Heating assembly and aerosol generating device

Abstract

The utility model provides a heating assembly and an aerosol generating device, and the heating assembly comprises a tubular body which is provided with a containing cavity for containing an aerosol generating product in a limited manner, and the first end of the tubular body is provided with an opening so as to provide an inlet for the aerosol generating product to enter the containing cavity; a heating element for heating the aerosol-generating article to generate an aerosol; the conductive pin is electrically connected with the heating element; wherein the tubular body comprises a first tubular body and a second tubular body surrounding the first tubular body, a gap in a vacuum state is kept between the first tubular body and the second tubular body, the heating element is arranged in the gap, the conductive lead extends out of the tubular body from the gap, and the conductive pin comprises a sheet-shaped section at least partially extending into the tubular body. In the width direction of the sheet-shaped section, the thickness of the middle area of the sheet-shaped section is larger than that of the areas on the two sides of the sheet-shaped section. Through the mode, the sealing quality of the conductive pin and the tubular body during high-temperature fusion sealing can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of aerosol generating technology, in particular to a heating assembly and an aerosol generating device. BACKGROUND

[0002] An aerosol generating device generally comprises a receiving chamber for receiving an aerosol generating article (e.g. a cigarette) and a heating assembly for heating and baking the aerosol generating article received in the receiving chamber to volatilize at least part of the active ingredients in the aerosol generating article to generate an aerosol (smoke) to replace the smoke generated by burning a traditional cigarette.

[0003] The existing heating assembly comprises a tubular body for accommodating the aerosol generating article, wherein the tubular body comprises a first tubular body and a second tubular body surrounding the first tubular body, an enclosed gap is maintained between the first tubular body and the second tubular body, and a heating element for heating the aerosol generating article to generate an aerosol is arranged in the gap.

[0004] In order to improve the heat insulation effect of the heating assembly, the gap between the first tubular body and the second tubular body needs to be kept in vacuum as much as possible, and the conductive lead of the heating element needs to extend through the tubular body to the outside of the gap to be electrically connected to a voltage source. During the extension, the seal needs to be maintained to avoid external air entering the above-mentioned gap through the gap between the conductive lead and the tubular body, thereby affecting the vacuum effect of the above-mentioned gap. UTILITY MODEL CONTENT

[0005] The present application provides a heating assembly and an aerosol generating device with the same to better seal the gap between the conductive lead and the tubular body.

[0006] At least one embodiment of the present application provides a heating assembly, comprising:

[0007] a tubular body having a first end and a second end oppositely arranged along the length direction thereof, and a receiving chamber extending between the first end and the second end, the receiving chamber being configured to receive an aerosol generating article, and the first end being open to provide an entrance for the aerosol generating article to enter the receiving chamber;

[0008] a heating element configured to heat the aerosol generating article to generate an aerosol;

[0009] a conductive lead electrically connected to the heating element;

[0010] The tubular body includes a first tubular body and a second tubular body surrounding the first tubular body, a gap in a vacuum state is maintained between the first tubular body and the second tubular body, the heating element is arranged in the gap, the conductive lead extends out of the tubular body from the gap, the conductive lead includes a sheet-shaped section extending at least partially in the tubular body, and along a width direction of the sheet-shaped section, a thickness of a middle region of the sheet-shaped section is greater than thicknesses of two side regions of the sheet-shaped section.

[0011] In one of the embodiments, the heating element is configured to emit light in a heating state, thereby generating heat radiation that can be absorbed by the aerosol generating article to generate heat.

[0012] In one of the embodiments, the heating element includes a tungsten wire.

[0013] In one of the embodiments, the heating element is configured in a double helix shape and surrounds the first tubular body.

[0014] In one of the embodiments, a material of the tubular body is quartz glass, and a material of the sheet-shaped section is metal molybdenum.

[0015] In one of the embodiments, the middle region of the sheet-shaped section has a thickness of 30 μm to 100 μm, and the edge region of the sheet-shaped section has a thickness of 5 μm to 30 μm.

[0016] In one of the embodiments, a ratio of the width to the thickness of the sheet-shaped section is between 100 and 110.

[0017] In one of the embodiments, the tubular body further includes a first protrusion extending from an end surface of the second end away from the accommodation chamber, and the sheet-shaped section extends at least partially in the first protrusion.

[0018] In one of the embodiments, the second end seal is configured to provide support to the aerosol generating article.

[0019] In one of the embodiments, the first protrusion includes a first plane and a second plane disposed opposite to each other, and an arc surface connected between the first plane and the second plane; or,

[0020] The first protrusion includes a first arc surface and a second arc surface disposed opposite to each other, and a plane connected between the first arc surface and the second arc surface.

[0021] In one of the embodiments, the first protrusion is hollow to define an airflow passage in communication with the accommodation chamber.

[0022] At least one embodiment of this application also provides an aerosol generating device, including a battery cell and a heating component as described in the above embodiments, wherein the battery cell provides electrical energy to the heating component.

[0023] The heating component provided in the above embodiments, by setting a thin sheet-like section on the conductive pin, and the thickness of the middle region of the sheet-like section being greater than the thickness of its two sides, can fully release stress when the sheet-like section and the tubular body are fused together at high temperature. On the other hand, it can improve the wettability of the tubular body and the surface of the sheet-like section in the molten state, thereby improving the sealing quality when the sheet-like section and the tubular body are fused together at high temperature, effectively avoiding the formation of gaps after the sheet-like section and the tubular body are fused together, and thus effectively maintaining the vacuum state in the gap. Attached Figure Description

[0024] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0025] Figure 1 This is a perspective view of a heating component according to one embodiment of this application in one direction;

[0026] Figure 2 for Figure 1 A cross-sectional schematic diagram of the heating element;

[0027] Figure 3 for Figure 1 Another cross-sectional view of the heating element;

[0028] Figure 4 for Figure 3 Schematic diagram of the structure of the medium-sized sheet-like segment;

[0029] Figure 5 for Figure 1 A three-dimensional schematic diagram of the heating element from another direction;

[0030] Figure 6 For preparation Figure 5 A schematic diagram showing the fit between the fixture and the tubular body of the heating element;

[0031] Figure 7 A perspective view of a heating component in one direction, provided for another embodiment of this application;

[0032] Figure 8 For preparation Figure 7 A schematic diagram showing the fit between the fixture and the tubular body of the heating element;

[0033] Figure 9A perspective view of the heating assembly in one direction according to another embodiment of the present application is shown in FIG. 1A.

[0034] Figure 10 A perspective view of the heating assembly in one direction according to another embodiment of the present application is shown in FIG. 1A. Figure 9 A perspective view of the heating assembly in one direction according to another embodiment of the present application is shown in FIG. 1A.

[0035] Figure 11 A perspective view of the heating assembly in one direction according to another embodiment of the present application is shown in FIG. 1A. Figure 3 A perspective view of the heating assembly in one direction according to another embodiment of the present application is shown in FIG. 1A.

[0036] Figure 12 A perspective view of the heating assembly in one direction according to another embodiment of the present application is shown in FIG. 1A. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort fall within the scope of protection of the present application.

[0038] The terms "first", "second", "third" in the present application are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number or order of the indicated technical features. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship or movement condition between components, and if the specific posture changes, the directional indications also change accordingly. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0039] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification is not necessarily all referring to the same embodiment, nor is it necessarily referring to a particular alternative embodiment. It will be explicitly understood by a person of ordinary skill in the art that the embodiments described herein can be combined with other embodiments.

[0040] It is to be understood that where an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. Where an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can also be present. As used herein the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0041] An embodiment of the present application provides a heating assembly 100, as shown in Figure 1 and Figure 2 The heating assembly 100 comprises a tubular body 10 having a first end 11 and a second end 12 oppositely arranged along a length direction of the tubular body 10, and a receiving chamber 13 extending between the first end 11 and the second end 12, the receiving chamber 13 being configured to receive an aerosol generating article 200. The shape of the tubular body 10 is preferably cylindrical to match the shape of the aerosol generating article 200.

[0042] The tubular body 10 comprises a first tubular body 14 and a second tubular body 15 surrounding the first tubular body 14, that is, the second tubular body 15 is sleeved on the first tubular body 14, and the receiving chamber 13 is defined by a hollow region of the first tubular body 14, and the first end 11 is open to improve the entry of the aerosol generating article 200 into the receiving chamber 13.

[0043] A gap 16 is maintained between the first tubular body 14 and the second tubular body 15, and the heating assembly 100 further comprises a heating element 17 arranged in the gap 16, the heating element 17 being configured to heat the aerosol generating article 200 to volatilize at least part of active substances inside the aerosol generating article 200 to generate aerosol, which can be inhaled by a user through suction on the aerosol generating article 200. The heat generated by the heating element 17 can be transferred to the aerosol generating article 200 by heat conduction or heat radiation, and the heating element 17 can be made of a material having a TCR effect, such as stainless steel, tungsten wire, nickel-chromium, etc. The TCR effect refers to the property that the resistance value of the heating element 17 changes with temperature, and thus the temperature of the heating element 17 can be controlled through the TCR effect.

[0044] Alternatively, the heating wire 171 can also be made of a material such as iron-chromium-aluminum that does not have a TCR effect, in which case an additional temperature measuring element (PT1000, thermocouple, etc.) is needed to control the temperature of the heating element 17.

[0045] In some preferred embodiments, the heating element 17 is configured to emit light in a heating state, and the light can generate heat radiation which can be absorbed by the aerosol generating article 200 to generate heat. Since the heat radiation is usually in the form of visible light or infrared light, the aerosol generating article 200 can be heated without contact, and the generation of metal and ceramic odors and heavy metal migration during contact heating can be avoided.

[0046] In some preferred embodiments, the heating element 17 is a tungsten wire. When the tungsten wire is electrified, it can generate heat and light, and effectively generate infrared light. The infrared light can pass through the first tubular body 14 and be absorbed by the aerosol generating article 200 in the first tubular body 14 to generate heat. In other embodiments, the heating element 17 can also be made of nickel-chromium, iron-chromium-aluminum, or other materials. The heating element 17 made of these materials can also emit light and generate infrared light when heated.

[0047] It should be noted that the tubular body 10 needs to be made of a light-transmitting material at this time. Different materials have different transmittances for different wavelengths of infrared light. Alternatively, the tubular body 10 can be made of at least one single crystal or polycrystalline light-transmitting material selected from diamond, spinel, quartz glass, zinc selenide, gallium arsenide, gallium phosphide, zinc selenide, zinc sulfide, and magnesium fluoride. The diamond structure has the advantages of high transmittance and wide transmission band. The infrared optical material of the tubular body 10 can be a single crystal, for example, the material of the tubular body 10 is quartz glass. The quartz glass tubular body 10 can withstand a temperature of 1000°C or higher, and the infrared transmittance can be 90% or higher.

[0048] According to the wavelength of infrared light, the infrared spectrum is usually divided into three regions: near-infrared region (0.75 μm-2.5 μm), mid-infrared region (2.5 μm-25 μm), and far-infrared region (25 μm-1000 μm). The transmittance of the infrared optical material of the heating assembly 100 for infrared light in the mid-infrared region of 2.5 μm-25 μm is ≥90%, and the main infrared light absorption band of the aerosol generating article 200 is 3 μm-14 μm. Therefore, the aerosol generating article can be heated by the infrared light of the heating assembly 100.

[0049] The gap 16 is closed to maintain the vacuum state of the gap 16. In actual production, the first end 11 and the second end 12 of the gap 16 can be closed, and then a small hole (not shown) can be provided on the side or top surface of the tubular body 10. A glass tube is inserted into the gap 16 through the small hole, and the glass tube is connected to a vacuum instrument. Thus, the gap 16 can be vacuumed by the vacuum instrument.

[0050] Setting gap 16 to a vacuum state allows the heating element 17 to be in a vacuum environment. The heating element 17 heats up rapidly after being energized, and it is less prone to oxidation even after prolonged use in a vacuum environment. Furthermore, the vacuum environment of gap 16 also provides insulation, preventing heat loss from the heating element and improving the heating efficiency of the heating assembly 100. Additionally, when the heating element 17 heats the aerosol-generating product 200 using thermal radiation, the vacuum state also enhances the efficiency of the infrared radiation generated by the heating element 17.

[0051] Furthermore, after the gap 16 is evacuated to a vacuum state, inert gas can be filled into the gap 16 through the glass tube mentioned above. By filling with a suitable inert gas, the efficiency of the heating element 17 in emitting infrared rays can be further improved.

[0052] like Figure 2 As shown, the heating component 100 also includes a conductive pin 18 that is electrically connected to the heating element 17. Since the gap 16 is closed, the conductive pin 18 needs to pass through the tubular body 10 to extend out of the tubular body 10 from the gap 16, and then be electrically connected to the power supply component to conduct the electrical energy provided by the power supply component to the heating element 17.

[0053] like Figure 3 As shown, the conductive pin 18 includes a sheet-like segment 181 located at least partially within the tubular body 10. The coefficient of thermal expansion of the sheet-like segment 181 is substantially the same as that of the tubular body 10, so as to seal the gap between the conductive pin 18 and the tubular body 10 and prevent external air from entering the gap 16 through the gap, thereby affecting the vacuum state of the gap 16.

[0054] In the specific fabrication of the heating element 100, the first ends 11 of the first tubular body 14 and the second tubular body 15 are first joined together using a high-temperature flame torch. The first tubular body 14 and the second tubular body 15 are selected to have relatively thin walls. Since the first tubular body 14 and the second tubular body 15 will absorb some heat when the heating element 17 generates infrared radiation, the first tubular body 14 and the second tubular body 15 are selected to have relatively thin walls, preferably 0.1-0.5 mm, while ensuring a certain strength.

[0055] Then, the prepared heating element 17 is inserted from the second end 12 into the gap 16 between the first tubular body 14 and the second tubular body 15. The second ends 12 of the first tubular body 14 and the second tubular body 15 are then sealed at high temperature, so that the second ends 12 of the first tubular body 14 and the second tubular body 15 are connected to each other. In this way, the gap 16 can be sealed.

[0056] Finally, the gap 16 is evacuated through the glass tube. After evacuation, the glass tube is removed, and the small hole through which the glass tube passes is melted and sealed with a flame gun (flame gun temperature > 2000℃). Thus, a heating element 100 can be prepared through the above steps.

[0057] The conductive pin 18 extends from the second end 12 into the tubular body 10. Therefore, when the second ends 12 of the first tubular body 14 and the second tubular body 15 are sealed at high temperature, if the thermal expansion coefficients of the conductive pin 18 and the tubular body 10 are significantly different, it will be difficult to ensure the sealing of the gap between the conductive pin 18 and the tubular body 10 due to the thermal expansion during the high-temperature sealing process.

[0058] If a sheet-like segment 181 with an expansion coefficient close to that of the tubular body 10 is provided in the conductive pin 18, the sheet-like segment 181 and the tubular body 10 can have approximately the same deformation during the high-temperature sealing process, thereby effectively sealing the conductive pin 18 and the tubular body 10, preventing gaps from appearing between the conductive pin 18 and the tubular body 10, and keeping the gap 16 in a vacuum state.

[0059] Furthermore, because the sheet-like section 181 is relatively thin, the stress during the sealing of the conductive pin 18 and the tubular body 10 can be fully released, resulting in a better sealing effect. Also, as... Figure 4 As shown, along the width direction of the sheet-like segment 181, that is... Figure 4 In the direction indicated by the X arrow, the thickness of the middle region 1811 (dashed box region) of the sheet-like section 181 is greater than the thickness of the two side regions 1812, in order to improve the wettability between the tubular body 10 and the surface of the sheet-like section 181 in the molten state. The better the wettability, the greater the adhesion and the better the sealing quality.

[0060] In some embodiments, the tubular body 10 is made of quartz glass, while the sheet segment 181 is made of molybdenum metal, thereby achieving a better match between the expansion coefficient of the tubular body 10 and the expansion coefficient of the sheet segment 181, so as to improve the sealing quality between the tubular body 10 and the conductive pin 18 during high-temperature sealing.

[0061] Furthermore, in some embodiments, when the tubular body 10 is made of quartz glass and the sheet segment 181 is made of molybdenum, in order to further improve the sealing quality between the conductive pin 18 and the tubular body 10, the middle region of the sheet segment has a thickness of 30 μm to 100 μm, and the edge region of the sheet segment has a thickness of 5 μm to 30 μm.

[0062] In some embodiments, the ratio of the width to the thickness of the sheet-shaped section 181 also affects the sealing quality between the conductive pin 18 and the tubular body 10. When the tubular body 10 is made of quartz glass and the sheet-shaped section 181 is made of molybdenum, to further improve the sealing quality between the conductive pin 18 and the tubular body 10, the ratio of the width to the thickness of the sheet-shaped section 181 is preferably between 100 and 110. In addition, it should be noted that the expansion coefficients of molybdenum and quartz glass are similar, and a seal is easily formed at the contact position between molybdenum and quartz glass when the end of the tubular body 10 is sealed, thereby ensuring that the gap between the first tubular body and the second tubular body remains in a vacuum state.

[0063] In some embodiments, as shown in Figure 5 , the conductive pin 18 extends from the second end 12 of the tubular body 10, and the second end 12 is sealed to form a support surface 121. When the aerosol generating article 200 is received in the receiving chamber 13, the support surface 121 can support the aerosol generating article 200, thereby limiting the depth to which the aerosol generating article 200 is inserted into the receiving chamber 13. Since the conductive pin 18 extends from the second end 12 of the tubular body 10, the conductive pin 18 and the tubular body 10 are sealed at the same time when the second end 12 is sealed, thereby reducing the production process.

[0064] As a specific embodiment, as shown in Figure 6 , a first jig 110a and a second jig 120a used to seal the second end 12 are shown in Figure 6 . The first jig 110a and the second jig 120a are square-shaped. When the second end 12 is sealed, the first jig 110a and the second jig 120a are placed on both sides of the first tubular body 14 and the second tubular body 15, and then the first tubular body 14 and the second tubular body 15 are heated to a molten state. The first jig 110a and the second jig 120a are then controlled to move towards each other to press and seal the first tubular body 14 and the second tubular body 15, thereby completing the sealing operation of the second end 12.

[0065] As shown in Figure 5 , the sealing operation described above forms a first protruding portion 122a on the end surface of the second end 12, which extends away from the receiving chamber 13. Since the first jig 110a and the second jig 120a are square-shaped, the first protruding portion 122a includes a first flat surface 1221a and a second flat surface 1222a arranged opposite to each other, and an arc surface 1223a connecting the first flat surface 1221a and the second flat surface 1222a.

[0066] As another specific embodiment, as shown in Figure 8 and Figure 9 ,Figure 8 and Figure 9 The first fixture 110b and the second fixture 120b used for sealing the second end 12, and the sealing member 130b placed on the first tubular body 14 are shown. The first fixture 110b and the second fixture 120b are arc-shaped, and the sealing member 130b and the tubular body 10 are made of the same material, for example, quartz glass.

[0067] In the sealing process of the second end 12, the tubular body 10 and the sealing member 130b are first sintered together by a sintering process, so that the sealing member 130b seals the port of the second end 12. Then, the first fixture 110b and the second fixture 120b are controlled to move close to each other and press the first tubular body 14 and the second tubular body 15 in a molten state, so as to clamp the first tubular body 14 and the second tubular body 15, thereby realizing the sealing operation of the second end 12.

[0068] As shown in Figure 7 , the above sealing operation forms a first protruding portion 122b on the end face of the second end 12, which extends away from the accommodation chamber 13. Since the cross-sectional shape of the first fixture 110b and the second fixture 120b is arc-shaped, the first protruding portion 122b includes a first arc face 1221b and a second arc face 1222b arranged opposite to each other, and a flat face 1223b connecting the first arc face 1221b and the second arc face 1222b.

[0069] In some embodiments, as shown in Figure 10 , Figure 10 The first fixture 110c, the second fixture 120c and the third fixture 130c used for clamping the first tubular body 14 and the second tubular body 15 are shown. The cross-sectional shape of the first fixture 110c and the second fixture 120c is arc-shaped, and the third fixture 130c includes a base 131c and a second protruding portion 132c protruding from the outer surface of the base 131c, which extends into the first tubular body 14. In the clamping process, the first tubular body 14 and the second tubular body 15 are first heated to a molten state, and then the first fixture 110c and the second fixture 120c are controlled to move close to each other and press the first tubular body 14 and the second tubular body 15, so as to clamp the first tubular body 14 and the second tubular body 15, thereby closing the gap 16. After the first tubular body 14 and the second tubular body 15 are clamped, the third fixture 130c is removed.

[0070] As shown in Figure 9As shown, the sealing operation described above also forms a first protrusion 122c extending away from the accommodation chamber 13 at the end face of the second end 12. Since the third jig 130c is removed after the first tubular body 14 and the second tubular body 15 are clamped and sealed, the first protrusion 122c is hollowly arranged, and the hollow region 1221c of the first protrusion 122c is in communication with the accommodation chamber 13. The hollow region 1221c can serve as an airflow passage for external air to enter the accommodation chamber 13 through the opening of the second end 12, and the air can further enter the aerosol generating article 200 to carry the aerosol generated in the aerosol generating article 200 to escape when a user sucks on the aerosol generating article 200.

[0071] Based on the sealing method provided in the above embodiment, it can be easily understood that the shape of the clamping jig is different, and the shape of the first protrusion is also different. However, based on the clamping idea provided in the above embodiment, a first protrusion extending away from the accommodation chamber 13 is formed.

[0072] In addition, as shown in Figure 5 , Figure 7 , Figure 9 , the conductive pin 18 extends through the first protrusion to the outside of the tubular body 10, so that the sheet-shaped section 181 extends at least partially in the first protrusion, and the sheet-shaped section 181 can be sealed with the first protrusion when the first tubular body 14 and the second tubular body 15 are clamped and sealed.

[0073] In some embodiments, as shown in Figure 5 , Figure 7 , Figure 9 and Figure 11 , the heating element 17 is configured in a double helix shape and surrounds the first tubular body 14, so that both conductive pins 18 can extend out of the second end 12, facilitating packaging.

[0074] One embodiment of the present application also provides an aerosol generating device 300, as shown in Figure 12 , the aerosol generating device 300 comprises:

[0075] a housing defining an outer surface of the aerosol generating device 100, having a proximal end 310 and a distal end 320 opposite along a length direction; in use, the proximal end 310 is closer to a user for facilitating operation of accommodating an aerosol generating article and sucking; and the distal end 320 is away from the user.

[0076] In some examples, the housing can be formed of a metal or an alloy, such as stainless steel, aluminum, or the like. Other suitable materials include various plastics (e.g., polycarbonate), metal-plating over plastic, ceramics, and the like.

[0077] The housing further has a receiving chamber 330 for receiving the heating assembly 100 in the above-described embodiments, and the aerosol generating article 200 can be received into the receiving chamber 13 of the heating assembly 100 in the extending direction of the receiving chamber 330, and when the aerosol generating article 200 is received in the aerosol generating device 300, it is advantageous for the user to smoke the part of the aerosol generating article 200 exposed outside the aerosol generating device 300, such as the filter.

[0078] In alternative embodiments, the aerosol generating article 200 preferably employs a tobacco-containing material that releases volatile compounds from a substrate upon heating; or can also be a non-tobacco material suitable for electrically heated smoking. The aerosol generating article preferably employs a solid substrate, which can include one or more of a powder, granules, shreds, strips, or a sheet of one or more of a tobacco leaf, a tobacco leaf, homogenized tobacco, or expanded tobacco; or the solid substrate can contain additional volatile flavor compounds, either tobacco or non-tobacco, to be released upon heating of the substrate.

[0079] The aerosol generating device 300 further includes an electric cell 340 and a main board 350, and the electrically conductive pin 18 of the heating element 17 and the electric cell 340 are both electrically connected to the main board 350, and the main board 350 is provided with a controller of the aerosol generating device 300, and the controller can control the electric cell 340 to provide electric energy to the heating element 17. The electric cell 340 can be, but is not limited to, a lithium iron phosphate (LiFePO4) cell. For example, the electric cell 340 can be a lithium cobaltate (LiCoO2) cell or a lithium titanate cell.

[0080] It should be noted that the specification and drawings of the present application give the preferred embodiments of the present application, but are not limited to the embodiments described in the specification, and further, for those skilled in the art, the above description can be improved or changed, and all these improvements and changes should belong to the protection scope of the claims of the present application.

Claims

1. A heating element, characterized in that, include: A tubular body having a first end and a second end disposed opposite to each other along its length, and a receiving chamber extending between the first end and the second end for receiving an aerosol-generating article, the first end being open to provide an entrance for the aerosol-generating article to enter the receiving chamber; Heating element, used to heat aerosol-generating products to produce aerosols; The conductive pin is electrically connected to the heating element; The tubular body includes a first tubular body and a second tubular body surrounding the first tubular body. A vacuum-state gap is maintained between the first tubular body and the second tubular body. The heating element is disposed in the gap. The conductive pin extends out of the tubular body from the gap. The conductive pin includes a sheet-like segment that extends at least partially into the tubular body. Along the width direction of the sheet-like segment, the thickness of the middle region of the sheet-like segment is greater than the thickness of the side regions of the sheet-like segment.

2. The heating component according to claim 1, characterized in that, The heating element is configured to emit light when heated, thereby generating thermal radiation that can be absorbed by the aerosol-generating product and generate heat.

3. The heating component according to claim 2, characterized in that, The heating element includes a tungsten filament.

4. The heating component according to claim 1, characterized in that, The heating element is configured in a double helix shape and surrounds the first tubular body.

5. The heating component according to claim 1, characterized in that, The tubular body is made of quartz glass, and the sheet-like section is made of molybdenum.

6. The heating component according to claim 5, characterized in that, The middle region of the sheet-like segment has a thickness of 30μm to 100μm, and the edge region of the sheet-like segment has a thickness of 5μm to 30μm.

7. The heating component according to claim 5, characterized in that, The ratio of the width to the thickness of the sheet-like segment is between 100 and 110.

8. The heating component according to claim 1, characterized in that, The tubular body further includes a first protrusion extending from the end face of the second end away from the receiving chamber, and the sheet-like segment extends at least partially in the first protrusion.

9. The heating element according to claim 8, characterized in that, The second end seal is provided to provide support for the aerosol-generated article.

10. The heating component according to claim 9, characterized in that, The first protrusion includes a first plane and a second plane disposed opposite to each other, and an arc surface connecting the first plane and the second plane; or, The first protrusion includes a first arc surface and a second arc surface disposed opposite to each other, and a plane connecting the first arc surface and the second arc surface.

11. The heating component according to claim 8, characterized in that, The first protrusion is hollow to define an airflow passage communicating with the receiving chamber.

12. An aerosol generating device, characterized in that, It includes a battery cell and a heating element as described in any one of claims 1-11, wherein the battery cell provides electrical energy to the heating element.

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