Aerosol generating device and aerosol generating article, heat generating assembly and susceptor

Abstract

The present invention relates to an aerosol generating apparatus and aerosol-generating article therefor, a heat generating assembly, and a susceptor. The susceptor includes a single layer of inductive material, which generates heat under the action of a changing magnetic field and changes its magnetic permeability based on the temperature of the susceptor. The heat generating assembly includes the susceptor described above and a coil surrounding the susceptor for generating a magnetic field. The aerosol generating apparatus includes the heat generating assembly described above. The susceptor of the present invention uses a single layer of inductive material and has a simple structure. The magnetic permeability of the inductive material changes with temperature, which allows the susceptor to achieve accurate temperature control and contributes to improving the heat generating efficiency of the susceptor.

Description

[Technical Field]

[0001] The present invention relates to the field of atomization, and in particular to aerosol generating devices and aerosol generating articles, heat generating assemblies and susceptors thereof. [Background technology]

[0002] Currently, the heating methods of non-combustion heated smoking devices on the market are mainly resistance heating and electromagnetic heating. Of these, electromagnetic heaters have a greater degree of freedom in the placement of the heating element than resistance heaters. Whether they are pin-type, chip-type, or coil-type, in order to accurately control the temperature change range of the heating element, they must be equipped with a temperature measurement wire for temperature feedback, which reduces the flexibility of application of the electromagnetic heating element.

[0003] In the case of electromagnetic heating, if a pin-type, chip-type, or coil-type heating element is used, Heating element It is common to print a temperature measurement film on the outer surface and connect it to the substrate with lead wires to reflect the temperature of the heating element through feedback from the temperature measurement film. This method essentially uses the properties of other materials to indirectly reflect the temperature parameters of the heating element, and there are some drawbacks: heat exchange is delayed due to heat conduction between the temperature measurement film and the heating element, and the temperature measurement film itself has heat capacity. heat During the transmission process, energy is naturally consumed, and the temperature measuring film itself Molding process There are various uncertainties, such as limitations on the manufacturing shape of the heating element due to the size and protection method. When these factors are taken into consideration for the heating element, not only does the fixing of the heating element become more complicated, increasing the structural cost, but the fixing structure also absorbs more energy from the heating element, leading to a decrease in the efficiency of the heating element. Summary of the Invention [Problem to be solved by the invention]

[0004] In view of the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide an aerosol generating device and its aerosol generating article, heat generating assembly and susceptor that are simple in structure and have high heat generation efficiency. [Means for solving the problem]

[0005] The technical solution adopted by the present invention to solve the technical problem is: A susceptor for an aerosol generating device, comprising: The present invention aims to construct a susceptor that includes a single layer of dielectric material that is used to generate heat under the influence of a changing magnetic field and that changes magnetic permeability based on the temperature of the susceptor.

[0006] Preferably, within a preset temperature range, the magnetic permeability of the inductive material changes with temperature.

[0007] Preferably, the preset temperature range is above a first temperature value and below a second temperature value, the second temperature value being below the Curie point temperature of the dielectric material.

[0008] Preferably, in said preset temperature range, the magnetic permeability of said dielectric material also increases gradually with increasing temperature.

[0009] Preferably, in said preset temperature range, the magnetic permeability of said dielectric material decreases gradually with increasing temperature.

[0010] Preferably, the inductive material comprises a soft magnetic material.

[0011] Preferably, the soft magnetic material has a Curie point temperature of less than 800°C.

[0012] Preferably, the susceptor has a sheet-like shape, and includes a sheet-like first main body portion and a first pointed portion connected to the tip of the first main body portion.

[0013] Preferably, the susceptor is tubular in shape.

[0014] Preferably, the susceptor has a cylindrical shape, and includes a cylindrical second main body portion and a second pointed portion connected to the tip of the second main body portion.

[0015] Preferably, the susceptor material includes 1j85 material.

[0016] Preferably, the susceptor material includes 1j77 material.

[0017] The present invention also provides A heat generating assembly is constructed that includes the susceptor described above and a coil surrounding the susceptor for generating a magnetic field.

[0018] The present invention also provides an aerosol-generating article comprising an aerosol-generating matrix and a susceptor as described above for heating the aerosol-generating matrix.

[0019] The present invention also provides an aerosol generating device comprising a power supply assembly and the heat generating assembly or the aerosol generating article described above, wherein the power supply assembly is used to drive the susceptor to generate heat. [Effects of the Invention]

[0020] The implementation of the present invention provides the following beneficial effects: The susceptor of the present invention uses a single layer of dielectric material and has a simple structure, and the magnetic permeability of the dielectric material changes with temperature, which allows the susceptor to achieve accurate temperature control and contributes to improving the heat generation efficiency of the susceptor. [Brief explanation of the drawings]

[0021] The present invention will now be further described with reference to the drawings and examples. [Figure 1] 1 is a structural schematic diagram of a first embodiment of a susceptor of the present invention. [Figure 2] FIG. 4 is a structural schematic diagram of a second embodiment of the susceptor of the present invention. [Figure 3] FIG. 4 is a structural schematic diagram of a third embodiment of the susceptor of the present invention. [Figure 4] FIG. 2 is a schematic diagram showing the magnetic permeability and temperature change of the susceptor material of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0022] In order to more clearly understand the technical features, objectives and effects of the present invention, specific embodiments of the present invention will be described in detail with reference to the drawings. In the following description, the orientations or positional relationships indicated by "front", "rear", "up", "down", "left", "right", "longitudinal", "lateral", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are configured and operate in specific orientations based on the orientations or positional relationships shown in the drawings, and are intended to facilitate the description of the present technical solution, but do not indicate that the indicated devices or elements must have a specific orientation, and therefore should not be understood as limiting the present invention.

[0023] Furthermore, unless otherwise expressly specified and limited, terms such as "attach," "couple," "connect," "fix," and "provide" should be understood in a broad sense, for example, to mean a fixed connection, a detachable connection, or integration, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, internal communication between two elements, or an interactive relationship between two elements. When an element is said to be "above" or "below" another element, the element may be "directly" or "indirectly" located on the other element, or there may be one or more intervening elements. Terms such as "first," "second," and "third" are used to facilitate the description of the technical solution and should not be understood to indicate or imply relative importance or the number of technical features shown. Therefore, a feature qualified as "first," "second," "third," etc. may explicitly or implicitly include one or more of the features. The specific meaning of the above terms in the present invention can be understood by those skilled in the art depending on the context.

[0024] In the following description, for purposes of explanation and not limitation, specific details are set forth, such as specific system configurations and techniques, to provide a thorough understanding of embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments that do not include these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0025] The core of the problem that exists in electromagnetic heating, which is the subject of the present invention, is mainly the susceptor itself.

[0026] The basic principle of electromagnetic heating is that a changing current passes through an electromagnetic coil to create a changing magnetic field, which acts on the susceptor, generating eddy currents in the susceptor body and converting them into heat. An actual electromagnetic coil body has certain attribute parameters, such as inductance, AC resistance, linear resistance, quality factor, etc. When a susceptor is placed within the influence range of the electromagnetic coil, these parameters, except for linear resistance, vary depending on the susceptor's position, size and material of the susceptor, the volume within the influence range, and the temperature of the influence range.

[0027] The magnetic properties of the material of the electromagnetic heating susceptor directly affect the heating rate and efficiency of the susceptor. For metals with better magnetic properties, the material of the susceptor of the present invention is a soft magnetic material. The important characteristic parameter for describing soft magnetic materials is magnetic permeability, and changes in the characteristic parameters of the electromagnetic coil are directly related to the magnetic permeability of the susceptor.

[0028] For typical susceptors, a key factor limiting their flexible use and configuration is the need for external temperature measurement. On the other hand, some soft magnetic materials have a magnetic permeability that changes with the temperature of the body. This allows temperature changes to be converted into changes in magnetic permeability, which in turn converts into changes in the electrical parameters of the coil itself, and then converts changes in temperature into changes in the electrical parameters of the coil itself. Simply measuring the changes in the electrical parameters of the coil allows the temperature value of the heat generated to be calculated from the measured values, forming a complete temperature feedback link that can control the temperature of the susceptor. Based on this, the present invention simplifies the entire process of susceptor temperature measurement, manufacturing, and fixing by designing a susceptor made of a single soft magnetic functional material for the purpose of a temperature feedback mechanism based on the soft magnetic material.

[0029] 1 to 3 illustrate a susceptor 1 for an aerosol generating device according to some embodiments of the present invention. The susceptor 1 includes a single layer of an inductive material that generates heat under the action of a changing magnetic field and changes its magnetic permeability based on the temperature of the susceptor. In some embodiments, within a predetermined temperature range, the inductive material's magnetic permeability changes with temperature, and a relationship is established between the temperature change characteristics of the material and the change in magnetic permeability, both of which may be linear or nonlinear. The predetermined temperature range may be above a first temperature value and below a second temperature value, the second temperature value being lower than the Curie point temperature of the inductive material. Within this predetermined temperature range, the magnetic permeability of the temperature-sensitive layer changes with temperature, so that each magnetic permeability can have a corresponding temperature value, thereby enabling the temperature change to be obtained from the change in magnetic permeability.

[0030] In some embodiments, within a preset temperature range, the magnetic permeability of the dielectric material may gradually decrease as the temperature gradually increases, while in other embodiments, within a preset temperature range, the magnetic permeability of the dielectric material may gradually increase as the temperature gradually increases.

[0031] In some embodiments, the inductive material may be a soft magnetic material, which has a Curie temperature point. The usable range for the aerosol-generating matrix is within 500°C. Studies of various soft magnetic materials have shown that some materials do not exhibit a significant change in magnetic permeability with temperature below their Curie temperature point. The temperature Only at temperatures close to the Curie point Permeability The change with temperature becomes apparent. However, there are also materials whose magnetic permeability gradually decreases with increasing temperature below the Curie temperature point, and this change in parameter characteristic is exactly what is needed to put the present invention into practical use. In general, the Curie point temperature of the soft magnetic material of the susceptor 1 is less than 800°C, and the Curie point temperature of the inductive material used is preferably about 400°C.

[0032] 4, specifically, the soft magnetic material of the susceptor 1 has a first temperature change point 101 and a second temperature change point 102. The temperatures of the first temperature change point 101 and the second temperature change point 102 are both lower than the Curie point 100. The temperature corresponding to the first temperature change point 101 may be set as the first temperature value, and the temperature corresponding to the second temperature change point 102 may be set as the second temperature value. Until the temperature of the soft magnetic material of the susceptor 1 reaches the first temperature change point 101, the magnetic permeability of the soft magnetic material of the susceptor 1 hardly changes. When the temperature of the soft magnetic material of the susceptor 1 reaches the first temperature change point 101 and continues to rise, the magnetic permeability of the soft magnetic material begins to decrease gradually and regularly with the increase in temperature. When the temperature rises to the second temperature change point 102, the rate of change of the magnetic permeability of the soft magnetic material begins to decrease. When the temperature reaches the Curie point 100 of the material, the magnetic permeability decreases to zero or remains unchanged, at which point the material of the susceptor 1 completely loses its magnetic properties.

[0033] In some embodiments, the shape of the susceptor 1 can be a sheet, a tube, a cylinder, etc., but is not limited thereto.

[0034] The present invention also provides a heat generating assembly including the susceptor 1 described above and a coil for generating a magnetic field surrounding the susceptor 1. The heat generating assembly further includes a fixing base 5 provided below the susceptor 1 for fixing the susceptor 1. The present invention also provides an aerosol-generating matrix and a heating element for heating the aerosol-generating matrix. 1 and constructing an aerosol-generating article comprising:

[0035] The present invention also provides an aerosol-generating device comprising a power supply assembly and the above-described heat-generating assembly or the above-described aerosol-generating article, wherein the power supply assembly is used to drive the susceptor to generate heat and may include a battery. The aerosol-generating device may also include a casing, a heat-generating assembly disposed within the casing, and a battery disposed within the casing and electrically connected to two electrode leads of the heat-generating assembly. The aerosol-generating matrix may be inserted into the casing from its top. The upper end of the heat-generating assembly is inserted into the aerosol-generating matrix, and after powering on and heating, the aerosol-generating matrix is heated and baked, forming an aerosol that can be inhaled by the user.

[0036] 1 shows a susceptor 1 according to a first embodiment of the present invention. In this embodiment, the susceptor 1 is sheet-shaped and includes a sheet-shaped first main body 11 and a first pointed portion 12 connected to the tip of the first main body 11. The first main body 11 has a rectangular sheet structure, and the first pointed portion 12 has a triangular sheet structure. The length of the base of the first pointed portion 12 is the same as the length of the short side of the first main body, and the first main body 11 and the first pointed portion 12 may be integrally molded.

[0037] Furthermore, the susceptor 1 in this embodiment is made of 1J85 material. In accordance with the electromagnetic environment requirements for the skin effect of the susceptor 1, the susceptor 1 is manufactured as a chip-type component using pressed sheet-like soft magnetic 1J85 material. One end of the susceptor 1 is fixed to the fixing base 5 of the aerosol generator, and the other end is chamfered to easily guide the insertion of the aerosol-generating matrix. The Curie point of this material is approximately 400°C. The susceptor 1 is placed at the induction center of the electromagnetic coil. After the aerosol-generating matrix is inserted, a high-frequency current is connected to the coil. When the temperature reaches 150°C, the temperature of the first temperature change point 101, the magnetic permeability of the susceptor 1 begins to gradually and regularly decrease, and the electrical parameters of the coil change accordingly. The current temperature of the susceptor 1 can be estimated by acquiring the electrical parameters through a circuit and performing data processing and matching. The alternating current has certain characteristics that can be used to detect the temperature of the susceptor 1 in real time. Typically, the aerosol occurrence When heating the matrix, the target temperature of the susceptor 1 is approximately 300°C. This target temperature is lower than the temperature of the second temperature change point 102 of the material. For example, the temperature of the second temperature change point 102 is 380°C. Therefore, during the process of heating the susceptor 1 from the first temperature change point 101 to the target temperature of 300°C, the relationship between the temperature and permeability of the susceptor 1 changes regularly, ensuring a one-to-one correspondence between temperature and permeability. Therefore, the permeability of the induction material changes regularly with temperature, and therefore, within this temperature range, a temperature value corresponding to each permeability can be obtained, and temperature control accuracy within 1°C can be achieved.

[0038] FIG. 2 shows a susceptor 1 according to a second embodiment of the present invention. The shape of the susceptor 1 is hollow and tubular. Furthermore, the material of the susceptor 1 in this embodiment is 1J85 material. To meet the requirements of the electromagnetic environment for the susceptor's skin effect, the susceptor 1 is made of a pressed sheet of soft magnetic 1J85 material, formed into a tubular part with a diameter of approximately 7 mm and a length of approximately 12 mm. One end of the tubular part is fixed to a guide member to facilitate the insertion of the aerosol-generating matrix. This material has a Curie point of approximately 400°C. The susceptor 1 is placed at the induction center of an electromagnetic coil. After the aerosol-generating matrix is inserted, a high-frequency current is connected to the coil. When the temperature reaches 150°C, the temperature of the first temperature change point 101, the magnetic permeability of the susceptor 1 begins to decrease gradually and regularly, and the electrical parameters of the coil change accordingly. The current temperature of the susceptor 1 can be estimated by acquiring the electrical parameters through a circuit and performing data processing and matching. AC current has certain characteristics that can be used to detect the temperature of the susceptor 1 in real time. Typically, when heating an aerosol-generating matrix, the target temperature of the susceptor 1 is approximately 300°C. Because this target temperature is lower than the temperature of the second temperature change point 102 of the material (for example, the temperature of the second temperature change point 102 is 380°C), the relationship between the temperature and permeability of the susceptor 1 changes regularly during the process of heating the susceptor 1 from the first temperature change point 101 to the target temperature of 300°C, ensuring a one-to-one correspondence between temperature and permeability. Therefore, the permeability of the inductive material changes regularly with temperature, allowing for temperature values corresponding to each permeability within this temperature range to be obtained, achieving temperature control accuracy within 1°C.

[0039] 3 shows a susceptor according to a third embodiment of the present invention. The shape of the susceptor 1 may be a hollow cylinder, and this susceptor 1 is a roughly needle-shaped susceptor, and includes a cylindrical second main body portion 13 and a second pointed portion 14 connected to the tip of the second main body portion 13. 2 Main body 13 has a cylindrical structure and 2 tip 14 has a cone-shaped structure and 2 Main body 13and has the same base area as the top area of 2 Main body 13 and 2 tip 14 The shape of the susceptor 1 is not limited here, but it is understood that it may be rectangular, rod-like, or the like.

[0040] Furthermore, the susceptor 1 in this embodiment is made of 1J77 material. According to the design requirements for the needle-shaped susceptor 1, the susceptor 1 is made of CNC-machined soft magnetic 1J77 rod material, which has higher heating efficiency, and is shaped into a pin-shaped member with a diameter of 2 mm and a length of 12 mm. One end of the susceptor is fixed to the fixing base 5 of the aerosol generator, and the other end is chamfered to facilitate the insertion of the aerosol-generating matrix. The Curie point of this material is approximately 400°C. The susceptor 1 is placed at the induction center of the electromagnetic coil. After the aerosol-generating matrix is inserted, a high-frequency current is connected to the coil. When the temperature reaches 160°C, the temperature of the first temperature change point 101, the magnetic permeability of the susceptor 1 begins to gradually and regularly decrease, and the electrical parameters of the coil change accordingly. The current temperature of the susceptor 1 can be estimated by acquiring the electrical parameters through a circuit and performing data processing and matching. The alternating current has certain characteristics that can be used to detect the temperature of the susceptor 1 in real time. Typically, the aerosol occurrence When heating the matrix, the target temperature of the susceptor 1 is approximately 300°C. This target temperature is lower than the temperature of the second temperature change point 102 of the material. For example, the temperature of the second temperature change point 102 is 360°C. Therefore, during the process of heating the susceptor 1 from the first temperature change point 101 to the target temperature of 300°C, the relationship between the temperature and the permeability of the susceptor 1 changes regularly, ensuring a one-to-one correspondence between temperature and permeability. Therefore, the permeability of the induction material changes regularly with temperature, and therefore, within this temperature range, a temperature value corresponding to each permeability can be obtained, and the temperature control accuracy can be within 1°C.

[0041] The susceptor of the present invention uses a single layer of sensing material and has a simple structure, and the magnetic permeability of the sensing material changes with temperature, which allows the susceptor to achieve accurate temperature control and contributes to improving the heating efficiency of the susceptor.

[0042] It should be understood that the above examples merely illustrate preferred embodiments of the present invention, and although the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. Those skilled in the art can freely combine the above technical features and make some modifications and improvements without departing from the concept of the present invention, all of which fall within the scope of the present invention. Therefore, all equivalent variations and modifications made in accordance with the claims of the present invention are intended to be included within the scope of the claims of the present invention.

Claims

1. A susceptor for an aerosol generating device, comprising:

1. A susceptor comprising a single layer of dielectric material, the dielectric material adapted to generate heat under the action of a changing magnetic field and to change magnetic permeability based on the temperature of the susceptor.

2. 2. The susceptor of claim 1, wherein the magnetic permeability of the dielectric material changes with temperature within a preset temperature range.

3. 3. The susceptor of claim 2, wherein the predetermined temperature range is greater than or equal to a first temperature value and less than or equal to a second temperature value, the second temperature value being less than a Curie point temperature of the dielectric material.

4. 4. The susceptor of claim 3, wherein, within the predetermined temperature range, the magnetic permeability of the dielectric material increases gradually with increasing temperature.

5. 4. The susceptor of claim 3, wherein, within the preset temperature range, the magnetic permeability of the dielectric material decreases gradually with increasing temperature.

6. The susceptor of claim 2 , wherein the inductive material comprises a soft magnetic material.

7. 7. The susceptor of claim 6, wherein the soft magnetic material has a Curie point temperature of less than 800°C.

8. The susceptor according to claim 1, characterized in that the shape of the susceptor is sheet-like, and the susceptor includes a sheet-like first main body portion and a first tip portion connected to the tip of the first main body portion.

9. The susceptor of claim 1 , wherein the susceptor is tubular in shape.

10. The susceptor of claim 1, wherein the susceptor is cylindrical in shape and includes a cylindrical second main body portion and a second tip portion connected to the tip of the second main body portion.

11. 10. The susceptor of claim 8 or 9, wherein the material of the susceptor includes 1j85 material.

12. The susceptor of claim 10 , wherein the susceptor material comprises a 1j77 material.

13. 1. A heat generating assembly comprising: A heat generating assembly comprising: a susceptor according to any one of claims 1 to 12; and a coil surrounding the susceptor for generating a magnetic field.

14. An aerosol-generating article, comprising:

13. An aerosol-generating article comprising an aerosol-generating matrix and a susceptor according to any one of claims 1 to 12 for heating the aerosol-generating matrix.

15. An aerosol generating device, comprising: An aerosol generating device comprising a power supply assembly and the heat generating assembly of claim 13 or the aerosol generating article of claim 14, wherein the power supply assembly is used to drive the susceptor to generate heat.

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