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, and the center part is provided with a containing cavity and a heating cavity. 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; a plurality of first air inlet channels and a plurality of cooling cavities are formed in the outer side part, the first air inlet channels are arranged at intervals in the circumferential direction of the cup body, and at least one cooling cavity is formed between every two adjacent first air inlet channels; 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, away from the heating cavity, of the containing cavity. The other end of the heating cavity is communicated with the containing cavity. According to the aerosol generating device, the energy utilization rate of the heating assembly can be improved, and the aerosol generating device is prevented from scalding hands and parts in the aerosol generating device are prevented from being damaged due to high temperature.

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 puff. The aerosol generating device generally includes a heating chamber into which a smoking segment of a heat-not-burn article is inserted for heating, while a filter is exposed outside.

[0003] However, the heating chamber is high in temperature when heated, and the outward transfer of heat from the heating chamber results in low heat utilization and causes the aerosol generating device to be scalding hot or damage other parts inside the aerosol generating device. SUMMARY

[0004] The present application provides a heating assembly and an aerosol generating device, which solve the problems of low heat utilization, scalding hot aerosol generating device, and damage to other parts due to high temperature caused by the outward transfer of heat from the heating chamber.

[0005] To solve the above technical problem, the present application provides a heating assembly, which includes a cup body and a heating body. The cup body is internally provided with a center portion and an outer portion located outside the center portion, the center portion has a receiving cavity and a heating chamber, the receiving cavity is used for accommodating an aerosol generating article; the heating body is arranged in the heating chamber, and the heating body is used for heating airflow flowing into the heating chamber into hot airflow, and the hot airflow is used for flowing into the receiving cavity to heat the aerosol generating article.

[0006] 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 at intervals along the circumference of the cup body, and at least one cooling cavity is arranged between every two adjacent first air inlet channels; each first air inlet channel has an air inlet end and an air outlet end, the air inlet end is arranged on a side of the receiving cavity away from the heating chamber; one end of the heating chamber is communicated with the air outlet end, and the other end is communicated with the receiving cavity.

[0007] In an embodiment, the total contact area of the plurality of first air inlet channels with the outer wall of the heating chamber is greater than the total contact area of the plurality of cooling cavities with the outer wall of the heating chamber; and / or, the contact area of each first air inlet channel with the outer wall of the heating chamber is greater than the contact area of each cooling cavity with the outer wall of the heating chamber.

[0008] In an embodiment, the axial cross-sectional area of each first air inlet channel near the side where the center portion is located is greater than the axial cross-sectional area of the first air inlet channel away from the side where the center portion is located.

[0009] In an embodiment, the axial cross-sectional area of the first air inlet channel gradually decreases from the side close to the center portion to the side away from the center portion.

[0010] In an embodiment, the cooling cavity extends at least to the radial outside of the heating cavity.

[0011] In an embodiment, a vacuum cavity is formed in the cooling cavity; or, the cooling cavity is filled with a heat insulation filler, a cooling medium or a heat dissipation material.

[0012] In an embodiment, at least one of the cooling cavities is filled with aerogel or a metal foil that is folded multiple times and then overlapped.

[0013] In an embodiment, the cup is made of stainless steel, ceramic, copper, iron, nickel, copper-nickel alloy, iron-nickel alloy or copper-zinc alloy; and / or, the inner wall of the cup is provided with a heat preservation layer.

[0014] In an embodiment, the heating body is provided with a plurality of heat exchange channels; the central portion further has a buffer cavity, which is arranged on the side of the heating cavity away from the accommodating cavity and communicates with each first air inlet channel and heat exchange channel.

[0015] To solve the above technical problems, the present application provides an aerosol generating device, which comprises the heating assembly of any of the above embodiments.

[0016] The present application provides a heating assembly, which comprises a cup and a heating body. The cup is provided with a central portion and an outer portion arranged outside the central portion, the central portion has an accommodating cavity and a heating cavity, the accommodating cavity is used for accommodating an aerosol product; the heating body is arranged in the heating cavity, and is used for heating the airflow flowing into the heating cavity into a hot airflow, the hot airflow is used for flowing into the accommodating cavity to heat the aerosol product; 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 at intervals along the circumference of the cup, and at least one cooling cavity is arranged between every two adjacent first air inlet channels; the first air inlet channel has an air inlet end and an air outlet end, the air inlet end is arranged on the side of the accommodating cavity away from the heating cavity; one end of the heating cavity communicates with the air outlet end, and the other end communicates with the accommodating cavity. The aerosol generating device of the present application is provided with the first air inlet channel and the cooling cavity outside the accommodating cavity and the heating cavity of the central portion, so that the heat transferred outward by the heating cavity and the accommodating cavity can reach the first air inlet channel to preheat the gas in the first air inlet channel, the gas in the first air inlet channel is heated by the heating cavity into a hot airflow, and finally flows into the accommodating cavity to heat the aerosol product, so that the heat transferred outward by the heating cavity and the accommodating cavity can also be used to heat the aerosol product, thereby improving the energy utilization rate of the heating assembly. In addition, the cooling cavity arranged outside the heating cavity and the accommodating cavity can reduce the heat emitted outward by the cup, retain the heat in the interior of the heating assembly, and prevent the aerosol generating device from being scalded and other parts in the aerosol generating device from being damaged due to high temperature. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1A structure schematic diagram of an aerosol generating device provided by an embodiment of the present application;

[0018] Figure 2 A longitudinal sectional view of Figure 1 ;

[0019] Figure 3 A structure schematic diagram of a heating assembly and a mouthpiece provided by an embodiment of the present application;

[0020] Figure 4 A structure schematic diagram of a heating assembly provided by an embodiment of the present application;

[0021] Figure 5 A longitudinal sectional view of Figure 4 ;

[0022] Figure 6 A transverse sectional view of Figure 4 ;

[0023] Figure 7 A structure schematic diagram of a metal foil provided by an embodiment of the present application;

[0024] Figure 8 A structure schematic diagram of a heating element provided by an embodiment of the present application.

[0025] The drawing label: heating assembly 10, cup body 11, center part 111, outer side part 112, accommodating cavity 113, opening 1131, heating cavity 114, first air inlet channel 115, air inlet end 1151, air outlet end 1152, cooling cavity 116, buffer cavity 117, heating element 12, heating part 121, positive electrode connecting part 1211, negative electrode connecting part 1212, heating resistor 1213, heat exchange part 122, heating channel 1221, metal foil 13, one-way valve 14, shell 20, cover 30, mouthpiece 31, air outlet channel 311, cooling air duct 32, second air inlet channel 33, air inlet hole 34, aerosol product 40. DETAILED DESCRIPTION

[0026] The present application will be further described in details through specific embodiments combined with the drawings. In different embodiments, similar elements are associated with similar element labels. In the following embodiments, many details are described in order to make the present 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, 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 those skilled in the art according to the description in the specification and the general technical knowledge in the art.

[0027] Additionally, the features described in the specification, operations or steps can be combined with each other in any appropriate manner, and the order of the operations or steps corresponding to the various embodiments can be adjusted as is readily apparent to those skilled in the art. Therefore, the description and drawings are merely to illustrate certain embodiments and do not mean to be mandatory.

[0028] The serial numbers of components in the specification, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequential or technical meaning. The "connection" and "coupling" in the present application include direct and indirect connections (couplings) unless otherwise specified.

[0029] The terms "parallel", "perpendicular", etc. are not strictly defined in the mathematical sense, and a small amount of deviation is allowed, and approximate parallel, approximate perpendicular, etc. are also allowed. For example, A is parallel to B, which means that A and B are parallel or approximately parallel, and the included angle between A and B is between 0° and 10°. For example, A is perpendicular to B, which means that A and B are perpendicular or approximately perpendicular, and the included angle between A and B is between 80° and 100°. The orientation terms mentioned in the embodiments of the present application, such as "upper", "inner", "outer", "side", etc., are only the direction of the drawings, therefore, the orientation terms used are for better and clearer illustration and understanding of the embodiments of the present application, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0030] 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 40, wherein the aerosol article 40 is a solid aerosol article 40 processed or assembled into an aerosol article 40 with 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 stamping or extrusion. The plant smoking substrate inside is in a fluffy and porous shape, and the aerosol article 40 can be in the shape of a cylinder or an ellipsoid.

[0031] The aerosol-generating device comprises a heating assembly 10 for heating an aerosol article 40 to generate an aerosol. The aerosol-generating device can further comprise a cover 30 which can be provided on the heating assembly 10 to enclose the aerosol article 40.

[0032] The aerosol-generating device can further comprise a housing 20, the cover 30, a circuit board, a battery, an airflow sensor, etc.

[0033] In some embodiments, the housing 20 and the cover 30 can be relatively rotatable or movable, 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 can be provided with an air outlet passage 311. The aerosol generated by the aerosol article 40 can flow out of the air outlet passage 311 for a user to inhale. The heating assembly 10 is arranged inside the housing 20. In an embodiment, the heating assembly 10 is arranged on a side of the housing 20 close to the mouthpiece 31.

[0034] The circuit board and the battery are electrically connected to the heating assembly 10. The circuit board can be provided with a controller which 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 to the controller. The airflow sensor is used to sense the inhaling action of a user 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.

[0035] As shown in Figures 4-6 The heating assembly 10 comprises a cup body 11 and a heating body 12. The cup body 11 is arranged inside the housing 20 and located close to the mouthpiece 31. The cup body 11 is provided with a central portion 111 and an outer portion 112 arranged outside the central portion 111. The central portion 111 is exemplarily a cylindrical cavity, and the outer portion 112 is exemplarily a tube which surrounds the outer periphery of the central portion 111.

[0036] The central portion 111 is provided with a receiving cavity 113 and a heating cavity 114. The mouthpiece 31 can be matched with the cup body 11 to cover the aerosol article 40 in the receiving cavity 113. One end of the receiving cavity 113 is provided with an opening 1131, and the heating cavity 114 is arranged at the end of the receiving cavity 113 away from the opening 1131. The opening 1131 is used for loading the aerosol article 40 into the receiving cavity 113. When the cover 30 is buckled on the housing 20, the opening 1131 is arranged opposite to the mouthpiece 31 on the cover 30, so that the aerosol generated by the aerosol article 40 in the receiving cavity 113 can enter the air outlet passage 311 of the mouthpiece 31 through the opening 1131. When the cover 30 is opened from the housing 20, the opening 1131 is exposed from the housing 20, so that the aerosol article 40 can be loaded into or taken out of the receiving cavity 113.

[0037] In an embodiment, the cup 11 is made of one or more of stainless steel, ceramic, copper, iron, nickel, etc. For example, the cup 11 can be made of stainless steel, ceramic, copper, iron, nickel, copper-nickel alloy, iron-nickel alloy, and copper-zinc alloy. Exemplarily, the cup 11 is made of copper-zinc alloy. The inner surface of the heating cavity 114 and the accommodating cavity 113 can be plated with a heat preservation layer (not shown in the figure). That is, the inner wall of the cup 11 can be plated with a heat preservation layer. The heat preservation layer can be a ceramic layer, for example. The thickness of the heat preservation layer can be 0.01 mm-0.08 mm. The heat preservation layer can preserve heat and prevent oil from sticking to the inner wall.

[0038] The heating body 12 is arranged in the heating cavity 114 to heat the gas flowing into the heating cavity 114 into a hot gas flow. The hot gas flow flows into the accommodating cavity 113 to heat the aerosol product 40. The temperature of the hot gas flow is 120°C-350°C, 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 .

[0039] As shown in Figure 6 , the outer portion 112 is provided with a plurality of first air inlet channels 115 and a plurality of cooling cavities 116. Exemplarily, the number of the first air inlet channels 115 and the cooling cavities 116 is greater than ten. Figure 6 Each first air inlet channel 115 is arranged along the circumferential direction of the cup 11. At least one cooling cavity 116 is arranged between every two adjacent first air inlet channels 115. That is, as shown in an embodiment,

[0040] As shown in Figure 5 , the first air inlet channel 115 extends along the axial direction of the cup 11. The first air inlet channel 115 has an air inlet end 1151 and an air outlet end 1152. The air inlet end 1151 is arranged on the side of the accommodating cavity 113 away from the heating cavity 114, i.e., the air inlet end 1151 is arranged on the side close to the opening 1131. The air outlet end 1152 is arranged on the side away from the opening 1131. One end of the heating cavity 114 is communicated with the air outlet end 1152, and the other end is communicated with the accommodating cavity 113. The gas flow enters the first air inlet channel 115 from the air inlet end 1151 of the first air inlet channel 115, flows into the heating cavity 114 from the air outlet end 1152 of the first air inlet channel 115, is heated into a hot gas flow in the heating cavity 114, and then enters the accommodating cavity 113 to heat the aerosol product 40.

[0041] Further, specifically, in one embodiment, as Figure 3 As shown, the nozzle 31 also includes a cooling air passage 32 and a second air intake passage 33. The second air intake passage 33 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 113, and the other end of the cooling air passage 32 is connected to the air outlet passage 311 of the nozzle 31. The second air intake passage 33 is connected to the external atmosphere, which can be achieved by opening an air inlet 34 on the nozzle 31, which connects to the external atmosphere and the second air intake passage 33. When the cover 30 is fastened to the housing 20, the second air intake passage 33 of the nozzle 31 is connected to the air inlet end 1151 of the first air intake passage 115 of the cup body 11, and the cooling air passage 32 of the nozzle 31 is connected to the receiving cavity 113 of the cup body 11. When the user inhales at the nozzle 31, the airflow passes through the air inlet 34, the second air inlet channel 33, the first air inlet channel 115, and the heating chamber 114 in sequence before entering the accommodating chamber 113 and heating the aerosol product 40. The airflow then carries the aerosol generated by the aerosol product 40 into the cooling airway 32 for cooling, and finally flows out from the outlet channel 311.

[0042] The aerosol generating apparatus and heating assembly 10 of this application have a first air inlet channel 115 and a cooling chamber 116 provided outside the accommodating cavity 113 and heating cavity 114 in the central portion 111. The heat transferred outward from the heating cavity 114 and accommodating cavity 113 can reach the first air inlet channel 115 to preheat the gas in the first air inlet channel 115. The gas in the first air inlet channel 115 is heated into a hot airflow through the heating cavity 114 and finally flows into the accommodating cavity 113 to heat the aerosol product 40. Therefore, the heat transferred outward from the heating cavity 114 and accommodating cavity 113 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 115 can be preheated to 50°C-100°C before entering the heating cavity 114 for further heating. Furthermore, the cooling chamber 116 provided outside the heating chamber 114 and the accommodating chamber 113 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 touch, and prevent damage to other parts inside the aerosol generating device.

[0043] In one embodiment, such as Figure 6As shown, the total contact area of the plurality of first air inlets 115 with the outer wall of the heating cavity 114 is greater than the total contact area of the plurality of cooling cavities 116 with the outer wall of the heating cavity 114, and / or the contact area of each second air inlet 33 with the outer wall of the heating cavity 114 is greater than the contact area of each cooling cavity 116 with the outer wall of the heating cavity 114. Through the above structure, most of the heat dissipated from the outer wall of the heating cavity 114 will enter the first air inlets 115, and a small amount of heat will enter the cooling cavities 116, so that most of the heat dissipated outward is used to preheat the gas in the first air inlets 115, thereby improving the energy utilization rate of the heating assembly 10, and the cooling cavities 116 can retain a small amount of heat that does not enter the first air inlets 115 inside the heating assembly 10 to prevent the heat from continuing to dissipate outward from the cup body 11. Further, the total contact area of the plurality of first air inlets 115 with the outer wall of the accommodating cavity 113 is greater than the total contact area of the plurality of cooling cavities 116 with the outer wall of the accommodating cavity 113, and / or the contact area of each second air inlet 33 with the outer wall of the accommodating cavity 113 is greater than the contact area of each cooling cavity 116 with the outer wall of the accommodating cavity 113.

[0044] In an embodiment, the outer wall of the cooling cavity 116 and the heating cavity 114 is in line contact, that is, the profiles of the outer walls of two adjacent first air inlets 115 and the heating cavity 114 are connected by a connecting line, so that the outer wall of the first air inlet 115 and the heating cavity 114 are in surface contact, and the outer wall of the cooling cavity 116 and the heating cavity 114 are in line contact, so that the contact area of the outer wall of the heating cavity 114 and the first air inlet 115 is relatively greater than the contact area of the outer wall of the heating cavity 114 and the cooling cavity 116, thereby improving the energy utilization rate of the heating assembly 10 and reducing heat loss. In other embodiments, the outer wall of the cooling cavity 116 and the heating cavity 114 can also be in surface contact, that is, the profiles of the outer walls of two adjacent first air inlets 115 and the heating cavity 114 are spaced apart, and only the surface contact area of the outer wall of the cooling cavity 116 and the heating cavity 114 needs to be less than the surface contact area of the outer wall of the first air inlet 115 and the heating cavity 114, so that increasing the contact area of the outer wall of the cooling cavity 116 and the heating cavity 114 can improve the heat preservation effect inside the cup body 11 and reduce the proportion of heat dissipated outward from the cup body 11. Further, the outer wall of the cooling cavity 116 and the accommodating cavity 113 can be in line contact, or the outer wall of the cooling cavity 116 and the accommodating cavity 113 can be in surface contact.

[0045] In an embodiment, the axial cross-sectional area of each first gas inlet passage 115 adjacent to the side where the central portion 111 is located is greater than the axial cross-sectional area of the first gas inlet passage 115 away from the side where the central portion 111 is located, i.e., the inner diameter of the first gas inlet passage 115 decreases from the inside to the outside. Specifically, the inner diameter of the first gas inlet passage 115 can be 0.1 mm-2 mm. In an embodiment, the axial cross-sectional area of the first gas inlet passage 115 gradually decreases from the side close to the central portion 111 to the side away from the central portion 111, i.e., the inner diameter of the first gas inlet passage 115 gradually decreases from the inside to the outside. Since the inner diameter of the first gas inlet passage 115 on the inside is relatively large, the heat dissipated by the outer wall of the heating cavity 114 can be preferentially used to enter the first gas inlet passage 115 to heat the gas in the first gas inlet passage 115, thereby improving the utilization rate of heat in the heating cavity 114. When the heat in the first gas inlet passage 115 further dissipates to the outside of the first gas inlet passage 115, since the inner diameter of the first gas inlet passage 115 on the outside is relatively small, the contact area between the first gas inlet passage 115 and the outermost wall of the cup 11 is small, and the heat dissipated by the first gas inlet passage 115 to the outside of the cup 11 is also small, thereby reducing the proportion of heat dissipated to the outside of the cup 11. Further, the axial cross-sectional area of each cooling cavity 116 adjacent to the side where the central portion 111 is located is less than the axial cross-sectional area of the cooling cavity 116 away from the side where the central portion 111 is located, i.e., the inner diameter of the cooling cavity 116 gradually increases from the inside to the outside, thereby further improving the heat preservation effect in the cup 11.

[0046] In an embodiment, the interface between the plurality of first gas inlet passages 115 and the plurality of cooling cavities 116 can be wavy or zigzag, and specifically, the radial cross-sectional shape of a single first gas inlet passage 115 and a single cooling cavity 116 can be approximately triangular, semicircular, rectangular, etc.

[0047] In an embodiment, the cooling cavity 116 extends at least to the radial outside of the heating cavity 114. Since the heating cavity 114 is the cavity with the highest temperature inside the cup 11, arranging the cooling cavity 116 radially outside the heating cavity 114 can prevent heat in the high-temperature zone from dissipating to the outside of the cup 11. For example, the cooling cavity 116 extends from the side of the outer portion 112 close to the opening 1131 of the accommodating cavity 113 to the side of the outer portion 112 away from the opening 1131, so that the cooling cavity 116 can heat preserve the heat dissipated to the outside of the accommodating cavity 113.

[0048] In an embodiment, the cooling cavity 116 is a closed cavity, and a vacuum cavity can be formed in the cooling cavity 116, so that the cooling cavity 116 and the outside of the cup 11 form a pressure difference of-30 bar to-10 bar. Alternatively, the cooling cavity 116 can be filled with heat insulation filler, cooling medium or heat dissipation material, for example, at least one cooling cavity 116 can be filled with aerogel, or, for example, Figure 7As shown, at least one cooling cavity 116 is provided with a metal foil 13 that has been bent and stacked multiple times. The metal foil 13 after multiple bends has a large heat absorption area, thereby reducing the proportion of heat dissipated to the outside of the cooling cavity 116.

[0049] In one embodiment, such as Figure 4 As shown, a diversion channel can be provided at the connection between the housing 20 and the nozzle 31, or at the end of the nozzle 31, leading from the second air inlet channel 33 to the cooling air channel 32. This diversion channel allows ambient air to enter the cooling air channel 32 during user suction, where it mixes with the aerosol flowing out of the accommodating cavity 113, thus cooling the aerosol. Additionally, a one-way valve 14 can be provided on this diversion channel to allow gas to flow unidirectionally towards the cooling air channel 32; the one-way valve 14 could be, for example, a Tesla valve. The total gas flow rate to all diversion channels can be no greater than the total gas flow rate to the heating element 12 to ensure that aerosol can be drawn into the 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 14 also prevents the aerosol from flowing into the second intake channel 33. The airflow in the second intake channel 33 is split by 10%-50% at the split channel, and the gas flow rate within the one-way valve 14 is, for example, 17.5 mL / s-30 mL / s. The aerosol-to-air dilution ratio is 1:2-1:1, and the aerosol temperature can be reduced from 175°C to 80°C at the outlet of the one-way valve 14.

[0050] In one embodiment, such as Figure 8 As shown, the heating element 12 includes a heating element 121 and a heat exchanger 122. The heat exchanger 122 has multiple heating channels 1221. These heating channels 1221 facilitate air entry into the heat exchange core under negative pressure. The heating element 121 is located on the outer peripheral surface of the heat exchanger 122 to heat the airflow within the heating channels 1221 into a hot airflow. The heat exchanger 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 is 25%-80%, and the radial cross-sectional shape of the heat exchange channel can be at least one of circular, square, and regular polygonal shapes. For example, the heat exchange channel can have a circular outermost hole and a square inner hole to maximize the division of the heat exchange core surface, making the overall heat exchange core porosity sufficiently high, generating more hot air to heat the aerosol product 40.

[0051] Specifically, the heating element 121 can include a positive electrode connecting portion 1211, a negative electrode connecting portion 1212, and a heating resistor 1213 in a mesh structure, and the positive electrode connecting portion 1211 and the negative electrode connecting portion 1212 are respectively electrically connected to both ends of the heating resistor 1213. The positive electrode connecting portion 1211 and the negative electrode connecting portion 1212 are respectively used for connecting the positive and negative electrodes of a power supply, and the current flowing through the heating resistor 1213 can make the heating resistor 1213 generate heat.

[0052] In an embodiment, the center portion 111 further has a buffer cavity 117, which is arranged on the side of the heating cavity 114 away from the accommodating cavity 113, and the buffer cavity 117 is in communication with each first air inlet channel 115 and the heat exchange channel. The buffer cavity 117 is used to guide the airflow of the peripheral portion to the center portion 111. A gas guiding portion can be arranged in the buffer cavity 117 for guiding the airflow. For example, a slope can be arranged in the middle of the buffer cavity 117 to prevent the airflow from colliding and causing turbulence, and the slope can guide the airflow to the heating cavity 114 to prevent part of the airflow from gathering below the heating cavity 114. The longitudinal section of the slope can be, for example, trapezoidal, semicircular, or the like.

[0053] The above application of specific examples to illustrate the present application 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 application relates to a heating assembly. The heating assembly comprises: a cup body, which is internally provided with a central part and an outer part arranged outside the central part, the central part is provided with a containing cavity and a heating cavity, the containing cavity is used for containing an aerosol product; and a heating body arranged in the heating cavity, the heating body is used for heating airflow flowing into the heating cavity into hot airflow, the hot airflow is used for flowing into the containing cavity to heat the aerosol product; 2. The heating assembly of claim 1, wherein, the outer 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, at least one cooling cavity is arranged between each two adjacent first air inlet channels; 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 of the containing cavity away from the heating cavity; one end of the heating cavity is communicated with the air outlet end, and the other end is communicated with the containing cavity.

3. The heating assembly of claim 1, wherein, 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.

4. The heating assembly of claim 3, wherein, The axial cross-sectional area of each first air inlet channel on the side close to the central part is greater than the axial cross-sectional area of the first air inlet channel on the side away from the central part.

5. The heating assembly of claim 1, wherein, From the side close to the central part to the side away from the central part, the axial cross-sectional area of the first air inlet channel gradually decreases.

6. The heating assembly of any one of claims 1-5, wherein, The cooling cavity at least extends to the radial outer side of the heating cavity.

7. The heating assembly of claim 6, wherein, A vacuum cavity is formed in the cooling cavity; or the cooling cavity is filled with heat insulation filler, cooling medium or heat dissipation material.

8. The heating assembly of any one of claims 1-5, wherein, At least one cooling cavity is filled with aerogel or metal foil which is folded multiple times and then superimposed.

9. The heating assembly of any one of claims 1-5, wherein, The cup body is made of stainless steel, ceramic, copper, iron, nickel, copper-nickel alloy, iron-nickel alloy or copper-zinc alloy; and / or, the inner wall of the cup body is provided with a heat preservation layer. The heating body is provided with a plurality of heat exchange channels; 10. An aerosol-generating device comprising: The central part is further provided with a buffer cavity arranged on the side of the heating cavity away from the containing cavity, the buffer cavity is communicated with each first air inlet channel and the heat exchange channel. The application further relates to a heating assembly comprising the heating assembly as claimed in any one of claims 1-9.

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