WO2024008162A1 - Heating device, aerosol generating device, and aerosol generating system - Google Patents

Abstract

A heating device (100), an aerosol generating device (1000), and an aerosol generating system (10000). The heating device (100) comprises a heat preservation assembly (10) and an airflow heating assembly (20); the heat preservation assembly (10) is internally provided with an accommodating cavity (11), and the accommodating cavity (11) is used for accommodating an aerosol generating product (2000); and the airflow heating assembly (20) is disposed in the accommodating cavity (11), and the airflow heating assembly (20) is used for heating gas flowing through the airflow heating assembly (20), so that the heated gas can heat the aerosol generating product (2000) placed in the accommodating cavity (11). When the aerosol generating product (2000) is placed in the accommodating cavity (11), heat of the inner wall surface of the heat preservation assembly (10) can be transferred to the circumferential outer surface of the aerosol generating product (2000) for auxiliary heating, so that the heat of the heat preservation assembly (10) is effectively used, and parts of the heating device (100) are reduced.

Description

Heating device, aerosol generating device and aerosol generating system

Cross-references to related applications

This application requests the priority of the Chinese patent application submitted to the China Patent Office on July 8, 2022, with the application number 202210800951.1, titled "Heating device, aerosol generation device and aerosol generation system", and it is requested in 2023 The priority of the Chinese patent application titled "Heating Mechanism and Aerosol Generating Device" was submitted to the China Patent Office on March 24 with the application number 202320733081.0, the entire content of which is incorporated into this application by reference.

Technical field

Embodiments of the present application relate to the technical field of aerosol generating devices, and in particular, to a heating device, an aerosol generating device and an aerosol generating system.

Background technique

With the development and promotion of heat-not-burn technology, aerosol generating devices are increasingly used. The most important component in the aerosol-generating device is the heating device. The aerosol-generating product is heated by the heating device, so that the aerosol-generating product can generate smoke. Existing products generally use a heating device at the air inlet end of the aerosol-generating product. The components are heated.

In the process of implementing the embodiments of the present application, the inventor found that the design method of only arranging the heating component at the air inlet end of the aerosol-generating product will cause uneven circumferential heating of the aerosol-generating product.

Application content

The embodiments of the present application are intended to provide a heating device, an aerosol generating device and an aerosol generating system. By fitting the thermal insulation component and the aerosol-generating product, the heat of the thermal insulation component heated by the heating component can be transferred to the aerosol-generating product. The circumferential outer surface effectively utilizes the heat of the insulation component and reduces the parts of the heating device.

In order to solve the above technical problems, one technical solution adopted by the embodiments of the present application is to provide a heating device for heating aerosol-generating products, including: a heat preservation component and an air flow heating Component, insulation component, the insulation component includes an inner tube part and an outer tube part, a receiving cavity is provided inside the inner tube part, the outer tube part is arranged around the inner tube part, the outer tube part and the There is a cavity enclosed between the inner tube parts. The cavity is vacuumed or filled with a medium with low thermal conductivity. The receiving cavity is used to accommodate aerosol-generating products; an airflow heating component is provided. In the receiving chamber, the airflow heating component is used to heat the gas flowing through the airflow heating component, so that the heated gas heats the aerosol-generating product placed in the receiving chamber.

In order to solve the above technical problems, another technical solution adopted by the embodiment of the present application is to provide an aerosol generating device, which includes a housing, a circuit device, a sheath and a heating device as described above. The housing is provided with a receiving space and a A first plug-in interface, the first plug-in interface is connected with the receiving cavity, the receiving space is used to accommodate the circuit device, the sheath and the heating device, the sheath is set on the heating device Outside the device, the sheath is used to accommodate and support the heating device, the first plug port is used for external aerosol-generating products to be inserted into or pulled out of the sheath and the heating device, and the circuit device is connected to the heating device. The heating device is electrically connected, and the circuit device is used to provide electrical energy to the heating device.

In order to solve the above technical problems, another technical solution adopted by the embodiment of the present application is to provide an aerosol generating system, including an aerosol generating product and an aerosol generating device as described above, the aerosol generating device is used to provide The aerosol-generating product is plugged in, and the aerosol-generating device is used to heat the aerosol-generating product plugged in the receiving cavity. The aerosol-generating product at least includes a tobacco section, a cooling section and a mouthpiece section, The tobacco section, the cooling section and the mouthpiece section are connected in sequence. When the aerosol-generating product is inserted into the receiving cavity, the axial length of the tobacco section is equal to or slightly larger than the tobacco section inserted into the cavity. into the length of the receiving cavity.

The heating device in the embodiment of the present application includes an insulation component and an airflow heating component. The insulation component is provided with a receiving cavity. The receiving cavity is used to accommodate aerosol-generating products. The airflow heating component is disposed in the receiving cavity. The airflow heating component is used to heat the airflow. The gas in the heating component causes the heated gas to heat the aerosol-generating product placed in the receiving chamber. When the aerosol-generating product is placed in the receiving chamber, the inner surface of the insulation component is in contact with the circumferential outer surface of the aerosol-generating product. The surfaces are close to each other, and the heat from the inner wall of the insulation component can be transferred to the aerosol-generating product. The circumferential outer surface is used for auxiliary heating, which effectively utilizes the heat of the insulation component and reduces the parts of the heating device.

Description of the drawings

One or more embodiments are illustrated through the corresponding drawings. These exemplary illustrations do not constitute limitations to the embodiments. Elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified. It is stated that the figures in the accompanying drawings do not constitute limitations on scale.

Figure 1 is a cross-sectional view of a heating device according to an embodiment of the present application.

Figure 2 is a cross-sectional view of the heat preservation component of the heating device according to the embodiment of the present application.

3 is a cross-sectional view of the heat preservation component of the heating device according to another embodiment of the present application.

FIG. 4 is a cross-sectional view of the heat preservation component of the heating device according to another embodiment of the present application.

Figure 5 is a cross-sectional view of the heat preservation component of the heating device according to another embodiment of the present application.

Figure 6 is an exploded view of the heating device according to the embodiment of the present application.

Figure 7 is an exploded view of the heating element in the heating device according to the embodiment of the present application, which is a heating element.

FIG. 8 is an exploded view from a perspective of a heating device in which the heating element is a metal heating mesh according to the embodiment of the present application.

FIG. 9 is an exploded view from a perspective of the heating device in the embodiment of the present application in which the heating element is an FPC heating film.

Figure 10 is an exploded view from a perspective of a heating element in the heating device according to the embodiment of the present application, which is a resistance heating element.

FIG. 11 is an exploded view from a perspective of the heating device of the embodiment of the present application, where the heating element is an induction coil.

Figure 12 is a cross-sectional view of the heating device from another perspective according to the embodiment of the present application.

Figure 13 is a cross-sectional view of the heating device in the embodiment of the present application in which the heating element is a heating circuit coating.

Figure 14 is a cross-sectional view of the aerosol generation system according to the embodiment of the present application.

Figure 15 is a cross-sectional view of the housing and sheath of the aerosol generating device according to the embodiment of the present application.

Figure 16 is an exploded view of the sheath of the aerosol generating device according to the embodiment of the present application.

FIG. 17 is an enlarged view of part A in FIG. 12 .

Figure 18 is a schematic view of the end cover of the aerosol generating device according to the embodiment of the present application.

Figure 19 is a schematic view of the second heat insulating member of the aerosol generating device according to the embodiment of the present application.

FIG. 20 is an enlarged view of part B in FIG. 12 .

Figure 21 is a cross-sectional view of the heating device in Embodiment 2 of the present application.

Figure 22 is a cross-sectional view of the heat preservation component in the heating device according to Embodiment 2 of the present application.

Figure 23 is a cross-sectional view of the heat preservation component in another heating device according to Embodiment 2 of the present application.

Figure 24 is a cross-sectional view of another heating device in Embodiment 2 of the present application.

Detailed ways

In order to facilitate understanding of the present application, the present application will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is referred to as being "fixed to"/"attached to"/"mounted on" another element, it can be directly on the other element, or there may be one or more intervening elements present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element, or there may be one or more intervening elements present therebetween. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only.

Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by a person skilled in the technical field belonging to this application. The terms used in the description of the present application are only for the purpose of describing specific embodiments and are not used to limit the present application. As used in this specification, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

In this specification, "installation" includes welding, screwing, snapping, gluing, etc. to fix or restrict a certain component or device to a specific position or place. The component or device can be maintained at a specific position or place. It can move within a limited range even if it is not moving. The component or device is fixed. Or it may or may not be disassembled after being restricted to a specific position or place, which is not limited in the embodiments of this application.

Embodiment 1

Please refer to Figure 1. The heating device 100 includes a heat preservation component 10 and an airflow heating component 20. The heat preservation component 10 is provided with a receiving cavity 11 connected to the outside world. The airflow heating component 20 is disposed at one end of the receiving cavity 11. The receiving cavity 11 The other end is used to accommodate the aerosol generating article 2000. When the aerosol-generating product 2000 is placed in the receiving chamber 11 , the air inlet end of the aerosol-generating product 2000 is close to the airflow heating component 20 , and the inner surface of the insulation component 10 is close to the circumferential outer surface of the aerosol-generating product 2000 . The close fit means that the distance L1 between the inner surface of the thermal insulation component 10 and the circumferential outer surface of the aerosol-generating product 2000 placed in the containing cavity 11 is: 0 mm ≤ L1 ≤ 2 mm. In some embodiments, the distance L1 satisfies: 0.2mm≤L1≤0.7mm. In some embodiments, the distance L1 is 0.5 mm. The airflow heating component 20 is used to heat the gas flowing through the airflow heating component 20 , so that the heated gas heats the aerosol-generating product 2000 placed in the receiving chamber 11 . At the same time, the inner surface of the insulation component 10 is heated by the airflow heating component 20 The heated heat can be directly or indirectly transferred to the outer surface of the aerosol-generating product 2000 to assist in heating the aerosol-generating product 2000 , fully utilizing the heat of the insulation component 10 .

In some embodiments, please continue to refer to FIG. 1 . The heating device 100 also includes a temperature measuring element 30 . The temperature measuring element 30 is disposed inside the airflow heating assembly 20 . The temperature measuring element 30 is used to measure the temperature of the airflow heating assembly 20 so as to facilitate The temperature of the airflow heating component 20 is monitored and controlled in real time.

For the above-mentioned insulation component 10, please refer to Figure 2. The insulation component 10 includes an inner tube part 12 and an outer tube part 13. The inner tube part 12 is provided with a receiving cavity 11. The outer tube part 13 is arranged around the inner tube part 12. The outer tube part 13 and the inner tube part 12 together form a closed cavity 14. The inside of the closed cavity 14 is in a vacuum state or filled with inert gas with low thermal conductivity, so that the temperature of the outer tube part 13 of the insulation assembly 10 is lower than that of the inner tube. The temperature of part 12 can play the role of heat insulation. It is worth noting that when the inside of the closed cavity 14 is in a vacuum state, it does not mean that the inside of the closed cavity 14 is completely vacuum, but it should be understood that the air pressure in the closed cavity 14 is lower than the standard atmospheric pressure, that is, the closed cavity 14 is in a negative state. Pressure state, using the degree of vacuum to measure the rarefaction of the gas in the closed cavity 14 degree.

It can be understood that in some embodiments, please refer to FIG. 3 , the outer tube part 13 and the inner tube part 12 jointly form a cavity 14 connected to the outside world, and the cavity 14 is filled with a medium with low thermal conductivity, such as glass. Fiber, asbestos, rock wool, silicate and other insulation materials.

In some embodiments, please refer to FIG. 4 , the insulation assembly 10 may further include a contact member 15 disposed on the inner surface of the inner tube part 12 , and the contact member 15 is located between the first chamber 111 and the second chamber 111 . between chambers 112. The contact piece 15 is used to connect with the air flow heating assembly 20 to fix the air flow heating assembly 20 in the first chamber 111. At the same time, the contact piece 15 also has a limiting effect on the air flow heating assembly 20 to prevent the air flow heating assembly 20 from being During installation, the first chamber 111 is exceeded into the second chamber 112 . In some embodiments, the abutting member 15 may be a rib, a button tooth, or the like.

In some embodiments, when the heating device 100 is in normal working condition, the insulation assembly 10 meets at least one of the following conditions: the temperature of the inner tube part 12 is 100°C to 150°C; and the temperature of the outer tube part 13 is 40°C to 150°C. 80℃.

In some embodiments, when the aerosol-generating article 2000 is placed in the containing chamber 11 and the heating device 100 is in normal operation, the inner tube portion 12 meets at least one of the following conditions: the inner tube portion 12 is close to the aerosol-generating article 2000 The temperature of one end is 100°C to 120°C; and the temperature of one end of the inner tube portion 12 close to the airflow heating component 20 is 120°C to 150°C.

For the above-mentioned receiving cavity 11, please continue to refer to Figure 2. The receiving cavity 11 is provided with a first chamber 111 and a second chamber 112. The first chamber 111 and the second chamber 112 are connected along the first direction X, wherein, The first direction X is parallel to the center line of the thermal insulation component 10 . The first chamber 111 is used to install the airflow heating assembly 20, and the second chamber 112 is used to install the aerosol-generating article 2000. When the aerosol-generating article 2000 is installed in the second chamber 112 and the user inhales the air outlet end of the aerosol-generating article 2000 (the air inlet end and the air outlet end are respectively provided at both ends of the aerosol-generating article 2000), the aerosol Negative pressure is generated inside, and the external gas flows through the airflow heating assembly 20 and is heated by the airflow heating assembly 20 , and then enters the inside of the aerosol-generating product 2000 from the air inlet end, completing the heating of the aerosol-generating product 2000 .

In some embodiments, please continue to refer to FIG. 2 , the cross-sectional area of the first chamber 111 is larger than the cross-sectional area of the second chamber 112 , so that the shape of the receiving chamber 11 is stepped, which can It is beneficial to ensure that when the outer contour of the airflow heating component 20 along the first direction X is larger than the outer contour of the aerosol-generating article 2000 along the first direction The outer surface is close to fit, and at the same time, it is also convenient for the airflow heating component 20 to be installed in the first chamber 111 . Wherein, the cross-section of the first chamber 111 and the cross-section of the second chamber 112 are both perpendicular to the first direction X. It can be understood that in some embodiments, the inner diameters of the receiving chamber 11 along the first direction X may also be the same.

In the embodiment of the present application, the receiving cavity 11 penetrates the inner tube portion 12 along the first direction Please refer to Figure 4, in which arrows indicate the direction of air flow. The insulation assembly 10 also includes a peripheral plate 16. The peripheral plate 16 is provided on the outside of the outer tube portion 13, so that the openings of the accommodation cavity 11 to the outside can be located at the openings of the insulation assembly 10. At the same end, an air inlet channel is formed between the peripheral plate 16 and the outer tube portion 13 . When the gas flows through the air inlet channel, it absorbs the heat of the outer tube portion 13 , so that the gas is preheated before entering the air guide channel 211 .

Regarding the airflow heating assembly 20 mentioned above, please refer to FIG. 6 . The airflow heating assembly 20 includes an air guide element 21 and a heating element 22 . The gas guide element 21 is used to provide gas flow, and the heating element 22 is used to heat the gas guide element 21 , or the gas guide element 21 self-heats under the action of the heating element 22 , thereby heating the gas flowing through the gas guide element 21 .

In the embodiment of the present application, the air guide element 21 is made of graphite, and the air guide element 21 has good thermal conductivity, which is beneficial to improving heating efficiency. In some embodiments, the gas-guiding element 21 is made of graphite alloy, where the graphite alloy has good magnetic permeability properties and has high thermal conductivity. The good magnetic permeability characteristics allow the heating element 22 to use electromagnetic heating methods other than resistance heating methods, so that the air-conducting element 21 can also generate heat, increasing the heating options. Higher thermal conductivity can effectively reduce the time required for the heating element 22 to heat the air guide element 21 to a predetermined temperature, thereby improving the heating efficiency of the airflow heating assembly 20 .

Referring to FIG. 7 , the air guide element 21 is provided with a second installation groove 212 and at least one through-flow air guide channel 211 . The air guide channel 211 allows external air to flow from one end of the air guide element 21 to the other end of the air guide element 21 . In the embodiment of the present application, the air guide channel 211 penetrates the air guide element 21 along the first direction X, and the number of the air guide channels 211 is multiple. In some other embodiments, the shape of the air guide channel 211 may be an irregular shape. For example, the air guide channel 211 may be in an irregular shape. The internal shape of the element 21 can be inclined, spiral or circuitous, as long as the external air passes through the air guide channel 211 from one end of the air guide element 21 and then flows to the other end of the air guide element 21 . The second mounting groove 212 is located at the center of the cross section of the air guide element 21 and is used to install the temperature measuring element 30 , wherein the cross section of the air guide element 21 is perpendicular to the first direction X. By arranging the second installation groove 212 at the center of the cross section of the air guide element 21, the temperature data obtained by the temperature measuring element 30 can be closer to the temperature at which the airflow is heated, thereby improving the temperature control of the airflow heating assembly 20. Accuracy. Of course, in some embodiments, the second installation groove 212 is an air guide channel 211 located at the cross-sectional center of the air guide element 21 , and the temperature measuring element 30 is disposed in the air guide channel 211 .

The shape of the plurality of air guide channels 211 is cylindrical, and the diameter D1 of the air guide channel 211 satisfies: 0<D1≤0.5mm. By using the solution of small diameter air guide channels 211, on the one hand, the number of the air guide channels 211 can be increased. , on the other hand, it can improve the heating efficiency of the gas flowing through the air guide channel 211, and prevent the gas flow rate from being too large due to the air guide channel 211 being too large, and the gas heating effect being poor.

The ratio of the sum of the cross-sectional areas of the multiple air guide channels 211 to the cross-sectional area of the air guide element 21 is greater than or equal to 1/5; wherein, the cross section of the air guide channels 211 is within the cross section of the air guide element 21 , the cross section of the air guide channel 211 and the cross section of the air guide element 21 are both perpendicular to the center line of the air guide element 21 . On the premise that the structural stability of the air guide element 21 is satisfied, the closer the ratio of the cross-sectional area of the air guide channel 211 to the cross-sectional area of the air guide element 21 is to 1, it means that the effective area of the air guide channel 211 is larger. The larger the area available for gas flow, and when the cross-sectional area of a single air guide channel 211 is fixed, the greater the number of air guide channels 211 that can be provided on the air guide element 21 .

A plurality of air guide channels 211 are arranged around the center of the air guide element 21 . The ratio of the number of air guide channels 211 located on the inner ring to the number of air guide channels 211 located on the outer ring is equal to the ratio of the radius of the inner ring to the radius of the outer ring. . Along the direction from the center of the cross section of the air guide element 21 to the edge of the cross section of the air guide element 21, an increasing number of air guide channels 211 can be provided, which can increase the flow of gas through the channels. In some embodiments, the plurality of air guide channels 211 are arranged in a circular array, that is, the distance between two adjacent air guide channels 211 located in the same circle is equal.

The air guide element 21 meets at least one of the following conditions: (1) The diameter D3 of the air guide element 21 is: 4mm ≤ D3 ≤ 8mm; (2) The diameter D3 of the air guide element 21 is: 6mm ≤ D3 ≤ 7mm; (3) The cross-sectional area S1 of the air guide element 21 is: 10mm ² ≤ S1 ≤ 50mm ² ; (4 ) The cross-sectional area S1 of the air guide element 21 is: 25mm ² ≤ S1 ≤ 35mm ² ; (5) The axial length L1 of the air guide element 21 is: 5mm ≤ L1 ≤ 10mm; (6) The axial direction of the air guide element 21 The length L1 is: 7mm≤L1≤9mm.

In the embodiment of the present application, the cross-sectional area of the air guide element 21 is the same as the cross-sectional area of the second chamber 112, so that the air guide element 21 covers the aerosol-generating product 2000 contained in the second chamber 112 as much as possible. The air inlet end ensures that the air flow heated by the air guide element 21 has a large heating area for the aerosol-generating product 2000. Since the cross-sectional area of the first chamber 111 is larger than the cross-sectional area of the second chamber 112 , the heating element 22 can be disposed circumferentially outside the air guide element 21 . Of course, in some embodiments, the heating element 22 can be installed by reducing part of the outer diameter of the air guide element 21 so that there is a gap between the air guide element 21 and the heat preservation component 10 , thereby making the first chamber 111 The cross-sectional area is consistent with the cross-sectional area of the second chamber 112 , which facilitates processing and manufacturing of the insulation component 10 .

In some embodiments, please continue to refer to FIG. 7 , the air guide element 21 includes a first air guide block 213 and a second air guide block 214 . The first air guide block 213 is provided with a first groove 2131, and the second air guide block 214 is provided with a second groove 2141. When the first air guide block 213 and the second air guide block 214 are spliced, the first groove 2131 Together with the second groove 2141, the above-mentioned second mounting groove 212 is enclosed. The gas guide element 21 adopts a split design, which can help the temperature measuring element 30 to be more easily installed in the second installation groove 212 and improve the assembly efficiency of the heating device 100.

In some embodiments, please continue to refer to FIG. 7 , the air guide element 21 is provided with a first installation groove 215 , and the first installation groove 215 is used to install the heating element 22 . The number of the first mounting slot 215 is at least one. When the number of the first mounting slot 215 is one, the first mounting slot 215 is disposed at the center of the air guide element 21 . By arranging the heating element 22 in the center of the air guide element 21 , the characteristic of the heating element 22 emitting heat outwards in a spot-like manner can be fully utilized, thereby reducing the heat loss of the heating element 22 . When the number of the first installation slots 215 is two or more, the two or more first installation slots 215 are arranged around the center of the air guide element 21 , that is, the first installation slot 215 is located between the center of the air guide element 21 and the air guide element 21 . The heating element 22 can be installed in each first installation groove 215 between the edges of the element 21 . By arranging the first mounting groove 215 on the air guide element Between the center and the edge of the air guide element 21, the heating element 22 can quickly heat the air guide element 21, and the degree of heating between the center and the edge of the air guide element 21 is relatively uniform. Of course, the first mounting groove 215 can be configured as a through groove or a blind groove according to actual conditions.

The diameter D2 of the first installation groove 215 satisfies: 0mm<D2≤1.7mm. On the premise that the first installation groove 215 can install the heating element 20, the smaller the diameter of the first installation groove 215, the more conducive to increasing the air guide channel. 211 quantity.

In some embodiments, please continue to refer to FIG. 7 , the circumferential outer surface of the air guide element 21 is provided with a first mounting area 216 and a second mounting area 217 . The first installation area 216 is used to connect with the inner surface of the inner tube part 12 of the insulation component 10 through an interference fit. Under the action of friction, the air guide element 21 is fixed to the inner tube part 12. In some embodiments, the first mounting area 216 is provided with a first protrusion 2161 , and the first protrusion 2161 abuts with the inner surface of the inner tube portion 12 of the insulation assembly 10 to form line contact or point contact. Of course, in other embodiments, the first installation area 216 can be connected to the inner tube portion 12 through other connection methods, such as bonding.

The second installation area 217 is not in contact with the inner surface of the inner tube portion 12 of the insulation assembly 10 . A gap is formed between the second installation area 217 and the inner tube part 12, which can reduce the contact area between the air guide element 21 and the inner tube part 12, and prevent the heat of the air guide element 21 from being transferred to the inner tube part 12 of the insulation assembly 10 too quickly. . In some embodiments, the second installation area 217 can be used to install the heating element 22. The heating element 22 is sleeved on the outer surface of the second installation area 217 to heat the air guide element 21 from the outside to the inside. By arranging the heating element 22 in the second installation area 217, the structural layout among the heating element 22, the air guide element 21 and the heat preservation component 10 can be more compact while the heating element 22 meets the heating function.

Regarding the above-mentioned heating element 22, in some embodiments, please refer to Figures 8 and 9. The heating element 22 includes a metal heating mesh 221 or an FPC (Flexible Printed Circuit) heating film 222. The metal heating mesh 221 or the FPC heating film 222 is at least partially surrounding the outer peripheral surface of the air guide element 21. The metal heating mesh 221 or the FPC heating film 222 is electrically connected to the external power supply. When the external power supply affects the metal heating mesh 221 or the FPC heating film 222, When the FPC heating film 222 is powered, the metal heating mesh 221 or the FPC heating film 222 can generate heat, thereby heating the air guide element 21 . The surface of the metal heating mesh 221 and the surface of the FPC heating film 222 are both oxidized or electrically insulated, so that the metal heating mesh 221 Or the FPC heating film 222 only conducts heat to the outside but does not conduct electricity.

In some embodiments, please refer to FIG. 10 , the heating element 22 includes a resistance heating element 223 , a first insulating layer 224 and a second insulating layer 225 . The resistance heating element 223 is at least partially disposed on the outer peripheral surface of the air guide element 21 . The first The insulating layer 224 is disposed between the gas conducting element 21 and the resistance heating element 223 , and the second insulating layer 225 is disposed between the resistance heating element 223 and the inner surface of the inner tube portion 12 of the heat preservation component 10 . The resistance heating element 223 is electrically connected to the external power supply. When the external power supply supplies power to the resistance heating element 223, the resistance heating element 223 can generate heat, thereby heating the air guide element 21. The first insulating layer 224 and the second insulating layer 225 are both used to electrically insulate the resistance heating element 223 to prevent the electric energy from the external power supply from being transmitted to the air conductive element 21 or the thermal insulation component 10 causing leakage, thereby improving the safety of the heating device 100 .

In some embodiments, the first insulating layer 224 and the second insulating layer 225 also have viscosity to fix the resistance heating element 223 and the gas conducting element 21 in the first chamber 111 of the receiving cavity 11 . Specifically, the first insulation layer 224 fixes the air-conducting element 21 to the resistance heating element 223 , and the second insulation layer 225 fixes the resistance heating element 223 to the inner tube part 12 of the heat preservation component 10 .

In some embodiments, please refer to FIG. 11 , the heating element 22 includes an induction coil 226 , the induction coil 226 is sleeved on the circumferential outer surface of the air guide element 21 , and the induction coil 226 is electrically connected to an external power source. When the external power supply supplies power to the induction coil 226, the induction coil 226 generates an alternating magnetic field. When the air-guiding element 21 with good magnetic permeability is located in the alternating magnetic field, it can generate heat, thereby regulating the airflow flowing through the air-guiding element 21. heating.

In some embodiments, please continue to refer to FIG. 11 . The heating element 22 further includes a bracket 227 . The bracket 227 is cylindrical in shape. The induction coil 226 is wound around the bracket 227 . The bracket 227 is sleeved on the outside of the air guide element 21 . The bracket 227 is used to support the induction coil 226 and prevent the induction coil 226 from deforming.

In some embodiments, please continue to refer to FIG. 11 . The heating element 22 further includes a magnetic field shielding layer 228 . The magnetic field shielding layer 228 is disposed between the induction coil 226 and the inner tube portion 12 of the insulation assembly 10 . The magnetic field shielding layer 228 is used for shielding. The alternating magnetic field generated by the energized induction coil 226 affects the inner tube portion 12 and reduces the heat generated in the inner tube portion 12 .

In some embodiments, referring to FIG. 7 , the heating element 22 includes a heating element 229 . fever The heating element 229 is arranged in the first installation slot 215. The heating element 229 is a resistance-heating columnar body. The heating element 229 is electrically connected to an external power supply. The heating element 229 is arranged in the first installation slot 215. The heating element 229 is in a point-ray shape. By transferring heat outward, compared with the heating method from outside to inside, the energy consumption loss of the heating element 229 is less, and the heat utilization rate is high.

In some embodiments, the heating element 229 is spirally formed by a resistance heating wire, or the heating element 229 is cylindrical with a ventilation air gap. The hollow state of the heating element 229 can facilitate the flow of gas in the first installation groove 215 and increase the airflow and air gap. The contact area of the air guide element 21.

The heating element 229 meets at least one of the following conditions: (1) The diameter D4 of the heating element 229 satisfies: 1mm≤D4≤2mm; (2) The diameter D4 of the heating element 229 satisfies: 1.4mm≤D4≤1.7mm; (3) Heating The area S2 enclosed by the outer contour of the cross section of the body 229 is: 0.7mm ² ≤ S2 ≤ 3.5mm ² , where the cross section of the air guide element 21 is perpendicular to the center line of the air guide element 21; (4) Heating element The axial length L2 of 229 is: 4mm≤L2≤9mm.

It is worth noting that in some embodiments, when the first installation groove 215 provided with the heating element 229 and the second installation groove 212 provided with the temperature measuring element 30 are located at the center of the air guide element 21 at the same time, the first installation groove 215 and the second installation slot 212 are the same installation slot, and the heating element 229 and the temperature measuring element 30 are both located in this installation slot. At this time, the temperature measuring element 30 adopts the TCR (Temperature Coefficient of Resistance) temperature measurement method. Take a temperature measurement. Of course, in some other embodiments, the temperature measuring element 30 can also use NTC (Negative Temperature Coefficient), thermistor, or thermocouple to measure temperature.

In some embodiments, please refer to Figures 12 and 13. The heating element 22 is a heating circuit coating 230. The heating circuit coating 230 is coated on the inner wall surface of the inner tube portion 12. The heating circuit coating 230 is connected to the outside world through wires. Power supply electrical connection. After the air guide element 21 is installed in the first chamber 111, the outer peripheral surface of the air guide element 21 is at least partially in contact with the heating circuit coating 230, and the heating circuit coating 230 is used to heat the air guide element 21. The heating circuit coating 230 has the characteristics of thin coating and high heating efficiency, which can reduce the volume of the airflow heating component 20. In addition, the heating circuit coating 230 is directly coated on the inner surface of the inner tube part 12 and becomes integrated with the insulation component 10. , can reduce the number of parts and make installation more convenient.

It is worth noting that, in order to save the power consumption of the heating element 22, in the embodiment of the present application, only The above-mentioned heating circuit coating 230 is coated on the inner wall surface of the first chamber 111 , and the above-mentioned heating circuit coating 230 is not coated on the inner wall surface of the second chamber 112 . Since the thermal conductivity of the air guide element 21 is high, coating the heating circuit coating 230 on the inner wall of the first chamber 111 can have a higher thermal conductivity, less heat loss and a short heating time. However, if the inner wall of the first chamber 111 is The inner wall surface of the chamber 112 is provided with a heating circuit coating 230. The thermal conductivity of the circumferential outer surface of the aerosol-generating product is low, and the heat loss of the heating element 22 is greater. Although it is helpful to heat the aerosol-generating product, it will increase The power consumption of the heating element 22.

In some embodiments, referring to FIG. 7 , the airflow heating assembly 20 further includes a first thermal insulation member 23 . The first heat insulating member 23 is disposed in the first installation area 216. When the air guide element 21 covered with the first heat insulating member 23 is installed on the inner tube portion 12 of the insulation assembly 10, the inner and outer sides of the first heat insulating member 23 The two sides are in contact with the inner surfaces of the air guide element 21 and the inner tube part 12 respectively. Under the action of friction between the first heat insulator 23 and the inner tube part 12, the air guide element 21 is fixed to the inner tube part 12.

In the embodiment of the present application, the first heat insulating member 23 is made of ZrO2 (zirconium dioxide) material and its compounds. The first heat insulating member 23 at least has the characteristics of high temperature resistance, low thermal conductivity and corrosion resistance. In some other embodiments, the first heat insulating member 23 may also be made of metal and/or non-metal and compound heat insulating materials.

When only the first mounting area 216 is provided with the first protrusion 2161 , the first mounting area 216 of the air guide element 21 contacts the inner surface of the first heat insulating member 23 to form line contact or point contact, thereby reducing the contact area. , at this time, the heat transferred by the air guide element 21 directly to the first heat insulating member 23 is less than the heat transferred by the first installation area 216 directly contacting the inner surface of the first heat insulating member 23, which can effectively reduce The heat of the air guide element 21 is dissipated, thereby improving thermal efficiency.

In some embodiments, the outer surface of the first heat insulating member 23 may also be provided with a first protrusion 2161 , so that when the outer surface of the first heat insulating member 23 abuts against the inner surface of the inner tube portion 12 , a line is formed. Contact or point contact reduces the contact area. Compared with the solution in which the first protrusion 2161 is only provided in the first installation area 216, the first protrusion 2161 is also provided on the outer surface of the first heat insulator 23. This further reduces the heat dissipation of the air guide element 21 . Of course, the solution of only providing the first protrusion 2161 on the outer surface of the first heat insulating member 23 is also within the protection scope of the present application. In some embodiments, the first protrusions 2161 can be directly disposed on the inner and outer surfaces of the first heat insulating member 23 to facilitate manufacturing the first heat insulating member 23 .

In the embodiment of the present application, the first heat insulation component 23 includes a first split component 231 and a second split component 232 . The first split piece 231 covers part of the first installation area 216, and the second split piece 232 covers part of the first installation area 216. The first split piece 231 and the second split piece 232 are assembled and used to install the air guide. The cavity of element 21. Of course, the first separate piece 231 and the second separate piece 232 may not completely cover the first installation area 216 after being spliced, but may partially cover the first installation area 216 . The main purpose of providing the first split piece 231 and the second split piece 232 is to facilitate the installation and removal of the first heat insulation piece 23 and the air guide element 21 . It is worth noting that in other embodiments, the first heat insulating component 23 can be divided into three or more separate components.

In order to make it easier for readers to understand the technical effects brought by the technical solutions of the embodiments of the present application, the working principle of the heating device 100 is briefly described below.

When the aerosol-generating product 2000 is received in the receiving cavity 11 of the heat preservation component 10 , part of the circumferential outer surface of the aerosol-generating product 2000 is close to the inner surface of the inner tube portion 12 . When the external power supply supplies power to the heating element 22, the heating element 22 heats the air guide element 21 or the air guide element 21 self-heats to generate heat under the action of the heating element 22, and the airflow flowing through the conductor channel of the air guide element 21 is heated. , the heated airflow enters the interior of the aerosol-generating product 2000 from the air inlet end of the aerosol-generating product 2000 for heating. At the same time, the inner tube portion 12 of the insulation component 10 is heated by the heating component and has a certain amount of heat. Due to the aerosol generation Part of the circumferential outer surface of the product 2000 is close to the inner surface of the inner tube part 12. Therefore, the heat of the inner tube part 12 can be transferred to part of the circumferential outer surface of the aerosol-generating product 2000, assisting the aerosol-generating product 2000. Heating so that the aerosol-generating article 2000 is heated more uniformly.

The heating device 100 in the embodiment of the present application includes a heat preservation component 10 and an airflow heating component 20. The heat preservation component 10 is provided with a receiving cavity 11. The receiving cavity 11 is used to accommodate the aerosol-generating product 2000. The airflow heating component 20 is disposed in the receiving cavity 11. The airflow heating assembly 20 is used to heat the gas flowing through the airflow heating assembly 20, so that the heated gas heats the aerosol-generating product 2000 placed in the receiving chamber 11. When the aerosol-generating product 2000 is placed in the receiving chamber 11 , the inner surface of the thermal insulation component 10 is close to the circumferential outer surface of the aerosol-generating product 2000, and the heat from the inner wall surface of the thermal insulation component 10 can be transferred to the circumferential outer surface of the aerosol-generating product 2000 for auxiliary heating, effectively Utilizes the heat of the insulation component 10 to The axial outer surface of the sol-generating article 2000 is heated, and the parts of the heating device 100 are reduced.

Based on the same inventive concept, please refer to Figure 14. This application also provides an aerosol generating device 1000, which includes a housing 200, a circuit device 300, a sheath 400 and the above-mentioned heating device 100. The sheath 400 is placed on the outside of the heating device 100, and the sheath 400 is used to accommodate and support the heating device 100. The circuit device 300, the sheath 400 and the heating device 100 are all housed in the casing 200. The circuit device 300 is electrically connected to the heating device 100. The circuit device 300 is used to provide electrical energy to the heating device 100 so that the heating device 100 can heat the aerosol to generate Products 2000. The housing 200 is used to accommodate and secure the circuit device 300 and the sheath 400 .

Regarding the above-mentioned housing 200, please refer to FIG. 15. The housing 200 is provided with a receiving space 201, a first insertion interface 202, a partition 203 and a fourth through hole 204. The partition 203 is disposed in the receiving space 201, and the partition 203 divides the receiving space 201 into a first cavity 2011 and a second cavity 2012 distributed up and down. The first cavity 2011 is used to receive the sheath 400 and parts of the heating device 100 and the circuit device 300 . The second cavity 2012 is used to receive a portion of the circuit device 300 . The first plug-in interface 202 is provided on the side wall of the housing 200 and connects the first cavity 2011 with the outside world, and the first plug-in interface 202 is connected with the receiving cavity 11 of the heat preservation component 10 in the heating device 100. An insertion interface 202 is used for the external aerosol-generating product 2000 to be inserted into or pulled out of the receiving cavity 11 of the heat preservation component 10 in the heating device 100 . In some embodiments, a sealing process is performed between the first cavity 2011 and the second cavity 2012 to improve the airtightness of the second cavity 2012 and reduce the risk of the circuit device 300 contained in the second cavity 2012 being exposed to the outside world. Or the possibility that the gas of the heating device 100 affects the working performance. The fourth through hole 204 is provided on the side wall of the housing 200 . The fourth through hole 204 connects the first cavity 2011 to the outside world. The fourth through hole 204 is used to expose part of the circuit device 300 so that the external power supply can communicate with the circuit device 300 Make electrical connections. The fourth through hole 204 is also used to allow external air to enter the first cavity 2011 and thereby enter the heating device 100 to be heated.

For the above-mentioned circuit device 300, please refer to FIGS. 14 and 15. The circuit device 300 includes a PCB circuit board 301, a battery module 302 and a charging interface 303. The PCB circuit board 301 and the charging interface 303 are both disposed in the first cavity 2011, and the charging interface 303 is exposed at the fourth through hole 204. The battery module 302 is disposed in the second cavity 2012. PCB circuit board 301 They are electrically connected to the heating element 22, temperature measuring element 30, battery module 302 and charging interface 303 in the heating device 100 respectively. The PCB circuit board 301 is used for parameter control and data collection of the heating element 22 and the temperature measuring element 30. The battery The module 302 is used to provide electric energy to the heating element 22 and the temperature measuring element 30, and the charging interface 303 is used to be plugged into an external power connector to charge the battery module 302 or directly use an external power source to charge the heating element 22 and measure the temperature. Element 30 provides electrical energy.

In some embodiments, the charging interface 303 may not be provided, and the battery module 302 may use a removable lithium battery or the like. In some embodiments, the number of PCB circuit boards 301 is two or more, two or more PCB circuit boards 301 are stacked in parallel and arranged in the first cavity 2011, and the PCB circuit boards 301 and the sheath 400 are in The first cavity 2011 is distributed left and right, so that the layout of the PCB circuit board 301 and the sheath 400 is more reasonable.

In some embodiments, the first cavity 2011 and the second cavity 2012 can be sealed according to actual needs to prevent the gas guide element 21 in the first cavity 2011 from heating the aerosol-generating article 2000 to generate gas. Entering the second cavity 2012 affects the working performance of the battery module 302 .

For the above-mentioned sheath 400, please refer to Figures 14 to 16. The sheath 400 includes an upper housing 402 and a lower housing 403. The upper housing 402 and the lower housing 403 together enclose a first installation cavity 401. The installation cavity 401 is used to accommodate the heating device 100 and for the aerosol-generating product 2000 to be plugged in. The end of the upper housing 402 facing away from the lower housing 403 is also provided with a second plug-in interface 4021. The second plug-in interface 4021 connects the first installation cavity 401 with the outside world, and the second plug-in interface 4021 is directly connected with the first plug-in interface 202. This allows the external aerosol-generating product 2000 to enter the first installation cavity 401 through the first insertion port 202 and the second insertion port 4021, and thereby enter the receiving cavity 11 of the heat preservation component 10 in the heating device 100.

The inner surface of the first installation cavity 401 is provided with a first convex rib 4011, a step surface 4012 and a second convex rib 4013. The number of the first protruding ribs 4011 is at least one. The at least one first protruding rib 4011 extends from the second insertion port 4021 toward the bottom of the first installation cavity 401. The first protruding ribs 4011 are used for inserting the first protruding ribs 4011 into the first mounting cavity 401. The outer surface of the aerosol-generating product 2000 in the cavity 401 is in contact, and the first rib 4011 lifts the aerosol-generating product 2000 relative to the inner surface of the first installation cavity 401 to form an air guide groove, which is used to provide external air. The gas enters the first installation cavity 401. No. A convex rib 4011 is also used to contact the outer surface of the outer tube part 13 of the thermal insulation component 10. The first convex rib 4011 lifts the thermal insulation component 10 relative to the inner surface of the first installation cavity 401 and also forms an air guide groove. This allows the outside gas to smoothly enter the bottom of the first installation cavity 401 .

The step surface 4012 is provided on the inner surface of the first installation cavity 401. The step surface 4012 is used to contact one end of the insulation component 10 in the heating device 100. The step surface 4012 and the bottom of the first installation cavity 401 jointly connect the insulation component 10 Fixed in the first installation cavity 401. Of course, an air guide groove is still formed at the contact point between one end of the insulation component 10 and the step surface 4012 . The second convex rib 4013 is provided at the bottom of the first installation cavity 401. The second convex rib 4013 raises the other end of the insulation component 10 relative to the cavity bottom to form an air guide groove, thereby allowing the air to enter the first installation cavity 401. The gas at the bottom of the cavity can enter the gas guide element 21 to complete heating.

The lower housing 403 is provided with a second installation cavity 4031 and a first through hole 4032. The second installation cavity 4031 is provided outside the lower housing 403. The first through hole 4032 penetrates the side wall of the lower housing 403 to penetrate the first installation cavity 401 and the second installation cavity 4031. The second installation cavity 4031 is used for receiving PCB circuit board 301, the first through hole 4032 is used for the cables connecting the PCB circuit board 301 and the heating element 22 and the temperature measuring element 30 in the heating device 100 to pass through, and/or for external air to pass through the fourth through hole 204 After entering the second installation cavity 4031, it then enters the bottom of the first installation cavity 401 from the second installation cavity 4031 to enter the air guide element 21 to complete being heated.

In some embodiments, the upper housing 402 and the lower housing 403 may be integrally formed.

In some embodiments, please refer to Figures 17 and 18. The aerosol generation device 1000 also includes an end cover 500. The end cover 500 is disposed at the bottom of the first installation cavity 401, and both ends of the end cover 500 are connected to the heating device respectively. The air guide element 21 of 100 is in contact with the second rib 4013. The end cover 500 is made of a material with low thermal conductivity. The end cover 500 is used to prevent the air guide element 21 from directly contacting the bottom of the first installation cavity 401 and transferring heat to the lower housing 403 too quickly. The end cover 500 is provided with a second through hole 501 and a third rib 502. The second through hole 501 is used to allow the gas at the bottom of the cavity to circulate to the gas conductor 21, and to connect the PCB circuit board 301 and the heating element in the heating device 100. 22 and the cables of the temperature measuring element 30 pass through.

In some embodiments, please refer to FIGS. 17 and 19 , the aerosol generating device 1000 further includes a second heat insulator 600 , the second heat insulator 600 is disposed on the side of the end cover 500 facing the heating device 100 , that is, the second heat insulator 600 . The two heat insulators 600 are located between the air guide element 21 and the end cover 500 . Second compartment The thermal component 600 is made of a material with low thermal conductivity. The second thermal insulation component 600 is used to reduce the heat transfer from the air guide element 21 to the end cover 500 . The second thermal insulation component 600 is provided with a third through hole 601 and a fourth protrusion. The rib 602 and the third through hole 601 are used for gas circulation and for the cables connecting the PCB circuit board 301 and the heating element 22 and the temperature measuring element 30 in the heating device 100 to pass through. The third rib 502 is connected to the second spacer. The thermal component 600 forms a point contact, and the fourth convex rib 602 is provided at one end of the second heat insulating component 600 close to the air guide element 21 . The fourth convex rib 602 is used to form point contact with the air guide element 21 .

In the embodiment of the present application, double heat insulation is performed by arranging the second heat insulator 600 and the end cover 500 between the air guide element 21 and the bottom of the first installation cavity 401, and the second heat insulator 600 is connected with the air guide element 21. The element 21 and the end cover 500, as well as the end cover 500 and the bottom of the cavity, all adopt a point contact connection method, which effectively reduces the heat directly transferred from the air guide element 21 to the lower shell 403. On the one hand, it can enable the sheath 400 to operate in a relatively long time. Working in a low temperature environment effectively extends the service life of the sheath 400. On the other hand, it can effectively reduce the heat loss of the air guide element 21 and improve the thermal efficiency of the air guide element 21. It can be understood that in some embodiments, the second heat insulating member 600 and the end cover 500 may be integrally formed.

In the embodiment of the present application, the second heat insulation member 600 and the end cover 500 are made of ZrO2 (zirconia) material and its compounds. The second heat insulation member 600 and the end cover 500 at least have high temperature resistance and low thermal conductivity. and corrosion-resistant properties. In some other embodiments, the second thermal insulation member 600 and/or the end cap 500 may also be made of metal and/or non-metallic and compound thermal insulation materials to reduce production costs.

Based on the same inventive concept, this application also provides an embodiment of an aerosol generation system 10000. Please refer to Figures 14 and 20. The aerosol generation system 10000 includes an aerosol generation article 2000 and the above-mentioned aerosol generation device 1000. The aerosol generating device 1000 is used for plugging in the aerosol generating product 2000. The aerosol generating device 1000 heats the aerosol generating product 2000 to generate smoke for the user to inhale. The aerosol-generating article 2000 at least includes a tobacco section 2001, a cooling section 2002, and a cigarette holder section 2003. The tobacco section 2001, the cooling section 2002, and the cigarette holder section 2003 are connected in sequence, and when the aerosol-generating article 2000 is inserted into the heat preservation component 10 When the tobacco segment 2001 is inserted into the cavity 11, the axial length L2 of the tobacco segment 2001 is equal to or slightly larger than the length L3 of the tobacco segment 2001 inserted into the receiving cavity 11 to ensure that the cooling segment 2002 will not be heated by the inner tube portion 12 of the insulation assembly 10, thereby affecting Cooling performance of cooling section 2002. That Among them, the axial length L2 of the tobacco segment 2001 is slightly larger than the length L3 of the tobacco segment 2001 inserted into the receiving cavity 11. This refers to the difference between the axial length L2 of the tobacco segment 2001 and the length L3 of the tobacco segment 2001 inserted into the receiving cavity 11. The value is 0.5mm≤L2-L3≤2mm. It can be understood that the aerosol-generating article 2000 may also include other sections, such as a filter section, an essential oil section, a filter section, etc.

Embodiment 2

Please mainly refer to Figure 21. The heating device 100a includes a tubular body 10a, an airflow channel 30a and an airflow heating component 20a. The tubular body 10a has an accommodating cavity inside, which is used to receive at least part of the aerosol-generating product 2000. The air flow channel 30a is in fluid communication with the accommodating cavity, and air enters the accommodating cavity through the air flow channel.

In one example, as shown in FIG. 21 , air enters the accommodation cavity from the distal end of the accommodation cavity; it can be understood that in other examples, air can also enter the accommodation cavity from the middle area of the accommodation cavity.

In an example, at least part of the airflow channel 30a is located inside the tubular body 10a, the airflow heating assembly 20a is disposed in the airflow channel 30a, and the air flowing through the airflow channel 30a flows through the airflow heating assembly 20a, so that the airflow heating assembly 20a can heat Air flowing through the airflow channel 30a; in other examples, the airflow channel is located outside the tubular body, at least a portion of the airflow channel may be defined by an airway tube, the airflow heating component may be located within the airflow channel, or the airflow heating component may surround the airflow channel. Pipe setting.

The airflow heating assembly 20a is configured to heat the air flowing through the airflow channel 30a into a hot airflow. The hot airflow can flow into the interior of the aerosol-generating article 2000 from the far end of the aerosol-generating article 2000 to heat the airflow in the aerosol-generating article 2000. Tobacco segments generate aerosols. Of course, it is not excluded that in other embodiments, the hot air flow can flow into the interior of the aerosol-generating article 2000 from the side wall of the aerosol-generating article 2000 .

One end of the tubular body 10a is provided with a first opening 111a, and at least part of the aerosol-generating product 2000 is inserted into the accommodation cavity through the first opening 111a. The end of the tubular body with the first opening is defined as the proximal end m1 of the heating device. , the distal end m2 and the proximal end m1 of the heating device are arranged oppositely. It can be understood that other components such as the airflow heating component, the proximal end m1 and the distal end m2 of the airflow channel may also refer to the above definition.

For the above-mentioned tubular body 10a, the accommodation cavity therein includes a first accommodation cavity 114a and a second accommodation cavity 115a. Along the flow direction of the airflow in the accommodating cavity, the first accommodating cavity 114a is located downstream of the second accommodating cavity 115a; with the proximal end of the tubular body 10a as a reference point, the second accommodating cavity 115a is arranged adjacent to the distal end of the first accommodating cavity 114a . Both the first accommodation cavity 114a and the second accommodation cavity 115a are capable of accommodating part of the aerosol-generating article 2000, wherein the accommodation inner diameter of the second accommodation cavity 115a is greater than the accommodation radius of the first accommodation cavity 114a. Since the second accommodation chamber 115a is located upstream of the first accommodation chamber 114a, the hot air flows through the aerosol-generating article 2000 located in the second accommodation chamber 115a and then flows into the aerosol-generating article 2000 located in the first accommodation chamber 114a, so that the tubular body The temperature of the wall delimiting the second receiving chamber 115a in the tubular body 10a is higher than the temperature of the wall delimiting the first receiving chamber 114a in the tubular body 10a.

In one example, the tubular body is not an integrally formed tube, and the wall defining the first accommodation chamber and the wall defining the second accommodation chamber in the tubular body are connected through assembly. In one example, the wall defining the first receiving chamber and the wall defining the second receiving chamber in the tubular body are made of different materials.

In the embodiment shown in Figures 21 and 22, the tubular body 10a includes a first tubular body 11a.

In an example, the first tubular body 11a contains a thermal insulation material, so that the first tubular body 11a has a thermal insulation effect. The thermal insulation material means that the thermal conductivity of the material is less than 100W/m.K at 23°C and a relative humidity of 50%. , preferably less than 40W/m.K or less than 10W/m.K. For example, the thermal insulation material may include at least one of PAEK materials, PI materials or PBI materials, where the PAEK materials include glass fiber, glass mat, ceramics, silica, alumina, PEEK, PEKK, PEKEKK Or PEK material. Among them, PAEK materials include PEEK, PEKK, PEKEKK or PEK materials.

In one example, the first tubular body 11a includes a heat insulating material surrounding the periphery of the first tubular body 11a.

In an example, please refer mainly to FIGS. 21 and 22 , the tubular body 10a further includes a second tubular body 12a. The second tubular body 12a is disposed on the periphery of the first tubular body 11a, and the first tubular body 11a is connected with the second tubular body 11a. A cavity 13a is formed between the bodies 12a. The first tubular body 11a is used to receive and secure at least part of the aerosol-generating article, and the cavity 13a is used to reduce heat transfer from the first tubular body 11a to the second tubular body 12a. The cavity 13a can form a negative pressure heat insulation layer or a gas heat insulation layer, that is, the cavity 13a is in a vacuum negative pressure state, or is filled with gas. In other words, The air pressure in the cavity 13a can be less than or equal to the external atmospheric pressure, or can be less than or equal to a standard atmospheric pressure; the gas filled in the cavity 13a can be a certain gas, for example, it can be pure carbon dioxide, pure nitrogen or pure argon, etc. ; The gas filled in the cavity 13a may be a mixed gas composed of multiple gases; the gas filled in the cavity 13a may be air. Of course, in other embodiments, the cavity 13a can also be filled with thermal insulation material. In this example, the first tubular body 11a may contain metal.

The first tubular body 11a includes a first part 112a and a second part 113a. The first part 112a encloses and defines a first accommodation cavity 114a. The first part 112a is also provided with a first opening 111a. The first opening 111a communicates the first accommodation cavity 114a with the outside world. The second part 113a encloses and defines a second accommodation cavity 115a. The first accommodation cavity 114a and the second accommodation cavity 115a are in airflow communication. The aerosol-generating product is inserted into the first accommodation cavity 114a and the second accommodation cavity 115a from the first opening 111a. . Since the second accommodation chamber 115a is located upstream of the first accommodation chamber 114a according to the flow direction of the hot gas flow, the temperature of the second part 113a may be higher than the temperature of the first part 112a. The inner diameter of the second part 113a is larger than the inner diameter of the first part 112a, so that there is a gap between the outer peripheral surface of the aerosol-generating article 2000 and the second part 113a, and the gap prevents the second part 113a from transmitting heat to the aerosol-generating article 2000. , helps to increase the thermal resistance between the second part 113a and the aerosol-generating article 2000, and prevents the aerosol-generating article 2000 contained in the second accommodation cavity 115a from being carbonized or burned due to overheating. The first part 112a can be attached to the outer peripheral surface of the aerosol-generating article 2000 to clamp the aerosol-generating article 2000, thereby helping to keep the aerosol-generating article 2000 inside the tubular body 10a.

In addition, the gap between the aerosol-generating article and the second part 113a can be filled by hot air entering the second accommodation cavity 115a, which helps the aerosol-generating article 2000 located in the second accommodation cavity 115a to be heated more uniformly, and Helps improve the quality of the aerosol generated.

In one embodiment, the tubular body 10a or the first tubular body 11a includes a heating part, which may be an electric heating part. For example, the heating part includes a resistive material, and the resistive material can generate Joule heat when energized, or, for example, The inner part contains an infrared coating, which can radiate infrared rays to the accommodation cavity when energized. The heating part enables the tubular body 10a or the first tubular body 11a to generate heat, so that the tubular body 10a or the first tubular body 11a can interact with the airflow heating assembly 20a. Cooperate with each other to jointly heat the aerosol-generating product 2000 contained in the containing cavity. Under the action of the hot air flow, the temperature of the second accommodation chamber 115a is higher than the temperature of the first accommodation chamber 114a. Therefore, in order to prevent the aerosol-generating product 2000 located in the second accommodation chamber 115a from overheating, the second accommodation chamber 115a is designed. The accommodating inner diameter is larger than the accommodating inner diameter of the first accommodating cavity 114a, which can prevent the aerosol-generating article 2000 from contacting the cavity wall of the second accommodating cavity 115a, and prevent the aerosol-generating article 2000 from being locally overheated.

Please mainly refer to Figure 22. Along the length direction of the tubular body 10a, the extension length L4 of the second accommodation cavity 115a satisfies: 2mm≤L4≤3mm. For example, the extension length L4 of the second accommodation cavity 115a may be 2.3 mm, 2.5 mm, 2.8 mm, etc. The difference between the inner diameter D2 of the second part 113a and the inner diameter D1 of the first part 112a satisfies: 0.6mm≤D2-D1≤1mm.

In some embodiments, please refer mainly to Figures 22 and 23, the outer diameters of the first part 112a and the second part 113a are the same, that is, the wall thickness of the first tubular body 11a at the first part 112a and the second part 113a is different, The second part 113a having a thinner wall thickness than the first part 112a may be formed by processing a groove on the inner wall of the first tubular body 11a.

In other embodiments, the wall thickness of the first part 112a and the second part 113a is the same, and the first tubular body 11a can be partially formed through a shaping process to form a shape opposite to the first part 112a along the radial direction of the first tubular body 11a. The second portion 113a is arched outward, or forms a first portion 112a that is tightened inward relative to the second portion 113a in the radial direction of the first tubular body 11a. In this example, the first tubular body 11a can be made of metal. , thereby facilitating the punching process of the first tubular body 11a, such as punching outward to form an outwardly arched second portion 113a, or punching inward to form an inwardly tightened first portion 112a.

It should be noted that the first tubular body 11a and the second tubular body 12a can also be formed by other suitable processes such as injection molding and casting.

It should be noted that the second tubular body 12a can also be made of metal, so that the proximal end of the first tubular body 11a and the proximal end of the second tubular body 12a can be connected by welding, and the distal end of the first tubular body 11a and The distal end of the second tubular body 12a can also be connected by welding, which helps to form a sealed cavity 13a between the first tubular body 11a and the second tubular body 12a.

In some embodiments, please refer mainly to FIGS. 21 and 22 , the inner wall surface of the tubular body 10a is also provided with a second protrusion 14a, and the second protrusion 14a is located between the airflow heating assembly 20a and the second housing. between the cavities 115a, and the proximal end of the airflow heating component 20a is in contact with the second protrusion 14a, so as to facilitate the fixed installation of the airflow heating component 20a inside the tubular body 10a. The minimum inner diameter of the second protrusion 14a is greater than or equal to the inner diameter of the first accommodation cavity 114a. Since the second protrusion 14a can be a continuous annular second protrusion 14a, or can be a circumferentially spaced protrusion, therefore, the minimum inner diameter of the second protrusion 14a only needs to be greater than or equal to the inner diameter of the first accommodation cavity 114a. That’s it. When the minimum inner diameter of the second protrusion 14a is equal to the accommodation inner diameter of the first accommodation cavity 114a, the second protrusion 14a forms a line contact with the outer peripheral surface of the end of the aerosol-generating product. Compared with surface contact, the line contact design can The heat transferred directly from the second convex portion 14a to the end of the aerosol-generating product is effectively reduced. When the minimum inner diameter of the second protrusion 14a is larger than the accommodation inner diameter of the first accommodation cavity 114a, the second protrusion 14a does not come into contact with the end of the aerosol-generating product, and the direct air flow from the second protrusion 14a can be further reduced. The sol generates heat transferred from the end of the article.

For the above-mentioned airflow heating assembly 20a, please mainly refer to Figure 21. The airflow heating assembly 20a includes a third heat insulating member 21a and an airflow heating member 22a. The third heat insulating member 21a is disposed at the proximal end of the airflow heating member 22a, and the third heat insulating member 21a is disposed at the proximal end of the airflow heating member 22a. The proximal end of the heat insulator 21a is in contact with the second convex portion 14a. The airflow heating element 22a is configured to heat the air in the airflow channel 30a to form a hot airflow, and the third heat insulating element 21a is used to reduce the heat directly transferred by the airflow heating element 22a to the tubular body 10a.

In some embodiments, please refer mainly to FIG. 24 , in order to better support the end of the aerosol-generating article so that the end of the aerosol-generating article is located in the second containing cavity 115 a, the third heat insulating member 21 a is close to The end is also provided with a support part 211a. The number of the support part 211a may be one or multiple. The plurality of support parts 211a are spaced apart so that the hot air flow can flow to the aerosol-generating product through the gaps between the support parts 211a. The ends are heated. It can be understood that the third heat insulating member 21a may be made of heat insulating material, for example, the third heat insulating member 21a may be ceramic.

The heating device 100a of the present application includes a tubular body 10a, an airflow channel 30a and an airflow heating component 20a. The proximal end of the tubular body 10a is provided with a first opening 111a into which the aerosol-generating product 2000 is inserted. A first accommodation chamber 114a and a second accommodation chamber 114a for accommodating part of the aerosol-generating product 2000 are defined in the tubular body 10a from near to far. The accommodating cavity 115a, the accommodating inner diameter of the second accommodating cavity 115a is larger than the accommodating inner diameter of the first accommodating cavity 114a; the air flow channel 30a is used for air supply The air enters the second accommodation cavity 115a, and the airflow heating assembly 20a is configured to heat the air in the airflow channel 30a. By arranging the structure such that the inner diameter of the second accommodating cavity 115a is larger than the inner diameter of the first accommodating cavity 114a, the end of the aerosol-generating article 2000 inserted into the second accommodating cavity 115a is not in direct contact with the tubular body 10a. The end of the aerosol-generating product 2000 is directly heated by hot air to make the heating effect more uniform, avoid local overheating and smoke burning at the end of the aerosol-generating product 2000, and effectively improve the generated aerosol. Sol quality.

This application also provides an embodiment of an aerosol generating device. The aerosol generating device includes the above-mentioned heating device 100a and a power supply component. For the specific structure and function of the heating device 100a, please refer to the above embodiments and will not be described again here. The power supply component may include any power supply that can provide electric energy for heating the heating device 100a. The power supply may be any suitable battery core. The power supply component may also include a control board. The power supply may be electrically connected to the heating device 100a through the control board. The control board may control the gas. The operation of the sol generating device includes, but is not limited to, controlling the heating power, heating current or heating voltage of the heating device 100a.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application, but not to limit it; under the idea of the present application, the technical features of the above embodiments or different embodiments can also be combined. The steps may be performed in any order, and there are many other variations of different aspects of the application as described above, which are not provided in detail for the sake of brevity; although the application has been described in detail with reference to the foregoing embodiments, one of ordinary skill in the art Skilled persons should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not deviate from the essence of the corresponding technical solutions from the implementation of the present application. Example scope of technical solutions.

Claims (50)

1. A heating device for heating aerosol-generating products, characterized in that it includes:

   Thermal insulation component, the thermal insulation component includes an inner tube part and an outer tube part, a receiving cavity is provided inside the inner tube part, the outer tube part is arranged around the inner tube part, the outer tube part and the inner tube part are There is a cavity enclosed between the tube parts, and the receiving cavity is used to accommodate the aerosol-generating product;

   Air flow heating assembly, the air flow heating assembly is arranged in the receiving cavity, and the air flow heating assembly is used to heat the gas flowing through the air flow heating assembly, so that the heated gas is heated to the gas placed in the receiving cavity. The aerosol-generating article is heated.
2. The heating device according to claim 1, characterized in that:

   The interior of the cavity is vacuum or filled with a medium with low thermal conductivity.
3. The heating device according to claim 1, characterized in that:

   The air flow heating assembly includes an air guide element and a heating element. The air guide element is provided with a plurality of through air guide channels. The heating element is used to heat the air guide element, or the air guide element is in Self-heating occurs under the action of the heating element.
4. The heating device according to claim 3, characterized in that:

   The heating element is a heating element;

   The air guide element is provided with a first installation slot, and the first installation slot is used to install the heating element.
5. The heating device according to claim 4, characterized in that:

   The first mounting groove is located in the center of the air guide element.
6. The heating device according to claim 4 or 5, characterized in that,

   The heating element is spirally formed by a heating wire; or

   The heating element has a ventilation air gap.
7. The heating device according to claim 3, characterized in that:

   The heating element is a metal heating mesh or FPC heating film.
8. The heating device according to claim 3, characterized in that:

   The heating element includes a resistance heating element, a first insulating layer and a second insulating layer;

   The resistance heating element is arranged around the outer peripheral surface of the air guide element;

   Wherein, the first insulating layer is disposed between the air conductive element and the resistance heating element, and the second insulating layer is disposed between the resistance heating element and the inner surface of the heat preservation component.
9. The heating device according to claim 3, characterized in that:

   The heating element includes an induction coil, the induction coil is electrically connected to an external power source, and the induction coil is sleeved on the outer peripheral surface of the air guide element.
10. The heating device according to claim 9, characterized in that:

    The heating element further includes a bracket, the induction coil is wound around the bracket, and the bracket is sleeved on the outer peripheral surface of the air guide element.
11. The heating device according to claim 10, characterized in that:

    The heating element also includes a magnetic field shield disposed between the induction coil and the inner tube portion.
12. The heating device according to claim 3, characterized in that:

    The heating element is a heating circuit coating. The heating circuit coating is coated on the inner wall surface of the inner tube part. The heating circuit coating is electrically connected to an external power source.
13. The heating device according to claim 1, characterized in that:

    The receiving cavity includes a first chamber and a second chamber connected along a first direction, and the first chamber The chamber is used to install the airflow heating component, and the second chamber is used to install the aerosol-generating article; wherein the cross-sectional area of the first chamber is larger than the cross-sectional area of the second chamber. , wherein the cross-section of the first chamber and the cross-section of the second chamber are both perpendicular to the first direction.
14. The heating device according to claim 3, characterized in that:

    The circumferential outer surface of the air guide element is provided with a first installation area and a second installation area, and the first installation area is used to connect with the inner surface of the inner tube part so that the air guide element is fixed to the For the inner tube part, the second mounting area is not connected to the inner surface of the inner tube part.
15. The heating device according to claim 14, characterized in that:

    The airflow heating assembly also includes a first heat insulating piece, which is disposed in the first installation area. The first heat insulating piece is in contact with the air guide element and the inner tube part respectively. catch.
16. The heating device according to claim 15, characterized in that:

    The first heat insulating member is provided with a first convex portion on its outer surface facing away from the air guide element, and the first convex portion abuts against the inner surface of the inner tube portion to form line contact or point contact; or

    The outer surface of the air guide element is provided with a first convex portion, and the first convex portion abuts against the inner surface of the first heat insulating member to form line contact or point contact.
17. The heating device according to claim 15 or 16, characterized in that:

    The first thermal insulation component includes a first split component and a second split component;

    Wherein, the first split part covers part of the first installation area, and the second split part covers part of the first installation area; or the first split part and the second split part are combined together. into a cavity for installing the air guide element.
18. The heating device according to any one of claims 3 or 7 or 9 or 14, characterized in that,

    The gas conducting element is made of graphite or graphite alloy.
19. The heating device according to claim 3, characterized in that:

    The heating device also includes a temperature measuring element;

    The gas guide element includes a second installation slot, and the second installation slot is used to place the temperature measuring element;

    The second mounting groove is located at the center of the cross-section of the air-guiding element, and the cross-section of the air-guiding element is perpendicular to the center line of the air-guiding element.
20. The heating device according to claim 19, characterized in that:

    The air guide element includes a first air guide block and a second air guide block. The first air guide block is provided with a first groove, and the second air guide block is provided with a second groove. When the third air guide block When an air guide block and the second air guide block are spliced, the first groove and the second groove together enclose the second installation groove.
21. The heating device according to claim 1, characterized in that:

    The heat preservation component includes a contact piece, which is disposed on the inner surface of the receiving cavity, and is connected to the airflow heating component.
22. A heating device for heating aerosol-generating products, characterized in that it includes:

    The thermal insulation component is provided with a receiving cavity, and the receiving cavity is used to accommodate the aerosol-generating product. When the aerosol-generating product is placed in the receiving cavity, the inner surface of the thermal insulation component is in contact with the surrounding surface of the aerosol-generating product. Close fit toward outer surface;

    An airflow heating assembly is disposed in the receiving cavity. The airflow heating assembly is used to heat the gas flowing through the airflow heating assembly, so that the heated gas acts on the aerosol-generating product placed in the receiving cavity. heating.
23. The heating device according to claim 22, characterized in that:

    The insulation component includes an inner tube part and an outer tube part. The inside of the inner tube part is provided with the receiving cavity. The outer tube part is arranged around the inner tube part. The outer tube part and the inner tube between departments They are collectively enclosed by a closed cavity, and the closed cavity is internally vacuumed or filled with an inert gas with low thermal conductivity.
24. A heating device for heating aerosol-generating products, characterized in that it includes: a heat preservation component and an airflow heating component;

    The insulation component includes an inner tube part and an outer tube part. A receiving chamber is provided inside the inner tube part. The outer tube part is arranged around the inner tube part. The receiving chamber is used to accommodate aerosol-generating products. The airflow heating component is disposed in the receiving cavity. The airflow heating component is used to heat the gas flowing through the airflow heating component, so that the heated gas reacts with the aerosol-generating product placed in the receiving cavity. to heat;

    When the heating device works normally, the insulation component meets at least one of the following conditions:

    The temperature of the inner tube part is 100°C to 150°C; and

    The temperature of the outer tube part is 40°C to 80°C.
25. The heating device according to claim 24, characterized in that:

    When the heating device works normally, the inner tube part meets at least one of the following conditions:

    The temperature of one end of the inner tube portion close to the aerosol-generating article is 100°C to 120°C; and

    The temperature of one end of the inner tube portion close to the airflow heating component is 120°C to 150°C.
26. A heating device for heating aerosol-generating products, characterized in that it includes:

    A tubular body having a first containment cavity and a second containment cavity therein, the first containment cavity and the second containment cavity being configured to contain a portion of an aerosol-generating article, wherein the second containment cavity The inner diameter of the accommodation is greater than the inner diameter of the first accommodation cavity; and

    An airflow heating assembly is configured to heat air entering the aerosol-generating article, wherein the second accommodation chamber is located upstream of the first accommodation chamber along the direction of air flow.
27. The heating device according to claim 26, characterized in that:

    Along the length direction of the tubular body, the extension length L4 of the second accommodation cavity satisfies: 2mm≤L4≤3mm.
28. The heating device according to claim 26, characterized in that:

    The tubular body includes a first tubular body, the first tubular body includes a first portion bounding the first accommodation chamber and a second portion bounding the second accommodation chamber, the second portion having an inner diameter greater than The inner diameter of the first part.
29. The heating device according to claim 28, characterized in that:

    The difference between the inner diameter D2 of the second part and the inner diameter D1 of the first part satisfies: 0.6mm≤D2-D1≤1mm.
30. The heating device according to claim 28, characterized in that:

    The first part and the second part have the same outer diameter.
31. The heating device according to claim 28, characterized in that:

    The first part and the second part have the same wall thickness.
32. The heating device according to claim 28, characterized in that:

    The tubular body includes a second tubular body, and a cavity is provided between the first tubular body and the second tubular body, and the cavity forms a negative pressure heat insulation layer or a gas heat insulation layer.
33. The heating device according to claim 28, characterized in that:

    The first tubular body is made of metal.
34. The heating device according to claim 26, characterized in that:

    The airflow heating component is located inside the tubular body.
35. The heating device according to claim 32, characterized in that:

    The inner wall surface of the tubular body is also provided with a second protrusion, the second protrusion is located between the airflow heating component and the second accommodation cavity, and the proximal end of the airflow heating component is adjacent to the third Two accommodation cavities are provided and the proximal end of the airflow heating component is in contact with the second protrusion.
36. The heating device according to claim 35, characterized in that:

    The minimum inner diameter of the second protrusion is greater than or equal to the inner diameter of the first accommodation cavity.
37. The heating device according to claim 35, characterized in that:

    The airflow heating assembly includes a third heat insulating piece and an airflow heating piece. The third heat insulating piece is disposed at the proximal end of the airflow heating piece, and the third heat insulating piece abuts against the second protrusion. , wherein a support portion is provided on the third heat insulating member, and the support portion is used to abut and support the distal end of the aerosol-generating article.
38. The heating device according to claim 26, characterized in that:

    The tubular body includes a heat insulating material, or a heat insulating material is provided on the periphery of the tubular body.
39. The heating device according to claim 26, wherein the tubular body includes a heating portion.
40. An aerosol generating device, characterized in that it includes a shell, a circuit device, a sheath and a heating device as claimed in any one of claims 1 to 39, the shell being provided with a receiving space and a first plug port, so The first plug port is connected to the receiving cavity, and the receiving space is used to accommodate the circuit device, the sheath and the heating device. The sheath is set outside the heating device, and the sheath is The sheath is used to accommodate and support the heating device, the first plug port is used for external aerosol-generating products to insert or pull out the sheath and the heating device, and the circuit device is electrically connected to the heating device. , the circuit device is used to provide electrical energy to the heating device.
41. The aerosol generating device according to claim 40, characterized in that:

    The sheath is provided with a first installation cavity and a second plug-in interface connected to the first installation cavity. The first plug-in interface is connected with the second plug-in interface. The inner surface of the first installation cavity is provided with At least one first convex rib, the first convex rib is used to abut with the outer surface of the aerosol-generating article inserted into the first installation cavity, and the first convex rib is used to contact with the thermal insulation component. The outer surface is in contact with each other, and an air guide groove is formed between the first rib and the inner surface of the first installation cavity. The air guide groove is used to allow outside air to enter the first installation cavity.
42. The aerosol generating device according to claim 41, characterized in that:

    The inner surface of the first installation cavity is also provided with a step surface, the step surface is used to abut one end of the heating device, and the bottom of the first installation cavity abuts the other end of the heating device. .
43. The aerosol generating device according to claim 42, characterized in that:

    The sheath includes an upper shell and a lower shell, the upper shell and the lower shell together enclose the first installation cavity, and the first plug-in interface is provided on the upper shell away from the One end of the lower housing, the step surface is provided on the inner surface of the upper housing;

    The circuit device includes a PCB circuit board and a battery module; the PCB circuit board is electrically connected to the battery module and the heating device respectively;

    The lower housing is provided with a second installation cavity and a first through hole. The first through hole connects the first installation cavity and the second installation cavity. The second installation cavity is used for the PCB. circuit board;

    Wherein, the first through hole is used for a cable connecting the PCB circuit board and the heating device to pass through, and/or the first through hole is used for allowing outside air to enter the heating device.
44. The aerosol generating device according to claim 43, characterized in that:

    The aerosol generating device further includes an end cover, the end cover is provided at an end of the heating device facing away from the upper housing, and the end cover is provided with a second through hole;

    Wherein, the second through hole is used for gas to pass through the bottom of the first installation cavity to enter the heating device, and/or the second through hole is used for connecting the PCB circuit board and Place Pass the heating device cable through.
45. The aerosol generating device according to claim 44, characterized in that:

    The bottom of the first installation cavity is provided with a second convex rib, and the second convex rib is used to raise the end cover relative to the bottom of the first installation cavity.
46. The aerosol generating device according to claim 44 or 45, characterized in that,

    The aerosol generating device further includes a second heat insulating member, the second heat insulating member is disposed on the side of the end cover facing the heating device, the end cover is provided with a third rib, the The second heat insulating member is in contact with the third rib, and the second heat insulating member is provided with a third through hole;

    The third through hole is used for gas to pass through, and/or the third through hole is used for cables connecting the PCB circuit board and the heating device to pass through.
47. The aerosol generating device according to claim 46, characterized in that:

    A fourth convex rib is provided at one end of the second heat insulating member close to the heating device, and the fourth convex rib is used to abut against the heating device.
48. The aerosol generating device according to claim 44, characterized in that:

    The housing is provided with a partition, and the partition is used to divide the accommodation space into a first cavity and a second cavity arranged up and down, and the first cavity is used to accommodate the PCB circuit arranged left and right. plate and the sheath, and the second cavity is used to accommodate the battery module.
49. The aerosol generating device according to claim 48, characterized in that:

    The circuit device also includes a charging interface, the charging interface is provided in the first cavity, and the charging interface is electrically connected to the PCB circuit board;

    The housing is provided with a fourth through hole, the fourth through hole connects the first cavity to the outside world, and the charging interface is exposed to the fourth through hole;

    Wherein, the fourth through hole is used for external power supply to be plugged into the charging interface to charge the battery module, and/or the fourth through hole is used for external air to pass through to enter the battery module. described in the first cavity.
50. An aerosol generating system, characterized by comprising an aerosol generating product and an aerosol generating device according to any one of claims 40 to 49, the aerosol generating device being used for inserting the aerosol generating product connected, and the aerosol generating device is used to heat an aerosol generating product inserted in the receiving cavity, the aerosol generating product at least includes a tobacco section, a cooling section and a cigarette holder section, the tobacco section, the The cooling section and the mouthpiece section are connected in sequence. When the aerosol-generating product is inserted into the receiving cavity, the axial length of the tobacco section is equal to or slightly larger than the length of the tobacco section inserted into the receiving cavity. .