Heating body and aerosol product

Abstract

The embodiment of the invention provides a heating element and an aerosol product, the heating element is used for heating an aerosol generating substrate to generate aerosol, the heating element comprises a metal composite unit with a breathable gap, the metal composite unit comprises a framework material and a metal material, the metal material and the framework material are mutually combined, and the breathable gap is formed between the framework material and the metal material. The metallic material is used to generate an oxidative exothermic reaction to generate heat for heating the aerosol-generating substrate. The heating body provided by the embodiment of the invention does not generate harmful waste gas, the framework material does not generate an exothermic reaction or the generated heat is far less than the heat generated by the oxidation exothermic reaction of the metal material through the mutual combination of the metal material and the framework material, so that the oxidation speed of the metal material can be controlled, and the service life of the metal material is prolonged. The heating body can obtain the proper temperature to atomize the aerosol generating substrate, the aerosol quality is guaranteed, and the use experience of a user is improved.

Description

Technical Field

[0001] The present application relates to the field of atomization technology, and in particular to a heating element and an aerosol product. Background Art

[0002] In the related art, the heating element uses charcoal as a heat source to heat the aerosol generating matrix to generate aerosol, but charcoal is prone to produce harmful exhaust gas during the combustion process, which affects the user's health and usage experience. Summary of the invention

[0003] In view of this, the embodiments of the present application hope to provide a heating element and an aerosol product, which use metal materials as heat sources, do not generate harmful exhaust gas, and the heating temperature of the heating element can meet the heating requirements, so that the user experience is good.

[0004] To achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0005] The embodiment of the present application provides a heating element for heating an aerosol generating medium to generate an aerosol, and the heating element comprises:

[0006] A metal composite unit with air-permeable gaps, the metal composite unit comprising a skeleton material and a metal material capable of undergoing an oxidative exothermic reaction, the metal material and the skeleton material being combined with each other, the metal material being used to undergo an oxidative exothermic reaction to generate heat for heating an aerosol generating medium.

[0007] In some embodiments, the metal material is selected from at least one of iron, aluminum, and magnesium; and / or the skeleton material includes at least one of carbon fiber, quartz fiber, porous ceramic, and porous metal oxide.

[0008] In some embodiments, the metal material is in a granular form with a maximum dimension not exceeding 0.1 mm; or, the metal material is in a wire form with an equivalent diameter not exceeding 0.1 mm.

[0009] In some embodiments, when the metal material undergoes an exothermic oxidation reaction, the surface temperature of the metal composite unit is between 200°C and 400°C.

[0010] In some embodiments, the metal composite unit is in a membrane-like structure, which is made of a mixture of fibers, metal particles and a solvent medium, wherein the skeleton material includes the fibers and the metal material includes the metal particles.

[0011] In some embodiments, the metal composite unit is constructed as a porous filling structure, the skeleton material is a porous structure, the metal material is metal particles, and the metal particles are filled in the pores of the porous structure; or,

[0012] The metal composite unit is constructed as a continuous phase structure formed by mixing and sintering metal particles and the granular skeleton material.

[0013] In some embodiments, the metal composite unit further includes at least two layers of breathable membranes, the skeleton material is in a multi-layer grid structure and is disposed between two layers of the breathable membranes, and the metal material is metal particles and is filled in the multi-layer grid structure.

[0014] In some embodiments, the framework material is carbon nanotubes, and the metal material is metal particles deposited on the carbon nanotubes.

[0015] In some embodiments, the heat generating element comprises a fiber layer.

[0016] The metal composite unit is in a layered structure, the fiber layer and the metal composite unit are stacked and wound to form a core-shaped heating element; the fiber layer is arranged on the outside of the metal composite unit along the winding direction;

[0017] or,

[0018] The heating element comprises a fiber layer, the metal composite unit is in a solid columnar structure or a hollow columnar structure, and the fiber layer is wrapped around the metal composite unit.

[0019] The present application provides an aerosol product, including:

[0020] an aerosol generating medium section;

[0021] And the heating element described in any embodiment of the present application, wherein the heating element is used to heat the aerosol generating medium segment.

[0022] The heating element provided in the embodiment of the present application adopts metal material as a heat source to heat and atomize the aerosol generating matrix, and no harmful waste gas is generated. Through the mutual combination of the metal material and the skeleton material, the skeleton material does not undergo an exothermic reaction or the heat generated is much smaller than the heat generated by the exothermic oxidation reaction of the metal material. In this way, the oxidation rate of the metal material can be controlled, so that the heating element can obtain a suitable temperature to atomize the aerosol generating matrix, thereby ensuring the quality of the aerosol and enhancing the user experience. In addition, the interior of the metal material can also be in contact with the airflow, which enables the heating element to have a faster heating rate while the oxidation reaction of various parts of the metal material is uniform and the atomization reliability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of a heating element according to an embodiment of the present application;

[0024] Figure 2 This is a schematic structural diagram of a heating element according to another embodiment of the present application;

[0025] Figure 3 This is a schematic structural diagram of a heating element according to another embodiment of the present application;

[0026] Figure 4 This is a schematic structural diagram of an aerosol product according to an embodiment of the present application;

[0027] Figure 5 This is a schematic structural diagram of an aerosol product according to another embodiment of the present application;

[0028] Figure 6 This is a schematic structural diagram of an aerosol product according to yet another embodiment of the present application;

[0029] Figure 7 A schematic diagram of the structure of a metal composite unit according to an embodiment of the present application;

[0030] Figure 8 FIG. 1 is a schematic diagram of the structure of a metal composite unit according to another embodiment of the present application.

[0031] Description of Reference Numerals

[0032] 1-heating element; 10-metal composite unit; 11-fiber layer;

[0033] 2-Aerosol generating matrix segment. DETAILED DESCRIPTION

[0034] In the description of the embodiments of the present application, it should be noted that the terms "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0035] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, the meaning of "plurality" refers to two or more.

[0036] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The embodiment of the present application provides a heating element 1 for heating an aerosol generating substrate to generate an aerosol.

[0038] The aerosol generating matrix includes but is not limited to medicines, nicotine-containing materials or nicotine-free materials. The aerosol generating matrix can be a solid raw material with plants as the main raw material, such as tobacco, and added with corresponding aerosol formers and aroma materials.

[0039] The heating element 1 comprises a metal composite unit 10 having air-permeable gaps, wherein the metal composite unit 10 comprises a skeleton material and a metal material capable of undergoing an oxidative exothermic reaction.

[0040] The metal material and the skeleton material are combined with each other, and the metal material is used to generate heat for heating the aerosol generating substrate by an oxidative exothermic reaction.

[0041] That is to say, the metal composite unit 10 allows air to pass through. Specifically, the skeleton material has air-permeable gaps and is used to carry the metal material. The metal material is arranged on the skeleton material. When the metal material needs to undergo an exothermic oxidation reaction, the air flow contacts the metal material through the air-permeable gaps of the skeleton material. The metal material can release heat during the oxidation process. The heat flows out of the metal composite unit 10 through the air-permeable gaps, thereby heating and atomizing the aerosol generating matrix to generate an aerosol for the user to use.

[0042] It should be noted that the skeleton material is a material with air-permeable voids and temperature resistance. The air-permeable voids can be micropores in a microscopic sense, that is, they cannot be captured by the naked eye, or they can be voids in a macroscopic sense, that is, they can be captured by the naked eye. The skeleton material can be used as a carrier of metal materials and combined with the metal materials. The skeleton material carries the metal materials. When the metal materials undergo an oxidative exothermic reaction, the airflow can pass through the air-permeable voids and contact the metal materials carried on the skeleton material. In other words, the skeleton material can allow the airflow to pass through and contact the metal materials while carrying the metal materials. The airflow can also pass into the interior of the metal materials, thereby making the oxidative exothermic reaction in various parts of the metal materials uniform.

[0043] It can be understood that the metal material is supported on the skeleton material. During the design or manufacturing stage, the oxidation reaction rate of the metal material can be adjusted by controlling the size of the air-permeable gap, so that the exothermic oxidation reaction rate of the metal material is neither too fast nor too slow, thereby making the heating temperature obtained by the heating element 1 more suitable.

[0044] Of course, the rate of the oxidation reaction of the metal material can also be adjusted by adjusting the size of the metal material. For example, when the metal material is granular, the rate of the oxidation reaction of the metal material can be adjusted by adjusting the particle diameter of the metal material so that the heating temperature of the heating element 1 is more appropriate.

[0045] In the embodiment of the present application, the exothermic oxidation reaction of the metal material refers to: the metal material undergoes an oxidation reaction with oxygen to generate metal oxide and release heat.

[0046] In an embodiment of the present application, under the same conditions, when the metal material undergoes an exothermic oxidation reaction, the skeleton material does not undergo an exothermic oxidation reaction, or, even if an exothermic oxidation reaction occurs, the heat released by its chemical equation is much smaller than the heat corresponding to the chemical equation of the exothermic oxidation reaction of the metal material, for example, not exceeding 1 / 10 of the heat corresponding to the chemical equation of the exothermic oxidation reaction of the metal material.

[0047] The method for starting the oxidation exothermic reaction is not limited. For example, the oxidation exothermic reaction of the metal material can be started by open flame heating, resistance heating, electromagnetic heating, laser heating, microwave heating, friction heat release, etc., so as to heat and atomize the aerosol-generating matrix. It should be noted that once the oxidation exothermic reaction of the metal material is started, there is no need for continuous external heat input, and the chemical reaction between the metal material and oxygen can continue.

[0048] In the related art, the heating element uses charcoal as a heat source to heat the aerosol generating matrix to generate aerosol, but charcoal is prone to produce harmful exhaust gas during the combustion process, which affects the user's health and usage experience.

[0049] The heating element 1 provided in the embodiment of the present application adopts metal material as a heat source to heat and atomize the aerosol generating matrix, and no harmful waste gas is generated. Through the mutual combination of the metal material and the skeleton material, the skeleton material does not undergo an exothermic reaction or the heat generated is much smaller than the heat generated by the exothermic oxidation reaction of the metal material. In this way, the oxidation rate of the metal material can be controlled, so that the heating element 1 can obtain a suitable temperature to atomize the aerosol generating matrix, thereby ensuring the quality of the aerosol and increasing the user experience. In addition, the interior of the metal material can also be in contact with the airflow, which enables the heating element 1 to have a faster heating rate while the oxidation reaction of various parts of the metal material is uniform and the atomization reliability is high.

[0050] In some embodiments, the metal material is selected from at least one of iron, aluminum, and magnesium.

[0051] The metal material may be a single metal.

[0052] For example, the metal material can be metallic iron composed only of iron elements, which has good thermal conductivity. When the exothermic oxidation reaction of iron is initiated by an open flame or other means, iron reacts with oxygen to generate ferroferric oxide and releases a large amount of heat, so that the heating element 1 can quickly rise to the temperature required for the atomized aerosol generation matrix, and the atomization waiting time is short.

[0053] Alternatively, the metal material may be metallic aluminum consisting only of aluminum elements, which is light in weight, has strong thermal conductivity, and oxidizes faster. When the exothermic oxidation reaction of aluminum is initiated by an open flame or other means, aluminum reacts with oxygen to generate aluminum oxide and generates a large amount of heat.

[0054] Alternatively, the metal material may be metallic magnesium consisting only of magnesium elements, which has good heat dissipation performance. When the exothermic oxidation reaction of magnesium is initiated by an open flame or other means, magnesium reacts with oxygen to generate magnesium oxide and generate a large amount of heat.

[0055] Of course, the metal material can also be an alloy material. For example, the metal material can be a material composed of iron and aluminum. When an open flame or other method is used to start the oxidation reaction of the metal material, the iron-aluminum alloy reacts with oxygen, which can generate sufficient heat while preventing the oxidation rate of the metal material from being too fast, so that the temperature of the heating element 1 is more suitable.

[0056] The shape of the metal material is not limited.

[0057] In some embodiments, the metal material is in granular form and has a maximum size not exceeding 0.1 mm. Thus, when the metal material undergoes an oxidative exothermic reaction, the granular metal material can have a larger contact area with the airflow. Furthermore, the setting of the maximum size of the granular metal material can also increase the oxidation exothermic rate of the metal material, thereby increasing the heating rate of the heating element 1.

[0058] In other embodiments, the metal material is in the form of a wire, and the equivalent diameter does not exceed 0.1 mm.

[0059] It should be noted that the equivalent diameter is: the diameter of a circle having the same cross-sectional area as the wire.

[0060] In this embodiment, the wire-shaped metal material is easy to combine with the skeleton material. For example, the wire-shaped metal material and the skeleton material can be combined together by weaving. The wire-shaped metal material can also have a sufficient contact area with the airflow, thereby increasing the oxidation heat release rate, increasing the heating rate of the heating element 1, and then increasing the atomization rate.

[0061] In some embodiments, the skeleton material includes at least one of carbon fiber, quartz fiber, porous ceramic, and porous metal oxide.

[0062] The skeleton material may include only one of carbon fiber, quartz fiber, porous ceramic, and porous metal oxide; for example, in some embodiments, the skeleton material includes carbon fiber, which is resistant to high temperatures, has a small thermal expansion coefficient, good thermal conductivity, and high strength. When combined with a metal material, it can enhance the oxidation heat release effect of the metal material while also enabling the metal composite unit 10 to have a higher strength. In other embodiments, the skeleton material includes porous ceramic, which is a ceramic with a certain porosity and surface area, resistant to high temperatures, and high strength. When combined with a metal material, it is convenient for airflow to enter and react with the metal material to generate oxidation heat release. At the same time, it is also convenient for heat to be released from the surface of the metal composite unit 10, thereby enhancing the heating rate of the heating element 1.

[0063] Of course, the skeleton material may also include at least two of carbon fiber, quartz fiber, porous ceramics, and porous metal oxide.

[0064] In some embodiments, when the metal material undergoes an exothermic oxidation reaction, the surface temperature of the metal composite unit 10 is between 200°C and 400°C, for example, 200°C, 230°C, 250°C, 272°C, 290°C, 300°C, 305°C, 360°C, 380°C, 400°C, etc.

[0065] The surface temperature of the metal composite unit 10 is between 200°C and 400°C. On the one hand, it can enable the aerosol generating matrix to fully release effective substances when heated, thereby improving the quality of the aerosol and reducing the probability of incomplete heating of the aerosol generating matrix due to the low heating temperature of the heating element 1, thereby affecting the quality of the aerosol and increasing the user experience.

[0066] It is understandable that the speed of the exothermic oxidation reaction of the metal material can be controlled by the molding process and molding structure of the metal composite unit 10, so that the surface temperature of the metal composite unit 10 is between 200°C and 400°C.

[0067] The forming process of the metal composite unit 10 is not limited.

[0068] In some embodiments, the metal composite unit 10 is a membrane structure, which is made of a mixture of fibers, metal particles and a solvent medium, wherein the skeleton material includes fibers and the metal material includes metal particles.

[0069] Specifically, in this embodiment, the fibers and metal particles can be first mixed in a certain proportion, then evenly dispersed through a solvent medium, and then formed into a film and the film thickness can be controlled through a filtration process, and finally a membrane structure is obtained through heat treatment, i.e., the metal composite unit 10 in this embodiment.

[0070] It can be understood that the solvent medium is a liquid that can dissolve fibers and metal particles. The solvent medium, fibers, and metal particles are mixed to form a solution. The liquid in the solution is extracted by filtration, and the solid is retained to form a membrane. Finally, the membrane is further processed by heat treatment, such as heating, insulation, and cooling, to obtain a membrane structure.

[0071] In this embodiment, the skeleton material may be quartz fiber, and the metal material may be other metal elements such as metal iron or metal magnesium.

[0072] In this embodiment, the skeleton material and the metal material are combined together by mixing, filtering and heat treatment, so that the arrangement of the metal material in the metal composite unit 10 can be more uniform, which is convenient for the uniform heat release of the metal material and the uniform temperature of the heating element 1, so as to improve the quality of the aerosol. The metal composite unit 10 is formed into a membrane structure, which is convenient for reducing the overall weight of the heating element 1. At the same time, it can also make the heating element 1 have sufficient strength and facilitate the installation of the heating element 1. In addition, the membrane structure can also help to regulate the heat transfer speed, reduce the probability of excessive heat loss affecting the oxidation reaction process of the metal material, and improve the working reliability of the heating element 1.

[0073] In some embodiments, the metal composite unit 10 is constructed as a porous filling structure, the skeleton material is a porous structure, the metal material is metal particles, and the metal particles are filled in the pores in the porous structure.

[0074] Specifically, the porous structure is a structure with a certain porosity and surface area, and the porous structure can be prepared by an electrolytic process, and then the metal particles are filled into the porous structure, such as Figure 7 As shown in (a) and (b), the pore size of the porous structure is reduced by mechanical action, such as compression, to fix the metal particles in the porous structure to obtain a porous filling structure, namely the metal composite unit 10 in this embodiment.

[0075] It is understandable that the porous structure can be a porous ceramic structure or a porous metal oxide structure or other materials with porosity and stability, and the metal particles can be other metal elements such as metallic iron or metallic magnesium.

[0076] The porous structure may be in a honeycomb shape or other shapes, which are not limited herein.

[0077] In this embodiment, metal particles are filled and fixed in a porous structure to achieve mutual bonding between the metal material and the skeleton material. When the metal material undergoes an oxidative exothermic reaction, the airflow can pass through the pores of the skeleton material to fully contact the metal material. The heat generated by the metal material can also be released more quickly through the skeleton material, thereby increasing the heating rate of the heating element 1.

[0078] In some embodiments, the metal composite unit 10 is constructed as a continuous phase structure formed by mixing and sintering metal particles and a granular skeleton material.

[0079] Specifically, the metal particles and the granular skeleton material can be polymerized and mixed to form a uniform mixture, such as Figure 8 As shown in (a), the mixture is then injected into a mold, formed by pressure or other means, and finally sintered to form a continuous phase structure, such as Figure 8 As shown in (b), it is the metal composite unit 10 in this embodiment.

[0080] It is understandable that the continuous phase structure refers to the mutual diffusion of metal particles and granular skeleton materials under the high temperature of sintering and the gradual formation of a continuous solid structure.

[0081] In this embodiment, the skeleton material can be a material with bonding properties and air permeability, which is resistant to high temperatures. The metal material can be bonded to the skeleton material to achieve a mixture of the metal material and the skeleton material. The metal particles can be metal elements such as metal iron or metal aluminum.

[0082] In this embodiment, when the metal material undergoes an oxidative exothermic reaction, the metal material can also be relatively stably fixed on the skeleton material. The metal composite unit 10 has a strong structural stability, which facilitates the installation of the heating element 1.

[0083] In some embodiments, the metal composite unit 10 further includes at least two layers of breathable membranes, the skeleton material is in a multi-layer grid structure and is disposed between the two layers of breathable membranes, and the metal material is metal particles and is filled in the multi-layer grid structure.

[0084] Specifically, the multi-layer grid structure can be first matched with a layer of breathable film, and then the metal particles can be filled in the multi-layer grid structure. Finally, another layer of breathable film can be covered so that the multi-layer grid structure and the metal particles are sandwiched between the two layers of breathable film. In this way, the metal composite unit 10 in this embodiment is obtained.

[0085] In this embodiment, the skeleton material may be fibers, and the metal particles may be metal single substances such as metal iron or metal magnesium.

[0086] In this embodiment, the multi-layer grid structure is combined with the metal particles by stacking multiple layers to achieve the combination of the skeleton material and the metal material. The metal composite unit 10 has good integrity and stability, which is convenient for the heating element 1 to heat the aerosol generating matrix. In addition, the multi-layer stacking structure also helps to regulate the heat transfer speed, reduce the probability of heat loss being too fast and affecting the oxidation reaction process of the metal material, and improve the working reliability of the heating element 1.

[0087] In some embodiments, the skeleton material is carbon nanotubes, and the metal material is metal particles deposited on the carbon nanotubes.

[0088] Specifically, the metal salt and the carbon-containing organic raw material can be mixed, and then the carbon-containing organic raw material can be subjected to a hydrothermal method to obtain carbon nanotubes, and then a reducing agent is added to carry out a reduction reaction with the metal salt to obtain carbon nanotubes with metal particles attached, and finally the metal composite unit 10 in this embodiment is obtained through high-temperature treatment.

[0089] It is understood that metal salts refer to salts whose cations are heavy metals, for example, formed by metals such as copper and iron, and the corresponding metal element can be obtained by reduction reaction with a reducing agent. The hydrothermal method refers to a chemical reaction carried out in a sealed pressure vessel with water as a solvent under high temperature and high pressure conditions.

[0090] Carbon nanotubes, also known as buckytubes, have a stable hexagonal structure.

[0091] In this embodiment, metal particles are deposited on carbon nanotubes to achieve a combination of metal material and skeleton material. The metal composite unit 10 has high thermal conductivity, which can increase the heating rate of the heating element 1 and thus improve the atomization rate. In addition, the metal composite unit 10 has high structural strength, which can also increase the structural stability of the heating element 1.

[0092] The structure of the heating element 1 is not limited.

[0093] For some examples, see Figure 1 The heating element 1 includes a fiber layer 11 and a metal composite unit 10 in a layered structure. The fiber layer 11 and the metal composite unit 10 are stacked and wound to form a core-shaped heating element 1.

[0094] Specifically, the metal composite unit 10 and the fiber layer 11 may be stacked in the thickness direction and then wound into a core-shaped heating element 1 .

[0095] It is understandable that when the metal material undergoes an exothermic oxidation reaction, the heat flows out through the air-permeable gaps of the skeleton material, and the excessive heat loss can easily cause the temperature of the exothermic oxidation reaction of the metal material to drop, affecting the progress of the oxidation reaction, and even causing the oxidation reaction to be interrupted and stop releasing heat. Therefore, in this embodiment, the fiber layer 11 can act as a thermal insulation layer. When the metal material in the metal composite unit 10 undergoes an exothermic oxidation reaction, the fiber layer 11 can reduce the impact of the external environment on the exothermic oxidation reaction, reduce the rate of heat loss, and maintain the progress of the exothermic oxidation reaction. In addition, the heating element 1 with a coiled structure can enable the metal material to fully contact with the air, thereby improving the efficiency of the exothermic oxidation reaction.

[0096] See also Figure 1 The fiber layer 11 is arranged on the outside of the metal composite unit 10 along the winding direction.

[0097] In this way, the metal composite unit 10 is arranged on the inner side of the fiber layer 11 along the winding direction. Along the winding direction, the heat generated by the metal composite unit 10 is first transmitted to the outside through the fiber layer 11 to heat and atomize the aerosol generating matrix. The fiber layer 11 can reduce the impact of the external environment on the metal composite unit 10, so that the oxidation exothermic reaction of the metal material is maintained in a relatively stable environment, thereby improving the working reliability of the heating element 1.

[0098] It is understandable that the heat transfer speed of the metal composite unit 10 can be adjusted by adjusting the thickness of the fiber layer 11, so that the oxidation reaction process of the metal material is more stable and the heating element 1 has a faster heating rate, thereby improving the atomization efficiency.

[0099] Of course, in some other embodiments, the fiber layer 11 may also be disposed on the inner side of the metal composite unit 10 along the winding direction, which is not limited here.

[0100] In some embodiments, the metal composite unit 10 is a solid columnar structure or a hollow columnar structure, and the fiber layer 11 is wrapped around the metal composite unit 10 .

[0101] For example, see Figure 2 The metal composite unit 10 is a solid columnar structure, and the fiber layer 11 is wrapped around the metal composite unit 10, that is, the internal space of the fiber layer 11 is filled with the metal composite unit 10. At this time, the airflow can enter the metal composite unit 10 from the circumference of the fiber layer 11 and contact the metal material. When the metal material undergoes an oxidative exothermic reaction, the fiber layer 11 located on the circumferential outer side reduces heat loss, so that the oxidative exothermic reaction of the metal material is maintained in a relatively stable environment.

[0102] For example, see Figure 3The metal composite unit 10 has a hollow columnar structure, and the fiber layer 11 is wrapped around the metal composite unit 10, that is, the interior of the metal composite unit 10 has a hollow space. At this time, the airflow can enter the metal composite unit 10 from the circumference of the fiber layer 11, and can also enter the metal composite unit 10 from the hollow space, thereby increasing the contact area between the metal material and the airflow. While reducing the heat loss of the metal composite material, the metal composite unit 10 can also transfer more heat to the outside, thereby increasing the heating rate of the heating element 1.

[0103] An embodiment of the present application provides an aerosol product, comprising an aerosol-generating substrate segment 2 and a heating element 1 of any embodiment of the present application, wherein the heating element 1 is used to heat the aerosol-generating substrate segment 2 .

[0104] In this embodiment, the aerosol generating substrate is a solid aerosol generating substrate segment 2, and the aerosol generating substrate segment 2 may be a columnar structure or other structures.

[0105] The heating element 1 can heat the aerosol generating substrate segment 2 by means of central heating, end heating or circumferential heating.

[0106] For some examples, see Figure 4 The heating element 1 can be inserted into the aerosol generating substrate segment 2 , and at this time, the heating element 1 transfers heat toward the center of the aerosol generating substrate segment 2 to form central heating of the aerosol generating substrate segment 2 .

[0107] For other examples, see Figure 5 The heating element 1 is arranged at the end of the aerosol generating substrate segment 2. At this time, the heating element 1 transfers heat toward the end of the aerosol generating substrate segment 2 to heat the end of the aerosol generating substrate segment 2.

[0108] It is understandable that the heating element 1 can be arranged at one end of the aerosol generating substrate segment 2 along the axial direction, or at both ends of the aerosol generating substrate segment 2 along the axial direction, and there is no limitation here.

[0109] For some more examples, see Figure 6 The heating element 1 has a hollow tubular structure, and the aerosol generating matrix segment 2 can be inserted into the heating element 1 . At this time, the heating element 1 transfers heat toward the periphery of the aerosol generating matrix segment 2 to form circumferential heating for the aerosol generating matrix segment 2 .

[0110] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the schematic representation of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0111] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A heating element, characterized in that: Used to heat an aerosol generating substrate to generate an aerosol, the heating element comprises: A metal composite unit with air-permeable gaps, the metal composite unit comprising a skeleton material and a metal material capable of undergoing an oxidative exothermic reaction, the metal material and the skeleton material being combined with each other, the metal material being used to undergo an oxidative exothermic reaction to generate heat for heating an aerosol-generating substrate.

2. The heating element according to claim 1, characterized in that: The metal material is selected from at least one of iron, aluminum, and magnesium; and / or the skeleton material includes at least one of carbon fiber, quartz fiber, porous ceramic, and porous metal oxide.

3. The heating element according to claim 1, characterized in that: The metal material is in granular form, and the maximum size does not exceed 0.1 mm; or, the metal material is in wire form, and the equivalent diameter does not exceed 0.1 mm.

4. The heating element according to claim 1, characterized in that When the metal material undergoes an oxidative exothermic reaction, the surface temperature of the metal composite unit is between 200°C and 400°C.

5. The heating element according to claim 1, characterized in that: The metal composite unit is in a membrane-like structure, and the membrane-like structure is made of a mixture of fibers, metal particles and a solvent medium, wherein the skeleton material includes the fibers, and the metal material includes the metal particles.

6. The heating element according to claim 1, characterized in that: The metal composite unit is constructed as a porous filling structure, the skeleton material is a porous structure, the metal material is metal particles, and the metal particles are filled in the pores of the porous structure; or The metal composite unit is constructed as a continuous phase structure formed by mixing and sintering metal particles and the granular skeleton material.

7. The heating element according to claim 1, characterized in that: The metal composite unit further comprises at least two layers of breathable membranes, the skeleton material is in a multi-layer grid structure and is arranged between two layers of the breathable membranes, and the metal material is metal particles and is filled in the multi-layer grid structure.

8. The heating element according to claim 1, characterized in that The skeleton material is carbon nanotubes, and the metal material is metal particles deposited on the carbon nanotubes.

9. The heating element according to any one of claims 1 to 8, characterized in that: The heating element comprises a fiber layer, The metal composite unit has a layered structure, the fiber layer and the metal composite unit are stacked and wound to form a core-shaped heating element, and the fiber layer is arranged on the outside of the metal composite unit along the winding direction; or, The metal composite unit is in a solid columnar structure or a hollow columnar structure, and the fiber layer is wrapped around the metal composite unit.

10. An aerosol product, characterized in that: include: Aerosol generating matrix segment; And the heating element according to any one of claims 1 to 8, wherein the heating element is used to heat the aerosol generating substrate segment.

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