CN-122012025-A - Mixed refrigerant for replacing R134a as well as preparation method and application thereof

Abstract

The invention relates to the technical field of refrigerants, in particular to a mixed refrigerant for replacing R134a, and a preparation method and application thereof, and the mixed refrigerant comprises a first component, a second component and a third component, wherein the first component is hexafluoropropylene R1216, the mass ratio is 36-65%, the second component is trans-1, 2-difluoroethylene R1132 (E), the mass ratio is 2-8%, and the third component is 2, 3-tetrafluoropropene R1234yf, the mass ratio is 30-62%. The refrigerant mixed by the three components provided by the invention has the advantages that the refrigerating coefficient per unit volume is higher than R134a, the refrigerating performance coefficient is close to that of R134a, the system performance is excellent, the GWP value of the mixed refrigerant is smaller than 1 and is obviously lower than that of R134a, the requirement of the GWP limit value of the automobile air conditioner refrigerant is met, and the obvious and outstanding environment-friendly advantage is realized.

Inventors

• ZHANG YONG
• WANG LUYAO
• XING TAO
• YU RUJIE
• REN JIABAO
• WANG CHAOQIAN
• XU SHUJIE
• ZHANG PENG
• AN YI
• ZHANG WENCONG
• ZHANG YUNPENG

Assignees

• 中汽数据(天津)有限公司
• 中汽数据有限公司

Dates

Publication Date

20260512

Application Date

20260126

Claims (6)

1. 1. A mixed refrigerant replacing R134a, comprising a first component, a second component, and a third component; The first component is hexafluoropropylene R1216, and the mass ratio is 36% -65%; The second component is trans-1, 2-difluoroethylene R1132 (E), and the mass ratio is 2% -8%; The third component is 2, 3-tetrafluoropropene R1234yf, and the mass ratio is 30% -62%.
2. 2. The mixed refrigerant replacing R134a according to claim 1, wherein the mass ratio of the first component is 36 to 45%; The mass ratio of the second component is 2%; the mass ratio of the third component is 53-62%.
3. 3. The mixed refrigerant replacing R134a according to claim 1, wherein the mass ratio of the first component is 40 to 65%; the mass ratio of the second component is 5%; the mass ratio of the third component is 30% -55%.
4. 4. The mixed refrigerant replacing R134a according to claim 1, wherein the GWP value of the mixed refrigerant is less than 1.
5. 5. A method for preparing a mixed refrigerant replacing R134a according to any one of claims 1 to 4, wherein the components are physically mixed according to the corresponding mass ratio in a normal pressure liquid phase state at-60 ℃, and the mixed refrigerant replacing R134a is prepared after uniform stirring.
6. 6. Use of a mixed refrigerant according to any one of claims 1 to 4 for replacing R134a refrigerant in an automotive air conditioning system.

Description

Mixed refrigerant for replacing R134a as well as preparation method and application thereof Technical Field The invention belongs to the technical field of refrigerants, and particularly relates to a mixed refrigerant for replacing R134a, and a preparation method and application thereof. Background In recent years, as global climate warms, ecological environments worsen, and international society has established a series of legal regulations to limit the use of high Global Warming Potential (GWP) refrigerants, new generation refrigerants are required to have zero Ozone Depletion Potential (ODP) and as low GWP values as possible. In the automotive field, the most widely used automotive air conditioning refrigerant in China is 1, 2-tetrafluoroethane (R134 a), which has a GWP of 1530 and has an extremely strong greenhouse effect. In 2021, 9 and 15, the "keplus amendment" is formally effective in China, china will fulfill the new requirements of Hydrofluorocarbon (HFCs) management under the framework of the protocol, and HFCs are incorporated into the "Chinese controlled ozone depletion layer bill of substances", which is taken as the legal basis for gradually implementing HFCs reduction in China, and the traditional automobile air conditioner refrigerant R134a awesomely is listed and replaced with a certain one. The department of China's ecological environment department, the national development and reform Committee, and the like, jointly issues national program (2025-2030) of Montreal protocol on ozone depletion substances (China's fulfillment), and the M1 passenger car air conditioning system of the new application publication is prohibited from using a refrigerant with GWP of more than 150 from day 1 of 7 of 2029. In the face of the national regulatory policy, the R134a refrigerant is eliminated and used because of having a higher GWP value, and the search for a substitute refrigerant with better environmental protection performance than R134a and excellent cycle performance is urgent. Because of the contradiction and limitation among the environmental protection property, the blasting property and the thermodynamic property of the refrigerant, the single refrigerant often cannot meet the requirement of the current automobile air conditioner, and the mixed refrigerant can balance the thermal property of the refrigerant, so that great attention is paid. But no perfect automobile air conditioner refrigerant alternative is found at present. How to overcome the defects of the prior art and find an automobile air conditioner refrigerant with a low GWP value and good thermodynamic performance becomes a problem to be solved urgently. Disclosure of Invention The invention aims to solve the defects and provide the mixed refrigerant which has the GWP value of not more than 1, has obvious environmental protection advantage, has higher unit volume refrigerant than the traditional R134a refrigerant, has the coefficient of performance close to that of the R134a refrigerant, and has wide application prospect in the field of automobile air conditioning and can replace R134a, and the preparation method and the application thereof. In order to solve the technical problems, the invention adopts the following technical scheme that the mixed refrigerant for replacing R134a comprises a first component, a second component and a third component; The first component is hexafluoropropylene R1216, and the mass ratio is 36% -65%; The second component is trans-1, 2-difluoroethylene R1132 (E), and the mass ratio is 2% -8%; The third component is 2, 3-tetrafluoropropene R1234yf, and the mass ratio is 30% -62%. Further, the mass ratio of the first component is 36-45%; The mass ratio of the second component is 2%; the mass ratio of the third component is 53-62%. Further, the mass ratio of the first component is 40-65%; the mass ratio of the second component is 5%; the mass ratio of the third component is 30% -55%. Further, the GWP value of the mixed refrigerant is less than 1. The preparation method of the mixed refrigerant for replacing R134a is characterized in that the mixed refrigerant for replacing R134a is prepared by mixing the components according to the corresponding mass percentAnd (3) physically mixing and stirring the mixture at 60 ℃ under normal pressure (0.1 MPa) in a liquid phase state to prepare the mixed refrigerant for replacing R134 a. Use of a mixed refrigerant replacing R134a for replacing R134a refrigerant in an automotive air conditioning system. Compared with the prior art, the invention has the following beneficial effects: 1. The refrigerant mixed by the three components provided by the invention has the advantages that the refrigerating capacity per unit volume is higher than R134a, the coefficient of performance is close to that of R134a, the system performance is excellent, the GWP value of the mixed refrigerant is smaller than 1 and is obviously lower than that of R134a, the refrigerant meets the requirements