Fluid injection device

摘要

A fluid injection device includes: a pulse generation section that includes a fluid chamber whose volume is changeable, and an inlet flow passage and an outlet flow passage that are connected to the fluid chamber; a first connection flow passage connected to the outlet flow passage, having an end portion; a second connection flow passage connected to the inlet flow passage; a fluid injection opening formed at the end portion of the first connection flow passage, having a diameter smaller than the diameter of the outlet flow passage; a connection flow passage tube including the first connection flow passage and having rigidity adequate to transmit pulses of fluid flowing from the fluid chamber to the fluid injection opening; and a pressure generation section that supplies fluid to the inlet flow passage.

主权项

1. A fluid injection device comprising:
a fluid chamber to which fluid is configured to be supplied; an actuator configured to change a pressure in the fluid chamber; an inlet flow passage and an outlet flow passage connected to the fluid chamber; a fluid injection opening connected to the outlet flow passage; and a fluid supply pump connected to the inlet flow passage and configured to supply fluid to the fluid chamber, wherein an inertance of the inlet flow passage is greater than that of the outlet flow passage, and wherein flow passages between the fluid supply pump and the fluid chamber include no check valve that is configured to shut the flow passages between the fluid supply pump and the fluid chamber based on increase of the pressure in the fluid chamber.