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Freezer oil and work fluid composition for freezer

A technology of refrigerating machine oil and working fluid, which is applied in the direction of lubricating compositions, petroleum industry, chemical instruments and methods, etc., and can solve problems such as poor lubrication, inability to obtain compatibility between refrigerant and refrigerating machine oil, and capillary blockage

Active Publication Date: 2011-09-21
JX NIPPON OIL & ENERGY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when conventionally used refrigeration oil for HFC refrigerants is used together with difluoromethane refrigerant, sufficient compatibility between the refrigerant and the refrigeration oil cannot be obtained, and the refrigeration oil discharged from the refrigerant compressor tends to remain in the During the cycle, as a result, the amount of refrigerating machine oil in the refrigerant compressor decreases, leading to poor lubrication, or problems such as blockage of expansion mechanisms such as capillary tubes.

Method used

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  • Freezer oil and work fluid composition for freezer
  • Freezer oil and work fluid composition for freezer
  • Freezer oil and work fluid composition for freezer

Examples

Experimental program
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Effect test

Embodiment 1～2 and comparative example 1～9

[0096] In Examples 1 to 2 and Comparative Examples 1 to 9, sample oils were prepared using base oils 1 to 11 shown below, respectively. Properties (kinetic viscosity at 40°C and 100°C, total acid value) of the obtained sample oils are shown in Tables 1-3.

[0097] (base oil)

[0098] Base oil 1: Hexaester of dipentaerythritol and 2-methylpentanoic acid

[0099] Base oil 2: mixture of dipentaerythritol and fatty acid (50 mol% of 2-methylvaleric acid, 50 mol% of 2-ethylbutyric acid)

[0100] Base oil 3: tetraester of pentaerythritol and n-valeric acid

[0101] Base oil 4: Hexaester of dipentaerythritol and n-valeric acid

[0102] Base oil 5: diester of neopentyl glycol and 2-methylpentanoic acid

[0103] Base oil 6: triesters of trimethylolpropane and 2-methylpentanoic acid

[0104] Base oil 7: Tetraester of pentaerythritol and 2-methylpentanoic acid

[0105] Base oil 8: tetraester of pentaerythritol and 2-ethylbutyric acid

[0106] Base oil 9: Hexaester of dipentaerythrito...

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Abstract

The invention discloses freezer oil and work fluid composition for a freezer. Freezer oil of the invention comprises more than 10 mass percentage ester based on total amount of freezer oil and used with dichloromethane refrigerant, wherein the ester is ester of dipentaerythritol and fatty acid; the proportion of 2-methyl valeric acid in fatty acid is more than 20 mol%. Moreover, work fluid composition for the freezer of the invention comprises freezer oil of the invention and dichloromethane refrigerant.

Description

technical field [0001] The present invention relates to a refrigerating machine oil and a working fluid composition for refrigerating machines, and more specifically, to a refrigerating machine oil useful when used together with difluoromethane refrigerant (HFC-32), and a refrigerating machine oil using the same A working fluid composition for a refrigerator. Background technique [0002] Due to the depletion of the ozone layer in recent years, CFC (chlorofluorocarbons) and HCFCs (hydrochlorofluorocarbons), which were previously used as refrigerants for refrigeration equipment, have been restricted, and instead of them, HFCs (hydrofluorocarbons) are being used as refrigerants. . [0003] When CFC and HCFC are used as refrigerants, hydrocarbon oils such as mineral oil and alkylbenzene can be appropriately used as refrigerating machine oils. Compatibility, lubricity, solution viscosity with refrigerants, thermal / chemical stability, and other unexpected behaviors require the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M105/38C10M169/04C09K5/04C10N40/30
Inventor 泷川克也斋藤正典大城户武
Owner JX NIPPON OIL & ENERGY CORP
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