| 摘要 |
The present invention provides a discharge mechanism (3) comprising a drive unit (28) that moves a rod (30) reciprocally, and a discharge unit (29) including a liquid chamber (44) allowing the rod (30) to pass therein and a valve seat communicated with a nozzle (48), the nozzle (48) discharging therefrom a liquid mixed with solid particles with an operation of moving the valve seat (45) and a tip of the rod (30) relatively away from each other, wherein the discharge unit (29) includes an inflow path (52) through which the liquid mixed with the solid particles flows into the liquid chamber (44), and an outflow path (53) through which the liquid mixed with the solid particles in the liquid chamber (44) flows out, the inflow path (52) and the outflow path (53) are connected in a V-shape, the liquid chamber (44) is disposed in a valley portion of the V-shape, and the valve seat (45) is disposed at a lower end of the V-shape. Such an arrangement prevents precipitation and accumulation of the solid particles in a circulation path within the discharge unit. |
