Piezoelectric pump for household electric appliance

Piezoelectric pump for a household electric appliance, said piezoelectric pump comprising a moving wall interposed between a first casing element defining a pumping chamber with said moving wall and a second casing element applying pressure against the periphery of the moving wall in order to hold the latter in position, said moving wall comprising an exterior face in contact with a piezoelectric actuator designed to move said moving wall so as to bring about a periodic variation in the volume of the pumping chamber by means of said piezoelectric actuator, the piezoelectric element further comprising a third element covering the first element oppositely disposed relative to the second element, said third element comprising a deliver line and a discharge line communicating with an inlet and an outlet of the pumping chamber, respectively, wherein said first casing element and said second casing element are held together under stress by means of an elastic clip, said elastic clip applying a pressure that tends to compress said first casing element onto second casing element.