Refrigerator oil and working fluid composition for refrigerator

Patent metadata

Field	Value
Publication number	US-12344811-B2
Application number	US-202118266948-A
Country	US
Kind code	B2
Filing date	Dec 20, 2021
Priority date	Dec 24, 2020
Publication date	Jul 1, 2025
Grant date	Jul 1, 2025

Abstract

A refrigerating machine oil containing a hydrocarbon base oil having a 90% distillation temperature of 270° C. or lower.

First claim

The invention claimed is:

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/cm 3 or more.

2. The working fluid composition according to claim 1 , wherein the hydrocarbon base oil has an initial boiling point of 140° C. or higher.

3. The working fluid composition according to claim 1 , wherein the refrigerating machine oil further comprises a phosphorus-containing antiwear agent.

4. The working fluid composition according to claim 1 , wherein the refrigerating machine oil has a flash point of 70° C. or higher.

5. A working fluid composition, 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 40° C. or lower, and
wherein a content of a hydrocarbon having 12 to 16 carbon atoms in a hydrocarbon base oil contained in the refrigerating machine oil is 80% by mass or more, and wherein the hydrocarbon base oil has a density at 15° C. of 0.81 g/cm 3 or more.

6. The working fluid composition according to claim 1 , wherein a content of a n-paraffin in a hydrocarbon base oil contained in the refrigerating machine oil is 5% by mass or more and 50% by mass or less.

7. The working fluid composition according to claim 1 , wherein the refrigerating machine oil has a 90% distillation temperature of 270° C. or lower.

8. The working fluid composition for a refrigerating machine oil of claim 1 , wherein the refrigerant comprises a hydrocarbon.

9. The working fluid composition according to claim 1 , wherein the hydrocarbon base oil has a density at 15° C. of 0.82 g/cm 3 or more.

10. The working fluid composition according to claim 1 , wherein a content of a n-paraffin in the hydrocarbon base oil is 9.6% by mass or less.

11. The working fluid composition according to claim 1 , wherein the difference between the 90% distillation temperature and the 10% distillation temperature is 5° C. or higher and 15° C. or lower.

Assignees

• Eneos Corp

Inventors

• Nara Fumiyuki
• SHONO Yohei
• Ogata Hidetoshi

Classifications

• C10N2040/30

  Refrigerators lubricants {or compressors lubricants} · CPC title

• C10N2030/06

  Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure · CPC title

• C10M2223/047

  Thioderivatives not containing metallic elements · CPC title

• C10M2223/041

  Triaryl phosphates · CPC title

• C10M2203/1025

  used as base material · CPC title