(19)
(11) EP 2 354 743 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
31.10.2012 Bulletin 2012/44

(43) Date of publication A2:
10.08.2011 Bulletin 2011/32

(21) Application number: 11150467.6

(22) Date of filing: 10.01.2011
(51) International Patent Classification (IPC): 
F28D 7/10(2006.01)
 F28F 1/42(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: 15.01.2010 KR 20100004010

(71) Applicant: LG Electronics Inc.
Seoul 150-721 (KR)

(72) Inventors:
  • Kim, Hongseong
    153-801, Seoul (KR)
  • Lee, Sangyeul
    153-801, Seoul (KR)
  • Sa, Yongcheol
    153-801, Seoul (KR)
  • Lee, Hanchoon
    153-801, Seoul (KR)

(74) Representative: Vossius & Partner 
Siebertstrasse 4
81675 München
81675 München (DE)

   


(54) Double-pipe heat exchanger


(57) A double-pipe heat exchanger is provided. The double-pipe heat exchanger may include a first heat exchange tube having a first hollow portion, and a second heat exchange tube disposed inside the first heat exchange tube, so as to be co-axial with the first heat exchange tube and having a spiral part in which multiple ridges and grooves are formed at an inner surface of the spiral part.







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Search report