CN117431037A

CN117431037A - Environment-friendly mixed refrigerant and preparation method and application thereof

Info

Publication number: CN117431037A
Application number: CN202311401756.2A
Authority: CN
Inventors: 皇甫启捷; 吕如兵; 黄泽清; 梁祥飞
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2023-10-26
Filing date: 2023-10-26
Publication date: 2024-01-23

Abstract

The invention provides an environment-friendly mixed refrigerant, and a preparation method and application thereof. The environment-friendly mixed refrigerant comprises a first component and a second component, wherein the first component is at least one of fluoroethane or 1, 1-difluoroethane, and the second component is at least one of trans-1-chloro-3, 3-trifluoropropene or hexafluorobutene. The application provides an environment-friendly mixed refrigerant is through first component and second component mutually supporting, utilizes the characteristics of the balanced each component refrigerant nature of mixed working medium to and the temperature of zeotropic refrigerant slides, and it is little with heat transfer fluid's heat transfer difference in temperature, and the irreversible loss of heat transfer process is little, can improve heat exchange efficiency for the system circulation is close Lorenz circulation, improves system energy efficiency. In addition, the environment-friendly mixed refrigerant provided by the application has good environment protection and wide application prospect in the field of refrigeration devices.

Description

Environment-friendly mixed refrigerant and preparation method and application thereof

Technical Field

The invention relates to the technical field of refrigerants, in particular to an environment-friendly mixed refrigerant and a preparation method and application thereof.

Background

In recent years, in order to cope with global warming and the frequent occurrence of extreme weather, a series of policies have been internationally established to accelerate the elimination of HCFCs (hydrochlorofluorocarbons) refrigerants and to gradually reduce the use amount of HFCs (hydrofluorocarbons) to limit the use of high GWP (global warming potential) refrigerants. According to the montreal protocol and the kyoto protocol, the next generation of refrigerants should have the characteristics of zero ODP (ozone depletion potential), low GWP. The medium-temperature heat pump working medium commonly used in the market at present mainly comprises R134a, and although the medium-temperature heat pump working medium has good thermal performance and ODP is 0 and is not flammable, the warming potential value (GWP=1530) is very high, so that a substitute working medium with excellent environmental protection performance is urgently needed to be searched.

Halogenated olefins are a class of environmentally friendly chemicals that typically have very low GWP and are considered one of the targets for future refrigerants. In the prior art, HFO (hydrocarbon fluorocarbon) refrigerants such as halogenated olefins R1234yf, R1234ze (E), R1233zd (E) can significantly reduce the GWP of the system, but they all have defects such as low heating capacity per unit volume, large low-temperature hold-down ratio, high system sealing requirement (saturated vapor pressure is negative pressure at low temperature) and cannot meet the system requirement.

In view of this, the present invention has been made.

Disclosure of Invention

The invention mainly aims to provide an environment-friendly mixed refrigerant and a preparation method and application thereof, and aims to solve the problems that in the prior art, although HFO refrigerants such as halogenated olefins R1234yf, R1234ze (E), R1233zd (E) and the like can obviously reduce the GWP of a system, the refrigerant has the defects of low heating capacity per unit volume, large low-temperature hold-down ratio, high system sealing requirement and the like (the saturated vapor pressure is negative pressure at low temperature) and cannot meet the system requirement.

In order to achieve the above object, according to one aspect of the present invention, there is provided an environmentally friendly mixed refrigerant comprising a first component selected from at least one of fluoroethane or 1, 1-difluoroethane and a second component selected from at least one of trans-1-chloro-3, 3-trifluoropropene or hexafluorobutene.

Further, in the environment-friendly mixed refrigerant, the mass content of the first component is 15-60%, and the mass content of the second component is 40-85%.

Further, the environment-friendly mixed refrigerant comprises 15-40% of fluoroethane and 60-85% of trans-1-chloro-3, 3-trifluoropropene by mass percent.

Further, the environment-friendly mixed refrigerant comprises 35-60% of fluoroethane and 40-65% of hexafluorobutene by mass percent.

Further, the environment-friendly mixed refrigerant comprises 40-45% of 1, 1-difluoroethane and 55-60% of hexafluorobutene by mass percent.

Further, the GWP of the environment-friendly mixed refrigerant is less than or equal to 150.

Further, the environment-friendly mixed refrigerant is composed of a first component and a second component.

In order to achieve the above object, according to another aspect of the present invention, there is provided a method for preparing the above-described environment-friendly mixed refrigerant, comprising: and uniformly mixing the raw materials containing the first component and the second component to obtain the environment-friendly mixed refrigerant.

Further, the first component and the second component are each independently liquid.

According to a third aspect of the present invention, there is provided the use of the above-described environmentally friendly mixed refrigerant in a refrigeration device.

By means of the technical scheme, the environment-friendly mixed refrigerant provided by the application is matched with the second component through the first component, the characteristics of balanced refrigerant properties of the components of the mixed working medium are utilized, the temperature of the non-azeotropic refrigerant slides, the heat exchange temperature difference between the non-azeotropic refrigerant and the heat exchange fluid is small, the irreversible loss in the heat exchange process is small, the heat exchange efficiency can be improved, the system circulation is close to Lorenz circulation, and the energy efficiency of the system is improved.

In addition, the environment-friendly mixed refrigerant provided by the application has good environment protection and wide application prospect in the field of refrigeration devices.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 shows a schematic diagram of a pure working medium refrigerant heat exchange process;

fig. 2 shows a schematic diagram of a heat exchange process of a non-azeotropic mixture working medium.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present invention will be described in detail with reference to examples.

As analyzed in the background of the present application, in the prior art, HFO refrigerants such as haloolefins R1234yf, R1234ze (E), R1233zd (E) and the like can significantly reduce the GWP of the system, but they all have defects (the saturated vapor pressure is negative pressure at low temperature) including low heating capacity per unit volume, large low-temperature hold-down ratio, high system sealing requirement and the like, and cannot meet the system requirement. In order to solve the problem, the application provides an environment-friendly mixed refrigerant, and a preparation method and application thereof.

In one exemplary embodiment of the present application, an environmentally friendly mixed refrigerant is provided, which includes a first component selected from at least one of fluoroethane (R161) or 1, 1-difluoroethane (R152 a), and a second component selected from at least one of trans-1-chloro-3, 3-trifluoropropene [ R1233zd (E) ] or hexafluorobutene [ R1336mzz (Z) ]

The application provides an environment-friendly mixed refrigerant is through first component and second component mutually supporting, utilizes the characteristics of the balanced each component refrigerant nature of mixed working medium to and the temperature of zeotropic refrigerant slides, and it is little with heat transfer fluid's heat transfer difference in temperature, and the irreversible loss of heat transfer process is little, can improve heat exchange efficiency for the system circulation is close Lorenz circulation, improves system energy efficiency. In addition, the environment-friendly mixed refrigerant provided by the application has good environment protection and wide application prospect in the field of refrigeration devices.

As shown in fig. 1, for a pure working medium refrigerant, in a constant pressure state, the two-phase temperature is constant, namely the heat exchange process temperature is a constant value; in the case of non-azeotropic working media, as shown in fig. 2, particularly in the case of mixed working media with large slip temperature, the two-phase temperature in the heat exchange process changes with dryness, which is shown as follows: the evaporating temperature gradually increases in the evaporating process, and the condensing temperature gradually decreases in the condensing process. The refrigerant is greatly different in application process due to the difference of physical properties. And if the temperature change of the external heat exchange fluid is the same, a non-azeotropic working medium with slip temperature is adopted, the heat exchange temperature difference between the non-azeotropic working medium and the heat exchange fluid is small, the irreversible loss in the heat exchange process is small, and the heat exchange efficiency is improved. The area enclosed by the solid line below the evaporating temperature (solid line) represents the refrigerating capacity of the system circulation, the area enclosed by the solid line is the power, and the non-azeotropic working medium (with large slip temperature) can be intuitively seen from the graph that the system circulation power of the non-azeotropic working medium is lower than that of the pure working medium (or near-azeotropic working medium), and the refrigerating capacity is larger than that of the pure working medium, so that when the temperature change of the outside heat exchange fluid is matched with the slip temperature of the mixed working medium, the energy efficiency of the system is better.

According to the analysis, the environment-friendly mixed refrigerant provided by the application is a non-azeotropic working medium with large slip temperature, and the energy efficiency of the Lorenz circulation lifting system is approximated by utilizing the temperature slip, so that the energy efficiency of the environment-friendly mixed refrigerant is far higher than that of the mixed working medium formed by near-azeotropic working medium.

In order to further reduce the heat exchange temperature difference and the irreversible loss during the heat exchange process, it is preferable that in some embodiments, the mass content of the first component in the environmentally friendly mild refrigerant is 15 to 60% and the mass content of the second component is 40 to 85% in terms of mass percent.

Typically, but not by way of limitation, in the environmentally friendly mixed refrigerants provided herein, the first component may be present in an amount by mass ranging from 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60% or any two values, and the second component may be present in an amount by mass ranging from 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80% or any two values.

In some embodiments, the environmentally friendly mixed refrigerant comprises 15 to 40% fluoroethane (R161), 60 to 85% trans-1-chloro-3, 3-trifluoropropene [ R1233zd (E) ]; in the environment-friendly mixed refrigerant, the mass of fluoroethane (R161) and trans-1-chloro-3, 3-trifluoropropene [ R1233zd (E) ] is, for example, 15:85, 20:80, 25:75, 30:70, 35:65, 40:60 or any two values.

In other embodiments, the environmentally friendly mixed refrigerant comprises 35 to 60% fluoroethane (R161), 40 to 65% hexafluorobutene [ R1336mzz (Z) ], in mass percent. In the environment-friendly mixed refrigerant, the mass of fluoroethane (R161) and hexafluorobutene [ R1336mzz (Z) ] is 35:65, 40:60, 45:55, 50:50, 55:45, 60:40 or any two values.

In other embodiments, the environmentally friendly mixed refrigerant comprises 40-45% 1, 1-fluoroethane (R152 a), 55-60% hexafluorobutene [ R1336mzz (Z) ]. In the environment-friendly mixed refrigerant, the mass of the 1, 1-fluoroethane (R152 a) and the hexafluorobutene [ R1336mzz (Z) ] is, for example, 40:60, 42:58, 45:55 or a range of values consisting of any two values.

In order to further improve the environmental protection performance, the GMP of the environment-friendly mixed refrigerant provided by the application is less than or equal to 150, so that the environment-friendly mixed refrigerant has more excellent environmental protection performance.

In other embodiments, the environment-friendly mixed refrigerant is composed of the first component and the second component, and does not contain other substances, so that the system energy efficiency of the environment-friendly mixed refrigerant is further improved, the pumping power is reduced, the preparation process is further simplified, and the energy consumption is further saved.

In a second exemplary embodiment of the present application, the present application further provides a method for preparing the above-mentioned environment-friendly mixed refrigerant, the method comprising the steps of: and uniformly mixing the raw materials containing the first component and the second component to obtain the environment-friendly mixed refrigerant.

The preparation method of the environment-friendly mixed refrigerant is simple in process, easy to operate, suitable for large-scale production, and capable of further effectively reducing cost and energy consumption.

In order to further reduce the energy consumption, in some embodiments, it is preferable that the first component and the second component are mixed at room temperature, especially when the first component and the second component are each independently liquid, the environment-friendly mixed refrigerant is more easily prepared by mixing, the mixing operation process is simplified, and the energy consumption is further reduced.

In a third exemplary embodiment of the present application, there is also provided the use of the above-described environmentally friendly mixed refrigerant in a refrigeration device.

The environment-friendly mixed refrigerant provided by the application is matched with the second component through the first component, the characteristics of the refrigerant property agents of the components are balanced by utilizing the mixed working medium, and the temperature of the non-azeotropic refrigerant slides, so that the temperature difference between the non-azeotropic refrigerant and the heat exchange fluid is small, the irreversible loss in the heat exchange process is small, the heat exchange efficiency can be improved, and the environment-friendly mixed refrigerant has a wide application prospect in the field of refrigeration devices.

The specific type of the above-described refrigerating apparatus is not limited, and refrigerating apparatuses using a refrigerant may be used, including but not limited to a refrigerator and the like.

In some embodiments, the refrigeration device includes a compressor, a condenser, an evaporator, and a throttling device as main components, and the heat transfer fluid in the system is a refrigerant. The evaporator and condenser are heat exchangers, any type of heat exchanger may be used in this application, and in particular counter-flow heat exchangers, or heat exchangers having a counter-flow tendency are preferred.

The advantageous effects of the present application will be further described below with reference to examples and comparative examples.

The basic parameters of the single component refrigerants in the following examples and comparative examples are shown in table 1 below.

TABLE 1

Note that there may be minor differences in GWP for the different versions, shown herein is mainly referenced IPCC AR6 (2021); other parameters are given by REFPROP 10.0).

A plurality of specific examples and comparative examples are given below, wherein the proportions of the components are mass percentages, and the sum of the mass percentages of the constituent substances of each mixed working medium is 100%.

Example 1

The embodiment provides an environment-friendly mixed refrigerant, which is prepared according to the following steps:

fluoroethane (R161) and trans-1-chloro-3, 3-trifluoropropene (R1233 zd (E)) are physically and uniformly mixed at the mass percentage of 15:85 under the normal temperature liquid phase to obtain the environment-friendly mixed refrigerant.

Example 2

fluoroethane (R161) and trans-1-chloro-3, 3-trifluoropropene (R1233 zd (E)) are physically and uniformly mixed at the mass percentage of 30:70 at the normal temperature and the liquid phase to obtain the environment-friendly mixed refrigerant.

Example 3

fluoroethane (R161) and trans-1-chloro-3, 3-trifluoropropene (R1233 zd (E)) are physically and uniformly mixed at the mass percentage of 40:60 at the normal temperature and the liquid phase to obtain the environment-friendly mixed refrigerant.

Example 4

the fluoroethane (R161) and hexafluorobutene (R1336 mzz (Z)) are physically and uniformly mixed according to the mass percentage of 35:65 at the normal temperature liquid phase, so as to obtain the environment-friendly mixed refrigerant.

Example 5

the fluoroethane (R161) and hexafluorobutene (R1336 mzz (Z)) are physically and uniformly mixed according to the mass percentage of 55:45 at the normal temperature liquid phase, so as to obtain the environment-friendly mixed refrigerant.

Example 6

the fluoroethane (R161) and hexafluorobutene (R1336 mzz (Z)) are physically and uniformly mixed according to the mass percentage of 60:40 at the normal temperature liquid phase, so as to obtain the environment-friendly mixed refrigerant.

Example 7

the two components of 1, 1-difluoroethane (R152 a) and hexafluorobutene (R1336 mzz (Z)) are physically and uniformly mixed according to the mass percentage of 40:60 at normal temperature liquid phase, so as to obtain the environment-friendly mixed refrigerant.

Example 8

the two components of 1, 1-difluoroethane (R152 a) and hexafluorobutene (R1336 mzz (Z)) are physically and uniformly mixed according to the mass percentage of 45:55 at the normal temperature liquid phase, so as to obtain the environment-friendly mixed refrigerant.

Example 9

fluoroethane (R161) and trans-1-chloro-3, 3-trifluoropropene (R1233 zd (E)) are physically and uniformly mixed at the normal temperature and liquid phase according to the mass percentage of 10:90, so as to obtain the environment-friendly mixed refrigerant.

Example 10

the fluoroethane (R161) and the trans-1-chloro-3, 3-trifluoropropene (R1233 zd (E)) are physically and uniformly mixed according to the mass percentage of 70:30 at the normal temperature liquid phase to obtain the environment-friendly mixed refrigerant.

Example 11

fluoroethane (R161) and trans-1-chloro-3, 3-trifluoropropene (R1233 zd (E)) are physically and uniformly mixed at the mass percentage of 95:5 at the normal temperature and the liquid phase to obtain the environment-friendly mixed refrigerant.

Example 12

the fluoroethane (R161) and hexafluorobutene (R1336 mzz (Z)) are physically and uniformly mixed according to the mass percentage of 25:75 at the normal temperature liquid phase, so as to obtain the environment-friendly mixed refrigerant.

Example 13

the fluoroethane (R161) and hexafluorobutene (R1336 mzz (Z)) are physically and uniformly mixed according to the mass percentage of 70:30 at the normal temperature liquid phase, so as to obtain the environment-friendly mixed refrigerant.

Example 14

the fluoroethane (R161) and hexafluorobutene (R1336 mzz (Z)) are physically and uniformly mixed according to the mass percentage of 95:5 at the normal temperature liquid phase, so as to obtain the environment-friendly mixed refrigerant.

Example 15

the two components of 1, 1-difluoroethane (R152 a) and hexafluorobutene (R1336 mzz (Z)) are physically and uniformly mixed according to the mass percentage of 30:70 at the normal temperature liquid phase, so as to obtain the environment-friendly mixed refrigerant.

Example 16

the two components of 1, 1-difluoroethane (R152 a) and hexafluorobutene (R1336 mzz (Z)) are physically and uniformly mixed according to the mass percentage of 70:30 at the normal temperature liquid phase, so as to obtain the environment-friendly mixed refrigerant.

Example 17

The two components of 1, 1-difluoroethane (R152 a) and hexafluorobutene (R1336 mzz (Z)) are physically and uniformly mixed according to the mass percentage of 95:5 at the normal temperature liquid phase, so as to obtain the environment-friendly mixed refrigerant.

Comparative example 1

The comparative example provides an environment-friendly mixed refrigerant, which is prepared according to the following steps:

the two components of 1, 2-tetrafluoroethane (R134 a) and trans-1-chloro-3, 3-trifluoropropene (R1233 zd (E)) are physically and uniformly mixed according to the mass percentage of 15:85 at the normal temperature liquid phase, so as to obtain the environment-friendly mixed refrigerant.

Comparative example 2

the two components of 1, 2-tetrafluoroethane (R134 a) and hexafluorobutene (R1336 mzz (Z)) are physically and uniformly mixed according to the mass percentage of 60:40 at the normal temperature liquid phase, and the environment-friendly mixed refrigerant is obtained.

Comparative example 3

the fluoroethane (R161) and the 1, 2-tetrafluoroethane (R134 a) are physically and uniformly mixed according to the mass percentage of 35:65 at the normal temperature and the liquid phase to obtain the environment-friendly mixed refrigerant.

Comparative example 4

the two components of 1, 1-difluoroethane (R152 a) and 1, 3-pentafluoropropane (R245 fa) are physically and uniformly mixed according to the mass percentage of 40:60 at normal temperature under liquid phase, so as to obtain the environment-friendly mixed refrigerant.

Comparative example 5

the two components of 1, 1-difluoroethane (R152 a) and 2, 3-tetrafluoropropene (R1234 yf) are physically and uniformly mixed at the normal temperature and liquid phase according to the mass percentage of 40:60, so as to obtain the environment-friendly mixed refrigerant.

Comparative example 6

This comparative example provides a refrigerant that is 1, 2-tetrafluoroethane (R134 a).

The basic parameters of the refrigerants provided in the above examples and comparative examples are summarized in table 2 below:

TABLE 2

As can be seen from Table 2, the environmental performance of the mixed working media provided in examples 1-8 of the present application is superior to R134a, and GWP is less than 150; and the sliding temperature is between 16.5 and 29.1 ℃, and the small temperature difference heat exchange at each part of the heat exchanger can be realized by utilizing the matching of the sliding temperature and the temperature difference between the inlet and the outlet of the heat exchange medium, so that the irreversible loss in the heat exchange process is reduced, and the aim of improving the energy efficiency is fulfilled. The mass ratios of the components in examples 11 to 17 result in a refrigerant with a small temperature slip, or GWP of greater than 150, which indicates that the use of a specific mass ratio of the first component to the second component in combination is more advantageous for obtaining a refrigerant with excellent performance. In comparative examples 1-5, one of the two components was replaced while the other two components were kept unchanged, the energy efficiency improvement of the system was lower than that of the present proposal, and the GWP requirements could not be satisfied by the partial proportions.

The mixed refrigerants of R134a and the above examples and comparative examples were compared by simulation calculation, and the design conditions of the refrigerating apparatus were: the inlet and outlet temperatures of the evaporator side heat exchange fluid are 300.15K and 285.15K respectively, the inlet and outlet temperatures of the condenser side heat exchange fluid are 323.15K and 338.15K respectively, the refrigerant at the outlet of the evaporator is in an overheated state, the superheat degree is 1K, the refrigerant at the outlet of the condenser is in a supercooled state, the outlet temperature is 328.15K, and the adiabatic efficiency of the compressor is 0.7.

Under the nominal working condition of the dehumidifier, system simulation calculation is carried out, and the comparison results of the system parameters and energy efficiency of the example and the comparative example and R134a are shown in Table 3.

TABLE 3 Table 3

As can be seen from Table 3, the thermodynamic performance of the mixed working medium provided in examples 1-8 is superior to R134a, the volume refrigerating capacity of most of the mixed refrigerant is much higher than that of R134a, the system volume can be reduced, and the compression ratio of the compressor can be remarkably reduced by the mixed working medium. The energy efficiency of the mixed refrigerant system can be improved by 10.1% -19.6% compared with R134a by adopting the mixed refrigerants in the embodiments 1-8 and matching with corresponding flow path configurations. The COP improvement amplitude of examples 9-17 and comparative examples 1-6 is lower than that of examples 1-8, which shows that when each component in the environment-friendly mixed refrigerant provided by the application has a specific mass ratio and composition, the characteristics among all substances and the heat transfer condition of the fluid on the inner side and the outer side of the heat exchanger are well balanced, so that the refrigerant can have good environmental characteristics, and the energy efficiency of the system can be effectively improved. Therefore, the refrigerant provided by the invention can give consideration to both GWP and system energy efficiency, and becomes a good alternative scheme of the high GWP working medium under the trend that the refrigerant is accelerated to develop towards the direction of zero ODP and low GWP.

From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: the application provides an environment-friendly mixed refrigerant is through first component and second component mutually supporting, utilizes the characteristics of the balanced each component refrigerant nature of mixed working medium to and the temperature of zeotropic refrigerant slides, and it is little with heat transfer fluid's heat transfer difference in temperature, and the irreversible loss of heat transfer process is little, can improve heat exchange efficiency for the system circulation is close Lorenz circulation, improves system energy efficiency. In addition, the environment-friendly mixed refrigerant provided by the application has good environment protection and wide application prospect in the field of refrigeration devices.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An environment-friendly mixed refrigerant is characterized by comprising a first component and a second component, wherein the first component is at least one of fluoroethane or 1, 1-difluoroethane, and the second component is at least one of trans-1-chloro-3, 3-trifluoropropene or hexafluorobutene.

2. The environment-friendly mixed refrigerant according to claim 1, wherein the mass content of the first component is 15-60% and the mass content of the second component is 40-85% in terms of mass percent.

3. The environment-friendly mixed refrigerant according to claim 1, wherein the environment-friendly mixed refrigerant comprises 15-40% of fluoroethane and 60-85% of trans-1-chloro-3, 3-trifluoropropene in mass percent.

4. The environment-friendly mixed refrigerant according to claim 1, wherein the environment-friendly mixed refrigerant comprises 35-60% of fluoroethane and 40-65% of hexafluorobutene in mass percent.

5. The environment-friendly mixed refrigerant according to claim 1, wherein the environment-friendly mixed refrigerant comprises 40-45% of 1, 1-difluoroethane and 55-60% of hexafluorobutene in mass percent.

6. The environmentally friendly mixed refrigerant according to any one of claims 1 to 5, wherein GWP of the environmentally friendly mixed refrigerant is 150 or less.

7. The mixed refrigerant according to any one of claims 1 to 5, wherein the mixed refrigerant consists of the first component and the second component.

8. A method for producing the environment-friendly mixed refrigerant according to any one of claims 1 to 7, characterized by comprising: and uniformly mixing the raw materials comprising the first component and the second component to obtain the environment-friendly mixed refrigerant.

9. The method of claim 8, wherein the temperature of the mixing is room temperature and the first component and the second component are each independently liquid.

10. Use of the environmentally friendly mixed refrigerant according to any one of claims 1 to 7 in a refrigeration device.