A HNB cigarette
By designing a multi-layered symmetrical cooling chamber structure in the HNB cigarette, the flue gas is repeatedly dispersed and converged in each cooling chamber, which solves the problem of excessively high flue gas temperature and achieves uniform cooling and improved cost-effectiveness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JILIN TOBACCO IND CO LTD
- Filing Date
- 2022-11-04
- Publication Date
- 2026-06-09
AI Technical Summary
The temperature of the smoke in existing HNB cigarettes is too high, posing a risk of burning consumers' mouths, and conventional cooling components are either expensive or have limited cooling effect.
Design an HNB cigarette, including a tobacco heating section, a cooling component and a smoke guiding section arranged in sequence. The cooling component is composed of multiple cooling cavities symmetrical about the central axis. Air flow holes between each cooling cavity and adjacent cavities are alternately arranged in the edge and central regions. The smoke is repeatedly dispersed and converged in each cooling cavity, extending the flow path and achieving uniform cooling.
It effectively extends the flue gas flow path, achieves uniform flue gas temperature and sufficient cooling, reduces production costs, and improves the user experience.
Smart Images
Figure CN115500544B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of tobacco technology, and in particular to an HNB cigarette. Background Technology
[0002] HNB cigarettes are a new type of tobacco product. HNB stands for heated tobacco, meaning that the tobacco is heated to produce smoke without actually burning it. In recent years, HNB cigarettes have gradually become known to consumers and are increasingly popular.
[0003] Because HNB (High-End New) cigarettes do not directly burn the tobacco, the resulting smoke has a high moisture content, forming a high-temperature aerosol. When a consumer smokes an HNB cigarette, this relatively hot smoke enters the consumer's mouth, posing a risk of burns.
[0004] To prevent consumers from inhaling excessively hot smoke, cooling the smoke is essential; however, the cooling components commonly found in conventional HNB cigarettes are either too expensive or have limited cooling effects. Currently, how to achieve cooling of the smoke in HNB cigarettes is one of the key research issues in the industry. Summary of the Invention
[0005] The purpose of this invention is to provide an HNB cigarette that can, to a certain extent, ensure the cooling effect of the smoke in the HNB cigarette and improve the user experience of the HNB cigarette.
[0006] To solve the above-mentioned technical problems, the present invention provides an HNB cigarette, comprising a tobacco heating section, a cooling component, and a smoke guiding section arranged sequentially;
[0007] The cooling component includes a cylindrical structure and multiple cooling cavities arranged sequentially along the flue gas flow direction within the cylindrical structure.
[0008] Each of the cooling chambers is a symmetrical cavity about the central axis of the cylindrical structure; an airflow hole is provided between each cooling chamber and two adjacent cooling chambers so that the flue gas flow can flow sequentially in each cooling chamber;
[0009] Furthermore, the airflow hole between each cooling cavity and an adjacent cooling cavity is located in the edge region, and the airflow hole between each adjacent cooling cavity is located in the central region near the central axis.
[0010] In one optional embodiment of this application, each of the cooling cavities is a curved cavity that bends toward the direction of flue gas flow.
[0011] In one alternative embodiment of this application, each of the cooling cavities includes a hemispherical cavity or a semi-ellipsoidal cavity.
[0012] In one optional embodiment of this application, the cooling cavity is a metal cavity, and the cylindrical structure is a metal cylinder.
[0013] In one optional embodiment of this application, a first cooling filter rod is provided at the end where the flue gas guide section is connected to the cylindrical structure; non-crushable dry bead particles are provided at the center of the first cooling filter rod.
[0014] In an optional embodiment of this application, a confluence cavity is provided on the side of the cooling cavity near the flue gas guide section, and the outlet of the confluence cavity near the flue gas guide section is located on the central axis of the cylindrical structure.
[0015] In one alternative embodiment of this application, the cross-section of the manifold in the direction perpendicular to the central axis of the cylindrical structure gradually decreases along the flue gas flow direction.
[0016] In one optional embodiment of this application, the flue gas guide section includes a filter rod; the filter rod is provided with a flavoring bead.
[0017] In an optional embodiment of this application, a cellulose particle segment is further provided between the filter rod and the first cooling filter rod.
[0018] In an optional embodiment of this application, a second cooling filter rod is further provided between the tobacco heating section and the cylindrical structure.
[0019] The present invention provides an HNB cigarette, comprising a tobacco heating section, a cooling component, and a smoke guiding section arranged sequentially; wherein, the cooling component includes a cylindrical structure and multiple cooling cavities arranged sequentially within the cylindrical structure along the smoke flow direction; each cooling cavity is a symmetrical cavity symmetrical about the central axis of the cylindrical structure; an airflow hole is provided between each cooling cavity and two adjacent cooling cavities to allow the smoke flow to flow sequentially within each cooling cavity; and the airflow hole between each cooling cavity and an adjacent cooling cavity is located in the edge region, while the airflow hole between each cooling cavity and another adjacent cooling cavity is located in the central region near the central axis.
[0020] The cooling component of the HNB cigarette of this application includes multiple cooling cavities arranged sequentially. Each cooling cavity is a symmetrical cavity about a central axis, and the airflow hole on one side of each cooling cavity is located in the edge region while the other side is located near the center region of the central axis. This allows the smoke to flow through each cooling cavity sequentially, with the airflow in adjacent cooling cavities either converging towards the center of the cooling cavity or radiating and diverging towards the edge of the cooling cavity. This achieves repeated dispersion and convergence of the smoke, providing a repeatedly tortuous flow path for the smoke, extending the smoke flow path length, and ensuring the cooling effect of the smoke. On the other hand, the repeated dispersion and convergence of the smoke ensures that the smoke is fully and evenly mixed, guaranteeing the uniformity of the smoke cooling. Furthermore, the cooling component of the HNB cigarette of this application has a simple structure and low manufacturing cost, which helps to reduce the production cost of HNB cigarettes. Attached Figure Description
[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the structure of an HNB cigarette provided in an embodiment of this application;
[0023] Figure 2 This is a schematic diagram of the cooling component provided in an embodiment of this application;
[0024] Figure 3 This is a schematic diagram of the structure of a single cooling cavity provided in an embodiment of this application;
[0025] Figure 4 This is a schematic diagram of another cooling component provided in an embodiment of this application. Detailed Implementation
[0026] In HNB cigarettes, the length of the cooling zone is limited. To structurally improve the cooling effect of the smoke passing through this zone, spiral or serpentine channels are typically used to extend the fluid path, thereby lengthening the smoke flow path and improving the cooling effect. However, because all the smoke flows along the same path, this type of channel often results in higher smoke temperatures at the center of the channel's cross-section, leading to uneven temperature distribution and poor cooling performance.
[0027] Therefore, this application provides an HNB cigarette that can, to a certain extent, ensure the cooling effect of the smoke and the uniformity of the smoke temperature.
[0028] To enable those skilled in the art to better understand the present invention, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0029] like Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, Figure 1 This is a schematic diagram of the structure of an HNB cigarette provided in an embodiment of this application; Figure 2 This is a schematic diagram of the cooling component provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a single cooling cavity provided in an embodiment of this application; Figure 4 This is a schematic diagram of another cooling component provided in an embodiment of this application.
[0030] In the HNB cigarette of this application, the smoke generated by heating the tobacco in the tobacco heating section 10 can flow along the cooling component 20 to the smoke guiding section 30, which can also be regarded as the filter section where the consumer inhales the smoke. Therefore, in the HNB cigarette, the general direction of smoke flow is from the tobacco heating section 10 to the smoke guiding section 30. Figure 1 The arrow shown indicates the direction of flue gas flow. In subsequent embodiments, the flue gas flow direction refers to... Figure 1 The direction shown is from the tobacco heating section 10 to the flue gas guiding section 30, which will not be repeated in this application.
[0031] In one specific embodiment of this application, the HNB cigarette may specifically include:
[0032] The tobacco heating section 10, the cooling component 20, and the flue gas guiding section 30 are arranged sequentially.
[0033] The cooling component 20 includes a cylindrical structure 21 and a multi-layer cooling cavity 22 arranged sequentially along the flue gas flow direction inside the cylindrical structure 21.
[0034] Each cooling chamber 22 is a symmetrical cavity about the central axis of the cylindrical structure 21; an air passage 221 is provided between each cooling chamber 22 and two adjacent cooling chambers 22 so that the flue gas flow can flow sequentially in each cooling chamber 22.
[0035] Furthermore, the air passage 221 between each cooling chamber 22 and an adjacent cooling chamber 22 is located in the edge region, and the air passage 221 between another adjacent cooling chamber 22 is located in the central region near the central axis.
[0036] Reference Figure 1 In this embodiment, the HNB cigarette can be roughly divided into a tobacco heating section 10, a cooling component 20, and a smoke guiding section 30, with the three sections connected sequentially. Multiple layers of inner wrapping paper 50 are sequentially wrapped around the outer surfaces of the tobacco heating section 10, the cooling component 20, and the smoke guiding section 30 to form the overall structure of the HNB cigarette. When the smoke generated by heating the tobacco in the tobacco heating section 10 passes through the cooling component 20, it is cooled to a suitable temperature and then enters the smoke guiding section 30 for consumption by the consumer.
[0037] The cooling component 20 in this embodiment includes a cylindrical structure 21, which is similar to a shell forming a channel for the flow of smoke. In order to maximize the heat exchange between the smoke and the external environment when it flows through the cooling component 20, the cylindrical structure 21 can be a metal cylindrical structure. In addition, the diameter of the metal cylinder should be approximately the same as the diameter of the HNB cigarette.
[0038] Reference Figure 2 and Figure 3 The cylindrical structure 21 of the cooling component 20 further includes multiple layers of cooling chambers 22 arranged sequentially along the flue gas flow direction. Each cooling chamber 22 is an axisymmetric cavity structure about the central axis of the cylindrical structure 21. Airflow holes are provided between each cooling chamber 22 and adjacent cooling chambers 22 to allow the flue gas to flow sequentially within each cooling chamber 22. In other words, when the flue gas passes through each cooling chamber 22, it flows from one cooling chamber 22 to another and then sequentially through each cooling chamber 22.
[0039] Based on this, the air passage 221 between each cooling chamber 22 and an adjacent cooling chamber 22 is located in the edge region, and the air passage 221 between another adjacent cooling chamber 22 is located in the central region near the central axis.
[0040] Reference Figure 2 and Figure 3 , Figure 2 and Figure 3 In the embodiments shown, each cooling cavity 22 is a cavity with a hemispherical curved surface structure; and for ease of understanding, in Figures 2 to 4 In the embodiments shown, the flow direction of the flue gas is indicated by lines with arrows. Figure 3 The illustrated embodiment shows a schematic diagram of a cooling chamber 22. Figure 3In the illustrated embodiment, four airflow holes 221 are provided at the edge of the concave spherical surface of the cooling cavity 22, serving as flue gas inlets. Two airflow holes 221 are provided near the center of the convex spherical surface of the cooling cavity 22 as flue gas outlets. It is understood that... Figure 3 The cooling cavity 22 shown should have an airflow hole 221, which is the same as the flue gas inlet, on the edge region of the outer convex spherical surface of the cooling cavity 22 whose inner concave spherical surface is in contact with the outer concave spherical surface. Figure 3 The concave spherical surface of the cooling cavity 22 shown is the convex spherical surface of the adjacent cooling cavity 22 on its concave side; therefore, when Figure 3 After the flue gas flows into the cooling chamber 22 from the flue gas inlet, the flue gas can then converge and flow radially from the edge regions in all directions towards the central region of the cooling chamber 22, and flow out from the flue gas outlet into the next adjacent cooling chamber 22 on the convex spherical side of the cooling chamber 22. Obviously, Figure 3 The flue gas outlet of the cooling chamber 22 shown is the flue gas inlet of the next cooling chamber 22, located in the central region of the concave spherical surface of the next cooling chamber 22, while the flue gas outlet of the next cooling chamber 22 is located in the edge region of the convex spherical surface. Thus, the flue gas flow diverges outward from the central region to the edge region within the cooling chamber 22. Therefore, this application employs a centrally symmetrical cooling cavity 22, and alternately positions the flue gas inlet and outlet of adjacent cooling cavities 22 in the central and edge regions of the cooling cavity 22. This results in a tortuous flow of airflow in opposite directions between adjacent cooling cavities 22, and the flue gas flow in each cooling cavity 22 converges or diverges radially. This achieves repeated mixing and dispersion of the flue gas flow, thereby extending the flue gas flow path and ensuring thorough mixing of different parts of the flue gas, thus guaranteeing the uniformity of the flue gas temperature. Furthermore, the flue gas flow in each cooling cavity 22 is dispersed around the central axis of the cylindrical structure 21, preventing the flue gas flow from becoming too concentrated and significantly improving the cooling effect on the flue gas.
[0041] In addition, Figure 2 and Figure 3In the illustrated embodiments, each cooling cavity 22 is a hemispherical cavity, and the radius of each cooling cavity 22 increases progressively along the flue gas flow direction. In practical applications, semi-ellipsoidal cavities or partially spherical cavities smaller than hemispheres can also be considered. However, in principle, the central region of each cooling cavity 22 should be close to the central axis of the cylindrical structure 21, while the edge region should be far from the central axis. When the flue gas flows in each cooling cavity 22, it repeatedly flows back and forth between the central axis near the cylindrical structure 21 and the side wall near the cylindrical structure 21. This fully utilizes the better heat dissipation effect of the side wall of the cylindrical structure 21 and avoids the problem of poor heat dissipation caused by the flue gas being too concentrated in the central axis region of the cylindrical structure 21.
[0042] Based on the above embodiments, it is not necessary to use a spherical or ellipsoidal cavity structure. Other smoothly transitioned curved surface structures can also be used. In short, each cooling cavity 22 can be a hemispherical cavity, a semi-ellipsoidal cavity, or other curved surface cavities with varying curvature. This application does not impose specific restrictions on this.
[0043] Furthermore, the cooling cavity 22 is not necessarily a curved cooling cavity 22. (See reference...) Figure 4 , Figure 4 In the embodiment shown, each cooling cavity 22 is a disc structure. Figure 4 Only cross-sectional views of each cooling chamber 22 are shown in the figure. Figure 4 The cooling chambers 22 shown are arranged sequentially along the flue gas flow direction, and Figure 2 as well as Figure 3 Similar to the embodiment shown, the airflow hole 221 between each cooling chamber 22 and the adjacent cooling chamber 22 on one side is located in the central region, while the airflow hole 221 between the adjacent cooling chamber 22 on the other side is located in the edge region, so that the flue gas flow of each adjacent cooling chamber 22 flows in opposite directions in a dispersed manner. This will not be repeated in this embodiment.
[0044] Furthermore, regardless of whether each cooling chamber 22 is specifically the first cooling chamber 22 closest to the tobacco heating section 10, multiple airflow holes 221 can be provided on the surface of its side closest to the flue gas heating section 10 to allow the flue gas to flow more smoothly into the cooling chamber 22. To further enhance the turbulence effect on the flue gas flow within each cooling chamber 22, multiple turbulence holes 222 can also be provided on both sides of the cavity wall of each cooling chamber 22. Of course, to avoid the turbulence holes 222 severely affecting the overall flow direction of the flue gas within the cooling chamber 22, the diameter of each turbulence hole 222 can be smaller than that of the airflow holes 221 that serve as the flue gas inlet and outlet, and they can be scattered on the cavity wall of the cooling chamber 22.
[0045] Optionally, for the cooling cavity 22 to be a curved cavity, the convex surface of each cooling cavity 22 can be bent in the direction of flue gas flow. This is beneficial for the smooth flow of flue gas into the flue gas flow and also conforms to the characteristics of flue gas flow.
[0046] Furthermore, for the cooling cavity 22, regardless of the cavity structure, it can be made of metal or ceramic material, as long as the cavity wall of the cooling cavity 22 has good thermal conductivity to a certain extent.
[0047] In summary, this application provides a cooling component in an HNB cigarette comprising multiple sequentially arranged multi-layered cooling cavities. Each cooling cavity is symmetrical about its central axis, with airflow holes on one side of each cavity located at the edge and the other side near the center of the central axis. This allows the smoke to flow sequentially through each cooling cavity, resulting in one airflow converging towards the center of the cavity while the other radiates outwards towards the edge. This repeated dispersion and convergence of the smoke provides a winding flow path, extending the path length and ensuring effective cooling. Furthermore, the repeated dispersion and convergence ensure thorough and uniform mixing of the smoke, guaranteeing uniform cooling. The cooling component of this HNB cigarette has a simple structure and low manufacturing cost, thus reducing the production cost of HNB cigarettes.
[0048] Based on the above discussion, in another optional embodiment of this application, it may further include:
[0049] A first cooling filter rod 40 is provided at one end of the flue gas guide section 10 and the cylindrical structure 21; non-crushable dry bead particles 41 are provided at the center of the first cooling filter rod 40.
[0050] It should be noted that the hot smoke aerosol generated by the tobacco heating section 10 in HNB cigarettes often has a dry and not smooth feel upon inhalation. Therefore, in this embodiment, a first cooling filter rod 40 is further provided between the smoke guiding section 10 and the cylindrical structure 21, and a non-crushable dry bead 41 is placed inside the first cooling filter rod 40. Unlike conventional flavor-carrying capsules, the non-crushable dry bead 41 can achieve the function of enhancing the aroma and moisturizing the smoke, but it works by heating rather than crushing it, and the heating temperature should not be too high. When the non-crushable dry bead 41 is appropriately heated, it can achieve the function of enhancing aroma and moisturizing.
[0051] However, adding a separate component to heat the non-crushable dry bead 41 in the HNB cigarette increases the complexity of the HNB cigarette structure. Furthermore, since the heating temperature required for the non-crushable dry bead 41 is not high, this embodiment can utilize the heat of the smoke to heat the non-crushable dry bead 41. To prevent the cooled smoke from being insufficient to allow the non-crushable dry bead 41 to function, another optional embodiment of this application may further include:
[0052] A confluence chamber 23 is provided on the side of the cooling chamber 22 near the flue gas guide section 30. The outlet 231 of the confluence chamber 23 near the flue gas guide section 30 is located on the central axis of the cylindrical structure 21.
[0053] In this embodiment, a confluence chamber 23 is provided on the side of the cooling chamber 22 near the flue gas guide section 30. Thus, when the flue gas flows through each cooling chamber 22 in sequence, it can enter the confluence chamber 23. Furthermore, the outlet 231 of the confluence chamber 23 is located on the central axis of the cylindrical structure 21. This allows the flue gas in the confluence chamber 23 to flow out from the outlet 231 located on the central axis and flow towards the first cooling filter rod 40. Obviously, at this time, the flue gas can flow towards the central axis of the cylindrical structure 21 and towards the first cooling filter rod 40 in a relatively concentrated manner. Non-crushable dry bead particles 41 are provided on the central axis inside the first cooling filter rod 40. This allows the flue gas to flow through the non-crushable dry bead particles 41 in a relatively concentrated manner. Compared with the dispersed flue gas, the concentrated flue gas has a relatively higher heat, which can heat the non-crushable dry bead particles 41 to a certain extent. This allows the aroma released by the non-crushable dry bead particles 41 to blend with the flue gas, thereby increasing the aroma of the flue gas and reducing the dryness of the flue gas.
[0054] In addition, to ensure that the flue gas can be better collected through the manifold 23, in another optional embodiment of this application, it may further include:
[0055] The cross-section of the manifold 23 in the direction perpendicular to the central axis of the cylindrical structure 21 gradually decreases along the flue gas flow direction.
[0056] like Figure 1 As shown, the manifold 23 can be adopted as follows: Figure 1 The semi-ellipsoidal cavity wall shown facilitates the convergence of flue gas along the curved cavity wall of the manifold 23 to a certain extent. Of course, in practical applications, the manifold 23 can also be considered as a hemispherical cavity or a conical cavity, etc., without affecting the technical solution of this application.
[0057] In addition, Figure 1In the embodiment shown, there is a certain gap between the air outlet 231 of the manifold 23 and the first cooling filter rod 40. In practical applications, the air outlet 231 of the manifold 23 can also be directly fitted to the first cooling filter rod 40. This application does not impose any specific restrictions on this.
[0058] Furthermore, considering that consumers may have different preferences for the aroma of cigarette smoke, in order to meet users' personalized needs for the aroma of HNB cigarettes, in another optional embodiment of this application, it may further include:
[0059] The flue gas guide section 30 includes a filter rod 31; the filter rod 31 is provided with a bursting bead 311.
[0060] It should be noted that the filter rod 31 in this application is made of a flexible material similar to a sponge; in this embodiment, a burst bead 311 is provided on the filter rod 31. Unlike the aforementioned non-crushable dry bead particles 41, the burst bead 311 in this embodiment needs to be crushed to release its aromatic scent. Based on different user preferences for the aroma of the smoke, users who like aromatic scents can squeeze the filter rod 31 to cause the burst bead 311 to burst, thus allowing the smoke to carry the aromatic scent. Users who do not like aromatic scents can choose not to crush the burst bead 311 and thus inhale smoke without aroma.
[0061] Furthermore, to further enhance the health benefits of HNB cigarette use, in another optional embodiment of this application, it may further include:
[0062] Cellulose particle segments 32 are disposed between filter rod 31 and first cooling filter rod 40.
[0063] The cellulose particle segment 32 is made from pure natural plant materials. It can significantly adsorb harmful substances in mainstream flue gas, reduce the content of harmful substances in flue gas, and thus reduce the damage of flue gas to consumers' health.
[0064] Furthermore, in another optional embodiment of this application, a second cooling filter rod 11 may be further provided between the tobacco heating section 10 and the cylindrical structure 21 in the HNB cigarette.
[0065] It should be noted that in this embodiment, both the second cooling filter rod 11 and the first cooling filter rod 40 can be filter rods made of the same material as the filter rod 31, and both use high-permeability filament bundles, which can greatly reduce the smoke suction resistance.
[0066] A thin tobacco shred is provided at one end of the tobacco heating section 10 near the cooling component 20. In practical applications, the side of the thin tobacco shred near the cooling component 20 is prone to sticking, collapsing, or even blocking the flow of smoke. Therefore, in this embodiment, a second cooling filter rod 11 is further provided, which can effectively avoid the problem of tobacco shred sticking and collapsing. Moreover, the second cooling filter rod 11 and the first cooling filter rod 40 provide dual filtration, which can further improve the filtration and cooling effect of smoke, thereby improving the smoking experience.
[0067] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that the elements inherent in a process, method, article, or apparatus that includes a list of elements are included. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Additionally, portions of the technical solutions provided in the embodiments of this application that are consistent with the implementation principles of corresponding technical solutions in the prior art have not been described in detail to avoid excessive elaboration.
[0068] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.
Claims
1. An HNB cigarette, characterized in that, It includes a tobacco heating section, a cooling component, and a flue gas guiding section arranged sequentially; The cooling component includes a cylindrical structure and multiple cooling cavities arranged sequentially along the flue gas flow direction within the cylindrical structure. Each of the cooling chambers is a symmetrical cavity about the central axis of the cylindrical structure; an airflow hole is provided between each cooling chamber and two adjacent cooling chambers so that the flue gas flow can flow sequentially in each cooling chamber; Furthermore, the airflow hole between each cooling cavity and an adjacent cooling cavity is located in the edge region, and the airflow hole between each cooling cavity and another adjacent cooling cavity is located in the central region near the central axis; multiple disturbance holes are provided on both sides of the cooling cavity, and the diameter of each disturbance hole is smaller than the diameter of the airflow hole. Each of the cooling cavities is a curved cavity that bends in the direction of flue gas flow; Each of the cooling cavities includes a hemispherical cavity or a semi-ellipsoidal cavity; the radius of each cooling cavity increases progressively along the flue gas flow direction; the concave spherical surface of the cooling cavity is the convex spherical surface of the adjacent cooling cavity on the concave side.
2. The HNB cigarette as described in claim 1, characterized in that, The cooling cavity is a metal cavity, and the cylindrical structure is a metal cylinder.
3. The HNB cigarette as described in claim 1 or 2, characterized in that, A first cooling filter rod is provided at one end of the flue gas guide section and the cylindrical structure; non-crushable dry bead particles are provided at the center of the first cooling filter rod.
4. The HNB cigarette as described in claim 3, characterized in that, It also includes a confluence chamber located on the side of the cooling chamber near the flue gas guide section, and the outlet of the confluence chamber near the flue gas guide section is located on the central axis of the cylindrical structure.
5. The HNB cigarette as described in claim 4, characterized in that, The cross-section of the manifold, perpendicular to the central axis of the cylindrical structure, gradually decreases along the direction of flue gas flow.
6. The HNB cigarette as described in claim 3, characterized in that, The flue gas guide section includes a filter rod; the filter rod is provided with a bursting bead.
7. The HNB cigarette as described in claim 6, characterized in that, Cellulose particle segments are also provided between the filter rod and the first cooling filter rod.
8. The HNB cigarette as described in claim 6, characterized in that, A second cooling filter rod is also provided between the tobacco heating section and the cylindrical structure.