An electronic cigarette using electromagnetic heating

Abstract

The present application relates to an electronic cigarette using electromagnetic heating, comprising a filter assembly, a heating assembly connected to the filter assembly, and a bare cartridge, the bare cartridge being formed by extrusion molding of a porous carrier material, a mixed powder, a tobacco extract mixture, a particle aggregation inhibitor, a binder, and metal composite magnetic conductor particles, the metal composite magnetic conductor particles being uniformly distributed in the bare cartridge; a control circuit board is used to control an electromagnetic induction coil to generate an alternating magnetic field according to a predetermined heating power formula, the metal composite magnetic conductor particles are used to cut the alternating magnetic field lines of the alternating magnetic field in the alternating magnetic field to generate alternating current eddy currents inside the metal composite magnetic conductor particles, the current eddy currents cause the metal composite magnetic conductor particles to generate heat so that the bare cartridge releases smoke; wherein the metal composite magnetic conductor particles are formed by sintering of manganese-zinc ferrite doped with cerium sesquioxide, ytterbium sesquioxide, and vanadium pentoxide, and aluminum-doped molybdenum disilicide powder.

Description

Technical Field

[0001] This invention relates to the field of electronic cigarette technology, and more specifically to an electronic cigarette that uses electromagnetic heating. Background Technology

[0002] Currently, the global e-cigarette market is growing rapidly. According to reports, the global e-cigarette market grew by approximately 34.2% in 2021, with global retail sales reaching US$15.688 billion, and it continues to grow, indicating a vast market potential.

[0003] Compared to traditional cigarettes, e-cigarettes do not involve combustion. Instead, they heat the e-liquid or herbal particles in the cartridge at a relatively low temperature (generally below 500°C) to atomize or produce an aerosol. Because there is no combustion, the content of harmful substances such as carbon monoxide and tar is reduced, significantly minimizing the harm of secondhand smoke. Furthermore, since the e-liquid or herbal particles in the cartridge are pre-treated, many harmful substances have been removed, resulting in a substantial reduction in harmful substances. The smoke produced does not contain toxic substances such as tar, carbon monoxide, or nitrite, and it also does not produce secondhand smoke, which has a significant impact on those around the user.

[0004] In existing technologies, electronic cigarettes typically use heating wires to heat the atomizer. However, heating wires have low heating efficiency, high heat loss, poor heating effect, short lifespan, and poor heating uniformity. While some existing electronic cigarettes use electromagnetic heating, these still suffer from problems such as high coercivity and magnetic loss, and low magnetic permeability.

[0005] Furthermore, current heating control methods for e-cigarettes are not sufficiently efficient, either consistently using the same power output or employing PID control. Consistently using the same power output results in a preheating time of approximately 20 to 40 seconds to reach the target preheating temperature of the e-liquid cartridge. Moreover, as the e-liquid is consumed, continuing to use the same power output negatively impacts the user experience. PID control, on the other hand, requires a temperature detection device, leading to complex equipment, complex control circuitry, and high manufacturing costs. Summary of the Invention

[0006] The present invention aims to provide a novel electronic cigarette using electromagnetic heating to solve the problems of low heating efficiency, high coercivity and magnetic loss, and unreasonable heating control methods in the prior art.

[0007] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a novel electronic cigarette using electromagnetic heating, including a filter assembly, a heating assembly connected to the filter assembly, and a bare e-cigarette cartridge. The heating assembly is used to heat the bare e-cigarette cartridge, and the filter assembly is used to filter the smoke released from the heated cartridge. The heating assembly includes: a main body shell with an internal cavity, a control circuit board and a heating mechanism disposed within the cavity of the main body shell, the heating mechanism having a cavity for accommodating the bare e-cigarette cartridge, and the control circuit board electrically connected to the heating mechanism to control the power supply to the heating mechanism. The heating mechanism includes: a fixing base, a heat insulation layer, an electromagnetic induction coil, and a cartridge compartment. The fixing base is connected to the upper end of the main body shell, and a recess is provided within the fixing base. The cartridge compartment is disposed within the recess, and the heat insulation layer is provided between the inner wall of the recess and the outer wall of the cartridge compartment. The electromagnetic induction coil is disposed between the heat insulation layer and the cartridge compartment, and the electromagnetic induction coil is electrically connected to the control circuit board. A portion of the electromagnetic induction coil surrounds the outer wall of the cartridge compartment, and another portion... Located at the bottom of the cartridge compartment, the heating element heats the cartridge, causing the bare cartridge inside to release smoke. A heat insulation layer separates the cartridge compartment from the mounting base, preventing overheating of the main casing due to heat conduction. The bare cartridge is formed by extrusion molding of porous carrier material, mixed powder, tobacco extract mixture, particle aggregation inhibitor, binder, and metal composite magnetic conductor particles, with the metal composite magnetic conductor particles evenly distributed throughout. The control circuit board controls the electromagnetic induction coil to generate an alternating magnetic field according to a predetermined heating power formula. The metal composite magnetic conductor particles generate alternating eddy currents within the particles by cutting the alternating magnetic lines of force within the alternating magnetic field. These eddy currents generate heat, causing the bare cartridge to release smoke. The metal composite magnetic conductor particles are formed by sintering a mixture of manganese-zinc ferrite doped with cerium trioxide, ytterbium trioxide, and vanadium pentoxide with molybdenum disilicide powder doped with aluminum.

[0008] Preferably, the mass composition ratio of the porous carrier material, mixed powder, tobacco extract mixture, particle aggregation inhibitor, binder, and metal composite magnetic conductor particles is as follows: porous carrier material 20-30%, mixed powder 30-50%, tobacco extract mixture 25-40%, particle aggregation inhibitor 5-8%, binder 15-30%, and metal composite magnetic conductor particles 5-25%.

[0009] Preferably, the average particle size of the metal composite magnetic conductor particles is between 30 micrometers and 65 micrometers.

[0010] More preferably, the manganese-zinc ferrite is prepared by using ferric oxide, manganese dioxide, and zinc oxide in a molar ratio of 52.5:32:12.5 as the main raw material. The main raw materials are mixed evenly and then placed in a ball mill for a single ball milling process. The mass ratio of balls, material, and water during the first ball milling is 5:1:1.5. The ball milling process lasts for 2 hours at a speed of 300 r / min, with alternating forward and reverse rotation every 0.5 hours. After grinding, the ball-milled slurry is sent to a vacuum drying oven for heating and drying. After heating and drying, the resulting powder is sent to a pre-firing furnace for pre-firing at 950℃ for 3 hours. After pre-firing, the powder is cooled with the furnace. Then, 0.06%-0.08% cerium trioxide, 0.06%-0.07% ytterbium trioxide, and 0.07%-0.09% vanadium pentoxide are added to the cooled powder, along with other components according to their mass percentages. Molybdenum disilicide powder doped with aluminum at a ratio of 0.2%-0.6% was mixed and then fed into a ball mill for secondary ball milling. This process refined the powder into a pre-calcined material, exposing unreacted raw materials so that they could react completely during sintering. The mass ratio of balls, material, and water during the secondary ball milling was 5:1:1.5, and the milling lasted for 3 hours. The powder was then dried in a vacuum drying oven. A 15% PVA solution was added to the dried powder as a binder, with a powder-to-PVA solution mass ratio of 12:1. The dried powder and PVA solution were mixed evenly and then spray-granulated. The resulting particles were sieved, and particles with an average particle size between 30 and 65 micrometers were selected. These particles were then fed into a vacuum tube furnace and sintered at 1460°C for 4.5 hours with a nitrogen-oxygen mixture at a partial pressure of 6% oxygen. After the sintering period, nitrogen was introduced into the vacuum tube furnace to cool the particles to room temperature, thus obtaining the metal composite magnetic conductor particles.

[0011] Preferably, the matrix of the aluminum-doped molybdenum disilicide powder is Mo(Si). 0.7 Al 0.3 )2.

[0012] Preferably, an inner heat insulation layer is provided between the electromagnetic induction coil and the outer wall and bottom of the cigarette cartridge compartment.

[0013] Preferably, the predetermined heating power formula is as follows:

[0014]

[0015] Wherein, P is the predetermined heating power output by the electromagnetic induction coil;

[0016] P max The maximum heating power that the electromagnetic induction coil can output;

[0017] t is the time elapsed since the electromagnetically heated electronic cigarette was turned on, in seconds;

[0018] When the heating power calculated according to the predetermined heating power formula is greater than the maximum heating power that the electromagnetic induction coil can output, the electromagnetic induction coil generates an alternating magnetic field with the maximum heating power it can output.

[0019] More preferably, the control circuit board also has a built-in circuit protection device, which is used to detect the time for the electromagnetic induction coil to generate an alternating magnetic field at its maximum output heating power. When the time for the electromagnetic induction coil to generate an alternating magnetic field at its maximum output heating power is longer than a predetermined time, the circuit protection device cuts off the power supply to the electromagnetic induction coil and stops heating.

[0020] More preferably, the predetermined time is 4 to 6 seconds.

[0021] The first time period is 5 to 7 seconds.

[0022] Beneficial effects

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] The electronic cigarette using electromagnetic heating described in this invention boasts high heating efficiency, low heat loss, excellent heating effect, and a reasonable heating control method. It eliminates the need for preheating time, rapidly reaching the target preheating temperature of the e-cigarette cartridge. Furthermore, the heating power is dynamically adjusted as the e-cigarette is consumed, improving the user experience. The absence of a temperature detection device simplifies the device structure and reduces manufacturing costs.

[0025] The bare cigarette cartridge of this invention is formed by extrusion molding of a porous carrier material, mixed powder, tobacco extract mixture, particle aggregation inhibitor, binder, and metal composite magnetic conductor particles. The metal composite magnetic conductor particles are uniformly distributed throughout the bare cigarette cartridge. These metal composite magnetic conductor particles are formed by sintering a mixture of manganese-zinc ferrite doped with cerium trioxide (Ce₂O₃), ytterbium trioxide (Yb₂O₃), and vanadium pentoxide (V₂O₅) with aluminum-doped molybdenum disilicide powder. Compared with manganese-zinc ferrite samples without cerium trioxide (Ce₂O₃), ytterbium trioxide (Yb₂O₃), vanadium pentoxide (V₂O₅), and aluminum-doped molybdenum disilicide powder, the grain size uniformity is improved by 35.7%, the average magnetic loss is reduced by 18.6%, the average amplitude permeability is increased by 20.6%, and the coercivity is reduced by 8.52% (at 100 kHz) and 7.83% (at 20 kHz). Attached Figure Description

[0026] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the specific embodiments of this application to explain the technical solutions of the present invention and do not constitute a limitation on the technical solutions of the present invention.

[0027] Figure 1 and Figure 2 This is an overall cross-sectional view of the electronic cigarette using electromagnetic heating as described in this invention.

[0028] Figure 3 This is a partial structural diagram of the filter component of the electronic cigarette using electromagnetic heating as described in this invention.

[0029] Figure 4 This is a schematic diagram of the heating component of the electronic cigarette using electromagnetic heating as described in this invention.

[0030] Figure 5 This is an exploded structural diagram of the electronic cigarette using electromagnetic heating as described in this invention.

[0031] Figure 6 This is a schematic diagram of the filter tip of the electronic cigarette using electromagnetic heating as described in this invention.

[0032] Figure 7 This is a schematic diagram of the filter holder of the electronic cigarette using electromagnetic heating as described in this invention.

[0033] Figure 8 This is a schematic diagram of the cartridge portion of the electronic cigarette using electromagnetic heating as described in this invention.

[0034] Figure 9 This is a three-dimensional structural diagram of the filter holder of the electronic cigarette using electromagnetic heating as described in this invention.

[0035] Figure 10 yes Figure 4 A magnified schematic diagram of part A in the middle.

[0036] Figure 11 It is the fitting curve of the predetermined heating power formula. Detailed Implementation

[0037] The invention is described in more detail below to aid in understanding it.

[0038] like Figures 1 to 10As shown, the electronic cigarette using electromagnetic heating according to the present invention includes a filter assembly 100, a heating assembly 200 connected to the filter assembly 100, and a bare e-cigarette cartridge 300. The heating assembly 200 is used to heat the bare e-cigarette cartridge 300, and the filter assembly 100 is used to filter the smoke released from the heated bare e-cigarette cartridge 300. The heating assembly 200 includes: a main body shell 25 with an inner cavity, a control circuit board 26 and a heating mechanism 202 disposed in the cavity of the main body shell 25, the heating mechanism 202 having a cavity 224 for accommodating the bare e-cigarette cartridge 300, and the control circuit board 26 electrically connected to the filter assembly 100. The heating mechanism 02 is powered by a control power supply. The heating mechanism 02 includes: a fixed base 20, a heat insulation layer 24, an electromagnetic induction coil 23, and a cartridge compartment 22. The fixed base 20 is connected to the upper end of the main body shell 25. A recessed cavity is provided within the fixed base 20, and the cartridge compartment 22 is disposed within the recessed cavity. The heat insulation layer 24 is provided between the inner wall of the recessed cavity and the outer wall of the cartridge compartment 22. The electromagnetic induction coil 23 is disposed between the heat insulation layer 24 and the cartridge compartment 22, and is electrically connected to the control circuit board 26. A portion of the electromagnetic induction coil 23 surrounds the cartridge. The outer wall of the cartridge compartment 22, and another part located at the bottom of the cartridge compartment 22, heats the cartridge compartment 22 so that the bare cartridge 300 in the cavity 224 is heated and releases smoke; the heat insulation layer 24 is used to insulate the cartridge compartment 22 from the fixing base 20 to prevent the main body shell 25 from overheating due to heat conduction; the bare cartridge 300 is formed by extrusion molding of porous carrier material, mixed powder, tobacco extract mixture, particle aggregation inhibitor, binder and metal composite magnetic conductor particles, and the metal composite magnetic conductor particles are uniformly distributed in the bare cartridge; the control circuit board 26 is used to control the electromagnetic induction coil 23 to heat according to a predetermined power. An alternating magnetic field is generated. The metal composite magnetic conductor particles are used to generate alternating eddy currents inside the metal composite magnetic conductor particles because the surface of the metal composite magnetic conductor particles cuts the alternating magnetic field lines of the alternating magnetic field. The eddy currents cause the metal composite magnetic conductor particles to generate heat, thereby causing the bare smoke cartridge 300 to release smoke. The metal composite magnetic conductor particles are formed by sintering a mixture of manganese zinc ferrite doped with cerium trioxide (Ce2O3), ytterbium trioxide (Yb2O3) and vanadium pentoxide (V2O5) with aluminum-doped molybdenum disilicide powder.

[0039] Preferably, the mass composition ratio of the porous carrier material, mixed powder, tobacco extract mixture, particle aggregation inhibitor, binder, and metal composite magnetic conductor particles is as follows: porous carrier material 20-30%, mixed powder 30-50%, tobacco extract mixture 25-40%, particle aggregation inhibitor 5-8%, binder 15-30%, and metal composite magnetic conductor particles 5-25%.

[0040] Preferably, the average particle size of the metal composite magnetic conductor particles is between 30 micrometers and 65 micrometers.

[0041] More preferably, the manganese-zinc ferrite is prepared by using ferric oxide, manganese dioxide, and zinc oxide in a molar ratio of 52.5:32:12.5 as the main raw material. The main raw materials are mixed evenly and then placed in a ball mill for a single ball milling process. The mass ratio of balls, material, and water during the first ball milling is 5:1:1.5. The ball milling process lasts for 2 hours at a speed of 300 r / min, with alternating forward and reverse rotation every 0.5 hours. After the first ball milling, the milled slurry is sent to a vacuum drying oven for heating and drying. After heating and drying, the desired product is obtained... The powder was fed into a pre-firing furnace for pre-firing at 950℃ for 3 hours. After pre-firing, the powder cooled with the furnace. (Pre-firing can increase the activity of the powder, enabling it to produce a portion of the manganese-zinc ferrite phase. The applicant's research found that the activity of the powder decreases with increasing pre-firing temperature, and the activity of the pre-firing powder has a significant impact on the microstructure of the final sintered product. Excessive activity in the powder leads to faster grain growth under the same sintering conditions, which can easily result in abnormal grains.) After cooling, 0.06%-0.08% of a certain amount of [unspecified ingredient] was added to the powder. Cerium trioxide (Ce₂O₃), 0.06%-0.07% ytterbium trioxide (Yb₂O₃), and 0.07%-0.09% vanadium pentoxide (V₂O₅), mixed with molybdenum disilicide powder doped with aluminum at a mass ratio of 0.2%-0.6%, are fed into a ball mill for secondary ball milling. This process refines the powder into a pre-calcined material, exposing unreacted raw materials for complete reaction during sintering. The mass ratio of balls, material, and water during the secondary ball milling is 5:1:1.5, and the milling time is 3 hours. The mixture is then placed in a vacuum drying oven for drying. The powder was dried; 15% PVA solution was added as a binder to the dried powder, with a powder-to-PVA solution mass ratio of 12:1. The dried powder and PVA solution were mixed evenly and then spray-granulated. The resulting particles were sieved, and particles with an average particle size between 30 and 65 micrometers were separated. The particles were then fed into a vacuum tube furnace and sintered at 1460°C for 4.5 hours with a nitrogen-oxygen mixture at 6% oxygen partial pressure. After the sintering was completed, nitrogen was introduced into the vacuum tube furnace to cool the particles to room temperature, thus obtaining the metal composite magnetic conductor particles.

[0042] Preferably, the matrix of the aluminum-doped molybdenum disilicide powder is Mo(Si). 0.7 Al 0.3 )2.

[0043] In the crystal structure of molybdenum disilicide, silicon atoms form covalent bonds, while molybdenum atoms are metallic bonds. The molybdenum-silicon atom relationship lies between covalent bonds and metallic bonds, giving molybdenum disilicide the characteristic of coexistence of metallic and covalent bonds. By doping molybdenum disilicide powder with aluminum, the fracture toughness and compressive strength of molybdenum disilicide are improved, while the microstructure and magnetic properties of the metal composite magnetic conductor particles are also improved.

[0044] The surface morphology of the metal composite magnetic conductor particles was observed by scanning electron microscopy, and elemental quantitative analysis of the micro-area on the sample surface was performed. It was found that the average grain size inside the metal composite magnetic conductor particles was between 5 and 15 micrometers. Compared with the manganese zinc ferrite samples without cerium trioxide (Ce2O3), ytterbium trioxide (Yb2O3), and vanadium pentoxide (V2O5) and aluminum-doped molybdenum disilicide powder, the grain size uniformity was improved by 35.7%.

[0045] Under test conditions of room temperature, 100mT, and 100kHz, the soft magnetic AC performance of the metal composite magnetic conductor particles was tested using a soft magnetic AC measurement device. It was found that the average magnetic loss of the metal composite magnetic conductor particles was approximately 58.67, which was 18.6% lower than that of undoped cerium trioxide (Ce2O3), ytterbium trioxide (Yb2O3), and vanadium pentoxide (V2O5), as well as manganese zinc ferrite samples doped with aluminum disilicide powder.

[0046] At 100 kHz, the average amplitude permeability of the metal composite magnetic conductor particles was 4256, which was 20.6% higher than that of manganese zinc ferrite samples without cerium trioxide (Ce2O3), ytterbium trioxide (Yb2O3), and vanadium pentoxide (V2O5) and aluminum-doped molybdenum disilicide powder under the same conditions.

[0047] At 100 kHz, the coercivity of the metal composite magnetic conductor particles was 9.67, which was 8.52% lower than that of manganese zinc ferrite samples without cerium trioxide (Ce2O3), ytterbium trioxide (Yb2O3), and vanadium pentoxide (V2O5) and aluminum-doped molybdenum disilicide powder under the same conditions.

[0048] The coercivity of the metal composite magnetic conductor particles at 20 kHz was 7.86, which was 7.83% lower than that of manganese zinc ferrite samples without cerium trioxide (Ce2O3), ytterbium trioxide (Yb2O3), and vanadium pentoxide (V2O5) and aluminum-doped molybdenum disilicide powder under the same conditions.

[0049] Preferably, an inner heat insulation layer is provided between the outer wall and bottom of the electromagnetic induction coil 23 and the smoke cartridge compartment 22.

[0050] Preferably, the predetermined heating power formula is as follows:

[0051]

[0052] Wherein, P is the predetermined heating power output by the electromagnetic induction coil, in watts;

[0053] P max The maximum heating power that the electromagnetic induction coil can output is expressed in watts.

[0054] t is the time elapsed since the electromagnetically heated electronic cigarette was turned on, in seconds;

[0055] When the heating power calculated according to the predetermined heating power formula is greater than the maximum heating power that the electromagnetic induction coil can output, the electromagnetic induction coil generates an alternating magnetic field with the maximum heating power it can output.

[0056] It should be noted that in the formula for the predetermined heating power, the physical quantities (predetermined heating power P, maximum heating power P) are... max The unit (watts, seconds) for the start time (t) is only used to represent the magnitude of the value and does not participate in the calculations in the formula. This is because the predetermined heating power formula is a fitting formula derived through data fitting, rather than a physical or mathematical formula derived through rigorous mathematical derivation. For example, if t is 60 seconds, and the unit is changed to minutes, then t becomes 1 minute. The unit "second" is only used to represent the magnitude of the value "60" and does not participate in the calculations in the formula. If the unit "second" is not restricted to the formula, those skilled in the art may use the value "1 minute" to substitute into the formula for calculations, resulting in incorrect calculation results. The unit "watt" is the same; it does not participate in the calculations in the formula.

[0057] More preferably, the control circuit board also has a built-in circuit protection device. This circuit protection device is used to detect the time it takes for the electromagnetic induction coil to generate an alternating magnetic field at its maximum output heating power. When the time it takes for the electromagnetic induction coil to generate an alternating magnetic field at its maximum output heating power is longer than a predetermined time, the circuit protection device cuts off the power supply to the electromagnetic induction coil, stops heating, and after the first time of stop, reconnects the power supply to the electromagnetic induction coil, resets t to zero, and restarts the timing.

[0058] The predetermined heating power formula was derived through fitting a large amount of experimental data. To address the technical problem in existing technologies where consistently using the same heating power results in a preheating time of approximately 20 to 40 seconds to reach the target preheating temperature of the e-cigarette cartridge, this application applies the maximum heating power P within 2 seconds of the user activating the electromagnetically heated electronic cigarette. max Heating allows the e-cigarette cartridge to reach its target preheating temperature in the shortest possible time, fundamentally solving the problem of a preheating time of about 20 to 40 seconds that affects the user experience.

[0059] The value of 2 seconds was determined by the applicant through experiments, taking into account the maximum heating power P. max By determining the target preheating temperature of the e-cigarette cartridge, the required time can be easily calculated. Two seconds is an optimal value, satisfying the need to quickly reach the target preheating temperature of the cartridge without causing excessive use of maximum heating power P for an extended period. max This affects the lifespan of the electromagnetic induction coil.

[0060] After more than 2 seconds, in order to determine the appropriate heating power, the applicant designed a series of experiments. First, the applicant wanted to avoid placing a temperature detection device in the electronic cigarette, thus ruling out the possibility of using PID control. Second, the applicant wanted to obtain a single-valued function of real-time heating power relative to heating time, which would make control simpler.

[0061] Based on the above objectives, the applicant aims to go from 0 to P. max As a sample space for heating power, a time sample space of 0 to 3 minutes (i.e., 180 seconds, the average time to smoke a cigarette is about 3 minutes) was used. The time sample space was used as the horizontal axis, and the heating power sample space was used as the vertical axis. The heating power was gradually increased in an arithmetic sequence. 200 volunteers were selected as the sample space of testers. The 200 volunteers scored the e-cigarettes made with different heating power control methods. The data with the highest score was selected as the fitting data. Based on these fitting data, the curve and the corresponding function equation were fitted, and then the final heating power formula was determined.

[0062] Assume P max The power is 36 watts, and the power increases sequentially in an arithmetic progression over 180 seconds. Specifically, at t = 1 second and 2 seconds, the heating power output by the electromagnetic induction coil is P. maxThat is, 36 watts; at t=3 seconds, the heating power output of the electromagnetic induction coil is 0.6 watts, at t=4 seconds, the heating power is 0.8 watts, at t=5 seconds, the heating power is 1 watt, and so on, until t=180 seconds, when the heating power is 36 watts. Two hundred volunteers rated their experience using the electronic cigarette manufactured using this control method, and the scores were recorded. Scoring was done every 5 seconds.

[0063] Change the common difference of the arithmetic sequence to 0.1 watt, 0.3 watt, 0.4 watt, ..., and re-score each time it is changed, and record the score.

[0064] Using the same tolerance as the previous experiment, the power was decreased sequentially over 180 seconds in a geometric progression. The results were scored and recorded.

[0065] Over 180 seconds, the power is increased or decreased sequentially in a geometric progression, with scores recorded. The common ratios of the geometric progression are 0.1, 0.2, 0.3, ..., 2.

[0066] Sort all scores by size, select the top-ranked data to form a score data space, and plot the corresponding time values ​​and heating power from the selected data in a Cartesian coordinate system. Then, use SCILAB software to fit and generate a score data space. Figure 11 The curve shown corresponds to the equation, which is the predetermined heating power formula.

[0067] More preferably, the predetermined time is 4 to 6 seconds, and the first time is 5 to 7 seconds.

[0068] The predetermined time of 4 to 6 seconds and the first time of 5 to 7 seconds are also the preferred results obtained from the experiment. The specific experimental process is similar to the experimental process of obtaining the fitting formula (the predetermined heating power formula). In the same way, 200 volunteers scored the different predetermined time and first time, and selected the data with the highest scores as the preferred data for the corresponding predetermined time and first time.

[0069] After deriving the fitting formula (the predetermined heating power formula), it was found that during the experiment, when the electronic cigarette was controlled using this heating power formula, the maximum heating power P was typically reached at 22 to 23 seconds. max Once the maximum heating power is reached and no further power can be increased, if the maximum heating power is maintained for a time longer than the predetermined time (4 to 6 seconds), heating will stop. After the first stop time (5 to 7 seconds), the power will be reconnected, and timer t will be reset to zero before restarting. After restarting, the heating power will still be controlled according to the predetermined heating power formula and will not affect the scoring value.

[0070] More preferably, the porous carrier material is an inorganic porous carrier material or an organic porous carrier material. The inorganic porous carrier material is at least one of molecular sieves, zeolite powder, macroporous resin, porous ceramic powder, alumina powder, coral powder, porous silica gel, oak powder, foamed nickel, foamed aluminum, porous stainless steel, porous silicon carbide, and foamed glass. The organic porous carrier material is at least one of expanded tobacco stem powder, flower stem powder, kudzu root powder, coffee powder, and peppermint leaf powder.

[0071] The mixed powder comprises tobacco leaves, tobacco stems, and aromatic plants, wherein the tobacco leaves, tobacco stems, and aromatic plants are present in the following mass percentages: tobacco leaves 15-25%, tobacco stems 20-30%, and aromatic plants 30-50%. The tobacco leaves include at least one of the following: upper tobacco leaf powder, middle tobacco leaf powder, and lower tobacco leaf powder. The aromatic plants include at least one of the following: artemisia argyi, bitter orange blossom, Panax notoginseng flower stem, tea leaves, honeysuckle, dandelion, mint leaves, lotus leaves, coconut shell, frangipani, mesona chinensis, gynostemma pentaphyllum, Clerodendrum trichotomum, maca, Antrodia camphorata, tea stems, and fruits of Solanaceae plants.

[0072] The tobacco extract mixture comprises: tobacco extract and food-grade alcohol solution, wherein the tobacco extract and food-grade alcohol solution are present in the following mass ratios: tobacco extract 20-40%, food-grade alcohol solvent 60-80%. The food-grade alcohol solvent comprises: edible ethanol, glycerol, and propylene glycol, wherein the edible ethanol, glycerol, and propylene glycol are present in the following mass ratios: edible ethanol 5-15%, glycerol 15-50%, and propylene glycol 5-50%. Preferably, the concentration of the edible ethanol is 75 wt%.

[0073] The particle aggregation inhibitors include one or a combination of glyceryl triacrylate, glyceryl trimethacrylate, and pentaerythritol tetraacrylate.

[0074] The adhesive is at least one of the following: polyvinylpyrrolidone, vinylpyrrolidone-vinyl acetate copolymer, dextrin, starch, methylcellulose, ethylcellulose, CMC, CMCNa, guar gum, xanthan gum, and HPMC.

[0075] like Figure 1 and Figure 2 As shown, the filter assembly 100 includes: a top housing 11 with an internal chamber 10, a filter nozzle 12 disposed within the chamber 10, and a filter element 13 disposed within the filter nozzle 12. The top housing 11 is connected to the main body housing 25. In this embodiment, the heating assembly 200 and the filter assembly 100 are magnetically connected. In other embodiments, they can be connected by snap-fit ​​or screw-fit. The filter nozzle 12 and the filter element 13 are assembled by insertion, allowing users to easily and quickly replace the filter element after a period of use.

[0076] like Figure 1 and Figure 6 As shown, the filter tip 12 has an output channel 122, the filter element 13 is disposed in the output channel 122, and the output channel 122 is connected to the cavity 224, so that the smoke released by the heated tobacco cartridge 300 in the cavity 224 is output to the user for inhalation along the output channel 122. The upper opening of the output channel 122 is smaller, and the lower opening is larger.

[0077] like Figure 8 and Figure 10 As shown, the cartridge compartment 22 includes: a tube body 221 with an open upper end, an end cap 223 extending outward from the upper edge of the tube body 221, an external thread 222 on the outer wall of the tube body 221 near the end cap 223, and an internal thread 201 corresponding to the external thread 222 on the inner wall of the cavity. The tube body 221 forms the cavity 224. This cavity 224, based on the shape of the bare cartridge 300, is preferably cylindrical, which facilitates the manufacturing of the cartridge compartment, makes it easier to remove and replace the bare cartridge, and allows for more thorough contact between the bare cartridge and the side wall of the cartridge compartment during heating, resulting in better heating.

[0078] like Figure 2 , Figure 7 and Figure 10 As shown, the filter assembly 100 also includes a filter element fixing seat 14, which is connected to the top housing 11. The filter element fixing seat 14 has a through cavity 142, the upper end of which abuts against the filter element 13 and the lower end of which communicates with the cavity 224.

[0079] Specifically, the filter element fixing seat 14 includes: a seat body 141, a through cavity 142 disposed in the middle of the seat body 141, a stop ring portion 148 extending radially from the middle of the inner wall of the through cavity 142, a tubular portion 147 extending axially from the lower edge of the stop ring portion 148, and an annular groove 146 formed between the tubular portion 147 and the inner wall of the through cavity 142; wherein, the filter element 13 abuts against the stop ring portion 148, and the end cap portion 223 is inserted into the annular groove 146.

[0080] The annular groove 146 is also provided with a sealing ring 144, which is used to seal the cartridge chamber 22 and the filter element fixing seat 14.

[0081] Furthermore, the lower end of the filter element fixing base 14 is provided with at least one mounting hole 145, and a first magnet 21 is provided in the mounting hole 145. The fixing base 20 is also provided with a mounting groove 202 at one end relative to the filter element fixing base 14, and a second magnet 29 is provided in the mounting groove 202. The first magnet 21 and the second magnet 29 are magnetically attracted, so that the heating component 200 is magnetically connected to the filter component 100. By connecting the heating component 200 and the filter component 100 by magnetic attraction, it is convenient for the user to open them to replace the bare tobacco cartridge 300. When in use, the user holds the main body shell 25 and the top shell 11 with both hands respectively, and opens them from the first magnet 21 and the second magnet 29. At this time, the upper opening of the tobacco cartridge compartment 22 is exposed, so as to take out the used bare tobacco cartridge and replace it with a new bare tobacco cartridge.

[0082] like Figure 6 and Figure 7 As shown, the filter nozzle 12 includes: a filter nozzle body 121, an end cap 123 extending laterally outward from the lower end of the filter nozzle body 121, and a tube portion 124 extending vertically from the bottom of the end cap 123. A communicating air supply channel 122 is provided within the tube portion 124, the end cap 123, and the filter nozzle body 121. The outer wall of the tube portion 124 is also provided with a first thread 125, and the upper inner wall of the cavity 142 is provided with a second thread 143. The filter nozzle 12 and the filter element fixing seat 14 are screwed together by the first thread 125 and the second thread 143.

[0083] like Figure 4 As shown, the heating assembly 200 also includes a battery 27 and an interface 28 for charging the battery 27, the battery 27 being disposed within the cavity of the main housing 25. In other embodiments, an external power source, such as a mobile phone or power bank, can also be used for power supply.

[0084] It should be noted that the environmentally friendly heated tobacco cartridges used in this embodiment differ from those on the market that replace the tobacco in traditional cigarettes. Instead, they are naked tobacco cartridges directly pressed according to the latest cartridge formula, without external filters, baffles, or wrapping paper. This new type of naked tobacco cartridge uses less material and is more environmentally friendly.

[0085] Compared with the prior art, the electromagnetic heating electronic cigarette described in this embodiment, through the filter tip, filter heating mechanism, etc., forms a heating device with a simple and reliable structure, which is easy to disassemble and replace the bare tobacco cartridge and filter. It is well-suited for heating environmentally friendly heated non-combustible bare tobacco cartridges.

[0086] The preferred embodiments of the present invention have been described above, but are not intended to limit the invention. Those skilled in the art can make modifications and variations to the embodiments disclosed herein without departing from the scope and spirit of the invention.

Claims

1. An electronic cigarette using electromagnetic heating, characterized in that, The electromagnetically heated electronic cigarette includes a filter assembly, a heating assembly connected to the filter assembly, and a cartridge. The heating assembly heats the cartridge, and the filter assembly filters the smoke released from the heated cartridge. The heating assembly includes a main body shell with an internal cavity, a control circuit board and a heating mechanism located within the cavity of the main body shell, and a cavity for accommodating the cartridge. The control circuit board is electrically connected to the heating mechanism to control the power supply for the heating mechanism. The heating mechanism includes a mounting base, a heat insulation layer, an electromagnetic induction coil, and a cartridge compartment. The mounting base is connected to the upper end of the main body shell and has a recessed cavity. The cartridge compartment is located within the recessed cavity, and the heat insulation layer is located between the inner wall of the recessed cavity and the outer wall of the cartridge compartment. The electromagnetic induction coil is located between the heat insulation layer and the cartridge compartment and is electrically connected to the control circuit board. A portion of the electromagnetic induction coil surrounds the outer wall of the cartridge compartment, and another portion is located at the bottom of the cartridge compartment, heating... The cartridge compartment, or bare cartridge within the cavity, is heated to release smoke. A heat insulation layer separates the cartridge compartment from the mounting base, preventing overheating of the main body shell due to heat conduction. The bare cartridge is formed by extrusion molding of porous carrier material, mixed powder, tobacco extract mixture, particle aggregation inhibitor, binder, and metal composite magnetic conductor particles, with the metal composite magnetic conductor particles evenly distributed throughout. The control circuit board controls the electromagnetic induction coil to generate an alternating magnetic field according to a predetermined heating power formula. The metal composite magnetic conductor particles generate alternating eddy currents within the particles by cutting the alternating magnetic lines of force within the alternating magnetic field. These eddy currents generate heat, causing the bare cartridge to release smoke. The metal composite magnetic conductor particles are formed by sintering a mixture of manganese-zinc ferrite doped with cerium trioxide, ytterbium trioxide, and vanadium pentoxide with molybdenum disilicide powder doped with aluminum.

2. The electronic cigarette using electromagnetic heating according to claim 1, characterized in that, The mass composition ratio of the porous carrier material, mixed powder, tobacco extract mixture, particle aggregation inhibitor, binder, and metal composite magnetic conductor particles is as follows: porous carrier material 20-30%, mixed powder 30-50%, tobacco extract mixture 25-40%, particle aggregation inhibitor 5-8%, binder 15-30%, and metal composite magnetic conductor particles 5-25%.

3. The electronic cigarette using electromagnetic heating according to claim 1, characterized in that, The average particle size of the metal composite magnetic conductor particles is between 30 micrometers and 65 micrometers.

4. The electronic cigarette using electromagnetic heating according to claim 1, characterized in that, The manganese-zinc ferrite is prepared by using ferric oxide, manganese dioxide, and zinc oxide in a molar ratio of 52.5:32:12.5 as the main raw materials. The main raw materials are mixed evenly and then subjected to a single ball milling process. The mass ratio of balls, material, and water in the single ball milling is 5:1:1.

5. The single ball milling lasts for 2 hours at a speed of 300 r / min, with alternating forward and reverse rotation every 0.5 hours. After the single ball milling, the slurry is sent to a vacuum drying oven for heating and drying. After heating and drying, the resulting powder is sent to a pre-firing furnace for pre-firing at 950℃ for 3 hours. After pre-firing, the powder is cooled with the furnace. Then, 0.06%-0.08% cerium oxide, 0.06%-0.07% ytterbium oxide, and 0.07%-0.09% vanadium pentoxide are added to the cooled powder, along with a mixture of 0. Molybdenum disilicide powder doped with aluminum (0.2%-0.6%) is mixed and then fed into a ball mill for secondary ball milling. This process refines the powder into a pre-calcined material, exposing unreacted raw materials for complete reaction during sintering. The mass ratio of balls, material, and water during the secondary ball milling is 5:1:1.5, and the milling lasts for 3 hours. The powder is then dried in a vacuum drying oven. A 15% PVA solution is added to the dried powder as a binder, with a powder-to-PVA solution mass ratio of 12:

1. The dried powder and PVA solution are mixed evenly and then spray-granulated. The resulting particles are sieved, and particles with an average particle size between 30 and 65 micrometers are selected. These particles are then fed into a vacuum tube furnace and sintered at 1460°C for 4.5 hours using a nitrogen-oxygen mixture with a 6% oxygen partial pressure. After sintering, nitrogen is introduced into the vacuum tube furnace to cool the particles to room temperature, yielding the metal composite magnetic conductor particles.

5. The electronic cigarette using electromagnetic heating according to claim 4, characterized in that, The matrix of the aluminum-doped molybdenum disilicide powder is Mo(Si). 0.7 Al 0.3 )2.

6. The electronic cigarette using electromagnetic heating according to claim 1, characterized in that, An inner heat insulation layer is also provided between the electromagnetic induction coil and the outer wall and bottom of the cigarette cartridge compartment.

7. The electronic cigarette using electromagnetic heating according to claim 1, characterized in that, The formula for the predetermined heating power is as follows: Wherein, P is the predetermined heating power output by the electromagnetic induction coil; P max The maximum heating power that the electromagnetic induction coil can output; t is the time elapsed since the electromagnetically heated electronic cigarette was turned on, in seconds; When the heating power calculated according to the predetermined heating power formula is greater than the maximum heating power that the electromagnetic induction coil can output, the electromagnetic induction coil generates an alternating magnetic field with the maximum heating power it can output.

8. The electronic cigarette using electromagnetic heating according to claim 1, characterized in that, The control circuit board also has a built-in circuit protection device, which is used to detect the time for the electromagnetic induction coil to generate an alternating magnetic field at its maximum output heating power. When the time for the electromagnetic induction coil to generate an alternating magnetic field at its maximum output heating power is longer than a predetermined time, the circuit protection device cuts off the power supply to the electromagnetic induction coil and stops heating.

9. The electronic cigarette using electromagnetic heating according to claim 8, characterized in that, The predetermined time is 4 to 6 seconds.

10. The electronic cigarette using electromagnetic heating according to claim 8, characterized in that, The heating is stopped and then the power supply to the electromagnetic induction coil is reconnected after a first period of time; the first period of time is 5 to 7 seconds.

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