US 12,187,950 B2
Composition containing refrigerant, and refrigeration method using said composition, operating method for refrigeration device, and refrigeration device
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 Mar. 24, 2023, as Appl. No. 18/126,023.
Application 18/126,023 is a continuation of application No. 17/136,514, filed on Dec. 29, 2020, granted, now 11,840,658.
Application 17/136,514 is a continuation of application No. 16/993,582, filed on Aug. 14, 2020, granted, now 11,525,076, issued on Dec. 13, 2022.
Application 16/993,582 is a continuation of application No. PCT/JP2019/050501, filed on Dec. 24, 2019.
Claims priority of application No. 2019-013979 (JP), filed on Jan. 30, 2019; and application No. 2019-115584 (JP), filed on Jun. 21, 2019.
Prior Publication US 2023/0265328 A1, Aug. 24, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C09K 5/04 (2006.01); B60H 1/32 (2006.01)
CPC C09K 5/045 (2013.01) [B60H 1/32 (2013.01); C09K 2205/122 (2013.01); C09K 2205/22 (2013.01); C09K 2205/40 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A refrigeration method comprising operating a refrigeration cycle,
in which the evaporation temperature is −75 to −5° C., using a composition comprising a refrigerant and water,
the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132 (E)) and 2,3,3,3-tetrafluoropropene (HFO-1234yf),
wherein the refrigerant comprises HFO-1132 (E) and HFO-1234yf in such amounts that the sum of HFO-1132 (E) and HFO-1234yf is 99.5 mass % or more,
wherein HFO-1132 (E) is present in an amount of 35.0 to 65.0 mass %, and HFO-1234yf is present in an amount of 65.0 to 35.0 mass %, based on the total mass of HFO-1132 (E) and HFO-1234yf, and
wherein the content of water in the composition is 0.1 mass % or less.