Magnetic smoke generating body containing multiple magnetic foils and electromagnetic smoke cartridge

Abstract

The utility model discloses a magnetic fuming body containing multiple magnetic foils and an electromagnetic smoke cartridge. The magnetic fuming body comprises an aerosol substrate, the multiple magnetic foils arranged in the aerosol substrate and wrapping paper wrapping the periphery of the aerosol substrate. A plurality of magnetic foils are discretely distributed substantially longitudinally in the aerosol substrate, the magnetic foils comprising a magnetic metal foil. On one hand, excessive concentration of heat can be avoided, and the heat is more uniformly transferred to each part of the aerosol substrate, so that uniform carbonization is realized. On one hand, the problem of transverse cutting of the thicker metal belt in the traditional process can be solved, so that the process is simplified, and the production cost is reduced. And on the other hand, the magnetic foil can be bundled together with the tobacco shreds, is coated with the outer-layer thin paper, and then is transversely cut to form the smoke generating body instead of being independently inserted into the smoke generating body traditionally, so that the preparation process is simple.

Description

Technical Field

[0001] This invention belongs to the field of aerosol generation technology, and particularly relates to a magnetic smoke generator containing multiple magnetic foils and an electromagnetic smoke cartridge. Background Technology

[0002] Electromagnetic induction heating technology is increasingly being applied to the field of new tobacco products. One of its core components is the electromagnetic cartridge, which converts electrical energy into heat energy through the principle of electromagnetic induction, thereby heating the aerosol matrix and generating an inhalable aerosol. Existing electromagnetic cartridges are mainly classified into two types according to the morphology of the aerosol matrix: sheet type and granular type. Regardless of whether it is a sheet type or a granular type, electromagnetic cartridges usually adopt the traditional central heating mode, that is, placing a single ferromagnetic or ferrimagnetic sensor in the central area of ​​the aerosol matrix to achieve localized concentrated heating.

[0003] Electromagnetic cartridges configured with thin-film sensors have gradually become the industry mainstream due to their superior aerosol generation efficiency and significant cost advantages. However, a significant challenge in current designs lies in the limitations of their sensor construction—the relatively large cross-sectional size of the single magnetic sensor within the aerosol matrix (typically 0.06-0.1mm thick and 3-4mm wide). This increases the difficulty of coordinating its cross-section with the aerosol matrix, leading to a sharp increase in tool wear under frequent operation. Furthermore, the single magnetic sensor at the center of the thin-film electromagnetic cartridge is prone to loosening and displacement within the cartridge, affecting the uniformity of the heating process and potentially resulting in unsatisfactory heating effects, thus weakening the overall product performance and user satisfaction. More critically, placing a single ferromagnetic or ferrimagnetic sensor in the central region of the aerosol matrix leads to uneven carbonization distribution and the potential for over-carbonization in localized areas. These issues not only impair the product's performance stability but also directly reduce user enjoyment and satisfaction during use.

[0004] To address the above problems, the present invention provides a solution. Utility Model Content

[0005] To address the aforementioned technical bottlenecks, this invention proposes a novel sensor configuration approach, which effectively overcomes the shortcomings of existing technologies and is expected to further improve the performance and user experience of electromagnetic cigarette cartridges.

[0006] This invention discloses a magnetic smoke generator and an electromagnetic cigarette cartridge containing multiple magnetic foils. The design involves creating multiple micro-magnetic foils from magnetic metal foil or a composite of magnetic metal foil and backing paper, and then discretely embedding them into the aerosol matrix. This effectively reduces the difficulty of cross-cutting the smoke generator and improves production efficiency. Simultaneously, the discretely distributed magnetic foils achieve a more uniform heating effect, avoiding localized over-carbonization, thereby improving aerosol quality and flavor consistency.

[0007] The first aspect of this utility model provides a magnetic smoke generator containing discretely distributed magnetic foil sheets, which includes an aerosol matrix, a plurality of magnetic foil sheets dispersed in the aerosol matrix, and a covering paper wrapped around the aerosol matrix. The magnetic foil sheets are discretely distributed in the aerosol matrix, and the magnetic foil sheets contain magnetic metal foil.

[0008] In terms of heating effect, compared to the thicker metal strips used in traditional processes, the magnetic foil sheet of this invention contains a thinner magnetic metal foil, which can respond to temperature changes more quickly, thereby achieving more precise temperature control. In terms of form, this invention distributes multiple sensors in a discrete manner within the aerosol matrix, increasing the contact area, rather than using a single, concentrated arrangement as in traditional methods. This avoids excessive heat concentration and allows heat to be transferred more evenly to all parts of the aerosol matrix, thus achieving uniform carbonization.

[0009] From an assembly and processing perspective, when the magnetic foil is a magnetic metal foil, the single-layer magnetic metal foil is very thin, making it easy to cross-cut with the aerosol matrix. While the composite structure thickness increases to some extent when the magnetic foil is a composite of magnetic metal foil and backing paper, it is still easier to cut compared to traditional metal strip processes because it is backed by paper. More importantly, the magnetic foil of this invention is discretely distributed within the aerosol matrix. Compared to traditional centrally located monolithic magnetic sensors, even with the same total cross-sectional area, the discretely distributed magnetic foil is still easier to cross-cut with the aerosol matrix. Therefore, regardless of whether the magnetic foil is selected from thinner magnetic metal foil or from metal paper composite with backing paper, it is easy to cut, solving the cross-cutting problem of thicker single-layer metal strips in traditional processes, thereby simplifying the process and reducing production costs.

[0010] Preferably, the aerosol matrix is ​​a sheet-like aerosol matrix, and the magnetic smoke generator includes multiple sheets of the aerosol matrix. The aerosol matrix and the magnetic foil are arranged approximately parallel to each other axially, and the magnetic foil is arranged approximately parallel to the axial centerline. The axial lengths of the aerosol matrix and the magnetic foil are approximately the same, such as close to or identical.

[0011] Preferably, the magnetic foil has a thickness of 0.003-0.13 mm and a width of 1-3 mm.

[0012] Considering factors such as tensile strength, heating area, and ease of processing, the width of the longitudinally slit magnetic foil is controlled within the range of 1-3 mm. After transverse slicing, the micro magnetic foil exhibits a morphology similar to the sheet-like aerosol matrix, and their dimensions allow for orderly arrangement and the construction of a stable and uniform airway structure.

[0013] Preferably, the magnetic foil is a single magnetic metal foil or a metal paper composed of a magnetic metal foil and a backing paper; the thickness of the magnetic metal foil is 0.003-0.03 mm; the thickness of the metal paper composed of the magnetic metal foil and the backing paper is 0.02-0.13 mm, wherein the thickness of the backing paper is 0.017-0.1 mm.

[0014] Here, magnetic foil is used as a broad definition, encompassing two types:

[0015] ① Single-layer magnetic metal foil: Composed of an ultra-thin pure metal film, it possesses strong magnetism and has a thickness of 0.003-0.03mm. This type of magnetic foil can be directly processed into subsequent slitting and bundling. Because the single-layer magnetic metal foil is extremely thin, similar to tearable steel, it is easy to cross-cut in conjunction with an aerosol matrix.

[0016] For metal foil, its thickness has a significant impact on material cost and processing difficulty. Within a conventional thickness range, as the thickness decreases, the weight and material cost of the metal foil decrease accordingly. However, current metallurgical processing technology has technical bottlenecks; when the thickness is below 0.003 mm, the processing difficulty and related costs increase significantly, and the foil is prone to breakage. On the other hand, metal foils thicker than 0.03 mm are not conducive to longitudinal and transverse cutting and forming. Therefore, this design defines the thickness of the metal foil as the range of 0.003-0.03 mm.

[0017] ② Multilayer composite magnetic metal paper: This is made by bonding the aforementioned magnetic metal foil with a thinner backing paper using an adhesive, with a thickness of 0.02-0.13 mm. The introduction of the composite structure aims to enhance the strength and toughness of the metal foil, preventing breakage during slitting and bundling, thereby improving processing yield and the reliability of the final product. Although the thickness of the composite structure increases to some extent, because it is composited with backing paper, it is still easier to cut compared to traditional metal strip processes.

[0018] For metal paper, in order to optimize mechanical strength and reduce heat loss, thin backing paper with a thickness range of 0.017-0.1 mm is used to composite with metal foil, and the thickness of the final metal paper is controlled between 0.02-0.13 mm.

[0019] Preferably, the liner paper is conventional paper or modified tobacco paper with added tobacco components.

[0020] Conventional paper, as a mechanical carrier, exhibits good safety within the application temperature range of tobacco cartridges. Modified paper with added tobacco components, through the direct addition of tobacco plants or the incorporation of a certain amount of nicotine or nicotine salts, achieves a slow release of papery flavor substances during heating, thereby enhancing the user experience.

[0021] Preferably, the magnetic smoke generator is columnar, with a length of 8-30 mm and a diameter of 5-15 mm.

[0022] In this invention, considering compatibility with the cartridge compartments in common smoking devices, the cartridge must have a suitable size and contain a certain amount of electromagnetic smoke generator to ensure sufficient and necessary aerosol generation. If the receptors are distributed discretely, the cartridge diameter can be further increased while still achieving a good carbonization effect. In this invention, the diameter of a single electromagnetic smoke generator after transverse cutting is defined as 5-15mm, and the length as 8-30mm.

[0023] Preferably, the magnetic smoke generator includes 3-16 miniature magnetic foil sheets.

[0024] Considering the principles of electromagnetic induction, a greater number of sensors is not necessarily better. Too many magnetic foils may cause magnetic field interference, reducing coupling efficiency. Conversely, too few magnetic foils will not provide sufficient eddy current heat generation. Furthermore, using too many magnetic foils can lead to excessively vigorous aerosol release during use, resulting in very dense vapor in the first few puffs, followed by a significant decrease in vapor in subsequent puffs. Therefore, this design sets the number of magnetic foils in the smoke generator within the range of 3-16 pieces to ensure optimal electromagnetic coupling strength and stable aerosol release within a limited space.

[0025] Preferably, the magnetic metal foil is a single-layer structure of a single alloy or a multi-layer structure of composite metals.

[0026] Preferably, the metallic material in the magnetic metal foil includes iron, cobalt, nickel, or a variety of magnetic alloys with iron, cobalt, and nickel as base elements. Examples include iron-chromium-aluminum alloys and permalloy.

[0027] Preferably, the metal material in the magnetic metal foil can also be magnetic stainless steel.

[0028] When constructing magnetic metal foil sensors, a single alloy material can be used to create a single-layer structure through rolling, forming a basic sensor configuration. For example, 1J95 permalloy thin strip can be used as a single sensor. This alloy can generate strong coupling with high-frequency magnetic fields, and the regular behavior of its relative permeability changing with temperature can be used to achieve functions such as temperature control and measurement.

[0029] To further optimize the functionality of the aerosol generation system (cartridge + sensor + cartridge), providing functions such as cartridge identification, temperature measurement and control, and puff counting, another configuration for the sensor is a multi-layered composite structure composed of various metals. This creates a complex sensor where each layer plays a unique role, working together to achieve multiple functions. For example, a composite sensor can be made by combining pure nickel strips and pure iron strips, rolling them into an ultra-thin strip, and then plating both sides with chromium to form a protective layer. The combination of pure nickel and pure iron imparts a certain overall relative permeability to the composite sensor. The independent relative permeability of the two materials exhibits different trends with temperature changes. Furthermore, pure nickel loses its magnetism at 354°C, while pure iron retains its magnetism. This overall change in permeability can serve as an important reference for achieving the aforementioned functions. In addition, the chromium coating can prevent the oxidation and corrosion of pure iron.

[0030] Preferably, the relative permeability of the magnetic metal foil under test conditions of room temperature and 1-10MHz frequency is between 5 and 80,000.

[0031] In the normal use of electromagnetic cigarette cartridges, the sensor is typically heated from room temperature to a maximum of approximately 350°C under the excitation of a high-frequency coil. Therefore, it is required to maintain strong magnetism throughout the temperature range of room temperature to 350°C to ensure continuous electromagnetic coupling. Moreover, the higher the permeability, the faster the heating and the higher the energy conversion efficiency. Therefore, this invention sets the magnetic characteristics of the metal foil to be: under room temperature and 1-10MHz frequency testing conditions, its relative permeability is in the range of 5-80,000.

[0032] Preferably, the substrate of the aerosol matrix is ​​tobacco plant fiber, non-tobacco plant fiber, or high-temperature resistant synthetic fiber; the aerosol matrix also includes a fogging agent, nicotine or nicotine salt, and fragrance.

[0033] This utility model aims to overcome the limitations of existing aerosol matrix materials and further expand their substrate to a wider range of fields, including the following three categories:

[0034] (1) Tobacco plant fiber: including conventional tobacco and other plant fibers containing nicotine or related alkaloids, providing a flavor that is more similar to or close to that produced when conventional cigarettes are burned.

[0035] (2) Non-tobacco plant fibers: including various non-nicotine plant fibers such as cotton, flax, bamboo, etc., which can provide different carbonization characteristics and taste experience.

[0036] (3) High-temperature resistant synthetic fibers: such as polylactic acid fiber, aramid fiber, polyimide fiber, etc., can provide more stable temperature resistance and cleaner, purer smoke.

[0037] In addition, to further improve the performance of aerosols and user experience, this invention also considers adding the following substances to the matrix material:

[0038] Fogging agents: Used to produce denser, more stable aerosols and enhance visual effects.

[0039] Nicotine or nicotine salts: designed to meet the needs of nicotine users and offer different nicotine release rates and strengths.

[0040] Flavors and fragrances: used to improve the taste and odor of aerosols and to provide a diverse sensory experience.

[0041] By expanding the matrix material to a wider range of fields and supplementing it with functional additives, this invention can provide more diversified and personalized aerosol products to meet the needs of different users.

[0042] The second aspect of this utility model provides a method for preparing a magnetic smoke generator containing discretely distributed magnetic foil as described in the first aspect of this utility model, which includes cutting into strips, bundling, coating, and cross-cutting.

[0043] During production, the aforementioned metal foil or paper is cut from tobacco shreds, then bundled together and wrapped with an outer thin paper layer. It is then transversely cut to form a smoke-generating body. The micro-magnetic foil sheets are discretely distributed, meaning the smoke-generating body contains multiple independent receptors (heat-generating elements). This method avoids excessive magnetic field concentration and reduces the risk of localized overheating. One or both ends of the magnetic smoke-generating body have flush cuts, facilitating assembly during the integration of electromagnetic cigarette cartridges.

[0044] The main manufacturing processes of the smoke-generating body include:

[0045] Step 1: Segmentation and Bundling.

[0046] The metal foil or paper is precisely cut to match the tobacco shreds, ensuring consistency in size and shape. Then, the cut metal foil / paper is bundled together with the tobacco shreds to form a single, integrated tobacco coil. During this process, the uniformity of the metal foil or paper distribution must be ensured.

[0047] Step 2: Wrap with tissue paper.

[0048] A thin layer of paper is used to wrap the bundled smoke-generating strips, which serves to isolate and protect them, preventing the metal foil / paper from direct contact with the outside world, while maintaining the integrity of the smoke-generating strips and shaping them.

[0049] Step 3: Cut horizontally.

[0050] The coated smoke-generating strip is then cut laterally to form the final smoke-generating body. During the cutting process, the integrity of the magnetic foil must be ensured.

[0051] The third aspect of this utility model provides an electromagnetic cigarette cartridge comprising the magnetic smoke-generating body with discretely distributed magnetic foil as described in the first aspect of this utility model. The electromagnetic cigarette cartridge includes a cigarette tube, and a sealing element, a magnetic smoke-generating body, and a filter tip arranged from upstream to downstream within the cigarette tube. This cigarette cartridge is merely an example of a commonly used form and is not limited to this structure.

[0052] Preferably, the smoke tube does not contain any annular metal in the section corresponding to the magnetic smoke generator.

[0053] Compared with the prior art, the present invention has the following beneficial effects:

[0054] 1. From the perspective of heating effect, in terms of material, compared to the thicker metal strips used in traditional processes, the magnetic foil of this invention contains a thinner magnetic metal foil, which can respond to temperature changes more quickly, thereby achieving more precise temperature control. In terms of form, this invention distributes multiple sensors in a discrete manner within the aerosol matrix, increasing the contact area, rather than the traditional single-piece centralized configuration. This avoids excessive heat concentration and allows heat to be transferred more evenly to all parts of the aerosol matrix, thus achieving uniform carbonization. Furthermore, the use of multiple magnetic foils in a parallel configuration allows for a longer cut magnetic circuit, meaning the loop length of the magnetic flux through the magnetic foil is very long.

[0055] 2. From an assembly and processing perspective, when the magnetic foil is a magnetic metal foil, the single-layer magnetic metal foil is very thin, making it easy to cross-cut with the aerosol matrix. While the composite structure thickness increases to some extent when the magnetic foil is a composite of magnetic metal foil and backing paper, it is still easier to cut compared to traditional metal strip processes because it is composited with backing paper. More importantly, the magnetic foil of this invention is discretely distributed within the aerosol matrix. Compared to traditional centrally located monolithic magnetic sensors, even when the total cross-sectional area is equal, the discretely distributed magnetic foil still facilitates cross-cutting with the aerosol matrix. Therefore, regardless of whether the magnetic foil is selected from thinner magnetic metal foil or from metal paper composited with backing paper, it is easy to cut, solving the cross-cutting problem of thicker metal strips in traditional processes, thereby simplifying the process and reducing production costs.

[0056] 3. In terms of the preparation process, the metal foil or metal paper of this utility model can be bundled together with tobacco shreds and covered with an outer thin paper, and then cut laterally to form a smoke-generating body. It does not need to be set separately into the smoke-generating body, and the preparation process is simple. Attached Figure Description

[0057] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other embodiment drawings obtained without creative effort should be included in the technical solutions of this utility model.

[0058] Figure 1 : A schematic diagram of the magnetic foil sheets distributed in the aerosol matrix in this utility model;

[0059] Figure 2 : A schematic diagram of the magnetic flux distribution of the model system in Embodiment 3 of this utility model;

[0060] Figure 3 : Schematic diagram of magnetic flux distribution in the miniature magnetic foil sensor in Embodiment 3 of this utility model.

[0061] The names of the reference numerals in the figure description are: 1-smoke generator, 101-magnetic foil, 102-aerosol matrix, 103-coating paper. Detailed Implementation

[0062] The present invention will be further described in detail below with reference to the embodiments.

[0063] Those skilled in the art will understand that the following embodiments are for illustrative purposes only and should not be construed as limiting the scope of the present invention. Where specific techniques or conditions are not specified in the embodiments, they are performed in accordance with the techniques or conditions described in the literature in the field or according to the product instructions. Materials or equipment whose manufacturers are not specified are all conventional products that can be obtained by purchase.

[0064] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the word “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we say an element is “connected” to another element, it can be directly connected to the other element, or there may be an intermediate element. Furthermore, the term “connected” as used herein can include wireless connections.

[0065] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. The terms "inner", "upper", "lower", etc., indicate the orientation or state relationship based on the orientation or state relationship shown in the drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.

[0066] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "equipped with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art will understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0067] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless defined as herein.

[0068] To ensure sufficient eddy current heat generation and achieve efficient heating, electromagnetic coupling strength becomes a key parameter. This invention achieves precise control of electromagnetic coupling strength by optimizing the size, quantity, and discrete distribution of the magnetic foil. It should be noted that "discrete" or "discrete distribution" in this application is a general description, including uniform or non-uniform arrangement, and including arrangement according to a certain pattern or arbitrary arrangement.

[0069] Example 1

[0070] Figure 1 This diagram illustrates the structural configuration of a smoke generator according to the present invention. Twelve micro-magnetic foils 101 are discretely distributed within an aerosol matrix 102, and a thin layer of covering paper 103 is located around the aerosol matrix 102. Through close contact, a columnar magnetic smoke generator 1 is formed. The magnetic foils 101 and the smoke generator 1 are arranged parallel to each other, and after cross-sectioning, their ends remain flush.

[0071] This design offers several advantages. Firstly, the use of multiple magnetic foils arranged in parallel allows for a longer cutting magnetic circuit, meaning the loop length of the magnetic flux through the foils is quite long. Secondly, using an appropriate number of magnetic foils with a roughly uniform distribution provides a larger heating area, while minimizing contact between the foils to prevent localized overheating. More importantly, this structure exhibits lower shear force, facilitating processing and shaping.

[0072] Specifically, in this embodiment, the magnetic smoke generator containing discretely distributed magnetic foils includes multiple thin sheet-like aerosol matrix, multiple magnetic foils, and a covering paper wrapped around the aerosol matrix. The magnetic foils are discretely distributed in the aerosol matrix, and the aerosol matrix and the magnetic foils are arranged axially parallel and bundled together. The magnetic foils contain magnetic metal foils.

[0073] The aerosol matrix and the magnetic foil have the same axial length.

[0074] The magnetic foil has a thickness of 0.02 mm and a width of 1.5 mm.

[0075] The magnetic foil is a separate magnetic metal foil.

[0076] The magnetic smoke generator is columnar, with a length of 12mm and a diameter of 7mm.

[0077] The magnetic smoke generator contains 12 micro magnetic foil sheets.

[0078] The magnetic metal foil can be a single-alloy single-layer structure or a composite metal multilayer structure. For example, a single alloy nickel, or a composite structure of iron sheet plated with nickel.

[0079] The magnetic metal foil contains metallic materials including iron, cobalt, nickel, and various magnetic alloys with these as base elements. Examples include iron-chromium-aluminum alloys and permalloy. In other applications, magnetic stainless steel, such as SUS440, can also be used as the substrate.

[0080] When constructing magnetic metal foil sensors, a single alloy material can be used to create a single-layer structure through rolling, forming a basic sensor configuration. For example, 1J95 permalloy thin strip can be used as a single sensor. This alloy can generate strong coupling with high-frequency magnetic fields, and the regular behavior of its relative permeability changing with temperature can be used to achieve functions such as temperature control and measurement.

[0081] To further optimize the functionality of the aerosol generation system (cartridge + sensor + cartridge) and provide functions such as cartridge identification, temperature measurement and control, and puff counting, another configuration for the sensor in this embodiment is a multi-layered composite structure composed of various metals, forming a complex sensor in which each layer plays a unique role and works together to achieve multiple functions. For example, a composite of pure nickel strip and pure iron strip is rolled into an ultra-thin strip, and then double-sided chromium plating is applied to form a protective layer, serving as a composite sensor. The combination of pure nickel and pure iron gives the composite sensor a certain overall relative permeability. The independent relative permeability of the two materials exhibits different trends with temperature changes, and pure nickel loses its magnetism at 354°C, while pure iron retains its magnetism. This overall change in permeability can serve as an important reference for achieving the above functions. In addition, the chromium coating can prevent the oxidation and corrosion of pure iron.

[0082] The relative permeability of the magnetic metal foil is between 5 and 80,000 under test conditions of room temperature and 1-10MHz frequency.

[0083] The liner paper is either conventional paper or modified tobacco paper with added tobacco components. Similarly, the covering paper can also be made of a similar material. In this embodiment, in order to slow down the release of the pasty smell during heating and improve the user experience, the liner paper is modified tobacco paper with tobacco plants directly added or with a certain amount of nicotine or nicotine salts added.

[0084] The substrate of the aerosol matrix is ​​tobacco plant fiber, non-tobacco plant fiber or high-temperature resistant synthetic fiber; the aerosol matrix also includes a fogging agent, nicotine or nicotine salt, and fragrance.

[0085] The aerosol matrix materials in this embodiment fall into the following three main categories:

[0086] (1) Tobacco plant fiber: including conventional tobacco and other plant fibers containing nicotine or related alkaloids, providing a flavor that is more similar to or close to that produced when conventional cigarettes are burned.

[0087] (2) Non-tobacco plant fibers: including various non-nicotine plant fibers such as cotton, flax, bamboo, etc., which can provide different carbonization characteristics and taste experience.

[0088] (3) High-temperature resistant synthetic fibers: such as polylactic acid fiber, aramid fiber, polyimide fiber, etc., can provide more stable temperature resistance and cleaner, purer smoke.

[0089] In addition, to further improve the performance of the aerosol and the user experience, the following substances are added to the matrix material in this embodiment:

[0090] Fogging agents: Used to produce denser, more stable aerosols and enhance visual effects.

[0091] Nicotine or nicotine salts: designed to meet the needs of nicotine users and offer different nicotine release rates and strengths.

[0092] Flavors and fragrances: used to improve the taste and odor of aerosols and to provide a diverse sensory experience.

[0093] By expanding the matrix material to a wider range of fields and supplementing it with functional additives, this invention can provide more diversified and personalized aerosol products to meet the needs of different users.

[0094] The method for preparing the magnetic smoke generator containing discretely distributed magnetic foil includes cutting into strips, bundling, coating, and cross-cutting.

[0095] During the production process, the aforementioned metal foil or paper is cut together with tobacco shreds, then bundled together and wrapped with an outer thin paper. Next, it is transversely cut to form a smoke-generating body. The micro-magnetic foil sheets are discretely distributed, meaning there are multiple independent receptors (heat-generating elements) within the smoke-generating body. This method avoids excessive concentration of the magnetic field, reducing the risk of localized overheating.

[0096] The main manufacturing processes of the smoke-generating body include:

[0097] Step 1: Segmentation and Bundling.

[0098] The metal foil or paper is precisely cut to match the tobacco shreds, ensuring consistency in size and shape. Then, the cut metal foil / paper is bundled together with the tobacco shreds to form a single, integrated tobacco coil. During this process, the uniformity of the metal foil or paper distribution must be ensured.

[0099] Step 2: Wrap with tissue paper.

[0100] A thin layer of paper is used to wrap the bundled smoke-generating strips, which serves to isolate and protect them, preventing the metal foil / paper from direct contact with the outside world, while maintaining the integrity of the smoke-generating strips and shaping them.

[0101] Step 3: Cut horizontally.

[0102] The coated smoke-generating strip is then cut laterally to form the final smoke-generating body. During the cutting process, the integrity of the magnetic foil must be ensured.

[0103] The sample in this embodiment is named Experimental Sample A.

[0104] Example 2

[0105] In Example 2, the transverse strength of the magnetic smoke generator was evaluated and compared with the traditional model that incorporates a monolithic sensor in the central region.

[0106] Experimental Sample A: The magnetic smoke generator experimental sample contains 12 micro magnetic foil sheets made of pure metal foil, with a thickness of 0.02 mm and a width of 1.5 mm, and a total cross-sectional area of ​​0.27 mm². 2 .

[0107] Reference Sample B: A smoke generator with a single sensor embedded in the central region. The sensor's thickness and width are 0.065 mm and 4 mm, respectively, and its cross-sectional area is 0.26 mm². 2 .

[0108] The diameter of the smoke-generating body of experimental sample A and reference sample B is 6.8 mm, and their cross-sectional area is 36.29 mm². 2 .

[0109] Using a SANS universal testing machine, a cutting tool was assembled and pushed downwards at a speed of 50 mm / s until the smoke-generating body was severed. Test results showed that the average maximum shear strength of experimental sample A and reference sample B were 196.1 N and 365.4 N, respectively. The shear strength of the smoke-generating body was defined as the maximum shear force divided by the cross-sectional area of ​​the smoke cartridge, which was 38.46 mm². 2 Calculations showed that the shear strength of experimental sample A was 5.1 MPa, which is much smaller than the shear strength of reference sample B, which was 9.5 MPa.

[0110] The results show that even when the total cross-sectional areas of experimental sample A and reference sample B are similar (or even when the sum of the cross-sectional areas of experimental sample A is slightly larger than that of reference sample B), the discrete configuration of the receptors makes the resistance encountered by the cutting blade during its movement more uniform and dispersed, resulting in a smaller overall cutting force and making it easier to cut the smoke body.

[0111] Example 3

[0112] In Example 3, COMSOL Multiphysics software was used to simulate the magnetic flux distribution in the sensor of experimental sample A under discrete distribution conditions at a working frequency of 5MHz.

[0113] In this embodiment, the model is configured such that the electromagnetic atomizing cartridge is inserted into the cartridge compartment of the electromagnetic induction heating module; the induction coil is a solenoid type with an inner diameter of 8.6 mm, an effective height of 20 mm, an input current of 2 A, and a resonant signal frequency of 5 MHz; the outer diameter of the cartridge is 7 mm and the height is 42 mm; the outer diameter of the smoke-generating body is 7 mm and the length is 12 mm, and the aerosol matrix therein is made of thin sheet-like tobacco; the smoke-generating body contains 12 discrete double-row distributed micro magnetic foil sensors, the magnetic foil is a single magnetic metal 1J85, with a thickness, width, and length of 0.02 mm, 1.5 mm, and 12 mm, respectively, and a relative permeability of 50,000.

[0114] Figure 2 A schematic diagram of the magnetic flux distribution in this model system is shown, with the main structure of the cartridge not shown. It can be seen that the magnetic flux is concentrated on the inner side of the coil, indicating a strong magnetic induction region. Arranging various strip-shaped sensors parallel to the magnetic field lines in this region allows for strong electromagnetic coupling. The magnetic flux density in the micro-magnetic foil sensor reaches as high as 0.7 Tesla, and the magnetic flux distribution within the micro-magnetic foil is relatively uniform, thus predicting a relatively uniform and dispersed eddy current heating effect.

[0115] Figure 3 A schematic diagram of the magnetic flux distribution in 12 miniature magnetic foil sensors is shown independently. Furthermore, it can be seen that the magnetic flux density in a single sensor is mostly concentrated between 0.1 and 0.7 Tesla, indicating a strong induction effect. Therefore, it can be inferred that this discrete sensor distribution pattern can still exhibit a strong eddy current heating effect.

[0116] Example 4

[0117] The effects of the electromagnetic cartridge of this invention and the cartridge with the sensor embedded in the center on inductance and quality factor are compared at 1MHz, 5MHz and 10MHz.

[0118] Using the coil and miniature magnetic foil sensor configuration described in Example 3 above as experimental sample A, and a cartridge with a single sensor located in the central region as reference sample B, experimental sample A and reference sample B were inserted into the same solenoid coil sequentially. Their inductance and quality factor were measured at 1MHz, 5MHz, and 10MHz. Additionally, the inductance and quality factor of the solenoid coil under no-load conditions were also measured. The results are shown in Table 1.

[0119] Table 1: The effect of a sensor on the inductance and quality factor of the coil system in Example 4

[0120]

[0121] In high-frequency induction heating applications, the inductance and quality factor of the coil system are crucial, affecting heating efficiency and effect. A higher inductance generates a stronger magnetic field, thus improving heating efficiency. Additionally, higher inductance reduces penetration depth, concentrating heating on the surface of the inductor. A higher quality factor results in lower energy loss, meaning the coil can more effectively convert electrical energy into magnetic field energy. Furthermore, a higher quality factor leads to a greater voltage amplification. The quality factor also affects the resonant frequency of the heating circuit; a higher quality factor results in a sharper resonant curve and a narrower frequency band, meaning only currents of specific frequencies can effectively pass through the circuit, thus improving heating efficiency and facilitating the tracking of load changes for corresponding functional operations. In short, a higher quality factor provides a narrower frequency band, higher voltage, and faster response speed, thereby improving heating efficiency and stability. This invention utilizes the presence or absence of the inductor and its temperature-dependent characteristics to influence the inductance and quality factor of the coil system, ultimately mapping these changes to one or more physical quantities in the electronic circuit as input for implementing response operations.

[0122] The embodiments disclosed in this utility model are merely specific examples of this utility model, intended to clearly illustrate this utility model, and should not be regarded as limiting the scope of this utility model. Of course, they should not be used to limit the scope of the claims of this utility model. For those skilled in the art, equivalent changes, modifications, variations, etc., made in accordance with the claims of this utility model without creative labor are still within the scope of this utility model and should be included in the protection scope of the claims of this utility model.

Claims

1. A magnetic smoking body comprising a plurality of magnetic foils, characterized in that, The magnetic smoking body comprises an aerosol substrate, a plurality of magnetic foil pieces arranged in the aerosol substrate, and a wrapping paper wrapped around the periphery of the aerosol substrate; the plurality of magnetic foil pieces are distributed in the aerosol substrate in a longitudinal direction; the magnetic foil pieces comprise magnetic metal foils.

2. The multi-magnetic foil containing smoking body according to claim 1, wherein, The magnetic foil pieces are single magnetic metal foils or metal papers composed of magnetic metal foils and backing papers.

3. The multi-foil magnetic smoking body of claim 1, wherein, The magnetic metal foils are single-alloy single-layer structures or composite metal multi-layer structures; the relative magnetic permeability of the magnetic metal foils under normal temperature or 1-10 MHz frequency test conditions is between 5 and 80000.

4. The multi-foil magnetic smoking body of claim 1, wherein, The magnetic smoking body is columnar and comprises 3-16 magnetic foil pieces.

5. The multi-foil magnetic smoking body of claim 1, wherein, The thickness of the magnetic foil pieces is 0.003-0.13 mm, and the width is 1-3 mm.

6. The multi-foil magnetic smoking body of claim 1, wherein, The magnetic foil pieces are arranged parallel to the axial center line, and the axial length is close to or the same as that of the aerosol substrate.

7. The multi-foil magnetic smoking body of claim 1, wherein, The end of the magnetic smoking body has flush cutouts.

8. An electromagnetic cartridge characterized by The magnetic smoking body, the smoke tube, and the upstream blocking piece and the downstream filter are provided with the plurality of magnetic foil pieces.

9. The electromagnetic cartridge of claim 8, wherein, The wrapping paper or the magnetic foil pieces comprise modified tobacco paper added with tobacco components.

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