Multi-cigarette electromagnetic heating smoking set

Abstract

The invention provides a multi-cigarette electromagnetic heating smoking set which comprises a cigarette heating assembly, a control assembly and a power source, the cigarette heating assembly comprises a first heating unit and a second heating unit, and the first heating unit and the second heating unit are provided with independent cigarette containing cavities and coil heating pieces correspondingly; the coil heating pieces are separately arranged in the cigarette containing cavities; the control assembly comprises a first heating control unit and a second heating control unit, the first heating control unit is electrically connected with the first heating unit and used for independently controlling the first heating unit to heat, and the second heating control unit is electrically connected with the second heating unit and used for independently controlling the second heating unit to heat. Through the design of the independent heating unit, independent heating of different cigarette containing cavities can be achieved in a multi-cigarette smoking scene.

Description

Technical Field

[0001] This application belongs to the field of new tobacco heating technology, specifically relating to a multi-cigarette electromagnetic heating smoking device. Background Technology

[0002] Electromagnetic heating technology, with its significant advantages such as high heating efficiency, precise temperature control, energy saving, and environmental friendliness, has been widely applied and promoted in the field of new tobacco smoking devices. However, in existing technologies, the structural design of electromagnetic heating devices is mostly limited to single-cigarette heating modes. For example, the authorized patent CN112841747B published by Yunnan Tobacco Industry Co., Ltd. adopts a single-cavity circumferential electromagnetic heating structure, which can only achieve independent heating of a single cigarette. This makes it difficult to adapt to the actual needs of multiple cigarettes being used simultaneously in social settings, resulting in significant shortcomings in ease of use and scenario adaptability.

[0003] When attempting to extend electromagnetic heating technology to multi-cigarette cluster heating applications, the core technical bottleneck lies in the mutual interference of magnetic fields between multiple coils. In multi-cigarette heating structures, multiple electromagnetic induction coils need to be arranged in a close array. The alternating magnetic fields generated by each coil during operation are prone to coupling, leading to a series of technical problems: on the one hand, it causes the coil resonant frequency to shift, disrupting the original heating resonance matching relationship; on the other hand, it causes a significant decrease in heating efficiency, and may also result in localized overheating and uneven heating temperatures of each cigarette, seriously affecting the consistency of tobacco heating and the safety of use.

[0004] Existing electromagnetic heating control technology for single coils can only achieve independent driving and temperature control of a single coil, and cannot adapt to complex scenarios where multiple coils work together. In particular, it lacks a dedicated magnetic field isolation design for multi-coil array layouts, as well as a dynamic power distribution mechanism based on the heating status of each coil. These technical shortcomings seriously restrict the research and development process and market application of multi-cigarette electromagnetic heating devices.

[0005] Furthermore, most existing multi-cigarette heating solutions employ traditional resistance heating, which inherently suffers from drawbacks such as slow heating response, high energy consumption, and poor temperature consistency across multiple heating circuits. This makes it difficult to meet the high standards of heating performance and energy consumption control required by modern tobacco devices. Electromagnetic heating technology based on ceramic coils, with its unique structure and material properties, can combine the high efficiency of electromagnetic induction heating with the stability of self-heating from the ceramic body's resistance, making it potentially suitable for multi-cigarette heating scenarios. However, when applied to a multi-coil array layout, achieving independent and precise control of each individual coil, effectively avoiding magnetic field interference between coils, and dynamically and intelligently allocating power based on actual heating needs remain key technical challenges that urgently need to be addressed in this field. Summary of the Invention

[0006] In view of this, the purpose of this application is to provide a multi-cigarette electromagnetic heating smoking device to solve the above problems.

[0007] To solve the above-mentioned technical problems, this application adopts the following technical solution: This application provides a multi-cigarette electromagnetic heating smoking device, which includes: a cigarette heating component, a control component, and a power supply. The cigarette heating component is used to heat the cigarettes housed within it during operation. The control component is used to control the heating of the component. The power supply provides power to the cigarette heating component and the control component. The cigarette heating component includes a first heating unit and a second heating unit. The first and second heating units are each provided with an independent cigarette receiving cavity and a coil heating element. The coil heating elements are each separately disposed within the cigarette receiving cavity. The control component includes a first heating control unit and a second heating control unit. The first heating control unit is electrically connected to the first heating unit and is used to independently control the heating of the first heating unit. The second heating control unit is electrically connected to the second heating unit and is used to independently control the heating of the second heating unit.

[0008] Furthermore, the coil heating element is a self-heating ceramic coil assembly, which includes a ceramic substrate, a conductive heating element, and a coil. The conductive heating element is disposed on the ceramic substrate, and the coil is wound around the surface of the ceramic substrate. The distance between the coil of the first heating unit and the coil of the second heating unit is ≥5mm.

[0009] Furthermore, the ceramic matrix is ​​a silicon nitride-alumina composite ceramic with a density ≥95% and a thermal conductivity ≥20W / (m·K); the conductive heating element is a spiral structure formed by printing silver-palladium alloy paste with a line width of 0.1-5mm and a number of turns of 3-18.

[0010] Furthermore, the first heating control unit includes a resonant circuit, a power adjustment unit, and a magnetic field isolation unit. The resonant circuit is used to generate electromagnetic signals of a specific frequency band to drive the self-heating ceramic coil assembly to work. The power adjustment unit is used to adjust the heating power of the self-heating ceramic coil assembly. The magnetic field isolation unit is located outside the coil and is used to block the electromagnetic field coupling between adjacent self-heating ceramic coil assemblies.

[0011] Furthermore, the resonant frequency adjustment range of the resonant circuit is 2.5-8MHz, the frequency adjustment step is 0.1MHz, and the Q value is ≥150; the magnetic field isolation unit uses electromagnetic shielding material to wrap the outer surface of the resonant circuit and the coil heating element. The electromagnetic shielding material is copper foil or permalloy, and the shielding effectiveness is ≥40dB.

[0012] Furthermore, the multi-cigarette electromagnetic heating smoking device also includes a cigarette detection component, which is set inside the cigarette receiving cavity and is used to detect whether a cigarette is inserted into the corresponding cigarette receiving cavity.

[0013] Furthermore, the cigarette detection component is either an electromagnetic induction detection module or a pressure sensing detection module.

[0014] Furthermore, the control component also includes a central control unit, which is electrically connected to the first heating control unit, the second heating control unit, the cigarette detection component, and the power supply. The central control unit is used to send power distribution commands to the first heating control unit and / or the second heating control unit based on the cigarette insertion quantity and position information transmitted by the cigarette detection component.

[0015] Furthermore, the multi-cigarette electromagnetic heating device also includes a temperature feedback component, which is located close to the coil heating element and is used to transmit the detected temperature signal of the coil heating element to the central control unit. The central control unit independently adjusts the output power of the first heating unit and / or the second heating unit according to the temperature signal of the coil heating element.

[0016] Furthermore, the control method for the multi-cigarette electromagnetic heating device is configured as follows: Step S1: The central control unit performs a self-test on the first heating unit and the second heating unit; Step S2: The central control unit sends power control signals to the first heating unit and the second heating unit respectively based on the detection feedback signal from the cigarette detection component; Step S3: The central control unit adjusts the heating power of the first heating unit and the second heating unit respectively based on the temperature feedback signal from the temperature feedback component.

[0017] The cigarette in this application may also be referred to as an aerosol-generating product, which includes an aerosol-forming matrix that generates an aerosol through heating that can be directly inhaled into the lungs of the user through the user's mouth.

[0018] Preferably, the aerosol forming matrix is ​​a solid aerosol forming matrix. The aerosol forming matrix may include both solid and liquid components.

[0019] Preferably, the aerosol-forming matrix includes nicotine. In some preferred embodiments, the aerosol-forming matrix includes tobacco.

[0020] Preferably, each receptor is located inside a plug that is in direct contact with the aerosol-forming material.

[0021] A sensor is a material that can convert electromagnetic energy into heat. When placed in a undulating electromagnetic field, the eddy currents induced in the sensor cause it to heat up. When an elongated sensor is positioned in thermal contact with an aerosol-forming matrix, the aerosol-forming matrix is ​​heated by the sensor.

[0022] The aerosol generating article is designed to engage with an electrically operated aerosol generating device, including an induction heating source. The induction heating source or sensor generates a fluctuating electromagnetic field to heat a sensor located within the fluctuating electromagnetic field. In use, the aerosol generating article engages with the aerosol generating device such that the sensor is located within the fluctuating electromagnetic field generated by the sensor.

[0023] The length of the receptor is significantly greater than its width or thickness, for example, more than twice its width or thickness. Therefore, the receptor can be described as an elongated receptor. The receptor can be arranged generally longitudinally within the aerosol-generating matrix.

[0024] This means that the length of the elongated receptors is arranged approximately parallel to the longitudinal direction of the aerosol-generating matrix, for example, within plus or minus 10 degrees of the longitudinal direction of the aerosol-generating matrix.

[0025] In a preferred embodiment, the elongation receptor may be located at the radial center within the aerosol generating matrix and extend along the longitudinal axis of the aerosol generating matrix.

[0026] The receptor can be made of any material that can be heated inductively to a temperature sufficient to generate an aerosol matrix. Preferred receptors include metals or carbon.

[0027] Preferred sensors may comprise ferromagnetic materials, such as ferrite, ferromagnetic steel, or stainless steel. Suitable sensors may be aluminum or may include aluminum. Preferred sensors may be made of 400 series stainless steel, such as grade 410, 420, or 430 stainless steel.

[0028] Different materials will consume different amounts of energy when placed in an electromagnetic field with similar frequency and field strength. Therefore, the parameters of the sensor, such as material type, length, width, and thickness, can be varied within a known electromagnetic field to provide the required energy consumption.

[0029] The preferred sensor may be heated to a temperature exceeding 250 degrees Celsius. A suitable sensor may include a non-metallic core having a metallic layer disposed on the non-metallic core, such as metallic traces formed on the surface of a ceramic core.

[0030] The sensor may have an outer protective layer, such as a ceramic or glass protective layer encapsulating the elongated sensor, thereby forming a complete heating element. The sensor may include a protective coating formed of glass, ceramic, or inert metal on the core of the sensor material.

[0031] The receptors are arranged to be in thermal contact with the aerosol-forming matrix. Therefore, when the receptors are heated, the aerosol-forming matrix is ​​heated and aerosols are formed.

[0032] In one embodiment, a heating element including a sensor is inserted into an aerosol forming matrix, and the aerosol generating apparatus may include one or more elongated heating elements.

[0033] In another embodiment, the aerosol generating matrix may contain receptors.

[0034] Alternatively, the aerosol generating matrix may include multiple receptors, and the receptors may be elongated, granular, network-shaped, radial, tubular, hourglass-shaped, spiral, etc.

[0035] The aerosol generating device can generate a fluctuating electromagnetic field between approximately 1 MHz and 30 MHz, for example, between 2 MHz and 10 MHz, or for example, between 5 MHz and 7 MHz, through the induction coil of the induction emitter.

[0036] Preferably, the aerosol generating device is capable of generating a wave electromagnetic field with a field strength (H field) 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.

[0037] An aerosol generator is a portable or handheld device that can be comfortably held between the fingers of one hand. The shape of the aerosol generator is generally cylindrical. The aerosol generator can have a length between approximately 70 mm and approximately 120 mm.

[0038] An aerosol generating apparatus is used to describe an apparatus that interacts with an aerosol forming matrix of an aerosol generating article to generate an aerosol.

[0039] Preferably, the aerosol generating device is a heated smoking device that interacts with the aerosol generating matrix of the aerosol generating product to generate an aerosol that can be directly inhaled into the user's lungs through the user's mouth.

[0040] The power source can be any suitable power source, such as a DC voltage source, like a battery. In one embodiment, the power source is a lithium-ion battery. Alternatively, the power source can be a nickel-metal hydride battery, a nickel-cadmium battery, or a lithium-based battery, such as a lithium cobalt, lithium iron phosphate, lithium titanate, or lithium polymer battery.

[0041] 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.

[0042] 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.

[0043] As can be seen from the above technical solution, the advantages and positive effects of the multi-cigarette electromagnetic heating smoking device proposed in this application are as follows: 1. Effectively solves the problem of magnetic field interference in multi-coil heating: Addressing the core bottleneck of mutual coupling of coil magnetic fields in multi-cigarette cluster heating scenarios, this application adopts an integrated design of independent heating unit and magnetic field isolation unit, combined with a scientific layout with a spacing of no less than 5mm between adjacent coils, which can effectively block the electromagnetic field coupling path between adjacent coils, reducing the magnetic field interference intensity by more than 60%; at the same time, it ensures the temperature stability of the multi-cigarette heating process, with the heating uniformity error controlled within ≤1℃, significantly improving the consistency of tobacco heating taste, and completely improving the technical defects of local overheating and uneven temperature in existing multi-coil heating solutions.

[0044] 2. Significantly reduce equipment energy consumption and extend battery life: Based on the cigarette detection component, an intelligent dynamic power allocation mechanism is built, which can identify the working status of each heating unit in real time. When an idle heating unit is detected (no cigarette inserted), the unit is automatically controlled to enter a low-power sleep mode, without having to continuously maintain the heating standby power, thereby reducing the overall energy consumption of the equipment. Under the same power supply conditions, the equipment's battery life is extended, or the power consumption is reduced under the same usage time, solving the inherent problem of high energy consumption of existing multi-cigarette heating devices.

[0045] 3. Significantly improved heating efficiency: This application uses a self-heating ceramic coil assembly as the core heating element. This assembly combines the functions of resistance self-heating and electromagnetic induction emission, breaking through the performance limitations of traditional single-function heating elements. Compared with existing multi-cigarette heating devices (especially resistance heating schemes and conventional electromagnetic heating schemes), the heating response speed is faster and the energy conversion efficiency is higher. It can quickly reach the optimal heating temperature for tobacco, further optimizing the user experience. Attached Figure Description

[0046] 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.

[0047] Figure 1 This is a structural diagram of a multi-cigarette electromagnetic heating smoking device; Figure 2 This is a structural diagram of a self-heating ceramic coil assembly; Figure 3 This is a flowchart of the operation of a multi-cigarette electromagnetic heating smoke set.

[0048] The reference numerals in the attached figures are explained as follows: First heating unit: 11; Second heating unit: 12; First heating control unit: 21; Second heating control unit: 22; Central control unit: 3; Cigarette detection components: 4; Power supply: 5; Self-heating ceramic coil assembly: 6; Ceramic matrix: 61; Conductive heating element: 62; Temperature feedback component: 63; Magnetic field isolation unit: 64; Coil: 65; Cigarettes: 7. Detailed Implementation

[0049] 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.

[0050] 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.

[0051] In this specification and claims, several terms will be used, and unless otherwise indicated, these terms will be defined to have the following meanings: 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.

[0052] 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 specified significant digits and by applying conventional rounding techniques.

[0053] 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 alone, A and B simultaneously, or B 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.

[0054] 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.

[0055] 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: All other terms used herein that are specifically defined herein shall have the general meaning understood by one of ordinary skill in the art, in particular meaning that, upon reading the claims, specification and drawings of this patent, one can directly and without doubt determine how the technical solution of this patent can be implemented.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] Please refer to Figure 1 and Figure 2 This application provides a multi-cigarette electromagnetic heating smoking device, which includes: a cigarette heating component, a control component, and a power supply 5. The cigarette heating component is used to heat the cigarette 7 housed in the cigarette heating component during operation. The control component is used to control the heating component to heat. The power supply 5 is used to supply power to the cigarette heating component and the control component.

[0060] The cigarette heating assembly includes a first heating unit 11 and a second heating unit 12. The first heating unit 11 and the second heating unit 12 are respectively provided with independent cigarette receiving cavities and coil heating elements. The coil heating elements are respectively set separately in the cigarette receiving cavities.

[0061] The control components include a first heating control unit 21 and a second heating control unit 22. The first heating control unit 21 is electrically connected to the first heating unit 11 and is used to independently control the heating of the first heating unit 11. The second heating control unit 22 is electrically connected to the second heating unit 12 and is used to independently control the heating of the second heating unit 12.

[0062] In this application, each cigarette heating unit is equipped with a corresponding cigarette receiving cavity, and a coil heating element is installed inside the cigarette receiving cavity. The coil heating element is preferably a self-heating ceramic coil assembly 6. Through this self-heating ceramic coil assembly 6, the two functions of electromagnetic induction magnetic field emission and resistance self-heating can be realized simultaneously, which can efficiently and uniformly heat the tobacco matrix of the cigarette 7 inserted into the cigarette receiving cavity, ensuring the stability of the tobacco heating taste.

[0063] Specifically, the self-heating ceramic coil assembly 6 includes a ceramic substrate 61, a conductive heating element 62, and a coil 65. The conductive heating element 62 is fixedly disposed on the ceramic substrate 61, and the coil 65 is wound around the outer surface of the ceramic substrate 61. To effectively avoid magnetic field interference between adjacent heating units, this application explicitly stipulates that the distance between the coils 65 of any two adjacent heating units (such as the first heating unit 11 and the second heating unit 12) is not less than 5 mm, thereby blocking the electromagnetic field coupling path of adjacent coils 65 and ensuring that each heating unit operates independently and stably.

[0064] The ceramic substrate 61 is made of silicon nitride-alumina composite ceramic material. This composite ceramic material has excellent high-temperature resistance, thermal conductivity, and structural stability. Its density is not less than 95%, and its thermal conductivity is not less than 20 W / (m·K). It can quickly conduct heat and maintain temperature stability, avoiding local overheating. The conductive heating element 62 is formed by printing silver-palladium alloy paste, and the whole structure is spiral. Its line width is set to 0.1-5 mm, and the number of turns is controlled between 3-18 turns. At the same time, the conductive heating element 62 adopts a structural design that combines spiral printing with local thickening. The line width of the locally thickened section is 1.5-3 times that of the non-thickened section. This design can optimize the current conduction performance of the conductive heating element 62, improve heating efficiency and heating uniformity, and extend the service life of the component.

[0065] In this application, the first heating control unit 21 and the second heating control unit 22 have similar structures. For the sake of simplicity, the structure of the first heating control unit 21 will be used as an example for detailed explanation below. The second heating control unit 22 can be implemented with reference to the structure of the first heating control unit 21.

[0066] The first heating control unit 21 is configured to correspond to the cigarette heating unit. Its core components include a resonant circuit, a power adjustment unit, and a magnetic field isolation unit 64. Each unit has a clear division of labor and works together to ensure the stability and accuracy of the cigarette heating process.

[0067] The resonant circuit generates electromagnetic signals in a specific frequency band, which can precisely drive the self-heating ceramic coil assembly 6 to start and operate stably, providing basic energy support for heating the cigarette stick 7. Specifically, the resonant frequency adjustment band of the resonant circuit is set to 2.5-8MHz, the frequency adjustment step is 0.1MHz, and the circuit Q value is not less than 150, which can achieve precise fine-tuning of the frequency and stable resonance, ensuring the consistency of heating energy output.

[0068] The power adjustment unit can flexibly adjust the heating power of the self-heating ceramic coil assembly 6 according to the heating stage requirements of the cigarette 7 and real-time temperature feedback, achieving precise matching of heating power. The magnetic field isolation unit 64 is located outside the coil 65, and uses electromagnetic shielding material to fully enclose the outer surface of the resonant circuit and the coil heating element for protection. The electromagnetic shielding material is preferably copper foil or permalloy, and its shielding effectiveness is not less than 40dB, which can effectively block the electromagnetic field coupling between adjacent self-heating ceramic coil assemblies 6.

[0069] It is understandable that this structure, together with the layout design of adjacent coils 65 with a spacing of not less than 5mm mentioned above, forms a double anti-interference protection, ensuring that each heating unit operates independently and stably, and further ensuring the uniformity and consistency of heating multiple cigarettes.

[0070] The multi-cigarette electromagnetic heating smoking device is also equipped with a cigarette detection component 4, which is set in each cigarette receiving cavity. Its core function is to detect in real time whether a cigarette 7 is inserted in the corresponding cigarette receiving cavity, so as to provide accurate basic signal support for the subsequent power distribution and regulation of the central control unit 3.

[0071] The cigarette detection component 4 can be an electromagnetic induction detection module or a pressure sensing detection module. Both modules can accurately identify the insertion state of the cigarette 7, and can be flexibly selected according to the actual application scenario and assembly requirements.

[0072] The control components of the smoking device also include a central control unit 3, which is electrically connected to the first heating control unit 21, the second heating control unit 22, each cigarette detection component 4, and the power supply 5, forming a complete control link. As the control core of the entire smoking device, the central control unit 3 can receive the number and specific position information of the inserted cigarettes 7 transmitted by each cigarette detection component 4 in real time, and perform precise logical judgment based on the preset power allocation logic, sending power allocation commands to the first heating control unit 21 and / or the second heating control unit 22 to realize the intelligent allocation of heating power on demand.

[0073] Specifically, the power allocation logic is set as follows: the heating unit with inserted cigarette 7 is given priority to allocate more than 80% of the total power; when the number of inserted cigarette 7 is n (n≥2), the heating unit with inserted cigarette 7 is equally allocated the above-mentioned priority power; when some cigarette 7 is not inserted into the cigarette accommodating cavity, the self-heating ceramic coil assembly 6 of the corresponding heating unit automatically enters the low power consumption mode, and its working power is reduced to less than 10% of the normal heating state, thereby achieving energy consumption optimization.

[0074] In addition, the multi-cigarette electromagnetic heating device is equipped with a temperature feedback component 63. This component is arranged close to each coil heating element and can collect the temperature signal of the coil heating element in real time, and transmit the collected temperature signal synchronously to the central control unit 3. After receiving the temperature signal, the central control unit 3 performs a comprehensive comparison and analysis based on the preset temperature standard for heating the cigarette 7 and the aforementioned power distribution logic, and then independently adjusts the output power of the first heating unit 11 and / or the second heating unit 12 to ensure that the temperature of each coil heating element is always maintained within a reasonable range suitable for heating the cigarette 7, thus ensuring both temperature consistency and safety of multi-cigarette heating, while also taking into account energy consumption control requirements.

[0075] Please refer to Figure 3 The complete workflow of the multi-cigarette electromagnetic heating smoke set of this application is as follows: The complete workflow of the multi-cigarette electromagnetic heating smoke set in this application is as follows: 1. Initialization phase: After the smoking device is powered on, the control component immediately performs a self-test operation on the first heating unit 11, the second heating unit 12, and the cigarette detection sensor. The self-test time does not exceed 2 seconds, and the self-test pass rate is not less than 99.5%, ensuring that each functional module is in a normal and ready state.

[0076] 2. Cigarette detection stage: The cigarette detection sensor monitors the cigarette insertion status of each cigarette receiving cavity in real time and transmits the detection results to the central control unit 3 for dynamic power allocation, providing an accurate basis for subsequent power allocation.

[0077] 3. Resonance Adjustment Stage: The heating control unit automatically adjusts the output frequency of the high-frequency inverter circuit according to the real-time inductance value of the corresponding coil, so that the LC resonant circuit can quickly enter a stable resonance state. The entire adjustment process takes no more than 50 milliseconds.

[0078] 4. Power Distribution Stage: Based on the number and position information of inserted cigarettes, the power adjustment unit sends power control signals to the independent heating control units of each single coil according to the preset power distribution rules, so as to realize the dynamic and precise distribution of power.

[0079] 5. Temperature Closed-Loop Control Stage: The heating temperature is collected in real time by a temperature sensor integrated into the ceramic coil assembly. When the temperature reaches the preset heating temperature range (280-320℃), the control module automatically reduces the input power of the corresponding coil to stabilize the temperature within the preset range. The temperature fluctuation range does not exceed ±3℃, ensuring the uniformity of tobacco heating and the consistency of taste.

[0080] 6. Heating Stop Phase: When the cigarette stick is detected to be pulled out or the preset heating time is reached, the central control unit 3 immediately cuts off the power input to the corresponding coil, terminates the heating process, and ensures safety and reasonable energy consumption.

[0081] This embodiment provides a dual-cigarette electromagnetic heating smoking device, the specific structure and parameters of which are as follows: Two cigarette heating units are arranged symmetrically. Each cigarette holder has an inner diameter of 7.2mm, suitable for standard cigarette sizes. The self-heating ceramic coil assembly 6 has an inner diameter of 7.7mm, an axial length of 15mm, and the spacing between adjacent coils is strictly controlled at 5mm. The ceramic substrate 61 is made of silicon nitride-alumina composite ceramic (mass ratio 7:3), with a density of 96% and a thermal conductivity of 25W / (m²). K), possessing excellent thermal conductivity and structural stability; the conductive heating element 62 is a silver-palladium alloy (Ag:Pd=85:15), with a line width of 0.8mm and 8 turns, and adopts a local thickening design, with the thickened section having a line width of 1.6mm, which can optimize current conduction efficiency and heating uniformity.

[0082] Two independent heating control units are configured, each corresponding to one of the two cigarette heating units. Each resonant circuit has a frequency adjustment range of 2.5-8MHz and a Q value of 180, enabling efficient and stable resonant output. The magnetic field isolation unit 64 uses 0.1mm thick copper foil for full-wrap shielding, achieving a shielding effectiveness of 45dB, effectively blocking electromagnetic field coupling between adjacent coils. The power adjustment unit adopts PWM pulse width modulation, with a power adjustment range of 1-12W, enabling precise dynamic control of heating power.

[0083] The multi-cigarette electromagnetic heating device is also equipped with a cigarette detection component 4, which is correspondingly installed in each cigarette receiving cavity. Its core function is to detect in real time whether a cigarette is inserted in the corresponding cigarette receiving cavity, providing accurate basic signal support for the subsequent power distribution and control of the central control unit 3. In this embodiment, two cigarette detection components 4 are configured, using an electromagnetic induction detection module, which is set at the bottom of the cigarette receiving cavity, with a detection accuracy of 99.5%. The cigarette detection component 4 can also be a pressure sensor detection module. Both modules can achieve accurate identification of the cigarette insertion status, and can be flexibly selected according to the actual application scenario and assembly requirements.

[0084] The control components of the smoking device also include a central control unit 3, which is electrically connected to the first heating control unit 21, the second heating control unit 22, each cigarette detection component 4, and the power supply 5, forming a complete control link. In this embodiment, an STM32F103 chip is used as the central control unit 3, with a built-in dedicated power allocation algorithm. As the control core of the entire smoking device, the central control unit 3 can receive the number and specific position information of inserted cigarettes transmitted by each cigarette detection component 4 in real time, and make precise logical judgments based on the preset power allocation logic, sending power allocation instructions to the first heating control unit 21 and / or the second heating control unit 22 to realize on-demand intelligent allocation of heating power. Specifically, its power allocation logic is set as follows: the heating unit with inserted cigarettes is given priority to allocate more than 80% of the total power; when the number of inserted cigarettes is n (n≥2), the heating units with inserted cigarettes are evenly allocated the above-mentioned priority power; when some cigarette receiving cavities are not filled with cigarettes, the self-heating ceramic coil component 6 of the corresponding heating unit automatically enters a low-power mode, and its working power is reduced to less than 10% of the normal heating state, thereby achieving energy consumption optimization. In this embodiment, when both cavities are filled with cigarettes, each heating unit receives an average of 50% of the total power of 12W, i.e., each receives 6W of power; when only one cavity is filled with cigarettes, that heating unit receives 90% of the total power (i.e., 10.8W), and the other idle unit automatically enters a low-power mode, with a working power of only 0.8W (less than 10% of the normal heating state).

[0085] In addition, the multi-cigarette electromagnetic heating device is equipped with a temperature feedback component 63. This component is arranged close to each coil heating element and can collect the temperature signal of the coil heating element in real time, and transmit the collected temperature signal synchronously to the central control unit 3. In this embodiment, two temperature feedback components 63 are configured, using thick-film thermistors with a resistance of 10kΩ±10% at 25℃ and a response time of only 0.08s. After receiving the temperature signal, the central control unit 3 performs a comprehensive comparison and analysis based on the preset temperature standard for cigarette heating and the aforementioned power distribution logic, and then independently adjusts the output power of the first heating unit 11 and / or the second heating unit 12 to ensure that the temperature of each coil heating element is always maintained within a reasonable range suitable for cigarette heating. In this embodiment, precise temperature control of ±0.8℃ is achieved, which not only ensures the temperature consistency and safety of multi-cigarette heating, but also takes into account energy consumption control requirements.

[0086] This device has a built-in 2000mAh lithium battery, which provides stable power support and can effectively extend the battery life under low power distribution logic.

[0087] This application also provides a four-cigarette electromagnetic heating device, which is basically the same as the aforementioned two-cigarette electromagnetic heating device (Example 1) in terms of core structure and parameters. The main difference lies in the configuration and layout of the cigarette heating units, the model of the central control unit 3, the total power and the power distribution logic, as follows: There are four cigarette heating units arranged in a 2×2 matrix. The coil spacing between adjacent heating units is optimized to 6mm to further enhance the magnetic field anti-interference effect under the multi-coil layout. The central control unit 3 uses an STM32F407 chip, and the total power of the device is set to 15W to meet the power requirements of parallel heating of four cigarettes.

[0088] This four-cigarette electromagnetic heating device is also equipped with a cigarette detection component 4, which is correspondingly installed in each cigarette receiving cavity. Its core function is to detect in real time whether a cigarette is inserted in the corresponding cigarette receiving cavity, providing accurate basic signal support for the subsequent power distribution and control of the central control unit 3. The cigarette detection component 4 can adopt an electromagnetic induction detection module or a pressure sensing detection module. Both modules can achieve accurate identification of the cigarette insertion status, and can be flexibly selected according to the actual application scenario and assembly requirements.

[0089] The control components of the smoking device also include the aforementioned central control unit 3. This central control unit 3 is electrically connected to the independent heating control units corresponding to each cigarette heating unit, each cigarette detection component 4, and the power supply 5, forming a complete control link. As the control core of the entire smoking device, the central control unit 3 can receive real-time information on the number and specific position of cigarettes inserted from each cigarette detection component 4, and perform precise logical judgments based on preset power allocation logic to send power allocation commands to each independent heating control unit, thereby achieving intelligent on-demand allocation of heating power.

[0090] Specifically, the general power allocation logic is set as follows: the heating unit with inserted cigarettes is given priority to allocate more than 80% of the total power; when the number of inserted cigarettes is n (n≥2), the heating units of each inserted cigarette are evenly allocated the above-mentioned priority power; when some cigarette cavities are not filled with cigarettes, the self-heating ceramic coil assembly 6 of the corresponding heating unit automatically enters a low-power mode, and its working power is reduced to less than 10% of the normal heating state, thereby achieving energy consumption optimization. Considering the total power of this four-cigarette device is 15W, the targeted power allocation rule is as follows: when all four cigarette cavities are filled with cigarettes, the total power is evenly allocated to each heating unit, with each heating unit receiving 3.75W; when only two cigarettes are filled, each heating unit corresponding to an inserted cigarette receives 6.75W of power, and the remaining idle heating units automatically enter a low-power mode, with a working power of only 0.6W, meeting the low-power operation requirements.

[0091] In addition, this four-cigarette electromagnetic heating device is equipped with a temperature feedback component 63. This component is located close to each coil heating element and can collect the temperature signal of the coil heating element in real time, and transmit the collected temperature signal synchronously to the central control unit 3. After receiving the temperature signal, the central control unit 3 performs a comprehensive comparison and analysis based on the preset temperature standard for cigarette heating and the aforementioned power distribution logic, and then independently adjusts the output power of each heating unit to ensure that the temperature of each coil heating element is always maintained within a reasonable range suitable for cigarette heating. This ensures both temperature consistency and safety when heating multiple cigarettes in parallel, while also taking into account energy consumption control requirements.

[0092] Actual performance testing has verified that, under the condition of simultaneous heating of four cigarettes, the temperature difference between each cigarette does not exceed 1°C, demonstrating excellent temperature consistency. At the same time, its overall energy consumption is reduced by 52% compared to existing four-cigarette heating devices, resulting in significant energy savings and effectively solving the technical defects of existing multi-cigarette heating devices, such as high energy consumption and poor temperature consistency.

[0093] The remaining structure and parameters of this four-cigarette electromagnetic heating device are consistent with those of the aforementioned two-cigarette electromagnetic heating device, and will not be repeated here.

[0094] This embodiment uses a four-cigarette electromagnetic heating device as its core, designing three experimental groups with different parameter combinations. Existing single-resonant source driving multi-coil technology is used as a control group. The effectiveness of this patented solution is quantitatively verified through comparative experiments, focusing on verifying four core indicators: energy consumption, temperature consistency, response speed, and temperature control accuracy. The effectiveness in addressing the shortcomings of existing technologies is clearly demonstrated, as follows: This experiment adopted a design of "control group + 3 experimental groups". The control group is the existing technical solution, and the experimental groups are different parameter combinations based on the core technology of this invention (independent resonance control + magnetic field isolation + dynamic power distribution). All groups used four standard cigarettes of the same specification and the same heating time, and the same experimental environment (room temperature 25℃, humidity 50%RH). The experiment was repeated 3 times and the average value was taken.

[0095]

[0096] The experiment focused on testing five core indicators: operating energy consumption, temperature consistency of the four cigarettes (maximum temperature difference), temperature fluctuation amplitude, resonance adjustment response time, and temperature feedback response time. The specific results are shown in the table below:

[0097] Compared to the energy consumption of the control group in the prior art, the three experimental groups of this invention significantly reduced energy consumption by dynamically allocating power to allow idle units to enter a low-power mode, achieving the overall energy consumption reduction design goal of this invention and completely solving the defects of high energy consumption and serious waste in existing multi-cigarette heating devices.

[0098] The control group had a maximum temperature difference of 6.8℃ and a temperature fluctuation of ±4.2℃ among the four cigarettes, which could not guarantee the consistency of the taste of multiple cigarettes. In contrast, the three experimental groups of this invention, through the combination design of independent resonant control modules and reasonable coil spacing, effectively blocked the electromagnetic field coupling of adjacent coils, with a maximum temperature difference of ≤1.1℃ and a temperature fluctuation of ≤±0.9℃, achieving synchronous and uniform heating of four cigarettes.

[0099] This embodiment has three sets of parameter combinations covering three application scenarios: basic practicality, high performance, and low power consumption. This demonstrates the flexibility of the technical solution of this invention. Regardless of the parameter combination used, it can effectively solve the core defects of existing technologies such as high energy consumption and poor temperature consistency, and can achieve high response and precise temperature control to meet the needs of different users.

[0100] 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.

[0101] Similarly, it should be understood that in the above description of exemplary embodiments / specific implementations of the invention, various features of the invention are sometimes combined in a single embodiment / specific implementation or its figures and description, with the aim of simplifying the disclosure and aiding in the understanding of one or more of the various aspects of the invention. However, the method of description in this patent should not be construed as reflecting an intention that the claimed features of the invention are more than those expressly stated in each claim, except where explicitly stated otherwise or in obvious technical contradiction or exclusion. Rather, the inventive aspect reflected in the claims lies in not all the features of a single foregoing disclosed embodiment / specific implementation. Therefore, the claims following the detailed description are expressly incorporated herein by reference, each claim existing independently as a separate embodiment / specific implementation of the invention.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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 multi-cigarette electromagnetic heating smoking device, the multi-cigarette electromagnetic heating smoking device comprising: A cigarette heating assembly, a control assembly, and a power supply are provided. The cigarette heating assembly is used to heat a cigarette housed within it during operation. The control assembly is used to control the heating process. The power supply provides power to both the cigarette heating assembly and the control assembly. The cigarette heating assembly includes a first heating unit and a second heating unit. The first heating unit and the second heating unit are respectively provided with an independent cigarette receiving cavity and a coil heating element. The coil heating element is separately provided in the cigarette receiving cavity. The control component includes a first heating control unit and a second heating control unit. The first heating control unit is electrically connected to the first heating unit and is used to independently control the heating of the first heating unit. The second heating control unit is electrically connected to the second heating unit and is used to independently control the heating of the second heating unit.

2. The multi-cigarette electromagnetic heating smoking device according to claim 1, characterized in that, The coil heating element is a self-heating ceramic coil assembly, which includes a ceramic substrate, a conductive heating element, and a coil. The conductive heating element is disposed on the ceramic substrate. The coil is wound around the surface of the ceramic substrate. The distance between the coil of the first heating unit and the coil of the second heating unit is ≥5mm.

3. The multi-cigarette electromagnetic heating smoking device according to claim 2, characterized in that, The ceramic matrix is ​​a silicon nitride-alumina composite ceramic with a density ≥95% and a thermal conductivity ≥20W / (m·K); the conductive heating element is a spiral structure formed by printing silver-palladium alloy paste with a line width of 0.1-5mm and a number of turns of 3-18.

4. The multi-cigarette electromagnetic heating smoking device according to claim 2, characterized in that, The first heating control unit includes a resonant circuit, a power regulation unit, and a magnetic field isolation unit. The resonant circuit is used to generate electromagnetic signals in a specific frequency band to drive the self-heating ceramic coil assembly to work. The power adjustment unit is used to adjust the heating power of the self-heating ceramic coil assembly. The magnetic field isolation unit is located outside the coil and is used to block electromagnetic field coupling between adjacent self-heating ceramic coil assemblies.

5. The multi-cigarette electromagnetic heating smoking device according to claim 4, characterized in that, The resonant circuit has a resonant frequency adjustment range of 2.5-8MHz, a frequency adjustment step of 0.1MHz, and a Q value ≥150. The magnetic field isolation unit uses electromagnetic shielding material to wrap the outer surface of the resonant circuit and the coil heating element. The electromagnetic shielding material is copper foil or permalloy, and the shielding effectiveness is ≥40dB.

6. The multi-cigarette electromagnetic heating smoking device according to claim 1, characterized in that, The multi-cigarette electromagnetic heating smoking device also includes a cigarette detection component, which is disposed in the cigarette receiving cavity and is used to detect whether a cigarette is inserted into the corresponding cigarette receiving cavity.

7. The multi-cigarette electromagnetic heating smoking device according to claim 6, characterized in that, The cigarette detection component is either an electromagnetic induction detection module or a pressure sensing detection module.

8. The multi-cigarette electromagnetic heating smoking device according to claim 6, characterized in that, The control component further includes a central control unit, which is electrically connected to the first heating control unit, the second heating control unit, the cigarette detection component, and the power supply. The central control unit is used to send power distribution commands to the first heating control unit and / or the second heating control unit based on the cigarette insertion quantity and position information transmitted by the cigarette detection component.

9. The multi-cigarette electromagnetic heating smoking device according to claim 8, characterized in that, The multi-cigarette electromagnetic heating device also includes a temperature feedback component, which is located close to the coil heating element and is used to transmit the detected temperature signal of the coil heating element to the central control unit. The central control unit independently adjusts the output power of the first heating unit and / or the second heating unit according to the temperature signal of the coil heating element.

10. The multi-cigarette electromagnetic heating smoking device according to claim 9, characterized in that, The control method for the multi-cigarette electromagnetic heating smoking device is configured as follows: Step S1: The central control unit performs a self-test on the first heating unit and the second heating unit; Step S2: The central control unit sends power control signals to the first heating unit and the second heating unit respectively based on the detection feedback signal from the cigarette detection component; Step S3: The central control unit adjusts the heating power of the first heating unit and the second heating unit respectively according to the temperature feedback signal of the temperature feedback component.

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