Heat generating body and aerosol generating device

Abstract

This application relates to the field of aerosol generation technology, and provides a heating element and an aerosol generating device. The heating element includes a substrate and conductive lines. A heating chamber is provided within the substrate to contain an aerosol matrix. The conductive lines are disposed on the substrate and include multiple conductive parts and multiple heating parts. The heating parts are spaced apart, and adjacent heating parts are electrically connected through the conductive parts. The heating parts generate heat. The conductive lines have at least two heating zones, and the power density of the conductive lines in different heating zones is different. In the aerosol generating device of this application, aerosols are more easily generated in the heating zone with high power density in the initial heating stage, while aerosols are generated slowly in the heating zone with low power density. In the later heating stage, the aerosols in the high-power heating zone are almost completely released, while the aerosols in the low-power heating zone can still generate aerosols due to the slow release rate, thereby improving the continuity of aerosol generation.

Description

Technical Field

[0001] This application relates to the field of aerosol generation technology, specifically to a heating element and an aerosol generating device. Background Technology

[0002] An aerosol generating device is a device that heats an aerosol matrix to generate aerosols. Typically, an aerosol generating device has a heating chamber, which is heated by inserting the aerosol matrix into the heating chamber, with the inner wall of the chamber in thermally conductive contact with the aerosol matrix.

[0003] However, when the heating chamber heats the aerosol matrix, too much aerosol is generated in the early stage of heating and too little in the later stage, resulting in poor continuity of aerosol generation and a poor user experience. Utility Model Content

[0004] This application provides a heating element and an aerosol generating device, which can solve the problem of poor continuity of aerosol generation during the heating process.

[0005] To address the aforementioned technical problems, this application provides a heating element comprising a substrate and conductive circuitry. The substrate contains a heating cavity for containing an aerosol matrix. The conductive circuitry is disposed on the substrate and includes multiple conductive portions and multiple heating portions. The heating portions are spaced apart, and adjacent heating portions are electrically connected through the conductive portions. The heating portions generate heat. The conductive circuitry has at least two heating zones, with different power densities within the different heating zones.

[0006] In one embodiment, at least a portion of each heating zone is arranged along the axial direction of the substrate.

[0007] In one embodiment, the spacing between the heating elements in different heating zones is different.

[0008] In one embodiment, there are two heating zones, namely a first heating zone and a second heating zone. One end of the heating chamber has a socket for inserting an aerosol matrix into the heating chamber. The first heating zone is located close to the socket, and the second heating zone is located away from the socket. The distance between the heating elements of the first heating zone is smaller than the distance between the heating elements of the second heating zone.

[0009] In one embodiment, the projection of the heating element of the first heating zone onto the radial cross-section of the substrate is the first projection, and the projection of the heating element of the second heating zone onto the radial cross-section is the second projection, with at least a portion of the second projection overlapping the first projection.

[0010] Alternatively, in the axial direction of the substrate, at least a portion of the heating element of the second heating zone is aligned with the gap between the heating element of the first heating zone.

[0011] In one embodiment, multiple heating elements are arranged in parallel to each other.

[0012] In one embodiment, the conductive circuit has a first end and a second end in the direction of current flow, and the heating element further includes a first electrode and a second electrode, which are respectively used to connect to the positive and negative terminals of the power supply. The first electrode is conductively connected to the first end, and the second electrode is conductively connected to the second end.

[0013] To address the aforementioned technical problems, this application provides an aerosol generating device, which includes the heating element provided in any of the above embodiments.

[0014] In one embodiment, the aerosol generating device further includes a rotating component, at least a portion of which is disposed within a heating chamber for driving the aerosol matrix to rotate in the circumferential direction of the substrate.

[0015] In one embodiment, the aerosol generating device further includes a housing assembly and an aerosol matrix, with a heating element assembled inside the housing assembly; the outer surface of the aerosol matrix and / or the outer surface of the housing assembly are provided with rotation indicator marks to prompt the user to rotate the aerosol matrix.

[0016] This application provides a heating element and an aerosol generating device, wherein the heating element includes a substrate and conductive lines. A heating chamber is provided within the substrate to contain an aerosol matrix. The conductive lines are disposed on the substrate and include multiple conductive parts and multiple heating parts, spaced apart and electrically connected via conductive parts to generate heat. The conductive lines have at least two heating zones, with different power densities in the different heating zones. Compared to a solution where the power density of the entire conductive line is uniform, the different power densities in the different heating zones of this application allow for easier aerosol generation in the high-power-density heating zone at the beginning of heating, while aerosol generation is slower in the low-power-density heating zone. In the later stages of heating, the aerosol in the high-power-density heating zone is almost completely released, while the aerosol in the low-power-density heating zone can still generate aerosol due to its slower release rate. This extends the effective suction time, balances the problem of excessive aerosol release differences between the beginning and end stages, improves the continuity of aerosol generation, and enhances the user experience. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an aerosol generating device provided in an embodiment of this application;

[0018] Figure 2 This is a cross-sectional view of an aerosol generating apparatus provided in an embodiment of this application;

[0019] Figure 3This is a schematic diagram of the unfolded structure of a heating element provided in an embodiment of this application;

[0020] Figure 4 This is a schematic diagram of the unfolded structure of a heating element provided in another embodiment of this application;

[0021] Figure 5 This is a schematic diagram of the structure of an aerosol generating device provided in another embodiment of this application.

[0022] Reference numerals: heating element 10, heating cavity 11, socket 111, base 12, conductive line 13, first end 131, second end 132, conductive part 133, heating part 134, first end heating part 1341, second end heating part 1342, intermediate heating part 1343, first heating area 135, second heating area 136, first electrode 14, second electrode 15, contact plate 16, housing assembly 20, aerosol matrix 40, rotation indicator mark 50. Detailed Implementation

[0023] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0024] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0025] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0026] The terms "parallel" and "perpendicular," etc., are specific to the current technological level, not absolute mathematical definitions. Slight deviations are permissible; approximations of parallelism or perpendicularity are acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, with the angle between A and B ranging from 0° to 10°. Similarly, "A and B are perpendicular" means that A and B are perpendicular or approximately perpendicular, with the angle between A and B ranging from 80° to 100°. The directional terms used in the embodiments of this application, such as "upper," "inner," "outer," and "side," are merely for reference to the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0027] Please refer to Figure 1 and Figure 2 This application provides an aerosol generating device, which includes a heating element 10. Furthermore, the aerosol generating device may also include a housing assembly 20, a power supply, and a controller. The housing assembly 20 has a mounting cavity, within which the heating element 10, the power supply, and the controller are all mounted. The power supply provides power to the heating element 10, and the controller controls the heating of the heating element 10.

[0028] The heating element 10 has a heating cavity 11 inside, and one end of the heating cavity 11 has a socket 111 for inserting the aerosol matrix 40 into the heating cavity 11. The side of the heating cavity 11 away from the socket 111 can be an open end or a closed end.

[0029] The aerosol matrix 40 includes at least a matrix segment, wherein the matrix segment is used to generate aerosols upon heating. In one embodiment, the aerosol matrix 40 further includes an encapsulation layer surrounding the matrix segment. The matrix segment is primarily composed of tobacco, herbal or plant leaves, or medicinal materials. It is understood that the materials forming the matrix segment are not limited; the matrix segment can be formed from a single material or from a mixture of multiple materials in different proportions.

[0030] The coating layer can be formed of a coating material such as paper, thereby maintaining the shape of the matrix segment. The material forming the coating layer is not limited to this; in other embodiments, the coating layer can also be formed of other materials such as aluminum foil to meet different requirements. In one embodiment, the aerosol matrix 40 further includes a nozzle segment, a cooling segment, and a sealing segment, which are arranged sequentially along the axis of the matrix segment. The nozzle segment mainly has a filtering function, through which the user inhales the aerosol. The nozzle segment may contain a filter medium that can filter tar, suspended particles, etc., in the aerosol, thereby reducing unwanted substances in the aerosol inhaled by the user. The filter medium can be, for example, a polylactic acid filament tow or a cellulose acetate filament tow. The main function of the cooling segment is to reduce the temperature of the aerosol to prevent burns to the mouth. The cooling segment has a cooling channel, and the inner wall of the cooling channel has cooling holes communicating with the outside of the cooling segment. The sealing section is located at the end of the aerosol matrix 40 and serves as a physical support base to prevent particles or materials of the aerosol matrix 40 from loosening or falling off during heating, maintaining the integrity of the aerosol matrix 40 and avoiding leakage due to thermal expansion or movement of the matrix section, which would affect the user experience. Furthermore, if condensate is generated in the cooling section or matrix section, the fiber structure of the sealing section can prevent the liquid from flowing out of the aerosol matrix 40. In addition, the sealing section can control airflow resistance through fiber density to ensure smooth suction. The sealing section can be made of materials such as polypropylene fiber, polyester fiber, cotton, or cellulose acetate. In other embodiments, the aerosol matrix 40 may not have at least one of the cooling section, sealing section, or nozzle section, or it may have other functional sections, which will not be elaborated here.

[0031] Please refer to Figure 3 and Figure 4 , Figure 3 and Figure 4 This is an unfolded view of the heating element 10. The heating element 10 includes a substrate 12 and conductive lines 13. A heating cavity 11 is provided within the substrate 12 to accommodate the aerosol matrix 40. The substrate 12 can be made of an insulating material to prevent short circuits between the conductive lines 13. Alternatively, the substrate 12 can be made of a non-insulating material, but an insulating layer must be formed on the surface of the substrate 12 before the conductive lines 13 are placed on the insulating layer. The material of the substrate 12 can be, but is not limited to, metal, ceramic, glass, etc. The substrate 12 is generally tubular, and the radial cross-section of the heating cavity 11 can be circular, elliptical, etc. When the aerosol matrix 40 is inserted into the heating cavity 11, the matrix section of the aerosol matrix 40 is located inside the heating cavity 11, allowing the heating element 10 to heat the matrix section. The suction nozzle section of the aerosol matrix 40 is located outside the housing assembly 20, allowing the user to draw and suck the suction nozzle section.

[0032] Please refer to Figure 3and Figure 4 The conductive line 13 is disposed on the substrate 12, and can be disposed on the outer or inner surface of the substrate 12. The conductive line 13 described in this application refers to a single line, meaning that the conductive line 13 is connected to only one pair of electrodes. For example, in one embodiment, the conductive line 13 has a first end 131 and a second end 132 in the current flow direction. The heating element 10 also includes a first electrode 14 and a second electrode 15, which are respectively used to connect to the positive and negative terminals of the power supply. For example, the first electrode 14 is used to connect to the positive terminal of the power supply, and the second electrode 15 is used to connect to the negative terminal of the power supply. The first electrode 14 is conductively connected to the first end 131, and the second electrode 15 is conductively connected to the second end 132. Generally, a contact plate 16 is provided on both the first electrode 14 and the second electrode 15. One end of the wire can be soldered to the contact plate 16, and the other end of the wire can be connected to the power supply, thereby electrically connecting the conductive line 13 to the power supply.

[0033] The conductive circuit 13 includes multiple conductive parts 133 and multiple heating parts 134. In this application, "multiple" generally refers to two or more. The conductive parts 133 are typically made of conductors with extremely low resistance, such as silver. Generally, the conductive parts 133 are made of the same material as the first electrode 14 and the second electrode 15. When the conductive parts 133, the first electrode 14, and the second electrode 15 are fabricated as a film structure using methods such as printing, the conductive parts 133, the first electrode 14, and the second electrode 15 can be printed in one printing process and sintered in one sintering process, reducing the need for multiple printing and sintering steps. The heating parts 134 can be, but are not limited to, thick-film heating films, heating plates, etc. The material of the heating parts 134 can be, for example, pure titanium, titanium alloy, iron-chromium-aluminum alloy, nickel-chromium alloy, or iron-nickel alloy.

[0034] Multiple heating elements 134 are spaced apart, meaning they are not directly physically connected but are electrically connected indirectly. Adjacent heating elements 134 are electrically connected via conductive parts 133. Specifically, the multiple heating elements 134 include a first end heating element 1341, a second end heating element 1342, and multiple intermediate heating elements 1343 spaced apart from each other. The first end heating element 1341 is electrically connected to the first electrode 14, and the second end heating element 1342 is electrically connected to the second electrode 15. Multiple intermediate heating elements 1343 are provided between the first end heating element 1341 and the second end heating element 1342 in the direction of current flow. Each intermediate heating element 1343 is electrically connected to the other via conductive parts 133. The intermediate heating element 1343 closest to the first end heating element 1341 is electrically connected to the first end heating element 1341 via conductive parts 133, and the intermediate heating element 1343 closest to the second end heating element 1342 is electrically connected to the second end heating element 1342 via conductive parts 133. When not electrically connected to an external power source, there is an open circuit between the first electrode 14 and the second electrode 15.

[0035] The heating element 134 is used to generate heat to heat the aerosol matrix 40, while the resistance of the conductive element 133 is much smaller than that of the heating element 134. The resistance of the conductive element 133 can be considered negligible. That is, the conductive element 133 is not considered to be able to generate heat, and its function can be considered to be only to provide a conductive connection.

[0036] The conductive line 13 has at least two heating zones, each including a conductive part 133 and a heating part 134. The power density of the conductive line 13 in different heating zones is different. That is, this application can design the position of each heating part 134 in multiple heating zones to make the power density of the conductive line 13 in each heating zone different. Here, power density refers to the heat released per unit area or unit volume per unit time (i.e., heating rate, the unit can be, for example, W / m²). 3 or W / m 2 The resistance distribution of each heating element 134 directly affects the power density in each heating zone, thereby affecting the heating rate of the aerosol matrix 40 region corresponding to the heating zone.

[0037] Compared to schemes where the power density of the entire conductive line 13 is uniform, the power density of the conductive line 13 in different heating zones of the conductive line 13 in this application is different. This makes it easier for the heating zone with high power density to generate aerosols in the early stage of heating, while the heating zone with low power density generates aerosols slowly. In the later stage of heating, the aerosols in the high power heating zone are almost completely released, while the aerosols in the low power density heating zone can still generate aerosols due to the slow release rate. This can extend the effective suction time, balance the problem of excessive difference in aerosol release between the early and late stages, improve the continuity of aerosol generation, and improve the user experience.

[0038] Since the various heating elements 134 in this application are actually connected in series, and power density is the ratio of power to volume or the ratio of power to area, the power is calculated according to the formula P = I. 2 Given R (where P is power, I is current, and R is resistance), in a series circuit, the current across all resistors is the same. Therefore, the higher the resistance per unit volume or area, the higher the power density per unit volume or area. Thus, in one embodiment, the resistance of each heating element 134 is the same, while the spacing between heating elements 134 in different heating zones varies. Since the heating elements 134 are connected in series, reducing the spacing between them increases the power density of that heating zone. In other embodiments, the resistance of heating elements 134 in different heating zones may differ, while the resistance of heating elements 134 in the same heating zone is the same, and the spacing between heating elements 134 in different heating zones is the same. Therefore, the higher the resistance within a heating zone, the higher the power density. The resistance of the heating element 134 can typically be improved by adjusting its length, width, thickness, resistivity, etc. Of course, more than one variable can be changed; multiple variables can be used to alter the power density between different heating zones.

[0039] For example in Figure 3 and Figure 4 In this embodiment, there are two heating zones: a first heating zone 135 and a second heating zone 136. The resistance of each heating element 134 in both the first and second heating zones 135 is the same. The spacing between the heating elements 134 in the first heating zone 135 is smaller than the spacing between the heating elements 134 in the second heating zone 136. Therefore, the power density of the first heating zone 135 is greater than the power density of the second heating zone 136.

[0040] In one embodiment, at least a portion of each heating zone is arranged along the axial direction of the substrate 12. For example, in Figure 3In one embodiment, a portion of the second heating zone 136 and the first heating zone 135 are arranged along the axial direction of the substrate 12. Specifically, one end of the heating cavity 11 has a socket 111 for inserting the aerosol matrix 40 into the heating cavity 11; the first heating zone 135 is located near the socket 111, and the second heating zone 136 is located away from the socket 111. Since the power density of the first heating zone 135 is greater than that of the second heating zone 136, that is, the power density of the heating element 10 near the socket 111 is higher, the conductive line 13 of the heating element 10 near the socket 111 can heat up faster after the conductive line 13 is energized. This allows the upper half of the substrate section to quickly generate aerosol in the initial heating stage, preventing insufficient aerosol generation in the first few suctions. In other embodiments, at least a portion of each heating zone can also be arranged along the circumferential direction of the substrate 12, for example, in Figure 4 In one embodiment, the first heating zone 135 and the second heating zone 136 are arranged along the circumference of the substrate 12.

[0041] In one embodiment, please refer to Figure 3 When the first heating zone 135 and the second heating zone 136 are axially distributed, the projection of the heating part 134 of the first heating zone 135 onto the radial cross-section of the substrate 12 is the first projection, and the projection of the heating part 134 of the second heating zone 136 onto the radial cross-section is the second projection. At least a portion of the second projection overlaps with the first projection, that is, at least a portion of the heating part 134 of the second heating zone 136 is aligned with the heating part 134 of the first heating zone 135 in the circumferential direction. Alternatively, in the axial direction of the substrate 12, at least a portion of the heating part 134 of the second heating zone 136 is aligned with the gap between the heating part 134 of the first heating zone 135. Thus, since the airflow flows from the second heating zone 136 to the first heating zone 135, the above structure allows for a certain correlation or complementarity between the first heating zone 135 and the second heating zone 136, making it easier to enhance the aerosol generation rate and quantity of the first heating zone 135.

[0042] In one embodiment, such as Figure 3 and Figure 4As shown, multiple heating elements 134 are arranged parallel to each other and connected by conductive parts 133. Since the conductive lines 13 extend in a curved or bent manner, if the heating elements 134 are also connected by lines of the same material, the current follows the principle of the shortest path, meaning that current tends to choose the path of least resistance when flowing in a circuit, and at bends, it tends to follow the path closer to the bend, resulting in uneven heating at bends and concentrated heating at the inner part of the bend. However, in this embodiment, by arranging the multiple heating elements 134 parallel to each other and connecting them by conductive parts 133, the resistance of the conductive parts 133 is negligible, and the potential is the same at all points on the conductive parts 133. Therefore, when the current flows on the conductive parts 133, it does not mainly flow from the inner part of the bend, but can flow evenly throughout the entire conductive parts 133, thereby improving the problem of concentrated heating.

[0043] In one embodiment, the aerosol generating device further includes a rotating assembly (not shown), at least a portion of which is disposed within the heating chamber 11 to drive the aerosol matrix 40 to rotate circumferentially around the substrate 12. Although the aerosol matrix 40 can still be baked to a certain extent even without rotation during baking, the baking is more uniform when the thermal conductivity of the substrate 12 is higher; the baking uniformity is even better when the thermal conductivity of the substrate 12 is greater than or equal to 20 W / (m·℃). However, because the heating elements 134 are spaced apart, there are relatively low-heat areas between them. Therefore, if the cigarette is rotated circumferentially along the aerosol matrix 40, the portion of the aerosol matrix 40 located in the gap between the heating elements 134 before rotation can overlap with the position of the heating elements 134 after rotation, making the baking of the aerosol matrix 40 more uniform. Therefore, this application can include a rotating component in the aerosol generating device. This rotating component can drive the aerosol matrix 40 to rotate circumferentially around the substrate 12 when preset conditions are met during the suction process. For example, the preset conditions could be a preset suction time or a preset number of suction cycles. The rotating component can drive the aerosol matrix 40 to rotate at a preset angle, and can also rotate the aerosol matrix 40 multiple times, resulting in more uniform baking. Of course, in other embodiments, the aerosol generating device may not include a rotating component, and the aerosol matrix 40 can be manually rotated by the user. The rotating component can be, for example, a rotatable clamping member that clamps the outer wall of the aerosol matrix 40 to rotate it; or, the rotating component can be a rotatable support member that supports the bottom of the aerosol matrix 40, thereby rotating the aerosol matrix 40.

[0044] In one embodiment, please refer to Figure 5The aerosol generating device includes a housing assembly 20 and an aerosol matrix 40, with a heating element 10 assembled inside the housing assembly 20. Rotation indicator marks 50 are provided on the outer surface of the aerosol matrix 40 and / or the outer surface of the housing assembly 20 to prompt the user to rotate the aerosol matrix 40, thereby increasing the interactivity and fun of the aerosol generating device and ensuring more uniform heating of the aerosol matrix 40. When the rotation indicator marks 50 are provided on the aerosol matrix 40, they should be positioned at the point where the aerosol matrix 40 protrudes from the housing assembly 20 after being inserted into the heating chamber 11, so that the user can see the rotation indicator marks 50 from the outside. When both the aerosol matrix 40 and the housing assembly 20 are provided with rotation indicator marks 50, the rotation indicator marks 50 can correspond to each other. For example, after the aerosol matrix 40 is rotated, the rotation indicator marks 50 of the aerosol matrix 40 and the housing assembly 20 can establish a new pairing or positional relationship.

[0045] The rotation prompt mark 50 can be text, graphics, etc., for example, in Figure 5 In this embodiment, two types of lines with preset spacing and different heights are provided on the aerosol matrix 40. Lines on the housing assembly 20, near the lines on the aerosol matrix 40, are aligned with the lines on the aerosol matrix 40. During suction, the user can first align the shorter lines of the aerosol matrix 40 with the lines on the housing assembly 20, and then align the longer lines of the aerosol matrix 40 with the lines on the housing assembly 20 after a period of suction. This allows the portion of the aerosol matrix 40 not covered by the heating element 134 before rotation to rotate to a position opposite to the heating element 134, thereby improving the uniformity of heating the aerosol matrix 40. Arrows indicating the rotation of the aerosol matrix 40 along the circumferential direction can be provided on the aerosol matrix 40 to further guide the user in rotating the aerosol matrix 40.

[0046] In other embodiments, the rotation indicator 50 can also be a temperature-sensitive display indicator, which is a mark that only appears after a certain temperature is reached. It can be designed so that when the user does not rotate the cigarette, only a portion of the temperature-sensitive display pattern is visible, and the entire pattern must be displayed only after rotating the cigarette more than once.

[0047] The above examples illustrate this application only to aid understanding and are not intended to limit its scope. Those skilled in the art to which this application pertains can make various simple deductions, modifications, or substitutions based on the ideas presented.

Claims

1. A heating element, characterized in that, include: The matrix has a heating chamber inside, which is used to contain the aerosol matrix; A conductive circuit is disposed on the substrate. The conductive circuit includes multiple conductive parts and multiple heating parts. The multiple heating parts are spaced apart and adjacent heating parts are electrically connected through the conductive parts. The heating parts are used to generate heat. The conductive line has at least two heating zones, and the power density of the conductive line in different heating zones is different.

2. The heating element according to claim 1, characterized in that, At least a portion of each of the heating zones is arranged along the axial direction of the substrate.

3. The heating element according to claim 1 or 2, characterized in that, The spacing between the heating elements in different heating zones is different.

4. The heating element according to claim 2, characterized in that, There are two heating zones, namely a first heating zone and a second heating zone. One end of the heating cavity has a socket for inserting the aerosol matrix into the heating cavity. The first heating zone is located close to the socket, and the second heating zone is located away from the socket. The distance between the heating elements in the first heating zone is smaller than the distance between the heating elements in the second heating zone.

5. The heating element according to claim 4, characterized in that, The projection of the heating element of the first heating zone onto the radial cross-section of the substrate is a first projection, and the projection of the heating element of the second heating zone onto the radial cross-section is a second projection, with at least a portion of the second projection overlapping the first projection; Alternatively, in the axial direction of the substrate, at least a portion of the heating element of the second heating zone is aligned with the gap between the heating element of the first heating zone.

6. The heating element according to claim 1, characterized in that, The multiple heating elements are arranged in parallel to each other.

7. The heating element according to claim 1, characterized in that, The conductive circuit has a first end and a second end in the direction of current flow. The heating element also includes a first electrode and a second electrode. The first electrode and the second electrode are respectively used to connect to the positive and negative terminals of the power supply. The first electrode is conductively connected to the first end, and the second electrode is conductively connected to the second end.

8. An aerosol generating device, characterized in that, Includes the heating element as described in any one of claims 1-7.

9. The aerosol generating apparatus according to claim 8, characterized in that, The aerosol generating device further includes a rotating component, at least a portion of which is disposed within the heating chamber to drive the aerosol matrix to rotate in the circumferential direction of the substrate.

10. The aerosol generating apparatus according to claim 8, characterized in that, The aerosol generating device further includes a housing assembly and an aerosol matrix, with the heating element assembled inside the housing assembly; the outer surface of the aerosol matrix and / or the outer surface of the housing assembly are provided with rotation indicator marks to prompt the user to rotate the aerosol matrix.

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