WO2024031982A1 - Dispositif de chauffage à micro-ondes et dispositif de génération d'aérosol - Google Patents

Dispositif de chauffage à micro-ondes et dispositif de génération d'aérosol Download PDF

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Publication number
WO2024031982A1
WO2024031982A1 PCT/CN2023/080903 CN2023080903W WO2024031982A1 WO 2024031982 A1 WO2024031982 A1 WO 2024031982A1 CN 2023080903 W CN2023080903 W CN 2023080903W WO 2024031982 A1 WO2024031982 A1 WO 2024031982A1
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WO
WIPO (PCT)
Prior art keywords
conductor
inner conductor
microwave heater
heater according
barrel
Prior art date
Application number
PCT/CN2023/080903
Other languages
English (en)
Chinese (zh)
Inventor
杜靖
梁峰
胡昌河
Original Assignee
深圳麦时科技有限公司
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Application filed by 深圳麦时科技有限公司 filed Critical 深圳麦时科技有限公司
Publication of WO2024031982A1 publication Critical patent/WO2024031982A1/fr

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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

Definitions

  • the present invention relates to the field of electronic atomization, and in particular to a microwave heater and an aerosol generating device.
  • an aerosol generating device in order to form a resonant cavity, needs to design an inner conductor barrel.
  • the medium is generally located above the inner conductor barrel. Since the inner conductor barrel occupies a certain height, the height of the cavity cannot be reduced to the same level as the medium. The height is close; at the same time, the microwave feed device is set on the side of the cavity near the bottom; these structural designs make the size of the circuit board more restricted when designing miniaturized appliances, making it difficult to design smaller microwave heating appliances.
  • the technical problem to be solved by the present invention is to provide an improved microwave heater and aerosol generating device.
  • the technical solution adopted by the present invention to solve the technical problem is to construct a microwave heater for use in an aerosol generating device, including:
  • the outer conductor unit is cylindrical and has a first open end and a closed end;
  • the probe device is in a longitudinal shape, one end of which is fixed on the closed end and ohmically connected to the closed end, and the other end extends toward the first open end;
  • the inner conductor unit includes a cylindrical inner conductor barrel, which is arranged in the conductor unit along the axial direction and surrounds the probe device;
  • a gap is formed between the outer wall surface of the inner conductor barrel and the inner wall surface of the outer conductor unit, and between the inner wall surface of the inner conductor barrel and the outer wall surface of the probe device.
  • the inner conductor barrel includes a second open end and a third open end opposite to the second open end; the second open end is mounted on the first open end and connected with the first open end. end ohmic contact; the third open end extends toward the closed section.
  • the axial height of the inner conductor barrel is slightly smaller than the axial height of the inner cavity of the outer conductor unit.
  • the inner conductor barrel and/or the outer conductor unit are both cylindrical.
  • the outer conductor unit includes an inner end surface located at the closed end and relative to the first open end;
  • the inner end surface is configured to contact the substrate end surface of the aerosol-generating substrate; and when the substrate end surface and the inner end surface abut, an air inlet gap is formed between the substrate end surface and the inner end surface.
  • the inner end surface includes at least one protruding portion protruding toward the first open end, and the inner end surface forms the air inlet gap with the substrate end surface via the at least one protruding portion.
  • the inner end surface includes at least one groove that is concave toward the closed end, and the inner end surface forms the air inlet gap with the substrate end surface through the at least one groove.
  • the at least one protruding portion partially coincides with the projection of the substrate end surface on the inner end surface; or the at least one protruding portion is included in the projection of the matrix end surface on the inner end surface. middle.
  • the at least one groove coincides with the projected portion of the substrate end surface on the inner end surface respectively.
  • the inner conductor unit further includes at least one conductor disk sleeved on the outer periphery of the inner conductor barrel; the outer diameter of the conductor disk is larger than the outer diameter of the inner conductor barrel and smaller than the outer diameter of the outer conductor unit. the inside diameter of;
  • the at least one conductor disk is integrally combined with the inner conductor barrel, or the at least one conductor disk is in ohmic contact with the inner conductor barrel.
  • said at least one conductor disk is disposed adjacent said closed end.
  • the inner conductor unit further includes a fixing bracket sleeved on the peripheral wall of the inner conductor barrel; the outer diameter of the fixing bracket is larger than the outer diameter of the outer conductor unit, and is erected on the first opening. end.
  • the inner conductor unit further includes a first lug extending outward along the peripheral wall of the fixing frame.
  • the inner conductor unit further includes a second lug extending outward along the peripheral wall of the fixing frame.
  • the outer conductor unit includes an outer conductor barrel and at least one assembly seat extending outward from the outer conductor barrel; the assembly seat is provided with an assembly hole for mechanical cooperation with the first lug;
  • the number of the first lugs corresponds to the number of the assembly seats.
  • the outer conductor unit includes an outer conductor barrel and a positioning base extending outward from the outer conductor barrel; the positioning base is provided with a protruding point for the second lug to be sleeved.
  • the probe device includes a longitudinal probe; the bottom end of the probe is embedded in the closed end, and the top end of the probe extends toward the first open end.
  • the top shape of the probe includes a plane, a sphere, an ellipsoid, a cone or a truncated cone.
  • the top end of the probe extends at most flush with the first open end.
  • it also includes a microwave feed device connected to the microwave heater, one end of the microwave feed device is inserted into the outer conductor unit from the outer peripheral wall of the outer conductor unit, and is connected with the inner conductor barrel ohmic contact.
  • the microwave feeding device is disposed adjacent to the first open end.
  • the microwave feeding device includes an inner conductor, an outer conductor and a dielectric layer between the inner conductor and the outer conductor.
  • the inner conductor is in a straight shape and extends along a direction perpendicular to the inner conductor.
  • the axis of the conductor barrel is in ohmic contact with the inner conductor.
  • the inner conductor unit further includes a fixing bracket sleeved on the peripheral wall of the inner conductor barrel; the outer diameter of the fixing bracket is larger than the outer diameter of the outer conductor unit, and is erected on the first opening. end;
  • the microwave feeding device includes an inner conductor, an outer conductor and a dielectric layer between the inner conductor and the outer conductor.
  • the inner conductor includes a first section perpendicular to the axis of the inner conductor barrel and a The second section is parallel to the axis of the inner conductor barrel, and the second section is in ohmic contact with the fixing frame.
  • the inner wall surface of the inner conductor barrel is coated with a low thermal conductivity coating.
  • the low thermal conductivity coating includes plastic or ceramic.
  • the present invention also constructs an aerosol generating device, including the above-mentioned microwave heater.
  • Implementing the present invention has the following beneficial effects: by arranging a cylindrical inner conductor barrel in the outer conductor unit, and arranging the probe device in the inner conductor barrel, the inner cavity of the inner conductor barrel becomes a heating chamber for accommodating the aerosol-generating substrate. , which can effectively reduce the overall height of the cavity and greatly improve the space utilization inside the cavity.
  • Figure 1 is a schematic three-dimensional structural diagram of a microwave heater in some embodiments of the present invention.
  • Figure 2 is a three-dimensional exploded structural diagram of the microwave heater shown in Figure 1;
  • FIG 3 is a schematic structural diagram of the longitudinal section of the microwave heater shown in Figure 2;
  • Figure 4 is a schematic structural diagram of the longitudinal section of the microwave heater shown in Figure 1;
  • FIG. 5 is a schematic top structural view of the microwave heater shown in Figure 1;
  • Figure 6 is a schematic longitudinal cross-sectional structural view of a microwave heater containing a second microwave feed device in other embodiments of the present invention.
  • FIG. 7 is a schematic longitudinal cross-sectional structural diagram of a microwave heater including a second outer conductor unit in other embodiments of the present invention.
  • aerosol generation device 100 microwave heater 1; microwave feed device 2; outer conductor unit 11; inner conductor unit 12; probe device 13; first open end 111; closed end 112; accommodation cavity 113; Conductor side wall 114; conductor end wall 115; assembly seat 116; positioning seat 117; protrusion 118; groove 119; air inlet gap 120; inner conductor barrel 121; conductor plate 122; fixing bracket 123; first lug 124 ; Second lug 125; Feeding hole 1141; Inner end surface 1151; Flat surface 1152; Convex surface 1153; Mounting hole 1154; Second open end 1211; Third open end 1212; Heating chamber 1213; Probe 131; Inner conductor 21; Outer conductor 22; dielectric layer 23; second outer conductor unit 11a; second conductor end wall 115a; second inner end surface 1151a; second flat surface 1152a; concave surface 1153a; second microwave feeding device 2a; second inner conductor 21a;
  • the first paragraph is 211; the second paragraph is
  • the aerosol generating device 100 in some embodiments of the present invention is shown.
  • the aerosol generating device 100 can use microwaves to heat an aerosol generating substrate to atomize it to generate an aerosol for use. Those who smoke.
  • the aerosol-generating substrate is a solid aerosol-generating substrate such as a processed plant leaf product. It can be understood that in other embodiments, the aerosol-generating matrix may also be a liquid aerosol-generating matrix.
  • the aerosol generating device 100 may include a microwave heater 1 in some embodiments; the microwave heater 1 may be substantially cylindrical, including a heating cavity 1213 and a microwave feeding device 2 .
  • the heating cavity 1213 serves as a place where microwaves continue to oscillate.
  • the microwave feeding device 2 is used to feed the microwave generated by the microwave generating device (not shown) into the heating cavity 1213 .
  • the aerosol-generating substrate can be inserted in the heating chamber 1213 and heated and atomized by microwaves to generate aerosol.
  • the resonant frequency is between 2-3GHz; preferably, the resonant frequency is controlled between 2.4-2.5GHz.
  • the microwave heater 1 further includes an outer conductor unit 11 , an inner conductor unit 12 and a medium (eg, air) disposed within the outer conductor unit 11 , and a probe device 13 .
  • the outer conductor unit is cylindrical and defines an accommodation cavity 113;
  • the inner conductor unit 12 is cylindrical and part of its structure is suspended in the accommodation cavity 113, and the above-mentioned heating cavity 1213 is defined in the accommodation cavity 113.
  • the height of the heating cavity 1213 is almost equal to that of the outer conductor unit 11;
  • the probe device 13 is disposed in the heating cavity 1213 and is in ohmic contact with the outer conductor 11.
  • the aerosol generating matrix can extend into the heating chamber 1213 and be sleeved on the outer periphery of the probe device 13 .
  • the axis of the inner conductor unit 12 and the axis of the outer conductor unit 11 are coincident or parallel to each other.
  • the outer conductor unit 11 is generally cylindrical in some embodiments and has a first open end 111 , a closed end 112 and a gap between the first open end 111 and the closed end 112 .
  • the outer conductor unit 11 may include an outer conductor barrel, which includes an electrically conductive conductor side wall 114 and a conductor end wall 115; the conductor side wall 114 is cylindrical, and the conductor end wall 115 is closed to the conductor.
  • the bottom end of the side wall 114 forms the closed end 112 of the outer conductor unit 11; the top end of the conductor side wall 114 has an open structure and forms the first open end 111 of the outer conductor unit 11.
  • a radially penetrating feed hole 1141 is provided on the conductor side wall 114 near the first open end 111 , and the feed hole 1141 is used for the microwave feed device 2 to be installed therein.
  • the conductor end wall 115 has an inner end surface 1151 relative to the first open end 111 , and the inner end surface 1151 and the inner peripheral wall surface of the conductor side wall 114 together form an accommodation cavity 113 .
  • the aerosol-generating substrate includes a substrate end surface extending into the heating chamber 1213; when the aerosol-generating substrate extends into the heating chamber 1213, the substrate end surface can abut against the inner end surface 1151 of the conductor end wall 115, so as to The entire aerosol-generating matrix is placed on the conductor end wall 115 .
  • the outer conductor unit 11 also includes two assembly seats 116 integrally combined on the outer conductor barrel; the two assembly seats 116 are disposed on the conductor side wall 114 near the first open end 111 The opposite sides extend outward along the outer circumference of the conductor side wall 114 and are respectively used to mechanically cooperate with the inner conductor barrel 121 in the inner conductor unit 12 .
  • Each mounting seat 116 is provided with a mounting hole, which is formed through the upper and lower surfaces of the mounting seat 116 in a direction parallel to the circumferential direction of the outer conductor unit 11 .
  • the number and positional relationship of the assembly seats 116 can also be adjusted adaptively according to actual needs.
  • the outer conductor unit 11 also includes a positioning seat 117 integrally combined with the outer conductor barrel; the positioning seat 117 is provided on the conductor side wall 114 near the first open end 111, and Extend outward along the outer circumference of the conductor sidewall 114 .
  • a protruding point is provided on the top surface of the positioning base 117 , and the protruding point can mechanically cooperate with one end of the inner conductor barrel 121 to position the end of the inner conductor barrel 121 on the positioning base 117 .
  • the feed hole 1141, the two assembly seats 116 and the positioning seats 117 are arranged at circumferential intervals along the conductor side wall 114, and the two assembly seats 116 are distributed on opposite sides of the conductor side wall 114 in the circumferential direction.
  • the holes 1141 and the positioning seats 117 are distributed on opposite sides of the conductor side wall 114 in the circumferential direction.
  • the outer conductor unit 11 can be integrally made of a conductive metal material, and its material can include at least one of aluminum, copper, gold, silver, and stainless steel; preferably aluminum alloy or copper . It can be understood that the outer conductor unit 11 is not limited to being integrally made of conductive material. It can also be realized by plating the first conductive coating on the inner wall surface of the non-conductive cylinder. Materials made of the first conductive coating may include gold, silver, copper, aluminum, conductive metal oxides or conductive polymers; wherein the conductive metal oxides may include ITO, AZO, AGZO and FTO materials. Preferably the first conductive coating is a silver coating or a gold coating.
  • the inner end surface 1151 of the conductor end wall 115 is a non-flat end surface, which is used to form an air inlet between the two surfaces when the inner end surface 1151 abuts the end surface of the aerosol-generating matrix.
  • the gap 120 is provided to prevent the end surface of the substrate from being in close contact with the inner end surface 1151 and thus preventing the airflow from entering the aerosol-generating substrate from the end surface of the substrate.
  • the inner end surface 1151 includes a flat surface 1152 and a convex surface 1153 that is higher than the flat surface 1152; the substrate end surface can abut against the convex surface 1153 when extending into the heating chamber 1213, so that There is a certain distance between the end surface of the substrate and the flat surface 1152 to form an air inlet gap 120 .
  • the conductor end wall 115 is provided with a protruding portion 118 protruding toward the first open end 111 , and the protruding portion 118 defines the inner end surface 1151 into a convex surface 1153 and a flat surface 1152 .
  • the projections of the protruding portion 118 and the substrate end surface respectively on the auxiliary plane parallel to the inner end face 1151 partially overlap; or, the projection of the protruding portion 118 on the auxiliary plane parallel to the inner end face 1151 is included in the projection of the substrate end face on the auxiliary plane parallel to the inner end face 1151. Projection on the auxiliary surface.
  • the protruding portion 118 can also prevent a large amount of heat from the aerosol-generating matrix from being transferred to the outer conductor barrel during the heating process.
  • the number of the protrusions 118 can also be more than two, and the number is not limited here. When the number of the protrusions 118 includes more than two, the plurality of protrusions 118 may be arranged at annular intervals around the central axis of the outer conductor unit 11 .
  • the protruding portion 118 is integrally integrated with the conductor end wall 115 to facilitate manufacturing; in other embodiments, the protruding portion 118 is processed separately and then embedded on the conductor end wall 115 .
  • the shape of the protruding portion 118 is not specifically limited here, and can be a rectangular parallelepiped, a truncated cone, a disk, etc., as long as the air intake gap 120 can be provided.
  • the protruding portion 118 can be made of conductive material to change the microwave field distribution so that the microwave field intensity at the end surface of the substrate is greater.
  • the protruding portion 118 may be made of low thermal conductivity material in some embodiments to block heat transfer as much as possible.
  • a mounting hole 1154 penetrating along the axial direction of the outer conductor unit 11 is also provided in the middle of the conductor end wall 115 for the probe device 13 to be installed therein.
  • the inner conductor unit 12 includes an inner conductor barrel 121 .
  • the top end of the inner conductor barrel 121 and the first open end 111 are located at approximately the same height relative to the outer conductor unit 11 , and the height of the inner conductor barrel 121 is approximately the same as the height of the accommodating cavity 113 .
  • the inner conductor barrel 121 is cylindrical, including a second open end 1211, a third open end 1212 opposite to the second open end 1211, and penetrating from the second open end 1211 to the third open end 1212.
  • the heating cavity 1213 is formed.
  • the outer diameter of the inner conductor barrel 121 is smaller than the inner diameter of the conductor side wall 114 , and there is a gap between the outer wall surface of the inner conductor barrel 121 and the inner peripheral wall surface of the outer conductor barrel; at the same time, its second open end 1211 is connected to the outer conductor unit 11
  • the first open end 111 forms a good ohmic contact; and its third open end 1212 extends toward the closed end 112 of the outer conductor unit 11 and is suspended in the accommodation cavity 113 without contacting the built-in end surface 1151 .
  • the heating chamber 1213 may be a right cylindrical channel located coaxially within the accommodating chamber 113 .
  • the inner conductor barrel 121 can be integrally made of conductive metal material, preferably aluminum alloy or copper. It can be understood that the inner conductor barrel 121 is not limited to being integrally made of conductive material. It can also be realized by plating a second conductive coating on the outer surface of a non-conductive body. The second conductive coating is preferably plated with silver coating or gold coating.
  • the inner peripheral wall surface of the inner conductor barrel 121 can also be plated with a low thermal conductivity coating to enhance the thermal insulation effect of the inner conductor barrel 121 .
  • Low thermal conductivity coatings can include plastics or ceramics. Plastics may include ptfe materials, peek materials, or ppsu materials in some embodiments. Ceramics may include quartz, alumina, zirconia in some embodiments. The low thermal conductivity coating can also be porous ceramics, such as porous silica, porous alumina, porous zirconia, etc.
  • the inner conductor barrel 121 is provided with an annular fixing bracket 123 at its second open end 1211 ; the fixing bracket 123 can be integrally connected to the inner conductor barrel 121 on the outer peripheral wall.
  • the outer diameter of the fixing bracket 123 is larger than the outer diameter of the conductor side wall 114 , and it can contact the conductor side wall 114 on the end wall of the first open end 111 to set the inner conductor barrel 121 in the accommodating cavity 113 .
  • the fixing frame 123 is also provided with two first lugs 124 and a second lug 125 extending outward along its peripheral wall.
  • the first lug 124 and the second lug 125 are integrally connected to the fixing bracket 123 .
  • Each first lug 124 can be attached to the assembly seat 116 and mechanically cooperate with the assembly seat 116 .
  • the first lug 124 is provided with a through hole; a bolt can be passed through the through hole and the assembly hole on the assembly base 116 to fix one end of the inner conductor barrel 121 to the outer conductor unit 11 .
  • the second lug 125 is provided with a through hole, and the second lug 125 can be sleeved on the outer periphery of the protruding point to fit on the positioning seat 117 .
  • the number and position of the first lugs 124 on the fixing frame 123 are consistent with those of the assembly base 116; the position of the second lugs 125 on the fixing frame 123 are consistent with those of the positioning base 117. match.
  • the inner conductor unit 12 also includes a conductive disk 122 that is used to increase its own inductance and capacitance and reduce the resonant frequency, thereby facilitating further changes in the size of the accommodation cavity 113 .
  • the conductor disk 122 is annular and is sleeved on the peripheral wall of the inner conductor barrel 121 at the third open end 1212 .
  • the outer diameter of the conductor disk 122 is smaller than the inner diameter of the conductor side wall 114 .
  • the conductor disk 122 is integrally combined with the inner conductor barrel 121; in some embodiments, the conductor disk 122 is in ohmic contact with the inner conductor barrel 121.
  • the number of conductor disks 122 may be one or more. When the number of conductor disks 122 includes multiple, the plurality of conductor disks 122 can be arranged at axial intervals on the outer circumference of the inner conductor barrel 121; the diameter and thickness of each conductor disk 122 can be the same or different, and the specific size can be It is determined through simulation and experiment, and there is no specific limit here.
  • the conductor plate 122 can be integrally made of conductive metal material, preferably aluminum alloy or copper. It can be understood that the conductor disk 122 is not limited to being integrally made of conductive material. It can also be realized by plating a third conductive coating on the outer surface of a non-conductive body. The third conductive coating is preferably plated with silver coating or gold coating.
  • the probe device 13 can be used as an independent structure, extracted/inserted to the bottom of the outer conductor unit 11 , and disposed in the heating cavity 1213 . There is a gap between the outer wall surface of the probe device 13 and the inner wall surface of the inner conductor barrel 121 . It can be understood that the probe device 13 is used to introduce the microwave field into the interior of the aerosol-generating matrix, thereby effectively heating the aerosol-generating matrix; at the same time, the probe device 13 can adjust the microwave field distribution and adjust the accommodation cavity 113 The resonant frequency probe device 13 is beneficial to reducing the height of the cavity.
  • the probe device 13 may include a longitudinal probe 131; the bottom end of the probe 131 is embedded in the mounting hole 1154 of the conductor end wall 115 to form good ohmic contact with the outer conductor unit 11, and The bottom end protrudes from the bottom surface of the conductor end wall 115 relative to the inner end surface 1151; the top end of the probe 131 extends toward the first open end 111 as a free end and is located in the heating cavity 1213.
  • the top end of the probe 131 extends to be flush with the first open end 111 of the outer conductor unit 11 at most.
  • the top shape of the probe 131 may include a plane, a sphere, an ellipsoid, a cone, or a truncated cone; the top shape is preferably a truncated cone to enhance the local field strength, thereby increasing the mist of the aerosol-generating medium. transformation speed.
  • the probe 131 can be integrally made of conductive metal material, preferably stainless steel, aluminum alloy or copper. It can be understood that the probe 131 is not limited to being integrally made of conductive material. It can also be realized by plating a fourth conductive coating on the outer surface of a non-conductive body.
  • the fourth conductive coating may include gold, silver, copper, aluminum, conductive metal oxides, or conductive polymers; wherein the conductive metal oxides include ITO, AZO, AGZO, and FTO materials; preferably, the silver coating or gold coating is plated. layer.
  • probe 131 is a hollow structure.
  • the probe device 13 also includes a temperature measuring element (not shown) provided in the probe 131.
  • the temperature measuring element is used to monitor the internal temperature of the aerosol generating substrate provided in the heating chamber 1213 to facilitate temperature control.
  • the microwave feed device 2 can be a coaxial connector and can be installed on the outer conductor barrel from the feed hole 1141 of the outer conductor unit 11 . It can be understood that the microwave feeding device 2 is installed close to the first opening end 111, which can effectively utilize the internal space of the aerosol generating device 100 for structural stacking, which is beneficial to reducing the height and miniaturization of the entire machine.
  • the microwave feeding device 2 includes an inner conductor 21 , an outer conductor 22 , and a dielectric layer 23 between the inner conductor 21 and the outer conductor 22 .
  • the microwave feed device 2 When the microwave feed device 2 is installed on the outer conductor barrel, its inner conductor 21 is in ohmic contact with the inner conductor barrel 121 , and its outer conductor 22 is in ohmic contact with the surface of the outer conductor unit 11 to feed microwaves into the microwave heater 1 .
  • the inner conductor 21 of the microwave feed device 2 is in a straight shape.
  • the inner conductor 21 is in ohmic contact with the outer peripheral wall of the inner conductor barrel 121 and is in ohmic contact with the axis of the inner conductor barrel 121. Perpendicular to each other.
  • FIG 6 shows a second microwave feed device 2a in other embodiments of the present invention, which has basically the same structure as the above-mentioned microwave feed device 2.
  • the difference between the two is that the second internal microwave feed device 2a is used.
  • the conductor 21a replaces the inner conductor 21 in the microwave feeding device 2 described above.
  • the second inner conductor 21a is L-shaped in this embodiment, and may include a first section 211 perpendicular to the axis of the microwave heater 1 and a second section 212 parallel to the axis of the microwave heater 1; the second section 212 is opposite to The first section 211 is closer to the inner conductor unit 12 and forms ohmic contact with the fixing bracket 123 in the inner conductor unit 12 .
  • FIG. 7 shows the second outer conductor unit 11 a in other embodiments of the present invention, which has basically the same structure as the above-mentioned outer conductor unit 11 .
  • the difference between the two is that the second conductor end wall is used.
  • 115a replaces the conductor end wall 115 of the outer conductor barrel described above.
  • the second conductor end wall 115a includes a second inner end surface 1151a relative to the first open end 111; the second inner end surface 1151a includes a second flat surface 1152a and a concave surface 1153a that is lower than the second flat surface 1152a. ; When the substrate end surface extends into the heating chamber 1213, it can contact the second plane 1152a, so that there is a certain distance between the substrate end surface and the concave surface 1153a to form the air inlet gap 120.
  • the second conductor end wall 115a is provided with a groove 119 that is recessed toward the closed end 112, and the groove 119 defines a second plane 1152a and a concave surface 1153a on the second inner end surface 1151.
  • the projections of the groove 119 and the substrate end surface respectively on the auxiliary surface parallel to the second inner end surface 1151a partially overlap, so that the substrate end surface can only cover part of the notch of the groove 119 to ensure that the airflow can enter from the notch. , and enters the end surface of the substrate through the inner cavity of the groove 119.
  • the number of grooves 119 can also be more than two, and the number is not limited here.
  • the plurality of grooves 119 may be arranged at annular intervals around the central axis of the outer conductor unit 11 .
  • the shape of the groove 119 is not specifically limited here, as long as it can provide the air intake gap 120 .
  • the present invention also constructs a second aerosol generating device, which has basically the same structure as the above-mentioned aerosol generating device.
  • a fixing device (not shown) is added; the fixing device It can be installed above the inner conductor barrel 121 to hold the aerosol-generating substrate and prevent the aerosol-generating substrate from shifting during the suction process.
  • the fixing device includes a cylindrical fixing base and a plurality of longitudinal positioning ribs located in the fixing base.
  • the fixing base can be coaxially fixed on the top surface of the fixing frame 123, and its inner diameter is larger than the diameter of the aerosol generating matrix; the positioning ribs are evenly spaced on the inner peripheral wall of the fixing base, and each positioning rib is along the Extends in a direction parallel to the axis of the fixed seat.
  • the fixed seat is located above the heating cavity 1213 in a weak microwave field area or a non-microwave field area, which can avoid the presence of other absorbing components in the microwave field that compete with the aerosol-generating matrix, thereby causing the radiation to enter the outer conductor.
  • the microwaves in unit 11 can be fully absorbed by the aerosol-generating matrix, thereby improving the carbonization effect of the aerosol-generating matrix.
  • these positioning ribs can be used to clamp the aerosol-generating matrix that passes through the fixed seat.
  • a longitudinally extending air inlet channel can be formed between each two adjacent positioning ribs to facilitate the placement of the outer conductor. The ambient air outside the unit 11 is sucked into the end surface of the aerosol-generating matrix, and then enters the aerosol-generating matrix, thereby taking away the aerosol generated by the microwave heating.
  • the fixed base may be made of polymer materials, ceramic materials, metal or glass materials.
  • Polymer materials include polytetrafluoroethylene (PTFE), polyetheretherketone (PEEK), ppsu, pc, ABS, pp materials; ceramic materials include alumina and zirconia.
  • the fixed base is preferably made of a polymer material with low cost and low thermal conductivity.

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Abstract

L'invention concerne un dispositif de chauffage à micro-ondes (1) et un dispositif de génération d'aérosol (100). Le dispositif de chauffage à micro-ondes (1) comprend : une unité conductrice externe (11) qui est cylindrique et a une première extrémité ouverte (111) et une extrémité fermée (112) ; un dispositif de sonde (13), le dispositif de sonde (13) étant allongé et ayant une extrémité fixée à l'extrémité fermée (112) et reliée de manière ohmique à l'extrémité fermée (112), et l'autre extrémité s'étendant vers la première extrémité ouverte (111) ; et une unité conductrice interne (12) comprenant un cylindre conducteur interne (121) ayant une forme cylindrique. Le cylindre conducteur interne (121) est disposé axialement dans l'unité conductrice externe (11) et entoure le dispositif de sonde (13) ; et des espacements sont formés entre une surface de paroi externe du cylindre conducteur interne (121) et une surface de paroi interne de l'unité conductrice externe (11) et entre une surface de paroi interne du cylindre conducteur interne (121) et une surface de paroi externe du dispositif de sonde (13). La hauteur d'une cavité de chauffage (1213) peut être efficacement réduite, et un taux d'utilisation d'espace dans la cavité est amélioré.
PCT/CN2023/080903 2022-08-12 2023-03-10 Dispositif de chauffage à micro-ondes et dispositif de génération d'aérosol WO2024031982A1 (fr)

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