WO2021223716A1 - 发热体以及包含该发热体的气溶胶生成装置 - Google Patents

发热体以及包含该发热体的气溶胶生成装置 Download PDF

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Publication number
WO2021223716A1
WO2021223716A1 PCT/CN2021/091946 CN2021091946W WO2021223716A1 WO 2021223716 A1 WO2021223716 A1 WO 2021223716A1 CN 2021091946 W CN2021091946 W CN 2021091946W WO 2021223716 A1 WO2021223716 A1 WO 2021223716A1
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WIPO (PCT)
Prior art keywords
heating element
base
element according
electric heating
aerosol
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PCT/CN2021/091946
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English (en)
French (fr)
Inventor
戚祖强
雷宝灵
罗家懋
徐中立
李永海
Original Assignee
深圳市合元科技有限公司
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Application filed by 深圳市合元科技有限公司 filed Critical 深圳市合元科技有限公司
Priority to US17/923,898 priority Critical patent/US20230189401A1/en
Priority to EP21799679.2A priority patent/EP4147588A4/en
Publication of WO2021223716A1 publication Critical patent/WO2021223716A1/zh

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/0033—Heating devices using lamps
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/20—Devices using solid inhalable precursors
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
    • A24F40/46—Shape or structure of electric heating means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/016—Heaters using particular connecting means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/021—Heaters specially adapted for heating liquids
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/032—Heaters specially adapted for heating by radiation heating

Definitions

  • This application relates to the technical field of smoking articles, and in particular to a heating element and an aerosol generating device containing the heating element.
  • Smoking articles such as cigarettes and cigars burn tobacco during use to produce smoke. Attempts have been made to provide alternatives to these tobacco-burning articles by producing products that release compounds without burning. Examples of such products are so-called heat-not-burn products, which release compounds by heating the tobacco instead of burning the tobacco.
  • An existing aerosol generating device uses a ceramic heating element to heat the cigarette. Specifically, a heating wire is arranged in the ceramic tube. After the heating wire is energized, heat is generated and conducted to the ceramic tube, and the ceramic tube further heats the cigarette.
  • the problem of the aerosol generating device is that the heating effect of the ceramic heating element is poor, the components in the cigarette are not released sufficiently, and the user's smoking experience is poor.
  • the embodiments of the present application aim to provide a heating element and an aerosol generating device containing the heating element, so as to solve the problem of poor heating effect of the heating element in the prior art.
  • One aspect of the present application provides a heating element for heating an aerosol-forming substrate to generate an aerosol, including:
  • Electric heating element used to receive the electric power of the power supply to generate heat
  • An infrared radiator is arranged on the base in a thermally conductive manner with the electric heating element; the infrared radiator is used to receive the heat generated by the electric heating element to heat up and generate infrared rays, and at least radiately heat the aerosol to form the substrate .
  • an aerosol generating device which includes a heating chamber and a heating element arranged in the heating chamber.
  • the heating element provided by the present application and the aerosol generating device containing the heating element receive the heat generated by the electric heating element by the infrared radiator to heat up to generate infrared rays, and at least radiatively heat the aerosol to form the substrate; since infrared radiation has a certain degree of penetration Permeability and good heating effect on the cigarette, the components in the cigarette can be fully released, and the user's smoking experience is improved.
  • Figure 1 is a schematic diagram of a heating element provided by an embodiment of the present application.
  • Figure 2 is an exploded schematic diagram of a heating element provided by an embodiment of the present application.
  • Figure 3 is a schematic cross-sectional view of a heating element provided by an embodiment of the present application.
  • Figure 4 is a schematic diagram of a holder provided by an embodiment of the present application.
  • Figure 5 is a schematic diagram of a substrate provided by an embodiment of the present application.
  • Fig. 6 is a schematic diagram of a base provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of another base provided by an embodiment of the present application.
  • Fig. 8 is a schematic diagram of an aerosol generating device provided by an embodiment of the present application.
  • an embodiment of the present application provides a heating element 10 for heating an aerosol-forming substrate to generate aerosol.
  • the heating element 10 includes a holder 1, an electric heating element 2, a base 3, a sealing member 4, The base 5 and the infrared radiator 6.
  • the holder 1 is used to keep the electric heating element 2 fixed; the electric heating element 2 is used to receive electric power from the power source to generate heat.
  • the holder 1 is a cylindrical tube, and the inside of the holder 1 is hollow and both ends are open to form an inner hole 11.
  • the electric heating element 2 at least includes a spiral section 21 arranged on the outer surface of the holder 1 and an extension section 22 located in the inner hole 11 and extending along the axial direction of the holder 11. Further, the spiral section 21 and the extension section 22 of the electric heating element 2 at least partially overlap in the axial direction of the holder 1, so that the spiral section 21 wound on the outer surface of the holder 1 can have a larger heating area and can be uniform Heat generation, the electric heating element 2 located in the extension section 22 of the inner hole 11 of the holder 1 can also generate heat to increase the heat generation and ensure sufficient heat supply. Due to the arrangement of the spiral section 21 and the extension section 22, there is no electrical contact between the electric heating elements 2. After the electric heating elements 2 receive power, a short circuit between the electric heating elements 2 can be avoided.
  • the material of the holder 1 can be a high-temperature resistant insulating material, such as ceramics, alumina, zirconia, magnesia, silicon oxide, etc., which are not specifically limited.
  • the material of the electric heating element 2 the following factors can be referred to: 1), the resistivity is large, the size meets the requirements, has a relatively large infrared radiation area, and the radiation efficiency is high; 2), it is relatively stable in the air, heated to 180°C -350°C will not oxidize.
  • the electric heating element 2 can not only be used as a resistor to receive electric power from the power source to generate heat, but also can be used as a temperature sensor.
  • the holder 1 may also be sheet-shaped, and the sheet-shaped holder 1 keeps the electric heating element 2 fixed, and isolates the electric heating element 2 to prevent the electric heating element 2 from being short-circuited after receiving power. For example: select alumina material, cut it into flakes, and set the electric heating element 2 on the flake alumina.
  • the holder 1 may also be a high-temperature resistant insulating powder material, such as magnesium oxide powder, silicon oxide powder, aluminum oxide powder, and the like.
  • the insulating powder material can be filled in the receiving cavity 31 of the base 3 to keep the electric heating element 2 fixed, and isolate the electric heating element 2 to prevent the electric heating element 2 from being short-circuited after receiving power.
  • the base 3 is used for inserting into the aerosol forming matrix, for example, inserting into a cigarette.
  • the base 3 can be made of materials with high temperature resistance and high infrared transmittance, including but not limited to the following materials: quartz glass, sapphire, silicon carbide, magnesium fluoride ceramics, yttrium oxide ceramics, magnesium aluminum spinel ceramics , Yttrium aluminum garnet single crystal, germanium single crystal and so on.
  • the base 3 is made of quartz glass. Quartz glass has low surface free energy, so smoke slag is not easy to adhere to the outer surface of the quartz glass, and it is easy to clean.
  • the base 3 can also be selected from metals, alloys and other materials.
  • An aerosol-forming substrate is a substrate capable of releasing volatile compounds that can form an aerosol. Such volatile compounds can be released by heating the aerosol to form a matrix.
  • the aerosol-forming substrate can be solid or liquid or include solid and liquid components.
  • the aerosol-forming substrate can be adsorbed, coated, impregnated or otherwise loaded onto the carrier or support.
  • the aerosol-forming substrate may include nicotine.
  • the aerosol-forming substrate may include tobacco, for example, may include a tobacco-containing material containing volatile tobacco flavor compounds that are released from the aerosol-forming substrate when heated.
  • a preferred aerosol-forming substrate may include a homogeneous tobacco material, such as deciduous tobacco.
  • the aerosol-forming substrate may include at least one aerosol-forming agent.
  • the aerosol-forming agent may be any suitable known compound or mixture of compounds. In use, the compound or mixture of compounds is beneficial to stabilize the formation of aerosol, And it is basically resistant to thermal degradation at the operating temperature of the aerosol generating system.
  • Suitable aerosol forming agents are well known in the art and include, but are not limited to: polyols, such as triethylene glycol, 1,3-butanediol, and glycerol; esters of polyols, such as glycerol mono-, di- or triacetate ; And fatty acid esters of mono-, di-, or polycarboxylic acids, such as dimethyl dodecanedioate and dimethyltetradecanedioate.
  • Preferred aerosol forming agents are polyhydric alcohols or mixtures thereof, such as triethylene glycol, 1,3-butanediol and most preferably glycerol.
  • the base 3 is cylindrical, preferably cylindrical.
  • a receiving cavity 31 is formed hollow inside the base 3, and the receiving cavity 31 is used for accommodating the holder 1 and the electric heating element 2.
  • the length of the receiving cavity 31 is equal to or slightly larger than the length of the holding member 1 to ensure that the holding member 1 can be completely received in the receiving cavity 31.
  • the shape of the accommodating cavity 31 matches the shape of the base 3 so as to limit the position of the holder 1 and ensure that the electric heating element 2 is kept in a proper position of the accommodating cavity 31.
  • the base 3 includes an open end 32 and a closed end 33.
  • the holder 1 and the electric heating element 2 are placed in the receiving cavity 31 from the open end 32.
  • the spiral section 21 of the electric heating element 2 is located between the base 3 and the holder 1.
  • the electrode connection end extends from the open end 32 to the outside of the base 3.
  • the heating element 10 further includes a first pin line 23 and a second pin line 24; one end of the first pin line 23 is connected to the spiral section 21, and one end of the second pin line 24 is connected to the extension section 22, The other end of the first lead wire 23 and the other end of the second lead wire 24 both extend from the open end 32 to the outside of the base 3.
  • the lead wire and the electric heating element 2 can be fixedly connected by argon arc welding or laser welding.
  • connection point between one end of the first pin line 23 and the spiral section 21 is the first connection point (not shown in the drawings), and the connection point between one end of the second pin line 24 and the extension section 22 is The second connection point (not shown in the drawings), the first connection point and the second connection point are both located in the receiving cavity 31.
  • the distance between the first connection point and the open end 32 is a first distance
  • the distance between the second connection point and the open end 32 is a second distance
  • the first distance and the first distance The smaller distance between the two distances is between 1 mm and 3 mm.
  • the first lead wire 23 and the second lead wire 24 can be made of materials with lower resistivity, such as nickel wire.
  • Nickel wire has good corrosion resistance and oxidation resistance.
  • the closed end 33 is protruded with a protrusion 331
  • the protrusion 331 is tapered
  • the protrusion 331 is formed by extending the base 3 from the closed end 33.
  • the provision of the protrusion 331 can facilitate the insertion of the base 3 into the cigarette and increase the contact area between the base 3 and the cigarette.
  • the protrusion 331 is hollow and communicates with the accommodating cavity 31, so that the heat generated by the heating element 2 is better conducted to the cigarette through the protrusion 331, so as to prevent the cigarette from being unevenly heated at the protrusion 331 and affecting the smoke. bake.
  • the sealing member 4 can be used to seal the open end 32, so that the electric heating element 2 and the holder 1 are stably placed in the base 3, reducing heating elements. Loss of internal heat.
  • the sealing member 4 can be made of magnesium oxide, silicon oxide, aluminum oxide and other materials for sealing and insulation.
  • the heating element 10 further includes a base 5, the end surface of the open end 32 of the base 3 abuts on the base 5, and the first lead wire 23 and the second lead wire 24 penetrate the sealing member 4 and the base 5.
  • the base 5 can be made of a ceramic material with low thermal conductivity, such as zirconia, to prevent heat conduction and reduce the temperature of the casing of the aerosol generating device.
  • the base 5 is cylindrical, and may be cylindrical, quadrangular prism, hexagonal prism, or the like.
  • the base 5 is recessed with a pocket 51, the open end 32 of the base 3 is fixed in the pocket 51, and the bottom of the pocket 51 is provided with a through hole for the first lead wire 23 and the second lead wire 24 to pass through. ⁇ 511.
  • the holder 1 can be abutted against the bottom of the container 51 to limit the holder 1 at the center position in the base 3 so that the electric heating elements 2 are evenly distributed in the base 3, which is beneficial to uniformly heating the tobacco shreds. As shown in FIG.
  • the through hole 511 may be a round hole, and the diameter of the round hole is smaller than the diameter of the holder 1 to ensure that the holder 1 does not slip into the through hole 511 when abutting against the bottom of the pocket 51.
  • the through holes 511 can also be two round holes with a diameter slightly larger than the diameter of the heating element 2.
  • the first lead wire 23 and the second lead wire 24 respectively pass through the two round holes to facilitate the External power connection.
  • the infrared radiator 6 is used to receive the heat generated by the electric heating element 2 to heat up to generate infrared rays, and at least radiatively heat the aerosol to form a substrate. Since infrared radiation has a certain degree of penetrability, it has a good heating effect on the cigarette, and the components in the cigarette can be fully released, which improves the user's smoking experience.
  • the infrared radiator 6 is an infrared radiation powder material filled in the receiving cavity.
  • the infrared radiator 6 can be made of materials with high infrared radiance, such as oxides, carbon materials, carbides, and nitrides. Specifically as follows:
  • Metal oxides and multi-component alloy oxides including: iron oxide, aluminum oxide, chromium oxide, indium oxide, lanthanum oxide, cobalt oxide, nickel oxide, and nickel oxide Antimony, antimony pentoxide, titanium dioxide, zirconium dioxide, manganese dioxide, ceria, copper oxide, zinc oxide, magnesium oxide, calcium oxide, molybdenum trioxide, etc.; it can also be two or more of the above metals A combination of oxides; it can also be a ceramic material with a unit cell structure such as spinel, perovskite, olivine, etc.
  • the emissivity of carbon materials is close to that of a black body, and it has a higher infrared emissivity.
  • Carbon materials including: graphite, carbon fiber, carbon nanotubes, graphene, diamond-like films, etc.
  • Carbides including: silicon carbide, silicon carbide has high emissivity in a larger infrared wavelength range (2.3 microns-25 microns), and is a good near full-band infrared radiation material; in addition, there are tungsten carbide and iron carbide , Vanadium carbide, titanium carbide, zirconium carbide, manganese carbide, chromium carbide, niobium carbide, etc., all have high infrared emissivity (MeC phase does not have strict stoichiometric composition and chemical formula).
  • Nitrides including: metal nitrides and non-metal nitrides, where metal nitrides include: titanium nitride, titanium carbonitride, aluminum nitride, magnesium nitride, tantalum nitride, vanadium nitride, etc.; non-metal nitrides Including: boron nitride, phosphorus pentanitride, silicon nitride (Si3N4), etc.
  • inorganic non-metallic materials include: silicon dioxide, silicate (including phosphosilicate, borosilicate, etc.), titanate, aluminate, phosphate, boride, chalcogenide, etc.
  • the infrared radiator 6 may be an infrared radiation film layer formed on the outer surface of the base 3, and may be formed on the outer surface of the base 3 by means of physical vapor deposition.
  • the base 3 can be selected from metals, alloys and other materials.
  • a glaze layer can also be provided on the outer surface of the base 3, and the glaze layer can protect the infrared radiation film layer and prevent the infrared radiation film layer from being scratched.
  • an embodiment of the present application also provides an aerosol generating device.
  • the aerosol generating device includes a heating chamber 20 and a heating element 10 disposed in the heating chamber 20.
  • the aerosol generating device further includes a battery 30, the heating element 10 is electrically connected to the battery 30, and the battery 30 provides electric power to the electric heating element 2 to generate heat.
  • the battery 30 may be, but is not limited to, a lithium iron phosphate (LiFePO4) battery.
  • the battery 30 may be a lithium cobalt oxide (LiCoO2) battery or a lithium titanate battery; the battery 30 may be a rechargeable battery or a disposable battery.
  • the heating element 10 of the embodiment of the present application and the aerosol generating device containing the heating element 10 receive the heat generated by the electric heating element through the infrared radiator to heat up to generate infrared rays, and at least radiatively heat the aerosol to form the substrate; Certain penetrability, good heating effect on the cigarettes, the ingredients in the cigarettes can be fully released, and the user's smoking experience is improved.

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Abstract

一种发热体（10）以及包含该发热体（10）的气溶胶生成装置，该发热体（10）包括：电热元件（2），用于接受电源的电功率产生热量；基体（3），用于插入气溶胶形成基质中；基体（3）的内部形成有收容腔（31），收容腔（31）用于收容电热元件（2）；红外辐射体（6），与电热元件（2）导热地设置在基体（3）上；红外辐射体（6）用于接收电热元件（2）产生的热量加热升温产生红外线，并至少以辐射方式加热气溶胶形成基质；由于红外辐射具有一定的穿透性，对烟支的加热效果好，烟支中的成分能够得到释放地充分，提升了用户的抽吸体验。

Description

发热体以及包含该发热体的气溶胶生成装置
相关申请的交叉参考
本申请要求于2020年05月06日提交中国专利局，申请号为202020720254.1，名称为“发热体以及包含该发热体的气溶胶生成装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及烟具技术领域，尤其涉及一种发热体以及包含该发热体的气溶胶生成装置。
背景技术
诸如香烟和雪茄的吸烟物品在使用期间燃烧烟草以产生烟雾。已经尝试通过产生在不燃烧的情况下释放化合物的产品来为这些燃烧烟草的物品提供替代物。此类产品的示例是所谓的加热不燃烧产品，其通过加热烟草而不是燃烧烟草来释放化合物。
现有的一种气溶胶生成装置利用陶瓷发热体对烟支进行加热。具体地，在陶瓷管内设置发热丝，发热丝通电后产生热量传导到陶瓷管上，陶瓷管进而对烟支进行加热。该气溶胶生成装置存在的问题是，陶瓷发热体加热效果差，烟支中的成分释放不充分，用户抽吸体验差。
申请内容
本申请实施例旨在提供发热体以及包含该发热体的气溶胶生成装置，以解决现有技术中的发热体加热效果差的问题。
本申请一方面提供一种发热体，用于对气溶胶形成基质进行加热以生成气溶胶，包括：
电热元件，用于接受电源的电功率产生热量；
基体，用于插入所述气溶胶形成基质中；所述基体的内部形成有收容腔，所述收容腔用于收容所述电热元件；
红外辐射体，与所述电热元件导热地设置在所述基体上；所述红外辐射体用于接收所述电热元件产生的热量加热升温产生红外线，并至少 以辐射方式加热所述气溶胶形成基质。
本申请另一方面提供一种气溶胶生成装置，包括加热腔室以及设置于该加热腔室内的发热体。
本申请提供的发热体以及包含该发热体的气溶胶生成装置，通过红外辐射体接收电热元件产生的热量加热升温产生红外线，并至少以辐射方式加热气溶胶形成基质；由于红外辐射具有一定的穿透性，对烟支的加热效果好，烟支中的成分能够得到释放地充分，提升了用户的抽吸体验。
附图说明
一个或多个实施例通过与之对应的附图中的图片进行示例性说明，这些示例性说明并不构成对实施例的限定，附图中具有相同参考数字标号的元件表示为类似的元件，除非有特别申明，附图中的图不构成比例限制。
图1是本申请实施例提供的发热体示意图；
图2是本申请实施例提供的发热体的分解示意图；
图3是本申请实施例提供的发热体的剖视示意图；
图4是本申请实施例提供的保持件示意图；
图5是本申请实施例提供的基体示意图；
图6是本申请实施例提供的底座示意图；
图7是本申请实施例提供的另一底座示意图；
图8是本申请实施例提供的气溶胶生成装置示意图。
具体实施例方式
应当理解，此处所描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。为了便于理解本申请，下面结合附图和具体实施方式，对本申请进行更详细的说明。需要说明的是，当元件被表述“固定于”另一个元件，它可以直接在另一个元件上、或者其间可以存在一个或多个居中的元件。当一个元件被表述“连接”另一个元件，它可以是直接连接到另一个元件、或者其间可以存在一个或多个居中的元件。本说明书所使用的术语“上”、“下”、“左”、“右”、“内”、“外”以及类似的表述只是为了说明的目的。
除非另有定义，本说明书所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本说明书中在本申请 的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是用于限制本申请。本说明书所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。
参照图1-3，本申请实施例提供一种发热体10，用于对气溶胶形成基质进行加热以生成气溶胶，发热体10包括保持件1、电热元件2、基体3、密封件4、底座5以及红外辐射体6。
保持件1用于使电热元件2保持固定；电热元件2用于接受电源的电功率产生热量。
如图4所示，在本实施例中，保持件1为圆柱形管，保持件1内部中空且两端均为开口以形成内孔11。电热元件2至少包括设置于保持件1外表面上的螺旋段21和位于内孔11中沿保持件11轴向延伸的延伸段22。进一步地，电热元件2的螺旋段21和延伸段22在保持件1的轴向上至少部分重叠，这样缠绕在保持件1外表面上的螺旋段21能够具有较大的发热面积，并且可以均匀发热，电热元件2位于保持件1内孔11的延伸段22也可以发热，以加大发热量，保证足够的热量供应。由于螺旋段21和延伸段22的设置，使得电热元件2之间没有电性接触，在电热元件2接受电源之后，可避免电热元件2之间短路。
在本实施例中，保持件1的材料可选用耐高温绝缘材料，例如：陶瓷、氧化铝、氧化锆、氧化镁、氧化硅等等，具体地不作限定。选择电热元件2材料时，可参考以下因素：1)、电阻率较大，尺寸符合要求，具有相对较大的红外辐射面积，辐射效率高；2)、在空气中比较稳定，加热到180℃-350℃不会发生氧化。具体地，可选用钨丝、镍铬丝、铁铬铝丝、钛丝、镍丝、镍铁合金丝、碳纤维等；优选地，选用镍铬丝、钛丝。选用钛丝时，电热元件2既可作为电阻接受电源的电功率产生热量，又可以用作温度传感器。
在其他示例中，保持件1也可以为片状，片状保持件1使电热元件2保持固定，并将电热元件2隔离以防止电热元件2接受电源之后短路。例如：选用氧化铝材料，将其裁成片状，电热元件2架设在片状氧化铝上。
在其他示例中，保持件1也可以为耐高温的绝缘粉体材料，例如：氧化镁粉、氧化硅粉、氧化铝粉等。绝缘粉体材料可以填充在基体3的收容腔31内使得电热元件2保持固定，并将电热元件2隔离以防止电热元件2接受电源之后短路。
基体3用于插入气溶胶形成基质中，例如：插入到烟支中。基体3可以选用耐高温且具有较高的红外线透过率的材料制成，包括但不限于 以下材料：石英玻璃、蓝宝石、碳化硅、氟化镁陶瓷、氧化钇陶瓷、镁铝尖晶石陶瓷、钇铝石榴石单晶、锗单晶等等。优选的，基体3由石英玻璃制成。石英玻璃具有低表面自由能，烟渣不容易附着石英玻璃的外表面，容易清洁。基体3还可以选用金属、合金等材料。
气溶胶形成基质是一种能够释放可形成气溶胶的挥发性化合物的基质。这种挥发性化合物可通过加热该气溶胶形成基质而被释放出来。气溶胶形成基质可以是固体或液体或包括固体和液体组分。气溶胶形成基质可吸附、涂覆、浸渍或以其它方式装载到载体或支承件上。
气溶胶形成基质可以包括尼古丁。气溶胶形成基质可以包括烟草，例如可以包括含有挥发性烟草香味化合物的含烟草材料，当加热时所述挥发性烟草香味化合物从气溶胶形成基质释放。优选的气溶胶形成基质可以包括均质烟草材料，例如落叶烟草。气溶胶形成基质可以包括至少一种气溶胶形成剂，气溶胶形成剂可为任何合适的已知化合物或化合物的混合物，在使用中，所述化合物或化合物的混合物有利于稳定气溶胶的形成，并且对在气溶胶生成系统的操作温度下的热降解基本具有抗性。合适的气溶胶形成剂是本领域众所周知的，并且包括但不限于：多元醇，例如三甘醇，1,3-丁二醇和甘油；多元醇的酯，例如甘油单、二或三乙酸酯；和一元、二元或多元羧酸的脂肪酸酯，例如二甲基十二烷二酸酯和二甲基十四烷二酸酯。优选的气溶胶形成剂是多羟基醇或其混合物，例如三甘醇、1,3-丁二醇和最优选的丙三醇。
如图5所示，在本实施例中，基体3呈柱状，优选为圆柱筒状。基体3内部中空形成有收容腔31，收容腔31用于收容保持件1和电热元件2。收容腔31的长度等于或略大于保持件1的长度，以保证保持件1可完全收容于收容腔31内。收容腔31的形状与基体3的形状相匹配，以便于对保持件1进行限位，确保电热元件2保持在收容腔31合适位置。
基体3包括开口端32和封闭端33，保持件1和电热元件2从开口端32置入收容腔31内，电热元件2的螺旋段21位于基体3和保持件1之间，电热元件2的电极连接端从开口端32延出到基体3外。具体地，发热体10还包括第一引脚线23和第二引脚线24；第一引脚线23的一端与螺旋段21连接，第二引脚线24的一端与延伸段22连接，第一引脚线23的另一端和第二引脚线24的另一端均从开口端32延伸到基体3外。引脚线与电热元件2的连接可采用氩弧焊或激光焊的方式进行固定连接。
在本实施例中，第一引脚线23的一端与螺旋段21的连接点为第一 连接点(附图未示出)，第二引脚线24的一端与延伸段22的连接点为第二连接点(附图未示出)，所述第一连接点和所述第二连接点均位于收容腔31内。具体地，所述第一连接点与开口端32之间的距离为第一距离，所述第二连接点与开口端32之间的距离为第二距离，所述第一距离和所述第二距离之间的较小距离介于1mm和3mm之间。这样的设置，当基体3插入到烟支中，烟支底部1mm-3mm的高度没有进行加热，在烟支抽吸使用过程中，底部烟丝保持了较完整的形态，便于烟支提取过程中，防止烟丝烟渣掉入加热腔室20内，使得加热腔室20保持较清洁的状态。
在本实施例中，第一引脚线23和第二引脚线24可选用电阻率较低的材料，例如：镍丝。镍丝具有较好的耐腐蚀和耐氧化性能。
需要说明的是，在本实施例中，螺旋段21与延伸段22之间、螺旋段21与第二引脚线24之间、延伸段22与第一引脚线23之间、第一引脚线23与第二引脚线24之间均通过保持件1隔离，以防止接受电源之后短路。
在本实施例中，封闭端33凸设有突出部331，突出部331呈锥形，突出部331由基体3自封闭端33延伸而成。设置突出部331，可以便于基体3插入烟支中，并且增大基体3与烟支的接触面积。优选的，突出部331内部中空且与收容腔31连通，这样电热元件2产生的热量更好通过突出部331传导到烟支上，避免烟支在突出部331处受热不均而影响烟支的烘烤。
进一步地，电热元件2和保持件1插入基体3的收容腔31内后，可以利用密封件4将开口端32密封，使得电热元件2和保持件1稳定的置于基体3内，减少发热体内部的热量流失。密封件4可选用氧化镁、氧化硅、氧化铝等材料进行密封和绝缘。
在本实施例中，发热体10还包括底座5，基体3的开口端32的端面抵接在底座5上，第一引脚线23和第二引脚线24贯穿密封件4以及底座5。底座5可以采用热导率低的陶瓷材料，例如氧化锆，防止热量传导，降低气溶胶生成装置的外壳温度。
具体的，底座5呈柱形，可以为圆柱形、四棱柱形、六棱柱形等等。底座5上凹设有容槽51，基体3的开口端32固定于容槽51内，容槽51的槽底上设有供第一引脚线23和第二引脚线24穿过的贯穿孔511。进一步地，可将保持件1抵接于容槽51的底部，以将保持件1限制在基体3内的中心位置，使电热元件2在基体3内均匀分布，有利于对烟丝进行均匀加热。如图6所示，贯穿孔511可以为一个圆孔，且该圆孔 的直径小于保持件1的直径，以保证保持件1与容槽51底部抵接时不会滑入贯穿孔511中。如图7所示，贯穿孔511也可以为两个直径略大于电热元件2直径的圆孔，第一引脚线23和第二引脚线24分别从两个圆孔穿过，以便于与外部电源连接。
红外辐射体6用于接收电热元件2产生的热量加热升温产生红外线，并至少以辐射方式加热气溶胶形成基质。由于红外辐射具有一定的穿透性，对烟支的加热效果好，烟支中的成分能够得到释放地充分，提升了用户的抽吸体验。
请再参考图3所示，在本实施例中，红外辐射体6为填充在所述收容腔内的红外辐射粉末材料。红外辐射体6可以选用氧化物、碳材料、碳化物、氮化物等具有较高红外辐射率的材料制成。具体地如下所示：
金属氧化物及多组分合金氧化物，包括：三氧化二铁、三氧化二铝、三氧化二铬、三氧化二铟、三氧化二镧、三氧化二钴、三氧化二镍、三氧化二锑、五氧化二锑、二氧化钛、二氧化锆、二氧化锰、二氧化铈、氧化铜、氧化锌、氧化镁、氧化钙、三氧化钼等；也可以是以上两种或两种以上金属氧化物的组合；还可以是具有尖晶石、钙钛矿、橄榄石等晶胞结构的陶瓷材料。
碳材料的发射率接近于黑体特性，具有较高的红外辐射率。碳材料，包括：石墨、碳纤维、碳纳米管、石墨烯、类金刚石薄膜等。
碳化物，包括：碳化硅，碳化硅在较大的红外线波长范围内(2.3微米-25微米)具有高发射率，是较好的近全波段红外辐射材料；此外，还有碳化钨、碳化铁、碳化钒、碳化钛、碳化锆、碳化锰、碳化铬、碳化铌等，都具有较高的红外发射率(MeC相不具备严格的化学计算成分和化学式)。
氮化物，包括：金属氮化物和非金属氮化物，其中金属氮化物包括：氮化钛、碳氮化钛、氮化铝、氮化镁、氮化钽、氮化钒等；非金属氮化物包括：氮化硼、五氮化三磷、氮化硅(Si3N4)等。
其他无机非金属材料，包括：二氧化硅、硅酸盐(包括磷硅酸盐、硼硅酸盐等)、钛酸盐、铝酸盐、磷酸盐、硼化物、硫系化合物等。
在其他示例中，红外辐射体6可以为形成在基体3的外表面上的红外辐射膜层，可以通过物理气相沉积方式形成在基体3的外表面上。此时，基体3可以选用金属、合金等材料。
进一步地，还可以在基体3的外表面设有釉层，釉层可以对红外辐射膜层进行保护，防止红外辐射膜层被刮擦。
参照图8所示，本申请实施例还提供一种气溶胶生成装置，气溶胶 生成装置包括加热腔室20和设置于加热腔室20内的发热体10。气溶胶生成装置还包括电池30，发热体10与电池30电连接，电池30向电热元件2提供电功率以产生热量。电池30可以是但不限于磷酸铁锂(LiFePO4)电池。例如，电池30可以是钴酸锂(LiCoO2)电池或钛酸锂电池；电池30可以是可反复充电电池或一次性电池。
本申请实施例的发热体10以及包含该发热体10的气溶胶生成装置，通过红外辐射体接收电热元件产生的热量加热升温产生红外线，并至少以辐射方式加热气溶胶形成基质；由于红外辐射具有一定的穿透性，对烟支的加热效果好，烟支中的成分能够得到释放地充分，提升了用户的抽吸体验。
需要说明的是，本申请的说明书及其附图中给出了本申请的较佳的实施例，但是，本申请可以通过许多不同的形式来实现，并不限于本说明书所描述的实施例，这些实施例不作为对本申请内容的额外限制，提供这些实施例的目的是使对本申请的公开内容的理解更加透彻全面。并且，上述各技术特征继续相互组合，形成未在上面列举的各种实施例，均视为本申请说明书记载的范围；进一步地，对本领域普通技术人员来说，可以根据上述说明加以改进或变换，而所有这些改进和变换都应属于本申请所附权利要求的保护范围。

Claims (15)

  1. 一种发热体，用于对气溶胶形成基质进行加热以生成气溶胶，其特征在于，包括：
    电热元件，用于接受电源的电功率产生热量；
    基体，用于插入所述气溶胶形成基质中；所述基体的内部形成有收容腔，所述收容腔用于收容所述电热元件；
    红外辐射体，与所述电热元件导热地设置在所述基体上；所述红外辐射体用于接收所述电热元件产生的热量加热升温产生红外线，并至少以辐射方式加热所述气溶胶形成基质。
  2. 根据权利要求1所述的发热体，其特征在于，所述红外辐射体为形成在所述基体外表面上的红外辐射膜层；和/或，所述红外辐射体为填充在所述收容腔内的红外辐射粉末材料。
  3. 根据权利要求1或2所述的发热体，其特征在于，所述收容腔的形状与所述基体的形状相匹配。
  4. 根据权利要求3所述的发热体，其特征在于，所述基体包括封闭端和开口端，所述电热元件从所述开口端收容于所述收容腔内。
  5. 根据权利要求4所述的发热体，其特征在于，所述发热体还包括第一引脚线和第二引脚线；
    所述第一引脚线的一端与所述电热元件的一端连接，所述第二引脚线的一端与所述电热元件的另一端连接，所述第一引脚线的另一端和所述第二引脚线的另一端均从所述开口端延出到所述基体外。
  6. 根据权利要求5所述的发热体，其特征在于，所述第一引脚线的一端与所述电热元件的一端的连接点为第一连接点，所述第二引脚线的一端与所述电热元件的另一端的连接点为第二连接点，所述第一连接点和所述第二连接点均位于所述收容腔内。
  7. 根据权利要求6所述的发热体，其特征在于，所述第一连接点与所述开口端之间的距离为第一距离，所述第二连接点与所述开口端之间的距离为第二距离，所述第一距离和所述第二距离之间的较小距离介于1mm和3mm之间。
  8. 根据权利要求7所述的发热体，其特征在于，所述发热体还包括密封件，所述密封件用于对所述开口端进行密封。
  9. 根据权利要求8所述的发热体，其特征在于，所述发热体还包括底座，所述开口端的端面抵接在所述底座上。
  10. 根据权利要求4所述的发热体，其特征在于，所述封闭端设有突出部，所述突出部呈锥形，所述突出部由所述基体自所述封闭端延伸而成。
  11. 根据权利要求1-10任一所述的发热体，其特征在于，所述发热体还包括保持件，用于使所述电热元件保持固定，所述保持件收容在所述基体的收容腔内。
  12. 根据权利要求11所述的发热体，其特征在于，所述保持件内部中空且两端均为开口以形成内孔，所述电热元件至少包括设置于所述保持件外表面上的螺旋段和位于所述内孔中的延伸段。
  13. 根据权利要求1-10任一所述的发热体，其特征在于，所述红外辐射体的材料选自氧化物、碳材料、碳化物、氮化物中的至少一种。
  14. 根据权利要求1-10任一所述的发热体，其特征在于，所述基体的材料选自金属、合金、石英玻璃、蓝宝石、碳化硅、氟化镁陶瓷、氧化钇陶瓷、镁铝尖晶石陶瓷、钇铝石榴石单晶、锗单晶中的至少一种。
  15. 一种气溶胶生成装置，其特征在于，包括加热腔室以及设置于该加热腔室内的如权利要求1-14任一所述的发热体。
PCT/CN2021/091946 2020-05-06 2021-05-06 发热体以及包含该发热体的气溶胶生成装置 WO2021223716A1 (zh)

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