Aerosol-generating device

Abstract

The utility model relates to an aerosol generating device which comprises a shell, and a containing cavity used for containing at least part of aerosol generating products is formed in the shell. The shell comprises a side wall, at least one air inlet hole for external airflow to enter the containing cavity is formed in the side wall in a penetrating mode, and a plurality of air inlet grooves communicated with the at least one air inlet hole are formed in the outer surface of the side wall around the at least one air inlet hole. Under the condition that a user holds the air inlet hole of the shell, air flow can still enter from the air inlet groove and enter the containing cavity through the air inlet hole.

Description

Technical Field

[0001] The utility model relates to the technical field of aerosol generation, and more specifically, to an aerosol generating device. Background Art

[0002] Aerosol-generating devices use heat to bake aerosol-generating products without burning them, producing an aerosol for inhalation. In related art, the air inlet of aerosol-generating devices is located on the side of the device. This can easily become blocked when the user holds the device, resulting in poor air flow, increased inhalation resistance, and even impacting the device's normal operation. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide an improved aerosol generating device in view of the above-mentioned defects of the prior art, which can prevent the intake air flow from being blocked when the user holds the device.

[0004] The technical solution adopted by the present invention to solve the technical problem is as follows: constructing an aerosol generating device, comprising a housing, wherein a receiving cavity for receiving at least part of the aerosol generating product is formed;

[0005] The shell includes a side wall, and at least one air inlet hole is provided through the side wall for external air flow to enter the accommodating cavity. The outer surface of the side wall is provided with a plurality of air inlet grooves connected with the at least one air inlet hole around the at least one air inlet hole.

[0006] In some embodiments, a plurality of the air inlet holes are provided on the side wall of the housing, and the plurality of the air inlet holes are distributed in a uniform array.

[0007] In some embodiments, a portion of the outer surface of the side wall is protruded with a plurality of protrusions, and an air inlet groove is formed between every two adjacent protrusions.

[0008] In some embodiments, the plurality of air inlet grooves are formed by recessing a portion of the outer surface of the side wall.

[0009] In some embodiments, the bottom surface of each of the air inlet grooves is flush with the air inlet end surface of the air inlet hole.

[0010] In some embodiments, the plurality of air inlet slots are radially shaped.

[0011] In some embodiments, one end of each of the air inlet grooves is connected to the at least one air inlet hole, and the other end extends in a straight line away from the at least one air inlet hole.

[0012] In some embodiments, the cross-sectional area of ​​each of the air inlet grooves gradually decreases or remains unchanged in a direction approaching the at least one air inlet hole.

[0013] In some embodiments, the housing has an air inlet channel, the air inlet channel including a first air inlet channel connected to the at least one air inlet hole and a second air inlet channel connecting the first air inlet channel to the bottom of the accommodating cavity.

[0014] The central axis of the first air inlet duct is perpendicular to the central axis of the second air inlet duct, and the central axis of the second air inlet duct is coincident with or parallel to the central axis of the accommodating cavity.

[0015] A buffer cavity is provided at the intersection of the first air inlet duct and the second air inlet duct, and the bottom wall surface of the buffer cavity is lower than the bottom wall surface of the first air inlet duct.

[0016] In some embodiments, the aerosol generating device further comprises a heating tube disposed in the housing, and an inner wall surface of the heating tube defines the accommodating cavity.

[0017] In some embodiments, the heat pipe comprises:

[0018] infrared-transparent matrix tube;

[0019] a heating layer, disposed on the outer wall of the base tube, for generating infrared light waves when energized; and

[0020] A protective layer is coated on the outside of the heating layer and the base tube, and the thermal conductivity of the protective layer is lower than the thermal conductivity of the base tube.

[0021] The implementation of the present invention has at least the following beneficial effects: by providing multiple air inlet grooves on the outer surface of the side wall of the shell, when the user holds the air inlet hole of the shell, air flow can still enter from the air inlet grooves and enter the accommodating cavity through the air inlet hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0023] Figure 1 2 is a schematic diagram of the three-dimensional structure of the aerosol generating system in the first embodiment of the present utility model;

[0024] Figure 2 yes Figure 1 A schematic diagram of the longitudinal cross-sectional structure of the aerosol generating system shown;

[0025] Figure 3 yes Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 4 yes Figure 2 Schematic diagram of the three-dimensional structure of the heating component;

[0027] Figure 5 yes Figure 4 A schematic diagram of the longitudinal cross-sectional structure of the heating component shown;

[0028] Figure 6 yes Figure 4 A schematic diagram of the exploded structure of the heat generating component shown;

[0029] Figure 7 2 is a schematic diagram of the three-dimensional structure of the aerosol generating system in the second embodiment of the present invention;

[0030] Figure 8 yes Figure 7 A schematic diagram of the longitudinal cross-sectional structure of the aerosol generating system shown;

[0031] Figure 9 yes Figure 7 a partial longitudinal cross-sectional view of the aerosol generating system shown;

[0032] Figure 10 This is a schematic diagram of the three-dimensional structure of the heating pipe in some embodiments of the present invention;

[0033] Figure 11 It is a schematic diagram of the three-dimensional structure of the heating pipe in other embodiments of the present invention;

[0034] Figure 12 yes Figure 11 A schematic diagram of the longitudinal cross-sectional structure of the heating tube shown;

[0035] Figure 13 yes Figure 11 Schematic diagram of the enlarged structure at B in the middle;

[0036] Figure 14 Schematic diagram of the longitudinal cross-sectional structure of the heating tube in some other embodiments of the present invention;

[0037] Figure 15 It is a schematic diagram of the longitudinal cross-sectional structure of the heating component in some embodiments of the present invention. DETAILED DESCRIPTION

[0038] In order to provide a clearer understanding of the technical features, objectives, and effects of the present invention, a specific embodiment of the present invention will now be described in detail with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar improvements without violating the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly defined. In addition, in the present invention, unless otherwise clearly defined and defined, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0040] Figures 1 to 2 The figure shows an aerosol-generating system 300 according to a first embodiment of the present invention. The aerosol-generating system 300 may include an aerosol-generating device 100 and an aerosol-generating article 200. The aerosol-generating article 200 is pluggable into the aerosol-generating device 100, allowing for easy removal and replacement of the aerosol-generating article 200 for continued use after heating. When powered on, the aerosol-generating device 100 heats the inserted aerosol-generating article 200, releasing the aerosol extract from the aerosol-generating article 200 without burning it.

[0041] In some embodiments, the aerosol-generating article 200 may be cylindrical. Of course, in other embodiments, the aerosol-generating article 200 may also be in other cylindrical shapes, such as an elliptical cylinder or a polygonal cylinder. The aerosol-generating article 200 may include a solid material in the form of strips, sheets, or granules, made from leaves and / or stems of plants (e.g., tobacco or tea leaves), and an aroma component may be further added to the solid material.

[0042] The aerosol generating device 100 may include a housing 10 and a heating component 20, a circuit board 30, and a battery 40 disposed in the housing 10. The circuit board 30 is electrically connected to the heating component 20 and the battery 40, and is provided with a control circuit for controlling the power on and off of the heating component 20 by the battery 40.

[0043] The housing 10 includes a side wall 12 and a top wall 11 and a bottom wall 13 respectively provided at both ends of the side wall 12. The side wall 12 may be in the shape of a square cylinder. Of course, in other embodiments, it may also be in other cylindrical shapes such as a cylindrical or elliptical cylinder. The top wall 11 and the bottom wall 13 respectively cover the upper and lower openings of the side wall 12. A socket 110 is provided through the top wall 11. The heating component 20 in the housing 10 has a receiving cavity 210 for receiving at least part of the aerosol generating product 200. The aerosol generating product 200 can be at least partially inserted into the receiving cavity 210 through the socket 110 for heating.

[0044] An air intake structure is provided on the sidewall 12 of the housing 10 for allowing external airflow to enter the accommodating chamber 210. An air intake channel 2420 is formed within the housing 10, connecting the air intake structure and the accommodating chamber 210. Specifically, at least one air intake hole 122 is provided through the sidewall 12 for allowing external airflow to enter the accommodating chamber 210. A plurality of air intake grooves 121 are provided on the outer surface of the sidewall 12, surrounding the at least one air intake hole 122 and communicating with the at least one air intake hole 122. These plurality of air intake grooves 121 prevent blockage of the incoming airflow. Even when a user grasps the air intake structure of the housing 10, air can still enter through at least one of the air intake grooves 121 and enter the air intake channel 2420 through the air intake hole 122. Here, the outer surface of the sidewall 12 refers to the surface of the sidewall 12 exposed to the outside air, or the surface of the sidewall 12 away from the central axis of the housing 10.

[0045] When the aerosol generating product 200 is inserted into the accommodating cavity 210, the external airflow can enter the bottom of the aerosol generating product 200 along the air inlet channel 2420. The medium of the aerosol generating product 200 is heated to generate aerosol. Under the load of negative pressure when the user inhales, the smoke is inhaled by the user.

[0046] Preferably, multiple air inlet holes 122 are provided through the side wall 12. These multiple air inlet holes 122 can be evenly distributed in an array, facilitating uniform air intake. By providing multiple air inlet holes 122, even if one or more of the air inlet holes 122 are blocked, air can still enter through the remaining air inlet holes 122. Furthermore, compared to a single air inlet hole, the diameter of each of the multiple air inlet holes 122 is smaller, preventing the ingress of debris and the outflow of condensate.

[0047] The array distribution shape of the plurality of air inlet holes 122 is not limited, and may be, for example, a circular array, an elliptical array, or a square array. The cross-sectional shape of each air inlet hole 122 is not limited, and may be, for example, a regular shape such as a circle, an ellipse, or a polygon, or an irregular shape.

[0048] Multiple air inlet grooves 121 are evenly distributed around the circumference of the multiple air inlet holes 122, facilitating uniform air intake. One end of each air inlet groove 121 is connected to the air inlet hole 122, and the other end extends in a straight line away from the air inlet hole 122. The linear shape of the air inlet grooves 121 helps reduce air intake resistance. Furthermore, the air inlet grooves 121 can extend radially outward from the circumference of the air inlet hole 122, leaving more space for the air inlet grooves 121 to radiate outward, thereby improving the effectiveness of preventing air flow obstruction.

[0049] Of course, in other embodiments, the shape of the air inlet groove 121 can be arbitrarily set as needed. For example, the air inlet groove 121 can also be in an arc shape, an S shape, a broken line shape, or other non-linear shapes, or the air inlet groove 121 can extend along a straight line at a certain angle to the radial direction.

[0050] The plurality of air inlet grooves 121 may be evenly distributed around the plurality of air inlet holes 122. Specifically, protrusions (e.g., ribs) evenly distributed around the air inlet holes 122 may be provided on the outer surface of the side wall 12, with an air inlet groove 121 formed between each two adjacent protrusions. Alternatively, the outer surface of the side wall 12 may be evenly distributed around the air inlet holes 122, with the pits forming the air inlet grooves 121.

[0051] like Figures 1 to 3 As shown, in the first embodiment, a plurality of air inlet holes 122 are distributed in a circular array on the side wall 12, and a plurality of protrusions 123 are protruding from a portion of the outer surface 120 of the side wall 12. The plurality of protrusions 123 are evenly distributed along the circumference of the air inlet holes 122, and an air inlet groove 121 is formed between every two adjacent protrusions 123.

[0052] In some embodiments, the protrusion 123 may be formed by integrally protruding outward from a portion of the outer surface 120 of the side wall 12. Of course, in other embodiments, the protrusion 123 may also be a separately formed component that is then assembled to the outer surface 120 of the side wall 12 by bonding, welding, snap-fitting, magnetic connection, or the like.

[0053] Each protrusion 123 (or each air inlet groove 121) can extend radially outward from the circumference of the air inlet hole 122, so that the multiple protrusions 123 and the multiple air inlet grooves 121 are radial. Each air inlet groove 121 is linear, which is beneficial to reducing the air intake resistance. Furthermore, the cross-sectional area of ​​each air inlet groove 121 can gradually decrease from the air inlet end to the air outlet end. On the one hand, it can accelerate the airflow into the air inlet hole 122. On the other hand, the cross-sectional area of ​​the air inlet end of the air inlet groove 121 is larger, which is beneficial to increase the air intake space of the airflow. Among them, the "air inlet end" and "air outlet end" are defined by the flow direction of the airflow. The end where the airflow flows in is the air inlet end, and the end where the airflow flows out is the air outlet end. Here, the air outlet end of the air inlet groove 121 is the end where the air inlet groove 121 is connected to the air inlet hole 122, and the air outlet end of the air inlet groove 121 is the end away from the air inlet hole 122.

[0054] Of course, in other embodiments, the shape and cross-sectional area of ​​the air inlet groove 121 can be set arbitrarily as needed. For example, the cross-sectional area of ​​the air inlet groove 121 from the air inlet end to the air outlet end is equal; for another example, the air inlet groove 121 can also be set in a non-linear shape, for example, it can also be in other shapes such as arc, S-shape or broken line.

[0055] The bottom surface 1211 of the air inlet groove 121 can be flush with the air inlet end surface 1221 of the air inlet hole 122, which facilitates the airflow in the air inlet groove 121 to enter the air inlet hole 122 more smoothly. Of course, in other embodiments, the bottom surface 1211 of the air inlet groove 121 and the air inlet end surface 1221 of the air inlet hole 122 can also be arranged non-flush. Here, the air inlet end surface 1221 of the air inlet hole 122 refers to the end surface of the air inlet hole 122 that connects to the air inlet groove 121, and the bottom surface 1211 of the air inlet groove 121 refers to the surface of the air inlet groove 121 on the side close to the central axis of the housing 10. In this embodiment, the air inlet groove 121 is formed by a protrusion 123 protruding from the outer surface 120 of the side wall 12, and the bottom surface 1211 of the air inlet groove 121 is flush with the outer surface 120 of the side wall 12.

[0056] In the anti-hand-blocking air intake structure of this embodiment, even when a user holds the air intake structure, air can still enter through the air intake groove 121 between the two protrusions 123 and enter the air intake channel 2420 through the air intake hole 122. In addition, because the protrusion 123 protrudes from the outer surface 120 of the side wall 12, the anti-blocking effect of the air intake is further enhanced.

[0057] like Figures 7 to 9 As shown, in the second embodiment, a plurality of air inlet holes 122 are distributed in a circular array on the side wall 12, and a portion of the outer surface 120 of the side wall 12 is recessed to form a plurality of air inlet grooves 121. That is, the top surface of the air inlet groove 121 (i.e., the surface on the side away from the central axis of the housing 10) is flush with the outer surface 120 of the side wall 12. A protrusion 123 is formed in the portion of the side wall 12 between each two adjacent air inlet grooves 121. The bottom surface 1211 of the air inlet groove 121 can be flush with the air inlet end surface 1221 of the air inlet hole 122, which is conducive to smoother air flow entering the air inlet hole 122. Of course, in other embodiments, the bottom surface 1211 of the air inlet groove 121 can also be non-flush with the air inlet end surface 1221 of the air inlet hole 122.

[0058] The plurality of air inlet grooves 121 are evenly distributed around the circumference of the air inlet hole 122. Furthermore, in this embodiment, each air inlet groove 121 extends linearly, specifically extending radially outward from the circumference of the air inlet hole 122. The cross-sectional area of ​​each air inlet groove 121 from the air inlet end to the air outlet end is uniform.

[0059] Of course, in other embodiments, the shape and cross-sectional area of ​​the air inlet groove 121 can be set arbitrarily as needed. For example, the cross-sectional area of ​​the air inlet groove 121 gradually decreases from the air inlet end to the air outlet end. For another example, the air inlet groove 121 can also be set in a non-linear shape. For example, it can also be in other shapes such as arc, S-shape or broken line.

[0060] In the anti-hand-blocking air intake structure of this embodiment, when the user holds the air intake structure, air flow can still enter from the air intake groove 121 between the two protrusions 123 and enter the air intake channel 2420 through the air intake hole 122.

[0061] For example Figure 5 As shown, the heating assembly 20 includes a heating tube 21. The inner wall of the heating tube 21 defines a receiving cavity 210 for receiving at least a portion of the aerosol-generating article 200. The heating method used by the heating assembly 20 is not limited. For example, it can use one or more of resistance heating, electromagnetic heating, infrared heating, etc.

[0062] like Figure 10 As shown, in some embodiments, the heat pipe 21 may include a base tube 221 and a heat-generating layer 222 disposed on the base tube 221. The base tube 221 may be in the shape of a circular tube with both ends extending through it, and its inner wall defines a receiving cavity 210. The heat-generating layer 222 may be disposed on the outer surface and / or inner surface of the base tube 221. It is connected to the control circuit and is configured to generate heat when energized to heat the aerosol-generating article 200 inserted into the base tube 221. Preferably, the heat-generating layer 222 is disposed on the outer surface of the base tube 221 to facilitate processing and manufacturing.

[0063] In some embodiments, the heating layer 222 may be a membrane structure, which may include an infrared film 2221 and a resistive heating circuit 2222 disposed on the outer surface of the base tube 221. When connected to a power source, the resistive heating circuit 2222 generates heat, which is then transferred to the base tube 221. The base tube 221 then transfers the heat to the infrared film 2221. Alternatively, the resistive heating circuit 2222 directly transfers the heat to the infrared film 2221. When heated, the infrared film 2221 generates infrared light waves, which are transmitted through the base tube 221 and absorbed by the aerosol-generating article 200 inserted therein, thereby heating the aerosol-generating article 200. Furthermore, the base tube 221 can also heat the aerosol-generating article 200 in contact therewith through heat conduction. Accordingly, the base tube 221 may be made of a material that is transparent to infrared light waves, such as transparent ceramic or quartz. In addition, the base tube 221 also has a relatively high thermal conductivity (eg, thermal conductivity greater than or equal to 10 W / mK, preferably greater than or equal to 30 W / mK) so as to better transfer heat.

[0064] In some embodiments, the base tube 221 may be a ceramic tube made of a ceramic material with a high thermal conductivity. The ceramic materials that may be used for the base tube 221 include one or more of aluminum oxide, spinel, yttrium oxide, zirconium oxide, magnesium oxide, beryllium oxide, gallium arsenide, zinc sulfide, zinc selenide, magnesium fluoride, and calcium fluoride. For example, the base tube 221 may be made of aluminum oxide, wherein the aluminum oxide has a purity greater than or equal to 99% and a density greater than or equal to 99% (density = measured density / true density*100%).

[0065] In some embodiments, the transmittance of the base tube 221 to infrared light with a wavelength of 0 to 6.5 μm is greater than or equal to 50%. After heating, the base tube 221 can radiate infrared light waves with a wavelength of 8 to 11 μm.

[0066] The infrared film 2221 can be coated, covered, or printed on the outer side of the base tube 221. The infrared film 2221 evenly covers the entire outer side of the base tube 221. The resistive heating circuit 2222 can be provided on the infrared film 2221 and can be formed on the infrared film 2221 by coating or printing.

[0067] In some embodiments, the heating layer 222 further includes a conductive film 2223 connected to the resistive heating circuit 2222. The conductive film 2223 is disposed on the outer side of the base tube 221 and is used to connect the resistive heating circuit 2222 to an external power source. Typically, there are two conductive films 2223, one connected to each end of the resistive heating circuit 2222. In some embodiments, the conductive film 2223 can be printed and laminated onto the resistive heating circuit 2222. The conductive film 2223 at least partially overlaps the resistive heating circuit 2222, thereby ensuring reliable electrical contact.

[0068] Furthermore, the heating component 20 also includes an electrode 224 connected to the conductive film 2223. There are typically two electrodes 224, one end of each of which is connected to the two conductive films 2223, and the other end is connected to an external power source. The electrode 224 can be an electrode lead, one end of which can be welded to the conductive film 2223. In other embodiments, the electrode 224 can also be an electrode sheet or an electrode column, which can be electrically connected to the conductive film 2223 by contact.

[0069] It is understood that in other embodiments, the infrared film 2221 and / or the resistive heating circuit 2222 may also be disposed on the inner surface of the base tube 221. For example, the resistive heating circuit 2222 is disposed on the outer surface of the base tube 221, while the infrared film 2221 is disposed on the inner surface of the base tube 221. In this case, the base tube 221 only needs to have a high thermal conductivity and does not need to be light-transmissive. In another example, the resistive heating circuit 2222 is disposed on the inner surface of the base tube 221, while the infrared film 2221 is disposed on the outer surface of the base tube 221. In another example, both the infrared film 2221 and the resistive heating circuit 2222 are disposed on the inner surface of the base tube 221.

[0070] In other embodiments, the heating layer 222 may also be a conventional infrared heating film that actively generates heat and radiates infrared light when powered on. The infrared heating film may be provided on the outer surface and / or inner surface of the base tube 221 .

[0071] Figures 11 to 13 Shows the heating tube 21 in other embodiments of the present invention, which is different from the above Figure 10 The main difference from the illustrated embodiment is that the heat pipe 21 in this embodiment further includes a protective layer 223 disposed on the base tube 221. The heat-generating layer 222 is at least partially located between the protective layer 223 and the base tube 221. The thickness of the protective layer 223 is smaller than that of the base tube 221, and the thermal conductivity of the protective layer 223 is lower than that of the base tube 221.

[0072] The protective layer 223 enhances the mechanical strength of the base tube 221 (especially the mechanical strength of a base tube 221 with a smaller thickness), thermal stability, and dielectric strength. It also enhances the aesthetics of the heat pipe 21, facilitates cleaning, and resists corrosion. In some embodiments, the ratio of the thermal conductivity of the base tube 221 to the thermal conductivity of the protective layer 223 is greater than or equal to 6. The thermal conductivity of the protective layer 223 is less than or equal to 1.5 W / mK.

[0073] Furthermore, the provision of the protective layer 223 facilitates the thinning of the base tube 221, thereby reducing the heat capacity of the base tube 221, increasing the heating rate, and thus reducing energy consumption. Furthermore, the thinning of the base tube 221 increases the transmittance of infrared light, further improving energy efficiency. This also facilitates the miniaturization of the heating component 20, and consequently, the entire aerosol generating device 100. In some embodiments, the thickness of the base tube 221 is less than or equal to 0.8 mm.

[0074] In addition, the infrared transmittance of the protective layer 223 is low, thereby reducing the outward transmission of infrared light waves. In some embodiments, the infrared light emissivity of the protective layer 223 with a wavelength of 1 to 10 μm is less than or equal to 0.5, thereby reducing energy consumption.

[0075] In some embodiments, the protective layer 223 may cover the entire outer surface of the base tube 221 and may cover the upper and lower end surfaces of the base tube 221. By covering the entire outer surface of the base tube 221 with the protective layer 223, the entire heating layer 222 is covered within the protective layer 223, thereby preventing the heating layer 222 from being corroded by the outside world, enhancing the corrosion resistance of the heating component 20, and preventing fouling, which is beneficial for cleaning the heating component 20. In addition, it can also block or slow down the heat transferred outward from the outer surface of the base tube 221. By covering the upper and lower end surfaces of the base tube 221 with the protective layer 223, it can block or slow down the heat transferred outward from the upper and lower end surfaces of the base tube 221, thereby reducing heat loss and improving energy efficiency. In addition, it can also simplify the process, and the end surface of the base tube 221 does not need to be deliberately protected.

[0076] Of course, in other embodiments, the protective layer 223 may only cover the outer surface of the base tube 221 and one end surface of the base tube 221 , or the protective layer 223 may only cover the outer surface of the base tube 221 .

[0077] The protective layer 223 and the base tube 221 can form an integral structure to improve the structural stability of the heating tube 21. Specifically, the protective layer 223 can be a glass glaze, which can be formed into an integral structure with the base tube 221 through calcination. It should be noted that glaze is a continuous glassy layer attached to the surface of the ceramic body, or a mixed layer of glass and crystals. It is made by grinding mineral raw materials (quartz) and raw materials in a certain proportion to make a glaze slurry, applying it to the surface of the body, and calcining it at a certain temperature. Of course, in some other embodiments, the protective layer 223 is not limited to glass glaze.

[0078] Figure 14 The heating tubes 21 in some other embodiments of the present invention are shown. The main difference between them and the above embodiments is that, in this embodiment, the infrared film 2221 is arranged on the inner surface of the base tube 221, the resistance heating circuit 2222 is arranged on the outer surface of the base tube 221, and the protective layer 223 covers the resistance heating circuit 2222 and the outer surface of the base tube 221.

[0079] The working principle of the heating tube 21 is as follows: the resistance heating circuit 2222 is connected to the power supply through the electrode 224. The resistance heating circuit 2222 generates heat under the action of the current. The heat is transferred to the base tube 221 and then to the infrared film 2221. The infrared film 2221 is heated to generate infrared light waves. The infrared light waves are absorbed by the aerosol generating article 200 inserted into the base tube 221, thereby heating the aerosol generating article 200.

[0080] In this embodiment, since the infrared film 2221 is disposed on the inner surface of the base tube 221, the base tube 221 only needs to have a high thermal conductivity and does not need to be transparent to infrared light waves. Furthermore, the base tube 221 can have a low infrared transmittance, thereby reducing the outward transmission of infrared light waves.

[0081] For example Figure 2 、 Figures 4 to 6 As shown, in some embodiments, the heating component 20 further includes a fixing component 29 , and a cavity 2310 is formed in the fixing component 29 . The heating pipe 21 is disposed in the cavity 2310 and further fixed to the housing 10 by the fixing component 29 .

[0082] In some embodiments, the fixing assembly 29 may include a sleeve 23 and a fixing seat 24. The sleeve 23 is a through-type structure with two ends and a cavity 2310 formed inside. The fixing seat 24 is disposed at the lower end of the sleeve 23 and covers the lower end opening of the sleeve 23.

[0083] The sleeve 23 may include a cylindrical body 231 and an extension portion 232 disposed at the upper end of the cylindrical body 231. The cylindrical body 231 and the extension portion 232 may be coaxially arranged, but are not limited to a coaxial arrangement. The inner wall surface of the cylindrical body 231 defines a cavity 2310, and the inner wall surface of the extension portion 232 defines an insertion hole 2320. The aerosol-generating article 200 can be inserted into the heating tube 21 through the insertion hole 2320.

[0084] In some embodiments, both the barrel 231 and the extension 232 may be tubular, with the inner and outer diameters of the barrel 231 being larger than those of the extension 232. The larger inner diameter of the barrel 231 allows for a larger receiving space in the cavity 2310 formed therein. The upper end of the extension 232 may be embedded in the top wall 11 of the housing 10, thereby securing the sleeve 23 within the housing 10.

[0085] The fixing seat 24 may include a seat body 241, an air passage portion 242 extending from the lower end surface of the seat body 241, and a first annular portion 243 and a second annular portion 244 extending upward from the upper end surface of the seat body 241. The outer diameter of the seat body 241 is consistent with the outer diameter of the cylinder body 231. The first annular portion 243 is embedded in the lower end opening of the cylinder body 231 and can be fixed to the cylinder body 231 by means of an interference fit, a snap fit, a threaded fit, or the like.

[0086] The second annular portion 244 is located inside the first annular portion 243. The outer wall of the second annular portion 244 is spaced from the inner wall of the first annular portion 243, and the annular space 2430 formed therebetween can provide thermal insulation.

[0087] The upper end surface of the second annular portion 244 also extends upward to form at least two clamping arms 245. These at least two clamping arms 245 are spaced apart circumferentially around the second annular portion 244 and are used to clamp and secure the lower end of the heating tube 21. Securing the heating tube 21 with the clamping arms 245 can reduce the contact area between the heating tube 21 and the fixing base 24, facilitating thermal insulation. Of course, in other embodiments, the fixing base 24 may not be provided with the clamping arms 245, and the heating tube 21 may be directly embedded in the second annular portion 244 for securement.

[0088] An air inlet passage 2420 is formed within the air channel portion 242, connecting the air inlet hole 122 and the accommodating chamber 210. In some embodiments, the air inlet passage 2420 may include a first air inlet passage 2421 communicating with the air inlet hole 122 and a second air inlet passage 2422 communicating with the first air inlet passage 2421 and the accommodating chamber 210. The second air inlet passage 2422 communicates with the bottom of the accommodating chamber 210 and may be coaxial with the accommodating chamber 210. Of course, in other embodiments, the second air inlet passage 2422 and the accommodating chamber 210 are not limited to being coaxial. For example, the central axis of the second air inlet passage 2422 may be parallel to, but not coincident with, the central axis of the accommodating chamber 210.

[0089] The first air inlet 2421 and the second air inlet 2422 are arranged at an angle. In this embodiment, the first air inlet 2421 and the second air inlet 2422 are arranged at an angle of approximately 90 degrees, so that the airway portion 242 is approximately L-shaped.

[0090] In some embodiments, the heating assembly 20 may further include a reflective cover 22, which may be disposed in the cavity 2310 and sleeved around the outer periphery of the heating tube 21 to reflect the thermal radiation emitted by the heating tube 21. This, on the one hand, reduces the amount of heat transferred to the sleeve 23, thereby improving the thermal insulation effect of the aerosol generating device 100, and on the other hand, reduces thermal radiation loss, thereby improving the energy efficiency of the heating tube 21. The lower end of the reflective cover 22 may be sleeved outside the second annular portion 244 to facilitate installation and fixation of the reflective cover 22.

[0091] The shape of the reflector 22 is not limited; for example, it can be a polygonal tube or a circular tube, among other shapes. The reflector 22 can be spaced apart from the heating tube 21 to reduce heat transfer from the heating tube 21 to the reflector 22. The reflector 22 can also be spaced apart from the sleeve 23 to facilitate thermal insulation. Of course, in other embodiments, insulation material can be placed between the reflector 22 and the heating tube 21 and / or between the reflector 22 and the sleeve 23 to provide thermal insulation.

[0092] Furthermore, at least one end of the heating pipe 21 may be provided with a heat insulation structure to reduce the amount of heat transferred from the heating pipe 21 to the fixing assembly 29, thereby reducing heat loss and improving energy efficiency.

[0093] Specifically, a first thermal insulation structure is provided at the upper end of the heating tube 21. This first thermal insulation structure includes a first thermal insulation member 25. The first thermal insulation member 25 can be annular and can be coaxially arranged with the heating tube 21. The upper end surface of the heating tube 21 abuts against the top wall of the cylinder 231 via the first thermal insulation member 25, thereby achieving thermal insulation between the heating tube 21 and the sleeve 23.

[0094] The first thermal insulator 25 can be made of a thermally insulating material with low thermal conductivity (e.g., thermal conductivity less than or equal to 2.07 W / mK) and high temperature resistance. In some embodiments, the first thermal insulator 25 can be made of insulating ceramic, such as zirconia ceramic. Of course, in other embodiments, the first thermal insulator 25 can also be made of other insulating materials such as aerogel and aerosol glue.

[0095] In some embodiments, an annular inner flange 2311 is formed on the inner side of the top wall of the barrel 231, and the first thermal insulation member 25 is at least partially disposed within the inner flange 2311. The outer diameter of the inner flange 2311 is smaller than the inner diameter of the barrel 231, so that the inner flange 2311 is spaced apart from the side wall of the barrel 231, which facilitates thermal insulation.

[0096] The first thermal insulation member 25 may include a main body 251 and a sleeve portion 252 extending downward from an end surface of the main body 251. The main body 251 is disposed within the inner flange 2311, and the main body 251 and the inner flange 2311 are sealed together to reduce or prevent aerosol generated by the aerosol-generating article 200 inserted into the accommodating cavity 210 from leaking through the gap between the main body 251 and the inner flange 2311.

[0097] In some embodiments, the first thermal insulation structure further includes a first sealing member 26 disposed between the main body 251 and the inner flange 2311 to improve the sealing effect. The material of the first sealing member 26 preferably has high temperature resistance, thermal insulation, and sealing properties. In some embodiments, the first sealing member 26 can be made of thermal insulation silicone.

[0098] The sleeve portion 252 is annular and sleeved on the upper end of the heating tube 21. The inner diameter of the sleeve portion 252 is larger than the inner diameter of the main body 251, so that the upper end surface of the heating tube 21 can abut against the lower end surface of the main body 251.

[0099] The upper end of the reflector 22 is sleeved onto the outer surface of the sleeve portion 252. The inner wall surface of the upper end of the reflector 22 and the outer wall surface of the sleeve portion 252 may be at least partially in contact or may not be in contact at all. In this embodiment, the sleeve portion 252 is annular, and the reflector 22 is a regular polygonal cylindrical shape. The outer diameter of the sleeve portion 252 may be approximately equal to the diameter of the inscribed circle of the reflector 22, so that the sleeve portion 252 and the reflector 22 are partially in contact and partially spaced apart. This not only ensures the installation and fixation of the reflector 22, but also facilitates thermal insulation between the sleeve portion 252 and the reflector 22. Of course, in other embodiments, the outer diameter of the sleeve portion 252 may also be smaller than the diameter of the inscribed circle of the reflector 22.

[0100] The lower end of the heating tube 21 is provided with a second thermal insulation structure, which includes a second thermal insulation member 28. The lower end surface of the heating tube 21 abuts against the fixing base 24 via the second thermal insulation member 28, thereby achieving thermal insulation between the heating tube 21 and the fixing base 24. The second thermal insulation member 28 can be made of a high-temperature resistant material with low thermal conductivity. In some embodiments, the second thermal insulation member 28 can be made of thermally insulating silicone (preferably a vapor-phase silicone with a temperature resistance greater than 320°C).

[0101] In some embodiments, the second thermal insulation structure further includes a support member 27. The lower end surface of the heating tube 21 abuts against the support member 27 via a second thermal insulation member 28, and further abuts against the fixing seat 24 via the support member 27. The second thermal insulation member 28 can be annular and sealingly sleeved between the outer wall of the support member 27 and the inner wall of the second annular portion 244.

[0102] The support member 27 may be annular and have a vent hole 270 extending therethrough. Airflow entering through the second air inlet duct 2422 can enter the accommodating chamber 210 through the vent hole 270. The second air inlet duct 2422, the vent hole 270, and the accommodating chamber 210 may be coaxially arranged from bottom to top. The support member 27 has an end wall 271, which is formed annularly by the vent hole 270. The lower end of the aerosol-generating article 200 may rest against the end wall 271. It is understood that in other embodiments, the end wall 271 may be provided with multiple vent holes 270.

[0103] The support member 27 can be made of a heat-insulating material with low thermal conductivity and high temperature resistance, such as heat-insulating ceramics. Of course, in other embodiments, the support member 27 can also be made of other heat-insulating materials such as aerogels and vapor phase glues. In other embodiments, the support member 27 may not be provided, and the lower end of the aerosol generating article 200 may directly rest on the fixing seat 24 (such as Figure 8 shown).

[0104] Figure 15 The heat generating assembly 20 in some embodiments of the present invention is shown. Figure 5 The main difference between the illustrated embodiment is that, in this embodiment, a buffer chamber 2423 is provided at the intersection of the first air inlet duct 2421 and the second air inlet duct 2422, and the buffer chamber 2423 can buffer the condensate formed after suction.

[0105] Specifically, the first air inlet duct 2421 is arranged horizontally, with one end of the first air inlet duct 2421 connected to the outside atmosphere and the other end connected to the lower end of the second air inlet duct 2422. The second air inlet duct 2422 is arranged longitudinally and connected to the bottom of the accommodating chamber 210. The central axis of the second air inlet duct 2422 coincides with the central axis of the accommodating chamber 210 and is perpendicular to the central axis of the first air inlet duct 2421.

[0106] The buffer chamber 2423 may extend downward from the intersection of the first air inlet duct 2421 and the second air inlet duct 2422 and communicate with the first air inlet duct 2421 and the second air inlet duct 2422. The bottom wall 2426 of the buffer chamber 2423 is lower than the bottom wall 2424 of the first air inlet duct 2421.

[0107] It should be noted that the bottom wall surfaces 2426 and 2424 are defined when the device is in normal use or placement. Alternatively, the bottom wall surfaces 2426 and 2424 can also be understood as the walls of the buffer chamber 2423 and the first air inlet duct 2421 that are away from the accommodating chamber 210 in the axial direction of the accommodating chamber 210.

[0108] The buffer chamber 2423 is located below the accommodating chamber 210, the second air inlet duct 2422, and the first air inlet duct 2421. This allows condensate in the accommodating chamber 210, the second air inlet duct 2422, and the first air inlet duct 2421 to flow into the buffer chamber 2423 for buffering. Furthermore, the buffer chamber 2423 is offset from the flow path of the intake air in the first and second air inlet ducts 2421, 2422, to prevent the airflow from directly carrying away condensate in the buffer chamber 2423 during inhalation, thereby affecting the inhalation experience.

[0109] A guide slope 2425 is provided at the intersection of the buffer chamber 2423 and the first air inlet duct 2421 to guide backflowing smoke. After inhalation, the smoke backflows downward through the second air inlet duct 2422, turns after encountering the bottom wall 2426 of the buffer chamber 2423, and climbs upward along the guide slope 2425. There, it is blocked by the upper sidewall of the first air inlet duct 2421, forming a vortex, thereby preventing the smoke from flowing out of the entrance of the first air inlet duct 2421, slowing the backflow of smoke and improving the user experience.

[0110] The guide slope 2425 is set at an angle to the bottom wall 2426 of the cache cavity 2423, and the upper end of the guide slope 2425 is inclined toward the inlet end of the first air inlet duct 2421, so that the cross-sectional area of ​​the cache cavity 2423 gradually increases from bottom to top.

[0111] In some embodiments, the angle between the guide slope 2425 and the bottom wall 2426 can be 30° to 60°, preferably about 45°. On the one hand, the return airflow has a smaller deflection angle when flowing along the bottom wall 2426 toward the guide slope 2425, allowing the return airflow to more smoothly turn toward the guide slope 2425. On the other hand, the return airflow flowing upward along the guide slope 2425 can better form a vortex under the obstruction of the upper sidewall of the first air inlet duct 2421, thereby preventing smoke from flowing out of the entrance of the first air inlet duct 2421.

[0112] In some embodiments, a liquid absorbent member 246 may be further provided in the buffer chamber 2423 for absorbing condensation collected in the buffer chamber 2423. The liquid absorbent member 246 may also be replaced regularly, and a new liquid absorbent member 246 may be replaced to continue absorbing condensation.

[0113] The absorbent member 246 is a porous structure, the porous structure within it capable of absorbing and storing a certain amount of condensed liquid. Preferably, the absorbent member 246 is a liquid absorbent cotton. The absorbent member 246 is placed at the bottom of the buffer chamber 2423. A certain distance exists between the edge of the absorbent member 246 and the edge of the bottom wall 2426 of the buffer chamber 2423. This not only facilitates the assembly of the absorbent member 246 into the buffer chamber 2423 but also provides space for the liquid absorbent cotton to expand after absorbing liquid. In some embodiments, the distance between the edge of the absorbent member 246 and the edge of the bottom wall 2426 can be greater than 0 and less than or equal to 1.5 mm.

[0114] It can be understood that the above technical features can be used in any combination without limitation.

[0115] The above embodiments only express the specific implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. An aerosol generating device, characterized in that include: A housing (10) is formed therein with a receiving cavity (210) for receiving at least a portion of the aerosol generating article (200), The housing (10) includes a side wall (12), and the side wall (12) is provided with at least one air inlet (122) for allowing external airflow to enter the accommodating cavity (210). The outer surface of the side wall (12) is provided with a plurality of air inlet grooves (121) surrounding the at least one air inlet hole (122) and communicating with the at least one air inlet hole (122).

2. The aerosol generating device according to claim 1, wherein A plurality of air inlet holes (122) are provided on the side wall of the housing (10), and the plurality of air inlet holes (122) are distributed in a uniform array.

3. The aerosol generating device according to claim 1, wherein A plurality of protrusions (123) protrude from a portion of the outer surface of the side wall (12), and an air inlet groove (121) is formed between every two adjacent protrusions (123).

4. The aerosol generating device according to claim 1, wherein The plurality of air inlet grooves (121) are formed by partially recessing the outer surface of the side wall (12).

5. The aerosol generating device according to claim 1, wherein: The bottom surface (1211) of each air inlet groove (121) is flush with the air inlet end surface (1221) of the air inlet hole (122).

6. The aerosol generating device according to claim 1, wherein: The plurality of air inlet grooves (121) are radially shaped.

7. The aerosol generating device according to claim 1, wherein One end of each of the air inlet grooves (121) is connected to the at least one air inlet hole (122), and the other end extends in a straight line in a direction away from the at least one air inlet hole (122).

8. The aerosol generating device according to claim 1, wherein The cross-sectional area of ​​each of the air inlet grooves (121) gradually decreases or remains unchanged in a direction approaching the at least one air inlet hole (122).

9. The aerosol generating device according to any one of claims 1 to 8, characterized in that: The housing (10) has an air inlet channel (2420) therein, the air inlet channel (2420) comprising a first air inlet channel (2421) communicating with the at least one air inlet hole (122) and a second air inlet channel (2422) communicating the first air inlet channel (2421) with the bottom of the accommodating chamber (210). A buffer cavity (2423) is provided at the intersection of the first air inlet duct (2421) and the second air inlet duct (2422), and the bottom wall surface of the buffer cavity (2423) is lower than the bottom wall surface of the first air inlet duct (2421).

10. The aerosol generating device according to any one of claims 1 to 8, characterized in that: The aerosol generating device further comprises a heating tube (21) disposed in the housing (10), wherein the inner wall surface of the heating tube (21) defines the accommodating cavity (210). The heating pipe (21) comprises: an infrared-transparent substrate tube (221); A heating layer (222) is provided on the outer wall surface of the base tube (221) and is used to generate infrared light waves after being energized; and A protective layer (223) is coated on the outside of the heating layer (222) and the base tube (221); the thermal conductivity of the protective layer (223) is lower than the thermal conductivity of the base tube (221).

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