(19)
(11) EP 2 428 754 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
23.10.2013 Bulletin 2013/43

(43) Date of publication A2:
14.03.2012 Bulletin 2012/11

(21) Application number: 11174744.0

(22) Date of filing: 20.07.2011
(51) International Patent Classification (IPC): 
F25B 47/02(2006.01)
 F25B 13/00(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: 03.08.2010 JP 2010174596

(71) Applicant: AISIN SEIKI KABUSHIKI KAISHA
Kariya-shi, Aichi-ken 448-8650 (JP)

(72) Inventor:
  • Nakaya, Noritaka
    Kariya-shi, Aichi-ken,, 448-8650 (JP)

(74) Representative: Winter, Konrad Theodor 
Winter, Brandl, Fürniss, Hübner, Röss, Kaiser, Polte - Partnerschaft Patent- und Rechtsanwaltskanzlei Bavariaring 10
80336 München
80336 München (DE)

   


(54) Idle defrosting operation determining device for air conditioning apparatus


(57) An air conditioning apparatus (1) includes a refrigeration cycle including a compressor (11), an indoor heat exchanger (16), a pressure reducer (17) and an outdoor heat exchanger (15), that constitute a fluid circuit for circulating a cooling medium, the outdoor heat exchanger serving as an evaporator when a heating operation is performed and as a condenser when a defrosting operation is performed, and an idle defrosting operation determining device (20) including a temperature detecting device (21) detecting a pipe temperature (T) of the outdoor heat exchanger, a low temperature integrated value calculating means (20) calculating a low temperature integrated value (A), a high temperature integrated value calculating means (20) calculating a high temperature integrated value (B), and a determining means (20) determining whether or not the idle defrosting operation is carried out based on a relationship between the low temperature integrated value and the high temperature integrated value.










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