Heating assembly and aerosol generating device

Abstract

The embodiment of the invention provides a heating assembly and an aerosol generating device, and the heating assembly comprises a first tubular body which is internally provided with a first accommodation cavity; the airflow heater is used for heating airflow flowing from the upstream end of the airflow heater to the downstream end of the airflow heater so as to form hot airflow for heating the aerosol generating product, and at least part of the airflow heater is kept in the first containing cavity; the lower bracket is arranged adjacent to the upstream end of the airflow heater and is connected with the first tubular body and the airflow heater; the heat conductivity of the lower support is larger than 10 W / (m.K).

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of heat-without-combustion aerosol generation, and in particular to a heating component and an aerosol generating device. Background Art

[0002] Smoking articles (eg, cigarettes, cigars, etc.) burn tobacco during use to produce tobacco smoke. People have attempted to replace these tobacco-burning articles by creating products that release compounds without combustion.

[0003] An example of such a product is a heating device that heats air to form hot air, which then releases the compound by heating the material rather than burning it. For example, the material may be an aerosol-generating article containing tobacco or other non-tobacco products that may or may not contain nicotine.

[0004] The known heating device comprises a sleeve and a connecting piece connecting the air heater and the sleeve, wherein the air heater is held in the sleeve, and the connecting piece is usually made of zirconia ceramics.

[0005] However, the condensate formed by smoke reflux is easily adsorbed on the zirconia ceramic, and the zirconia ceramic will continue to bake the condensate on its surface with the residual heat after the air heater stops heating, thereby drying the condensate on its surface to form carbon deposits adhering to the zirconia ceramic. In current heating devices, a large amount of carbon deposits will usually accumulate on the zirconia ceramic before 300 cigarettes are smoked, which will affect the air entering the air heater, increase the suction resistance, seriously affect the smoking experience and limit the service life of the heating device. Summary of the invention

[0006] The present application provides a heating component and an aerosol generating device, which can ensure a long-term good smoking experience and a long service life.

[0007] An embodiment of the present application provides a heating component, comprising:

[0008] A first tubular body having a first accommodating cavity disposed therein;

[0009] an airflow heater for heating an airflow flowing from an upstream end thereof to a downstream end thereof to form a hot airflow for heating the aerosol generating product, wherein at least a portion of the airflow heater is retained in the first accommodating chamber; and

[0010] a lower bracket, disposed adjacent to the upstream end of the airflow heater and connecting the first tubular body and the airflow heater;

[0011] Wherein, the thermal conductivity of the lower bracket is greater than 10 W / (m·K).

[0012] An embodiment of the present application provides a heating component, comprising:

[0013] an insulating tube, wherein a first accommodating cavity and a second accommodating cavity are arranged in communication with each other, wherein the second accommodating cavity is used to accommodate at least a portion of the aerosol generating product;

[0014] an airflow heater, comprising an air guide element and a heating element, wherein the heating element is combined with the air guide element to heat the air guide element, the air guide element has one or more air holes in fluid communication with the second accommodating chamber, and the air guide element is configured to release heat to heat air flowing through the air holes, so that the air forms a hot airflow for heating the aerosol generating article;

[0015] a lower bracket connecting the heat-insulating tube and the airflow heater; and

[0016] A support, supporting the lower bracket to hold at least a portion of the airflow heater in the first accommodating cavity;

[0017] The lower bracket comprises stainless steel.

[0018] One embodiment of the present application provides an aerosol generating device, comprising the heating component as described above, and also comprising a power supply component, wherein the power supply component is configured to provide power to the airflow heater for heating the airflow.

[0019] The above-mentioned heating component and aerosol generating device connect the airflow heater and the lower bracket of the first tubular body, and its thermal conductivity is greater than 10W / (m·K), so that the lower bracket can be quickly cooled down after the airflow heater stops heating the airflow, thereby reducing the baking of condensate and oil adhering to its surface; therefore, it can effectively prevent the formation of carbon deposits on the lower bracket, which helps to keep the airflow heater unobstructed, and is beneficial for preventing the increase of the suction resistance of the heating component and the aerosol generating device, so that the user can have a long-term good smoking experience and can extend the service life of the heating component and the aerosol generating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0021] Figure 1 is a schematic diagram of an aerosol generating device provided by an embodiment;

[0022] Figure 2 is a schematic diagram of a heating assembly provided by an embodiment;

[0023] Figure 3 is an exploded schematic diagram of a heating assembly provided by an embodiment;

[0024] Figure 4 is a schematic diagram of a combination of a heating assembly provided by an embodiment;

[0025] Figure 5 is a schematic diagram of an aerosol generating device provided in another embodiment;

[0026] Figure 6 is a schematic diagram of a heating assembly provided in another embodiment;

[0027] Figure 7 is an exploded schematic diagram of a heating assembly provided by an embodiment;

[0028] Figure 8 is a schematic diagram of a combination of a heating assembly provided by an embodiment;

[0029] In the figure:

[0030] 1. Heating assembly; 11. First tubular body; 111. Second accommodating chamber; 112. Air interlayer; 113. Protrusion; 12. Airflow heater; 121. Air hole;

[0031] 131, lower bracket; 1311, supporting portion; 1312, lower stopper; 1313, connecting portion;

[0032] 132, support; 1321, first channel; 1322, annular side wall; 1323, first air inlet; 1324, air outlet; 1325, second air inlet; 1326, support edge; 1327, claw;

[0033] 14. Interval cavity;

[0034] 15. upper bracket; 151. third channel; 152. shielding portion; 153. upper stopper portion; 154. embedding portion;

[0035] 17, support plate; 171, first through hole; 172, second through hole; 173, convex rib; 174, second channel;

[0036] 18. Bottom cover;

[0037] 19. Collection chamber;

[0038] 20. second tubular body; 201. air intake passage;

[0039] 2. Aerosol generating products;

[0040] 3. Power supply;

[0041] 4. Circuit board. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] The terms "first", "second", "third" in the present application are only used for descriptive purposes, and cannot be interpreted as indicating or suggesting relative importance or implicitly indicating the quantity or order of the indicated technical features. In the present application embodiment, all directional indications (such as up, down, left, right, front, back ...) are only used to explain the relative position relationship or movement conditions between the components under a certain posture (as shown in the accompanying drawings), and if the posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, the process, method, system, product or equipment comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or equipment.

[0044] Reference to "embodiments" herein means that the features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0045] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be one or more central elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0046] You can refer to Figure 1 and Figure 5 One embodiment of the present application provides an aerosol generating device, which is a device that is coupled or interacts with an aerosol generating article 2 to form an inhalable aerosol.

[0047] As used herein, the term "aerosol-generating article" refers to an article comprising an aerosol-forming substrate that, when heated, releases volatile compounds that can form an aerosol. In an embodiment, the aerosol-generating article is removably coupled to an aerosol-generating device. The article may be disposable or reusable.

[0048] Aerosol-forming substrates may include solid aerosol-forming substrates.Solid aerosol-forming substrates may include tobacco-containing materials, and the tobacco-containing materials contain volatile tobacco flavor compounds released from the aerosol-forming substrate when heated.Solid aerosol-forming substrates may include non-tobacco materials.Solid aerosol-forming substrates may include tobacco-containing materials and do not contain tobacco materials.

[0049] Aerosol formation matrix can comprise liquid aerosol formation matrix.Liquid aerosol formation matrix can comprise the liquid of tobacco-containing material that contains volatile tobacco flavor component, can also be the liquid that comprises non-tobacco material.Liquid aerosol formation matrix can comprise water, solvent, ethanol, plant extract, spices, flavoring agent or vitamin mixture etc., and spices can comprise betel nut extract, menthol, European mint, green mint oil, various fruity fragrance components etc., but is not limited to this.Flavoring agent can comprise the composition that can provide various fragrance or local flavor to the user.Vitamin mixture can be the mixture that is mixed with at least one in vitamin A, vitamin B, vitamin C and vitamin E, but is not limited to this.

[0050] The aerosol generating device has a second accommodating cavity 111 inside, and at least a part of the aerosol generating product 2 can be combined in the second accommodating cavity 111. The aerosol generating device can be an electrically operated device, and the heating component 1 adapted for the aerosol generating device can be an electric heater, so the heating component 1 can generate heat when electricity is provided, and at least part of the heat is transferred to the aerosol generating product 2 in the second accommodating cavity 111, so that the aerosol generating product 2 is heated.

[0051] The aerosol generating device further includes a power source 3 and a circuit board 4. The power source 3 may include any suitable battery or battery cell. The circuit board 4 has one or more controllers 41. The circuit board 4 is electrically connected to the power source and the heating component 1 to control the power source 3 to provide power to the heating component 1. The circuit board 4 can also control other operations of the aerosol generating device, such as controlling a sensory prompter in the aerosol generating device to generate sensory signals such as sound, light or vibration.

[0052] The heating assembly 1 comprises a first tubular body 11, an airflow heater 12 and a lower bracket 131, and a first accommodating cavity in the first tubular body 11. The airflow heater 12 is used to heat the airflow so that at least part of the airflow flowing through the airflow heater 12 forms a hot airflow, and the hot airflow flows from the upstream end of the airflow heater 12 to the downstream end of the airflow heater 12, and then continues to flow downstream from the downstream end of the airflow heater 12, and then enters the aerosol generating article 2 in the second accommodating cavity 111, and heats the aerosol generating article 2, so that the aerosol-forming substrate in the aerosol generating article 2 generates an aerosol. The lower bracket 131 connects the airflow heater 12 and the first tubular body 11, and the lower bracket 131 is conducive to keeping at least part of the airflow heater 12 in the first accommodating cavity.

[0053] More specifically, the lower bracket 131 can support the airflow heater 12. At least a portion of the lower bracket 131 can be located inside the first tubular body 11. At least a portion of the lower bracket 131 can be clamped between the first tubular body 11 and the airflow heater 12, so that when the first tubular body 11 is assembled into the first tubular body 11, the airflow heater 12 can be protected and prevented from being worn.

[0054] The lower bracket 131 is arranged adjacent to the upstream end of the airflow heater 12. Therefore, carbon deposits are prevented from forming on the lower bracket 131, which is conducive to ensuring smooth air intake of the airflow heater 12. To this end, the lower bracket 131 has good thermal conductivity, which is 5 times the thermal conductivity of zirconia ceramics, and its thermal conductivity can be greater than 10W / (m·K). Suitable materials for the lower bracket 131 can include but are not limited to: metal, graphite or graphite alloy, etc., wherein the metal includes but is not limited to aluminum, aluminum alloy, stainless steel, copper, copper alloy or iron alloy, etc.

[0055] Therefore, not only can the lower bracket 131 be quickly cooled down after the airflow heater 12 stops heating the airflow, thereby reducing the baking of the condensate and oil on the lower bracket 131 by the lower bracket 131, but also preventing the condensate and oil from drying up to form a viscous substance or forming carbon deposits on the lower bracket 12. In addition, the lower bracket 131 can be quickly heated up when the airflow heater 12 heats the airflow, so that the condensate and oil that have not been completely discharged on the lower bracket 12 can be vaporized, which helps to prevent the condensate and oil from being vaporized and staying on the lower bracket 12 for a long time. After testing, using the heating component or aerosol generating device provided by the present application, after inhaling 1,000 aerosol generating products 2, the airflow heater 12 still has smooth air intake, and the heating component 1 and the aerosol generating device still have a small suction resistance, so that the user can have a long-term good suction experience, and the service life of the heating component 1 and the aerosol generating device can be extended. By using the heating component or aerosol generating device provided in the present application, the user can complete the puffing of approximately 2,000 aerosol generating products 2. Compared with the existing aerosol generating devices that cannot complete the puffing of 300 aerosol generating products 2, the heating component or aerosol generating device provided in the present application has a very long service life.

[0056] To further prevent aerosol, condensate and oil from adhering to the lower bracket 131, a non-stick layer may be provided on the surface of the lower bracket 131. Suitable non-stick layer materials include polytetrafluoroethylene (PTFE), glass, and hydrophobic / oleophobic materials or super hydrophobic / oleophobic materials exhibiting the so-called 'lotus effect'.

[0057] In one embodiment, please refer to Figure 2 and Figure 6 The heating assembly 1 further includes a support 132, which supports the lower bracket 131. In other words, there is no contact between the support 132 and the airflow heater 12. The support 132 indirectly supports the airflow heater 12 by supporting the lower bracket 131, so that at least a part of the airflow heater 12 can be kept in the first accommodating cavity. The support 132 can also support the first tubular body 11 at the same time. More specifically, the support 132 can support the lower end of the first tubular body 11 upward.

[0058] The support 132 has a first channel 1321 for guiding the air in the air inlet channel 201 to flow toward the airflow heater 12, so that at least part of the air flowing through the airflow heater 12 needs to flow through the support 132 first, so when the suction stops, part of the aerosol may flow back to the first airway 1321 and contact the support 132. In order to prevent the first airway 1321 from being blocked, the thermal conductivity of the support 132 is greater than 10W / (m·K), or the support 132 contains metal, stainless steel or graphite. Thus, the support 132 can heat up quickly when the airflow heater 12 is heated, and can cool down quickly when the airflow heater 12 stops heating, making it difficult to form carbon deposits on the support 132, thereby preventing the first airway 1321 from being blocked, which is conducive to ensuring that the air can smoothly enter the airflow heater 12. The surface of the support 132 may have a non-stick layer.

[0059] In one embodiment, reference may be made to Figure 3 The lower bracket 131 includes a support portion 1311 and a lower stop portion 1312. The support portion 1311 extends along the axial direction of the first tubular body 11 and abuts against the support 132, so that the support 132 supports the lower bracket 131. The lower stop portion 1312 extends along the radial direction of the first tubular body 11 and supports the airflow heater 12. Figure 3 and Figure 6 In the example shown, the lower stopper 1312 extends to the bottom of the airflow heater 12 and supports the upstream end of the airflow heater 12 upward, wherein air enters the airflow heater 12 from the upstream end of the airflow heater 12 and then leaves from the downstream end of the airflow heater 12.

[0060] In order to stably support the airflow heater 12, there may be a plurality of lower stoppers 1312. In order to reduce the contact area between the lower stopper 1312 and the upstream end of the airflow heater 12, and to prevent liquid from adhering between the lower stopper 1312 and the airflow heater 12 and thereby blocking the air holes 121 on the airflow heater 12, in one example, the end of the lower stopper 1312 away from the supporting portion 1311 is located outside the air holes 121 in the outermost row of the airflow heater 12, or the extension length of the lower stopper 1312 along the radial direction of the first tubular body 11 is less than 0.5 mm, for example, the extension length may be about 0.35 mm.

[0061] In one example, there are two lower stoppers 1312 symmetrically arranged, so as to satisfy the requirement of providing stable support for the airflow heater 12 and reduce the contact area between the lower stoppers 1312 and the upstream end of the airflow heater 12 .

[0062] The extension dimension of the lower stopper 1312 along the circumferential direction of the first tubular body 11 may also be reduced to further reduce the contact area between the lower stopper 1312 and the upstream end of the airflow heater 12 .

[0063] The lower stopper 1312 may be formed by extending from the supporting portion 1311 , and the lower stopper 1312 and the supporting portion 1311 may be integrally formed.

[0064] Since the lower bracket 131 has good thermal conductivity and the lower bracket 131 contacts the airflow heater 12, in order to reduce the amount of heat lost by the airflow heater 12 through the lower bracket 131, in one example, one or more hollow holes can be provided on the support portion 1311 to reduce the mass of the lower bracket 131, thereby reducing the consumption of heat released by the airflow heater 12 by the lower bracket 131 and increasing the thermal resistance of the lower bracket 131 to conduct the heat released by the airflow heater 12, which is helpful for energy saving.

[0065] In one example, the support portion 1311 has a plurality of support portions 1311 and the plurality of support portions 1311 are spaced apart from each other, so as to reduce the mass of the lower bracket 131 and increase the thermal resistance of the lower bracket 131 in conducting the heat released by the airflow heater 12. The dimension of the support portion 1311 extending along the circumference of the first tubular body 11 can be reduced, so that the support portion 1311 is roughly columnar or strip-shaped, so as to further reduce the mass of the lower bracket 131 and increase the thermal resistance of the lower bracket 131. For example, the spacing between two adjacent support portions 1311 along the circumference of the first tubular body 11 can be made greater than the dimension of any support portion 1311 extending along the circumference of the first tubular body 11. The number of support portions 1311 can be reduced to further reduce the mass of the lower bracket 131 and increase the thermal resistance of the lower bracket 131. For example, there can be two support portions 1311 that are arranged opposite to each other.

[0066] The lower bracket 131 may further include a connecting portion 1313, the connecting portion 1313 connecting the plurality of supporting portions 1311, and the connecting portion 1313 and the plurality of supporting portions 1311 may be integrally formed. The connecting portion 1313 may be clamped between the airflow heater 12 and the first tubular body 11. On the one hand, the connecting portion 1313 is prevented from being located upstream of the airflow heater 12, which helps prevent carbon deposits from being formed between the upstream end of the airflow heater 12 and the connecting portion 1313 to affect the airflow entering the airflow heater 12. On the other hand, the airflow heater 12 is spaced apart from the inner wall of the first tubular body 11, which can prevent the airflow heater 12 from being worn during the process of being installed in the first tubular body 11.

[0067] The connecting portion 1313 may be configured in a ring shape or may be disposed around the periphery of the airflow heater 12 , and the connecting portion 1313 may be in close contact with the inner wall of the first tubular body 11 .

[0068] The connection portion 1313 may have good integrity. In one example, the connection portion 1313 has one or more hollow holes to reduce the mass of the connection portion 1313, thereby reducing the consumption of heat released by the airflow heater 12 by the connection portion 1313, which is helpful for energy saving. In one example, the axial extension dimension of the connection portion 1313 along the first tubular body 11 is d, and the axial extension dimension of the airflow heater 12 along the first tubular body 11 is D, d≤D / 4, or d≤2mm, for example, D can be about 8mm, or for example, d can be about 0.8mm. The mass of the connection portion 1313 is reduced thereby. Since d has a smaller value, in order to increase the stability of the connection between the lower bracket 131 and the airflow heater 12, at least a portion of the support portion 1311 can be located between the first tubular body 11 and the airflow heater 12.

[0069] The connecting portion 1313 may have a smaller wall thickness, which may be between 0.15 mm and 0.6 mm, for example, the wall thickness of the connecting portion 1313 may be about 0.35 mm. The wall thickness h of the supporting portion 1311 may be between 0.15 mm and 0.6 mm, which may be equal to the wall thickness of the connecting portion 1313.

[0070] The specific heat capacity of the lower bracket 131 may be smaller than that of zirconia ceramics, thereby reducing the consumption of heat released by the airflow heater 12 by the lower bracket 131 and helping the lower bracket 131 to cool down quickly after the airflow heater 12 stops generating heat.

[0071] The thermal conductivity of the lower bracket 131 may be lower than the thermal conductivity of the airflow heater 12 to prevent the lower bracket 131 from causing the heat on the airflow heater 12 to be lost quickly due to the excessively high thermal conductivity. For example, the thermal conductivity of the lower bracket 131 may be lower than 200 W / (m·k), or lower than 150 W / (m·k), or lower than 100 W / (m·k). The thermal conductivity of the lower bracket 131 may be between 15 W / (m·k) and 30 W / (m·k).

[0072] In one embodiment, the airflow heater 12 comprises an air-conducting element having one or more air holes 121 and a heating element combined with the air-conducting element, the heating element can generate heat, and at least part of the heat generated by the heating element can be absorbed by the air-conducting element, so that the air-conducting element is heated and the temperature rises, and the air-conducting element heats the airflow flowing through the air holes 121 by releasing at least part of the heat absorbed from the heating element. In one example, the heating element is electrically connected to the power source 3 and generates Joule heat when power is obtained. In one example, a magnetic field generator is provided in the aerosol generating device, the magnetic field generator is electrically connected to the power source 3, and generates a changing magnetic field when power is obtained, and the heating element generates electromagnetic heating when penetrated by the changing magnetic field.

[0073] The thermal conductivity of the gas-conducting element may be greater than 10 W / (m·k), and the gas-conducting element may contain graphite, graphene or graphite alloy.

[0074] The heating element may be incorporated on the surface of the air conducting element, or at least a portion of the heating element may be embedded within the interior of the air conducting element.

[0075] In one embodiment, the air flow heater 12 includes an air guide element having one or more air holes 121 , and the air guide element includes conductive ceramic or graphite alloy, so that Joule heat can be generated when conducting electricity, and at least part of the Joule heat is used to heat the air flow passing through the air holes 121 .

[0076] In one embodiment, the air flow heater 12 includes an air-conducting element having one or more air holes 121, and the air-conducting element includes a sensor capable of generating electromagnetic heat in a changing magnetic field, so that when penetrated by the changing magnetic field, at least part of the electromagnetic heat generated is used to heat the air flow flowing through the air holes 121.

[0077] The thermal conductivity of the support 132 may be less than the thermal conductivity of the airflow heater 12. The thermal conductivity of the support 132 may be less than or equal to the thermal conductivity of the lower support 131. The support 132 and the lower support 131 may be made of the same material. The support 132 and the lower support 131 may be made of different materials.

[0078] In one embodiment, reference may be made to Figure 2 and Figure 6 There is a spacer cavity 14 between the airflow heater 12 and the support 132, which is fluidically connected to the first airway 1321 and the airflow heater 12, so that the airflow heater 12 and the support 132 are separated from each other by the spacer cavity 14. The airflow heater 12 is completely contained in the first tubular body 11, and there is a gap between the upstream end of the airflow heater 12 and the lower end of the first tubular body 11, so that at least part of the spacer cavity 14 is located in the first tubular body 11, so that the spacer cavity 14 can keep and insulate the airflow heater 12, which helps to reduce the heat loss rate of the airflow heater 12. In order to prevent the support 132 from accelerating the heat loss of the airflow heater 12, the support 132 is located outside the first tubular body 11.

[0079] As an example, see Figure 2 and Figure 6 The first tubular body 11 includes an insulated tube. The insulated tube may contain an insulating material or an air layer 112 may be provided in the tube wall of the insulated tube 11 .

[0080] The thermal insulation material refers to a material having a thermal conductivity of less than 100 W / (m·K) at 23°C and a relative humidity of 50%, preferably less than 40 W / (m·K) or less than 10 W / (m·K). For example, the thermal insulation material may be made of at least one of a PAEK material, a PI material, or a PBI material, wherein the PAEK material includes PEEK, PEKK, PEKEKK, or PEK material. For example, it may include but is not limited to glass fiber, glass felt, ceramic, silica, alumina, carbon, and ore, or any combination thereof.

[0081] The air interlayer 112 may be a normal pressure air interlayer, the air pressure therein may be substantially equal to the atmospheric pressure, or may be a negative pressure layer, the air pressure therein may be less than the atmospheric pressure.

[0082] At least part of the airflow heater 12 and at least part of the partition cavity 14 are located in the insulation tube, which can keep the airflow heater 12 and the partition cavity 14 inside it warm and insulate them, reduce the rate of heat loss and temperature drop, and improve the insulation effect of the partition cavity 14.

[0083] As an example, the inner wall of the first tubular body 11 includes a good thermal conductive material, which defines at least a portion of the boundary of the partition cavity 14, so that at least a portion of the cavity wall of the partition cavity 14 can be heated and cooled more quickly, which helps prevent carbon deposits from forming in the partition cavity 14 and is helpful for ensuring smooth air intake of the airflow heater 12.

[0084] Good thermal conductive materials can be understood as materials having a thermal conductivity of at least 10 W / (m·k) at 23°C and a relative humidity of 50%, preferably at least 40 W / (m·k), and more preferably at least 100 W / (m·k). Specifically, the good thermal conductive material is formed of a material having a thermal conductivity of at least 40 W / (m·k) at 23°C and a relative humidity of 50%, preferably at least 100 W / (m·k), more preferably at least 150 W / (m·k), and most preferably at least 200 W / (m·k). Suitable good thermal conductive materials include, but are not limited to: metals, graphite, graphene, aluminum, copper, zinc, steel, silver, thermally conductive polymers, or any combination or alloy thereof.

[0085] The surface of the good thermal conductive material may have a non-stick layer.

[0086] As an example, see Figure 2 and Figure 6 The supporting portion 1311 of the lower bracket 131 abuts against the inner wall of the first tubular body 11 and extends to be supported by the support 132 , and the supporting portion 1311 defines at least a portion of the boundary of the partition cavity 14 .

[0087] In one embodiment, reference may be made to Figure 2 and Figure 3 The support 132 includes an annular side wall 1322, and the inner surface of the annular side wall 1322 defines at least a portion of the boundary of the first channel 1321. The support 132 is provided with a first air inlet 1323 and an air outlet 1324, and at least a portion of the air can enter the first channel 1321 through the first air inlet 1323. The first channel 1321 is fluidically connected to the airflow heater 12 through the air outlet 1324.

[0088] The air inlet area of ​​the first air inlet 1323 may be smaller than the air outlet area of ​​the air outlet 1324, so that the air is decelerated when flowing through the first channel 1321. The decelerated air can be heated by the airflow heater 12 for a longer time when flowing through the airflow heater 12, thereby helping to fully heat the air flowing through the airflow heater 12. As an example, refer to Figure 2-Figure 5 , along the direction of air flowing from the first air inlet 1323 to the air outlet 1324, the inner diameter of at least a part of the annular side wall 1322 remains unchanged. As an example, it can be referred to Figure 6-Figure 8 , along the direction in which the air flows from the first air inlet 1323 to the air outlet 1324 , the inner diameter of at least a portion of the annular side wall 1322 gradually increases.

[0089] As an example, the first air inlet 1323 and the air outlet 1324 are arranged opposite to each other, wherein the air outlet 1324 is arranged toward the airflow heater 12, and the first air inlet 1323 can be arranged corresponding to the central area of ​​the airflow heater 12, and the central area of ​​the airflow heater 12 can be an area with a radius within 2 mm based on the central axis of the airflow heater 12. Thus, during suction, the air can enter the airflow heater 12 more evenly and be heated, which can prevent the air from mainly flowing through the air holes 121 at the edge of the airflow heater 12, thereby causing uneven heating of the air.

[0090] As an example, the annular sidewall 1322 is provided with a second air inlet 1325 for allowing air to enter the first channel 1321, the first air inlet 1323 and the air outlet 1324 are arranged on opposite sides of the annular sidewall 1322, and the second air inlet 1325 is arranged between the first air inlet 1323 and the air outlet 1324. The air inlet area of ​​the second air inlet 1325 may be smaller than the air outlet area of ​​the air outlet 1324. There may be a plurality of second air inlets 1325, which are evenly distributed on the annular sidewall 1322.

[0091] In such Figure 2-5In the illustrated embodiment, the support 132 further includes a support edge 1326 extending in the radial direction, the air outlet 1324 is formed on the support edge 1326, the support edge 1326 supports the lower bracket 131 and the first tubular body 11, and the annular side wall 1322 supports the support edge 1326, and the annular side wall 1322 can be integrally formed with the support edge 1326. Figure 6-8 In the illustrated embodiment, the inner surface of the annular side wall 1322 supports the lower bracket 131 , and the annular side wall 1322 supports the first tubular body 11 adjacent to the end of the first tubular body 11 , wherein the inner surface of the annular side wall 1322 may be an inclined surface.

[0092] In one embodiment, reference may be made to Figure 2 and Figure 6 The heating assembly 1 further comprises an upper bracket 15 connecting the airflow heater 12 and the first tubular body 11, the airflow heater 12 is clamped between the upper bracket 15 and the lower bracket 131, and a third channel 151 is formed in the upper bracket 15 to guide air to flow toward the second accommodating cavity 111, that is, toward the aerosol generating product 2. The thermal conductivity of the upper bracket 15 may be greater than 10 W / (m·K), or the upper bracket 15 may include metal, stainless steel or graphite.

[0093] As an example, the upper bracket 15 includes a shielding portion 152 extending toward the center of the first tubular body 11, and the third channel 151 is at least partially formed on the shielding portion 152, and the shielding portion 152 is spaced apart from the airflow heater 12, so that an airflow cavity is provided between the shielding portion 152 and the airflow heater 12, and the airflow cavity can prevent the shielding portion 152 from being too hot, which helps to prevent the bottom of the aerosol generating product 2 from being burnt.

[0094] As an example, the second accommodating cavity 111 is formed in the first tubular body 11, and the second accommodating cavity 111 is in fluid communication with the first accommodating cavity. The inner wall of the first tubular body 11 has a protruding portion 113 protruding toward the center of the first tubular body 11, and the protruding portion 113 abuts against the shielding portion 152. The extent of extension of the shielding portion 152 toward the center of the first tubular body 11 is greater than the extent of protrusion of the protruding portion 113 toward the center of the first tubular body 11. The shielding portion 152 and / or the protruding portion 113 abut against the bottom of the aerosol generating article 2.

[0095] In such Figure 2 and Figure 3In the illustrated embodiment, the upper bracket 15 further includes an upper stopper 153. The upper bracket 15 is disposed above the lower bracket 131, the upper stopper 153 abuts against the airflow heater 12 downward, and the lower stopper 1312 of the lower bracket 131 abuts against the airflow heater 12 upward. The upper bracket 15 further includes an embedding portion 154, which is clamped between the first tubular body 11 and the airflow heater 12, so that when the airflow heater 12 is assembled into the first accommodating cavity, the airflow heater 12 can be prevented from being worn. There can be a plurality of embedding portions 154, which are spaced apart from each other and dispersedly distributed on the periphery of the airflow heater 12.

[0096] In one embodiment, reference may be made to Figure 2 and Figure 6 The heating assembly 1 further includes a support plate 17 supporting the lower bracket 131 and a bottom cover 18 connected to the support plate 17. Specifically, the support plate 17 supports the support 13, so that the support plate 17 can limit the air intake area of ​​the first air inlet 1323.

[0097] A collecting chamber 19 is formed between the support plate 17 and the bottom cover 18. The lower bracket 131 supports the airflow heater 12 below the airflow heater 12, and the support 132 is arranged below the airflow heater 12. With reference to this direction, the collecting chamber 19 is arranged below the lower bracket 131 and the support plate 17. The support plate 17 has a first through hole 171 for fluidly connecting the collecting chamber 19 and the first channel 1321.

[0098] The lower bracket 131 and the support 132 can guide the aerosol, condensate and oil through the first through hole 171 to the collection chamber 19 which is farther from the airflow heater 12, so that carbon deposits are formed on the bottom cover 18, so that the carbon deposits are far away from the airflow heater 12, which helps to prevent the air holes 121 on the airflow heater 12 from being blocked. The collection chamber 19 can prevent liquid leakage. The spatial volume of the collection chamber 19 can be greater than the spatial volume of the first air channel 1321.

[0099] As an example, see Figure 2 The heating assembly 1 further includes a second tubular body 20 connected to the support plate 17, the lower bracket 131 and the first tubular body 11 are accommodated in the second tubular body 20, an air inlet channel 201 in communication with an external fluid is provided between the first tubular body 11 and the second tubular body 20, and the support plate 17 has a second through hole 172 in communication with the air inlet channel 201 and the collecting chamber 19. Referring to the track indicated by the arrow in FIG. 2 , the external air can flow through the air inlet channel 201, the second through hole 172, the collecting chamber 19, the first through hole 171, the first air inlet hole 1323 and the first channel 1321 in sequence, and then enter the airflow heater 12.

[0100] The first through hole 171 can limit the air intake area of ​​the first air intake hole 1323. Figure 2In the illustrated embodiment, the annular side wall 1322 is buckled onto the support plate 17, and the lower end of the annular side wall 1322 is opened to form a first air inlet 1323, the first air inlet 1323 is partially blocked by the support plate 17, and the aperture of the first air inlet 1323 is larger than the aperture of the first through hole 171, so that the air intake area of ​​the first air inlet 1323 depends on the hole area of ​​the first through hole 171.

[0101] The air inlet channel 201 is arranged between the first tubular body 11 and the second tubular body 20, so that the air inlet channel 201 is located above the collecting chamber 19, and the support plate 17 is arranged above the bottom cover 18, so that the first through hole 171 and the second through hole 172 are both located above the collecting chamber 19, so that the carbon deposits or dirt accumulation formed in the collecting chamber 19 will not block the first through hole 171 and the second through hole 172, so as to ensure that the air flow channel is unobstructed, which helps to increase the suction resistance of the aerosol generating device or the heating component 1. Among them, the air inlet channel 201, the second through hole 172, the collecting chamber 19, the first through hole 171, the first air inlet 1323 and the first channel 1321 constitute a part of the air flow channel in sequence.

[0102] As an example, see Figure 6 The support plate 17 has a plurality of ribs 173 extending toward the lower bracket 131 and supporting the lower bracket 131, and a second channel 174 is formed between two adjacent ribs 173 to fluidly connect the air inlet channel 201 and the first channel 1321. External air can flow through the air inlet channel 201, the second channel 174 and the first channel 1321 in sequence, and then enter the air flow heater 12.

[0103] Since the support plate 17 supporting the lower bracket 131 is located above the bottom cover 18, the second channel 174 is located above the collecting chamber 19, so that the carbon deposits or dirt accumulation formed in the collecting chamber 19 will not block the second channel 174. And the liquid in the second channel 174 can enter the collecting chamber 19 through the first through hole 171, so as to dry up and form dirt or carbon deposits in the collecting chamber 19. In this way, it can ensure that the airflow channel is unobstructed, which helps to increase the suction resistance of the aerosol generating device or the heating component 1. Among them, the air inlet channel 201, the second channel 174 and the first channel 1321 constitute parts of the airflow channel in sequence.

[0104] As an example, see Figure 2 and Figure 6 , the support plate 17 is integrally formed with the second tubular body 20. As an example, reference may be made to Figure 2 and Figure 6 The support plate 17 and the bottom cover 18 are connected by assembly. As an example, the support plate 17, the second tubular body 20 and the bottom cover 18 are integrally formed.

[0105] As an example, see Figure 8 The lower bracket 131 and the first tubular body 11 are assembled into a whole, and the lower bracket 131 and the support plate 17 are separable. Therefore, when assembling, the first tubular body 11, the airflow heater 12 and the lower bracket 131 are first assembled to form a whole, and then the whole is assembled into the second tubular body 20.

[0106] More specifically, the support 132 may have a claw 1327 , which is embedded in the first tubular body 11 and abuts against the inner wall of the first tubular body 11 , so that the support 132 is fixed on the first tubular body 11 .

[0107] As an example, see Figure 3 and Figure 7 The support 132 and the lower bracket 131 are separable. It should be noted that the support 132 and the lower bracket 131 can be integrally formed.

[0108] The above-mentioned heating component and aerosol generating device connect the airflow heater and the lower bracket of the first tubular body, and its thermal conductivity is greater than 10W / (m·K), so that the lower bracket can be quickly cooled down after the airflow heater stops heating the airflow, thereby reducing the baking of condensate and oil adhering to its surface; therefore, it can effectively prevent the formation of carbon deposits on the lower bracket, which helps to keep the airflow heater unobstructed, and is beneficial for preventing the increase of the suction resistance of the heating component and the aerosol generating device, so that the user can have a long-term good smoking experience and can extend the service life of the heating component and the aerosol generating device.

[0109] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application, but are not limited to the embodiments described in the specification. Furthermore, it is possible for a person of ordinary skill in the art to make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to the present application.

Claims

1. A heating component, characterized in that: include: A first tubular body having a first accommodating cavity disposed therein; an airflow heater for heating an airflow flowing from an upstream end thereof to a downstream end thereof to form a hot airflow for heating the aerosol generating product, wherein at least a portion of the airflow heater is retained in the first accommodating chamber; and a lower bracket, disposed adjacent to the upstream end of the airflow heater and connecting the first tubular body and the airflow heater; Wherein, the thermal conductivity of the lower bracket is greater than 10 W / (m·K).

2. The heating assembly according to claim 1, characterized in that The lower bracket comprises metal or graphite, and the metal comprises stainless steel.

3. The heating assembly according to claim 1, characterized in that The thermal conductivity of the lower bracket is less than the thermal conductivity of the airflow heater; and / or The specific heat capacity of the lower bracket is smaller than the specific heat capacity of the zirconia ceramic.

4. The heating assembly according to claim 1, characterized in that The heating assembly further comprises a support, the support supporting the lower bracket and the first tubular body, and a first channel for guiding air to flow toward the airflow heater is formed on the support.

5. The heating assembly according to claim 4, characterized in that The support meets at least one of the following conditions: The thermal conductivity of the support is greater than 10W / (m·K); The support comprises metal or graphite, and the metal comprises stainless steel; The thermal conductivity of the support is less than the thermal conductivity of the airflow heater; or The thermal conductivity of the support is less than or equal to the thermal conductivity of the lower support.

6. The heating assembly according to claim 4, characterized in that A partition cavity is provided between the airflow heater and the support for fluidly connecting the first air passage and the airflow heater, and at least a part of the partition cavity is located in the first tubular body.

7. The heating assembly according to claim 6, characterized in that The first tubular body comprises a heat-insulating tube, and at least a portion of the spacing cavity and the first accommodating cavity are both located in the heat-insulating tube.

8. The heating assembly according to claim 6, characterized in that The inner wall of the first tubular body comprises a good thermal conductive material, the thermal conductivity of the good thermal conductive material is greater than 10 W / (m·K), or the good thermal conductive material comprises metal or graphite, the metal includes stainless steel, and the good thermal conductor defines at least part of the boundary of the compartment cavity.

9. The heating assembly according to claim 6, characterized in that The lower bracket includes a supporting portion, the supporting portion abuts against an inner wall of the first tubular body and extends along the inner wall of the first tubular body until being supported by the support, and the supporting portion defines at least a portion of a boundary of the compartment cavity.

10. The heating assembly according to claim 4, characterized in that The lower bracket further includes a support portion extending along the axial direction of the first tubular body and a lower stop portion extending from the support portion along the radial direction of the first tubular body, the lower stop portion supports the airflow heater, and the support supports the support portion.

11. The heating assembly according to claim 10, characterized in that The lower bracket further includes a connecting portion. The supporting portions are multiple and spaced apart from each other. The multiple supporting portions are connected by the connecting portion, and the connecting portion is clamped between the first tubular body and the airflow heater.

12. The heating assembly according to claim 11, characterized in that The connecting portion has an axial extension dimension d along the first tubular body, and the airflow heater has an axial extension dimension D along the first tubular body, d≤D / 4, or d≤2 mm.

13. The heating assembly according to claim 10, characterized in that The distance between two adjacent support portions along the circumferential direction of the first tubular body is greater than the dimension of any support portion extending along the circumferential direction of the first tubular body.

14. The heating assembly according to claim 10, characterized in that The support portion has a hollow hole; and / or the support portion has a thickness h, 0.15mm≤h≤0.6mm.

15. The heating assembly according to claim 4, characterized in that The support is provided with a first air inlet for allowing air to enter the first channel and an air outlet for fluidly connecting the first channel and the air flow heater at opposite ends thereof, and an air inlet area of ​​the first air inlet is smaller than an air outlet area of ​​the air outlet.

16. The heating assembly according to claim 15, characterized in that The support includes an annular side wall, the first air inlet and the air outlet are located on opposite sides of the annular side wall, the annular side wall defines at least a portion of the boundary of the first channel, and a second air inlet is opened on the annular side wall to allow air to enter the first channel.

17. The heating assembly according to claim 4, characterized in that The support supports the airflow heater below the airflow heater; The heating assembly also includes a support plate supporting the support below and a bottom cover connected below the support plate, a collecting chamber is formed between the support plate and the bottom cover, the collecting chamber is arranged below the bracket, and the support plate has a first through hole for fluidly connecting the collecting chamber and the first channel.

18. The heating assembly of claim 17, wherein: The heating assembly further comprises a second tubular body, in which the lower bracket, the support and the first tubular body are accommodated; An air inlet passage connected to an external fluid is provided between the first tubular body and the second tubular body, and a second through hole connected to the air inlet passage and the collecting chamber by fluid is provided on the support plate.

19. The heating assembly of claim 17, wherein: The heating assembly further comprises a second tubular body, in which the lower bracket, the support and the first tubular body are accommodated; An air inlet passage connected to an external fluid is provided between the first tubular body and the second tubular body, a plurality of convex ribs supporting the support are provided on the support plate, and a second passage connecting the air inlet passage and the first passage by fluid is formed between two adjacent convex ribs.

20. The heating assembly of claim 4, wherein: The surface of the lower bracket or the support has a non-stick layer.

21. The heating assembly of claim 1, wherein: The heating assembly further comprises an upper bracket connecting the airflow heater and the first tubular body, the airflow heater is clamped between the upper bracket and the lower bracket, and a third channel for guiding air to flow toward the aerosol generating product is formed in the upper bracket; The thermal conductivity of the upper bracket is greater than 10 W / (m·K), or the upper bracket comprises metal or graphite, and the metal comprises stainless steel.

22. The heating assembly of claim 21, wherein: The upper bracket includes a shielding portion extending in a radial direction of the first tubular body, at least a portion of the third channel is formed on the shielding portion, and the shielding portion is spaced apart from the airflow heater.

23. The heating assembly of claim 1, wherein: A second accommodating cavity in fluid communication with the first accommodating cavity is further disposed in the first tubular body, and the second accommodating cavity is used to accommodate at least a portion of the aerosol generating article.

24. A heating component, characterized in that: include an insulating tube, wherein a first accommodating cavity and a second accommodating cavity are arranged in communication with each other, wherein the second accommodating cavity is used to accommodate at least a portion of the aerosol generating product; an airflow heater, comprising an air guide element and a heating element, wherein the heating element is combined with the air guide element to heat the air guide element, the air guide element has one or more air holes in fluid communication with the second accommodating chamber, and the air guide element is configured to release heat to heat air flowing through the air holes, so that the air forms a hot airflow for heating the aerosol generating article; A lower bracket, connecting the heat insulation tube and the airflow heater; and A support, supporting the lower bracket to hold at least a portion of the airflow heater in the first accommodating cavity; The lower bracket comprises stainless steel.

25. An aerosol generating device, characterized in that: The heating component comprises the heating component according to any one of claims 1 to 24, further comprising a power supply component configured to provide electric power to the airflow heater for heating the airflow.

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