Multi-sound source atomization device and method

Abstract

The present invention relates to the technical field of fine atomization of large-flow liquids, and specifically to a multi-sound source atomization device and method, comprising an ultrasonic output module, a liquid supply module, an ultrasonic transducer multi-sound source array, and a multi-sound source matching resonant atomization chamber; the ultrasonic output module is used to output a high-frequency signal and convert it into an alternating signal with a constant frequency and increased amplitude, the liquid supply module is used to stably output droplets, the ultrasonic transducer multi-sound source array is used to convert the alternating signal into a high-frequency, large-amplitude ultrasonic signal, and the multi-sound source matching resonant atomization chamber is used to couple and superimpose the ultrasonic signals, output an enhanced sound field, and realize ultrafine atomization of large-flow liquids. The present invention is aimed at the atomization scenario of large-flow and viscous liquids, and proposes a non-contact atomization device and method with multi-sound source collaboration, which can ensure the particle size concentration while effectively solving the problem of nozzle blockage, and at the same time, by obtaining a higher sound field intensity, achieve fine atomization of large-flow liquids and improve atomization efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of fine atomization of large-flow liquids, and in particular to a multi-sound source atomization device and method. Background Art

[0002] Ultrasonic atomization is a highly efficient and important atomization technology. It uses high-frequency ultrasonic vibrations to disperse liquid into tiny droplets, creating an atomized state. Its high atomization precision holds promise for broad applications in drug atomization, pesticide spraying, environmental humidification, and semiconductor thin film coating.

[0003] Currently, commonly used ultrasonic atomization methods include piezoelectric ceramic transducer-based ultrasonic atomization and dynamic micropore atomization. Transducer atomization utilizes the inverse piezoelectric effect of piezoelectric ceramics to convert an input electrical signal into a high-frequency vibration signal. This signal is then amplified by a horn to generate high-frequency, high-amplitude mechanical oscillations. This energy is then transferred to the liquid film surface at the transducer tip, generating high-frequency vibrations that break up the liquid into droplets. Ultrasonic atomization using piezoelectric ceramic transducers produces larger droplet size and lacks guaranteed particle size concentration. Dynamic micropore atomization utilizes piezoelectric ceramics to drive a vibrating membrane with a micropore array, generating high-frequency reciprocating vibrations. This in turn squeezes the liquid in the reservoir and ejects it through the vibrating micropore array, forming uniform, tiny droplets. This method achieves excellent droplet size and concentration. However, micropore size directly influences droplet characteristics. Excessively small micropores increase the risk of nozzle clogging during atomization. Furthermore, the micropore size limits the atomization flow rate, which in turn restricts its application. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a multi-sound source atomization device and method.

[0005] The multi-sound source atomization device of the present invention comprises an ultrasonic output module, a liquid supply module, an ultrasonic transducer multi-sound source array and a multi-sound source matching resonant atomization cavity;

[0006] The ultrasonic output module is used to output a high-frequency signal and convert it into an alternating signal with a constant frequency and increased amplitude;

[0007] The liquid supply module is used to stably output liquid droplets;

[0008] The ultrasonic transducer multi-source array is used to convert the alternating signal into a high-frequency, large-amplitude ultrasonic signal;

[0009] The multi-sound source matching resonant atomization cavity is used to couple and superimpose ultrasonic signals, output an enhanced sound field, and realize ultrafine atomization of a large flow rate of liquid.

[0010] The ultrasonic output module includes an ultrasonic generating unit and an ultrasonic driving unit. The ultrasonic generating unit is used to output a high-frequency signal. The ultrasonic driving unit is used to drive the ultrasonic transducer multi-source array to convert the above-mentioned high-frequency signal into an alternating voltage signal with a constant frequency and increased amplitude.

[0011] The alternating voltage signal may be a sinusoidal or square wave periodic signal.

[0012] The liquid supply module includes a liquid pump controller, a liquid supply pump and a liquid supply microneedle, and stably outputs liquid droplets at the end of the liquid supply microneedle.

[0013] The transducer multi-source array includes a plurality of transducers.

[0014] The transducer may be one or more of a piezoelectric transducer and a magnetostrictive transducer.

[0015] The piezoelectric transducer consists of a piezoelectric ceramic stack, front and rear end covers, and a horn; the entire transducer length should meet 1 / 4 wavelength or an integer multiple of 1 / 4 wavelength, thereby reducing the impedance of the connecting surface under resonance; the horn is made of a material with excellent acoustic properties, which can be aluminum, aluminum alloy or titanium alloy.

[0016] The multi-sound source matching resonant atomization cavity can be a multi-sound source rectangular atomization cavity, a multi-sound source cylindrical atomization cavity or a multi-sound source spherical atomization cavity according to experimental requirements, atomizing nozzle size requirements, flow requirements or atomization scale requirements.

[0017] The multi-sound source atomization method of the present invention specifically includes the following steps:

[0018] Step 1: Build an atomization experimental platform, connect and fix the ultrasonic transducer multi-source array and the matching multi-source matching resonant atomization cavity on the experimental platform, and connect the ultrasonic drive unit and the liquid supply module;

[0019] Step 2: Turn on the ultrasonic driving unit and input the input voltage and frequency of the multiple transducers of the ultrasonic transducer multi-source array; first output a high-frequency signal through the ultrasonic generating unit of the ultrasonic output module, and then drive the multiple transducers of the ultrasonic transducer multi-source array through the ultrasonic driving unit of the ultrasonic output module to generate an alternating signal with a constant frequency and increased amplitude, thereby obtaining a high-frequency and high-amplitude sound wave;

[0020] Step 3: Adjust the parameters of each transducer and the multi-source matching resonant atomization cavity to achieve a stable enhanced sound field in the cavity; through the multi-source matching resonant atomization cavity, the high-frequency and high-amplitude sound waves are coupled and superimposed to form an enhanced stable sound field, further enhancing the multi-source sound field;

[0021] Step 4: Turn on the liquid pump controller and the liquid supply pump to ensure that the end of the liquid supply microneedle stably outputs droplets, thereby breaking up and atomizing the droplets stably outputted from the end of the liquid supply microneedle in the cavity to achieve fine atomization.

[0022] The parameters that need to be adjusted in step 3 are:

[0023] For a multi-source rectangular atomization chamber, the parameters that need to be adjusted are: the distance H between the piezoelectric transducer or magnetostrictive transducer and the lower wall of the atomization chamber, the height D of the multi-source rectangular atomization chamber, the inner cavity length Ls of the multi-source rectangular atomization chamber, and the height h of the multi-source matching resonant atomization chamber.

[0024] For a multi-source cylindrical atomizer chamber, the parameters that need to be adjusted are: the distance H between the piezoelectric transducer or magnetostrictive transducer and the lower wall of the atomizer chamber, the diameter R of the multi-source cylindrical atomizer chamber, the inner length Ls of the multi-source cylindrical atomizer chamber, and the height h of the multi-source matching resonant atomizer chamber.

[0025] For the multi-sound source spherical atomization cavity, the parameters that need to be adjusted are: the radius r of the multi-sound source spherical atomization cavity and the height h of the multi-sound source matching resonant atomization cavity.

[0026] Compared with the prior art, the present invention has the following beneficial technical effects:

[0027] Fine atomization technology typically places extremely high demands on the particle size and concentration of atomized droplets. Traditional transducer atomization and vibrating film microporous atomization cannot guarantee particle size concentration and present the risk of nozzle clogging. This invention addresses the atomization of large-flow and viscous liquids by proposing a multi-sound source collaborative atomization device and method. This multi-sound source collaborative non-contact atomization device can ensure particle size concentration while effectively resolving the nozzle clogging issue. Furthermore, by achieving higher sound field intensity, fine atomization of large-flow liquids is achieved, improving atomization efficiency.

[0028] The present invention simultaneously inputs sound waves through multiple transducers and utilizes a resonant atomization cavity matched therewith to couple and superimpose multiple sound sources inside the cavity, thereby forming an enhanced stable sound field.

[0029] The present invention uses microneedles to supply liquid to the atomization cavity, and the liquid droplets at the end of the microneedles use acoustic energy to achieve ultra-fine and high-precision atomization, thereby improving the atomization accuracy and the interchangeability of the device.

[0030] The device of the present invention has a simple structure, strong stability, and low cost, and has great optimization and expansion space. It can couple and superimpose any number of sound sources and match corresponding resonant atomization devices to meet different practical needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a flow chart of the multi-sound source atomization method of the present invention;

[0032] Figure 2 It is a cross-sectional view of a rectangular atomization chamber with multiple sound sources;

[0033] Figure 3 It is a cross-sectional view of a cylindrical atomization chamber with multiple sound sources;

[0034] Figure 4 It is a cross-sectional view of a multi-sound source spherical atomization cavity;

[0035] In the figure, 1. Ultrasonic output module; 11. Ultrasonic generating unit; 12. Ultrasonic driving unit; 2. Liquid supply module; 21. Liquid pump controller; 22. Liquid supply pump; 23. Liquid supply microneedle; 3. Ultrasonic transducer multi-source array; 31. Transducer A; 32. Transducer B; 4. Multi-source matching resonant atomization cavity; 42. Multi-source rectangular atomization cavity; 43. Multi-source cylindrical atomization cavity; 44. Multi-source spherical atomization cavity. DETAILED DESCRIPTION

[0036] The present invention will be described in detail below with reference to specific embodiments and the accompanying drawings, but the protection scope of the present invention is not limited by the specific embodiments and the accompanying drawings. Example

[0037] The multi-sound source atomization device of the present invention includes an ultrasonic output module 1, a liquid supply module 2, an ultrasonic transducer multi-sound source array 3 and a multi-sound source matching resonant atomization cavity 4; the ultrasonic output module 1 is used to output a high-frequency signal and convert it into an alternating signal with a constant frequency and increased amplitude; the liquid supply module 2 is used to stably output droplets; the ultrasonic transducer multi-sound source array 3 is used to convert the alternating signal into a high-frequency, large-amplitude ultrasonic signal; the multi-sound source matching resonant atomization cavity 4 is used to couple and superimpose the ultrasonic signals, output an enhanced sound field, and realize ultrafine atomization of a large flow of liquid.

[0038] The ultrasonic output module 1 includes an ultrasonic generating unit 11 and an ultrasonic driving unit 12. The ultrasonic generating unit 11 is used to output a high-frequency signal. The ultrasonic driving unit 12 is used to drive the ultrasonic transducer multi-sound source array 3 to convert the above-mentioned high-frequency signal into an alternating voltage signal with constant frequency and increased amplitude. The alternating voltage signal can be a sine wave or square wave periodic signal.

[0039] The liquid supply module 2 includes a liquid pump controller 21 , a liquid supply pump 22 and a liquid supply microneedle 23 , and stably outputs liquid droplets at the end of the liquid supply microneedle 23 .

[0040] The ultrasonic transducer multi-source array 3 includes multiple piezoelectric transducers, which are composed of a piezoelectric ceramic stack, front and rear end covers, and a horn. The entire transducer length should meet 1 / 4 wavelength or an integer multiple of 1 / 4 wavelength, thereby reducing the impedance of the connecting surface under resonance. The horn is made of a material with excellent acoustic properties, such as aluminum, aluminum alloy or titanium alloy.

[0041] Figure 2 This is a cross-sectional view of a multi-sound source rectangular atomization chamber. As shown in the figure, in this embodiment, the multi-sound source matching resonant atomization chamber 4 selects a multi-sound source rectangular atomization chamber 42 based on experimental requirements, atomization nozzle size requirements, flow requirements or atomization scale requirements. Example

[0042] The difference from Example 1 is that the horn is made of one of aluminum, aluminum alloy or titanium alloy with excellent acoustic properties.

[0043] Figure 3 This is a cross-sectional view of a multi-sound source cylindrical atomization chamber. As shown in the figure, in this embodiment, the multi-sound source matching resonant atomization chamber 4 selects a multi-sound source cylindrical atomization chamber 43 based on experimental requirements, atomization nozzle size requirements, flow requirements or atomization scale requirements. Example

[0044] The ultrasonic transducer multi-source array 3 includes multiple transducers, such as transducer A31, transducer B32, etc.;

[0045] Figure 4 This is a cross-sectional view of a multi-source spherical atomization chamber. As shown in the figure, in this embodiment, the multi-source matching resonant atomization chamber 4 selects a multi-source spherical atomization chamber 44 based on experimental requirements, atomization nozzle size requirements, flow requirements or atomization scale requirements.

[0046] Figure 1 The flowchart of the multi-source atomization method of the present invention is shown in the figure. The multi-source atomization method of the present invention specifically includes the following steps:

[0047] Step 1: Build an atomization experimental platform, connect and fix the ultrasonic transducer multi-source array 3 and the matching multi-source matching resonant atomization cavity 4 on the experimental platform, and connect the ultrasonic drive unit 12 and the liquid supply module 2;

[0048] Step 2: Turn on the ultrasonic driving unit 12, input and set the input voltage and frequency of the multiple transducers of the ultrasonic transducer multi-source array 3, that is, the input voltage and frequency of transducer A31 and transducer B32; first output a high-frequency signal through the ultrasonic generating unit 11 of the ultrasonic output module 1, and then drive the multiple transducers of the ultrasonic transducer multi-source array 3 to generate an alternating signal with a constant frequency and increased amplitude through the ultrasonic driving unit 12 of the ultrasonic output module 1, thereby obtaining a high-frequency and high-amplitude sound wave;

[0049] Step 3: Adjust the parameters of each transducer and the multi-source matching resonant atomization cavity 4 to achieve a stable enhanced sound field in the cavity; through the multi-source matching resonant atomization cavity 4, the high-frequency and high-amplitude sound waves are coupled and superimposed to form an enhanced stable sound field, further enhancing the multi-source sound field;

[0050] The parameters that need to be adjusted are:

[0051] For the multi-source rectangular atomization chamber 42, the parameters that need to be adjusted are: the distance H between the piezoelectric transducer or magnetostrictive transducer and the lower wall of the atomization chamber, the height D of the multi-source rectangular atomization chamber 42, the inner cavity length Ls of the multi-source rectangular atomization chamber, and the height h of the multi-source matching resonant atomization chamber;

[0052] For the multi-source cylindrical atomization chamber 43, the parameters that need to be adjusted are: the distance H between the piezoelectric transducer or magnetostrictive transducer and the lower wall of the atomization chamber, the diameter R of the multi-source cylindrical atomization chamber 43, the inner length Ls of the multi-source cylindrical atomization chamber, and the height h of the multi-source matching resonant atomization chamber;

[0053] For the multi-sound source spherical atomization cavity 44 , the parameters that need to be adjusted are: the radius r of the multi-sound source spherical atomization cavity and the height h of the multi-sound source matching resonance atomization cavity.

[0054] Step 4: Turn on the liquid pump controller 21 and the liquid supply pump 22 to enable the end of the liquid supply microneedle 23 to stably output droplets, thereby breaking up and atomizing the droplets stably outputted from the end of the liquid supply microneedle 23 in the cavity to achieve fine atomization.

Claims

1. A multi-sound source atomization device, characterized by: It includes an ultrasonic output module, a liquid supply module, an ultrasonic transducer multi-sound source array and a multi-sound source matching resonant atomization cavity; The ultrasonic output module is used to output a high-frequency signal and convert it into an alternating signal with a constant frequency and increased amplitude; The liquid supply module is used to stably output liquid droplets; The ultrasonic transducer multi-source array is used to convert the alternating signal into a high-frequency, large-amplitude ultrasonic signal; The multi-sound source matching resonant atomization cavity is used to couple and superimpose ultrasonic signals, output an enhanced sound field, and realize ultrafine atomization of a large flow rate of liquid.

2. The multi-sound source atomization device according to claim 1, characterized in that: The ultrasonic output module includes an ultrasonic generating unit and an ultrasonic driving unit. The ultrasonic generating unit is used to output a high-frequency signal. The ultrasonic driving unit is used to drive the ultrasonic transducer multi-source array to convert the above-mentioned high-frequency signal into an alternating voltage signal with a constant frequency and increased amplitude.

3. The multi-sound source atomization device according to claim 2, characterized in that: The alternating voltage signal may be a sinusoidal or square wave periodic signal.

4. The multi-sound source atomization device according to claim 1, characterized in that: The liquid supply module includes a liquid pump controller, a liquid supply pump and a liquid supply microneedle, and stably outputs liquid droplets at the end of the liquid supply microneedle.

5. The multi-sound source atomization device according to claim 1, characterized in that: The ultrasonic transducer multi-source array includes a plurality of transducers.

6. The multi-sound source atomization device according to claim 5, characterized in that: The transducer may be one or more of a piezoelectric transducer and a magnetostrictive transducer.

7. The multi-sound source atomization device according to claim 6, characterized in that: The piezoelectric transducer is composed of a piezoelectric ceramic stack, front and rear end covers, and a horn. The entire transducer length should be 1 / 4 wavelength or an integer multiple of 1 / 4 wavelength, thereby reducing the impedance of the connection surface under resonance. The horn is made of a material with excellent acoustic properties, which can be aluminum, aluminum alloy or titanium alloy.

8. The multi-sound source atomization device according to claim 1, characterized in that: The multi-sound source matching resonant atomization cavity can be a multi-sound source rectangular atomization cavity, a multi-sound source cylindrical atomization cavity or a multi-sound source spherical atomization cavity according to experimental requirements, atomizing nozzle size requirements, flow requirements or atomization scale requirements.

9. A multi-source atomization method, characterized in that: The specific steps include: Step 1: Build an atomization experimental platform, connect and fix the ultrasonic transducer multi-source array and the matching multi-source matching resonant atomization cavity on the experimental platform, and connect the ultrasonic drive unit and the liquid supply module; Step 2: Turn on the ultrasonic driving unit and input the input voltage and frequency of the multiple transducers of the ultrasonic transducer multi-source array; first output a high-frequency signal through the ultrasonic generating unit of the ultrasonic output module, and then drive the multiple transducers of the ultrasonic transducer multi-source array through the ultrasonic driving unit of the ultrasonic output module to generate an alternating signal with a constant frequency and increased amplitude, thereby obtaining a high-frequency and high-amplitude sound wave; Step 3: Adjust the parameters of each transducer and the multi-source matching resonant atomization cavity to achieve a stable enhanced sound field in the cavity; through the multi-source matching resonant atomization cavity, the high-frequency and high-amplitude sound waves are coupled and superimposed to form an enhanced stable sound field, further enhancing the multi-source sound field; Step 4: Turn on the liquid pump controller and the liquid supply pump to ensure that the end of the liquid supply microneedle stably outputs droplets, thereby breaking up and atomizing the droplets stably outputted from the end of the liquid supply microneedle in the cavity to achieve fine atomization.

10. The multi-sound source atomization method according to claim 9, characterized in that: The parameters that need to be adjusted in step 3 are: For a multi-source rectangular atomization chamber, the parameters that need to be adjusted are: the distance H between the piezoelectric transducer or magnetostrictive transducer and the lower wall of the atomization chamber, the height D of the multi-source rectangular atomization chamber, the inner cavity length Ls of the multi-source rectangular atomization chamber, and the height h of the multi-source matching resonant atomization chamber. For a multi-source cylindrical atomizer chamber, the parameters that need to be adjusted are: the distance H between the piezoelectric transducer or magnetostrictive transducer and the lower wall of the atomizer chamber, the diameter R of the multi-source cylindrical atomizer chamber, the inner length Ls of the multi-source cylindrical atomizer chamber, and the height h of the multi-source matching resonant atomizer chamber. For the multi-sound source spherical atomization cavity, the parameters that need to be adjusted are: the radius r of the multi-sound source spherical atomization cavity and the height h of the multi-sound source matching resonant atomization cavity.

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