 8 full level (invention and additional information)

F25B 1/00 (2006.01); F25B 5/00 (2006.01); F25B 9/00 (2006.01); F25B 13/00 (2006.01)

CPC (invention and additional information)

F25B 9/006 (2013.01); F25B 13/00 (2013.01); F25B 2400/13 (2013.01); F25B 2400/16 (2013.01)

Citation (search report)

Designated contracting state (EPC)

DE GB

EPO simple patent family

EP 0631095 A2 19941228; EP 0631095 A3 19950301; EP 0631095 B1 20000112; DE 69422551 D1 20000217; DE 69422551 T2 20000803; DE 69432489 D1 20030515; DE 69432489 T2 20040212; EP 0838643 A2 19980429; EP 0838643 A3 20001115; EP 0838643 B1 20030409; JP H0712411 A 19950117

INPADOC legal status


2006-03-01 [GBPC] GB: EUROPEAN PATENT CEASED THROUGH NON-PAYMENT OF RENEWAL FEE

- Ref Legal Event Code: GBPC

- Effective date: 20050621

2006-01-03 [PG25 DE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: DE

- Ref Legal Event Code: PG25

- Free Format Text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20060103

2005-06-21 [PG25 GB] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: GB

- Ref Legal Event Code: PG25

- Free Format Text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20050621

2004-06-08 [PGFP DE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: DE

- Ref Legal Event Code: PGFP

- Payment date: 20040608

- Year of fee payment: 11

2004-05-26 [PGFP GB] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

- Ref Country Code: GB

- Ref Legal Event Code: PGFP

- Payment date: 20040526

- Year of fee payment: 11

2004-03-31 [26N] NO OPPOSITION FILED

- Ref Legal Event Code: 26N

- Effective date: 20040112

2003-04-09 [AC] DIVISIONAL APPLICATION (ART. 76) OF:

- Ref Legal Event Code: AC

- Ref Document Number: 0631095

- Country of Ref Document: EP

- Kind Code of Ref Document: P

2003-04-09 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE GB

2003-04-09 [REG GB FG4D] EUROPEAN PATENT GRANTED

- Ref Legal Event Code: FG4D

2000-11-15 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE GB

1998-07-29 [RIN1] INVENTOR (CORRECTION)

- Ref Legal Event Code: RIN1

- Inventor name: OGUNI, KENSAKU

1998-07-29 [RIN1] INVENTOR (CORRECTION)

- Ref Legal Event Code: RIN1

- Inventor name: URATA, KAZUMOTO

1998-07-29 [RIN1] INVENTOR (CORRECTION)

- Ref Legal Event Code: RIN1

- Inventor name: MURAMATSU, MASATOSHI

1998-07-29 [RIN1] INVENTOR (CORRECTION)

- Ref Legal Event Code: RIN1

- Inventor name: ENDO, TAKESHI

1998-07-29 [RIN1] INVENTOR (CORRECTION)

- Ref Legal Event Code: RIN1

- Inventor name: MATSUSHIMA, HIROAKI

1998-04-29 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19980122

1998-04-29 [AC] DIVISIONAL APPLICATION (ART. 76) OF:

- Ref Legal Event Code: AC

- Ref Document Number: 631095

- Country of Ref Document: EP

1998-04-29 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE GB