Heating body assembly and aerosol generating device

Abstract

The present application relates to the technical field of aerosol generation, and provides a heating body assembly and an aerosol generating device. The heating body assembly comprises a heating body and a bottom sealing member; a heating cavity is formed in the heating body, openings communicated with the heating cavity are formed in both the top and bottom ends of the heating body, and the heating cavity is used for accommodating an aerosol generating product; the bottom sealing member seals the opening in the bottom end of the heating body, a support table is formed on the internal bottom surface of the bottom sealing member, and the top surface of the support table is used for abutting against the aerosol generating product. The support 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 internal bottom surface of the bottom sealing member and the bottom surface of the aerosol generating product, thereby avoiding excessive inhalation resistance during inhalation of the aerosol generating product caused by the fitting of the bottom surface of the aerosol generating product and the internal bottom surface of the bottom sealing member.

Description

Heating element assembly and aerosol generating device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202310984115.8 and application date of August 7, 2023, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] 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

[0004] 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.

[0005] 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 enough to emit aerosol. The aerosol generating substrate will not burn. When in use, the aerosol generating substrate is released by heating the aerosol generating substrate.

[0006] In the related art, a user inhales an aerosol generating product to obtain aerosol. When the aerosol generating device heats the aerosol generating substrate to generate aerosol, the inhalation resistance is relatively large.

[0007] Summary of the Invention

[0008] In view of this, embodiments of the present application hope to provide a heating element assembly and an aerosol generating device that can reduce suction resistance.

[0009] To achieve the above objectives, the present invention provides a heating element assembly, including:

[0010] a heating element, wherein the heating element forms a heating cavity, and both the top and bottom ends of the heating element have openings communicating with the heating cavity, and the heating cavity is used to accommodate the aerosol generating product;

[0011] A bottom sealing member closes the bottom opening of the heating element, and a support platform is formed on the inner bottom surface of the bottom sealing member, and the top surface of the support platform is used to abut against the aerosol generating product.

[0012] 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.

[0013] In some embodiments, the number of the support platforms is no less than 3.

[0014] In some embodiments, the height between the top surface of the support platform and the inner bottom surface of the bottom cover is no more than 0.5 mm.

[0015] 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 forms the support platform.

[0016] In some embodiments, the support platform is located radially outside the sink; and / or,

[0017] The sink is located in the central area of ​​the bottom cover.

[0018] In some embodiments, the depth of the sink along the top and bottom directions is 1 mm to 5 mm; and / or,

[0019] The hydraulic diameter of the sink is 4 mm to 6.5 mm.

[0020] In some embodiments, the bottom cover includes 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.

[0021] 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.

[0022] 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.

[0023] In some embodiments, there are multiple protrusions, and the multiple protrusions are distributed at intervals along the circumferential direction.

[0024] In some embodiments, the bottom cover includes a base and an annular portion with openings at both top and bottom 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.

[0025] In some embodiments, the heating element assembly includes an insulating shell and a hanging part, the hanging part is connected to the top of the heating element, the insulating shell includes a platform and a shell with a accommodating cavity, the platform is arranged on the circumferential surface of the accommodating cavity, and the hanging part is connected to the platform so that the heating element and the bottom cover are suspended in the accommodating cavity.

[0026] An embodiment of the present application also provides an aerosol generating device, comprising any one of the heating element components described above.

[0027] The heating element assembly provided in the embodiment of the present application, on the one hand, has a bottom seal member that seals the bottom opening of the heating element, so that the bottom seal member and the heating element together form a structure with only the top opening, thereby 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 seal member and the bottom surface of the aerosol generating product. Exemplarily, an airflow space is formed between the inner bottom surface of the bottom seal member and the bottom surface of the aerosol generating matrix, thereby preventing the bottom surface of the aerosol generating product, such as the bottom surface of the aerosol generating matrix, from being attached to the inner bottom surface of the bottom seal member, causing excessive suction resistance during the suction process of the aerosol generating product. On the other hand, the bottom seal member has no heating function, so that the bottom seal member can be prevented from heating the aerosol retained in the airflow space to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1 is a schematic diagram of the assembly of a heating element assembly and an aerosol generating article in one embodiment of the present application;

[0029] FIG2 is a schematic structural diagram of the structure shown in FIG1 from another perspective;

[0030] FIG3 is a cross-sectional view taken along the AA direction in FIG2 ;

[0031] FIG4 is an exploded schematic diagram of the hanging member, the heating element and the first bottom cover member in the structure shown in FIG1 ;

[0032] FIG5 is a cross-sectional view of the first bottom cover shown in FIG4 ;

[0033] FIG6 is a schematic structural diagram of a second back cover member in one embodiment of the present application;

[0034] FIG7 is a schematic structural diagram of the second back cover shown in FIG6 from another perspective;

[0035] FIG8 is a schematic structural diagram of a third back cover member in one embodiment of the present application;

[0036] FIG9 is a cross-sectional view of the second back cover shown in FIG6. DETAILED DESCRIPTION

[0037] It should be noted that, unless there is a conflict, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific implementation methods should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application. In this application, the unit "mm" is millimeter.

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

[0039] For example, the aerosol generating device may be a portable aerosol generating device. The outline of the aerosol generating device may be roughly in the shape of an elongated strip, so that the aerosol generating device can be easily held by the user's fingers.

[0040] The aerosol generating article is used in conjunction with an aerosol generating device having a heating element. Referring to FIG1 , the aerosol generating device heats the aerosol generating article 100 via a heating element component.

[0041] Referring to FIG. 3 , an aerosol-generating article 100 includes an aerosol-generating substrate 110. The aerosol-generating substrate 110 is configured to be heated to generate an aerosol. For example, the aerosol-generating substrate 110 can be adapted to generate the aerosol using a heat-not-burn method. That is, the aerosol-generating substrate 110 is heated to a temperature below its ignition point to generate the aerosol. The aerosol-generating substrate 110 does not burn during the aerosol generation process.

[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, referring to Figures 1 to 3 , an aerosol-generating article 100 includes a functional segment 120 and a wrapping layer. The functional segment 120 is disposed on top of an 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] Please refer to 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] Referring to Figures 3 and 4 , the heating element 1 is formed with a heating cavity 1a. Both the top and bottom ends of the heating element 1 have openings communicating with the heating cavity 1a. The heating cavity 1a is used to accommodate an aerosol-generating article 100. For example, the heating cavity 1a is used to house the aerosol-generating substrate 110 of the aerosol-generating article 100. The heating element 1 is capable of generating heat to heat the aerosol-generating substrate 110. The aerosol-generating article 100 can be inserted into the heating cavity 1a through the top opening of the heating element 1. Heat from the heating element 1 is transferred radially inward from the outer periphery of the aerosol-generating substrate 110.

[0048] The bottom cover 2 seals the bottom opening of the heating element 1. A support platform 2a is formed on the inner bottom surface of the bottom cover 2. The top surface of the support platform 2a is configured to abut the aerosol-generating article 100. For example, the top surface of the support platform 2a is configured to abut the aerosol-generating substrate 110. The support platform 2a can support the bottom surface of the aerosol-generating substrate 110, such that an airflow space is formed between the inner bottom surface of the bottom cover 2 and the bottom surface of the aerosol-generating article 100. For example, the support platform 2a can support the bottom surface of the aerosol-generating substrate 110, such 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 back cover 2 refers to the surface of the back 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, while the bottom cover 2 does not. The heating function refers to the ability to actively heat or stop heating. For example, the heating element 1 can actively heat or stop heating. It is understood that the heat from the heating element 1 may be transferred to the bottom cover 2, causing the bottom cover 2 to increase in temperature. Heating the aerosol-generating substrate 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 seal 2 seals the bottom opening of the heating element 1, so that the bottom seal 2 and the heating element 1 together form a structure with only the top opening. This restricts the aerosol generated by the aerosol generating matrix 110 from flowing in a unidirectional manner from bottom to top, thereby reducing the dissipation of the aerosol. On the other hand, the support platform 2a can support the bottom surface of the aerosol generating article 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 seal 2 and the bottom surface of the aerosol generating article 100. For example, the airflow space is formed between the inner bottom surface of the bottom seal 2 and the bottom surface of the aerosol generating matrix 110, thereby preventing the bottom surface of the aerosol generating article 100, such as the bottom surface of the aerosol generating matrix 110, from contacting the inner bottom surface of the bottom seal 2, thereby preventing the aerosol generating article 100 from having excessive suction resistance during inhalation. On the other hand, the bottom seal 2 does not have a heating function, so that the bottom seal 2 can, to a certain extent, prevent the aerosol retained in the airflow space from being heated by the bottom seal 2.

[0052] The cross-sectional shape of the aerosol-generating substrate 110, measured along a plane perpendicular to the top and bottom directions, is not limited. Exemplary cross-sectional shapes include circular, elliptical, polygonal (including but not limited to triangles, squares, or prisms), racetrack-shaped, or irregularly shaped. "Irregularly shaped" refers to symmetrical or asymmetrical shapes other than those listed above. Regular cross-sectional shapes other than irregular shapes provide for better product consistency and facilitate product quality monitoring.

[0053] The present embodiment uses the example of an aerosol-generating substrate 110 having a circular cross-sectional shape as an example, i.e., the aerosol-generating substrate 110 is cylindrical as a whole. The cross-sectional shape of the functional segment 120 is the same as that of the aerosol-generating substrate 110, i.e., the cross-sectional shape of the functional segment 120 is also circular. Thus, the aerosol-generating article 100 is cylindrical as a whole.

[0054] In one embodiment, referring to Figures 4 to 8 , there are multiple support platforms 2a , which can support the aerosol generating substrate 110 from multiple positions.

[0055] In one embodiment, referring to Figures 4 to 8 , a plurality of support platforms 2a are spaced apart along the circumference, so that each portion of the aerosol generating substrate 110 along the circumference can be supported by the support platforms 2a.

[0056] In one embodiment, the 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 refers to the direction perpendicular to the top and bottom directions. Outer refers to the direction radially away from the center area, and inner is opposite to outer.

[0058] The shape of the support platform 2a is not limited. For example, with a plane perpendicular to the top and bottom directions as the projection surface, 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. Polygons include, but are not limited to, a triangle, a square, a rhombus, or a rectangle. It is understood that the corners of the polygon may be chamfered or rounded.

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

[0060] In one embodiment, the support platform 2a is in the shape of a ring 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 puffing the current puff, the user will pause puffing before taking the next puff, and a puffing gap in which no puffing action occurs is generated between the current puff and the next puff. In this way, the user will have multiple puffing gaps during 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 temporarily exist 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 existing 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 seal 2 and emit a burnt smell. This increases the difficulty for the user to clean the bottom seal 2 and may also affect the taste of subsequent puffs.

[0062] To reduce aerosol condensation and carbonization within the airflow space, in one embodiment, referring to Figures 4 to 8 , the number of support platforms 2a is no less than three. 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 a larger volume of the airflow space, thereby reducing the vacant area within the airflow space. This can reduce the amount of aerosol remaining in the airflow space. During the next puff, the remaining aerosol in the airflow space can be quickly drawn away by the user, reducing or even eliminating the amount of aerosol remaining in the airflow space. This can reduce or even eliminate aerosol condensation and carbonization within the airflow space during each puff. On the other hand, having three or more support platforms 2a can also provide more stable support for the aerosol-generating article 100.

[0063] The vacant area refers to an area for gas, such as air and / or aerosol, to circulate in. In other words, the vacant area is not occupied by a solid structure, such as the support platform 2a.

[0064] In one embodiment, referring to FIG5 , the height H between the top surface of the support platform 2a and the inner bottom surface of the bottom cover 2 is no greater than 0.5 mm. For example, the height H between the top surface of the support platform 2a and the inner bottom surface of the bottom cover 2 is 0.5 mm, 0.45 mm, 0.4 mm, 0.35 mm, 0.3 mm, 0.25 mm, 0.1 mm, and so on. By reducing the height of the support platform 2a, the distance between the bottom surface of the aerosol generating substrate 110 and the inner bottom surface of the bottom cover 2 can be reduced, thereby reducing the volume of the airflow space. This balances the suction resistance and reduces the amount of aerosol retained in the airflow space. During the next puff, the amount of aerosol retained in the airflow space can be quickly withdrawn by the user, reducing or even eliminating the amount of aerosol retained in the airflow space. This reduces or even eliminates the condensation and carbonization of aerosol in the airflow space during each puff.

[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 support platforms 2a can be no less than three, and the height of the support platforms 2a is no greater than 0.5 mm. This can further ensure 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 withdrawn by the user.

[0067] In one embodiment, referring to Figures 6 and 9 , the inner bottom surface of the bottom seal 2 includes a first portion 2b and a second portion 2c. The first portion 2b protrudes toward the bottom to form a trough 2ba, and the second portion 2c is formed with a support platform 2a. That is, along the top-to-bottom direction, the height of the bottom surface of the trough 2ba is lower than the height of the second portion 2c. In this way, the aerosol temporarily stored in the airflow space enters the trough 2ba. On the one hand, the trough 2ba is farther away from the heating element 1 than the second portion 2c, and the trough 2ba receives less heat conducted by the heating element 1, so the temperature of the trough 2ba is lower. On the other hand, the trough 2ba increases the distance that the aerosol flows toward the bottom, extending the heat dissipation path of the aerosol, allowing the aerosol to further reduce its temperature. Therefore, the temperature of the aerosol in the trough 2ba is lower, maintaining a liquid state and avoiding carbonization due to high temperature heating.

[0068] In some embodiments, please refer to Figures 6 and 9, the support platform 2a is located on the radially outer side of the trough 2ba. That is, 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 not only makes it convenient for the user to quickly draw away the gaseous aerosol during the suction process, but also allows the residual aerosol to stay away from the heating element 1 to remain in liquid form when the user does not completely draw out the aerosol in the trough 2ba, so that it will not 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, as shown in Figures 6 and 9 , recess 2ba is located in the center of bottom cover 2. Specifically, the centerline of bottom cover 2, extending from top to bottom, passes through recess 2ba. Second portion 2c surrounds the periphery of first portion 2b. The centerline of bottom cover 2 is a straight line extending from top to bottom and passing through the geometric center point of the inner bottom surface of bottom cover 2.

[0070] In some embodiments, referring to Figures 4 to 8 , the back cover 2 is an axially symmetrical figure and / or a solid of rotation figure. The center line of the back cover 2 is the central axis of the back cover 2 .

[0071] In some embodiments, the depth of the trough 2ba along the top-to-bottom direction is 1 mm to 5 mm. Exemplarily, the depth of the trough 2ba along the top-to-bottom direction is 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, or 5 mm, etc. An appropriate depth of the trough 2ba along the top-to-bottom direction can effectively extend the aerosol's travel distance to the bottom, thereby reducing the temperature, while also making it easier for the user to clean residual liquid aerosol within the trough 2ba.

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

[0073] In some embodiments, the hydraulic diameter of the trough 2ba is between 4 mm and 6.5 mm. Exemplary hydraulic diameters of the trough 2ba are 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.3 mm, or 6.5 mm, among others. This design allows the second portion 2c to have a moderate area. The support platform 2a on the second portion 2c can stably support the aerosol-generating substrate 110, preventing it from entering the trough 2ba. Furthermore, it facilitates the user to insert cleaning tools, such as cotton swabs, into the trough 2ba to remove impurities, such as liquid aerosol, remaining therein.

[0074] The hydraulic diameter refers to four times the ratio of the flow cross-sectional area to the circumference. Taking trough 2ba as an example, airflow enters trough 2ba roughly along the top-bottom direction. With a plane perpendicular to this direction as the cross-section, the hydraulic diameter of trough 2ba is four times the ratio of its cross-sectional area to its circumference. For example, if trough 2ba has a circular cross-section, the hydraulic diameter of trough 2ba is the diameter of the circular trough 2ba.

[0075] In some embodiments, referring to Figures 4 and 6 , the bottom cover 2 includes a bottom shell 21 that seals the bottom opening of the heating element 1. The inner bottom surface of the bottom shell 21 serves as the inner bottom surface of the bottom cover 2. Thus, 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] In some embodiments, referring to FIG. 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 to form a sink 2ba , and the second portion 2c forms 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, referring to Figure 8 , the bottom cover 2 includes a bottom shell 21 and a heat absorber 22. The bottom shell 21 seals the bottom opening of the heating element 1. The heat absorber 22 is disposed within the bottom shell 21. The top surface of the heat absorber 22 forms the inner bottom surface of the bottom cover 2. In other words, the top surface of the heat absorber 22 forms the support platform 2a. The heat absorber 22 absorbs heat, further reducing 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), and so on. In this way, the heat absorber 22 absorbs and releases heat at a relatively fast rate, thereby rapidly reducing the temperature of the aerosol.

[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, referring to Figures 3 to 8 , a protrusion 2d is formed on the circumferential surface of the bottom cover 2, and the protrusion 2d is used to abut against the outer peripheral surface of the aerosol-generating article 100. For example, the protrusion 2d abuts against the portion where the wrapping layer wraps around the outer periphery of the aerosol-generating substrate 110. During use of the aerosol-generating article 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 ensure that the wrapping layer remains in close contact with the aerosol-generating substrate 110 even when the aerosol-generating substrate 110 shrinks, thereby reducing the chance of the aerosol-generating substrate 110 falling into the heating chamber 1a when the aerosol-generating article 100 is withdrawn from the heating chamber 1a.

[0084] In one embodiment, referring to Figures 4 to 8 , there are multiple protrusions 2d, each spaced apart along the circumference. Preferably, the multiple protrusions 2d are evenly spaced along the circumference. For example, three protrusions 2d are evenly spaced along the circumference. This allows the aerosol generating substrate 110 and the wrapping layer to be clamped at multiple circumferential locations, improving reliability.

[0085] In one embodiment, referring to Figures 4 and 5 , the bottom cover 2 includes a base 201 and an annular portion 202 with openings at both the top and bottom ends. The top end of the annular portion 202 is connected to the bottom end 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 open top.

[0086] 4 and 5 , in some embodiments, 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, referring to Figures 1 to 4, the heating element assembly includes a heat-insulating shell 3 and a hanging part 4. The hanging part 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 part 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, the heat on the heating element and the bottom cover 2 can be prevented from being transferred to the heat-insulating shell 3 through heat conduction.

[0088] In one embodiment, referring to Figures 3 and 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 onto the mounting platform 31. This not only allows the hanging member 4, heating element 1, and bottom cover 2 to be more securely suspended within the accommodating cavity 32a, but also simplifies assembly of the hanging member 4.

[0089] For example, in some embodiments, please refer to Figures 3 and 4. The height of the platform 31 is higher than the height of the heating element 1. 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 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. The folded edge 43 extends into the limiting groove 31a. In this way, the lap plate 42 abuts 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 includes a power supply that provides electrical energy to electrical components of the aerosol generating device, such as the heating element 1 .

[0092] The heating methods of the heating element 1 include, but are not limited to, resistive 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. Transferring heat 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. For example, resistive 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 also includes a coil 5, which is sleeved around 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 currents in the magnetic field of the coil 5, which causes self-heating. The bottom end of the coil 5 is higher than the top end of the bottom seal 2, which means that the coil 5 is not located on the outer periphery of the bottom seal 2.

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

[0095] For example, 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 to make the heating element 1 actively generate heat or stop 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, if the heating element 1 is a resistive heating element, the controller can control the on and off of the current in the heating element 1 to make the heating element 1 actively generate heat or stop generating heat.

[0096] For example, in one embodiment, as shown in FIG3 , the aerosol-generating substrate 110 is formed with an air channel 110a. The air channel 110a extends through at least one end of the aerosol-generating substrate 110 along the top-to-bottom direction. Airflow can flow from the bottom end of the aerosol-generating substrate 110 along the air channel 110a toward the top end. This allows the aerosol-generating airflow to flow more smoothly, with less flow resistance, significantly reducing the inhalation resistance during the puffing process and improving the puffing 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, referring to FIG3 , the air passage 110 a is a linear air passage 110 a extending in a straight line. The linear air passage 110 a is easy to form, which reduces manufacturing difficulty. The flow resistance of the airflow in the linear air passage 110 a is relatively small.

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

[0100] In one embodiment, the curved airway 110a is helical. That is, the three-dimensional shape of the curved airway 110a is a spatial helical shape. A line connecting any point of the helical curved airway 110a and its starting point has an inclination angle relative to its axis. The helical curved airway 110a can significantly extend the flow path of the airflow, allowing aerosol to precipitate from the aerosol generating matrix 110 into the curved airway 110a, increasing the flow velocity of the aerosol within the aerosol generating matrix 110, thereby increasing the impact of the airflow, enabling even mixing of the aerosol, improving aerosol uniformity, and enhancing the user's inhalation experience.

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

[0102] For example, the distribution of the air channels 110a is not limited. The air channels 110a can be arranged in a one-dimensional straight line, a ring, a two-dimensional matrix, or multiple concentric rings.

[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 a triangle, quadrilateral or pentagon, etc.) or irregular shape, etc., where 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 formed into an integral structure through processes such as injection molding, die-casting, or extrusion. This significantly improves the overall thermal conductivity of the aerosol-generating matrix 110, resulting in high heat transfer efficiency. Furthermore, the aerosol-generating matrix 110 remains a single unit during use, such as during heating and after heating, making it less likely to disintegrate or fall apart.

[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 extruder, is heated and plasticized, and is pushed toward the discharge port by the extrusion screw. The material is then formed into an aerosol-generating substrate 110 having a predetermined cross-sectional shape and corresponding air channels 110a through an extrusion die. For example, the air channels 110a can be formed by a die, such as a die.

[0107] It should be noted that micropores may exist within the aerosol-generating matrix 110. For example, in the aerosol-generating matrix 110 of a particle assembly, the gaps between the particles constitute the micropores. However, the air channels 110a described herein are distinct from micropores. The air channels 110a described herein are pores in the macroscopic sense, while micropores are pores in the microscopic sense. Dimensions such as the flow cross-sectional area and length of the air channels 110a are much larger than those of the micropores. The air channels 110a are primarily formed through design and processing, such as through die processing. Therefore, the flow cross-sectional area and length of the air channels 110a can be varied according to design requirements, whereas the size of the micropores is determined by the gaps between the particles. For example, if the material is a granular material and the aerosol-generating matrix 110 formed by extrusion has micropores, the flow cross-sectional area and length of the micropores are naturally formed by the extrusion process and the composition of the material. The micropores can be formed by a certain amount of expansion after the material flows out of the die. In other words, the formation of the micropores is random.

[0108] In one embodiment, the aerosol-generating substrate 110 includes a plant material, an auxiliary material, a smoke-generating agent material, a binder material, and a flavor material.

[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 flavor 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 flavor raw material can enhance the release of aroma during the inhalation process and improve 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 have a porous structure to facilitate the extraction and flow of the aerosol. The adhesive raw material ensures that the plant raw material powder and the auxiliary agent constitute a stable mixture to avoid a loose structure.

[0110] In one embodiment, the plant raw material is one or more combinations of crushed tobacco leaves, tobacco leaf fragments, tobacco stems, tobacco dust, and flavorful plants, resulting in powder. The plant raw material is the core source of flavor. Endogenous substances in the plant raw material can produce a physiological sense of satisfaction in the user. Endogenous substances, such as alkaloids, enter the human bloodstream and stimulate the pituitary gland to produce dopamine, thereby achieving a physiological sense of satisfaction.

[0111] In one embodiment, the auxiliary agent raw material can be one or more combinations of inorganic fillers, lubricants, and emulsifiers. Inorganic fillers include one or more combinations of heavy calcium carbonate, light calcium carbonate, zeolite, attapulgite, talc, and diatomaceous earth. Inorganic fillers can provide skeletal support for the plant material and also have micropores, which can increase the porosity of the aerosol-generating matrix 110, thereby improving the aerosol release rate.

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

[0113] Emulsifiers include one or more combinations of polyglycerol fatty acid esters, Tween-80, and polyvinyl alcohol. Emulsifiers can, to a certain extent, slow down the loss of flavor substances during storage, 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, tributyrin); 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, tributyrin, lauryl acetate) or one or more combinations thereof.

[0115] In one embodiment, the binder material wets the interface with the component materials, creating close contact and intermolecular attraction, thereby bonding the component materials, such as powders and liquids. The binder material can be a natural plant extract, a non-ionically modified viscous polysaccharide, or a combination thereof, including tamarind polysaccharide, guar gum, and modified cellulose (e.g., carboxymethyl cellulose). The binder is used to bond the particles together, preventing them from loosening. Furthermore, it improves the water resistance of the aerosol-generating matrix 110 and is harmless to the human body.

[0116] In one embodiment, the flavoring raw materials are solid or liquid substances used to provide characteristic aromas, such as hay, roasted sweet, or nicotine. The flavoring raw materials may include one or more combinations of tobacco, aromatic plant extracts, extracts, essential oils, and absolutes. The flavoring raw materials may also include monomeric flavoring substances, such as one or more combinations of megastigmatrienone, neophytadiene, geraniol, and nerol.

[0117] Functional section 120 includes at least a filter section 121. Filter section 121 is used to filter the aerosol generated by aerosol-generating substrate 110. For example, a user can orally hold filter section 121 to inhale the filtered aerosol. The aerosol generated by aerosol-generating substrate 110 is transported to filter section 121 under the influence of negative suction pressure.

[0118] For example, filter segment 121 can block particles of a target size and adjust the inhalation resistance. For example, filter segment 121 can filter large particles similar to powdered substances. Aerosol filtered through filter segment 121 has a more consistent particle size and a more delicate taste.

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

[0120] In other embodiments, the functional section 120 further includes a cooling section 122, located between the filtering section 121 and the aerosol generating substrate 110. The cooling section 122 is configured to cool the aerosol before filtering the aerosol by the filtering section 121. The cooling section 122 can reduce the "burning 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 cooling section 122 and the filtering section 121 may be made of the same material or different materials.

[0125] In the description of this application, the descriptions with reference to the terms "in one embodiment", "in some embodiments", "in other embodiments", "in further embodiments", or "exemplary" etc. mean 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 this application, the schematic representations of the above terms do 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 different embodiments or examples described in this application and features of different embodiments or examples, unless they are mutually inconsistent.

[0126] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application are intended to be within the scope of protection of the present application.

Claims

1. A heating element assembly, comprising: 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 , wherein the number of the supporting platforms is multiple, and the multiple supporting platforms are distributed at intervals along the circumferential direction or along the radial direction. 3 . The heating element assembly according to claim 1 , wherein the number of the supporting platforms is no less than 3. 4 . The heating element assembly according to claim 1 , wherein the height between the top surface of the support platform and the inner bottom surface of the bottom sealing member is not higher than 0.5 mm. 5 . The heating element assembly according to claim 1 , wherein 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 forms the support platform.

6. The heating element assembly according to claim 5, wherein the support platform is located radially outside the sink; and / or The sink is located in the central area of ​​the bottom cover.

7. The heating element assembly according to claim 5, wherein 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, wherein 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, wherein 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 heat generating element assembly according to claim 1 , wherein a protrusion is formed on a circumferential surface of the bottom cover, and the protrusion is used to abut against an outer circumferential surface of the aerosol generating product. The heating element assembly according to claim 10 , wherein the number of the protrusions is plural, and the protrusions are spaced apart and distributed along the circumferential direction.

12. The heating element assembly according to claim 1, wherein the bottom cover comprises a base and an annular portion with openings at both top and bottom 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, wherein the heating element assembly comprises a heat insulating shell and a hanging piece, the hanging piece is connected to the top of the heating element, the heat insulating shell comprises a platform and a shell having 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.

14. An aerosol generating device, comprising the heating element assembly according to any one of claims 1 to 13.

Images