Aerosol generating device

Abstract

The invention relates to the field of novel tobaccos, in particular to an aerosol generating device which comprises a shell, a heating assembly and a fixing assembly, the heating assembly comprises a heating piece, the heating piece is used for heating an aerosol forming matrix to generate aerosol, the fixing assembly fixes the heating assembly in the shell, the heating assembly further comprises an electromagnetic coil, and the electromagnetic coil is arranged in the shell. The variable magnetic field is used for forming a variable magnetic field; a containing cavity and a heating cavity are formed in the aerosol generating device, the heating piece is arranged in the heating cavity to heat external air to form heating airflow, the containing cavity contains at least one part of the aerosol forming matrix, and the heating airflow flows from the far end of the heating cavity to the near end of the containing cavity to heat the aerosol forming matrix to generate aerosol. The heat conduction support is combined with electromagnetic heating and airflow heating to form a more uniform heating assembly and a better aerosol generating device.

Description

Technical Field

[0001] The present application relates to the field of novel tobacco, and in particular to an aerosol generating device. Background Art

[0002] As countries gradually tighten their control over cigarettes and people pay more and more attention to health, a type of heat-not-burn e-cigarette has become increasingly popular in recent years. It is a product that mainly converts nicotine and other substances in tobacco into vapor through atomization and other means, and then allows users to inhale it.

[0003] At present, in the heat-not-burn electronic cigarette devices, they can be mainly divided into two types according to the heating type: internal heating and external heating. Among them, the temperature required for internal heating is relatively high, and the cigarette is not heated evenly; external heating needs to penetrate the cigarette paper before heating the cigarette, which has a certain impact on the smoke quality.

[0004] External heating based on the principle of electromagnetic heating can provide a higher heating temperature. Its coil will generate heat when working, but the heat generated by the coil cannot be used to heat the cigarette at all, making its energy consumption relatively high.

[0005] In addition, the hot air flow generated by the continuous increase in heating temperature can directly flow through the tobacco material and also take out the smoke, and its heating effect is more uniform compared to the internal heating and external heating methods. However, its energy can only heat the cigarette during the smoking process, and the frequency of use is low, which is not conducive to maintaining the temperature of the tobacco material when not smoking, and the effect of heating the tobacco material instantly from a low temperature is not good. Summary of the invention

[0006] In view of this, the purpose of this application is to provide an aerosol generating device to solve the above problems.

[0007] In order to solve the above technical problems, this application adopts the following technical solutions:

[0008] An aerosol generating device comprises: a shell, a heating assembly and a fixing assembly, the heating assembly comprises a heating element, the heating element is used to heat an aerosol-forming substrate to generate an aerosol, the fixing assembly fixes the heating assembly in the shell, the heating assembly further comprises: an electromagnetic coil, which is used to form a changing magnetic field so that the heating element generates inductive heat; a containing cavity and a heating cavity are formed inside the aerosol generating device, the heating element heats external air in the heating cavity to form a heated airflow, the containing cavity contains at least a part of the aerosol-forming substrate, the heated airflow flows from the distal end of the heating cavity to the proximal end of the containing cavity, and heats the aerosol-forming substrate to generate an aerosol.

[0009] Furthermore, the heating component also includes a heat-conducting bracket, the proximal end of the heat-conducting bracket forms a accommodating cavity, and the distal end of the heat-conducting bracket forms a heating cavity; a limiting member is arranged between the accommodating cavity and the heating cavity, and the heating element is isolated from the aerosol-forming matrix by the limiting member; the limiting member includes a ventilation screen.

[0010] Furthermore, the heating component also includes a heat-conducting bracket, the proximal end of the heat-conducting bracket forms a accommodating cavity, and the distal end of the heat-conducting bracket forms a heating cavity; the first part of the electromagnetic coil is arranged around the bottom of the accommodating cavity, and the second part of the electromagnetic coil is arranged around the heater; the heat-conducting bracket also includes a limiter, the limiter is arranged on the outside of the bottom of the accommodating cavity and the outside of the bottom of the heating cavity, and is used to limit the electromagnetic coil to be wound around the outer surface of the heat-conducting bracket, so that the changing magnetic field formed by the electromagnetic coil covers the heating element; a threading notch is provided on the limiter, and the self-threading notch of the electromagnetic coil is provided in the limiter.

[0011] Furthermore, the aerosol generating device also includes: a thermal insulation layer, which is arranged on the outside of the heat-conducting bracket and is used to wrap the accommodating cavity and the heating cavity; and a magnetic shielding layer, which is arranged on the outside of the thermal insulation layer and is used to magnetically shield the electromagnetic coil.

[0012] Furthermore, the heating element comprises a plurality of parallel tubular elements, which are compactly arranged and connected, and the heated airflow flows from the gaps between the tubular elements to the aerosol-forming matrix.

[0013] Furthermore, the heating element includes a first air guide element, a second air guide element and a support frame, the first air guide element includes a first air guide position, the second air guide element includes a second air guide position, the first air guide position is located on the outside of the first air guide element, the second air guide position is located on the inside of the second air guide element, and the axial projections of the first air guide position and the second air guide position are at least staggered; the support frame is located between the first air guide element and the second air guide element to support the first air guide element and the second air guide element.

[0014] Furthermore, the first air guide and the second air guide are alternately arranged, the first air guide position has a larger ventilation volume than the second air guide position, and the first air guide closest to the accommodating cavity is closer to the accommodating cavity than the second air guide closest to the accommodating cavity.

[0015] Furthermore, the heating component also includes: a limiting bracket, which is arranged at the bottom of the heating chamber to limit the heating element in the heating chamber. The limiting bracket is provided with a third air guide position, and the external air flows from the third air guide position to the heating chamber.

[0016] Furthermore, the surface of the limiting bracket close to the heating element is an uneven surface.

[0017] Furthermore, the heating component also includes: a heat-insulating bracket, including a first step and a second step arranged from the distal end to the proximal end, the first step carries the electromagnetic coil, and the second step carries the limiting bracket.

[0018] Furthermore, the heating component also includes: an insulating bracket, the insulating bracket is provided with a boss, the boss is provided with a conical air vent along its own axial direction, the maximum radial hole of the conical air vent is closer to the heating chamber than the minimum radial hole; the third part of the electromagnetic coil at least surrounds at least a part of the insulating bracket.

[0019] Furthermore, the aerosol generating device also includes: a temperature sensor, which is fixed on the side wall notch of the thermal insulation bracket.

[0020] Furthermore, the shell includes: an upper external bracket fixed to the upper end of the accommodating chamber, used to provide an entrance for placing the aerosol-forming matrix; a lower external bracket fixed to the lower end of the heating chamber, and provided with air holes for external air to flow into the heating chamber; and a side external bracket fixedly connecting the upper external bracket and the lower external bracket.

[0021] Wherein, the aerosol-generating article is a smoking article, comprising an aerosol-forming substrate, which generates an aerosol that can be directly inhaled into the lungs of the user through the user's mouth by heating. Preferably, the aerosol-forming substrate is a solid aerosol-forming substrate. The aerosol-forming substrate may include both solid and liquid components. Preferably, the aerosol-forming substrate includes nicotine. In some preferred embodiments, the aerosol-forming substrate includes tobacco.

[0022] Understandably, tobacco itself has a unique flavor and aroma, which is a key feature sought after by many aerosol-generating products. By extracting the active ingredients in tobacco and using them as part of the aerosol-generating matrix, the smoking experience of traditional tobacco products can be simulated. Nicotine is the main alkaloid in tobacco and is also sought after by many smokers. Adding tobacco extracts to the aerosol-generating matrix can ensure that the product contains the right amount of nicotine to meet the needs of users.

[0023] Aerosol generating device is used to describe a device that interacts with an aerosol-forming substrate of an aerosol generating article to generate an aerosol. Preferably, the aerosol generating device is a heated smoking article that interacts with an aerosol-generating substrate of an aerosol generating article to generate an aerosol that is directly inhalable into the lungs of a user through the user's mouth. The aerosol generating device may be a holder for a smoking article.

[0024] The control element may be a simple switch. Alternatively, the control element may be an electrical circuit and may include one or more microprocessors or microcontrollers.

[0025] The aerosol generating system may include an aerosol generating device and one or more aerosol generating products, wherein the aerosol generating device is equipped with a corresponding number of heating chambers to accommodate the aerosol generating products.

[0026] The heater can be an internal heater inserted into the aerosol generating product, an external heater located on the periphery of the aerosol generating product, or a heater combining the internal and external heaters; but it is not limited to these, as long as it can be used to heat the aerosol generating product to produce an aerosol that can be inhaled.

[0027] It can be seen from the above technical solution that the advantages and positive effects of the aerosol generating device proposed in this application are:

[0028] This application generates an alternating current through an electromagnetic coil to heat the heating element, thereby heating the air stored around the heating element, and the external air flowing through it during suction is also heated to form a hot air flow, which flows to the aerosol forming matrix to excite the aerosol. Furthermore, the excess heat generated by the heating element will be transferred to the top of the accommodating cavity through the heat-conducting bracket to form a certain temperature field. The peripheral temperature of the temperature field formed in this way generally does not exceed 200°C, and the temperature requirements for peripheral heating cannot be met. It can only provide basic insulation function for the aerosol generating matrix. In this way, the hot air flow can be used to bring out the smoke during suction, and the excess heat generated by the heating element and the electromagnetic coil can be exported through the thermal conductivity when not suctioning, forming an insulating outer layer in the accommodating cavity, effectively utilizing the advantages of electromagnetic heating and airflow heating, while the energy utilization is relatively high, avoiding the shortcomings of both, forming a more uniform heating component and a better aerosol generating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above content of the present application and the following specific implementation methods will be better understood when read in conjunction with the accompanying drawings. It should be noted that the accompanying drawings are only examples of the technical solutions claimed for protection.

[0030] Figure 1 is a structural diagram of an aerosol generating device provided by the present application;

[0031] Figure 2 is a three-dimensional diagram of the heat-conducting bracket provided by the present application;

[0032] Figure 3 is a cross-sectional view of the heat-conducting bracket provided in the present application;

[0033] Figure 4 is a bottom view of the heat-conducting bracket provided in the present application;

[0034] Figure 5 is a structural diagram of a heating element provided in the first embodiment of the present application;

[0035] Figure 6 is a structural diagram of a heating element provided in a second embodiment of the present application;

[0036] Figure 7 is a cross-sectional view of a heating element provided in a second embodiment of the present application;

[0037] Figure 8 is an exploded view of a heating element provided in the second embodiment of the present application;

[0038] Fig. 9 It is a structural diagram of the limiting bracket provided in this application;

[0039] Fig.10 It is a structural diagram of the thermal insulation bracket provided in this application.

[0040] The reference numerals are described as follows:

[0041] an aerosol generating device 100;

[0042] Electromagnetic coil 10;

[0043] Heat generating elements 21, 22;

[0044] A first air guide 221;

[0045] First air guide position 2210;

[0046] A second air guide 222;

[0047] The second gas guide position 2220;

[0048] Support frame 223;

[0049] Thermally conductive bracket 30;

[0050] Accommodating chamber 301;

[0051] Heating chamber 302;

[0052] Ventilation screen 303; coil threading notch 304; coil stopper 305; stopper step 306;

[0053] Heat-insulating sealing silicone 40; limit bracket 50;

[0054] The third air guide position 51;

[0055] Strip support 52;

[0056] Connecting portion 53;

[0057] Gap 54;

[0058] Thermal insulation bracket 60;

[0059] First step 61;

[0060] The second step is 62;

[0061] Boss 63;

[0062] Conical vent hole 64;

[0063] Slope 65;

[0064] Side wall 66;

[0065] Housing 70;

[0066] Upper outer bracket 71;

[0067] Lower outer bracket 72;

[0068] Stoma 721;

[0069] Side outer bracket 73;

[0070] Insulation layer 80;

[0071] Upper insulation layer 81;

[0072] Lower insulation layer 82;

[0073] Temperature sensor 90;

[0074] Magnetic shielding layer 91;

[0075] Fixing assembly 92. DETAILED DESCRIPTION

[0076] The detailed features and advantages of the present application are described in detail in the specific implementation manner below, and the content is sufficient to enable any technical personnel in this field to understand the technical content of the present application and implement it accordingly. According to the description, claims and drawings disclosed in this specification, the technical personnel in this field can easily understand the relevant purposes and advantages of the present application.

[0077] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0078] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. The term "distal end" is used to indicate the end of the heated smoking device that is away from the consumer during use, and the term "proximal end" is used to indicate the end of the heated smoking device that is close to the consumer during use.

[0079] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0080] Please refer to Figure 1As shown, the present application provides an aerosol generating device 100, which may include: a housing 70, a heating component, a fixing component 92 and a sensor component.

[0081] The heating assembly includes an electromagnetic coil 10 and a heating element 21 . The electromagnetic coil 10 is used to form a changing magnetic field so that the heating element 21 generates inductive heat. The fixing assembly 92 fixes the heating assembly in the housing 70 .

[0082] The housing 70 may include an upper outer bracket 71, a side outer bracket 73 and a lower outer bracket 72. The upper outer bracket 71 is fixed to the upper end of the accommodating chamber 301, and is used to provide an entrance for placing the aerosol-forming substrate (e.g., cigarette). The lower outer bracket 72 is fixed to the lower end of the heating chamber 302, and is provided with an air hole 721 for external air to flow into the heating chamber 302. The side outer bracket 73 can be fixedly connected to the upper outer bracket 71 and the lower outer bracket 72 by a fixing component 92 such as a screw hole or a buckle.

[0083] Please refer to Figures 2 to 4 The heating assembly further includes: a heat-conducting bracket 30. The proximal end of the heat-conducting bracket 30 forms a receiving cavity 301, and the distal end of the heat-conducting bracket forms a heating cavity 302.

[0084] Among them, the aerosol-forming matrix may include a suction section and a matrix section. When the aerosol-forming matrix is ​​placed in the containing chamber 301, the suction section of the aerosol-forming matrix is ​​close to the top of the containing chamber 301, and the matrix section of the aerosol-forming matrix is ​​close to the bottom of the containing chamber 301.

[0085] The heating chamber 302 can accommodate the heating element 21. The inner surface contour of the heating chamber 302 can be designed in different shapes according to different heating elements 21 to maximize the space utilization of the heating chamber 302 and increase the heating efficiency. In addition, the outer contour of the heating element 21 can also be designed to match the inner surface contour of the heating chamber 302.

[0086] In one embodiment, a limiting member may be provided between the accommodating chamber 301 and the heating chamber 302, and the heating element 21 is isolated from the aerosol-forming matrix by the limiting member. The heating element 21 heats the external air in the heating chamber 302 to form a heated airflow, and the heated airflow flows from the limiting member to the matrix segment of the aerosol-forming matrix.

[0087] Specifically, the limiting member may include a ventilation screen 303 and a limiting step 306. The aerosol-forming matrix is ​​placed in the accommodating cavity 301 through the placement entrance of the upper outer bracket 71. The limiting step 306 supports the matrix segment of the aerosol-forming matrix and limits it in the accommodating cavity 301. The ventilation screen 303 limits the heating element 21 in the heating cavity 302. The limiting step 306 is spaced a certain distance from the ventilation screen 303 to prevent the heat generated by the heating element 21 from directly acting on the aerosol-forming matrix, so as to overheat the aerosol-forming matrix and affect the smoking taste.

[0088] The limiting member may also only include the ventilation partition 303, and the ventilation partition 303 itself may form a double-layer partition structure, with a certain distance between each layer of the partition.

[0089] In another embodiment, no limiting member may be provided in the heat conductive support 30, and the accommodating chamber 301 is directly connected to the heating chamber 302 to improve the heat transfer efficiency of the heated air from the heating chamber 302 to the aerosol forming substrate.

[0090] In the implementation of the present application, the heat-conducting bracket 30 can be an integrally formed design. The material of the heat-conducting bracket 30 can be a good heat-conducting material, such as metal. Preferably, the material of the heat-conducting bracket 30 is a non-magnetic material, for example, the metal can be selected from non-magnetic materials such as aluminum alloy and copper.

[0091] It is understandable that if a magnetic conductive material is selected for the thermal conductive bracket 30, the thermal conductive bracket 30 will be affected by the electromagnetic coil 10 to generate inductive heating, and the electrical energy will be converted into thermal energy to cause the thermal conductive bracket 30 to heat up as a whole, affecting the heat transfer and heat distribution of the heating element 21, and causing unnecessary heat loss.

[0092] The thermal conductive support 30 may further include a limiter, which may be a coil limiter 305. The coil limiter 305 is disposed on the bottom outer side of the accommodating cavity 301 and the bottom outer side of the heating cavity 302, and is used to limit the electromagnetic coil 10 from being wound around the heating cavity 302 of the thermal conductive support 30. A coil threading notch 304 is disposed on the coil limiter 305, and the electromagnetic coil 10 is wound around the coil threading notch 304 and is disposed in the coil limiter 305.

[0093] The first part of the electromagnetic coil 10 is arranged around the bottom of the accommodating cavity 301, and the second part of the electromagnetic coil 10 is arranged around the heating cavity 302, so as to ensure that the changing magnetic field formed by the electromagnetic coil 10 covers the heating element 21 in the heating cavity 302. Preferably, the electromagnetic coil 10 also includes a third part, which at least surrounds at least a part of the thermal insulation bracket 60 to ensure the uniformity of the magnetic lines of force passing through the heating element 21.

[0094] The aerosol generating device 100 may further include a thermal insulation layer 80 and a magnetic shielding layer 91. The thermal insulation layer 80 may be disposed outside the heat-conducting bracket 30 to wrap the outer surface of the accommodating cavity 301 and the electromagnetic coil 10, and the magnetic shielding layer 91 may be disposed outside the thermal insulation layer 80 to magnetically shield the electromagnetic coil 10.

[0095] In the implementation mode of the present application, the thermal insulation layer 80 may include an upper thermal insulation layer 81 and a lower thermal insulation layer 82, the upper thermal insulation layer 81 is connected to the lower thermal insulation layer 82, the upper thermal insulation layer 81 is arranged on the outside of the middle part of the accommodating cavity 301, and the lower thermal insulation layer 82 is arranged on the outside of the bottom of the accommodating cavity 301 and the outside of the heating cavity 302 around which the electromagnetic coil 10 is wound. The upper thermal insulation layer 81 and the lower thermal insulation layer 82 work together to prevent the internal heat from diffusing outward, and the thermal insulation layer 80 may be coated with a low thermal conductivity material, such as aerogel. The thermal insulation layer 80 may also adopt a vacuum tube solution, that is, the thermal insulation layer 80 is composed of an inner tube, an insulating skeleton and an outer covering layer, and the insulating skeleton is located on the outer wall of the inner tube to form a closed space of a certain thickness, that is, a gas insulation layer. The outer covering layer is wrapped on the insulating skeleton to protect and enhance the insulation effect.

[0096] The magnetic shielding layer 91 can prevent the internal magnetic field from spreading outward. For example, the ferrite material layer can be used as the magnetic shielding layer 91. It should be noted that in the aerosol generating device 100 provided in the present application, since the temperature of the electromagnetic heating part at the heating chamber 302 is relatively high, it is a better solution to first coat the thermal insulation layer 80 and then coat the magnetic shielding layer 91 outside the thermal insulation layer 80 to improve the effect of magnetic shielding.

[0097] Furthermore, the aerosol generating device 100 may also include a heat-insulating sealing silicone 40, which is arranged between the upper outer bracket 71 and the upper insulation layer 81 to prevent heat from being transferred from the insulation layer 80 and other components to the upper outer bracket 71 while providing airtightness.

[0098] In the embodiment of the present application, two optional heating element solutions are provided, as follows:

[0099] Please refer to Figure 5 The heating element 21 of the first embodiment provided in the present application includes a plurality of parallel tubular elements, each tubular element is closely arranged and connected, and the heated airflow flows from the gaps between the tubular elements to the aerosol-forming matrix.

[0100] The tubular member can be a cylindrical tube. After the cylindrical tubes are closely arranged, a heating element 21 that fills the heating chamber 302 is formed. The interior of the cylindrical tube is a through structure, and the gaps between the cylindrical tubes are combined to increase the contact area between the air flow and the cylindrical tube, thereby improving the heat exchange efficiency of the heating element 21 and forming a heating airflow.

[0101] The cylindrical tubes may be connected to each other by integral molding, or by welding, or by positioning members, and the positioning member may be the heating chamber 302 itself, and the plurality of cylindrical tubes may be positioned by the limited space of the heating chamber 302.

[0102] Please refer to Figures 6 to 8 The heat generating element 22 of the second embodiment provided by the present application comprises: a first air guide 221 , a second air guide 222 and a support frame 223 . The first air guide 221 and the second air guide 222 are arranged at both ends of the opening of the support frame 223 .

[0103] The first air guide 221 and the second air guide 222 may be air guide diaphragms, which are made of magnetic material and can generate heat in an alternating magnetic field. The support frame 223 is preferably made of non-magnetic conductive material to adapt to aerosol generating devices with a smaller rated power, so as to facilitate concentrated power induction heating of the air guide diaphragms. The wall thickness of the support frame 223 is affected by factors such as the structural strength and ventilation area of ​​the aerosol generating device 100, and is preferably between 0.35-0.5 mm.

[0104] The first air guide position 2210 corresponding to the first air guide member 221 can be set on the outer side close to the first air guide member 221, and the second air guide position 2220 corresponding to the second air guide member 222 can be set on the inner side close to the second air guide member 222, so that the axial projections of the first air guide position and the second air guide position are at least staggered, so as to increase the flow distance of the heating airflow between the first air guide member 221 and the second air guide member 222, and increase the temperature of the heating airflow.

[0105] Exemplarily, the first air guiding position 2210 may be disposed at an outer contour of the first air guiding member 221 , and the second air guiding position 2220 may be disposed at a center of the second air guiding member 222 .

[0106] The first air guiding position 2210 may also be disposed at a position close to the outer contour of the first air guiding member 221 , and the second air guiding position 2220 may be disposed at a position close to the center of the second air guiding member 222 .

[0107] External air enters the support frame 223 from the second air guide position 2220, and is heated by the first air guide 221 and the second air guide 222 to form heated air, which flows toward the aerosol-forming substrate.

[0108] In addition, the first air guiding position 2210 corresponding to the first air guiding member 221 may also be disposed on the inner side close to the first air guiding member 221 , and the second air guiding position 2220 corresponding to the second air guiding member 222 may be disposed on the outer side close to the second air guiding member 222 , but the present application is not limited thereto.

[0109] Furthermore, there are a plurality of first air guides 221 and second air guides 222, which are alternately arranged, and adjacent first air guides 221 and second air guides 222 are supported by support frames 223. Preferably, the heating element 22 forms a heating element 22 of first air guide 221-support frame 223-second air guide 222-support frame 223-first air guide 221 from the proximal end to the distal end, and the bottom of the heating element 22 is the first air guide 221, and the first air guide position of the first air guide 221 has a larger air flow rate relative to the second air guide position 2220 of the second air guide 222, that is, a structure is formed in which more heated air enters and less exits, so that the heated air can be fully heated, and the heated air can smoothly flow to the accommodating cavity through the first air guide hole to heat the aerosol-forming matrix.

[0110] It can be understood that the present application takes the heating element 21 of the first embodiment as an example for explanation, and is also applicable to the heating element 22 of the second embodiment.

[0111] Please refer to Fig. 9 The heating assembly may further include a limiting bracket 50, which is disposed at the bottom of the heating chamber 302 and can limit the axial downward freedom of the heating element 21. The limiting bracket 50 cooperates with the ventilation screen 303 to limit the heating element 21 in the heating chamber 302.

[0112] The connection between the surface of the limiting bracket 50 close to the heating element 21 and the heating element 21 can be point contact or line contact, or a combination of point contact and line contact, so as to reduce the heat transfer from the heating element 21 to the limiting bracket 50 .

[0113] Exemplarily, the surface of the limiting bracket 50 close to the heating element 21 is provided with a third air guide 51, which is composed of a plurality of strip support members 52, and the heating element 21 forms a line contact with the strip support members 52 of the limiting bracket 50. External air flows from the gaps between the strip support members 52 to the heating chamber 302, and sufficient ventilation is provided through the third air guide 51, and a certain heat resistance effect is played on the heating element 21.

[0114] The edge surface of the limiting bracket 50 close to the heating element 21 is provided with an uneven connecting portion 53, the heating element 21 forms a point contact with the edge of the limiting bracket 50, and the external air can flow into the heating chamber 302 from the connecting portion, increasing the external air intake.

[0115] In one embodiment, the strip support member 52 of the limiting bracket 50 can be a bent structure, and the axially upward bent portion of the strip support member 52 supports the heating element 21 and is point-contacted with the heating element 21, so that the surface of the limiting bracket 50 close to the heating element 21 is an uneven surface, so as to further reduce the heat transfer from the heating element 21 to the limiting bracket 50.

[0116] Please refer to Fig.10 and Figure 1 The heating assembly further includes a heat insulating bracket 60, which is disposed between the lower outer bracket 72 of the housing 70 and the limiting bracket 50. Specifically, the outer surface of the heat insulating bracket 60 is provided with a first step 61 and a second step 62 from the distal end to the proximal end, the first step 61 carries the coil limiting member 305 of the heat conductive bracket 30 and the electromagnetic coil 10 on the coil limiting member 305, the second step 62 carries the limiting bracket 50, and the lower outer bracket 72 carries the heat insulating bracket 60.

[0117] It can be understood that when both the heat-conducting bracket 30 and the limiting bracket 50 are made of metal materials, the temperature is high during the operation of the aerosol generating device 100, and the multi-step design of the thermal insulation bracket 60 can disperse and slow down the heat of the heat-conducting bracket 30 and the thermal insulation bracket, improve the propagation path in the structure of the thermal insulation bracket 60 itself, and reduce the heat conduction efficiency of the heat generating component 21 to the shell 70.

[0118] The second step 62 of the heat insulating bracket 60 is provided with a boss 63 adapted to the inner surface profile of the limit bracket 50. The limit bracket 50 is assembled on the boss 63. The middle part of the boss 63 is provided with a ventilation structure in the axial direction of the heat insulating bracket 60 itself. The ventilation structure is provided with a slope 65 extending inward for a certain distance near the opening end of the limit bracket 50. Preferably, the slope 65 is a trumpet-shaped structure. The ventilation structure is provided with a conical vent hole 64 away from the opening end. The slope 65 is connected to the conical vent hole 64. The maximum radial hole of the conical vent hole 64 is closer to the heating chamber 302 than the minimum radial hole. The position of the minimum radial hole of the conical vent hole 64 corresponds to the air hole 721 of the lower outer bracket 72.

[0119] It can be understood that, compared with the conventional straight ventilation structure, the slope 65 of the insulation bracket 60 combined with the setting of the conical ventilation structure can increase the amount of heat radiation upward from the shaft, guide the heated airflow to form vortex or reflux, and help improve the heating effect of the heated air.

[0120] The material of the heat insulating bracket 60 can be a non-metallic material with low thermal conductivity, such as ceramic (alumina, zirconia, etc.), or high temperature resistant silica gel can also be used. Preferably, the material of the heat insulating bracket is a non-magnetic material.

[0121] Furthermore, the sensing component has at least a portion of a temperature sensor 90 that can be fixed close to the heating chamber 302 to obtain the temperature of the heating element 21.

[0122] The temperature sensor 90 can be fixed to the side wall notch 66 of the heat insulating bracket 60 near the heating element 21 by gluing or laser welding through the notch 54 of the limiting bracket 50. It can be understood that the limiting bracket 50 and the heating element 21 are made of metal materials. Since metal materials have a fast heat conduction speed, this position can better reflect the temperature level of the heating area.

[0123] It can be understood that the present application cleverly uses the alternating current excited by the electromagnetic coil 10 to drive the heating element 21 to generate heat, thereby heating the air around it. During the suction process, the external air flows through and is also heated to form a hot air flow. This hot air flow then passes through the ventilation screen 303 and acts on the aerosol forming matrix, prompting it to stimulate the production of aerosols. Furthermore, the excess heat generated by the heating element is transferred to the proximal end of the accommodating cavity 301 through the efficient heat-conducting bracket 30 to construct a temperature field. It is worth noting that the peripheral temperature of the temperature field is carefully controlled within a range that is usually not more than 200°C. Although this fails to meet the stringent requirements of direct peripheral heating, it is sufficient to provide a basic and stable insulation effect for the aerosol generating matrix.

[0124] When the puffing action occurs, the hot air flow can effectively carry and release the smoke; in the non-puffing state, thanks to the excellent thermal conductivity of the metal material of the heat-conducting bracket 30 and the structure of the accommodating chamber 301 connected to the heating chamber 302, the extra heat generated by the heating element 21 and the electromagnetic coil 10 can be effectively discharged, and a heat preservation layer is formed around the accommodating chamber 301. This design not only cleverly combines the dual advantages of electromagnetic heating and airflow heating, but also significantly improves the energy utilization efficiency, while avoiding the potential defects of both, thereby realizing a device with more uniform heating and better aerosol generation effect, bringing better user experience.

[0125] The terms and expressions used herein are for descriptive purposes only and the present application should not be limited to these terms and expressions. The use of these terms and expressions does not mean to exclude any equivalent features of the illustrations and descriptions (or parts thereof), and it should be recognized that various modifications that may exist should also be included in the scope of the claims. Other modifications, variations and substitutions may also exist. Accordingly, the claims should be deemed to cover all such equivalents.

[0126] Similarly, it should be pointed out that although the present application has been described with reference to the current specific embodiments, ordinary technicians in this technical field should realize that the above embodiments are only used to illustrate the present application, and various equivalent changes or substitutions may be made without departing from the spirit of the invention. Therefore, as long as the changes and modifications to the above embodiments are within the essential spirit of the present application, they will fall within the scope of the claims of the present application.

Claims

1. An aerosol generating device, comprising: A housing, a heating component and a fixing component, wherein the heating component includes a heating element, the heating element is used to heat an aerosol-forming substrate to generate an aerosol, and the fixing component fixes the heating component in the housing, wherein the heating component further includes: An electromagnetic coil is used to form a changing magnetic field so that the heating element is induced to heat; A containing chamber and a heating chamber are formed inside the aerosol generating device. The heating element heats external air in the heating chamber to form a heated airflow. The containing chamber contains at least a portion of the aerosol-forming substrate. The heated airflow flows from the distal end of the heating chamber to the proximal end of the containing chamber, and heats the aerosol-forming substrate to generate an aerosol.

2. The aerosol generating device according to claim 1, characterized in that: The heating component also includes a heat-conducting bracket, the proximal end of the heat-conducting bracket forms the accommodating cavity, and the distal end of the heat-conducting bracket forms the heating cavity; a limiting member is arranged between the accommodating cavity and the heating cavity, and the heating element is isolated from the aerosol-forming matrix by the limiting member; the limiting member includes a ventilation screen.

3. The aerosol generating device according to claim 1, characterized in that: The heating component also includes a heat-conducting bracket, the proximal end of the heat-conducting bracket forms the accommodating cavity, and the distal end of the heat-conducting bracket forms the heating cavity; the first part of the electromagnetic coil is arranged around the bottom of the accommodating cavity, and the second part of the electromagnetic coil is arranged around the heating cavity; the heat-conducting bracket also includes a limiter, which is arranged on the outside of the bottom of the accommodating cavity and the outside of the bottom of the heating cavity, and is used to limit the electromagnetic coil to be wound around the outer surface of the heat-conducting bracket, so that the changing magnetic field formed by the electromagnetic coil covers the heating element; the limiter is provided with a threading notch, and the electromagnetic coil is arranged in the limiter from the threading notch.

4. The aerosol generating device according to claim 3, characterized in that: The aerosol generating device further comprises: A heat-insulating layer, disposed on the outside of the heat-conducting bracket, and used to wrap the accommodating cavity and the heating cavity; The magnetic shielding layer is arranged outside the thermal insulation layer and is used for magnetic shielding of the electromagnetic coil.

5. The aerosol generating device according to claim 1, characterized in that: The heating element comprises a plurality of parallel tubular elements, which are compactly arranged and connected, and the heated airflow flows from the gaps between the tubular elements to the aerosol-forming substrate.

6. The aerosol generating device according to claim 1, characterized in that: The heating element includes a first air guide element, a second air guide element and a support frame, the first air guide element includes a first air guide position, the second air guide element includes a second air guide position, the first air guide position is located on the outside of the first air guide element, the second air guide position is located on the inside of the second air guide element, and the axial projections of the first air guide position and the second air guide position are at least staggered; the support frame is located between the first air guide element and the second air guide element to support the first air guide element and the second air guide element.

7. The aerosol generating device according to claim 6, characterized in that: The first air guide member and the second air guide member are arranged alternately, the first air guide position has a larger ventilation volume than the second air guide position, and the first air guide member closest to the accommodating cavity is closer to the accommodating cavity than the second air guide member closest to the accommodating cavity.

8. The aerosol generating device according to claim 1, characterized in that: The heating assembly also includes: A limiting bracket is arranged at the bottom of the heating chamber to limit the heating element in the heating chamber. The limiting bracket is provided with a third air guide position, and the external air flows from the third air guide position to the heating chamber.

9. The aerosol generating device according to claim 8, characterized in that: The surface of the limiting bracket close to the heating element is an uneven surface.

10. The aerosol generating device according to claim 8, characterized in that The heating assembly also includes: The heat-insulating bracket comprises a first step and a second step arranged from the distal end to the proximal end, the first step carries the electromagnetic coil, and the second step carries the limiting bracket.

11. The aerosol generating device according to claim 8, characterized in that: The heating assembly also includes: a thermal insulation bracket, the thermal insulation bracket is provided with a boss, the boss is provided with a conical air vent along its own axial direction, the maximum radial hole of the conical air vent is closer to the heating chamber than the minimum radial hole; the third part of the electromagnetic coil at least surrounds at least a part of the thermal insulation bracket.

12. The aerosol generating device according to claim 10 or 11, characterized in that: The aerosol generating device further comprises: A temperature sensor is fixed on the side wall notch of the thermal insulation bracket.

13. The aerosol generating device according to claim 1, characterized in that: The housing comprises: An upper outer bracket, fixed to the upper end of the accommodating cavity, for providing an entrance for placing the aerosol-forming substrate; A lower outer bracket, fixed to the lower end of the heating chamber, provided with air holes for the external air to flow into the heating chamber; The side outer bracket is fixedly connected to the upper outer bracket and the lower outer bracket.

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