(19)
(11) EP 2 639 516 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.03.2014 Bulletin 2014/13

(43) Date of publication A2:
18.09.2013 Bulletin 2013/38

(21) Application number: 13158797.4

(22) Date of filing: 12.03.2013
(51) International Patent Classification (IPC): 
F24D 19/10(2006.01)
 F25B 49/00(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: 12.03.2012 JP 2012054150

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

(72) Inventors:
  • Arashima, Hiroshi
    OSAKA, 540-6207 (JP)
  • Nishimura, Hideji
    OSAKA, 540-6207 (JP)

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

   


(54) Heat pump hydronic heater


(57) In a heat pump hydronic heater of the present invention, the control device 11a stops operation of the compressor 1 if the discharge pressure detected by the discharge pressure detecting means 1b is lower than a first set pressure and a discharge superheat degree detected by the discharge superheat degree detecting means is equal to or higher than a predetermined value when predetermined time is elapsed after the compressor 1 is started, or if the discharge pressure detected by the discharge pressure detecting means 1b is lower than a second set pressure which is set lower than the first set pressure. Therefore, it is possible to enhance usability without erroneously detecting leakage of a refrigerant.







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