Heating assembly and aerosol generating device

Abstract

The utility model discloses a heating assembly and an aerosol generating device, the heating assembly comprises a containing pipe, a heating body, a rotating end cover and a fixing device, and the containing pipe is used for containing an aerosol generating substrate; the heating body is sleeved outside the accommodating pipe; the rotating end cover is sleeved on the accommodating pipe, and the end part of the heating body is arranged on the rotating end cover in a penetrating manner; the fixing device comprises a mounting cylinder and a fixed end cover, the mounting cylinder covers the accommodating pipe, the fixed end cover covers the end part of the mounting cylinder, the fixed end cover and the rotating end cover are mutually nested, and the rotating end cover is configured to rotate relative to the accommodating pipe and the fixed end cover; the fixed end cover is provided with first limiting parts arranged in the circumferential direction, the rotating end cover is provided with second limiting parts, and the second limiting parts are matched with the first limiting parts in the rotating process of the rotating end cover so as to limit the rotating angle of the rotating end cover.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of atomization, and more particularly to a heating assembly and an aerosol generating device. BACKGROUND

[0002] The aerosol generating device provides a heat source by energizing a heating element, heats an aerosol generating substrate contained in a quartz tube, and forms an aerosol. In the related art, the heating element is usually sleeved outside the quartz tube. In order to facilitate assembly, the diameter of the heating element needs to be slightly larger than the diameter of the quartz tube, which results in a gap between the heating element and the quartz tube when the heating element is sleeved on the quartz tube, and further results in a decrease in heat transfer from the heating element to the quartz tube, affecting the heating speed and effect. SUMMARY

[0003] In view of the above problems, the present application provides a heating assembly and an aerosol generating device.

[0004] The heating assembly of the present application includes a containing tube, a heating element, a rotating end cover, and a fixing device. The containing tube is used to contain an aerosol generating substrate. The heating element is sleeved outside the containing tube. The rotating end cover is sleeved on the containing tube, and the end portion of the heating element is arranged in the rotating end cover. The fixing device includes a mounting cylinder and a fixing end cover. The mounting cylinder is arranged outside the containing tube, and the fixing end cover is arranged at the end portion of the mounting cylinder. The fixing end cover and the rotating end cover are nested with each other. The rotating end cover is configured to rotate relative to the containing tube and the fixing end cover. The fixing end cover is provided with a first limiting portion arranged in the circumferential direction. The rotating end cover is provided with a second limiting portion. The second limiting portion cooperates with the first limiting portion during the rotation of the rotating end cover to limit the rotation angle of the rotating end cover.

[0005] In the heating assembly of the present application, the rotating end cover is sleeved on the containing tube, the end portion of the heating element is arranged in the rotating end cover, the mounting cylinder is arranged outside the containing tube, the fixing end cover and the rotating end cover are nested with each other, the rotating end cover can rotate relative to the containing tube and the fixing end cover, and the first limiting portion on the fixing end cover cooperates with the second limiting portion on the rotating end cover to limit the rotation angle of the rotating end cover. During the rotation of the rotating end cover, the rotating end cover drives the heating element to move along the circumferential direction of the containing tube. The rotation angle can be adjusted according to the difference between the radial dimensions of the heating element and the containing tube, so that the heating element is tightly attached to the wall surface of the containing tube. The efficiency of heat transfer from the heating element to the inside of the containing tube is improved, and the heating speed is further improved, and the heating effect is optimized.

[0006] In some embodiments, the heating element includes a main body portion and an electrical connection end portion. The main body portion is substantially cylindrical and is sleeved on the containing tube. The electrical connection end portion is connected to the end portion of the main body portion and is used to connect to an external circuit. The rotating end cover is provided with a wire outlet slot. The electrical connection end portion is arranged in the wire outlet slot. When the rotating end cover rotates relative to the containing tube, the electrical connection end portion is driven to move, so that the main body portion is tightened and attached to the containing tube.

[0007] In some embodiments, the main body portion is arranged outside the accommodation tube and extends spirally along the axial direction of the accommodation tube.

[0008] In some embodiments, the outlet slot is formed in the inner circumferential surface of the rotating end cap abutting against the accommodation tube.

[0009] In some embodiments, the rotating end cap is sleeved on both axial ends of the accommodation tube to limit the position of the heat generating body in the axial direction of the accommodation tube.

[0010] In some embodiments, one of the first limiting portion and the second limiting portion is a protrusion, and the other is a groove matched with the protrusion.

[0011] In some embodiments, the fixed end cap is sleeved outside the rotating end cap, the first limiting portion is formed on the inner wall surface of the fixed end cap, and the second limiting portion is formed on the outer circumferential surface of the rotating end cap.

[0012] In some embodiments, the number of the first limiting portions is multiple, the first limiting portions are all formed as grooves, and the multiple grooves are uniformly arranged along the circumferential direction of the accommodation tube; the number of the second limiting portions is at least one, the second limiting portion is formed as a protrusion, and the protrusion is sequentially engaged with adjacent grooves during the rotation of the rotating end cap to limit the index value of the rotation angle of the rotating end cap as the included angle between adjacent grooves and the rotation center of the rotating end cap.

[0013] In some embodiments, one of the outer circumferential surface of the rotating end cap and the inner wall surface of the fixed end cap is formed with a clamping groove, and the other is provided with a clamping block in sliding cooperation with the clamping groove, and the clamping groove extends along the circumferential direction of the accommodation tube.

[0014] The aerosol generating device of the embodiments of the present application comprises the heat generating assembly of any one of the above embodiments.

[0015] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which:

[0017] Figure 1 is a structural schematic diagram of a heat generating assembly of an embodiment of the present application;

[0018] Figure 2 is a structural schematic diagram of a heat generating assembly of an embodiment of the present application in a front view;

[0019] Figure 3 is a structural schematic diagram of a heat generating assembly of an embodiment of the present application in a top view;

[0020] Figure 4 is a structural schematic view of the positioning support of the first embodiment of the present application;

[0021] Figure 5 is a structural schematic view of the positioning support of the first embodiment of the present application in a front view.

[0022] Main element symbol explanation:

[0023] 10-heating assembly; 11-housing tube; 101-accommodation space; 12-heating body; 121-main body part; 123-electricity connection end part; 20-rotating end cover; 21-second limiting part; 211-protrusion; 22-end surface; 23-connection plate; 24-wiring groove; 25-buckle; 26-gap; 27-engaging groove; 28-protruding rib; 30-fixing device; 31-mounting cylinder; 32-fixing end cover; 321-first limiting part; 322-groove; 323-first surrounding part; 324-second surrounding part; 325-buckling block. DETAILED DESCRIPTION

[0024] The embodiments of the present application will be described in detail below with reference to the drawings, in which the same or similar components have the same or similar reference numbers throughout the drawings and a repeated explanation will be omitted. The embodiments described below by reference to the drawings are exemplary and are for the purpose of explanation of the present application and should not be understood as a limitation of the present application.

[0025] In the description of the present application, it should be understood that the terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be understood as a limitation of the present application. In addition, the terms “first”, “second” are only for the purpose of description, and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as “first”, “second” can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of “a plurality of” is two or more, unless otherwise explicitly and specifically limited.

[0026] In the description of the application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0027] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0028] The following disclosure provides many different embodiments or examples for implementing different structures of the application. In order to simplify the disclosure of the application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the application. In addition, the present application can repeatedly refer to the same reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not in itself indicate a relationship between the various embodiments and / or settings being discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0029] The aerosol-generating device is a structure capable of generating aerosol by generating heat through electromagnetic action and acting on an aerosol-generating substrate (not shown in the figure). The aerosol-generating substrate is a substance that can generate aerosol after being processed and heated. The aerosol-generating substrate is atomized by heat to form an aerosol, which can be visible or invisible and can include vapor (e.g., fine particulate matter in a gaseous state, which is usually liquid or solid at room temperature) and liquid droplets of gas and condensed vapor. The aerosol can contain volatile compounds. The user can inhale the aerosol into the oral cavity, nasal cavity or lungs through the mouth or nose, and the aerosol inhaled into the user's respiratory system can be used for eating, medicine, health care, entertainment and other purposes.

[0030] The aerosol generating substrate can be in a full solid or semi-solid state, or in a liquid state. For example, the solid aerosol generating substrate can be a plant flower, stem or leaf product prepared by a rolling, thick paste, die casting or extrusion process. For another example, the liquid aerosol generating substrate can include a liquid composition based on a plant extract and / or various flavoring agents.

[0031] Referring to Figures 1-4 The heating assembly 10 of the embodiment includes a containing tube 11, a heating body 12, a rotating end cover 20 and a fixing device 30. The containing tube 11 is used to contain the aerosol generating substrate. The heating body 12 is sleeved outside the containing tube 11. The rotating end cover 20 is sleeved on the containing tube 11, and the end of the heating body 12 is arranged in the rotating end cover 20. The fixing device 30 includes a mounting cylinder 31 and a fixing end cover 32. The mounting cylinder 31 is sleeved outside the containing tube 11, and the fixing end cover 32 is arranged at the end of the mounting cylinder 31. The fixing end cover 32 and the rotating end cover are nested with each other. The rotating end cover 20 is configured to rotate relative to the containing tube 11 and the fixing end cover 32. The fixing end cover 32 is provided with a first limiting portion 321 arranged in a circumferential direction. The rotating end cover 20 is provided with a second limiting portion 21. The second limiting portion 21 cooperates with the first limiting portion 321 during rotation of the rotating end cover 20 to limit the rotation angle of the rotating end cover 20.

[0032] In the heating assembly 10 of the embodiment, the rotating end cover 20 is sleeved on the containing tube 11, the end of the heating body 12 is arranged in the rotating end cover 20, the mounting cylinder 31 is sleeved outside the containing tube 11, the fixing end cover 32 and the rotating end cover 20 are nested with each other, the rotating end cover 20 can rotate relative to the containing tube 11 and the fixing end cover 32, and the first limiting portion 321 on the fixing end cover 32 cooperates with the second limiting portion 21 on the rotating end cover 20 to limit the rotation angle of the rotating end cover 20. During rotation of the rotating end cover 20, the rotating end cover 20 drives the heating body 12 to move along the circumferential direction of the containing tube 11, and the rotation angle can be adjusted according to the difference between the radial dimensions of the heating body 12 and the containing tube 11, so that the heating body 12 is tightly attached to the wall surface of the containing tube 11, the efficiency of heat transfer from the heating body 12 to the inside of the containing tube 11 is improved, the heating speed is improved, and the heating effect is optimized.

[0033] Specifically, the heating body 12 can convert electrical energy into heat energy when connected to electricity. The heat generated by the heating body 12 is transferred to the aerosol generating substrate through the contact surfaces of the heating body 12 and the containing tube 11, the containing tube 11 and the aerosol generating substrate in sequence, or is irradiated to the aerosol generating substrate in the form of infrared radiation through the containing tube 11. The aerosol generating substrate is atomized to generate an aerosol after absorbing heat and rising to a certain temperature.

[0034] The heating element 12 is in a cylindrical shape as a whole. To improve the fitting degree of the heating element 12 and the accommodating tube 11, the cross-sectional shape of the heating element 12 matches the cross-sectional shape of the accommodating tube 11. The heating element 12 is sleeved outside the accommodating tube 11 and is in a substantially cylindrical shape as a whole. The heating element 12 can be in various structures such as a wire, a strip, a mesh, a sheet, a plate, a rod, or a film layer, which are not limited in the present application. The heating element 12 is in a cylindrical shape as a whole and is sleeved outside the accommodating tube 11, which is conducive to fully covering the accommodating tube 11 by the heating element 12, improving the effective area of heating, and better heating uniformity.

[0035] For example, the heating element 12 is a heating mesh and surrounds the accommodating tube 11 for one turn to form a cylindrical structure by winding. For another example, the heating element 12 can be a plurality of heating rods arranged along the circumference of the accommodating tube 11 to form a cylindrical structure. To improve the circumferential uniformity of heating by the heating element 12, the heating element 12 can be coaxial with the accommodating tube 11.

[0036] Alternatively, the heating element 12 is a wire material sleeved outside the accommodating tube 11 to form a cylindrical structure. The heating element 12 can be a round wire, a flat wire, or a wire body with other cross-sectional shapes. The heating element 12 is wound on the accommodating tube 11 and extends axially along the accommodating tube 11, which can form a spiral, a wave shape, or other shape of the extension path.

[0037] Alternatively, the heating element 12 is made of metal material, which has good electrical conductivity, is easy to be made into shape, and has better heat resistance.

[0038] Alternatively, the accommodating tube 11 is a hollow tube, and an internal hollow interval of the accommodating tube 11 forms an accommodation space 101. The wall surface of the accommodating tube 11 is a boundary surface for distinguishing the accommodation space 101 from the outside of the accommodating tube 11. The heating element 12 is arranged on the outside of the accommodating tube 11 away from the accommodation space 101. At least one end of the accommodating tube 11 forms an opening. The aerosol generating substrate can be a full solid and in a columnar shape, which is inserted into the accommodation space 101 through the opening.

[0039] Taking the axial direction of the accommodating tube 11 as the longitudinal direction, the cross-sectional shape of the accommodating tube 11 can be circular, elliptical, triangular, quadrilateral, polygonal, diamond, star-shaped, racetrack-shaped, olive-shaped, or other irregular shapes, which are not limited in the present application.

[0040] For example, the accommodating tube 11 is a hollow circular tube with openings at both axial ends. Taking the circular shape of the cross-section of the accommodating tube 11 as an example, the wall thickness of the accommodating tube 11 can be in the range of 0.1 mm to 0.5 mm, for example, the wall thickness of the accommodating tube 11 can be 0.1 mm, 0.12 mm, 0.25 mm, 0.3 mm, 0.36 mm, 0.4 mm, 0.44 mm, or 0.5 mm.

[0041] Optionally, the accommodation tube 11 is made of a heat-resistant and strong material, for example, quartz, glass, etc., so that the accommodation tube 11 can provide stable mounting support for the heating body 12, and the high-temperature reliability is good. For example, the accommodation tube 11 is made of quartz material, and the wall thickness of the accommodation tube 11 can be 0.3mm-0.4mm.

[0042] Optionally, in some embodiments, the accommodation tube 11 is a transparent quartz tube. In this way, the transmittance of infrared radiation can be increased, the efficiency of heat transfer from the heating body 12 to the aerosol generating substrate is improved, and rapid heating and atomization are facilitated.

[0043] It can be understood that the heat generated by the heating body 12 is dissipated in the form of infrared radiation to the surrounding, and the accommodation tube 11 is a transparent quartz tube, which increases the amount of infrared radiation that irradiates the aerosol generating substrate through the accommodation tube 11, thereby improving the heating speed and efficiency.

[0044] Optionally, the accommodation tube 11 can be a transparent or partially transparent quartz tube. If the accommodation tube 11 is a partially transparent quartz tube, at least the wall surface of the accommodation tube 11 opposite to the heating body 12 is transparent, for example, the heating body 12 is sleeved on the middle section of the accommodation tube 11, and the middle section of the accommodation tube 11 is a transparent quartz tube.

[0045] Optionally, the rotating end cover 20 is annular as a whole, and the rotating end cover 20 includes an end face 22 and a connecting plate 23. The end face 22 is in the form of an annular plate, the connecting plate 23 is in the form of a hollow flat column, and the inner diameter of the end face 22 is close to the outer diameter of the accommodation tube 11. The connecting plate 23 is connected to the inner periphery of the end face 22 and extends along the axial direction of the accommodation tube 11, and the connecting plate 23 abuts against the outer wall surface of the accommodation tube 11. An included angle is formed between the end face 22 and the connecting plate 23, for example, the included angle between the end face 22 and the connecting plate 23 is 90°, and the end face 22 is flat outward along the radial direction of the accommodation tube 11. Further, the second limiting portion 21 is formed on the connecting plate 23.

[0046] The fixing device 30 is fixedly arranged relative to the accommodation tube 11. Optionally, the fixing end cover 32 includes a first surrounding portion 323 and a second surrounding portion 324. The first surrounding portion 323 abuts against one side surface of the connecting plate 23 that is connected to the rotating end cover 20, and is opposite to the connecting plate 23 along the radial direction of the accommodation tube 11. The second surrounding portion 324 is connected to the first surrounding portion 323 along the axial direction of the accommodation tube 11, and partially opposes the connecting plate 23. The first surrounding portion 323 is formed on the second surrounding portion 324.

[0047] Optionally, the second surrounding portion 324 can partially extend to the outer side surface of the mounting cylinder 31 and abut against the outer side surface of the mounting cylinder 31. The second surrounding portion 324 surrounds the end portion of the mounting cylinder 31, and strengthens the connection strength between the fixing end cover 32 and the mounting cylinder 31.

[0048] Optionally, the matching surface between the first limiting part 321 and the second limiting part 21 is at least partially curved, and one of the first limiting part 321 and the second limiting part 21 is flexible.

[0049] Optionally, the mounting cylinder 31 is arranged outside the accommodating tube 11 and the heating body 12, the mounting cylinder 31 is spaced apart from the heating body 12 along the radial direction of the accommodating tube 11, and the inner wall surface of the mounting cylinder 31 is provided with a heat reflection layer to reflect the infrared radiation emitted by the heating body 12 outward to the accommodating tube 11. The heat reflection layer can be a metal film layer, for example, the heat reflection layer can be a gold plating film, a silver plating film, etc.

[0050] Further, the fixed end cover 32 and / or the rotating end cover 20 can also be provided with a heat reflection layer on the surface of the part that covers the interval between the end of the mounting cylinder 31 and the accommodating tube 11.

[0051] Optionally, the mounting cylinder 31 has a polygonal cross-sectional shape, and the inner wall surface of the mounting cylinder 31 includes a plurality of flat surfaces, thereby enhancing the reflection effect of infrared radiation. For example, the mounting cylinder 31 has a hexagonal cross-sectional shape.

[0052] Please refer to Figures 3-5 In some embodiments, the heating body 12 includes a main body part 121 and an electrical connection end part 123, the main body part 121 is substantially cylindrical and is sleeved on the accommodating tube 11, and the electrical connection end part 123 is connected to the end of the main body part 121 and is used to access an external circuit; the rotating end cover 20 is provided with a wire outlet slot 24, the electrical connection end part 123 is arranged in the wire outlet slot 24, and the rotating end cover 20 is configured to move the electrical connection end part 123 when the rotating end cover 20 rotates relative to the accommodating tube 11, so that the main body part 121 is tightened and closely fitted to the accommodating tube 11.

[0053] In this way, by arranging the wire outlet slot 24 in the rotating end cover 20 and arranging the electrical connection end part 123 in the wire outlet slot 24, the rotating end cover 20 drives the electrical connection end part 123 to move along the circumferential direction of the accommodating tube 11 during rotation, and pulls the main body part 121 to shrink in the circumferential direction and closely fit to the accommodating tube 11, thereby reducing or even eliminating the gap 26 between the heating body 12 and the accommodating tube 11, and improving the heat transfer efficiency.

[0054] Optionally, the electrical connection end part 123 extends away from the accommodating tube 11 in the direction away from the accommodating tube 11 and partially separates from the accommodating tube 11. The main body part 121 and the electrical connection end part 123 can be a split structure, or can be an integral heating body 12 that is functionally divided into local segments.

[0055] Optionally, the number of electrical connection end parts 123 is two, and the ends of the two electrical connection end parts 123 away from the main body part 121 can be respectively connected to two output ends of a power supply, or respectively connected to high and low potentials of an external circuit.

[0056] Optionally, the two electrical connection ends 123 are arranged in the wire outlet slot 24, and can first extend outward along the axial direction of the accommodating tube 11, and then extend along the outer circumferential surface of the fixed end cover 32.

[0057] Please refer to Figure 3 and Figure 5 In some embodiments, the main body part 121 is arranged outside the accommodating tube 11 and extends along the axial direction of the accommodating tube 11.

[0058] In this way, by arranging the main body part 121 outside the accommodating tube 11 and extending along the axial direction of the accommodating tube 11, the main body part 121 can be easily shrunk radially when the electrical connection ends 123 are moved by rotating the rotating end cover 20.

[0059] Optionally, the main body part 121 extends along the axial direction of the accommodating tube 11 from one end to the other end, forming a solenoid shape. The number of electrical connection ends 123 is two, and the two electrical connection ends 123 are respectively connected to the beginning and end of the main body part 121 extending at the two ends of the axial direction of the accommodating tube 11.

[0060] In this embodiment, the rotating end cover 20 is also provided with two, and the two rotating end covers 20 can be reversely rotated at the two ends of the axial direction of the accommodating tube 11, so that the two ends of the main body part 121 can be quickly tensioned, and then the radial size of the main body part 121 is reduced. Only one of the two rotating end covers 20 can be rotated to achieve the effect of tensioning the main body part 121.

[0061] Please refer to Figure 4 and Figure 5 In some embodiments, the wire outlet slot 24 is formed in the inner circumferential surface of the rotating end cover 20 abutting against the accommodating tube 11.

[0062] In this way, the wire outlet slot 24 is formed in the inner circumferential surface of the rotating end cover 20 abutting against the accommodating tube 11, so that the electrical connection ends 123 can abut against the accommodating tube 11 when passing through the wire outlet slot 24, which is beneficial to further reduce or even eliminate the gap 26 between the heat generating body 12 and the accommodating tube 11.

[0063] Specifically, the rotating end cover 20 is sleeved on the accommodating tube 11, and a part of the connecting plate 23 away from the end face 22 can abut against the outer wall surface of the accommodating tube 11, and the end face 22 and the part of the connecting plate 23 can extend beyond the end of the accommodating tube 11 along the axial direction of the accommodating tube 11. The wire outlet groove 24 is formed on the inner circumferential surface of the connecting plate 23 abutting against the accommodating tube 11, and can extend through the rotating end cover 20 (including the connecting plate 23 and the end face 22) along the axial direction and can continue to extend radially on the end face 22 from the inner diameter of the end face 22 to the outer diameter of the end face 22. The power connection end 123 of the heating element 12 extends into the wire outlet groove 24 from the end of the accommodating tube 11, and extends into the outside of the rotating end cover 20 along the extension path of the wire outlet groove 24.

[0064] Optionally, in some embodiments, the inner circumferential surface of the rotating end cover 20 is formed with a buckle 25 abutting against the outer wall surface of the accommodating tube 11, and the inner circumferential surface of the rotating end cover 20 and the outer wall surface of the accommodating tube 11 can form a gap 26 on the side of the buckle 25 away from the heating element 12. The heating assembly 10 further comprises a connecting member (not shown in the figure) filled in the gap 26. The gap 26 is in communication with the outside of the heating assembly 10. The connecting member (not shown in the figure) can be sealant, structural adhesive, etc. The connecting member (not shown in the figure) can be injected into the gap 26 in a flowing state and solidified in the gap 26, connecting the buckle 25, the inner circumferential surface of the rotating end cover 20 and the outer wall surface of the accommodating tube 11, and sealing the interval between the fixing device 30 and the accommodating tube 11, so as to avoid aerosol flowing into the interval between the fixing device 30 and the accommodating tube 11 to contaminate the heating element 12 to some extent.

[0065] Please refer to Figure 3 In some embodiments, the rotating end cover 20 is sleeved on both axial ends of the accommodating tube 11 to limit the position of the heating element 12 in the axial direction of the accommodating tube 11.

[0066] In this way, by sleeving the rotating end cover 20 on both circumferential ends of the accommodating tube 11 and arranging the end of the heating element 12 in the rotating end cover 20, the rotating end cover 20 plays a role of limiting the axial position of the heating element 12.

[0067] Specifically, the rotating end cover 20 is sleeved on both axial ends of the accommodating tube 11, the main body 121 of the heating element 12 is sleeved on the accommodating tube 11 in a spiral shape, and the two power connection ends 123 of the heating element 12 respectively pass through the wire outlet grooves 24 on the two rotating end covers 20. When the rotating end cover 20 rotates, it can rotate in a plane perpendicular to the axial direction of the accommodating tube 11, and the radial contraction of the heating element 12 is stable while the axial positioning of the heating element 12 is stable.

[0068] Please refer to Figure 4 and Figure 5 In some embodiments, one of the first limiting part 321 and the second limiting part 21 is a protrusion 211, and the other is a groove 322 matched with the protrusion 211.

[0069] Thus, by the cooperation of the protrusion 211 and the groove 322, the restriction effect of the first limiting portion 321 and the second limiting portion 21 on the rotation of the rotating end cover 20 is enhanced.

[0070] Specifically, taking the first limiting portion 321 as the groove 322 and the second limiting portion 21 as the protrusion 211 as an example, the protrusion 211 can protrude from the surface of the rotating end cover 20 along the radial direction of the containing tube 11, the groove 322 is formed by recessing the surface of the rotating end cover 20 along the radial direction of the containing tube 11, and the protrusion 211 at least partially extends into the groove 322. In the case where the fixed end cover 32 is sleeved outside the rotating end cover 20, the protrusion 211 protrudes from the outer peripheral surface of the rotating end cover 20, and the groove 322 is formed in the inner wall surface of the fixed end cover 32.

[0071] Alternatively, a plurality of grooves 322 can be arranged continuously along the circumferential direction of the containing tube 11, surrounding the rotating end cover 20 for one turn, and the slots of every two adjacent grooves 322 are interconnected. In the process of rotating the rotating end cover 20, the protrusion 211 moves from the groove 322 at the initial position to the adjacent groove 322 along the circumferential direction of the containing tube 11 and then moves to the next adjacent groove 322. The protrusion 211 or the rotating end cover 20 has a certain flexibility, so that the protrusion 211 can extend into and exit from different grooves 322 during rotation.

[0072] The shape of the protrusion 211 is not limited in the present application, for example, the shape of the protrusion 211 can be hemispherical, cubic, columnar or other irregular shapes. The shape of the groove 322 matches the shape of the protrusion 211.

[0073] In order to facilitate the protrusion 211 to engage with different grooves 322 along the circumferential direction of the containing tube 11 during the rotation of the rotating end cover 20 and reduce the rotation resistance, the outer contour of the protrusion 211 and the wall surface of the groove 322 are formed with mutually cooperating curved surfaces or are streamline-shaped. Figure 4 As shown in the drawings, the surface of the protrusion 211 is a circular arc surface, and the wall surface of the groove 322 is a circular arc surface with the same curvature or slightly larger curvature than the circular arc surface of the protrusion 211.

[0074] Please refer to Figure 4 and Figure 5 In some embodiments, the fixed end cover 32 is sleeved outside the rotating end cover 20, the first limiting portion 321 is formed in the inner wall surface of the fixed end cover 32, and the second limiting portion 21 is formed on the outer peripheral surface of the rotating end cover 20.

[0075] Thus, by sleeving the fixed end cover 32 outside the rotating end cover 20, the first limiting part 321 is formed on the inner wall surface of the fixed end cover 32, and the second limiting part 21 is formed on the outer circumferential surface of the rotating end cover 20, so that the first limiting part 321 and the second limiting part 21 cooperate between the fixed end cover 32 and the rotating end cover 20, effectively limiting the rotation angle of the rotating end cover 20 relative to the fixed end cover 32.

[0076] Specifically, the fixed end cover 32 can be fixedly connected with the mounting cylinder 31 by at least one of buckling, gluing, welding, riveting, screwing, etc., and the fixing device 30 is fixed as a whole relative to the containing tube 11. The end surface 22 of the rotating end cover 20 can protrude beyond the circumferential end surface 22 of the containing tube 11, and the rotating end cover 20 is wrapped outside the connecting plate 23 of the rotating end cover 20. The first limiting part 321 is formed on the inner wall surface opposite to the rotating end cover 20 of the fixed end cover 32, and the second limiting part 21 is formed on the outer circumferential surface of the connecting plate 23, i.e. the side surface away from the containing tube 11.

[0077] Please refer to Figure 4 and Figure 5 In some embodiments, the number of first limiting parts 321 is multiple, and each first limiting part 321 is formed as a groove 322. The multiple grooves 322 are uniformly arranged along the circumference of the containing tube 11. The number of second limiting parts 21 is at least one, and the second limiting part 21 is formed as a protrusion 211. The protrusion 211 sequentially engages with adjacent grooves 322 during the rotation of the rotating end cover 20, so as to limit the index value of the rotation angle of the rotating end cover 20 to be the included angle between the connecting line of the adjacent grooves 322 and the rotation center of the rotating end cover 20.

[0078] Thus, by uniformly arranging the multiple grooves 322 along the circumference of the containing tube 11, the protrusion 211 sequentially engages with adjacent grooves 322 during the rotation of the rotating end cover 20, and the movement of the protrusion 211 from one groove 322 to the next groove 322 limits the angle of rotation of the rotating end cover 20, so that the rotating end cover 20 can more accurately adjust the radial size of the heating body 12 by rotation.

[0079] Specifically, the index value of the rotation angle of the rotating end cover 20 is the minimum angle of each rotation of the rotating end cover 20, and the angle of each rotation of the rotating end cover 20 is an integer multiple of the index value.

[0080] It can be understood that the plurality of grooves 322 are uniformly arranged along the circumference of the containing tube 11, and the included angle between the geometric center of each two adjacent grooves 322 and the rotation center of the rotating end cover 20 is the same, and the included angle is a constant value. Each rotation of the rotating end cover 20, the protrusion 211 is moved from one groove 322 to an adjacent groove 322. The protrusion 211 is moved along the circumference from one groove 322 to the next groove 322, and the angle of rotation of the rotating end cover 20 is the same as the included angle between the two grooves 322 engaged before and after the movement of the protrusion 211 and the rotation center.

[0081] Optionally, the plurality of grooves 322 are densely arranged along the circumference of the containing tube 11, and the edges of each two adjacent grooves 322 are connected and the slots of the grooves 322 are connected to each other. During the rotation of the rotating end cover 20, the protrusion 211 can be moved along the circumference of the containing tube 11 and sequentially engaged with a plurality of grooves 322 on the movement track.

[0082] Please refer to Figure 5 In some embodiments, one of the outer circumferential surface of the rotating end cover 20 and the inner wall surface of the fixed end cover 32 is formed with a clamping groove 27, and the other is provided with a clamping block 325 which is in sliding fit with the clamping groove 27, and the clamping groove 27 extends along the circumference of the containing tube 11.

[0083] In this way, by extending the clamping groove 27 along the circumference of the containing tube 11, the clamping block 325 is in fit with the clamping groove 27, so that the fit surface of the rotating end cover 20 and the fixed end cover 32 extends along the circumference of the containing tube 11, thereby limiting the rotation of the rotating end cover 20 along the circumference of the containing tube 11, and facilitating the stabilization of the rotation track of the rotating end cover 20.

[0084] Specifically, the fixed end cover 32 is sleeved on the rotating end cover 20, and the clamping block 325 at least partially extends into the clamping groove 27. During the rotation of the rotating end cover 20, the path of the clamping block 325 extending along the clamping groove 27 slides in the clamping groove 27. The axial dimension of the clamping block 325 along the containing tube 11 can be the same as or slightly smaller than the radial dimension of the clamping groove 27 along the containing tube 11, so that the clamping block 325 is clamped on the wall surface of the clamping groove 27 in the radial direction, thereby limiting the rotation track. The shape of the clamping block 325 can be a block, a prism, a cylinder, a sphere, a hemisphere or other irregular shapes. For example, the clamping block 325 is a triangular prism as shown in Figure 5

[0085] ​Optionally, the engaging position of the engaging groove 27 and the engaging block 325 is staggered with the matching position of the first limiting part 321 and the second limiting part 21 along the axial direction of the containing tube 11. For example, taking the axial direction of the containing tube 11 as the up-down direction, the fixed end cover 32 and the rotating end cover 20 are each provided with two groups at the two ends of the axial direction of the containing tube 11. At the upper end of the containing tube 11, the engaging groove 27 and the engaging block 325 are located above the first limiting part 321 and the second limiting part 21, and at the lower end of the containing tube 11, the engaging groove 27 and the engaging block 325 are located below the first limiting part 321 and the second limiting part 21.

[0086] For example, the outer circumferential surface of the rotating end cover 20 is formed with the engaging groove 27, and the engaging groove 27 surrounds the rotating end cover 20 along the circumferential direction of the containing tube 11. The inner wall surface of the fixed end cover 32 is provided with the engaging block 325 engaged with the engaging groove 27, and the engaging block 325 protrudes from the inner wall surface of the fixed end cover 32 and extends into the engaging groove 27. During the rotation of the rotating end cover 20 relative to the fixed end cover 32 and the containing tube 11, the engaging block 325 slides in the engaging groove 27 along the extension path of the engaging groove 27, and the engaging block 325 also moves relative to the rotating end cover 20.

[0087] In this embodiment, the outer circumferential surface of the connecting plate 23 can be formed with the protruding rib 28, which can surround the rotating end cover 20 along the radial direction of the containing tube 11. The side surface of the protruding rib 28 along the axial direction of the containing tube 11 is opposite to the end surface 22, and the protruding rib 28, the end surface 22 and the outer circumferential surface of the connecting plate 23 together form the engaging groove 27. The second limiting part 21 can be formed on the protruding rib 28, as shown in the figure, the second limiting part 21 is arranged at the top of the protruding rib 28 away from the outer circumferential surface of the connecting plate 23, and protrudes from the top end surface 22 of the protruding rib 28 along the radial direction of the containing tube 11 to form the protrusion 211. Figure 5 Figure 5

[0088] Optionally, the number of engaging blocks 325 is at least one, for example, the number of engaging blocks 325 is two and the two engaging blocks 325 are arranged opposite along the radial direction to increase the structural stability.

[0089] The aerosol generating device (not shown in the figure) of the embodiment of the present application comprises the heating assembly 10 of any of the above embodiments.

[0090] In the aerosol generating device of the embodiment of the present application, the rotating end cover 20 drives the heating element 12 to move along the circumferential direction of the containing tube 11 during the rotation, and the rotation angle is adjusted according to the difference between the radial dimensions of the heating element 12 and the containing tube 11, so as to realize the effect that the heating element 12 is tightly attached to the wall surface of the containing tube 11, improve the efficiency of heat transfer from the heating element 12 to the containing tube 11, and further improve the heating speed and optimize the heating effect.

[0091] ​In the description of the specification, the description using the terms "one embodiment", "some embodiments", "certain embodiments", "exemplary embodiment", "example", "specific example", or "some examples" etc. means that the particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the application. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily intended to refer to the same embodiment or example. Moreover, the particular features, structures, materials or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0092] Although embodiments of the present application have been shown and described, it would be appreciated by those skilled in the art that changes, modifications, alternatives and variations to these embodiments could be made without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A heat generating component, characterized by The heating assembly comprises: a containing tube for containing an aerosol generating substrate; a heating body sleeved outside the containing tube; a rotating end cover sleeved on the containing tube, an end portion of the heating body being threaded through the rotating end cover; and a fixing device comprising a mounting cylinder and a fixing end cover, the mounting cylinder being covered outside the containing tube, the fixing end cover being covered at an end portion of the mounting cylinder, the fixing end cover and the rotating end cover being nested with each other, the rotating end cover being configured to rotate relative to the containing tube and the fixing end cover; wherein the fixing end cover is provided with first limiting portions arranged in a circumferential direction, and the rotating end cover is provided with second limiting portions which cooperate with the first limiting portions during rotation of the rotating end cover to limit a rotation angle of the rotating end cover. The heating body comprises a main body portion and an electrical connection end portion, the main body portion being substantially cylindrical and sleeved on the containing tube, and the electrical connection end portion being connected to an end portion of the main body portion and used for accessing an external circuit; 2. The heat generating component of claim 1, wherein, The rotating end cover is provided with a wire outlet slot, the electrical connection end portion is threaded through the wire outlet slot, and the rotating end cover is configured to move the electrical connection end portion when rotating relative to the containing tube, so that the main body portion is tightened and fitted to the containing tube. The main body portion is spirally arranged around the containing tube and extends along an axial direction of the containing tube.

3. The heat generating assembly of claim 2, wherein, The wire outlet slot is formed in an inner circumferential surface of the rotating end cover abutting against the containing tube.

4. The heat generating component of claim 2, wherein, The rotating end cover is sleeved at both axial ends of the containing tube to limit a position of the heating body in an axial direction of the containing tube.

5. The heat generating component of claim 1, wherein, One of the first limiting portions and the second limiting portions is a protrusion, and the other is a groove matched with the protrusion.

6. The heat generating component of claim 1, wherein, The fixing end cover is sleeved outside the rotating end cover, the first limiting portions are formed on an inner wall surface of the fixing end cover, and the second limiting portions are formed on an outer circumferential surface of the rotating end cover.

7. The heat generating assembly of claim 6, wherein, The number of the first limiting portions is a plurality, and the first limiting portions are all formed as the grooves, the plurality of grooves being uniformly arranged in a circumferential direction of the containing tube.

8. The heat generating component of claim 7, wherein, The number of the second limiting portions is at least one, and the second limiting portions are formed as the protrusions, the protrusions being sequentially engaged with adjacent grooves during rotation of the rotating end cover to limit a division value of a rotation angle of the rotating end cover, the division value being an included angle between lines connecting adjacent grooves and a rotation center of the rotating end cover. One of an outer circumferential surface of the rotating end cover and an inner wall surface of the fixing end cover is formed with a clamping groove, and the other is provided with a clamping block slidingly matched with the clamping groove, the clamping groove extending in a circumferential direction of the containing tube.

9. The heat generating component of claim 7, wherein, The heating assembly comprises any one of claims 1-9.

10. An aerosol-generating device comprising: ​

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