Heating body and aerosol-generating device

Abstract

The utility model relates to the technical field of aerosol generation. The utility model provides a heating body and an aerosol generating device.The heating body is internally provided with a containing cavity used for containing an aerosol substrate, one end of the containing cavity is provided with an opening, the opening is used for allowing the aerosol substrate to be inserted into and withdrawn from the containing cavity, and the heating body is provided with a side wall enclosed along the periphery of the opening and a bottom wall arranged opposite to the opening; a containing cavity is defined by the bottom wall and the side wall, and the side wall is sequentially provided with a first contact area and a second contact area in the insertion direction of the aerosol matrix; wherein the first contact area or the second contact area and the side surface of the aerosol substrate are arranged at intervals in a non-contact manner; alternatively, the contact areas of the first contact area and the second contact area with the side surface of the aerosol substrate are different. According to the heating body and the aerosol generating device, the contact area between the heating body and the outer side face of the aerosol substrate can be reduced, and therefore the situation that a user sucks miscellaneous gas can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of aerosol generation, and in particular to a heating body and an aerosol generating device. Background Art

[0002] When using the aerosol generating device, the user inserts the aerosol matrix into the interior of the aerosol generating device, and the aerosol matrix is heated by the heating body in the aerosol generating device, so that the aerosol matrix generates aerosol for the user to inhale.

[0003] In some related technologies, the heating body can be heated by contact heat transfer and hot air flow. In some hot air flow heating schemes, the airflow will first pass through the outer side of the aerosol matrix, and then enter the interior of the aerosol matrix from the bottom surface of the aerosol matrix. When the airflow passes through the area where the heating circuit is arranged on the heating body, it will be heated into a hot air flow, so that the hot air flow entering the interior of the aerosol matrix can heat the aerosol matrix. A portion of the side wall of the heating body will contact the outer side of the aerosol matrix. The outer side of the aerosol matrix is usually a wrapping material that wraps the grass leaf matrix, such as paper. If the heating body contacts the paper and heats it too much, it can easily burn the paper, causing the user to easily inhale stray air. Utility Model Content

[0004] The heating element and aerosol generating device of the present application can solve the problem that users are prone to inhaling stray gases.

[0005] To solve the above technical problems, the present application provides a heating body, wherein a chamber for accommodating an aerosol matrix is provided within the heating body, and an opening is provided at one end of the chamber for allowing the aerosol matrix to be inserted into and removed from the chamber. When the aerosol matrix is inserted into the chamber, external air flows into the heating body through the gap between the aerosol matrix and the chamber wall. The heating body is used to heat the inflowing airflow into a hot airflow.

[0006] The heating body has a side wall surrounding the opening and a bottom wall arranged opposite the opening, the bottom wall and the side wall forming a receiving cavity, and the side wall is provided with a first contact area and a second contact area in sequence in the insertion direction of the aerosol substrate;

[0007] The first contact region or the second contact region is arranged at a non-contact interval with the side surface of the aerosol matrix; or the first contact region and the second contact region have different contact areas with the side surface of the aerosol matrix.

[0008] In one embodiment, the first contact region has an annular first avoidance position, the first avoidance position being configured to allow the first contact region to be spaced apart from the side surface of the aerosol substrate in a non-contact manner; the minimum inner diameter of the first contact region is greater than the minimum inner diameter of the second contact region;

[0009] Or the second contact area has a second annular avoidance position, which is used to ensure that the second contact area is spaced apart from the side surface of the aerosol matrix in a non-contact manner; the minimum inner diameter of the second contact area is greater than the minimum inner diameter of the first contact area.

[0010] In one embodiment, the first contact area is provided with a first contact portion, which is a plurality of first protrusions provided on the inner wall of the first contact area, and the plurality of first protrusions are arranged at intervals along the circumference of the accommodating cavity; the first protrusions are used to contact the side surface of the aerosol matrix.

[0011] In one embodiment, the first protrusion is an elongated structure, and the elongated structure extends from a side close to the opening to a side away from the opening.

[0012] In one embodiment, the second contact area is provided with a second contact portion, which is a plurality of second protrusions provided on the inner wall of the second contact area, and the plurality of second protrusions are arranged at intervals along the circumference of the accommodating cavity; the second protrusions are used to contact the side surface of the aerosol matrix.

[0013] In one embodiment, the first contact region is provided with a first contact portion, which is a plurality of first protrusions provided on the inner wall of the first contact region, and the plurality of first protrusions are arranged at intervals along the circumference of the accommodating cavity; the first protrusions are configured to contact the side surface of the aerosol matrix;

[0014] The contact area between the first contact region and the side surface of the aerosol matrix is greater than the contact area between the second contact region and the side surface of the aerosol matrix, the contact area between each second protrusion and the aerosol matrix is smaller than the contact area between each first protrusion and the aerosol matrix, or the total contact area between all second protrusions and the aerosol matrix is smaller than the total contact area between all first protrusions and the aerosol matrix;

[0015] Alternatively, the contact area between the first contact region and the side surface of the aerosol matrix is smaller than the contact area between the second contact region and the side surface of the aerosol matrix, the contact area between each second protrusion and the aerosol matrix is greater than the contact area between each first protrusion and the aerosol matrix, or the total contact area between all second protrusions and the aerosol matrix is greater than the total contact area between all first protrusions and the aerosol matrix.

[0016] In one embodiment, the bottom wall and / or the second contact area has a supporting portion, which is used to contact the bottom surface of the aerosol matrix; when the aerosol matrix is inserted into the accommodating cavity and abuts against the supporting portion, a first channel exists between the bottom wall and the aerosol matrix, and the outside air can flow into the aerosol matrix through the first channel after entering the heating body.

[0017] In one embodiment, the heating body includes a base and a heating element, the base includes a bottom wall and side walls, and the heating element is arranged on the bottom wall of the base to heat the airflow in the first channel.

[0018] In order to solve the above technical problems, the present application provides an aerosol generating device, comprising a heating body involved in any of the above items.

[0019] In one embodiment, the aerosol generating device also includes a bracket assembly, the heating body is installed in the bracket assembly, the bracket assembly includes an upper bracket and a lower bracket, a receiving cavity is provided in the lower bracket, a supporting portion is provided on the cavity wall of the receiving cavity, a flange is provided at the end of the heating body close to the opening, and the supporting portion supports the flange to suspend the heating body in the receiving cavity; the upper bracket is pressed on the flange so that the flange is clamped between the upper bracket and the supporting portion.

[0020] The present application provides a heating body, which is provided with a receiving cavity for accommodating an aerosol matrix, and an opening is provided at one end of the receiving cavity, which is used for the aerosol matrix to be inserted into and exited from the receiving cavity. When the aerosol matrix is inserted into the receiving cavity, external air can flow into the heating body from the gap between the aerosol matrix and the cavity wall of the receiving cavity, and the heating body is used to heat the inflowing airflow into a hot airflow; the heating body has side walls surrounding the opening and a bottom wall arranged opposite to the opening, the bottom wall and the side wall enclose a receiving cavity, and the side wall is sequentially provided with a first contact area and a second contact area in the insertion direction of the aerosol matrix; wherein the first contact area or the second contact area is arranged at a non-contact interval with the side surface of the aerosol matrix; or, the first contact area and the second contact area have different contact areas with the side surface of the aerosol matrix. In the heating body of the present application, the first contact area or the second contact area of the side wall of the heating body is arranged at a non-contact interval with the side surface of the aerosol matrix, or the contact area of the second contact area with the aerosol matrix is reduced relative to the first contact area, or the contact area of the first contact area with the aerosol matrix is reduced relative to the second contact area, so that the contact area of the heating body with the outer side surface of the aerosol matrix is reduced as much as possible, thereby reducing the situation where the user inhales stray gases. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of an aerosol generating device provided in one embodiment of the present application;

[0022] Figure 2 for Figure 1 sectional view of

[0023] Figure 3 A schematic structural diagram of an aerosol generating device provided in another embodiment of the present application;

[0024] Figure 4 for Figure 3 sectional view of

[0025] Figure 5A schematic structural diagram of an aerosol generating device provided in yet another embodiment of the present application;

[0026] Figure 6 for Figure 5 sectional view of

[0027] Figure 7 A schematic structural diagram of a heating element provided in one embodiment of the present application;

[0028] Figure 8 A schematic structural diagram of a heating body provided in another embodiment of the present application;

[0029] Figure 9 for Figure 3 Schematic diagram of air flow direction;

[0030] Figure 10 for Figure 7 A structural diagram from another perspective;

[0031] Figure 11 for Figure 3 Exploded diagram.

[0032] Description of the drawings: aerosol matrix 10, bracket assembly 21, first air inlet channel 211, upper bracket 212, lower bracket 213, accommodating chamber 2131, supporting portion 2132, heating body 22, accommodating chamber 221, opening 2211, second air inlet channel 2212, second channel 2212a, third channel 2212b, first channel 2212c, side wall 222, first contact area 2221, first avoidance position 2221a, first contact portion 2221b, first protrusion 2221c, second contact area 2222, second avoidance position 2222a, second contact portion 2222b, second protrusion 2222c, bottom wall 223, supporting portion 224, base 225, heating element 226, flange 227, clamping member 23, housing 30, power supply assembly 40. DETAILED DESCRIPTION

[0033] The present application is further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted in different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail. They can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0034] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various implementations, and the operational steps involved in each embodiment may be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing a particular embodiment and do not imply a required composition and / or sequence.

[0035] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings).

[0036] The terms "parallel" and "perpendicular" are defined in terms of the current state of the art, rather than being absolutely strict definitions in a mathematical sense. A small amount of deviation is allowed, and being approximately parallel or approximately perpendicular is acceptable. For example, A and B are parallel, which means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0° and 10°. For example, A and B are perpendicular, which means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80° and 100°. The directional terms mentioned in the embodiments of the present application, such as "upper", "inner", "outer", "side", etc., are only directions with reference to the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present application.

[0037] Please refer to Figure 1-6 The present application provides an aerosol generating device, which is used to heat an aerosol matrix 10 so that the aerosol matrix 10 generates an aerosol. The aerosol matrix 10 can be used as a consumable material of the aerosol generating device. Generally, the aerosol matrix 10 may include a matrix segment, a cooling segment and a filter segment. The matrix segment is used to accommodate the grass leaf matrix, the cooling segment is used to cool the aerosol generated by the matrix segment, and the filter segment can filter the aerosol. The user can inhale the aerosol generated by the matrix segment by inhaling the filter segment. In the present application, the aerosol generating device may include the aerosol matrix 10, or may not include the aerosol matrix 10.

[0038] The aerosol generating device includes a heater 22 as described in any of the following embodiments. The heater 22 can heat the aerosol substrate 10, thereby generating an aerosol from the aerosol substrate 10. Furthermore, in one embodiment, the aerosol generating device can further include a support assembly 21, a housing 30, and a power supply assembly 40. The support assembly 21 is mounted within the housing 30, and the heater 22 can be mounted within the support assembly 21. The power supply assembly 40 is used to supply power to the heater 22.

[0039] like Figure 7-8 The present application provides a heating body 22, which is used to heat the aerosol matrix 10 so that the aerosol matrix 10 generates an aerosol, for example Figure 3 and Figure 4 Schematic diagram of the aerosol matrix 10 inserted into the heating body 22, Figure 5 and Figure 6 FIG. 2 is a structural diagram of the heating body 22 without the aerosol matrix 10 inserted.

[0040] like Figure 6-9 As shown, the aerosol generating device includes a support assembly 21 and a heater 22. When the aerosol substrate 10 is inserted into the support assembly 21 and the heater 22, the gap between the support assembly 21 and the aerosol substrate 10 forms a first air inlet channel 211. The heater 22 is mounted on the support assembly 21. A receiving cavity 221 is defined within the heater 22 for accommodating the aerosol substrate 10. An opening 2211 is defined at one end of the cavity 221 for allowing the aerosol substrate 10 to be inserted into and removed from the cavity 221. When the aerosol substrate 10 is inserted into the accommodating cavity 221, the gap between the cavity wall of the accommodating cavity 221 and the aerosol substrate 10 forms a second air inlet channel 2212. Thus, when the aerosol substrate 10 is inserted into the accommodating cavity 221, the outside air can flow into the heating body 22 from the gap between the aerosol substrate 10 and the cavity wall of the accommodating cavity 221. The second air inlet channel 2212 is connected to the first air inlet channel 211 and the accommodating cavity 221. Figure 8 As shown, when a user inhales the aerosol matrix 10 , external airflow can enter the interior of the aerosol matrix 10 disposed in the accommodating cavity 221 through the first air inlet channel 211 and the second air inlet channel 2212 .

[0041] like Figure 6-8 As shown, the heating body 22 generates heat to heat the airflow flowing into the heating body 22 into a hot airflow, that is, to heat the airflow in the second air inlet channel 2212 into a hot airflow, so that the hot airflow heats the aerosol substrate 10. The heating body 22 has a side wall 222 surrounding the opening 2211 and a bottom wall 223 disposed opposite the opening 2211. The side wall 222 may be annular, and the bottom wall 223 may enclose the side wall 222 to form a receiving cavity 221.

[0042] The side wall 222 includes a first contact area 2221 close to the opening 2211 and a second contact area 2222 away from the opening 2211 , that is, the side wall 222 is sequentially provided with the first contact area 2221 and the second contact area 2222 in the insertion direction of the aerosol substrate 10 .

[0043] When the aerosol substrate 10 is installed in the heating body 22, the first contact region 2221 or the second contact region 2222 is spaced apart from and in non-contact with the side surface of the aerosol substrate 10, i.e., the first contact region 2221 or the second contact region 2222 is completely non-contacting with the aerosol substrate 10. When the first contact region 2221 is spaced apart from and in non-contact with the aerosol substrate 10, the second contact region 2222 is in contact with the aerosol substrate 10; when the second contact region 2222 is spaced apart from and in non-contact with the aerosol substrate 10, the first contact region 2221 is in contact with the aerosol substrate 10. The portion of the sidewall 222 of the heating body 22 in contact with the aerosol substrate 10 can limit the aerosol substrate 10 and provide contact heat transfer to the aerosol substrate 10.

[0044] Alternatively, when the aerosol substrate 10 is installed in the heating body 22, the first contact area 2221 and the second contact area 2222 are in contact with the side surface of the aerosol substrate 10, and the contact area between the first contact area 2221 and the side surface of the aerosol substrate 10 is different from the contact area between the second contact area 2222 and the side surface of the aerosol substrate 10.

[0045] In the heating body 22 of the present application, the first contact area 2221 or the second contact area 2222 of the side wall 222 of the heating body 22 is completely separated from the aerosol matrix 10, or the contact areas of the first contact area 2221 and the second contact area 2222 with the side surface of the aerosol matrix 10 are different, so that the contact area of the heating body 22 with the outer side surface of the aerosol matrix 10 is reduced as much as possible, thereby reducing the possibility of the user inhaling stray air.

[0046] When the first contact area 2221 is arranged in a non-contact interval with the side surface of the aerosol matrix 10, or the contact area of the first contact area 2221 is smaller than the contact area of the second contact area 2222, a small amount of stray gas will be generated on the bottom side of the aerosol matrix 10 due to the contact between the second contact area 2222 of the side wall 222 and the aerosol matrix 10. The position where the stray gas is generated is at a long distance from the suction position on the top side of the aerosol matrix 10, and the stray gas is more easily filtered by the grass leaf matrix in the aerosol matrix 10, thereby reducing the situation where the user inhales stray gas.

[0047] like Figure 7As shown, in one embodiment, the first contact region 2221 has an annular first clearance position 2221a. The first clearance position 2221a is used to ensure that the first contact region 2221 is spaced apart from the side surface of the aerosol substrate 10 in a non-contact manner. The overall structure of the first contact region 2221 may be radially farther from the central axis of the heating body 22 than the second contact region 2222. Therefore, the annular first clearance position 2221a may be formed on the side of the first contact region 2221 facing the central axis of the heating body 22. As a result, the minimum inner diameter of the first contact region 2221 is larger than the minimum inner diameter of the second contact region 2222.

[0048] Or, as Figure 8 As shown, in one embodiment, the second contact region 2222 has an annular second clearance position 2222a. The second clearance position 2222a is used to ensure that the second contact region 2222 is spaced apart from the side surface of the aerosol substrate 10 in a non-contact manner. The overall structure of the second contact region 2222 may be radially further away from the central axis of the heating body 22 than the first contact region 2221. Therefore, the annular second clearance position 2222a may be formed on the side of the second contact region 2222 facing the central axis of the heating body 22. As a result, the minimum inner diameter of the first contact region 2221 is smaller than the minimum inner diameter of the second contact region 2222.

[0049] By setting the first contact area 2221 as an annular first avoidance position 2221a or setting the second contact area 2222 as an annular second avoidance position 2222a, the aerosol matrix 10 has a cylindrical structure, and the annular first avoidance position 2221a or the second avoidance position 2222a can be spaced around the outer periphery of the aerosol matrix 10, so that a gap can be formed between the first contact area 2221 or the second contact area 2222 and the aerosol matrix 10, so that the first contact area 2221 or the second contact area 2222 is completely out of contact with the aerosol matrix 10, avoiding the situation where the first contact area 2221 or the second contact area 2222 contacts the aerosol matrix 10 to generate stray gas, and overall reducing the possibility of the heating body 22 generating stray gas.

[0050] In one embodiment, if Figure 8 As shown, the first contact region 2221 has a first contact portion 2221b, which is used to contact the side surface of the aerosol substrate 10. The first contact portion 2221b can be used to limit the aerosol substrate 10 and to conduct contact heat transfer to the aerosol substrate 10. To improve heat transfer efficiency, the heating body 22 can be made of a highly thermally conductive material, such as aluminum alloy, copper, silicon carbide, or the like.

[0051] like Figure 8 As shown, in one embodiment, the first contact portion 2221b is a plurality of first protrusions 2221c provided in the first contact region 2221 of the sidewall 222. The plurality of first protrusions 2221c are arranged at intervals along the circumference of the accommodating chamber 221. Preferably, the plurality of first protrusions 2221c are evenly arranged along the circumference. The end of the first protrusion 2221c, which is close to the central axis of the heating body 22, is used to contact the side surface of the aerosol substrate 10. Preferably, the contact surface between the first protrusion 2221c and the side surface of the aerosol substrate 10 is an arcuate surface. The arcuate surface can better fit the outer side surface of the cylindrical aerosol substrate 10, so that the first protrusion 2221c and the aerosol substrate 10 are in surface contact. Compared with point contact, surface contact can prevent excessive heat from being generated locally on the outer side surface of the aerosol substrate 10.

[0052] In one embodiment, if Figure 7 As shown, the second contact region 2222 has a second contact portion 2222b, which is used to contact the side surface of the aerosol substrate 10. The second contact portion 2222b can be used to limit the aerosol substrate 10 and to perform contact heat transfer to the aerosol substrate 10. In one embodiment, the second contact portion 2222b is a plurality of second protrusions 2222c provided in the second contact region 2222 of the sidewall 222. The plurality of second protrusions 2222c are arranged at intervals along the circumference of the accommodating cavity 221. Preferably, the plurality of second protrusions 2222c are evenly arranged along the circumference. One end of the second protrusion 2222c close to the central axis of the heating body 22 is used to contact the side surface of the aerosol matrix 10. Preferably, the contact surface between the second protrusion 2222c and the side surface of the aerosol matrix 10 is an arc-shaped surface, which can better fit the outer side surface of the cylindrical aerosol matrix 10, so that the second protrusion 2222c and the aerosol matrix 10 are in surface contact. Compared with point contact, surface contact can prevent excessive heat from being generated locally on the outer side surface of the aerosol matrix 10.

[0053] Among them, the first protrusion 2221c and / or the second protrusion 2222c can be a long strip structure, and the long strip structure refers to a structure whose length extension dimension is much larger than the width dimension and the height dimension, and the long strip structure extends from the side close to the opening 2211 to the side away from the opening 2211.

[0054] In one embodiment, when both the first contact region 2221 and the second contact region 2222 are in contact with the side surface of the aerosol substrate 10, the contact area between the first contact region 2221 and the side surface of the aerosol substrate 10 may be greater than the contact area between the second contact region 2222 and the side surface of the aerosol substrate 10, the contact area between each second protrusion 2222c and the aerosol substrate 10 may be smaller than the contact area between each first protrusion 2221c and the aerosol substrate 10, or the total contact area between all the second protrusions 2222c and the aerosol substrate 10 may be smaller than the total contact area between all the first protrusions 2221c and the aerosol substrate 10.

[0055] Alternatively, when the first contact area 2221 and the second contact area 2222 are both in contact with the side surface of the aerosol matrix 10, the contact area between the first contact area 2221 and the side surface of the aerosol matrix 10 may be smaller than the contact area between the second contact area 2222 and the side surface of the aerosol matrix 10, the contact area between each second protrusion 2222c and the aerosol matrix 10 may be greater than the contact area between each first protrusion 2221c and the aerosol matrix 10, or the total contact area between all second protrusions 2222c and the aerosol matrix 10 may be greater than the total contact area between all first protrusions 2221c and the aerosol matrix 10.

[0056] Among them, such as Figure 7-9 As shown, the second air inlet channel 2212 includes a second channel 2212a and a third channel 2212b. The second channel 2212a is formed by the cooperation between the first contact area 2221 and the aerosol matrix 10. The third channel 2212b is formed by the cooperation between the second contact area 2222 and the aerosol matrix 10. When a first avoidance position 2221a is provided in the first contact area 2221, the second channel 2212a is formed by the cooperation between the first avoidance position 2221a and the aerosol matrix 10. When a first contact portion 2221b is provided in the first contact area 2221, the second channel 2212a is formed by the cooperation between the first contact portion 2221b and the aerosol matrix 10. For example, the second channel 2212a can be formed by the space between adjacent first protrusions 2221c and the aerosol matrix 10. When a second avoidance position 2222a is provided in the second contact area 2222, the third channel 2212b is formed by the second avoidance position 2222a and the aerosol matrix 10. When a second contact portion 2222b is provided in the second contact area 2222, the third channel 2212b is formed by the second contact portion 2222b and the aerosol matrix 10. For example, the space between adjacent second protrusions 2222c cooperates with the aerosol matrix 10 to form the third channel 2212b.

[0057] The airflow may flow downward through the first air inlet channel 211 and the second channel 2212a into the third channel 2212b. The airflow is preheated into hot airflow in the second channel 2212a, and the hot airflow may be further heated when entering the third channel 2212b.

[0058] In one embodiment, if Figure 7-10 As shown, the second contact area 2222 of the bottom wall 223 and / or the side wall 222 has a supporting portion 224, and the supporting portion 224 is used to contact the bottom surface of the aerosol matrix 10 to support the bottom surface of the aerosol matrix 10. Figure 7-9 As shown, the second air inlet channel 2212 also includes a first channel 2212c. When the aerosol substrate 10 is inserted into the accommodating cavity 221 and abuts the supporting portion 224, the first channel 2212c exists between the bottom wall 223 and the aerosol substrate 10. After entering the heating body 22, external air can flow into the aerosol substrate 10 through the second channel 2212a, the third channel 2212b, and the first channel 2212c. This arrangement of the air inlet channels allows the second air inlet channel 2212 to not only heat the hot air flow, but also preheat the aerosol substrate 10, thereby improving energy utilization.

[0059] In one embodiment, if Figure 10 As shown, the heating body 22 includes a base 225 and a heating element 226, and the base 225 includes a bottom wall 223 and a side wall 222. The heating element 226 is arranged on the bottom wall 223 of the base 225 to heat the airflow in the first channel 2212c. By arranging the heating element on the bottom wall 223 of the base 225, it can be ensured that the heating temperature of the hot air flow before entering the aerosol matrix 10 meets the requirements, so that the hot air flow can fully heat the aerosol matrix 10. The heating element 226 can be, for example, in the form of a heating film, a heating net, a heating sheet, a heating circuit, a heating wire, etc., and this application does not limit the form of the heating element 226.

[0060] In one embodiment, if Figure 6 and Figure 11As shown, the bracket assembly 21 includes an upper bracket 212 and a lower bracket 213. A receiving cavity 2131 is provided in the lower bracket 213. A support portion 2132 is protruded on the side of the cavity wall of the receiving cavity 2131 near the opening 2211. A flange 227 is provided on the end of the heating body 22 near the opening 2211. The support portion 2132 supports the flange 227 to suspend the heating body 22 in the receiving cavity 2131. By suspending the heating body 22 on the side of the lower bracket 213 near the opening 2211, the contact point between the lower bracket 213 and the heating body 22 can be made further away from the heating element 226 on the bottom wall 223 of the heating body 22, thereby reducing the transfer of heat from the heating element 226 to the lower bracket 213. A heat insulating layer can be provided on the cavity wall of the receiving cavity 2131 to reduce the transfer of heat from the receiving cavity 2131 to the outside. The upper bracket 212 is pressed against the flange 227, so that the flange 227 is sandwiched between the upper bracket 212 and the support portion 2132, thereby securing the heater 22. At least a portion of the first air inlet channel 211 is disposed within the upper bracket 212. The aerosol generating device may further include a clamping member 23 mounted on the bracket assembly 21. Preferably, the clamping member 23 is mounted on the upper bracket 212. The clamping member 23 is used to clamp the aerosol substrate 10 to prevent movement during use.

[0061] The above examples are used to illustrate the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, modifications or substitutions can be made based on the ideas of the present invention.

Claims

1. A heating element, characterized in that: The heating body is provided with a receiving cavity for accommodating an aerosol matrix, and one end of the receiving cavity is provided with an opening, the opening being used for allowing the aerosol matrix to be inserted into and exited from the receiving cavity. When the aerosol matrix is inserted into the receiving cavity, external air flows into the heating body from a gap between the aerosol matrix and the cavity wall of the receiving cavity, and the heating body is used to heat the inflowing airflow into a hot airflow. The heating body has a side wall surrounding the opening and a bottom wall opposite to the opening, the bottom wall and the side wall forming the accommodating cavity, and the side wall is provided with a first contact area and a second contact area in sequence in the insertion direction of the aerosol substrate; The first contact area or the second contact area is arranged at a non-contact interval with the side surface of the aerosol matrix; or the first contact area and the second contact area have different contact areas with the side surface of the aerosol matrix.

2. The heating element according to claim 1, characterized in that The first contact area has a first annular avoidance position, and the first avoidance position is used to ensure that the first contact area is spaced apart from the side surface of the aerosol substrate in a non-contact manner; the minimum inner diameter of the first contact area is greater than the minimum inner diameter of the second contact area; Or the second contact area has a second annular avoidance position, which is used to ensure that the second contact area is spaced apart from the side surface of the aerosol matrix in a non-contact manner; the minimum inner diameter of the second contact area is greater than the minimum inner diameter of the first contact area.

3. The heating element according to claim 1, characterized in that The first contact area is provided with a first contact portion, which is a plurality of first protrusions provided on the inner wall of the first contact area. The plurality of first protrusions are arranged at intervals along the circumference of the accommodating cavity; the first protrusions are used to contact the side surface of the aerosol matrix.

4. The heating element according to claim 3, characterized in that The first protrusion is a long strip-shaped structure, and the long strip-shaped structure extends from a side close to the opening to a side away from the opening.

5. The heating element according to claim 1 or 2, characterized in that The second contact area is provided with a second contact portion, which is a plurality of second protrusions provided on the inner wall of the second contact area. The plurality of second protrusions are arranged at intervals along the circumference of the accommodating cavity; the second protrusions are used to contact the side surface of the aerosol matrix.

6. The heating element according to claim 5, characterized in that The first contact region is provided with a first contact portion, which is a plurality of first protrusions provided on the inner wall of the first contact region, and the plurality of first protrusions are arranged at intervals along the circumference of the accommodating cavity; the first protrusions are used to contact the side surface of the aerosol matrix; The contact area between the first contact region and the side surface of the aerosol substrate is larger than the contact area between the second contact region and the side surface of the aerosol substrate, the contact area between each of the second protrusions and the aerosol substrate is smaller than the contact area between each of the first protrusions and the aerosol substrate, or the total contact area between all of the second protrusions and the aerosol substrate is smaller than the total contact area between all of the first protrusions and the aerosol substrate; Alternatively, the contact area between the first contact area and the side surface of the aerosol matrix is smaller than the contact area between the second contact area and the side surface of the aerosol matrix, the contact area between each second protrusion and the aerosol matrix is greater than the contact area between each first protrusion and the aerosol matrix, or the total contact area between all the second protrusions and the aerosol matrix is greater than the total contact area between all the first protrusions and the aerosol matrix.

7. The heating element according to any one of claims 1 to 4, characterized in that: The bottom wall and / or the second contact area have a supporting portion, which is used to contact the bottom surface of the aerosol matrix; when the aerosol matrix is inserted into the accommodating cavity and abuts against the supporting portion, a first channel exists between the bottom wall and the aerosol matrix, and the outside air can flow into the aerosol matrix through the first channel after entering the heating body.

8. The heating element according to claim 7, characterized in that The heating body includes a base and a heating element. The base includes the bottom wall and the side walls. The heating element is arranged on the bottom wall of the base to heat the airflow in the first channel.

9. An aerosol generating device, characterized in that: The heating device comprises the heating body according to any one of claims 1 to 8.

10. The aerosol generating device according to claim 9, characterized in that It also includes a bracket assembly, the heating body is installed in the bracket assembly, the bracket assembly includes an upper bracket and a lower bracket, a receiving cavity is provided in the lower bracket, a support portion is provided on the cavity wall of the receiving cavity, a flange is provided at the end of the heating body close to the opening, the support portion supports the flange to suspend the heating body in the receiving cavity; the upper bracket is pressed on the flange so that the flange is clamped between the upper bracket and the support portion.

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