KR20200066766A - Environment-friendly, non-flammable refrigerant mixture - Google Patents

Abstract

A refrigerant of the present invention relates to a refrigerant used in home air conditioners, commercial air conditioners, and other industrial purposes, such as a freezer and a showcase, and specifically, to a non-flammable and environment-friendly mixed refrigerant, which is composed of 65-85 parts by volume of trifluoroiodomethane (CF_3I), 15-35 parts by volume of propylene (C_3H_6), and 0.1-0.5 parts by volume of hexamethyl silicone oil as an additive, composed of 65-85 parts by volume of trifluoroiodomethane (CF_3I), 10-25 parts by volume of propylene (C_3H_6), 5-10 parts by volume of propane (C_3H_8), and 0.1-0.5 parts by volume of hexamethyl silicone oil, composed of 65-85 parts by volume of trifluoroiodomethane (CF_3I), 3-5 parts by volume of ethane (C_2H_6), 10-15 parts by volume of propylene (C_3H_6), and 0.1-0.5 parts by volume of hexamethyl silicone oil, or composed of 65-85 parts by volume of trifluoroiodomethane (CF_3I), 3-5 parts by volume of ethane (C_2H_6), 10-25 parts by volume of propylene (C_3H_6), 3-5 parts by volume of propane (C_3H_8), and 0.1-0.5 parts by volume of hexamethyl silicone oil, wherein ozone depletion potential (O.D.P) = 0 and global warming potential (G.W.P) = 3 or less.

Description

Non-flammable eco-friendly refrigerant {ENVIRONMENT-FRIENDLY, NON-FLAMMABLE REFRIGERANT MIXTURE}

Refrigerant of the present invention relates to a refrigerant used in household air conditioners, commercial air conditioners and freezers, and other industries such as showcases, trifluoroiodomethane (CF₃I), propylene (C₃H ₆ ), propane (C ₃ H ₈ ), A mixture of at least one of ethane (C ₂ H ₆ ), made into an emulsion state using ultrasonic waves, and relates to a near-azeotropic non-combustible eco-friendly refrigerant formed by polymer bonding.

Refrigerants currently being used in home air conditioners, commercial air conditioners and freezers, showcases, and other industries include HCFC (Hydro-Chloro-Fluoro-Carbon), HFC (Hydro-Fluoro- Carbon), HFO (Hydro-Fluoro-Propene), HC Hydrocarbon). Refrigerants mixed with HFC and HCFC are not easily decomposed when released into the atmosphere, so they move to the atmosphere, combine with ozone, and destroy the ozone layer, so CFC and HCFC refrigerants have already been banned in 1996 by the world according to the Montreal Convention. , HCFC has agreed to ban all use in 2030 and is currently reducing its use.

Instead of these refrigerants, different HFC and HCFC mixed refrigerants have been used, but these refrigerants also have a high global warming index, so they are banned for use in all air conditioners and new refrigeration systems produced in Europe and around 2017. Instead, HC refrigerant R-290 Refrigerant is used, but its use is limited due to flammability. On the other hand, recently, HFO refrigerant or HFO mixed refrigerant or HFC-32 is mixed with CF3I, etc., and attempts to lower the flammability to A2L. However, this refrigerant also has a G.W.P (Global Warming Potential) of 600 or more, and these refrigerants do not have price competitiveness, so their effect on the industry is very large, and consumers are avoiding them.

In accordance with the Montreal Protocol or the Kyoto Agreement and the Paris Kigali Agreement, HCFC and HFC are in danger of being used up in the near future, and HC carbon refrigerants are flammable and due to flammability, the provisions of ISO 817-2014-5-15 and the United States However, it is expected to be recognized for commercial use in the near future, although its use has been restricted to less than 57g by SNAP (Significant New Alternative Policy). Refrigerant researchers are currently interested in non-combustible HC mixed refrigerants. However, a selective azeotropic non-flammable mixed refrigerant (R-400 series) made with a proper percentage of mixed volume ratio has not yet been developed, and general mixed refrigerants with a global warming index of GWP=600 or higher have been developed, but have a large temperature gradient to freeze. There is a problem that causes irregular operation in the system.

In Korean Patent Registration No. 1009692560000 (2010.07.02.), ethane 1,1,-difluoroethane (R-152a) 85~98 kg, propylene (R-1270) 0.3~3 kg, propane ( R-290) It is composed of 1~5 kg, and 0.1~0.5 kg of nuclear silicon methyl oil, and has a ozone depletion index (ODP=0) and a refrigerant composition with a global warming index (GWP=117.5). And

In Korean Patent Registration No. 1009764490000 (2010.08.11), ethane-based 1,1-difluoroethane (R-152a) 55-65 kg, trifluoromethyl iodine (CF ₃ I) 10-25 kg, 10 to 19 kg of propylene (R-1270), 3 to 5 kg of propane (R-290), 2 to 5 kg of ethane (R-170), and 0.1 to 1.5 kg of nuclear methyl silicone oil, destroying the ozone layer A refrigerant composition with an index of 0 (ODP) and a global warming index (GWP) of 79 is disclosed,

In Korean Patent Registration No. 1009764480000 (2010.08.11), hydrocarbon-based propane (R-290) 50-56 kg and isobutane (R-600a) 40-49 kg are based on normal butane (R-600) 2~ The ozone layer destruction index (ODP) is 0 with 5 to 1 kg of propylene (R-1270) added and 0.5 to 1 kg of nuclear methyl methyl oil as an additive to make the azeotrope, and the global warming index (GWP) is 3 Phosphorus mixed refrigerant composition is described,

In Korean Patent Registration No. 1011393770000 (2012.04.17), 80~99kg of propane (R-290) and 1~20kg of dimethyl ether (R-E170) are added, and methyl methyl nuclear fuel is used to make azeotropic refrigerant mixtures. A refrigerant composition with an ozone depletion index (ODP) of 0 with 0.5 to 1 kg of oil as an additive and a global warming index (GWP) of 3 is disclosed,

In Korean Patent Registration No. 1009692570000 (2010.07.02), ethane-based 1,1-difluoroethane (R-152a) 85~98kg, 1,1,1,2-tetrafluoroethane (R-134a) ) 1~5kg, propylene(R-1270) 0.5~5kg, propane(R-290) 1~5kg and nuclear methyl silicone oil 0.1~0.5kg, ozone depletion index (ODP) is 0, global warming It can be seen that a refrigerant composition having an index (GWP) of 128.2 is disclosed.

1. Domestic Registration Patent Publication No. 1009692560000 (2010.08.11) 2. Domestic registration patent publication registration number 1009764490000 (2010.08.11) 3. Domestic Registration Patent Publication No. 1009764480000 (2010.08.11) 4. Domestic registration patent publication registration number 1011393770000 (2012.04.17) 5. Domestic registration patent publication registration number 1009692570000 (2010.07.02)

As is well known, a refrigerator is generally composed of a compressor, a condenser, a receiver, an expansion valve, an evaporator, and an oil-water separator to perform a refrigeration cycle operation. At this time, the refrigerant is sprayed through an expansion valve in an evaporator and evaporates to set the ambient temperature. After absorbing (endothermic reaction), the evaporated refrigerant is compressed by a compressor, sent to a condenser through an oil-water separator, condensed (exothermic reaction), and then refrigerated by repeating a refrigeration cycle operation that is returned to the receiver. Typical refrigerants used at this time are ammonia, carbon dioxide, and chlorofluorocarbons (hereinafter referred to as “CFC” systems), which are good for condensation and vaporization at low pressure and small temperature difference, ie Freon-based gas and HFC (Hydro- Fluoro-Carbon) gases R-11 (CCI3F), R-12 (CCI2F2), R-13 (CCIF3), R-22 (CHCIF2), R-113 (CCI2FCCI F2), R-114 (CCLF2CCIF2), R-134a (C2H2F4), R-500 (R12/R152a) and R-502 (R22/R115) are used. (Where R stands for Refrigerant).

Among these refrigerants, ammonia has problems of toxicity, metal corrosion, deliquescent, and harmfulness to the human body, but the refrigerant of the freon-based gas that solves them has good refrigeration ability, and has no toxicity, explosiveness, corrosiveness to metal, and no harmfulness to human body It has been developed and used as an excellent refrigerant. However, recently CFC-based refrigerants have been found to destroy the stratospheric ozone (O3), which has been completely banned since 1996, and is a substance that causes global warming. Certain Freon R-11 (CCI3F), R-12 (CCI2F2), R-13 (CCIF3), R-22 (CHCIF2), R-113 (CCI2FCCIF2), R-114 (CCI F2CCIF2), R-500 (R12/R152a) and R-502 (R22/R115) Of course, HFC (Hydro-Fluoro-Carbon) series R-134a (C2H2F4) or R-22 (HCFC Hydro-Chloro-Fluoro-Carbon) series are also subject to use restrictions and have been reduced since 2017.

Among these refrigerants, R-134a is mainly used in relatively small refrigerators such as automobile air conditioners and household electric refrigerators, and R-22 (referred to as “HCFC” system) has a larger refrigeration capacity per volume than R-134a. Used in compressors, and is used in home and industrial air conditioners.

These “HCFC”-based Freon R-113 (CCI2FCCIF2) and R-114 (CCIF2CCIF2) are mainly used in turbo refrigerators. For example, R-115 and R-22 are mixed to form an azeotroped refrigerant R-502, which is low temperature. It is used as a refrigerant for dragons.

In addition, when the air and moisture are mixed with the Freon refrigerant, hydrofluoric acid is generated, and there is a defect that causes corrosion in compressors and pipes. For this reason, the conventional Freon freezer must adopt a method of removing moisture by using a drying agent such as silica gel. In addition, refrigeration oil is used as a lubricant to protect compressors from mechanical abrasion, etc. This refrigeration oil must be obtained to be able to stably share with a refrigerant without losing lubricity even at low temperatures.

In the case of a freon-based refrigerant, the refrigeration oil is melted to a certain temperature and the refrigerant is melted and combined. In the case of a Freon-based refrigerant, refrigeration oil is designed to be circulated in the cabin and returned to the crankcase and automatically operated. An oil separator is used when a compressor requiring a large amount of refrigeration oil is used, or when the refrigerant pipe has a long distance.

As refrigerants other than Freon, hydrocarbon-based isobutane, propane, etc. are limited, but there are flammability and explosive properties, so a safety device is needed for this, and a separate design must be made to use the existing Freon refrigerators such as household refrigerators and automobile air conditioners. In other words, since it is necessary to change the basic design of the refrigerant compressor, etc., design changes and replacement of new production facilities are costly and cause cost increase and resource consumption. Moreover, it is not economical because the cost of change is added as well as the disposal of existing air conditioners and refrigerators using refrigerant.

Will the present invention improved the ^domestic properties to achieve the desired Patent No. 1009692560000 (2010.07.02.), And No. Registered Patent No. 1009692570000 (2010.07.02.) Of the refrigerant composition as described above, home air conditioners, commercial air conditioning And refrigerants used in fryers, showcases, and other industries, among trifluoriodomethane (CF₃I), propylene (C ₃ H ₆ ), propane (C ₃ H ₈ ), ethane (C ₂ H ₆ ) It relates to a near-azeotropic non-combustible eco-friendly refrigerant formed by polymer bonding after mixing a kind or more and making it into an emulsion state using ultrasonic waves.

Because it is non-flammable, it can be safely used by users, and although it is a mixed refrigerant, it can use refrigeration devices using refrigerants such as HCFC-22, R-410A, R-407C, etc., which minimize the temperature grade by using additives. The present invention relates to a non-combustible eco-friendly refrigerant that can be used as a drop-in type without modification or modification, and the present invention enables the following to be achieved in the technical background as described above.

In the process of refrigerant manufacturing, if the mixture is selected by mixing volume% of each mixture and mixed using the existing general mixing method, each component is separated according to the vapor pressure, and the freezing capacity (COP) in the refrigeration system decreases or a temperature gradient occurs. There is a phenomenon that the life span is significantly reduced, and the noise characteristics of the compressor are drastically reduced to about 40-50dB (decibel) due to the wear resistance and heat-resistant lubrication due to the additives.

The characteristic of this refrigerant is non-combustible, so it can be safely used by users, and it can be used as a drop-in type without modifying or changing the refrigeration mechanism using refrigerants such as the existing refrigeration cycles HCFC-22 and HCFC-410A. .

The present invention can replace the conventional CFC-based, HFC-based, HFO-based refrigerants without any technical design changes to general automobile air conditioners, home refrigerators, freezers, and other freezers. It is effective in the use of a new eco-friendly non-combustible refrigerant that is free of corrosion and stable in a refrigeration system and has no harm to the human body.

The refrigerant of the present invention relates to a refrigerant used for household air conditioners, commercial air conditioners and freezers, and other industries such as showcases,

It is composed of 65 to 85 parts by volume of trifluoroiodomethane (CF₃I), 15 to 35 parts by volume of propylene (C3H ₆ ), and 0.1 to 0.5 parts by volume of additive nuclear tetramethyl silicone oil,

Trifluoroiodomethane (CF₃I) 65 to 85 parts by volume, propylene (C3H ₆ ) 10 to 25 parts by volume, propane (C3H ₈ ) 5 to 10 parts by volume, hexamethyl silicone oil 0.1 to 0.5 parts by volume, or

It is composed of 65 to 85 parts by volume of trifluoroiodomethane (CF₃I), 3 to 5 parts by volume of ethane (C2H6), 10 to 15 parts by volume of propylene (C₃H ₆ ), 0.1 to 0.5 parts by volume of hexamethyl silicone oil,

Trifluoroiodomethane (CF₃I) 65 to 85 parts by volume, ethane (C2H6) 3 to 5 parts by volume, propylene (C₃H ₆ ) 10 to 15 parts by volume, propane (C₃H ₈ ) 3 to 5 parts by volume, nuclear methyl silicone It is composed of 0.1 to 0.5 parts by volume of oil, and relates to a non-combustible eco-friendly mixed refrigerant having an ODP (Ozone Depletion Potential) = 0 and a GWP (Global Warming Potential) = 3 or less.

First, the present invention is to provide a trifluoro iodomethane (CF₃I) and a flammable HC blend (Hydro carbon blend) refrigerant, an environmentally friendly non-combustible refrigerant mixed with a polymer additive, to be stably used in a refrigeration system.

Second, it is to provide an eco-friendly non-combustible refrigerant that can be used as a DROP-IN type without changing the structure of a refrigerator using a Freon-based, HFC-based, or HFO-based refrigerant.

Third, to provide an eco-friendly non-combustible refrigerant harmless to the body and the global environment.

Fourth, it is to provide an eco-friendly non-combustible refrigerant capable of maintaining a stable mixed refrigerant when operating in a refrigeration system.

The present invention is a refrigerant that provides a method for selecting and mixing a percentage by volume of a mixture having non-flammable properties. The selection of the percentage by volume mixed was carried out as follows.

Example 1

Non-flammable eco-friendly refrigerant was prepared by mixing 75 L of trifluoroiodomethane (CF₃I), 25 L of propylene (R1270; C3H ₆ ), and 0.1 L of nuclear methyl silicone oil.

Example 2

Trifluoroiodomethane (CF₃I) 76ℓ, Propylene (R290; C₃H ₆ ) 19ℓ, Propane (C₃H ₈ )

Non-flammable eco-friendly refrigerant was prepared by mixing 5L and 0.1L of nuclear methyl silicone oil.

Example 3

Trifluoroiodomethane(CF₃I)75ℓ, ethane(C2H6)3ℓ, propylene(R290;C₃H ₆ )

Non-flammable eco-friendly refrigerant was prepared by mixing 22L and 0.1L of nuclear methyl silicone oil.

Example 4

A non-flammable eco-friendly refrigerant was prepared by mixing 77 liters of trifluoroiodomethane (CF₃I), 3 liters of ethane (C2H6), 17 liters of propylene (R290;C₃H ₆ ), 3 liters of propane (C₃H ₈ ), and 0.1 liters of nuclear methyl silicone oil.

With respect to the non-combustible eco-friendly refrigerant, which was manufactured as described above, the performance test of each functional part was performed as follows by applying it to a flammability test and a refrigeration system.

As described above, the role of the additive nuclear tetramethyl silicone oil is 0.1 to 0.5 parts by volume of the additive nuclear tetramethyl silicone oil, which is the amount used to induce the colloidal phenomenon during ultrasonic mixing. If the additive is used in this range or more, entanglement occurs, and if the additive is used, the colloid phenomenon does not occur.

This was confirmed by a scattering experiment using an argon laser (wavelength: 514.15 mm), and a temperature gradient when a refrigerant was produced by the NIST Refprop 9.1 (National Institute of Standards and Technology) program of the mixing method and general mixing method of the present invention ( Temperature Gradient) is shown in Table 1.

Table 2. By taking ASHRAE HBP conditions These are performance experiments measured by the performance (COP) of Korean home air conditioners. When the conventional mixing method (a method by stirring) was selected, there were many temperature gradients of the condensation unit and the compression unit, but it was found that the temperature gradient did not occur when the mixing method of the present invention was selected. As a result of this, it can be seen that the refrigerant of the present invention is a non-flammable and stable azeotropic refrigerant in a refrigeration system.

In addition, for the flammability test, the results of the flammability test according to the standards of ASTM E 681 or ISO 817 2014 are shown in Table 3. Therefore, it has been found that the refrigerant of the present invention is a non-stranded wire azeotrope mixed refrigerant.

Table 4. To verify the compatibility of CF3I with refrigeration oil with non-flammable mixed refrigerants, and to test the durability of the air conditioner compressor, D-model-BHRB51H 510 liter household refrigerator was subjected to overload experiment (HEAVY LOAD LIFE TEST). This is the result.

Table 1. Temperature gradient between mixing method using argon laser (wavelength: 514.15㎜) and general mixing method (Temperature Gradient)

Experiment Mixing ratio (by volume) Temperature gradient mixed by the mixing method of the present invention Temperature gradient mixed with NIST Refprop 9.1 program Example 1 CF3I/R290 (75/25) 0.07℃ 3.9℃ Example 2 CF3I/R1270/R290 (76/19/4) 0.09℃ 3.6℃ Example 3 CF3I/R170/R/1270/(75/3/22) 0.11℃ 3.1℃ Example 4 CF3I/R170/R1270/R290 (77/3/17/3) 0.05℃ 4.2℃

In the above table, the mixing ratio is in parts by volume, and in Examples 1 to 4, nuclear tetramethyl silicone oil is not included since the same volume parts are included.

Table 2. Performance test results of the performance (COP) of a Korean air conditioner using the LHR HBP condition.

Refrigerant R-22 Example 1
CF3I/R1270 Example 2
CF3I/R1270
/R290 Example 3
CF3I/R170
/R1270 Example 4
CF3I/R170
/R1270/R290 Mixing ratio 100 75/25 75/19/5 75/3/22 77/3/17/3 Molecular Weight 86 102 100 101 100 Injection volume (g) 840 950 1000 1050 900 950 1000 900 950 1000 950 1000 1050 Cold air temperature (C) 12.8 12.7 12.1 10.6 17.9 14.4 12.4 17.9 14.4 12.4 14.4 12.7 13.4 Power consumption (W) 1,56 1,67 1.67 1.86 1.53 1.70 1.76 1.534 1.71 1.75 1.78 1.57 1.73 Discharge pressure (bar) 16.8 10.8 11.3 12.9 9.2 11.3 11.7 9.2 11.3 11.7 10.5 10.9 11.4 Evaporator inlet temperature (C) 26.8 70.7 63.9 73.8 72.4 67.4 53.6 72.4 67.4 55.6 65.3 55.5 59.2 Evaporator outlet temperature (C) 15.1 15.0 15.0 15.0 16.2 11.6 12.5 16.2 11.6 11.5 11.9 11.7 11.4 Ambient temperature (C) 38.2 38.3 38.5 38.7 38.5 38.9 38.3 38.5 38.9 38.3 38.5 38.1 38.1

In the above table, the mixing ratio is in parts by volume, and in Examples 1 to 4, the nuclear tetramethyl silicone oils are not included because they contain the same parts by volume.

Fractionation Testing was performed to show that the refrigerant of the present invention is near azeotropic.

In this experiment, the worst case formulation composition was determined using the REFLEAK program developed by the American Standards Institute. REFLEAK is a program that uses the REFPROP 9.1 program described above to determine the worst composition for leaks in gaseous or liquid state. The UL2182 standard requires determining the worst conditions through compositional separation analysis for cases where the liquid refrigerant is 90% filled and 15% filled in a container under some temperature conditions. Therefore, in the case of the refrigerant of the present invention, the composition separation analysis should be performed under the following one temperature condition.

When charging at 90% (CHARGING): 25.0℃

In order to analyze composition separation, the following definitions must be made for composition.

Filling composition (CHARGING COMPOSITION): The composition of the refrigerant sold initially by mixing (MIXTURE). The worst filling composition: Since there is no choice but to have an error in mixing, the composition containing the most combustible refrigerant. It depends on the error of the refrigerant mixing machine and the amount of flammable refrigerant is usually about 1% higher than the filling composition, and the experiment was conducted with the worst filling composition.

According to this definition, the filling composition and the worst filling composition in the refrigerant of the present invention are determined as follows.

Worst filling composition: 1) 74 volume CF3I/26 volume R1270

2) 75 volume CF3I/20 volume R1270/5 volume R290

3) 74 volume CF3I/4 volume R/170/22 volume R290

4) 76 volume CF3I/4 volume R170/17 volume R1270/3 volume R290

Under the above conditions, nuclear hexamethyl silicone oil is not included because it contains the same amount, respectively.

After setting these conditions, the worst leak composition was determined using the REFPROP 9.1 program. The REFLEAK program calculated the worst leak composition without any temperature condition for 15% fill, but tested composition separation under 90% fill at a temperature of 25.0°C for 90% fill.

Table 3. The ratio of the remaining composition when the gas and liquid leaked by 10% at the worst filling composition of Example 1 composition,

Table 4.The ratio of the remaining composition when the gas and the liquid leaked by 10% at the worst filling composition of Example 2 composition,

Table 5 shows the ratio of the remaining composition when the gas and liquid leaked by 10% at the worst filling composition of Example 3,

Table 6.The percentage of remaining composition when the gas and liquid leaked by 10% at the worst filling composition of Example 4 composition,

Table 3 Composition ratio of the non-flammable eco-friendly refrigerant in Example 1 after 25% of gas and liquid refrigerants were discharged by 10%, and the remaining refrigerant was analyzed in a gas chromatograph.

Initial temperature (℃) 25 First percent 60% fill Initial composition composition ratio 75.0/25.0 Each composition
Every Composition Leakage (%) Residual composition (composition) 10 75.1242/25.8758 20 74.2484/25.7516 30 74.3726/25.6274 40 74.4968/25.5032 50 74.6210/25.3790 60 74.7494/25.2548 70 74.8694/25.1306 80 74.9936/25.0064 90 75.1178/24.8822

In the description of the initial composition of the composition of Table 3 and the residual composition (volume) in each composition, the names of trifluoroiodmethane (CF3I) and propylene (R1270) of the composition of Example 1 were deleted. The volume parts of the components were described in order, and the nuclear methyl methyl silicone oil was not described.

Table 4. Composition ratio of the non-flammable eco-friendly refrigerant after Example 2 was released at 25℃ for 10% of gas and liquid refrigerants, and the remaining refrigerant was analyzed by Gas Chromatograph

Starting temperature (℃) 25 Starting percent 60% fill Starting composition 76.0/19.0/5.0 Each composition
Every Composition Leakage (%) Residual Composition (Volume) 10 76.9968/19.9812/5.0220 20 76.0896/19.8700/5.0404 30 76.1569/19.8021/5.0410 40 76.1726/19.7019/5.1255 50 76.0020/19.9961/5.0019 60 76.1358/19.7516/5.1126 70 76.0722/19.8846/5.0432 80 76.2482/19.5549/5.1969 90 76.3082/19.4110/5.2808

In the description of the initial composition of the composition of Table 3 and the residual composition (volume) in each composition, trifluoroiodmethane (CF3I) and propylene (R290) of the composition of Example 1. The name of the propane (R290) was deleted, and the volume of the components was described in order, and the nuclear tetramethyl silicone oil was not described.

Table 5. Composition ratios of non-flammable eco-friendly refrigerants after Example 3 was released at 25℃ for 10% of gas and liquid refrigerants, and the remaining refrigerants were analyzed by Gas Chromatograph

Starting temperature (℃) 25 Starting percent 60% fill Starting composition 75.0/3.0/22.0 Each composition
Every Composition Leakage (%) Residual Composition (Volume) 10 75.9968/3.9812/22.0220 20 75.0896/3.8700/22.0404 30 75.1569/3.8021/22.0410 40 75.1726/3.7019/22.1255 50 75.0020/3.9961/22.0019 60 75.1358/3.7516/22.1126 70 75.0722/3.8846/22.0432 80 75.2482/3.5549/22.1969 90 75.3082/3.4110/22.2808

In the description of the initial composition of the composition of Table 5 and the composition (by volume) of each composition, trifluoroiodmethane (CF3I), propylene (R1270), and protan (C3H8), which are the compositional components of Example 3 The names of the components are described in order of the volume parts of the components, and the nuclear methyl methyl silicone oil is not described.

Table 6. Composition ratios of non-flammable eco-friendly refrigerants after Example 4 was released at 25°C for 10% of gas and liquid refrigerants, and the remaining refrigerant was analyzed by Gas Chromatograph

Starting temperature (℃) 25 Starting percent 60% fill Starting composition 77.0/3.0/17.0/3.0 Each composition
Every Composition Leakage (%) Residual Composition (Volume) 10 77.9874/3.9512/17.0402/3.0215 20 77.0104/3.8891/17.0911/3.0094 30 77.0520/3.8162/17.0556/3.0762 40 77.0102/3.5654/17.3720/3.0524 50 77.1541/3.7460/17.2025/3.8974 60 77.1624/3.8328/17.1594/3.8454 70 77.1988/3.5990/17.1690/3.0332 80 77.2351/3.5235/17.2881/3.9533 90 77.1810/3.5514/17.1722/3.0954

In the description of the initial composition of the composition of Table 6 and the composition (volume) of each composition, trifluoroiodmethane (CF3I), ethane (R170), propylene (R1270), which are the compositional components of Example 4, The name of the propane (R290) was deleted, and the volume of the components was described in order, and the nuclear tetramethyl silicone oil was not described.

Table 7. Flammability test results at 23℃ according to ASTM E 681 or ISO 817 2014 standards

Experiment Flammability test General mixing method Mixing method of the present invention Lower limit Upper limit Lower limit Upper limit Example 1 3.8 20.1 Example 2 3.8 19.5 Example 3 4.0 18.0 Example 4 4.0 20.2

Therefore, in the case of the present refrigerant, it can be seen that the worst leak composition that may occur in the worst filling composition is a near-azeotropic refrigerant and a non-flammable refrigerant, as the non-flammable composition CF3I remains in the same proportion even in the most flammable composition.

In addition, the refrigerant mixed with CF3I is subjected to an overload experiment (HEAVY LOAD LIFE TEST) to see the compatibility with refrigeration oil and the material suitability for refrigeration equipment in the worst conditions where moisture is 50ppm or more. Table 9 shows the capillary block test (CAPILLARY BLOCKAGE TEST), and Table 10 shows the results of the repeated instantaneous operation-stop test (RAPID & ON-OFF CYCLE LIFE TEST).

Table 8 Overload test (HEAVY LOAD LIFE TEST RESULT)

1) Experiment conditions: Nikkei, American cold, Toshiba standards

Suction pressure: 1 Kg _f /㎠

Discharge pressure: 25~30 Kg _f /㎠

Driving time: 1,000HR

Compressor: for R-134a from D

Compressed case temperature: 100±5℃

Example 1 Example 2 Example 3 Example 4 Intake valve GOOD GOOD GOOD GOOD Discharge valve assembly GOOD GOOD GOOD GOOD Circulation silencer assembly GOOD GOOD GOOD GOOD piston GOOD GOOD GOOD GOOD Block GOOD GOOD GOOD GOOD PAG-
105 OIL Color (COLOR) L0.5 L0.5 L0.5 L0.5 TAN(mgKOH/g)0.10 or less 0.0754 0.0733 0.0741 0.0723 Moisture (PPM) 20 or less 2 3 3 2 L/SHELL ASS’Y GOOD GOOD GOOD GOOD

2) Experiment result

Color<COLOR> L0.5: Very pale light yellow

Table 9. CAPILLARY BLOCKAGE TEST RESULT

1) Test conditions TEST CONDITIONS: (G.E standard)

Condensing temperature (CONDENSING TEMP): 54.4℃

Capillary outlet temperature: -29℃

Motor Winding TEMP: 140℃

Compressor case temperature (COMP. CASE TEMP): 110℃

RUNNING TIME: 4 weeks (672 hours)

Compressor: D company

Frozen Oil (REF. OI) L: FREOL S-22T (Japan Energy)

CAP-TUBE: diameter 0.75m × 2.12m

Dryer: XH-5 (R-134a only)

2) Experiment result

Applied parts Example 1 Example 2 Example 3 Example 4 Suction valve (SUC.VALVE) GOOD GOOD GOOD GOOD Discharge valve assembly (DIS. VALVE ASS'Y) GOOD GOOD GOOD GOOD Circulation silencer assembly (DEL. MUFF. ASS’Y) GOOD GOOD GOOD GOOD Piston GOOD GOOD GOOD GOOD Block GOOD GOOD GOOD GOOD Frozen oil
(REF.OIL) Color (COLOR) L1.5 L1.5 L1.5 L1.5 TAN(mgKOH/g)0.10 or less 0.0366 0.0457 0.0422 0.0453 Moisture (PPM) 20 or less 0 One One 0 L/SHELL ASS’Y GOOD GOOD GOOD GOOD CAPILLARY
WAITE FLOW CHANGEABLE 3.3% 3.0% 2.0% 3.5% INLET TUBE GOOD GOOD GOOD GOOD OUTLET TUBE GOOD GOOD GOOD GOOD

Color L1.5: Yellow, L3.0 Brown

Table 10.RAPID & ON-OFF CYCLE LIFE TEST RESULT

1) Repeated instantaneous operation-stop test conditions: (G.E standard)

Suction pressure (SUC. PRESS): 1.0 ± 0.5kgf/㎠

Discharge pressure (DIS. PRESS): 23 ± 2 kgf/㎠

Operating time (ON-TIME): 15 sec

OFF-TIME: 15 sec

Compressed case temperature (COMP CASE TEMP): 90 ± 5℃

RUNNING TIME: 1,000hr

Compressor (Company D)

Frozen Oil (REF.OIL): FREOL S-22T (Japan Energy)

2) Test condition of operation-stop: AMERICOLD SPEC.

Suction pressure (SUC. PRESS): 1.0 ± 0.5kgf/㎠

Discharge pressure (DIS. PRESS): 23 ± 2 kgf/㎠

Operating time: 15 min

Stop time: 15 min

Compressed case temperature: 90 ± 5℃

RUNNING TIME: 1,000hr

Compressor (Company D)

Frozen Oil (REF.OIL): FREOL S-22T (Japan Energy)

3) Experiment result

Applied parts Example 1 Example 2 Example 3 Example 4 Intake valve GOOD GOOD GOOD GOOD Discharge valve assembly (DIS. VALVE ASS'Y) GOOD GOOD GOOD GOOD Circulation silencer assembly (DEL. MUFF. ASS’Y) GOOD GOOD GOOD GOOD Piston GOOD GOOD GOOD GOOD Block GOOD GOOD GOOD GOOD Frozen Oil REF. OIL color RAPI D L1.0 L1.0 L1.0 L1.0 ON-OFFCYCLE L1.0 L1.0 L1.0 L1.0 TAN (mgKOH/g)
0.10 or less RAPI D 0.0405 0.0522 0.0521 0.0431 ON-OFFCYCLE 0.0439 0.0548 0.0493 0.0374 Moisture (PPM)
20 or less RAPI D 16.3 16.5 17.1 16.4 ON-OFFCYCLE 15.3 14.3 15.1 15.6 L/SHELL ASS’Y GOOD GOOD GOOD GOOD

COLOR L1.0: Light yellow

Claims (4)

In the non-flammable eco-friendly refrigerant,
Trifluoro iodomethane (CF₃I) 65 to 85 parts by volume, propylene (C3H ₆ ) 15 to 35 parts by volume, and additive non-flammable silicone oil 0.1 to 0.5 parts by volume non-flammable eco-friendly refrigerant.
In the non-flammable eco-friendly refrigerant,
Trifluoroiodomethane (CF₃I) 65 to 85 parts by volume, propylene (C₃H ₆ ) 10 to 25 parts by volume, propane (C₃H ₈ ) 5 to 10 parts by volume, nuclear methyl methyl oil 0.1 to 0.5 parts by volume Non-combustible eco-friendly refrigerant, characterized by.
In the non-flammable eco-friendly refrigerant,
Trifluoroiodomethane (CF₃I) 65 to 85 parts by volume, ethane (C2H6), propylene (C3H ₆ ) 24.5 to 35 parts by volume, propane (C3H8) 4 to 7 parts by volume and additive nuclear methyl methyl silicone oil 0.1 to 0.5 parts Non-flammable eco-friendly refrigerant, characterized by being composed of skin.


In the non-flammable eco-friendly refrigerant,
Trifluoroiodomethane (CF₃I) 65 to 85 parts by volume, ethane (C2H6) 3 to 5 parts by volume, propylene (C3H6) 10 to 15 parts by volume, propane (C₃H ₈ ) 3 to 5 parts by volume, and nuclear methyl silicone oil Non-combustible eco-friendly refrigerant, characterized in that it is composed of 0.1 to 0.5 volume.