Cigarette end sealing cylinder, heating cigarette smoking set and heating cigarette system
By designing a sealing cylinder at the end of the heated cigarette stick and gradually reducing the cross-section using bottom and middle annular sealing elements, the problem of insufficient aerosol generation in heated cigarettes is solved, achieving more efficient aerosol generation and stability, and avoiding air leakage and cigarette paper wrinkles.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ZHENGZHOU TOBACCO RES INST OF CNTC
- Filing Date
- 2024-11-11
- Publication Date
- 2026-05-12
AI Technical Summary
In existing heated cigarettes, aerosol generation is insufficient, the effective conversion rate of the aerosol generation matrix is low, and the heating waiting time is long.
A cigarette end sealing cylinder is designed with bottom and middle annular sealing elements on the inner wall, gradually reducing the cross-sectional area to seal the gap between the heated cigarette smoking section and the cigarette end sealing cylinder, preventing outside air from entering and improving the heat conduction rate and aerosol concentration.
It improves the efficiency and stability of aerosol generation, avoids cigarette paper wrinkles and air leakage, enhances the appearance of cigarettes, and shortens the heating time.
Smart Images
Figure CN122004538A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of heated cigarette technology, specifically relating to a cigarette end sealing cylinder, a heated cigarette device, and a heated cigarette system. Background Technology
[0002] Traditional cigarettes, e-cigarettes, heated cigarettes, oral cigarettes, nicotine pouches, and other tobacco products all primarily rely on nicotine delivery as their main consumption characteristic. However, newer tobacco products such as e-cigarettes, heated cigarettes, and nicotine pouches, which offer lower harm to consumers while effectively delivering nicotine, are increasingly favored by consumers and have shown rapid growth in the international tobacco market in recent years, becoming a key focus for major tobacco manufacturers. Heated cigarettes, in particular, have experienced rapid development in the international market due to their similarity to the smoke characteristics of traditional cigarettes, and are expected to become a major tobacco consumer product. Innovations in heated cigarettes mainly focus on the cigarette's structure, heating methods, and the close integration with smoking devices to promote aerosol generation in tobacco products and their efficient delivery to consumers.
[0003] Existing technology discloses a sealed heated cigarette (Chinese patents filed earlier by the applicant in this case: 202010241676.5, 201911021676.8, 201911021823, etc.). This cigarette generally consists of an aerosol generating matrix section, a hollow structure smoke mixing section, and a filter section. Specifically, it seals the upstream end face of the aerosol generating matrix. The sealing method can be achieved by sealing the upstream end face of the aerosol generating matrix with a matching smoking device, or by attaching a sealing rod or gas barrier membrane to the upstream end face of the aerosol generating matrix. Simultaneously, an airflow channel is provided in the smoke mixing section (for example, controllable-size channels are provided in the hollow structure sidewall of the smoke mixing section). During inhalation, the airflow bypasses the aerosol-generating matrix. Air enters the hollow structure cavity of the smoke-gas mixing section through sidewall channels. The fluid flow in the mixing section creates negative pressure, drawing out the heated aerosol due to the pressure difference. This aerosol mixes with air entering from the outside through the sidewall channels and is then passed through the filter section. Since the main airflow (its weight ratio is between 92% and 98%) is air entering from the outside through the sidewall channels, this heated cigarette does not require further cooling of the mixed aerosol. However, problems remain, including insufficient aerosol generation, low effective material conversion rate of the aerosol-generating matrix, and a long heating waiting time.
[0004] This application is made in order to further improve the efficiency of aerosol generation and transfer. Summary of the Invention
[0005] The first aspect of this application provides a cigarette end sealing cylinder, which is a hollow cylindrical structure with a bottom seal, and its inner wall is provided with: a bottom annular sealing element located at the bottom of the cigarette end sealing cylinder, and / or a middle annular sealing element located in the middle of the cigarette end sealing cylinder;
[0006] The bottom annular sealing element and / or the middle annular sealing element are used to seal the gap between the heated cigarette's smoke-generating section and the cigarette end sealing cylinder;
[0007] From the top to the bottom of the cigarette end sealing cylinder, the cross-sectional area of the hollow portion of the bottom annular cigarette seal or the middle annular cigarette seal gradually decreases.
[0008] Preferably, the cross-sectional perimeter of the hollow portion of the bottom annular cigarette seal or the middle annular cigarette seal remains constant or decreases by no more than 5%.
[0009] Preferably, from the top to the bottom of the cigarette end sealing cylinder, the cross-section of the hollow portion of the bottom annular cigarette seal or the middle annular cigarette seal changes from an initial circle to a rectangle, an ellipse, or a racetrack shape.
[0010] Preferably, the number of the central annular cigarette seal is one or more;
[0011] Multiple central annular cigarette seals are arranged at axial intervals along the end sealing cylinder of the cigarette stick.
[0012] Preferably, the ratio of the area of the circle to the area of the inner cavity of the cigarette end sealing tube is 85% to 98%.
[0013] Preferably, the height of the bottom annular sealing element is 0.1 to 0.8 times the height of the cigarette end sealing cylinder;
[0014] The ratio of the distance A between the top surface of the topmost annular sealing element and the bottom of the cigarette end sealing cylinder to the height B of the cigarette end sealing cylinder is 0.2 to 0.8, that is, A / B is 0.2 to 0.8.
[0015] Preferably, the top surface of the bottom annular cigarette seal and the top surface of the cigarette end sealing cylinder are connected by a ramp to facilitate cigarette insertion;
[0016] Preferably, the top surface of the central annular cigarette seal at the topmost point is connected to the top surface of the cigarette end sealing cylinder by a ramp to facilitate cigarette insertion.
[0017] Preferably, the inner wall of the bottom annular sealing element is sloped to facilitate cigarette insertion.
[0018] A second aspect of this application provides a heated cigarette device, the heated cigarette device comprising: a cigarette end sealing cylinder as described in any of the first aspects, and a heat source located circumferentially around the cigarette end sealing cylinder.
[0019] Preferably, the heat source is located on the end sealing cylinder of the cigarette stick, or outside the end sealing cylinder of the cigarette stick.
[0020] A third aspect of this application provides a heated cigarette system, the heated cigarette system comprising the bottom-sealed heated cigarette device and heated cigarette as described in the second aspect;
[0021] The cross-sectional perimeter of the hollow portion of the bottom annular cigarette seal or the middle annular cigarette seal remains constant, and this perimeter is equal to the cross-sectional perimeter of the heated cigarette smoke-generating section; or, from the top to the bottom of the cigarette end sealing cylinder, the cross-sectional perimeter of the hollow portion of the bottom annular cigarette seal or the middle annular cigarette seal decreases by no more than 5%, and the cross-sectional perimeter of the hollow portion of the topmost bottom annular cigarette seal or the middle annular cigarette seal is equal to the cross-sectional perimeter of the heated cigarette smoke-generating section.
[0022] Preferably, the heated cigarette comprises: a smoke-generating section, a smoke-mixing section, and a filter section; the smoke-mixing section is a hollow cylinder, and the sidewall of the smoke-mixing section has through holes.
[0023] The central annular sealing element is located axially between the bottom of the cigarette end sealing cylinder and the through hole on the side wall of the smoke mixing section of the heated cigarette.
[0024] If the cross-section of the seal is circular along the entire axial direction, the annular seal directly reduces the inner diameter of the cylindrical smoke-generating section, thus significantly reducing the circumference of the smoke-generating section. Therefore, the following disadvantages exist: 1. The cigarette paper will have wrinkles, which can easily lead to air leakage during sealing; 2. The end of the cigarette will deform severely, easily causing complete opacity, and the light transmittance is difficult to control; 3. Wrinkles on the cigarette affect its aesthetic appeal.
[0025] If, from downstream to upstream, the cross-sectional area of the hollow portion of the bottom annular cigarette seal or the middle annular cigarette seal gradually decreases while its perimeter is equal to or less than 5% of the perimeter of the heated cigarette smoke-generating section, then the cigarette paper perimeter will not be significantly altered during the compression process of the seal, thus preventing noticeable wrinkles and air leakage.
[0026] Furthermore, since a circle has the largest area for the same perimeter, changing the cross-section of the hollow part from a circle to a rectangle, ellipse, or racetrack shape with the same perimeter will reduce the cross-sectional area and increase the compaction of the tobacco.
[0027] Preferably, the height of the bottom annular cigarette sealing element is less than the length of the aerosol matrix section. More preferably, the height of the bottom annular cigarette sealing element should be greater than 0.5 times the length of the aerosol matrix section. Even more preferably, the height of the bottom annular cigarette sealing element is between 0.5 and 0.8 times the length of the aerosol matrix section.
[0028] Preferably, the distance between the central annular cigarette sealing element and the bottom of the cigarette receiving cavity is less than the length of the aerosol matrix section. More preferably, the distance between the central annular cigarette sealing element and the bottom of the cigarette receiving cavity should be greater than 0.2 times the length of the aerosol matrix section. Even more preferably, the distance between the central annular cigarette sealing element and the bottom of the cigarette receiving cavity is 0.2 to 0.8 times the length of the aerosol matrix section.
[0029] Compared with the prior art, the present invention has the following beneficial effects:
[0030] 1. This application provides a cigarette end sealing cylinder. Without changing the cigarette manufacturing process, using the cigarette end sealing cylinder to seal the upstream end face of the smoke-generating section prevents outside air from entering the smoke-generating section during inhalation. Because the newly generated aerosol substances have a displacement effect on the internal atmosphere, the oxygen content in the smoke-generating section gradually decreases. This allows for increased heating temperature without concern about combustion in the smoke-generating section.
[0031] Meanwhile, the sealing cylinder at the end of the cigarette can alter the shape of the smoke-generating section, increasing the tobacco density and thus improving the heat transfer rate and heating speed of the section, thereby enhancing aerosol concentration and puff-by-puff stability. Furthermore, the porosity of the downstream undeformed portion of the smoke-generating section remains unchanged, preserving the diffusion of generated aerosols downstream of the section.
[0032] 2. When using the cigarette end sealing cylinder, the circumference of the cigarette-generating section should not be changed during the compression process of the cigarette-generating section, or the circumference should be reduced slightly to avoid the cigarette paper wrinkles affecting the sealing effect. Attached Figure Description
[0033] Figure 1 This is a side view of the cigarette end sealing cylinder in the X direction according to the first embodiment.
[0034] Figure 2 This is a Y-direction side view of the cigarette end sealing cylinder of the first embodiment.
[0035] Figure 3 This is a perspective view of the cigarette end sealing cylinder according to the first embodiment.
[0036] Figure 4 A schematic diagram of an aerosol generating device equipped with a first type of cigarette end sealing cylinder and circumferential heating.
[0037] Figure 5This is a side view of the cigarette end sealing cylinder in the X direction according to the second embodiment.
[0038] Figure 6 A schematic diagram of a cigarette end sealing cylinder and a circumferentially heated aerosol generating device equipped with the second embodiment.
[0039] List of reference numerals in the attached diagram:
[0040] 1. End sealing cylinder of cigarette stick; 2. Bottom annular cigarette seal; 3. Middle annular cigarette seal; 4. Circumferential heating element. Detailed Implementation
[0041] The present invention will now be described in further detail with reference to the embodiments.
[0042] Those skilled in the art will understand that the following embodiments are for illustrative purposes only and should not be construed as limiting the scope of the invention. Where specific techniques or conditions are not specified in the embodiments, they are performed in accordance with the techniques or conditions described in the literature in the field or according to the product instructions. Materials or equipment whose manufacturers are not specified are all conventional products that can be obtained by purchase.
[0043] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we say an element is “connected” to another element, it can be directly connected to the other element, or there may be an intermediate element. Furthermore, the term “connected” as used herein can include wireless connections.
[0044] In the description of this invention, unless otherwise stated, "a plurality of" means two or more. The terms "inner," "upper," "lower," etc., indicate the orientation or state relationship based on the orientation or state relationship shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.
[0045] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "equipped with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0046] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the meaning consistent with their meaning in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless defined as herein.
[0047] Figure 1 This is a side view of the cigarette end sealing cylinder in the X direction according to the first embodiment.
[0048] Figure 2 This is a Y-direction side view of the cigarette end sealing cylinder of the first embodiment.
[0049] Figure 3 This is a perspective view of the cigarette end sealing cylinder according to the first embodiment.
[0050] Figure 1-3 As can be seen, the cigarette end sealing cylinder is a hollow cylindrical structure with a bottom seal, and its inner wall is provided with a bottom annular cigarette seal located at the bottom of the cigarette end sealing cylinder;
[0051] The bottom annular sealing element is used to seal the gap between the heated cigarette's smoking section and the cigarette end sealing cylinder.
[0052] From the top to the bottom of the cigarette end sealing cylinder, the cross-sectional area of the hollow portion of the bottom annular cigarette seal gradually decreases.
[0053] The cross-sectional perimeter of the hollow portion of the bottom annular cigarette seal remains constant or decreases by no more than 5%.
[0054] From the top to the bottom of the cigarette end sealing cylinder, the cross-section of the hollow portion of the bottom annular cigarette seal changes from an initial circle to a rectangle, but it can also become elliptical or racetrack-shaped. The ratio of the area of the circle to the area of the inner cavity of the cigarette end sealing cylinder is 85% to 98%.
[0055] Figure 4This is a schematic diagram of a circumferentially heated aerosol generating device equipped with a first type of cigarette end-sealing cylinder. When the heated cigarette is inserted into the cigarette end-sealing cylinder, the bottom annular cigarette seal compresses the smoking section of the heated cigarette, causing deformation at its bottom. This increases the tobacco density, improves the heat conduction rate of the smoking section, accelerates the heating rate, and enhances the aerosol concentration and puff-by-puff stability. Furthermore, the porosity of the downstream undeformed portion of the smoking section remains unchanged, preserving the diffusion of the generated aerosol substances downstream. The cigarette end-sealing cylinder also seals the upstream end face of the smoking section, preventing outside air from entering during inhalation.
[0056] Figure 5 This is a side view of the cigarette end sealing cylinder in the X direction according to the second embodiment.
[0057] The cigarette end sealing cylinder is a hollow cylindrical structure with a sealed bottom. Its inner wall is provided with a central annular cigarette seal located in the middle of the cigarette end sealing cylinder. There are multiple central annular cigarette seals, spaced apart along the axial direction of the cigarette end sealing cylinder. The central annular sealing element is used to seal the gap between the heated cigarette's smoke-generating section and the cigarette end sealing cylinder.
[0058] From the top to the bottom of the cigarette end sealing cylinder, the cross-sectional area of the hollow portion of the central annular cigarette seal gradually decreases to facilitate cigarette insertion. The circumference of the hollow portion of the central annular cigarette seal remains constant.
[0059] From the top to the bottom of the cigarette end sealing cylinder, the cross-section of the hollow portion of the central annular cigarette seal changes from an initial circle to a rectangle, but it can also become elliptical or racetrack-shaped. The ratio of the area of the circle to the area of the inner cavity of the cigarette end sealing cylinder is 85% to 98%.
[0060] The ratio of the distance between the top surface of the central annular sealing element and the bottom of the cigarette end sealing cylinder to the height of the cigarette end sealing cylinder is 0.2 to 0.8.
[0061] Figure 6 This is a schematic diagram of the structure of the cigarette end sealing cylinder and the circumferentially heated aerosol generating device equipped with the second embodiment. The middle annular cigarette seal can basically achieve the same effect as the bottom annular cigarette seal described above.
[0062] The middle annular cigarette seal and the bottom annular cigarette seal are preferably elastic elements.
Claims
1. A sealing cylinder for the end of a cigarette stick, characterized in that, The cigarette end sealing cylinder is a hollow cylindrical structure with a bottom seal, and its inner wall is provided with: a bottom annular cigarette seal located at the bottom of the cigarette end sealing cylinder, and / or a middle annular cigarette seal located in the middle of the cigarette end sealing cylinder. The bottom annular cigarette seal and / or the middle annular cigarette seal are used to seal the gap between the heated cigarette smoke-generating section and the cigarette end sealing cylinder; From the top to the bottom of the cigarette end sealing cylinder, the cross-sectional area of the hollow portion of the bottom annular cigarette seal or the middle annular cigarette seal gradually decreases.
2. The cigarette end sealing cylinder according to claim 1, characterized in that, The cross-sectional perimeter of the hollow portion of the bottom annular cigarette seal or the middle annular cigarette seal remains constant or decreases by no more than 5%.
3. The heated cigarette smoking device according to claim 1, characterized in that, From the top to the bottom of the cigarette end sealing cylinder, the cross-section of the hollow portion of the bottom annular cigarette seal or the middle annular cigarette seal changes from an initial circle to a rectangle, an ellipse, or a racetrack shape.
4. The heated cigarette smoking device according to claim 1, characterized in that, The number of the central annular cigarette seals may be single or multiple; Multiple central annular cigarette seals are arranged at axial intervals along the end sealing cylinder of the cigarette stick.
5. The heated cigarette smoking device according to claim 4, characterized in that, The ratio of the area of the initial circle to the area of the inner cavity of the cigarette end sealing tube is 85% to 98%.
6. The cigarette end sealing cylinder according to claim 1, characterized in that, The height of the bottom annular sealing element is 0.1 to 0.8 times the height of the cigarette end sealing cylinder; The ratio of the distance between the top surface of the central annular sealing element and the bottom of the cigarette end sealing cylinder to the height of the cigarette end sealing cylinder is 0.2 to 0.
8. The top surface of the bottom annular cigarette seal is connected to the top surface of the cigarette end sealing cylinder by a ramp to facilitate cigarette insertion. The top surface of the central annular cigarette seal at the very top is connected to the top surface of the cigarette end sealing cylinder by a ramp to facilitate cigarette insertion.
7. The cigarette end sealing cylinder according to claim 1, characterized in that, The inner wall of the bottom annular sealing element is sloped.
8. A heated cigarette smoking device, characterized in that, The heated cigarette device includes: a cigarette end sealing cylinder as described in any one of claims 1-7, and a heat source located circumferentially around the cigarette end sealing cylinder.
9. A heated cigarette system, characterized in that, The heated cigarette system includes the bottom-sealed heated cigarette device and heated cigarette as described in claim 8; The cross-sectional perimeter of the hollow portion of the bottom annular cigarette seal or the middle annular cigarette seal remains constant, and this perimeter is equal to the cross-sectional perimeter of the heated cigarette smoke-generating section; or, from the top to the bottom of the cigarette end sealing cylinder, the cross-sectional perimeter of the hollow portion of the bottom annular cigarette seal or the middle annular cigarette seal decreases by no more than 5%, and the cross-sectional perimeter of the hollow portion of the topmost bottom annular cigarette seal or the middle annular cigarette seal is equal to the cross-sectional perimeter of the heated cigarette smoke-generating section.
10. The heated cigarette system according to claim 9, characterized in that, The heated cigarette includes: a smoke-generating section, a smoke-mixing section, and a filter section; the smoke-mixing section is a hollow cylinder, and the sidewall of the smoke-mixing section has through holes.