WO2023246370A1

WO2023246370A1 - Aerosol generating device and heating assembly thereof

Info

Publication number: WO2023246370A1
Application number: PCT/CN2023/094035
Authority: WO
Inventors: 文治华; 张大志
Original assignee: 深圳麦克韦尔科技有限公司
Priority date: 2022-06-20
Filing date: 2023-05-12
Publication date: 2023-12-28
Also published as: EP4295713A1; CN115067565A; KR20230174157A; JP2024000501A

Abstract

An aerosol generating device (100) and a heating assembly (10) thereof. The heating assembly (10) is internally provided with a heating chamber (120) for accommodating an aerosol generating substrate (70), the heating chamber (120) has a cross-sectional profile comprising at least one concave contour (121) towards the central axis of the heating chamber (120), and the at least one concave contour (121) is configured to press the aerosol generating substrate (70). When the aerosol generating substrate (70) is inserted into the heating assembly (10), the aerosol generating substrate is pressed by a cavity wall surface where the concave contour (121) is located, air is squeezed out of the aerosol generating substrate (70), the heat conduction efficiency is improved, and moreover, a heat conduction distance from an outer surface of the aerosol generating substrate (70) to the center of the aerosol generating substrate is reduced, such that the problems of a large surface-center temperature difference, a low heat conduction efficiency and long preheating time of the aerosol generating substrate (70) are ameliorated.

Description

Aerosol generating device and its heating component

Technical field

The present invention relates to the field of atomization, and more specifically, to an aerosol generating device and a heating component thereof.

Background technique

The heat-not-burn atomization device is an aerosol-generating device that generates aerosol by heating the aerosol-generating substrate in a low-temperature heat-not-burn method. At present, heat-not-burn atomization devices usually use tubular peripheral heating or central embedded heating. Among them, tubular peripheral heating refers to the heating component surrounding the aerosol-generating matrix. In existing aerosol-generating devices that use tubular peripheral heating, the heating component is usually designed in the shape of a hollow circular tube. After the aerosol-generating matrix is inserted, the circle where the cross-sectional contour line of the aerosol-generating matrix is located coincides with the inner wall of the heating component. When the contacts are coincident or tangential, the aerosol-generating substrate is heated by the heating component to generate aerosol. This structure has at least the following shortcomings: the heat conduction path from the heating component to the center of the aerosol-generating matrix is long and the thermal efficiency is low, resulting in a large temperature difference between the surface and center of the aerosol-generating matrix. In addition, the air content inside the aerosol-generating matrix is high. It will also lead to low heat conduction efficiency, long preheating time, and slow smoke generation.

Contents of the invention

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

The technical solution adopted by the present invention to solve the technical problem is to construct a heating assembly, a heating cavity for accommodating an aerosol-generating substrate is formed in the heating assembly, and the cross-sectional profile of the heating cavity includes a section toward the heating cavity. at least one concave profile of the central axis, the at least one concave profile being configured for squeezing the aerosol generating matrix.

In some embodiments, the cross-sectional profile of the heating chamber further includes at least one connection profile connected to the at least one concave profile, the at least one connection profile being farthest from the central axis of the heating chamber. The distance is greater than the radius of the aerosol generating matrix.

In some embodiments, the at least one concave profile and the at least one connection profile are both smooth curves, and the at least one concave profile is smoothly connected to the at least one connection profile.

In some embodiments, the at least one concave profile includes a plurality of concave profiles evenly spaced along the circumference of the heating chamber; the at least one connection profile includes a plurality of connection profiles , the plurality of connection profiles are evenly spaced along the circumferential direction of the heating cavity.

In some embodiments, the at least one concave profile includes two concave profiles, the two concave profiles are arranged oppositely in the circumferential direction of the heating chamber; the at least one connection profile includes two connection profiles, The two connecting contours are arranged oppositely in the circumferential direction of the heating cavity; the two concave contours and the two connecting contours are both arcuate contours.

In some embodiments, the two concave contours have a radius of curvature greater than the radius of curvature of the two connecting contours.

In some embodiments, at least one airflow channel is defined between the at least one connection profile and an outer surface of the aerosol-generating substrate in a state in which the aerosol-generating substrate is accommodated in the heating chamber.

In some embodiments, the heating component includes a heating tube and a heating layer disposed on the heating tube; the heating tube is tubular, and the inner wall of the heating tube defines the heating cavity.

In some embodiments, the heating layer includes a heating portion corresponding to the at least one concave profile and a conductive portion corresponding to the at least one connection profile, and the resistivity of the heating portion is greater than that of the conductive portion. resistivity.

In some embodiments, the heat-generating layer includes at least two parallel heating tracks, and at least two of the heating tracks are distributed along the axial direction and/or circumferential direction of the heating tube.

In some embodiments, the heating component further includes an infrared layer disposed on the heating tube.

In some embodiments, the heating component further includes a heat uniformity layer disposed on the heating tube.

In some embodiments, the infrared layer is provided on the inside of the heating tube, the heat uniformity layer is provided on the outside of the heating tube, and the heating layer is provided on the outside of the heat uniformity layer;

The heating component further includes a dielectric layer disposed between the heat equalizing layer and the heat generating layer.

In some embodiments, an introduction chamber is also formed in the heating component, and the introduction chamber is connected with the heating chamber for introducing the aerosol-generating matrix.

In some embodiments, the introduction chamber has a first end remote from the heating chamber and a second end close to the heating chamber, and the cross-sectional profile of the first end of the introduction chamber is consistent with that of the introduction chamber. The closest distance between the central axes is greater than or equal to the radius of the aerosol-generating matrix.

In some embodiments, the cross-sectional area of the introduction cavity at the first end is greater than the cross-sectional area at the second end.

In some embodiments, the cross-sectional profile of the introduction cavity is a gradual transition from the first end to the second end.

In some embodiments, the heating assembly further includes a support wall disposed at one end of the heating chamber for supporting the aerosol-generating substrate.

In some embodiments, the support wall includes an end wall and at least one boss protruding from the end wall toward the heating chamber.

The present invention also provides an aerosol generating device, including the heating component described in any one of the above.

Implementing the present invention has at least the following beneficial effects: when the aerosol-generating matrix is inserted into the heating component, it will be squeezed by the cavity wall where the concave contour is located, and the air inside the aerosol-generating matrix is extruded and discharged, thereby improving the thermal conductivity efficiency. At the same time, the air The heat conduction distance from the outer surface of the aerosol-generating matrix to its center is reduced, thereby improving the problems of large surface-to-core temperature difference, low heat conduction efficiency, and long preheating time of the aerosol-generating matrix.

Description of the drawings

The present invention will be further described below in conjunction with the accompanying drawings and examples. In the accompanying drawings:

Figure 1 is a schematic three-dimensional structural diagram of an aerosol-generating device inserted into an aerosol-generating matrix in some embodiments of the present invention;

Figure 2 is a schematic longitudinal cross-sectional view of the aerosol generating device shown in Figure 1 when an aerosol generating matrix is inserted;

Figure 3 is a schematic three-dimensional structural diagram of the heating component in Figure 2;

Figure 4 is a top view of the heating assembly shown in Figure 3;

Figure 5 is a schematic diagram of the A-A longitudinal section of the heating assembly shown in Figure 3;

Figure 6 is a schematic diagram of the B-B transverse cross-section when the heating assembly shown in Figure 3 is inserted into an aerosol-generating matrix;

Figure 7 is a schematic longitudinal cross-section of the heating assembly in the first alternative of the present invention;

Figure 8 is a side view of a heating assembly in a second alternative to the invention.

Implementation

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 will now be described in detail with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, the present invention can be implemented in many other ways different from those described here. Those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axis" The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientation or positional relationships shown in the drawings or are the orientations or positional relationships commonly placed when the product of the present invention is used, and are only for the convenience of describing the present invention. The invention and simplified description are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore are not to be construed as limitations of the invention.

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 at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

In the present invention, 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 into one; 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 interactive relationship between two elements, unless otherwise specified restrictions. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present invention, 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 intermediate medium. touch. Furthermore, the terms "above", "above" and "above" the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. "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.

It should be noted that when an element is referred to as being "mounted" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may also be intervening elements present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation manner.

Figures 1-2 illustrate an aerosol generating device 100 in some embodiments of the present invention. The aerosol generating device 100 can bake and heat the aerosol generating matrix 70 contained therein at a low temperature after being powered on, so as to prevent burning. The effective substances in the aerosol generating matrix 70 are released under the state of the aerosol generating matrix 70 to form an aerosol. The aerosol generating device 100 can be generally in the shape of a square column. It can be understood that in other embodiments, the aerosol generating device 100 is not limited to a square columnar shape, and may also be in a cylindrical shape, an elliptical columnar shape, or other shapes.

The aerosol generating substrate 70 may be in a cylindrical shape and includes an atomizing substrate segment 71 . The atomized substrate segment 71 may include one or more solid smoking substrates in the form of filaments, sheets, granules, powders, pastes, etc., and the solid smoking substrates can release the contents thereof after being heated. Aerosol extract. The diameter of the aerosol-generating matrix 70 may be 5 mm to 9 mm, such as 7 mm. Further, the aerosol generating matrix 70 may also include a filter section 72 , a cooling section 73 , a nozzle section 74 and an outer cladding 75 . The atomizing matrix section 71, the filtering section 72, the cooling section 73, and the suction nozzle section 74 are arranged in sequence along the axial direction of the aerosol generating matrix 70. Outside the mouth segment 74. The filter section 72 is used to filter the aerosol to achieve the gain effect of improving the purity of the aerosol. The cooling section 73 is used to cool down the aerosol generated by the atomized matrix section 71 and further output it to the nozzle section 74 to ensure that the aerosol output by the nozzle section 74 reaches a suitable temperature. It is understood that in other embodiments, the structure of the aerosol generating matrix 70 is not limited. For example, the aerosol generating matrix 70 can also be in an elliptical columnar shape or other shapes; for another example, the aerosol generating matrix 70 can have The filter section 72 and/or the cooling section 73 and/or the suction nozzle section 74 may not be provided.

The aerosol generating device 100 may include a heating component 10, a housing 20, a battery 30 and a circuit board 40. The heating component 10 , the battery 30 , and the circuit board 40 are all accommodated in the housing 20 . The heating component 10 is in the shape of a tube and is used to accommodate and heat the aerosol-generating substrate 70 after being powered on. The top of the housing 20 is provided with an socket 21 through which the aerosol-generating substrate 70 can be inserted into the heating assembly 10. The heating assembly 10 heats the aerosol-generating substrate 70 after being powered on. The battery 30 is electrically connected to the heating component 10 and the circuit board 40 respectively, and is used to provide power to the heating component 10 and the circuit board 40 . The circuit board 40 is used to arrange relevant control circuits.

In some embodiments, the aerosol generating device 100 may further include a dust cover 50 for covering or exposing the socket 21 . When the aerosol generating device 100 is not needed, the dust cover 50 can be pushed to cover the socket 21 to prevent dust from entering the aerosol generating device 100 . When needed, push the dust cover 50 to expose the socket 21 so that the aerosol-generating substrate 70 can be inserted from the socket 21 .

As shown in Figures 3-6, the heating assembly 10 includes a heating tube 12. The heating tube 12 is in the shape of a hollow tube. The inner wall of the heating tube 12 defines a heating cavity 120. The heating cavity 120 is used to accommodate and heat the aerosol generated. Substrate 70. The cross-section of the heating chamber 120 is a non-circular, partially concave shape. The cross-sectional profile of the heating chamber 120 has at least one concave profile 121 that is concave toward the central axis of the heating chamber 120. The at least one concave profile 121 can limit extrusion. Pressure aerosol creates a matrix 70, which is more conducive to heat conduction. The nearest distance R between the concave profile 121 and the central axis of the heating chamber 120 satisfies: R<D/2, where D is the diameter of the aerosol-generating substrate 70 . In some embodiments, D-2R=0.2mm~3.5mm, further, D-2R=0.2mm~2mm, can ensure that the aerosol generating matrix 70 has a suitable compression amount.

The cross-sectional profile of the heating chamber 120 also includes at least one connecting profile 122 connected to at least one concave profile 121 . The at least one connecting profile 122 and the at least one concave profile 121 enclose a cross-sectional profile forming a closed or non-closed heating chamber 120 . The shortest distance between the connecting contour 122 and the central axis of the heating chamber 120 is greater than or equal to the radius of the aerosol-generating matrix 70 , and the farthest distance L between the connecting contour 122 and the central axis of the heating chamber 120 is greater than or equal to the radius of the aerosol-generating matrix 70 D/2, for example, 2L-D=0.2mm~3mm. When the aerosol-generating matrix 70 is accommodated in the heating chamber 120, at least one airflow channel 1220 for airflow can be formed between the outer surface of the aerosol-generating matrix 70 and the wall surface of the heating chamber 120, which can ensure that the airflow can flow during suction. Airflow is smooth. The at least one airflow channel 1220 and the at least one connection profile 122 are arranged correspondingly in the circumferential direction of the heating chamber 120 , and the at least one airflow channel 1220 can extend along the axial direction of the heating chamber 120 .

In some embodiments, the cross-sectional profile of the heating chamber 120 is axially symmetrical and has a plurality of concave profiles 121 and a plurality of connecting profiles 122, and one connecting profile 122 is connected between every two adjacent concave profiles 121, A concave profile 121 is connected between every two adjacent connection profiles 122 . The plurality of concave contours 121 may be evenly spaced along the circumferential direction of the heating chamber 120 to facilitate uniform extrusion of the aerosol-generating matrix 70 in the circumferential direction.

Specifically, in this embodiment, the cross-sectional profile of the heating cavity 120 is generally butterfly-shaped, which includes two concave profiles 121 and two connecting profiles 122 . Two concave contours 121 are arranged oppositely, and two connecting contours 122 are arranged oppositely. The two ends of one connecting contour 122 are connected to one end of the two concave contours 121 respectively. Two air flow channels 1220 are formed between the two connecting contours 122 and the outer surface of the aerosol generating substrate 70 . Further, the concave profile 121 is an arc shape that is concave toward the heating chamber 120, the connection profile 122 is an arc shape that is convex toward the outside of the heating chamber 120, and the radius of curvature of the concave profile 121 is greater than the radius of curvature of the connection profile 122, The contact area and heat conduction area between the heating tube 12 and the aerosol generating substrate 70 can be made larger. Furthermore, the concave contour 121 and the connecting contour 122 can be smoothly connected through rounding or other methods. The nearest distance R between the concave profile 121 and the central axis of the heating chamber 120 may be greater than 2.5 mm. It can be understood that in other embodiments, the cross-sectional profile of the heating cavity 120 is not limited to a butterfly shape. For example, the number of the concave profile 121 and the connecting profile 122 may also be three or more.

When the aerosol generating substrate 70 is inserted into the heating chamber 120, it can be squeezed by the chamber wall of the heating chamber 120 into a butterfly shape similar to the cross-sectional shape of the heating chamber 120. FIG. 6 shows a cross-sectional view of the cylindrical aerosol-generating substrate 70 when it is received in the heating chamber 120 , in which the dotted line represents the cross-sectional outline of the aerosol-generating substrate 70 before being extruded. The concave profile 121 can squeeze the aerosol-generating matrix 70 to the limit, squeeze out the air inside the atomized matrix section 71 , and improve the heat conduction efficiency of the atomized matrix section 71 . In addition, heat is conducted by the outer surface of the aerosol-generating matrix 70 The heat conduction distance to its center is reduced, thereby improving the problems such as large temperature difference between the surface and center of the aerosol-generating substrate 70, low heat conduction efficiency, and long preheating time. With the heating assembly 10 of this embodiment, the amount of smoke inhaled in the first two puffs and the overall amount of smoke are significantly increased, the aerosol releases effective substances more completely, and the user experience is good.

In this embodiment, the shape of the cross-sectional outer contour of the heating tube 12 corresponds to the shape of the cross-sectional contour of the heating cavity 120 , and the heating tube 12 has a uniform wall thickness in both its axial and circumferential directions. In other embodiments, the shape of the cross-sectional outer profile of the heating tube 12 may also be different from the shape of the cross-sectional profile of the heating chamber 120 , and the heating tube 12 may also have non-uniform shapes in its axial and/or circumferential directions. Wall thickness.

Further, the heating assembly 10 further includes a guide tube 11 and a support wall 13. The guide tube 11 and the support wall 13 are respectively provided at two opposite ends of the heating tube 12 in the axial direction. The support wall 13 covers the lower end of the heating tube 12 and can support the aerosol-generating substrate 70 to support and limit the aerosol-generating substrate 70 in the heating chamber 120 . The supporting wall 13 can be integrally formed with the heating tube 12, or can be formed separately from the heating tube 12 and then assembled together.

In some embodiments, the supporting wall 13 includes a flat end wall 131 and at least one boss 132 protruding from the end wall 131 toward the heating chamber 120 . When the aerosol-generating substrate 70 is received in the heating chamber 120, the bottom surface of the aerosol-generating substrate 70 can abut against the at least one boss 132, and an air supply flow is formed between the bottom surface of the aerosol-generating substrate 70 and the end wall 131. Clear airflow gaps. In this embodiment, there is one boss 132 , and the one boss 132 is located at the center of the end wall 131 . In other embodiments, there may be multiple bosses 132 .

The guide tube 11 is provided at the upper end of the heating tube 12, and can be integrally formed with the heating tube 12, or can be formed separately from the heating tube 12 and then assembled together. The guide tube 11 is in a tubular shape, and its inner wall defines an introduction cavity 110 for introducing the aerosol-generating matrix 70 . The introduction cavity 110 has a first end 111 away from the heating cavity 120 and a second end 112 close to the heating cavity 120 . The cross-sectional area of the introduction cavity 110 at the first end 111 is greater than or equal to the cross-sectional area of the aerosol generating matrix 70 before being extruded, or the cross-sectional profile of the introduction cavity 110 at the first end 111 is consistent with the center of the introduction cavity 110 The shortest distance between the axes is greater than or equal to the radius of the aerosol-generating matrix 70 , which facilitates the introduction of the aerosol-generating matrix 70 .

The cross-sectional shape of the introduction chamber 110 at the first end 111 may have a shape different from both the cross-sectional shape of the aerosol-generating substrate 70 and the cross-sectional shape of the heating chamber 120 . In this embodiment, the cross-sectional shape of the introduction cavity 110 at the first end 111 is generally racetrack-shaped, and its major axis direction and minor axis direction coincide with the major axis direction and minor axis direction of the heating cavity 120 respectively. In other embodiments, the cross-sectional shape of the introduction chamber 110 at the first end 111 may also correspond to the cross-sectional shape of the aerosol-generating substrate 70 or the cross-sectional shape of the heating chamber 120 . For example, the introduction chamber 110 may be formed at the first end 111 of the introduction chamber 110 at the first end 111 . The cross-sectional shape of one end 111 may be circular or butterfly-shaped.

The cross-sectional area of the introduction cavity 110 at the second end 112 is smaller than the cross-sectional area at the first end 111 , and the cross-sectional shape of the introduction cavity 110 at the second end 112 is the same as the cross-sectional shape of the heating cavity 120 . In this embodiment, the second end 112 of the introduction cavity 110 is directly connected to the upper end of the heating cavity 120 , and the cross-sectional size of the second end 112 of the introduction cavity 110 is the same as the cross-sectional size of the heating cavity 120 . The introduction cavity 110 may adopt a smooth gradual transition from the first end 111 to the second end 112 so that the aerosol generating matrix 70 can be smoothly inserted into the heating tube 12 . Specifically, in this embodiment, the cross-sectional shape of the introduction cavity 110 gradually changes from a racetrack shape at the first end 111 to a butterfly shape at the second end 112 , and is connected to the heating tube 12 at the second end 112 .

In this embodiment, the shape of the cross-sectional outer profile of the guide tube 11 corresponds to the shape of the cross-sectional profile of the introduction cavity 110 , and the guide tube 11 has a uniform wall thickness in both its axial and circumferential directions. In other embodiments, the shape of the cross-sectional outer profile of the guide tube 11 may also be different from the shape of the cross-sectional profile of the introduction cavity 110 , and the guide tube 11 may also have non-uniform shapes in its axial and/or circumferential directions. Wall thickness.

Furthermore, the outer wall surface of the upper end of the guide tube 11 away from the heating tube 12 can also extend outward to form a flange 113 . The flange 113 can be used for installation and positioning of the heating component 10 in the housing 20 .

In some embodiments, the heating component 10 may also be provided with several through holes communicating with the heating chamber 120 and/or the introduction chamber 110 . The plurality of through holes can be opened at any position of the heating component 10 as needed. For example, they can be opened in the guide tube 11 and/or the heating tube 12 and/or the support wall 13 . The shape, size and number of the through holes are not limited.

The heating form of the heating component 10 is not limited. For example, it can be various heating forms such as resistance conduction heating, infrared radiation heating, electromagnetic induction heating, or composite heating. The heating assembly 10 also includes a heat-generating layer 14 disposed on the inner surface and/or the outer surface of the heating tube 12 . The heating layer 14 may include a heating film, a heating wire, a heating sheet or a heating mesh, which can generate heat after being powered on.

In this embodiment, the heating layer 14 is a heating film and is disposed on the outer surface of the heating tube 12 . The heat-generating layer 14 generates heat after being energized, and transfers the generated heat from the outer surface of the heating tube 12 to the aerosol-generating substrate 70 accommodated in the heating tube 12 to heat the aerosol-generating substrate 70 . The heating tube 12 can be made of metal or non-metallic materials with high thermal conductivity, which is conducive to rapid heat transfer, and the temperature field uniformity of the heating tube 12 is good under rapid temperature rise. The metal material with higher thermal conductivity may include stainless steel, aluminum or aluminum alloy. The non-metallic material with higher thermal conductivity may include ceramics, such as aluminum oxide, silicon carbide, aluminum nitride, silicon nitride and other ceramics. Furthermore, the inner surface and/or the outer surface of the heating tube 12 may also be provided with a uniform heat layer, which has a higher thermal conductivity than the heating tube 12 , thereby further improving the uniformity of heating of the aerosol-generating substrate 70 . sex.

In some embodiments, the heat-generating layer 14 may include a heat-generating part 141 and a conductive part 142. The heat-generating part 141 and the conductive part 142 are respectively arranged corresponding to the concave profile 121 and the connection profile 122. The resistivity of the conductive part 142 is smaller than the resistivity of the heating part 141 , so that when electricity is applied, the calorific value of the conductive part 142 is smaller than the calorific value of the heating part 141 . For example, the calorific value of the conductive part 142 is less than or equal to the calorific value of the heating part 141 . 1/2. The heating part 141 is mainly used to generate heat, and the conductive part 142 is mainly used to achieve electrical conduction of the heating part 141 . Since the concave profile 121 is in close contact with the aerosol-generating matrix 70 and most of the connecting profile 122 is not in contact with the aerosol-generating matrix 70 , by designing the calorific value of the heating part 141 to be greater than the calorific value of the conductive part 142 , it can be greatly improved. Energy utilization.

Figure 7 shows the heating component 10 in the first alternative of the present invention. The main difference from the above-mentioned embodiment is that the heating component 10 in this embodiment adopts infrared heating. Correspondingly, the heating component 10 also includes a device The infrared layer 15 on the surface of the heating tube 12. This embodiment is conducive to infrared penetrating heating of the aerosol-generating substrate 70, forming a three-dimensional heating field, which can better stimulate the fragrance of the aerosol-generating substrate 70, has better heat utilization rate, and can reduce energy consumption.

Specifically, in this embodiment, the infrared layer 15 is disposed on the inner surface of the heating tube 12 for generating infrared heat radiation. The heating tube 12 can be made of metal or non-metallic materials with low thermal conductivity to reduce heat conduction to the outside and reduce heat loss. It is understood that in other embodiments, the infrared layer 15 can also be disposed on the outer surface of the heating tube 12. In this case, the heating tube 12 can be made of quartz or other materials with high infrared transmittance.

Further, the heating component 10 may also include a protective layer 16 disposed on the inner surface of the heating tube 12 . The protective layer 16 is disposed inside the infrared layer 15 and may include a glass glaze layer or a ceramic coating. The heating tube 12 and the infrared layer 15 are in contact with the aerosol-generating matrix 70 through the protective layer 16. The protective layer 16 has a high surface smoothness, which is conducive to the insertion and removal of the aerosol-generating matrix 70, and the aerosol-generating matrix 70 is not easy to heat after heating. Adhered to the protective layer 16.

Further, in this embodiment, the heating component 10 further includes a heat uniformity layer 17 provided on the outer surface of the heating tube 12 and a dielectric layer 18 provided between the heat uniformity layer 17 and the heat generating layer 14 . The uniform heat layer 17, the dielectric layer 18, and the heating layer 14 are arranged on the outer surface of the heating tube 12 in order from the inside to the outside. The heat uniformity layer 17 adopts heat uniformity material for uniform temperature field. In some embodiments, the heat-spreading layer 17 may be made of highly thermally conductive materials such as copper or silver. The dielectric layer 18 is used to carry the heating layer 14, to increase the structural stability of the heating layer 14, and to prevent the heating layer 14 from detaching.

Figure 8 shows the heating assembly 10 in the second alternative of the present invention, the main difference from the above embodiment is that the heating layer 14 in this embodiment includes at least two heating tracks 140. The at least two heating tracks 140 are arranged in parallel, are respectively connected to the circuit board 40 , and can work individually or simultaneously under the control of the circuit board 40 . The at least two heating tracks 140 may be distributed along the axial direction and/or circumferential direction of the heating tube 12 , thereby achieving segmented heating in the axial direction and/or circumferential direction of the heating tube 12 .

It can be understood that the above technical features can be used in any combination without limitation.

The above embodiments only express specific embodiments of the present invention, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention; it should be noted that for those of ordinary skill in the art, Without departing from the concept of the present invention, the above technical features can be freely combined, and several modifications and improvements can be made, which all belong to the protection scope of the present invention; therefore, any equivalent transformations made within the scope of the claims of the present invention and modifications shall fall within the scope of the claims of the present invention.

Claims

A heating assembly, characterized in that a heating cavity (120) for accommodating an aerosol-generating substrate (70) is formed in the heating assembly (10), and the cross-sectional profile of the heating cavity (120) includes a direction toward the At least one concave profile (121) of the central axis of the heating chamber (120), said at least one concave profile (121) being configured for pressing the aerosol generating matrix (70).
The heating assembly according to claim 1, characterized in that the cross-sectional profile of the heating chamber (120) further includes at least one connection profile (122) connected to the at least one concave profile (121), said The furthest distance between at least one connecting contour (122) and the central axis of the heating chamber (120) is greater than the radius of the aerosol-generating matrix (70).
The heating component according to claim 2, characterized in that the at least one concave profile (121) and the at least one connection profile (122) are both smooth curves, and the at least one concave profile (121 ) is smoothly connected to the at least one connection profile (122).
The heating assembly according to claim 2, characterized in that the at least one concave profile (121) includes a plurality of concave profiles (121) along the heating cavity (121). 120) is evenly spaced in the circumferential direction; the at least one connection profile (122) includes a plurality of connection profiles (122), the plurality of connection profiles (122) are evenly spaced in the circumferential direction of the heating cavity (120) .
The heating assembly according to claim 2, characterized in that the at least one concave profile (121) includes two concave profiles (121), the two concave profiles (121) are located in the heating cavity (121). 120) are circumferentially oppositely arranged; the at least one connection profile (122) includes two connection profiles (122), and the two connection profiles (122) are circumferentially oppositely arranged in the heating cavity (120); the The two concave contours (121) and the two connecting contours (122) are both arc-shaped contours.
The heating assembly according to claim 5, characterized in that the radius of curvature of the two concave profiles (121) is greater than the radius of curvature of the two connecting profiles (122).
The heating assembly according to claim 2, characterized in that, in a state where the aerosol-generating substrate (70) is accommodated in the heating chamber (120), the at least one connection profile (122) is connected to the aerosol-generating matrix (70). At least one airflow channel (1220) is defined between outer surfaces of the production matrix (70).
The heating component according to claim 2, characterized in that the heating component (10) includes a heating tube (12) and a heating layer (14) provided on the heating tube (12); the heating tube (12) ) is tubular in shape, and the inner wall surface of the heating tube (12) defines the heating cavity (120).
The heating component according to claim 8, characterized in that the heating layer (14) includes a heating portion (141) corresponding to the at least one concave profile (121) and a heating portion (141) corresponding to the at least one connecting profile (121). 122) Correspondingly provided conductive part (142), the resistivity of the heating part (141) is greater than the resistivity of the conductive part (142).
The heating assembly according to claim 8, characterized in that the heating layer (14) includes at least two parallel heating tracks (140), and at least two of the heating tracks (140) are along the heating tube (12). ) axial and/or circumferential distribution.
The heating component according to claim 8, characterized in that the heating component (10) further includes an infrared layer (15) provided on the heating tube (12).
The heating component according to claim 11, characterized in that the heating component (10) further includes a heat uniformity layer (17) provided on the heating tube (12).
The heating assembly according to claim 12, characterized in that the infrared layer (15) is provided inside the heating tube (12), and the uniform heat layer (17) is provided on the heating tube (12). On the outside, the heating layer (14) is arranged on the outside of the heat equalizing layer (17);

The heating component (10) also includes a dielectric layer (18) disposed between the heat equalizing layer (17) and the heat generating layer (14).
The heating assembly according to any one of claims 1 to 13, characterized in that an introduction cavity (110) is also formed in the heating assembly (10), and the introduction cavity (110) and the heating cavity (120) ) is connected and used to introduce the aerosol generating matrix (70).
The heating assembly according to claim 14, characterized in that the introduction cavity (110) has a first end (111) away from the heating cavity (120) and a second end close to the heating cavity (120). (112), the nearest distance between the cross-sectional profile of the first end (111) of the introduction chamber (110) and the central axis of the introduction chamber (110) is greater than or equal to the aerosol generating matrix (70) ) radius.
The heating assembly according to claim 15, characterized in that the cross-sectional area of the introduction cavity (110) at the first end (111) is greater than the cross-sectional area at the second end (112).
The heating assembly according to claim 16, characterized in that the cross-sectional profile of the introduction cavity (110) is a gradual transition from the first end (111) to the second end (112).
The heating assembly according to any one of claims 1 to 13, characterized in that the heating assembly (10) further includes an end provided on the heating chamber (120) for supporting the aerosol generating matrix (70). ) of the supporting wall (13).
The heating assembly according to claim 18, characterized in that the support wall (13) includes an end wall (131) and at least one protrusion protruding from the end wall (131) toward the heating cavity (120). Taiwan (132).
An aerosol generating device, characterized by comprising a heating component (10) as described in any one of claims 1-19.