Working fluid for heat cycle, composition for heat cycle system, and heat cycle system

• US 10,519,355 B2
• Filed: 11/30/2017
• Issued: 12/31/2019
• Est. Priority Date: 01/31/2014
• Status: Active Grant

• Current Assignee: AGC, Inc.
• Original Assignee: AGC, Inc.
• Inventors: Fukushima, Masato
• Primary Examiner(s): McGinty, Douglas J
• Application Number:
  US15/827,591
• Publication Number:
  US 20180086959A1
• Time in Patent Office: 761 Days
• Field of Search: 252 67, 252 68, 62467, 62468
• CPC Class Codes: C09K 2205/122 Halogenated hydrocarbons
• CPC Class Codes: C09K 2205/126 Unsaturated fluorinated hydrocarbons
• CPC Class Codes: C09K 2205/22 All components of a mixture being fluoro compounds
• CPC Class Codes: C09K 2205/40 Replacement mixtures
• CPC Class Codes: C09K 5/045 containing only fluorine as halogen

Abstract

A working fluid for heat cycle, a composition for a heat cycle system containing the working fluid, and a heat cycle system employing the composition are provided. The working fluid contains trifluoroethylene, 2,3,3,3-tetrafluoropropene, and difluoromethane. A proportion of the total amount of trifluoroethylene, 2,3,3,3-tetrafluoropropene, and difluoromethane based on the entire amount of the working fluid 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 of trifluoroethylene is at least 10 mass % and less than 70 mass %, the proportion of 2,3,3,3-tetrafluoropropene is at most 50 mass %, and the proportion of difluoromethane is higher than 30 mass % and at most 75 mass %. The working fluid can replace R410A and has a low global warming potential and high durability.

Claims

1. A working fluid for heat cycle, comprising:

trifluoroethylene, 2,3,3,3-tetrafluoropropene, and difluoromethane.

2. The working fluid of claim 1, wherein, based on a total amount of trifluoroethylene, 2,3,3,3-tetrafluoropropene, and difluoromethane, a proportion of trifluoroethylene is at least 10 mass % and less than 70 mass %, a proportion of 2,3,3,3-tetrafluoropropene is at most 50 mass %, and a proportion of difluoromethane is higher than 30 mass % and at most 44 mass %.

3. The working fluid of claim 2, wherein, based on the total amount of trifluoroethylene, 2,3,3,3-tetrafluoropropene, and difluoromethane, the proportion of trifluoroethylene is at least 20 mass % and less than 70 mass %, and the proportion of 2,3,3,3-tetrafluoropropene is at most 40 mass %.

4. The working fluid of claim 2, wherein, based on the total amount of trifluoroethylene, 2,3,3,3-tetrafluoropropene, and difluoromethane, the proportion of 2,3,3,3-tetrafluoropropene is at least 5 mass % and at most 40 mass %.

5. A composition for a heat cycle system, comprising:

the working fluid of claim 1 and

a lubricating oil.

6. A heat cycle system, which employs the composition of claim 5.

7. The heat cycle system of claim 6, which is a refrigerating apparatus, an air-conditioning apparatus, a power generation system, a heat transport apparatus, or a secondary cooling machine.

8. The heat cycle system of claim 6, which is a room air-conditioner, a store package air-conditioner, a building package air-conditioner, a plant package air-conditioner, a gas engine heat pump, a train air-conditioning system, an automobile air-conditioning system, a built-in showcase, a separate showcase, an industrial fridge freezer, an ice making machine, or a vending machine.