Aerosol generator and its heating structure

Abstract

The present invention provides an aerosol generator and its heating structure. The heating structure includes a heating element (1) and a tube (2), and the heating element (1) and the tube wall of the tube (2) are installed at least partially spaced apart. The heating element (1) is used to be heated by current and emit infrared light, which passes through the tube (2) and heats the aerosol-forming matrix. The tube (2) includes a first part (21) and a second part (22) distributed along its axial direction, and the first part (21) and the second part (22) are arranged such that the first part (21) is heated to a higher temperature than the second part (22) when the heating element is energized. The heating element (1) can heat the aerosol-forming matrix by emitting infrared light when energized, which not only prevents the aerosol-forming matrix from burning excessively but also significantly improves the suction experience. Because the temperature of the first part (21) of the tube is higher than that of the second part (22), a temperature field distribution with a gradient difference is formed, which improves the consistency of the draw and increases the amount of atomization.

Description

【Technical Field】 【0001】 The present invention relates to the field of non-combustion and heating atomization, and particularly to an aerosol generating device and its heating structure. 【Background Art】 【0002】 In the field of HNB (non-combustion and heating) atomization, a center-type heating structure employs a heating element provided inside a quartz tube. When power is applied to the heating element, infrared light is radiated externally to heat an aerosol-forming matrix. Since the temperature field distribution of the heating structure has a very important influence on the consistency of the draw response and the magnitude of the atomization amount, when heating the aerosol-forming matrix by infrared light, the rationality of the temperature field distribution of the heating element and the quartz glass tube becomes extremely important. 【Summary of the Invention】 【0003】 The technical problem to be solved by the present invention is to provide an improved heating structure. 【0004】 The technical solution adopted by the present invention to solve the above technical problem is as follows. It includes a heating element and a tube body. The heating element and the tube wall of the tube body are at least partially spaced apart. The heating element is used to be heated by energization to radiate infrared light. The infrared light passes through the tube body to heat an aerosol-forming matrix. The tube body includes a first portion and a second portion distributed along its axial direction. The first portion and the second portion are arranged to provide a heating structure such that when the heating element is energized, the first portion is heated to a higher temperature than the second portion. 【0005】 Preferably, the tube body includes a closed end and an open end. The heating element enters the tube body from the open end and contacts or is spaced apart from the closed end. The first portion is close to the closed end, and the second portion is close to the open end. 【0006】 Preferably, the maximum operating temperature range of the first part is 350 to 550°C, and the maximum operating temperature of the second part is 250°C or less. 【0007】 Preferably, the length of the first portion is greater than or equal to the length of the second portion. 【0008】 Preferably, the length range of the first part is 5 mm to 12 mm, the length range of the second part is 4 to 10 mm, or the ratio of the length of the first part to the length of the second part is 1 or more and 2 or less. 【0009】 Preferably, the heating element is provided in a vertically elongated manner, and the heating element includes a heating portion adjacent to the closed end and a conductive portion connected to the heating portion, and the ratio of the length of the first portion to the length of the heating portion is 0.8 or more and 1.5 or less. 【0010】 Preferably, the maximum operating temperature of the heating element is 500°C to 1200°C, and the maximum operating temperature range of the conductive element is 150°C to 450°C. 【0011】 Preferably, the heating element includes at least a plurality of sequentially connected helical segments. 【0012】 Preferably, the heating element is provided with a top end and a pin end at both ends, the pin end being electrically connected to the conductive part, the top end being in contact with or spaced apart from the inner wall of the closed end, and at least some of the helical segments are at a higher temperature than the top end and the pin end. 【0013】 Preferably, the length of the helical segment is 5 mm to 12 mm, and the gap between the helical segment and the inner wall of the pipe is 0.05 mm to 0.5 mm. 【0014】 Preferably, the multiple helical segments are installed at equal intervals, or in an alternating pattern of sparse and dense arrangement. 【0015】 Preferably, the heating element further includes a mounting base for fixing the pipe, the mounting base being located in the second portion, the heating element further includes a connecting portion for connecting the heating portion and the conductive portion, the mounting base being located between the open end and the connecting portion in the axial direction of the pipe, and spaced apart from the connecting portion. 【0016】 Preferably, the distance between the connection portion and the mounting base is 2 mm to 10 mm. 【0017】 Preferably, the second portion covers a part of the end of the heating element that is close to the conductive part. 【0018】 Preferably, the first portion covers a part of the end of the conductive portion that is close to the heat-generating portion. 【0019】 Preferably, the tube is used to be at least partially inserted into the aerosol-forming matrix, and infrared light generated by the heating element passes through the tube to heat the aerosol-forming matrix. 【0020】 Preferably, the heating element includes a heating substrate and an infrared light emitting layer provided on the outer surface of the heating substrate, and the heating substrate is heated by an electric current to excite the infrared light emitting layer and emit infrared light. 【0021】 The present invention further provides an aerosol generating device comprising the above-described heating structure and a power supply assembly that supplies power to the heating structure. 【0022】 By implementing the present invention, the following beneficial effects are achieved. Specifically, when the heating element generates heat while energized, it can emit infrared light, which penetrates the tube and reaches the aerosol-forming matrix, heating it. This not only prevents the aerosol-forming matrix from burning excessively, but also significantly improves the draw. Furthermore, because the temperature of the first part of the tube is higher than that of the second part, a temperature field distribution with a gradient difference is formed, improving the consistency of the draw and increasing the amount of atomization. 【Brief Description of the Drawings】 【0023】 The present invention will be further described below with reference to the drawings and embodiments. The drawings are as follows. [Figure 1] It is a schematic configuration diagram of an aerosol generator in some embodiments according to the present invention. [Figure 2] It is a cross-sectional view of a heat generation structure in some embodiments according to the present invention. [Figure 3] It is a schematic configuration diagram of a heating element in some embodiments according to the present invention. [Figure 4] It is a cross-sectional view of a heating element in some embodiments according to the present invention. [Figure 5] It is a schematic configuration diagram of a heat generation part in the first embodiment according to the present invention. [Figure 6] It is a schematic configuration diagram of a heat generation part in the second embodiment according to the present invention. [Figure 7] It is a schematic configuration diagram of a heat generation part in the third embodiment according to the present invention. [Figure 8] It is a schematic configuration diagram of a heat generation part in the fourth embodiment according to the present invention. [Figure 9] It is a schematic configuration diagram of a heat generation part in the fifth embodiment according to the present invention. [Figure 10] It is a schematic configuration diagram of a heat generation part in the sixth embodiment according to the present invention. 【Modes for Carrying Out the Invention】 【0024】 In order to more clearly understand the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will be described in detail below with reference to the drawings. In the following description, directions and positional relationships indicated by terms such as "front," "back," "top," "bottom," "left," "right," "vertical," "horizontal," "vertical," "horizontal," "top," "bottom," "inside," "outside," "tip," and "end" are based on the directions and positional relationships shown in the attached drawings, and do not indicate that the device or component mentioned must have a specific direction of structure and operation. This is merely to facilitate the explanation of the present invention and should not be interpreted as a limitation of the present invention. 【0025】 Furthermore, unless otherwise specified, the terms “attachment,” “connection,” “connection,” “fixing,” and “installation” should be understood in a broad sense, for example, that a connection may be fixed, detachably connected, or integrally connected; that connection may be mechanical or electrical; that connection may be direct or indirectly connected via an intermediate medium; that connection may be internal communication between two parts or an interacting relationship between two parts. When one part is described as being “on” or “below” another part, that part may be “directly” or “indirectly” on the other part, or one or more intermediate parts may be interposed. Terms such as “first,” “second,” and “third” are merely for the purpose of explaining the present invention and should not be understood as indicating or suggesting relative importance or implicitly indicating the quantity of the technical features being indicated. Thus, features limited as “first,” “second,” “third,” etc. may explicitly or implicitly include one or more such features. A person skilled in the art will be able to understand the specific meaning of the above terms in this application depending on the specific circumstances. 【0026】 In the following description, specific details such as particular system structures and techniques are provided for illustrative purposes, not limitation, to enable a full understanding of embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention can be realized in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, apparatus, circuits, and methods are omitted so as not to hinder the description of the present invention with unnecessary details. 【0027】 Figure 1 shows an aerosol generator in several embodiments of the present invention. The aerosol generator 100 employs a non-combustion, low-temperature heating method to heat the aerosol-forming matrix 200, and has good atomization stability and a good inhalation feel when atomized. In some embodiments, the aerosol-forming matrix 200 is installed in the aerosol generator 100 in a removable manner, and the aerosol-forming matrix 200 can be cylindrical. Specifically, the aerosol-forming matrix can be a solid material in the form of a strip, sheet, or integrally molded material made from the leaves and / or stems of a plant (e.g., tobacco), and aroma components can be further added to the solid material. Furthermore, the aerosol generator 100 includes a heating structure and a power supply assembly 20, the power supply assembly 20 is used to supply power to the heating structure. 【0028】 Figures 2 to 4 show a heating structure in several embodiments of the present invention. The heating structure can be used to be partially inserted into an aerosol-forming matrix 200, specifically, by inserting a portion of it into a medium segment of the aerosol-forming matrix 200, and generating infrared light when energized to heat the medium segment of the aerosol-forming matrix 200, atomizing it and generating an aerosol. The heating structure may include a heating element 1 and a tube 2, the heating element 1 being provided in a vertically elongated manner and including interconnected heating parts 11 and conductive parts 12. The heating parts 11 generate heat when energized and are used to excite an infrared light emission layer 14 and emit infrared light. The heating element 1 and the tube wall of the tube 2 are spaced apart, and the tube 2 is provided to cover at least a portion of the heating element 1, allowing light waves to penetrate to the aerosol-forming matrix 200. Specifically, in this embodiment, since the tube 2 can transmit infrared light, it becomes easier for the heating element 1 to emit infrared light and heat the aerosol-forming matrix 200. 【0029】 In some embodiments, the heating element 1 includes a heating substrate and an infrared light emitting layer 14 covering the outside of the heating substrate, wherein the heating substrate includes a metal substrate (e.g., a metal wire) having high-temperature oxidation resistance. The heating substrate may be a metallic material having good high-temperature oxidation resistance, high stability, and resistance to deformation, such as a nickel-chromium alloy substrate (e.g., nickel-chromium alloy wire) or an iron-chromium-aluminum alloy substrate (e.g., iron-chromium-aluminum alloy wire). In some embodiments, the diameter of the metal wire may be 0.15 mm to 0.8 mm (including 0.15 mm and 0.8 mm). The metal wire can be bent or wound into various shapes such as spiral, mesh, M-shaped, or N-shaped, and the bent or wound heating element as a whole exhibits a three-dimensional or planar shape having cylindrical, spiral segment, mesh, and other bent parts. 【0030】 In some embodiments, the heating element 1 further includes an antioxidant layer, which is formed between the heating substrate and the infrared light emitting layer 14. Specifically, the antioxidant layer may be an oxide film. After high-temperature heat treatment, the heating substrate forms a dense oxide film on its surface, and this oxide film becomes the antioxidant layer. Of course, in some other embodiments, the antioxidant layer is not limited to including an oxide film formed on itself, and in some other embodiments, it may be an antioxidant coating applied to the outer surface of the heating substrate. The thickness of the antioxidant layer can be selected from a range of 1 μm to 150 μm (including 1 μm and 50 μm). 【0031】 In some embodiments, the infrared light emitting layer 14 may be an infrared light layer. This infrared light layer is obtained by forming an infrared light layer-forming substrate on the side of the antioxidant layer away from the heat-generating substrate by high-temperature heat treatment. Specifically, the infrared light layer-forming substrate can be silicon carbide, spinel, or a composite substrate thereof. Of course, it should be understood that in some other embodiments, the infrared light emitting layer is not limited to an infrared light layer, and in some other embodiments, the infrared light emitting layer may be a composite infrared light layer. Specifically, the infrared light layer can be formed on the side of the antioxidant layer away from the heat-generating substrate by methods such as dip coating, spray coating, or brush coating. The thickness of the infrared light emitting layer may be 10 μm to 300 μm (including 10 μm and 300 μm). 【0032】 Preferably, the tube 2 may be a quartz glass tube. Of course, it should be understood that in some other embodiments, the tube 2 is not limited to a quartz tube, but may be other light wave-transmitting window materials such as infrared light-transmitting glass, transparent ceramics, or diamond. 【0033】 In some embodiments, the tube 2 is hollow and tubular, with two ends distributed along the axial direction. Specifically, the tube 2 includes a first portion 21 and a second portion 22 distributed along its axial direction, a closed end 23 adjacent to the first portion 21, and an open end 24 adjacent to the second portion 22, and the heating element 1 enters the tube 2 from the open end 24 and is in contact with or separated from the closed end 23. Preferably, the length of the first portion 21 is greater than or equal to the length of the second portion 22, the length range of the first portion 21 is 5 mm to 12 mm (including 5 mm and 12 mm), the length range of the second portion 22 is 4 mm to 10 mm (including 4 mm and 10 mm), or the ratio of the length of the first portion 21 to the length of the second portion 22 is 1 or more and 2 or less. Since the heating element 11 is close to the closed end 23 and the conductive part 12 is close to the open end 24, when current is applied to the heating element 1, the first part 21 is heated to a higher temperature than the second part 22. It should be understood that the second part 22 can cover a portion of the end of the heating element 11 that is close to the conductive part 12, or the first part 21 can cover a portion of the end of the conductive part 12 that is close to the heating element 11. 【0034】 In some embodiments, the wall of the tube 2 is positioned at a distance from the entire heating element 1, for example, a gap is provided between the tube 2 and the heating element 1, and this gap can be filled with air. Of course, it should be understood that in some other embodiments, this gap can also be filled with a reducing gas or an inert gas. By providing a gap, the tube 2 and the heating element 1 can be prevented from coming into direct contact. In some embodiments, the heating element 1 can also be positioned at a partial distance from the wall of the tube 2. Specifically, the radial dimension of some segments of the heating element 11 may be larger than the radial dimension of other segments, and the radial dimension of some segments of the heating element 11 may be equal to the inner diameter of the tube 2. This can serve as a positional limit. Of course, it should be understood that in some embodiments, a portion of the inside of the tube 2 can protrude toward the heating element 1 and come into contact with it, thereby serving as a positional limit. Of course, in some other embodiments, it should be understood that isolation positioning structures may be provided on the heating element 1 or the wall of the tube 2, such as a ceramic ring fitted to a portion of the heating element 1, so that the heating element 1 and the wall of the tube 2 do not come into direct contact. The gap mentioned above can refer to a gap into which air can enter, but it does not necessarily mean that air or other gases are present; a vacuum state is also a form of gap. In order to obtain a better suction response and extend the service life of the heating element, the tube 2 may be installed with a vacuum structure or with its open end sealed. 【0035】 By setting the thickness of the tube wall and the distance between the heating element 1 and the tube 2, the temperature at which the entire heating structure heats the aerosol-forming matrix 200 can be set. At the same temperature, the overall irradiance tends to decrease as the thickness of the tube wall increases. In some embodiments, the thickness of the tube wall of the tube 2 may be 0.15 mm to 0.6 mm (including 0.15 mm and 0.6 mm). In some embodiments, the temperature of the heating structure tends to gradually decrease as the distance between the heating element 1 and the tube wall increases. Preferably, in some embodiments, the distance between the tube wall of the tube 2 and the heating element 1 may be 0.05 mm to 1 mm (including 0.05 mm and 1 mm). 【0036】 In some embodiments, after the aerosol generator is started, the heating element 1 can be rapidly heated to its operating temperature. In this application, "operating temperature" refers to the temperature of the heating element 1 itself when it is heating the aerosol-forming matrix 200, and in particular, this operating temperature refers to the temperature of the heating element 1 itself when it is exciting the infrared light emission layer 14 and emitting infrared light. This operating temperature is not actually unique and may be related to factors such as the length of inhalation time, the frequency of inhalation during the same time period, and the type of aerosol-forming matrix 200. Specifically, the operating temperature range of the heating element 11 is 500°C to 1200°C (including 500°C and 1200°C), which is advantageous for rapidly generating aerosols when inhalation begins. That is, throughout the entire operating period, the operating temperature of the heating element 1 can be any temperature between 500°C and 1200°C, and specifically, it can be set according to the requirements for temperature control. The average operating temperature of the heating element 11 is 600°C to 800°C (including 600°C and 800°C), which is advantageous for generating infrared light emission with a wavelength in the range of approximately 2 to 4.75 μm to heat the aerosol-forming matrix and achieve effective atomization of the main components of the aerosol-forming matrix. The operating temperature range of the conductive element 12 is 150°C to 450°C (including 150°C and 450°C), with an average operating temperature of less than 300°C, which is advantageous for preventing the circuit board to which the lead wires are connected from generating excessive heat, thus preventing the risk of overheating and failure or shortened lifespan of components on the circuit board. The operating temperature of the first part 21 is 350°C to 550°C (including 350°C and 550°C), with an average operating temperature of 280°C to 370°C (including 280°C and 370°C). The maximum operating temperature of the second part 22 is 250°C or less, with an average operating temperature of less than 200°C. 【0037】 Preferably, the heating element 11 is a heating wire made of a high-temperature resistant alloy material such as iron-chromium-aluminum alloy or iron-chromium alloy. The conductive element 12 is a lead wire made of a material with low electrical resistivity such as nickel, silver, copper, or aluminum. The heating element 11 and the conductive element 12 are connected by welding, and a connection part 13 is formed between them, with the diameter of the connection part 13 being larger than the diameter of the conductive element 12. The connection part 13 is located below the aerosol-forming matrix, and preferably, the connection part 13 is located below the end face of the aerosol-forming matrix. Because the conductive element 12 is an electrode material with low electrical resistivity, when the magnitude of the current flowing is the same, the temperature of the conductive element 12 will be lower than the temperature of the heating element 11. 【0038】 In some embodiments, the heating element 11 includes a plurality of sequentially connected helical segments 11a, which are connected sequentially. The length of the helical segments 11a is 5 mm to 12 mm (including 5 mm and 12 mm), and the gap between the helical segments 11a and the inner wall of the tube 2 is 0.05 mm to 0.5 mm (including 0.05 mm and 0.5 mm). In some embodiments, the heating element 11 is provided with a top end and a pin end at both ends, the pin end being electrically connected to the conductive part 12, and the top end being in contact with or spaced apart from the inner wall of the closed end, with at least some of the helical segments 11a having a higher temperature than the top end and the pin end. In this embodiment, the radial dimensions of each helical segment 11a are set to be equal. In some other embodiments, the radial dimensions of each helical segment 11a are not perfectly equal or are completely unequal. By adjusting the radial dimensions of the helical segments 11a, the temperature field of the entire heating structure can be arranged. In this embodiment, the diameter of the heating element 1 can be 0.05 mm to 0.7 mm (including 0.05 mm and 0.7 mm). In some other embodiments, the radial dimension of some of the helical segments 11a among the plurality of helical segments 11a can be larger than the radial dimension of some of the other helical segments 11a among the plurality of helical segments 11a. For example, the plurality of helical segments 11a can be arranged such that the radial dimension of the helical segment 11a located in or near the center is larger than the radial dimension of the helical segments 11a located at or near both ends, or the plurality of helical segments 11a can be arranged such that the radial dimension of the helical segment 11a located in or near the center is smaller than the radial dimension of the helical segments 11a located at or near both ends. 【0039】 Figure 5 shows a first embodiment of the heat-generating section 11 according to the present invention. The plurality of helical segments 11a are distributed at equal intervals, and a first high-temperature region is formed in the central 2 mm to 5 mm of the heat-generating section 11, with an operating temperature range of 550°C to 1200°C. A second high-temperature region is formed in the remaining areas at both ends of the heat-generating section 11, with an operating temperature range of 500°C to 900°C. 【0040】 Of course, it should be understood that in some other embodiments, the plurality of helical segments 11a are not limited to being distributed at equal intervals. The plurality of helical segments 11a can form dense segments with a length of 2 mm to 8 mm (including 2 mm and 8 mm) and a pitch of 0.05 mm to 0.7 mm (including 0.05 mm and 0.7 mm), and sparse segments with a length of 2 mm to 8 mm (including 2 mm and 8 mm) and a pitch of 0.6 mm to 1.5 mm (including 0.6 mm and 1.5 mm). The dense segments constitute a first high-temperature region, with a temperature range of 550°C to 1200°C (including 550°C and 1200°C); the sparse segments constitute a second high-temperature region, with a temperature range of 500°C to 900°C (including 500°C and 900°C). 【0041】 Figure 6 shows a second embodiment of the heat-generating section 11 according to the present invention. The second embodiment differs from the first embodiment in that the upper half of the helical segment 11a of the heat-generating section 11 forms a dense segment, and the lower half of the helical segment 11a of the heat-generating section 11 forms a sparse segment. 【0042】 Figure 7 shows a third embodiment of the heat-generating section 11 according to the present invention. The third embodiment differs from the first embodiment in that the upper half of the helical segment 11a of the heat-generating section 11 forms a sparse segment, and the lower half of the helical segment 11a of the heat-generating section 11 forms a dense segment. 【0043】 Figure 8 shows a fourth embodiment of the heat-generating section 11 according to the present invention. The fourth embodiment differs from the first embodiment in that the helical segment 11a in the central part of the heat-generating section 11 forms a dense segment, and the remaining helical segments 11a at both ends of the heat-generating section 11 form a sparse segment. 【0044】 Figure 9 shows a fifth embodiment of the heat-generating section 11 according to the present invention. The fifth embodiment differs from the first embodiment in that the central portion of the heat-generating section 11 forms a sparse segment, while the remaining helical segments 11a at both ends of the heat-generating section 11 form a dense segment. 【0045】 Figure 10 shows a fifth embodiment of the heat-generating section 11 according to the present invention. The fifth embodiment differs from the first embodiment in that the helical segment 11a of the heat-generating section 11 is formed by alternately distributing a plurality of dense segments and sparse segments. 【0046】 The pitch of the multiple helical segments 11a may change uniformly from dense to sparse from top to bottom, or from the center to both ends, so it should be understood that the temperature of the heating element 11 changes with a uniform gradient from top to bottom or from the center to both ends. 【0047】 For heating elements made of the same material and with a uniform diameter, the overall temperature field distribution can be controlled by adjusting the spacing between the helical segments 11a. That is, by forming different first and second high-temperature regions and arranging the overall temperature field of the heating section 11, different atomization amounts and suction response can be generated when the aerosol-forming matrix begins to draw air. The overall temperature field distribution is related to the density of the multiple helical segments 11a, and different winding methods with varying degrees of density of the helical segments 11a can be selected depending on the requirements for the temperature field distribution in the heating process of the entire aerosol-forming matrix and the combustion state. 【0048】 Generally, the smaller the pitch, the greater the heat generated for the same length, resulting in a higher temperature and stronger infrared radiation. However, at both ends, the heat dissipation area is larger than in the center, so the temperature is lower for the same pitch. To achieve overall temperature uniformity, it is necessary to reduce the pitch at both ends and increase the pitch in the center. However, the atomization effect of the aerosol-forming matrix is ​​not necessarily optimal in a uniform temperature field, and the effects of airflow and other factors must also be considered. Therefore, different helical structures can be installed to control the temperature field. 【0049】 Of course, in some other embodiments, the overall temperature field distribution can also be controlled by controlling the electrical resistance, and this control can be achieved by selecting the material of the heating element 1 or by controlling different diameters, that is, it should be understood that the heating element 1 of the corresponding material and corresponding diameter can be selected as needed. Preferably, the electrical resistivity is 0.8 Ωmm 2 / m~1.6Ωmm 2 / m(0.8Ωmm 2 / m and 1.6Ωmm 2 It may also be controlled to include / m. 【0050】 In some embodiments, the heating structure further includes an insulating member 3 provided at least partially on the tube 2 so as to insulate the conductive portion 12, which is drawn out from one end of the insulating member 3 and used to connect to the power supply end. Specifically, the insulating member 3 is provided with a position-limiting hole for inserting the conductive portion 12, and the diameter of this position-limiting hole is smaller than the connection portion 13 so that the conductive portion 12 is confined inside the tube 2. 【0051】 In some embodiments, the heating structure further includes a mounting base 4 that fixes the tube 2 to the aerosol generator, the mounting base 4 being located in the second portion 22. The heating element 1 further includes a mounting base 4 having a distance of 2 mm to 10 mm (including 2 mm and 10 mm) from the connection portion 13. When the heating element 1 is operating, the temperature of the mounting base 4 is less than 200°C, and the temperature transferred from the mounting base 4 to the housing of the aerosol generator is less than 45°C. Preferably, by increasing the distance between the mounting base 4 and the connection portion 13, or by applying an insulating treatment to the mounting base 4, the temperature of the mounting base 4 can be reduced to 100°C or less, and the temperature of the housing of the aerosol generator can be reduced to 38°C or less. 【0052】 This invention eliminates the risk that, when a heating element is directly connected to a circuit board, the heating element's temperature becomes too high, causing heat to be directly transferred to the circuit board, shortening the lifespan of electronic components or causing them to burn out. By installing lead wires in the low-temperature range, the temperature radiated from the circuit board is reduced, avoiding the problem of the circuit board being too hot, and indirectly reducing the temperature of the aerosol generator housing. 【0053】 The above embodiments are merely examples of preferred embodiments of the present invention, and while the description is specific and detailed, it should be understood that it should not be interpreted as limiting the scope of the patent of the present invention. Furthermore, those skilled in the art can freely combine the above-described technical features and make several modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made within the claims of the present invention should also be included within the claims of the present invention.

Claims

[Claim 1] A heating structure comprising a heating element (1) and a tubular body (2), The heating element (1) and the pipe wall of the pipe (2) are installed at least partially separated from each other. The heating element (1) is used to be heated by the application of electricity and emit infrared light, and the infrared light passes through the tube (2) to heat the aerosol-forming matrix. The tube (2) includes a first portion (21) and a second portion (22) distributed along its axial direction, and the first portion (21) and the second portion (22) are arranged such that when the heating element (1) is energized, the first portion (21) is heated to a higher temperature than the second portion (22). A heating structure characterized by the following. [Claim 2] The tube (2) includes a closed end (23) and an open end (24), and the heating element (1) enters the tube (2) from the open end (24) and comes into contact with or is separated from the closed end (23), the first portion (21) is close to the closed end (23) and the second portion (22) is close to the open end (24). The heating structure according to claim 1, characterized in that... [Claim 3] The maximum operating temperature range of the first part (21) is 350 to 550°C, and the maximum operating temperature of the second part (22) is 250°C or less. The heating structure according to claim 2, characterized in that... [Claim 4] The length of the first part (21) is greater than or equal to the length of the second part (22). The heating structure according to claim 3, characterized in that [Claim 5] The length range of the first part (21) is 5 mm to 12 mm, and the length range of the second part (22) is 4 to 10 mm, or The ratio of the length of the first part (21) to the length of the second part (22) is 1 or more and 2 or less. The heating structure according to claim 4, characterized in that... [Claim 6] The heating element (1) is provided in a vertically elongated manner, and includes a heating portion (11) adjacent to the closed end (23) and a conductive portion (12) connected to the heating portion (11), and the ratio of the length of the first portion (21) to the length of the heating portion (11) is 0.8 or more and 1.5 or less. The heating structure according to claim 2, characterized in that... [Claim 7] The maximum operating temperature of the heating element (11) is 500°C to 1200°C, and the maximum operating temperature range of the conductive element (12) is 150°C to 450°C. The heating structure according to claim 6, characterized in that... [Claim 8] The heating element (11) includes at least a plurality of sequentially connected helical segments (11a). The heating structure according to claim 6, characterized in that... [Claim 9] The heating element (11) is provided with a top end and a pin end at both ends, the pin end being electrically connected to the conductive element (12), the top end being positioned in contact with or separated from the inner wall of the closed end (23), and at least some of the helical segments (11a) are at a higher temperature than the top end and the pin end. The heating structure according to claim 8, characterized in that... [Claim 10] The length of the helical segment (11a) is 5 mm to 12 mm, and the gap between the helical segment (11a) and the inner wall of the tube (2) is 0.05 mm to 0.5 mm. The heating structure according to claim 8, characterized in that... [Claim 11] The multiple helical segments (11a) are installed at equal intervals, or they are installed so that sparse and dense intervals alternate. The heating structure according to claim 8, characterized in that... [Claim 12] The heating element (1) further includes a mounting base (4) for fixing the pipe (2), the mounting base (4) being located on the second portion (22), and the heating element (1) further includes a connecting portion (13) connecting the heating portion (11) and the conductive portion (12), the mounting base (4) being located between the open end (24) and the connecting portion (13) in the axial direction of the pipe (2), and being installed spaced apart from the connecting portion (13). The heating structure according to claim 6, characterized in that... [Claim 13] The distance between the connecting portion (13) and the mounting base (4) is 2 mm to 10 mm. The heating structure according to claim 12, characterized in that [Claim 14] The second portion (22) covers a part of the end of the heating portion (11) that is close to the conductive portion (12). The heating structure according to claim 6, characterized in that... [Claim 15] The first portion (21) covers a part of the end of the conductive portion (12) that is close to the heat-generating portion (11). The heating structure according to claim 6, characterized in that... [Claim 16] The tube (2) is used to be inserted at least partially into the aerosol-forming matrix, and the infrared light generated by the heating element passes through the tube (2) to heat the aerosol-forming matrix. The heating structure according to claim 1, characterized in that... [Claim 17] The heating element (1) comprises a heating substrate and an infrared light emitting layer (14) provided on the outer surface of the heating substrate. The heating substrate is heated by an electric current to excite the infrared light emitting layer (14) and emit infrared light. The heating structure according to claim 1, characterized in that... [Claim 18] A heating structure according to any one of claims 1 to 17, Includes a power supply assembly that supplies power to the heat-generating structure. An aerosol generator characterized by the following.

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