Heat-not-burn device and aerosol-generating system
By incorporating the switching between aerobic and anaerobic heating modes and the replaceable smoke-generating substrate in the heated non-combustible device, the problems of single heating method and high cost are solved, achieving flexible use and cost reduction.
Patent Information
- Application Number
- CN202423089814.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-12-13
AI Technical Summary
Existing heating non-combustion devices have a single heating method, which cannot meet the diverse needs of users, and the user cost is high.
Design a heating non-combustion device with two modes: oxygen-rich heating and oxygen-free heating. By setting different air intake channels and switching components in the nozzle and main unit, the heating mode can be flexibly switched, and the operating cost can be reduced by changing the smoke-generating substrate.
It improves the user experience, increases the flexibility of the device, and reduces operating costs by allowing for the replacement of the smoke-generating substrate.
Smart Images
Figure CN223730732U_ABST
Abstract
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] The heat-not-burn device is a device for heating an aerosol generating article to generate an aerosol. According to the heating mode of the aerosol generating article in the heat-not-burn device, the heat-not-burn device can be divided into an oxygen-free heating type and an oxygen-containing heating type. The oxygen-free heating refers to that the gas from outside into the heat-not-burn device does not pass through the smoking segment of the aerosol generating article, but is mixed with the high-temperature aerosol generated by the smoking segment and then is inhaled by the user, which achieves the purpose of heat-not-burn by reducing the oxygen content. The oxygen-containing heating refers to that the gas from outside into the heat-not-burn device passes through the smoking segment of the aerosol generating article, and the high-temperature aerosol generated by the smoking segment is taken out of the aerosol generating article, which achieves the purpose of heat-not-burn by reducing the heating temperature. However, different heat-not-burn devices with different heating modes will bring different user experiences. In actual use, a single heat-not-burn device may not be able to meet the user's needs. SUMMARY
[0003] The present application provides a heat-not-burn device and an aerosol generating system, aiming to solve the technical problems of single heating mode and high user cost of the existing heat-not-burn device.
[0004] According to a first aspect of the present application, a heat-not-burn device is provided in an embodiment, comprising:
[0005] a host;
[0006] a heating assembly provided with a heating cavity for accommodating a smoking substrate and an opening communicating with the heating cavity, the heating assembly being mounted on the host and used for heating the smoking substrate in the heating cavity to generate an aerosol;
[0007] a mouthpiece provided with an air outlet channel, the air outlet channel being correspondingly arranged with the opening and used for communicating with the heating cavity to allow the aerosol from the heating cavity to flow out;
[0008] wherein the mouthpiece is further provided with a first air inlet channel, the first air inlet channel communicating the air outlet channel with the outside; the host is further provided with a second air inlet channel, the second air inlet channel communicating the heating cavity with the outside; and the heat-not-burn device further comprises a switch assembly, the switch assembly being used for controlling the on-off of the second air inlet channel.
[0009] In an embodiment, the heat-not-burn device further comprises a one-way valve, the one-way valve being used to allow the gas to flow from the first air inlet channel into the air outlet channel in one direction.
[0010] In one embodiment, the heat-not-burn device further comprises a cover body, and the mouthpiece is mounted on the cover body;
[0011] The cover body is capable of covering the main body so as to switch the heating cavity between a closed state and an open state;
[0012] When the heating cavity is in the closed state, the mouthpiece is in abutment communication with the heating assembly, and the heating assembly is capable of heating the smoking substrate located in the heating cavity to generate aerosol;
[0013] When the heating cavity is in the open state, the opening is exposed, and the smoking substrate is capable of entering and exiting the heating cavity through the opening.
[0014] In one embodiment, the cover body is rotationally connected to the main body, and the mouthpiece is selectively in abutment and separation with the heating assembly through rotational cooperation of the cover body and the main body.
[0015] In one embodiment, the air outlet channel extends along the axial direction of the mouthpiece, and the first air inlet channel is arranged in the circumferential direction of the air outlet channel.
[0016] In one embodiment, the mouthpiece comprises an inner layer, an outer layer, and a cladding layer cladded between the inner layer and the outer layer, the cladding layer and the outer layer are arranged in the circumferential direction of the inner layer, the inner layer forms the air outlet channel, and the cladding layer and the outer layer form the first air inlet channel.
[0017] In one embodiment, the air inlet of the first air inlet channel is close to the downstream end of the air outlet channel and located outside the cover body.
[0018] In one embodiment, the air outlet of the first air inlet channel is close to the upstream end of the air outlet channel, the upstream end of the air outlet channel has a horn mouth facing the heating cavity, and the horn mouth is in abutment communication with the air outlet of the first air inlet channel.
[0019] In one embodiment, the heating assembly comprises a heating cup.
[0020] 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 forms the heating cavity together with the cup side wall, the opening is located at one end of the cup side wall away from the cup bottom wall, and the second air inlet channel is in communication with one end of the heating cavity close to the cup bottom wall.
[0021] According to the second aspect of the present application, in one embodiment, an aerosol generating system is provided, comprising a smoking substrate and the heat-not-burn device of the above-mentioned first aspect, and the smoking substrate is contained in the heating cavity.
[0022] According to the heating non-combustion device and the aerosol generating system provided in the above embodiments, the first air inlet channel is arranged on the mouthpiece and is used to guide the gas from the outside to the air outlet channel. The gas can mix with the high-temperature aerosol entering the air outlet channel, thereby reducing the temperature of the high-temperature aerosol. The second air inlet channel is arranged on the main machine and is used to guide the gas from the outside to the heating cavity. The gas can flow through the smoking substrate in the heating cavity, thereby realizing aerobic heating. The switch assembly is arranged to control the opening and closing of the second air inlet channel. When the second air inlet channel is connected, aerobic heating is realized. When the second air inlet channel is disconnected, no gas flows through the smoking substrate in the heating cavity. The high-temperature aerosol generated by the smoking substrate mixes with the gas entering the air outlet channel through the first air inlet channel, thereby realizing anaerobic heating. Therefore, the heating non-combustion device provided in the present application has two heating modes, namely aerobic heating and anaerobic heating. The heating non-combustion device is more flexible to use, thereby improving the user experience. In addition, the heating assembly contains and heats the smoking substrate. After the smoking substrate is used up, only the smoking substrate needs to be replaced, and the mouthpiece can continue to be used. In this way, waste can be avoided, and the user's use cost can be reduced. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 A state diagram of the aerosol generating system provided in the embodiments of the present application when the heating cavity is in a closed state;
[0024] Figure 2 A state diagram of the aerosol generating system provided in the embodiments of the present application when the heating cavity is in an open state;
[0025] Figure 3 A sectional view of the aerosol generating system provided in the embodiments of the present application;
[0026] Figure 4 A Figure 3 A local enlarged view of position A in FIG. 6;
[0027] Figure 5 An assembly structure schematic diagram of the mouthpiece and the one-way valve provided in the embodiments of the present application;
[0028] Figure 6 An exploded view of the heat exchange core and the heating body provided in the embodiments of the present application.
[0029] In the drawings:
[0030] 100, a heat-not-burn device; 10, a main machine; 11, a second air inlet channel; 20, a heating assembly; 21, a heating cup; 211, a cup bottom wall; 212, a cup side wall; 213, a heating cavity; 214, an opening; 215, a through hole; 22, a heat exchange core; 221, a heat exchange channel; 23, a heating body; 30, a suction nozzle; 31, an air outlet channel; 311, a horn mouth; 32, a first air inlet channel; 321, an air inlet; 322, an air outlet; 33, an inner layer; 34, an outer layer; 35, a sandwich layer; 40, a switch assembly; 41, a switch valve; 50, a cover body; 60, a one-way valve; 200, a smoking substrate. DETAILED DESCRIPTION
[0031] The application will be further described below in details with specific embodiments and accompanying drawings. In different embodiments, similar elements are denoted by similar reference numerals. In the following embodiments, many details are described in order to make the application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different cases, or can be replaced by other elements, materials, methods. In some cases, some operations related to the application are not shown or described in the specification, in order to avoid the core part of the application being overwhelmed by too much description, and those skilled in the art can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.
[0032] 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 those 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.
[0033] 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 this application include direct and indirect connections (couplings) unless otherwise specified.
[0034] At present, heat-not-burn devices can be divided into oxygen-free heating type and oxygen-containing heating type heat-not-burn devices. With people's increasingly high requirements for heat-not-burn devices, single heating type heat-not-burn devices gradually cannot meet the use requirements of users.
[0035] In view of this, the application provides a heat-not-burn device to improve the flexibility of the heat-not-burn device and improve the user experience.
[0036] Please refer toFigures 1 to 4 The heating non-combustion device 100 provided by the application comprises a main machine 10, a heating assembly 20 and a suction nozzle 30. The heating assembly 20 is provided with a heating cavity 213 for accommodating a smoking substrate 200 and an opening 214 communicating with the heating cavity 213, and the heating assembly 20 is installed on the main machine 10 and used for heating the smoking substrate 200 in the heating cavity 213 to generate aerosol. The suction nozzle 30 is provided with an air outlet channel 31 corresponding to the opening 214 and used for communicating with the heating cavity 213 to allow the aerosol from the heating cavity 213 to flow out. The suction nozzle 30 is further provided with a first air inlet channel 32 communicating with the air outlet channel 31 and the outside, the main machine 10 is further provided with a second air inlet channel 11 communicating with the heating cavity 213 and the outside, and the heating non-combustion device 100 further comprises a switch assembly 40 used for controlling the opening and closing of the second air inlet channel 11.
[0037] In use, when the switch assembly 40 controls the second air inlet channel 11 to be closed, the gas flows into the first air inlet channel 32 from the outside under the negative pressure generated by the user sucking the suction nozzle 30, and then flows into the air outlet channel 31. A pressure difference is generated between the air outlet channel 31 and the heating cavity 213 to form a negative pressure, and under the action of the negative pressure, the aerosol generated by heating the smoking substrate 200 is accelerated to be sucked into the air outlet channel 31 through the opening 214, and the air outlet channel 31 and the cold air are mixed and cooled. In this way, the gas flow does not pass through the smoking substrate 200, and the purpose of heating non-combustion is achieved by reducing the oxygen content to perform oxygen-free heating. When the switch assembly 40 controls the second air inlet channel 11 to be opened, part of the gas flows into the first air inlet channel 32 from the outside, and then flows into the air outlet channel 31. Part of the gas flows into the second air inlet channel 11 from the outside, and then flows into the heating cavity 213. The high-temperature air generated after being heated heats the smoking substrate 200 through the smoking substrate 200, and the aerosol generated by heating the smoking substrate 200 is mixed and cooled with the air in the air outlet channel 31, and then flows out through the suction nozzle 30. In this way, the gas flow passes through the smoking substrate 200 to perform aerobic heating.
[0038] By means of the above technical scheme, the first air inlet channel 32 is arranged on the suction nozzle 30, and the first air inlet channel 32 is used to guide gas from the outside to the air outlet channel 31. The gas entering the air outlet channel 31 can mix with the high-temperature aerosol entering the air outlet channel 31, thereby playing a role in cooling the high-temperature aerosol. The second air inlet channel 11 is arranged on the main machine 10, and the second air inlet channel 11 can guide gas from the outside to the heating cavity 213. The gas flowing through the smoking substrate 200 in the heating cavity 213 realizes aerobic heating. The on-off of the second air inlet channel 11 is controlled by the switch assembly 40. When the second air inlet channel 11 is connected, aerobic heating is realized. When the second air inlet channel 11 is disconnected, no gas flows through the smoking substrate 200 in the heating cavity 213. The high-temperature aerosol generated by the smoking substrate 200 enters the air outlet channel 31 and mixes with the gas entering the air outlet channel 31 through the first air inlet channel 32, thereby realizing anaerobic heating. Therefore, the heating-not-burning device 100 has two heating modes, namely aerobic heating and anaerobic heating. The heating-not-burning device 100 is more flexible to use, and the user experience is improved. In addition, the heating assembly 20 contains 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 30 can continue to be used. In this way, waste can be avoided, and the user's use cost is reduced.
[0039] In an embodiment, the switch assembly 40 includes a switch valve 41 for controlling the on-off of the second air inlet channel 11. In a specific implementation, the switch valve 41 can be arranged at any position of the second air inlet channel 11 according to design requirements.
[0040] In an embodiment, the switch assembly 40 further includes an operation button (not labeled in the figure) or a key (not labeled in the figure). The opening and closing of the switch valve 41 are controlled by operation, thereby realizing the switching of aerobic and anaerobic heating.
[0041] Please refer to Figures 1 to 4 The heating-not-burning device 100 further includes a cover body 50, and the suction nozzle 30 is mounted on the cover body 50. The cover body 50 can be covered on the main machine 10, so as to switch the heating cavity 213 between a closed state and an open state. When the heating cavity 213 is in the closed state, the suction nozzle 30 is connected to the heating assembly 20, and the heating assembly 20 can heat the smoking substrate 200 in the heating cavity 213 to generate aerosol. When the heating cavity 213 is in the open state, the opening 214 is exposed, and the smoking substrate 200 can enter and exit the heating cavity 213 through the opening 214.
[0042] In implementation, the movement of the cover 50 drives the movement of the mouthpiece 30, so as to switch the heating cavity 213 between the closed state and the open state. When the heating cavity 213 is in the closed state, the heat-not-burn device 100 can work, and the user can perform puffing. When the heating cavity 213 is in the open state, the user can replace the smoking substrate 200 in the heating cavity 213, and clean the heating cavity 213.
[0043] In an embodiment, the cover 50 is rotationally connected to the main machine 10, and the mouthpiece 30 is selectively docked with and separated from the heating assembly 20 through the rotational cooperation of the cover 50 and the main machine 10. In implementation, the cover 50 rotates relative to the main machine 10, driving the rotation of the mouthpiece 30 relative to the main machine 10, i.e., the rotation of the mouthpiece 30 relative to the heating assembly 20, so as to switch the heating cavity 213 between the closed state and the open state. This kind of operation mode is simple, and the cover 50 is not easy to be lost when the heating cavity 213 is in the open state. Of course, in specific applications, as an alternative embodiment, the cover 50 can also be slidingly connected to the main machine 10. As another alternative embodiment, the cover 50 can also be detachably connected to the main machine 10.
[0044] In an embodiment, the air outlet passage 31 extends along the axial direction of the mouthpiece 30, and the first air inlet passage 32 is arranged around the circumference of the air outlet passage 31. In this way, the space of the first air inlet passage 32 can be increased, and the gas flow can be accelerated. Moreover, by arranging the first air inlet passage 32 around the circumference of the air outlet passage 31, the low-temperature air entering from the outside can pre-cool the aerosol in the air outlet passage 31 before entering the air outlet passage 31, which can further improve the cooling effect of the aerosol. It can be understood that in other embodiments, the first air inlet passage 32 and the air outlet passage 31 can also be arranged side by side.
[0045] Please refer to Figure 3 and Figure 4 , the mouthpiece 30 includes an inner layer 33, an outer layer 34, and a clamping layer 35 clamped between the inner layer 33 and the outer layer 34. The clamping layer 35 and the outer layer 34 are arranged around the circumference of the inner layer 33, the inner layer 33 forms the air outlet passage 31, and the clamping layer 35 and the outer layer 34 form the first air inlet passage 32. In this way, the air outlet passage 31 can be arranged in different shapes as needed, and the first air inlet passage 32 can be arranged in any other shape without being affected by the air outlet passage 31. In addition, when the first air inlet passage 32 is the clamping layer 35 around the air outlet passage 31, the contact area of the low-temperature air with the clamping layer 35 can be as large as possible, which can achieve a better pre-cooling effect.
[0046] In an embodiment, the first air inlet channel 32 can be linear, which facilitates the flow of the gas. In another embodiment, the first air inlet channel 32 can be spirally arranged around the periphery of the air outlet channel 31, which can form a vortex during the flow of the gas, thereby increasing the contact area between the first air inlet channel 32 and the suction nozzle 30, and to some extent, can take away more heat of the aerosol in the air outlet channel 31, further reducing the temperature of the aerosol, and also adjusting the suction resistance.
[0047] In an embodiment, the air inlet 321 of the first air inlet channel 32 is close to the downstream end of the air outlet channel 31 and is located outside the cover 50. In this way, no additional air flow channel is needed to be arranged on the cover 50 to communicate the outside and the first air inlet channel 32, and the first air inlet channel 32 can directly communicate the outside and the air outlet channel 31, which accelerates the production efficiency of the device and also accelerates the delivery of the gas. Of course, in other embodiments, the air inlet 321 of the first air inlet channel 32 can be away from the downstream end of the air outlet channel 31 and located inside the cover 50, which needs to be additionally arranged on the cover 50 to communicate the outside and the first air inlet channel 32. In some embodiments, the air inlet 321 can be provided with a plurality of air inlets 321, each air inlet 321 penetrating the outer layer 34 and being arranged at intervals around the circumference of the outer layer 34, which can accelerate the entering speed of the air, and in actual design, the suction resistance can also be adjusted to a suitable parameter range by adjusting the number of air inlets 321.
[0048] In an embodiment, the air outlet 322 of the first air inlet channel 32 is close to the upstream end of the air outlet channel 31, and the upstream end of the air outlet channel 31 has a flared mouth 311 facing the heating cavity 213, and the flared mouth 311 is connected to the air outlet 322 of the first air inlet channel 32. By arranging the flared mouth 311 at the upstream end of the air outlet channel 31, the diameter of the air outlet channel 31 can be changed, thereby facilitating the transmission speed of the gas. By arranging the flared mouth 311 to connect the air outlet 322 of the first air inlet channel 32, the communication between the first air inlet channel 32 and the air outlet channel 31 is achieved. Moreover, in this way, the travel of the cold air in the air outlet channel 31 after entering the air outlet channel 31 from the first air inlet channel 32 is as long as possible, so that the aerosol can be fully mixed with the cold air, which is conducive to the cooling of the aerosol.
[0049] Please refer to Figure 1 , Figure 4 and Figure 5The heating-not-burning device 100 further comprises a one-way valve 60 for allowing airflow to flow from the first air inlet channel 32 to the air outlet channel 31 in one direction. In this way, the aerosol can be prevented from flowing in the reverse direction to the first air inlet channel 32 and condensing in the first air inlet channel 32 to cause blockage or contamination of the first air inlet channel 32 and inconvenience in cleaning. In a specific implementation, the one-way valve 60 can be arranged at the air outlet 322 of the first air inlet channel 32 or in the first air inlet channel 32.
[0050] In an embodiment, the one-way valve 60 can be a Tesla valve arranged at the air outlet 322 of the first air inlet channel 32. The Tesla valve does not require complex components to cooperate and only needs to be made in a specific shape to achieve one-way airflow, and thus is suitable for airflow control in a small volume and does not need to worry about the situation that the components in a traditional one-way valve are damaged and cannot work normally.
[0051] Referring to Figure 3 and Figure 4 The heating assembly 20 comprises a heating cup 21, which comprises a cup bottom wall 211 and a cup side wall 212. The cup bottom wall 211 is connected to one end of the cup side wall 212 and encloses the cup side wall 212 to form a heating cavity 213. An opening 214 is located at the end of the cup side wall 212 away from the cup bottom wall 211. The second air inlet channel 11 is connected to the end of the heating cavity 213 close to the cup bottom wall 211. In a specific implementation, the cup bottom wall 211 can be provided with a through hole 215, and the air outlet end of the second air inlet channel 11 is connected to the through hole 215.
[0052] Referring to Figure 3 , Figure 4 and Figure 6 The heating assembly 20 further comprises a heat exchange core 22 and a heating body 23. The heat exchange core 22 is accommodated in the end of the heating cavity 213 close to the cup bottom wall 211, and the heating body 23 is arranged in a circumferential direction of the heat exchange core 22 for generating heat after being powered on. The heat exchange core 22 is provided with a plurality of heat exchange channels 221. In a specific implementation, the heating body 23 generates heat after being powered on, and the heat is transferred to the heat exchange core 22, so that the airflow in the heat exchange channels 221 is heated to generate hot airflow, and the hot airflow flows into the smoking substrate 200 to heat the smoking substrate 200 to generate aerosol.
[0053] It can be understood that in other embodiments, the heating assembly 20 can not be provided with the heat exchange core 22, and the heating body 23 is arranged on the cup bottom wall 211 and / or the cup side wall 212 to generate heat after being powered on. The heat is transferred to the heating cup 21, and the heating cup 21 performs circumferential heating on the smoking substrate 200 located therein to generate aerosol.
[0054] In one embodiment, when the smoking substrate 200 is accommodated in the heating cavity 213, the smoking substrate 200 can not exceed the top end of the cup side wall 212 (i.e. the end of the cup side wall 212 away from the cup bottom wall 211), preferably, the smoking substrate 200 is lower than the top end of the cup side wall 212. In this way, the part of the heating cup 21 above the smoking substrate 200 and the air outlet passage 31 of the mouthpiece 30 can all serve as the aerosol cooling and buffering space, which can increase the aerosol cooling space and improve the cooling effect.
[0055] Please refer to Figures 1 to 3 The embodiments of the present application also provide an aerosol generating system, which comprises the smoking substrate 200 and the above-mentioned heat-not-burn device 100, and the smoking substrate 200 is accommodated in the heating cavity 213. The smoking substrate 200 can be a smoking material wrapped by cigarette paper, or a shaped piece with a porous structure.
[0056] In one embodiment, the smoking substrate 200 is a shaped piece with micropores, i.e. a tobacco core. For example, the smoking substrate 200 is made of tobacco or non-tobacco smoking material, smoking agent, flavoring agent, etc. For example, the smoking substrate 200 can be first made of tobacco powder or other plant powder mixed with a certain proportion of polyhydric alcohol, flavoring agent and adhesive, etc. to form an aerosol generating substrate precursor polymer. Then, a certain volume or weight of the polymer is put into a mold, and the volume ratio of the polymer before and after compression is 10:3-6:1 under the action of pressure. After demolding, a one-piece shaped tobacco core is formed, and the tobacco core has micropores for aerosol passing. Further, the mold structure can be designed such that, after demolding to form the tobacco core, the tobacco core has a gas passage hole penetrating through the two axial ends of the tobacco core for collecting and transmitting the aerosol. When the tobacco core is heated, the aerosol is formed in the micropores, and under the suction of the user, the aerosol is gathered into the gas passage hole and then sucked out along the gas passage hole. In other embodiments, the tobacco core can also be extruded.
[0057] In one embodiment, the wall material of the tobacco core has a microstructure of micropores with a radial interlayer disorder distribution and an irregular polygonal shape. For example, the porosity of the micropores of the tobacco core is 20%-80%, and the pore size of the micropores is 50 nm-20 μm.
[0058] The above describes the present application by using specific examples, which is only used to help understand the present application and does not limit the present application. According to the idea of the present application, those skilled in the art of the present application can make some simple deductions, modifications or substitutions.
Claims
1. A heat-not-burn device, characterized in that, The heating non-combustion device comprises: a main body; a heating assembly provided with a heating cavity for accommodating a smoking substrate and an opening communicating with the heating cavity, the heating assembly being mounted on the main body and used for heating the smoking substrate in the heating cavity to generate aerosol; a mouthpiece provided with an air outlet channel corresponding to the opening and used for communicating with the heating cavity to allow the aerosol from the heating cavity to flow out; wherein the mouthpiece is further provided with a first air inlet channel communicating the air outlet channel with the outside; the main body is further provided with a second air inlet channel communicating the heating cavity with the outside; the heating non-combustion device further comprises a switch assembly used for controlling the opening and closing of the second air inlet channel.
2. The heat-not-burn device of claim 1, wherein The heating non-combustion device further comprises a one-way valve used for allowing gas to flow from the first air inlet channel into the air outlet channel in one direction.
3. The heat-not-burn device of claim 1, wherein, The heating non-combustion device further comprises a cover body, and the mouthpiece is mounted on the cover body; the cover body can be closed on the main body to switch the heating cavity between a closed state and an open state; when the heating cavity is in the closed state, the mouthpiece is in butt joint communication with the heating assembly, and the heating assembly can heat the smoking substrate in the heating cavity to generate aerosol; 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.
4. The heat-not-burn device of claim 3, wherein The cover body is rotationally connected to the main body, and the mouthpiece is selectively in butt joint and separation with the heating assembly through the rotation of the cover body and the main body.
5. The heat-not-burn device of claim 3, wherein The air outlet channel extends along the axial direction of the mouthpiece, and the first air inlet channel is arranged in the circumferential direction of the air outlet channel.
6. The heat-not-burn device of claim 5, wherein The mouthpiece comprises an inner layer, an outer layer and a clamping layer clamped between the inner layer and the outer layer, the clamping layer and the outer layer are arranged in the circumferential direction of the inner layer, the inner layer forms the air outlet channel, and the clamping layer and the outer layer form the first air inlet channel.
7. The heat-not-burn device of claim 5, wherein The air inlet of the first air inlet channel is close to the downstream end of the air outlet channel and located outside the cover body.
8. The heat-not-burn device of claim 5, wherein, The air outlet of the first air inlet channel is close to the upstream end of the air outlet channel, the upstream end of the air outlet channel has a horn mouth facing the heating cavity, and the horn mouth is in butt joint communication with the air outlet of the first air inlet channel.
9. A heat-not-burn device according to any one of claims 1 to 8, wherein, The heating assembly comprises a heating cup; 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 forms the heating cavity together with the cup side wall, and the opening is located at the end of the cup side wall away from the cup bottom wall; the second air inlet channel communicates with one end of the heating cavity close to the cup bottom wall.
10. An aerosol-generating system comprising, The heating non-combustion device comprises a smoking substrate and a heating non-combustion device as claimed in any one of claims 1 to 9, and the smoking substrate is accommodated in the heating cavity.