Mixed refrigerant and air conditioning system

Abstract

The present invention provides a mixed refrigerant and an air-conditioning system, wherein the mixed refrigerant is composed of a first component and a second component, wherein the first component is 3,3,3-trifluoropropyne, and the second component is one or both of difluoromethane and 2,3,3,3-tetrafluoropropylene. The mixed refrigerant of the present invention can reduce greenhouse gas emissions while ensuring safety and system performance, effectively solving the problem of high global warming potential (GWP) of other refrigerants, while also solving the problem of poor thermal performance of other refrigerants. While reducing GWP, it also increases relative volumetric cooling capacity, improving cooling / heating performance (i.e., improving thermal performance).

Description

Technical Field

[0001] The present invention belongs to the technical field of refrigeration, and in particular relates to a mixed refrigerant and an air-conditioning system. Background Art

[0002] Since the invention of the first steam compressor in 1830, refrigerants have undergone four generations of technological development. The first generation of refrigerants was selected based on their ability to work properly, and mainly included readily available substances such as ammonia, carbon dioxide, sulfur dioxide, and diethyl ether. The second generation of refrigerants was selected based on safety and stability, and mainly included synthetic chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs). The third generation of refrigerants was selected based on their ozone-safety, and mainly included hydrofluorocarbons (HFCs). With global warming, the fourth generation of refrigerants was selected based on zero ozone depletion potential (ODP) and low greenhouse effect potential (GWP), and mainly included hydrofluoroolefins (HFOs) and natural refrigerants. However, there is still no perfect refrigerant that can meet the requirements of environmental protection, safety, and performance at the same time. R290 is flammable and explosive, with a flammability rating of Category 3. Refrigerants like R1234yf and R1234ze(E) have high atmospheric boiling points. While blends can mitigate these deficiencies to some extent through complementary advantages, there are currently no widely used mixed refrigerants. For example, R454B still has a high GWP, while R454C has a large temperature glide and low pressure. Due to its superior performance and extremely low GWP, R290 is considered a highly promising alternative refrigerant, leading to extensive research into its flammability.

[0003] Looking at the development history of refrigerants, the fourth-generation refrigerants reduce GWP by constructing carbon-carbon double bonds. However, in order to reduce flammability, the number of fluorine atoms must be increased and the number of hydrogen atoms must be reduced. In order to ensure better cooling and heating performance, the boiling point at normal pressure should be below -40°C.

[0004] Since the refrigerants in the prior art cannot simultaneously ensure low GWP values and high thermal performance (including COP and volumetric cooling capacity, etc.), the present invention studies and designs a mixed refrigerant and air-conditioning system. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the refrigerants in the prior art cannot simultaneously ensure low GWP value and high thermal performance, thereby providing a mixed refrigerant and air-conditioning system.

[0006] The present invention provides a mixed refrigerant, wherein:

[0007] The invention consists of a first component and a second component, wherein the first component is 3,3,3-trifluoropropyne, and the second component is one or two of difluoromethane and 2,3,3,3-tetrafluoropropylene.

[0008] In some embodiments,

[0009] When the first component is 3,3,3-trifluoropropyne and the second component is difluoromethane, the mass ratio of 3,3,3-trifluoropropyne to the mixed refrigerant is 79-99%, and the mass ratio of difluoromethane to the mixed refrigerant is 1-21%.

[0010] In some embodiments,

[0011] When the first component is 3,3,3-trifluoropropyne and the second component is 2,3,3,3-tetrafluoropropene, the mass ratio of 3,3,3-trifluoropropyne to the mixed refrigerant is 40-99%, and the mass ratio of 2,3,3,3-tetrafluoropropene to the mixed refrigerant is 1-60%.

[0012] In some embodiments,

[0013] When the first component is 3,3,3-trifluoropropyne and the second component is difluoromethane and 2,3,3,3-tetrafluoropropylene, in terms of mass percentage, the mass ratio of difluoromethane to the mixed refrigerant is 40-98%, the mass ratio of 3,3,3-trifluoropropyne to the mixed refrigerant is 1-21%, and the mass ratio of 2,3,3,3-tetrafluoropropylene to the mixed refrigerant is 1-39%.

[0014] In some embodiments,

[0015] The mass ratio of the 3,3,3-trifluoropropyne to the difluoromethane is 0.80:0.20; or

[0016] The mass ratio of the 3,3,3-trifluoropropyne to the difluoromethane is 0.84:0.16.

[0017] In some embodiments,

[0018] The mass ratio of the 3,3,3-trifluoropropyne to the 2,3,3,3-tetrafluoropropene is 0.52:0.48; or

[0019] The mass ratio of the 3,3,3-trifluoropropyne to the 2,3,3,3-tetrafluoropropene is 0.64:0.36; or

[0020] The mass ratio of the 3,3,3-trifluoropropyne to the 2,3,3,3-tetrafluoropropylene is 0.76:0.24.

[0021] In some embodiments,

[0022] The mass ratio of the 3,3,3-trifluoropropyne, the difluoromethane and the 2,3,3,3-tetrafluoropropene is 0.60:0.04:0.36; or

[0023] The mass ratio of the 3,3,3-trifluoropropyne, the difluoromethane and the 2,3,3,3-tetrafluoropropene is 0.60:0.20:0.20; or

[0024] The mass ratio of the 3,3,3-trifluoropropyne, the difluoromethane and the 2,3,3,3-tetrafluoropropene is 0.68:0.04:0.28; or

[0025] The mass ratio of the 3,3,3-trifluoropropyne, the difluoromethane and the 2,3,3,3-tetrafluoropropylene is 0.68:0.20:0.12.

[0026] In some embodiments,

[0027] The mass ratio of the 3,3,3-trifluoropropyne, the difluoromethane and the 2,3,3,3-tetrafluoropropene is 0.76:0.04:0.20; or

[0028] The mass ratio of the 3,3,3-trifluoropropyne, the difluoromethane and the 2,3,3,3-tetrafluoropropylene is 0.76:0.20:0.04.

[0029] In some embodiments,

[0030] The mass ratio of the 3,3,3-trifluoropropyne, the difluoromethane and the 2,3,3,3-tetrafluoropropylene is 0.80:0.12:0.08.

[0031] The present invention also provides an air-conditioning system, comprising the mixed refrigerant described in any of the preceding items.

[0032] The mixed refrigerant and air conditioning system provided by the present invention has the following beneficial effects:

[0033] The present invention provides a binary or ternary environmentally friendly mixed refrigerant and an air conditioning system using the environmentally friendly mixed refrigerant, namely, a first component and a second component physically mixed according to their corresponding mass ratios (wherein the first component is 3,3,3-trifluoropropyne (TFP) and the second component is at least one of difluoromethane (R32) and 2,3,3,3-tetrafluoropropylene (R1234yf)). This effectively provides an environmentally friendly, safe, and efficient refrigerant. The refrigerant has a global warming potential (GWP) of less than 150, exhibiting significant environmental advantages. Its flammability rating can reach 2L, and it can be used in household, automotive, and commercial applications. Its atmospheric boiling point can be as low as -40°C or below, and it exhibits excellent cooling and heating performance. The use of this refrigerant can reduce greenhouse gas emissions while ensuring safety and system performance, effectively addressing the high GWP and poor thermal performance of other refrigerants. While reducing the GWP, it also increases the relative volumetric cooling capacity and improves cooling / heating performance (i.e., improves thermal performance). DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts are within the scope of protection of the present invention.

[0035] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments of the present application. As used herein, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0036] Unless otherwise specified, the relative arrangement of components and steps, numerical expressions, and numerical values described in these embodiments do not limit the scope of the present invention. Technologies, methods, and devices known to those skilled in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values. In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right," "lateral, vertical, vertical, horizontal," and "top, bottom," etc., are merely for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention; the directional words "inside" and "outside" refer to the inside and outside relative to the outline of the component itself.

[0037] For ease of description, spatially relative terms such as "on," "above," "on the upper surface of," and "upper" may be used herein to describe the spatial positional relationship of one device or feature to other devices or features. The exemplary term "above" may include both "above" and "below." The device may be oriented in other different ways (rotated 90 degrees or at other orientations), and the spatially relative terms used herein should be interpreted accordingly.

[0038] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0039] The present invention provides a mixed refrigerant, wherein:

[0040] It consists of a first component and a second component, wherein: the first component is 3,3,3-trifluoropropyne (TFP), and the second component is one or two of difluoromethane (R32) and 2,3,3,3-tetrafluoropropylene (R1234yf).

[0041] The present invention provides a binary or ternary environmentally friendly mixed refrigerant and an air conditioning system using the environmentally friendly mixed refrigerant, namely, a first component and a second component physically mixed according to their corresponding mass ratios (wherein the first component is 3,3,3-trifluoropropyne (TFP) and the second component is at least one of difluoromethane (R32) and 2,3,3,3-tetrafluoropropylene (R1234yf)). This effectively provides an environmentally friendly, safe, and efficient refrigerant. The refrigerant has a global warming potential (GWP) of less than 150, exhibiting significant environmental advantages. Its flammability rating can reach 2L, and it can be used in household, automotive, and commercial applications. Its atmospheric boiling point can be as low as -40°C or below, and it exhibits excellent cooling and heating performance. The use of this refrigerant can reduce greenhouse gas emissions while ensuring safety and system performance, effectively addressing the high GWP and poor thermal performance of other refrigerants. While reducing the GWP, it also increases the relative volumetric cooling capacity and improves cooling / heating performance (i.e., improves thermal performance).

[0042] The present invention provides an environmentally friendly refrigerant, whose main component is 3,3,3-trifluoropropyne (TFP). Its atmospheric boiling point is about -48°C, and it has good cooling and heating performance. The refrigerant has a global warming potential (GWP) of only 11. The fact that there are two more fluorine atoms than hydrogen atoms makes it have good flammability. Refrigerants such as R32 and R1234yf are planned to be added to further improve the flammability of 3,3,3-trifluoropropyne. While ensuring low GWP and good performance, the flammability level can reach Class 2L (GB / T 7778-2017 Refrigerant Numbering Method and Safety Classification), making it a good alternative to R290.

[0043] In some embodiments,

[0044] When the first component is 3,3,3-trifluoropropyne (TFP) and the second component is difluoromethane (R32), in terms of mass percentage, the mass ratio of 3,3,3-trifluoropropyne (TFP) to the mixed refrigerant is 79-99%, and the mass ratio of difluoromethane (R32) to the mixed refrigerant is 1-21%.

[0045] The present invention provides an environmentally friendly refrigerant with low GWP, excellent performance and good safety. In terms of mass percentage, the environmentally friendly mixed refrigerant includes 79-99% TFP and 1-21% R32. When the above two components meet the above mass ratio, the environmentally friendly mixed refrigerant has good thermodynamic performance (COP, volumetric cooling capacity) and low GWP, and the comprehensive performance of the two aspects is optimal. By adding one or both of R32 and R1234yf to 3,3,3-trifluoropropyne, the flammability of 3,3,3-trifluoropropyne is improved, and the flammability grade can reach Class 2L. By mixing 3,3,3-trifluoropropyne with R32 and R1234yf, the GWP value of R32 is reduced to less than 150. By mixing 3,3,3-trifluoropropyne with R32 and R1234yf, the atmospheric boiling point of R1234yf is reduced to below -40°C, and it has good cooling and heating performance.

[0046] This environmentally friendly mixed refrigerant has the following advantages:

[0047] (1) The global warming potential (GWP) value of the environmentally friendly mixed refrigerant is less than 150, and its environmental performance is excellent;

[0048] (2) Environmentally friendly mixed refrigerants have good safety performance and the safety level can reach A2L;

[0049] (3) The energy efficiency of the environmentally friendly mixed refrigerant is basically equivalent to or even better than that of R290 (as reflected by the Qv in the table below).

[0050] In some embodiments,

[0051] When the first component is 3,3,3-trifluoropropyne (TFP) and the second component is 2,3,3,3-tetrafluoropropylene (R1234yf), in terms of mass percentage, the mass ratio of 3,3,3-trifluoropropyne to the mixed refrigerant is 40-99%, and the mass ratio of 2,3,3,3-tetrafluoropropylene (R1234yf) to the mixed refrigerant is 1-60%.

[0052] The present invention provides an environmentally friendly refrigerant with low GWP, excellent performance, and good safety. The environmentally friendly mixed refrigerant comprises, by mass percentage, 40-99% TFP and 1-60% R1234yf. When the two components meet the aforementioned mass ratio, the environmentally friendly mixed refrigerant exhibits excellent thermodynamic performance (COP, volumetric cooling capacity) and a low GWP, achieving optimal overall performance in both aspects. Adding one or both of R32 and R1234yf to 3,3,3-trifluoropropyne improves the flammability of 3,3,3-trifluoropropyne, achieving a flammability rating of Class 2L. By mixing 3,3,3-trifluoropropyne with R32 and R1234yf, the GWP of R32 can be reduced to less than 150. By mixing 3,3,3-trifluoropropyne with R32 and R1234yf, the atmospheric boiling point of R1234yf is lowered to below -40°C, with good cooling and heating performance.

[0053] This environmentally friendly mixed refrigerant has the following advantages:

[0054] (1) The global warming potential (GWP) value of the environmentally friendly mixed refrigerant is less than 150, and its environmental performance is excellent;

[0055] (2) Environmentally friendly mixed refrigerants have good safety performance and the safety level can reach A2L;

[0056] (3) The energy efficiency of the environmentally friendly mixed refrigerant is basically equivalent to or even better than that of R290 (as reflected by the Qv in the table below).

[0057] In some embodiments,

[0058] When the first component is 3,3,3-trifluoropropyne (TFP) and the second component is difluoromethane (R32) and 2,3,3,3-tetrafluoropropylene (R1234yf), in terms of mass percentage, the mass ratio of difluoromethane (R32) to the mixed refrigerant is 40-98%, the mass ratio of 3,3,3-trifluoropropyne to the mixed refrigerant is 1-21%, and the mass ratio of 2,3,3,3-tetrafluoropropylene (R1234yf) to the mixed refrigerant is 1-39%.

[0059] The present invention provides an environmentally friendly refrigerant with low GWP, excellent performance, and good safety. The environmentally friendly mixed refrigerant comprises, by mass percentage, 40-98% TFP, 1-21% R32, and 1-39% R1234yf. When the two components meet the aforementioned mass ratios, the environmentally friendly mixed refrigerant exhibits good thermodynamic performance (COP, volumetric cooling capacity) and a low GWP, achieving optimal overall performance in both aspects. Adding one or both of R32 and R1234yf to 3,3,3-trifluoropropyne improves the flammability of 3,3,3-trifluoropropyne, achieving a flammability rating of Class 2L. By mixing 3,3,3-trifluoropropyne with R32 and R1234yf, the GWP of R32 can be reduced to less than 150. By mixing 3,3,3-trifluoropropyne with R32 and R1234yf, the atmospheric boiling point of R1234yf is lowered to below -40°C, with good cooling and heating performance.

[0060] This environmentally friendly mixed refrigerant has the following advantages:

[0061] (1) The global warming potential (GWP) value of the environmentally friendly mixed refrigerant is less than 150, and its environmental performance is excellent;

[0062] (2) Environmentally friendly mixed refrigerants have good safety performance and the safety level can reach A2L;

[0063] (3) The energy efficiency of the environmentally friendly mixed refrigerant is basically equivalent to or even better than that of R290 (as reflected by the Qv in the table below).

[0064] The present invention provides an environmentally friendly refrigerant, which is composed of TFP, R32 and R1234yf. The sum of the mass percentage concentrations of the components in the mixed refrigerant is 100%. The basic information of the components involved is as follows:

[0065] Table 1 Basic parameters of each component in the mixed working fluid

[0066] Component Chemical formula Boiling point at normal pressure / ℃ Flammability level GWP TFP CF3CCH -48 3 11 R32 CH2F2 -51.7 2L 677 R1234yf CHFCHCF3 -29.5 2L 1

[0067] The environmentally friendly refrigerant has a GWP of less than 150 and a flammability rating of up to Class 2L. The performance and energy efficiency of a unit using this refrigerant are comparable to or even better than those using R290 refrigerant. The preferred combination quality ratio is as follows:

[0068] Table 2 Preferred mixture mass ratio

[0069]

[0070] Example 1, in some embodiments,

[0071] The mass ratio of the 3,3,3-trifluoropropyne (TFP) to the difluoromethane (R32) is 0.80:0.20, that is, the two components of 3,3,3-trifluoropropyne (TFP) and the difluoromethane (R32) are physically mixed uniformly at a mass ratio of 0.80:0.20 to obtain an environmentally friendly mixed working fluid.

[0072] Example 2, in some embodiments,

[0073] The mass ratio of the 3,3,3-trifluoropropyne (TFP) to the difluoromethane (R32) is 0.84:0.16, that is, the two components of 3,3,3-trifluoropropyne (TFP) and the difluoromethane (R32) are physically mixed uniformly at a mass ratio of 0.84:0.16 to obtain an environmentally friendly mixed working fluid.

[0074] Example 3, in some embodiments,

[0075] The mass ratio of the 3,3,3-trifluoropropyne (TFP) to the 2,3,3,3-tetrafluoropropylene (R1234yf) is 0.52:0.48, that is, the two components of 3,3,3-trifluoropropyne (TFP) and the 2,3,3,3-tetrafluoropropylene (R1234yf) are physically mixed in a mass ratio of 0.52:0.48 to obtain an environmentally friendly mixed working fluid.

[0076] Example 4, in some embodiments,

[0077] The mass ratio of the 3,3,3-trifluoropropyne (TFP) to the 2,3,3,3-tetrafluoropropylene (R1234yf) is 0.64:0.36, that is, the two components of 3,3,3-trifluoropropyne (TFP) and the 2,3,3,3-tetrafluoropropylene (R1234yf) are physically mixed in a mass ratio of 0.64:0.36 to obtain an environmentally friendly mixed working fluid.

[0078] Example 5, in some embodiments,

[0079] The mass ratio of the 3,3,3-trifluoropropyne (TFP) to the 2,3,3,3-tetrafluoropropylene (R1234yf) is 0.76:0.24, that is, the two components of 3,3,3-trifluoropropyne (TFP) and the 2,3,3,3-tetrafluoropropylene (R1234yf) are physically mixed in a mass ratio of 0.76:0.24 to obtain an environmentally friendly mixed working fluid.

[0080] Example 6, in some embodiments,

[0081] The mass ratio of the 3,3,3-trifluoropropyne (TFP), the difluoromethane (R32) and the 2,3,3,3-tetrafluoropropylene (R1234yf) is 0.60:0.04:0.36, that is, the three components of 3,3,3-trifluoropropyne (TFP), the difluoromethane (R32) and the 2,3,3,3-tetrafluoropropylene (R1234yf) are physically mixed in a mass ratio of 0.60:0.04:0.36 to obtain an environmentally friendly mixed working fluid.

[0082] Example 7, in some embodiments,

[0083] The mass ratio of the 3,3,3-trifluoropropyne (TFP), the difluoromethane (R32) and the 2,3,3,3-tetrafluoropropylene (R1234yf) is 0.60:0.20:0.20, that is, the three components of 3,3,3-trifluoropropyne (TFP), the difluoromethane (R32) and the 2,3,3,3-tetrafluoropropylene (R1234yf) are physically mixed in a mass ratio of 0.60:0.20:0.20 to obtain an environmentally friendly mixed working fluid.

[0084] Example 8, in some embodiments,

[0085] The mass ratio of the 3,3,3-trifluoropropyne (TFP), the difluoromethane (R32) and the 2,3,3,3-tetrafluoropropylene (R1234yf) is 0.68:0.04:0.28, that is, the three components of 3,3,3-trifluoropropyne (TFP), the difluoromethane (R32) and the 2,3,3,3-tetrafluoropropylene (R1234yf) are physically mixed in a mass ratio of 0.68:0.04:0.28 to obtain an environmentally friendly mixed working fluid.

[0086] Example 9, in some embodiments,

[0087] The mass ratio of the 3,3,3-trifluoropropyne (TFP), the difluoromethane (R32) and the 2,3,3,3-tetrafluoropropylene (R1234yf) is 0.68:0.20:0.12, that is, the three components of 3,3,3-trifluoropropyne (TFP), the difluoromethane (R32) and the 2,3,3,3-tetrafluoropropylene (R1234yf) are physically mixed in a mass ratio of 0.68:0.20:0.12 to obtain an environmentally friendly mixed working fluid.

[0088] Example 10, in some embodiments,

[0089] The mass ratio of the 3,3,3-trifluoropropyne (TFP), the difluoromethane (R32) and the 2,3,3,3-tetrafluoropropylene (R1234yf) is 0.76:0.04:0.20, that is, the three components of 3,3,3-trifluoropropyne (TFP), the difluoromethane (R32) and the 2,3,3,3-tetrafluoropropylene (R1234yf) are physically mixed in a mass ratio of 0.76:0.04:0.20 to obtain an environmentally friendly mixed working fluid.

[0090] Example 11, in some embodiments,

[0091] The mass ratio of the 3,3,3-trifluoropropyne (TFP), the difluoromethane (R32) and the 2,3,3,3-tetrafluoropropylene (R1234yf) is 0.76:0.20:0.04, that is, the three components of 3,3,3-trifluoropropyne (TFP), the difluoromethane (R32) and the 2,3,3,3-tetrafluoropropylene (R1234yf) are physically mixed in a mass ratio of 0.76:0.20:0.04 to obtain an environmentally friendly mixed working fluid.

[0092] Example 12, in some embodiments,

[0093] The mass ratio of the 3,3,3-trifluoropropyne (TFP), the difluoromethane (R32) and the 2,3,3,3-tetrafluoropropylene (R1234yf) is 0.80:0.12:0.08, that is, the three components of 3,3,3-trifluoropropyne (TFP), the difluoromethane (R32) and the 2,3,3,3-tetrafluoropropylene (R1234yf) are physically mixed in a mass ratio of 0.80:0.12:0.08 to obtain an environmentally friendly mixed working fluid.

[0094] The environmentally friendly refrigerant of the present invention is used to replace R290. The selected design conditions are: the evaporator evaporation temperature is 10°C, the condenser condensation temperature 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 embodiment and R290 refrigerant in the refrigeration system were theoretically calculated respectively, and the GWP (calculated by linear addition of mass percentage), relative unit volume cooling / heating capacity Qv (ratio with unit volume cooling / heating capacity of R290), relative performance coefficient COP (ratio with performance coefficient of R290) and flammability grade were compared. The flammability grade is divided into 1 (no flame propagation), 2L (slightly flammable), 2 (flammable) and 3 (flammable) categories according to the GB / T7778-2017 refrigerant numbering method and safety classification. The results are shown in the following table:

[0095] Table 3 Comparison of performance indicators

[0096]

[0097] Both Qv and COP reflect cooling capacity, but a high-quality refrigerant must simultaneously possess a low GWP, high Qv, and high COP. The present invention achieves high Qv and COP while simultaneously reducing GWP. However, the comparative example exhibits a significantly lower volumetric cooling capacity due to the significant reduction in GWP, making it unsuitable for use as an alternative refrigerant in residential air conditioning.

[0098] As can be seen from the above table, the GWP of all refrigerant formulations of the present invention is less than 150, and their environmental performance is excellent; the relative volumetric cooling capacity of all refrigerant formulations is greater than 0.95, with the highest increase of 39% compared with R290, and the relative performance coefficient is greater than 0.9; the flammability level of all refrigerant formulations is A2L, which has significant advantages over R290.

[0099] As described above, the present invention can provide a safe, environmentally friendly and efficient alternative refrigerant with a GWP < 150, a safety level of A2L, and a volumetric cooling capacity increased by up to 39%, which can effectively replace R290.

[0100] The present invention also provides an air-conditioning system, which includes the aforementioned mixed refrigerant.

[0101] The present invention provides an environmentally friendly refrigerant with low GWP, excellent performance and good safety, and an air-conditioning system having the mixed refrigerant, which has the following beneficial effects:

[0102] 1. Adding one or both of R32 and R1234yf to 3,3,3-trifluoropropyne can improve the flammability of 3,3,3-trifluoropropyne and the flammability grade can reach Class 2L.

[0103] 2. By mixing 3,3,3-trifluoropropyne with R32 and R1234yf, the GWP value of R32 can be reduced to less than 150.

[0104] 3. By mixing 3,3,3-trifluoropropyne with R32 and R1234yf, the atmospheric boiling point of R1234yf is lowered to below -40°C, with good cooling and heating performance.

[0105] The present invention provides an air-conditioning system with an environmentally friendly refrigerant. The main component of the environmentally friendly refrigerant is 3,3,3-trifluoropropyne (TFP), which has a normal pressure boiling point of approximately -48°C and good cooling and heating performance. The refrigerant has a global warming potential (GWP) of only 11. The presence of two more fluorine atoms than hydrogen atoms results in good flammability. Refrigerants such as R32 and R1234yf are proposed to further improve the flammability of 3,3,3-trifluoropropyne. While ensuring a low GWP and good performance, the flammability level can reach Class 2L (GB / T7778-2017 Refrigerant Numbering Method and Safety Classification), making it a good alternative to R290.

[0106] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A mixed refrigerant, characterized in that: It consists of a first component and a second component, wherein: the first component is 3,3,3-trifluoropropyne, and the second component is difluoromethane and 2,3,3,3-tetrafluoropropylene; In terms of mass percentage, the mass ratio of 3,3,3-trifluoropropyne to the mixed refrigerant is 40-98%, the mass ratio of difluoromethane to the mixed refrigerant is 1-21%, and the mass ratio of 2,3,3,3-tetrafluoropropylene to the mixed refrigerant is 1-39%.

2. The mixed refrigerant according to claim 1, characterized in that: The mass ratio of the 3,3,3-trifluoropropyne, the difluoromethane and the 2,3,3,3-tetrafluoropropene is 0.60:0.04:0.36; or The mass ratio of the 3,3,3-trifluoropropyne, the difluoromethane and the 2,3,3,3-tetrafluoropropene is 0.60:0.20:0.20; or The mass ratio of the 3,3,3-trifluoropropyne, the difluoromethane and the 2,3,3,3-tetrafluoropropene is 0.68:0.04:0.28; or The mass ratio of the 3,3,3-trifluoropropyne, the difluoromethane and the 2,3,3,3-tetrafluoropropylene is 0.68:0.20:0.

12.

3. The mixed refrigerant according to claim 1, characterized in that: The mass ratio of the 3,3,3-trifluoropropyne, the difluoromethane and the 2,3,3,3-tetrafluoropropene is 0.76:0.04:0.20; or The mass ratio of the 3,3,3-trifluoropropyne, the difluoromethane and the 2,3,3,3-tetrafluoropropylene is 0.76:0.20:0.

04.

4. The mixed refrigerant according to claim 1, characterized in that: The mass ratio of the 3,3,3-trifluoropropyne, the difluoromethane and the 2,3,3,3-tetrafluoropropylene is 0.80:0.12:0.

08.

5. An air conditioning system, characterized in that: The mixed refrigerant comprises the mixed refrigerant according to any one of claims 1 to 4.

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