Susceptor and electronic atomization device

Abstract

The present application provides a susceptor and an electronic atomization device. The electronic atomization device comprises: a liquid storage cavity used for storing a liquid matrix capable of being atomized; a magnetic field generator configured to generate a varying magnetic field; and a susceptor used for heating the liquid matrix from the liquid storage cavity to generate an aerosol. The susceptor comprises a base made of a material that is magnetically conductive and not electrically conductive and an electrical conductor bonded to at least part of the base. The base is configured to be capable of twisting or gathering at least some of magnetic lines of force in the magnetic field such that the some of magnetic lines of force can pass through the electrical conductor. The electrical conductor is configured to be capable of being penetrated by the varying magnetic field to generate heat. According to the susceptor and the electronic atomization device provided above, the base is made of a material that is magnetically conductive and not electrically conductive, and the electrical conductor is bonded to at least part of the base; the base can increase the magnetic flux of the electrical conductor, thereby increasing the eddy current loss of the electrical conductor, i.e., generating more heat; the heating efficiency of the susceptor is improved, and the user experience is improved.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese Patent Application No. 202310903831.9, filed with the China National Intellectual Property Administration on July 20, 2023 and entitled "SUSCEPTOR AND ELECTRONIC ATOMIZATION DEVICE", which is incorporated herein by reference in its entirety.TECHNICAL FIELD

[0002] This application relates to the field of electronic atomization technologies, and in particular, to a susceptor and an electronic atomization device.BACKGROUND

[0003] Electronic atomization devices for heating an aerosol-forming substrate based on induction are generally known from the prior art. The devices may each include an induction source configured to generate an alternating electromagnetic field. The alternating electromagnetic field causes at least one of a heat-generating eddy current or a magnetic hysteresis loss in a susceptor. The susceptor thus heated is in thermal proximity to the aerosol-forming substrate, and the aerosol-forming substrate, when heated, can release volatile compounds to form an aerosol. The existing electronic atomization device has the problem that heating efficiency of the susceptor is low.SUMMARY

[0004] This application provides a susceptor and an electronic atomization device, to improve heating efficiency of the susceptor.

[0005] An aspect of this application provides an electronic atomization device, including: a liquid storage cavity, configured to store an atomizable liquid substrate; a magnetic field generator, configured to generate a varying magnetic field; and a susceptor, configured to heat the liquid substrate from the liquid storage cavity to generate an aerosol, where the susceptor includes a base body made of a material that is magnetically conductive and not electrically conductive and an electrical conductor bonded to at least part of the base body, the base body is configured to be capable of twisting or gathering at least some of magnetic lines of force in the magnetic field such that the some of magnetic lines of force can pass through the electrical conductor, and the electrical conductor is configured to be capable of being penetrated by the varying magnetic field to generate heat.

[0006] In an example, the electrical conductor is bonded to part of a surface of the base body.

[0007] In an example, in a length direction of the base body, the electrical conductor is located at a center of the base body.

[0008] In an example, the electrical conductor surrounds a portion of an outer surface of the base body.

[0009] In an example, the electrical conductor is paramagnetic.

[0010] In an example, the electrical conductor is bonded to the base body through at least one of etching, coating, plating, deposition, encapsulation, or mounting.

[0011] In an example, the electrical conductor includes an electrically conductive trace bonded to at least part of a surface of the base body.

[0012] In an example, mass of the electrical conductor ranges from 1 mg to 9 mg.

[0013] In an example, a surface of the base body is covered with a protective layer to isolate the base body from the liquid substrate.

[0014] In an example, the base body includes a ferromagnetic or ferrimagnetic material.

[0015] In an example, the base body includes at least one of manganese zinc ferrite, manganese magnesium ferrite, nickel zinc ferrite, or cobalt zinc barium ferrite.

[0016] In an example, a Curie temperature of the material of the base body ranges from 150°C to 400°C.

[0017] In an example, the base body is configured to suck the liquid substrate in the liquid storage cavity and transfer the sucked liquid substrate to the electrical conductor.

[0018] In an example, the base body is constructed as a tubular, rod-shaped, sheet-like or plate-like structure.

[0019] In an example, the electronic atomization device further includes a liquid transfer unit configured to transfer the liquid substrate to the susceptor, where the susceptor is arranged on a surface of the liquid transfer unit or at least partially buried in the liquid transfer unit.

[0020] In an example, the magnetic field generator includes an induction coil, and an operating frequency provided to the induction coil ranges from 100 kHz to 3 MHz.

[0021] Another aspect of this application provides a susceptor for an electronic atomization device. The susceptor includes a base body and an electrical conductor bonded to at least part of the base body, where the base body is made of a material that is magnetically conductive and not electrically conductive, the base body is configured to be capable of twisting or gathering at least some of magnetic lines of force in a magnetic field such that the some of magnetic lines of force can pass through the electrical conductor, and the electrical conductor is configured to be capable of being penetrated by the magnetic lines of force to generate heat.

[0022] Another aspect of this application provides an electronic atomization device, including: a liquid storage cavity, configured to store an atomizable liquid substrate; a magnetic field generator, configured to generate a varying magnetic field; and a susceptor, configured to heat the liquid substrate from the liquid storage cavity to generate an aerosol, where the susceptor includes a base body and an electrical conductor bonded to at least part of the base body; the electrical conductor is configured to be capable of being penetrated by the varying magnetic field to generate heat, and mass of the electrical conductor ranges from 1 mg to 9 mg.

[0023] According to the susceptor and the electronic atomization device provided above, the base body is made of a material that is magnetically conductive and not electrically conductive, and the electrical conductor is bonded to at least part of the base body; the base body can increase a magnetic flux of the electrical conductor, thereby increasing an eddy current loss of the electrical conductor, i.e., generating more heat; the heating efficiency of the susceptor is improved, and user experience is improved.BRIEF DESCRIPTION OF THE DRAWINGS

[0024] One or more embodiments are exemplarily described with reference to corresponding figures in the accompanying drawings, and these exemplary descriptions do not constitute a limitation on the embodiments. Components in the accompanying drawings that have same reference numerals are represented as similar components, and unless otherwise specified, the figures in the accompanying drawings are not drawn to scale. FIG. 1 is a schematic diagram of an electronic atomization device according to an implementation of this application; FIG. 2 is a schematic diagram of a susceptor according to an implementation of this application; FIG. 3 is a schematic diagram of another susceptor according to an implementation of this application; FIG. 4 is a schematic diagram of still another susceptor according to an implementation of this application; and FIG. 5 is a schematic diagram of yet another susceptor according to an implementation of this application. DETAILED DESCRIPTION

[0025] For ease of understanding of this application, this application is described below in more detail with reference to accompanying drawings and specific implementations. It should be noted that, when a component is expressed as "being fixed to" another component, the component may be directly on the another component, or one or more intermediate components may exist between the component and the another component. When a component is expressed as "being connected to" another component, the component may be directly connected to the another component, or one or more intermediate components may exist between the component and the another component. The terms "upper", "lower", "left", "right", "inner", "outer", and similar expressions used in this specification are merely used for an illustrative purpose.

[0026] Unless otherwise defined, meanings of all technical and scientific terms used in this specification are the same as those usually understood by a person skilled in the technical field to which this application belongs. The terms used in this specification of this application are merely intended to describe objectives of the specific embodiments, and are not intended to limit this application. The term "and / or" used in this specification includes any or all combinations of one or more related listed items.

[0027] FIG. 1 is a schematic diagram of an electronic atomization device according to an implementation of this application.

[0028] As shown in FIG. 1, an electronic atomization device 100 includes an atomizer 10 and a power supply assembly 20.

[0029] In an example, the atomizer 10 is removably connected to the power supply assembly 20, and the atomizer 10 may be in snap-fit connection, magnetic connection, or the like to the power supply assembly 20.

[0030] In an example, the atomizer 10 and the power supply assembly 20 are non-detachable, that is, integrally formed.

[0031] The atomizer 10 includes a susceptor 11 and a liquid storage cavity A.

[0032] The liquid storage cavity A is configured to store an atomizable liquid substrate. Preferably, the liquid substrate includes a tobacco-containing material, and the tobacco-containing material includes volatile tobacco flavor compounds released from the liquid substrate during heating. Alternatively or in addition, the liquid substrate may include a non-tobacco material. The liquid substrate may include water, ethanol or another solvent, a plant extract, a nicotine solution, and a natural or artificial flavoring agent. Preferably, the liquid substrate further includes an aerosol forming agent. An instance of a suitable aerosol forming agent is glycerol and propylene glycol.

[0033] The susceptor 11 is configured to be capable of being penetrated by the varying magnetic field to generate heat, to heat the liquid substrate from the liquid storage cavity A and generate an inhalable aerosol.

[0034] The susceptor 11 includes a base body and an electrical conductor bonded to at least part of the base body, and the base body is made of a material that is magnetically conductive and not electrically conductive. The base body can twist or gather at least some of magnetic lines of force in the magnetic field to increase a magnetic flux passing through the electrical conductor, thereby increasing an eddy current loss of the electrical conductor, i.e., generating more heat. Heating efficiency of the susceptor is improved, and user experience is improved. Since the base body is made of a material that is magnetically conductive and not electrically conductive, there is an extremely small amount of heat generated by the base body due to the eddy current effect under the penetration action of the magnetic field.

[0035] The susceptor including the base body made of a material that is magnetically conductive and not electrically conductive and the electrical conductor bonded to at least part of the base body has heating efficiency greater than that of a susceptor constructed and formed only by an electrical conductor. To better understand this application, the following provides verification and description from different perspectives: Before this solution is used, as shown in the following table, each susceptor (in which heat generation may be caused by an eddy current and / or a magnetic hysteresis loss) is placed in a spiral induction coil. In the mass column of the table, Air indicates that the spiral induction coil is in a no-load state, there is no susceptor coupled to the induction coil, a quantity of turns of the coil is approximately 9, and a length of the coil is approximately 10 mm. Specific data indicates that the susceptor with the mass is placed in the spiral induction coil for coupling. For example, "4 mg" indicates that a 4 mg susceptor is placed in the spiral induction coil for coupling. Conversion efficiency is calculated by using the following formula: η = 1 - Rs(Air) / Rs(mg), where Rs(Air) denotes resonant resistance of a resonant circuit in a no-load state, Rs(mg) denotes resonant resistance of the resonant circuit in a load state, that is, in a coupled state of the susceptor and the induction coil. For example, when the mass of the susceptor is 4 mg, the conversion efficiency of the susceptor is η = 1 - 25.8 / 41.8 = 38.3%. Frequency f (MHz)MassInductance L (nH)Quality factor QResonant resistance Rs (mΩ)Resonant resistance Z (Ω)Conversion efficiency η (%)1.1Air537.214425.83.738.34 mg537.788.741.83.711.1Air562.116117.73.8857.044.8 mg560.293.841.23.871.3Air552.2234.519.24.573.447.5 mg551.162.372.34.51.1Air537.7220.916.73.7175.047.5 mg537.755.566.93.910.63Air644.815712.62.158012 mg548.634.363.12.17

[0036] It may be learned from the table that greater mass of the susceptor indicates higher conversion efficiency thereof. However, a problem that follows is that, in a case where energy provided to the susceptor is the same, greater mass of the susceptor indicates a slower temperature rise rate or decrease rate of the susceptor and higher power that needs to be provided to the susceptor to reach a target temperature of the susceptor, resulting in a decrease in endurance of a battery cell. During continuous puffing, an excessively high cumulative temperature easily affects the mouthfeel of the puffing. On the contrary, smaller mass of the susceptor indicates that a smaller space is occupied by the susceptor in the magnetic field, and less magnetic lines of force passing through the susceptor, resulting in lower conversion efficiency η of the susceptor. There may be an excessively small amount of aerosol (TPM) generated when the susceptor heats the liquid substrate, or no smoke is generated during aeration in an early stage of puffing. However, smaller mass of the susceptor indicates a higher temperature rise or decrease rate of the susceptor under a same energy supply condition, and a more concentrated heat source, thereby avoiding affecting the mouthfeel of the puffing due to an excessively high cumulative temperature during continuous puffing. The objective of this application is to balance the technical problems in the foregoing two aspects to provide a novel solution, which can improve the conversion efficiency η of the susceptor, thereby reducing power consumption of the susceptor, and can increase a temperature rise rate of the susceptor, so that an output amount of aerosol (TPM) is stabilized at a desired target.

[0037] Referring to the foregoing table, with a frequency f of 1.1 MHz as an example, the conversion efficiency η of a susceptor having mass of 7.5 mg coupled in a magnetic field is 75.04%, and the susceptor needs approximately 10 W of power to increase the temperature of the liquid substrate to a temperature required for aeration, for example, 250°C, within 0.5s. When power required by a heating assembly (the susceptor + the spiral induction coil) is approximately 10 W / 0. 7504 = 13.33 W, and the spiral induction coil has a current of 13.33 W / 66.9 mΩ = 14.1 A and a resonance voltage of approximately 150 V, required input power is approximately 23.5 W, and the conversion efficiency of operating power of the susceptor compared to input power is only 10 W / 23. 5 W ≈ 43%.

[0038] After the solutions in the following embodiments of this application are used, a magnetic field is gathered or twisted by using the base body, so as to increase the magnetic flux passing through the electrical conductor, and more magnetic lines of force generated by the spiral induction coil can be coupled to the electrical conductor, thereby greatly improving conversion efficiency η of the susceptor, reducing power provided to the resonant circuit, and improving the endurance of the battery cell. In addition, in the solution of this embodiment, an electrical conductor with smaller mass may be used, so that the temperature of the susceptor rises or decreases more rapidly under a same energy supply condition, a heat source is more concentrated, and an aeration speed is higher, thereby avoiding affecting the mouthfeel of the puffing due to an excessively high cumulative temperature during continuous puffing.

[0039] With data from the following table as an example, when an electrical conductor with mass of 4 mg and a base body having a length of approximately 10 mm were combined to form a susceptor, conversion efficiency η of the susceptor could be improved to 91.8%. In actual measurement upon mounting, when the temperature of the liquid substrate was increased to a temperature required for aeration, 250°C, within 0.5s, input power was only 9.237 W (constant power output), and a TPM value was stabilized between 6 and 7. In some examples, the electrical conductor may be bonded to the base body through etching, coating, or deposition. The electrical conductor may alternatively be combined on the base body in a mounting manner or the base body may be directly or indirectly mounted on the electrical conductor. In an optional example, the electrical conductor is located in a middle area of the base body in a length direction (a direction of magnetic lines of force), and is spaced apart from two ends of the electrical conductor by a certain distance. In a proper example, the base body is arranged to be surrounded by the electrical conductor or the base body surrounds a periphery of a local surface of the electrical conductor. In some other examples, the base body may be in contact or non-contact with the electrical conductor. For example, the base body may be in non-contact with the electrical conductor. This reduces heat transfer from the electrical conductor to the base body, so as to improve a temperature rise rate of the electrical conductor. Frequency f (MHz)MassInductance L (nH)Quality factor QResonant resistance Rs (mΩ)Resonant resistance Z (Ω)Conversion efficiency η (%)1.1Air549.59184.1820.63.79891.84 mg634.2317.5250.54.39

[0040] In an example, the mass of the electrical conductor ranges from 1 mg to 15 mg, preferably 1 mg to 12 mg, preferably 1 mg to 10 mg, preferably 1 mg to 9 mg, preferably 1 mg to 8 mg; and in a specific example, the mass may be 2 mg, 4 mg, 6 mg, 8 mg, 8.5 mg, or the like.

[0041] In an example, the electrical conductor is bonded to part of the base body; and preferably, the electrical conductor is bonded to part of a surface of the base body.

[0042] Due to the improvement of the heating efficiency, a volume of the electrical conductor can be smaller, and the mass thereof can be smaller. This, on one hand, facilitates more concentration of heat, and on the other hand, can reduce a power loss of the electronic atomization device 100, thereby improving the endurance.

[0043] Further, since the heat is concentrated in an electrical conductor mounting area of the base body, other areas of the base body have less heat than the electrical conductor mounting area. Therefore, the temperature difference between different areas of the base body facilitates the aeration of different components in the liquid substrate, thereby improving puffing experience of a user.

[0044] Further, the surface of the electrical conductor may be coated with a first protective layer, and the first protective layer may be made of glass, ceramics, or an inert metal. At least the corrosion of the electrical conductor can be avoided by using a first retention layer.

[0045] In an example, the electrical conductor is paramagnetic. In this case, heat generation in the electrical conductor is caused only by the eddy current. Certainly, the electrical conductor may alternatively be magnetic, and heat may alternatively be generated in the electrical conductor by the magnetic hysteresis loss.

[0046] In an example, the electrical conductor includes at least one of stainless steel, aluminum, and bronze. Preferably, the electrical conductor is made of a stainless steel material. The stainless steel has a relatively small resistivity, and allows a relatively large current to pass through, thereby improving the heating efficiency of the susceptor.

[0047] In an example, the electrical conductor is bonded to at least part of the base body through at least one of etching, coating, plating, deposition, encapsulation, or direct mounting.

[0048] In an example, the electrical conductor includes an electrically conductive trace bonded to at least part of the base body. The electrically conductive trace may be an electrically conductive line meandering on the base body. Alternatively, the electrically conductive trace may be a mesh-like conductive grid. It may be understood that, it is also feasible that the electrical conductor is a continuous body bonded to at least part of the base body. The continuous body means that there is no mesh-like structure.

[0049] Further, at least part of the surface of the base body may be coated with a second protective layer, and the second protective layer may be made of glass, ceramics, or an inert metal. By using the second protective layer, the base body can be prevented from coming into contact with the liquid substrate, thereby preventing a harmful substance in the base body from being released to the liquid substrate, and improving safety of the liquid substrate.

[0050] In an example, the base body includes a ferromagnetic or ferrimagnetic material. The magnetic or ferrimagnetic material can make the magnetic permeability of the base body relatively high, which increases the magnetic flux of the electrical conductor.

[0051] In an example, the base body includes at least one of manganese zinc ferrite, manganese magnesium ferrite, nickel zinc ferrite, or cobalt zinc barium ferrite.

[0052] In an example, since the base body is not electrically conductive, heat generation in the base body (excluding heat transferred from the electrical conductor to the base body) is caused only by the magnetic hysteresis loss. When a Curie temperature of the base body is reached, the heat generation in the base body is completely stopped.

[0053] The temperature of the susceptor can be controlled by causing the Curie temperature of the base body to correspond to a preset operating temperature of the electronic atomization device 100. Generally, the Curie temperature of the material of the base body ranges from 150°C to 400°C, or 150°C to 380°C, or 150°C to 360°C, or 150°C to 300°C, or 150°C to 280°C, or 200°C to 280°C.

[0054] In an example, the base body is configured to being capable of sucking the liquid substrate in the liquid storage cavity A and transfer the sucked liquid substrate to the electrical conductor. For example, the base body is constructed as a porous structure. The liquid substrate is sucked through capillary pores in the base body, and the sucked liquid substrate is transferred to the electrical conductor. In this case, the base body integrates a plurality of functions, and the susceptor 11 can be in direct contact with the liquid substrate, so as to evaporate the liquid substrate by releasing heat.

[0055] In an example, the electronic atomization device 100 further includes a liquid transfer unit configured to transfer the liquid substrate to the susceptor.

[0056] The susceptor is arranged on a surface of the liquid transfer unit or at least partially buried in the liquid transfer unit.

[0057] The liquid transfer unit may be made of, for example, a cotton fiber, a metal fiber, a ceramic fiber, a glass fiber, or porous ceramics. The liquid substrate stored in the liquid storage cavity A may be transferred to the susceptor 11 through the capillary action.

[0058] In an example, the base body is constructed as a tubular, rod-shaped, sheet-like or plate-like structure.

[0059] The power supply assembly 20 includes a magnetic field generator 21, a circuit 22, and a battery cell 23.

[0060] The magnetic field generator 21 is configured to generate a varying magnetic field under an alternating current. The magnetic field generator 21 includes a single induction coil or a plurality of induction coils. The induction coil or the plurality of susceptor coils may be in a shape that matches the susceptor. Similarly, the induction coil or the plurality of susceptor coils conform to the shape of a housing of an aerosol generating device. For example, the induction coil or the plurality of induction coils may each be a spiral coil or a flat spiral coil.

[0061] The circuit 22 can control overall operations of the electronic atomization device 100. The circuit 22 not only controls operations of the battery cell 23 and the magnetic field generator 21, but also controls operations of other components in the electronic atomization device 100.

[0062] In an example, a frequency of the alternating current supplied by the circuit 22 to the magnetic field generator 21 ranges from 500 KHZ to 3 MHz; preferably, the frequency may range from 500 KHZ to 2.5 MHz; further preferably, the frequency may range from 500 KHZ to 2 MHz; further preferably, the frequency may range from 500 KHZ to 1.5 MHz; and further preferably, the frequency may range from 500 KHZ to 1 MHz. For example, the frequency of the alternating current supplied by the circuit 22 to the magnetic field generator 21 is 500 kHz, or 600 kHz, or 800 kHz, or 1.2 MHZ.

[0063] The battery cell 23 provides power for operating the electronic atomization device 100. The battery cell 23 may be a rechargeable battery cell or a disposable battery cell.

[0064] FIG. 2 is a schematic diagram of a susceptor according to an implementation of this application.

[0065] As shown in FIG. 2, the susceptor 11 includes a base body 11a and an electrical conductor 11b. The base body 11a is constructed as a circular tubular structure. The electrical conductor 11b is bonded to an outer side wall of the base body 11a. An axial length of the electrical conductor 11b is smaller than that of the base body 11a.

[0066] The base body 11a is not electrically conductive. The base body 11a is made of manganese zinc ferrite. An initial magnetic permeability of the manganese zinc ferrite is approximately 3000 H / m, and a maximum magnetic permeability thereof is approximately 6000 H / m. The electrical conductor 11b is made of a stainless steel material, and is preferably made of SUS430 stainless steel. A resistivity of the electrical conductor 11b is far less than that of the base body 11a (a resistivity of the manganese zinc ferrite is approximately 5E + 07 µQ·cm, and a resistivity of the SUS430 stainless steel is approximately 0.6 µQ·cm).

[0067] FIG. 3 is a schematic diagram of another susceptor according to an implementation of this application. Different from the example in FIG. 2, in the example in FIG. 3, an electrical conductor 11b is a discontinuous body, and the electrical conductor 11b has meshes.

[0068] FIG. 4 is a schematic diagram of still another susceptor according to an implementation of this application. Different from the example in FIG. 2, in the example in FIG. 4, a base body 11a is constructed as a sheet-like or plate-like structure.

[0069] FIG. 5 is a schematic diagram of yet another susceptor according to an implementation of this application. Different from the example in FIG. 4, in the example in FIG. 5, a base body 11a is constructed such that in an extending direction from an upper end of the base body 11a to a lower end of the base body 11a, a side edge of the base body 11a is approximately in an arc shape. An upper surface and a lower surface of the base body 11a are each a continuous surface, and the continuous surface is a complete surface that is uninterrupted or has no groove or hole. The electrical conductor 11b is bonded to the upper surface and / or the lower surface of the base body 11a, and is arranged at a middle part of the base body 11a.

[0070] Width dimensions of the upper end and the lower end of the base body 11a are greater than a width dimension of the middle part of the base body 11a. Specifically, the width dimension of the upper end of the base body 11a is d1, the width dimension of the middle part of the base body 11a is d2, the width dimension of the lower end of the base body 11a is d3, and d1 and d3 are both greater than d2. In a preferred implementation, d1 is the same as d3. d2 is one-third to two-thirds of d1 (or d3). Preferably, d2 is half of d1 (or d3). d2 ranges from 0.1 mm to 5 mm, preferably 0.1 mm to 4 mm, preferably 0.1 mm to 2 mm, preferably 0.5 mm to 2 mm, and may be, in a specific example, 0.7 mm. A length dimension of the base body 11a ranges from 1 mm to 15 mm, preferably 1 mm to 12 mm, preferably 1 mm to 10 mm, preferably 2 mm to 10 mm, and may be, in a specific example, 6 mm. A thickness of the base body 11a ranges from 0.02 mm to 0.15 mm, preferably 0.02 mm to 0.12 mm, preferably 0.02 mm to 0.1 mm, preferably 0.04 mm to 0.1 mm, and preferably 0.06 mm to 0.1 mm.

[0071] The base body 11a is in such a shape, so that on one hand, gathering of magnetic lines of force in the middle part of the susceptor is increased, thereby increasing a current density on the electrical conductor 11b located at the part. During operation of the susceptor, the current density at the middle part is greater than current densities at two ends, so that the temperature rise rate of the middle part of the susceptor is greater than those at the two ends. In this way, heat generated by the susceptor is more concentrated, which reduces energy consumed for the temperature of the susceptor to rise to a desired aeration temperature. On the other hand, such a special-shaped base body 11a can reduce the volume and mass of the electrical conductor 11b, so that less energy is needed for the susceptor to reach the aeration temperature, thereby improving aeration efficiency.

[0072] It should be noted that, the specification of this application and the accompanying drawings thereof illustrate preferred embodiments of this application. However, this application can be implemented in various different forms, and is not limited to the embodiments described in this specification. These embodiments are not intended to be an additional limitation on the content of this application, and are described for the purpose of providing a more thorough and comprehensive understanding of the disclosure of this application. Moreover, the foregoing technical features may further be combined to form various embodiments not listed above, and all such embodiments shall be construed as falling within the scope of the specification of this application. Further, a person of ordinary skill in the art may make improvements and variations according to the foregoing descriptions, and such improvements and variations shall all fall within the protection scope of the appended claims of this application.

Examples

Embodiment Construction

[0025]For ease of understanding of this application, this application is described below in more detail with reference to accompanying drawings and specific implementations. It should be noted that, when a component is expressed as "being fixed to" another component, the component may be directly on the another component, or one or more intermediate components may exist between the component and the another component. When a component is expressed as "being connected to" another component, the component may be directly connected to the another component, or one or more intermediate components may exist between the component and the another component. The terms "upper", "lower", "left", "right", "inner", "outer", and similar expressions used in this specification are merely used for an illustrative purpose.

[0026]Unless otherwise defined, meanings of all technical and scientific terms used in this specification are the same as those usually understood by a person skilled in the techni...

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese Patent Application No. 202310903831.9, filed with the China National Intellectual Property Administration on July 20, 2023 and entitled "SUSCEPTOR AND ELECTRONIC ATOMIZATION DEVICE", which is incorporated herein by reference in its entirety.TECHNICAL FIELD

[0002] This application relates to the field of electronic atomization technologies, and in particular, to a susceptor and an electronic atomization device.BACKGROUND

[0003] Electronic atomization devices for heating an aerosol-forming substrate based on induction are generally known from the prior art. The devices may each include an induction source configured to generate an alternating electromagnetic field. The alternating electromagnetic field causes at least one of a heat-generating eddy current or a magnetic hysteresis loss in a susceptor. The susceptor thus heated is in thermal proximity to the aerosol-forming substrate, and the aerosol-forming substrate, when heated, can release volatile compounds to form an aerosol. The existing electronic atomization device has the problem that heating efficiency of the susceptor is low.SUMMARY

[0004] This application provides a susceptor and an electronic atomization device, to improve heating efficiency of the susceptor.

[0005] An aspect of this application provides an electronic atomization device, including: a liquid storage cavity, configured to store an atomizable liquid substrate; a magnetic field generator, configured to generate a varying magnetic field; and a susceptor, configured to heat the liquid substrate from the liquid storage cavity to generate an aerosol, where the susceptor includes a base body made of a material that is magnetically conductive and not electrically conductive and an electrical conductor bonded to at least part of the base body, the base body is configured to be capable of twisting or gathering at least some of magnetic lines of force in the magnetic field such that the some of magnetic lines of force can pass through the electrical conductor, and the electrical conductor is configured to be capable of being penetrated by the varying magnetic field to generate heat.

[0006] In an example, the electrical conductor is bonded to part of a surface of the base body.

[0007] In an example, in a length direction of the base body, the electrical conductor is located at a center of the base body.

[0008] In an example, the electrical conductor surrounds a portion of an outer surface of the base body.

[0009] In an example, the electrical conductor is paramagnetic.

[0010] In an example, the electrical conductor is bonded to the base body through at least one of etching, coating, plating, deposition, encapsulation, or mounting.

[0011] In an example, the electrical conductor includes an electrically conductive trace bonded to at least part of a surface of the base body.

[0012] In an example, mass of the electrical conductor ranges from 1 mg to 9 mg.

[0013] In an example, a surface of the base body is covered with a protective layer to isolate the base body from the liquid substrate.

[0014] In an example, the base body includes a ferromagnetic or ferrimagnetic material.

[0015] In an example, the base body includes at least one of manganese zinc ferrite, manganese magnesium ferrite, nickel zinc ferrite, or cobalt zinc barium ferrite.

[0016] In an example, a Curie temperature of the material of the base body ranges from 150°C to 400°C.

[0017] In an example, the base body is configured to suck the liquid substrate in the liquid storage cavity and transfer the sucked liquid substrate to the electrical conductor.

[0018] In an example, the base body is constructed as a tubular, rod-shaped, sheet-like or plate-like structure.

[0019] In an example, the electronic atomization device further includes a liquid transfer unit configured to transfer the liquid substrate to the susceptor, where the susceptor is arranged on a surface of the liquid transfer unit or at least partially buried in the liquid transfer unit.

[0020] In an example, the magnetic field generator includes an induction coil, and an operating frequency provided to the induction coil ranges from 100 kHz to 3 MHz.

[0021] Another aspect of this application provides a susceptor for an electronic atomization device. The susceptor includes a base body and an electrical conductor bonded to at least part of the base body, where the base body is made of a material that is magnetically conductive and not electrically conductive, the base body is configured to be capable of twisting or gathering at least some of magnetic lines of force in a magnetic field such that the some of magnetic lines of force can pass through the electrical conductor, and the electrical conductor is configured to be capable of being penetrated by the magnetic lines of force to generate heat.

[0022] Another aspect of this application provides an electronic atomization device, including: a liquid storage cavity, configured to store an atomizable liquid substrate; a magnetic field generator, configured to generate a varying magnetic field; and a susceptor, configured to heat the liquid substrate from the liquid storage cavity to generate an aerosol, where the susceptor includes a base body and an electrical conductor bonded to at least part of the base body; the electrical conductor is configured to be capable of being penetrated by the varying magnetic field to generate heat, and mass of the electrical conductor ranges from 1 mg to 9 mg.

[0023] According to the susceptor and the electronic atomization device provided above, the base body is made of a material that is magnetically conductive and not electrically conductive, and the electrical conductor is bonded to at least part of the base body; the base body can increase a magnetic flux of the electrical conductor, thereby increasing an eddy current loss of the electrical conductor, i.e., generating more heat; the heating efficiency of the susceptor is improved, and user experience is improved.BRIEF DESCRIPTION OF THE DRAWINGS

[0024] One or more embodiments are exemplarily described with reference to corresponding figures in the accompanying drawings, and these exemplary descriptions do not constitute a limitation on the embodiments. Components in the accompanying drawings that have same reference numerals are represented as similar components, and unless otherwise specified, the figures in the accompanying drawings are not drawn to scale. FIG. 1 is a schematic diagram of an electronic atomization device according to an implementation of this application; FIG. 2 is a schematic diagram of a susceptor according to an implementation of this application; FIG. 3 is a schematic diagram of another susceptor according to an implementation of this application; FIG. 4 is a schematic diagram of still another susceptor according to an implementation of this application; and FIG. 5 is a schematic diagram of yet another susceptor according to an implementation of this application. DETAILED DESCRIPTION

[0025] For ease of understanding of this application, this application is described below in more detail with reference to accompanying drawings and specific implementations. It should be noted that, when a component is expressed as "being fixed to" another component, the component may be directly on the another component, or one or more intermediate components may exist between the component and the another component. When a component is expressed as "being connected to" another component, the component may be directly connected to the another component, or one or more intermediate components may exist between the component and the another component. The terms "upper", "lower", "left", "right", "inner", "outer", and similar expressions used in this specification are merely used for an illustrative purpose.

[0026] Unless otherwise defined, meanings of all technical and scientific terms used in this specification are the same as those usually understood by a person skilled in the technical field to which this application belongs. The terms used in this specification of this application are merely intended to describe objectives of the specific embodiments, and are not intended to limit this application. The term "and / or" used in this specification includes any or all combinations of one or more related listed items.

[0027] FIG. 1 is a schematic diagram of an electronic atomization device according to an implementation of this application.

[0028] As shown in FIG. 1, an electronic atomization device 100 includes an atomizer 10 and a power supply assembly 20.

[0029] In an example, the atomizer 10 is removably connected to the power supply assembly 20, and the atomizer 10 may be in snap-fit connection, magnetic connection, or the like to the power supply assembly 20.

[0030] In an example, the atomizer 10 and the power supply assembly 20 are non-detachable, that is, integrally formed.

[0031] The atomizer 10 includes a susceptor 11 and a liquid storage cavity A.

[0032] The liquid storage cavity A is configured to store an atomizable liquid substrate. Preferably, the liquid substrate includes a tobacco-containing material, and the tobacco-containing material includes volatile tobacco flavor compounds released from the liquid substrate during heating. Alternatively or in addition, the liquid substrate may include a non-tobacco material. The liquid substrate may include water, ethanol or another solvent, a plant extract, a nicotine solution, and a natural or artificial flavoring agent. Preferably, the liquid substrate further includes an aerosol forming agent. An instance of a suitable aerosol forming agent is glycerol and propylene glycol.

[0033] The susceptor 11 is configured to be capable of being penetrated by the varying magnetic field to generate heat, to heat the liquid substrate from the liquid storage cavity A and generate an inhalable aerosol.

[0034] The susceptor 11 includes a base body and an electrical conductor bonded to at least part of the base body, and the base body is made of a material that is magnetically conductive and not electrically conductive. The base body can twist or gather at least some of magnetic lines of force in the magnetic field to increase a magnetic flux passing through the electrical conductor, thereby increasing an eddy current loss of the electrical conductor, i.e., generating more heat. Heating efficiency of the susceptor is improved, and user experience is improved. Since the base body is made of a material that is magnetically conductive and not electrically conductive, there is an extremely small amount of heat generated by the base body due to the eddy current effect under the penetration action of the magnetic field.

[0035] The susceptor including the base body made of a material that is magnetically conductive and not electrically conductive and the electrical conductor bonded to at least part of the base body has heating efficiency greater than that of a susceptor constructed and formed only by an electrical conductor. To better understand this application, the following provides verification and description from different perspectives: Before this solution is used, as shown in the following table, each susceptor (in which heat generation may be caused by an eddy current and / or a magnetic hysteresis loss) is placed in a spiral induction coil. In the mass column of the table, Air indicates that the spiral induction coil is in a no-load state, there is no susceptor coupled to the induction coil, a quantity of turns of the coil is approximately 9, and a length of the coil is approximately 10 mm. Specific data indicates that the susceptor with the mass is placed in the spiral induction coil for coupling. For example, "4 mg" indicates that a 4 mg susceptor is placed in the spiral induction coil for coupling. Conversion efficiency is calculated by using the following formula: η = 1 - Rs(Air) / Rs(mg), where Rs(Air) denotes resonant resistance of a resonant circuit in a no-load state, Rs(mg) denotes resonant resistance of the resonant circuit in a load state, that is, in a coupled state of the susceptor and the induction coil. For example, when the mass of the susceptor is 4 mg, the conversion efficiency of the susceptor is η = 1 - 25.8 / 41.8 = 38.3%. Frequency f (MHz)MassInductance L (nH)Quality factor QResonant resistance Rs (mΩ)Resonant resistance Z (Ω)Conversion efficiency η (%)1.1Air537.214425.83.738.34 mg537.788.741.83.711.1Air562.116117.73.8857.044.8 mg560.293.841.23.871.3Air552.2234.519.24.573.447.5 mg551.162.372.34.51.1Air537.7220.916.73.7175.047.5 mg537.755.566.93.910.63Air644.815712.62.158012 mg548.634.363.12.17

[0036] It may be learned from the table that greater mass of the susceptor indicates higher conversion efficiency thereof. However, a problem that follows is that, in a case where energy provided to the susceptor is the same, greater mass of the susceptor indicates a slower temperature rise rate or decrease rate of the susceptor and higher power that needs to be provided to the susceptor to reach a target temperature of the susceptor, resulting in a decrease in endurance of a battery cell. During continuous puffing, an excessively high cumulative temperature easily affects the mouthfeel of the puffing. On the contrary, smaller mass of the susceptor indicates that a smaller space is occupied by the susceptor in the magnetic field, and less magnetic lines of force passing through the susceptor, resulting in lower conversion efficiency η of the susceptor. There may be an excessively small amount of aerosol (TPM) generated when the susceptor heats the liquid substrate, or no smoke is generated during aeration in an early stage of puffing. However, smaller mass of the susceptor indicates a higher temperature rise or decrease rate of the susceptor under a same energy supply condition, and a more concentrated heat source, thereby avoiding affecting the mouthfeel of the puffing due to an excessively high cumulative temperature during continuous puffing. The objective of this application is to balance the technical problems in the foregoing two aspects to provide a novel solution, which can improve the conversion efficiency η of the susceptor, thereby reducing power consumption of the susceptor, and can increase a temperature rise rate of the susceptor, so that an output amount of aerosol (TPM) is stabilized at a desired target.

[0037] Referring to the foregoing table, with a frequency f of 1.1 MHz as an example, the conversion efficiency η of a susceptor having mass of 7.5 mg coupled in a magnetic field is 75.04%, and the susceptor needs approximately 10 W of power to increase the temperature of the liquid substrate to a temperature required for aeration, for example, 250°C, within 0.5s. When power required by a heating assembly (the susceptor + the spiral induction coil) is approximately 10 W / 0. 7504 = 13.33 W, and the spiral induction coil has a current of 13.33 W / 66.9 mΩ = 14.1 A and a resonance voltage of approximately 150 V, required input power is approximately 23.5 W, and the conversion efficiency of operating power of the susceptor compared to input power is only 10 W / 23. 5 W ≈ 43%.

[0038] After the solutions in the following embodiments of this application are used, a magnetic field is gathered or twisted by using the base body, so as to increase the magnetic flux passing through the electrical conductor, and more magnetic lines of force generated by the spiral induction coil can be coupled to the electrical conductor, thereby greatly improving conversion efficiency η of the susceptor, reducing power provided to the resonant circuit, and improving the endurance of the battery cell. In addition, in the solution of this embodiment, an electrical conductor with smaller mass may be used, so that the temperature of the susceptor rises or decreases more rapidly under a same energy supply condition, a heat source is more concentrated, and an aeration speed is higher, thereby avoiding affecting the mouthfeel of the puffing due to an excessively high cumulative temperature during continuous puffing.

[0039] With data from the following table as an example, when an electrical conductor with mass of 4 mg and a base body having a length of approximately 10 mm were combined to form a susceptor, conversion efficiency η of the susceptor could be improved to 91.8%. In actual measurement upon mounting, when the temperature of the liquid substrate was increased to a temperature required for aeration, 250°C, within 0.5s, input power was only 9.237 W (constant power output), and a TPM value was stabilized between 6 and 7. In some examples, the electrical conductor may be bonded to the base body through etching, coating, or deposition. The electrical conductor may alternatively be combined on the base body in a mounting manner or the base body may be directly or indirectly mounted on the electrical conductor. In an optional example, the electrical conductor is located in a middle area of the base body in a length direction (a direction of magnetic lines of force), and is spaced apart from two ends of the electrical conductor by a certain distance. In a proper example, the base body is arranged to be surrounded by the electrical conductor or the base body surrounds a periphery of a local surface of the electrical conductor. In some other examples, the base body may be in contact or non-contact with the electrical conductor. For example, the base body may be in non-contact with the electrical conductor. This reduces heat transfer from the electrical conductor to the base body, so as to improve a temperature rise rate of the electrical conductor. Frequency f (MHz)MassInductance L (nH)Quality factor QResonant resistance Rs (mΩ)Resonant resistance Z (Ω)Conversion efficiency η (%)1.1Air549.59184.1820.63.79891.84 mg634.2317.5250.54.39

[0040] In an example, the mass of the electrical conductor ranges from 1 mg to 15 mg, preferably 1 mg to 12 mg, preferably 1 mg to 10 mg, preferably 1 mg to 9 mg, preferably 1 mg to 8 mg; and in a specific example, the mass may be 2 mg, 4 mg, 6 mg, 8 mg, 8.5 mg, or the like.

[0041] In an example, the electrical conductor is bonded to part of the base body; and preferably, the electrical conductor is bonded to part of a surface of the base body.

[0042] Due to the improvement of the heating efficiency, a volume of the electrical conductor can be smaller, and the mass thereof can be smaller. This, on one hand, facilitates more concentration of heat, and on the other hand, can reduce a power loss of the electronic atomization device 100, thereby improving the endurance.

[0043] Further, since the heat is concentrated in an electrical conductor mounting area of the base body, other areas of the base body have less heat than the electrical conductor mounting area. Therefore, the temperature difference between different areas of the base body facilitates the aeration of different components in the liquid substrate, thereby improving puffing experience of a user.

[0044] Further, the surface of the electrical conductor may be coated with a first protective layer, and the first protective layer may be made of glass, ceramics, or an inert metal. At least the corrosion of the electrical conductor can be avoided by using a first retention layer.

[0045] In an example, the electrical conductor is paramagnetic. In this case, heat generation in the electrical conductor is caused only by the eddy current. Certainly, the electrical conductor may alternatively be magnetic, and heat may alternatively be generated in the electrical conductor by the magnetic hysteresis loss.

[0046] In an example, the electrical conductor includes at least one of stainless steel, aluminum, and bronze. Preferably, the electrical conductor is made of a stainless steel material. The stainless steel has a relatively small resistivity, and allows a relatively large current to pass through, thereby improving the heating efficiency of the susceptor.

[0047] In an example, the electrical conductor is bonded to at least part of the base body through at least one of etching, coating, plating, deposition, encapsulation, or direct mounting.

[0048] In an example, the electrical conductor includes an electrically conductive trace bonded to at least part of the base body. The electrically conductive trace may be an electrically conductive line meandering on the base body. Alternatively, the electrically conductive trace may be a mesh-like conductive grid. It may be understood that, it is also feasible that the electrical conductor is a continuous body bonded to at least part of the base body. The continuous body means that there is no mesh-like structure.

[0049] Further, at least part of the surface of the base body may be coated with a second protective layer, and the second protective layer may be made of glass, ceramics, or an inert metal. By using the second protective layer, the base body can be prevented from coming into contact with the liquid substrate, thereby preventing a harmful substance in the base body from being released to the liquid substrate, and improving safety of the liquid substrate.

[0050] In an example, the base body includes a ferromagnetic or ferrimagnetic material. The magnetic or ferrimagnetic material can make the magnetic permeability of the base body relatively high, which increases the magnetic flux of the electrical conductor.

[0051] In an example, the base body includes at least one of manganese zinc ferrite, manganese magnesium ferrite, nickel zinc ferrite, or cobalt zinc barium ferrite.

[0052] In an example, since the base body is not electrically conductive, heat generation in the base body (excluding heat transferred from the electrical conductor to the base body) is caused only by the magnetic hysteresis loss. When a Curie temperature of the base body is reached, the heat generation in the base body is completely stopped.

[0053] The temperature of the susceptor can be controlled by causing the Curie temperature of the base body to correspond to a preset operating temperature of the electronic atomization device 100. Generally, the Curie temperature of the material of the base body ranges from 150°C to 400°C, or 150°C to 380°C, or 150°C to 360°C, or 150°C to 300°C, or 150°C to 280°C, or 200°C to 280°C.

[0054] In an example, the base body is configured to being capable of sucking the liquid substrate in the liquid storage cavity A and transfer the sucked liquid substrate to the electrical conductor. For example, the base body is constructed as a porous structure. The liquid substrate is sucked through capillary pores in the base body, and the sucked liquid substrate is transferred to the electrical conductor. In this case, the base body integrates a plurality of functions, and the susceptor 11 can be in direct contact with the liquid substrate, so as to evaporate the liquid substrate by releasing heat.

[0055] In an example, the electronic atomization device 100 further includes a liquid transfer unit configured to transfer the liquid substrate to the susceptor.

[0056] The susceptor is arranged on a surface of the liquid transfer unit or at least partially buried in the liquid transfer unit.

[0057] The liquid transfer unit may be made of, for example, a cotton fiber, a metal fiber, a ceramic fiber, a glass fiber, or porous ceramics. The liquid substrate stored in the liquid storage cavity A may be transferred to the susceptor 11 through the capillary action.

[0058] In an example, the base body is constructed as a tubular, rod-shaped, sheet-like or plate-like structure.

[0059] The power supply assembly 20 includes a magnetic field generator 21, a circuit 22, and a battery cell 23.

[0060] The magnetic field generator 21 is configured to generate a varying magnetic field under an alternating current. The magnetic field generator 21 includes a single induction coil or a plurality of induction coils. The induction coil or the plurality of susceptor coils may be in a shape that matches the susceptor. Similarly, the induction coil or the plurality of susceptor coils conform to the shape of a housing of an aerosol generating device. For example, the induction coil or the plurality of induction coils may each be a spiral coil or a flat spiral coil.

[0061] The circuit 22 can control overall operations of the electronic atomization device 100. The circuit 22 not only controls operations of the battery cell 23 and the magnetic field generator 21, but also controls operations of other components in the electronic atomization device 100.

[0062] In an example, a frequency of the alternating current supplied by the circuit 22 to the magnetic field generator 21 ranges from 500 KHZ to 3 MHz; preferably, the frequency may range from 500 KHZ to 2.5 MHz; further preferably, the frequency may range from 500 KHZ to 2 MHz; further preferably, the frequency may range from 500 KHZ to 1.5 MHz; and further preferably, the frequency may range from 500 KHZ to 1 MHz. For example, the frequency of the alternating current supplied by the circuit 22 to the magnetic field generator 21 is 500 kHz, or 600 kHz, or 800 kHz, or 1.2 MHZ.

[0063] The battery cell 23 provides power for operating the electronic atomization device 100. The battery cell 23 may be a rechargeable battery cell or a disposable battery cell.

[0064] FIG. 2 is a schematic diagram of a susceptor according to an implementation of this application.

[0065] As shown in FIG. 2, the susceptor 11 includes a base body 11a and an electrical conductor 11b. The base body 11a is constructed as a circular tubular structure. The electrical conductor 11b is bonded to an outer side wall of the base body 11a. An axial length of the electrical conductor 11b is smaller than that of the base body 11a.

[0066] The base body 11a is not electrically conductive. The base body 11a is made of manganese zinc ferrite. An initial magnetic permeability of the manganese zinc ferrite is approximately 3000 H / m, and a maximum magnetic permeability thereof is approximately 6000 H / m. The electrical conductor 11b is made of a stainless steel material, and is preferably made of SUS430 stainless steel. A resistivity of the electrical conductor 11b is far less than that of the base body 11a (a resistivity of the manganese zinc ferrite is approximately 5E + 07 µQ·cm, and a resistivity of the SUS430 stainless steel is approximately 0.6 µQ·cm).

[0067] FIG. 3 is a schematic diagram of another susceptor according to an implementation of this application. Different from the example in FIG. 2, in the example in FIG. 3, an electrical conductor 11b is a discontinuous body, and the electrical conductor 11b has meshes.

[0068] FIG. 4 is a schematic diagram of still another susceptor according to an implementation of this application. Different from the example in FIG. 2, in the example in FIG. 4, a base body 11a is constructed as a sheet-like or plate-like structure.

[0069] FIG. 5 is a schematic diagram of yet another susceptor according to an implementation of this application. Different from the example in FIG. 4, in the example in FIG. 5, a base body 11a is constructed such that in an extending direction from an upper end of the base body 11a to a lower end of the base body 11a, a side edge of the base body 11a is approximately in an arc shape. An upper surface and a lower surface of the base body 11a are each a continuous surface, and the continuous surface is a complete surface that is uninterrupted or has no groove or hole. The electrical conductor 11b is bonded to the upper surface and / or the lower surface of the base body 11a, and is arranged at a middle part of the base body 11a.

[0070] Width dimensions of the upper end and the lower end of the base body 11a are greater than a width dimension of the middle part of the base body 11a. Specifically, the width dimension of the upper end of the base body 11a is d1, the width dimension of the middle part of the base body 11a is d2, the width dimension of the lower end of the base body 11a is d3, and d1 and d3 are both greater than d2. In a preferred implementation, d1 is the same as d3. d2 is one-third to two-thirds of d1 (or d3). Preferably, d2 is half of d1 (or d3). d2 ranges from 0.1 mm to 5 mm, preferably 0.1 mm to 4 mm, preferably 0.1 mm to 2 mm, preferably 0.5 mm to 2 mm, and may be, in a specific example, 0.7 mm. A length dimension of the base body 11a ranges from 1 mm to 15 mm, preferably 1 mm to 12 mm, preferably 1 mm to 10 mm, preferably 2 mm to 10 mm, and may be, in a specific example, 6 mm. A thickness of the base body 11a ranges from 0.02 mm to 0.15 mm, preferably 0.02 mm to 0.12 mm, preferably 0.02 mm to 0.1 mm, preferably 0.04 mm to 0.1 mm, and preferably 0.06 mm to 0.1 mm.

[0071] The base body 11a is in such a shape, so that on one hand, gathering of magnetic lines of force in the middle part of the susceptor is increased, thereby increasing a current density on the electrical conductor 11b located at the part. During operation of the susceptor, the current density at the middle part is greater than current densities at two ends, so that the temperature rise rate of the middle part of the susceptor is greater than those at the two ends. In this way, heat generated by the susceptor is more concentrated, which reduces energy consumed for the temperature of the susceptor to rise to a desired aeration temperature. On the other hand, such a special-shaped base body 11a can reduce the volume and mass of the electrical conductor 11b, so that less energy is needed for the susceptor to reach the aeration temperature, thereby improving aeration efficiency.

[0072] It should be noted that, the specification of this application and the accompanying drawings thereof illustrate preferred embodiments of this application. However, this application can be implemented in various different forms, and is not limited to the embodiments described in this specification. These embodiments are not intended to be an additional limitation on the content of this application, and are described for the purpose of providing a more thorough and comprehensive understanding of the disclosure of this application. Moreover, the foregoing technical features may further be combined to form various embodiments not listed above, and all such embodiments shall be construed as falling within the scope of the specification of this application. Further, a person of ordinary skill in the art may make improvements and variations according to the foregoing descriptions, and such improvements and variations shall all fall within the protection scope of the appended claims of this application.

Examples

Embodiment Construction

[0025]For ease of understanding of this application, this application is described below in more detail with reference to accompanying drawings and specific implementations. It should be noted that, when a component is expressed as "being fixed to" another component, the component may be directly on the another component, or one or more intermediate components may exist between the component and the another component. When a component is expressed as "being connected to" another component, the component may be directly connected to the another component, or one or more intermediate components may exist between the component and the another component. The terms "upper", "lower", "left", "right", "inner", "outer", and similar expressions used in this specification are merely used for an illustrative purpose.

[0026]Unless otherwise defined, meanings of all technical and scientific terms used in this specification are the same as those usually understood by a person skilled in the techni...

Claims

1. An electronic atomization device, comprising: a liquid storage cavity, configured to store an atomizable liquid substrate; a magnetic field generator, configured to generate a varying magnetic field; and a susceptor, configured to heat the liquid substrate from the liquid storage cavity to generate an aerosol, wherein the susceptor comprises a base body made of a material that is magnetically conductive and not electrically conductive, and an electrical conductor bonded to at least part of the base body, wherein the base body is configured to be capable of twisting or gathering at least some of magnetic lines of force in the magnetic field such that said some of magnetic lines of force pass through the electrical conductor, and the electrical conductor is configured to be capable of being penetrated by the varying magnetic field to generate heat.

2. The electronic atomization device according to claim 1, wherein the electrical conductor is bonded to part of a surface of the base body.

3. The electronic atomization device according to claim 2, wherein in a length direction of the base body, the electrical conductor is located at a center of the base body.

4. The electronic atomization device according to claim 1 or 2 or 3, wherein the electrical conductor surrounds a portion of an outer surface of the base body.

5. The electronic atomization device according to claim 1, wherein the electrical conductor is paramagnetic.

6. The electronic atomization device according to claim 1, wherein the electrical conductor is bonded to the base body through at least one of etching, coating, plating, deposition, encapsulation, or mounting.

7. The electronic atomization device according to claim 1, wherein the electrical conductor comprises an electrically conductive trace bonded to at least part of a surface of the base body.

8. The electronic atomization device according to claim 1, wherein mass of the electrical conductor ranges from 1 mg to 9 mg.

9. The electronic atomization device according to claim 1, wherein a surface of the base body is covered with a protective layer to isolate the base body from the liquid substrate.

10. The electronic atomization device according to claim 1, wherein the base body comprises a ferromagnetic or ferrimagnetic material.

11. The electronic atomization device according to claim 10, wherein the base body comprises at least one of manganese zinc ferrite, manganese magnesium ferrite, nickel zinc ferrite, or cobalt zinc barium ferrite.

12. The electronic atomization device according to claim 1, wherein a Curie temperature of the material of the base body ranges from 150°C to 400°C.

13. The electronic atomization device according to claim 1, wherein the base body is configured to suck the liquid substrate in the liquid storage cavity and transfer the sucked liquid substrate to the electrical conductor.

14. The electronic atomization device according to claim 1, wherein the base body is constructed as a tubular, rod-shaped, sheet-like or plate-like structure.

15. The electronic atomization device according to claim 1, further comprising a liquid transfer unit configured to transfer the liquid substrate to the susceptor, wherein the susceptor is arranged on a surface of the liquid transfer unit or at least partially buried in the liquid transfer unit.

16. The electronic atomization device according to claim 1, wherein the magnetic field generator comprises an induction coil, and an operating frequency provided to the induction coil ranges from 100 kHz to 3 MHz.

17. A susceptor for an electronic atomization device, comprising a base body and an electrical conductor bonded to at least part of the base body, wherein: the base body is made of a material that is magnetically conductive and not electrically conductive; the base body is configured to be capable of twisting or gathering at least some of magnetic lines of force in a magnetic field such that said some of magnetic lines of force pass through the electrical conductor; and the electrical conductor is configured to be capable of being penetrated by the magnetic lines of force to generate heat.

18. An electronic atomization device, comprising: a liquid storage cavity, configured to store an atomizable liquid substrate; a magnetic field generator, configured to generate a varying magnetic field; and a susceptor, configured to heat the liquid substrate from the liquid storage cavity to generate an aerosol, wherein the susceptor comprises a base body and an electrical conductor bonded to at least part of the base body, wherein the electrical conductor is configured to be capable of being penetrated by the varying magnetic field to generate heat, and mass of the electrical conductor ranges from 1 mg to 9 mg.

Images