Process for regulating an oxygen production unit by comparison of the differential pressures characteristic of different adsorbers

A process for regulating a unit for the production of oxygen from atmospheric air comprising N adsorbers, N being = or >2, each following a PSA, VSA or VPSA adsorption cycle, with an offset of a phase time, said regulation process comprising the following steps:

• a) continuously measuring the differential pressure between at least two points chosen between the inlet and the outlet of the adsorber for each adsorber (i), during at least one step of the adsorption cycle chosen from equalization, feed elution, or repressurization, the measurement points being identical for each of the N adsorbers;
• b) determining at least one value of differential pressure characteristic of the step chosen in step a) which is chosen from the differential pressures measured in step a) or a function of those pressures;
• c) calculating the difference(s) between the values of the characteristic differential pressure determined for each of the adsorbers in step b);
• d) comparing this or these differences relative to a corresponding target value(s);
• and
• e) correcting a parameter of the cycle of at least one adsorber in order to modify the transfer of at least one oxygen-rich gas stream between adsorbers or optionally between adsorber and storage tank in such a way as to eliminate said difference, in the event of a dissimilarity between the value of this or of these differences and the target values.