Induction heating cigarette heating device and using method thereof

Abstract

The invention discloses an induction heating cigarette heating device and a using method thereof, and belongs to the technical field of smoking sets for heating cigarettes, the induction heating cigarette heating device comprises a thin-wall hollow supporting piece arranged in the middle of a cigarette, an energy emitting element capable of being inserted into the thin-wall hollow supporting piece, a temperature sensing module integrated on the energy emitting element and a control module in communication connection with the temperature sensing module; the energy emitting element emits electromagnetic waves or radiation energy to the thin-wall hollow supporting piece, so that the thin-wall hollow supporting piece emits heat and indirectly heats surrounding tobacco; the temperature sensing module monitors relevant temperature parameters of the thin-wall hollow supporting piece in real time, and the control module dynamically adjusts output of the energy emitting element according to the relevant temperature parameters. By means of the internal non-contact heating mode, the heat transfer path is shortened, the heating efficiency and the temperature control precision are remarkably improved, uniform heating of cigarettes is achieved, and meanwhile the problems of heating residues and odor tainting are effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of smoking accessories for heating cigarettes, and specifically to an induction heating cigarette heating device and its usage method. Background Technology

[0002] Heated cigarettes release the aroma components in the cigarette by heating rather than burning the tobacco material, forming an aerosol for the user to inhale. This reduces the harmful substances produced by traditionally burning cigarettes. To achieve this heating, a heating device is usually used in conjunction with the cigarette.

[0003] In existing technologies, there are induction-heated smoking devices. These devices contain an induction coil as a source to generate an alternating electromagnetic field, and an induction element is embedded in the cigarette. This induction element is typically made of a metal material that can be heated by electromagnetic induction, such as a ferromagnetic alloy. When the cigarette is inserted into the device, the alternating electromagnetic field generated by the induction coil heats the induction element. The induction element then comes into direct contact with the tobacco material, generating heat to heat the tobacco material and release aerosols. However, this method has certain technical problems:

[0004] First, the heat transfer path in the above scheme is long and inefficient. Induction heating requires generating an electromagnetic field outside the device to excite the sensing element inside the cigarette to heat up. The heat is then conducted from the sensing element to the tobacco. The heating device and the sensing element are separated by a certain distance. Moreover, this energy transfer path involves multiple stages of conversion and conduction between the electromagnetic field, the sensing element, and the tobacco, resulting in unavoidable energy loss. This leads to low overall heating efficiency and high energy consumption. In addition, the heating device is usually only close to one end of the cigarette. Since the sensing element is placed inside the cigarette, it is inevitable that one end will be close to the heating device and the other end will be far away from the heating device. This will cause the sensing element to not heat evenly during the induction heating process, thus affecting the cigarette's smoking effect. Secondly, the temperature control accuracy and heating uniformity of existing heated tobacco devices are not good. They rely on monitoring the temperature of the sensing element. Heating stops when the temperature of the sensing element reaches the set temperature and restarts when the temperature drops. This results in a large fluctuation in the actual working temperature around the set temperature, making it difficult to achieve precise constant temperature control. At the same time, the sensing element is usually set as a sheet-like embedded structure, and its heating area is relatively fixed and concentrated. It is difficult to achieve uniform and gradient heating of the entire tobacco segment in the axial and circumferential directions, which can easily cause local overheating or underheating, affecting the stability of aerosol quality. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention provides an induction heating cigarette heating device and its usage method, which shortens the heating transmission path, improves heating efficiency and temperature control accuracy, achieves uniform heating of the cigarette, and avoids residue and cross-contamination of flavors.

[0006] The technical solution of the present invention is as follows: In a first aspect of the present invention, an induction heating cigarette heating device is provided, comprising: A thin-walled hollow support member, which extends axially and is disposed in the middle of the cigarette stick, and is made of a material capable of absorbing electromagnetic waves or radiation energy and converting it into heat; An energy emitting element is configured to be inserted into the hollow interior of the thin-walled hollow support member, and the energy emitting element is used to emit electromagnetic waves or radiation energy into the thin-walled hollow support member; A temperature sensing module is disposed on the energy emitting element and is used to sense parameters related to the temperature of the thin-walled hollow support. A control module is communicatively connected to the energy emitting element and the temperature sensing module. The control module is configured to adjust the output of the energy emitting element according to the parameters sensed by the temperature sensing module, so as to control the heating temperature of the thin-walled hollow support.

[0007] In some embodiments of the present invention, the thin-walled hollow support is configured as a hollow cylindrical structure, the thin-walled hollow support has a plurality of through holes, and the wall thickness of the thin-walled hollow support is set between 0.02 mm and 1 mm.

[0008] In some embodiments of the present invention, the material of the thin-walled hollow support is at least one of ceramic, metal, carbon fiber composite material or ceramic composite material; the electromagnetic wave or radiation energy emitted by the energy emitting element is at least one of microwave, infrared or electromagnetic field of a specific frequency.

[0009] In some embodiments of the present invention, the temperature sensing module includes a temperature sensing circuit printed on the surface of the energy emitting element substrate, the temperature sensing circuit being formed by metal paste printing.

[0010] In some embodiments of the present invention, the temperature sensing module includes a plurality of temperature sensors disposed inside a thin-walled hollow support member. The plurality of temperature sensors are evenly distributed along the axial direction of the thin-walled hollow support member. The plurality of temperature sensors are communicatively connected to a control module. The temperature sensors are configured as thermistors or thermocouples.

[0011] In some embodiments of the present invention, the energy emitting element is divided into multiple independent energy emitting segments along its axial direction, and the temperature sensing module is provided with multiple independent temperature sensing zones corresponding to the multiple independent energy emitting segments. The control module can independently adjust the output of each energy emitting segment and realize axial zone temperature control based on the feedback of the corresponding temperature sensing zone.

[0012] In some embodiments of the present invention, the control module sets different target temperature thresholds for different temperature sensing zones.

[0013] In some embodiments of the present invention, a gap is provided between the outer surface of the energy emitting element and the inner surface of the thin-walled hollow support.

[0014] In some embodiments of the present invention, the control module employs a closed-loop control algorithm to continuously adjust the output power of the energy emitting element based on the real-time feedback from the temperature sensing module.

[0015] In a second aspect of the invention, a method of using an induction-heated cigarette heating device is provided, comprising: The energy emitting element is inserted into the hollow portion of a cigarette containing the thin-walled hollow support. The energy emitting element is activated, causing it to emit electromagnetic waves or radiation energy toward the thin-walled hollow support. The temperature sensing module senses temperature-related parameters of the thin-walled hollow support component in real time. The control module determines the current heating state based on the mapping relationship between the sensed parameters and the preset target temperature threshold, and obtains the determination result. The control module dynamically adjusts the output of the energy emitting element based on the judgment result, so that the temperature of the thin-walled hollow support reaches and is maintained within the set temperature range.

[0016] One or more technical solutions of the present invention have the following beneficial effects: By placing a thin-walled hollow support in the middle of the cigarette as the core heating element, and having an energy emitting element directly inserted into it to emit energy, the shortest heat transfer path is constructed, which diffuses radially from the center of the tobacco to the surrounding areas. This greatly reduces the multi-stage conversion and loss of energy in the transfer medium, resulting in a fundamental improvement in heating efficiency and energy utilization.

[0017] By integrating a temperature sensing module into the energy emission element to monitor the heating status in real time and directly, and by using a control module to continuously and accurately adjust the power based on a closed-loop control algorithm, not only is stable and high-precision constant temperature control achieved, avoiding large temperature fluctuations, but also a temperature gradient that meets expectations can be formed and maintained on the thin-walled hollow support through an axial partition control strategy. This ensures that the heating height is uniform in both the axial and circumferential directions of the entire tobacco section, effectively improving the stability of aerosol quality.

[0018] A physical gap is provided between the energy emitting element and the thin-walled hollow support, which enables completely non-contact heating. This fundamentally avoids the adhesion of tobacco residue to the heating element, making cleaning and maintenance extremely simple. It also completely eliminates the problem of flavor mixing when using different flavored cigarettes alternately, ensuring a pure and convenient smoking experience. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the cigarette heating device provided in Embodiment 1 of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the cigarette heating device provided in Embodiment 1 of the present invention. Figure 2 .

[0020] In the diagram: 1. Cigarette stick; 2. Smoking device body; 3. Clamping structure; 4. Thin-walled hollow support component; 5. Energy emitting element; 6. Control module; 7. Battery; 8. Charging interface; 9. Temperature sensor. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Example 1 In a typical embodiment of the present invention, such as Figure 1 As shown, an induction heating cigarette heating device is proposed, comprising: Thin-walled hollow support 4 is axially extended and disposed in the middle of the cigarette stick 1. The thin-walled hollow support 4 is made of a material that can absorb electromagnetic waves or radiation energy and convert it into heat. Energy emitting element 5 is configured to be inserted into the hollow interior of thin-walled hollow support 4. Energy emitting element 5 is used to emit electromagnetic waves or radiation energy into thin-walled hollow support 4. Temperature sensing module, which is set on energy emitting element 5, is used to sense parameters related to the temperature of thin-walled hollow support 4; The control module 6 is communicatively connected to the energy emitting element 5 and the temperature sensing module. The control module 6 is configured to adjust the output of the energy emitting element 5 according to the parameters sensed by the temperature sensing module in order to control the heating temperature of the thin-walled hollow support 4.

[0023] In this embodiment, the heating device also includes a smoking device body 2, which has a control module 6 inside. The tail of the smoking device body 2 is provided with a rechargeable battery 7 and a charging interface 8. The head end of the smoking device body 2 is provided with a cigarette insertion cavity structure. At the end of the cigarette insertion cavity structure, there is a clamping structure 3 for clamping the cigarette 1 inserted into the cavity structure. The tobacco section of the cigarette 1 is provided with a thin-walled hollow support member 4. The cigarette insertion cavity structure is provided with an energy emitting element 5. The energy emitting element 5 is configured as a hollow needle structure and can be inserted into the thin-walled hollow support member 4 with a certain gap.

[0024] By incorporating a thin-walled hollow support 4 extending axially into the middle of the cigarette stick 1, not only is the tobacco material within the cigarette stick 1 supported, but the thin-walled hollow support 4 itself is designed as a heating element capable of absorbing specific energy and converting it into heat. The energy emitting element 5 is configured to be inserted into the hollow interior of the thin-walled hollow support 4, allowing electromagnetic waves or radiation energy to directly act on the thin-walled hollow support 4 from within the tobacco segment for heating. This achieves radially uniform diffusion of heat from the center to the surrounding tobacco material. This design significantly shortens the lengthy energy transfer path from the external smoking device to the internal tobacco in traditional heating methods, effectively reducing energy loss caused by multi-stage energy conversion and dielectric thermal resistance, thereby significantly improving overall heating efficiency and energy utilization.

[0025] Meanwhile, a temperature sensing module is integrated on the energy emission element 5 and forms a communication connection with the control module 6, forming a complete monitoring and control loop. This makes the perception of the temperature status of the core heat source, namely the thin-walled hollow support 4, more direct, and the generation and execution of control commands more rapid. This provides a solid hardware foundation for achieving high-precision and high-stability dynamic temperature control, and ultimately ensures the excellent and stable quality of aerosol generation.

[0026] The thin-walled hollow support 4 is configured as a hollow cylindrical structure with several through holes. The wall thickness of the thin-walled hollow support 4 is set between 0.02mm and 1mm.

[0027] The thin-walled hollow support 4 is designed as a hollow cylindrical structure, which allows it to form a maximum circumferential contact area with the tobacco material filled around it. This facilitates the uniform and efficient conduction of heat from the surface of the thin-walled hollow support 4 to the tobacco in all directions, effectively improving the uniformity of heating.

[0028] Several through holes are set on the support to optimize the flow channel of aerosol, so that the aroma components released by the tobacco material when heated can be collected and transported more smoothly through the through holes, improving the fluidity and release efficiency of the smoke and enhancing the user experience.

[0029] By limiting the wall thickness of the thin-walled hollow support 4 within a specific range, an optimal balance between thermal response characteristics and energy absorption efficiency is achieved. The extremely thin wall thickness results in the thin-walled hollow support 4 having an extremely low heat capacity, enabling extremely rapid temperature rise upon energy input, minimizing user waiting time, and achieving rapid start-up heating. Furthermore, this optimized wall thickness range ensures that incident electromagnetic waves or radiation can be absorbed by the thin-walled hollow support 4 with extremely high efficiency and converted into heat energy, minimizing energy reflection or transmission losses.

[0030] The material of the thin-walled hollow support 4 is at least one of ceramic, metal, carbon fiber composite material or ceramic composite material; the electromagnetic wave or radiation energy emitted by the energy emitting element 5 is at least one of microwave, infrared or electromagnetic field of a specific frequency.

[0031] Understandably, the material selection for the thin-walled hollow support component 4 can be adapted to the specific circumstances, offering high flexibility and room for optimization. Different materials possess varying dielectric properties, thermal conductivity, mechanical strength, and chemical stability. Ceramic materials are heat-resistant and do not readily react with tobacco components, ensuring a pure flavor; composite materials, on the other hand, combine multiple superior properties. This configuration allows the device to select the most suitable material based on different energy types and specific performance requirements, achieving optimal heating effects and cost control.

[0032] In terms of energy type, it is clearly defined as microwave, infrared or electromagnetic field of a specific frequency. This defines the essence of energy transfer as direct field coupling, rather than traditional contact or induction heating that relies on eddy current effects. This direct energy field action makes the process of energy from emission to conversion into heat more direct, pure and efficient.

[0033] The temperature sensing module includes a temperature sensing circuit printed on the surface of the energy emitting element 5 substrate, which is formed by printing with metal paste.

[0034] The metal paste temperature sensing circuit is directly fabricated on the substrate surface of the energy emitting element 5 by screen printing, making the temperature sensing function an integral part of the structure of the energy emitting element 5 itself. This integrated design eliminates the steps of installing, fixing and connecting independent sensor components, resulting in an exceptionally compact and reliable structure. It significantly improves the overall structural stability and production consistency. Furthermore, the heat transfer sensing circuit does not require an intermediate medium, thus providing a rapid temperature response.

[0035] Secondly, the printed temperature sensing circuit can be precisely positioned at key locations on the surface of the energy emitting element 5, especially in areas most sensitive to thermal radiation. This positional precision ensures that the temperature signal sensed by the temperature sensing circuit can most accurately and timely reflect the actual thermal state of the thin-walled hollow support 4, with minimal measurement hysteresis error.

[0036] The temperature sensing module includes multiple temperature sensors 9 disposed inside the thin-walled hollow support 4. The multiple temperature sensors 9 are evenly distributed along the axial direction of the thin-walled hollow support 4. The multiple temperature sensors 9 are communicatively connected to the control module 6. The temperature sensors 9 are configured as thermistors or thermocouples.

[0037] In this embodiment, as Figure 2 As shown, the thin-walled hollow support 4 has a support member inside, which is a column structure arranged along the axial direction of the thin-walled hollow support 4. Multiple temperature sensors 9 are arranged at predetermined intervals along the axial direction of the support member. It can be understood that the temperature sensing module can be adapted to the actual application.

[0038] By setting the temperature sensor 9 as described above, direct in-situ measurement of the temperature of the thin-walled hollow support 4, which serves as the heating element, can be achieved. The temperature sensor 9, such as a thermistor or thermocouple, is directly placed inside the thin-walled hollow support 4 and evenly distributed along its axis. It can sense the true temperature of each local area of ​​the thin-walled hollow support 4 without intermediaries or delays, completely eliminating the modeling or transmission errors that may exist in indirect temperature measurement through the energy emission element 5, and obtaining more accurate temperature data.

[0039] An array of multiple temperature sensors 9 can reveal the complete temperature field distribution along the length of the thin-walled support, enabling the control module 6 to accurately grasp the details of the uniformity of axial heating and promptly detect areas of local overheating or underheating.

[0040] The energy emitting element 5 is divided into multiple independent energy emitting segments along its axis. The temperature sensing module is provided with multiple independent temperature sensing zones for each of the multiple independent energy emitting segments. The control module 6 can independently adjust the output of each energy emitting segment and realize axial zone temperature control based on the feedback of the corresponding temperature sensing zone.

[0041] By dividing the energy emitting element 5 into multiple independently driveable energy emitting segments and equipping each emitting segment with a dedicated temperature sensing zone, the device no longer heats the entire tobacco bar with a single power uniformly, but instead has the ability to perform differentiated heating in the axial direction.

[0042] The control module 6 can independently analyze the feedback signal of each temperature sensing zone and adjust the output power of the corresponding energy emission section accordingly. For example, it can independently set and maintain different power levels to address the differences in heat demand at the front, middle, and rear of the tobacco section. This zoned closed-loop control based on independent feedback can actively compensate for uneven axial heat distribution caused by structure or environment, thereby actively creating and maintaining a preset, stable axial temperature gradient on the thin-walled hollow support 4. This greatly improves the overall uniformity of heating of the long tobacco section, allowing aerosol generation to reach an optimized state at all axial positions, significantly improving the layering and consistency of the vaping experience.

[0043] Control module 6 sets different target temperature thresholds for different temperature sensing zones.

[0044] This configuration sets clear and differentiated optimal operating temperature targets for different axial regions of the tobacco material. The control module 6 drives multiple energy emission sections to work together. Through independent closed-loop regulation, the local temperature of the thin-walled hollow support 4 corresponding to each temperature sensing zone approaches and stabilizes at its set target temperature threshold. This allows various volatile aroma components in the tobacco to be selectively and efficiently released within the most suitable temperature range according to their release characteristics, resulting in a richer and smoother smoke flavor and minimizing unpleasant aromas caused by improper local temperatures.

[0045] In this embodiment, during the process of receiving the temperature signal from the printed temperature sensing circuit, the temperature sensing circuit monitors the abnormal temperature rise of the thin-walled hollow support 4, which serves as the heating element. When the temperature exceeds the safety threshold (e.g., 400°C), the control module 6 will trigger an alarm, such as setting the LED to flash and stopping heating to avoid a safety accident.

[0046] A gap is provided between the outer surface of the energy emitting element 5 and the inner surface of the thin-walled hollow support 4.

[0047] This design ensures that there is no physical contact between the energy emitting element 5 and the consumable cigarette stick 1, fundamentally solving the problem of cigarette stick residue sticking to the heating element of the smoking device after heating. It achieves complete separation after use, making the cleaning and maintenance of the smoking device extremely simple, and completely eliminating the problem of flavor mixing that may occur when different flavored cigarette sticks 1 are used continuously, ensuring the purity of flavor for each use.

[0048] Secondly, the gap provides a spatial basis for the transfer of energy in the form of electromagnetic waves or radiation energy, allowing the energy field to be established in this space and coupled to the thin-walled hollow support 4. In addition, the size of the gap itself can be adaptively set according to the actual situation, thereby optimizing the coupling efficiency of the electromagnetic field and the uniformity of heating at a specific frequency, and realizing fine-tuning of heating performance.

[0049] The control module 6 adopts a closed-loop control algorithm to continuously adjust the output power of the energy emission element 5 based on the real-time feedback from the temperature sensing module.

[0050] This configuration enables real-time management of the heating process. Unlike traditional simple two-position switch control, the closed-loop control algorithm continuously receives real-time feedback signals from the temperature sensing module and adjusts the output power of the energy emitting element 5 continuously and linearly through preset control logic. This control method allows the temperature of the thin-walled hollow support 4 to be controlled within a very narrow fluctuation range around the target value, avoiding large periodic temperature fluctuations caused by start-stop control. This not only reduces ineffective energy consumption and improves energy efficiency, but more importantly, it provides a continuous and stable thermal environment for the tobacco material, ensuring that the aerosol release rate in the tobacco remains constant. This guarantees that the aerosol concentration, taste, and aroma characteristics remain highly consistent from the first puff to the last.

[0051] In a second aspect of the invention, a method of using an induction-heated cigarette heating device is provided, comprising: The energy emitting element 5 is inserted into the hollow part of the cigarette stick 1 containing the thin-walled hollow support 4; Activate energy emission element 5 to emit electromagnetic waves or radiation energy toward thin-walled hollow support 4; The temperature-related parameters of the thin-walled hollow support 4 are sensed in real time by the temperature sensing module. The control module 6 determines the current heating state based on the mapping relationship between the sensed parameters and the preset target temperature threshold, and obtains the determination result. Based on the judgment result, the control module 6 dynamically adjusts the output of the energy emission element 5 so that the temperature of the thin-walled hollow support 4 reaches and is maintained within the set temperature range.

[0052] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. An induction heating device for cigarettes, characterized in that, include: A thin-walled hollow support member, which extends axially and is disposed in the middle of the cigarette stick, and is made of a material capable of absorbing electromagnetic waves or radiation energy and converting it into heat; An energy emitting element is configured to be inserted into the hollow interior of the thin-walled hollow support member, and the energy emitting element is used to emit electromagnetic waves or radiation energy into the thin-walled hollow support member; A temperature sensing module is disposed on the energy emitting element and is used to sense parameters related to the temperature of the thin-walled hollow support. A control module is communicatively connected to the energy emitting element and the temperature sensing module. The control module is configured to adjust the output of the energy emitting element according to the parameters sensed by the temperature sensing module, so as to control the heating temperature of the thin-walled hollow support.

2. The induction heating cigarette heating device as described in claim 1, characterized in that, The thin-walled hollow support is configured as a hollow cylindrical structure, and has several through holes. The wall thickness of the thin-walled hollow support is set between 0.02mm and 1mm.

3. The induction heating cigarette heating device as described in claim 1, characterized in that, The material of the thin-walled hollow support is at least one of ceramic, metal, carbon fiber composite material or ceramic composite material; the electromagnetic wave or radiation energy emitted by the energy emitting element is at least one of microwave, infrared or electromagnetic field of a specific frequency.

4. The induction heating cigarette heating device as described in claim 1, characterized in that, The temperature sensing module includes a temperature sensing circuit printed on the surface of the energy emitting element substrate, the temperature sensing circuit being formed by printing with metal paste.

5. The induction heating cigarette heating device as described in claim 1, characterized in that, The temperature sensing module includes multiple temperature sensors disposed inside the thin-walled hollow support member. The multiple temperature sensors are evenly distributed along the axial direction of the thin-walled hollow support member. The multiple temperature sensors are communicatively connected to the control module. The temperature sensors are configured as thermistors or thermocouples.

6. The induction heating cigarette heating device as described in claim 1, characterized in that, The energy emitting element is divided into multiple independent energy emitting segments along its axial direction. The temperature sensing module is provided with multiple independent temperature sensing zones for each of the multiple independent energy emitting segments. The control module can independently adjust the output of each energy emitting segment and realize axial zone temperature control based on the feedback of the corresponding temperature sensing zone.

7. The induction heating cigarette heating device as described in claim 6, characterized in that, The control module sets different target temperature thresholds for different temperature sensing zones.

8. The induction heating cigarette heating device as described in claim 1, characterized in that, A gap is provided between the outer surface of the energy emitting element and the inner surface of the thin-walled hollow support.

9. The induction heating cigarette heating device as described in claim 1, characterized in that, The control module employs a closed-loop control algorithm to continuously adjust the output power of the energy emitting element based on real-time feedback from the temperature sensing module.

10. A method of using an induction heating cigarette heating device as described in any one of claims 1-9, characterized in that, include: The energy emitting element is inserted into the hollow portion of a cigarette containing the thin-walled hollow support. The energy emitting element is activated, causing it to emit electromagnetic waves or radiation energy toward the thin-walled hollow support. The temperature sensing module senses temperature-related parameters of the thin-walled hollow support component in real time. The control module determines the current heating state based on the mapping relationship between the sensed parameters and the preset target temperature threshold, and obtains the determination result. The control module dynamically adjusts the output of the energy emitting element based on the judgment result, so that the temperature of the thin-walled hollow support reaches and is maintained within the set temperature range.

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