US 12,253,315 B2
Air conditioner
Hiroyuki Nakano, Osaka (JP); and Shota Ago, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Appl. No. 18/693,336
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
PCT Filed May 23, 2022, PCT No. PCT/JP2022/021142
§ 371(c)(1), (2) Date Mar. 19, 2024,
PCT Pub. No. WO2023/053568, PCT Pub. Date Apr. 6, 2023.
Claims priority of application No. 2021-161628 (JP), filed on Sep. 30, 2021.
Prior Publication US 2024/0263895 A1, Aug. 8, 2024
Int. Cl. F28F 19/06 (2006.01); F24F 1/0003 (2019.01); F24F 1/0059 (2019.01); F24F 1/14 (2011.01)
CPC F28F 19/06 (2013.01) [F24F 1/0059 (2013.01); F24F 1/14 (2013.01); F24F 1/0003 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An air conditioner comprising:
an indoor unit including a first heat exchanger, in which a refrigerant exchanging heat with room air flows; and
an outdoor unit including a second heat exchanger in which a refrigerant exchanging heat with outdoor air flows,
the indoor unit and the outdoor unit connected with each other to condition air,
the first heat exchanger including a plurality of first heat transfer tubes made of aluminum or aluminum alloy,
the second heat exchanger including a plurality of second heat transfer tubes made of aluminum or aluminum alloy,
all of the first heat transfer tubes including first sacrificial layers formed on outer circumferential surfaces of the first heat transfer tubes,
all of the first heat transfer tubes including second sacrificial layers formed on outer circumferential surfaces of the second heat transfer tubes, and
all of the thicknesses of the second sacrificial layers being larger than any of the thicknesses of the first sacrificial layers.