EP4458188A1

EP4458188A1 - Heat-not-burn aerosol forming device and heating member thereof

Info

Publication number: EP4458188A1
Application number: EP22913797.1A
Authority: EP
Inventors: Yu Guo; Xiaoli Liu; Feng Liang
Original assignee: Shenzhen Merit Technology Co Ltd
Current assignee: Shenzhen Maishi Technology Co Ltd
Priority date: 2021-12-31
Filing date: 2022-11-04
Publication date: 2024-11-06
Also published as: CN114304749A; JP2025500528A; WO2023124534A1; EP4458188A4; CN114304749B

Abstract

A heating member (100) and a heat-not-burn aerosol forming device. The heating member (100) includes: a base (10) having an accommodating position (A) for accommodating an aerosol-generating substrate; and an electric heating film layer (20) arranged on the base (10) and including at least two heating regions (21). The base (10) further has a first end (a1) and a second end (a2) serving as two opposite ends thereof. The at least two heating regions (21) are arranged sequentially from the first end (a1) to the second end (a2). Among the at least two heating regions (21), a heating power per unit area of a heating region (21) located at the first end (a1) is the largest, so that a temperature of a radiation area located at the first end (a1) is the largest, and an infrared radiation power thereof is also the largest, and thus a temperature of the aerosol-generating substrate at the first end (a1) is the highest, thereby increasing an aerosol generation rate and improving a taste in early stages of heating.

Description

TECHNICAL FIELD

The present application relates to the field of atomization technology, and more specifically, to a heat-not-burn aerosol forming device and a heating member thereof.

BACKGROUND

Current aerosol forming devices heat aerosol-forming substrate usually by using heating members. The aerosol-forming substrate includes a substrate material that can generate aerosol when heated. Heating without burning is a heating method of the aerosol forming devices, and the aerosol-forming substrate generates aerosol by heating without burning.
However, the heat-not-burn aerosol forming device in the existing technology has a defect of slow aerosol formation rate, resulting in poor user experience. For example, in the early stages of the entire heating process, users hope that aerosol is formed quickly, but the existing aerosol forming device has the problem of slow heating.

SUMMARY

In view of this, this application discloses a heat-not-burn aerosol forming device and a heating member thereof.
A heating member includes:

a base having an accommodating space for accommodating aerosol-forming substrate; and
an electric heating film layer arranged on the base and including at least two heating regions.

The base further has a first end and a second end serving as two opposite ends thereof, the at least two heating regions are arranged sequentially from the first end to the second end, and among the at least two heating regions, a heating power per unit area of a heating region located at the first end is greater than heating powers per unit area of other heating regions.
In one of the embodiments, heating powers per unit area of the heating regions from the second end to the first end gradually increase.
In one of the embodiments, the at least two heating regions are connected in series with each other, and resistance values per unit area of the heating regions from the second end to the first end gradually increase.
In one of the embodiments, the at least two heating regions are connected in parallel with each other, and resistance values per unit area of the heating regions from the second end to the first end gradually decrease.
In one of the embodiments, the heating member further includes an infrared radiation film layer; and the infrared radiation film layer is arranged on the base, and includes at least two radiation regions heated by the at least two heating regions in one-to-one correspondence.
In one of the embodiments, the base is in a shape of a cylinder with a hollow cavity, and the hollow cavity is used as the accommodating space; the infrared radiation film layer is arranged on an inner wall of the base; the electric heating film layer is arranged on an outer wall of the base; and each heating region conducts heat to a corresponding radiation region thereof through the base therebetween.
In one of the embodiments, an insulating layer is arranged between the outer wall of the base and the electric heating film layer.
In one of the embodiments, the base is in a shape of a cylinder with a hollow cavity, and the hollow cavity is used as the accommodating space; the infrared radiation film layer is arranged on an outer wall of the base, and configured to heat the aerosol-forming substrate in the accommodating space through infrared radiation penetrating the base; the electric heating film layer is arranged on a surface of the infrared radiation film layer away from the base, and each heating region covers a corresponding radiation region thereof.
In one of the embodiments, the accommodating space is formed on a circumferential outer side of the base; the electric heating film layer is arranged on a circumferential outer wall of the base; the infrared radiation film layer is arranged on a side of the electric heating film layer away from the base; and each heating region covers a corresponding radiation region thereof.
In one of the embodiments, an insulating layer is arranged between the electric heating film layer and the base.
In one of the embodiments, the base has a first side and a second side away from the first side, the accommodating space is formed at the first side and at the second side of the base; and the electric heating film layer and the infrared radiation film layer are laminated on one of a surface of the first side and a surface of the second side in sequence in a direction from inside to outside, and the infrared radiation film layer is arranged on another of the surface of the first side and the surface of the second side; or the electric heating film layer and the infrared radiation film layer are laminated on a surface of the first side and on a surface of the second side respectively in sequence in a direction from inside to outside.
A heat-not-burn aerosol forming device, includes the heating member of any one of the above embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly describe the solutions in the embodiments of the present application or in the prior art, the accompanying drawings to be used in the description of the embodiments or the prior art will be described briefly. Obviously, the drawings described hereinafter are only some embodiments of the present application. For ordinary skilled persons in the art, other drawings can also be obtained based on the following drawings without creative work.

FIG. 1 is a schematic cross-sectional view of a heating member in an embodiment of the present invention;
FIG. 2 is a schematic structural view showing a base and an electric heating film layer of the heating member shown in FIG. 1;
FIG. 3 is an expanded view of the electric heating film layer shown in FIG. 2;
FIG. 4 is a schematic cross-sectional view of a heating member in another embodiment;
FIG. 5 is a schematic cross-sectional view of a heating member in another embodiment;
FIG. 6 is a schematic longitudinal-sectional view of a heating member in another embodiment;
FIG. 7 is a schematic cross-sectional view of the heating member shown in FIG. 6;
FIG. 8 is a schematic longitudinal-sectional view of the heating member in another embodiment;
FIG. 9 is a schematic cross-sectional view of the heating member shown in FIG. 8;
FIG. 10 is a schematic structural view of a heating body and an electric heating film layer in another embodiment;
FIG. 11 is a schematic longitudinal-sectional view of the heating member in another embodiment;
FIG. 12 is a schematic longitudinal-sectional view of the heating member in another embodiment.

DETAILED DESCRIPTION OF THE EMBODIMENTS

To make the objectives, features, and advantages of the present application more apparent and better understood, detailed explanations of specific embodiments are provided below with reference to accompanying drawings. Many specific details are disclosed in the following description to facilitate a comprehensive understanding of the present application. However, it should be noted that the present application can be implemented in various ways different from those described herein, and those skilled in the art may make similar improvements without departing from the contents of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.
In the description of the present application, it should be understood that the terms "central", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientations or positional relationships on the basis of the drawings. These terms are only for describing the present application and simplifying the description, rather than indicating or implying that the related devices or elements must have the specific orientations, or be constructed or operated in the specific orientations, and therefore cannot be understood as limitations of the present application.
In addition, the terms "first" and "second" are used for illustrative purposes only, and cannot be understood as indicating or implying relative importance, or implicitly indicating the quantity of the indicated elements. Therefore, the element modified by "first" or "second" may explicitly or implicitly includes at least one of the elements. In the description of the present application, "a plurality of' means at least two, such as two, three, etc., unless otherwise specifically defined.
In the present application, unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled", "fixed" and the like should be interpreted broadly. For example, an element may be fixedly connected, detachably connected, or integrated to the other element, may be mechanically connected, or electrically connected to the other element, may be directly connected to the other element or connected to the other element via an intermediate element, and may be an internal communication of two elements or an interaction relationship between two elements, unless otherwise specifically defined. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in the present application can be understood according to specific circumstances.
In the present application, unless otherwise specifically defined, an element, when being referred to as being located "on" or "under" another element, may be in direct contact with the other element or contact the other element via an intermediate element. Moreover, the element, when being referred to as being located "on", "above", "over" another element, may be located right above or obliquely above the other element, or merely located at a horizontal level higher than the other element; and the element, when being referred to as being located "under", "below", "beneath" another element, may be located right below or obliquely below the other element, or merely located at a horizontal level lower than the other element.
It should be noted that an element, when being referred to as being "fixed" or "attached" to another element, may be fixed or attached to the other element directly or via an intermediate element. An element, when referred to as being "connected" to another element, may be directly connected to the other element or via an intermediate element. Such terms as "vertical", "horizontal", "up", "down", "left", "right" and the like used herein are for illustrative purposes only and are not meant to be the only ways for implementing the present application.
Referring to FIG. 1, FIG. 2 and FIG. 3, an embodiment of the present invention provides a heat-not-burn aerosol forming device. The heat-not-burn aerosol forming device includes a heating member 100. The heating member 100 heats aerosol-forming substrate (not shown in the figures), so that the aerosol-forming substrate is heated and baked to volatilize corresponding components to generate an aerosol. A suction airflow is formed when a user sucks through the heat-not-burn aerosol forming device or the aerosol-forming substrate, and the generated aerosol flows into the user's mouth along with the suction airflow and is inhaled by the user.
The heating member 100 includes a base 10, an electric heating film layer 20 and an infrared radiation film layer 30. The base 10 has an accommodating space A for accommodating the aerosol-forming substrate and allowing the suction airflow to pass through. The electric heating film layer 20 is arranged on the base 10 and includes at least two heating regions 21. The infrared radiation film layer 30 is arranged on the base 10 and includes at least two radiation regions heated by at least two heating regions 21 in one-to-one correspondence. That is to say, the number of heating regions 21 is equal to the number of the radiation regions, and the heating regions 21 and the radiation regions correspond one to one. Each heating region 21 heats a corresponding radiation region, so that after heated, the corresponding radiation region sends out infrared radiation into the accommodating space A, thus radiatively heating a portion of the aerosol-forming substrate in the accommodating space A corresponding to the radiation region.
The base 10 also has a first end a1 and a second end a2 serving as two opposite ends thereof. The above-mentioned at least two heating regions 21 are arranged sequentially from the first end a1 to the second end a2. Among the at least two heating regions 21, the heating power per unit area of the heating region 21 located at the first end a1 is greater than the heating power per unit area of the other heating regions 21, such that the temperature of the radiation region located at the first end a1 is the highest when the electric heating film layer 20 is energized, and that the infrared radiation power located at the first end a1 is the largest, thus making the aerosol-forming substrate located at the first end a1 have the highest temperature, which is beneficial to increasing the aerosol generation rate while ensuring the aerosol-forming substrate to be sufficiently baked without a burnt smell, thereby increasing the aerosol generation rate, improving the taste in the early stages of heating (such as in the first two puffs), and improving the user's experience. It may be understood that, if the areas of the heating regions 21 are equal, then among the heating regions 21, the heating power of the heating region 21 located at the first end a1 is greater than any other heating power of the other heating region 21.
It should be noted that the first end a1 and the second end a2 in this disclosure are as follows: when the aerosol-forming substrate is being combined with the heating element (that is, when the aerosol-forming substrate is being combined into the accommodating space A of the base 10), one end of the base 10, which contacts the aerosol-forming substrate first, is the first end a1, and another end opposite to the first end a1 is the second end a2. It can be understood that, relative to a flowing direction B of the suction airflow generated when the user sucks, the suction airflow flows from the second end a2 to the first end a1. In other words, the flowing direction B of the suction airflow is from the second end a2 to the first end a1.
When the heat-not-burn aerosol forming device and the heating member 100 thereof are used, the user sucks, and the electric heating film layer 20 is energized at the same time, such that the heating regions 21 heat the corresponding radiation regions respectively, thereby stimulating each of the radiation regions to heat the aerosol-forming substrate in the accommodating space A through infrared radiation, making the aerosol-forming substrate to be heated and baked to generate aerosol. The generated aerosol flows from the second end a2 to the first end a1 along with the suction airflow, and is finally inhaled by the user. Among the heating regions 21, the heating region 21 located at the first end a1 has the largest heating power per unit area, therefore the temperature of the radiation region located at the first end a1 is the largest, and the infrared radiation power thereof is also the largest, thus making a portion of the aerosol-forming substrate located at the first end a1 have the highest temperature (that is, the position with the highest temperature is located at the portion of the aerosol-forming substrate located at the first end a1, that is, the position with the highest temperature is closer to the user), which is beneficial to increasing the aerosol generation rate while ensuring the aerosol-forming substrate to be sufficiently baked without a burnt smell, thereby improving the taste in the early stages of heating (such as in the first two puffs), and improving the user's experience.
It should be noted that the division of each radiation region of the infrared radiation film layer 30 is determined by each heating region 21. That is, a region roughly covered by an orthographic projection of a heating region 21 on the infrared radiation film layer 30 is a radiation region corresponding to the heating region 21. Of course, the orthographic projection of the heating region 21 on the infrared radiation film layer 30 is not limited to completely covering the corresponding radiation region, but may have an area greater or less than that of the corresponding radiation region, which is not limited herein, as long as the heat of the heating region 21 can be transferred to the corresponding radiation region to generate infrared radiation.
In order to ensure that each heating region 21 heats the corresponding radiation region, in an embodiment, the radiation region directly covers the corresponding heating region 21, and the heat generated when the heating region 21 is energized is directly conducted to the corresponding radiation region. In another embodiment, the radiation region does not directly cover the corresponding heating region 21, and the base 10 is arranged therebetween, and the heat generated when the heating region 21 is energized is indirectly conducted to the corresponding radiation region through the base 10. Since the heating regions 21 are arranged in sequence from the second end a2 to the first end a1 (i.e., along the flowing direction B of the suction airflow), the radiation regions are also arranged in sequence from the second end a2 to the first end a1 (i.e., along the flowing direction B of the suction airflow). Moreover, the heating power per unit area of the heating region 21 located at the first end a1 is the largest, therefore, when the electric heating film layer 20 is energized, the temperature of the radiation region located at the first end a1 is the highest, and the radiation power thereof is the largest, thus making the portion of the aerosol-forming substrate located at the first end a1 have the highest temperature.
It should also be noted that the infrared radiation film layer 30 is not necessary. In other embodiments, the base 10 is not provided with the infrared radiation film layer 30. In this case, the heat generated when the electric heating film layer 20 is energized is used to heat the aerosol-forming substrate in the accommodating space A directly. In this way, among the heating regions 21, since the heating region 21 located at the first end a1 has the largest heating power per unit area, the portion of the aerosol-forming substrate located at the first end a1 has the highest temperature (that is, the position with the highest temperature is located at a side of the aerosol-forming substrate closer to the user), which is beneficial to increasing the aerosol generation rate while ensuring the aerosol-forming substrate to be sufficiently baked without a burnt smell, thereby improving the taste in the early stages of heating, and improving the user's experience.
Optionally, the base 10 may be made of high-temperature-resistant material, such as quartz glass, mica, steel, or ceramics.
Optionally, the material of the infrared radiation film layer 30 may be at least one of high infrared emissivity materials, such as perovskite system, spinel system, carbide, silicide, nitride, oxide, and rare earth materials.
Specifically, in an embodiment, the heating powers per unit area of the heating regions 21 from the second end a2 to the first end a1 gradually increase, such that, when the electric heating film layer 20 is energized, the temperature of the heating region 21 located at the first end a1 is the highest, thus the temperature of the radiation region located at the first end a1 is the highest, and the infrared radiation power is also the largest, thereby making the portion of the aerosol-forming substrate located at the first end a1 have the highest temperature, which is beneficial to increasing the aerosol generation rate and improving the taste in the early stage of heating.
Further, the at least two heating regions 21 are connected in series with each other, and resistance values per unit area of the heating regions 21 from the second end a2 to the first end a1 gradually increase. In this way, since the heating regions 21 are connected in series, the heating power per unit area of each heating region 21 is proportional to the resistance value thereof. Therefore, the resistance values per unit area of the heating regions 21 from the second end a2 to the first end a1 gradually increase, thereby ensuring that the heating powers per unit area of the heating regions 21 from the second end a2 to the first end a1 gradually increase. It may be understood that, if the areas of the heating regions 21 are equal, the resistance values of the heating regions 21 from the second end a2 to the first end a1 gradually increase.
In another embodiment, the at least two heating regions 21 may also be connected in parallel with each other, and the resistance values per unit area of the heating regions 21 from the second end a2 to the first end a1 gradually decrease. In this way, since the heating regions 21 are connected in parallel with each other, the heating power per unit area of each heating region 21 is inversely proportional to the resistance value thereof. Therefore, the resistance values per unit area of the heating regions 21 from the second end a2 to the first end a1 are gradually decreased, thereby ensuring that the heating powers per unit area of the heating regions 21 from the second end a2 to the first end a1 gradually increases. It may be understood that, if the areas of the heating regions 21 are equal, the resistance values of the heating regions 21 from the second end a2 to the first end a1 gradually decrease.
Alternatively, the resistance value per unit area of each heating region 21 can be controlled by controlling a film thickness, a material type, or a material component ratio of each heating region 21, so that the resistance values per unit area of the heating regions 21 from the second end a2 to the first end a1 gradually increases or decreases. Optionally, the material of the heating film layer may be a coating material, such as silver-palladium alloy, silver, and glass mixture, or may be a nano-resistance heating film material, which is not limited herein, as long as it can generate heat after energized.
Specifically, in an embodiment, the heating member 100 also includes an electrode layer 50. The electrode layer 50 may be arranged on the base 10 and electrically connected to the electric heating film layer 20 to realize a series or parallel connection of the heating regions 21. In other embodiments, the electrode layer 50 may also be directly arranged on the electric heating film layer 20, which is not limited herein, as long as the series or parallel connection of the heating regions 21 can be realized. Optionally, the material of the electrode layer 50 may be a metal material with a high conductivity, such as silver, gold, copper, or any alloy containing gold or silver or copper.
Specifically, in the embodiment shown in FIGS. 2 and 3, the electric heating film layer 20 includes two heating regions 21. For convenience of description, an upper heating region 21 is named a first heating region, and a lower heating region 21 is named a second heating region. The suction airflow flows from bottom to top. That is, the first heating region is located at the first end a1, and the second heating region is located at the second end a2. The first heating region and the second heating region are connected in series with each other, and the resistance value per unit area of the first heating region is greater than the resistance value per unit area of the second heating region, such that after energization, the first heating region heats the corresponding radiation region more, and the temperature of the aerosol-forming substrate heated by the radiation of the radiation region corresponding to the first heating region is higher. Further, the electrode layer 50 is arranged at an end of the first heating region away from the second heating region (i.e., arranged at the first end a1 of the base 10) and arranged at an end of the second heating region away from the first heating region (i.e., arranged at the second end a2 of the base 10), and the first heating region and the second heating region are in electrical contact with each other to realize the series connection of the first heating region and the second heating region.
Referring to FIG. 1, in an embodiment of the present invention, the base 10 is in a shape of a cylinder with a hollow cavity, and the hollow cavity is used as the accommodating space A. The infrared radiation film layer 30 is arranged on the inner wall of the base 10, and the electric heating film layer 20 is arranged on the outer wall of the base 10, and each heating region 21 conducts heat to the corresponding radiation region through the base 10 therebetween, to heat the corresponding radiation region, thereby stimulating the corresponding radiation region to heat the aerosol-forming substrate through infrared radiation. In this way, during a usage, the aerosol-forming substrate is inserted into the hollow cavity of the base 10 (i.e., the accommodating space A), and then the user sucks while the electric heating film layer 20 is energized, so that each heating region 21 transfers heat to the corresponding radiation region through the base 10 therebetween, thereby stimulating the corresponding radiation region to heat the aerosol-forming substrate through infrared radiation, and making the heated and baked aerosol-forming substrate generate aerosol. The generated aerosol, along with the suction airflow, flows from the second end a2 of the base 10 to the first end a1 of the base 10, and is finally inhaled by the user.
Furthermore, an insulating layer 40 is arranged between the outer wall of the base 10 and the electric heating film layer 20, and the insulating layer 40 insulates the electric heating film layer 20 from the base 10. Optionally, a high-temperature-resistant insulating material coats the outer wall of the base 10 and cures to form the insulating layer 40. An electric heating film material coats the insulating layer 40 and cures to form the electric heating film layer 20. A conductive material coats the electric heating film layer 20 or the insulating layer 40 and cures to form the electrode layer 50. An infrared radiation film material coats the inner wall of the base 10 and cures to form the infrared radiation film layer 30.
Alternatively, the base 10 may be a hollow cylinder, and the hollow cavity formed therein is also cylindrical. In other embodiments, the base 10 may also be a hollow prism, and the hollow cavity formed therein is also prismatic. Of course, the base 10 may also be hollow and in any other shape, which is not limited herein.
It should be noted that in this embodiment, since the infrared radiation film layer 30 is arranged on the inner wall of the base 10, that is, the infrared radiation film layer 30 and the aerosol-forming substrate in the hollow cavity are not separated by the base 10. The base 10 can transfer the heat generated by the electric heating film layer 20 to the infrared radiation film layer 30. Therefore, the base 10 needs to be made of a material that are resistant to high temperatures and have good thermal conductivity, such as steel or ceramics, which are not limited herein. It should also be noted that the orthographic projection of each infrared radiation film layer 30 on the electric heating film layer 20 is not limited to completely covering the electric heating film layer 20, and may have an area greater or less than that of the electric heating film layer, which is not limited herein, as long as the heat generated by the electric heating film layer 20 can be transferred to the infrared radiation film layer 30 to generate infrared radiation.
Referring to FIG. 4, in another embodiment of the present invention, the base 10 is in the shape of a cylinder with a hollow cavity, and the hollow cavity is used as the accommodating space A. The infrared radiation film layer 30 is arranged on the outer wall of the base 10, and configured to heat the aerosol-forming substrate in the accommodating space A through infrared radiation penetrating the base 10. The electric heating film layer 20 is arranged on a surface of the infrared radiation film layer 30 away from the base 10, and each heating region 21 covers a corresponding radiation region thereof. In this way, during a usage, the aerosol-forming substrate is inserted into the hollow cavity of the base 10 (i.e., the accommodating space A), and then the user sucks, and at the same time, the electric heating film layer 20 is energized, such that each heating region 21 directly transfers the heat to the corresponding radiation region, thereby stimulating the corresponding radiation region to heat the aerosol-forming substrate through the infrared radiation penetrating the base 10, so that the aerosol-forming substrate is heated and baked to generate aerosol. The generated aerosol, along with the suction airflow, flows from the second end a2 of the base 10 to the first end a1 of the base 10, and is finally inhaled by the user.
It should be noted that in this embodiment, the electric heating film layer 20 directly covers the infrared radiation film layer 30, so that the heat generated when the electric heating film layer 20 is energized is directly transferred to the infrared radiation film layer 30, thereby heating the infrared radiation film layer 30. Since the infrared radiation film layer 30 and the aerosol-forming substrate in the hollow cavity are separated by the base 10, infrared rays sent out by the infrared radiation film layer 30 need to penetrate the base 10 to radiatively heat the aerosol-forming substrate. Optionally, the base 10 can be made of a transparent material, such as quartz glass or mica, so that the infrared rays radiated by the infrared radiation film layer 30 can penetrate the transparent base 10, thereby radiatively heating the aerosol-forming substrate in the hollow cavity.
Referring to FIG. 5, further, if the infrared radiation film layer 30 is a conductive material, the insulating layer 40 is also arranged between the infrared radiation film layer 30 and the electric heating film layer 20. The insulating layer 40 is configured to insulate the infrared radiation film layer 30 from the electric heating film layer 20. Optionally, an infrared radiation film material coats the outer wall of the base 10 and cures to form the infrared radiation film layer 30. A high-temperature-resistant insulating material coats the infrared radiation film layer 30 and cures to form the insulating layer 40. An electric heating film material coats the insulating layer 40 and cures to form the electric heating film layer 20. A conductive material coats the electric heating film layer 20 or the insulating layer 40, and cures to form the electrode layer 50.
It should be noted that the insulating layer 40 is not necessary. When the infrared radiation film layer 30 itself is insulated, the insulating layer 40 is not needed, and the electric heating film layer 20 is directly formed on the infrared radiation film layer 30. Only when the infrared radiation film layer 30 itself is not insulated, does the insulating layer 40 need to be arranged between the infrared radiation film layer 30 and the electric heating film layer 20 for insulation.
Referring to FIGS. 6 and 7, in another embodiment of the present invention, an accommodating space A is formed around a circumferential outer side of the heating element. That is, the accommodating space A is formed around the base 10 along a circumferential direction of the base 10 (i.e., the base 10 is pin-shaped and inserted into the aerosol-forming substrate). The electric heating film layer 20 is arranged on a circumferential outer wall of the base 10, the infrared radiation film layer 30 is arranged on a side of the electric heating film layer 20 away from the base 10, and each heating region 21 covers a corresponding radiation region thereof. In this way, during a usage, the base 10 is inserted into the aerosol-forming substrate so that the aerosol-forming substrate is located on the circumferential outer side of the base 10. Then the user sucks and the electric heating film layer 20 is energized at the same time, such that the heating regions 21 transfer heat to the corresponding radiation regions respectively, thereby stimulating each of the radiation regions of the infrared radiation film layer 30 to heat the aerosol-forming substrate through infrared radiation, making the aerosol-forming substrate to be heated and baked to generate aerosol. The generated aerosol flows from the second end a2 of the base 10 to the first end a1 of the base 10 along with the suction airflow, and is finally inhaled by the user.
Referring to FIGS. 8 and 9, further, the insulating layer 40 is arranged between the electric heating film layer 20 and the base 10. The insulating layer 40 is configured to insulate the electric heating film layer 20 from the base 10. Optionally, the outer wall of the base 10 is coated with a high-temperature-resistant insulating material, which cures to form the insulating layer 40. The insulating layer 40 is coated with an electric heating film material, which cures to form the electric heating film layer 20. An infrared radiation film material coats the electric heating film layer 20, and cures to form the infrared radiation film layer 30.
It should be noted that the insulating layer 40 is not necessary. When the base 10 itself is insulated, the insulating layer 40 is not needed, and the electric heating film layer 20 can be directly formed on the base 10. Only when the base 10 itself is not insulated, does the insulating layer 40 need to be arranged between the base 10 and the electric heating film layer 20.
Optionally, a protective layer 60 may be formed on the infrared radiation film layer 30 to protect the infrared radiation film layer 30. The protective layer 60 may be, for example, a glaze layer, etc., which is not limited herein, as long as it can provide a protection while also being able to withstand high temperatures and allowing infrared radiation sent out from the infrared radiation film layer 30 to pass through.
Referring to FIG. 10, optionally, the electric heating film layer 20 may have a U-shaped structure, and an open end 22 of the U-shaped structure is located at the second end a2 of the base 10, and a closed end 23 of the U-shaped structure is located at the first end a1 of the base 10. The electric heating film layer 20 includes the first heating region located at the closed end 23 of the U-shaped structure, and the second heating region located at the open end 22 of the U-shaped structure. The electrode layer 50 is electrically connected to two terminals of the open end 22 of the U-shaped structure, thereby realizing a series connection of the first heating region and the second heating region. In other embodiments, the electric heating film layer 20 may also have any other shape, such as a shape covering the entire peripheral surface of the base 10, which is not limited herein.
Referring to FIG. 11, in another embodiment of the present invention, the base 10 has a first side 11 and a second side 12 away from the first side 11. More specifically, the base 10 is in a shape of a sheet, and the first side 11 and the second side 12 are two side surfaces of the sheet-shaped base 10. The accommodating space A is formed at the first side 11 and at the second side 12 of the base 10, and the electric heating film layer 20 and the infrared radiation film layer 30 are laminated on one of a surface of the first side 11 and a surface of the second side 12 in sequence in a direction from the inside to the outside, and the infrared radiation film layer 30 is arranged on the other of the surface of the first side 11 and the surface of the second side 12.
More specifically, the electric heating film layer 20 is arranged on the surface of the first side 11 of the base 10, and the infrared radiation film layer 30 includes a first sub-infrared radiation film layer 30a arranged on the electric heating film layer 20, and a second sub-infrared radiation film layer 30b arranged on the surface of the second side of 12 of the base 10. Each radiation region includes the first sub-radiation region located at the first sub-infrared radiation film layer 30a and the second sub-radiation region located at the second sub-infrared radiation film layer. The first sub-radiation region covers the corresponding heating region 21, and the second sub-radiation region and the corresponding heating region 21 conduct heat through the base 10 therebetween.
In this way, during a usage, the base 10 is inserted into the aerosol-forming substrate, so that the aerosol-forming substrate is located on the first side 11 and the second side 12 of the base 10. Then the user sucks while the electric heating film layer 20 is energized, and the heat generated by the electric heating film layer 20 is directly transferred to the first sub-infrared radiation film layer 30a, thereby stimulating the first sub-infrared radiation film layer 30a to heat the aerosol-forming substrate located on the first side 11 of the base 10 through infrared radiation. At the same time, the heat generated by the electric heating film layer 20 is transferred from the first side 11 of the base 10 to the second side 12 of the base 10, thereby heating the second sub-infrared radiation film layer 30b formed on the surface of the second side 12 of the base 10, and stimulating the second sub-infrared radiation film layer 30b to heat the aerosol-forming substrate located on the second side 12 of the base 10 through infrared radiation.
Referring to FIG. 12, further, the insulating layer 40 may be arranged on the surfaces of the first side 11 and second side 12 of the base 10, and the insulating layer 40 is configured to insulate the base 10 from other layers. The insulating layer 40 is not necessary, and when the base 10 itself is insulated, the insulating layer 40 may not be arranged.
It should be noted that the electric heating film layer 20 is not limited to being arranged only on the surface of the first side 11of the base 10. In other embodiments, the electric heating film layer 20 and the infrared radiation film layer 30 may also be laminated on the surfaces of the first side 11 and second side 12 of the base 10 respectively in sequence from inside to outside.
More specifically, the electric heating film layer 20 includes a first sub-electric heating film layer arranged on the surface of the first side 11 and a second sub-electric heating film layer arranged on the surface of the second side 12. The infrared radiation film layer 30 includes the first sub-infrared radiation film layer 30a arranged on the first sub-electric heating film layer 20 and the second sub-infrared radiation film layer 30b arranged on the second sub-electric heating film layer 20. Each heating region 21 includes the first-sub heating region located at the first sub-electric heating film layer and the second-sub heating region located at the second sub-electric heating film layer, and orthographic projections of the first-sub heating region and second-sub heating region of each heating region on a plane, where the base 10 is located, roughly coincide. The first sub-infrared radiation region of each infrared radiation region covers the first-sub heating region of the corresponding heating region 21 thereof, and the second sub-infrared radiation region of each infrared radiation region roughly covers the second-sub heating region of the corresponding heating region 21 thereof. That is to say, when the electric heating film layer 20 is energized, the first sub-infrared radiation film layer 30a is heated by the first sub-electric heating film layer, so that the first sub-infrared radiation film layer 30a heats the aerosol-forming substrate located on the first side 11 of the base 10 through infrared radiation. At the same time, the second sub-electric heating film layer heats the second sub-infrared radiation film layer 30b, so that the second sub-infrared radiation film layer 30b heats the aerosol-forming substrate located on the second side 12 of the base 10 through infrared radiation, and that the aerosol-forming substrate located on the first side 11 and second side 12 of the base 10 can be heated and baked evenly.
The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features are described in the embodiments. However, as long as there is no contradiction in the combination of these technical features, the combinations should be considered as in the scope of the present application.
The above-described embodiments are only several implementations of the present application, and the descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present application. It should be understood by those of ordinary skill in the art that various modifications and improvements can be made without departing from the concept of the present application, and all fall within the protection scope of the present application. Therefore, the patent protection of the present application shall be defined by the appended claims.

Claims

A heating member, characterized by comprising:
a base (10) having an accommodating space (A) for accommodating aerosol-forming substrate; and

an electric heating film layer (20) arranged on the base (10) and comprising at least two heating regions (21);

wherein the base (10) further has a first end (a1) and a second end (a2) serving as two opposite ends thereof, the at least two heating regions (21) are arranged sequentially from the first end (a1) to the second end (a2), and among the at least two heating regions (21), a heating power per unit area of a heating region (21) located at the first end (a1) is greater than heating powers per unit area of other heating regions (21).
The heating member according to claim 1, wherein heating powers per unit area of the heating regions (21) from the second end (a2) to the first end (a1) gradually increase.
The heating member according to claim 2, wherein the at least two heating regions (21) are connected in series with each other, and
resistance values per unit area of the heating regions (21) from the second end (a2) to the first end (a1) gradually increase.
The heating member according to claim 2, wherein the at least two heating regions (21) are connected in parallel with each other, and
resistance values per unit area of the heating regions (21) from the second end (a2) to the first end (a1) gradually decrease.
The heating member according to any one of claims 1 to 4, wherein the heating member further comprises an infrared radiation film layer (30); and the infrared radiation film layer (30) is arranged on the base (10), and comprises at least two radiation regions heated by the at least two heating regions (21) in one-to-one correspondence.
The heating member according to claim 5, wherein the base (10) is in a shape of a cylinder with a hollow cavity, and the hollow cavity is used as the accommodating space (A);
the infrared radiation film layer (30) is arranged on the inner wall of the base (10); the electric heating film layer (20) is arranged on the outer wall of the base (10); and each heating region (21) conducts heat to a corresponding radiation region thereof through the base (10) therebetween.
The heating member according to claim 6, wherein an insulating layer (40) is arranged between the outer wall of the base (10) and the electric heating film layer (20).
The heating member according to claim 5, wherein the base (10) is in a shape of a cylinder with a hollow cavity, and the hollow cavity is used as the accommodating space (A);
the infrared radiation film layer (30) is arranged on an outer wall of the base (10), and configured to heat the aerosol-forming substrate in the accommodating space (A) through infrared radiation penetrating the base (10); the electric heating film layer (20) is arranged on a surface of the infrared radiation film layer (30) away from the base (10), and each heating region (21) covers a corresponding radiation region thereof.
The heating member according to claim 5, wherein the accommodating space (A) is formed on a circumferential outer side of the base (10); the electric heating film layer (20) is arranged on a circumferential outer wall of the base (10); the infrared radiation film layer (30) is arranged on a side of the electric heating film layer (20) away from the base (10); and each heating region (21) covers a corresponding radiation region thereof.
The heating member according to claim 9, wherein an insulating layer (40) is arranged between the electric heating film layer (20) and the base (10).
The heating member according to claim 5, wherein the base (10) has a first side (11) and a second side (12) away from the first side (11), the accommodating space (A) is formed at the first side (11) and at the second side (12) of the base (10); and
the electric heating film layer (20) and the infrared radiation film layer (30) are laminated on one of a surface of the first side (11) and a surface of the second side (12) in sequence in a direction from inside to outside, and the infrared radiation film layer (30) is arranged on the other of the surface of the first side (11) and the surface of the second side (12); or

the electric heating film layer (20) and the infrared radiation film layer (30) are laminated on a surface of the first side (11) and on a surface of the second side (12) respectively in sequence in a direction from inside to outside.
A heat-not-burn aerosol forming device, characterized by comprising the heating member (100) according to any one of claims 1 to 11.