Heating assembly and aerosol-generating device

Abstract

The utility model provides a heating assembly and an aerosol generating device. The heating assembly comprises a cup body and a heating body. A center part and an outer side part arranged on the outer side of the center part are arranged in the cup body, the center part is provided with a containing cavity and a heating cavity, and one end of the containing cavity is provided with an opening; the heating body is arranged in the heating cavity, the heating body is used for heating airflow flowing into the heating cavity into hot airflow, and the hot airflow is used for flowing into the containing cavity to heat the aerosol product; the outer side part is provided with a first air inlet channel, the first air inlet channel is provided with an air inlet end and an air outlet end, the air inlet end is arranged on the side close to the opening, and the air outlet end is arranged on the side away from the opening; the other end of the heating cavity is communicated with the containing cavity. According to the heating assembly, the first air inlet channel, the heating cavity for heating the hot air flow and the containing cavity for containing the aerosol product can be integrated in the cup body, the structural design in the device is simplified, the whole interior of the cup body has good sealing performance, and the suction experience of a user is improved.

Description

TECHNICAL FIELD

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

[0002] In the aerosol generating device, a heating body is usually used to heat the aerosol product, wherein the heating body is located at the upstream end of the aerosol product, and hot air is used to heat the aerosol product, so that the generated aerosol is sucked out from the filter segment of the aerosol product along with the airflow. However, the above-mentioned device usually uses bottom air inlet, and a corresponding air inlet structure with an air inlet channel inside needs to be arranged in the device, and the space reservation of the air duct needs to be considered in the structural design, and strict sealing needs to be ensured between the internal support, the heating body and the air inlet structure of the aerosol generating device, which makes the internal structure design of the device complex, the number of parts is large, and if the sealing is poor, it will cause air leakage and affect the suction resistance, affecting the smoking experience. UTILITARIAN CONTENT

[0003] The present application provides a heating assembly and an aerosol generating device, which solves the problem of complex design and poor sealing in the aerosol generating device.

[0004] In order to solve the above technical problems, the present application provides a heating assembly, which comprises a cup body and a heating body. The cup body is provided with a center part and an outer side part located outside the center part, the center part has a containing cavity and a heating cavity, the containing cavity is used to accommodate the aerosol product, one end of the containing cavity has an opening, the opening is used for the aerosol product to be loaded into the containing cavity; the heating body is arranged in the heating cavity, and the heating body is used to heat the airflow flowing into the heating cavity into hot airflow, and the hot airflow is used to flow into the containing cavity to heat the aerosol product; the outer side part is provided with a first air inlet channel, the first air inlet channel has an air inlet end and an air outlet end, the air inlet end is arranged on one side close to the opening, and the air outlet end is arranged on one side away from the opening; one end of the heating cavity is communicated with the air outlet end, and the other end is communicated with the containing cavity.

[0005] In one embodiment, the outer side part is provided with a plurality of first air inlet channels and a plurality of cooling cavities, each first air inlet channel is arranged at intervals along the circumference of the cup body, and at least one cooling cavity is arranged between each two adjacent first air inlet channels.

[0006] In one embodiment, the total contact area of the plurality of first air inlet channels and the outer wall of the heating cavity is greater than the total contact area of the plurality of cooling cavities and the outer wall of the heating cavity; and / or, the contact area of each first air inlet channel and the outer wall of the heating cavity is greater than the contact area of each cooling cavity and the outer wall of the heating cavity.

[0007] In an embodiment, each first air inlet channel has an axial cross-sectional area on the side adjacent to the central portion that is greater than an axial cross-sectional area on the side away from the central portion.

[0008] In an embodiment, the heating assembly further comprises a gas collecting member disposed in the heating cavity and on the side of the heat generating body facing the accommodating cavity, the gas collecting member is provided with a plurality of gas collecting holes, the diameter of the gas collecting hole on the side facing the heat generating body is greater than the diameter of the gas collecting hole on the side away from the heat generating body.

[0009] In an embodiment, the outer side wall of the gas collecting member is arranged along the inner wall of the heating cavity; and / or, a plurality of heating channels are arranged through the heat generating body; each gas collecting hole is arranged opposite to and communicates with a corresponding heating channel, and the heating channel communicates with the accommodating cavity through the corresponding gas collecting hole.

[0010] In an embodiment, the heat generating body comprises:

[0011] a heat conducting base provided with a plurality of heating channels;

[0012] a heat generating member, the heat generating member is in a mesh structure and is wrapped on the outer side wall of the heat conducting base in the circumferential direction.

[0013] In an embodiment, the heat generating member comprises:

[0014] a positive electrode circuit and a negative electrode circuit arranged at intervals in the axial direction of the heat conducting base;

[0015] and a heat generating pattern arranged between the positive electrode circuit and the negative electrode circuit, and one end of the heat generating pattern is connected to the positive electrode circuit and the other end is connected to the negative electrode circuit in the axial direction of the heat conducting base.

[0016] In an embodiment, the heat generating pattern comprises a plurality of groups of heat generating structures arranged in the circumferential direction of the heat conducting base in sequence, each group of heat generating structures is connected to the positive electrode circuit and the negative electrode circuit, and each group of heat generating structures comprises a plurality of heat generating units connected in sequence in the axial direction of the heat conducting base.

[0017] In an embodiment, a plurality of heating channels communicating with the accommodating cavity are arranged in the heat generating body, the outer periphery of the heat generating body is attached to the cavity wall of the heating cavity, the cup body is provided with a gas guiding cavity on the side of the heat generating body away from the accommodating cavity, the gas guiding cavity communicates with the heating channel and the first air inlet channel, and a flow guiding portion is arranged in the gas guiding cavity, the flow guiding portion is used to guide the air entering the gas guiding cavity from the first air inlet channel to the bottom of the heat generating body.

[0018] In an embodiment, the flow guiding portion is connected to the cavity wall of the gas guiding cavity away from the heat generating body, the flow guiding portion has a first flow guiding surface, and the first flow guiding surface is arranged obliquely towards the center of the bottom of the heat generating body; and / or, the orthographic projection of the first air inlet channel and the heating cavity is located in the gas guiding cavity, and the periphery of the gas guiding cavity has a second flow guiding surface connected to the first air inlet channel.

[0019] To solve the above technical problems, the present application provides an aerosol generating device, which comprises a mouthpiece and the heating assembly of any one of the above, the mouthpiece being capable of cooperating with the cup body to cover the aerosol article in the accommodation cavity.

[0020] The heating assembly of the present application can integrate the first air inlet channel, the heating cavity for heating the hot air flow, and the accommodation cavity for accommodating the aerosol article in the cup body. The heating assembly can be manufactured and installed as a single component. The first air inlet channel is formed in the cup body, so that no additional air inlet structure needs to be additionally arranged in the aerosol generating device, thereby reducing the number of parts and simplifying the structural design of the device. Compared with using different parts to respectively arrange the first air inlet channel, the heating cavity, and the accommodation cavity, the different parts will cause excessive parts and poor sealing if the different parts are connected to each other through a sealing member. The present application can integrate the first air inlet channel, the heating cavity, and the accommodation cavity in the central part and the outer side part of the cup body. The cup body has good sealing performance as a whole, thereby avoiding the problem that different parts need to be connected to each other through a sealing member. Therefore, the sealing member is less likely to be aged and poorly sealed, thereby improving the user's smoking experience. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 FIG. 1 is a perspective view of an aerosol generating device according to an embodiment of the present application (cover closed state);

[0022] Figure 2 FIG. 2 is a perspective view of an aerosol generating device according to another embodiment of the present application (cover open state);

[0023] Figure 3 FIG. 3 is a sectional view of an aerosol generating device according to an embodiment of the present application;

[0024] Figure 4 FIG. 4 is a structural view of a heating assembly and a mouthpiece according to an embodiment of the present application;

[0025] Figure 5 FIG. 5 is an exploded view of FIG. 4; Figure 4

[0026] Figure 6 FIG. 6 is a sectional view of FIG. 5; Figure 4

[0027] Figure 7 FIG. 7 is a structural view of a heating assembly according to an embodiment of the present application;

[0028] Figure 8 FIG. 8 is a longitudinal sectional view of FIG. 7; Figure 7

[0029] Figure 9 Figure 7 ​​​​a lateral cross-sectional view of the metal foil;

[0030] Figure 10 a schematic view of a structure of a metal foil in an embodiment of the present application;

[0031] Figure 11 a schematic view of a structure of a gas collecting member in an embodiment of the present application;

[0032] Figure 12 a schematic view of a structure of a heat generating body in an embodiment of the present application;

[0033] Figure 13 a schematic view of a structure of a heat generating body in another embodiment of the present application;

[0034] Figure 14 a schematic view of a structure of a heat generating body in still another embodiment of the present application;

[0035] Figure 15 a schematic view of a structure of a flow guiding portion in an embodiment of the present application;

[0036] Figure 16 a schematic view of a structure of a flow guiding portion in another embodiment of the present application;

[0037] Figure 17 a top view of a flow guiding portion in still another embodiment of the present application;

[0038] Figure 18 a cross-sectional view of a heating assembly provided in an embodiment of the present application;

[0039] Figure 19 a cross-sectional view of a heating assembly in another embodiment of the present application;

[0040] Figure 20 a cross-sectional view of a heating assembly in still another embodiment of the present application.

[0041] In the above-described drawings, arrow F1 represents a first direction, Figure 6 and the dotted arrow represents a gas flow direction.

[0042] Heating assembly 10, cup body 11, accommodating cavity 111, opening 1111, heating cavity 112, first air inlet channel 113, air inlet end 1131, air outlet end 1132, cooling cavity 114, shunt air duct 115, air guide cavity 116, flow guide part 1161, first flow guide surface 1162, second flow guide surface 1163, first boundary surface 117, support structure 118, heating body 12, heating channel 121, heat-conducting base 122, heating element 123, positive electrode circuit 1231, negative electrode circuit 1232, heating pattern 1233, heating structure 1234, heating unit 1235, connecting wire 1236, shell 20, cover 30, connecting piece 31, locking piece 32, suction nozzle 33, air outlet channel 331, through hole 332, cooling air duct 333, cooling structure 3331, second air inlet channel 334, air inlet hole 335, aerosol product 40, metal foil 50, one-way valve 60, air collecting piece 70, air collecting hole 71. DETAILED DESCRIPTION

[0043] The application will be further described in details through specific embodiments and with reference to the drawings. Similar elements in different embodiments are represented by similar reference numerals. In the following embodiments, many details are described in order to make the application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different cases, or can be replaced by other elements, materials or methods. In some cases, some operations related to the application are not shown or described in the specification in order to avoid the core part of the application being overwhelmed by too much description, and it is not necessary to describe these related operations in detail for those skilled in the art according to the description in the specification and general technical knowledge in the art.

[0044] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. Meanwhile, the steps or actions in the method description can also be sequentially adjusted or adjusted in a manner that is obvious to those skilled in the art. Therefore, the order in the specification and the drawings is only for the purpose of clearly describing a certain embodiment, and does not mean that it is the necessary order, unless otherwise stated that a certain order must be followed.

[0045] The serial numbers of components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and have no order or technical meaning. Unless otherwise specified, "connection" and "coupling" in this application include direct and indirect connection (coupling).

[0046] 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 indicative or suggestive of the devices or elements referred to necessarily having a specific orientation, being constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0047] Please refer to Figures 1-6 The present application provides an aerosol generating device. The aerosol generating device can be used to heat an aerosol article 40, wherein the aerosol article 40 is a solid aerosol article 40 processed or assembled into an aerosol article 40 having a predetermined shape or a bulk solid aerosol article 40. The aerosol article 40 can specifically include a plant smoking substrate, which can include tobacco or non-tobacco plants, such as tobacco powder or other plant powder or cut tobacco or plants mixed with a certain proportion of polyols, spices and adhesives, or natural plant cut tobacco or cut tobacco wrapped with a coating layer. In some embodiments, the aerosol article 40 can also have no coating layer, but be an integrated shaped body formed by punching or extrusion. The plant smoking substrate inside is in a fluffy and porous shape. When the plant smoking substrate is heated, aerosol can be generated and flow out from the pores in the plant smoking substrate. The aerosol article 40 can be a filterless and cooling section columnar smoking substrate.

[0048] As Figures 1-3 shown, the aerosol generating device includes a heating assembly 10, a housing 20, a cover 30, a circuit board (not shown), a battery (not shown) and an airflow sensor (not shown). The heating assembly 10 is used to heat the aerosol article 40 to generate aerosol.

[0049] As Figures 1-3 shown, the housing 20 and the cover 30 can be relatively rotated or moved, or the housing 20 and the cover 30 can be detachably connected. The cover 30 can be provided with a mouthpiece 33, and the mouthpiece 33 is provided with an air outlet passage 331. The aerosol generated by the aerosol article 40 can flow out from the air outlet passage 331 for the user to inhale. The heating assembly 10 is arranged inside the housing 20. In an embodiment, the heating assembly 10 is arranged on the side of the housing 20 close to the mouthpiece 33.

[0050] The circuit board and the battery are electrically connected with the heating assembly 10. The circuit board can be provided with a controller, which can control the heating temperature and mode of the heating assembly 10. The battery can supply power to the heating assembly 10. The airflow sensor is electrically connected with the controller. The airflow sensor is used to sense the user's inhaling action to generate an inhaling signal. The controller can control the heating assembly 10 to heat in response to the inhaling signal, or the controller can count the number of puffs according to the inhaling signal.

[0051] As shown in Figures 4-8 , the present application provides a heating assembly 10, which comprises a cup body 11 and a heating body 12. The cup body 11 is arranged in the shell 20 and located close to the suction nozzle 33. Wherein, the cup body 11 and the suction nozzle 33 can be oppositely arranged in the first direction, so as to be applied to the open cover type aerosol generating device. The first direction can be consistent with the axis direction of the cup body 11 and the axis direction of the suction nozzle 33.

[0052] The cup body 11 is provided with a center part and an outer part arranged outside the center part. Exemplarily, the center part is a cylindrical cavity, and the outer part is a tubular shape, which surrounds the outer periphery of the center part.

[0053] The center part is provided with a receiving cavity 111 and a heating cavity 112. The suction nozzle 33 can be matched with the cup body 11 to cover the aerosol product 40 in the receiving cavity 111. One end of the receiving cavity 111 is provided with an opening 1111, and the heating cavity 112 is arranged at the end of the receiving cavity 111 away from the opening 1111. The opening 1111 is used for loading the aerosol product 40 into the receiving cavity 111. That is, one end of the cup body 11 in the first direction is provided with the opening 1111, and the other end of the cup body 11 in the first direction is provided with a closed end. Corresponding to the cup body 11, the suction nozzle 33 is penetrated at both ends in the first direction and is provided with opposite through holes 332 and air outlet channels 331 in the first direction. The through holes 332 are arranged corresponding to the opening 1111 and face the cup body 11. When the cover 30 is buckled on the shell 20, the opening 1111 is arranged opposite to the through hole 332 on the cover 30, so that the aerosol generated by the aerosol product 40 in the receiving cavity 111 can enter the air outlet channel 331 of the suction nozzle 33 through the opening 1111 and the through hole 332. When the cover 30 is opened from the shell 20, the opening 1111 is exposed from the shell 20, so that the aerosol product 40 can be loaded into or taken out of the receiving cavity 111.

[0054] It should be noted that the shapes of the shell 20 and the cover 30 are not limited to Figure 1 and Figure 2 , and can be other shapes and structures according to specific use needs. The opening mode of the cover 30 is not limited to the flip opening shown in Figure 2 , that is, the cover 30 is rotationally connected with the shell 20 by rotating the connecting piece 31, so that the cover 30 is flipped to be opened to expose the cup body 11 in the shell 20. Of course, the cover 30 can also be opened in a sliding or rotating manner. In addition, as shown in Figure 1 and Figure 2 , a locking piece 32 matched with the cover 30 can also be arranged, so that the cover 30 can be locked by the locking piece 32 in the closed state, and the cover 30 can be freely moved and opened by mistake.

[0055] In one embodiment, the cup body 11 is made of one or more materials such as stainless steel, ceramic, copper, iron, and nickel. For example, the material of the cup body 11 may include stainless steel, ceramic, copper, iron, nickel, copper-nickel alloy, iron-nickel alloy, and copper-zinc alloy. Exemplarily, the material of the cup body 11 is copper-zinc alloy. An insulation layer (not shown) can be plated on the inner surface of the heating chamber 112 and the receiving chamber 111, that is, an insulation layer can be plated on the inner wall of the cup body 11. The insulation layer can be, for example, a ceramic layer, and the thickness of the insulation layer can be 0.01mm-0.08mm. The insulation layer can keep the temperature warm and prevent oil from sticking to the inner wall.

[0056] A heating element 12 is disposed within a heating chamber 112 to heat the gas flowing into the heating chamber 112 into a hot gas stream. The hot gas stream flows into a receiving cavity 111 to heat the aerosol product 40. The temperature of the hot gas stream is 120℃-350℃, the flow rate is 17.5mL / s-30mL / s, and the density is 0.65kg / m³. 3 -0.94kg / m 3 The cup body 11, the nozzle 33, and the heating element 12 are not limited to cylindrical structures; they can also adopt prismatic structures or other structural forms depending on the specific usage requirements.

[0057] like Figures 7-9 As shown, the outer portion is provided with a first air inlet channel 113, which extends approximately along the axial direction of the cup body 11. The first air inlet channel 113 has an air inlet end 1131 and an air outlet end 1132. The air inlet end 1131 is located on the side of the accommodating cavity 111 away from the heating cavity 112, that is, the air inlet end 1131 is located near the opening 1111, and the air outlet end 1132 is located on the side away from the opening 1111. One end of the heating cavity 112 is connected to the air outlet end 1132, and the other end is connected to the accommodating cavity 111. Airflow enters the first air inlet channel 113 from the air inlet end 1131 and flows into the heating cavity 112 from the air outlet end 1132. In the heating cavity 112, it is heated into a hot airflow and then enters the accommodating cavity 111 to heat the aerosol product 40.

[0058] The heating assembly 10 of the present application can integrate the first air inlet passage 113, the heating cavity 112 for heating the hot air flow, and the accommodation cavity 111 for accommodating the aerosol generating article 40 in the cup body 11. The heating assembly 10 can be manufactured and installed as a single component, and the first air inlet passage 113 is formed in the cup body 11. Therefore, there is no need to additionally provide an additional air inlet structure in the aerosol generating device, which reduces the number of parts and simplifies the structural design of the device. Compared with using different parts to separately provide the first air inlet passage 113, the heating cavity 112, and the accommodation cavity 111, different parts communicating with each space through a sealing member can cause excessive parts and poor sealing. In the present application, the central portion and the outer portion of the cup body 11 are designed to integrate the first air inlet passage 113, the heating cavity 112, and the accommodation cavity 111 in the central portion and the outer portion. The cup body 11 has good overall sealing performance, which avoids the problem that different parts need to communicate with the internal space through a sealing member. Therefore, the sealing member is less likely to age and cause poor sealing, and the user's smoking experience is improved.

[0059] As shown in FIG. 1, in an embodiment, the outer portion is provided with a plurality of first air inlet passages 113 and a plurality of cooling cavities 114. For example, the number of first air inlet passages 113 and cooling cavities 114 is greater than ten. Figure 9 Each first air inlet passage 113 is arranged at intervals along the circumferential direction of the cup body 11. At least one cooling cavity 114 is arranged between every two adjacent first air inlet passages 113. For example, as shown in FIG. 1, one cooling cavity 114 is arranged between every two adjacent first air inlet passages 113, that is, the first air inlet passages 113 and the cooling cavities 114 are alternately arranged along the circumferential direction of the outer portion. In other embodiments, two or more cooling cavities 114 can be arranged between every two adjacent first air inlet passages 113, and each cooling cavity 114 is also arranged at intervals along the circumferential direction of the outer portion. Figure 6

[0060] Further, specifically, in an embodiment, as shown in FIG. 1, the outer portion is provided with a plurality of first air inlet passages 113 and a plurality of cooling cavities 114. For example, the number of first air inlet passages 113 and cooling cavities 114 is greater than ten. Figures 4-6 ​As shown, the nozzle 33 also includes a cooling air passage 333 and a second air intake passage 334. The second air intake passage 334 surrounds the outer periphery of the cooling air passage 333. When the cover 30 is placed on the housing 20, one end of the cooling air passage 333 is connected to the receiving cavity 111, and the other end of the cooling air passage 333 is connected to the air outlet passage 331 of the nozzle 33. The second air intake passage 334 is connected to the external atmosphere and can be connected to the external atmosphere and the second air intake passage 334 by opening an air inlet 335 on the nozzle 33. When the cover 30 is fastened to the housing 20, the second air intake passage 334 of the nozzle 33 is connected to the air inlet end 1131 of the first air intake passage 113 of the cup body 11, and the cooling air passage 333 of the nozzle 33 is connected to the receiving cavity 111 of the cup body 11. When the user inhales at the nozzle 33, the airflow passes through the air inlet 335, the second air inlet channel 334, the first air inlet channel 113, and the heating chamber 112 in sequence before entering the accommodating chamber 111 and heating the aerosol product 40. The airflow then carries the aerosol generated by the aerosol product 40 into the cooling airway 333 for cooling, and finally flows out from the outlet channel 331.

[0061] Among them, such as Figure 6 In the example shown, at least one cooling structure 3331 is provided in the cooling air duct 333 for cooling the hot airflow. The cooling structure 3331 can take different structural forms, such as... Figure 6 The constricted structure shown in the diagram has a gradually decreasing ventilation area of ​​the cooling structure 3331 along the first direction away from the cup body 11, achieving a cooling effect on the hot airflow. Conversely, the end of the cooling structure 3331 facing the air outlet channel 331 is set as an open form with a gradually increasing ventilation area, reducing the flow velocity after the airflow passes through. When multi-stage cooling is required, multiple cooling structures 3331 can be spaced apart along the first direction within the cooling air channel 333 to meet actual cooling needs.

[0062] The aerosol generating apparatus and heating assembly 10 of this application have a first air inlet channel 113 and a cooling chamber 114 arranged outside the central accommodating cavity 111 and heating cavity 112. The heat transferred outward from the heating cavity 112 and accommodating cavity 111 can reach the first air inlet channel 113 to preheat the gas in the first air inlet channel 113. The gas in the first air inlet channel 113 is heated into a hot airflow through the heating cavity 112 and finally flows into the accommodating cavity 111 to heat the aerosol product 40. Therefore, the heat transferred outward from the heating cavity 112 and accommodating cavity 111 can also be used to heat the aerosol product 40, thus improving the energy utilization rate of the heating assembly 10. Generally, the airflow in the first air inlet channel 113 can be preheated to 50°C-100°C before entering the heating cavity 112 for further heating. Furthermore, the cooling chamber 114 provided outside the heating chamber 112 and the accommodating chamber 111 can reduce the heat dissipated from the cup body 11, retain the heat inside the heating component 10, prevent the aerosol generating device from getting too hot to handle, and prevent damage to other parts inside the aerosol generating device.

[0063] In one embodiment, such as Figure 9 As shown, the total contact area between the multiple first air intake channels 113 and the outer wall of the heating chamber 112 is greater than the total contact area between the multiple cooling chambers 114 and the outer wall of the heating chamber 112, and / or, the contact area between each second air intake channel 334 and the outer wall of the heating chamber 112 is greater than the contact area between each cooling chamber 114 and the outer wall of the heating chamber 112. With this structure, most of the heat dissipated from the outer wall of the heating chamber 112 will enter the first air intake channel 113, and a small portion of the heat will enter the cooling chamber 114. This allows most of the dissipated heat to be used to preheat the gas in the first air intake channel 113, thereby improving the energy utilization rate of the heating assembly 10. Meanwhile, the cooling chamber 114 can retain the small portion of heat that does not enter the first air intake channel 113 within the heating assembly 10, preventing further heat dissipation to the outside of the cup body 11. Furthermore, the total contact area between the plurality of first air intake channels 113 and the outer wall of the accommodating cavity 111 is greater than the total contact area between the plurality of cooling cavities 114 and the outer wall of the accommodating cavity 111, and / or, the contact area between each second air intake channel 334 and the outer wall of the accommodating cavity 111 is greater than the contact area between each cooling cavity 114 and the outer wall of the accommodating cavity 111.

[0064] In an embodiment, the outer wall of the cooling cavity 114 and the heating cavity 112 is in line contact, that is, the profiles of the outer wall of the heating cavity 112 contacted by two adjacent first air inlet channels 113 are connected by a connecting line 1236, so that the outer wall of the heating cavity 112 is in surface contact with the first air inlet channel 113, and the outer wall of the heating cavity 112 is in line contact with the cooling cavity 114. Thus, the contact area of the outer wall of the heating cavity 112 and the first air inlet channel 113 is larger than the contact area of the outer wall of the heating cavity 112 and the cooling cavity 114, so as to improve the energy utilization rate of the heating assembly 10 and reduce heat loss. In other embodiments, the outer wall of the cooling cavity 114 and the heating cavity 112 can also be in surface contact, that is, the profiles of the outer wall of the heating cavity 112 contacted by two adjacent first air inlet channels 113 are arranged at intervals. It is only necessary to ensure that the surface contact area of the outer wall of the heating cavity 112 and the cooling cavity 114 is smaller than the surface contact area of the outer wall of the heating cavity 112 and the first air inlet channel 113. Increasing the contact area of the outer wall of the heating cavity 112 and the cooling cavity 114 can improve the heat preservation effect inside the cup body 11 and reduce the proportion of heat dissipation to the outside of the cup body 11. Further, the outer wall of the cooling cavity 114 and the accommodation cavity 111 can be in line contact, or the outer wall of the cooling cavity 114 and the accommodation cavity 111 can be in surface contact.

[0065] In an embodiment, the axial cross-sectional area of each first air inlet channel 113 adjacent to the side where the central portion is located is larger than the axial cross-sectional area of the first air inlet channel 113 away from the side where the central portion is located, that is, the inner diameter of the first air inlet channel 113 gradually decreases from inside to outside. Specifically, the inner diameter of the first air inlet channel 113 can be 0.1mm-2mm. In an embodiment, the axial cross-sectional area of the first air inlet channel 113 gradually decreases from the side close to the central portion to the side away from the central portion, that is, the inner diameter of the first air inlet channel 113 gradually decreases from inside to outside. Since the inner diameter of the inner side of the first air inlet channel 113 is relatively large, the heat dissipated from the outer wall of the heating cavity 112 can be preferentially used to enter the first air inlet channel 113 to heat the gas in the first air inlet channel 113, thereby improving the utilization rate of heat in the heating cavity 112. When the heat in the first air inlet channel 113 further dissipates to the outside of the first air inlet channel 113, since the inner diameter of the outer side of the first air inlet channel 113 is relatively small, the contact area of the first air inlet channel 113 and the outermost wall of the cup body 11 is small, and the heat dissipated from the first air inlet channel 113 to the outside of the cup body 11 is also small, thereby reducing the proportion of heat dissipation to the outside of the cup body 11. Further, the axial cross-sectional area of each cooling cavity 114 adjacent to the side where the central portion is located is smaller than the axial cross-sectional area of the cooling cavity 114 away from the side where the central portion is located, that is, the inner diameter of the cooling cavity 114 gradually increases from inside to outside, so as to further improve the heat preservation effect inside the cup body 11.

[0066] In an embodiment, the interface between the plurality of first air inlets 113 and the plurality of cooling cavities 114 can be wavy or zigzag, and specifically, the radial cross-section of a single first air inlet 113 and a single cooling cavity 114 can be approximately triangular, semicircular, rectangular, or the like.

[0067] In an embodiment, the cooling cavity 114 extends at least to the radial outer side of the heating cavity 112. Since the heating cavity 112 is the cavity with the highest temperature inside the cup 11, arranging the cooling cavity 114 radially outside the heating cavity 112 can prevent the heat in the high-temperature zone from dissipating from the cup 11. For example, the cooling cavity 114 extends from the side of the outer portion close to the opening 1111 of the accommodation cavity 111 to the side of the outer portion far from the opening 1111, so that the cooling cavity 114 can keep the heat dissipated outward by the accommodation cavity 111.

[0068] In an embodiment, the cooling cavity 114 is a closed cavity, and a vacuum cavity can be formed in the cooling cavity 114, and the cooling cavity 114 and the outside of the cup 11 form a pressure difference of -30 bar to -10 bar. Alternatively, the cooling cavity 114 can be filled with a heat-insulating filler, a cooling medium, or a heat-dissipating material, for example, at least one cooling cavity 114 can be filled with aerogel, or as shown in Figure 10 At least one cooling cavity 114 is provided with a metal foil 50 folded multiple times and superimposed, and the metal foil 50 folded multiple times has a large area for absorbing heat, thereby reducing the proportion of heat dissipated to the outside of the cooling cavity 114.

[0069] In an embodiment, as shown in Figure 6 A shunt air passage 115 leading from the second air inlet 334 to the cooling air passage 333 can be arranged at the connection between the shell 20 and the mouthpiece 33, and the shunt air passage 115 can allow external normal-temperature air to enter the cooling air passage 333 when the user inhales, and the normal-temperature air can mix with the aerosol flowing out of the accommodation cavity 111 and cool the aerosol. In addition, the shunt air passage 115 can be further provided with a one-way valve 60 (as shown in Figure 7 and Figure 8The one-way valve 60 may be a Tesla valve, for example. The total flow of gas to all the branch air passages 115 may be no greater than the total flow of gas to the heat-generating body 12, so as to ensure that the aerosol can be drawn at the suction port 33. That is, the airflow can flow from the second air inlet passage 334 to the temperature-reducing air passage 333, but cannot flow from the temperature-reducing air passage 333 to the second air inlet passage 334, so that the cold air can mix with the aerosol to reduce the temperature of the aerosol and dilute the aerosol, preventing the aerosol from being too hot to burn the mouth, and the one-way valve 60 can also prevent the aerosol from flowing to the second air inlet passage 334. The airflow in the second air inlet passage 334 is branched 10%-50% at the branch air passage 115, and the flow rate of the gas in the one-way valve 60 is, for example, 17.5 mL / s-30 mL / s. The dilution ratio of the aerosol to air is 1:2-1:1, and the temperature of the aerosol can be reduced from 175°C to 80°C at the outlet of the one-way valve 60. The branch air passage 115 can be arranged on the suction port 33, or on the housing 20, or on both the suction port 33 and the housing 20, and the suction port 33 and the housing 20 jointly enclose the branch air passage 115. For example, the one-way valve 60 can be arranged on the suction port 33, or on the housing 20, or one half of the one-way valve 60 is arranged on the suction port 33 and the other half is arranged on the housing 20, and when the suction port 33 and the housing 20 are connected, the two halves of the one-way valve 60 are spliced together to form a complete one-way valve 60.

[0070] As shown in Figure 8 and Figure 11 , in an embodiment, the heating assembly 10 further comprises a gas collecting member 70. The gas collecting member 70 is arranged in the heating cavity 112 and on the side of the heat-generating body 12 facing the accommodating cavity 111, for increasing the flow rate of the hot airflow after passing through the gas collecting member 70. The heating assembly 10 provided in the present application can increase the flow rate of the hot airflow after passing through the gas collecting member 70, so that the flow of the hot airflow in the accommodating cavity 111 per unit time is greater, and the overall heating efficiency of the hot airflow on the aerosol product 40 is higher, so that the heating is more sufficient, the heating effect is better, and the amount of the generated aerosol is more, preventing waste of the substrate material and meeting the needs of the user to smoke a large amount of aerosol in a short time.

[0071] In an embodiment, as shown in Figure 8 and Figure 11 , a plurality of gas collecting holes 71 are formed in the gas collecting member 70, and the plurality of gas collecting holes 71 means that the number of the gas collecting holes 71 is at least two. The diameter of the side of the gas collecting hole 71 facing the heat-generating body 12 is greater than the diameter of the side of the gas collecting hole 71 facing away from the heat-generating body 12, that is, when the airflow flows from the side of the gas collecting hole 71 close to the heat-generating body 12 to the side of the gas collecting hole 71 away from the heat-generating body 12, the flow rate of the airflow will increase due to the decrease in the diameter of the gas collecting hole 71, so as to increase the speed of the hot airflow flowing into the accommodating cavity 111.

[0072] In an embodiment, the diameter of each gas collecting hole 71 changes linearly, i.e. the diameter of each gas collecting hole 71 changes gradually, so that the flow rate of the gas flow changes uniformly. In other embodiments, the diameter of each gas collecting hole 71 can also change in a curve shape, or the diameter of each gas collecting hole 71 can change abruptly, or the diameter of each gas collecting hole 71 can have at least one of linear change, curve change, and abrupt change.

[0073] In an embodiment, the ratio of the diameter of each gas collecting hole 71 on the side away from the heat generating body 12 to the diameter of each gas collecting hole 71 on the side facing the heat generating body 12 is 1:5-1:2. By controlling the ratio, the degree of acceleration of the hot gas flow can be controlled. When the length of the hole is the same, the smaller the ratio, the faster the hot gas flow accelerates, and the higher the heating efficiency of the hot gas flow can be.

[0074] In an embodiment, the radial cross section of each gas collecting hole 71 is circular, triangular, or polygonal.

[0075] In an embodiment, each gas collecting hole 71 is arranged uniformly in the circumferential direction and the radial direction of the gas collecting member 70, so that the hot gas flow is uniformly accelerated in the radial direction and the circumferential direction to the accommodation cavity 111.

[0076] In an embodiment, the gas collecting member 70 can be a heat conductive material, for example, a metal or a ceramic with good heat conduction performance. By setting the gas collecting member 70 as a heat conductive material, the gas collecting member 70 can also transfer a portion of the heat from the heating cavity 112 to the accommodation cavity 111, to improve the heating efficiency of the aerosol generating article 40.

[0077] As shown in FIG. 1, Figure 8 In an embodiment, the outer side wall of the gas collecting member 70 is arranged closely around the inner wall of the heating cavity 112, i.e. the outer side wall of the gas collecting member 70 is arranged closely around the inner wall of the cup body 11. In this way, the hot gas flow can be prevented from passing through the gap between the outer side wall of the gas collecting member 70 and the inner wall of the heating cavity 112, and the hot gas flow can be ensured to pass through the gas collecting holes 71 of the gas collecting member 70, to achieve accurate guidance and uniform heating of the hot gas flow, and to avoid local burning of the aerosol generating article 40.

[0078] In an embodiment, the air collecting member 70 is arranged on the heat generating body 12, and the heat generating body 12 is provided with a plurality of heating channels 121 penetrating therethrough, wherein the heating channels 121 can penetrate in the first direction. After the airflow enters the central portion through the first air inlet channel 113, the airflow flows to the accommodating cavity 111 through the heating channels 121, and the airflow is heated to form a hot airflow while passing through the heating channels 121. The hot airflow enters the accommodating cavity 111 to heat the aerosol product 40 to generate a corresponding aerosol. Each air collecting hole 71 is arranged opposite to and communicates with a corresponding heating channel 121, and the heating channel 121 communicates with the accommodating cavity 111 through the corresponding air collecting hole 71. For example, the number of air collecting holes 71 is the same as and corresponds to the number of heating channels 121. By connecting the air collecting hole 71 with the heating channel 121, each air collecting hole 71 can accelerate the airflow in each heating channel 121 to achieve accurate guidance and uniform heating of the hot airflow.

[0079] It can be understood that in some aerosol generating devices, if the heat generating element is arranged on the outer wall or the bottom wall of the cup body, and the airflow is heated by the cup body, the heat conduction effect of the cup body is difficult to effectively improve, and the airflows in different air inlet channels collide with each other after entering the cup body, which is easy to cause airflow turbulence. After the airflow is heated, a large temperature difference is easy to occur, which leads to uneven heating of the aerosol product.

[0080] In the heating assembly 10 in the embodiment, by improving and optimizing the structure, the heat generating body 12 with a plurality of heating channels 121 is arranged in the cup body 11, so that the gas passing through the heating channels 121 is heated to form a hot airflow, and then the aerosol product 40 in the accommodating cavity 111 is penetrated and heated. This can effectively alleviate the airflow turbulence, balance the temperature difference in different areas, alleviate the problem of uneven heating, and is beneficial to improve the heating effect of the aerosol product 40.

[0081] In actual application, since the airflow passing through the heating channels 121 can be heated by the heat generating body 12 to form a hot airflow in the embodiment, the heat generating body 12 can be in contact with the bottom of the aerosol product 40 when the air collecting member 70 is not arranged, or a gap can be arranged between the heat generating body 12 and the bottom of the aerosol product 40 when the air collecting member 70 is arranged. Both of the two ways can achieve the heating effect of the aerosol product 40.

[0082] For example, the periphery of the heat generating body 12 can be in contact with the inner wall of the heating cavity 112, and the periphery of the aerosol product 40 can be in contact with or have a small gap with the inner wall of the cup body 11, so that the hot airflow can pass through the aerosol product 40 as much as possible to heat.

[0083] For example, the heat generating body 12 can be arranged on the inner wall of the heating cavity 112, and the periphery of the heat generating body 12 can be in contact with the inner wall of the heating cavity 112. Figures 12-14As shown, in an embodiment, the heating body 12 includes a heat-conducting base 122 and a heating element 123. The heat-conducting base 122 has a plurality of heating channels 121 penetrating through the heat-conducting base 122 along a first direction, and each of the heating channels 121 penetrates through the heat-conducting base 122 along the first direction. The heating element 123 is in a mesh structure and circumferentially covers an outer sidewall of the heat-conducting base 122. The heating element 123 is electrically connected to the battery to generate heat in an energized state and supply heat to the heat-conducting base 122. By arranging the heating element 123 in a mesh structure, on one hand, the coverage of the heating element 123 can be expanded and the material can be saved, and on the other hand, the heat conduction can be promoted and the energy consumption can be reduced. The airflow can pass through the heat-conducting base 122 through different heating channels 121 and be heated to form hot airflow at the same time to heat the aerosol product 40 in the accommodation cavity 111.

[0084] Further, as an example in Figures 12-14 , the heating element 123 includes a positive electrode circuit 1231, a negative electrode circuit 1232, and a heating pattern 1233. The positive electrode circuit 1231 and the negative electrode circuit 1232 are arranged at intervals in the axial direction of the heat-conducting base 122, and the heating pattern 1233 is located between the positive electrode circuit 1231 and the negative electrode circuit 1232. One end of the heating pattern 1233 is connected to the positive electrode circuit 1231 and the other end of the heating pattern 1233 is connected to the negative electrode circuit 1232 in the axial direction of the heat-conducting base 122 to form the heating element 123 in a mesh structure. In application, the positive electrode circuit 1231 and the negative electrode circuit 1232 can be electrically connected to the battery to form an energized circuit of the heating element 123 to generate heat for the heating pattern 1233. The positive electrode circuit 1231 and the negative electrode circuit 1232 can adopt the circuit structure shown in Figure 12 , and the spacing therebetween and the shape of the heating pattern 1233 can be set according to different heating requirements.

[0085] Further, in a specific implementation, as an example in Figures 12-14 , the heating pattern 1233 includes a plurality of groups of heating structures 1234 arranged in sequence in the circumferential direction. Each group of heating structures 1234 is connected to the positive electrode circuit 1231 and the negative electrode circuit 1232, and each group of heating structures 1234 includes a plurality of heating units 1235 connected in sequence in the axial direction of the heat-conducting base 122. One heating unit 1235 adjacent to the positive electrode circuit 1231 in the axial direction of the heat-conducting base 122 is connected to the positive electrode circuit 1231, and one heating unit 1235 adjacent to the negative electrode circuit 1232 in the axial direction of the heat-conducting base 122 is connected to the negative electrode circuit 1232 to form the heating element 123 in a mesh structure. It should be noted that the number of groups of heating structures 1234 and the number of heating units 1235 in each group can be set according to the specific size of the heating base. The heating unit 1235 is not limited to the shape shown in Figures 12 to 14 , and other shapes can also be used.

[0086] Further, as shown in the examples of Figure 13 , at least one group of the plurality of heat generating structures 1234 is arranged at intervals in the circumferential direction, that is, there is a certain interval between the at least one group of heat generating structures 1234 and other heat generating structures 1234 adjacent in the circumferential direction, and the two are not in direct contact, so that the heat generating structure 1234 and the other heat generating structure 1234 form a parallel relationship.

[0087] Further, as shown in the examples of Figure 14 , the heat generating pattern 1233 further includes a connecting line 1236 located between at least two adjacent groups of heat generating structures 1234, and the two ends of the connecting line 1236 are connected to the positive electrode line 1231 and the negative electrode line 1232, respectively, such as the connecting line 1236 extending axially along the heat-conducting base 122 shown in Figure 14 ; adjacent heat generating structures 1234 can be connected to the connecting line 1236 to connect the adjacent heat generating structures 1234 in the circumferential direction as a whole.

[0088] In further embodiments of the present application, as shown in the examples of Figures 12 to 14 , each heat generating unit 1235 of the heat generating pattern 1233 is a hollow structure, which can further reduce power consumption and improve heat generating temperature. Among them, the heat generating unit 1235 can adopt a closed pattern, such as the elliptical structure shown in Figure 12 , or a circular structure, of course, the heat generating unit 1235 can also adopt a non-closed structure, such as the X-shaped structure shown in Figure 12 and Figure 12 .

[0089] Further, the heat generating member 123 can specifically adopt the form of a flexible printed circuit to be connected to the outer side wall of the heat-conducting base 122 in a printed manner and form an integrated structure.

[0090] In further embodiments of the present application, as shown in the examples of Figures 12 to 14 , the plurality of heating channels 121 on the heat-conducting base 122 are arranged in an array relative to the central axis of the heat-conducting base 122, so that the arrangement of the plurality of heating channels 121 is more uniform, and the hot gas flow generated by the gas passing through the plurality of heating channels 121 is more uniformly distributed. Among them, the heating channels 121 can be arranged in a ring array, such as shown in Figures 12 to 14 , to form a plurality of annularly arranged concentric circles, so as to further increase the number of heating channels 121 in a limited space and improve the heating efficiency. It should be noted that the arrangement form of the heating channels 121 is not limited to the ring array shown in Figures 12 to 14 , but can also be arranged in a matrix form, and the arrangement form is adapted to the shape of the heat-conducting base 122. For example, when the heat-conducting base 122 adopts a shape such as Figures 18-20As shown in the cylindrical structure in the middle, the heating channels 121 are arranged in the form of a ring array when the heat-conducting base 122 is in the shape of a cube or cuboid, which is conducive to further improving the space utilization, increasing the number of heating channels 121, and making the distribution of the heating channels 121 more uniform.

[0091] In a further embodiment of the present application, as shown in Figure 15 The porosity of the heat-conducting base 122 is set to 20% to 85%, that is, the total volume of all the heating channels 121 accounts for 20% to 85% of the volume of the three-dimensional space formed by the heat-conducting base 122. Further, the porosity can be set to a range of 25% to 80%, for example, 60%, 65%, 70%, 75%, which can effectively balance the structural requirements of the heat-conducting base 122 and the heating requirements. In actual application, different numbers of heating channels 121 can be set according to the specific size of the heat-conducting base 122 to meet the above porosity requirements.

[0092] In a further embodiment of the present application, as shown in Figure 18 In the heat-conducting base 122, the ratio of the total volume of all the heating channels 121 to the volume of the heat-conducting base 122 is in the range of 1:5.5 to 1:1.5 (including both end point values), wherein the volume of the heat-conducting base 122 specifically refers to the solid volume (i.e., the volume of the solid excluding the heating channels 121). Further, the above volume ratio is in the range of 1:5 to 1:2, for example, 1:4.5, 1:4, 1:3.5, 1:3, 1:2.5, which can meet the structural requirements of the heat-conducting base 122 while meeting the heating requirements. Specifically, different numbers of heating channels 121 can be set according to the specific size of the heat-conducting base 122 to meet the above volume ratio requirements.

[0093] Further, in a specific example, as shown in Figure 15The total number of the heating channels 121 can be 2N, where N is a positive integer; the aperture size of the heating channels 121 can be set in the range of 0.1 mm to 1 mm; the shape of the heating channels 121 can be a circular hole as shown in the figure, of course, it can also be a square hole or other types of holes according to the needs, for example, a regular polygon hole, and different shapes of heating channels 121 can also be set according to the needs, that is, a plurality of heating channels 121 include two or more combinations of the above-mentioned different shapes of holes. For example, in one example, a plurality of heating channels 121 are arranged in a ring array, the heating channels 121 located in the outer circle are circular holes, and the heating channels 121 located in the inner circle are square holes. Through the above-mentioned setting, the limited space of the heat-conducting base 122 can be fully utilized, the number of heating channels 121 can be increased, and the arrangement of the heating channels 121 can be more uniform, so as to further increase the flow of the generated hot air and enhance the heating effect.

[0094] As shown in Figure 16 , the outer periphery of the heating element 12 is attached to the cavity wall of the heating cavity 112, and the cup body 11 is provided with a gas guide cavity 116 on the side away from the accommodating cavity 111. The gas guide cavity 116 is provided with a flow guide part 1161, which is used to guide the air entering the gas guide cavity 116 from the first air inlet channel 113 to the bottom of the heating element 12, so that the air flow can pass through the heating channels 121 of the heating element 12.

[0095] It can be understood that the first air inlet channel 113 is relatively close to the outer side edge of the gas guide cavity 116, and the air flow needs to change direction when entering the gas guide cavity 116. Especially when the gas enters from different directions around the gas guide cavity 116, it is easy to cause mutual impact and cause the phenomenon of multi-edge air flow disorder, and also causes the difference in air flow amount of the heating channels 121 in different areas of the heating element 12, resulting in large temperature difference of the hot air flow after heating, causing uneven heating.

[0096] The heating assembly 10 in the embodiment improves and optimizes the structure to separate and guide the gas flowing into the gas guide cavity 116 from the first air inlet channel 113 by using the flow guide part 1161 in the gas guide cavity 116, so that the gas in different directions flows to the heating element 12 more smoothly, preventing the phenomenon of air flow disorder, and the air flow can pass through the heating channels 121 in different areas of the heating element 12 more uniformly, thereby improving the problem of large temperature difference of the hot air flow in different areas and uneven heating, and improving the heating effect on the aerosol generating article 40.

[0097] As shown in Figure 15 and Figure 16As shown, in the air guide cavity 116, the flow guide portion 1161 is connected to the bottom wall of the air guide cavity 116 away from the heat generating body 12, so as to block the air flow from flowing in the lateral direction through the flow guide portion 1161, so that the air flows in different directions are separated from each other; wherein the flow guide portion 1161 has a first flow guide surface 1162, which is inclinedly arranged towards the bottom center line of the heat generating body 12, so as to guide the air flow, so that when the air flow flows in the lateral direction to the flow guide portion 1161 after entering the air guide cavity 116 through the first air inlet channel 113, the air flow can change the flow direction under the guidance of the first flow guide surface 1162, and is diverted to the first direction close to the bottom of the heat generating body 12, and then passes through different heating channels 121 on the heat generating body 12, and generates hot air flow after being heated. It can be understood that the air flow is prone to impact when encountering obstacles during movement, and is prone to air flow turbulence. The first flow guide surface 1162 can guide the air flow to change the movement direction more gently, which is beneficial to reduce air flow impact, prevent air flow turbulence, and make the air flow cover the bottom surface of the heat generating body 12 more uniformly, so that the air flow distribution of different heating channels 121 is more uniform.

[0098] Among them, different forms of first flow guide surface 1162 can be set according to actual use requirements.

[0099] In a specific implementation mode, as shown in the examples in Figures 15 to 16 and Figure 15 , the first flow guide surface 1162 adopts a smooth curved surface structure to enhance the flow guiding effect, so that the air flow moves more gently under the guidance of the first flow guide surface 1162, and at the same time can expand the coverage range of the first flow guide surface 1162 and guide the air flow in different directions. Specifically, the first flow guide surface 1162 can adopt a structure as shown in Figure 17 , which is a straight line in the longitudinal cross section, or can adopt a curved line as shown in Figure 17 , which is concave in the longitudinal cross section, so that the first flow guide surface 1162 is smoother, further enhancing the stability when guiding the air flow.

[0100] Further, in a specific example, as shown in Figure 18 , the first flow guide surface 1162 is a continuous structure extending in the circumferential direction, that is, there is no discontinuous or protruding structure in the circumferential direction, so as to guide the air flow in any direction in the circumferential direction, thereby increasing the flow guiding coverage range in the circumferential direction.

[0101] Further, as shown in Figure 18In the example, the flow guide 1161 specifically adopts a frustum-shaped structure. The first flow guide surface 1162 is a circular inclined surface in the circumferential direction. The distance from the center line of the flow guide 1161 at any position in the circumferential direction is equal, so it can play a flow guiding role in any direction in the circumferential direction. Moreover, the airflow in different directions is more evenly distributed after being guided by the first flow guide surface 1162, which is conducive to further improving the flow guiding effect.

[0102] In another specific implementation, such as Figure 18 In the example shown, the first guide surface 1162 adopts an inclined planar structure. The guide portion 1161 has multiple different first guide surfaces 1162 in the circumferential direction. The same first guide surface 1162 has the same inclination angle relative to the inner wall surface of the air guide cavity 116. In the direction along the first direction close to the heating element 12, each first guide surface 1162 is inclined towards the bottom centerline of the heating element 12, which can also achieve the function of guiding the airflow. The guide portion 1161 can also adopt a structural form adapted to the shape of the first guide surface 1162, for example... Figure 18 The truncated pyramid structure shown has four first guide surfaces 1162. Of course, other numbers of first guide surfaces 1162 can also be set, depending on the actual usage requirements.

[0103] In further embodiments of this application, such as Figure 19 As shown, in the first direction, there is a first distance H between the guide section 1161 and the heating element 12, so that space is reserved between the guide section 1161 and the heating element 12 for the lateral movement of airflow. After the airflow is guided by the guide section 1161, it can generate lateral movement on the air intake side of the heating element 12, so that the airflow can enter different heating channels 121, which is beneficial to improving the uniformity of airflow distribution.

[0104] Furthermore, such as Figure 19In the example, the interface between the walls of the air guide cavity 116 and the heating cavity 112 in the first direction is the first interface 117, meaning that the air guide cavity 116 and the heating cavity 112 are connected at the first interface 117. In the first direction, the wall of the heating cavity 112 extends to the first interface 117 and has a first gap h1 between it and the bottom wall of the air guide cavity 116 away from the heating cavity 112. The first air intake channel 113 communicates with the air guide cavity 116 through the first gap h1, allowing airflow in the first air intake channel 113 to smoothly enter the air guide cavity 116. Correspondingly, in the first direction, the bottom surface of the heating element 12 is higher than the bottom surface of the wall of the heating cavity 112, meaning that a second gap h2 exists between the bottom surface of the heating element 12 and the first interface 117. It is understandable that when the gas in the air guide cavity 116 flows to the bottom surface of the heating element 12 under the guidance of the flow guide 1161, some of the airflow will inevitably flow laterally to the cavity wall of the heating cavity 112. Due to the existence of the second gap h2, the airflow flowing to the cavity wall of the heating cavity 112 can be further guided, so that the airflow turns and flows back to the air guide cavity 116, so as to prevent the airflow from flowing back to the first air intake channel 113, which helps to prevent the phenomenon of airflow turbulence in the first air intake channel 113.

[0105] In further embodiments of this application, such as Figure 20 In the example shown, the inner wall of the heating chamber 112 has a support structure 118, which protrudes towards the central axis of the cup body 11. The periphery of the heating element 12 is supported on the support structure 118, which provides support for the heating element 12. Specifically, the support structure 118 is located at one end of the heating chamber 112 near the air guide cavity 116. The support structure 118 can specifically adopt a design such as... ​ The support block shown is in the form of a support block, and multiple support blocks are spaced apart in the circumferential direction of the heating cavity 112 to form multi-point support for the heating element 12; or, the support structure 118 can also be set as a continuous structure extending in the circumferential direction, so that a step-like structure is formed in the heating cavity 112, which can increase the contact area with the heating element 12 and make the support more stable.

[0106] In further embodiments of this application, such as ​ In the example shown, in the cup body 11, the radial dimension of the heating cavity 112 gradually decreases towards the air guide cavity 116 along the first direction. That is, part or all of the heating cavity 112 forms a funnel-shaped constricted structure, so that at least a portion of the cavity wall of the heating cavity 112 is inclined. The heating element 12 is disposed within the heating cavity 112 so that the cavity wall of the heating cavity 112 can support the heating element 12. The inclination angle of the cavity wall of the heating cavity 112 can be set according to the central portion and the specific dimensions of the heating element 12.

[0107] In a further embodiment of the present application, the first air inlet channel 113 and the orthographic projection (projection on the radial projection plane) of the heat generating body 12 are located entirely on the inner side of the air guide cavity 116 on the radial projection plane, that is, the coverage area of the end of the air guide cavity 116 facing the heat generating body 12 is greater than the cross-sectional area of the heating cavity 112, and the air guide cavity 116 can completely cover all the heating channels 121 on the heat generating body 12, so that the air flow is guided and turned to flow in the first direction through the flow guide part 1161, avoiding other shielding structures, and facilitating to improve the air flow passability. Wherein, the periphery of the air guide cavity 116 has a second flow guide surface 1163 connected to the first air inlet channel 113, so that when the air flow enters the air guide cavity 116 from the first air inlet channel 113, it can flow to the flow guide part 1161 along the lateral direction under the flow guiding effect of the second flow guide surface 1163. It can be understood that when the air flow enters the air guide cavity 116 from the first air inlet channel 113 along the first direction, it contacts the bottom wall of the air guide cavity 116 and changes the flow direction, and by providing the second flow guide surface 1163, the air guide effect can be achieved at the connection between the air guide cavity 116 and the first air inlet channel 113, so that the air flow flows to the flow guide part 1161 more smoothly and smoothly.

[0108] Further, in actual application, the second flow guide surface 1163 can adopt the inclined plane structure as shown in ​ , of course, the second flow guide surface 1163 can also adopt the curved surface structure as shown in ​ , or other structure forms according to specific use requirements, which will not be repeated here.

[0109] The present application also provides an aerosol generating system, which comprises an aerosol generating device and an aerosol generating article 40, the aerosol generating article 40 is loaded into the aerosol generating device, and the aerosol generating device can heat the aerosol generating article 40 to generate aerosol.

[0110] The above uses specific examples to illustrate the present application, which is only used to help understand the present application 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, characterized by, The cup body is internally provided with a central portion and an outer portion arranged outside the central portion, the central portion has a receiving cavity for accommodating an aerosol product and a heating cavity, one end of the receiving cavity has an opening for loading the aerosol product into the receiving cavity, and a heating body is arranged in the heating cavity, the heating body is used for heating the airflow flowing into the heating cavity into a hot airflow, and the hot airflow is used for flowing into the receiving cavity to heat the aerosol product. The outer portion is provided with a first air inlet channel having an air inlet end arranged near the opening and an air outlet end arranged away from the opening, one end of the heating cavity is communicated with the air outlet end, and the other end of the heating cavity is communicated with the receiving cavity. The outer portion is provided with a plurality of first air inlet channels and a plurality of cooling cavities, each first air inlet channel is arranged in a circumferential direction of the cup body, and at least one cooling cavity is arranged between every two adjacent first air inlet channels. The total contact area of the plurality of first air inlet channels and the outer wall of the heating cavity is greater than the total contact area of the plurality of cooling cavities and the outer wall of the heating cavity, and / or the contact area of each first air inlet channel and the outer wall of the heating cavity is greater than the contact area of each cooling cavity and the outer wall of the heating cavity.

2. The heating assembly of claim 1, wherein, The axial cross-sectional area of each first air inlet channel near the side where the central portion is located is greater than the axial cross-sectional area of the first air inlet channel away from the side where the central portion is located.

3. The heating assembly of claim 2, wherein, The heating assembly further comprises a gas collecting member arranged in the heating cavity and arranged on the side of the heating body facing the receiving cavity, a plurality of gas collecting holes are formed in the gas collecting member, and the hole diameter of the gas collecting hole facing the side of the heating body is greater than the hole diameter of the side away from the heating body.

4. The heating assembly of claim 2, wherein, The outer side wall of the gas collecting member is arranged in close contact with the inner wall of the heating cavity, and / or a plurality of heating channels are arranged through the heating body, each gas collecting hole is arranged opposite to and communicated with the corresponding heating channel, and the heating channel is communicated with the receiving cavity through the corresponding gas collecting hole.

5. The heating assembly of claim 1, wherein, The heating body comprises:

6. The heating assembly of claim 5, wherein, a heat-conducting base body having a plurality of heating channels formed therein; 7. The heating assembly according to any one of claims 1 to 6, characterized in that a heating member in a mesh structure, the heating member being wrapped on the outer side wall of the heat-conducting base body in a circumferential direction. The heating member comprises: a positive electrode circuit and a negative electrode circuit arranged in an axial direction of the heat-conducting base body; 8. The heating assembly of claim 7, wherein, and a heating pattern arranged between the positive electrode circuit and the negative electrode circuit, one end of the heating pattern being connected to the positive electrode circuit and the other end of the heating pattern being connected to the negative electrode circuit in the axial direction of the heat-conducting base body. The heating pattern comprises a plurality of groups of heating structures arranged in a circumferential direction of the heat-conducting base body, each group of heating structures being connected to the positive electrode circuit and the negative electrode circuit, and each group of heating structures comprising a plurality of heating units connected in an axial direction of the heat-conducting base body. ​ 9. The heating assembly of claim 8, wherein, ​ 10. The heating assembly according to any one of claims 1 to 6, characterized in that The heating body is provided with a plurality of heating channels communicating with the accommodating cavity, and the outer periphery of the heating body is attached to the cavity wall of the heating cavity. The cup body is provided with a gas guiding cavity on the side away from the accommodating cavity, the gas guiding cavity communicates with the heating channels and the first air inlet channel, and the gas guiding cavity is provided with a flow guiding portion for guiding the air from the first air inlet channel to the bottom of the heating body.

11. The heating assembly of claim 10, wherein, The flow guiding portion is connected to the cavity wall of the gas guiding cavity away from the heating body, the flow guiding portion has a first flow guiding surface, and the first flow guiding surface is inclined towards the center of the bottom of the heating body; and / or the first air inlet channel and the orthographic projection of the heating cavity are located in the gas guiding cavity, and the periphery of the gas guiding cavity has a second flow guiding surface connected to the first air inlet channel.

12. An aerosol-generating device comprising: The heating assembly comprises a mouthpiece and a heating assembly as claimed in any one of claims 1-11, and the mouthpiece is cooperable with the cup body to cover the aerosol product in the accommodating cavity.

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