Heating piece and atomization device

Abstract

The present application provides a heating piece and an atomization device. The heating piece comprises a heating part and an electrode part, the heating part being rolled into a cylindrical structure; the heating part is provided with a plurality of recess parts and / or a plurality of protrusion parts, the recess parts being bent inwards in the radial direction of the cylindrical structure, and the protrusion parts being bent outwards in the radial direction of the cylindrical structure; the electrode part is connected to the heating part.

Description

Heating element and atomization device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese utility model patent application filed on December 14, 2023, with application number 2023234171690 and entitled "Heating element and atomizing device," the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of electronic atomization devices, and in particular to a heating element and an atomization device. Background Art

[0004] In electronic atomizer devices, heaters are typically used to heat the aerosol-generating substrate, enabling it to generate aerosol for the user. Surface-heating heaters have a larger overall heating area, but without increasing heating power, atomization power is poor, making it difficult to achieve high levels of nicotine and total particulate matter (TPM) in electronic atomizer smoke and high vapor volume. Summary of the Invention

[0005] The present application provides a heating element and an atomizing device, which have a large atomizing explosive force.

[0006] To solve the above technical problems, the present application provides a heating element, comprising a heating portion and an electrode portion. The heating portion is wound and enclosed to form a cylindrical structure, and is provided with a plurality of recessed portions and / or a plurality of raised portions. The recessed portions are bent inwardly along the radial direction of the cylindrical structure, and the raised portions are bent outwardly along the radial direction of the cylindrical structure. The electrode portion is connected to the heating portion.

[0007] In one embodiment, the plurality of recessed portions or the plurality of raised portions are arranged at intervals; or, among the plurality of recessed portions and the plurality of raised portions, the recessed portions and the raised portions are arranged alternately.

[0008] In one embodiment, the plurality of recessed portions or the plurality of raised portions are arranged at intervals; or, among the plurality of recessed portions and the plurality of raised portions, the recessed portions and the raised portions are arranged alternately.

[0009] In one embodiment, the heating portion further includes a main body portion, the main body portion is connected to the recessed portion and / or the raised portion, and the main body portion is parallel to the axial direction of the cylindrical structure.

[0010] In one embodiment, the heating portion is a mesh structure; the heating portion includes a plurality of heating units, each of which is provided with hollow holes, and the plurality of heating units are arranged in an array and interconnected to form a mesh structure.

[0011] In one embodiment, the heating unit is a diamond-shaped structure, and each adjacent diamond-shaped structure is connected by an endpoint; the diamond structure includes an upper endpoint, a lower endpoint, a left endpoint, and a right endpoint, and the recessed portion or the raised portion includes a first wall surface and a second wall surface, the first wall surface and the second wall surface are connected and arranged opposite to each other, and the upper endpoint and the lower endpoint or the left endpoint or the right endpoint of the diamond structure are located at the connection between the first wall surface and the second wall surface.

[0012] In one embodiment, the recessed portion or the raised portion is a curved surface structure, or the recessed portion or the raised portion includes a first wall surface and a second wall surface, and the first wall surface and the second wall surface are connected and arranged opposite to each other.

[0013] In one embodiment, the recessed portion or the raised portion includes a first wall surface and a second wall surface, and the first wall surface and the second wall surface form an angle of 10°-130°.

[0014] In one embodiment, the heating element includes multiple rows of heating unit groups along the axial direction of the heating element, and each row of heating unit groups includes multiple heating units connected in sequence along the circumferential direction of the heating element.

[0015] In one embodiment, the heating part includes a main heating part and a wiring part, the main heating part is provided with multiple recessed parts and / or raised parts, the electrode part is connected to the wiring part, and a heat-resistant stress hole is provided at the connection between the main heating part and the wiring part.

[0016] In one embodiment, the heating part includes a main heating part and a plurality of heat-conducting parts, the main heating part is provided with a plurality of recessed parts and / or raised parts, and along the axial direction of the heating element, the main heating part has a first end and a second end relative to each other, the heat-conducting part is connected to the first end and / or the second end of the main heating part, and the heat-conducting part extends along the axial direction of the heating element.

[0017] In order to solve the above technical problems, the present application also provides an atomization device, including the heating element involved in any of the above embodiments.

[0018] In one embodiment, the atomizing device further includes a liquid storage member, a sleeve, and a liquid guiding member, and the liquid storage member, the sleeve, the heating member, and the liquid guiding member are nested in sequence from the outside to the inside; a liquid inlet hole is provided on the sleeve, and the two sides of the liquid inlet hole are respectively connected to the heating member and the liquid storage member, and the heating part of the heating member is provided with a plurality of recessed portions, and at least part of the recessed portion is inserted into the liquid guiding member.

[0019] In one embodiment, the aerosol generating matrix is ​​atomized into an aerosol in the sleeve, one end of the sleeve is the aerosol outlet of the sleeve, the other end of the sleeve has an air inlet, and a plurality of liquid inlet holes are provided on one side of the sleeve close to the air inlet, and the heating element is provided at the end of the sleeve where the liquid inlet hole is provided.

[0020] In some embodiments, the liquid-conducting member is a porous structure capable of absorbing tobacco oil.

[0021] In the heating element and atomizing device of the present application, the heating element includes a heating portion and an electrode portion. The heating portion is wound and enclosed to form a cylindrical structure. The heating portion is provided with a plurality of recessed portions and / or a plurality of raised portions. The recessed portions are bent radially inwardly along the cylindrical structure, and the raised portions are bent radially outwardly along the cylindrical structure. The electrode portion is connected to the heating portion, and the electrode portion is used to be electrically connected to a power supply. The heating element of the present application is provided with recessed portions and / or raised portions in the heating portion. The recessed portions and / or raised portions are bent radially inwardly or outwardly toward the cylindrical structure to form a bent or curved structure. The bent structure or curved structure can cause secondary radiation of heat to achieve the effect of secondary utilization of heat, thereby increasing the local temperature at the recessed portions and / or raised portions, reducing the convective heat loss between the heating element and the air, and improving the atomization explosiveness and TPM. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is a schematic structural diagram of an atomization device provided in one embodiment of the present application;

[0023] FIG2 is a schematic diagram of the explosion structure of FIG1 ;

[0024] FIG3 is a schematic structural diagram of a heating element provided in one embodiment of the present application;

[0025] FIG4 is a schematic structural diagram of the heating element in FIG3 after being unfolded;

[0026] FIG5 is a schematic diagram of a portion of the structural surface of a heating element provided in one embodiment of the present application;

[0027] FIG6 is a schematic diagram of a portion of the structural surface of a heating element provided in another embodiment of the present application;

[0028] FIG7 is a schematic diagram of a portion of the structural surface of a heating element provided in yet another embodiment of the present application. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] Component numbers used herein, such as "first" and "second," are used solely to distinguish the components 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).

[0032] The present application provides an atomizing device that can be used to atomize an aerosol-generating substrate. The atomizing device includes a heating element 10 for heating and atomizing the aerosol-generating substrate to generate an aerosol. The heating element 10 can be any of the heating elements 10 described in the following embodiments.

[0033] The atomizing device may further include a battery for powering the heating element 10; alternatively, the atomizing device may be detachably assembled with and electrically connected to a power supply component. Of course, in some embodiments, the atomizing device may be integrally provided with the power supply component. The power supply component may be a battery, which powers the heating element 10. The atomizing device may further include a controller, or the atomizing device may be electrically connected to a controller of an external power supply component. Upon receiving a start signal, the controller controls the battery to power the heating element 10 and controls the power and duration of the heating of the heating element 10.

[0034] As shown in Figures 1 and 2, the atomizing device may further include a liquid storage part 20, a sleeve 30 and a liquid guide part 40. The liquid storage part 20 is used to store an aerosol-generating matrix, which may be, for example, tobacco oil, liquid medicine, etc. The liquid storage part 20 is usually a porous structure. For example, the liquid storage part 20 may be oil-storing cotton, porous ceramics, etc. The liquid storage part 20, the sleeve 30 and the heating part 10 may all be cylindrical structures, with a cavity inside the cylindrical structure, and both ends of the cavity are open. Furthermore, the outer shape of the cylindrical structure is cylindrical, and the cavity inside the cylindrical structure is also cylindrical. The liquid storage part 20, the sleeve 30, the heating part 10 and the liquid guide part 40 are nested in sequence from the outside to the inside.

[0035] The sleeve 30 is provided with a liquid inlet 31, and the two sides of the liquid inlet 31 are connected to the heating element 10 and the liquid storage element 20 respectively. In one embodiment, the number of the liquid inlet holes 31 can be multiple, for example, at least two. When the number of the liquid inlet holes 31 is large, the oil change efficiency of the atomizing device can be improved. As shown in FIG2 , the multiple liquid inlet holes 31 can be evenly distributed in an array along the circumferential direction on the sleeve 30. Furthermore, the aerosol generating matrix is ​​atomized into an aerosol in the sleeve 30, and one end of the sleeve 30 is an aerosol outlet 32 ​​of the sleeve 30, and the other end of the sleeve 30 has an air inlet 33. The sleeve 30 is provided with multiple liquid inlet holes 20 on one side close to the air inlet 33, that is, the multiple liquid inlet holes 31 can be distributed only in the middle and lower part of the sleeve 30 as shown in FIG2 , and the heating element 10 is provided at one end of the sleeve 30 where the liquid inlet hole 31 is provided. The air inlet 33 of the sleeve 30 can be connected to the air inlet of the atomizing device, and the aerosol outlet 32 ​​of the sleeve 30 can be connected to the air outlet of the atomizing device. This allows airflow to enter the interior of the sleeve 30 from the air inlet 33 of the sleeve 30 through the air inlet of the atomizing device. After carrying the aerosol atomized within the sleeve 30, it flows from the aerosol outlet 32 ​​of the sleeve 30 into the air outlet of the atomizing device, and finally flows out of the atomizing device to be inhaled by the user. The liquid inlet 31 is located at the end of the sleeve 30 near the air inlet 33 to ensure that the aerosol-generating substrate is fully atomized into an aerosol, preventing the liquid in the liquid storage member 20 from leaking into the interior of the sleeve 30 over a large area, thereby causing the user to inhale the oil.

[0036] The liquid guide 40 can be positioned within the cylindrical structure of the heater 10. It can direct the aerosol-generating substrate to various locations on the heater 10, thereby increasing the flow rate of the liquid on the inner surface of the heater 10 and thereby improving the energy utilization and atomization efficiency of the heater 10. In one embodiment, the liquid guide 40 has a porous structure that can absorb substances such as tobacco oil and allow airflow to pass through the pores of the liquid guide 40. For example, the liquid guide 40 can be a liquid-conducting cotton ball.

[0037] As shown in Figures 3-7, the present application also provides a heating element 10. The heating element 10 includes a heating portion 11 and an electrode portion 14. The heating portion 11 is wound and enclosed to form a cylindrical structure, that is, the heating portion 11 in Figure 4 can form a cylindrical structure as shown in Figure 3 after being wound. After the heating element 10 atomizes the aerosol-generating matrix on its surface into aerosol, the aerosol will pass through the liquid guide 40 inside the cylindrical structure and eventually flow out of the atomization device with the airflow for use by the user.

[0038] Generally, the heating portion 11 includes a main heating portion 50 and a wiring portion 12. The main heating portion 50 may include, for example, a recessed portion 111 and / or a raised portion 112, as described below, and a main body portion 1139. There are two wiring portions 12, one of which is connected to one circumferential end of the main heating portion 50, and the other of which is connected to the other circumferential end of the main heating portion 50. The wiring portion 12 is connected to the electrode portion 14, so that when the electrode portion 14 is connected to the heating portion 11, the electrode portion 14 is used to electrically connect to a power source, allowing current to flow through the heating portion 11 in a circumferential direction, so that the heating portion 11 can generate heat when energized, thereby heating the aerosol-generating substrate to generate aerosol.

[0039] The heating portion 11 is provided with a plurality of recessed portions 111 and / or a plurality of raised portions 112. With reference to FIG3 and FIG5-FIG7 , the upper side of the figures in FIG5-FIG7 can be regarded as the inner side of the cylindrical structure of the heating element 10, and the lower side of the figures can be regarded as the outer side of the cylindrical structure of the heating element 10. That is, in the figures in FIG5-FIG7 , the lines close to the inner side are the inner surface of the heating element 10, and the lines close to the outer side are the outer surface of the heating element 10.

[0040] As shown in Figures 3 and 5-7, the recessed portion 111 of the heating part 11 is bent inwardly along the radial direction of the cylindrical structure, that is, a part of the structure of the heating part 11 is recessed toward the inside of the cylindrical structure to form the recessed portion 111. In Figures 3, 5 and 7, no raised portion 112 is provided, while in Figure 6, a raised portion 112 is provided, and the raised portion 112 of the heating part 11 is bent outwardly along the radial direction of the cylindrical structure, that is, a part of the structure of the heating part 11 protrudes toward the outside of the cylindrical structure to form the raised portion 112. Usually, when making the recessed portion 111 or the raised portion 112 on the heating part 11, the recessed portion 111 or the raised portion 112 can be formed by stamping on the smooth heating part 11.

[0041] The heating element 10 of the present application is provided with a recessed portion 111 and / or a raised portion 112 in the heating portion 11. Since both the recessed portion 111 and the raised portion 112 are bent or curved structures formed by the surface depression of the cylindrical structure, the bent structure or curved structure can cause secondary radiation of heat to achieve the effect of secondary utilization of heat, thereby increasing the local temperature at the recessed portion 111 and / or the raised portion 112, reducing the convective heat loss between the heating element 10 and the air entering the interior of the heating element from the air inlet 33 of the sleeve, improving the atomization explosiveness and TPM, and can be suitable for high-power atomization devices of 12W-15W.

[0042] In addition, when the heating element 10 has a recessed portion 111, the recessed portion 111 can be inserted into the liquid guiding member 40 inside the heating element 10, so that the connection between the heating element 10 and the liquid guiding member 40 is more stable and tight, thereby promoting the liquid guidance and atomization of the aerosol generating matrix in the liquid guiding member 40.

[0043] In one embodiment, the plurality of recessed portions 111 or the plurality of raised portions 112 are spaced apart (e.g., as shown in FIG5 ). That is, if the heating portion 11 is provided with only the plurality of recessed portions 111, the plurality of recessed portions 111 are spaced apart; if the heating portion 11 is provided with only the plurality of raised portions 112, the plurality of raised portions 112 are spaced apart.

[0044] When the heat generating portion 11 is provided with a plurality of recessed portions 111 and a plurality of raised portions 112 , the recessed portions 111 may be spaced apart, the raised portions 112 may be spaced apart, and the recessed portions 111 and the raised portions 112 may also be spaced apart.

[0045] Of course, in other embodiments, multiple recesses 111 or multiple protrusions 112 may be arranged in a continuous connection, or multiple recesses 111 and multiple protrusions 112 may be arranged in a continuous connection (as shown in FIG6 ). Alternatively, a portion of the recesses 111 may be arranged at intervals, while another portion of the recesses 112 may be arranged in a continuous connection. A portion of the protrusions 112 may be arranged at intervals, while another portion of the protrusions 112 may be arranged in a continuous connection. A portion of the recesses 111 and a portion of the protrusions 112 may be arranged at intervals, while another portion of the recesses 111 and a portion of the protrusions 112 may be arranged in a continuous connection. The arrangement of the recesses 111 and the protrusions 112 may be configured as needed and is not limited to the above-mentioned arrangement.

[0046] In one embodiment, the recessed portions 111 and the raised portions 112 are alternately arranged. Alternation may refer to alternating in a regular manner such as ABAB, AABBAABB, etc., or may refer to alternating in an irregular manner.

[0047] In any of the above embodiments, a plurality of recessed portions 111 or a plurality of raised portions 112 may be arranged in an arrangement, or a plurality of recessed portions 111 and a plurality of raised portions 112 may be arranged in an arrangement, wherein the arrangement refers to an arrangement forming one horizontal row or multiple horizontal rows or one vertical row or multiple vertical rows. For example, a plurality of recessed portions 111 or a plurality of raised portions 112 may be arranged in an alternating arrangement, or, among a plurality of recessed portions 111 and a plurality of raised portions 112, the recessed portions 111 and the raised portions 112 may be arranged in an alternating arrangement. The arrangement may be a uniform arrangement, and the uniform arrangement of the recessed portions 111 and / or raised portions 112 is beneficial for the heating element 10 to have atomization explosive force at all positions in the axial and circumferential directions, which is beneficial for further improving the atomization explosive force of the heating element 10.

[0048] The shape, structure and size of each recessed portion 111 or each raised portion 112 may be the same or different, or may be partially the same and partially different. The same parts include differences due to factors such as production tolerances. The structure of the recessed portion 111 or the raised portion 112 may be a curved structure, such as a U-shaped structure, or the recessed portion 111 or the raised portion 112 may include a first wall 118 and a second wall 119 relative to each other, the first wall 118 and the second wall 119 being planes, the first wall 118 and the second wall 119 being connected and facing each other so that the first wall 118 and the second wall 119 can radiate relative to each other, and the first wall 118 and the second wall 119 may be at least one of a plane and a curved surface.

[0049] Referring to FIG5 , when the recessed portion 111 or the raised portion 112 includes a first wall 118 and a second wall 119, the first wall 118 and the second wall 119 form an angle, which can be between 10° and 130°, for example, 10° or 130°. Within this angle range, the first wall 118 and the second wall 119 are relatively closer, resulting in a better radiation effect and a stronger atomization burst.

[0050] In one embodiment, as shown in Figures 4 and 5, the heating portion 11 further includes a main body 1139, which connects the recessed portion 111 and / or the raised portion 112, and is parallel to the axis of the tubular structure. By providing the main body 1139, it is ensured that at least a portion of the heating portion 11 can be completely attached to the inner surface of the sleeve 30, facilitating the flow of the aerosol-generating substrate to the surface of the heating portion 11. Furthermore, the fact that the main body 1139 is parallel to the axis of the tubular structure indicates that the surface of the main body 1139 is a regular plane, facilitating the flow of the aerosol-generating substrate on the heating portion 11, thereby guiding the flow of the aerosol-generating substrate.

[0051] Among them, the main body 1139 connecting the recessed portion 111 and / or the raised portion 112 may mean that: among multiple recessed portions 111, adjacent recessed portions 111 are connected through the main body 1139, or, among multiple raised portions 112, adjacent raised portions 112 are connected through the main body 1139, or, among multiple recessed portions 111 and multiple raised portions 112, the recessed portions 111 and the raised portions 112 are connected through the main body 1139, or, one or more recessed portions 111 and one or more raised portions 112 are grouped as a group, and each group can be connected through the main body 1139.

[0052] In one embodiment, as shown in Figure 4, the heating part 11 can be a mesh structure. The heating part 11 includes a plurality of heating units 113. For example, in Figures 3 and 4, a heating unit 113 is a rhombus. A hollow hole 114 is provided on the heating unit 113, and a plurality of heating units 113 are arranged in an array and interconnected to form a mesh structure. The hollow holes 114 allow the aerosol-generating matrix to diffuse from the outer surface of the heating part 11 to the inner surface of the heating part 11, thereby increasing the atomization area of ​​the heating element 10. The mesh structure formed by the heating units 113 being arranged in an array and connected to each other can enhance the connectivity between the heating units 113 to improve the heat transfer efficiency, thereby improving the TPM of the atomization device.

[0053] In one embodiment, at least one heating unit 113 includes a recessed portion 111 and / or a raised portion 112. For example, in Figures 3 and 4, each heating unit 113 includes a recessed portion 111. In Figure 5, the portion between the dotted line A and the dotted line B can be regarded as a heating unit 113, and each heating unit 113 includes a recessed portion 111. In Figure 6, the portion between the dotted line A and the dotted line B is regarded as a first heating unit 1131 having a raised portion 112, and the portion between the dotted line B and the dotted line C is regarded as a second heating unit 1132 having a recessed portion 111. Figure 6 is a schematic diagram of the alternating connection of the first heating unit 1131 having a recessed portion 111 and the second heating unit 1132 having a raised portion 112.

[0054] In one embodiment, at least portions of adjacent heating units 113 may be connected to form a recessed portion 111 or a raised portion 112. For example, in FIG7 , the structure between dotted line A and dotted line B is the third heating unit 1133, and the structure between dotted line B and dotted line C is the fourth heating unit 1134. The third heating unit 1133 and the fourth heating unit 1134 are connected to form a recessed portion 111.

[0055] In one embodiment, as shown in FIG4 , the heating unit 113 includes a first heating portion 1135, a second heating portion 1136, a third heating portion 1137, and a fourth heating portion 1138, and the first heating portion 1135, the second heating portion 1136, the third heating portion 1137, and the fourth heating portion 1138 are connected end to end in a rhombus. Each rhombus includes an upper endpoint 15, a lower endpoint 16, a left endpoint 17, and a right endpoint 18, and each adjacent rhombus can be connected at the endpoints. When the recessed portion 111 or the raised portion 112 includes a first wall 118 and a second wall 119, the first wall 118 and the second wall 119 are connected and arranged facing each other, and the upper endpoint 15 and the lower endpoint 16, the left endpoint 17, or the right endpoint 18 of the rhombus structure are located at the connection between the first wall 118 and the second wall 119. Of course, in other embodiments, the heating unit 113 may not be a rhombus, but may be other shapes.

[0056] In one embodiment, as shown in Figures 3 and 4 , the heating element 10 includes multiple rows of heating unit groups 19 along the axial direction of the heating element 10. Each row of heating unit groups 19 includes multiple heating units 113 connected in sequence along the circumferential direction of the heating element 10. Compared to a single row of heating unit groups 19 in the prior art, multiple rows of heating unit groups 19 allow the heating element 10 to be longer in the axial direction, thereby increasing the radiation area of ​​the actual heating region and achieving high-power heating characteristics.

[0057] In one embodiment, as shown in Figure 4, the heating part includes a main heating part 50 and a wiring part 12. The main heating part 50 may, for example, include the recessed part 111 and / or raised part 112 and the main body part 1139 mentioned above. A heat-resistant stress hole 115 is provided at the connection between the main heating part 50 and the wiring part 12. By providing the heat-resistant stress hole 115, the problem of fatigue fracture of the edge of the heating element 10 caused by thermal deformation during the heating process of the heating element 10 can be improved.

[0058] In one embodiment, as shown in FIG4 , the heating element 10 includes a main heating portion 50 and a plurality of heat conducting portions 13 . Along the axial direction of the heating element 10 , the main heating portion 50 has a first end 116 and a second end 117 opposite each other. The heat conducting portions 13 are connected to the first end 116 and / or the second end 117 of the main heating portion 50 , and extend along the axial direction of the heating element 10 . Excess heat from the heating portion 11 can flow from the heating portion 11 to the heat conducting portions 13 , thereby improving the heat utilization rate of the heating element 10 and increasing the atomization amount of the atomization device.

Claims

1. A heating element, characterized in that: The heating element comprises: A heating portion, the heating portion is wound and enclosed to form a cylindrical structure, the heating portion is provided with a plurality of recessed portions and / or a plurality of raised portions, the recessed portions are bent inwardly along the radial direction of the cylindrical structure, and the raised portions are bent outwardly along the radial direction of the cylindrical structure; and an electrode portion connected to the heating portion.

2. The heating element according to claim 1, characterized in that The plurality of recessed portions or the plurality of raised portions are arranged at intervals; or, among the plurality of recessed portions and the plurality of raised portions, the recessed portions and the raised portions are arranged alternately.

3. The heating element according to claim 2, characterized in that: The heating portion further comprises a main body portion, the main body portion is connected to the recessed portion and / or the raised portion, and the main body portion is parallel to the axial direction of the cylindrical structure.

4. The heating element according to claim 1, characterized in that: The heating part is a mesh structure; the heating part includes a plurality of heating units, each of which is provided with hollow holes, and the plurality of heating units are arranged in an array and interconnected to form the mesh structure.

5. The heating element according to claim 4, characterized in that The heating unit is a diamond-shaped structure, and each adjacent diamond-shaped structure is connected by an endpoint; the diamond-shaped structure includes an upper endpoint, a lower endpoint, a left endpoint, and a right endpoint, and the recessed portion or the raised portion includes a first wall surface and a second wall surface, the first wall surface and the second wall surface are connected and arranged opposite to each other, and the upper endpoint and the lower endpoint or the left endpoint or the right endpoint of the diamond-shaped structure are located at the connection between the first wall surface and the second wall surface.

6. The heating element according to any one of claims 1 to 4, characterized in that: The recessed portion or the raised portion includes a first wall surface and a second wall surface, the first wall surface and the second wall surface are connected and arranged opposite to each other, or the recessed portion or the raised portion is a curved surface structure.

7. The heating element according to claim 6, characterized in that The recessed portion or the raised portion includes a first wall surface and a second wall surface, the first wall surface and the second wall surface form an angle, and the angle is 10°-130°.

8. The heating element according to claim 4, characterized in that Along the axial direction of the heating element, the heating element includes a plurality of rows of heating unit groups, and each row of the heating unit groups includes a plurality of heating units sequentially connected along the circumferential direction of the heating element.

9. The heating element according to claim 1, characterized in that: The heating part comprises a main heating part and a wiring part, the main heating part is provided with a plurality of recessed parts and / or raised parts, the electrode part is connected to the wiring part, and a heat stress resistant hole is provided at the connection between the main heating part and the wiring part.

10. The heating element according to claim 1, characterized in that The heating part includes a main heating part and a plurality of heat-conducting parts, the main heating part is provided with a plurality of recessed parts and / or raised parts, and along the axial direction of the heating element, the main heating part has a first end and a second end opposite to each other, the heat-conducting part is connected to the first end and / or the second end of the main heating part, and the heat-conducting part extends along the axial direction of the heating element.

11. An atomizing device, characterized in that: Comprising the heating element as described in any one of claims 1-10.

12. An atomizing device according to claim 11, characterized in that: It also includes a liquid storage component, a sleeve and a liquid guiding component, wherein the liquid storage component, the sleeve, the heating component and the liquid guiding component are nested in sequence from the outside to the inside, a liquid inlet hole is provided on the sleeve, and the two sides of the liquid inlet hole are respectively connected to the heating component and the liquid storage component, and the heat-generating part of the heating component is provided with a plurality of recessed parts, and at least part of the recessed parts is inserted into the liquid guiding component.

13. An atomizing device according to claim 12, characterized in that: The aerosol generating matrix is ​​atomized into an aerosol in the sleeve, one end of the sleeve is the aerosol outlet of the sleeve, the other end of the sleeve is provided with an air inlet, a side of the sleeve close to the air inlet is provided with a plurality of liquid inlet holes, and the heating element is provided at one end of the sleeve where the liquid inlet holes are provided.

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