Operation number-counting piezoelectric dispenser

摘要

Provided is an operating number-counting piezoelectric dispenser including a piezoelectric pump dispensing a liquid by using a piezoelectric element as an actuator. According to the operating number-counting piezoelectric dispenser, damages to a piezoelectric actuator may be predicted and the piezoelectric actuator may be replaced before the damages are caused, thereby preventing process loss and defective products and improving productivity.

主权项

1. An operation number-counting piezoelectric dispenser comprising:
a pump body; a lever that is rotatably installed with respect to a hinge axis installed in the pump body; a piezoelectric actuator installed in the pump body and having a tip portion that is contactable to the lever as a length of the piezoelectric actuator is increased when a voltage is applied to the piezoelectric actuator to press and rotate the lever with respect to the hinge axis; a valve rod that is liftably connected to the lever according to rotation of the lever; a valve body comprising a storing unit, into which a tip portion of the valve rod is inserted and in which a liquid is stored, an inlet, through which the liquid flows into the storing unit, and a nozzle, through which the liquid of the storing unit is discharged according to advance and retreat of the valve rod with respect to the storing unit; an operation number storing unit that is installed in the pump body and stores an unique identification number of the pump body and the number of times that the piezoelectric actuator operates as a voltage is applied to the piezoelectric actuator; and a control unit that is electrically connected to the piezoelectric actuator and the operation number storing unit and applies a voltage to the piezoelectric actuator to operate the piezoelectric actuator, and calculates operating times of the piezoelectric actuator and stores the operating times in the operation number storing unit.