Orifice piece and atomization assembly with same

Abstract

The invention discloses an orifice piece and an atomization assembly with the same. The atomization membrane assembly is arranged on a cavity and comprises a piezoelectric ring piece, a brake ring piece and the orifice piece, wherein the brake ring piece is arranged on one side of the piezoelectric ring piece; the orifice piece is disc-shaped, clamped between the piezoelectric ring piece and the brake ring piece and provided with a plurality of triggering holes and first upheaval parts; and the plurality of first upheaval parts are non-circular and protrude and stretch convexly towards the direction of the piezoelectric ring piece or the brake ring piece to form a multi-curve structure arranged in a radiation or ring shape with a specific geometric modeling pattern. Therefore, the orifice piece can be used for enlarging the atomization region and improving the atomization quantity and the liquid-gas exchange efficiency, and can be prevented from being cracked since stress is excessively concentrated at the center of the orifice piece during vibration.

Description

technical field [0001] The invention belongs to the field of atomizers, and particularly relates to an orifice sheet with a radial or circular arrangement of geometric patterns in the center of the orifice sheet and an atomization assembly using the multi-curved surface structure. Background technique [0002] The atomizer, such as the common ultrasonic atomizer, is mainly composed of piezoelectric (PZT) ceramics made of lead zirconate titanate. After a voltage is input, the ceramic body and the attached metal back plate will undergo telescopic deformation. The energy is transmitted in the form of waves, making it work at the frequency of ultrasonic waves, and its amplitude is in the range of microns, which is controlled by the input voltage. The vibration generated by the piezoelectric material is used to transmit the ultrasonic wave to the orifice sheet, so that the liquid near the orifice is subjected to the Rayleigh Wave (Rayleigh Wave) or surface wave, and the liquid is...

AI Technical Summary

Problems solved by technology

[0005] 1. When the piezoelectric ring 113 vibrates, the transmission direction of the vibration wave generated is from the outer edge of the orifice plate 112 to the center, resulting in excessive concentration of vibration energy at the center of the orifice plate 112 , causing the central area of ​​the orifice plate 112 to have too large a vibration amplitude, which is easily broken due to stress concentration, and thus shortens the service life

[0006] 2. Since the vibration energy is concentrated at the center of the orifice plate 112, the atomization area can only be formed near the center of the orifice plate 112

Because the atomization area is only formed at the center of the orifice plate 112, the effective use of the multiple percussion holes 1121 on the orifice plate 112 is reduced, and the amount of atomization is not good

[0007] 3. During the atomization process, the liquid and gas must be exchanged to maintain the balance of the internal and external pressure difference of the atomization device. Because the atomization area is too small, the spray state is unstable, and the spray volume is easy to fluctuate.

[0008] 4. Due to the excessive concentration of the spray area in the central area, the density of the atomized liquid molecules is excessively concentrated, and it is easy to make the droplets collide together, and combine to form large-sized droplets, resulting in a decrease in the atomization efficiency

However, the effective atomization range will be reduced

If you want to increase the effective atomization range, you must increase the processing curvature radius, resulting in shallower processing depth and poorer atomization performance.

If the depth that can be processed with a smaller radius of curvature can be achieved under the same size, the orifice sheet 22 is easily subjected to excessive stress, causing the structural deformation to exceed its limit and rupture, or because the yield strength decreases, after repeated vibrations many times and burst

[0012] 2. Due to the characteristics of the material of the orifice plate 22, if the diameter of the hemispherical surface is longer after processing, the structural tension will also decrease, resulting in weakened input force, and the ability to resist low-frequency resonance will also decrease, which is easy to cause concomitant noise phenomenon

In addition, when the piezoelectric ring piece 21 is actuated, since the glue between the piezoelectric ring piece 21, the nozzle hole piece 22 and the brake ring piece 23 is of unequal length due to the force arm, it is easy to Failure of the adhesive force between the components during operation

[0014] 4. Due to the design of the hemispherical surface structure of the nozzle hole sheet in the prior art, after the vibration wave energy is transmitted, most of it will still be concentrated in the central area, so that only the micropores located in the central part can effectively move, while the micropores in the peripheral area Micropores cannot be used effectively due to insufficient vibration energy, resulting in the atomization area not reaching the original design area

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