Working medium, composition for thermal cycle system, thermal cycle device, and thermal cycle method

Patent metadata

Field	Value
Publication number	US-2026078291-A1
Application number	US-202519394552-A
Country	US
Kind code	A1
Filing date	Nov 19, 2025
Priority date	Jun 1, 2023
Publication date	Mar 19, 2026
Grant date	—

Abstract

There are provided a working medium containing HFO-1234yf, HCFO-1224yd(Z), and HFC-134a, in which a content of HFC-134a is 15.0% by mass or less relative to the total content of HFO-1234yf, HCFO-1224yd(Z), and HIFC-134a, a content of HCFO-1224yd(Z) is 12.0% by mass or less relative to the total content of HFO-1234yf, HCFO-1224yd(Z), and HFC-134a; and a content of HFO-1234yf is 73.0% by mass or more relative to the total content of HFO-1234yf, HCFO-1224yd(Z), and HFC-134a, and applications thereof.

First claim

1 . A working medium containing 2,3,3,3-tetrafluoropropene, (Z)-1-chloro-2,3,3,3-tetrafluoropropene, and 1,1,1,2-tetrafluoroethane, wherein:
a content of the 1,1,1,2-tetrafluoroethane is 15.0% by mass or less relative to a total content of the 2,3,3,3-tetrafluoropropene, the (Z)-1-chloro-2,3,3,3-tetrafluoropropene, and the 1, 1,1,2-tetrafluoroethane, a content of the (Z)-1-chloro-2,3,3,3-tetrafluoropropene is 12.0% by mass or less relative to the total content of the 2,3,3,3-tetrafluoropropene, the (Z)-1-chloro-2,3,3,3-tetrafluoropropene, and the 1,1,1,2-tetrafluoroethane, and a content of the 2,3,3,3-tetrafluoropropene is 73.0% by mass or more relative to the total content of the 2,3,3,3-tetrafluoropropene, the (Z)-1-chloro-2,3,3,3-tetrafluoropropene, and the 1,1,1,2-tetrafluoroethane.

2 . The working medium according to claim 1 , wherein the total content of the 2,3,3,3-tetrafluoropropene, the (Z)-1-chloro-2,3,3,3-tetrafluoropropene, and the 1,1,1,2-tetrafluoroethane is 65.0% by mass or more relative to a total amount of the working medium.

3 . The working medium according to claim 2 , further containing (E)-1,3,3,3-tetrafluoropropene.

4 . The working medium according to claim 1 , wherein the total content of the 2,3,3,3-tetrafluoropropene, the (Z)-1-chloro-2,3,3,3-tetrafluoropropene, and the 1,1,1,2-tetrafluoroethane is 99.0% by mass or more relative to a total amount of the working medium.

5 . The working medium according to claim 1 , wherein the content of the 2,3,3,3-tetrafluoropropene is in a range of from 80.0 to 90.0% by mass relative to the total content of the 2,3,3,3-tetrafluoropropene, the (Z)-1-chloro-2,3,3,3-tetrafluoropropene, and the 1,1,1,2-tetrafluoroethane.

6 . The working medium according to claim 1 , wherein an oxygen concentration in a gas phase portion of the working medium at 25° C., is 0.315% by volume or less.

7 . The working medium according to claim 6 , wherein the content of the 2,3,3,3-tetrafluoropropene is 90.0% by mass or less relative to the total content of the 2,3,3,3-tetrafluoropropene, the (Z)-1-chloro-2,3,3,3-tetrafluoropropene, and the 1,1,1,2-tetrafluoroethane.

8 . A composition for a thermal cycle system, comprising: the working medium according to claim 1 ; and a refrigerating machine oil.

9 . The composition for a thermal cycle system according to claim 8 , wherein the refrigerating machine oil is at least one selected from the group consisting of polyalkylene glycol oil, polyol ester oil, polyvinyl ether oil, and mineral oil.

10 . The composition for a thermal cycle system according to claim 8 , wherein a kinematic viscosity of the refrigerating machine oil at 40° C., is 700 mm 2 /s or less.

11 . A thermal cycle device comprising:
the working medium according to claim 1 ; a compressor that compresses vapor of the working medium; a condenser that cools and liquefies the vapor of the working medium discharged from the compressor; a pressure-reducing device that reduces a pressure of the working medium discharged from the condenser; and an evaporator that heats the working medium discharged from the pressure-reducing device.

12 . The thermal cycle device according to claim 11 , wherein an evaporation temperature of the working medium in the evaporator is controlled to be in a range of from −45 to 10° C.

13 . The thermal cycle device according to claim 11 , wherein an evaporation temperature of the working medium in the evaporator is controlled to be in a range of from −30 to 10° C.

14 . The thermal cycle device according to claim 11 , wherein an evaporation temperature of the working medium in the evaporator is controlled to be in a range of from −20 to 10° C.

15 . The thermal cycle device according to claim 11 , wherein at least a part of each surface that comes into contact with the working medium, in components constituting the thermal cycle device, includes at least one selected from the group consisting of copper and copper alloys.

16 . A thermal cycle device comprising:
the working medium according to claim 7 ; a compressor that compresses vapor of the working medium; a condenser that cools and liquefies the vapor of the working medium discharged from the compressor; a pressure-reducing device that reduces a pressure of the working medium discharged from the condenser; and an evaporator that heats the working medium discharged from the pressure-reducing device, wherein at least a part of each surface that comes into contact with the working medium, in components constituting the thermal cycle device, includes at least one selected from the group consisting of copper and copper alloys.

17 . The thermal cycle device according to claim 15 , wherein each of the components is at least one selected from the group consisting of the compressor, the condenser, the evaporator, and a refrigerant pipe.

18 . A thermal cycle method comprising:
compressing vapor of the working medium according to claim 1 ; cooling and liquefying the vapor of the working medium; reducing a pressure of the liquefied working medium; and heating the pressure-reduced working medium.

19 . A working medium containing 2,3,3,3-tetrafluoropropene, (E)-1,3,3,3-tetrafluoropropene, (Z)-1-chloro-2,3,3,3-tetrafluoropropene, and 1,1,1,2-tetrafluoroethane, wherein:
a content of the 1,1,1,2-tetrafluoroethane is 15.0% by mass or less relative to a total content of the 2,3,3,3-tetrafluoropropene, the (E)-1,3,3,3-tetrafluoropropene, the (Z)-1-chloro-2,3,3,3-tetrafluoropropene, and the 1,1,1,2-tetrafluoroethane; a content of the (E)-1,3,3,3-tetrafluoropropene is 35.0% by mass or less relative to the total content of the 2,3,3,3-tetrafluoropropene, the (E)-1,3,3,3-tetrafluoropropene, the (Z)-1-chloro-2,3,3,3-tetrafluoropropene, and the 1,1,1,2-tetrafluoroethane; a content of the (Z)-1-chloro-2,3,3,3-tetrafluoropropene is 12.0% by mass or less relative to the total content of the 2,3,3,3-tetrafluoropropene, the (E)-1,3,3,3-tetrafluoropropene, the (Z)-1-chloro-2,3,3,3-tetrafluoropropene, and the 1,1,1,2-tetrafluoroethane; and a content of the 2,3,3,3-tetrafluoropropene is 38.0% by mass or more relative to the total content of the 2,3,3,3-tetrafluoropropene, the (E)-1,3,3,3-tetrafluoropropene, the (Z)-1-chloro-2,3,3,3-tetrafluoropropene, and the 1,1,1,2-tetrafluoroethane.

20 . The working medium according to claim 19 , wherein the total content of the 2,3,3,3-tetrafluoropropene, the (E)-1,3,3,3-tetrafluoropropene, the (Z)-1-chloro-2,3,3,3-tetrafluoropropene, and the 1,1,1,2-tetrafluoroethane is 99.0% by mass or more relative to a total amount of the working medium.

21 . The working medium according to claim 19 , wherein an oxygen concentration in a gas phase portion of the working medium at 25° C., is 0.315% by volume or less.

Assignees

• Agc Inc

Inventors

• Hayamizu Hiroki

Classifications

• C09K5/045

  containing only fluorine as halogen · CPC title

• C09K2205/22

  All components of a mixture being fluoro compounds · CPC title

• C09K2205/128

  Perfluorinated hydrocarbons (C09K2205/124, C09K2205/126 take precedence) · CPC title

• C09K2205/126

  Unsaturated fluorinated hydrocarbons · CPC title

• C09K5/044 Primary

  comprising halogenated compounds · CPC title