Secondary atomizer for aerosol direct-writing printing and atomization method thereof
阅读说明：本技术 一种用于气溶胶直写打印的二级雾化器及其雾化方法 (Secondary atomizer for aerosol direct-writing printing and atomization method thereof ) 是由 王晗 黄力雄 于 2019-10-30 设计创作，主要内容包括：本发明涉及气溶胶直写打印领域,具体为一种用于气溶胶直写打印的二级雾化器及其雾化方法,其中,二级雾化器包括筒体,筒体的上端具有开口,侧面具有进液通道,内部具有雾化腔,进液通道与雾化腔连通；固定安装在筒体上端的喷嘴,喷嘴上具有流道,流道与雾化腔连通,流道的一端为进气通道,另一端为出料口；与筒体的下端固定连接的底座,底座与筒体围成雾化腔,雾化腔的底部设置有震荡片。本发明先使用超声雾化进行震荡分散液体的内部结构,消除液体内部的分子间作用力,然后使用气雾化的方法对其进一步地雾化,这样既能有效地缩小气溶胶的液滴直径,又能使气溶胶的浓度和密度不会因此降低,加快了雾化过程,提高了雾化效率。(The invention relates to the field of aerosol direct-writing printing, in particular to a secondary atomizer for aerosol direct-writing printing and an atomization method thereof, wherein the secondary atomizer comprises a cylinder body, the upper end of the cylinder body is provided with an opening, the side surface of the cylinder body is provided with a liquid inlet channel, the inside of the cylinder body is provided with an atomization cavity, and the liquid inlet channel is communicated with the atomization cavity; the nozzle is fixedly arranged at the upper end of the cylinder body, a flow channel is arranged on the nozzle and is communicated with the atomizing cavity, one end of the flow channel is an air inlet channel, and the other end of the flow channel is a discharge hole; and the base is fixedly connected with the lower end of the barrel, the base and the barrel enclose an atomization cavity, and the bottom of the atomization cavity is provided with a vibration piece. The invention firstly uses ultrasonic atomization to vibrate and disperse the internal structure of the liquid, eliminates intermolecular force in the liquid, and then uses an air atomization method to further atomize the liquid, thereby effectively reducing the diameter of liquid drops of aerosol, preventing the concentration and density of the aerosol from being reduced, accelerating the atomization process and improving the atomization efficiency.)
1. A secondary atomizer for aerosol direct write printing, comprising:
the liquid inlet device comprises a cylinder, wherein an opening is formed in the upper end of the cylinder, a liquid inlet channel is formed in the side surface of the cylinder, an atomizing cavity is formed in the cylinder, and the liquid inlet channel is communicated with the opening through the atomizing cavity;
the nozzle is fixedly arranged at the upper end of the barrel, a flow channel is arranged in the nozzle and is communicated with the atomizing cavity, one end of the flow channel is an air inlet channel, and the other end of the flow channel is a discharge hole;
vibrate the piece, it sets up to vibrate the piece the bottom of barrel.
2. The secondary atomizer for aerosol direct-write printing according to claim 1, further comprising a base, wherein the base is fixedly connected to the lower end of the cylinder, the atomization chamber is enclosed by the base and the cylinder, the base is provided with a mounting groove, and the oscillating plate is fixed in the mounting groove.
3. The secondary atomizer for aerosol direct-write printing according to claim 1, wherein the upper end of the cylinder is provided with a mounting spigot, the lower end of the nozzle is provided with a mounting hole, and the mounting spigot is in interference fit connection with the mounting hole.
4. The secondary atomizer for aerosol direct-write printing according to claim 1, wherein the air inlet direction of the air inlet channel is perpendicular to the oscillation direction of the oscillating plate, and the oscillating plate is an ultrasonic oscillating plate.
5. The secondary atomizer for aerosol direct-write printing according to claim 1, wherein said liquid inlet channel is located at the lower end of said cartridge body, near said base.
6. A method of atomising an aerosol using a secondary atomiser as claimed in any of claims 1 to 5, comprising the steps of:
(1) oscillating the liquid in the atomizing cavity by using high-frequency ultrasonic waves emitted by the oscillating piece;
(2) and introducing high-pressure drying gas into the gas inlet channel.
7. A method of nebulizing an aerosol according to claim 6, the high pressure drying gas being nitrogen or compressed air.
Technical Field
The invention relates to the field of aerosol direct-writing printing, in particular to a secondary atomizer for aerosol direct-writing printing and an atomization method thereof.
Background
The aerosol (aerosol) is a colloid dispersion system formed by dispersing and suspending small solid or liquid particles in a gas medium, and is also called a gas dispersion system, wherein the dispersed phase is the small solid or liquid particles with the size of 0.001-100 microns, and the dispersion medium is gas. Liquid aerosols are commonly referred to as mists, and solid aerosols are commonly referred to as mists. Aerosol direct-write printing processes are processes in which an aerosol is sequentially deposited in direct-write form on a substrate, and the first step in printing is to produce a sufficient amount of aerosol, which is typically by aerosolization. A high pressure dry gas, such as nitrogen, is continuously introduced into a container filled with liquid, and the liquid in the container is transported to a nitrogen inlet, so that the liquid is dispersed into a plurality of small liquid droplets with very small diameters, and the small liquid droplets are mostly dispersed in the gas and transported out by the gas. This results in an aerosol fluid containing many tiny droplets that are sampled and focused in a subsequent step and then deposited directly on a substrate for direct-write printing purposes. However, aerosol droplets obtained by aerosolization have a large range of droplet sizes, typically 2.5 microns to 10 microns in diameter. When high-precision aerosol direct-writing printing is required, the diameter of aerosol liquid drops is required to be relatively high, and the diameter range of the aerosol liquid drops is required to be controlled within 5 micrometers. The aerosol droplet diameter can be greatly reduced by increasing the pressure of the nitrogen gas for gas atomization. However, this has a problem. That is, the output aerosol fluid is reduced in concentration and density, resulting in a reduction in production efficiency. Moreover, increasing the pressure of the nitrogen gas increases the difficulty in implementing the subsequent process steps, and requires more material to be consumed. It is not reasonable to simply reduce the diameter of the aerosol droplets by increasing the gas pressure, which requires a new method to be developed that can make the aerosol particles small enough and ensure that the aerosol flow has a high enough concentration and density to maintain a high production efficiency.
Disclosure of Invention
In order to overcome the problems in the background art described above, the present invention provides a secondary atomizer for aerosol direct-write printing and an atomization method thereof, by which the droplet diameter of an aerosol can be effectively reduced without a resultant decrease in the concentration and density of an aerosol stream.
The invention provides a secondary atomizer for aerosol direct-writing printing, which comprises a cylinder body, a liquid inlet channel, a liquid outlet channel and an atomizing cavity, wherein the upper end of the cylinder body is provided with an opening, the side surface of the cylinder body is provided with the liquid inlet channel, the inside of the cylinder body is provided with the atomizing cavity, and the liquid inlet channel is communicated with the atomizing cavity; the nozzle is fixedly arranged at the upper end of the barrel and provided with a flow channel, the flow channel is communicated with the atomizing cavity, one end of the flow channel is an air inlet channel, and the other end of the flow channel is a discharge hole; vibrate the piece, it sets up to vibrate the piece the bottom in atomizing chamber.
Further, still include the base, the lower extreme fixed connection of base and barrel, the base encloses into the atomizing chamber with the barrel, is equipped with mounting groove on the base, vibrates the piece and fixes in mounting groove, and the base passes through bolt fixed connection with the barrel.
Further, the upper end of the cylinder body is provided with an installation seam allowance, the lower end of the nozzle is provided with an installation hole, and the installation seam allowance is connected with the installation hole in an interference fit mode.
Furthermore, the air inlet direction of the air inlet channel is perpendicular to the oscillation direction of the oscillation piece, and the oscillation piece is an ultrasonic oscillation piece.
Further, the liquid inlet channel is positioned at the lower end of the cylinder body and is close to the base.
A second object of the present invention is to provide a method for atomizing an aerosol by using any one of the above-mentioned two-stage atomizers, comprising the steps of:
(1) oscillating the liquid in the atomizing cavity by using high-frequency ultrasonic waves emitted by the oscillating piece;
(2) and introducing high-pressure drying gas into the gas inlet channel.
Further, the high-pressure drying gas is nitrogen or compressed air.
Compared with the prior art, the invention has the beneficial effects that:
(1) the two-stage atomizer is simple in structure, the vibrating piece is arranged at the bottom of the atomizing cavity, the air inlet channel is arranged at one end of the nozzle flow channel, ultrasonic atomization and air atomization can be achieved simultaneously, the air atomization is arranged at the nozzle, liquid drops entering the flow channel can be blown into liquid drops with smaller diameters, the concentration and the density of aerosol are high enough, and the production efficiency is maintained.
(2) The invention combines two different atomization methods of gas atomization and ultrasonic atomization, firstly uses ultrasonic atomization to vibrate the liquid in an atomization cavity so as to disperse the internal structure of the liquid and eliminate intermolecular forces such as molecular bonds, hydrogen bonds and the like in the liquid; then further atomizing the aerosol by using an atomization method, so that the diameter of the liquid drops of the aerosol can be effectively reduced, and the concentration and the density of the aerosol can not be reduced; and ultrasonic atomization not only plays the effect of auxiliary atomization in this in-process, but also has improved the concentration and the density of aerosol for the atomization process, improved atomization efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of the overall structure of a two-stage atomizer according to the present invention;
FIG. 2 is a view showing the internal structure of the two-stage atomizer according to the present invention;
the ultrasonic vibration device comprises a
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 2, the present embodiment provides a secondary atomizer for aerosol direct-write printing, comprising: the spray nozzle comprises a
Specifically, be equipped with mounting groove on the
Specifically, the
Specifically, the air inlet direction of the
It should be noted that the
Specifically, the
The invention also provides a method for atomizing aerosol by using any one of the two-stage atomizers, which comprises the following steps:
(1) oscillating the liquid in the atomizing cavity by using high-frequency ultrasonic waves emitted by the oscillating piece;
(2) and introducing high-pressure drying gas into the gas inlet channel.
Specifically, the high-pressure drying gas is nitrogen or compressed air. The purpose of introducing the high-pressure drying gas in this example is to disperse the rising liquid, and there is no specific requirement for the concentration.
For a clearer understanding of the present invention, the principle of aerosolization and ultrasonic atomization is first explained: the principle of gas atomization is that high-pressure dry airflow is introduced into a container, rising liquid is dispersed into a large number of small droplets by the airflow and is discharged out of the container together with the high-pressure dry airflow after being mixed, but the diameter range of the droplets generated by gas atomization is large, and the precision requirement of high-precision direct-writing printing cannot be met; the principle of ultrasonic atomization is that the liquid water molecule structure is broken up by electronic high-frequency oscillation (oscillation frequency is 1.7MHz or 2.4MHz) to generate elegant water mist, and heating or adding any chemical reagent is not needed, so that the ultrasonic atomization method belongs to a pure physical process. However, the efficiency of ultrasonic atomization is not as good as that of gas atomization, and if the ultrasonic atomization is used alone to prepare aerosol, the generated aerosol fluid has too low pressure and too low flow rate, and the subsequent direct writing process requirements cannot be met.
Based on the principle, the invention combines two different atomization methods of gas atomization and ultrasonic atomization, firstly uses ultrasonic atomization for oscillation to disperse the internal structure of liquid and eliminate intermolecular forces such as molecular bonds, hydrogen bonds and the like in the liquid; then further atomizing the aerosol by using an atomization method, so that the droplet diameter of the aerosol can be effectively reduced, and the concentration and the density of the aerosol flow can not be reduced; and ultrasonic atomization not only plays the effect of auxiliary atomization in this in-process, but also has improved the concentration and the density of aerosol for the atomization process, improved atomization efficiency.
It should be noted here that, compared with the form of performing ultrasonic atomization and aerosol atomization simultaneously, the atomization method for aerosol in the present embodiment can break down the internal structure of the liquid more sufficiently, and the effect of eliminating the internal acting force is more obvious. Because ultrasonic atomization and gas atomization are carried out at the same place, the processing time of ultrasonic oscillation is short, and then the ultrasonic oscillation is dispersed by high-pressure airflow and transported out, so that the dispersing effect is very small. The invention firstly carries out ultrasonic oscillation treatment to fully collapse the internal structure of the liquid, then transports the liquid to the atomizing nozzle, and forms aerosol fluid with more dispersed fog particles and smaller diameter through the impact of high-pressure airflow.
The present invention has been further described with reference to specific embodiments, but it should be understood that the detailed description should not be construed as limiting the spirit and scope of the present invention, and various modifications made to the above-described embodiments by those of ordinary skill in the art after reading this specification are within the scope of the present invention.
- 上一篇：一种医用注射器针头装配设备
- 下一篇：一种保护船体舱室用甲板敷料的涂抹装置