A concentric circle composite structure heating cigarette
By introducing concentric ring structures into heated cigarettes, the problems of charring residue and low draw resistance in the heating element are solved, achieving full filtration and mixing of smoke, improving the smoking experience and taste, and extending the service life of the heating element.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA TOBACCO SHANDONG IND
- Filing Date
- 2025-06-13
- Publication Date
- 2026-06-19
AI Technical Summary
In existing heated cigarettes, the heating element comes into direct contact with the tobacco material, resulting in charring residue. The hollow structure leads to low draw resistance, fast draw rate, insufficient heating, poor filtration, and incomplete mixing of smoke, all of which affect the smoking experience.
The cigarette is heated using a concentric ring composite structure. By setting concentric ring structural components in the cigarette, the central suction resistance is increased. The filter material of the concentric ring structural components is used to filter the smoke, optimize the smoke flow path, and ensure stable alignment between the heating element and the smoke-generating carrier.
It improves the efficiency of flue gas filtration, enhances the uniformity of flue gas mixing, improves the smoking experience and taste, and extends the service life of the heating element.
Smart Images
Figure CN224369062U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of heated cigarette technology, specifically relating to a concentric circle composite structure heated cigarette. Background Technology
[0002] The statements herein provide only background information related to this invention and do not necessarily constitute prior art.
[0003] Heated cigarettes typically consist of a smoke-generating carrier and a filter section. The smoke-generating carrier is placed in a heating device and heated, releasing smoke that is then filtered by the filter section before being inhaled. However, certain problems exist. For example, when the heating element of the heating device is inserted into the smoke-generating carrier and directly contacts the tobacco material, the smoke-generating agent can easily char and adhere to the heating element. Long-term accumulation of residue can cause the heating element to fail to reach the required heating temperature, affecting smoke production and reducing its lifespan. Existing technology avoids direct contact between the heating element and the tobacco material by incorporating a hollow tobacco section within the cigarette structure, allowing the heating element of the heating device to be placed inside the hollow section for heating.
[0004] However, this results in a situation where, due to the hollow center of the hollow tobacco segment, the suction resistance in the middle of the smoke-generating carrier decreases. When the smoker inhales, most of the smoke is drawn out through the area with low suction resistance in the middle, reaches the filter, and then enters the smoker's mouth. The low suction resistance increases the inhalation rate, further accelerating the flow rate of the smoke. This leads to insufficient heating of the smoke-generating carrier as a whole, resulting in poor heating and smoke generation and reduced smoke. The smoke enters the smoker's mouth without being fully mixed and filtered, affecting the smoking experience and reducing the taste of the smoke. Furthermore, when inserting the hollow tobacco segment into the smoking device, the heating element of the device is prone to being inserted crookedly, affecting heating and smoke generation.
[0005] Furthermore, because the smoke is concentrated in the middle for filtration, the filter tip may experience yellowing and excessive buildup of deposits during multiple filtrations in the middle, leading to a decrease in filtration efficiency. Meanwhile, the outer ring of the filter tip does not participate in smoke filtration, failing to fully utilize the filter tip. Large particles of harmful substances in the smoke are not adequately filtered, resulting in poor smoke filtration. Utility Model Content
[0006] The purpose of this invention is to provide a concentric ring composite structure heated cigarette. By setting a multi-segment cigarette structure and adding concentric ring structural components to the cigarette structure to increase the central suction resistance, the smoke and aerosol particles generated by the smoke-generating carrier under the action of the heat source (heating body) are filtered and released through the outer ring cavity filter material of the concentric ring structural components. This improves the interception of large aerosol particles in the smoke, while allowing the smoke to be fully mixed, resulting in a finer and smoother smoke. At the same time, the filter end can be fully utilized, and during inhalation, the heat transfer rate between the heat source and the smoke-generating carrier is accelerated.
[0007] To achieve the above objectives, this utility model is implemented through the following technical solution:
[0008] In a first aspect, embodiments of this utility model provide a concentric circle composite structure heated cigarette, including a smoke-generating carrier, the smoke-generating carrier being configured as a hollow smoke segment, one end of the hollow smoke segment being provided with a concentric circle ring structure, the other end of the hollow smoke segment being provided with a guide member, and the middle of the guide member being provided with an insertion cavity along the axial direction;
[0009] The concentric ring structure has a concentric circular rod in the middle along the axial direction. The concentric circular rod has a first covering layer on the outside. The outer side of the first covering layer is covered with a filter material in a ring shape. The filter material is covered with a second covering layer on the outside.
[0010] As a further technical solution, the hollow smoke section has a cylindrical heating cavity along the axial direction in the middle.
[0011] As a further technical solution, the ratio of the radial cross-sectional area of the heating cavity to the cross-sectional area of the concentric circular rod is between 0.4 and 0.85.
[0012] As a further technical solution, the heating chamber is provided with a central hollow tube inside.
[0013] As a further technical solution, the air permeability of the filter material is greater than that of the first coating layer; the air permeability of the filter material is greater than that of the second coating layer.
[0014] As a further technical solution, the filter material is made of cellulose acetate, acrylonitrile fiber, or polypropylene fiber.
[0015] As a further technical solution, the radial diameter of the insertion cavity is greater than or equal to the radial diameter of the heating cavity.
[0016] As a further technical solution, the insertion cavity of the guide member is provided with annular heat insulation material.
[0017] As a further technical solution, the radial diameter of the concentric ring structure is the same as the radial diameter of the hollow smoke section; the radial diameter of the hollow smoke section is the same as the radial diameter of the guide member.
[0018] As a further technical solution, the hollow smoke section and the concentric ring structure are covered with molded paper.
[0019] The beneficial effects of the above-described embodiments of this utility model are as follows:
[0020] This utility model provides a concentric circle composite structure heated cigarette. By setting a multi-segment cigarette structure and adding a concentric circle ring structure to the cigarette structure to increase the central suction resistance of the cigarette, the smoke and aerosol particles generated by the smoke-generating carrier under the action of the heat source (heating body) are filtered and released through the outer circle of the concentric circle ring structure. This improves the interception of large aerosol particles in the smoke, while allowing the smoke to be fully mixed, resulting in a finer and smoother smoke. At the same time, the filter end can be fully utilized. The insertion cavity design of the guide component facilitates the precise insertion of the heating device, ensuring the alignment stability of the heating body and the hollow cigarette segment, and avoiding local overheating or uneven heat transfer due to misalignment.
[0021] Meanwhile, during inhalation, the concentric rods in the concentric ring structure intercept the smoke generated in the heating chamber, increasing the suction resistance at the center of the smoke-generating carrier. This causes most of the smoke to pass through the annular tobacco material outside the heating chamber and enter the filter material of the concentric ring structure, altering the smoke's flow path, reducing the inhalation rate, and further improving the heat transfer rate between the heating element and the smoke-generating carrier. This avoids the problem of low heat exchange efficiency between the smoke-generating carrier and the heating element due to most of the smoke flowing out of the heating chamber, ensuring that the smoke-generating carrier can be fully heated, guaranteeing the heating and smoke generation effect, and improving the inhalation experience and smoke taste. Attached Figure Description
[0022] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.
[0023] Figure 1 This is a front sectional view of the overall structure of a concentric circle composite structure heated cigarette provided in Embodiment 1 of this utility model;
[0024] Figure 2 This is a front sectional view of the concentric ring structure provided in Embodiment 1 of this utility model;
[0025] Figure 3 This is a side sectional view of the concentric ring structure provided in Embodiment 1 of this utility model.
[0026] The diagram is for illustrative purposes only.
[0027] Among them, 1. concentric ring structure; 2. filter material; 3. concentric rod; 4. hollow smoke section; 5. central hollow tube; 6. heating chamber; 7. guide component; 8. insertion chamber. Detailed Implementation
[0028] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.
[0029] Example 1
[0030] In a typical embodiment of this utility model, such as Figures 1 to 3 As shown, a concentric circle composite structure heated cigarette is provided, including a smoke-generating carrier, which is configured as a hollow smoke section 4. One end of the hollow smoke section 4 is provided with a concentric circle ring structure 1, and the other end of the hollow smoke section 4 is provided with a guide 7. The middle part of the guide 7 is provided with an insertion cavity 8 along the axial direction.
[0031] The concentric ring structure 1 has a concentric rod 3 arranged axially in the middle part, and a first covering layer is provided on the outside of the concentric rod 3. The filter material 2 is circumferentially covered on the outside of the first covering layer, and a second covering layer is provided on the outside of the filter material 2.
[0032] This design optimizes the draw resistance of the cigarette. The concentric ring structure 1, through its multi-layered design (concentric rod 3 + filter material 2 + covering layer), significantly increases the draw resistance in the central area of the cigarette, avoiding the problem of low draw resistance caused by the hollow structure in the prior art, and further improving the smoke filtration efficiency. The filter material 2 is annularly wrapped around the outside of the concentric rod 3, forcing the smoke to diffuse along the annular path when passing through, increasing the contact area and time with the filter material 2, thereby effectively trapping large aerosol particles. In addition, the insertion cavity 8 of the guide 7 is designed to facilitate the precise insertion of the heating device, ensuring the alignment stability of the heating element and the hollow smoke section 4, and avoiding local overheating or uneven heat transfer due to misalignment.
[0033] Furthermore, the hollow tobacco section 4 has a cylindrical heating cavity 6 along the axial direction in its middle part. This arrangement ensures the fit between the heating element and the cavity wall, preventing heat loss, while maintaining the overall mechanical strength of the cigarette.
[0034] Furthermore, the ratio of the radial cross-sectional area of the heating cavity 6 to the cross-sectional area of the concentric rod 3 is between 0.4 and 0.85.
[0035] This configuration, through the ratio control of the radial cross-sectional area of the heating cavity 6 and the cross-sectional area of the concentric rod 3, ensures a reasonable space allocation between the heating cavity 6 and the concentric rod 3. It satisfies the insertion requirements of the heating element while avoiding a decrease in heat transfer efficiency due to the excessively large cavity causing the smoke carrier material to be too thin. It also optimizes the airflow path, balancing the flue gas velocity and suction resistance within this ratio range, allowing the flue gas to form a laminar flow between the heating cavity 6 and the concentric circular structure, thus improving the uniformity of flue gas mixing.
[0036] Furthermore, the heating chamber 6 is equipped with a central hollow tube 5. This configuration provides the heating chamber 6 with an independent space for the heating element, allowing heat to be evenly transferred to the smoke-generating carrier through the chamber wall, reducing the problem of charring residue caused by direct contact. The central hollow tube 5 can serve as an auxiliary heat transfer channel, promoting axial heat diffusion and reducing charring caused by localized high temperatures. Additionally, the presence of the central hollow tube 5 can adjust the airflow path inside the heating chamber 6, compensating for potential flue gas backflow problems caused by increased suction resistance from the concentric rods 3.
[0037] Furthermore, the air permeability of the filter material 2 is greater than that of the first coating layer; the air permeability of the filter material 2 is greater than that of the second coating layer.
[0038] With this setup, the difference in air permeability creates a "tight-loose-tight" gradient structure, forcing the flue gas to be intercepted and filtered through the highly permeable filter material 2. At the same time, the highly permeable filter material 2 can reduce local airflow resistance, prevent the flue gas from being overly concentrated in a certain path, and ensure that the filter material 2 is utilized throughout the entire area.
[0039] Furthermore, the filter material 2 is made of cellulose acetate, acrylonitrile fiber, or polypropylene fiber. This configuration allows materials such as cellulose acetate to have a high specific surface area and lipophilicity, effectively adsorbing tar and particulate matter in the flue gas.
[0040] Furthermore, the radial diameter of the insertion cavity 8 is greater than or equal to the radial diameter of the heating cavity 6. This design ensures that the heating element of the heating appliance can smoothly enter the heating cavity 6, avoiding insertion resistance or poor sealing due to size mismatch.
[0041] Furthermore, the insertion cavity 8 of the guide member 7 is provided with an annular heat-insulating material. The heat-insulating material can block the heat conduction from the heating element to the outside of the cigarette, improve the heat energy utilization rate, and at the same time protect the guide member 7 from deformation due to the heating of the heating element.
[0042] Furthermore, the radial diameter of the concentric ring structure 1 is the same as the radial diameter of the hollow smoke section 4; the radial diameter of the hollow smoke section 4 is the same as the radial diameter of the guide 7. This configuration ensures seamless connection between the structures by maintaining consistent diameters, avoiding airflow turbulence or mechanical stress concentration caused by abrupt changes in size, and simplifies the manufacturing process by unifying dimensions, reducing the risk of processing errors.
[0043] Furthermore, the hollow tobacco segment 4 and the concentric ring structure 1 are covered with forming paper. This arrangement provides mechanical support, preventing the cigarette from deforming during smoking or heating. The forming paper also blocks external moisture or contaminants, extending the cigarette's shelf life.
[0044] Example 2
[0045] Based on Example 1, any one of the following structures can be added to the cigarette structure with concentric ring structure 1: cigarette filter rod, hollow filter rod, porous filter rod, Collins filter rod, gear filter rod, and spiral cooling component, to form a quaternary composite multi-segment cigarette structure, further improving the smoking experience of heated cigarettes.
[0046] The filter rod can be made of cellulose acetate material into a solid cylindrical structure with a diameter that is consistent with the diameter of the concentric ring structure 1. The flue gas enters the filter rod through the concentric ring structure 1, further enhancing the filtration effect of the flue gas.
[0047] The hollow filter rod is configured as a hollow tubular structure with the same diameter as the concentric ring structure 1, arranged along the axial direction. Several vent holes are provided on the tube wall, so that external air can enter the inner cavity of the hollow filter rod through the vent holes during the suction process, thereby further cooling the flue gas.
[0048] The porous filter rod is configured with multiple flue gas channels arranged along the axial direction. The diameter of the multiple flue gas channels is smaller than the diameter of the heating chamber 6. After the flue gas passes through the concentric ring structure 1, it enters the porous filter rod, realizing the diversion and acceleration of the flue gas. The flue gas achieves collision filtration at the contact end of the two structures. After entering the multiple flue gas channels, the flue gas is mixed due to the smaller diameter of the flue gas channels, further improving the mixing effect of the flue gas and the smoking taste.
[0049] The Collins filter rod is designed with a flue gas flow channel in the middle along the axial direction and multiple flue gas through holes on the circumferential side. The diameter of the flue gas flow channel is smaller than the diameter of the heating chamber 6, which realizes the step rheological transformation of the flue gas and improves the filtration effect.
[0050] The gear filter rod is a cylindrical structure with multiple toothed channels on the ring side. After the flue gas passes through the concentric ring structure 1, it enters the gear filter rod. The two structures collide and filter at the contact point, and the flue gas flows to the toothed channels on the ring side, contacting the outside air to cool the flue gas.
[0051] The spiral cooling component has baffles at both ends, with vent holes on the baffles. A spiral structure is set between the two baffles to turbulent the flue gas and increase the flow path of the flue gas to achieve cooling.
[0052] In the production process, the four-element composite multi-segment cigarette structure in this embodiment can be produced separately and then assembled. For example, the filter rod, concentric ring structure 1, hollow cigarette segment 4 and guide 7 can be formed into a binary composite filter rod on the filter rod composite equipment. Then, the two binary composite filter rods can be joined together by a twisting machine to produce a heated cigarette of this structure type, i.e., production in a 2+2 mode.
[0053] Alternatively, any three of the above-mentioned cigarette filter rods, hollow filter rods, porous filter rods, Collins filter rods, gear filter rods, and spiral structural components can be combined into a ternary composite filter rod, which is then twisted together with a single-structure filter rod to form a 1+3 or 3+1 production model.
[0054] Example 3
[0055] Based on Example 1, any two of the following structures can be added to the cigarette structure with concentric ring structure 1: cigarette filter rod, hollow filter rod, porous filter rod, Collins filter rod, gear filter rod, and spiral structure to form a five-element composite multi-segment cigarette structure, further improving the smoking experience of heated cigarettes.
[0056] In the production process, the five-element composite multi-segment cigarette structure in this embodiment can be produced separately and then assembled. For example, the hollow filter rod, the concentric ring structure 1, the hollow cigarette segment 4, and the guide 7 can be formed into binary composite filter rods on the filter rod composite equipment. Then, the two binary composite filter rods are joined together by a twisting machine to produce a heated cigarette of this structure type. Finally, a filter rod is set at the mouthpiece end, which is the 1+2+2 production mode.
[0057] Alternatively, any two of the above-mentioned cigarette filter rods, hollow filter rods, porous filter rods, Collins filter rods, gear filter rods, and spiral structural components can be combined to form a binary composite filter rod, any three can be combined to form a ternary composite filter rod, and any four can be combined to form a quaternary composite filter rod, and can be produced using 3+2 mode, 2+3 mode, 1+4 mode, 4+1 mode, etc., with 3+2 mode or 1+4 mode being preferred.
[0058] This utility model provides a concentric circle composite structure heated cigarette. By setting a multi-segment cigarette structure and adding a concentric circle ring structure to the cigarette structure to increase the central suction resistance of the cigarette, the smoke and aerosol particles generated by the smoke-generating carrier under the action of the heat source (heating body) are filtered and released through the outer circle of the concentric circle ring structure. This improves the interception of large aerosol particles in the smoke, while allowing the smoke to be fully mixed, resulting in a finer and smoother smoke, and the filter end can be fully utilized.
[0059] Meanwhile, during inhalation, the concentric rods in the concentric ring structure intercept the smoke generated in the heating chamber, increasing the suction resistance at the center of the smoke-generating carrier. This causes most of the smoke to pass through the annular tobacco material outside the heating chamber and enter the filter material of the concentric ring structure, altering the smoke's flow path, reducing the inhalation rate, and further improving the heat transfer rate between the heating element and the smoke-generating carrier. This avoids the problem of low heat exchange efficiency between the smoke-generating carrier and the heating element due to most of the smoke flowing out of the heating chamber, ensuring that the smoke-generating carrier can be fully heated, guaranteeing the heating and smoke generation effect, and improving the inhalation experience and smoke taste.
[0060] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A concentric composite structure heated cigarette, characterized by, It includes a smoke-generating carrier, which is configured as a hollow smoke section. One end of the hollow smoke section is provided with a concentric ring structure, and the other end of the hollow smoke section is provided with a guide. The middle part of the guide is provided with an insertion cavity along the axial direction. The concentric ring structure has a concentric circular rod in the middle along the axial direction. The concentric circular rod has a first covering layer on the outside. The outer side of the first covering layer is covered with a filter material in a ring shape. The filter material is covered with a second covering layer on the outside.
2. A concentric composite heating cigarette according to claim 1, wherein, The hollow smoke section has a cylindrical heating cavity along the axial direction in the middle.
3. The concentric circle composite structure heated cigarette as described in claim 2, characterized in that, The ratio of the radial cross-sectional area of the heating cavity to the cross-sectional area of the concentric circular rod is between 0.4 and 0.
85.
4. The concentric circle composite structure heated cigarette as described in claim 2, characterized in that, The heating chamber has a central hollow tube inside.
5. The concentric composite heating cigarette of claim 1, wherein, The air permeability of the filter material is greater than that of the first coating layer; the air permeability of the filter material is greater than that of the second coating layer.
6. The concentric composite heating cigarette of claim 1, wherein, The filter material is made of cellulose acetate, acrylonitrile, or polypropylene.
7. The concentric composite heating cigarette of claim 1, wherein, The radial diameter of the insertion cavity is greater than or equal to the radial diameter of the heating cavity.
8. The concentric composite heating cigarette of claim 1, wherein, The guide member has an annular heat-insulating material in its insertion cavity.
9. A concentric circle composite structure heated cigarette as described in claim 1, characterized in that, The radial diameter of the concentric ring structure is the same as the radial diameter of the hollow smoke section; the radial diameter of the hollow smoke section is the same as the radial diameter of the guide component.
10. The concentric composite heating cigarette of claim 1, wherein, The hollow smoke section and the concentric ring structure are covered with molded paper.