Heating assembly and aerosol generating device

Abstract

The embodiment of the invention discloses a heating assembly and an aerosol generating device, the heating assembly comprises a base body, the base body is provided with a first surface and a second surface which are oppositely arranged, and an air channel communicating the first surface with the second surface, and the base body is used for heating air in the air channel, further heating the aerosol generating product by using the heated air; and the air channel is constructed to be capable of guiding air to flow from the first surface to the second surface and preventing the air from flowing from the second surface to the first surface. By means of the mode, the air channel can prevent hot air from flowing back, so that the air channel plays a role of a check valve, and heat loss caused by hot air flowing back can be relieved.

Description

[Technical field]

[0001] The embodiments of the present application relate to the field of aerosol technology, and in particular to a heating component and an aerosol generating device. [Background technology]

[0002] Traditional tobacco products (e.g., cigarettes, cigars, etc.) burn tobacco to generate tobacco smoke during use. In the prior art, there are products that release compounds by heating without burning to replace these traditional tobacco products. Examples of such products are aerosol generating devices, which generally include a heating component that is used to heat the aerosol generating product so that part of the active substance inside the aerosol generating product is volatilized by heat to generate an aerosol, and the user can inhale the aerosol by inhaling on the aerosol generating product.

[0003] The heating method of the existing heating component includes an air heating method. This heating component usually includes a honeycomb structure provided with honeycomb holes. The honeycomb holes serve as air channels for air to pass through the honeycomb structure. When the air flows through the honeycomb holes, the air can be heated to form a hot air flow, and then the aerosol generation product is heated by the hot air flow. [Summary of the invention]

[0004] The embodiment of the present application provides a heating component to solve the technical problem that when an aerosol generating device uses an air heating method, hot air flow will flow back through the air channel, resulting in partial heat loss.

[0005] A heating assembly is applied to an aerosol generating device to heat an aerosol generating product to generate an aerosol, comprising:

[0006] a substrate having a first surface and a second surface disposed opposite to each other, and an air passage connecting the first surface and the second surface, wherein the substrate is used to heat the air in the air passage, so that the heated air heats the aerosol generating article;

[0007] The air channel is configured to guide air to flow from the first surface to the second surface and prevent air from flowing from the second surface to the first surface.

[0008] In one embodiment, the air channel includes a main air channel connecting the first surface and the second surface, and at least one check air channel connected to the main air channel, and the check air channel is configured so that when the air flows from the second surface to the first surface, at least a portion of the air enters the check air channel and collides with the air in the main air channel when escaping from the check air channel.

[0009] In one embodiment, the main air passage includes a plurality of linear sections connected in sequence, and the check air passage includes an arcuate section connected between any two adjacent linear sections, thereby configuring the air passage into a Tesla valve shape.

[0010] In one embodiment, the main air duct extends longitudinally between the first surface and the second surface, and the check air duct includes a first part and a second part connected to the first part, the first part bends and extends from the main air duct toward the first surface, and the second part bends and extends from the first part toward the second surface and is connected to the main air duct.

[0011] In one embodiment, the non-return air passage comprises a plurality of non-return air passages, and the plurality of non-return air passages surround the main air passage.

[0012] In one embodiment, the air channel includes a first portion extending to the first surface and a second portion extending to the second surface, and a third portion located between the first portion and the second portion, the inner diameter of the third portion is larger than the inner diameters of the first portion and the second portion, the third portion is provided with a blocking portion, the blocking portion is configured to block air from flowing from the second portion to the first portion, and defines a gap with the inner wall of the third portion to guide air to flow from the first portion to the second portion.

[0013] In one of the embodiments, the material of the substrate includes an electrothermal material, and the substrate also includes a conductive electrode for conducting electrical energy.

[0014] In one embodiment, the substrate has a resistance of 0.5 ohms to 3 ohms.

[0015] In one embodiment, the heating assembly includes a heating element, which is used to generate heat and transfer the heat to the substrate, so that the substrate heats the air in the air channel.

[0016] In one embodiment, the base is formed with a receiving chamber, and the heating element passes through the first surface and is at least partially received in the receiving chamber.

[0017] In one embodiment, the receiving chamber extends along the axial direction of the base, or the receiving chamber is located in the central area of ​​the base.

[0018] In one embodiment, the heating element is adjacent to the second surface when received in the receiving chamber.

[0019] In one embodiment, the heating element extends through the first surface and the second surface such that at least a portion of the heating element can be inserted into the aerosol-generating article.

[0020] In one embodiment, the receiving chamber avoids the air passage.

[0021] In one embodiment, the heating assembly further comprises a hollow cylindrical body, the substrate is positioned in the cylindrical body, and the cylindrical body is used to accommodate at least a portion of the aerosol generating article.

[0022] In one embodiment, a coil is wrapped around the outer surface of the cylindrical body, the coil is used to generate a changing magnetic field, a hollow sensing body is arranged in the cylindrical body, the substrate is positioned in the sensing body, and the sensing body is configured to be penetrated by the changing magnetic field and generate heat;

[0023] Alternatively, an infrared electrothermal coating is attached to the outer surface of the cylindrical body, and the substrate is configured to absorb infrared rays released by the infrared electrothermal coating to generate heat.

[0024] In one embodiment, a boss extends from the inner wall of the susceptor, and the boss is used to abut against the aerosol generating article, thereby maintaining a gap between the substrate and the aerosol generating article.

[0025] In one embodiment, the base and the cylindrical body are integrally formed, a conductive electrode is attached to the outer surface of the cylindrical body, and the material of the cylindrical body includes an electrothermal material.

[0026] An embodiment of the present application also provides an aerosol generating device, comprising the heating component described in the above embodiment, and a power supply unit for providing electrical energy to the heating component.

[0027] The heating assembly provided in the above embodiment designs the air channel in the base of the heating assembly to prevent the hot air flow from flowing back, so that the air channel acts as a check valve, thereby alleviating the heat loss caused by the hot air flow flowing back.

Brief Description of the Drawings

[0028] One or more embodiments are exemplarily described by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and the figures in the drawings do not constitute proportional limitations unless otherwise stated.

[0029] Figure 1 A schematic diagram of the structure of an aerosol generating device provided in one embodiment of the present application;

[0030] Figure 2 for Figure 1 A three-dimensional schematic diagram of the base of the heating component in one direction;

[0031] Figure 3 An embodiment of the present application provides Figure 2 A schematic diagram of the structure of the air channel of the middle matrix;

[0032] Figure 4 For airflow Figure 3 Schematic diagram of the flow in another direction of the air channel;

[0033] Figure 5 Another embodiment of the present application provides Figure 2 A schematic diagram of the structure of the air channel of the middle matrix;

[0034] Figure 6 For airflow Figure 5 Schematic diagram of the flow in another direction of the air channel;

[0035] Figure 7 A three-dimensional schematic diagram of a heating assembly provided in one embodiment of the present application in one direction;

[0036] Figure 8 A schematic diagram of an exploded view of a heating assembly provided in another embodiment of the present application at a viewing angle;

[0037] Fig. 9 for Figure 8 Schematic diagram of the cross section when not exploded;

[0038] Fig.10 for Fig. 9 A schematic diagram of the structure in which the heating element penetrates the substrate;

[0039] Fig.11 A schematic cross-sectional view of a heating assembly in one direction provided in yet another embodiment of the present application;

[0040] Fig.12 A schematic diagram of the air channel structure of a substrate provided in another embodiment of the present application. [Specific implementation method]

[0041] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" / "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "upper", "lower", "left", "right", "inside", "outside" and similar expressions used in this specification are for illustrative purposes only.

[0042] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0043] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0044] In the embodiments of the present application, the "installation" includes fixing or restricting a component or device to a specific position or place by welding, screwing, clamping, bonding, etc. The component or device can remain stationary at the specific position or place or move within a limited range. After the component or device is fixed or restricted to a specific position or place, it may or may not be disassembled, and there is no limitation in the embodiments of the present application.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] An embodiment of the present application provides an aerosol generating device 100, such as Figure 1 As shown, the aerosol generating device 100 includes a power supply unit 10, a main board 20 and a heating assembly 30. The main board 20 is provided with a controller of the aerosol generating device 100. The power supply unit 10 and the heating assembly 30 are electrically connected to the controller respectively, so that the controller can control the power supply unit 10 to provide electric energy to the heating assembly 30. The aerosol generating device 100 is also provided with a longitudinally extending chamber 40, and the chamber 40 is used to accommodate an aerosol generating product 200 used in conjunction with the aerosol generating device 100. When the aerosol generating product 200 is accommodated in the chamber 40, the heating assembly 30 can heat the aerosol generating product 200, and part of the active material filled in the aerosol generating product 200 can volatilize under heat to generate an aerosol, and the user can inhale the aerosol by inhaling on the aerosol generating product 200. Among them, the power supply unit 10 is a rechargeable battery cell or a non-rechargeable battery cell.

[0047] The aerosol generating article 200 preferably uses a tobacco-containing material that releases volatile compounds from the article when heated; or it can also be a non-tobacco material that can be heated and suitable for electric heating and smoking. The aerosol generating article 200 preferably uses a solid substrate, which can include one or more of powder, particles, fragments, strips or sheets of one or more of herb leaves, tobacco leaves, homogenized tobacco, and expanded tobacco; or the solid substrate can contain additional tobacco or non-tobacco volatile flavor compounds to be released when the substrate is heated.

[0048] like Figure 2 As shown, the heating component 30 includes a substrate 31, which is roughly cylindrical in shape, for example, a cylinder or a prism, and has a first surface 311 and a second surface 312 that are relatively arranged, and an air channel 313 connecting the first surface 311 and the second surface 312. The aerosol generating device 100 is provided with an air inlet 50 for external air to enter, the first surface 311 faces the air inlet 50, and the second surface 312 can be used to support the aerosol generating product 200, that is, when the aerosol generating product 200 is accommodated in the chamber 40, the aerosol generating product 200 and the second surface 312 abut against each other, so that the second surface 312 provides support for the aerosol generating product 200.

[0049] When the user inhales on the aerosol generating product 200, external air enters the aerosol generating device 100 through the air inlet 50, and then enters the air channel 313 of the substrate 30 through the internal air flow channel 60. The substrate 313 heats the air in the air channel 313 to form a hot air flow. After escaping from the second surface 312, the hot air flow can enter the aerosol generating product 200, and heat the active substance in the aerosol generating product 200 so that part of the active substance inside is volatilized by heat, thereby generating an aerosol in the aerosol generating product 200.

[0050] In some embodiments, Figure 3 and Figure 4 As shown, the air channel 313 is configured in the shape of a Tesla valve. Specifically, the Tesla valve-shaped air channel 313 includes a plurality of linear segments 3131 that are connected in sequence. The plurality of linear segments 3131 that are connected in sequence form a main airway of the air channel 313. Figure 3 As shown by the arrow route R1 , the main air passage R1 connects the first surface 311 and the second surface 312 of the substrate 31 . Air can flow from the first surface 311 to the second surface 312 along the main air passage R1 , or flow from the second surface 312 to the first surface 311 .

[0051] To prevent the hot air flow in the air channel from flowing back, that is, to prevent the hot air flow from flowing from the second surface 31 to the first surface 311, thereby causing heat loss, the air channel 313 also includes a check air passage 3132, which is used to prevent the hot air flow from flowing from the second surface 312 to the first surface 311. Specifically, Figure 3 and Figure 4 As shown, any two adjacent straight sections 3131 form an angle, that is, any two adjacent straight sections 3131 are not connected in a straight line, and the non-return air channel 3132 includes an arc section connected between any two adjacent straight sections 3131, and the air inlet and the air outlet of the non-return air channel 3132 are both connected to the main air channel 3131. When the user inhales on the aerosol generating article 200, the air channel 313 can guide the air to flow smoothly from the first surface 311 to the second surface 312 through the main air channel 3131, as shown in FIG. Figure 3 As shown by the arrow route R1 in the middle; when the heated air flows back from the second surface 312 to the first surface 311, part of the air enters the main air channel 3131, and part of the air enters the non-return air channel 3132. Since the non-return air channel 3132 is arc-shaped, the air flowing out of the non-return air channel 3132 will collide with the air in the main air channel 3131, thereby preventing the gas from continuing to flow from the second surface 312 to the first surface 311, as shown in FIG. Figure 4 As shown by the middle arrow route R2, the gas can be substantially prevented from flowing from the second surface 312 to the first surface 311 by the action of the multiple check air passages 3132. Therefore, by designing the air passage 313 into the shape of a Tesla valve, the hot air flow in the air passage can be prevented from flowing back, which greatly alleviates the heat loss caused by the hot air flow flowing back, thereby preventing the aerosol generating article 200 from being insufficiently heated due to insufficient heat, thereby affecting the smoking taste.

[0052] The arrangement of the air passage 313 is not limited to the shape of the Tesla valve. In some embodiments, for example, Figure 5 and Figure 6As shown, the air passage includes a main air passage 3131a extending longitudinally between the first surface 311 and the second surface 312, and a check air passage 3132a extending in a curved manner from the main air passage 3131a, the check air passage 3132a includes a first portion 31321a and a second portion 31322a communicating with the first portion 31321a, the first portion 31321a extending in a curved manner from the main air passage 3131a toward the direction close to the first surface 311, and the second portion 31322a extending in a curved manner from the first portion 31321a toward the direction close to the second surface 312. The first part 31321a bends and extends to be connected with the main airway 3131a, the first part 31321a forms the air inlet section of the check airway 3132a, and the second part 31322a forms the air outlet section of the check airway 3132a. The check airway 3132a of this shape can make the external air basically flow from the first surface 311 of the substrate 31 to the second surface 312 through the main airway 3131a when the user inhales on the aerosol generating product 200. That is to say, the main airway 3131a can guide the external air to flow smoothly from the first surface 311 to the second surface 312. Figure 5 When the heated air refluxes through the main air passage 3131a, part of the hot air flow entering the main air passage 3131a will enter the non-return air passage 3132a, and the air escaping from the non-return air passage 3132a will collide with the air in the main air passage 3131a, thereby partially preventing the hot air flow from continuing to flow from the second surface 312 to the first surface 311, as shown in FIG. Figure 6 The middle arrow shows route R2a.

[0053] Further in some embodiments, Figure 5 and Figure 6 As shown, the check air duct 3132a can be arranged in plurality, and the plurality of check air ducts 3132a surround the main air duct 3131a. When the hot air flow escapes from the plurality of check air ducts 3132a, it will collide with the hot air flow of the main air duct 3131a in the circumferential direction, which is beneficial to further preventing the hot air flow from flowing from the second surface 312 to the first surface 311, thereby effectively alleviating the heat loss caused by the backflow of the hot air flow.

[0054] Or in some embodiments, Fig.12As shown, the air channel includes a first portion 3131b extending to the first surface 311 and a second portion 3132b extending to the second surface 312, and a third portion 3133b located between the first portion 3131b and the second portion 3132b, the inner diameter of the third portion 3133b is larger than the inner diameters of the first portion 3131b and the second portion 3132b, so that a blocking portion 31331b can be provided in the third portion 3133b, the blocking portion 31331b is directly opposite to the air outlet of the second portion 3132b, and the blocking portion 31331b and the inner wall of the third portion 3133b define a gap 31332b, so that when the user inhales on the aerosol generating product 200, the external air flows from the first surface 311 to the second surface 312 through the first portion 3131b, the gap 31332b and the second portion 3132b, see Fig.12 When the heated airflow flows back from the second surface 312 to the first surface 311, the airflow hits the blocking portion 31331b and is returned, thereby preventing the airflow from flowing from the second surface 312 to the first surface 311, which alleviates the backflow of the hot airflow to a limited extent. Fig.12 The middle arrow shows route R2b.

[0055] It should be noted that the setting method of the air channel 313 is not limited to the method provided in the above embodiment. Those skilled in the art can make corresponding changes according to the specific application scenario. It is only necessary to enable the air channel 313 to guide the airflow from the first surface 311 to the second surface 312, while preventing the airflow from the second surface 312 to the first surface 311.

[0056] In some embodiments, Figure 7 As shown, the substrate 31 is made of an electric heating material that can generate heat when powered on, and a conductive electrode 314 is provided on the substrate 31. The conductive electrode 314 is electrically connected to the main board 20, so that the power supply unit 10 can provide electric energy to the substrate 31, and the substrate 31 generates heat under the action of the current. The electric heating material can be any one of graphite, metal, foam metal or ceramic. In order to make the substrate 31 generate appropriate heat when powered on, preferably, the resistance of the substrate 31 is between 0.5 ohms and 3 ohms.

[0057] In some embodiments, Figure 8-Figure 9As shown, the heating assembly 30 also includes a heating element 32 electrically connected to the mainboard 20. The heating element 32 can generate heat when powered on. A receiving chamber 315 connected to the first surface 311 is formed in the base 31. At least a portion of the heating element 32 passes through the first surface 311 and is accommodated in the receiving chamber 315 in an adaptive manner. Adaptation here means that the heating element 32 accommodated in the receiving chamber 315 is in full contact with the inner wall of the receiving chamber 35, so that the heat of the heating element 32 can be fully transferred to the base 31, so that the base 31 heats the air in the air channel 313. It should be noted that in order to prevent the hot air flow in the air channel 315 from leaking out through the receiving chamber 315 and causing heat loss, the receiving chamber 315 is arranged away from the air channel 313, that is, the receiving chamber 315 and the air channel 313 are isolated and not connected to each other.

[0058] The substrate 31 is made of a material with high thermal conductivity so as to efficiently conduct the heat of the heating element 32 inside the substrate 31, thereby uniformly heating the air in the air passage 313. The material with high thermal conductivity may be a metal or a ceramic material, and the ceramic material may be any one of oxides, nitrides, carbides, borides, etc.

[0059] Further in some embodiments, Figure 8 As shown, in order to evenly transfer the heat of the heating element 32 to the substrate 31, thereby evenly heating the air in the substrate 31, the receiving chamber 315 extends along the axial direction of the substrate 31; and in some embodiments, the receiving chamber 315 is located in the central area of ​​the substrate 31.

[0060] Further in some embodiments, Fig. 9 As shown, when the heating element 32 is received in the receiving chamber 315 , the heating element 32 is also adjacent to the second surface 312 of the substrate 31 , so that the contact area between the heating element 32 and the substrate 31 is larger, and thus more heat of the heating element 32 can be transferred to the substrate 31 .

[0061] It should be noted that the receiving chamber 315 may not be provided in the base 31 , and the heating element 32 may be attached to the side surface of the base 31 in the form of a metal heating mesh, and the heat generated by the heating element 32 may also be transferred to the base 31 .

[0062] In some embodiments, Fig.10As shown, the heating element 32 penetrates the first surface 311 and the second surface 312 of the substrate 31, so that a portion of the heating element 32 is exposed to the substrate 31, so that the portion exposed to the substrate 31 can be inserted into the aerosol generating article 200 for auxiliary heating to improve the heating efficiency. And in some embodiments, in order to facilitate the insertion of the heating element 32 into the aerosol generating article 200, the exposed end of the heating element 32 can be configured as a pin or a sheet.

[0063] In some embodiments, Fig.11 As shown, the heating assembly 30 includes a hollow cylindrical body 33 with two ends open, the aerosol generating product 200 can be partially accommodated in the cylindrical body 33 from one end of the cylindrical body 33, and the substrate 31 can be accommodated in the cylindrical body 33 from the other end of the cylindrical body 33. By providing the cylindrical body 33, the heat of the substrate 31 is not easily dissipated, which is beneficial to heating the air in the air channel 313. The cylindrical body 33 can be made of PEEK material. The PEEK material has high temperature resistance and is relatively stable at high temperatures and is not easy to deform. The PEEK material has good thermal insulation performance and can effectively maintain the heat of the substrate 31.

[0064] Further in some embodiments, Fig.11 As shown, the outer surface of the cylindrical body 33 is surrounded by a coil 331, and the coil 331 is electrically connected to the main board 20, so that the controller on the main board 20 can control the supply of alternating current to the coil 331, and the coil 331 generates an alternating magnetic field under the action of the alternating current. At the same time, a hollow sensing body 332 is arranged in the cylindrical body 33, and the base body 31 is arranged in the sensing body 332. The sensing body 332 is configured to be penetrated by the alternating magnetic field to induce eddy currents, and then generate heat under the action of eddy current effect and hysteresis effect, and the heat is further transferred to the base body 31.

[0065] Suitable materials for the susceptor 332 may be any one of graphite, molybdenum, silicon carbide, stainless steel, niobium, aluminum, nickel, iron, copper, nickel-containing compounds, titanium, and metal material composites. In some embodiments, in order to better induce eddy currents to improve heating efficiency, the material of the heating element 30 is preferably made of ferromagnetic material or composed of ferromagnetic materials, such as ferrite iron, ferromagnetic alloys (such as ferromagnetic steel or stainless steel), ferromagnetic particles, and ferrites.

[0066] Further in some embodiments, Fig.11As shown, a boss 3321 extends laterally from the inner surface of the sensing body 332, and the boss 3321 is used to abut against the aerosol generating product 200, that is, when the aerosol generating product 200 is accommodated in the cylindrical body 33, the boss 3321 abuts against the aerosol generating product 200, thereby limiting the depth of the aerosol generating product 200 extending into the cylindrical body 33, so that a certain gap is maintained between the aerosol generating product 200 and the substrate 31, avoiding direct contact between the aerosol generating product 200 and the substrate 31, thereby preventing the aerosol generating product 200 from being over-baked and generating odor.

[0067] And in some embodiments, the outer surface of the cylindrical body 33 may also be attached with an infrared electrothermal coating, which is electrically connected to the main board 20 to receive electric power to generate heat, thereby generating infrared rays of a certain wavelength. When the wavelength of the infrared rays matches the absorption wavelength of the substrate 31, the energy of the infrared rays is easily absorbed by the substrate 31, thereby generating heat on the substrate 31, thereby heating the substrate 31 by infrared heating. At the same time, when the aerosol generating product 200 is accommodated in the cylindrical body 33, the infrared rays generated by the infrared electrothermal coating can also be absorbed by the aerosol generating product 200, so that the infrared electrothermal coating can also directly heat the aerosol generating product 200, and then the aerosol generating product 200 can be heated and volatilized under the joint heating action of the hot air flow and the infrared electrothermal coating to achieve a better smoking taste. In order to enable the substrate 31 to fully absorb infrared rays and generate sufficient heat, the material of the substrate 31 is preferably made of graphite.

[0068] In some embodiments, the cylindrical body 33 and the base 31 may be integrally formed, and the cylindrical body 33 is made of an electric heating material that generates heat when electricity is supplied. In this case, a conductive electrode (not shown) may be attached to the outer wall of the cylindrical body 33. The conductive electrode may circumferentially surround the outer wall of the cylindrical body 33, or may extend longitudinally on the outer wall of the cylindrical body 33. The heat generated on the cylindrical body 33 may be transferred to the base 31, thereby causing the base 31 to heat the air in the air channel.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Under the concept of the present application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present application as described above, which are not provided in detail for the sake of simplicity. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A heating assembly, applied to an aerosol generating device, for heating an aerosol generating product to generate an aerosol, characterized in that: include: a substrate having a first surface and a second surface disposed opposite to each other, and an air passage connecting the first surface and the second surface, wherein the substrate is used to heat the air in the air passage, so that the heated air heats the aerosol generating article; The air channel is configured to guide air to flow from the first surface to the second surface and prevent air from flowing from the second surface to the first surface.

2. The heating assembly according to claim 1, characterized in that The air passage includes a main air passage connecting the first surface and the second surface, and at least one check air passage connected to the main air passage, wherein the check air passage is configured such that when the air flows from the second surface to the first surface, at least a portion of the air enters the check air passage and collides with the air in the main air passage when escaping from the check air passage.

3. The heating assembly according to claim 2, characterized in that The main air passage includes a plurality of linear sections connected in sequence, and the non-return air passage includes an arcuate section connected between any two adjacent linear sections, thereby configuring the air passage into a Tesla valve shape.

4. The heating assembly according to claim 2, characterized in that: The main air passage extends longitudinally between the first surface and the second surface, and the check air passage includes a first part and a second part connected to the first part, the first part bends and extends from the main air passage toward the first surface, and the second part bends and extends from the first part toward the second surface and is connected to the main air passage.

5. The heating assembly according to claim 4, characterized in that The check air passage includes a plurality of check air passages, and the plurality of check air passages surround the main air passage.

6. The heating assembly according to claim 1, characterized in that The air channel includes a first portion extending to the first surface, a second portion extending to the second surface, and a third portion located between the first portion and the second portion, wherein an inner diameter of the third portion is greater than an inner diameter of the first portion and the second portion, and the third portion is provided with a blocking portion, wherein the blocking portion is configured to block air from flowing from the second portion to the first portion, and defines a gap with an inner wall of the third portion for guiding air to flow from the first portion to the second portion.

7. The heating assembly according to claim 1, characterized in that The material of the substrate includes an electrothermal material, and the substrate also includes a conductive electrode for conducting electrical energy.

8. The heating assembly according to claim 7, characterized in that The substrate has a resistance value of 0.5 ohms to 3 ohms.

9. The heating assembly according to claim 1, characterized in that The heating assembly includes a heating element, which is used to generate heat and transfer the heat to the substrate, so that the substrate heats the air in the air channel.

10. The heating assembly according to claim 9, characterized in that The base is formed with a receiving chamber, and the heating element passes through the first surface and is at least partially received in the receiving chamber.

11. The heating assembly according to claim 10, characterized in that The receiving chamber extends along the axial direction of the base, or the receiving chamber is located in the central area of ​​the base.

12. The heating assembly according to claim 10, characterized in that The heating element is adjacent to the second surface when received in the receiving chamber.

13. The heating assembly according to claim 10, characterized in that The heating element extends through the first surface and the second surface to enable at least a portion of the heating element to be inserted into the aerosol-generating article.

14. The heating assembly according to claim 10, characterized in that The receiving chamber avoids the air passage.

15. The heating assembly according to claim 1, characterized in that The heating assembly further comprises a hollow cylindrical body, the substrate is positioned in the cylindrical body, and the cylindrical body is used to receive at least a portion of the aerosol generating article.

16. The heating assembly according to claim 15, characterized in that The outer surface of the cylindrical body is surrounded by a coil, the coil is used to generate a changing magnetic field, a hollow sensing body is arranged in the cylindrical body, the substrate is positioned in the sensing body, and the sensing body is configured to be penetrated by the changing magnetic field and generate heat; Alternatively, an infrared electrothermal coating is attached to the outer surface of the cylindrical body, and the substrate is configured to absorb infrared rays released by the infrared electrothermal coating to generate heat.

17. The heating assembly according to claim 16, characterized in that A boss extends from the inner wall of the susceptor, and the boss is used to abut against the aerosol generating product, thereby maintaining a gap between the substrate and the aerosol generating product.

18. The heating assembly according to claim 15, characterized in that The base and the cylindrical body are integrally formed, a conductive electrode is attached to the outer surface of the cylindrical body, and the material of the cylindrical body includes an electric heating material.

19. An aerosol generating device, characterized in that: It comprises the heating component according to any one of claims 1 to 18, and a power supply unit for providing electrical energy to the heating component.

Images