Aerosol-generating device and aerosol-generating system

Abstract

The invention relates to an aerosol generating device and an aerosol generating system. The aerosol generating device comprises a shell and an atomization assembly arranged in the shell. The atomization assembly comprises a supporting frame, wherein a containing cavity used for containing at least part of the aerosol generating product is formed in the supporting frame; the isolating layer is arranged outside the supporting frame; and the induction coil is arranged between the support frame and the isolation layer. The minimum distance between the outer wall face of the supporting frame and the inner wall face of the isolation layer in the radial direction is smaller than or equal to the width size of the section of a wire material forming the induction coil in the radial direction, space can be saved, and the device is miniaturized and convenient to hold.

Description

Technical Field

[0001] The present invention relates to the field of atomization technology, and more specifically, to an aerosol generating device and an aerosol generating system. Background Art

[0002] An aerosol generating device is a small device that heats the atomizing medium by heating without burning to form an inhalable aerosol. Current aerosol generating devices usually use electromagnetic induction heating or resistance material heating. Among them, an aerosol generating device using electromagnetic induction heating generally includes an induction coil, a support frame for the induction coil to be installed, and other structures arranged around the induction coil. Usually, this electromagnetic induction heating structure is not compact enough, which is not conducive to the miniaturization of the device. Summary of the invention

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

[0004] The technical solution adopted by the present invention to solve the technical problem is: construct an aerosol generating device, including a housing and an atomizing component arranged in the housing,

[0005] The atomizing assembly comprises:

[0006] A support frame, wherein a receiving cavity for receiving at least part of the aerosol generating product is formed in the support frame;

[0007] An isolation layer disposed outside the support frame; and

[0008] an induction coil disposed between the support frame and the isolation layer,

[0009] The minimum distance in the radial direction between the outer wall surface of the support frame and the inner wall surface of the isolation layer is less than or equal to the radial width dimension of the cross section of the wire material forming the induction coil.

[0010] In some embodiments, an outer wall surface of the support frame and / or an inner wall surface of the isolation layer is recessed to form an installation groove for installing the induction coil.

[0011] In some embodiments, a minimum distance in the radial direction between an outer wall surface of the support frame and an inner wall surface of the isolation layer is greater than zero.

[0012] In some embodiments, the isolation layer includes a magnetic isolation layer and a thermal isolation layer wrapped outside the magnetic isolation layer.

[0013] In some embodiments, the induction coil includes at least two coils wound in parallel.

[0014] In some embodiments, the cross section of the wire material is flat, and the width dimension of the cross section of the wire material in the radial direction is smaller than the length dimension in the axial direction.

[0015] In some embodiments, the aerosol-generating article comprises a susceptor, and the length of the induction coil in the axial direction is greater than or equal to the length of the susceptor in the axial direction.

[0016] In some embodiments, the atomization assembly further includes an infrared tube disposed in the accommodating cavity.

[0017] In some embodiments, the aerosol generating device further comprises a battery and a circuit board disposed in the housing,

[0018] The battery and the atomizer assembly are arranged along the axial direction of the housing.

[0019] The circuit board extends along the axial direction of the housing and is arranged side by side with the battery and the atomizer assembly.

[0020] The present invention also provides an aerosol generating system, comprising the aerosol generating device as described above and an aerosol generating product at least partially accommodated in the aerosol generating device.

[0021] The implementation of the present invention has at least the following beneficial effects: the minimum distance between the outer wall surface of the support frame and the inner wall surface of the isolation layer is less than or equal to the wire diameter of the induction coil, which can save space, make the device miniaturized and easy to hold. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0023] Figure 1 is a schematic diagram of the three-dimensional structure of an aerosol generating system in some embodiments of the present invention;

[0024] Figure 2 yes Figure 1 A schematic diagram of the longitudinal cross-sectional structure of the aerosol generating system shown;

[0025] Figure 3 yes Figure 1 A schematic diagram of the exploded structure of the aerosol generating system shown;

[0026] Figure 4 yes Figure 3 AA longitudinal cross-section of the aerosol generating system shown;

[0027] Figure 5 yes Figure 3 Schematic diagram of the three-dimensional structure of the atomization component;

[0028] Figure 6 yes Figure 5 A BB longitudinal cross-sectional view of the atomizing assembly when the aerosol generating product is inserted;

[0029] Figure 7 yes Figure 5 A CC longitudinal cross-sectional view of the atomizing assembly shown;

[0030] Figure 8 yes Figure 5 A schematic diagram of the exploded structure of the atomization assembly shown;

[0031] Fig. 9 yes Figure 8 Schematic diagram of the three-dimensional structure of the middle support frame;

[0032] Fig.10 It is a partial cross-sectional view of the atomization assembly in some modified embodiments of the present invention. DETAILED DESCRIPTION

[0033] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0034] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings or the orientations or positional relationships in which the product of the present invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] Figures 1 to 4 An aerosol generating system 1 in some embodiments of the present invention is shown, and the aerosol generating system 1 includes an aerosol generating device 100 and an aerosol generating product 200 at least partially contained in the aerosol generating device 100. The aerosol generating device 100 is used to generate heat after being powered on to heat the aerosol generating product 200 contained therein, and release the aerosol in the aerosol generating product 200 in a non-combustion state. The heating method of the aerosol generating device 100 is not limited, for example, it can adopt one or a combination of heat conduction, electromagnetic, infrared radiation, ultrasound, microwave, plasma, etc.

[0039] In some embodiments, the aerosol generating article 200 may be cylindrical and include an outer layer 260 and an atomizing medium 220 disposed in the outer layer 260. The atomizing medium 220 is used to generate an aerosol after being heated, and may include one or more of a filament, a sheet, a granular, a powder, a paste, etc. The heating atomization temperature of the atomizing medium 220 is generally 220° C. to 260° C. Of course, in other embodiments, the aerosol generating article 200 is not limited to being cylindrical, and may also be in other shapes such as an elliptical column or a racetrack column.

[0040] Furthermore, the aerosol generating product 200 may further include a plug 210, a stopper 240 and a filter 250 disposed in the outer envelope 260. The plug 210, the atomizing medium 220, the stopper 240 and the filter 250 may be disposed sequentially from bottom to top in the axial direction. One end of the aerosol generating product 200 inserted into the aerosol generating device 100 is closed by the plug 210, so that the residue of the atomizing medium 220 does not fall and contaminate the aerosol generating device 100. Of course, in other embodiments, the aerosol generating product 200 may not include the plug 210.

[0041] The stopper 240 abuts against the upper end of the atomizing medium 220, and can be made of high temperature resistant materials such as silicone or plastic. The stopper 240 is formed with at least one airflow channel 241 for airflow. Preferably, the stopper 240 is formed with a plurality of airflow channels 241 evenly distributed in an array, so as to fully and evenly output the aerosol in the atomizing medium 220.

[0042] The aerosol generating device 100 may include a housing 10 and a battery 20, an atomizing assembly 30 and a circuit board 50 disposed in the housing 10. An atomizing chamber 310 for accommodating at least part of the aerosol generating product 200 is formed in the atomizing assembly 30, and a socket 110 for inserting the aerosol generating product 200 into the atomizing chamber 310 is formed on the top wall of the housing 10. The aperture of the socket 110 may be larger than the outer diameter of the aerosol generating product 200, which can facilitate the insertion of the aerosol generating product 200. The circuit board 50 is electrically connected to the atomizing assembly 30 and the battery 20, respectively, and is provided with a related control circuit for controlling the power on and off of the atomizing assembly 30 by the battery 20, and can also be used to control the power provided by the battery 20 to the atomizing assembly 30.

[0043] In some embodiments, the aerosol generating device 100 may further include a dust cover 40 disposed on the housing 10 for covering or revealing the socket 110. The dust cover 40 is slidably disposed on the top wall of the housing 10. When the aerosol generating product 200 does not need to be heated, the dust cover 40 can be pushed to cover the socket 110 to prevent dust from entering the socket 110; when the aerosol generating product 200 needs to be heated, the dust cover 40 can be pushed to reveal the socket 110, which is convenient for operation.

[0044] The atomizer assembly 30 and the battery 20 can be arranged up and down in the axial direction of the housing 10, so that the aerosol generating device 100 can be in the shape of an elongated column, that is, the aerosol generating device 100 has a smaller cross-sectional dimension (such as length, width or diameter, etc.), which is convenient for the user to hold and use with one hand. The circuit board 50 can extend along the axial direction of the housing 10, and can be arranged side by side with the atomizer assembly 30 and / or the battery 20 in the transverse direction, which is convenient for the connection between the circuit board 50 and the battery 20 and the atomizer assembly 30, etc., and is conducive to the miniaturization of the device. Specifically, in the present embodiment, the aerosol generating device 100 is roughly in the shape of an elongated square column. In other embodiments, the aerosol generating device 100 may also be in other shapes such as a cylindrical or runway-shaped column.

[0045] A functional module 60 may also be provided on the side wall of the housing 10, and the functional module 60 includes but is not limited to a key switch 61 and an indicator light 62. The functional module 60 may be provided in the upper part of the housing 10, so that the thumb of one hand can control the key operation when the housing 10 is held by a person, and the user can hold and observe the housing. Preferably, the circuit board 50 may extend to the position corresponding to the functional module 60, so as to facilitate the setting of the key switch 61, the indicator light 62 and other circuits, reduce the circuits and save space.

[0046] In some embodiments, at least one air inlet 130 may be provided on the bottom wall of the housing 10 away from the socket 110. When the user holds it for use, it is not easy for the human hand to pinch the air inlet 130 provided at the bottom of the housing 10, thereby making the suction and air intake smoother and providing a better user experience. Furthermore, in the present embodiment, there are a plurality of air inlet holes 130 and they are evenly distributed in an array to prevent the inability to suction when a single hole is blocked. In addition, the cross-sectional area of ​​a single air inlet hole 130 is small, which is conducive to reducing the leakage of condensate and preventing foreign impurities from entering the housing 10. Of course, in other embodiments, there may be only one air inlet hole 130, and / or the air inlet hole 130 may also be provided on the side wall of the housing 10.

[0047] In some embodiments, the housing 10 may include a cylindrical housing 12, a top cover 11 covering the upper end of the cylindrical housing 12, and a bottom cover 13 covering the lower end of the cylindrical housing 12. The socket 110 is formed on the top cover 11, and the air inlet 130 is formed on the bottom cover 13. Of course, in other embodiments, the cylindrical housing 12 and the top cover 11 and / or the bottom cover 13 may also be integrally formed.

[0048] In some embodiments, the aerosol generating device 100 may further include an air inlet pipe 70 disposed in the housing 10, and the inner wall surface of the air inlet pipe 70 defines an air inlet channel 71 connecting the air inlet hole 130 and the atomization chamber 310. The air inlet channel 71 is an independent airway formed by the air inlet pipe 70. Compared with the conventional airway structure formed by other structural gaps inside the housing 10, when the user inhales, since the airflow does not pass through other structural gaps, the suction resistance is smaller, the airflow is more concentrated, and the user experience is better. In addition, since the airflow does not pass through other structures, it can also reduce the gas staying in other structures, thereby avoiding contamination of other structures inside the product.

[0049] The air inlet pipe 70 can extend along the axial direction of the housing 10, which is conducive to the miniaturization of the device. The lower end of the air inlet pipe 70 is connected to the air inlet hole 130, and the upper end is connected to the atomizing chamber 310. In some embodiments, the air inlet pipe 70 and the atomizing chamber 310 are staggered in the transverse direction, that is, the orthographic projections of the air inlet pipe 70 and the atomizing chamber 310 on the same horizontal plane do not overlap. On the one hand, it can reduce the condensate in the atomizing chamber 310 flowing into the air inlet pipe 70 under the action of gravity and contaminating and clogging the air inlet pipe 70. On the other hand, it is also conducive to the installation of the air inlet pipe 70 in the housing 10. The air inlet pipe 70 does not need to be bent to avoid other structures, and the suction resistance is smaller.

[0050] In some embodiments, the aerosol generating device 100 may further include an airflow sensing device 80 disposed in the housing 10. The airflow sensing device 80 may include a mounting sleeve 82 and an airflow sensor 81 at least partially embedded in the mounting sleeve 82. The airflow sensor 81 is electrically connected to the circuit board 50 and is in air communication with the air inlet channel 71. It can sense the airflow change when the user inhales and generate an inhalation signal. The inhalation signal can be transmitted to the control circuit to start the aerosol generating device 100 and start the battery 20 to power the atomization assembly 30. In some embodiments, the airflow sensor 81 can also calculate the number of puffs by the change in air pressure during each inhalation. Since the air inlet channel 71 is an independent airway formed by the air inlet pipe 70, the airflow sensor 81 is connected to the air inlet channel 71 to improve the sensitivity of the airflow sensor 81, so that the number of puffs can be calculated more accurately.

[0051] Furthermore, the airflow sensing device 80 can be housed at the bottom of the housing 10, and the airflow sensor 81 can be connected to the air inlet 710 at the lower end of the air inlet channel 71. The condensate generated by suction is difficult to flow to the air inlet 710, which can prevent the condensate from contaminating the airflow sensor 81.

[0052] The bottom surface of the mounting sleeve 82 is recessed to form an air guide groove 820. When the airflow sensing device 80 is assembled into the housing 10, the bottom opening of the air guide groove 820 is covered by the bottom wall of the housing 10 to form an air guide channel 821 connected to the air inlet hole 130. The lower end of the air inlet pipe 70 can be embedded in the mounting sleeve 82 and connected to the air guide channel 821. In some embodiments, the mounting sleeve 82 can be made of elastic materials such as silicone, which has good sealing performance and facilitates the assembly of the airflow sensor 81 and the air inlet pipe 70. It can be understood that in other embodiments, the mounting sleeve 82 is not limited to the silicone material; in other embodiments, the air guide channel 821 can also be formed by the recess of the housing 10.

[0053] In some embodiments, the airflow sensor 81 can be arranged on the side of the mounting sleeve 82 away from the air inlet 710, and the bottom surface of the airflow sensor 81 is connected to the side of the air guide groove 820 away from the air inlet 710. In this way, even if condensation accumulates at the air inlet 710, the accumulated condensation will flow downward due to gravity and will not accumulate on the airflow sensor 81.

[0054] like Figures 2 to 8 As shown, in some embodiments, the atomization assembly 30 includes a support frame 33 and a heating assembly 30a disposed inside and / or outside the support frame 33. A receiving cavity 330 having an opening at one end is formed in the support frame 33, for receiving at least part of the aerosol generating product 200. The heating assembly 30a is electrically connected to the circuit board 50, and is used to generate heat after power is supplied, so as to heat the aerosol generating product 200.

[0055] In some embodiments, the heating component 30a may include an induction coil 35, which is electrically connected to the circuit board 50 and is used to generate an electromagnetic field after power is turned on. In some embodiments, the induction coil 35 may be in a spiral tubular shape and wound around the outside of the atomizing chamber 310, and it may be coaxially arranged with the atomizing chamber 310, but is not limited to a coaxial arrangement.

[0056] The cross-sectional shape of the wire material forming the induction coil 35 is not limited, for example, it can be circular, or flat, such as elliptical, racetrack-shaped or rectangular. Preferably, the induction coil 35 is a flat coil, which can be made of a flat wire or a Litz cable. Specifically, the cross-sectional shape of the wire material forming the induction coil 35 is flat, and the length dimension h of the cross-sectional shape of the wire material in the axial direction is greater than the width dimension w in the radial direction, which can reduce energy loss, is easier to manufacture than a round coil, and is conducive to reducing the size of the device.

[0057] Specifically, the conductor material of the induction coil 35 extends along the magnetic field axis of the coil, so that a fairly homogenous electromagnetic field along the magnetic field axis of the coil can be generated inside the coil. The conductor material extends to a lesser extent in the radial direction, which can reduce energy losses in the coil, in particular, capacitance losses, and is also conducive to minimizing the outer diameter of the induction coil 35, which is conducive to miniaturization of the device.

[0058] In some embodiments, the induction coil 35 may include two coils wound in parallel, and the two coils have the same resonant frequency, so as to generate a uniform temperature field. Of course, in other embodiments, the two coils may also have different resonant frequencies to meet different temperature field requirements. In other embodiments, the induction coil 35 may also include one or more than two coils.

[0059] Accordingly, the aerosol generating article 200 further comprises a susceptor 230 coupled to the induction coil 35. The susceptor 230 comprises a susceptor material or is made of a susceptor material. The term "susceptor material" is used to describe a material that can convert electromagnetic energy into heat. When the aerosol generating article 200 is inserted into the atomization chamber 310, the susceptor 230 is located within the electromagnetic field generated by the induction coil 35, and the electromagnetic field can generate eddy currents in the susceptor 230, which can heat the susceptor 230 through ohmic or resistive heating, thereby heating the aerosol generating article 200. In the case where the susceptor 230 comprises a ferromagnetic material (e.g., iron, nickel, cobalt), the susceptor 230 can be further heated due to hysteresis losses.

[0060] The susceptor material may be formed of any material that can be heated by induction to a temperature sufficient to cause the aerosol generating article 200 to generate an aerosol. Suitable susceptor materials may include one or more of graphite, molybdenum, silicon carbide, stainless steel, niobium, aluminum, nickel, nickel-containing compounds, titanium, and metal material composites. Preferably, the susceptor material comprises a metal or carbon. Further, the susceptor material may include or be composed of a ferromagnetic material, which may include ferritic iron, a ferromagnetic alloy (e.g., ferromagnetic steel or stainless steel), ferromagnetic particles, or a ferrite. In some embodiments, the susceptor material may include a 400 series stainless steel, such as 410 stainless steel, 420 stainless steel, or 430 stainless steel.

[0061] The susceptor 230 may be disposed in the outer cladding 260 and in contact with the atomized medium 220, so that heat can be directly transferred to the atomized medium 220, with fast heat transfer and high energy utilization. Of course, in other embodiments, the susceptor 230 may not be disposed in the outer cladding 260, and it may also be disposed outside the outer cladding 260.

[0062] In some embodiments, the susceptor 230 may be in the form of a sheet and inserted into the atomized medium 220. The susceptor 230 may be coaxially arranged with the atomized medium 220, and the upper and lower ends of the susceptor 230 may be flush with the upper and lower ends of the atomized medium 220, respectively, which is conducive to quickly and evenly heating the atomized medium 220. In addition, the projection of the susceptor 230 on the stopper 240 along the axial direction may also overlap with the airflow channel 241, which can reduce the heat transferred to the stopper 240. Of course, in other embodiments, the axial length of the susceptor 230 may also be less than the axial length of the atomized medium 220, so that there is a certain interval between the susceptor 230 and the stopper 240 and / or the plug 210 in the axial direction, so as to avoid the stopper 240 and the plug 210 from generating excessively high temperatures and generating impurities, which affects the suction taste. In addition, in other embodiments, the shape of the susceptor 230 may also be unrestricted, for example, it may also include other shapes such as spherical, filamentary, and cylindrical.

[0063] When the axial length of the induction coil 35 is greater than or equal to the axial length of the receptor 230, the heating efficiency of the receptor 230 can be guaranteed; when the axial length of the induction coil 35 is less than the axial length of the receptor 230, it can prevent the limiter 240 and the plug 210 from generating excessively high temperatures and generating impurities, thereby affecting the smoking taste.

[0064] In some embodiments, the heating component 30a includes an infrared tube 31, which can be arranged in the accommodating cavity 330, and the atomizing cavity 310 can be formed in the infrared tube 31. The induction coil 35 surrounds the infrared tube 31 and can be coaxially arranged with the infrared tube 31, but is not limited to the coaxial arrangement. The infrared tube 31 can radiate infrared rays when heated to heat the aerosol generating product 200 in the atomizing cavity 310. The infrared heating method can improve the heating uniformity and utilization rate of the aerosol generating product 200, and can avoid the problem of the aerosol generating product 200 being burned due to local high temperature. In some embodiments, the infrared tube 31 can be made of ceramic or quartz material, which has the advantages of easy cleaning, low cost, and no odor. Of course, in other embodiments, the infrared tube 31 can also be other materials such as metal or conductive carbon, which can be selected according to needs.

[0065] It can be understood that in some other embodiments, the heating component 30a may also include only one of the induction coil 35 and the infrared tube 31, and / or the heating component 30a may also include other heating elements such as a resistive heating film.

[0066] In some embodiments, the atomizer assembly 30 may further include an isolation layer 36 disposed outside the support frame 33 and / or the induction coil 35. In some embodiments, the induction coil 35 may be sleeved outside the support frame 33 and located between the support frame 33 and the isolation layer 36. The support frame 33 may be made of a material such as ceramic, glass, plastic or metal that is resistant to high temperatures and cannot induce heat due to a magnetic field.

[0067] In some embodiments, the isolation layer 36 may include a magnetic isolation layer 361 and / or a thermal insulation layer 362. The magnetic isolation layer 361 surrounds the induction coil 35 to reduce the electromagnetic radiation of the induction coil 35 to the outside. The thermal insulation layer 362 includes but is not limited to aerogel. The thermal insulation layer 362 is wrapped outside the magnetic isolation layer 361, which can reduce the heat transferred to the outside by the atomization component 30 and make the thermal insulation effect of the atomization component 30 better. A thermal insulation layer 32, including but not limited to aerogel, may also be provided between the infrared tube 31 and the support frame 33, which is beneficial to reduce heat transfer and improve the thermal insulation effect. In addition, the support frame 33 may also be made of thermal insulation material.

[0068] In other embodiments, the induction coil 35 may also be disposed in the support frame 33, so that the coil can be avoided from being disturbed when the components outside the support frame 33 are subsequently installed. In other embodiments, the support frame 33 and the induction coil 35 and / or the isolation layer 36 may also be integrally disposed, for example, Fig.10 In the illustrated embodiment, the induction coil 35 and the magnetic isolation layer 361 can be integrally formed in the support frame 33 by sintering or injection molding.

[0069] For example Figure 4 and Figures 6 to 9 As shown, in some embodiments, the minimum radial distance d between the outer wall surface of the support frame 33 and the inner wall surface of the isolation layer 36 is greater than zero, so that the outer wall surface of the support frame 33 and the inner wall surface of the isolation layer 36 do not contact each other, so that a certain air layer is formed between the outer wall surface of the support frame 33 and the inner wall surface of the isolation layer 36, which is beneficial to reduce heat transfer and achieve better thermal insulation effect.

[0070] In some embodiments, the minimum radial distance d between the outer wall of the support frame 33 and the inner wall of the isolation layer 36 is less than or equal to the radial width w of the cross section of the wire material forming the induction coil 35, which can save space, make the device miniaturized and easy to hold.

[0071] Generally, the installation groove 335 for installing the induction coil 35 can be formed by recessing the outer wall surface of the support frame 33 and / or the inner wall surface of the isolation layer 36, so that the minimum distance between the outer wall surface of the support frame 33 and the inner wall surface of the isolation layer 36 is less than or equal to the wire diameter of the induction coil 35. Specifically, in this embodiment, the outer wall surface of the support frame 33 is recessed to form a spiral installation groove 335, and the induction coil 35 is wound in the installation groove 335.

[0072] In some embodiments, the inner wall surface of the support frame 33 protrudes to form a support surface 3321 for the lower end of the aerosol generating article 200 to abut against, and the outer wall surface of the support frame 33 also protrudes to form a support surface 336 for the lower end of the induction coil 35 to abut against. The support surface 3321 and the support surface 336 can both be annular, but are not limited to annular. The support surface 3321 and the support surface 336 cooperate so that the position of the induction coil 35 corresponds to the position of the susceptor 230.

[0073] The accommodating chamber 330 can be formed by the top surface of the support frame 33 extending axially downward, and the bottom of the accommodating chamber 330 is closed by the bottom wall 334 of the support frame 33, so as to reduce leakage. In some embodiments, there is a certain interval between the supporting surface 3321 and the bottom wall 334, so that when the aerosol generating product 200 is inserted into the atomizing assembly 30, the bottom surface of the aerosol generating product 200 is against the supporting surface 3321, and a cavity 333 is formed between the bottom surface of the aerosol generating product 200 and the bottom wall 334. The cavity 333 can accommodate the condensed liquid formed by the aerosol generating product 200 sucking, and prevent the airflow from directly carrying away the condensed liquid during suction, which affects the suction experience. In addition, it is also convenient for the user to pull out the aerosol generating product 200 and to use tools to clean the accommodating chamber 330.

[0074] Specifically, the accommodating cavity 330 may adopt a stepped design, which includes an accommodating cavity 331, a fixed cavity 332, and a cavity 333 arranged in sequence from top to bottom along the axial direction. The apertures of the accommodating cavity 331, the fixed cavity 332, and the cavity 333 decrease in sequence, and the stepped surface between the accommodating cavity 331 and the fixed cavity 332 forms a circular support surface 3311, and the stepped surface between the fixed cavity 332 and the cavity 333 forms a circular support surface 3321. The infrared tube 31 is accommodated in the accommodating cavity 331, and the bottom surface of the infrared tube 31 can be against the support surface 3311. The heat insulation layer 32 is arranged between the outer wall surface of the infrared tube 31 and the cavity wall surface of the accommodating cavity 331. The aperture of the fixed cavity 332 can match the outer diameter of the aerosol generating article 200 (or the outer diameter of the plug 210), for example, the aperture of the fixed cavity 332 is equal to, slightly larger than, or slightly smaller than the outer diameter of the aerosol generating article 200, thereby supporting and fixing the aerosol generating article 200 through the fixed cavity 332.

[0075] In some embodiments, the atomizer assembly 30 may further include an end cap 38 disposed at the upper end of the support frame 33, and the infrared tube 31 is pressed against the support surface 3311 for fixing through the end cap 38. A plug hole 3810 for inserting the aerosol generating product 200 is formed through the end cap 38, and the hole diameter of the plug hole 3810 may be larger than the outer diameter of the aerosol generating product 200, so as to facilitate the insertion of the aerosol generating product 200.

[0076] The end cover 38 and the support frame 33 can be fixed to each other by means of a snap connection, and of course, they can also be fixed to each other by other means such as screw connection. Specifically, in some embodiments, the end cover 38 may include an end cover body 381 and two clamping arms 382 extending downward from the outer periphery of the end cover body 381. The end cover body 381 is annular, and a plug hole 3810 is formed along the axial direction. The two clamping arms 382 are symmetrically arranged on the radial sides of the end cover body 381, and each clamping arm 382 is respectively provided with a clamping groove 3821. The radial sides of the outer wall surface of the upper end of the support frame 33 are respectively protruding outward to form two clamps 338, and the two clamps 338 are respectively engaged with the clamping grooves 3821 on the two clamping arms 382, ​​so that the end cover 38 and the support frame 33 are fixed to each other. It can be understood that in other embodiments, the number of the slots 3821 and the buckles 338 is not limited, and can be one or more than two; of course, in other embodiments, the slots 3821 can also be formed on the support frame 33, and the buckles 338 can be formed on the end cover 38.

[0077] Further, in some embodiments, a sealing gasket 391 may be provided between the end cover 38 and the infrared tube 31, and / or a sealing gasket 392 may be provided between the support surface 3311 and the infrared tube 31. The sealing gaskets 391 and 392 are both annular and may be made of elastic materials such as silicone, which can provide good air tightness and cushioning properties.

[0078] The sealing gasket 391 is penetrated by a through hole 3910 that connects the plug hole 3810 and the atomizing chamber 310. In some embodiments, a guide portion 3911 that is conducive to the introduction of the aerosol generating product 200 may be formed in the through hole 3910. In this embodiment, the inner wall surface of the through hole 3910 is protruding to form a plurality of guide portions 3911, and the plurality of guide portions 3911 are evenly spaced and arranged in the circumferential direction of the through hole 3910, and the inner wall surface of each guide portion 3911 close to the central axis of the through hole 3910 has a guide slope 3912, and the guide slope 3912 makes the cross-sectional area of ​​the through hole 3910 gradually decrease from top to bottom. Of course, in other embodiments, the guide portion 3911 may also include an annular surface whose aperture gradually decreases from top to bottom.

[0079] The support surface 336 is located between the support surface 3321 and the support surface 3311 in the axial direction of the support frame 33. On the one hand, it can fully excite various areas of the infrared tube 31, and on the other hand, it can also ensure that the plug 210 is prevented from generating excessively high temperatures and generating impurities, which affects the smoking taste. Of course, in other embodiments, the support surface 336 can also be on the same horizontal plane as the support surface 3321 or the support surface 3311.

[0080] In some embodiments, an airflow channel 337 communicating with the accommodating cavity 330 is further formed in the support frame 33. The airflow channel 337 and the accommodating cavity 330 are staggered in the lateral direction, that is, the orthographic projections of the airflow channel 337 and the accommodating cavity 330 on the same horizontal plane do not overlap, which can reduce the condensate from flowing into the airflow channel 337 and the air inlet channel 71 to pollute and block the airway.

[0081] In addition, the support frame 33 is an integrated structure. The heat generated during heating can keep the support frame 33 at a temperature and reduce the generation of condensate. At the same time, it can also atomize the condensate remaining in the support frame 33, thereby achieving a partial self-cleaning effect and improving the utilization rate of the atomization medium.

[0082] Specifically, the support frame 33 may include a main body 33a and an airway portion 33b extending outward from the outer surface of the main body 33a. The main body 33a may be substantially cylindrical with an open upper end, and the accommodating cavity 330 is formed in the main body 33a. The airway portion 33b may be arranged near the bottom of the main body 33a, and the airflow channel 337 is formed in the airway portion 33b and may be connected to the cavity 333.

[0083] The airflow channel 337 may include a first airway 3371 and a second airway 3372. The first airway 3371 extends vertically, and the upper end of the air inlet pipe 70 may be embedded in the first airway 3371 and communicate with the first airway 3371. A sealing sleeve 72 may be sleeved between the outer wall surface of the air inlet pipe 70 and the inner wall surface of the first airway 3371. The sealing sleeve 72 may be made of elastic sealing materials such as silicone to improve the air tightness between the air inlet pipe 70 and the first airway 3371. The second airway 3372 extends horizontally, and one lateral side of the second airway 3372 is communicated with the upper end of the first airway 3371, and the other lateral side of the second airway 3372 is communicated with the side of the cavity 333. The bottom surface of the second airway 3372 is higher than the bottom surface of the cavity 333, so as to prevent condensate in the cavity 333 from entering the second airway 3372. In addition, in order to facilitate the integral molding of the support frame 33 by sintering or injection molding, the side of the second air channel 3372 has an opening, and the atomizer assembly 30 also includes a sealing plug 37 for blocking the opening. Of course, in other embodiments, the support frame 33 can also be integrally molded by 3D printing or other methods, so that the side of the second air channel 3372 does not need to be opened.

[0084] In some embodiments, the atomization assembly 30 may further include a temperature sensor 34 electrically connected to the circuit board 50, and the atomization temperature is collected by the temperature sensor 34 and sent to the circuit board 50. The temperature sensor 34 includes but is not limited to a thermocouple, and the temperature measuring probe 340 of the temperature sensor 34 may be disposed in the receiving cavity 331 of the support frame 33.

[0085] Generally speaking, the temperature probe 340 of the temperature sensor 34 is placed in the atomized medium 220 of the aerosol generating product 200 to best detect the temperature of the aerosol generating product 200, but this arrangement is not conducive to the installation and insertion of the aerosol generating product 200. Preferably, the temperature probe 340 of the temperature sensor 34 is placed at the place closest to the atomized medium 220, for example, the temperature probe 340 can be placed in contact with the outer wall surface of the infrared tube 31 and is approximately located in the middle of the atomized medium 220.

[0086] It can be understood that the above-mentioned technical features can be used in any combination without limitation.

[0087] The above embodiments only express the specific 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, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the scope covered by the claims of the present invention.

Claims

1. An aerosol generating device, It is characterized in that It comprises a housing (10) and an atomizing assembly (30) arranged in the housing (10), The atomizing assembly (30) comprises: A support frame (33), wherein a receiving cavity (330) for receiving at least part of the aerosol generating product (200) is formed in the support frame (33); An isolation layer (36) disposed outside the support frame (33); and an induction coil (35) disposed between the support frame (33) and the isolation layer (36), The minimum distance in the radial direction between the outer wall surface of the support frame (33) and the inner wall surface of the isolation layer (36) is less than or equal to the radial width dimension of the cross section of the wire material forming the induction coil (35).

2. The aerosol generating device according to claim 1, It is characterized in that An outer wall surface of the support frame (33) and / or an inner wall surface of the isolation layer (36) is recessed to form a mounting groove (335) for mounting the induction coil (35).

3. The aerosol generating device according to claim 1, It is characterized in that The minimum distance in the radial direction between the outer wall surface of the support frame (33) and the inner wall surface of the isolation layer (36) is greater than zero.

4. The aerosol generating device according to claim 1, It is characterized in that The isolation layer (36) comprises a magnetic isolation layer (361) and a heat insulation layer (362) wrapped outside the magnetic isolation layer (361).

5. The aerosol generating device according to claim 1, It is characterized in that The induction coil (35) comprises at least two coils wound in parallel.

6. The aerosol generating device according to claim 1, It is characterized in that The cross section of the wire material is flat, and the width dimension of the cross section of the wire material in the radial direction is smaller than the length dimension in the axial direction.

7. The aerosol generating device according to claim 1, It is characterized in that The aerosol generating article (200) comprises a susceptor (230), and the axial length of the induction coil (35) is greater than or equal to the axial length of the susceptor (230).

8. The aerosol generating device according to claim 1, It is characterized in that The atomizing assembly (30) further comprises an infrared tube (31) arranged in the accommodating cavity (330).

9. An aerosol generating device according to any one of claims 1 to 8, It is characterized in that The aerosol generating device (100) further comprises a battery (20) and a circuit board (50) arranged in the housing (10). The battery (20) and the atomizer assembly (30) are arranged along the axial direction of the housing (10). The circuit board (50) extends along the axial direction of the housing (10) and is arranged side by side with the battery (20) and the atomization assembly (30).

10. An aerosol generating system, It is characterized in that It comprises an aerosol generating device (100) as claimed in any one of claims 1 to 9 and an aerosol generating product (200) at least partially accommodated in the aerosol generating device (100).

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