CN114886160A

CN114886160A - Aerosol generating device

Info

Publication number: CN114886160A
Application number: CN202210542549.8A
Authority: CN
Inventors: 杜靖
Original assignee: Shenzhen Maishi Technology Co Ltd
Current assignee: Shenzhen Maishi Technology Co Ltd
Priority date: 2022-05-18
Filing date: 2022-05-18
Publication date: 2022-08-12
Also published as: WO2023221596A1

Abstract

The present invention relates to an aerosol generating device comprising a microwave resonator; the microwave resonator comprises an outer conductor unit and an inner conductor unit, wherein the outer conductor unit is used for defining a resonant cavity, the inner conductor unit is arranged in the outer conductor unit, the outer conductor unit is provided with an open end and a closed end, one end of the inner conductor unit is connected with the closed end of the outer conductor unit, and the other end of the inner conductor unit extends towards the open end of the outer conductor unit; the inner conductor unit comprises a conductor post, the conductor post comprises a fixed end connected with the closed end of the outer conductor unit and a free end extending towards the open end of the outer conductor unit; the inner conductor unit further comprises a first conductor disc in ohmic contact with the conductor post; the first conductor disc is arranged at the free end; which can effectively reduce the height of the resonant cavity.

Description

Aerosol generating device

Technical Field

The invention relates to the field of electronic atomization, in particular to an aerosol generating device.

Background

A Heat Not Burning (HNB) device is a combination of a heating device plus an aerosol generating substrate (a treated plant leaf product). The external heating means is heated by the elevated temperature to a temperature at which the aerosol-generating substrate is capable of generating an aerosol but is not sufficiently combustible to enable the aerosol-generating substrate to generate the aerosol for the user without combustion.

Microwave heating devices are currently marketed as a means of heating aerosol-generating substrates, the microwaves of which are typically fed into the device from one end and then resonated within a resonator. In the coaxial microwave heating cavity in the related art, due to the limitation of the λ/4 wavelength principle, the height of the cavity is generally above 30mm, and how to reduce the height of the cavity is a technical problem to be overcome in the related industry.

At present, the cavity for microwave heating is mainly designed based on a lambda/4 coaxial resonant cavity. In the related art, the height of the coaxial resonant cavity is reduced by adding a high dielectric material in the cavity. However, in this solution, although the dielectric loss of the selected high dielectric material is small (less than 0.001), the position of the selected high dielectric material is generally in a strong field region, and the high dielectric material is inevitably heated while the medium of plant leaves is heated by microwave. This can cause problems, on the one hand, in that energy entering the cavity is absorbed by the high dielectric material, resulting in a reduction in the energy to heat the aerosol-generating substrate, reducing the rate of temperature rise of the aerosol-generating substrate; on the other hand, the high dielectric material has obvious temperature rise, and the contact with the cavity can cause the obvious temperature rise of the cavity, thereby bringing about the heat dissipation problem.

Disclosure of Invention

The present invention addresses the deficiencies of the related art by providing an improved aerosol generating device.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention constructs an aerosol generating device, comprising a microwave resonator; the microwave resonator comprises an outer conductor unit and an inner conductor unit, wherein the outer conductor unit is used for defining a resonant cavity, the inner conductor unit is arranged in the outer conductor unit, the outer conductor unit is provided with an open end and a closed end, one end of the inner conductor unit is connected with the closed end of the outer conductor unit, and the other end of the inner conductor unit extends towards the open end of the outer conductor unit;

said inner conductor unit including a conductor post, said conductor post including a fixed end connected to said outer conductor unit closed end and a free end extending toward said outer conductor unit open end;

the inner conductor unit further comprises a first conductor disc in ohmic contact with the conductor post; the first conductor plate is disposed at the free end.

Preferably, said first conductor disc is fixed to said free end wall.

Preferably, the first conductor disc is integrally formed with the conductor post.

Preferably, the first conductor disc is coaxial with the conductor post.

Preferably, the first conductor disc and the conductor post are made of metal material,

or a third conducting layer is arranged on the surface of the first conductor disc, and a second conducting layer is arranged on the surface of the conductor column.

Preferably, the inner conductor unit further includes at least one second conductor disc having an annular shape, the at least one second conductor disc coaxially surrounding the outer peripheral wall of the conductor post and being in ohmic contact with the conductor post.

Preferably, the at least one second conductor disc is arranged below the first conductor disc at a spacing in the axial direction of the conductor column.

Preferably, the first conductor disc is disc-shaped.

Preferably, the diameter of the first conductor disc is larger than the diameter of the conductor post.

Preferably, the inner conductor unit further comprises electrically conductive probe means; the probe means is in ohmic contact with the first conductor plate.

Preferably, the inner conductor unit further comprises a through-going channel axially penetrating the conductor post and the first conductor disc; one end of the probe device, which is close to the first conductor disc, is inserted into the through channel and is in ohmic contact with the conductor column and the first conductor disc.

Preferably, the probe device comprises a hollow probe which can conduct electricity and is long and a temperature measuring component arranged in the hollow probe;

one end of the hollow probe close to the first conductor disc is inserted into the first conductor disc and the conductor column in sequence, and the outer wall surface of the hollow probe is in ohmic contact with the first conductor disc and/or the conductor column.

Preferably, the shape of the end of the hollow probe remote from the conductor column comprises a shape that is planar, spherical, ellipsoidal, conical or truncated cone.

Preferably, the hollow probe comprises a second electrically conductive side wall and a second electrically conductive end wall;

one end of the second side wall, which is far away from the first conductor disc, extends towards the direction of the second end wall so as to be connected with the second end wall.

Preferably, the maximum diameter of the end of the second side wall remote from the first conductor disc is greater than the diameter of the second end wall.

Preferably, the end of the second side wall remote from the first conductor disc is smoothly connected to the second end wall.

Preferably, the hollow probe further comprises a hollow channel extending axially therealong; the temperature measuring assembly is contained in the hollow channel.

Preferably, the microwave resonator is a quarter-wave long coaxial line resonator.

Preferably, the aerosol-generating device further comprises a receptacle for holding an aerosol-generating substrate; the accommodating seat comprises an accommodating part which is arranged in the resonant cavity and is used for accommodating the aerosol generating substrate;

the bottom of the accommodating part is attached to the top of the first conductor disc.

The invention also constructs an aerosol generating device, which comprises a quarter-wavelength coaxial resonator; the coaxial line resonator comprises a resonant cavity and an inner conductor unit positioned in the resonant cavity;

the inner conductor unit comprises a conductor post close to the short-circuit end of the coaxial line resonator;

the inner conductor unit further comprises a first conductor disc in ohmic contact with the conductor post; the first conductor plate is arranged on the top of the conductor column.

Preferably, the first conductor disc is disc-shaped and coaxially fixed to the top of the conductor column.

Preferably, the outer diameter of the first conductor disc is larger than the diameter of the conductor post.

Preferably, the aerosol generating device further comprises a receiving seat mounted at the open end of the coaxial line resonator;

the accommodating seat comprises an accommodating part for accommodating aerosol generating substrate, and the accommodating part is positioned in the resonant cavity of the coaxial line resonator;

the inner conductor unit further comprises a probe device close to the open end, and the probe device comprises a hollow probe capable of conducting electricity; the hollow probe is in ohmic contact with the first conductor disc, and one end of the hollow probe extends into the accommodating part to act on the aerosol generating substrate.

Preferably, one end of the hollow probe, which is far away from the conductor column, extends into the accommodating part; one end of the hollow probe close to the conductor post is inserted into the first conductor disc and the conductor post, and the outer wall surface of the hollow probe is connected with the first conductor disc and the conductor post.

Preferably, the shape of the end of the hollow probe remote from the conductor column comprises a shape of a plane, a sphere, an ellipsoid, a cone or a truncated cone.

The aerosol generating device has the following beneficial effects: the first conductor disc structure is additionally arranged at the top of the inner conductor in the resonant cavity, so that the height of the resonant cavity can be effectively reduced; the method avoids the side effects of reducing the energy for heating the aerosol generating substrate, reducing the heating speed of the aerosol generating substrate, solving the heat dissipation problem and the like brought by the related technology.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

figure 1 is a schematic perspective view of an aerosol-generating device according to some embodiments of the present invention in cooperation with an aerosol-generating substrate;

figure 2 is a schematic perspective view of an aerosol generating device according to some embodiments of the present invention;

FIG. 3 is a schematic longitudinal cross-sectional view of the aerosol generating device of FIG. 2;

FIG. 4 is a schematic perspective exploded view of the aerosol generating device of FIG. 2;

FIG. 5 is a schematic longitudinal cross-sectional view of the aerosol generating device of FIG. 4 in an exploded configuration;

FIG. 6 is a schematic longitudinal cross-sectional view of a probe device in an aerosol generating device according to the present invention;

FIG. 7 is a schematic perspective view of an aerosol generating device according to further embodiments of the invention;

figure 8 is a schematic perspective view of an aerosol generating device according to further embodiments of the present invention;

figure 9 is a graph of the resonant frequency of the aerosol generating device of the present invention without the first conductor disc;

figure 10 is a graph of the resonant frequency of an aerosol generating device of the present invention with a first conductor disc disposed;

figure 11 is a graph of the resonant frequency of an aerosol generating device of the present invention in a condition in which the diameter of the first conductor disc is defined as 10mm and the inner diameter of the outer conductor unit is defined as 10.6 mm;

figure 12 is a graph of the resonant frequency of an aerosol generating device of the present invention in a state in which the diameter of the first conductor disc thereof is defined as 8mm and the inner diameter of the outer conductor unit thereof is defined as 10.6 mm;

figure 13 is a graph of the resonant frequency of an aerosol generating device of the present invention in a condition in which the diameter of the first conductor disc is defined as 10.4mm and the inner diameter of the outer conductor unit is defined as 10.6 mm;

FIG. 14 is a microwave field distribution plot for a hollow probe with a flat-topped top in an aerosol generating device according to the present invention;

FIG. 15 is a microwave field distribution diagram of a hollow probe with a truncated cone-shaped top in an aerosol generating device according to the present invention.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

Figures 1 to 6 show an aerosol-generating device 1 according to embodiment 1 of the invention, the aerosol-generating device 1 being operable to heat an aerosol-generating substrate 40 using microwaves to atomise and generate an aerosol for inhalation by a user. In some embodiments, the aerosol-generating substrate 40 is a solid aerosol-generating substrate such as a treated plant leaf product. It will be appreciated that in other embodiments the aerosol-generating substrate 40 may also be a liquid aerosol-generating substrate.

As further shown in fig. 2-6, the aerosol generating device 1 may include a microwave resonator 10, a receptacle 20, and a microwave feedthrough 30. The microwave resonator 10, which may be cylindrical in some embodiments, may include a resonant cavity 13 in which the microwaves are continuously oscillated. The receptacle 20 is for holding an aerosol-generating substrate 40 and is fixedly or removably mounted to the microwave resonator 10 so that the aerosol-generating substrate 40 therein is exposed to a microwave field within the resonant cavity 13 for microwave heating for atomisation. A microwave feed 30 is connected to the microwave resonator 10 for feeding microwaves generated by a microwave generating device (not shown) into the resonant cavity 13. It is to be understood that the microwave resonator 10 is not limited to a cylindrical shape, but may have other shapes such as a square cylinder, an elliptic cylinder, and the like.

The microwave resonator 10 may be a quarter-wave coaxial line resonator in some embodiments, and may include a cylindrical outer conductor unit 11 for implementing electromagnetic shielding, an inner conductor unit 12 disposed inside the outer conductor unit 11, and a medium (e.g., air) between an outer wall surface of the inner conductor unit 12 and an inner wall surface of the outer conductor unit 11, where the outer conductor unit 11 and the inner conductor unit 12 together define the resonant cavity 13.

The first end of the inner conductor element 12 is in ohmic contact with the first end wall 112 of the outer conductor element 11, forming a short-circuited end a of the microwave resonator 10. The second end of the inner conductor element 12 extends towards the first opening 110 of the outer conductor element 11 and does not make direct ohmic contact with the outer conductor element 11, forming the open end B of the microwave resonator 10. A receptacle 20 is mounted (e.g., removably or non-removably inserted) to the open end B of the microwave resonator 10 and is connected to the second end of the inner conductor unit 12. In some embodiments, the axis of the inner conductor unit 12 and the axis of the outer conductor unit 11 coincide or are parallel to each other, preferably both.

The outer conductor unit 11 may in some embodiments comprise an electrically conductive first sidewall 111, an electrically conductive first end wall 112, and a first opening 110. The first sidewall 111 may be cylindrical in some embodiments, and includes a first end and a second end opposite the first end. The first end wall 112 is closed on the first end of the first side wall 111 to form a closed end of the outer conductor unit 11. The first opening 110 is formed on the second end of the first sidewall 111, forming an open end of the outer conductor unit 11, for the receiving seat 20 to be embedded therein. A feed-in hole 1110 may be formed in the first sidewall 111 of the outer conductor unit 11 near the first end wall 112, and is radially penetrated for installing the microwave feed-in device 30 therein.

The outer conductor unit 11 may be made of a conductive metal material, such as aluminum alloy, copper, gold, silver, stainless steel, etc., and may be integrally formed. It is to be understood that the outer conductor unit 11 is not limited to be integrally made of a conductive material, and may be formed by plating a first conductive layer on an inner wall surface of a non-conductive cylinder. The first conductive layer may be a gold plating layer, a silver plating layer, a copper plating layer, or the like in some embodiments. It should be understood that the outer conductor unit 11 is not limited to a cylindrical shape, and may have other suitable shapes such as a square cylinder shape and an elliptical cylinder shape.

As shown in fig. 3-6, the inner conductor unit 12 may include a conductor post 121, a first conductor pad 123 on top of the conductor post 121, and a probe device 122 with one end embedded in the conductor post 121 in some embodiments; the other end of the probe device 122 is inserted into the receptacle 20 to act on the aerosol-generating substrate 40. The conductor post 121 is connected to the outer conductor unit 11 to form a good ohmic contact with the outer conductor unit 11. The first conductor disc 123 serves to increase self-inductance as well as capacitance, thereby enabling the overall size of the aerosol-generating device 1 to be further reduced. The probe device 122 is in good ohmic contact with the conductive column 121, so that microwaves can be conducted to the probe device 122 through the conductive column 121. In some embodiments, the probe arrangement 122 is particularly configured in shape and layout to promote a more uniform distribution of the microwave field to the receptacle 20, thereby achieving a more uniform microwave heating effect on the aerosol-generating substrate 40 in the receptacle 20, thereby enhancing utilization of the aerosol-generating substrate 40.

As shown in fig. 4 and 5, the conductor post 121 is cylindrical, is disposed in the outer conductor unit 11, and extends in the axial direction of the outer conductor unit 11. Preferably, the axis of the conductor post 121 coincides with the axis of the outer conductor unit 11. Further, one end of the conductor post 121 close to the first end wall 112 of the outer conductor unit 11 is fixedly connected to an inner wall surface of the first end wall 112 of the outer conductor unit 11, and forms one fixed end of the conductor post 121. An end of the conductor post 121 remote from the first end wall 112 extends towards the first opening 110 of the outer conductor unit 11 forming a free end of the conductor post 121, which free end of the conductor post 121 is connectable to the first conductor disc 123.

In some embodiments, the conductive post 121 may be made of a conductive material such as metal, preferably aluminum alloy or copper. In other embodiments, the conductive post 121 may be formed by coating the outer wall surface of the cylinder made of non-conductive material with a second conductive layer, which is a metal-plated thin film layer, such as a gold-plated layer, a silver-plated layer, a copper-plated layer, or the like. Further, it is understood that in some embodiments, the conductive pillar 121 has a cylindrical shape, but may have other shapes such as a square pillar shape, an elliptical pillar shape, a stepped pillar shape, an irregular pillar shape, and the like.

As shown in fig. 4-5, the first conductor pad 123 is connected to the end of the conductor post 121 remote from the first end wall 112, i.e. to the top of the conductor post 121, and the first conductor pad 123 forms a good ohmic contact with the conductor post 121. The diameter of the first conductor disc 123 is larger than the diameter of the conductor column 121. In some embodiments, the bottom of the first conductor pad 123 is snugly and fixedly attached to the top of the conductor post 121. The above-mentioned connection mode can be welding, bonding, screw connection or integrated forming mode.

In some embodiments, the first conductor pad 123 may be made of a conductive material such as metal, preferably aluminum alloy or copper. In other embodiments, the first conductor pad 123 may also be formed by coating the outer wall surface of the non-conductive material with a third conductive layer, which is a metal-plated thin film layer, such as a gold-plated layer, a silver-plated layer, a copper-plated layer, or the like. Preferably, the first conductor pad 123 is made of the same material as the conductor pillar 121, i.e. of the same conductive material, or of the same non-conductive material and coated with the same conductive layer, i.e. of the same material as the second conductive layer. Further, in some embodiments, the first conductor disc 123 is disc-shaped, in particular, the first conductor disc 123 is cylindrical with a diameter larger than its axial length. Of course, the first conductor plate 123 may have other shapes such as a square column shape, an elliptic column shape, a stepped column shape, an irregular column shape, and the like, and the shape and the size of the first conductor plate 123 are confirmed according to simulation, so as to meet the requirement of reducing the height of the cavity.

As shown in fig. 8, the inner conductor unit 12 further comprises in some embodiments at least one second conductor pad 124 in ohmic contact with the conductor pillar 121, the at least one second conductor pad 124 being arranged below the first conductor pad 123. Specifically, the at least one second conductor disc 124 is annular and coaxially surrounds the outer circumferential wall of the conductor post 121.

In some embodiments, the second conductor pad 124 may be made of a conductive material such as metal, preferably aluminum alloy or copper. In other embodiments, the second conductor pad 124 may also be formed by coating the outer wall surface of the non-conductive material with a sixth conductive layer, which is a metal-plated thin film layer, such as a gold-plated layer, a silver-plated layer, a copper-plated layer, or the like. Preferably, the first conductor pad 123, the second conductor pad 124 and the conductor post 121 are made of the same material, i.e. made of the same conductive material, or are made of the same non-conductive material and coated with the same material of the sixth conductive layer. Further, in some embodiments, the second conductor disk 124 is in the form of an annular disk structure. Of course, it may also be in other shapes such as an annular square column structure, an annular elliptic column structure, an annular stepped column structure, an annular irregular column structure, etc.; the shape and size of the second conductor disk 124 are specifically determined from simulations to meet the requirement of reducing the height of the cavity.

When the number of the second conductor discs 124 is one, the second conductor discs 124 are arranged at intervals below the first conductor discs 123, and the outer diameters of the second conductor discs 124 and the first conductor discs 123 may be the same or different. When the number of the second conductor pads 124 is plural, the plural second conductor pads 124 are located below the first conductor pad 123 and are uniformly arranged on the outer circumferential wall of the conductor column 121 at intervals along the axial direction of the conductor column 121, and the interval between the second conductor pad 124 adjacent to the first conductor pad 123 and the first conductor pad 123 is equal to the interval between two adjacent second conductor pads 124; the outer diameters between the plurality of second conductor discs 124 may be the same or different, and the outer diameter of the first conductor disc 123 may be partially the same, completely the same, or completely different from the outer diameter between the plurality of second conductor discs 124. In the meantime, the specific dimensions of each of the first conductor disk 123 and the second conductor disk 124 can be determined by simulation and experiment.

It will be appreciated that the frequency shift will occur during heating of the aerosol-generating substrate 40 by the aerosol-generating device 1, and that the shift in frequency will become smaller as the thickness of the first conductor disc 123, or the first and second conductor discs 123, 124, is greater; however, when the thickness of the first conductor disk 123, or the first conductor disk 123 and the second conductor disk 124 reaches a certain level, the magnitude of the decrease in the frequency becomes relatively extremely small. In addition, the influence of the diameters of the first conductor plate 123 or the first conductor plate 123 and the second conductor plate 124 on the frequency is large, and when the diameters of the first conductor plate 123 or the first conductor plate 123 and the second conductor plate 124 are larger, the resonance frequency is lower, which is more advantageous for reducing the axial length of the outer conductor unit 11. In engineering applications, it is preferred to mount the first conductor pad 123 only on top of the conductor column 121 for cost and size control.

As shown in fig. 5, the inner conductor unit 12 further comprises a through passage 1211 extending axially through the conductor post 121 and the first conductor disc 123, the through passage 1211 being adapted for insertion and/or penetration of the probe device 122. Specifically, the through passage 1211 has a straight cylindrical shape and is formed to penetrate axially along the central axis of the conductor post 121 and the first conductor plate 123. In this embodiment, one end of the hollow probe 1221 of the probe device 122 near the first conductor disc 123 is inserted through the passage 1211 to embed the probe device 122 on the conductor column 121.

It should be noted that, when the conductor post 121 or the first conductor pad 123 is made of a non-conductive material + the third conductive layer is coated, the inner wall surface of the through channel 1211 corresponding to the position of the conductor post 121 or the first conductor pad 123 needs to be coated with the third conductive layer, so that the hollow probe 1221 can form a good ohmic contact with the first conductor pad 123 or the first conductor pad 123 and the conductor post 121. As further shown in fig. 3-6, the probe device 122 may include an electrically conductive and elongated hollow probe 1221, and a temperature measuring assembly 1222 disposed within the hollow probe 1221. The hollow probe 1221 may be in ohmic contact with the first conductor pad 123, or the conductor post 121 and the first conductor pad 123. In other embodiments, one end of the hollow probe 1221 near the first conductor disc 123 is inserted into the through channel 1211 from the top of the first conductor disc 123, and passes through the first conductor disc 123 and then is disposed in the through channel 1211 at a position corresponding to the conductor post 121, so that the corresponding outer peripheral surface of the hollow probe 1221 is connected to the first conductor disc 123 and the conductor post 121 to form a good ohmic contact. Optionally, the hollow probe 1221, the first conductor disc 123, the conductor post 121 are arranged coaxially. In addition, the temperature measurement component 1222 is used to monitor the temperature inside the aerosol-generating substrate 40 as the aerosol-generating substrate 40 is inserted into the hollow probe 1221.

It should be noted that the hollow probe 1221 needs to be externally conductive and form a good ohmic contact with the first conductor pad 123; meanwhile, the higher the conductivity of the outer surface of the hollow probe 1221 is, the easier the microwave conduction is, and it is also possible to prevent the hollow probe 1221 from consuming microwaves through wall current loss, resulting in self-heating.

Further, the hollow probe 1221 has a hollow structure, and includes a second side wall 1223 capable of conducting electricity, a second end wall 1224 capable of conducting electricity, and a second opening 1225. The second sidewall 1223 may be cylindrical in some embodiments; a second end wall 1224 is closed to an end of the second side wall 1223 distal to the first conductor disk 123 to form a closed end of the hollow probe 1221. A second opening 1225 is formed at one end of the second side wall 1223 near the first conductor tray 123, forming one open end of the hollow probe 1221; the second opening 1225 is used for the connection line 1228 of the temperature measuring component 1222 to pass through. The second side wall 1223, the second end wall 1224, and the second opening 1225 together form a hollow passage 1226 with an opening, and the temperature measuring assembly 1222 is received in the hollow passage 1226.

The end of the hollow probe 1221 away from the first conductor plate 123 extends toward the receptacle 20 and is inserted into the receptacle 20. In some embodiments, the top of the hollow probe 1221, i.e., the end thereof distal to the first conductor disk 123, may be flat-topped, spherical, ellipsoidal, conical, truncated-cone-shaped, etc.; preferably, the top of the hollow probe 1221 is a truncated cone. In some embodiments, the end of the second sidewall 1223 adjacent the second end wall 1224 extends in the direction of the second end wall 1224 to connect to the outer peripheral edge of the second end wall 1224; wherein the second end wall 1224 is a planar structure having a diameter less than the maximum diameter of the end of the second side wall 1223 adjacent the second end wall 1224. In some embodiments, the connection between the end of the second sidewall 1223 adjacent the second end wall 1224 and the second end wall 1224 is a smooth connection.

It will be appreciated that by optimizing the shape of the top of the hollow probe 1221, the local field strength of the microwave field can be enhanced to enhance the rate of atomization of the atomized aerosol-generating substrate 40; wherein the effect is best when the top of the hollow probe 1221 is in the shape of a truncated cone.

In some embodiments, the hollow probe 1221 may be made of a conductive material such as metal, preferably stainless steel, aluminum alloy or copper. In other embodiments, the hollow probe 1221 may be made of a non-conductive material, but it is desirable to coat the outer wall surface with a fourth conductive layer, which is a metal-plated thin film layer, such as a gold-plated layer, a silver-plated layer, a copper-plated layer, or the like. Further, in some embodiments, the cross-section of the hollow probe 1221 is circular, although it may be square, oval, triangular, etc.

Further, the temperature measuring component 1222 can be a temperature sensor, such as a temperature thermocouple. In some embodiments, temperature measurement assembly 1222 can include a temperature measurement probe 1227 and a connection wire 1228 electrically connected to temperature measurement probe 1227. The temperature probe 1227 is disposed in an end of the hollow probe 1221 remote from the first conductor disc 123, and is electrically connected to a control device (not shown) in the aerosol-generating device 1 via a connection 1228 disposed between the through passage 1211 and the hollow passage 1226, so as to feed back the temperature inside the aerosol-generating substrate 40 to the control device.

As further shown in fig. 5, the receiving seat 20 may include a receiving portion 21 and a fixing portion 22 integrally connected to the receiving portion 21. The receiving portion 21 is for receiving the aerosol-generating substrate 40; the fixing portion 22 is axially closed on the first opening 110 of the outer conductor unit 11, and is connected to the inner conductor unit 12 by inserting the receiving portion 21 into the receiving portion 21. The housing base 20 may be made of a high temperature resistant material with low dielectric loss in some embodiments, for example, a composite of one or more of plastic, ceramic, glass, alumina, zirconia, and silica. In addition, among the plastic materials, polytetrafluoroethylene PEEK, polyetheretherketone PTFE, PPSU polyphenylene sulfone resin are preferable; among the ceramic materials, glass, quartz glass, alumina, zirconia are preferred. The loss tangent of the material of the housing 20 is preferably less than 0.1.

The receptacle 20 may include a plurality of elongated positioning ribs 23 and a plurality of elongated support ribs 25 in some embodiments. The positioning ribs 23 are uniformly arranged in the circumferential direction of the wall surface of the accommodating cavity 210 and/or the first through hole 220. Each positioning rib 23 extends in a direction parallel to the axis of the housing seat 20. The support ribs 25 are uniformly and radially distributed on the bottom surface of the receiving cavity 210 at intervals. The positioning ribs 23 may be adapted to grip the aerosol-generating substrate 40 inserted into the receiving cavity 210 and/or the first through-hole 220 on one hand, and to form a longitudinally extending first air inlet channel between each two adjacent positioning ribs 23 on the other hand. The support ribs 25 serve on one side to support the aerosol-generating substrate 40 and on the other side to form a plurality of radial second air inlet passages. These second air inlet passages are in communication with the first air inlet passages respectively to facilitate ambient air being drawn into the bottom of the aerosol-generating substrate 40 and then into the aerosol-generating substrate 40 to entrain aerosol generated by microwave heating.

The receiving portion 21 may be cylindrical in some embodiments, and may have an outer diameter smaller than an inner diameter of the outer conductor unit 11. The receiving portion 21 may comprise an axial receiving cavity 210, the receiving cavity 210 being adapted to receive the aerosol-generating substrate 40. The fixing portion 22 may be annular and coaxially coupled with the receiving portion 21. The fixing portion 22 may be coaxially plugged in the first opening 110 of the outer conductor unit 11 to coaxially fix the receiving portion 21 in the microwave resonator 10. The fixing portion 22 includes an axial first through hole 220 for communicating the housing 210 with the environment, such that the aerosol-generating substrate 40 can be placed in the housing 210 through the first through hole 220.

The receiving portion 21 may be cylindrical in some embodiments, and includes a flat third bottom wall 211 and a cylindrical third side wall 212 surrounding the periphery of the third bottom wall 211, wherein the outer diameter of the third side wall 212 is smaller than the inner diameter of the outer conductor unit 11. In some embodiments, the third bottom wall 211 abuts just against the top of the first conductor tray 123 when the housing receptacle 20 is assembled to the outer conductor unit 11.

In this embodiment, the receiving portion 21 further includes a second through hole 26 provided in the third bottom wall 211. Specifically, the second through hole 26 is formed through the third bottom wall 211 in the axial direction; preferably, the second through hole 26 is formed in the middle of the third bottom wall 211. It is understood that the top of the hollow probe 1221 of the probe device 122, i.e. the end thereof far away from the first conductor disc 123, is inserted into the housing seat 20 through the second through hole 26; and the bottom end of the hollow probe 1221 is embedded in the inner conductor unit 12, so that the top end of the hollow probe 1221 can be suspended in the accommodating cavity 210 of the accommodating seat 20.

As further shown in fig. 5, the microwave feeding device 30 may be a coaxial connector in some embodiments, and may be connected to a microwave source (not shown) disposed outside the outer conductor unit 11 to feed microwaves into the cavity.

In particular, fig. 5 shows an aerosol-generating device 1 according to embodiment 1 of the invention, the microwave feedthrough 30 in this embodiment may comprise an inner conductor 31, an outer conductor 33, and a dielectric layer 32 between the inner conductor 31 and the outer conductor 33. When the microwave feeding device 30 is mounted on the microwave resonator 10, the inner conductor 31 thereof is in ohmic contact with the inner wall surface of the outer conductor unit 11 and/or the outer surface of the conductor post 121 of the inner conductor unit 12, and the outer conductor 33 thereof is in ohmic contact with the surface of the outer conductor unit 11, so as to feed the microwave into the microwave resonator 10.

In this embodiment, the inner conductor 31 of the feeding-in device 30 is in a straight line shape, and when the feeding-in device 30 is installed on the microwave resonator 10, the inner conductor 31 is in ohmic contact with the surface of the conductive post 121 and is perpendicular to the axis of the conductive post 121.

Fig. 7 shows another aerosol generating device 1 according to embodiment 2 of the present invention, which has substantially the same structure as the aerosol generating device 1 described above, except that the microwave feedthrough 30 of the aerosol generating device 1 described above is replaced by a second microwave feedthrough 30 a.

As shown in fig. 7, the second microwave feedthrough 30a may be a coaxial connector that may include a second inner conductor 31a, a second outer conductor 33a, and a second dielectric layer 32a interposed between the second inner conductor 31a and the second outer conductor 33 a. When the second microwave feeding device 30a is installed on the microwave resonator 10, its second inner conductor 31a is in ohmic contact with the inner wall surface of the outer conductor unit 11, and its second outer conductor 33a is in ohmic contact with the surface of the outer conductor unit 11, so as to feed microwaves into the microwave resonator 10.

The second inner conductor 31a of the second microwave feedthrough 30a is L-shaped in this embodiment and may include a first segment 311a perpendicular to the axis of the microwave resonator 10 and a second segment 312a parallel to the axis of the microwave resonator 10, the second segment 312a being in ohmic contact with the first end wall 112 of the outer conductor element 11.

Further, the inner conductor 31 and/or the second inner conductor 31a may be made of a conductive material such as metal in some embodiments, and preferably aluminum or copper is used as the conductive material. In other embodiments, the inner conductor 31 and/or the second inner conductor 31a may be made of a non-conductive material, but it is necessary to coat the outer wall surface with a fifth conductive layer, which is a metal-plated thin film layer, such as a gold-plated layer, a silver-plated layer, a copper-plated layer, or the like. Furthermore, in some embodiments, the inner conductor 31 and/or the second inner conductor 31a may be a coupling ring, and the outer portion of the coupling ring is a coaxial structure and can be connected to a microwave source to feed microwaves into the cavity.

It will be appreciated that, in combination with the above-described design of the microwave resonator 10 and its resonant cavity 13, the resonant frequency may be achieved in the range of 2.4-2.5GHz when the aerosol-generating substrate 40 is fitted to the aerosol-generating device 1.

The following combined experimental data, as shown in fig. 9-15, particularly demonstrate the role of the first conductor disk 123 and the top of the hollow probe 1221 in the shape of a truncated cone in the present aerosol-generating device 1:

in the following experimental data, a control variable method was used, and other structures of the aerosol-generating apparatus 1 were not changed, with the presence or absence of the first conductor disk 123, the size of the first conductor disk 123, and the shape of the top of the hollow probe 1221 as independent variables.

Fig. 9 shows a graph of the resonance frequency of the aerosol-generating device 1 of example 3, the aerosol-generating device 1 in this example differing from the aerosol-generating device 1 of example 1 described above in that the first conductor disc 123 is not provided in the outer conductor unit 11 of the aerosol-generating device 1 of example 3. As shown in fig. 9, in the case where the first conductor disc 123 is not provided, the resonance frequency of the aerosol-generating device 1 is 2.9375GHz, and S11 is-3.77 db. In this case, if the resonant frequency is to be lowered, the height of the resonant cavity 13 needs to be increased.

Fig. 10 shows a graph of the resonance frequency of the aerosol generating device 1 of example 1, and it can be seen that by providing the first conductor disc 123 within the outer conductor unit 11, the resonance frequency is 2.4375GHz and S11 is-27.75 db, with a significant reduction in frequency. The axial length of the outer conductor element 11 or its resonant cavity 13 can be successfully reduced to below 25mm while ensuring a resonant frequency between 2.4-2.5 GHz.

Fig. 11 shows a graph of the resonance frequency of the aerosol-generating device 1 in example 1-1, and the aerosol-generating device 1 in this example differs from the aerosol-generating device 1 of example 1 described above in that the diameter of the first conductor disc 123 in example 1-1 is defined as 10mm, and the inner diameter of the outer conductor unit 11 is defined as 10.6 mm. As shown in FIG. 11, in example 1-1, the resonance frequency was 2.4375GHz and S11 was-27.75 db.

Fig. 12 shows a graph of the resonance frequency of the aerosol-generating device 1 in example 1-2, and the aerosol-generating device 1 in this example differs from the aerosol-generating device 1 of example 1-1 described above in that the diameter of the first conductor disc 123 in example 1-2 is defined as 8mm, and the inner diameter of the outer conductor unit 11 is defined as 10.6 mm. As shown in FIG. 12, in example 1-2, the resonance frequency was 2.87GHz and S11 was-8.02 db.

Fig. 13 shows a graph of the resonance frequency of the aerosol-generating device 1 in examples 1 to 3, the aerosol-generating device 1 in this example differing from the aerosol-generating device 1 of examples 1 to 1 described above in that the diameter of the first conductor disc 123 in examples 1 to 3 is defined as 10.4mm and the inner diameter of the outer conductor unit 11 is defined as 10.6 mm. As shown in FIG. 13, in examples 1 to 3, the resonance frequency was 2.16GHz and S11 was-13.01 db.

In summary, by comparing the resonant frequency diagrams of embodiments 1-1, 1-2, and 1-3, it can be seen that the distance between the first conductor plate 123 and the inner wall surface of the first sidewall 111 of the outer conductor unit 11 has a large influence on the resonant frequency and the feeding frequency. It is understood that the smaller the distance between the first conductor disc 123 and the inner wall surface of the first sidewall 111, the lower the resonance frequency.

Fig. 14 shows a microwave field distribution pattern of a partial structure of the aerosol-generating device 1 in example 4, in which the probe device 122 is above the first conductor disc 123, and the aerosol-generating device 1 in this example is different from the aerosol-generating device 1 in example 1 in that the top of the hollow probe 1221 in the aerosol-generating device 1 in example 4 is a flat-top structure. As shown in fig. 14, the microwave source power is set to 1w, and in the case that the top of the hollow probe 1221 is a flat-top structure, the strongest electric field of the microwave field is about 40385V/m.

Fig. 15 shows a microwave field distribution pattern of a partial structure of the aerosol-generating device 1 of example 1, in which the probe device 122 is above the first conductor disc 123, and the top of the hollow probe 1221 of this example is in a truncated cone structure. As shown in FIG. 15, again setting the microwave source power to 1w, the strongest electric field of the microwave field reaches about 104540V/m, while the microwave field is more focused on the top of the hollow probe 1221.

In summary, from the comparison of the microwave field distribution patterns of example 4 and example 1, it can be seen that the shape of the top of the hollow probe 1221 has a strong influence on the microwave field distribution. It is understood that when the tip of the hollow probe 1221 is sharper, the field intensity of the microwave field is larger, and the heating speed is faster; at the same time, the distribution of the microwave field can also be changed.

It is to be understood that the above-described respective technical features may be used in any combination without limitation.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An aerosol-generating device comprising a microwave resonator (10); the microwave resonator (10) comprises an outer conductor unit (11) and an inner conductor unit (12), wherein the outer conductor unit (11) is used for defining a resonant cavity (13), the inner conductor unit (12) is arranged in the outer conductor unit (12), the outer conductor unit (11) is provided with an open end and a closed end, one end of the inner conductor unit (12) is connected to the closed end of the outer conductor unit (11), and the other end of the inner conductor unit extends towards the open end of the outer conductor unit (11);

the inner conductor unit (12) comprises a conductor post (121), the conductor post (121) comprises a fixed end connected to the closed end of the outer conductor unit (11) and a free end extending towards the open end of the outer conductor unit (11);

characterized in that the inner conductor unit (12) further comprises a first conductor disc (123) in ohmic contact with the conductor post (121); the first conductor disc (123) is arranged at the free end.

2. An aerosol generating device according to claim 1, wherein the first conductor disc (123) is fixed to the free end wall.

3. An aerosol-generating device according to claim 1 in which the first conductor disc (123) is integrally formed with the conductor post (121).

4. An aerosol-generating device according to claim 1 in which the first conductor disc (123) is coaxial with the conductor post (121).

5. An aerosol generating device according to claim 1, wherein the first conductor disc (123) and the conductor post (121) are made of a metallic material;

or a third conductive layer is arranged on the surface of the first conductor disc (123), and a second conductive layer is arranged on the surface of the conductor post (121).

6. Aerosol-generating device according to claim 1, characterized in that the inner conductor unit (12) further comprises at least one second conductor disc (124) having an annular shape, the at least one second conductor disc (124) coaxially surrounding the outer circumferential wall of the conductor post (121) and being in ohmic contact with the conductor post (121).

7. An aerosol-generating device according to claim 6, wherein the at least one second conductor disc (124) is arranged below the first conductor disc (123) at a spacing axially of the conductor column (121).

8. An aerosol-generating device according to claim 1 in which the first conductor disc (123) is disc-shaped.

9. An aerosol generating device according to claim 1, wherein the first conductor disc (123) has a diameter larger than the diameter of the conductor post (121).

10. An aerosol generating device according to claim 1, wherein the inner conductor unit (12) further comprises electrically conductive probe means (122); the probe device (122) is in ohmic contact with the first conductor disc (123).

11. An aerosol-generating device according to claim 10, wherein the inner conductor unit (12) further comprises a through-going channel (1211) axially penetrating the conductor post (121) and the first conductor disc (123);

one end of the probe device (122) close to the first conductor disc (123) is inserted into the through channel (1211) and is in ohmic contact with the conductor column (121) and the first conductor disc (123).

12. The aerosol generating device of claim 10, wherein the probe device (122) comprises an electrically conductive and elongated hollow probe (1221) and a temperature measuring assembly (1222) disposed within the hollow probe (1221);

one end of the hollow probe (1221) close to the first conductor disc (123) is inserted into the first conductor disc (123) and the conductor column (121) in sequence, and the outer wall surface of the hollow probe (1221) is in ohmic contact with the first conductor disc (123) and/or the conductor column (121).

13. The aerosol generating device of claim 12, wherein the shape of the end of the hollow probe (1221) distal to the conductor post (121) comprises being planar, spherical, ellipsoidal, conical, or frustoconical.

14. The aerosol generating device of claim 12, wherein the hollow probe (1221) comprises an electrically conductive second side wall (1223) and an electrically conductive second end wall (1224);

the second side wall (1223) extends away from the end of the first conductor disc (123) in the direction of the second end wall (1224) for connection to the second end wall (1224).

15. An aerosol-generating device according to claim 14 in which the maximum diameter of the end of the second side wall (1223) remote from the first conductor disc (123) is greater than the diameter of the second end wall (1224).

16. An aerosol-generating device according to claim 14 in which the end of the second side wall (1223) remote from the first conductor disc (123) is smoothly connected to the second end wall (1224).

17. The aerosol generating device of claim 15, wherein the hollow probe (1221) further comprises a hollow passage (1226) extending axially therealong; the temperature measuring component (1222) is accommodated in the hollow channel (1226).

18. An aerosol-generating device according to claim 1 in which the microwave resonator (10) is a quarter-wave coaxial resonator.

19. An aerosol-generating device according to claim 1 further comprising a receptacle (20) for holding an aerosol-generating substrate (40); the housing seat (20) comprises a housing portion (21) arranged in the resonant cavity (13) to house an aerosol-generating substrate;

the bottom of the accommodating part (21) is attached to the top of the first conductor disc (123).

20. An aerosol-generating device comprising a quarter-wavelength coaxial resonator; the coaxial line resonator comprises a resonant cavity (13) and an inner conductor unit (12) positioned in the resonant cavity (13);

the inner conductor unit (12) comprises a conductor post (121) close to the short-circuited end (A) of the coaxial line resonator;

characterized in that the inner conductor unit (12) further comprises a first conductor disc (123) in ohmic contact with the conductor post (121); the first conductor pad (123) is disposed on top of the conductor pillar (121).

21. An aerosol generating device according to claim 20, wherein the first conductor disc (123) is disc-shaped and coaxially fixed to the top of the conductor post (121).

22. An aerosol generating device according to claim 20, wherein the first conductor disc (123) is integrally formed with the conductor post (121).

23. An aerosol generating device according to claim 20, wherein the outer diameter of the first conductor disc (123) is larger than the diameter of the conductor post (121).

24. An aerosol-generating device according to claim 20, further comprising a receptacle (20) mounted to the open end (B) of the coaxial line resonator (10);

the housing seat (20) comprises a housing portion (21) for housing an aerosol-generating substrate (40), the housing portion (21) being located in a resonant cavity (13) of the coaxial line resonator (10);

the inner conductor unit (12) further comprising a probe arrangement (122) near the open end (B), the probe arrangement (122) comprising an electrically conductive hollow probe (1221); the hollow probe (1221) is in ohmic contact with the first conductor disc (123), and an end of the hollow probe (1221) extends into the receiving portion (21) to act on an aerosol-generating substrate (40).

25. The aerosol generating device according to claim 24, wherein an end of the hollow probe remote from the conductor post (121) protrudes into the receiving portion (21); one end of the hollow probe close to the conductor post (121) is inserted into the first conductor disc (123) and the conductor post (121), and the outer wall surface of the hollow probe is connected with the first conductor disc (123) and the conductor post (121).

26. The aerosol generating device of claim 24, wherein the shape of the end of the hollow probe distal from the conductor post (121) comprises being planar, spherical, ellipsoidal, conical, or frustoconical.

27. An aerosol-generating device according to claim 24, wherein the inner conductor unit (12) further comprises at least one second conductor disc (124) having an annular shape, the at least one second conductor disc (124) coaxially surrounding the outer circumferential wall of the conductor post (121) and being in ohmic contact with the conductor post (121).

28. The aerosol generating device according to claim 27, wherein the at least one second conductor disc (124) is arranged below the first conductor disc (123) at intervals in an axial direction of the conductor column (121).