A closed-end heating cigarette system, a heating cigarette, a heating smoking set and a control method thereof

Abstract

The application provides a closed-end heating cigarette system, a heating cigarette, a heating smoking set and a control method thereof, and relates to the technical field of heat-not-burn tobacco products. The cigarette comprises a substrate section and a hollow section. The side wall of the hollow section is provided with a plurality of air inlet holes. The air resistance of the airflow channel formed by all the air inlet holes in the hollow section is not less than 450 pa. When the substrate section is inserted into the cigarette accommodating cavity of the heating smoking set, the distal end of the substrate section can seal the cigarette accommodating cavity to form a closed space. The pressure change data in the closed space when the filter section is smoked is used to control and adjust the working state of the heating smoking set. The application has the beneficial effect that when the closed-end heating cigarette is smoked, a negative pressure within a specific range is formed in the closed space. By detecting the sensing pressure difference in the closed space, the smoking behavior can be accurately perceived according to the sensing pressure difference data, and user usage habit data can be obtained. The application solves the pain point that the closed heating cigarette cannot measure the smoking behavior, and facilitates the rapid measurement of user behavior characteristics.

Description

Technical Field

[0001] This application relates to the field of heated tobacco products technology, specifically to a closed-end heated cigarette system, a heated cigarette stick, a heated smoking device, and a control method thereof. Background Technology

[0002] Heated cigarettes, as low-temperature heated non-combustible tobacco products, generate aerosols through controlled heating of the smoke-generating matrix. Their physical configuration directly determines the airflow path, thermodynamic properties, and temperature field distribution, thus affecting aerosol generation efficiency, compositional consistency, and product sensory quality. The industry's mainstream configurations are divided into two categories: Open-Ended and Close-Ended, which differ fundamentally in their air intake methods, flow field distribution, and heat exchange mechanisms.

[0003] The open-ended configuration employs a bottom-direct air intake structure. When external cold air enters the heating chamber through the bottom vents, the short preheating path and insufficient preheating, coupled with abrupt changes in flow resistance caused by abrupt changes in the flow channel cross-section, lead to intense heat and momentum exchange on and around the heating element surface. This results in significant local temperature and pressure gradients, causing large fluctuations in the system temperature difference ΔT and pressure difference ΔP during the heating cycle. This thermal-fluid coupling instability easily leads to uneven aerosol release and poor composition consistency, making it difficult to consistently meet the requirements for suction experience and quality control.

[0004] The Close-Ended configuration blocks the direct airflow path at the bottom through a bottom-sealed structure. Instead, airflow is diverted to the heating chamber via pre-designed channels at the top or side of the cigarette. This flow field design avoids direct impact of cold air on the heating zone, significantly reducing the disturbance of the temperature field caused by convective heat transfer. Related research and patent applications have confirmed the advantages of this structure: Bin Li et al., in "Aerosol Formation and Transfer in Open- and Closed-Ended Heated Tobacco Products" (Contributions to Tobacco & Nicotine Research, 2022, 31:162-174) and Chinese patent ZL202010241676.5, clearly state that the closed-end structure can significantly reduce the impact of convective heat transfer on the smoke-generating matrix, resulting in a more uniform temperature distribution in the heating chamber and significantly suppressed thermal fluctuations. This helps to build a stable heating field, improves the controllability and reproducibility of aerosol release, and plays a positive role in reducing the generation of harmful substances and maintaining the sensory stability of the product.

[0005] However, the airflow closure and channel reconstruction caused by the closed-end structure also create technical bottlenecks in the perception of vaping behavior, acquisition of user data, and interactive control of the smoking device. For example, the closed-end cigarette disclosed in Chinese Patent ZL202010241676.5, due to the sealing of the cigarette end and the change of airflow direction, makes it difficult for heated smoking devices with airflow or pressure sensors to effectively sense the user's vaping initiation and vaping process. It is also difficult to accurately obtain usage habit data such as vaping frequency, vaping strength, and vaping duration of different users, and it is even more difficult to achieve intelligent interaction and adaptive control between the smoking device and the user. This has become the core problem restricting the intelligent upgrading and experience optimization of such products.

[0006] Furthermore, some smoking devices, such as those that use air pressure sensors to monitor changes in airflow pressure in the second cigarette holder cavity when the aerosol matrix is ​​inserted into / out of the holder cavity to control the start and stop of the device, use pressure sensors that can only detect significant pressure changes during the insertion and removal process. They cannot detect minute changes in air pressure at the closed end of the inhalation, let alone make control decisions based on minute changes.

[0007] In summary, existing closed-end heated cigarette systems possess significant advantages in thermodynamics and aerosol generation quality, but they exhibit obvious technical deficiencies in areas such as precise perception of smoking behavior, acquisition of user habit data, intelligent interaction of the device, and self-learning control. Therefore, this invention addresses these shortcomings by proposing a closed-end heated cigarette system, a heated cigarette stick, a heated device, and its control method. The aim is to achieve stable acquisition and accurate analysis of smoking data under a closed configuration, providing key components and methodological support for optimizing the device's heating system, realizing self-learning functions, and iterative product upgrades. Summary of the Invention

[0008] This invention aims to provide a method for accurately acquiring the smoking behavior of a closed-section heated cigarette. The following technical solution is provided in this application: In one aspect, a closed-end heated cigarette is provided, comprising a matrix section, a hollow section, and a filter section, wherein the sidewall of the hollow section is provided with multiple air inlets. The suction resistance of the airflow channel formed by all air inlets in the hollow section is not less than 450 Pa. When the substrate section is inserted into the cigarette holder cavity of the heated smoking device, the distal end of the substrate section can seal the cigarette holder cavity to form a closed space. When the cigarette is inhaled, the pressure difference in the closed space is between 100 Pa and 3000 Pa. The pressure change data of the closed space is used to control and adjust the working state of the heated smoking device.

[0009] Furthermore, it also includes a filter section, which is connected to the proximal end of the hollow section.

[0010] Furthermore, the hollow section has a straight tubular channel or an upstream and downstream double-expanded channel.

[0011] Furthermore, a high-resistance filter rod is provided at the far end of the substrate section. The high-resistance filter rod has a resistance higher than 900 Pa. When the high-resistance filter rod is inserted into the cigarette holder cavity of the heated tobacco device, the bottom of the high-resistance filter rod can seal the cigarette holder cavity to form a closed space.

[0012] Secondly, a heating device is provided for heating a closed-end heated cigarette stick as described above. The heating device includes a housing, a control component, a heating component, and a pressure sensor. The housing has a cigarette holder cavity for inserting a substrate segment. Inserting the substrate segment into the cigarette holder cavity enables a closed space to be formed between the distal end of the substrate segment and the cigarette holder cavity. The pressure sensor is disposed within the closed space. The control component is connected to the pressure sensor and the heating component. The control component is configured to control the operating state of the heating device according to the air pressure within the closed space.

[0013] Furthermore, a sealing component is provided around the inner wall of the cigarette holder near the bottom of the cigarette holder cavity. The cigarette holder cavity into which the matrix section is inserted contacts the sealing component, thereby sealing the cigarette holder cavity to form a closed space. The pressure sensor is located at the bottom of the cigarette holder cavity.

[0014] Furthermore, the suction resistance value within the enclosed space is not less than the suction resistance formed by the combination of the high suction resistance filter rod and the matrix section, or the suction resistance formed by the combination of the high suction resistance filter rod and the matrix section is not less than twice the suction resistance of the airflow channel formed by all the air inlets on the hollow section.

[0015] Thirdly, a closed-end heated cigarette system is provided, including the aforementioned closed-end heated cigarette stick and the aforementioned heated smoking device.

[0016] Fourthly, a control method is provided for the aforementioned closed-end heated cigarette system, and the control method includes the following steps: S1. When smoking a closed-end heated cigarette, continuously monitor the pressure difference within the closed space; S2. Compare the sensed pressure difference with the set pressure difference. When the pressure difference is not less than the set pressure difference, the cumulative number of suction ports is incremented by one. When the pressure difference is not less than the set pressure difference, the cumulative number of suction ports remains unchanged. S3. Compare the cumulative number of suction ports with the set number of suctions. When the cumulative number of suction ports is greater than the set number of suctions, stop heating the smoke set.

[0017] Furthermore, the control method also includes detecting the induced pressure difference in the enclosed space when the closed-end heated cigarette is first smoked, comparing the induced pressure difference with the starting pressure difference, and stopping the heating device when the induced pressure difference is less than the starting pressure difference, and determining that the closed-end heated cigarette is a substandard cigarette.

[0018] This application has the following beneficial effects: 1. This invention provides a closed-end heated cigarette stick and a heated smoking device. Multiple air inlets are arranged in the hollow section to form an airflow channel with a suction resistance of not less than 450 Pa. When the closed-end heated cigarette stick is inserted into the cigarette holder cavity of the heated smoking device, the distal end of the substrate section seals the cigarette holder cavity, forming a closed space. This creates a negative pressure within a specific range within the closed space when the cigarette stick is inhaled. A pressure sensor detects the pressure difference within the closed space. Based on the pressure difference data, the inhalation behavior can be accurately perceived, and user usage habit data can be obtained. This solves the problem that closed-end heated cigarettes cannot measure inhalation behavior, and facilitates rapid measurement of user behavior characteristics.

[0019] 2. This invention provides a control method applied to the above-mentioned closed-end heated cigarette stick and heated smoking device. After the user's smoking behavior occurs, the air pressure in the closed space is continuously detected, and the magnitude of the sensed pressure difference and the set pressure difference is compared to determine the number of smokings. The heated smoking device is controlled to stop working based on the cumulative number of smokings. In this way, the number of smokings can be used to control the usage time of the smoking device. Based on the user, a unique control method is generated to improve the user's sensory experience.

[0020] 3. This invention provides a control method in which multiple air inlets are set in the hollow section to form an airflow channel with a suction resistance of not less than 450 Pa, thereby creating a negative pressure within a specific range in the enclosed space. When the enclosed heated cigarette is first inhaled, the induced pressure difference in the enclosed space is detected, and the induced pressure difference is compared with the starting pressure difference. If the induced pressure difference is less than the starting pressure difference, it indicates that the inserted cigarette is not the enclosed heated cigarette of this application, and the heating device is stopped. This provides interactivity between the enclosed heated cigarette device and the user. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a cross-sectional schematic diagram of a closed-end heated cigarette stick in one embodiment of this application; Figure 2 It is in this application Figure 1 A cross-sectional schematic diagram of a closed-end heated cigarette stick inserted into a heated smoking device in the embodiment; Figure 3 This is a cross-sectional schematic diagram of a closed-end heated cigarette stick in another embodiment of this application; Figure 4This is a cross-sectional schematic diagram of a closed-end heated cigarette stick in another embodiment of this application; Figure 5 This is a cross-sectional schematic diagram of a closed-end heated cigarette stick in another embodiment of this application; Figure 6 This is a cross-sectional schematic diagram of a closed-end heated cigarette stick inserted into a heated smoking device in another embodiment of this application; Figure 7 This is a schematic diagram of the simulation experiment system for the suction resistance value formed by the overall air inlet of a closed-end heated cigarette in this application; Figure 8 This is a schematic diagram illustrating the pressure difference relationship between the upstream and downstream components of a heating fume appliance. Figure 9 This is a graph showing the change of the induced pressure difference Px detected by the pressure sensor under setting condition 1 as a function of the suction process. Figure 10 This is a graph showing the change of the induced pressure difference Px detected by the pressure sensor under setting condition 2 as the suction process changes; Figure 11 This is a graph showing the change of the induced pressure difference Px detected by the pressure sensor under setting condition 3 as the suction process changes; Figure 12 This is a graph showing the change of the induced pressure difference Px detected by the pressure sensor under setting condition 4 as a function of the suction process. Figure 13 This is a graph showing the change of the induced pressure difference Px detected by the pressure sensor under setting condition 5 as the suction process changes; Figure 14 This is a schematic diagram of pressure signal transmission in a heated smoke appliance; Figure 15 This is a control logic diagram in a control method of this application in which the number of suction ports can be used as the duration of use of the smoking device; Figure 16 This is a control logic diagram for identifying and judging inserted cigarettes in a control method of this application; Figure 17 This is a schematic diagram illustrating three uses of the control logic for heat compensation in heated smoke appliances.

[0023] In the picture: 1 / 1a / 1b / 1c, Closed-end heated cigarettes; 11. Matrix segment; 12. Hollow section; 12a. Upstream of the hollow section; 12b. Downstream of the hollow section; 13. Air intake; 14. Straight tubular channel; 15. Upstream and downstream dual expansion channels; 16. Filter tip section; 17. High suction resistance filter rod; 2. Heated smoke set; 21. Outer shell; 22. Control components; 23. Heating components; 24. Cigarette holder cavity; 241. Enclosed space; 25. Pressure sensor; 26. Sealing components; 26a. Shrinkage opening structure; 27. Battery; 28. Pressure sensor data transmission line; 29. Heating system control connection cable; 210. Start / Stop switch; 3. Suction unit. Detailed Implementation

[0024] The detailed features and advantages of this application are described below in the specific embodiments. The content of this description is sufficient to enable any person skilled in the art to understand the technical content of this application and implement it accordingly. Based on the specification, claims and drawings disclosed in this specification, a person skilled in the art can easily understand the related objectives and advantages of this application.

[0025] The invention will now be described with reference to the accompanying drawings, in which similar reference numerals denote similar elements. While specific structures and arrangements are discussed, it should be understood that this is done merely for illustrative purposes. Those skilled in the art will recognize that other structures and arrangements can be used without departing from the spirit and scope of the invention. It will be apparent to those skilled in the art that the invention can also be used in a variety of other applications.

[0026] In this specification and claims, several terms will be used, and unless otherwise indicated, these terms will be defined to have the following meanings: The singular forms “a” and “” include their corresponding plural forms. “At least one” means one or more, and “more” means two or more. “At least one of the following” or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can be expressed as: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0027] All figures used to represent component amounts, properties (e.g., molecular weight), reaction conditions, etc., should be considered to be modified in all cases by the terms "within the unavoidable margin of error" or "about". Therefore, the numerical values ​​set forth herein are approximate and may vary depending on the desired properties sought to be obtained by the present invention. The principles of equivalents, which are applied to a minimum and not intended to limit the scope of the claims, should be applied, for example, each value should be interpreted at least according to the reported significant digits and by applying conventional rounding techniques.

[0028] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural. Additionally, the character " / " in this article generally indicates an "or" relationship between the preceding and following related objects, but it can also represent an "and / or" relationship. Please refer to the context for a more accurate understanding.

[0029] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed during use. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0030] Unless otherwise indicated, the following abbreviations have the following meanings, and any other abbreviations used herein but not defined have their generally accepted standard meanings: All other terms used herein for special definition are intended to have the general meaning understood by one of ordinary skill in the art, in particular meaning that one of ordinary skill in the art can directly and without doubt determine how the technical solutions of the invention can be implemented after reading the claims, specification and drawings.

[0031] Even if there are incomplete descriptions, omissions, or ambiguities in the grammar, words, punctuation, graphics, symbols, etc. of the claims, specification, and drawings of this invention, those skilled in the art can still arrive at the only correct understanding by reading the claims, specification, and drawings as a whole without extensive reasoning or experimentation, and effectively exclude various incorrect interpretations that are not aimed at achieving the purpose of this invention.

[0032] Those skilled in the art will first choose to read the claims, specification, and drawings of this invention to reasonably interpret the terms; secondly, they will choose to refer to the relevant definitions in other documents published by the applicant before the filing date to reasonably interpret the terms; thirdly, they will choose the references cited in this invention to reasonably interpret the terms; and finally, they will choose to combine the technical dictionaries, technical manuals, reference books, textbooks, national or industry technical standards, etc., commonly used by those skilled in the art to reasonably interpret the terms.

[0033] The matrix segment of low-temperature heated non-combustible tobacco products such as closed-end heated cigarettes is an aerosol-generating matrix, which generates aerosols through heating that can be directly inhaled into the user's lungs through the user's mouth.

[0034] The aerosol generating matrix is ​​a solid aerosol generating matrix. An aerosol generating matrix may include both solid and liquid components. For example, an aerosol generating matrix may include tobacco materials. Specifically, an aerosol generating matrix may include tobacco leaves, tobacco stems, or substances processed from them. More specifically, an aerosol generating matrix may include pulverized tobacco leaves, pulverized reconstituted tobacco, expanded pipe tobacco, expanded stems, and reconstituted tobacco.

[0035] Preferably, the aerosol-generating matrix includes nicotine. In some preferred embodiments, the aerosol-generating matrix includes tobacco.

[0036] If the aerosol generating matrix is ​​a solid aerosol generating matrix, then the solid aerosol generating matrix may include one or more of the following: powder, granules, pellets, fragments, strips, strips or sheets, and contains one or more of the following: herbaceous plant leaves, tobacco leaves, tobacco ribs, flat tobacco and homogeneous tobacco.

[0037] Alternatively, the solid aerosol generating matrix may contain tobacco volatile aromatic compounds or non-tobacco volatile aromatic compounds released when the solid aerosol generating matrix is ​​heated. The solid aerosol generating matrix may also contain one or more capsules, which include, for example, additional tobacco volatile aromatic compounds or non-tobacco volatile aromatic compounds, and such capsules may melt during heating of the solid aerosol generating matrix.

[0038] Alternatively, the solid aerosol generating matrix can be disposed on or embedded in a heat-stabilized carrier. The carrier can be in the form of powder, granules, pellets, fragments, strips, bars, or sheets. The solid aerosol generating matrix can be arranged on the surface of the carrier, for example, in the form of sheets, foams, gels, or slurries. The solid aerosol generating matrix can be placed on the entire surface of the carrier, or alternatively, it can be patterned to provide uneven fragrance delivery during use.

[0039] Alternatively, the outer packaging material of the aerosol generation matrix segment may be an airtight material or a material with controllable air permeability.

[0040] The aerosol generating matrix can be in the form of a plug, which includes aerosol-forming materials defined by paper or other packaging materials. In the case where the aerosol generating matrix is ​​in the form of a plug, the entire plug comprising any packaging paper is considered to be the aerosol generating matrix.

[0041] Preferably, the aerosol generating matrix includes a plug, which comprises an aggregate of homogeneous tobacco material or other aerosol forming material surrounded by packaging material.

[0042] In this application, "aerosol forming agent" is used to describe any suitable known compound or mixture of compounds that promotes aerosol formation in use and is substantially resistant to thermal degradation at the operating temperature of the aerosol-generated article.

[0043] Suitable aerosol forming agents are known in the art and include, but are not limited to: polyols, such as propylene glycol, triethylene glycol, 1,3-butanediol, and glycerol; esters of polyols, such as glycerol monoacetate, glycerol diacetate, or glycerol triacetate; and aliphatic esters of mono-, di-, or polycarboxylic acids, such as dimethyl dodecanoate and dimethyl tetradecanoate. Preferred aerosol forming agents are polyols or mixtures thereof, such as propylene glycol, triethylene glycol, 1,3-butanediol, and most preferably glycerol.

[0044] The aerosol generating matrix may include a single aerosol forming agent. Alternatively, the aerosol generating matrix may include a combination of two or more aerosol forming agents.

[0045] Preferably, the aerosol generating matrix has an aerosol forming agent content of more than 5% by dry weight. More preferably, the aerosol generating matrix may have an aerosol forming agent content between about 5% and about 30% by dry weight. In one embodiment, the aerosol generating matrix has an aerosol forming agent content of about 20% by dry weight.

[0046] Please refer to Figure 1 An embodiment of the present invention provides a closed-end heated cigarette stick 1, including a matrix section 11 and a hollow section 12. The sidewall of the hollow section 12 is provided with a plurality of air inlets 13. The hollow section 12 has a straight tubular channel 14 inside. The air inlets 13 penetrate the sidewall of the hollow section 12 and communicate with the tubular channel. External air enters the straight tubular channel 14 through each air inlet, and a regular negative pressure is formed in the straight tubular channel 14 during the inhalation process.

[0047] like Figure 2As shown, this embodiment further provides a heated smoking device 2 for heating a closed-end heated cigarette stick 1. The heated smoking device 2 includes a housing 21, a control component 22, a heating component 23, and a pressure sensor 25. The housing 21 forms a cigarette holder cavity 24 into which a substrate segment 11 is inserted. Inserting the substrate segment 11 into the cigarette holder cavity 24 enables the distal end of the substrate segment 11 to form a closed space 241 between the substrate segment 11 and the cigarette holder cavity 24. The pressure sensor 25 is disposed within the closed space 241. The control component 22 obtains a pressure signal from the pressure sensor 25 and provides controllable power energy to the heating component 23. The control component 22 is configured to control the operating state of the heated smoking device 2 according to the air pressure within the closed space 241.

[0048] The cigarette holder cavity 24 is generally located at the near end of the outer shell 21, and its shape is adapted to the far end of the closed-end heated cigarette 1, that is, the shape of the matrix section 11. For example, the shape of the cigarette holder cavity 24 and the matrix section 11 are both cylindrical.

[0049] The outer wall of the substrate segment 11 is squeezed and sealed against the inner wall of the cigarette receiving cavity 24, forming a closed space 241 between the distal end of the substrate segment 11 and the cigarette receiving cavity 24. The closed-end heated cigarette 1 is inserted into the cigarette receiving cavity 24 through the substrate segment 11. The outer wall of the substrate segment 11 and the inner wall of the cigarette receiving cavity 24 are tightly fitted together to form a compression operation, thus forming a closed space 241 between the distal end of the substrate segment 11 and the cigarette receiving cavity 24.

[0050] like Figure 2 As shown, a sealing component 26 is provided around the inner wall of the cigarette receiving cavity 24 near the bottom. The substrate segment 11, inserted into the cigarette receiving cavity 24, contacts the sealing component 26. The distal end of the substrate segment 11, near the bottom of the cigarette receiving cavity 24, is pressed against the sealing component 26, thereby sealing the cigarette receiving cavity 24 to form a closed space 241. The pressure sensor 25 is located at the bottom of the cigarette receiving cavity 24. This design allows the substrate segment 11 to be smoothly inserted into the cigarette receiving cavity 24 while ensuring a good seal between the sealing component 26 and the outer wall of the substrate segment 11. The sealing component 26 can be an elastic ring, preferably an elastic ring with a sealing lip. The material can be rubber or silicone. Using silicone ensures that no harmful substances are produced during long-term heating.

[0051] When the cross-section of the sealing component 26 is circular along the overall axial direction, the inner diameter of the matrix section 11 will shrink directly due to the annular seal, which will simultaneously reduce the outer circumference of the matrix section 11 fitted outside the sealing component 26. If the reduction in the circumference of the matrix section 11 is too large, three types of problems will occur: first, the cigarette paper will wrinkle, which will easily lead to air leakage defects under sealing conditions; second, the end of the cigarette will undergo significant deformation; and third, the wrinkles in the cigarette paper will reduce the overall appearance quality of the cigarette.

[0052] Therefore, the following structural limitations are made: the cross-sectional area of ​​the hollow cavity in the sealing component 26 gradually decreases from downstream to upstream, and its cross-sectional perimeter remains constant. This perimeter is equal to the outer perimeter of the heated cigarette matrix section 11, or the reduction in perimeter does not exceed 3%. This structure ensures that the sealing component 26 does not significantly change the original perimeter of the cigarette paper during the extrusion fitting process, thereby preventing wrinkles in the cigarette paper and eliminating the problem of air leakage.

[0053] For example, such as Figure 6 As shown, the sealing component 26 can also adopt a shrinkage structure 26a. The shrinkage structure 26a is located at the bottom of the cigarette receiving cavity 24. The diameter of the shrinkage structure 26a gradually decreases along the direction close to the bottom of the cigarette receiving cavity 24. The shrinkage structure 26a is elastic, so that the substrate segment 11 is pressed tightly by the shrinkage structure 26a when inserted into the bottom of the cigarette receiving cavity 24.

[0054] Under the premise of constant perimeter, the area of ​​a circular cross-section is at its maximum. Based on this, the preferred structure is: the cross-section of the hollow part of the contraction structure 26a gradually transitions from an initial circle to a rectangle, ellipse, or racetrack shape from downstream to upstream. Under the same perimeter conditions, the cross-sectional areas of the rectangular, elliptical, and racetrack shapes are all smaller than those of the circular cross-section, which can achieve a more compact radial compression effect on the matrix segment 11.

[0055] Due to the relativity of sealing and the absoluteness of leakage, leakage occurs when the cigarette receiving cavity 24 comes into contact with the port of the cigarette matrix section 11 to achieve a seal. Therefore, it is necessary to limit the suction resistance value within the closed space 241. Preferably, the suction resistance value within the closed space 241 is not less than the suction resistance formed by the combination of the high suction resistance filter rod 17 and the matrix section 11, or the suction resistance formed by the combination of the high suction resistance filter rod 17 and the matrix section 11 is not less than twice the suction resistance of the airflow channel formed by all the air inlets 13 on the hollow section 12, such as generally at least greater than 900 Pa (90 mm water column).

[0056] The total suction resistance of the airflow channel formed by all the air inlets 13 in the hollow section 12 is not less than 450 Pa, and also needs to be controlled below 2000 Pa. In other specific embodiments, the total suction resistance of the airflow channel formed by all the air inlets 13 in the hollow section 12 is 450 Pa to 950 Pa, 950 Pa to 1450 Pa, or 1450 Pa to 2000 Pa. This can not only more stably monitor the air pressure in the closed space 241, but also enhance the extraction of aerosols generated in the matrix section.

[0057] The high-resistance filter rod 17 in the cigarette, along with the matrix section 11, hollow section 12, and filter tip section 16, can have lengths ranging from 5 to 15 mm, 8 to 18 mm, 10 to 35 mm, and 5 to 15 mm respectively, resulting in a combined length of 40 to 60 mm. The matrix bulk density in the matrix section 11 is controlled at 0.3 g / cm³.3 ~0.6g / cm 3 When using cellulose acetate tow in the filter tip, the denier should be greater than 6.0, preferably greater than 10.

[0058] The matrix section 11 is composed of substances that can be heated to generate or migrate to form smoke aerosols. The hollow section 12 is composed of a cylindrical hollow structure with a certain wall thickness. The side wall of the hollow section 12 has multiple through-holes 13. All the air inlets 13 together form an airflow channel with a suction resistance of not less than 450 Pa. The filter section 16 is directly inhaled by the user. When the closed-end heated cigarette stick 1 is inhaled, inserting the closed-end heated cigarette stick 1 into the cigarette receiving cavity 24 of the heated smoking device 2 can seal the cigarette receiving cavity 24 at the far end of the matrix section 11 to form a closed space 241. During the user's inhalation, the airflow passes through the airflow channel and forms a pressure difference. The airflow enters the airflow channel formed by each air inlet 13 and enters the central control section, forming a regular negative pressure during the inhalation process. This results in a negative pressure within a specific range within the closed space 241 when the closed-end heated cigarette stick 1 is inhaled. By detecting the air pressure inside the enclosed space 241, the suction behavior can be accurately sensed based on the air pressure data, and user usage habit data can be obtained.

[0059] The diameter of the air inlet 13 is related to the thickness of the sidewall of the hollow section 12 and the number of air inlets 13. For example, when all the air inlets 13 together form an airflow channel with a suction resistance of 800 Pa, if the number of air inlets 13 N is 1, 4, or 10, the diameter of the air inlets 13 can be determined to be between 0.4 mm and 1.0 mm through fluid dynamics calculations.

[0060] For example, the specific calculation process is as follows: When the pipe wall thickness The inhaled gas is air.

[0061] When N=1 (only 1 hole is drilled): (1) When N=4 (4 holes are drilled, and the flow is evenly distributed): (2) When N=10 (10 holes): (3) In practical applications, provided that the overall suction resistance of all air inlets 13 meets the requirements, the number and diameter of the air inlets 13 can be flexibly set. For example, when the overall suction resistance of all air inlets 13 is 450 Pa to 2000 Pa, the number of air inlets 13 is 4 to 16, and the diameter of the air inlets 13 decreases as the number of air inlets increases.

[0062] like Figure 4 As shown, in some embodiments, a closed-end heated cigarette 1b of the present invention further includes a filter section 16, which is connected to the proximal end of the hollow section 12. The filter section 16 reduces the temperature of the smoke to prevent scalding the mouth and causes water vapor, glycerin, etc. in the smoke to condense in the filter, reducing the humidity of the smoke and improving the dry taste.

[0063] like Figure 3 As shown, in some embodiments, the hollow section 12 of a closed-end heated cigarette stick 1a of the present invention has an upstream and downstream double expansion channel 15. The exemplary upstream and downstream double expansion channel 15 is an upstream and downstream funnel-shaped double expansion channel. External air enters the upstream and downstream double expansion channel 15 through each air inlet, forming a regular negative pressure in the upstream and downstream double expansion channel 15 during the suction process.

[0064] Further as Figure 5 As shown, in some embodiments, a high-resistance filter rod 17 is provided at the distal end of the matrix section 11 of a closed-end heated cigarette stick 1c of the present invention. The high-resistance filter rod 17 has a draw resistance higher than 900 Pa. When the high-resistance filter rod 17 is inserted into the cigarette holder cavity 24 of the heated cigarette device 2, the bottom of the high-resistance filter rod 17 can seal the cigarette holder cavity 24 to form a closed space 241. The length of the high-resistance filter rod 17 can be controlled between 3-10 mm. Its material can be a porous material or an ultra-low denier cellulose acetate material, with a denier of at least less than 3.0.

[0065] The high-resistance filter rod 17 is combined with the filter section 16 to maintain the aesthetic appearance of the closed-end heated cigarette 1. However, since the filter section 16 is downstream of the hollow section 12, the arrangement of the air inlet 13 on the hollow section 12 is unrelated to the draw resistance of the filter section 16. On the other hand, the high-resistance filter rod 17 is upstream of the hollow section 12, and the arrangement of the air inlet 13 on the hollow section 12 must comprehensively meet the requirements of the airflow channel outlet. That is, the draw resistance value entering the hollow section 12 is related to the sealing material of the upstream high-resistance filter rod 17. In order to ensure the sealing of the closed space 241, the draw resistance of the high-resistance filter rod 17 is higher than 900 Pa.

[0066] In a preferred embodiment, the outer wall of the matrix segment 11 is squeezed and sealed against the inner wall of the cigarette receiving cavity 24, forming a closed space 241 between the distal end of the matrix segment 11 and the cigarette receiving cavity 24. The closed-end heated cigarette 1 is inserted into the cigarette receiving cavity 24 through the matrix segment 11, and the outer wall of the matrix segment 11 is tightly fitted against the inner wall of the cigarette receiving cavity 24 to form a compression operation, thereby forming a closed space 241 between the distal end of the matrix segment 11 and the cigarette receiving cavity 24.

[0067] like Figure 2As shown, a sealing component 26 is provided around the inner wall of the cigarette receiving cavity 24 near the bottom. The cigarette receiving cavity 24 into which the substrate segment 11 is inserted comes into contact with the sealing component 26, thereby sealing the cigarette receiving cavity 24 to form a closed space 241. The pressure sensor 25 is located at the bottom of the cigarette receiving cavity 24. The sealing component 26 is preferably an elastic ring, such as a rubber ring, which can both allow the substrate segment 11 to be smoothly inserted into the cigarette receiving cavity 24 and ensure a good sealing effect between the sealing component 26 and the outer wall of the substrate segment 11.

[0068] Due to the relativity of sealing and the absoluteness of leakage, leakage occurs when the cigarette receiving cavity 24 comes into contact with the port of the cigarette matrix section 11 to achieve a seal. Therefore, it is necessary to limit the suction resistance value within the closed space 241. Preferably, the suction resistance value within the closed space 241 is not less than the suction resistance formed by the combination of the high suction resistance filter rod 17 and the matrix section 11, or the suction resistance formed by the combination of the high suction resistance filter rod 17 and the matrix section 11 is not less than twice the suction resistance of the airflow channel formed by all the air inlets 13 on the hollow section 12, such as generally at least greater than 900 Pa (90 mm water column).

[0069] The heating component 23 is composed of components that can provide heat to the outside through conduction, convection, radiation, or by giving energy to the substrate section 11 so that it receives energy and generates heat. Specifically, the heating component 23 can provide heat to the substrate section 11 in the cigarette holder cavity 24 through resistance, electromagnetic, light wave and radio frequency technology so that the substrate section 11 in the cigarette holder cavity 24 can obtain energy. The way it obtains heat is through conduction, convection, radiation and the molecular vibration of the substrate section 11 itself, either directly or indirectly.

[0070] When using resistance heating, preferably, the substrate section 11 is in contact with the wall of the cigarette holder cavity 24 to enhance the heat flux between the heating component 23 and the substrate section 11.

[0071] When using electromagnetic heating, if the electromagnetic induction body is on the outer periphery of the heating component 23, preferably, the substrate section 11 is in contact with the wall of the cigarette receiving cavity 24 to enhance the heat flux between the heating component 23 and the heated substrate section 11; if the electromagnetic induction body is inside the heated substrate section 11, there is no preference for it to be in contact with the wall of the cigarette receiving cavity 24, and normal clamping is sufficient. Preferably, the cigarette and smoking device with the substrate section 11 inserted into the cigarette receiving cavity 24 are inverted, and the friction formed by the combination of the surface of the substrate section 11 and the inner wall of the cigarette receiving cavity 24 and the sealing component 26 formed between the cigarette receiving cavity 24 and the substrate section 11 in the smoking device is higher than the weight of the cigarette.

[0072] When using light wave or infrared principle for heating, the light wave or infrared heat source is on the outer periphery of the heating component 23 and does not need to be close to the wall of the cigarette receiving cavity 24. Normal clamping is sufficient. Preferably, the cigarette and smoking device with the substrate section 11 inserted into the cigarette receiving cavity 24 are inverted. The frictional force formed by the combination of the surface of the substrate section 11 and the wall and the sealing component 26 formed between the cigarette receiving cavity 24 and the substrate section 11 is higher than the weight of the cigarette.

[0073] When using radio frequency technology for heating, it is not necessary to be close to the wall of the cigarette holder cavity 24; normal clamping is sufficient. Preferably, the cigarette and smoking device with the substrate segment 11 inserted into the cigarette holder cavity 24 are inverted, and the frictional force formed by the combination of the substrate segment 11 surface and the wall of the cigarette holder cavity 24 and the sealing component 26 formed between the cigarette holder cavity 24 and the substrate segment 11 is higher than the weight of the cigarette.

[0074] Pressure sensor 25 is located at the bottom of cigarette holder cavity 24, opposite to the far end of the sealed-end heated cigarette 1, and can accurately detect changes in air pressure within the sealed space 241. Control component 22 is connected to pressure sensor 25 via pressure sensor data transmission line 28, and simultaneously connected to heating component 23 via heating system control connection line 29. Pressure sensor data transmission line 28 extends from cigarette holder cavity 24, and the exit point remains closed within the sealed system.

[0075] In some embodiments, the heated smoking device 2 further includes a battery 27 for powering it. Preferably, the battery 27 has a capacity greater than the power required to smoke five of the closed-end heated cigarettes 1, so that the battery life of the heated smoking device 2 can meet the user's daily smoking needs.

[0076] like Figure 7 and 8 As shown, when the sealed-end heated cigarette stick 1 is inserted into the heated smoking device 2 and inhaled by the user, the pressure difference detected by the pressure sensor 25 within the sealed space 241 is essentially the pressure difference Px between the pressure of the sealed-end heated cigarette stick within the sealed space 241 and the ambient air pressure. Therefore, this sealed process test is converted into a series-parallel relationship of pressure difference, as shown below. Figure 8 As shown, the suction resistance ΔP is formed by the sealing component 26 that forms a closed space 241 between the cigarette holder cavity 24 and the closed-end heated cigarette 1 from upstream to downstream. 26 The suction resistance ΔP of the high suction resistance filter rod 17 17 The absorption resistance ΔP of matrix segment 11 11 The suction resistance ΔP formed by the upstream 12a of the hollow section 12 (distinguished by the drilling position) 12上 The series connection, together with the air intake hole 13 on the side wall of the hollow section 12, forms the suction resistance ΔP of the airflow channel. 13Connected in parallel, and then forming a suction resistance ΔP with the downstream hollow section 12b of the downstream section 12. 12下 The suction resistance ΔP formed by the filter section 16 16 Series connection.

[0077] The parameters of the materials and smoking accessories were set for testing, using methods such as... Figure 7 The detection system shown simulates the draw resistance value formed by all the air inlets 13 of a closed-end heated cigarette stick 1. The sealing component 26 seals the rear end of the matrix section 11. When the matrix section 11 is heated, the suction unit 3 draws the cigarette through the filter section 16. The pressure difference Px within the closed space 241 is detected by a pressure sensor. The suction unit 3 can be a user or a smoking machine.

[0078] In this embodiment, condition 1 can be set as: △P 26 ≈5000Pa; △P 17 ≈0Pa; △P 11 ≈200Pa; △P 12上 ≈0; △P 13 ≈1100Pa; △P 12下 ≈0; △P 16 ≈400Pa. The relationship between the induced pressure difference Px and the single-port suction process is as follows: Figure 9 As shown.

[0079] In this embodiment, condition 2 can be set as: △P 26 ≈3000Pa; △P 17 ≈1000Pa; △P 11 ≈200Pa; △P 12上 ≈0; △P 13 ≈1100Pa; △P 12下 ≈0; △P 16 ≈400Pa. The relationship between the induced pressure difference Px and the single-port suction process is as follows: Figure 10 As shown.

[0080] In this embodiment, condition 3 can be set as: △P 26 ≈2000Pa; △P 17 ≈1000Pa; △P 11 ≈200Pa; △P 12上 ≈0; △P 13 ≈1100Pa; △P 12下 ≈0; △P 16 ≈400Pa. The relationship between the induced pressure difference Px and the single-port suction process is as follows: Figure 11 As shown.

[0081] In this embodiment, condition 4 can be set as: △P 26 ≈1000Pa; △P17 ≈1000Pa; △P 11 ≈200Pa; △P 12上 ≈0; △P 13 ≈1100Pa; △P 12下 ≈0; △P 16 ≈400Pa. The relationship between the induced pressure difference Px and the single-port suction process is as follows: Figure 12 As shown.

[0082] In this embodiment, condition 5 can be set as: △P 26 ≈100Pa; △P 17 ≈100Pa; △P 11 ≈200Pa; △P 12上 ≈0; △P 13 ≈400Pa; △P 12下 ≈0; △P 16 ≈600Pa. The relationship between the induced pressure difference Px and the single-port suction process is as follows: Figure 13 As shown.

[0083] In this embodiment, the simulation experimental conditions in conditions 1 to 4 all meet the conditions set by this application: the suction resistance value in the closed space 241 is not less than the suction resistance formed by the combination of the high suction resistance filter rod 17 and the matrix section 11 (conditions 1 to 3), or the suction resistance formed by the combination of the high suction resistance filter rod 17 and the matrix section 11 is not less than twice the suction resistance of the airflow channel formed by all the air inlets 13 on the hollow section 12 (condition 4), or generally at least greater than 900 Pa (90 mm water column). Condition 5 does not meet the above-mentioned conditions.

[0084] A simulation experiment on the suction resistance of a closed-end heated cigarette stick 1 revealed that when the filter section 16 is inhaled, a negative pressure is formed within a specific range in the closed space 241. The induced pressure difference within the closed space 241 is generally above 100 Pa. The preferred range of the induced pressure difference within the closed space 241 is 100 Pa to 950 Pa, 950 Pa to 2050 Pa, or 2050 Pa. This ensures that when the closed-end heated cigarette stick 1 is inhaled, the induced pressure difference within the closed space 241 is within a specific detectable range, so that the working state of the heated cigarette device 2 can be controlled and adjusted based on the air pressure change data of the closed space 241.

[0085] Therefore, when the closed-end heated cigarette is inserted into the heated smoking device and inhaled by the user, the user's or the smoking device's inhalation behavior characteristics can be obtained by analyzing the changes in the sensing pressure difference Px. This characteristic data is directly input to the control unit. This data can be used to directly measure user characteristics such as the number of inhalation ports, user inhalation capacity, and real-time inhalation curve. The measurement of the number of inhalation ports can be used to control the duration of use of the smoking device. User capacity and real-time inhalation curve can be used to develop the heating system control program. This heating system control program can be optimized through calculation after multiple uses by the user, and can be automatically upgraded.

[0086] Furthermore, Embodiment 3 of the present invention provides a closed-end heated cigarette system, including the aforementioned closed-end heated cigarette stick and the aforementioned heated smoking device.

[0087] like Figure 15 As shown, Embodiment 3 of the present invention provides a control method applied to the above-mentioned heated smoke appliance 2, and the control method includes the following steps: S1. When smoking a closed-end heated cigarette 1, continuously monitor the pressure difference within the closed space 241. S2. Compare the sensed pressure difference with the set pressure difference. When the pressure difference is not less than the set pressure difference, the cumulative number of suction ports is incremented by one. When the pressure difference is not less than the set pressure difference, the cumulative number of suction ports remains unchanged. S3. Compare the cumulative number of suction ports with the set number of suctions. When the cumulative number of suction ports is greater than the set number of suctions, stop heating the smoke device 2.

[0088] Combination Figure 14 As shown, the conventional time control logic of the heated smoking device 2 is as follows: The clock recorder integrated into the control component 22 of the heated smoking device 2 tracks the smoking time. After a set duration, the use of the heated smoking device 2 is stopped; for example, after a total usage time of 4 minutes, the heated smoking device 2 is turned off. Here, the control component 22 controls the start / stop switch 210 of the heated smoking device 2 to turn it off. Simultaneously, the above method uses the number of puffs as a control for the duration of use. Specifically, the control logic is that since the cumulative number of puffs recorded is the user's puff count n, reaching the set number of puffs n... s Stop using the heating smoke appliance 2, for example, by setting the number of puffs to 14, meaning that the heating smoke appliance 2 will be turned off after 14 puffs. At this time, the pressure sensor 25 can use a threshold differential pressure sensor, for example, when the pressure exceeds 100Pa, to count the user's puffing action once; the user's puffing capacity and real-time puffing curve can be used to develop the control logic in the heating system control program.

[0089] The counting logic for the cumulative number of puffs in step S2 is as follows: The smoking device is turned on, and the user puffs. The pressure sensor 25 in the enclosed space 241 obtains the sensed pressure difference Px. When Px is less than the set pressure difference Ps, no counting occurs, and the system returns to the waiting state. If Px is greater than the set pressure difference Ps, one puff is counted. The cumulative number of puffs n is compared; if it is less than the set number of puffs n... s Return to the waiting suction state. If the number of suctions exceeds the set number n, s If the count is not reached, the heating of appliance 2 will stop. The counting control logic is synchronized with the regular time control logic, with the first to arrive taking priority.

[0090] like Figure 16 As shown, in some embodiments, a control method of this application further includes detecting the induced pressure difference in the closed space 241 when the closed-end heated cigarette 1 is first smoked, comparing the induced pressure difference with the starting pressure difference, and stopping the heating device 2 when the induced pressure difference is less than the starting pressure difference, and determining that the closed-end heated cigarette 1 is a defective cigarette.

[0091] Using the pressure data within the enclosed space 241 during the first inhalation of the sealed-end heated cigarette 1, the inserted cigarette is identified and judged, thereby controlling whether the heated cigarette device 2 operates. Specifically, the control logic is as follows: The heated cigarette device 2 is turned on, and the user inhales. The pressure sensor 25 within the enclosed space 241 obtains the induced pressure difference Px. During the first inhalation (n=1), if Px is less than the set starting pressure difference Ps, the heated cigarette device 2 is stopped, and the cigarette is determined to be either a substandard cigarette or a competing product on the market. The starting pressure difference can be the same as or different from the set pressure difference in step S2. In this embodiment, if the starting pressure difference Ps is the same as the set pressure difference in step S2 and is set to 100 Pa, and Px is consistently less than 100 Pa during inhalation, it is considered not a heated cigarette covered by this invention, and heating is immediately stopped. When Px is greater than the set starting pressure difference Ps, the control unit 22 of the heated smoke appliance 2 inputs a heating operation signal to the heating unit 23 to adjust the heating power during the smoking process. After heating is completed, the compensatory heating is paused according to the control program requirements, forming an immediate compensation for the heating during the user's behavior. The count is repeated until the smoking state is reached. After smoking again, if Px is still greater than the set pressure difference Ps, the data acquisition and function control unit 22 of the smoke appliance inputs a heating operation signal to the heating unit 23 to adjust the heating power during the smoking process to compensate for the insufficient smoke obtained during smoking. The count continues. If the count is not stopped or the time end point (normal control) is not reached, the system returns to the waiting smoking state. When the count or time end point reaches the stop control requirement, the heated smoke appliance 2 stops working.

[0092] Figure 17As shown, for the user's suction mode, the pressure difference Px obtained by the pressure sensor 25 in the enclosed space 241 changes over time, corresponding to three control methods. The first method compensates with a constant regularity after detecting that the pressure difference Px exceeds the set value. The second method can dynamically compensate based on the magnitude of the detected pressure difference Px. The third method detects the change curve of Px with the suction process time dozens or hundreds of times, and uses a self-learning method to optimize the first or second control scheme.

[0093] The control method and control logic are applicable to various heating components 23, such as resistance, electromagnetic, optical wave and radio frequency technology, which enable the matrix section 11 in the cigarette holder cavity 24 to obtain energy, but are not limited to the above heating components 23.

[0094] Furthermore, based on the same inventive concept of this control method, this application also provides an electronic device, including a memory and a processor and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the control method.

[0095] It is understood that the electronic device provided in this application corresponds to the control method provided in this application. In order to keep the specification concise, the same or similar parts can be referred to the content of the control method section, and will not be repeated here.

[0096] The control component in the aforementioned heating appliance can be embedded in the server's processor in hardware form or independent of it, or it can be stored in the server's memory in software form, with operation commands being sent to the corresponding heating appliance via the cloud. This control component can be a central processing unit (CPU), microprocessor, microcontroller, etc.

[0097] Based on the same inventive concept as this control method, embodiments of this application provide a computer-readable storage medium storing computer-readable instructions, which, when executed by a processor, implement the steps in the control method described above.

[0098] The memory in the application embodiments can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory.

[0099] The above embodiments can be implemented, in whole or in part, by software, hardware (such as circuits), firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented, in whole or in part, in the form of a computer program product.

[0100] A computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. It should be understood that in the various embodiments of this application, the sequence number of the above-described processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0101] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0102] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the devices, apparatuses, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0103] If the function of the control method is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0104] In the several embodiments provided in this application, it should be understood that the disclosed devices, apparatus and methods can be implemented in other ways.

[0105] For example, the device embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed.

[0106] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0107] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0108] In this specification, references to "an embodiment" or "a specific implementation" mean that a particular feature, structure, or characteristic described in connection with that embodiment / specific implementation is included in at least one embodiment / specific implementation of the invention. Therefore, the phrase "in one embodiment / specific implementation" appearing in various places in this specification does not necessarily refer to the same embodiment / setting, but rather to potentially different embodiments. Furthermore, specific features, structures, or characteristics may be combined in one or more embodiments / settings in any suitable manner, as will be apparent to those skilled in the art from this disclosure.

[0109] Similarly, it should be understood that in the above description of exemplary embodiments / specific implementations of the invention, various features of the invention are sometimes combined in a single embodiment / specific implementation or its figures and description, with the aim of simplifying the disclosure and aiding in the understanding of one or more of the various aspects of the invention. However, except for expressly stated instructions to the contrary or obvious technical contradictions or exclusions, the descriptive method of this application should not be construed as reflecting an intention that the claimed features of the invention are more than those expressly stated in each claim.

[0110] Conversely, the inventive aspect reflected in the claims lies in not all the features of a single foregoing disclosed embodiment / specification. Therefore, the claims following the detailed description are expressly incorporated herein, each claim existing independently as a separate embodiment / specification of the invention.

[0111] Furthermore, while some embodiments / specific implementations described herein include, but are not limited to, other features included in other embodiments / specific implementations, combinations of features from different embodiments / specific implementations are intended to be within the scope of the invention and form different embodiments / specific implementations, as will be understood by those skilled in the art. For example, in the following claims, embodiments / specific implementations of any claim can be used in any combination.

[0112] The terms and expressions used in this specification are for illustrative purposes and not for limitation. In using these terms and expressions, it is not intended to exclude any equivalents of the features or portions thereof shown and described, but rather to recognize that various modifications may be possible within the scope of the invention.

[0113] Therefore, it should be understood that although the invention has been specifically disclosed through preferred embodiments, exemplary embodiments and optional features, those skilled in the art may take variations or modifications of the concepts disclosed herein, and such variations and modifications are therefore considered to be within the scope of the invention as defined by the appended claims.

[0114] The specific embodiments given in this specification are examples of useful implementations of the present invention. It will be apparent to those skilled in the art that the present invention can be implemented using many variations of the devices, device components, and method steps disclosed in this specification.

[0115] The foregoing description of specific embodiments fully discloses the general features of the present invention, enabling others to easily modify and / or adapt such specific embodiments for various applications by applying knowledge within the scope of the art, without conducting excessive experimentation and without departing from the general concept of the present invention.

[0116] Therefore, based on the teachings and guidance provided herein, it is intended that such modifications and alterations be included within the meaning and scope of equivalents of the disclosed embodiments. It should be understood that the wording or terminology used herein is for descriptive purposes and is not intended to be limiting; thus, the wording or terminology in this specification will be interpreted by those skilled in the art based on the foregoing teachings and guidance.

[0117] Furthermore, the scope of the invention should not be limited to any of the exemplary embodiments described above, but only to the appended claims and their equivalents.

Claims

1. A closed-end heated cigarette stick, comprising a matrix section and a hollow section, wherein the sidewall of the hollow section is provided with a plurality of air inlets, characterized in that, The suction resistance of the airflow channel formed by all air inlets in the hollow section is not less than 450 Pa. The matrix segment inserted into the cigarette holder cavity of the heated smoking device can seal the cigarette holder cavity at the distal end of the matrix segment to form a closed space. When the cigarette is inhaled, the induced pressure difference in the closed space is between 100 Pa and 3000 Pa. The pressure change data of the closed space is used to control and adjust the working state of the heated smoking device.

2. A closed-end heated cigarette stick according to claim 1, characterized in that, It also includes a filter tip section, which is connected to the proximal end of the hollow section.

3. A closed-end heated cigarette stick according to claim 1, characterized in that, The hollow section has a straight tubular channel or an upstream and downstream double-expanded channel inside.

4. A closed-end heated cigarette according to any one of claims 1-3, characterized in that, The far end of the matrix section is provided with a high-resistance filter rod. The high-resistance filter rod has a resistance higher than 900 Pa. When the high-resistance filter rod is inserted into the cigarette holder cavity of the heated smoking device, the bottom of the high-resistance filter rod can seal the cigarette holder cavity to form the closed space.

5. A heated smoke appliance, characterized in that, For heating a closed-end heated cigarette as described in any one of claims 1-4, wherein the heated cigarette device includes a housing, a control component, a heating component, and a pressure sensor, the housing having a cigarette receiving cavity for inserting the substrate segment, the substrate segment being inserted into the cigarette receiving cavity such that a closed space is formed between the distal end of the substrate segment and the cigarette receiving cavity, the pressure sensor being disposed within the closed space, the control component being connected to the pressure sensor and the heating component, and the control component being configured to control the operating state of the heated cigarette device according to the air pressure within the closed space.

6. A heated smoke appliance according to claim 5, characterized in that... A sealing component is provided around the inner wall of the cigarette holder near the bottom of the cigarette holder cavity. The cigarette holder cavity into which the matrix segment is inserted contacts the sealing component, thereby sealing the cigarette holder cavity to form a closed space. The pressure sensor is located at the bottom of the cigarette holder cavity.

7. A heated smoke appliance according to claim 5 or 6, characterized in that, The suction resistance value within the enclosed space is not less than the suction resistance formed by the combination of the high suction resistance filter rod and the matrix segment, or the suction resistance formed by the combination of the high suction resistance filter rod and the matrix segment is not less than twice the suction resistance of the airflow channel formed by all the air inlets on the hollow segment.

8. A closed-end heated cigarette system, characterized in that, This includes a closed-end heated cigarette as described in any one of claims 1-4, and a heated smoking device as described in any one of claims 5-7.

9. A control method, characterized in that, Applied to a closed-end heated cigarette system as described in claim 8, the control method includes the following steps: S1. When smoking a closed-end heated cigarette, continuously monitor the pressure difference within the closed space; S2. Compare the sensed pressure difference with the set pressure difference. When the pressure difference is not less than the set pressure difference, the cumulative number of suction ports is incremented by one. When the pressure difference is not less than the set pressure difference, the cumulative number of suction ports remains unchanged. S3. Compare the cumulative number of suction ports with the set number of suctions. When the cumulative number of suction ports is greater than the set number of suctions, stop the heating device.

10. The control method according to claim 9, characterized in that: The control method further includes detecting the induced pressure difference in the enclosed space when the closed-end heated cigarette is first smoked, comparing the induced pressure difference with the starting pressure difference, and stopping the heating device when the induced pressure difference is less than the starting pressure difference, and determining that the closed-end heated cigarette is a defective cigarette.

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