WO2025246743A1 - 加热组件及气溶胶生成装置 - Google Patents

加热组件及气溶胶生成装置

Info

Publication number
WO2025246743A1
WO2025246743A1 PCT/CN2025/090829 CN2025090829W WO2025246743A1 WO 2025246743 A1 WO2025246743 A1 WO 2025246743A1 CN 2025090829 W CN2025090829 W CN 2025090829W WO 2025246743 A1 WO2025246743 A1 WO 2025246743A1
Authority
WO
WIPO (PCT)
Prior art keywords
microwave antenna
heating
heating assembly
aerosol
slot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2025/090829
Other languages
English (en)
French (fr)
Inventor
唐辉荣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen FirstUnion Technology Co Ltd
Original Assignee
Shenzhen FirstUnion Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202410777760.7A external-priority patent/CN121128982A/zh
Application filed by Shenzhen FirstUnion Technology Co Ltd filed Critical Shenzhen FirstUnion Technology Co Ltd
Publication of WO2025246743A1 publication Critical patent/WO2025246743A1/zh
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F47/00—Smokers' requisites not otherwise provided for

Definitions

  • This application relates to the field of aerosol generation technology, and more particularly to a heating component and an aerosol generating device.
  • a tobacco heating device is essentially an aerosol generating device. This device generates heat through a heater and heats the tobacco material via heat transfer or heat exchange.
  • existing technology provides an aerosol generating device using microwave heating.
  • the tobacco used in the aerosol generating device contains a microwave absorber (or microwave absorber).
  • the microwave absorber can rapidly heat up by absorbing microwave energy.
  • the increased temperature of the microwave absorber is conducted to the tobacco, heating it and generating aerosols.
  • the aerosol generating device is equipped with a resonant cavity.
  • the microwave transmission signal is fed into the resonant cavity through a dielectric antenna, and resonance is generated by reflection back and forth on the inner wall of the cavity, baking and heating the tobacco matrix material to produce aerosols.
  • Dielectric materials are provided on the inner and outer walls of the resonant cavity for efficient absorption of microwave resonant energy.
  • the aforementioned aerosol generating device also has the following drawbacks:
  • microwave absorbers or microwave absorbers added to the tobacco materials of aerosol-generated products have poor market applicability, which increases the cost of using the products.
  • resonant heating within a closed metal cavity yields the highest efficiency.
  • the heating cavity of the aforementioned aerosol generation device requires an opening for insertion of the aerosol-generated product. This prevents the resonant cavity from being completely sealed during use, resulting in a significant reduction in microwave heating efficiency.
  • aerosol generation devices with resonant cavities suffer from poor manufacturing consistency, exhibiting issues such as high microwave reflection power. The return loss of the radio frequency signal through the dielectric antenna is difficult to optimize, leading to high power consumption and reduced battery life during operation.
  • This application provides a heating component and an aerosol generating device, aiming to solve the technical problem that the existing heating components using resonant cavity heating methods easily lead to reduced heating efficiency and increased power consumption in the aerosol generating device.
  • inventions of this application provide a heating assembly.
  • the heating assembly is used to heat an aerosol-generating article to generate an aerosol, and the heating assembly includes: a support tube defining a heating chamber for accommodating at least a portion of the aerosol-generating article;
  • a microwave antenna is disposed on the inner surface of the support tube, the microwave antenna at least partially surrounds the heating cavity or defines at least a portion of the boundary of the heating cavity, and the microwave antenna is used to transmit radio frequency energy into the heating cavity, thereby radiating heat to at least a portion of the aerosol-generated article located in the heating cavity.
  • the microwave antenna is formed by winding a planar microwave antenna.
  • the support tube includes a first support portion and a second support portion connected to each other.
  • the first support portion is located at one end into which the aerosol generating article is inserted.
  • the inner diameter of the first support portion is smaller than the inner diameter of the second support portion.
  • a step is formed at the connection between the first support portion and the second support portion, and the microwave antenna abuts against the step.
  • a metal layer is disposed between the support tube and the microwave antenna.
  • the support tube is a ceramic tube, a quartz glass tube, or a polyetheretherketone tube.
  • the microwave antenna is a nickel silver sheet.
  • the microwave antenna is sheet-shaped and has a thickness of 0.2 mm to 0.7 mm.
  • the microwave antenna has a first through slot and a second through slot that extend circumferentially and are parallel to each other, and a portion of the support tube is exposed in the first through slot and the second through slot.
  • the width of the first through slot is greater than the width of the second through slot.
  • the microwave antenna has a feed terminal for connecting to the output terminal of radio frequency energy and a ground terminal for connecting to the antenna reference ground, the feed terminal and the ground terminal being located on both sides of the opening of the first through slot or the second through slot, respectively.
  • the support tube includes a first through hole and a second through hole, with the power supply end exposed in the first through hole and the grounding end exposed in the second through hole.
  • the microwave antenna is Z-shaped or F-shaped.
  • the support tube further includes a third through-hole
  • the microwave antenna includes pads for connecting a temperature sensor, the pads being exposed in the third through-hole.
  • the microwave antenna has opposing first and second sides along the circumferential direction, the first and second sides not overlapping to form a gap.
  • the microwave antenna is provided with a first through slot extending from the first side toward the second side, and the first through slot is spaced apart from the second side.
  • the microwave antenna is further provided with a second through slot extending from the second side toward the first side, the second through slot being spaced apart from the first side, and the second through slot being offset from the first through slot in the longitudinal direction.
  • the distance between the first through groove and the second side is greater than the distance between the second through groove and the first side.
  • the microwave antenna includes a ground terminal and a feed terminal, both of which are located on the first side, or both of which are located on the second side.
  • the height of the microwave antenna along the longitudinal direction of the support tube is 15mm-19mm, or the width of the microwave antenna after being unfolded circumferentially is 17mm-23mm.
  • the aerosol generating apparatus includes a circuit board assembly and the aforementioned heating assembly, wherein the circuit board assembly is used to provide electrical energy to the heating assembly.
  • this application discloses a heating assembly and an aerosol generation device.
  • This heating assembly employs a design where a microwave antenna is fixed inside a support tube and surrounds a heating cavity.
  • the heating cavity houses and heats the aerosol-generated product, allowing the microwave antenna to directly radiate heat onto the product.
  • the microwave radio frequency energy after being transmitted through a connector, is radiated in the near field by the microwave antenna.
  • the microwave antenna is a planar antenna coiled around the heating cavity, primarily feeding radio frequency energy radially towards the interior of the heating cavity, thus reducing the impact of the end openings of the heating cavity on microwave heating efficiency.
  • the structural positioning of the support tube sleeved on the microwave antenna ensures the certainty of their relative positions, facilitating the adjustment of the area with the highest radiated energy from the microwave antenna. This helps the heating assembly heat the middle part of the aerosol-generated product, thereby improving the heating effect and enhancing the long-term stability and reliability of the microwave heating cavity.
  • the integration of the support tube and microwave antenna into a single structure simplifies the structural complexity of the heating assembly, contributing to its miniaturization.
  • This aerosol generation device supplies power to the heating component via a circuit board assembly, which in turn feeds microwaves into the heating cavity through a microwave antenna. This allows the heating cavity to successfully heat the aerosol-generating product using microwaves, achieving the design objective of heating the aerosol-generating product to produce aerosols.
  • the device features a simple and reliable structure, small footprint, high operational stability, and long service life.
  • Figure 1 is a schematic diagram of the heating assembly provided in an embodiment of the present invention.
  • Figure 2 is a schematic diagram of the heating assembly provided in an embodiment of the present invention.
  • Figure 3 is a cross-sectional view of the heating assembly provided in an embodiment of the present invention.
  • Figure 4 is an unfolded view of the microwave antenna provided in an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of the heating module and aerosol-generated product provided in an embodiment of the present invention.
  • Figure 6 is an exploded view of the heating module provided in an embodiment of the present invention.
  • Figure 7 is a schematic diagram of the aerosol generating apparatus and aerosol generating product provided in an embodiment of the present invention.
  • Figure 8 is a cross-sectional view of the aerosol generating apparatus and the aerosol generating product provided in the embodiment of the present invention.
  • Figure 9 is an exploded view of the aerosol generating apparatus and the aerosol generating product provided in the embodiment of the present invention.
  • FIG. 10 is a schematic diagram of signal transmission of the microwave generator circuit according to an embodiment of the present invention.
  • FIG 11 is one of the signal transmission schematic diagrams of the microwave generator circuit in Figure 10;
  • Figure 12 is the second schematic diagram of signal transmission of the microwave generator circuit in Figure 10;
  • Figure 13 is a simulation diagram of the electric field of the microwave antenna according to an embodiment of the present invention.
  • Figure 14 is a magnetic field simulation diagram of the microwave antenna according to an embodiment of the present invention.
  • first position and second position refer to two different positions. Furthermore, “above,” “on top of,” and “over” the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. “Below,” “under,” and “below” the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
  • connection should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components.
  • connection should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components.
  • aerosol generating article 900 refers to an article comprising an aerosol-forming matrix intended to be heated rather than burned to release volatile compounds that can form aerosols. Aerosols formed by heating the aerosol-forming matrix may contain fewer known hazardous components than aerosols generated by combustion or pyrolytic degradation of the aerosol-forming matrix. In one embodiment, the aerosol generating article 900 is removably connected to the aerosol generating apparatus 400.
  • the aerosol-forming matrix is preferably a tobacco-containing material from which volatile compounds are released upon heating; alternatively, it can be a non-tobacco material suitable for electrically heated smoking.
  • the aerosol-forming matrix is preferably a solid matrix, which may include one or more of the following: vanilla leaves, tobacco leaves, homogenized tobacco, expanded tobacco, in powder, granules, fragments, strips, or flakes; or, the solid matrix may contain additional tobacco or non-tobacco volatile flavor compounds to be released upon heating.
  • a suitable aerosol-forming matrix may be a cigarette internally filled with tobacco material.
  • the term "aerosol generating article 900" refers to a container or box capable of containing an aerosol forming matrix, or other carrier capable of holding the aerosol forming matrix.
  • the aerosol forming matrix contained in the aerosol generating article 900 may be a liquid component or a combination of liquid and solid components.
  • Suitable aerosol forming matrices include, for example, polyols such as triethylene glycol, 1,3-butanediol, and glycerol; esters of polyols such as mono, di, or triacetic acid esters of glycerol; and fatty acid esters of mono, di, or polycarboxylic acids, such as dimethyl dodecanoate and dimethyl tetradecanoate.
  • Preferred aerosol forming matrices are polyhydroxy alcohols or mixtures thereof, such as triethylene glycol, 1,3-butanediol, and most preferably glycerol.
  • the aerosol forming matrix may include other additives and ingredients, such as fragrances.
  • the aerosol generating article 900 also includes a liquid holding element for adsorbing and retaining the liquid matrix.
  • Suitable liquid holding elements are made of flexible fibers such as cotton fibers, non-woven fabrics, sponges, etc.
  • the liquid holding element is made of porous materials such as microporous ceramics, microporous glass, or microporous metals.
  • aerosol generating apparatus 400 is an apparatus that is engaged with or interacts with aerosol generating article 900 to form an inhalable aerosol.
  • the aerosol generating apparatus 400 includes a heating component 110, which is used to heat the aerosol forming matrix of the aerosol generating article 900 to generate aerosol.
  • one embodiment of this application provides a heating assembly 110 for heating an aerosol generating article 900 to generate an aerosol, including a support tube 112 and a microwave antenna 111; the support tube 112 defines a heating cavity 1121 for accommodating at least a portion of the aerosol generating article 900; the microwave antenna 111 is disposed on the inner surface of the support tube 112, the microwave antenna 111 at least partially surrounds the heating cavity 1121 or defines at least a portion of the boundary of the heating cavity 1121, and the microwave antenna 111 is used to emit radio frequency energy into the heating cavity 1121, thereby radiating heat to at least a portion of the aerosol generating article 900 located in the heating cavity 1121.
  • different matrix materials within the aerosol-forming product 900 can absorb microwave radio frequency energy to varying degrees.
  • the matrix materials couple with the microwave electromagnetic field, thereby achieving energy conversion.
  • the microwave electromagnetic field energy conversion process includes, but is not limited to, ion conduction, dipole rotation, and interface polarization.
  • the aerosol-forming matrix absorbs microwave electromagnetic field energy and converts it into heat through ion conduction and dipole rotation, causing its overall temperature to rise and generate aerosols.
  • the heating method of this application does not rely on heat transfer and convection radiation, reducing the temperature gradient within the aerosol-forming matrix during the heating process. It has the advantages of fast heating speed and high temperature uniformity.
  • the heating assembly 110 employs a design that fixes the microwave antenna 111 inside the support tube 112.
  • the heating cavity 1121 houses and heats the aerosol-generated product 900, allowing the microwave antenna 111 to directly contact and radiate heat the aerosol-generated product 900.
  • Microwave energy after being transferred through the connector, is radiated in the near field through the microwave antenna 111. Because the matrix material of the aerosol-generated product 900 is in contact with or close to the microwave antenna, there is little or no absorption or attenuation of radio frequency energy by intermediate dielectric materials during the heating process; this significantly improves microwave heating efficiency and reduces power dissipation during the heat preservation stage.
  • the microwave antenna 111 preferably employs a planar antenna coiled around the heating cavity, primarily feeding radio frequency energy radially towards the interior of the heating cavity 1121, thus reducing the impact of the end openings of the heating cavity on microwave heating efficiency. Meanwhile, the structural positioning of the support tube 112 sleeved on the microwave antenna 111 ensures the determination of their relative positions, facilitating the adjustment of the position of the area with the highest radiated energy of the microwave antenna 111. This helps the heating assembly 110 heat the middle part of the aerosol-generated product 900, thereby improving the heating effect and enhancing the long-term stability and reliability of the microwave heating cavity 1121.
  • the support tube 112 includes a first support portion 1122 and a second support portion 1123 connected to each other.
  • the first support portion 1122 is located on the side where the aerosol generating article 900 is inserted.
  • the inner diameter of the first support portion 1122 is smaller than the inner diameter of the second support portion 1123.
  • a step 1124 is formed at the connection between the first support portion 1122 and the second support portion 1123. The microwave antenna 111 abuts against the step 1124.
  • the heating chamber 1121 has a first opening and a second opening.
  • the first opening is located in the first support portion 1122
  • the second opening is located in the second support portion 1123.
  • the end of the microwave antenna 111 near the first opening is attached to the step 1124 (i.e., the stepped surface of the inner wall of the support tube 112).
  • the inner diameter of the microwave antenna 111 is greater than or equal to the inner diameter of the support tube 112 at the first opening.
  • the microwave antenna 111 after the microwave antenna 111 is installed in the second support portion 1123, its inner surface smoothly transitions with the inner surface of the first support portion 1122, ensuring smooth insertion of the aerosol-generated product.
  • the installation difficulty of the microwave antenna 111 within the support tube 112 is reduced, ensuring that the support tube 112 can be stably installed and guaranteeing the heating effect of the heating component 110 on the aerosol generating product 900. Furthermore, by limiting the inner diameter, the possibility of the microwave antenna 111 obstructing the aerosol generating product 900 can be avoided, reducing the risk of damage to the microwave antenna 111 and lowering the difficulty for smokers to insert the aerosol generating product 900, thus improving the user experience for smokers.
  • the step 1124 is annular, and the microwave antenna 111 surrounds the inner surface of the support tube 112. That is, the inscribed circles of the cross-sections of the first support portion 1122 and the second support portion 1123 are concentric.
  • the above limitation further reduces the assembly difficulty of the microwave antenna 111 in the support tube 112, simplifies the specific structure inside the support tube 112, reduces the production cost of the support tube 112, and optimizes the specific structure of the heating component 110.
  • a step 1124 is machined into the inner wall of the support tube 112.
  • the inner diameter of the microwave antenna 111 needs to be selected after taking into account the thickness of the bulge after the microwave antenna 111 is brazed.
  • the support tube 112 and the microwave antenna 111 are fixed with a clamp.
  • the microwave antenna 111 is inserted into the support tube 112. After ensuring that the microwave antenna 111 is fixed in the ideal position and shape, a high-temperature brazing fixing operation is performed.
  • a protective layer such as a glaze layer, is provided on the side of the microwave antenna 111 facing away from the support tube 112.
  • the protective layer has a thickness of approximately 0.1 mm to 0.5 mm, which has minimal impact on the attenuation of the microwave radio frequency signal.
  • the protective layer with its smooth inner surface, ensures that the aerosol-generated article 900 can be smoothly inserted into or removed from the heating cavity 1121. It also prevents residues and liquids from the matrix material from corroding the microwave antenna 111 during long-term use, thus avoiding any impact on the performance of the microwave antenna 111.
  • the support tube 112 is made of ceramic, quartz glass, polyetheretherketone (PEEK), or other high-temperature resistant plastics.
  • a metal layer 1128 is provided between the support tube 112 and the microwave antenna 111.
  • the metal layer 1128 can improve the bonding force between the microwave antenna 111 and the support tube 112.
  • the metal layer 1128 can concentrate radiated energy into the heating cavity through emission or other means, improving heating efficiency.
  • the support tube 112 when the support tube 112 is made of ceramic, a metallization treatment is performed on the surface of the support tube 112 to obtain the metal layer 1128, which acts as a solder pad, facilitating the connection of the microwave antenna 111 to the support tube 112 by welding to the metal layer 1128, reducing the difficulty of subsequent welding operations.
  • the microwave antenna 111 when the support tube 112 is made of PEEK, the microwave antenna 111 is interference-fitted to the support tube 112, and the microwave antenna 111 can be interference-fitted to the PEEK during the assembly process.
  • the microwave antenna 111 can be integrated onto the inner surface of the support tube 112 by means including but not limited to electroplating, printing, spraying, vapor deposition, sintering, and in-mold injection molding to form an integral structure.
  • the microwave antenna 111 can be sintered together with the ceramic slurry, thereby placing the microwave antenna 111 inside the ceramic tube.
  • the support tube 112 is made of plastic
  • the plastic can be molded around the microwave antenna in a mold to form an integral structure.
  • the microwave antenna 111 is a nickel silver sheet. In another embodiment of this application, the microwave antenna 111 includes a flexible printed circuit board (FPC).
  • FPC flexible printed circuit board
  • the microwave antenna 111 is sheet-shaped, and its thickness is 0.2 mm to 0.7 mm.
  • the thickness of the microwave antenna 111 is 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, or 0.7 mm.
  • the microwave antenna 111 is a planar wire or strip wire with a certain width, compared with the traditional linear spiral antenna, the microwave antenna 111 in this application can provide a larger area of radiation projection within the heating cavity, which is beneficial to improving the microwave heating efficiency of the heating component 110.
  • the microwave antenna 111 is brazed to the metal layer 1128.
  • Ceramic tubes and polyetheretherketone (PEEK) tubes have low production costs, high operational stability, and long service life.
  • the thermal conductivity of PEEK and ceramics is relatively low compared to metal materials, effectively preventing heat leakage from the heating cavity 1121. This effectively improves the heat preservation capability of the heating assembly 110, contributing to increased microwave heating efficiency and reduced power dissipation during the heat preservation phase.
  • Brazing offers advantages such as high reliability, wide applicability, simple processing, and controllable quality, facilitating a long-term stable connection between the microwave antenna 111 and the support tube 112. Combined with the metal layer 1128, this ensures the effective connection between the microwave antenna 111 and the support tube 112, thereby guaranteeing the long-term stable operation of the heating assembly 110.
  • the microwave antenna 111 has a first through slot 1111 and a second through slot 1112 that extend circumferentially and are parallel to each other, with a portion of the support tube 112 exposed in the first through slot 1111 and the second through slot 1112.
  • the microwave antenna 111 is Z-shaped or F-shaped and is constructed as a ring around the inner surface of the support tube 112.
  • the microwave antenna 111 can be a planar inverted-F antenna (PIFA), which is advantageous for reducing the volume of the heating assembly 110.
  • PIFA planar inverted-F antenna
  • the microwave antenna 111 is Z-shaped.
  • the above design defines the specific structure of the microwave antenna 111, ensuring the stable operation of the microwave antenna 111, ensuring that the microwave antenna 111 can smoothly feed microwaves into the heating cavity 1121, and ensuring the heating effect of the heating assembly 110 on the aerosol generation article 900.
  • the microwave antenna 111 is flexible and rollable.
  • the microwave antenna 111 includes a flexible film and a conductor material supported on the flexible film.
  • the conductor material has certain corrosion resistance and good conductivity, including but not limited to metals such as aluminum, copper, and tungsten, as well as alloys.
  • a suitable microwave antenna 111 can be a flexible printed circuit board (FPC).
  • the microwave antenna 111 can be a nickel silver sheet. Both the FPC and the nickel silver sheet are flexible, thus the microwave antenna 111 can be bent, allowing it to wrap around and conform to the support tube 112.
  • the heating assembly 110 also includes a positioning component for holding the FPC or nickel silver sheet on the inner surface of the support tube 112 without displacement. Commonly used positioning components include heat shrink tubing and high-temperature resistant tape.
  • the microwave antenna 111 is mounted on the inner surface of the support tube 112.
  • the conductor material of the microwave antenna 111 is integrated onto the support tube 112.
  • the microwave antenna 111 includes a film structure of conductor material, the film structure having a specific pattern shape (see Figure 4), and the film structure can be bonded and integrated onto the inner surface of the support tube by means of methods not limited to printing, spraying, etching, or vapor deposition.
  • the width and height of the unfolded microwave antenna 111 are matched with the outer diameter and longitudinal length of the support tube 112.
  • the circumferential width of the microwave antenna 111 is smaller than the circumference of the support tube 112, thereby ensuring that the microwave antenna 111 can be precisely mounted on the surface of the support tube 112.
  • the two sides of the microwave antenna 111 along the width direction will not overlap when the microwave antenna 111 is arranged around the outer wall of the support tube 112, avoiding any overlap that could affect the radiation efficiency of the microwave antenna 111.
  • the microwave antenna 111 can substantially or partially cover the longitudinal length of the support tube 112. It can be understood that the height of the microwave antenna 111 is matched with the length of the aerosol generation matrix section within the aerosol generation product 900, thus enabling the antenna's radiation area to effectively cover the matrix material.
  • the height of the microwave antenna 111 along the longitudinal direction of the support tube 112 is 15mm-19mm, and the width of the microwave antenna 111 after being unfolded circumferentially is 17mm-23mm.
  • the spiral-shaped antenna has an appropriate inner diameter, so that the axial center of the aerosol generation matrix in the heating chamber can also have an electric field or magnetic field strength sufficient to volatilize one or more components in the matrix material during operation, which is beneficial to improving the heating uniformity of the aerosol generation matrix.
  • the microwave antenna 111 is provided with a feed terminal 1114 for connecting the output terminal of radio frequency energy and a ground terminal 1113 for connecting the antenna reference ground.
  • the feed terminal 1114 and the ground terminal 1113 are located on both sides of the opening of the first through slot 1111 or the second through slot 1112, respectively.
  • the microwave antenna 111 has opposing first side 1115 and second side 1116 along the circumferential direction, and the first side 1115 and second side 1116 do not overlap to form a gap. Because the two sides of the microwave antenna 111 along the length direction X overlap when the microwave antenna 111 surrounds the outer wall of the support tube 112, the overlapping portion will affect the return loss of the microwave antenna 111, resulting in a serious impact on the energy transmission efficiency of the radio frequency radiation. Therefore, as shown in Figures 1-2, the first side 1115 and second side 1116 of the microwave antenna 111 in this embodiment do not overlap and have a gap.
  • the support tube 112 further includes a rib 1129.
  • the rib 1129 is located between the first side 1115 and the second side 1116.
  • the design of the rib 1129 can play a positioning role when the microwave antenna 111 is installed on the support tube 112, so that after the microwave antenna 111 is installed on the support tube 112, the feed end 1114 is exposed to the first through hole 1125 and the ground end 1113 is exposed to the second through hole 1126.
  • the microwave antenna 111 includes a first portion 11171, a second portion 11172, and a third portion 11173 separated by a first through slot 1111 and a second through slot 1112.
  • the dimensions of the first portion 11171, the second portion 11172, and the third portion 11173 in the direction perpendicular to the first through slot 1111 and the second through slot 1112 are L1, L2, and L3, respectively, where L3 > L1 > L2.
  • the microwave antenna 111 is provided with a first through slot 1111 extending from a first side 1115 toward a second side 1116, and the first through slot 1111 and the second side 1116 are spaced apart by a distance L4.
  • the microwave antenna 111 is further provided with a second through slot 1112 extending from the second side 1116 toward the first side 1115, the second through slot 1112 and the first side 1115 are spaced apart by a distance L5, and the second through slot 1112 and the first through slot 1111 are longitudinally offset.
  • the distance L4 between the first through slot 1111 and the second side 1116 is greater than the distance L5 between the second through slot 1112 and the first side 1115.
  • the microwave antenna 111 is provided with a first through slot 1111 and a second through slot 1112 extending parallel to each other along the circumferential direction or the unfolded width direction, and a portion of the support tube 112 is exposed in the first through slot 1111 and the second through slot 1112.
  • the width L6 of the first through slot 1111 is greater than the width L7 of the second through slot 1112.
  • the microwave antenna 111 is Z-shaped. That is, the first through slot 1111 and the second through slot 1112 extend from the left and right edges of the microwave antenna 111 towards the center, respectively, and the first through slot 1111 and the second through slot 1112 are located in the middle of the microwave antenna 111 along the height direction Y.
  • the microwave antenna 111 may be F-shaped.
  • the microwave antenna 111 includes a grounding terminal 1113 and a feeding terminal 1114, which are located on opposite sides of the opening of the first through slot 1111.
  • the electromagnetic wave radiation of the microwave antenna 111 is strongest near the first through slot 1111.
  • the electric field distribution diagram of the heating component when energized shown in FIG13 and the magnetic field distribution diagram shown in FIG14 when the grounding terminal 1113 and the feeding terminal 1114 are located on opposite sides of the opening of the first through slot 1111, the electric field strength and magnetic field strength of the microwave antenna 111 near the first through slot 1111 are the highest.
  • the first through slot 1111 is opened approximately at the middle position of the longitudinal height of the microwave antenna 111 (see FIG4).
  • the first through slot 1111 can be designed to be positioned at a specific location in the longitudinal direction of the heating chamber. This allows the aerosol generation device to be used such that when the aerosol generation product 900 is inserted into the heating chamber, the first through slot 1111 can be aligned longitudinally with the center of the aerosol generation matrix, thereby maximizing the absorption of radio frequency energy and improving the heating rate of the aerosol generation matrix.
  • the grounding terminal 1113 and the power supply terminal 1114 are located on either side of the opening of the second through slot 1112.
  • the microwave antenna 111 includes a grounding terminal 1113 and a feeding terminal 1114. Both the grounding terminal 1113 and the feeding terminal 1114 are located on a first side 1115, or both are located on a second side 1116, meaning both are located on the same side of the microwave antenna 111.
  • the aerosol generating article 900 includes a filter section and a smoke-generating section connected to each other. The filter section is for the user to hold in their mouth, and the smoke-generating section includes a smoke-generating substance. After being heated by the heating component 110, the smoke-generating section can generate an aerosol for the user to inhale.
  • the microwave energy is highest at the first through slot 1111 or the second through slot 1112, which is provided with a power supply terminal 1114 and a grounding terminal 1113.
  • the middle part of the smoke-generating section of the aerosol generating product 900 corresponds to the position of the first through slot 1111 or the second through slot 1112, which is provided with a power supply terminal 1114 and a grounding terminal 1113. This results in the middle part of the smoke-generating section of the aerosol generating product 900 absorbing the most microwave energy, which is beneficial for the rapid generation of aerosol in the smoke-generating section.
  • the support tube 112 includes a first through hole 1125 and a second through hole 1126 extending through the inner and outer sides.
  • the feed end 1114 is exposed through the first through hole 1125, and the ground end 1113 is exposed through the second through hole 1126, which facilitates the soldering of the microwave antenna's RF cable to the feed end 1114 and the ground end 1113.
  • the support tube 112 also includes a third through hole 1127.
  • the microwave antenna 111 includes a pad 1118 for connecting a temperature sensor.
  • the pad 1118 is exposed through the third through hole 1127.
  • the temperature sensor is connected to the pad 1118 through the third through hole 1127, so that the temperature sensor can sense the temperature of the heating component 110.
  • the integration difficulty of the pads on the heating component 110 is reduced, thereby simplifying the specific structure of the heating component 110, improving the structural stability of the heating component 110, reducing the difficulty of the pads accidentally detaching from the heating component 110, extending the service life of the heating component 110, ensuring the long-term stable operation of the heating component 110, and ensuring the smooth connection between the other components and the heating component 110.
  • the three cables are soldered to the power supply terminal 1114, the grounding terminal 1113, and the pad 1118 respectively.
  • the antenna reference ground and the output terminal of radio frequency energy are conventional settings in the art. Their purpose and specific connection method are common knowledge in the art and are well known to those skilled in the art. They will not be described in detail here.
  • this embodiment also provides an aerosol generating device 400, including a circuit board assembly 200 and the heating assembly 110 described above.
  • the circuit board assembly 200 is used to provide electrical energy to the heating assembly 110.
  • the aerosol generating device 400 supplies power to the heating component 110 via the circuit board assembly 200, which in turn feeds microwaves into the heating cavity 1121 through the microwave antenna 111. This allows the heating cavity 1121 to successfully microwave heat the aerosol generating product 900, achieving the design objective of heating the aerosol generating product 900 to generate aerosols.
  • the aerosol generating device 400 has a simple and reliable structure, occupies little space, exhibits high operational stability, and has a long service life.
  • the heating component 110 is mounted on the module housing 120, which is composed of multiple components and is used to protect the heating component 110. Both the heating component 110 and the module housing 120 belong to the heating module 100.
  • the aerosol generating device 400 also includes a device housing 300, within which the heating module 100 and circuit board assembly 200 are installed.
  • the device housing 300 is composed of multiple components and is used to protect the heating module 100 and circuit board assembly 200.
  • the aerosol generating device 400 may be a heated non-combustible aerosol generating device 400 and may be handheld, which can be used to heat an aerosol generating article 900 containing solid tobacco, such as a cigarette.
  • the aerosol generating device 400 employs microwave heating.
  • the aerosol generating device 400 includes a microwave antenna 111 surrounding the outer wall of the support tube 112.
  • the microwave antenna 111 is electrically connected to the circuit board assembly 200, which integrates a microwave generating circuit and a controller.
  • the controller is connected to the microwave generating circuit.
  • the microwave generating circuit includes: an integrated chip, a circulator, a microstrip, a PI-type attenuator, a power detector, and a load.
  • the circulator is installed outside the heating cavity 1121.
  • the output terminal of the integrated chip is connected to the first terminal of the circulator, and the second terminal of the circulator is connected to the microwave antenna 111.
  • the microwaves output by the integrated chip are fed into the microwave antenna 111 through the first and second terminals of the circulator.
  • the aerosol generating matrix in the heating cavity 1121 is heated under the action of microwaves and releases aerosols.
  • the second terminal of the circulator can also receive the microwave signal fed back from the microwave antenna 111 and transmit the fed-back microwave signal to the third terminal of the circulator through the second terminal.
  • the integrated chip outputs a radio frequency signal with a conduction frequency of f and a power of Pout to the first terminal of the circulator.
  • the second terminal of the circulator outputs a radio frequency signal to the microwave antenna 111. Since the frequency of the microwave antenna 111 will be offset, the microwave antenna 111 operates within the offset bandwidth. The return loss of the microwave antenna 111 is different at different frequencies. Therefore, some radio frequency signals will be reflected to the third terminal of the circulator and absorbed by the high-power load.
  • the integrated chip is an oscillator power amplifier chip using a single integrated oscillator circuit and a 20-40W (watt) unipolar gallium nitride (GaN) RF power amplifier on a single substrate.
  • the microstrip matching of the external gate, drain, and feedback network of this integrated chip occupies very little space, which is beneficial for the miniaturization and integration of the aerosol generation device 400 product.
  • the power of the unipolar GaN RF power amplifier can also be selected as 20-25W, 25-30W, 30-35W, or 35-40W.
  • the oscillation circuit of the integrated chip integrates a voltage-controlled oscillator (VCO) and an attenuator (ATT), which can adjust the output power.
  • VCO voltage-controlled oscillator
  • ATT attenuator
  • the output power sequentially passes through an integrated first-stage power amplifier, a driver-stage power amplifier, and a final-stage power amplifier; or as shown in Figure 12, the output power sequentially passes through an integrated first-stage power amplifier, a driver-stage power amplifier, and a final-stage power amplifier.
  • a circulator is a device that transmits radio frequency conducted signals unidirectionally. In a circulator, the signal conduction direction is from the first terminal to the second terminal, and from the second terminal to the third terminal.
  • the high-power load is selected to operate at a high frequency.
  • the rated power of the high-power load is greater than the maximum reflected power of the microwave antenna 111.
  • the resistance of the high-power load is 50 ohms or greater.
  • the function of the high-power load is to absorb the energy reflected back from the microwave antenna 111.
  • the microstrip includes a forward output microstrip and a reflective microstrip.
  • the two ends of the forward output microstrip are connected to the output of the integrated chip and a PI-type attenuator (PI stands for the Greek letter ⁇ ), respectively.
  • the two ends of the reflective microstrip are connected to the load and a power detector, respectively.
  • the forward output microstrip and the reflective microstrip are coupled with a certain degree of coupling.
  • the power of the forward output end and the reflective end are coupled by the microstrip.
  • the sampling pin MCU_AD1 of the controller collects the voltage value V of the output end through the PI-type attenuator, and the sampling pin MCU_AD2 collects the voltage value V of the reflective end through the power detector.
  • the magnitude of the power of the forward output end and the power of the reflective end can be calculated.
  • the return loss of the microwave antenna 111 can be calculated by the ratio of the power of the forward output end and the power of the reflective end.
  • the microstrip includes a reflective microstrip with a load and a power detector connected to its two ends, respectively.
  • the power detector can also map the power value of the reflected microwave signal
  • the controller can also map the return loss value through the mapping relationship between the changing power value and the return loss.
  • the forward output microstrip and the reflective microstrip can be omitted.
  • the stability of the integrated chip is judged by the stable current fluctuation of the integrated chip. An increase in current indicates that the reflected signal of the microwave antenna is enhanced, resulting in a decrease in return loss. Conversely, a decrease in current indicates that the value of return loss is increased, thus improving the efficiency of microwave heating.
  • the integrated chip operates within a frequency range of 2430MHz-2460MHz.
  • Poutput and Preflection correspond to the RF power at the forward output terminal and the reflected power at the reflective terminal, respectively;
  • Vcoupling and Vreflection correspond to the voltage values at the forward output terminal and the reflective terminal, respectively;
  • VSWR is an abbreviation for Voltage Standing Wave Ratio.
  • the integrated chip outputs RF energy with a reference frequency of 2449MHz and a power of Pout.
  • This energy is input through the first terminal of the circulator, conducted through the second terminal, and output to the microwave antenna 111.
  • the third terminal receives the microwave energy reflected back from the microwave antenna 111 and transfers it to the load.
  • some of the heat from the heating component 110 is transferred to the microwave generating circuit.
  • the output frequency of the integrated chip increases or decreases, with a maximum of no more than 2460MHz and a minimum of no less than 2430MHz. Therefore, the optimal return loss of the microwave antenna 111 must cover these frequency ranges.
  • the power transmission efficiency of microwave antenna 111 when the return loss is greater than or equal to 10, the power transmission efficiency of microwave antenna 111 is greater than 90%; when the return loss is greater than or equal to 13.7, the power transmission efficiency of microwave antenna 111 is greater than 95.7%; when the return loss is greater than or equal to 18.2, the power transmission efficiency of microwave antenna 111 is greater than 98.5%.
  • the heating frequency of the microwave antenna 111 is 2430MHz-2460MHz.
  • the return loss of the microwave antenna 111 is greater than or equal to 10
  • the transmission efficiency of the microwave antenna 111 is greater than 90%
  • the heating effect on the aerosol-generated product 900 is better.
  • the existing integrated chip's output terminal lacks a circulator and is directly connected to the microwave antenna 111.
  • microwaves are reflected back to the integrated chip's output terminal, causing self-oscillation and damage to the integrated chip. Therefore, this embodiment adds a circulator to the integrated chip's output terminal, allowing the microwaves reflected back from the microwave antenna 111 to be absorbed by the load, thereby protecting the integrated chip.
  • the integrated chip selects the optimal operating frequency point from the top 5 frequency points with the best transmission efficiency as the actual microwave heating frequency point.
  • the controller increases or decreases the output frequency of the integrated chip according to a preset adjustment value, repeating the above steps until the output frequency of the integrated chip traverses 2430MHz-2460MHz, obtaining multiple return loss values for each output frequency.
  • the controller selects the output frequency corresponding to a return loss greater than 10 and records the output frequency with a return loss greater than 10 and its corresponding transmission efficiency in an array to form a mapping relationship.
  • the controller selects the top 5 output frequencies with the best transmission efficiency from the array and chooses the best output frequency from these 5 output frequencies as the actual output frequency of the integrated chip.
  • the top 5 output frequencies with the best transmission efficiency can be selected, and the best output frequency from these can be used as the actual output frequency of the integrated chip.
  • the preset adjustment value can be set by the controller as needed; in this embodiment, the preset adjustment value can be set to 2MHz.
  • the microwave generating circuit of the aerosol generating device 400 can output a microwave signal with a fixed frequency.
  • the optimal frequency point of the microwave antenna may shift during long-term use of the device. Therefore, the controller in the microwave generating circuit has a built-in program for selecting the optimal output frequency.
  • the integrated chip calls and runs this program to determine the optimal output frequency through the above method. Then, the optimal output frequency is used to feed radio frequency energy through the microwave antenna, thereby controlling the heating component 110 to start working.
  • the aerosol generating device 400 may only use the above method to determine the optimal output frequency during the pre-shipment debugging stage, and the determined optimal output frequency is used for heating during the actual use of the aerosol generating device 400.
  • the microwave generating circuit can output a microwave signal with a variable frequency.
  • the controller in the microwave generating circuit is configured to collect the feedback signal parameters of the microwave antenna in real time or in stages and calculate the return loss value, thereby adjusting the optimal output frequency to the microwave antenna according to the change in the return loss value.
  • this application discloses a heating assembly and an aerosol generation device.
  • This heating assembly employs a design where a microwave antenna is fixed inside a support tube and surrounds a heating cavity.
  • the heating cavity houses and heats the aerosol-generated product, allowing the microwave antenna to directly radiate heat onto the product.
  • the microwave radio frequency energy after being transmitted through a connector, is radiated in the near field by the microwave antenna.
  • the microwave antenna is a planar antenna coiled around the heating cavity, primarily feeding radio frequency energy radially towards the interior of the heating cavity, thus reducing the impact of the end openings of the heating cavity on microwave heating efficiency.
  • the structural positioning of the support tube sleeved on the microwave antenna ensures the certainty of their relative positions, facilitating the adjustment of the area with the highest radiated energy from the microwave antenna. This helps the heating assembly heat the middle part of the aerosol-generated product, thereby improving the heating effect and enhancing the long-term stability and reliability of the microwave heating cavity.
  • the integration of the support tube and microwave antenna into a single structure simplifies the structural complexity of the heating assembly, contributing to its miniaturization.
  • This aerosol generation device supplies power to the heating component via a circuit board assembly, which in turn feeds microwaves into the heating cavity through a microwave antenna. This allows the heating cavity to successfully heat the aerosol-generating product using microwaves, achieving the design objective of heating the aerosol-generating product to produce aerosols.
  • the device features a simple and reliable structure, small footprint, high operational stability, and long service life.

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Abstract

本申请涉及气溶胶产生技术领域，具体公开了一种加热组件及气溶胶生成装置。该组件用于加热气溶胶生成制品以产生气溶胶，该组件包括支撑管和微波天线；支撑管，限定有用于容纳气溶胶生成制品的至少一部分的加热腔；微波天线，设置于支撑管的内表面，微波天线至少部分环绕加热腔或者限定加热腔的至少部分边界，并且微波天线用于向加热腔内发射射频能量，从而对位于加热腔内的气溶胶生成制品的至少一部分进行辐射加热。该加热组件采用将微波天线固定于支撑管内部的设计，使微波天线得以对气溶胶生成制品进行直接接触加热和辐射加热，由此提升了微波加热的效率，减少了保温阶段功率的耗散。

Description

加热组件及气溶胶生成装置
相关申请的交叉引用
本申请要求2024年06月14日向中国国家知识产权局递交的申请号为202410777760.7，名称为“加热组件及气溶胶生成装置”的在先申请的优先权，上述在先申请的内容以引入的方式并入本文本中。
技术领域
本申请实施例涉及气溶胶产生技术领域，尤其涉及一种加热组件及气溶胶生成装置。
背景技术
传统卷烟的燃烧温度一般为900℃左右，燃烧过程中会产生含有有害化学成分的烟气，不仅影响吸烟者和周围人群的身体健康，还会造成环境的污染。为帮助想要戒烟的习惯性吸烟者戒掉比如香烟、雪茄、小雪茄和卷烟等传统的烟草产品，烟草加热装置逐渐受到人们的关注。烟草加热装置采用加热烟草而非燃烧烟草的手段，烘烤出烟草中的香味物质从而产生气溶胶。因此不会导致卷烟高温燃烧，避免了有害物质和侧流烟气的产生，是未来烟草行业的重要发展方向之一。
烟草加热装置实质上是一种气溶胶生成装置，该装置通过加热器产生热量并通过热传递或热交换的方式来加热烟草材料。为了改善热传递方式所带来的加热效率低以及加热不均匀等问题，现有技术中提供了一种采用微波加热方式的气溶胶生成装置，作为示例，气溶胶生成装置所用的烟草中混加有微波吸收剂(或吸波体)，微波吸收剂能够通过吸收微波能量的方式迅速升温，微波吸收剂的升温传导至烟草，使烟草受热并产生气溶胶。同时，气溶胶生成装置设置有谐振腔，微波传导信号通过介质天线馈入谐振腔内，通过在谐振腔的内壁来回反射的方式产生谐振，烘烤加热烟草基质材料从而产生气溶胶；谐振腔腔体的内壁面和外壁面设置有介电体，用于高效率吸收微波谐振能量。
然而，上述的气溶胶生成装置还有以下缺陷：
1)气溶胶生成制品的烟草材料中添加的微波吸收剂(或吸波体)在市场中通用性很差，增加了产品的使用成本；
2)在理想状态下，优选在一个封闭的金属腔内谐振加热的效率是比较高的，然而气溶胶生成制品是圆柱体状的，上述气溶胶生成装置的加热腔需要设计供气溶胶生成制品插入的开口，这致使谐振腔在装置使用过程中无法完全封闭，从而导致微波加热的效率严重降低。并且此类具有谐振腔的气溶胶生成装置的生产一致性差，存在有微波反射功率偏高的问题，射频信号通过介质天线的回波损耗很难调试到最佳值，从而导致装置在使用中的功耗大，续航降低。
发明内容
本申请实施例提供了一种加热组件及气溶胶生成装置，旨在解决现有加热组件采用谐振腔加热方式易导致气溶胶生成装置的加热效率降低以及功耗增加的技术问题。
第一方面，本申请实施例提供了一种加热组件。所述加热组件用于加热气溶胶生成制品以产生气溶胶，所述加热组件包括：支撑管，限定有用于容纳所述气溶胶生成制品的至少一部分的加热腔；
微波天线，所述微波天线设置于所述支撑管的内表面，所述微波天线至少部分环绕所述加热腔或者限定所述加热腔的至少部分边界，并且所述微波天线用于向所述加热腔内发射射频能量，从而对位于所述加热腔内的所述气溶胶生成制品的至少一部分进行辐射加热。
在一些实施例中，所述微波天线是由平面式微波天线卷绕形成。
在一些实施例中，所述支撑管包括相互连接的第一支撑部和第二支撑部，所述第一支撑部位于所述气溶胶生成制品插入的一端，所述第一支撑部的内径小于所述第二支撑部的内径，所述第一支撑部和所述第二支撑部的连接处形成台阶，所述微波天线抵接于所述台阶。
在一些实施例中，所述支撑管和所述微波天线之间设置有金属层。
在一些实施例中，所述支撑管为陶瓷管、石英玻璃管或聚醚醚酮管。
在一些实施例中，所述微波天线为洋白铜片。
在一些实施例中，所述微波天线呈片状，所述微波天线的厚度为0.2mm至0.7mm。
在一些实施例中，所述微波天线具有周向延伸且相互平行的第一通槽与第二通槽，部分所述支撑管暴露于所述第一通槽与所述第二通槽。
在一些实施例中，所述第一通槽的宽度大于所述第二通槽的宽度。
在一些实施例中，所述微波天线设有用于连接射频能量的输出端的馈电端和用于连接天线参考地的接地端，所述馈电端和所述接地端分别位于所述第一通槽或所述第二通槽的开口两侧。
在一些实施例中，所述支撑管包括第一通孔和第二通孔，所述馈电端暴露于所述第一通孔，所述接地端暴露于所述第二通孔。
在一些实施例中，所述微波天线呈Z形或者F形。
在一些实施例中，所述支撑管还包括第三通孔，所述微波天线包括用于连接温度传感器的焊盘，所述焊盘暴露于所述第三通孔。
在一些实施例中，所述微波天线沿环绕方向上具有相对的第一侧边和第二侧边，所述第一侧边和所述第二侧边互不重叠从而形成间隙。
在一些实施例中，所述微波天线设置有自所述第一侧边朝向所述第二侧边延伸的第一通槽，并且该第一通槽与所述第二侧边存在间距。
在一些实施例中，所述微波天线还设置有自所述第二侧边朝向所述第一侧边延伸的第二通槽，该第二通槽与所述第一侧边存在间距，并且该第二通槽与所述第一通槽在纵向上错开。
在一些实施例中，所述第一通槽与所述第二侧边之间的间距大于所述第二通槽与所述第一侧边之间的间距。
在一些实施例中，所述微波天线包括接地端和馈电端，所述接地端和所述馈电端均位于所述第一侧边，或所述接地端和所述馈电端均位于所述第二侧边。
在一些实施例中，所述微波天线沿所述支撑管纵向的高度为15mm-19mm，或者所述微波天线沿周向展开后的宽度为17mm-23mm。
第二方面，本申请进一步还提出了一种气溶胶生成装置。所述气溶胶生成装置包括电路板组件和上述的加热组件，所述电路板组件用于向所述加热组件提供电能。
区别于现有技术的情况，本申请公开了一种加热组件及气溶胶生成装置。本加热组件采用将微波天线固定于支撑管内部且环绕加热腔的设计，利用加热腔收容和加热气溶胶生成制品，使微波天线得以对气溶胶生成制品进行直接辐射加热。其中，微波的射频能量在经过连接器传递后会通过微波天线近场辐射，由于气溶胶生成制品的基质材料接触或者靠近微波天线，因此在加热过程中不存在或极少有中间介质材料吸收或衰减射频能量的情况；可以大大提升微波加热效率，减少保温阶段功率的耗散。微波天线优选采用平面式天线卷曲环绕加热腔，主要集中在径向上朝向加热腔内部馈送射频能量，因此减小了加热腔的端部开口对微波加热效率的影响。
此外，支撑管套接于微波天线上的结构定位保障了二者之间相对位置的确定，便于调整微波天线辐射能量最大的区域的位置，有助于加热组件对气溶胶生成制品的中间部分进行加热，从而提高加热的效果，提高了微波加热腔长期工作的稳定性和可靠性。上述支撑管和微波天线集成为整体结构，简化了加热组件的结构复杂程度，有助于实现加热组件的小型化设计。
该气溶胶生成装置通过电路板组件向加热组件供电的方式，使微波天线向加热腔中馈入微波，从而使得加热腔内得以顺利地完成对气溶胶生成制品的微波加热，达到加热气溶胶生成制品以产生气溶胶的设计目的。该气溶胶生成装置的结构简单可靠，占用空间小，工作稳定性高且使用寿命长。
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是本发明实施例提供的加热组件的结构示意图；
图2是本发明实施例提供的加热组件的结构示意图。
图3是本发明实施例提供的加热组件的剖面图；
图4是本发明实施例提供的微波天线的展开图；
图5是本发明实施例提供的加热模块和气溶胶生成制品的结构示意图；
图6是本发明实施例提供的加热模块的爆炸图；
图7是本发明实施例提供的气溶胶生成装置和气溶胶生成制品的结构示意图；
图8是本发明实施例提供的气溶胶生成装置和气溶胶生成制品的剖面图；
图9是本发明实施例提供的气溶胶生成装置和气溶胶生成制品的爆炸图；
图10是本发明实施例的微波发生电路的信号传输示意图；
图11是图10的微波发生电路的信号传输示意图之一；
图12是图10的微波发生电路的信号传输示意图之二；
图13是本发明实施例的微波天线的电场模拟图；
图14是本发明实施例的微波天线的磁场模拟图。
附图标记：
100、加热模块；
110、加热组件；
111、微波天线；1111、第一通槽；1112、第二通槽；1113、接地端；1114、
馈电端；1115、第一侧边；1116、第二侧边；11171、第一部分；11172、第二部分；11173、第三部分；1118、焊盘；
112、支撑管；1121、加热腔；1122、第一支撑部；1123、第二支撑部；1124、
台阶；1125、第一通孔；1126、第二通孔；1127、第三通孔；1128、金属层；1129、凸筋；120、模块外壳；
200、电路板组件；
300、装置外壳；
400、气溶胶生成装置；
900、气溶胶生成制品。
具体实施方式
下面将结合附图对本发明的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
在本发明的描述中，需要说明的是，术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”、仅用于描述目的，而不能理解为指示或暗示相对重要性。其中，术语“第一位置”和“第二位置”为两个不同的位置，而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本发明，而不能理解为对本发明的限制。
如本文所使用，术语“气溶胶生成制品900”是指包括气溶胶形成基质的制品，气溶胶形成基质意图进行加热而不是燃烧来释放可形成气溶胶的挥发性化合物。相比于通过燃烧或热解降解气溶胶形成基质产生的气溶胶，通过加热气溶胶形成基质形成的气溶胶可含有更少的已知具有危害性的成分。在一实施例中，气溶胶生成制品900可移除连接到气溶胶生成装置400。
气溶胶形成基质优选采用加热时从基质中释放的挥发化合物的含烟草的材料；也可以是适合于电加热发烟的非烟草材料。气溶胶形成基质优选采用固体基质，可以包括香草叶、烟叶、均质烟草、膨胀烟草中的一种或多种的粉末、颗粒、碎片细条、条带或薄片中的一种或多种；或者，固体基质可以包含附加的烟草或非烟草的挥发性香味化合物，以在基质受热时被释放。合适的气溶胶形成基质可以是内部填充有烟草材料的烟支。
在另一些实施例中，术语“气溶胶生成制品900”是指能够填装气溶胶形成基质的容器或者盒，或者能够保持气溶胶形成基质的其它载体。气溶胶生成制品900包含的气溶胶形成基质可以是液体成分或者液体成分和固体成分的组合。例如合适的气溶胶形成基质包括但不限于：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。优选的气溶胶形成基质是多羟基醇或其混合物，例如三甘醇、1,3-丁二醇且最优选的丙三醇。气溶胶形成基质可包括其它添加剂和成分，例如香料。在一些可选示例中，气溶胶生成制品900还包括用于吸附和保持液体基质的液体保持元件，合适的液体保持元件是由柔性的纤维如棉纤维、无纺布、海绵体等制备的，在另一些示例中，液体保持元件是由例如微孔陶瓷、微孔玻璃或微孔金属等多孔材料构成。
如本文中所使用，术语“气溶胶生成装置400”是与气溶胶生成制品900接合或交互以形成可吸入气溶胶的装置。
气溶胶生成装置400包括加热组件110，加热组件110用于加热气溶胶生成制品900的气溶胶形成基质以生成气溶胶。
如图1至图3所示，本申请的一个实施例提供了一种加热组件110，用于加热气溶胶生成制品900以产生气溶胶，包括支撑管112和微波天线111；支撑管112限定有用于容纳气溶胶生成制品900的至少一部分的加热腔1121；微波天线111设置于支撑管112的内表面，微波天线111至少部分环绕加热腔1121或者限定加热腔1121的至少部分边界，并且微波天线111用于向加热腔1121内发射射频能量，从而对位于加热腔1121内的气溶胶生成制品900的至少一部分进行辐射加热。
可以理解的是，气溶胶生成制品900内的不同基质材料能够不同程度地吸收微波射频能量，基质材料与微波电磁场相互耦合，从而达到能量转化的目的。微波电磁场能量转换的过程包括但不限于离子传导、偶极子转动、界面极化等方式，气溶胶形成基质通过离子传导、偶极子转动等方式吸收微波电磁场能并转化为热量，使其自身整体升温以产生气溶胶，相比传统的加热方式，本申请的加热方式不依靠热传递和对流辐射，减小了在加热过程中气溶胶形成基质内的温度梯度，具有加热速度快且温度均匀一致性高的优点。
该加热组件110采用将微波天线111固定于支撑管112内部的设计，利用加热腔1121收容和加热气溶胶生成制品900，使微波天线111得以对气溶胶生成制品900进行直接接触加热和辐射加热。其中，微波传导能量在经过连接器传递后会通过微波天线111近场辐射。由于气溶胶生成制品900的基质材料接触或者靠近微波天线，因此在加热过程中不存在或极少有中间介质材料吸收或衰减射频能量的情况；可以大大提升微波加热效率，减少保温阶段功率的耗散。微波天线111优选采用平面式天线卷曲环绕加热腔，主要集中在径向上朝向加热腔1121内部馈送射频能量，因此减小了加热腔的端部开口对微波加热效率的影响。同时，支撑管112套接于微波天线111上的结构定位保障了二者之间相对位置的确定，便于调整微波天线111辐射能量最大的区域的位置，有助于加热组件110对气溶胶生成制品900的中间部分进行加热，从而提高加热的效果，提高了微波加热腔1121长期工作的稳定性和可靠性。上述支撑管112和微波天线111集成为整体结构，简化了加热组件110的结构，有助于实现加热组件110的小型化设计。
在本实施例中，支撑管112包括相互连接的第一支撑部1122和第二支撑部1123，第一支撑部1122位于气溶胶生成制品900插入的一侧，第一支撑部1122的内径小于第二支撑部1123的内径，第一支撑部1122和第二支撑部1123的连接处形成台阶1124，微波天线111抵接于台阶1124。
具体地，加热腔1121具有第一开口和第二开口，第一开口设于第一支撑部1122，第二开口设于第二支撑部1123。微波天线111靠近第一开口的一端贴合于台阶1124(即支撑管112内壁台阶面)上，微波天线111的内径大于等于支撑管112在第一开口处的内径。在示例性实施例中，当微波天线111安装至第二支撑部1123内后，其内表面与第一支撑部1122内表面平滑过渡，确保气溶胶生成制品顺利插入。
通过以上限定，降低了微波天线111在支撑管112内的安装难度，确保了支撑管112能够稳定地安装到位，保证了加热组件110对气溶胶生成制品900的加热效果。而通过对内径尺寸的限定，能够规避微波天线111止挡气溶胶生成制品900的情况，减少了微波天线111损伤的风险，降低了吸烟者插入气溶胶生成制品900的难度，有助于提升吸烟者的使用体验。
进一步地，台阶1124呈环形，微波天线111环绕设置支撑管112的内表面。也即第一支撑部1122和第二支撑部1123的横截面的内接圆同心设置，以上限定进一步地降低了微波天线111在支撑管112内的组装难度，简化了支撑管112内的具体结构，降低了支撑管112的生产成本，优化了加热组件110的具体结构。
本实施例中，支撑管112的内壁加工留出台阶1124，微波天线111的内径尺寸需要综合微波天线111在钎焊连接后隆起的厚度进行考虑后选取。将支撑管112表面金属化处理后，利用夹具固定支撑管112和微波天线111，再将微波天线111穿接于支撑管112内，确保微波天线111按照理想位置和形状固定好后，再进行高温钎焊固定操作。
在一些实施例中，在上述微波天线111背离支撑管112的一侧设置有保护层例如釉层，作为示例，保护层大致上仅具有0.1mm-0.5mm(毫米)的厚度，对于微波射频信号的衰减影响是极小的。上述保护层可以通过平滑的内表面，确保气溶胶生成制品900能够顺利地插入加热腔1121或者从加热腔1121移除，同时还能避免在长期使用过程中基质材料产生的残渣、液体腐蚀微波天线111，从而对微波天线111的性能造成影响。
在一些实施例中，支撑管112的材质为陶瓷、石英玻璃、聚醚醚酮或其它可耐高温的塑料。作为可选示例，支撑管112和微波天线111之间设置有金属层1128，金属层1128可以提高微波天线111与支撑管112之间的结合力，另外金属层1128还能够通过发射等方式使辐射能量集中于加热腔内，提高加热效率。例如，当支撑管112的材质为陶瓷时，在支撑管112的表面进行金属化处理得到金属层1128，使金属层1128充当焊盘的作用，便于微波天线111通过与金属层1128焊接而连接于支撑管112，降低了后续焊接操作的难度。又例如，当支撑管112的材质为聚醚醚酮时，微波天线111过盈配合于支撑管112，微波天线111可以通过装配过程过盈配合于聚醚醚酮。
在本申请的另一些实施例中，微波天线111可通过包括但不限于电镀、印刷、喷涂、气相沉积、烧结成型、模内注塑等方式集成于支撑管112内表面从而构成一体结构。例如支撑管112的材质为陶瓷时，微波天线111可以通过与陶瓷浆料一起烧结，从而使微波天线111设置于陶瓷管内。例如支撑管112的材质为塑料时，可通过模具内使塑料模制成型在微波天线的周围从而形成整体。
在本申请的一个实施例中，微波天线111为洋白铜片。在本申请的另一个实施例中，微波天线111包括柔性线路板(FPC，Flexible Printed Circuit)。
在本申请的一个实施例中，微波天线111呈片状，微波天线111的厚度为0.2mm至0.7mm。可选地，微波天线111的厚度为0.2mm、0.3mm、0.4mm、0.5mm、0.6mm或者0.7mm。通过对微波天线111的材质和厚度的限定，保障了微波天线111的发热效果和辐射效果，确保了微波天线111能够对气溶胶生成制品900顺利地进行直接接触加热和辐射加热。此外，由于微波天线111为面状线材或带状线材且具有一定的宽度，相比传统的线状走线的螺旋天线而言，本申请中的微波天线111能够在加热腔内提供较大面积的辐射投影，这有利于提高加热组件110的微波加热效率。
进一步地，微波天线111钎焊连接于金属层1128。陶瓷管和聚醚醚酮管的生产成本低，工作稳定性高且使用寿命长，同时聚醚醚酮和陶瓷的导热性能相对于金属材料较弱，能够有效地遏制加热腔1121内热量的外泄，从而有效地提高了加热组件110的保温能力，有助于提升加热组件110微波加热效率，减少加热组件110在保温阶段的功率耗散。钎焊连接具备可靠性高、适应范围广、加工简便和质量可控的优点，有助于实现微波天线111与支撑管112之间长期稳定的连接，配合金属层1128的设置，能够保证微波天线111与支撑管112之间的连接效果，由此保障了加热组件110的长期稳定运行。
在本实施例中，微波天线111具有周向延伸且相互平行的第一通槽1111与第二通槽1112，部分支撑管112暴露于第一通槽1111与第二通槽1112。在一些实施例中，微波天线111的形状呈Z形或者F形，并且环绕在上述支撑管112内表面构造成环带状。作为可选示例，上述微波天线111可以是平面式倒F天线(Planar Inverted-F Antenna，PIFA)，采用PIFA天线对于减小加热组件110的体积是有利的。在一些实施例中，微波天线111呈Z字型。以上设计限定了微波天线111的具体结构，确保了微波天线111的稳定工作，确保了微波天线111能够顺利地向加热腔1121中馈入微波，保障了加热组件110对气溶胶生成制品900的加热效果。
在一些实施例中，微波天线111是柔性可卷曲的，微波天线111包括柔性薄膜和承载于柔性薄膜上的导体材料，导体材料具有一定的耐腐蚀性和较好的导电性，包括但不限于铝、铜、钨等金属材质以及合金，例如合适的微波天线111可以是柔性线路板(FPC，Flexible Printed Circuit)。或者在另一些示例中，微波天线111可以是洋白铜片材，FPC与洋白铜片材材质柔软，因此微波天线111能够进行弯曲，使微波天线111能够围绕贴合支撑管112。在一些示例性实施例中，加热组件110还包括定位部件，定位部件用于将FPC或洋白铜片材保持在支撑管112内表面而不产生位移，例如常用的定位部件包括热缩管以及耐高温的胶带等。
在本申请的一个实施例中，当微波天线111被贴装于支撑管112的内表面。在本申请的一个实施例中，微波天线111的导体材料集成于支撑管112上。在另一些可替代的实施例中，微波天线111包括导体材料的膜层结构，膜层结构具有特定的图案形状(参照图4)，膜层结构可以通过不限于印刷、喷涂、蚀刻或气相沉积等方式结合并集成于支撑管内表面。
微波天线111展开后的宽度与高度是与支撑管112的外径以及纵向长度相互匹配的，在本实施例中微波天线111周向宽度小于支撑管112的周长，从而能够确保微波天线111能够刚好贴装在支撑管112的表面，同时微波天线111沿宽度方向的两侧边在微波天线111围绕设置在支撑管112的外壁时不会重叠，避免重叠部分影响微波天线111的辐射效率。在高度方向上，微波天线111可以基本覆盖或者部分覆盖支撑管112的纵向长度；可以理解的是，微波天线111的高度是与气溶胶生成制品900内的气溶胶生成基质段的长度相匹配的，这样使得天线的辐射区域能够有效覆盖基质材料。
可以理解的是，呈环绕形式的微波天线111，提供合适尺寸的内径以及纵向高度对于提高加热效率是有帮助的，在合适的实施例中，如图1-图3所示，在本实施例中，微波天线111沿支撑管112纵向的高度为15mm-19mm，微波天线111沿周向展开后的宽度为17mm-23mm，进而卷绕围成的管形天线具有适当的内径，使得在工作中加热腔中的气溶胶生成基质的轴线中心也能够具有足以使基质材料中的一种或多种成分挥发的电场或磁场强度，有利于提升气溶胶生成基质的加热均匀性。
进一步地，微波天线111设有用于连接射频能量的输出端的馈电端1114和用于连接天线参考地的接地端1113，馈电端1114和接地端1113分别位于第一通槽1111或第二通槽1112的开口两侧。以上设计实现了对馈电端1114和接地端1113的位置布局，降低了焊接操作的难度，保障了微波天线111与外部环境的顺利连接，进一步地保证了加热组件110的长期稳定运行。
在本申请的一个实施例中，微波天线111沿环绕方向上具有相对的第一侧边1115和第二侧边1116，第一侧边1115和第二侧边1116互不重叠从而形成间隙。因为微波天线111沿长度方向X的两侧边在微波天线111围绕设置在支撑管112的外壁时产生重叠，重叠部分会影响微波天线111回波损耗，导致射频辐射出去的能量传输效率受到严重影响。因此如图1-图2所示，本实施例的微波天线111的第一侧边1115和第二侧边1116不重叠并且具有间隙。
在本申请的一个实施例中，如图2所示，支撑管112还包括凸筋1129，凸筋1129位于第一侧边1115和第二侧边1116之间，凸筋1129的设计可以在微波天线111安装至支撑管112时起到定位的作用，使得微波天线111安装至支撑管112后馈电端1114暴露于第一通孔1125，接地端1113暴露于第二通孔1126。
在本申请的一个实施例中，微波天线111包括由第一通槽1111和第二通槽1112分隔的第一部分11171、第二部分11172和第三部分11173，第一部分11171、第二部分11172和第三部分11173在垂直于第一通槽1111和第二通槽1112的方向上的尺寸分别为L1、L2、L3，L3＞L1>L2。
在本申请的一个实施例中，微波天线111设置有自第一侧边1115朝向第二侧边1116延伸的第一通槽1111，并且该第一通槽1111与第二侧边1116存在间距L4。在本申请的一个实施例中，微波天线111还设置有自第二侧边1116朝向第一侧边1115延伸的第二通槽1112，该第二通槽1112与第一侧边1115存在间距L5，并且该第二通槽1112与第一通槽1111在纵向上错开。在本申请的一个实施例中，第一通槽1111与第二侧边1116之间的间距L4大于第二通槽1112与第一侧边1115之间的间距L5。
在本申请的一个实施例中，微波天线111设置有沿环绕方向或者展开宽度方向延伸且相互平行的第一通槽1111与第二通槽1112，部分支撑管112暴露于第一通槽1111与第二通槽1112。在本申请的一个实施例中，第一通槽1111的宽度L6大于第二通槽1112的宽度L7。
如图4所示，在一些实施例中，微波天线111呈Z型。即，第一通槽1111和第二通槽1112分别从微波天线111的左边缘与右边缘向中心延伸，且第一通槽1111和第二通槽1112沿高度方向Y位于微波天线111的中间。在本申请的一个实施例中，微波天线111可以呈F型。
在本申请的一个实施例中，如图4所示，微波天线111包括接地端1113和馈电端1114，接地端1113和馈电端1114分别位于第一通槽1111的开口两侧，微波天线111在第一通槽1111附近的电磁波辐射最强。例如参见图13所示的加热组件在通电时的电场分布图以及图14所示的磁场分布图，当接地端1113和馈电端1114位于第一通槽1111的开口两侧时，微波天线111在第一通槽1111附近的电场强度和磁场强度是最高的。作为优选的示例，第一通槽1111大致上开设于微波天线111的纵向高度的中间位置(参见图4)。根据气溶胶生成基质的既定长度，可以设计成第一通槽1111定位于加热腔在纵向上的特定位置，使得气溶胶生成装置在使用过程中，当气溶胶生成制品900插入加热腔时，第一通槽1111能够沿纵向基本对准气溶胶生成基质的中间位置，从而最大化地吸收射频能量，有利于提高气溶胶生成基质的升温速度。或者在一些替代性实施例中，接地端1113和馈电端1114分别位于第二通槽1112的开口两侧。
在本申请的一个实施例中，微波天线111包括接地端1113和馈电端1114，接地端1113和馈电端1114均位于第一侧边1115，或接地端1113和馈电端1114均位于第二侧边1116，也即接地端1113和馈电端1114均位于微波天线111的同一个侧边。在本申请的一个实施例中，气溶胶生成制品900包括相互连接的滤嘴段和发烟段，滤嘴段供用户含衔，发烟段包括发烟物质，经加热组件110加热后，发烟段可产生气溶胶供用户抽吸。在本申请的一个实施例中，设有馈电端1114和接地端1113的第一通槽1111或第二通槽1112处微波的能量最高，气溶胶生成制品900的发烟段的中部与设有馈电端1114和接地端1113的第一通槽1111或第二通槽1112的位置相对应，使得气溶胶生成制品900的发烟段的中部吸收的微波能量最多，有利于发烟段快速地产生气溶胶。
再进一步地，支撑管112包括贯穿内外侧面的第一通孔1125和第二通孔1126，馈电端1114暴露于第一通孔1125，接地端1113暴露于第二通孔1126，方便于微波天线的射频线缆焊接于馈电端1114以及接地端1113；支撑管112还包括第三通孔1127，微波天线111包括用于连接温度传感器的焊盘1118，焊盘1118暴露于第三通孔1127，温度传感器通过第三通孔1127连接于焊盘1118，使得温度传感器可以感测加热组件110的温度。
通过设置第一通孔1125和第二通孔1126的方式，降低了焊盘在加热组件110上的集成难度，由此简化了加热组件110的具体结构，提升了加热组件110的结构稳定性，降低了焊盘因意外而脱离加热组件110的难度，延长了加热组件110的使用寿命，保证了加热组件110的长期稳定运行，确保了其余构件与加热组件110之间的顺利连接。
具体地，三个电缆对应地焊接于馈电端1114、接地端1113和焊盘1118上。
本实施例中，天线参考地和射频能量的输出端为本领域内的常规设置，其设置目的及具体连接方式为本领域内的公知常识，由本领域内的技术人员所熟知，在此不多加赘述。
如图7至图9所示，本实施例还提供了一种气溶胶生成装置400，包括电路板组件200和上述的加热组件110，电路板组件200用于向加热组件110提供电能。
该气溶胶生成装置400通过电路板组件200向加热组件110供电的方式，使微波天线111向加热腔1121中馈入微波，从而使得加热腔1121内得以顺利地完成对气溶胶生成制品900的微波加热，达到加热气溶胶生成制品900以产生气溶胶的设计目的。该气溶胶生成装置400的结构简单可靠，占用空间小，工作稳定性高且使用寿命长。
加热组件110安装于模块外壳120，模块外壳120由多个构件拼接而成，用于防护加热组件110。加热组件110和模块外壳120均属于加热模块100。
气溶胶生成装置400还包括装置外壳300，加热模块100和电路板组件200均安装于装置外壳300内。装置外壳300由多个构件拼接而成，用于防护加热模块100和电路板组件200。
该气溶胶生成装置400在一些实施例中可为加热不燃烧式气溶胶生成装置400，且可为手持式，其可用于加热包含固态烟草的气溶胶生成制品900，例如烟支。
在一些实施例中，气溶胶生成装置400采用微波加热的方式。具体的，气溶胶生成装置400包括围绕设置在支撑管112外壁上的微波天线111，微波天线111与电路板组件200电连接，电路板组件200上集成有微波发生电路与控制器，控制器与微波发生电路连接。
如图10所示，在一些实施例中，微波发生电路包括：集成芯片、环形器、微带、PI型衰减器、功率检测器与负载。环形器安装在加热腔1121的外部，集成芯片的输出端与环形器的第一端连接，环形器的第二端连接到微波天线111，集成芯片输出的微波经过环形器的第一端和第二端馈入微波天线111内，加热腔1121内的气溶胶产生基质在微波的作用下加热而释放气溶胶。环形器的第二端还能够接收到微波天线111反馈的微波信号，并将反馈的微波信号经过环形器的第二端传输至环形器的第三端。
集成芯片输出传导频率为f、功率为Pout的射频信号到环形器的第一端，环形器的第二端输出射频信号到微波天线111，由于微波天线111的频率会有偏移，微波天线111工作在偏移的宽带内，微波天线111在不同频率下的回波损耗不一样，因此会有部分射频信号反射到环形器的第三端，从而被大功率负载吸收。
作为可选的示例，集成芯片为使用单个集成振荡电路及20-40W(瓦特)的单极氮化镓射频功率放大器在一个基片上的振荡器功放芯片。以上集成芯片外部的栅极、漏极和反馈网络的微带匹配占用的空间很小，有利于气溶胶生成装置400产品集成小型化。单极氮化镓射频功率放大器的功率还可以选择为20-25W、25-30W、30-35W或35-40W。
如图11所示，在一些实施例中，集成芯片的振荡电路为压控振荡器VCO(Voltage Controlled Oscillator)与衰减器ATT(Attenuator)集成，可以调节输出功率，输出功率依次经过集成第一级功率放大器、推动级功率放大器+末级功率放大器；或者如图12所示，输出功率依次经过集成第一级功率放大器+推动级功率放大器、末级功率放大器。环形器是一种将射频传导信号单向传输的器件，环形器中信号的导通方向为从第一端至第二端导通，从第二端至第三端导通。
参考图10、图11或图12所示，在一些可能实施的方案中，大功率负载选择在高频状态下工作，大功率负载的额定功率大于微波天线111的最大反射功率，作为可选示例，大功率负载的阻值为50欧姆或更大阻值，大功率负载的作用是吸收微波天线111反射回来的能量。
在一些实施例中，微带包括正向输出微带和反射微带，正向输出微带的两端分别连接集成芯片的输出端与PI型衰减器(PI为希腊字母π)，反射微带的两端分别连接负载与功率检测器，正向输出微带和反射微带耦合具有一定的耦合度，微带耦合正向输出端和反射端的功率，控制器的采样引脚MCU_AD1(MCU为Microcontroller Unit，微控制器单元；AD为Analog to Digital，模数转换)通过PI型衰减器采集输出端的电压值V耦合，以及采样引脚MCU_AD2通过功率检测器采集反射端的电压值V反射，从而可以映射计算出正向输出端功率和反射端功率的大小，进一步通过正向输出端功率和反射端功率的比例关系可以计算出微波天线111的回波损耗。
在另一些实施例中，微带包括反射微带，反射微带的两端分别连接负载与功率检测器，通过功率检测器也能映射到反射回来的微波信号的功率值，控制器能够通过变化的功率值与回波损耗之间的映射关系也能实际映射回波损耗值。
在又一些实施例中，正向输出微带和反射微带可以省去，使用集成芯片工作的稳定电流浮动变化判断集成芯片的稳定性，电流增大预示微波天线的反射信号增强导致回波损耗变小，而当电流变小时则预示回波损耗的值增大，微波加热的效率提升。
在一些实施例中，集成芯片在频率范围为2430MHz-2460MHz(兆赫兹)内工作，根据回波损耗RL＝20log(VSWR+1/VSWR-1)＝20log(P输出/P反射)＝20log(V耦合/V反射)计算气溶胶生成制品900在各频率下的回波损耗，其中P输出和P反射对应为正向输出端的射频功率和反射端的反射功率，V耦合和V反射对应为正向输出端的电压值和反射端的电压值，VSWR为Voltage Standing Wave Ratio的缩写，表示电压驻波比。例如作为示例，集成芯片输出基准频率为2449MHz，功率为Pout的射频能量通过环形器的第一端输入，且通过第二端传导输出到微波天线111，通过第三端接收微波天线111反射回来的微波能量并转移给负载。在气溶胶生成装置400的工作过程中，加热组件110的热量会部分传递给微波发生电路，随着温度升高或者降低，集成芯片输出频率会增大或者减小，最大不超过2460MHz，最小不小于2430MHz。因此微波天线111调试的最佳回波损耗必须覆盖这些频率范围。
例如作为一些测试的示例，当回波损耗大于等于10，则微波天线111的功率传输效率大于90％；当回波损耗大于等于13.7，则微波天线111的功率传输效率大于95.7％；当回波损耗大于等于18.2，则微波天线111的功率传输效率大于98.5％。
通过以上测试可知在本实施例中，作为合适的示例性频率选择，微波天线111的加热频率为2430MHZ-2460MHZ，在这一频段中微波天线111的回波损耗大于等于10，微波天线111的传输效率大于90％，对气溶胶生成制品900的加热效果较佳。
现有的集成芯片的输出端未设置环形器，直接连接微波天线111，当微波天线111的回波损耗变差，微波会反射回集成芯片的输出端，导致自激损坏集成芯片。因此本实施例通过在集成芯片的输出端增加环形器，使微波天线111的反射回来的微波由负载吸收，从而保护了集成芯片。
在本申请的另一些实施例中，集成芯片选取最佳传输效率的前5个频率点中的最佳工作频率点作为实际微波加热的频率点，加热控制方法如下：控制器控制集成芯片输出频率为f、功率为Pout的微波信号；微波信号通过环形器的第一端输入，第二端传导输出到片状微波天线；片状微波天线反射部分微波信号到环形器的第三端；微带耦合环形器的第一端和第三端的功率，且分别通过PI型衰减器和功率检测器输出V耦合和V反射给控制器；控制器根据回波损耗RL＝20log(VSWR+1/VSWR-1)＝20log(P输出/P反射)＝20log(V耦合/V反射)计算该输出频率的回波损耗；控制器根据预设调整值增大或减少集成芯片的输出频率，重复执行上述步骤，直至集成芯片的输出频率遍历2430MHz-2460MHz，得到多个输出频率的回波损耗值；控制器选取回波损耗大于10所对应的输出频率，并将回波损耗大于10的输出频率和其对应的传输效率记录在数组形成映射关系；控制器从数组中选取最佳传输效率的前5个输出频率，并从5个输出频率中选取最佳的输出频率作为集成芯片的实际输出频率。通过上述加热控制方法对气溶胶生成装置400进行控制，可以选取出最佳传输效率的前5个输出频率，并从中选取最佳的输出频率作为集成芯片的实际输出频率，使片状微波天线111在传输效率大于90％时以最佳输出频率对气溶胶生成制品900加热，提升了加热效率。需要说明的是，预设调整值可以根据需要通过控制器进行设置，在本实施例中预设调整值可以设置为2MHz。
可以理解的是，气溶胶生成装置400在加热使用过程中，微波发生电路可输出固定不变频率的微波信号。例如在一些示例性实施例中，在装置的长期使用过程中微波天线的最佳频率点可能产生偏移，因此在微波发生电路中的控制器中内置有以上筛选最佳输出频率的程序，当气溶胶生成装置400每次启动后或者定期的，集成芯片调用运行该程序从而通过以上方法确定最佳输出频率，然后采用该最佳输出频率通过微波天线馈送射频能量，从而控制加热组件110开始工作。又例如在另一些示例性实施例中，气溶胶生成装置400仅仅在出厂前的调试阶段可以采用以上方法来确定最佳输出频率，并且在气溶胶生成装置400的实际使用过程中采用该确定的最佳输出频率来加热。
在另一些示例性实施例中，气溶胶生成装置400在加热使用过程中，微波发生电路可输出频率可变化的微波信号。例如由于温度变化等因素可能影响微波天线的频率偏移，因此微波发生电路中的控制器被配置可实时或阶段性地采集微波天线的反馈信号参数并计算回波损耗值，从而根据回波损耗值的变化来调整输出给微波天线的最佳输出频率。
区别于现有技术的情况，本申请公开了一种加热组件及气溶胶生成装置。本加热组件采用将微波天线固定于支撑管内部且环绕加热腔的设计，利用加热腔收容和加热气溶胶生成制品，使微波天线得以对气溶胶生成制品进行直接辐射加热。其中，微波的射频能量在经过连接器传递后会通过微波天线近场辐射，由于气溶胶生成制品的基质材料接触或者靠近微波天线，因此在加热过程中不存在或极少有中间介质材料吸收或衰减射频能量的情况；可以大大提升微波加热效率，减少保温阶段功率的耗散。微波天线优选采用平面式天线卷曲环绕加热腔，主要集中在径向上朝向加热腔内部馈送射频能量，因此减小了加热腔的端部开口对微波加热效率的影响。
此外，支撑管套接于微波天线上的结构定位保障了二者之间相对位置的确定，便于调整微波天线辐射能量最大的区域的位置，有助于加热组件对气溶胶生成制品的中间部分进行加热，从而提高加热的效果，提高了微波加热腔长期工作的稳定性和可靠性。上述支撑管和微波天线集成为整体结构，简化了加热组件的结构复杂程度，有助于实现加热组件的小型化设计。
该气溶胶生成装置通过电路板组件向加热组件供电的方式，使微波天线向加热腔中馈入微波，从而使得加热腔内得以顺利地完成对气溶胶生成制品的微波加热，达到加热气溶胶生成制品以产生气溶胶的设计目的。该气溶胶生成装置的结构简单可靠，占用空间小，工作稳定性高且使用寿命长。
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，但并不限于本说明书所描述的实施例，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 (20)

  1. 一种加热组件，用于加热气溶胶生成制品以产生气溶胶，其特征在于，包括：
    支撑管，限定有用于容纳所述气溶胶生成制品的至少一部分的加热腔；
    微波天线，所述微波天线设置于所述支撑管的内表面，所述微波天线至少部分环绕所述加热腔或者限定所述加热腔的至少部分边界，并且所述微波天线用于向所述加热腔内发射射频能量，从而对位于所述加热腔内的所述气溶胶生成制品的至少一部分进行辐射加热。
  2. 根据权利要求1所述的加热组件，其特征在于，所述微波天线是由平面式微波天线卷绕形成。
  3. 根据权利要求1或2所述的加热组件，其特征在于，所述支撑管包括相互连接的第一支撑部和第二支撑部，所述第一支撑部位于所述气溶胶生成制品插入的一端，所述第一支撑部的内径小于所述第二支撑部的内径，所述第一支撑部和所述第二支撑部的连接处形成台阶，所述微波天线抵接于所述台阶。
  4. 根据权利要求1所述的加热组件，其特征在于，所述支撑管和所述微波天线之间设置有金属层。
  5. 根据权利要求1所述的加热组件，其特征在于，所述支撑管为陶瓷管、石英玻璃管或聚醚醚酮管。
  6. 根据权利要求1所述的加热组件，其特征在于，所述微波天线为洋白铜片。
  7. 根据权利要求2所述的加热组件，其特征在于，所述微波天线呈片状，所述微波天线的厚度为0.2mm至0.7mm。
  8. 根据权利要求1所述的加热组件，其特征在于，所述微波天线具有周向延伸且相互平行的第一通槽与第二通槽，部分所述支撑管暴露于所述第一通槽与所述第二通槽。
  9. 根据权利要求8所述的加热组件，其特征在于，所述第一通槽的宽度大于所述第二通槽的宽度。
  10. 根据权利要求8所述的加热组件，其特征在于，所述微波天线设有用于连接射频能量的输出端的馈电端和用于连接天线参考地的接地端，所述馈电端和所述接地端分别位于所述第一通槽或所述第二通槽的开口两侧。
  11. 根据权利要求10所述的加热组件，其特征在于，所述支撑管包括第一通孔和第二通孔，所述馈电端暴露于所述第一通孔，所述接地端暴露于所述第二通孔。
  12. 根据权利要求2所述的加热组件，其特征在于，所述微波天线呈Z形或者F形。
  13. 根据权利要求1所述的加热组件，其特征在于，所述支撑管还包括第三通孔，所述微波天线包括用于连接温度传感器的焊盘，所述焊盘暴露于所述第三通孔。
  14. 根据权利要求1所述的加热组件，其特征在于，所述微波天线沿环绕方向上具有相对的第一侧边和第二侧边，所述第一侧边和所述第二侧边互不重叠从而形成间隙。
  15. 根据权利要求14所述的加热组件，其特征在于，所述微波天线设置有自所述第一侧边朝向所述第二侧边延伸的第一通槽，并且该第一通槽与所述第二侧边存在间距。
  16. 根据权利要求15所述的加热组件，其特征在于，所述微波天线还设置有自所述第二侧边朝向所述第一侧边延伸的第二通槽，该第二通槽与所述第一侧边存在间距，并且该第二通槽与所述第一通槽在纵向上错开。
  17. 根据权利要求16所述的加热组件，其特征在于，所述第一通槽与所述第二侧边之间的间距大于所述第二通槽与所述第一侧边之间的间距。
  18. 根据权利要求14所述的加热组件，其特征在于，所述微波天线包括接地端和馈电端，所述接地端和所述馈电端均位于所述第一侧边，或所述接地端和所述馈电端均位于所述第二侧边。
  19. 根据权利要求1所述的加热组件，其特征在于，所述微波天线沿所述支撑管纵向的高度为15mm-19mm，或者所述微波天线沿周向展开后的宽度为17mm-23mm。
  20. 一种气溶胶生成装置，其特征在于，包括电路板组件和权利要求1-19任一项所述的加热组件，所述电路板组件用于向所述加热组件提供电能。
PCT/CN2025/090829 2024-05-29 2025-04-24 加热组件及气溶胶生成装置 Pending WO2025246743A1 (zh)

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CN112137167A (zh) * 2019-06-28 2020-12-29 北京航天雷特机电工程有限公司 一种微波天线及电子烟
CN219373813U (zh) * 2022-12-22 2023-07-21 思摩尔国际控股有限公司 气溶胶产生装置及其微波加热组件
CN117981911A (zh) * 2022-11-07 2024-05-07 思摩尔国际控股有限公司 气溶胶产生装置及其微波加热组件
CN117981919A (zh) * 2022-11-07 2024-05-07 思摩尔国际控股有限公司 微波加热组件及气溶胶生成装置
CN118077965A (zh) * 2024-03-14 2024-05-28 中国电子科技集团公司第十三研究所 微波加热天线及烟具

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112137167A (zh) * 2019-06-28 2020-12-29 北京航天雷特机电工程有限公司 一种微波天线及电子烟
CN117981911A (zh) * 2022-11-07 2024-05-07 思摩尔国际控股有限公司 气溶胶产生装置及其微波加热组件
CN117981919A (zh) * 2022-11-07 2024-05-07 思摩尔国际控股有限公司 微波加热组件及气溶胶生成装置
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