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, a heating body and a gas collecting part. A containing cavity and a heating cavity are formed in the cup body, an opening is formed in one end of the containing cavity, the heating cavity is formed in the other end of the containing cavity, and the opening is used for containing an aerosol product into the containing cavity; the heating body is arranged in the heating cavity and used for heating gas in the heating cavity to form hot gas flow so as to heat the aerosol product in the containing cavity. The gas collecting piece is arranged in the heating cavity and arranged on the side, facing the containing cavity, of the heating body, and the gas collecting piece is used for increasing the flow speed of the hot airflow after passing through the gas collecting piece. The gas collecting piece is arranged in the cup body, the gas collecting piece can enable the flow speed of hot air flow to be increased after the hot air flow passes through the gas collecting piece, and therefore the heating efficiency of the hot air flow on aerosol products is higher on the whole, heating is more sufficient, the heating effect is better, the amount of produced aerosol is larger, and waste of matrix materials is prevented; and the requirement that a user needs to suck a large amount of aerosol in a short time is met.

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] An aerosol generating device is a device capable of heating an aerosol generating article to allow the aerosol generating article to generate an aerosol for a user to inhale. The aerosol generating device generally includes a heating chamber in which the aerosol generating article can be heated. In some aerosol generating devices using hot air to heat, the hot air heating is prone to cause insufficient heating, resulting in waste of substrate material and difficulty in meeting the requirement for the amount of aerosol inhaled by a user due to insufficient heating. SUMMARY

[0003] The present application provides a heating assembly and an aerosol generating device, which can solve the problem of slow airflow speed in the heating assembly.

[0004] To solve the above technical problem, the present application provides a heating assembly, which includes a cup body, a heating element and a gas collecting member. The cup body is internally provided with a receiving cavity and a heating cavity. One end of the receiving cavity has an opening, and the heating cavity is arranged at the other end of the receiving cavity. The opening is used for loading an aerosol generating article into the receiving cavity. The heating element is arranged in the heating cavity and is used for heating the gas in the heating cavity to form a hot air flow to heat the aerosol generating article in the receiving cavity. The gas collecting member is arranged in the heating cavity and is arranged on the side of the heating element facing the receiving cavity, and is used for increasing the flow speed of the hot air flow after passing through the gas collecting member.

[0005] In an embodiment, a plurality of gas collecting holes are formed in the gas collecting member, and the diameter of the gas collecting hole on the side facing the heating element is greater than the diameter of the gas collecting hole on the side facing away from the heating element.

[0006] In an embodiment, the diameter of each gas collecting hole changes linearly.

[0007] In an embodiment, the outer side wall of the gas collecting member is arranged in close contact with the inner wall of the heating cavity.

[0008] In an embodiment, the diameter ratio of the gas collecting hole on the side facing away from the heating element to the diameter of the gas collecting hole on the side facing the heating element is 1:5-1:2; and / or, the radial cross section of the gas collecting hole is circular, triangular or polygonal.

[0009] In an embodiment, the gas collecting member is arranged on the heating element, and a plurality of heating channels are arranged through the heating element. Each gas collecting hole is arranged opposite to and in communication with a corresponding heating channel, and the heating channel is in communication with the receiving cavity through the corresponding gas collecting hole.

[0010] In an embodiment, the heating body comprises a heating element and a heat exchange element; the heat exchange element has a heating channel therein; the heating element is arranged on the outer circumferential surface of the heat exchange element to heat the airflow in the heating channel into a hot airflow.

[0011] In an embodiment, the cup body has a central portion and a peripheral portion arranged outside the central portion; the central portion has a receiving cavity and a heating cavity; the peripheral portion is provided with a first air inlet channel; the first air inlet channel has an air inlet end arranged close to the opening and an air outlet end arranged away from the opening; the heating channel is in communication with the air outlet end at one end thereof away from the opening.

[0012] In an embodiment, the cup body is further provided with a gas guide cavity; the gas guide cavity is arranged on one side of the central portion away from the opening; the gas guide cavity is in communication with the air outlet end and the heating channel.

[0013] To solve the above technical problems, the present application provides an aerosol generating device, which comprises a mouthpiece and a heating assembly according to any one of the above embodiments; the mouthpiece is configured to cooperate with the cup body to cover the aerosol product in the receiving cavity.

[0014] The present application provides a heating assembly, which comprises a cup body, a heating body and a gas collecting element. The cup body is provided with a receiving cavity and a heating cavity; one end of the receiving cavity has an opening, and the heating cavity is arranged at the other end of the receiving cavity; the opening is used for loading an aerosol product into the receiving cavity; the heating body is arranged in the heating cavity and is used for heating the gas in the heating cavity to form a hot airflow to heat the aerosol product in the receiving cavity; the gas collecting element is arranged in the heating cavity and is arranged on the side of the heating body facing the receiving cavity, and is used for increasing the flow rate of the hot airflow after passing through the gas collecting element. The heating assembly provided by the present application has the following advantages: by arranging the gas collecting element in the cup body, the gas collecting element can increase the flow rate of the hot airflow after passing through the gas collecting element, so that the flow rate of the hot airflow in the receiving cavity per unit time is larger, and the heating efficiency of the hot airflow on the aerosol product is higher as a whole, so that the heating is more sufficient, the heating effect is better, the amount of aerosol produced is larger, the waste of base material is prevented, and the needs of users for inhaling a large amount of aerosol in a short time are met. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 FIG. 1 is a structural schematic view of an aerosol generating device according to an embodiment of the present application;

[0016] Figure 2 FIG. 2 is a sectional view of the aerosol generating device according to the embodiment of the present application; Figure 1

[0017] Figure 3 FIG. 3 is a structural schematic view of a heating assembly and a mouthpiece according to an embodiment of the present application;

[0018] Figure 4 FIG. 4 is a structural schematic view of the heating assembly according to the embodiment of the present application; ​

[0019] Figure 5 for Figure 4 a sectional view;

[0020] Figure 6 a structural schematic view of a gas collecting member provided by an embodiment of the present application;

[0021] Figure 7 a structural schematic view of a heating body provided by an embodiment of the present application.

[0022] The figure reference: heating assembly 10, cup body 11, accommodating cavity 111, opening 1111, heating cavity 112, first air inlet channel 113, air guide cavity 114, heating body 12, heating member 121, positive electrode connecting part 1211, negative electrode connecting part 1212, heating resistor 1213, heat exchanging member 122, heating channel 1221, gas collecting member 13, gas collecting hole 131, shell 20, cover 30, suction nozzle 31, cooling air duct 32, second air inlet channel 33, air inlet hole 34, one-way valve 40, aerosol product 50. DETAILED DESCRIPTION

[0023] The present application will be further described below in conjunction with the embodiments and the accompanying drawings. In different embodiments, similar elements are denoted by similar reference numbers. In the following embodiments, many details are described in order to make the present application better understood. However, one skilled in the art can easily recognize that some features can be omitted in different cases, or can be replaced by other elements, materials, methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and it is not necessary to describe these related operations in detail for one skilled in the art according to the description in the specification and the general technical knowledge in the art.

[0024] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate way to form various embodiments, and the operation steps involved in each embodiment can also be sequentially adjusted or adjusted in a manner that one skilled in the art can easily see. Therefore, the specification and drawings are only for the purpose of clearly describing one embodiment, and do not mean that the composition and / or order is necessary.

[0025] The serial numbers of the 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. The "connection" and "coupling" in the present application include direct and indirect connections (couplings) unless otherwise specified.

[0026] The terms "parallel", "perpendicular" and the like are defined with a small amount of deviation allowed, approximately parallel, approximately perpendicular, and the like can be allowed, rather than an absolutely strict definition in a mathematical sense. For example, A is parallel to B means that A and B are parallel or approximately parallel, and the included angle between A and B can be between 0° and 10°. For example, A is perpendicular to B means that A and B are perpendicular or approximately perpendicular, and the included angle between A and B can be 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 do not 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.

[0027] Please refer to Figures 1-3 The present application provides an aerosol generating device. The aerosol generating device can be used to heat an aerosol article 50, wherein the aerosol article 50 is a solid aerosol article 50 processed or assembled into an aerosol article 50 with a predetermined shape or a bulk solid aerosol article 50. The aerosol article 50 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 50 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, and aerosol can be generated after the plant smoking substrate is heated, and the aerosol can flow out from the pores in the plant smoking substrate. The aerosol article 50 can be in the shape of a cylinder or an ellipsoid.

[0028] The aerosol generating device includes a heating assembly 10, a housing 20, a cover 30, a circuit board, a battery and an airflow sensor. The heating assembly 10 is used to heat the aerosol article 50 to generate aerosol.

[0029] 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 31, and the mouthpiece 31 is provided with an air outlet channel. The aerosol generated by the aerosol article 50 can flow out from the air outlet channel for the user to inhale. The heating assembly 10 is arranged inside the housing 20, and in an embodiment, the heating assembly 10 is arranged on the side of the housing 20 close to the mouthpiece 31.

[0030] The circuit board and the battery are electrically connected with the heating assembly 10. The controller can be arranged on the circuit board, and the controller can control the heating temperature and the heating 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 for sensing the puffing action of the user to generate a puffing signal. The controller can control the heating assembly 10 to heat in response to the puffing signal, or the controller can count the number of puffs according to the puffing signal.

[0031] Specifically, as shown in Figure 4 and Figure 5 The heating assembly 10 includes a cup body 11, a heating element 12, and a gas collecting member 13. The cup body 11 is arranged in the shell 20 and located close to the suction nozzle 31. The cup body 11 is provided with a receiving cavity 111 and a heating cavity 112. The suction nozzle 31 can be matched with the cup body 11 to cover the aerosol product 50 in the receiving cavity 111. One end of the receiving cavity 111 has an opening 1111, and the heating cavity 112 is arranged at the other end of the receiving cavity 111. The opening 1111 is used for loading the aerosol product 50 into the receiving cavity 111. When the cover 30 is buckled on the shell 20, the opening 1111 is arranged opposite to the suction nozzle 31 on the cover 30, so that the aerosol generated by the aerosol product 50 in the receiving cavity 111 can enter the air outlet channel of the suction nozzle 31 through the opening 1111. When the cover 30 is rotationally opened from the shell 20, the opening 1111 is exposed from the shell 20, so that the aerosol product 50 can be loaded into or taken out of the receiving cavity 111.

[0032] The cup body 11 is substantially in the shape of a cup. In an embodiment, the cup body 11 is made of one or more of stainless steel, ceramic, copper, iron, nickel, etc. For example, the cup body 11 can be made of stainless steel, ceramic, copper, iron, nickel, copper-nickel alloy, iron-nickel alloy, and copper-zinc alloy. For example, the cup body 11 is made of copper-zinc alloy. The inner surfaces of the heating cavity 112 and the receiving cavity 111 can be coated with a ceramic layer. The thickness of the ceramic layer can be 0.01 mm-0.08 mm. The ceramic layer can keep warm and prevent oil from sticking to the inner wall.

[0033] The heating element 12 is arranged in the heating cavity 112 and used for heating the gas in the heating cavity 112 to form a hot gas flow. The temperature of the hot gas flow is 120℃-350℃, the flow rate is 17.5 mL / s-30 mL / s, and the density is 0.65 kg / m 3 -0.94 kg / m 3 The heating cavity 112 is in communication with the atmosphere outside the aerosol generating device, so that the external airflow can enter the heating cavity 112 to be heated. Since the heating cavity 112 is in communication with the receiving cavity 111, the hot gas flow heated by the heating cavity 112 can enter the receiving cavity 111 to heat the aerosol product 50 in the receiving cavity 111.

[0034] As shown in Figure 5 and Figure 6 , the air collecting member 13 is arranged in the heating cavity 112 and is arranged on the side of the heating body 12 facing the accommodating cavity 111, for increasing the flow rate of the hot air flow after passing through the air collecting member 13. The heating assembly 10 provided by the application can increase the flow rate of the hot air flow after passing through the air collecting member 13, so that the flow of the hot air flow in the accommodating cavity 111 is larger in unit time, and the heating efficiency of the hot air flow on the aerosol product 50 is higher as a whole, so that the heating is more sufficient, the heating effect is better, and the amount of the aerosol produced is more, which prevents the waste of the substrate material and meets the needs of the user to smoke a large amount of aerosol in a short time.

[0035] In an embodiment, as shown in Figure 5 and Figure 6 , a plurality of air collecting holes 131 are arranged on the air collecting member 13, and the plurality of air collecting holes 131 means that the number of the air collecting holes 131 is at least two. The diameter of the side of the air collecting hole 131 facing the heating body 12 is larger than the diameter of the side of the air collecting hole 131 facing away from the heating body 12, that is, when the air flow flows from the side of the air collecting hole 131 close to the heating body 12 to the side of the air collecting hole 131 away from the heating body 12, the flow rate of the air flow will be accelerated due to the decrease of the diameter of the air collecting hole 131, so as to increase the speed of the hot air flow flowing into the accommodating cavity 111.

[0036] In an embodiment, the diameter of each air collecting hole 131 changes linearly, that is, the diameter of the air collecting hole 131 changes gradually, so that the flow rate of the air flow changes uniformly. In other embodiments, the diameter of the air collecting hole 131 can change in a curve type, or the diameter of the air collecting hole 131 can change abruptly, or the diameter of the air collecting hole 131 can have at least one of the linear change, the curve change and the abrupt change.

[0037] In an embodiment, the diameter ratio of the side of the air collecting hole 131 facing away from the heating body 12 to the side of the air collecting hole 131 facing the heating body 12 is 1:5-1:2, and by controlling the diameter ratio, the acceleration degree of the hot air flow can be controlled. When the length of the hole is the same, the smaller the diameter ratio is, the faster the hot air flow is accelerated, so that the heating efficiency of the hot air flow is higher.

[0038] In an embodiment, the radial cross section of each air collecting hole 131 is circular, triangular or polygonal.

[0039] In an embodiment, each air collecting hole 131 is uniformly arranged in the circumferential direction and the radial direction of the air collecting member 13, so that the hot air flow is uniformly accelerated to the accommodating cavity 111 in the radial direction and the circumferential direction.

[0040] In one embodiment, the gas collecting element 13 can be a thermally conductive material, such as a metal or ceramic with good thermal conductivity. By setting the gas collecting element 13 as a thermally conductive material, the gas collecting element 13 can also transfer a portion of the heat from the heating chamber 112 to the receiving chamber 111, thereby improving the heating efficiency of the aerosol product 50.

[0041] like Figure 5 As shown, in one embodiment, the outer wall of the gas collecting component 13 is arranged around the inner wall of the heating chamber 112, that is, the outer wall of the gas collecting component 13 is arranged around the inner wall of the cup body 11. This can prevent hot airflow from passing through the gap between the outer wall of the gas collecting component 13 and the inner wall of the heating chamber 112, and ensure that hot airflow passes through the gas collecting hole 131 of the gas collecting component 13, so as to achieve precise guidance and uniform heating of hot airflow and avoid local scorching of aerosol product 50.

[0042] In one embodiment, a gas collecting element 13 is disposed on a heating element 12. A plurality of heating channels 1221 are disposed through the heating element 12, connecting to the outside of the aerosol generating device. Each gas collecting hole 131 is directly opposite and connected to a corresponding heating channel 1221. The heating channel 1221 is connected to the receiving cavity 111 through its corresponding gas collecting hole 131. Exemplarily, the number of gas collecting holes 131 and heating channels 1221 are the same and correspond one-to-one. By connecting the gas collecting holes 131 to the heating channels 1221, each gas collecting hole 131 can accelerate the airflow within each heating channel 1221, thereby achieving precise guidance and uniform heating of the hot airflow.

[0043] In one embodiment, such as Figure 7 As shown, the heating element 12 includes a heating element 121 and a heat exchange element 122. The heat exchange element 122 has a heating channel 1221. The heating channel 1221 within the heat exchange element 122 facilitates the entry of air into the heat exchange core under negative pressure. The heating element 121 is located on the outer peripheral surface of the heat exchange element 122 to heat the airflow within the heating channel 1221 into a hot airflow. The heat exchange element 122 can be made of a high thermal conductivity material through die casting. The inner diameter of the heating channel 1221 is approximately 0.1mm-1mm, the volume ratio of the heating channel 1221 to the heat exchange core body is 1:5-1:2, the porosity of the heat exchange element 122 is 25%-80%, and the radial cross-sectional shape of the heat exchange channel can be at least one of a circle, a square, and a regular polygon. For example, the heat exchange channel can have a circular hole on the outermost side and a square hole on the inside to maximize the division of the heat exchange core surface, so that the overall porosity of the heat exchange core is high enough to generate more hot air to heat the aerosol product 50.

[0044] Specifically, the heating element 121 may include a positive electrode connection portion 1211, a negative electrode connection portion 1212, and a heating resistor 1213. The heating resistor 1213 has a mesh structure. The positive electrode connection portion 1211 and the negative electrode connection portion 1212 are electrically connected to the two ends of the heating resistor 1213, respectively. The positive electrode connection portion 1211 and the negative electrode connection portion 1212 are respectively used to connect to the positive and negative terminals of the power supply. The current flowing through the heating resistor 1213 can cause the heating resistor 1213 to generate heat.

[0045] In one embodiment, such as Figures 3-5 As shown, the cup body 11 has a central portion and a peripheral portion located outside the central portion. The central portion has a receiving cavity 111 and a heating cavity 112. The peripheral portion has a first air inlet channel 113, which has an air inlet end located near the opening 1111 and an air outlet end located away from the opening 1111. The end of the heating channel 1221 away from the opening 1111 is connected to the air outlet end. The air inlet end is connected to the outside atmosphere. Specifically, in one embodiment, as... Figure 3 As shown, the nozzle 31 also includes a cooling air passage 32 and a second air inlet passage 33. The first air inlet passage 113 surrounds the outer periphery of the cooling air passage 32. When the cover 30 is placed on the housing 20, one end of the cooling air passage 32 is connected to the receiving cavity 111, and the other end of the cooling air passage 32 is connected to the air outlet passage of the nozzle 31. The second air inlet passage 33 is connected to the external atmosphere. It can be connected to the external atmosphere and the second air inlet passage 33 by opening an air inlet hole 34 on the nozzle 31. The second air inlet passage 33 is connected to the first air inlet passage 113. When the user draws in at the nozzle 31, the airflow passes through the air inlet hole 34, the second air inlet passage 33, the first air inlet passage 113, and the heating cavity 112 in sequence before entering the receiving cavity 111 and heating the aerosol product 50. This heats the aerosol generated by the aerosol product 50 and carries it into the cooling air passage 32 for cooling, and finally flows out from the air outlet passage.

[0046] A branch air passage, leading from the second air inlet channel 33 to the cooling air passage 32, can be provided at the connection between the housing 20 and the cover 30. This branch air passage allows ambient air to enter the cooling air passage 32 during user suction, mixing with the aerosol flowing out of the accommodating cavity 111 and cooling the aerosol. Additionally, a one-way valve 40, such as a Tesla valve, can be provided on this branch air passage to allow gas to flow unidirectionally towards the cooling air passage 32. The total gas flow rate to all branch air passages should not exceed the total gas flow rate to the heating element 12 to ensure that aerosol can be drawn into the suction nozzle 31. The airflow can flow from the second intake channel 33 into the cooling channel 32, but cannot flow from the cooling channel 32 into the second intake channel 33. This allows the cold air to mix with the aerosol, reducing its temperature and diluting it to prevent burns. The one-way valve 40 also prevents the aerosol from flowing into the second intake channel 33. 10%-50% of the airflow in the second intake channel 33 is diverted at this diversion channel. The gas flow rate within the one-way valve 40 is, for example, 17.5 mL / s-30 mL / s. The aerosol-to-air dilution ratio is 1:2 to 1:1, and the aerosol temperature can be reduced from 175 degrees Celsius to 80 degrees Celsius at the outlet of the one-way valve 40.

[0047] In one embodiment, such as Figure 4 As shown, the outer portion is provided with multiple first air intake channels 113 and multiple heat insulation chambers. These channels and chambers are arranged alternately along the circumferential direction. For example, the first air intake channels 113 and heat insulation chambers can be arranged in a 1:1 ratio, meaning one heat insulation chamber is placed between two first air intake channels 113. The heat insulation chambers reduce the outward transfer of temperature from the heating chamber 112, preventing the aerosol generating device from becoming too hot to handle. Some of the heat transferred outward from the heating chamber 112 can also be used to preheat the airflow within the first air intake channels 113, resulting in higher heat utilization within the heating chamber 112. Generally, the airflow within the first air intake channels 113 can be preheated to 50℃-100℃ before entering the heating chamber 112 for further heating. The heat insulation chambers are sealed cavity structures, which can be vacuum chambers, creating a pressure difference of -30 bar to -10 bar with the outside of the cup body 11, thus reducing the temperature. The insulation cavity can also be filled with metal heat dissipation materials, such as copper foil, aluminum foil, and other metal foils with large heat dissipation areas.

[0048] In an embodiment, the cup 11 is further provided with a gas guiding cavity 114 located at a side of the central portion away from the opening 1111, the gas guiding cavity 114 being in communication with the gas outlet end of the first gas inlet passage 113 and the heating passage 1221. The gas guiding cavity 114 is used to guide the gas flow of the peripheral portion to the central portion. A gas guiding portion for guiding the gas flow can be arranged in the gas guiding cavity 114. For example, a slope can be arranged in the middle of the gas guiding cavity 114 to prevent the gas flow from colliding and causing turbulence, and the slope can guide the gas flow to the heating cavity 112 to prevent the gas flow from gathering below the heating cavity 112. The longitudinal section of the slope can be trapezoidal, arc-shaped, or the like.

[0049] The above application of specific examples to illustrate the present application is only used to help understand the present application, and is not used to 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 application relates to a heating assembly for an aerosol product. The heating assembly comprises: a cup body, which is internally provided with a containing cavity and a heating cavity, the containing cavity is provided with an opening at one end, and the heating cavity is arranged at the other end of the containing cavity, the opening is used for loading an aerosol product into the containing cavity; a heating element arranged in the heating cavity and used for heating gas in the heating cavity to form a hot gas flow to heat the aerosol product in the containing cavity; 2. The heating assembly of claim 1, wherein, and a gas collecting element arranged in the heating cavity and located on the side of the heating element facing the containing cavity, which is used for increasing the flow rate of the hot gas flow after the hot gas flow passes through the gas collecting element.

3. The heating assembly of claim 2, wherein, A plurality of gas collecting holes are arranged on the gas collecting element, the hole diameter of the side of the gas collecting hole facing the heating element is larger than the hole diameter of the side of the gas collecting hole facing away from the heating element.

4. The heating assembly of claim 2, wherein, The hole diameter of each gas collecting hole changes linearly.

5. The heating assembly according to any one of claims 2-4, characterized in that, The outer side wall of the gas collecting element is arranged in close contact with the inner wall of the heating cavity.

6. The heating assembly of any of claims 2-4, wherein, The hole diameter ratio of the side of the gas collecting hole facing away from the heating element to the side of the gas collecting hole facing the heating element is 1:5-1:2; and / or the radial cross section of the gas collecting hole is circular, triangular or polygonal.

7. The heating assembly of claim 4, wherein, The gas collecting element is arranged on the heating element, a plurality of heating channels are arranged in the heating element in a penetrating mode; each gas collecting hole is arranged opposite to and communicates with the corresponding heating channel, and the heating channel communicates with the containing cavity through the corresponding gas collecting hole.

8. The heating assembly of claim 7, wherein, The heating element comprises a heating element and a heat exchanging element; the heat exchanging element is internally provided with a heating channel; the heating element is arranged on the outer circumferential surface of the heat exchanging element to heat the gas flow in the heating channel into a hot gas flow.

9. The heating assembly of claim 8, wherein, The cup body is internally provided with a central part and a peripheral part arranged outside the central part, the central part is provided with the containing cavity and the heating cavity; the peripheral part is provided with a first air inlet channel, the first air inlet channel is provided with an air inlet end arranged close to the opening and an air outlet end arranged away from the opening; the end of the heating channel away from the opening communicates with the air outlet end.

10. An aerosol-generating device comprising: The cup body is further provided with a gas guiding cavity, the gas guiding cavity is located on the side of the central part away from the opening; the gas guiding cavity communicates the air outlet end and the heating channel. The application further relates to a smoking device comprising a mouthpiece and the heating assembly according to any one of claims 1-9, the mouthpiece is matched with the cup body to cover the aerosol product in the containing cavity.

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