REFRIGERATING MACHINE WORKING FLUID COMPOSITION AND REFRIGERANT OIL

• US 20150008358A1
• Filed: 10/25/2012
• Published: 01/08/2015
• Est. Priority Date: 10/26/2011
• Status: Active Application

• Current Assignee: JX Nippon Oil & Energy Corporation (ENEOS Holdings, Inc.)
• Original Assignee: JX Nippon Oil & Energy Corporation (ENEOS Holdings, Inc.)
• Inventors: Saito, Masanori, Okido, Takeshi, Adegawa, Kuniko
• Granted Patent: US 10,273,394 B2
• Time in Patent Office: Days
• US Class Current: 252/68
• CPC Class Codes: C09K 2205/104 Carboxylic acid esters
• CPC Class Codes: C09K 2205/126 Unsaturated fluorinated hydrocarbons
• CPC Class Codes: C09K 2205/22 All components of a mixture being fluoro compounds
• CPC Class Codes: C09K 5/045 containing only fluorine as halogen
• CPC Class Codes: C10M 171/008 Lubricant compositions compatible with refrigerants
• CPC Class Codes: C10M 2207/2835 used as base material
• CPC Class Codes: C10M 2209/043 used as base material
• CPC Class Codes: C10N 2020/02 Viscosity; Viscosity index
• CPC Class Codes: C10N 2020/101 Containing Hydrofluorocarbons
• CPC Class Codes: C10N 2030/10 Inhibition of oxidation, e.g. anti-oxidants
• CPC Class Codes: C10N 2030/70 Soluble oils
• CPC Class Codes: C10N 2040/30 Refrigerators lubricants or compressors lubricants
• CPC Class Codes: F25B 1/00 Compression machines, plants or systems with non-reversible cycle F25B3/00, F25B5/00, F25B6/00, F25B7/00, F25B9/00 take precedence

Abstract

A working fluid composition for a refrigerating machine of the invention comprises a refrigerant comprising difluoromethane and an unsaturated fluorinated hydrocarbon wherein a mass of the difluoromethane/the unsaturated fluorinated hydrocarbon is 95/5 to 10/90, and a refrigerating machine oil comprising at least one base oil selected from among polyol esters with a carbon/oxygen molar ratio of 3.2 to 5.8 and polyvinyl ethers with a carbon/oxygen molar ratio of 3.2 to 5.8.

Claims

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

a refrigerant comprising difluoromethane and an unsaturated fluorinated hydrocarbon wherein a mass ratio of the difluoromethane/the unsaturated fluorinated is 95/5 to 10/90, and

a refrigerating machine oil comprising at least one base oil selected from among polyol esters with a carbon/oxygen molar ratio of 3.2 to 5.8 and polyvinyl ethers with a carbon/oxygen molar ratio of 3.2 to 5.8.

2. A working fluid composition for a refrigerating machine according to claim 1, wherein the total of the difluoromethane and the unsaturated fluorinated hydrocarbon in the refrigerant is 80 mass % or greater.

3. A working fluid composition for a refrigerating machine according to claim 1, wherein the mass ratio of the refrigerant/the refrigerating machine oil is 90/10 to 30/70.

4. A working fluid composition for a refrigerating machine according to claim 1, wherein the mass ratio of the difluoromethane/the unsaturated fluorinated hydrocarbon is 90/10 to 50/50.

5. A working fluid composition for a refrigerating machine according to claim 1, wherein the unsaturated fluorinated hydrocarbon is fluoropropene.

6. A working fluid composition for a refrigerating machine according to claim 1, wherein the base oil is a polyol ester with a carbon/oxygen molar ratio of 3.2 to 5.8, and the polyol ester is an ester synthesized from a C4 to C9 fatty acid and a C4 to C12 polyhydric alcohol.

7. A working fluid composition for a refrigerating machine according to claim 1, wherein the base oil is a polyvinyl ether with a carbon/oxygen molar ratio of 3.2 to 5.8, and the polyvinyl ether is a polyvinyl ether having a structural unit represented by the following formula (1).

8. A refrigerating machine oil, comprising at least one base oil selected from among polyol esters with a carbon/oxygen molar ratio of 3.2 to 5.8 and polyvinyl ethers with a carbon/oxygen molar ratio of 3.2 to 5.8, and

the refrigerating machine oil being used together with a refrigerant comprising difluoromethane and an unsaturated fluorinated hydrocarbon wherein a mass ratio of the difluoromethane/the unsaturated fluorinated hydrocarbon is 95/5 to 10/90.