Patent ID: 7942650

Claim:
A liquid discharge control apparatus, comprising: a piezoelectric type diaphragm pump having a discharge valve which is opened and closed by a pressure difference and a piezoelectric element that serves as a driving actuator; and a first accumulator that communicates with an outlet of the diaphragm pump, and has a liquid accumulation cavity and a movable member which is elastically deformed by variation of a quantity of a liquid flowing into the liquid accumulation cavity so as to increase and decrease a volume of the liquid accumulation cavity corresponding to an increase and decrease of the quantity of the liquid, wherein the movable member has a center portion which is elastically deformable by a pressure of the liquid and a peripheral portion fixed on a housing; the center portion has an initial equilibration state which is previously concaved in a predetermined direction and a deformed equilibration state which is previously convexed in an opposite direction; and the movable member is deformed between the initial equilibration state and the deformed equilibration state, the discharge valve of the diaphragm pump and the movable member of the first accumulator being unified, the outlet of the diaphragm pump being directly connected to an inlet of the accumulator with no connection path.