CN119014614A

CN119014614A - Electronic atomization device and control method

Info

Publication number: CN119014614A
Application number: CN202310605151.9A
Authority: CN
Inventors: 黄林建; 徐中立; 李永海
Original assignee: Shenzhen FirstUnion Technology Co Ltd
Current assignee: Shenzhen FirstUnion Technology Co Ltd
Priority date: 2023-05-25
Filing date: 2023-05-25
Publication date: 2024-11-26
Also published as: WO2024240178A1

Abstract

The present application proposes an electronic atomization device and a control method; wherein the electronic atomization device includes: a receptor, which is used to heat an aerosol-generating matrix to generate an aerosol; an LC oscillator, which includes an induction coil and a capacitor; the LC oscillator is configured to guide a changing current to flow through the induction coil, thereby driving the induction coil to provide energy to the receptor so that the receptor heats the aerosol-generating matrix; a controller, which is configured to drive the LC oscillator with an intermittent PWM signal to form a current flowing through the induction coil, and control the pulse density of the PWM signal within a predetermined time so that the energy value provided to the receptor remains at a preset energy value. The above electronic atomization device controls the pulse density of the PWM signal during the user's puffing time so that the energy value provided to the receptor remains at a preset energy value, thereby maintaining a stable aerosol generation or puffing taste during the puffing time.

Description

Electronic atomizing device and control method

Technical Field

The embodiment of the application relates to the technical field of electronic atomization, in particular to an electronic atomization device and a control method.

Background

Smoking articles (e.g., cigarettes, cigars, etc.) burn tobacco during use to produce tobacco smoke. Attempts have been made to replace these tobacco-burning products by making products that release the compounds without burning.

An example of such a product is a heating device that releases a compound by heating rather than burning a material. For example, the material may be tobacco or other non-tobacco products that may or may not contain nicotine. As another example, there are aerosol provision articles, for example, so-called electronic atomizing devices. These devices typically contain a liquid that is heated to vaporize it, producing an inhalable aerosol. In the known electronic atomization device, the suction action of a user is sensed by an airflow sensor, and when the airflow sensor senses the suction of the user, the induction coil is controlled to generate a changed magnetic field to induce the susceptor to generate heat so as to heat the liquid to generate aerosol; in the conventional electronic atomizing device, the generation of the varying magnetic field by the induction coil is performed in response to a trigger signal of the air flow sensor. Further, when the electronic atomizing device adopts the symmetrical LC oscillating circuit inversion with fixed resonance frequency to enable the induction coil to generate a variable magnetic field, the resonance frequency of the LC oscillating circuit and 50% duty ratio of the PWM control signal are set to be constant and non-adjustable, and the temperature of the susceptor is in a continuously rising form in fig. 1 in the period of suction, so that overheating is easy to generate or the taste is easy to be affected.

Disclosure of Invention

One embodiment of the present application provides an electronic atomizing device including:

a susceptor for heating an aerosol-generating substrate to produce an aerosol;

an LC oscillator including an induction coil and a capacitor; the LC oscillator is configured to direct a varying current through the induction coil, thereby driving the induction coil to energize the susceptor to heat the aerosol-generating substrate;

And a controller configured to drive the LC oscillator with an intermittent PWM signal to form a current flowing through the induction coil, and to control a pulse density of the PWM signal for a predetermined time so that an energy value supplied to the susceptor for the predetermined time is maintained at a preset energy value.

The above "pulse density" is an electrical term that refers to the number of pulses of a signal per unit time, or the ratio of the number of pulses of a signal to time.

In some embodiments, the above predetermined time may be a program execution period set by the MCU controller, for example, 300ms or 500ms or 1s, etc.; or the above predetermined time may be the time of the entire heating process, for example, 3s/4s, etc.

In some embodiments, further comprising:

An airflow sensor for sensing a pumping action of a user;

The controller is configured to drive the LC oscillator with the PWM signal to form a current through the induction coil for the duration of the user's pumping action.

In some embodiments, the LC oscillator has a resonant frequency; the frequency of the PWM signal is the same as the resonant frequency of the LC oscillator. Or the frequency of the PWM signal is constant for the duration of the user's pumping action.

The frequency of the PWM signal above is an electrical term, referring to the derivative of the period of the PWM pulse signal.

In some embodiments, or for the duration of the user's pumping action, the duty cycle of the PWM signal is constant; specifically, the duty ratio of the PWM signal is fixedly set to 50%.

In some embodiments, the predetermined time includes at least a first predetermined time and a second predetermined time of sequential advancement during the duration of a single pumping action by the user; the pulse density of the PWM signal during the second predetermined time is less than the pulse density during the first predetermined time. Or the duration of a single pumping action of the user is divided to include a plurality of said predetermined times; and, a pulse density of the PWM signal is reduced for the predetermined time along with a progression of a duration of a single pumping action by the user.

In some embodiments, further comprising:

a voltage stabilizer for generating a constant voltage;

The controller is configured to control the supply of the constant voltage to the LC oscillator with the PWM signal, thereby driving the LC oscillator to form a current flowing through the induction coil.

In some embodiments, the controller is configured to calculate the amount of energy provided to the susceptor based on the length of time the constant voltage is provided to the LC oscillator.

In some embodiments, further comprising:

the battery cell is used for supplying power;

a first switching tube and a second switching tube;

the capacitor comprises a first capacitor and a second capacitor;

The first end of the first capacitor is connected with the positive electrode of the battery cell, and the second end of the first capacitor is connected with the first end of the second capacitor; the second end of the second capacitor is connected with the negative electrode of the battery cell; the first end of the induction coil is connected with the second end of the first capacitor, and the second end of the induction coil is connected with the positive electrode of the battery cell through the first switch tube and the negative electrode of the battery cell through the second switch tube;

The controller is configured to control the first switching tube with a first PWM signal and to control the second switching tube to alternately turn on and off with a second PWM signal, thereby causing the LC oscillator to direct a varying current through the induction coil.

Yet another embodiment of the present application also provides an electronic atomizing device, including:

a susceptor for heating a liquid aerosol-generating substrate to produce an aerosol;

An LC oscillator including an induction coil and a capacitor; the LC oscillator is configured to direct a varying current through the induction coil, thereby driving the induction coil to induce the susceptor to heat a liquid aerosol-generating substrate;

An airflow sensor for sensing a pumping action of a user;

A controller configured to drive the LC oscillator with an intermittent PWM signal to form a current flowing through the induction coil for the duration of the user's pumping action and to control the pulse density of the PWM signal to cause the heating temperature of the susceptor to be substantially constant.

Still another embodiment of the present application also proposes a control method of an electronic atomizing apparatus, including:

a susceptor for heating an aerosol-generating substrate to produce an aerosol;

The method comprises the following steps:

The LC oscillator is driven with an intermittent PWM signal to form a current flowing through the induction coil, and the pulse density of the PWM signal is controlled for a predetermined time to maintain the energy value supplied to the susceptor for the predetermined time at a preset energy value.

The above electronic atomizing device keeps the energy value supplied to the susceptor at a preset energy value by controlling the pulse density of the PWM signal during the period of time of the user's suction, and keeps the aerosol generation or the suction taste stable during the period of time of the suction.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

FIG. 1 is a graph of the temperature change of a susceptor as it heats in response to the triggering of an air flow sensor to produce a magnetic field to induce heating of the susceptor;

FIG. 2 is a schematic diagram of an electronic atomizing device according to one embodiment;

FIG. 3 is a schematic diagram of one embodiment of the circuit of FIG. 2;

FIG. 4 is a schematic diagram of the basic components of one embodiment of the circuit of FIG. 3;

FIG. 5 is a schematic diagram of PWM control signals sent by the MCU controller in one embodiment;

FIG. 6 is a graph of temperature change of a susceptor in one embodiment;

fig. 7 is a schematic diagram of the basic components of the circuit in yet another embodiment.

Detailed Description

In order that the application may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

One embodiment of the present application provides an electronic atomizing device for atomizing an aerosol-forming substrate to generate an aerosol. In some embodiments, the electronic atomizing device may comprise two or more parts that are separated or replaced from each other, which when combined form a complete combined use state of the electronic atomizing device, and which can be operated by a corresponding user to generate an aerosol.

In some embodiments, the electronic atomizing device is capable of generating an aerosol by heating a liquid aerosol-forming substrate; in some embodiments, the liquid aerosol-forming substrate comprises at least one of propylene glycol, glycerin, and the like.

Or in still other embodiments, the electronic atomizing device is capable of forming an aerosol for inhalation by heating a solid aerosol-forming substrate, volatilizing or releasing at least one component of the solid aerosol-forming substrate. In some implementations, the solid aerosol-forming substrate is preferably a solid substrate, which may comprise one or more of a powder, granules, chip strands, ribbons or flakes of one or more of vanilla leaves, dried flowers, volatile flavored herbal crops, tobacco leaves, reconstituted tobacco, expanded tobacco; or the solid substrate may contain additional volatile flavour compounds, whether tobacco or not, to be released when the substrate is heated.

Fig. 2 shows a schematic view of an electronic atomizing device of an embodiment in which the electronic atomizing device includes: a nebulizer 100 for nebulizing a liquid aerosol-forming substrate to generate an aerosol, and a power supply mechanism 200 for supplying power to the nebulizer.

Further according to fig. 2, the power supply mechanism 200 includes:

Proximal 2110 and distal 2120 facing away in the longitudinal direction; in use, proximal end 2110 is an end for receiving nebulizer 100.

As shown in fig. 2, the power supply mechanism 200 further includes:

The receiving cavity 270 is disposed adjacent the proximal end 2110 and is disposed along the longitudinal extension of the power mechanism 200; and, the receiving cavity 270 has an opening in the longitudinal direction toward or at the proximal end 2110; in use, the atomizer 100 can be received within the receiving cavity 270 through an opening or removed from the receiving cavity 270.

As shown in fig. 2, the power supply mechanism 200 further includes:

a rechargeable battery cell 210 for outputting electric power; and, the cell 210 is disposed proximate the distal end 2120;

A charging interface 240 for charging the rechargeable battery cell 210; and, charging interface 240 is disposed between battery cell 210 and distal end 2120.

In one embodiment, the DC supply voltage provided by the battery 210 is in the range of about 2.5V to about 9.0V, and the amperage of the DC current that the battery 210 can provide is in the range of about 2.5A to about 20A. In one specific embodiment, the DC power supply voltage provided by the battery cell 210 is 3.2V-4.2V.

As shown in fig. 2, the power supply mechanism 200 further includes:

the circuit 220 is integrated or arranged on a circuit board, such as a PCB board, for controlling the operation of the power supply mechanism 200, in particular the circuit 220 controlling the power output by the battery cell 210. And in fig. 2, the circuit 220 is located between the cell 210 and the receiving cavity 270.

As shown in fig. 2, the power supply mechanism 200 further includes:

An airflow sensor 250, such as a microphone/MEMS sensor or the like, for sensing the flow of suction through the nebulizer 100 when a user sucks on the nebulizer 100; and the circuit 220 further controls the battery cell 210 to output power according to the sensing result of the airflow sensor 250. In the embodiment shown in fig. 2, the airflow sensor 250 is arranged to be located between the cell 210 and the receiving cavity 270. And in still other variations, the airflow sensor 250 may also be mounted or fastened or bonded to a circuit board on which the circuitry 220 is disposed. Or in still other variations, the airflow sensor 250 is supported and secured within the power mechanism 200 by a separate support element, such as a plastic bracket or the like.

In some embodiments, the power mechanism 200 is configured to induce the atomizer 100 to heat the atomized liquid aerosol-forming substrate by generating a varying magnetic field through the receiving cavity 270; in particular, an inductive heating element may be disposed in the atomizer 100 that is penetrable by a varying magnetic field to heat a liquid aerosol-forming substrate to generate an aerosol when the atomizer 100 is received within the receiving cavity 270.

As shown in fig. 2, the power supply mechanism 200 further includes:

an induction coil 260 disposed around the receiving cavity 270;

the circuit 220 generates an alternating current through the induction coil 260 by driving it at a predetermined frequency, thereby causing the induction coil 260 to generate a varying magnetic field capable of penetrating the receiving cavity 270. In some embodiments, the frequency of the alternating current supplied by circuit 220 to induction coil 260 is between 80KHz and 2000KHz; more specifically, the frequency may be in the range of about 600KHz to 1500 KHz.

And in some embodiments, the induction coil 260 is wound from a low resistivity wire material; such as copper wire, silver wire, etc. And in yet other embodiments, the induction coil 260 is wound from litz wire; litz wire pairs with multiple strands or bundles of wire filaments are more advantageous for carrying alternating currents.

Fig. 2 shows a schematic view of an embodiment of the atomizer 100, the embodiment of the atomizer 100 comprising:

a main housing 10;

A partition wall 11 extending in the longitudinal direction of the atomizer 100 within the main housing 10; and, the partition wall 11 is integrally molded with the main casing 10, for example, molded from a polymer, ceramic, or the like; and, the partition wall 11 extends to or terminates at the air outlet 111. And, a liquid storage chamber 12 is defined between the partition wall 11 and the main housing 10 for storing the liquid aerosol-forming substrate. And, an aerosol output passage located within the main casing 10 is surrounded and defined by the partition wall 11 for outputting the aerosol to the air outlet 111 in suction.

The atomizer 100 further includes:

An atomizing assembly for atomizing a liquid aerosol-forming substrate to generate an aerosol; in fig. 2, the atomizing assembly comprises a liquid guiding element 20 for sucking and storing a liquid aerosol-forming substrate, and a susceptor 30 coupled to the liquid guiding element 20 for heating the liquid aerosol-forming substrate to generate an aerosol.

In the embodiment shown in fig. 2, the liquid guiding element 20 is configured to be located within the partition wall 11; and, the liquid guiding member 20 is configured to be a hollow cylinder extending in the longitudinal direction. In some embodiments, the liquid transfer element 20 is made of a capillary material or a porous material, such as a sponge, cotton fiber, or a porous body such as a porous ceramic body, or the like. The outer side surface of the liquid guide element 20 is configured as a wicking surface for drawing liquid aerosol-forming substrate from within the liquid storage chamber 12; in some specific embodiments, the partition wall 11 is provided with a plurality of perforations, and the outer surface of the liquid guiding element 20 sucks the liquid aerosol-forming substrate in the liquid storage chamber 12 through the perforations. The inner side surface of the liquid guiding element 20 is configured as an atomizing surface; the susceptor 30 is bonded to the inner side surface of the liquid guiding element 20 and heats at least part of the liquid aerosol-forming substrate within the liquid guiding element 20 to generate an aerosol.

In still other embodiments, the liquid directing element 20 may also be configured in a variety of regular or irregular shapes and be in partial fluid communication with the liquid storage chamber 12 to receive a liquid aerosol-forming substrate. Or in other variant embodiments, the liquid guiding element 20 may have a more regular or irregular shape, such as a polygonal block, a groove-like shape with grooves on the surface, or an arch-like shape with hollow channels inside, etc.

Or in yet other variations, the susceptor 30 may be bonded to the liquid guiding member 20 by printing, deposition, sintering, or physical assembly. In some other variations, the liquid-directing component 20 may have a planar or curved surface for supporting the susceptor 30, with the susceptor 30 being formed on the planar or curved surface of the liquid-directing component 20 of the porous body by means of mounting, printing, deposition, or the like.

In the embodiment shown in fig. 2, susceptor 30 is an inductive heating element that is penetrable by a varying magnetic field to generate heat. Susceptor 30 is made of a receptive metal or alloy, for example susceptor 30 may be made of grade 430 stainless steel (SS 430), grade 420 stainless steel (SS 420), and an alloy material containing iron and nickel (such as permalloy). And in some specific embodiments, susceptor 30 has a length of 2mm to 10mm; and, susceptor 30 has an inner diameter of 1.5mm to 8 mm; and the susceptor 30 has a wall thickness of 0.05mm to 0.2mm. For example, in some specific embodiments, susceptor 30 has a length of 4mm to 8 mm. According to fig. 2, the susceptor 30 is in a tubular shape closed in the circumferential direction; and, the susceptor 30 is a mesh structure, the susceptor 30 having a plurality of perforations arranged in an array for releasing aerosols.

Or in still other variations, the susceptor 30 may be configured to be solenoid-shaped, or more cylindrically shaped.

In the embodiment shown in fig. 2, the induction coil 260 has an extension length of 6 to 15mm; and, the induction coil 260 has about 6 to 12 turns; the length of susceptor 30 is less than the length of induction coil 260; the susceptor 30 is substantially entirely within the induction coil 260 when the atomizer 100 is received within the receiving cavity 270.

Fig. 3 shows a schematic diagram of the structure of the circuit 220 of an embodiment in which the circuit 220 comprises:

an MCU controller 221;

LC oscillator 222 consisting of an induction coil 260 and a capacitor; in some embodiments, LC oscillator 222 may be an asymmetric LC oscillator 222 with only one oscillating leg, consisting of one capacitor and inductive coil 260; or in still other embodiments LC oscillator 222 is a symmetrical LC oscillator 222 comprising two symmetrical oscillating legs consisting of two capacitors and an inductive coil 260;

Half-bridge 224 (electrical domain basic terminology), comprising two switching tubes, is located between cell 210 and LC oscillator 222;

In use, when the air flow sensor 250 senses a user's suction, the MCU controller 221 controls the on/off of the switching tubes in the half bridge 224 in accordance with the sensing of the air flow sensor 250, thereby oscillating the LC oscillator 222, thereby forming an alternating current through the induction coil 260 and thereby generating a magnetic field to induce heating of the susceptor 30.

FIG. 4 shows a schematic diagram of the basic components of a specific embodiment of the circuit 220 of FIG. 3; as shown in fig. 4, the circuit 220 includes:

A symmetrical LC oscillator 222 comprising a sense coil 260 and a capacitor C1 and a capacitor C2; and, the capacitor C1 and the capacitor C2 form symmetrical bridge arms with the induction coil 260, respectively;

A half bridge 224 including a switching tube Q1 and a switching tube Q2; specifically, in this embodiment, the half-bridge 224 is connected to the symmetrical LC oscillator 222 in the following manner:

The first end of the capacitor C1 is connected with the positive electrode of the battery cell 210, and the second end of the capacitor C1 is connected with the first end of the capacitor C2; the second end of the capacitor C2 is connected with the negative electrode of the battery cell 210; the first end of the induction coil 260 is connected to the second end of the capacitor C1, and the second end is connected to the positive electrode of the battery cell 210 through the switching tube Q1 and to the negative electrode of the battery cell 210 through the switching tube Q2.

The switching tube Q1 is turned on and off by a first PWM control signal sent by the MCU controller 221, and the switching tube Q2 is turned on and off by a second PWM control signal sent by the MCU controller 221.

In some embodiments, for such electronic atomizing devices that require the fastest aerosol generation in response to a user's pumping action, the frequency of the PWM control signal is typically matched to the natural resonant frequency of the symmetrical LC oscillator 222, such that the LC oscillator 222 oscillates substantially at maximum resonance efficiency, producing the fastest aerosol. In an embodiment, the frequency of the PWM control signal issued by the mcu controller 221 is constant for such a symmetrical LC oscillator 222; to prevent the LC oscillator 222 from failing to resonate when the frequency of the PWM control signal is not coincident with the natural resonant frequency of the LC oscillator 222, thereby failing to provide an aerosol.

In some embodiments, in the control of the half-bridge inversion, the switching tube Q1 and the switching tube Q2 are alternately turned on and off; the first PWM control signal transmitted to the switching transistor Q1 and the second PWM control signal transmitted to the switching transistor Q2 by the MCU controller 221 generally have complementary duty ratios. Further, for such a symmetrical LC oscillator 222, the oscillation process (typically including a positive process and a negative process) is symmetrically performed in the oscillation control process due to the need; the duty ratio of the PWM control signal transmitted to the switching transistor Q1 and the PWM control signal transmitted to the switching transistor Q2 by the MCU controller 221 is fixedly set to 50% and is substantially constant.

For example, fig. 5 shows a schematic diagram of a first PWM control signal sent by the MCU controller 221 to control the switching transistor Q1 to be turned on and off and a second PWM control signal sent by the switching transistor Q2 to be turned on and off in one embodiment.

In the illustration of fig. 5, the first PWM control signal and the second PWM control signal are both pulsed square waves. The high/low level in the first PWM control signal is opposite to the high/low level of the second PWM control signal. And, the first PWM control signal and the second PWM control signal are simultaneous. And the duty ratio of the first PWM control signal and the duty ratio of the second PWM control signal are the same, both being 50%. And the periods of the first PWM control signal and the second PWM control signal are the same and are T1. And the frequencies of the first PWM control signal and the second PWM control signal are also the same.

In some embodiments, when the airflow sensor 250 senses a pumping action by a user to trigger, the MCU controller 221 controls to emit the first PWM control signal and the second PWM control signal according to the trigger signal of the airflow sensor 250.

In the embodiment of fig. 5, the MCU controller 221 controls the pulse density (the ratio of the number of pulses to time, i.e., the ratio of the number of pulses to the pumping duration t100 in this embodiment) of the first PWM control signal and the second PWM control signal in accordance with the PDM (pulse density modulation) modulation scheme within the pumping duration t100 of the user sensed by the air flow sensor 250; and, the pulse densities of the first PWM control signal and the second PWM control signal are modulated by the MCU controller 221 in a PDM modulation mode based on a preset energy value required to be supplied to the susceptor 30.

For example, in some specific embodiments, the preset energy value provided to susceptor 30 set in MCU controller 221 is 35J/3s. I.e. the energy required to be supplied to the susceptor 30 is 35J for control signal output, according to the usual user's suction duration t100 of 3s.

Or in still other descriptions, the MCU controller 221 modulates the pulse density of the PWM control signal in accordance with a preset energy value provided to the susceptor 30 per unit time. Wherein the energy provided to susceptor 30 per unit time is 35J/3s = 11.66667J/s.

In this embodiment, the pulse density modulation of the first PWM control signal and the second PWM control signal is based on a preset energy value provided to susceptor 30 when both the duty cycle and the frequency of the PWM control signal need to be maintained constant, in order to make the energy provided to susceptor 30 substantially uniform during the suction period t 100. When the energy supplied to susceptor 30 is substantially uniform, the temperature profile of susceptor 30, which is heated by the eddy current effect, takes the form shown in fig. 6; in fig. 6, the temperature of susceptor 30 is maintained substantially constant near temperature T0 to generate an aerosol after the temperature of susceptor 30 is instantaneously increased from room temperature to temperature T0 due to the temperature sensitivity of eddy current heating. So that the aerosol generation efficiency is substantially uniform at a substantially constant temperature over a single puff length or single heating cycle, thereby providing a better mouthfeel than the prior art progressively higher temperatures of fig. 1.

In the embodiment shown in fig. 5, the MCU controller 221 modulates the interval time between the PWM control signals by the PDM modulation method to vary the pulse density of the PWM control signals. For example, specifically, the interval period between adjacent PWM control signals, such as interval period t11 and interval period t21 shown in fig. 5, and the like are modulated by the PDM, thereby changing the pulse density of the PWM control signals.

In some embodiments, the pulse density of the PWM control signal is substantially constant over a plurality of predetermined times (e.g., 1 s) within the suction duration t100 (e.g., 3 s) sensed by the airflow sensor 250.

Or in still other variations, the pulse density of the PWM control signal is gradually reduced over a plurality of predetermined times (e.g., 1 s) during a single puff duration t100 (e.g., 3 s) sensed by the airflow sensor 250. The purpose of this arrangement is that at the beginning of a single puff, for example 1s, relatively much energy may be required as susceptor 30 rises from ambient (or cold) to temperature T0, and then at 2s or 3s, relatively little energy is required to immediately maintain the corresponding temperature as susceptor 30 already has a comparable temperature (or hot), so that as the puff duration advances, the pulse density of the PWM control signal within 2s or 3s is less than the pulse density within 1s, thereby making susceptor 30 exhibit the temperature profile of fig. 6.

As shown in fig. 4, the circuit 220 further includes:

A voltage regulator 223, such as a commonly used boost chip or buck voltage regulator chip; a voltage regulator 223 is connected between the positive electrode of the cell 210 and the half-bridge 224 in order to provide a constant driving voltage to the LC oscillator 222. In use, as the battery cell 210 is continuously discharged, the output voltage of the positive electrode of the battery cell 210 is gradually reduced, for example, the output voltage of the positive electrode of the battery cell 210 is 4.2V when the battery cell is fully charged, and the output voltage is 3.2V when the battery cell is at low power; a constant driving voltage may be output to the LC oscillator 222, for example, 4.0V, 4.5V, 6.0V, or the like, through the voltage regulator 223. After a constant output voltage is developed by the voltage regulator 223, it is advantageous for the MCU controller 221 to calculate and provide balanced energy to the susceptor 30.

Since the amount of energy provided by the inductive coil 260 to the susceptor 30 by the magnetic field in the LC oscillator 222 is substantially positively correlated with the duration of outputting a constant voltage to the LC oscillator 222 by the voltage regulator 223. In an embodiment, when the voltage regulator 223 outputs a stable driving voltage, for example, 4.0V, 4.5V, or 6.0V, the MCU controller 221 can calculate the energy value supplied to the susceptor 30 only by the sum of the on-times of the switching transistor Q1 and the switching transistor Q2 in the half bridge 224. While it is difficult to calculate the amount of energy supplied to susceptor 30 based on the greatly fluctuating positive voltage output by cell 210 when no steady drive voltage is provided by voltage regulator 223.

Specifically in fig. 5, the voltage regulator 223 employs a commonly used boost chip, and the main electronics include:

boost inductor L1 providing boost;

the filter capacitor C3 is used for filtering and outputting the boosted voltage;

A voltage dividing resistor R21 and a resistor R22 connected in series;

A switching tube Q3 and a switching tube Q4; in use, the MCU controller 221 determines the boosted voltage value by monitoring the voltage divided by the resistor R22, and then maintains the boosted voltage value to a desired preset value, for example, 4.0V, 4.5V, 6.0V, or the like by controlling on or off control of the switching transistors Q3 and Q4.

Or fig. 7 shows a schematic diagram of the basic components of a circuit 220 of yet another embodiment; in the embodiment shown in fig. 7, the circuit 220 includes:

an asymmetric LC oscillator 222a, with only one leg consisting of capacitor C2 in series with induction coil 260 a;

half bridge 224a, including switching tube Q1 and switching tube Q2;

The voltage stabilizer 223a is electrically connected between the half bridge 224a and the positive electrode of the battery cell 210;

the MCU controller 221a controls the on or off of the switching tube Q1 by sending a first PWM control signal to the switching tube Q1, and controls the on or off of the switching tube Q2 by sending a second PWM control signal to the switching tube Q2.

In the embodiment of fig. 7, the MCU controller 221a may emit the first PWM control signal and the second PWM control signal having the constant frequency of the natural resonant frequency and the constant duty ratio of 50% in the manner shown in fig. 5; and, the MCU controller 221a may modulate the pulse density of the first PWM control signal and/or the second PWM control signal based on a preset energy value required to be provided to the susceptor 30 during the triggering period of the air flow sensor 250.

In the above embodiment, the circuit 220 drives the oscillation of the LC oscillator 222/222a through the half-bridge 224/224a including the switching transistor Q1 and the switching transistor Q2.

Or in still other variant embodiments, the circuit 220 drives the oscillation of the LC oscillator 222/222a by a symmetrical full or H-bridge. Wherein, the full bridge or H bridge is the basic term of the electric field, the shape of the full bridge or H bridge is similar to the letter H, so the full bridge or H bridge is named as an H bridge, and particularly comprises 4 vertical legs of H formed by four switching tubes, and the load of the LC oscillator 222a connected in series is a bar in the H bridge; thereby forming a full-bridge drive or an H-bridge drive. And the oscillations of LC oscillators 222/222a are driven based on full or H-bridges are also symmetrical.

And in a similar embodiment, the MCU controller 221a may modulate the pulse density of the PWM control signal based on the preset energy value required to be provided to the susceptor 30 during the triggering period of the air flow sensor 250, thereby controlling the on and off of the four switching tubes in the full bridge or the H bridge to control the oscillation of the LC oscillator 222 a.

It should be noted that the description of the application and the accompanying drawings show preferred embodiments of the application, but are not limited to the embodiments described in the description, and further, that modifications or variations can be made by a person skilled in the art from the above description, and all such modifications and variations are intended to fall within the scope of the appended claims.

Claims

1. An electronic atomizing device, comprising:

a susceptor for heating an aerosol-generating substrate to produce an aerosol;

2. The electronic atomizing device of claim 1, further comprising:

An airflow sensor for sensing a pumping action of a user;

3. The electronic atomizing device of claim 1 or 2, wherein the LC oscillator has a resonant frequency; the frequency of the PWM signal is the same as the resonant frequency of the LC oscillator.

4. An electronic atomising device according to claim 1 or 2 wherein the duty cycle of the PWM signal is 50%.

5. The electronic atomizing device of claim 2, wherein the predetermined time includes at least a first predetermined time and a second predetermined time of sequential advancement during a duration of a single pumping action by the user; the pulse density of the PWM signal during the second predetermined time is less than the pulse density during the first predetermined time.

6. The electronic atomizing device according to claim 1 or 2, further comprising:

a voltage stabilizer for generating a constant voltage;

7. The electronic atomizing device of claim 6, wherein the controller is configured to calculate the amount of energy provided to the susceptor based on a length of time the constant voltage is provided to the LC oscillator.

8. The electronic atomizing device according to claim 1 or 2, further comprising:

the battery cell is used for supplying power;

a first switching tube and a second switching tube;

the capacitor comprises a first capacitor and a second capacitor;

9. An electronic atomizing device, comprising:

An airflow sensor for sensing a pumping action of a user;

10. A control method of an electronic atomizing device, the electronic atomizing device comprising:

a susceptor for heating an aerosol-generating substrate to produce an aerosol;

characterized in that the method comprises: