COOLING COMPOSITION, COOLING METHOD, COOLING APPARATUS Russian patent published in 2008 - IPC C09K5/04 

FIELD: heating; chemistry.

SUBSTANCE: invention includes (a) pentafluoroethane, trifluormethoxydifluoromethane or hexafluorocyclopropane or their combination of two or more components in amount, at least, from 83 to 88 wt % depending on composition weight, (b) 1,1,1,2- or 1,1,2,2- tetrafluoroethane, trifluormethoxypentafluoromethane, 1,1,1,2,3,3-heptafluoropropane or their combination of two or more components in amount, at least, from 10 to 15 wt % depending on composition weight and (c) isobutane in amount from 1% to 4 wt % depending on composition weight, with weight ratio of components (a) : component (b) at least, 3:1. Invention relates also to cooling apparatus containing composition as cooling agent, and to cooling method including cooling composition condensation and subsequent evaporation near to cooled item. Cooling composition containing cooling agent R22 is replaced with composition consisting of ozone non-destroying components. Composition properties and dependencies of steam temperature and pressure are similar to those inherent to cooling agent R22.

EFFECT: improvement of environmental properties of composition.

7 cl, 4 dwg, 9 tbl