초록 ▼

Refrigerant fluids that can be used in different types of compression systems. A composition including between 36 and 39 wt. % of difluromethane (HFC-32), between 28 and 32 wt. % of pentafluoroethane (HFC-125), and between 31 and 35 wt. % of tetrafluoroethane (HFC-134a). The composition may be used

Refrigerant fluids that can be used in different types of compression systems. A composition including between 36 and 39 wt. % of difluromethane (HFC-32), between 28 and 32 wt. % of pentafluoroethane (HFC-125), and between 31 and 35 wt. % of tetrafluoroethane (HFC-134a). The composition may be used as a replacement for R-404A.

대표청구항 ▼

1. A composition comprising: a. from 36 to 39% by weight of difluoromethane (HFC-32);b. from 28 to 32% by weight of pentafluoroethane (HFC-125);c. from 31 to 35% by weight of tetrafluoroethane (HFC-134a). 2. The composition as claimed in claim 1, in which the sum of the weights of the compounds HFC-

1. A composition comprising: a. from 36 to 39% by weight of difluoromethane (HFC-32);b. from 28 to 32% by weight of pentafluoroethane (HFC-125);c. from 31 to 35% by weight of tetrafluoroethane (HFC-134a). 2. The composition as claimed in claim 1, in which the sum of the weights of the compounds HFC-32, HFC-125 and HFC-134a is equal to 100%. 3. The composition as claimed in claim 1, consisting of: a. 37% by weight of difluoromethane (HFC-32);b. 30% by weight of pentafluoroethane (HFC-125);c. 33% by weight of tetrafluoroethane (HFC-134a). 4. A refrigeration process comprising the use of a composition as claimed in claim 1 as refrigerant. 5. The refrigeration process use as claimed in claim 4, wherein the refrigerant is a replacement for R-404A. 6. A refrigeration process comprising the following stages: a. condensation of a composition as claimed in claim 1;b. evaporation of said composition. 7. The process as claimed in claim 6, in which the condensation stage is carried out at a temperature of greater than 13° C. 8. The process as claimed in claim 6, in which the evaporation stage is carried out at a temperature of less than or equal to −10° C. 9. A device for transfer of heat in a compression cycle including the composition as claimed in claim 1. 10. The process as claimed in claim 6, in which the condensation stage is carried out at a temperature of greater than 24° C. 11. The process as claimed in claim 10, in which the evaporation stage is carried out at a temperature of less than or equal to −10° C. 12. The process as claimed in claim 7, in which the evaporation stage is carried out at a temperature of less than or equal to −10° C.