CN110699043A - Environment-friendly mixed refrigeration working medium - Google Patents
Environment-friendly mixed refrigeration working medium Download PDFInfo
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Abstract
The invention discloses an environment-friendly mixed refrigerant, which comprises 1-90% of a first component, 1-90% of a second component, 1-90% of a third component and 1-97% of a fourth component by mass percentage; wherein: the first component is trifluoroiodomethane, the second component is at least one of 1,1,1, 2-tetrafluoroethane and pentafluoroethane, the third component is at least one of trans-1, 3,3, 3-tetrafluoropropene, 2,3,3, 3-tetrafluoropropene and difluoromethane, and the fourth component is at least one of 1, 1-difluoroethane, monofluoroethane, propylene, propane, dimethyl ether and isobutane. The GWP value of the mixed refrigerant provided by the invention is greatly reduced relative to R404A, ODP is 0, and the environmental performance is superior to R404A.
Description
Technical Field
The invention relates to a refrigeration working medium, in particular to an environment-friendly mixed refrigeration working medium.
Background
Currently, with global warming and ecological environment deterioration in recent years, international society has set a series of laws and regulations to limit the use of high Global Warming Potential (GWP) refrigerants and has made higher demands on alternatives to high GWP refrigerants, requiring new refrigerants having zero Ozone Depletion Potential (ODP), and as low GWP values as possible. The 'Montreal protocol' Bulgarian amendments made in 2016 made a more rigorous abatement plan for high GWP class refrigerants. China as a contract contracting country will achieve the goal of reducing 80% (calculated as CO2 equivalents) in 2045 years. Therefore, research and development of environment-friendly refrigerants with low GWP values are urgent, pure working media cannot meet the current requirements due to the limitation of contradictions among environment-friendly characteristics, explosion characteristics and thermodynamic performance of the refrigerants, the characteristic that mixed working media can balance the physical properties of the refrigerants is greatly concerned, and a perfect refrigerant substitution scheme is not found at present.
In the field of refrigeration and cold storage, refrigerants which are relatively commonly used at present are R404A and R507A, but both have higher GWP (the GWP is as high as 4000), are used as substitutes of R404A/R507A with lower GWP, such as R454A, R454C, R455A, R457A and R459B, and although the GWP is less than 150, the refrigerants belong to weak combustible (A2L) mixed refrigerants, and can not be filled in a tank in excess of 1.2KG, so that the refrigerants can only be used for small equipment such as refrigerators, freezers and refrigerated containers, but cannot be used in equipment such as common refrigerators, refrigerated transport vehicles and refrigerated containers. R448A and R449A as substitutes of R404A/R507A belong to non-flammable refrigerants (A1 grade), but the GWP is also as high as 1300, and the refrigeration performance is lower than that of R404A.
In view of the above, how to overcome the deficiencies of the prior art, the search for refrigerants with low GWP values and good thermodynamic performance is a problem to be solved.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides an environment-friendly mixed refrigerant which has a low GWP value and a zero ODP value, can obtain good thermodynamic performance parameters and good environmental performance and can be used for replacing R404A and R134a refrigerants.
The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows: an environment-friendly mixed refrigerant comprises, by mass, 1% to 90% of a first component, 1% to 90% of a second component, 1% to 90% of a third component, and 1% to 97% of a fourth component; wherein: the first component is trifluoroiodomethane, the second component is at least one of 1,1,1, 2-tetrafluoroethane and pentafluoroethane, the third component is at least one of trans-1, 3,3, 3-tetrafluoropropene, 2,3,3, 3-tetrafluoropropene and difluoromethane, and the fourth component is at least one of 1, 1-difluoroethane, monofluoroethane, propylene, propane, dimethyl ether and isobutane.
Further, the coating comprises, by mass, 50% -68% of the first component, 9% -11% of the second component, 18% -32% of the third component and 5% -10% of the fourth component.
Further, the coating comprises 50% of the first component, 11% of the second component, 29% of the third component and 10% of the fourth component in percentage by mass.
Further, the coating comprises 52% of the first component, 11% of the second component, 27% of the third component and 10% of the fourth component in percentage by mass.
Further, the coating comprises 67% of the first component, 10% of the second component, 18% of the third component and 5% of the fourth component in percentage by mass.
Further, it includes 1% of the first component, 34.5% of the second component, 62% of the third component, and 2.5% of the fourth component in mass percentage.
Further, the coating comprises 5% of the first component, 35% of the second component, 56% of the third component and 4% of the fourth component in percentage by mass.
Further, the coating comprises 14% of the first component, 10% of the second component, 66% of the third component and 10% of the fourth component in percentage by mass.
Further, the coating comprises 1% of the first component, 40% of the second component, 58% of the third component and 1% of the fourth component in percentage by mass.
Further, the second component comprises 70-90% of 1,1,1, 2-tetrafluoroethane and 10-30% of pentafluoroethane in percentage by mass.
The invention has the advantages and positive effects that: the GWP value of the mixed refrigerant provided by the invention is greatly reduced relative to R404A, ODP is 0, and the environmental performance is superior to R404A;
the mixed refrigerant provided by the invention can reduce the combustibility of the refrigerant, is a weak combustible or non-combustible refrigerant and has better safety performance;
the refrigeration coefficient of the mixed refrigerant provided by the invention is not lower than R404A, and the mixed refrigerant has higher system performance.
Detailed Description
To further understand the contents, features and effects of the present invention, the following examples are listed and described in detail as follows:
an environment-friendly mixed refrigerant comprises, by mass, 1% to 90% of a first component, 1% to 90% of a second component, 1% to 90% of a third component, and 1% to 97% of a fourth component; wherein: the first component is trifluoroiodomethane, the second component is at least one of 1,1,1, 2-tetrafluoroethane and pentafluoroethane, the third component is at least one of trans-1, 3,3, 3-tetrafluoropropene, 2,3,3, 3-tetrafluoropropene and difluoromethane, and the fourth component is at least one of 1, 1-difluoroethane, monofluoroethane, propylene, propane, dimethyl ether and isobutane.
Namely, if the total mass of the mixed refrigerant is X; multiplying X by 1% -90% of the first component by mass; a second component having a mass of X multiplied by 1-90%; a third component having a mass of X multiplied by 1-90%; a fourth component having a mass of X multiplied by 1-97%; these 4 components are physically mixed uniformly in a liquid phase state. The following description is analogized to this.
The percentage of each component refers to the ratio of the mass of the component to the total mass of the mixed refrigerant.
Preferably, the paint comprises 50-68% of the first component, 9-11% of the second component, 18-32% of the third component and 5-10% of the fourth component in percentage by mass.
Preferably, it comprises 50% of the first component, 11% of the second component, 29% of the third component and 10% of the fourth component, in mass percentage.
Preferably, it comprises, in mass percent, 52% of the first component, 11% of the second component, 27% of the third component and 10% of the fourth component.
Preferably, it comprises 67% of the first component, 10% of the second component, 18% of the third component and 5% of the fourth component, in mass percentage.
Preferably, it comprises, in mass percent, 1% of the first component, 34.5% of the second component, 62% of the third component and 2.5% of the fourth component.
Preferably, it comprises, in mass percent, 5% of the first component, 35% of the second component, 56% of the third component and 4% of the fourth component.
Preferably, it comprises, in mass percent, 14% of the first component, 10% of the second component, 66% of the third component and 10% of the fourth component.
Preferably, it comprises, in mass percent, 1% of the first component, 40% of the second component, 58% of the third component and 1% of the fourth component.
Preferably, the second component comprises 70-90% of 1,1,1, 2-tetrafluoroethane and 10-30% of pentafluoroethane in percentage by mass. Namely the second component comprises 1,1,1, 2-tetrafluoroethane and pentafluoroethane, wherein the mass of the 1,1,1, 2-tetrafluoroethane is 70-90% of the total mass of the second component; the mass of the pentafluoroethane is 10-30% of the total mass of the second component.
The preparation method of the environment-friendly mixed refrigerant provided by the invention is that trifluoroiodomethane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), pentafluoroethane (R125), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE), 2,3,3, 3-tetrafluoropropene (R1234yf), difluoromethane (R32), 1, 1-difluoroethane (R152a), monofluoroethane (R161), propylene (R1270), propane (R290), dimethyl ether (RE170) and isobutane (R600a) are divided into four groups, and one component or a plurality of components are taken out from each group; the four groups are physically and uniformly mixed in a liquid phase state according to corresponding proportions. Or mixing the four components uniformly according to corresponding proportion by adopting a conventional physical mixing method.
The trifluoroiodomethane (R13I1), the 1,1,1, 2-tetrafluoroethane (R134a) and the pentafluoroethane (R125) have flame retardance, can be used as flame retardants of other flammable refrigerants, and can obtain an environment-friendly mixed refrigerant with higher safety performance by adjusting the addition amounts of R13I1, R134a and R125, wherein the basic physical parameters of all the components are shown in Table 1.
Table 1: basic physical parameters of each component
In order that those skilled in the art will better understand the application scheme of the present invention, the following will clearly and completely describe the technical scheme in conjunction with the present specific embodiment, which is only a part of the embodiments in the application scheme of the present invention, rather than all embodiments, which may be resorted to by those skilled in the art without the exercise of inventive faculty, and all other embodiments that can be obtained by the skilled person without the exercise of inventive faculty are intended to be encompassed by the scope of the invention, and many more specific examples are set forth below, wherein the proportion of each component is calculated by mass, and the mixed refrigerant is assumed to be 100 parts by mass, the proportion of each component in each embodiment described below represents the mass fraction of each component corresponding to 100 parts of the total mass of the mixed refrigerant, which is equivalent to the mass percentage of each component in the total mass of the mixed refrigerant.
For example, four components, namely a component A, a component B, a component C and a component D, are mixed according to the mass percentage of a: B: C: D, wherein a + B + C + D is 100, and the mixed refrigerant is represented as 100 parts by mass, so that the mass of the component A is a part, the mass of the component B is B part, the mass of the component C is C part and the mass of the component D is D part; the method is equivalent to the following steps: the mass percentage of the component A to the total mass of the mixed refrigerant is a%, the mass percentage of the component B to the total mass of the mixed refrigerant is B%, the mass percentage of the component C to the total mass of the mixed refrigerant is C%, and the mass percentage of the component D to the total mass of the mixed refrigerant is D%. And so on.
Example 1:
the environment-friendly mixed refrigeration working medium is obtained by physically and uniformly mixing four components, namely trifluoroiodomethane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and 1, 1-difluoroethane (R152a) according to the mass percentage of 68:9:18:5 in a liquid phase state.
Namely, if the mass of the mixed refrigerant after mixing is X; then X multiplied by 68% by mass of trifluoroiodomethane (R13I 1); 1,1,1, 2-tetrafluoroethane (R134a) at a mass X times 9%; trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) with mass X multiplied by 18%; 1, 1-difluoroethane (R152a) at 5% by mass X; these 4 components are physically mixed uniformly in a liquid phase state. The following description is analogized to this.
Example 2:
the environment-friendly mixed refrigeration working medium is obtained by physically and uniformly mixing four components, namely trifluoroiodomethane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and monofluoroethane (R161), in a liquid phase state according to the mass percentage of 50:11:29: 10.
Example 3:
three fluorine iodine methane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and propylene (R1270) are physically and uniformly mixed in a liquid phase state according to the mass percentage of 52:11:27:10 to obtain the environment-friendly mixed refrigerant.
Example 4:
the environment-friendly mixed refrigeration working medium is obtained by physically and uniformly mixing four components, namely trifluoroiodomethane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and propane (R290), in a liquid phase state according to the mass percentage of 50:11:29: 10.
Example 5:
the environment-friendly mixed refrigeration working medium is obtained by physically and uniformly mixing four components of trifluoroiodomethane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and dimethyl ether (RE170) according to the mass percentage of 68:9:18:5 in a liquid phase state.
Example 6:
the environment-friendly mixed refrigeration working medium is obtained by physically and uniformly mixing four components, namely trifluoroiodomethane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and isobutane (R600a), in a liquid phase state according to the mass percentage of 14:8:68: 10.
Example 7:
three-fluorine iodomethane (R13I1), pentafluoroethane (R125), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and 1, 1-difluoroethane (R152a) are physically and uniformly mixed in a liquid phase state according to the mass percent of 51:11:32:6, so that the environment-friendly mixed refrigerant is obtained.
Example 8:
three-fluorine iodomethane (R13I1), pentafluoroethane (R125), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and monofluoroethane (R161) are physically and uniformly mixed in a liquid phase state according to the mass percent of 50:11:29:10 to obtain the environment-friendly mixed refrigerant.
Example 9:
three-fluorine iodomethane (R13I1), pentafluoroethane (R125), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and propylene (R1270) are physically and uniformly mixed in a liquid phase state according to the mass percent of 52:11:27:10 to obtain the environment-friendly mixed refrigerant.
Example 10:
three-fluorine iodomethane (R13I1), pentafluoroethane (R125), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and propane (R290) are physically and uniformly mixed in a liquid phase state according to the mass percent of 50:11:29:10 to obtain the environment-friendly mixed refrigerant.
Example 11:
three-fluorine iodomethane (R13I1), pentafluoroethane (R125), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and dimethyl ether (RE170) are physically and uniformly mixed in a liquid phase state according to the mass percentage of 68:9:18:5 to obtain the environment-friendly mixed refrigerant.
Example 12:
three-fluorine iodomethane (R13I1), pentafluoroethane (R125), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and isobutane (R600a) are physically and uniformly mixed in a liquid phase state according to the mass percentage of 14:8:68:10 to obtain the environment-friendly mixed refrigerant.
Example 13:
three-fluorine iodomethane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), pentafluoroethane (R125), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and 1, 1-difluoroethane (R152a) are physically and uniformly mixed in a liquid phase state according to the mass percentage of 67:7:3:18:5 to obtain the environment-friendly mixed refrigerant.
Example 14:
three fluorine iodine methane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), pentafluoroethane (R125), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and monofluoroethane (R161) are physically and uniformly mixed in a liquid phase state according to the mass percentage of 47:9:4:30:10 to obtain the environment-friendly mixed refrigerant.
Example 15:
three-fluorine iodomethane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), pentafluoroethane (R125), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and propylene (R1270) are physically and uniformly mixed in a liquid phase state according to the mass percentage of 50:9:1:30:10 to obtain the environment-friendly mixed refrigerant.
Example 16:
three-fluorine iodomethane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), pentafluoroethane (R125), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and propane (R290) are physically and uniformly mixed in a liquid phase state according to the mass percentage of 50:9:1:30:10 to obtain the environment-friendly mixed refrigeration working medium.
Example 17:
three-fluorine iodomethane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), pentafluoroethane (R125), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and dimethyl ether (RE170) are physically and uniformly mixed in a liquid phase state according to the mass percentage of 66:9:2:18:5 to obtain the environment-friendly mixed refrigeration working medium.
Example 18:
three-fluorine iodomethane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), pentafluoroethane (R125), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and isobutane (R600a) are physically and uniformly mixed in a liquid phase state according to the mass percentage of 14:8:2:66:10 to obtain the environment-friendly mixed refrigerant.
Example 19:
the environment-friendly mixed refrigerant is obtained by physically and uniformly mixing four components, namely trifluoroiodomethane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), 2,3,3, 3-tetrafluoropropene (R1234yf) and 1, 1-difluoroethane (R152a), in a liquid phase state according to the mass percentage of 68:9:18: 5.
Example 20:
three-fluorine iodomethane (R13I1), pentafluoroethane (R125), 2,3,3, 3-tetrafluoropropene (R1234yf) and 1, 1-difluoroethane (R152a) are physically and uniformly mixed in a liquid phase state according to the mass percentage of 51:11:32:6, and the environment-friendly mixed refrigerant is obtained.
Example 21:
three-fluorine iodomethane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), pentafluoroethane (R125), 2,3,3, 3-tetrafluoropropene (R1234yf) and 1, 1-difluoroethane (R152a) are physically and uniformly mixed in a liquid phase state according to the mass percentage of 67:7:3:18:5 to obtain the environment-friendly mixed refrigerant.
Example 22:
the environment-friendly mixed refrigeration working medium is obtained by physically and uniformly mixing four components, namely trifluoroiodomethane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), difluoromethane (R32) and 1, 1-difluoroethane (R152a), in a liquid phase state according to the mass percentage of 68:9:18: 5.
Example 23:
the environment-friendly mixed refrigerant is obtained by physically and uniformly mixing four components of trifluoroiodomethane (R13I1), pentafluoroethane (R125), difluoromethane (R32) and 1, 1-difluoroethane (R152a) according to the mass percentage of 51:11:32:6 in a liquid phase state.
Example 24:
the environment-friendly mixed refrigerant is obtained by physically and uniformly mixing four components of trifluoroiodomethane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), pentafluoroethane (R125), difluoromethane (R32) and 1, 1-difluoroethane (R152a) according to the mass percentage of 67:7:3:18:5 in a liquid phase state.
Example 25:
the environment-friendly mixed refrigeration working medium is obtained by physically and uniformly mixing four components, namely trifluoroiodomethane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and 1, 1-difluoroethane (R152a) according to the mass percentage of 90:1:1:8 in a liquid phase state.
Example 26:
three fluorine iodine methane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and 1, 1-difluoroethane (R152a) are physically and uniformly mixed in a liquid phase state according to the mass percentage of 1:1:90:8 to obtain the environment-friendly mixed refrigerant.
Example 27:
the environment-friendly mixed refrigeration working medium is obtained by physically and uniformly mixing four components, namely trifluoroiodomethane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and 1, 1-difluoroethane (R152a) according to the mass percentage of 1:90:1:8 in a liquid phase state.
Example 28:
three fluorine iodine methane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and 1, 1-difluoroethane (R152a) are physically and uniformly mixed in a liquid phase state according to the mass percentage of 1:1:1:97 to obtain the environment-friendly mixed refrigerant.
Example 29:
the environment-friendly mixed refrigeration working medium is obtained by physically and uniformly mixing four components, namely trifluoroiodomethane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and 1, 1-difluoroethane (R152a) according to the mass percentage of 1:40:58:1 in a liquid phase state.
Example 30:
the environment-friendly mixed refrigeration working medium is prepared by physically and uniformly mixing four components, namely trifluoroiodomethane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and 1, 1-difluoroethane (R152a) according to the mass percentage of 5:35:56:4 in a liquid phase state.
Example 31:
three fluorine iodine methane (R13I1), 1,1,1, 2-tetrafluoroethane (R134a), trans-1, 3,3, 3-tetrafluoropropene (R1234zeE) and 1, 1-difluoroethane (R152a) are physically and uniformly mixed in a liquid phase state according to the mass percentage of 1:34.5:62:2.5 to obtain the environment-friendly mixed refrigerant.
The above examples are reported in Table 2 together with the basic parameters of the refrigerant R404A, such as environmental performance and temperature glide (normal atmospheric pressure 101.325 kPa).
Table 2: basic physical parameters of mixed refrigerant and R404A
The thermodynamic parameters (discharge pressure and temperature) and relative system performance (relative volumetric cooling capacity and relative efficiency COP for each example versus R404A) of the above examples and R404A are recorded in table 3.
Table 3: performance comparison results of mixed refrigerant and R404A
In table 3 above, a1 is the experimentally measured or predicted value; the safety of the mixed refrigerant meets A1 level.
As can be seen from Table 2, the mixed refrigerant provided by the invention has a GWP which is much lower than that of R404A, and has better environmental performance, wherein the GWP of examples 1-6, 19, 25, 26 and 28 is less than 150, which meets the requirements of the current international laws and regulations, the temperature glide of examples 1, 5, 19 and 26-29 is less than 1 ℃, and the adverse effect caused by the temperature glide of the refrigerant during the operation of the system can be reduced.
The results of comparing the above examples with the thermodynamic parameters (discharge pressure and temperature) and the relative system performance (relative volumetric cooling capacity and relative efficiency COP of each example to R404A) of R404A under the refrigeration conditions of-23 ℃ evaporation temperature, 43 ℃ condensation temperature, 12 ℃ superheat degree, 5 ℃ supercooling degree and 0.8 compressor overall efficiency are shown in table 3.
It can be known from table 3 that the performance of the mixed refrigerant provided by the invention under the refrigeration condition is better than that of R404A, COP in different embodiments is improved by 5% to 15%, except for embodiment 23, the refrigeration capacity per unit volume of other embodiments is reduced relative to that of R404A refrigerant, but the refrigeration capacity per unit volume can basically reach about 60% of R404A, and the exhaust temperature is basically equivalent to that of R404A. Except for embodiment 23, the discharge pressure is lower than that of R404A, and the discharge pressure can be directly used for replacing R404A refrigerant.
The above-mentioned embodiments are only for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to carry out the same, and the present invention shall not be limited to the embodiments, i.e. the equivalent changes or modifications made within the spirit of the present invention shall fall within the scope of the present invention.
Claims (10)
1. An environment-friendly mixed refrigerant is characterized by comprising 1-90% of a first component, 1-90% of a second component, 1-90% of a third component and 1-97% of a fourth component by mass percentage; wherein: the first component is trifluoroiodomethane, the second component is at least one of 1,1,1, 2-tetrafluoroethane and pentafluoroethane, the third component is at least one of trans-1, 3,3, 3-tetrafluoropropene, 2,3,3, 3-tetrafluoropropene and difluoromethane, and the fourth component is at least one of 1, 1-difluoroethane, monofluoroethane, propylene, propane, dimethyl ether and isobutane.
2. An environment-friendly mixed refrigerant according to claim 2, comprising 50-68% of the first component, 9-11% of the second component, 18-32% of the third component and 5-10% of the fourth component, by mass.
3. An environment-friendly mixed refrigerant according to claim 2 comprising, in mass percent, 50% of the first component, 11% of the second component, 29% of the third component and 10% of the fourth component.
4. An environment-friendly mixed refrigerant according to claim 2 comprising, in mass percent, 52% of the first component, 11% of the second component, 27% of the third component and 10% of the fourth component.
5. An environment-friendly mixed refrigerant according to claim 2 comprising, in mass percent, 67% of the first component, 10% of the second component, 18% of the third component and 5% of the fourth component.
6. An environment-friendly mixed refrigerant according to claim 1 comprising, in mass percent, 1% of the first component, 34.5% of the second component, 62% of the third component and 2.5% of the fourth component.
7. An environment-friendly mixed refrigerant according to claim 1 comprising, in mass percent, 5% of the first component, 35% of the second component, 56% of the third component and 4% of the fourth component.
8. An environment-friendly mixed refrigerant according to claim 1 comprising, in mass percent, 14% of the first component, 10% of the second component, 66% of the third component and 10% of the fourth component.
9. An environment-friendly mixed refrigerant according to claim 1 comprising, in mass percent, 1% of the first component, 40% of the second component, 58% of the third component and 1% of the fourth component.
10. The environment-friendly mixed refrigerant according to claim 1, wherein the second component comprises 70-90% of 1,1,1, 2-tetrafluoroethane and 10-30% of pentafluoroethane by mass percent.
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