Environmentally friendly near-azeotropic mixed refrigerant

Abstract

Disclosed is an environmentally friendly near-azeotropic mixed refrigerant, consisting essentially of HFO-1234 yf, HFE-143a and a third component, with the mass percentage of each component being: 70%-98% of HFO-1234yf, 1%-15% of HFE-143a and 1%-15% of the third component. The refrigerant of the present invention is environmentally friendly, excellent in thermodynamic properties, can directly realize drop-in substitution in an original system using HFC-134 a without changing any parts, and can be used as a long term alternative to HFC-134a.

1 . An environmentally friendly near-azeotropic mixed refrigerant essentially comprises HFO-1234yf , HFE-143a and a third component, wherein the third component is selected from one or two or more of HFC-161, HFC-134a, HFC-32, HFE-170, HC-290, C270, and their mass percentages of all components are as follows:
 HFO-1234yf: 70%-98%;   HFE-143a: 1%-15%;   The third component : 1%-15%.   
     
     
         2 . The environmentally friendly near-azeotropic mixed refrigerant according to  claim 1 , wherein the mass percentages of various components are as follows:
 HFO-1234yf: 75%-94%;   HFE-143a: 5%-15%;   The third component: 1% -10%.   
     
     
         3 . The environmentally friendly near-azeotropic mixed refrigerant according to  claim 1 , wherein the mass percentages of various components are as follows:
 HFO-1234yf: 85%-94%;   HFE-143a: 5%-10%;   The third component: 1% -5%.   
     
     
         4 . The environmentally friendly near-azeotropic mixed refrigerant according to  claim 1 , wherein the temperature glide of the refrigerant is less than 1° C. 
     
     
         5 . The environmentally friendly near-azeotropic mixed refrigerant according to  claim 1 , wherein the GWP value of the refrigerant is less than 150. 
     
     
         6 . The environmentally friendly near-azeotropic mixed refrigerant according to  claim 1 , wherein the refrigerant is used as an alternative of HFC-134a. 
     
     
         7 . The environmentally friendly near-azeotropic mixed refrigerant according to  claim 5 , wherein the refrigerant is used as an alternative of HFC-134a in the automotive air conditioning. 
     
     
         8 . The environmentally friendly near-azeotropic mixed refrigerant according to  claim 6 , wherein the automotive air conditioning system need not change any part and the mixed refrigerant can be directly filled as an alternative of HFC-134a.