Aerosol generating device

Abstract

The utility model discloses an aerosol generating device which comprises a shell and a heating body, the heating body is arranged in the shell, and a heating cavity is formed in the heating body; a first airflow channel is formed in the shell, the air inlet end of the first airflow channel communicates with the outer side of the shell, and the air outlet end of the first airflow channel communicates with the heating cavity; at least part of an extension path of the first airflow channel in the extension direction is a curve; a plurality of convex teeth are arranged on the inner wall of the first airflow channel and are arranged at intervals in the extending direction of the first airflow channel, and at least two convex teeth are located on the two opposite sides in the first airflow channel and are arranged in a staggered mode, so that every two convex teeth define a bent airflow path together, the length of the airflow path is increased, and the heat exchange coefficient is increased; the heat conduction efficiency is improved. Therefore, cold air passing through the first airflow channel can enter the heating cavity to be in contact with the heating body after being preheated, energy consumption of the heating body is reduced, and the electric quantity of a battery is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of aerosol generation, in particular to an aerosol generating device. Background Art

[0002] Existing heat-not-burn aerosol generating devices generally adopt bottom air intake or top air intake methods. The cold air directly contacts the heating element and directly takes away the heat of the heating element, resulting in low energy utilization of the heating element, high energy consumption, and poor battery life. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide an improved aerosol generating device in view of at least one defect of the above-mentioned prior art.

[0004] The technical solution adopted by the present invention to solve the technical problem is as follows: providing an aerosol generating device, which includes a housing and a heating element, wherein the heating element is arranged inside the housing, and a heating cavity is formed inside the heating element;

[0005] A first air flow channel is provided inside the housing, an air inlet end of the first air flow channel is communicated with the outside of the housing, and an air outlet end of the first air flow channel is communicated with the heating chamber;

[0006] The first airflow channel has an extension direction, and an extension path of the first airflow channel along the extension direction is at least partially curved;

[0007] The inner wall of the first air flow channel is provided with a plurality of protruding teeth.

[0008] In some embodiments, the plurality of protruding teeth are arranged at intervals along the extension direction of the first airflow channel, and / or at least two of the plurality of protruding teeth are located on opposite sides of the first airflow channel and are staggered.

[0009] In some embodiments, a portion of at least one of the protruding teeth extends into a gap between two other adjacent protruding teeth on the opposite side.

[0010] In some embodiments, along the extension direction of the first airflow channel, the intervals between adjacent protruding teeth are equal or unequal.

[0011] In some embodiments, along the extension direction of the first air flow channel, the spacing between the protruding teeth is distributed as dense in the middle and sparse on both sides, sparse in the middle and dense on both sides, or sparse and dense alternatingly.

[0012] In some embodiments, the aerosol generating device also includes a shell, which is arranged inside the outer shell, and the heating element is arranged inside the shell; the shell includes a first cylinder and a second cylinder, and the first cylinder is arranged on the periphery of the second cylinder and is connected to the second cylinder; the first air flow channel is defined between the outer wall surface of the second cylinder and the inner wall surface of the first cylinder, and a first air vent is provided on the first cylinder to connect the inside and outside of the first cylinder, and the first air vent is connected to the air inlet end of the first air flow channel.

[0013] In some embodiments, a groove is provided on the outer wall of the second cylinder, the first air flow channel is defined between the groove and the inner wall of the first cylinder, and the protruding teeth are disposed in the groove.

[0014] In some embodiments, a second vent hole is formed on the second cylinder, and the air outlet end of the first air flow channel and the heating chamber are connected through the second vent hole.

[0015] In some embodiments, the heating element includes a ceramic substrate, a protective layer and a heating layer; the ceramic substrate is tubular and can allow infrared light to pass through, and the inner side of the ceramic substrate defines a heating cavity for accommodating an aerosol generating matrix; the protective layer is arranged on the tube wall of the ceramic substrate, and is coated on the heating layer. The heating layer can heat the aerosol generating matrix by radiating infrared light waves. The thickness of the protective layer is less than the thickness of the tube wall of the ceramic substrate, and the thermal conductivity of the protective layer is lower than the thermal conductivity of the ceramic substrate.

[0016] In some embodiments, the heating layer includes an infrared film and a second heating film; the infrared film is arranged on the outer side of the ceramic substrate; the second heating film is arranged on the infrared film, and the protective layer is covered on the second heating film and the outer periphery of the infrared film; or, the infrared film is arranged on the inner side of the ceramic substrate, the second heating film is arranged on the outer side of the ceramic substrate, and the protective layer is covered on the outer periphery of the second heating film; or, the heating layer includes an infrared second heating film that actively generates heat and radiates infrared light when powered on, and the infrared second heating film is arranged on the outer side or inner side of the ceramic substrate.

[0017] The present invention has at least the following beneficial effects: Because the first airflow channel extends at least partially along a curved path along its extension direction, and because a plurality of protruding teeth are provided on the inner wall of the first airflow channel, the airflow path length and the surface area of ​​the inner surface of the first airflow channel are increased, thereby increasing the heat transfer area between the cold air and the inner surface of the first airflow channel, improving the heat exchange coefficient, and increasing the heat conduction efficiency between the air and the housing. Consequently, the cold air passing through the first airflow channel can be preheated before entering the heating chamber and contacting the heating element, reducing the energy consumption of the heating element and conserving battery power. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0019] Figure 1 is a schematic diagram of a vertical cross-sectional structure of an aerosol generating device in some embodiments of the present invention;

[0020] Figure 2 yes Figure 1 A schematic diagram of a partial structure of an aerosol generating device is shown;

[0021] Figure 3 yes Figure 2 A schematic vertical cross-sectional view of a partial structure of an aerosol generating device is shown;

[0022] Figure 4 yes Figure 2 A schematic diagram of a vertical cross-sectional structure of a partial structure of an aerosol generating device when no aerosol generating substrate is assembled;

[0023] Figure 5 yes Figure 2 A schematic diagram of the exploded structure of a partial structure of the aerosol generating device shown;

[0024] Figure 6 yes Figure 5 A schematic vertical cross-sectional view of a partial structure of an aerosol generating device is shown;

[0025] Figure 7 is a schematic diagram of the three-dimensional structure of the second cylinder of the aerosol generating device in some embodiments of the present invention;

[0026] Figure 8 yes Figure 7 A schematic diagram of the enlarged structure of part A;

[0027] Figure 9 yes Figure 4 A schematic diagram of the exploded structure of the aerosol generating device shown;

[0028] Figure 10 1 is a schematic diagram of a vertical cross-sectional structure of an aerosol generating device in other embodiments of the present invention;

[0029] Figure 11 is a schematic diagram of the three-dimensional structure of the heating element of the aerosol generating device in some embodiments of the present invention;

[0030] Figure 12 It is a schematic diagram of the partial structure of the heating element of the aerosol generating device in other embodiments of the present invention. DETAILED DESCRIPTION

[0031] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings.

[0032] like Figures 1 to 8 As shown, the aerosol-generating device in some embodiments of the present invention includes a housing 50, a battery 51 disposed within the housing 50, a housing 1, and a heating element 2. The housing 50 can be held by the user. The heating element 2 is disposed within the housing 1. However, in other embodiments, the housing 1 may not be provided, and the heating element 2 may be disposed directly within the housing 50.

[0033] The interior of the heating element 2 forms a heating chamber 30, which is used to accommodate and heat the aerosol-generating substrate 40. The heating element 2 is generally hollow and cylindrical. When the aerosol-generating substrate 40 is housed within the heating chamber 30, the heating element 2 surrounds the aerosol-generating substrate 40. When powered, the heating element 2 generates heat, which is then transferred along its circumference to the aerosol-generating substrate 40. The heated aerosol-generating substrate 40 produces an aerosol for inhalation by the user.

[0034] like Figure 3 and Figure 6 As shown, in some embodiments, the aerosol-generating substrate 40, the functional component 41, the filter element 42, etc. are axially connected and then wrapped in a wrapping paper to form an aerosol-generating product 4. The aerosol-generating substrate 40 of the aerosol-generating product 4 as a whole can be inserted into the heating chamber 30 so that the aerosol-generating substrate 40 is exactly located within the heating chamber 30 and surrounded by the heating element 2.

[0035] Specifically, if Figure 11As shown, in some embodiments, the heating element 2 includes a heating base 21, an infrared radiation layer 22 and a first heating film 20 provided on the outer circumference or inner circumference of the heating base 21. Specifically, the heating base 21 can be a ceramic base 24 or a quartz base. When the first heating film 20 is energized, it generates heat and transfers the heat to the infrared radiation layer 22 on the surface. When heated, the infrared radiation layer 22 generates infrared rays, thereby heating the aerosol generating matrix inserted into the heating element 2. The heating element 2 also includes a conductive film provided on the surface of the infrared radiation layer 22, and an electrode lead 23 connected to the first heating film 20. The electrode lead 23 is connected to a power source. The heating principle is as follows: when the first heating film 20 is energized through the electrode lead 23, the first heating film 20 generates heat under the action of the current, and the heat is transferred to the infrared radiation layer 22. The infrared radiation layer 22 generates infrared radiation. The infrared radiation passes through the heating base 21 and is absorbed by the aerosol generating matrix, thereby heating the aerosol generating matrix. In addition, the first heating film 20 also conducts heat to the heating base 21, which then transfers the heat to the aerosol generating matrix through the heating base 21. The battery 51 is located on one side of the housing 1 and is connected to the electrode lead 23 of the heating element 2 to supply power to the heating element 2.

[0036] like Figure 12 As shown, in other embodiments, the heating element 2 includes a ceramic substrate 24, a protective layer 25 and a heating layer 26. The ceramic substrate 24 is tubular and can allow infrared light to pass through. The inner side of the ceramic substrate 24 defines a heating chamber 30 for accommodating the aerosol generating matrix. The heating layer 26 is arranged on the tube wall of the ceramic substrate 24 and is used to radiate infrared light waves. The infrared light waves can pass through the ceramic substrate 24 to heat the aerosol generating matrix. The protective layer 25 is coated on the ceramic substrate 24, and the thickness of the protective layer 25 is less than the thickness of the tube wall of the ceramic substrate 24. The thermal conductivity of the protective layer 25 is lower than the thermal conductivity of the ceramic substrate 24, which can enhance the strength of the ceramic substrate 24 (especially the strength of the ceramic substrate 24 with a smaller thickness), ensure that the ceramic substrate 24 has sufficient strength to prevent falling and cracking, and further reduce the heat capacity of the ceramic substrate 24, so as to achieve the purpose of rapid heating and improve energy efficiency. Furthermore, the provision of the protective layer 25 allows for a thinner ceramic substrate 24, thereby increasing the transmittance of infrared light waves through the ceramic substrate 24, further improving energy efficiency. This also facilitates temperature control of the ceramic substrate 24 wall, keeping the temperature within 48 degrees Celsius. This also facilitates miniaturization of the heating element 2, and thus the overall aerosol generating device. The heating layer 26 is at least partially located between the protective layer 25 and the ceramic substrate 24.

[0037] Furthermore, if Figure 12As shown, in some embodiments, the heating layer 26 is a membrane structure, and the heating layer 26 includes an infrared film 261 and a second heating film 262. The infrared film 261 is provided on the outer side of the ceramic substrate 24; specifically, the infrared film 261 can be coated, covered or printed on the outer side of the ceramic substrate 24. The infrared film 261 uniformly covers the entire outer side of the ceramic substrate 24. In this embodiment, the second heating film 262 can be provided on the infrared film 261, and can be formed on the infrared film 261 by coating or printing. The second heating film 262 can be provided in a longitudinal direction and can extend along the circumference of the ceramic substrate 24. The protective layer 25 covers the outer periphery of the second heating film 262 and the infrared film 261.

[0038] Alternatively, in some other embodiments, the infrared film 261 may be disposed on the inner side of the ceramic base 24 , the second heating film 262 may be disposed on the outer side of the ceramic base 24 , and the protective layer 25 may cover the outer periphery of the second heating film 262 .

[0039] Alternatively, in some other embodiments, the infrared film 261 and the second heating film 262 are not limited to being independent film structures. The heating layer 26 may also be an infrared heating film that actively generates heat and radiates infrared light when powered. The infrared heating film may be disposed on the outer side and the inner side of the ceramic base 24.

[0040] like Figures 3 to 8 As shown, a first air flow channel 10 is provided inside the housing 50, the air inlet end of the first air flow channel 10 is connected to the outside of the housing 50, and the air outlet end of the first air flow channel 10 is connected to the heating chamber 30. That is, the outside air is connected to the first air flow channel 10, and the first air flow channel 10 is connected to the heating chamber 30, and the outside air enters the heating chamber 30 through the first air flow channel 10 and contacts the heating element 2. The inner wall of the first air flow channel 10 is provided with a plurality of convex teeth 6. The first air flow channel 10 has an extension direction. The extension path of the first air flow channel 10 along its extension direction is at least partially curved, so as to increase the total length of the first air flow channel 10 as much as possible. That is, the extension path of the first air flow channel 10 along its length direction can be entirely curved or partially curved. Specifically, the first air flow channel 10 can have a length direction and a width direction, with the length direction being its extension direction, that is, the first air flow channel 10 can be an extension path along its length direction that is at least partially curved.

[0041] like Figure 7 and Figure 8As shown, a plurality of protruding teeth 6 are arranged at intervals along the extension direction of the first airflow channel 10, and at least two protruding teeth 6 among the plurality of protruding teeth 6 are located on opposite sides of the first airflow channel 10 and are staggered. That is, at least two protruding teeth 6 are located on opposite sides of the first airflow channel 10 and are not in contact with each other. A plurality of protruding teeth 6 means that the number of protruding teeth 6 is two or more. The dimension of each protruding tooth 6 along the width direction of the first airflow channel 10 is smaller than the width of the first airflow channel 10. Thus, as shown in FIG. Figure 8 As shown by the dotted line joint, each two protruding teeth 6 together define a curved airflow path, which has at least two turning points, thereby effectively extending the total length of the airflow path. Figure 7 and Figure 8 In the embodiment shown, each protruding tooth 6 is roughly in the shape of a rectangular block. In other embodiments, the number and shape of the protruding teeth 6 can be freely adjusted, and the present invention does not impose any restrictions on this.

[0042] In summary, since the extension path of the first airflow channel 10 along its extension direction is at least partially curved, and the convex teeth 6 are provided within the first airflow channel 10, the airflow path length and the surface area of ​​the inner surface of the first airflow channel 10 can be increased, thereby increasing the heat transfer area between the cold air and the inner surface of the first airflow channel 10, improving the heat exchange coefficient, and increasing the heat conduction efficiency between the air and the housing 1. Thus, on the one hand, the cold air passing through the first airflow channel 10 can be preheated before entering the heating chamber 30 and contacting the heating element 2, reducing the energy consumption of the heating element 2 and saving the battery 51. On the other hand, the air within the first airflow channel 10 can continuously remove a portion of the heat from the housing 50, thereby preventing the housing 50 from becoming too hot and preventing the user from burning their hands when holding the aerosol generating device.

[0043] like Figure 7 and Figure 8 As shown in FIG. 1 , in some embodiments, at least one portion of a protruding tooth 6 extends into the gap between two adjacent protruding teeth 6 on the opposite side along the extending direction of the first air flow channel 10. Specifically, Figure 7 and Figure 8For example, three of the protruding teeth 6 are defined as the first protruding tooth 61, the second protruding tooth 62 and the third protruding tooth 63. The first protruding tooth 61 is located on the right side of the air flow channel, and the second protruding tooth 62 and the third protruding tooth 63 are located on the left side of the air flow channel. The second protruding tooth 62 and the third protruding tooth 63 are spaced apart along the extension direction of the first air flow channel 10. That is, the first protruding tooth 61 and the second protruding tooth 62 are located on opposite sides of the first air flow channel 10 and are staggered; the first protruding tooth 61 and the third protruding tooth 63 are also located on opposite sides of the first air flow channel 10 and are staggered. A portion of the first protruding tooth 61 extends into the gap between the adjacent second protruding teeth 62 and the third protruding teeth 63 along the extension direction of the first air flow channel 10. In some other embodiments, portions of multiple (more than one) protruding teeth 6 may extend into the gap between two other adjacent protruding teeth 6 along the extension direction of the first air flow channel 10. For example Figure 7 In the embodiment shown, there are a plurality of combinations of the first protruding teeth 61, the second protruding teeth 62 and the third protruding teeth 63. Figure 8 As shown by the dotted line joint, every three protruding teeth 6 together define a curved airflow path. The airflow path has at least four turning points, thereby effectively extending the total length of the airflow path.

[0044] like Figure 7 As shown, in some embodiments, the spacing between adjacent protruding teeth 6 along the extension direction of the first airflow channel 10 is unequal. Alternatively, in other embodiments, the spacing between adjacent protruding teeth 6 along the extension direction of the first airflow channel 10 can also be equal. The sizes of the protruding teeth 6 can be equal or unequal, or partially equal and partially unequal. The shapes and structures of the protruding teeth 6 can be the same or different, or partially the same and partially different.

[0045] Furthermore, if Figure 7 In the illustrated embodiment, the spacing between the protruding teeth 6 along the extension direction of the first airflow channel 10 is distributed as dense in the middle and sparse on both sides. Alternatively, in other embodiments, the spacing between the protruding teeth 6 along the extension direction of the first airflow channel 10 can also be distributed as sparse in the middle and dense on both sides, or as alternating sparse and dense. Different spacing densities and spacing sizes can produce different airflow path shapes. The spacing density and spacing size can be freely adjusted according to actual needs, and the present invention does not impose any restrictions on this.

[0046] like Figures 4 to 6As shown, in some embodiments, the shell 1 includes a first barrel 11 and a second barrel 12, and the first barrel 11 is sleeved on the periphery of the second barrel 12 and connected to the second barrel 12. The first barrel 11 and the second barrel 12 can be directly connected or indirectly connected, and the connection between the two can be detachable or non-detachable. In order to enable the first barrel 11 to be sleeved on the periphery of the second barrel 12, the cross-sectional dimension of the first barrel 11 can be larger than the cross-sectional dimension of the second barrel 12. The shell 1 has a longitudinal axis y, the direction of the longitudinal axis y is consistent with the direction in which the aerosol generating matrix 40 is inserted into the heating chamber 30, and the cross-sectional dimension refers to a transverse direction perpendicular to the longitudinal axis y.

[0047] Furthermore, if Figures 4 to 6 In the illustrated embodiment, a first air flow channel 10 is defined between the outer wall surface of the second cylinder 12 and the inner wall surface of the first cylinder 11. A first air vent 13 is provided on the first cylinder 11 to connect the inner and outer sides of the first cylinder 11. The first air vent 13 is connected to the air inlet end of the first air flow channel 10. Thus, the air inlet end of the first air flow channel 10 is connected to the air outside the shell 1 via the first air vent 13. The air outside the shell 1 can enter the first air flow channel 10 through the first air vent 13. In the heating chamber 30, the aerosol generated by the heating element 2 heating the aerosol generating matrix 40 is mixed with the air entering the heating chamber 30 and flows out through the upper end opening of the first cylinder 11.

[0048] like Figures 4 to 8 As shown, in some embodiments, the outer wall of the second barrel 12 is provided with a groove, and the groove and the inner wall of the first barrel 11 define the first airflow channel 10, and the tooth-shaped structure is disposed within the groove. Thus, the tooth-shaped structure can be fixed to the outer wall of the second barrel 12 without affecting the assembly and disassembly of the second barrel 12 and the first barrel 11. In other embodiments, the second barrel 12 may not be provided with a groove, and the tooth-shaped structure may be disposed directly between the outer wall of the second barrel 12 and the inner wall of the first barrel 11.

[0049] like Figures 5 to 7As shown, in some embodiments, the second barrel 12 is provided with a first snap-fit ​​portion 123, and the first barrel 11 is provided with a second snap-fit ​​portion 112. The first snap-fit ​​portion 123 is a boss formed by protruding outward relative to the second barrel 12, and the second snap-fit ​​portion 112 is a through hole formed by being recessed inward relative to the first barrel 11. The first snap-fit ​​portion 123 is adapted to the second snap-fit ​​portion 112 so that the second barrel 12 and the first barrel 11 can be detachably connected together. However, in some other embodiments, the first snap-fit ​​portion 123 can also be a through hole, and the second snap-fit ​​portion 112 can be a corresponding boss. That is, one of the first snap-fit ​​portion 123 and the second snap-fit ​​portion 112 is a boss and the other is a through hole, and it is sufficient for the first snap-fit ​​portion 123 and the second snap-fit ​​portion 112 to be snap-fitted and connected together.

[0050] Regarding how the air outlet end of the first air flow channel 10 is connected to the heating chamber 30, two different embodiments are provided below as examples for explanation. However, in some other embodiments not shown in the figures, the specific communication path between the air outlet end of the air flow channel and the heating chamber 30 may also be in other forms, and the present invention does not impose any restrictions on this.

[0051] Please also read Figure 4 and Figure 7 Regarding the first embodiment of the connection between the outlet of the first airflow channel 10 and the heating chamber 30, a second vent 124 is provided on the second cylindrical body 12. The second vent 124 connects the outlet of the first airflow channel 10 and the heating chamber 30. Specifically, the second vent 124 is positioned at the outlet of the first airflow channel 10 and extends through both the inside and outside of the second cylindrical body 12. Thus, the airflow path from outside the housing 1 into the heating chamber 30 is the following: first vent 13 - first airflow channel 10 - second vent 124 - heating chamber 30.

[0052] See also Figure 9 In a second embodiment of the communication method between the air outlet of the first air flow channel 10 and the heating chamber 30, the second cylindrical body 12 includes a connected side wall 120 and an end wall 121, and the first cylindrical body 11 is sleeved around the outer periphery of the side wall 120. The end wall 121 is provided with a third air vent 125 and a fourth air vent 126. The third air vent 125 connects the air outlet of the first air flow channel 10 with the exterior of the second cylindrical body 12, and the fourth air vent 126 connects the exterior of the second cylindrical body 12 with the heating chamber 30. The fourth air vent 126 is not connected to the first air flow channel 10. Figure 9The dashed arrows in the middle illustrate the airflow path. Thus, the airflow path from the outside of the housing 1 to the heating chamber 30 is the first vent 13 - first airflow channel 10 - third vent 125 - fourth vent 126 - heating chamber 30. Furthermore, in this embodiment, in order to prevent the air preheated through the first airflow channel 10 from dissipating heat outside the second cylinder 12 when passing through the outside of the second cylinder 12, a pipe can be provided between the third vent 125 and the fourth vent 126 to connect and seal the two, thereby establishing a closed heat-insulating channel between the third vent 125 and the fourth vent 126. Thus, the air flowing out of the outlet end of the first airflow channel 10 passes through the third vent 125, the heat-insulating channel, and the fourth vent 126 in sequence before entering the heating chamber 30.

[0053] like Figure 10 As shown, in some embodiments, the second cylinder 12 is further provided with a second air flow channel 127, which is arranged at the bottom of the second cylinder 12 and passes through the end wall 121. The second air flow channel 127 connects the outside of the second cylinder 12 with the heating chamber 30. Specifically, the bottom of the end wall 121 extends outward to form a protrusion 1210, which is a hollow structure, one end of which is connected to the outside of the end wall 121 and the other end is connected to the heating chamber 30. The interior of the protrusion 1210 forms the second air flow channel 127. That is, in addition to entering the heating chamber 30 after being preheated through the first vent 13 and the first air flow channel 10, the air outside the shell 1 can also enter the heating chamber 30 through the second air flow channel 127. Among them, the air passing through the first vent 13 is preheated air, which is used to reduce heat loss of the heating element 2 and reduce energy consumption. However, the air flow path of the first air flow channel 10 is longer. The air passing through the second air flow channel 127 can directly enter the heating chamber 30, and the air flow path is shorter. The simultaneous provision of the first air flow channel 10 and the second air flow channel 127 can help ensure sufficient air intake while reducing energy consumption.

[0054] like Figures 4 to 6 , Figure 9 and Figure 10 As shown, in some embodiments, the aerosol generating device further includes a heat insulating ring 7 disposed within the heating chamber 30, the heat insulating ring 7 being in contact with the housing 1 and the heating element 2, respectively. The heat insulating ring 7 is located between the housing 1 and the heating element 2 to prevent direct contact between the heating element 2 and the housing 1, thereby reducing the heat directly transferred from the heating element 2 to the housing 1 and the outer shell 50.

[0055] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. An aerosol generating device, characterized in that It comprises a housing (50) and a heating element (2), wherein the heating element (2) is arranged inside the housing (50), and a heating cavity (30) is formed inside the heating element (2); A first air flow channel (10) is provided inside the housing (50), an air inlet end of the first air flow channel (10) is communicated with the outside of the housing (50), and an air outlet end of the first air flow channel (10) is communicated with the heating chamber (30); The first airflow channel (10) has an extension direction, and an extension path of the first airflow channel (10) along the extension direction is at least partially curved. The inner wall of the first airflow channel (10) is provided with a plurality of protruding teeth (6).

2. The aerosol generating device according to claim 1, wherein The plurality of protruding teeth (6) are arranged at intervals along the extension direction of the first airflow channel (10), and / or at least two of the plurality of protruding teeth (6) are located on opposite sides of the first airflow channel (10) and are staggered.

3. The aerosol generating device according to claim 2, characterized in that At least one portion of the protruding teeth (6) extends into the gap between the other two adjacent protruding teeth (6) on the opposite side.

4. The aerosol generating device according to claim 2, wherein: Along the extension direction of the first airflow channel (10), the intervals between adjacent protruding teeth (6) are equal or unequal.

5. The aerosol generating device according to claim 2, wherein: Along the extension direction of the first airflow channel (10), the spacing between the protruding teeth (6) is distributed in the form of dense in the middle and sparse on both sides, sparse in the middle and dense on both sides, or sparse and dense alternatingly.

6. The aerosol generating device according to claim 1, wherein: The aerosol generating device further comprises a shell (1), wherein the shell (1) is arranged inside the outer shell (50), and the heating element (2) is arranged inside the shell (1); The housing (1) comprises a first cylinder (11) and a second cylinder (12), wherein the first cylinder (11) is sleeved on the periphery of the second cylinder (12) and connected to the second cylinder (12); The first air flow channel (10) is defined between the outer wall surface of the second cylinder (12) and the inner wall surface of the first cylinder (11). The first cylinder (11) is provided with a first vent hole (13) communicating with the inner and outer sides of the first cylinder (11). The first vent hole (13) is connected to the air inlet end of the first air flow channel (10).

7. The aerosol generating device according to claim 6, characterized in that The outer wall surface of the second cylinder (12) is provided with a groove, and the first air flow channel (10) is defined between the groove and the inner wall surface of the first cylinder (11), and the protruding teeth (6) are arranged in the groove.

8. The aerosol generating device according to claim 6, characterized in that A second vent hole (124) is provided on the second cylinder (12), and the air outlet end of the first air flow channel (10) and the heating chamber (30) are connected via the second vent hole (124).

9. The aerosol generating device according to claim 1, wherein: The heating element (2) comprises a ceramic base (24), a protective layer (25) and a heating layer (26); The ceramic substrate (24) is tubular and can transmit infrared light, and the inner side of the ceramic substrate (24) defines a heating cavity (30) for accommodating an aerosol generating matrix; The heating layer (26) is arranged on the tube wall of the ceramic substrate (24), and the protective layer (25) is coated on the heating layer (26). The heating layer (26) can heat the aerosol generating matrix by radiating infrared light waves. The thickness of the protective layer (25) is less than the thickness of the tube wall of the ceramic substrate (24), and the thermal conductivity of the protective layer (25) is lower than the thermal conductivity of the ceramic substrate (24).

10. The aerosol generating device according to claim 9, characterized in that The heating layer (26) includes an infrared film (261) and a second heating film (262); the infrared film (261) is arranged on the outer side of the ceramic substrate (24); the second heating film (262) is arranged on the infrared film (261), and the protective layer (25) is coated on the outer periphery of the second heating film (262) and the infrared film (261); Alternatively, the infrared film (261) is arranged on the inner side of the ceramic base (24), the second heating film (262) is arranged on the outer side of the ceramic base (24), and the protective layer (25) is coated on the outer periphery of the second heating film (262); Alternatively, the heating layer (26) includes an infrared heating film that actively generates heat and radiates infrared light when powered on, and the infrared heating film is arranged on the outer side or the inner side of the ceramic substrate (24).

Images