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Refrigeration oil, working fluid composition and refrigeration cycle device

A technology for refrigerating machine oil and working fluid, which is applied in lubricating compositions, refrigerators, and the petroleum industry. Engine oil selection, the effect of satisfying long-term durability

Active Publication Date: 2022-07-12
ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: the refrigerating cycle device using R32 refrigerant uses refrigerating machine oil that is incompatible or intermediately soluble with the refrigerant, so that the refrigerating machine oil has poor oil return performance in the refrigerating cycle system, resulting in the internal freezing of the compressor. Reduced oil volume causing poor lubrication

Method used

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  • Refrigeration oil, working fluid composition and refrigeration cycle device
  • Refrigeration oil, working fluid composition and refrigeration cycle device
  • Refrigeration oil, working fluid composition and refrigeration cycle device

Examples

Experimental program
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Effect test

Embodiment 1

[0045] According to the stoichiometric ratio required to generate the full ester from the esterification reaction, take an appropriate amount of dipentaerythritol, butyric acid, 2-ethylhexanoic acid in the case of a slight excess of acid, and obtain after heating, water separation, reflux, and vacuum distillation. Target base oil in which the molar ratio of butyric acid to 2-ethylhexanoic acid is 1.1:1. The mass proportion of the base oil in the refrigerating machine oil is 97.5%, and the remaining 2.5% are additives, specifically 0.5% antioxidants, selected as 2, 6-di-tert-butyl-4-cresol; 0.02% metal passivation 1% of antiwear agent, selected as tricresyl phosphate; 0.98% of acid scavenger, selected as 2-ethylhexyl glycidyl ether, the above percentage is the mass ratio .

Embodiment 2

[0047] According to the stoichiometric ratio required for the esterification reaction to generate the full ester, take an appropriate amount of pentaerythritol, isobutyric acid, adipic acid, 3,5,5-trimethylhexanoic acid in the case of a slight excess of acid. After water, reflux and vacuum distillation, the target base oil is obtained, wherein the molar ratio of isobutyric acid, adipic acid and 3,5,5-trimethylhexanoic acid is 20:15:65. The total proportion of base oil in the refrigerating machine oil is 97.5%, and the remaining 2.5% are additives, specifically 0.5% antioxidants, selected as 2, 6-di-tert-butyl-4-cresol; 0.02% metal passivation The acid scavenger was selected as benzotriazole derivative (T551); the 1% anti-wear agent was selected as tricresyl phosphate; the 0.98% acid scavenger was selected as pentaerythritol tetraglycidyl ether. The above percentages are mass ratios.

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Abstract

The present application relates to the technical field of refrigerating machine oil products and refrigeration devices, and in particular, to a refrigerating machine oil, a working fluid composition, and a refrigeration cycle device. Refrigerator oil uses polyol ester synthesized from polyol and fatty acid ester as base oil. The viscosity of refrigeration oil is 60-100cst at 40°C, and the density is greater than 1g / cm at 20°C. 3 , Refrigerator oil and R32 refrigerant are separated into two layers within the working temperature range of the refrigeration system to form a lean oil layer and an oil rich layer. The working fluid composition formed by mixing refrigerating machine oil and R32 refrigerant can meet the long-term durability, ultra-low temperature start-up and oil return test requirements of the compressor, and can be widely used in refrigeration cycle devices using R32 as refrigerant. Under the condition that the circulation device is reformed, the oil return and lubrication problems of the refrigeration oil in the R32 refrigeration cycle device that are incompatible with the refrigerant or in the middle are solved, and the choice of refrigeration oil for the R32 refrigeration cycle device is broadened.

Description

technical field [0001] The present application relates to the technical field of refrigerating machine oil products and refrigeration devices, and in particular, to a kind of refrigerating machine oil, and also relates to a working fluid composition containing the refrigerating machine oil and a refrigeration cycle device using the working fluid composition. Background technique [0002] Refrigerator oil is the functional fluid in the compressor and plays an important role in the refrigeration cycle. The fast-flowing refrigerant circulation system inevitably brings the refrigerating machine oil in the compressor into the refrigeration system, and the compatibility of the refrigerating machine oil and the refrigerant directly affects the working performance of the refrigeration system. [0003] In the refrigeration equipment used in the room air-conditioning industry, the refrigeration oil used by the compressor is required to be completely compatible with the refrigerant in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/04F25B1/04C10N40/30C10N30/06C10N30/10
CPCC10M169/045F25B1/04C10M2207/2835C10M2207/026C10M2215/223C10M2223/041C10M2207/042C10M2211/022Y02P20/10
Inventor 郭小青徐嘉史正良林新俊詹翔智廖李平
Owner ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION