Mix refrigerant, preparing method and uses thereof

Abstract

The invention provides a ternary near azeotropic refrigerant, which comprises tertiary mixture consisting of 1, 1, 2, 2-tetra fluoro ethane, 1, 1-difluoroethane and propane. The total of the mass percent concentration of all components of the mixed refrigerant is 100 percent, including 1, 1, 2, 2-tetra fluoro ethane with the condensation of 1 percent to 20 percent, dimethyl ether with the condensation of 1 percent to 50 percent, and propane with the condensation of 30 percent to 90 percent. The invention further provides a method for preparing the mixed refrigerant and a use of the mixed refrigerant. The mixed refrigerant has high efficiency and high evaporating pressure with large refrigerating capacity when the compressor discharge rate is the same; the ODP is zero, and compared with R502 and R404A, the GWP of the refrigerant is significantly reduced.

Description

technical field [0001] The invention belongs to the field of refrigerants. The invention relates to a mixed refrigerant, in particular to an efficient and environment-friendly mixed refrigerant used in a single-stage compression refrigeration system. The present invention also relates to a method for preparing the mixed refrigerant. The present invention also relates to a use of the mixed refrigerant. Background technique [0002] Single-stage compression refrigeration technology is the most widely used technology in the field of civil refrigeration, such as refrigerators in household appliances, air conditioners, and central air conditioners in office buildings. With the development of social production and life, there is an increasing demand for lower refrigeration temperatures (such as -40°C temperature zone), such as active storage of biological materials, quick-freezing and low-temperature preservation of food, etc. Generally speaking, due to the limitation of the co...

AI Technical Summary

Problems solved by technology

The boiling point of R290 is -42.2°C, the boiling point of R134 is -23°C, and the boiling point of R152a is -24°C (the pure data are quoted from "Refrigerant User Manual", edited by Cao Desheng and Shi Lin, Beijing, Metallurgical Industry Press, 2003), the boiling point difference is less than 20°C, which means that in WO9417153, if R290 is selected as the low boiling point working fluid, R134 and R152a cannot be selected as the high boiling point working medium, so the mixture of R134+R152a+R290 described in this patent cannot be formed

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