WO2024011393A1

WO2024011393A1 - Heating assembly for aerosol generation device, and aerosol generation device

Info

Publication number: WO2024011393A1
Application number: PCT/CN2022/105045
Authority: WO
Inventors: 李思文; 符小松; 唐志强; 魏勇
Original assignee: 深圳华宝协同创新技术研究院有限公司
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2024-01-18
Also published as: CN117279526A

Abstract

A heating assembly (100) for an aerosol generation device (200), and the aerosol generation device (200), which relate to the field of aerosol generation. The heating assembly (100) comprises a longitudinally extending cavity (30), an electric heating element (20), a housing (10), and an air intake flow channel (60), wherein the electric heating element (20) is located at one end of the longitudinally extending cavity (30) and is provided with a plurality of hole channels (21) extending along a longitudinal axis, and the electric heating element (20) is configured such that the air flowing through the hole channels (21) is heated to the temperature no less than 200°C and can thus flow into the longitudinally extending cavity (30); the housing (10) surrounds the outer periphery of the electric heating element (20) in a sleeving manner, and has an air gap between same and the electric heating element (20); and the air intake flow channel (60) is only partially configured in the region of the air gap. The bottom of an aerosol forming substrate (301) is heated by the heating assembly (100), and under the action of the air gap, the heat energy emitted from the electric heating member (20) and the periphery of the longitudinally extending cavity (30) is blocked by the air gap, which achieves collection of the heat energy and temperature compensation for the aerosol forming substrate (301), thereby effectively utilizing the waste heat of the electric heating member (20).

Description

A heating component for an aerosol generating device and an aerosol generating device

Technical field

The present application relates to the field of aerosol generation technology, and in particular, to a heating component and an aerosol generation device for an aerosol generation device.

Background technique

Currently, with the popularity of electronic products in cigarette technology, more and more smokers are beginning to use electrically operated aerosol generation systems. Among them, there is an aerosol generation system for non-burning tobacco products. Its main principle is to bake low-temperature non-burning smoke through a heating element, and use the baking to generate aerosol gas, which is then inhaled by the smoker. For existing heat-not-burn aerosol generation systems, the heating method of the aerosol generation system is usually tubular peripheral heating or central embedded heating. Center embedded heating means that the heating piece is inserted into the aerosol-generating matrix, which will change the porosity of the aerosol-generating matrix section and increase the suction resistance. Moreover, after smoking is completed, the remaining aerosol-generating matrix will make it difficult to clean the heating plate. trouble. Tubular peripheral heating means that the heating tube surrounds the outside of the aerosol-generating matrix. In particular, when the tubular peripheral heating element is heated, it performs three-dimensional circumferential heating around the heating element. It is easy to over-bake the wrapping paper that wraps the aerosol-generating matrix, and it is easy to not fully heat the central part of the aerosol-generating matrix. This causes waste and is not conducive to sufficient heating of the aerosol-generating substrate.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and therefore do not It should be regarded as a limitation of the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 shows a schematic perspective view of a heating assembly for an aerosol generating device in some embodiments of the present application;

Figure 2 shows a schematic structural diagram of the A-A cross-section in Figure 1;

Figure 3 shows a schematic three-dimensional structural diagram of a longitudinally extending cavity in one embodiment of the present application;

Figure 4 shows a schematic structural diagram of a longitudinally extending cavity in one embodiment of the present application;

Figure 5 shows a schematic structural diagram of the B-B cross-section in Figure 4;

Figure 6 shows a schematic diagram of the aerosol-generating substrate located within the heating component in one embodiment of the present application;

Figure 7 shows a partial schematic diagram of a metal support tube enclosing an electric heating element extending from a longitudinally extending cavity in one embodiment of the present application;

Figure 8 shows a schematic three-dimensional structural diagram of the base in one embodiment of the present application;

Figure 9 shows a perspective view of an aerosol generating device in one embodiment of the present application;

Figure 10 shows a schematic structural diagram of the C-C section in Figure 9;

Figure 11 shows an enlarged structural schematic diagram of part D in Figure 10;

Figure 12 shows an exploded schematic diagram of an aerosol generating device in one embodiment of the present application;

Figure 13 shows a three-dimensional schematic view of the housing in some embodiments of the present application;

Figure 14 shows a schematic cross-sectional view of the housing and the thermal insulation member in some embodiments of the present application;

Figure 15 shows a schematic cross-sectional structural diagram of another embodiment of the present application;

Figure 16 is a schematic cross-sectional view of the explosion structure of the present application in Figure 15.

Description of main component symbols:

100-heating component; 10-shell; 11-shell wall; 111-air inlet; 12-base; 121-connection hole; 122-bracket; 123-air channel; 124-circuit board; 13-convex prism; 14 -Opening defining part; 15-extension tube; 20-electric heating element; 21-hole channel; 22-heating core; 30-longitudinal extension cavity; 31-heat conduction pipe fittings; 311-annular tube wall; 312-positioning part; 313- Cavity area; 32-rigid tube body; 321-annular protrusion; 33-metal support tube; 331-hollow area; 40-insulation parts; 41-internal cavity; 42-casing; 50-sealing ring; 60- Inlet flow channel; 200-aerosol generation device; 300-aerosol generation product; 301-aerosol formation matrix.

Detailed ways

The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as limiting the present application.

In the description of this application, it needs to be understood that the terms "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "axial", "circumferential" The indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present application and simplifying the description. They are not intended to indicate or imply that the device or element referred to must have a specific orientation or in a specific manner. orientation construction and operation, and therefore should not be construed as limitations on this application.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of this application, "plurality" means two or more than two, unless otherwise explicitly and specifically limited.

In this application, unless otherwise clearly stated and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated; 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 an internal connection between two elements or an interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

In this application, unless otherwise expressly stated and limited, a first feature being "on" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. touch. "Below", "below" and "beneath" the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.

As shown in Figures 1, 6 and 9, embodiments of the present application provide a heating assembly 100 for an aerosol generation device 200, which can be used on the aerosol generation device 200 to generate heat-not-burn tobacco such as aerosols. Article 300 is heated so as to be smoked by the user. In this application, the aerosol-generating device 200 may be one that interacts with the aerosol-forming matrix 301 of the aerosol-generating article 300 to generate an aerosol that can be inhaled directly into the user's oral cavity through the user's mouth. Aerosol generating device 200 involves interacting with an aerosol-forming substrate to generate an aerosol. The aerosol-forming substrate may be a component part of the aerosol-generating article. The aerosol-generating device may include one or more components for supplying energy from a power source to the aerosol-forming substrate to generate an aerosol. The aerosol-forming matrix 301 is a matrix capable of releasing volatile compounds capable of forming aerosols. In some embodiments, the aerosol-forming matrix 301 may be formed from or may include processed tobacco, such as homogeneous tobacco, cast leaf tobacco, or plant material that does not include tobacco components.

Referring to Figures 2 and 10 together, the heating assembly 100 includes a longitudinally extending cavity 30, an electric heating element 20, a housing 10 and an air inlet channel. The longitudinally extending cavity 30 is adapted to house an aerosol-generating article 300 including an aerosol-forming matrix 301 , has a longitudinal axis H and includes walls forming at least part of the longitudinally extending cavity 30 . The wall is a wall that is spliced by one or more elements to form the longitudinally extending cavity 30 . The electric heating element 20 is located at one end of the longitudinally extending cavity 30 and has a plurality of holes 21 extending in the direction of the longitudinal axis H. The electric heating element 20 is configured to heat the gas flowing through the holes 21 Heating is performed to a temperature of not less than 200° C. so that it can flow into the longitudinally extending cavity 30 for heating the aerosol-forming matrix of the aerosol-generating product 300 to release aerosol gas for the user to inhale.

As shown in FIG. 15 , in this application, the housing 10 is sleeved around the outer peripheral side of the electric heating element 20 , and an air gap D3 is provided between the housing 10 and the electric heating element 20 . The channel 60 is adjacent to the inner wall of the housing 10 and is only partially configured in the area of the air gap D3.

Embodiments of the present application provide a heating assembly 100 for an aerosol generating device. The electric heating element 20 is electrically connected to the power supply of the aerosol generating device through a connecting electrode, so that the electric heating element 20 is heated, thereby causing the electric heating element 20 to be located in a longitudinally extending cavity. The aerosol-forming matrix such as non-burning tobacco products is heated within 30 seconds. By locating the electric heating element 20 at one end of the longitudinally extending cavity 30 and having a plurality of holes 21 extending along the direction of the longitudinal axis, the electric heating element 20 is configured to heat the gas flowing through the holes 21 to a temperature not lower than 200° C. so that it can flow into the longitudinally extending cavity 30 and enter the aerosol-generating article 300 from the bottom of the aerosol-forming substrate 301 . At the same time, due to the air gap D3, the heat energy emitted by the electric heating element 20 and the longitudinally extending cavity 30 is blocked by the air gap, thereby realizing the collection of thermal energy, which plays a role in storing and isolating heat, and has a negative impact on aerosols. The forming matrix is temperature compensated, effectively utilizing the waste heat of the electric heating element 20 and improving the thermal efficiency of the heating component.

It should be noted that in this embodiment, the electric heating element 20 can be a porous channel 21 heating element, and the porous channel 21 heating element is a heating pattern made of a ceramic piece containing zirconia and a precious metal heating slurry. The pattern materials include but are not limited to silver, tungsten, and other suitable printed circuit materials. The printing thickness of the heating pattern is 0.005-0.05mm. The material of the connecting electrode includes but is not limited to copper, silver, and nickel, and its diameter is 0.1 to 0.3 mm. In addition, the porous channel 21 heating element in this embodiment can also be made of metal material and be electrically connected to a power source to generate resistive heating, or to generate eddy current induction heating in a periodically alternating magnetic field environment.

As shown in Figures 3 to 5, in some embodiments, the heating component further includes a rigid tube 32. The rigid tube 32 is made of metal or high-temperature resistant plastic material such as polyimide or polyether. It is made of ether ketone (PEEK), etc., and its rigid strength is significantly greater than the overall strength of the aerosol-generating product 300 . The rigid tube body 32 abuts the electric heating element 20 along the direction of the longitudinal axis. The rigid tube body 32 is at least a part of the wall of the longitudinally extending cavity 30 to improve the overall structural strength.

It should be noted that in this embodiment, the rigid pipe body 32 is made of metal or high-temperature resistant plastic material such as polyimide, polyetheretherketone (PEEK), etc., and its rigidity strength is significantly greater than that of aerosol generation. The overall strength of the product is 300. The heat transfer efficiency of the rigid pipe body 32 made of plastic is low, which ensures that the aerosol-forming matrix of tobacco products is not burned in the rigid pipe body 32 and the temperature exceeds 400°C.

As shown in FIGS. 3 to 5 , in some embodiments, the heating assembly further includes a metal support tube 33 extending along the longitudinal axis. The metal support tube 33 is sleeved on the electric heating element 20 and the outer peripheral side of the rigid tube body 32, so as to reduce the speed at which the heat emitted from the electric heating element 20 is transferred to the housing 10, thereby improving the insulation and effect.

As shown in Figures 1 and 2, in some embodiments, the heating assembly further includes a heat insulating member 40 installed between the housing 10 and the electric heating element 20, and the heat insulating member 40 is adjacent to the housing. The inner wall of 10 and the housing 10 form at least a part of the air inlet flow channel 60 . In this way, under the action of the heat insulator 40, the heat energy emitted by the electric heating element 20 and the circumferential side of the longitudinally extending cavity 30 is blocked by the heat insulator 40, thereby realizing the collection of heat energy and further performing temperature compensation on the aerosol-generating substrate.

As shown in FIGS. 1 and 2 , in some embodiments, the thermal insulation member 40 is configured as a metal sleeve having an internal cavity 41 , and the internal cavity 41 is evacuated to a position farther than the outside of the sleeve 42 . Low pressure. The internal cavity 41 is a sealed cavity. With this design, the internal cavity 41 can be designed to be close to a vacuum state to avoid rapid loss of heat. Optionally, the sleeve can be made of a metal material in one piece.

Of course, in other embodiments, the internal cavity 41 is filled with inert gas; or the internal cavity 41 contains liquid. If the interior of the internal cavity 41 is filled with liquid, the liquid can slow down the heat dissipation from the insulation member 40 to the outside. The internal cavity 41 may also be filled with inert gas.

Optionally, the thermal insulation member 40 is a sleeve made of thermal insulation material such as ceramic material. The thermal insulation member 40 may also be other components capable of absorbing and transferring heat.

Optionally, the insulation 40 is a vacuum tube. Due to the special characteristics of the vacuum tube, the thermal conductivity of the cavity in the middle is very low, and a large amount of heat will be conducted through the stainless steel material, so that the inner and outer walls of the vacuum tube will contain heat. Of course, such as sleeves made of phase change materials or thermal insulation materials.

Referring to Figures 15 and 16, this embodiment is different from other implementations in that the insulation member 40 is a sleeve made of metal material such as 304# stainless steel. The sleeve includes a cylinder wall and a sleeve located at both ends. The wall derives an extending flange flange which bears against the housing.

Furthermore, the heat insulating member 40 is located on the outer peripheral side of the metal support tube 33 , and there is a first gap D1 between the heat insulating member 40 and the electric heating member 20 . In this way, the heat emitted by the electric heating element 20 is first transferred through the gas in the first gap D1 to avoid direct contact with the electric heating element 20 for heat transfer.

Because when the electric heating element 20 heats the aerosol-forming matrix of the aerosol-generating article 300, the heat will be transferred to the tube wall of the longitudinally extending cavity 30, causing excessive heat accumulation and causing the temperature to rise, causing the longitudinally extending cavity 30 to The packaging cigarette paper of the inner aerosol-forming matrix 301 is easily baked and discolored to produce odor, which reduces the taste of the smoker when smoking. As shown in FIGS. 3 to 5 , in order to prevent the cigarette paper of the aerosol-forming matrix 301 in the longitudinally extending cavity 30 from being easily baked and discolored to produce odor, further, the metal support tube 33 is provided with a plurality of hollow areas 331 . The hollow area 331 at least partially overlaps the outer peripheral surface of the electric heating element 20 .

It should be noted that the term overlap in the embodiment means that when the inner diameter of the metal support tube 33 is greater than or equal to the outer diameter of the longitudinally extending cavity 30, the hollow area 331 is located on the outer peripheral surface of the electric heating element 20, from the cylindrical shape In the front projection direction of the electric heating element 20 , the hollow area 331 is stacked on the outer surface of the electric heating element 20 . In this embodiment, the hollow area 331 is not limited to being at least partially laminated on the outer peripheral surface of the longitudinally extending cavity 30 .

In this embodiment, at least part of the hollow area 331 is overlapped with the outer circumferential surface of the electric heating element 20 so that the heat emitted by the electric heating element 20 is transmitted to the outside of the metal support tube 33 through the air in the hollow area 331, thereby avoiding the risk of electric heating. The heating element 20 directly conducts heat to the longitudinally extending cavity 30 , thus blocking part of the heat from being directly transferred to the longitudinally extending cavity 30 , thus reducing the temperature in the longitudinally extending cavity 30 , thereby avoiding the need for the longitudinally extending cavity 30 The aerosol-forming base material of the packaging cigarette paper produces odor due to high-temperature baking, and also avoids the choking sensation caused by the smell of baking paper when smoking, improves the smoking taste of smokers, and ensures the consistency of the smoking experience.

Further, there is a second gap D2 between the thermal insulation member 40 and the metal support tube 33 . In this way, the heat dissipated from the electric heating element 20 passes through a gas barrier again, which reduces the heat transfer efficiency.

Furthermore, if the metal support tube 33 has a plurality of uniformly distributed hollow areas 331, then the spacing of the second gaps D2 in the direction perpendicular to the longitudinal axis is smaller than the thickness of the first gaps D1. In this way, the heat dissipated from the electric heating element 20 first passes through the gas barrier in the second gap, and then passes through a gas barrier with a thickness difference between the first gap D1 and the second gap D2, which reduces the heat transfer efficiency.

In some embodiments, the rigid tube body 32 includes a partial wall connected to the electric heating element 20 to form the longitudinally extending cavity 30 , and extends from the wall in a direction away from the electric heating element 20 . There is an annular protrusion 321 , and the annular protrusion 321 is nested and connected by the thermal insulation member 40 . This facilitates the installation of the heat insulating component 40 and at the same time achieves a first gap D1 between the heat insulating component 40 and the electric heating component 20 .

As shown in FIG. 4 , further, a sealing ring 50 is supported between the annular protrusion 321 and the thermal insulation member 40 . Specifically, an annular groove can be opened on the annular protrusion 321, and a sealing ring 50 can be placed in the annular groove, that is, the sealing ring 50 can be provided between the heat insulating member 40 and the annular protrusion 321 to improve the sealing performance.

As shown in Figures 2, 6, 10 and 12, in some embodiments, optionally, the housing 10 includes a housing wall 11 and a base 12 matching the housing wall 11. The housing wall 11 It includes an opening defining portion 14 at the opposite end and a side wall extending from the opening defining portion 14 and connected to the base 12. The opening defining portion 14 is a part of the wall of the longitudinally extending cavity 30. A complete housing 10 is formed.

Specifically, the base 12 is provided with a bracket 122 that supports the electric heating element 20 , so that the electric heating element 20 forms a certain distance from the surface of the base 12 without contact, so that the base 12 and the electric heating element 20 are not in contact. An air channel 123 is provided therebetween, and the air channel 123 communicates with the air inlet flow channel 60 and the plurality of holes 21 of the electric heating element 20 . As shown in FIG. 13 , optionally, the housing wall 11 is provided with a plurality of air inlet holes 111 that communicate with external air and the air inlet flow channel 60 .

In this embodiment, the residual heat generated by the electric heating element 20 is conducted from the hollow area 331 to the air inlet flow channel 60 , so that high-temperature gas is formed in the air inlet flow channel 60 and remains in the air inlet flow channel 60 . In this way, when the smoker inhales the sol-generating product 300, the external normal-temperature gas enters the air inlet flow channel 60 from the air inlet hole 111, displacing the high-temperature gas in the air inlet flow channel 60. Under the action of the suction air flow, The high-temperature gas enters the air channel 123 between the base 12 and the electric heating element 20 from the air inlet flow channel 60, and then transfers heat to the electric heating element 20, thereby improving the heating efficiency of the electric heating element 20 and effectively utilizing the electricity. The waste heat of the heating element 20. In this way, when continuous smoking is performed during use, the problem of poor taste caused by insufficient heat of the electric heating element 20 can be avoided. In addition, when the outside normal temperature gas replaces the high-temperature gas in the air inlet flow channel 60, if the cold air entering from the air inlet hole 111 takes away the heat of the housing 10 through the air flow channel, the temperature of the housing 10 can be cooled and dissipated. , while achieving a heat dissipation effect.

As shown in Figure 14, optionally, the side wall of the housing 10 is provided with a plurality of convex prisms 13, and the heat insulating member 40 forms an air inlet flow channel 60 against the convex prisms 13 and the shell wall 11, The air inlet flow channel 60 is connected to the air inlet hole 111 .

In this embodiment, a plurality of convex prisms 13 are supported on the outer wall of the thermal insulation member 40 , and each adjacent two plurality of convex prisms 13 and the outer wall of the thermal insulation member 40 define an air inlet flow channel 60 , so that an air inlet flow channel 60 can be formed along the thermal insulation member 40 . A plurality of air inlet flow channels 60 are formed in the circumferential direction of 40 to facilitate the circulation of gas and improve the heat exchange efficiency. In other embodiments, the thermal insulation component 40 is a sleeve, and the flange flange of the sleeve abuts against the convex prism 13 so that a gap is formed between the thermal insulation component 40 and the side wall of the housing 10 , and this gap is the air inlet flow channel. a part of. Of course, in other embodiments, the air inlet flow channel 60 may also be a spiral groove opened in the circumferential direction of the inner wall of the housing 10 , and the air inlet flow channel 60 may also be a spiral groove opened in the circumferential direction of the outer wall of the insulation member 40 . Groove is not limited to this.

As shown in FIG. 13 , in the above embodiment, optionally, the plurality of air inlet holes 111 are installed in the opening defining part 14 .

As shown in FIGS. 11 and 13 , in the above embodiment, further, the opening defining portion 14 further includes an extension tube 15 in a direction away from the electric heating element 20 , and the extension tube 15 is configured to only accommodate the aerosol. A portion of the wall of the longitudinally extending cavity 30 of the article 300 is created. to facilitate insertion of the aerosol-generating article 300.

Optionally, one end of the rigid tube body 32 abuts the opening defining portion 14 , and the inner diameter of the opening defining portion 14 is greater than or equal to the inner diameter of the rigid tube body 32 .

As shown in FIGS. 3 to 5 , in some embodiments, optionally, the electric heating element 20 further includes a heat conduction pipe 31 coaxial with the longitudinally extending cavity 30 , and the heat conduction pipe 31 includes an annular The tube wall 311 and the positioning portion 312 extend from the annular tube wall 311 in the central direction. The annular tube wall 311 houses a heating core 22 having the plurality of holes 21 . The aerosol-forming substrate 301 in the longitudinally extending cavity 30 is heated by the heating core 22 .

Furthermore, the heating core 22 is supported and fixed by one of the positioning parts 312, and has a gap D4 between the heating core 22 and the annular tube wall 311. In this way, a gas barrier is formed between the heating core 22 and the annular tube wall 311 through the gap D4, which can avoid rapid heat loss caused by direct contact between the heating core 22 and the annular tube wall 311.

In the above embodiment, optionally, the positioning portion 312 divides the heat conduction pipe 31 into two cavity areas 313 , and one cavity area 313 accommodates the electric heating element 20 , which facilitates the installation of the electric heating element 20 . Another cavity area 313 contains part of the aerosol-forming matrix. Further, the inner diameter of the cavity region 313 that accommodates a portion of the aerosol-generating article 300 of the aerosol-forming matrix 301 is greater than or equal to the diameter of the aerosol-generating article 300 . to facilitate placement of the aerosol-generating article 300.

As shown in FIG. 7 , in some embodiments, the metal support tube 33 also covers the portion d of the electric heating element 20 extending from the longitudinally extending cavity 30 , and the hollow area 331 is at least partially connected to the portion d. The gap between the electric heating element 20 and the metal support tube 33 penetrates each other. In this way, the heat in the gap between the electric heating element 20 and the metal support tube 33 can be easily dissipated from the hollow area 331 .

As shown in FIG. 8 , in any of the above embodiments, the base 12 is provided with a connection hole 121 , and the connection electrode of the electric heating element 20 is passed through the connection hole 121 to be electrically connected to the circuit board 124 . In this way, it is convenient for the connection electrodes of the electric heating element 20 and the circuit board 124 to be electrically connected.

As shown in FIGS. 9 to 12 , embodiments of the present application also provide an aerosol generating device 200 having the heating assembly 100 for the aerosol generating device 200 described in the above embodiment. Therefore, the heating assembly 100 used in the aerosol generating device 200 in the first embodiment has all the beneficial effects, and will not be described again here.

In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification unless they are inconsistent with each other.

Although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are illustrative and cannot be understood as limitations of the present application. Those of ordinary skill in the art can make modifications to the above-mentioned embodiments within the scope of the present application. The embodiments are subject to changes, modifications, substitutions and variations.

Claims

A heating assembly for an aerosol generating device, comprising:

a longitudinally extending cavity for receiving an aerosol-generating article including an aerosol-forming matrix, the longitudinally extending cavity having a longitudinal axis and including a wall forming at least a portion of the longitudinally extending cavity; Characteristically, the heating component further includes:

An electric heating element, the electric heating element is located at one end of the longitudinally extending cavity and has a plurality of holes extending in the direction of the longitudinal axis. The electric heating element is configured to heat the gas flowing through the holes. To a temperature of not less than 200°C so that it can flow into the longitudinally extending cavity;

A shell, which is sleeved around the outer peripheral side of the electric heating element, and has an air gap between it and the electric heating element;

An air inlet runner is adjacent to the inner wall of the housing and is only partially configured in the area of the air gap.
The heating component for an aerosol generating device according to claim 1, wherein the heating component further includes a rigid tube body connected to the electric heating element along the direction of the longitudinal axis. , the rigid tube is at least a portion of the wall of the longitudinally extending cavity.
The heating assembly for an aerosol generating device according to claim 2, wherein the heating assembly further includes a metal support tube extending along the longitudinal axis, and the metal support tube is sleeved on the The electric heating element and the outer peripheral side of the rigid tube body.
The heating assembly for an aerosol generating device according to claim 3, wherein the heating assembly further includes a thermal insulation member installed between the housing and the electric heating element, and the thermal insulation member A member is adjacent to an inner wall of the housing and forms at least a portion of the air inlet flow path with the housing.
The heating assembly for an aerosol generating device according to claim 4, wherein the thermal insulation member is configured as a sleeve having an internal cavity, and the internal cavity is evacuated to a larger area than the outside of the sleeve. Lower pressure.
The heating assembly for an aerosol generating device according to claim 4, wherein the heat insulating member is located on the outer peripheral side of the metal support tube, and there is a first heat insulating member between the heat insulating member and the electric heating member. gap.
The heating assembly for an aerosol generating device according to claim 4, wherein the metal support tube is provided with a plurality of hollow areas.
The heating component for an aerosol generating device according to claim 7, wherein the hollow area at least partially overlaps the outer peripheral surface of the electric heating element.
The heating assembly for an aerosol generating device according to claim 6, wherein there is a second gap between the thermal insulation member and the metal support tube.
The heating assembly for an aerosol generating device according to claim 9, wherein the spacing of the second gaps in a direction perpendicular to the longitudinal axis is smaller than the thickness of the first gaps.
The heating assembly for an aerosol generating device according to claim 4, wherein the rigid tube body includes at least part of the wall connected with the electric heating element to form the longitudinally extending cavity, from the An annular protrusion is provided on the wall in a direction extending away from the electric heating element, and the annular protrusion is nested and connected by the heat insulating element.
The heating assembly for an aerosol generating device according to claim 4, wherein the housing includes a housing wall and a base matching the housing wall, and the housing wall includes an opening relative to the end. a defining portion and a side wall connected to the base extending from an opening defining portion that is part of the wall of the longitudinally extending cavity.
The heating assembly for an aerosol generating device according to claim 12, wherein the side wall of the housing is provided with a plurality of convex prisms, and the heat insulating member is against the convex prisms and the The housing wall forms at least part of the air intake runner.
The heating assembly for an aerosol generating device according to claim 12, wherein the opening defining portion further includes an extension tube in a direction away from the electric heating element, and the extension tube is configured to only accommodate the gas. The sol forms a portion of the wall of the longitudinally extending cavity of the article.
The heating assembly for an aerosol generating device according to claim 12, wherein one end of the rigid tube is in contact with the opening defining portion, and the inner diameter of the opening defining portion is greater than or equal to the The inside diameter of a rigid pipe body.
The heating assembly for an aerosol generating device according to claim 12, wherein the base is provided with a bracket to support the electric heating element, and an air channel is provided between the base and the electric heating element. , the air channel communicates with the air inlet flow channel and multiple holes of the electric heating element.
The heating assembly for an aerosol generating device according to any one of claims 12 to 16, wherein the housing wall is provided with a plurality of air inlet holes connecting external air and the air inlet flow channel.
The heating assembly for an aerosol generating device according to claim 17, wherein the plurality of air inlet holes are arranged in the opening defining portion.
The heating assembly for an aerosol generating device according to claim 1, wherein the electric heating element further includes a heat conduction pipe coaxial with the longitudinally extending cavity, and the heat conduction pipe includes an annular pipe wall. , a positioning portion extending from the annular tube wall in the central direction, and a heating core having the plurality of holes is accommodated in the annular tube wall.
The heating assembly for an aerosol generating device according to claim 19, wherein the heating core is supported and fixed by one of the positioning parts, and has a gap between the heating core and the annular tube wall.
The heating assembly for an aerosol generating device according to claim 20, wherein the positioning part divides the heat conduction pipe into two cavity areas, one cavity area accommodates the electric heating element, and the other cavity area accommodates the electric heating element. A region contains a portion of the aerosol-generating article of the aerosol-forming matrix.
An aerosol generating device, characterized by comprising the heating component for the aerosol generating device according to any one of claims 1 to 21.