Mixed refrigerant, composition, refrigerating system and refrigerating equipment

Abstract

The invention relates to a mixed refrigerant, a composition, a refrigerating system and refrigerating equipment, and belongs to the technical field of refrigerants, and the mixed refrigerant in the embodiment comprises a first component, a second component and a third component; wherein the first component comprises 3, 3, 3-trifluoropropyne, the second component comprises dimethyl ether, the third component comprises at least one of propylene and cyclopropane, and the sum of the mass percentages of all the components is 100%. The GWP of the mixed refrigerant is smaller than 150, the ODP of the mixed refrigerant is 0, the mixed refrigerant has the obvious environment-friendly advantage, the normal-pressure boiling point of the mixture can be low under the proper proportion, and the mixed refrigerant has the good low-temperature refrigerating capacity.

Description

Technical Field

[0001] The present invention belongs to the technical field of refrigerants, and in particular relates to a mixed refrigerant, a composition, a refrigeration system and a refrigeration device. Background Art

[0002] Refrigerants are the blood of the refrigeration system and have become the key to restricting the development of the industry. Hydrofluorocarbons (HFCs) are third-generation refrigerants. Due to their zero ozone depletion potential, they are widely used to replace chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs). However, HFCs are unsustainable refrigerants. The global warming potential (GWP) of many commonly used HFCs is thousands of times that of carbon dioxide, and their emissions account for about 2-3% of the world's total greenhouse gas emissions.

[0003] R134a, a commonly used refrigerant in air conditioning systems, has a GWP of 1300 and has been included in the control catalog. Its gradual elimination has become an inevitable trend. In order to meet environmental protection requirements, it is urgent to find a refrigerant that does not damage the ozone layer and has a low GWP. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the present invention proposes a mixed refrigerant and a refrigeration system that neither damages the ozone layer nor has a low GWP.

[0005] According to the first aspect of an embodiment of the present application, a mixed refrigerant is provided, which includes a first component, a second component and a third component; wherein the first component includes 3,3,3-trifluoropropyne, the second component includes dimethyl ether, the third component includes at least one of propylene and cyclopropane, and the sum of the mass percentages of the components is 100%.

[0006] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the first component is 3,3,3-trifluoropropyne, the second component is dimethyl ether, and the third component is propylene.

[0007] In combination with the first aspect, in an optional implementation of an embodiment of the present application, the mixed refrigerant is composed of 1%-48% by weight of 3,3,3-trifluoropropyne, 1%-56% by weight of dimethyl ether and 4%-92% by weight of propylene, calculated by mass percentage.

[0008] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the first component is 3,3,3-trifluoropropyne, the second component is dimethyl ether, and the third component is cyclopropane.

[0009] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the mixed refrigerant is composed of 1%-60% by weight of 3,3,3-trifluoropropyne, 4%-44% by weight of dimethyl ether and 12%-92% by weight of cyclopropane, measured in mass percentage.

[0010] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the first component is 3,3,3-trifluoropropyne, the second component is dimethyl ether, and the third component is propylene and cyclopropane.

[0011] In combination with the first aspect, in an optional implementation of an embodiment of the present application, the mixed refrigerant is composed, in terms of mass percentage, of 4%-32% by weight of the first component, 8%-72% by weight of the second component, 8%-72% by weight of propylene and 12%-76% by weight of cyclopropane.

[0012] According to a second aspect of an embodiment of the present application, a composition is proposed, comprising a lubricant and the mixed refrigerant described in the first aspect of an embodiment of the present application.

[0013] In combination with the second aspect, in an optional implementation of an embodiment of the present application, the lubricant includes a combination of one or more of silicone oil, polyalkylbenzene (PAB), polyol ester (POE), polyalkylene glycol (PAG), polyalkylene glycol ester (PAG ester), polyethylene ether (PVE), and poly(α-olefin).

[0014] According to a third aspect of the embodiment of the present application, a refrigeration system is proposed, in which the mixed refrigerant proposed in the first aspect of the embodiment of the present application or the composition proposed in the second aspect of the present application circulates.

[0015] According to a fourth aspect of an embodiment of the present application, a refrigeration device is provided, wherein the refrigeration device adopts the refrigeration system described in the third aspect of the embodiment of the present application.

[0016] The technical solution of this embodiment may include the following beneficial effects: the mixed refrigerant of this embodiment has a GWP of less than 150 and an ODP value (ozone depletion potential) of 0, which has obvious environmental advantages. The mixed refrigerant of this embodiment has a unit volume cooling capacity better than R134a, and the system volume is more compact than R134a; the energy efficiency of the mixed refrigerant of this embodiment is basically equivalent to or even better than that of R134a.

[0017] Regarding the GWP value of the mixed refrigerant of this embodiment, the GWP of 3,3,3-trifluoropropyne (TFP) is 11, the GWP of dimethyl ether (RE170) is 1, the GWP of propylene (R1270) is 2, and the GWP of cyclopropane (RC270) is 86. The above components have excellent environmental performance, and their GWPs are all less than 150. The environmental performance of the refrigerant can be improved by mixing.

[0018] Regarding the thermodynamic properties of the mixed refrigerant of this embodiment, the main measurement indicators are COP (coefficient of performance) and relative volumetric refrigeration capacity. Compared with R134a, the relative volumetric refrigeration capacity of 3,3,3-trifluoropropyne (TFP) is larger, and the relative COP is lower than R134a. The relative volumetric refrigeration capacity of dimethyl ether (RE170) is lower, and the relative COP is higher. The relative volumetric refrigeration capacity and relative COP of propylene (R1270) are both high, and the volumetric refrigeration capacity of cyclopropane (RC270) is equivalent to R134a, and the COP is higher than R134a. Therefore, by mixing three of the working fluids, at an appropriate ratio, the thermodynamic properties of the mixture can be made equivalent to or higher than R134a.

[0019] Regarding the atmospheric boiling point temperature of this embodiment: it is related to the components and compositions of the refrigerant. The atmospheric boiling points of 3,3,3-trifluoropropyne (TFP) and propylene (R1270) are both less than -46°C. By mixing the three working fluids, at an appropriate ratio, the atmospheric boiling point of the mixture can be lowered, and it has good low-temperature refrigeration capacity. DETAILED DESCRIPTION

[0020] The present invention is further illustrated below through the description of specific implementation modes, but this is not a limitation of the present invention. Those skilled in the art can make various modifications or improvements based on the basic idea of ​​the present invention, but as long as they do not deviate from the basic idea of ​​the present invention, they are all within the scope of the present invention.

[0021] In the relevant technology, the third-generation refrigerant hydrofluorocarbons (HFCs) are widely used to replace chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) because their ozone depletion potential is zero. However, the GWP value of HFCs is thousands of times that of carbon dioxide, which does not meet environmental protection requirements. The currently widely used R134a refrigerant is also included in the control catalogue because of its GWP of 1300.

[0022] In order to solve the above technical problems, the present embodiment proposes a mixed refrigerant, the mixed refrigerant includes a first component, a second component and a third component; wherein the first component includes 3,3,3-trifluoropropyne, the second component includes dimethyl ether, the third component includes at least one of propylene and cyclopropane, and the sum of the mass percentages of each component is 100%. The mixed refrigerant proposed in this embodiment has a GWP of less than 150, an ODP value (ozone depletion potential) of 0, and has obvious environmental advantages. In addition, the unit volume refrigeration capacity of the mixed refrigerant of this embodiment is better than that of R134a, the system volume is more compact than that of R134a, and the energy efficiency is basically equivalent to or even better than that of R134a, and it can be used as an excellent substitute for R134a refrigerant. Under appropriate proportions, the atmospheric boiling point of the mixture can be made lower, and it has good low-temperature refrigeration capacity.

[0023] The present embodiment is described in detail below. The following implementation modes and examples may be combined with each other unless there is any conflict.

[0024] This embodiment proposes a mixed refrigerant, which includes a first component, a second component and a third component; wherein the first component includes 3,3,3-trifluoropropyne, the second component includes dimethyl ether, the third component includes at least one of propylene and cyclopropane, and the sum of the mass percentages of the components is 100%.

[0025] In one embodiment, the first component is 3,3,3-trifluoropropyne, the second component is dimethyl ether, and the third component is propylene. Preferably, the mixed refrigerant is composed of 1%-48% by weight of 3,3,3-trifluoropropyne, 1%-56% by weight of dimethyl ether, and 4%-92% by weight of propylene, in terms of mass percentage.

[0026] In one embodiment, the first component is 3,3,3-trifluoropropyne, the second component is dimethyl ether, and the third component is cyclopropane. Preferably, the mixed refrigerant is composed of 1%-60% by weight of 3,3,3-trifluoropropyne, 4%-44% by weight of dimethyl ether, and 12%-92% by weight of cyclopropane, in terms of mass percentage.

[0027] In one embodiment, the first component is 3,3,3-trifluoropropyne, the second component is dimethyl ether, and the third component is propylene and cyclopropane. Preferably, in terms of mass percentage, the mixed refrigerant is composed of 4%-32% by weight of the first component, 8%-72% by weight of the second component, 8%-72% by weight of propylene and 12%-76% by weight of cyclopropane.

[0028] This embodiment also proposes a composition, comprising a lubricant and the mixed refrigerant proposed in the above embodiment. Further, the lubricant includes a combination of one or more of silicone oil, polyalkylbenzene (PAB), polyol ester (POE), polyalkylene glycol (PAG), polyalkylene glycol ester (PAG ester), polyvinyl ether (PVE), and poly (α-olefin). In practical applications, the above reagents can be flexibly selected according to the needs of different refrigeration systems.

[0029] This embodiment also provides a refrigeration system, in which the mixed refrigerant or the composition provided in the above embodiment flows.

[0030] The GWP value of the mixed refrigerant in this embodiment is lower than 150, and the ODP value is 0.

[0031] This embodiment also provides a refrigeration system, in which the mixed refrigerant proposed in the above embodiment of the present application flows. The refrigeration system of this embodiment can be used as a refrigeration system for an air conditioner, and can also be used as a refrigeration system for a refrigerator.

[0032] Specifically, the refrigeration system of this embodiment includes a compressor, a condenser, a throttling device and an evaporator, wherein the exhaust port of the compressor is connected to the air inlet of the condenser through a refrigerant pipeline, the air outlet of the condenser is connected to the air inlet of the throttling device through a refrigerant pipeline, the air outlet of the throttling device is connected to the air inlet of the evaporator through a refrigerant pipeline, and the air outlet of the evaporator is connected to the air intake of the compressor through a refrigerant pipeline. The mixed refrigerant proposed in the above embodiment flows through the refrigerant pipeline.

[0033] Among them: The compressor is the core component of the refrigeration system. Its main function is to suck in low-temperature and low-pressure gaseous refrigerant, discharge high-temperature and high-pressure gaseous refrigerant after compression, and provide power for the circulation of refrigerant in the system. The types of compressors include piston type, screw type, centrifugal type, etc. Different types of compressors are suitable for different refrigeration needs and occasions.

[0034] The function of the condenser is to cool the high-temperature and high-pressure gaseous refrigerant and condense it into high-pressure liquid refrigerant. In this process, the refrigerant releases a large amount of heat, which is usually taken away by cooling media such as air or water. The condenser structure can be composed of pipes and heat sinks to increase the heat dissipation area and improve the cooling efficiency.

[0035] The main function of the throttling device is to throttle and reduce the pressure of high-pressure liquid refrigerant, turning it into low-temperature and low-pressure liquid refrigerant, and then entering the evaporator. The types of throttling devices include capillary tubes, thermal expansion valves, electronic expansion valves, etc. Different throttling devices have different adjustment performance and application range.

[0036] The evaporator is a device in a refrigeration system that absorbs heat from the surrounding environment and evaporates the low-temperature, low-pressure liquid refrigerant into a low-temperature, low-pressure gaseous refrigerant, thereby achieving the purpose of refrigeration. The evaporator is usually composed of pipes and fins to increase the contact area with the air or the object being cooled and improve the heat exchange efficiency.

[0037] This embodiment also provides a refrigeration device, which uses the refrigeration system of the above embodiment of the present application. The refrigeration device can be any one of a refrigerator, a freezer, a water dispenser, a car air conditioner, a central air conditioner, a dehumidifier, a cold storage, a commercial refrigeration device, a water chiller, an ice cream machine, and a freezing and condensing unit.

[0038] The mixed refrigerant of this embodiment meets the requirements of a new environmentally friendly refrigerant, has a thermal performance similar to that of R134a, a temperature glide of less than 5°C, a unit volume refrigeration capacity greater than that of R134a, has good performance, and can replace the widely used R134a refrigerant. Under an appropriate ratio, the atmospheric boiling point of the mixture can be lowered, and has good low-temperature refrigeration capacity.

[0039] The performance of the mixed refrigerant of this embodiment is described in detail below in combination with specific embodiments and comparative examples.

[0040] The preparation method of the mixed refrigerant of this embodiment is to physically mix the first component (3,3,3-trifluoropropyne), the second component (dimethyl ether) and the third component (propylene and / or cyclopropane) according to mass percentage in a liquid phase state at room temperature. The basic parameters of each component substance are shown in Table 1.

[0041] Table 1: Basic parameters of each component

[0042]

[0043] In Example 1 to Example 20, and Comparative Example 1 to Comparative Example 6, the components are mixed in different proportions to prepare different mixed refrigerants. The formulas of the different mixed refrigerants are shown in Table 2.

[0044] Table 2: Recipes of different mixed refrigerants

[0045]

[0046]

[0047] in:

[0048] In Example 1, in a liquid state at room temperature, 4% by mass of 3,3,3-trifluoropropyne (TFP), 4% by mass of dimethyl ether (RE170) and 92% by mass of propylene (R1270) are physically mixed uniformly to obtain a mixed refrigerant.

[0049] In Example 2, in a liquid state at room temperature, 8% by mass of 3,3,3-trifluoropropyne (TFP), 8% by mass of dimethyl ether (RE170) and 84% by mass of propylene (R1270) are physically mixed uniformly to obtain a mixed refrigerant.

[0050] In Example 3, in a liquid state at room temperature, 16% by mass of 3,3,3-trifluoropropyne (TFP), 12% by mass of dimethyl ether (RE170) and 72% by mass of propylene (R1270) were physically mixed uniformly to obtain a mixed refrigerant.

[0051] In Example 4, in a liquid state at room temperature, 24% by mass of 3,3,3-trifluoropropyne (TFP), 8% by mass of dimethyl ether (RE170) and 68% by mass of propylene (R1270) were physically mixed uniformly to obtain a mixed refrigerant.

[0052] In Example 5, in a liquid state at room temperature, 36% by mass of 3,3,3-trifluoropropyne (TFP), 56% by mass of dimethyl ether (RE170) and 8% by mass of propylene (R1270) were physically mixed uniformly to obtain a mixed refrigerant.

[0053] In Example 6, in a liquid state at room temperature, 44% by mass of 3,3,3-trifluoropropyne (TFP), 4% by mass of dimethyl ether (RE170) and 52% by mass of propylene (R1270) were physically mixed uniformly to obtain a mixed refrigerant.

[0054] In Example 7, in a liquid state at room temperature, 48% by mass of 3,3,3-trifluoropropyne (TFP), 48% by mass of dimethyl ether (RE170) and 4% by mass of propylene (R1270) are physically mixed uniformly to obtain a mixed refrigerant.

[0055] In Example 8, in a liquid state at room temperature, 4% by mass of 3,3,3-trifluoropropyne (TFP), 4% by mass of dimethyl ether (RE170) and 92% by mass of cyclopropane (RC270) were physically mixed uniformly to obtain a mixed refrigerant.

[0056] In Example 9, in a liquid state at room temperature, 8% by mass of 3,3,3-trifluoropropyne (TFP), 8% by mass of dimethyl ether (RE170) and 84% by mass of cyclopropane (RC270) were physically mixed uniformly to obtain a mixed refrigerant.

[0057] In Example 10, in a liquid state at room temperature, 16% by mass of 3,3,3-trifluoropropyne (TFP), 16% by mass of dimethyl ether (RE170) and 68% by mass of cyclopropane (RC270) were physically mixed uniformly to obtain a mixed refrigerant.

[0058] In Example 11, in a liquid state at room temperature, 20% by mass of 3,3,3-trifluoropropyne (TFP), 20% by mass of dimethyl ether (RE170) and 60% by mass of cyclopropane (RC270) are physically mixed uniformly to obtain a mixed refrigerant.

[0059] In Example 12, in a liquid state at room temperature, 28% by mass of 3,3,3-trifluoropropyne (TFP), 24% by mass of dimethyl ether (RE170) and 48% by mass of cyclopropane (RC270) are physically mixed uniformly to obtain a mixed refrigerant.

[0060] In Example 13, in a liquid state at room temperature, 36% by mass of 3,3,3-trifluoropropyne (TFP), 24% by mass of dimethyl ether (RE170) and 40% by mass of cyclopropane (RC270) were physically mixed uniformly to obtain a mixed refrigerant.

[0061] In Example 14, in a liquid state at room temperature, 44% by mass of 3,3,3-trifluoropropyne (TFP), 44% by mass of dimethyl ether (RE170) and 12% by mass of cyclopropane (RC270) were physically mixed uniformly to obtain a mixed refrigerant.

[0062] In Example 15, in a liquid state at room temperature, 52% by mass of 3,3,3-trifluoropropyne (TFP), 16% by mass of dimethyl ether (RE170) and 32% by mass of cyclopropane (RC270) are physically mixed uniformly to obtain a mixed refrigerant.

[0063] In Example 16, in a liquid state at room temperature, 60% by mass of 3,3,3-trifluoropropyne (TFP), 4% by mass of dimethyl ether (RE170) and 36% by mass of cyclopropane (RC270) are physically mixed uniformly to obtain a mixed refrigerant.

[0064] In Example 17, in a liquid state at room temperature, 8% by mass of 3,3,3-trifluoropropyne (TFP), 8% by mass of dimethyl ether (RE170), 72% by mass of propylene (R1270) and 12% by mass of cyclopropane (RC270) are physically mixed to obtain a mixed refrigerant.

[0065] In Example 18, in a liquid state at room temperature, 16% by mass of 3,3,3-trifluoropropyne (TFP), 24% by mass of dimethyl ether (RE170), 16% by mass of propylene (R1270) and 44% by mass of cyclopropane (RC270) are physically mixed uniformly to obtain a mixed refrigerant.

[0066] In Example 19, in a liquid state at room temperature, 24% by mass of 3,3,3-trifluoropropyne (TFP), 8% by mass of dimethyl ether (RE170), 8% by mass of propylene (R1270) and 60% by mass of cyclopropane (RC270) are physically mixed to obtain a mixed refrigerant.

[0067] In Example 20, in a liquid state at room temperature, 32% by mass of 3,3,3-trifluoropropyne (TFP), 32% by mass of dimethyl ether (RE170), 8% by mass of propylene (R1270) and 28% by mass of cyclopropane (RC270) are physically mixed uniformly to obtain a mixed refrigerant.

[0068] In Comparative Example 1, in a liquid state at room temperature, 56% by mass of 3,3,3-trifluoropropyne (TFP), 24% by mass of dimethyl ether (RE170) and 20% by mass of propylene (R1270) were physically mixed uniformly to obtain a mixed refrigerant.

[0069] In Comparative Example 2, in a liquid state at room temperature, 80% by mass of 3,3,3-trifluoropropyne (TFP), 8% by mass of dimethyl ether (RE170) and 12% by mass of propylene (R1270) were physically mixed uniformly to obtain a mixed refrigerant.

[0070] In Comparative Example 3, in a liquid state at room temperature, 68% by mass of 3,3,3-trifluoropropyne (TFP), 16% by mass of dimethyl ether (RE170) and 16% by mass of cyclopropane (RC270) were physically mixed uniformly to obtain a mixed refrigerant.

[0071] In Comparative Example 4, in a liquid state at room temperature, 80% by mass of 3,3,3-trifluoropropyne (TFP), 4% by mass of dimethyl ether (RE170) and 16% by mass of cyclopropane (RC270) were physically mixed uniformly to obtain a mixed refrigerant.

[0072] In Comparative Example 5, in a liquid state at room temperature, 48% by mass of 3,3,3-trifluoropropyne (TFP), 24% by mass of dimethyl ether (RE170), 16% by mass of propylene (R1270) and 12% by mass of cyclopropane (RC270) were physically mixed uniformly to obtain a mixed refrigerant.

[0073] In Comparative Example 6, in a liquid state at room temperature, 56% by mass of 3,3,3-trifluoropropyne (TFP), 16% by mass of dimethyl ether (RE170), 16% by mass of propylene (R1270) and 12% by mass of cyclopropane (RC270) were physically mixed to obtain a mixed refrigerant.

[0074] Under the design working conditions: the evaporation temperature of the evaporator is 10°C, the condensation temperature of the condenser is 40°C, the gas phase at the evaporator outlet is in a superheated state with a superheat degree of 5°C, the liquid phase at the condenser outlet is in a subcooled state with a subcooling degree of 5°C, and the adiabatic efficiency of the compressor is 0.75. The cycle performance parameters of the above-mentioned embodiments 1 to 20, comparative examples 1 to 6 and R134a refrigerant in the refrigeration system are respectively used for theoretical calculations. The physical property data are all taken from REFPROP 10.0. The GWP (calculated by linear addition of mass percentage), relative unit volume cooling / heating capacity Qv (ratio with unit volume cooling / heating capacity of R134a), relative coefficient of performance COP (ratio with coefficient of performance of R134a), atmospheric boiling point (bubble point temperature) and temperature glide are compared. The comparison results are shown in Table 3 below:

[0075] Table 3: Performance comparison of different mixed refrigerants and R134a

[0076]

[0077]

[0078] From the above results, it can be seen that the GWP of the mixed refrigerant formulas of Examples 1 to 20 are all less than 150, with excellent environmental performance, and can fully meet the current Kigali Amendment's limit control requirements for refrigerants. The relative volumetric cooling capacity of all refrigerant formulas is greater than 1.1, and the relative performance coefficient is greater than 0.9. The maximum volumetric cooling capacity is increased by 60% compared with R134a, and the temperature glide is within 5°C, and the temperature glide is small. Comparative Examples 1-6 are not within the mass percentage range provided in this application, the relative volumetric cooling capacity and relative performance coefficient are small, and the temperature glide is large.

[0079] As described above, the GWP of the mixed refrigerant in the embodiment of the present application is less than 150, and the volumetric cooling capacity is better than R134a, and the thermal performance is comparable to or even better than that of R134a refrigerant, so R134a can be replaced.

[0080] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mixed refrigerant, characterized in that: The mixed refrigerant includes a first component, a second component and a third component; wherein the first component includes 3,3,3-trifluoropropyne, the second component includes dimethyl ether, the third component includes at least one of propylene and cyclopropane, and the sum of the mass percentages of the components is 100%.

2. A mixed refrigerant according to claim 1, characterized in that: The first component is 3,3,3-trifluoropropyne, the second component is dimethyl ether, and the third component is propylene.

3. A mixed refrigerant according to claim 2, characterized in that: In terms of mass percentage, the mixed refrigerant consists of 1% to 48% by weight of 3,3,3-trifluoropropyne, 1% to 56% by weight of dimethyl ether and 4% to 92% by weight of propylene.

4. A mixed refrigerant according to claim 1, characterized in that: The first component is 3,3,3-trifluoropropyne, the second component is dimethyl ether, and the third component is cyclopropane.

5. A mixed refrigerant according to claim 4, characterized in that: In terms of mass percentage, the mixed refrigerant consists of 1% to 60% by weight of 3,3,3-trifluoropropyne, 4% to 44% by weight of dimethyl ether and 12% to 92% by weight of cyclopropane.

6. A mixed refrigerant according to claim 1, characterized in that: The first component is 3,3,3-trifluoropropyne, the second component is dimethyl ether, and the third component is propylene and cyclopropane.

7. A mixed refrigerant according to claim 6, characterized in that: In terms of mass percentage, the mixed refrigerant consists of 4%-32% by weight of the first component, 8%-72% by weight of the second component, 8%-72% by weight of propylene and 12%-76% by weight of cyclopropane.

8. A composition, characterized in that Contains a lubricant and the mixed refrigerant according to any one of claims 1 to 7.

9. The composition according to claim 8, characterized in that The lubricant includes one or more combinations of silicone oil, polyalkylbenzene (PAB), polyol ester (POE), polyalkylene glycol (PAG), polyalkylene glycol ester (PAG ester), polyvinyl ether (PVE), and poly(α-olefin).

10. A refrigeration system, characterized in that: The mixed refrigerant according to any one of claims 1 to 8 or the composition according to claim 8 or 9 flows through the refrigeration system.

11. A refrigeration device, characterized in that: The refrigeration equipment adopts the refrigeration system according to claim 10.

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