Environment-friendly type refrigerant

Abstract

An environmental-friendly refrigerant, used in equipments such as refrigerators, air-conditions, and heat pumps, etc., is directly in place of the HCFC-22 refrigerant technology field, and consists of components A, B, and C. The component A is one of ethyl fluoride or 1, 1-difluoroethane or the mixture of the two according to any proportion. The component B is Difluoromethane. The component C is one of isobutane, normal butane, propane and propylene or mixture of two or more of the chemicals according to any proportion. The invention overcomes the disadvantages of the prior art of alternative refrigerant and the deficient compatibility between HCFC-22 compressors and lube, as well as the high GWP. The invention provides a refrigerant with good environment performance, the thermal parameters of which is similar to that of HCFC-22. The invention can be used directly in the former system of HCFC-22, as well as the HCFC-22 compressor and lube. The unit volume refrigerating capacity is great while the density is small, thus reducing the mass of using and increasing the energy efficiency ratio, as well as saving resources. The refrigerant can be a long-term substitute of HCFC-22.

Description

technical field [0001] The invention relates to a refrigerant, in particular to an environment-friendly refrigerant used in refrigeration, air-conditioning, heat pumps and other equipment to directly replace HCFC-22 with basically unchanged system, zero atmospheric ozone destruction potential and low greenhouse effect. Background technique [0002] HCFC-22 has become the most widely used refrigerant with the best comprehensive performance in the refrigeration and air-conditioning industry at home and abroad due to its excellent physical, chemical and thermodynamic properties as well as good use safety and economy. However, HCFC-22 has a relatively high GWP (Global Warming Potential) value and ODP (Ozone Depletion Potential) value are not friendly to the environment and are required to be phased out within a time limit. [0003] At present, the most widely used substitutes for HCFC-22 are R410A and R407C, but they each have certain defects, that is, the heat transfer of R407C...

AI Technical Summary

Problems solved by technology

[0005] 1). Invention patents with publication numbers CN1055300C and CN1244663C, using a ternary mixture of HFC-32, HFC-125 and HFC-152a as a substitute for HCFC-22, which has similar thermal properties to HCFC-22, but has not been resolved Under long-term operation, the compatibility of the alternative working fluid with the HCFC-22 compressor and lubricating oil

[0006] 2). The invention patent with publication number CN1412266A uses a mixture of HFC-32, HFC-134a and HFC-143a to replace HCFC-22; the invention patent with publication number CN1136065A uses a mixture of HFC-32, HFC-125 and HFC-227ea Replace HCFC-22; CN1189525A uses a mixture of HFC-32, HFC-134a and HFC-227ea to replace HCFC-22, but there is a problem of high GWP value

[0007] 3). The invention patent with publication number CN1173525A uses a mixture of HC-290, HC-600a and TS flame retardant to replace HCFC-22; the invention patent with publication number CN1255502C uses HC-1270, FC-13I1 and HC-170 The mixture replaces HCFC-22. This type of mixture mainly uses hydrocarbons and their compositions, which has hidden dangers of haze effect and may cause new environmental problems.

[0008] 4). The invention patent with publication number CN1189525A also uses a mixture of HFC-32, HFC-134a, HFC-152a and FC-13I1 to replace HCFC-22; the invention patent with publication number CN1255502C uses FC-13I1, HFC-134a and The mixture of CO2 replaces HCFC-22. This type of mixture uses FC-13I1, which has relatively good environmental performance and thermal performance. However, because iodine (I) cannot be synthesized artificially, FC-13I1 is expensive and the cost of use is extremely high. conducive to widespread use

[0009] 5). The invention patent with publication number CN1780892A uses a mixture of HFC-161, HFC-32 and HFC-125 to replace HCFC-22, but this substitute cannot use HCFC-22 compressors and mineral oil, and must use R407C or R410A compressors and ester oils have high replacement costs and are not suitable for direct replacement in HCFC-22 systems

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