Refrigerants and their uses

Abstract

The present application relates to a refrigerant and its use, wherein the refrigerant includes a first component, a second component, a third component and a fourth component, wherein the first component is trifluoroiodomethane; the second component is 1,1,2-trifluoroethylene, the third component is propane; the fourth component includes at least one of 1,1-difluoroethane, 2,3,3,3-tetrafluoropropylene and trans-1,3,3,3-tetrafluoropropylene. In a liquid phase at room temperature and pressure, the first component, the second component, the third component and the fourth component are mixed to obtain a refrigerant, the GWP of the refrigerant is less than 50, the ODP is 0, and it has obvious environmental advantages. At the same time, the thermal performance and unit volume refrigeration capacity of the environmentally friendly mixed refrigerant are similar to those of R290. Compared with R290, the safety of the mixed refrigerant is significantly improved, and the safety level of the mixed refrigerant is better than that of R290, and it can be used in air conditioners.

Description

Technical Field

[0001] The present application relates to the field of refrigeration technology, and in particular to a refrigerant and its use. Background Art

[0002] In the process of global industrialization, the issue of global warming has attracted more and more attention. The rise in global temperature has caused severe challenges to biodiversity and living space. As a responsible major country, my country officially accepted the "Kigali Amendment" to the Montreal Protocol in 2021 to reduce the emission of HFC (hydrofluorocarbon) non-CO2 greenhouse gases. The internationally adopted amendment to the Montreal Protocol requires a refrigerant that does not damage the ozone layer and has a low global warming potential (GWP) value to replace the current high GWP refrigerant and effectively use it in refrigeration systems.

[0003] R290 is a natural and environmentally friendly refrigerant that does not damage the ozone layer and has a low GWP value. It has great potential, but its flammable and explosive properties limit its development in household air conditioners. Summary of the invention

[0004] The purpose of the present application is to provide a refrigerant and its use, the performance of the refrigerant is equivalent to that of R290, and it is not flammable or explosive, and can be used in air conditioning.

[0005] To this end, in a first aspect, an embodiment of the present application provides a refrigerant, which includes a first component, a second component, a third component and a fourth component, wherein the first component is trifluoroiodomethane; the second component is 1,1,2-trifluoroethylene, the third component is propane; and the fourth component includes at least one of 1,1-difluoroethane, 2,3,3,3-tetrafluoropropylene and trans-1,3,3,3-tetrafluoropropylene.

[0006] In a possible implementation, in molar percentage, the first component accounts for 5%-20% of the refrigerant, the second component accounts for 5%-20% of the refrigerant, the third component accounts for 25%-75% of the refrigerant, and the fourth component accounts for 10-50% of the refrigerant.

[0007] In a possible implementation, in molar percentage, the first component accounts for 5%-20% of the refrigerant, the second component accounts for 5%-10% of the refrigerant, the third component accounts for 25%-75% of the refrigerant, and the fourth component accounts for 15-50% of the refrigerant.

[0008] In a possible implementation, in molar percentage, the first component accounts for 5%-20% of the refrigerant, the second component accounts for 5% of the refrigerant, the third component accounts for 25%-45% of the refrigerant, and the fourth component accounts for 30-50% of the refrigerant.

[0009] In one possible implementation, in molar percentage, the first component accounts for 5%-15% of the refrigerant, the second component accounts for 5%-10% of the refrigerant, the third component accounts for 50%-75% of the refrigerant, and the fourth component accounts for 10%-35% of the refrigerant.

[0010] In one possible implementation, in molar percentage, the first component accounts for 5%-20% of the refrigerant, the second component accounts for 5%-10% of the refrigerant, the third component accounts for 45%-75% of the refrigerant, and the fourth component accounts for 10%-45% of the refrigerant.

[0011] In a possible implementation, the fourth component is 1,1-difluoroethane. In terms of molar percentage, in a liquid state at normal temperature and pressure, the trifluoroiodomethane accounts for 20% of the refrigerant, the 1,1,2-trifluoroethylene accounts for 5% of the refrigerant, the propane accounts for 45% of the refrigerant, and the 1,1-difluoroethane accounts for 30% of the refrigerant.

[0012] In a possible implementation, the fourth component is 2,3,3,3-tetrafluoropropene. In terms of molar percentage, in a liquid state at normal temperature and pressure, the trifluoroiodomethane accounts for 5% of the refrigerant, the 1,1,2-trifluoroethylene accounts for 5% of the refrigerant, the propane accounts for 45% of the refrigerant, and the 2,3,3,3-tetrafluoropropene accounts for 45% of the refrigerant.

[0013] In a possible implementation, the fourth component is 2,3,3,3-tetrafluoropropene. In terms of molar percentage, in a liquid state at normal temperature and pressure, the trifluoroiodomethane accounts for 10% of the refrigerant, the 1,1,2-trifluoroethylene accounts for 5% of the refrigerant, the propane accounts for 45% of the refrigerant, and the 2,3,3,3-tetrafluoropropene accounts for 40% of the refrigerant.

[0014] In a second aspect, any of the above refrigerants is used as a heat transfer working medium of an air conditioning device.

[0015] According to a refrigerant and use provided in an embodiment of the present application, the refrigerant includes a first component, a second component, a third component and a fourth component, wherein the first component is trifluoroiodomethane; the second component is 1,1,2-trifluoroethylene, the third component is propane; the fourth component includes at least one of 1,1-difluoroethane, 2,3,3,3-tetrafluoropropylene and trans-1,3,3,3-tetrafluoropropylene. In a liquid phase at room temperature and pressure, the first component, the second component, the third component and the fourth component are mixed to obtain a refrigerant, the GWP of the refrigerant is less than 50, the ODP is 0, and it has obvious environmental advantages. At the same time, the thermal performance and unit volume refrigeration capacity of the environmentally friendly mixed refrigerant are similar to those of R290. Compared with R290, the safety of the mixed refrigerant is significantly improved, and the safety level is better than that of R290, and it can be used in air conditioners. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the data in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0017] An embodiment of the present application provides a refrigerant, comprising a first component, a second component, a third component and a fourth component, wherein the first component is trifluoroiodomethane (R13I1); the second component is 1,1,2-trifluoroethylene (R1123), the third component is propane (R290); the fourth component comprises at least one of 1,1-difluoroethane (R152a), 2,3,3,3-tetrafluoropropylene (R1234yf) and trans-1,3,3,3-tetrafluoropropylene (R1234ze(E)).

[0018] In terms of molar percentage, the first component accounts for 5%-20% of the refrigerant, the second component accounts for 5%-20% of the refrigerant, the third component accounts for 25%-75% of the refrigerant, and the fourth component accounts for 10-50% of the refrigerant.

[0019] The basic material parameters of the first component, the second component, the third component and the fourth component are shown in Table 1.

[0020] Table 1 Basic parameters of each substance

[0021]

[0022] The safety levels are classified according to ASHRAE 34-2019 as follows: non-flammable (A1), weakly flammable (A2L), flammable (A2), and flammable and explosive (A3).

[0023] Example 1

[0024] The fourth component is 1,1-difluoroethane. In terms of molar percentage, in the liquid phase at room temperature and pressure, trifluoroiodomethane accounts for 5% of the refrigerant, 1,1,2-trifluoroethylene accounts for 10% of the refrigerant, propane accounts for 55% of the refrigerant, and 1,1-difluoroethane accounts for 30% of the refrigerant; that is, the four components of trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and 1,1-difluoroethane are physically mixed in a molar ratio of 5:10:55:30 in the liquid phase at room temperature and pressure to obtain an environmentally friendly mixed working fluid.

[0025] Example 2

[0026] The fourth component is 1,1-difluoroethane. In terms of molar percentage, in the liquid phase at room temperature and pressure, trifluoroiodomethane accounts for 10% of the refrigerant, 1,1,2-trifluoroethylene accounts for 5% of the refrigerant, propane accounts for 50% of the refrigerant, and 1,1-difluoroethane accounts for 35% of the refrigerant; that is, the four components of trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and 1,1-difluoroethane are physically mixed in a molar ratio of 10:5:50:35 in the liquid phase at room temperature and pressure to obtain an environmentally friendly mixed working fluid.

[0027] Example 3

[0028] The fourth component is 1,1-difluoroethane. In terms of molar percentage, in the liquid phase at room temperature and pressure, trifluoroiodomethane accounts for 10% of the refrigerant, 1,1,2-trifluoroethylene accounts for 5% of the refrigerant, propane accounts for 70% of the refrigerant, and 1,1-difluoroethane accounts for 10% of the refrigerant; that is, the four components of trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and 1,1-difluoroethane are physically mixed in a molar ratio of 10:5:75:10 in the liquid phase at room temperature and pressure to obtain an environmentally friendly mixed working fluid.

[0029] Example 4

[0030] The fourth component is 1,1-difluoroethane. In terms of molar percentage, in the liquid phase at room temperature and pressure, trifluoroiodomethane accounts for 15% of the refrigerant, 1,1,2-trifluoroethylene accounts for 5% of the refrigerant, propane accounts for 50% of the refrigerant, and 1,1-difluoroethane accounts for 30% of the refrigerant; that is, the four components of trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and 1,1-difluoroethane are physically mixed in a molar ratio of 15:5:50:30 in the liquid phase at room temperature and pressure to obtain an environmentally friendly mixed working fluid.

[0031] Example 5

[0032] The fourth component is 1,1-difluoroethane. In terms of molar percentage, in the liquid phase at room temperature and pressure, trifluoroiodomethane accounts for 20% of the refrigerant, 1,1,2-trifluoroethylene accounts for 5% of the refrigerant, propane accounts for 45% of the refrigerant, and 1,1-difluoroethane accounts for 30% of the refrigerant; that is, the four components of trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and 1,1-difluoroethane are physically mixed in a molar ratio of 20:5:45:30 in the liquid phase at room temperature and pressure to obtain an environmentally friendly mixed working fluid.

[0033] Example 6

[0034] The fourth component is 2,3,3,3-tetrafluoropropene. In terms of molar percentage, in the liquid phase at room temperature and pressure, trifluoroiodomethane accounts for 20% of the refrigerant, 1,1,2-trifluoroethylene accounts for 5% of the refrigerant, propane accounts for 25% of the refrigerant, and 2,3,3,3-tetrafluoropropene accounts for 50% of the refrigerant; that is, trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and 2,3,3,3-tetrafluoropropene are physically mixed in a molar ratio of 20:5:25:50 in the liquid phase at room temperature and pressure to obtain an environmentally friendly mixed working fluid.

[0035] Example 7

[0036] The fourth component is 2,3,3,3-tetrafluoropropene. In terms of molar percentage, in the liquid phase at room temperature and pressure, trifluoroiodomethane accounts for 5% of the refrigerant, 1,1,2-trifluoroethylene accounts for 5% of the refrigerant, propane accounts for 45% of the refrigerant, and 2,3,3,3-tetrafluoropropene accounts for 45% of the refrigerant; that is, trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and 2,3,3,3-tetrafluoropropene are physically mixed in a molar ratio of 5:5:45:45 at room temperature and pressure to obtain an environmentally friendly mixed working fluid.

[0037] Example 8

[0038] The fourth component is 2,3,3,3-tetrafluoropropene. In terms of molar percentage, in the liquid phase at room temperature and pressure, trifluoroiodomethane accounts for 5% of the refrigerant, 1,1,2-trifluoroethylene accounts for 5% of the refrigerant, propane accounts for 65% of the refrigerant, and 2,3,3,3-tetrafluoropropene accounts for 25% of the refrigerant; that is, trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and 2,3,3,3-tetrafluoropropene are physically mixed in a molar ratio of 5:5:65:25 in the liquid phase at room temperature and pressure to obtain an environmentally friendly mixed working fluid.

[0039] Example 9

[0040] The fourth component is 2,3,3,3-tetrafluoropropene. In terms of molar percentage, in the liquid phase at room temperature and pressure, trifluoroiodomethane accounts for 5% of the refrigerant, 1,1,2-trifluoroethylene accounts for 5% of the refrigerant, propane accounts for 70% of the refrigerant, and 2,3,3,3-tetrafluoropropene accounts for 20% of the refrigerant; that is, trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and 2,3,3,3-tetrafluoropropene are physically mixed in a molar ratio of 5:5:70:20 in the liquid phase at room temperature and pressure to obtain an environmentally friendly mixed working fluid.

[0041] Example 10

[0042] The fourth component is 2,3,3,3-tetrafluoropropene. In terms of molar percentage, in the liquid phase at room temperature and pressure, trifluoroiodomethane accounts for 10% of the refrigerant, 1,1,2-trifluoroethylene accounts for 5% of the refrigerant, propane accounts for 45% of the refrigerant, and 2,3,3,3-tetrafluoropropene accounts for 40% of the refrigerant; that is, trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and 2,3,3,3-tetrafluoropropene are physically mixed in a molar ratio of 10:5:45:40 in the liquid phase at room temperature and pressure to obtain an environmentally friendly mixed working fluid.

[0043] Embodiment 11

[0044] The fourth component is 2,3,3,3-tetrafluoropropene. In terms of molar percentage, in the liquid phase at room temperature and pressure, trifluoroiodomethane accounts for 10% of the refrigerant, 1,1,2-trifluoroethylene accounts for 5% of the refrigerant, propane accounts for 75% of the refrigerant, and 2,3,3,3-tetrafluoropropene accounts for 10% of the refrigerant; that is, trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and 2,3,3,3-tetrafluoropropene are physically mixed in a molar ratio of 10:5:75:10 in the liquid phase at room temperature and pressure to obtain an environmentally friendly mixed working fluid.

[0045] Example 12

[0046] The fourth component is 2,3,3,3-tetrafluoropropene. In terms of molar percentage, in the liquid phase at room temperature and pressure, trifluoroiodomethane accounts for 5% of the refrigerant, 1,1,2-trifluoroethylene accounts for 10% of the refrigerant, propane accounts for 60% of the refrigerant, and 2,3,3,3-tetrafluoropropene accounts for 25% of the refrigerant; that is, trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and 2,3,3,3-tetrafluoropropene are physically mixed in a molar ratio of 5:10:60:25 in the liquid phase at room temperature and pressure to obtain an environmentally friendly mixed working fluid.

[0047] Embodiment 13

[0048] The fourth component is 2,3,3,3-tetrafluoropropene. In terms of molar percentage, in the liquid phase at room temperature and pressure, trifluoroiodomethane accounts for 15% of the refrigerant, 1,1,2-trifluoroethylene accounts for 5% of the refrigerant, propane accounts for 50% of the refrigerant, and 2,3,3,3-tetrafluoropropene accounts for 30% of the refrigerant; that is, trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and 2,3,3,3-tetrafluoropropene are physically mixed in a molar ratio of 15:5:50:30 in the liquid phase at room temperature and pressure to obtain an environmentally friendly mixed working fluid.

[0049] Embodiment 14

[0050] The fourth component is trans-1,3,3,3-tetrafluoropropene. In terms of molar percentage, in the liquid phase at room temperature and pressure, trifluoroiodomethane accounts for 5% of the refrigerant, 1,1,2-trifluoroethylene accounts for 5% of the refrigerant, propane accounts for 55% of the refrigerant, and trans-1,3,3,3-tetrafluoropropene accounts for 35% of the refrigerant; that is, trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and 2,3,3,3-tetrafluoropropene are physically mixed in a molar ratio of 5:5:55:35 at room temperature and pressure to obtain an environmentally friendly mixed working fluid.

[0051] Embodiment 15

[0052] The fourth component is trans-1,3,3,3-tetrafluoropropene. In terms of molar percentage, in the liquid phase at room temperature and pressure, trifluoroiodomethane accounts for 5% of the refrigerant, 1,1,2-trifluoroethylene accounts for 5% of the refrigerant, propane accounts for 75% of the refrigerant, and trans-1,3,3,3-tetrafluoropropene accounts for 15% of the refrigerant; that is, trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and trans-1,3,3,3-tetrafluoropropene are physically mixed in a molar ratio of 5:5:75:15 in the liquid phase at room temperature and pressure to obtain an environmentally friendly mixed working fluid.

[0053] Example 16

[0054] The fourth component is trans-1,3,3,3-tetrafluoropropene. In terms of molar percentage, in the liquid phase at room temperature and pressure, trifluoroiodomethane accounts for 10% of the refrigerant, 1,1,2-trifluoroethylene accounts for 5% of the refrigerant, propane accounts for 50% of the refrigerant, and trans-1,3,3,3-tetrafluoropropene accounts for 35% of the refrigerant; that is, trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and trans-1,3,3,3-tetrafluoropropene are physically mixed in a molar ratio of 10:5:50:35 in the liquid phase at room temperature and pressure to obtain an environmentally friendly mixed working fluid.

[0055] Embodiment 17

[0056] The fourth component is trans-1,3,3,3-tetrafluoropropene. In terms of molar percentage, in the liquid phase at room temperature and pressure, trifluoroiodomethane accounts for 10% of the refrigerant, 1,1,2-trifluoroethylene accounts for 5% of the refrigerant, propane accounts for 65% of the refrigerant, and trans-1,3,3,3-tetrafluoropropene accounts for 20% of the refrigerant; that is, trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and trans-1,3,3,3-tetrafluoropropene are physically mixed in a molar ratio of 10:5:65:20 in the liquid phase at room temperature and pressure to obtain an environmentally friendly mixed working fluid.

[0057] Embodiment 18

[0058] The fourth component is trans-1,3,3,3-tetrafluoropropene. In terms of molar percentage, in the liquid phase at room temperature and pressure, trifluoroiodomethane accounts for 10% of the refrigerant, 1,1,2-trifluoroethylene accounts for 5% of the refrigerant, propane accounts for 55% of the refrigerant, and trans-1,3,3,3-tetrafluoropropene accounts for 30% of the refrigerant; that is, trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and trans-1,3,3,3-tetrafluoropropene are physically mixed in a molar ratio of 10:5:55:30 in the liquid phase at room temperature and pressure to obtain an environmentally friendly mixed working fluid.

[0059] Embodiment 19

[0060] The fourth component is trans-1,3,3,3-tetrafluoropropene. In terms of molar percentage, in the liquid phase at room temperature and pressure, trifluoroiodomethane accounts for 20% of the refrigerant, 1,1,2-trifluoroethylene accounts for 5% of the refrigerant, propane accounts for 50% of the refrigerant, and trans-1,3,3,3-tetrafluoropropene accounts for 25% of the refrigerant; that is, trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and trans-1,3,3,3-tetrafluoropropene are physically mixed in a molar ratio of 20:5:50:25 in the liquid phase at room temperature and pressure to obtain an environmentally friendly mixed working fluid.

[0061] Embodiment 20

[0062] The fourth component is 1,1-difluoroethane, 2,3,3,3-tetrafluoropropylene and trans-1,3,3,3-tetrafluoropropylene. In terms of molar percentage, in the liquid phase at room temperature and pressure, trifluoroiodomethane accounts for 5% of the refrigerant, 1,1,2-trifluoroethylene accounts for 10% of the refrigerant, propane accounts for 55% of the refrigerant, 1,1-difluoroethane accounts for 5% of the refrigerant, 2,3,3,3-tetrafluoropropylene accounts for 10% of the refrigerant, and trans-1,3,3,3-tetrafluoropropylene accounts for 15% of the refrigerant. That is, trifluoroiodomethane, 1,1,2-trifluoroethylene, propane, 1,1-difluoroethane, 2,3,3,3-tetrafluoropropylene and trans-1,3,3,3-tetrafluoropropylene are physically mixed in a molar ratio of 5:10:55:5:10:15 in the liquid phase at room temperature and pressure to uniformly obtain an environmentally friendly mixed working fluid.

[0063] Embodiment 21

[0064] The fourth component is 1,1-difluoroethane and 2,3,3,3-tetrafluoropropylene. In terms of molar percentage, in the liquid phase at room temperature and pressure, trifluoroiodomethane accounts for 10% of the refrigerant, 1,1,2-trifluoroethylene accounts for 5% of the refrigerant, propane accounts for 60% of the refrigerant, 1,1-difluoroethane accounts for 5% of the refrigerant, and 2,3,3,3-tetrafluoropropylene accounts for 20% of the refrigerant; that is, the five components of trifluoroiodomethane, 1,1,2-trifluoroethylene, propane, 1,1-difluoroethane and 2,3,3,3-tetrafluoropropylene are physically mixed in a molar ratio of 10:5:60:5:20 in the liquid phase at room temperature and pressure to obtain an environmentally friendly mixed working fluid.

[0065] Embodiment 22

[0066] The fourth component is 1,1-difluoroethane and trans-1,3,3,3-tetrafluoropropylene. In terms of molar percentage, in the liquid phase at room temperature and pressure, trifluoroiodomethane accounts for 15% of the refrigerant, 1,1,2-trifluoroethylene accounts for 5% of the refrigerant, propane accounts for 50% of the refrigerant, 1,1-difluoroethane accounts for 10% of the refrigerant, and trans-1,3,3,3-tetrafluoropropylene accounts for 20% of the refrigerant; that is, trifluoroiodomethane, 1,1,2-trifluoroethylene, propane, 2,3,3,3-tetrafluoropropylene and trans-1,3,3,3-tetrafluoropropylene are physically mixed in a molar ratio of 15:5:50:10:20 in the liquid phase at room temperature and pressure to obtain an environmentally friendly mixed working fluid.

[0067] Embodiment 23

[0068] The fourth component is 2,3,3,3-tetrafluoropropylene and trans-1,3,3,3-tetrafluoropropylene. In terms of molar percentage, in the liquid phase at room temperature and pressure, trifluoroiodomethane accounts for 10% of the refrigerant, 1,1,2-trifluoroethylene accounts for 5% of the refrigerant, propane accounts for 60% of the refrigerant, 2,3,3,3-tetrafluoropropylene accounts for 5% of the refrigerant, and trans-1,3,3,3-tetrafluoropropylene accounts for 15% of the refrigerant; that is, trifluoroiodomethane, 1,1,2-trifluoroethylene, propane, 1,1-difluoroethane and trans-1,3,3,3-tetrafluoropropylene are physically mixed in a molar ratio of 10:5:65:5:15 at room temperature and pressure to obtain an environmentally friendly mixed working fluid.

[0069] Comparative Example 1

[0070] Under normal temperature and pressure liquid phase state, four components of trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and 1,1-difluoroethane are physically mixed in a molar ratio of 10:10:10:70 to obtain an environmentally friendly mixed working fluid.

[0071] Comparative Example 2

[0072] Under normal temperature and pressure liquid phase state, four components of trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and 1,1-difluoroethane are physically mixed in a molar ratio of 40:10:20:30 to obtain an environmentally friendly mixed working fluid.

[0073] Comparative Example 3

[0074] Under normal temperature and pressure liquid phase state, four components of trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and 2,3,3,3-tetrafluoropropylene are physically mixed in a molar ratio of 10:40:20:30 to obtain an environmentally friendly mixed working fluid.

[0075] Comparative Example 4

[0076] Under normal temperature and pressure liquid phase state, four components of trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and 2,3,3,3-tetrafluoropropylene are physically mixed in a molar ratio of 30:20:10:40 to obtain an environmentally friendly mixed working fluid.

[0077] Comparative Example 5

[0078] Under normal temperature and pressure liquid phase state, four components of trifluoroiodomethane (R13I1), 1,1,2-trifluoroethylene (R1123), propane (R290) and trans-1,3,3,3-tetrafluoropropylene (R1234ze(E)) are physically mixed in a molar ratio of 5:35:45:15 to obtain an environmentally friendly mixed working fluid.

[0079] Comparative Example 6

[0080] Under normal temperature and pressure liquid phase state, four components of trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and trans-1,3,3,3-tetrafluoropropylene are physically mixed in a molar ratio of 35:10:30:25 to obtain an environmentally friendly mixed working fluid.

[0081] Comparative Example 7

[0082] Under normal temperature and pressure liquid phase state, four components of trifluoroiodomethane, 1,1,2-trifluoroethylene, propane and trans-1,3,3,3-tetrafluoropropylene are physically mixed in a molar ratio of 5:5:80:10 to obtain an environmentally friendly mixed working fluid.

[0083] Under refrigeration conditions, that is, the evaporation temperature is 10°C, the condensation temperature is 40°C, the superheat is 5°C, the subcooling is 5°C, and the adiabatic efficiency of the compressor is 0.75; the cycle performance parameters of the above-mentioned embodiment, comparative example and R290 refrigerant in the refrigeration system are respectively used for theoretical calculation, and the physical property data are all taken from REFPROP 10.0, and the GWP (calculated by linear addition of mass percentage), relative unit volume refrigeration capacity Qv (ratio with the unit volume refrigeration capacity of R290), relative coefficient of performance COP (ratio with the coefficient of performance of R290), safety category and temperature glide are compared. The temperature glide refers to the change value of the phase change temperature when the refrigerant mixture undergoes a phase change under a certain constant pressure. If the temperature glide is too large, the heat exchanger needs to be re-optimized and designed. The test results are shown in Table 2.

[0084] Table 2 Test results of Example 1-Example 23, R290 and Comparative Example 1-Comparative Example 7

[0085]

[0086]

[0087] It can be seen from Table 1 that the ODP (ozone depletion potential) value of each substance in the first component, the second component, the third component and the fourth component is zero, so the ODP value of the refrigerant obtained after mixing is also zero, that is, the ODP values ​​of Examples 1 to 23 and Comparative Examples 1 to 7 are zero.

[0088] As can be seen from Table 2, the GWP (global warming potential) values ​​of the refrigerants provided in Examples 1 to 23 are all less than 50, and the environmental performance is excellent. The ODP values ​​and GWP values ​​of Examples 1 to 23 can fully meet the goal of reducing carbon emissions in the Kigali Amendment to the Montreal Protocol. At the same time, it can be seen that the relative performance coefficients of Examples 1 to 23 are all greater than 0.98, the relative volumetric cooling capacity is greater than 0.98, and the temperature glide is less than 5°C. Therefore, the relative volumetric cooling capacity and relative performance coefficient of the refrigerant are similar to or better than R290, that is, the refrigerant has good thermodynamic properties. Moreover, the safety level of the refrigerant is A2 or A2. Compared with the safety performance of R290, which is A3, the safety performance of this application is higher and it is not flammable or explosive.

[0089] Therefore, in terms of molar percentage, when the first component accounts for 5%-20% of the refrigerant, the second component accounts for 5%-20% of the refrigerant, the third component accounts for 25%-75% of the refrigerant, and the fourth component accounts for 10-50% of the refrigerant, the refrigerant not only has the environmental protection characteristics of low GWP, but also has thermal performance equivalent to that of R290, volumetric cooling capacity equivalent to or better than that of R290, and temperature glide less than 5°C, and the safety level belongs to A2 or A2L, which is better than R290, and can be a good substitute for R290.

[0090] Further, in Examples 5-7, 10, 12-13, 18-19, 20, 22-23, the first component accounts for 5%-20% of the refrigerant, the second component accounts for 5%-10% of the refrigerant, the third component accounts for 25%-75% of the refrigerant, and the fourth component accounts for 15-50% of the refrigerant in terms of molar percentage. According to Table 2, the safety factor of Examples 6-7, 10, 12-13 and 18-19 is A2L, that is, the safety performance is better.

[0091] Further, in Example 5 to Example 7 and Example 10, the first component accounts for 5%-20% of the refrigerant, the second component accounts for 5% of the refrigerant, the third component accounts for 25%-45% of the refrigerant, and the fourth component accounts for 30%-50% of the refrigerant in terms of molar percentage. According to Table 2, the safety factor of Example 5 to Example 6 and Example 10 is A2L, and the temperature glide is less than 4°C, that is, the safety performance is better and the temperature glide is smaller.

[0092] In embodiments 1 to 4, embodiment 21, the first component accounts for 5% to 15% of the refrigerant, the second component accounts for 5% to 10% of the refrigerant, the third component accounts for 50% to 75% of the refrigerant, and the fourth component accounts for 10% to 35% of the refrigerant. According to Table 2, the relative unit volume refrigeration capacity of embodiments 1 to 4 is greater than 1.05, and the relative unit volume refrigeration capacity effect is better than that of R290.

[0093] Examples 7 to 19 and 23 satisfy the requirement that, in terms of molar percentage, the first component accounts for 5%-20% of the refrigerant, the second component accounts for 5%-10% of the refrigerant, the third component accounts for 45%-75% of the refrigerant, and the fourth component accounts for 10%-45% of the refrigerant. According to Table 2, the GWP of Examples 7 to 19 is less than 3, which is closer to the GWP of R290.

[0094] Comparative Examples 1-7 are not within the molar ratio provided in this application, the temperature glide exceeds 5°C, and the relative performance coefficient or relative volumetric cooling capacity relative to R290 is less than 0.98, the thermodynamic performance is poorer than that of R290, and the safety level of Comparative Example 7 is A3, and the safety performance is relatively low.

[0095] The refrigerant provided by any of the above embodiments can be used as a heat transfer working medium of an air-conditioning device, and the air-conditioning device can be a household air-conditioning device.

[0096] It should be noted that the phrases "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0097] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0098] In addition, for convenience of description, spatially relative terms may be used herein, for example, "below", "below", "beneath", "above", "over", etc. to describe the relationship of one element or feature relative to other elements or features as shown in the figures.

[0099] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A refrigerant, characterized in that: The refrigerant is composed of a first component, a second component, a third component and a fourth component, and the first component is trifluoroiodomethane, which accounts for 5%-20% of the refrigerant in terms of molar percentage; The second component is 1,1,2-trifluoroethylene, accounting for 5%-10% of the refrigerant; the third component is propane, accounting for 25%-75% of the refrigerant; and the fourth component is 1,1-difluoroethane, accounting for 15-50% of the refrigerant.

2. A refrigerant, characterized in that: The refrigerant is composed of a first component, a second component, a third component and a fourth component, and the first component is trifluoroiodomethane, which accounts for 5%-20% of the refrigerant in terms of molar percentage; The second component is 1,1,2-trifluoroethylene, accounting for 5% of the refrigerant, the third component is propane, accounting for 25%-45% of the refrigerant, and the fourth component is 1,1-difluoroethane, accounting for 30%-50% of the refrigerant.

3. A refrigerant, characterized in that: The refrigerant consists of a first component, a second component, a third component and a fourth component. In terms of molar percentage, the first component is trifluoroiodomethane, accounting for 5%-15% of the refrigerant; the second component is 1,1,2-trifluoroethylene, accounting for 5%-10% of the refrigerant; the third component is propane, accounting for 50%-75% of the refrigerant; and the fourth component is 1,1-difluoroethane, accounting for 10%-35% of the refrigerant.

4. A refrigerant, characterized in that: The refrigerant consists of a first component, a second component, a third component and a fourth component. In terms of molar percentage, the first component is trifluoroiodomethane, accounting for 5%-20% of the refrigerant; the second component is 1,1,2-trifluoroethylene, accounting for 5%-10% of the refrigerant; the third component is propane, accounting for 45%-75% of the refrigerant; and the fourth component is 1,1-difluoroethane, accounting for 10%-45% of the refrigerant.

5. A refrigerant, characterized in that: The refrigerant is composed of a first component, a second component, a third component and a fourth component. In terms of molar percentage, in a liquid phase at room temperature and pressure, the first component is trifluoroiodomethane, which accounts for 20% of the refrigerant; The second component is 1,1,2-trifluoroethylene, accounting for 5% of the refrigerant; the third component is propane, accounting for 45% of the refrigerant; and the fourth component is 1,1-difluoroethane, accounting for 30% of the refrigerant.

6. The refrigerant according to any one of claims 1 to 5 is used as a heat transfer working medium of an air conditioning device.

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