| 摘要 |
According to a method of cooling gases, in particular air which is drawn in through a compressor, in a compressed air arrangement the gas flows alternately through at least one of a plurality of refrigerating driers (5, 6) equipped with heat exchangers (15, 16). The gas drawn in is cooled by means of a heat exchanger (15, 16) to below 0.degree.C over a cooling section. Whilst the gas is being cooled, the ice produced in the refrigerating drier (5,6) is defrosted by at least one of the refrigerating driers (5, 6) or in the further refrigerating drier(s) (5, 6) by the supply of a hot refrigerant vapour. The liquid refrigerant flowing out of the refrigerating drier (5, 6) to be defrosted is introduced into a pressure and/or connection line (17, 18) of the refrigerant circuit between the inlet of the heat exchanger (15, 16) used for cooling the gas drawn in and the condenser (59), which is arranged upstream of this (these) heat exchangers, or the tank. The invention also concerns a further method in which the nominal temperature is higher at the corresponding nominal pressure of the refrigerant emerging from the heat exchanger used for cooling the gas drawn in than the nominal temperature corresponding to the nominal pressure of this refrigerant.
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