Heating element, heating assembly and aerosol generating device

Abstract

The invention discloses a heating body, a heating assembly and an aerosol generating device. The heating body is provided with a containing cavity, the containing cavity is used for containing an aerosol generating substrate, an opening is formed in one end of the containing cavity, and the heating body comprises a connecting part and a heating part which are connected; the connecting part is connected to one end of the heating part close to the opening of the accommodating cavity; the heating part is used for generating heat under the action of the variable magnetic field to heat the aerosol generating substrate, and the magnetic conductivity of the connecting part is smaller than that of the heating part. Compared with the heating part, the connecting part is closer to the opening of the containing cavity, the magnetic conductivity of the connecting part is smaller than that of the heating part, the heating efficiency of the heating part is higher than that of the connecting part under the action of a changing magnetic field, heat generated by the heating part heats the aerosol generating matrix, and enough aerosol can be generated to meet the taste requirement of a user; meanwhile, the connecting part with lower heating efficiency can reduce the heat in the heating body to be transferred to the outside of the heating body, so that the heat utilization efficiency is improved, and the generation efficiency of the aerosol is ensured.

Description

Technical Field

[0001] The present application relates to the field of atomization technology, and more specifically, to a heating element, a heating component and an aerosol generating device. Background Art

[0002] An aerosol generating device is a small device that can generate aerosol by using a heating element to act on an aerosol generating substrate using the Heat Not Burning (HNB) technology. Therefore, the heating of the aerosol generating substrate by the heating element is crucial. However, when the current heating element heats the aerosol generating substrate, a lot of heat overflows outside the heating element, resulting in poor heating effect of the heating element, thereby affecting the aerosol generation efficiency. Summary of the invention

[0003] Embodiments of the present application provide a heating element, a heating component, and an aerosol generating device.

[0004] The heating element provided in the embodiment of the present application is provided with a receiving cavity, which is used to load the aerosol generating matrix and is provided with an opening at one end, and the heating element includes a connecting part and a heating part connected to each other; the connecting part is connected to one end of the heating part close to the opening of the receiving cavity; the heating part is used to generate heat under the action of a changing magnetic field to heat the aerosol generating matrix, wherein the magnetic permeability of the connecting part is less than the magnetic permeability of the heating part.

[0005] In some embodiments, in the axial direction of the heating element, one end of the connecting portion is connected to the heating element, and one end of the connecting portion away from the heating element is provided with a flange portion extending away from the axis of the heating element.

[0006] In some embodiments, the end of the heating part away from the connecting part is an open end; the heating element also includes a closed part, which is connected to the heating part and closes the open end of the heating part, and the magnetic permeability of the closed part is smaller than the magnetic permeability of the heating part.

[0007] In certain embodiments, the sealing portion includes a bottom and a side wall extending from the periphery of the bottom; wherein the side wall is sleeved outside the heating portion and contacts the outer peripheral wall of the heating portion.

[0008] In certain embodiments, the sealing portion includes a bottom and a side wall extending from the periphery of the bottom; wherein the side wall is sleeved in the heating portion and contacts the inner peripheral wall of the heating portion.

[0009] In certain embodiments, the enclosed portion includes a bottom and a side wall extending from a periphery of the bottom; wherein the side wall is end-to-end connected to an open end of the heating portion.

[0010] In some embodiments, a protrusion is provided on a side of the bottom facing the heating portion.

[0011] In some embodiments, the side wall, the heating portion, and the connecting portion are all hollow cylindrical.

[0012] In some embodiments, an end of the heating portion away from the connecting portion is a closed end.

[0013] The heating assembly provided in the embodiment of the present application comprises a housing and a heating element as described in any of the above embodiments. The heating element is installed in the housing.

[0014] In some embodiments, the shell includes a first cover body, a bracket and a second cover body, the first cover body and the second cover body are respectively installed at opposite ends of the bracket and together with the bracket form a receiving space, the heating element is received in the receiving space, and the flange portion of the connecting portion is clamped between the first cover body and the bracket.

[0015] In some embodiments, one end of the heating element away from the opening is spaced apart from the housing.

[0016] The present application also provides an aerosol generating device, the aerosol generating device comprising a supporting assembly and a heating assembly as described in any one of the above embodiments. The heating assembly is mounted on the supporting assembly.

[0017] In the heating element, heating assembly and aerosol generating device of the present application, the connecting part is closer to the opening of the containing cavity than the heating part, and the magnetic permeability of the connecting part is smaller than that of the heating part. Under the action of the changing magnetic field, the heating efficiency of the heating part is higher than that of the connecting part. The heat generated by the heating part heats the aerosol generating matrix and can generate sufficient aerosol to meet the user's taste requirements. At the same time, the connecting part with lower heating efficiency can reduce the heat in the heating element transferred to the outside of the heating element, improve the heat utilization efficiency, and thus ensure the aerosol generation efficiency.

[0018] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a three-dimensional schematic diagram of a heating element in some embodiments of the present application;

[0021] Figure 2It is a three-dimensional schematic diagram of a heating element in some other embodiments of the present application;

[0022] Figure 3 yes Figure 2 A cross-sectional schematic diagram of the heating element shown;

[0023] Figure 4 is a three-dimensional schematic diagram of a heating assembly according to certain embodiments of the present application;

[0024] Figure 5 yes Figure 4 A schematic cross-sectional view of the heating assembly shown;

[0025] Figure 6 is a three-dimensional schematic diagram of an aerosol generating device according to certain embodiments of the present application;

[0026] Figure 7 yes Figure 6 A three-dimensional schematic diagram of the partial structure of the aerosol generating device shown.

[0027] Description of main component symbols:

[0028] 1000. Aerosol generating device;

[0029] 100. Heating component;

[0030] 10. heating element; 11. receiving cavity; 111. opening; 13. connecting portion; 131. flange portion; 15. heating portion; 151. outer peripheral wall; 153. inner peripheral wall; 17. closing portion; 171. bottom; 173. side wall; 1711; protrusion;

[0031] 30. Shell; 31. First cover; 33. Bracket; 35. Second cover; 37. Accommodation space;

[0032] 50, coil; 70, thermal insulation; 90, magnetic conductive part;

[0033] 300, support assembly; 301, first support member; 303, second support member;

[0034] 500. Shell. DETAILED DESCRIPTION

[0035] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of the present application, and cannot be understood as limiting the embodiments of the present application.

[0036] In the description of the present application, it should be understood that the terms "thickness", "upper", "top", "bottom", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0037] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. In an example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection, or they can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements.

[0038] In the embodiments of the present application, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being “above”, “above”, and “above” a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] See also Figure 1 The heating element 10 provided in the embodiment of the present application is provided with a receiving cavity 11, the receiving cavity 11 is used to load the aerosol generating substrate and is provided with an opening 111 at one end, and the heating element 10 includes a connecting portion 13 and a heating portion 15. The connecting portion 13 is connected to one end of the heating portion 15 close to the opening 111 of the receiving cavity 11. The heating portion 15 is used to generate heat under the action of a changing magnetic field to heat the aerosol generating substrate, wherein the magnetic permeability of the connecting portion 13 is less than the magnetic permeability of the heating portion 15.

[0040] Specifically, the magnetic permeability of a material is a physical quantity that measures the degree of magnetization of a material, and is the ratio of the magnetic field strength to the magnetization strength. There is a certain relationship between magnetic permeability and temperature. Materials with magnetic permeability will generate eddy currents under the action of a changing magnetic field, and convert the electrical energy of the eddy currents into heat energy. The higher the magnetic permeability of a material, the easier it is to magnetize the material, and the more heat is generated.

[0041] The aerosol generating medium is an element that can generate aerosols through heating, ultrasound or mechanical vibration. Aerosol is a multiphase fluid with gas as a continuous phase and solid and liquid as dispersed phases. In some embodiments, the aerosol generating medium is an atomizing medium carrier loaded with liquid smoke oil. Among them, the smoke oil is a mixed liquid in which substances such as nicotine and nicotine are dissolved, and its solutes are common organic solutes and / or inorganic solutes such as propylene glycol, vegetable glycerin and pure water. After being heated by the heating element 10, the smoke oil will be dispersed into tiny mixed droplets, and will form an aerosol after mixing with air. In other embodiments, the aerosol generating medium is a leaf atomizing medium, which will volatilize tiny solid particles after being heated by the heating element 10, and will form an aerosol after mixing with air.

[0042] For the aerosol generating substrate, the heating temperature requirement varies with the position. Generally speaking, the upper section of the aerosol generating substrate has a lower heating temperature requirement than the middle section. Therefore, the heating element 10 includes a connecting portion 13 and a heating portion 15 connected to each other, and the connecting portion 13 and the heating portion 15 have different heating effects.

[0043] The heating element 10 mainly uses the heating part 15 to heat the aerosol generating substrate, so the heating part 15 can be made of a material with a higher magnetic permeability, for example, the heating part 15 can be made of Permalloy. At this time, the heating part 15 can generate more heat under the action of a changing magnetic field, thereby ensuring the heating effect of the heating element 10 in heating the aerosol generating substrate.

[0044] The connecting portion 13 is connected to one end of the heating portion 15 close to the opening 111 of the receiving cavity 11, so that the connecting portion 13 is closer to the opening 111 of the receiving cavity 11 than the heating portion 15. Therefore, the connecting portion 13 can be used to connect components other than the heating element 10, and the heat generated by the heating portion 15 can be transmitted to other components other than the heating element 10 along the connecting portion 13. At this time, the connecting portion 13 can use a material with a lower magnetic permeability, such as 304 stainless steel, so that the connecting portion 13 generates less heat or even no heat under the action of a changing magnetic field, so as to reduce the heat lost to other components through the connecting portion 13, and ensure that a large amount of heat generated by the heating element 10 can be stored in the heating element 10, thereby further ensuring the heating effect of the heating element 10 on the aerosol generating matrix.

[0045] In the heating element 10 of the embodiment of the present application, the connecting portion 13 is closer to the opening 111 of the accommodating cavity 11 than the heating portion 15, and the magnetic permeability of the connecting portion 13 is smaller than that of the heating portion 15. Under the action of the changing magnetic field, the heating efficiency of the heating portion 15 is higher than that of the connecting portion 13. The heat generated by the heating portion 15 heats the aerosol generating matrix to generate a sufficient amount of aerosol to meet the user's taste requirements. At the same time, the connecting portion 13 with lower heating efficiency can reduce the heat in the heating element 10 from being transferred to the outside of the heating element 10, thereby improving the heat utilization efficiency and ensuring the aerosol generation efficiency.

[0046] See also Figure 1 In some embodiments, in the axial direction X of the heating element 10 , one end of the connecting portion 13 is connected to the heating element 15 . The end of the connecting portion 13 away from the heating element 15 is provided with a flange portion 131 extending away from the axis of the heating element 10 .

[0047] In addition to reducing the heat overflow generated by the heating part 15, the connecting part 13 can also be used to fix the heating element 10 to other components. The flange part 131 extends away from the axis of the heating element 10, so that the other components can achieve the installation of the heating element 10 only by fixing the flange part 131. Specifically, the other components fix the flange part 131 by clamping. On the one hand, the other components can ensure the stability of the connection between the heating element 10 and other components by clamping the flange part 131. On the other hand, compared with the current solution, in order to fix the connecting part and the heating part, the other components are in close contact with the connecting part and the heating part, in the heating element 10 of the present application, the other components only need to fix the heating element 10 through the flange part 131, which can reduce the amount of heat transferred to other components and reduce the risk of large-scale heat loss.

[0048] See also Figure 1 and Figure 2 In some embodiments, the end of the heating part 15 away from the connecting part 13 is an open end; the heating element 10 also includes a closing part 17, which is connected to the heating part 15 and closes the open end of the heating part 15, and the magnetic permeability of the closing part 17 is less than the magnetic permeability of the heating part 15.

[0049] The closing portion 17 is a structure for closing one end of the heating portion 15 away from the connecting portion 13. In the present application, the closing portion 17, the heating portion 15 and the connecting portion 13 together form the receiving cavity 11. Specifically, one end of the receiving cavity 11 is open and the other end is closed, wherein the open end allows the aerosol generated by the aerosol generating substrate to pass through for inhalation by the user, and the closed end plays a sealing role to prevent the aerosol generated by the aerosol generating substrate from entering other components.

[0050] For the aerosol generating substrate, the lower section of the aerosol generating substrate has a lower heating temperature requirement than the middle section. Therefore, similar to the connecting portion 13, the magnetic permeability of the closing portion 17 can be set to be smaller, at least smaller than the magnetic permeability of the heating portion 15, so that when the heating portion 15 heats the aerosol generating substrate, the heat generated by the closing portion 17 is less, so as to reduce the heat lost from the closing portion 17 to the outside, thereby ensuring that most of the heat generated by the heating element 10 is locked in the heating element 10.

[0051] The closing portion 17 and the connecting portion 13 may also be connected along the axial direction X of the heating element 10. In this way, along the axial direction X1 of the heating element 10, the structure of the heating element 10 is the connecting portion 13, the heating portion 15 and the closing portion 17 in sequence, so that the heating effect of each part of the heating element 10 can meet the requirements of the corresponding position of the aerosol generating substrate for the heating temperature, thereby improving the utilization rate of the heat generated by the heating element 10.

[0052] The closing portion 17 can be made of a metal material or a non-metal material. When the closing portion 17 is made of a metal material, the closing portion 17 can be made of a non-ferromagnetic material such as 304 stainless steel or zinc to improve the strength of the closing portion 17; when the closing portion 17 is a non-metal material, the closing portion 17 can be made of a high-temperature resistant material such as ceramic, silicon dioxide or high-temperature resistant plastic to increase the service life of the closing portion 17 under high temperature conditions by utilizing the high-temperature resistant property. In addition, the shape of the closing portion 17 can be set to be a bowl-shaped with an internal depression to increase the accommodation space of the closing portion 17, thereby increasing the volume of the receiving chamber 11, so that the receiving chamber 11 can be suitable for a larger size of aerosol generating substrate.

[0053] Specifically, see Figure 3 The enclosing portion 17 includes a bottom 171, and the shape of the cross section of the bottom 171 can be a square, a circle, a triangle, etc. The shape of the cross section of the bottom 171 will affect the shape of the receiving cavity 11. When the shape of the cross section of the bottom 171 is a square, the shape of the receiving cavity 11 is a cube or a cuboid; when the shape of the cross section of the bottom 171 is a circle, the shape of the receiving cavity 11 is a cylinder; when the shape of the cross section of the bottom 171 is a triangle, the shape of the receiving cavity 11 is a triangular prism. Similarly, the shape of the cross section of the heating portion 15 can also be a square, a circle, a triangle, etc. For ease of installation, the shape of the cross section of the bottom 171 is usually the same as the shape of the cross section of the heating portion 15. For example, when the shape of the cross section of the bottom 171 is a square, the shape of the cross section of the heating portion 15 is also a square.

[0054] Furthermore, the installation methods of the closing portion 17 and the heating portion 15 can be various. In one embodiment, the closing portion 17 can be connected to the heating portion 15 by non-detachable methods such as riveting, welding, gluing, etc., to improve the stability between the closing portion 17 and the heating portion 15, thereby avoiding looseness between the closing portion 17 and the heating portion 15, which makes it difficult for the heating portion 15 to stably heat the aerosol generating matrix. In another embodiment, the closing portion 17 can be connected to the heating portion 15 by detachable methods such as threaded connection, bolts, and clamping, so that when the heating portion 15 or the closing portion 17 is damaged, the heating portion 15 and the closing portion 17 can be disassembled for repair or replacement.

[0055] For further information, see Figure 1 The closed portion 17 further includes a side wall 173 extending from the periphery of the bottom 171. There are many ways to connect the closed portion 17 and the heating portion 15. In some embodiments, the side wall 173 is sleeved outside the heating portion 15 and contacts the outer peripheral wall 151 of the heating portion 15. For example, Figure 1 Specifically, the closing portion 17 can be sleeved on the outer peripheral wall 151 of the closed end to reduce the area of ​​the heating portion 15 in contact with the outside world. Since the magnetic permeability of the closing portion 17 is smaller than that of the heating portion 15, the heat generated by the closing portion 17 is less than that generated by the heating portion 15, so that the heating element 10 can reduce the heat dissipated to the outside world through the closing portion 17.

[0056] In other embodiments, the side wall 173 is sleeved in the heating portion 15 (not shown) and contacts the inner peripheral wall 153 of the heating portion 15. On the one hand, the closing portion 17 can close the open end of the heating portion 15 to prevent the aerosol generated by the aerosol generating substrate from entering other components. On the other hand, the heating element 10 uses the closing portion 17 to reduce heat loss and lock most of the heat generated by the heating element 10 in the heating element 10.

[0057] See also Figure 3 In some other embodiments, the side wall 173 is connected to the open end of the heating part 15 end to end, that is, the edge of the end of the side wall 173 away from the bottom 171 is connected to the edge of the open end of the heating part 15. In this case, the heating element 10 can connect the side wall 173 and the open end of the heating part 15 by welding or other methods. In this way, on the one hand, the heating element 10 can increase the volume of the receiving cavity 11 by using the connected closed part 17, so that the receiving cavity 11 can be suitable for a larger size of aerosol generating substrate. On the other hand, the heating element 10 can reduce the loss of heat by using the closed part 17, and lock most of the heat generated by the heating element 10 in the heating element 10.

[0058] For further information, see Figure 3 In some embodiments, a protrusion 1711 is provided on the side of the bottom 171 facing the heating portion 15 .

[0059] During the process of heating the aerosol generating substrate by the heating element 10, the aerosol generating substrate needs to combine with air to generate aerosol, and the contact area between the air and the aerosol generating substrate will affect the aerosol generation efficiency. The larger the contact area between the air and the aerosol generating substrate, the higher the aerosol generation efficiency.

[0060] The protrusion 1711 can be used to carry the aerosol generating substrate, so that there is a gap between the bottom 171 of the closed part 17 and the aerosol generating substrate. When the air enters the heating element 10, the air can enter the aerosol generating substrate through the gap between the bottom 171 of the closed part 17 and the aerosol generating substrate, so as to increase the contact area between the aerosol generating substrate and the air, thereby ensuring the aerosol generation efficiency. Of course, the protrusion 1711 located at the bottom 171 can extend to the side wall 173, so that the aerosol generating substrate will not directly contact the side wall 173, and the air can also flow between the gap between the aerosol generating substrate and the side wall 173, thereby further increasing the contact area between the aerosol generating substrate and the air.

[0061] See also Figure 3 In some embodiments, the side wall 173, the heating portion 15 and the connecting portion 13 are all hollow cylindrical. The hollow parts of the side wall 173, the heating portion 15 and the connecting portion 13 and the bottom 171 together form a receiving cavity 11, wherein the receiving cavity 11 is cylindrical in shape, and the aerosol generating substrate can be placed in the receiving cavity 11. At the same time, it can be understood that the hollow structure can reduce the weight of the corresponding components and make the corresponding components lighter. Therefore, the side wall 173, the heating portion 15 and the connecting portion 13, which are all hollow cylindrical, can make the heating portion 10 as a whole lighter.

[0062] See also Figure 1 In some embodiments, the end of the heating portion 15 away from the connecting portion 13 may also be a closed end to prevent the aerosol generated by the aerosol generating substrate from entering other components. At this time, similar to the closed portion 17, a protrusion 1711 may be provided on the side of the closed end facing the opening 111, so that there is a gap between the closed end and the aerosol generating substrate. When the air enters the heating element 10, the air can enter the aerosol generating substrate through the gap between the closed end and the aerosol generating substrate to increase the contact area between the aerosol generating substrate and the air, thereby ensuring the aerosol generation efficiency. Alternatively, the heating portion 15 may also be provided with a guide member extending along the axial direction X1 of the heating element 10 on the side of the side wall of the heating portion 15 facing the receiving cavity 11, so that the guide member can not only play a guiding role when the aerosol generating substrate enters or withdraws from the receiving cavity 11, but also prevent the aerosol generating substrate from directly contacting the side wall of the heating portion 15, ensuring that the air can flow smoothly in the receiving cavity 11 and fully contact the aerosol generating substrate.

[0063] In addition, when the end of the heating portion 15 away from the connecting portion 13 is a closed end, the heating element 10 can be provided with the closed portion 17 in the heating portion 15, for example Figure 1 On the one hand, the heating element 10 can reduce the heat loss by using the sealing part 17, and on the other hand, the sleeve method can make the installation of the sealing part 17 more convenient. In particular, the material of the sealing part 17 can also be rubber, so that while ensuring that the sealing part 17 can reduce the heat loss, the sealing part 17 can use the elasticity of rubber to adapt itself to the heating part 15 of more sizes and make itself fit the heating part 15 well.

[0064] See also Figure 4 The heating assembly 100 provided in the embodiment of the present application includes the heating element 10 and the shell 30 of any of the above embodiments, and the heating element 10 is installed in the shell 30.

[0065] Specifically, the shell 30 is a structure with a cavity for accommodating other components. The other components of the heating component 100 can be installed in the shell 10. The shell 30 can be used to isolate the other components of the heating component 10 from the outside world to prevent the other components from being easily damaged by external forces and prevent external impurities, such as dust, from entering the other components and affecting the normal operation of the other components.

[0066] Please combine Figure 5 The connection part 13 of the heating element 10 can be connected to the housing 30 to fix the heating element 10 inside the housing 30. When the heating element 10 heats the aerosol generating substrate, the heating component 100 uses the heating part 15 with a higher magnetic permeability to heat the aerosol generating substrate to generate a sufficient amount of aerosol to meet the taste requirements of the user, and uses the connection part 13 and the sealing part 17 with a lower magnetic permeability to reduce the heat lost from the heating element 10 to the housing 30, thereby improving the utilization rate of the heat generated by the heating element 10.

[0067] Furthermore, the heating assembly 100 may include a coil 50, a heat insulating member 70 and a magnetic conductive member 90. The coil 50 is arranged around the heating element 10. When powered, the coil 50 can generate a changing magnetic field, so that the heating portion 15 generates heat and heats the aerosol generating matrix. The heat insulating member 70 is a structure with a certain heat insulating effect. The heat insulating member 70 can be arranged between the heating element 10 and the coil 50 to block the heat on the heating element 10 from being transferred toward the coil 50, thereby reducing the loss of heat generated by the heating element 10 and ensuring the heating effect of the heating element 10. At the same time, the heating assembly 100 can also use the heat insulating member 70 to block the heat on the heating element 10 from being transferred to the shell 30, so as to avoid the situation where the temperature of the shell 30 is too high and affects the user's experience. Alternatively, the heat insulating member 70 may also be disposed between the coil 50 and the housing 30 to block the heat on the heating element 10 and the coil 50 from being transmitted toward the housing 30, and to lock the heat generated by the heating element 10 and the coil 50 in the coil 50 and the heating element 10, so that more heat can be used in heating the aerosol generating substrate. The magnetic conductive member 90 is a structure that can change the direction of the magnetic lines of force of the magnetic field, and the magnetic conductive member 90 can concentrate the direction of the magnetic lines of force in the direction required for heating. The magnetic conductive member 90 may be disposed between the coil 50 and the housing 30, and fit the inner surface of the housing 30, so that the magnetic field generated by the coil 50 can be more concentrated at the position of the heating portion 15 under the action of the magnetic conductive member 90, so that the intensity of the magnetic field acting on the heating portion 15 is stronger, thereby making the heating efficiency of the heating portion 15 higher.

[0068] See also Figure 4 and Figure 5 In some embodiments, the shell 30 includes a first cover body 31, a bracket 33 and a second cover body 35. The first cover body 31 and the second cover body 35 are respectively installed at opposite ends of the bracket 33, and together with the bracket 33, they form a receiving space 37. The heating element 10 is received in the receiving space 37, and the flange portion 131 of the connecting portion 13 is clamped between the first cover body 31 and the bracket 33.

[0069] The first cover 31 can be installed on the bracket 33 by a detachable method such as snap-fitting, so that the installation and removal of the first cover 31 and the bracket 33 are more convenient. In other embodiments, the first cover 31 can be installed on the bracket 33 by a non-detachable method such as riveting, welding, gluing, etc., to strengthen the connection and fixation of the first cover 31 and the bracket 33, so as to avoid the first cover 31 and the bracket 33 being unstable during the operation of the heating component 10, resulting in poor heating effect of the heating component 10. Similarly, the second cover 35 can be installed on the bracket 33 by a detachable method such as snap-fitting, so that the installation and removal of the second cover 35 and the bracket 33 are more convenient. The second cover 35 can also be installed on the bracket 33 by a non-detachable method such as riveting, welding, gluing, etc., to strengthen the connection and fixation of the second cover 35 and the bracket 33. Among them, the installation methods of the first cover body 31 and the second cover body 35 can be the same, for example, the first cover body 31 and the second cover body 35 are both installed on the bracket 33 by snap-fitting; the installation methods of the first cover body 31 and the second cover body 35 can also be different, for example, the first cover body 31 is installed on the bracket 33 by riveting, and the second cover body 35 is installed on the bracket 33 by snap-fitting.

[0070] Other components in the heating component 100 can use the various components of the shell 30 to complete their own installation. For example, the connecting portion 13 includes a flange portion 131 extending away from the axis of the accommodating cavity 11. At this time, the heating component 100 can complete the installation and fixation of the heating element 10 by clamping and fixing the flange portion 131 between the first cover body 31 and the bracket 33. At the same time, the method of connecting the heating element 10 and the shell 30 through the flange portion 131 can reduce the contact area between the heating element 10 and the shell 30, thereby reducing the heat lost from the heating element 10 to the shell 30.

[0071] See also Figure 4 and Figure 5 In some embodiments, the end of the heating element 10 away from the opening 111 is spaced from the shell 30 to avoid the situation where the end of the heating element 10 away from the opening 111 is in direct contact with the shell 30, resulting in a large amount of heat loss. At the same time, the flange portion 131 is clamped between the first cover body 31 and the bracket 33, and both the cross-sectional dimensions of the bracket 33 and the cross-sectional dimensions of the second cover body 35 are larger than the cross-sectional dimensions of the heating portion 15 and the cross-sectional dimensions of the closing portion 17. Therefore, only the flange portion 131 of the heating element 10 is in direct contact with the shell 30. In this way, the contact area between the heating element 10 as a whole and the shell 30 is small, so that the heating element 10 can better achieve heat insulation, reduce the heat lost from the heating element 10 to the shell 30, and the heat generated by the heating element 10 can be locked in the heating element 10 to a greater extent, thereby improving the heating effect of the heating element 10.

[0072] Furthermore, the specific position of the heat insulating member 70 may be various. In one embodiment, the heat insulating member 70 is disposed between the coil 50 and the bracket 33, so as to ensure the heat insulating effect of the heat insulating member 70 on the one hand, and to reduce the area of ​​the heat insulating member 70 on the other hand, so as to reduce the manufacturing cost of the heat insulating member 70. In another embodiment, the heat insulating member 70 is disposed between the coil 50 and the first cover 31, and between the coil 50 and the bracket 33, or between the coil 50 and the second cover 35, and between the coil 50 and the bracket 33, so as to improve the heat insulating effect of the heat insulating member 70 by increasing the number and contact area of ​​the heat insulating member 70. In another embodiment, the heat insulating member 70 is disposed between the coil 50 and the first cover 31, the coil 50 and the second cover 35, and the coil 50 and the bracket 33, so as to enable the heat insulating member 70 to cover the contact position between the coil 50 and the housing 30 as much as possible, thereby enhancing the strength of the heat insulating member 70 to prevent heat loss.

[0073] In the heating component 100 of the embodiment of the present application, the connecting portion 13 is closer to the opening 111 of the accommodating cavity 11 than the heating portion 15, and the magnetic permeability of the connecting portion 13 is smaller than that of the heating portion 15. Under the action of the changing magnetic field, the heating efficiency of the heating portion 15 is higher than that of the connecting portion 13. The heat generated by the heating portion 15 heats the aerosol generating matrix and can generate a sufficient amount of aerosol to meet the user's taste requirements. At the same time, the connecting portion 13 with lower heating efficiency can reduce the heat in the heating body 10 from being transferred to the outside of the heating body 10, thereby improving the heat utilization efficiency and ensuring the aerosol generation efficiency.

[0074] See also Figure 5 and Figure 6 The aerosol generating device 1000 provided in the embodiment of the present application includes the heating component 100 and the supporting component 300 of any one of the above-mentioned embodiments, and the heating component 100 is installed on the supporting component 300.

[0075] Specifically, the aerosol generating device 1000 is a structure capable of generating aerosol by acting on an aerosol generating substrate through resistance heating, electromagnetic heating, microwave heating, laser irradiation, infrared light irradiation, ultrasound or mechanical vibration.

[0076] The support assembly 100 is a structure for installing and supporting other components. The support assembly 100 of the present application is used to install and support other components in the aerosol generating device 1000. The heating assembly 100 can be installed on the support assembly 300 in a detachable manner such as snap-fitting. The components of the support assembly 300 itself, such as the first support member 301 and the second support member 303 included in the support assembly 300, can be installed in a variety of ways. In some embodiments, the first support member 301 and the second support member 303 are connected by snap-fitting, and the two ends of the heating assembly 100 are respectively snap-fitted with the first support member 301 and the second support member 303 to complete the installation of the heating assembly 100, so that the installation and disassembly between the support assembly 300 and the heating assembly 100, as well as the installation and disassembly of the support assembly 300 itself, are more convenient. In other embodiments, the first support member 301 and the second support member 303 are connected in a non-detachable manner by riveting, welding, gluing, etc., and the two ends of the heating component 100 are respectively engaged with the first support member 301 and the second support member 303 to complete the installation of the heating component 100.

[0077] In particular, a heat insulation structure may be provided between the heating component 100 and the support component 300. For example, a heat insulation rib having a certain height and being in contact with the heating component 100 and the support component 300 may be provided at the contact position of the heating component 100 and the support component 300 to reduce the contact area between the heating component 100 and the support component 300, thereby reducing the heat transferred between the two.

[0078] Please combine Figure 1 Thus, when the aerosol generating device 1000 is assembled and starts to heat the aerosol generating substrate, the aerosol generating device 1000 can first use the heating portion 15 with a higher magnetic permeability to heat the aerosol generating substrate to generate a large amount of aerosol to meet the user's taste requirements. The aerosol generating device 1000 also utilizes the connection portion 13 and the sealing portion 17 with lower magnetic permeability to reduce the heat lost from the heating element 10 to the outside of the heating element 10; and reduces the contact area between the heating element 10 and the shell 30 through the flange portion 131 to further reduce the heat lost from the heating element 10 to the outside of the heating element 10; then the aerosol generating device 1000 can further reduce the heat lost from the heating element 10 to the outside of the heating element 10 or the outside of the heating component 100 through the thermal insulation member 70 between the heating element 10 and the coil 50; finally, the aerosol generating device 1000 reduces the heat lost to the outside of the heating element 100 through the thermal insulation structure between the heating component 100 and the supporting component 300, so as to utilize multiple methods to reduce the lost heat, thereby ensuring the heating effect of the heating element 10.

[0079] In addition, the aerosol generating device 1000 may further include a shell 500, which is a structure having a cavity for accommodating other components. The heating component 100 and the support component 300 are both arranged inside the shell 500, so that the shell 500 can ensure the aesthetics of the aerosol generating device 1000 while preventing external impurities, such as dust, from falling into the heating component 100, thereby affecting the normal operation of the heating component 100.

[0080] Furthermore, when the heating element 10 heats the aerosol generating substrate, it is also necessary to ensure that the heating temperature is within an appropriate range. If the heating temperature is too low, the aerosol generation rate may be low, resulting in certain waste. If the heating temperature is too high, the aerosol generating substrate may be carbonized. Therefore, the aerosol generating device 1000 also needs to obtain the heating temperature of the heating element 10 to achieve heating temperature control.

[0081] Current aerosol generating devices usually set a temperature measuring film on the heating element and reflect the temperature of the heating element based on the feedback of the temperature measuring film. However, this method essentially borrows the characteristics of other substances to indirectly reflect the heating temperature of the heating element, which is mixed with many uncertainties. For example, the heat conduction between the temperature measuring film and the heating element delays the heat exchange. The temperature measuring film itself has heat capacity, and some energy will naturally be consumed during the transfer process. At the same time, the process molding method and protection method of the temperature measuring film itself will limit the manufacturing shape of the heating element.

[0082] Research has found that changes in the electrical parameters of the coil 50 (such as inductance, AC resistance or quality factor) are directly related to changes in the magnetic permeability of the heating element 10, and the magnetic permeability of some materials changes with changes in the temperature of the body. For example, soft magnetic materials have a Curie temperature point. When some soft magnetic materials are below the Curie temperature point, the change in magnetic permeability with temperature is not obvious. Only when they are close to the Curie temperature point, the change in magnetic permeability with temperature is obvious. For another example, when some soft magnetic materials are below the Curie temperature point, their magnetic permeability gradually decreases with rising temperature. For example, the magnetic permeability of soft magnetic alloy 1j77 such as Permalloy has a first temperature transition point, a second temperature transition point and a Curie temperature point. Before the temperature of the material reaches the first temperature transition point, the magnetic permeability of the material remains basically unchanged. When the temperature of the material reaches the first temperature transition point and the temperature continues to rise, the magnetic permeability of the material begins to decrease gradually and regularly with the increase in temperature, until the temperature rises to the second temperature transition point, the rate of change of the magnetic permeability of the material begins to increase, until the temperature reaches the Curie point of the material, the magnetic permeability decreases to zero, and the material completely loses its magnetism.

[0083] Therefore, the heating element 10 of the present application can be made of soft magnetic materials, and when selecting soft magnetic materials, soft magnetic materials whose Curie temperature matches the use temperature range of the aerosol generating matrix can be selected. For example, the use temperature range of the aerosol generating matrix is ​​generally within 500 degrees, and the Curie temperature of soft magnetic alloys 1j77 such as Permalloy is about 400 degrees, so the heating element 10 can be made of soft magnetic alloys 1j77 such as Permalloy. In this way, the aerosol generating device 1000 can first establish the relationship between temperature and magnetic permeability based on the material properties of the heating element 10, and after combining the relationship between magnetic permeability and the electrical parameters of the coil 50 itself, the relationship between the heating temperature and the electrical parameters of the coil 50 itself can be established. The aerosol generating device 1000 only needs to measure the electrical parameters of the coil 50 to infer the heating temperature of the heating element 10 through the measured values, thereby forming a complete temperature feedback link. The aerosol generating device 1000 can control the temperature of the heating element 10 through this link and avoid the problems caused by using external objects to measure the temperature to assist in temperature control.

[0084] In the aerosol generating device 1000 of the embodiment of the present application, the connecting portion 13 is closer to the opening 111 of the accommodating cavity 11 than the heating portion 15, and the magnetic permeability of the connecting portion 13 is smaller than that of the heating portion 15. Under the action of the changing magnetic field, the heating efficiency of the heating portion 15 is higher than that of the connecting portion 13. The heat generated by the heating portion 15 heats the aerosol generating matrix and can generate a sufficient amount of aerosol to meet the user's taste requirements. At the same time, the connecting portion 13 with lower heating efficiency can reduce the heat in the heating body 10 from being transferred to the outside of the heating body 10, thereby improving the heat utilization efficiency and ensuring the aerosol generation efficiency.

[0085] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to 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.

[0086] In addition, 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 at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, unless otherwise clearly and specifically defined.

[0087] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A heating element, characterized in that: The heating element is provided with a receiving cavity, the receiving cavity is used to load the aerosol generating matrix and is provided with an opening at one end, and the heating element includes a connecting portion and a heating portion connected to each other; The connecting portion is connected to one end of the heating portion close to the opening of the receiving cavity; The heating portion is used to generate heat under the action of a changing magnetic field to heat the aerosol generating substrate, wherein the magnetic permeability of the connecting portion is smaller than the magnetic permeability of the heating portion.

2. The heating element according to claim 1, characterized in that: In the axial direction of the heating element, one end of the connection portion is connected to the heating element, and one end of the connection portion away from the heating element is provided with a flange portion extending away from the axis of the heating element.

3. The heating element according to claim 1 or 2, characterized in that: The end of the heating part away from the connecting part is an open end; the heating element further comprises: A closing portion is connected to the heating portion and closes an open end of the heating portion, wherein the magnetic permeability of the closing portion is smaller than the magnetic permeability of the heating portion.

4. The heating element according to claim 3, characterized in that: The enclosed portion includes a bottom and a side wall extending from the periphery of the bottom; wherein, The side wall is sleeved outside the heat generating portion and contacts the outer peripheral wall of the heat generating portion; or, The side wall is sleeved in the heat generating portion and contacts the inner peripheral wall of the heat generating portion; or, The side wall is connected to the open end of the heat generating portion end to end.

5. The heating element according to claim 4, characterized in that: A protrusion is provided on one side of the bottom facing the heating part. 6 . The heating element according to claim 4 , wherein the side wall, the heating portion and the connecting portion are all hollow cylindrical.

7. The heating element according to claim 1 or 2, characterized in that: One end of the heating portion away from the connecting portion is a closed end.

8. A heating component, characterized in that: include: case; and The heating element according to any one of claims 1 to 7, wherein the heating element is mounted on the shell.

9. The heating assembly according to claim 8, characterized in that The shell includes a first cover body, a bracket and a second cover body. The first cover body and the second cover body are respectively installed at opposite ends of the bracket and together with the bracket form a receiving space. The heating element is received in the receiving space, and the flange portion of the connecting portion is clamped between the first cover body and the bracket.

10. The heating assembly according to claim 8, characterized in that One end of the heating element away from the opening is spaced apart from the housing.

11. An aerosol generating device, characterized in that: include: Support components; and The heating component according to any one of claims 8 to 10 is mounted on the supporting component.

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