Aerosol generating device and coil assembly thereof

Abstract

The invention provides an aerosol generating device and a coil assembly thereof, the coil assembly comprises a ceramic base body and a conductive heating body, the ceramic base body defines a heating cavity, and the heating cavity is used for accommodating an aerosol forming substrate; and the conductive heating body is arranged on the ceramic substrate, and is used for heating the aerosol forming substrate to generate aerosol. According to the coil assembly, the co-fired ceramic coil and the integrated design of the coil and the heating cavity are adopted, the distance between the coil and the cigarette is closer, meanwhile, a heating cavity base body is a ceramic base body, the heat conduction capacity is higher, heat generated by the coil can be better transmitted to a tobacco section, and effective utilization of the heat is facilitated.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of novel tobacco, and particularly relates to an aerosol generating device and a coil assembly thereof. BACKGROUND

[0002] The electromagnetic induction heating technology is applied to the low-temperature cigarette heating field due to its high heating efficiency. The electromagnetic induction heating system generally comprises an inductor coil, a resonance control circuit and a magnetic induction heating element. The alternating current generated by the resonance control circuit system flows through the coil, and the magnetic induction heating element generates heat due to the magnetic hysteresis loss and eddy current effect. The magnetic induction heating element can be arranged inside or outside the tobacco segment of the cigarette, and the heat generated by the magnetic induction heating element is used to roast and heat the smoking material to generate an aerosol for smoking.

[0003] At present, the inductor coil is generally formed by spirally winding a conductor material outside the heating cavity. The conductor material is generally a multi-strand coil, and the multi-strand coil has the following problems.

[0004] (1) The volume is large, which is not conducive to the miniaturization design of the appliance;

[0005] (2) The multi-strand coil is prone to dimensional deviation during winding and installation, which makes it difficult to ensure the consistency and uniformity of the coil performance;

[0006] (3) Since the inside of the heating cavity is a high-temperature environment, and the multi-strand coil generally has a maximum temperature resistance of 150℃, the long-term high-temperature environment can affect the stability of the coil;

[0007] (4) In the electromagnetic induction heating system, the coil generates a certain amount of heat due to its own resistance. The multi-strand coil is generally wound outside the heating cavity, and the heating cavity material generally has low thermal conductivity. Moreover, the coil and the cigarette are separated by the heating cavity, and the distance is far. Therefore, the heat generated by the coil itself cannot be effectively absorbed and utilized by the cigarette, resulting in low heat utilization rate.

[0008] Therefore, how to provide a coil structure that can reduce the volume of the coil, improve the high-temperature resistance performance, consistency and uniformity, and better utilize the self-heating heat of the coil to improve the electromagnetic heating energy utilization rate is a problem that needs to be solved by those skilled in the art. SUMMARY

[0009] Therefore, the present application aims to provide an aerosol generating device and a coil assembly thereof to solve the above problems.

[0010] To solve the above technical problems, the present application adopts the following technical solutions:

[0011] In a first aspect, the present application provides a coil assembly of an aerosol-generating device, the aerosol-generating device comprising a control assembly, the control assembly transmitting an electrical signal to the coil assembly through an electrical connection, the coil assembly comprising a ceramic base and an electrically conductive heating body, the ceramic base enclosing a heating cavity, the heating cavity being configured to receive an aerosol-forming substrate; the electrically conductive heating body being disposed on the ceramic base, the electrically conductive heating body heating the aerosol-forming substrate to generate an aerosol.

[0012] Further, the electrically conductive heating body is disposed at at least one of an inner surface, an outer surface and an intermediate region of the ceramic base.

[0013] Further, the heating cavity is a cylinder, an inner diameter of the heating cavity is less than 9 mm, an outer diameter of the heating cavity is less than 16 mm, a wall thickness of the heating cavity is 0.1-5 mm, and a height of the heating cavity is 5-30 mm.

[0014] Further, the electrically conductive heating body is a metal heating paste.

[0015] Further, the metal heating paste is one or more of tungsten, manganese, molybdenum, gold, silver, copper, rhenium, palladium, niobium, tantalum, aluminum, chromium, iron, silicon, titanium, zinc, carbon, nickel, cobalt, carbon, boron, etc.

[0016] Further, the metal heating paste has a resistance less than 1.5 Ω and a temperature coefficient of resistance less than 2000 ppm / °C.

[0017] Further, the ceramic base is an oxide ceramic base, a silicon nitride ceramic base or a carbide ceramic base.

[0018] Further, the electrically conductive heating body has a number of turns of spiral printing of 3-18.

[0019] Further, the electrically conductive heating body has a coating thickness of 0.01-0.5 mm and a width of 0.1-5 mm.

[0020] In a second aspect, the present application provides an aerosol-generating device, the aerosol-generating device comprising the coil assembly described above.

[0021] The aerosol-generating article is preferably a smoking article comprising an aerosol-forming substrate which, by heating, generates an aerosol which is directly inhalable by a user into the user's lungs through the user's mouth.

[0022] Preferably, the aerosol-forming substrate is a solid aerosol-forming substrate. The aerosol-forming substrate can comprise both solid and liquid components.

[0023] Preferably, the aerosol-forming substrate comprises nicotine. In some preferred embodiments, the aerosol-forming substrate comprises tobacco.

[0024] Preferably, each susceptor is located within a plug in direct contact with the aerosol-forming material.

[0025] A susceptor refers to a material that can convert electromagnetic energy into heat. When located in a fluctuating electromagnetic field, eddy currents induced in the susceptor cause heating of the susceptor. When an elongate susceptor is positioned in thermal contact with an aerosol-forming substrate, the aerosol-forming substrate is heated by the susceptor.

[0026] An aerosol-generating article is designed to engage with an electrically operated aerosol-generating device comprising an inductive heating source. The inductive heating source or inductor generates a fluctuating electromagnetic field in order to heat a susceptor located within the fluctuating electromagnetic field. In use, engagement of the aerosol-generating article with the aerosol-generating device locates the susceptor within the fluctuating electromagnetic field generated by the inductor.

[0027] The length dimension of the susceptor is dimensionally greater than its width dimension or its thickness dimension, for example greater than twice its width dimension or its thickness dimension. The susceptor can therefore be described as an elongate susceptor. The susceptor can be arranged generally longitudinally within the aerosol-forming substrate.

[0028] This means that the length dimension of the elongate susceptor is arranged approximately parallel to the longitudinal direction of the aerosol-forming substrate, for example within plus or minus 10 degrees of parallel to the longitudinal direction of the aerosol-forming substrate.

[0029] In preferred embodiments, the elongate susceptor can be located at a radially central position within the aerosol-forming substrate and extend along the longitudinal axis of the aerosol-forming substrate.

[0030] The susceptor can be made of any material that can be inductively heated to a temperature sufficient to cause the aerosol-forming substrate to generate an aerosol. Preferred susceptors comprise a metal or carbon.

[0031] Preferred susceptors can comprise a ferromagnetic material, for example ferrite, ferromagnetic steel or stainless steel. Suitable susceptors can be aluminium or can comprise aluminium. Preferred susceptors can be made of a 400 series stainless steel, for example a 410 grade, 420 grade or 430 grade stainless steel.

[0032] Different materials will consume different amounts of energy when placed in an electromagnetic field having similar frequency and field strength values. The parameters of the susceptor, for example the material type, length, width and thickness, can therefore be varied to provide the required energy consumption within a known electromagnetic field.

[0033] Preferred susceptors can be heated to temperatures in excess of 250 degrees Celsius. Suitable susceptors can comprise a non-metallic core with a metal layer arranged on the non-metallic core, for example a metal track formed on a surface of a ceramic core.

[0034] The susceptor can have an outer protective layer, for example a ceramic protective layer or a glass protective layer that encapsulates the elongate susceptor, thereby forming a complete heater. The susceptor can comprise a protective coating formed of glass, ceramic or inert metal, formed on a core of susceptor material.

[0035] The susceptor is arranged in thermal contact with the aerosol-forming substrate. Thus, when the susceptor is heated, the aerosol-forming substrate is heated and an aerosol is formed.

[0036] In one embodiment, the heater comprising the susceptor is inserted into the aerosol-forming substrate, the aerosol-generating device can comprise a single or multiple elongate heaters.

[0037] In another embodiment, the aerosol-forming substrate can comprise the susceptor.

[0038] Alternatively, the aerosol-forming substrate can comprise a plurality of susceptors, the susceptors can be in the form of an elongate shape, a granular shape, a mesh shape, a radial shape, a tubular shape, an hourglass shape, a helical shape, etc.

[0039] The aerosol-generating device is capable of generating an oscillating electromagnetic field of between about 1 MHz and 30 MHz, for example between 2 MHz and 10 MHz, for example between 5 MHz and 7 MHz, by means of an induction coil of an induction emitter.

[0040] Preferably, the aerosol-generating device is capable of generating an oscillating electromagnetic field having a field strength (H-field) of between 1 kA / m and 5 kA / m, for example between 2 kA / m and 3 kA / m, for example about 2.5 kA / m.

[0041] The aerosol-generating device is a portable or handheld aerosol-generating device that a user can hold comfortably between the fingers of a single hand. The aerosol-generating device can be substantially cylindrical in shape. The aerosol-generating device can have a length of between about 70 millimetres and about 120 millimetres.

[0042] The aerosol-generating device is used to illustrate a device that interacts with an aerosol-forming substrate of an aerosol-generating article to generate an aerosol.

[0043] Preferably, the aerosol-generating device is a heated smoking article that interacts with an aerosol-forming substrate of an aerosol-generating article to generate an aerosol that is directly inhalable by a user into the user's lungs through the user's mouth.

[0044] The power supply can be any suitable power supply, for example a direct current voltage source such as a battery. In one embodiment, the power supply is a lithium-ion battery. Alternatively, the power supply can be a nickel-metal hydride battery, a nickel-cadmium battery or a lithium-based battery, for example a lithium-cobalt, lithium-iron-phosphate, lithium-titanate or lithium-polymer battery.

[0045] The control element can be a simple switch. Alternatively, the control element can be a circuit and may include one or more microprocessors or microcontrollers.

[0046] An aerosol generation system may include an aerosol generation device and one or more aerosol generation articles, wherein the aerosol generation device is configured with a corresponding number of coil assemblies to house the aerosol generation articles.

[0047] As can be seen from the above technical solution, the advantages and positive effects of the aerosol generating device and heating chamber proposed in this application are as follows:

[0048] 1. This application adopts a co-fired ceramic coil with an integrated design of the coil and heating chamber, which brings the coil closer to the cigarette. At the same time, the heating chamber substrate is a ceramic substrate with stronger thermal conductivity. This allows the heat generated by the coil itself to be better transferred to the tobacco section, which is conducive to the effective utilization of heat.

[0049] 2. The integrated design of the coil and heating chamber helps to reduce the overall volume and utilizes the miniaturized design of the aerosol generation device.

[0050] 3. The heating chamber substrate is made of ceramic, which provides better high-temperature stability.

[0051] 4. The coil is printed with heating paste on the ceramic substrate, which can effectively avoid dimensional deviations during coil winding and installation, and improve the consistency and uniformity of coil performance.

[0052] 5. The integrated co-fired ceramic coil design results in a coil thickness that is smaller than that of multi-strand coils, a larger equivalent cross-sectional area, and lower resistance. This leads to less resistance loss and higher energy utilization. Attached Figure Description

[0053] The above description of this application and the following detailed embodiments will be better understood when read in conjunction with the accompanying drawings. It should be noted that the drawings are merely examples of the claimed technical solutions.

[0054] Figure 1 This is a structural diagram of the aerosol generating apparatus provided in this application;

[0055] Figure 2 This is a perspective view of the ceramic substrate of the coil assembly provided in this application;

[0056] Figure 3 This is a planar development view of the ceramic substrate of the coil assembly provided in this application.

[0057] The reference numerals in the attached figures are explained as follows:

[0058] Aerosol generating device: 10;

[0059] Coil assembly: 11;

[0060] Conductive heating element: 11a;

[0061] Ceramic matrix: 11b;

[0062] Power supply: 12;

[0063] Control components: 13;

[0064] Heating chamber: 14;

[0065] Aerosol forming matrix: 20;

[0066] Receptor: 20a. Detailed Implementation

[0067] The detailed features and advantages of this application are described below in the specific embodiments. The content of this description is sufficient to enable any person skilled in the art to understand the technical content of this application and implement it accordingly. Based on the specification, claims and drawings disclosed in this specification, a person skilled in the art can easily understand the related objectives and advantages of this application.

[0068] The invention will now be described with reference to the accompanying drawings, in which similar reference numerals denote similar elements. While specific structures and arrangements are discussed, it should be understood that this is done merely for illustrative purposes. Those skilled in the art will recognize that other structures and arrangements can be used without departing from the spirit and scope of the invention. It will be apparent to those skilled in the art that the invention can also be used in a variety of other applications.

[0069] In this specification and claims, several terms will be used, and unless otherwise indicated, these terms will be defined to have the following meanings:

[0070] The singular forms “a” and “the” include their corresponding plural forms. “At least one” means one or more, and “more” means two or more. “At least one of the following” or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can be expressed as: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0071] All figures used to represent component amounts, properties (e.g., molecular weight), reaction conditions, etc., should be considered to be modified in all cases by the terms "within the unavoidable margin of error" or "about". Therefore, the numerical values ​​set forth herein are approximate and may vary depending on the desired properties sought to be obtained by the present invention. The principle of equivalents, which is applied to a minimum and not intended to limit the scope of the claims, should be applied, for example, each value should be interpreted at least according to the reported significant digits and by applying conventional rounding techniques.

[0072] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural. Additionally, the character " / " in this article generally indicates an "or" relationship between the preceding and following related objects, but it can also represent an "and / or" relationship. Please refer to the context for a more accurate understanding.

[0073] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed during use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0074] Unless otherwise indicated, the following abbreviations have the following meanings, and any other abbreviations used herein but not defined have their generally accepted standard meanings:

[0075] All other terms used herein for special definition are intended to have the general meaning understood by one of ordinary skill in the art, and in particular, meaning that one of ordinary skill in the art, upon reading the claims, specification and drawings of this patent, can directly and without doubt determine how the technical solution of this patent can be implemented.

[0076] Even if there are incomplete descriptions, omissions, or ambiguities in the grammar, words, punctuation, graphics, symbols, etc. of the claims, specification, and drawings of this patent, a person skilled in the art can still arrive at the only correct understanding by reading the claims, specification, and drawings as a whole without extensive reasoning or experimentation, and effectively exclude various incorrect interpretations that are not aimed at achieving the purpose of this patent.

[0077] Those skilled in the art would first choose to read the claims, specification, and drawings of this patent to reasonably interpret the terms; secondly, they would choose to refer to the relevant definitions in other documents published by the applicant before the filing date to reasonably interpret the terms; thirdly, they would choose the references cited in this patent to reasonably interpret the terms; and finally, they would choose to combine the technical dictionaries, technical manuals, reference books, textbooks, national or industry technical standards, etc., commonly used by those skilled in the art to reasonably interpret the terms.

[0078] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0079] Please refer to Figure 1 This application provides an aerosol generating device 10, which may include: a coil assembly 11, a power supply 12 and a control assembly 13. The coil assembly 11 is used to heat the aerosol forming matrix 20 contained in the heating chamber 14 during operation to generate aerosol. The control assembly 13 controls the power supply 12 to provide electrical energy to the coil assembly 11 according to the heating operating parameters.

[0080] The coil assembly 11 serves as the heating space for the aerosol forming matrix 20. Its internal environment is calculated to ensure that the matrix can be uniformly and efficiently converted into aerosols during heating. The power supply 12, as the power source for the aerosol generating device 10, continuously provides electrical energy to the entire system. Its stability and efficiency directly affect the heating effect.

[0081] The coil assembly 11 is responsible for generating a magnetic field from electrical energy, which, together with the sensor 20a, heats the aerosol forming matrix 20. It employs advanced heating technology and materials, enabling precise temperature control while rapidly heating up, avoiding overheating that could damage the matrix, thus preserving the matrix's flavor and texture.

[0082] The coil assembly 11 of this application, in conjunction with the sensor 20a disposed outside the aerosol forming matrix 20, forms an external heating method. External heating heats the matrix through heat conduction or radiation. External heating typically involves designing a specific heating cavity or tubular body to contain the aerosol forming matrix 20. The coil assembly 11 is disposed outside the heating cavity 14 or tubular body.

[0083] External heating can also be combined with structures such as heat insulation pipes and support frames to improve the uniformity and stability of heating. External heating avoids direct contact between the sensor 20a and the aerosol forming matrix 20, reducing contamination and damage to the sensor 20a from the matrix. Through proper design of the heating chamber 14 and the heat insulation structure, uniform heating of the matrix can be achieved, improving the quality of aerosol formation.

[0084] This application can also be internal heating, which means that the sensor 20a is at least partially located inside the aerosol forming matrix 20 and directly heats the aerosol forming matrix 20.

[0085] Additionally, auxiliary structures such as a heat spreader layer and a dielectric layer can be added as needed to improve heating uniformity and efficiency. Because the sensor 20a is in closer contact with the matrix, the required heating temperature can be reached more quickly. The internal heating method allows for more direct heating of the aerosol-generating matrix, improving heating efficiency.

[0086] The coil assembly 11 of this application is a heating coil made of metal heating paste, and the control component transmits a heating signal to the coil assembly 11 through an electrical connection.

[0087] The control component 13 is the intelligent control center of the entire aerosol generating device 10. It can adjust the amount of electrical energy supplied by the power supply 12 to the coil assembly 11 according to preset heating parameters, such as target temperature and heating time, to achieve precise temperature control. Simultaneously, it can monitor the heating status in real time through built-in sensors, responding and adjusting promptly to abnormal situations to ensure a stable and safe heating process.

[0088] Please refer to Figure 2 and Figure 3 The coil assembly 11 of this application specifically includes: a ceramic substrate 11b and a conductive heating element 11a.

[0089] The ceramic substrate 11b encloses a heating cavity 14, which is used to contain the aerosol forming matrix 20. A conductive heating element 11a is disposed on the ceramic substrate 11b and heats the aerosol forming matrix 20 to generate aerosol.

[0090] The control component 13 provides energy to the coil assembly 11, causing the coil surrounding the ceramic substrate 11b to generate a magnetic field, which internally heats the aerosol forming matrix 20 in the heating chamber 14 placed inside the ceramic substrate 11b. The conductive heating element 11a externally heats the aerosol forming matrix 20. The magnetic induction heating sensor 20a can be arranged inside or outside the aerosol forming matrix 20.

[0091] The receptor 20a is preferably needle-shaped, strip-shaped, or leaf-shaped. Preferably, the receptor 20a has a length of 5 mm to 15 mm, for example, between 6 mm and 12 mm or between 8 mm and 10 mm.

[0092] Preferably, the elongated receptor 20a has a length substantially the same as that of the aerosol forming matrix 20. Preferably, the receptor 20a may have a width of 1 mm to 5 mm and a thickness of 0.01 mm to 2 mm, for example, 0.5 mm to 2 mm.

[0093] Preferred embodiments may have a thickness between 10 micrometers and 500 micrometers, more preferably between 10 micrometers and 100 micrometers. If the receptor has a constant cross-section, such as a circular cross-section, it has a preferred width or diameter of 1 mm to 5 mm.

[0094] It should be noted that the conductive heating element 11a can be disposed on the inner surface, outer surface, or in the interlayer between the outer and inner surfaces of the ceramic substrate 11b. The placement of the conductive heating element 11a can be flexibly adjusted according to the actual application, and this application is not limited thereto.

[0095] The heating cavity 14 formed by the ceramic substrate 11b is cylindrical, which is well adapted to the cylindrical aerosol generation matrix product.

[0096] Preferably, the inner diameter of the heating cavity 14 is less than 9 mm, the outer diameter of the heating cavity 14 is less than 16 mm, the wall thickness of the heating cavity 14 is 0.1-5 mm, and the height of the heating cavity 14 is 5-30 mm.

[0097] The conductive heating element 11a is a metal heating paste, which is one or more of the following: tungsten, manganese, molybdenum, gold, silver, copper, rhenium, palladium, niobium, tantalum, aluminum, chromium, iron, silicon, titanium, zinc, carbon, nickel, cobalt, and boron.

[0098] The resistance of the metal heating paste is less than 1.5Ω or less than 0.4Ω.

[0099] Preferably, the resistance of the metal heating paste can be less than 0.1Ω. It is understood that the lower the resistance of the metal heating paste, the less heat is lost by the coil itself, thus improving the efficient utilization of energy.

[0100] The temperature coefficient of resistance of the metal heating paste is less than 2000 ppm / ℃.

[0101] Preferably, the temperature coefficient of resistance (TCR) of the metal heating paste is less than 1000 ppm / ℃.

[0102] It is understandable that the smaller the temperature coefficient of resistance, the smaller the change in resistance of the metal heating paste with temperature, which is more conducive to the stability of the heating system and reduces resistance loss.

[0103] It should be noted that the aerosol generating device 10 of this application heats the aerosol forming matrix 20 by magnetic induction. The metal heating paste is set on the ceramic substrate 11b by screen printing in a spiral manner to form an inductor coil. The two ends of the printed circuit are connected to the control component 13 of the aerosol generating device 10 by soldering leads.

[0104] For example, the ceramic substrate 11b is an oxide ceramic substrate 11b, a silicon nitride ceramic substrate, or a carbide ceramic substrate.

[0105] The number of turns of the conductive heating element in the spiral printing can be in the range of 3-8, 8-15, and 15-18.

[0106] The coating thickness of the conductive heating element is 0.01-0.5mm, and the width is 0.1-5mm.

[0107] It is understood that the coil assembly 11 of this application is particularly suitable for the electromagnetic heating aerosol generating device 10. Due to the skin effect of high-frequency current in the electromagnetic heating system, the current will concentrate on the surface of the coil conductor, while almost no current passes through the center part of the conductor. This is equivalent to the cross-section of the wire being reduced and the resistance being increased, thereby generating a certain resistance loss and causing a reduction in energy conversion efficiency.

[0108] Therefore, the present invention uses metal heating paste to print the coil, which results in a coil thickness that is smaller than that of a multi-strand coil, a larger equivalent cross-sectional area, and a lower resistance, thus generating less resistance loss.

[0109] The control component 13 is electrically connected to the coil. The control component 13 issues a control command, causing the power supply 12 to generate a high-frequency alternating current that passes through the coil. This generates heat in the ferromagnetic sensor through hysteresis loss and eddy current effect, which is used to generate aspirable aerosols for the aerosol generation product.

[0110] Meanwhile, a magnetic shielding component is installed between the coil and the outer shell of the aerosol product.

[0111] For example, the magnetic shielding component can be a sheet, coating, etc., used to reduce magnetic leakage, ensure magnetic field strength, and improve energy utilization.

[0112] In this specification, references to "an embodiment" or "a specific implementation" mean that a particular feature, structure, or characteristic described in connection with that embodiment / specific implementation is included in at least one embodiment / specific implementation of the invention. Therefore, the phrase "in one embodiment / specific implementation" appearing in various places in this specification does not necessarily refer to the same embodiment / setting, but rather to potentially different embodiments. Furthermore, specific features, structures, or characteristics may be combined in one or more embodiments / settings in any suitable manner, as will be apparent to those skilled in the art from this disclosure.

[0113] Similarly, it should be understood that in the above description of exemplary embodiments / specific implementations of the present invention, various features of the present invention are sometimes combined together in a single embodiment / specific implementation or its figures and descriptions, with the aim of simplifying the disclosure and aiding in the understanding of one or more of the various aspects of the invention.

[0114] However, except for explicit instructions to the contrary or obvious technical contradictions or exclusions, the descriptive method of this patent should not be interpreted as reflecting an intention that the claimed features of the invention are more than those explicitly stated in each claim.

[0115] Conversely, the inventive aspect reflected in the claims lies in not all the features of a single foregoing disclosed embodiment / specification. Therefore, the claims following the detailed description are expressly incorporated herein, each claim existing independently as a separate embodiment / specification of the invention.

[0116] Furthermore, while some embodiments / specific implementations described herein include, but are not limited to, other features included in other embodiments / specific implementations, combinations of features from different embodiments / specific implementations are intended to be within the scope of the invention and form different embodiments / specific implementations, as will be understood by those skilled in the art. For example, in the following claims, embodiments / specific implementations of any claim can be used in any combination.

[0117] The terms and expressions used in this specification are for illustrative purposes and not for limitation. In using these terms and expressions, it is not intended to exclude any equivalents of the features or portions thereof shown and described, but rather to recognize that various modifications may be possible within the scope of the invention.

[0118] Therefore, it should be understood that although the invention has been specifically disclosed through preferred embodiments, exemplary embodiments and optional features, those skilled in the art may take variations or modifications of the concepts disclosed herein, and such variations and modifications are therefore considered to be within the scope of the invention as defined by the appended claims.

[0119] The specific embodiments given in this specification are examples of useful implementations of the present invention. It will be apparent to those skilled in the art that the present invention can be implemented using many variations of the devices, device components, and method steps disclosed in this specification.

[0120] The foregoing description of specific embodiments fully discloses the general features of the present invention, enabling others to easily modify and / or adapt such specific embodiments for various applications by applying knowledge within the scope of the art, without conducting excessive experimentation and without departing from the general concept of the present invention.

[0121] Therefore, based on the teachings and guidance provided herein, it is intended that such modifications and alterations be included within the meaning and scope of equivalents of the disclosed embodiments. It should be understood that the wording or terminology used herein is for descriptive purposes and is not intended to be limiting; thus, the wording or terminology in this specification will be interpreted by those skilled in the art based on the foregoing teachings and guidance.

[0122] Furthermore, the scope of the invention should not be limited to any of the exemplary embodiments described above, but only to the appended claims and their equivalents.

Claims

1. A coil assembly for an aerosol generating device, the aerosol generating device including a control component, the control component transmitting an electrical signal to the coil assembly via an electrical connection portion, characterized in that, The coil assembly includes a ceramic substrate and a conductive heating element. The ceramic matrix encloses a heating cavity, which is used to contain aerosols to form a matrix. The conductive heating element is disposed on the ceramic substrate, and the conductive heating element heats the aerosol to form a matrix, thereby generating the aerosol.

2. The coil assembly of the aerosol generating device according to claim 1, characterized in that, The conductive heating element is disposed at at least one location on the inner surface, outer surface, and intermediate region of the ceramic substrate.

3. The coil assembly of the aerosol generating device according to claim 1, characterized in that, The heating cavity is cylindrical, with an inner diameter of less than 9 mm, an outer diameter of less than 16 mm, a wall thickness of 0.1-5 mm, and a height of 5-30 mm.

4. The coil assembly of the aerosol generating device according to claim 1, characterized in that, The conductive heating element is a metal heating slurry.

5. The coil assembly of the aerosol generating device according to claim 4, characterized in that, The metal heating paste is one or more of the following: tungsten, manganese, molybdenum, gold, silver, copper, rhenium, palladium, niobium, tantalum, aluminum, chromium, iron, silicon, titanium, zinc, carbon, nickel, cobalt, and boron.

6. The coil assembly of the aerosol generating device according to claim 4, characterized in that, The resistance of the metal heating paste is less than 1.5Ω, and the temperature coefficient of resistance of the metal heating paste is less than 2000ppm / ℃.

7. The coil assembly of the aerosol generating device according to claim 1, characterized in that, The ceramic matrix is ​​an oxide ceramic matrix, a silicon nitride ceramic matrix, or a carbide ceramic matrix.

8. The coil assembly of the aerosol generating device according to claim 1, characterized in that, The conductive heating element has 3-18 turns in the spiral printing process.

9. The coil assembly of the aerosol generating device according to claim 1, characterized in that, The coating thickness of the conductive heating element is 0.01-0.5 mm, and the width is 0.1-5 mm.

10. An aerosol generating device, characterized in that, Includes the coil assembly as described in any one of claims 1-9.

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