16-11-2017 дата публикации
Номер: US20170328586A1
Принадлежит:
A refrigeration cycle apparatus includes refrigerant circuits in which a high pressure shell compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger are connected; a mixed refrigerant made up of a mixture of 1,1,2-trifluoroethylene, difluoromethane, and 2,3,3,3-tetrafluoropropene and configured to circulate through the refrigerant circuits, the mixed refrigerant containing less than 50 wt % of 1,2,2-trifluoroetylene and a mixing ratio of difluoromethane being between 0.7 times and two times (both inclusive) that of 1,2,2-trifluoroetylene in terms of weight ratio, in a state before the mixed refrigerant is enclosed in the refrigerant circuits; and a refrigerating machine oil enclosed in the refrigerant circuits and prepared such that difluoromethane is least soluble in the refrigerating machine oil. 1. A refrigeration cycle apparatus comprising:a refrigerant circuit in which a high pressure shell compressor, a condenser, an expansion mechanism and an evaporator are connected;a mixed refrigerant circulating through the refrigerant circuit and containing 1,1,2-trifluoroethylene, difluoromethane and 2,3,3,3-tetrafluoropropene mixed with each other, wherein, in a state prior to introduction of the mixed refrigerant into the refrigerant circuit, a mixing ratio of 1,2,2-trifluoroetylene is less than 50 wt % and a mixing ratio of difluoromethane is 0.7 times a mixing ratio of 1,2,2-trifluoroetylene or larger, but not more than two times of the mixing ratio of 1,2,2-trifluoroetylene in terms of weight ratio; anda refrigerating machine oil enclosed in the refrigerant circuit and prepared such that the difluoromethane is least soluble therein, from among 1,1,2-trifluoroethylene, difluoromethane and 2,3,3,3-tetrafluoropropene.2. The refrigeration cycle apparatus of claim 1 , wherein the refrigerating machine oil is prepared such that 2 claim 1 ,3 claim 1 ,3 claim 1 ,3-tetrafluoropropene is more soluble than the 1 claim 1 ,1 claim 1 ,2- ...
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