Aerosol generating system and aerosol generating substrate

Abstract

An aerosol generating system and an aerosol generating substrate (2). The aerosol generating system comprises: an aerosol generating device (1), the aerosol generating device (1) comprising a housing and a heating body (3), an accommodation tube and a power supply device which are accommodated in the housing, the accommodation tube being provided with an accommodation space, the heating body (3) being at least partially provided in the accommodation space, and the power supply device being connected to the heating body (3) so as to provide electric energy for the heating body (3); and an aerosol generating substrate (2) inserted into the accommodation space, at least part of the heating body (3) being inserted into the aerosol generating substrate (2), and the at least part of the heating body (3) located in the aerosol generating substrate (2) and the aerosol generating substrate (2) having a gap in the radial direction.

Description

An aerosol generating system and an aerosol generating matrix

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202323174595.6 and application date of November 22, 2023, and claims the priority of the above-mentioned Chinese patent application. The entire content of the above-mentioned Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application belongs to the field of atomization technology, and more specifically, relates to an aerosol generating system and an aerosol generating matrix. Background Art

[0004] In the field of heat-not-burn atomization, heating methods such as central heating element heating or peripheral heating element heating are generally used. The usual practice is that the heating element generates heat, which is then directly transferred to the aerosol-generating matrix through heat conduction. The aerosol-generating matrix generally produces aerosol within 350°C. The disadvantage of this heating method is that the heating element directly conducts heat to the aerosol-generating matrix and other media, resulting in relatively low heating efficiency and slow smoke production. If the heating temperature of the heating element is increased to increase the smoke production speed, the aerosol-generating matrix is ​​prone to carbonization, affecting the taste of the puff. In addition, it is prone to problems such as the aerosol-generating matrix falling off and the heating element being difficult to clean.

[0005] Summary of the Invention

[0006] In view of this, the present application provides an aerosol generating system and an aerosol generating substrate to solve the technical problem of how to reduce the difficulty of cleaning the heating element.

[0007] The technical solution of this application is achieved as follows:

[0008] An embodiment of the present application provides an aerosol generating system, comprising: an aerosol generating device, the aerosol generating device comprising a shell and a heating element, a receiving tube and a power supply device housed in the shell, the receiving tube being provided with a receiving space, the heating element being at least partially disposed in the receiving space; the power supply being connected to the heating element to provide electrical energy to the heating element; an aerosol generating matrix being inserted in the receiving space, the heating element being at least partially inserted into the aerosol generating matrix, and a radial gap being at least partially formed between the heating element located in the aerosol generating matrix and the aerosol generating matrix.

[0009] In some embodiments, the aerosol generating substrate is at least partially hollow to form a heating cavity, and the heating element is at least partially disposed in the heating cavity and spaced apart from an inner wall of the heating cavity.

[0010] In some embodiments, the heating element is coaxially arranged with the heating chamber.

[0011] In some embodiments, the aerosol generating substrate comprises a mouthpiece portion, a cooling portion, and a medium portion connected in sequence, and the heating chamber is arranged in the medium portion along the length direction of the aerosol generating substrate.

[0012] In some embodiments, the mouthpiece portion is located downstream of the aerosol generating substrate, the medium portion is located upstream of the aerosol generating substrate, the cooling portion is located between the mouthpiece portion and the medium portion, and the cooling portion is configured to cool the aerosol generated by heating the medium portion.

[0013] In some embodiments, the aerosol generating substrate further includes a supporting portion, which is disposed between the cooling portion and the medium portion and supports the medium portion.

[0014] In some embodiments, the medium portion is configured as an integral sheet rolled into a cylindrical structure, a dense powder structure, or a particle-pressed cylindrical structure.

[0015] In some embodiments, the distance between the inner wall of the heating chamber and the surface of the heating element is 0.1 mm-1.5 mm; and / or the radial dimension of the heating chamber is larger than the radial dimension of the heating element.

[0016] In some embodiments, the aerosol-generating substrate has a draw resistance of 0.1 kPa to 0.3 kPa.

[0017] In some embodiments, the heating element is an infrared heating element with a sheet-like, needle-like, column-like or tubular structure.

[0018] In some embodiments, the heating chamber is a cylindrical chamber or an annular chamber.

[0019] In some embodiments, when the medium portion is configured as a whole sheet rolled into a cylindrical structure, the density of the medium portion is greater than or equal to 200 mg / cm 3 And less than or equal to 500mg / cm 3 Or, in the case where the medium portion is set as a dense powder or granular pressed cylindrical structure, the density of the medium portion is less than or equal to 1500 mg / cm 3 .

[0020] In some embodiments, the length of the medium portion is greater than or equal to 1 cm and less than or equal to 5 cm; and / or the outer diameter of the medium portion is greater than or equal to 0.5 cm and less than or equal to 1 cm.

[0021] In some embodiments, when the medium portion is configured as a compacted powder or granular pressed cylindrical structure, the density of the medium portion is greater than or equal to 1000 mg / cm3 And less than or equal to 1500mg / cm 3 .

[0022] In some embodiments, the content of the atomizer in the medium portion is 9%-11.5%; and / or the content of water in the medium portion is 6%-12%.

[0023] An embodiment of the present application also provides an aerosol generating matrix, which includes a mouthpiece portion, a cooling portion, and a medium portion connected in sequence. The interior of the medium portion is hollow to form a heating cavity. The heating cavity is configured to allow a heating element to pass through, and the surface of the heating element is spaced apart from the inner wall of the heating cavity.

[0024] In some embodiments, the medium portion is configured as a whole sheet curled into a cylindrical structure, a dense powder structure, or a granular pressed cylindrical structure; when the medium portion is configured as a whole sheet curled into a cylindrical structure, the density of the medium portion is greater than or equal to 200 mg / cm 3 And less than or equal to 500mg / cm 3 Or, in the case where the medium portion is set as a dense powder or granular pressed cylindrical structure, the density of the medium portion is less than or equal to 1500 mg / cm 3 .

[0025] In some embodiments, when the medium portion is configured as a compacted powder or granular pressed cylindrical structure, the density of the medium portion is greater than or equal to 1000 mg / cm 3 And less than or equal to 1500mg / cm 3 .

[0026] In some embodiments, the suction resistance of the medium portion is 0.1 kPa-0.3 kPa; and / or the length of the medium portion is greater than or equal to 1 cm and less than or equal to 5 cm; and / or the outer diameter of the medium portion is greater than or equal to 0.5 cm and less than or equal to 1 cm; and / or the atomizer content in the medium portion is 9%-11.5%; and / or the moisture content in the medium portion is 6%-12%.

[0027] The embodiment of the present application provides an aerosol generating system and an aerosol generating substrate, the aerosol generating system including an aerosol generating device and an aerosol generating substrate, the aerosol generating device including a shell and a heating element housed in the shell, a housing tube and a power supply device, the housing tube is provided with a housing space, the heating element is at least partially arranged in the housing space, the power supply device is connected to the heating element to provide electrical energy to the heating element, the aerosol generating substrate is inserted in the housing space, the heating element is at least partially inserted into the aerosol generating substrate, and the heating element located in the aerosol generating substrate has a radial gap with the aerosol generating substrate. The embodiment of the present application separates at least part of the aerosol generating substrate from the surface of the heating element in the radial direction, so that the heating element is not in direct contact with the aerosol generating substrate, that is, the heating element and the aerosol generating substrate are heated indirectly (air heat conduction and / or infrared radiation) rather than directly in contact, thereby avoiding the phenomenon of the aerosol generating substrate being burnt due to the increase in the smoke output speed. In addition, there is a certain gap between the heating element and the aerosol generating matrix, which is beneficial to improving the smoothness of the airflow channel inside the aerosol generating matrix and reducing the cleaning requirements of the heating element. On the basis of avoiding carbonization and debris, it does not affect the smoothness of the medium airway, the cigarette suction resistance, the medium smoke volume and the smoking rate, thereby improving the atomization effect of the aerosol generating system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG1 is a schematic structural diagram of an aerosol generating system according to an embodiment of the present application;

[0029] FIG2 is a schematic structural diagram of an aerosol generating substrate according to an embodiment of the present application;

[0030] FIG3 is a schematic structural diagram of a matrix portion according to an embodiment of the present application;

[0031] FIG4 is a cross-sectional view of the aerosol generating substrate and the heating element according to the first embodiment of the present application;

[0032] FIG5 is a cross-sectional view of the aerosol generating substrate and the heating element according to the second embodiment of the present application.

[0033] Description of reference numerals:

[0034] 1. Aerosol generating device; 2. Aerosol generating matrix; 21. Heating chamber; 22. Inner wall; 23. Mouthpiece; 24. Cooling part; 25. Support part; 26. Medium part; 3. Heating element. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not configured to limit this application.

[0036] The various specific technical features described in the specific embodiments may be combined in any suitable manner, unless they are inconsistent. For example, different embodiments and technical solutions may be formed by combining different specific technical features. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this application will not be described separately.

[0037] In the following description, the terms "first, second, ..." are used solely to distinguish different objects and do not imply any similarities or connections between the objects. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to directions during normal use. The directions "left" and "right" refer to the left-right directions shown in the corresponding schematic diagrams, which may or may not be the left-right directions during normal use.

[0038] It should be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element. "A plurality" means greater than or equal to two.

[0039] The aerosol generating matrix in the embodiment of the present application should be configured as a heat-not-burn (HNB) atomization field. As shown in Figures 1 to 3, the aerosol generating system includes an aerosol generating device 1 and an aerosol generating matrix 2. The aerosol generating device 1 includes a shell and a heating element 3 accommodated in the shell, a receiving tube and a power supply device, and the receiving tube is provided with a receiving space. The power supply device is connected to the heating element 3, and the power supply device is configured to provide electrical energy to the heating element 3. The power supply device may include a main control board and a battery, the battery is connected to the main control board, the main control board is connected to the heating element 3, the battery is configured to provide electrical energy to the heating element 3, and the heating element is at least partially arranged in the receiving space. The heating element 3 converts electrical energy into thermal energy to heat the aerosol generating matrix 2.

[0040] As shown in Figures 1 and 2, the aerosol generating matrix 2 is inserted into the receiving space of the receiving tube, the heating element 3 is at least partially inserted into the aerosol generating matrix 2, and the heating element 3 located in the aerosol generating matrix 2 is at least partially spaced apart from the aerosol generating matrix 2 in the radial direction. It should be noted that the axial direction of the aerosol generating matrix 2 represents the length direction of the aerosol generating matrix 2, and the length direction is in the up and down direction shown on the paper of Figure 2. The radial direction of the aerosol generating matrix 2 represents the diameter direction in the cross section perpendicular to the axial direction, and the radial direction can refer to the left and right direction shown on the paper of Figure 2. It should be noted that the embodiment of the present application does not limit the cross-sectional shape of the aerosol generating matrix 2, and the cross-sectional shape can be square, circular, elliptical, etc., and the direction of the diameter can represent the direction of a straight line passing through the midpoint in any cross section in the direction of the vertical axis. The radial gap between at least part of the aerosol generating matrix 2 and the heating element 3 described in the embodiment of the present application means that a part of the heating element 3 is inserted into the aerosol generating matrix 2, and the other part of the heating element 3 is arranged in the shell of the aerosol generating device. At least part of the heating element 3 arranged in the aerosol generating matrix 2 can be spaced apart from the aerosol generating matrix 2, while part is not spaced apart; or, all the heating elements 3 arranged in the aerosol generating matrix 2 are spaced apart from the aerosol generating matrix 2. The at least partial spacing described in the embodiment of the present application means that as long as part of the heating element 3 is spaced apart from the aerosol generating matrix 2, it is sufficient. The spacing means that the heating element 3 is not in contact with the aerosol generating matrix 2, and there is no physical component blocking the two.

[0041] Existing heat-not-burn cigarettes (HNBs) heat tobacco to approximately 200-350°C without burning it, producing an aerosol for inhalation. Because there's no high-temperature combustion, the flameless smoking method avoids the release of harmful compounds through high-temperature cracking. While HNBs release nicotine and other chemicals, the harmful substances in their aerosol are far lower than those in traditional cigarettes.

[0042] HNB cannot be directly ignited and smoked; it can only be smoked by heating tobacco through a specific electronic device. The electronic device can be configured to smoke traditional cigarettes or use designated heated tobacco products. HNB uses a heating element to heat the cigarette, evaporating its flavor compounds, to achieve a similar experience to smoking traditional cigarettes.

[0043] The related heat-not-burn method uses a central heating element for atomization. The central heating element is an infrared heating element, including light wave infrared, plasma infrared heating elements, etc. Since the maximum temperature inside the heating element can reach more than 500 degrees, or even as high as 1000 degrees, in order to pursue rapid smoke output, the maximum temperature on the surface of the heating element may reach more than 400 degrees. If the heating element is in direct contact with the aerosol generating matrix, it is easy to cause the cigarette to burn and produce odor, affecting the smoking taste; in addition, during heating, since the heating element is in contact with the aerosol generating matrix, it will also cause dirt to deposit or stick on the surface of the heating element. Therefore, the heating element needs to be cleaned frequently, which is inconvenient for the user's subsequent use, and it will affect the heating device if it is not cleaned for a long time.

[0044] The aerosol generating matrix in the related technology is in direct contact with the heating element without a radial gap. That is to say, the heating element will directly transfer heat to the aerosol generating matrix. The aerosol generating matrix will produce condensation during the atomization process. The medium in the aerosol generating matrix is ​​easy to stick to the surface of the heating element. The high surface temperature of the heating element will cause the medium to carbonize and fall off. The heating element is not easy to clean and the medium is easy to burn, which affects the taste and amount of smoke.

[0045] In the embodiment of the present application, a radial gap is created between at least part of the aerosol generating matrix and the heating element, so that the heating element is not in direct contact with the aerosol generating matrix. In other words, the heating element and the aerosol generating matrix are heated indirectly rather than directly. Under the premise of rapid smoke output (for example, smoke output within 3 seconds, while the conventional technology generally takes more than 10 seconds to output smoke), the phenomenon of smoke stains sticking to the heating element and falling off can be avoided. In addition, there is a certain gap between the heating element and the aerosol generating matrix, which is conducive to improving the smoothness of the airflow channel within the aerosol generating matrix. On the basis of avoiding carbonization and falling off, it does not affect the smoothness of the medium airway, the cigarette draw resistance, the medium smoke volume and the smoking rate, and is conducive to reducing the cleaning requirements of the heating element.

[0046] The following is an example of an infrared light wave radiation heating form in which the heating element is set to heat. The outer layer of the heating element is provided with an infrared radiation layer, and the interior of the heating element is a heating substrate. The heating substrate is configured to excite the infrared radiation layer to radiate infrared light waves, so that the infrared light waves are radiated through the infrared radiation layer to utilize the infrared light waves to heat the aerosol generating matrix. Since there is a gap between the heating element and the inner wall of the aerosol generating matrix, during the heating process, in order to pursue rapid smoke discharge, the temperature of the heating element will generally be relatively high during the preheating stage of the aerosol generating matrix, especially for light wave infrared and plasma heating elements. The internal temperature of the heating element can be as high as 800 degrees or more, and the maximum temperature of the surface of the heating element can be as high as about 500 degrees. Due to the existence of the gap between the aerosol generating matrix and the heating element, the direct heat conduction of the heating element is reduced, and it is not easy to burn, but it can also meet the needs of rapid smoke discharge.

[0047] Specifically, after the aerosol generating device 1 is started, the heating element can be heated to above 1000°C in about 1-3 seconds, that is, the first puff can be taken in about 1 second. The rapid heating and rapid heating of the medium reduce waiting time, and basically achieve the condition of inserting a cigarette and then smoking, greatly improving the consumer experience. In addition, such rapid heating, and the temperature is as high as 1000 degrees Celsius, and the temperature of the surface of the heating element can also reach 400-500 degrees, but the aerosol generating matrix will not be burned and affect the taste. On the contrary, the taste is improved, solving the contradiction between the high temperature operation of the heating element that easily causes the aerosol generating matrix to burn and the need to improve the smoking taste. Even if the temperature of the outer layer is higher than the heating temperature of the prior art, the aerosol generating matrix will not be burned and affect the taste through indirect heating. It can improve the atomization efficiency of the aerosol generating matrix, while achieving rapid smoke output and a large amount of smoke in the first puff. It can also reduce the risk of carbonization and slag of the aerosol generating matrix, reduce the need for cleaning the heating element, and improve the quality of the aerosol generating system.

[0048] An embodiment of the present application provides an aerosol generating system, which includes an aerosol generating device and an aerosol generating matrix. The aerosol generating device includes a shell and a heating element housed in the shell, a housing tube, and a power supply device. The housing tube is provided with a housing space. The power supply device is connected to the heating element to provide electrical energy to the heating element. The aerosol generating matrix is ​​inserted into the housing space. The heating element is at least partially inserted into the aerosol generating matrix, and there is a radial gap between at least part of the heating element located in the aerosol generating matrix and the aerosol generating matrix. In the embodiment of the present application, the aerosol generating matrix is ​​at least partially spaced apart from the heating element in the radial direction, so that the heating element is not in direct contact with the aerosol generating matrix. That is, the heating element and the aerosol generating matrix are heated indirectly rather than directly in contact, thereby avoiding the phenomenon of the heating element sticking and the slag falling off. In addition, there is a certain gap between the heating element and the aerosol generating matrix, which is beneficial to improving the smoothness of the airflow channel inside the aerosol generating matrix and reducing the cleaning requirements of the heating element. While avoiding carbonization and debris, it does not affect the smoothness of the medium airway, the cigarette suction resistance, the medium smoke volume and the smoking rate.

[0049] In some embodiments, as shown in Figure 2, the aerosol generating matrix 2 is at least partially hollow inside to form a heating chamber 21, and the aerosol generating matrix 2 has relative inner and outer walls, wherein the inner wall 22 encloses the heating chamber 21, and the outer wall is away from the heating chamber 21 relative to the inner wall 22. The heating element 3 is at least partially arranged in the heating chamber 21, and the heating element 3 arranged in the heating chamber 21 is spaced apart from the inner wall 22 of the aerosol generating matrix 2. The spacing means that the outer surface of the heating element 3 and the inner wall 22 of the aerosol generating matrix 2 are not in contact with each other. The heating chamber 21 is arranged inside the aerosol generating matrix 2 in the embodiment of the present application, and the processing method is simple and easy to manufacture. While satisfying the condition that the heating element 3 and the aerosol generating matrix 2 are not in contact with each other, the processing efficiency of the aerosol generating matrix can be improved.

[0050] In some embodiments, as shown in FIG2 , the heating element 3 is coaxially arranged with the heating chamber 21. The embodiment of the present application does not limit the contour shape of the heating element 3. For example, the heating element 3 may be cylindrical, sheet-like, needle-like, etc. The embodiment of the present application also does not limit the cross-sectional shape of the heating chamber 21. The area of ​​each cross section of the heating chamber 21 in the height direction (the up and down direction shown in FIG2 ) may be equal or unequal. The heating element 3 and the heating chamber 21 being coaxial means that the axis of the heating element 3 coincides with the axis of the heating chamber 21. It can also be understood that when the heating element 3 is set as a cylinder with a regular outer contour, and the heating chamber 21 is also set as a cylindrical cavity, the two axes coincide, then the distance from each position of the outer surface of the heating element 3 to the inner wall 22 of the heating chamber 21 is equal, so that each position of the aerosol generating matrix 2 is heated evenly, avoiding the risk of local overheating, so as to further reduce the risk of excessive carbonization and slagging of the aerosol generating matrix.

[0051] The heating element in the embodiments of the present application can be configured as a sheet, needle, column, or cylindrical structure, and the heating cavity can be configured as a cylindrical cavity or an annular cavity. It should be noted that the type of heating element configuration is related to the type of heating cavity configuration. For example, if the heating cavity is configured as a cylindrical cavity, the heating element can be configured as a sheet, needle, or columnar structure; if the heating cavity is configured as an annular cavity, the heating element can be configured as a cylindrical structure.

[0052] Referring to Figures 4 and 5, Figure 4 shows a cross-sectional view of the heating chamber 21 being set as an annular chamber and the heating element 3 being set as a cylindrical structure. Figure 5 shows a cross-sectional view of the heating chamber 21 being set as a columnar chamber and the heating element 3 being set as a columnar structure. Referring to Figure 4, when the heating chamber 21 is set as an annular structure, both the inner and outer sides of the heating element 3 are spaced apart from the heating chamber, and do not contact the wall surface that encloses the heating chamber. In this case, the heating element has a better heating effect on the aerosol generating matrix and a higher heating efficiency. Referring to Figure 5, when the heating chamber 21 is set as a columnar chamber, the outer wall of the heating element 3 is spaced apart from the inner wall of the heating chamber 21.

[0053] It should be noted that no matter what form the heating chamber and the heating chamber are set in, it is sufficient as long as the heating element can be set apart from the wall forming the heating chamber.

[0054] In some embodiments, as shown in FIG2 , the aerosol-generating substrate 2 includes a mouthpiece portion 23, a cooling portion 24, and a medium portion 26, which are sequentially connected. The heating chamber 21 extends through the length of the medium portion 26. The mouthpiece portion 23 is located downstream of the aerosol-generating substrate 2, the medium portion 26 is located upstream of the aerosol-generating substrate 2, and the cooling portion 24 is located between the mouthpiece portion 23 and the medium portion 26.

[0055] The medium portion 26 may include an aerosol-forming substrate that can be heated to generate an aerosol. For example, a heating element 3 is inserted into the heating chamber of the medium portion 26 to generate heat and generate an aerosol. "Upstream" refers to the direction away from the smoker's mouth when the aerosol generating system is in use, while "downstream" refers to the direction toward the smoker's mouth when the aerosol generating system is in use. The terms "upstream" and "downstream" refer to the relative positions of various parts of the aerosol-generating substrate, not absolute directions.

[0056] In some embodiments, the aerosol-generating substrate 2 further includes a support portion 25, which is disposed between the cooling portion 24 and the medium portion 26. The cooling portion 24 is located upstream of the mouthpiece portion 23, and downstream of the support portion 25. The support portion 25 is located downstream of the medium portion 26, and upstream of the cooling portion 24. The support portion 25 supports the medium portion 26. The cooling portion 24 cools the high-temperature aerosol generated by the heating of the medium portion 26, allowing the user to inhale an aerosol of appropriate temperature, allowing mainstream smoke to be smoothly aerosolized, thereby increasing the amount of atomization.

[0057] In the embodiment of the present application, the heating chamber 21 is arranged to pass through the length direction of the medium part 26. During the heating process, the heating chamber 21 can introduce a part of the airflow to adjust the suction resistance of the medium part 26, and can also avoid the phenomenon of sticking to the heating element and falling off. This is beneficial to improving the smoothness of the airflow channel inside the aerosol generating matrix while reducing the cleaning requirements of the heating element. On the basis of avoiding carbonization and falling off, it does not affect the smoothness of the medium airway, the suction resistance of the cigarette, the medium smoke volume and the smoking rate.

[0058] It can avoid the phenomenon of sticking to the heating element and falling off, which is beneficial to improving the smoothness of the air flow channel inside the aerosol generating matrix while reducing the cleaning requirements of the heating element. On the basis of avoiding carbonization and falling off, it does not affect the smoothness of the medium airway, the inhalation resistance of the cigarette, the medium smoke volume and the smoking rate.

[0059] In some embodiments, in conjunction with Figures 2 and 3, the medium portion 26 is configured to be a whole sheet curled into a cylindrical structure, a dense powder structure or a particle pressed cylindrical structure. The medium portion 26 includes tobacco material, but the processing form of the tobacco material can be various. For example, the medium portion 26 can be configured to be a sheet of reconstructed tobacco sheets, and the sheet of tobacco sheets is curled into a cylindrical structure, and a heating chamber is formed inside. For another example, the medium portion 26 can be configured to be a plurality of tobacco shreds (or tobacco shreds) of finely cut reconstructed tobacco sheets, and the tobacco shreds are densely formed into a cylindrical structure. For another example, the medium portion 26 can also be formed into a cylindrical structure by pressing powdered or granular tobacco, as long as a heating chamber is formed inside the cylindrical structure. It should be noted that the molding method of the medium portion 26 in the embodiment of the present application includes but is not limited to the above-mentioned several embodiments.

[0060] In some embodiments, as shown in Figure 2, the distance L1 between the inner wall 22 of the aerosol generating substrate and the surface of the heating element 3 is 0.1mm-1.5mm. In the embodiment of the present application, the diameter L2 of the heating element is smaller than the diameter of the heating cavity 21 surrounded by the inner wall 22 of the aerosol generating substrate, thereby forming L1, so that the outer side of the heating element is spaced from the inner wall 22 of the aerosol generating substrate. By limiting the range of the distance L1 between the inner wall 22 of the aerosol generating substrate and the surface of the heating element 3, the embodiment of the present application can achieve the spacing between the heating element and the inner wall of the aerosol generating substrate to reduce the risk of excessive carbonization and slagging of the aerosol generating substrate, and will not set the gap too large to further ensure the efficiency of heating the aerosol generating substrate.

[0061] In some embodiments, the aerosol generating matrix has a draw resistance of 0.1kPa-0.3kPa. The embodiments of the present application limit the draw resistance range of the aerosol generating matrix, thereby reducing the risk of sticky heating elements and slag falling due to high-temperature cracking of the medium part, while also increasing the atomization amount of the aerosol generating matrix and improving the user's puffing experience. By using less medium, a larger amount of smoke can be generated, which reduces costs. At the same time, since there is a cavity in the center as an airway, the draw resistance of the aerosol generating matrix in the embodiments of the present application is smaller than that of competing products, making it easier to inhale.

[0062] In some embodiments, as shown in FIG2 , the length L3 of the medium portion 26 is greater than or equal to 1 cm and less than or equal to 5 cm. In some embodiments, the length of the medium portion 26 can be set to 2 cm, 3 cm, 4 cm, etc. Increasing the length of the medium portion is beneficial to increasing the rate at which the medium portion 26 is heated and atomized, thereby increasing the amount of smoke generated by the aerosol-generating matrix.

[0063] In some embodiments, as shown in FIG3 , the outer diameter L4 of the dielectric portion 26 is greater than or equal to 0.5 cm and less than or equal to 1 cm. In some embodiments, the outer diameter L4 of the dielectric portion 26 can be set to 0.6 cm, 0.7 cm, 0.8 cm, 0.9 cm, etc. This outer diameter represents the maximum diameter of the outer contour of the dielectric portion 26. When the dielectric portion 26 is configured as a cylinder, the outer diameter of the dielectric portion 26 is the average value. By limiting the outer diameter range of the dielectric portion in the present embodiment, even if a heating chamber is provided inside the dielectric portion, it is beneficial to maintain the stability of the dielectric portion structure.

[0064] In some embodiments, as shown in FIG2 and FIG3 , when the medium portion 26 is configured as a sheet rolled into a cylindrical structure, the density of the medium portion 26 is greater than or equal to 200 mg / cm 3 And less than or equal to 500mg / cm 3 The curling degree of the medium portion of the sheet-like curled cylindrical structure in the embodiment of the present application is not tight, and a heating chamber is provided in the center of the sheet-like curled cylindrical structure. Therefore, without affecting the medium airway, the cigarette draw resistance, the medium smoke volume and the smoking rate, it is also beneficial to reduce the density of the medium portion.

[0065] In some embodiments, as shown in FIG2 and FIG3 , when the medium portion 26 is configured as a compacted powder or granular pressed cylindrical structure, the density of the medium portion 26 is less than or equal to 1500 mg / cm 3 In some embodiments, the density of the dielectric portion 26 may be set to be greater than or equal to 1000 mg / cm 3 And less than or equal to 1500mg / cm 3 The hollow medium part does not come into contact with the heating element. By setting a certain density range, the requirements of smoke volume and draw resistance are met at the same time. The heating cavity serves as an air inlet channel, which can improve the draw resistance of the medium part. Even if a dense powder or granular cylindrical structure with a higher density is set, it can provide a more comfortable draw resistance range. In addition, the higher density of the medium part is conducive to increasing the amount of smoke generated by the aerosol generating matrix, thereby improving the user experience.

[0066] In some embodiments, the aerosol content in the medium portion is 9%-11.5%. The moisture content in the medium portion is 6%-12%. By limiting the aerosol and moisture content in the medium portion to a certain range, the embodiments of the present application can ensure the atomization volume and smoke emission rate of the medium portion, thereby improving the user's puffing experience.

[0067] The embodiment of the present application also provides an aerosol generating matrix, which includes a mouthpiece portion, a cooling portion, a support portion, and a medium portion connected in sequence. The interior of the medium portion is hollow to form a heating cavity, which is configured to allow the heating element to pass through, and the heating element and the medium portion are spaced apart. The medium portion is a whole sheet curled into a cylindrical structure, a dense powder structure, or a granular pressed cylindrical structure. The embodiment of the present application forms a heating cavity by making the interior of the medium portion hollow. The heating element is not in direct contact with the aerosol generating matrix. In other words, the heating element and the aerosol generating matrix are heated indirectly rather than directly in contact, avoiding the phenomenon of sticking to the heating element and falling off due to high-temperature decomposition of the aerosol generating matrix by the heating element. In addition, there is a certain gap between the heating element and the aerosol generating matrix, which is conducive to improving the smoothness of the airflow channel inside the aerosol generating matrix and reducing the need to clean the heating element. On the basis of avoiding carbonization and falling off, it does not affect the smoothness of the medium airway, the draw resistance of the cigarette, the medium smoke volume, and the smoking rate.

[0068] In some embodiments, the suction resistance of the dielectric portion is 0.1 kPa-0.3 kPa;

[0069] and / or, the length of the medium portion is greater than or equal to 1 cm and less than or equal to 5 cm;

[0070] and / or, the outer diameter of the dielectric portion is greater than or equal to 0.5 cm and less than or equal to 1 cm;

[0071] and / or, when the dielectric portion is configured as an integral sheet curled into a cylindrical structure, the density of the dielectric portion is greater than or equal to 200 mg / cm3 and less than or equal to 500 mg / cm3;

[0072] And / or, when the medium portion is configured as a dense powder or granular pressed cylindrical structure, the density of the medium portion is greater than or equal to 1000 mg / cm3 and less than or equal to 1500 mg / cm3.

[0073] In some embodiments, the aerosol content in the medium portion is 9%-11.5%;

[0074] And / or, the moisture content in the medium portion is 6%-12%.

[0075] The above description is merely a preferred embodiment of the present application and is not intended to limit the scope of protection of the present application.

Claims

1. An aerosol generating system comprising: An aerosol generating device, the aerosol generating device comprising a housing, a heating element contained in the housing, a containing tube and a power supply device, the containing tube being provided with a containing space, the heating element being at least partially disposed in the containing space; The power supply device is connected to the heating element to provide electrical energy to the heating element; The aerosol generating substrate is inserted in the containing space, the heating element is at least partially inserted in the aerosol generating substrate, and a radial gap exists between at least a portion of the heating element in the aerosol generating substrate and the aerosol generating substrate.

2. An aerosol generating system according to claim 1, wherein: The aerosol generating substrate is at least partially hollow inside to form a heating cavity, and the heating element is at least partially disposed in the heating cavity and spaced apart from an inner wall of the heating cavity.

3. An aerosol generating system according to claim 2, wherein: The heating element is coaxially arranged with the heating chamber.

4. An aerosol generating system according to claim 2, wherein: The aerosol generating substrate comprises a mouthpiece portion, a cooling portion and a medium portion which are connected in sequence, and the heating chamber is arranged in the medium portion along the length direction of the aerosol generating substrate.

5. An aerosol generating system according to claim 4, wherein: The mouthpiece is located downstream of the aerosol generating substrate, the medium is located upstream of the aerosol generating substrate, the cooling unit is located between the mouthpiece and the medium, and the cooling unit is configured to cool the aerosol generated by heating the medium.

6. An aerosol generating system according to claim 5, wherein: The aerosol generating substrate further includes a supporting portion, which is disposed between the cooling portion and the medium portion and supports the medium portion.

7. An aerosol generating system according to claim 4, wherein: The medium part is configured as an integral sheet rolled into a cylindrical structure, a dense powder structure or a particle pressed cylindrical structure.

8. An aerosol generating system according to claim 2, wherein: The distance between the inner wall of the heating chamber and the surface of the heating element is 0.1 mm to 1.5 mm; and / or, The radial dimension of the heating chamber is greater than the radial dimension of the heating element.

9. An aerosol generating system according to claim 2, wherein: The aerosol generating matrix has a suction resistance of 0.1 kPa to 0.3 kPa.

10. An aerosol generating system according to claim 2, wherein: The heating element is an infrared heating element with a sheet-like, needle-like, column-like or cylindrical structure.

11. An aerosol generating system according to claim 2, wherein: The heating chamber is a columnar chamber or an annular chamber.

12. An aerosol generating system according to claim 4, wherein: When the medium portion is configured as a whole sheet curled into a cylindrical structure, the density of the medium portion is greater than or equal to 200 mg / cm 3 And less than or equal to 500mg / cm 3 ; or, When the medium part is configured as a compacted powder or granular pressed cylindrical structure, the density of the medium part is less than or equal to 1500 mg / cm 3 .

13. An aerosol generating system according to claim 4, wherein: The length of the medium portion is greater than or equal to 1 cm and less than or equal to 5 cm; And / or, the outer diameter of the medium portion is greater than or equal to 0.5 cm and less than or equal to 1 cm.

14. An aerosol generating system according to claim 4, wherein: When the medium part is configured as a compacted powder or granular pressed cylindrical structure, the density of the medium part is greater than or equal to 1000 mg / cm 3 And less than or equal to 1500mg / cm 3 .

15. An aerosol generating system according to claim 4, wherein: The atomizer content in the medium portion is 9%-11.5%; And / or, the moisture content in the medium portion is 6%-12%.

16. An aerosol generating substrate, comprising a mouthpiece portion, a cooling portion and a medium portion connected in sequence, wherein the interior of the medium portion is hollow to form a heating cavity, the heating cavity is configured to allow a heating element to pass through, and a surface of the heating element is spaced apart from an inner wall of the heating cavity.

17. An aerosol-generating substrate according to claim 16, wherein The medium part is configured as a whole sheet curled into a cylindrical structure, a dense powder structure or a particle pressed cylindrical structure; When the medium portion is configured as a whole sheet curled into a cylindrical structure, the density of the medium portion is greater than or equal to 200 mg / cm 3 And less than or equal to 500mg / cm 3 ; or, When the medium part is configured as a compacted powder or granular pressed cylindrical structure, the density of the medium part is less than or equal to 1500 mg / cm 3 .

18. An aerosol-generating substrate according to claim 16, wherein When the medium part is configured as a compacted powder or granular pressed cylindrical structure, the density of the medium part is greater than or equal to 1000 mg / cm 3 And less than or equal to 1500mg / cm 3 .

19. An aerosol-generating substrate according to claim 16, wherein The suction resistance of the medium portion is 0.1 kPa-0.3 kPa; And / or, the length of the medium portion is greater than or equal to 1 cm and less than or equal to 5 cm; and / or, the outer diameter of the medium portion is greater than or equal to 0.5 cm and less than or equal to 1 cm; and / or, the content of the atomizer in the medium portion is 9%-11.5%; And / or, the moisture content in the medium portion is 6%-12%.

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