KR20220010339A - Refrigerant composition and air conditioner using the same - Google Patents

Abstract

The present invention relates to a refrigerant composition. The refrigerant composition according to the present invention comprises a mixture of fluorinated hydrocarbons, and the mixture comprises difluoromethane (HFC-32), propylene (HC-1270), and 2,3,3,3-tetrafluoropropene (HFO-1234yf). In the three-component composition diagram in which the sum of the contents of difluoromethane (HFC-32), propylene (HC-1270),and 2,3,3,3-tetrafluoropropene (HFO-1234yf) is 100% by weight, the mixture has a composition ratio included in the range of a pentagon with five points of Point A (HFC-32/HC-1270/HFO-1234yf = 59/23/18 wt%), Point B (HFC-32/HC-1270/HFO-1234yf = 44/23/33 wt%), Point C (HFC-32/HC-1270/HFO-1234yf = 36/22/42 wt%), Point D (HFC-32/HC-1270/HFO-1234yf = 44/12/44 wt%), and Point E (HFC-32/HC-1270/HFO-1234yf = 59/7/34 wt%) as a vortex. Therefore, it is possible to minimize changes in the existing system and provide environmentally friendly and stable performance compared to the currently used refrigerant.

Description

Refrigerant composition and air conditioner using same

The present invention relates to a refrigerant composition that can minimize changes in existing systems and provide environmentally friendly and stable performance compared to currently used refrigerants.

Conventionally, as refrigerants for refrigerators, air conditioners, heat pumps, etc., chlorofluorocarbons (chlorofluorocarbons, hereinafter referred to as CFCs) and hydrochlorofluorocarbons (hereinafter referred to as HCFCs) derived from methane or ethane have been mainly used.

However, recently, the depletion of the ozone layer in the stratosphere by CFCs and HCFCs has emerged as an important global environmental problem, and the production and consumption of CFCs and HCFCs that deplete stratospheric ozone are regulated by the 1987 Montreal Protocol.

In addition, not only the ozone layer depletion problem, but also the global warming problem has started to rise rapidly, and the Kyoto Protocol of 1997 strongly recommends refraining from the use of refrigerants with high global warming potential (GWP). . Reflecting this trend, European and Japanese manufacturers of home air conditioners and heat pumps are trying to develop and use refrigerants with low global warming potential (GWP).

In order for a material to be useful as an alternative refrigerant to the existing refrigerant, it must first have a coefficient of performance similar to that of the existing refrigerant (Coefficient of performance, hereinafter referred to as COP). Here, the coefficient of performance (COP) means the total refrigeration effect compared to the work applied to the compressor. The larger the COP, the better the energy efficiency of the refrigeration/air conditioner.

In addition, in order to use the compressor without significantly modifying it, the replacement refrigerant must have a vapor pressure similar to that of the existing refrigerant and ultimately provide a similar volumetric capacity (hereinafter referred to as VC). Here, the volumetric capacity (VC) refers to the refrigeration effect per unit volume, which is a factor indicating the size of the compressor and is usually proportional to the vapor pressure and the unit is kJ/m ³ . If the replacement refrigerant has a similar volumetric capacity to that of the existing refrigerant, it is very advantageous for the manufacturer to manufacture a refrigeration/air conditioner without changing the compressor or significantly modifying it. This is usually called a drop-in replacement.

However, as a result of research so far, it has been found that, in the case of replacing the existing refrigerant with a pure substance, the volume capacity of the replacement refrigerant is different, so it is inevitably required to change or greatly remodel the compressor, and it is difficult to obtain a coefficient of performance similar to that of the existing refrigerant.

One way to solve this problem is to use a mixed refrigerant composition.

That is, the characteristic of the mixed refrigerant composition is to make the coefficient of performance similar to that of the existing refrigerant by mixing the composition well, and at the same time to give a similar volumetric capacity (VC) to that of the existing refrigerant, thereby making it unnecessary to greatly modify the compressor.

Therefore, there is a need for a mixed refrigerant composition that can replace the existing refrigerants such as HFC-410A and HFC-32 while solving the above problems.

Therefore, the present invention can minimize changes in the existing system and provide environmentally friendly and stable performance compared to currently used refrigerants, difluoromethane (HFC-32), propylene (HC-1270) and 2,3,3 An object of the present invention is to provide a refrigerant composition comprising ,3-tetrafluoropropene (HFO-1234yf).

Another object of the present invention is to provide an air conditioner including a heat exchanger, a compressor, an expander, and a refrigerant pipe through which a refrigerant moves, wherein the refrigerant has the above-described refrigerant composition applied thereto.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned may be understood by the following description, and will be more clearly understood by the examples of the present invention. It will also be readily apparent that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the appended claims.

In order to solve the above technical problem, the present invention is a refrigerant consisting of difluoromethane (HFC-32), propylene (HC-1270) and 2,3,3,3-tetrafluoropropene (HFO-1234yf) A composition is provided.

More specifically, the present invention can minimize changes in the existing system and provide environmentally friendly and stable performance compared to currently used refrigerants, and the difluoromethane (HFC-32), propylene (HC-1270) and 2, As a three-component composition diagram in which the total content of 3,3,3-tetrafluoropropene (HFO-1234yf) is 100% by weight,

Point A (HFC-32/HC-1270/HFO-1234yf = 59/23/18 wt%),

Point B (HFC-32/HC-1270/HFO-1234yf = 44/23/33 wt%),

Point C (HFC-32/HC-1270/HFO-1234yf = 36/22/42 wt%),

Point D (HFC-32/HC-1270/HFO-1234yf = 44/12/44 wt%) and

of point E (HFC-32/HC-1270/HFO-1234yf = 59/7/34 wt%)

A mixture having a composition ratio included in the range of a pentagon having five points as a vertex is provided.

In addition, the present invention provides a refrigerant composition comprising a mixture of fluorinated hydrocarbons,

the mixture comprises difluoromethane (HFC-32), propylene (HC-1270) and 2,3,3,3-tetrafluoropropene (HFO-1234yf);

In the three-component composition diagram in which the sum of the contents of difluoromethane (HFC-32), propylene (HC-1270) and 2,3,3,3-tetrafluoropropene (HFO-1234yf) is 100% by weight in,

Point B (HFC-32/HC-1270/HFO-1234yf = 44/23/33 wt%),

Point C (HFC-32/HC-1270/HFO-1234yf = 36/22/42 wt%) and

of point D (HFC-32/HC-1270/HFO-1234yf = 44/12/44 wt%)

To provide a refrigerant composition, which is a mixture having a composition ratio included in the range of a triangle having three points as vertices.

At this time, the refrigerant composition according to the present invention is characterized in that the global warming potential is 400 or less, particularly 300 or less.

The refrigerant composition according to the present invention is characterized in that the refrigerant charge is reduced to 14 to 26% compared to HFC-401A.

In addition, the refrigerant composition according to the present invention is _{characterized in that the amount of CO 2} generated compared to HFC-410A is reduced to 83 to 91%.

In addition, the refrigerant composition according to the present invention is characterized in that the volume capacity compared to HFC-410A is 95 to 111%.

In addition, the refrigerant composition according to the present invention is characterized in that the temperature gradient is 2.6 ~ 6.0 ℃.

In addition, the present invention provides an air conditioner including a heat exchanger, a compressor, an expander, and a refrigerant pipe through which a refrigerant moves, and to which the above-described refrigerant composition is applied.

According to the present invention, a mixture of difluoromethane (HFC-32), and difluoromethane (HFC-32) and pentafluoroethane (HFC-125) used in conventional home air conditioners and heat pumps (HFC-410A) ) compared to the amount of refrigerant charge and CO ₂ can be reduced.

In addition, the refrigerant composition according to the present invention meets the average global warming potential (GWP) 400 or less by 2030 suggested by EU fluorine-gas regulations, difluoromethane (HFC-32) and pentafluoroethane (HFC) -125) compared to the mixture (HFC-410A), the volume capacity is 95% or more, and it can provide stable ability and efficiency.

In addition, the refrigerant composition according to the present invention can maintain heat transfer performance because the temperature change is 6° C. or less when the phase is changed from a liquid phase to a gas phase under the same pressure.

Furthermore, the refrigerant composition according to the present invention satisfies the refrigerant flammability rating of A2L, has no toxicity, has a lower flammability limit (LFL) greater than 3.5 vol%, has a heat of combustion less than 19000 kJ/kg, and has a combustion rate of 10 cm It can be less than or equal to /s.

In addition to the above-described effects, the specific effects of the present invention will be described together while describing specific details for carrying out the invention below.

1 shows a three-component composition diagram of a refrigerant composition according to the present invention.
2 is a perspective view schematically illustrating an air conditioner according to an embodiment of the present invention.

The above-described objects, features and advantages will be described below in detail with reference to the accompanying drawings, and accordingly, those of ordinary skill in the art to which the present invention pertains will be able to easily implement the technical idea of the present invention. In describing the present invention, if it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

Although the first, second, etc. are used to describe various elements, these elements are not limited by these terms, of course. These terms are only used to distinguish one component from other components, and unless otherwise stated, it goes without saying that the first component may be the second component.

Throughout the specification, unless otherwise stated, each element may be singular or plural.

As used herein, the singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “consisting of” or “comprising” should not be construed as necessarily including all of the various components or various steps described in the specification, some of which components or some steps are It should be construed that it may not include, or may further include additional components or steps.

Hereinafter, a refrigerant composition according to some embodiments of the present invention and an air conditioner to which the same is applied will be described.

<Refrigerant composition>

The present invention is a refrigerant composition comprising a mixture of fluorinated hydrocarbons, difluoromethane (HFC-32), propylene (HC-1270) and 2,3,3,3-tetrafluoropropene (HFO-1234yf) It provides a refrigerant composition comprising.

Specifically, referring to Figure 1, the refrigerant composition according to the present invention is 36 to 59% by weight of difluoromethane (HFC-32), 7 to 23% by weight of propylene (HC-1270), and 18 to 44% by weight of 2,3,3,3-tetrafluoropropene (HFO-1234yf).

More specifically, the refrigerant composition according to the present invention contains the content of difluoromethane (HFC-32), propylene (HC-1270) and 2,3,3,3-tetrafluoropropene (HFO-1234yf). In the three-component composition diagram in which the total is 100% by weight,

Point A (HFC-32/HC-1270/HFO-1234yf = 59/23/18 wt%),

Point B (HFC-32/HC-1270/HFO-1234yf = 44/23/33 wt%),

Point C (HFC-32/HC-1270/HFO-1234yf = 36/22/42 wt%),

Point D (HFC-32/HC-1270/HFO-1234yf = 44/12/44 wt%) and

of point E (HFC-32/HC-1270/HFO-1234yf = 59/7/34 wt%)

It may be a mixture having a composition ratio included in the range of a pentagon having five points as a vertex.

The refrigerant composition according to the present invention was derived from the American Standards Institute REFPROP 9.1 program, thermodynamic cycle theory and mixture stability index theory, and difluoromethane (HFC-32), which is used in conventional home air conditioners and heat pumps, and difluoro Compared to a mixture of methane (HFC-32) and pentafluoroethane (HFC-125) (HFC-410A), the amount of refrigerant charge and CO2 can be reduced.

In addition, the refrigerant composition according to the present invention meets the average global warming potential (GWP) 400 or less by 2030 suggested by EU fluorine-gas regulations, difluoromethane (HFC-32) and pentafluoroethane (HFC) -125) compared to the mixture (HFC-410A), the volume capacity is 95% or more, and it can provide stable ability and efficiency.

In addition, the refrigerant composition according to the present invention can maintain heat transfer performance as the temperature change is 6° C. or less when the phase is changed from a liquid phase to a gas phase under the same pressure.

In addition, the refrigerant composition according to the present invention has a refrigerant flammability rating (Safety Classification) that satisfies A2L, has no toxicity, has a flammability lower limit (LFL) exceeding 3.5 vol%, a heat of combustion is less than 19000 kJ/kg, and a combustion rate may be 10 cm/s or less.

When the refrigerant composition according to the present invention is not included in the range of the pentagon having the five points as vertices, the GWP may exceed 400.

In addition, when the refrigerant composition according to the present invention is not included in the range of the pentagon having the five points as vertices, the volume capacity of the refrigerant is reduced to less than 90% compared to the existing refrigerant, and thus the efficiency may be reduced.

In addition, when the refrigerant composition according to the present invention is not included in the range of the pentagon having the five points as vertices, the _{amount of CO 2} generated compared to the existing refrigerant may not be effectively reduced.

In addition, when the refrigerant composition according to the present invention is not included in the range of the pentagon having the five vertices as the vertices, the temperature gradient difference of the mixed refrigerant is increased, so that the heat transfer ability may be reduced.

In addition, the refrigerant composition according to the present invention is the sum of the contents of difluoromethane (HFC-32), propylene (HC-1270) and 2,3,3,3-tetrafluoropropene (HFO-1234yf). In the three-component composition of 100% by weight,

Point B (HFC-32/HC-1270/HFO-1234yf = 44/23/33 wt%),

Point C (HFC-32/HC-1270/HFO-1234yf = 36/22/42 wt%) and

of point D (HFC-32/HC-1270/HFO-1234yf = 44/12/44 wt%)

In the case of a mixture having a composition ratio included in the range of a triangle having three points as vertices, the global warming potential may be 300 or less.

In addition, the refrigerant composition according to the present invention can reduce the refrigerant charge by 14 to 26% compared to HFC-401A (100%) to 74 to 86%.

In addition, the refrigerant composition according to the present invention can _{reduce the amount of CO 2} generated by 9 to 17%, compared to HFC-410A (100%), to 83 to 91% in the amount of _{CO 2 generated.}

Furthermore, the refrigerant composition according to the present invention has a volume capacity of 6439.8 to 7541.8 kJ/m ³ and a volume capacity of 95 to 111% compared to HFC-410A (6781.9 kJ/m ³ ), so it can provide stable ability and efficiency.

In addition, since the refrigerant composition according to the present invention has a temperature gradient of 2.6 to 6.0 °C, heat transfer efficiency and performance can be improved.

<Air conditioner>

Next, an air conditioner according to the present invention will be described.

The air conditioner according to the present invention includes a heat exchanger, a compressor, an expander, and a refrigerant pipe through which a refrigerant moves, and the refrigerant composition according to the present invention is applied to the refrigerant.

Referring to FIG. 2 , an air conditioner according to an embodiment of the present invention is illustrated. The air conditioner illustrated in FIG. 2 is merely a diagram of the most general embodiment, and the air conditioner according to the present invention is not limited to the air conditioner illustrated in FIG. 2 .

Referring to FIG. 2 , the air conditioner includes an outdoor unit 20 disposed outdoors to exchange heat with external air, an indoor unit 10 disposed indoors for air conditioning, and the outdoor unit 20 and the indoor unit 10. It includes a refrigerant pipe 80 for connecting.

In more detail, the first heat exchanger 30 operates as an evaporator inside the indoor unit 10 , and the second heat exchanger 40 operates as a condenser inside the outdoor unit 20 . In the present invention, the heat exchanger may include both the first heat exchanger 30 and the second heat exchanger 40 .

The outdoor unit 20 exchanges heat with external air to convert the low-temperature and low-pressure gas refrigerant introduced from the indoor unit 10 into a low-temperature and low-pressure liquid refrigerant, and a compressor 50 and an expander 60 may be further provided. have.

The compressor (50) can convert the low-temperature, low-pressure gas refrigerant introduced from the first heat exchanger (30) provided inside the indoor unit (10) into a high-temperature and high-pressure gaseous refrigerant, and the second heat exchanger (40) may convert the high temperature and high pressure gas refrigerant into a liquid refrigerant of room temperature and high pressure, and the expander 60 may convert the liquid refrigerant of room temperature and high pressure into a liquid refrigerant of low temperature and low pressure.

The second heat exchanger 40 is a member in which heat exchange with the outside occurs directly, and a separate outdoor fan 22 may be further provided to introduce external air.

Meanwhile, in the indoor unit 10 , the low-temperature, low-pressure liquid refrigerant introduced from the outdoor unit 20 is converted into a low-temperature, low-pressure gaseous refrigerant, which uses evaporation to lower the indoor temperature. The indoor unit 10 may include a first heat exchanger 30 that converts a low-temperature, low-pressure liquid refrigerant into a low-temperature and low-pressure gaseous refrigerant, and an indoor fan 12 .

The refrigerant pipe 80 is a member that connects the outdoor unit 20 and the indoor unit 10 to allow the refrigerant to flow, and may be appropriately disposed according to the distance between the outdoor unit 20 and the indoor unit 10 .

Of course, in the air conditioner according to the present invention, the indoor unit and the outdoor unit may be integrally formed. In addition, it goes without saying that in the air conditioner according to the present invention, the heat exchanger, the compressor, the expander, and the refrigerant pipe through which the refrigerant moves may be deformed into a desired shape as needed.

Hereinafter, the present invention will be described in more detail through mixed refrigerants according to Examples and Comparative Examples. These embodiments are merely presented as examples in order to explain the present invention in more detail. Therefore, the present invention is not limited to these examples.

<Example>

Example 1: Refrigerant Composition 1

A mixed refrigerant composition was prepared by mixing difluoromethane (HFC-32), propylene (HC-1270), and 2,3,3,3-tetrafluoropropene (HFO-1234yf).

At this time, the difluoromethane (HFC-32) was included in 59% by weight based on the total weight of the mixed refrigerant composition, and the propylene (HC-1270) was included in 23% by weight based on the total weight of the mixed refrigerant composition. , 2,3,3,3-tetrafluoropropene (HFO-1234yf) was included in an amount of 18% by weight based on the total weight of the mixed refrigerant composition.

Example 2: Refrigerant Composition 2

A mixed refrigerant composition was prepared by mixing difluoromethane (HFC-32), propylene (HC-1270), and 2,3,3,3-tetrafluoropropene (HFO-1234yf).

At this time, the difluoromethane (HFC-32) was included in an amount of 44% by weight based on the total weight of the mixed refrigerant composition, and the propylene (HC-1270) was included in an amount of 23% by weight based on the total weight of the mixed refrigerant composition. , 2,3,3,3-tetrafluoropropene (HFO-1234yf) was included in an amount of 33% by weight based on the total weight of the mixed refrigerant composition.

Example 3: Refrigerant Composition 3

A mixed refrigerant composition was prepared by mixing difluoromethane (HFC-32), propylene (HC-1270), and 2,3,3,3-tetrafluoropropene (HFO-1234yf).

At this time, the difluoromethane (HFC-32) was included in 59% by weight based on the total weight of the mixed refrigerant composition, and the propylene (HC-1270) was included in 7% by weight based on the total weight of the mixed refrigerant composition. , 2,3,3,3-tetrafluoropropene (HFO-1234yf) was included in an amount of 34% by weight based on the total weight of the mixed refrigerant composition.

Example 4: Refrigerant Composition 4

A mixed refrigerant composition was prepared by mixing difluoromethane (HFC-32), propylene (HC-1270), and 2,3,3,3-tetrafluoropropene (HFO-1234yf).

At this time, the difluoromethane (HFC-32) was included in an amount of 44% by weight based on the total weight of the mixed refrigerant composition, and the propylene (HC-1270) was included in an amount of 12% by weight based on the total weight of the mixed refrigerant composition. , 2,3,3,3-tetrafluoropropene (HFO-1234yf) was included in an amount of 44% by weight based on the total weight of the mixed refrigerant composition.

Example 5: Refrigerant Composition 5

A mixed refrigerant composition was prepared by mixing difluoromethane (HFC-32), propylene (HC-1270), and 2,3,3,3-tetrafluoropropene (HFO-1234yf).

At this time, the difluoromethane (HFC-32) was included in 36% by weight based on the total weight of the mixed refrigerant composition, and the propylene (HC-1270) was included in 22% by weight based on the total weight of the mixed refrigerant composition. , 2,3,3,3-tetrafluoropropene (HFO-1234yf) was included in an amount of 42% by weight based on the total weight of the mixed refrigerant composition.

Comparative Example 1

HFC-410A was prepared by mixing difluoromethane (HFC-32) and pentafluoroethane (HFC-125) in an amount of 50% by weight, respectively.

Table 1 below is difluoromethane (HFC-32), propylene (HC-1270), and 2,3,3,3-tetrafluoropropene (HFO-1234yf) constituting the refrigerant composition according to the present invention, respectively The content of and the content of the constituents of Comparative Example 1 are shown.

Example weight% total amount HFC-32 HC-1270 HFO-1234yf HFC-125 Example 1 59 23 18 - 100 Example 2 44 23 33 - 100 Example 3 59 7 34 - 100 Example 4 44 12 44 - 100 Example 5 36 22 42 - 100 Comparative Example 1 50 - - 50 100

<Experimental example>

Experimental Example 1: Physical properties of refrigerant composition

The physical properties of the refrigerant composition according to the present invention were analyzed and the results are shown in Table 2.

Comparative Example 1 Example 1 Example 2 Example 3 Example 4 Example 5 GWP 2088 399 299 400 299 245 Flammability rating A1 A2L A2L A2L A2L A2L volumetric capacity
[kJ/m ³ ] 6781.9 7541.8 6868.3 6780.9 6446.9 6439.8 100% 111% 101% 100% 95% 95% temperature gradient
(evaporation)
[℃] 0.11 2.57 4.6 3.71 5.4 6.0 Density Condensation
[kg/m ³ ] 1393.9 1030.2 1038.0 1205.6 1153.6 1052.4 refrigerant charge 100% 74% 74% 86% 83% 75% CO ₂ emission 100% 14% 11% 17% 12% 9% Cp/Cv 1.43 1.5 1.42 1.43 1.38 1.37 molar mass
[kg/kmol] 72.6 54.4 59.5 62.6 65.9 63.2 exhaust temperature
[℃] 81 84 81 85 82 80

1) Global Warming Potential (GWP)

1, it can be seen that the refrigerant compositions of Examples 1 and 3 have a global warming potential of 400 or less, and the refrigerant compositions of Examples 2, 4 and 5 have a global warming potential of 300 It can be seen that the following

Accordingly, it can be seen that the refrigerant composition according to the present invention satisfies the EU F-gas regulation, which aims to achieve an average global warming potential of 400 by 2030.

2) Refrigerant flammability rating

As shown in Table 2, it can be seen that the refrigerant flammability rating (Safety Classification) of the refrigerant composition of the present invention satisfies A2L, and when A2L is satisfied, there is no toxicity, and the flammability lower limit (LFL) exceeds 3.5% by volume and the heat of combustion is less than 19000 kJ/kg, and the combustion rate is less than 10 cm/s.

3) volumetric capacity

Volumetric capacity (VC) refers to the refrigeration effect per unit volume, which is a factor indicating the size of the compressor and is usually proportional to the vapor pressure. As shown in Table 2, it can be seen that the volume capacity of the refrigerant composition according to an embodiment of the present invention is 95 to 111% compared to HFC-410A, providing stable ability and efficiency.

4) temperature gradient

A slight temperature gradient can increase the efficiency through the Lorenz cycle, but as the temperature gradient increases, the heat transfer coefficient decreases and it may be difficult to control. However, as shown in Table 2, the refrigerant composition of the present invention has a temperature gradient of 2.6 to 6.0 °C, so it can be seen that the efficiency can be increased.

5) Refrigerant charge

As shown in Table 2, the refrigerant composition of the present invention can exhibit the same level of performance as HFC-401A even though the refrigerant charge amount is reduced by 14 to 26% compared to HFC-401A by 74 to 86%.

6) CO ₂ emission

As described in Table 2, in the refrigerant composition of the present invention, the _{amount of CO 2} generated is 9 to 17%, and it can be seen that the amount of _{CO 2 generated is reduced to 83 to 91% compared to HFC-410A.}

As described above, the present invention has been described with reference to the illustrated drawings, but the present invention is not limited by the embodiments and drawings disclosed in this specification, and various methods can be obtained by those skilled in the art within the scope of the technical spirit of the present invention. It is obvious that variations can be made. In addition, although the effects according to the configuration of the present invention have not been explicitly described and described while describing the embodiments of the present invention, it is natural that the effects predictable by the configuration should also be recognized.

10: indoor unit
12: indoor fan
20: outdoor unit
22: outdoor fan
30: first heat exchanger
40: second heat exchanger
60: inflator
80: refrigerant pipe

Claims (9)

A refrigerant composition comprising a mixture of fluorinated hydrocarbons,
the mixture comprises difluoromethane (HFC-32), propylene (HC-1270) and 2,3,3,3-tetrafluoropropene (HFO-1234yf);
In the three-component composition diagram in which the sum of the contents of difluoromethane (HFC-32), propylene (HC-1270) and 2,3,3,3-tetrafluoropropene (HFO-1234yf) is 100% by weight in,
Point A (HFC-32/HC-1270/HFO-1234yf = 59/23/18 wt%),
Point B (HFC-32/HC-1270/HFO-1234yf = 44/23/33 wt%),
Point C (HFC-32/HC-1270/HFO-1234yf = 36/22/42 wt%),
Point D (HFC-32/HC-1270/HFO-1234yf = 44/12/44 wt%) and
of point E (HFC-32/HC-1270/HFO-1234yf = 59/7/34 wt%)
A refrigerant composition, which is a mixture having a composition ratio included in the range of a pentagon having five points as a vertex.
A refrigerant composition comprising a mixture of fluorinated hydrocarbons,
the mixture comprises difluoromethane (HFC-32), propylene (HC-1270) and 2,3,3,3-tetrafluoropropene (HFO-1234yf);
In the three-component composition diagram in which the sum of the contents of difluoromethane (HFC-32), propylene (HC-1270) and 2,3,3,3-tetrafluoropropene (HFO-1234yf) is 100% by weight in,
Point B (HFC-32/HC-1270/HFO-1234yf = 44/23/33 wt%),
Point C (HFC-32/HC-1270/HFO-1234yf = 36/22/42 wt%) and
of point D (HFC-32/HC-1270/HFO-1234yf = 44/12/44 wt%)
The refrigerant composition, which is a mixture having a composition ratio included in the range of a triangle having three points as vertices.
According to claim 1,
The refrigerant composition has a global warming potential of 400 or less.
3. The method of claim 2,
The refrigerant composition has a global warming potential of 300 or less.
3. The method of claim 1 or 2,
The refrigerant composition is a refrigerant composition, characterized in that the refrigerant charge is reduced by 14 to 26% compared to HFC-401A.
3. The method of claim 1 or 2,
The refrigerant composition is a refrigerant composition, characterized in that the amount of _{CO 2} generated is reduced by 83 to 91% compared to HFC-410A.
3. The method of claim 1 or 2,
The refrigerant composition has a volume capacity of 95 to 111% compared to HFC-410A.
3. The method of claim 1 or 2,
The refrigerant composition is a refrigerant composition, characterized in that the temperature gradient is 2.6 ~ 6.0 ℃.
An air conditioner comprising a heat exchanger, a compressor, an expander, and a refrigerant pipe through which the refrigerant moves,
The refrigerant is an air conditioner to which the refrigerant composition according to claim 1 or 2 is applied.

Images