Composition for heat cycle system, and heat cycle system

Patent metadata

Field	Value
Publication number	US-9725632-B2
Application number	US-201615253040-A
Country	US
Kind code	B2
Filing date	Aug 31, 2016
Priority date	Mar 18, 2014
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

A composition for a heat cycle system having less influence over the ozone layer, a low global warming potential, and excellent stability and durability is provided. A heat cycle system using the composition is also provided. The composition contains a working fluid and a phosphoric acid ester. The working fluid contains trifluoroethylene and difluoromethane. An interaction distance (Ra) between the working fluid and the phosphoric acid ester as determined from the Hansen solubility parameters is at most 15.

First claim

What is claimed is:

1. A composition, comprising:
a working fluid containing trifluoroethylene and difluoromethane, and
a phosphoric acid ester,
wherein an interaction distance Ra between the working fluid and the phosphoric acid ester as determined from Hansen solubility parameters of the working fluid and the phosphoric acid ester is less than 9.0.

2. The composition according to claim 1 , wherein a content of the phosphoric acid ester is from 0.01 to 10 mass % based on a total mass of the working fluid.

3. The composition according to claim 1 , wherein the phosphoric acid ester is a phosphoric acid triester, an acidic phosphoric acid monoester, or an acidic phosphoric acid diester.

4. The composition according to claim 3 , wherein the phosphoric acid ester is the phosphoric acid triestes, which is a trialkyl phosphate or a triaryl phosphate.

5. The composition according to claim 3 , wherein the phosphoric acid ester is the acidic phosphoric acid monoester, which is a monoalkyl acid phosphate or a monoaryl acid phosphate.

6. The composition according to claim 3 , wherein the phosphoric acid ester is the acidic phosphoric acid diester, which is a dialkl acid phosphate or a diaryl acid phosphate.

7. The composition according to claim 1 , wherein a mass ratio of trifluoroethylene to difluoromethane in the working fluid is from 1/99 to 99/1.

8. The composition according to claim 1 , wherein the working fluid further contains at least one hydrofluoroolefin selected from the group consisting of 2,3,3,3-tetrafluoropropene and 1,3,3,3-tetrafluoropropene.

9. The composition according to claim 8 , wherein
the working fluid contains trifluoroethylene, difluoromethane, and 2,3,3,3-tetrafluoropropene, and
proportions of trifluoroethlene difluoromethane, and 2,3,3,3-tetrafluoropropene based on a total mass of trifluoroethylene, difluoromethane, and 2,3,3,3-tetrailuoropropene are as follows:
10 mass %≦trifluoroethylene<75 mass %,
5 mass %≦odifluoromethane≦75 mass %, and
0 mass %≦2,3,3,3-tetrafluoropropene≦50 mass %.

10. The composition according to claim 8 , wherein
the working fluid contains trifluoroethylene, difluoromethane, and 1,3,3,3-tetrafluoropropene, and
proportions of trifluoroethylene, difluoromethane, and 1,3,3,3-tetrafluoropropene based on a total mass of trifluoroethylene, difluoromethane, and 1,3,3,3-tetrafluoropropene are as follows:
10 mass %≦trifluoroethylene≦80 mass %,
5 mass %≦difluoromethane≦80 mass %, and
5 mass %≦1,3,3,3-tetrafluoropropene≦45 mass %.

11. A heat cycle system, comprising:
the composition according to claim 1 .

12. The heat cycle system according to claim 11 , which is a refrigerating apparatus, an air-conditioning apparatus, a power generation system, a heat transport apparatus, or a secondary cooling machine.

Assignees

• Asahi Glass Co Ltd

Inventors

• Ueno Katsuya
• Fujii Katsuya
• Yamamoto Hiroshi

Classifications

• C10N2030/70

  Soluble oils · CPC title

• C10N2040/30

  Refrigerators lubricants {or compressors lubricants} · CPC title

• C10N2030/02

  Pour-point; Viscosity index · CPC title

• F25B2500/222

  Detecting refrigerant leaks · CPC title

• C09K5/045 Primary

  containing only fluorine as halogen · CPC title