Aerosol generating device

Abstract

The invention provides an aerosol generating device which comprises an induction coil and a magnetic part, and the induction coil can generate a magnetic field when powered on; the magnetic part is arranged adjacent to the induction coil and comprises a carrier and magnetic particles dispersed in the carrier, and the magnetic particles can be located in a magnetic field. The magnetic part containing the magnetic particles is arranged in the aerosol generating device, so that the recognition rate of the aerosol product through smoking set recognition operation can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of aerosol generation, and particularly relates to an aerosol generating device. Background Art

[0002] Electromagnetic induction heating of aerosol products is one of the mainstream heating methods for heat-not-burn aerosol generating devices at present. An aerosol generating device generally includes a power supply battery and an induction coil. During use, an aerosol product is inserted into a preset position of the aerosol generating device, and the battery supplies power to the induction coil to enable the induction coil to generate an alternating magnetic field. A receptor in the aerosol product can generate eddy currents in the alternating magnetic field. The eddy currents cause the atoms in the receptor to move at high speed and randomly. The atoms collide and rub against each other to generate heat energy, thereby heating the aerosol generation matrix.

[0003] In the related art, heat-not-burn aerosol generating devices on the market usually have an identification operation. During the identification operation, the magnetic excitation system of the heat-not-burn aerosol generating device identifies the magnetic strength generated by the receptor in the energized coil. When the magnetic strength generated by the receptor reaches a preset threshold, the magnetic excitation system will pass the identification operation; when the magnetic strength generated by the receptor is lower than the preset threshold, the magnetic excitation system will determine that the identification operation fails, and the aerosol product cannot be used after being inserted into the aerosol generating device.

[0004] However, during the preparation, processing, assembly, transportation of the receptor and the use by consumers, due to processing errors, assembly errors, etc., after the aerosol product is inserted into the aerosol generating device, the magnetic strength generated by the receptor in the energized coil is lower than the preset magnetic strength threshold, and the magnetic excitation system will determine that the identification operation fails. The aerosol product cannot be used after being inserted into the aerosol generating device, and the probability of the aerosol product passing the identification operation is relatively low, affecting the user experience. Summary of the Invention

[0005] An embodiment of the present application provides an aerosol generating device, aiming to solve the foregoing technical problems. The aerosol generating device includes:

[0006] An induction coil that can generate a magnetic field when energized;

[0007] A magnetic member that is disposed adjacent to the induction coil. The magnetic member includes a carrier and magnetic particles dispersed in the carrier, and the magnetic particles can be located in the magnetic field.

[0008] In one embodiment, the central axis of the induction coil can pass through the magnetic member.

[0009] In one embodiment, the mass of the magnetic particles is 39.2 mg - 137.2 mg; and / or,

[0010] The average particle size of the magnetic particles is 1 nm - 25000 nm; and / or,

[0011] The magnetic particles have a positive temperature coefficient of resistance; and / or,

[0012] The Curie temperature of the magnetic particles is 300 °C - 1000 °C; and / or,

[0013] The magnetic particles include at least one of elemental iron, ferrite, ferroalloy, modified graphite, modified graphene, elemental cobalt, cobalt oxide, cobalt alloy, elemental nickel, nickel oxide, and nickel alloy.

[0014] In one embodiment, the magnetic particles are uniformly distributed in the magnetic member; or,

[0015] The concentration of the magnetic particles on the side of the magnetic member close to the induction coil is greater than the concentration of the magnetic particles on the side of the magnetic member far from the induction coil.

[0016] In one embodiment, the material of the carrier includes a heat-insulating material; and / or,

[0017] The specific heat capacity of the carrier is 1.0 J / (kg·°C) - 2.5 J / (kg·°C); and / or,

[0018] The density of the carrier is 0.5 g / cm 3 - 2.5 g / cm 3 .

[0019] In one embodiment, the material of the carrier includes at least one of silica gel, fluororubber, cellulose acetate, polypropylene resin, and wood material; or,

[0020] The material of the carrier is cellulose acetate, and the magnetic member is prepared by a spinning process from a stock solution containing the magnetic particles and the cellulose acetate. In one embodiment, the aerosol generating device further includes:

[0021] An aerosol article having an aerosol generating member that includes a sensor and an aerosol generating substrate, the sensor being capable of generating heat energy in the magnetic field to heat the aerosol generating substrate;

[0022] A base having a heating chamber for accommodating the aerosol article, the induction coil surrounding the heating chamber for generating a magnetic field in the heating chamber;

[0023] The magnetic member is disposed on the base, or the aerosol article further includes the magnetic member, and the magnetic member is disposed adjacent to the aerosol generating member. Alternatively, the magnetic member includes a first magnetic member and a second magnetic member. The first magnetic member is disposed on the base, and the aerosol article further includes the second magnetic member. The first magnetic member includes the carrier and the magnetic particles, and the second magnetic member includes the carrier and the magnetic particles.

[0024] In one embodiment, when the magnetic member includes the first magnetic member and the second magnetic member, the second magnetic member is disposed adjacent to the aerosol generating member.

[0025] In one embodiment, when the magnetic member includes the first magnetic member and the second magnetic member, the first magnetic member is disposed on the wall of the heating chamber, and the second magnetic member is disposed adjacent to the first magnetic member.

[0026] In one embodiment, the sum of the masses of the magnetic particles in the first magnetic member and the magnetic particles in the second magnetic member is W1, and the mass of the receptor is W2, where 1.2 ≤ W1 / W2 ≤ 4.2; and / or,

[0027] The sum of the masses of the magnetic particles in the first magnetic member and the magnetic particles in the second magnetic member is 39.2 mg - 137.2 mg; and / or,

[0028] The material of the receptor includes at least one of Sendust alloy, silicon steel, permalloy, ferroaluminum alloy, Sendust alloy, iron-cobalt alloy, amorphous soft magnetic material, nanocrystalline soft magnetic material, ferrite, and soft magnetic composite material; and / or,

[0029] The length of the second magnetic member in the axial direction of the aerosol article is 3 mm - 10 mm; and / or,

[0030] The length of the second magnetic member in the axial direction of the aerosol article is L1, and the axial length of the aerosol article is L2, where 1:3 ≤ L1 / L2 ≤ 1:10; and / or,

[0031] The length of the second magnetic member in the axial direction of the aerosol article is L1, and the length of the aerosol generating substrate in the axial direction of the aerosol article is L3, where 1:1 ≤ L1 / L3 ≤ 1:5; and / or,

[0032] The magnetic particles are uniformly distributed in the second magnetic member, or the concentration of the magnetic particles on the side of the second magnetic member close to the aerosol generating member is greater than the concentration of the magnetic particles on the side of the second magnetic member far from the aerosol generating member; and / or,

[0033] The Curie temperature of the magnetic particles is lower than that of the receptor; and / or,

[0034] The distance between the second magnetic member and the receptor is greater than 0 and less than or equal to 10 mm; and / or,

[0035] The aerosol article further includes a tube body, a filter tip, and a temperature reducing member. The filter tip, the temperature reducing member, the aerosol generating member, and the second magnetic member are located in the tube body. The filter tip, the temperature reducing member, and the aerosol generating member are arranged in sequence along the axial direction of the tube body. The second magnetic member is located on the side of the aerosol generating member close to the temperature reducing member, or the second magnetic member is located on the side of the aerosol generating member away from the temperature reducing member, or the number of the second magnetic members is two, and the two second magnetic members are distributed on both sides of the aerosol generating member along the axial direction of the tube body.

[0036] Advantages of the embodiments of the present application:

[0037] (1) The aerosol generating device includes an induction coil and a magnetic member. When the induction coil is energized, a magnetic field can be generated. The magnetic member is disposed adjacent to the induction coil. The magnetic member includes a carrier and magnetic particles dispersed in the carrier. The magnetic particles can be located in the magnetic field. The magnetic particles can be magnetized in the magnetic field of the coil, thereby becoming an additional magnetic source. The magnetic field generated by the magnetic particles can couple with the magnetic field generated by the induction coil, so that the magnetic field intensity of the magnetic field generated by the aerosol generating device is enhanced. In the case of processing errors, assembly errors, etc. of the receptor, the receptor can still generate a preset magnetic intensity in the magnetic field with enhanced magnetic field intensity, increasing the probability of the aerosol article passing the recognition operation, reducing the requirements for the processing accuracy, assembly accuracy, and position accuracy of the receptor, and improving the user experience.

[0038] (2) The magnetic particles themselves are very fine granular. The magnetic field loop of the magnetic force line passing through the magnetic particles is short, and the eddy current effect in the magnetic particles is very weak. The temperature rise of the magnetic particles is not obvious, so that the magnetic particles can significantly increase the magnetic field intensity of the magnetic field generated by the aerosol generating device, but the magnetic particles themselves do not cause obvious eddy current heating effect. When the aerosol article is located in the magnetic field generated by the aerosol generating device, it can have a strong power input, and most of the power input is converted into the receptor. Under the same power input, the time for the receptor to reach the expected stable working temperature can be shortened, the heating speed of the receptor can be increased, so that the aerosol article can reach the preset heating temperature in a shorter time, effectively improving the user experience.

[0039] (3) While enhancing the heating rate of the receptor, magnetic particles facilitate more stable temperature control of the receptor. First, there is a competitive relationship between magnetic particles and the receptor in a magnetic field. Magnetic particles can disperse the input power of the system, making the power ratio adjustment process on the receptor smoother and reducing the temperature overshoot of the receptor. Second, due to the small size, high magnetic permeability, and large resistivity of magnetic particles, the magnetic flux loop passing through these magnetic particles is shorter, the eddy current heating effect of magnetic particles is weak, and the heat generated by magnetic particles themselves is limited. This can reduce the loop and dissipation of magnetic flux in the air, reduce the loss of magnetic energy, build more internal magnetic circuits while reducing the energy loss of the system, and stabilize the feedback signal of the inductance change, thus facilitating stable temperature control by the magnetic excitation system. Moreover, magnetic particles can absorb a part of the magnetic field, acting as a wave-absorbing shielding effect to reduce interference from the magnetic field to components such as nearby circuit board modules. At the same time, the heat generated by magnetic particles themselves is limited, which can reduce the thermal impact of magnetic components on nearby components, making the magnetic field coupling, heating, and operation of nearby components in the whole system more stable, and further facilitating more stable temperature control of the receptor. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] To more clearly illustrate the solutions in the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0041] Figure 1 Structural schematic diagram of an aerosol generating device provided by an embodiment of the present application;

[0042] Figure 2 Structural schematic diagram of an aerosol generating device provided by another embodiment of the present application;

[0043] Figure 3 Structural schematic diagram of an aerosol generating device provided by another embodiment of the present application;

[0044] Figure 4 Structural schematic diagram of an aerosol generating device provided by another embodiment of the present application;

[0045] Figure 5 Structural schematic diagram of an aerosol generating device provided by another embodiment of the present application;

[0046] Figure 6 Structural schematic diagram of an aerosol product provided by an embodiment of the present application;

[0047] Figure 7Schematic structural diagram of an aerosol article provided by another embodiment of the present application;

[0048] Figure 8 Schematic structural diagram of an aerosol article provided by another embodiment of the present application;

[0049] Figure 9 Schematic structural diagram of an aerosol article provided by another embodiment of the present application;

[0050] Figure 10 Schematic structural diagram of an aerosol article provided by another embodiment of the present application;

[0051] Figure 11 Schematic structural diagram of an aerosol article provided by another embodiment of the present application;

[0052] Figure 12 Magnetic field distribution diagram of an induction coil provided by an embodiment of the present application;

[0053] Figure 13 For Figure 12 Magnetic field intensity distribution diagram of the induction coil in

[0054] Figure 14 Magnetization intensity curve diagram showing the variation of the magnetization intensity of magnetic particles with temperature provided by an embodiment of the present application.

[0055] Reference numerals:

[0056] 100, aerosol generating device; 10, aerosol article; 1, aerosol generating member; 11, aerosol generating matrix; 12, sensor; 2, barrier member; 21, carrier; 22, magnetic particles; 3, tube body; 4, filter tip; 5, cooling member; 20, induction coil; 30, magnetic member; 31, first magnetic member; 32, second magnetic member; 40, base; 41, heating chamber; 411, chamber wall; 4111, side wall; 4112, bottom wall; 4113, opening. Detailed implementation manners

[0057] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0058] In the related art, the following common processing errors and assembly errors are prone to occur during the preparation, assembly, transportation and consumer use of the receptors: material segregation during the smelting of magnetic metals leads to uneven receptor material, which ultimately makes the receptors cut from certain areas have weak magnetism in the magnetic field; or, during the annealing of the magnetic metal, stress is not fully released, which ultimately makes the receptor weak in the magnetic field; or, during the rolling or cutting process of the receptor, the thickness or length of the molded receptor is smaller than expected, resulting in weak magnetism of the receptor in the magnetic field; or, when embedded in the aerosol matrix, the receptor is not located at the preset position of the aerosol matrix, and when the aerosol is When the aerosol product is located in the induction coil, the sensor is not located in the stronger area of ​​the solenoid magnetic field distribution, which eventually weakens the strength of the coupling between the sensor and the magnetic excitation system, resulting in weak magnetism of the sensor in the magnetic field; or, when cooperating with the magnetic coil, the aerosol product is not inserted in the expected position in the induction coil, which also weakens the strength of the coupling between the sensor and the magnetic excitation system; or, the traditional sensor generally includes an iron metal layer for heating, a magnetic material layer with a Curie temperature of about 500°C and a protective layer. In order to simplify the manufacturing process of the sensor and reduce the thickness of the sensor, the multi-layer structure of the sensor is made into a single-layer structure, which may also reduce the recognition pass rate of the sensor. Due to the above-mentioned processing errors, assembly errors and other reasons, after the aerosol product is inserted into the aerosol generating device, the magnetic strength generated by the sensor in the energized coil is lower than the preset value, and the magnetic excitation system will determine that the recognition operation fails, and the aerosol product cannot continue to be used. The probability of the aerosol product passing the recognition operation is low, which affects the user experience and needs further improvement.

[0059] The present application provides an aerosol generating device 100, referring to Figure 1 and Figure 2 , including an induction coil 20 and a magnetic member 30. The induction coil 20 can generate a magnetic field when energized; the magnetic member 30 is disposed adjacent to the induction coil 20, and the magnetic member 30 includes a carrier 21 and magnetic particles 22 dispersed in the carrier 21, and the magnetic particles 22 can be located in the magnetic field. The magnetic particles 22 can be magnetized in the magnetic field, thereby becoming an additional magnetic source. The magnetic field generated by the magnetic particles 22 can be coupled with the magnetic field generated by the induction coil 20, so that the magnetic field strength of the magnetic field generated by the aerosol generating device 100 is enhanced. In the event of processing errors, assembly errors, etc., the receptor 12 can still generate a preset magnetic strength in the magnetic field after the magnetic field strength is enhanced, thereby increasing the probability that the aerosol product 10 passes the identification operation, reducing the processing accuracy, assembly accuracy, and position accuracy requirements for the receptor 12, and improving the user experience.

[0060] In this embodiment, while the magnetic particles 22 increase the probability of the aerosol article 10 passing through the identification operation, the magnetic particles 22 can effectively shorten the time for the susceptor 12 to reach the expected stable operating temperature, increase the heating speed of the susceptor 12, so that the aerosol article 10 can reach the preset heating temperature in a shorter time, effectively improving the user experience. The magnetic particles 22 themselves are very fine particles. The magnetic field loop passing through the magnetic particles 22 is short, the eddy current effect in the magnetic particles 22 is very weak, and the temperature rise of the magnetic particles 22 is not obvious, so that the magnetic particles 22 can significantly increase the overall magnetism of the aerosol article 10, but the magnetic particles 22 themselves do not cause an obvious eddy current heating effect, enabling the aerosol article 10 to have a strong power input and converting most of the power input into the susceptor 12, which can further increase the heating speed of the susceptor 12.

[0061] In this embodiment, while the magnetic particles 22 increase the probability of the aerosol article 10 passing through the identification operation and increase the heating rate of the susceptor 12, they can also enable the susceptor 12 to achieve more stable temperature control. Firstly, there is a competitive relationship between the magnetic particles 22 and the susceptor 12 in a magnetic field. The magnetic particles 22 can disperse the input power of the system, making the power ratio adjustment process on the susceptor 12 smoother, reducing the temperature overshoot of the susceptor 12, and preventing the susceptor 12 from generating harmful substances and local over-carbonization during the heating of the aerosol-forming substrate 11 due to excessive temperature. Secondly, compared with the relatively large-sized bulk magnetic member 30, the magnetic particles 22 have a smaller size and volume, a high magnetic permeability, and a large resistivity. The magnetic flux line loop passing through the magnetic particles 22 is shorter, the eddy current heating effect of the magnetic particles 22 is weaker, and the heat generated by the magnetic particles 22 themselves is limited. This can reduce the magnetic energy loss. The magnetic particles 22 can construct more internal magnetic circuits while reducing the energy loss of the system, improving the stability of the feedback signal of the inductance change, and thus being conducive to the stable temperature control of the magnetic excitation system. Thirdly, the magnetic particles 22 can absorb a part of the magnetic field, playing a shielding role similar to wave absorption, reducing the interference of the magnetic field on components such as nearby circuit board modules. At the same time, the heat generated by the magnetic particles 22 themselves is limited, which can reduce the thermal influence of the magnetic member 30 on nearby components, making the magnetic field coupling, heating of the entire system, and the operation of nearby components more stable, and further facilitating the susceptor 12 to achieve more stable temperature control. Fourthly, the magnetic particles 22 cause a significant increase in the overall magnetism of the aerosol article 10 with temperature change, reducing the change amplitude of the magnetic permeability of the susceptor 12 (the ratio of the absolute value of the change in the magnetic permeability of the susceptor 12 with temperature to the overall magnetism of the aerosol article 10), and the change amplitude of the magnetic permeability of the susceptor 12 being in a smoother state, so as to maintain the stable coupling between the aerosol article 10 and the magnetic excitation system. Fifthly, the magnetic intensity of the magnetic particles 22 changes very little with temperature. The magnetization intensity-temperature change curve (MT curve) of the magnetic particles 22 is as Figure 14 shown. This MT curve is plotted based on the results obtained by a SQUID-VSM tester from Quantum Design Corporation under the conditions of a frequency of 40 Hz and a scanning speed of 15 K / min. When the temperature changes from 20 °C to 150 °C, the magnetic intensity of the magnetic particles 22 changes by about 1.4%, while the self-heating of the magnetic particles 22 is not obvious. Therefore, when the magnetic particles 22 are magnetically coupled with the induction coil 20, the magnetic intensity of the magnetic particles 22 remains basically unchanged, and the magnetic field coupling between the magnetic particles 22 and the induction coil 20 is relatively stable, making the entire aerosol article 10 have a relatively balanced magnetic change with the temperature change of the susceptor 12, and thus being conducive to the susceptor 12 to achieve more stable temperature control.

[0062] In this embodiment, the shape of the magnetic member 30 is not limited, and the shape of the magnetic member 30 can be a cylinder, a cuboid, a frustum of a cone or other shapes; the number of the magnetic members 30 is also not limited, and the number of the magnetic members 30 can be one, two or more than two. The position of the magnetic member 30 is also not limited. For example, as Figure 1 shown, the magnetic member 30 and the induction coil 20 are arranged in sequence along the axis direction of the induction coil 20; or, for another example, as Figure 2 shown, the magnetic member 30 and the induction coil 20 are arranged in sequence along the radial direction of the induction coil 20. The magnetic member 30 can be in direct contact with the induction coil 20 or can be arranged at an interval from the induction coil 20.

[0063] In one embodiment, the central axis Z of the induction coil 20 can pass through the magnetic member 30. Generally, the magnetic field in the central region where the central axis Z of the induction coil 20 is located is the strongest. In the axial direction and the radial direction of the induction coil 20, as the distance from the central region increases, the magnetic field intensity generated by the induction coil 20 will gradually decrease. For example, referring to Figure 12 , Figure 12 which is the simulation diagram of the magnetic field distribution of the induction coil 20. The COMSOL Multiphysics software is used to simulate and analyze the magnetic field generated by the induction coil 20 in the smoking device model. A solenoid coil is used in the model, and no magnetic flux concentrator is provided outside the coil. The inner diameter of the coil is 9 mm, and the effective height is 14 mm. Here, the effective height is the vertical distance between the upper and lower ends of the coil turns along the axis direction of the coil, that is, Figure 12 the section corresponding to the BC section in Figure 12 . Further, based on Figure 12 , with Figure 13 the plane corresponding to point A in Figure 13 as the zero point, the magnetic field intensity distribution diagram on the central axis is drawn within the 24 mm arc length section (AD section) upward.

[0064] In this embodiment, referring to Figure 1, the central axis Z of the induction coil 20 can pass through the magnetic component 30, so that at the same axial height, the position of the magnetic component 30 is closer to the central axis Z of the induction coil 20, and the magnetic field in the area where the magnetic component 30 is located is stronger, which further enables the magnetic component 30 to fall into a space with a strong magnetic field strength. The magnetic particles 22 can be effectively magnetized in the magnetic field, and the magnetic field coupling effect between the magnetic field generated by the magnetic particles 22 and the magnetic field generated by the induction coil 20 is better, and the magnetic field strength of the magnetic field generated by the aerosol generating device 100 is stronger.

[0065] In one embodiment, the mass of the magnetic particles 22 is 39.2 mg-137.2 mg. Optionally, the mass of the magnetic particles 22 can be any one of 39.2 mg, 40.0 mg, 60.0 mg, 80.0 mg, 100.0 mg, 110.0 mg, 120.0 mg, 130.0 mg, 137.2 mg, etc., or a range between any two thereof, which is not limited here. In this embodiment, if the mass of the magnetic particles 22 is too large, firstly, the material cost of the magnetic particles 22 is easily increased; secondly, the overall magnetism of the magnetic particles 22 is easily higher than the magnetism of the receptor 12, thereby weakening the coupling between the receptor 12 and the magnetic excitation system, affecting the dominant position of the coupling between the receptor 12 and the magnetic excitation coil, and being unfavorable for the receptor 12 to generate a preset magnetic strength and eddy current effect in the magnetic field; in addition, if the mass of the magnetic particles 22 is too large, it is easy to cause the mixing and dispersion of the magnetic particles 22 in the raw materials in the process of preparing the magnetic part 30, and the hardness of the prepared magnetic part 30 is too high, which is not conducive to the demoulding, cutting and assembly of the magnetic part 30. If the mass of the magnetic particles 22 is too small, it is easy to cause the effect of the magnetic particles 22 on increasing the overall magnetism of the aerosol product 10 to be unsatisfactory, and reduce the magnetic flux concentration effect and wave absorption effect of the magnetic particles 22 on the magnetic field.

[0066] In one embodiment, the average particle size of the magnetic particles 22 is 1nm-25000nm. The average particle size of the magnetic particles 22 is 1nm-25000nm. Optionally, the average particle size of the magnetic particles 22 can be any one of 1nm, 5nm, 10nm, 100nm, 1000nm, 10000nm, 15000nm, 20000nm, 25000nm, etc., or a range between any two of them, which is not limited here. In this embodiment, if the average particle size of the magnetic particles 22 is too small, it is easy to increase the processing cost of the magnetic particles 22. If the average particle size of the magnetic particles 22 is too large, on the one hand, it is easy to cause the magnetic particles 22 to precipitate and segregate during the mixing process with other raw materials, which is not conducive to the uniform dispersion of the magnetic particles 22 in the carrier 21; on the other hand, the formula (I) of the heating power P of the magnetic conductor in the magnetic field is as follows:

[0067]

[0068] In formula (I):

[0069] B is the maximum magnetic induction intensity, with the unit of tesla (T);

[0070] f is the frequency of the alternating magnetic field, with the unit of hertz (Hz);

[0071] d is the thickness of the conductor, with the unit of meter (m);

[0072] V is the volume of the conductor, with the unit of cubic meter (m 3 );

[0073] ρ is the resistivity of the conductor, with the unit of ohm-meter (Ω·m)

[0074] Formula (I) shows that, on the premise that other parameters are fixed, the heating power P is proportional to the square of the thickness of the magnetic conductor and proportional to the volume of the magnetic conductor. When the average particle size of the magnetic particles 22 is too large, it is easy to cause the heating power P of the magnetic particles 22 to be too large, and the heating of the magnetic particles 22 will be relatively significant, which is easy to cause the temperature of the magnetic particles 22 and the magnetic component 30 to be too high, increasing the magnetic energy loss. The magnetic component 30 is likely to cause a greater thermal impact on adjacent components, and the magnetic component 30 is likely to generate harmful substances or odors. Therefore, controlling the average particle size of the magnetic particles 22 within an appropriate range can reduce the material cost of the magnetic particles 22, improve the distribution uniformity of the magnetic particles 22 in the carrier 21. At the same time, it can also prevent the heating temperature of the magnetic particles 22 and the magnetic component 30 from being too high, reducing the system energy loss and the generation of harmful substances or odors.

[0075] In one embodiment, the magnetic particles 22 have a positive temperature coefficient of resistance. In an embodiment, the magnetic particles 22 have a positive temperature coefficient of resistance. The relationship between the resistivity of the magnetic particles 22 and the temperature can be expressed by formula (II): ρ(T) = ρ0[1 + α(T - T0)].

[0076] Wherein, in formula (II):

[0077] ρ(T) is the resistivity of the magnetic particles 22 at temperature T, with the unit of ohm-meter (Ω·m);

[0078] ρ0 is the resistivity of the magnetic particles 22 at the reference temperature T0, that is, the resistivity value at the reference temperature, with the unit of Ω·m;

[0079] α is the temperature coefficient of resistivity, representing the relative change in resistivity caused by a unit temperature change, with the unit of per degree Celsius (°C -1 ) or per kelvin (K -1 );

[0080] T is the current temperature, in degrees Celsius (°C) or Kelvin (K);

[0081] T0 is the reference temperature (base temperature), usually taking a standard value such as 0 °C or room temperature (20 °C), in degrees Celsius (°C);

[0082] Combining Formula (I) and Formula (II), when the magnetic member 30 or the magnetic particles 22 overheat, the resistivity ρ of the magnetic particles 22 with a positive temperature coefficient of resistance increases, and the heating power P of the magnetic particles 22 will decrease, thereby realizing the self-limiting temperature protection of the magnetic particles 22 to prevent the temperature of the magnetic particles 22 from being too high.

[0083] In one embodiment, the Curie temperature of the magnetic particles 22 is 300 °C - 1000 °C. Optionally, the Curie temperature of the magnetic particles 22 can be any one or the range between any two of 300 °C, 400 °C, 500 °C, 600 °C, 700 °C, 800 °C, 900 °C, 1000 °C, etc., which is not limited herein.

[0084] In one embodiment, the magnetic particles 22 include at least one of elemental iron, ferrite, ferroalloy, modified graphite, modified graphene, elemental cobalt, cobalt oxide, cobalt alloy, elemental nickel, nickel oxide, nickel alloy. Preferably, the magnetic particles 22 include at least one of ferrite, permalloy, and Sendust alloy.

[0085] In one embodiment, the magnetic particles 22 are uniformly distributed in the magnetic member 30, so that the magnetic fields generated at various parts of the magnetic member 30 are relatively uniform.

[0086] In one embodiment, when the magnetic particles 22 cannot be uniformly distributed in the magnetic member 30, the concentration of the magnetic particles 22 on the side of the magnetic member 30 close to the induction coil 20 is greater than the concentration of the magnetic particles 22 on the side of the magnetic member 30 far from the induction coil 20. Ensure that most of the magnetic particles 22 in the magnetic member 30 can be distributed in the space with a stronger magnetic field intensity in the central region close to the induction coil 20, improve the magnetic field coupling effect between the magnetic particles 22 and the induction coil 20, and effectively enhance the overall magnetism of the aerosol article 10.

[0087] In one embodiment, the material of the carrier 21 includes a heat-insulating material. Using a heat-insulating material for the material of the carrier 21 can reduce the heat transfer of the receptor 12 and the magnetic particles 22 to the carrier 21, thereby preventing the temperature of the carrier 21 from being too high and reducing the heat loss of the receptor 12 at the same time.

[0088] In one embodiment, the specific heat capacity of the carrier 21 is 1.0 J / (kg·°C) - 2.5 J / (kg·°C); optionally, the specific heat capacity of the carrier 21 can be any one or the range between any two of 1.0 J / (kg·°C), 1.5 J / (kg·°C), 2.0 J / (kg·°C), 2.5 J / (kg·°C), etc., which is not limited herein.

[0089] In one embodiment, the density of the carrier 21 is 0.5 g / cm 3 - 2.5 g / cm 3 . Optionally, the density of the carrier 21 can be any one or the range between any two of 0.5 g / cm 3 , 1.0 g / cm 3 , 1.5 g / cm 3 , 2.0 g / cm 3 , 2.5 g / cm 3 etc., which is not limited herein. Controlling the density of the carrier 21 within the above range can reduce the weight of the carrier 21, which is beneficial to reducing the total weight of the aerosol product 10.

[0090] In one embodiment, the material of the carrier 21 includes at least one of silica gel, fluororubber, cellulose acetate, polypropylene resin, and wood material. The above carrier 21 materials have the characteristics of low density, low specific heat capacity, softness, and loose structure, which can reduce the weight of the aerosol product 10 and reduce heat absorption.

[0091] In one embodiment, referring to Figures 2 to 5 , the aerosol generating device 100 further includes an aerosol product 10 and a base 40. The aerosol product 10 has an aerosol generating member 1, and the aerosol generating member 1 includes a sensor 12 and an aerosol generating matrix 11. The sensor 12 can generate heat energy in a magnetic field to heat the aerosol generating matrix 11; the base 40 is provided with a heating chamber 41 for accommodating the aerosol product 10, and the induction coil 20 surrounds the heating chamber 41 for generating a magnetic field in the heating chamber 41. The induction coil 20 surrounds the heating chamber 41, so that after the aerosol product 10 is inserted into the heating chamber 41, it can be located in a space with a relatively large magnetic field intensity of the induction coil 20, improving the magnetic intensity of the sensor 12 in the magnetic field, and further improving the probability of the aerosol product 10 passing the recognition operation and the heating effect. In this embodiment, a part of the heating chamber 41 is surrounded by the induction coil 20, or the entire heating chamber 41 is surrounded by the induction coil 20, which is not limited herein.

[0092] In one embodiment, the magnetic member 30 can be disposed on the base 40. For example, referring to Figure 3, the aerosol generating device 100 includes an aerosol article 10, a base 40, an induction coil 20, and a magnetic member 30; the base 40 is provided with a heating chamber 41 for accommodating the aerosol article 10, the induction coil 20 surrounds the heating chamber 41 for generating a magnetic field in the heating chamber 41, the heating chamber 41 has an opening 4113 for taking and placing the aerosol article 10, the chamber wall 411 of the heating chamber 41 includes a side wall 4111 and a bottom wall 4112, and the bottom wall 4112 is located on the side of the chamber wall 411 away from the opening 4113, and the magnetic member 30 is fixed on the bottom wall 4112.

[0093] In one embodiment, referring to Figure 4 , the aerosol article 10 includes a magnetic member 30. That is, the magnetic member 30 is located in the aerosol article 10 and is part of the aerosol article 10. The magnetic member 30 includes the magnetic particles 22 and the carrier 21 in the above embodiment, and the magnetic member 30 is disposed adjacent to the aerosol generating member 1. Generally, the aerosol generating member 1 is disposed in the central region of the induction coil 20; therefore, the magnetic member 30 is disposed adjacent to the aerosol generating member 1, and the magnetic member 30 can be located at a position close to the central region of the induction coil, so that the magnetic member 30 can fall into a space with a stronger magnetic field intensity, and the magnetic particles 22 can be effectively magnetized in the magnetic field, thereby becoming an additional magnetic source. The magnetic field generated by the magnetic particles 22 can be magnetically coupled with the magnetic field generated by the induction coil 20, so that the overall magnetism of the aerosol article 10 is enhanced. The magnetic particles 22 enable the sensor 12 to generate a preset magnetic intensity in the enhanced magnetic field even in the case of processing errors, assembly errors, etc., improving the probability of the aerosol article 10 passing the recognition operation, reducing the requirements for the processing accuracy, assembly accuracy, and position accuracy of the sensor 12, and improving the user experience.

[0094] In one embodiment, referring to Figure 5 , the magnetic member 30 includes a first magnetic member 31 and a second magnetic member 32. The first magnetic member 31 is disposed on the base 40, and the aerosol article 10 includes the second magnetic member 32; that is, the first magnetic member 31 is disposed on the base 40, and the second magnetic member 32 is located in the aerosol article 10 and is part of the aerosol article 10. The first magnetic member 31 includes the carrier 21 and the magnetic particles 22 in the above embodiment, and the second magnetic member 32 includes the carrier 21 and the magnetic particles 22 in the above embodiment.

[0095] In one embodiment, referring to Figure 5, when the magnetic member 30 includes a first magnetic member 31 and a second magnetic member 32, the second magnetic member 32 is disposed adjacent to the aerosol generating member 1. The magnetic particles 22 in the first magnetic member 31 and the second magnetic member 32 can be magnetized in the coil magnetic field, thereby becoming additional magnetic sources. The magnetic field generated by the magnetic particles 22 in the first magnetic member 31, the magnetic field generated by the induction coil 20, and the magnetic field generated by the magnetic particles 22 in the second magnetic member 32 can undergo magnetic field coupling, so that the overall magnetism of the aerosol article 10 is enhanced. The first magnetic member 31 and the second magnetic member 32 can act synergistically to jointly increase the probability of the aerosol article 10 passing through the recognition operation.

[0096] In this embodiment, the number of the second magnetic members 32 is not limited either. The number of the second magnetic members 32 can be one, two or more than two. The position of the second magnetic member 32 is not limited either. The second magnetic member 32 can be distributed at any end of the aerosol generating member 1 along the axial direction of the aerosol generating member 1, or the second magnetic member 32 can be distributed at both ends of the aerosol generating member 1 along the axial direction of the aerosol generating member 1. The second magnetic member 32 can be in direct contact with the aerosol generating member 1 or can be spaced apart from the aerosol generating member 1.

[0097] In one embodiment, referring to Figure 5 , when the magnetic member 30 includes a first magnetic member 31 and a second magnetic member 32, the first magnetic member 31 is disposed on the chamber wall 411 of the heating chamber 41, and the second magnetic member 32 is disposed adjacent to the first magnetic member 31. Both the second magnetic member 32 and the first magnetic member 31 have magnetism in the magnetic field. The first magnetic member 31 can generate a magnetic attraction on the second magnetic member 32, so that after the aerosol article 10 is inserted into the heating chamber 41, the aerosol article 10 is more firmly fixed in the heating chamber 41, and during the process of the user sucking the aerosol, it is not easy for the user's lips to take the aerosol article 10 out of the heating chamber 41. In this embodiment, the fixing method of the first magnetic member 31 is not limited. The first magnetic member 31 can be fixed to the chamber wall 411 of the heating chamber 41 by snap connection, plug connection, bonding or other means.

[0098] In one embodiment, the sum of the masses of the magnetic particles 22 in the first magnetic member 31 and the magnetic particles 22 in the second magnetic member 32 is W1, and the mass of the receptor 12 is W2, where 1.2 ≤ W1 / W2 ≤ 4.2. Optionally, the value of W1 / W2 can be any one of 1.2, 1.5, 1.8, 2.0, 2.5, 2.8, 3.0, 3.5, 4.0, 4.2, etc. or the range between any two of them, which is not limited herein. In this embodiment, if the value of W1 / W2 is too large, first, it is easy to increase the material cost of the magnetic particles 22; second, it is easy to cause the overall magnetism of the magnetic particles 22 to be higher than the magnetism of the receptor 12, thus greatly weakening the coupling between the receptor 12 and the magnetic excitation system, affecting the dominant position of the coupling between the receptor 12 and the magnetic excitation coil, and being unfavorable for the receptor 12 to generate a preset magnetic intensity and eddy current effect in the magnetic field, reducing the probability of the aerosol article 10 passing the recognition operation. If the value of W1 / W2 is too small, it is easy to cause the effect of the magnetic particles 22 increasing the overall magnetism of the aerosol article 10 to be unsatisfactory, reducing the magnetic flux concentration effect and wave absorption effect of the magnetic particles 22 on the magnetic field.

[0099] In one embodiment, the sum of the masses of the magnetic particles 22 in the first magnetic member 31 and the magnetic particles 22 in the second magnetic member 32 is 39.2 mg - 137.2 mg. Optionally, the sum of the masses of the magnetic particles 22 in the first magnetic member 31 and the magnetic particles 22 in the second magnetic member 32 can be any one of 39.2 mg, 40.0 mg, 60.0 mg, 80.0 mg, 100.0 mg, 110.0 mg, 120.0 mg, 130.0 mg, 137.2 mg, etc. or the range between any two of them, which is not limited herein. In this embodiment, if the sum of the masses of the magnetic particles 22 in the first magnetic member 31 and the magnetic particles 22 in the second magnetic member 32 is too large, first, it is easy to increase the material cost of the magnetic particles 22; second, it is easy to cause the overall magnetism of the magnetic particles 22 to be higher than the magnetism of the receptor 12, thus weakening the coupling between the receptor 12 and the magnetic excitation system, affecting the dominant position of the coupling between the receptor 12 and the magnetic excitation coil, and being unfavorable for the receptor 12 to generate a preset magnetic intensity and eddy current effect in the magnetic field. If the sum of the masses of the magnetic particles 22 in the first magnetic member 31 and the magnetic particles 22 in the second magnetic member 32 is too small, it is easy to cause the effect of the magnetic particles 22 increasing the overall magnetism of the aerosol article 10 to be unsatisfactory, reducing the magnetic flux concentration effect and wave absorption effect of the magnetic particles 22 on the magnetic field.

[0100] In one embodiment, the material of the receptor 12 includes at least one of Sendust alloy, silicon steel, permalloy, Fe-Al alloy, Sendust alloy, Fe-Co alloy, amorphous soft magnetic material, nanocrystalline soft magnetic material, ferrite, and soft magnetic composite material.

[0101] In one embodiment, the Curie temperature of the magnetic particles 22 is lower than the Curie temperature of the susceptor 12 .

[0102] In one embodiment, the Curie temperature of the susceptor 12 is 300° C.-500° C. Optionally, the Curie temperature of the susceptor 12 may be any one of 300° C., 350° C., 400° C., 450° C., 500° C., etc., or a range between any two of the above, which is not limited here.

[0103] In one embodiment, the length of the second magnetic member 32 in the axial direction of the aerosol product 10 is 3mm-10mm. Optionally, the length of the second magnetic member 32 in the axial direction of the aerosol product 10 can be any one of 3mm, 5mm, 7mm, 9mm, 10mm, etc. or a range between any two, which is not limited here. In this embodiment, if the length of the second magnetic member 32 in the axial direction of the aerosol product 10 is too small, it is not conducive to the second magnetic member 32 to load enough magnetic particles 22; if the length of the second magnetic member 32 in the axial direction of the aerosol product 10 is too large, it is easy to cause the relative position of the sensor 12 in the aerosol product 10 in the axial direction of the aerosol product 10 to be greatly offset, so that after the aerosol product 10 is inserted into the heating chamber 41, the sensor 12 cannot be located in the central area of ​​the induction coil 20, weakening the magnetic field coupling effect between the sensor 12 and the magnetic field of the induction coil 20.

[0104] In one embodiment, the length of the second magnetic member 32 in the axial direction of the aerosol product 10 is L1, the axial length of the aerosol product 10 is L2, and 1:3≤L1 / L2≤1:10. Optionally, the value of L1 / L2 can be any one of 1:3, 1:5, 1:7, 1:9, 1:10, etc., or a range between any two of them, which is not limited here.

[0105] In one embodiment, the length of the second magnetic member 32 in the axial direction of the aerosol product 10 is L1, the length of the aerosol generating substrate 11 in the axial direction of the aerosol product 10 is L3, and 1:1≤L1 / L3≤1:5. Optionally, the value of L1 / L3 can be any one of 1:1, 1:2, 1:3, 1:4, 1:5, etc., or a range between any two of them, which is not limited here.

[0106] In one embodiment, the magnetic particles 22 are evenly distributed in the second magnetic member 32 , so that the magnetic field and the heating temperature generated at various locations of the second magnetic member 32 are relatively uniform.

[0107] In one embodiment, when the magnetic particles 22 cannot be evenly distributed in the second magnetic member 32, the concentration of the magnetic particles 22 in the second magnetic member 32 on the side closer to the aerosol generating member 1 is greater than the concentration of the magnetic particles 22 in the second magnetic member 32 on the side farther from the aerosol generating member 1. The concentration of the magnetic particles 22 in the second magnetic member 32 on the side closer to the aerosol generating member 1 is greater than the concentration of the magnetic particles 22 in the second magnetic member 32 on the side farther from the aerosol generating member 1. Ensure that most of the magnetic particles 22 in the second magnetic member 32 can be distributed in the space with a stronger magnetic field intensity near the central region of the induction coil 20, improve the magnetic field coupling effect between the magnetic particles 22 and the induction coil 20, and effectively enhance the overall magnetism of the aerosol article 10.

[0108] In one embodiment, the second magnetic member 32 is not in contact with the receptor 12, which can reduce the heat transfer from the receptor 12 to the second magnetic member 32, reduce the heat absorption of the magnetic particles 22 and the carrier 21 by the receptor 12, reduce heat loss, and prevent the temperature of the second magnetic member 32 from being too high. At the same time, it is convenient to separately process and assemble the second magnetic member 32 and the aerosol generating member 1. The second magnetic member 32 and the aerosol generating member 1 can be mass-produced separately with high efficiency in batches, and the consistency of the quality of the second magnetic member 32 and the aerosol generating member 1 can be ensured. There is no need for an additional welding or bonding process to connect the second magnetic member 32 and the aerosol generating member 1, which can save processing steps and production costs.

[0109] In one embodiment, the distance between the second magnetic member 32 and the receptor 12 is greater than 0 and less than or equal to 10 mm; optionally, the distance between the second magnetic member 32 and the receptor 12 can be any one or the range between any two of 0.001 mm, 0.1 mm, 1.0 mm, 2.0 mm, 4.0 mm, 6.0 mm, 8.0 mm, 10.0 mm, etc., which is not limited here. Setting the distance between the second magnetic member 32 and the receptor 12 within the above range can reduce the heat absorption of the magnetic particles 22 and the carrier 21 by the receptor 12. At the same time, ensure that the second magnetic member 32 can be distributed in the space with a stronger magnetic field intensity near the central region of the induction coil 20, improve the magnetic field coupling effect between the magnetic particles 22 and the induction coil 20, and effectively enhance the overall magnetism of the aerosol article 10.

[0110] In one embodiment, the material of the carrier 21 of the second magnetic member 32 includes a heat-insulating material. Using a heat-insulating material for the material of the carrier 21 can reduce the heat transfer of the receptor 12 and the magnetic particles 22 to the carrier 21, thereby preventing the temperature of the carrier 21 from being too high and reducing the heat loss of the receptor 12.

[0111] In one embodiment, the specific heat capacity of the carrier 21 of the second magnetic member 32 is 1.0 J / (kg·°C) - 2.5 J / (kg·°C). Optionally, the specific heat capacity of the carrier 21 can be any one or the range between any two of 1.0 J / (kg·°C), 1.5 J / (kg·°C), 2.0 J / (kg·°C), 2.5 J / (kg·°C), etc., which is not limited herein.

[0112] In one embodiment, the density of the carrier 21 of the second magnetic member 32 is 0.5 g / cm 3 - 2.5 g / cm 3 . Optionally, the density of the carrier 21 can be any one or the range between any two of 0.5 g / cm 3 , 1.0 g / cm 3 , 1.5 g / cm 3 , 2.0 g / cm 3 , 2.5 g / cm 3 , etc. Controlling the density of the carrier 21 within the above range can reduce the weight of the carrier 21, which is beneficial to reducing the total weight of the aerosol product 10.

[0113] In one embodiment, the material of the carrier 21 of the second magnetic member 32 includes at least one of silica gel, fluororubber, cellulose acetate, polypropylene resin, and wood material. The above carrier 21 materials have the characteristics of low density, low specific heat capacity, softness, loose structure, etc., which can reduce the weight of the aerosol product 10, reduce heat absorption and ensure a certain draw resistance. At the same time, it is convenient to form multiple tiny ventilation holes on the carrier 21 at one time, or there is no need to perform an opening operation due to the large porosity of the carrier 21 material itself; in addition, the carrier 21 itself has the function of blocking the leakage of particulate matter in the aerosol generating member 1. Therefore, there is no need to bond the end of the aerosol generating member 1 with a sealing paper, which can save the bonding process of the sealing paper.

[0114] In one embodiment, refer to Figure 6, the aerosol product 10 further includes a tube body 3, a filter tip 4, and a cooling member 5. The filter tip 4, the cooling member 5, the aerosol generating member 1, and the second magnetic member 32 are located in the tube body 3. The filter tip 4, the cooling member 5, and the aerosol generating member 1 are arranged in sequence along the axial direction of the tube body 3; the second magnetic member 32 is located on the side of the aerosol generating member 1 close to the cooling member 5. In this embodiment, the material of the tube body 3 is not limited, and the material of the tube body 3 may include at least one of a soft paper tube, a hard paper tube, an aluminum foil paper tube, a high-temperature resistant plastic tube, and a silica gel tube. The material of the filter tip 4 is not limited, and the material of the filter tip 4 may include at least one of sponge and cellulose acetate. The material of the cooling member 5 is not limited, and the material of the cooling member 5 may include at least one of silica gel, cellulose acetate, various resins such as porous polypropylene, various papers, cotton, and plant-based materials. The material of the aerosol generating matrix 11 in the aerosol generating member 1 is not limited, and the material of the aerosol generating matrix 11 may include at least one of tobacco paste, particulate fuming substances, filamentous fuming substances, and massive fuming substances.

[0115] In one embodiment, referring to Figure 7 , the aerosol product 10 further includes a tube body 3, a filter tip 4, and a cooling member 5. The filter tip 4, the cooling member 5, the aerosol generating member 1, and the second magnetic member 32 are located in the tube body 3. The filter tip 4, the cooling member 5, and the aerosol generating member 1 are arranged in sequence along the axial direction of the tube body 3, and the second magnetic member 32 is located on the side of the aerosol generating member 1 away from the cooling member 5.

[0116] In one embodiment, referring to Figure 8 , the aerosol product 10 further includes a tube body 3, a filter tip 4, and a cooling member 5. The filter tip 4, the cooling member 5, the aerosol generating member 1, and the second magnetic member 32 are located in the tube body 3. The filter tip 4, the cooling member 5, and the aerosol generating member 1 are arranged in sequence along the axial direction of the tube body 3. The number of the second magnetic members 32 is two, and the two second magnetic members 32 are distributed on both sides of the aerosol generating member 1 along the axial direction of the tube body 3.

[0117] In one embodiment, the second magnetic member 32 is provided with ventilation holes or grooves (not shown in the figure). The ventilation holes or grooves are used to communicate with the external atmosphere, so that the aerosol product 10 has a suitable smoke resistance.

[0118] In one embodiment, in addition to including the aforementioned aerosol product 10, induction coil 20, magnetic member 30, and base 40, the aerosol generating device 100 may further include structures that a conventional aerosol generating device should have, such as a power supply member, a circuit board, etc., which will not be elaborated here.

[0119] In one embodiment, referring to Figures 9 - 11, the aerosol product 10 further includes a barrier member 2. The filter tip 4, the temperature reduction member 5, the aerosol generating member 1, and the barrier member 2 are located in the tube body 3, and the aerosol generating member 1 and the barrier member 2 are disposed adjacent to each other; the aerosol generating member 1 includes an aerosol generating matrix 11 and a sensor 12, and the sensor 12 can generate heat energy in a magnetic field to heat the aerosol generating matrix 11.

[0120] In some embodiments, the barrier member 2 can be magnetic in a magnetic field. Of course, the barrier member 2 can also be non-magnetic in a magnetic field, and the embodiments of the present application do not limit this.

[0121] As mentioned above, in some embodiments, the aerosol product 10 includes a magnetic member 30, and the magnetic member 30 is located in the aerosol product 10 and is a part of the aerosol product 10. Then, when the barrier member 2 is magnetic in a magnetic field, the barrier member 2 can be the above-mentioned magnetic member 30.

[0122] As mentioned above, in some embodiments, the magnetic member 30 can include a second magnetic member 32. Then, when the barrier member 2 is magnetic in a magnetic field, the barrier member 2 can be the above-mentioned second magnetic member 32.

[0123] The present application also provides a method for preparing a magnetic member 30, which specifically includes the following steps:

[0124] S1. Provide a carrier material and magnetic particles 22;

[0125] S2. Add the magnetic particles 22 to the carrier material and stir evenly to obtain a mixture;

[0126] S3. Extrude the mixture through a mold at a temperature of 50°C - 500°C to form a magnetic member 30.

[0127] In this embodiment, the magnetic particles 22 can be commercially available magnetic particles, and the carrier material can be commercially available carrier materials. In step S1, the mass ratio between the magnetic particles 22 and the carrier material can be (2:8) - (7:3). In step S2, the stirring temperature can be 20°C - 30°C, and the stirring can be carried out using a stirrer.

[0128] In some embodiments, the material of the carrier is cellulose acetate, and the magnetic member 30 is prepared by a spinning process from a stock solution containing magnetic particles 22 and cellulose acetate. It specifically includes the following steps: S11. Provide a stock solution containing cellulose acetate and magnetic particles 22;

[0129] S12. Prepare the magnetic member 30 from the stock solution through a spinning process. The magnetic member 30 includes cellulose acetate and magnetic particles 22 dispersed in the cellulose acetate.

[0130] In this embodiment, the magnetic particles 22 can be commercially available magnetic particles, and the cellulose acetate can be commercially available cellulose acetate. In the stock solution, the mass ratio between the magnetic particles and the cellulose acetate can be (2:8)-(7:3).

[0131] The following further illustrates the present application through specific embodiments.

[0132] Embodiment 1

[0133] An aerosol generating device includes an aerosol article, a base, an induction coil, and a magnetic member; the base is provided with a heating chamber for accommodating the aerosol article, the induction coil surrounds the heating chamber for generating a magnetic field in the heating chamber, the heating chamber has an opening for taking and placing the aerosol article, the chamber wall of the heating chamber includes a side wall and a bottom wall, the bottom wall is located on the side of the chamber wall away from the opening, and the distance between the magnetic member and the induction coil in the axial direction of the heating chamber is 6 mm;

[0134] The aerosol article includes a tube body, a filter tip, a temperature reducing member, and an aerosol generating member. The filter tip, the temperature reducing member, and the aerosol generating member are sequentially fixed in the tube body along the axial direction of the aerosol article. The tube body is a rigid paper tube. The material of the filter tip is sponge. The material of the temperature reducing member is cellulose acetate. The outer diameter of the aerosol generating member is 6.4 mm and the axial length is 12 mm. The aerosol generating member includes an aerosol generating matrix and a receptor. The aerosol generating matrix is tobacco paste. The receptor is inserted into the axial center region of the tobacco paste. The receptor is a Fe-Ni-Zr-based magnetic metal sheet with a size of 0.1 mm x 3.83 mm x 11 mm, and the mass of the receptor is 32.4 mg;

[0135] Among them, the axial length of the magnetic member is 4 mm, the outer diameter is 5 mm, the total mass of the magnetic member is 196 mg, the carrier of the magnetic member is silica gel, and ferrite magnetic particles with an average particle size of 25 microns are uniformly dispersed in the silica gel. The mass percentage of the ferrite magnetic particles in the magnetic member is 30 wt%, the weight of the ferrite magnetic particles is 58.8 mg, and the mass ratio of the ferrite magnetic particles to the receptor is 1.8:1.

[0136] Embodiment 2

[0137] The main difference between Embodiment 2 and Embodiment 1 is that:

[0138] The mass percentage of the ferrite magnetic particles in the magnetic member is 20 wt%, the weight of the ferrite magnetic particles is 39.2 mg, and the mass ratio of the ferrite magnetic particles to the receptor is 1.2:1.

[0139] Embodiment 3

[0140] The main difference between Embodiment 3 and Embodiment 1 is that:

[0141] The mass percentage of ferrite magnetic particles in the magnetic component is 60 wt%, the weight of the ferrite magnetic particles is 117.6 mg, and the mass ratio of the ferrite magnetic particles to the receptor is 3.6:1.

[0142] Example 4

[0143] The main difference between Example 4 and Example 1 is that:

[0144] The mass percentage of ferrite magnetic particles in the magnetic component is 70 wt%, the weight of the ferrite magnetic particles is 137.2 mg, and the mass ratio of the ferrite magnetic particles to the receptor is 4.2:1.

[0145] Example 5

[0146] The main difference between Example 5 and Example 1 is that:

[0147] The material of the magnetic particles is permalloy magnetic powder, and the material of the receptor is an iron-aluminum alloy magnetic metal sheet.

[0148] Example 6

[0149] An aerosol generating device includes an aerosol article, a base, an induction coil, and a magnetic component; the base is provided with a heating chamber for accommodating the aerosol article, the induction coil surrounds the heating chamber for generating a magnetic field in the heating chamber, the heating chamber has an opening for taking in and out the aerosol article, the chamber wall of the heating chamber includes a side wall and a bottom wall, and the bottom wall is located on the side of the chamber wall away from the opening;

[0150] The magnetic component includes a first magnetic component and a second magnetic component. The first magnetic component is fixed on the bottom wall of the heating chamber, and the distance between the first magnetic component and the induction coil in the axial direction of the heating chamber is 6 mm;

[0151] The aerosol article includes a tube body, a filter tip, a cooling member, an aerosol generating member, and a second magnetic component. The filter tip, the cooling member, the aerosol generating member, and the second magnetic component are sequentially fixed in the tube body along the axial direction of the aerosol article. The tube body is a hard paper tube, the material of the filter tip is sponge, the material of the cooling member is cellulose acetate, the outer diameter of the aerosol generating member is 6.4 mm, the axial length is 12 mm, the aerosol generating member includes an aerosol generating matrix and a receptor, the aerosol generating matrix is tobacco paste, the receptor is inserted into the axial center region of the tobacco paste, the receptor is a Fe-Ni-Zr-based magnetic metal sheet with a size of 0.1 mm x 3.83 mm x 11 mm, and the mass of the receptor is 32.4 mg;

[0152] Among them, the axial length of the first magnetic part is 2 mm, the outer diameter is 5 mm, the total mass of the first magnetic part is 98 mg, the carrier of the first magnetic part is silica gel, and ferrite magnetic particles with an average particle size of 25 microns are uniformly dispersed in the silica gel. The mass percentage of the ferrite magnetic particles in the magnetic part is 20 wt%, and the weight of the ferrite magnetic particles is 19.6 mg;

[0153] The axial length of the second magnetic part is 3 mm, the outer diameter is 6.4 mm, the total mass of the second magnetic part is 98 mg, the carrier of the second magnetic part is silica gel, and ferrite magnetic powder particles with an average particle size of 25 microns are uniformly dispersed in the silica gel. The mass percentage of the ferrite magnetic powder particles in the second magnetic part is 20 wt%, and the weight of the ferrite magnetic powder particles is 19.6 mg;

[0154] The sum of the masses of the ferrite magnetic powder particles of the first magnetic part and the ferrite magnetic particles of the second magnetic part, W1, is 39.2 mg, and the mass ratio of W1 to the receptor is 1.2:1.

[0155] Example 7

[0156] The main difference between Example 7 and Example 6 is that:

[0157] The axial length of the first magnetic part is 2 mm, the outer diameter is 5 mm, the total mass of the first magnetic part is 98 mg, the carrier of the first magnetic part is silica gel, and ferrite magnetic particles with an average particle size of 25 microns are uniformly dispersed in the silica gel. The mass percentage of the ferrite magnetic particles in the magnetic part is 70 wt%, and the weight of the ferrite magnetic particles is 68.6 mg;

[0158] The axial length of the second magnetic part is 5 mm, the outer diameter is 6.4 mm, the total mass of the second magnetic part is 98 mg, the carrier of the second magnetic part is silica gel, and ferrite magnetic powder particles with an average particle size of 25 microns are uniformly dispersed in the silica gel. The mass percentage of the ferrite magnetic powder particles in the second magnetic part is 70 wt%, and the weight of the ferrite magnetic powder particles is 68.6 mg;

[0159] The sum of the masses of the ferrite magnetic powder particles of the first magnetic part and the ferrite magnetic particles of the second magnetic part, W1, is 137.2 mg, and the mass ratio of W1 to the receptor is 4.2:1.

[0160] Example 8

[0161] The main difference between Example 8 and Example 1 is that:

[0162] The mass percentage of the ferrite magnetic particles in the magnetic part is 5 wt%, the weight of the ferrite magnetic particles is 9.8 mg, and the mass ratio of the ferrite magnetic particles to the receptor is 0.3:1.

[0163] Example 9

[0164] The main difference between Example 9 and Example 1 is that:

[0165] The mass percentage of the ferrite magnetic particles in the magnetic member is 10 wt%, the weight of the ferrite magnetic particles is 19.6 mg, and the mass ratio of the ferrite magnetic particles to the receptor is 0.6:1.

[0166] Example 10

[0167] The main difference between Example 10 and Example 1 is that:

[0168] The mass percentage of the ferrite magnetic particles in the magnetic member is 80 wt%, the weight of the ferrite magnetic particles is 156.8 mg, and the mass ratio of the ferrite magnetic particles to the receptor is 4.8:1.

[0169] Comparative Example 1

[0170] An aerosol generating device includes an aerosol article, a base, and an induction coil; the base is provided with a heating chamber for accommodating the aerosol article, and the induction coil surrounds the heating chamber for generating a magnetic field in the heating chamber, and the heating chamber has an opening for taking and placing the aerosol article;

[0171] The aerosol article includes a tube body, a filter tip, a cooling member, and an aerosol generating member. The filter tip, the cooling member, and the aerosol generating member are sequentially fixed in the tube body along the axial direction of the aerosol article. The tube body is a hard paper tube. The material of the filter tip is sponge, the material of the cooling member is cellulose acetate, the outer diameter of the aerosol generating member is 6.4 mm, the axial length is 12 mm. The aerosol generating member includes an aerosol generating matrix and a receptor. The aerosol generating matrix is tobacco paste. The receptor is inserted into the central axis region of the tobacco paste. The receptor is a Fe-Ni-Zr-based magnetic metal sheet with a size of 0.1 mm x 3.83 mm x 11 mm, and the mass of the receptor is 32.4 mg.

[0172] Test method:

[0173] (1) Assemble the aerosol generating devices of Examples 1 to 10 and Comparative Example 1. According to the key bridging role of the magnetoelectric properties of the sensor, establish the relationship between the current in the power supply circuit and the magnetic strength and temperature of the sensor. During the preheating stage, the control system of the aerosol generating device determines whether the aerosol product passes the identification operation by judging whether the behavioral characteristics of the current change in the power supply circuit caused by the change in the sensor temperature conform to the preset change trend. When the identification fails, the aerosol generating device stops preheating and shuts down, and records the identification passing rate of the aerosol product. At the same time, embed a YPS ultra-micro K-type thermocouple thermometer produced by Beijing Youpus Technology Center into the center of the aerosol generation matrix section and contact the sensor, record the temperature data of the sensor during use, the sampling frequency of the data recorder (Keysight 34972A) is 10 Hz, and record the time from when the aerosol product is inserted into the aerosol generating device until it reaches the expected stable heating temperature Tw (set here as 350 °C) as the preheating time. Among them, the preheating time does not count the samples that fail to pass the identification. 200 aerosol generating device samples are configured for testing in each example and comparative example.

[0174] The experimental results are shown in Table 1.

[0175] Table 1

[0176]

[0177]

[0178] Analysis of Examples 1 to 10 and Comparative Example 1 shows that setting a magnetic member containing magnetic particles in the aerosol generating device can improve the recognition rate of aerosol products through the recognition operation of the smoking device. At the same time, it can increase the heating speed of the sensor and shorten the time for the sensor to reach the expected stable operating temperature. The reason may be that magnetic particles can be effectively magnetized in a magnetic field, thus becoming additional magnetic sources. The magnetic field generated by the magnetic particles can couple with the magnetic field generated by the induction coil, enhancing the magnetic field intensity of the magnetic field generated by the aerosol generating device. When there are processing errors, assembly errors, etc. in the sensor, the sensor can still generate a preset magnetic intensity in the magnetic field with enhanced magnetic field intensity, increasing the probability of aerosol products passing through the recognition operation. In addition, the magnetic particles themselves are very fine particles, and the temperature rise of the magnetic particles is not obvious, enabling the magnetic particles to significantly increase the overall magnetism of the aerosol product, but the magnetic particles themselves do not cause obvious eddy current heating effects, allowing the aerosol product to have a strong power input and converting most of this power input into the sensor, increasing the heating speed of the sensor. Additionally, the magnetic particles can reduce the temperature overshoot and magnetic energy loss of the sensor. While constructing more internal magnetic circuits, the magnetic particles reduce the energy loss of the system, stabilizing the stability of the feedback signal of the inductance change. This is conducive to the stable temperature control of the magnetic excitation system. At the same time, the heat generated by the magnetic particles themselves is limited, which can reduce unnecessary heating of nearby components by the magnetic member, making the magnetic field coupling, heating, and operation of nearby components of the entire system more stable, further facilitating the sensor to achieve more stable temperature control, increasing the probability of aerosol products passing through the recognition operation, and the heating speed of the sensor.

[0179] Analysis of Examples 1 - 7 and Examples 8 - 10 shows that controlling the mass of the magnetic particles and the mass ratio of the magnetic particles to the sensor within an appropriate range can further improve the recognition rate of aerosol products through the recognition operation and the heating speed of the sensor.

[0180] The above has introduced the embodiments of the present application in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. At the same time, for those skilled in the art, based on the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. An aerosol generating device, characterized in that: include an induction coil capable of generating a magnetic field when energized; A magnetic member is disposed adjacent to the induction coil, and includes a carrier and magnetic particles dispersed in the carrier, wherein the magnetic particles can be located in the magnetic field.

2. The aerosol generating device according to claim 1, characterized in that: The central axis of the induction coil can pass through the magnetic member.

3. The aerosol generating device according to claim 1, characterized in that: The mass of the magnetic particles is 39.2 mg to 137.2 mg; and / or, The average particle size of the magnetic particles is 1 nm-25000 nm; and / or, The magnetic particles have a positive temperature resistivity; and / or, The Curie temperature of the magnetic particles is 300°C-1000°C; and / or, The magnetic particles include at least one of simple iron, ferrite, iron alloy, modified graphite, modified graphene, simple cobalt, cobalt oxide, cobalt alloy, simple nickel, nickel oxide, and nickel alloy.

4. The aerosol generating device according to claim 1, characterized in that: The magnetic particles are uniformly distributed in the magnetic member; or, The concentration of the magnetic particles on the side of the magnetic member close to the induction coil is greater than the concentration of the magnetic particles on the side of the magnetic member far from the induction coil.

5. The aerosol generating device according to claim 1, characterized in that: The material of the carrier includes a heat-insulating material; and / or, The specific heat capacity of the carrier is 1.0 J / (kg·℃)-2.5 J / (kg·℃); and / or, The density of the carrier is 0.5 g / cm 3 -2.5g / cm 3 .

6. The aerosol generating device according to claim 5, characterized in that: The material of the carrier includes at least one of silica gel, fluorocarbon, cellulose acetate, polypropylene resin, and wood material; or, The material of the carrier is cellulose acetate, and the magnetic element is prepared by spinning a stock solution containing the magnetic particles and cellulose acetate.

7. The aerosol generating device according to any one of claims 1 to 6, characterized in that: The aerosol generating device also includes: an aerosol article having an aerosol generating member, the aerosol generating member comprising a susceptor and an aerosol generating substrate, the susceptor being capable of generating thermal energy in the magnetic field to heat the aerosol generating substrate; A base, wherein the base is provided with a heating chamber for accommodating the aerosol product, and the induction coil surrounds the heating chamber to generate a magnetic field in the heating chamber; The magnetic member is arranged on the base, or the aerosol product also includes the magnetic member, and the magnetic member is arranged adjacent to the aerosol generating member, or the magnetic member includes a first magnetic member and a second magnetic member, the first magnetic member is arranged on the base, and the aerosol product also includes the second magnetic member, the first magnetic member includes the carrier and the magnetic particles, and the second magnetic member includes the carrier and the magnetic particles.

8. The aerosol generating device according to claim 7, characterized in that: When the magnetic member includes the first magnetic member and the second magnetic member, the second magnetic member and the aerosol generating member are disposed adjacent to each other.

9. The aerosol generating device according to claim 7, characterized in that: When the magnetic member includes the first magnetic member and the second magnetic member, the first magnetic member is disposed on the cavity wall of the heating chamber, and the second magnetic member is disposed adjacent to the first magnetic member.

10. The aerosol generating device according to claim 8, characterized in that: The sum of the masses of the magnetic particles in the first magnetic member and the magnetic particles in the second magnetic member is W1, the mass of the receptor is W2, 1.2≤W1 / W2≤4.2; and / or, The sum of the masses of the magnetic particles in the first magnetic member and the magnetic particles in the second magnetic member is 39.2 mg-137.2 mg; and / or, The material of the sensor includes at least one of Tenets alloy, silicon steel, Permalloy, iron-aluminum alloy, Sendai alloy, iron-cobalt alloy, amorphous soft magnetic material, nanocrystalline soft magnetic material, ferrite, and soft magnetic composite material; and / or, The length of the second magnetic member in the axial direction of the aerosol product is 3 mm to 10 mm; and / or, The length of the second magnetic member in the axial direction of the aerosol product is L1, the axial length of the aerosol product is L2, 1:3≤L1 / L2≤1:10; and / or, The length of the second magnetic member in the axial direction of the aerosol product is L1, the length of the aerosol generating substrate in the axial direction of the aerosol product is L3, 1:1≤L1 / L3≤1:5; and / or, The magnetic particles are uniformly distributed in the second magnetic member, or the concentration of the magnetic particles in the second magnetic member close to the aerosol generating member is greater than the concentration of the magnetic particles in the second magnetic member away from the aerosol generating member; and / or, The Curie temperature of the magnetic particles is lower than the Curie temperature of the susceptor; and / or, The distance between the second magnetic member and the sensor is greater than 0 and less than or equal to 10 mm; and / or, The aerosol product also includes a tube body, a filter and a cooling element, wherein the filter, the cooling element, the aerosol generating element and the second magnetic element are located in the tube body, and the filter, the cooling element and the aerosol generating element are arranged in sequence along the axial direction of the tube body; the second magnetic element is located on a side of the aerosol generating element close to the cooling element, or the second magnetic element is located on a side of the aerosol generating element away from the cooling element, or the number of the second magnetic elements is two, and the two second magnetic elements are distributed on both sides of the aerosol generating element along the axial direction of the tube body.

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