Induction heating aerosol generating device
By optimizing the design of the induction coil and the induction heating element, the problems of uneven heating and high energy consumption have been solved, resulting in more efficient heating and a better suction experience.
Patent Information
- Application Number
- CN202422780153.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-11-14
AI Technical Summary
In existing electromagnetic heating appliances, the design of the induction coil and the induction heating element leads to uneven heating and high energy consumption, which affects heating efficiency.
By adjusting the length and position of the induction coil and the induction heating element, the induction heating element is positioned in the middle of the induction coil, ensuring that the matching relationship between the induction heating element and the coil meets a specific ratio, thereby achieving more efficient heat conversion.
It improves heating uniformity and reduces energy consumption, providing a better suction experience.
Smart Images
Figure CN223503726U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of novel tobacco technology, and specifically relates to an induction heating aerosol generating device. Background Technology
[0002] In recent years, with people paying increasing attention to health, people have realized that traditional cigarettes have certain health hazards, and the impact of traditional cigarettes on health and the environment has gradually received attention from countries around the world.
[0003] Currently, most cigarette heating devices on the market utilize the principle of resistance heating, with heating methods including inner core heating, outer perimeter heating, and a combination of both. Inner core heating devices, to facilitate cigarette insertion, typically use a needle-type heating element. This element has a small cross-sectional area, causing uneven heating of the cigarette as the tobacco near the heating element is overheated, while the tobacco further away remains poorly heated.
[0004] Electromagnetic induction heating utilizes electromagnetic induction to generate eddy currents within the material being heated, relying on the energy of these eddy currents to achieve heating. The process of electromagnetic induction heating is actually a combination of electromagnetic induction and heat conduction, with electromagnetic induction playing a dominant role and, to a certain extent, determining the heat conduction process. The heat energy required for heat conduction is actually provided by the power of the eddy currents generated during electromagnetic induction. As a non-contact heating method, the induction heating element does not need to be electrically connected to the heating control components, thus offering greater design flexibility and making it highly suitable for applications in the field of novel tobacco products. The key components in the principle of electromagnetic induction heating include an induction transmitter with an induction coil and a sensor that acts as the induction heating element.
[0005] In existing designs, electromagnetic heating appliances typically employ a technique where at least one end of the induction heating element is longer than the induction coil, meaning the induction coil only partially covers the heating element in its axial projected area. This approach utilizes the thermal conductivity of the heating element to drive a larger heating area with fewer coils. The problem is that while the induction coil has low energy consumption per unit length, it requires a longer heating time. Since the boundary cost of driving the induction coil is not linearly distributed, a design where the heating element is longer than the induction coil is not the optimal choice in terms of overall energy consumption and heating efficiency.
[0006] Therefore, in order to improve the thermal conversion efficiency of the device, it is necessary to develop a new type of induction heating aerosol generation device. Summary of the Invention
[0007] To address the aforementioned technical problems in the existing technology, this utility model provides an induction heating aerosol generating device that improves the thermal conversion efficiency of the device.
[0008] The technical solution adopted in this utility model is:
[0009] An induction heating aerosol generating device heats an aerosol generating product by induction heating to produce an aerosol for users to inhale; the aerosol generating device includes:
[0010] A housing that defines a heated chamber for receiving at least a portion of the aerosol-generating article;
[0011] An inductor, which includes an induction coil;
[0012] A power source, connected to the induction coil and configured to provide a high-frequency current to the induction coil, wherein in use the induction coil generates a fluctuating electromagnetic field to heat an induction heating element that is in thermal contact with the aerosol generating article and thereby heats the aerosol generating matrix of the aerosol generating article.
[0013] The induction coil is characterized by having a length of L in the axial direction, the heating element having a length of M in the axial direction, the distance by which the front end of the induction coil extends beyond the front end of the heating element being d1, and the distance by which the rear end of the induction coil extends beyond the rear end of the heating element being d2. The induction coil and the heating element satisfy the following relationship:
[0014] L=M+d1+d2, M / 4≥d1≥M / 12>0, M / 4≥d2≥M / 12>0.
[0015] Furthermore, the distance d1 by which the front end of the induction coil extends beyond the front end of the induction heating element and the distance d2 by which the rear end of the induction coil extends beyond the rear end of the induction heating element satisfy the following relationship: d1≥d2.
[0016] Furthermore, the distance d1 by which the front end of the induction coil extends beyond the front end of the induction heating element and the distance d2 by which the rear end of the induction coil extends beyond the rear end of the induction heating element satisfy the following relationship: d1 = d2.
[0017] Furthermore, the length M of the induction heating element in the axial direction, the distance d1 of the front end of the induction coil extending beyond the front end of the induction heating element, and the distance d2 of the rear end of the induction coil extending beyond the rear end of the induction heating element satisfy the following relationship: d1 = d2 = M / 6.
[0018] Furthermore, the inductive heating element is in thermal contact with the outer surface of the aerosol-generating product.
[0019] Furthermore, the radius r of the induction coil, the distance d1 of the front end of the induction coil extending beyond the front end of the induction heating element, and the distance d2 of the rear end of the induction coil extending beyond the rear end of the induction heating element satisfy the following relationship: r>(d1+d2)>r / 2.
[0020] Furthermore, the inductive heating element and the induction coil are coaxially nested.
[0021] Furthermore, the distance between the outer surface of the induction heating body and the induction coil is at least r / 4.
[0022] Furthermore, a magnetic field concentrator is provided on the outside of the induction coil.
[0023] Furthermore, it also includes a high-temperature resistant fastener, at least one end of the inductive heating element is provided with the high-temperature resistant fastener, the high-temperature resistant fastener is used to fix the inductive heating element and the induction coil relative to each other.
[0024] Among them, aerosol-generating products are smoking products, including aerosol-forming matrix, which generates aerosols through heating that can be directly inhaled into the lungs of the user through the user's mouth.
[0025] Preferably, the aerosol forming matrix is a solid aerosol forming matrix. The aerosol forming matrix may include both solid and liquid components.
[0026] Preferably, the aerosol forming matrix comprises nicotine. In some preferred embodiments, the aerosol forming matrix comprises tobacco. For example, the aerosol forming material may be formed from a sheet of homogeneous tobacco.
[0027] Alternatively or additionally, the aerosol forming matrix may include tobacco-free aerosol forming materials. For example, the aerosol forming material may be a tablet comprising nicotine salts and aerosol forming agents.
[0028] If the aerosol forming matrix is a solid aerosol forming matrix, then the solid aerosol forming matrix may include one or more of the following: powder, granules, pellets, fragments, strips, bars or sheets, and contains one or more of the following: herbaceous plant leaves, tobacco leaves, tobacco ribs, flat tobacco and homogeneous tobacco.
[0029] Preferably, the aerosol forming matrix includes a plug, said plug comprising an aggregate of homogeneous tobacco material or other aerosol forming material surrounded by packaging material.
[0030] In this invention, aerosol forming agent is used to describe any suitable known compound or mixture of compounds that promotes aerosol formation in use and is substantially resistant to thermal degradation at the operating temperature of the aerosol-generated article.
[0031] Suitable aerosol forming agents are known in the art and include, but are not limited to: polyols, such as propylene glycol, triethylene glycol, 1,3-butanediol, and glycerol; esters of polyols, such as glycerol monoacetate, glycerol diacetate, or glycerol triacetate; and aliphatic esters of mono-, di-, or polycarboxylic acids, such as dimethyl dodecanoate and dimethyl tetradecanoate. Preferred aerosol forming agents are polyols or mixtures thereof, such as propylene glycol, triethylene glycol, 1,3-butanediol, and most preferably glycerol.
[0032] The aerosol forming matrix may include a single aerosol forming agent. Alternatively, the aerosol forming matrix may include a combination of two or more aerosol forming agents.
[0033] Preferably, the aerosol forming matrix has an aerosol forming agent content of more than 5% on a dry weight basis. More preferably, the aerosol forming matrix may have an aerosol forming agent content of between about 5% and about 30% on a dry weight basis.
[0034] More preferably, the aerosol forming matrix has an aerosol forming agent content of approximately 20% on a dry weight basis.
[0035] Aerosol forming matrices, including those used to homogenize tobacco sheets in aerosol-generating articles, can be manufactured using existing manufacturing processes in the field, such as rolling, slurry, and papermaking.
[0036] Aerosol generating articles may include a mouthpiece located at the mouth end of the aerosol generating article. The mouthpiece may be located directly downstream of and abutting against an aerosol cooling element. The mouthpiece may include a filter. The filter may be formed of one or more suitable filter materials. Many such filter materials are known in the art.
[0037] Preferably, the mouthpiece may include a filter tip formed from cellulose acetate tow.
[0038] The components of the aerosol-generating article (e.g., the aerosol-forming matrix and any other components of the aerosol-generating article, such as support elements, aerosol cooling elements, and mouthpieces) are surrounded by an outer packaging. The outer packaging is formed of any suitable material or combination of materials. Preferably, the outer packaging paper is cigarette paper.
[0039] An aerosol generating device is provided, which describes an apparatus that interacts with an aerosol-forming matrix of an aerosol-generating article to generate an aerosol. Preferably, the aerosol generating device is a smoking device that interacts with the aerosol-generating matrix of the aerosol-generating article to generate an aerosol that can be directly inhaled into the user's lungs through the user's mouth. The aerosol generating device may be a fixator for a smoking article.
[0040] Electromagnetic induction heating includes an induction coil and an aerosol generating device, which is generally called a sensor, and the induction coil is generally called an inductor. The aerosol generating device, as part of the heating section, can be installed on the aerosol generating device itself or within the aerosol-generated product. The heating section is preferably needle-shaped, strip-shaped, leaf-shaped, or tubular.
[0041] An aerosol generator is a portable or handheld device that can be comfortably held between the fingers of one hand. The shape of the aerosol generator is generally cylindrical. The aerosol generator can have a length between approximately 70 mm and approximately 120 mm.
[0042] The power source for the aerosol generating device can be any suitable power source, such as a DC voltage source, like a battery. In one embodiment, the power source is a lithium-ion battery. Alternatively, the power source can be a nickel-metal hydride battery, a nickel-cadmium battery, or a lithium-based battery, such as a lithium cobalt, lithium iron phosphate, lithium titanate, or lithium polymer battery. The weight of the power source should ensure that the overall weight of the smoking device can be comfortably held between the fingers of a user's single hand.
[0043] Compared with the prior art, the technical effects of this utility model are reflected in:
[0044] This invention places the induction heating element in the middle of the induction coil and adjusts its size and position to optimize the heating efficiency of the induction heating element, thereby providing users with a better suction experience. Attached Figure Description
[0045] Figure 1 This is a partial cross-sectional view of an aerosol generating device according to an embodiment of the present invention;
[0046] Figure 2 This is a partial cross-sectional view of an aerosol generating device according to an embodiment of the present invention.
[0047] The reference numerals in the attached figures are explained as follows:
[0048] 101 Casing
[0049] 102 Induction heating element
[0050] 103 Induction Coil
[0051] 104 Fastener
[0052] 105 Thermal Insulation Device
[0053] 200 Aerosol-generated products. Detailed Implementation
[0054] The following detailed description of the features and advantages of this utility model is sufficient to enable those skilled in the art to understand the technical content of this utility model and implement it accordingly. Furthermore, based on this specification, claims, and drawings, those skilled in the art can easily understand the related objectives and advantages of this utility model.
[0055] The terms "first," "second," and "third" used in this application are for descriptive purposes only and should not be construed as indicating or implying the quantity or order of the indicated technical features relative to their importance. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship or movement of the components in a specific orientation (as shown in the accompanying drawings). If the specific orientation changes, the directional indication will also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.
[0056] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0057] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be intervening elements. When an element is referred to as being "connected to" another element, it can be directly connected to the other element, or there may be one or more intervening elements. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.
[0058] In this article, the term "front end" refers to the end of the aerosol generating device that is closer to the user when in use; correspondingly, the term "rear end" refers to the end of the aerosol generating device that is further away from the user when in use.
[0059] The term “A extends beyond B” as used in this article refers to the fact that A extends further than B in a certain direction.
[0060] like Figure 1 and Figure 2The aerosol generating apparatus shown is arranged to heat an aerosol generating article 200 to generate aerosols. The aerosol generating article 200 is typically in the form of a cigarette, including a puffable material at the tip, a cooling structure in the middle, and a filter structure at the mouthpiece. The aerosol generating apparatus and the inserted aerosol generating article 200 constitute an aerosol generating system.
[0061] An induction heating aerosol generating device is used to heat an aerosol generating product through induction heating to produce an aerosol for users to inhale. The aerosol generating device includes a housing, which can be composed of a front housing, a rear housing, and a top cover. A sliding cover and an insertion port are provided on the top cover. During use, the sliding cover can be moved to expose the insertion port, allowing the aerosol generating product 200 to be received. When not in use, the sliding cover can cover the insertion port to prevent foreign objects from entering.
[0062] The aerosol generating device also includes: an inductor, a power supply, an induction heating element, and a high-temperature resistant fixture.
[0063] The inductor includes an induction coil 103. The induction coil can be mounted on a coil support. The induction coil 103 can be a helical coil wound with conductive metal wire. The metal wire can be made of silver, copper, ferrite, magnetic materials, ceramics, powdered iron, etc. An insulating material can be applied to the outer surface of the metal wire. The metal wire can be multi-strand or single-strand. The cross-section of the metal wire can be circular, square, triangular, polygonal, etc.
[0064] A heat insulation component may be installed inside the induction coil 103 to prevent heat from the induction heating element 102 from dissipating to the outside. A magnetic concentrator may be installed outside the induction coil 103 to concentrate and optimize the magnetic field.
[0065] A power supply is connected to the induction coil and configured to provide a high-frequency current to the induction coil 103. In use, the induction coil 103 generates a fluctuating electromagnetic field that heats the induction heating element 102, which is in thermal contact with the aerosol generating article 200, thereby heating the aerosol generating matrix of the aerosol generating article 200. Preferably, the induction heating element 102 is in thermal contact with the outer surface of the aerosol generating article 200. The induction heating element 102 may be coaxially nested with the induction coil 103.
[0066] At least one end of the induction heating element 102 is provided with a high-temperature resistant fastener, which is used to fix the induction heating element 102 and the induction coil 103 relative to each other.
[0067] The length of the induction coil along the axial direction is L, the length of the induction heating element 102 along the axial direction is M, the distance by which the front end of the induction coil extends beyond the front end of the induction heating element is d1, and the distance by which the rear end of the induction coil extends beyond the rear end of the induction heating element is d2. The induction coil and the induction heating element satisfy the following relationship:
[0068] L=M+d1+d2, M / 4≥d1≥M / 12>0, M / 4≥d2≥M / 12>0.
[0069] Preferably, M / 6≥d1≥M / 8>0, M / 6≥d2≥M / 8>0.
[0070] Preferably, d1 ≥ d2.
[0071] Preferably, d1 = d2.
[0072] Preferably, d1 = d2 = M / 6.
[0073] In one embodiment, the radius of the induction coil 103 is r.
[0074] Preferably, r>(d1+d2)>r / 2.
[0075] Preferably, the distance between the outer surface of the induction heating element 102 and the induction coil 103 is at least r / 4.
[0076] To verify the correlation between the diameter of the induction coil and the length difference between the coil and the induction heating element on the heating rate and the energy consumption of the induction heating element, the following tests were conducted.
[0077] Table 1. Relevant Test Results
[0078]
[0079] In Table 1, "Energy consumption of one working cycle" refers to the total energy consumption during the process of completely depleting an aerosol generating product by sensing the heating element.
[0080] As can be seen, there is a relationship between the heating rate of the induction heating element and d1 / d2. The shorter the time it takes for the induction heating element to heat to 250℃, the higher its heating rate. Data analysis reveals a linear functional relationship between the heating rate and d1 / d2; that is, the higher the d1 / d2, the lower the heating rate of the induction heating element.
[0081] Furthermore, the relationship between the temperature uniformity of the induction heating element and d1 / d2 can be observed. When the induction heating element is heated to 250℃, the smaller the temperature difference between its two ends and the middle, the higher the temperature uniformity of the induction heating element. Data analysis reveals a functional relationship between the heating rate of the induction heating element and d1 / d2; that is, the higher the d1 / d2, the higher the temperature uniformity of the induction heating element.
[0082] Furthermore, the relationship between the energy consumption of the induction heating element and d1 / d2 can be observed. Through data analysis, it was found that the energy consumption of the induction heating element reaches an extreme point when d1 = d2 = M / 6 = r / 3, reaching a minimum.
[0083] The terminology and expressions used herein are for descriptive purposes only, and this invention should not be limited to these terms and expressions. The use of these terms and expressions does not mean the exclusion of any illustrative and descriptive equivalent features (or parts thereof), and it should be recognized that various modifications that may exist should also be included within the scope of the claims. Other modifications, variations, and substitutions may also exist. Accordingly, the claims should be considered to cover all such equivalents.
[0084] Similarly, it should be noted that although the present invention has been described with reference to the specific embodiments described above, those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and various equivalent changes or substitutions can be made without departing from the spirit of the present invention. Therefore, any changes or modifications to the above embodiments within the scope of the essential spirit of the present invention will fall within the scope of the claims of the present invention.
Claims
1. An induction heating aerosol generating device, which heats an aerosol generating product by induction heating to generate an aerosol for users to inhale; The aerosol generating device includes: A housing that defines a heated chamber for receiving at least a portion of the aerosol-generating article; An inductor, which includes an induction coil; A power source, connected to the induction coil and configured to provide a high-frequency current to the induction coil, wherein in use the induction coil generates a fluctuating electromagnetic field to heat an induction heating element that is in thermal contact with the aerosol generating article and thereby heats the aerosol generating matrix of the aerosol generating article. The induction coil is characterized by having a length of L in the axial direction, the heating element having a length of M in the axial direction, the distance by which the front end of the induction coil extends beyond the front end of the heating element being d1, and the distance by which the rear end of the induction coil extends beyond the rear end of the heating element being d2. The induction coil and the heating element satisfy the following relationship: L=M+d1+d2, M / 4≥d1≥M / 12>0, M / 4≥d2≥M / 12>0.
2. The induction heating aerosol generating device according to claim 1, characterized in that, The distance d1 from the front end of the induction coil to the front end of the induction heating element and the distance d2 from the rear end of the induction coil to the rear end of the induction heating element satisfy the following relationship: d1≥d2.
3. The induction heating aerosol generating device according to claim 2, characterized in that, The distance d1 from the front end of the induction coil to the front end of the induction heating element and the distance d2 from the rear end of the induction coil to the rear end of the induction heating element satisfy the following relationship: d1 = d2.
4. The induction heating aerosol generating device according to claim 1, characterized in that, The length M of the induction heating element in the axial direction, the distance d1 of the front end of the induction coil extending beyond the front end of the induction heating element, and the distance d2 of the rear end of the induction coil extending beyond the rear end of the induction heating element satisfy the following relationship: d1 = d2 = M / 6.
5. The induction heating aerosol generating device according to claim 1, characterized in that, The inductive heating element is in thermal contact with the outer surface of the aerosol-generated product.
6. The induction heating aerosol generating device according to claim 1, characterized in that, The radius r of the induction coil, the distance d1 of the front end of the induction coil extending beyond the front end of the induction heating element, and the distance d2 of the rear end of the induction coil extending beyond the rear end of the induction heating element satisfy the following relationship: r>(d1+d2)>r / 2.
7. The induction heating aerosol generating device according to claim 1, characterized in that, The induction heating element and the induction coil are coaxially nested.
8. The induction heating aerosol generating apparatus according to claim 6, characterized in that, The distance between the outer surface of the induction heating body and the induction coil is at least r / 4.
9. The induction heating aerosol generating device according to claim 1, characterized in that, A magnetic field concentrator is provided on the outside of the induction coil.
10. The induction heating aerosol generating device according to claim 1, characterized in that, It also includes a high-temperature resistant fastener, at least one end of the induction heating element is provided with the high-temperature resistant fastener, the high-temperature resistant fastener is used to fix the induction heating element and the induction coil relative to each other.