Method and apparatus for measuring solubility of refrigerant in refrigerant oil

Abstract

The invention provides a method and an apparatus for measuring solubility of a refrigerant in refrigerant oil. The apparatus comprises equilibrium still, a refrigerant injection system, a circulatory system, a temperature-control system, a densitometer, and a temperature and pressure measuring system. Compared with the prior art, the method and the apparatus of the invention are easily realized, more important, by measuring the liquid density in the equilibrium still and other general parameters as well as employing relative algorithm which is different with the algorithm in the prior art, solubility of the refrigerant oil is accurately calculated; in addition, the circulatory system is employed for introducing the liquid in the equilibrium still from an outlet of the equilibrium still to an inlet of the equilibrium still, mixing and dissolving of the refrigerant and the refrigerant oil are accelerated, and the gas-liquid phase balance can be reached in a faster mode. The method and the apparatus of the invention are more suitable for the wider scope and pressure scope, which basically and completely satisfy the requirement of practical usage.

Description

technical field [0001] The invention belongs to the technical field of measuring devices, and relates to a method and a device for measuring the solubility of refrigerant in refrigerating machine oil. Background technique [0002] Out of the pursuit of global energy saving and environmental friendliness, after the Montreal Conference and the signing of the Kyoto Protocol, people accelerated the pace of eliminating the original HCFCs refrigerants and developing new environmentally friendly refrigerants. [0003] In the development of new refrigerants, in addition to the research on the thermodynamic properties of the new refrigerant itself, it includes the research on parameters such as saturated vapor pressure, saturated gas thermal conductivity, and saturated liquid viscosity, as well as the effect of the new refrigerant on the entire air-conditioning or heat pump system. In addition to improvement, it is also necessary to confirm the mixing performance of the refrigerant a...

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Problems solved by technology

[0004] However, because the refrigerant exists in a gaseous state at normal temperature and pressure, and during the operation of the air conditioner and compressor, there are different temperature and pressure conditions at different parts, so the solubility of the mixture of refrigerant and refrigerating machine oil It is not possible to simply investigate through the addition ratio, and it is necessary to investigate the solubility of different pressures, temperatures and refrigerant injections. Therefore, a method that can quickly obtain the solubility data of various refrigerants in refrigerating machine oil at different temperatures is developed. Measurement methods and devices are particularly important

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