Refrigerant mixture and home appliance

Abstract

The application provides a refrigerant mixture and a household appliance, relates to the technical field of household appliances, and aims to solve the problem of low stability caused by large fluctuation of lubricating oil with temperature influence when working at ultra-low temperature. The refrigerant mixture is applied to a household appliance, and the household appliance comprises a circulating flow path. The refrigerant mixture comprises: a refrigerant arranged in the circulating flow path and serving as a circulating medium; and a lubricating oil arranged in the circulating flow path, wherein the viscosity index of the lubricating oil is greater than or equal to 120, and the solubility of the refrigerant in the lubricating oil is less than or equal to 60 wt% in a temperature range of-40 DEG C to 100 DEG C. The viscosity index of the lubricating oil in the refrigerant mixture is greater than or equal to 120, which indicates that the viscosity of the lubricating oil is less affected by temperature change, so that the lubricating oil can maintain good lubricating performance in an environment with large temperature change.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, in particular to a refrigerant mixture and a household appliance. BACKGROUND

[0002] In recent years, air conditioners, heat pumps and other products applied in low-temperature fields are more and more widely used, and the heating operation range of related products has been as low as-25℃. For products facing extremely cold regions, the operation range can even be as low as-30℃ and below. The application in low-temperature fields has put forward new challenges to the reliability of compressors.

[0003] In the current related technology, system control and structure adjustment are usually used to ensure low-temperature application, but there are still some defects when facing ultra-low temperature application. How to improve the reliability of ultra-low temperature heating application is a problem to be solved by personnel in this technical field.

[0004] The viscosity index is used to represent the influence of the viscosity of lubricating oil on temperature. The viscosity index of conventional lubricating oil is small, and the influence of temperature fluctuation is large. The viscosity fluctuation is large at ultra-low temperature, so that the stability is not good when working at low temperature. In addition, at low temperature, the solubility of refrigerant in lubricating oil is also affected, which affects the lubricating performance of the compressor. SUMMARY

[0005] The present application aims to at least solve the problem of large fluctuation of lubricating oil with temperature influence at ultra-low temperature, resulting in low stability.

[0006] To this end, the first aspect of the present application provides a refrigerant mixture.

[0007] The second aspect of the present application provides a household appliance.

[0008] The refrigerant mixture provided by the present application is applied to a household appliance, the household appliance comprising a circulation flow path, and the refrigerant mixture comprising: a refrigerant arranged in the circulation flow path as a circulating medium; and a lubricating oil arranged in the circulation flow path, the viscosity index of the lubricating oil being greater than or equal to 120, and the solubility of the refrigerant in the lubricating oil being less than or equal to 60wt% in a temperature range of-40℃ to 100℃.

[0009] The viscosity index of the refrigerant mixture and the lubricating oil is greater than or equal to 120, which indicates that the viscosity of the lubricating oil is less affected by temperature changes, so that the lubricating oil can maintain good lubricating performance in an environment with large temperature changes. The viscosity index of conventional lubricating oil is less than 110, which is greatly affected by temperature. In addition, the solubility of the refrigerant in the lubricating oil is less than or equal to 60wt% in the range of -40℃ to 100℃, that is, the mass percentage of the refrigerant to the lubricating oil is less than or equal to 60% after the refrigerant is saturated, and because the solubility is less than or equal to 60wt%, the lubricating oil and the refrigerant are easy to separate, which helps to improve the heat exchange efficiency of the system. In addition, even at ultra-low temperature -40℃, a relatively low solubility can be ensured, while for common lubricating oil, the solubility of the refrigerant in the lubricating oil gradually increases as the temperature decreases, and at low temperature, the solubility is even greater than or equal to 80%, thereby affecting the lubricating performance of the compressor.

[0010] Generally, to determine the influence of temperature change on the viscosity of lubricating oil, the viscosity of the lubricating oil at 40℃ and the viscosity of the lubricating oil at 100℃ are usually observed. The lubricating oil of the present application has a high viscosity index, the viscosity at 40℃ is less than or equal to 60mm 2 / s, and the viscosity at 100℃ is greater than or equal to 8mm 2 / s.

[0011] In some technical solutions, the solubility of the refrigerant in the lubricating oil is less than or equal to 60wt% in the temperature range of -40℃ to -20℃.

[0012] In some technical solutions, the solubility of the refrigerant in the lubricating oil is less than or equal to 60wt% in the temperature range of -40℃ to 0℃.

[0013] In some technical solutions, the solubility of the refrigerant in the lubricating oil is less than or equal to 50wt% in the temperature range of -40℃ to 100℃.

[0014] In these technical solutions, the solubility of the refrigerant in the lubricating oil is less than or equal to 60wt% in the temperature range of -40℃ to 0℃, and further, the solubility of the refrigerant in the lubricating oil is less than or equal to 50wt% in the temperature range of -40℃ to 100℃, that is, the refrigerant mixture of the present application also has a relatively low saturation solubility at ultra-low temperature, thereby ensuring the stability of the lubricating oil.

[0015] In some technical solutions, the viscosity index of the lubricating oil is greater than or equal to 150.

[0016] In the technical solutions, the viscosity index of the lubricating oil is greater than or equal to 150, so that the stability of the lubricating oil is further improved, the lubricating performance is improved, and the refrigerant mixture of the application is particularly suitable for low-temperature work and has good stability at ultra-low temperature. Alternatively, the viscosity index of the lubricating oil is greater than or equal to 170.

[0017] In some technical solutions, the lubricating oil comprises: a base oil: a dipentaerythritol ester, wherein the dipentaerythritol ester is obtained by reacting dipentaerythritol with an acid, and the number of carbon atoms of the acid is 9 to 14.

[0018] In the technical solutions, the lubricating oil comprises a base oil and a dipentaerythritol ester, wherein the dipentaerythritol ester is obtained by reacting dipentaerythritol with an acid, and the number of carbon atoms of the acid is 9 to 14. The dipentaerythritol ester obtained by reacting the acid with a plurality of carbon atoms and dipentaerythritol has better viscosity characteristics, and the ester compound formed by the longer chain fatty acid can maintain the stable viscosity of the lubricating oil within a wider temperature range, which helps to improve the viscosity index of the lubricating oil and make it perform well at extremely high or low temperatures. In addition, the longer chain ester compound often has good oxidation stability, which means that it is not easy to decompose or oxidize at high temperatures, thereby prolonging the service life of the lubricating oil. After the dipentaerythritol ester is used as an additive of the lubricating oil, the viscosity index of the lubricating oil can be greatly improved, and it is particularly suitable for HFC (Hydrofluorocarbons) refrigerant, HCFC (Hydrochlorofluorocarbons) refrigerant and HFO (Hydrofluoroolefins) refrigerant, so that the refrigerant has a lower saturated solubility, thereby improving the stability of the refrigerant mixture. If the number of carbon atoms of the fatty acid is small, the viscosity index of the lubricating oil will be greatly reduced. Of course, although the long-chain ester performs better at high temperatures, it also makes the flowability relatively poor at low temperatures. Therefore, the number of carbon atoms is preferably 9 to 14, such as 10, 12, etc.

[0019] In some technical solutions, the acid with 9 to 14 carbon atoms can be nonanoic acid, decenoic acid, octanoic acid, undecanoic acid, lauric acid or myristic acid, etc.

[0020] In some technical solutions, the mass ratio of the base oil to the lubricating oil is greater than or equal to 99%, and the mass ratio of the dipentaerythritol ester to the lubricating oil is less than or equal to 1%.

[0021] In the technical solution, the content of dipentaerythritol ester should not be too high, otherwise it will affect the low-temperature stability of the lubricating oil. Therefore, the content of dipentaerythritol ester in the lubricating oil is preferably less than or equal to 1%, for example, 0.5% and 0.8%.

[0022] In some technical solutions, the lubricating oil further comprises one or a combination of the following: an antioxidant, a rust inhibitor, a defoamer, a dyeing agent, a drying agent, a friction modifier.

[0023] In the technical solution, the antioxidant is a chemical substance used to prevent or delay the oxidation of the refrigerant and the lubricating oil. Oxidation can cause the formation of sludge and deposits, which can affect the efficiency and service life of the system. The rust inhibitor is used to prevent rust or corrosion of metal parts in the system, protecting the system from corrosive damage. The defoamer is used to reduce the formation of foam in the lubricating oil, which can affect the performance and lubrication effect of the lubricating oil. The dyeing agent is used to mark the refrigerant, making it easier to detect leaks. Some refrigerants are colorless by themselves, and the addition of a dyeing agent can make it easier for technicians to find the leak point. The drying agent is used to remove moisture from the system, and the presence of moisture can cause ice blockage and other problems, affecting system performance. The friction modifier can reduce the friction between metal surfaces and improve the lubrication effect.

[0024] In some technical solutions, the pour point of the lubricating oil is less than or equal to -45℃.

[0025] In the technical solution, the pour point of the lubricating oil is less than or equal to -45℃, i.e. the minimum temperature at which the lubricating oil begins to flow is less than or equal to -45℃, which can ensure that the lubricating oil has good flowability even at ultra-low temperatures. Optionally, the pour point of the lubricating oil is less than or equal to -50℃. For example, -50℃.

[0026] In some technical solutions, the mass ratio of refrigerant to lubricating oil is 1:9, and the viscosity of the refrigerant mixture at -30℃ is less than or equal to 600mm 2 / s.

[0027] In the technical solution, under ultra-low temperature conditions, the lower viscosity makes the lubricating oil flow more easily, which is beneficial to quickly lubricate various components and can reduce the friction loss between mechanical components, improving the energy efficiency of the system. Optionally, the mass ratio of refrigerant to lubricating oil is 1:9, and the viscosity of the refrigerant mixture at -30℃ is less than or equal to 500mm 2 / s, for example, 400mm 2 / s, 450mm 2 / s.

[0028] In some embodiments, the maximum solubility of the refrigerant in the lubricating oil is X1 and the minimum solubility of the refrigerant in the lubricating oil is X2 at a temperature range of -40°C to 100°C, and (X1-X2) / X1≤40%. That is, the change of the solubility of the refrigerant in the lubricating oil is ≤40% at a temperature range of -40°C to 100°C, which indicates that the solubility of the refrigerant in the lubricating oil is not greatly affected by the temperature, thereby indirectly indicating the stability of the lubricating oil. Optionally, the change of the solubility of the refrigerant in the lubricating oil is ≤35%, such as 35% or 30%, etc.

[0029] In some embodiments, the refrigerant comprises one or a combination of the following: an HFC refrigerant, an HCFC refrigerant, and an HFO refrigerant.

[0030] In this embodiment, the HFC refrigerant, the HCFC refrigerant, and the HFO refrigerant all have good adaptability with the lubricating oil of the present application. Of course, it is not limited to using dipentaerythritol ester as the viscosity index modifier of the lubricating oil, and other additives can also be used to ensure the ultra-low temperature stability of the lubricating oil, so that the refrigerant can also be selected as an HC (Hydrocarbons) refrigerant.

[0031] The second aspect of the present application provides a household appliance, comprising: a circulation flow path; and the refrigerant mixture provided by any one of the first aspect of the present application in the circulation flow path. Since the household appliance provided by the present application comprises a circulation flow path and the refrigerant mixture provided by any one of the first aspect of the present application in the circulation flow path, the household appliance has all the beneficial effects of the refrigerant mixture.

[0032] In some embodiments, the household appliance comprises one of the following: an air conditioner, a heat pump, and a heating device.

[0033] Additional aspects and advantages of the present application will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0034] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0035] Figure 1 FIG. 1 shows a structural schematic diagram of a household appliance according to an embodiment of the present application.

[0036] wherein, Figure 1 The correspondence between the reference signs and the component names in the accompanying drawings is as follows:

[0037] 1 household appliance, 12 compressor, 14 condenser, 16 expansion valve, 18 evaporator, 19 circulation flow path. Detailed Implementation

[0038] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0039] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0040] like Figure 1 As shown, the refrigerant mixture provided in this embodiment is applied to a household appliance 1. The household appliance 1 includes a circulation path 19. The refrigerant mixture includes: a refrigerant disposed in the circulation path 19 as a circulation medium; and a lubricating oil disposed in the circulation path 19. The viscosity index of the lubricating oil is greater than or equal to 120, and the solubility of the refrigerant in the lubricating oil is less than or equal to 60 wt% in the temperature range of -40℃ to 100℃.

[0041] The refrigerant mixture provided in this embodiment has a lubricating oil viscosity index greater than or equal to 120, indicating that the viscosity of the lubricating oil is less affected by temperature changes. This allows the lubricating oil to maintain good lubrication performance even in environments with large temperature variations. Conventional lubricating oils typically have a viscosity index less than 110 and are significantly affected by temperature. Furthermore, within the temperature range of -40℃ to 100℃, the solubility of the refrigerant in the lubricating oil is less than or equal to 60 wt%. This means that after the refrigerant is saturated, the mass percentage of the refrigerant to the lubricating oil is less than or equal to 60%. Because the solubility is less than or equal to 60 wt%, the lubricating oil and refrigerant are easily separated, which helps improve the system's heat exchange efficiency. Moreover, even at ultra-low temperatures of -40℃, a low solubility is maintained. In contrast, with common lubricating oils, the solubility of the refrigerant gradually increases as the temperature decreases, reaching even greater than or equal to 80% at low temperatures, thus affecting the lubrication performance of the compressor 12.

[0042] Normally, to determine the effect of temperature changes on lubricating oil viscosity, one would typically look at the viscosity of the lubricating oil at 40°C and at 100°C. The lubricating oil of this invention has a high viscosity index, with a viscosity of ≤60 mg / L at 40°C. 2 / s, viscosity at 100℃ ≥8mm 2 / s.

[0043] In addition, it is noted that if the lubricating oil is used as the solvent and the refrigerant is used as the solute, the refrigerant is added to the lubricating oil, and the solubility of the refrigerant in the lubricating oil is less than or equal to 60 wt%. If the refrigerant reaches saturation, and the addition of the refrigerant continues, the refrigerant will no longer be a solvent, but as the addition of the refrigerant continues, when the refrigerant is in excess, the refrigerant at this time is equivalent to becoming a solvent, and the lubricating oil becomes a solute, which is equivalent to the lubricating oil being dissolved in the refrigerant, and the mass percentage of the mass of the refrigerant to the mass of the lubricating oil at this time is greater than or equal to 75 wt%.

[0044] In some embodiments, optionally, the solubility of the refrigerant in the lubricating oil is less than or equal to 60 wt% in a temperature range of -40°C to -20°C.

[0045] In some embodiments, optionally, the solubility of the refrigerant in the lubricating oil is less than or equal to 60 wt% in a temperature range of -40°C to 0°C.

[0046] In some embodiments, optionally, the solubility of the refrigerant in the lubricating oil is less than or equal to 50 wt% in a temperature range of -40°C to 100°C. For example, the solubility is equal to 50 wt% or 45 wt%.

[0047] In these embodiments, the solubility of the refrigerant in the lubricating oil is less than or equal to 60 wt% in a temperature range of -40°C to 0°C, and further, the solubility of the refrigerant in the lubricating oil is less than or equal to 50 wt% in a temperature range of -40°C to 100°C, that is, the refrigerant mixture of the present application also has a low saturated solubility in the case of ultra-low temperature, thereby ensuring the stability of the lubricating oil.

[0048] In some embodiments, optionally, the viscosity index of the lubricating oil is greater than or equal to 150.

[0049] In these embodiments, the viscosity index of the lubricating oil is greater than or equal to 150, which can further improve the stability of the lubricating oil and improve the lubricating performance, so that the refrigerant mixture of the present application is particularly suitable for low-temperature work and has good stability in ultra-low temperature. For example, the viscosity index of the lubricating oil is equal to 150, 160, or 170.

[0050] In some embodiments, optionally, the lubricating oil comprises: a base oil: a dipentaerythritol ester, wherein the dipentaerythritol ester is obtained by reacting dipentaerythritol with an acid, and the number of carbon atoms of the acid is 9 to 14.

[0051] In the embodiments, the lubricating oil comprises base oil and dipentaerythritol ester, wherein the dipentaerythritol ester is obtained by reacting dipentaerythritol with an acid with 9 to 14 carbon atoms. The dipentaerythritol ester obtained by reacting the acid with a plurality of carbon atoms with dipentaerythritol has better viscosity characteristics, and the ester compound formed by the longer chain fatty acid can maintain the stable viscosity of the lubricating oil in a wider temperature range, which helps to improve the viscosity index of the lubricating oil and make it perform well under extremely high or extremely low temperature conditions. In addition, the longer chain ester compound often has better oxidation stability, which means that it is not easy to decompose or oxidize at high temperatures, thereby prolonging the service life of the lubricating oil. The use of dipentaerythritol ester as an additive for lubricating oil can significantly improve the viscosity index of the lubricating oil, especially for HFC refrigerants, HCFC refrigerants and HFO refrigerants, so that these refrigerants have lower saturated solubility, thereby improving the stability of the refrigerant mixture. If the number of carbon atoms of the fatty acid is small, the viscosity index of the lubricating oil will be greatly reduced. Of course, although long-chain esters perform better at high temperatures, they also make the flowability relatively poor at low temperatures, so the number of carbon atoms is preferably 9 to 14, such as 10, 12, etc.

[0052] In some embodiments, the acid with 9 to 14 carbon atoms can be selected from nonanoic acid, decenoic acid, octanoic acid, undecanoic acid, lauric acid, or myristic acid, etc.

[0053] In some embodiments, the base oil can be mineral oil, synthetic oil, vegetable oil, ester oil, etc., such as poly-alpha-olefin, dipentaerythritol ester, and fluorine oil, etc.

[0054] In some embodiments, the mass ratio of the base oil to the lubricating oil is greater than or equal to 99%, and the mass ratio of the dipentaerythritol ester to the lubricating oil is less than or equal to 1%.

[0055] In this embodiment, the content of dipentaerythritol ester should not be too high, otherwise it will affect the low-temperature stability of the lubricating oil. Therefore, it is preferable to set the mass ratio of the content of dipentaerythritol ester to the lubricating oil to be less than or equal to 1%, for example, 0.5% and 0.8%.

[0056] In some embodiments, the lubricating oil further comprises one or a combination of the following: antioxidants, rust inhibitors, antifoaming agents, coloring agents, drying agents, friction modifiers.

[0057] In this embodiment, the antioxidant is a chemical substance used to prevent or slow down the oxidation of the refrigerant and lubricating oil. Oxidation can lead to the formation of sludge and deposits, which in turn affect the efficiency and life of the system. The rust inhibitor is used to prevent the rusting or corrosion of metal parts in the system, protecting the system from corrosive damage. The defoaming agent is used to reduce the formation of foam in the lubricating oil, which can affect the performance and lubrication effect of the lubricating oil. The dyeing agent is used to mark the refrigerant, which is convenient for detecting leakage. Some refrigerants are colorless by themselves, and the addition of a dyeing agent can make it easier for technicians to find the leakage point. The desiccant is used to remove moisture from the system, and the presence of moisture can cause problems such as ice blockage, affecting the performance of the system. The friction modifier can reduce the friction between metal surfaces and improve the lubrication effect.

[0058] In some embodiments, optionally, when the lubricating oil includes an antioxidant, the mass ratio of the antioxidant to the lubricating oil is less than or equal to 0.1%. When the lubricating oil includes a rust inhibitor, the mass ratio of the rust inhibitor to the lubricating oil is less than or equal to 0.1%. When the lubricating oil includes a defoaming agent, the mass ratio of the defoaming agent to the lubricating oil is less than or equal to 0.1%. When the lubricating oil includes a dyeing agent, the mass ratio of the dyeing agent to the lubricating oil is less than or equal to 0.1%. When the lubricating oil includes a desiccant, the mass ratio of the desiccant to the lubricating oil is less than or equal to 0.1%. When the lubricating oil includes a friction modifier, the mass ratio of the friction modifier to the lubricating oil is less than or equal to 0.1%.

[0059] In some embodiments, optionally, the pour point of the lubricating oil is less than or equal to -45°C.

[0060] In this embodiment, the pour point of the lubricating oil is less than or equal to -45°C, i.e. the minimum temperature at which the lubricating oil begins to flow is less than or equal to -45°C, so that the lubricating oil has good flowability even at ultra-low temperature. Optionally, the pour point of the lubricating oil is less than or equal to -50°C. For example, -50°C.

[0061] In some embodiments, optionally, the mass ratio of the refrigerant to the lubricating oil is 1:9, and the viscosity of the refrigerant mixture at -30°C is less than or equal to 600mm 2 / s.

[0062] In this embodiment, under ultra-low temperature conditions, the lower viscosity makes the lubricating oil flow more easily, which is conducive to rapid lubrication of various components, can reduce the friction loss between mechanical components, and improve the energy efficiency of the system. Optionally, the mass ratio of the refrigerant to the lubricating oil is 1:9, and the viscosity of the refrigerant mixture at -30°C is less than or equal to 500mm 2 / s, for example 400mm 2 / s, 450mm 2 / s.

[0063] In some embodiments, optionally, the maximum solubility of the refrigerant in the lubricating oil is X1 and the minimum solubility of the refrigerant in the lubricating oil is X2 at a temperature range of -40°C to 100°C, and (X1-X2) / X1≤40%. That is, the change of the solubility of the refrigerant in the lubricating oil is ≤40% at a temperature range of -40°C to 100°C, which means that the solubility of the refrigerant in the lubricating oil is not greatly affected by the temperature, thereby indirectly indicating the stability of the lubricating oil of the present application. Optionally, (X1-X2) / X1≤35%, such as 35% or 30%, etc.

[0064] In some embodiments, optionally, the refrigerant comprises one or a combination of the following: an HFC refrigerant, an HCFC refrigerant, and an HFO refrigerant.

[0065] In this embodiment, the HFC refrigerant, the HCFC refrigerant, and the HFO refrigerant all have good adaptability with the lubricating oil of the present application. Of course, it is not limited to using dipentaerythritol ester as the viscosity index modifier of the lubricating oil, and other additives can also be used to ensure the ultra-low temperature stability of the lubricating oil, so that the refrigerant can also be selected as an HC refrigerant.

[0066] As shown in Figure 1 The second aspect of the present application provides a household appliance 1, comprising: a circulating flow path 19; and the refrigerant mixture provided by any one of the embodiments of the first aspect of the present application arranged in the circulating flow path 19. Since the household appliance 1 provided by the present application comprises the circulating flow path 19 and the refrigerant mixture provided by any one of the embodiments of the first aspect of the present application arranged in the circulating flow path 19, the household appliance 1 has all the beneficial effects of the refrigerant mixture.

[0067] In some embodiments, optionally, the household appliance 1 comprises one of the following: an air conditioner, a heat pump, and a heating device.

[0068] The home appliance 1 further comprises a compressor 12, a condenser 14, an expansion valve 16 and an evaporator 18. The compressor 12 is the heart of the heating cycle, which compresses the low-temperature and low-pressure gaseous refrigerant from the evaporator 18 into high-temperature and high-pressure gas. The outlet of the compressor 12 is connected to the inlet of the condenser 14. The condenser 14 receives the high-temperature and high-pressure gaseous refrigerant from the compressor 12, and in the condenser 14, the refrigerant is cooled and condensed into liquid by heat dissipation to the external environment (usually air or water). The outlet of the condenser 14 is connected to the inlet of the expansion valve 16. The expansion valve 16 functions to reduce the pressure of the high-temperature and high-pressure liquid refrigerant from the condenser 14 into low-temperature and low-pressure liquid refrigerant. The outlet of the expansion valve 16 is connected to the inlet of the evaporator 18. The evaporator 18 receives the low-temperature and low-pressure liquid refrigerant from the expansion valve 16, and in the evaporator 18, the refrigerant absorbs heat from the surrounding environment (such as indoor air) to evaporate into gas. The outlet of the evaporator 18 is connected back to the inlet of the compressor 12, completing a complete heating or cooling cycle.

[0069] In the present application, the term "a plurality of" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connected", "connecting", "fixed", and the like should be interpreted broadly, for example, "connected" can be fixed connection, or detachable connection, or integrally connected; "connected" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0070] In the description of the present application, the terms "one embodiment", "some embodiments", "a specific embodiment", and the like, mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0071] The above is only the preferred embodiment of the present application, and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A refrigerant mixture, characterized by, The application is applied to a household appliance, the household appliance comprises a circulating flow path, the refrigerant mixture comprises: a refrigerant, which is arranged in the circulating flow path as a circulating medium; a lubricating oil, which is arranged in the circulating flow path, the viscosity index of the lubricating oil is greater than or equal to 120, and the solubility of the refrigerant in the lubricating oil is less than or equal to 60 wt% in a temperature range of -40 ℃ to 100 ℃; the lubricating oil is composed of a base oil and a dipentaerythritol ester, wherein the dipentaerythritol ester is obtained by reacting dipentaerythritol with an acid, and the number of carbon atoms of the acid is 9 to 14; the mass ratio of the base oil to the lubricating oil is greater than or equal to 99%, and the mass ratio of the dipentaerythritol ester to the lubricating oil is less than or equal to 1%; the mass ratio of the refrigerant to the lubricating oil is 1:9; the refrigerant comprises one or a combination of the following: an HFC refrigerant, an HCFC refrigerant, and an HFO refrigerant.

2. The refrigerant mixture of claim 1, wherein: the solubility of the refrigerant in the lubricating oil is less than or equal to 60 wt% in a temperature range of -40 ℃ to -20 ℃.

3. The refrigerant mixture of claim 1, wherein: the solubility of the refrigerant in the lubricating oil is less than or equal to 60 wt% in a temperature range of -40 ℃ to 0 ℃.

4. The refrigerant mixture of claim 1, wherein: the solubility of the refrigerant in the lubricating oil is less than or equal to 50 wt% in a temperature range of -40 ℃ to 100 ℃.

5. The refrigerant mixture of claim 1, wherein: the viscosity index of the lubricating oil is greater than or equal to 150.

6. The refrigerant mixture of claim 1, wherein the pour point of the lubricating oil is less than or equal to -45 ℃.

7. The refrigerant mixture of claim 1, wherein The refrigerant mixture has a viscosity of 600 mm 2 / s or less at -30°C.

8. The refrigerant mixture of claim 1, wherein, in a temperature range of -40 ℃ to 100 ℃, the maximum solubility of the refrigerant in the lubricating oil is X1, and the minimum solubility is X2, (X1-X2) / X1≤40%.

9. An electric home appliance characterized by comprising: comprise: a circulating flow path; the refrigerant mixture of any one of claims 1 to 8 arranged in the circulating flow path.

10. The home appliance of claim 9, wherein the household appliance comprises one of the following: an air conditioner, a heat pump, and a heating device.

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