| 摘要 |
PURPOSE: An apparatus and a method for discharging liquid are provided to eliminate influence of discharge amounts depending on changes in liquid level of a liquid storage tank and to improve discharge accuracy of a liquid discharging apparatus. CONSTITUTION: The liquid discharging apparatus comprises a pump body(1) incorporating an elastically deformable pump member therein and having a pump chamber expanding and contracting by the pump member; an inflow passage(7) provided between the pump chamber and a liquid storage tank(6) containing liquid, and provided with such an inflow side valve(8) as to open when the pump member executes an operation of a suction stroke; a pressure regulating passage(10) provided between the pump chamber and a pressure regulating opening portion(11), and provided with such a pressure regulating valve(9) as to open when the pump member executes a discharging operation of an exhaust stroke and to keep pressure inside the pump chamber constant; and a discharge passage(14) provided between a discharge nozzle(13) and the pump chamber, and provided with such a discharge side valve(15) as to open when the pump member executes an operation of a discharge stroke.
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