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Method and device for measuring solubility of refrigerant and refrigerating machine oil

A technique for refrigerating machine oil and measuring methods, which is applied in the direction of analyzing materials and instruments, and can solve problems such as reducing heat transfer efficiency, affecting the normal operation of compressors, and changing the viscosity of lubricating oil.

Inactive Publication Date: 2017-02-08
WUHAN UN LUBRICANT TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the dissolved refrigerant will change the viscosity of the lubricating oil, thus affecting the normal operation of the compressor
As the refrigerant enters the evaporator, the lubricating oil will form a liquid film on the inner surface of the evaporator, reducing the heat transfer efficiency

Method used

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  • Method and device for measuring solubility of refrigerant and refrigerating machine oil

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Experimental program
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Embodiment Construction

[0019] The determination of gas solubility under high pressure in this experiment mainly includes the following steps.

[0020] Experiment preparation: ①Device cleaning: Before testing, the inner wall of the autoclave, pipes and valves should be cleaned and dried with solvent to remove the remaining processing oil / liquid and water vapor in the autoclave;]②The volume measurement of the balance autoclave system: despite the high The kettle is marked with the nominal volume when it leaves the factory, but during the test, the volume occupied by the system connecting pipes and pressure gauges is unknown and needs to be actually measured. The volume of the balance kettle system is measured by the drainage method. The density of water is calculated by the Refprop 8.0 program according to the temperature and atmospheric pressure in the laboratory, and the volume change of each container caused by the change of temperature and pressure is ignored in the test; ③ System leak detection: ...

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Abstract

The invention relates to a method and a device for measuring solubility of refrigerant and refrigerating machine oil. According to the method and the device, the problems of pressure resistance and seal are easily solved in the measuring process, and the equipment is easy to manufacture. When the gas phase composition is not analyzed in the gas-liquid equilibrium calculation process, the gas phase composition can be calculated by P-T-x, so that the problems such as difficulty and measurement inaccuracy brought by lots of analysis work of solubility data which is directly measured by liquid-phase sampling analysis and sampling deviated from the equilibrium are solved.

Description

technical field [0001] The invention belongs to the field of refrigeration, in particular to the measurement of solubility of refrigerant and refrigerating machine oil. Background technique [0002] Due to the high flammability of R290, when used in air conditioning systems, the standard IEC 60335-2-40 (2013) and GB4706.32 (2012) stipulates the use of flammable hydrocarbon refrigerants in rooms of different sizes The upper limit of the refrigerant charge for the air conditioning system is subject to the same restriction. According to standard requirements, the air conditioner using R290 (propane) refrigerant is used in rooms of different sizes, and the maximum amount of refrigerant sealed in the air conditioner needs to be greatly reduced compared with R22. [0003] In order to meet the restrictions on the amount of sealing, necessary measures must be taken, such as reducing the size of the two devices, reducing the refrigerant content in the compressor, etc. In the compre...

Claims

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Application Information

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IPC IPC(8): G01N7/04
CPCG01N7/04
Inventor 赵建平
Owner WUHAN UN LUBRICANT TECH
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