US 12,228,135 B2
Refrigeration cycle apparatus
Arisa Kawae, Osaka (JP); Hideki Matsuura, Osaka (JP); Masaru Tanaka, Osaka (JP); and Haruka Terai, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed on Aug. 21, 2024, as Appl. No. 18/811,163.
Application 18/811,163 is a continuation of application No. PCT/JP2023/005964, filed on Feb. 20, 2023.
Claims priority of application No. 2022-025587 (JP), filed on Feb. 22, 2022.
Prior Publication US 2024/0410368 A1, Dec. 12, 2024
Int. Cl. F04C 29/02 (2006.01); C10M 171/00 (2006.01); F16C 33/10 (2006.01); F16C 33/12 (2006.01); F25B 9/00 (2006.01); F25B 31/02 (2006.01); C10N 40/30 (2006.01)
CPC F04C 29/02 (2013.01) [C10M 171/008 (2013.01); F16C 33/109 (2013.01); F16C 33/121 (2013.01); F25B 9/002 (2013.01); F25B 31/026 (2013.01); C10N 2040/30 (2013.01); F04C 2210/14 (2013.01); F04C 2210/145 (2013.01); F04C 2210/266 (2013.01); F04C 2240/50 (2013.01); F16C 2204/20 (2013.01); F16C 2362/52 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A refrigeration cycle apparatus comprising a refrigerant circuit in which a compressor, a heat radiator, an expansion mechanism, and a heat absorber are sequentially connected and a refrigerant is circulated,
wherein the compressor includes a sliding portion including a bearing or an Oldham ring,
at least one of two members slidable with each other in the sliding portion is formed of aluminum or aluminum alloy,
the refrigerant is a hydrocarbon-type refrigerant, and
a refrigerating machine oil used in the compressor has a refrigerant solubility of 30 wt % or less at a pressure of 1.9 MPa and at a temperature of 60° C.,
the refrigerating machine oil is a polyalkylene glycol having a hydroxy group ratio relative to all end groups of 40 mol % or more and 90 mol % or less,
the refrigerant is propane.