(19)
(11) EP 4 644 804 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
21.01.2026 Bulletin 2026/04

(43) Date of publication A2:
05.11.2025 Bulletin 2025/45

(21) Application number: 25203327.9

(22) Date of filing: 28.11.2018
(51) International Patent Classification (IPC): 
F24F 1/0326(2019.01)
F25B 41/00(2021.01)
F24F 1/32(2011.01)
F25B 13/00(2006.01)
F25B 39/02(2006.01)
 F24F 13/20(2006.01)
F24F 1/0068(2019.01)
F25B 41/40(2021.01)
F25B 49/02(2006.01)
F25B 39/04(2006.01)
(52) Cooperative Patent Classification (CPC):
F24F 13/20; F24F 1/0068; F24F 1/32; F24F 1/0326; F25B 41/40; F25B 13/00; F25B 39/02; F25B 39/04
(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: 05.12.2017 JP 2017233170

(62) Application number of the earlier application in accordance with Art. 76 EPC:
18886031.6 / 3722686

(71) Applicant: Daikin Industries, Ltd.
Osaka-shi, Osaka 530-0001 (JP)

(72) Inventors:
  • MATSUMOTO, Yoshiyuki
    Osaka-Shi, Osaka 530-0001 (JP)
  • YOSHIOKA, Shun
    Osaka-Shi, Osaka 530-0001 (JP)

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

   


(54) AIR CONDITIONER


(57) An air conditioner in which galvanic corrosion of a connecting portion connecting pipes made of different types of metals can be easily reduced is provided. The air conditioner includes an outdoor unit having an outdoor heat exchanger; an indoor unit (20) having an indoor heat exchanger (25) and an indoor fan (28) that supplies air to the indoor heat exchanger; and a gas-refrigerant connection pipe (GP) and a liquid-refrigerant connection pipe (LP) that connect the outdoor unit and the indoor unit to each other . The air conditioner performs air-conditioning of a space to be air conditioned, in which the indoor unit is disposed, by circulating refrigerant in a refrigerant circuit including the outdoor heat exchanger, the indoor heat exchanger, and the connection pipes (GP, LP). The refrigerant circuit includes refrigerant pipes (21, 22) made of a metal material, the connection pipes (GP, LP) made of a metal material of a type different from a type of the metal material of the refrigerant pipes (21, 22), and connecting portions (21a, 22a) between the refrigerant pipes (21, 22) and the connection pipes (GP, LP). The connecting portions are disposed in an unventilated space (90).







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