Composition for heat cycle system, and heat cycle system

Patent metadata

Field	Value
Publication number	US-2016333241-A1
Application number	US-201615218521-A
Country	US
Kind code	A1
Filing date	Jul 25, 2016
Priority date	Feb 20, 2014
Publication date	Nov 17, 2016
Grant date	—

Abstract

To provide a composition for a heat cycle system having favorable lubricating properties and comprising a working fluid for heat cycle which has a low global warming potential and which can replace R410A, and a heat cycle system employing the composition.
A composition for a heat cycle system comprising a working fluid for heat cycle containing an unsaturated fluorinated hydrocarbon compound having a specific structure, and a refrigerant oil having a breakdown voltage of at least 25 kV, having a hydroxy value of at most 0.1 mgKOH/g, and having a minimum temperature on the high temperature side of the phase separation temperature from the working fluid for heat cycle of at least 35° C. and a maximum temperature on the low temperature side of at most −60° C., and a heat cycle system employing the composition for a heat cycle system.

First claim

What is claimed is:

1 . A composition for a heat cycle system comprising a working fluid for heat cycle containing at least one unsaturated fluorinated hydrocarbon compound selected from a compound having at least one carbon-carbon unsaturated bond in its molecule represented by the following formula (I), and
a refrigerant oil having a breakdown voltage of at least 25 kV, having a hydroxy value of at most 0.1 mgKOH/g, and a minimum temperature on the high temperature side of the phase separation temperature from the working fluid for heat cycle of at least 35° C. and a maximum temperature on the low temperature side of at most −60° C.:
C x C y R z   (I)

wherein R is H or Cl, x is an integer of from 2 to 6, y is an integer of from 1 to 12, and z is an integer of from 0 to 11, provided that 2x≧y+z≧2.

2 . The composition for a heat cycle system according to claim 1 , wherein the compound of the formula (I) wherein x is 2 or 3 is contained.

3 . The composition for a heat cycle system according to claim 2 , wherein as the unsaturated fluorinated hydrocarbon compound, at least one member selected from the group consisting of trifluoroethylene, 2,3,3,3-tetrafluoropropene, 1,2-difluoroethylene, 2-fluoropropene, 1,1,2-trifluoropropene, (E)-1,2,3,3,3-pentafluoropropene, (Z)-1,2,3,3,3-pentafluoropropene, (E)-1,3,3,3-tetrafluoropropene, (Z)-1,3,3,3-tetrafluoropropene and 3,3,3-trifluoropropene is contained.

4 . The composition for a heat cycle system according to claim 1 , wherein the working fluid for heat cycle further contains a saturated fluorinated hydrocarbon compound.

5 . The composition for a heat cycle system according to claim 4 , wherein as the saturated fluorinated hydrocarbon compound, at least one member selected from the group consisting of trifluoromethane, difluoromethane, difluoroethane, trifluoroethane, tetrafluoroethane, pentafluoroethane, trifluoroiodomethane, pentafluoropropane, hexafluoropropane, heptafluoropropane, pentafluorobutane and heptafluorocyclopentane is contained.

6 . The composition for a heat cycle system according to claim 1 , wherein as the unsaturated fluorinated hydrocarbon compound, trifluoroethylene is contained, and the content of trifluoroethylene is from 20 to 80 mass % per 100 mass % of the working fluid for heat cycle.

7 . The composition for a heat cycle system according to claim 4 , wherein as the saturated fluorinated hydrocarbon compound, difluoromethane is contained, and the content of difluoromethane is from 20 to 80 mass % per 100 mass % of the working fluid for heat cycle.

8 . The composition for a heat cycle system according to claim 4 , wherein trifluoroethylene and 2,3,3,3-tetrafluoropropene are contained as the unsaturated fluorinated hydrocarbon compound, and difluoromethane is contained as the saturated fluorinated hydrocarbon compound,
the proportion of the total amount of trifluoroethylene, 2,3,3,3-tetrafluoropropene and difluoromethane based on the entire amount of the working fluid for heat cycle is higher than 90 mass % and at most 100 mass %, and based on the total amount of trifluoroethylene, 2,3,3,3-tetrafluoropropene and difluoromethane, the proportion by the mass of trifluoroethylene is at least 10 mass % and less than 70 mass %, the proportion by the mass of 2,3,3,3-tetrafluoropropene is higher than 0 mass % and at most 50 mass %, and the proportion by the mass of difluoromethane is higher than 30 mass % and at most 75 mass %.

9 . The composition for a heat cycle system according to claim 4 , wherein trifluoroethylene and 2,3,3,3-tetrafluoropropene are contained as the unsaturated fluorinated hydrocarbon compound, and difluoromethane is contained as the saturated fluorinated hydrocarbon compound,
the proportion of the total amount of trifluoroethylene, 2,3,3,3-tetrafluoropropene and difluoromethane based on the entire amount of the working fluid for heat cycle is higher than 90 mass % and at most 100 mass %, based on the total amount of trifluoroethylene, 2,3,3,3-tetrafluoropropene and difluoromethane, the proportion by the mass of the total amount of trifluoroethylene and 2,3,3,3-tetrafluoropropene is at least 70 mass %, the proportion by the mass of trifluoroethylene is at least 30 mass % and at most 80 mass %, the proportion by the mass of 2,3,3,3-tetrafluoropropene is higher than 0 mass % and at most 40 mass %, and the proportion by the mass of difluoromethane is higher than 0 mass % and at most 30 mass %, and the ratio of trifluoroethylene to 2,3,3,3-tetrafluoropropene is at most 95/5.

10 . The composition for a heat cycle system according to claim 1 , wherein the refrigerant oil is at least one member selected from a polyol ester refrigerant oil and a polyvinyl ether refrigerant oil.

11 . The composition for a heat cycle system according to claim 1 , wherein the refrigerant oil has a kinematic viscosity at 40° C. of from 5 to 200 mm 2 /s and a kinematic viscosity at 100° C. of from 1 to 100 mm 2 /s.

12 . The composition for a heat cycle system according to claim 1 , wherein the refrigerant oil has an aniline point of at least −100° C. and at most 0° C.

13 . A heat cycle system, which employs the composition for a heat cycle system as defined in claim 1 .

14 . The heat cycle system according to claim 13 , which is at least one member selected from a refrigerating apparatus, an air-conditioning apparatus, a power generation system, a heat transport apparatus and a secondary cooling machine.

15 . The heat cycle system according to claim 14 , wherein the heat cycle system has a compression mechanism having a contact portion to be in contact with the composition for a heat cycle system, and the contact portion is composed of at least one member selected from an engineering plastic, an organic film and an inorganic film.

Assignees

• Asahi Glass Co Ltd

Inventors

• Fukushima Masato
• Mitsuoka Hiroaki
• TASAKA Mai
• Shirakawa Daisuke
• Takagi Hirokazu
• Arai Takeaki

Classifications

• C10N2030/04

  Detergent property or dispersant property · CPC title

• C10N2040/30

  Refrigerators lubricants {or compressors lubricants} · CPC title

• C10N2020/101

  Containing Hydrofluorocarbons · CPC title

• C10N2030/02

  Pour-point; Viscosity index · CPC title

• C10N2030/28

  Anti-static · CPC title