(19)
(11) EP 2 535 674 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
20.05.2015 Bulletin 2015/21

(43) Date of publication A2:
19.12.2012 Bulletin 2012/51

(21) Application number: 12171898.5

(22) Date of filing: 14.06.2012
(51) International Patent Classification (IPC): 
F25B 49/02(2006.01)
 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: 17.06.2011 JP 2011134878

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

(72) Inventors:
  • Moriwaki, Shunji
    Chuo-ku, Osaka, 540-6207 (JP)
  • Aoyama, Shigeo
    Chuo-ku, Osaka, 540-6207 (JP)
  • Kusaka, Michiyoshi
    Chuo-ku, 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 hydronic heater having the refrigeration cycle apparatus


(57) A refrigeration cycle apparatus of the present invention includes a first temperature sensor (61), a pressure sensor (51), a second temperature sensor (62), and a control device (4). The control device (4) controls operation of a bypass expansion valve (31) such that a temperature at an outlet of the bypass passage (3) becomes equal to a saturation temperature in a section until a number of rotation of the compressor (21) reaches a predetermined compressor target number of rotations after the compressor (21) is actuated. When the temperature at the outlet of the bypass passage (3) reaches the saturation temperature, the control device (4) increases the number of rotation of the compressor (21) to a number of rotations of a next stage, and the control device (4) controls the refrigeration cycle into an appropriate refrigeration cycle state.







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