Composition containing refrigeration oil and refrigerant and application thereof

Abstract

The invention provides a composition containing refrigeration oil and refrigerant and application thereof. The refrigeration oil and the refrigerant in the composition fulfill the following requirements: on the basis of the gross mass of the composition, when the weight content of the refrigeration oil equals to or is smaller than 50% of the gross mass and the temperature is between minus 50 DEG C to 80 DEG C, the saturated solubility of the refrigeration oil in the refrigerant is 5% to 30% of the total mass; the kinematic viscosity of the refrigeration oil at 40 DEG C is 5 to 60 mm<2> / s. The composition provided by the embodiment of the invention enables the refrigeration oil to be appropriately dissolved with the refrigerant, so that the reliability and the system performance of the compressor can be effectively improved.

Description

technical field [0001] The invention relates to the field of refrigerating equipment, in particular, the invention relates to a composition comprising refrigerating machine oil and refrigerant and application thereof. Background technique [0002] In the refrigeration equipment used in the air-conditioning industry, the refrigerating machine oil used in the compressor is required to be completely compatible with the refrigerant in a certain area above 0°C. The purpose is to ensure that the refrigerating machine oil discharged from the compressor can be dissolved in the refrigerant in the system. The refrigerant returns to the compressor together to ensure the amount of oil in the compressor and the lubrication of parts. However, in recent years, as air conditioners are required to be used at a wider temperature, the low temperature requirement is below -20°C, and the high temperature requirement is above 65°C, and with the development of heat pump water heaters, the temperat...

AI Technical Summary

Problems solved by technology

Using the existing combination of refrigerating machine oil and refrigerant, due to the good compatibility between the two, the refrigerant will dilute the viscosity of the oil more, and the viscosity will drop greatly. In order to ensure the lubrication of the compressor, it is necessary to use high-viscosity oil. If the viscosity of the oil is too high, the residual oil in the refrigeration system will solidify at low temperature, resulting in blockage of the system capillary

In addition, due to the high solubility of refrigerator oil and refrigerant, the refrigerator oil and refrigerant are mixed together and discharged from the compressor, resulting in a decrease in the oil volume inside the compressor. In severe cases, it will affect the lubricity of compressor parts and reduce the life of the compressor. , and the refrigerating machine oil discharged from the compressor adheres to the pipe wall of the refrigeration system, which affects the efficiency of the heat exchanger and reduces the energy efficiency of the refrigeration system

[0003] In the prior art, there are oils that are completely incompatible with the refrigerant, but it will make it difficult for the refrigerating machine oil discharged from the compressor to return to the interior of the compressor, and the oil return performance of the system is poor.

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