Piezoelectric gas ejecting device
A piezoelectric gas jet generator includes a piezoelectric vibrator and upper and lower volume-varying chambers formed above and below the piezoelectric vibrator. In order to effectively use the movement of air supplied with the vibration of the piezoelectric vibrator, plural upper supply pipes and lower supply pipes communicating with the upper and lower volume-varying chambers and protruding from an upper housing and a lower housing are made to protrude in a direction parallel to the plane of the piezoelectric vibrator so as to be parallel to each other. Here, the upper supply pipes and the lower supply pipes are located at different planar positions.
1. A piezoelectric gas jet generator comprising:
a piezoelectric vibrator;
upper and lower housings configured to form volume-varying chambers above and below the piezoelectric vibrator, respectively; and
upper supply pipes and lower supply pipes communicating with the upper and lower volume-varying chambers and protruding from the upper and lower housings, respectively,
wherein the upper supply pipes and the lower supply pipes protrude in a direction parallel to a plane of the piezoelectric vibrator so as to be parallel to each other, and
wherein the upper supply pipes and the lower supply pipes are disposed at different planar positions.
2. The piezoelectric gas jet generator according to claim 1 , wherein an inter-axis distance between the upper supply pipes and the lower supply pipes in a direction perpendicular to the piezoelectric vibrator is set to be smaller than two times the outer diameter of the supply pipes.
3. The piezoelectric gas jet generator according to claim 1 , wherein the upper supply pipes and the lower supply pipes have the same pitch and the lower supply pipes are located between the upper supply pipes in a planar view.
4. The piezoelectric gas jet generator according to claim 1 , wherein the upper supply pipes and the lower supply pipes have the same length and ends thereof are opened at the same planar position.