Environment-friendly refrigeration composition for compression refrigeration

Abstract

The invention discloses an environment-friendly refrigeration composition for compression refrigeration, the ODP value of the environment-friendly refrigeration composition is 0, the GWP is less than 150, and the refrigeration composition comprises hexafluoropropylene serving as a first component and accounting for 30-50% of the total mass of the refrigeration composition; the trifluoroethylene is used as a second component and accounts for 30-50% of the total mass of the refrigeration composition; the third component is selected from at least one of cyclopropane, difluoromethane or trifluoroacetyl fluoride, and the mass of the third component accounts for 10-30% of the total mass of the refrigeration composition. The refrigeration composition can replace R410A to be used for a household air conditioner or a commercial air conditioner system, parts of the air conditioner system do not need to be replaced, the environmental performance is far better than that of the R410A, and the cycle performance is equivalent to or slightly better than that of the R410A.

Description

Technical Field

[0001] This invention relates to the field of compression refrigeration, and particularly to an environmentally friendly refrigeration composition for compression refrigeration, which is especially suitable as a replacement for R410A in household or commercial air conditioning systems. Background Technology

[0002] As a pillar industry, the household appliance sector, especially the household air conditioning sector, must reduce the use of existing high-GWP HFCs, and the development and application of new environmentally friendly alternative refrigerants are urgently needed.

[0003] In the residential air conditioning industry, the types of refrigerants used are constantly changing with technological advancements and policy adjustments. Currently, the main refrigerants include HCFCs such as R22, and HFCs such as R32, R125, R134a, and R410A. These refrigerants are widely used in residential air conditioning and dominate the market. However, it is worth noting that with increasing environmental awareness and the advancement of environmental policies, the environmental performance requirements for refrigerants are becoming increasingly stringent. HCFCs and HFCs refrigerants, due to their generally high GWP values, are facing restrictions and reductions.

[0004] Future residential air conditioning refrigerants will place greater emphasis on reducing greenhouse gas emissions, minimizing ozone layer depletion, and mitigating potential threats to human health. R410A, a widely used refrigerant in both residential and commercial air conditioning systems, has a GWP of 2088 and faces reductions due to environmental regulations. Currently, there are no environmentally friendly alternative refrigerants with a GWP <150 and comparable performance. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention proposes an environmentally friendly refrigeration composition for compression refrigeration. The refrigeration composition has a GWP < 150, exhibits good stability, and not only meets the performance requirements of household air conditioners but also possesses excellent environmental performance, enabling in-situ replacement of R410A.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] An environmentally friendly refrigeration composition for compression refrigeration, having a GWP < 150, the refrigeration composition comprising:

[0008] Hexafluoropropylene, as the first component, accounts for 30-50% of the total mass of the refrigeration composition;

[0009] Trifluoroethylene, as the second component, accounts for 30-50% of the total mass of the refrigeration composition;

[0010] The third component, selected from at least one of cyclopropane, difluoromethane, or trifluoroacetyl fluoride, accounts for 10-30% of the total mass of the refrigeration composition.

[0011] The refrigeration composition has an ODP value of 0 and a flammability rating of 2L or 1.

[0012] Furthermore, the GWP of the refrigeration composition is <136; even further, the GWP of the refrigeration composition is <100; and even more specifically, the GWP of the refrigeration composition of the present invention can reach 1.

[0013] The third component of the present invention may contain trifluoroacetyl fluoride, which has a boiling point of -59°C and a GWP of <1. Using it as a component of the refrigeration composition can not only reduce the GWP, but also improve the refrigeration and heating performance of the composition.

[0014] Regarding the composition of the environmentally friendly refrigeration composition, preferably, the first component accounts for 35-42% of the total mass of the refrigeration composition; the second component accounts for 35-43% of the total mass of the refrigeration composition; and the third component accounts for 15-25% of the total mass of the refrigeration composition.

[0015] More preferably, the first component accounts for 35-40% of the total mass of the refrigeration composition; the second component accounts for 35-42% of the total mass of the refrigeration composition; and the third component accounts for 20-25% of the total mass of the refrigeration composition. Within this preferred range, the refrigeration composition not only has excellent environmental performance, but also has cycle performance comparable to or better than R410A.

[0016] The refrigeration composition of the present invention has a wider range of lubricant compatibility compared to existing refrigerants.

[0017] The present invention also provides an environmentally friendly heat transfer fluid comprising the above-mentioned refrigeration composition, wherein the heat transfer fluid comprises a lubricating oil selected from at least one of POE, PVE, or fluorinated ether lubricating oils. Specifically, the lubricating oil can be a commercially available lubricating oil, such as RL32H, RL68H, RL170H, SUNISO SL-32s, Danfoss 160SZ, Taiwan Biostar RB68, ICEMATIC SW68, and Mingketu MPF60, etc.

[0018] Furthermore, the mass content of lubricating oil in the heat transfer fluid is 0.2% to 60%, preferably 5% to 25%.

[0019] The present invention also provides the application of any of the foregoing refrigeration compositions or heat transfer fluids in air conditioning or heat pump systems. Specifically, the air conditioning system is a residential air conditioner or a commercial air conditioner.

[0020] The refrigeration composition or heat transfer fluid can replace R410A in residential or commercial air conditioners without replacing any parts of the original air conditioning system.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. The refrigeration composition of the present invention has excellent environmental performance. When replacing R410A in household or commercial air conditioning systems, the system components do not need to be changed. It also has comparable or better cooling / heating performance. It is highly feasible for commercial promotion and is convenient and quick to replace.

[0023] 2. The refrigeration composition of the present invention has good compatibility with conventional metallic and non-metallic materials, is suitable for existing R410A POE lubricating oil, and can also be used in addition to PVE and fluorinated ether lubricating oils.

[0024] 3. The refrigeration composition of the present invention has good stability and can operate stably for a long time under refrigeration and air conditioning conditions.

[0025] 4. The refrigeration compositions of the present invention have very low GWP, all less than 136, and non-PFAS substances are considered as much as possible in the selection of components. Attached Figure Description

[0026] Appendix Figure 1 This is a schematic diagram of the circulation of the refrigeration composition in a compression refrigeration system, where: 1-compressor; 2-four-way valve; 3-indoor heat exchanger; 4-throttle valve; 5-outdoor heat exchanger. Detailed Implementation

[0027] The present invention will be further described below with reference to specific embodiments, but the invention is not limited to these specific embodiments. Those skilled in the art should recognize that the present invention covers all alternatives, improvements, and equivalents that may be included within the scope of the claims.

[0028] I. Refrigeration Compositions and Basic Properties

[0029] The refrigeration composition of the present invention is physically mixed according to the mass ratio of each component to form a stable composition, as shown in Table 1 below:

[0030] Table 1 Composition of the refrigeration compositions in each embodiment

[0031]

[0032] Note: The mass ratio of each component in each embodiment is the mass ratio of each component in the table from left to right.

[0033] Table 2. Basic physical properties of the refrigeration compositions and R410A in each embodiment.

[0034]

[0035]

[0036] The refrigeration composition of this invention has a GWP much lower than R410A, and exhibits excellent environmental performance.

[0037] II. Properties of the Refrigeration Composition

[0038] Appendix Figure 1 The system cycle flow of the refrigeration composition of the present invention in a compression refrigeration system (domestic or commercial air conditioner) is illustrated schematically, specifically as follows:

[0039] During cooling, compressor 1 draws in low-temperature, low-pressure refrigerant vapor, compresses it into high-temperature, high-pressure vapor, and then enters outdoor heat exchanger 5 through four-way valve 2. After heat exchange, it is cooled and depressurized by expansion valve 4, and then enters indoor heat exchanger 3. The low-temperature, low-pressure refrigerant absorbs heat and boils, and is drawn back into compressor 1. The above process is repeated, thereby achieving the effect of indoor cooling.

[0040] During heating, the high-temperature and high-pressure vapor compressed by the compressor 1 enters the indoor heat exchanger 3 through the four-way valve 2, releasing heat to the indoor environment. After being cooled and depressurized by the throttling valve 4, it enters the outdoor heat exchanger 5. The low-temperature and low-pressure refrigerant absorbs heat and boils, and is drawn back into the compressor 1. The above process is repeated, thereby achieving the effect of indoor heating.

[0041] Table 3 shows the cooling and heating performance of the environmentally friendly refrigeration composition and R410A of the present invention when applied to household air conditioners or commercial air conditioning systems under the same operating conditions, which are as follows: evaporation temperature 7.2℃, suction temperature 18.3℃, condensation temperature 54.4℃, and subcooling temperature 46.1℃.

[0042] Table 3 Comparison of cooling / heating performance of the refrigeration compositions in each embodiment with R410A

[0043]

[0044]

[0045] Note: The performance data of the refrigeration compositions in each embodiment are all ratios compared to R410A.

[0046] As shown in Table 3 above, under the same operating conditions (applicable to household or commercial air conditioners), the volumetric cooling capacity, volumetric heating capacity, cooling efficiency, and heating efficiency of the refrigeration composition of the present invention are comparable to, or even superior to, R410A. Considering both temperature glide and cooling / heating capacity, Examples 3, 5, and 8 exhibit superior performance.

[0047] III. Stability and Material Compatibility of Refrigeration Compositions

[0048] In a 1L high-pressure reactor made of 316L stainless steel, clean and dry copper, iron, and aluminum rods were placed separately. 80g of POE lubricating oil was added by weight, the reactor was sealed, and a vacuum was applied at 110℃ for 1 hour. The valve was then closed, and the reactor was allowed to cool to room temperature. 80g of a refrigerant mixture was then weighed and injected. The reactor was heated to 175℃ and held at that temperature for 14 days. After 14 days, heating was turned off, and the refrigerant mixture was collected in gas phase for chromatographic analysis and acidity testing. Once the reactor temperature had dropped to room temperature, the reactor was opened, the lubricating oil and experimental metals were collected, and the mass change of each metal was measured.

[0049] The refrigeration compositions of Examples 1-10 were all tested according to the above method, and the experimental results are shown in Table 4 below:

[0050] Table 4. Results of Stability and Material Compatibility of Refrigeration Compositions

[0051]

[0052]

[0053] Note: The lower the chromatographic purity, the higher the acid value, and the higher the rate of change in the mass of the experimental metal, the more severe the decomposition of the refrigeration composition.

[0054] The refrigeration compositions of each embodiment have undergone stability tests. The refrigerant remained stable without decomposition and showed good compatibility with various materials, meeting the application requirements of household or commercial air conditioning systems.

Claims

1. An environmentally friendly refrigeration composition for compression refrigeration, having a GWP < 150, characterized in that: The refrigeration composition includes: Hexafluoropropylene, as the first component, accounts for 30-50% of the total mass of the refrigeration composition; Trifluoroethylene, as the second component, accounts for 30-50% of the total mass of the refrigeration composition; The third component, selected from at least one of cyclopropane, difluoromethane, or trifluoroacetyl fluoride, accounts for 10-30% of the total mass of the refrigeration composition.

2. The environmentally friendly refrigeration composition according to claim 1, characterized in that: The refrigeration composition has an ODP value of 0 and a flammability rating of 2L or 1.

3. The environmentally friendly refrigeration composition according to claim 2, characterized in that: The GWP of the refrigeration composition is <136.

4. The environmentally friendly refrigeration composition according to claim 1, characterized in that: The first component accounts for 35-42% of the total mass of the refrigeration composition; The second component accounts for 35-43% of the total mass of the refrigeration composition; The third component comprises 15-25% of the total mass of the refrigeration composition.

5. The environmentally friendly refrigeration composition according to claim 4, characterized in that: The first component accounts for 35-40% of the total mass of the refrigeration composition; The second component accounts for 35-42% of the total mass of the refrigeration composition; The third component comprises 20-25% of the total mass of the refrigeration composition.

6. An environmentally friendly heat transfer fluid comprising any one of the refrigeration compositions of claims 1-5, characterized in that: The heat transfer fluid contains a lubricating oil, which is selected from at least one of POE, PVE, or fluoroether lubricating oils.

7. The environmentally friendly heat transfer fluid according to claim 6, characterized in that: The heat transfer fluid contains 0.2% to 60% lubricating oil by mass.

8. The application of the refrigeration composition according to any one of claims 1-5 or the heat transfer fluid according to claim 6 or 7, characterized in that: The refrigeration composition or heat transfer fluid is applied to an air conditioner or heat pump.

9. The application according to claim 8, characterized in that: The air conditioner can be a household air conditioner or a commercial air conditioner.

10. The application according to claim 9, characterized in that: The refrigeration composition or heat transfer fluid can replace R410A in residential or commercial air conditioners without replacing any parts of the original air conditioning system.

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