(19)
(11) EP 2 244 036 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 153(4) EPC

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
21.09.2011 Bulletin 2011/38

(43) Date of publication:
27.10.2010 Bulletin 2010/43

(21) Application number: 09710098.6

(22) Date of filing: 13.02.2009
(51) International Patent Classification (IPC): 
F25B 1/00(2006.01)
F25B 11/02(2006.01)
 F24F 11/02(2006.01)
(86) International application number:
PCT/JP2009/000578
(87) International publication number:
WO 2009/101818 (20.08.2009 Gazette 2009/34)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

(30) Priority: 15.02.2008 JP 2008034132

(71) Applicant: Panasonic Corporation
Kadoma-shi Osaka 571-8501 (JP)

(72) Inventors:
  • YAKUMARU, Yuichi
    Chuo-ku, Osaka 540-6207 (JP)
  • TANIGUCHI, Katsuji
    Chuo-ku, Osaka 540-6207 (JP)
  • HONMA, Masaya
    Chuo-ku, Osaka 540-6207 (JP)
  • MATSUMOTO, Subaru
    Chuo-ku, Osaka 540-6207 (JP)

(74) Representative: Ehlers, Jochen 
Eisenführ, Speiser & Partner Johannes-Brahms-Platz 1
20355 Hamburg
20355 Hamburg (DE)

   


(54) REFRIGERATION CYCLE DEVICE


(57) A refrigeration cycle apparatus (100) includes: a first compressor (101); a second compressor (102) connected in parallel with the first compressor (101) in a refrigerant circuit (200); a radiator (103) for cooling a refrigerant compressed by the first and second compressors; an expander (104) coupled to a rotation shaft of the first compressor (101); an evaporator (105) for evaporating the refrigerant expanded by the expander (104); and a controller (115). The controller (115) includes an efficiency enhancing means for performing a first process including a step of changing a rotation speed of the first compressor (101), as a process for increasing a coefficient of performance (COP) of the refrigeration cycle apparatus (100), when a temperature of a heat carrier flowing into the radiator (103) is in a predetermined temperature range, and for performing a second process including a step of changing a rotation speed of the second compressor (102), as a process for increasing the coefficient of performance, when the temperature of the heat carrier flowing into the radiator (103) is not in the predetermined temperature range.