Heating structure and aerosol generating device

Abstract

The utility model discloses a heating structure and an aerosol generating device, the heating structure comprises a heat exchange part and a heating part, the heat exchange part comprises a containing pipe and a heat exchange part connected to one axial end of the containing pipe, the containing pipe is provided with a containing cavity used for containing an aerosol generating substrate, and the heat exchange part is used for being in contact with the aerosol generating substrate; the heat exchange part is provided with a heat exchange air channel used for guiding airflow to enter the containing cavity. The heating piece comprises a heating part and an electromagnetic coil, at least part of the heating part is embedded in the heat exchange part, the electromagnetic coil is wound around the periphery of the heat exchange part, and the electromagnetic coil is used for providing an alternating magnetic field to enable the heating part to heat; at least part of the heating part is embedded in the heat exchange part, so that heat of the heating part can be directly transmitted to the heat exchange part and transmitted to airflow flowing through the heat exchange air channel through the heat exchange part, and compared with the scheme that the heating part is arranged outside the heating pipe, the heat loss of the heating part can be reduced, the temperature of the heat exchange part can be increased, and the service life of the heating pipe is prolonged. And the heating effect of hot airflow is improved.

Description

Technical Field

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

[0002] The aerosol generating device heats the aerosol generating substrate by heating without burning, so that the aerosol generating substrate generates aerosol. There are two heating methods for the aerosol generating device. One is to directly transfer heat to the aerosol generating substrate by using a heating needle or a heating tube to directly contact the aerosol generating substrate; the other is to set a heat exchanger upstream of the aerosol generating substrate in the direction of gas flow, and set a heating element on the outer peripheral surface of the heating tube outside the heat exchanger. The heating element transfers heat to the heat exchanger through the heating tube. The heat exchanger heats the airflow flowing through the heat exchange airway, and the hot airflow then transfers heat to the aerosol generating substrate.

[0003] The method of heating the aerosol generating substrate with hot air flow can avoid direct contact between the heat source and the aerosol generating substrate, avoid excessive local heating of the aerosol generating substrate, and help reduce the temperature difference of the aerosol generating substrate; however, when using the above-mentioned hot air flow heating method, the temperature of the heat exchanger is low and the heating effect of the bottom hot air flow is poor. Utility Model Content

[0004] The present application provides a heating structure and an aerosol generating device to solve the technical problem of poor heating effect when using a hot air flow heating method.

[0005] According to the first aspect, an embodiment provides a heating structure, comprising:

[0006] The heat exchange member comprises a receiving tube and a heat exchange portion connected to one axial end of the receiving tube, the receiving tube having a receiving cavity for accommodating an aerosol generating substrate, the heat exchange portion being used to contact the aerosol generating substrate, and the heat exchange portion having a heat exchange airway for guiding an airflow into the receiving cavity;

[0007] The heating element comprises a heating part and an electromagnetic coil. At least a part of the heating part is embedded in the heat exchange part. The electromagnetic coil is wound around the periphery of the heat exchange part. The electromagnetic coil can be used to provide an alternating magnetic field to make the heating part generate heat.

[0008] In an optional embodiment, the heat exchange part has a mounting groove, the mounting groove is communicated with the receiving cavity, and the heat generating part is embedded in the mounting groove.

[0009] In an optional embodiment, the installation groove is an annular groove arranged in the circumferential direction of the receiving tube, or the installation groove includes a plurality of arc grooves arranged at intervals in the circumferential direction of the receiving tube.

[0010] In an optional embodiment, in the radial direction of the receiving tube, the mounting groove and the heat exchange air duct are arranged at intervals.

[0011] In an optional embodiment, in the axial direction of the receiving tube, the end surface of the heating portion facing the receiving cavity is used to contact the aerosol generating substrate.

[0012] In an optional embodiment, in the axial direction of the receiving tube, the end surface of the heating portion facing the receiving cavity is flush with the end surface of the heat exchange portion facing the receiving cavity.

[0013] In an optional embodiment, the heat exchange air passage is located on the inner side of the heat generating portion in the radial direction of the receiving cavity.

[0014] In an optional embodiment, the heat exchange component further includes a drainage pipe, which is connected to an end of the heat exchange portion facing away from the receiving tube in the axial direction of the receiving tube; the drainage pipe has a drainage cavity for guiding airflow into the heat exchange airway.

[0015] In an optional embodiment, at least a portion of the heat-generating portion is made of carbon steel, and / or at least a portion of the heat-exchanging portion is made of at least one of aluminum oxide, silicon carbide, and aluminum nitride.

[0016] According to the second aspect, an embodiment provides an aerosol generating device, comprising a device body and a heating structure as described above, wherein an air inlet channel and an air outlet channel are formed in the device body, and the heating structure is installed in the device body, and the heating structure connects the air inlet channel and the air outlet channel.

[0017] According to the heating structure and aerosol generating device of the above-mentioned embodiments, the heating structure includes a heat exchange element and a heating element, the heat exchange element includes a receiving tube and a heat exchange part connected to one axial end of the receiving tube, the receiving tube has a receiving cavity for accommodating an aerosol generating substrate, the heat exchange part is used to contact the aerosol generating substrate, and the heat exchange part has a heat exchange air duct for guiding the airflow into the receiving cavity; the heating element includes a heating part and an electromagnetic coil, at least part of the heating part is embedded in the heat exchange part, the electromagnetic coil is wound around the periphery of the heat exchange part, and the electromagnetic coil is used to provide an alternating magnetic field to make the heating part generate heat; since at least part of the heating part is embedded in the heat exchange part, the heat of the heating part can be directly transferred to the heat exchange part, and then transferred from the heat exchange part to the airflow flowing through the heat exchange air duct, compared with the scheme of arranging the heating element outside the heating tube, the heat loss of the heating part can be reduced, which helps to increase the temperature of the heat exchange part and improve the heating effect of the hot airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of an aerosol generating device in an embodiment;

[0019] Figure 2 A schematic diagram of the internal structure of an aerosol generating device after being cut open in one embodiment;

[0020] Figure 3 It is a schematic diagram of the internal structure of the heating structure in an aerosol generating device after being cut open in one embodiment (excluding the electromagnetic coil).

[0021] In the figure: 1. heat exchange member; 11. receiving tube; 111. receiving chamber; 12. heat exchange part; 121. heat exchange airway; 122. mounting groove; 13. drainage tube; 131. drainage chamber; 21. heating part; 22. electromagnetic coil; 3. aerosol generating matrix; 4. outer shell; 41. air inlet; 42. air outlet; 3. skeleton; 4. positioning ring; 5. atomizing tube; 51. outer tube; 6. connecting tube; 7. air inlet member; 8. air inlet connector. DETAILED DESCRIPTION

[0022] The present application is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0023] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations, and the operation steps involved in each embodiment can also be replaced or adjusted in a sequence 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 certain embodiment and do not mean that the composition and / or sequence are necessary.

[0024] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0025] The embodiment of the present application discloses a heating structure, which can be used in an aerosol generating device to provide a heat source for heating an aerosol generating substrate 3 .

[0026] The heating structure of the embodiment of the present application includes a heat exchange element 1 and a heating element. The heat exchange element 1 includes a receiving tube 11 and a heat exchange portion 12 connected to one axial end of the receiving tube 11. The receiving tube 11 has a receiving cavity 111 for accommodating the aerosol generating matrix 3. The heat exchange portion 12 is used to contact the aerosol generating matrix 3. The heat exchange portion 12 has a heat exchange airway 121 for guiding the airflow into the receiving cavity 111; the heating element includes a heating portion 21 and an electromagnetic coil 22. At least a portion of the heating portion 21 is embedded in the heat exchange portion 12. The electromagnetic coil 22 is wound around the periphery of the heat exchange portion 12. The electromagnetic coil 22 is used to provide an alternating magnetic field to make the heating portion 21 heat up.

[0027] Since at least part of the heating part 21 is embedded in the heat exchange part 12, the heat of the heating part 21 can be directly transferred to the heat exchange part 12, and then transferred by the heat exchange part 12 to the airflow flowing through the heat exchange air duct 121. Compared with the solution of arranging the heating element outside the heating tube, this can reduce the heat loss of the heating part 21, help to increase the temperature of the heat exchange part 12, and improve the heating effect of the hot airflow on the aerosol generating matrix 3.

[0028] In one embodiment, please refer to Figure 2 and Figure 3 In the heat exchanger 1, the receiving tube 11 can be integrally formed with the heat exchange part 12. The material of the receiving tube 11 is the same as that of the heat exchange part 12. The receiving tube 11 and the heat exchange part 12 are processed by the same process. Of course, in other embodiments, the receiving tube 11 can also be connected to the heat exchange part 12 through a connecting member. For example, the connecting member can be a connecting ring. The connecting ring has mounting grooves at both ends of the axial direction. The receiving tube 11 and the heat exchange part 12 are respectively installed in the mounting grooves to achieve the connection between the receiving tube 11 and the heat exchange part 12.

[0029] In some embodiments, at least a portion of the heat exchange portion 12 is made of at least one of aluminum oxide, silicon carbide, and aluminum nitride. For example, the heat exchange portion 12 may be formed of aluminum oxide, or may be formed of silicon carbide or aluminum nitride, or the heat exchange portion 12 may be formed by a mixture of two or three of aluminum oxide, silicon carbide, and aluminum nitride. It may also be provided that only the portion of the heat exchange portion 12 located on the inner side of the heating portion 21 in the radial direction of the receiving tube 11 is made of the above-mentioned materials.

[0030] For some examples, please refer to Figure 2 and Figure 3The heat exchange portion 12 is connected to an opening at one axial end of the receiving tube 11, and a receiving cavity 111 for accommodating the aerosol generating substrate 3 is formed inside the receiving tube 11. The aerosol generating substrate 3 can be inserted into the receiving cavity 111 from the other end opening of the receiving tube 11; in the axial direction of the receiving tube 11, the surface of the heat exchange portion 12 facing the receiving cavity 111 forms the bottom wall surface of the receiving cavity 111. After the aerosol generating substrate 3 and the heating structure are inserted into place, the heat exchange portion 12 contacts the aerosol generating substrate 3 to heat the aerosol generating substrate 3 by direct heating.

[0031] Please continue to refer to Figure 2 and Figure 3 The heat exchange part 12 is generally cylindrical, and the heat exchange part 12 is coaxial with the receiving tube 11. The outer peripheral surface of the heat exchange part 12 is continuous with the outer peripheral surface of the receiving tube 11 in the axial direction of the receiving tube 11. This facilitates the integral molding of the entire heat exchange component 1 on the one hand, and facilitates the assembly of the entire heat exchange component 1 in the aerosol generating device on the other hand; of course, in other embodiments, the heat exchange part 12 can also be generally prism-shaped. In the radial direction of the receiving tube 11, the heat exchange part 12 has an outer side surface protruding from the outer peripheral surface of the receiving tube 11. There are multiple heat exchange air channels 121 on the heat exchange part 12, and the multiple heat exchange air channels 121 all extend in the axial direction of the receiving tube 11. The multiple heat exchange air channels 121 are all connected to the receiving chamber 111, so that the hot air flow heated by the heat exchange part 12 is conveniently guided along the heat exchange air channels 121 into the receiving chamber 111, so as to achieve heating of the aerosol generating matrix 3.

[0032] The electromagnetic coil 22 in the heating element extends in the axial direction of the receiving tube 11. The electromagnetic coil 22 is located outside the heat exchange part 12 in the radial direction of the receiving tube 11. The electromagnetic coil 22 is sleeved on the heat exchange part 12 to provide an alternating magnetic field for the heating part 21 at least partially embedded in the heat exchange part 12.

[0033] In some embodiments, at least a portion of the heating portion 21 is made of carbon steel, the heating portion 21 may be made entirely of carbon steel, or the heating portion 21 may contain carbon steel material, so that the heating portion 21 has magnetism and can generate heat in the alternating magnetic field generated by the electromagnetic coil 22. Alternatively, the heating portion 21 may be made of other magnetic materials, as long as the heating portion 21 can generate heat in the alternating magnetic field.

[0034] In some embodiments, at least part of the heating portion 21 is embedded in the heat exchange portion 12. The heating portion 21 may be fully embedded in the heat exchange portion 12, such as during the integral molding of the heat exchange element 1 or the molding of the heat exchange portion 12, so that the heating portion 21 is not visible from the surface of the heat exchange portion 12; or please refer to Figure 3A mounting groove 122 may be provided on the heat exchange part 12 so that the heating part 21 is installed in the mounting groove 122. The heating part 21 and the mounting groove 122 are interference fit or the heating part 21 is fixed in the mounting groove 122 by ceramic glue. In this way, the heating part 21 is installed in the heat exchange part 12, which can effectively prevent the heating part 21 from being separated from the entire heat exchange part 12.

[0035] The heating part 21 can also be partially embedded in the heat exchange part 12. For example, in addition to the part embedded in the heat exchange part 12, the heating part 21 also has a part extending into the receiving cavity 111 in the axial direction of the receiving tube 11. This part can be used to penetrate into the aerosol generating matrix 3 in the groove to achieve heating of the aerosol generating matrix 3.

[0036] In this way, the structure in which at least part of the heating part 21 is embedded in the heat exchange part 12 can achieve direct contact between the heat exchange part 12 and the heating part 21, and the heat generated by the heating part 21 can be directly transferred to the heat exchange part 12, which can effectively reduce the loss of heat in the process of heat transfer between the heating part 21 and the heat exchange part 12, increase the temperature of the heat exchange part 12, and improve the heating effect of the hot air flow on the aerosol generating matrix 3.

[0037] Please refer to Figure 2 and Figure 3 In an embodiment in which a mounting groove 122 is provided on the heat exchange portion 12, the mounting groove 122 extends in the axial direction of the receiving tube 11, and the mounting groove 122 is communicated with the receiving cavity 111, the heating portion 21 is assembled in the mounting groove 122, and the heating portion 21 and the groove wall surface of the mounting groove 122 are interference fit to limit the heating portion 21 from escaping from the mounting groove 122.

[0038] In one embodiment, please refer to Figure 2 and Figure 3 The mounting groove 122 may be an annular groove arranged in the circumferential direction of the receiving tube 11, and the corresponding heating portion 21 may be an annular structure continuously arranged in the circumferential direction of the receiving tube 11, or the heating portion 21 may also include a plurality of arc structures, and the plurality of arc structures are arranged at intervals in the circumferential direction of the receiving tube 11.

[0039] Of course, in other embodiments, the mounting groove 122 may also be a plurality of arc grooves spaced apart in the circumferential direction of the receiving tube 11, or the mounting groove 122 may also be a square or elliptical groove arranged around the axis of the receiving tube 11, and the shape of the corresponding heating portion 21 matches the shape of the mounting groove 122.

[0040] In one embodiment, the mounting groove 122 in the heat exchange portion 12 is staggered with the heat exchange air passage 121 in the radial direction of the receiving tube 11, so that the heat exchange portion 21 can be prevented from directly contacting the airflow and causing a high local airflow temperature. Of course, in other embodiments, in embodiments where heating uniformity is not considered, the mounting groove 122 can also be arranged to communicate with the heat exchange air passage 121, such as at least a portion of the heat exchange portion 21 is embedded in the mounting groove 122, and the side wall surface of the heat exchange portion 21 forms the wall surface of the heat exchange air passage 121.

[0041] In one embodiment, please refer to Figure 3 The mounting groove 122 has an inner groove wall surface close to the axis of the receiving tube 11 in the radial direction of the receiving tube 11, and also has an outer groove wall surface away from the axis of the receiving tube 11. The outer groove wall surface of the mounting groove 122 is arranged on the inner side of the inner wall surface of the receiving tube 11 in the radial direction of the receiving tube 11, so that the strength of the entire heat exchange part 12 can be improved, and the damage of the entire heat exchange part 1 caused by insufficient strength of the heat exchange element 1 at the position of the mounting groove 122 can be avoided.

[0042] Of course, in other embodiments, the outer groove wall surface of the installation groove 122 can also be flush with the inner wall surface of the receiving tube 11 in the axial direction of the receiving tube 11, so as to facilitate the production of the processing mold of the heat exchange component 1.

[0043] In one embodiment, please refer to Figure 3 In the radial direction of the receiving tube 11, the heat exchange air channel 121 is located on the inner side of the mounting groove 122, that is, on the inner side of the heating part 21, which helps to increase the area of ​​the heating surface on the heating part 21, thereby increasing the heat generated by the heating part 21, further increasing the temperature of the heat exchange element 1, and improving the heating effect of the hot air flow on the aerosol generating matrix 3.

[0044] In other embodiments, a portion of the multiple heat exchange air ducts 121 are located on the inner side of the heating portion 21 in the radial direction of the receiving tube 11, and another portion is located on the outer side of the heating portion 21. This can also increase the temperature of the heat exchange element 1 and improve the heating effect of the hot air flow on the aerosol generating matrix 3.

[0045] In some embodiments, for the heating portion 21, please refer to Figure 2 and Figure 3 In the axial direction of the receiving tube 11, the end surface of the heating portion 21 facing the receiving cavity 111 is used to contact the aerosol generating substrate 3. For example, the end surface of the heating portion 21 facing the receiving cavity 111 may be flush with the end surface of the heat exchange portion 12 facing the receiving cavity 111, and the end surface of the heating portion 21 facing the receiving cavity 111 may directly contact the aerosol generating substrate 3 to achieve heating of the aerosol generating substrate 3.

[0046] Of course, in the embodiment where part of the heating portion 21 is embedded in the heat exchange portion 12, the end surface of the heating portion 21 facing the receiving cavity 111 can also protrude from the end surface of the heat exchange portion 12 facing the receiving cavity 111. For example, the heating portion 21 has two parts in the axial direction of the receiving tube 11, one part is embedded in the heat exchange portion 12, and the other part extends into the receiving cavity 111, so that after the aerosol generating matrix 3 is inserted into the receiving cavity 111, the heating portion 21 extending into the receiving cavity 111 penetrates into the aerosol generating matrix 3, thereby heating the aerosol generating matrix 3 by direct contact.

[0047] Of course, in other embodiments, if the heating part 21 is integrally formed in the heat exchange part 12 and the entire heating part 21 is wrapped in the heat exchange part 12, or the size of the heating part 21 in the axial direction of the receiving tube 11 is smaller than the size of the mounting groove 122, and after the heating part 21 is installed in the mounting groove 122, in an embodiment in which the distance between the end face of the heating part 21 facing the receiving cavity 111 and the receiving cavity 111 is greater than zero, the heating part 21 may not contact the aerosol generating substrate 3, and only heat the aerosol generating substrate 3 by means of hot air flow.

[0048] For some embodiments, please continue to refer to Figure 2 and Figure 3 The heat exchange element 1 also includes a drainage pipe 13, which can be coaxially arranged with the receiving tube 11. The radial dimension of the drainage pipe 13 can be equal to the radial dimension of the receiving tube 11. In the axial direction of the receiving tube 11, the drainage pipe 13 is connected to the end of the heat exchange part 12 that is away from the receiving tube 11. The heat exchange part 12 is located at the opening at one end of the drainage pipe 13. A drainage cavity 131 is formed inside the drainage pipe 13. The drainage cavity 131 is connected to the heat exchange airway 121 on the heat exchange part 12. The airflow can enter the drainage cavity 131 through the opening at the other end of the drainage pipe 13 and be drained into the heat exchange airway 121 by the drainage cavity 131.

[0049] In other embodiments, the heat exchange element 1 may not be provided with the drainage tube 13 , and the airflow may directly enter the heat exchange air passage 121 , and enter the receiving cavity 111 after being heated.

[0050] The present application also provides an aerosol generating device, please refer to Figure 1 and Figure 2 The aerosol generating device includes a device body and a heating structure in any of the above embodiments, an air inlet channel and an air outlet channel are formed in the device body, and the heating structure is installed in the device body. The heating structure can connect the air inlet channel and the air outlet channel to realize the flow of air in the aerosol generating device.

[0051] Specifically, please refer to Figure 1 and Figure 2The device body includes a frame 3 and a shell 4 installed on the frame 3. The shell 4 has an air inlet 41 connected to the air inlet channel and an air outlet 42 connected to the air outlet channel. The air outlet 42 is also an insertion port for the aerosol generating matrix 3.

[0052] The device body also includes an atomizing tube 5 and a connecting tube 6 located in the outer shell 4 and installed on the skeleton 3. The internal channel of the connecting tube 6 can form at least a part of the air inlet channel; for example, the connecting tube 6 can be directly connected to the air inlet port 41, so that the internal channel of the connecting tube 6 forms the air inlet channel; or the device body also includes an air inlet component 7 and an air inlet connector 8. The air inlet component 7 is installed on the skeleton 3. The air inlet component 7 has an internal channel connected to the air inlet port 41. The air inlet component 7 is also connected to the connecting tube 6 via the air inlet connector 8. The internal channel of the air inlet component 7, the internal channel of the air inlet connector 8 and the internal channel of the connecting tube 6 form the air inlet channel of the entire aerosol generating device.

[0053] The internal channel of the atomizer tube 5 can form at least a part of the air outlet channel; for example, the atomizer tube 5 can be directly connected to the air outlet 42, so that the internal channel of the atomizer tube 5 forms the air outlet channel; or the device body also includes a positioning ring 4, the positioning ring 4 is located at the position of the air outlet 42, the positioning ring 4 is positioned and installed on the skeleton 3, one end of the atomizer tube 5 is positioned and installed on the skeleton 3 through the positioning ring 4, and the internal space formed by the internal channel of the atomizer tube 5 and the positioning ring 4 forms the air outlet channel of the entire aerosol generating device.

[0054] The heat exchanger 1 is extended and arranged in the axial direction of the receiving tube 11. The heat exchanger 1 has two openings arranged in the axial direction of the receiving tube 11. One opening can be the air flow inlet of the drainage chamber 131, or it can also be the air inlet of the heat exchange air duct 121, and the other opening is the aerosol generating matrix 3 socket of the receiving chamber 111. The two openings of the heat exchanger 1 are sealed and inserted with the atomizing tube 5 and the connecting tube 6 respectively, and the electromagnetic coil 22 is clamped between the atomizing tube 5 and the connecting tube 6, so as to realize the fixation of the position of the heating structure in the device body.

[0055] The atomizing tube 5 has an outer tube portion 51 located outside the heating structure in the radial direction of the containing tube 11. The outer tube portion 51 is sealed with the connecting tube 6, so that the heating structure is sealed in the space enclosed by the atomizing tube 5 and the connecting tube 6. On the one hand, heat insulation can be achieved through the air cavity between the outer tube portion 51 and the heat exchange element 1, and on the other hand, the overflow of the internal airflow of the heat exchange element 1 can be reduced.

[0056] The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, deformations or substitutions can be made based on the idea of ​​the present invention.

Claims

1. A heating structure, characterized in that: include: The heat exchange member comprises a receiving tube and a heat exchange portion connected to one axial end of the receiving tube, the receiving tube having a receiving cavity for accommodating an aerosol generating substrate, the heat exchange portion being used to contact the aerosol generating substrate, and the heat exchange portion having a heat exchange airway for guiding an airflow into the receiving cavity; The heating element comprises a heating part and an electromagnetic coil. At least a part of the heating part is embedded in the heat exchange part. The electromagnetic coil is wound around the periphery of the heat exchange part. The electromagnetic coil is used to provide an alternating magnetic field to make the heating part generate heat.

2. The heating structure according to claim 1, characterized in that: The heat exchange part has a mounting groove, the mounting groove is communicated with the receiving cavity, and the heat generating part is embedded in the mounting groove.

3. The heating structure according to claim 2, characterized in that: The installation groove is an annular groove arranged in the circumferential direction of the receiving tube, or the installation groove includes a plurality of arc-shaped grooves arranged at intervals in the circumferential direction of the receiving tube.

4. The heating structure according to claim 2, characterized in that: In the radial direction of the receiving tube, the mounting groove and the heat exchange air passage are arranged at intervals.

5. The heating structure according to claim 1, characterized in that: In the axial direction of the receiving tube, the end surface of the heating portion facing the receiving cavity is used to contact the aerosol generating substrate.

6. The heating structure according to claim 5, characterized in that: In the axial direction of the accommodation tube, an end surface of the heat generating portion facing the accommodation cavity is flush with an end surface of the heat exchanging portion facing the accommodation cavity.

7. The heating structure according to any one of claims 1 to 6, characterized in that: The heat exchange air passage is located inside the heat generating portion in the radial direction of the receiving cavity.

8. The heating structure according to any one of claims 1 to 6, characterized in that: The heat exchange component further comprises a drainage pipe, which is connected to an end of the heat exchange portion facing away from the receiving tube in the axial direction of the receiving tube; the drainage pipe has a drainage cavity for guiding airflow into the heat exchange airway.

9. The heating structure according to any one of claims 1 to 6, characterized in that: At least a portion of the heat generating portion is made of carbon steel, and / or at least a portion of the heat exchanging portion is made of one of aluminum oxide, silicon carbide or aluminum nitride.

10. An aerosol generating device, characterized in that: It comprises a device body and a heating structure as described in any one of claims 1 to 9, wherein an air inlet channel and an air outlet channel are formed in the device body, the heating structure is installed in the device body, and the heating structure connects the air inlet channel and the air outlet channel.

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