| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a reliable fluid injection device of a simple structure. <P>SOLUTION: The fluid injection device 1 includes: a pulse generation section 100 that includes a fluid chamber 501 changeable in the volume thereof, and an inlet flow passage 503 and an outlet flow passage 511 connected to the fluid chamber 501; a connection flow passage 201 provided with a fluid injection opening 212 connected to the outlet flow passage 511 at one end part and having another end part made smaller than diameter of the outlet flow passage 511; a connection flow passage tube 200 including the connection flow passage 201 and having rigidity adequate to transmit pulses of fluid flowing from the fluid chamber to the fluid injection opening 212; and a pump 20 that supplies fluid to the inlet flow passage 503. Inertance of the inlet flow passage 503 is established larger than inertance of the outlet flow passage 511. Also, the inlet flow passage 503 constructs a swirl flow generation part generating swirl flow in the fluid chamber 501. <P>COPYRIGHT: (C)2008,JPO&INPIT |
