Refrigerator oil composition

A technique for refrigerating machine oils and compositions, applied in lubricating compositions and the petroleum industry, etc., capable of solving the adverse effects of refrigerating machine oils on thermal-chemical stability and low-temperature performance, limited effect of dewaxing dewaxing of mineral oils, capillary and expansion valve blockages To improve thermal/chemical stability and low-temperature performance, achieve good pour point depressing effect, and shorten service life

Inactive Publication Date: 2012-06-06
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the low-temperature performance of refrigerating machine oil includes not only low-temperature fluidity, but also the tendency of low-temperature wax precipitation (ie, flocculation point). If the effect of dewaxing and decondensation of mineral oil is limited, refrigerating machine oil will produce flocs at low temperatures, resulting in capillary and expansion valves. Blockage, which interrupts the refrigerant cycle
[0008] The mineral-type refrigerating machine oil base oils involved in the prior art mainly use

Method used

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  • Refrigerator oil composition
  • Refrigerator oil composition
  • Refrigerator oil composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Additive 1: The amount added is based on the total weight of the base oil

[0036]

[0037] Add additive 1 to base oil 1 and base oil 2 respectively, and compare the implementation effect:

[0038] ANSI / ASHARE 97 refrigerating machine oil seal tube test method was used to investigate its thermal / chemical stability. The sample and refrigerant were 1:1 (mass), and then steel, aluminum, and copper catalysts were added, and sealed at 175°C for 14 days. , Observe the color and appearance of the solution and catalyst to evaluate.

[0039] Thermal / Chemical Stability

Embodiment 2～4

[0042] Additives: the amount added is based on the total weight of the base oil

[0043]

[0044] Implementation Effect:

[0045]

Embodiment 5～8

[0047] Example 5

[0048] Additives: the amount added is based on the total weight of the base oil

[0049]

[0050] Implementation Effect:

[0051] Thermal / Chemical Stability

[0052] Judging from the comparative effects of the above examples and comparative examples, the refrigerating machine oil with a higher refining depth has better thermal-chemical stability and low-temperature performance, and will not be carbonized in the refrigeration cycle, and corrosion and blockage such as acid or sludge will not occur At the same time, the compressor will not stay or produce flocs at low temperatures, and prevent the capillary and expansion valve from being blocked, thereby improving the cooling efficiency of the air conditioner and ensuring long-term stable operation.

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PUM

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Abstract

The invention relates to a refrigerator oil composition. According to the invention, deep hydrorefined cycloalkane-based base oil and/or paraffin-based mineral oil is adopted as a base oil; a sulfur type, a phosphorus type or a sulfur-phosphorous type anti-scuff agent which takes 1.0-2.5% of every gram of the base oil by weight, and a silicon type, a non-silicon type or a composite type anti-foaming agent which takes 5-25mug of every gram of the base oil by weight are added to the base oil. The refrigerator oil composition provided by the invention has a good pour point depression and dewaxing effect, an excellent fluidity, and a low wax precipitation tendency. A pour point of the base oil with a kinematical viscosity of 35-45mm<2>/s under a temperature of 40 DEG C can be lower than -45 DEG C, and a floc point can be reduced to a value below -42 DEG C. Therefore, heat transferring efficiency reduction caused by refrigerator oil retention at low-temperature positions such as a compressor expansion valve or an evaporator can be prevented. The refrigerator oil composition has sulfur and nitrogen content below 10ppm, a %CA value close to 0, arene content below 1%, and excellent heat/chemical stability and corrosion resistance. With the refrigerator oil composition, a high-power air-conditioner compressor with R22 (monochlorodifluoromethane) as a refrigeration agent can stably operate for a long time.

Description

technical field [0001] The invention relates to a refrigerating machine oil composition, in particular to a refrigerating machine oil composition used in an air-conditioning compressor refrigeration system using R22 as a refrigerant. Background technique [0002] Refrigeration oil is a special lubricating oil for refrigeration compressors. It plays the role of lubrication, sealing and heat dissipation during the operation of the compressor. It is an important component in the refrigeration system that determines and affects the function and effect of the refrigeration device. As refrigeration compressors tend to be more efficient and energy-saving, higher requirements are placed on the thermal / chemical stability, low temperature performance, lubricity, and viscosity-temperature performance of refrigeration oil. At present, the commonly used mineral type refrigerating machine oil products are mainly moderately refined by combined processes such as solvent refining, hydrogenat...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10N40/30
Inventor 柯友胜刘燕张霞玲王凯明
Owner PETROCHINA CO LTD
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