	US 11,952,529 B2
	Composition containing refrigerant comprising R32, R125, R143A, R1234YF and R134A, and refrigeration method, refrigerator operating method and refrigerator using said composition
Mitsushi Itano, Osaka (JP); Hitomi Kuroki, Osaka (JP); Shun Ohkubo, Osaka (JP); Tatsumi Tsuchiya, Osaka (JP); and Kenji Gobou, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Appl. No. 17/047,913
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
PCT Filed Apr. 18, 2019, PCT No. PCT/JP2019/016710 § 371(c)(1), (2) Date Oct. 15, 2020, PCT Pub. No. WO2019/203328, PCT Pub. Date Oct. 24, 2019.
Claims priority of application No. 2018-080117 (JP), filed on Apr. 18, 2018.
Prior Publication US 2021/0108120 A1, Apr. 15, 2021
Int. Cl. F25B 41/00 (2021.01); C09K 5/04 (2006.01)

CPC C09K 5/045 (2013.01) [C09K 2205/122 (2013.01); C09K 2205/126 (2013.01); C09K 2205/22 (2013.01); C09K 2205/40 (2013.01)]

11 Claims

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 A_0≤r≤100[−0.0005r²+(−0.0074x+0.2803)r+(0.3692x+51.618)/0/100−R32−R125],

point B_0≤r≤100[0/−0.0005r²+(−0.0049x+0.2751)r+(0.2185x+35.728)/100−R32−R143a],

point C_0≤r≤100[(0.00004x−0.0002)r²+(−0.0131x−0.0403)r+(−2.5154x+89.168)/0/100−R32−R125],

and

point D_0≤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 A_0≤r≤100[(0.00008x−0.0021)r²+(−0.0118x+0.3686)r+(0.3772x+51.459)/0/100−R32−R125],

point B_0≤r≤100[0/(0.00004x−0.0013)r²+(−0.0066x+0.3086)r+(0.2904x+34.289)/100−R32−R143a],

point C_0≤r≤100[(0.00004x−0.0002)r²+(−0.00148x+0.074)r+(−2.4356x+87.572)/0/100−R32−R125],

and

point D_0≤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 A_0≤r≤100[−0.0003r²+(−0.006x+0.2381)r+(0.3552x+51.954)/0/100−R32−R125],

point B_0≤r≤100[0/−0.0004r²+(−0.0054x+0.2825)r+(0.2412x+35.396)/100−R32−R143a],

point C_0≤r≤100[0.0007r²+(−0.0116x+0.002)r+(−2.4616x+88.157)/0/100−R32−R125], and

point D_0≤r≤100[0/(0.00004x−0.0001)r²+(−0.0075x−0.0951)r+(−2.1488x+76.691)/100−R32−R143a].