	US 12,441,922 B2
	Refrigerant-containing composition, use of same, refrigerator having same, operation method for said refrigerator, and refrigeration cycle device equipped with same
Mitsushi Itano, Osaka (JP); Shun Ohkubo, Osaka (JP); and Daisuke Karube, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed on Dec. 17, 2021, as Appl. No. 17/554,897.
Application 17/554,897 is a continuation of application No. PCT/JP2020/024190, filed on Jun. 19, 2020.
Claims priority of application No. 2019-114165 (JP), filed on Jun. 19, 2019.
Prior Publication US 2022/0106513 A1, Apr. 7, 2022
Int. Cl. C09K 5/04 (2006.01)

CPC C09K 5/045 (2013.01) [C09K 2205/126 (2013.01)]

11 Claims

1. A composition comprising a refrigerant,

wherein the refrigerant contains trans-1,2-difluoroethylene (HFO-1132 (E)), trifluoroethylene (HFO-1123) and 2,3,3,3-tetrafluoro-1-propene (R1234yf), and difluoromethane (R32), and

wherein, in the refrigerant, when mass percentages of HFO-1132 (E), HFO-1123 and R1234yf, and R32, based on their sum are defined as x, y and z, and a, respectively, in a ternary composition diagram in which a sum of HFO-1132 (E), HFO-1123 and R1234yf is (100−a) % by mass, coordinates (x,y,z) are:

in a case of 0<a≤11.1,

within a range of a figure surrounded by lines JL, LM, MN, NK′, K′B, BD′, D′C, and CJ connecting each of eight points:

point J (100−a−y, −0.0049a²−0.0355a+52.9, 0.0);

point L (−0.0217a²−0.9307a+63.0, 95.0−a−x, 5.0);

point M (0.0292a²−1.7567a+68.9, −0.0194a²+0.8278a+16.1, 100−a−x−y);

point N (0.043a²−2.1084a+66.9, −0.0268a²+0.6129a+9.4, 100−a−x−y);

point K′ (−0.051a²+0.0929a+25.95, 100−a−x−z, −0.0191a²+1.0231a+32.4);

point B (0.0, 0.0144a²−1.6377a+58.7, 100−a−y);

point D′ (0.0, 0.0224a²+0.968a+75.4, 100−a−y); and

point C (−0.2304a²−0.4062a+32.9, 100−a−x, 0.0),

or on the lines JL, LM, MN, NK′, K′B, and D′C (except for point B, point D′, point C, and point J);

in a case of 11.1<a≤18.2,

within a range of a figure surrounded by lines JL, LM, MN, NK′, K′B, BW, and WJ connecting each of seven points:

point J (100−a−y, −0.0243a²+0.4161a+50.275, 0.0);

point L (0.0187a²−1.4492a+63.783, 95.0−a−x, 5.0);

point M (0.0197a²−1.5633a+67.924, −0.0611a²+1.9179a+9.1435, 100−a−x−y);

point N (0.009a²−1.3469a+62.647, −0.0225a²+0.5467a+9.6045, 100−a−x−y);

point K′ (0.0341a²−2.1977a+61.187, 100−a−x−z, −0.0105a²+0.8577a+33.177);

point B (0.0, 0.0075a²−1.5156a+58.199, 100−a−y); and

point W (0.0, 100−a, 0.0),

or on the lines JL, LM, MN, NK′, and K′B (except for point B, point W, and point J);

in a case of 18.2<a≤26.7,

within a range of a figure surrounded by lines JL, LM, MN, NK′, K′B, BW, and WJ connecting each of seven points:

point J (100−a−y, −0.0246a²+0.4476a+49.816, 0.0);

point L (0.0197a²−1.5187a+64.723, 95.0−a−x, 5.0);

point M (0.0145a²−1.3925a+66.539, 0.01a²−0.5903a+31.23, 100−a−x−y);

point N (0.0213a²−1.8283a+67.31, −0.2706a+17.025, 100−a−x−y);

point K′ (0.0196a²−1.7863a+58.515, 100−a−x−z, −0.0117a²+0.8999a+32.783);

point B (0.0, 0.009a²−1.6045a+59.318, 100−a−y); and

point W (0.0, 100−a, 0.0),

or on the lines JL, LM, MN, NK′, and K′B (except for point B, point W, and point J); and

in a case of 26.7<a≤36.7,

within a range of a figure surrounded by lines JL, LM, MN, NK′, K′A, AB, BW, and WJ connecting each of eight points:

point J (100−a−y, −0.0183a²+0.1399a+53.507, 0.0);

point L (0.0081a²−0.9541a+57.893, 95.0−a−x, 5.0);

point M (0.005a²−0.8563a+59.007, 0.03558a²−2.4139a+61.708, 100−a−x− y);

point N (0.0108a²−1.1054a+55.507, 0.005a²−0.3563a+15.757, 100−a−x−y);

point K′ (−0.0051a²+0.0929a+25.95, 0.0, 100−a−x);

point A (0.0103a²−1.9225a+68.793, 0.0, 100−a−x);

point B (0.0, 0.0046a²−1.41a+57.286, 100−a−y); and

point W (0.0, 100−a, 0.0),

or on the lines JL, LM, MN, NK′, K′A, and AB (except for point K′, point A, point B, point W, and point J).