(19)
(11) EP 0 838 643 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
15.11.2000 Bulletin 2000/46

(43) Date of publication A2:
29.04.1998 Bulletin 1998/18

(21) Application number: 98101094.5

(22) Date of filing: 21.06.1994
(51) International Patent Classification (IPC)7: F25B 49/02
(84) Designated Contracting States:
DE GB

(30) Priority: 24.06.1993 JP 15324693

(62) Application number of the earlier application in accordance with Art. 76 EPC:
94109583.8 / 0631095

(71) Applicant: HITACHI, LTD.
Chiyoda-ku, Tokyo (JP)

(72) Inventors:
  • Oguni, Kensaku
    Shimizu-shi (JP)
  • Urata, Kazumoto
    Shizuoka-shi (JP)
  • Muramatsu, Masatoshi
    Shimizu-shi (JP)
  • Endo, Takeshi
    Shimizu-shi, Shizuoka-ken (JP)
  • Matsushima, Hiroaki
    Ryugasaki-shi (JP)

(74) Representative: Finck, Dieter, Dr.Ing. et al
v. Füner Ebbinghaus Finck Hano Mariahilfplatz 2 - 3
81541 München
81541 München (DE)

   


(54) Refrigeration cycle using a non-azeotrope refrigerant


(57) A refrigeration cycle using a non-azeotrope refrigerant comprises a compressor (1), a heat-source-side heat exchanger (2), a use-side heat exchanger (20a, 20b), a refrigerant pressure reducing apparatus (7), a refrigerant receiver (6) disposed between a side of said heat-source-side heat exchanger (2) and said use-side heat exchanger (20a, 20b), whereby said side is opposite to another side of said heat-source-side heat exchanger (2) connected to said compressor (1), a composition ratio detecting means (8) arranged for detecting a composition ratio of the refrigerant, and composition ratio control means (10 to 15, 40 to 44). The composition ratio detecting means (8) is disposed between said heat-source-side heat exchanger (2) and said receiver (6). The composition ratio control means (10 to 15, 40 to 44) are arranged for taking out gas refrigerant from said receiver (6) on the basis of the composition ratio of the refrigerant detected by said composition ratio detecting means (8) so as to vary the refrigerant composition ratio mainly used in said refrigeration cycle.






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