Heating assembly and aerosol-generating device

Abstract

The utility model relates to the technical field of aerosol generating devices, and provides a heating assembly and an aerosol generating device.The heating assembly comprises an aerosol substrate, a cup body and a heating piece. The aerosol substrate comprises a substrate section; an accommodating cavity for accommodating an aerosol substrate is formed in the cup body; an air inlet channel communicated with the containing cavity is formed in the heating assembly, and the heating piece is used for heating air flow in the air inlet channel and heating the cup body; airflow in the air inlet channel can flow into the matrix section; the inner surface of the containing cavity comprises a contact surface, when the aerosol substrate is inserted into the containing cavity, the contact surface makes contact with at least part of the substrate section so as to conduct heat to the substrate section, and the area of the contact surface is A; the total area of the outer surfaces of the substrate sections is B; wherein A / B is less than or equal to 40%. According to the heating assembly and the aerosol generating device, the problem that the mouth is scalded by aerosol due to the fact that much water is atomized in a short time can be prevented, and the problem that the heating area of the aerosol matrix is too large in the short time is prevented.

Description

TECHNICAL FIELD

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

[0002] The aerosol generating device is a device capable of generating aerosol by heating aerosol substrate. Generally, the aerosol substrate is inserted into a heating cup of the aerosol generating device, and the heating cup contacts the aerosol substrate by heat conduction to transfer heat to the aerosol substrate, thereby heating the aerosol substrate.

[0003] However, the heating cup often contacts the aerosol substrate in a large area, which causes the aerosol substrate to be baked as a whole in a short time, resulting in a large amount of water being atomized in a short time, which is easy to cause the aerosol to be too hot and the mouth to be too hot. In addition, the heating area of the aerosol substrate is too large in a short time, and the overall heating temperature is also higher, which increases the difficulty of atomization. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a heating assembly and an aerosol generating device, which can solve a series of problems caused by the large contact heating area of the aerosol substrate.

[0005] In order to solve the above technical problems, the present application provides a heating assembly applied to an aerosol generating device, which comprises an aerosol substrate, a cup body and a heating piece. The aerosol substrate comprises a substrate section; the cup body is provided with a containing cavity for accommodating the aerosol substrate; the heating assembly is provided with an air inlet channel communicating with the containing cavity, and the heating piece is used for heating the airflow in the air inlet channel and the cup body; the airflow in the air inlet channel can flow into the substrate section; the inner surface of the containing cavity comprises a contact surface, and when the aerosol substrate is inserted into the containing cavity, the contact surface contacts at least part of the substrate section to conduct heat to the substrate section, and the area of the contact surface is A; the total area of the outer surface of the substrate section is B; wherein A / B≤40%.

[0006] In an embodiment, the containing cavity has an opening for inserting the aerosol substrate into the containing cavity, and the inner surface of the containing cavity comprises a side surface arranged along the periphery of the opening and a bottom surface arranged opposite to the opening, and at least part of the side surface and / or at least part of the bottom surface form the contact surface.

[0007] In an embodiment, a protrusion is arranged on the side surface and / or the bottom surface, and the surface of the protrusion facing the substrate section forms the contact surface.

[0008] In an embodiment, the protrusions are arranged along the circumference of the containing cavity, and the protrusions are continuous annular, or the protrusions comprise a plurality of protrusions arranged at intervals along the circumference of the containing cavity.

[0009] In an embodiment, the aerosol substrate, when inserted into the accommodation cavity, forms an air inlet channel between the aerosol substrate and the inner surface of the accommodation cavity, the air inlet channel comprising an air inlet end and an air outlet end, the air inlet end being disposed proximate to the opening, and the air outlet end being disposed distal to the opening.

[0010] In an embodiment, the side surface and the bottom surface have a recess, the recess forming the air inlet channel.

[0011] In an embodiment, the depth of the accommodation cavity is not greater than 40% of the length of the substrate segment.

[0012] In an embodiment, the cup comprises a main body portion and a partition portion, the partition portion separating the interior of the main body portion into the mounting cavity and the accommodation cavity, the partition portion being provided with an air hole that communicates between the mounting cavity and the accommodation cavity.

[0013] The heating assembly further comprises a heat exchange core, at least a portion of the heat exchange core being disposed within the mounting cavity, the heat exchange core being provided with a plurality of heat exchange channels, the heat exchange channels being air inlet channels, the heat exchange channels being in communication with the air hole and the atmosphere, and a heating element being wrapped around the periphery of the heat exchange core so as to heat the airflow entering the heat exchange channels.

[0014] In an embodiment, the heating assembly further comprises a base assembly, at least a portion of the base assembly being disposed between the cavity wall of the mounting cavity and the heating element, the heating element being capable of transferring heat to the cup via the base assembly.

[0015] To solve the above technical problems, the present application provides an aerosol generating device, the aerosol generating device comprising the heating assembly according to any one of the above.

[0016] The application provides a heating assembly applied to an aerosol generating device. The heating assembly comprises an aerosol substrate, a cup body and a heating piece. The aerosol substrate comprises a substrate section; the cup body is internally provided with a receiving cavity for accommodating the aerosol substrate; the heating assembly is internally provided with an air inlet channel communicating with the receiving cavity, and the heating piece is used for heating air flow in the air inlet channel and the cup body; the air flow in the air inlet channel can flow into the substrate section; an inner surface of the receiving cavity comprises a contact surface, the contact surface contacts at least part of the substrate section when the aerosol substrate is inserted into the receiving cavity to conduct heat to the substrate section, the area of the contact surface is A; the total area of the outer surface of the substrate section is B; and A / B≤40%. The heating assembly of the application uses contact heating and hot air flow heating to heat the aerosol substrate. Since the area of the contact surface of the cup body accounts for only 40% of the total area of the substrate section, the aerosol substrate as a whole is not baked in a short time after the heating piece starts heating, but only about 40% of the area of the outer surface of the substrate section is baked, thereby preventing the problem of a large amount of water being atomized in a short time to cause the problem of a burnt mouth of the aerosol, and preventing the problem of a large heating area of the aerosol substrate in a short time. When a user inhales, the heating piece can heat the gas in the air inlet channel into hot air flow, so that the substrate section can be more fully heated on the basis of a small amount of contact heating. Since the heating efficiency of the hot air flow is relatively low compared with direct contact heating, and the hot air flow enters the inside of the aerosol substrate to be heated only when the user inhales, the whole heating process does not have the problems of rapid heating and a large heating area in a short time. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A structural schematic view of a heating assembly provided by an embodiment of the application is shown in the figure;

[0018] Figure 2 An exploded view of the heating assembly is shown in the figure; Figure 1 A sectional view of the heating assembly is shown in the figure;

[0019] Figure 3 A sectional view of the heating assembly is shown in the figure; Figure 1 A sectional view of the heating assembly is shown in the figure;

[0020] Figure 4 A structural schematic view of a heating assembly provided by another embodiment of the application is shown in the figure;

[0021] Figure 5 A sectional view of the heating assembly is shown in the figure; Figure 4 A sectional view of the heating assembly is shown in the figure;

[0022] Figure 6 A structural schematic view of a cup body and a heating piece provided by an embodiment of the application is shown in the figure;

[0023] Figure 7 A structural schematic view of a cup body and a heating piece provided by another embodiment of the application is shown in the figure.

[0024] BRIEF DESCRIPTION OF DRAWINGS: aerosol substrate 10, substrate section 11, temperature reduction section 12, suction section 13, cup body 20, accommodating cavity 21, contact surface 211, opening 212, protrusion 213, recess 214, main body portion 215, partition portion 216, mounting cavity 217, heating element 30, air inlet channel 40, heat exchange core 50, heat exchange channel 51, base assembly 60. DETAILED DESCRIPTION

[0025] The application will be further described below in connection with specific embodiments with reference to the attached drawings. Like numbers in different figures refer to elements with the same function. In the following description, numerous specific details are described to provide a thorough understanding of the application. However, those skilled in the art will recognize that the application can be practiced without the specific details given. In other instances, well-known structures have not been described in detail in order not to obscure the application. Embodiments are described herein with reference to the figures.

[0026] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments, and the steps involved in the operations of each embodiment can be sequentially adjusted or changed in a manner that can be easily understood by those skilled in the art. Therefore, the specification and drawings are only intended to clearly describe one embodiment, and do not mean that the components and / or order are necessary.

[0027] The serial numbers of components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any order or technical meaning. Unless otherwise specified, the "connection" and "coupling" in this application include direct and indirect connection (coupling).

[0028] The terms "parallel", "perpendicular" and the like are defined in relation to the current process level, rather than the absolute strict definition in the mathematical sense, and a small amount of deviation is allowed, and approximate parallel, approximate perpendicular and the like are also allowed. For example, A is parallel to B, which means that A is parallel to B or approximately parallel to B, and the included angle between A and B is between 0° and 10°. For example, A is perpendicular to B, which means that A is perpendicular to B or approximately perpendicular to B, and the included angle between A and B is between 80° and 100°. The orientation terms mentioned in the embodiments of the present application, such as "upper", "inner", "outer", "side" and the like, are only the directions of the drawings, therefore, the orientation terms used are for better and clearer illustration and understanding of the embodiments of the present application, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0029] The present application provides an aerosol generating device, which comprises a heating assembly according to any one of the embodiments described below, and the heating assembly is used to heat an aerosol substrate to generate an aerosol. In addition, the aerosol generating device can further comprise a power supply, a circuit board, an airflow sensor and other electronic components.

[0030] Please refer to Figures 1-4 As shown in the drawings, the present application provides a heating assembly which can be applied to an aerosol generating device. The heating assembly comprises an aerosol substrate 10, a cup body 20 and a heating element 30.

[0031] The aerosol substrate 10 is generally solid, and the aerosol substrate 10 usually comprises a substrate section 11, a cooling section 12 and a smoking section 13. The substrate section 11 can be provided with a leafy substrate, such as tobacco, which can generate an aerosol after being heated. One end of the cooling section 12 is connected to the substrate section 11, and the other end of the cooling section 12 is connected to the smoking section 13. The cooling section 12 is provided with a cooling air passage and cooling holes, and the cooling holes are in communication with the outside air and the cooling air passage, so that the relatively hot aerosol generated by the substrate section 11 can be mixed with the cold air entering the cooling air passage from the cooling holes after entering the cooling air passage, thereby achieving the function of reducing the temperature of the aerosol. The user can smoke the aerosol by smoking the smoking section 13, and the smoking section 13 can be provided with a filter material to filter the aerosol. In addition, the aerosol substrate 10 can further comprise an outermost packaging paper and the like. The structure of the aerosol substrate 10 is not limited to the structure mentioned above, and can also be other structures known to those skilled in the art.

[0032] As Figure 2 , 6As shown in FIGS. 7, the cup 20 is provided with a receiving cavity 21, which is used to accommodate the aerosol substrate 10, specifically, the receiving cavity 21 is used to accommodate at least part of the substrate segment 11. The heating assembly is provided with an air inlet channel 40, which is in communication with the receiving cavity 21 and the external atmosphere. The air inlet channel 40 can be arranged outside the receiving cavity 21 or arranged inside the receiving cavity 21. Since the air inlet channel 40 is in communication with the receiving cavity 21 and the external atmosphere, when the user inhales, the external airflow can enter the substrate segment 11 arranged in the receiving cavity 21 through the air inlet channel 40, specifically, the air inlet channel 40 can enter the substrate segment 11 from the bottom of the substrate segment 11.

[0033] The heating piece 30 is used to heat the airflow in the air inlet channel 40 and the cup 20. The heating piece 30 can be in the form of a heating sheet, a heating film, a heating net, a heating wire, etc. The heating piece 30 can be electrically connected to the circuit board in the aerosol generating device through a lead wire.

[0034] The inner surface of the receiving cavity 21 includes a contact surface 211, which is in contact with at least part of the substrate segment 11 when the aerosol substrate 10 is inserted into the receiving cavity 21, so as to conduct heat to the substrate segment 11. The area of the contact surface 211 is A, and the total area of the outer surface of the substrate segment 11 is B. Generally, the outer surface of the substrate segment 11 includes the side surface and the bottom surface of the substrate segment 11. Wherein, A / B≤40%.

[0035] The heating assembly of the present application uses contact heating and hot airflow heating to heat the aerosol substrate 10 together. Since the area of the contact surface 211 of the cup 20 only accounts for 40% of the total area of the substrate segment 11, after the heating piece 30 starts heating, the aerosol substrate 10 will not be baked as a whole in a short time, but only about 40% of the area of the outer surface of the substrate segment 11 is baked, which prevents the problem of too much water being atomized in a short time to cause the mouth of the aerosol to be scalded, and prevents the problem of the heating area of the aerosol substrate 10 being too large in a short time. When the user inhales, the heating piece 30 can heat the gas in the air inlet channel 40 into a hot airflow, so that the substrate segment 11 can be more fully heated on the basis of a small amount of contact heating. Since the heating efficiency of the hot airflow is relatively low compared to direct contact heating, and the hot airflow only enters the inside of the aerosol substrate 10 when the user inhales to heat, the whole heating process will not have the problem of heating and rising too fast in a short time and the heating area being too large.

[0036] In one embodiment, as shown in FIG. 8, the aerosol generating device is provided with a heating assembly 2, which includes a cup 20 and a heating piece 30. The cup 20 is provided with a receiving cavity 21, which is used to accommodate the aerosol substrate 10. The heating piece 30 is arranged in the receiving cavity 21 and is used to heat the airflow in the air inlet channel 40 and the cup 20. Figure 2 、 6As shown in Figure 7, the receiving cavity 21 has an opening 212 for inserting and withdrawing the aerosol matrix 10 into and out of the receiving cavity 21. The inner surface of the receiving cavity 21 includes a side surface disposed along the periphery of the opening 212 and a bottom surface disposed opposite to the opening 212, the side surface and the bottom surface enclosing the receiving cavity 21. At least a portion of the side surface and / or at least a portion of the bottom surface forms a contact surface 211. For example, in... Figures 1-3 In this embodiment, a contact surface 211 is formed on the side of the accommodating cavity 21. Figure 6 In one embodiment, a portion of the side surface and a portion of the bottom surface of the accommodating cavity 21 form a contact surface 211. Figure 7 In one embodiment, a portion of the bottom surface of the accommodating cavity 21 forms a contact surface 211.

[0037] like Figures 5-7 As shown, in one embodiment, a protrusion 213 is provided on the side and / or bottom surface of the accommodating cavity 21, and the protrusion 213 forms a contact surface 211 facing the surface of the matrix segment 11. By providing a protrusion 213 on the side and / or bottom surface of the accommodating cavity 21, and the protrusion 213 contacting the aerosol matrix 10, a gap can be formed between the aerosol matrix 10 and the cavity wall of the accommodating cavity 21, thereby reducing the proportion of the area in direct contact between the cup body 20 and the aerosol matrix 10. The gap between the aerosol matrix 10 and the cavity wall of the accommodating cavity 21 contains air. The heat transfer efficiency through air is relatively low compared to direct contact heat transfer. Therefore, it can prevent the heating element from heating the matrix segment 11 too quickly and the heating area from being too large in a short time.

[0038] Furthermore, the protrusions 213 are arranged circumferentially along the accommodating cavity 21 to surround the outer periphery of the aerosol matrix 10, so as to heat the outer periphery of the aerosol matrix 10 more uniformly.

[0039] like Figure 7 As shown, the protrusion 213 can be a continuous ring, which can be a circular ring or other irregular rings, such as in... Figure 7 In the embodiment, the protrusion 213 is an irregular ring formed by hollowing out several holes in a circular ring. Of course, the protrusion 213 can also be other shapes, not limited to the above-mentioned shapes.

[0040] Or, such as Figure 6 As shown, the protrusion 213 includes multiple protrusions, which are spaced apart along the circumference of the receiving cavity 21. By spaced apart, the gaps between the multiple protrusions can form an air band, thereby reducing the proportion of the area in direct contact between the cup body 20 and the aerosol matrix 10.

[0041] In one embodiment, such as Figure 5As shown, when the aerosol substrate 10 is inserted into the accommodating cavity 21, an air inlet channel 40 is formed between the aerosol substrate 10 and the inner surface of the accommodating cavity 21, the air inlet channel 40 includes an air inlet end and an air outlet end, the air inlet end is arranged close to the opening 212, and the air outlet end is arranged away from the opening 212. That is, in this embodiment, the cup 20 inhales air from the top of the cup 20, and the air flow enters the substrate section 11 through the gap between the aerosol substrate 10 and the inner surface of the accommodating cavity 21. Since the cup 20 has a certain amount of heat, the air flow passing through the gap between the aerosol substrate 10 and the inner surface of the accommodating cavity 21 can be preheated by the cup 20, and the air flow can subsequently enter the substrate section 11 for hot air flow heating, which is beneficial to improve the heat utilization rate of the heating assembly.

[0042] Further, as shown in Figure 6 and Figure 7 , the side surface and the bottom surface have a recessed portion 214, and the recessed portion 214 forms the air inlet channel 40. When the protrusion 213 is arranged, the recessed portion 214 is formed in the accommodating cavity 21, which can not only reduce the contact area between the inner surface of the accommodating cavity 21 and the contact surface 211 of the substrate section 11, but also form the air inlet channel 40 of the air flow. This embodiment effectively utilizes the recessed structure in the accommodating cavity 21, does not need to additionally arrange air inlet elements, saves the cost of the heating assembly, and improves the assembly efficiency of the heating assembly.

[0043] As shown in Figures 1-3 , in an embodiment, the depth of the accommodating cavity 21 is not greater than 40% of the length of the substrate section 11. In this embodiment, the depth of the substrate section 11 inserted into the accommodating cavity 21 can be reduced to control the area of the contact surface 211 of the substrate section 11 with the cup 20, that is, the depth of the accommodating cavity 21 can be controlled to control the area of the contact surface 211. Preferably, due to the shallow depth of the accommodating cavity 21, in order not to excessively affect the heating effect of the substrate section 11, the entire side surface of the accommodating cavity 21 can be in contact with the side surface of the substrate section 11 located in the accommodating cavity 21.

[0044] In an embodiment, as shown in Figure 3 , the cup 20 includes a main body portion 215 and a partition portion 216, the main body portion 215 has an internal cavity, and the partition portion 216 divides the internal cavity of the main body portion 215 into a mounting cavity 217 and the accommodating cavity 21. The partition portion 216 is provided with an air hole communicating the mounting cavity 217 and the accommodating cavity 21.

[0045] The heating assembly further comprises a heat exchange core 50, at least a portion of the heat exchange core 50 is arranged in the mounting cavity 217. The heat exchange core 50 is provided with a plurality of heat exchange channels 51, the heat exchange channels 51 form the air inlet channel 40, the heat exchange channels 51 are communicated with the air holes and the external atmosphere, so that the airflow can enter the substrate section 11 in the containing cavity 21 through the heat exchange channels 51 and the air holes. The heating element 30 is wrapped around the outer periphery of the heat exchange core 50, so as to heat the airflow in the heat exchange channels 51. In this way, the heating element 30 can heat the airflow in the heat exchange channels 51 inside the heat exchange core 50, so that the airflow entering the aerosol substrate 10 is heated into a hot airflow.

[0046] Further, the heating assembly further comprises a base assembly 60, at least a portion of the base assembly 60 is arranged between the cavity wall of the mounting cavity 217 and the heating element 30, the heat of the heating element 30 can be transmitted to the cup 20 through the base assembly 60, and the base assembly 60 can also support the heat exchange core 50, so as to mount the heat exchange core 50 in the mounting cavity 217. The heat exchange core 50 can be made of a material with high thermal conductivity, so that most of the heat of the heating element 30 heats the gas in the heat exchange channels 51, and a small part of the heat is transmitted to the cup 20, so that the heating mode of the heating assembly is mainly hot airflow heating.

[0047] In other embodiments, as shown in Figure 4 and Figure 5 The heating element 30 can also be arranged on the outer surface of the cup 20, especially when the air inlet channel 40 is a gap between the inner surface of the containing cavity 21 and the aerosol substrate 10. The heating element 30 arranged on the outer surface of the cup 20 not only heats the cup 20, but also heats the airflow in the air inlet channel 40 in the cup 20.

[0048] The above application of specific examples to illustrate the present application, is only used to help understand the invention, and does not limit the present application. For those skilled in the art to which the present application belongs, according to the idea of the present application, a number of simple deductions, deformations or substitutions can be made.

Claims

1. A heating assembly for an aerosol-generating device, the heating assembly comprising: The application relates to a heating assembly. The heating assembly comprises: an aerosol substrate, which comprises a substrate section; a cup body, which is internally provided with a receiving cavity for accommodating the aerosol substrate; a heating component, which is internally provided with an air inlet channel communicating with the receiving cavity, and is used for heating air flow in the air inlet channel and the cup body; the air flow in the air inlet channel can flow into the substrate section; 2. The heating assembly of claim 1, wherein, an inner surface of the receiving cavity comprises a contact surface, which is in contact with at least part of the substrate section when the aerosol substrate is inserted into the receiving cavity, so as to conduct heat to the substrate section; an area of the contact surface is A; a total area of an outer surface of the substrate section is B; wherein A / B<=40%.

3. The heating assembly of claim 2, wherein, The receiving cavity is provided with an opening for inserting the aerosol substrate into the receiving cavity; an inner surface of the receiving cavity comprises a side surface arranged along a circumferential side of the opening and a bottom surface arranged opposite to the opening; at least part of the side surface and / or at least part of the bottom surface forms the contact surface.

4. The heating assembly of claim 3, wherein, The side surface and / or the bottom surface is provided with a protrusion, which forms the contact surface towards a surface of the substrate section.

5. The heating assembly according to any one of claims 2-4, characterized in that, The protrusion is arranged along a circumferential direction of the receiving cavity; the protrusion is a continuous ring, or the protrusion comprises a plurality of protruding blocks which are arranged at intervals along the circumferential direction of the receiving cavity.

6. The heating assembly of claim 5, wherein, When the aerosol substrate is inserted into the receiving cavity, the aerosol substrate and the inner surface of the receiving cavity form the air inlet channel, which comprises an air inlet end and an air outlet end; the air inlet end is arranged close to the opening; the air outlet end is arranged away from the opening.

7. The heating assembly of claim 1, wherein, The side surface and the bottom surface are provided with a recess, which forms the air inlet channel.

8. The heating assembly of claim 1, wherein, A depth of the receiving cavity is not greater than 40% of a length of the substrate section. The cup body comprises a main body and a separation part, which separates an inner part of the main body into a mounting cavity and the receiving cavity; the separation part is provided with an air hole communicating between the mounting cavity and the receiving cavity; 9. The heating assembly of claim 8, wherein, The heating assembly further comprises a heat exchange core, at least part of which is arranged in the mounting cavity; the heat exchange core is internally provided with a plurality of heat exchange channels; the heat exchange channels are the air inlet channels; the heat exchange channels communicate with the air hole and external atmosphere; the heating component is wrapped around an outer periphery of the heat exchange core, so as to heat air flow entering the heat exchange channels.

10. An aerosol-generating device comprising: The heating assembly further comprises a base component, at least part of which is arranged between a cavity wall of the mounting cavity and the heating component; heat of the heating component can be transmitted to the cup body through the base component. The application further relates to a heating assembly comprising any one of the heating assemblies according to claims 1-9.

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