Purge circuit of a fuel cell

A method for operating a purging circuit for purging an anodic compartment of an electrochemical cell of a fuel cell, this circuit including:

• a volume, having connexity, of at least equal to 300 ml, containing and homogenising a recovery gas comprising hydrogen and an inert gas, said volume comprising a first inlet and a first outlet;
• a first nonreturn valve connected to the first outlet of said volume containing a recovery gas, said first nonreturn valve preventing a gas from being introduced into said volume through the first outlet and further allowing a part of a gas to be flown, from the first outlet to an inlet of the anodic compartment;
• a second nonreturn valve connected to the first inlet of said volume for containing a recovery gas, preventing a gas from being discharged, from said volume, through the first inlet;
• said method including:
• measuring with a pressure sensor a pressure of a fluid present in said purging circuit;
• a valve allowing a supply gas to be flown to the inlet of said compartment, or prohibiting it from flowing to said inlet, as a function of pressure data of said pressure sensor.