Aerosol generating device

Abstract

The utility model 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 new tobacco, in particular to an aerosol generating device. BACKGROUND

[0002] With the gradual strengthening of the regulation of cigarettes in various countries and the increasing emphasis on health, in recent years, a type of heat-not-burn electronic cigarette has become increasingly popular. It mainly changes nicotine and other substances in tobacco into vapor through atomization and other means for users to smoke.

[0003] At present, in the heat-not-burn electronic cigarette, according to the heating type, it can be mainly divided into internal heating and external heating. Among them, the internal heating needs a higher temperature, and the cigarette is not heated uniformly; the external heating needs to penetrate the cigarette paper before heating the cigarette, which has a certain influence on the smoke quality.

[0004] And based on the principle of electromagnetic heating, external heating can provide a relatively high heating temperature. The coil will heat up when working, and the heat generated by the coil cannot be used to heat the cigarette, so that its energy consumption is relatively high.

[0005] In addition, the hot air flow generated by the rising heating temperature can directly flow through the tobacco material or carry out the smoke, and the heating effect is more uniform than the internal heating and external heating. But its energy can only heat the cigarette during the smoking process, the use frequency is low, which is not conducive to the temperature maintenance of the tobacco material when not smoking, and the effect of instant heating of the tobacco material from low temperature is not good. CONTENT OF THE INVENTION

[0006] Therefore, the present application aims to provide an aerosol generating device to solve the above problems.

[0007] To solve the above technical problems, the present application adopts the following technical solutions:

[0008] An aerosol generating device, the aerosol generating device comprising: a housing, a heating assembly and a fixing assembly, the heating assembly comprising a heating element, the heating element being configured to heat an aerosol-forming substrate to generate an aerosol, the fixing assembly being configured to fix the heating assembly in the housing, the heating assembly further comprising: an electromagnetic coil configured to form a varying magnetic field to cause the heating element to inductively heat; the aerosol generating device forming an accommodation cavity and a heating cavity inside, the heating element being in the heating cavity to heat the external air to form a heated air flow, the accommodation cavity accommodating at least a portion of the aerosol-forming substrate, the heated air flow flowing from the distal end of the heating cavity to the proximal end of the accommodation cavity to heat the aerosol-forming substrate to generate the aerosol.

[0009] Further, the heating assembly further comprises a heat-conducting support, a proximal end of the heat-conducting support forms the accommodating cavity, and a distal end of the heat-conducting support forms the heating cavity; a limiting member is arranged between the accommodating cavity and the heating cavity, the heating element is isolated from the aerosol-forming substrate by the limiting member; the limiting member comprises an air-permeable mesh.

[0010] Further, the heating assembly further comprises a heat-conducting support, a proximal end of the heat-conducting support forms the accommodating cavity, and a distal end of the heat-conducting support forms the heating cavity; a first part of the electromagnetic coil is arranged around the bottom of the accommodating cavity, and a second part of the electromagnetic coil is arranged around the heater; the heat-conducting support further comprises a limiting member, the limiting member is arranged outside the bottom of the accommodating cavity and outside the bottom of the heating cavity, and is used for limiting the electromagnetic coil to be wound on the outer surface of the heat-conducting support, so that the varying magnetic field formed by the electromagnetic coil covers the heating element; the limiting member is provided with a threading gap, and the electromagnetic coil is arranged in the limiting member from the threading gap.

[0011] Further, the aerosol-generating device further comprises: a heat-insulating layer arranged outside the heat-conducting support, used for wrapping the accommodating cavity and the heating cavity; and a magnetic shielding layer arranged outside the heat-insulating layer, used for magnetically shielding the electromagnetic coil.

[0012] Further, the heating element comprises a plurality of parallel tubular members, the tubular members are compactly arranged and connected, and the heated air flows from the gaps between the tubular members to the aerosol-forming substrate.

[0013] Further, the heating element comprises a first air guide, a second air guide, and a support frame, the first air guide comprises a first air guide position, the second air guide comprises a second air guide position, the first air guide position is located outside the first air guide, the second air guide position is located inside the second air guide, and the projection of the first air guide position and the second air guide position in the axial direction is at least staggered; the support frame is located between the first air guide and the second air guide to support the first air guide and the second air guide.

[0014] Further, the first air guide and the second air guide are arranged alternately, the first air guide position has more air permeability relative to the second air guide position, and the first air guide closest to the accommodating cavity is closer to the accommodating cavity relative to the second air guide closest to the accommodating cavity.

[0015] Further, the heating assembly further comprises a limiting support arranged at the bottom of the heating cavity to limit the heating element in the heating cavity, and the limiting support is provided with a third air guide position, and the external air flows to the heating cavity from the third air guide position.

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

[0017] Further, the heating assembly further comprises a heat-insulating support comprising 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 support.

[0018] Further, the heating assembly further comprises: a heat insulation support, the heat insulation support is provided with a boss, the boss is provided with a tapered vent hole along the axial direction of the boss, the largest radial hole of the tapered vent hole is closer to the heating cavity than the smallest radial hole; the third portion of the electromagnetic coil at least surrounds at least a portion of the heat insulation support.

[0019] Further, the aerosol-generating device further comprises: a temperature sensor, the temperature sensor is fixed on the side wall notch of the heat insulation support.

[0020] Further, the shell comprises: an upper outer support fixed to the upper end of the accommodation cavity, for providing a placement entrance of the aerosol-forming substrate; a lower outer support fixed to the lower end of the heating cavity, provided with a gas hole for external air to flow into the heating cavity; a side outer support fixedly connected to the upper outer support and the lower outer support.

[0021] The aerosol-generating article is a smoking article comprising an aerosol-forming substrate which, by heating, generates an aerosol that is directly inhalable by a user into the lungs of the user through the mouth of the user. Preferably, the aerosol-forming substrate is a solid aerosol-forming substrate. The aerosol-forming substrate can comprise both solid and liquid components. Preferably, the aerosol-forming substrate comprises nicotine. In some preferred embodiments, the aerosol-forming substrate comprises tobacco.

[0022] It can be understood that tobacco itself has a unique flavor and aroma, which is a key feature that many aerosol-generating articles pursue. By extracting effective components from tobacco and using them as part of the aerosol-forming substrate, the smoking experience of traditional tobacco products can be simulated. Nicotine is the main alkaloid in tobacco and is also the component that many smokers pursue. Adding tobacco extract to the aerosol-forming substrate can ensure that the product contains an appropriate amount of nicotine to meet the needs of users.

[0023] The aerosol-generating device is used to illustrate a device that interacts with the aerosol-forming substrate of the aerosol-generating article to generate an aerosol. Preferably, the aerosol-generating device is a heating appliance that interacts with the aerosol-forming substrate of the aerosol-generating article to generate an aerosol that is directly inhalable by a user into the lungs of the user through the mouth of the user. The aerosol-generating device can be a holder for a smoking article.

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

[0025] The aerosol-generating system can comprise the aerosol-generating device and one or more aerosol-generating articles, the aerosol-generating device being configured to receive the corresponding number of heating chambers containing the aerosol-generating articles.

[0026] The heater can be an inner heater for insertion into the aerosol generating article, an outer heater located at the periphery of the aerosol generating article, or a combination of the inner and outer heaters, but is not limited thereto as long as it can be used to heat the aerosol generating article to generate aerosol for smoking.

[0027] From the above technical solutions, the aerosol generating device provided by the present application has the following advantages and positive effects:

[0028] The alternating current generated by the electromagnetic coil of the present application makes the heating element heat up, and then the air stored around the heating element is heated. The external air flowing through the heating element is also heated, forming a hot air flow. These hot air flows excite aerosol from the aerosol forming substrate. Further, the excess heat generated by the heating element is transferred to the top of the accommodation cavity through the heat-conducting support, forming a certain temperature field. The peripheral temperature of the temperature field formed in this way is generally not more than 200℃, which cannot reach the temperature requirement of peripheral heating and can only provide basic heat preservation function for the aerosol generating substrate. In this way, the hot air flow can carry out the smoke during smoking, and the excess heat generated by the heating element and the electromagnetic coil can be conducted out through the heat-conducting property during non-smoking, forming a heat preservation outer layer in the accommodation cavity. The advantages of electromagnetic heating and airflow heating are effectively utilized, the energy utilization is relatively high, the shortcomings of the two are avoided, a more uniform heating assembly and a better aerosol generating device are formed. BRIEF DESCRIPTION OF DRAWINGS

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

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

[0031] Figure 2 is a perspective view of the heat-conducting support provided by the present application;

[0032] Figure 3 is a sectional view of the heat-conducting support provided by the present application;

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

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

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

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

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

[0038] Figure 9 is a structural view of the limiting support provided in the present application;

[0039] Figure 10 is a structural view of the heat insulation support provided in the present application.

[0040] Among them, the reference signs are explained as follows:

[0041] The aerosol generating device 100;

[0042] The electromagnetic coil 10;

[0043] The heating element 21, 22;

[0044] The first air guide 221;

[0045] The first air guide position 2210;

[0046] The second air guide 222;

[0047] The second air guide position 2220;

[0048] The support frame 223;

[0049] The heat conduction support 30;

[0050] The accommodating cavity 301;

[0051] The heating cavity 302;

[0052] The air passage screen 303; the coil threading notch 304; the coil limiting piece 305; the limiting step 306;

[0053] The heat insulation sealing silica gel 40; the limiting support 50;

[0054] The third air guide position 51;

[0055] The strip-shaped support piece 52;

[0056] The connecting part 53;

[0057] The notch 54;

[0058] The heat insulation support 60;

[0059] The first step 61;

[0060] The second step 62;

[0061] The boss 63;

[0062] The conical air passage hole 64;

[0063] The slope surface 65;

[0064] side wall 66;

[0065] housing 70;

[0066] upper outer support 71;

[0067] lower outer support 72;

[0068] air hole 721;

[0069] side outer support 73;

[0070] thermal insulation layer 80;

[0071] upper thermal insulation layer 81;

[0072] lower thermal 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 will be described in detail in the following detailed description of the application, which is sufficient for any person skilled in the art to understand the technical content of the present application and to implement it, and according to the description, claims and drawings disclosed in the specification, those skilled in the art can easily understand the related purposes and advantages of the present application.

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

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

[0079] In order to make the purposes, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

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

[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 to make the heating element 21 inductive heating, and the fixing assembly 92 fixes the heating assembly in the housing 70.

[0082] The housing 70 can include an upper outer support 71, a side outer support 73 and a lower outer support 72. The upper outer support 71 is fixed to the upper end of the accommodation cavity 301, and is used to provide a placement entrance for the aerosol forming substrate (for example: a cigarette). The lower outer support 72 is fixed to the lower end of the heating cavity 302, and is provided with an air hole 721 for external air to flow into the heating cavity 302. The side outer support 73 can be fixedly connected to the upper outer support 71 and the lower outer support 72 through the fixing assembly 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 support 30. The proximal end of the heat-conducting support 30 forms the accommodation cavity 301, and the distal end of the heat-conducting support forms the heating cavity 302.

[0084] The aerosol forming substrate can include a smoking section and a substrate section. When the aerosol forming substrate is placed in the accommodation cavity 301, the smoking section of the aerosol forming substrate is close to the top of the accommodation cavity 301, and the substrate section of the aerosol forming substrate is close to the bottom of the accommodation cavity 301.

[0085] The heating cavity 302 can accommodate the heating element 21. The inner surface profile of the heating cavity 302 can be designed in different shapes according to different heating elements 21 to improve the space utilization of the heating cavity 302 as much as possible and increase the heating efficiency. In addition, the outer profile of the heating element 21 can also be designed in a shape that matches the inner surface profile of the heating cavity 302.

[0086] In an embodiment, a limiting member can be arranged between the accommodation cavity 301 and the heating cavity 302. The heating element 21 is isolated from the aerosol forming substrate by the limiting member. The heating element 21 heats the external air in the heating cavity 302 to form a heated air flow, and the heated air flow flows from the limiting member to the substrate section of the aerosol forming substrate.

[0087] Specifically, the limiting member can include the ventilation barrier 303 and the limiting step 306, the aerosol-forming substrate is placed in the accommodation cavity 301 through the placement opening of the upper outer support 71, the limiting step 306 supports and limits the substrate section of the aerosol-forming substrate in the accommodation cavity 301, the ventilation barrier 303 limits the heating member 21 in the heating cavity 302, the limiting step 306 is spaced apart from the ventilation barrier 303, preventing the heat generated by the heating member 21 from directly acting on the aerosol-forming substrate, so as to excessively heat the aerosol-forming substrate and affect the smoking taste.

[0088] The limiting member can also only include the ventilation barrier 303, and the ventilation barrier 303 itself can form a double-layer barrier structure with a certain distance between the layers.

[0089] In another embodiment, the limiting member can not be provided in the heat-conducting support 30, and the accommodation cavity 301 is directly communicated with the heating cavity 302, so as to improve the heat transfer efficiency of the heated air from the heating cavity 302 to the aerosol-forming substrate.

[0090] In the implementable manner of the present application, the heat-conducting support 30 can be designed in one piece. The material of the heat-conducting support 30 can be selected from good heat-conducting materials, such as metal. Preferably, the material of the heat-conducting support 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 can be understood that if the heat-conducting support 30 is selected to be a magnetic material, the heat-conducting support 30 will be affected by the electromagnetic coil 10 to generate induction heating, which will convert electrical energy into heat energy to cause the heat-conducting support 30 to heat as a whole, affecting the heat transfer and heat distribution of the heating member 21, and causing unnecessary heat loss.

[0092] The heat-conducting support 30 can also include a limiting member, which can be a coil limiting member 305, the coil limiting member 305 is arranged at the bottom outer side of the accommodation cavity 301 and the bottom outer side of the heating cavity 302, for limiting the electromagnetic coil 10 to be wound around the heating cavity 302 of the heat-conducting support 30, and the coil limiting member 305 is provided with a coil threading gap 304, and the electromagnetic coil 10 is wound in the coil limiting member 305 from the coil threading gap 304.

[0093] The first part of the electromagnetic coil 10 is arranged around the bottom of the accommodation cavity 301, and the second part of the electromagnetic coil 10 is arranged around the heating cavity 302, for ensuring that the varying magnetic field formed by the electromagnetic coil 10 covers the heating member 21 in the heating cavity 302. Preferably, the electromagnetic coil 10 further includes a third part, which at least surrounds at least a part of the heat-insulating support 60, so as to ensure the uniformity of the magnetic lines of force passing through the heating member 21.

[0094] The aerosol-generating device 100 can further include a heat preservation layer 80 and a magnetic shielding layer 91. The heat preservation layer 80 can be arranged outside the heat-conducting support 30 to wrap the outer surface of the accommodation cavity 301 and the electromagnetic coil 10. The magnetic shielding layer 91 can be arranged outside the heat preservation layer 80 to magnetically shield the electromagnetic coil 10.

[0095] In an embodiment of the present application, the heat preservation layer 80 can include an upper heat preservation layer 81 and a lower heat preservation layer 82. The upper heat preservation layer 81 is connected to the lower heat preservation layer 82. The upper heat preservation layer 81 is arranged outside the middle part of the accommodation cavity 301. The lower heat preservation layer 82 is arranged outside the bottom of the accommodation cavity 301 and the heating cavity 302 wound by the electromagnetic coil 10. The upper heat preservation layer 81 and the lower heat preservation layer 82 jointly prevent the internal heat from spreading outward. The heat preservation layer 80 can use a low thermal conductivity material coating scheme, for example, aerogel. The heat preservation layer 80 can also adopt a vacuum tube scheme, that is, the heat preservation layer 80 is composed of an inner tube, a heat insulation skeleton and an outer cover layer. The heat insulation skeleton is located on the outer wall of the inner tube to form a closed space with a certain thickness, that is, a gas heat insulation layer. The outer cover layer is wrapped on the heat insulation skeleton to protect and enhance the heat insulation effect.

[0096] The magnetic shielding layer 91 can prevent the internal magnetic field from spreading outward. For example, a layer of ferrite material 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, the temperature of the electromagnetic heating part at the heating cavity 302 is relatively high. Therefore, it is a better scheme to first coat the heat preservation layer 80 and then coat the magnetic shielding layer 91 outside the heat preservation layer 80 to improve the magnetic shielding effect.

[0097] Further, the aerosol-generating device 100 can further include a heat insulation sealing silica gel 40 arranged between the upper outer support 71 and the upper heat preservation layer 81 to block the heat transfer from the heat preservation layer 80 and other components to the upper outer support 71 while providing air tightness.

[0098] In an embodiment of the present application, two optional heating elements 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. The tubular elements are closely arranged and connected. The heating airflow flows from the gaps between the tubular elements to the aerosol-forming substrate.

[0100] The tubular element can be a cylindrical tube. After the cylindrical tubes are closely arranged, the heating element 21 occupying the heating cavity 302 is formed. The inside of the cylindrical tube is a through structure. In combination with the gaps between the cylindrical tubes, the contact area of the air flow and the cylindrical tube is increased, thereby improving the heat exchange efficiency of the heating element 21 and forming the heating airflow.

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

[0102] Please refer to Figures 6 to 8 The heating element 22 of the second embodiment provided in the 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 the two ends of the opening of the support frame 223.

[0103] The first air guide 221 and the second air guide 222 can be air guide spacers made of magnetic materials and can generate heat in an alternating magnetic field. The support frame 223 is preferably made of a non-magnetic material to adapt to aerosol generating devices with smaller rated power, so as to concentrate power to inductively heat the air guide spacers. The wall thickness of the support frame 223 is affected by factors such as the structural strength and air passage area of the aerosol generating device 100, and is preferably between 0.35-0.5mm.

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

[0105] Exemplarily, the first air guide position 2210 can be arranged at the outer contour of the first air guide 221, and the second air guide position 2220 can be arranged at the center of the second air guide 222.

[0106] The first air guide position 2210 can also be arranged close to the outer contour of the first air guide 221, and the second air guide position 2220 can be arranged close to the center of the second air guide 222.

[0107] The external air enters the support frame 223 from the second air guide position 2220, and under the heating of the first air guide 221 and the second air guide 222, forms heated air and flows to the aerosol forming substrate.

[0108] In addition, the first air guide position 2210 corresponding to the first air guide 221 can also be arranged close to the inner side of the first air guide 221, and the second air guide position 2220 corresponding to the second air guide 222 can be arranged close to the outer side of the second air guide 222, and the application is not limited thereto.

[0109] Further, the first air guide 221 and the second air guide 222 are multiple, the first air guide 221 and the second air guide 222 are arranged alternately, and adjacent first air guide 221 and second air guide 222 are supported by support frame 223. Preferably, the heating element 22 from the proximal end to the distal end forms the heating element 22 of the first air guide 221-support frame 223-second air guide 222-support frame 223-first air guide 221, 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 is relative to the second air guide position 2220. The second air guide 222 has more air flow, that is, it forms a structure of more air in and less air out, so that the heated air can be fully heated, and the heated air can flow smoothly to the containing cavity through the first air guide hole to heat the aerosol forming substrate.

[0110] It can be understood that the first embodiment of the heating element 21 is taken as an example for illustration, and the second embodiment of the heating element 22 can also be applicable.

[0111] Please refer to Figure 9 The heating assembly can also include a limiting support 50, which is arranged at the bottom of the heating cavity 302 and can limit the axial downward freedom of the heating element 21. The limiting support 50 cooperates with the air passage screen 303 to limit the heating element 21 in the heating cavity 302.

[0112] The connection mode of the surface of the limiting support 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 of the heating element 21 to the limiting support 50.

[0113] Exemplarily, the surface of the limiting support 50 close to the heating element 21 is provided with a third air guide position 51, the third air guide position 51 is composed of a plurality of strip-shaped supports 52, and the heating element 21 and the strip-shaped supports 52 of the limiting support 50 form line contact. External air flows from the gap between each strip-shaped support 52 to the heating cavity 302, providing sufficient air flow through the third air guide position 51, and playing a certain heat-blocking role for the heating element 21.

[0114] The edge surface of the limiting support 50 close to the heating element 21 is provided with a concave-convex connecting part 53, the heating element 21 and the edge of the limiting support 50 form point contact, and external air can flow into the heating cavity 302 from the connecting part, increasing the air intake of external air.

[0115] In an embodiment, the strip-shaped supports 52 of the limiting support 50 can be a bending structure, the upward bending part of the strip-shaped supports 52 supports the heating element 21 and forms point contact with the heating element 21, and the surface of the limiting support 50 close to the heating element 21 is uneven, so as to further reduce the heat transfer of the heating element 21 to the limiting support 50.

[0116] Referring to Figure 10 and Figure 1 The heating assembly further comprises a heat insulation support 60, which is arranged between the lower outer support 72 of the shell 70 and the limiting support 50. Specifically, the outer surface of the heat insulation support 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 piece 305 of the heat conduction support 30 and the electromagnetic coil 10 on the coil limiting piece 305, the second step 62 carries the limiting support 50, and the lower outer support 72 carries the heat insulation support 60.

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

[0118] The second step 62 of the heat insulation support 60 is provided with a boss 63 matched with the inner surface profile of the limiting support 50, the limiting support 50 is assembled on the boss 63, the boss 63 is provided with a ventilation structure in the axial direction of the heat insulation support 60, the ventilation structure is provided with a slope surface 65 extending a certain distance inward near the open end of the limiting support 50, and preferably, the slope surface 65 is in a horn structure. The ventilation structure is provided with a tapered ventilation hole 64 away from the open end, the slope surface 65 is connected with the tapered ventilation hole 64, the maximum radial hole of the tapered ventilation hole 64 is closer to the heating cavity 302 relative to the minimum radial hole, and the position of the minimum radial hole of the tapered ventilation hole 64 corresponds to the air hole 721 of the lower outer support 72.

[0119] It can be understood that, compared with the conventional straight ventilation structure, the slope surface 65 of the heat insulation support 60 is matched with the tapered ventilation structure, which can increase the amount of heat radiation upward of the shaft body, guide the heating airflow to form a vortex or backflow, and help to improve the heating effect of the heating air.

[0120] The material of the heat insulation support 60 can be a non-metallic material with a 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 insulation support is a non-magnetic material.

[0121] Further, the sensing assembly has at least one temperature sensor 90 capable of being fixed close to the heating cavity 302 to obtain the temperature of the heating element 21.

[0122] The temperature sensor 90 can be fixed on the side wall gap 66 of the heat insulation support 60 close to the heating element 21 by means of the gap 54 of the limiting support 50 through adhesive or laser welding. It can be understood that the limiting support 50 and the heating element 21 are metal materials, and since the metal material has a high heat conduction speed, this position can better reflect the temperature level of the heating area.

[0123] It can be understood that the alternating current excited by the electromagnetic coil 10 is used to drive the heating element 21 to generate heat, and then heat the surrounding air. 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 substrate to promote the generation of aerosol. Further, the excess heat generated by the heating element is transmitted to the proximal end of the containing cavity 301 through the efficient heat conduction support 30, thereby constructing a temperature field. It is worth noting that the peripheral temperature of the temperature field is carefully controlled within a range of usually not more than 200°C, which although fails to meet the stringent requirements of direct peripheral heating, is sufficient to provide a basic and stable heat preservation effect to the aerosol-forming substrate.

[0124] When the suction action occurs, the hot air flow can effectively carry and release the smoke; and in the non-suction state, the additional heat generated by the heating element 21 and the electromagnetic coil 10 can be effectively conducted out and form a heat preservation layer on the periphery of the containing cavity 301, thanks to the excellent heat conduction performance of the heat conduction support 30 made of metal material and the structure that the containing cavity 301 is connected with the heating cavity 302. This design not only ingeniously combines the dual advantages of electromagnetic heating and airflow heating, but also significantly improves the energy utilization efficiency, while avoiding the potential defects of the two, thereby realizing a device with more uniform heating and better aerosol generation effect, and bringing a better user experience.

[0125] The terms and expressions herein have been chosen to describe the application, which should not be limited to these terms and expressions. The use of these terms and expressions does not mean to exclude any equivalent features described (or part thereof) and it should be recognized that various modifications can exist within the scope of the claims. Other modifications, changes and replacements can also exist. Accordingly, the claims should be considered to cover all these equivalents.

[0126] Similarly, it should be noted that although the present application has been described with reference to the current specific embodiments, those skilled in the art should recognize that the above embodiments are only used to illustrate the present application, and various equivalent changes or replacements can be made without departing from the spirit of the present application, therefore, any changes, modifications of the above embodiments within the scope of the spirit of the present application will fall within the scope of the claims of the present application.

Claims

1. An aerosol generating apparatus, the aerosol generating apparatus comprising: The housing, heating assembly, and fixing assembly, wherein the heating assembly includes a heating element for heating an aerosol forming matrix to generate an aerosol, and the fixing assembly fixes the heating assembly within the housing, characterized in that the heating assembly further includes: An electromagnetic coil is used to generate a changing magnetic field that causes the heating element to generate heat induction. The aerosol generating device has an internal containment cavity and a heating cavity. The heating element in the heating cavity heats the external air to form a heated airflow. The containment cavity contains at least a portion of the aerosol forming matrix. The heated airflow flows from the far end of the heating cavity to the near end of the containment cavity to heat the aerosol forming matrix to generate aerosol.

2. The aerosol generating apparatus according to claim 1, characterized in that, The heating assembly further includes a heat-conducting bracket, the proximal end of which forms the receiving cavity, and the distal end of which forms the heating cavity; a limiting member is provided between the receiving cavity and the heating cavity, and the heating element is isolated from the aerosol matrix by the limiting member; the limiting member includes a ventilated mesh.

3. The aerosol generating apparatus according to claim 1, characterized in that, The heating assembly further includes a heat-conducting bracket, the proximal end of which forms the receiving cavity, and the distal end of which forms the heating cavity; a first portion of the electromagnetic coil is disposed around the bottom of the receiving cavity, and a second portion of the electromagnetic coil is disposed around the heating cavity; the heat-conducting bracket further includes a limiting member disposed on the bottom outer side of the receiving cavity and the bottom outer side of the heating cavity, for limiting the electromagnetic coil from winding 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 limiting member is provided with a threading notch, and the electromagnetic coil is disposed in the limiting member through the threading notch.

4. The aerosol generating apparatus according to claim 3, characterized in that, The aerosol generating device further includes: An insulation layer is disposed on the outside of the heat-conducting bracket to enclose the receiving cavity and the heating cavity; A magnetic shielding layer is disposed on the outside of the insulation layer to provide magnetic shielding for the electromagnetic coil.

5. The aerosol generating apparatus according to claim 1, characterized in that, The heating element includes multiple parallel tubular components that are compactly connected, and the heating gas flows from the gaps between the tubular components to the aerosol-forming matrix.

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

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

8. The aerosol generating apparatus according to claim 1, characterized in that, The heating assembly also includes: A limiting bracket is disposed at the bottom of the heating chamber to restrict the heating element within the heating chamber. The limiting bracket is provided with a third air guide position, through which external air flows to the heating chamber.

9. The aerosol generating apparatus according to claim 8, characterized in that, The surface of the limiting bracket near the heating element is uneven.

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

11. The aerosol generating apparatus according to claim 8, characterized in that, The heating assembly further includes: a heat insulation bracket, the heat insulation bracket having a boss, the boss having a tapered vent hole along its own axis, the maximum radial hole of the tapered vent hole being closer to the heating cavity than the minimum radial hole; and a third portion of the electromagnetic coil at least surrounds at least a portion of the heat insulation bracket.

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

13. The aerosol generating apparatus according to claim 1, characterized in that, The housing includes: An upper outer support is fixed to the upper end of the receiving cavity and is used to provide an inlet for placing the aerosol forming matrix; The lower outer bracket is fixed to the lower end of the heating chamber and is provided with air holes for 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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