FIELD: machine engineering.
SUBSTANCE: liquid storage unit comprising: a first liquid storage chamber having a constant volume and capable of retaining fluid supplied from the fluid reservoir; a second liquid storage chamber communicating with the first liquid storage chamber; a pressure control chamber adapted to vary the pressure in the pressure control chamber by actuating a pressure control unit; and an elastic element adapted to be fluid-tight separation of the second pressure chamber and the storage of each other and the deformation of the control chamber so as to increase and decrease the volume of the second liquid storage chamber in accordance with the pressure control chamber pressure.
EFFECT: elastic element is capable of removing bubbles in the first liquid storage chamber, by increasing and decreasing the volume of the second liquid storage chamber via deformation.
20 cl, 20 dwg
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