Piezoelectric ceramic ultrasonic atomization sheet

Abstract

The invention discloses a piezoelectric ceramic ultrasonic atomization sheet, which adopts two atomization units, in each atomization unit, one piezoelectric ceramic sheet is bonded with one metal membrane, and dense conical atomization holes are arranged in each metal membrane. One group of piezoelectric ceramic sheet is arranged on the small diameter end of the conical holes, and the other group of the ceramic sheet of the piezoelectric ceramic sheet is arranged on the large diameter end of the conical holes. The two piezoelectric ceramic sheets are stacked together so as to form the structure of the piezoelectric ultrasonic atomization sheet, the thickness of the metal membrane is correspondingly increased, the cavity volume of each conical atomization hole is enlarged, thus the improvement of the atomization amount is facilitated, and the atomization effect is improved. Meanwhile, by the adoption of the micro and thin absorption elastomer between metal membranes, a large noise caused by direct contact when the metal membranes deform is prevented, and the sealing function is realized.

Description

technical field [0001] The invention relates to a device for atomizing liquid, in particular to an atomizing sheet which adopts a piezoelectric ceramic sheet for ultrasonic atomization. [0002] technical background [0003] The process of breaking up liquid into mist droplets is called atomization, which is a kind of energy conversion process. There are many transducers used for atomization in practice, such as ultrasonic atomization transducers, compression atomization transducers, etc. However, with the maturity of piezoelectric materials and piezoelectric theory, piezoelectric ultrasonic transducers are widely used. The atomizing sheet used in the present invention is exactly a piezoelectric ceramic ultrasonic transducer. [0004] Most of the piezoelectric ultrasonic atomizing sheets used at this stage are single-layer metal diaphragms bonded with single ceramic sheets ( figure 2 ) or a single-layer metal sheet double-sided bonded ceramic sheet ( figure 1 ). Afte...

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Problems solved by technology

However, the size parameters of the atomizing sheet used at this stage are relatively fixed, and the thickness of the metal diaphragm cannot be changed, which increases the impact on vibration and reduces the service life of the atomizing sheet; the cone angle of the atomizing hole adopts an optimal The angle cannot be changed; in addition, the small diameter of the conical atomizing hole is limited by the size of the atomized particles, which is relatively unchanged

These factors are extremely unfavorable to the further improvement of atomization amount and atomization effect

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