Aerosol generating device

Abstract

The utility model relates to the field of aerosol generation, in particular to an aerosol generation device. An aerosol-generating device comprising: a device housing; a heating cavity is formed in the heating part, and an aerosol generating substrate to be heated is placed in the heating cavity; the heating part is arranged in the device shell, and a gap is formed between the outer side face of the heating part and the device shell; the at least one sleeve-shaped piece is arranged outside the heating component in a sleeving mode, an air interlayer is formed between the sleeve-shaped piece and the heating component, and / or an air interlayer is formed between every two adjacent sleeve-shaped pieces; an air inlet is formed in the heating cavity, external airflow enters the heating cavity through the air inlet, and at least one air interlayer is communicated with the air inlet so that external air can flow into the heating cavity through the air interlayer. The aerosol generating device mainly solves the technical problem of how to prevent the device shell of the aerosol generating device from scalding hands.

Description

Technical Field

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

[0002] The heat source of an aerosol generating device can often reach over 250°C, but the device casing cannot feel hot to avoid affecting the user experience. Commonly used device casing materials include aluminum alloy, plastic, leather, etc. The lower the thermal conductivity of the material, the lower the perceived temperature of a person at the same temperature. For example, the thermal conductivity of PC plastic is 0.19W / m·K, which is a material with low thermal conductivity. It will only feel hot when the temperature reaches about 60°C. The design temperature of the plastic device casing is often no more than 55°C. For device casings made of aluminum alloy, due to the higher thermal conductivity, more heat will be transferred to the user, and the temperature limit of the casing will be higher. Utility Model Content

[0003] The utility model mainly solves the technical problem of how to prevent the shell of an aerosol generating device from being hot to the touch.

[0004] In a first aspect, the utility model provides an aerosol generating device.

[0005] An aerosol generating device, comprising:

[0006] Device housing;

[0007] A heating component, wherein a heating cavity is provided in the heating component, and the heating cavity is used to place the aerosol generating substrate to be heated; the heating component is arranged inside the device housing, and there is a gap between the outer side of the heating component and the device housing;

[0008] and at least one sleeve-like member, wherein the at least one sleeve-like member is sleeved outside the heating component, an air layer is formed between the sleeve-like member and the heating component, and / or an air layer is formed between two adjacent sleeve-like members;

[0009] The heating chamber is provided with an air inlet for external airflow to enter the heating chamber, and at least one of the air interlayers is connected to the air inlet so that external air can flow into the heating chamber through the air interlayer.

[0010] In a technical solution, an air layer is formed between the outermost sleeve-shaped member and the inner wall of the device housing, and the size of the air layer in the radial direction of the heating chamber is larger than other air layers.

[0011] In one technical solution, the heating component includes a matrix insertion tube and a heating needle, the heating chamber is formed by the matrix insertion tube, the matrix insertion tube has an insertion port for inserting the rod-shaped aerosol generating matrix, and the heating needle is arranged at the end of the matrix insertion tube opposite to the insertion port.

[0012] In one technical solution, a suction nozzle and a suction nozzle bracket are included, wherein the suction nozzle is fixed to one end of the matrix insertion tube provided with the insertion port;

[0013] The suction nozzle holder is fixed on the device housing, and an insertion channel is provided on the suction nozzle holder. The matrix insertion tube is inserted in the insertion channel, and the suction nozzle is supported at one end of the suction nozzle holder close to the insertion port. An anti-slip structure is provided between the matrix insertion tube and / or the suction nozzle and the insertion channel, and the anti-slip structure is used to prevent the suction nozzle and the matrix insertion tube from slipping out of the insertion channel along the opening direction of the insertion port.

[0014] In a technical solution, there is a gap between at least a portion of the inner wall of the insertion channel and the outer peripheral surface of the matrix insertion tube, the gap forms one air layer, and the nozzle bracket forms one sleeve-like member.

[0015] In one technical solution, it includes a needle mounting seat and a needle bracket, the heating needle is fixed on the needle mounting seat, the needle bracket is arranged on the side of the needle mounting seat away from the matrix insertion tube, the needle mounting seat is fixed to one end of the needle bracket close to the matrix insertion tube and forms a seal with the needle bracket, and the heating needle is inserted into the matrix insertion tube from the outside of the matrix insertion tube.

[0016] In a technical solution, an insertion port is provided at one end of the insertion channel away from the suction nozzle, and an end of the needle support close to the matrix insertion tube is inserted into the insertion port and forms a seal with the insertion channel.

[0017] In one technical solution, the heating component includes a heating tube, and the heating chamber is formed by the inner cavity of the heating tube; the sleeve-shaped member includes a first sleeve body and a second sleeve body, and the first sleeve body and the second sleeve body are sequentially arranged on the radial outside of the heating tube, and the first sleeve body and the second sleeve body are arranged separately; the aerosol generating device also includes a first connecting seat and a second connecting seat, and the first connecting seat is positioned at one axial end of the first sleeve body and the second sleeve body, and the second connecting seat is positioned at the other axial end of the first sleeve body and the second sleeve body.

[0018] In one technical solution, the heating tube has an insertion port for inserting the rod-shaped aerosol generating matrix, the first connecting seat is arranged at an end close to the insertion port, and the second connecting seat is arranged at an end away from the insertion port; a first air layer is formed between the heating tube and the first sleeve, and a second air layer is formed between the first sleeve and the second sleeve; an air inlet is provided on the side of the heating tube away from the insertion port for external airflow to enter the heating chamber, and an air supply channel is provided on the second connecting seat, and the air supply channel connects the air inlet and the second air layer.

[0019] In a technical solution, a substrate avoidance port is provided on the first connecting seat, and the substrate avoidance port is used for the aerosol generating substrate to pass through and forms an axial air inlet channel with the aerosol generating substrate; the aerosol generating device includes an annular sealing member, and the annular sealing member is arranged at one end of the first air interlayer close to the insertion port, and an air inlet channel is provided on the first connecting seat for external airflow to pass through, and the air inlet channel connects the avoidance port and the second air interlayer.

[0020] Beneficial effects of the utility model:

[0021] By arranging a sleeve-like member between the heating component and the device casing, an air layer can be formed between the sleeve-like member and the heating component, and / or an air layer can be formed between two adjacent sleeve-like members. The air layer can achieve heat insulation by relying on the principle of low thermal conductivity of air, thereby reducing the heat transferred from the heating component to the device casing; at the same time, by connecting at least one air layer with the air inlet on the heating chamber, during the process of aerosol generation by the aerosol generating device, external air can pass through the corresponding air layer, take away the hot air in the corresponding air layer and dissipate heat to the structures on both sides of the air layer, thereby effectively avoiding overheating of the device casing and affecting its use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an embodiment of an aerosol generating device in the utility model;

[0023] Figure 2 for Figure 1 AA section view;

[0024] Figure 3 for Figure 1 BB cross-sectional view;

[0025] Figure 4 for Figure 2 A partial cross-sectional view of the middle heating component;

[0026] Figure 5 is an exploded view of corresponding components of the aerosol generating device;

[0027] Figure 6 It is a schematic diagram of the assembly structure of the matrix inserting tube and the nozzle bracket;

[0028] Figure 7 for Figure 1 A schematic diagram of the direction of the suction airflow when the embodiment shown is in use;

[0029] Figure 8 is a cross-sectional view of another embodiment of the aerosol generating device in the utility model;

[0030] Fig. 9 for Figure 8 Another cross-sectional view of the aerosol generating device, the cross section being perpendicular to Figure 8 The cross section of

[0031] Fig.10 for Figure 8 Exploded view of corresponding parts at the heating part;

[0032] Fig.11 An isometric cross-sectional view of the first connecting seat and the second connecting seat and the structure therebetween;

[0033] Fig.12 is a three-dimensional diagram of a first connecting seat;

[0034] Fig.13 for Figure 8 A schematic diagram of the flow direction of suction airflow when the illustrated embodiment is in use.

[0035] List of feature names corresponding to the reference numerals in the figure:

[0036] 1100, device housing;

[0037] 1200, suction nozzle; 1210, inner layer; 1220, outer layer; 1230, claw;

[0038] 1300, nozzle bracket; 1310, shell connecting buckle; 1320, plug-in channel; 1330, limiting boss; 1340, air intake notch;

[0039] 1400, heating component; 1410, matrix inserting tube; 1411, clamping protrusion; 1412, arched protrusion; 1420, heating needle; 1430, needle body mounting seat; 1440, heating chamber; 1441, insertion port; 1450, air inlet;

[0040] 1500, needle body support; 1510, plug-in protrusion;

[0041] 1600, circuit board components;

[0042] 1710, first air interlayer; 1720, second air interlayer;

[0043] 2000, device housing;

[0044] 2100, heating tube; 2110, air inlet; 2120, heating chamber;

[0045] 2200, first set body; 2210, guide convex rib; 2220, limit convex rib;

[0046] 2300, second housing; 2310, guide groove; 2320, positioning groove;

[0047] 2400, first connecting seat; 2410, upper annular rib; 2420, matrix avoidance port; 2430, air inlet channel; 2440, air distribution groove; 2450, annular blocking member;

[0048] 2500, second connecting seat; 2510, lower annular rib;

[0049] 2600, heating tube support seat; 2610, radial communication channel;

[0050] 2710, nozzle bracket; 2720, silicone pad;

[0051] 2810, first air interlayer; 2820, second air interlayer; 2830, third air interlayer;

[0052] 3000. Aerosol generating matrix. DETAILED DESCRIPTION

[0053] The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0054] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0055] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0056] In the embodiment of the aerosol generating device of the utility model, by setting an air layer between the heat source and the device housing 1100, the low thermal conductivity of air can be utilized to reduce heat transfer to the device housing 1100, and the air layer can be connected to the air inlet 1450 on the heating chamber 1440, which will also drive the air in the corresponding air layer to flow and take away the heat during inhalation, thereby effectively avoiding heat transfer to the device housing 1100 and causing the device housing 1100 to be hot.

[0057] Embodiment of the aerosol generating device in the utility model:

[0058] Please refer to Figures 1 to 3 In one embodiment, the aerosol generating device includes a device housing 1100, a nozzle 1200 disposed at the upper end of the device housing 1100, and also includes a heating component 1400, a nozzle bracket 1300, a needle bracket 1500, a power module, and a circuit board component 1600 disposed in the device housing 1100. Among them, the power module is used to power the electrical part in the aerosol generating device, and the circuit board component 1600 is used to achieve electrical control. Those skilled in the art can understand that the above-mentioned power module and circuit board component 1600 can refer to related structures, and may have no direct connection with the improvement direction of the utility model, so they will not be described in detail in this specification.

[0059] In one embodiment, the nozzle 1200, the nozzle support 1300, the heating component 1400 and the needle support 1500 are arranged in sequence in the vertical direction, and the aerosol generating device further comprises a substrate insert tube 1410 disposed in the nozzle support 1300. The heating component 1400 of the aerosol generating device is mainly composed of the substrate insert tube 1410, the heating needle 1420 and the needle mounting seat 1430. The heating component 1400 is disposed inside the device housing 1100 to constitute a heat source, and there is a gap between the outer side of the heating component 1400 and the device housing 1100. In order to prevent the device housing 1100 from being overheated due to heat transfer, the aerosol generating device further comprises at least one sleeve-shaped member, which is disposed in the above-mentioned gap, and at least one sleeve-shaped member is sleeved outside the heating component 1400, and an air interlayer is formed between the sleeve-shaped member and the heating component 1400, and / or an air interlayer is formed between two adjacent sleeve-shaped members, so that heat conduction can be blocked by the air interlayer. The specific structure of the sleeve and the air interlayer will be described in detail below.

[0060] In order to more clearly illustrate the specific implementation and technical solutions of the present utility model, the directions of up, down, left, right, front and back in the corresponding embodiments of this specification are based on Figure 2 The front-to-back direction is perpendicular to the up-down direction and the left-to-right direction. Of course, the orientation limitation in the embodiment is only an example to more clearly illustrate the positional relationship between the various components, and does not limit the specific implementation methods and technical solutions of the utility model to be arranged in this way.

[0061] The substrate inserting tube 1410 in the heating component 1400 is provided with a heating chamber 1440, and the heating chamber 1440 is used to place the aerosol generating substrate 3000 to be heated. In a specific embodiment, the substrate inserting tube 1410 has an insertion port 1441 for inserting the rod-shaped aerosol generating substrate 3000, and the heating needle 1420 is arranged at the end of the substrate inserting tube 1410 opposite to the insertion port 1441. Figures 2 to 4 It can be understood that the heating needle 1420 is fixed on the needle body mounting seat 1430, the needle body bracket 1500 is arranged on the side of the needle body mounting seat 1430 away from the matrix inserting tube 1410, that is, the lower side of the needle body mounting seat 1430, the needle body mounting seat 1430 is fixed to one end of the needle body bracket 1500 close to the matrix inserting tube 1410 and forms a seal with the needle body bracket 1500, and the heating needle 1420 is inserted into the matrix inserting tube 1410 from the outside of the matrix inserting tube 1410, which can be easily assembled. Of course, when the bottom of the matrix inserting tube 1410 is a sealing structure, a avoidance hole can be set on the sealing structure at the bottom for the heating needle 1420 to penetrate.

[0062] The heating pin 1420 may include a ceramic pin body and a metal wire. The ceramic pin body can withstand high temperatures and is conducive to preventing heat from being transferred to adjacent components. The heat of the heating pin 1420 is generated by the metal wire. By controlling the current passing through the metal wire, the heating power can be controlled. The metal wire can be connected to the circuit board component 1600 through a wire.

[0063] It should be noted that the heating needle 1420 in the present invention is only an example of the heating component 1400. In some other embodiments, the heating component 1400 may also be other structures, such as a heating core with upper and lower through holes, and the air is heated through the through holes, and then the aerosol generating matrix 3000 is heated. In addition, the heating method of the heating needle 1420 may also be replaced by other forms, such as heating by a coil using the principle of electromagnetic induction.

[0064] The heating needle 1420 and the needle mounting seat 1430 need to be fixed in the aerosol generating device. In one embodiment, the end of the insertion channel 1320 away from the suction nozzle 1200 is provided with an insertion port, and the end of the needle support 1500 close to the matrix insertion tube 1410 is inserted into the insertion port and forms a seal with the insertion channel 1320. At the same time, the lower end of the needle support 1500 is fixed to the corresponding structure in the aerosol generating device, and the needle support 1500 is fixed to the corresponding structure in the aerosol generating device. Figure 2 , Figure 3 and Figure 5 It is understood that the lower end surface of the needle support 1500 may be provided with a plugging protrusion 1510, and the plugging protrusion 1510 may be plugged and fixed to the circuit board component 1600 at the bottom of the device housing 1100. In some other embodiments, the needle support 1500 may also be fixed to other structures, such as the device housing 1100.

[0065] In a specific embodiment, the needle mounting seat 1430 is embedded in the opening of the needle holder 1500 and is sealed with the needle holder 1500 by a sealing ring, and the needle holder 1500 and the insertion channel 1320 on the nozzle holder 1300 are also sealed by a sealing ring, so as to ensure the stability of the suction airflow.

[0066] In order to facilitate the insertion of the aerosol generating matrix 3000, in one embodiment, the nozzle 1200 is fixed to one end of the matrix insertion tube 1410 provided with an insertion port 1441. In the illustrated embodiment, the nozzle 1200 is made by a two-color injection molding process, and includes an inner layer portion 1210 and an outer layer portion 1220. Of course, in a specific embodiment, the nozzle 1200 can also be a complete homogeneous material piece. There is no limit to the fixing method of the matrix insertion tube 1410 and the nozzle 1200. For example, a snap-fit ​​structure can be used. A specific embodiment can be referred to. Figure 2 , Figure 4 and Figure 6A clamping protrusion 1411 is provided on the outer peripheral surface of the matrix insertion tube 1410, and a clamping claw 1230 is provided on the suction nozzle 1200. A clamping groove or an adapting boss can be provided on the side of the clamping claw 1230 close to the center of the suction nozzle 1200 to achieve clamping. For example, the matrix insertion tube 1410 and the suction nozzle 1200 can be fixed by a threaded connection structure, an adhesive structure, an interference fit structure, etc.

[0067] The nozzle bracket 1300 can be fixed to the upper middle portion of the device housing 1100 to realize the installation of the nozzle 1200 and the matrix insert tube 1410. In a specific embodiment, please refer to Figure 5 The nozzle support 1300 is a sleeve-shaped structure, with a plug-in channel 1320 in the center. The matrix inserting tube 1410 is inserted into the inserting channel 1320. The radial dimension of the nozzle 1200 is larger than the matrix inserting tube 1410, and can be supported at one end of the nozzle support 1300 near the insertion port 1441. When assembling, please refer to Figure 6 The matrix insert tube 1410 can be first fixed on the suction nozzle 1200, and then the suction nozzle 1200 and the matrix insert tube 1410 are inserted into the suction nozzle bracket 1300 as a whole until the suction nozzle 1200 is supported on the top surface of the suction nozzle bracket 1300. The structure is simple, the assembly is convenient, and it is conducive to manufacturing and disassembly and maintenance.

[0068] It is understood that the nozzle bracket 1300 and the device housing 1100 are fixed in any manner, for example, a buckle structure may be used. A specific embodiment can be referred to Figure 5 and Figure 6 A shell connecting buckle 1310 is provided on the outer circumferential surface of the nozzle bracket 1300, which can be snap-fitted and fixed to the mounting hole on the top of the device shell 1100; for example, a threaded connection structure, an adhesive structure, an interference fit structure, etc. can also be used.

[0069] In one embodiment, an anti-dropout structure may be provided between the matrix inserting tube 1410 and / or the suction nozzle 1200 and the insertion channel 1320 on the suction nozzle bracket 1300, and the anti-dropout structure is used to prevent the suction nozzle 1200 and the matrix inserting tube 1410 from escaping from the insertion channel 1320 along the opening direction of the insertion port 1441. In a specific embodiment, please refer to Figure 4 , Figure 5 and Figure 6 The outer circumferential surface of the matrix insert tube 1410 may be provided with an arched protrusion 1412 with an arc-shaped cross section, and an adapted limiting boss 1330 may be provided on the inner wall of the insertion channel 1320 on the suction nozzle bracket 1300, so as to prevent the inserted matrix insert tube 1410 and the suction nozzle 1200 from falling out. It should be noted that the arched protrusion 1412 extends along the circumference of the matrix insert tube 1410, that is, extends around the axis of the matrix insert tube 1410, and its cross section is a cross section perpendicular to its extension direction.

[0070] The upper and lower sides of the limiting boss 1330 can be provided with inclined surfaces, and the upper and lower sides of the arched protrusion 1412 can also be provided with inclined surfaces, so that the change of the insertion depth of the mechanism plug-in tube can be adapted, and when the arched protrusion 1412 and the limiting boss 1330 are matched, a continuous axial force is generated on the matrix plug-in tube 1410, so as to ensure the reliable connection between the matrix plug-in tube 1410 and the suction nozzle 1200 and avoid shaking. Of course, in some other embodiments, the anti-slip structure can also be in other forms, such as a buckle structure to achieve anti-slip, and another example is to rely on the outer peripheral surface of the matrix plug-in tube 1410 and the inner wall of the plug-in channel 1320 to form an interference fit to achieve anti-slip, and another example is to achieve anti-slip through a threaded connection.

[0071] In one embodiment, please refer to Figure 3 , there is a gap between at least a portion of the inner wall of the insertion channel 1320 and the outer peripheral surface of the matrix insertion tube 1410, the gap forms a first air interlayer 1710, and the nozzle bracket 1300 forms a sleeve-shaped member. In addition, a second air interlayer 1720 can be formed between the needle body mounting seat 1430 and the inner wall of the device housing 1100. The size of the first air interlayer 1710 in the radial direction of the heating chamber 1440 can be smaller, while the size of the second air interlayer 1720 in the radial direction of the heating chamber 1440 can be larger, which is conducive to saving the internal space of the device housing 1100 and facilitating the arrangement of other parts. In some other embodiments, the sizes of the air interlayers in the radial direction of the heating chamber 1440 can also be equal, and the size of the outer air interlayer in the radial direction of the heating chamber 1440 can also be smaller.

[0072] In addition, in some other embodiments, at least one sleeve-shaped member may be further provided on the outside of the nozzle bracket 1300, so as to form more interlayers. The number of air interlayers may be between 1 and 5 according to actual needs.

[0073] In order to better prevent the heat of the heating component 1400 from being transferred to the device housing 1100, in one embodiment, the heating chamber 1440 is provided with an air inlet 1450, the air inlet 1450 allows external air flow to enter the heating chamber 1440, and the air inlet 1450 is connected to at least one air interlayer to form air flow in the corresponding air interlayer. In one embodiment, please refer to Figure 3 and Figure 7 An air supply channel may be provided between the nozzle 1200 and the nozzle bracket 1300. For details, please refer to Figure 3 , Figure 6 and Figure 7An air inlet notch 1340 is provided on the top end surface of the front and rear sides of the nozzle holder 1300, and a radial gap is provided between the outer peripheral surface of the nozzle 1200 and the inner wall of the plug-in channel 1320 on the nozzle holder 1300. The air inlet notch 1340 is connected to the radial gap, and the first air interlayer 1710 is also connected to the radial gap. Therefore, the air inlet notch 1340 and the radial gap can be used to form an air supply channel.

[0074] The air supply channel can connect the first air interlayer 1710 with the external atmosphere of the device housing 1100, and a through hole is provided on the sealing structure at the bottom of the substrate insert tube 1410, and the through hole forms an air inlet 1450. The first air interlayer 1710 is connected to the air inlet 1450. When the user inhales through the aerosol generating substrate 3000, the external air can be sucked in along the aerosol generating substrate 3000. Figure 7 The path shown enters the heating chamber 1440 through the first air interlayer 1710 , taking away the heat from the outer wall of the matrix insertion tube 1410 and the nozzle bracket 1300 , which helps to further reduce the transfer of heat to the device housing 1100 .

[0075] In some other embodiments, the air inlet 1450 may also be disposed on the side wall of the heating chamber 1440 , and the air inlet 1450 may also be disposed on both the side wall and the bottom wall of the heating chamber 1440 .

[0076] Considering the high temperature working environment of the aerosol generating device, in one embodiment, the nozzle 1200, the nozzle bracket 1300, the matrix cartridge tube 1410, and the needle bracket 1500 can all be made of plastic materials. For example, the nozzle 1200, the nozzle bracket 1300, the needle bracket 1500, and the device housing 1100 can be made of PC material, while the matrix cartridge tube 1410 and the needle mounting seat 1430 can be made of PEEK material. Of course, each component can also be replaced with other materials according to the corresponding environmental conditions and usage requirements.

[0077] In some other embodiments, the heating component of the aerosol generating device may be replaced with other structures. Figures 8 to 13It can be understood that in one embodiment, the heating component may include a heating tube 2100, and the heating cavity 2120 is formed by the inner cavity of the heating tube 2100; the sleeve-shaped member includes a first sleeve body 2200 and a second sleeve body 2300, the first sleeve body 2200 and the second sleeve body 2300 are sequentially arranged on the radial outer side of the heating tube 2100, and the first sleeve body 2200 and the second sleeve body 2300 are arranged separately; the aerosol generating device also includes a first connecting seat 2400 and a second connecting seat 2500, the first connecting seat 2400 is positioned and arranged at one axial end of the first sleeve body 2200 and the second sleeve body 2300, and the second connecting seat 2500 is positioned and arranged at the other axial end of the first sleeve body 2200 and the second sleeve body 2300. By setting the first connecting seat 2400 and the second connecting seat 2500, the first connecting seat 2400 and the second connecting seat 2500 can be conveniently set on the radial outer side of the heating tube 2100, thereby forming different air interlayers.

[0078] It should be noted that the above-mentioned heating tube 2100 is a tube body that can generate heat. For example, heat generation can be achieved by winding a resistance wire on the insulating tube body, or covering it with a heating film. It can also be achieved by setting an electromagnetic coil on the periphery of the conductive tube body and realizing electromagnetic induction heat generation through the electromagnetic coil. The specific heat generation method of the heating tube 2100 is not limited in the utility model.

[0079] Please refer to Figure 8 , Fig. 9 , Fig.10 and Fig.11 In a specific embodiment, the aerosol generating device includes a nozzle holder 2710 that is snap-fitted to the device housing 2000. The nozzle holder 2710 is annular, and its inner wall is equipped with a silicone pad 2720. The inner side wall of the silicone pad 2720 is provided with snap-fit ​​protrusions arranged along the circumferential direction. The snap-fit ​​protrusions can position the aerosol generating substrate 3000 to be heated, and form a gap between the outer peripheral surface of the aerosol generating substrate 3000 to be heated and the silicone pad 2720 for airflow to pass through.

[0080] In one embodiment, in order to further control the transfer of heat to the device housing 2000 by relying on airflow, the upper end of the heating tube 2100 has an insertion port for inserting a rod-shaped aerosol generating matrix 3000, the first connecting seat 2400 is arranged at the end close to the insertion port, and the second connecting seat 2500 is arranged at the end away from the insertion port; a first air layer 2810 is formed between the heating tube 2100 and the first sleeve 2200, and a second air layer 2820 is formed between the first sleeve 2200 and the second sleeve 2300; an air inlet 2110 for external airflow to enter the heating chamber 2120 is provided on the side of the heating tube 2100 away from the insertion port, and an air supply channel is provided on the second connecting seat 2500, and the air supply channel connects the air inlet 2110 and the second air layer 2820.

[0081] The connection between the air supply channel and the second air layer 2820 may be achieved through different structural forms, one of which is described below with reference to the accompanying drawings.

[0082] Please refer to Figures 8 to 11 The first connection seat 2400 may be a silicone seat, which is arranged below the nozzle support 2710 and the silicone pad 2720 and can be sealed with the lower end surface of the silicone pad 2720, and a evacuation hole for the aerosol generating matrix 3000 to pass through is provided in the middle of the first connection seat 2400. An upper annular rib 2410 is provided radially outward of the first connection seat 2400, and the upper annular rib 2410 can be sealed with the outer peripheral surface of the second housing 2300.

[0083] The second connection seat 2500 may also be a silicone seat, which is fixed to an internal bracket provided in the device housing 2000. A heating tube support seat 2600 may be provided in the second connection seat 2500, and the heating tube 2100 may be supported on the heating tube support seat 2600, and the lower end of the heating tube 2100 is sealed with the heating tube support seat 2600 through a silicone sealing ring. The heating tube support seat 2600 is provided with an air inlet 2110 that passes through from top to bottom, and the air inlet 2110 can be communicated with a gas communication channel provided on the second connection seat 2500. A lower annular rib 2510 is provided on the radial outer side of the second connecting seat 2500, and there is a distance between the inner wall of the lower annular rib 2510 and the outer peripheral surface of the heating tube support seat 2600 to form an annular gap. The second sleeve 2300 and the bottom of the first sleeve 2200 can be inserted into the annular gap, and the outer peripheral surface of the second sleeve 2300 is sealed with the inner wall of the lower annular rib 2510, and the inner wall of the first sleeve 2200 is sealed with the outer peripheral surface of the heating tube support seat 2600.

[0084] An annular space, namely, a first air sandwich 2810, is formed between the first casing 2200 and the heating tube 2100, and an annular space, namely, a second air sandwich 2820, is also formed between the first casing 2200 and the second casing 2300. Fig.10 and Fig.11 In order to better ensure the positioning of the first sleeve 2200 and the second sleeve 2300, a guide rib 2210 is respectively provided on two opposite sides of the bottom of the outer circumference of the first sleeve 2200, and a limiting rib 2220 is respectively provided on two opposite sides of the top of the outer circumference of the first sleeve 2200. Correspondingly, a guide groove 2310 extending in the up-and-down direction is provided on the inner wall of the second sleeve 2300, and a positioning groove 2320 for the limiting rib 2220 to be embedded is provided on the top of the side wall of the second sleeve 2300.

[0085] In order to achieve communication between the second air layer 2820 and the air inlet 2110 at the bottom of the heating tube support seat 2600, a radial connecting channel 2610 is provided on the downwardly protruding annular protrusion on the bottom surface of the heating tube support seat 2600. In one embodiment, the number of the radial connecting channels 2610 is two, and the two radial connecting channels 2610 are respectively arranged on opposite sides of the heating tube support seat 2600.

[0086] When the aerosol generating device is working, external air can enter the heating chamber 2120 through the second air interlayer 2820. In order to allow external air to enter the second air interlayer 2820, in one embodiment, a substrate avoidance port 2420 is provided on the first connecting seat 2400, and the substrate avoidance port 2420 is provided for the aerosol generating substrate 3000 to pass through and forms an axial air inlet channel 2430 with the aerosol generating substrate 3000; the aerosol generating device includes an annular sealing member 2450, and the upper end of the heating tube 2100 is sealed with the annular sealing member 2450 through a silicone sealing ring, and the annular sealing member 2450 is arranged at one end of the first air interlayer 2810 close to the insertion port. Please refer to Fig.12 The bottom surface of the first connection seat 2400 is provided with an air inlet channel 2430 for external air flow to pass through, and the air inlet channel 2430 connects the avoidance port and the second air interlayer 2820. In order to ensure the smooth flow of air, two air inlet channels 2430 are provided, and the two air inlet channels 2430 are respectively arranged on opposite sides of the first connection seat 2400. The inner side surface of the top wall of the first connection seat 2400 is also provided with an air distribution groove 2440 connected with the air inlet channel 2430, and the air distribution groove 2440 is connected with the top of the second air interlayer 2820.

[0087] Please refer to Fig.13 , Fig.13 A cross section of the aerosol generating device is shown, and the cross section is parallel to the axis of the heating chamber 2120 and passes through two air inlet channels 2430 at the same time. When inhaling, the external air can enter the mouthpiece along the outer peripheral surface of the aerosol generating substrate 3000, and then enter the second air interlayer 2820 through the air inlet channel 2430 on the first connecting seat 2400, and then enter the heating chamber 2120 through the radial communication channel 2610 and the air inlet 2110 on the heating tube support seat 2600, thereby achieving heating of the aerosol generating substrate 3000 and achieving an atomization effect.

[0088] It should be noted that the first connection seat 2400 and the second connection seat 2500 can also be replaced by plastic materials, such as PAEK, PPSU, high temperature nylon, PTFE, PVDF, PSU, LCP, FKM, PI, TP, etc. After adopting the plastic material, in order to ensure the sealing effect, a sealing ring can be used to seal with the first sleeve 2200 and the second sleeve 2300. In addition, in some other embodiments, the first sleeve 2200 and the second sleeve 2300 can also be an integral structure, and the annular blocking member 2450 can also be made into an integral structure with the first sleeve 2200.

[0089] exist Figure 8 In the embodiment shown, a third air interlayer 2830 is formed between the second casing 2300 and the device housing 2000. The third air interlayer 2830 is larger in radial direction of the heating chamber 2120 than the other air interlayers, and can achieve a better heat insulation effect. In some other embodiments, at least one sleeve-shaped member can be further provided outside the second casing 2300, so as to form more interlayers. According to actual needs, the number of air interlayers can be between 1 and 5.

[0090] By setting up air interlayers, the air interlayers can isolate the outward conduction of heat. At the same time, at least one air interlayer is connected to the air inlet 2110 to form an airflow in the corresponding air interlayer, which can rely on the airflow to dissipate heat, thereby ensuring the overall thermal insulation effect and reducing the number of air interlayers to avoid the aerosol generating device from being too large in the radial direction of the heating chamber 2120.

[0091] In addition, it should be noted that, in some other embodiments, there may be a gap between the outer side of the aerosol generating substrate 3000 and the side wall of the heating chamber 2120, and the air intake of the heating chamber 2120 may also be achieved through the gap, and in this case, the air intake may be achieved through at least one air interlayer at the same time. In addition, the air intake path may also be independent of the aerosol generating substrate 3000, that is, the air intake is not along the outer peripheral surface of the aerosol generating substrate 3000. For example, a certain air interlayer is connected to the external air through a connecting port or a connecting channel.

[0092] The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, deformations or substitutions can be made based on the idea of ​​the present invention.

Claims

1. An aerosol generating device, characterized in that: include: Device housing; A heating component, wherein a heating cavity is provided in the heating component, and the heating cavity is used to place the aerosol generating substrate to be heated; the heating component is arranged inside the device housing, and there is a gap between the outer side of the heating component and the device housing; and at least one sleeve-like member, wherein the at least one sleeve-like member is sleeved outside the heating component, an air layer is formed between the sleeve-like member and the heating component, and / or an air layer is formed between two adjacent sleeve-like members; The heating chamber is provided with an air inlet for external airflow to enter the heating chamber, and at least one of the air interlayers is connected to the air inlet so that external air can flow into the heating chamber through the air interlayer.

2. The aerosol generating device according to claim 1, characterized in that An air interlayer is formed between the outermost sleeve-shaped member and the inner wall of the device shell, and the size of the air interlayer in the radial direction of the heating cavity is larger than that of other air interlayers.

3. The aerosol generating device according to claim 1 or 2, characterized in that: The heating component includes a matrix insertion tube and a heating needle. The heating chamber is formed by the matrix insertion tube. The matrix insertion tube has an insertion port for inserting the rod-shaped aerosol generating matrix. The heating needle is arranged at the end of the matrix insertion tube opposite to the insertion port.

4. The aerosol generating device according to claim 3, characterized in that It comprises a suction nozzle and a suction nozzle bracket, wherein the suction nozzle is fixed to one end of the matrix insertion tube provided with the insertion port; The suction nozzle holder is fixed on the device housing, and an insertion channel is provided on the suction nozzle holder. The matrix insertion tube is inserted in the insertion channel, and the suction nozzle is supported at one end of the suction nozzle holder close to the insertion port. An anti-slip structure is provided between the matrix insertion tube and / or the suction nozzle and the insertion channel, and the anti-slip structure is used to prevent the suction nozzle and the matrix insertion tube from slipping out of the insertion channel along the opening direction of the insertion port.

5. The aerosol generating device according to claim 4, characterized in that There is a gap between at least a portion of the inner wall of the insertion channel and the outer peripheral surface of the matrix insertion tube, the gap forms one air interlayer, and the nozzle bracket forms one sleeve-shaped member.

6. The aerosol generating device according to claim 4, characterized in that It includes a needle body mounting seat and a needle body bracket, the heating needle is fixed on the needle body mounting seat, the needle body bracket is arranged on the side of the needle body mounting seat away from the matrix insertion tube, the needle body mounting seat is fixed to one end of the needle body bracket close to the matrix insertion tube and forms a seal with the needle body bracket, and the heating needle is inserted into the matrix insertion tube from the outside of the matrix insertion tube.

7. The aerosol generating device according to claim 6, characterized in that An insertion port is provided at one end of the insertion channel away from the suction nozzle, and one end of the needle support close to the matrix insertion tube is inserted into the insertion port and forms a seal with the insertion channel.

8. The aerosol generating device according to claim 1 or 2, characterized in that: The heating component includes a heating tube, and the heating cavity is formed by the inner cavity of the heating tube; the sleeve-shaped member includes a first sleeve body and a second sleeve body, and the first sleeve body and the second sleeve body are sequentially arranged on the radial outside of the heating tube, and the first sleeve body and the second sleeve body are arranged separately; the aerosol generating device also includes a first connecting seat and a second connecting seat, and the first connecting seat is positioned at one axial end of the first sleeve body and the second sleeve body, and the second connecting seat is positioned at the other axial end of the first sleeve body and the second sleeve body.

9. The aerosol generating device according to claim 8, characterized in that The heating tube has an insertion port for inserting the rod-shaped aerosol generating matrix, the first connecting seat is arranged at an end close to the insertion port, and the second connecting seat is arranged at an end away from the insertion port; a first air layer is formed between the heating tube and the first sleeve, and a second air layer is formed between the first sleeve and the second sleeve; an air inlet is provided on the side of the heating tube away from the insertion port for external airflow to enter the heating chamber, and an air supply channel is provided on the second connecting seat, and the air supply channel connects the air inlet and the second air layer.

10. The aerosol generating device according to claim 9, characterized in that The first connecting seat is provided with a substrate avoidance port, the substrate avoidance port is for the aerosol generating substrate to pass through and forms an axial air inlet channel with the aerosol generating substrate; the aerosol generating device comprises an annular sealing member, the annular sealing member is arranged at one end of the first air interlayer close to the insertion port, the first connecting seat is provided with an air inlet channel for external air flow to pass through, the air inlet channel connects the avoidance port and the second air interlayer.

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