WORKING FLUID COMPOSITION FOR REFRIGERATOR, AND REFRIGERATOR OIL

• Main Authors: MUTO, Masataka, KANO, Takekazu, YAMAMOTO, Kazuki, SAWADA, Ken, HAYASHI, Genki, HOSHIDA, Takahiro, TAKAHASHI, Hitoshi, MUKAWA, Hajime, TADA, Akira, KONNO, Souichirou
• Format: Patent
• Language: English; French; German
• Published: 23.01.2019
• Subjects: ADHESIVES; CHEMISTRY; DYES; FUELS; INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS; LUBRICANTS; LUBRICATING COMPOSITIONS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; POLISHES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION

The present invention provides a working fluid composition for a refrigerating machine, comprising a refrigerating machine oil that comprises an ester of a polyhydric alcohol and a fatty acid, an epoxy compound, and a phosphorus compound, and a fluoropropene refrigerant, wherein the polyhydric alcohol constituting the ester comprises pentaerythritol and dipentaerythritol, the fatty acid constituting the ester comprises at least one selected from fatty acids having 4 to 9 carbon atoms, and the epoxy compound and the phosphorus compound satisfy a condition represented by the following formula (1). [Formula 1] 0.10 ‰¦ N E M E ‹ W E N P M P ‹ W P ‰¦ 1.50