Abstract
In this study, we examined the use of a dynamic micro-tapered hole as a micro-scale tapered flow tube valveless piezoelectric pump. Firstly, we obtained photographs of a micro-tapered hole by using an environmental scanning electron microscope (ESEM). Then, we explained the pump effect of the micro-tapered hole, and derived the atomization rate equation. Furthermore, we reported an atomization rate measurement experiment that eliminated the atomization caused by a pressure increase, and demonstrated that a change in the volume of a micro-tapered hole could produce atomization. The experimental results indicate that, under the same voltage, the forward atomization rate is much higher than the reverse atomization rate and that the atomization rate increases with the micro-tapered hole volume. The experimental results show that the atomization of the micro-tapered aperture atomizer is caused by its pumping effect. Moreover, the flow resistance and volume of the micro-tapered hole can affect the atomization rate.
Highlights
Ultrafine atomization is an important technique in inhalation therapy [1,2], spray drying [3], mass spectrometry [4], printed circuits [5], three-dimensional (3D) prototyping [6], and precise surface coating [7,8].The micro-tapered aperture atomizer is a new device used for ultrafine atomization
We find that changes in the micro-aperture hole z2 volume, the operating frequency, and the flow resistance affect the atomization rate
Operation, thetocontinuous volume in thedirection micro-tapered hole a pumping effectthe to measurement of the atomization rate, the atomizer was placed on a high-precision analytical continuous variation the micro-tapered produced a pumping thereby effect to move the liquid move the volume liquid from the in cotton stick to thehole external environment, producing the balance, a stopwatch used to time thewe power supply to atomization the atomizer
Summary
Ultrafine atomization is an important technique in inhalation therapy [1,2], spray drying [3], mass spectrometry [4], printed circuits [5], three-dimensional (3D) prototyping [6], and precise surface coating [7,8]. The concept of a dynamic cone angle, volume variation in the liquid and thehas micro-tapered hole, andThe thevolume difference between proposed in the previous studychamber by our group, been demonstrated. Experimental verification resistance and the reverse flow resistance of the micro-tapered hole are considered as has the been carried out. We designed a new experiment to directly measure the atomization rate caused by the volume variation in the micro-tapered micro-tapered hole. The forward forward andatomization reverse atomization rates were the results that hole the and reverse rates were measured, andmeasured, the results and suggested that thesuggested micro-tapered micro-tapered hole and its variation played an important role in the atomization process.
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