Patent ID: 8813769

Claim:
Method for putting in solution a concentrate in the powdery state contained in a receptacle provided with a single opening, the method comprising: causing a liquid coming from a source of liquid to enter the receptacle through the single opening, and then extracting an enriched solution of the concentrate in the liquid via the same single opening by suction, wherein the liquid is introduced into the receptacle by passing through a venturi tube comprising a convergent chamber, a vacuum tapping and a divergent chamber, the liquid entering the tube through the convergent chamber of the tube and leaving the tube through the vacuum tapping of the tube, before entering the receptacle, wherein the suction of the enriched solution is obtained by causing pressurised liquid to flow in the venturi tube between the convergent chamber and the divergent chamber, measuring the pressure between the vacuum tapping of the venturi tube and the receptacle by means of a pressure sensor, and controlling opening and closing of a valve according to the degree of filling the receptacle as a function of a pressure signal supplied by the pressure sensor to the valve via a control line, the valve being disposed in an extraction pipe a first end of which is connected to the divergent chamber of the venturi tube.