JP2021001323A - Working medium for refrigeration cycle and refrigeration cycle system - Google Patents

Abstract

To provide a working medium for refrigeration cycle which can effectively suppress or alleviate a disproportionation reaction with 1,2-difluoroethylene (R1132), and a refrigeration cycle system using the same.SOLUTION: A working medium for refrigeration cycle contains 1,2-difluoroethylene (R1132) as a refrigerant component. The working medium for refrigeration cycle further contains haloalkane that has 1 or 2 carbon atoms and excludes the case where all of halogen atoms are fluorine.SELECTED DRAWING: None

Description

The present disclosure relates to working media for refrigeration cycles and refrigeration cycle systems.

Among 1,2-difluoroethylene (having R1132, cis and trans isomers), especially trans-1,2-difluoroethylene (R1132 (E)) has a small global warming potential (GWP). It is attracting attention as a refrigerant that replaces difluoromethane (R-32) and 1,1,1,2,2-pentafluoroethane (R-125), which are greenhouse gases.

However, R1132 is chemically unstable in that it has an unsaturated bond, and there is a risk of autolysis reaction (disproportionation reaction).

In paragraph [0007] of Patent Document 1, "R1123 (1,1,2-trifluoroethylene) and R1132 (1,2-difluoroethylene) are less stable than conventional refrigerants such as R410A. When a radical is generated, it may be changed to another compound by the disproportionation reaction. Since the disproportionation reaction involves a large heat release, the reliability of the compressor or the refrigeration cycle apparatus may be lowered. Therefore, when R1123 or R1132 is used in a compressor or a refrigeration cycle device, it is necessary to suppress this disproportionation reaction. "

Japanese Unexamined Patent Publication No. 2015-214927

An object of the present disclosure is to provide a refrigeration cycle working medium capable of effectively suppressing or alleviating the disproportionation reaction of R1132, and a refrigeration cycle system using the same.

The present disclosure includes, for example, the inventions described in the following sections.
1. 1. Contains 1,2-difluoroethylene as a refrigerant component,
Further, it contains a haloalkane having 1 or 2 carbon atoms and excluding the case where all halogen atoms are fluorine.
Working medium for refrigeration cycle.
2. 2. Item 2. The working medium for a refrigeration cycle according to Item 1, wherein the 1,2-difluoroethylene is trans-1,2-difluoroethylene.
3. 3. The haloalkane is derived from the following equation (1).
C ₂ H _m X _n ... (1)
(However, X in the formula (1) is a halogen atom selected from the group consisting of F, Cl, Br, and I, m is an integer of 0 or more, n is an integer of 1 or more, and further. The sum of m and n is 6, and when n is 2 or more, X is a halogen atom of the same or different type), and haloethane having the structure shown (except when X is only F), and the following equation (2)
CH _p X _q ... (2)
(However, X in the formula (2) is a halogen atom selected from the group consisting of F, Cl, Br, and I, p is an integer of 0 or more, q is an integer of 1 or more, and further. The sum of p and q is 4, and when q is 2 or more, X is a halogen atom of the same or different type), halomethane having the structure shown in (except when X is F only).
The working medium for a refrigeration cycle according to the above item 1 or 2, which is at least one of the above.
4. Item 3. The working medium for a refrigeration cycle according to Item 3, wherein the halogen atom X is at least one of F and I.
5. Item 3. The working medium for a refrigeration cycle according to Item 3, wherein the halomethane contains Br in the halogen atom X.
6. Item 3. The refrigeration cycle operating medium according to Item 3 or 4, wherein the haloethane is 1,1,1-trifluoro-2-iodoethane (CF ₃ CH ₂ I).
7. Item 3. The working medium for a refrigeration cycle according to Item 3, wherein the halomethane is trifluoroiodomethane (CF ₃ I).
8. Further containing difluoromethane as the refrigerant component,
The working medium for a refrigeration cycle according to any one of Items 1 to 7, wherein the content of the difluoromethane is less than 60% by mass when the total amount of the refrigerant component and the haloalkane is 100% by mass.
9. Item 2. The working medium for a refrigeration cycle according to any one of Items 1 to 7, wherein the content of the haloalkane is 3% by mass or less when the total amount of the refrigerant component and the haloalkane is 100% by mass.
10. Item 9. The working medium for a refrigeration cycle according to Item 9, wherein the content of the haloalkane is 1.2% by mass or more when the total amount of the refrigerant component and the haloalkane is 100% by mass.
11. A refrigeration cycle system configured by using the refrigeration cycle working medium according to any one of Items 1 to 10.

According to the present disclosure, it is possible to provide a refrigeration cycle working medium capable of effectively suppressing or alleviating the disproportionation reaction of R1132, and a refrigeration cycle system using the same.

(A) and (B) are schematic block diagrams showing an example of a refrigeration cycle system according to an embodiment of the present disclosure. It is a figure which showed the points A to T and the line segment connecting them with respect to the refrigerant 2 in the three-component composition diagram in which the sum of HFO-1132 (E), HFO-1123 and R1234yf is 100% by mass. Regarding the refrigerant 3, points A to C, D', G, I, J and K'are shown in the three-component composition diagram in which the sum of HFO-1132 (E), HFO-1123 and R1234yf is (100-a) mass%. In addition, it is a figure which showed the line segment which connects them to each other. Regarding the refrigerant 3, points A to C, D', G, and I are shown in the three-component composition diagram in which the sum of HFO-1132 (E), HFO-1123, and R1234yf is 92.9% by mass (R32 content is 7.1% by mass). , J and K'and the line segments connecting them to each other. Regarding the refrigerant 3, points A to C, D', G, and I are shown in the three-component composition diagram in which the total sum of HFO-1132 (E), HFO-1123, and R1234yf is 88.9% by mass (R32 content is 11.1% by mass). , J, K'and W and the line segments connecting them to each other. Regarding the refrigerant 3, points A, B, G, I, J, are shown in the three-component composition diagram in which the sum of HFO-1132 (E), HFO-1123, and R1234yf is 85.5% by mass (R32 content is 14.5% by mass). It is the figure which showed K'and W and the line segment connecting them to each other. Regarding the refrigerant 3, points A, B, G, I, J, are shown in the three-component composition diagram in which the total sum of HFO-1132 (E), HFO-1123, and R1234yf is 81.8% by mass (R32 content is 18.2% by mass). It is the figure which showed K'and W and the line segment connecting them to each other. Regarding the refrigerant 3, points A, B, G, I, J, are shown in the three-component composition diagram in which the total sum of HFO-1132 (E), HFO-1123, and R1234yf is 78.1% by mass (R32 content is 21.9% by mass). It is the figure which showed K'and W and the line segment connecting them to each other. Regarding the refrigerant 3, points A, B, G, I, J, are shown in the three-component composition diagram in which the total sum of HFO-1132 (E), HFO-1123, and R1234yf is 73.3% by mass (R32 content is 26.7% by mass). It is the figure which showed K'and W and the line segment connecting them to each other. Regarding the refrigerant 3, points A, B, G, I, J, are shown in the three-component composition diagram in which the total sum of HFO-1132 (E), HFO-1123, and R1234yf is 70.7% by mass (R32 content is 29.3% by mass). It is the figure which showed K'and W and the line segment connecting them to each other. Regarding the refrigerant 3, points A, B, G, I, J, are shown in the three-component composition diagram in which the sum of HFO-1132 (E), HFO-1123, and R1234yf is 63.3% by mass (R32 content is 36.7% by mass). It is the figure which showed K'and W and the line segment connecting them to each other. Regarding the refrigerant 3, points A, B, G, I, J, are shown in the three-component composition diagram in which the total sum of HFO-1132 (E), HFO-1123 and R1234yf is 55.9% by mass (R32 content is 44.1% by mass). It is the figure which showed K'and W and the line segment connecting them to each other. Regarding the refrigerant 3, points A, B, G, I, J, are shown in the three-component composition diagram in which the total sum of HFO-1132 (E), HFO-1123, and R1234yf is 52.2% by mass (R32 content is 47.8% by mass). It is the figure which showed K'and W and the line segment connecting them to each other. Regarding the refrigerant 4, the three-component composition diagram in which the sum of HFO-1132 (E), R32 and R1234yf is 100% by mass shows points A to C, E, G, and I to W and line segments connecting them to each other. It is a figure. With respect to the refrigerant 5, the points and line segments that define the refrigerant of the present disclosure are shown in the three-component composition diagram in which the sum of R32, HFO-1132 (E) and R1234yf is 100% by mass. Regarding the refrigerant 5, the points and line segments that specify the refrigerant of the present disclosure are shown in the three-component composition diagram in which the total sum of R32, HFO-1132 (E) and R1234yf is 99.4% by mass (CO ₂ content ratio is 0.6% by mass). It is a figure shown. Regarding the refrigerant 5, the points and line segments that specify the refrigerant of the present disclosure are shown in the three-component composition diagram in which the sum of R32, HFO-1132 (E) and R1234yf is 98.8% by mass (CO ₂ content is 1.2% by mass). It is a figure shown. Regarding the refrigerant 5, the points and line segments that specify the refrigerant of the present disclosure are shown in the three-component composition diagram in which the total sum of R32, HFO-1132 (E) and R1234yf is 98.7% by mass (CO ₂ content is 1.3% by mass). It is a figure shown. Regarding the refrigerant 5, the points and line segments that specify the refrigerant of the present disclosure are shown in the three-component composition diagram in which the sum of R32, HFO-1132 (E) and R1234yf is 97.5% by mass (CO ₂ content is 2.5% by mass). It is a figure shown. Regarding the refrigerant 5, the points and line segments that specify the refrigerant of the present disclosure are shown in the three-component composition diagram in which the sum of R32, HFO-1132 (E) and R1234yf is 96% by mass (CO ₂ content is 4% by mass). It is a figure shown. Regarding the refrigerant 5, the points and line segments that specify the refrigerant of the present disclosure are shown in the three-component composition diagram in which the sum of R32, HFO-1132 (E) and R1234yf is 94.5% by mass (CO ₂ content is 5.5% by mass). It is a figure shown. Regarding the refrigerant 5, the points and line segments that specify the refrigerant of the present disclosure are shown in the three-component composition diagram in which the sum of R32, HFO-1132 (E) and R1234yf is 93% by mass (CO ₂ content is 7% by mass). It is a figure shown. It is a figure which showed the points A to U and the line segment connecting them to each other in the three-component composition diagram in which the sum of HFO-1132 (E), HFO-1123 and R32 is 100% by mass with respect to the refrigerant 6.

The working medium for a refrigeration cycle according to the present disclosure contains 1,2-difluoroethylene (R1132) as a refrigerant component, and has 1 or more carbon atoms as a disproportionation inhibitor that suppresses the disproportionation reaction of R1132. The configuration is 2 and contains a haloalkane (hereinafter, also simply referred to as “the haloalkane”) except when all halogen atoms are fluorine. That is, in the working medium for the refrigeration cycle according to the present disclosure, the disproportionation inhibitor = the haloalkane.

Although R1132 has isomers of cis and trans isomers, unless otherwise specified in the present specification, the notation of "R1132" is cis (R1132 (Z)) or trans (R1132 (E)). )), Or a concept that includes both.

According to the above configuration, the haloalkane is added as a disproportionation inhibitor to the refrigerant component containing R1132 (particularly R1132 (E)) as a main component. In the disproportionation reaction of R1132, a chain reaction is caused by a deHF reaction, but the haloalkane can stabilize the double bond of R1132 and can satisfactorily capture radicals in the chain reaction. Therefore, the disproportionation reaction of R1132 can be effectively suppressed, and the rapid progress of the disproportionation reaction can be alleviated. As a result, the reliability of the working medium for the refrigeration cycle and the refrigeration cycle system using the same can be improved.

In the working medium for the refrigeration cycle having the above configuration, the haloalkane is represented by the following equation (1).
C ₂ H _m X _n ... (1)
(However, X in the formula (1) is a halogen atom selected from the group consisting of F, Cl, Br, and I, m is an integer of 0 or more, n is an integer of 1 or more, and further. The sum of m and n is 6, and when n is 2 or more, X is a halogen atom of the same or different type), and haloethane having the structure shown in the above (except when X is F only), and the following equation. (2)
CH _p X _q ... (2)
(However, X in the formula (2) is a halogen atom selected from the group consisting of F, Cl, Br, and I, p is an integer of 0 or more, q is an integer of 1 or more, and further. The sum of p and q is 4, and when q is 2 or more, X is a halogen atom of the same or different type), halomethane having the structure shown in (except when X is F only).
It is preferable that it is at least one of.

According to the above configuration, by using either [1] a combination of two types of haloethane and halomethane, [2] one type of haloethane, or [3] one type of halomethane as the disproportionation inhibitor. , The suppression of the disproportionation reaction or the relaxation of the progress can be satisfactorily realized.

In the working medium for a refrigeration cycle having the above configuration, it is preferable that the halogen atom X is at least one of F and I in the haloethane. Further, the halomethane preferably has a structure in which the halogen atom X contains Br.

According to the above configuration, as the haloalkane, one that can better realize the effect of suppressing the disproportionation reaction of R1132 or alleviating the progress, or one that is not easily restricted in availability or handleability can be used.

Further, in the working medium for the refrigeration cycle having the above configuration, it is preferable that the haloethane is 1,1,1-trifluoro-2-iodoethane (CF ₃ CH ₂ I). Further, in addition to the above-mentioned composition containing Br, the halomethane is preferably composed of trifluoroiodomethane (CF ₃ I).

Further, in the working medium for the refrigeration cycle having the above configuration, when difluoromethane is further contained as a refrigerant component and the total amount of the refrigerant component and the disproportionation inhibitor is 100% by mass, the content of the difluoromethane. May be less than 60% by mass.

According to the above configuration, as with R1132, it has little impact on the environment and contains difluoromethane, which is a good refrigerant component, so that good properties can be realized as an operating medium for a refrigeration cycle.

Further, in the working medium for the refrigeration cycle having the above configuration, the content of the disproportionation inhibitor is 3% by mass or less when the total amount of the refrigerant component and the disproportionation inhibitor is 100% by mass. It may be a configuration.

According to the above configuration, even if the content of the disproportionation inhibitor is suppressed to 3% by mass or less, the suppression of the disproportionation reaction of R1132 or the relaxation of the progress can be satisfactorily realized. Therefore, even a small content (addition amount) can be used as a good disproportionation inhibitor.

Further, in the working medium for the refrigeration cycle having the above-mentioned structure, the content of the disproportionation inhibitor may be 1.2% by mass or more.

According to the above configuration, when the total amount of the disproportionation inhibitor is 1.2% by mass or more, the disproportionation reaction of R1132 can be suppressed or the progress can be alleviated particularly well. Therefore, even a small content (addition amount) can be used as a good disproportionation inhibitor.

Further, the present disclosure also includes a refrigeration cycle system configured by using the refrigeration cycle working medium having the above configuration.

According to the above configuration, since the refrigeration cycle system is configured by using the above-mentioned working medium for the refrigeration cycle, an efficient refrigeration cycle system can be realized and the reliability of the refrigeration cycle system can be improved.

Hereinafter, typical embodiments of the present disclosure will be specifically described. The working medium for a refrigeration cycle according to the present disclosure contains R1132 as a refrigerant component, and as a disproportionation inhibitor that suppresses the disproportionation reaction of R1132, it has 1 or 2 carbon atoms and all halogen atoms are fluorine. It is a composition containing a haloalkane except for cases.

The refrigeration cycle operating medium according to the present disclosure may contain a compound other than R1132 as a refrigerant component. Further, the working medium for the refrigeration cycle according to the present disclosure may be composed of at least a refrigerant component and a disproportionation inhibitor, but may contain components other than these.

[Refrigerant component]
The working medium for a refrigeration cycle according to the present disclosure contains R1132 as a refrigerant component. R1132 has the structure of the following formula (3), and one of the two hydrogen atoms (H) bonded to the carbon atom (C) at the 1-position of ethylene is substituted with fluorine (F). At the same time, it has a structure in which one of the two hydrogen atoms bonded to the carbon atom at the 2-position is replaced with fluorine. As a result, it has cis and trans isomers at the position of fluorine substitution.

R1132 contains a carbon-carbon double bond. Ozone in the atmosphere generates hydroxyl radicals (OH radicals) by a photochemical reaction, and these hydroxyl radicals easily decompose double bonds. Therefore, R1132 has little influence on ozone layer depletion and global temperature rise.

However, R1132 is also known to cause a rapid disproportionation reaction due to its good degradability. In this disproportionation reaction, HF, soot and the like are generated from R1132.

As a result of diligent studies by the inventors of the present disclosure, a substance capable of suppressing the deHF reaction by stabilizing the double bond of R1132 and efficiently capturing radicals even if a chain reaction occurs. An attempt was made to suppress or alleviate a rapid disproportionation reaction by adding (disproportionation inhibitor) to the working medium for the refrigeration cycle. As a result, as will be described later, it has been independently found that the addition of the haloalkane can provide a suitable disproportionation inhibitor.

Here, the refrigerating cycle operating medium according to the present disclosure may contain a compound (other refrigerant component) other than R1132 as a refrigerant component. Hydro such as difluoromethane, difluoroethane, trifluoroethane, tetrafluoroethane, pentafluoroethane, pentafluoropropane, hexafluoropropane, heptafluoropropane, pentafluorobutane, and heptafluorocyclopentane are typical other refrigerant components. Fluorocarbon (HFC); Hydrofluoroolefins (HFOs) such as monofluoropropene, trifluoropropene, tetrafluoropropene, pentafluoropropene, and hexafluorobutene can be mentioned, but are not particularly limited.

Since these HFCs or HFOs are known to have little effect on ozone layer depletion and global warming, they can be used together with R1132 as a refrigerant component. Only one type of the above-mentioned other refrigerant components may be used in combination, or two or more types may be used in combination as appropriate. Among these, a particularly preferable example is difluoromethane (HFC32, R32).

The content of R1132 in the working medium for the refrigeration cycle is not particularly limited, but the total amount of the refrigerant component and the disproportionation inhibitor described later among the components constituting the working medium for the refrigeration cycle (for convenience of explanation, "refrigerant-related component". When "total amount" is 100% by mass, the content of R1132 may be 40% by mass or more, and the content of R1132 may be 40% by mass as the lower limit as described above. It is preferably 5% by mass or more, more preferably 50% by mass or more, and further preferably 70% by mass or more.

If the content of R1132 is less than 40% by mass of the total amount of the refrigerant-related components, the content of R1132 in the working medium for the refrigeration cycle becomes too low, and other refrigerant components are contained in a large amount. Therefore, in the working medium for the refrigeration cycle, the advantage of using R1132 having a small GWP cannot be sufficiently obtained.

Further, the upper limit of the content of R1132 is not particularly limited, but may be 98.8% by mass or less of the total amount of the refrigerant-related components. As will be described later, since the preferable lower limit value of the disproportionation inhibitor is 1.2% by mass, only R1132 is used as the refrigerant component and no other refrigerant component is used (R1132 is 100% by mass as the refrigerant component). If this is the case, the upper limit of the content of R1132 in the total amount of the refrigerant-related components is inevitably 98.8% by mass.

When a refrigerant component other than R1132 is contained as the refrigerant component, the content of the other refrigerant component is not particularly limited. For example, as described above, difluoromethane is a preferable example of other refrigerant components, but the preferable upper limit of the content of R1132, which is an essential refrigerant component, is 40% by mass of the total amount of the refrigerant-related components. The content of difluoromethane may be less than 60% by mass of the total amount of refrigerant-related components. In the case where other refrigerant components are contained, an example of a particularly preferable content of R1132 may be in the range of 70% by mass to 80% by mass, but is not limited thereto.

In addition, the following refrigerants 1 to 7 can be exemplified as a specific mixed refrigerant composition that can be applied as a refrigerant component of the working medium for a refrigeration cycle of the present disclosure. Among them, each of the refrigerants 1 to 6 is a mixed refrigerant containing R1132 (E), which is preferable as a substitute refrigerant for R410A. Further, the refrigerant 7 is a mixed refrigerant containing R1132 (E), which is preferable as R410A or other alternative refrigerant. In addition, R1132 (E) and HFO-1132 (E) are synonymous.

Refrigerant 1
(Refrigerant 1-1)
The total of trans-1,2-difluoroethylene (HFO-1132 (E)) and trifluoroethylene (HFO-1123) is contained in an amount of 99.5% by mass or more based on the total amount of the refrigerant, and HFO-1132 (E) is contained. , A refrigerant containing 62.0% by mass to 72.0% by mass with respect to the total amount of the refrigerant.

(Refrigerant 1-2)
The total of HFO-1132 (E) and HFO-1123 is contained in an amount of 99.5% by mass or more based on the total amount of the refrigerant, and HFO-1132 (E) is contained in an amount of 45.1% by mass to 47.1% by mass based on the total amount of the refrigerant. Including, refrigerant.

Refrigerant 2
(Refrigerant 2-1)
A refrigerant containing trans-1,2-difluoroethylene (HFO-1132 (E)), trifluoroethylene (HFO-1123) and 2,3,3,3-tetrafluoro-1-propen (R1234yf).

(Refrigerant 2-2)
When the mass% of HFO-1132 (E), HFO-1123 and R1234yf based on the sum of these is x, y and z, respectively, the sum of HFO-1132 (E), HFO-1123 and R1234yf is 100. In the three-component composition diagram that is mass%, the coordinates (x, y, z) are
Point A (68.6, 0.0, 31.4),
Point A'(30.6, 30.0, 39.4),
Point B (0.0, 58.7, 41.3),
Point D (0.0, 80.4, 19.6),
Point C'(19.5, 70.5, 10.0),
Point C (32.9, 67.1, 0.0) and point O (100.0, 0.0, 0.0)
Within or on the line segment AA', A'B, BD, DC', C'C, CO and OA connecting the seven points, respectively (however, the line segments BD, CO and (Excluding points on OA),
The line segment AA'is
Represented in coordinates (x, 0.0016x ² -0.9473x + 57.497, -0.0016x ² -0.0527x + 42.503),
The line segment A'B is
Represented in coordinates (x, 0.0029x ² -1.0268x + 58.7, -0.0029x ² + 0.0268x + 41.3),
The line segment DC'is
Represented in coordinates (x, 0.0082x ² -0.6671x + 80.4, -0.0082x ² -0.3329x + 19.6)
The line segment C'C is
Represented by coordinates (x, 0.0067x ² -0.6034x + 79.729, -0.0067x ² -0.3966x + 20.271), and the line segments BD, CO and OA are straight lines.
Refrigerant.

(Refrigerant 2-3)
When the mass% of HFO-1132 (E), HFO-1123 and R1234yf based on the sum of these is x, y and z, respectively, the sum of HFO-1132 (E), HFO-1123 and R1234yf is 100. In the three-component composition diagram that is mass%, the coordinates (x, y, z) are
Point G (72.0, 28.0, 0.0),
Point I (72.0, 0.0, 28.0),
Point A (68.6, 0.0, 31.4),
Point A'(30.6, 30.0, 39.4),
Point B (0.0, 58.7, 41.3),
Point D (0.0, 80.4, 19.6),
Point C'(19.5, 70.5, 10.0) and point C (32.9, 67.1, 0.0)
It is within the range of the figure surrounded by the line segments GI, IA, AA', A'B, BD, DC', C'C and CG connecting the eight points, respectively, or on the line segment (however, the line segment IA, (Excluding points on BD and CG),
The line segment AA'is
Represented in coordinates (x, 0.0016x ² -0.9473x + 57.497, -0.0016x ² -0.0527x + 42.503),
The line segment A'B is
Represented in coordinates (x, 0.0029x ² -1.0268x + 58.7, -0.0029x ² + 0.0268x + 41.3),
The line segment DC'is
Represented in coordinates (x, 0.0082x ² -0.6671x + 80.4, -0.0082x ² -0.3329x + 19.6)
The line segment C'C is
Represented by coordinates (x, 0.0067x ² -0.6034x + 79.729, -0.0067x ² -0.3966x + 20.271), and the line segments GI, IA, BD and CG are straight lines.
Refrigerant.

(Refrigerant 2-4)
When the mass% of HFO-1132 (E), HFO-1123 and R1234yf based on the sum of these is x, y and z, respectively, the sum of HFO-1132 (E), HFO-1123 and R1234yf is 100. In the three-component composition diagram that is mass%, the coordinates (x, y, z) are
Point J (47.1, 52.9, 0.0),
Point P (55.8, 42.0, 2.2),
Point N (68.6, 16.3, 15.1),
Point K (61.3, 5.4, 33.3),
Point A'(30.6, 30.0, 39.4),
Point B (0.0, 58.7, 41.3),
Point D (0.0, 80.4, 19.6),
Point C'(19.5, 70.5, 10.0) and point C (32.9, 67.1, 0.0)
Line segment connecting the 9 points of JP, PN, NK, KA', A'B, BD, DC', within the range of the figure surrounded by C'C and CJ, or on the line segment (however, the line segment) (Excluding points on BD and CJ),
The line segment PN is
Represented in coordinates (x, -0.1135x ² + 12.112x-280.43, 0.1135x ² -13.112x + 380.43)
The line segment NK is
Represented in coordinates (x, 0.2421x ² -29.955x + 931.91, -0.2421x ² + 28.955x-831.91)
The line segment KA'is
Represented in coordinates (x, 0.0016x ² -0.9473x + 57.497, -0.0016x ² -0.0527x + 42.503),
The line segment A'B is
Represented in coordinates (x, 0.0029x ² -1.0268x + 58.7, -0.0029x ² + 0.0268x + 41.3),
The line segment DC'is
Represented in coordinates (x, 0.0082x ² -0.6671x + 80.4, -0.0082x ² -0.3329x + 19.6)
The line segment C'C is
It is represented by the coordinates (x, 0.0067x ² -0.6034x + 79.729, -0.0067x ² -0.3966x + 20.271), and the line segments JP, BD and CG are straight lines.
Refrigerant.

(Refrigerant 2-5)
When the mass% of HFO-1132 (E), HFO-1123 and R1234yf based on the sum of these is x, y and z, respectively, the sum of HFO-1132 (E), HFO-1123 and R1234yf is 100. In the three-component composition diagram that is mass%, the coordinates (x, y, z) are
Point J (47.1, 52.9, 0.0),
Point P (55.8, 42.0, 2.2),
Point L (63.1, 31.9, 5.0),
Point M (60.3, 6.2, 33.5),
Point A'(30.6, 30.0, 39.4),
Point B (0.0, 58.7, 41.3),
Point D (0.0, 80.4, 19.6),
Point C'(19.5, 70.5, 10.0) and point C (32.9, 67.1, 0.0)
Line segment connecting the 9 points of JP, PL, LM, MA', A'B, BD, DC', within the range of the figure surrounded by C'C and CJ, or on the line segment (however, the line segment) (Excluding points on BD and CJ),
The line segment PL is
Represented in coordinates (x, -0.1135x ² + 12.112x-280.43, 0.1135x ² -13.112x + 380.43)
The line segment MA'is
Represented in coordinates (x, 0.0016x ² -0.9573x + 57.497, -0.0016x ² -0.0527x + 42.503),
The line segment A'B is
Represented in coordinates (x, 0.0029x ² -1.0268x + 58.7, -0.0029x ² + 0.0268x + 41.3),
The line segment DC'is
Represented in coordinates (x, 0.0082x ² -0.6671x + 80.4, -0.0082x ² -0.3329x + 19.6)
The line segment C'C is
It is represented by the coordinates (x, 0.0067x ² -0.6034x + 79.729, -0.0067x ² -0.3966x + 20.271), and the line segments JP, LM, BD and CG are straight lines.
Refrigerant.

(Refrigerant 2-6)
When the mass% of HFO-1132 (E), HFO-1123 and R1234yf based on the sum of these is x, y and z, respectively, the sum of HFO-1132 (E), HFO-1123 and R1234yf is 100. In the three-component composition diagram that is mass%, the coordinates (x, y, z) are
Point P (55.8, 42.0, 2.2),
Point L (63.1, 31.9, 5.0),
Point M (60.3, 6.2, 33.5),
Point A'(30.6, 30.0, 39.4),
Point B (0.0, 58.7, 41.3),
Point F (0.0, 61.8, 38.2) and Point T (35.8, 44.9, 19.3)
It is within the range of the figure surrounded by the line segments PL, LM, MA', A'B, BF, FT and TP connecting the seven points, or on the line segment (however, the points on the line segment BF are excluded). ,
The line segment PL is
Represented in coordinates (x, -0.1135x ² + 12.112x-280.43, 0.1135x ² -13.112x + 380.43)
The line segment MA'is
Represented in coordinates (x, 0.0016x ² -0.9573x + 57.497, -0.0016x ² -0.0527x + 42.503),
The line segment A'B is
Represented in coordinates (x, 0.0029x ² -1.0268x + 58.7, -0.0029x ² + 0.0268x + 41.3),
The line segment FT is
Represented in coordinates (x, 0.0078x ² -0.7501x + 61.8, -0.0078x ² -0.2499x + 38.2),
The line segment TP is
It is represented by the coordinates (x, 0.00672x ² -0.7607x + 63.525, -0.00672x ² -0.2393x + 36.475), and the line segments LM and BF are straight lines.
Refrigerant.

(Refrigerant 2-7)
When the mass% of HFO-1132 (E), HFO-1123 and R1234yf based on the sum of these is x, y and z, respectively, the sum of HFO-1132 (E), HFO-1123 and R1234yf is 100. In the three-component composition diagram that is mass%, the coordinates (x, y, z) are
Point P (55.8, 42.0, 2.2),
Point L (63.1, 31.9, 5.0),
Point Q (62.8, 29.6, 7.6) and Point R (49.8, 42.3, 7.9)
It is within the range of the figure surrounded by the line segments PL, LQ, QR and RP connecting the four points, or on the line segment.
The line segment PL is
Represented in coordinates (x, -0.1135x ² + 12.112x-280.43, 0.1135x ² -13.112x + 380.43)
The line segment RP is
It is represented by the coordinates (x, 0.00672x ² -0.7607x + 63.525, -0.00672x ² -0.2393x + 36.475), and the line segments LQ and QR are straight lines.
Refrigerant.

(Refrigerant 2-8)
When the mass% of HFO-1132 (E), HFO-1123 and R1234yf based on the sum of these is x, y and z, respectively, the sum of HFO-1132 (E), HFO-1123 and R1234yf is 100. In the three-component composition diagram that is mass%, the coordinates (x, y, z) are
Point S (62.6, 28.3, 9.1),
Point M (60.3, 6.2, 33.5),
Point A'(30.6, 30.0, 39.4),
Point B (0.0, 58.7, 41.3),
Point F (0.0, 61.8, 38.2) and Point T (35.8, 44.9, 19.3)
Within or on the line segment surrounded by the line segments SM, MA', A'B, BF, FT, and TS connecting the six points, respectively.
The line segment MA'is
Represented in coordinates (x, 0.0016x ² -0.9573x + 57.497, -0.0016x ² -0.0527x + 42.503),
The line segment A'B is
Represented in coordinates (x, 0.0029x ² -1.0268x + 58.7, -0.0029x ² + 0.0268x + 41.3),
The line segment FT is
Represented in coordinates (x, 0.0078x ² -0.7501x + 61.8, -0.0078x ² -0.2499x + 38.2),
The line segment TS is
It is represented by the coordinates (x, -0.0017x ² -0.7869x + 70.888, -0.0017x ² -0.2131x + 29.112), and the line segments SM and BF are straight lines.
Refrigerant.

Refrigerant 3
(Refrigerant 3-1)
Trans-1,2-difluoroethylene (HFO-1132 (E)), trifluoroethylene (HFO-1123) and 2,3,3,3-tetrafluoro-1-propen (R1234yf) and difluoromethane (R32) It is a refrigerant that contains
In the above-mentioned refrigerant, when the mass% of HFO-1132 (E), HFO-1123, R1234yf and R32 based on the sum of these is x, y and z and a, respectively, HFO-1132 (E) and HFO. In the three-component composition diagram in which the sum of -1123 and R1234yf is (100-a) mass%, the coordinates (x, y, z) are
When 0 <a ≤ 11.1
Point G (0.026a ² -1.7478a + 72.0, -0.026a ² + 0.7478a + 28.0, 0.0),
Point I (0.026a ² -1.7478a + 72.0, 0.0, -0.026a ² + 0.7478a + 28.0),
Point A (0.0134a ² -1.9681a + 68.6, 0.0, -0.0134a ² + 0.9681a + 31.4),
Point B (0.0, 0.0144a ² -1.6377a + 58.7, -0.0144a ² + 0.6377a + 41.3),
Point D'(0.0, 0.0224a ² + 0.968a + 75.4, -0.0224a ² -1.968a + 24.6) and Point C (-0.2304a ² -0.4062a + 32.9, 0.2304a ² -0.5938a + 67.1, 0.0)
It is within the range of the figure surrounded by the straight lines GI, IA, AB, BD', D'C and CG connecting the six points, or on the straight lines GI, AB and D'C (however, points G, point I, (Excluding points A, B, D'and C),
When 11.1 <a ≤ 18.2
Point G (0.02a ² -1.6013a + 71.105, -0.02a ² +0.6013a + 28.895, 0.0),
Point I (0.02a ² -1.6013a + 71.105, 0.0, -0.02a ² + 0.6013a + 28.895),
Point A (0.0112a ² -1.9337a + 68.484, 0.0, -0.0112a ² + 0.9337a + 31.516),
Point B (0.0, 0.0075a ² -1.5156a + 58.199, -0.0075a ² + 0.5156a + 41.801) and point W (0.0, 100.0-a, 0.0)
It is within the range of the figure surrounded by the straight lines GI, IA, AB, BW and WG connecting the five points, or on the straight lines GI and AB (however, the points G, I, A, B and W are except),
When 18.2 <a ≤ 26.7
Point G (0.0135a ² -1.4068a + 69.727, -0.0135a ² + 0.4068a + 30.273, 0.0),
Point I (0.0135a ² -1.4068a + 69.727, 0.0, -0.0135a ² + 0.4068a + 30.273),
Point A (0.0107a ² -1.9142a + 68.305, 0.0, -0.0107a ² + 0.9142a + 31.695),
Point B (0.0, 0.009a ² -1.6045a + 59.318, -0.009a ² + 0.6045a + 40.682) and point W (0.0, 100.0-a, 0.0)
It is within the range of the figure surrounded by the straight lines GI, IA, AB, BW and WG connecting the five points, or on the straight lines GI and AB (however, the points G, I, A, B and W are except),
When 26.7 <a ≤ 36.7
Point G (0.0111a ² -1.3152a + 68.986, -0.0111a ² + 0.3152a + 31.014, 0.0),
Point I (0.0111a ² -1.3152a + 68.986, 0.0, -0.0111a ² + 0.3152a + 31.014),
Point A (0.0103a ² -1.9225a + 68.793, 0.0, -0.0103a ² + 0.9225a + 31.207),
Point B (0.0, 0.0046a ² -1.41a + 57.286, -0.0046a ² + 0.41a + 42.714) and point W (0.0, 100.0-a, 0.0)
It is within the range of the figure surrounded by the straight lines GI, IA, AB, BW and WG connecting the five points, or on the straight lines GI and AB (however, the points G, I, A, B and W are Excludes) and
When 36.7 <a ≤ 46.7
Point G (0.0061a ² -0.9918a + 63.902, -0.0061a ² -0.0082a + 36.098,0.0),
Point I (0.0061a ² -0.9918a + 63.902, 0.0, -0.0061a ² -0.0082a + 36.098),
Point A (0.0085a ² -1.8102a + 67.1, 0.0, -0.0085a ² + 0.8102a + 32.9),
Point B (0.0, 0.0012a ² -1.1659a + 52.95, -0.0012a ² + 0.1659a + 47.05) and point W (0.0, 100.0-a, 0.0)
Within the range of the figure surrounded by the straight lines GI, IA, AB, BW and WG connecting the five points, or on the straight lines GI and AB (however, the points G, I, A, B and W are except),
Refrigerant.

(Refrigerant 3-2)
Trans-1,2-difluoroethylene (HFO-1132 (E)), trifluoroethylene (HFO-1123) and 2,3,3,3-tetrafluoro-1-propen (R1234yf) and difluoromethane (R32) It is a refrigerant that contains
In the above-mentioned refrigerant, when the mass% of HFO-1132 (E), HFO-1123, R1234yf and R32 based on the sum of these is x, y and z and a, respectively, HFO-1132 (E) and HFO. In the three-component composition diagram in which the sum of -1123 and R1234yf is (100-a) mass%, the coordinates (x, y, z) are
When 0 <a ≤ 11.1
Point J (0.0049a ² -0.9645a + 47.1, -0.0049a ² -0.0355a + 52.9, 0.0),
Point K'(0.0514a ² -2.4353a + 61.7, -0.0323a ² + 0.4122a + 5.9, -0.0191a ² + 1.0231a + 32.4),
Point B (0.0, 0.0144a ² -1.6377a + 58.7, -0.0144a ² + 0.6377a + 41.3),
Point D'(0.0, 0.0224a ² + 0.968a + 75.4, -0.0224a ² -1.968a + 24.6) and Point C (-0.2304a ² -0.4062a + 32.9, 0.2304a ² -0.5938a + 67.1, 0.0)
It is within the range of the figure surrounded by the straight lines JK', K'B, BD', D'C and CJ connecting the five points, or on the straight lines JK', K'B and D'C (however, the points J). , Excluding points B, D'and C),
When 11.1 <a ≤ 18.2
Point J (0.0243a ² -1.4161a + 49.725, -0.0243a ² + 0.4161a + 50.275, 0.0),
Point K'(0.0341a ² -2.1977a + 61.187, -0.0236a ² + 0.34a + 5.636, -0.0105a ² + 0.8577a + 33.177),
Point B (0.0, 0.0075a ² -1.5156a + 58.199, -0.0075a ² + 0.5156a + 41.801) and point W (0.0, 100.0-a, 0.0)
It is within the range of the figure surrounded by the straight lines JK', K'B, BW and WJ connecting the four points, or on the straight lines JK'and K'B (however, points J, B and W are excluded). ,
When 18.2 <a ≤ 26.7
Point J (0.0246a ² -1.4476a + 50.184, -0.0246a ² + 0.4476a + 49.816, 0.0),
Point K'(0.0196a ² -1.7863a + 58.515, -0.0079a ² -0.1136a + 8.702, -0.0117a ² + 0.8999a + 32.783),
Point B (0.0, 0.009a ² -1.6045a + 59.318, -0.009a ² + 0.6045a + 40.682) and point W (0.0, 100.0-a, 0.0)
It is within the range of the figure surrounded by the straight lines JK', K'B, BW and WJ connecting the four points, or on the straight lines JK'and K'B (however, points J, B and W are excluded). ,
When 26.7 <a ≤ 36.7
Point J (0.0183a ² -1.1399a + 46.493, -0.0183a ² + 0.1399a + 53.507, 0.0),
Point K'(-0.0051a ² + 0.0929a + 25.95, 0.0, 0.0051a ² -1.0929a + 74.05),
Point A (0.0103a ² -1.9225a + 68.793, 0.0, -0.0103a ² + 0.9225a + 31.207),
Point B (0.0, 0.0046a ² -1.41a + 57.286, -0.0046a ² + 0.41a + 42.714) and point W (0.0, 100.0-a, 0.0)
It is within the range of the figure surrounded by the straight lines JK', K'A, AB, BW and WJ connecting the five points, or on the straight lines JK', K'A and AB (however, points J, point B and points). W is excluded), and
When 36.7 <a ≤ 46.7
Point J (-0.0134a ² + 1.0956a + 7.13, 0.0134a ² -2.0956a + 92.87, 0.0),
Point K'(-1.892a + 29.443, 0.0, 0.892a + 70.557),
Point A (0.0085a ² -1.8102a + 67.1, 0.0, -0.0085a ² + 0.8102a + 32.9),
Point B (0.0, 0.0012a ² -1.1659a + 52.95, -0.0012a ² + 0.1659a + 47.05) and point W (0.0, 100.0-a, 0.0)
Within the range of the figure surrounded by the straight lines JK', K'A, AB, BW and WJ connecting the five points, or on the straight lines JK', K'A and AB (however, points J, point B and points) (Excluding W),
Refrigerant.

Refrigerant 4
(Refrigerant 4-1)
A refrigerant containing trans-1,2-difluoroethylene (HFO-1132 (E)), difluoromethane (R32) and 2,3,3,3-tetrafluoro-1-propen (R1234yf), in the refrigerant. , HFO-1132 (E), R32 and R1234yf, when the mass% based on these totals is x, y and z, respectively, the total mass of HFO-1132 (E), R32 and R1234yf is 100% by mass. In the three-component composition diagram, the coordinates (x, y, z) are
Point I (72.0, 0.0, 28.0),
Point J (48.5, 18.3, 33.2),
Point N (27.7, 18.2, 54.1) and Point E (58.3, 0.0, 41.7)
It is within the range of the figure surrounded by the line segments IJ, JN, NE, and EI that connect the four points, or on the line segment (excluding the points on the line segment EI).
The line segment IJ is
Represented in coordinates (0.0236y ² -1.7616y + 72.0, y, -0.0236y ² + 0.7616y + 28.0)
The line segment NE is
It is represented by the coordinates (0.012y ² -1.9003y + 58.3, y, -0.012y ² + 0.9003y + 41.7), and the line segments JN and EI are straight lines.
Refrigerant.

(Refrigerant 4-2)
A refrigerant containing HFO-1132 (E), R32 and R1234yf, in which the mass% of HFO-1132 (E), R32 and R1234yf based on the sum of these is defined as x, y and z, respectively. In the three-component composition diagram in which the sum of HFO-1132 (E), R32 and R1234yf is 100% by mass, the coordinates (x, y, z) are
Point M (52.6, 0.0, 47.4),
Point M'(39.2, 5.0, 55.8),
Point N (27.7, 18.2, 54.1),
Point V (11.0, 18.1, 70.9) and Point G (39.6, 0.0, 60.4)
It is within the range of the figure surrounded by the line segments MM', M'N, NV, VG, and GM that connect the five points, or on the line segment (excluding the points on the line segment GM).
The line segment MM'is
Represented in coordinates (0.132y ² -3.34y + 52.6, y, -0.132y ² + 2.34y + 47.4),
The line segment M'N is
Represented in coordinates (0.0596y ² -2.2541y + 48.98, y, -0.0596y ² +1.2541y + 51.02),
The line segment VG is
It is represented by the coordinates (0.0123y ² -1.8033y + 39.6, y, -0.0123y ² + 0.8033y + 60.4), and the line segments NV and GM are straight lines.
Refrigerant.

(Refrigerant 4-3)
A refrigerant containing HFO-1132 (E), R32 and R1234yf, in which the mass% of HFO-1132 (E), R32 and R1234yf based on the sum of these is defined as x, y and z, respectively. In the three-component composition diagram in which the sum of HFO-1132 (E), R32 and R1234yf is 100% by mass, the coordinates (x, y, z) are
Point O (22.6, 36.8, 40.6),
Point N (27.7, 18.2, 54.1) and Point U (3.9, 36.7, 59.4)
The line segment ON, which connects the three points, is within the range of the figure surrounded by NU and UO, or is on the line segment, and the line segment ON is
Represented in coordinates (0.0072y ² -0.6701y + 37.512, y, -0.0072y ² -0.3299y + 62.488)
The line segment NU is
Represented in coordinates (0.0083y ² -1.7403y + 56.635, y, -0.0083y ² + 0.7403y + 43.365), and the line segment UO is a straight line,
Refrigerant.

(Refrigerant 4-4)
A refrigerant containing HFO-1132 (E), R32 and R1234yf, in which the mass% of HFO-1132 (E), R32 and R1234yf based on the sum of these is defined as x, y and z, respectively. In the three-component composition diagram in which the sum of HFO-1132 (E), R32 and R1234yf is 100% by mass, the coordinates (x, y, z) are
Point Q (44.6, 23.0, 32.4),
Point R (25.5, 36.8, 37.7),
Point T (8.6, 51.6, 39.8),
Point L (28.9, 51.7, 19.4) and Point K (35.6, 36.8, 27.6)
It is within the range of the figure surrounded by the line segments QR, RT, TL, LK and KQ connecting the five points, or on the line segment.
The line segment QR is
Represented in coordinates (0.0099y ² -1.975y + 84.765, y, -0.0099y ² + 0.975y + 15.235)
The line segment RT is
Represented in coordinates (0.0082y ² -1.8683y + 83.126, y, -0.0082y ² + 0.8683y + 16.874)
The line segment LK is
Represented in coordinates (0.0049y ² -0.8842y + 61.488, y, -0.0049y ² -0.1158y + 38.512)
The line segment KQ is
It is represented by the coordinates (0.0095y ² -1.2222y + 67.676, y, -0.0095y ² + 0.2222y + 32.324), and the line segment TL is a straight line.
Refrigerant.

(Refrigerant 4-5)
A refrigerant containing HFO-1132 (E), R32 and R1234yf, in which the mass% of HFO-1132 (E), R32 and R1234yf based on the sum of these is defined as x, y and z, respectively. In the three-component composition diagram in which the sum of HFO-1132 (E), R32 and R1234yf is 100% by mass, the coordinates (x, y, z) are
Point P (20.5, 51.7, 27.8),
Point S (21.9, 39.7, 38.4) and Point T (8.6, 51.6, 39.8)
Within or on the line segment PS, ST, and TP that connect the three points, respectively, and the line segment PS is
Represented in coordinates (0.0064y ² -0.7103y + 40.1, y, -0.0064y ² -0.2897y + 59.9)
The line segment ST is
It is represented by the coordinates (0.0082y ² -1.8683y + 83.126, y, -0.0082y ² + 0.8683y + 16.874), and the line segment TP is a straight line.
Refrigerant.

Refrigerant 5
(Refrigerant 5-1)
A refrigerant containing CO ₂ and trans-1,2-difluoroethylene (HFO-1132 (E)), difluoromethane (R32) and 2,3,3,3-tetrafluoro-1-propen (R1234yf). ,
CO ₂ , and R32, HFO-1132 (E), and R1234yf, where the mass% based on the sum of these is w, and x, y, and z, respectively, of R32, HFO-1132 (E), and R1234yf. In the three-component composition diagram in which the sum is (100-w) mass%, the coordinates (x, y, z) are
When 0 <w ≤ 1.2
Point I (0.0, 72.0, 28.0-w)
Point J (18.3, 48.5, 33.2-w)
Point K (36.8, 35.6, 27.6-w)
Point L (51.7, 28.9, 19.4-w)
Point B'' (-1.5278w ² + 2.75w + 50.5, 0.0, 1.5278w ² -3.75w + 49.5)
Point D (-2.9167w + 40.317, 0.0, 1.9167w + 59.683)
Point C (0.0, -4.9167w + 58.317, 3.9167w + 41.683)
It is within the range of the figure surrounded by the curve IJ, the curve JK and the curve KL, and the straight line LB'', the straight line B''D, the straight line DC and the straight line CI, respectively, or on the line segment (however, the straight line). B''D and points above the straight line CI),
When 1.2 <w ≤ 4.0
Point I (0.0, 72.0, 28.0-w)
Point J (18.3, 48.5, 33.2-w)
Point K (36.8, 35.6, 27.6-w)
Point L (51.7, 28.9, 19.4-w)
Point B'' (51.6, 0.0, 48.4-w)
Point D (-2.8226w + 40.211, 0.0, 1.8226w + 59.789)
Point C (0.0, 0.1081w ² -5.169w + 58.447, -0.1081w ² + 4.169w + 41.553)
It is within the range of the figure surrounded by the curve IJ, the curve JK and the curve KL, and the straight line LB'', the straight line B''D, the straight line DC and the straight line CI, respectively, or on the line segment (however, the straight line). B''D and points above the straight line CI),
When 4.0 <w ≤ 7.0
Point I (0.0, 72.0, 28.0-w)
Point J (18.3, 48.5, 33.2-w)
Point K (36.8, 35.6, 27.6-w)
Point L (51.7, 28.9, 19.4-w)
Point B'' (51.6, 0.0, 48.4-w)
Point D (-2.8w + 40.1, 0.0, 1.8w + 59.9)
Point C (0.0, 0.0667w ² -4.9667w + 58.3, -0.0667w ² + 3.9667w + 41.7)
It is within the range of the figure surrounded by the curve IJ, the curve JK and the curve KL, and the straight line LB'', the straight line B''D, the straight line DC and the straight line CI, respectively, or on the line segment (however, the straight line). (Excluding points on B''D and straight line CI), and curve IJ is
Coordinates (x, 0.0236x ² -1.716x + 72, -0.0236x ² + 0.716x + 28-w)
Represented by
Curve JK is
Coordinates (x, 0.0095x ² -1.2222x + 67.676, -0.0095x ² + 0.2222x + 32.324-w)
Represented by
Curve KL
Coordinates (x, 0.0049x ² -0.8842x + 61.488, -0.0049x ² -0.1158x + 38.512-w)
Represented by
Refrigerant.

(Refrigerant 5-2)
A refrigerant containing CO ₂ and trans-1,2-difluoroethylene (HFO-1132 (E)), difluoromethane (R32) and 2,3,3,3-tetrafluoro-1-propen (R1234yf). ,
CO ₂ , and R32, HFO-1132 (E), and R1234yf, where the mass% based on the sum of these is w, and x, y, and z, respectively, of R32, HFO-1132 (E), and R1234yf. In the three-component composition diagram in which the sum is (100-w) mass%, the coordinates (x, y, z) are
When 0 <w ≤ 1.2
Point I (0.0, 72.0, 28.0-w)
Point J (18.3, 48.5, 33.2-w)
Point K (36.8, 35.6, 27.6-w)
Point F (-0.0833w + 36.717, -4.0833w + 5.1833, 3.1666w + 58.0997)
Point C (0.0, -4.9167w + 58.317, 3.9167w + 41.683)
It is within the range of the figure surrounded by the curve IJ and the curve JK connecting the five points of, and the straight line KF, the straight line FC and the straight line CI, or on the line segment (however, the points on the straight line CI are excluded).
When 1.2 <w ≤ 1.3
Point I (0.0, 72.0, 28.0-w)
Point J (18.3, 48.5, 33.2-w)
Point K (36.8, 35.6, 27.6-w)
Point F (36.6, -3w + 3.9, 2w + 59.5)
Point C (0.0, 0.1081w ² -5.169w + 58.447, -0.1081w ² + 4.169w + 41.553)
It is within the range of the figure surrounded by the curve IJ and the curve JK connecting the five points of, and the straight line KF, the straight line FC and the straight line CI, or on the line segment (however, the points on the straight line CI are excluded).
When 1.3 <w ≤ 4.0
Point I (0.0, 72.0, 28.0-w)
Point J (18.3, 48.5, 33.2-w)
Point K (36.8, 35.6, 27.6-w)
Point B'(36.6, 0.0, -w + 63.4)
Point D (-2.8226w + 40.211, 0.0, 1.8226w + 59.789)
Point C (0.0, 0.1081w ² -5.169w + 58.447, -0.1081w ² + 4.169w + 41.553)
It is within the range of the figure surrounded by the straight line KB', the straight line B'D, the straight line DC and the straight line CI, or on the line segment (however, the point on the straight line CI). Except),
When 4.0 <w ≤ 7.0
Point I (0.0, 72.0, 28.0-w)
Point J (18.3, 48.5, 33.2-w)
Point K (36.8, 35.6, 27.6-w)
Point B'(36.6, 0.0, -w + 63.4)
Point D (-2.8w + 40.1, 0.0, 1.8w + 59.9)
Point C (0.0, 0.0667w ² -4.9667w + 58.3, -0.0667w ² + 3.9667w + 41.7)
It is within the range of the figure surrounded by the curve IJ and the curve JK connecting the 6 points, and the straight line KB', the straight line B'D, the straight line DC and the straight line CI, or on the line segment (however, the points on the straight line CI). Except), and the curve IJ is
Coordinates (x, 0.0236x ² -1.716x + 72, -0.0236x ² + 0.716x + 28-w)
Represented by
Curve JK is
Coordinates (x, 0.0095x ² -1.2222x + 67.676, -0.0095x ² + 0.2222x + 32.324-w)
Represented by
Refrigerant.

(Refrigerant 5-3)
A refrigerant containing CO ₂ and trans-1,2-difluoroethylene (HFO-1132 (E)), difluoromethane (R32) and 2,3,3,3-tetrafluoro-1-propen (R1234yf). ,
CO ₂ , and R32, HFO-1132 (E), and R1234yf, where the mass% based on the sum of these is w, and x, y, and z, respectively, of R32, HFO-1132 (E), and R1234yf. In the three-component composition diagram in which the sum is (100-w) mass%, the coordinates (x, y, z) are
When 0 <w ≤ 1.2
Point I (0.0, 72.0, 28.0-w)
Point J (18.3, 48.5, 33.2-w)
Point E (18.2, -1.1111w ² -3.1667w + 31.9, 1.1111w ² + 2.1667w + 49.9)
Point C (0.0, -4.9167w + 58.317, 3.9167w + 41.683)
It is within the range of the figure surrounded by the curve IJ and the curve JK connecting the four points, and the straight line KF, the straight line FC and the straight line CI, or on the line segment (however, the points on the straight line CI are excluded).
When 1.2 <w ≤ 4.0
Point I (0.0, 72.0, 28.0-w)
Point J (18.3, 48.5, 33.2-w)
Point E (-0.0365w + 18.26, 0.0623w ² -4.5381w + 31.856, -0.0623w ² +3.5746w + 49.884)
Point C (0.0, 0.1081w ² -5.169w + 58.447, -0.1081w ² + 4.169w + 41.553)
It is within the range of the figure surrounded by the curve IJ and the curve JK connecting the four points, and the straight line KF, the straight line FC and the straight line CI, or on the line segment (however, the points on the straight line CI are excluded).
When 4.0 <w ≤ 7.0
Point I (0.0, 72.0, 28.0-w)
Point J (18.3, 48.5, 33.2-w) Point E (18.1, 0.0444w ² -4.3556w + 31.411, -0.0444w ² + 3.3556w + 50.489)
Point C (0.0, 0.0667w ² -4.9667w + 58.3, -0.0667w ² + 3.9667w + 41.7)
Curve IJ and curve JK connecting the four points, respectively, and within or on the line segment surrounded by the straight line KF, straight line FC and straight line CI (excluding the points on the straight line CI) and the curve IJ
Coordinates (x, 0.0236x ² -1.716x + 72, -0.0236x ² + 0.716x + 28-w)
Represented by
Refrigerant.

(Refrigerant 5-4)
A refrigerant containing CO ₂ and trans-1,2-difluoroethylene (HFO-1132 (E)), difluoromethane (R32) and 2,3,3,3-tetrafluoro-1-propen (R1234yf). ,
CO ₂ , and R32, HFO-1132 (E), and R1234yf, where the mass% based on the sum of these is w, and x, y, and z, respectively, of R32, HFO-1132 (E), and R1234yf. In the three-component composition diagram in which the sum is (100-w) mass%, the coordinates (x, y, z) are
When 0 <w ≤ 0.6
Point G (-5.8333w ² -3.1667w + 22.2, 7.0833w ² + 1.4167w + 26.2, -1.25w ² + 0.75w + 51.6)
Point O (36.8, 0.8333w ² + 1.8333w + 22.6, -0.8333w ² -2.8333w + 40.6)
Point P (51.7, 1.1111w ² + 20.5, -1.1111w ² -w + 27.8)
Point B'' (-1.5278w ² + 2.75w + 50.5, 0.0, 1.5278w ² -3.75w + 49.5)
Point D (-2.9167w + 40.317, 0.0, 1.9167w + 59.683)
It is within the range of the figure surrounded by the straight line PB'', the straight line B''D, and the straight line DG, or on the line segment (however, on the straight line B''D, as well as the curve GO and the curve OP connecting the five points. Except for the point),
When 0.6 <w ≤ 1.2
Point G (-5.8333w ² -3.1667w + 22.2, 7.0833w ² + 1.4167w + 26.2, -1.25w ² + 0.75w + 51.6)
Point N (18.2, 0.2778w ² + 3w + 27.7, -0.2778w ² -4w + 54.1)
Point O (36.8, 0.8333w ² + 1.8333w + 22.6, -0.8333w ² -2.8333w + 40.6)
Point P (51.7, 1.1111w ² + 20.5, -1.1111w ² -w + 27.8)
Point B'' (-1.5278w ² + 2.75w + 50.5, 0.0, 1.5278w ² -3.75w + 49.5)
Point D (-2.9167w + 40.317, 0.0, 1.9167w + 59.683)
It is within the range of the figure surrounded by the curve GN, the curve NO, and the curve OP, and the straight line PB'', the straight line B''D, and the straight line DG, respectively, or on the line segment (however, the straight line B''Excluding the point above D),
And the curve GO is
When 0 <w ≤ 0.6
Coordinates (x, (0.00487w ² -0.0059w + 0.0072) x ² + (-0.279w ² + 0.2844w-0.6701) x + 3.7639w ² -0.2467w + 37.512, 100-wxy)
Represented by
Curve GN
When 0.6 <w ≤ 1.2
Coordinates (x, (0.0122w ² -0.0113w + 0.0313) x ² + (-0.3582w ² + 0.1624w-1.4551) x + 2.7889w ² + 3.7417w + 43.824, 100-wxy)
Represented by
Curve NO is
When 0.6 <w ≤ 1.2
Coordinates (x, (0.00487w ² -0.0059w + 0.0072) x ² + (-0.279w ² + 0.2844w-0.6701) x + 3.7639w ² -0.2467w + 37.512, 100-wxy)
Represented by
Curve OP is
When 0 <w ≤ 1.2
Coordinates (x, (0.0074w ² -0.0133w + 0.0064) x ² + (-0.5839w ² + 1.0268w-0.7103) x + 11.472w ² -17.455w + 40.07, 100-wxy)
Represented by
When 1.2 <w ≤ 4.0
Point M (0.0, -0.3004w ² + 2.419w + 55.53, 0.3004w ² -3.419w + 44.47)
Point W (10.0, -0.3645w ² + 3.5024w + 34.422, 0.3645w ² -4.5024w + 55.578)
Point N (18.2, -0.3773w ² + 3.319w + 28.26, 0.3773w ² -4.319w + 53.54)
Point O (36.8, -0.1392w ² + 1.4381w + 24.475, 0.1392w ² -2.4381w + 38.725)
Point P (51.7, -0.2381w ² + 1.881w + 20.186, 0.2381w ² -2.881w + 28.114)
Point B'' (51.6, 0.0, -w + 48.4)
Point D (-2.8226w + 40.211, 0.0, 1.8226w + 59.789)
Point C (0.0, 0.1081w ² -5.169w + 58.447, -0.1081w ² + 4.169w + 41.553)
It is within the range of the figure surrounded by the curve MW, the curve WN, the curve NO and the curve OP, and the straight line PB ″, the straight line B''D, the straight line DC and the straight line CM, or on the line segment ( However, the points on the straight line B''D and the straight line CM are excluded), and the curve MW is
Coordinates (x, (0.0043w ² -0.0359w + 0.1509) x ² + (-0.0493w ² + 0.4669w-3.6193) x-0.3004w ² +2.419w + 55.53, 100-wxy)
Represented by
Curve WN
Coordinates (x, (0.0055w ² -0.0326w + 0.0665) x ² + (-0.1571w ² + 0.8981w-2.6274) x + 0.6555w ² -2.2153w + 54.044, 100-wxy)
Represented by
Curve NO is
Coordinates (x, (-0.00062w ² + 0.0036w + 0.0037) x ² + (0.0375w ² -0.239w-0.4977) x-0.8575w ² +6.4941w + 36.078, 100-wxy)
Represented by
Curve OP is
Coordinates (x, (-0.000463w ² + 0.0024w-0.0011) x ² + (0.0457w ² -0.2581w-0.075) x-1.355w ² +8.749w + 27.096, 100-wxy)
Represented by
When 4.0 <w ≤ 7.0
Point M (0.0, -0.0667w ² + 0.8333w + 58.133, 0.0667w ² -1.8333w + 41.867)
Point W (10.0, -0.0667w ² + 1.1w + 39.267, 0.0667w ² -2.1w + 50.733)
Point N (18.2, -0.0889w ² + 1.3778w + 31.411, 0.0889w ² -2.3778w + 50.389)
Point O (36.8, -0.0444w ² + 0.6889w + 25.956, 0.0444w ² -1.6889w + 37.244)
Point P (51.7, -0.0667w ² + 0.8333w + 21.633, 0.0667w ² -1.8333w + 26.667)
Point B'' (51.6, 0.0, -w + 48.4)
Point D (-2.8w + 40.1, 0.0, 1.8w + 59.9)
Point C (0.0, 0.0667w ² -4.9667w + 58.3, -0.0667w ² + 3.9667w + 41.7)
It is within the range of the figure surrounded by the curve MW, the curve WN, the curve NO and the curve OP, and the straight line PB ″, the straight line B''D, the straight line DC and the straight line CM, or on the line segment ( However, the points on the straight line B''D and the straight line CM are excluded), and the curve MW is
Coordinates (x, (0.00357w ² -0.0391w + 0.1756) x ² + (-0.0356w ² + 0.4178w-3.6422) x-0.0667w ² + 0.8333w + 58.103, 100-wxy)
Represented by
Curve WN
Coordinates (x, (-0.002061w ² + 0.0218w-0.0301) x ² + (0.0556w ² -0.5821w-0.1108) x-0.4158w ² + 4.7352w + 43.383, 100-wxy)
Represented by
Curve NO is
Coordinates (x, 0.0082x ² + (0.0022w ² -0.0345w-0.7521) x-0.1307w ² + 2.0247w + 42.327, 100-wxy)
Represented by
Curve OP is
Coordinates (x, (-0.0006258w ² + 0.0066w-0.0153) x ² + (0.0516w ² -0.5478w + 0.9894) x-1.074w ² + 11.651w + 10.992, 100-wxy)
Represented by
Refrigerant.

(Refrigerant 5-5)
A refrigerant containing CO ₂ and trans-1,2-difluoroethylene (HFO-1132 (E)), difluoromethane (R32) and 2,3,3,3-tetrafluoro-1-propen (R1234yf). ,
CO ₂ , and R32, HFO-1132 (E), and R1234yf, where the mass% based on the sum of these is w, and x, y, and z, respectively, of R32, HFO-1132 (E), and R1234yf. In the three-component composition diagram in which the sum is (100-w) mass%, the coordinates (x, y, z) are
When 0 <w ≤ 0.6
Point G (-5.8333w ² -3.1667w + 22.2, 7.0833w ² + 1.4167w + 26.2, -1.25w ² + 0.75w + 51.6)
Point O (36.8, 0.8333w ² + 1.8333w + 22.6, -0.8333w ² -2.8333w + 40.6)
Point F (-0.0833w + 36.717, -4.0833w + 5.1833, 3.1666w + 58.0997)
The curve GO connecting the three points of the above, and the curve GO within or on the line segment surrounded by the straight line OF and the straight line FG are
Coordinates (x, (0.00487w ² -0.0059w + 0.0072) x ² + (-0.279w ² + 0.2844w-0.6701) x + 3.7639w ² -0.2467w + 37.512, 100-wxy)
Represented by
When 0.6 <w ≤ 1.2
Point G (-5.8333w ² -3.1667w + 22.2, 7.0833w ² + 1.4167w + 26.2, -1.25w ² + 0.75w + 51.6)
Point N (18.2, 0.2778w ² + 3.0w + 27.7, -0.2.778w ² -4.0w + 54.1)
Point O (36.8, 0.8333w ² + 1.8333w + 22.6, -0.8333w ² -2.8333w + 40.6)
Point F (-0.0833w + 36.717, -4.0833w + 5.1833, 3.1666w + 58.0997)
The curve GN and the curve NO connecting the four points of the above, and the curve GN within or on the line segment surrounded by the straight line OF and the straight line FG are
When 0.6 <w ≤ 1.2
Coordinates (x, (0.0122w ² -0.0113w + 0.0313) x ² + (-0.3582w ² + 0.1624w-1.4551) x + 2.7889w ² + 3.7417w + 43.824, 100-wxy)
Represented by
Curve NO is
When 0.6 <w ≤ 1.2
Represented by coordinates (x, (0.00487w ² -0.0059w + 0.0072) x ² + (-0.279w ² + 0.2844w-0.6701) x + 3.7639w ² -0.2467w + 37.512, 100-wxy)
When 1.2 <w ≤ 1.3
Point M (0.0, -0.3004w ² + 2.419w + 55.53, 0.3004w ² -3.419w + 44.47)
Point W (10.0, -0.3645w ² + 3.5024w + 34.422, 0.3645w ² -4.5024w + 55.578)
Point N (18.2, -0.3773w ² + 3.319w + 28.26, 0.3773w ² -4.319w + 53.54)
Point O (36.8, -0.1392w ² + 1.4381w + 24.475, 0.1392w ² -2.4381w + 38.725)
Point F (36.6, -3w + 3.9, 2w + 59.5)
Point C (0.0, 0.1081w ² -5.169w + 58.447, -0.1081w ² + 4.169w + 41.553)
It is within the range of the figure surrounded by the curve MW, the curve WN and the curve NO, and the straight line OF and the straight line FC and the straight line CM, respectively, or on the line segment (excluding the points on the straight line CM). And the curve MW is
Coordinates (x, (0.0043w ² -0.0359w + 0.1509) x ² + (-0.0493w ² + 0.4669w-3.6193) x-0.3004w ² +2.419w + 55.53, 100-wxy)
Represented by
Curve WN
Coordinates (x, (0.0055w ² -0.0326w + 0.0665) x ² + (-0.1571w ² + 0.8981w-2.6274) x + 0.6555w ² -2.2153w + 54.044, 100-wxy)
Represented by
Curve NO is
Coordinates (x, (-0.00062w ² + 0.0036w + 0.0037) x ² + (0.0375w ² -0.239w-0.4977) x-0.8575w ² +6.4941w + 36.078, 100-wxy)
Represented by
When 1.3 <w ≤ 4.0
Point M (0.0, -0.3004w ² + 2.419w + 55.53, 0.3004w ² -3.419w + 44.47)
Point W (10.0, -0.3645w ² + 3.5024w + 34.422, 0.3645w ² -4.5024w + 55.578)
Point N (18.2, -0.3773w ² + 3.319w + 28.26, 0.3773w ² -4.319w + 53.54)
Point O (36.8, -0.1392w ² + 1.4381w + 24.475, 0.1392w ² -2.4381w + 38.725)
Point B'(36.6, 0.0, -w + 63.4)
Point D (-2.8226w + 40.211, 0.0, 1.8226w + 59.789)
Point C (0.0, 0.1081w ² -5.169w + 58.447, -0.1081w ² + 4.169w + 41.553)
It is within the range of the figure surrounded by the curve MW, the curve WN and the curve NO, and the straight line OB', the straight line B'D, and the straight line DC and the straight line CM, respectively, or on the line segment (however, the straight line CM). (Excluding the point above), and the curve MW is
Coordinates (x, (0.0043w ² -0.0359w + 0.1509) x ² + (-0.0493w ² + 0.4669w-3.6193) x-0.3004w ² +2.419w + 55.53, 100-wxy)
Represented by
Curve WN
Coordinates (x, (0.0055w ² -0.0326w + 0.0665) x ² + (-0.1571w ² + 0.8981w-2.6274) x + 0.6555w ² -2.2153w + 54.044, 100-wxy)
Represented by
Curve NO is
Coordinates (x, (-0.00062w ² + 0.0036w + 0.0037) x ² + (0.0375w ² -0.239w-0.4977) x + (-0.8575w ² +6.4941w + 36.078), 100-wxy)
Represented by
When 4.0 <w ≤ 7.0
Point M (0.0, -0.0667w ² + 0.8333w + 58.133, 0.0667w ² -1.8333w + 41.867)
Point W (10.0, -0.0667w ² + 1.1w + 39.267, 0.0667w ² -2.1w + 50.733)
Point N (18. 2, -0.0889w ² + 1.3778w + 31.411, 0.0889w ² -2.3778w + 50.389)
Point O (36.8, -0.0444w ² + 0.6889w + 25.956, 0.0444w ² -1.6889w + 37.244)
Point B'(36.6, 0.0, -w + 63.4)
Point D (-2.8w + 40. 1, 0.0, 1.8w + 59.9)
Point C (0.0, 0.0667w ² -4.9667w + 58.3, -0.0667w ² + 3.9667w + 41.7)
It is within the range of the figure surrounded by the curve MW, the curve WN and the curve NO, and the straight line OB', the straight line B'D, and the straight line DC and the straight line CM, respectively, or on the line segment (however, the straight line CM). (Excluding the point above), and the curve MW is
Coordinates (x, (0.00357w ² -0.0391w + 0.1756) x ² + (-0.0356w ² + 0.4178w-3.6422) x-0.0667w ² + 0.8333w + 58.103, 100-wxy)
Represented by
Curve WN
Coordinates (x, (-0.002061w ² + 0.0218w-0.0301) x ² + (0.0556w ² -0.5821w-0.1108) x-0.4158w ² + 4.7352w + 43.383, 100-wxy)
Represented by
Curve NO is
Coordinates (x, (0.0082x ² + (0.0022w ² -0.0345w-0.7521) x-0.1307w ² + 2.0247w + 42.327, 100-wxy)
Represented by
Refrigerant.

(Refrigerant 5-6)
A refrigerant containing CO ₂ and trans-1,2-difluoroethylene (HFO-1132 (E)), difluoromethane (R32) and 2,3,3,3-tetrafluoro-1-propen (R1234yf). ,
CO ₂ , and R32, HFO-1132 (E), and R1234yf, where the mass% based on the sum of these is w, and x, y, and z, respectively, of R32, HFO-1132 (E), and R1234yf. In the three-component composition diagram in which the sum is (100-w) mass%, the coordinates (x, y, z) are
When 1.2 <w ≤ 4.0
Point M (0.0, -0.3004w ² + 2.419w + 55.53, 0.3004w ² -3.419w + 44.47)
Point W (10.0, -0.3645w ² + 3.5024w + 34.422, 0.3645w ² -4.5024w + 55.578)
Point N (18.2, -0.3773w ² + 3.319w + 28.26, 0.3773w ² -4.319w + 53.54)
Point E (-0.0365w + 18.26, 0.0623w ² -4.5381w + 31.856, -0.0623w ² +3.5746w + 49.884)
Point C (0.0, 0.1081w ² -5.169w + 58.447, -0.1081w ² + 4.169w + 41.553)
The curve MW and the curve WN connecting the five points, and the curve within the range of the figure surrounded by the straight line NE, the straight line EC and the straight line CM (excluding the points on the straight line CM) and on the line segment. MW
Coordinates (x, (0.0043w ² -0.0359w + 0.1509) x ² + (-0.0493w ² + 0.4669w-3.6193) x-0.3004w ² +2.419w + 55.53, 100-wxy)
Represented by
Curve WN
Coordinates (x, (0.0055w ² -0.0326w + 0.0665) x ² + (-0.1571w ² + 0.8981w-2.6274) x + 0.6555w ² -2.2153w + 54.044, 100-wxy)
Represented by
When 4.0 <w ≤ 7.0
Point M (0.0, -0.0667w ² + 0.8333w + 58.133, 0.0667w ² -1.8333w + 41.867)
Point W (10.0, -0.0667w ² + 1.1w + 39.267, 0.0667w ² -2.1w + 50.733)
Point N (18.2, -0.0889w ² + 1.3778w + 31.411, 0.0889w ² -2.3778w + 50.389)
Point E (18.1, 0.0444w ² -4.3556w + 31.411, -0.0444w ² + 3.3556w + 50.489)
Point C (0.0, 0.0667w ² -4.9667w + 58.3, -0.0667w ² + 3.9667w + 41.7)
The curve MW and the curve WN connecting the five points, and the curve within the range of the figure surrounded by the straight line NE, the straight line EC and the straight line CM (excluding the points on the straight line CM) and on the line segment. MW
Coordinates (x, (0.00357w ² -0.0391w + 0.1756) x ² + (-0.0356w ² + 0.4178w-3.6422) x-0.0667w ² + 0.8333w + 58.103, 100-wxy)
Represented by
Curve WN
Coordinates (x, (-0.002061w ² + 0.0218w-0.0301) x ² + (0.0556w ² -0.5821w-0.1108) x-0.4158w ² + 4.7352w + 43.383, 100-wxy)
Represented by
Refrigerant.

Refrigerant 6
(Refrigerant 6-1)
Includes trans-1,2-difluoroethylene (HFO-1132 (E)), trifluoroethylene (HFO-1123) and difluoromethane (R32)
In the above-mentioned refrigerant, when the mass% of HFO-1132 (E), HFO-1123 and R32 based on the sum of these is x, y and z, respectively, HFO-1132 (E), HFO-1123 and R32 In the three-component composition diagram in which the sum of is 100% by mass, the coordinates (x, y, z) are
Point I (72.0, 28,0, 0.0)
Point K (48.4, 33.2, 18.4)
Point B'(0.0, 81.6, 18.4)
Point H (0.0, 86.1, 13.9)
Point R (20.6, 69.9, 9.5) and Point G (38.5, 61.5, 0.0)
Within the range of the figure surrounded by the line segments IK, KB', B'H, HR, RG and GI connecting the six points, or on the line segment (however, the points on the line segments B'H and GI are except),
The line segment IK is
Coordinates (0.025z ² -1.7429z + 72.00, -0.025z ² + 0.7429z + 28.0, z)
Represented by
The line segment HR is
Coordinates (-0.6198z ² + 9.8223z-16.772, 0.6198z ² -10.8223z + 116.772, z)
Represented by
The line segment RG is
Coordinates (-0.072z ² -1.1998z + 38.5, 0.072z ² + 0.1998z + 61.5, z)
And the line segments KB'and GI are straight lines.
Refrigerant.

(Refrigerant 6-2)
Including HFO-1132 (E), HFO-1123 and R32
In the above-mentioned refrigerant, when the mass% of HFO-1132 (E), HFO-1123 and R32 based on the sum of these is x, y and z, respectively, HFO-1132 (E), HFO-1123 and R32 In the three-component composition diagram in which the sum of is 100% by mass, the coordinates (x, y, z) are
Point I (72.0, 28,0, 0.0)
Point J (57.7, 32.8, 9.5)
Point R (20.6, 69.9, 9.5) and Point G (38.5, 61.5, 0.0)
It is within the range of the figure surrounded by the line segments IJ, JR, RG and GI connecting the four points, or on the line segment (excluding the points on the line segment GI).
The line segment IJ is
Coordinates (0.025z ² -1.71429z + 72.0, -0.025z ² + 0.71429z + 28.0, z)
The line segment RG is represented by
Coordinates (-0.072z ² -1.1998z + 38.5, 0.072z ² + 0.1998z + 61.5, z)
Represented by
The line segments JR and GI are straight lines,
Refrigerant.

(Refrigerant 6-3)
Including HFO-1132 (E), HFO-1123 and R32
In the above-mentioned refrigerant, when the mass% of HFO-1132 (E), HFO-1123 and R32 based on the sum of these is x, y and z, respectively, HFO-1132 (E), HFO-1123 and R32 In the three-component composition diagram in which the sum of is 100% by mass, the coordinates (x, y, z) are
Point M (47.1, 52.9, 0.0)
Point P (31.8, 49.8, 18.4)
Point B'(0.0, 81.6, 18.4)
Point H (0.0, 86.1, 13.9)
Point R (20.6, 69.9, 9.5) and Point G (38.5, 61.5, 0.0)
Within or on the line segment surrounded by the line segments MP, PB', B'H, HR, RG and GM connecting the 6 points, respectively (however, the points on the line segments B'H and GM are except),
The line segment MP is
Coordinates (0.0083z ² -0.984z + 47.1, -0.0083z ² -0.016z + 52.9, z)
Represented by
The line segment HR is
Coordinates (-0.6198z ² + 9.8223z-16.772, 0.6198z ² -10.8223z + 116.772, z)
Represented by
The line segment RG is
Coordinates (-0.072z ² -1.1998z + 38.5, 0.072z ² + 0.1998z + 61.5, z)
And the line segments PB'and GM are straight lines.
Refrigerant.

(Refrigerant 6-4)
Including HFO-1132 (E), HFO-1123 and R32
In the above-mentioned refrigerant, when the mass% of HFO-1132 (E), HFO-1123 and R32 based on the sum of these is x, y and z, respectively, HFO-1132 (E), HFO-1123 and R32 In the three-component composition diagram in which the sum of is 100% by mass, the coordinates (x, y, z) are
Point M (47.1, 52.9, 0.0)
Point N (38.5, 52.0, 9.5)
Point R (20.6, 69.9, 9.5) and Point G (38.5, 61.5, 0.0)
It is within the range of the figure surrounded by the line segments MN, NR, RG and GM connecting the four points, or on the line segment (excluding the points on the line segment GM).
The line segment MN is
Coordinates (0.0083z ² -0.984z + 47.1, -0.0083z ² -0.016z + 52.9, z)
The line segment RG is represented by
Coordinates (-0.072z ² -1.1998z + 38.5, 0.072z ² + 0.1998z + 61.5, z)
Represented by
The line segments NR and GM are straight lines.
Refrigerant.

(Refrigerant 6-5)
Including HFO-1132 (E), HFO-1123 and R32
In the above-mentioned refrigerant, when the mass% of HFO-1132 (E), HFO-1123 and R32 based on the sum of these is x, y and z, respectively, HFO-1132 (E), HFO-1123 and R32 In the three-component composition diagram in which the sum of is 100% by mass, the coordinates (x, y, z) are
Point P (31.8, 49.8, 18.4)
Point S (24.9, 56.7, 18.4) and Point T (35.0, 51.1, 13.9)
It is within the range of the figure surrounded by the line segments PS, ST and TP connecting the three points, or on the line segment, and the line segment ST is
Coordinates (-0.0632z ² -0.2026z + 50.03, 0.0632z ² -0.7974z + 49.97, z)
The line segment TP is represented by
Coordinates (0.0083z ² -0.984z + 47.1, -0.0083z ² -0.016z + 52.9, z)
Represented by
The line segment PS is a straight line,
Refrigerant.

(Refrigerant 6-6)
Including HFO-1132 (E), HFO-1123 and R32
In the above-mentioned refrigerant, when the mass% of HFO-1132 (E), HFO-1123 and R32 based on the sum of these is x, y and z, respectively, HFO-1132 (E), HFO-1123 and R32 In the three-component composition diagram in which the sum of is 100% by mass, the coordinates (x, y, z) are
Point Q (29.5, 33.5, 37.0)
Point B'' (0.0, 63.0, 37.0)
Point D (0.0, 67.0, 33.0) and Point U (28.9, 42.6, 28.5)
It is within the range of the figure surrounded by the line segments QB'', B''D, DU and UQ connecting the four points, or on the line segment (excluding the points on the line segment B''D).
The line segment DU is
Coordinates (0.0066z ² -1.0349z + 67.0, -0.0066z ² + 0.0349z + 33.0)
The line segment UQ is represented by
Coordinates (0.0192z ² -1.1891z + 47.168, -0.0192z ² + 0.1891z + 52.832, z)
Represented by
The line segments QB'' and B''D are straight lines,
Refrigerant.
Refrigerant 7
(Refrigerant 7-1)
Containing trans-1,2-difluoroethylene (HFO-1132 (E)) and 2,3,3,3-tetrafluoropropene (HFO-1234yf),
For the total mass of HFO-1132 (E) and HFO-1234yf
The content ratio of HFO-1132 (E) is 35.0 to 65.0% by mass,
The content of HFO-1234yf is 65.0 to 35.0% by mass.
Refrigerant.
The above-mentioned refrigerant can be suitably used for operating a refrigeration cycle in which the evaporation temperature is −75 to -5 ° C.
Further, the above-mentioned refrigerant is used with respect to the total mass of HFO-1132 (E) and HFO-1234yf.
The content ratio of HFO-1132 (E) is 41.3 to 53.5% by mass,
The content of HFO-1234yf is 58.7-46.5% by mass,
It can be a refrigerant.
Further, the refrigerant can be a refrigerant composed only of HFO-1132 (E) and HFO-1234yf.
(Refrigerant 7-2)
Containing trans-1,2-difluoroethylene (HFO-1132 (E)) and 2,3,3,3-tetrafluoropropene (HFO-1234yf),
For the total mass of HFO-1132 (E) and HFO-1234yf
The content ratio of HFO-1132 (E) is 40.5-49.2% by mass,
The content of HFO-1234yf is 59.5 to 50.8% by mass.
Refrigerant.
The above-mentioned refrigerant can be a refrigerant consisting only of HFO-1132 (E) and HFO-1234yf.
In addition, the above-mentioned refrigerant can be suitably used for operating a refrigeration cycle in which the evaporation temperature is −75 to 15 ° C.
Further, the above-mentioned refrigerants are R12, R22, R134a, R404A, R407A, R407C, R407F, R407H, R410A, R413A, R417A, R422A, R422B, R422C, R422D, R423A, R424A, R426A, R427A, R430A, R434A, R437A, It can be used as an alternative refrigerant for R438A, R448A, R449A, R449B, R449C, R452A, R452B, R454A, R454B, R454C, R455A, R465A, R502, R507 or R513A.
(Refrigerant 7-3)
Containing trans-1,2-difluoroethylene (HFO-1132 (E)) and 2,3,3,3-tetrafluoropropene (HFO-1234yf),
For the total mass of HFO-1132 (E) and HFO-1234yf
The content ratio of HFO-1132 (E) is 31.1 to 39.8% by mass,
The content of HFO-1234yf is 68.9 to 60.2% by mass,
Refrigerant.
The above refrigerant is used with respect to the total mass of HFO-1132 (E) and HFO-1234yf.
The content ratio of HFO-1132 (E) is 31.1 to 37.9% by mass,
The content of HFO-1234yf is 68.9 to 62.1% by mass.
It can be a refrigerant.
Further, the above-mentioned refrigerant can be a refrigerant composed only of HFO-1132 (E) and HFO-1234yf.
In addition, the above-mentioned refrigerant can be suitably used for operating a refrigeration cycle in which the evaporation temperature is −75 to 15 ° C.
Further, the above-mentioned refrigerant can be an alternative refrigerant for R134a, R1234yf or CO ₂ .
(Refrigerant 7-4)
Containing trans-1,2-difluoroethylene (HFO-1132 (E)) and 2,3,3,3-tetrafluoropropene (HFO-1234yf),
For the total mass of HFO-1132 (E) and HFO-1234yf
The content ratio of HFO-1132 (E) is 21.0 to 28.4% by mass,
The content of HFO-1234yf is 79.0 to 71.6% by mass.
Refrigerant.
The above-mentioned refrigerant can be a refrigerant consisting only of HFO-1132 (E) and HFO-1234yf.
The above refrigerants are R12, R22, R134a, R404A, R407A, R407C, R407F, R407H, R410A, R413A, R417A, R422A, R422B, R422C, R422D, R423A, R424A, R426A, R427A, R430A, R434A, R437A, It can be used as an alternative refrigerant for R438A, R448A, R449A, R449B, R449C, R452A, R452B, R454A, R454B, R454C, R455A, R465A, R502, R507, R513A, R1234yf or R1234ze.
(Refrigerant 7-5)
Containing trans-1,2-difluoroethylene (HFO-1132 (E)) and 2,3,3,3-tetrafluoropropene (HFO-1234yf),
For the total mass of HFO-1132 (E) and HFO-1234yf
The content ratio of HFO-1132 (E) is 12.1 to 72.0% by mass,
The content of HFO-1234yf is 87.9 to 28.0% by mass.
Refrigerant.
The refrigerant can be a refrigerant used in an in-vehicle air-conditioning device, and examples of the air-conditioning device include a gasoline vehicle, a hybrid vehicle, an electric vehicle, and a hydrogen vehicle.
Further, the above-mentioned refrigerant can be a refrigerant composed only of HFO-1132 (E) and HFO-1234yf.
Further, the refrigerant can be an alternative refrigerant for R12, R134a or R1234yf.

[Disproportionation inhibitor]
The working medium for the refrigeration cycle according to the present disclosure uses a haloalkane having 1 or 2 carbon atoms and excluding the case where all halogen atoms are fluorine, as the disproportionation inhibitor for suppressing the disproportionation reaction of R1132 described above. There is. By using the disproportionation inhibitor, it becomes possible to suppress the disproportionation reaction of R1132 or alleviate the progress.

The haloalkane (halogenated alkane) used as the disproportionation inhibitor in the present disclosure may be any one having 1 or 2 carbon atoms and excluding the case where all the halogen atoms are fluorine. More specifically, haloalkane having 2 carbon atoms, that is, haloethane (halogenated ethane) and haloalkane having 1 carbon atom, that is, halomethane (halogenated methane) can be mentioned. As the disproportionation inhibitor, either haloethane or halomethane may be used, or both haloethane and halomethane may be used in combination.

Specifically, the haloethane among the haloalkanes used as the disproportionation inhibitor may have the structure of the following formula (1) (except when X is only F).

C ₂ H _m X _n ... (1)
(However, X in the formula (1) is a halogen atom selected from the group consisting of F, Cl, Br, and I, m is an integer of 0 or more, n is an integer of 1 or more, and further. The sum of m and n is 6, and when n is 2 or more, X is the same or different kind of halogen atom.) That is, the haloethane shown in the formula (1) is the monohaloethane shown in the following formula (11), and the following. Dihaloethane represented by the following formula (12), trihaloethane represented by the following formula (13), tetrahaloethane represented by the following formula (14), pentahaloethane represented by the following formula (15), and hexahaloethane represented by the following formula (16). It may be at least one of. ^X 1 in haloethane shown in these formulas ^{(11) ~ (16),} X 2, X 3, X 4, X 5, and ^{X 6} represents a halogen atom independently. Therefore, X ^{1 to} X ⁶ may be different types of halogen atoms from each other, at least two or more of them may be of the same type and the other may be of different types of halogen atoms, or all of them may be of the same type. It may be a halogen atom.

CH ₂ X ¹ CH ₃ ... (11)
CHX ¹ X ₂ CH ₃ ... (12)
CX ¹ X ² X ³ CH ₃ ... (13)
CX ¹ X ² X ³ CH ₂ X ⁴ ... (14)
CX ¹ X ² X ³ CHX ⁴ X ⁵ ... (15)
CX ¹ X ² X ³ CX ⁴ X ⁵ X ⁶ ... (16)
However, from the haloethane represented by the above formula (1), those in which X is composed only of F are excluded. This is because haloethane in which X is composed only of F is a compound that can be used in combination as another refrigerant component as described above, and does not substantially function as a disproportionation inhibitor.

In the haloethane represented by the formula (1), the halogen atom X may be at least one of F, Cl, Br, and I as described above, but it is preferably at least one of F and I. .. When the haloethane represented by the formula (1) contains Cl and / or Br, the ozone depletion potential (ODP) tends to be high, which may limit availability or handleability. Alternatively, regardless of the type of logogen atom X, the haloethane represented by the formula (1) includes a compound having a relatively large ozone depletion potential (ODP) and / or global warming potential (GWP).

However, as will be described later, in the working medium for refrigeration cycle according to the present disclosure, even if the amount of haloethane added as the disproportionation inhibitor is small, the disproportionation reaction of R1132 can be effectively suppressed or not. The rapid progress of the leveling reaction can be alleviated. Further, even when another disproportionation inhibitor described later is used in combination, the total amount of the disproportionation inhibitor added is sufficiently smaller than that of the refrigerant component. Therefore, even if haloethane having a relatively large ODP or GWP is used, it does not have a significant effect on the environment.

The specific haloethane represented by the formula (1) is not particularly limited, and for example, 1,1,1-trifluoro-2-iodoethane (CF ₃ CH ₂ I), monoiodoethane (CH ₃ CH ₂ I), mono. Bromoethane (CH ₃ CH ₂ Br), 1,1,1-triiodoethane (CH ₃ CI ₃ ) and the like can be mentioned. Only one type of these haloethanes may be used, or two or more types may be appropriately combined and used. Among these, 1,1,1-trifluoro-2-iodoethane (CF ₃ CH ₂ I) can be particularly preferably used in consideration of availability, ODP value, handleability and the like.

Of the haloalkanes used as the disproportionation inhibitor, halomethane may specifically have the structure of the following formula (2) (except when X is F only).

CH _p X _q ... (2)
(However, X in the formula (2) is a halogen atom selected from the group consisting of F, Cl, Br, and I, p is an integer of 0 or more, q is an integer of 1 or more, and further. The sum of p and q is 4, and when q is 2 or more, X is the same or different type of halogen atom.) That is, the halomethane represented by the formula (2) is the monohalomethane represented by the following formula (21), and then It may be at least one of the dihalomethane represented by the formula (22), the trihalomethane represented by the following formula (23), and the tetrahalomethane represented by the following formula (24). In halomethane represented by these formulas (21) to (24), X ¹ , X ² , X ³ and X ⁴ each independently represent one halogen atom. Therefore, X ^{1 to} X ⁴ may be different types of halogen atoms from each other, at least two or more of them may be of the same type and the other may be of different types of halogen atoms, or all of them may be of the same type. It may be a halogen atom.

CH ₃ X ¹ ... (21)
CH ₂ X ¹ X ² ... (22)
CHX ¹ X ² X ³ ... (23)
CX ¹ X ² X ³ X ⁴ ... (24)
However, from the halomethane represented by the above formula (2), those in which X is composed only of F are excluded. This is because halomethane in which X is composed only of F is a compound that can be used in combination as another refrigerant component as described above, and does not substantially function as a disproportionation inhibitor.

Specific examples of the halomethane represented by the formula (2) include (mono) iodomethane (CH ₃ I), diiodomethane (CH ₂ I ₂ ), dibromomethane (CH ₂ Br ₂ ), and dichloromethane (CH ₃ Br). , Dichloromethane (CH ₂ Cl ₂ ), Chloroiodomethane (CH ₂ ClI), Dibromochloromethane (CHBr ₂ Cl), Methane tetraiodide (CI ₄ ), Carbon tetrabromide (CBr ₄ ), Bromotrichloromethane (CBrCl) ₃ ), Dibromodichloromethane (CBr ₂ Cl ₂ ), Tribromofluoromethane (CBr ₃ F), Fluorodiiodomethane (CHFI ₂ ), Difluorodiiodomethane (CF ₂ I ₂ ), Dibromodifluoromethane (CBr ₂ F ₂₎ ), Trifluoroiodomethane (CF ₃ I) and the like, but are not particularly limited. Only one type of these halomethanes may be used, or two or more types may be appropriately combined and used.

Among these, as more preferable halomethane, for example, those in which bromine is contained in halogen atom X can be mentioned, and as more preferable halomethane, dibromomethane (CH ₂ Br ₂ ) and bromomethane (CH ₃ Br) can be mentioned. , Dibromomethane (CBr ₂ Cl ₂ ), trifluoroiodomethane (CF ₃ I) and the like, and as a particularly preferable halomethane, trifluoroiodomethane (CF ₃ I) can be mentioned.

[Content of disproportionation inhibitor]
Next, the content (addition amount) of the above-mentioned disproportionation inhibitor will be specifically described. In the working medium for the refrigeration cycle according to the present disclosure, as described above, the haloalkane is used as the disproportionation inhibitor, and haloethane and / or halomethane can be used.

As explained in the content of the refrigerant component, when the total amount of the refrigerant-related components (the total amount of the refrigerant component and the disproportionation inhibitor) is 100% by mass, the upper limit of the addition amount (content) of the disproportionation inhibitor Is not particularly limited, but may be 10% by mass or less of the total amount of the refrigerant-related components, preferably 5% by mass or less, and more preferably 3% by mass or less. This is because when the content of the disproportionation inhibitor exceeds 10% by mass of the total amount of the refrigerant-related components, the content of the disproportionation inhibitor becomes too large when viewed as a working medium for a refrigeration cycle. This is because there is a possibility that good physical properties cannot be exhibited as a "refrigerant". Of course, it goes without saying that 10% by mass or more of the total amount of the refrigerant-related components may be added depending on the composition of the working medium for the refrigeration cycle.

Further, the lower limit of the content of the disproportionation inhibitor is not particularly limited, but as a typical lower limit, 1.2% by mass or more of the total amount of the refrigerant-related components can be mentioned. Even if the total amount of haloalkane is less than 1.2% by mass, it is possible to obtain the effect of suppressing the disproportionation reaction, but if it is 1.2% by mass or more, the disproportionation reaction is suppressed. The effect of can be more preferably realized. Therefore, in the present disclosure, a more preferable range of the content of the disproportionation inhibitor can be mentioned in the range of 1.2% by mass or more and 3% by mass or less of the total amount of the refrigerant-related components.

In general, in the working medium for a refrigeration cycle, impurities contained in the refrigerant component are often 2 to 3% by mass or less. For example, the purity of commercially available R1132 is known to be about 97% by mass, and as impurities, the remainder of the synthetic raw material or by-products are contained in an amount of less than 3% by mass. The disproportionation inhibitor in the present disclosure can effectively suppress the disproportionation reaction or alleviate the progress even if haloalkane is added to R1132 at an impurity level (3% by mass or less). Therefore, the amount of the disproportionation inhibitor added cannot always be specified, and the above-mentioned upper limit value, lower limit value, and the like are typical preferable examples until they get tired of it.

[Other ingredients that can be used together]
Since the working medium for the refrigeration cycle according to the present disclosure is used in the refrigeration cycle system, it can be used in combination with the lubricating oil (refrigerator oil) for lubricating the compressor provided in the refrigeration cycle system. As described above, the working medium for a refrigeration cycle according to the present disclosure is composed of at least a refrigerant component containing R1132 as a "main component" and a disproportionation inhibitor composed of the above-mentioned haloalkane. Just do it. Further, when the working medium for the refrigeration cycle is used in combination with the lubricating oil, it can be considered that the working medium-containing composition is composed of the refrigerant component, the disproportionation inhibitor, the lubricating oil component, and other components. it can.

In the working medium for refrigeration cycle according to the present disclosure, the disproportionation inhibitor may be mixed with the refrigerant component or may be mixed with the lubricating oil component. Since the disproportionation inhibitor halomethane is usually a gas at normal temperature and pressure, it may be mixed with the refrigerant component. On the other hand, since haloethane is usually a liquid at normal temperature and pressure, the vapor phase portion of haloethane existing at the vapor pressure may be mixed with the refrigerant component, and the liquid phase portion may be mixed with the lubricating oil component. Good. Even when a liquid halomethane is used at normal temperature and pressure, the liquid phase portion may be mixed with the lubricating oil component in the same manner as halomethane.

As the lubricating oil component contained in the working medium-containing composition (used together with the working medium for the refrigeration cycle), various lubricating oils known in the refrigeration cycle system can be preferably used. Specific examples of the lubricating oil include ester-based lubricating oils, ether-based lubricating oils, glycol-based lubricating oils, alkylbenzene-based lubricating oils, fluorine-based lubricating oils, mineral oils, hydrocarbon-based synthetic oils, and the like. Not limited. Only one type of these lubricating oils may be used, or two or more types may be appropriately combined and used.

In addition, various known additives other than the disproportionation inhibitor may be added to the working medium-containing composition. Specific examples of the additive include, but are not limited to, an antioxidant, a moisture scavenger, a metal inactivating agent, an anti-wear agent, an antifoaming agent, and the like. Antioxidants are used to improve the thermal stability, oxidation resistance, chemical stability, etc. of the refrigerant component or lubricating oil. Moisture scavengers are used to remove water when it has entered the refrigeration cycle system, and in particular to suppress changes in the properties of the lubricating oil. The metal inactivating agent is used to suppress or prevent a chemical reaction caused by the catalytic action of a metal component. The anti-wear agent is used to reduce wear on sliding parts in the compressor, especially during high pressure operation. The defoaming agent is used especially for suppressing the generation of air bubbles in the lubricating oil.

The specific types of these additives are not particularly limited, and known compounds and the like can be preferably used depending on various conditions. Further, as these additives, only one kind of compound or the like may be used, or two or more kinds of compounds or the like may be appropriately combined and used. Further, the amount of these additives added is not particularly limited, and they should be added within a known range as long as the properties of the working medium for refrigeration cycle according to the present disclosure or the working medium-containing composition containing the same are not impaired. Can be done.

[Configuration example of refrigeration cycle system]
Next, an example of a refrigeration cycle system configured by using the refrigeration cycle working medium according to the present disclosure will be described with reference to FIGS. 1 (A) and 1 (B).

The specific configuration of the refrigeration cycle system according to the present disclosure is not particularly limited, and any component such as a compressor, a condenser, an expansion means, and an evaporator may be connected by piping. Specific application examples of the refrigeration cycle system according to the present disclosure are also not particularly limited, and for example, an air conditioner (air conditioner), a refrigerator (household or commercial use), a dehumidifier, a showcase, an ice maker, and a heat pump type hot water supply. Machines, heat pump type washer-dryers, vending machines, etc. can be mentioned.

An air conditioner will be described as a typical application example of the refrigeration cycle system according to the present disclosure. Specifically, as schematically shown in the block diagram of FIG. 1A, the air conditioner 10 according to the present embodiment includes an indoor unit 11, an outdoor unit 12, and a pipe 13 connecting them. The indoor unit 11 includes a heat exchanger 14, and the outdoor unit 12 includes a heat exchanger 15, a compressor 16, and a decompression device 17.

The heat exchanger 14 of the indoor unit 11 and the heat exchanger 15 of the outdoor unit 12 are connected in an annular shape by a pipe 13, whereby a refrigeration cycle is formed. Specifically, the heat exchanger 14 of the indoor unit 11, the compressor 16, the heat exchanger 15 of the outdoor unit 12, and the decompression device 17 are connected in an annular shape by the pipe 13 in this order. Further, a four-way valve 18 for switching heating / cooling is provided in the pipe 13 connecting the heat exchanger 14, the compressor 16, and the heat exchanger 15. The indoor unit 11 includes a blower fan, a temperature sensor, an operation unit and the like (not shown), and the outdoor unit 12 includes a blower, an accumulator and the like (not shown). Further, the pipe 13 is provided with various valve devices (including a four-way valve 18), a strainer, and the like (not shown).

The heat exchanger 14 included in the indoor unit 11 exchanges heat between the indoor air sucked into the indoor unit 11 by the blower fan and the refrigerant flowing inside the heat exchanger 14. The indoor unit 11 blows air warmed by heat exchange into the room during heating, and blows air cooled by heat exchange into the room during cooling. The heat exchanger 15 included in the outdoor unit 12 exchanges heat between the outside air sucked into the outdoor unit 12 by the blower and the refrigerant flowing inside the heat exchanger 15.

The specific configuration of the indoor unit 11 and the outdoor unit 12, the heat exchanger 14, the heat exchanger 15, the compressor 16, the decompression device 17, the four-way valve 18, the blower fan, the temperature sensor, the operation unit, the blower, The specific configuration of the accumulator, other valve device, strainer, etc. is not particularly limited, and a known configuration can be preferably used.

An example of the operation of the air conditioner 10 shown in FIG. 1A will be specifically described. First, in the cooling operation or the dehumidifying operation, the compressor 16 of the outdoor unit 12 compresses and discharges the gas refrigerant, whereby the gas refrigerant is sent to the heat exchanger 15 of the outdoor unit 12 via the four-way valve 18. Since the heat exchanger 15 exchanges heat between the outside air and the gas refrigerant, the gas refrigerant condenses and liquefies. The liquefied liquid refrigerant is decompressed by the decompression device 17 and sent to the heat exchanger 14 of the indoor unit 11. In the heat exchanger 14, the liquid refrigerant evaporates to become a gas refrigerant by heat exchange with the indoor air. This gas refrigerant returns to the compressor 16 of the outdoor unit 12 via the four-way valve 18. The compressor 16 compresses the gas refrigerant and discharges it to the heat exchanger 15 again via the four-way valve 18.

Further, in the heating operation, the compressor 16 of the outdoor unit 12 compresses and discharges the gas refrigerant, whereby the gas refrigerant is sent to the heat exchanger 14 of the indoor unit 11 via the four-way valve 18. In the heat exchanger 14, the gas refrigerant is condensed and liquefied by heat exchange with the indoor air. The liquefied liquid refrigerant is decompressed by the decompression device 17 to become a gas-liquid two-phase refrigerant, which is sent to the heat exchanger 15 of the outdoor unit 12. Since the heat exchanger 15 exchanges heat between the outside air and the gas-liquid two-phase refrigerant, the gas-liquid two-phase refrigerant evaporates to become a gas refrigerant and returns to the compressor 16. The compressor 16 compresses the gas refrigerant and discharges it to the heat exchanger 14 of the indoor unit 11 again via the four-way valve 18.

Further, as another typical application example of the refrigeration cycle system according to the present disclosure, a refrigerator will be described as an example. Specifically, for example, as schematically shown in the block diagram of FIG. 1 (B), the refrigerator 20 according to the present embodiment includes the compressor 21, the condenser 22, the decompression device 23, and the evaporation shown in FIG. It is equipped with a vessel 24, a pipe 25, and the like. Although not shown, the refrigerator 20 also includes a housing as a main body, a blower, an operation unit, a control unit, and the like.

The compressor 21 compresses the refrigerant gas into a high-temperature and high-pressure gas refrigerant. The condenser 22 cools and liquefies the refrigerant. The decompression device 23 is composed of, for example, a capillary tube, and decompresses the liquefied refrigerant (liquid refrigerant). The evaporator 24 evaporates the refrigerant into a low-temperature low-pressure gas refrigerant. The compressor 21, the condenser 22, the decompression device 23, and the evaporator 24 are connected in a ring shape in this order by a pipe 25 for circulating the refrigerant gas, thereby forming a refrigeration cycle.

The configurations of the compressor 21, the condenser 22, the decompression device 23, the evaporator 24, the piping 25, the main body housing, the blower, the operation unit, the control unit, and the like are not particularly limited, and known configurations can be preferably used. it can. Further, the refrigerator 20 may have a known configuration other than these.

An example of the operation of the refrigerator 20 shown in FIG. 1B will be specifically described. The compressor 21 compresses the gas refrigerant and discharges it to the condenser 22. The condenser 22 cools the gas refrigerant into a liquid refrigerant. The liquid refrigerant is depressurized by passing through the decompression device 23 and sent to the evaporator 24. In the evaporator 24, the liquid refrigerant takes heat from the surroundings and vaporizes, becomes a gas refrigerant, and returns to the compressor 21. The compressor 21 compresses the gas refrigerant and discharges it to the condenser 22 again.

Such an air conditioner 10 or a refrigerator 20 is a refrigeration cycle system configured by using the above-mentioned refrigeration cycle operating medium. R1132 (particularly R1132 (E)) used as a working medium for a refrigeration cycle has good properties as a refrigerant component and has a small ODP and GWP. Therefore, it is possible to realize an efficient refrigeration cycle system while reducing the impact on the environment.

Moreover, the working medium for the refrigeration cycle according to the present disclosure uses R1132 as a refrigerant component and contains a haloalkane as an disproportionation inhibitor except for the case where the number of carbon atoms is 1 or 2 and the halogen atoms are all fluorine. ing. Therefore, even if heat is generated during the refrigeration cycle operation, the occurrence of a chain disproportionation reaction of R1132 can be avoided, suppressed, or mitigated. As a result, the generation of soot due to the chain disproportionation reaction can be effectively avoided, so that the reliability of the working medium for the refrigeration cycle and the refrigeration cycle system using the same can be improved.

The present disclosure will be described in more detail based on Examples and Comparative Examples, but the present disclosure is not limited thereto. One of ordinary skill in the art can make various changes, modifications, and modifications without departing from the scope of the present disclosure.

(Experimental system of disproportionation reaction)
The autolysis property was evaluated by conducting an experiment using equipment conforming to Method A, which is recommended as equipment for measuring the combustion range in a gas mixed with halogen in the individual notification under the High Pressure Gas Safety Act. ..

Specifically, the following refrigerant components are sealed to a predetermined pressure in a spherical pressure-resistant container having an internal volume of 50 cm ³ controlled to a predetermined temperature from the outside, and then the platinum wire installed inside is blown. An energy of about 30 J was applied. The presence or absence of autolysis reaction was confirmed by measuring the temperature and pressure changes in the pressure-resistant container generated after the application. Those having a pressure difference of 1 MPaG or more and a temperature difference of 10 ° C. or more before and after ignition were judged to have a disproportionation reaction.

(Comparative Example 1)
In the experimental system, R1132 (E) was introduced into the pressure-resistant container from the gas cylinder. At this time, the internal pressure (pressure of R1132 (E)) was 1.3 MPa, and the internal temperature was about 25 ° C.

When an energy of about 30 J was applied to induce the disproportionation reaction of R1132 (E), an internal pressure of 10 MPa and an internal temperature of about 200 ° C. were measured. After that, when the inside of the pressure-resistant container was checked after the internal pressure and the internal temperature were sufficiently lowered, it was confirmed that a considerable amount of soot was generated.

(Example 1)
In the above experimental system, R1132 (E) was introduced into the pressure-resistant container from the gas cylinder, and dibromomethane was added as an disproportionation inhibitor in an amount of 5% by mass. At this time, the internal pressure (R1132 (E) and the pressure of the disproportionation inhibitor) was 1.3 MPa, and the internal temperature was about 25 ° C.

When an energy of about 30 J was applied to induce the disproportionation reaction of R1132 (E), no significant increase or decrease in temperature was observed. After that, the inside of the pressure-resistant container was checked after the internal pressure and the internal temperature were sufficiently lowered, but no soot was generated.

(Example 2)
In the above experimental system, R1132 (E) was introduced into the pressure-resistant container from the gas cylinder, and dibromodichloromethane was added as an disproportionation inhibitor in an amount of 3% by mass. At this time, the internal pressure (R1132 (E) and the pressure of the disproportionation inhibitor) was 1.3 MPa, and the internal temperature was about 25 ° C.

When an energy of about 30 J was applied to induce the disproportionation reaction of R1132 (E), no significant increase or decrease in temperature was observed. After that, the inside of the pressure-resistant container was checked after the internal pressure and the internal temperature were sufficiently lowered, but no soot was generated.

(Example 3)
In the above experimental system, R1132 (E) was introduced into the pressure-resistant container from the gas cylinder, and trifluoroiodomethane was added as a disproportionation inhibitor in an amount of 3% by mass. At this time, the internal pressure (R1132 (E) and the pressure of the disproportionation inhibitor) was 1.3 MPa, and the internal temperature was about 25 ° C.

When an energy of about 30 J was applied to induce the disproportionation reaction of R1132 (E), no significant increase or decrease in temperature was observed. After that, the inside of the pressure-resistant container was checked after the internal pressure and the internal temperature were sufficiently lowered, but no soot was generated.

(Example 4)
In the above experimental system, R1132 (E) was introduced into the pressure-resistant container from the gas cylinder, and 1,1,1-trifluoro-2-iodoethane was added as an disproportionation inhibitor in an amount of 1% by mass. Was added. At this time, the internal pressure (R1132 (E) and the pressure of the disproportionation inhibitor) was 1.3 MPa, and the internal temperature was about 25 ° C.

When an energy of about 30 J was applied to induce the disproportionation reaction of R1132 (E), no significant increase or decrease in temperature was observed. After that, the inside of the pressure-resistant container was checked after the internal pressure and the internal temperature were sufficiently lowered, but no soot was generated.

It should be noted that the present disclosure is not limited to the description of the above-described embodiment, and various modifications can be made within the scope of the claims, and the disclosure is disclosed in different embodiments and a plurality of modifications. Embodiments obtained by appropriately combining the above technical means are also included in the technical scope of the present disclosure.

The present disclosure can be suitably used in the field of working media used in refrigeration cycles, as well as air conditioners (air conditioners), refrigerators (household and commercial), dehumidifiers, showcases, ice makers, heat pumps. It can be widely and suitably used in the field of refrigeration cycle systems such as water heaters, heat pump type washer-dryers, and vending machines.

10 Air conditioner (refrigeration cycle system)
11 Indoor unit 12 Outdoor unit 13 Piping 14 Heat exchanger 15 Heat exchanger 16 Compressor 17 Decompression device 18 Four-way valve 20 Refrigerator (refrigerator cycle system)
21 Compressor 22 Condenser 23 Decompressor 24 Evaporator 25 Piping

Claims (11)

Contains 1,2-difluoroethylene as a refrigerant component,
Further, it contains a haloalkane having 1 or 2 carbon atoms and excluding the case where all halogen atoms are fluorine.
Working medium for refrigeration cycle. The working medium for a refrigeration cycle according to claim 1, wherein the 1,2-difluoroethylene is trans-1,2-difluoroethylene. The haloalkane is derived from the following equation (1).
C ₂ H _m X _n ... (1)
(However, X in the formula (1) is a halogen atom selected from the group consisting of F, Cl, Br, and I, m is an integer of 0 or more, n is an integer of 1 or more, and further. The sum of m and n is 6, and when n is 2 or more, X is a halogen atom of the same or different type), and haloethane having the structure shown in the above (except when X is F only), and the following equation. (2)
CH _p X _q ... (2)
(However, X in the formula (2) is a halogen atom selected from the group consisting of F, Cl, Br, and I, p is an integer of 0 or more, q is an integer of 1 or more, and further. The sum of p and q is 4, and when q is 2 or more, X is a halogen atom of the same or different type), halomethane having the structure shown in (except when X is F only).
The working medium for a refrigeration cycle according to claim 1 or 2, which is at least one of the above. The working medium for a refrigeration cycle according to claim 3, wherein the halogen atom X is at least one of F and I. The working medium for a refrigeration cycle according to claim 3, wherein the halomethane is a halogen atom X containing Br. The refrigeration cycle operating medium according to claim 3 or 4, wherein the haloethane is 1,1,1-trifluoro-2-iodoethane (CF ₃ CH ₂ I). The working medium for a refrigeration cycle according to claim 3, wherein the halomethane is trifluoroiodomethane (CF ₃ I). Further containing difluoromethane as the refrigerant component,
The working medium for a refrigeration cycle according to any one of claims 1 to 7, wherein the content of the difluoromethane is less than 60% by mass when the total amount of the refrigerant component and the haloalkane is 100% by mass. The working medium for a refrigeration cycle according to any one of claims 1 to 7, wherein the content of the haloalkane is 3% by mass or less when the total amount of the refrigerant component and the haloalkane is 100% by mass. The working medium for a refrigeration cycle according to claim 9, wherein the content of the haloalkane is 1.2% by mass or more when the total amount of the refrigerant component and the haloalkane is 100% by mass. A refrigeration cycle system configured by using the working medium for a refrigeration cycle according to any one of claims 1 to 10.

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