Ultrasonic nebulizer device

Abstract

The application discloses an ultrasonic atomization device, which comprises a liquid storage cavity for storing a liquid matrix, an ultrasonic atomization piece in liquid communication with the liquid storage cavity and generating oscillation to atomize the liquid matrix, a power supply and a drive control circuit; the drive control circuit comprises a controller, a drive circuit and an impedance matching circuit; the impedance matching circuit comprises a capacitance branch and an inductance branch; the capacitance branch is connected in series with the ultrasonic atomization piece to form a first circuit, and the inductance branch is connected with the first circuit to form a second circuit; the drive circuit is connected with the controller, the power supply and the second circuit respectively, and is configured to output a drive voltage for driving the ultrasonic atomization piece based on the control of the controller. In the above manner, the working efficiency of the ultrasonic atomization piece can be effectively improved.

Description

Technical Field

[0001] This application relates to the field of atomizer technology, and in particular to an ultrasonic atomizing device. Background Technology

[0002] An ultrasonic atomizing device is a device that uses ultrasonic atomization technology to achieve the atomization function.

[0003] Currently, in the use of ultrasonic atomizing devices, in order to make the ultrasonic atomizing plate in the ultrasonic atomizing device have high working efficiency, the ultrasonic atomizing plate is usually controlled to work near its series resonant point. At this time, the ultrasonic atomizing plate exhibits a capacitive state.

[0004] However, when the power supply supplies power to the ultrasonic atomizing plate which is in a capacitive state, there is a large phase difference between the working voltage and the working current on the ultrasonic atomizing plate, resulting in low working efficiency of the ultrasonic atomizing plate. Summary of the Invention

[0005] The embodiments of this application aim to provide an ultrasonic atomizing device that can effectively improve the working efficiency of ultrasonic atomizing sheets.

[0006] In a first aspect, this application provides an ultrasonic atomizing device, comprising:

[0007] The liquid reservoir is configured to store a liquid matrix.

[0008] An ultrasonic atomizing plate is connected to the liquid in the reservoir, and the ultrasonic atomizing plate is configured to generate oscillations to atomize the liquid matrix;

[0009] Power supply and drive control circuit;

[0010] The drive control circuit includes a controller, a drive circuit, and an impedance matching circuit;

[0011] The impedance matching circuit includes a capacitor branch and an inductor branch; the capacitor branch is connected in series with the ultrasonic atomizing plate to form a first circuit, and the inductor branch is connected to the first circuit to form a second circuit.

[0012] The driving circuit is connected to the controller, the power supply and the second circuit respectively. The driving circuit is configured to output a driving voltage for driving the ultrasonic atomizing plate based on the control of the controller.

[0013] Secondly, this application provides an ultrasonic atomizing device, comprising:

[0014] The liquid reservoir is configured to store a liquid matrix.

[0015] An ultrasonic atomizing plate is connected to the liquid in the reservoir, and the ultrasonic atomizing plate is configured to generate oscillations to atomize the liquid matrix;

[0016] Power supply and drive control circuit;

[0017] The drive control circuit includes a controller, a dual-switch boost drive circuit, and an impedance matching circuit.

[0018] The impedance matching circuit includes a capacitor branch and an inductor branch; the capacitor branch is connected in series with the ultrasonic atomizing plate to form a first circuit, and the inductor branch is connected to the first circuit to form a second circuit.

[0019] The dual-switch boost drive circuit is connected to the controller, the power supply and the second circuit respectively. The dual-switch boost drive circuit is configured to alternately output a first drive voltage and a second drive voltage to drive the ultrasonic atomizing plate based on the control of the controller.

[0020] Thirdly, this application provides an ultrasonic atomizing device, comprising:

[0021] Power supply mechanism and ultrasonic atomizer;

[0022] The ultrasonic atomizer includes:

[0023] A first housing, wherein a liquid storage chamber is formed within the first housing and is configured to store a liquid matrix;

[0024] An ultrasonic atomizing plate is disposed within the first housing, the ultrasonic atomizing plate being in communication with the liquid in the storage chamber, and the ultrasonic atomizing plate being configured to generate oscillations upon receiving a driving voltage to atomize the liquid matrix;

[0025] The power supply mechanism includes:

[0026] Second shell;

[0027] A power supply and drive control circuit is disposed in the second housing. The drive control circuit includes a controller, a drive circuit and an impedance matching circuit. The drive circuit is connected to the power supply and the controller respectively. The impedance matching circuit includes a capacitor branch and an inductor branch.

[0028] When the first housing and the second housing are coupled, the capacitor branch is connected in series with the ultrasonic atomizing plate to form a first circuit, the inductor branch is connected with the first circuit to form a second circuit, and the driving circuit is connected with the second circuit; the driving circuit is configured to output a driving voltage for driving the ultrasonic atomizing plate based on the control of the controller.

[0029] The ultrasonic atomizing device provided in this application includes a liquid storage chamber, an ultrasonic atomizing plate, a power supply, a controller, a drive circuit, and an impedance matching circuit. The impedance matching circuit includes a capacitor branch and an inductor branch. The capacitor branch is connected in series with the ultrasonic atomizing plate to form a first circuit, and the inductor branch is connected to the first circuit to form a second circuit. Through the arrangement of the first and second circuits, even when the equivalent capacitance of the ultrasonic atomizing plate varies over a large range, the overall impedance characteristic of the second circuit remains stably inductive. Furthermore, this reduces the phase difference between the operating current and operating voltage on the ultrasonic atomizing plate, increases the useful power on the ultrasonic atomizing plate, reduces the heating power on the ultrasonic atomizing plate, thereby improving the working efficiency of the ultrasonic atomizing plate and also helping to reduce the heating temperature of the ultrasonic atomizing plate. Attached Figure Description

[0030] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0031] Figure 1 This is a schematic diagram of the ultrasonic atomizing device provided in the embodiments of this application;

[0032] Figure 2 This is a schematic diagram of the structure of an ultrasonic atomizing device provided in another embodiment of this application;

[0033] Figure 3 This is a schematic diagram of the drive control circuit provided in an embodiment of this application;

[0034] Figure 4 A schematic diagram of the circuit structure of the drive control circuit provided in the embodiments of this application;

[0035] Figure 5 This is a schematic diagram showing the working voltage and current applied to the ultrasonic atomizing plate without adding capacitor and inductor branches, as provided in an embodiment of this application.

[0036] Figure 6 This is a schematic diagram showing the working voltage and current applied to the ultrasonic atomizing sheet when adding capacitor and inductor branches, as provided in an embodiment of this application.

[0037] Figure 7 A schematic diagram of the circuit structure of a drive control circuit provided in another embodiment of this application;

[0038] Figure 8 This is a schematic diagram of the drive circuit provided in an embodiment of this application;

[0039] Figure 9This is a schematic diagram of the drive circuit provided in another embodiment of this application. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] This application provides an ultrasonic atomizing device. The ultrasonic atomizing device includes an impedance matching circuit connected to an ultrasonic atomizing plate. The impedance matching circuit includes a capacitor branch connected in series with the ultrasonic atomizing plate, forming a first circuit; and an inductor branch connected to the first circuit, forming a second circuit. Through the design of the impedance matching circuit, even when the equivalent capacitance of the ultrasonic atomizing plate changes significantly, the overall equivalent capacitance of the first circuit can be maintained within a certain range, thus ensuring that the overall impedance characteristics of the second circuit remain stably inductive. When power is supplied to the ultrasonic atomizing plate, which exhibits an inductive state, the operating current and operating voltage on the ultrasonic atomizing plate can remain in phase or have a small phase difference. This increases the useful power on the ultrasonic atomizing plate, reduces the heating power of the ultrasonic atomizing plate (i.e., reduces the heating temperature of the ultrasonic atomizing plate), and keeps the ultrasonic atomizing plate operating near its series resonant frequency as much as possible, thereby improving the working efficiency of the ultrasonic atomizing plate.

[0042] For multiple ultrasonic atomizing plates (e.g., those from the same batch), different plates may have different characteristics or parameters, resulting in varying equivalent capacitances when operating near the resonant frequency. In this case, by adding a capacitor branch, the variation range of the overall equivalent capacitance of the first circuit can be controlled within a small range. Similarly, by adding an inductive branch, the impedance characteristic of the second circuit can be switched to inductive, thereby reducing the heating temperature of the ultrasonic atomizing plate. In other words, by keeping the capacitor and inductive branches constant during the application of multiple ultrasonic atomizing plates, the problem of inconsistent atomization performance caused by individual differences in ultrasonic atomizing plate performance is solved, and the production efficiency of the ultrasonic atomizing device is improved.

[0043] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the ultrasonic atomizing device provided in an embodiment of this application. Figure 1 As shown, the ultrasonic atomizing device 100 includes a liquid storage chamber 11, an ultrasonic atomizing plate 12, a drive control circuit 13, and a power supply 14.

[0044] The liquid storage chamber 11 is used to store a liquid matrix, which may include different substances depending on the application scenario. For example, in the field of electronic cigarette atomization, it may contain nicotine and / or fragrances and / or aerosol generating substances (e.g., glycerin); or in the field of medical atomization, it may contain drugs that treat diseases or are beneficial to health and / or solvents such as saline.

[0045] The ultrasonic atomizing plate 12 is in fluid communication with the liquid storage chamber 11. The ultrasonic atomizing plate 12 can be directly disposed in the liquid storage chamber 11, or the atomizing chamber containing the ultrasonic atomizing plate 12 can be directly connected to the liquid storage chamber 11, or liquid can be transferred between the ultrasonic atomizing plate 12 and the liquid storage chamber 11 through a liquid-absorbing medium. The ultrasonic atomizing plate 12 is used to generate oscillations to atomize the liquid matrix, that is, to atomize the liquid matrix transmitted to or near the ultrasonic atomizing plate 12 into an aerosol through vibration. Specifically, during use, the ultrasonic atomizing plate 12 disperses the liquid matrix through high-frequency vibration (preferably a vibration frequency of 1.7MHz to 4.0MHz, exceeding the range of human hearing and belonging to the ultrasonic frequency band) to generate aerosols with naturally suspended particles.

[0046] The drive control circuit 13 is electrically connected to the ultrasonic atomizing plate 12, and the drive control circuit 13 is used to provide drive voltage and drive current to the ultrasonic atomizing plate 12 according to the power supply 14. In one embodiment, the drive control circuit 13 can be disposed on a printed circuit board (PCB).

[0047] Power source 14 is used for power supply. In one embodiment, power source 14 is a battery. The battery can be a lithium-ion battery, lithium metal battery, lead-acid battery, nickel-cadmium battery, nickel-metal hydride battery, lithium-sulfur battery, lithium-air battery, or sodium-ion battery, etc., and is not limited thereto. In terms of scale, the battery in this embodiment can be a single cell, or a battery module composed of multiple cells connected in series and / or in parallel, etc., and is not limited thereto. Of course, in other embodiments, the battery may include more or fewer components, or have different component configurations, and this embodiment does not limit this.

[0048] In one embodiment, the ultrasonic atomizing device 100 further includes a liquid transfer medium 15 and an air outlet channel 16.

[0049] The liquid transfer element 15 is used to transfer the liquid matrix between the liquid storage chamber 11 and the ultrasonic atomizing plate 12.

[0050] The exhaust channel 16 is used to output inhalable vapor or aerosol generated by the liquid matrix for the user to inhale.

[0051] The ultrasonic atomizing device 100 can be either a single unit or an assembled unit. In one embodiment, when the ultrasonic atomizing device 100 is an assembled unit, the ultrasonic atomizing device 100 further includes a power supply mechanism and an ultrasonic atomizer, wherein the ultrasonic atomizer includes a first housing 17 and the power supply mechanism includes a second housing 18.

[0052] The first housing 17 and the second housing 18 are detachably connected. In one embodiment, the first housing 17 and the second housing 18 can be detachably connected through a snap-fit ​​structure or a magnetic attraction structure. The first housing 17 and the second housing 18 together serve to house and protect other components. The liquid storage chamber 11, the ultrasonic atomizing plate 12, the liquid transfer element 15, and the air outlet channel 16 are all disposed within the first housing 17, while the drive control circuit 13 and the power supply 14 are all disposed within the second housing 18.

[0053] The first housing 17 and the second housing 18 are detachably aligned in a functional relationship. Various mechanisms can be used to connect the second housing 18 to the first housing 17, resulting in threaded engagement, press-fit engagement, interference fit, magnetic engagement, etc. In some embodiments, when the first housing 17 and the second housing 18 are in an assembled configuration, the ultrasonic atomizing device 100 can be substantially rod-shaped, cylindrical, bar-shaped, columnar, etc.

[0054] The first housing 17 and the second housing 18 can be formed of any suitable structurally sound material. In some examples, the first housing 17 and the second housing 18 can be formed of metals or alloys such as stainless steel or aluminum. Other suitable materials include various plastics (e.g., polycarbonate), metal-plated plastic, ceramics, and so on.

[0055] It should be noted that, as Figure 1 The hardware structure of the ultrasonic atomizing device 100 shown is merely an example, and the ultrasonic atomizing device 100 may have more or fewer components than those shown in the figure, may combine two or more components, or may have different component configurations. The various components shown in the figure can be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and / or application-specific integrated circuits. For example, as Figure 2 As shown, the ultrasonic atomizing plate 12 can be placed in the liquid storage chamber 11, which can save the liquid transmission element 15 and help save costs.

[0056] At the same time, it is understandable that Figure 1 or Figure 2The ultrasonic atomizing device 100 shown can be applied to various occasions and plays different roles, and this application embodiment does not impose specific limitations on it. For example, in one embodiment, the ultrasonic atomizing device 100 is applied in the medical field. In this case, the ultrasonic atomizer 100 can be a medical atomizer, which can atomize the liquid medicine added inside and allow the patient to inhale it to achieve the effect of adjuvant therapy. As another example, in another embodiment, the ultrasonic atomizing device 100 can also be used as an electronic product, such as an electronic cigarette. An electronic cigarette is an electronic product that uses atomization and other means to turn nicotine solution, etc., into an aerosol for the user to inhale.

[0057] Please refer to Figure 3 , Figure 3 This application provides a schematic diagram showing the structure of the drive control circuit 13 connected to the power supply 14 and the ultrasonic atomizing plate 12, respectively, according to an embodiment of the present application. Figure 3 As shown, the drive control circuit 13 includes a controller 131, a drive circuit 132, and an impedance matching circuit 133. The impedance matching circuit 133 includes a capacitor branch 1331 and an inductor branch 1332. The capacitor branch 1331 is connected in series with the ultrasonic atomizing plate 12 to form a first circuit A1, and the inductor branch 1332 is connected to the first circuit A1 to form a second circuit A2. The drive circuit 132 is connected to the controller 131, the power supply 14, and the second circuit A2. The drive circuit 132 is configured to output a drive voltage for driving the ultrasonic atomizing plate 12 based on the control of the controller 131.

[0058] The controller 131 can be a microcontroller unit (MCU) or a digital signal processing (DSP) controller. The controller 131 is electrically connected to the drive circuit 132, and can be used to control at least one electronic component in the drive circuit 132. In another embodiment, the drive circuit 132 can also be a dual-switch boost drive circuit.

[0059] In the application of the ultrasonic atomizing plate 12, in order to improve its working efficiency, it is necessary to make the ultrasonic atomizing plate 12 operate as close as possible to its series resonant frequency. At this time, the ultrasonic atomizing plate 12 exhibits a capacitive state. However, the ultrasonic atomizing plate 12 in a capacitive state may have the following problems:

[0060] 1. When power supply 14 provides energy to the ultrasonic atomizing plate 12 in a capacitive state, there will be a large phase difference between the operating voltage and operating current on the ultrasonic atomizing plate 12, resulting in very little useful power obtained by the ultrasonic atomizing plate 12. This leads to very low efficiency of power supply 14, i.e., high input power but very little power available to the load for operation. Furthermore, the remaining input power is converted into heat generation by power supply 14 or ultrasonic atomizing plate 12, causing severe overheating of ultrasonic atomizing plate 12, i.e., excessively high heating temperature.

[0061] Second, the parameters of the ultrasonic atomizing plate 12 are unstable and difficult to control. For example, even within the same batch of ultrasonic atomizing plates 12, the consistency between different plates is poor, resulting in varying equivalent capacitance values ​​during operation. Therefore, for different ultrasonic atomizing devices 100, corresponding control parameters need to be set based on the specific ultrasonic atomizing plate 12, increasing the difficulty of controlling the plate and leading to poor product stability. Furthermore, the equivalent capacitance of the ultrasonic atomizing plate 12 changes during operation, further increasing the difficulty of controlling it.

[0062] Third, it is difficult to effectively control the ultrasonic atomizing plate 12 through input current. Because the ultrasonic atomizing plate 12 is in a capacitive state, the instantaneous current is sometimes abnormally large and sometimes changes rapidly, which is very unstable. The control of the ultrasonic atomizing plate 12 is usually based on the detection of input current, which makes the control of the microprocessor more difficult.

[0063] In the embodiments of this application, by adding capacitor branch 1331 and inductor branch 1332, the unstable characteristic of the equivalent capacitance of the ultrasonic atomizing plate 12 can be overcome, effectively maintaining the impedance characteristic of the second circuit A2 as inductive, making the phase difference between the working voltage and working current on the ultrasonic atomizing plate 12 smaller, or even keeping them in phase. Consequently, the heating power on the ultrasonic atomizing plate 12 can be reduced, i.e., the heating temperature of the ultrasonic atomizing plate 12 can be lowered, while simultaneously increasing the useful power on the ultrasonic atomizing plate 12, thus improving the overall working efficiency of the ultrasonic atomizing plate 12.

[0064] Furthermore, for N ultrasonic atomizing devices 100, each ultrasonic atomizing device 100 contains one ultrasonic atomizing plate 12, resulting in a total of N ultrasonic atomizing plates 12, where N is an integer ≥ 1. The individual performance of different ultrasonic atomizing plates 12 typically varies, even if the N ultrasonic atomizing plates 12 are from the same batch. In this case, by simply setting the same capacitor branch 1331 and inductor branch 1332 in each of the N ultrasonic atomizing devices 100, the variation range of the overall equivalent capacitance of the N first circuits A1 in the N ultrasonic atomizing devices 100 can be controlled within a small range, and the overall impedance characteristic of the N second circuits A2 in the N ultrasonic atomizing devices 100 can be switched to inductive. In this case, the heating temperature of the N ultrasonic atomizing plates 12 is relatively low. Furthermore, at this time, the same control parameters can be used for N ultrasonic atomizing devices 100, thereby reducing the control difficulty, increasing the yield rate in the production process, and improving the overall production efficiency.

[0065] Meanwhile, since the impedance characteristic of the second circuit A2 remains inductive, it can resist changes in current for inductive loads. Therefore, there is no large overshoot current during the startup process of the ultrasonic atomizing device 100. For example, the operating voltage of the ultrasonic atomizing plate 12 at the initial startup stage can be set to the maximum value of the operating voltage throughout the entire working cycle, thus driving the ultrasonic atomizing plate 12 with the maximum voltage. Therefore, during the initial startup stage of the ultrasonic atomizing plate 12, there is no need to adopt a slow start method, i.e., gradually increasing the voltage during the startup process, which reduces the control difficulty and enables rapid smoke production of the first puff of mist.

[0066] Of course, in some embodiments, in conjunction with the actual application of the ultrasonic atomizing device 100, after the ultrasonic atomizing plate 12 is started and enters a steady state, it may not be necessary to maintain a large power to drive the ultrasonic atomizing plate 12 due to heat generation or other reasons. In other words, after entering a steady state, the driving voltage for driving the ultrasonic atomizing plate 12 can be reduced. Specifically, in one embodiment, the operating voltage waveform of the ultrasonic atomizing plate 12 during operation can be an underdamped oscillation or a decreasing oscillation with a gradually decreasing amplitude.

[0067] In one embodiment, the capacitor branch 1331 is configured such that the capacitance value of the capacitor branch 1331 is less than the capacitance value of the equivalent capacitance when the ultrasonic atomizing plate 12 operates at the series resonant frequency point.

[0068] In this embodiment, the capacitance of capacitor branch 1331 is configured to be less than the equivalent capacitance of the ultrasonic atomizing plate 12 when it operates at the series resonant frequency. Since the total capacitance of the series capacitors is necessarily less than the capacitance of any single capacitor in series, regardless of the type of ultrasonic atomizing plate 12 selected, the final equivalent capacitance of the first circuit A1 will always be a value less than the capacitance of capacitor branch 1331. For example, in one embodiment, the equivalent capacitance of the ultrasonic atomizing plate 12 when it operates at the series resonant frequency is 5.9 nF, and the capacitance of capacitor branch 1331 is configured to be 4.7 nF. Therefore, the equivalent capacitance of the first circuit A1 will be, for example, less than 4.7 nF.

[0069] Subsequently, by selecting a suitable capacitor branch 1331, the capacitance value of the equivalent capacitor of the first circuit A1 can be configured to the required value. That is, the capacitance value of the equivalent capacitor of the first circuit A1 is a controllable value, which can be configured by the user according to different application scenarios, making it highly practical.

[0070] In this case, it can be determined that the equivalent capacitance of the first circuit A1 is necessarily less than the capacitance of the capacitor branch 1331. In one embodiment, the capacitance of the capacitor branch 1331 can be used as the maximum value of the equivalent capacitance of the first circuit A1, and the minimum value of the inductance of the inductor branch 1332 can be calculated based on the condition of switching the impedance characteristic of the second circuit A2 to inductive. Then, the inductance value of the actually used inductor branch 1332 is set to be greater than or equal to this minimum value. Then, no matter how the equivalent capacitance of the ultrasonic atomizing plate 12 changes, the equivalent capacitance of the first circuit A1 will always be less than the capacitance of the capacitor branch 1331, thus maintaining the impedance characteristic of the second circuit A2 as inductive.

[0071] Figure 4 The example illustrates one structure of capacitor branch 1331, such as Figure 4 As shown, capacitor branch 1331 includes a first capacitor C1, which is connected in series with the ultrasonic atomizing plate 12. The first capacitor C1 can be located on either the left or right side of the ultrasonic atomizing plate 12; this embodiment does not impose specific limitations on this.

[0072] In one embodiment, the capacitance value of the first capacitor C1 is any value in the range of [1nF, 20nF]. In this embodiment, an ultrasonic atomizing plate 12 with a vibration frequency of 3MHz should typically be selected. In other embodiments, the capacitance value of the first capacitor C1 can be set according to the actual application. For example, in one embodiment, if other vibration frequencies (such as 2.7MHz) are selected, the range of values ​​for the first capacitor C1 should be modified accordingly.

[0073] It should be noted that, in this embodiment, the value range of the first capacitor C1 can be obtained by testing different ultrasonic atomizing sheets 12, so that when using the first capacitor C1, even if the equivalent capacitance of the ultrasonic atomizing sheet 12 changes during operation, or if the individual performance of the ultrasonic atomizing sheet 12 is different, the safety and reliability of the ultrasonic atomizing sheet 12 during use can still be guaranteed.

[0074] In one embodiment, the specific implementation process involves testing the ultrasonic atomizing plates 12 of the same batch to be used to obtain the equivalent capacitance of each ultrasonic atomizing plate 12 when it operates at the series resonant point, and determining the minimum value among the equivalent capacitances. Next, to reduce the capacitance of the load in actual operation, the capacitance of the first capacitor C1 can be selected to be less than the minimum value, thereby limiting the capacitance of the overall equivalent capacitance of the first circuit A1 to near the capacitance of the first capacitor C1. Thus, even if the capacitance of the equivalent capacitance of the ultrasonic atomizing plate 12 changes continuously during operation, or if the individual performance of the ultrasonic atomizing plates 12 varies, the capacitance of the equivalent capacitance of the first circuit A1 remains near the capacitance of the first capacitor C1, and the range of change is small. This facilitates a simpler setup of the corresponding inductive branch 1332 to maintain the impedance characteristic of the second circuit A2 as inductive.

[0075] Meanwhile, it is understandable that the capacitance of the first capacitor C1 cannot be too small; otherwise, the impedance of the first capacitor C1 will be too large, resulting in a smaller current flowing through the ultrasonic atomizing plate 12, and consequently, a lower useful power on the ultrasonic atomizing plate 12. Of course, in other embodiments, the capacitance of the first capacitor C1 can also be selected to be greater than or equal to the minimum value among the equivalent capacitances mentioned above. Although this can also achieve the purpose of keeping the capacitance of the equivalent capacitance of the first circuit A1 within a small range, the capacitance of the equivalent capacitance of the first circuit A1 is greatly affected by the parameters of the ultrasonic atomizing plate 12. Therefore, when the capacitance of the equivalent capacitance of the ultrasonic atomizing plate 12 is too large, there is still a risk that the impedance characteristics of the second circuit A2 may be switched capacitively.

[0076] In summary, by setting the capacitance value of the first capacitor C1 to any value within the range of [1nF, 20nF], on the one hand, it can prevent the abnormal phenomenon of insufficient current flowing through the ultrasonic atomizing plate 12 due to an excessively small capacitance value of the first capacitor C1; on the other hand, it can effectively prevent abnormal phenomena such as severe heating or inconsistent atomization performance of the ultrasonic atomizing plate 12 due to changes in parameters of the ultrasonic atomizing plate 12 during operation or differences in the individual performance of different ultrasonic atomizing plates 12. Therefore, for an ultrasonic atomizing plate 12 with a vibration frequency of 3MHz, the capacitance value range of the first capacitor C1 [1nF, 20nF] is a reasonable range, which not only reduces the heating temperature of the ultrasonic atomizing plate 12, but is also applicable to different ultrasonic atomizing plates 12 with a vibration frequency of 3MHz.

[0077] Figure 4 The diagram also exemplarily illustrates one structure of the inductor branch 1332, such as... Figure 4 As shown, the inductor branch 1332 includes a first inductor L1. The first inductor L1 is connected in parallel with the first circuit A1 (i.e., the circuit composed of the first capacitor C1 and the ultrasonic atomizing sheet 12 connected in series).

[0078] In one embodiment, the inductance value of the first inductor L1 is any value in the range [0.1μH, 2μH]. In this embodiment, an ultrasonic atomizing plate 12 with a vibration frequency of 3MHz is selected as an example. In other embodiments, the inductance value of the first inductor L1 can be set according to the actual application (e.g., the vibration frequency of the ultrasonic atomizing plate 12 used).

[0079] In this embodiment, by setting the lower limit of the inductance value of the first inductor L1 to 0.1 μH, it can be ensured that the first inductor L1 can switch the overall impedance characteristic of the second circuit A2 to inductive, so that the phase between the working voltage and the working current applied to the ultrasonic atomizing plate 12 is within a small range, thereby improving the efficiency of the power supply 14 and reducing the heating power on the ultrasonic atomizing plate 12 to reduce the heating temperature of the ultrasonic atomizing plate 12. At the same time, by setting the upper limit of the inductance value of the first inductor L1 to 2 μH, it can be prevented that the second circuit A2 has too large an obstacle to the alternating current, resulting in too small an alternating current and an abnormal phenomenon of too small a useful power obtained on the ultrasonic atomizing plate 12, so as to maintain the efficiency of the power supply 14.

[0080] Please refer to the above as well. Figure 5 and Figure 6 , Figure 5 The diagram shows the operating voltage and operating current applied to the ultrasonic atomizing plate 12 without the addition of capacitor branch 1331 and inductor branch 1332. Curve L51 represents the operating current applied to the ultrasonic atomizing plate 12, and curve L52 represents the operating voltage applied to the ultrasonic atomizing plate 12. Figure 6 The diagram shows the operating voltage and operating current applied to the ultrasonic atomizing plate 12 when capacitor branch 1331 and inductor branch 1332 are added. Curve L61 represents the operating current applied to the ultrasonic atomizing plate 12, and curve L62 represents the operating voltage applied to the ultrasonic atomizing plate 12.

[0081] In this embodiment, without the addition of capacitor branch 1331 and inductor branch 1332, curve L51 shows that the operating current applied to the ultrasonic atomizing plate 12 is severely distorted and prone to sudden changes, with a large current change (approximately 20mA), which can easily lead to power supply burnout. Simultaneously, curves L51 and L52 show that the phase difference between the operating voltage and current applied to the ultrasonic atomizing plate 12 is significant, resulting in low useful power applied to the ultrasonic atomizing plate 12. Most of the power supplied by power supply 14 is converted into heating power for the ultrasonic atomizing plate 12, causing severe overheating and potentially damaging components such as the ultrasonic atomizing plate 12.

[0082] With the addition of capacitor branch 1331 and inductor branch 1332, as shown by curve L61, the distortion of the working current applied to the ultrasonic atomizing plate 12 is reduced, and the current during sudden changes is small (the current is always maintained between [-10mA, 10mA]), resulting in less damage to the power supply. Simultaneously, the amplitude of the output power supply variation of power supply 14 is also relatively small. Therefore, when controlling the drive power supply by detecting changes in the output power supply of power supply 14 (such as tracking the series resonant frequency point), the control is stable, simple, safe, and reliable, without large overshoot currents, significantly reducing the complexity of control.

[0083] Furthermore, as can be seen from curves L61 and L62, the phase difference between the working voltage and the working current applied to the ultrasonic atomizing plate 12 is small, and they can even be in phase. For example, in one embodiment, when the ultrasonic atomizing plate is working, the phase difference between the working current and the working voltage applied to the ultrasonic atomizing plate 12 is less than 40°. Therefore, the useful power applied to the ultrasonic atomizing plate 12 is relatively high, and most of the power provided by the power supply 14 is converted into the working power of the ultrasonic atomizing plate 12. This reduces the heating power of the ultrasonic atomizing plate 12, thereby lowering its heating temperature and improving the efficiency and stability of its operation.

[0084] Figure 7 Another structure of the inductor branch 1332 is also illustrated, such as... Figure 7 As shown, the inductor branch 1332 includes a second inductor L2.

[0085] The second inductor L2, the capacitor branch 1331, and the ultrasonic atomizing plate 12 are connected in series. Specifically, the second inductor L2 is connected in series with the first circuit A1, and the second inductor L2 is located on the left or right side of the first circuit A1; or the second inductor L2 is connected between the capacitor branch 1331 and the ultrasonic atomizing plate 12.

[0086] In one embodiment, the inductance value of the second inductor L2 is any value in the range of [1μH, 4.7μH].

[0087] In this embodiment, the application of the second inductor L2 is similar to that of the first inductor L1, which is readily understood by those skilled in the art and will not be described in detail here.

[0088] In one embodiment, such as Figure 8 As shown, the drive circuit 132 includes a drive branch 1321, a switch branch 1322, and a boost branch 1323. The drive branch 1321 is connected to the controller 131 and the power supply 14, the switch branch 1322 is connected to the drive branch 1321, and the boost branch 1323 is connected to the power supply 14, the switch branch 1322, and the second circuit A2.

[0089] Specifically, the drive branch 1321 is configured to output a second pulse signal in response to a first pulse signal output by the controller 131 and a current output by the power supply 14. The switch branch 1322 is configured to turn on or off in response to the second pulse signal. The boost branch 1323 is configured to boost the output voltage of the power supply 14 in response to the turning on or off of the switch branch 1322 to generate a first drive signal to drive the ultrasonic atomizing plate 12.

[0090] Please refer to this again. Figure 4 Figure 4 illustrates an exemplary structure of switch branch 1322, as shown below. Figure 4 As shown, the switch branch 1322 includes a first switch Q1 and a second switch Q2. The first switch Q1 is connected to both the drive branch 1321 and the boost branch 1323, and the second switch Q2 is connected to both the drive branch 1321 and the boost branch 1323.

[0091] Specifically, in one embodiment, the first terminal of the first switch Q1 and the first terminal of the second switch Q2 are both connected to the drive branch 1321, the second terminal of the first switch Q1 and the second terminal of the second switch Q2 are both grounded to GND, the third terminal of the first switch Q1 is connected to the first terminal of the boost branch 1323 and the first terminal of the second circuit A2, respectively, and the third terminal of the second switch Q2 is connected to the second terminal of the boost branch 1323 and the second terminal of the second circuit A2, respectively.

[0092] If the second pulse signal output by the drive branch 1321 includes both a first pulse sub-signal and a second pulse sub-signal, then the first switch Q1 is configured to turn on or off in response to the first pulse sub-signal to generate a first voltage signal, and the second switch Q2 is configured to turn on or off in response to the second pulse sub-signal to generate a second voltage signal. The driving voltage used to drive the ultrasonic atomizing plate 12 includes both the first and second voltage signals.

[0093] Simultaneously, the first switch Q1 and the second switch Q2 are alternately turned on. That is, when the first switch Q1 is on, the second switch Q2 is off; when the first switch Q1 is off, the second switch Q2 is on. In one embodiment, both the first switch Q1 and the second switch Q2 are turned on and off with a 50% duty cycle.

[0094] In this embodiment, when the first pulse signal output by the drive branch 1321 includes two sub-signals, the first pulse signal output by the controller 223 should also include two sub-signals, namely a third pulse sub-signal and a fourth pulse sub-signal. Specifically, when the controller 223 outputs the third pulse sub-signal, the drive branch 1321 outputs the first pulse sub-signal; when the controller 223 outputs the fourth pulse sub-signal, the drive branch 1321 outputs the second pulse sub-signal.

[0095] It should be noted that, in this embodiment, both the first switch Q1 and the second switch Q2 are N-type metal-oxide-semiconductor field-effect transistors (hereinafter referred to as NMOS transistors) as examples.

[0096] In this circuit, the gate of the NMOS transistor is the first terminal of the first switch Q1, the source of the NMOS transistor is the second terminal of the first switch Q1, and the drain of the NMOS transistor is the third terminal of the first switch Q1. Similarly, the gate of the NMOS transistor is the first terminal of the second switch Q2, the source of the NMOS transistor is the second terminal of the second switch Q2, and the drain of the NMOS transistor is the third terminal of the second switch Q2.

[0097] In addition, in other embodiments, the first switch Q1 and the second switch Q2 can also be P-type metal-oxide-semiconductor field-effect transistors or signal relays. The first switch Q1 and the second switch Q2 can also be at least one of transistors, insulated-gate bipolar transistors, integrated gate-commutated thyristors, gate-turn-off thyristors, junction-gate field-effect transistors, MOS-controlled thyristors, gallium nitride-based power devices, silicon carbide-based power devices, and silicon controlled thyristors.

[0098] In one embodiment, the switch branch 1322 further includes a first switch branch capacitor C2 and a second switch branch capacitor C3. The first terminal of the first switch branch capacitor C2 is connected to the second terminal of the first switch Q1, and the second terminal of the first switch branch capacitor C2 is connected to the third terminal of the first switch Q1. The first terminal of the second switch branch capacitor C3 is connected to the second terminal of the second switch Q2, and the second terminal of the second switch branch capacitor C3 is connected to the third terminal of the second switch Q2.

[0099] In this embodiment, the first switch branch capacitor C2 and the second switch branch capacitor C3 are the zero-crossing adjustment capacitors for the first switch Q1 and the second switch Q2, respectively. By increasing the first switch branch capacitor C2 and the second switch branch capacitor C3, the transient current and transient voltage on the first switch Q1, the second switch Q2, and the ultrasonic atomizing plate 12 are reduced, even if the voltage changes slowly, to prevent significant impact on the components and improve the working efficiency of the power supply 14.

[0100] In one embodiment, the switch branch 1322 further includes a second resistor R2, a third resistor R3, a fourth resistor R4, and a fifth resistor R5. The first end of the second resistor R2 is connected to pin 7 of the driver chip U1. The second end of the second resistor R2 is connected to the first end of the third resistor R3 and the first end of the first switch Q1. Both the second ends of the third resistor R3 and the first switch Q1 are grounded (GND). The third end of the first switch Q1 is connected to the boost branch 1323 and the second circuit A2. The first end of the fourth resistor R4 is connected to pin 5 of the driver chip U1. The second end of the fourth resistor R4 is connected to the first end of the fifth resistor R5 and the first end of the second switch Q2. Both the second ends of the fifth resistor R5 and the second switch Q2 are grounded (GND). The third end of the second switch Q2 is connected to the boost branch 1323 and the second circuit A2.

[0101] In this embodiment, the second resistor R2 and the third resistor R3 are used to divide the voltage of the pulse signal output from pin 7 of the driver chip U1 to obtain the voltage at the first terminal of the first switch Q1. When the voltage across the third resistor R3 is greater than the on-state voltage of the first switch Q1, the first switch Q1 is turned on; otherwise, the first switch Q1 is turned off.

[0102] The fourth resistor R4 and the fifth resistor R5 are used to divide the voltage of the pulse signal output from pin 5 of the driver chip U1 to obtain the voltage at the first terminal of the second switch Q2. When the voltage across the fifth resistor R5 is greater than the turn-on voltage of the second switch Q2, the second switch Q2 is turned on; otherwise, the second switch Q2 is turned off.

[0103] Figure 4 The diagram also exemplarily illustrates one structure of the drive branch 1321, such as... Figure 4 As shown, the drive branch 1321 includes a drive chip U1, which includes a power input terminal, a first signal input terminal, a second signal input terminal, a first signal output terminal, and a second signal output terminal. In this embodiment, the power input terminal is pin 6 of the drive chip U1, the first signal input terminal is pin 2 of the drive chip U1, the second signal input terminal is pin 4 of the drive chip U1, the first signal output terminal is pin 5 of the drive chip U1, and the second signal output terminal is pin 7 of the drive chip U1.

[0104] Specifically, pin 6 of driver chip U1 is connected to power supply 14. Pins 2 and 4 of driver chip U1 are both connected to controller 131. Pins 5 and 7 of driver chip U1 are both connected to switch branch 1322. Pins 2 and 4 of driver chip U1 are used to input a first pulse signal, and pins 5 and 7 of driver chip U1 are used to output a second pulse signal. Pin 2 of driver chip U1 inputs a third pulse sub-signal, pin 4 of driver chip U1 inputs a fourth pulse sub-signal, pin 7 of driver chip U1 outputs the first pulse sub-signal, and pin 5 of driver chip U1 outputs the second pulse sub-signal.

[0105] In this embodiment, by configuring the driver chip U1, the driving capability of the pulse signal output by the controller 131 is improved. This enables rapid driving of the switch branch 1322, maintaining stable operation of the ultrasonic atomizing plate 12. Simultaneously, the greater the current input to pin 6 of the driver chip U1, the stronger the driving capability output by pins 5 and 7 of the driver chip U1.

[0106] In one embodiment, the driver chip U1 can be an integrated chip of model SGM48000. Of course, other models of integrated chips can also be used in other embodiments, and this application does not limit this. Furthermore, since there are different types of driver chips, the specific pin definitions may differ when using other types of driver chips, but the functions and signal definitions are the same. Therefore, if other types of driver chips are selected, they can be configured in a manner similar to the above embodiments, which is readily understood by those skilled in the art and will not be elaborated further here.

[0107] In this embodiment, power supply 14 is used as the input power source for the driver chip U1. In other words, in this embodiment, power supply 14 simultaneously powers both the driver chip U1 and the ultrasonic atomizing plate 12 to save costs. In other embodiments, to prevent the driver chip U1 and the ultrasonic atomizing plate 12 from interfering with each other during operation, two different power supplies can be used to power the driver chip U1 and the ultrasonic atomizing plate 12 respectively, thereby improving the stability of their operation.

[0108] Figure 4 The diagram also exemplarily illustrates one structure of the boost branch 1323, such as... Figure 4As shown, the boost branch 1323 includes a first boost branch inductor L3 and a second boost branch inductor L4. The first boost branch inductor L3 is connected to the third terminal of the first switch Q1, the power supply 14, and the second circuit A2, respectively. The second boost branch inductor L4 is connected to the third terminal of the second switch Q2, the power supply 14, and the second circuit A2, respectively.

[0109] Specifically, the first boost branch inductor L3 is configured to be charged when the first switch Q1 is turned on, and to generate a first voltage signal for driving the ultrasonic atomizing plate 12 based on the voltage of the power supply 14 and the voltage of the first boost branch inductor L3 when the first switch Q1 is turned off.

[0110] The second boost branch inductor L4 is configured to be charged when the second switch Q2 is turned on, and to generate a second voltage signal for driving the ultrasonic atomizing plate 12 based on the voltage of the power supply 14 and the voltage at which the second boost branch inductor L4 is charged when the second switch Q2 is turned off.

[0111] In this embodiment, when the first switch Q1 is turned on and the second switch Q2 is turned off, the power supply 14, the first boost branch inductor L3, and the first switch Q1 form a circuit, and the first boost branch inductor L3 is charged by the power supply 14. Simultaneously, the power supply 14, the second boost branch inductor L4, the ultrasonic atomizing plate 12, and the first switch Q1 form a circuit, and the voltages on the power supply 14 and the second boost branch inductor L4 simultaneously provide a driving voltage for the ultrasonic atomizing plate 12.

[0112] When the second switch Q2 is turned on and the first switch Q1 is turned off, the power supply 14, the second boost branch inductor L4, and the second switch Q2 form a circuit, and the second boost branch inductor L4 is charged by the power supply 14. At the same time, the power supply 14, the first boost branch inductor L3, the ultrasonic atomizing plate 12, and the second switch Q2 form a circuit, and the voltages on the power supply 14 and the first boost branch inductor L3 simultaneously provide the driving voltage for the ultrasonic atomizing plate 12.

[0113] In one embodiment, such as Figure 9 As shown, the drive branch 132 also includes a current detection sub-branch 1324, which is connected to the power supply 14, the boost branch 1323, and the controller 131. Specifically, the current detection sub-branch 1324 is used to detect the current flowing into the boost branch 1323.

[0114] In this embodiment, the controller 131 can obtain the current flowing into the boost branch 1323 through the current detection sub-branch 1324. Then, the controller 131 can determine whether the ultrasonic atomizing plate 12 has an abnormality such as excessive current during operation based on the current, so that it can deal with the abnormality in time and reduce the risk of damage to the ultrasonic atomizing plate 12.

[0115] Figure 4 The diagram also exemplarily illustrates one structure of the current detection sub-branch 1324, such as... Figure 4 As shown, the current detection sub-branch 1324 includes an amplifier U2 and a first resistor R1. The first resistor R1 is connected to both the amplifier U2 and the boost branch 1323, and the amplifier U2 is connected to the controller 131.

[0116] Specifically, the first end of the first resistor R1 is connected to the power supply 14 and the non-inverting input of the amplifier U2, the second end of the first resistor R1 is connected to the inverting input of the amplifier U2, the first end of the first boost branch inductor L3 and the first end of the second boost branch inductor L4, the output of the amplifier U2 is connected to the controller 13, the grounding terminal of the amplifier U2 is grounded to GND, and the power supply terminal of the amplifier U2 is connected to the voltage V1.

[0117] In this embodiment, amplifier U2 is configured to output a detection voltage based on the voltage across the first resistor R1, so that controller 131 can determine the current flowing into boost branch 1323 based on the detection voltage. Specifically, amplifier U2 can amplify the received voltage across the first resistor R1 by a factor of K before outputting the detection voltage, where K is a positive integer. Subsequently, after acquiring the detection voltage, controller 131 can determine the current flowing into boost branch 1323 based on the relationship between the detection voltage and the current flowing into boost branch 1323.

[0118] In one embodiment, the current detection branch 144 further includes a fourth capacitor C4, a fifth capacitor C5, a sixth resistor R6, and a seventh resistor R7. The fourth capacitor C4 and the fifth capacitor C5 are filter capacitors, the sixth resistor R6 is a current-limiting resistor, and the seventh resistor R7 is a pull-down resistor.

[0119] It should be noted that in the embodiments shown in the figures above, the resistor is presented as a single resistor, and the capacitor as a single capacitor. In other embodiments, the resistor may be an integration of series, parallel, or mixed resistors, and the capacitor may be an integration of series, parallel, or mixed capacitors.

[0120] The connection described in this application can be a direct connection, i.e., a connection between two components, or an indirect connection, i.e., an indirect connection between two components that can be formed through one or more elements.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this application as described above, which are not provided in detail for the sake of brevity; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An ultrasonic atomizing device, characterized in that, include: The liquid reservoir is configured to store a liquid matrix. An ultrasonic atomizing plate is connected to the liquid in the reservoir, and the ultrasonic atomizing plate is configured to generate oscillations to atomize the liquid matrix; Power supply and drive control circuit; The drive control circuit includes a controller, a drive circuit, and an impedance matching circuit; The impedance matching circuit includes a capacitor branch and an inductor branch; the capacitor branch is connected in series with the ultrasonic atomizing plate to form a first circuit, and the inductor branch is connected with the first circuit to form a second circuit, wherein the impedance characteristic of the second circuit is inductive. The driving circuit is connected to the controller, the power supply and the second circuit respectively. The driving circuit is configured to output a driving voltage for driving the ultrasonic atomizing plate based on the control of the controller.

2. The ultrasonic atomizing device according to claim 1, characterized in that, The capacitor branch is configured such that its capacitance is less than the equivalent capacitance of the ultrasonic atomizing plate when it operates at the series resonant frequency.

3. The ultrasonic atomizing device according to any one of claims 1-2, characterized in that, The capacitor branch includes a first capacitor.

4. The ultrasonic atomizing device according to claim 3, characterized in that, The capacitance of the first capacitor is any value in the range [1nF, 20nF].

5. The ultrasonic atomizing device according to any one of claims 1-2, characterized in that, The inductor branch includes a first inductor; The first inductor is connected in parallel with the first circuit.

6. The ultrasonic atomizing device according to claim 5, characterized in that, The inductance value of the first inductor is any value in the range [0.1μH, 2μH].

7. The ultrasonic atomizing device according to any one of claims 1-2, characterized in that, The inductor branch includes a second inductor; The second inductor, the capacitor branch, and the ultrasonic atomizing sheet are connected in series.

8. The ultrasonic atomizing device according to claim 7, characterized in that, The inductance value of the second inductor is any value in the range [1μH, 4.7μH].

9. The ultrasonic atomizing device according to claim 1, characterized in that, The driving circuit includes a driving branch, a switching branch, and a boost branch; The drive branch is connected to the controller and the power supply respectively, and the drive branch is configured to output a second pulse signal in response to a first pulse signal output by the controller and a current output by the power supply. The switch branch is connected to the drive branch, and the switch branch is configured to turn on or off in response to the second pulse signal; The boost branch is connected to the power supply, the switch branch and the second circuit respectively. The boost branch is configured to boost the output voltage of the power supply in response to the on or off of the switch branch to generate the drive voltage.

10. The ultrasonic atomizing device according to claim 9, characterized in that, The switch branch includes a first switch and a second switch. The first switch is connected to the drive branch and the boost branch respectively, and the second switch is connected to the drive branch and the boost branch respectively. The first switch and the second switch are switched on alternately.

11. The ultrasonic atomizing device according to claim 10, characterized in that, The switching branch also includes a first switching branch capacitor and a second switching branch capacitor; The first terminal of the first switch branch capacitor is connected to the second terminal of the first switch, the second terminal of the first switch branch capacitor is connected to the third terminal of the first switch, the first terminal of the second switch branch capacitor is connected to the second terminal of the second switch, and the second terminal of the second switch branch capacitor is connected to the third terminal of the second switch.

12. The ultrasonic atomizing device according to claim 10, characterized in that, The boost branch includes a first boost branch inductor and a second boost branch inductor; The first boost branch inductor is connected to the first switch, the power supply, and the second circuit, respectively, and the second boost branch inductor is connected to the second switch, the power supply, and the second circuit, respectively.

13. The ultrasonic atomizing device according to any one of claims 1-2, characterized in that, When the ultrasonic atomizing plate is working, the working current and working voltage applied to the ultrasonic atomizing plate remain in phase; or When the ultrasonic atomizing plate is working, the phase difference between the working current and the working voltage applied to the ultrasonic atomizing plate is less than 40°.

14. The ultrasonic atomizing device according to any one of claims 1-2, characterized in that, The working voltage waveform of the ultrasonic atomizing plate is an underdamped oscillation or a decreasing oscillation.

15. The ultrasonic atomizing device according to any one of claims 1-2, characterized in that, The operating voltage of the ultrasonic atomizing plate during the initial startup phase is the maximum operating voltage for the entire operating cycle.

16. An ultrasonic atomizing device, characterized in that, include: The liquid reservoir is configured to store a liquid matrix. An ultrasonic atomizing plate is connected to the liquid in the reservoir, and the ultrasonic atomizing plate is configured to generate oscillations to atomize the liquid matrix; Power supply and drive control circuit; The drive control circuit includes a controller, a dual-switch boost drive circuit, and an impedance matching circuit. The impedance matching circuit includes a capacitor branch and an inductor branch; the capacitor branch is connected in series with the ultrasonic atomizing plate to form a first circuit, and the inductor branch is connected with the first circuit to form a second circuit, wherein the impedance characteristic of the second circuit is inductive. The dual-switch boost drive circuit is connected to the controller, the power supply and the second circuit respectively. The dual-switch boost drive circuit is configured to alternately output a first drive voltage and a second drive voltage to drive the ultrasonic atomizing plate based on the control of the controller.

17. The ultrasonic atomizing device according to claim 16, characterized in that, The capacitor branch includes a first capacitor, the capacitance of which is less than the equivalent capacitance of the ultrasonic atomizing plate when it operates at the series resonant frequency.

18. The ultrasonic atomizing device according to any one of claims 16 or 17, characterized in that, The inductor branch includes a first inductor connected in parallel with the first circuit, or the inductor branch includes a second inductor connected in series with the ultrasonic atomizing sheet.

19. An ultrasonic atomizing device, characterized in that, include: Power supply mechanism and ultrasonic atomizer; The ultrasonic atomizer includes: A first housing, wherein a liquid storage chamber is formed within the first housing and is configured to store a liquid matrix; An ultrasonic atomizing plate is disposed within the first housing, the ultrasonic atomizing plate being in communication with the liquid in the storage chamber, and the ultrasonic atomizing plate being configured to generate oscillations upon receiving a driving voltage to atomize the liquid matrix; The power supply mechanism includes: Second shell; A power supply and drive control circuit is disposed in the second housing. The drive control circuit includes a controller, a drive circuit and an impedance matching circuit. The drive circuit is connected to the power supply and the controller respectively. The impedance matching circuit includes a capacitor branch and an inductor branch. When the first housing and the second housing are coupled, the capacitor branch is connected in series with the ultrasonic atomizing plate to form a first circuit, the inductor branch is connected with the first circuit to form a second circuit, and the driving circuit is connected with the second circuit; the driving circuit is configured to output a driving voltage for driving the ultrasonic atomizing plate based on the control of the controller, wherein the impedance characteristic of the second circuit is inductive.

20. The ultrasonic atomizing device according to claim 19, characterized in that, The capacitor branch includes a first capacitor, the capacitance of which is less than the equivalent capacitance of the ultrasonic atomizing plate when it operates at the series resonant frequency.

21. The ultrasonic atomizing device according to any one of claims 19 or 20, characterized in that, The inductor branch includes a first inductor connected in parallel with the first circuit, or the inductor branch includes a second inductor connected in series with the ultrasonic atomizing sheet.

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