	US 11,834,602 B2
	Refrigerant-containing composition, and refrigerating method, refrigerating device operating method, and refrigerating device using said composition
Shun Ohkubo, Osaka (JP); Mitsushi Itano, Osaka (JP); Yuuki Yotsumoto, Osaka (JP); Akihito Mizuno, Osaka (JP); Tomoyuki Gotou, Osaka (JP); and Yasufu Yamada, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed on Jul. 28, 2021, as Appl. No. 17/387,368.
Application 17/387,368 is a continuation of application No. PCT/JP2020/003943, filed on Feb. 3, 2020.
Claims priority of application No. 2019-018617 (JP), filed on Feb. 5, 2019.
Prior Publication US 2021/0355359 A1, Nov. 18, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C09K 5/04 (2006.01); C10M 171/00 (2006.01); C10N 20/00 (2006.01)

CPC C09K 5/045 (2013.01) [C10M 171/008 (2013.01); C09K 2205/126 (2013.01); C09K 2205/40 (2013.01); C10N 2020/101 (2020.05)]

7 Claims

1. A refrigeration method comprising operating a refrigeration cycle using a composition comprising a refrigerant,

said method comprising applying the refrigerant as an alternative refrigerant for R404A,

wherein the refrigerant comprises trans-1,2-difluoroethylene (HFO-1132(E)), 1,1,2-trifluoroethylene (HFO-1123), and 2,3,3,3-tetrafluoropropene (HFO-1234yf),

wherein the total concentration of the three components is 99.5 mass % or more, based on the entire refrigerant, and the three components have a mass ratio that falls within a region surrounded by a figure passing through the following 5 points in a ternary composition diagram whose three vertices represent the three components:

point A (HFO-1132(E)/HFO-1123/HFO-1234yf=42.5/1.0/56.5 mass %),

point B (HFO-1132(E)/HFO-1123/HFO-1234yf=27.1/1.0/71.9 mass %),

point C (HFO-1132(E)/HFO-1123/HFO-1234yf=1.0/30.4/68.6 mass %),

point D (HFO-1132(E)/HFO-1123/HFO-1234yf=1.0/57.0/42.0 mass %), and

point E (HFO-1132(E)/HFO-1123/HFO-1234yf=42.5/24.1/33.4 mass %).