(19)
(11) EP 3 147 622 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
Note: Bibliography reflects the latest situation

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

(48) Corrigendum issued on:
07.06.2017 Bulletin 2017/23

(88) Date of publication A3:
29.03.2017 Bulletin 2017/13

(43) Date of publication:
29.03.2017 Bulletin 2017/13

(21) Application number: 16189439.9

(22) Date of filing: 25.04.2013
(51) International Patent Classification (IPC): 
F28F 9/02(2006.01)
F28D 1/053(2006.01)
F28F 17/00(2006.01)
 F25B 39/02(2006.01)
F28F 9/22(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

(30) Priority: 27.04.2012 JP 2012103170

(62) Application number of the earlier application in accordance with Art. 76 EPC:
13781317.6 / 2860483

(71) Applicant: DAIKIN INDUSTRIES, LTD.
Osaka-shi, Osaka 530-8323 (JP)

(72) Inventors:
  • Jindou, Masanori
    Osaka, 530-8323 (JP)
  • Oritani, Yoshio
    Osaka, 530-8323 (JP)
  • Kazusa, Takuya
    Osaka, 530-8323 (JP)
  • Kikuchi, Yoshimasa
    Osaka, 530-8323 (JP)
  • Yoshioka, Shun
    Osaka, 530-8323 (JP)

(74) Representative: Hoffmann Eitle 
Patent- und Rechtsanwälte PartmbB Arabellastraße 30
81925 München
81925 München (DE)

 
Remarks:
This application was filed on 19-09-2016 as a divisional application to the application mentioned under INID code 62.
 


(54) HEAT EXCHANGER


(57) A heat exchanger (23) includes a plurality of principal heat exchange sections (51a- 5 1 c) and auxiliary heat exchange sections (52a-52c). A first header-collecting pipe (60) 5 includes an upper space (61) communicating with flat tubes (33) of all of the principal heat exchange sections (51a-51c). Each of the auxiliary heat exchange sections (52a-52c) is in series connection to a corresponding one of the principal heat exchange sections (51a-51c). Of tube number ratios of the number of the flat tubes (33) constituting each of the heat exchange sections (51a-51c) to the number of the flat tubes (33) constituting a corresponding 10 one of the auxiliary heat exchange sections (52a-52c), the first principal heat exchange sections (51a) which is the lowermost one has the smallest tube number ratio. Consequently, discharge of liquid refrigerant from a lower portion of the first principal heat exchange section (5 1 a) is accelerated during defrosting, thereby shortening the time required for defrosting.