DISHWASHER WITH LOW CONSUMPTION OF NET-WATER WITH REGENERATION BY MEMBRANE FILTERING OF A SOLUTION OF RECYCLING ALREADY IN USE IN THE DISHWASHER

Dishwasher (10) of the type comprising washing nozzles (11), rinsing nozzles (12) and a washing tank (13) associated with the washing nozzles (11), such that on the one hand the solution delivered by the washing nozzles (11) is collected in the washing tank (13) and on the other the washing nozzles (11) are supplied by the solution collected in the washing tank (13); there being provided a net water inlet (14) and a membrane filter (15); the membrane filter (15) comprising an inlet for a solution to be filtered (16), a first outlet for a permeate solution (17) and a second outlet for a concentrated solution (18) in which the permeate solution (17) is supplied to the rinsing nozzles (12); wherein a three-way valve (19) is provided upstream of the inlet of the membrane filter (15); the three-way valve (19) is supplied along an inlet way by the net water (14) and along another inlet way by a recycle solution (20) already in use in the dishwasher (10), in such a way that the solution to be filtered (16) delivered along an outlet way of the three-way valve (19) and input to the membrane filter (15) can selectively consist of: - net water (14) only; - the recycle solution (20) only; - a mixture of net water (14) and the recycle solution (20).