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Refrigerating machine oil, working fluid composition and refrigeration cycle device

A refrigerating machine oil and refrigerant technology, which is applied in lubricating compositions, refrigerators, petroleum industry, etc., can solve the problems of refrigerating machine oil, such as reduced lubrication, bad, poor oil return of refrigerating machine oil, etc., and achieve the effect of widening the selection

Active Publication Date: 2021-02-26
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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  • Refrigerating machine oil, working fluid composition and refrigeration cycle device
  • Refrigerating machine oil, working fluid composition and refrigeration cycle device
  • Refrigerating machine oil, working fluid composition and refrigeration cycle device

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Embodiment 1

[0045] According to the stoichiometric ratio required by the esterification reaction to form a full ester, take an appropriate amount of dipentaerythritol, butyric acid, and 2-ethylhexanoic acid under the condition of a slight excess of acid, and obtain it after heating, water separation, reflux, and vacuum distillation Target base oil with a 1.1:1 molar ratio of butyric acid to 2-ethylhexanoic acid. The mass proportion of base oil in refrigeration oil is 97.5%, and the remaining 2.5% are additives, specifically 0.5% antioxidant, selected as 2,6-di-tert-butyl-4-cresol; 0.02% metal passivation 1% anti-wear agent, choose tricresyl phosphate; 0.98% acid scavenger, choose 2-ethylhexyl glycidyl ether, the above percentages are mass ratios .

Embodiment 2

[0047] According to the stoichiometric ratio required by the esterification reaction to generate the full ester, take an appropriate amount of pentaerythritol, isobutyric acid, adipic acid, and 3,5,5-trimethylhexanoic acid under the condition of a slight excess of acid, and heat, separate The target base oil was obtained after water, reflux, and vacuum distillation, wherein the molar ratio of isobutyric acid, adipic acid, and 3,5,5-trimethylhexanoic acid was 20:15:65. The total amount of base oil in refrigeration oil is 97.5%, and the remaining 2.5% are additives, specifically 0.5% antioxidant, which is 2, 6-di-tert-butyl-4-cresol; 0.02% metal passivation 1% anti-wear agent, choose tricresyl phosphate; 0.98% acid scavenger, choose pentaerythritol tetraglycidyl ether. The above percentages are mass ratios.

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Abstract

The invention relates to the technical field of refrigerating machine oil products and refrigeration devices, in particular to refrigerating machine oil, a working fluid composition and a refrigeration cycle device. The refrigerating machine oil takes polyol ester synthesized by esterification of polyol and fatty acid as base oil, the viscosity of the refrigerating machine oil at 40 DEG C is 60-100cst, the density of the refrigerating machine oil at 20 DEG C is greater than 1g / cm < 3 >, and the refrigerating machine oil and an R32 refrigerant are subjected to two-layer separation in a workingtemperature range of a refrigeration system to form a lean oil layer and an oil-rich layer. The working fluid composition formed by mixing the refrigerating machine oil and the R32 refrigerant can meet the test requirements of long-term durability, ultralow-temperature startability and oil return performance of a compressor, can be widely applied to the refrigeration cycle device taking R32 as therefrigerant, under the condition that the compressor and the refrigeration cycle device are not transformed, the problems of oil return and lubrication of refrigerating machine oil which is difficultto dissolve in a refrigerant or is dissolved in an intermediate phase in the R32 refrigeration cycle device are solved, and the selection range of the refrigerating machine oil of the R32 refrigeration cycle device is widened.

Description

technical field [0001] The present application relates to the technical field of refrigerating machine oil products and refrigerating devices, and in particular, relates to a refrigerating machine oil, 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 refrigerating system, and the compatibility of refrigerating machine oil and refrigerant directly affects the working performance of the refrigerating system. [0003] In the refrigeration equipment used in the room air-conditioning industry, the refrigeration oil used in the compressor is required to be completely compatible with the refrigerant in a certain area above 0°C, t...

Claims

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Application Information

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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
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