Synergistic heating method of electromagnetic heating smoking set and electromagnetic heating smoking set

Abstract

The invention discloses a cooperative heating method of an electromagnetic heating smoking set and the electromagnetic heating smoking set. The electromagnetic heating smoking set comprises a peripheral heating module, a central induction heating module and a cooperative control module. The heating method of the cooperative control module comprises the steps that a high-frequency signal generator outputs a high-frequency current of 1MHz-30MHz to a peripheral heating module, and the peripheral heating module generates an alternating magnetic field to act on a central induction heating module in a heating cigarette for central heating; the peripheral heating module generates joule heat to be conducted to the periphery of the heated cigarette for peripheral heating; the temperature detection unit detects the temperature of the center induction heating module and the peripheral heating module; when the temperature of the central induction heating module reaches 250-350 DEG C and the temperature of the peripheral heating module reaches 150-300 DEG C, the power distribution unit adjusts the central heating power of the central induction heating module to account for 30-50% of the total heating power so as to maintain the temperature field stable. The purposes of increasing the heating area and maintaining the temperature field to be stable are achieved.

Description

Technical Field

[0001] This patent belongs to the field of novel tobacco technology, specifically relating to a synergistic heating method for electromagnetic heating smoking devices and the electromagnetic heating smoking device itself. Background Technology

[0002] Current products in the field of electromagnetic heating tobacco devices generally adopt a heating architecture with a single central induction plate. Their core relies on a small electromagnetic sensor built into the cigarette stick to generate eddy currents in an alternating magnetic field, thus heating the tobacco to produce aerosols. However, the size of the electromagnetic plate built into the cigarette stick is limited, allowing only localized heating of the central area of ​​the tobacco. The surrounding tobacco cannot be effectively heated, resulting in low heating efficiency. Furthermore, the transmitters of existing heating devices often use multi-strand copper coils, whose temperature resistance limit is ≤150℃, leading to significant heat loss through heat conduction during operation.

[0003] To overcome these limitations, some studies have attempted to increase the number of coil turns or improve the magnetic field strength, but these methods cannot fundamentally solve the problems of insufficient heating area and uneven temperature field. Therefore, developing a new technical solution that can achieve uniform heating of the entire tobacco surface has become the core requirement for the current research and development of electromagnetic heating smoking devices. Summary of the Invention

[0004] The purpose of this patent is to provide a synergistic heating method for electromagnetic heating smoke appliances and an electromagnetic heating smoke appliance, so as to increase the heating area and maintain a stable temperature field.

[0005] To solve the above-mentioned technical problems, this patent adopts the following technical solution: A method for coordinated heating of an electromagnetic heating smoke appliance, the electromagnetic heating smoke appliance comprising an outer peripheral heating module, a central induction heating module, and a coordinated control module; The peripheral heating module is positioned close to the outer periphery of the heated cigarette. The central induction heating module is located inside the heated cigarette. The collaborative control module is connected to the peripheral heating module to control the high-frequency current of the peripheral heating module; The collaborative control module includes a high-frequency signal generator, a temperature detection unit, and a power distribution unit; The heating methods of the collaborative control module include: Step 1: The high-frequency signal generator outputs a high-frequency current of 1MHz-30MHz to the peripheral heating module. The peripheral heating module generates an alternating magnetic field that acts on the central induction heating module inside the heated cigarette for central heating. The peripheral heating module itself generates Joule heat that is conducted to the outer periphery of the heated cigarette for peripheral heating. Step 2: The temperature detection unit detects the temperature of the central induction heating module and the peripheral heating module; when the temperature of the central induction heating module reaches 250℃-350℃ and the temperature of the peripheral heating module reaches 150-300℃, the power distribution unit adjusts the central heating power of the central induction heating module to account for 30-50% of the total heating power to maintain a stable temperature field.

[0006] Furthermore, step 2 includes the following steps: Step 21: The central induction heating module is heated under the action of an alternating magnetic field. When the temperature detection unit detects that the temperature of the central induction heating module reaches 250℃-350℃, the temperature detection unit transmits the detected temperature of the outer peripheral heating module to the power distribution unit. Step 22: The power distribution unit receives the temperature of the peripheral heating module. When the temperature of the peripheral heating module is below 150°C, the power distribution unit adjusts the peripheral heating power to 70-90% of the total heating power, so that the peripheral heating module heats up at the first heating rate. The total heating power includes the center heating power and the peripheral heating power of the peripheral heating module. Step 23: When the peripheral heating module in step 22 heats up to a temperature greater than or equal to 150°C, the power distribution unit enters the transition adjustment stage; During the transition adjustment phase, the power distribution unit controls the peripheral heating power to dynamically decrease, so that the peripheral heating module heats up at a second heating rate, which is less than the first heating rate; the power distribution unit controls the central heating power to dynamically increase, so that the temperature of the central induction heating module is maintained at 250℃-350℃. Step 24: When the peripheral heating module in step 23 heats up to 200-300℃, the power distribution unit adjusts the central heating power to account for 30-50% of the total heating power to maintain a stable temperature field.

[0007] Furthermore, step 2 also includes the following steps: Step 25: When the heating time of the peripheral heating module and the central induction heating module in step 24 reaches 3-5 minutes, disconnect the power supply module from the collaborative control module to stop the heating of the electromagnetic heating smoke appliance.

[0008] Furthermore, step 2 also includes the following steps: Step 26: When the heated cigarette is removed from the electromagnetic heating device, disconnect the power supply module from the collaborative control module to stop the heating operation of the electromagnetic heating device.

[0009] This patent also provides an electromagnetic heating smoke appliance, which applies the above-mentioned synergistic heating method of electromagnetic heating smoke appliances; the electromagnetic heating smoke appliance includes an outer peripheral heating module, a central induction heating module, a synergistic control module and a power supply module; The peripheral heating module is positioned close to the outer periphery of the heated cigarette for peripheral heating. The central induction heating module is located inside the heated cigarette to achieve central heating under the action of the alternating magnetic field generated by the outer peripheral heating module. The collaborative control module is connected to the peripheral heating module to control the high-frequency current of the peripheral heating module; The collaborative control module includes a high-frequency signal generator, a temperature detection unit, and a power distribution unit; The high-frequency signal generator is used to output high-frequency current to the peripheral heating module; The temperature detection unit is used to detect the temperature of the central induction heating module and the peripheral heating module; The power distribution unit is used to adjust the central heating power of the central induction heating module and / or the peripheral heating power of the peripheral heating module; The power supply module is used to supply power to the collaborative control module.

[0010] Furthermore, the peripheral heating module is a ceramic coil assembly; The ceramic coil assembly includes a ceramic substrate and a conductive coil; The ceramic substrate and the conductive coil are fixed by sintering or embedding.

[0011] Furthermore, the ceramic matrix is ​​made of Al2O3 or ZrO2 ceramic materials; The conductive coil is made of silver-palladium alloy or platinum-rhodium alloy. The diameter of the conductive coil is 0.1-0.3mm, and the number of turns of the conductive coil is 8-15.

[0012] Furthermore, the central sensing heating module is the central sensor. The central receptor is made of iron-based alloy or iron-nickel alloy.

[0013] Furthermore, the temperature detection unit includes an NTC thermistor or an infrared temperature measurement module.

[0014] In this patent, the heated cigarette includes an aerosol forming matrix, a support element, an aerosol cooling element, and a mouthpiece. Preferably, the aerosol forming matrix, support element, aerosol cooling element, and mouthpiece are generally cylindrical and have substantially similar outer diameters. For example, they have an outer diameter of at least 5 mm. Preferably, they have an outer diameter between approximately 5 mm and approximately 12 mm, for example, between approximately 5 mm and approximately 10 mm, or between approximately 6 mm and approximately 8 mm.

[0015] Preferably, the aerosol forming matrix can have a length between about 5 mm and about 15 mm, for example, between about 8 mm and about 12 mm. In one embodiment, the aerosol forming matrix can have a length of about 1 mm. In a preferred embodiment, the aerosol forming matrix has a length of about 12 mm.

[0016] The support element can be located directly downstream of the aerosol forming matrix and can be close to the aerosol forming matrix.

[0017] The support element can be formed from any suitable material or combination of materials. For example, the support element can be formed from one or more materials selected from the group consisting of: cellulose acetate; paperboard; crimped paper, such as crimped heat-resistant paper or crimped parchment; and polymeric materials, such as low-density polyethylene (LDPE). In a preferred embodiment, the support element is formed from cellulose acetate.

[0018] The support element may include a hollow tubular element. In a preferred embodiment, the support element includes a cellulose acetate tube.

[0019] The support element can have a length between approximately 5 mm and approximately 15 mm. In a preferred embodiment, the support element has a length of approximately 8 mm.

[0020] The aerosol cooling element can be located downstream of the aerosol forming matrix. For example, the aerosol cooling element can be located directly downstream of and adjacent to the support element. Alternatively, the aerosol cooling element can be located between the support element and the mouthpiece, with the mouthpiece located at the downstream end of the heated cigarette.

[0021] Preferably, the aerosol cooling element has low draw resistance. That is, preferably, the aerosol cooling element provides low resistance to air passing through the heated cigarette. Preferably, the aerosol cooling element has virtually no impact on the draw resistance of the heated cigarette.

[0022] The aerosol cooling element may include multiple longitudinally extending channels. These multiple longitudinally extending channels may be defined by a sheet material that has undergone one or more of curling, pleating, gathering, and folding to form the channels. Alternatively, the multiple longitudinally extending channels may be defined by a single sheet that has undergone one or more of curling, pleating, gathering, and folding to form multiple channels.

[0023] In some embodiments, the aerosol cooling element may include an aggregate sheet of material selected from the group consisting of: metal foil, polymeric materials, and substantially non-porous paper or paperboard. In some embodiments, the aerosol cooling element may include an aggregate sheet of material selected from the group consisting of: polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyethylene terephthalate (PET), polylactic acid (PLA), cellulose acetate (CA), and aluminum foil. In a preferred embodiment, the aerosol cooling element includes an aggregate sheet of biodegradable material. For example, an aggregate sheet of non-porous paper or an aggregate sheet of biodegradable polymeric material (such as polylactic acid).

[0024] Heated cigarettes may include a mouthpiece located at the mouth end of the heated cigarette. The mouthpiece may be located directly downstream of and abutting the aerosol cooling element. The mouthpiece may include a filter. The filter may be formed of one or more suitable filter materials. Many such filter materials are known in the art. In one embodiment, the mouthpiece may include a filter formed of cellulose acetate tow.

[0025] The mouthpiece can have a length between approximately 5 mm and approximately 20 mm. In a preferred embodiment, the mouthpiece has a length of approximately 14 mm. The mouthpiece can also have a length between approximately 5 mm and approximately 14 mm. In a preferred embodiment, the mouthpiece has a length of approximately 7 mm.

[0026] The elements of the heated cigarette (e.g., the aerosol-forming matrix and any other elements of the heated cigarette, such as support elements, aerosol cooling elements, and mouthpieces) are surrounded by an outer packaging. The outer packaging is formed of any suitable material or combination of materials. Preferably, the outer packaging paper is cigarette paper.

[0027] In this patent, the central receptor, as a sensor, refers to a material that can convert electromagnetic energy into heat.

[0028] Preferably, the length of the receptor is greater than its width or thickness, for example, more than twice its width or thickness.

[0029] The receptor is preferably needle-shaped, strip-shaped, or leaf-shaped. Preferably, the receptor has a length of 5 mm to 15 mm, for example, between 6 mm and 12 mm or between 8 mm and 10 mm. Preferably, the elongated receptor has a length substantially the same as the aerosol-forming matrix. Preferably, the receptor can have a width of 1 mm to 5 mm and a thickness of 0.01 mm to 2 mm, for example, 0.5 mm to 2 mm. A preferred embodiment may have a thickness between 10 micrometers and 500 micrometers, more preferably between 10 micrometers and 100 micrometers. If the receptor has a constant cross-section, such as a circular cross-section, it has a preferred width or diameter of 1 mm to 5 mm.

[0030] The sensor can be made of any material capable of being heated inductively to a temperature sufficient to generate an aerosol matrix. Preferred sensors include metals or carbon. Preferred sensors may include 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. Different materials will consume different amounts of energy when placed in an electromagnetic field with similar frequency and field strength. Therefore, parameters of the sensor, such as material type, length, width, and thickness, can be varied within a known electromagnetic field to provide the desired energy consumption.

[0031] 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.

[0032] 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 forms an aerosol. In one embodiment, the aerosol forming matrix may include receptors; alternatively, the aerosol forming matrix may include multiple receptors, which may be elongated, granular, mesh-like, radial, tubular, hourglass-shaped, spiral, etc.

[0033] The power supply module 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.

[0034] This patent provides a synergistic heating method for electromagnetic heating smoking devices and the electromagnetic heating smoking device itself. It constructs a dual heating module architecture with a self-heating outer peripheral heating module and an inductive heating central induction heating module. Through the cooperation of central heating and peripheral heating, it achieves a dual improvement in tobacco heating area and thermal efficiency, enhancing the product's market competitiveness. Furthermore, it adjusts the power ratio to stabilize the temperature field, solving the core pain points of existing electromagnetic heating smoking devices that rely on a single central induction plate, such as limited heating area, poor temperature resistance, and uneven temperature field.

[0035] This patent has the following advantages over the prior art: 1. Breaking through the limitations of traditional electromagnetic heating products that rely on a single central induction plate, it adopts the dual effect of peripheral ceramic coil heating through the Joule effect of resistance heating and electromagnetic induction heating, which increases the tobacco heating area by more than 30%. 2. The high-temperature resistance of the ceramic matrix solves the problems of insufficient temperature resistance and large heat loss in traditional multi-strand coils; 3. The dual-module collaborative control achieves temperature field optimization of central heat concentration and peripheral uniform heat distribution, avoiding burnt taste caused by local overheating and improving the consistency of aerosol taste. Attached Figure Description

[0036] The above content of this patent 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 solution.

[0037] Figure 1 This is a schematic diagram of the synergistic heating method of the electromagnetic heating smoke appliance in this patent; Figure 2 This is a schematic diagram of the electromagnetic heating smoke appliance in this patent.

[0038] The reference numerals in the attached figures are explained as follows: Collaborative control module: 1 Ceramic coil assembly: 2 Central receptors: 3 Power supply modules: 4 Heated cigarettes: 5 Detailed Implementation

[0039] The detailed features and advantages of this patent are described below in the specific embodiments. The content is sufficient to enable any person skilled in the art to understand the technical content of this patent 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 patent.

[0040] This specification also uses several compound terms to describe devices, components, equipment, etc. that include more than one function, or to assign additional functions to a corresponding device, component, equipment, etc. Those skilled in the art will understand that such compound terms can be implemented by a single or multiple devices, components, equipment, etc., as long as they are reasonable under the interpretation rules of this patent terminology.

[0041] It should be noted that in this specification, similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it does not need to be further defined and interpreted in subsequent figures. In this specification and claims, several terms will be used, and unless otherwise indicated, these terms will be defined as having the following meanings: The terms “comprising” or “having” have the same meaning as “containing”, and also include other forms of the term, such as the gerund and singular forms in English, meaning including but not limited to, and not intended to exclude, for example, other elements, components, integers or steps. All other terms used herein for special definition are intended to have the general meaning understood by one of ordinary skill in the art, and in particular, meaning that one of ordinary skill in the art, upon reading the claims, specification and drawings of this patent, can directly and without doubt determine how the technical solution of this patent can be implemented.

[0042] 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.

[0043] 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.

[0044] All references cited in this application are incorporated herein by way of quotation, to the extent that they do not contradict the disclosure herein. It will be apparent to those skilled in the art that products (apparatus, components, devices, compounds, compositions, materials, etc.) and methods (processes, steps, conditions, parameters, equipment, and test methods, equipment, etc.) not specifically described herein can be applied to the implementation of the inventions fully disclosed herein without the need for excessive experimentation. This patent is intended to cover all functional equivalents known in the art of the methods, apparatus, apparatus components, materials, processes, and techniques specifically described herein. All cited references include: The following publications are included: Marks' Standard Handbook for Mechanical Engineers (11th edition and other editions prior to this patent application date), published by McGraw-Hill, Inc.; DeGarmo's Materials and Processes in Manufacturing (13th edition and other editions prior to this patent application date), published by Wiley; Machinery's Handbook (32nd edition and other editions prior to this patent application date), published by IndustrialPress Inc.; Mechanical Design Handbook (6th edition and other editions prior to this patent application date), edited by Cheng Daxian, published by Chemical Industry Press; and Modern Mechanical Design Handbook (6th edition and other editions prior to this patent application date), edited by Wen Bangchun, published by Machinery Industry Press.

[0045] This patent 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 this patent. It will be clear to those skilled in the art that this patent can also be used in a variety of other applications.

[0046] like Figure 1 As shown, this patent provides a synergistic heating method for an electromagnetic heating smoke appliance, comprising: Start-up phase: Power supply module 4 supplies power to collaborative control module 1, high frequency signal generator initializes and outputs high frequency current of 1MHz-30MHz to ceramic coil assembly 2 (i.e., peripheral heating module). Dual-mode start-up phase: Under the action of high-frequency current, the ceramic coil assembly 2 generates an alternating magnetic field that acts on the central sensing element 3 (i.e., the central induction heating module), causing it to heat up through the eddy current effect. On the other hand, the ceramic coil assembly 2 itself generates Joule heat due to its resistance characteristics, which is conducted to the outer periphery of the heated cigarette 5 through the ceramic substrate. The premise for this controlled heating method to start adjusting the power distribution to the peripheral heating module is that the temperature of the central induction heating module has been heated to the smoking state. Otherwise, it will affect the user's smoking experience. That is, before the temperature of the central sensing element 3 reaches 250℃-350℃, the role of the ceramic coil assembly 2 is to generate an alternating magnetic field so that the central sensing element 3 first performs central heating. Although the ceramic coil assembly 2 has its own Joule heat, it does not actively control its peripheral heating power to perform more peripheral heating. In this way, the total heating power is basically the central heating power, and the central sensing element 3 can achieve the effect of rapid smoking. The temperature detection unit collects the temperatures of both the ceramic coil assembly 2 and the central sensing element 3 in real time. When the temperature of the ceramic coil assembly 2 is below 150°C, the power distribution unit of the collaborative control module 1 allocates 70%-90% of the total heating power to its self-heating circuit, and the ceramic coil assembly 2 accelerates its heating at the first heating rate. The total heating power is the sum of the central heating power of the central induction heating module and the peripheral heating power of the peripheral heating module. When the temperature of the ceramic coil assembly 2 exceeds 150°C, the power distribution unit enters a transition adjustment phase, gradually reducing the power proportion of the self-heating circuit of the ceramic coil assembly 2 while increasing the power proportion of the induced heating of the central sensing element 3, ultimately transitioning to the target proportion of the stable heating phase; dynamically lowering the self-heating power proportion of the ceramic coil assembly 2 (e.g., gradually decreasing from 90% to 50%-70%), so that the ceramic coil assembly 2 heats up at a second heating rate, which is less than the first heating rate; simultaneously increasing the induced heating power proportion of the central sensing element 3 (e.g., gradually increasing from 10%-30% to 30%-50%); in this patent, both the first heating rate and the second heating rate can dynamically change during the heating process of the ceramic coil assembly 2, that is, the first heating rate and the second heating rate do not have to be a specific value, but are dynamically adjusted synchronously within the dynamic adjustment range of the outer peripheral heating power of the ceramic coil assembly 2. Stable heating stage: When the temperature of ceramic coil assembly 2 reaches 200℃-300℃ and the temperature of central sensing element 3 reaches 250℃-350℃, the power distribution unit is adjusted to the target ratio so that the induced heating power of central sensing element 3 accounts for 30%-50% of the total heating power, maintaining a stable temperature field of central heat accumulation and peripheral uniform heating. Stop phase: When the heating time reaches the preset value (heating time reaches 2-10 minutes) or when the cigarette is detected to be removed, the collaborative control module 1 cuts off the high-frequency current and the device stops working.

[0047] The heated cigarette 5 typically takes the form of a cigarette stick, comprising an aerosol-forming matrix from distal to proximal end, a support element, an aerosol cooling element, and a mouthpiece. The support element, aerosol cooling element, and mouthpiece can be combined into a filter rod assembly. The aerosol-forming matrix is ​​usually a tobacco segment, within which a central sensor 3 is arranged. A ceramic coil assembly 2 is arranged around the tobacco segment to generate a magnetic field that causes the central sensor 3 to inductively heat the tobacco segment.

[0048] like Figure 2 As shown, this patent provides a dual-mode collaborative electromagnetic heating smoke appliance, which includes an outer peripheral heating module with dual functions of electromagnetic emission and resistance self-heating, and a central induction heating module that cooperates with the module, the two forming a collaborative heating circuit.

[0049] The electromagnetic heating smoke appliance includes: an outer peripheral heating module, a central induction heating module, a collaborative control module 1, and a power supply module 4.

[0050] As the core actuator of the device, the peripheral heating module simultaneously performs the dual functions of emitting an alternating magnetic field to the central induction heating module and generating heat through its own resistance under the action of alternating current. The peripheral heating module adopts a ceramic coil assembly 2, which can be composed of a ceramic substrate and an embedded conductive coil. The ceramic substrate and the conductive coil are fixed by sintering or embedding.

[0051] During the stable heating phase, the self-heating temperature of the peripheral heating module can be adjusted within the range of 200℃-300℃.

[0052] The central induction heating module and the peripheral heating module are arranged opposite to each other. The central induction heating module adopts a central sensor 3 structure. The central sensor 3 can be an internal component of the cigarette stick. It is made of iron-based alloy or iron-nickel alloy and is used to induce eddy currents and generate heat in the alternating magnetic field generated by the ceramic coil assembly 2.

[0053] Specifically, the proportion of eddy current heating power of the central sensor 3 to the total power during the stable heating phase is maintained at 30%-50%.

[0054] Specifically, the ceramic coil assembly 2 has a temperature resistance of ≥500℃ and achieves dual functions of magnetic field emission and self-heating in the 1MHz-30MHz frequency band; the ceramic substrate and conductive coil are made of high-temperature resistant and conductive materials. The ceramic substrate is made of Al2O3 or ZrO2 high-temperature resistant ceramic material with a temperature resistance of ≥500℃; the conductive coil is made of silver-palladium alloy or platinum-rhodium alloy and is embedded in a spiral groove on the surface of the ceramic substrate. The coil wire diameter is 0.1-0.3mm and the number of turns is 8-15 turns.

[0055] Specifically, the collaborative control module 1 can dynamically adjust the power distribution ratio between the peripheral heating module and the central induction heating module based on temperature feedback. The collaborative control module 1 may include a high-frequency signal generator, a power distribution unit, and a temperature detection unit.

[0056] Specifically, the high-frequency signal generator is used to output high-frequency current in the 1MHz-30MHz frequency band to the ceramic coil assembly 2.

[0057] Specifically, the power distribution unit is used to adjust the ratio of the self-heating power of the ceramic coil assembly 2 to the induction heating power of the central sensing element 3, so that the eddy current heating power of the central sensing element 3 accounts for 30%-50% of the total heating power during the stable heating phase.

[0058] Specifically, the temperature detection unit uses an NTC thermistor or an infrared temperature measurement module to collect the temperature data of the ceramic coil assembly 2 and the central sensing element 3 in real time, and sends it to the power distribution unit to adjust the heating power ratio, and then feeds it back to the high-frequency signal generator to realize power closed-loop regulation.

[0059] Specifically, the collaborative control module 1 has a PTC effect collaborative regulation function, which can help achieve overheat protection by utilizing the resistance-temperature characteristics of the ceramic substrate.

[0060] Specifically, power supply module 4 provides stable power to the entire device.

[0061] Example 1

[0062] like Figure 1-2 As shown, the ceramic substrate of the ceramic coil assembly 2 in the dual-mode electromagnetic heating smoke appliance is made of 99% pure Al2O3 ceramic, with the following dimensions: inner diameter 7.3mm, outer diameter 12mm, length 18mm, and a spiral groove with a depth of 0.2mm and a width of 0.2mm opened on the surface. The conductive coil is made of silver-palladium alloy with a silver content of 85% and a palladium content of 15%. The wire diameter is 0.2mm and the number of turns is 12. It is embedded in a spiral groove and fixed by high-temperature sintering. The two ends of the coil are led out to connect to the collaborative control module 1.

[0063] The central sensor 3 is made of 430 stainless steel and is a solid sheet with a width of 5mm and a length of 12mm. It is encapsulated at the central axis of the heated cigarette 5. The outer diameter of the cigarette is 7.2mm, which is fitted with the inner diameter of the ceramic coil assembly 2.

[0064] The collaborative control module 1 uses an STM32H743 microcontroller as its core, and the high-frequency signal generator uses an AD9854 chip, which can output an adjustable high-frequency signal from 1MHz to 30MHz. The temperature detection unit uses two NTC thermistors, which are respectively attached to the outer surface of the ceramic coil assembly 2 and the position of the cigarette near the center sensor 3. The power distribution unit uses an IRF640 field-effect transistor to construct a power regulation circuit.

[0065] Power supply module 4 consists of two 18650 lithium batteries connected in series, with an output voltage of 7.4V and a capacity of 2000mAh.

[0066] The steps of the synergistic heating method for electromagnetic heating smoke appliances are as follows: Start-up phase: Power supply module 4 supplies power to collaborative control module 1, high frequency signal generator initializes and outputs 10MHz high frequency current to ceramic coil assembly 2; Dual-mode start-up phase: Under the action of high-frequency current, the ceramic coil assembly 2 generates an alternating magnetic field that acts on the central sensing body 3, causing it to heat up through the eddy current effect; on the other hand, the ceramic coil assembly 2 itself generates Joule heat due to its resistance characteristics, which is conducted to the outer periphery of the heated cigarette 5 through the ceramic substrate. The temperature detection unit collects the temperature of both the ceramic coil assembly 2 and the central sensing element 3 in real time. When the temperature of the ceramic coil assembly 2 is below 150°C, the power distribution unit of the collaborative control module 1 allocates 80% of the total power to its self-heating circuit to accelerate the heating of the ceramic coil assembly 2. Stable heating stage: When the temperature of ceramic coil assembly 2 reaches 250℃ and the temperature of central sensing element 3 reaches 320℃, the power distribution unit is adjusted to the target ratio, the eddy current heating power of central sensing element 3 is 8W, and the total heating power is 20W, so that the induction heating power of central sensing element 3 accounts for 40% of the total heating power, maintaining the stability of the temperature field of central heat accumulation and peripheral uniform heat. Stop phase: When the heating time reaches the preset value (heating time reaches 3-5 minutes) or when the cigarette is detected to be removed, the collaborative control module 1 cuts off the high-frequency current and the device stops working.

[0067] Comparative Example 1

[0068] The difference between this comparative example and Example 1 is that only a central sensor is used for electromagnetic induction heating.

[0069] The central sensor is made of 430 stainless steel and is a solid sheet with a width of 5mm and a length of 12mm. It is encapsulated at the central axis of the heated cigarette. An electromagnetic induction coil is set around the heated cigarette to generate a magnetic field, so that the temperature of the central sensor reaches 320℃.

[0070] The heating performance of the heating appliances of Example 1 and Comparative Example 1 was tested, and the results are shown in Table 1.

[0071] Table 1: Comparison Table of Heating Performance Tests for Heating Appliances

[0072] The transmitter temperature limit refers to the highest safe temperature threshold that the core heat-generating component (electromagnetic induction coil or ceramic coil assembly) can withstand during long-term or instantaneous operation.

[0073] As shown in Table 1, the tobacco heating area of ​​the heating device in Example 1 covers more than 95% of the cross-section of the cigarette, the thermal efficiency is more than 75%, and no burnt taste is produced after continuous heating for 5 minutes. For different types of heated cigarettes, the aerosol taste consistency score is maintained at 8.5-9.2 points, which is a significant improvement compared to Comparative Example 1, which uses a single central induction plate for heating.

[0074] Compared with the prior art, the electromagnetic heating smoke appliance of this patent has the following advantages: 1. The operating frequency band of the ceramic coil assembly is limited to 1MHz-30MHz. Within this frequency band, efficient magnetic field emission and self-heating temperature of ≥200℃ can be achieved simultaneously, while avoiding the problems of large heat loss in the low frequency band and electromagnetic interference in the high frequency band, which facilitates the operation of coordinated heating. 2. The proportion of eddy current heating power of the central sensing element to the total heating power is strictly controlled between 30% and 50%. If it is less than 30%, the central heat collection will be insufficient, and if it is more than 50%, it will revert to the limitations of single induction heating. 3. The temperature resistance limit of the ceramic coil assembly is ≥500℃, ensuring structural stability without deformation or performance degradation during long-term high-temperature operation; 4. The ceramic matrix has a PTC effect (positive temperature coefficient characteristic). When the temperature exceeds 300℃, the resistance automatically increases, realizing self-regulating temperature control and avoiding overheating.

[0075] The terms and expressions used in this specification are for illustrative purposes and not for limitation. Their use is not intended to exclude any equivalents of the features or portions thereof shown, but rather to facilitate the understanding that various modifications may be possible within the scope of this patent claim. Therefore, it should be understood that while this patent has been specifically disclosed through preferred embodiments, exemplary embodiments, and optional features, variations or modifications of the concepts disclosed herein may be adopted by those skilled in the art, and such variations and modifications are therefore considered to be within the scope of this patent as defined by the appended claims. The specific embodiments given in this specification are examples of useful embodiments of this patent, and it will be apparent to those skilled in the art that this patent can be implemented using many variations of the devices, device components, and method steps disclosed herein.

[0076] The foregoing description of specific embodiments fully discloses the general features of this patent, enabling others to easily modify and / or adapt such embodiments for various applications by applying knowledge within the scope of the art, without excessive experimentation or deviation from the general concept of this patent. 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 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.

[0077] Furthermore, the scope of this patent should not be limited to any of the exemplary embodiments described above, but only to the appended claims and their equivalents.

Claims

1. A method for synergistic heating of an electromagnetic heating smoke appliance, characterized in that, The electromagnetic heating smoke appliance includes an outer peripheral heating module, a central induction heating module, and a collaborative control module; The outer peripheral heating module is positioned close to the outer periphery of the heated cigarette. The central induction heating module is located inside the heated cigarette. The collaborative control module is connected to the peripheral heating module to control the high-frequency current of the peripheral heating module; The collaborative control module includes a high-frequency signal generator, a temperature detection unit, and a power distribution unit. The heating method of the collaborative control module includes: Step 1: The high-frequency signal generator outputs a high-frequency current of 1MHz-30MHz to the peripheral heating module. The peripheral heating module generates an alternating magnetic field that acts on the central induction heating module inside the heated cigarette for central heating. The peripheral heating module itself generates Joule heat that is conducted to the outer periphery of the heated cigarette for peripheral heating. Step 2: The temperature detection unit detects the temperature of the central induction heating module and the peripheral heating module; when the temperature of the central induction heating module reaches 250℃-350℃ and the temperature of the peripheral heating module reaches 150-300℃, the power distribution unit adjusts the central heating power of the central induction heating module to account for 30-50% of the total heating power to maintain a stable temperature field.

2. The synergistic heating method for electromagnetic heating smoke appliances according to claim 1, characterized in that, Step 2 includes the following steps: Step 21: The central induction heating module performs central heating under the action of the alternating magnetic field. When the temperature detection unit detects that the temperature of the central induction heating module reaches 250℃-350℃, the temperature detection unit transmits the detected temperature of the outer peripheral heating module to the power distribution unit. Step 22: The power distribution unit receives the temperature of the peripheral heating module. When the temperature of the peripheral heating module is below 150°C, the power distribution unit adjusts the peripheral heating power to 70-90% of the total heating power, so that the peripheral heating module heats up at a first heating rate. The total heating power includes the center heating power and the peripheral heating power of the peripheral heating module. Step 23: When the peripheral heating module in step 22 heats up to a temperature greater than or equal to 150°C, the power distribution unit enters the transition adjustment stage; During the transition adjustment phase, the power distribution unit controls the peripheral heating power to dynamically decrease so that the peripheral heating module heats up at a second heating rate, which is less than the first heating rate; the power distribution unit controls the central heating power to dynamically increase so that the temperature of the central induction heating module is maintained at 250℃-350℃. Step 24: When the peripheral heating module in step 23 heats up to 200-300℃, the power distribution unit adjusts the central heating power to account for 30-50% of the total heating power to maintain a stable temperature field.

3. The synergistic heating method for electromagnetic heating smoke appliances according to claim 2, characterized in that, Step 2 also includes the following steps: Step 25: When the heating time of the peripheral heating module and the central induction heating module in step 24 reaches 2-3 min, 3-4 min, 4-5 min or 5-10 min, the power supply module is disconnected from the cooperative control module to stop the heating operation of the electromagnetic heating smoke appliance.

4. The synergistic heating method for electromagnetic heating smoke appliances according to claim 2, characterized in that, Step 2 also includes the following steps: Step 26: When the heated cigarette is removed from the electromagnetic heating device, the electrical connection between the power supply module and the collaborative control module is cut off to stop the heating operation of the electromagnetic heating device.

5. An electromagnetic heating smoke appliance, characterized in that, The electromagnetic heating smoke appliance uses the synergistic heating method of the electromagnetic heating smoke appliance according to any one of claims 1-4; The electromagnetic heating smoke appliance includes an outer peripheral heating module, a central induction heating module, a collaborative control module, and a power supply module; The peripheral heating module is positioned close to the outer periphery of the heated cigarette for peripheral heating. The central induction heating module is disposed inside the heated cigarette to perform central heating under the action of the alternating magnetic field generated by the outer peripheral heating module. The collaborative control module is connected to the peripheral heating module to control the high-frequency current of the peripheral heating module; The collaborative control module includes a high-frequency signal generator, a temperature detection unit, and a power distribution unit. The high-frequency signal generator is used to output the high-frequency current to the peripheral heating module; The temperature detection unit is used to detect the temperature of the central induction heating module and the outer peripheral heating module; The power distribution unit is used to adjust the central heating power of the central induction heating module and / or the peripheral heating power of the peripheral heating module; The power supply module is used to supply power to the collaborative control module.

6. The electromagnetic heating smoke appliance according to claim 5, characterized in that, The outer peripheral heating module is a ceramic coil assembly; The ceramic coil assembly includes a ceramic substrate and a conductive coil; The ceramic substrate and the conductive coil are fixed by sintering or embedding.

7. The electromagnetic heating smoke appliance according to claim 6, characterized in that, The ceramic matrix is ​​made of Al2O3 or ZrO2 ceramic material; The conductive coil is made of silver-palladium alloy or platinum-rhodium alloy. The diameter of the conductive coil is 0.1-0.3 mm, and the number of turns of the conductive coil is 8-15.

8. The electromagnetic heating smoke appliance according to claim 5, characterized in that, The central sensing heating module is a central sensor. The central receptor is made of iron-based alloy or iron-nickel alloy.

9. The electromagnetic heating smoke appliance according to claim 5, characterized in that, The temperature detection unit includes an NTC thermistor or an infrared temperature measurement module.

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