Aerosol-generating device, aerosol-generating system, and heating method for aerosol generation

Abstract

The invention relates to the technical field of aerosol generation, and discloses an aerosol generation device, an aerosol generation system and an aerosol generation heating method.The device comprises a shell, a heating mechanism and an accelerant, and a cavity used for containing an aerosol generation matrix and the accelerant is formed in the shell; the heating mechanism is installed in the shell and used for heating the aerosol generating substrate and the accelerant in the cavity, the accelerant makes contact with the aerosol generating substrate in the heating process, and the accelerant is used for accelerating evaporation of cell moisture in the aerosol generating substrate; the accelerant is in contact with the aerosol generating matrix in the heating process, evaporation of cell moisture in the aerosol generating matrix is accelerated, the moisture is discharged in the preheating stage, the heat capacity of the aerosol is reduced, the release amount of high-temperature water vapor in the aerosol is low when a user smokes the aerosol, and therefore the mouth scalding feeling of the user when the user smokes the first mouth is relieved, and the user experience is improved. And the user experience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tobacco aerosol generation, and in particular to an aerosol generation device, a generation system and a heating method for aerosol generation. Background Art

[0002] Heated cigarettes are a new strategic product in the tobacco industry. Existing cigarette heating devices are mainly divided into central heating and circumferential heating. When using existing cigarette heating devices, the tobacco is first preheated for a certain period of time to generate aerosol. After the preheating is completed, the user can inhale and use it.

[0003] However, no matter which heating method is used, the tobacco close to the heater tends to absorb heat quickly, causing the free water absorbed by the aerosol-generating matrix in the tobacco and the pyrolysis water produced after pyrolysis to accumulate, resulting in a large release of high-temperature water vapor in the aerosol when the user inhales, especially the first puff. The user will feel a burning mouth, resulting in a poor user experience. Summary of the invention

[0004] The purpose of the present invention is to overcome the problem in the prior art that moisture accumulates in the aerosol-generating matrix in tobacco after heating, causing the user to feel hot in the mouth when inhaling, and to provide an aerosol generating device, a generating system and a heating method for aerosol generation.

[0005] In order to achieve the above-mentioned objectives, in a first aspect, the present invention provides an aerosol generating device, comprising a shell, a heating mechanism and a promoter, wherein the shell is provided with a chamber for accommodating an aerosol generating matrix and the promoter, and the heating mechanism is installed in the shell for heating the aerosol generating matrix and the promoter in the chamber, and during the heating process, the promoter contacts the aerosol generating matrix and is used to accelerate the evaporation of cell moisture in the aerosol generating matrix.

[0006] In some embodiments, the accelerator includes at least one of a cellulose pyrolysis catalyst, a hemicellulose pyrolysis catalyst, and a pectin pyrolysis catalyst;

[0007] Preferably, the promoter comprises a molecular sieve and a metal compound, the mass ratio of the molecular sieve to the metal compound is 1:(0.5-3), and the metal compound comprises a metal oxide and / or a metal salt;

[0008] Preferably, the molecular sieve is a Y-type molecular sieve;

[0009] Preferably, the metal salt is a metal chloride salt;

[0010] Preferably, the metal compound is a metal oxide or a metal chloride;

[0011] Preferably, the mass ratio of the metal oxide to the metal chloride is 1:(0.6-1.2);

[0012] Preferably, the metal oxide is magnesium oxide and / or aluminum oxide, and the metal salt is sodium chloride and / or calcium chloride.

[0013] In some embodiments, the aerosol generating device further comprises a substrate, the substrate is disposed in the chamber and fixedly connected to the housing, and the accelerant is fixedly disposed on the outer surface of the substrate;

[0014] Preferably, the base and the shell are detachably connected;

[0015] Preferably, the promoter is distributed on the outer surface of the substrate in a granular, strip or mesh manner; wherein, when the promoter is distributed on the outer surface of the substrate in a granular manner, the D50 particle size range of the promoter is 300nm to 500nm, and the density of the promoter on the outer surface of the substrate is 2.5g / m 2 ~4.0g / m 2 ;

[0016] Preferably, the base material is made of stainless steel, stainless iron, aluminum, titanium or ceramic.

[0017] In some embodiments, the base and the shell are detachably connected, and a breathable stop portion is provided on the base, and a cross section of the breathable stop portion is adapted to a cross section of the chamber.

[0018] In some embodiments, one end of the base is used for fixed connection with the shell, and the other end of the base has a sharp portion.

[0019] In some embodiments, a defect structure is provided on the surface of the substrate, and the promoter is fixed at the defect structure on the surface of the substrate;

[0020] Alternatively, the promoter in the form of particles is bonded to the surface of the substrate by an adhesive.

[0021] In some embodiments, the heating mechanism includes a power supply, a main control circuit and at least one heating body, wherein the heating body is disposed in the chamber, and the power supply provides an electric driving force and controls the heating body to generate heat through the main control circuit;

[0022] Preferably, when a substrate is arranged in the chamber, the heating body is in thermal contact with the substrate.

[0023] In some embodiments, the heating body is in thermal contact with the base body, and the base body is provided with an inner cavity for accommodating the heating body.

[0024] In a second aspect, the present invention provides an aerosol generating system comprising an aerosol generating substrate and an aerosol generating device as described above.

[0025] In a third aspect, the present invention provides a heating method for aerosol generation using the aerosol generation system as described above, the heating method is used to heat a natural plant aerosol generation matrix to generate an aerosol, the natural plant aerosol generation matrix has a free water evaporation interval, a cell water evaporation interval and a pyrolysis water evaporation interval, the free water evaporation interval, the cell water evaporation interval and the pyrolysis water evaporation interval do not overlap, the temperature of the free water evaporation interval is lower than the temperature of the cell water evaporation interval, and the temperature of the pyrolysis water evaporation interval is higher than the temperature of the cell water evaporation interval;

[0026] The heating method comprises the following steps:

[0027] Exhaust step S1: heating the aerosol generating substrate to a first heating temperature TEMP1, and the heating process is maintained for a first continuous heating time t1, wherein the first heating temperature TEMP1 is within the free water evaporation interval or the cell water evaporation interval of the aerosol generating substrate, the free water evaporation interval is 100° C. to 140° C., and the cell water evaporation interval is 140° C. to 180° C.;

[0028] When the first heating temperature TEMP1 is within the free moisture evaporation interval, the first heating temperature TEMP1 satisfies: 100°C≤TEMP1≤110°C or 110°C≤TEMP1≤125°C or 125°C≤TEMP1≤140°C; the first continuous heating time t1 satisfies: 2s≤t1≤3s or 3s≤t1≤4s or 4s≤t1≤6s or 6s≤t1≤8s or 8s≤t1≤10s;

[0029] In the free water evaporation range, the water evaporation peak value A(Ta n ) and the water evaporation peak value A(Ta) of the natural plant raw material in the absence of the promoter 0 ) satisfies: A(Ta n )≥A(Ta 0 )×110%; where a n Indicates the peak point of the ion flux intensity of the natural plant raw material in the free water evaporation range in the presence of the promoter, a 0 It represents the peak point of the ion flux intensity of the natural plant raw material in the free water evaporation range in the absence of a promoter, Ta n Indicates the peak point a n The corresponding temperature, Ta 0 Indicates the peak point a 0 The corresponding temperature, A(Ta n ) represents the peak point an The corresponding ion current intensity, A(Ta 0 ) represents the peak point a 0 The corresponding ion current intensity;

[0030] When the first heating temperature TEMP1 is within the cell water evaporation range, the first heating temperature TEMP1 satisfies: 140°C < TEMP1 ≤ 150°C or 150°C ≤ TEMP1 ≤ 165°C or 165°C ≤ TEMP1 ≤ 180°C, and the first continuous heating time t1 satisfies: 4s ≤ t1 ≤ 6s or 6s ≤ t1 ≤ 8s or 8s ≤ t1 ≤ 10s or 10s ≤ t1 ≤ 12s or 12s ≤ t1 < 15s;

[0031] Within the cell water evaporation range, in the presence of a promoter, the water evaporation peak A(Tc n ) of cellulose and the water evaporation peak A(Tc 0 ) of the cellulose in the absence of a promoter satisfy: A(Tc n ) ≥ A(Tc 0 ) × 150%; where c n represents the peak point of the ion current intensity of the cellulose in the presence of a promoter within the cell water evaporation range, c 0 represents the peak point of the ion current intensity of the cellulose in the absence of a promoter within the cell water evaporation range, Tc n represents the temperature corresponding to the peak point c n Tc represents the temperature corresponding to the peak point c 0 represents the temperature corresponding to the peak point c 0 A(Tc n ) represents the ion current intensity corresponding to the peak point c n A(Tc 0 ) represents the ion current intensity corresponding to the peak point c 0 The corresponding ion current intensity;

[0032] Preheating step S2: Heating the aerosol - generating substrate to the second heating temperature TEMP2, maintaining the second continuous heating time t2 during the heating process, and the second heating temperature TEMP2 is within the pyrolysis water evaporation range of the aerosol - generating substrate, and the pyrolysis water evaporation range is 290°C to 340°C;

[0033] The second heating temperature TEMP2 satisfies: 290°C < TEMP2 ≤ 300°C or 300°C < TEMP2 ≤ 320°C or 320°C < TEMP2 ≤ 340°C, and the first continuous heating time t1 and the second continuous heating time t2 satisfy: t1 + t2 ≤ 15s or t1 + t2 ≤ 18s or t1 + t2 ≤ 20s or t1 + t2 ≤ 23s or t1 + t2 ≤ 25s or t1 + t2 ≤ 28s or t1 + t2 ≤ 30s;

[0034] In the pyrolysis water evaporation range, the water evaporation peak value A(Te n ) and the water evaporation peak value A(Te 0 ) satisfies: A(Te n )≤A(Te 0 )×90%; where e n Indicates the peak point of the ion flux intensity of the cellulose in the pyrolysis water evaporation range in the presence of the promoter, e 0 In the absence of a promoter, Te represents the peak point of the ion flux intensity of the cellulose in the pyrolysis water evaporation range. n Indicates the peak point e n The corresponding temperature, Te 0 Indicates the peak point e 0 The corresponding temperature, A(Te n ) represents the peak point e n The corresponding ion current intensity, A(Te 0 ) represents the peak point e 0 The corresponding ion current intensity;

[0035] Heating step S3: heating the aerosol generating substrate to a third heating temperature TEMP3, the heating process is maintained for a third continuous heating time t3, the third heating temperature TEMP3 is within the pyrolysis water evaporation range of the aerosol generating substrate, and the third heating temperature TEMP3 is lower than the second heating temperature TEMP2;

[0036] In the steam exhaust step S1, the water vapor release amount of the aerosol generating substrate is detected. After heating to the first heating temperature TEMP1, if the water vapor release amount is detected to be lower than the preset water vapor release amount threshold, the preheating step S2 is performed, otherwise, the heating time reaches the first continuous heating time t1;

[0037] In the preheating step S2, the water vapor release amount of the aerosol generating substrate is detected. After heating to the second heating temperature TEMP2, if the water vapor release amount is detected to be lower than the preset water vapor release amount threshold, a notification signal is issued, otherwise, until the heating time reaches the second continuous heating time t2;

[0038] The device for detecting the amount of water vapor released includes a water vapor sensor and / or a temperature sensor. The temperature sensor detects the temperature of the aerosol generating substrate. If the temperature exceeds a temperature threshold, it is determined that the amount of water vapor released is lower than the threshold of the amount of water vapor released.

[0039] An aerosol generating device using the above technical solution of the present invention has the following effects:

[0040] A promoter is arranged in the aerosol generating device so that the promoter contacts the aerosol generating matrix during the heating process, thereby accelerating the evaporation of cellular water in the aerosol generating matrix, so that the water is discharged in the preheating stage, reducing the heat capacity of the aerosol, and reducing the release amount of high-temperature water vapor in the aerosol when the user inhales, thereby alleviating the burning mouth feeling of the user when taking the first puff and improving the user experience.

[0041] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural schematic diagram of a first embodiment of an aerosol generating device of the present invention;

[0043] Figure 2 It is a structural schematic diagram of a second embodiment of an aerosol generating device of the present invention;

[0044] Figure 3 is a structural schematic diagram of a third embodiment of an aerosol generating device of the present invention;

[0045] Figure 4 is a schematic diagram of the three-dimensional structure of the substrate in the third embodiment of the aerosol generating device;

[0046] Figure 5 is a schematic diagram of the cross-section structure of the aerosol generating device after the base body and the heating body are connected in the third embodiment;

[0047] Figure 6 is a structural schematic diagram of a fourth embodiment of an aerosol generating device of the present invention;

[0048] Figure 7 It is a structural schematic diagram of a third embodiment of an aerosol generating system using an aerosol generating device according to the present invention;

[0049] Figure 8 yes Figure 7 Explosion diagram of

[0050] Fig. 9 It is a structural schematic diagram of Embodiment 1 of an aerosol generating system using an aerosol generating device of the present invention;

[0051] Fig.10 It is a structural schematic diagram of a fourth embodiment of an aerosol generating system using an aerosol generating device according to the present invention;

[0052] Fig.11 It is a schematic diagram of a heating temperature curve of an aerosol generation method of the present invention;

[0053] Fig.12It is the ion flux intensity-temperature curve of cellulose mixed with different accelerators at 40-390°C;

[0054] Fig.13 It is the ion flux intensity-temperature curve of flue-cured tobacco mixed with different accelerators at 40-390℃;

[0055] Fig.14 It is the ion flux intensity-temperature curve of burley tobacco mixed with different accelerators at 40-390°C;

[0056] Fig.15 It is an ion flux intensity-temperature curve of reconstituted tobacco leaves mixed with different accelerators at a temperature of 40 to 390°C.

[0057] Description of Reference Numerals

[0058] 100, aerosol generating matrix; 200, aerosol generating product; 210, supporting structure; 220, connecting structure; 230, filtering structure; 300, aerosol generating device; 310, shell; 311, chamber; 320, heating mechanism; 321, power supply; 322, heating body; 330, promoter; 340, base; 341, breathable stopper; 342, sharp part; 343, inner cavity. DETAILED DESCRIPTION

[0059] The specific embodiments of the present invention are described in detail below. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0060] In the present invention, unless otherwise stated, the directional words such as "upper" and "lower" usually refer to the orientation in the assembled state. "Inside" and "outside" refer to the inside and outside relative to the outline of each component itself.

[0061] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0062] In a first aspect, the present invention provides an aerosol generating device 300, comprising a housing 310, a heating mechanism 320, and a promoter 330. The housing 310 is provided with a chamber 311 for accommodating an aerosol generating substrate 100 and a promoter 330, and the heating mechanism 320 is installed in the housing 310 for heating the aerosol generating substrate 100 and the promoter 330 in the chamber 311 to generate an aerosol. The chamber 311 has the function of providing a place for accommodating the aerosol generating substrate 100 and the promoter 330, and can also play a certain role in guiding the generated aerosol.

[0063] During the heating process, the promoter 330 contacts the aerosol generating substrate 100 and the promoter 330 is used to accelerate the evaporation of cell water in the aerosol generating substrate 100. The amount of high-temperature water vapor released in the aerosol increases first and then decreases with the heating time, and the effect of the promoter 330 makes the amount of high-temperature water vapor released in the aerosol reach the peak in advance. In some embodiments of the present invention, the chamber 311 is opened upward and arranged in the housing 310, so that the generated aerosol can be discharged upward from the chamber 311. In addition, the chamber 311 opened upward is also convenient for taking and placing the aerosol generating substrate 100 and the promoter 330. Before heating to generate aerosol, the aerosol generating substrate 100 and the promoter 330 are mixed outside the chamber 311 and then filled into the chamber 311, or the aerosol generating substrate 100 and the promoter 330 are filled into the chamber 311 and then mixed evenly. After use, the aerosol generating substrate 100 and the promoter 330 are taken out of the chamber 311 together.

[0064] For cigarette heating devices, tobacco as an aerosol generating matrix 100 will be heated for a period of time during use, and the amount of high-temperature water vapor released in the aerosol will increase first and then decrease with the heating time. After the heating is completed, the user can inhale and use it. Generally, the amount of high-temperature water vapor released in the aerosol has not reached its peak when the user inhales. At this time, the amount of high-temperature water vapor released in the aerosol is large and in an ascending stage, which makes the user feel hot when inhaling, especially the first puff, or even the second puff, which reduces the user experience. If the heating time is extended, so that the amount of high-temperature water vapor released in the aerosol has passed the peak and is in a descending stage when the user inhales, the time for the user to wait for inhalation will be extended, which will also reduce the user experience.

[0065] In the present invention, the promoter 330 accelerates the rapid evaporation of cell water in the tobacco. After the heating is completed, the release of high-temperature water vapor in the aerosol has reached its peak, so that the user's high-temperature water vapor release is lower when inhaling, reducing the feeling of burning the mouth, and there is no need to extend the user's waiting time, thereby improving the user experience.

[0066] In some embodiments of the present invention, the aerosol generating device 300 further includes a substrate 340, which is disposed in the chamber 311 and fixedly connected to the housing 310, and the promoter 330 is fixedly disposed on the outer surface of the substrate 340. The promoter 330 is fixed on the outer surface of the substrate 340. Before heating to generate aerosol, it is not necessary to mix the aerosol generating substrate 100 and the promoter 330, and it is only necessary to place the aerosol generating substrate 100 in the chamber 311. In addition, when the aerosol generating substrate 100 is taken out of the chamber 311 after use, the promoter 330 is prevented from being taken out together with the aerosol generating substrate 100, so that the promoter 330 can be reused, thereby reducing the consumption and cost of the promoter 330.

[0067] In some preferred embodiments, the substrate 340 is detachably connected to the housing 310. After the promoter 330 is reused several times, the substrate 340 is removed from the housing 310 to facilitate replacement of the promoter 330 on the substrate 340 or directly replace the entire substrate 340 together with the promoter 330 to ensure the catalytic effect of the promoter 330. Specifically, the substrate 340 and the housing 310 can be detachably connected by magnetic attraction, thread or buckle.

[0068] In some preferred embodiments, the base 340 is detachably connected to the housing 310, and the base 340 is provided with a breathable stopper 341, the cross section of which matches the cross section of the chamber 311. The breathable stopper 341 can be integrally formed with the base 340, or can be fixed to the base 340 by bonding or welding using acetate fiber, porous breathable paper, or a porous metal plate. The porous structure of the breathable stopper 341 can ensure the breathability effect on the one hand; on the other hand, after the aerosol generating substrate 100 is removed from the chamber 311, part of the aerosol generating substrate 100 may remain in the chamber 311. When the base 340 is removed from the housing 310 and taken out from the chamber 311, the breathable stopper 341 can take out the aerosol generating substrate 100 remaining in the chamber 311.

[0069] In some embodiments of the present invention, one end of the substrate 340 is used to be fixedly connected to the housing 310, and the other end of the substrate 340 has a sharp portion 342. The sharp portion 342 makes the substrate 340 as a whole needle-shaped or sword-shaped, so that the substrate 340 can be inserted into the aerosol generating matrix 100.

[0070] In some embodiments of the present invention, for the promoter 330 and the substrate 340, the promoter 330 is distributed in a granular, strip, or mesh manner on the outer surface of the substrate 340. The substrate 340 can be made of stainless steel, stainless iron, aluminum, titanium, or ceramic, wherein the aluminum includes pure aluminum and aluminum alloy materials, and the titanium includes pure titanium and titanium alloy materials.

[0071] In some preferred embodiments, the surface of the substrate 340 is provided with a defect structure, and the promoter 330 is fixed at the defect structure on the surface of the substrate 340. When the promoter 330 is distributed in a granular manner on the outer surface of the substrate 340, the D50 particle size of the promoter 330 (referring to the particle size corresponding to when the cumulative particle size distribution percentage of a sample reaches 50%) is in the range of 300 mm to 500 mm. In some embodiments, the promoter 330 in the form of particles can also be bonded to the surface of the substrate 340 by an adhesive. In addition, the density of the promoter 330 on the outer surface of the substrate 340 is 2.5 g / m 2 ~4.0g / m 2 .

[0072] In some embodiments of the present invention, the heating mechanism 320 includes a power supply 321, a main control circuit (not shown) and at least one heating body 322. The heating body 322 is disposed in the chamber 311 and can be in contact with the aerosol generating substrate 100 and the promotor 330. The power supply 321 provides an electric driving force and controls the heating body 322 to generate heat through the main control circuit, thereby heating the aerosol generating substrate 100 and the promotor 330 to generate an aerosol.

[0073] In some preferred embodiments, when the substrate 340 is disposed in the chamber 311, the heating body 322 is in thermal contact with the substrate 340. Preferably, an inner cavity 343 for accommodating the heating body 322 is provided in the substrate 340. It should be noted that the heating body 322 is often a resistance coil, and a certain current will flow on the heating body 322. Therefore, in this embodiment, there should be a certain interval between the heating body 322 and the substrate 340 or they should be electrically insulated from each other, that is, the heating body 322 is located in the inner cavity 343 and is not in direct contact with the substrate 340.

[0074] The heating mechanism 320 in this embodiment heats the aerosol generating matrix 100 and the promoter 330 by means of resistance heating. In other embodiments, the heating mechanism 320 may also heat the aerosol generating matrix 100 and the promoter 330 by means of electromagnetic induction heating, infrared heating, air heating, etc.

[0075] In some embodiments of the present invention, the promoter 330 includes at least one of a cellulose pyrolysis catalyst, a hemicellulose pyrolysis catalyst, and a pectin pyrolysis catalyst. Specifically, the promoter 330 includes a molecular sieve and a metal compound, the mass ratio of the molecular sieve to the metal compound is 1:(0.5-3), and the metal compound includes a metal oxide and / or a metal salt.

[0076] As for the molecular sieve, Y-type molecular sieve is preferred.

[0077] For the metal compound, the metal salt is preferably a metal chloride. In other embodiments, the metal compound is preferably a metal oxide and a metal chloride. Among them, the preferred mass ratio of the metal oxide to the metal chloride is 1:(0.6-1.2). The metal oxide is preferably magnesium oxide and / or aluminum oxide, and the metal salt is sodium chloride and / or calcium chloride.

[0078] For the promoter 330 and the substrate 340, the promoter 330 can be fixed to the outer surface of the substrate 340 by a thin film deposition process. The thin film deposition process is mainly divided into two categories: chemical vapor deposition and physical vapor deposition. Chemical vapor deposition is a chemical technology that mainly uses one or more gaseous compounds or single substances containing thin film elements to chemically react on the surface of the substrate to form a thin film. Physical vapor deposition (PVD) technology refers to the technology of using physical methods to vaporize the surface of the material source (solid or liquid) into gaseous atoms, molecules or partially ionized into ions under vacuum conditions, and deposit a thin film with a certain special function on the surface of the substrate 340 through a low-pressure gas (or plasma) process. The principle of physical vapor deposition can be roughly divided into sputtering coating, vacuum evaporation, electron beam evaporation, arc ion plating, etc. Magnetron sputtering is a common physical vapor deposition (PVD) process and is the main thin film deposition method for manufacturing small electronic components. Magnetron sputtering has the advantages of fast deposition speed, high film quality, low equipment cost, relatively simple preparation process and wide application scenarios.

[0079] Specifically, the present invention provides the following three preparation examples for fixing the accelerator 330 and the substrate 340 .

[0080] Preparation Example 1:

[0081] Step a1: Making a ceramic substrate 340. Take a long straight iron wire with a diameter of 2 mm and make an insulating green tape (selected from ESL41110-T of ESL Company of the United States) into a rod-shaped green embryo with a length of 20 mm and a diameter of 2.4 mm. Remove the rod-shaped green embryo from the iron wire to form a hollow tubular green embryo. The hollow tubular green embryo can directly form an inner cavity 343 on the substrate 340. Use the same insulating green tape as above to form a solid cone with a height of 2.5 mm at one end of the hollow tubular green embryo as a sharp portion 342. After standing for 10 minutes, a dry green rod is obtained. The green rod is fired at a high temperature, and the temperature can be controlled at 1200-1600°C for at least 30 minutes until it is fired and hardened to form a fixed shape; thereby obtaining a rod-shaped substrate 340.

[0082] Step a2: The surface of the rod-shaped substrate 340 is treated by pickling and etching. The rod-shaped substrate 340 is cleaned in a weakly acidic solution with a pH value of 5-6 to remove surface impurities such as oil and ash, and then immersed in a 40% concentration hydrofluoric acid solution for etching after drying. The immersion treatment time is 8-12 minutes, so that a surface defect structure with an uneven micro-pit surface is formed on the surface of the rod-shaped substrate 340, increasing the surface area of ​​the subsequent fixing accelerator 330.

[0083] Step a3: forming an interface connection layer and a accelerator 330 coating on the micro-pitted surface of the rod-shaped substrate 340 by a magnetron sputtering process.

[0084] The magnetron sputtering equipment model MS600C was used. Nickel metal was first deposited on the rod-shaped substrate 340 to prepare the metal-ceramic interface connection layer. The specific sputtering parameters were: sputtering pressure 2.0Pa, sputtering power 2W / cm 2 , target-substrate distance 5cm, back vacuum 2×10 -4 Pa, substrate temperature 500 ° C, sputtering atmosphere argon (flow rate 20sccm), time 10min, sputtering thickness controlled between 10-500nm. Then, an aluminum oxide accelerator 330 coating is deposited on the rod-shaped substrate 340. The specific sputtering parameters are: sputtering pressure 2.0Pa, sputtering power 4W / cm 2 , target-substrate distance 5cm, back vacuum 2×10 -4 Pa, substrate temperature 500°C, sputtering atmosphere oxygen (flow rate 50 sccm), time 60 min, sputtering thickness controlled between 100-2000 nm. In the magnetron sputtering process, there is no need to consider the uniformity of sputtering thickness.

[0085] Preparation Example 2:

[0086] Step b1: Making the ceramic substrate 340. Take a long straight iron wire with a diameter of 2 mm and make an insulating green tape (selected from ESL41110-T of ESL Company of the United States) into a rod-shaped green embryo with a length of 20 mm and a diameter of 2.4 mm. Remove the rod-shaped green embryo from the iron wire to form a hollow tubular green embryo. The hollow tubular green embryo can directly form an inner cavity 343 on the substrate 340. Use the same insulating green tape as above to form a solid cone with a height of 2.5 mm at one end of the hollow tubular green embryo as a sharp portion 342. After standing for 10 minutes, a dry green rod is obtained. The green rod is fired at a high temperature, and the temperature can be controlled at 1200-1600°C for at least 30 minutes until it is fired and hardened to form a fixed shape; thereby obtaining a rod-shaped substrate 340.

[0087] Step b2: laser etching the surface of the rod-shaped substrate 340. The rod-shaped substrate 340 is cleaned in a weakly acidic solution with a pH value of 5-6 to remove surface impurities such as oil and ash. After drying, the rod-shaped substrate 340 is placed on a rotatable fiber laser fixture and fiber laser micro-nano processing is performed. The laser power is adjusted to 20W, the frequency is 30kHz, the scanning speed is 500-2000mm / s, the etching line width is 200μm, and the etching depth is 5-50μm to form a stripe or mesh pattern on the surface of the rod-shaped substrate 340.

[0088] Step b3: Forming a coating of the promoter 330 on the micro-pitted surface of the rod-shaped substrate 340 by magnetron sputtering. Using a magnetron sputtering device of model MS600C, the coating of the aluminum oxide promoter 330 is deposited on the rod-shaped substrate 340. The specific sputtering parameters are: sputtering pressure 2.0Pa, sputtering power 4W / cm 2 , target-substrate distance 5cm, back vacuum 2×10 -4 Pa, substrate temperature 500°C, sputtering atmosphere oxygen (flow rate 50 sccm), time 60 min, sputtering thickness controlled between 100-2000 nm. The uniformity of sputtering thickness does not need to be considered during magnetron sputtering.

[0089] Preparation Example 3:

[0090] Step c1: Making the ceramic substrate 340. Take a long straight iron wire with a diameter of 2 mm and make an insulating green tape (selected from ESL41110-T of ESL Company of the United States) into a rod-shaped green embryo with a length of 20 mm and a diameter of 2.4 mm. Remove the rod-shaped green embryo from the iron wire to form a hollow tubular green embryo. The hollow tubular green embryo can directly form an inner cavity 343 on the substrate 340. Use the same insulating green tape as above to form a solid cone with a height of 2.5 mm at one end of the hollow tubular green embryo as a sharp portion 342. After standing for 10 minutes, a dry green rod is obtained. The green rod is fired at a high temperature, and the temperature can be controlled at 1200-1600°C for at least 30 minutes until it is fired and hardened to form a fixed shape; thereby obtaining a rod-shaped substrate 340.

[0091] Step c2: Coat the surface of the rod-shaped base 340 with an elastic adhesive to form an adhesive layer. The elastic adhesive may be an adhesive such as epoxy resin, silicon resin, polyester resin, etc.

[0092] Step c3: Select molecular sieve ZSM-5 (zeolite molecular sieve) and sprinkle the granular molecular sieve ZSM-5 promoter 330 on the adhesive layer.

[0093] Step c4: curing the adhesive layer using ultraviolet light.

[0094] In summary, the present invention provides the following embodiments of an aerosol generating device 300 .

[0095] Embodiment 1:

[0096] In this embodiment, the aerosol generating device 300 includes a housing 310, a heating mechanism 320 and a accelerant 330 (not shown). The housing 310 is provided with a chamber 311 opening upward. The heating mechanism 320 includes a power supply 321, a main control circuit (not shown) and a heating body 322. Figure 1 As shown, the heating mechanism 320 adopts a resistance heating method, the heating body 322 is installed at the bottom center of the chamber 311, and the promoter 330 can adopt any of the above. Bulk tobacco aerosol generating substrate 100 (not shown) and solid granular promoter 330 are mixed outside the chamber 311 and then filled into the chamber 311. The aerosol generating substrate 100 and the promoter 330 are heated by the heating mechanism 320 to generate aerosol, and the generated aerosol is discharged from the upper side of the chamber 311.

[0097] Embodiment 2:

[0098] As attached Figure 2 As shown, the difference from the first embodiment is that the heating mechanism 320 in this embodiment adopts a coil electromagnetic heating method, and the heating body 322 is a coil arranged around the chamber 311. The coil is powered by the power supply 321 to electromagnetically heat the aerosol generating matrix 100 and the promoter 330 in the chamber 311.

[0099] Embodiment three:

[0100] As attached Figure 3 As shown, this embodiment is based on the first embodiment and provides a substrate 340, the substrate 340 is detachably connected to the bottom of the chamber 311 of the housing 310 through a thread, and the accelerator 330 is fixed to the outer surface of the substrate 340 by any of the above-mentioned thin film deposition processes. Figure 4 , Attachment Figure 5 The upper end of the base 340 has a sharp portion 342, the lower end has a breathable stopper 341, and the base 340 has an inner cavity 343 opening downward. When the base 340 is installed at the bottom of the chamber 311, the inner cavity 343 just accommodates part of the heating body 322. In this embodiment, since the heating body 322 is arranged on the inner side of the base 340, in order to ensure the heating effect on the aerosol generating matrix 100, the base 340 can be made of magnetic stainless iron material.

[0101] Embodiment 4:

[0102] As attached Figure 6As shown, this embodiment is based on the second embodiment and provides a substrate 340, the substrate 340 and the bottom of the chamber 311 of the housing 310 are detachably connected by threads, and the accelerator 330 can be fixed on the outer surface of the substrate 340 by any of the above-mentioned thin film deposition processes. Figure 4 , the upper end of the substrate 340 has a sharp portion 342, and the lower end has a breathable stopper portion 341. In addition, the substrate 340 in this embodiment is different from the substrate 340 in the third embodiment in that the substrate 340 in this embodiment can be made into a solid shape, and there is no need to provide an inner cavity 343. In this embodiment, the heating mechanism 320 is heated by electromagnetic induction heating. Similar to the third embodiment, the material of the substrate 340 can be selected to be made of magnetic stainless iron material, so that during the electromagnetic induction heating process of the heating mechanism 320, the substrate 340 with good magnetic conductivity can heat up first compared with the aerosol generating matrix 100, thereby heating the aerosol generating matrix 100 through the contact between the substrate 340 and the aerosol generating matrix 100, thereby ensuring the heating effect.

[0103] In a second aspect, the present invention provides an aerosol generating system, comprising an aerosol generating substrate 100 and an aerosol generating device 300 of any of the above-mentioned embodiments. The aerosol generating substrate 100 in the cigarette heating device is usually in the form of a cigarette stick, which is convenient to take and put from the chamber 311 of the shell 310, and then equipped with a connecting structure 220, a supporting structure 210 and a filtering structure 230, and the cigarette stick is installed on the connecting structure 220 to form an aerosol generating product 200. The cigarette stick is heated by the aerosol generating device 300 to generate smoke aerosol, and the smoke aerosol passes through the connecting structure 220, the supporting structure 210 and the filtering structure 230 for the user to inhale.

[0104] Specifically, as attached Figure 7 , Attachment Figure 8 As shown, an aerosol generating system disclosed in an embodiment of the present invention adopts the aerosol generating device 300 in the above-mentioned embodiment 3. Fig. 9 The aerosol generating system shown in the figure adopts the aerosol generating device 300 in the above-mentioned embodiment 1. Fig.10The aerosol generating system shown adopts the aerosol generating device of the fourth embodiment described above. The substrate 340 and the shell 310 in the embodiment of the present invention are detachably connected. Before use, one end of the sharp portion 342 of the substrate 340 can be inserted into the cigarette, and then the cigarette is inserted into the chamber 311. During the process of inserting the cigarette into the chamber 311, the substrate 340 is also simultaneously sleeved on the heating body 322, and then the substrate 340 is rotated by rotating the aerosol generating product 200 to drive the substrate 340 to rotate, so that the substrate 340 and the shell 310 are spirally connected, thereby fixing the substrate 340 and the shell 310. Of course, the substrate 340 can also be sleeved on the heating body 322 and rotated to connect the substrate 340 and the shell 310, and then the cigarette in the aerosol generating product 200 is inserted into the chamber 311, so that one end of the sharp portion 342 of the substrate 340 is inserted into the cigarette.

[0105] In a third aspect, the present invention provides a heating method for aerosol generation using the above-mentioned aerosol generation system. The heating method is used to heat a natural plant aerosol generation matrix 100 to generate an aerosol, and the natural plant aerosol generation matrix 100 has a free water evaporation interval, a cell water evaporation interval, and a pyrolysis water evaporation interval, and the free water evaporation interval, the cell water evaporation interval, and the pyrolysis water evaporation interval do not overlap, and the temperature of the free water evaporation interval is lower than the temperature of the cell water evaporation interval, and the temperature of the pyrolysis water evaporation interval is higher than the temperature of the cell water evaporation interval.

[0106] Combined with Fig.11 , the heating method comprises the following steps:

[0107] Exhaust step S1: heat the aerosol generating matrix 100 to a first heating temperature TEMP1, and the heating process maintains a first continuous heating time t1. The first heating temperature TEMP1 is located in the free moisture evaporation range or the cell moisture evaporation range of the aerosol generating matrix 100. The free moisture evaporation range is 100°C to 140°C, and the cell moisture evaporation range is 140°C to 180°C.

[0108] When the first heating temperature TEMP1 is within the free moisture evaporation range, the first heating temperature TEMP1 satisfies: 100℃≤TEMP1≤110℃ or 110℃≤TEMP1≤125℃ or 125℃≤TEMP1≤140℃; the first continuous heating time t1 satisfies: 2s≤t1≤3s or 3s≤t1≤4s or 4s≤t1≤6s or 6s≤t1≤8s or 8s≤t1≤10s.

[0109] In the free water evaporation range, the water evaporation peak value A(Ta n) The peak value of water evaporation A(Ta) of the natural plant raw material in the case where accelerator 330 is absent 0 ) satisfies: A(Ta n ) ≥ A(Ta 0 ) × 110%; where, a n represents the peak point of the ion current intensity of the natural plant raw material in the free water evaporation range in the case where accelerator 330 is present, a 0 represents the peak point of the ion current intensity of the natural plant raw material in the free water evaporation range in the case where accelerator 330 is absent, Ta n represents the temperature corresponding to the peak point a n , Ta 0 represents the temperature corresponding to the peak point a 0 , A(Ta n ) represents the ion current intensity corresponding to the peak point a n , A(Ta 0 ) represents the ion current intensity corresponding to the peak point a 0 .

[0110] When the first heating temperature TEMP1 is within the cell water evaporation range, the first heating temperature TEMP1 satisfies: 140°C < TEMP1 ≤ 150°C or 150°C ≤ TEMP1 ≤ 165°C or 165°C ≤ TEMP1 ≤ 180°C, and the first continuous heating time t1 satisfies: 4s ≤ t1 ≤ 6s or 6s ≤ t1 ≤ 8s or 8s ≤ t1 ≤ 10s or 10s ≤ t1 ≤ 12s or 12s ≤ t1 < 15s.

[0111] As shown in the Fig.12 appendix, within the cell water evaporation range, the peak value of water evaporation A(Tc) of cellulose in the case where accelerator 330 is present n and the peak value of water evaporation A(Tc) of the cellulose in the case where accelerator 330 is absent 0 satisfy: A(Tc n ) ≥ A(Tc 0 ) × 150%; where, c n represents the peak point of the ion current intensity of the cellulose in the cell water evaporation range in the case where accelerator 330 is present, c 0 represents the peak point of the ion current intensity of the cellulose in the cell water evaporation range in the case where accelerator 330 is absent, Tc n represents the temperature corresponding to the peak point c n , Tc 0 represents the temperature corresponding to the peak point c 0 , A(Tc n ) represents the ion current intensity corresponding to the peak point c n , A(Tc 0)Indicates the peak point c 0 The corresponding ion current intensity.

[0112] Preheating step S2: Heat the aerosol generating substrate 100 to a second heating temperature TEMP2, and maintain the second continuous heating time t2 during the heating process. The second heating temperature TEMP2 is within the pyrolysis moisture evaporation range of the aerosol generating substrate 100, and the pyrolysis moisture evaporation range is 290°C to 340°C.

[0113] The second heating temperature TEMP2 satisfies: 290°C < TEMP2 ≤ 300°C or 300°C < TEMP2 ≤ 320°C or 320°C < TEMP2 ≤ 340°C, and the first continuous heating time t1 and the second continuous heating time t2 satisfy: t1 + t2 ≤ 15s or t1 + t2 ≤ 18s or t1 + t2 ≤ 20s or t1 + t2 ≤ 23s or t1 + t2 ≤ 25s or t1 + t2 ≤ 28s or t1 + t2 ≤ 30s.

[0114] As shown in the appendix Fig.12 During the pyrolysis moisture evaporation range, in the presence of the promoter 330, the moisture evaporation peak A(Te n ) of cellulose and the moisture evaporation peak A(Te 0 ) of cellulose in the absence of the promoter 330 satisfy: A(Te n ) ≤ A(Te 0 ) × 90%; where e n represents the peak point of the ion current intensity of the cellulose in the presence of the promoter 330 within the pyrolysis moisture evaporation range, e 0 represents the peak point of the ion current intensity of the cellulose in the absence of the promoter 330 within the pyrolysis moisture evaporation range, Te n represents the temperature corresponding to the peak point e n Te 0 represents the temperature corresponding to the peak point e 0 A(Te n ) represents the ion current intensity corresponding to the peak point e n A(Te 0 ) represents the ion current intensity corresponding to the peak point e 0 The corresponding ion current intensity.

[0115] Heating step S3: Heat the aerosol generating substrate 100 to a third heating temperature TEMP3, and maintain the third continuous heating time t3 during the heating process. The third heating temperature TEMP3 is within the pyrolysis moisture evaporation range of the aerosol generating substrate 100, and the third heating temperature TEMP3 is lower than the second heating temperature TEMP2.

[0116] In which, in the exhaust step S1, the water vapor release amount of the aerosol generating matrix 100 is detected. After heating to the first heating temperature TEMP1, if it is detected that the water vapor release amount is lower than the preset water vapor release amount threshold, the preheating step S2 is performed, otherwise, the heating time reaches the first continuous heating time t1.

[0117] In the preheating step S2, the water vapor release amount of the aerosol generating substrate 100 is detected. After being heated to the second heating temperature TEMP2, if the water vapor release amount is detected to be lower than the preset water vapor release amount threshold, a notification signal is issued, otherwise, the heating time reaches the second continuous heating time t2.

[0118] The device for detecting the water vapor release amount includes a water vapor sensor and / or a temperature sensor. The temperature sensor detects the temperature of the aerosol generating substrate 100. If the temperature exceeds a temperature threshold, it is determined that the water vapor release amount is lower than the water vapor release amount threshold.

[0119] In order to further verify the effect of the promoter on tobacco, a "thermogravimetric-mass spectrometry" experiment was further conducted. The promoter was ZSM-5 molecular sieve and the instrument was a thermogravimetric-mass spectrometer (TG-MS) (NETZSCH STA449F3+QMS403D, Germany).

[0120] The specific setting parameters are: atmosphere: nitrogen. Protective gas flow rate: 20mL / min. Purge gas flow rate: 50mL / min. Temperature: 40~390℃. Heating rate: 20℃ / min.

[0121] Accelerator 1: 40% to 60% by mass of Y-type molecular sieve, 20% to 30% by mass of magnesium oxide, and 20% to 30% by mass of sodium chloride.

[0122] Promoter 2: 40% to 60% by mass of Y-type molecular sieve and 40% to 60% by mass of alumina.

[0123] Accelerator 3: 40% to 60% by mass of Y-type molecular sieve and 40% to 60% by mass of calcium chloride.

[0124] The experimental steps are as follows: ① Grind the flue-cured tobacco raw material into powder, mix 5 mg of flue-cured tobacco powder with 3 mg of accelerator 1, accelerator 2, and accelerator 3 evenly as a sample, put the sample into the instrument, adjust the parameters, start the experiment and record the ion current intensity-temperature curve, such as Fig.13 ② Grind the burley tobacco raw material into powder, mix 5 mg of burley tobacco powder with 3 mg of accelerator 1, accelerator 2 and accelerator 3 evenly as a sample, put the sample into the instrument, adjust the parameters, start the experiment and record the ion current intensity-temperature curve, as shown in Fig.14③ Grind the roller-pressed sheet raw material into powder, mix 5 mg of reconstituted tobacco leaf powder with 3 mg of accelerator 1, accelerator 2, and accelerator 3 evenly as a sample, put the sample into the instrument, adjust the parameters, start the experiment and record the ion current intensity-temperature curve, as shown in Fig.15 shown.

[0125] exist Figures 13 to 15 In the ion current intensity-temperature curve, A(x) is used to represent the ion current intensity corresponding to point x on the ion current intensity-temperature curve, and T(x) is used to represent the temperature corresponding to point x on the ion current intensity-temperature curve. Under normal circumstances, the ion current intensity-temperature curve presents three obvious intervals, namely: 40℃ to b 0 The free water evaporation interval between 0 to d 0 The cell water evaporation interval between 0 The pyrolysis water evaporation interval between 300 °C and 390 °C. a represents the peak point in the free water evaporation interval; b represents the trough point at the junction of the free water evaporation interval and the cell water evaporation interval; c represents the peak point in the cell water evaporation interval; d represents the trough point at the junction of the cell water evaporation interval and the pyrolysis water evaporation interval; e represents the peak point in the pyrolysis water evaporation interval.

[0126] Table 1: Peak and valley table of water ion flow intensity of flue-cured tobacco

[0127]

[0128]

[0129] Table 2: Peak and valley table of water ion flux intensity of burley tobacco

[0130]

[0131] Table 3: Peak and valley table of water ion flux intensity of reconstituted tobacco leaves

[0132]

[0133] from Fig.13It can be seen from Table 1 that during the heating process of flue-cured tobacco at 40-390℃, moisture is continuously generated. The moisture ion current intensity peak near 100℃ (corresponding to point a0) is mainly caused by the evaporation of free water in the flue-cured tobacco; the second moisture ion current intensity peak (corresponding to point c0) appears in the temperature range of 203-216℃. Through further research, it is found that this part of moisture is mainly released from the inside of the cell due to the thermal destruction of the cell wall; the third moisture ion current intensity peak (corresponding to point e0) appears in the temperature range of 240-350℃. Through further analysis of tobacco powder that has been thoroughly dried, it is found that this part of moisture is mainly produced by the pyrolysis of cell wall components. When the cell moisture evaporation promoter is added to the flue-cured tobacco, the signal intensity of the moisture ion current intensity peak (corresponding to point en) in the temperature range of 240-350℃ weakens, while the overall moisture ion current intensity signal (such as point an, point bn, point cn, point dn) near 100℃ and in the temperature range of 203-216℃ increases significantly. This indicates that under the action of molecular sieve promoter, the process of cell wall destruction by heat is advanced to a lower temperature, so that the sample evaporates and releases moisture in advance during the preheating stage, thereby reducing the aerosol moisture content, alleviating the burning mouth feeling when the user takes the first puff, and improving the user experience.

[0134] from Fig.14 It can be seen from Table 2 that burley tobacco continuously generates moisture during the heating process at 40-390℃, and three moisture ion current intensity peaks appear. The moisture ion current intensity peak near 100℃ (corresponding to a 0 The second peak of water ion intensity appears at 275-288℃ (corresponding to c 0 point), the third water ion current intensity peak appears at 332-341℃ (corresponding to e 0 When the molecular sieve promoter is added to burley tobacco, the water ion current intensity at around 100°C increases as a whole (e.g. a n Point to c n point interval), so that the sample evaporates and releases water in advance during the preheating stage, thereby reducing the aerosol moisture content, alleviating the hot mouth feeling when the user takes the first puff, and improving the user experience.

[0135] from Fig.15 It can be seen from Table 3 that the roll-pressed sheet material will continuously generate water during the heating process, and three water ion current intensity peaks appear. The water ion current intensity peak near 100°C (corresponding to a 0 point) is mainly caused by the volatilization of free water in the roll-pressed sheet material; the second water ion current intensity peak appears at 180-210℃ (corresponding to c 0point), the third water ion current intensity peak appears at 270-290℃ (corresponding to e 0 When the molecular sieve promoter is added to the roll-pressed flake material, the water ion current intensity at around 100°C increases as a whole (e.g. a n Point to c n point interval), so that the sample evaporates and releases water in advance during the preheating stage, thereby reducing the aerosol moisture content, alleviating the hot mouth feeling when the user takes the first puff, and improving the user experience.

[0136] In other experiments, similar effects were also produced on spiced tobacco, cigars, and sun-cured tobacco when promoted by alkali metals such as magnesium oxide, aluminum oxide, zinc oxide, potassium chloride, calcium chloride, iron chloride, magnesium chloride, or sodium chloride.

[0137] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0138] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0139] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. An aerosol generating device (300), characterized in that: The invention comprises a shell (310), a heating mechanism (320) and a promoter (330); the shell (310) is provided with a chamber (311) for accommodating an aerosol generating matrix (100) and the promoter (330); the heating mechanism (320) is installed in the shell (310) and is used to heat the aerosol generating matrix (100) and the promoter (330) in the chamber (311); during the heating process, the promoter (330) contacts the aerosol generating matrix (100) and the promoter (330) is used to accelerate the evaporation of cell water in the aerosol generating matrix (100).

2. The aerosol generating device (300) according to claim 1, characterized in that: The accelerator (330) includes at least one of a cellulose pyrolysis catalyst, a hemicellulose pyrolysis catalyst, and a pectin pyrolysis catalyst; Preferably, the promoter (330) comprises a molecular sieve and a metal compound, the mass ratio of the molecular sieve to the metal compound is 1:(0.5-3), and the metal compound comprises a metal oxide and / or a metal salt; Preferably, the molecular sieve is a Y-type molecular sieve; Preferably, the metal salt is a metal chloride salt; Preferably, the metal compound is a metal oxide or a metal chloride; Preferably, the mass ratio of the metal oxide to the metal chloride is 1:(0.6-1.2); Preferably, the metal oxide is magnesium oxide and / or aluminum oxide, and the metal salt is sodium chloride and / or calcium chloride.

3. The aerosol generating device (300) according to claim 1, characterized in that: The aerosol generating device (300) further comprises a substrate (340), wherein the substrate (340) is disposed in the chamber (311) and is fixedly connected to the housing (310), and the accelerant (330) is fixedly disposed on the outer surface of the substrate (340); Preferably, the base (340) and the shell (310) are detachably connected; Preferably, the promoter (330) is distributed on the outer surface of the substrate (340) in a granular, strip, or mesh manner; wherein, when the promoter (330) is distributed on the outer surface of the substrate (340) in a granular manner, the D50 particle size range of the promoter (330) is 300 nm to 500 nm, and the density of the promoter (330) on the outer surface of the substrate (340) is 2.5 g / m 2 ~4.0g / m 2 ; Preferably, the substrate (340) is made of stainless steel, stainless iron, aluminum, titanium or ceramic.

4. The aerosol generating device (300) according to claim 3, characterized in that: The base (340) is detachably connected to the shell (310), and a breathable stopper (341) is provided on the base (340), and the cross section of the breathable stopper (341) is adapted to the cross section of the chamber (311).

5. The aerosol generating device (300) according to claim 3, characterized in that: One end of the base (340) is used for fixed connection with the housing (310), and the other end of the base (340) has a sharp portion (342).

6. The aerosol generating device (300) according to claim 3, characterized in that: The surface of the substrate (340) is provided with a defect structure, and the promoter (330) is fixed to the defect structure on the surface of the substrate (340); Alternatively, the accelerator (330) in particle form is bonded to the surface of the substrate (340) by an adhesive.

7. The aerosol generating device (300) according to any one of claims 1 to 6, characterized in that: The heating mechanism (320) comprises a power supply (321), a main control circuit, and at least one heating body (322); the heating body (322) is arranged in the chamber (311); the power supply (321) provides an electric driving force and controls the heating body (322) to generate heat through the main control circuit; Preferably, when a substrate (340) is disposed in the chamber (311), the heating body (322) is in thermal contact with the substrate (340).

8. The aerosol generating device (300) according to claim 7, characterized in that: The heating element (322) is in thermal contact with the substrate (340), and a cavity (343) for accommodating the heating element (322) is formed in the substrate (340).

9. An aerosol generating system, characterized in that: It includes an aerosol - generating substrate (100) and an aerosol - generating device (300) according to any one of claims 1 to 8.

10. A heating method for aerosol generation using the aerosol generating system according to claim 9, characterized in that: This heating method is used to heat a natural - plant aerosol - generating substrate (100) to generate an aerosol. The natural - plant aerosol - generating substrate (100) has a free - moisture evaporation range, a cell - moisture evaporation range, and a pyrolysis - moisture evaporation range. The free - moisture evaporation range, the cell - moisture evaporation range, and the pyrolysis - moisture evaporation range do not overlap. The temperature in the free - moisture evaporation range is lower than that in the cell - moisture evaporation range, and the temperature in the pyrolysis - moisture evaporation range is higher than that in the cell - moisture evaporation range. This heating method includes the following steps: Exhaust step S1: Heat the aerosol - generating substrate (100) to a first heating temperature TEMP1, and maintain the heating process for a first continuous heating time t1. The first heating temperature TEMP1 is within the free - moisture evaporation range or the cell - moisture evaporation range of the aerosol - generating substrate (100). The free - moisture evaporation range is 100°C to 140°C, and the cell - moisture evaporation range is 140°C to 180°C. When the first heating temperature TEMP1 is within the free - moisture evaporation range, the first heating temperature TEMP1 satisfies: 100°C ≤ TEMP1 ≤ 110°C or 110°C ≤ TEMP1 ≤ 125°C or 125°C ≤ TEMP1 ≤ 140°C; the first continuous heating time t1 satisfies: 2s ≤ t1 ≤ 3s or 3s ≤ t1 ≤ 4s or 4s ≤ t1 ≤ 6s or 6s ≤ t1 ≤ 8s or 8s ≤ t1 ≤ 10s. In the free water evaporation range, the water evaporation peak value A(Ta) of the natural plant raw material in the presence of the accelerator (330) n ) and the water evaporation peak value A(Ta0) of the natural plant raw material in the absence of the promoter (330) satisfy: A(Ta n )≥A(Ta0)×110%; where a n represents the peak point of the ion flux intensity of the natural plant raw material in the free water evaporation range when the promoter (330) is present, a0 represents the peak point of the ion flux intensity of the natural plant raw material in the free water evaporation range when the promoter (330) is not present, and Ta n Indicates the peak point a n The corresponding temperature, Ta0 represents the temperature corresponding to the peak point a0, A(Ta n ) represents the peak point a n The corresponding ion current intensity, A(Ta0) represents the ion current intensity corresponding to the peak point a0; When the first heating temperature TEMP1 is within the cell - moisture evaporation range, the first heating temperature TEMP1 satisfies: 140°C < TEMP1 ≤ 150°C or 150°C ≤ TEMP1 ≤ 165°C or 165°C ≤ TEMP1 ≤ 180°C, and the first continuous heating time t1 satisfies: 4s ≤ t1 ≤ 6s or 6s ≤ t1 ≤ 8s or 8s ≤ t1 ≤ 10s or 10s ≤ t1 ≤ 12s or 12s ≤ t1 < 15s. In the cell water evaporation range, the water evaporation peak value A(Tc n ) and the water evaporation peak value A(Tc0) of the cellulose in the absence of the promoter (330) satisfy: A(Tc n )≥A(Tc0)×150%; where c n represents the peak point of the ion current intensity of the cellulose in the cell water evaporation interval when the promoter (330) is present, c0 represents the peak point of the ion current intensity of the cellulose in the cell water evaporation interval when the promoter (330) is not present, Tc n Indicates the peak point c n The corresponding temperature, Tc0 represents the temperature corresponding to the peak point c0, A(Tc n ) represents the peak point c n The corresponding ion current intensity, A(Tc0) represents the ion current intensity corresponding to the peak point c0; Pre - heating step S2: Heat the aerosol - generating substrate (100) to a second heating temperature TEMP2, and maintain the heating process for a second continuous heating time t2. The second heating temperature TEMP2 is within the pyrolysis - moisture evaporation range of the aerosol - generating substrate (100). The pyrolysis - moisture evaporation range is 290°C to 340°C. The second heating temperature TEMP2 satisfies: 290°C < TEMP2 ≤ 300°C or 300°C < TEMP2 ≤ 320°C or 320°C < TEMP2 ≤ 340°C. The first continuous heating time t1 and the second continuous heating time t2 satisfy: t1 + t2 ≤ 15s or t1 + t2 ≤ 18s or t1 + t2 ≤ 20s or t1 + t2 ≤ 23s or t1 + t2 ≤ 25s or t1 + t2 ≤ 28s or t1 + t2 ≤ 30s. In the pyrolysis water evaporation range, the water evaporation peak value A(Te n ) and the water evaporation peak value A(Te0) of the cellulose in the absence of the promoter (330) satisfy: A(Te n )≤A(Te0)×90%; where e n represents the peak point of the ion flux intensity of the cellulose in the pyrolysis water evaporation interval when the promoter (330) is present, e0 represents the peak point of the ion flux intensity of the cellulose in the pyrolysis water evaporation interval when the promoter (330) is not present, Te n Indicates the peak point e n The corresponding temperature, Te0 represents the temperature corresponding to the peak point e0, A(Te n ) represents the peak point e n The corresponding ion current intensity, A(Te0) represents the ion current intensity corresponding to the peak point e0; Heating step S3: heating the aerosol generating substrate (100) to a third heating temperature TEMP3, the heating process is maintained for a third continuous heating time t3, the third heating temperature TEMP3 is within the pyrolysis water evaporation range of the aerosol generating substrate (100), and the third heating temperature TEMP3 is lower than the second heating temperature TEMP2; In the steam exhaust step S1, the water vapor release amount of the aerosol generating substrate (100) is detected, and after heating to the first heating temperature TEMP1, if it is detected that the water vapor release amount is lower than a preset water vapor release amount threshold, the preheating step S2 is performed, otherwise, the heating time reaches the first continuous heating time t1; In the preheating step S2, the water vapor release amount of the aerosol generating substrate (100) is detected, and after heating to the second heating temperature TEMP2, if it is detected that the water vapor release amount is lower than a preset water vapor release amount threshold, a notification signal is issued, otherwise, until the heating time reaches a second continuous heating time t2; The device for detecting the amount of water vapor released comprises a water vapor sensor and / or a temperature sensor. The temperature sensor detects the temperature of the aerosol generating substrate (100). If the detected temperature exceeds a preset temperature threshold, it is determined that the amount of water vapor released is lower than a preset water vapor release threshold.

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