WO2025256397A1 - 气溶胶生成装置和加热组件 - Google Patents

气溶胶生成装置和加热组件

Info

Publication number
WO2025256397A1
WO2025256397A1 PCT/CN2025/097236 CN2025097236W WO2025256397A1 WO 2025256397 A1 WO2025256397 A1 WO 2025256397A1 CN 2025097236 W CN2025097236 W CN 2025097236W WO 2025256397 A1 WO2025256397 A1 WO 2025256397A1
Authority
WO
WIPO (PCT)
Prior art keywords
microwave antenna
planar microwave
heating
heating assembly
aerosol
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/CN2025/097236
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
Application filed by Shenzhen FirstUnion Technology Co Ltd filed Critical Shenzhen FirstUnion Technology Co Ltd
Publication of WO2025256397A1 publication Critical patent/WO2025256397A1/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
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A24D1/20—Cigarettes specially adapted for simulated smoking devices
    • 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
    • A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/50—Control or monitoring

Definitions

  • This application relates to the field of electronic atomization technology, specifically to an aerosol generating device and a heating component.
  • the aerosol generating device heats the aerosol generating product to a temperature that allows it to produce aerosols but not enough to burn. It enables the aerosols in the aerosol generating product to form a matrix and generate the aerosols needed by the user without combustion.
  • an aerosol generating device has a spiral microwave antenna coil on the outer surface of a support tube.
  • the coil When energized, the coil can emit electromagnetic waves to form a microwave electromagnetic field. Under the combined action of the microwave electromagnetic field and the aerosol generating matrix, microwave energy is rapidly converted into heat to heat the aerosol generating matrix.
  • microwave energy is rapidly converted into heat to heat the aerosol generating matrix.
  • this type of spiral coil microwave antenna as a radiation source results in low heating efficiency and energy utilization of the aerosol generating device, which affects the heating rate of the heating components and the endurance of the aerosol generating device.
  • the microwave antenna coil needs to be wound or electroplated and etched on the surface of the support tube, which increases the complexity of the product structure and the cost.
  • this invention provides an aerosol generating device and a heating component for heating aerosol-generated products, aiming to solve the problems of low heating efficiency of helical coil microwave antennas and increased complexity and cost of product structure.
  • the present invention adopts the following technical solution:
  • One embodiment of this application provides a heating assembly for heating aerosol-generated articles, comprising:
  • a support tube defines a heating cavity for accommodating at least a portion of an aerosol-generating article comprising an aerosol-forming matrix; a planar microwave antenna configured as a sheet or film structure and disposed around the outer surface of the support tube, the planar microwave antenna being used to emit radio frequency energy when energized and conduct it to the heating cavity, thereby heating the aerosol-forming matrix in the aerosol-generating article within the heating cavity to generate aerosols.
  • One embodiment of this application provides a heating assembly, wherein the planar microwave antenna has opposing first and second sides along a circumferential direction, the first and second sides not overlapping to form a gap.
  • One embodiment of this application provides a heating assembly, wherein the planar 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.
  • One embodiment of this application provides a heating assembly, wherein the planar 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.
  • One embodiment of this application provides a heating assembly in which 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.
  • One embodiment of this application provides a heating assembly, wherein the planar microwave antenna is provided with a first through slot and a second through slot that extend parallel to each other along the circumferential direction or the unfolded width direction, and a portion of the support tube is exposed in the first through slot and the second through slot.
  • One embodiment of this application provides a heating assembly in which the width of the first through slot is greater than the width of the second through slot.
  • One embodiment of this application provides a heating assembly, characterized in that the planar microwave antenna is Z-shaped or F-shaped.
  • planar microwave antenna includes a ground terminal and a feed terminal, the ground terminal and the feed terminal being located on opposite sides of the opening of the first through slot.
  • One embodiment of this application provides a heating assembly, wherein the planar microwave antenna includes a ground terminal and a feed terminal, wherein the ground terminal and the feed terminal are both located on the first side, or the ground terminal and the feed terminal are both located on the second side.
  • One embodiment of this application provides a heating assembly, characterized in that the height of the planar microwave antenna along the longitudinal direction of the support tube is 15mm-19mm, or the width of the planar microwave antenna after being unfolded circumferentially is 20mm-29mm.
  • One embodiment of this application provides a heating assembly, characterized in that the support tube is a cylindrical structure made of quartz, ceramic or plastic.
  • planar microwave antenna includes a flexible circuit board, or the conductor material of the planar microwave antenna includes nickel silver.
  • One embodiment of this application provides a heating assembly, wherein the radio frequency energy transmission efficiency of the planar microwave antenna is greater than 90%, or the return loss of the planar microwave antenna is greater than 10.
  • One embodiment of this application provides a heating assembly, wherein the heating frequency of the planar microwave antenna is 2430MHz-2460MHz.
  • One embodiment of this application provides a heating assembly in which the planar microwave antenna is attached to the outer surface of the support tube, or the conductor material of the planar microwave antenna is integrated onto the support tube.
  • One embodiment of this application provides an aerosol generating device, including a battery assembly and a heating assembly provided in any of the above embodiments, wherein the battery assembly provides electrical energy to the heating assembly.
  • the aerosol generating apparatus and its heating component for heating aerosol-generated products described in the above embodiments have the following advantages:
  • the heating component of this application uses a planar microwave antenna, which is disposed on the outer surface of the support tube, allowing the planar microwave antenna to surround the heating cavity.
  • the planar microwave antenna radially conducts radio frequency energy into the heating cavity, radiating and heating the aerosol-generated products within the heating cavity.
  • planar microwave antenna which surrounds the outer surface of the support tube, has a very small thickness, which is beneficial for reducing the volume of the heating component and miniaturizing the aerosol generating apparatus.
  • planar microwave antenna in the heating component of this application can be attached to the support tube using a roll-up mounting method, reducing the complexity of the product structure and assembly costs.
  • Figure 1 is a perspective view of the aerosol generating device according to an embodiment of the present invention.
  • Figure 2 is a perspective view of the aerosol generating device according to an embodiment of the present invention.
  • Figure 3 is a schematic diagram of the internal structure of the aerosol generating device according to an embodiment of the present invention.
  • Figure 4 is a cross-sectional view of the aerosol generating apparatus according to an embodiment of the present invention.
  • Figure 5 is an assembly diagram of the heating assembly according to an embodiment of the present invention.
  • Figure 6 is a schematic diagram of the unfolded planar microwave antenna according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of signal transmission of the microwave generator circuit according to an embodiment of the present invention.
  • FIG 8 is one of the signal transmission schematic diagrams of the microwave generator circuit in Figure 7;
  • FIG. 9 is the second schematic diagram of signal transmission in the microwave generator circuit of Figure 7;
  • Figure 10 is a simulation diagram of the electric field of the planar microwave antenna according to an embodiment of the present invention.
  • Figure 11 is a magnetic field simulation diagram of a planar microwave antenna according to an embodiment of the present invention.
  • Aerosol generating device 11. Heating assembly; 111. Planar microwave antenna; 1111. 1112 First through slot; 1113 Second through slot; 1114 Grounding terminal; 1115 Power supply terminal; 1116 First side; 1117 Second side; 1118 First part; 1119 Third part; 112 Support tube; 1121 Heating chamber; 113 Heat insulation component; 12 Housing; 120 Charging port; 121 First cavity; 122 Second cavity; 123 Third cavity; 13 Cover; 130 Insertion port; 14 Bracket; 15 Power supply unit; 16 Circuit board; 17 Control button; 18 Aerosol generating product; 181 Filter part; 182 Smoke generating part.
  • one embodiment of this application provides an aerosol generating device 1, which can be used to heat an aerosol generating article 18 to cause the aerosol generating article 18 to volatilize aerosols for users to inhale.
  • aerosol generating article 18 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 18 is removably connected to the aerosol generating apparatus 1.
  • 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.
  • aerosol generating article 18 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 aerosol generating article 18 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 18 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 1 is an apparatus that is engaged or interacts with aerosol generating article 18 to heat or vaporize matrix material within aerosol generating article 18 to form an inhalable aerosol.
  • the aerosol generating apparatus 1 includes a heating component 11, which is used to heat the aerosol forming matrix of the aerosol generating article 18 to generate aerosol.
  • the aerosol generating device 1 includes a housing 12 and a cover 13.
  • the cover 13 covers the housing 12 to form a cavity.
  • the aerosol generating device 1 also includes a heating component 11, a support 14, a power supply unit 15, and a circuit board 16 housed in the cavity.
  • the heating component 11 includes a planar microwave antenna 111 and a support tube 112.
  • the bracket 14 is mounted and fixed on the housing 12, and the heating component 11, power supply unit 15 and circuit board 16 are mounted on the bracket 14.
  • the bracket 14 divides the interior of the housing 12 into a first cavity 121 and a second cavity 122.
  • the circuit board 16 is installed in the first cavity 121, and the power supply unit 15 is installed in the second cavity 122.
  • the bracket 14 and the cover 13 form a third cavity 123, and the heating assembly 11 is installed in the third cavity 123.
  • the heating assembly 11 further includes a heat insulation element 113, which is mounted on the bracket 14.
  • the support tube 112 is fixed inside the heat insulation element 113.
  • the heat insulation element 113 can limit the radial transfer of heat to the housing 12, thereby improving the heating efficiency of the heating assembly 11 and preventing heat transfer to the housing 12 from affecting the user experience.
  • the heat insulation component 113 is preferably made of a plastic material with good heat insulation properties, such as PEEK.
  • PEEK polyetheretherketone
  • the heat insulation component 113 can be constructed in the form of a vacuum tube. Because the vacuum tube is in a vacuum state, and vacuum has a heat insulation effect, the heat from the heating component 11 can be isolated by the vacuum tube, preventing the heat from the heating component 11 from being transferred to the housing 12.
  • the heat insulation component 113 can be covered or surrounded by aerogel around the support tube 112 to provide heat insulation.
  • the heat insulation component 113 surrounds the planar microwave antenna 111, causing the planar microwave antenna 111 to bend and remain in a non-closed ring shape.
  • the heat insulation component 113 also provides support, allowing the planar microwave antenna 111 to remain in a specific position on the support tube 112 and immobile.
  • the power supply unit 15 supplies power to the operating circuitry on the circuit board 16, which controls the planar microwave antenna 111 to start or stop operating and to control the output microwave frequency.
  • the circuit board 16 is also connected to a control button 17, which is exposed outside the housing 13 through a button hole, allowing the user to control the planar microwave antenna 111 to start or stop operating.
  • the power supply unit 15 includes a rechargeable or non-rechargeable battery cell.
  • the power source is a lithium-ion battery.
  • the power source may be a nickel-metal hydride battery, a nickel-cadmium battery, or a lithium-based battery, such as a lithium cobalt, lithium iron phosphate, lithium titanate, or lithium polymer battery.
  • the power supply unit 15 is a rechargeable battery cell, so the circuit board 16 is also provided with a charging module, and the housing 12 is provided with a charging hole 120.
  • the charging connector can be plugged into the charging module through the charging hole 120 to form a charging state.
  • the support tube 112 defines a heating cavity 1121 for accommodating the aerosol generation product 18, which is used in conjunction with the aerosol generation device 1.
  • a planar microwave antenna 111 is constructed as a thin sheet or film structure and is arranged around the outer surface of the support tube 112. The planar microwave antenna 111 emits radio frequency energy when energized and conducts it to the heating cavity 1121, thereby heating the aerosol-forming matrix in the aerosol generation product within the heating cavity 1121 to generate aerosols. It is understood that different matrix materials within the aerosol generation product 18 can absorb microwave radio frequency energy to varying degrees, and the matrix materials couple with the microwave electromagnetic field to achieve energy conversion.
  • the process of microwave electromagnetic field energy conversion includes, but is not limited to, ion conduction, dipole rotation, interface polarization, etc.
  • the aerosol forming matrix absorbs microwave electromagnetic field energy and converts it into heat through ion conduction, dipole rotation, etc., so that it heats up as a whole to generate aerosols.
  • the heating method of this application does not rely on heat transfer and convection radiation, which reduces the temperature gradient in the aerosol forming matrix during the heating process. It has the advantages of fast heating speed and high temperature uniformity.
  • the support tube 112 in this embodiment can be a cylindrical structure made of non-metallic materials such as quartz, ceramic or plastic to avoid the metal reflecting the microwaves emitted by the planar microwave antenna 111, thereby ensuring the return loss index.
  • the planar microwave antenna 111 is flexible and rollable.
  • the planar 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 planar microwave antenna 111 can be a flexible printed circuit board (FPC).
  • the planar microwave antenna 111 can be a nickel silver sheet. Both the FPC and the nickel silver sheet are flexible, thus the planar microwave antenna 111 can be bent, allowing it to wrap around and conform to the support tube 112.
  • the heating assembly 11 also includes a positioning component for holding the FPC or nickel silver sheet on the outer surface of the support tube without displacement. Commonly used positioning components include heat shrink tubing and high-temperature resistant tape.
  • the planar microwave antenna 111 is rolled up and mounted and fixed to the outer surface of the support tube 112, such as an FPC antenna.
  • the conductor material of the planar microwave antenna 111 is integrated onto the support tube 112.
  • the planar microwave antenna 111 includes a film structure of conductor material, the film structure having a specific pattern shape (see Figure 6), and the film structure can be bonded and integrated onto the outer surface of the support tube 112 by means of methods not limited to printing, spraying, etching, or vapor deposition.
  • the planar microwave antenna 111 is Z-shaped or F-shaped and is constructed as a ring around the periphery of the support tube 112.
  • the planar microwave antenna 111 can be a planar inverted-F antenna (PIFA), which is advantageous for reducing the size of the heating component.
  • PIFA planar inverted-F antenna
  • the width and height of the planar microwave antenna 111 after unfolding are matched with the outer diameter and longitudinal length of the support tube 112.
  • the circumferential width of the planar microwave antenna 111 is smaller than the circumference of the support tube 112, thereby ensuring that the planar microwave antenna 111 can be just attached to the surface of the support tube 112.
  • the two sides of the planar microwave antenna 111 along the width direction will not overlap when the planar microwave antenna 111 is arranged around the outer wall of the support tube 112, avoiding the overlapping part from affecting the radiation efficiency of the planar microwave antenna 111.
  • the planar microwave antenna 111 can basically cover or partially cover the longitudinal length of the support tube 112.
  • the height of the planar microwave antenna 111 is matched with the length of the aerosol generating matrix section (e.g., the smoke-generating part 182) in the aerosol generating article 18, so that the radiation area of the antenna can effectively cover the matrix material.
  • the planar microwave antenna 111 in the form of a ring is helpful to improve heating efficiency.
  • the height of the planar microwave antenna 111 along the longitudinal direction of the support tube 112 is 15mm-19mm, and the width of the planar microwave antenna 111 after being unfolded in the circumferential direction is 20mm-29mm.
  • the tubular antenna formed by the roll has a suitable inner diameter, so that the axial center of the aerosol generating matrix in the heating cavity 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 generating matrix.
  • the planar microwave antenna 111 is provided with a first through slot 1111 and a second through slot 1112 that extend 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 planar 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 planar microwave antenna 111 along the length direction overlap when the planar microwave antenna 111 surrounds the outer wall of the support tube 112, the overlapping portion will affect the return loss of the planar microwave antenna 111, resulting in a serious reduction in the energy transmission efficiency of the radio frequency radiation. Therefore, as shown in FIG5, the first side 1115 and second side 1116 of the planar microwave antenna 111 in this embodiment do not overlap and have a gap, ensuring that the planar microwave antenna 111 has a high energy transmission efficiency.
  • the planar microwave antenna 111 includes a first portion 1117, a second portion 1118, and a third portion 1119 separated by a first through slot 1115 and a second through slot 1116.
  • the dimensions of the first portion 1117, the second portion 1118, and the third portion 1119 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 planar 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 planar 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 planar 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 planar microwave antenna 111 is strongest near the first through slot 1111.
  • the electric field strength and magnetic field strength of the planar microwave antenna 111 near the first through slot 1111 are the highest.
  • the first through slot 1111 is opened approximately at the middle of the longitudinal height of the planar microwave antenna 111 (see FIG6).
  • 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 generating device 1 to be positioned longitudinally at the center of the aerosol generating matrix (smoke-generating part 182) when the aerosol generating product 18 is inserted into the heating chamber 1121 during use. This maximizes the absorption of radio frequency energy and improves the heating rate of the aerosol generating 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 planar microwave antenna 111 includes a ground terminal 1113 and a feed terminal 1114. Both the ground terminal 1113 and the feed terminal 1114 are located on a first side 1115, or both are located on a second side 1116. That is, the ground terminal 1113 and the feed terminal 1114 are located on the same side of the planar microwave antenna 111. Referring to FIG10, when both the ground terminal 1113 and the feed terminal 1114 are located on the first side 1115, the gap region between the first side 1115 and the second side 1116 also has a high electric field strength.
  • the cover 13 is provided with an insertion port 130, which is connected to the heating chamber 1121.
  • a portion of the aerosol generating product 18 is inserted into the heating chamber 1121 through the insertion port 130, so that the aerosol generating product 18 can be heated by the planar microwave antenna 111 inside the aerosol generating device 1.
  • the aerosol generating article 18 includes a filter part 181 and a smoke generating part 182. After the smoke generating part 182 of the aerosol generating article 18 is inserted into the heating chamber 1121, since the first through groove 1111 corresponds to the middle position of the smoke generating part 182 of the aerosol generating article 18, the middle position of the inserted smoke generating part 182 receives the highest heat and transfers it to both ends of the smoke generating part 182, resulting in the highest energy transfer efficiency and the best heating effect on the aerosol generating article 18.
  • the aerosol generating device 1 also includes a radio frequency (RF) cable, which is welded to the planar microwave antenna 111. Therefore, the positive and negative terminals of the RF cable are respectively welded to the grounding terminal 1113 and the feed terminal 1114 to achieve electrical connection between the RF cable and the planar microwave antenna 111.
  • the RF cable is used to connect the planar microwave antenna 111 to the circuit board 16.
  • the welding method can be soldering or laser welding.
  • the grounding terminal 1113 and the feeding terminal 1114 are located on opposite sides of the opening of the first through slot 1111, and the highest energy radiation area of the planar microwave antenna 111 is concentrated between the grounding terminal 1113 and the feeding terminal 1114 in the region of the first through slot 1111.
  • the positions of the grounding terminal 1113 and the feeding terminal 1114 can be offset and adjusted along the first through slot 1111 as needed.
  • the planar design shape of the planar microwave antenna 111, the height of the first through slot 1111, and the length of the first through slot 1111 can all be adjusted to optimize the return loss index of the planar microwave antenna 111.
  • the middle position of the smoke-generating part 182 of the aerosol generating product 18 corresponds to the point of highest energy of the planar microwave antenna 111, the energy transmission efficiency is the highest, and the heating effect on the aerosol generating product 18 is the best.
  • the heating assembly 11 further includes a temperature sensor, which is attached to the outer surface of the support tube 112.
  • the temperature sensor may be located at the middle position of the planar microwave antenna 111 in the longitudinal direction; or the temperature sensor is integrated on the planar microwave antenna 111 and has an electrode connection terminal, such as a pad, for outputting a temperature signal.
  • the electrode connection terminal may be close to the ground terminal 1113 and the feed terminal 1114 of the planar microwave antenna 111.
  • the aerosol generating apparatus 1 includes a planar microwave antenna 111 surrounding the outer wall of a support tube 112.
  • the planar microwave antenna 111 is electrically connected to a circuit board 16, which integrates a microwave generating circuit and a controller.
  • the controller is connected to the microwave generating circuit.
  • the controller controls the microwave generating circuit to supply microwaves of the optimal operating frequency to the planar microwave antenna 111.
  • the planar microwave antenna 111 emits microwaves, which radiate to the smoke-generating part 182 of the aerosol generating product 18, causing it to heat up through its own dielectric loss and generate aerosol.
  • this application uses a planar microwave antenna 111, which is disposed on the outer surface of the support tube 112, reducing the complexity and cost of the product structure. Furthermore, since the planar microwave antenna 111 is a planar wire or strip wire with a certain width, compared with the traditional linear spiral antenna, the planar microwave antenna 111 in this application can cover most of the outer surface of the support tube 112, thereby providing a larger area of radiation projection in the heating cavity 1121, which is beneficial to improving the microwave heating efficiency of the heating component.
  • 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 61.
  • 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 planar microwave antenna 111.
  • the microwaves output by the integrated chip are fed into the planar microwave antenna 111 through the first and second terminals of the circulator.
  • the aerosol generating matrix in the heating cavity 1121 is heated and releases aerosols under the action of microwaves.
  • the second terminal of the circulator can also receive the microwave signal fed back from the planar 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 end of the circulator.
  • the second end of the circulator outputs a radio frequency signal to the planar microwave antenna 111. Since the frequency of the planar microwave antenna 111 will be offset, the planar microwave antenna 111 operates within the offset bandwidth. The return loss of the planar microwave antenna 111 is different at different frequencies. Therefore, some radio frequency signals will be reflected to the third end 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 unipolar gallium nitride RF power amplifier on a single substrate.
  • the microstrip matching of the gate, drain, and feedback network external to the above integrated chip occupies very little space, which is beneficial for the miniaturization of aerosol generation device products.
  • the power of the unipolar gallium nitride RF power amplifier can also be selected as 20-25W, 25-30W, 30-35W, or 35-40W.
  • the integrated chip is a GTAH25030C6 chip manufactured by Innogration Technologies.
  • the oscillation circuit of the integrated chip is an integrated voltage-controlled oscillator (VCO) and an attenuator (ATT), which can adjust the output power.
  • VCO voltage-controlled oscillator
  • ATT attenuator
  • the output power passes sequentially through an integrated first-stage power amplifier, a driver-stage power amplifier, and a final-stage power amplifier; or as shown in Figure 9, the output power passes sequentially 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 (RF) 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.
  • RF radio frequency
  • 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 planar 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 planar microwave antenna 111.
  • the microstrip includes a forward output microstrip and a reflective microstrip.
  • the two ends of the forward output microstrip are respectively connected to the output terminal of the integrated chip and a PI-type attenuator.
  • the two ends of the reflective microstrip are respectively connected to the load and a power detector.
  • the forward output microstrip and the reflective microstrip are coupled with a certain degree of coupling.
  • the power of the forward output terminal and the reflective terminal are coupled by the microstrip.
  • the sampling pin MCU_AD1 of the controller collects the voltage value V_coupled at the output terminal through the PI-type attenuator, and the sampling pin MCU_AD2 collects the voltage value V_reflected at the reflective terminal through the power detector.
  • the magnitude of the power at the forward output terminal and the power at the reflective terminal can be calculated.
  • the return loss value of the planar microwave antenna 111 can be calculated by the ratio of the power at the forward output terminal to the power at the reflective terminal.
  • 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.
  • 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 planar microwave antenna 111.
  • the third terminal receives the microwave energy reflected back from the planar microwave antenna 111 and transfers it to the load.
  • some heat from the heating components is transferred to the microwave generating circuit.
  • the output frequency of the integrated chip increases or decreases, with a maximum not exceeding 2460MHz and a minimum not less than 2430MHz. Therefore, the optimal return loss for the planar microwave antenna 111 must cover these frequency ranges.
  • the power transmission efficiency of the planar microwave antenna 111 is greater than 90%; when the return loss is greater than or equal to 13.7, the power transmission efficiency of the planar 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 the planar microwave antenna 111 is greater than 98.5%.
  • the heating frequency of the planar microwave antenna 111 is 2430MHz-2460MHz.
  • the return loss of the planar microwave antenna 111 is greater than or equal to 10
  • the transmission efficiency of the planar microwave antenna 111 is greater than 90%
  • the heating effect on the aerosol-generated product 18 is better.
  • the existing integrated chip's output terminal lacks a circulator and is directly connected to the planar microwave antenna 111.
  • this embodiment adds a circulator to the integrated chip's output terminal, allowing the reflected microwaves from the planar 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 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 11 to start working.
  • the aerosol generating device 1 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 1.
  • 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.

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Abstract

本申请涉及电子雾化技术领域，具体涉及一种气溶胶生成装置和加热组件，该加热组件包括：支撑管，限定有用于容纳包括有气溶胶形成基质的气溶胶生成制品的至少一部分的加热腔；面状微波天线，构造成薄片形或者膜层结构并且环绕设置于支撑管的外表面，面状微波天线用于在通电时发射射频能量并且传导至加热腔，从而对加热腔内的气溶胶生成制品中的气溶胶形成基质进行加热以产生气溶胶。相较于现有的微波天线线圈通过缠绕或电镀蚀刻在支撑管表面，本申请的面状微波天线有利于提高加热效率，以及降低了产品结构的复杂度与成本。

Description

气溶胶生成装置和加热组件
相关申请的交叉引用参考
本申请要求于2024年06月14日提交中国专利局，申请号为202410774116.4，名称为“气溶胶生成装置和加热组件”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
本申请涉及电子雾化技术领域，具体涉及一种气溶胶生成装置和加热组件。
背景技术
气溶胶生成装置通过高温加热到气溶胶生成制品可以产生气溶胶但是却不足以燃烧的温度，能在不燃烧的前提下，让气溶胶生成制品中的气溶胶形成基质产生用户所需要的气溶胶。
作为一种现有技术的示例，气溶胶生成装置在支撑管的外表面设置螺旋形式的微波天线线圈，线圈在通电情况下能够发射电磁波从而形成微波电磁场，在微波电磁场和气溶胶形成基质的耦合共同作用下将微波能量迅速转化为加热气溶胶产生基质的热量，但是采用此类螺旋线圈形式的微波天线作为辐射源，气溶胶生成装置的加热效率以及能量利用率较低，从而影响加热组件的升温速度以及气溶胶生成装置的续航；此外，微波天线线圈需要缠绕或电镀蚀刻在支撑管表面，增加了产品结构的复杂度和成本。
申请内容
针对现有技术的不足，本发明提供了一种气溶胶生成装置及其用于加热气溶胶生成制品的加热组件，旨在解决螺旋线圈形微波天线的加热效率比较低以及增加了产品结构的复杂度和成本的问题。
为实现上述目的，本发明采用如下技术方案：
本申请的实施例之一提供一种用于加热气溶胶生成制品的加热组件，包括：
支撑管，限定有用于容纳包括有气溶胶形成基质的气溶胶生成制品的至少一部分的加热腔；面状微波天线，所述面状微波天线构造成薄片形或者膜层结构并且环绕设置于所述支撑管的外表面，所述面状微波天线用于在通电时发射射频能量并且传导至所述加热腔，从而对所述加热腔内的所述气溶胶生成制品中的所述气溶胶形成基质进行加热以产生气溶胶。
本申请的实施例之一提供一种加热组件，所述面状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。
本申请的实施例之一提供一种加热组件，所述面状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。
本申请的实施例之一提供一种加热组件，所述面状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。
本申请的实施例之一提供一种加热组件，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。
本申请的实施例之一提供一种加热组件，所述面状微波天线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。
本申请的实施例之一提供一种加热组件，所述第一通槽的宽度大于所述第二通槽的宽度。
本申请的实施例之一提供一种加热组件，其特征在于，所述面状微波天线呈Z形或F形。
本申请的实施例之一提供一种加热组件，所述面状微波天线包括接地端和馈电端，所述接地端和所述馈电端相对应地位于所述第一通槽的开口两侧。
本申请的实施例之一提供一种加热组件，所述面状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。
本申请的实施例之一提供一种加热组件，其特征在于，所述面状微波天线沿所述支撑管纵向的高度为15mm-19mm，或者所述面状微波天线沿周向展开后的宽度为20mm-29mm。
本申请的实施例之一提供一种加热组件，其特征在于，所述支撑管为石英、陶瓷或塑料制成的筒状结构。
本申请的实施例之一提供一种加热组件，所述面状微波天线包括柔性线路板，或所述面状微波天线的导体材料包括洋白铜。
本申请的实施例之一提供一种加热组件，所述面状微波天线的射频能量的传输效率大于90％，或者所述面状微波天线的回波损耗大于10。
本申请的实施例之一提供一种加热组件，所述面状微波天线的加热频率为2430MHz-2460MHz。
本申请的实施例之一提供一种加热组件，所述面状微波天线被贴装于所述支撑管的外侧表面，或者所述面状微波天线的导体材料集成于所述支撑管上。
本申请的实施例之一提供一种气溶胶生成装置，包括电池组件和以上任一实施例提供的加热组件，所述电池组件向所述加热组件提供电能。
以上实施例所阐述的一种气溶胶生成装置及其用于加热气溶胶生成制品的加热组件，其有益效果在于：本申请涉及的加热组件使用面状微波天线，将面状微波天线设置于支撑管的外表面，从而使得面状微波天线能够环绕加热腔，相较于螺旋式线状天线具有较大面积的辐射源，面状微波天线将射频能量径向传导至加热腔内，对加热腔内的气溶胶生成制品进行辐射加热，相较于现有的微波天线线圈通过缠绕或电镀蚀刻在支撑管表面，提高了微波天线的加热效率；另一方面，环绕设置在支撑管外表面的面状微波天线具有很小的厚度，对于减小加热组件的体积以及气溶胶生成装置的小型化是有利的。此外，本申请加热组件中的面状微波天线可以采用卷绕贴装的方式结合于支撑管上，降低了产品结构的复杂度与组装成本。
附图说明
图1是本发明实施例的气溶胶生成装置的一个视角的立体示意图；
图2是本发明实施例的气溶胶生成装置的另一个视角的立体示意图；
图3是本发明实施例的气溶胶生成装置的内部结构示意图；
图4是本发明实施例的气溶胶生成装置的剖视图；
图5是本发明实施例的加热组件的装配图；
图6是本发明实施例的面状微波天线的展开示意图；
图7是本发明实施例的微波发生电路的信号传输示意图；
图8是图7的微波发生电路的信号传输示意图之一；
图9是图7的微波发生电路的信号传输示意图之二；
图10是本发明实施例的面状微波天线的电场模拟图；
图11是本发明实施例的面状微波天线的磁场模拟图。
附图标记说明：
1、气溶胶生成装置；11、加热组件；111、面状微波天线；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；1117、第一部分；1118、第二部分；1119、第三部分；112、支撑管；1121、加热腔；113、隔热件；12、壳体；120、充电孔；121、第一腔体；122、第二腔体；123、第三腔体；13、壳盖；130、插入口；14、支架；15、电源单元；16、电路板；17、控制按键；18、气溶胶生成制品；181、滤嘴部；182、发烟部。
具体实施方式
下面结合附图与具体实施例来对本发明作进一步描述。
请参照图1，本申请的一实施例提供了一种气溶胶生成装置1，该装置可用于加热气溶胶生成制品18，使气溶胶生成制品18挥发出气溶胶来，以供用户吸食。
如本文所使用，术语“气溶胶生成制品18”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18可移除连接到气溶胶生成装置1。
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18”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18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18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1”是与气溶胶生成制品18接合或交互以加热或汽化气溶胶生成制品18内的基质材料形成可吸入气溶胶的装置。
气溶胶生成装置1包括加热组件11，加热组件11用于加热气溶胶生成制品18的气溶胶形成基质以生成气溶胶。
如图1至图4所示，本申请一实施例提供了一种气溶胶生成装置1，气溶胶生成装置1包括壳体12与壳盖13，壳盖13盖设于壳体12形成腔体，气溶胶生成装置1还包括容纳于腔体内的加热组件11、支架14、电源单元15和电路板16；其中，加热组件11包括面状微波天线111与支撑管112。
支架14安装固定在壳体12，加热组件11、电源单元15及电路板16安装在支架14上。
如图3与图4所示，支架14将壳体12的内部分成第一腔体121与第二腔体122，电路板16安装在第一腔体121，电源单元15安装在第二腔体122。此外，支架14与壳盖13形成第三腔体123，加热组件11安装在第三腔体123。
如图3与图4所示，在一些实施例中，加热组件11还包括隔热件113，隔热件113安装在支架14，支撑管112固定在隔热件113内部，隔热件113能够限制热量向壳体12沿径向传递，从而能够提高加热组件11的加热效率，同时避免热量传递到壳体12影响用户的体验。
隔热件113优选地采用具有隔热性能良好的塑胶材料，合适的材料可以是PEEK。PEEK(聚醚醚酮)是一种高性能热塑性塑料，具有高强度且具有耐高温性、易于加工、具有高耐磨性和耐化学性，在高温环境中表现良好。或者隔热件113也可以构造成真空管的形式，真空管由于其内部呈现真空状态，而由于真空具有隔热作用，故加热组件11的热量可被该真空管进行隔离，从而使得加热组件11的热量无法传递给壳体12。或者隔热件113是采用气凝胶覆盖或包围在支撑管112外周，从而提供绝热。在一些示例性实施例中，隔热件113环绕在面状微波天线111外围，从而使面状微波天线111弯曲并保持为非闭合的环形，隔热件113还能够提供支撑从而使得面状微波天线111能够保持在支撑管112上的特定位置而无法移动。
电源单元15用于给电路板16上的工作电路供电，电路板16上的工作电路用于控制面状微波天线111开始或停止工作以及输出微波频率的大小。在一些实施例中，电路板16还连接有控制按键17，控制按键17穿过壳盖13的按键孔暴露在壳盖13外，从而用户可以通过控制按键17控制面状微波天线111开始或停止工作。
在本申请的一个实施例中，电源单元15包括可充电或者不可充电的电芯，在一些实施例中，电源是锂离子电池。或者，电源可为镍金属氢化物电池、镍镉电池或锂基电池，例如锂钴、磷酸锂铁、钛酸锂或锂聚合物电池。
在本申请的一个实施例中，电源单元15为可充电电芯，因此电路板16还设置有充电模块，壳体12设置有充电孔120，充电连接器可以通过充电孔120与充电模块插接形成充电状态。
支撑管112限定有容纳气溶胶生成制品的加热腔1121，加热腔1121用于收容与气溶胶生成装置1配套使用的气溶胶生成制品18，面状微波天线111构造成薄片形或者膜层结构并且环绕设置于支撑管112的外表面，面状微波天线111用于在通电时发射射频能量并且传导至加热腔1121，从而对加热腔1121内的气溶胶生成制品中的气溶胶形成基质进行加热以产生气溶胶。可以理解的是，气溶胶生成制品18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。
在本申请的一个实施例中，因为面状微波天线111是发射微波对气溶胶生成制品18进行加热，而微波照射到金属表面会全部反射，影响回波损耗，因此，本实施例的支撑管112可以是石英、陶瓷或塑料等非金属材质制成的筒状结构，避免金属对面状微波天线111发射的微波进行反射，从而保证回波损耗指标。
在一些实施例中，面状微波天线111是柔性可卷曲的，面状微波天线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，例如合适的面状微波天线111可以是柔性线路板(FPC)。或者在另一些示例中，面状微波天线111可以是洋白铜片材，FPC与洋白铜片材材质柔软，因此面状微波天线111能够进行弯曲，使面状微波天线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11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外表面而不产生位移，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，面状微波天线111卷曲后被贴装且固定于支撑管112的外侧表面，例如FPC天线。在另一些可替代的实施例中，面状微波天线111的导体材料集成于支撑管112上。例如，面状微波天线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6)，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112外表面。
在一些实施例中，面状微波天线111的形状呈Z形或者F形，并且环绕在上述支撑管112外围构造成环带状。作为可选示例，上述面状微波天线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的体积是有利的。
如图5与图6所示，面状微波天线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，在本实施例中面状微波天线111周向宽度小于支撑管112的周长，从而能够确保面状微波天线111能够刚好贴装在支撑管112的表面，同时面状微波天线111沿宽度方向的两侧边在面状微波天线111围绕设置在支撑管112的外壁时不会重叠，避免重叠部分影响面状微波天线111的辐射效率。在高度方向上，面状微波天线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，面状微波天线111的高度是与气溶胶生成制品18内的气溶胶生成基质段的长度(例如发烟部182)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。
可以预见的是，呈环绕形式的面状微波天线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，面状微波天线111沿支撑管112纵向的高度为15mm-19mm，面状微波天线111沿周向展开后的宽度为为20mm-29mm，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。
如图6所示，在本申请的一个实施例中，面状微波天线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。在本申请的可选的一个实施例中，第一通槽1111的宽度L6大于第二通槽1112的宽度L7。
在本申请的一个实施例中，面状微波天线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。因为面状微波天线111沿长度方向的两侧边在面状微波天线111围绕设置在支撑管112的外壁时产生重叠，重叠部分会影响面状微波天线111回波损耗，导致射频辐射出去的能量传输效率受到严重降低。因此如图5所示，本实施例的面状微波天线111的第一侧边1115和第二侧边1116不重叠并且具有间隙，保证面状微波天线111具有较高的能量传输效率。
在本申请的一个实施例中，面状微波天线111包括由第一通槽1115和第二通槽1116分隔的第一部分1117、第二部分1118和第三部分1119，第一部分1117、第二部分1118和第三部分1119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，面状微波天线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，面状微波天线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，如图6所示，面状微波天线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，面状微波天线111在第一通槽1111附近的电磁波辐射最强。例如参见图10所示的加热组件在通电时的电场分布图以及图11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，面状微波天线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大致上开设于面状微波天线111的纵向高度的中间位置(参见图6)。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1在使用过程中，当气溶胶生成制品18插入加热腔1121时，第一通槽1111能够沿纵向基本对准气溶胶生成基质(发烟部182)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，面状微波天线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均位于面状微波天线111的同一个侧边。参考图10所示，当接地端1113和馈电端1114均位于第一侧边1115时，第一侧边1115与第二侧边1116之间的间隙区域也具有较高的电场强度。
参见图4，壳盖13设置有一插入口130，插入口130与加热腔1121导通，气溶胶生成制品18的局部通过插入口130插入加热腔1121，并使得气溶胶生成制品18在气溶胶生成装置1内部能够被面状微波天线111加热。
气溶胶生成制品18包括滤嘴部181和发烟部182，在气溶胶生成制品18的发烟部182插入加热腔1121后，由于第一通槽1111对应于气溶胶生成制品18的发烟部182的中间位置，因此插入的气溶胶生成制品18的发烟部182的中间位置受到的热量最高，并且向发烟部182的两端传递，能量的传输效率最高，对气溶胶生成制品18的加热效果最好。
需要说明的是，气溶胶生成装置1还包括：射频电缆，射频电缆与面状微波天线111焊接，因此，射频电缆的正极与负极分别焊接接地端1113和馈电端1114，实现射频电缆与面状微波天线111的电连接，射频电缆用于连接面状微波天线111与电路板16。焊接方式可以是锡焊或者激光焊接方式。
在本申请的一个实施例中，接地端1113和馈电端1114分别位于第一通槽1111的开口两侧，面状微波天线111加热的最高能量辐射区域集中在第一通槽1111区域的接地端1113与馈电端1114之间。接地端1113与馈电端1114的位置可以针对需求沿第一通槽1111进行偏移调整。
受整个气溶胶生成装置1材料介质的影响，面状微波天线111的平面设计形状、第一通槽1111位置的高度与第一通槽1111的长度尺寸都可以被调整来优化面状微波天线111的回波损耗指标，当气溶胶生成制品18的发烟部182的中间位置对应于面状微波天线111能量最高处时，能量传输效率最高，对气溶胶生成制品18的加热效果最好。
在一些实施例中，加热组件11还包括温度传感器，温度传感器被贴装在支撑管112外侧表面，温度传感器可以位于面状微波天线111在纵向上的中间位置；或者温度传感器被集成在面状微波天线111上，并且具有输出温度信号的电极连接端例如焊盘，电极连接端可以靠近面状微波天线111的接地端1113和馈电端1114。
在一些实施例中，气溶胶生成装置1包括围绕设置在支撑管112外壁上的面状微波天线111，面状微波天线111与电路板16电连接，电路板16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。在使用过程中，控制器控制微波发生电路向面状微波天线111中通入最佳工作频率的微波，面状微波天线111发射微波，通过微波辐射气溶胶生成制品18的发烟部182，使其通过自身介电损耗发热升温产生气溶胶。相较于现有的螺旋形式的微波天线线圈缠绕或电镀蚀刻在支撑管112表面的方案，本申请使用面状微波天线111，将面状微波天线111设置于支撑管112的外表面，降低了产品结构的复杂度与成本。此外，由于面状微波天线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，本申请中的面状微波天线111能够覆盖上述支撑管112的绝大部分外侧表面，从而在加热腔1121内提供较大面积的辐射投影，这有利于提高加热组件的微波加热效率。
如图7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61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面状微波天线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面状微波天线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面状微波天线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面状微波天线111，由于面状微波天线111的频率会有偏移，面状微波天线111工作在偏移的宽带内，面状微波天线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。在本申请的一个实施例中，集成芯片选用远创达(Innogration Technologies)生产的型号为GTAH25030C6的芯片。
如图8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与衰减器ATT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9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7、图8或图9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面状微波天线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面状微波天线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，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面状微波天线111的回波损耗值。
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18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。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面状微波天线111，通过第三端接收面状微波天线111反射回来的微波能量并转移给负载。在气溶胶生成装置的工作过程中，加热组件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。因此面状微波天线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，则面状微波天线111的功率传输效率大于90％；当回波损耗大于等于13.7，则面状微波天线111的功率传输效率大于95.7％；当回波损耗大于等于18.2，则面状微波天线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，面状微波天线111的加热频率为2430MHz-2460MHz，在这一频段中面状微波天线111的回波损耗大于等于10，面状微波天线111的传输效率大于90％，对气溶胶生成制品18的加热效果较佳。
现有的集成芯片的输出端未设置环形器，直接连接面状微波天线111，当面状微波天线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，使面状微波天线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1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18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1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1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11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1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1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1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。
以上所述，仅是本发明较佳实施例而已，并非对本发明的技术范围作任何限制，故凡是依据本发明的技术实质对以上实施例所作的任何细微修改、等同变化与修饰，均仍属于本发明技术方案的范围内。

Claims (17)

  1. 一种加热组件，其特征在于，包括：
    支撑管，限定有用于容纳包括有气溶胶形成基质的气溶胶生成制品的至少一部分的加热腔；
    面状微波天线，所述面状微波天线构造成薄片形或者膜层结构并且至少部分环绕设置于所述支撑管的外表面，所述面状微波天线用于在通电时发射射频能量并且传导至所述加热腔，从而对所述加热腔内的所述气溶胶生成制品中的所述气溶胶形成基质进行加热以产生气溶胶。
  2. 根据权利要求1所述的加热组件，其特征在于，所述面状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。
  3. 根据权利要求2所述的加热组件，其特征在于，所述面状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，并且所述第一通槽与所述第二侧边存在间距。
  4. 根据权利要求3所述的加热组件，其特征在于，所述面状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，所述第二通槽与所述第一侧边存在间距，并且所述第二通槽与所述第一通槽在纵向上错开。
  5. 根据权利要求4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。
  6. 根据权利要求2所述的加热组件，其特征在于，所述面状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。
  7. 根据权利要求1所述的加热组件，其特征在于，所述面状微波天线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。
  8. 根据权利要求6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。
  9. 根据权利要求7或8所述的加热组件，其特征在于，所述面状微波天线包括接地端和馈电端，所述接地端和所述馈电端相对应地位于所述第一通槽的开口两侧。
  10. 根据权利要求1所述的加热组件，其特征在于，所述面状微波天线呈Z形或F形。
  11. 根据权利要求1所述的加热组件，其特征在于，所述面状微波天线沿所述支撑管纵向的高度为15mm-19mm，或者所述面状微波天线沿周向展开后的宽度为20mm-29mm。
  12. 根据权利要求1所述的加热组件，其特征在于，所述支撑管为石英、陶瓷或塑料制成的筒状结构。
  13. 根据权利要求1所述的加热组件，其特征在于，所述面状微波天线包括柔性线路板，或所述面状微波天线的导体材料包括洋白铜。
  14. 根据权利要求1所述的加热组件，其特征在于，所述面状微波天线的射频能量的传输效率大于90％，或者所述面状微波天线的回波损耗大于10。
  15. 根据权利要求1所述的加热组件，其特征在于，所述面状微波天线的加热频率为2430MHz-2460MHz。
  16. 根据权利要求1所述的加热组件，其特征在于，所述面状微波天线被贴装于所述支撑管的外侧表面，或者所述面状微波天线的导体材料集成于所述支撑管上。
  17. 一种气溶胶生成装置，包括电池组件和权利要求1-16中任一项所述的加热组件，所述电池组件向所述加热组件提供电能。
PCT/CN2025/097236 2024-06-14 2025-05-26 气溶胶生成装置和加热组件 Pending WO2025256397A1 (zh)

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