WO2025051123A1 - Heater, aerosol generating apparatus, aerosol generating system and control method - Google Patents

Abstract

A heater (1), an aerosol generating apparatus, an aerosol generating system and a control method. The heater (1) comprises: a first heating element (12) used for heating an aerosol generating product (2), part of the first heating element (12) forming a first heating portion (121), and part forming a second heating portion (122), wherein the first heating portion (121) and the second heating portion (122) are configured to generate heat at the same time, and the heating temperature of the first heating portion (121) is greater than the heating temperature of the second heating portion (122); a second heating element (13) used for heating the aerosol generating product (2), part of the second heating element (13) forming a third heating portion (131) and part forming a fourth heating portion (132), wherein the third heating portion (131) and the fourth heating portion (132) are configured to generate heat at the same time, and the heating temperature of the fourth heating portion (132) is greater than the heating temperature of the third heating portion (131). In the circumferential direction of the heater (1), at least a part of the first heating element (12) overlaps with the second heating element (13).

Description

Heater, aerosol generating device, aerosol generating system and control method

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to a Chinese patent application filed with the China Patent Office on September 4, 2023, with application number 202311138555.8, and invention name “Heater, aerosol generating device, aerosol generating system and control method”, the entire contents of which are incorporated by reference into this application.

Technical Field

The present application relates to the technical field of heat-not-burn aerosol generation, and in particular to a heater, an aerosol generating device, an aerosol generating system and a control method.

Background Art

Smoking articles (eg, cigarettes, cigars, etc.) burn tobacco during use to produce tobacco smoke. People have attempted to replace these tobacco-burning articles by creating products that release compounds without combustion.

An example of such a product is a heating device that releases a compound by heating rather than burning a material. For example, the material may be an aerosol-generating article containing tobacco or other non-tobacco products that may or may not contain nicotine. Known heating devices do not provide the flexibility to heat an aerosol-generating article.

Summary of the invention

The present application provides a heater, an aerosol generating device, an aerosol generating system and a control method, which can flexibly bake aerosol generating products.

An embodiment of the present application provides a heater, comprising:

a first heating element for heating the aerosol generating article, wherein a portion of the first heating element constitutes a first heating portion and a portion of the first heating element constitutes a second heating portion, and a heating temperature of the first heating portion is greater than a heating temperature of the second heating portion; and

a second heating element for heating the aerosol generating article, wherein a portion of the second heating element constitutes a third heating portion and a portion of the second heating element constitutes a fourth heating portion, and a heating temperature of the fourth heating portion is greater than a heating temperature of the third heating portion;

Wherein, along the circumferential direction of the heater, at least a portion of the first heating element overlaps with the second heating element.

One embodiment of the present application provides an aerosol generating device, comprising the heater, and also comprising a power supply and a control circuit; the control circuit controls the power supply to provide power to the first heating element and the second heating element, and after receiving a heating start instruction, controls the first heating element and the second heating element to heat up at the same time, or controls one of the first heating element and the second heating element to heat up before the other.

One embodiment of the present application provides an aerosol generating system, comprising the aerosol generating device and aerosol generating article as described above.

One embodiment of the present application provides a control method for an aerosol generating device, wherein the aerosol generating device includes the heater, a power supply, and a control circuit, wherein the first heating portion and the fourth heating portion are respectively arranged corresponding to different parts of the aerosol generating product; the method includes:

Controlling the power supply to provide power to the first heating element;

After the first heating part reaches a preset temperature, or after the first heating element is powered for a second preset time, controlling the power supply to power the second heating element so as to increase the temperature of the second heating element;

During the heating process of the second heating element, the power supply is controlled to reduce the power provided to the first heating element, or the power supply is controlled to stop providing power to the first heating element, so that the first heating part is cooled to the same temperature as the fourth heating part.

One embodiment of the present application provides a control method for an aerosol generating device, wherein the aerosol generating device includes the heater, a power supply, and a control circuit, wherein the first heating portion and the fourth heating portion are respectively arranged corresponding to different parts of the aerosol generating product; the method includes:

Controlling the power supply to provide power to the first heating element;

controlling the power supply to provide initial power to the second heating element;

After the first heating part reaches a preset temperature, or after the initial power is supplied to the second heating element for a first preset time, or after the power is supplied to the first heating element for a second preset time, controlling the power supply to supply the second heating element with power greater than the initial power, so that the second heating element is heated up significantly;

When the second heating element is heated up significantly, the power supply is controlled to reduce the power provided to the first heating element, or the power supply is controlled to stop providing power to the first heating element, so that the first heating part is cooled to the same temperature as the fourth heating part.

The heater, aerosol generating device, aerosol generating system and control method mentioned above, the heater comprises The heater comprises a first heating element and a second heating element, wherein the first heating element has a first heating portion and a second heating portion with different heating temperatures, and the second heating element has a third heating portion and a fourth heating portion with different heating temperatures, and along the circumferential direction of the heater, at least a portion of the first heating element overlaps with the second heating element, so that the first heating element and the second heating element can interact with each other, which is beneficial for enabling the heater to bake the aerosol generating product more fully and flexibly through flexible control of the two heating elements.

BRIEF DESCRIPTION OF THE DRAWINGS

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

FIG1 is a schematic diagram of an aerosol generating device provided in one embodiment of the present application;

FIG2 is an exploded schematic diagram of a heater provided in one embodiment of the present application;

FIG3 is an exploded schematic diagram of a heater provided in another embodiment of the present application;

FIG4 is a schematic diagram of a heating element provided in an embodiment of the present application;

FIG5 is a schematic diagram of an expanded heating element provided in another embodiment of the present application;

FIG6 is a schematic diagram of the relative relationship between the first heating element and the second heating element provided in one embodiment of the present application;

FIG7 is a schematic diagram of the relative relationship between a first heating element and a second heating element provided in another embodiment of the present application;

FIG8 is a schematic diagram of a control method for an aerosol generating device provided in one embodiment of the present application;

FIG9 is a schematic diagram of a control method for an aerosol generating device provided in another embodiment of the present application;

In the figure:

1. heater; 11. heating chamber; 12. first heating element; 121. first heating portion; 122. second heating portion; 13. second heating element; 14. mesh; 15. insulating layer; 16. heat-conducting element; 17. pin; 18. first track; 19. second track;

2. Aerosol generating products;

3. Power supply assembly; 31. Power supply; 32. Circuit board.

DETAILED DESCRIPTION

The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, and are not intended to be comprehensive. All embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

The terms "first", "second", "third" in the present application are only used for descriptive purposes, and cannot be interpreted as indicating or suggesting relative importance or implicitly indicating the quantity or order of the indicated technical features. In the present application embodiment, all directional indications (such as up, down, left, right, front, back ...) are only used to explain the relative position relationship or movement conditions between the components under a certain posture (as shown in the accompanying drawings), and if the posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, the process, method, system, product or equipment comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or equipment.

Reference to "embodiments" herein means that the features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be one or more central elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

One embodiment of the present application provides an aerosol generating device and a heater 1 adapted for the aerosol generating device. The aerosol generating device is a device that is coupled or interacted with an aerosol generating article 2 to form an inhalable aerosol.

As used herein, the term "aerosol-generating article" refers to an article comprising an aerosol-forming substrate that, when heated, releases volatile compounds that can form an aerosol. In an embodiment, the aerosol-generating article is removably coupled to an aerosol-generating device. The article may be disposable or reusable.

The aerosol-forming substrate may comprise a solid aerosol-forming substrate. The solid aerosol-forming substrate may comprise a tobacco-containing material containing volatile substances which are released from the aerosol-forming substrate upon heating. The solid aerosol-forming substrate may include non-tobacco materials. The solid aerosol-forming substrate may include tobacco-containing materials and non-tobacco materials.

Aerosol formation matrix can comprise liquid aerosol formation matrix.Liquid aerosol formation matrix can comprise the liquid of tobacco-containing material that contains volatile tobacco flavor component, can also be the liquid that comprises non-tobacco material.Liquid aerosol formation matrix can comprise water, solvent, ethanol, plant extract, spices, flavoring agent or vitamin mixture etc., and spices can comprise betel nut extract, menthol, European mint, green mint oil, various fruity fragrance components etc., but is not limited to this.Flavoring agent can comprise the composition that can provide various fragrance or local flavor to the user.Vitamin mixture can be the mixture that is mixed with at least one in vitamin A, vitamin B, vitamin C and vitamin E, but is not limited to this.

The aerosol generating device has a heating chamber 11 inside, and at least a part of the aerosol generating product 2 can be combined in the heating chamber 11. The aerosol generating device can be an electrically operated device, and the heater 1 adapted for the aerosol generating device can be an electric heater, so the heater 1 can generate heat when electricity is provided, and at least part of the heat is transferred to the aerosol generating product 2 in the heating chamber 11, so that the aerosol generating product 2 is heated.

The heater 1 includes a first heating element 12 capable of generating heat and a second heating element 13 capable of generating heat. In one embodiment, referring to FIG. 3 , a heating cavity 11 is formed in the heater 1, and the first heating element 12 and the second heating element 13 are arranged around the heating cavity 11. When the aerosol generating article 2 is combined in the heating cavity 11, the first heating element 12 and the second heating element 13 are both located at the periphery of the aerosol generating article 2. In one embodiment, at least a portion of the heater is arranged in the heating cavity, and when the aerosol generating article is combined in the heating cavity, at least a portion of the heater can be inserted into the interior of the aerosol generating article.

The first heating element 12 and the second heating element 13 may both include a resistive material, and when the first heating element 12 and the second heating element 13 are provided with power, the first heating element 12 and the second heating element 13 may generate Joule heat. Suitable resistive materials include, but are not limited to, semiconductors, such as doped ceramics, conductive ceramics (e.g., molybdenum disilicide), carbon, graphite, metals, metal alloys, and composite materials made of ceramic materials and metal materials. Such composite materials may include doped or undoped ceramics. Examples of suitable doped ceramics include doped silicon carbide. Examples of suitable metals include titanium, zirconium, tantalum, and platinum group metals. Examples of suitable metal alloys include stainless steel, Constantan, nickel-containing alloys, cobalt-containing alloys, chromium-containing alloys, aluminum-containing alloys, titanium-containing alloys, zirconium-containing alloys, hafnium-containing alloys, niobium-containing alloys, molybdenum-containing alloys, tantalum-containing alloys, tungsten-containing alloys, tin-containing alloys, gallium-containing alloys, manganese-containing alloys, and iron-containing alloys, as well as superalloys based on nickel, iron, and cobalt, stainless steel, iron-aluminum-based alloys, and iron-manganese-aluminum-based alloys.

In one embodiment, the first heating element 12 and the second heating element 13 both contain a resistive material. For example, as shown in Figures 2 to 5, at least one of the first heating element 12 and the second heating element 13 is configured as a mesh body having a plurality of meshes 14 to form a grid pattern, including but not limited to a sheet-like mesh body or a tubular mesh body.

In one embodiment, at least one of the first heating element 12 and the second heating element 13 includes a substrate and a heating track coupled to the substrate, the heating track may be a heating coating or a heating circuit, or a heating coil, the substrate may be configured in a sheet shape, or in a tubular shape, and the substrate may be a thermally conductive element 16.

In some embodiments, at least one of the first heating element 12 and the second heating element 13 may include a sensor material. When used herein, the term "sensing material" refers to a material that can convert electromagnetic energy into heat. When located in a changing electromagnetic field, the eddy current induced in the sensor material causes the heating of the sensor material. In such embodiments, the sensor material is designed to engage with an aerosol generating device including a magnetic field generator. The magnetic field generator generates a changing magnetic field to heat the sensor material located in the changing magnetic field. When in use, the sensor material is located in a changing magnetic field generated by the magnetic field generator. Wherein, the magnetic field generator is electrically connected to a power supply assembly, and the power supply assembly provides the magnetic field generator with a current that generates a changing magnetic field. The magnetic field generator may include one or more induction coils that generate a changing magnetic field, and the one or more induction coils may surround the sensor material. In one embodiment, the aerosol generating device is capable of generating a changing magnetic field between 1 and 30 MHz, such as between 2 and 10 MHz, such as between 5 and 7 MHz. In an embodiment, the aerosol generating device is capable of generating a varying magnetic field having a field strength (H field) between 1 and 5 kA/m, such as between 2 and 3 kA/m, such as about 2.5 kA/m.

Wherein, the sensing material may include metal or carbon. In one embodiment, the sensing material may include a ferromagnetic material, such as ferrite, ferromagnetic steel or stainless steel. In one embodiment, the sensing material includes a nickel-iron alloy. In one embodiment, the sensing material includes 400 series stainless steel, which includes 410 grade or 420 grade or 430 grade stainless steel. Different materials will dissipate different amounts of energy when positioned in an electromagnetic field with similar frequency and field strength values. Therefore, the parameters of the sensing material, such as material type, length, width and thickness, can all be changed to provide the desired power dissipation in a known electromagnetic field.

In some embodiments, at least one of the first heating element 12 and the second heating element 13 may include a light-transmitting substrate and an infrared electrothermal coating combined with the light-transmitting substrate. The infrared electrothermal coating can generate heat energy when powered, thereby generating infrared rays of a certain wavelength, for example, infrared rays of 0.75 μm to 1000 μm. The infrared electrothermal coating may be made of far-infrared electrothermal ink, ceramic powder and inorganic adhesive. After stirring evenly, it is coated on the surface of the substrate, and then dried and cured for a certain period of time. The thickness of the infrared electric heating coating is 30μm-50μm; of course, the infrared electric heating coating can also be made of tin tetrachloride, tin oxide, antimony trichloride, titanium tetrachloride and anhydrous copper sulfate mixed and stirred in a certain proportion and then coated on the outer surface of the substrate; or it can be a silicon carbide ceramic layer, a carbon fiber composite layer, a zirconium-titanium oxide ceramic layer, a zirconium-titanium nitride ceramic layer, a zirconium-titanium boride ceramic layer, a zirconium-titanium carbide ceramic layer, an iron oxide ceramic layer, an iron nitride ceramic layer, an iron boride ceramic layer, an iron carbide ceramic layer, a rare earth oxide ceramic layer, a rare earth nitride ceramic layer, a rare earth boride ceramic layer, a rare earth carbide ceramic layer, a nickel-cobalt oxide ceramic layer, a nickel-cobalt nitride ceramic layer, a nickel-cobalt boride ceramic layer, a nickel-cobalt carbide ceramic layer or a high silicon molecular sieve ceramic layer; the infrared electric heating coating can also be one of the existing other material coatings.

Part of the first heating element 12 constitutes the first heating portion 121, and part of the first heating element 12 constitutes the second heating portion 122. In one example, the first heating portion 121 and the second heating portion 122 can generate heat at the same time, so that the first heating portion 121 and the second heating portion 122 can heat different parts of the aerosol generating article 2 at the same time.

For example, as shown in FIG4 , the first heating portion 121 is provided with a first mesh 141, the second heating portion 122 is provided with a second mesh 142, and the first heating element 12 further includes two pins 17, which are arranged at intervals along the circumferential direction of the first heating element 12, so as to guide the current to pass through the first heating portion 121 and the second heating portion 122 simultaneously in the circumferential direction. The second heating element 13 can also be configured in the same manner, and guide the current to pass through the third heating portion 131 and the fourth heating portion 132 simultaneously in the circumferential direction through the two pins 17.

For example, the first heating element 12 includes a plurality of independent heating tracks and two pins 17, and the two pins 17 are connected at opposite ends of the entire heating track. The two pins 17 are arranged at intervals along the circumferential direction of the first heating element 12, so as to guide the current to pass through the first heating portion 121 and the second heating portion 122 in the circumferential direction at the same time. The axial spacing between two adjacent heating tracks in the first heating portion 121 can be smaller than the axial spacing between two adjacent heating tracks in the second heating portion 122. The second heating element 13 can also be configured in the same manner, and the two pins 17 can guide the current to pass through the third heating portion 131 and the fourth heating portion 132 in the circumferential direction at the same time.

For example, as shown in FIG5 , the first heating element 12 includes a heating track and two pins 17, and the two pins 17 are connected to opposite ends of the heating track. The heating track includes a plurality of first tracks and a plurality of second tracks that are alternately connected, so that the current between the two pins 17 can flow through a plurality of first tracks 18 and a plurality of second tracks 19 in sequence and alternately along the heating track. The first tracks 18 are all distributed in the first heating portion 121, and the second tracks 19 are all distributed in the second heating portion 122. The widths may be different. The two pins 17 are arranged at intervals along the circumferential direction of the first heating element 12, respectively, to guide the current through the first heating portion 121 and the second heating portion 122 mainly in the axial direction at the same time. The second heating element 13 may also be arranged in the same manner, and the two pins 17 guide the current through the third heating portion 131 and the fourth heating portion 132 in the axial direction at the same time.

For example, the first heating part 121 can be respectively provided with corresponding pins, and the second heating part 122 can also be respectively provided with its corresponding pins, and some common pins can also be used between the first heating part 121 and the second heating part 122; through circuit design and control of the pins, the first heating part 121 and the second heating part 122 can be connected in series or in parallel.

When the first heating part 121 and the second heating part 122 generate heat at the same time, the heating temperature of the first heating part 121 may be greater than the heating temperature of the second heating part 122. In the same heating time, the first heating part 121 has a faster heating speed or a higher temperature than the second heating part 122. It should be noted that the "heating temperature of the first heating part 121" described in the embodiment of the present application refers to the average temperature of the first heating part 121 at a certain moment when the first heating element 12 is working without the interference and influence of the second heating element 13 and other heating elements when the first heating element 12 exists independently; the "heating temperature of the second heating part 122" described in the embodiment of the present application refers to the average temperature of the second heating part 122 at a certain moment when the first heating element 12 is working without the interference and influence of the second heating element 13 and other heating elements when the first heating element 12 exists independently.

based on Wherein, R is the resistance value of the heating element, ρ is the resistivity of the heating element, L is the extension length of the heating element along the current direction, and S is the cross-sectional area of the heating element perpendicular to the current direction. Therefore, in some embodiments, the materials of the first heating portion 121 and the second heating portion 122 are different, and the material of the first heating portion 121 has a greater resistivity than the material of the second heating portion 122, so that the heating resistance per unit area of the first heating portion 121 is greater than the heating resistance per unit area of the second heating portion 122. In some embodiments, the cross-sectional area S of the first heating element 12 in the first heating portion 121 is smaller than the cross-sectional area S of the first heating element 12 in the second heating portion 122. Thus, the heating resistance per unit area of the first heating portion 121 is greater than the heating resistance per unit area of the second heating portion 122. In some embodiments, the extension length L of the first heating portion 121 is greater than the extension length L of the second heating portion 122. Thus, the heating resistance per unit area of the first heating portion 121 is greater than the heating resistance per unit area of the second heating portion 122. In some embodiments, at least two of the resistivity, extension length L and cross-sectional area S in the first heating portion 121 are combined and adjusted so that the heating resistance per unit area of the first heating portion 121 is greater than the heating resistance per unit area of the second heating portion 122 .

In some embodiments, the first heating element 12 is configured as a mesh body having a grid pattern, and the first heating portion 121 and the second heating portion 122 both include a plurality of meshes 14, the meshes 14 in the first heating portion 121 are defined as first meshes 141, and the meshes 14 in the second heating portion 122 are defined as second meshes 142, a first track 18 through which current can pass is formed between the plurality of first meshes 141, and a second track 19 through which current can pass is formed between the plurality of second meshes 142. In this embodiment, by setting the area, number, and/or shape of the first meshes 141 and the second meshes 142, the extension length L and/or cross-sectional area S of the first track 18 and the second track 19 are adjusted, so that the first heating portion 121 and the second heating portion 122 can also generate a temperature difference when heating at the same time.

Specifically, in one embodiment, as shown in FIG4 , within the same area, the number of the first meshes 141 and the second meshes 142 are the same, and the area of the first meshes 141 is smaller than the area of the second meshes 142, so that the cross-sectional area S of the first track 18 is larger than the cross-sectional area S of the second track 19, thereby making the resistance of the first track 18 smaller than the resistance of the second track 19. Specifically, the areas of the first meshes 141 and the second meshes 142 are set as follows: the extension dimension of the first meshes 141 along the axial direction of the heater 1 is set to be smaller than the extension dimension of the second meshes 142 along the axial direction of the heater 1; and/or, the extension dimension of the first meshes 141 along the circumferential direction of the heater 1 is set to be smaller than the extension dimension of the second meshes 142 along the circumferential direction of the heater 1.

Specifically, in some embodiments, within the same area, the area of the first mesh 141 is the same as the area of the second mesh 142, and the number of the first meshes 141 is less than the number of the second meshes 142, so that the extension length L of the first track 18 is less than the extension length L of the second track 19, so that the resistance of the first track 18 is less than the resistance of the second track 19.

Specifically, in some embodiments, the area of the first heating portion 121 is larger than that of the second heating portion 122 , and in the first heating portion 121 and the second heating portion 122 , the area of the first mesh 141 is the same as the area of the second mesh 142 , and the number of the first mesh 141 is also the same as the number of the second mesh 142 .

Applying the above embodiment, when the two pins 17 are arranged at intervals along the circumferential direction of the first heating element 12 so as to guide current through the first heating part 121 and the second heating part 122 simultaneously in the circumferential direction, the temperature of the first heating part 121 formed by the multiple first tracks 18 is greater than that of the second heating part 121 formed by the multiple second tracks 19.

In some embodiments, as shown in FIG. 4 , the first mesh 141 and the second mesh 142 extend along the circumferential direction of the heater 1, and a plurality of first tracks 18 (the dotted line in the figure represents one of the current tracks, i.e., one of the first tracks 18) are formed between the plurality of first meshes 141 and the plurality of second tracks 19 (the dotted line in the figure represents one of the current tracks, i.e., one of the first tracks 18). The current track, that is, a first track 19, forms a plurality of second meshes 142 between the first track 18 and the second track 19. Alternatively, as shown in FIG5 , the first mesh 141 is connected with the corresponding second mesh 142, and the same heating track is bent and extended back and forth to form a plurality of opened meshes 14, and the plurality of first tracks 18 arranged in the first heating portion 121 are alternately connected with the plurality of second tracks 19 arranged in the second heating portion 122. At this time, under the same area, the number of the first meshes 141 is the same as the number of the second meshes 142, and the area of the first meshes 141 is larger than the area of the second meshes 142, so that the cross-sectional area S of the first track 18 is smaller than the cross-sectional area S of the second track 19, so that the resistance of the first track 18 is greater than the resistance of the second track 19. When the two pins 17 are respectively arranged at opposite ends of the heating track, the same current passes through the first track 18 and the second track 19 alternately, so that the temperature of the first heating portion 121 composed of the plurality of first tracks 18 is greater than the second heating portion 121 composed of the plurality of second tracks 19.

It should be noted that other methods may be used to ensure that the first heating portion 121 and the second heating portion 122 generate heat simultaneously and that the heating temperature of the first heating portion 121 is greater than the heating temperature of the second heating portion 122 .

It should be noted that the first heating portion 121 and the second heating portion 122 on the first heating element 12 may be an integral structure. For example, when the first heating element 12 is a mesh body, the first heating portion 121 and the second heating portion 122 are two different regions on the mesh body.

It can be understood that the first heating element 12 can also have other heating parts, which can be one or more. The other heating parts can generate heat simultaneously with the first heating part 121 and the second heating part 122, and the heating temperature of the other heating parts can be different from the heating temperature of at least one of the first heating part 121 and the second heating part 122.

Different from the above example in which the second heating part 122 can obtain substantially the same voltage or current as the first heating part 121 to generate heat, in another example, when the power supply 31 provides power to the first heating element 12, the first heating part 121 can obtain most or all of the provided power and generate Joule heat or infrared rays based on the power obtained, while the second heating part 122 can only obtain a small amount of power or no current passes through the second heating part 122, so that the second heating part 122 can only generate a small amount of Joule heat autonomously or cannot generate Joule heat.

When the power source 31 provides power to the first heating element 12, the second heating portion 122 can only obtain a small amount of power or no power, while the first heating portion 121 can obtain more power and can more efficiently convert electrical energy into heat energy. Therefore, after the first heating element 12 is working, the temperature of the first heating portion 121 in the first heating element 12 will be higher than the temperature of the second heating portion 122. In this example, the second heat-generating part 122 can be made of a material with high thermal conductivity, such as metal, graphite or graphite alloy, and the second heat-generating part 122 is connected to or adjacent to the first heat-generating part 121, so that the second heat-generating part 122 can absorb heat from the first heat-generating part 121 to increase its temperature.

Alternatively, when the power supply 31 provides power to the magnetic field generator so that the magnetic field generator generates a changing magnetic field, the second heating portion 122 in the first heating element 12 is outside the range of the changing magnetic field, or the second heating portion 122 cannot generate heat in the changing magnetic field, while the first heating portion 121 is in the changing magnetic field and can generate heat in the changing magnetic field, so that the temperature of the first heating portion 121 in the first heating element 12 can be higher than the temperature of the second heating portion 122. In this example, the second heating portion 122 can be made of a material with high thermal conductivity, such as metal, graphite, or graphite alloy, and the second heating portion 122 is connected to or adjacent to the first heating portion 121.

In summary, when the power supply 31 provides power to the first heating element 12 to make the first heating element 12 work, or when the power supply 31 provides power to the magnetic field generator to make the first heating element 12 work, or when the first heating element 12 works in other ways, the temperature of the first heating portion 121 in the first heating element 12 is higher than the temperature of the second heating portion 122. The second heating portion 122 may generate heat autonomously, for example, the second heating portion 122 may generate heat or infrared rays by obtaining power, or the second heating portion 122 may generate heat based on a changing magnetic field; or the second heating portion 122 may not generate heat autonomously, and its temperature rise is mainly caused by absorbing heat, thereby causing its temperature to be lower than the temperature of the first heating portion 121.

It should be emphasized that the heating temperature of the first heating part 121 is higher than the heating temperature of the second heating part 122 , which means that when the first heating element 12 is working, the temperature of the first heating part 121 in the first heating element 12 is higher than the temperature of the second heating part 122 .

Part of the second heat generating element 13 constitutes the third heat generating portion 131 , and part of the second heat generating element 13 constitutes the fourth heat generating portion 132 .

When the power source 31 provides power to the second heating element 13 to make the second heating element 13 work, or when the power source 31 provides power to the magnetic field generator to make the second heating element 13 work, or when the second heating element 13 works in other ways, the temperature of the fourth heating part 132 in the second heating element 13 is higher than the temperature of the third heating part 131. The third heating part 131 can generate heat autonomously, for example, the third heating part 131 can obtain power to generate heat or generate infrared rays, or the third heating part 131 can generate heat based on a changing magnetic field; or the third heating part 131 can not generate heat autonomously, and its temperature rise is mainly caused by absorbing heat, so that its temperature is lower than the temperature of the fourth heating part 132.

It should be emphasized that the heating temperature of the fourth heating part 132 is higher than the heating temperature of the third heating part 131 , which means that when the second heating element 13 is working, the temperature of the fourth heating part 132 in the second heating element 13 is higher than the temperature of the third heating part 131 .

In one embodiment, when the first heating element 12 is in working state, for example, when the first heating portion 121 reaches a preset temperature, there is a first temperature difference ΔT1 between the first heating portion 121 and the second heating portion 122. When the first heating portion 121 reaches its preset temperature, the heat released by the first heating portion 121 can cause the aerosol generating article 2 in the corresponding area of the heating chamber 11 to generate aerosol. When the first heating portion 121 reaches the preset temperature, the second heating portion 122 may also have a certain temperature. The heat released by the second heating portion 122 cannot cause the aerosol generating article 1 in the corresponding area of the heating chamber 11 to generate aerosol, but the heat released by the second heating portion 122 can preheat the aerosol generating article 2 in the corresponding area of the heating chamber 11, or can keep the aerosol generating article 2 in the corresponding area of the heating chamber 11 warm.

Similarly, when the second heating element 13 is in operation, for example, when the fourth heating portion 132 reaches a preset temperature, there is a second temperature difference ΔT2 between the fourth heating portion 132 and the third heating portion 131. When the fourth heating portion 132 reaches its preset temperature, the heat released by the fourth heating portion 132 can cause the aerosol generating product 2 in the corresponding area of the heating chamber 11 to generate aerosol. When the second heating element 13 is in operation, the third heating portion 131 may also have a certain temperature. The heat released by the third heating portion 131 cannot cause the aerosol generating product 2 in the corresponding area of the heating chamber 11 to generate aerosol, but the heat released by the third heating portion 131 can preheat the aerosol generating product 2 in the corresponding area of the heating chamber 11, or can keep the aerosol generating product 2 in the corresponding area of the heating chamber 11 warm.

When the first heating part 121 reaches the preset temperature, the first temperature difference ΔT1 may be between 100°C and 200°C, that is, 100°C≤ΔT1≤200°C. More specifically, the first temperature difference ΔT1 may be between 150°C and 200°C, that is, 150°C≤ΔT1≤200°C.

When the fourth heating portion 132 reaches the preset temperature, the second temperature difference ΔT2 may be between 100°C and 200°C, that is, 100°C≤ΔT2≤200°C. More specifically, the second temperature difference ΔT2 may be between 150°C and 200°C, that is, 150°C≤ΔT2≤200°C.

The first temperature difference ΔT1 may be equal to the second temperature difference ΔT2.

When at least a portion of the first heating portion 121 is located above at least a portion of the fourth heating zone 132, the first temperature difference ΔT1 may be greater than the second temperature difference ΔT2. The upper end of the heating chamber 11 is open to allow aerosol generation. When the product 2 enters and at least a portion of the first heating portion 121 is located at least partially above the fourth heating zone 132 , the first heating portion 121 is closer to the upper end of the heating chamber 11 than the fourth heating zone 132 .

The heater 1 further includes an insulating layer 15. Along the circumferential direction of the heater 1, at least a portion of the first heating element 12 may overlap with the second heating element 13. The insulating layer 15 is disposed between the first heating element 12 and the second heating element 13 to prevent the first heating element 12 and the second heating element 13 in the overlapping region from being electrically connected. The insulating layer 15 may be formed on the surface of the first heating element 12 and/or the second heating element 13 by spraying, wrapping or the like, so that at least a portion of the insulating layer 15 is disposed between the first heating element 12 and the second heating element 13. The insulating layer 15 may be a separation element, and the first heating element 12 and the second heating element 13 are disposed on opposite sides of the insulating layer 15.

In one embodiment, referring to FIG. 7 , the first heating portion 121 and the second heating portion 122 are arranged along the circumferential direction of the heating chamber 11, so that in the axial direction of the heater 1, the upper end of the first heating portion 121 can be flush with the upper end of the second heating portion 122, and the lower end of the first heating portion 121 can be flush with the lower end of the second heating portion 122. In some embodiments, the third heating portion 131 and the fourth heating portion 132 are arranged along the circumferential direction of the heater 1, so that in the axial direction of the heater 1, the upper end of the third heating portion 131 can be flush with the upper end of the fourth heating portion 132, and the lower end of the third heating portion 131 can be flush with the lower end of the fourth heating portion 132, but the present invention is not limited thereto.

Based on this, in one example, referring to Figure 7, in the circumferential direction of the heater 1, at least a part of the first heating portion 121 does not overlap with the fourth heating portion 132, or at least a part of the first heating portion 121 overlaps with the third heating portion 131, so that at least a part of the relatively high temperature area on the first heating element 12 and the relatively high temperature area on the second heating element 13 are in different positions in the circumferential direction of the heater 1, and at least a part of the relatively high temperature area on the first heating element 12 can overlap with the relatively low temperature area on the second heating element 13 in the circumferential direction of the heater 1.

More specifically, referring to Figure 7, in the circumferential direction of the heater 1, the first heating portion 121 may not overlap with the fourth heating portion 132 at all, or the first heating portion 121 completely overlaps with the third heating portion 131, or the relatively high temperature area of the first heating element 12 completely corresponds to the relatively low temperature area of the second heating element 13, and the relatively low temperature area of the first heating element 12 completely corresponds to the relatively high temperature area of the second heating element 13.

In one embodiment, referring to FIG. 2 , the first heating portion 121 and the second heating portion 122 are arranged along the axial direction of the heater 1 , and the mouthpiece provided on the aerosol generating device or the aerosol generating product 2 for the user to hold in the mouth is defined to be located above the heater 1 in the axial direction of the heater 1 . Or it is defined that in normal usage, the side of the aerosol generating device or aerosol generating product 1 facing away from the ground is the upper side. With this as a reference, in the axial direction of the heater 1, the first heating part 121 is located above the second heating part 122, and the third heating part 131 is located above the fourth heating part 132.

Based on this, in one example, referring to Figure 6, at least a portion of the first heating portion 121 does not overlap with the fourth heating portion 132 in the axial direction of the heater 1, and at least a portion of the first heating portion 121 overlaps with the third heating portion 131 in the axial direction of the heater 1, so that at least a portion of the relatively high temperature area of the first heating element 12 can be set to correspond to the relatively low temperature area of the second heating element 13, that is, at least a portion of the relatively high temperature area of the first heating element 12 and at least a portion of the relatively low temperature area of the second heating element 13 can heat the same portion of the aerosol generating product 2.

At the same time, at least a portion of the fourth heating portion 132 can overlap with the second heating portion 122 in the axial direction of the heater 1, so that at least a portion of the relatively high temperature area of the second heating element 13 can be set corresponding to the relatively low temperature area of the first heating element 12, that is, at least a portion of the relatively high temperature area of the second heating element 13 and at least a portion of the relatively low temperature area of the first heating element 12 can heat the same portion of the aerosol generating product 2.

As an example, at least a part of the first heating portion 121 overlaps with the fourth heating portion 132 in the axial direction of the heater 1, so that at least a part of the relatively high temperature area of the first heating element 12 can be set corresponding to the relatively high temperature area of the second heating element 13. That is, at least a part of the relatively high temperature area of the first heating element 12 and at least a part of the relatively high temperature area of the second heating element 13 can heat the same part of the aerosol generating article 2. Thus, the preset part on the aerosol generating article 2 can be heated in a superimposed manner to improve the heating efficiency of the preset part on the aerosol generating article 2, which helps to speed up the speed at which the aerosol generating article 2 generates the first aerosol.

As an example, the first heating portion 121 does not overlap with the fourth heating portion 132 at all, so as to prevent the same portion of the aerosol generating product 2 from being overheated, burnt or burned due to at least a portion of the relatively high temperature area on the first heating portion 121 and at least a portion of the relatively high temperature area on the fourth heating portion 132 heating the same portion of the aerosol generating product 2 at the same time.

Based on this, in the embodiment shown in FIG. 6 , the first heating portion 121 does not overlap with the fourth heating portion 132 at all: the first heating portion 121 in the first heating element is located above the second heating portion 122, the third heating portion 131 in the second heating element 13 is located above the fourth heating portion 132, and the lower end of the first heating portion 121 is flush with the upper end of the fourth heating portion 132; or The lower end of the first heat generating portion 121 is located above the upper end of the fourth heat generating portion 132 , and the lower end of the first heat generating portion 121 and the upper end of the fourth heat generating portion 132 are spaced apart from each other in the axial direction of the heater 1 .

When the first heating portion 121 in the first heating element 12 is located above the second heating portion 122, and the third heating portion 131 in the second heating element is located above the fourth heating portion 132, the upper end of the first heating portion 121 may be flush with the upper end of the third heating portion 131, or the upper end of the first heating portion 121 may be spaced apart from the upper end of the third heating portion 131 in the axial direction of the heater 1. That is, in the axial direction of the heater 1, the length of the first heating portion 121 may be equal to or unequal to the length of the third heating portion 131.

When the first heating portion 121 in the first heating element 12 is located above the second heating portion 122, and the third heating portion 131 in the second heating element is located above the fourth heating portion 132, the lower end of the second heating portion 122 may be flush with the lower end of the fourth heating portion 132, or the lower end of the second heating portion 122 is spaced from the lower end of the fourth heating portion 132 in the axial direction of the heater 1. That is, in the axial direction of the heater 1, the length of the second heating portion 122 may be equal to or unequal to the length of the fourth heating portion 132.

In summary, by making at least a portion of the first heating element 12 overlap with the second heating element 13 in the circumferential direction/axial direction of the heater 1, at least a portion of the relatively high temperature area of the first heating element 12 and at least a portion of the relatively high temperature area of the second heating element 13 can respectively heat different parts of the aerosol generating product 2. At the same time, at least a portion of the relatively high temperature area of the first heating element 12 and at least a portion of the relatively low temperature area of the second heating element 13, at least a portion of the relatively high temperature area of the second heating element 13 and at least a portion of the relatively low temperature area of the first heating element 12 can cooperate with each other to improve the heating efficiency of the sol generating product 2 and help the sol generating product 2 to be more fully and evenly heated, which is beneficial to improving the quality of the aerosol generated by the sol generating product 2.

If the second heating part 122 and the first heating part 121 can generate heat at the same time, when the first heating part 121 generates heat to cause the aerosol generating product 2 in the corresponding area to generate aerosol, the second heating part 122 can also generate heat at the same time to preheat or keep warm the aerosol generating product 2 in the area corresponding to the second heating part 122.

If the third heating portion 131 and the fourth heating portion 132 can generate heat at the same time, when the fourth heating portion 132 generates heat to cause the aerosol generating product 2 in the corresponding area to generate aerosol, the third heating portion 131 can also generate heat at the same time to preheat or keep warm the aerosol generating product 2 in the area corresponding to the third heating portion 131.

By setting the positions or overlapping relationship between the first heating part 121 in the first heating element 12 and the fourth heating part 132 in the second heating element 13, the first heating element 12 and the second heating element 13 can perform high-temperature heating on different parts of the aerosol generating product 2, so that aerosols are generated in different parts of the aerosol generating product 2.

The working time or working order of the first heating element 12 and the second heating element 13 can be set so that different parts of the aerosol generating article 2 generate aerosol at different times.

The second heating portion 122 in the first heating element 12 and the third heating portion 131 in the second heating element 13 can be used to respectively keep different sections of the aerosol generating article 2 warm or preheat them, thereby improving the heating efficiency and helping to ensure the consistency of the aerosol generated by the aerosol generating article 2.

When the first heating portion 121 in the first heating element 12 is located above the second heating portion 122, and the third heating portion 131 in the second heating element is located above the fourth heating portion 132, referring to Figure 6, in the axial direction of the heater 1, the length of the second heating portion 122 can be greater than or equal to the length of the first heating portion 121, so that the length of the aerosol generating article 2 heated by the first heating portion 121 can be less than or equal to the length heated by the second heating portion 122.

At the same time, in the axial direction along the heater 1, the length of the third heating portion 131 can be less than or equal to the length of the fourth heating portion 132, that is, the length of the aerosol generating article 2 heated by the third heating portion 131 can be less than or equal to the length heated by the fourth heating portion 132.

When at least a part of the first heating portion 121 in the first heating element 12 is located above the fourth heating portion 132 in the second heating element, referring to FIG. 6 , in the axial direction of the heater 1, the length of the first heating portion 121 may be less than or equal to the length of the fourth heating portion 132, and the heating length of the aerosol generating article 2 by the fourth heating portion 132 is greater than or equal to the heating length of the aerosol generating article 2 by the first heating portion 121.

One of the first heating element 12 and the second heating element 13 may completely cover the other, for example, in the axial direction of the heater 1, the first heating element 12 and the second heating element 13 may have the same length, for example, the upper end of the first heating element 12 may be flush with the upper end of the second heating element 13, and the lower end of the first heating element 12 may be flush with the lower end of the second heating element 13. The length of the first heating element 12 may be greater than or equal to the length of the aerosol-forming substrate segment, and/or the length of the second heating element 13 may be greater than or equal to the length of the aerosol-forming substrate segment.

In one embodiment, when the first heating element 12 and the second heating element 13 work until the first heating portion 121 reaches its preset temperature and the fourth heating portion 132 reaches its preset temperature, the first heating portion 121 and the fourth heating portion 132 are connected. The temperature of the third heating portion 121 is greater than the temperature of the third heating portion 131, and the temperature of the fourth heating portion 132 is greater than the temperature of the second heating portion 122. It should be noted that the "temperature of the third heating portion 131" described in the embodiment of the present application refers to the average temperature of the third heating portion 131 at a certain moment when the second heating element 13 is working without the interference and influence of the first heating element 12 and other heating elements when the second heating element 13 exists independently; the "temperature of the fourth heating portion 132" described in the embodiment of the present application refers to the average temperature of the fourth heating portion 132 at a certain moment when the second heating element 13 is working without the interference and influence of the first heating element 12 and other heating elements when the second heating element 13 exists independently.

In one embodiment, referring to FIG. 2 and FIG. 3 , the heater 1 further includes a heat-conducting element 16, and in the circumferential direction of the heater 1, at least a portion of the heat-conducting element 16 overlaps with the first heating element 12, and at least a portion of the heat-conducting element 16 overlaps with the second heating element 13. The first heating element 12 and the second heating element 13 may be disposed on the same side of the heat-conducting element 16, the first heating element 12 may be located between the second heating element 13 and the heat-conducting element 16, or the second heating element 13 may be located between the first heating element 12 and the heat-conducting element 16.

Compared with the first heating element 12 and the second heating element 13, the heat-conducting element 16 can be closer to the aerosol-generating article 2 located in the heating chamber 11. The heat-conducting element 16 can even contact the aerosol-generating article 2 contained in the heating chamber 11. In some embodiments, the heat-conducting element 16 can define at least a portion of the boundary of the heating chamber 11, and at least a portion of the aerosol-generating article 2 can be surrounded by the heat-conducting element 16.

The heat conducting element 16 absorbs the heat generated by the first heating element 12 and/or the second heating element 13 to increase in temperature, and then transfers at least a portion of the absorbed heat to the aerosol generating article 2 to heat and bake the corresponding parts of the aerosol generating article 2 .

In order to reduce the heat consumption of the heat-conducting element 16, the heat-conducting element 16 can be made of a heat-conducting material. The heat-conducting material can be understood as a material having a thermal conductivity of at least 10W/(m·k) at 23°C and a relative humidity of 50%, preferably at least 40W/(m·k), and more preferably at least 100W/(m·k). Specifically, the support tube is formed of a material having a thermal conductivity of at least 40W/(m·k) at 23°C and a relative humidity of 50%, preferably at least 100W/(m·k), more preferably at least 150W/(m·k), and most preferably at least 200W/(m·k). Suitable heat-conducting materials include but are not limited to: graphite, graphene, aluminum, copper, zinc, steel, silver, heat-conducting polymers, or any combination or alloy thereof. More preferably, the thermal conductivity of the heat-conducting element 16 can be at least 350W/(m·k). It is understandable that in other embodiments, the heat conducting element 16 may also be made of materials such as ceramics that can withstand temperatures of 400° C. and above.

The control circuit on the circuit board 32 can control the power supply 31 to provide power to the first heating element 12 and the second heating element 13. After the control circuit receives the instruction to start heating, the control circuit can control the power supply 31 to provide power to the first heating element 12 and the second heating element 13, so that the first heating element 12 and the second heating element 13 work and generate heat in a certain order instead of working and generating heat at the same time. Alternatively, the first heating element 12 and the second heating element 13 can work and generate heat at the same time. Alternatively, one of the first heating element 12 and the second heating element 13 can work and generate heat before the other. Alternatively, the first heating element 12 and the second heating element 13 can both work and generate heat at the same time, and then one of them can stop or pause working and generating heat.

In one embodiment, when at least a portion of the first heating portion 121 is located above the fourth heating portion 132 in the axial direction of the heater 1, after receiving the instruction to start heating, the control circuit controls the first heating element 12 to operate and generate heat before the second heating element 13, so that the downstream portion of the aerosol generating article 2 generates aerosol and helps the user to inhale the aerosol generated by the aerosol generating article 2 in a shorter time. Then, the control circuit can control the power supply 31 to provide power to the second heating element 13, so that the second heating element 13 operates and generates heat, so that the upstream portion of the aerosol generating article 2 generates aerosol. When the aerosol generating article 2 has a relatively long length, especially when the aerosol forming matrix section in the aerosol generating article 2 has a relatively long length, for example, when the length of the aerosol generating article 2 is greater than or equal to 50 mm, or when the length of the aerosol forming matrix section is greater than or equal to 15 mm, since at least part of the first heating portion 121 is located above the fourth heating portion 132, when the first heating element 12 works and generates heat before the second heating element 13, it is beneficial for the aerosol generating article 2 to quickly release aerosol, and the time for the user to wait for the first puff of smoke can be shortened. When the aerosol generating article 2 is inhaled, inside the aerosol generating article 2, the airflow flows from the upstream portion of the aerosol generating article 2 to the downstream portion thereof.

In one embodiment, referring to FIG. 8 , the first heating portion 121 and the fourth heating portion 132 are respectively arranged corresponding to different parts of the aerosol generating product 2. After the control circuit receives the instruction to start heating, it first controls the power supply 31 to provide power to the first heating element 12, so that the first heating portion 121 is heated up or can reach its preset temperature.

After the first heating portion 121 reaches a preset temperature, or after the power supply 31 provides power to the first heating element 12 for a second preset time, the control circuit controls the power supply 31 to provide power to the second heating element 13 to heat up the second heating element 13 .

During the heating process of the second heating element 13, the control circuit controls the power supply 31 to reduce the power provided to the first heating element 12, or controls the power supply 31 to stop providing power to the first heating element 12, so that The first heating portion 121 cools down. When the temperature of the first heating portion 121 decreases relative to its preset temperature, the fourth heating portion 132 continues to heat up, and the temperature of the first heating portion 121 can be equal to the temperature of the fourth heating portion 132 .

In one embodiment, referring to FIG. 9 , the first heating portion 121 and the fourth heating portion 132 are respectively arranged corresponding to different parts of the aerosol generating product 2. After the control circuit receives the instruction to start heating, it first controls the power supply 31 to provide power to the first heating element 12; at the same time or afterwards, it controls the power supply 31 to provide initial power to the second heating element 13, so that the time when the second heating element 13 obtains the initial power is not earlier than the time when the first heating element 12 obtains the power.

The initial power provided by the power supply 31 to the second heating element 13 can be less than the power provided by the power supply 31 to the first heating element 12, so that within the first preset time or within the second preset time, the temperature of the first heating portion 121 in the first heating element 12 is higher than the temperature of the fourth heating portion 132 of the second heating element 13.

After the first heating part 121 reaches the preset temperature, or after the power supply 31 provides initial power to the second heating element 13 for a first preset time, or after the power supply 31 provides power to the first heating element 12 for a second preset time, the control circuit controls the power supply 31 to provide the second heating element 13 with power greater than the initial power, so that the second heating element 13 can be greatly heated.

When the second heating element 13 is heated up significantly, the control circuit controls the power supply 31 to reduce the power provided to the first heating element 12, or controls the power supply 31 to stop providing power to the first heating element 12, so as to cool down the first heating part 121. While the temperature of the first heating part 121 is lowered relative to its preset temperature, the fourth heating part 132 is continuously heated up, and the temperature of the first heating part 121 can be equal to the temperature of the fourth heating part 132.

Based on any of the above embodiments, before the temperature of the first heating portion 121 is equal to the temperature of the fourth heating portion 132, the heater 1 mainly heats the aerosol generating article 2 through the first heating portion 121, and causes the aerosol generating article 2 to generate aerosol, that is, the aerosol generating article 2 mainly generates aerosol from the portion corresponding to the first heating portion 121. During this period, the second heating portion 122 may preheat the portion on the aerosol generating article 2 corresponding to the fourth heating portion 132; or the second heating portion 122 may preheat the fourth heating portion 132, so that the fourth heating portion 132 has an initial temperature higher than the ambient temperature.

Based on any of the above embodiments, after the temperature of the first heating portion 121 is equal to the temperature of the fourth heating portion 132, the temperature of the fourth heating portion 132 continues to rise until it reaches its preset temperature. In the process, the heater 1 finally heats the aerosol generating product 2 mainly through the fourth heating portion 132, and causes the aerosol generating product 2 to generate aerosol, that is, the aerosol generating product 2 mainly generates aerosol from the portion corresponding to the fourth heating portion 132. During this period, the third heating portion 131 can keep the portion of the aerosol generating product 2 corresponding to the first heating portion 121 warm.

Based on any of the above embodiments, as the temperature of the first heating part 121 decreases and the temperature of the fourth heating part 132 increases until the temperature of the first heating part 121 is equal to the temperature of the fourth heating part 132, the temperature difference between the first heating part 121 and the fourth heating part 132 gradually decreases.

After the temperature of the first heating portion 121 is equal to the temperature of the fourth heating portion 132, the temperature of the first heating portion 121 can continue to decrease until it reaches stability, or can be maintained at a lower temperature under low power, and the temperature of the fourth heating portion 132 continues to increase until it reaches its preset temperature. In this process, the temperature difference between the fourth heating portion 132 and the first heating portion 121 can first gradually increase, and then basically remain stable.

In one embodiment in which the control circuit controls the power supply 31 to provide power to the first heating element 12 and the second heating element, during the process in which the temperature difference between the first heating portion 121 and the fourth heating portion 132 decreases and increases, the portion of the aerosol generating article 2 where the aerosol is mainly generated gradually shifts from the portion corresponding to the first heating portion 121 to the portion corresponding to the fourth heating portion 132. This is beneficial to ensure that the aerosol generating article 2 can provide a stable aerosol output and can ensure the consistency of the taste of the aerosol when inhaled.

At certain moments in this process, the portion of the aerosol-generating article 2 corresponding to the first heating portion 121 and the portion corresponding to the fourth heating portion 132 may generate aerosol simultaneously, so as to further ensure the consistency of the smoking taste.

It should be noted that, compared with the control circuit controlling the power supply 31 to directly stop providing power to the first heating element 12, making the power supply 31 reduce the power provided to the first heating element 12 is more conducive to preventing the temperature of the first heating part 121 from decreasing too quickly or preventing the temperature of the first heating part 121 from decreasing too much, and can avoid a significant reduction in the amount of aerosol while the temperature of the first heating part 121 decreases.

It should be noted that after the temperature of the first heating part 121 drops and before the temperature of the first heating part 121 is equal to the temperature of the fourth heating part 132, the control circuit can control the power supply 31 to provide a larger power to the second heating element 13 so that the fourth heating part 132 is heated up quickly or significantly in a short time, so as to avoid a significant reduction in the amount of aerosol while the temperature of the first heating part 121 drops.

One embodiment of the present application further provides an aerosol generating system, comprising the aerosol generating device described in any of the above embodiments, and also comprising an aerosol generating article 2. The aerosol generating device has any of the above embodiments. The heater 1 described in the embodiment can use a control circuit to control the power supply 31 to provide power to the first heating element 12 and the second heating element 13, so that the first heating element 12 and the second heating element 13 both heat up at the same time or one heats up before the other. It is also possible to increase the temperature of the high temperature zone of the other side while the temperature of the high temperature zone of the first heating side decreases, and the temperatures of the high temperature zones of both sides can be equal at the same time.

The above-mentioned heater, aerosol generating device, aerosol generating system and control method, the heater includes a first heating element and a second heating element, the first heating element has a first heating part and a second heating part with different heating temperatures, the second heating element has a third heating part and a fourth heating part with different heating temperatures, and along the circumferential direction of the heater, at least part of the first heating element overlaps with the second heating element, so that the first heating element and the second heating element can interact with each other, which is beneficial to enable the heater to bake the aerosol generating product more fully and flexibly through flexible control of the two heating elements.

It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application, but are not limited to the embodiments described in the specification. Furthermore, it is possible for a person of ordinary skill in the art to make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to the present application.

Claims (21)

A heater, characterized by comprising: a first heating element for heating the aerosol generating article, wherein a portion of the first heating element constitutes a first heating portion and a portion of the first heating element constitutes a second heating portion, and a heating temperature of the first heating portion is greater than a heating temperature of the second heating portion; and a second heating element for heating the aerosol generating article, wherein a portion of the second heating element constitutes a third heating portion and a portion of the second heating element constitutes a fourth heating portion, and a heating temperature of the fourth heating portion is greater than a heating temperature of the third heating portion; Wherein, along the circumferential direction of the heater, at least a portion of the first heating element overlaps with the second heating element. The heater as described in claim 1 is characterized in that a heating cavity for accommodating at least a portion of the aerosol generating product is formed inside the heater, the heating cavity extends along the axial direction of the heater, and the first heating element and the second heating element are arranged around the heating cavity. The heater according to claim 1 is characterized in that a plurality of mesh holes are provided on the first heating element and the second heating element so that a grid pattern is formed on the first heating element and the second heating element. The heater according to claim 3, characterized in that the mesh includes a first mesh arranged at the first heating portion and the fourth heating portion, and a second mesh arranged at the second heating portion and the third heating portion; Wherein, the extension dimension of the first mesh along the axial direction of the heater is smaller than the extension dimension of the second mesh along the axial direction of the heater; and/or, the extension dimension of the first mesh along the circumferential direction of the heater is smaller than the extension dimension of the second mesh along the circumferential direction of the heater. The heater according to any one of claims 1 to 4, characterized in that along the axis of the heater In the longitudinal direction, the first heat generating portion is located above the second heat generating portion, and the third heat generating portion is located above the fourth heat generating portion. The heater according to any one of claims 1 to 4 is characterized in that, along the axial direction of the heater, the first heating portion and the fourth heating portion have at least partial non-overlapping; or the first heating portion and the fourth heating portion have no overlapping at all. The heater according to any one of claims 1 to 4 is characterized in that, along the axial direction of the heater, at least a portion of the third heat-generating portion overlaps with the first heat-generating portion, and at least a portion of the second heat-generating portion overlaps with the fourth heat-generating portion. The heater according to any one of claims 1 to 4 is characterized in that, along the axial direction of the heater, the length of the second heating part is greater than or equal to the length of the first heating part, and the length of the fourth heating part is greater than or equal to the length of the third heating part. The heater according to any one of claims 1 to 4, characterized in that Along the axial direction of the heater, the first heating element and the second heating element have the same length; or Along the axial direction of the heater, the upper end of the first heating element is flush with the upper end of the second heating element, and the lower end of the first heating element is flush with the lower end of the second heating element. The heater according to any one of claims 1 to 4, characterized in that there is a first temperature difference between the first heating portion and the second heating portion, and there is a second temperature difference between the fourth heating portion and the third heating portion; Wherein, the first temperature difference is between 100°C and 200°C, and/or the second temperature difference is between 100°C and 200°C. The heater according to claim 10, characterized in that the first temperature difference is equal to the first 2. Temperature difference. The heater according to any one of claims 1 to 4 is characterized in that the heater further comprises a heat-conducting element for contacting at least a portion of the aerosol-generating article, and the first heating element and the second heating element are arranged on the same side of the heat-conducting element. The heater according to claim 10, characterized in that The heat conducting element comprises metal, graphite or ceramic; or The thermal conductivity of the thermally conductive element is at least 350 W/(m·K). The heater according to any one of claims 1 to 4, characterized in that The heating temperature of the first heating portion is higher than the heating temperature of the third heating portion, and the heating temperature of the fourth heating portion is higher than the heating temperature of the second heating portion; or A heating temperature of the first heat generating portion is greater than or equal to a heating temperature of the fourth heat generating portion. A heater according to any one of claims 1 to 4, characterised in that the aerosol generating article comprises an aerosol-forming substrate segment for generating an aerosol; Along the axial direction of the heater, the length of the first heating element is greater than or equal to the length of the aerosol-forming substrate segment, and/or the length of the second heating element is greater than or equal to the length of the aerosol-forming substrate segment. The heater according to any one of claims 1 to 4 is characterized in that the first heating part and the second heating part are configured to generate heat simultaneously; and/or the third heating part and the fourth heating part are configured to generate heat simultaneously. The heater according to claim 16, characterized in that the first heating element also includes The first and second pins are arranged at intervals along the circumferential direction of the first heating element, so as to guide the current to pass through the first heating part and the second heating part of the first heating element at the same time in the circumferential direction; and/or The second heating element also includes a first pin and a second pin for supplying power to the second heating element; the first pin and the second pin are arranged at intervals along the circumferential direction of the second heating element to simultaneously guide current through the third heating part and the fourth heating part of the second heating element in the circumferential direction. An aerosol generating device, characterized in that it comprises the heater according to any one of claims 1 to 17, and also comprises a power supply and a control circuit; The control circuit controls the power supply to provide power to the first heating element and the second heating element, and after receiving a heating start instruction, controls the first heating element and the second heating element to heat up at the same time, or controls one of the first heating element and the second heating element to heat up before the other. An aerosol generating system, characterized in that it comprises the aerosol generating device and aerosol generating product as described in claim 18. A control method for an aerosol generating device, characterized in that the aerosol generating device comprises the heater according to any one of claims 1 to 17, and further comprises a power supply and a control circuit, wherein the first heating part and the fourth heating part are respectively arranged corresponding to different parts of the aerosol generating product; the method comprises: Controlling the power supply to provide power to the first heating element; After the first heating part reaches a preset temperature, or after the first heating element is powered for a second preset time, controlling the power supply to power the second heating element so as to increase the temperature of the second heating element; During the heating process of the second heating element, the power supply is controlled to reduce the power provided to the first heating element, or the power supply is controlled to stop providing power to the first heating element, so that the The temperature of the first heating part is reduced to be equal to the temperature of the fourth heating part. A control method for an aerosol generating device, characterized in that the aerosol generating device comprises the heater according to any one of claims 1 to 17, and further comprises a power supply and a control circuit; the first heating part and the fourth heating part are respectively arranged corresponding to different parts of the aerosol generating product; the method comprises: Controlling the power supply to provide power to the first heating element; controlling the power supply to provide initial power to the second heating element; After the first heating part reaches a preset temperature, or after the initial power is supplied to the second heating element for a first preset time, or after the power is supplied to the first heating element for a second preset time, controlling the power supply to supply the second heating element with power greater than the initial power, so that the second heating element is heated up significantly; When the second heating element is heated up significantly, the power supply is controlled to reduce the power provided to the first heating element, or the power supply is controlled to stop providing power to the first heating element, so that the first heating part is cooled to the same temperature as the fourth heating part.