Control method, power supply circuit and ultrasonic atomization equipment

Abstract

The invention relates to a control method, a power supply circuit and ultrasonic atomization equipment, the control method is used for controlling the power supply circuit of an atomization assembly, and the control method specifically comprises the steps that the input voltage of the power supply circuit is obtained; generating a first driving signal with a variable duty ratio and a second driving signal with an invariable duty ratio according to the input voltage, and outputting a target driving signal according to the first driving signal and the second driving signal; and controlling power supply output of the power supply circuit according to the target driving signal so as to supply power to the atomization assembly through the power supply output. When the voltage of the power supply circuit of the atomization equipment changes, the atomization effect of the atomization equipment can be guaranteed.

Description

Technical Field

[0001] The present application relates to the technology of atomizing devices, and more specifically, to a control method, a power supply circuit, and an ultrasonic atomizing device. Background Art

[0002] As a portable device, an atomizing device is usually powered by a power supply battery during operation. The power supply voltage of the power supply battery will gradually decrease the use of the atomizing device, thereby affecting the working power of the atomizing device. During the operation of the atomizing device, its working power directly affects the atomizing effect, and thus affects the user experience. For example, when the atomizing power is reduced, the corresponding atomizing amount will also decrease, affecting the user's use. Therefore, how to ensure the atomizing effect when the power supply voltage changes and then improve the user experience is particularly important. Summary of the Invention

[0003] The present application provides a control method, a power supply circuit, and an ultrasonic atomizing device, which are used to solve the technical defect that in the prior art, when the power supply voltage of the atomizing device changes, the atomizing power changes, thereby affecting the atomizing effect.

[0004] The present application provides a control method for controlling the power supply circuit of an atomizing component. The method includes:

[0005] Obtaining the input voltage of the power supply circuit;

[0006] Generating a first driving signal with a variable duty cycle and a second driving signal with an unchangeable duty cycle according to the input voltage, and outputting a target driving signal according to the first driving signal and the second driving signal;

[0007] Controlling the power supply output of the power supply circuit according to the target driving signal, so as to supply power to the atomizing component through the power supply output.

[0008] In some embodiments, in the control method of the present application, the generating the first driving signal with a variable duty cycle includes:

[0009] In some embodiments, in the control method of the present application, the generating the first driving signal with a variable duty cycle includes:

[0010] Adjusting the duty cycle of the first driving signal according to the input voltage.

[0011] In some embodiments, in the control method of the present application, the generating the first driving signal with a variable duty cycle further includes:

[0012] Adjusting the duty cycle of the first driving signal according to the target power of the atomizing component.

[0013] In some embodiments, in the control method described in the present application, it further includes:

[0014] Configuring the frequency of the second drive signal according to the operating frequency of the atomization component.

[0015] In some embodiments, in the control method described in the present application, the outputting a target drive signal according to the first drive signal and the second drive signal includes:

[0016] When the first drive signal is at a high level, using the second drive signal as the target drive signal;

[0017] When the first drive level is at a low level, using the first drive signal as the target drive signal.

[0018] The present application provides a power supply circuit applied to an atomization component, and the power supply circuit includes:

[0019] A boost unit, the boost unit is connected to an input voltage, and is used to provide a power supply output according to the input voltage to supply power to the atomization component through the power supply output;

[0020] A controller, the controller is configured to generate a first drive signal with a variable duty cycle and a second drive signal with a non-variable duty cycle respectively, and output a target drive signal according to the first drive signal and the second drive signal;

[0021] A drive switch, the drive switch is connected to the controller and is used to receive the target drive signal to adjust the conduction time;

[0022] Wherein, the boost unit is electrically connected to the drive switch, and the boost unit adjusts the power supply output according to the conduction time of the drive switch.

[0023] In some embodiments, in the power supply circuit described in the present application, the controller is used to obtain the input voltage and / or the target power of the atomization component, and adjust the duty cycle of the first drive signal according to the input voltage and / or the target power of the atomization component.

[0024] In some embodiments, in the power supply circuit described in the present application, the controller is configured to set the duty cycle of the first drive signal according to the square of the ratio of the input voltage to the target voltage corresponding to the target power of the atomization component.

[0025] In some embodiments, in the power supply circuit described in the present application, the controller is further used to obtain the operating frequency of the atomization component and configure the frequency of the second drive signal according to the operating frequency of the atomization component.

[0026] In some embodiments, in the power supply circuit described in the present application, the controller is further configured to,

[0027] when the first driving signal is at a high level, use the second driving signal as the target driving signal;

[0028] when the first driving level is at a low level, use the first driving signal as the target driving signal.

[0029] In some embodiments, in the power supply circuit described in the present application, the boosting unit includes a boosting inductor. The first end of the boosting inductor is connected to the positive electrode of the power supply battery, the second end of the boosting inductor is connected to the first end of the atomizing component, and the third end of the boosting inductor is connected to the second end of the atomizing component; and / or,

[0030] the driving switch includes a driving resistor and a MOS transistor; the first end of the driving resistor is configured to receive the target driving signal, the second end of the driving resistor is connected to the control end of the MOS transistor, the first end of the MOS transistor is connected to the boosting unit, and the second end of the MOS transistor is grounded.

[0031] The present application provides an ultrasonic atomizing device, including an atomizing component and the power supply circuit as described above.

[0032] Implementing a control method, a power supply circuit and an ultrasonic atomizing device of the present application has the following beneficial effects: it can ensure the atomizing effect of the atomizing device when the voltage of the power supply circuit of the atomizing device changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0034] Figure 1 is a program flow chart of a control method according to an embodiment of the present application;

[0035] Figure 2 is a program flow chart of a control method according to another embodiment of the present application;

[0036] Figure 3 is a schematic diagram of the generation of a target driving signal in a control method according to an embodiment of the present application;

[0037] Figure 4 is a circuit schematic diagram of a power supply circuit according to an embodiment of the present application;

[0038] Figure 5 is a logic block diagram of an atomizing device according to an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] In order to have a clearer understanding of the technical features, objectives, and effects of the present application, the specific implementation manners of the present application will now be described in detail with reference to the accompanying drawings.

[0040] As Figure 1 shown, an embodiment of the control method of the present application is shown. This control method is used to control the power supply circuit of the atomization component in the atomization device, so as to ultimately realize the control process of the atomization power of the atomization device. In Figure 1 the control method of the present application shown, this control method includes the following steps: S1, obtaining the input voltage of the power supply circuit; S2, generating a first driving signal with a variable duty cycle and a second driving signal with a non-variable duty cycle according to the input voltage, and outputting a target driving signal according to the first driving signal and the second driving signal; S3, controlling the power supply output of the power supply circuit according to the target driving signal, so as to supply power to the atomization component through the power supply output.

[0041] Based on step S1, during the operation of the atomization device, the input voltage of the power supply circuit in the atomization device is obtained in real time, that is, the output voltage of the power supply battery.

[0042] It can be understood that when the operation of the atomization device is powered by its internal power supply battery, this power supply circuit provides power input through the power supply battery and performs signal processing to adjust the power supply output. Among them, the specific process of obtaining the output voltage of the power supply battery may include: sampling through a corresponding sampling circuit and performing signal processing on the sampling result to obtain the final voltage value. The sampling circuit can be set at the output end of the power supply battery or at the input end of the power supply circuit.

[0043] Based on step S2, during the operation of the atomization device, the power supply circuit can be driven to work through corresponding driving signals. When the atomization device is working, the output voltage of the power supply circuit is adjusted by adjusting the driving signal, and then the purpose of adjusting the atomization power of the atomization component in the atomization device is achieved. In the embodiment of the present application, a target driving signal can be generated based on the obtained input voltage of the power supply circuit, so as to control the output voltage of the power supply circuit through this target driving signal, so that the output voltage of the power supply circuit meets the atomization power requirements of the atomization component, and the atomization power of the atomization component is matched with the input voltage.

[0044] In a specific embodiment, before generating the target drive signal, a first drive signal with a variable duty cycle and a second drive signal with a fixed duty cycle are generated respectively, and the final target drive signal is obtained by processing the first drive signal and the second drive signal. The duty cycle of the first drive signal can vary with the input voltage, while the duty cycle of the second drive signal remains constant. That is, when the input voltage of the power supply circuit changes, the duty cycle of the first drive signal may change, while the duty cycle of the second drive signal does not change. In a specific embodiment, both the first drive signal and the second drive signal are PWM signals, and the generated target drive signal is also a PWM signal. In an embodiment, the duty cycle of the second drive signal can be fixedly set to 50%.

[0045] Based on step S3, after obtaining the above target drive signal, the power supply process of the power supply circuit can be controlled by the target drive signal to realize the power supply to the atomization component. In an embodiment, the power supply circuit is a PWM drive circuit, and the output voltage or output power is adjusted by the PWM signal during the working process.

[0046] Through the technical solution of this embodiment, it can be realized that when the input voltage of the power supply circuit corresponding to the atomization component changes, the power supply process of the atomization component is not affected, and then the atomization effect of the atomization component during the working process of the atomization device is ensured, improving the user experience.

[0047] In some alternative embodiments, based on the process of step S2, generating the first drive signal with a variable duty cycle includes: adjusting the duty cycle of the first drive signal according to the input voltage and / or the target power of the atomization component. In some embodiments, the input voltage of the current power supply circuit and the target power of the atomization component can be compared to obtain the duty cycle of the first drive signal according to the comparison result, and then generate the first drive signal with a duty cycle meeting the requirements.

[0048] It can be understood that the atomization component is an ultrasonic atomization component. The target power of the ultrasonic atomization component corresponds to the atomization amount of the ultrasonic atomization component. As the output voltage of the power supply battery decreases, that is, the input voltage corresponding to the atomization component also decreases, the oscillation amplitude of the ultrasonic atomization component decreases, and the ultrasonic atomization amount decreases. The second drive signal with a fixed duty cycle is used as a reference signal, and the duty cycle of the first drive signal is adjusted. That is, the superimposed signal of the first drive signal and the second drive signal is used as the target drive signal to dynamically adjust the number of oscillations of the ultrasonic atomization component per unit time according to the output voltage of the power supply battery, so as to maintain the atomization amount of the ultrasonic atomization component even when the output voltage of the power supply battery decreases.

[0049] During the continuous operation of the power supply circuit, when its input voltage changes continuously, the duty cycle of the corresponding first driving signal also changes. Therefore, during the generation of the first driving signal, it is also necessary to continuously adjust the duty cycle according to the change of the input voltage. The target power of the atomization component can be understood as the power consumption required by the atomization component based on the working state or working mode of the atomization device during the operation of the atomization device. The value of the target power can be obtained by reading the pre-stored set value, or can be calculated by a program set inside the atomization device according to the working state or working mode of the atomization device.

[0050] Further, in some alternative embodiments, adjusting the duty cycle of the first driving signal according to the input voltage and the target power of the atomization component includes: setting the duty cycle of the first driving signal according to the square of the ratio of the input voltage to the target voltage corresponding to the target power of the atomization component.

[0051] In some embodiments, a relationship formula between the duty cycle of the first driving signal, the input voltage, and the target power can be constructed to adjust the duty cycle of the first driving signal according to this relationship formula. It can be understood that when the working state or working mode of the atomization device is set, in this relationship formula, the target power can be understood as a fixed quantity (the target voltage corresponding to the target power is also a fixed quantity), and the input voltage is a variable.

[0052] In some embodiments, the mathematical relationship of this relationship formula can be understood as that the duty cycle of the first driving signal has a mathematical relationship with the square of the ratio of the input voltage to the target voltage corresponding to the target power. In a specific embodiment, it can be expressed by the expression to reflect this relationship, where D1 is the duty cycle of the first driving signal, V is the target voltage corresponding to the target power, and VCC is the input voltage of the power supply circuit.

[0053] In a specific embodiment, the duty cycle obtained by the above expression can be compensated to further optimize the process of obtaining the duty cycle of the first driving signal. For example, the duty cycle of the first driving signal is obtained by the expression where k is a compensation coefficient, which can be preset according to the specific circuit structure of the power supply circuit and can be understood as a constant within a reasonable range.

[0054] In some alternative embodiments, the control method of the present application further includes: configuring the frequency of the second drive signal according to the operating frequency of the atomization component. It can be understood that when the atomization device realizes the atomization function based on ultrasonic waves, the atomization component in the atomization device will perform energy conversion on the input power, converting electrical energy into ultrasonic waves. Among them, the frequency of the ultrasonic waves generated by the atomization component is determined by the operating frequency of the atomization component, that is, it can be understood that it is determined by the circuit parameters of the atomization component and its corresponding resonance circuit, and can be understood as a fixed value. When the frequency of the ultrasonic waves that the atomization component needs to generate is a fixed frequency, when generating the second drive signal in the above step S2, the frequency of the second drive signal can be set according to this fixed frequency.

[0055] In a specific embodiment, the frequency of the second drive signal can be directly set to be the same as the frequency of the ultrasonic waves that the atomization component needs to generate. For example, when the frequency of the ultrasonic waves that the atomization component needs to generate is 20KHz, the frequency of the second drive signal can be set to 20KHz.

[0056] In some embodiments, a relationship between the frequency of the second drive signal and the frequency of the ultrasonic waves that the atomization component needs to generate can also be constructed, and the frequency of the second drive signal can be obtained according to the specific relationship. Among them, the specific relationship may vary based on different atomization devices.

[0057] In some alternative embodiments, as Figure 2 and Figure 3 shown, based on step S2, a target drive signal is output according to the first drive signal and the second drive signal; including: S21. When the first drive signal is at a high level, the second drive signal is used as the target drive signal; S22. When the first drive level is at a low level, the first drive signal is used as the target drive signal. That is, in the process of processing the first drive signal and the second drive signal to obtain the target drive signal, it is necessary to respectively obtain the level information of the first drive signal and the second drive signal in the same time period, and process according to the level information to obtain the level of the target drive signal corresponding to this time period.

[0058] As Figure 3 shown, in a time period, for example, in the t1 time period in the figure, the first drive signal (corresponding to PWM1 in the figure) is at a high level, and the second drive signal (corresponding to PWM2 in the figure) is at a high level, then the target drive signal (corresponding to PWM3 in the figure) is at a high level. In a time period, for example, in the t2 time period in the figure, the first drive signal is at a high level, and the second drive signal is at a low level, then the target drive signal is at a low level, that is, the target drive signal at this time is related to the second drive signal. In a time period, for example, in the t3 time period and the t4 time period in the figure, the first drive signal is at a low level. At this time, regardless of whether the second drive signal is at a high level or a low level, the target drive signal is at a low level, that is, the target drive signal at this time is determined by the first drive signal.

[0059] As shown Figure 4 in the figure, the power supply circuit 100 provided in this embodiment is shown. The power supply circuit 100 is used to supply power to the atomization component. As shown Figure 4 in the figure, the power supply circuit 100 provided in this embodiment includes: a boost unit 110, the boost unit 110 is connected to the input voltage and is used to provide a power supply output according to the input voltage so as to supply power to the atomization component through the power supply output; a controller 130, the controller 130 is configured to generate a first driving signal with a variable duty cycle and a second driving signal with a non-variable duty cycle respectively, and output a target driving signal according to the first driving signal and the second driving signal; a driving switch 120, the driving switch 120 is connected to the controller 130 and is used to receive the target driving signal to adjust the conduction time; wherein, the boost unit 110 is electrically connected to the driving switch 120, and the boost unit 110 adjusts the power supply output according to the conduction time of the driving switch 120.

[0060] In the power supply circuit 100 of this embodiment, the input end of the boost unit 110 is the power input end of the power supply circuit 100, which is used to connect the power supply of the atomization device such as a power supply battery to obtain the input voltage. When the boost unit 110 is working, it will perform voltage conversion based on the input voltage and obtain the corresponding output voltage to provide atomization power for the atomization component through the output voltage. In a specific embodiment, the output end of the boost unit 110 is used as the voltage output end of the power supply circuit 100 and is respectively connected to the atomization component.

[0061] In this embodiment, the working process of the boost unit 110 can be controlled by the driving switch 120. When the boost unit 110 is working, its corresponding power supply output can be adjusted according to the conduction or turn-off time of the driving switch 120. More specifically, the output voltage of the boost unit 110 is controlled by the conduction duration of the driving switch 120, and then the purpose of adjusting the atomization power of the atomization component in the atomization device is achieved. And the working process of the driving switch 120 is controlled by the controller 130. The controller 130 generates a target driving signal and controls the conduction or turn-off of the driving switch 120 through the target driving signal. Among them, the process of the controller 130 generating the target driving signal is to generate a first driving signal with a variable duty cycle and a second driving signal with a non-variable duty cycle respectively, and calculate the first driving signal and the second driving signal to obtain the target driving signal. In a specific embodiment, both the first driving signal and the second driving signal are PWM signals, and the obtained target driving signal is also a PWM signal. In an embodiment, the duty cycle of the second driving signal can be fixedly set to 50%.

[0062] In some alternative embodiments, the controller 130 is configured to obtain the input voltage and / or the target power of the atomization component, and adjust the duty cycle of the first driving signal according to the input voltage and / or the target power of the atomization component. That is, the controller 130 may first obtain the input voltage of the boosting unit 110 and the target power when the atomization component is operating, and compare the current input voltage of the boosting unit 110 with the target power of the atomization component, so as to obtain the duty cycle of the first driving signal according to the comparison result, and then generate the first driving signal with a duty cycle meeting the requirements. It can be understood that the process of the controller 130 obtaining the input voltage is carried out in real time. In one embodiment, when the operation of the atomization device is powered by its power supply battery, the boosting unit 110 can also be understood as providing a power supply input through the power supply battery, and the process of obtaining the input voltage of the boosting unit 110 can be understood as obtaining the output voltage of the power supply battery. Among them, the specific process of obtaining the output voltage of the power supply battery may include: sampling through a corresponding sampling circuit, and performing signal processing on the sampling result to obtain the final voltage value. The sampling circuit may be provided at the output end of the power supply battery or at the input end of the boosting unit 110. In a specific embodiment, this process is implemented by combining hardware and software, and the controller 130 is used to implement the software part thereof.

[0063] The process of the controller 130 obtaining the target power of the atomization component can be understood as that during the operation of the atomization device, the controller 130 obtains the power consumption required by the atomization device based on the operating state or operating mode of the atomization device. The value of the target power can be obtained by the controller 130 reading the pre-stored set value, or can be calculated by the controller 130 executing the program set inside the atomization device according to the operating state or operating mode of the atomization device.

[0064] In some alternative embodiments, the controller 130 is configured to set the duty cycle of the first driving signal according to the square of the ratio of the input voltage to the target voltage corresponding to the target power of the atomization component. In some embodiments, a relationship formula between the duty cycle of the first driving signal and the input voltage and the target voltage corresponding to the target power can be constructed, and the controller 130 adjusts the duty cycle of the first driving signal according to this relationship formula. It can be understood that when the operating state or operating mode of the atomization device is set, in this relationship formula, the target power can be understood as a fixed quantity (the target voltage corresponding to the target power is also a fixed quantity), and the input voltage is a variable. In some embodiments, the mathematical relationship of this relationship formula can be understood as that the duty cycle of the first driving signal has a mathematical relationship with the square of the ratio of the input voltage to the target voltage corresponding to the target power. In a specific embodiment, it can be through the expression To embody this relationship, where D1 is the duty cycle of the first driving signal, V is the corresponding target voltage, and VCC is the input voltage of the power supply circuit 100. In a specific embodiment, the controller 130 can compensate the duty cycle obtained from the above expression to further optimize the process of obtaining the duty cycle of the first driving signal. For example, through the expression obtain the duty cycle of the first driving signal, where k is a compensation coefficient, which can be preset according to the specific circuit structure of the power supply circuit 100 and can be understood as a constant within a reasonable range.

[0065] In some alternative embodiments, the controller 130 is further configured to obtain the operating frequency of the atomizing component and configure the frequency of the second driving signal according to the operating frequency of the atomizing component. It can be understood that when the atomizing device realizes the atomizing function based on ultrasonic waves, the atomizing component in the atomizing device will perform energy conversion on the input power and convert electrical energy into ultrasonic waves. Among them, the frequency of the ultrasonic waves generated by the atomizing component is determined by the operating frequency of the atomizing component, that is, it can be understood as being determined by the circuit parameters of the atomizing component and its corresponding resonant circuit, and can be understood as a fixed value. When the frequency of the ultrasonic waves that the atomizing component needs to generate is a fixed frequency, the controller 130 can set the frequency of the second driving signal according to this fixed frequency. In a specific embodiment, when generating the second driving signal, the controller 130 can directly set the frequency of the second driving signal to be the same as the frequency of the ultrasonic waves that the atomizing component needs to generate. For example, when the frequency of the ultrasonic waves that the atomizing component needs to generate is 20KHz, the frequency of the second driving signal can be set to 20KHz. In some embodiments, a relationship between the frequency of the second driving signal and the frequency of the ultrasonic waves that the atomizing component needs to generate can also be constructed, and the controller 130 obtains the frequency of the second driving signal according to the specific relationship and then generates the corresponding second driving signal. The specific relationship may vary based on different atomizing devices.

[0066] In some alternative embodiments, the controller 130 is further configured to: when the first driving signal is at a high level, use the second driving signal as the target driving signal; when the first driving level is at a low level, use the first driving signal as the target driving signal. That is, when the controller 130 processes the first driving signal and the second driving signal to obtain the target driving signal, it is necessary to respectively obtain the level information of the first driving signal and the second driving signal in the same time period, and process according to the level information to obtain the level of the target driving signal in this time period. Such as Figure 3As shown, during a period, for example, the period t1 in the figure, when the first driving signal (corresponding to PWM1 in the figure) is at a high level and the second driving signal (corresponding to PWM2 in the figure) is at a high level, the target driving signal (corresponding to PWM3 in the figure) is at a high level. During a period, for example, the period t2 in the figure, when the first driving signal is at a high level and the second driving signal is at a low level, the target driving signal is at a low level, that is, the target driving signal at this time is related to the second driving signal. During a period, for example, the periods t3 and t4 in the figure, when the first driving signal is at a low level, regardless of whether the second driving signal is at a high level or a low level, the target driving signal is at a low level, that is, the target driving signal at this time is determined by the first driving signal.

[0067] In some alternative embodiments, the boost unit 110 includes a boost inductor. The first end of the boost inductor is connected to the positive electrode of the power supply battery, the second end of the boost inductor is connected to the first end of the atomization component, and the third end of the boost inductor is connected to the second end of the atomization component. In a specific embodiment, as Figure 4 shown, the boost unit 110 includes a boost inductor L1. When the boost unit 110 operates, voltage conversion is performed through the boost inductor L1. The first end of the boost inductor L1 serves as the input end of the boost unit 110 and is used to connect to the positive electrode of the power supply battery to provide an input voltage through the power supply battery. This power supply battery can be understood as the power supply battery inside the atomization device. The second end and the third end of the boost inductor L1 serve as the output ends of the boost unit 110 and are used to connect to the atomization component to supply power to the atomization component. In an embodiment, when the atomization component is an atomization sheet, the second end of the boost inductor L1 is connected to the H- pole of the atomization sheet, and the third end of the boost inductor L1 is connected to the H+ pole of the atomization sheet (where the atomization sheet is not shown in the figure).

[0068] In some alternative embodiments, the drive switch 120 includes a drive resistor and a MOS transistor; the first end of the drive resistor is configured to receive the target drive signal, the second end of the drive resistor is connected to the control end of the MOS transistor, the first end of the MOS transistor is connected to the boost unit 110, and the second end of the MOS transistor is grounded. In a specific embodiment, the drive resistor includes a resistor R1, and the MOS transistor is an N-type MOS transistor Q1. The gate of the MOS transistor Q1 receives the target drive signal output by the controller 130 through the resistor R1 to conduct or cut off according to the target drive signal. Taking the target drive signal as a PWM signal for illustration, when the PWM signal input through the resistor R1 is at a high level, the MOS transistor Q1 conducts, and the boost inductor L1 stores energy and magnetizes according to the input voltage. When the PWM signal input through the resistor R1 is at a low level, the MOS transistor Q1 turns off. At this time, the atomization sheet (H+ is one pole of the atomization sheet and H- is the other pole of the atomization sheet, and the atomization sheet is equivalent to a capacitor when resonating) and the boost inductor L1 form a resonant circuit to resonate at a certain resonant frequency to drive the atomization sheet to vibrate.

[0069] AsFigure 5 As shown, in an ultrasonic atomization device provided by the present application, it includes an atomization component 200 and the power supply circuit 100 as described above. That is, in this ultrasonic atomization device, the atomization component 200 is powered by the above-mentioned power supply circuit 100 to achieve the atomization power control process during the operation of the ultrasonic atomization device, especially when the supply voltage of the atomization device changes, thereby improving the user experience. In one embodiment, the power supply circuit 100 can be powered by a power supply battery 300 inside the atomization device.

[0070] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the description is relatively specific and detailed, but it cannot be construed as a limitation on the scope of the invention patent; it should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can also be made, which all belong to the protection scope of the present invention; therefore, all equivalent transformations and modifications made to the scope of the claims of the present invention shall fall within the scope covered by the claims of the present invention.

Claims

1. A control method, characterized in that, A power supply circuit for controlling an atomization component, the method comprising: Obtaining an input voltage of the power supply circuit; Generating a first drive signal with a variable duty cycle and a second drive signal with a non-variable duty cycle according to the input voltage, and outputting a target drive signal according to the first drive signal and the second drive signal; Controlling the power supply output of the power supply circuit according to the target drive signal to supply power to the atomization component through the power supply output.

2. The control method according to claim 1, wherein The generating the first drive signal with a variable duty cycle includes: Adjusting the duty cycle of the first drive signal according to the input voltage.

3. The control method according to claim 2, wherein The generating the first drive signal with a variable duty cycle further includes: Adjusting the duty cycle of the first drive signal according to the target power of the atomization component.

4. The control method according to claim 1, characterized in that The method further includes: Configuring the frequency of the second drive signal according to the operating frequency of the atomization component.

5. The control method according to claim 1, characterized in that The outputting the target drive signal according to the first drive signal and the second drive signal includes: When the first drive signal is at a high level, using the second drive signal as the target drive signal; When the first drive level is at a low level, using the first drive signal as the target drive signal.

6. A power supply circuit, characterized in that, Applied to an atomization component, the power supply circuit includes: A boost unit, the boost unit is connected to an input voltage, and is configured to provide a power supply output according to the input voltage to supply power to the atomization component through the power supply output; A controller, the controller is configured to generate a first drive signal with a variable duty cycle and a second drive signal with a non-variable duty cycle respectively, and output a target drive signal according to the first drive signal and the second drive signal; A drive switch, the drive switch is connected to the controller and is configured to receive the target drive signal to adjust the conduction time; Wherein, the boost unit is electrically connected to the drive switch, and the boost unit adjusts the power supply output according to the conduction time of the drive switch.

7. The power supply circuit according to claim 6, characterized in that, The controller is configured to obtain the input voltage and / or the target power of the atomization component, and adjust the duty cycle of the first drive signal according to the input voltage and / or the target power of the atomization component.

8. The power supply circuit according to claim 7, wherein The controller is configured to set the duty cycle of the first drive signal according to the square of the ratio of the input voltage to the target voltage corresponding to the target power of the atomization component.

9. The power supply circuit according to claim 6, wherein The controller is further configured to obtain the operating frequency of the atomization component and configure the frequency of the second drive signal according to the operating frequency of the atomization component.

10. The power supply circuit according to claim 6, wherein The controller is further configured to When the first drive signal is at a high level, using the second drive signal as the target drive signal; When the first drive level is at a low level, using the first drive signal as the target drive signal.

11. The power supply circuit according to claim 6, wherein The boost unit includes a boost inductor, a first end of the boost inductor is connected to the positive pole of a power supply battery, a second end of the boost inductor is connected to a first end of the atomization component, and a third end of the boost inductor is connected to a second end of the atomization component; and / or, The driving switch includes a driving resistor and a MOS transistor; a first end of the driving resistor is configured to receive the target driving signal, a second end of the driving resistor is connected to a control end of the MOS transistor, a first end of the MOS transistor is connected to the boost unit, and a second end of the MOS transistor is grounded.

12. An ultrasonic atomization device, characterized in that, It includes an atomization component and a power supply circuit as described in any one of claims 6 to 11.

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