EP 0838643 A3 20001115 - 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
Application
Priority
- EP 94109583 A 19940621
- JP 15324693 A 19930624
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
IPC 8 full level
F25B 1/00 (2006.01); F25B 5/00 (2006.01); F25B 9/00 (2006.01); F25B 13/00 (2006.01)
CPC (source: EP)
F25B 9/006 (2013.01); F25B 13/00 (2013.01); F25B 2400/13 (2013.01); F25B 2400/16 (2013.01)
Citation (search report)
- [DA] US 5186012 A 19930216 - CZACHORSKI MAREK [US], et al
- [A] DE 3406588 A1 19850829 - SIEMENS AG [DE]
- [PA] WO 9407095 A1 19940331 - FRITZ EGGER GMBH [AT], et al
- [PA] EP 0586193 A1 19940309 - HITACHI LTD [JP]
- [A] US 3668882 A 19720613 - SARSTEN JAN A, et al
- [A] US 4913714 A 19900403 - OGURA KENJI [JP], et al
- [A] US 4961323 A 19901009 - KATSUNA KIYOHARU [JP], et al
- [A] US 4972676 A 19901127 - SAKAI TAKESHI [JP]
- [A] PATENT ABSTRACTS OF JAPAN vol. 17, no. 490 (M - 1474) 6 September 1993 (1993-09-06)
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
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
DOCDB simple family (application)
EP 94109583 A 19940621; DE 69422551 T 19940621; DE 69432489 T 19940621; EP 98101094 A 19940621; JP 15324693 A 19930624