Heating body assembly and aerosol generating device

Abstract

The invention relates to the technical field of aerosol generation, and provides a heating body assembly and an aerosol generation device.The heating body assembly comprises a heating body and a bottom sealing piece, a heating cavity is formed in the heating body, the top end and the bottom end of the heating body are each provided with an opening communicating with the heating cavity, and the heating cavity is used for containing an aerosol generation product; the bottom sealing piece seals the bottom end opening of the heating body, a supporting table is formed on the inner bottom face of the bottom sealing piece, and the top surface of the supporting table is used for abutting against the aerosol generating product. The supporting table can support the bottom surface of the aerosol generating product, such as the bottom surface of an aerosol generating substrate, so that an airflow space is formed between the inner bottom surface of the bottom sealing piece and the bottom surface of the aerosol generating product, and the bottom surface of the aerosol generating product is prevented from being attached to the inner bottom surface of the bottom sealing piece; and the suction resistance of the aerosol generating product in the suction process is too large.

Description

Technical Field

[0001] The present application relates to the technical field of aerosol generation, and in particular to a heating element assembly and an aerosol generating device. Background Art

[0002] This section is intended to provide a background or context for the embodiments of the present application. No description herein is admitted to be prior art by virtue of its inclusion in this section.

[0003] The aerosol generating product is used in conjunction with an aerosol generating device having a heating element. The aerosol generating product includes an aerosol generating substrate. The aerosol generating substrate is heated by the heating element so that the aerosol generating substrate is heated just to a degree sufficient to emit an aerosol. The aerosol generating substrate will not burn. When in use, the aerosol generating substrate is released by heating the aerosol generating substrate.

[0004] In the related art, a user inhales an aerosol generating product to obtain an aerosol, and the aerosol generating device has a relatively large inhalation resistance during the process of heating an aerosol generating substrate to generate an aerosol. Summary of the invention

[0005] In view of this, the embodiments of the present application hope to provide a heating element assembly and an aerosol generating device capable of reducing suction resistance.

[0006] To achieve the above objectives, the present application provides a heating element assembly, including:

[0007] A heating element, wherein the heating element is formed with a heating cavity, and both ends of the top and bottom of the heating element have openings communicating with the heating cavity, and the heating cavity is used to accommodate the aerosol generating product;

[0008] A bottom cover member is provided to seal the bottom opening of the heating element, and a support platform is formed on the inner bottom surface of the bottom cover member, wherein the top surface of the support platform is used to abut against the aerosol generating product.

[0009] In some embodiments, there are multiple support platforms, and the multiple support platforms are distributed at intervals along the circumferential direction or along the radial direction.

[0010] In some embodiments, the number of the support platforms is no less than 3.

[0011] In some embodiments, the height between the top surface of the support platform and the inner bottom surface of the bottom cover is not higher than 0.5 mm.

[0012] In some embodiments, the inner bottom surface of the bottom cover includes a first portion and a second portion, the first portion protrudes toward the bottom side to form a sink, and the second portion is formed with the support platform.

[0013] In some embodiments, the support platform is located radially outside the sink; and / or,

[0014] The sink is located in the central area of ​​the bottom cover.

[0015] In some embodiments, the depth of the sink along the top and bottom directions is 1 mm to 5 mm; and / or,

[0016] The hydraulic diameter of the sink is 4 mm to 6.5 mm.

[0017] In some embodiments, the bottom cover comprises a bottom shell, the bottom shell closes the bottom opening of the heating element, and the inner bottom surface of the bottom shell is the inner bottom surface of the bottom cover.

[0018] In some embodiments, the bottom cover includes a bottom shell and a heat absorber, the bottom shell closes the bottom opening of the heating element, the heat absorber is arranged in the bottom shell, and the top surface of the heat absorber is the inner bottom surface of the bottom cover.

[0019] In some embodiments, a circumferential surface of the bottom cover is formed with a protrusion, and the protrusion is used to abut against the outer circumferential surface of the aerosol generating article.

[0020] In some embodiments, there are multiple protrusions, and the multiple protrusions are distributed at intervals along the circumferential direction.

[0021] In some embodiments, the bottom cover includes a base and an annular portion with openings at both ends, the top of the annular portion is connected to the bottom end of the heating element, and the base closes the bottom opening of the annular portion.

[0022] In some embodiments, the heating element assembly includes a heat insulating shell and a hanging piece, the hanging piece is connected to the top of the heating element, the heat insulating shell includes a platform and a shell with a accommodating cavity, the platform is arranged on the circumferential surface of the accommodating cavity, the hanging piece is connected to the platform, so that the heating element and the bottom cover are suspended in the accommodating cavity.

[0023] An embodiment of the present application also provides an aerosol generating device, comprising any one of the heating element components described above.

[0024] The heating element assembly provided in the embodiment of the present application, on the one hand, the bottom cover seals the bottom opening of the heating element, so that the bottom cover and the heating element together constitute a structure with only the top opening, thus limiting the unidirectional flow of the aerosol generated by the aerosol generating matrix from bottom to top, reducing the dissipation of the aerosol. On the other hand, the support platform can support the bottom surface of the aerosol generating product, such as the bottom surface of the aerosol generating matrix, so that an airflow space is formed between the inner bottom surface of the bottom cover and the bottom surface of the aerosol generating product. Exemplarily, an airflow space is formed between the inner bottom surface of the bottom cover and the bottom surface of the aerosol generating matrix, so that the bottom surface of the aerosol generating product, such as the bottom surface of the aerosol generating matrix, is prevented from being attached to the inner bottom surface of the bottom cover, resulting in excessive suction resistance during the suction process of the aerosol generating product. On the other hand, the bottom cover has no heating function, so it can avoid the bottom cover heating the aerosol retained in the airflow space to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the assembly of the heating element assembly and the aerosol generating product in one embodiment of the present application;

[0026] Figure 2 for Figure 1 A schematic diagram of the structure from another perspective of the structure shown;

[0027] Figure 3 for Figure 2 Sectional view in the AA direction;

[0028] Figure 4 for Figure 1 An exploded schematic diagram of the hanging member, the heating element and the first back cover member in the structure shown;

[0029] Figure 5 for Figure 4 A cross-sectional view of the first back cover shown;

[0030] Figure 6 This is a schematic structural diagram of a second back cover member in an embodiment of the present application;

[0031] Figure 7 for Figure 6 A schematic structural diagram of the second back cover member from another viewing angle;

[0032] Figure 8 This is a schematic structural diagram of a third back cover member in one embodiment of the present application;

[0033] Fig. 9 for Figure 6 A cross-sectional view of a second back cover is shown.

[0034] Description of Reference Numerals

[0035] Heating element 1; heating chamber 1a; bottom cover 2; support platform 2a; first part 2b; sink 2ba; second part 2c; protrusion 2d; bottom shell 21; heat absorbing element 22; base 201; annular portion 202; heat insulation shell 3; platform 31; limiting groove 31a; shell 32; accommodating chamber 32a; hanging element 4; connecting end 41; lap plate 42; folded edge 43; coil 5;

[0036] Aerosol-generating article 100; aerosol-generating substrate 110; airway 110a; functional section 120; filtering section 121; cooling section 122. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed description in the specific implementation mode should be understood as an explanation of the purpose of this application and should not be regarded as an improper limitation on this application. In this application, the unit "mm" is millimeter.

[0038] An embodiment of the present application provides an aerosol generating device, and the aerosol generating device includes a heating element assembly in any one of the embodiments of the present application.

[0039] Exemplarily, the aerosol generating device may be a portable aerosol generating device. The outline shape of the aerosol generating device may be roughly in the shape of a long strip, so that it is convenient for the user to hold the aerosol generating device with fingers.

[0040] Aerosol-generating articles are intended for use with an aerosol-generating device having a heating element. Figure 1 The aerosol generating device heats the aerosol generating product 100 through a heating element component.

[0041] See also Figure 3 The aerosol generating article 100 includes an aerosol generating substrate 110. The aerosol generating substrate 110 is used to be heated to generate an aerosol. Exemplarily, the aerosol generating substrate 110 can be suitable for generating an aerosol in a heating-not-burning manner. That is, the aerosol generating substrate 110 is heated to below the ignition point to generate an aerosol. The aerosol generating substrate 110 does not burn during the process of generating the aerosol.

[0042] The aerosol generating article 100 is used for a user to inhale the aerosol generated by the aerosol generating substrate 110. The top end of the aerosol generating article 100 faces the user, and when the user inhales the aerosol, the aerosol flows from the bottom side to the top side.

[0043] The aerosol-generating substrate 110 may be in a solid state.

[0044] For example, in some embodiments, please refer to Figures 1 to 3The aerosol generating article 100 includes a functional segment 120 and a wrapping layer, wherein the functional segment 120 is disposed on the top of the aerosol generating substrate 110, and the wrapping layer wraps around the periphery of the aerosol generating substrate 110 and the periphery of the functional segment 120. The wrapping layer can protect both the aerosol generating substrate 110 and the functional segment 120.

[0045] The functional segment 120 can provide at least one of the functions of aerosol gathering, dilution, cooling, interception and compensation.

[0046] See also Figures 1 to 3 The heating element assembly provided in the embodiment of the present application includes a heating element 1 and a bottom sealing member 2 .

[0047] See also Figure 3 to Figure 4 The heating element 1 is formed with a heating cavity 1a, and both ends of the top and bottom of the heating element 1 have openings connected to the heating cavity 1a. The heating cavity 1a is used to accommodate the aerosol generating product 100. For example, the heating cavity 1a is used to place the aerosol generating substrate 110 of the aerosol generating product 100. The heating element 1 can generate heat to heat the aerosol generating substrate 110. The aerosol generating product 100 can be inserted into the heating cavity 1a through the top opening of the heating element 1. The heat of the heating element 1 is transferred radially inward from the outer periphery of the aerosol generating substrate 110.

[0048] The bottom cover 2 closes the bottom opening of the heating element 1, and a support platform 2a is formed on the inner bottom surface of the bottom cover 2, and the top surface of the support platform 2a is used to abut the aerosol generating product 100. For example, the top surface of the support platform 2a is used to abut the aerosol generating substrate 110. The support platform 2a can support the bottom surface of the aerosol generating substrate 110, so that an airflow space is formed between the inner bottom surface of the bottom cover 2 and the bottom surface of the aerosol generating product 100. Exemplarily, the support platform 2a can support the bottom surface of the aerosol generating substrate 110, so that an airflow space is formed between the inner bottom surface of the bottom cover 2 and the bottom surface of the aerosol generating substrate 110.

[0049] It should be noted that the inner bottom surface of the bottom cover 2 refers to the surface of the bottom cover 2 facing the bottom surface of the aerosol generating article 100 , such as the aerosol generating substrate 110 .

[0050] The heating element 1 has a heating function, and the bottom cover 2 does not have a heating function. The heating function refers to the function of actively heating or stopping heating. For example, the heating element 1 can actively heat or stop heating. It is understandable that the heat of the heating element 1 may be conducted to the bottom cover 2, causing the temperature of the bottom cover 2 to rise. Heating the aerosol generating matrix 110 is passive heating, not active heating.

[0051] In the heating element assembly provided in the embodiment of the present application, on the one hand, the bottom cover 2 closes the bottom opening of the heating element 1, so that the bottom cover 2 and the heating element 1 together constitute a structure with only the top opening, thus limiting the unidirectional flow of the aerosol generated by the aerosol generating matrix 110 from the bottom to the top, reducing the dissipation of the aerosol. On the other hand, the support platform 2a can support the bottom surface of the aerosol generating product 100, such as the bottom surface of the aerosol generating matrix 110, so that an airflow space is formed between the inner bottom surface of the bottom cover 2 and the bottom surface of the aerosol generating product 100. Exemplarily, an airflow space is formed between the inner bottom surface of the bottom cover 2 and the bottom surface of the aerosol generating matrix 110, so that the bottom surface of the aerosol generating product 100, such as the bottom surface of the aerosol generating matrix 110, is prevented from being attached to the inner bottom surface of the bottom cover 2, causing the aerosol generating product 100 to have excessive suction resistance during the suction process. On the other hand, the bottom cover 2 has no heating function, so that the bottom cover 2 can be prevented from heating the aerosol retained in the airflow space to a certain extent.

[0052] Taking the plane perpendicular to the top and bottom directions as the cross section, the cross-sectional shape of the aerosol generating substrate 110 is not limited. For example, the cross-sectional contour shape of the aerosol generating substrate 110 is circular, elliptical, polygonal (including but not limited to triangle, square or prism, etc.), runway-shaped or irregular, etc., wherein the irregular refers to other symmetrical or asymmetrical shapes other than the shapes listed above. The cross-sectional shape of the aerosol generating substrate 110 is other regular shapes other than irregular shapes, and the product consistency is good, which is convenient for monitoring product quality.

[0053] The embodiment of the present application is described by taking the cross-sectional shape of the aerosol generating substrate 110 as a circle as an example, that is, the aerosol generating substrate 110 is a cylinder as a whole. The cross-sectional shape of the functional segment 120 is the same as the cross-sectional shape of the aerosol generating substrate 110, that is, the cross-sectional shape of the functional segment 120 is also a circle, so that the aerosol generating article 100 is a cylinder as a whole.

[0054] In one embodiment, please refer to Figures 4 to 8 The number of the supporting platforms 2a is plural. The plural supporting platforms 2a can support the aerosol generating substrate 110 from plural positions.

[0055] In one embodiment, please refer to Figures 4 to 8 , a plurality of support platforms 2a are distributed at intervals along the circumferential direction. In this way, each part of the aerosol generating substrate 110 along the circumferential direction can be supported by the support platform 2a.

[0056] In one embodiment, a plurality of support platforms 2a are spaced apart in the radial direction, so that each portion of the aerosol generating substrate 110 in the radial direction can be supported by the support platforms 2a.

[0057] It should be noted that radial direction refers to the direction perpendicular to the top and bottom directions. Outer direction refers to the direction away from the central area along the radial direction, and inner direction is opposite to outer direction.

[0058] The shape of the support platform 2a is not limited. For example, the projection plane is a plane perpendicular to the top and bottom directions. The projection shape of the support platform 2a includes but is not limited to a circle, an ellipse, an arc, a circular ring, an elliptical ring or a polygon, etc. The polygon includes but is not limited to a triangle, a square, a rhombus or a rectangle, etc. It is understood that the corners of the polygon may be chamfered or rounded.

[0059] In one embodiment, please refer to Figures 4 to 8 The support platform 2a is a rectangle extending in the radial direction, the corners of the support platform 2a are rounded, and a plurality of support platforms 2a are distributed at intervals along the circumferential direction.

[0060] In one embodiment, the support platform 2a is in a ring shape extending in the circumferential direction, and a plurality of support platforms 2a are distributed at intervals in the radial direction.

[0061] In the related art, the user inhales the aerosol generated by the aerosol generating matrix 110 puff by puff, that is, after the user finishes the current puff, the user will pause the puff and then take the next puff, and a puffing gap is generated between the current puff and the next puff where no puffing action occurs. In this way, the user will have multiple puffing gaps in the process of puffing one by one. The heating element 1 will also continue to heat in the puffing gap, that is, aerosol will also be generated in the puffing gap, and the aerosol generated in the puffing gap will be temporarily stored in the airflow space. If the amount of aerosol generated in each puffing gap is too much, the user cannot quickly remove the amount of aerosol in the airflow space during the next puff. In the process of puffing one by one, the aerosol temporarily stored in the airflow space may gradually accumulate and condense and carbonize under the action of high temperature. The carbonized aerosol will adhere to the bottom cover 2 and emit a burnt smell. This increases the difficulty for the user to clean the bottom cover 2 and may also affect the subsequent puffing taste.

[0062] In order to reduce the condensation and carbonization of aerosol in the air flow space, in one embodiment, please refer to Figures 4 to 8, the number of support platforms 2a is not less than 3. Exemplarily, the number of support platforms 2a is 3, 4, 5, 6, 7, 8, 9, 10 or 11, etc. On the one hand, without increasing the volume of a single support platform 2a, the number of support platforms 2a can be increased so that the support platforms 2a occupy more volume of the airflow space, thereby reducing the vacant area in the airflow space. In this way, the amount of aerosol retained in the airflow space can be reduced. When the next puff is taken, the amount of aerosol retained in the airflow space can be quickly drawn away by the user, reducing or even eliminating the amount of aerosol retained in the airflow space, so that the condensation and carbonization of aerosol in the airflow space during the puff-by-puff process can be reduced or even eliminated. On the other hand, more than 3 support platforms 2a can also support the aerosol generating product 100 more stably.

[0063] The vacant area refers to an area for gas such as air and / or aerosol to flow through. That is, the vacant area is not occupied by a solid structure such as the support platform 2a.

[0064] In one embodiment, please refer to Figure 5 , the height H between the top surface of the support platform 2a and the inner bottom surface of the bottom cover 2 is not higher than 0.5mm. Exemplarily, the height H between the top surface of the support platform 2a and the inner bottom surface of the bottom cover 2 is 0.5mm, 0.45mm, 0.4mm, 0.35mm, 0.3mm, 0.25mm, 0.1mm, etc. The height of the support platform 2a can be reduced to reduce the distance between the bottom surface of the aerosol generating matrix 110 and the inner bottom surface of the bottom cover 2, thereby reducing the volume of the airflow space. In this way, both the suction resistance and the amount of aerosol retained in the airflow space can be taken into account. When the next puff is taken, the amount of aerosol retained in the airflow space can be quickly drawn away by the user, reducing or even eliminating the amount of aerosol retained in the airflow space, so that the condensation and carbonization of the aerosol in the airflow space during the puff-by-puff process can be reduced or even eliminated.

[0065] It should be noted that the height H between the top surface of the support platform 2 a and the inner bottom surface of the back cover 2 refers to the height difference between the top surface of the support platform 2 a and the inner bottom surface of the back cover 2 .

[0066] In some embodiments, the number of the support platforms 2a may be no less than 3, and the height of the support platforms 2a is no more than 0.5 mm. In this way, it can be further ensured that the volume of the airflow space is small, the amount of aerosol retained in the airflow space is small, and the amount of aerosol retained in the airflow space can be quickly drawn away by the user.

[0067] In one embodiment, please refer to Figure 6 and Fig. 9The inner bottom surface of the bottom cover 2 includes a first part 2b and a second part 2c. The first part 2b protrudes toward the bottom side to form a sink 2ba, and the second part 2c is formed with a support platform 2a. That is to say, along the top-bottom direction, the height of the bottom surface of the sink 2ba is lower than the height of the second part 2c. In this way, the aerosol temporarily stored in the airflow space enters the sink 2ba. On the one hand, the sink 2ba is farther away from the heating element 1 than the second part 2c, and the sink 2ba receives less heat conducted by the heating element 1, so the temperature of the sink 2ba is lower. On the other hand, the sink 2ba increases the flow distance of the aerosol toward the bottom side, extending the heat dissipation path of the aerosol, so that the aerosol can further reduce the temperature. Therefore, the temperature of the aerosol in the sink 2ba is low to maintain the liquid state and avoid carbonization by high temperature heating.

[0068] For some examples, see Figure 6 and Fig. 9 , the support platform 2a is located on the radially outer side of the trough 2ba. That is to say, the trough 2ba is closer to the radial center than the support platform 2a. On the one hand, the heat of the bottom cover 2 comes from the heat conduction of the heating element 1. Therefore, the closer the bottom cover 2 is to the radial center, the lower the temperature; on the other hand, during the suction process, the closer to the central area, the faster the airflow velocity; therefore, the trough 2ba is located on the radially inner side of the support platform 2a, which is not only convenient for the user to quickly draw away the gaseous aerosol during the suction process, but also when the user does not completely draw out the aerosol in the trough 2ba, the residual aerosol can be kept away from the heating element 1 to remain in a liquid state, so as not to be carbonized by high-temperature heating. In this way, the subsequent user can directly pour out the liquid aerosol in the trough 2ba, and the cleaning difficulty is low.

[0069] For example, in some embodiments, please refer to Figure 6 and Fig. 9 , the sink 2ba is located in the central area of ​​the bottom cover 2. Specifically, the center line of the bottom cover 2 extending in the top-bottom direction passes through the sink 2ba. The second part 2c surrounds the outer periphery of the first part 2b. The center line of the bottom cover 2 refers to a straight line extending in the top-bottom direction and passing through the geometric center point of the inner bottom surface of the bottom cover 2.

[0070] For some examples, see Figures 4 to 8 The bottom cover 2 is an axisymmetric figure and / or a solid of revolution figure. The center line of the bottom cover 2 is the central axis of the bottom cover 2.

[0071] In some embodiments, the depth of the sink 2ba along the top-bottom direction is 1 mm to 5 mm. Exemplarily, the depth of the sink 2ba along the top-bottom direction is 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm or 5 mm, etc. The depth of the sink 2ba along the top-bottom direction is appropriate, which can effectively extend the movement distance of the aerosol to the bottom side, thereby reducing the temperature, and facilitate the user to clean the liquid aerosol remaining in the sink 2ba.

[0072] It should be noted that the depth of the depression 2 ba along the top-to-bottom direction refers to the absolute value of the height difference between the bottom surface of the depression 2 ba and the inner bottom surface of the bottom sealing member 2 .

[0073] In some embodiments, the hydraulic diameter of the sink 2ba is 4 mm to 6.5 mm. Exemplarily, the hydraulic diameter of the sink 2ba is 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.3 mm or 6.5 mm, etc. With such a design, the area of ​​the second portion 2c is moderate, and the support platform 2a located on the second portion 2c can stably support the aerosol generating matrix 110 to prevent the aerosol generating matrix 110 from entering the sink 2ba. On the other hand, it is convenient for the user to insert a cleaning tool such as a cotton swab into the sink 2ba to clean impurities such as liquid aerosols remaining in the sink 2ba.

[0074] The hydraulic diameter refers to four times the ratio of the flow cross-sectional area to the perimeter. Taking the sink 2ba as an example, the airflow enters the sink 2ba roughly along the top and bottom directions, and the plane perpendicular to the top and bottom directions is the cross section. The hydraulic diameter of the sink 2ba refers to four times the ratio of its cross-sectional area to its perimeter. For example, the cross section of the sink 2ba is circular, and the hydraulic diameter of the sink 2ba is the diameter of the circular sink 2ba.

[0075] For some examples, see Figure 4 and Figure 6 The bottom cover 2 includes a bottom shell 21, the bottom shell 21 closes the bottom opening of the heating element 1, and the inner bottom surface of the bottom shell 21 is the inner bottom surface of the bottom cover 2. In this way, the structure of the bottom cover 2 is simple, and the inner bottom surface of the bottom shell 21 forms a support platform 2a.

[0076] For some examples, see Figure 6 The inner bottom surface of the bottom shell 21 includes a first portion 2b and a second portion 2c. The first portion 2b protrudes toward the bottom side to form a sink 2ba, and the second portion 2c is formed with a support platform 2a.

[0077] The bottom shell 21 can be made of metal.

[0078] To facilitate placement of the cylindrical aerosol generating substrate 110 , the bottom shell 21 may be a cylindrical structure.

[0079] In one embodiment, please refer to Figure 8 The bottom cover 2 includes a bottom shell 21 and a heat absorber 22. The bottom shell 21 closes the bottom opening of the heating element 1. The heat absorber 22 is disposed in the bottom shell 21. The top surface of the heat absorber 22 is the inner bottom surface of the bottom cover 2. In other words, the top surface of the heat absorber 22 forms a support platform 2a. The heat absorber 22 can absorb heat to further reduce the temperature of the aerosol.

[0080] In one embodiment, the specific heat capacity of the heat absorber 22 is not less than 1.005 kJ / (kg·K). The specific heat capacity of the heat absorber 22 is 1.005 kJ / (kg·K), 2 kJ / (kg·K), etc. In this way, the heat absorbing and releasing speeds of the heat absorber 22 are relatively fast, and the temperature of the aerosol can be quickly reduced.

[0081] It should be noted that the unit "kJ / (kg·K)" is kilojoule / (kilogram*Kelvin).

[0082] The material of the heat absorber 22 is not limited. For example, the material of the heat absorber 22 includes but is not limited to silicone, rubber, ceramic and / or organic materials, etc.

[0083] In one embodiment, please refer to Figures 3 to 8 The circumferential surface of the bottom cover 2 is formed with a protrusion 2d, and the protrusion 2d is used to abut against the outer peripheral surface of the aerosol generating product 100. Exemplarily, the protrusion 2d abuts against the portion where the wrapping layer wraps around the outer periphery of the aerosol generating substrate 110. During the use of the aerosol generating product 100, after the aerosol generating substrate 110 is heated to generate aerosol, the aerosol generating substrate 110 may shrink, resulting in a reduction in radial size. The protrusion 2d can enable the wrapping layer to still be close to the aerosol generating substrate 110 when the aerosol generating substrate 110 shrinks, thereby reducing the probability of the aerosol generating substrate 110 falling into the heating chamber 1a when the aerosol generating product 100 is withdrawn from the heating chamber 1a.

[0084] In one embodiment, please refer to Figures 4 to 8 The number of the protrusions 2d is multiple, and the multiple protrusions 2d are spaced apart along the circumferential direction. Preferably, the multiple protrusions 2d can be spaced evenly along the circumferential direction. Exemplarily, three protrusions 2d are spaced evenly along the circumferential direction. In this way, the aerosol generating matrix 110 and the wrapping layer can be clamped from multiple positions in the circumferential direction, thereby improving reliability.

[0085] In one embodiment, please refer to Figure 4 and Figure 5 The bottom cover 2 includes a base 201 and an annular portion 202 with openings at both ends, the top of the annular portion 202 is connected to the bottom of the heating element 1, and the base 201 closes the bottom opening of the annular portion 202. In other words, the bottom cover 2 is a cylindrical structure with an opening at the top.

[0086] For some examples, see Figure 4 and Figure 5 The base 201 closes the bottom opening of the annular portion 202 to form a bottom shell 21. The bottom shell 21 may be an integrally formed structure.

[0087] In one embodiment, please refer to Figures 1 to 4 The heating element assembly includes a heat-insulating shell 3 and a hanging component 4. The hanging component 4 is connected to the top of the heating element 1. The heat-insulating shell 3 includes a platform 31 and a shell 32 having a receiving cavity 32a. The platform 31 is arranged on the circumferential surface of the receiving cavity 32a. The hanging component 4 is connected to the platform 31, so that the heating element 1 and the bottom cover 2 are suspended in the receiving cavity 32a. The heating element 1 and the bottom cover 2 are suspended in the receiving cavity 32a, which means that the heating element and the bottom cover 2 are not in contact with the cavity surface of the receiving cavity 32a. In this way, it is possible to avoid the heat on the heating element and the bottom cover 2 being transferred to the heat-insulating shell 3 through heat conduction.

[0088] In one embodiment, please refer to Figure 3 and Figure 4 The bottom end of the hanging member 4 is connected to the top end of the heating element 1, and the top end of the hanging member 4 is folded outward to hook the platform 31. In this way, not only can the hanging member 4, the heating element 1 and the bottom cover 2 be more firmly suspended in the accommodating cavity 32a, but also the assembly of the hanging member 4 is simpler.

[0089] For example, in some embodiments, please refer to Figure 3 and Figure 4 , the height of the platform 31 is higher than the height of the heating element 1, and the platform 31 forms a limiting groove 31a. The hanging part 4 includes a connecting end 41, a lap plate 42 and a folded edge 43. The lap plate 42 abuts against the upper surface of the platform 31. The connecting end 41 connects the top of the heating element 1 and the lap plate 42. The folded edge 43 connects the side of the lap plate 42 away from the connecting end 41 and bends toward the bottom side, and the folded edge 43 extends into the limiting groove 31a. In this way, the lap plate 42 abuts against the upper surface of the platform 31 so that the heating element 1 and the bottom cover 2 are suspended in the accommodating cavity 32a. The radial wall surface of the limiting groove 31a can limit the radial movement of the folded edge 43, so that the outer peripheral surface of the heating element 1 and the outer peripheral surface of the bottom cover 2 do not contact the cavity wall surface of the accommodating cavity 32a.

[0090] The material of the hanging part 4 is not limited. For example, the hanging part 4 can be made of metal.

[0091] In some embodiments, the aerosol generating device comprises a power source, which provides electrical energy to electrical components of the aerosol generating device, such as the heating element 1 .

[0092] The heating method of the heating element 1 includes, but is not limited to, resistance heating, electromagnetic heating, infrared heating, microwave heating or laser heating. The heating element 1 can heat the aerosol generating substrate 110 in one or more of the three forms of heat conduction, heat convection and heat radiation. The heat transfer in the form of heat convection means that the heating element 1 is not in contact with the aerosol generating substrate 110, the heating element 1 first heats the air, and then the hot air bakes and heats the aerosol generating substrate 110. Heat conduction means that the heating element 1 is in contact with the aerosol generating substrate 110 and conducts heat to the aerosol generating substrate 110. Exemplarily, resistance and electromagnetic heating mainly transfer heat to the aerosol generating substrate 110 in the form of heat conduction or heat convection. Infrared heating, microwave heating or laser heating mainly transfer heat to the aerosol generating substrate 110 in the form of heat radiation.

[0093] Taking electromagnetic heating as an example, the heating element assembly further includes a coil 5, which is sleeved on the outer periphery of the heating element 1. The coil 5 and the heating element 1 can be electromagnetic heating elements. In other words, the coil 5 can be an electromagnetic coil 5, and the heating element 1 generates eddy current self-heating in the magnetic field of the coil 5. The bottom end of the coil 5 is higher than the top end of the bottom cover 2, that is, there is no coil 5 on the outer periphery of the bottom cover 2.

[0094] In some embodiments, the aerosol generating device includes a controller, and the controller is used to control the heating element 1 and the power supply.

[0095] Exemplarily, in some embodiments, when the heating element assembly has a coil 5, the controller is electrically connected to the coil 5, and the controller can control the on and off of the coil 5, so that the heating element 1 actively generates heat or stops generating heat. In other embodiments, when the heater does not have a coil 5, the controller can be electrically connected to the heating element 1, for example, when the heating element 1 is resistive heating, the controller can control the on and off of the current of the heating element 1, so that the heating element 1 actively generates heat or stops generating heat.

[0096] For example, in one embodiment, please refer to Figure 3 The aerosol generating substrate 110 is formed with an air passage 110a, and the air passage 110a runs through at least one end of the aerosol generating substrate 110 along the top-bottom direction. The airflow can flow from the bottom end of the aerosol generating substrate 110 along the air passage 110a to the top end. In this way, the airflow formed by the aerosol can flow more smoothly, and the airflow flow resistance is smaller, which can significantly reduce the suction resistance during the suction process and improve the suction experience.

[0097] In one embodiment, the air channel 110 a may be formed inside the aerosol generating substrate 110 or formed on the outer peripheral surface of the aerosol generating substrate 110 .

[0098] In one embodiment, please refer to Figure 3The air channel 110a is a straight air channel 110a extending in a straight line. The straight air channel 110a is easy to form and can reduce the difficulty of manufacturing. The flow resistance of the airflow in the straight air channel 110a is relatively small.

[0099] In one embodiment, the air channel 110a is a curved air channel 110a, and at least part of the hole section of the curved air channel 110a is a curved shape with a non-zero curvature. The curved air channel 110a can greatly increase the flow path of the airflow without significantly increasing the length of the aerosol generating substrate 110, and can extend the contact time between the airflow and the hole wall of the curved air channel 110a, thereby improving the aerosol extraction rate.

[0100] In one embodiment, the curved airway 110a is in the shape of a spiral line. That is, the three-dimensional shape of the curved airway 110a is in the shape of a spatial spiral line. The line connecting any point of the spiral curved airway 110a and the starting point has an inclination angle relative to its axis. The spiral curved airway 110a can greatly extend the flow path of the airflow, precipitate the aerosol from the aerosol generating matrix 110 into the curved airway 110a, increase the flow speed of the aerosol in the aerosol generating matrix 110, thereby increasing the impact force of the airflow, allowing the aerosol to be evenly mixed, improving the uniformity of the aerosol, and enhancing the user's suction experience.

[0101] In one embodiment, there are multiple air channels 110 a , and the multiple air channels 110 a are distributed at intervals.

[0102] Exemplarily, the distribution of the air channels 110a is not limited, and the air channels 110a can be arranged in a one-dimensional straight line, a ring arrangement, a two-dimensional matrix arrangement, or a plurality of concentric ring arrangements, etc.

[0103] In one embodiment, with the plane perpendicular to the top and bottom directions as the cross-section, the cross-sectional shape of the airway 110a includes but is not limited to semicircular, semi-elliptical, circular, elliptical, polygonal (such as triangular, quadrilateral or pentagonal, etc.) or irregular shape, etc., wherein irregular shape refers to other symmetrical or asymmetrical shapes other than the shapes listed above.

[0104] In one embodiment, the aerosol generating substrate 110 is an integrally formed structure.

[0105] For example, the aerosol generating matrix 110 can be made into an integral structure by injection molding, die casting or extrusion. On the one hand, the overall thermal conductivity of the aerosol generating matrix 110 is greatly improved, and the heat transfer efficiency is high; on the other hand, during the use of the aerosol generating matrix 110, for example, when it is heated and sucked or when it stops being heated, it is an integral medium, and it is not easy to disintegrate and fall.

[0106] Extrusion molding refers to a processing method in which a material passes through the interaction between the barrel and the extrusion screw of an extrusion device, the material is plasticized by heat and pushed toward the discharge port by the extrusion screw, and is formed into an aerosol-generating matrix 110 with a preset cross-sectional shape and a corresponding air channel 110a through an extrusion die. For example, the air channel 110a can be formed by a die such as a die.

[0107] It should be noted that micropores may exist inside the aerosol generating matrix 110. For example, for the aerosol generating matrix 110 of the particle combination, the gaps between the particles constitute micropores. However, the airway 110a described in the present application is different from the micropores. The airway 110a described in the present application belongs to the pores in the macroscopic sense, and the micropores belong to the pores in the microscopic sense. The flow cross-sectional area and length of the airway 110a are much larger than those of the micropores. The airway 110a is mainly formed by design and processing, such as by die processing. Therefore, the flow cross-sectional area and length of the airway 110a can be changed according to the design requirements, while the size of the micropores is determined by the gaps between the particles. For example, the material is a granular material, and the aerosol generating matrix 110 formed by extrusion of the material has micropores. The flow cross-sectional area and length of the micropores are naturally formed by the extrusion process and the material components. The material feeding tube expands to a certain extent after flowing out of the die, which can form micropores. In other words, the formation of the micropores is random.

[0108] In one embodiment, the aerosol generating substrate 110 includes plant raw materials, auxiliary raw materials, smoke generating agent raw materials, adhesive raw materials and flavor raw materials.

[0109] The plant raw material is used to generate aerosol when heated. The auxiliary raw material is used to provide a skeleton support for the plant raw material. The smoke-generating agent raw material is used to generate a large amount of smoke when heated. The adhesive raw material is used to bond the component raw materials. The fragrance raw material is used to provide a characteristic aroma. In this way, the plant raw material and the smoke-generating agent raw material can ensure the amount of aerosol generated, while the fragrance raw material can enhance the release of the aroma during the suction process and enhance the user experience. The auxiliary raw material can not only improve the fluidity of the mixed material, but also make the aerosol generating matrix 110 porous to facilitate the extraction and flow of the aerosol. The adhesive raw material ensures that the plant raw material powder and the auxiliary agent etc. constitute a stable mixture to avoid a loose structure.

[0110] In one embodiment, the plant raw material is one or more combinations of powders formed by crushing tobacco raw materials, tobacco leaf fragments, tobacco stems, tobacco dust, and aromatic plants. The plant raw material is the core source of flavor. The endogenous substances in the plant raw material can produce physiological satisfaction for the user. The endogenous substances, such as alkaloids, enter the human blood and promote the pituitary gland to produce dopamine, thereby obtaining physiological satisfaction.

[0111] In one embodiment, the auxiliary agent raw material can be one or more combinations of inorganic fillers, lubricants, and emulsifiers. Among them, the inorganic filler includes one or more combinations of heavy calcium carbonate, light calcium carbonate, zeolite, attapulgite, talc, and diatomaceous earth. The inorganic filler can provide a skeleton support for the plant raw material, and the inorganic filler also has micropores, which can increase the porosity of the aerosol generating matrix 110, thereby increasing the aerosol release rate.

[0112] The lubricant includes one or more combinations of candelilla wax, carnauba wax, shellac, sunflower wax, rice bran, beeswax, stearic acid, and palmitic acid. The lubricant can increase the fluidity of the plant raw material powder, reduce the friction between the plant raw material powders, make the overall density of the plant raw material powder distribution more uniform, and also reduce the pressure required in the extrusion molding process and reduce the wear of the die.

[0113] The emulsifier includes one or more combinations of polyglycerol fatty acid ester, Tween-80, and polyvinyl alcohol. The emulsifier can slow down the loss of flavor substances during storage to a certain extent, increase the stability of flavor substances, and improve the sensory quality of the product.

[0114] In one embodiment, the smoke-generating agent raw material may include: a monohydric alcohol (such as menthol); a polyhydric alcohol (such as propylene glycol, glycerol, triethylene glycol, 1,3-butylene glycol and tetraethylene glycol); an ester of a polyhydric alcohol (such as triacetin, triethyl citrate, a mixture of diacetin esters, triethyl citrate, benzyl benzoate, glyceryl tributyrate); a monocarboxylic acid; a dicarboxylic acid; a polycarboxylic acid (such as lauric acid, myristic acid) or an aliphatic ester of a polycarboxylic acid (such as dimethyl dodecanedioate, dimethyl tetradecanedioate, erythritol, 1,3-butylene glycol, tetraethylene glycol, triethyl citrate, propylene carbonate, ethyl laurate, Triactin, meso-erythritol, a mixture of diacetin esters, diethyl suberate, triethyl citrate, benzyl benzoate, benzyl phenylacetate, ethyl vanillate, glyceryl tributyrate, lauryl acetate) or one or more combinations thereof.

[0115] In one embodiment, the adhesive raw material is in close contact with the component raw material interface by wetting, generating intermolecular attraction, thereby playing the role of bonding the component raw materials such as powders, liquids, etc. The adhesive raw material can be a natural plant extract, a non-ionized modified viscous polysaccharide, including one or more combinations of tamarind polysaccharide, guar gum, and modified cellulose (such as carboxymethyl cellulose). The adhesive is used to bond the particles together, which is not easy to loosen. In addition, it improves the water resistance of the aerosol generating matrix 110 and is harmless to the human body.

[0116] In one embodiment, the flavor raw material is used to provide a characteristic aroma, such as a solid or liquid substance of hay aroma, roasted sweet aroma, and nicotine. The flavor raw material may include one or more combinations of tobacco, flavor plant extracts, extracts, essential oils, and absolute oils; the flavor raw material may include one or more combinations of monomer flavor substances, such as megastigmatriene, neophytadiene, geraniol, nerol, and the like.

[0117] The functional section 120 includes at least a filter section 121. The filter section 121 is used to filter the aerosol generated by the aerosol generating substrate 110. For example, a user can inhale the filtered aerosol by holding the filter section 121 in the mouth. The aerosol generated by the aerosol generating substrate 110 is transported to the filter section 121 under the action of the suction negative pressure.

[0118] For example, the filter section 121 can block substances of target particle size and can also adjust the inhalation resistance. For example, the filter section 121 can filter large-size particles similar to powdery substances. The aerosol filtered by the filter section 121 has a higher consistency in particle size and a more delicate taste.

[0119] In some embodiments, the functional section 120 may only include the filtering section 121 .

[0120] In some other embodiments, the functional section 120 further includes a cooling section 122, which is located between the filtering section 121 and the aerosol generating matrix 110, and is used to cool the aerosol before the filtering section 121 filters the aerosol. The cooling section 122 can improve the "hot mouth" phenomenon when the user inhales the aerosol.

[0121] The materials used for the wrapping layer include but are not limited to paper, composite materials with paper as a carrier, inorganic minerals or metal films, etc.

[0122] The materials used for the filter section 121 include, but are not limited to, one or more combinations of PE (polyethylene), PLA (Polylactic Acid), PBAT (Polybutylene Adipate Terephthalate), PP (Polypropylene), acetate fiber, acrylic fiber and the like.

[0123] The materials used in the cooling section 122 include, but are not limited to, one or more combinations of PE (polyethylene), PLA (Polylactic Acid), PBAT (Polybutylene Adipate Terephthalate), PP (Polypropylene), acetate fiber, acrylic fiber and the like.

[0124] The materials of the cooling section 122 and the filtering section 121 may be the same or different.

[0125] In the description of the present application, the description with reference to the terms "in one embodiment", "in some embodiments", "in other embodiments", "in yet other embodiments", or "exemplary" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0126] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A heating element assembly, characterized in that: include: A heating element, wherein the heating element is formed with a heating cavity, and both ends of the top and bottom of the heating element have openings communicating with the heating cavity, and the heating cavity is used to accommodate the aerosol generating product; A bottom cover member is provided to seal the bottom opening of the heating element, and a support platform is formed on the inner bottom surface of the bottom cover member, wherein the top surface of the support platform is used to abut against the aerosol generating product.

2. The heating element assembly according to claim 1, characterized in that: There are multiple support platforms, and the multiple support platforms are distributed at intervals along the circumferential direction or along the radial direction.

3. The heating element assembly according to claim 1, characterized in that: The number of the support platforms is no less than 3.

4. The heating element assembly according to claim 1, characterized in that: The height between the top surface of the support platform and the inner bottom surface of the bottom cover is not higher than 0.5 mm.

5. The heating element assembly according to claim 1, characterized in that: The inner bottom surface of the bottom cover comprises a first portion and a second portion, wherein the first portion protrudes toward the bottom side to form a sink, and the second portion is formed with the support platform.

6. The heating element assembly according to claim 5, characterized in that: The support platform is located on the outer side of the sink in the radial direction; and / or, The sink is located in the central area of ​​the bottom cover.

7. The heating element assembly according to claim 5, characterized in that: The depth of the sink along the top and bottom directions is 1 mm to 5 mm; and / or, The hydraulic diameter of the sink is 4 mm to 6.5 mm.

8. The heating element assembly according to claim 1, characterized in that: The bottom cover comprises a bottom shell, the bottom shell closes the bottom opening of the heating element, and the inner bottom surface of the bottom shell is the inner bottom surface of the bottom cover.

9. The heating element assembly according to claim 1, characterized in that: The bottom cover comprises a bottom shell and a heat absorber, wherein the bottom shell closes the bottom opening of the heating element, the heat absorber is arranged in the bottom shell, and the top surface of the heat absorber is the inner bottom surface of the bottom cover.

10. The heating element assembly according to claim 1, characterized in that: A protrusion is formed on the circumferential surface of the bottom cover, and the protrusion is used to abut against the outer circumferential surface of the aerosol generating product.

11. The heating element assembly according to claim 10, characterized in that: There are multiple protrusions, and the multiple protrusions are distributed at intervals along the circumferential direction.

12. The heating element assembly according to claim 1, characterized in that: The bottom sealing member includes a base and an annular portion with openings at both ends, the top end of the annular portion is connected to the bottom end of the heating element, and the base closes the bottom end opening of the annular portion.

13. The heating element assembly according to any one of claims 1 to 12, characterized in that: The heating element assembly includes a heat-insulating shell and a hanging piece, wherein the hanging piece is connected to the top end of the heating element, the heat-insulating shell includes a platform and a shell having a accommodating cavity, the platform is arranged on the circumferential surface of the accommodating cavity, and the hanging piece is connected to the platform so that the heating element and the bottom cover are suspended in the accommodating cavity.

14. An aerosol generating device, characterized in that: The heating element assembly comprises the heating element assembly according to any one of claims 1 to 13.

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