WO2022121418A1

WO2022121418A1 - Atomization driving circuit and atomization apparatus

Info

Publication number: WO2022121418A1
Application number: PCT/CN2021/118024
Authority: WO
Inventors: 左召林; 杨旭光; 阳胜; 刘立明
Original assignee: 深圳麦克韦尔科技有限公司
Priority date: 2020-12-10
Filing date: 2021-09-13
Publication date: 2022-06-16
Also published as: CN114618735B; CN114618735A

Abstract

An atomization driving circuit and an atomization apparatus. The atomization driving circuit comprises: an atomization sheet (11), which is used for atomizing a substrate to be atomized; an energy storage circuit (12), which is connected to the atomization sheet (11) and is used for storing electric energy to drive the atomization sheet (11); and a direction switching circuit (13), which is connected to the energy storage circuit (12), wherein the direction switching circuit (13) is used for charging the energy storage circuit (12) in a first charging manner within a first time period by using a power supply voltage, and for charging the energy storage circuit (12) in a second charging manner within a second time period by using the power supply voltage. Therefore, the atomization conversion efficiency is improved.

Description

Atomization drive circuit and atomization device

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority based on Chinese patent application 202011454827.1 filed on December 10, 2020, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the field of electronic atomization devices, and in particular, to an atomization drive circuit and an atomization device.

Background technique

Ultrasonic atomizers generally use vibration excitation to atomize the substrate to be atomized. The method is to send a signal through the drive circuit to drive the ultrasonic atomizing sheet. The ultrasonic atomizing sheet converts electrical energy into ultrasonic energy, and the ultrasonic energy will be atomized. The atomized matrix is atomized into tiny mist particles.

At present, the driving circuits used in the market are generally capacitive three-point self-oscillation circuits and half-wave driving circuits. These atomization driving circuits are cheap, can achieve atomization effect, and can meet the requirements of atomization volume. However, the driving waveforms at both ends of the atomizing sheet are irregular, the conversion efficiency is revealed, and the unilateral driving amplitude is large.

SUMMARY OF THE INVENTION

The present application provides an atomization drive circuit and an atomization device to improve the atomization conversion efficiency.

In order to solve the above technical problems, the first technical solution provided by the present application is to provide an atomization drive circuit, comprising: an atomization sheet for atomizing the substrate to be atomized; an energy storage circuit for connecting the atomization sheet , used to store electrical energy to drive the atomizing sheet; a direction switching circuit, connected to the energy storage circuit, the direction switching circuit is used to use the power supply voltage for the energy storage in a first charging mode in a first period of time The circuit is charged, and the tank circuit is charged with the supply voltage in a second charging manner during a second period of time.

Wherein, the direction switching circuit includes a first input terminal and a second output terminal; when the first input terminal receives a first level signal, the direction switching circuit passes through the first charging path at the first time The energy storage circuit is charged with the power supply voltage within the period; when the second input terminal receives the first level signal, the direction switching circuit passes through the second charging path within the second period of time. The energy storage circuit is charged with the supply voltage.

Wherein, the direction switching circuit further includes a first output terminal and a second output terminal, and the atomizing tablet is connected in parallel with the direction switching circuit through the first output terminal and the second output terminal.

Wherein, the energy storage circuit includes an energy storage element, and the energy storage element is connected in series with the atomizing sheet and connected to the first output end.

Wherein, the first charging path includes: a first push-pull circuit, the first push-pull circuit is connected to a power supply and the first output terminal; when the first input terminal receives the first level signal , the first push-pull circuit uses the power supply voltage provided by the power supply to charge the energy storage element from the first node of the energy storage element through the first output terminal.

Wherein, the first charging circuit further includes: a first switch circuit, the first switch circuit is connected to the first input terminal and the first push-pull circuit; When a level signal is present, the first switch circuit is turned on to increase the driving capability of the first push-pull circuit.

Wherein, the second charging path includes: a second push-pull circuit, the second push-pull circuit is connected to a power supply and the second output terminal; when the second input terminal receives the first level signal , the second push-pull circuit uses the power supply voltage provided by the power supply to charge the energy storage element from the second node of the energy storage element through the second output terminal.

Wherein, the second charging path includes: a second switch circuit, the second switch circuit is connected to the second input terminal and the second push-pull circuit; the second input terminal receives the first When the level signal is applied, the second switch circuit is turned on, so as to increase the driving capability of the second push-pull circuit.

Wherein, the first push-pull circuit includes: a second switch including a first channel end, a second channel end and a control end, the control end of the second switch is connected to the first input end, the second The first channel end of the switch is connected to the power supply, the second channel end of the second switch is connected to the first output end; the third switch includes a first channel end, a second channel end and a control end, the The control terminal of the third switch is connected to the second input terminal, the first channel terminal of the third switch is connected to the first output terminal, and the second channel terminal of the third switch is grounded; the first switch circuit Including: a first switch, which includes a first channel end, a second channel end and a control end, the control end of the first switch is connected to the first input end to receive the first level signal, the first The first channel terminal of a switch is connected to the power supply and the control terminal of the second switch, and the second channel terminal of the first switch is grounded.

Wherein, the second push-pull circuit includes: a fifth switch including a first channel end, a second channel end and a control end, the control end of the fifth switch is connected to the second input end, the fifth switch The first channel end of the switch is connected to the power supply, the second channel end of the fifth switch is connected to the second output end; the sixth switch includes a first channel end, a second channel end and a control end, the The control terminal of the sixth switch is connected to the first input terminal, the first channel terminal of the sixth switch is connected to the second output terminal, and the second channel terminal of the sixth switch is grounded; the second switch circuit It includes: a fourth switch, which includes a first channel end, a second channel end and a control end, the control end of the fourth switch is connected to the second input end to receive the first level signal, the first channel end The first channel terminal of the four switches is connected to the power supply and the control terminal of the fifth switch, and the second channel terminal of the fourth switch is grounded.

Wherein, the atomization drive circuit further includes: a capacitor, and the capacitor is connected in parallel with the atomization sheet.

In order to solve the above technical problems, the second technical solution provided by the present application is to provide an atomization device, comprising: the atomization drive circuit described in any one of the above.

The beneficial effect of the present application is that, different from the situation in the prior art, the atomization drive circuit provided by the present application can use the power supply voltage to charge the energy storage circuit in the first time period in the first charging method, and in the second time period Using the power supply voltage to charge the energy storage circuit within the time period in a second charging manner, so as to increase the driving voltage of the energy storage circuit for driving the atomizing sheet; The voltage is the same, which improves the atomization conversion efficiency.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, under the premise of no creative work, other drawings can also be obtained from these drawings, wherein:

1 is a schematic structural diagram of a first embodiment of an atomization drive circuit of the present application;

2 is a schematic structural diagram of a second embodiment of an atomization drive circuit of the present application;

3 is a schematic structural diagram of a third embodiment of an atomization drive circuit of the present application;

4 is a waveform diagram of a first level signal and a second level signal;

Fig. 5 is the voltage waveform diagram of point A and point B of the application;

6 is a voltage waveform diagram of point A and point D of the application;

7 is a waveform diagram of the superimposed voltages at both ends of the atomizing sheet of the present application;

8 is a waveform diagram of the superimposed voltages at both ends of the atomizing sheet in the prior art;

FIG. 9 is a schematic structural diagram of an embodiment of the atomizing device of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

Please refer to FIG. 1 , which is a schematic structural diagram of the first embodiment of the atomization drive circuit of the present application. Specifically, the atomization drive circuit includes an atomization sheet 11 , an energy storage circuit 12 and a direction switching circuit 13 .

Wherein, the atomizing sheet 11 is used for atomizing the substrate to be atomized. The energy storage circuit 12 is connected to the atomizing sheet 11 for storing electric energy to drive the atomizing sheet 11 . The direction switching circuit 13 is connected to the energy storage circuit 12 and the atomizing sheet 11, and the direction switching circuit 13 is used for charging the energy storage circuit 12 with the power supply voltage in the first charging mode in the first period of time, and in the second period of time. The energy storage circuit 12 is charged by the power supply voltage in the second charging mode, so as to increase the driving voltage of the energy storage circuit 12 for driving the atomizing sheet 11 . Specifically, the first charging method is to use the power supply voltage to charge the energy storage circuit 12 from point A to point B, and the second charging method is to use the power supply voltage to charge the energy storage circuit 12 from point B to point A.

Specifically, the direction switching circuit 13 includes a first input terminal m1 and a second input terminal m2. When the first input terminal m1 receives the first level signal, the direction switching circuit 13 uses the power supply voltage to charge the energy storage circuit 12 through the first charging path within the first period of time. At this time, the power supply voltage charges the energy storage circuit 12 from point A to point B. It can be understood that when the first input terminal m1 receives the first level signal, the second input terminal m2 receives the second level signal.

When the second input terminal m2 receives the first level signal, the direction switching circuit 13 uses the power supply voltage to charge the energy storage circuit 12 through the second charging path in the second time period. At this time, the power supply voltage charges the energy storage circuit 12 from point B to point A. It can be understood that when the second input terminal m2 receives the first level signal, the first input terminal m1 receives the second level signal .

Specifically, as shown in FIG. 1 , when the first input terminal m1 receives the first level signal, the direction switching circuit 13 starts to charge the energy storage circuit 12 with the power supply voltage from point A within the first time period. When the second input terminal m2 receives the first level signal, the direction switching circuit 13 starts to charge the energy storage circuit 12 with the power supply voltage from point B within the second time period. In this way, the energy storage circuit 12 can be in the positive and reverse charging states in a time-sharing manner, thereby realizing the voltage doubling function, increasing the peak voltage of the sine wave at both ends of the atomizing sheet 11, thereby increasing the driving amplitude and improving the atomization efficiency.

Please refer to FIG. 2 , which is a schematic structural diagram of a second embodiment of the atomization drive circuit of the present application. Compared with the first embodiment described above, the difference is that in this embodiment, the atomization drive circuit further includes a capacitor C. Specifically, the capacitor C is connected in parallel with the atomizing sheet 11 and connected in series with the energy storage circuit 12 . Capacitor C is used to filter out the clutter in the sine wave.

Please refer to FIG. 3 , which is a schematic structural diagram of the third embodiment of the atomization drive circuit of the present application. Specifically, in this embodiment, the direction switching circuit 13 further includes a first output end n1 and a second output end n2, and the atomizing chip 11 is connected in parallel with the direction switching circuit 13 through the first output terminal n1 and the second output terminal n2. Specifically, the atomizing sheet 11 includes a first end (point B in FIG. 3 ) and a second end (point D in FIG. 3 ), wherein the first end of the atomizing sheet 11 is connected to the first output end n1, and the mist The second end of the chip 11 is connected to the second output end n2.

The energy storage circuit 12 includes an energy storage element L, and the energy storage element L is connected in series with the atomizing sheet 11 and connected to the first output terminal n1. In a specific embodiment, the energy storage element L is an inductor, which includes a first end and a second end, wherein the second end of the energy storage element L (point B in FIG. 3 ) is connected to the first end of the atomizing sheet 11 . terminal, the first terminal of the energy storage element L (point A in FIG. 3 ) is connected to the first output terminal n1.

When the first input terminal m1 receives the first level signal, the direction switching circuit 13 uses the power supply voltage VCC to charge the energy storage circuit 12 through the first charging path in the first period of time. The first charging path includes: a first push-pull circuit 132 . The first push-pull circuit 132 is connected to the power supply and the first output terminal n1. When the first input terminal m1 receives the first level signal, the first push-pull circuit 132 charges the energy storage element L from the first node A through the first output terminal n1 using the power supply voltage VCC provided by the power supply.

Further, the first charging path further includes: a first switch circuit 131 . The first switch circuit 131 is connected to the first input terminal m1 and the first push-pull circuit 132 . When the first input terminal m1 receives the first level signal, the first switch circuit 131 is turned on, so that the first push-pull circuit 132 uses the power supply voltage VCC provided by the power supply to pass through the first output terminal n1 from the first node A to The energy storage element L is charged. The first switch circuit 131 can increase the driving capability of the first push-pull circuit 132 .

When the second input terminal m2 receives the first level signal, the direction switching circuit 13 charges the energy storage circuit 12 with the power supply voltage VCC in the second time period through the second charging path. The second charging path includes: a second push-pull circuit 134 . The second push-pull circuit 134 is connected to the power supply and the second output terminal n2. When the second input terminal m2 receives the first level signal, the second push-pull circuit 134 charges the energy storage element L from the second node B through the second output terminal n2 using the power supply voltage VCC provided by the power supply.

Further, the second charging path further includes: a second switch circuit 133 . The second switch circuit 133 is connected to the second input terminal m2 and the second push-pull circuit 134 . When the second input terminal m2 receives the first-level signal, the second switch circuit 133 is turned on, so that the second push-pull circuit 134 uses the power supply voltage VCC provided by the power supply to pass through the second output terminal n2 from the second node B to The energy storage element L is charged. The second switch circuit 133 can increase the driving capability of the second push-pull circuit 134 .

Specifically, the first push-pull circuit 132 includes: a second switch Q2 and a third switch Q3; wherein, the second switch Q2 includes a first channel terminal, a second channel terminal and a control terminal, and the control terminal of the second switch Q2 is connected to the first channel terminal. An input terminal m1, the first channel terminal of the second switch Q2 is connected to the power supply to receive the power supply voltage VCC, and the second channel terminal of the second switch Q2 is connected to the first output terminal n1. The third switch Q3 includes a first channel terminal, a second channel terminal and a control terminal. The control terminal of the third switch Q3 is connected to the second input terminal m2. When the first input terminal m1 receives the first level signal, the second input terminal m2 , receiving the second level signal; the first channel end of the third switch Q3 is connected to the first output end n1, and the second channel end of the third switch Q3 is grounded to GND. Specifically, when the first input terminal m1 receives the first level signal, the first switch Q1 is turned on in response to the first level signal, and the second switch Q2 is turned on; at this time, the second input terminal m2 receives the second level signal. level signal, the third switch Q3 is turned off. The power supply voltage VCC charges the energy storage element L from the first output terminal n1 through the turned-on second switch Q2, and the current flows from the first node A to the second node B, as shown by the arrow H1 in the figure.

Specifically, the first switch circuit 131 includes: a first switch Q1. The first switch Q1 includes a first channel terminal, a second channel terminal and a control terminal. The control terminal of the first switch Q1 is connected to the first input terminal m1. When the input terminal m2 receives the second level signal, the first input terminal m1 receives the first level signal, or when the second input terminal m2 receives the first level signal, the first input terminal m1 receives the second level signal . The first channel terminal of the first switch Q1 is connected to the power supply to receive the power supply voltage VCC, and the second channel terminal of the first switch Q1 is grounded to GND. In an embodiment, a first resistor R1 is further included, a first end of the first resistor R1 is connected to a power source, and a second end of the first resistor R1 is connected to the first pass terminal of the first switch Q1. Specifically, when the first input terminal m1 receives the first level signal, the first switch Q1 is turned on in response to the first level signal; when the first input terminal m1 receives the second level signal, the first switch Q1 is turned on deadline.

Specifically, the second push-pull circuit 134 includes: a fifth switch Q5 and a sixth switch Q6. The fifth switch Q5 includes a first channel terminal, a second channel terminal and a control terminal, the control terminal of the fifth switch Q5 is connected to the second input terminal m2, and the first channel terminal of the fifth switch Q5 is connected to the power supply to receive the power supply voltage VCC, the second channel terminal of the fifth switch Q5 is connected to the second output terminal n2. The sixth switch Q6 includes a first channel terminal, a second channel terminal and a control terminal. The control terminal of the sixth switch Q6 is connected to the first input terminal m1. When the first input terminal m1 receives the first level signal at the second input terminal m2 , receiving the second level signal; the first channel end of the sixth switch Q6 is connected to the second output end n2, and the second channel end of the sixth switch Q6 is grounded to GND. Specifically, when the second input terminal m2 receives the first level signal, the fourth switch Q4 is turned on in response to the first level signal, and the fifth switch Q5 is turned on; at this time, the first input terminal m1 receives the second level signal. level signal, the sixth switch Q6 is turned off. The power supply voltage VCC charges the energy storage element L from the second output terminal n2 through the turned-on fifth switch Q5. At this time, the current flows from the second node B to the first node A, as shown by the arrow H2 in the figure.

Specifically, the second switch circuit 133 includes: a fourth switch Q4, the fourth switch Q4 includes a first channel end, a second channel end and a control end, the control end of the fourth switch Q4 is connected to the second input end m2, When the input terminal m1 receives the second level signal, the second input terminal m2 receives the first level signal, or when the first input terminal m1 receives the first level signal, the second input terminal m2 receives the second level signal . The first channel terminal of the fourth switch Q4 is connected to the power supply to receive the power supply voltage VCC, and the second channel terminal of the fourth switch Q4 is grounded to GND. In one embodiment, a second resistor R2 is further included, a first end of the second resistor R2 is connected to a power source, and a second end of the second resistor R2 is connected to the first pass terminal of the fourth switch Q4. Specifically, when the second input terminal m2 receives the first level signal, the fourth switch Q4 is turned on in response to the first level signal; when the second input terminal m2 receives the second level signal, the fourth switch Q4 is turned off .

Wherein, the first level signal and the second level signal are time-divisionally switched to form a PWM signal. The first level signal cannot be high/low at the same time. In one embodiment, the first level signal and the second level signal are directly output complementary PWM waveforms, or, in another embodiment, the first level signal and the second level signal are controlled by other devices. It is then maintained as a complementary PWM waveform, as shown in Figure 4, wherein, PWM1 is the PWM signal applied to the first input terminal m1, and PWM2 is the PWM signal applied to the second input terminal m2, which respectively include A level signal F1 and a second level signal F2.

Wherein, the atomization driving circuit further includes: a capacitor C, and the capacitor C is connected in parallel with the atomizing sheet 11 . Specifically, the capacitor C includes a first end and a second end. The first end of the capacitor C is connected to the first end of the atomizing chip 11 , and the second end of the capacitor C is connected to the second end of the atomizing chip 11 .

In a specific embodiment, the first level signal is a high level signal, and the second level signal is a low level signal.

Among them, the first switch Q1, the second switch Q2, the sixth switch Q6, the third switch Q3, the fourth switch Q4, and the fifth switch Q5 may be the MOS transistors shown in the figure, or may be triodes, which will not be described here. limited.

Specifically, in the first time period, when the first input terminal m1 receives the first level signal, the second input terminal m2 receives the second level signal. At this time, the first switch Q1, the second switch Q2, and the sixth switch Q6 are turned on, and the third switch Q3, the fourth switch Q4, and the fifth switch Q5 are turned off. The power supply voltage VCC is output through the first output terminal n1 through the second switch Q2, and the energy storage element L is charged from the first node A of the energy storage element L. At this time, the charging current flows from left to right, as shown by the arrow in the figure. shown in H1.

During the first time period, when the second input terminal m2 receives the first level signal, the first input terminal m1 receives the second level signal. At this time, the first switch Q1, the second switch Q2, and the sixth switch Q6 are turned off, and the third switch Q3, the fourth switch Q4, and the fifth switch Q5 are turned on. The power supply voltage VCC is output through the second output terminal n2 through the fifth switch Q5, and the energy storage element L is charged from the second node B of the energy storage element L. At this time, the charging current flows from right to left, as shown by the arrow in the figure. shown in H2.

Since the energy storage element L is an inductance, according to the principle that the current of the inductance cannot change abruptly, but the voltage can change abruptly, when the level signal received by the first input terminal m1 and the second input terminal m2 is converted, the current of the energy storage element L needs to be changed. First decrease and then increase in reverse, and the voltage waveforms at the first node A and the second node B of the energy storage element L are as shown in Figure 5, where the solid line is the voltage waveform at point B, and the dotted line is the voltage waveform at point A voltage waveform.

Specifically, during the first time period t1, the first input terminal m1 receives the first level signal, and the second input terminal m2 receives the second level signal. At this time, the energy storage element L is charged from the first node A of the energy storage element L, and the current flows from left to right, as shown by H1 in FIG. 3 , so that the voltage of the second node B of the energy storage element L is gradually Increase, as shown by the solid line 1 in FIG. 5 , when the voltage of the second node B rises to the highest point and starts to discharge, the voltage at the second node B begins to drop.

During the second time period t2, when the first input terminal m1 receives the second level signal, the second input terminal m2 receives the first level signal. At this time, the voltage of the energy storage element L changes abruptly, and the voltage of the second node B is superimposed due to the reverse connection of the input voltage to increase the voltage, as shown by the solid line 2 in FIG. 5 . At this time, the energy storage element L continues to discharge, and the current flowing through the energy storage element L from left to right continues to decrease and then begins to reverse, that is, until the discharge is complete, the current flows from right to left to start charging.

In the third time period t3, the switching continues, the first input terminal m1 receives the first level signal, and the second input terminal m2 receives the second level signal. According to the principle that the voltage of the inductor can change suddenly, the second node The voltage at point B gradually increases, and when it reaches the highest point, discharge begins, and the voltage at the second node B begins to drop.

In the fourth time period t4, the switching continues, the first input terminal m1 receives the second level signal, the second input terminal m2 receives the first level signal, the voltage of the energy storage element L suddenly changes, the second node The voltage of B is due to the reverse connection of the input voltage, which superimposes the input voltage to increase the voltage. At this time, the energy storage element L continues to discharge, and the current flowing through the energy storage element L from left to right continues to decrease and then begins to reverse, that is, until After the discharge is complete, the charging starts with the current flowing from right to left.

During the above-mentioned process of changing the waveform of the voltage of the energy storage element L, the waveform of the atomizing sheet 11 changes as shown in FIG. 6 . The dotted line 5 is the waveform of point A; the solid line 6 is the waveform of point D.

The waveform of the upper part (point B) and the lower part (point D) of the atomizing sheet 11 can be obtained by referring to FIG. 5 and FIG. 6 . Specifically, the atomizing sheet can be obtained by subtracting the waveform of point D from the waveform of point B. 11 The waveform after the upper part and the lower part are superimposed, as shown in Figure 7. The waveform after the upper part and the lower part of the atomizing sheet 11 are superimposed is a regular sine wave waveform, which can improve the atomization efficiency.

In this embodiment, the peak voltage is low, the atomizing sheet is not easily damaged, and the peak voltage can be automatically reduced when the substrate to be atomized disappears, thereby protecting the atomizing sheet 11 and preventing the atomizing sheet 11 from being damaged by dry burning. Specifically, when the substrate to be atomized disappears, the load voltage will increase, and the power supply voltage VCC will remain unchanged, so the voltage across the energy storage element L will decrease. At this time, the current of the energy storage element L will decrease, and the energy storage will decrease. The peak voltage is reduced, thereby reducing the occurrence of dry burning. Specifically, the load (substrate to be atomized) is connected in parallel at both ends of the atomizing sheet 11. Since the capacitor voltage cannot be abruptly changed, the current can be abruptly changed. When the substrate to be atomized disappears, the voltage remains unchanged, while the load current gradually decreases, even disappears, at this time, the voltage across the energy storage element L cannot be abruptly changed, and if the current is to decrease, the energy storage of the energy storage element L decreases, so the peak voltage decreases. As for the half-wave drive circuit, since the energy storage element is connected in series with a capacitor, the capacitor voltage cannot change abruptly. When the atomized substrate disappears, the peak voltage basically does not change, and it is easy to dry and damage the atomizing sheet.

In the existing full-wave drive circuit, the waveforms at both ends of the atomizing plate are shown in Figure 8, which are irregular sine waves formed by splicing the half-wave above the coordinate axis and the half-wave below, and there will be dead waves during splicing. area, making the atomization conversion efficiency low. The atomization driving circuit of the present application does not have the problem that the positive half-wave and the negative half-wave cannot be connected, thereby improving the atomization efficiency.

In the prior art, if the energy storage element cannot be charged forward and reverse, a capacitor generally needs to be connected in series behind the energy storage element, and the capacitor is used for energy storage, charging and discharging. However, if the capacitor is set, the peak voltage does not change, and the phenomenon of dry burning is prone to occur. The atomization drive circuit of the present application can convert the power supply and the ground terminal for forward charging and reverse charging, so there is no need to add a capacitor behind the energy storage element, and the peak voltage of the solution of the present application is reduced, thereby reducing dry burning. occur.

Please refer to FIG. 9 , which is a schematic structural diagram of an embodiment of an atomizing device of the present application. Specifically, the atomizing device 80 includes an atomizing driving circuit 81 , which is the above-mentioned atomizing driving circuit 81 .

The atomizing device 80 of the present application has a low peak voltage on the atomizing sheet, which is not easy to damage the atomizing sheet, and can automatically reduce the peak voltage when the substrate to be atomized disappears, thereby protecting the atomizing sheet and preventing dry burning from damaging the atomization piece. Specifically, when the substrate to be atomized disappears, the load voltage will increase, and the power supply voltage VCC will remain unchanged, so the voltage across the energy storage element L will decrease. At this time, the current of the energy storage element L will decrease, and the energy storage will decrease. The peak voltage is reduced, thereby reducing the occurrence of dry burning.

The above are only the embodiments of the present application, and are not intended to limit the scope of the patent of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present application, or directly or indirectly applied in other related technical fields, All are similarly included in the scope of patent protection of the present application.

Claims

An atomization drive circuit, comprising:

Atomizing tablet for atomizing the substrate to be atomized;

an energy storage circuit, connected to the atomizing sheet, for storing electrical energy to drive the atomizing sheet;

The direction switching circuit is connected to the energy storage circuit, and the direction switching circuit is used for charging the energy storage circuit with the power supply voltage in the first charging mode in the first time period, and charging the energy storage circuit in the second time period with the first charging mode. The second charging method utilizes the power supply voltage to charge the energy storage circuit.
The circuit of claim 1, wherein the direction switching circuit comprises a first input terminal and a second output terminal;

When the first input terminal receives a first level signal, the direction switching circuit uses the power supply voltage to charge the energy storage circuit through the first charging path within the first time period;

When the second input terminal receives the first level signal, the direction switching circuit uses the power supply voltage to charge the energy storage circuit through the second charging path in the second time period.
The circuit according to claim 2, wherein the direction switching circuit further comprises a first output terminal and a second output terminal, and the atomizer chip communicates with the other through the first output terminal and the second output terminal. The direction switching circuits are connected in parallel.
The circuit according to claim 3, wherein the energy storage circuit comprises an energy storage element, and the energy storage element is connected in series with the atomizing sheet and connected to the first output terminal.
5. The circuit of claim 4, wherein the first charging path comprises:

a first push-pull circuit, the first push-pull circuit is connected to the power supply and the first output end; when the first input end receives the first level signal, the first push-pull circuit utilizes the The power supply voltage provided by the power supply charges the energy storage element from the first node of the energy storage element through the first output terminal.
The circuit of claim 5, wherein the first charging circuit further comprises:

a first switch circuit, the first switch circuit is connected to the first input terminal and the first push-pull circuit; when the first input terminal receives the first level signal, the first switch The circuit is turned on to increase the driving capability of the first push-pull circuit.
5. The circuit of claim 4, wherein the second charging path comprises:

a second push-pull circuit, the second push-pull circuit is connected to the power supply and the second output terminal; when the second input terminal receives the first level signal, the second push-pull circuit uses the The power supply voltage provided by the power supply charges the energy storage element from the second node of the energy storage element through the second output terminal.
8. The circuit of claim 7, wherein the second charging path comprises:

a second switch circuit, the second switch circuit is connected to the second input terminal and the second push-pull circuit; when the second input terminal receives the first level signal, the second switch The circuit is turned on to increase the driving capability of the second push-pull circuit.
The circuit of claim 6, wherein the first push-pull circuit comprises:

The second switch includes a first channel end, a second channel end and a control end, the control end of the second switch is connected to the first input end, and the first channel end of the second switch is connected to the power supply, The second channel end of the second switch is connected to the first output end;

A third switch includes a first channel end, a second channel end and a control end, the control end of the third switch is connected to the second input end, and the first channel end of the third switch is connected to the first channel an output end, the second path end of the third switch is grounded;

The first switch circuit includes:

a first switch, which includes a first channel end, a second channel end and a control end, the control end of the first switch is connected to the first input end to receive the first level signal, the first switch The first channel terminal of the first switch is connected to the power supply and the control terminal of the second switch, and the second channel terminal of the first switch is grounded.
The circuit of claim 8, wherein the second push-pull circuit comprises:

a fifth switch, which includes a first channel end, a second channel end and a control end, the control end of the fifth switch is connected to the second input end, and the first channel end of the fifth switch is connected to the power supply, The second channel end of the fifth switch is connected to the second output end;

a sixth switch, which includes a first channel end, a second channel end and a control end, the control end of the sixth switch is connected to the first input end, and the first channel end of the sixth switch is connected to the second channel end an output end, the second path end of the sixth switch is grounded;

The second switch circuit includes:

a fourth switch, comprising a first channel terminal, a second channel terminal and a control terminal, the control terminal of the fourth switch is connected to the second input terminal to receive the first level signal, the fourth switch The first channel terminal of the 1 is connected to the power supply and the control terminal of the fifth switch, and the second channel terminal of the fourth switch is grounded.
The circuit of claim 4, wherein the atomization drive circuit further comprises:

A capacitor is connected in parallel with the atomizing sheet.
An atomization device, comprising the atomization drive circuit according to any one of claims 1 to 11.