Aerosol generating system

Abstract

The utility model belongs to the technical field of heating cigarettes, and particularly relates to an aerosol generating system. The aerosol generating system comprises an aerosol generating product and a heating cigarette smoking set; the aerosol-generating article comprises: an aerosol-generating substrate section having an upstream end face and a downstream end face; the aerosol generating substrate section is provided with a zigzag hole penetrating from the upstream end face to the downstream end face; the aerosol generating matrix section is cylindrical, and the ratio of the distance between the upstream end face and the downstream end face of the aerosol generating matrix section to the diameter is smaller than 1.2; the heating cigarette smoking set comprises a cigarette containing cavity and a radiation heat source located below the cigarette containing cavity. A bottom annular cigarette sealing piece is arranged at the bottom of the cigarette containing cavity, and / or a middle annular cigarette sealing piece is arranged between the bottom of the cigarette containing cavity and the top of the cigarette containing cavity.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of heating cigarettes, and particularly relates to an aerosol generating system. BACKGROUND

[0002] Traditional cigarettes, electronic cigarettes, heat-not-burn cigarettes, snus, nicotine pouches and other tobacco products all have nicotine delivery as the main consumption feature. Innovations for heat-not-burn cigarettes mainly focus on heat-not-burn cigarette structure, heating methods, and close integration with smoking accessories to promote aerosol generation in tobacco products and efficient delivery to consumers.

[0003] In terms of cigarette structure, mature heat-not-burn cigarettes are generally cylindrical with a length of 40mm-80mm and a circumference of 17mm-24mm. They generally contain an aerosol generating substrate section, a cooling section, and a filter section in the axial direction. The heating direction can be circumferential or central heating, bottom heating, or hot air heating. Circumferential heating refers to placing a heater around the aerosol generating substrate section. Central heating generally involves placing a heating body inside the aerosol generating substrate or inserting it during use to heat the aerosol generating substrate. The airflow channel design during smoking can also be divided into airflow channels provided on the matching smoking accessory or naturally formed between the cigarette and the smoking accessory. After introducing airflow into the airflow channel, the aerosol generated by heating the aerosol generating substrate is carried out, and the aerosol is delivered through the cooling section and / or filter section.

[0004] Another type of heat-not-burn cigarette (the applicant's prior applications Chinese patents 202010241676.5, 201911021676.8, 201911021823, etc.) generally consists of an aerosol generating substrate section, a hollow structure smoke mixing section, and a filter section. Specifically, the upstream end face of the aerosol generating substrate is sealed. The sealing method can be to seal the upstream end face of the aerosol generating substrate with a matching smoking accessory, or to seal it with a rod or gas barrier film with sealing function compounded on the upstream end face of the aerosol generating substrate. At the same time, an airflow channel is provided on the smoke mixing section (for example, a size-controllable hole is provided on the side wall of the hollow structure at the smoke mixing section). During smoking, the airflow does not pass through the aerosol generating substrate, and the air enters the hollow structure cavity of the smoke mixing section through the side wall hole. The fluid flow in the smoke mixing section creates a negative pressure, and the generated aerosol is extracted due to the pressure difference. The extracted aerosol mixes with the air entering from the outside through the side wall hole, and then passes through the filter section to deliver the aerosol. Since the main airflow (its weight ratio is between 92% and 98%) is the air entering from the outside through the side wall hole, this heat-not-burn cigarette does not need to cool the mixed aerosol.

[0005] Currently, both the first type of heat-not-burn cigarette with the aerosol generating substrate upstream open and the second type of technical product with the aerosol generating substrate closed always face the problems of insufficient aerosol generation, low conversion rate of effective substances of the aerosol generating substrate, long heating waiting time process, etc. in use. Generally, the product needs a waiting time of more than about 15s. The central heating method has lower aerosol generation and transfer efficiency of the aerosol generating substrate due to the limitation of the heat transfer process of the aerosol generating substrate, and needs to give the heater a higher temperature. The circumferential heating method also heats the packaging material used by the aerosol generating substrate, which is more likely to generate other substances and mix in the aerosol, bringing unnecessary odor. Of course, reducing the packaging material is also a temporary solution (Chinese patents 202310095263.4, 202310079543.6), but it also brings the problems of appearance and the risk of separation of the aerosol generating substrate section and the downstream combination, reducing the recognition of consumers to the product. Although the aerosol generation transfer efficiency of the aerosol generating substrate upstream end sealed heat-not-burn cigarette is higher than that of the aerosol generating substrate upstream end open heat-not-burn cigarette (Contributions to Tobacco & Nicotine Research, 2022, 31(3): 162-174, the overall aerosol generation and transfer efficiency can still be improved by combining the heating method and the structural characteristics.

[0006] To solve the above problems, the present application is proposed. Practical new type content

[0007] The purpose of the present application is to design an aerosol generating product, a heat-not-burn cigarette and an aerosol generating system combined with radiation heating technology based on the above-mentioned prior art.

[0008] The first aspect of the present application provides an aerosol generating product, which comprises: an aerosol generating substrate section, the aerosol generating substrate section having an upstream end face and a downstream end face;

[0009] The aerosol generating substrate section has a tortuous hole penetrating from the upstream end face to the downstream end face;

[0010] The aerosol generating substrate section is cylindrical, and the ratio of the distance between the upstream and downstream end faces of the aerosol generating substrate section to the diameter is less than 1.2; or the aerosol generating substrate section is a cuboid, and the ratio of the distance between the upstream and downstream end faces of the aerosol generating substrate section to the hydraulic diameter of the end face is less than 1.2.

[0011] The above-mentioned tortuous hole can be naturally formed, for example, naturally formed during the filling process of tobacco or other smoking materials.

[0012] Preferably, the visible light transmittance between the upstream end face and the downstream end face in the aerosol generating substrate segment is 5% to 40%.

[0013] Preferably, the aerosol generating article further comprises: a heat shielding segment downstream of the aerosol generating substrate segment.

[0014] The heat shielding segment is configured such that the projection of the light transmitted from the downstream end face in the downstream axial direction falls on the heat shielding segment.

[0015] Preferably, the heat shielding segment is a fiber bundle segment or a light blocking plate; the heat shielding segment has an axial through hole or no axial through hole.

[0016] When the heat shielding segment has an axial through hole, the heat shielding segment is configured such that the projection of the light transmitted from the downstream end face in the downstream axial direction is at a non-axial through hole position of the heat shielding segment.

[0017] The light blocking plate can be an aluminum foil plate or a gas-impermeable paper material. The heat shielding segment functions to partially intercept or partially reflect the heat radiation light back to the aerosol generating substrate segment, thereby improving the heating efficiency and reducing the heat radiation light radiated to the user.

[0018] Preferably, the aerosol generating article further comprises: a smoke mixing segment.

[0019] The smoke mixing segment is located between the aerosol generating substrate segment and the heat shielding segment; or the smoke mixing segment is located downstream of the heat shielding segment.

[0020] The smoke mixing segment has a hollow structure.

[0021] Preferably, the aerosol generating article comprises: a light reflecting layer wrapped around the periphery of the aerosol generating substrate segment. The heat shielding layer can be an aluminum foil layer or a gas-impermeable paper material.

[0022] Preferably, the visible light transmittance between the upstream end face and the downstream end face in the aerosol generating substrate segment is 5% to 15%.

[0023] Preferably, when the aerosol generating substrate segment is cylindrical, the ratio of the distance between the upstream and downstream end faces of the aerosol generating substrate segment to the diameter is 0.6 to 1.

[0024] When the aerosol generating substrate segment is a cuboid, i.e., a square brick, the ratio of the distance between the upstream and downstream end faces of the aerosol generating substrate segment to the hydraulic diameter of the end face of the aerosol generating substrate segment is 0.6 to 0.9.

[0025] The second aspect of the present application provides a heated cigarette smoking set, comprising: a cigarette accommodating cavity, a radiant heat source located below the cigarette accommodating cavity;

[0026] The bottom of the cigarette accommodating cavity is provided with a bottom annular cigarette seal, or the bottom of the cigarette accommodating cavity to the top of the cigarette accommodating cavity is provided with a middle annular cigarette seal, and the bottom annular cigarette seal and the middle annular cigarette seal are configured to seal the gap between the heated cigarette smoking segment and the cigarette accommodating cavity.

[0027] Preferably, the heated cigarette smoking set comprises a light-reflecting layer located at the periphery of the cigarette accommodating cavity. The light-reflecting layer is used to reflect the heat of the heat source back to the aerosol-generating substrate segment, reducing heat loss.

[0028] Preferably, the cross-sectional area of the hollow part of the bottom annular cigarette seal or the middle annular cigarette seal gradually decreases from downstream to upstream.

[0029] Preferably, the cross section of the bottom annular cigarette seal or the middle annular cigarette seal is circular in the entire axial direction.

[0030] Preferably, the cross-sectional circumference of the hollow part of the bottom annular cigarette seal or the middle annular cigarette seal is always constant and equal to the circumference of the smoking segment or reduced by no more than 5%.

[0031] In other words, the cross-sectional circumference of the hollow part of the bottom annular cigarette seal or the middle annular cigarette seal remains unchanged from downstream to upstream, and the circumference is equal to the cross-sectional circumference of the heated cigarette smoking segment;

[0032] Or, the cross-sectional circumference of the hollow part of the bottom annular cigarette seal or the middle annular cigarette seal is reduced by no more than 5% from downstream to upstream, and the cross-sectional circumference of the hollow part of the bottom annular cigarette seal or the middle annular cigarette seal at the most downstream is equal to the cross-sectional circumference of the heated cigarette smoking segment.

[0033] Preferably, at the most upstream, the cross section of the hollow part of the bottom annular cigarette seal or the middle annular cigarette seal is circular.

[0034] Preferably, the cross section of the hollow part of the bottom annular cigarette seal or the middle annular cigarette seal changes from an initial circular shape to an oblong shape, an elliptical shape, a racetrack shape, or a smaller circular shape from downstream to upstream.

[0035] Preferably, the ratio of the area of the initial circular shape to the area of the cigarette accommodating cavity is 85% to 98%.

[0036] The downstream end surface of the bottom annular cigarette seal is connected with the downstream end surface of the cigarette accommodating cavity by a slope.

[0037] The downstream end surface of the bottom annular cigarette seal is connected with the downstream end surface of the cigarette accommodating cavity by a slope.

[0038] The slope connection is to facilitate the insertion of the cigarette.

[0039] Preferably, the inner wall of the bottom annular cigarette seal is in a slope shape. The slope shape facilitates the insertion of the cigarette.

[0040] After the heating cigarette is inserted, it is extruded by the cigarette seal into the shape of the cross section of the hollow part of the cigarette seal.

[0041] In the research, it is found that if the cross section of the seal is circular in the whole axial direction, the circular ring seal directly reduces the inner diameter of the cylindrical smoking segment, and thus the circumference of the smoking segment is also reduced. If the circumference is reduced by more than 5%, the following disadvantages exist: 1. The cigarette paper of the cigarette is wrinkled, and the wrinkles are prone to air leakage during sealing; 2. The end of the cigarette is severely deformed, which easily causes complete opacity, and the light transmittance is not easy to control; 3. The wrinkles of the cigarette affect the aesthetic level of the cigarette.

[0042] If the cross-sectional area of the hollow part of the bottom annular cigarette seal or the middle annular cigarette seal gradually decreases from downstream to upstream, and the circumference remains unchanged, and the circumference is equal to the circumference of the heating cigarette smoking segment, or is reduced by no more than 5%, the circumference of the cigarette paper will not be significantly changed during the extrusion of the seal, and thus the cigarette paper will not be wrinkled and will not leak air.

[0043] Since the area of a circle is the largest under the condition of the same circumference, in the preferred scheme, the cross section of the hollow part of the bottom annular cigarette seal or the middle annular cigarette seal changes from a circle to a rectangle, an ellipse, or a racetrack shape from downstream to upstream. Compared with the smaller circle with the same circumference, the cross-sectional area of the rectangle, the ellipse, or the racetrack shape is smaller, and the tobacco can be compressed more tightly.

[0044] Preferably, the cigarette accommodating cavity is cylindrical.

[0045] The direction of the smoke flow in the cigarette accommodating cavity is from upstream to downstream. The upstream of the cigarette accommodating cavity is the bottom of the cigarette accommodating cavity.

[0046] Preferably, the height of the bottom annular cigarette seal is 0.5 times or less of the height of the cigarette accommodating cavity.

[0047] Preferably, the ratio of the distance between the upstream end face of the lowermost middle annular cigarette seal and the bottom of the cigarette accommodating cavity to the height of the cigarette accommodating cavity is 0.5 to 1.0 times.

[0048] Preferably, the height of the bottom annular cigarette seal is less than the length of the aerosol substrate segment. More preferably, the height of the bottom annular cigarette seal should be less than 0.5 times the length of the aerosol substrate segment. Still more preferably, the height of the bottom annular cigarette seal is between 0.05 and 0.5 times the length of the aerosol substrate segment.

[0049] Preferably, the height of the middle annular cigarette seal from the bottom of the cigarette accommodating cavity is less than the length of the aerosol substrate segment. More preferably, the height of the middle annular cigarette seal from the bottom of the cigarette accommodating cavity should be greater than 0.5 times the length of the aerosol substrate segment. Still more preferably, the height of the middle annular cigarette seal from the bottom of the cigarette accommodating cavity is between 0.5 and 1.5 times the length of the aerosol substrate segment.

[0050] In operation, the radiant heat source heats the aerosol substrate. When the length-diameter ratio of the aerosol substrate segment is less than 1.2, preferably between 0.6 and 1.0, the light transmittance is about 5% to 15%. A high light transmittance makes the radiant energy of the radiant heat source not fully utilized to generate aerosol. According to the principle that the cross-sectional area of a circle is smaller than that of an ellipse or a rectangle with the same circumference, the density of the tobacco in the aerosol substrate segment is increased, the light transmittance is reduced, and the heat conductivity is increased when the annular cigarette seal is used. Therefore, the seal has the function of changing the shape of the cigarette in addition to the functions of fixing and sealing the cigarette. This does not require changing the manufacturing process of the cigarette, and the speed of aerosol generation and the transfer efficiency are improved under the same power of the radiant heat source.

[0051] By adjusting the height and position of the seal structure and the insertion depth of the heated cigarette in the cigarette accommodating cavity, the tightness of the tobacco after being pressed by the heated cigarette can be adjusted to adjust the heat transfer effect. In addition, by controlling the insertion depth of the heated cigarette, the direct contact or a certain interval between the radiant heat source and the upstream end face of the aerosol generating substrate can be controlled. The interval distance is less than the distance between the upstream end face and the downstream end face of the aerosol generating substrate, preferably less than 0.5 times the distance between the upstream end face and the downstream end face of the aerosol generating substrate.

[0052] Preferably, the surface material of the bottom annular cigarette seal or the middle annular cigarette seal is a light-reflecting material to reduce the energy loss of heat radiation. In particular, when there is an interval between the radiant heat source and the upstream end face of the aerosol generating substrate, the light-reflecting bottom annular cigarette seal can reduce the energy loss of the radiant heat source around the interval.

[0053] The third aspect of the present application provides an aerosol generating system, comprising the aerosol generating article of any one of the first aspect and the heating cigarette apparatus of any one of the second aspect.

[0054] The aerosol generating substrate segment of the aerosol generating article is inserted into the cigarette accommodating cavity of the heating cigarette apparatus.

[0055] The bottom annular cigarette seal or the middle annular cigarette seal is configured to seal the gap between the heating cigarette smoking segment and the cigarette accommodating cavity.

[0056] The middle annular cigarette seal is located between the bottom of the cigarette accommodating cavity and the side wall through hole of the heating cigarette in the axial direction.

[0057] In the present application, the heating cigarette is the aerosol generating article. The smoking segment is the aerosol generating substrate segment.

[0058] The bottom of the cigarette accommodating cavity of the heating cigarette apparatus has a radiant heat source, which is spaced apart from or directly contacts the upstream end face of the heating cigarette.

[0059] The fourth aspect of the present application provides a method for increasing the nicotine release amount and release rate, which uses the aerosol generating article or the aerosol generating system described above.

[0060] Preferably, the nicotine release amount is the per-puff nicotine release amount or the total release amount.

[0061] The principle of the present application is as follows:

[0062] The aerosol generating article can include an aerosol generating substrate segment, a smoke mixing segment, or a heat shielding segment, etc. The side wall through hole can be provided in the smoke mixing segment or the heat shielding segment downstream of the aerosol generating substrate segment to facilitate the mixing of the aerosol formed by the entering air and the heated aerosol generating substrate in the smoking process.

[0063] The aerosol generating substrate segment is composed of one or more forms of aerosol generating substrate, which can be a filamentous or sheet-like or granular substrate form accumulation to achieve the porous state of the aerosol generating substrate segment. The porous state of the aerosol generating substrate segment formed by accumulation has at least one tortuous hole penetrating from the upstream end face to the downstream end face.

[0064] The heating cigarette smoking set comprises a cigarette accommodating cavity for placing a heating cigarette. A radiation heat source is arranged at the bottom of the cigarette accommodating cavity. A cigarette sealing member is arranged flexibly between the bottom of the cigarette accommodating cavity and a through hole in the lateral wall of the cigarette. The radiation heat source and the upstream end surface of the tobacco rod aerosol generating substrate segment form a relative relationship, i.e. the projection of the radiation heat source in the downstream axial direction falls on the upstream end surface of the aerosol generating substrate segment. The radiation heat source and the upstream end surface of the tobacco rod aerosol generating substrate segment can be in direct contact or form a certain interval.

[0065] The design basis of the present application is that the hole formed by the accumulation of the aerosol generating substrate has continuity and tortuosity. The radiation heat source radiates heat to the cigarette, and the radiated heat can uniformly act on the surface of the aerosol generating substrate involved in the tortuous hole to realize rapid heating of the aerosol generating substrate and generation of aerosol substance. When the consumer performs a puffing action, external air enters the cigarette through the through hole in the lateral wall of the smoke mixing segment arranged downstream of the aerosol generating substrate. In the smoke mixing segment, due to the negative pressure generated by the airflow, the aerosol substance naturally migrates to the negative pressure and migrates out of the smoke after mixing with the air.

[0066] Compared with the prior art, the present application has the following beneficial effects:

[0067] 1. For a cylindrical heating cigarette, in order to ensure the conversion amount of nicotine and other substances, the length-diameter ratio of the smoking segment of the heating cigarette designed in the prior art is greater than 1.5. The present application reduces the ratio of the distance between the upstream end surface and the downstream end surface of the aerosol generating substrate to the hydraulic diameter of the cigarette in the circumferential direction, and finds the following unexpected technical effects: the nicotine release per puff and the total nicotine release are improved; the use efficiency of the aerosol generating substrate is significantly improved; the heating speed of the aerosol generating substrate is significantly improved, which makes it more close to the traditional combustion type cigarette smoke generation mode, improves the aerosol concentration and the stability of each puff, and at the same time effectively reduces the use amount of the aerosol generating substrate and the tax to be paid.

[0068] 2. In the existing heating smoking set, the aerosol generating substrate segment generally has a through axial hole to facilitate the outflow of aerosol substance. For such an aerosol generating substrate segment, if a radiation heat source is used, a circumferential heating mode is generally used to make the light directly contact the aerosol generating substrate segment to maximize the heat utilization efficiency. If the radiation heat source adopts an end heating mode, since the light and the axial hole of the aerosol generating substrate segment are parallel, part of the light cannot directly contact the aerosol generating substrate, causing energy waste.

[0069] However, in the circumferential heating mode, the packaging material of the aerosol generating substrate segment is also heated, which is more likely to generate other substances and mix them in the aerosol, causing unnecessary odor.

[0070] The present application adopts an aerosol generating substrate section with tortuous holes, and the radiant heat source is corresponded to the upstream end face of the cigarette aerosol generating substrate section. In this way, the heat released by the radiant heat source directly acts on the surface of the aerosol generating substrate section through the tortuous holes of the aerosol generating substrate section, effectively improving the energy utilization rate. The present application also reduces the impurities generated by heating the outer packaging material of the aerosol generating substrate section and the cigarette smoke mixing section, such as reducing the paper taste, etc. Therefore, the present application can significantly improve the sensory quality of the product.

[0071] 3、The present application combines the heating performance of the radiant heat source, and uses the upstream closed mode of the aerosol generating substrate section to make a large amount of actively sucked flowing gas not actively enter the aerosol generating substrate section, which can effectively reduce the influence on the output heat source. This avoids the difficulty in temperature control caused by the rapid temperature drop of the aerosol substrate section after a large amount of actively sucked flowing gas enters the aerosol substrate section. Therefore, the present application reduces the control complexity of the system and improves the control accuracy of the product quality.

[0072] 4、The advantages of the annular sealing element in the present application are as follows:

[0073] (1) By improving the sealing device of the combination part of the smoking set and the cigarette, the use efficiency of the aerosol generating substrate is significantly improved; (2) Without changing the manufacturing process of the cigarette, the shape of the aerosol generating substrate of the cigarette is changed by the sealing structure of the smoking set, the tobacco density is increased, the light transmittance is reduced, the heat radiation energy conversion is more fully carried out, the heat conduction rate of the aerosol generating substrate is increased, the heating speed is faster, and the aerosol concentration and the stability of each puff are improved; (3) The change amount of the circumference of the smoking section is not changed in the extrusion process of the smoking section, so as to avoid the influence of the wrinkles of the cigarette paper on the sealing effect; (4) The sealing element is preferably made of a reflective material, which can further increase the heat radiation conversion efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0074] Figure 1a It is a schematic diagram of the overall structure of the aerosol generating article 1 of the first embodiment; Figure 1b It is a top view of the aerosol generating substrate section 1-1 as a leaf accumulation type cylinder; Figure 1c It is an axial cross-sectional view of the aerosol generating substrate section 1-1 as a leaf accumulation type cylinder; Figure 1d It is a three-dimensional CT imaging diagram of the aerosol generating substrate section 1-1 as a leaf accumulation type cylinder; Figure 1e It is a schematic diagram of the structure of the aerosol generating substrate section 1-1 as a leaf accumulation type rectangular solid; Figure 1f It is a top view of the aerosol generating substrate section 1-1 as a particle accumulation type cylinder; Figure 1g It is a schematic diagram of the structure of the aerosol generating article 1 including the aerosol generating substrate section 1-1 and the smoke mixing section 1-2; Figure 1hSchematic view of the hollow structure 1-8 of the heat shield section 1-12 perforating the communication section 1-2 of the smoke mixing section 1-1.

[0075] Figure 2 Schematic view of the structure of the heated tobacco smoking device of the second embodiment.

[0076] Figure 3 Schematic view of the structure of the aerosol generating system of the third embodiment.

[0077] Figure 4 Flowchart of the control program system in the heated tobacco smoking device of the second embodiment.

[0078] Figure 5 Schematic view of the structure of the heated tobacco smoking device of the fourth embodiment.

[0079] Figure 6 Schematic view of the structure of the aerosol generating system of the fifth embodiment.

[0080] Figure 7 Schematic view of the structure of the heated tobacco smoking device of the sixth embodiment.

[0081] Figure 8 Curve of the puff-by-puff nicotine delivery per cigarette over time of Comparative Example 1 and Examples 1-3.

[0082] Figure 9 Curve of the total nicotine delivery per cigarette over time of Comparative Example 1 and Examples 1-3.

[0083] Figure 10 Curve of the puff-by-puff nicotine delivery per cigarette over time of Comparative Example 2 and Examples 4-6.

[0084] Figure 11 Curve of the total nicotine delivery per cigarette over time of Comparative Example 2 and Examples 4-6.

[0085] Figure 12 Curve of the puff-by-puff nicotine delivery per cigarette over time of Comparative Example 3 and Examples 7-9.

[0086] Figure 13 Curve of the total nicotine delivery per cigarette over time of Comparative Example 3 and Examples 7-9.

[0087] Figure 14 Curve of the puff-by-puff nicotine delivery per cigarette over time of Comparative Example 4 and Examples 10-12.

[0088] Figure 15 Curve of the total nicotine delivery per cigarette over time of Comparative Example 4 and Examples 10-12.

[0089] List of reference signs:

[0090] 1. An aerosol generating article, 1-1, an aerosol generating substrate segment, 1-2, a smoke mixing segment, 1-3, a side wall through hole, 1-4, a meandering hole, 1-5, an upstream end face, 1-6, a cut tobacco type aerosol generating substrate, 1-7, a downstream end face, 1-8, a hollow structure, 1-9, a filter portion of the smoke mixing segment, 1-10, an outer wrapper of the smoke mixing segment and / or a heat shielding segment, 1-11, a second outer wrapper, 1-12, a heat shielding segment. 2. A heated cigarette device, 2-1, a cigarette accommodating cavity, 2-2, a radiant heat source, 2-3, a bottom of the cigarette accommodating cavity, 2-4, a bottom annular cigarette sealing member, 2-5, a space, 2-6, a battery, 2-7, a controller, 2-8, a temperature detecting element, 2-9, a power on / off controller, 2-10, a control circuit, 2-11, a special sensor such as a mechanical / optical / fluid pressure difference sensor, 2-12, a middle annular cigarette sealing member. DETAILED DESCRIPTION

[0091] The present application will be further described in conjunction with the following examples.

[0092] Those skilled in the art will appreciate that the following examples are intended to be illustrative only and should not be viewed as limiting the scope of the present application. Unless otherwise indicated, in the examples, the techniques and conditions are as described in the literature or as recommended by the manufacturer of the products used. Where the manufacturer of a product is not named, conventional products available from commercial sources are used.

[0093] Those skilled in the art will appreciate that, as used herein, singular forms "a", "an" and "the" include plural references unless the context clearly dictates otherwise. It will be further understood that the terms "comprises" and / or "comprising," as used herein, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. In addition, as used herein, "connected" can include wirelessly connected.

[0094] In the description of the present application, unless otherwise stated, "a plurality of" means two or more. The terms "inner", "upper", "lower", and the like indicate relative positions or state relationships based on the positions or state relationships shown in the drawings, and are merely used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0095] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "provided with" should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present application should be understood according to the specific circumstances.

[0096] Those skilled in the art can understand that, unless otherwise defined, all terms including technical terms and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have meanings consistent with those in the context of the prior art, and should not be interpreted to have idealized or overly formal meanings unless otherwise defined.

[0097] Figure 1a The overall structure of the aerosol generating article 1 of the first embodiment is shown in the schematic view. Figure 1b The top view of the aerosol generating substrate segment 1-1 in the form of a leaf filament accumulation type cylinder is shown. Figure 1c The axial cross-sectional view of the aerosol generating substrate segment 1-1 in the form of a leaf filament accumulation type cylinder is shown. Figure 1d The three-dimensional CT imaging view of the aerosol generating substrate segment 1-1 in the form of a leaf filament accumulation type cylinder is shown. Figure 1e The structure schematic view of the aerosol generating substrate segment 1-1 in the form of a leaf filament accumulation type rectangular solid is shown. Figure 1f The top view of the aerosol generating substrate segment 1-1 in the form of a granular accumulation type cylinder is shown. Figure 1g The structure schematic view of the aerosol generating article 1 including the aerosol generating substrate segment 1-1 and the smoke mixing segment 1-2 is shown. Figure 1h The schematic view of the heat shielding segment 1-12 perforated to communicate with the hollow structure 1-8 of the smoke mixing segment 1-2 is shown.

[0098] As shown in Figures 1a-1h The aerosol generating substrate segment 1-1 in the aerosol generating article 1 includes a single component or a mixed component of a plurality of physical forms of aerosol generating substrates. The plurality of physical forms can be divided into leaf filament, leaf blade, granular, single-layer sheet, multi-layer sheet, gel porous, etc. Figures 1a-1hThe aerosol generating substrate segment 1-1 containing single filamentous aerosol generating substrate 1-6 is shown in the middle. The aerosol generating substrate is generally accumulated under certain external stress, wherein the upstream end face 1-5 is an open end face, and the aerosol generating substrate segment 1-1 has a tortuous hole 1-4 penetrating from the upstream end face to the downstream end face. Due to the stress, the aerosol generating substrate does not separate from the surrounding packaging material under 0.1-2.5 times the acceleration of gravity, and the accumulated state can be cylindrical or cuboid (brick type) appearance under the fixation of the packaging material.

[0099] As shown in Figure 1a , if the aerosol generating substrate segment 1-1 is cylindrical in appearance, the ratio of the distance A between the upstream end face 1-5 and the downstream end face 1-7 of the aerosol generating substrate to the diameter B of the aerosol generating substrate segment 1-1 is less than 1.2, i.e. A / B < 1.2. Preferably, A / B is between 0.6 and 1.0.

[0100] As shown in Figure 1a , the aerosol generating article 1 comprises, from upstream to downstream, the aerosol generating substrate segment 1-1, the smoke mixing segment 1-2, and the heat shielding segment 1-12. The smoke mixing segment 1-2 comprises a hollow structure 1-8. The heat shielding segment 1-12 is a filter 1-9 formed by acetate fibers or other fiber bundles. In this embodiment, the filter 1-9 only contains natural interstices formed by fiber bundles, and no through holes are additionally provided to shield heat. As shown in Figure 1a , the smoke mixing segment and / or the heat shielding outer packaging material 1-10 is a gas-impermeable material or a controllable gas permeability material. As shown in Figure 1a , the smoke mixing segment 1-2 and the aerosol generating substrate 1-1 are wrapped by a second outer packaging material 1-11.

[0101] As shown in Figure 1a , the outer wall of the smoke mixing segment 1-2 is provided with side wall through holes 1-3, which are 0.5-15 mm away from the downstream end face 1-7 of the aerosol generating substrate, so that the external air is connected to the gas passage formed by the hollow structure 1-8. In a preferred embodiment, the side wall through holes 1-3 are uniformly distributed in the circumferential direction of the outer wall of the smoke mixing segment 1-2.

[0102] As shown in Figure 1e , if the aerosol generating substrate in the cigarette is in the form of a brick, the ratio of the distance A between the upstream end face 1-5 and the downstream end face 1-7 of the aerosol generating substrate to the hydraulic diameter B of the two end faces is less than 2.4, i.e. A / B < 1.2, and preferably between 0.6 and 0.9.

[0103] As shown in Figure 1fAs shown, if the aerosol generating matrix section is a particle accumulation, it also has tortuous holes 1-4 that extend from the upstream end face 1-5 to the downstream end face 1-7.

[0104] The aforementioned tortuous pores can be formed naturally during the preparation of the aerosol generation matrix segment, or they can be specially designed.

[0105] like Figure 1g As shown, the aerosol-generating product includes an aerosol-generating matrix section 1-1 and a flue gas mixing section 1-2, but does not contain a heat shielding section 1-12. Other features are as follows: Figure 1a This also enables the functionality of this application.

[0106] like Figure 1h As shown, the aerosol generating product 1 includes an aerosol generating matrix section 1-1, a flue gas mixing section 1-2, and a heat shielding section 1-12. Figure 1h In this structure, the heat shielding section 1-12 is a fiber bundle section with axial through holes on both sides, but the axial through holes are misaligned in the axial direction with the hollow structure 1-8 of the flue gas mixing section 1-2. This causes the projection of light transmitted from the downstream end face in the downstream axial direction onto the non-axial through hole position of the heat shielding section 1-12. Thus, the projection of the hollow structure 1-8 in the downstream axial direction onto the non-axial through hole position of the heat shielding section 1-12 allows the heat shielding section 1-12 to still intercept or reflect at least a portion of the light from the radiant heat source 2-2, thereby reducing the heat radiated to the consumer.

[0107] In a preferred embodiment, the visible light transmittance between the upstream end face 1-5 and the downstream end face 1-7 of the aerosol generating matrix section 1-1 is 5% to 40%, preferably between 5% and 15%. The visible light transmittance can be adjusted by adjusting the number and inner diameter of the tortuous holes 1-4.

[0108] In a preferred embodiment, the aerosol generating matrix segment 1-1 may include various forms of tobacco raw materials, specialty plant raw materials or other smoke-generating substances and components, and outer packaging materials.

[0109] In a preferred embodiment, the aerosol generating matrix contains tobacco raw materials, specialty plant raw materials, tea, or other natural plants.

[0110] The aerosol generating matrix may contain one or more of the following fuming substances: glycerol, propylene glycol, flavorings, nicotine, or nicotine salts.

[0111] In a preferred embodiment, the outer packaging material of the aerosol generating matrix segment 1 is an airtight material or a material with controllable air permeability.

[0112] In a preferred embodiment, the length of the flue gas mixing section 1-2 can be adjusted according to actual conditions, and the length of the flue gas mixing section 1-2 is 5 mm to 50 mm, preferably 30 mm to 40 mm.

[0113] Figure 2 A schematic diagram of a heating cigarette smoking set structure according to a second embodiment is shown. The heating cigarette smoking set 2 has a cigarette accommodating cavity 2-1 for placing an aerosol generating article. The inner wall of the cigarette accommodating cavity 2-1 is used to fit the outer wall of the aerosol generating article 1, in particular, to fit the outer wall of the aerosol generating substrate section 1-1 of the aerosol generating article 1. The length L of the cigarette accommodating cavity 2-1 in the axial direction (z direction) is not less than 1 / 2 of the distance A between the upstream end face 1-5 and the downstream end face 1-7 of the aerosol generating substrate section 1-1, i.e., L is not less than 1 / 2A. Preferably, the length L of the cigarette accommodating cavity 2-1 in the axial direction (z direction) is 0.6 to 1.2 times the distance A between the upstream end face 1-5 and the downstream end face 1-7 of the aerosol generating substrate section 1-1, i.e., L / A = 0.6 to 1.2.

[0114] As shown in Figure 2 The bottom of the cigarette accommodating cavity 2-1 of the heating cigarette smoking set 2 is provided with a radiation heat source 2-2. The type of the heat source can be selected from an infrared light source, a microwave radiation source, a light wave radiation source, and a hybrid wave radiation heat source having a heating function. The radiation heat source 2-2 is in a face-to-face relationship with the upstream end face 1-5 of the aerosol generating substrate 1-1 of the aerosol generating article 1. The two can be in direct contact or form a certain gap 2-5. The distance of the gap 2-5 is less than the distance A between the upstream end face 1-5 and the downstream end face 1-7 of the aerosol generating substrate section, and is preferably less than 0.5 times the distance A between the upstream end face 1-5 and the downstream end face 1-7 of the aerosol generating substrate.

[0115] As shown in Figure 2 The position between the bottom 2-3 of the cigarette accommodating cavity and the side wall through hole 1-3 of the aerosol generating article is flexibly provided with a sealing structure. The sealing structure can be: a bottom annular cigarette sealing member 2-4 provided at the bottom of the bottom 2-3 of the cigarette accommodating cavity, or a middle annular cigarette sealing member 2-12 provided in the axial direction between the bottom 2-3 of the cigarette accommodating cavity and the side wall through hole 1-3 of the aerosol generating article. The ratio of the minimum inner diameter of the bottom annular cigarette sealing member 2-4 or the middle annular cigarette sealing member 2-12 to the diameter or the hydraulic diameter of the aerosol generating substrate 1-1 is 85% to 98%, so as to form a fit-type sealing structure and seal the gap between the heating cigarette smoking section and the cigarette accommodating cavity. The heating cigarette smoking set 2 is provided with a battery 2-6, a controller 2-7, a temperature detecting element 2-8, a power on-off controller 2-9, a radiation heat source 2-2. These components are connected through a control circuit 2-10.

[0116] As shown in Figure 3As shown, an aerosol generating system combined with radiation heating technology includes an aerosol generating article 1 and a heated cigarette device 2. The aerosol generating article 1 includes an aerosol generating substrate section 1-1, a smoke mixing section 1-2, and a heat shielding section 1-12. The smoke mixing section 1-2 can be provided with a side wall through hole 1-3 to facilitate the mixing of air and substances generated by the heated aerosol generating substrate to form an aerosol during smoking.

[0117] As shown in FIG. 1, the heated cigarette device 2 includes a radiation heat source 2-2, a battery 2-6, a controller 2-7, a temperature detection element 2-8, a power start-stop controller 2-9, and a sensor 2-11. Figure 4 is a control program system flow chart in the heated cigarette device 2. The heated cigarette device 2 includes a control system formed by a power start-stop controller 2-9, a temperature detection element 2-8, a controller 2-7, and a battery 2-6 to form a control circuit 2-10 for the radiation heat source 2-2. In use, the power start-stop controller 2-9 can use manual recognition methods or other automatic recognition methods. The manual recognition method can be activated as needed. The other automatic recognition methods can use special sensors 2-11 such as mechanical / optical / fluid pressure difference, etc. The sensor recognizes that the aerosol generating article 1 is inserted and is activated, controls the current output through the settings of the controller 2-7, and forms the radiation heat output. In this process, the output heat of the radiation heat source 2-2 is controlled by the change of the temperature of the radiation element or the temperature of a specific position of the aerosol generating article 1. After a fixed time or a certain number of puffs, the power start-stop controller 2-9 is automatically turned off. During use, the power start-stop controller 2-9 can be manually controlled to be turned off or restarted.

[0118] The output power of the radiation heat source 2-2 in the heated cigarette device 2 is controlled by the controller 2-7. The output power of the battery 2-6 is controlled by the controller 2-7. The controller 2-7 is jointly controlled by the temperature detection element 2-8 and the power start-stop controller 2-9.

[0119] In combination with Figures 2-4As shown, in use, the aerosol generating article 1 is inserted into the cigarette accommodating cavity 2-1 of the heated cigarette smoking set 2 with the upstream end face 1-5 of the aerosol generating substrate segment 1-1 facing downward, the power start-stop controller 2-9 is manually or automatically started, and the radiation heat source 2-2 starts to work. Heat is quickly transferred to the upstream end face 1-5 of the aerosol generating substrate segment 1-1 of the aerosol generating article by radiation, directly heating the surface of the accumulation body. After the temperature rises, the aerosol generating substrate starts to form aerosol material. After a consumer inhales, external airflow enters the smoke mixing segment 1-2 downstream of the aerosol generating substrate 1-1 through the side wall through hole 1-3. Due to the negative pressure formed by fluid flow, and the positive pressure formed by the aerosol material generated by the aerosol generating substrate segment 1-1 at this time, the aerosol material is delivered to the smoke mixing segment 1-2 and mixed with the airflow flowing into the smoke mixing segment 1-2 to form an aerosol. Under the action of airflow flow, the aerosol reaches the outlet of the smoke mixing segment 1-2 of the aerosol generating article 1 and enters the consumer's mouth, completing a puffing process. During the interval between puffs, the radiation heat source 2-2 continues to supply heat to the aerosol generating substrate segment 1-1, and the aerosol generating substrate segment 1-1 continuously generates aerosol material, which is transferred to the smoke mixing segment 1-2 during the puffing process and mixed with air to form smoke aerosol. After several repetitions, the power start-stop controller 2-9 is turned off when the program set shutdown condition is met, and the use of the aerosol generating article 1 is ended.

[0120] Figure 5 The fourth embodiment of the heated cigarette smoking set structure is shown. The cross section of the hollow part of the bottom annular cigarette sealing member 2-4 is always circular. The upstream inner diameter of the bottom annular cigarette sealing member 2-4 is smaller than the downstream inner diameter. The inner wall of the bottom annular cigarette sealing member 2-4 is sloped to facilitate the insertion of a cigarette. The ratio of the minimum inner diameter of the bottom annular cigarette sealing member 2-4 or the middle annular cigarette sealing member 2-12 to the diameter or hydraulic diameter of the aerosol generating substrate 1-1 is 85% to 98% to form a snug seal.

[0121] Figure 6The structure diagram of the fifth embodiment of the heated cigarette smoking set. At the most upstream, the cross section of the hollow part of the bottom annular cigarette seal 2-4 is circular. From downstream to upstream, the cross section of the hollow part of the bottom annular cigarette seal 2-4 changes from the initial circular to the final rectangular. The ratio of the area of the initial circular to the area of the cigarette accommodating cavity is 85% to 98%. The area of the initial circular is larger than the cross-sectional area of the heated cigarette smoking segment, so as to facilitate the insertion of the cigarette. The perimeter of the cross section of the hollow part of the bottom annular cigarette seal 2-4 is always the same as the perimeter of the smoking segment or is reduced by not more than 5%, so that the cigarette paper is not wrinkled during the insertion of the aerosol substrate segment 1-1 and the compression of the tobacco. The ratio of the height of the bottom annular cigarette seal 2-4 to the length of the aerosol substrate segment 1-1 is not more than 0.5. Preferably, the height of the bottom annular cigarette seal 2-4 is 0.05 to 0.2 times the length of the aerosol substrate segment. After the heated cigarette is inserted into the bottom annular cigarette seal 1-2, it can not only be fixed. The bottom annular cigarette seal 1-2 can also seal the gap between the aerosol substrate segment 1-1 and the cigarette accommodating cavity 2-1, and change the shape of the upstream end of the aerosol substrate segment 1-1 to increase the tobacco density of the upstream end of the aerosol substrate segment 1-1 and strengthen heat transfer. The middle of the bottom annular cigarette seal 2-4 is a hollow structure, so that the upstream end face of the aerosol substrate segment 1-1 is open to receive heat from the radiant heat source 2-2. At this time, the middle annular cigarette seal 2-12 can be provided or not provided.

[0122] Figure 7 The structure diagram of the sixth embodiment of the heated cigarette smoking set. From upstream to downstream, the inner wall of the cigarette accommodating cavity 2-1 is provided with one or more middle annular cigarette seals 2-12 at intervals. The cross section of the one or more middle annular cigarette seals 2-12 is circular, racetrack-shaped or rectangular. From the upstream to the downstream of the cigarette accommodating cavity, the area of the cross section of the hollow part of the middle annular cigarette seal gradually decreases to facilitate the insertion of the aerosol generating substrate segment 1-1. The perimeter of the cross section of the hollow part at the most downstream is equal to the perimeter of the aerosol substrate segment 1-1, so that the cigarette paper is not wrinkled during the insertion of the aerosol substrate segment 1-1 and the compression of the tobacco. The minimum perimeter of the cross section of the hollow part is reduced by not more than 5% compared with the perimeter of the aerosol substrate segment 1-1.

[0123] Figure 7 Most upstream, the cross section of the middle annular cigarette seal 2-12 is circular. From downstream to upstream, the cross section of the hollow part of the middle annular cigarette seal changes from the initial circular to the final rectangular.

[0124] Of course, in other embodiments, the cross section of the most upstream middle annular cigarette seal 2-12 is circular. From downstream to upstream, the cross section of the hollow part of the middle annular cigarette seal can also change from the initial circular to the final racetrack-shaped.

[0125] Cylindrical rod aerosol substrate segment comparative experiments

[0126] Comparative Example 1 is a conventional cylindrical cigarette rod, which includes a tobacco-filled smoking segment, a hollow support segment, and a filter segment. The outer diameter of the smoking segment is 7.2 mm, and the distance between the upstream and downstream end faces of the smoking segment 1 is 12 mm. At this time, the ratio of the distance between the upstream and downstream end faces of the smoking segment 1 to the outer diameter of the smoking segment is 12 / 7.2 = 1.67.

[0127] Example 1 is a cylindrical cigarette rod having an aspect ratio of 1.2, which differs from Comparative Example 1 only in that the smoking segment 1 is truncated such that the distance between the upstream and downstream end faces of the smoking segment 1 is 8.6 mm. Thus, the ratio of the distance A between the upstream end face 1-5 and the downstream end face 1-7 of the aerosol generating substrate segment to the diameter B of the aerosol generating substrate segment 1-1 is 8.6 / 7.2 = 1.2.

[0128] Example 2 is a cylindrical cigarette rod having an aspect ratio of 1.0, which differs from Comparative Example 1 only in that the smoking segment 1 is truncated such that the distance between the upstream and downstream end faces of the smoking segment 1 is 7.2 mm. Thus, the ratio of the distance A between the upstream end face 1-5 and the downstream end face 1-7 of the aerosol generating substrate segment to the diameter B of the aerosol generating substrate segment 1-1 is 7.2 / 7.2 = 1.0.

[0129] Example 3 is a cylindrical cigarette rod having an aspect ratio of 0.6, which differs from Comparative Example 1 only in that the smoking segment 1 is truncated such that the distance between the upstream and downstream end faces of the smoking segment 1 is 4.3 mm. Thus, the ratio of the distance A between the upstream end face 1-5 and the downstream end face 1-7 of the aerosol generating substrate segment to the diameter B of the aerosol generating substrate segment 1-1 is 4.3 / 7.2 = 0.6.

[0130] Performance test:

[0131] Comparative Example 1 and Examples 1-3 were tested using the same smoking device, and the experimental conditions were as follows: the smoking device was pressed for 2 s, preheated for 25 s, the puffing mode was 55 ml, 30 s, 8 puffs were possible, smoke was trapped for 24 cigarette rods onto one Cambridge filter, the extraction solvent was 25 ml, the equilibrium temperature, and the non-equilibrium humidity. The nicotine content over time is shown in Figures 8-9

[0132] ​The total nicotine content in Comparative Example 1 was about 5.72 mg, the total nicotine content in Example 1 was 4.11 mg, the total nicotine content in Example 2 was 3.43 mg, and the total nicotine content in Example 3 was 2.06 mg. After 8 puffs, the total nicotine release in Comparative Example 1 and Examples 1-3 was 0.82 mg, 1.06 mg, 1.33 mg, and 0.82 mg, respectively, and the nicotine conversion rate was 14.33%, 25.8%, 38.8%, and 39.81%, respectively. This proves that reducing the ratio of the distance A between the upstream end face 1-5 and the downstream end face 1-7 of the cylindrical tobacco aerosol generating substrate segment to the diameter B to within 1.2 can effectively improve the nicotine conversion rate, and can quickly increase the nicotine release rate during the puffing process and maintain a stable release amount thereafter.

[0133] Comparative Experiment of Cylindrical Granular Aerosol Generating Substrate Segment

[0134] Comparative Example 2 was a cylindrical conventional cigarette, which included a blocking member, a smoking segment filled with smoking granules, a granule isolation member, a hollow support segment, and a filter segment. The outer diameter of the smoking segment was 7.2 mm, and the distance between the upstream and downstream end faces of the smoking segment 1 was 12 mm. At this time, the ratio of the distance between the upstream and downstream end faces of the smoking segment 1 to the outer diameter of the smoking segment was 12 / 7.2 = 1.67.

[0135] Example 4 was a cigarette with a length-diameter ratio of 1.2, which differed from Comparative Example 1 only in that the granular aerosol generating substrate filling amount of the smoking segment 1 was reduced, and the distance between the upstream and downstream end faces of the smoking segment 1 was 8.6 mm. Of course, the overall length of the cigarette was also shortened at this time. Therefore, the ratio of the distance A between the upstream end face 1-5 and the downstream end face 1-7 of the aerosol generating substrate segment to the diameter B of the aerosol generating substrate segment 1-1 was 8.6 / 7.2 = 1.2.

[0136] Example 5 was a cigarette with a length-diameter ratio of 1.0, which differed from Comparative Example 1 only in that the granular aerosol generating substrate filling amount of the smoking segment 1 was reduced, so that the distance between the upstream and downstream end faces of the smoking segment 1 was 7.2 mm. Of course, the overall length of the cigarette was also shortened at this time. Therefore, the ratio of the distance A between the upstream end face 1-5 and the downstream end face 1-7 of the aerosol generating substrate segment to the diameter B of the aerosol generating substrate segment 1-1 was 7.2 / 7.2 = 1.0.

[0137] Example 6 was a cigarette with a length-diameter ratio of 0.6, which differed from Comparative Example 1 only in that the granular aerosol generating substrate filling amount of the smoking segment 1 was reduced, so that the distance between the upstream and downstream end faces of the smoking segment 1 was 4.3 mm. Of course, the overall length of the cigarette was also shortened at this time. Therefore, the ratio of the distance A between the upstream end face 1-5 and the downstream end face 1-7 of the aerosol generating substrate segment to the diameter B of the aerosol generating substrate segment 1-1 was 4.3 / 7.2 = 0.6.

[0138] Performance Test:

[0139] The cigarettes of Comparative Example 2 and Examples 4-6 were tested using the same smoking machine, under the following experimental conditions: machine press 2 s, preheat 25 s, puff mode 55 ml, 30 s, 8 puffs, smoke trapping 24 cigarettes trapped on one Cambridge filter, 25 ml of extractant, equilibrium temperature, non-equilibrium humidity. The nicotine content over time is shown in Figures 10-11

[0140] The total nicotine content of Comparative Example 2 was about 7.18 mg, the total nicotine content of Example 4 was 5.16 mg, the total nicotine content of Example 5 was 4.3 mg, and the total nicotine content of Example 6 was 2.58 mg. The total nicotine release amount after 8 puffs of Comparative Example 2 and Examples 4-6 was 0.83 mg, 0.92 mg, 0.96 mg, and 0.69 mg, respectively, and the nicotine conversion rate was 11.56%, 17.83%, 22.32%, and 26.74%. This proves that reducing the ratio of the distance A between the upstream end face 1-5 and the downstream end face 1-7 of the cylindrical tobacco rod aerosol generating substrate segment to the diameter B can effectively improve the nicotine conversion rate, and can quickly increase the nicotine release rate during the puffing process and maintain a stable release amount thereafter.

[0141] Rectangular prism tobacco rod aerosol generating substrate comparison experiment:

[0142] Comparative Example 3 was a rectangular prism cigarette, which included a tobacco-filled smoking segment, a hollow support segment, and a filter segment. The smoking segment was a rectangular prism, and the upstream and downstream surfaces of the smoking segment were square. The side length of the square was 7.2 mm, and the distance between the upstream and downstream end faces of the smoking segment 1 was 12 mm. At this time, the hydraulic diameter of the smoking segment was 7.2 mm. The ratio of the distance between the upstream and downstream end faces of the smoking segment 1 to the hydraulic diameter of the smoking segment was 12 / 7.2 = 1.67.

[0143] Example 7 was a cigarette with an aspect ratio of 1.2, which differed from Comparative Example 1 only in that the smoking segment 1 was truncated, such that the distance between the upstream and downstream end faces of the smoking segment 1 was 8.6 mm. Therefore, the ratio of the distance A between the upstream end face 1-5 and the downstream end face 1-7 of the aerosol generating substrate segment to the hydraulic diameter B of the aerosol generating substrate segment 1-1 was 8.6 / 7.2 = 1.2.

[0144] Example 8 was a cigarette with an aspect ratio of 1.0, which differed from Comparative Example 1 only in that the smoking segment 1 was truncated, such that the distance between the upstream and downstream end faces of the smoking segment 1 was 7.2 mm. Therefore, the ratio of the distance A between the upstream end face 1-5 and the downstream end face 1-7 of the aerosol generating substrate segment to the hydraulic diameter B of the aerosol generating substrate segment 1-1 was 7.2 / 7.2 = 1.0.

[0145] ​Example 9 is a cigarette with an aspect ratio of 0.6, which differs from Comparative Example 1 only in that the smoking segment 1 is truncated such that the distance between the upstream and downstream end faces of the smoking segment 1 is 4.3 mm. Thus, the ratio of the distance A between the upstream end face 1-5 and the downstream end face 1-7 of the aerosol generating substrate segment and the hydraulic diameter B of the aerosol generating substrate segment 1-1 is 4.3 / 7.2 = 0.6.

[0146] Performance test:

[0147] Comparative Example 3 and Examples 7-9 were tested using the same smoking machine, under the following experimental conditions: 2 s of machine pressing, 25 s of preheating, 55 ml of puff mode, 30 s, 8 puffs, smoke trapping of 24 cigarettes onto one Cambridge filter, 25 ml of extractant, equilibrium temperature, and non-equilibrium humidity. The nicotine content over time is shown in Figures 12-13

[0148] The total nicotine content in Comparative Example 3 was about 6.47 mg, the total nicotine content in Example 7 was 4.65 mg, the total nicotine content in Example 8 was 3.87 mg, and the total nicotine content in Example 9 was 2.32 mg. The total nicotine release amount in 8 puffs in Comparative Example 3 and Examples 7-9 was 0.84 mg, 0.94 mg, 1.02 mg, and 0.77 mg, respectively, and the nicotine conversion rate was 12.98%, 17.42%, 26.36%, and 33.19%, respectively. This demonstrates that reducing the ratio of the distance A between the upstream end face 1-5 and the downstream end face 1-7 of the cylindrical tobacco aerosol generating substrate segment and the diameter B can effectively improve the nicotine conversion rate, while also rapidly increasing the nicotine release rate during puffing and maintaining a stable release amount thereafter.

[0149] Rectangular cuboid particle aerosol substrate comparative experiment:

[0150] Comparative Example 4 is a rectangular cuboid cigarette, which includes a blocking member, a smoking segment filled with smoking particles, a particle isolation member, a hollow support segment, and a filter segment. The smoking segment is a rectangular cuboid, and the upstream and downstream surfaces of the smoking segment are square. The side length of the square is 7.2 mm, and the distance between the upstream and downstream end faces of the smoking segment 1 is 12 mm. At this time, the hydraulic diameter of the smoking segment is 7.2 mm. The ratio of the distance between the upstream and downstream end faces of the smoking segment 1 to the hydraulic diameter of the smoking segment is 12 / 7.2 = 1.67.

[0151] Example 10 is a cigarette with an aspect ratio of 1.2, which differs from Comparative Example 1 only in that the amount of particle aerosol substrate filled in the smoking segment 1 is reduced, such that the distance between the upstream and downstream end faces of the smoking segment 1 is 8.6 mm. Of course, the overall length of the cigarette will also be shorter. Thus, the ratio of the distance A between the upstream end face 1-5 and the downstream end face 1-7 of the aerosol generating substrate segment and the hydraulic diameter B of the aerosol generating substrate segment 1-1 is 8.6 / 7.2 = 1.2. ​

[0152] Example 11 is a cigarette with an aspect ratio of 1.0. The only difference between Example 1 and Comparative Example 1 is that the amount of particulate aerosol matrix filling the smoke-generating section 1 is reduced, resulting in a distance of 7.2 mm between the upstream and downstream end faces of the smoke-generating section 1. Naturally, the overall cigarette length will also be shorter. Therefore, the ratio of the distance A between the upstream end face 1-5 and the downstream end face 1-7 of the aerosol generating matrix section to the hydraulic diameter B of the aerosol generating matrix section 1-1 is 7.2 / 7.2 = 1.0.

[0153] Example 12 is a cigarette with an aspect ratio of 0.6. The only difference between Example 1 and Comparative Example 1 is that the amount of particulate aerosol matrix filling in the smoke-generating section 1 is reduced, resulting in a distance of 4.3 mm between the upstream and downstream end faces of the smoke-generating section 1. Naturally, the overall cigarette length is also shorter. Therefore, the ratio of the distance A between the upstream end face 1-5 and the downstream end face 1-7 of the aerosol generating matrix section to the hydraulic diameter B of the aerosol generating matrix section 1-1 is 0.6.

[0154] Performance testing:

[0155] The cigarettes from Comparative Example 4 and Examples 10-12 were tested using the same smoking device. The experimental conditions were: device pressing for 2 seconds, preheating for 25 seconds, puffing mode of 55ml for 30 seconds, 8 puffs per minute, smoke collection of 24 puffs onto a Cambridge filter, 25ml extractant, balanced temperature, and unbalanced humidity. Nicotine changes over time are shown below. Figures 14-15 As shown.

[0156] In Comparative Example 4, the total nicotine content was approximately 7.18 mg; in Example 10, it was 5.16 mg; in Example 11, it was 4.3 mg; and in Example 12, it was 2.58 mg. After eight puffs, the nicotine release amounts in Comparative Example 4 and Examples 10-12 were 0.81 mg, 0.86 mg, 0.95 mg, and 0.64 mg, respectively, with nicotine conversion rates of 11.28%, 16.67%, 22.09%, and 24.81%. This demonstrates that reducing the ratio of the distance A to the diameter B between the upstream end face 1-5 and the downstream end face 1-7 of the cylindrical tobacco aerosol generation matrix section can effectively improve the nicotine conversion rate, while simultaneously rapidly increasing the nicotine release rate during puffing and maintaining a stable release amount thereafter.

Claims

1. An aerosol-generating system comprising, The aerosol generating system comprises an aerosol generating article and a heat-not-burn smoking set; The aerosol generating article comprises: an aerosol generating substrate segment having an upstream end face and a downstream end face; The aerosol generating substrate segment has a meandering hole penetrating from the upstream end face to the downstream end face; The aerosol generating substrate segment is cylindrical, and a ratio of a distance between the upstream and downstream end faces of the aerosol generating substrate segment to a diameter of the aerosol generating substrate segment is less than 1.2; or the aerosol generating substrate segment is cuboid, and a ratio of a distance between the upstream and downstream end faces of the aerosol generating substrate segment to a hydraulic diameter of the end face is less than 1.2; The heat-not-burn smoking set comprises: a cigarette accommodating cavity, and a radiant heat source located below the cigarette accommodating cavity; The bottom of the cigarette accommodating cavity is provided with a bottom annular cigarette seal, and / or a middle annular cigarette seal is arranged between the bottom of the cigarette accommodating cavity and the top of the cigarette accommodating cavity; The aerosol generating substrate segment of the aerosol generating article is inserted into the cigarette accommodating cavity of the heat-not-burn smoking set; The bottom annular cigarette seal or the middle annular cigarette seal is configured to seal a gap between the heat-not-burn smoking segment and the cigarette accommodating cavity.

2. An aerosol-generating system according to claim 1, wherein, In the aerosol generating substrate segment, a visible light transmittance between the upstream end face and the downstream end face is 5% to 40%.

3. An aerosol-generating system according to claim 1, wherein, The aerosol generating article further comprises: a heat shielding segment located downstream of the aerosol generating substrate segment; The heat shielding segment is configured such that a projection of light rays transmitted from the downstream end face in a downstream axial direction falls on the heat shielding segment; The heat shielding segment is a fiber bundle segment or a light blocking plate; the heat shielding segment has an axial through hole or no axial through hole; When the heat shielding segment has an axial through hole, the heat shielding segment is configured such that the projection of the light rays transmitted from the downstream end face in the downstream axial direction falls on a non-axial through hole position of the heat shielding segment.

4. An aerosol-generating system according to claim 3, wherein, The aerosol generating article further comprises: a smoke mixing segment; the smoke mixing segment has a hollow structure therein; The smoke mixing segment is located between the aerosol generating substrate segment and the heat shielding segment; or the smoke mixing segment is located downstream of the heat shielding segment.

5. An aerosol-generating system according to claim 4, wherein, The aerosol generating article comprises: a light reflecting layer wrapped around the periphery of the aerosol generating substrate segment.

6. An aerosol-generating system according to claim 1, wherein, From downstream to upstream, a cross-sectional area of a hollow portion of the bottom annular cigarette seal or the middle annular cigarette seal gradually decreases.

7. An aerosol-generating system according to claim 6, wherein, From downstream to upstream, a cross-sectional perimeter of the hollow portion of the bottom annular cigarette seal or the middle annular cigarette seal remains unchanged, and the cross-sectional perimeter is equal to a cross-sectional perimeter of the heat-not-burn smoking segment; Or, from downstream to upstream, a 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 a cross-sectional perimeter of the hollow portion of the bottom annular cigarette seal or the middle annular cigarette seal at the most downstream is equal to the cross-sectional perimeter of the heat-not-burn smoking segment.

8. An aerosol-generating system according to claim 6, wherein, From downstream to upstream, the cross section of the hollow part of the bottom annular cigarette seal or middle annular cigarette seal changes from an initial circle to an oblong, an ellipse, a racetrack shape or a smaller circle; The inner wall of the bottom annular cigarette seal is in a slope shape; The downstream end surface of the bottom annular cigarette seal is connected to the downstream end surface of the cigarette accommodating cavity through a slope; The downstream end surface of the most downstream middle annular cigarette seal is connected to the downstream end surface of the cigarette accommodating cavity through a slope.

9. An aerosol-generating system according to claim 1, wherein, The heated cigarette holder comprises a light-reflecting layer on the periphery of the cigarette accommodating cavity; The radiant heat source is spaced apart from or directly contacts the upstream end surface of the heated cigarette.

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