US 12,241,663 B2
Air conditioning process
Wissam Rached, Chaponost (FR)
Assigned to Arkema France, Colombes (FR)
Filed by Arkema France, Colombes (FR)
Filed on Oct. 18, 2022, as Appl. No. 17/968,416.
Application 17/968,416 is a continuation of application No. 17/272,497, granted, now 11,512,877, previously published as PCT/FR2019/051964, filed on Aug. 26, 2019.
Claims priority of application No. 1857886 (FR), filed on Sep. 3, 2018.
Prior Publication US 2023/0038644 A1, Feb. 9, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. F25B 25/00 (2006.01); C09K 5/04 (2006.01); F25B 29/00 (2006.01)
CPC F25B 25/005 (2013.01) [C09K 5/044 (2013.01); F25B 29/003 (2013.01); C09K 2205/122 (2013.01); C09K 2205/126 (2013.01); F25B 2400/121 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A process for air conditioning, by means of a main circuit, the main circuit being a vapor compression circuit, in which circulates a first refrigerant fluid, and of a secondary circuit not comprising a compressor, in which circulates a nonflammable second refrigerant fluid comprising a hydrofluoroolefin and/or a hydrochlorofluoroolefin, the main circuit and the secondary circuit being coupled together;
the process comprising heat exchange between an environment and the first refrigerant fluid, heat exchange between the first and the second refrigerant fluid, and heat exchange between the second refrigerant fluid and air to be conditioned,
wherein the first refrigerant comprises at least one of pentafluoroethane, 1,1,2,2-tetrafluoroethane, 1,1,1,2-tetrafluoroethane, 1,1-difluoroethane, fluoroethane, 1,1,1,2,3,3,3-heptafluoropropane, 1,1,1-trifluoropropane, trifluoroiodomethane, 1,1,2-trifluoroethylene, and mixtures thereof.