CN220545837U

CN220545837U - Aerosol generating device

Info

Publication number: CN220545837U
Application number: CN202320513742.9U
Authority: CN
Inventors: 范强; 操广平; 徐中立; 李永海
Original assignee: Shenzhen FirstUnion Technology Co Ltd
Current assignee: Shenzhen FirstUnion Technology Co Ltd
Priority date: 2023-03-10
Filing date: 2023-03-10
Publication date: 2024-03-01
Anticipated expiration: 2033-03-10

Abstract

An embodiment of the application discloses an aerosol-generating device, the aerosol-generating device comprising: a heating element and a power supply unit; one end of the heating circuit is electrically connected with the power supply unit, and the other end of the heating circuit is electrically connected with the heating element; a controller; the heating circuit includes: a first branch and a second branch connected in parallel with the first branch; the aerosol generating device is provided with a preheating stage and a constant temperature stage, the controller is respectively and electrically connected with the first switching element and the second switching element, and is configured to control the first switching element to be in a cut-off state and control the second switching element to be in a conduction state in the preheating stage so that the power supply unit can supply electric energy to the heating element through the first branch; the first switching element is controlled to be in an on state and the second switching element is controlled to be in an off state in the constant temperature stage, so that the power supply unit supplies electric energy to the heating element through the second branch. In this way, the power consumption of the aerosol-generating device may be reduced.

Description

Aerosol generating device

[ field of technology ]

The embodiment of the application relates to the technical field of aerosols, in particular to an aerosol generating device.

[ background Art ]

Aerosol-generating devices generally comprise a chamber for receiving a cigarette-like aerosol-product for use with the aerosol-generating device and a heating element for heating the aerosol-product in the chamber so as to volatilize a portion of the active substance in the aerosol-product by heating to produce an aerosol.

The aerosol-generating device described above generally has a preheating stage and a constant temperature stage, the preheating stage being a stage in which a high-power discharge of the electrical core of the aerosol-generating device rapidly heats the aerosol-product to a predetermined temperature by means of a heating element. The constant temperature stage refers to that the battery cell maintains the temperature of the aerosol product with a relatively small heating power, and the battery cell supplies power to the heating element through the same power supply circuit in both the preheating stage and the constant temperature stage, so that unnecessary power loss is generated in the constant temperature stage.

[ utility model ]

The embodiment of the application provides an aerosol generating device to solve the technical problem that unnecessary power consumption is generated in a constant temperature stage at present.

An aerosol-generating device comprising:

a heating element for heating the aerosol product to produce an aerosol;

a power supply unit for supplying electric power to the heating element;

a heating circuit, one end of which is electrically connected with the power supply unit, and the other end of which is electrically connected with the heating element;

a controller for controlling the power supply unit to supply electric power to the heating element through the heating circuit;

the heating circuit includes:

a first branch circuit provided with a second switching element and a boost circuit connected in series with the second switching element, wherein one end of the second switching element is electrically connected with the power supply unit, and one end of the boost circuit is electrically connected with the heating element;

a second branch provided with a first switching element, one end of which is electrically connected with the power supply unit, and the other end of which is electrically connected with the heating element;

the driving circuit is provided with an input end and an output end, the input end is electrically connected between the second switching element and the boost circuit, the output end is electrically connected with the boost circuit, the input end is used for supplying power to the driving circuit, and the output end is used for providing driving signals for the boost circuit;

wherein the aerosol-generating device has a pre-heating stage and a thermostatic stage, the controller being electrically connected to the first switching element and the second switching element, respectively, the controller being configured to control the first switching element to be in an off-state while controlling the second switching element to be in an on-state during the pre-heating stage, so that the power supply unit provides electrical energy to the heating element through the first branch; and controlling the first switching element to be in a conducting state and controlling the second switching element to be in a cutting-off state in the constant temperature stage, so that the power supply unit can supply electric energy to the heating element through the second branch.

In one embodiment, the first switching element is configured to be turned on or off in dependence of a second preset temperature of the thermostatic stage and a second actual temperature of the heating element in the thermostatic stage.

In one embodiment, the first switching element includes a MOS transistor.

In one embodiment, the first switching element includes a first PMOS transistor and a second PMOS transistor, the G poles of the first PMOS transistor and the second PMOS transistor are electrically connected to the controller, the S pole of the first PMOS transistor is electrically connected to the positive pole of the power supply unit, the S pole of the second PMOS transistor is electrically connected to the heating element, and the D pole of the first PMOS transistor is electrically connected to the D pole of the second PMOS transistor.

In one embodiment, the second branch further includes a third switching element, the third switching element having an input terminal and an output terminal, the input terminal being electrically connected to the controller, the output terminal being electrically connected to the G pole in the first switching element, the third switching element being configured to turn on and output a low level signal when the controller outputs a high level signal; and when the controller outputs a low level signal, the third switching element is in an off state.

In one embodiment, the third switching element includes an NMOS transistor, a G pole of the NMOS transistor is electrically connected to the controller, an S pole of the NMOS transistor is electrically connected to a reference, and a D pole of the NMOS transistor is electrically connected to the G pole of the first switching element.

In one embodiment, the second branch further comprises a fourth switching element connected in series with the first switch, the fourth switching element being connected between the heating element and a reference ground, the first switching element being configured to be in an on state, the fourth switching element being configured to be on or off depending on a second preset temperature of the thermostatic stage and a second actual temperature of the heating element in the thermostatic stage.

In one embodiment, the fourth switching element includes an NMOS transistor, a G-pole of the NMOS transistor is electrically connected to the controller, a D-pole of the NMOS transistor is electrically connected to the heating element, and an S-pole of the NMOS transistor is electrically connected to the reference.

In one embodiment, the BOOST circuit includes a BOOST circuit, one end of the BOOST circuit is electrically connected to the power supply unit, and the other end is electrically connected to the heating element.

In one embodiment, the BOOST circuit includes a first NMOS and a second NMOS connected in parallel with the first NMOS, the first NMOS and the second NMOS have a parallel point a, an inductance is connected in series between the parallel point a and the power supply unit, a G pole of the first NMOS is electrically connected with the driving circuit, a D pole of the first NMOS is electrically connected with the parallel point a, and an S pole of the first NMOS is electrically connected with a reference ground; and the S pole of the second NMOS tube is electrically connected with the parallel point position A, the G pole is electrically connected with the driving circuit, and the D pole is electrically connected with the heating element.

The aerosol-generating device provided in the above embodiment, by providing the first branch and the second branch connected in parallel between the power supply unit and the heating element, when the aerosol-generating device is in the preheating stage, the first switching element is controlled to be in the off state by the controller, and the second switching element is controlled to be in the on state at the same time, so that the power supply unit supplies electric energy to the heating element through the first branch; and when the aerosol-generating device is in a constant temperature stage, the controller controls the first switching element to be in an on state and controls the second switching element to be in an off state, so that the power supply unit supplies electric energy to the heating element through the second branch.

Compared with the prior art, the aerosol generating device provided by the embodiment can avoid the power consumption of the driving circuit in the constant temperature stage process, thereby improving the endurance time of the aerosol generating device to a certain extent.

[ description of the 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 scale, unless expressly stated otherwise.

Fig. 1 is a schematic structural view of an aerosol-generating device according to an embodiment of the present application;

fig. 2 is a schematic structural view of an aerosol-generating device according to another embodiment of the present application;

fig. 3 is a schematic structural view of an aerosol-generating device according to a further embodiment of the present application;

FIG. 4 is a schematic circuit diagram of the gas-dissolved pole generating apparatus in FIG. 1;

FIG. 5 is a schematic circuit diagram of the second branch circuit in FIG. 4;

FIG. 6 is a schematic diagram of another circuit structure of the second branch of FIG. 4;

FIG. 7 is a schematic diagram of a circuit structure of the second branch of FIG. 4;

fig. 8 is a schematic diagram of a structure of the boost circuit in the first branch in fig. 4.

[ detailed description ] of the utility model

In order to facilitate an understanding of the present application, the present application will be described in more detail below with reference to the accompanying drawings and specific examples. It will be understood that when an element is referred to as being "fixed" to/affixed to "another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms "upper", "lower", "left", "right", "inner", "outer" and the like are used in this specification for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.

In addition, the technical features described below in the different embodiments of the present application may be combined with each other as long as they do not collide with each other.

In the embodiments of the present application, the "mounting" includes welding, screwing, clamping, adhering, etc. to fix or limit a certain element or device to a specific position or place, where the element or device may be fixed at the specific position or place or may be movable within a limited range, and the element or device may be removable or not removable after being fixed at the specific position or place, which is not limited in the embodiments of the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

An embodiment of the present application provides an aerosol-generating device 100, as shown in fig. 1, the aerosol-generating device includes a chamber 10, a heating element 20, a coil 30, a power supply unit 40, and a main board 50, wherein the coil 30 and the power supply unit 40 are electrically connected to the main board 50, and a controller of the aerosol-generating device is disposed on the main board 50. The chamber 10 is for receiving the aerosol product 200, the heating element 20 extends at least partially into the chamber 10, and the end thereof that extends into the chamber 10 is configured in a pin-like or sheet-like manner so that the heating element 20 is inserted into the aerosol 200 for heating. The coil 30 is wound on the outer wall of the chamber 10, the main board 50 controls the power supply unit 40 to supply alternating current to the coil 30, the coil 30 generates an alternating magnetic field under the action of the alternating current, the alternating magnetic field penetrates the heating element 20 to enable the heating element 20 to induce eddy currents, and the heating element 20 generates heat under the action of the eddy currents to heat the aerosol product 200. The power supply unit 40 may be a rechargeable battery cell or a non-rechargeable battery cell.

The aerosol-product 200 may preferably be configured in an elongated cigarette shape to facilitate insertion of the aerosol-product 200 into an aerosol-generating device. The aerosol article 200 preferably employs a tobacco-containing material that releases volatile compounds from a matrix upon heating; or may be a non-tobacco material capable of being heated and thereafter adapted for electrical heating for smoking. The aerosol article 200 preferably employs a solid matrix, which may include one or more of powders, granules, shredded strips, ribbons, or flakes of one or more of vanilla leaves, tobacco leaves, homogenized tobacco, expanded tobacco; alternatively, the solid substrate may contain additional volatile flavour compounds, either tobacco or non-tobacco, to be released when the substrate is heated.

The material of the heating element 20 may be any of graphite, molybdenum, silicon carbide, stainless steel, niobium, aluminum, nickel, iron, copper, nickel-containing compounds, titanium, and metal material composites. In some embodiments, to better induce eddy currents to increase heating efficiency, the material of the cavity is preferably or consists of ferromagnetic materials, such as ferrite iron, ferromagnetic alloys (e.g., ferromagnetic steel or stainless steel), ferromagnetic particles, and ferrite.

Alternatively, in some embodiments, as shown in fig. 2, the heating element 20 may be made of a resistive heating material capable of generating heat by itself, and has electrode pins (not shown) electrically connected to the main board 50, so that the controller on the main board 50 can control the power supply unit 40 to supply electric power to the heating element 20 through the electrode pins. For example, the heating element 20 may be a ceramic heating element, which is a heating element made by sintering and fixing an electrothermal body and ceramic at high temperature.

Or in some embodiments, as shown in fig. 3, the heating element 20 is a mesh-shaped resistive heating element wrapped around the outer wall of the chamber 10, and the heating element 20 generates heat when energized and transfers the heat into the chamber 10 through the wall of the chamber 10 to heat the aerosol product 200 in the chamber 10. At this time, the cavity material of the chamber 10 is made of a high heat conduction material, so as to efficiently conduct the heat generated by the heating element 20 to the aerosol product 200. The high thermal conductivity material may be a metal or a ceramic material, and the ceramic material may be any one of an oxide, nitride, carbide, boride, and the like.

Or in some embodiments, the aerosol-generating device 100 may also employ infrared heating. Specifically, an infrared electrothermal coating may be coated on the outer wall of the chamber 10, and the infrared electrothermal coating is used for receiving electric power to generate heat, so as to generate infrared rays with a certain wavelength, and when the wavelength of the infrared rays is matched with the absorption wavelength of the aerosol product 200, the energy of the infrared rays is easily absorbed by the aerosol product 200, so that heat is generated on the aerosol product 200.

Further, as shown in fig. 4, the controller 60 and the heating circuit 51 of the aerosol-generating device 100 are disposed on the main board 50, one end of the heating circuit 51 is electrically connected to the power supply unit 40, the other end is electrically connected to the heating element 20, and the controller 60 controls the power supply unit 40 to supply electric power to the heating element 20 through the heating circuit 51. The heating circuit 51 includes:

the first branch 511 is provided with a second switching element 5113 and a boost circuit 5112 connected in series with the second switching element 5113, one end of the second switching element 5113 is electrically connected with the power supply unit 40, and one end of the boost circuit 5112 is electrically connected with the heating element 20.

The second branch 512, the second branch 512 is provided with a first switching element 5121, one end of the first switching element 5121 is electrically connected to the power unit 40, and the other end of the first switching element 5121 is electrically connected to the heating element 20, so that the first branch 511 and the second branch 512 are connected in parallel between the power unit 40 and the heating element 20.

The driving circuit 5111 has an input end and an output end, the input end is electrically connected between the second switching element 5113 and the boost circuit 5112, the output end is electrically connected with the boost circuit 5112, the input end is used for enabling the first branch 511 to supply power to the driving circuit 5111, and the output end is used for providing a driving signal for the boost circuit 5112 so as to drive the boost circuit 5112 to work normally.

The aerosol-generating device 100 generally has a pre-heating stage in which the power supply unit 40 of the aerosol-generating device 100 supplies electrical energy to the heating element 20 at a relatively high power, causing the heating element 20 to rapidly rise to a first preset temperature at which the aerosol-product 200 may be volatilized by heat to produce an aerosol, and a constant temperature stage. The constant temperature stage is a stage in which the power supply unit 40 provides a relatively small heating power to maintain the heating element 20 at a second preset temperature, which may be substantially the same as the first preset temperature, or slightly greater or slightly less than the first preset temperature, to ensure that the aerosol product 200 may be volatilized by heat to generate an aerosol throughout the constant temperature stage.

The controller 60 is configured to be electrically connected to the first switching element 5121 and the second switching element 5113, respectively, and when the aerosol-generating device 100 is in the preheating stage, the controller 60 controls the first switching element 5121 to be in the off state and controls the second switching element 5113 to be in the on state, so that the power supply unit 40 supplies electric power to the heating element 40 through the first branch 511. At this time, since the first branch 511 is turned on, the first branch 511 can supply power to the driving circuit 5111, the driving circuit 5111 further generates a driving signal to drive the booster circuit 5112 to operate, and the booster circuit 5112 boosts the voltage of the power unit 40 and applies the boosted voltage to the heating element 20, so that the heating element 20 can rapidly heat.

While when the aerosol-generating device 100 is in the constant temperature phase, the controller 60 controls the first switching element 5121 to be in an on state and controls the second switching element 5113 to be in an off state, so that the power supply unit 40 supplies electric power to the heating element 20 through the second branch 512.

In the prior art, the power supply unit 40 supplies power to the heating element 20 through the first branch 511, both in the preheating stage and in the constant temperature stage, and the driving circuit 5111 in the first branch 511 is liable to generate power consumption. While the aerosol-generating device 100 provided in this embodiment is provided, by providing the second branch 512 connected in parallel with the first branch 511 between the power supply unit 40 and the heating element 20, the power supply unit 40 can supply electric energy to the heating element 20 through the first branch 511 when the aerosol-generating device 100 is in the preheating stage; when the aerosol-generating device 100 is in the constant temperature stage, the power supply unit 40 provides the electric energy to the heating element 20 through the second branch 512, and the driving circuit 5111 is not provided in the second branch 512, so that the driving circuit 5111 can be prevented from generating power consumption during the constant temperature stage when the aerosol-generating device 100 is in the constant temperature stage, thereby improving the duration of the aerosol-generating device 100 to a certain extent.

For example, the prior art aerosol-generating device 100 may last 10 aerosol-products 200 after being fully charged, and after adopting the solution provided in the present embodiment, the aerosol-generating device 100 may last 11 aerosol-products 200 after being fully charged, and may last 1 more aerosol-products 200 than the prior art aerosol-generating device 100.

In some embodiments, the heating element 20 is provided with a temperature sensing element (not shown) electrically connected to the controller 60 of the aerosol-generating device 100, the temperature sensing element being adapted to detect an actual temperature of the heating element 20 and to send the actual temperature to the controller 60. When the user needs to use the aerosol-generating device 100, the aerosol-generating device 100 is started, the aerosol-generating device 100 enters a preheating stage, at this time, the controller 60 controls the first switching element 5121 to be in an off state, and controls the second switching element 5113 to be in an on state, the power supply unit 40 supplies electric energy to the heating element 20 through the first branch 511, the power supply unit 40 can supply larger power to the heating element 20, the temperature of the heating element 20 is quickly increased under the action of high-power supply, the temperature sensing element acquires a first actual temperature of the heating element 20 and transmits the first actual temperature to the controller 60, the controller 60 can compare the first actual temperature with a first preset temperature, when the first actual temperature reaches the first preset temperature, the controller 60 judges that the aerosol-generating device 100 is completely preheated, the controller 60 controls the first switching element 5121 to be in an on state, and controls the second switching element 5113 to be in an off state, and the power supply unit 40 supplies electric energy to the heating element 20 through the second branch 512, and the aerosol-generating device 100 enters a constant temperature stage.

It is readily understood that the first preset temperature, at which the heating element 20 heats the aerosol product 200 to produce a suitable aerosol, may be preset in the controller 60, which is the temperature that needs to be reached during the pre-heating stage.

In other embodiments, the preheating period may be determined by obtaining the heating time of the heating element 20, without obtaining the temperature of the heating element 20. In general, the duration of the preheating phase of the aerosol-generating device 100 is fixed, and a timer may be provided in the aerosol-generating device 100, when the user activates the aerosol-generating device 100 to enter the preheating phase, the controller 60 controls the power supply unit 40 to supply power to the heating element through the first branch 511, and the controller 60 controls the timer to record the heating time of the heating element 20 in the preheating phase, and when the heating time reaches the preset heating time, the controller 60 may determine that the preheating phase is completed, and the controller 60 controls the power supply unit 40 to supply power to the heating element through the second branch 512, thereby causing the aerosol-generating device 100 to enter the constant temperature phase.

In some embodiments, the first switching element 5121 is used to maintain the temperature of the constant temperature stage at a second preset temperature at which the aerosol product 200 is heated to generate an aerosol.

Specifically, if the second preset temperature in the constant temperature stage is 200 degrees, after the first switching element 5121 is turned on, the power unit 40 may continuously increase the temperature of the heating element 20 through the second branch 512, so that the second actual temperature of the heating element 20 exceeds 200 degrees, at this time, the temperature sensor feeds back the second actual temperature to the controller 60, the controller 60 compares the second actual temperature of the heating element 20 with the second preset temperature, and controls the first switching element 5121 to be turned off according to the comparison result, so that the second branch 512 is turned off, the power unit 40 cannot continuously supply the power to the heating element 20, and the second actual temperature of the heating element 20 gradually decreases to the second preset temperature. When the temperature falls below the second preset temperature, the controller 60 controls the first switching element 5121 to be turned on again, so that the second actual temperature of the heating element 2 rises to the second preset temperature again. So that the actual temperature of the heating element 20 is maintained substantially at the second preset temperature by controlling the first switching element 5121 to be continuously turned on or off.

In some embodiments, the first switching element 5121 preferably adopts a MOS transistor (Metal-Oxide-Semiconductor Field-Effect Transistor), which has advantages of low power consumption, no current consumption, and a transistor requiring a continuous current to maintain the on state of the switch, and relatively high power consumption.

Further in some embodiments, as shown in fig. 5, the first switching element 5121 includes a first PMOS tube 51211 and a second PMOS tube 51212, the G poles of the first PMOS tube 51211 and the second PMOS tube 51212 are electrically connected to the controller 60, the S pole of the first PMOS tube 51211 is electrically connected to the positive pole of the power supply unit 40, the S pole of the second PMOS tube 51212 is electrically connected to the heating element 20, and the D pole of the first PMOS tube is electrically connected to the D pole of the second PMOS tube, so that the first PMOS tube 51211 and the second PMOS tube 51212 are configured in a manner of deviating from each other, thereby preventing the voltage of the heating element 20 from being reversely poured into the power supply unit 40.

When the aerosol-generating device 100 is in the preheating stage, the controller 60 controls to send high-level signals to the G poles of the first PMOS transistor 51211 and the second PMOS transistor 51212, so that the first PMOS transistor 51211 and the second PMOS transistor 51212 are respectively in the off state, and at this time, the second branch 512 is disconnected, and the power supply unit 40 provides electric energy to the heating element 20 through the first branch 511; when the aerosol-generating device 100 is in the constant temperature stage, the controller 60 controls the low level signals to be sent to the G poles of the first PMOS transistor 51211 and the second PMOS transistor 51212, so that the first PMOS transistor 51211 and the second PMOS transistor 51212 are respectively in the on state, and the controller 60 controls the second switching element 5112 to be in the off state, and the power supply unit 40 supplies power to the heating element 20 through the second branch 512.

It should be noted that, the controller 60 is usually an MCU (Microcontroller Unit, a single-chip microcomputer) of the aerosol-generating device 100, and can output PWM (Pulse Width Modulation ) control signals, where the PWM signals include a high level signal and a low level signal, and by connecting the PWM control signals to the G poles of the first PMOS tube 51211 and the second PMOS tube 51212, the on or off of the first PMOS tube 51211 and the second PMOS tube 51212 can be controlled.

Further in some embodiments, as shown in fig. 6, for convenience of control, the second branch 512 further includes a third switching element 5122, where an input end of the third switching element 5122 is electrically connected to the controller 60, and an output end of the third switching element is electrically connected to the G poles of the first PMOS transistor 51211 and the second PMOS transistor 51212. The third switching element 5122 is configured to be turned on and output a low level when the input terminal is at a high level, and the low level is loaded on the G electrodes of the first PMOS transistor 51211 and the second PMOS transistor 51212, and both the first PMOS transistor 51211 and the second PMOS transistor 51212 are turned on; and when the input terminal of the third switching element 5122 is at a low level, the third switching element 5122 is turned off, and at this time, the first switching element 5121 is also in an off state. Further, the third switching element 5122 can realize synchronous control, that is, when the controller 60 outputs a high level, the first switching element 5121 is turned on, so that the second branch 512 is turned on; and when the controller 60 outputs a low level, the first switching element 5121 is turned off, thereby closing the second branch 512.

Specifically, as shown in fig. 6, the third switching element 5122 is an NMOS transistor, the G electrode of the NMOS transistor 5122 is electrically connected to the controller 60, the S electrode of the NMOS transistor 5122 is electrically connected to the reference ground, and the D electrode of the NMOS transistor 5122 is electrically connected to the G electrodes of the first PMOS transistor 51211 and the second PMOS transistor 51212, so that when the controller 60 inputs a high level to the G electrode of the NMOS transistor 5122, the NMOS transistor is turned on, and inputs a low level signal to the D electrode, and the low level signal is loaded on the G electrodes of the first PMOS transistor 51211 and the second PMOS transistor 51212, thereby turning on the first PMOS transistor 51211 and the second PMOS transistor 51212; when the controller 60 inputs a low level to the G pole of the NMOS transistor 5122, the NMOS transistor 5122 enters an off state, and the first switching element 5122 also enters an off state.

In some embodiments, as shown in fig. 7, the second branch 512 further includes a fourth switching element 5123 connected in series with the first switching element 5121, where the fourth switching element 5123 is electrically connected between the heating element 20 and the reference ground, and the first switching element 5121 is configured to be in an on state, and the fourth switching element 5123 is configured to maintain the second preset temperature of the constant temperature stage, that is, the fourth switching element 5123 is configured to be turned on or off according to the second preset temperature of the constant temperature stage and the second actual temperature of the heating element 20 in the constant temperature stage. When the second actual temperature of the heating element 20 exceeds the second preset temperature, the controller 60 controls the fourth switching element 5123 to be turned off, and at this time, the second branch 512 is turned off, and the second actual temperature of the heating element 20 is reduced to the second preset temperature; when the second actual temperature of the heating element 20 is lower than the second preset temperature, the controller 60 controls the fourth switching element 5123 to be turned on again, and the second branch 512 is turned on, the power unit 40 supplies power to the heating element 20 again through the second branch 512, and the temperature of the heating element 20 rises to the second preset temperature again.

In comparison with the first switching element 5121 for maintaining the second preset temperature of the constant temperature stage, the fourth switching element 5123 is provided, and the fourth switching element 5123 is disposed between the heating element 20 and the reference ground, so that the fourth switching element 5123 is more convenient for maintaining the second preset temperature of the constant temperature stage.

In the implementation shown in fig. 7, the fourth switching element 5123 preferably adopts an NMOS transistor, the on-resistance of the NMOS transistor is small, the input capacitance is also small, and the response speed of the NOMS transistor is fast, so that the NMOS transistor can work in a wider frequency. Specifically, the G pole of the NMOS tube 5123 is electrically connected to the controller 60, the D pole of the NMOS tube 5123 is electrically connected to the heating element 20, the S pole of the NMOS tube 5123 is electrically connected to the reference, and when the second actual temperature of the heating element 20 exceeds the second preset temperature, the controller 60 applies a low level to the G pole of the NMOS tube 5123, and the NMOS tube 5123 is in an off state, so that the second actual temperature of the heating element 20 is reduced to the second preset temperature; when the second actual temperature of the heating element 20 is lower than the second preset temperature, the controller 60 applies a high level to the G pole of the NMOS 5123, and the NMOS 5123 is in the on state, so that the second actual temperature of the heating element 20 rises to the second preset temperature.

In some embodiments, to facilitate reducing the design complexity of the aerosol-generating device 100, the BOOST circuit 5112 employs a BOOST circuit, as shown in fig. 8. Specifically, one end of the BOOST circuit is electrically connected to the power supply unit 40, the other end of the BOOST circuit is electrically connected to the heating element 20, the BOOST circuit 5112 further includes a first NMOS tube 51121, and a second NMOS tube 51122 connected in parallel with the first NMOS tube 51121, the first NMOS tube 51121 and the second NMOS tube 51122 have a parallel point position a, an inductance 51123 is connected in series between the parallel point position a and the power supply unit 40, a G pole of the first NMOS tube 51121 is electrically connected to the driving circuit 5111, a D pole is electrically connected to the parallel point position a, and a S pole is electrically connected to a reference ground; the S pole of the second NMOS 51122 is electrically connected to the parallel point a, the G pole is electrically connected to the driving circuit 5111, and the D pole is electrically connected to the heating element 20. The G poles of the first NMOS tube 51121 and the first NMOS tube 51121 are electrically connected to the driving circuit 5111, and the driving signal generated by the driving circuit 5111 is loaded on the first NMOS tube 51121 and the first NMOS tube 51121 respectively, so that the first NMOS tube 51121 and the first NMOS tube 51121 are in an on or off state. It is to be readily understood that the driving circuit 5111 is electrically connected to the controller 60, and the controller 60 controls the driving circuit 5111 to generate the driving signals described above.

The operation principle of the booster circuit 5112 is as follows:

the driving circuit 5111 controls the first NMOS 51121 to be in a conducting state, and controls the second NMOS 51122 to be in a cutting-off state, at this time, the power unit 40 charges the inductor 51123, and the inductor 51123 can store the energy released by the power unit 40 due to the energy storage function of the inductor 51123; while the driving circuit controls the first NMOS 51121 to be in the off state and controls the second NMOS 51122 to be in the on state, at this time, the power supply unit 40 and the inductor 51123 discharge the heating element 20 simultaneously, the voltages discharged by the two are superimposed, and the voltage after the superposition is loaded on the heating element 20, so that the heating element 20 is heated up rapidly.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; the technical features of the above embodiments or in the different embodiments may also be combined under the idea of the present application, the steps may be implemented in any order, and there are many other variations of the different aspects of the present application as described above, which are not provided in details for the sake of brevity; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An aerosol-generating device, comprising:

a heating element for heating the aerosol product to produce an aerosol;

a power supply unit for supplying electric power to the heating element;

the heating circuit includes:

2. Aerosol-generating device according to claim 1, characterized in that the first switching element is configured to be switched on or off depending on a second preset temperature of the thermostatic stage and a second actual temperature of the heating element in the thermostatic stage.

3. An aerosol-generating device according to claim 1, wherein the first switching element comprises a MOS transistor.

4. An aerosol-generating device according to claim 3, wherein the first switching element comprises a first PMOS tube and a second PMOS tube, the G poles of the first PMOS tube and the second PMOS tube are both electrically connected to the controller, the S pole of the first PMOS tube is electrically connected to the positive pole of the power supply unit, the S pole of the second PMOS tube is electrically connected to the heating element, and the D pole of the first PMOS tube is electrically connected to the D pole of the second PMOS tube.

5. An aerosol-generating device according to claim 4, further comprising a third switching element in the second branch, the third switching element having an input and an output, the input being electrically connected to the controller, the output being electrically connected to a G-pole of the first switching element, the third switching element being configured to turn on and output a low-level signal when the controller outputs a high-level signal; and when the controller outputs a low level signal, the third switching element is in an off state.

6. An aerosol-generating device according to claim 5, wherein the third switching element comprises an NMOS transistor, the G-pole of the NMOS transistor being electrically connected to the controller, the S-pole of the NMOS transistor being electrically connected to a reference ground, the D-pole of the NMOS transistor being electrically connected to the G-pole of the first switching element.

7. An aerosol-generating device according to claim 1, wherein the second branch further comprises a fourth switching element connected in series with the first switch, the fourth switching element being connected between the heating element and a reference ground, the first switching element being configured to be in an on-state, the fourth switching element being configured to be on or off in dependence on a second preset temperature of the thermostatic stage and a second actual temperature of the heating element in the thermostatic stage.

8. An aerosol-generating device according to claim 7, wherein the fourth switching element comprises an NMOS tube, the G-pole of which is electrically connected to the controller, the D-pole of which is electrically connected to the heating element, and the S-pole of which is electrically connected to the reference.

9. An aerosol-generating device according to claim 1, wherein the BOOST circuit comprises a BOOST circuit having one end electrically connected to the power supply unit and the other end electrically connected to the heating element.

10. The aerosol-generating device of claim 9, wherein the BOOST circuit comprises a first NMOS tube and a second NMOS tube connected in parallel with the first NMOS tube, the first NMOS tube and the second NMOS tube having a parallel point a, an inductance is connected in series between the parallel point a and the power supply unit, a G-pole of the first NMOS tube is electrically connected with the driving circuit, a D-pole is electrically connected with the parallel point a, and a S-pole is electrically connected with a reference ground; and the S pole of the second NMOS tube is electrically connected with the parallel point position A, the G pole is electrically connected with the driving circuit, and the D pole is electrically connected with the heating element.