(19)
(11) EP 0 715 134 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
21.01.1998 Bulletin 1998/04

(43) Date of publication A2:
05.06.1996 Bulletin 1996/23

(21) Application number: 95117514.0

(22) Date of filing: 07.11.1995
(51) International Patent Classification (IPC)6: F25B 13/00, F25B 49/02, C09K 5/04
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 29.11.1994 JP 295320/94

(71) Applicant: SANYO ELECTRIC CO. LTD
Moriguchi-shi, Osaka 570 (JP)

(72) Inventor:
  • Ishikawa, Atuyumi
    Ohta-shi, Gunma (JP)

(74) Representative: Glawe, Delfs, Moll & Partner 
Patentanwälte Postfach 26 01 62
80058 München
80058 München (DE)

   


(54) Refrigerating cycle


(57) In a refrigerating cycle (air conditioner) using mixture refrigerant, a mixing ratio of the refrigerant in a refrigerant circuit is measured by a mixing ratio detector (W1), and a controller (21) receives the detection signal to open a control valve (13) when the mixing ratio of a high boiling-point refrigerant component is low, whereby the high boiling-point refrigerant stocked in a liquid reservoir (14) is returned to the refrigerant circuit. The high boiling-point refrigerant which is supplied from the liquid reservoir (14) through the opening operation of the control valve (13) is supplied from a low pressure side of a compressor (1) into the refrigerant circuit to keep the mixing ratio of the refrigerant circulating in the refrigerant circuit to a predetermined value, thereby preventing abnormal increase of pressure of the refrigerant due to variation of the mixing ratio.






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