Granted Patent B2

US 12,473,477 · App. 17/865,923 · Granted Nov 18, 2025

Inventors: Mitsushi Itano (Osaka, JP); Hitomi Kuroki (Osaka, JP); Kazuhiro Takahashi (Osaka, JP)

Assignee: DAIKIN INDUSTRIES, LTD.

C09K5/045C09K2205/106C09K2205/126C09K2205/40

Abstract

Claims (7)

1 . A composition comprising a refrigerant,

the refrigerant comprising CF 3 I, CO 2 (R744), HFC-32, and at least one compound A selected from the group consisting of trifluoroethylene (HFO-1123), trans-1,2-difluoroethylene [(E)-HFO-1132], cis-1,2-difluoroethylene [(Z)-HFO-1132], fluoroethylene (HFO-1141), and 3,3,3-trifluoropropyne (TFP),

wherein the refrigerant comprises 38 to 69 mass % of CF 3 I, 1 to 10 mass % of CO 2 , based on the total amount of CF 3 I, CO 2 , HFC-32, and compound A taken as 100 mass %.

2 . The composition according to claim 1 , wherein the refrigerant further comprises at least one compound B selected from the group consisting of tetrafluoromethane (FC-14), trifluoromethane (HFC-23), pentafluoroethane (HFC-125), 1,1,1,2-tetrafluoroethane (HFC-134a), 1,1,2,2-tetrafluoroethane (HFC-134), 1,1-difluoroethane (HFC-152a), 1,2-difluoroethane (HFC-152), 1,1,1-trifluoroethane (HFC-143a), 1,1,2-trifluoroethane (HFC-143), 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea), 2,3,3,3-tetrafluoropropene (HFO-1234yf), trans-1,3,3,3-tetrafluoropropene [(E)-HFO-1234ze], 1,2,3,3,3-pentafluoropropene (HFO-1225ye), 3,3,3-trifluoropropene (HFO-1243zf), and difluoropropene (HFO-1252).

3 . A refrigerating machine comprising the composition according to claim 1 as a working fluid.

4 . A heat transfer medium comprising the composition according to claim 1 .

5 . A heat cycle system using the heat transfer medium according to claim 4 .

Priority Claims (1)

Continuity (2)

References Cited (25)