Heat-not-burn device and aerosol-generating system

Abstract

The utility model is suitable for the technical field of heat-not-burn, and discloses a heat-not-burn device and an aerosol generating system. Wherein the heating non-combustion device comprises a heating assembly and a suction nozzle, the heating assembly is provided with a heating cavity and an opening communicated with the heating cavity, and the heating cavity is used for containing a fuming substrate; the suction nozzle is provided with an air outlet channel penetrating through the axial direction of the suction nozzle, and the air outlet channel is used for being in butt joint with the opening so that aerosol generated by the fuming matrix in the heating cavity can flow out. The suction nozzle is further provided with an air inlet channel isolated from the downstream end of the air outlet channel, and the air inlet channel is communicated with the upstream end of the air outlet channel and the outside and used for conveying airflow into the suction nozzle from the outside. According to the heating non-combustion device, the length of the gas inlet channel is shortened, gas can rapidly enter the heating non-combustion device, waste is avoided, and the use cost of a user is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat-not-burn, in particular to a heat-not-burn device and an aerosol generating system. BACKGROUND

[0002] An aerosol product is generally in a columnar shape, comprising a filter segment and a smoking substrate. The heat-not-burn device is a device for heating the aerosol product to generate an aerosol, which is provided with a heating cavity for accommodating the aerosol product and an air inlet channel for allowing external air to enter the heat-not-burn device. In the related art, the air inlet channel is formed in the main housing part of the heat-not-burn device, which can result in a too long air inlet channel and slow down the air delivery. Moreover, the aerosol product is a consumable, which needs to be discarded by the user after the smoking is completed, resulting in waste and increasing the use cost of the user. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a heat-not-burn device and an aerosol generating system, aiming to solve the technical problems of slow air delivery and high use cost of the user.

[0004] According to a first aspect of the present application, a heat-not-burn device is provided in an embodiment, comprising:

[0005] a heating assembly provided with a heating cavity for accommodating a smoking substrate and an opening communicating with the heating cavity; and

[0006] a mouthpiece provided with an air outlet channel penetrating through the axial direction thereof, the air outlet channel being used for being connected with the opening to allow the aerosol generated by the smoking substrate in the heating cavity to flow out;

[0007] wherein the mouthpiece is further provided with an air inlet channel which is isolated from the downstream end of the air outlet channel and communicates with the upstream end of the air outlet channel and the outside, and is used for delivering the air flow from the outside to the mouthpiece.

[0008] In an embodiment, the heat-not-burn device comprises a first part and a second part, the first part comprises the mouthpiece, and the second part comprises the heating assembly, the first part is detachably connected to the second part or movably connected to the second part to switch the heating cavity between a closed state and an open state.

[0009] When the heating cavity is in the closed state, the first part covers the second part, the opening is connected and communicated with the air outlet channel, and the heating assembly can heat the smoking substrate in the heating cavity to generate the aerosol.

[0010] When the heating cavity is in the open state, the opening is exposed, and the smoking substrate can pass in and out of the heating cavity through the opening.

[0011] In one embodiment, the air inlet channel extends along the axial direction of the mouthpiece; and / or, the air inlet channel is arranged around the periphery of the air outlet channel.

[0012] In one embodiment, the air outlet channel is provided with a first air outlet section and a second air outlet section;

[0013] The first air outlet section is used to interface with the opening to communicate the heating cavity and the second air outlet section, and the cross-sectional area of the second air outlet section in a direction perpendicular to the axial direction of the mouthpiece is smaller than the cross-sectional area of the first air outlet section in a direction perpendicular to the axial direction.

[0014] In one embodiment, the air outlet channel is further provided with a third air outlet section, one end of the second air outlet section communicates with the third air outlet section, and the cross-sectional area of the second air outlet section in a direction perpendicular to the axial direction is smaller than the cross-sectional area of the third air outlet section in a direction perpendicular to the axial direction.

[0015] In one embodiment, the heating assembly is further provided with an air guide channel, one end of the air guide channel communicates with the heating cavity, and the other end communicates with the air inlet channel, for conveying airflow from the air inlet channel to the heating cavity.

[0016] In one embodiment, the heating assembly includes a heating cup and a heating core;

[0017] The heating cup includes a cup bottom wall and a cup side wall, the cup bottom wall is connected to one end of the cup side wall, and the cup bottom wall and the cup side wall enclose the heating cavity, and the opening is located at one end of the cup side wall away from the cup bottom wall; the air guide channel is formed in the cup side wall and arranged around the periphery of the heating cavity;

[0018] The heating core is accommodated at one end of the heating cavity close to the cup bottom wall, and has a gap with the cup bottom wall, and the heating core is used to generate heat after being powered on;

[0019] The heating core is provided with a plurality of heat exchange channels, the heat exchange channels communicate the gap and one end of the heating cavity away from the cup bottom wall, and the one end of the heating cavity away from the cup bottom wall is used to accommodate the smoking substrate, and the air guide channel communicates the gap.

[0020] In one embodiment, the heating assembly further includes a flow guide portion;

[0021] The flow guide portion is protruded on the side of the cup bottom wall facing the gap, and has a guide surface for guiding the airflow entering from the air guide channel to the heating core.

[0022] In one embodiment, the heating assembly further comprises a gas collecting plate, which is arranged at one end of the heating core away from the cup bottom wall, and used for carrying the smoking substrate;

[0023] The gas collecting plate comprises a first side and a second side arranged oppositely, and the first side faces the heating core; a plurality of flow guide channels communicating with the heat exchange channels are arranged through the gas collecting plate along a direction from the first side to the second side;

[0024] The cross-sectional area of the flow guide channel gradually decreases along the direction from the first side to the second side.

[0025] According to the second aspect of the present application, in one embodiment, an aerosol generating system is provided, which comprises a smoking substrate and the heating non-combustion device of the above-mentioned first aspect, and the smoking substrate is detachably accommodated in the heating cavity.

[0026] According to the heating non-combustion device and the aerosol generating system of the above-mentioned embodiments, the gas outlet channel of the mouthpiece is communicated with the heating cavity of the heating assembly, so that the aerosol generated by the heating assembly when heating the smoking substrate in the heating cavity can be discharged through the mouthpiece. By arranging the gas inlet channel and the gas outlet channel on the mouthpiece, and communicating the gas inlet channel with the gas outlet channel, the gas inlet channel does not need to be too long, so that the gas can be transported from the outside to the gas outlet channel, thereby accelerating the transportation of the gas. Moreover, the heating assembly accommodates and heats the smoking substrate, and after the smoking substrate is used up, only the smoking substrate needs to be replaced, and the mouthpiece can continue to be used, thereby avoiding waste and reducing the use cost of the user. Therefore, the heating non-combustion device of the present application shortens the length of the gas inlet channel, so that the gas can quickly enter the heating non-combustion device, and waste is also avoided, thereby reducing the use cost of the user. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 A state diagram of the aerosol generating system provided by the embodiments of the present application when the heating cavity is in a closed state;

[0028] Figure 2 A state diagram of the aerosol generating system provided by the embodiments of the present application when the heating cavity is in an open state;

[0029] Figure 3 A sectional view of the aerosol generating system provided by the embodiments of the present application;

[0030] Figure 4 A Figure 3 A local enlarged view of position A in FIG. 6;

[0031] Figure 5 An assembly structure schematic diagram of the mouthpiece and the one-way valve provided by the embodiments of the present application;

[0032] Figure 6 An exploded view of the heating core provided for the embodiment of the present application;

[0033] Figure 7 A structural schematic view of the gas collecting plate provided for the embodiment of the present application.

[0034] In the figure:

[0035] 100, a heat-not-burn device; 10, a first part; 11, a mouthpiece; 111, an air outlet passage; 1111, a first air outlet section; 1112, a second air outlet section; 1113, a third air outlet section; 112, an air inlet passage; 1121, an air inlet; 113, an inner layer; 114, an outer layer; 115, a sandwich layer; 116, a gas guide hole; 116a, a first gas guide hole; 116b, a second gas guide hole; 12, a cover body; 13, a one-way valve; 20, a second part; 21, a heating assembly; 211, a heating cavity; 212, an opening; 213, a gas guide passage; 214, a heating cup; 2141, a cup bottom wall; 2142, a cup side wall; 215, a heating core; 2151, a heat exchange passage; 2152, a heat exchange core; 2153, a heating body; 216, a gap; 217, a flow guide part; 218, a gas collecting plate; 2181, a first side; 2182, a second side; 2183, a flow guide passage; 22, a main housing; 200, a smoking substrate. DETAILED DESCRIPTION

[0036] The present application will be further described in details through specific embodiments in combination with the drawings. In different embodiments, similar elements are denoted by similar element reference numbers. 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 for those skilled in the art to describe these related operations in detail according to the description in the specification and the general technical knowledge in the art.

[0037] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments, and the operation steps involved in each embodiment can also be sequentially adjusted or adjusted in a manner that is obvious to those skilled in the art. 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.

[0038] The serial numbers of components in this document, such as "first", "second", etc., are only used to distinguish the described objects, and have no technical meaning. Unless otherwise specified, "connection" and "coupling" in this application include direct and indirect connections (couplings).

[0039] At present, due to the limitation of design, the air inlet channel of the heat-not-burn device is too long, which causes the gas delivery to slow down. Moreover, the heat-not-burn device usually uses an aerosol product, which is provided with a filter section, a temperature reduction section, etc. in addition to a smoking substrate. After the smoking is completed, the user will throw away the entire aerosol product, thereby causing waste and increasing the user's use cost.

[0040] In view of this, the present application provides a heat-not-burn device, which can greatly shorten the length of the air inlet channel, make the gas quickly enter the heat-not-burn device, and avoid waste and reduce the user's use cost.

[0041] Please refer to Figures 1 to 4 The heat-not-burn device 100 includes a heating assembly 21 and a suction nozzle 11. The heating assembly 21 is provided with a heating cavity 211 and an opening 212 communicating with the heating cavity 211, and the heating cavity 211 is used to accommodate a smoking substrate 200. The suction nozzle 11 is provided with an air outlet channel 111 penetrating the axial direction thereof, and the air outlet channel 111 is used to be connected with the opening 212 to allow the aerosol generated by the smoking substrate 200 in the heating cavity 211 to flow out. The suction nozzle 11 is further provided with an air inlet channel 112 which is isolated from the downstream end of the air outlet channel 111, and the air inlet channel 112 communicates with the upstream end of the air outlet channel 111 and the outside, and is used to deliver the airflow from the outside to the suction nozzle 11.

[0042] In use, the heating assembly 21 heats the smoking substrate 200 located in the heating cavity 211 to generate aerosol. The aerosol can enter the air outlet channel 111 through the opening 212, and the airflow enters the air outlet channel 111 from the air inlet channel 112. After the aerosol and the airflow are mixed in the air outlet channel 111, they are inhaled by the user.

[0043] By adopting the above technical scheme, the air inlet channel 112 and the air outlet channel 111 are arranged on the suction nozzle 11, and the air inlet channel 112 communicates with the air outlet channel 111. The air inlet channel 112 does not need to be too long, and can deliver the gas from the outside to the air outlet channel 111, thereby accelerating the delivery of the gas. Moreover, the heating assembly 21 accommodates and heats the smoking substrate 200. After the smoking substrate 200 is used up, only the smoking substrate 200 needs to be replaced, and the suction nozzle 11 can continue to be used, thereby avoiding waste and reducing the user's use cost. Therefore, the heat-not-burn device 100 of the present application shortens the length of the air inlet channel 112, makes the gas quickly enter the heat-not-burn device 100, and also avoids waste and reduces the user's use cost.

[0044] Referring to Figures 1 to 4 The heat-not-burn device 100 comprises a first part 10 and a second part 20, the first part 10 comprises a suction nozzle 11, the second part 20 comprises a heating assembly 21, the first part 10 is detachably connected to the second part 20 or movably connected to the second part 20, so as to switch the heating cavity 211 between a closed state and an open state.

[0045] When the heating cavity 211 is in the closed state, the first part 10 covers the second part 20, the opening 212 is in communication with the air outlet channel 111, and the heating assembly 21 can heat the smoking substrate 200 in the heating cavity 211 to generate aerosol; when the heating cavity 211 is in the open state, the opening 212 is exposed, and the smoking substrate 200 can enter and exit the heating cavity 211 through the opening 212. That is, when the heating cavity 211 is in the closed state, the heat-not-burn device 100 can work, and the user can smoke; when the heating cavity 211 is in the open state, the user can replace the smoking substrate 200 in the heating cavity 211, and clean the heating cavity 211.

[0046] Referring to Figure 2 and Figure 3 The first part 10 further comprises a cover body 12, and the suction nozzle 11 is mounted on the cover body 12. The second part 20 further comprises a main housing 22, and the heating assembly 21 is mounted on the main housing 22. The cover body 12 is detachably connected to the main housing 22 or movably connected to the main housing 22, so as to switch the heating cavity 211 between the closed state and the open state. In a specific implementation, the cover body 12 moves relative to the main housing 22 to drive the suction nozzle 11 to move relative to the main housing 22, i.e., the suction nozzle 11 moves relative to the heating assembly 21, so that the air outlet channel 111 is in communication with the opening 212, or the opening 212 is exposed.

[0047] As an embodiment, the cover body 12 is rotationally connected to the main housing 22. By rotating the cover body 12 relative to the main housing 22, the air outlet channel 111 is in communication with the opening 212, or the opening 212 is exposed. This operation mode is simple, and it is not easy for the opening 212 to be exposed and for the first part 10 to be lost. Of course, as an alternative embodiment, the cover body 12 can be slidably connected to the main housing 22. As another alternative embodiment, the cover body 12 can be detachably connected to the main housing 22.

[0048] As an implementation, the air inlet channel 112 extends along the axial direction of the suction nozzle 11. That is, after the air enters the suction nozzle 11, it enters along the axial direction of the suction nozzle 11 and then flows out from the air outlet channel 111. Exemplarily, the air inlet channel 112 is arranged in a straight line, which is conducive to accelerating the flow of the gas. The air inlet 1121 of the air inlet channel 112 can be arranged close to the downstream end of the suction nozzle 11 and a lip section (not marked in the figure) for the user to hold for suction is reserved. In some embodiments, the air inlet channel 112 can also be arranged in a spiral around the periphery of the air outlet channel 111, which can form a vortex during the flow of the gas, thereby increasing the contact area between the air inlet channel 112 and the suction nozzle 11, to a certain extent, more heat of the aerosol in the air outlet channel 111 can be taken away, further reducing the temperature of the aerosol, and the suction resistance of the suction can also be adjusted.

[0049] As an implementation, the air inlet channel 112 is arranged around the periphery of the air outlet channel 111. In this way, the space of the air inlet channel 112 can be increased, and the flow of the gas can be accelerated. It can be understood that in other embodiments, the air inlet channel 112 and the air outlet channel 111 can also be arranged side by side.

[0050] In specific implementation, the suction nozzle 11 includes an inner layer 113, an outer layer 114, and a clamping layer 115 clamped between the inner layer 113 and the outer layer 114. The clamping layer 115 and the outer layer 114 are arranged around the periphery of the inner layer 113, and the inner layer 113 encloses the air outlet channel 111, and the clamping layer 115 and the outer layer 114 enclose the air inlet channel 112. In this way, the air outlet channel 111 can be arranged in different shapes as needed, while the air inlet channel 112 can remain linear and will not be affected by the air outlet channel 111. By arranging the air inlet channel 112 around the periphery of the air outlet channel 111, the low-temperature air entering from the outside can pre-cool the aerosol in the air outlet channel 111 before entering the air outlet channel 111, which can further improve the aerosol cooling effect. In addition, when the air inlet channel 112 is the clamping layer 115 around the air outlet channel 111, the contact area between the low-temperature air and the clamping layer 115 can be as large as possible, and the pre-cooling effect is better. In some embodiments, the air inlet 1121 can be provided with a plurality of air inlets 1121, and each air inlet 1121 penetrates the outer layer 114 and is arranged at intervals around the periphery of the outer layer 114, which can accelerate the entering speed of the air. In actual design, the suction resistance can also be adjusted to a suitable parameter range by adjusting the number of air inlets 1121.

[0051] Please refer to Figure 3 and Figure 4The air outlet passage 111 is provided with a first air outlet section 1111 and a second air outlet section 1112. The first air outlet section 1111 is used to be connected with the opening 212 to communicate the heating cavity 211 with the second air outlet section 1112. The cross-sectional area of the second air outlet section 1112 in the direction perpendicular to the axial direction of the mouthpiece 11 is smaller than the cross-sectional area of the first air outlet section 1111 in the direction perpendicular to the axial direction.

[0052] In a specific implementation, the first air outlet section 1111 is located at the upstream end of the air outlet passage 111. The air inlet passage 112 communicates with the first air outlet section 1111. The cold air enters the first air outlet section 1111 from the outside through the air inlet passage 112. The aerosol generated by heating the smoking substrate 200 enters the first air outlet section 1111 through the opening 212. The hot aerosol is mixed with the cold air in the first air outlet section 1111. After being diluted and cooled by the cold air, the aerosol is discharged through the second air outlet section 1112. The cross-sectional area of the second air outlet section 1112 in the direction perpendicular to the axial direction of the mouthpiece 11 is smaller than the cross-sectional area of the first air outlet section 1111 in the direction perpendicular to the axial direction. That is, the channel diameter of the air outlet passage 111 at the second air outlet section 1112 is smaller than the channel diameter of the first air outlet section 1111. In this way, the transmission of the aerosol and the air can be accelerated by changing the channel diameter.

[0053] Please refer to Figure 3 and Figure 4 The air outlet passage 111 is further provided with a third air outlet section 1113. The end of the second air outlet section 1112 away from the first air outlet section 1111 communicates with the third air outlet section 1113. The cross-sectional area of the second air outlet section 1112 in the direction perpendicular to the axial direction is smaller than the cross-sectional area of the third air outlet section 1113 in the direction perpendicular to the axial direction. The third air outlet section 1113 can be used to buffer the aerosol and the air, so that the aerosol and the air can be fully mixed. The aerosol is fully diffused and cooled in the third air outlet section 1113, and a plurality of particle clusters are formed. After the single aerosol particles are clustered, the concentration of the aerosol entering the user's mouth will become more full and thick.

[0054] In an embodiment, the ratio of the cross-sectional area of the second air outlet section 1112 in the direction perpendicular to the axial direction of the mouthpiece 11 to the cross-sectional area of the first air outlet section 1111 in the direction perpendicular to the axial direction is 1:64-1:16. The ratio of the cross-sectional area of the second air outlet section 1112 in the direction perpendicular to the axial direction of the mouthpiece 11 to the cross-sectional area of the third air outlet section 1113 in the direction perpendicular to the axial direction is 1:64-1:16.

[0055] In an embodiment, the transition between the first air outlet section 1111 and the second air outlet section 1112 is arc-shaped, and the transition between the third air outlet section 1113 and the second air outlet section 1112 is arc-shaped. In this way, the different air outlet sections gradually transition into one another, so as to avoid condensation of the aerosol during the transition from one air outlet section to another, while also reducing the resistance to suction.

[0056] Please refer to Figure 3 and Figure 4 The heating assembly 21 is further provided with a gas guide passage 213, one end of the gas guide passage 213 being in communication with the heating cavity 211, and the other end being in communication with the gas inlet passage 112, for conveying the gas flow from the gas inlet passage 112 to the heating cavity 211. In a specific implementation, the gas can enter the gas guide passage 213 through the gas inlet passage 112, and then enter the heating cavity 211, pass through the smoking substrate 200 in the heating cavity 211, and the aerosol generated by heating of the smoking substrate 200 enters the gas outlet passage 111 together with the gas. By arranging the gas to enter the heating cavity 211 through the gas inlet passage 112 and the gas guide passage 213, the gas can be quickly conveyed into the heating cavity 211 due to the close distance between the mouthpiece 11 and the heating assembly 21.

[0057] In an embodiment, the mouthpiece 11 is further provided with a gas guide hole 116, which can be configured to be in communication with the gas inlet passage 112 and the gas outlet passage 111, or can be configured to be in communication with the gas inlet passage 112 and the gas guide passage 213, or can be configured to be in communication with both the gas inlet passage 112 and the gas outlet passage 111, and also in communication with the gas inlet passage 112 and the gas guide passage 213.

[0058] Please refer to Figures 3 to 5 In this embodiment, the mouthpiece 11 is provided with a plurality of gas guide holes 116, part of the gas guide holes 116 being in communication with the gas inlet passage 112 and the gas guide passage 213, and part of the gas guide holes 116 being in communication with the gas inlet passage 112 and the gas outlet passage 111. For ease of description, the gas guide holes 116 in communication with the gas inlet passage 112 and the gas outlet passage 111 are defined as first gas guide holes 116a, and the gas guide holes 116 in communication with the gas inlet passage 112 and the gas guide passage 213 are defined as second gas guide holes 116b.

[0059] In an embodiment, by arranging the number and cross-sectional area of the first gas guide holes 116a and the second gas guide holes 116b, the flow distribution ratio of the gas inlet passage 112 to the gas outlet passage 111 and the gas guide passage 213 can be allocated to meet the requirements of suitable aerosol cooling and aerosol outflow speed and fullness. Exemplarily, the gas flow entering the gas outlet passage 111 is 10%-50% of the gas flow in the gas inlet passage 112, and the gas flow entering the gas guide passage 213 is 50%-90% of the gas flow in the gas inlet passage 112.

[0060] In this embodiment, the first air guide holes 116a are four, which are arranged at equal intervals around the circumference of the air outlet channel 111. Between any two adjacent first air guide holes 116a, a plurality of second air guide holes 116b are arranged.

[0061] In an embodiment, the first part 10 further comprises a one-way valve 13, such as a Tesla valve, which is at least partially installed at the first air guide hole 116a to allow gas to flow from the air inlet channel 112 to the air outlet channel 111 in one direction. In this way, the aerosol can be prevented from flowing in the reverse direction to the air inlet channel 112 and condensing in the air inlet channel 112 to cause blockage or contamination of the air inlet channel 112 and inconvenience in cleaning.

[0062] In an embodiment, the first air guide hole 116a is connected to both the air inlet channel 112 and the air outlet channel 111, and also connected to the air guide channel 213. The one-way valve 13 also functions as a three-way flow valve, with one inlet end connected to the first air guide hole 116a of the downstream end of the air inlet channel 112, one outlet end connected to the upstream end of the air outlet channel 111, and the other outlet end connected to the upstream end of the air guide channel 213. Specifically, the one-way valve 13 is configured such that the gas flow through the one-way valve 13 into the air outlet channel 111 is 10%-50% of the gas flow in the air inlet channel 112, and the gas flow through the one-way valve 13 into the air guide channel 213 is 50%-90% of the gas flow in the air inlet channel 112. In this way, it can be ensured that the aerosol can be sucked into the suction nozzle 11 by the air pressure; in addition, since the hot air itself has a certain expansion, even if no differential flow is made, there is a certain negative pressure in the space surrounded by the air outlet channel 111 and the heating cavity 211, which ensures that the aerosol can be sucked.

[0063] Please refer to Figure 3 and Figure 4 The heating assembly 21 comprises a heating cup 214 and a heating core 215. The heating cup 214 is provided with a heating cavity 211, an opening 212, and an air guide channel 213. The heating core 215 is accommodated in the heating cavity 211 away from the opening 212 and is provided with a plurality of heat exchange channels 2151. The smoking substrate 200 is accommodated in the heating cavity 211 close to the opening 212. The heating core 215 is used to carry the smoking substrate 200 and generate heat after being powered on. In specific implementation, the airflow enters the heating cavity 211 through the air inlet channel 112 and the air guide channel 213 in sequence, and then enters the heat exchange channels 2151. After the heating core 215 is powered on, heat is generated to heat the airflow in the heat exchange channels 2151 to generate hot airflow, which flows into the smoking substrate 200 to heat the smoking substrate 200 to generate aerosol.

[0064] Please refer to Figure 4The heating cup 214 comprises a cup bottom wall 2141 and a cup side wall 2142, the cup bottom wall 2141 is connected to one end of the cup side wall 2142, and the cup bottom wall 2141 and the cup side wall 2142 enclose a heating cavity 211, and the opening 212 is located at the end of the cup side wall 2142 away from the cup bottom wall 2141; the air guide channel 213 is formed in the cup side wall 2142 and is arranged around the periphery of the heating cavity 211. By arranging the air guide channel 213 around the periphery of the heating cavity 211, on the one hand, the space of the air guide channel 213 can be increased, and the gas flow can be accelerated; on the other hand, the gas can flow into the heating cavity 211 from the circumference of the heating cavity 211, so as to improve the uniformity of the gas flow into the heating cavity 211.

[0065] Please refer to Figure 4 and Figure 6 The heating core 215 comprises a heat exchange core 2152 and a heating body 2153, the heat exchange core 2152 is accommodated in the end of the heating cavity 211 close to the cup bottom wall 2141, the heating body 2153 is arranged around the circumference of the heat exchange core 2152, and is used for generating heat after being electrified; the heat exchange core 2152 is provided with a plurality of heat exchange channels 2151. In specific implementation, the heating body 2153 generates heat after being electrified, and the heat is transmitted to the heat exchange core 2152, so as to heat the gas flow in the heat exchange channel 2151.

[0066] In an embodiment, the heating core 215 is accommodated in the end of the heating cavity 211 close to the cup bottom wall 2141, and has a gap 216 between the heating core 215 and the cup bottom wall 2141; the heat exchange channel 2151 is communicated with the gap 216 and the end of the heating cavity 211 away from the cup bottom wall 2141, the end of the heating cavity 211 away from the cup bottom wall 2141 is used for accommodating the smoking substrate 200, and the air guide channel 213 is communicated with the gap 216. By arranging the gap 216 between the heating core 215 and the cup bottom wall 2141, the air outlet of the air guide channel 213 can be prevented from being blocked by the heating core 215, and the gas flow from the air guide channel 213 into the heating cavity 211 is facilitated.

[0067] It should be noted that when the smoking substrate 200 is accommodated in the heating cavity 211, the smoking substrate 200 does not exceed the top end of the cup side wall 2142 (i.e. the end of the cup side wall 2142 away from the cup bottom wall 2141), and preferably, the smoking substrate 200 is lower than the top end of the cup side wall 2142. In this way, the part of the heating cup 214 above the smoking substrate 200 and the air outlet channel 111 of the mouthpiece 11 can be used as an aerosol cooling and buffering space, the aerosol cooling space can be increased, and the cooling effect can be improved.

[0068] Please refer to Figure 3 , Figure 4 and Figure 6The heating assembly 21 further comprises a flow guide portion 217 protruding from the cup bottom wall 2141 towards the gap 216 and having a guide surface for guiding the airflow from the air guide channel 213 to the heating core 215. In a specific implementation, the flow guide portion 217 is located at the middle portion of the cup bottom wall 2141, and the guide surface is an inclined surface, which can be a slope or an arc surface. By providing the flow guide portion 217, the airflow from the air guide channel 213 can be divided and rectified, and the airflow can be quickly introduced.

[0069] Referring to Figure 3 , Figure 4 and Figure 7 , the heating assembly 21 further comprises a gas collecting plate 218 arranged at the end of the heating core 215 away from the cup bottom wall 2141 and used for carrying the smoking substrate 200. The gas collecting plate 218 comprises a first side 2181 and a second side 2182 arranged oppositely, the first side 2181 faces the heating core 215, and the gas collecting plate 218 is provided with a plurality of flow guide channels 2183 penetrating through the heat exchange channels 2151 along a direction from the first side 2181 to the second side 2182, and the cross-sectional area of the flow guide channels 2183 gradually decreases along the direction from the first side 2181 to the second side 2182. In this way, by changing the cross-sectional area of the flow guide channels 2183, the flow rate of the airflow can be accelerated.

[0070] In an embodiment, the ratio of the cross-sectional area of the flow guide channels 2183 at the second side 2182 to the cross-sectional area of the flow guide channels 2183 at the first side 2181 is 1:25-1:4.

[0071] In an embodiment, the cross section of the flow guide channels 2183 is circular. It can be understood that in other embodiments, the cross section can also be elliptical, triangular or polygonal.

[0072] In an embodiment, the flow guide channels 2183 correspond to the heat exchange channels 2151 one by one. In this way, the airflow in the heat exchange channels 2151 can quickly enter the smoking substrate 200 through the flow guide channels 2183.

[0073] Referring to Figures 1 to 3 , the present application further provides an aerosol generating system comprising the smoking substrate 200 and the above-mentioned heat-not-burn device 100, and the smoking substrate 200 is detachably accommodated in the heating cavity 211. The smoking substrate 200 can be a smoking material wrapped by cigarette paper, or can be a shaped member with a porous interior or an aerosol passage penetrating through the axial two ends.

[0074] In one embodiment, the smoking substrate 200 is a shaped body with micro-holes formed inside, i.e. a tobacco core, for example, the smoking substrate 200 is made of tobacco or non-tobacco smoking material and smoking agents, spices, etc. Illustratively, the smoking substrate 200 can first be mixed with tobacco powder or other plant powder, a certain proportion of polyhydric alcohol, spices and adhesives, etc. to form an aerosol generating substrate precursor polymer; then a certain volume or weight of the polymer is put into a mold, and under the action of pressure, the volume ratio of the aerosol generating substrate precursor polymer before and after compression is 10:3-6:1, demolding is performed to form a one-piece tobacco core with micro-holes formed inside for aerosol to pass through. Further, the mold structure can also be designed so that after the tobacco core is demolded, the inside of the tobacco core is formed with airway holes penetrating through the axial ends thereof for the collection and transmission of aerosol, when the tobacco core is heated, the aerosol is formed in the micro-holes, under the suction force of the user, the aerosol is gathered into the airway holes and then sucked out along the airway holes. In other embodiments, the tobacco core can also be formed by extrusion.

[0075] In one embodiment, the wall material microstructure of the tobacco core is radially distributed with disordered micro-holes between layers, and the micro-holes are irregular polygons. Illustratively, the porosity of the micro-holes of the tobacco core is 20%-80%, and the micro-hole diameter is 50nm-20μm.

[0076] The above uses specific examples to describe 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 heat-not-burn device, characterized in that, The heating assembly is provided with a heating cavity for accommodating a smoking substrate and an opening communicating with the heating cavity; and The mouthpiece is provided with an air outlet channel penetrating through the axial direction of the mouthpiece, the air outlet channel is used for being connected with the opening to allow the aerosol generated by the smoking substrate in the heating cavity to flow out; and The mouthpiece is further provided with an air inlet channel which is isolated from the downstream end of the air outlet channel and communicates with the upstream end of the air outlet channel and the outside, and is used for conveying the airflow from the outside to the mouthpiece. The heating non-combustion device comprises a first part and a second part, the first part comprises the mouthpiece, and the second part comprises the heating assembly, the first part is detachably connected to the second part or movably connected to the second part to switch the heating cavity between a closed state and an open state; When the heating cavity is in the closed state, the first part covers the second part, the opening is connected with the air outlet channel, and the heating assembly can heat the smoking substrate in the heating cavity to generate aerosol; 2. The heat-not-burn device of claim 1, wherein When the heating cavity is in the open state, the opening is exposed, and the smoking substrate can enter and exit the heating cavity through the opening. The air inlet channel extends along the axial direction of the mouthpiece; and / or, the air inlet channel is arranged around the periphery of the air outlet channel. The air outlet channel is provided with a first air outlet section and a second air outlet section; 3. The heat-not-burn device of claim 1, wherein, The first air outlet section is used for being connected with the opening to communicate the heating cavity and the second air outlet section, and the cross-sectional area of the second air outlet section in the direction perpendicular to the axial direction of the mouthpiece is smaller than the cross-sectional area of the first air outlet section in the direction perpendicular to the axial direction.

4. The heat-not-burn device of claim 1, wherein, The air outlet channel is further provided with a third air outlet section, one end of the second air outlet section away from the first air outlet section communicates with the third air outlet section, and the cross-sectional area of the second air outlet section in the direction perpendicular to the axial direction is smaller than the cross-sectional area of the third air outlet section in the direction perpendicular to the axial direction. The heating assembly is further provided with an air guide channel, one end of the air guide channel communicates with the heating cavity, and the other end of the air guide channel communicates with the air inlet channel, and is used for conveying the airflow from the air inlet channel to the heating cavity.

5. The heat-not-burn device of claim 4, wherein The heating assembly comprises a heating cup and a heating core; 6. A heat-not-burn device according to any one of claims 1 to 5, wherein, The heating cup comprises a cup bottom wall and a cup side wall, the cup bottom wall is connected to one end of the cup side wall, and the cup bottom wall and the cup side wall form the heating cavity, and the opening is located at one end of the cup side wall away from the cup bottom wall; the air guide channel is formed in the cup side wall and arranged around the periphery of the heating cavity; 7. The heat-not-burn device of claim 6, wherein The heating core is accommodated in one end of the heating cavity close to the cup bottom wall, and has a gap between the heating core and the cup bottom wall, and the heating core is used for generating heat after being electrified; The heating core is provided with a plurality of heat exchange channels, the heat exchange channels communicate the gap and one end of the heating cavity away from the cup bottom wall, one end of the heating cavity away from the cup bottom wall is used for accommodating the smoking substrate, and the air guide channel communicates the gap. The heating assembly further comprises a flow guide part; ​ 8. The heat-not-burn device of claim 7, wherein, ​ The flow guide part is protruded from a side of the cup bottom wall facing the gap, and has a guide surface for guiding the airflow entering from the air guide channel to the heating core.

9. The heat-not-burn device of claim 7, wherein, The heating assembly further comprises a gas collecting plate arranged at an end of the heating core away from the cup bottom wall, for carrying the smoking substrate; The gas collecting plate comprises a first side and a second side arranged oppositely, the first side facing the heating core; a plurality of flow guide channels communicating with the heat exchange channels are arranged through the gas collecting plate along a direction from the first side to the second side; The cross-sectional area of the flow guide channels gradually decreases along the direction from the first side to the second side.

10. An aerosol-generating system comprising, A heat-not-burn device as claimed in any one of claims 1 to 9, and a smoking substrate removably accommodated in the heating cavity.

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