Atomization assembly and atomization device
By combining piezoelectric ceramic sheets and focusing amplitude transformers, and utilizing high-frequency longitudinal vibration and surface shear transverse wave technology, the problem of uneven particle size in atomization is solved, achieving efficient atomization of fine particles, which is suitable for multiple precision fields.
Patent Information
- Application Number
- CN202511664117.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-13
- Publication Date
- 2025-12-26
AI Technical Summary
Existing technologies struggle to achieve atomization effects with small and highly uniform particle diameters, especially in applications such as medical inhalation nebulization and precision machinery, optoelectronics, semiconductors, and biomedicine, where atomized particles are uneven in size and inefficient.
High-frequency longitudinal vibration is generated by piezoelectric ceramic sheet, and resonance and amplitude amplification are achieved by focusing type amplitude transformer. Combined with liquid guide component, liquid is guided to liquid receiving surface to form liquid film. Surface shear transverse wave is used to break up liquid molecules and atomize them to produce fine atomized particles.
It achieves atomization effect with small particle diameter and high uniformity. It has a simple structure, high economy, and is suitable for atomization scenarios with limited space, such as atomizing masks and atomizing coatings.
Smart Images
Figure CN121198533A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electronic atomization technology, specifically to an atomization component and atomization device. Background Technology
[0002] Atomizing devices are used to disperse liquids into fine droplets and spray these fine droplets out through nozzles or atomizing surfaces.
[0003] In medical inhalation nebulization applications, as well as in precision coating applications in various fields such as precision machinery, optoelectronics, semiconductors, and biomedicine, the requirements for atomized particles are high.
[0004] Achieving atomization with small particle diameter and high uniformity is an urgent problem to be solved. Summary of the Invention
[0005] This application provides an atomizing component and atomizing device to achieve an atomization effect with small particle diameter and high uniformity.
[0006] This application provides an atomizing component, including a piezoelectric ceramic sheet, a focusing amplitude transformer, and a liquid guiding component; The focusing type amplitude rod is disposed on the piezoelectric ceramic sheet. The focusing type amplitude rod includes an amplitude-changing part and a liquid-receiving part connected to the top of the amplitude-changing part. From the piezoelectric ceramic sheet to the liquid-receiving part, the cross-sectional area of the amplitude-changing part gradually decreases. The liquid-receiving part has a liquid-receiving surface on the side opposite to the amplitude-changing part, and the liquid guiding element is used to guide the liquid to be atomized to the liquid-receiving surface, and the liquid to be atomized forms a liquid film on the liquid-receiving surface.
[0007] In some embodiments, the amplitude-changing section is a solid structure; The ratio of the area of the cross-section at the bottom of the amplitude-changing section to the area of the cross-section at the top of the amplitude-changing section is greater than or equal to 4.
[0008] In some embodiments, the ratio of the area of the liquid-receiving surface to the area of the cross-section at the top of the variable amplitude section is greater than or equal to 4.
[0009] In some embodiments, the liquid-receiving portion includes a bottom plate portion and a side plate portion, the bottom plate portion being connected to the top end of the amplitude-changing portion, the side plate portion being connected to the outer periphery of the bottom plate portion, and the upper surface of the bottom plate portion facing away from the amplitude-changing portion being the liquid-receiving surface; The side plate portion is higher than the upper surface of the variable amplitude portion, and the bottom plate portion is higher than the upper surface of the variable amplitude portion. The bottom plate portion and the side plate portion are arranged to form a liquid receiving groove, and the depth of the liquid receiving groove is less than or equal to twice the thickness of the bottom plate portion.
[0010] In some embodiments, the atomizing assembly further includes a sensing sensor disposed in the liquid receiving tank, with the sensing end of the sensing sensor extending to the liquid receiving surface, the sensing sensor being used to detect whether there is a liquid film on the liquid receiving surface; And / or, the atomizing assembly further includes a temperature sensor for detecting the temperature of the piezoelectric ceramic sheet.
[0011] In some embodiments, the focusing type amplitude rod further includes a connecting portion connected to the bottom end of the amplitude section, the amplitude section being located between the liquid-receiving portion and the connecting portion, and the connecting portion being connected to the piezoelectric ceramic sheet.
[0012] In some embodiments, the atomizing component further includes a drive controller electrically connected to the piezoelectric ceramic sheet, the drive controller being configured to output an AC voltage signal with a frequency greater than or equal to 1 MHz to the piezoelectric ceramic sheet.
[0013] This application also provides an atomizing device, including the atomizing components described above.
[0014] In some embodiments, the atomizing device further includes a liquid storage element having a liquid storage cavity for storing the liquid to be atomized; The liquid guiding component in the atomizing assembly is a siphon dropper. One end of the liquid guiding component extends to the bottom of the liquid storage cavity, and the other end extends to the liquid receiving surface of the liquid receiving part in the atomizing assembly. The liquid guiding component is used to guide the liquid to be atomized in the liquid storage cavity to the liquid receiving surface.
[0015] In some embodiments, the atomizing device further includes a liquid level sensor disposed within the liquid storage container, the liquid level sensor being used to detect the liquid level of the liquid to be atomized within the liquid storage cavity; The atomizing device also includes a main controller, which is electrically connected to the liquid level sensor, the sensing sensor, the temperature sensor, and the drive controller in the atomizing component.
[0016] In this embodiment, the high-frequency longitudinal vibration generated by the piezoelectric ceramic sheet is transmitted to a focusing amplitude transformer. Resonance and amplitude amplification are achieved at the amplitude transformer section. The amplified high-frequency, high-amplitude longitudinal vibration is then transmitted to the liquid-receiving section, causing it to vibrate and generate surface shear waves. This causes the liquid molecules on the liquid film on the liquid-receiving surface to break down and atomize, producing fine atomized particles. This achieves an atomization effect with small particle diameter and high uniformity. Furthermore, this atomization component has a simple structure, is economical, and occupies little space, making it suitable for space-constrained atomization scenarios, such as atomizing masks and atomizing coatings. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of an atomizing component provided in an embodiment of this application; Figure 2 This application provides a schematic diagram of the structure of a focusing amplitude transformer in an atomizing assembly. Figure 3 This is a schematic diagram of another atomizing component provided in an embodiment of this application; Figure 4 This is a schematic diagram of the electrical connections of the atomizing device provided in an embodiment of this application.
[0018] The accompanying diagrams are labeled as follows: 1-Piezoelectric ceramic sheet, 2-Focusing amplitude rod, 21-Connecting part, 22-Amplitude part, 23-Liquid receiving part, 231-Liquid receiving surface, 232-Base plate part, 233-Side plate part, 3-Liquid guiding component, 4-Drive controller, 5-Sensing sensor, 6-Temperature sensor, 7-Liquid level sensor, 8-Main controller. Detailed Implementation
[0019] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.
[0020] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.
[0021] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).
[0022] Atomizing devices are used to disperse liquids into fine droplets and atomize them through nozzles or atomizing surfaces. In medical inhalation nebulization applications, as well as in precision coating applications in various fields such as precision machinery, optoelectronics, semiconductors, and biomedicine, the requirements for atomized particles are high. Achieving atomization with small particle diameter and high uniformity is a problem that urgently needs to be solved. To address this problem, this application proposes an atomizing component and atomizing device. The atomizing component and atomizing device mentioned above are described in detail below.
[0023] refer to Figures 1 to 3 This application provides an atomizing component, which includes a piezoelectric ceramic sheet 1, a focusing amplitude transformer 2, and a liquid guiding component 3. The focusing amplitude transformer 2 is disposed on the piezoelectric ceramic sheet 1 and includes an amplitude transformer 22 and a liquid receiving portion 23 connected to the top of the amplitude transformer 22. The cross-sectional area of the amplitude transformer 22 gradually decreases from the piezoelectric ceramic sheet 1 to the liquid receiving portion 23. The liquid receiving portion 23 has a liquid receiving surface 231 on the side away from the amplitude transformer 22. The liquid guiding component 3 is used to guide the liquid to be atomized to the liquid receiving surface 231, and the liquid to be atomized forms a liquid film on the liquid receiving surface 231.
[0024] Among them, the atomizing component is a component in the atomizing device. The atomizing device can be applied to medical inhalation atomization applications, as well as to precision coating applications in various fields such as precision machinery, optoelectronics, semiconductors, and biomedicine.
[0025] The direction from the piezoelectric ceramic sheet 1 to the liquid-receiving part 23 can be referenced. Figure 1 The direction indicated by arrow B. The piezoelectric ceramic sheet 1 is a component capable of converting electrical energy into mechanical energy using the piezoelectric effect. In this embodiment, the piezoelectric ceramic sheet 1 is used to generate high-frequency longitudinal vibrations at the MHz level, that is, the piezoelectric ceramic sheet 1 converts electrical energy into mechanical energy of longitudinal vibration. Here, longitudinal refers to the height direction of the atomizing component, which can be referenced... Figure 1 The direction indicated by arrow A in the middle.
[0026] The amplitude-changing section 22 of the focusing amplitude-changing rod 2, after structural parameter tuning, forms a resonant coupling with the piezoelectric ceramic sheet 1, achieving resonance at the same driving frequency. The amplitude-changing section 22 in the focusing amplitude-changing rod 2 can amplify the amplitude of the vibration generated by the piezoelectric ceramic sheet 1. The amplitude-changing section 22 can be an exponential or conical amplitude-changing rod. The liquid-receiving section 23 is a flat plate structure.
[0027] The liquid guiding component 3 guides the liquid to be atomized to the liquid receiving surface 231 in a metering manner, so that the liquid to be atomized forms a liquid film on the liquid receiving surface 231. As an example, refer to Figure 1The liquid guiding component 3 is located on the upper side of the liquid receiving part 23. The liquid guiding component 3 can be a siphon dropper, a normal pipe for conveying liquid, polyester fiber paper, etc. As another example, refer to Figure 3 The liquid guiding component 3 is an L-shaped feed tube, which passes through the focusing amplitude transformer 2. The L-shaped feed tube includes a feed tube section and a central tube section. The feed tube section is horizontally arranged, and the central tube section extends along the height direction of the atomizing component. The siphon dropper or the L-shaped feed tube can be selected as the liquid guiding component 3 according to the surface tension characteristics of the liquid to be atomized.
[0028] The atomizing device may also include a liquid storage component, which has a liquid storage cavity for storing the liquid to be atomized. The liquid guiding component 3 is specifically used to guide the liquid to be atomized in the liquid storage cavity to the liquid receiving surface 231. The liquid to be atomized may be water, medicine, coating liquid, etc.
[0029] The liquid guiding component 3 guides the liquid to be atomized to the liquid receiving surface 231, so that the liquid to be atomized forms a liquid film on the liquid receiving surface 231. The formed liquid film can be referred to as Figure 1 The film layer is indicated by arrow F. When the liquid film thickness is small, the liquid film is discontinuous, and the atomization efficiency will decrease. When the liquid film is too thick, the vibration energy attenuation is severe, resulting in poor atomization. The thickness of the liquid film can be less than or equal to 200 μm; for example, the thickness of the liquid film can be between 10 μm and 200 μm. In this embodiment, when the thickness of the liquid film is within the above range, both atomization effect and atomization efficiency can be guaranteed.
[0030] The high-frequency longitudinal vibration generated by the piezoelectric ceramic sheet 1 is transmitted to the focusing amplitude transformer 2. The amplitude transformer 22 in the focusing amplitude transformer 2 achieves resonance and amplitude amplification. The amplified high-frequency and high-amplitude longitudinal vibration is transmitted to the liquid receiving part 23, which excites the liquid receiving part 23 to generate surface shear transverse waves. This causes the liquid molecules on the liquid film on the liquid receiving surface 231 to break up and atomize, producing fine atomized particles. No heating or addition of any chemical reagents is required, and it can be applied to industrial production or medical fields.
[0031] The atomizing component produces atomized particles with a diameter of 30 micrometers or less, even down to the 2-micrometer level. This means the particle diameter can range from 2μm to 30μm. For example, the particle diameter can be 2.5μm or less, making it suitable for medical inhalation nebulization applications and precision coating applications in fields such as precision machinery, optoelectronics, semiconductors, and biomedicine. Specific particle diameters include 2μm, 5μm, 6μm, 10μm, 15μm, 20μm, and 30μm.
[0032] When atomizing a liquid into water droplets, higher frequencies result in smaller atomized particles. To achieve a naturally suspended effect, the diameter of the atomized particles must be less than or equal to 2.5 μm to be carried by a micro-airflow; otherwise, the settled particles cannot be carried out. Related technologies typically employ high-frequency piezoelectric vibration of the liquid surface to form a water column atomization or low-frequency piezoelectric drive of a porous structure for atomization. However, these methods require a large atomization structure, result in uneven particle size, a low proportion of suspendable fine particles, and low liquid-to-liquid conversion efficiency.
[0033] In this embodiment, the high-frequency longitudinal vibration generated by the piezoelectric ceramic sheet 1 is transmitted to the focusing amplitude transformer 2. Resonance and amplitude amplification are achieved at the amplitude transformer section 22 in the focusing amplitude transformer 2. The amplified high-frequency, high-amplitude longitudinal vibration is then transmitted to the liquid-receiving section 23, causing it to vibrate and generate surface shear waves. This causes the liquid molecules on the liquid film on the liquid-receiving surface 231 to break up and atomize, producing fine atomized particles. This achieves an atomization effect with small particle diameter and high uniformity. Furthermore, this atomization component has a simple structure, high economic efficiency, and occupies little space, making it suitable for space-constrained atomization scenarios, such as atomizing masks and atomizing coatings.
[0034] In some embodiments, the amplitude-changing part 22 is a solid structure, and there are no visible grooves or holes inside the amplitude-changing part 22, nor are there visible grooves or holes on the side surface of the amplitude-changing part 22.
[0035] In some embodiments, the ratio of the area of the cross-section at the bottom of the amplitude-changing part 22 to the area of the cross-section at the top of the amplitude-changing part 22 is greater than or equal to 4.
[0036] The amplitude-changing section 22 has a bottom end, which is the end of the amplitude-changing section 22 closest to the piezoelectric ceramic sheet 1, and a top end, which is the end of the amplitude-changing section 22 closest to the liquid-receiving section 23. The ratio of the cross-sectional area of the bottom end of the amplitude-changing section 22 to the cross-sectional area of the top end of the amplitude-changing section 22 can be less than or equal to 7. The ratio of the cross-sectional area of the bottom end of the amplitude-changing section 22 to the cross-sectional area of the top end of the amplitude-changing section 22 can be 4, 4.5, 5, 5.5, 6, 6.5, 7, etc.
[0037] In some embodiments, the ratio of the area of the liquid-bearing surface 231 to the area of the cross-section of the top end of the amplitude-changing portion 22 is greater than or equal to 4.
[0038] The ratio of the area of the liquid-receiving surface 231 to the area of the cross-sectional area of the top end of the amplitude-changing section 22 can be less than or equal to 7. The area of the liquid-receiving surface 231 can be less than or equal to the area of the cross-sectional area of the bottom end of the amplitude-changing section 22. The ratio of the area of the liquid-receiving surface 231 to the area of the cross-sectional area of the top end of the amplitude-changing section 22 can be 4, 4.5, 5, 5.5, 6, 6.5, 7, etc.
[0039] In some embodiments, refer to Figure 2 The liquid-receiving part 23 includes a bottom plate part 232 and a side plate part 233. The bottom plate part 232 is connected to the top of the amplitude-changing part 22, and the side plate part 233 is connected to the outer edge of the bottom plate part 232. The upper surface of the bottom plate part 232 facing away from the amplitude-changing part 22 is the liquid-receiving surface 231. The upper surface of the side plate part 233 facing away from the amplitude-changing part 22 is higher than the upper surface of the bottom plate part 232 facing away from the amplitude-changing part 22. The bottom plate part 232 and the side plate part 233 form a liquid-receiving groove, and the depth of the liquid-receiving groove is less than or equal to twice the thickness of the bottom plate part 232.
[0040] The opening of the liquid-receiving tank faces upwards. The depth of the liquid-receiving tank can be greater than or equal to the thickness of the base plate 232. The depth of the liquid-receiving tank can be 1, 1.25, 1.5, 1.75, or 2 times the thickness of the base plate 232, etc. In this embodiment, the side plate 233 defines the boundary of the liquid film on the liquid-receiving surface 231 and prevents the liquid to be atomized from flowing out of the liquid-receiving section 23.
[0041] In some embodiments, refer to Figure 4 The atomizing component also includes a sensing sensor 5, which is located in the liquid receiving tank and extends to the liquid receiving surface 231. The sensing sensor 5 is used to detect whether there is a liquid film on the liquid receiving surface 231.
[0042] The sensing sensor 5 can be a capacitive liquid film sensing probe, a conductive liquid film detection sensor, etc. The sensing sensor 5 is preferably a capacitive liquid film sensing probe. The sensing sensor 5 is used for electrical connection with the main controller 8, which can be an MCU (Microcontroller Unit), an FPGA (Field Programmable Gate Array), a SOC (System on Chip), etc.
[0043] The sensing sensor 5 detects whether there is a liquid film on the liquid-receiving surface 231, and sends a signal to the main controller 8 when a liquid film is detected on the liquid-receiving surface 231. This signal can be a high-level signal. In this embodiment, the sensing sensor 5 can detect whether there is a liquid film on the liquid-receiving surface 231, so that when the atomizing component is working and there is no liquid film on the liquid-receiving surface 231, an abnormal warning is issued, and the piezoelectric ceramic sheet 1 stops outputting vibration, thereby preventing the piezoelectric ceramic sheet 1 from working in a liquid-free state.
[0044] In some embodiments, refer to Figure 4 The atomizing component also includes a temperature sensor 6, which is used to detect the temperature of the piezoelectric ceramic sheet 1.
[0045] The temperature sensor 6 may include a thermistor with a negative temperature coefficient, a thermistor with a positive temperature coefficient, a thermocouple, etc. The temperature sensor 6 is electrically connected to the main controller 8. The temperature sensor 6 detects the temperature of the piezoelectric ceramic sheet 1 and outputs the real-time temperature to the main controller 8. If the temperature of the piezoelectric ceramic sheet 1 is too high, it indicates an abnormality. In this case, an abnormality warning should be issued, and the piezoelectric ceramic sheet 1 should stop vibrating. In this embodiment, the temperature sensor 6 can detect the temperature of the piezoelectric ceramic sheet 1 so that when the atomizing component is working and the temperature of the piezoelectric ceramic sheet 1 is abnormal, an abnormality warning should be issued, and the piezoelectric ceramic sheet 1 should stop vibrating, thereby avoiding damage caused by continuous high-temperature operation of the piezoelectric ceramic sheet 1.
[0046] In some embodiments, refer to Figure 1 and Figure 2 The focusing type amplitude rod 2 also includes a connecting part 21 connected to the bottom end of the amplitude section 22. The amplitude section 22 is located between the liquid receiving part 23 and the connecting part 21, and the connecting part 21 is connected to the piezoelectric ceramic sheet 1.
[0047] The connection between the connecting part 21 and the piezoelectric ceramic sheet 1 can be detachable to facilitate the replacement of the piezoelectric ceramic sheet 1 or the focusing amplitude transformer 2, or it can be fixed. The cross-sectional area of the connecting part 21 remains constant along the height direction of the atomizing assembly. The area of the lower surface of the connecting part 21 that is used to adhere to the piezoelectric ceramic sheet 1 is greater than or equal to the area of the upper surface of the piezoelectric ceramic sheet 1 that is used to adhere to the connecting part 21.
[0048] In some embodiments, refer to Figure 1 and Figure 4 The atomizing component also includes a drive controller 4, which is electrically connected to the piezoelectric ceramic sheet 1. The drive controller 4 is used to output an AC voltage signal with a frequency greater than or equal to 1MHz to the piezoelectric ceramic sheet 1.
[0049] Among them, the drive controller 4 refers to the device used to generate and output electrical signals of a specific frequency and amplitude to drive the actuator to work. The drive controller 4 can be a drive module based on a frequency converter oscillator, a DDS (Direct Digital Synthesis) driver, a high-frequency signal driver based on PWM (Pulse Width Modulation), etc.
[0050] The drive controller 4 is electrically connected to the main controller 8, which controls the operation of the drive controller 4 to output an AC voltage signal to the piezoelectric ceramic element 1. The drive controller 4 can be a high-frequency drive controller. Specifically, the drive controller 4 outputs an AC voltage signal with a frequency of 1MHz-5MHz to the piezoelectric ceramic element 1. The AC voltage signal refers to a voltage signal whose voltage changes periodically with time, alternating between positive and negative directions, and can be a sine wave, square wave, or triangular wave, etc.
[0051] This application embodiment also provides an atomizing device, including an atomizing component, which includes a piezoelectric ceramic sheet 1, a focusing amplitude transformer 2, and a liquid guiding component 3. The focusing amplitude transformer 2 is disposed on the piezoelectric ceramic sheet 1 and includes an amplitude transformer 22 and a liquid receiving portion 23 connected to the top end of the amplitude transformer 22. The cross-sectional area of the amplitude transformer 22 gradually decreases from the direction of the piezoelectric ceramic sheet 1 toward the liquid receiving portion 23. The liquid receiving portion 23 has a liquid receiving surface 231 on the side away from the amplitude transformer 22. The liquid guiding component 3 is used to guide the liquid to be atomized to the liquid receiving surface 231, and the liquid to be atomized forms a liquid film on the liquid receiving surface 231.
[0052] The atomizing device can be used in medical inhalation atomization applications, as well as in precision coating applications in various fields such as precision machinery, optoelectronics, semiconductors, and biomedicine.
[0053] The piezoelectric ceramic sheet 1 is a component that can convert electrical energy into mechanical energy using the piezoelectric effect. In this embodiment, the piezoelectric ceramic sheet 1 is used to generate high-frequency vibrations at the MHz level, that is, the piezoelectric ceramic sheet 1 converts electrical energy into longitudinal vibration mechanical energy. The amplitude-changing part 22 in the focusing amplitude-changing rod 2 is tuned with structural parameters to form a resonant coupling with the piezoelectric ceramic sheet 1, achieving resonance at the same driving frequency. The amplitude-changing part 22 in the focusing amplitude-changing rod 2 can amplify the amplitude of the vibration generated by the piezoelectric ceramic sheet 1. The amplitude-changing part 22 can be an exponential or conical amplitude-changing rod. The liquid-receiving part 23 is a flat plate structure.
[0054] The liquid guiding component 3 can be a siphon dropper, a normal pipe for conveying liquids, polyester fiber paper, etc. The atomizing device may also include a liquid storage component, which has a liquid storage cavity for storing the liquid to be atomized. The liquid guiding component 3 is specifically used to guide the liquid to be atomized in the liquid storage cavity to the liquid receiving surface 231. The liquid to be atomized can be water, medicine, coating liquid, etc.
[0055] The liquid guiding component 3 guides the liquid to be atomized to the liquid receiving surface 231, so that the liquid to be atomized forms a liquid film on the liquid receiving surface 231. When the thickness of the liquid film is too small, the liquid film is discontinuous, and the atomization efficiency will decrease. When the liquid film is too thick, the vibration energy is severely attenuated, and the atomization effect is poor. The thickness of the liquid film can be less than or equal to 200 μm, for example, the thickness of the liquid film can be 10 μm-200 μm. In this embodiment, when the thickness of the liquid film is within the above range, both the atomization effect and the atomization efficiency can be guaranteed.
[0056] In this atomizing device, the high-frequency longitudinal vibration generated by the piezoelectric ceramic sheet 1 is transmitted to the focusing amplitude transformer 2. The amplitude transformer 22 in the focusing amplitude transformer 2 achieves resonance and amplitude amplification. The amplified high-frequency, high-amplitude longitudinal vibration is transmitted to the liquid receiving part 23, which excites the liquid receiving part 23 to generate surface shear transverse waves, thereby breaking down and atomizing the liquid molecules on the liquid film on the liquid receiving surface 231, producing fine atomized particles. No heating or addition of any chemical reagents is required, and it can be applied to industrial production or medical fields.
[0057] The atomizing device produces atomized particles with a diameter of less than or equal to 30 micrometers, or even less than 2 micrometers. In other words, the atomizing component produces atomized particles with a diameter of 2μm-30μm. For example, the atomizing component produces atomized particles with a diameter of less than or equal to 2.5μm, which is fully applicable to medical inhalation atomization applications and precision coating applications in various fields such as precision machinery, optoelectronics, semiconductors, and biomedicine.
[0058] In this embodiment, the high-frequency longitudinal vibration generated by the piezoelectric ceramic sheet 1 is transmitted to the focusing amplitude transformer 2. Resonance and amplitude amplification are achieved at the amplitude transformer section 22 in the focusing amplitude transformer 2. The amplified high-frequency, high-amplitude longitudinal vibration is then transmitted to the liquid-receiving section 23, causing it to vibrate and generate surface shear waves. This causes the liquid molecules on the liquid film on the liquid-receiving surface 231 to break up and atomize, producing fine atomized particles. This achieves an atomization effect with small particle diameter and high uniformity. Furthermore, this atomization device has a simple structure, high economic efficiency, and occupies little space, making it suitable for space-constrained atomization scenarios, such as atomizing masks and atomizing coatings.
[0059] In some embodiments, the atomizing device further includes a liquid storage component having a liquid storage cavity for storing the liquid to be atomized; the liquid guiding component 3 in the atomizing assembly is a siphon dropper, one end of the liquid guiding component 3 extends to the bottom of the liquid storage cavity, and the other end of the liquid guiding component 3 extends to the liquid receiving surface 231 of the liquid receiving part 23 in the atomizing assembly, and the liquid guiding component 3 is used to guide the liquid to be atomized in the liquid storage cavity to the liquid receiving surface 231.
[0060] The device includes a liquid inlet on the liquid storage unit and a cover that is detachably connected to the liquid storage unit and positioned over the liquid inlet. A filter may be installed inside the liquid inlet to filter the liquid to be atomized entering through it. The liquid storage unit can be made of a transparent material to facilitate observation of the liquid level, or it can be made of a non-transparent material.
[0061] The siphon dropper can be in the shape of an inverted L, an inverted U, etc. It can be a flexible tube, a rigid siphon, a composite capillary, etc. Based on the principle of siphoning, the siphon dropper guides the liquid to be atomized in the storage chamber to the receiving surface 231. In this embodiment, the liquid guiding component 3 is a siphon dropper, which enables the guidance of the liquid to be atomized in the storage chamber to the receiving surface 231 without power, thus achieving unpowered liquid supply.
[0062] In some embodiments, the amplitude transformer 22 is a solid structure, with no visible grooves or holes inside or on its side surfaces. The ratio of the cross-sectional area of the bottom end of the amplitude transformer 22 to the cross-sectional area of the top end of the amplitude transformer 22 is greater than or equal to 4.
[0063] In some embodiments, the ratio of the area of the liquid-bearing surface 231 to the area of the cross-section of the top end of the amplitude-changing portion 22 is greater than or equal to 4.
[0064] In some embodiments, the liquid-receiving portion 23 includes a bottom plate portion 232 and a side plate portion 233. The upper surface of the bottom plate portion 232 facing away from the upper surface of the amplitude-changing portion 22 is the liquid-receiving surface 231. The upper surface of the side plate portion 233 facing away from the upper surface of the amplitude-changing portion 22 is higher than the upper surface of the bottom plate portion 232 facing away from the upper surface of the amplitude-changing portion 22. The bottom plate portion 232 and the side plate portion 233 are arranged to form a liquid-receiving groove, and the depth of the liquid-receiving groove is less than or equal to twice the thickness of the bottom plate portion 232.
[0065] In some embodiments, the atomizing assembly further includes a sensing sensor 5, which is disposed in the liquid receiving tank and extends to the liquid receiving surface 231. The sensing sensor 5 is used to detect whether there is a liquid film on the liquid receiving surface 231. The atomizing assembly also includes a drive controller 4, which is electrically connected to the piezoelectric ceramic sheet 1. The drive controller 4 is used to output an AC voltage signal with a frequency greater than or equal to 1MHz to the piezoelectric ceramic sheet 1. The atomizing assembly also includes a temperature sensor 6, which is used to detect the temperature of the piezoelectric ceramic sheet 1.
[0066] In some embodiments, refer to Figure 4The atomizing device also includes a liquid level sensor 7, which is located inside the liquid storage chamber and is used to detect the liquid level of the liquid to be atomized in the liquid storage chamber. The atomizing device also includes a main controller 8, which is electrically connected to the liquid level sensor 7, the sensing sensor 5, the temperature sensor 6 and the drive controller 4.
[0067] The main controller 8 can be an MCU (Microcontroller Unit), FPGA (Field Programmable Gate Array), or SOC (System on Chip). The drive controller 4 is a device used to generate and output electrical signals of specific frequency and amplitude to drive the actuator. The drive controller 4 can be a drive module based on a frequency converter oscillator, a DDS (Direct Digital Synthesis) driver, or a high-frequency signal driver based on PWM (Pulse Width Modulation).
[0068] The atomizing device also includes a first power supply component and a second power supply component. The first power supply component is electrically connected to the main controller 8 and is used to supply power to the main controller 8. The second power supply component is electrically connected to the drive controller 4 and is used to supply power to the main controller 8. The liquid level sensor 7, the sensing sensor 5, and the temperature sensor 6 can be powered by the main controller 8.
[0069] The main controller 8 controls the operation of the drive controller 4, causing the drive controller 4 to output an AC voltage signal to the piezoelectric ceramic plate 1. The drive controller 4 can be a high-frequency drive controller. Specifically, the drive controller 4 outputs an AC voltage signal with a frequency of 1MHz-5MHz to the piezoelectric ceramic plate 1. The AC voltage signal refers to a voltage signal whose voltage changes periodically with time, alternating between positive and negative directions, and can be a sine wave, square wave, or triangular wave, etc.
[0070] The sensing sensor 5 can be a capacitive liquid film sensing probe, a conductive liquid film detection sensor, etc. The sensing sensor 5 detects the presence or absence of a liquid film on the liquid-bearing surface 231 and sends a signal to the main controller 8 when a liquid film is detected on the liquid-bearing surface 231. This signal can be a high-level signal. The main controller 8 is used to confirm whether it receives the signal sent by the sensing sensor 5 during the operation of the drive controller 4. If no signal is received from the sensing sensor 5, i.e., when there is no liquid film on the liquid-bearing surface 231, an abnormal warning is issued, and the drive controller 4 is controlled to stop working. Specifically, the drive controller 4 stops outputting AC voltage signals to the piezoelectric ceramic plate 1, preventing the piezoelectric ceramic plate 1 from vibrating and thus avoiding operation of the piezoelectric ceramic plate 1 in a liquid-free state.
[0071] Temperature sensor 6 may include a thermistor with a negative temperature coefficient, a thermistor with a positive temperature coefficient, a thermocouple, etc. Temperature sensor 6 detects the temperature of piezoelectric ceramic plate 1 and outputs the real-time temperature to the main controller 8. The main controller 8 is used to receive the real-time temperature sent by temperature sensor 6 during the operation of drive controller 4, determine whether the real-time temperature is greater than a set threshold, issue an abnormal warning when the real-time temperature is greater than the set threshold, and control drive controller 4 to stop working, that is, control drive controller 4 to stop outputting AC voltage signal to piezoelectric ceramic plate 1, so that piezoelectric ceramic plate 1 no longer outputs vibration.
[0072] The liquid level sensor 7 can be an electrode-type liquid level sensor, a float-type liquid level sensor, a capacitive liquid level sensor, a photoelectric liquid level sensor, an ultrasonic liquid level sensor, etc. The liquid level sensor 7 detects the liquid level of the liquid to be atomized in the storage chamber and outputs the real-time liquid level to the main controller 8. The main controller 8 is used to receive the real-time liquid level sent by the liquid level sensor 7 during the operation of the drive controller 4, determine whether the real-time liquid level is less than the liquid shortage threshold, and issue an abnormal warning when the real-time liquid level is less than the set liquid shortage threshold, and control the drive controller 4 to stop working, that is, control the drive controller 4 to stop outputting AC voltage signals to the piezoelectric ceramic plate 1, so that the piezoelectric ceramic plate 1 no longer outputs vibration, thereby avoiding the operation of the piezoelectric ceramic plate 1 in a liquid-free state.
[0073] The above examples illustrate this application only to aid understanding and are not intended to limit its scope. Those skilled in the art to which this application pertains can make various simple deductions, modifications, or substitutions based on the ideas presented.
Claims
1. An atomizing component, characterized in that, It includes a piezoelectric ceramic sheet (1), a focusing type amplitude transformer (2), and a liquid guiding component (3); The focusing type amplitude rod (2) is disposed on the piezoelectric ceramic sheet (1). The focusing type amplitude rod (2) includes an amplitude part (22) and a liquid-receiving part (23) connected to the top of the amplitude part (22). From the piezoelectric ceramic sheet (1) to the liquid-receiving part (23), the cross-sectional area of the amplitude part (22) gradually decreases. The liquid-receiving part (23) has a liquid-receiving surface (231) on the side opposite to the amplitude-changing part (22), and the liquid guide (3) is used to guide the liquid to be atomized to the liquid-receiving surface (231), and the liquid to be atomized forms a liquid film on the liquid-receiving surface (231).
2. The atomizing component according to claim 1, characterized in that, The amplitude-changing part (22) is a solid structure; The ratio of the area of the cross-section at the bottom of the amplitude-changing part (22) to the area of the cross-section at the top of the amplitude-changing part (22) is greater than or equal to 4.
3. The atomizing component according to claim 1, characterized in that, The ratio of the area of the liquid-bearing surface (231) to the area of the cross-section at the top of the variable amplitude part (22) is greater than or equal to 4.
4. The atomizing component according to any one of claims 1 to 3, characterized in that, The liquid-receiving part (23) includes a bottom plate part (232) and a side plate part (233). The bottom plate part (232) is connected to the top of the variable amplitude part (22), and the side plate part (233) is connected to the outer edge of the bottom plate part (232). The upper surface of the bottom plate part (232) facing away from the variable amplitude part (22) is the liquid-receiving surface (231). The side plate portion (233) is higher than the upper surface of the variable amplitude portion (22) than the upper surface of the bottom plate portion (232). The bottom plate portion (232) and the side plate portion (233) are arranged to form a liquid receiving groove, and the depth of the liquid receiving groove is less than or equal to twice the thickness of the bottom plate portion (232).
5. The atomizing component according to claim 4, characterized in that, The atomizing component also includes a sensing sensor (5), which is disposed in the liquid receiving tank and the detection end of the sensing sensor (5) extends to the liquid receiving surface (231). The sensing sensor (5) is used to detect whether there is a liquid film on the liquid receiving surface (231). And / or, the atomizing assembly further includes a temperature sensor (6) for detecting the temperature of the piezoelectric ceramic sheet (1).
6. The atomizing component according to any one of claims 1 to 3, characterized in that, The focusing type amplitude rod (2) also includes a connecting part (21) connected to the bottom end of the amplitude part (22). The amplitude part (22) is located between the liquid receiving part (23) and the connecting part (21). The connecting part (21) is connected to the piezoelectric ceramic sheet (1).
7. The atomizing component according to any one of claims 1 to 3, characterized in that, The atomizing component also includes a drive controller (4), which is electrically connected to the piezoelectric ceramic sheet (1). The drive controller (4) is used to output an AC voltage signal with a frequency greater than or equal to 1MHz to the piezoelectric ceramic sheet (1).
8. An atomizing device, characterized in that, Includes the atomizing component as described in any one of claims 1 to 7.
9. The atomizing device according to claim 8, characterized in that, The atomizing device further includes a liquid storage component, which has a liquid storage cavity for storing the liquid to be atomized; The liquid guiding component (3) in the atomizing assembly is a siphon dropper. One end of the liquid guiding component (3) extends to the bottom of the liquid storage cavity, and the other end of the liquid guiding component (3) extends to the liquid receiving surface (231) of the liquid receiving part (23) in the atomizing assembly. The liquid guiding component (3) is used to guide the liquid to be atomized in the liquid storage cavity to the liquid receiving surface (231).
10. The atomizing device according to claim 9, characterized in that, The atomizing device also includes a liquid level sensor (7), which is located inside the liquid storage component and is used to detect the liquid level of the liquid to be atomized in the liquid storage cavity. The atomizing device also includes a main controller (8), which is electrically connected to the liquid level sensor (7), the sensing sensor (5), the temperature sensor (6) and the drive controller (4) in the atomizing component.