A cartridge utilizing electromagnetic induction heating and a heating method and electronic cigarette thereof

Abstract

The present application relates to the technical field of electronic cigarettes, and provides a cartridge utilizing electromagnetic induction heating, a heating method thereof and a smoking set. The cartridge comprises a smoking section, a temperature reducing section, a filtering section and a control circuit board. The smoking section comprises an upper part, a lower part, plant smoking particles and an electromagnetic induction heater. The upper part and the lower part are both provided with temperature sensors and metal heating sheets. The electromagnetic induction heater is divided into at least two groups of electromagnetic induction coils. The temperature reducing section is provided with a plurality of paramagnetic points. The present application can more clearly and accurately master the heating temperature of the plant smoking particles at different stages, and the plant smoking particles are heated in multiple temperature zones to adjust the atomization of the plant smoking particles at multiple temperature zones, so as to finally control the plant smoking particles in the best atomization stage. The present application has high precision, high energy efficiency and fast heating, can automatically match the electromagnetic induction heater with plant smoking particles of different tastes in the smoking section, can reach the best working temperature in a short time, has good temperature control effect, and can quickly smoke and has high atomization quality.

Description

Technical Field

[0001] This invention relates to the field of electronic cigarette technology, and more particularly to a cartridge heated by electromagnetic induction, a heating method thereof, and an electronic cigarette. Background Technology

[0002] Traditional electronic cigarettes typically use resistance heaters to atomize the e-liquid. This heating method is energy inefficient, has a slow temperature rise, and cannot reach the optimal temperature quickly, affecting the vapor production speed and effect. Furthermore, these heaters have a relatively short lifespan.

[0003] Heated tobacco products, compared to traditional tobacco products, retain a similar smoking experience while offering significant improvements in controlling harmful components in the smoke, minimizing smoke release, and reducing ash pollution. They are gradually gaining consumer acceptance. Heated tobacco products typically deliver the aroma of tobacco to the consumer through a "heat-not-burn" method, where the tobacco is heated at a relatively low temperature (generally below 500℃). Currently, the heating methods for non-combustible tobacco devices on the market mainly fall into three categories:

[0004] 1) Ceramic heating element: Represented by IQOS, the ceramic heating element has an alumina ceramic substrate with a thickness of about 0.5mm. This type of heating element is expensive, easy to break, and does not heat the tobacco evenly. For tobacco with a circular cross-section, only one line is heated, resulting in a lot of waste.

[0005] 2) Columnar needle-type heating core: The heating core of this type is cylindrical with a needle-shaped cone at the top. This method has a larger heating range and higher uniformity than ceramic plate heating. However, due to the thicker core diameter, the tobacco insertion resistance is greater, and the tobacco is more likely to break.

[0006] 3) Ring-type heating element: In this type, the heating element is ring-shaped, and the tobacco is inserted into the ring for heating. The heat distribution gradually increases from the center of the tobacco's circular cross-section outwards, and most of the temperature acting on the cigarette is in the cigarette paper area. This heat distribution affects the taste of the heated tobacco. Summary of the Invention

[0007] The present invention aims to solve at least one of the above technical problems and provide an electromagnetic induction heating cartridge and its heating method that are energy efficient, heat up quickly, can reach the optimal working temperature in a short time, and have good temperature control.

[0008] One aspect of the present invention is to provide a cigarette cartridge heated by electromagnetic induction, comprising a smoke-generating section, a cooling section, a filtering section and a control circuit board arranged sequentially in an axially upward direction.

[0009] The smoke-generating section includes an upper part, a lower part, plant smoke particles, and an electromagnetic induction heater. The electromagnetic induction heater includes at least two sets of electromagnetic induction coils. The upper part and the lower part are located at the top and bottom of the electromagnetic induction heater, respectively. The outer wall of the smoke-generating section is provided with a heat insulation pipe. The electromagnetic induction heater is arranged around the heat insulation pipe and is divided into at least two sets of electromagnetic induction coils along the length of the heat insulation pipe. These are an upper electromagnetic induction coil near the top, a lower electromagnetic induction coil near the bottom, and N electromagnetic induction coils located in the middle. The N electromagnetic induction coils located in the middle include a first electromagnetic induction coil, a second electromagnetic induction coil, ..., an Nth electromagnetic induction coil arranged sequentially from the top to the bottom, where N is an integer ≥ 0. When N = 0, the electromagnetic induction heater is only divided into an upper electromagnetic induction coil and a lower electromagnetic induction coil.

[0010] The upper part is provided with an upper temperature sensor and an upper metal heating element, with the sensing surface of the upper temperature sensor passing through the upper part and facing into the smoke-generating section; the lower part is provided with a lower temperature sensor and a lower metal heating element, with the sensing surface of the lower temperature sensor passing through the lower part and facing into the smoke-generating section; the upper temperature sensor and the lower temperature sensor are used to measure the temperature inside the smoke-generating section, and the upper metal heating element and the lower metal heating element are both located at the axial position of the smoke-generating section and extend into the plant smoke-generating particles;

[0011] The upper temperature sensor, lower temperature sensor, upper electromagnetic induction coil, lower electromagnetic induction coil, first electromagnetic induction coil, second electromagnetic induction coil, ..., Nth electromagnetic induction coil are all connected to a control circuit board. The control circuit board is used to receive temperature signals sent by the upper temperature sensor and lower temperature sensor, and to send control signals to the upper electromagnetic induction coil, lower electromagnetic induction coil, first electromagnetic induction coil, second electromagnetic induction coil, ..., Nth electromagnetic induction coil according to the temperature signals, so that the different groups of electromagnetic induction coils can be independently connected or disconnected from the power supply.

[0012] The plant-based smoky granules are made by mixing plant granules and metal powder, with a volume ratio of plant granules to metal powder of 2 to 10:1; the plant granules are obtained by extruding plant flower and leaf powder, binder and fragrance, and then drying.

[0013] The cooling section is used to guide and cool the smoke and to initially filter the powdery substances in the smoke. The cooling section has multiple metal paramagnetic points. The metal paramagnetic points (21) are connected to the control circuit board (4). The Curie temperature of the metal paramagnetic points (21) is the smoke generation temperature of the plant particles. It is used to control the heating temperature of the electromagnetic induction heater (14) by the control circuit board (4) to identify the smoke cartridge parameters. The filtering section is used to filter the powdery substances in the smoke.

[0014] Preferably, the connection between the upper temperature sensor and the upper part is sealed, and the connection between the lower temperature sensor and the lower part is sealed.

[0015] Preferably, the upper part is a metal cover.

[0016] Preferably, the metal heating element is in the shape of a straight, rolled, spiral, or multi-piece structure.

[0017] Preferably, the metal heating element is made of one or more of the following materials: iron, nickel, molybdenum, chromium, and tungsten.

[0018] Preferably, the method for preparing the plant-based smoke particles is as follows:

[0019] a. Remove dust and disinfect the plant flowers and leaves, then crush them into powder and pass them through a 100-300 mesh sieve;

[0020] b. Mix the obtained powder with binder and fragrance, extrude it into shape, and dry it to obtain plant granules;

[0021] c. Mix the obtained plant particles with the metal powder evenly to obtain plant fuming particles.

[0022] Preferably, the pulverization in step a specifically involves: first coarsely pulverizing into powder that can pass through a 30-70 mesh sieve, and then finely pulverizing into powder that can pass through a 100-300 mesh sieve.

[0023] Preferably, the particle size of the plant smoke particles is 18-100 mesh, and the particle size distribution of the metal powder is 60-70% of 500-600 micrometers, and at least 90% of 800 micrometers and below.

[0024] Preferably, the metal powder includes one or more of iron oxide, titanium oxide, manganese oxide, cerium oxide, and zirconium oxide.

[0025] Preferably, the cooling section has a gear-shaped cross-section and several through holes in the middle; the filter section is filter cotton.

[0026] Another aspect of the present invention provides a heating method for a cigarette cartridge using electromagnetic induction heating, comprising the following steps:

[0027] S1. When the user inhales, the control circuit board (4) determines the smoking temperature of the plant particles by identifying the metal paramagnetic point (21), thereby determining the heating temperature of the electromagnetic induction heater (14). Then, it sends a control signal to connect several electromagnetic induction coils in the electromagnetic induction heater (14) to the power supply, generating an alternating magnetic field under the action of alternating current. The upper metal heating plate (112) and the lower metal heating plate (122) generate eddy currents by cutting the alternating magnetic field lines, thereby causing heating. At the same time, the metal powder in the plant smoking particles (13) also generates eddy currents and heats up, and the plant particles are heated and atomized. The upper temperature sensor (111) and the lower temperature sensor (121) measure the temperature of the smoking section and send the measured temperature signal to the control circuit board (4).

[0028] S2. When the temperature of the smoke-generating section measured by the upper temperature sensor (111) exceeds its set threshold, the power supply of the electromagnetic induction coil near the upper part (11) is cut off, and the electromagnetic induction coil near the upper part (11) stops working.

[0029] When the temperature sensor (121) measures that the temperature of the smoke-generating section exceeds its set threshold, the power supply to the electromagnetic induction coil near the lower part (12) is cut off, and the electromagnetic induction coil near the lower part (12) stops working.

[0030] S3. When the temperature of the smoke-generating section measured by the upper temperature sensor (111) is lower than its set threshold, the upper electromagnetic induction coil (141) and the lower electromagnetic induction coil (142) are connected to the power supply, and the heating operation of steps S1 to S2 is repeated.

[0031] Preferably, the threshold value set in steps S2 to S3 is 260 to 340°C.

[0032] In another aspect, the present invention provides a smoking device comprising a cartridge heated by electromagnetic induction as described in any of the preceding claims.

[0033] The present invention can achieve at least one of the following beneficial effects:

[0034] The e-cigarette cartridge and its heating method provided by this invention are highly energy-efficient, heat up quickly and with high precision. They can automatically match the electromagnetic induction heaters with different varieties and flavors of plant-based smoke particles in the smoke generation section, and can reach the optimal working temperature in a short time. The temperature control effect is good, the smoke is produced quickly and the atomization quality is high.

[0035] This invention allows for clearer and more accurate control of the heating temperature of plant-based smoke particles at different stages. The electromagnetic induction heater is configured with at least two parts, divided into multiple temperature zones for heating. These zones can be heated sequentially or randomly. Temperature sensors are installed at the upper and lower parts of the smoke-generating section in the cartridge, independently turning on or off different electromagnetic induction coils in the electromagnetic induction heater. This adjusts the temperature of the plant-based smoke particles for atomization across multiple temperature zones, lowering the heating temperature and improving energy efficiency. When the temperature reaches the set maximum temperature, the lower electromagnetic induction heater also shuts off, ultimately controlling the plant-based smoke particles at the optimal atomization stage. This ensures comprehensive heating and atomization of the plant-based smoke particles, as well as controllable, staged heating, further improving the atomization quality and energy efficiency. Plant-based smoke pellets are made from a mixture of plant particles and metal powder. Both the metal powder and the metal heating element participate in the electromagnetic induction heating process. During use, the electromagnetic induction coil in the heater generates an alternating magnetic field under the influence of an alternating current. The metal heating element generates eddy currents by cutting the alternating magnetic lines of force, thus heating the pellets. Simultaneously, the metal powder in the plant-based smoke pellets also generates eddy currents and heats up, causing the plant particles to atomize. The metal powder also acts as a heat transfer agent, transferring the heat generated by electromagnetic induction to the nearby plant particles. This results in more uniform heating of the plant particles, which helps to lower the atomization temperature and reduce atomization time. The combined effect of the metal powder and the metal heating element significantly increases and makes the heated area of ​​the plant particles more uniform, resulting in rapid heating and more thorough heating of the plant particles. This allows for faster smoke generation at lower temperatures, achieving rapid smoke production with high energy efficiency.

[0036] The plant-based granules of this invention can be atomized and smoked at a lower temperature, far below the smoke generation temperature of existing electromagnetic induction heating cartridges. Furthermore, the temperature is controllable, ensuring the cartridge is used at the optimal temperature, thus improving the atomization quality of the plant-based granules and enhancing the user experience. In addition, the smoke generated by this invention has a lower temperature, eliminating the need for an additional cooling stage before the smoke is inhaled, allowing for faster cooling and ensuring a better user experience. Attached Figure Description

[0037] Figure 1 A schematic diagram of a cigarette cartridge heated by electromagnetic induction is provided for a preferred embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the structure of a smoking device having the electromagnetically heated cartridge provided in a preferred embodiment of the present invention;

[0039] Explanation of reference numerals in the attached diagram: 1-Smoke-generating section, 2-Cooling section, 3-Filtering section, 4-Control circuit board, 5-Smoke rod, 11-Upper part, 12-Lower part, 13-Plant smoke-generating particles, 14-Electromagnetic induction heater, 15-Heat insulation tube, 111-Upper temperature sensor, 112-Upper metal heating element, 121-Lower temperature sensor, 122-Lower metal heating element, 141-Upper electromagnetic induction coil, 142-Lower electromagnetic induction coil, 21-Parmagnetic point, 22-Through hole. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] like Figure 1 As shown, a preferred embodiment of the present invention provides a cigarette cartridge heated by electromagnetic induction, comprising a smoke-generating section 1, a cooling section 2, and a filter section arranged sequentially upwards along the axial direction, and also includes a control circuit board 4. Wherein:

[0042] The cooling section 2 has multiple paramagnetic points 21;

[0043] The smoke-generating section 1 includes an upper part 11, a lower part 12, plant smoke-generating particles 13, and an electromagnetic induction heater 14. The electromagnetic induction heater 14 includes at least two sets of electromagnetic induction coils. The upper part 11 and the lower part 12 are located at the top and bottom of the electromagnetic induction heater 14, respectively. The outer wall of the smoke-generating section 1 is provided with a heat insulation pipe 15. The electromagnetic induction heater 14 is arranged around the heat insulation pipe 15 and is divided into at least two sets of electromagnetic induction coils along the length of the heat insulation pipe 15. These are an upper electromagnetic induction coil 141 near the upper part 11, a lower electromagnetic induction coil 142 near the lower part 12, and N electromagnetic induction coils located in the middle. The magnetic induction coil includes a first electromagnetic induction coil, a second electromagnetic induction coil, ..., an Nth electromagnetic induction coil (not shown in the figure) arranged sequentially from the upper part 11 to the lower part 12, where N is an integer ≥ 0. When N = 0, the electromagnetic induction heater 14 is only divided into an upper electromagnetic induction coil 141 and a lower electromagnetic induction coil 142. To ensure the smoking experience of the smoking device, air holes are provided on both the upper part 11 and the lower part 12 to allow smoke and air to pass through, respectively. The electromagnetic induction heater is set into at least two parts and divided into multiple temperature zones for heating, which can more accurately control the temperature of the plant smoke particles, thereby improving the atomization effect.

[0044] The upper part 11 is provided with an upper temperature sensor 111 and an upper metal heating element 112. The temperature sensing surface of the upper temperature sensor 111 passes through the upper part 11 and faces into the smoke-generating section 1. The lower part 12 is provided with a lower temperature sensor 121 and a lower metal heating element 122. The temperature sensing surface of the lower temperature sensor 121 passes through the lower part 12 and faces into the smoke-generating section 1. The upper temperature sensor 111 and the lower temperature sensor 121 are used to measure the temperature inside the smoke-generating section 1. The upper metal heating element 112 and the lower metal heating element 122 are both located at the axial position of the smoke-generating section 1 and extend into the plant smoke-generating particles 13.

[0045] The upper temperature sensor 111, the lower temperature sensor 121, the upper electromagnetic induction coil 141, the lower electromagnetic induction coil 142, the first electromagnetic induction coil, the second electromagnetic induction coil, ..., the Nth electromagnetic induction coil are all connected to the control circuit board 4. The control circuit board 4 is used to receive the temperature signals sent by the upper temperature sensor 111 and the lower temperature sensor 121, and to send control signals to the upper electromagnetic induction coil 141, the lower electromagnetic induction coil 142, the first electromagnetic induction coil, the second electromagnetic induction coil, ..., the Nth electromagnetic induction coil according to the temperature signals, so that the different groups of electromagnetic induction coils can be independently connected or disconnected from the power supply.

[0046] The plant-based smoking granules 13 are made from a mixture of plant granules and metal powder, with a volume ratio of plant granules to metal powder of 2-10:1. When the upper and lower electromagnetic induction coils are connected to a power source, the metal powder in the plant-based smoking granules also generates eddy currents and heats up, causing the plant granules to atomize. The metal powder also acts as a heat transfer agent, transferring the heat generated by electromagnetic induction to the plant granules near the metal powder, resulting in more uniform heating of the plant granules, which helps to reduce the atomization temperature and atomization time. The plant granules are obtained by extruding and drying plant flower and leaf powder, binder, and fragrance. The plant-based smoking granules of this invention do not contain tobacco raw materials and do not produce addictive or health-harming substances such as nicotine, achieving the satisfaction of smokers without harming their health.

[0047] The cooling section 2 is used to guide and cool the smoke, and to initially filter the powdery substances in the smoke. The cooling section 2 has multiple paramagnetic points 21, which are connected to the control circuit board 4. The Curie temperature of the paramagnetic points 21 is the smoke generation temperature of the plant particles, and is used by the control circuit board 4 to identify the parameters of the cartridge and control the heating temperature of the electromagnetic induction heater 14. The filtering section 3 is used to filter the powdery substances in the smoke. The other components and their connection and control relationships in the cartridge of this invention are the same as those in existing cartridges.

[0048] This invention allows for clearer and more accurate control of the heating temperature of plant-based smoke particles at different stages. The electromagnetic induction heater is configured with at least two parts, divided into multiple temperature zones for heating. These zones can be heated sequentially or randomly. Temperature sensors are installed at the upper and lower parts of the smoke-generating section in the cartridge, independently turning on or off different electromagnetic induction coils in the electromagnetic induction heater. This adjusts the temperature of the plant-based smoke particles for atomization across multiple temperature zones, lowering the heating temperature and improving energy efficiency. When the temperature reaches the set maximum temperature, the lower electromagnetic induction heater also shuts off, ultimately controlling the plant-based smoke particles at the optimal atomization stage. This ensures comprehensive heating and atomization of the plant-based smoke particles, as well as controllable, staged heating, further improving the atomization quality and energy efficiency. Plant-based smoke pellets are made from a mixture of plant particles and metal powder. Both the metal powder and the metal heating element participate in the electromagnetic induction heating process. During use, the electromagnetic induction coil in the heater generates an alternating magnetic field under the influence of an alternating current. The metal heating element generates eddy currents by cutting the alternating magnetic lines of force, thus heating the pellets. Simultaneously, the metal powder in the plant-based smoke pellets also generates eddy currents and heats up, causing the plant particles to atomize. The metal powder also acts as a heat transfer agent, transferring the heat generated by electromagnetic induction to the nearby plant particles. This results in more uniform heating of the plant particles, which helps to lower the atomization temperature and reduce atomization time. The combined effect of the metal powder and the metal heating element significantly increases and makes the heated area of ​​the plant particles more uniform, resulting in rapid heating and more thorough heating of the plant particles. This allows for faster smoke generation at lower temperatures, achieving rapid smoke production with high energy efficiency.

[0049] In this embodiment, the connection between the upper temperature sensor 111 and the upper part 11 is sealed, and the connection between the lower temperature sensor 121 and the lower part 12 is sealed, resulting in more accurate temperature measurements. Preferably, the upper part 11 is a metal cap, which provides initial cooling for the rising smoke.

[0050] In this embodiment, the heating element 112 is flat, curled, spiral, or multi-piece structure. The heating element shape provided by this invention has a larger surface area, resulting in a larger contact area between the heating element and the plant smoke particles, which allows for more thorough and uniform heating of the tobacco cartridge and a more stable aroma. The metal heating element 112 is made of one or more of iron, nickel, molybdenum, chromium, and tungsten, all commonly used metal materials with superior magnetic permeability and resistivity, resulting in good heating performance.

[0051] In this embodiment, the method for preparing plant smoke particles 13 is as follows:

[0052] a. Remove dust and disinfect the plant flowers and leaves, then crush them into powder and pass them through a 100-300 mesh sieve; specifically: first coarsely crush them into powder that can pass through a 30-70 mesh sieve, then finely crush them into powder that can pass through a 100-300 mesh sieve.

[0053] b. Mix the obtained powder with binder and fragrance, extrude it into shape, and dry it to obtain plant granules;

[0054] c. Mix the obtained plant particles with the metal powder evenly to obtain plant smoke particles 13.

[0055] The method for preparing plant-based smoke particles provided by this invention is relatively simple. The plant flowers and leaves are pulverized twice, first coarsely and then finely, which can improve the pulverization efficiency. By controlling the particle size of the plant flower and leaf powder, it is beneficial to better and more uniformly heat the powder during the electromagnetic induction heating process, thereby improving the atomization effect.

[0056] The plant-based smoke particles (13) have a particle size of 18–100 mesh, while the metal powder has a particle size distribution of 60–70% of 500–600 micrometers and at least 90% of 800 micrometers and below. The moderate particle size of the plant-based smoke particles facilitates thorough atomization and smoke generation upon heating. The metal powder, with its diverse particle sizes and regular distribution, effectively fills the spaces between the plant particles, resulting in better heating and heat transfer, more uniform heating of the plant particles, and higher atomization quality. The metal powder includes one or more of iron oxide, titanium oxide, manganese oxide, cerium oxide, and zirconium oxide. These materials are readily available and all are paramagnetic metal compounds, exhibiting good electromagnetic induction heating effects.

[0057] In this embodiment, the cooling section 2 has a gear-shaped cross-section and several through holes 22 in the middle, which not only guides the flow but also filters the powdery substances in the smoke in the initial stage. In addition, it also cools the smoke to a certain extent. The filter section 3 is filter cotton, which further filters the powdery substances in the smoke and improves the user experience.

[0058] like Figure 2 As shown, by assembling the tobacco cartridge provided in the preferred embodiment of the present invention with the cigarette holder 5, a novel electronic cigarette utilizing electromagnetic induction heating is obtained. The electromagnetic induction heater 14 and the control circuit board 4 can be mounted on the cigarette holder 5 for easy replacement of the plant-based smoke-generating particles inside the tobacco cartridge.

[0059] A preferred embodiment of the present invention also provides a heating method for a cigarette cartridge using electromagnetic induction heating, comprising the following steps:

[0060] S1. When the user inhales, the control circuit board 4 determines the smoke-generating temperature of the plant particles by identifying the paramagnetic metal point 21, thereby determining the heating temperature of the electromagnetic induction heater 14. Then, it sends a control signal to connect several electromagnetic induction coils in the electromagnetic induction heater 14 to the power supply (the electromagnetic induction coils in the multi-temperature zone can be connected to the power supply sequentially or randomly). Under the action of alternating current, an alternating magnetic field is generated. The upper metal heating plate 112 and the lower metal heating plate 122 generate eddy currents by cutting the alternating magnetic field lines, thereby causing heating. At the same time, the metal powder in the plant smoke-generating particles 13 also generates eddy currents and heats up. The plant particles are heated and atomized. The upper temperature sensor 111 and the lower temperature sensor 121 measure the temperature of the smoke-generating section and send the measured temperature signal to the control circuit board 4.

[0061] S2. When the temperature sensor 111 measures that the temperature of the smoke-generating section exceeds its set threshold, the power supply to the electromagnetic induction coil near the upper part 11 (relative to the distance from the lower part 12) is cut off, and the electromagnetic induction coil near the upper part 11 stops working.

[0062] When the temperature sensor 121 measures that the temperature of the smoke-generating section exceeds its set threshold, the power supply to the electromagnetic induction coil near the lower part 12 (relative to the distance from the upper part 11) is cut off, and the electromagnetic induction coil near the lower part 12 stops working.

[0063] S3. When the temperature of the smoke-generating section measured by the upper temperature sensor 111 is lower than its set threshold, the upper electromagnetic induction coil 141 and the lower electromagnetic induction coil 142 are connected to the power supply, and the heating operation of steps S1 to S3 is repeated.

[0064] This invention allows for clearer and more accurate control of the heating temperature of plant-based smoke particles at different stages. The electromagnetic induction heater is configured with at least two parts, divided into multiple temperature zones for heating, thus controlling the heating temperature of the tobacco cartridge. Temperature sensors are installed at the upper and lower parts of the smoke-generating section within the cartridge; the upper sensor monitors the real-time heating temperature, and the lower sensor monitors the maximum heating temperature. Different electromagnetic induction coils in the electromagnetic induction heaters are independently turned on or off to adjust the temperature of the plant-based smoke particles for atomization in multiple temperature zones, reducing the heating temperature and thus improving energy efficiency. When the set maximum temperature is reached, the lower electromagnetic induction heater is also turned off, ultimately controlling the plant-based smoke particles at the optimal atomization stage. This ensures comprehensive heating and atomization of the plant-based smoke particles and controllable heating in stages, further improving the atomization quality and energy efficiency. This invention can set different heating temperatures according to the characteristics of different plant-based smoke particles, allowing different varieties and flavors of plant-based smoke particles to automatically match the electromagnetic induction heater in the smoke-generating section.

[0065] In steps S2 to S4, the first set threshold to the (N+2)th set threshold are 260 to 340°C, preferably 280 to 320°C. This invention allows for setting the heating temperature of the electromagnetic induction heater according to different flavors of electronic cigarettes, and the heating temperature is lower than that of existing similar products.

[0066] The plant-based granules of this invention can be atomized and smoked at a lower temperature, far below the smoke generation temperature of existing electromagnetic induction heating cartridges. Furthermore, the temperature is controllable, ensuring the cartridge is used at the optimal temperature, thus improving the atomization quality of the plant-based granules and enhancing the user experience. In addition, the smoke generated by this invention has a lower temperature, eliminating the need for an additional cooling stage before the smoke is inhaled, allowing for faster cooling and ensuring a better user experience.

[0067] In summary, the e-cigarette cartridge and its heating method provided by this invention are highly energy-efficient, heat up quickly and with high precision. They can automatically match the electromagnetic induction heater to different flavor smoke-generating sections and reach the optimal working temperature in a short time. They also have good temperature control, produce smoke rapidly, and have high atomization quality.

[0068] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cigarette cartridge heated by electromagnetic induction, characterized in that, It includes a smoke-generating section (1), a cooling section (2), a filtering section (3) arranged sequentially upward along the axial direction, and a control circuit board (4); The smoke-generating section (1) includes an upper part (11), a lower part (12), plant smoke-generating particles (13), and an electromagnetic induction heater (14). The electromagnetic induction heater (14) includes at least two sets of electromagnetic induction coils. The upper part (11) and the lower part (12) are located at the top and bottom of the electromagnetic induction heater (14), respectively. The outer wall of the smoke-generating section (1) is provided with a heat insulation pipe (15). The electromagnetic induction heater (14) is arranged around the heat insulation pipe (15) and is divided into at least two sets of electromagnetic induction coils along the length of the heat insulation pipe (15). The upper electromagnetic induction coil (141) is located near the upper part (11), the lower electromagnetic induction coil (142) is located near the lower part (12), and N electromagnetic induction coils are located in the middle. The N electromagnetic induction coils located in the middle include the first electromagnetic induction coil, the second electromagnetic induction coil, ..., the Nth electromagnetic induction coil arranged in sequence from the upper part (11) to the lower part (12), where N is an integer ≥ 0. When N = 0, the electromagnetic induction heater (14) is only divided into the upper electromagnetic induction coil (141) and the lower electromagnetic induction coil (142). The upper part (11) is provided with an upper temperature sensor (111) and an upper metal heating element (112). The temperature sensing surface of the upper temperature sensor (111) passes through the upper part (11) and faces into the smoke-generating section (1). The lower part (12) is provided with a lower temperature sensor (121) and a lower metal heating element (122). The temperature sensing surface of the lower temperature sensor (121) passes through the lower part (12) and faces into the smoke-generating section (1). The upper temperature sensor (111) and the lower temperature sensor (121) are used to measure the temperature inside the smoke-generating section (1). The upper metal heating element (112) and the lower metal heating element (122) are both located at the axial position of the smoke-generating section (1) and extend into the plant smoke-generating particles (13). The upper temperature sensor (111), lower temperature sensor (121), upper electromagnetic induction coil (141), lower electromagnetic induction coil (142), first electromagnetic induction coil, second electromagnetic induction coil, ..., Nth electromagnetic induction coil are all connected to the control circuit board (4). The control circuit board (4) is used to receive the temperature signals sent by the upper temperature sensor (111) and lower temperature sensor (121), and to send control signals to the upper electromagnetic induction coil (141), lower electromagnetic induction coil (142), first electromagnetic induction coil, second electromagnetic induction coil, ..., Nth electromagnetic induction coil according to the temperature signals, so that the different groups of electromagnetic induction coils can be connected or disconnected from the power supply independently. The plant-smoking particles (13) are made by mixing plant particles and metal powder, with a volume ratio of plant particles to metal powder of 2 to 10:1; the plant particles are obtained by extruding plant flower and leaf powder, binder and fragrance and then drying. The cooling section (2) is used to guide and cool the smoke and to initially filter the powdery substances in the smoke. The cooling section (2) has multiple metal paramagnetic points (21). The metal paramagnetic points (21) are connected to the control circuit board (4). The Curie temperature of the metal paramagnetic points (21) is the smoke-generating temperature of the plant particles. The control circuit board (4) identifies the smoke cartridge parameters and controls the heating temperature of the electromagnetic induction heater (14). The filtering section (3) is used to filter the powdery substances in the smoke.

2. A cigarette cartridge heated by electromagnetic induction according to claim 1, characterized in that, The metal heating element (112) has a straight, curled, spiral or multi-piece structure.

3. A cigarette cartridge heated by electromagnetic induction according to claim 1, characterized in that, The metal heating element (112) is made of one or more of the following materials: iron, nickel, molybdenum, chromium, and tungsten.

4. A cigarette cartridge heated by electromagnetic induction according to claim 1, characterized in that, The preparation method of the plant-based smoky granules (13) is as follows: a. Remove dust and disinfect the plant flowers and leaves, then crush them into powder and pass them through a 100-300 mesh sieve; b. Mix the obtained powder with binder and fragrance, extrude it into shape, and dry it to obtain plant granules; c. Mix the obtained plant particles with the metal powder evenly to obtain plant smoke particles (13).

5. A cigarette cartridge heated by electromagnetic induction according to claim 4, characterized in that, The specific pulverization process described in step a is as follows: first, coarsely pulverize the powder into a powder that can pass through a 30-70 mesh sieve, and then finely pulverize it into a powder that can pass through a 100-300 mesh sieve.

6. A cigarette cartridge heated by electromagnetic induction according to claim 1, characterized in that, The particle size of the plant fuming particles (13) is 18-100 mesh, and the particle size distribution of the metal powder is 60-70% of 500-600 micrometers, and at least 90% of 800 micrometers and below.

7. A cigarette cartridge heated by electromagnetic induction according to claim 1, characterized in that, The metal powder includes one or more of iron oxide, titanium oxide, manganese oxide, cerium oxide, and zirconium oxide.

8. A heating method for a cigarette cartridge using electromagnetic induction heating according to any one of claims 1 to 7, characterized in that, Includes the following steps: S1. When the user inhales, the control circuit board (4) determines the smoke temperature of the plant particles by identifying the metal paramagnetic point (21), thereby determining the heating temperature of the electromagnetic induction heater (14). Then, it sends a control signal to connect several electromagnetic induction coils in the electromagnetic induction heater (14) to the power supply, generating an alternating magnetic field under the action of alternating current. The upper metal heating plate (112) and the lower metal heating plate (122) generate eddy currents by cutting the alternating magnetic field lines, thereby causing heating. At the same time, the metal powder in the plant smoke particles (13) also generates eddy currents and heats up, and the plant particles are atomized by heating. The upper temperature sensor (111) and the lower temperature sensor (121) measure the temperature of the smoke section and send the measured temperature signal to the control circuit board (4). S2. When the temperature of the smoke-generating section measured by the upper temperature sensor (111) exceeds its set threshold, the power supply of the electromagnetic induction coil near the upper part (11) is cut off, and the electromagnetic induction coil near the upper part (11) stops working. When the temperature sensor (121) measures the temperature of the smoke-generating section and exceeds its set threshold, the power supply to the electromagnetic induction coil near the lower part (12) is cut off, and the electromagnetic induction coil near the lower part (12) stops working. S3. When the temperature of the smoke-generating section measured by the upper temperature sensor (111) is lower than its set threshold, the upper electromagnetic induction coil (141) and the lower electromagnetic induction coil (142) are connected to the power supply, and the heating operation of steps S1 to S3 is repeated.

9. A heating method for a cigarette cartridge using electromagnetic induction heating according to claim 8, characterized in that, The threshold value set in steps S2 to S3 is 260 to 340°C.

10. An electronic cigarette, characterized in that, Includes the smoke cartridge heated by electromagnetic induction as described in any one of claims 1 to 7.

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