(19)
(11) EP 2 320 164 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
05.02.2014 Bulletin 2014/06

(43) Date of publication A2:
11.05.2011 Bulletin 2011/19

(21) Application number: 10186449.4

(22) Date of filing: 04.10.2010
(51) International Patent Classification (IPC): 
F25B 40/02(2006.01)
(84) Designated Contracting States:
AL 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 RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 05.10.2009 JP 2009231660

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

(72) Inventors:
  • Aoyama, Shigeo
    Osaka 540-6207 (JP)
  • Moriwaki, Shunji
    Osaka 540-6207 (JP)
  • Okaza, Noriho
    Osaka 540-6207 (JP)
  • Isayama, Yasuhiko
    Osaka 540-6207 (JP)

(74) Representative: Eisenführ Speiser 
Patentanwälte Rechtsanwälte PartGmbB Postfach 31 02 60
80102 München
80102 München (DE)

   


(54) Refrigeration cycle apparatus and hot water heater


(57) A refrigeration cycle apparatus 1 includes: a refrigerant circuit 2 including a condenser 22 and a subcooling heat exchanger 23; and a bypass passage 3 that extends through the subcooling heat exchanger 23. In the bypass passage 3, a dryness fraction of the refrigerant that has flowed out of the subcooling heat exchanger 23 is adjusted. Since the subcooling heat exchanger 23 is configured appropriately, a ratio of an amount of heat exchange between, in the bypass passage 3, the refrigerant decompressed by the bypass expansion means 31 and the refrigerant passing through the refrigerant circuit 2 with respect to an amount of heat exchange between, in the condenser 22, the refrigerant that has flowed into the condenser 22 and a fluid to be heated falls in a specified range even during the operation using the adjusted dryness fraction. As a result, the subcooling effect of the subcooling heat exchanger 23 is secured.







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