	US 12,344,811 B2
	Refrigerator oil and working fluid composition for refrigerator
Fumiyuki Nara, Tokyo (JP); Yohei Shono, Tokyo (JP); and Hidetoshi Ogata, Tokyo (JP)
Assigned to ENEOS CORPORATION, Tokyo (JP)
Appl. No. 18/266,948
Filed by ENEOS Corporation, Tokyo (JP)
PCT Filed Dec. 20, 2021, PCT No. PCT/JP2021/047024 § 371(c)(1), (2) Date Jun. 13, 2023, PCT Pub. No. WO2022/138560, PCT Pub. Date Jun. 30, 2022.
Claims priority of application No. 2020-214689 (JP), filed on Dec. 24, 2020.
Prior Publication US 2023/0365886 A1, Nov. 16, 2023
Int. Cl. C10M 169/04 (2006.01); C09K 5/04 (2006.01); C10M 101/02 (2006.01); C10M 137/10 (2006.01); C10N 30/06 (2006.01); C10N 40/30 (2006.01)

CPC C10M 169/04 (2013.01) [C09K 5/042 (2013.01); C10M 101/02 (2013.01); C10M 137/105 (2013.01); C09K 2205/12 (2013.01); C10M 2203/1025 (2013.01); C10M 2223/041 (2013.01); C10M 2223/047 (2013.01); C10N 2030/06 (2013.01); C10N 2040/30 (2013.01)]

11 Claims

1. A working fluid composition for a refrigerating machine, comprising:

a refrigerating machine oil comprising a hydrocarbon base oil having a 90% distillation temperature of 270° C. or lower and a distillation end point of 295° C. or lower; and

a refrigerant,

wherein the refrigerating machine oil has a difference between a 90% distillation temperature and a 10% distillation temperature of 5° C. or higher and 20° C. or lower, and wherein the hydrocarbon base oil has a density at 15° C. of 0.81 g/cm³or more.