Patent ID: 11952529
Assignee: DAIKIN INDUSTRIES, LTD.
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  F | IPC C  F

Claim 0:
1. A composition comprising a refrigerant that contains R32, R125, R143a, R1234yf, and R134a,
the composition comprising one member selected from the group consisting of refrigerant 1, refrigerant 2, and refrigerant 3,, wherein
when the total concentration of R32, R125, R143a, R1234yf, and R134a is 100 mass %,
in a ternary composition diagram in which
the concentration of R32 is x mass %,
the ratio r of the R1234yf concentration and the total concentration of R1234yf and R134a is r=100*R1234yf/(R1234yf+R134a), and
the total concentration of R125, R143a, R1234yf, and R134a is (100-x) mass %, refrigerant 1 has a compositional ratio as follows, (1)-1 20.0 mass %>x≥17.4 mass %, and 100≥r≥0,, (1)-2 the concentration (mass %) of R125, the concentration (mass %) of R143a, and the concentration (mass %) of (R1234yf+R134a) fall within a square or triangular region that has the following points as vertices (with the proviso that r=0 or 100 is excluded)

point A0≤r≤100[−0.0005r2+(−0.0074x+0.2803)r+(0.3692x+51.618)/0/100−R32−R125],

point B0≤r≤100[0/−0.0005r2+(−0.0049x+0.2751)r+(0.2185x+35.728)/100−R32−R143a], 

point C0≤r≤100[(0.00004x−0.0002)r2+(−0.0131x−0.0403)r+(−2.5154x+89.168)/0/100−R32−R125],

and

point D0≤r≤100[0/0.0006r2+(−0.0043x−0.1555)r+(−2.2846x+79.443)/100−R32−R143a]; 

refrigerant 2 has a compositional ratio as follows, (2)-1 22.5 mass %>x≥20.0 mass %, and 100≥r≥0,, (2)-2 the concentration (mass %) of R125, the concentration (mass %) of R143a, and the concentration (mass %) of (R1234yf+R134a) fall within a square region that has the following points as vertices (with the proviso that r=0 or 100 is excluded)

point A0≤r≤100[(0.00008x−0.0021)r2+(−0.0118x+0.3686)r+(0.3772x+51.459)/0/100−R32−R125],

point B0≤r≤100[0/(0.00004x−0.0013)r2+(−0.0066x+0.3086)r+(0.2904x+34.289)/100−R32−R143a], 

point C0≤r≤100[(0.00004x−0.0002)r2+(−0.00148x+0.074)r+(−2.4356x+87.572)/0/100−R32−R125],

and

point D0≤r≤100[(0.00008x−0.001)r2+(−0.0087x−0.0681)r+(−2.1632x+77.015)/100−R32−R143a]; and

refrigerant 3 has a compositional ratio as follows, (3)-1 25.0 mass %≥x≥22.5 mass %, and 100≥r≥0,, (3)-2 the concentration (mass %) of R125, the concentration (mass %) of R143a, and the concentration (mass %) of (R1234yf+R134a) fall within a square region that has the following points as vertices (with the proviso that r=0 or 100 is excluded)

point A0≤r≤100[−0.0003r2+(−0.006x+0.2381)r+(0.3552x+51.954)/0/100−R32−R125],

point B0≤r≤100[0/−0.0004r2+(−0.0054x+0.2825)r+(0.2412x+35.396)/100−R32−R143a], 

point C0≤r≤100[0.0007r2+(−0.0116x+0.002)r+(−2.4616x+88.157)/0/100−R32−R125], and

point D0≤r≤100[0/(0.00004x−0.0001)r2+(−0.0075x−0.0951)r+(−2.1488x+76.691)/100−R32−R143a].