| 摘要 |
PROBLEM TO BE SOLVED: To provide a system and a method for jetting a fluid which have improved performance characteristics. SOLUTION: A piston arrangement 110 is set movably to the inside of a fluid small chamber 120. A movement of the piston arrangement 110 towards a static face plate 130 presses a part of a fluid 140 between the piston arrangement 110 and the static face plate 130 to the outside from a nozzle hole 132 of the static face plate 130, whereby droplets or a jet of the fluid 140 is formed. A viscous force generated by a flow of the fluid along an action surface of the piston arrangement 110 moving towards the nozzle hole 132 or away from the nozzle hole 132 generates a force resisting to the movement of the piston arrangement 110. The resistance force tends to decelerate the movement of the piston arrangement 110 and to prevent the piston arrangement 110 from touching the static face plate 130. The fluid small chamber 120 is constituted of a cylinder arrangement in various embodiments.
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