Composition containing refrigerant, use of same, refrigerator comprising same, and method for operating said refrigerator

Patent metadata

Field	Value
Publication number	US-12241014-B2
Application number	US-202117551792-A
Country	US
Kind code	B2
Filing date	Dec 15, 2021
Priority date	Jun 19, 2019
Publication date	Mar 4, 2025
Grant date	Mar 4, 2025

Abstract

Provided is a novel, low-GWP mixed refrigerant. A composition contains a refrigerant that contains trans-1,2-difluoroethylene (HFO-1132(E)), trifluoroethylene (HFO-1123), and 1,3,3,3-tetrafluoropropene (R1234ze).

First claim

The invention claimed is:

1. A composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132(E)), trifluoroethylene (HFO-1123), and 1,3,3,3-tetrafluoropropene (R1234ze),
wherein
when the mass % of HFO-1132(E), HFO-1123, and R1234ze based on their sum in the refrigerant is respectively x, y, and z, coordinates (x,y,z) in a ternary composition diagram in which the sum of HFO-1132(E), HFO-1123, and R1234ze is 100 mass % fall within a figure surrounded by line segments EJ, JC, CD, DF, and FE, which connect the following 5 points, or fall on any of line segments EJ, CD, and FE, but not fall on point J, point C, point D, or point F:

point E (42.5, 27.9, 29.6),
point J (42.5, 1.0, 56.5),
point C (39.1, 1.0, 59.9),
point D (1.0, 44.4, 54.6), and
point F (1.0, 64.0, 35.0),
line segments EJ, JC, and DF are straight lines,
coordinates (x,y,z) of a point on line segment CD are represented by (x, 0.0021x 2 −1.2228x+45.621, −0.0021x 2 +0.2228x+54.379), and
coordinates (x,y,z) of a point on line segment FE are represented by (x, 0.0025x 2 −0.979x+64.976, −0.0025x 2 −0.021x+35.024).

2. The composition according to claim 1 , which is for use as a working fluid for a refrigerating machine, the composition further comprising a refrigeration oil.

3. The composition according to claim 1 , which is for use as an alternative refrigerant for R404A.

4. A method for operating a refrigerating machine, comprising circulating the composition of claim 1 as a working fluid in a refrigerating machine.

5. A method for operating a refrigerating machine, comprising circulating the composition of claim 1 as a working fluid in a refrigerating machine, wherein the composition is an alternative refrigerant for R404A.

6. A refrigerating machine comprising the composition of claim 1 as a working fluid.

Assignees

• Daikin Ind Ltd

Inventors

• Itano Mitsushi
• Ohkubo Shun
• Karube Daisuke

Classifications

• C09K2205/40

  Replacement mixtures · CPC title

• C09K2205/22

  All components of a mixture being fluoro compounds · CPC title

• C09K2205/126

  Unsaturated fluorinated hydrocarbons · CPC title

• F25B9/006

  the refrigerant containing more than one component (F25B9/004 takes precedence) · CPC title

• C09K5/045 Primary

  containing only fluorine as halogen · CPC title