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Refrigeration device

A refrigeration device and refrigerant technology, which is applied in refrigerators, refrigeration and liquefaction, base materials, etc., can solve the problems of viscosity drop and affect the reliability of compressors, and achieve improved oil return, good solubility, improved reliability and The effect of system performance

Active Publication Date: 2013-11-13
GUANGDONG MEIZHI COMPRESSOR
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] According to the principle of "like dissolves like" in chemistry, if you want to find an oil that is compatible with R32 refrigerant, you must increase the polarity of the oil, but for refrigerator oil, due to the increase in polarity, the viscosity will often decrease, affecting The reliability of the compressor; therefore, ensuring the polarity of the refrigeration oil and ensuring that the refrigeration oil has a certain viscosity is the main subject of developing a suitable refrigeration oil for R32 refrigerant

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0021] see Figure 1-Figure 2 , the refrigerating device includes a refrigerating cycle at least composed of a compressor 1, a condenser 22, an expansion mechanism 23 and an evaporator 24, the refrigerating cycle is filled with R32 refrigerant and refrigerating machine oil, and the refrigerating machine oil is composed of the first multi-component Alcohol ester and the second polyol ester are mixed, the first polyol ester satisfies general formula 1, the second polyol ester satisfies general formula 2,

[0022] General formula one;

[0023] General formula two;

[0024] Wherein, R1, R2, R3 and R4 are respectively alkyl groups with 1 to 9 carbon atoms, and R1', R2', R3' and R4' are respectively alkyl groups with 8 to 16 carbon atoms.

[0025] The two-layer separation temperature of the first polyol ester and the R32 refrigerant is below -10°C, and the two-layer separation temperature of the second polyol ester and the R32 refrigerant is above -10°C.

[0026] The first po...

Embodiment 2

[0033] When the refrigerating machine oil is formed by mixing the third base oil and the fourth base oil, the third base oil adopts the first polyol ester, and R1~R4 in the third base oil are alkanes containing 6 and 9 carbon atoms. base, wherein the molar volume ratio of C6 and C9 is more than 50%; the fourth base oil adopts the second polyol ester, and the R1'~R4' in the fourth base oil are those containing 8 and 9 carbon atoms Alkyl, wherein the molar volume ratio of C8 and C9 is below 50%. The characteristics of the refrigerating machine oil obtained after mixing are shown in Table 1. The viscosity of the refrigerating machine oil at 40°C is 68mm 2 / s, the viscosity in Example 1 is significantly improved, but the two-layer separation temperature is worse than that in Example 1, and the two-layer separation temperature reaches 10°C.

[0034] See Embodiment 1 for the rest of the undescribed parts, and will not repeat.

[0035] Table 2

[0036]

[0037] Table 2 shows th...

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Abstract

The invention relates to a refrigeration device comprising a refrigeration circulation at least composed of a compressor, a condenser, an expansion mechanism, and an evaporator. R32 refrigerant and refrigerant oil are filled in the refrigeration circulation. The refrigerant oil is obtained by mixing first polyol ester satisfying a formula One and second polyol ester satisfying a formula Two. A two-layer separation temperature of the first polyol ester and the R32 refrigerant is below -10 DEG C. A two-layer separation temperature of the second polyol ester and the R32 refrigerant is above -10 DEG C. The first polyol ester is obtained by compounding pentaerythritol and fatty acid, wherein the fatty acid satisfies CnH2n+1COOH, n being no greater than 9. The second polyol ester is obtained by compounding pentaerythritol and fatty acid, wherein the fatty acid satisfies CnH2n+1COOH, n being no smaller than 8. The refrigerant oil and R32 refrigerant adopted by the invention have good dissolving capacity, such that system oil return performance is improved, compressor reliability is improved, and system performance is improved.

Description

technical field [0001] The invention relates to a refrigeration device. Background technique [0002] In recent years, due to the destructive effect of the traditional freon R22 refrigerant on the ozone layer, the use of R22 refrigerant has been limited by the Montreal International Treaty and will be discontinued in the future. In addition, with global warming, considering the global warming coefficient GWP, high-GWP R410A refrigerants will eventually be replaced by low-GWP refrigerants. At present, the industry is looking for an environmentally friendly refrigerant for development. As a natural refrigerant, R290 has attracted the attention of the industry, but due to its flammability, explosion and low charge requirements, its use is limited at this stage. R32 refrigerant, as one of the chlorine-free fluorinated hydrocarbons and one of the candidate refrigerants with low global warming coefficient GWP, has attracted the attention of the industry due to its environmental ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M105/38F25B1/00C10N20/02
Inventor 龙春仙
Owner GUANGDONG MEIZHI COMPRESSOR
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