Electromagnetic heating assembly and aerosol generating device

Abstract

The application provides an electromagnetic heating assembly and an aerosol generating device, and belongs to the technical field of aerosol generation. The aerosol generating device comprises an electromagnetic heating assembly and an electric core. The electromagnetic heating assembly comprises an insulating cylinder. An inner cavity of the insulating cylinder is a heating cavity for inserting an aerosol generating rod. One end of the insulating cylinder has an insertion opening for the aerosol generating rod to enter the heating cavity. A magnetic core is cast and fixed in a circumferential side wall of the insulating cylinder surrounding the heating cavity. An induction coil is arranged on the circumferential side wall of the insulating cylinder surrounding the heating cavity. The induction coil is located on a side of the magnetic core opposite to the heating cavity. The electric core is used for supplying power to the electromagnetic heating assembly. The magnetic core is reliably fixed in the insulating cylinder by casting and fixing, so as to ensure that the electromagnetic heating assembly can reliably work.

Description

Technical Field

[0001] This application relates to the field of aerosol generation technology, specifically to an electromagnetic heating component and an aerosol generation device. Background Technology

[0002] The aerosol generating device includes a heating component that heats the aerosol matrix to generate an aerosol for the user to inhale.

[0003] One type of aerosol generating device is used in conjunction with an aerosol generating rod. The heating element of this type of device has a heating cavity into which the aerosol generating rod is inserted. One feasible method for generating heat in this heating element is electromagnetic heating. Such heating elements generally include an insulating substrate, which is a tubular structure, with its inner cavity forming the heating cavity for the aerosol generating rod. To achieve electromagnetic heating, a magnetic core is typically placed on the inner wall of the tubular insulating substrate, and an induction coil is wound around the outside of the insulating substrate. When the induction coil is energized, eddy currents are generated within the magnetic core, increasing its temperature and thus heating the aerosol matrix. It is crucial that the magnetic core be reliably mounted on the insulating substrate to prevent it from detaching and affecting the normal operation of the electromagnetic heating element. Utility Model Content

[0004] This application provides an electromagnetic heating assembly that enables reliable fixation of a magnetic core at a target installation position; this application also provides an aerosol generating device having the above-mentioned electromagnetic heating assembly.

[0005] In a first aspect, this application provides an electromagnetic heating assembly for an aerosol generation device, comprising:

[0006] An insulating cylinder, wherein the inner cavity of the insulating cylinder is a heating chamber for inserting an aerosol generating rod, and one end of the insulating cylinder has an insertion port for the aerosol generating rod to enter the heating chamber;

[0007] A magnetic core, which is cast and sealed within the circumferential sidewall of the heating cavity formed by the insulating cylinder;

[0008] And an induction coil, wound around the circumferential sidewall of the heating cavity formed by the insulating cylinder;

[0009] The induction coil is located on the side of the magnetic core facing away from the heating cavity.

[0010] In one embodiment, the distance between the magnetic core and the inner wall surface of the circumferential sidewall is less than the distance between the magnetic core and the outer wall surface of the circumferential sidewall.

[0011] In one embodiment, the magnetic core has a sidewall facing the heating cavity, projected orthogonally along the extension direction of the centerline of the insulating cylinder, the projection of the sidewall coincides at least partially with the projection of the inner wall of the circumferential sidewall.

[0012] In one embodiment, the induction coil is cast and sealed within the circumferential sidewall of the insulating cylinder.

[0013] In one embodiment, the wire wound into the induction coil is a flat wire, and the cross-section of the flat wire has a smaller dimension in the direction of the thickness of the circumferential sidewall than the dimension of the cross-section in the direction of the extension of the center line of the insulating cylinder.

[0014] In one embodiment, the wall of the heating chamber includes a support portion and an air passage portion. The support portion is used to contact the outer peripheral surface of the aerosol generating rod to limit and heat the aerosol generating rod in the wall thickness direction of the circumferential sidewall. The air passage portion is used to space with the outer peripheral surface of the aerosol generating rod to form an airflow channel between the air passage portion and the aerosol generating rod. The edge of the insertion port is at least partially spaced with the aerosol generating rod to form an air inlet communicating with the airflow channel between the edge and the aerosol generating rod.

[0015] In one embodiment, the heating cavity has an elliptical cross-sectional profile, and the portion of the inner wall of the heating cavity located at both ends of the minor axis of the ellipse constitutes the support portion.

[0016] In one embodiment, the insulating cylinder has a bottom at the other end opposite to the insertion port, and the bottom has a support structure for supporting the aerosol generating rod, so that the air inlet end of the aerosol generating rod can communicate with the airflow channel.

[0017] In one embodiment, the electromagnetic heating assembly further includes an assembly shell, the insulating cylinder is disposed inside the assembly shell, the assembly shell has a shell hole corresponding to the insertion port, the projection outline of the shell hole coincides with the projection outline of the insertion port when projected orthogonally along the direction in which the aerosol generating rod is inserted into the heating chamber, the shell hole has a limiting structure for supporting the aerosol generating rod, and the limiting structure is misaligned with the supporting portion along the circumferential direction of the insertion port and the shell hole.

[0018] Secondly, this application provides an aerosol generating device, including an electromagnetic heating assembly, the electromagnetic heating assembly comprising:

[0019] An insulating cylinder, wherein the inner cavity of the insulating cylinder is a heating chamber for inserting an aerosol generating rod, and one end of the insulating cylinder has an insertion port for the aerosol generating rod to enter the heating chamber;

[0020] A magnetic core, which is cast and sealed within the circumferential sidewall of the heating cavity formed by the insulating cylinder;

[0021] And an induction coil, wound around the circumferential sidewall of the heating cavity formed by the insulating cylinder;

[0022] The induction coil is located on the side of the magnetic core facing away from the heating cavity;

[0023] The aerosol generating device also includes a battery cell for supplying power to the electromagnetic heating assembly.

[0024] In one embodiment, the distance between the magnetic core and the inner wall surface of the circumferential sidewall is less than the distance between the magnetic core and the outer wall surface of the circumferential sidewall.

[0025] In one embodiment, the magnetic core has a sidewall facing the heating cavity, projected orthogonally along the extension direction of the centerline of the insulating cylinder, the projection of the sidewall coincides at least partially with the projection of the inner wall of the circumferential sidewall.

[0026] In one embodiment, the induction coil is cast and sealed within the circumferential sidewall of the insulating cylinder.

[0027] In one embodiment, the wire wound into the induction coil is a flat wire, and the cross-section of the flat wire has a smaller dimension in the direction of the thickness of the circumferential sidewall than the dimension of the cross-section in the direction of the extension of the center line of the insulating cylinder.

[0028] In one embodiment, the wall of the heating chamber includes a support portion and an air passage portion. The support portion is used to contact the outer peripheral surface of the aerosol generating rod to limit and heat the aerosol generating rod in the wall thickness direction of the circumferential sidewall. The air passage portion is used to space with the outer peripheral surface of the aerosol generating rod to form an airflow channel between the air passage portion and the aerosol generating rod. The edge of the insertion port is at least partially spaced with the aerosol generating rod to form an air inlet communicating with the airflow channel between the edge and the aerosol generating rod.

[0029] In one embodiment, the heating cavity has an elliptical cross-sectional profile, and the portion of the inner wall of the heating cavity located at both ends of the minor axis of the ellipse constitutes the support portion.

[0030] In one embodiment, the insulating cylinder has a bottom at the other end opposite to the insertion port, and the bottom has a support structure for supporting the aerosol generating rod, so that the air inlet end of the aerosol generating rod can communicate with the airflow channel.

[0031] In one embodiment, the electromagnetic heating assembly further includes an assembly shell, the insulating cylinder is disposed inside the assembly shell, the assembly shell has a shell hole corresponding to the insertion port, the projection outline of the shell hole coincides with the projection outline of the insertion port when projected orthogonally along the direction in which the aerosol generating rod is inserted into the heating chamber, the shell hole has a limiting structure for supporting the aerosol generating rod, and the limiting structure is misaligned with the supporting portion along the circumferential direction of the insertion port and the shell hole.

[0032] According to the aerosol generating device in the above embodiments, when the induction coil of the electromagnetic heating component is energized, eddy currents are generated in the magnetic core, causing the temperature of the magnetic core to rise, thereby heating the aerosol generating rod inserted into the heating chamber. Since the magnetic core is set in the insulating cylinder by casting and sealing, the magnetic core is reliably fixed in the insulating cylinder, ensuring that the electromagnetic heating component can work reliably. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of the aerosol generating device and the aerosol generating rod in some embodiments of this application;

[0034] Figure 2 It is along Figure 1 Sectional view of line AA in the middle;

[0035] Figure 3 This is a cross-sectional view of an aerosol generating apparatus in some embodiments of this application;

[0036] Figure 4 This is a cross-sectional view of the electromagnetic heating component of the aerosol generating apparatus in some embodiments of this application;

[0037] Figure 5 for Figure 2 A magnified view of a section at point B in the middle;

[0038] Figure 6 This is a top view of the insulating cylinder of the aerosol generating apparatus in some embodiments of this application;

[0039] Figure 7 This is a top view schematic diagram of the aerosol generating device and aerosol generating rod in combination in some embodiments of this application.

[0040] List of feature names corresponding to the labels in the figure:

[0041] 1. Aerosol generating device; 11. Outer shell; 111. Outer shell opening; 12. Electromagnetic heating assembly; 121. Insulating cylinder; 1211. Heating chamber; 1212. Circumferential side wall; 12121. Inner wall surface; 1213. Insertion port; 1214. Cylinder bottom; 1215. Support structure; 122. Magnetic core; 1221. Side wall surface; 123. Induction coil; 124. Airflow channel; 125. Air inlet; 126. Assembly shell; 1261. Shell hole; 1262. Limiting structure; 127. Upper silicone pad; 13. Battery cell; 14. Bracket; 15. Lower silicone pad; 16. Base;

[0042] 2. Aerosol generating rod; 21. Cardboard tube; 22. Aerosol matrix; 23. Air inlet end. Detailed Implementation

[0043] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0044] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0045] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0046] The embodiments described in the detailed implementation can be combined in any suitable manner without contradiction. For example, different implementation methods can be formed by combining different embodiments. In order to avoid unnecessary repetition, the various possible combinations of the embodiments will not be described separately.

[0047] Please refer to Figure 1and Figure 2 This application provides an aerosol generating device 1, which is used in conjunction with an aerosol generating rod 2. In use, a portion of the aerosol generating rod 2 is inserted into the aerosol generating device 1, while the other portion protrudes from the aerosol generating device 1. The end of the protruding portion is a suction end for the user to inhale.

[0048] For the structure of aerosol generating rod 2, please refer to [reference needed]. Figure 2 Generally, the aerosol generating rod 2 has a cylindrical structure with an outer cardboard tube 21 containing an aerosol matrix 22. In use, the section of the aerosol generating rod 2 containing the aerosol matrix 22 is inserted into the aerosol generating device 1. The aerosol generating device 1 heats the aerosol matrix 22 to generate aerosol. The end of the aerosol generating rod 2 inserted into the aerosol generating device 1 is the air inlet 23. When the user inhales the aerosol generating rod 2, air can enter the aerosol generating rod 2 through the air inlet 23, carrying with it the aerosol generated by the heated aerosol matrix 22 for the user to inhale. More detailed information regarding the structure of the aerosol generating rod 2 and the composition of the aerosol matrix 22 is prior art and will not be elaborated upon here.

[0049] Please refer to Figure 2 and Figure 3 The aerosol generating device 1 includes a housing 11 and an electromagnetic heating assembly 12 disposed within the housing 11, and also includes a battery cell 13 for supplying power to the electromagnetic heating assembly 12.

[0050] For the structure of the electromagnetic heating component 12, please refer to [reference needed]. Figure 3 and Figure 4 The electromagnetic heating assembly 12 includes an insulating cylinder 121, the inner cavity of which is a heating chamber 1211. For ease of description, the direction in which the aerosol generating rod 2 is inserted into the aerosol generating device 1 is defined as the up-down direction, and the aerosol generating rod 2 is inserted into the aerosol generating device 1 from top to bottom. Of course, the up-down direction defined here is not used to limit the usage posture of the aerosol generating device 1, but only to facilitate a static description of the structure of the aerosol generating device 1. In actual use, the posture of the aerosol generating device 1 is not fixed or unique, and the posture of the aerosol generating device 1 changes dynamically with the user's hand movements during use.

[0051] Please refer to Figure 3 and Figure 4The insulating cylinder 121 has a circumferential sidewall 1212 surrounding the heating chamber 1211. The upper end of the insulating cylinder 121 has an insertion port 1213 for the aerosol generating rod 2 to enter the heating chamber 1211. Corresponding to the insertion port 1213, the outer shell 11 has an outer shell opening 111, which faces the insertion port 1213. The aerosol generating rod 2 enters the heating chamber 1211 through the outer shell opening 111 and the insertion port 1213. The aerosol matrix 22 inside the aerosol generating rod 2 is heated to generate aerosol within the heating chamber 1211. To ensure that outside air can enter the aerosol generating device 1, the outer shell opening 111 is larger than the cross-section of the aerosol generating rod 2, allowing outside air to enter the aerosol generating device 1 through the gap between the edge of the outer shell opening 111 and the aerosol generating rod 2.

[0052] To achieve the heating function, the electromagnetic heating assembly 12 also includes a magnetic core 122 and an induction coil 123. To ensure reliable mounting of the magnetic core 122 on the insulating cylinder 121 and prevent it from falling off, in this application, the magnetic core 122 is cast and sealed within the circumferential sidewall 1212 of the insulating cylinder 121. The magnetic core 122 being sealed within the circumferential sidewall 1212 means that the magnetic core 122 has no portion extending or protruding relative to the circumferential sidewall 1212. In some embodiments, the insulating cylinder 121 is a ceramic cylinder. During the casting and molding stage of the ceramic cylinder, the magnetic core 122 is placed in the corresponding mold cavity to cast and seal the magnetic core 122 within the ceramic cylinder. The porosity of the ceramic is less than 20%. The ceramic can be silica ceramic, zirconia ceramic, etc. In other embodiments, the insulating cylinder 121 can also be a glass cylinder.

[0053] The magnetic core 122 is made of metal, such as SPCE (cold-rolled carbon steel sheet and strip for deep drawing), 316 stainless steel, 45 steel, etc. The induction coil 123 is made of copper wire or aluminum wire, spirally wound on the insulating cylinder 121, and located on the side of the magnetic core 122 facing away from the heating cavity 1211. When working, an alternating current is passed through the induction coil 123 to generate an alternating magnetic field, which causes eddy currents to be generated inside the metal magnetic core 122 and generates heat energy to heat the aerosol generating rod 2.

[0054] Regarding the shape of the magnetic core 122, in some embodiments, the magnetic core 122 is cylindrical, so that the magnetic core 122 is arranged around the insulating cylinder 121, giving the heating cavity 1211 a larger heating area. In other embodiments, the magnetic core 122 can also be a sheet structure. To adapt to the shape of the insulating cylinder 121, the magnetic core 122 is specifically set as an arc-shaped sheet structure.

[0055] Regarding the number of magnetic cores 122 and induction coils 123, please refer to [reference needed] in some embodiments. Figure 3The electromagnetic heating assembly 12 includes two sets of magnetic cores 122 and induction coils 123. In some other embodiments, the number of magnetic cores 122 and induction coils 123 can be increased or decreased according to actual needs. For example, only one set can be set, or more than two sets can be set, such as three sets or four sets.

[0056] Since the heat source of the electromagnetic heating assembly 12 is the magnetic core 122, and the aerosol generating rod 2 inserted into the heating chamber 1211 is the object to be heated, in order to reduce the distance between the heat source and the object to be heated, in some embodiments, please refer to... Figure 3 and Figure 4 The distance between the magnetic core 122 and the inner wall surface 12121 of the circumferential sidewall 1212 is less than the distance between the magnetic core 122 and the outer wall surface of the circumferential sidewall 1212. That is, in the wall thickness direction of the circumferential sidewall 1212, the magnetic core 122 is biased closer to the heating cavity 1211 in the circumferential sidewall 1212. In some embodiments, please refer to Figure 4 The magnetic core 122 has a sidewall surface 1221 facing the heating cavity 1211. When projected orthographically along the extension direction (i.e., the vertical direction) of the centerline of the insulating cylinder 121, the projection of the sidewall surface 1221 coincides with the projection of the inner wall surface 12121 of the circumferential sidewall 1212. That is, the internal wall of the cylindrical component composed of the magnetic core 122 and the insulating cylinder 121 is partially formed by the inner wall surface 12121 of the circumferential sidewall 1212 and partially by the sidewall surface 1221 of the magnetic core 122. In the case where the magnetic core 122 is an arc-shaped sheet structure, the projection of the sidewall surface 1221 partially coincides with the projection of the inner wall surface 12121 of the circumferential sidewall 1212.

[0057] By casting and sealing the magnetic core 122 inside the insulating cylinder 121, not only can the magnetic core 122 be reliably fixed on the insulating cylinder 121, but the size of the insulating cylinder 121 and the magnetic core 122 can also be avoided from overlapping. This makes the size of the cylindrical component composed of the insulating cylinder 121 and the magnetic core 122 only the size of the insulating cylinder 121 itself, which can reduce the size of the electromagnetic heating assembly 12 and facilitate the miniaturization of the electromagnetic heating assembly 12.

[0058] In some embodiments, please refer to Figure 3 and Figure 4 The induction coil 123 is also cast and sealed within the circumferential sidewall 1212 of the insulating cylinder 121. This avoids the superposition of the dimensions of the induction coil 123 and the circumferential sidewall 1212 of the insulating cylinder 121 in the wall thickness direction. Furthermore, to further miniaturize the electromagnetic heating assembly 12, the wire wound into the induction coil 123 is a flat wire. The cross-sectional dimension of the flat wire in the wall thickness direction of the circumferential sidewall 1212 is smaller than its dimension in the direction extending from the centerline of the insulating cylinder 121 (i.e., the vertical direction). In some embodiments, please refer to... Figure 4The end face of the flat conductor is rectangular; in some other embodiments, the end face of the flat conductor may also be elliptical. Of course, in some other embodiments, the cross-section of the conductor wound into the induction coil 123 may also be circular.

[0059] In some embodiments, please refer to Figure 4 The insulating cylinder 121 also has a bottom 1214, that is, the end of the insulating cylinder 121 facing away from the insertion port 1213 is a closed structure, which can prevent the condensate in the heating chamber 1211 from flowing to other parts of the aerosol generating device 1 and causing pollution.

[0060] To ensure that air can enter the aerosol generating rod 2 during suction, please refer to... Figure 2 and Figure 5 An airflow channel 124 is formed between the insulating cylinder 121 and the aerosol generating rod 2. In order to form the airflow channel 124 while ensuring the heating rate of the aerosol generating rod 2, the cavity wall of the heating chamber 1211 includes a support portion and an air passage portion. The support portion contacts the outer peripheral surface of the aerosol generating rod 2 to limit and contact the aerosol generating rod 2 in the wall thickness direction of the circumferential side wall 1212. The air passage portion is spaced and fitted with the outer peripheral surface of the aerosol generating rod 2, forming the airflow channel 124 between the air passage portion and the aerosol generating rod 2.

[0061] In order for external air to enter the airflow channel 124, the edge of the insertion port 1213 is at least partially fitted with the aerosol generating rod 2 at a distance, so as to form an air inlet 125 communicating with the airflow channel 124 between the edge of the insertion port 1213 and the aerosol generating rod 2.

[0062] In some embodiments, please refer to Figure 6 The insulating cylinder 121 has an elliptical cross-section, making the heating chamber 1211 also elliptical in shape. The minor axis a of the ellipse is approximately equal to the outer diameter of the aerosol generating rod 2. Naturally, the major axis b is larger than the outer diameter of the aerosol generating rod 2. Thus, after the aerosol generating rod 2 is inserted into the heating chamber 1211, the portion of the chamber wall at both ends of the minor axis a of the ellipse forms a support portion. This support portion contacts the aerosol generating rod 2, limiting its position while simultaneously transferring heat through it. Based on the circular cross-section of the aerosol generating rod 2, the portion of the heating chamber wall not directly contacting the aerosol generating rod 2 forms an airflow channel 124. In other embodiments, the cross-sectional profile of the heating chamber 1211 can also be non-circular, such as triangular, with the circular cross-section of the aerosol generating rod 2 internally tangent to the triangle, so that the chamber wall of the heating chamber 1211 has both a support portion and an airflow channel portion.

[0063] To prevent the air inlet 23 from being blocked after the aerosol generating rod 2 is inserted into the heating chamber 1211, in some embodiments, please refer to... Figure 4 and Figure 6 The insulating cylinder 121 also includes a support structure 1215 disposed at the bottom 1214 of the cylinder. Specifically, the support structure 1215 consists of multiple protrusions disposed at the junction of the bottom 1214 and the circumferential sidewall 1212, with a gap between adjacent protrusions allowing air to pass through, so that the air inlet 23 of the aerosol generating rod 2 can communicate with the airflow channel 124. In some other embodiments, the support structure 1215 may also be a support mesh disposed at the bottom of the heating chamber 1211, with the support mesh spaced apart from the bottom 1214 of the cylinder.

[0064] In some other embodiments, the lower end of the insulating cylinder 121 may also be an open structure, the cross-section of the heating chamber 1211 is a circle with a cross-sectional size equivalent to that of the aerosol generating rod 2, and an airflow channel 124 is formed on the outside of the insulating cylinder 121. During suction, air enters the aerosol generating rod through the opening at the lower end of the insulating cylinder 121 and the air inlet 23 of the aerosol generating rod 2.

[0065] Furthermore, in some embodiments, please refer to Figure 3 and Figure 4 The electromagnetic heating component 12 also includes a component housing 126, which is also a cylindrical structure. An insulating cylinder 121 is disposed inside the component housing 126, and an upper silicone gasket 127 is disposed between the upper end of the insulating cylinder 121 and the component housing 126 for a sealed fit. The aerosol generating device 1 also includes a bracket 14, a lower silicone gasket 15, and a base 16 disposed inside the outer casing 11. The lower end of the insulating cylinder 121 is mounted on the bracket 14 via the lower silicone gasket 15 and the base 16.

[0066] In some embodiments, please refer to Figure 3 and Figure 4 The component housing 126 has a housing hole 1261 aligned with the insertion port 1213 and the outer housing port 111, and in the vertical direction, the housing hole 1261 is located between the outer housing port 111 and the insertion port 1213. Projected vertically, the projected outline of the housing hole 1261 coincides with the projected outline of the insertion port 1213. Taking the heating chamber 1211 as an example where the cross-section is elliptical, the housing hole 1261 is also an elliptical hole, and its size is consistent with that of the insertion port 1213. Thus, the edge of the housing hole 1261 is also partially spaced from the aerosol generating rod 2, facilitating the flow of outside air to the air inlet 125.

[0067] To ensure the stability of the aerosol generating rod 2 on the aerosol generating device 1, a limiting structure 1262 for supporting the aerosol generating rod 2 is provided at the shell hole 1261. Along the circumferential direction of the insertion port 1213 and the shell hole 1261, the limiting structure 1262 is offset from the supporting portion of the heating chamber 1211 wall, thereby providing multi-point support for the aerosol generating rod 2 in the circumferential direction. In some embodiments, based on the elliptical structure of the shell hole 1261, the limiting structure 1262 is positioned at a location corresponding to the major axis of the elliptical shell hole 1261. The limiting structure 1262 is a protrusion on the component shell 126 that protrudes from the edge of the shell hole 1261 towards the center of the shell hole 1261.

[0068] For information on the airflow path when the user inhales the aerosol generator 2, please refer to [reference needed]. Figure 2 , Figure 5 and Figure 7 As shown by the middle arrow, firstly, outside air enters the aerosol generating device 1 through the gap between the edge of the outer shell opening 111 and the aerosol generating rod 2, and then flows through the shell hole 1261 located beside the limiting structure 1262 to the air inlet 125. It then enters the airflow channel 124 through the air inlet 125, flows along the airflow channel 124 to the bottom of the heating chamber 1211, and changes direction at the bottom of the heating chamber 1211. It then enters the aerosol generating rod 2 through the air inlet end 23 of the aerosol generating rod 2, and carries the aerosol generated by the heating of the aerosol matrix 22, which is then inhaled by the user.

[0069] This application also provides an electromagnetic heating component for an aerosol generating apparatus. The electromagnetic heating component has the same structure and operation as the electromagnetic heating component 12 of the aerosol generating apparatus in the above embodiments, and will not be described again here.

[0070] The above examples illustrate this application only to aid understanding and are not intended to limit its scope. Those skilled in the art to which this application pertains can make various simple deductions, modifications, or substitutions based on the ideas presented.

Claims

1. An electromagnetic heating component for use in an aerosol generating device, characterized in that, include: An insulating cylinder, wherein the inner cavity of the insulating cylinder is a heating chamber for inserting an aerosol generating rod, and one end of the insulating cylinder has an insertion port for the aerosol generating rod to enter the heating chamber; A magnetic core, which is cast and sealed within the circumferential sidewall of the heating cavity formed by the insulating cylinder; And an induction coil, wound around the circumferential sidewall of the heating cavity formed by the insulating cylinder; The induction coil is located on the side of the magnetic core facing away from the heating cavity.

2. The electromagnetic heating assembly as described in claim 1, characterized in that, The distance between the magnetic core and the inner wall surface of the circumferential sidewall is less than the distance between the magnetic core and the outer wall surface of the circumferential sidewall.

3. The electromagnetic heating assembly as described in claim 2, characterized in that, The magnetic core has a sidewall facing the heating cavity, which is orthographically projected along the extension direction of the center line of the insulating cylinder, and the projection of the sidewall coincides at least partially with the projection of the inner wall of the circumferential sidewall.

4. The electromagnetic heating assembly as described in claim 1, characterized in that, The induction coil is cast and sealed within the circumferential sidewall of the insulating cylinder.

5. The electromagnetic heating assembly as described in claim 1, characterized in that, The wire wound into the induction coil is a flat wire, and the cross-section of the flat wire is smaller in the direction of the thickness of the circumferential side wall than in the direction of the extension of the center line of the insulating cylinder.

6. The electromagnetic heating assembly as described in any one of claims 1-5, characterized in that, The heating chamber wall includes a support portion and an air passage portion. The support portion is used to contact the outer peripheral surface of the aerosol generating rod to limit and heat the aerosol generating rod in the wall thickness direction of the circumferential sidewall. The air passage portion is used to space with the outer peripheral surface of the aerosol generating rod to form an airflow channel between the air passage portion and the aerosol generating rod. The edge of the insertion port can at least partially space with the aerosol generating rod to form an air inlet communicating with the airflow channel between the edge and the aerosol generating rod.

7. The electromagnetic heating assembly as described in claim 6, characterized in that, The heating cavity has an elliptical cross-sectional profile, and the portion of the inner wall of the heating cavity located at both ends of the minor axis of the ellipse constitutes the support portion.

8. The electromagnetic heating assembly as described in claim 6, characterized in that, The insulating cylinder has a bottom at the other end opposite to the insertion port. The bottom of the cylinder has a support structure for supporting the aerosol generating rod, so that the air inlet end of the aerosol generating rod can communicate with the airflow channel.

9. The electromagnetic heating assembly as described in claim 6, characterized in that, The electromagnetic heating assembly further includes an assembly shell, and the insulating cylinder is disposed inside the assembly shell. The assembly shell has a shell hole corresponding to the insertion port. The projection of the shell hole onto the direction in which the aerosol generating rod is inserted into the heating chamber coincides with the projection of the insertion port. The shell hole has a limiting structure for supporting the aerosol generating rod, and the limiting structure is misaligned with the supporting portion along the circumferential direction of the insertion port and the shell hole.

10. An aerosol generating device, characterized in that, include: An electromagnetic heating assembly, wherein the electromagnetic heating assembly is the electromagnetic heating assembly as described in any one of claims 1-9; The battery cell is used to supply power to the electromagnetic heating assembly.

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