An air-conditioning apparatus includes a refrigeration cycle charged with non-azeotropic refrigerant mixture and refrigerating machine oil. A suction pipe which is a refrigerant pipe connecting between a suction port of a compressor and an accumulator has an end portion on the side of the accumulator extending into the accumulator. In addition, the suction pipe of the air-conditioning apparatus includes an oil return hole formed in a portion of the suction pipe located inside the accumulator at a position higher than a central portion of the accumulator. A controller of the air-conditioning apparatus controls an opening degree of a pressure reducing device so as to make quality of refrigerant flowing into the accumulator less than 1.

An azeotrope-like mixture consisting essentially of chlorotrifluoropropene and at least one component selected from the group consisting of pentane, hexane, methanol, and trans-1,2-dichloroethene.

The present technology relates to compositional blends that can be used as refrigerants, and more specifically to blends of vinylidene fluoride and at least one other component for use in very low temperature applications. In at least some examples, the second component can be selected from the group consisting of carbon dioxide and pentafluoroethane. Further, the compositions can be azeotropic or azeotrope-like.

Refrigeration lubricants with at least one thiophosphorus additive for use in hydrofluorocarbon refrigeration systems. The thiophosphorus additives may improve the stability and metals and/or refrigerant compatibility of the refrigeration lubricant.

Provided are azeotrope-like compositions comprising tetrafluoropropene and hydrofluorocarbons and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agent compositions, and aerosol propellants.

A non-azeotropic refrigerant mixture attains an extremely low temperature of 200 deg. C. through 150 deg. C. in a refrigerating system equipped with a heat exchanger;

a non-azeotropic refrigerant mixture which attains a low temperature of 100 deg. C. or lower is a non-azeotropic refrigerant mixture which comprises a base refrigerant and R-14 wherein R-14 is contained in an amount of 5 wt % through 40 wt %, whereas the base refrigerant consists of butane plus propane and R-23 plus R-116 as the low boiling point refrigerant;
also, a non-azeotropic refrigerant mixture that attains 120 deg. C. or lower is a non-azeotropic refrigerant mixture which comprises R-50 plus R-740 as well as a base refrigerant and R-14 wherein the base refrigerant/R-14 ratio is 95/5 through 60/40 and R-50 and R-740 are contained respectively in an amount of 1 wt % through 10 wt.

Provided are azeotrope-like compositions comprising tetrafluoropropene and hydrofluorocarbons and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agent compositions, and aerosol propellants.

A method for controlling a refrigerating system using a non-azeotropic mixed refrigerant is provided. The refrigerating system may include a first evaporator configured to supply cold air to a freezer compartment located upstream and a second evaporator configured to supply cold air to a refrigerating compartment located downstream, based on a flow direction of the non-azeotropic mixed refrigerant. The method may include a first operation comprising operating a compressor, a freezer compartment fan to blow air to the first evaporator, and a refrigerating compartment fan to blow air to the second evaporator; a second operation comprising when the freezer compartment reaches a target temperature or the refrigerating compartment reaches a target temperature, continuously operating the compressor, and stopping the freezer compartment fan or the refrigerating compartment fan corresponding to one of the freezer compartment or the refrigerating compartment that reaches the target temperature; and a third operation comprising when both the freezer compartment and the refrigerating compartment reach the target temperatures, turning off both of the refrigerating compartment fan and the freezer compartment fan and stopping the compressor.

A refrigeration cycle apparatus includes a compressor, a utilization-side heat exchanger, a heat source-side expansion valve, a heat source-side heat exchanger, an accumulator, and a main refrigerant circuit. A non-azeotropic refrigerant mixture is sealed in the main refrigerant circuit. A first value obtained by dividing a value obtained by subtracting a second amount from a first amount by the first amount exceeds a value determined in accordance with a mixed refrigerant. The first amount is an amount of the mixed refrigerant sealed in the main refrigerant circuit. The second amount is an amount of a liquid refrigerant stored in the accumulator.

A nonflammable solvent composition comprises a nonflammable solvent and optionally, an additive composition. The nonflammable solvent comprises: about 90.0 wt. % to about 99.99 wt. % of trans-1,2-dichloroethylene; and about 0.01 wt. % to less than about 10.0 wt. % of one or more of (E)-1-chloro-2,3,3-trifluoroprop-1-ene and (Z)-1-chloro-2,3,3-trifluoroprop-1-ene, based on the total weight of trans-1,2-dichloroethylene, (E)-1-chloro-2,3,3-trifluoroprop-1-ene, and (Z)-1-chloro-2,3,3-trifluoroprop-1-ene. The nonflammable solvent composition has no fire point as determined by flammability testing compliant with any one or more of ASTM D92 or ASTM D1310.