Device for producing a mixture of sterilizing gases, in which the gas mixture (G) is generated from a first gaseous component (F1) as a continuous phase, in particular air (AR) such as sterile air (AS), and a second liquid component (F2 ') as a dispersed phase, in particular a sterilizing agent such as hydrogen peroxide (H2O2'), in a predefined proportion (F1 / F2 '), with a spray and storage tank (1.1) with a fixed storage volume (V), in which the second liquid component (F2 ') is sprayed and mixed homogeneously with the gaseous component (F1), the dispersed system produced in this way being found, that is, the aerosol (A； F1, F2 '； AR, H2O2'； AS, H2O2 '), in the fixed storage volume (V) at a constant pressure and feeding the obtained fluid (A； F) to a distribution device (30) and discharging from it in a controlled manner according to needs, compensating the loss d and pressure in the storage tank (1.1) when the distribution device (30) is opened by the subsequent supply of the first gaseous component (F1) with the simultaneous supply and addition of the second liquid component (F2 ') in the predefined proportion ( F1 / F2 '), a tank (1) being composed in its upper part of the spray and storage tank (1.1) which is transformed below, by its discharge end, into an evaporation tank (1.2) with a heating device (2), presenting the spray and storage tank (1.1) at least one controlled spray nozzle (3； 3.1, 3.2) which has a connection to feed the first gaseous component (F1) and a connection to feed the second liquid component (F2 '), a pressure regulating device (14) being assigned to the tank (1) which, depending on the requirements of the distribution device (30) activates the at least one spray nozzle (3； 3.1, 3.2) and maintains the preset constant pressure (p2>； = pA) by feeding the first gaseous component (F1) and the second component liquid (F2 ') in the predefined proportion (F1 / F2'), characterized in that the distribution device (30) comprises a dosing valve
