JP7828461B2 - Heat generating assembly and aerosol generating device - Google Patents

Description

This application relates to the technical field of atomization, and in particular to heat generating assemblies and aerosol generating devices.

The aerosol generating device is used to heat and atomize an aerosol generating matrix, for example, by burning a solid matrix of plant leaves with a specific fragrance in a non-combustion manner, causing the leaf-based solid matrix to burn and form an aerosol.

Currently, most heating assemblies in aerosol generating devices use a central heating method to heat the aerosol generating matrix.

However, conventional heating assemblies heat the aerosol-generating matrix unevenly, resulting in a poor user experience.

In view of the above problems, the present application provides a heating assembly and an aerosol generating device, which solves the problems of the prior art, in which the heating assembly heats unevenly, resulting in a poor user experience.

To solve the above technical problem, the present application provides a heat-generating assembly, the heat-generating assembly including a substrate and a conductive trace, the substrate having a heat-generating region, the conductive trace being disposed in the heat-generating region, the substrate and the conductive trace being at least partially inserted into an aerosol-generating matrix so that the conductive trace generates heat under an energized condition to heat the aerosol-generating matrix, and the conductive trace is configured such that under an energized condition the conductive trace forms at least two high-temperature regions in the heat-generating region.

In one embodiment, the conductive traces are configured such that, under energized conditions, the conductive traces form at least one high temperature region on each end of the heat generating region along the length of the substrate.

In one embodiment, the conductive trace includes two sub-conductive traces, and the two sub-conductive traces are arranged in series or in parallel.

In one embodiment, the two sub-conductive traces are located on either side of the centerline of the substrate, and are located symmetrically or asymmetrically with respect to the centerline of the substrate.

In one embodiment, one of the sub-conductive traces is configured to form one high temperature region at one end of the heat generation region along the longitudinal direction of the substrate, and the other of the sub-conductive traces is configured to form one high temperature region at the other end of the heat generation region along the longitudinal direction of the substrate.

In one embodiment, the conductive trace is bent multiple times at locations corresponding to high temperature areas.

In one embodiment, the substrate further includes a non-heat-generating region where the conductive traces are not located, the heat-generating region and the non-heat-generating region are located adjacent to each other along the longitudinal direction of the substrate, and a tip is formed at one end of the heat-generating region away from the non-heat-generating region.

In one embodiment, the heat-generating assembly further includes a first electrode and a second electrode spaced apart in the non-heat-generating region, and is adapted to be electrically connected to a power supply assembly, one of the first electrode and the second electrode being electrically connected to a first end of the conductive trace, and the other of the first electrode and the second electrode being electrically connected to a second end of the conductive trace.

In one embodiment, the heat generating assembly further includes a protective layer coated on the substrate and covering the conductive traces, the first electrode, and the second electrode.

In some embodiments, the substrate is an insulating substrate.

In some embodiments, the substrate includes a conductive substrate and an insulating layer disposed on a surface of the conductive substrate, with the conductive traces disposed on the side of the insulating layer away from the conductive substrate.

To solve the above technical problems, the present application further provides an aerosol generating device, the aerosol generating device including a housing, and a heat generating assembly and a power supply assembly installed in the housing, wherein the power supply assembly is electrically connected to the heat generating assembly and is used to supply power to the heat generating assembly, and the heat generating assembly is any one of the heat generating assemblies described above.

Unlike the prior art, the heating assembly and aerosol-generating device provided by the present application include a substrate and a conductive trace, the substrate having a heating region, the conductive trace being disposed in the heating region, and the substrate and the conductive trace being at least partially inserted into the aerosol-generating matrix so that the conductive trace generates heat and heats the aerosol-generating matrix under an energized condition. Here, the conductive trace is positioned such that, under an energized condition, the conductive trace forms at least two high-temperature regions in the heating region, thereby making the heating of the heating assembly more uniform and improving the user experience.

1 is a structural schematic diagram of an aerosol generating device according to an embodiment of the present application. 1 is a cross-sectional view of an aerosol generating device according to an embodiment of the present application taken along a specific angle. 1 is a structural schematic diagram of an aerosol-generating product according to an embodiment of the present application; 1 is a structural schematic diagram of a heat generating assembly according to an embodiment of the present application; FIG. 1 is an exploded view of a heat generating assembly according to an embodiment of the present application. 1 is a structural schematic diagram of a bent portion of a conductive trace that forms a high temperature area in a heat generating region according to an embodiment of the present application; FIG. 2 is a structural schematic diagram of a conductive trace according to an embodiment of the present application. FIG. 2 is a structural schematic diagram of a conductive trace according to another embodiment of the present application. FIG. 2 is a structural schematic diagram of a heat generating assembly according to another embodiment of the present application. FIG. 10 is a structural schematic diagram of a heat generating assembly according to yet another embodiment of the present application. FIG. 10 is a structural schematic diagram of a heat generating assembly according to yet another embodiment of the present application.

The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the drawings of the embodiments of this application. It should be understood that the described embodiments are only a part of the embodiments of this application, and are not all of them. All other embodiments that a person skilled in the art can obtain based on the embodiments of this application without any inventive effort fall within the scope of protection of this application.

The terms "first," "second," and "third" in this application are used for descriptive purposes only and should not be construed as indicating or implying relative importance or the number of technical features indicated. Accordingly, features defined as "first," "second," and "third" can explicitly or implicitly include at least one of these features. In the description of this application, "plurality" means at least two, e.g., two, three, etc., unless otherwise clearly and specifically defined. All directional indications (up, down, left, right, front, rear, etc.) in the embodiments of this application are used solely to describe the relative positional relationships between components in a specific position (as shown in the drawings), sports situations, etc.; as the specific position changes, the directional indications change accordingly. Furthermore, the terms "include" and "have" and their variations are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units, or may include other steps or units inherent to such process, method, product, or device.

Any reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with that embodiment may be included in at least one embodiment of the present application. Appearances of this phrase in various places throughout the specification do not necessarily all refer to the same embodiment, nor are they separate or alternative embodiments mutually exclusive of other embodiments. Those skilled in the art will understand, either explicitly or implicitly, that the embodiments described herein can be combined with other embodiments.

1 to 11, FIG. 1 is a structural schematic diagram of an aerosol generating device according to one embodiment of the present application, FIG. 2 is a cross-sectional view of an aerosol generating device according to one embodiment of the present application taken along a particular angle, FIG. 3 is a structural schematic diagram of an aerosol generating product according to one embodiment of the present application, FIG. 4 is a structural schematic diagram of a heat generating assembly according to one embodiment of the present application, FIG. 5 is an exploded view of a heat generating assembly according to one embodiment of the present application, FIG. 6 is a structural schematic diagram of a bent portion of a conductive trace that forms a high-temperature region in a heat generating region according to one embodiment of the present application, FIG. 7 is a structural schematic diagram of a conductive trace according to one embodiment of the present application, FIG. 8 is a structural schematic diagram of a conductive trace according to another embodiment of the present application, FIG. 9 is a structural schematic diagram of a heat generating assembly according to another embodiment of the present application, FIG. 10 is a structural schematic diagram of a heat generating assembly according to yet another embodiment of the present application, and FIG. 11 is a structural schematic diagram of a heat generating assembly according to yet another embodiment of the present application.

1 and 2, the aerosol generating device 300 can be used to heat and atomize an aerosol-generating matrix. The aerosol generating device 300 can be used in various fields, such as medical atomization, cosmetic atomization, and recreational smoking. Specifically, the aerosol generating device 300 includes a housing 301, a heating assembly 100, and a power supply assembly 200 installed within the housing 301. The heating assembly 100 is used to heat and atomize the aerosol-generating matrix to form an aerosol. The power supply assembly 200 includes a battery 201, an airflow sensor (not shown), and a controller (not shown). The power supply assembly 200 is used to supply power to the heating assembly 100 and controls the operation of the heating assembly 100 to heat and atomize the aerosol-generating matrix to form an aerosol. Here, the airflow sensor is used to detect changes in airflow in the aerosol generating device 300, and the controller activates the battery 201 to power the heating assembly 100 based on the changes in airflow detected by the airflow sensor. In another optional embodiment, there may be no airflow sensor, and the controller activates the battery 201 to power the heat generating assembly 100 based on a control signal input by the user.

In one embodiment, the heat generating assembly 100 is at least partially inserted into the aerosol product 100. Specifically, the aerosol-generating product 10 includes a housing tube 11 and an aerosol-generating matrix disposed within the housing tube 11. Here, the aerosol-generating matrix may be a solid aerosol-generating matrix of plant leaves having a particular scent. The housing tube 11 may have a cylindrical structure having multiple sections, with the aerosol-generating matrix disposed within a first end of the housing tube 11 to form a matrix portion 12, and a filter material (not shown) disposed within a second end opposite the first end to form a filter portion 13, with a hollow portion 14 formed between the matrix portion 12 and the filter portion 13.

In one embodiment, the heat generating assembly 100 is at least partially inserted into the matrix portion 12, which contains a solid aerosol-generating matrix. The solid aerosol-generating matrix may be an ordered solid aerosol-generating matrix, a disordered solid aerosol-generating matrix, or a particulate solid aerosol-generating matrix. The hollow portion 14 may further contain a support material (not shown) and is used to collect the aerosol. The filter portion 13 contains a filter material and is used to filter impurities from the aerosol. Examples of the support material and filter material in the hollow portion 14 and the filter portion 13 include, but are not limited to, acetate fiber, polylactic acid fiber, polypropylene fiber, paper filter media, etc. In one specific embodiment, the first end of the containment tube 11 is an open structure or has at least a through-hole (not shown) through which external air and the heat generating assembly 100 can enter the aerosol-generating product 100.

In another embodiment, referring to FIG. 3, to prevent the temperature of the generated aerosol from becoming too high and affecting the user's experience, a cooling section 15 having a cooling material is further installed between the hollow section 14 and the filter section 13, and the cooling material may include, but is not limited to, polylactic acid and other phase change materials.

4 to 6, in one embodiment, the heating assembly 100 includes a substrate 20 and a conductive trace 30. The substrate 20 has a heating region 21, and the conductive trace 30 is disposed in the heating region 21. The substrate 20 and the conductive trace 30 are at least partially inserted into the aerosol-generating matrix so that the conductive trace 30 generates heat under an electric current and heats the aerosol-generating matrix. The substrate 20 may be shaped like a rod or a sheet, and may be made of an insulating ceramic or an insulating metal. The conductive trace 30 may be made of one or more of aluminum and its alloys, copper and its alloys, silver and its alloys, gold and its alloys, platinum and its alloys, iron and its alloys, nickel and its alloys, and titanium and its alloys. The heating circuit is formed on the surface of the substrate 20 by physical vapor deposition (e.g., magnetron sputtering, vacuum evaporation, ion plating) or chemical vapor deposition (ion-assisted chemical vapor deposition, laser-assisted chemical vapor deposition, metal-organic deposition). The conductive traces 30 can also be formed by printing and sintering a conductive paste.

The inventors of the present application have discovered that conventional heating assemblies 100 generally have only one high-temperature area 31 when energized, and that this high-temperature area 31 is generally located near the tip of the heating assembly 100, which causes the heating assembly 100 to heat the aerosol-generating matrix unevenly, resulting in a low heating effect and a low aerosol content. To solve this problem, the conductive trace 30 provided by the present application is configured so that, when energized, the conductive trace 30 forms at least two high-temperature areas 31 in the heating area 21, thereby ensuring that the high-temperature areas 31 of the heating assembly 100 are widely distributed, resulting in a better heating effect and improved mouthfeel and usage experience for the user.

As can be appreciated, the more resistive the material of the conductive trace 30, the more heat and temperature will be generated when current is applied. In one embodiment, the conductive trace 30 includes at least two heating sections with different resistances, with the higher resistance heating section located in a position corresponding to the high temperature region 31. In another embodiment, the material of the conductive trace 30 includes at least two materials with different resistances, with the more resistive material located in a position corresponding to the high temperature region 31. Under current-applied conditions, the temperature generated in the high temperature region 31 will be higher than the temperature in other regions of the heat generation region 21.

For example, the conductive traces 30 form at least two high-temperature regions 31 and multiple low-temperature regions (not shown) in the heat-generating region 21. The material of the conductive traces 30 includes silver and iron, where the resistance of iron is greater than the resistance of silver. The iron is disposed in positions corresponding to the high-temperature regions 31, and the silver is disposed in other positions in the heat-generating region 21.

For example, the conductive traces 30 form at least two high temperature regions 31, multiple medium temperature regions (not shown), and multiple low temperature regions in the heat generation region 21. The materials of the conductive traces 30 include silver, gold, and iron, where silver has the lowest resistance and iron has the highest resistance. Iron is placed in positions corresponding to the high temperature regions 31, gold is placed in positions corresponding to the medium temperature regions, and silver is placed in positions corresponding to the low temperature regions.

The above-mentioned medium-temperature region and low-temperature region are merely illustrative. Specifically, the temperature at which the aerosol-generating matrix is heated using a heating-non-combustion method is typically 240°C to 350°C, the temperature of the high-temperature region 31 is 330°C to 350°C, and the temperature of the low-temperature region is 240°C or higher. In other words, the temperatures of the medium-temperature region and low-temperature region are 240°C to 330°C, with the temperature of the medium-temperature region being higher than that of the low-temperature region. Specific settings can be made according to actual needs.

In another embodiment, referring to Figures 5 to 8, the conductive trace 30 includes only one material, and is bent multiple times at a position corresponding to the high-temperature region 31 to form a bent portion 32. Here, the shape of the conductive trace 30 in the region of the bent portion 32 may be at least one of an acute angle, a right angle, an obtuse angle, and an arc, or a combination thereof, and is not limited thereto. Specifically, bending the metal changes the resistance of the bent portion, which generally manifests as an increase in resistance. As a result, under electrical current conditions, a large amount of heat is generated at the bent portion 32, and the temperature is high, thereby forming a high-temperature region 31 in the heat-generating region 21.

Furthermore, since the distribution density of the conductive traces 30 in the bent portion 32 is greater than the distribution density of the conductive traces 30 in the unbent region, under energized conditions, the bent portion 32 of the same unit area generates more heat and has a higher temperature than the unbent region, thereby forming a high-temperature region 31 in the heat-generating region 21.

6, 9, and 10, if the heating temperature of each region on the heating assembly 100 is uneven, for example, if one end of the heating assembly 100 is heated higher and the other end is heated lower under energized conditions, the temperature of the high-temperature region 31 will become higher and the temperature of the low-temperature region will become lower during the user's inhalation process, which could result in the risk of excessive heating, fatigue cracking of the conductive trace 30 in the high-temperature region 31, and increased fatigue resistance, thereby shortening the service life. To avoid this, in one embodiment, the conductive trace 30 is configured so that, under energized conditions, the conductive trace 30 forms at least one high-temperature region 31 on each end of the heating region 21 along the longitudinal direction of the substrate 20, so that both the upper and lower ends of the heating region 21 can sufficiently heat the aerosol-generating matrix. This allows the heating assembly 100 to uniformly, quickly, and more thoroughly heat and atomize the aerosol-generating matrix, while avoiding the risks of excessive heating, fatigue cracking of the conductive trace 30, and increased fatigue resistance.

In some embodiments, referring to Figures 6, 9, and 10, the conductive trace 30 includes two sub-conductive traces 33, which are arranged in series or parallel. Both sub-conductive traces 33 form at least one high temperature region 31 in the heat generation region 21.

In a specific embodiment, referring to FIG. 6, each of the two sub-conductive traces 33 includes one connection end (not shown) and one free end 331, the connection ends of the two sub-conductive traces 33 are connected to each other, and the free ends 331 of the two sub-conductive traces 33 are used to electrically connect to the positive and negative poles of the power supply assembly 200.

In another specific embodiment, referring to FIG. 9 , two sub-conductive traces 33 are connected end-to-end to form a circular conductive trace. Two extensions 332 are provided on the circular conductive trace, and the two extensions 332 are used to electrically connect to the positive and negative poles of the power supply assembly 200. Specifically, one extension 332 is provided at the bottom end of the circular conductive trace along the longitudinal direction of the substrate 20, and the other extension 332 is disposed at the top of the circular conductive trace along the longitudinal direction of the substrate 20 and extends from the other surface of the substrate 20 on which the sub-conductive traces 33 are not provided to the bottom end of the substrate 20. For example, it extends from the back side of the surface on which the sub-conductive traces 33 are provided to the bottom end of the substrate 20.

As can be seen, referring to FIG. 10, in another parallel embodiment, two extensions 332 are both located at the center of the sub-conductive trace 33 along the longitudinal direction of the substrate 20 and are spaced apart. For example, the two extensions 332 extend from the other surface of the substrate 20, where the sub-conductive trace 33 is not provided, to the bottom end of the substrate 20, and are used to electrically connect to the positive and negative poles of the power supply assembly 200. In some embodiments, referring to FIGS. 6 and 11, the two sub-conductive traces 33 are respectively located on either side of the center line M of the substrate 20 and are located symmetrically or asymmetrically with respect to the center line M of the substrate 20. Here, the center line M of the substrate 20 represents the center line along the longitudinal direction of the substrate 20. Adjusting the positions of the two sub-conductive traces 33 on the substrate 20 can improve the heating effect, thereby achieving a better suction experience.

Referring to FIG. 6 , the two sub-conductive traces 33 are disposed on either side of the center line M of the substrate 20, and are disposed asymmetrically with respect to the center line M of the substrate 20. Each of the two sub-conductive traces 33 includes a bent portion 32 that can form a high-temperature region 31 under an energized condition. One of the bent portions 32 is disposed along the longitudinal direction of the substrate 20 at a top end position of the substrate 20 offset from the center line M of the substrate 20, and the other bent portion 32 is disposed along the longitudinal direction of the substrate 20 at a bottom end position of the substrate 20 offset from the center line M of the substrate 20. Specifically, one of the sub-conductive traces 33 forms a high-temperature region 31 at one end of the heat-generating region 21 along the longitudinal direction of the substrate 20, and the other sub-conductive trace 33 forms a high-temperature region 31 at the other end of the heat-generating region 21 along the longitudinal direction of the substrate 20, thereby enabling the heating assembly 100 to heat the aerosol-generating matrix more uniformly and achieve a better inhalation experience.

Referring to FIG. 11 , two sub-conductive traces 33 are respectively arranged on either side of the center line M of the substrate 20 and are arranged symmetrically with respect to the center line M of the substrate 20. Each of the two sub-conductive traces 33 includes a bent portion 32 that can form a high-temperature region 31 under an energized condition, and the two bent portions 32 are arranged symmetrically with respect to the center line M of the substrate 20. Specifically, one of the sub-conductive traces 33 forms a high-temperature region 31 on one side of the heat-generating region 21, and the other sub-conductive trace 33 forms a high-temperature region 31 on the other side of the heat-generating region 21, thereby enabling the heat-generating assembly 100 to more fully heat the aerosol-generating matrix and achieving a better inhalation experience.

In one embodiment, the substrate 20 further includes a non-heat-generating area 22 (see FIG. 5) where the conductive traces 30 are not provided, and the heat-generating area 21 and the non-heat-generating area 22 are adjacent to each other along the longitudinal direction of the substrate 20. Specifically, at least a portion of the non-heat-generating area 22 is used for fixed connection to the housing 301, and a connection medium between the conductive traces 30 and the power supply assembly 200 is provided in the non-heat-generating area 22. Here, the connection medium may be a metal wire or a conductive coating for connecting the conductive traces 30 and the power supply assembly 200. It will be understood that the presence of the metal wire or conductive coating does not mean that the non-heat-generating area 22 does not generate heat at all under energized conditions; a small amount of heat is still generated, but this can be ignored.

In some embodiments, the heat generating assembly 100 further includes a mounting seat (not shown) that is fixedly connected to the heat generating assembly 100, thereby mounting the heat generating assembly 100 within the housing 301 via the mounting seat. Specifically, the material of the mounting seat can be an organic or inorganic material with a melting point of 160°C or higher. Specifically, the mounting seat is fixed to the heat generating assembly 100 by a locking structure or adhesive, which may be an adhesive that can withstand high temperatures.

In one embodiment, referring to FIG. 4, a tip 211 is formed at the end of the heating region 21 away from the non-heating region 22, thereby reducing resistance when the heating assembly 100 is inserted into the aerosol-generating product 10.

5, in one embodiment, the heating assembly 100 further includes a first electrode 34 and a second electrode 35 spaced apart in the non-heating region 22, the first electrode 34 and the second electrode 35 being used to electrically connect the conductive trace 30 to the power supply assembly 200. One of the first electrode 34 and the second electrode 35 is electrically connected to a first end of the conductive trace 30, and the other of the first electrode 34 and the second electrode 35 is electrically connected to a second end of the conductive trace 30. Specifically, when the conductive trace 30 is an open conductive trace 30 or two serially connected sub-conductive traces 33, one of the first electrode 34 and the second electrode 35 is electrically connected to one free end 331 of the conductive trace 30, and the other of the first electrode 34 and the second electrode 35 is electrically connected to the other free end 331 of the conductive trace 30. When the conductive trace 30 consists of two sub-conductive traces 33 connected in parallel, one of the first electrode 34 and the second electrode 35 is electrically connected to one extension 332 of the annular conductive trace, and the other of the first electrode 34 and the second electrode 35 is electrically connected to the other extension 332 of the annular conductive trace. In this embodiment, both the first electrode 34 and the second electrode 35 are conductive lead wires.

In one embodiment, referring to FIG. 5, the heating assembly 100 further includes a protective layer 36 coated on the substrate 20 and covering the conductive traces 30, the first electrode 34, and the second electrode 35 to prevent aerosols formed upon heating the aerosol-generating matrix from damaging the first electrode 34, the second electrode 35, and the conductive traces 30. Here, the protective layer 36 may be a glass glaze layer.

In a specific embodiment, the protective layer 36 is applied only to the surface of the substrate 20 on which the conductive traces 30, the first electrode 34, and the second electrode 35 are disposed, thereby preventing the conductive traces 30, the first electrode 34, and the second electrode 35 from being damaged or falling off.

In another embodiment, the protective layer 36 can also cover the entire substrate 20, thereby protecting the entire heat generating assembly 100 and providing the heat generating assembly 100 with a smooth surface, further reducing resistance when the heat generating assembly 100 is inserted into the aerosol generating product 100.

In one embodiment, the substrate 20 is an insulating substrate, for example, the substrate 20 is a sheet-shaped insulating ceramic, and the conductive trace 30 is disposed on one surface of the insulating substrate. Here, the substrate 20 made of insulating ceramic may have a thermal conductivity of 4 to 18 W/(m·k), a bending strength of 600 MPa or more, thermal stability exceeding 450°C, and a fire resistance higher than 1450°C. Here, the substrate 20 may also be a ZTA material (zirconia-toughened alumina ceramic) or MTA (a composite of mullite and alumina).

In another embodiment, the substrate 20 can further include an uninsulated conductive substrate 23. For example, the substrate 20 can include a sheet-like metal substrate and an insulating layer 24 disposed on the surface of the metal substrate. The conductive traces 30 are disposed on the side of the insulating layer 24 away from the conductive substrate 23. This increases the strength of the heating assembly 100, preventing bending or breakage of the heating assembly 100, and also allows heat generated when current is applied to the conductive traces 30 to be diffused to the aerosol-generating matrix in contact with the substrate 20, further improving the heat-receiving uniformity of the aerosol-generating matrix. The material of the substrate 20 can also be a novel composite zirconia material, which can retain and transfer the heat generated by the conductive traces 30, thereby improving the energy utilization efficiency of the heating assembly 100.

The above are embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present application, or anything directly or indirectly applicable to other related technical fields, is similarly included within the patent protection scope of the present application.

Claims (12)

A heat generating assembly including a substrate and conductive traces,
the substrate has a heat generating region;
the conductive trace is disposed in the heat generating region, and the substrate and the conductive trace are adapted to be at least partially inserted into the aerosol-generating matrix so that the conductive trace generates heat under an energized condition to heat the aerosol-generating matrix;
wherein the conductive traces are configured such that under an energized condition, the conductive traces form at least two high temperature regions in the heat generating region ;
the conductive traces are electrically connected only to a first electrode and a second electrode, the first electrode and the second electrode being electrically connected to a power supply assembly;
The at least two high temperature regions are located on either side of a centerline of the substrate, and are asymmetrically located with respect to the centerline of the substrate, and a low temperature region is located between the at least two high temperature regions in the conductive trace;
A heat generating assembly, wherein the temperature of the high temperature region is 330°C to 350°C, and the temperature of the low temperature region is 240°C or higher . The heat-generating assembly of claim 1, wherein the conductive traces are configured such that, under energized conditions, the conductive traces form at least one high-temperature region on each end of the heat-generating region along the longitudinal direction of the substrate. The heat generating assembly of claim 1, wherein the conductive trace includes two sub-conductive traces, the two sub-conductive traces being arranged in series or in parallel. The heat generating assembly of claim 3 , wherein the two sub-conductive traces are located on either side of the centerline of the substrate and are asymmetrically located with respect to the centerline of the substrate. The heat generating assembly of claim 4, wherein one of the two sub-conductive traces is configured to form one high temperature area at one end of the heat generating area along the longitudinal direction of the substrate, and the other of the two sub-conductive traces is configured to form one high temperature area at the other end of the heat generating area along the longitudinal direction of the substrate. The heat generating assembly of claim 1, characterized in that the conductive trace corresponding to the location of the high temperature area is bent multiple times. The heat-generating assembly of claim 1, wherein the substrate further includes a non-heat-generating area where the conductive traces are not located, the heat-generating area and the non-heat-generating area are located adjacent to each other along the longitudinal direction of the substrate, and a tip is formed at one end of the heat-generating area away from the non-heat-generating area. 8. The heat generating assembly of claim 7, wherein the first electrode and the second electrode are spaced apart in the non-heat generating region, one of the first electrode and the second electrode is electrically connected to a first end of the conductive trace, and the other of the first electrode and the second electrode is electrically connected to a second end of the conductive trace. The heat generating assembly of claim 8, further comprising a protective layer coated on the substrate and covering the conductive traces, the first electrode, and the second electrode. The heat generating assembly of claim 1, wherein the substrate is an insulating substrate. The heat-generating assembly of claim 1, wherein the substrate includes a conductive substrate and an insulating layer disposed on the surface of the conductive substrate, and the conductive traces are disposed on the side of the insulating layer away from the conductive substrate. An aerosol generating device comprising a housing, a heating assembly and a power supply assembly installed within the housing, wherein the power supply assembly is electrically connected to the heating assembly and is used to supply power to the heating assembly, and the heating assembly is the heating assembly described in any one of claims 1 to 11.