Heating element and its control method, aerosol generating device

Abstract

This invention provides a heating element and its control method, as well as an aerosol generating device. The heating element comprises multiple metal segments connected end-to-end, with conductive pins externally connected at the connection points. The first and last metal segments are each externally connected to conductive pins; a conductive path can be formed between any two conductive pins. The heating element employs a dual mode of heating both individual heating segments and combined heating segments, improving the problem of insufficient tobacco substrate baking caused by low temperatures at both ends when heating individual heating segments. This ensures that the tobacco substrate covered by the heating element is fully heated and baked, improving the utilization rate of the tobacco substrate.

Description

Technical Field

[0001] This invention relates to the field of heating element technology, and in particular to a heating element and its control method, and an aerosol generating device. Background Technology

[0002] Heated cigarette aerosol products, as an alternative to traditional tobacco products, promote the release of active substances from the tobacco matrix to form aerosols through heating and baking rather than combustion, effectively reducing the health risks associated with combustion products. Most existing aerosol products use stick-shaped cigarettes, and their heating elements often employ an integrated heating structure, such as a heating tube surrounding the cigarette or a rod (plate)-shaped heating element inserted into the stick-shaped cigarette.

[0003] Heating and baking utilizes a heating element to convert electrical energy into heat energy. When aerosol products are heated to a certain temperature, they release active substances to form aerosols. Aerosol products often release more substances in the first half of the process and less in the second half, resulting in inconsistent taste.

[0004] Currently, to improve the consistency of taste during the inhalation of aerosol products, some studies have broken down the heating element into multiple independent units, controlling different units to heat different parts of the aerosol product separately in a time sequence to achieve a slow-release effect. However, due to the characteristic of the heating element having a high temperature in the middle and a low temperature at both ends, the above heating method results in uneven heating of the aerosol product in the heating blind area, insufficient roasting of the tobacco matrix, and low utilization of tobacco materials. Summary of the Invention

[0005] This invention provides a heating element and its control method, as well as an aerosol generating device, to solve the technical problem that the heating method of aerosol products in the prior art has a heating blind zone, resulting in uneven heating and insufficient baking.

[0006] To achieve the above objectives, the technical solution provided by the present invention is as follows: In a first aspect, the present invention provides a heating element comprising a plurality of metal segments connected end to end in sequence, with conductive pins externally connected at the connection points; the first and last metal segments are respectively externally connected with conductive pins; a conductive path can be formed between any two conductive pins.

[0007] Furthermore, the cross-sectional shape of the metal segment is selected from one or more of line segments, broken lines, and curves; the shape of the heating element is selected from one or more of sheet-like, columnar, and barrel-like shapes.

[0008] A second aspect of the present invention provides a method for controlling the above-mentioned heating element, comprising the steps of: supplying electrical energy to a single metal segment through adjacent conductive pins, and supplying electrical energy to a combination of at least two metal segments through non-adjacent conductive pins.

[0009] Furthermore, power is supplied to each pair of adjacent conductive pins until each first heating segment meets a first preset condition; power is supplied to two conductive pins spaced apart by one conductive pin until each second heating segment meets a second preset condition; or, Power is supplied to the first metal segment until it meets a first preset condition; power is supplied to the second metal segment until it meets the first preset condition; power is supplied to the heating segment combination formed by the first and second metal segments until it meets a second preset condition; power is supplied to the third metal segment until it meets the first preset condition; power is supplied to the heating segment combination formed by the second and third metal segments until it meets the second preset condition; power is supplied to the Nth metal segment until it meets the first preset condition; power is supplied to the heating segment combination formed by the (N-1)th metal segment and the Nth metal segment until it meets the second preset condition.

[0010] Furthermore, the first preset condition and the second preset condition are respectively selected from one or more of the following: the duration of providing electrical energy exceeds a preset duration, the number of suction ports after providing electrical energy to the heating element is greater than a preset number of ports, the aerosol particle size index is lower than the expected value when suctioning after providing electrical energy to the heating element, and the aerosol smoke humidity is lower than a preset value when suctioning after providing electrical energy to the heating element.

[0011] Furthermore, while providing a second power to the next pair of adjacent conductive pins, each preceding pair of adjacent conductive pins maintains a first power, which is less than the second power.

[0012] Furthermore, the cross-section of the metal segment is a broken line or a curve, and the formula for calculating the second power is: Second power = k * preset baseline power / distribution density Where k is the power coefficient; the formula for calculating the distribution density is: Distribution density = path length of heating segment / area of ​​the smallest bounding rectangle occupied by the heating segment; The path length of the heating segment is the unfolded length of the conductive trajectory of the heating segment.

[0013] Furthermore, while providing a fourth power to the next pair of spaced conductive pins, each preceding pair of spaced conductive pins maintains a third power, which is less than the fourth power.

[0014] The third invention provides an aerosol generating device, comprising an aerosol matrix, a power supply device, and a heating element as described in claim 1 or 2, wherein the aerosol matrix is ​​disposed on at least one side of the heating element; the power supply device includes a power supply and a control module, wherein the control module is electrically connected to the power supply, and the control module is connected to the conductive pins of the heating element through electrical contact points disposed thereon to provide electrical energy to the metal segment or combination of metal segments corresponding to the conductive pins.

[0015] Furthermore, the aerosol generating device includes a support unit and a base, the heating element is fixed on the base, and the conductive pins are exposed on the base. The support unit is wrapped around the aerosol matrix, the heating element, and the base.

[0016] The heating element provided by this invention adopts a dual mode of heating the heating section individually and heating the heating section as a whole, which improves the problem of insufficient baking of tobacco matrix caused by the low temperature at both ends when heating the independent heating section. It can fully heat and bake the tobacco matrix covered by the heating element and improve the utilization rate of the tobacco matrix. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the heating element in the embodiments of this application; Figure 2 This is a disassembled schematic diagram of the aerosol generating device in the embodiments of this application; Figure 3 This is a schematic diagram of the aerosol generating device in the embodiments of this application.

[0019] Figure label: 1. Metal segment; 2. Conductive pin; 3. Aerosol matrix; 4. Base; 5. Power supply; 6. Support unit. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0022] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element 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 this application.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0024] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0025] Reference Figure 1 In a first aspect of the present application, a heating element is provided, including a plurality of metal segments 1 connected end to end in sequence, with conductive pins 2 externally connected at the connection points; the first metal segment 1 and the last metal segment 1 are respectively externally connected with conductive pins 2; a conductive path can be formed between any two conductive pins 2.

[0026] In this embodiment, two adjacent conductive pins 2 are connected, and the metal segment 1 between the two conductive pins 2 is a heating segment; two non-adjacent conductive pins 2 are connected, and the metal segment 1 between the two conductive pins 2 is combined to form a heating segment combination. Electrical energy can be supplied to the heating segment through the adjacent conductive pins 2, and electrical energy can be supplied to the heating segment combination through the non-adjacent conductive pins 2.

[0027] The heating principle of heating elements is resistance heating when electricity flows through them. When a section of resistor is heated, the temperature at the center of the resistor is higher than that of other areas. The temperature difference depends on the thermal conductivity of the material used in the resistor and the length of the resistor. Poor thermal conductivity and excessive length will both lead to a greater temperature difference between different areas after the resistor is energized. For resistor materials used in contact with aerosols in new tobacco products, the acidity / alkaliness of the aerosol matrix, the high-temperature environment, and the cost of the matrix must be fully considered. Suitable materials include iron-chromium-aluminum (FeCrA) and stainless steel with a Curie temperature greater than 350℃. FeCrA has a relatively high resistivity; given that the power source for the cigarette heating device is a battery, a large extended length is not necessary to achieve a suitable resistance value. Stainless steel, on the other hand, has a relatively low resistivity, requiring a larger extended length to obtain a suitable resistance value. However, both of these materials have relatively poor thermal conductivity, which inevitably leads to a larger temperature difference between the center of the resistor and other parts when heated.

[0028] Therefore, in this embodiment, the heating element is divided into smaller metal segments 1, reducing the temperature difference of a single metal segment 1 and improving the uniformity of the aerosol matrix 3 under heat baking. The connection area of ​​the two metal segments 1 is used as a series heating element by connecting the two metal segments 1 with conductive pins 2 at both ends of the metal segment 1. At this time, the connection area of ​​the metal segments 1 is a high temperature area. When a single metal segment 1 is heated, the aerosol matrix 3 that is not completely consumed in the area far from the center of the heating element can be fully consumed, thereby improving the utilization rate of tobacco.

[0029] Reference Figure 1 The diagram shows two metal segments 1 connected end-to-end, with the rectangular dashed line representing the high-temperature heating zone. When electrical energy is supplied to the metal segment 1 of the heating element through adjacent conductive pins 2, the high-temperature zone is located in the middle region of the metal segment 1 itself. When the heating segments are connected in series through the spaced-apart conductive pins 2, the high-temperature zone is located in the middle region of the entire heating element. That is, the diagram shows three corresponding conductive pins A, B, and C. Electrical energy is supplied to the two heating segments through AB and BC respectively, and to the combination of heating segments through AC. The combination of heating segments between AC constitutes the complete heating element.

[0030] The heating element in this application adopts a dual mode of heating the heating segment individually and heating the heating segment as a whole. This improves the problem of insufficient baking of the tobacco matrix caused by the low temperature at both ends when heating the independent heating segment. It can ensure that the tobacco matrix covered by the heating element is fully heated and baked, thereby improving the utilization rate of the tobacco matrix.

[0031] Furthermore, the cross-sectional shape of the metal segment 1 is selected from one or more of line segments, broken lines, and curves. The shape of the heating element is selected from one or more of sheet-like, columnar, and barrel-like shapes. In the embodiments of this application, when at least two metal segments 1 are distributed on a plane, the heating element has a sheet-like structure; when at least two metal segments 1 are distributed on a curved surface, the heating element has a columnar or barrel-like structure. The shape of each metal segment 1 in the heating element can be the same or different, and the metal segment 1 can be a line segment, a broken line, and / or a curve.

[0032] A second aspect of this application provides a method for controlling the aforementioned heating element, comprising the following steps: supplying electrical energy to a single metal segment 1 via adjacent conductive pins 2, and supplying electrical energy to a combination of at least two metal segments 1 via non-adjacent conductive pins 2. It is understood that supplying electrical energy to adjacent conductive pins 2 can consume the aerosol matrix 3 of the metal segment 1 between the two conductive pins 2; supplying electrical energy to non-adjacent conductive pins 2 can also consume the aerosol matrix 3 between the two metal segments 1.

[0033] Specifically, power is supplied to each pair of adjacent conductive pins 2 until each first heating segment meets the first preset condition; power is supplied to two conductive pins 2 spaced apart by one conductive pin 2 until each second heating segment meets the second preset condition.

[0034] Understandably, in this embodiment of the application, electrical energy is first supplied to each individual metal segment 1 until they all meet the first preset condition, and then electrical energy is supplied to each pair of adjacent metal segments 1 until they meet the second preset condition.

[0035] In this embodiment, the first preset condition and the second preset condition are selected from one or more of the following: the duration of providing electrical energy exceeds a preset duration; the number of suction ports after providing electrical energy to the heating element is greater than a preset number; the aerosol particle size index is lower than the expected value during suction after providing electrical energy to the heating element; and the aerosol smoke humidity is lower than a preset value during suction after providing electrical energy to the heating element. The first preset condition and the second preset condition can be the same or different. It is understood that the time periods for providing electrical energy to the first metal segment 1, the second metal segment 1, and the Nth metal segment 1 can overlap or not overlap.

[0036] For Figure 1 Specifically, for the heating element, power is first supplied to segment AB, and after 120 seconds, power supply to segment AB is stopped. Then, power is supplied to segment BC, and after 120 seconds, power supply to segment BC is stopped. Then, power is supplied to segment AC, and after 60 seconds, power supply to segment AC is stopped.

[0037] In other embodiments, the steps include: providing electrical energy to the first metal segment 1 until it meets a first preset condition; providing electrical energy to the second metal segment 1 until it meets the first preset condition; providing electrical energy to the heating segment combination formed by the first metal segment 1 and the second metal segment 1 until it meets a second preset condition; providing electrical energy to the third metal segment 1 until it meets the first preset condition; providing electrical energy to the heating segment combination formed by the second metal segment 1 and the third metal segment 1 until it meets the second preset condition; providing electrical energy to the Nth metal segment 1 until it meets the first preset condition; and providing electrical energy to the heating segment combination formed by the (N-1)th metal segment 1 and the Nth metal segment 1 until it meets the second preset condition.

[0038] In this embodiment, unlike the above-described method of providing electrical energy, electrical energy is first provided to the first two metal segments 1 until they respectively meet the first preset condition; then, electrical energy is provided to the heating segment combination formed by them until it meets the second preset condition; then, electrical energy is provided to the third metal segment 1 until it meets the first preset condition, and then electrical energy is provided to the heating segment combination formed by the second and third metal segments 1 until it also meets the second preset condition. This process is repeated until electrical energy is provided to the last, i.e., the Nth metal segment 1, until it meets the first preset condition, and then electrical energy is provided to the heating segment combination formed by the (N-1)th metal segment 1 and the Nth metal segment 1 until it also meets the second preset condition, thus completing the entire heating process.

[0039] Similarly, the first and second preset conditions are selected from one or more of the following: the duration of providing electrical energy exceeds a preset duration; the number of suction ports after providing electrical energy to the heating element exceeds a preset number; the aerosol particle size index during suction after providing electrical energy to the heating element is lower than the expected value; and the aerosol smoke humidity during suction after providing electrical energy to the heating element is lower than a preset value. The first and second preset conditions can be the same or different. Understandably, the time periods for providing electrical energy to the first metal segment 1, the second metal segment 1, and the Nth metal segment 1 can overlap or not.

[0040] The two heating element control methods provided above can avoid the heating blind zone of the aerosol matrix 3, so that the aerosol matrix 3 is heated evenly and fully heated and baked, thereby improving the utilization rate of tobacco materials.

[0041] In some embodiments, while providing a second power to a subsequent pair of adjacent conductive pins 2, each preceding pair of adjacent conductive pins 2 maintains a first power, which is less than the second power.

[0042] In this embodiment, to reduce the condensation of generated aerosols within the aerosol matrix 3, electrical energy is supplied to each preceding metal segment 1 while simultaneously supplying power to the subsequent metal segment 1. The second power is supplied to the subsequent metal segment 1 for heat transfer between the subsequent metal segment 1 and the aerosol generating matrix to generate aerosols; the first power is supplied to the previously baked metal segment 1, primarily for heat preservation of its corresponding aerosol matrix 3 to prevent condensation of the generated aerosols. Therefore, the first power is less than the second power.

[0043] Similarly, in other embodiments, while providing a fourth power to the subsequent pair of spaced conductive pins 2, each preceding pair of spaced conductive pins 2 maintains a third power, which is less than the fourth power. That is, the fourth power is provided to the subsequent metal segment 1 assembly for heat transfer between the subsequent metal segment 1 assembly and the aerosol generating matrix to generate aerosols; the third power is provided to the previously baked metal segment 1 assembly, mainly for heat preservation of its corresponding aerosol matrix 3 to prevent condensation of the generated aerosols. Therefore, the third power is less than the fourth power.

[0044] The length and extension distance of the conductive path of each metal segment 1 in the heating element determine the density of the conductive path distribution of the heating segment. The sparser the distribution, the more energy needs to be provided to the corresponding tobacco matrix. The power of the electrical energy provided is determined according to the distribution density of the heating segment.

[0045] Specifically, the cross-section of metal segment 1 is a broken line or a curve. The formula for calculating the second power is: Second power = k * preset reference power / distribution density, where k is the power coefficient; the formula for calculating the distribution density is: Distribution density = heating segment path length / area of ​​the smallest circumscribed rectangle occupied by the heating segment; where the heating segment path length is the unfolded length of the conductive trajectory of the heating segment. In other words, the smaller the distribution density, the greater the second power; the greater the distribution density, the smaller the second power.

[0046] A third aspect of the embodiments of this application provides an aerosol generating device, including an aerosol matrix 3, a power supply device and the aforementioned heating element, wherein the aerosol matrix 3 is disposed on at least one side of the heating element; the power supply device includes a power supply 5 and a control module, wherein the control module is electrically connected to the power supply 5, and the control module is connected to the conductive pin 2 of the heating element through an electrical contact point disposed thereon to provide electrical energy to the metal segment 1 or combination of metal segments 1 corresponding to the conductive pin 2.

[0047] In the embodiments of this application, reference is made to Figure 2The aerosol matrix 3 may include two square sheet-like folded tobacco strips. The aerosol matrix 3, along with an etched metal heating element and a power supply, constitute an aerosol generating device. The sheet-like tobacco strips are formed by folding sheet-like tobacco laterally or longitudinally, with 1 to 12 folds, flush edges, and a final thickness of 2 to 5 mm and a density of 0.3 to 0.5 g / cm³. 3 The square structure. After static balancing, the moisture content of the above-mentioned sheet tobacco folded strip is controlled at 8% to 10%, and the folding pressure of each layer is 0.1 to 0.2 MPa, which further ensures the fitting accuracy with the etched metal heating element and avoids the decrease in heating efficiency due to excessive gaps.

[0048] In this embodiment, the heating element is made of stainless steel or iron-chromium-aluminum alloy with a thickness of 0.03–0.2 mm. At least two independent metal segments 1 are formed on the surface using photolithography etching. These segments are distributed along the extension direction of the heating element and connected end-to-end. Each individual metal segment 1 has a resistance of 0.5–2 Ω, and the total resistance after series connection is 2–4 Ω. A gap of 0.2–0.5 mm is provided between each trace of the metal segment 1 to prevent short circuits. The heating element is passivated using a chromate passivation process, forming an insulating protective layer of aluminum oxide or zirconium oxide film with a thickness controlled between 0.01 and 0.03 mm, used to improve the high-temperature resistance and insulation performance of the heating element.

[0049] In some embodiments, reference is made to Figure 2 Two square, sheet-shaped tobacco strips symmetrically sandwich a metal sheet heating element, forming a "tobacco-heating element-tobacco" sandwich structure. This ensures complete adhesion between the heating element and the aerosol matrix 3, with a gap not exceeding 0.1mm. This tight-fitting sandwich structure effectively avoids problems such as insufficient localized heating or excessive scorching. Furthermore, the sandwich structure not only utilizes the aerosol matrix 3 to insulate the heat generated by the heating element but also provides structural support, reducing the thickness requirements of the heating element. The heating element does not require much electrical energy for its own heating, significantly reducing power consumption.

[0050] In some embodiments, reference is made to Figure 3The power supply device includes a housing, a cavity, a power supply 5, electrical contacts, and a control module. The power supply 5 is connected to the control module to supply power. The electrical contacts are designed as elastic electrodes, which include at least one of the following: a compressible and resettable spring, a spring pin, a metal spring, or a hybrid assembly of an elastic insulator and a conductor. When the elastic electrode uses a spring pin, it is made of copper alloy and plated with gold, silver, platinum, or nickel, with a compression stroke of 0.5–2 mm. The housing has an internal cavity adapted to the aerosol product. The spring pins are located at the bottom of the cavity, with the number matching the number of conductive pins 2 of the heating element. They are made of copper alloy and plated with gold, silver, or nickel, with a compression stroke of 0.5–2 mm, allowing for tight elastic contact with the exposed conductive pins 2 of the heating element to ensure conductive stability. The control module is integrated inside the housing and consists of a microcontroller, a drive circuit, and a power supply 5 module. The microcontroller pre-stores the heating control program for the heating element.

[0051] In some embodiments, the aerosol generating device includes a support unit 6 and a base 4, with the heating element fixed on the base 4 and the conductive pin 2 exposed on the base 4. The support unit 6 is wrapped around the aerosol matrix 3, the heating element and the base 4.

[0052] In this embodiment, the base 4 is a plant powder casting. The plant powder casting base 4 is made by mixing tobacco powder, starch and biodegradable adhesive in a mass ratio of 6:3:1, and is formed by molding at 80-100℃ and 0.3-0.5MPa. It wraps around the end of the etched metal heating element to form a cylindrical base 4. The base 4 is 5-10mm long, 10-35mm wide and 2-8mm thick. After molding, it is dried until the moisture content is less than 5%, and has a high temperature resistance of ≥200℃, which can realize reliable fixation and insulation protection of the heating element.

[0053] In this embodiment, the support unit 6 is made of food-grade parchment paper or recycled tobacco paper, and is rolled and wrapped with a tension of 5-8N to wrap the sandwich structure aerosol matrix 3, heating element and plant powder casting base 4, finally forming a cubic product with a length of 15-40mm, a width of 10-35mm and a thickness of 2-8mm. An opening is reserved at one end of the support unit 6 near the plant powder casting base 4 to expose the conductive pin 2 of the heating element. The exposed length of the conductive pin 2 is controlled to be 0.1-0.5mm.

[0054] The conductive pins 2 of the heating element are fixed by a plant powder casting base 4. The material is naturally compatible with the tobacco matrix and can be biodegradable. The molded base 4 has high structural strength and can withstand the impact of external forces during rolling and insertion. Combined with the integrated rolling and wrapping through the support unit 6, compared with traditional metal brackets or injection molded bases 4 and shells, it completely avoids foreign object feeling and material pollution, and greatly improves the safety of use.

[0055] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heating element, characterized in that: It includes multiple metal segments, which are connected end to end in sequence, with conductive pins connected to the connection points; the first and last metal segments are each connected to conductive pins; a conductive path can be formed between any two conductive pins.

2. The heating element according to claim 1, characterized in that, The cross-sectional shape of the metal segment is selected from one or more of line segments, broken lines, and curves; the shape of the heating element is selected from one or more of sheet-like, columnar, and barrel-like shapes.

3. The method for controlling the heating element according to claim 1 or 2, characterized in that, Includes the following steps: Power is supplied to a single metal segment via adjacent conductive pins, and power is supplied to a combination of at least two metal segments via non-adjacent conductive pins.

4. The control method for the heating element according to claim 3, characterized in that, Specifically: Power is supplied to each pair of adjacent conductive pins until each first heating segment meets a first preset condition; power is supplied to two conductive pins spaced apart by one conductive pin until each second heating segment meets a second preset condition. or, Power is supplied to the first metal segment until it meets a first preset condition; power is supplied to the second metal segment until it meets the first preset condition; power is supplied to the heating segment combination formed by the first and second metal segments until it meets a second preset condition; power is supplied to the third metal segment until it meets the first preset condition; power is supplied to the heating segment combination formed by the second and third metal segments until it meets the second preset condition; power is supplied to the Nth metal segment until it meets the first preset condition; power is supplied to the heating segment combination formed by the (N-1)th metal segment and the Nth metal segment until it meets the second preset condition.

5. The control method for the heating element according to claim 4, characterized in that, The first preset condition and the second preset condition are selected from one or more of the following: the duration of providing power exceeds a preset duration, the number of suction ports after providing power to the heating element is greater than a preset number of ports, the aerosol particle size index is lower than the expected value when suctioning after providing power to the heating element, and the aerosol smoke humidity is lower than a preset value when suctioning after providing power to the heating element.

6. The control method for the heating element according to claim 4, characterized in that, While providing a second power to the next pair of adjacent conductive pins, each pair of adjacent conductive pins in front of it maintains a first power, which is less than the second power.

7. The control method for the heating element according to claim 6, characterized in that, The cross-section of the metal segment is a broken line or a curve, and the formula for calculating the second power is: Second power = k * preset baseline power / distribution density Where k is the power coefficient; the formula for calculating the distribution density is: Distribution density = Path length of heating segment / Area of ​​the smallest bounding rectangle occupied by the heating segment The path length of the heating segment is the unfolded length of the conductive trajectory of the heating segment.

8. The control method for the heating element according to claim 4, characterized in that, While providing a fourth power to the next pair of spaced conductive pins, each pair of spaced conductive pins in front of them maintains a third power, which is less than the fourth power.

9. An aerosol generating device, characterized in that, The device includes an aerosol matrix, a power supply device, and a heating element as described in claim 1 or 2, wherein the aerosol matrix is ​​disposed on at least one side of the heating element; the power supply device includes a power supply and a control module, wherein the control module is electrically connected to the power supply, and the control module is connected to the conductive pins of the heating element through electrical contact points disposed thereon to provide electrical energy to the metal segment or combination of metal segments corresponding to the conductive pins.

10. The aerosol generating apparatus according to claim 9, characterized in that, The aerosol generating device includes a support unit and a base. The heating element is fixed on the base, and the conductive pins are exposed on the base. The support unit is wrapped around the aerosol matrix, the heating element, and the base.

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