Mixed refrigerant suitable for high temperature environment refrigerating air-conditioning apparatus

Abstract

The invention relates to a mixed refrigerant applicable to high-temperature refrigeration air-conditioning device, which is characterized by using a ternary non-azeotropic mixed refrigerant and comprising a high-temperature refrigerant R142b, and moderate-temperature refrigerants R134a and R152a; and the mass percentage is as follows: 10 percent to 42 percent of R142b, 0 percent to 68 percent of R134a, 10 percent to 68 percent of R152a and impurity with the concentration of less than or equal to 0.20 percent. The mixed refrigerant does not need to change the structure and the composition of the original system when used, has the advantages of convenient modulation, easy operation and good temperature applicability, enables the refrigeration air-conditioning device to obtain good working property and economic property under the high temperature, works stably and reliably at a wider working temperature range, and is suitable for high-temperature heat pump systems.

Description

technical field [0001] The invention relates to the technical field of refrigeration and air conditioning, in particular to refrigeration working medium used in vapor compression refrigeration devices such as refrigeration, air conditioners, and high-temperature heat pumps that operate in high-temperature environments and have a wide operating temperature range of 20°C to 90°C. Background technique [0002] At present, refrigeration and air-conditioning devices or equipment used in high-temperature environments usually use a single medium-temperature or high-temperature refrigerant in their refrigeration systems. Limited by the thermophysical properties of refrigerants, medium-temperature refrigerants, such as R22 and R134a, when the ambient temperature is higher than 75°C, the exhaust pressure and exhaust temperature are too high, the condensation is incomplete or the subcooling degree is too small or cannot be condensed , the working efficiency of the refrigeration system ...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problems of poor thermal performance and economic performance, poor working stability and reliability in a wide temperature range from 20°C to 90°C in a refrigeration and air-conditioning system with a single medium-temperature or high-temperature refrigerant scheme, and provides A mixed refrigerant suitable for refrigerating and air-conditioning devices in high-temperature environments, suitable for refrigerating and air-conditioning devices or equipment operating in high-temperature environments and having a wide operating temperature range, and enabling them to obtain good working performance and economic performance, and No need to change the structure and working process of the original refrigeration system