CN117981919A - Microwave heating assembly and aerosol generating device - Google Patents
Microwave heating assembly and aerosol generating device Download PDFInfo
- Publication number
- CN117981919A CN117981919A CN202211384855.XA CN202211384855A CN117981919A CN 117981919 A CN117981919 A CN 117981919A CN 202211384855 A CN202211384855 A CN 202211384855A CN 117981919 A CN117981919 A CN 117981919A
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- microwave heating
- heating assembly
- radiating
- conductor
- aerosol
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- 239000000443 aerosol Substances 0.000 title abstract description 10
- 239000004020 conductor Substances 0.000 claims abstract description 189
- 230000005855 radiation Effects 0.000 claims abstract description 48
- 238000009826 distribution Methods 0.000 claims description 9
- 239000000523 sample Substances 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000007769 metal material Substances 0.000 description 7
- 238000000889 atomisation Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
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- 239000003570 air Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
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- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 1
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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
- A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
- A24F40/46—Shape or structure of electric heating means
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
- A24F40/00—Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
- A24F40/40—Constructional details, e.g. connection of cartridges and battery parts
Landscapes
- Constitution Of High-Frequency Heating (AREA)
Abstract
The invention relates to a microwave heating component and an aerosol generating device, wherein the microwave heating component comprises an outer conductor unit and an inner conductor unit, and the outer conductor unit is cylindrical and comprises a closed end, an open end opposite to the closed end and a cavity formed between the closed end and the open end; the inner conductor unit is arranged in the cavity; the inner conductor unit comprises a conductor column and a radiation structure, the conductor column is arranged in the cavity and comprises a fixed end and a free end which are opposite to each other, and the fixed end is fixed on the outer conductor unit and in ohmic contact with the outer conductor unit; the radiating structure is coupled to the free end and comprises at least one radiating element having a cross-section in the shape of a fan, the at least one radiating element being arranged in correspondence of the aerosol-generating article. The radiation structure comprises at least one radiation element with a fan-shaped cross section, and is used for effectively heating the aerosol-generating product, so that the uniformity and range of a microwave field can be effectively improved, and the uniformity of heating the aerosol-generating product can be conveniently improved.
Description
Technical Field
The invention relates to the technical field of atomization, in particular to a microwave heating assembly and an aerosol generating device.
Background
The aerosol-generating device may heat and atomize the aerosol-generating article by means of microwave heating. The aerosol-generating device generally comprises a microwave heating assembly which may form a microwave interaction zone capable of delivering microwave energy to an aerosol-generating article; in this process, the microwave energy distribution field determines the effectiveness of microwave heating.
Related art microwave heating assemblies, microwaves are typically fed from one end and then resonate within the atomizing chamber. Because the cavity is smaller, the electromagnetic wave distribution in the cavity is extremely uneven, and the heating uniformity is poor.
Disclosure of Invention
The invention aims to provide an improved microwave heating assembly and an aerosol generating device.
The technical scheme adopted for solving the technical problems is as follows: a microwave heating assembly is configured for use in an aerosol-generating device for heating an aerosol-generating article, comprising:
an outer conductor unit having a cylindrical shape and including a closed end, an open end opposite to the closed end, and a cavity formed between the closed end and the open end, and
An inner conductor unit arranged in the cavity, one end of the inner conductor unit is connected with the closed end of the outer conductor unit, and the other end extends towards the open end of the outer conductor unit;
The inner conductor unit includes:
a conductor post including opposite fixed and free ends, the fixed end being fixed to the outer conductor unit and in ohmic contact with the outer conductor unit; and
And the radiation structure is combined with the free end and comprises at least one radiation element with a sector-shaped cross section, and the at least one radiation element is arranged corresponding to the aerosol-generating product so as to adjust the microwave field distribution and resonance frequency of the cavity.
In some embodiments, the at least one radiating element comprises two radiating elements disposed radially symmetrically along the axis of the conductor post.
In some embodiments, the radiating element includes a body portion that extends along an axis parallel to the conductor post.
In some embodiments, the body portions of the two radiating elements are equal or unequal in length and the body portions of the two radiating elements are equal or unequal in width.
In some embodiments, the radians of the body portions of the two radiating elements are equal or unequal.
In some embodiments, at least one of the two radiating elements further comprises an extension extending along an arc having a center falling on the axis of the conductor pillar.
In some embodiments, the two radiating elements each include the extension portion thereon, the body portions of the two radiating elements are equal in length, and the extension portions provided on the two radiating elements, respectively, are equal in length.
In some embodiments, one of the two radiating elements includes the extension, the body portions of the two radiating elements being unequal in length.
In some embodiments, the at least one radiating element comprises two radiating elements, and the radiating structure further comprises an elongated probe, the three being spaced apart around the circumference of the aerosol-generating article.
In some embodiments, the two radiating elements are equal or unequal in length and the two radiating elements are equal or unequal in width.
In some embodiments, the length of the two radiating elements is equal to or different from the length of the one elongate probe.
In some embodiments, the at least one radiating element comprises three radiating elements equally spaced apart in the circumferential direction of the aerosol-generating article.
In some embodiments, the three radiating elements are equal or unequal in length and the three radiating elements are equal or unequal in width.
In some embodiments, the at least one radiating element comprises four radiating elements comprising two pairs of radiating elements of unequal length from pair to pair, the two pairs of radiating elements being alternately, evenly distributed around the circumference of the aerosol-generating article.
In some embodiments, the radiating structure further comprises a base connected to the at least one radiating element, the radiating structure being in ohmic contact with the free end of the conductor post via the base.
In some embodiments, the radiating structure further comprises a base connected to the at least one radiating element, the base being disposed on an end face of the conductor pillar opposite the aerosol-generating article.
In some embodiments, the base is integrally connected to the free end of the conductor post, and the at least one radiating element is connected to the base at one end and extends in a direction parallel to the conductor post axis and away from the conductor post at the other end.
In some embodiments, the inner conductor unit further comprises a conductor disc connected to the free end, the conductor disc having an outer diameter that is greater than the outer diameter of the conductor post and less than the inner diameter of the outer conductor unit.
In some embodiments, the radiating structure is connected to an end face of the conductor disc remote from the conductor post.
In some embodiments, the microwave heating assembly further comprises a housing comprising a housing portion for housing the aerosol-generating article, the housing portion being disposed within the cavity, the at least one radiating element being disposed in correspondence with the housing portion.
In some embodiments, the at least one radiating element extends to a sidewall of the receptacle and is in ohmic contact with the free end of the conductor post.
In some embodiments, the receptacle is cylindrical, and the at least one radiating element has a curvature corresponding to a curvature of a sidewall of the receptacle.
In some embodiments, the at least one radiating element is distributed on the inner side of the accommodating portion and is attached to the inner side wall surface of the accommodating portion.
In some embodiments, the at least one radiating element is distributed inside the housing portion with a gap between the at least one radiating element and an inner side wall surface of the housing portion.
In some embodiments, the at least one radiating element is distributed on the outer side of the accommodating portion and is attached to the outer side wall surface of the accommodating portion.
In some embodiments, the at least one radiating element is distributed outside the housing portion with a gap between the radiating element and an outer side wall surface of the housing portion.
In some embodiments, the at least one radiating element is at least partially embedded in a sidewall of the receptacle.
In some embodiments, the radiating structure is made of a conductive material or has its outer surface plated with a conductive layer.
In some embodiments, the microwave heating assembly further comprises a microwave feed unit connected to the outer conductor unit, one end of the microwave feed unit being inserted into the outer conductor unit from the outer conductor unit peripheral wall and in ohmic contact with the inner conductor unit.
In some embodiments, the microwave feed-in unit comprises an inner conductor, an outer conductor and a dielectric layer between the inner conductor and the outer conductor, wherein the inner conductor is in a shape of a straight line and is in ohmic contact with the inner conductor unit along a mode perpendicular to the axis of the inner conductor unit.
The invention also constructs an aerosol-generating device comprising the microwave heating assembly described above.
The implementation of the invention has the following beneficial effects: the inner conductor unit comprises a radiation structure, and the radiation structure comprises at least one radiation element with a fan-shaped cross section, and is used for effectively heating the aerosol-generating product, so that the uniformity and range of a microwave field can be effectively improved, and the uniformity of heating the aerosol-generating product can be conveniently improved. And through the combination change of different shapes of the radiation structure, the microwave field distribution and cavity resonant frequency adjustment function can be achieved, and therefore the atomization area optimization is facilitated.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic view of the structure of one embodiment of a microwave heating assembly of the present invention;
FIG. 2 is an exploded view of one embodiment of a microwave heating assembly of the present invention;
FIG. 3 is a cross-sectional view of one embodiment of the microwave heating assembly of the present invention having a radiating element located inside a receiving portion;
FIG. 4 is a cross-sectional view of another embodiment of the microwave heating assembly of the invention with the radiating element inside the receiving portion;
FIG. 5 is a cross-sectional view of one embodiment of the microwave heating assembly of the invention with the radiating element located outside the receiving portion;
FIG. 6 is a cross-sectional view of one embodiment of the radiating element of the present invention embedded in a receptacle;
FIG. 7 is a schematic view of a first embodiment of a radiating structure according to the present invention;
FIG. 8 is a schematic diagram of a second embodiment of a radiating structure of the present invention;
FIG. 9 is a schematic diagram of a third embodiment of a radiating structure of the present invention;
FIG. 10 is a schematic diagram of a fourth embodiment of a radiating structure of the present invention;
FIG. 11 is a schematic view of a fifth embodiment of a radiation structure of the present invention;
FIG. 12 is a schematic view of a sixth embodiment of a radiating structure according to the present invention;
FIG. 13 is a schematic view of a seventh embodiment of a radiating structure according to the present invention;
fig. 14 is a schematic structural view of an eighth embodiment of the radiation structure of the present invention.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are configured and operated in specific directions based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention, and do not indicate that the apparatus or element to be referred to must have specific directions, and thus should not be construed as limiting the present invention.
It should also be noted that unless explicitly stated or limited otherwise, terms such as "mounted," "connected," "secured," "disposed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or one or more intervening elements may also be present. The terms "first," "second," "third," and the like are used merely for convenience in describing the present invention and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby features defining "first," "second," "third," etc. may explicitly or implicitly include one or more such features. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
The present invention constructs an aerosol-generating device that heats an aerosol-generating article using microwaves to atomize the aerosol for inhalation by a user.
As shown in fig. 1 and 2, in some embodiments, the aerosol-generating device comprises a microwave heating assembly 10 and a microwave generating device (not shown), the microwave heating assembly 10 comprising an inner conductor unit 1, an outer conductor unit 2, a housing seat 3 and a microwave feed-in unit. The outer conductor unit 2 is provided with a cavity 20, and the inner conductor unit 1 is arranged in the cavity 20 of the outer conductor unit 2 and can have good ohmic contact with the outer conductor unit 2. The microwave feeding unit is used for feeding microwaves generated by the microwave generating device into the outer conductor unit 2 and the inner conductor unit 1, and the microwave heating component 10 can form a microwave field after the microwaves are fed, and the microwave field can act on the aerosol-generating article to heat the aerosol-generating article.
The microwave feed-in unit may be a coupling feed-in, and the form of the coupling feed-in may be electric coupling and magnetic coupling. One end of the microwave feed-in unit is inserted into the outer conductor unit 2 from the outer peripheral wall of the outer conductor unit 2 and is in ohmic contact with the inner conductor unit 1. In some embodiments, one side of the microwave feed-in unit is connected to the microwave generating device and connected via a coaxial connector or a microstrip line, and the other side extends into the cavity 20 and forms an ohmic contact with the cavity 20. The microwave feed unit is made of a metal material, preferably, it may be made of metallic aluminum or copper. Further, the outer surface thereof may be plated with a silver or gold coating. The microwave feed unit comprises in some embodiments an inner conductor, an outer conductor and a dielectric layer between the inner conductor and the outer conductor, the inner conductor being in the form of a line and being in ohmic contact with the inner conductor unit 1 along a direction perpendicular to the axis of the inner conductor unit 1. It is understood that the inner conductor may be L-shaped and connected to the microwave heating assembly 10.
As shown in fig. 1, the overall shape of the microwave heating assembly 10 is generally cylindrical in some embodiments, however, the microwave heating assembly 10 is not limited to cylindrical, and may be square, oval, or the like.
Referring to fig. 2 together, in some embodiments, the outer conductor unit 2 has a cylindrical shape and has a closed end 201 and an open end 202 opposite to the closed end 201, and may define a semi-closed cavity 20, the cavity 20 is located between the open end 202 and the closed end 201, the cavity 20 has a cylindrical shape, and the housing seat 3 extends into the cavity 20. In some embodiments, the cavity 20 may be a polygonal shaped cavity 20. The outer conductor unit 2 includes a conductive side portion 21 and a bottom portion 22 connected to the side portion 21, the side portion 21 is cylindrical, and a tip end of the side portion 21 is of an open structure, which forms an open end 202 of the outer conductor unit 2. The bottom 22 is closed at the bottom end of the side 21 forming a closed end 201 of the outer conductor unit 2. One end of the side part 21, which is close to the bottom part 22, is provided with a feed-in hole 23, and the feed-in hole 23 is used for installing a microwave feed-in unit therein; the feed hole 23 extends radially outwardly along the side 21 and communicates with the cavity 20. In some embodiments, the outer conductor unit 2 may be made of a metallic material. In some embodiments, the outer conductor unit 2 may be made of a non-metallic material and plated with a conductive coating on its inner or outer surface, which may include gold, silver, conductive oxide, conductive ceramic, etc.
In some embodiments, the inner conductor unit 1 is connected at one end to the closed end 201 of the outer conductor unit 2, and the inner conductor unit 1 is in ohmic contact with the closed end 201 of the outer conductor unit 2, and extends at the other end towards the open end 202 of the outer conductor unit 2. In some embodiments, the inner conductor unit 1 may be made of a metal material. In some embodiments, the inner conductor unit 1 may be made of a non-metallic material and plated with a conductive coating on its inner or outer surface, and the material of the conductive coating may include gold, silver, conductive oxide, conductive ceramic, etc.
In some embodiments, the housing seat 3 is configured to house an aerosol-generating article, and the housing seat 3 is connected to the open end 202 and includes a housing portion 30 configured to house the aerosol-generating article, the housing portion 30 being disposed within the cavity 20 of the outer conductor unit 2. The accommodating portion 30 may be cylindrical in some embodiments, and includes a bottom wall 31 and a cylindrical side wall 32 surrounding the bottom wall 31, where the outer diameter of the side wall 32 is smaller than the inner diameter of the outer conductor unit 2. A receiving cavity is formed between the bottom wall 31 and the side wall 32 of the receiving portion 30, in which the aerosol-generating article can be received.
As shown in fig. 2, the housing seat 3 further includes a plurality of elongated positioning ribs 33 in some embodiments; the positioning ribs 33 are provided at regular intervals in the circumferential direction of the inner wall surface of the housing portion 30. Each of the positioning ribs 33 extends in a direction parallel to the axis of the receiving portion 30. The positioning ribs 33 may be used to grip the aerosol-generating article inserted into the receptacle 30 in one aspect and form a longitudinally extending first air inlet channel between each adjacent positioning rib 33 in another aspect to facilitate ambient air being drawn into the bottom of the aerosol-generating article and then into the aerosol-generating article to entrain the aerosol generated by the microwave heating.
The housing seat 3 further comprises, in some embodiments, a plurality of elongated support ribs 34; the support ribs 34 are radially distributed at uniform intervals on the bottom wall 31 of the housing portion 30. It will be appreciated that the support rib 34 serves in one aspect to support the aerosol-generating article and in the other direction to form a plurality of radial secondary air inlet passages. The second air inlet channels are respectively communicated with the first air inlet channels so as to facilitate the ambient air to be sucked into the bottom of the aerosol-generating product and then enter the aerosol-generating product to carry away the aerosol generated by microwave heating.
In some embodiments, the receptacle 3 may be fixedly or removably mounted at the open end 202 of the outer conductor unit 2. When the housing seat 3 housing the aerosol-generating article is mounted in the outer conductor unit 2, the housing portion 30 may be located in a region where the microwave field is mainly formed, facilitating heating of the aerosol-generating article housed in the housing portion 30. In some embodiments, the receptacle 3 may be made of a low dielectric loss material. The low dielectric loss material includes PEEK, PTFE, PAF, microwave transparent ceramics, glass, alumina, zirconia, silica, and the like.
The inner conductor unit 1 comprises in some embodiments a conductor pillar 11 and a radiating structure 12. The conductor post 11 is disposed in the cavity 20, and an outer diameter of the conductor post 11 is smaller than an inner diameter of the outer conductor unit 2. Which comprises opposite fixed and free ends, the fixed ends being fixed to the outer conductor element 2 and in ohmic contact with the outer conductor element 2. The conductor post 11 mainly plays a role of microwave conduction, and in some embodiments, may have a cylindrical shape, and an end thereof, which is far from the open end 202 of the outer conductor unit 2, is a fixed end, may be fixedly connected to the bottom 22 of the outer conductor unit 2, and an end thereof, which is near the open end 202, is a free end, and extends toward the open end 202 of the outer conductor unit 2. In some embodiments, the fixed end of the inner conductor unit 1 is in ohmic contact with the bottom 22 of the outer conductor unit 2. In other embodiments, the fixed end of the inner conductor unit 1 is integrally connected with the bottom 22 of the outer conductor unit 2. In some embodiments, the conductor post 11 may be cylindrical. It is understood that the conductor post 11 is not limited to a cylindrical shape, but may be a polygonal body or other shapes. In some embodiments, the bottom end of the conductor post 11 is further provided with an axially extending mounting portion 111, and the mounting portion 111 may be integrally combined with the conductor post 11. The bottom 22 of the outer conductor unit 2 is provided with mounting holes 24 through which the mounting portions 111 are provided. The mounting portion 111 of the conductor post 11 may be mounted in the mounting hole 24 at the bottom 22 of the outer conductor unit 2 to fix the conductor post 11 to the outer conductor unit 2 such that a reliable ohmic contact is formed between the conductor post 11 and the outer conductor unit 2.
Referring to fig. 9-11 together, in some embodiments, the inner conductor unit 1 further comprises a conductor disc 112 for adjusting the feed frequency (step impedance). The conductor disc 112 is used for microwave conduction, and can also increase its own inductance and capacitance, and lower the resonant frequency, thereby facilitating further reduction of the size of the cavity 20. The conductor disc 112 may have a disc shape, and the conductor disc 112 is connected to the conductor post 11, in particular, the conductor disc is connected to a free end of the conductor post. The outer diameter of the conductor disc 112 is larger than the outer diameter of the conductor post 11 and smaller than the inner diameter of the outer conductor unit 2. In some embodiments, the conductor disc 112 may be sleeved outside the side of the conductor post 11 near the open end 202, and may be integrally formed or in ohmic contact with the conductor post 11. In some embodiments, the conductor disc 112 may be made of a metallic material or may be made of a non-metallic material with a conductive coating plated on the outer surface. Preferably, the conductor disc 112 may be made of aluminum alloy or copper.
A radiation structure 12 may be coupled to the free end of the conductor pillar 11, which radiation structure 12 is located outside the aerosol-generating article, which may be arranged along the end periphery of the conductor pillar 11 opposite the receptacle 3. In some embodiments, the radiating structure 12 is made of a conductive material or has its outer surface plated with a conductive layer. The radiating structure 12 comprises at least one radiating element 121 with a sector-shaped cross section, and at least one radiating element 121 is arranged corresponding to the housing seat 3 so as to adjust the microwave field distribution and resonance frequency of the cavity 20. Since most of the aerosol-generating articles are cylindrical, the radiation structure 12 of the present invention matches the shape of the aerosol-generating article, so the cross section of the radiation element 121 of the present invention may be fan-shaped to conform to the shape of the aerosol-generating article, so as to effectively heat the aerosol-generating article, and greatly improve the uniformity and range of heating of the aerosol-generating article. Of course, the radiating element 121 may have another shape such as a rectangular cross section, and is not particularly limited herein. Moreover, the microwave field is generally strongest at the top periphery of the radiating element 121 having a cross-section in the form of a fan, so that the radiating element 121 of the radiating structure 12, if approaching the top of the aerosol-generating article, can achieve preferential heating of the top of the aerosol-generating article, thereby facilitating rapid release of aerosol, i.e. facilitating an increase in the atomization rate and a reduction in the preheating time. While a different design of the length of the radiating element 121 may result in a better heating uniformity of the aerosol-generating article.
In some embodiments, the at least one radiating element 121 extends up to the side wall 32 of the receiving portion 30 of the receiving receptacle 3 and is in ohmic contact with the free end of the conductor post 11, and the radian of the at least one radiating element 121 is comparable to the radian of the side wall 32 of the receiving portion 30, so that the uniformity of the microwave field is significantly improved, facilitating improved uniformity of heating of the aerosol-generating article.
As shown in fig. 3, in some embodiments, at least one radiating element 121 of the radiating structure 12 may be located inside the side wall 32 of the accommodating portion 30 and is adhered to the inner side wall surface of the accommodating portion 30, and the at least one radiating element 121 extends from the bottom wall 31 of the accommodating portion 30 into the inner side wall surface of the accommodating portion 30. The surface area of the base 122 corresponds to the surface area of the end surface of the conductor post 11 facing the housing portion 30. In some embodiments, a receiving groove may be disposed on an inner side wall surface of the receiving portion 30, so that at least one radiating element 121 may be snapped into position, so as to be distributed on the inner side wall surface of the receiving portion 30. The bottom wall 31 of the accommodating portion 30 may be provided with a corresponding opening 311 for at least one radiation element 121 to penetrate therethrough and extend into the accommodating portion 30, and the base 122 is attached to the bottom wall 31 of the accommodating portion 30.
As shown in fig. 4, in some embodiments, at least one radiating element 121 of the radiating structure 12 may be located inside the side wall 32 of the accommodating portion 30 with a certain gap between the side wall and the inner side wall surface of the accommodating portion 30. The surface area of the base 122 is smaller than the surface area of the end surface facing the conductor post 11 and the housing portion 30, and the radiation element 121 standing in the circumferential direction of the base 122 extends into the housing portion 30 through the opening 311, and the base 122 is bonded to the bottom wall 31 of the housing portion 30.
As shown in fig. 5, in some embodiments, at least one radiating element 121 of the radiating structure 12 may be located outside the side wall 32 of the accommodating portion 30, the at least one radiating element 121 may be attached to the outer side wall surface of the accommodating portion 30, or the at least one radiating element 121 may be spaced from the outer side wall surface of the accommodating portion 30. A receiving groove may be provided on an outer wall surface of the receiving portion 30, and at least one radiating element 121 may be locked and positioned so as to be distributed on the outer wall surface of the receiving portion 30.
As shown in fig. 6, in some embodiments, at least one radiating element 121 is at least partially embedded in a sidewall 32 of the receptacle 30. The side wall 32 of the accommodating portion 30 has a certain thickness, and the side wall 32 of the accommodating portion 30 may be provided with a receptacle extending upward from one end of the bottom wall 31 of the accommodating portion 30 for inserting the at least one radiating element 121, and the receptacle may be shaped and sized to fit the at least one radiating element 121.
Referring to fig. 7-14, the radiating structure 12 in some embodiments further comprises a base 122 connected to the at least one radiating element 121, the radiating structure 12 being in ohmic contact with the free ends of the conductor pillars 11 via the base 122. At least one radiating element 121 stands on the circumference of the base 122 to more uniformly distribute the microwave field around the receiving portion 30. The surface area of the base 122 may be equal to or smaller than the surface area of the end surface of the conductor post 11 facing the housing portion 30.
In some embodiments, the base 122 may be disposed on an end surface of the conductor pillar 11 opposite to the accommodating portion 30, and may be bonded to a surface of the accommodating portion 30 facing the conductor pillar 11, and in ohmic contact with the end surface of the conductor pillar 11 opposite to the accommodating portion 30; or the base 122 is integrally formed on the end surface of the conductor post 11 opposite to the housing portion 30. In some embodiments, the base 122 is integrally connected to the free end of the conductor post 11, and at least one radiating element 121 is connected at one end to the base 122 and at the other end extends in a direction parallel to the axis of the conductor post 11 and away from the conductor post 11. In some embodiments, the base 122 may have a disc shape, a square shape, or a polygonal shape, and covers an end surface of the conductor post 11 opposite to the receiving portion 30. In some embodiments, the base 122 is integrally formed on the end face of the integrally connected conductor post 11 and conductor disc 112.
In some embodiments, each radiating element 121 having a fan-shaped cross-section includes a body portion 1211, the body portion 1211 extending along an axis parallel to the conductor post 11, and the body portion 1211 having a fan-shaped cross-section.
Fig. 7 is a schematic structural view of a first embodiment of the radiation structure of the present invention, in which the number of radiation elements 121 having a fan-shaped cross section is one, and the microwave field is strongest around the one radiation element 121, and becomes smaller as the distance from the radiation element 121 increases. The region of the aerosol-generating article corresponding to the radiating element 121 preferentially generates aerosol. The length and width of the one radiating element 121 may be adjusted according to the actual situation, and likewise, the radian of the cross-sectional fan shape thereof may be adjusted according to the actual situation.
Fig. 8 is a schematic structural view of a second embodiment of the radiation structure of the present invention, in which the number of radiation elements 121 having a fan-shaped cross section is two, which may be radially symmetrically arranged along the axis of the conductor post. In some embodiments, the two radiating elements 121 may be symmetrically distributed in the circumference of the sidewall 32 of the accommodating portion 30. Of course, the two radiation elements 121 may be distributed at intervals in the circumferential direction of the side wall 32 of the housing portion 30.
In some embodiments, the body portions 1211 of the two radiating elements 121 may be equal or unequal in length, and the widths of the body portions 1211 of the two radiating elements 121 may be equal or unequal. In some embodiments, the radians of the body portions 1211 of the two radiating elements 121 may be equal or unequal. That is, the two radiating elements 121 may have equal widths, equal lengths, unequal widths, unequal lengths, and combinations thereof according to the actual situation, and are not limited herein.
Fig. 9 is a schematic structural view of a third embodiment of the radiation structure of the present invention, in which at least one of the two radiation elements 121 further includes an extension 1212, and the extension 1212 may extend along an arc having a center falling on the axis of the conductor pillar 11. The extension may extend along at least one end of the circular arc, and preferably the extension extends along both ends of the circular arc, respectively.
The cross section of the extension 1212 is fan-shaped and the cross section of the extension 1212 is larger than the cross section of the body portion 1211. The extension 1212 is parallel to the radial upper and lower end surfaces of the conductor disc 112, and its cross-sectional projection falls into the end surface of the conductor disc 112 opposite to the housing seat 3.
In some embodiments, one of the two radiating elements 121 includes an extension 1212, and the body portion 1211 of the two radiating elements 121 is unequal in length. An extension 1212 may be provided on the radiating element 121 of relatively small length of the body portion 1211 to enable microwave field deployment. In other embodiments, the two radiating elements 121 each include an extension 1212, the body portions 1211 of the two radiating elements 121 are equal in length, and the extension 1212 provided on each of the two radiating elements 121 is equal in length. In some embodiments, the extension 1212 may be provided on the end circumferential edge of the conductor disc 112 on the side remote from the conductor post 11, and the curvature of the extension 1212 may be comparable to the curvature of the circumferential side wall of the conductor disc 112.
Fig. 10 is a schematic structural diagram of a fourth embodiment of the radiation structure of the present invention, in which the radiation structure 12 includes a radiation element 121 with a fan-shaped cross section and a probe 120 with a longitudinal shape, and the two radiation elements are symmetrically distributed in the circumferential direction of the sidewall 32 of the accommodating portion 30. The length of the radiating element 121, which is fan-shaped in cross section, is greater than the length of the elongate probe.
Fig. 11 is a schematic structural diagram of a fifth embodiment of the radiation structure of the present invention, in which the radiation structure 12 includes two radiation elements 121 with fan-shaped cross sections and a probe 120 with a longitudinal shape, the three are distributed at intervals in the circumferential direction of the sidewall 32 of the accommodating portion 30, and the distribution positions of the three can be adjusted according to practical situations. The two radiating elements 121 may be equal or unequal in length, equal or unequal in width, and equal or unequal in radian. The length of the two radiating elements 121 may be equal to or different from the length of the one elongated probe 120.
Fig. 12 is a schematic structural view of a sixth embodiment of the radiation structure of the present invention, and fig. 13 is a schematic structural view of a seventh embodiment of the radiation structure of the present invention, in which the number of the radiation elements 121 with a fan-shaped cross section is three, and the three radiation elements 121 are equally spaced and distributed in the circumferential direction of the side wall 32 of the accommodating portion 30. The three radiating elements 121 may be equal or unequal in length, equal or unequal in width, and equal or unequal in radian. As shown in fig. 12, in this embodiment, the three radiating elements 121 are all equal in length. As shown in fig. 13, in this embodiment, the lengths of the three radiating elements 121 are all unequal. Of course, in other embodiments, the length of the radiating element may be adjusted according to the actual situation, which is not limited herein.
Fig. 14 is a schematic structural view of an eighth embodiment of the radiation structure of the present invention, in which the number of the radiation elements 121 with a fan-shaped cross section is four, and the four radiation elements 121 include two pairs of radiation elements 121 with different lengths from pair to pair, and the width and radian of the radiation elements 121 can be adjusted according to practical situations. The two pairs of radiation elements 121 are alternately and uniformly distributed in the circumferential direction of the side wall 32 of the housing portion 30. The microwave field in this embodiment is strongest around a pair of radiating elements 121 of relatively long length. The four radiating elements 121 provide a relatively uniform distribution of the microwave field.
In some embodiments, the radiating element 121 having a fan-shaped cross-section may be combined with the probe 120 having a longitudinal shape, the radiating element 121 having a non-fan-shaped cross-section, and the like, and may be made of a conductive material or have a conductive layer coated on the outer surface thereof. Through the combination of the different structures, the microwave field can be allocated, so that the microwave field is distributed relatively uniformly, and the atomization area optimization according to the aerosol-generating product is facilitated.
The shape and distribution of the radiation structure 12 of the present invention can greatly change the distribution form of the microwave field in the cavity 20, and further selectively heat different regions of the aerosol-generating article located in the accommodating portion 30, so that the uniformity of the microwave field is improved, and the atomization effect is effectively improved.
It is to be understood that the above examples only represent preferred embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the invention; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (31)
1. A microwave heating assembly for an aerosol-generating device for heating an aerosol-generating article, comprising:
an outer conductor unit having a cylindrical shape and including a closed end, an open end opposite to the closed end, and a cavity formed between the closed end and the open end, and
An inner conductor unit arranged in the cavity, one end of the inner conductor unit is connected with the closed end of the outer conductor unit, and the other end extends towards the open end of the outer conductor unit;
The inner conductor unit includes:
a conductor post including opposite fixed and free ends, the fixed end being fixed to the outer conductor unit and in ohmic contact with the outer conductor unit; and
And the radiation structure is combined with the free end and comprises at least one radiation element with a sector-shaped cross section, and the at least one radiation element is arranged corresponding to the aerosol-generating product so as to adjust the microwave field distribution and resonance frequency of the cavity.
2. The microwave heating assembly of claim 1, wherein the at least one radiating element comprises two radiating elements disposed radially symmetrically along an axis of the conductor post.
3. A microwave heating assembly as in claim 2 wherein the radiating element comprises a body portion extending along an axis parallel to the conductor post.
4. A microwave heating assembly as in claim 3 wherein the body portions of the two radiating elements are equal or unequal in length and the body portions of the two radiating elements are equal or unequal in width.
5. A microwave heating assembly as in claim 3 wherein the radians of the body portions of the two radiating elements are equal or unequal.
6. A microwave heating assembly in accordance with claim 3 wherein at least one of the two radiating elements further comprises an extension extending along an arc centered on the axis of the conductor post.
7. The microwave heating assembly of claim 6, wherein the extension is included on each of the two radiating elements, the body portions of the two radiating elements are equal in length, and the extension is provided on each of the two radiating elements.
8. The microwave heating assembly of claim 6, wherein one of the two radiating elements comprises the extension, the body portions of the two radiating elements being unequal in length.
9. A microwave heating assembly in accordance with claim 1, wherein the at least one radiating element comprises two radiating elements and the radiating structure further comprises an elongated probe, the three being spaced apart about the circumference of the aerosol-generating article.
10. A microwave heating assembly as in claim 9 wherein the two radiating elements are equal or unequal in length and the two radiating elements are equal or unequal in width.
11. A microwave heating assembly as in claim 9 wherein the two radiating elements are equal or unequal in length to the length of the one elongate probe.
12. A microwave heating assembly in accordance with claim 1, wherein the at least one radiating element comprises three radiating elements equally spaced apart circumferentially of the aerosol-generating article.
13. The microwave heating assembly of claim 12, wherein the three radiating elements are equal or unequal in length and the three radiating elements are equal or unequal in width.
14. A microwave heating assembly in accordance with claim 1, wherein the at least one radiating element comprises four radiating elements comprising two pairs of radiating elements of unequal length from pair to pair, the two pairs of radiating elements being alternately, evenly distributed about the circumference of the aerosol-generating article.
15. The microwave heating assembly of claim 1, wherein the radiating structure further comprises a base portion connected to the at least one radiating element, the radiating structure in ohmic contact with the free end of the conductor post via the base portion.
16. A microwave heating assembly in accordance with claim 1, wherein the radiating structure further comprises a base portion connected to the at least one radiating element, the base portion being disposed on an end face of the conductor pillar opposite the aerosol-generating article.
17. A microwave heating assembly in accordance with claim 16 wherein the base is integrally connected to the free end of the conductor post, the at least one radiating element being connected at one end to the base and at the other end extending in a direction parallel to the axis of the conductor post and away from the conductor post.
18. The microwave heating assembly of claim 1, wherein the inner conductor unit further comprises a conductor disc connected to the free end, the conductor disc having an outer diameter greater than an outer diameter of the conductor post and less than an inner diameter of the outer conductor unit.
19. A microwave heating assembly in accordance with claim 18 wherein the radiating structure is attached to an end face of the conductor disc remote from the conductor post.
20. The microwave heating assembly of claim 1, further comprising a receptacle portion for receiving an aerosol-generating article, the receptacle portion being disposed within the cavity, the at least one radiating element being disposed in correspondence with the receptacle portion.
21. The microwave heating assembly of claim 20, wherein the at least one radiating element extends to a sidewall of the receptacle and is in ohmic contact with the free end of the conductor post.
22. The microwave heating assembly of claim 20, wherein the receptacle is cylindrical and the at least one radiating element has an arc corresponding to an arc of a sidewall of the receptacle.
23. The microwave heating assembly of claim 20, wherein the at least one radiating element is disposed inside the receptacle and is in contact with an inner sidewall surface of the receptacle.
24. The microwave heating assembly of claim 20, wherein the at least one radiating element is disposed inside the receptacle with a gap between the at least one radiating element and an inside wall surface of the receptacle.
25. The microwave heating assembly of claim 20, wherein the at least one radiating element is disposed outside of the receptacle and is in contact with an outer sidewall of the receptacle.
26. The microwave heating assembly of claim 20, wherein the at least one radiating element is disposed outside of the receptacle with a gap between the at least one radiating element and an outer sidewall of the receptacle.
27. The microwave heating assembly of claim 20, wherein the at least one radiating element is at least partially embedded in a sidewall of the receptacle.
28. A microwave heating assembly as in claim 1 wherein the radiating structure is made of a conductive material or has an outer surface plated with a conductive layer.
29. The microwave heating assembly of claim 1, further comprising a microwave feed unit coupled to the outer conductor unit, wherein an end of the microwave feed unit is inserted into the outer conductor unit from the outer conductor unit peripheral wall and is in ohmic contact with the inner conductor unit.
30. The microwave heating assembly of claim 29, wherein the microwave feed unit comprises an inner conductor, an outer conductor, and a dielectric layer between the inner conductor and the outer conductor, the inner conductor being in a linear shape and in ohmic contact with the inner conductor unit along a direction perpendicular to an axis of the inner conductor unit.
31. An aerosol-generating device comprising a microwave heating assembly according to any of claims 1 to 30.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211384855.XA CN117981919A (en) | 2022-11-07 | 2022-11-07 | Microwave heating assembly and aerosol generating device |
| PCT/CN2022/133006 WO2024098454A1 (en) | 2022-11-07 | 2022-11-18 | Microwave heating assembly and aerosol generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211384855.XA CN117981919A (en) | 2022-11-07 | 2022-11-07 | Microwave heating assembly and aerosol generating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117981919A true CN117981919A (en) | 2024-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211384855.XA Pending CN117981919A (en) | 2022-11-07 | 2022-11-07 | Microwave heating assembly and aerosol generating device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN117981919A (en) |
| WO (1) | WO2024098454A1 (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4583556A (en) * | 1982-12-13 | 1986-04-22 | M/A-Com, Inc. | Microwave applicator/receiver apparatus |
| KR101424976B1 (en) * | 2012-11-08 | 2014-08-13 | 삼성전자주식회사 | Phased array RF coil for magnetic resonance imaging |
| JP6144902B2 (en) * | 2012-12-10 | 2017-06-07 | 東京エレクトロン株式会社 | Microwave radiation antenna, microwave plasma source, and plasma processing apparatus |
| CN110191530B (en) * | 2019-05-28 | 2021-10-29 | 中国电子科技集团公司第十二研究所 | Microwave radiation heating device |
| EP4265061B1 (en) * | 2020-12-18 | 2024-09-25 | Philip Morris Products S.A. | Filled resonant cavity for optimized dielectric heating |
| CN114747804A (en) * | 2022-03-23 | 2022-07-15 | 深圳麦时科技有限公司 | Aerosol generating device |
| CN114747803A (en) * | 2022-03-23 | 2022-07-15 | 深圳麦时科技有限公司 | Aerosol generating device and method for manufacturing same |
| CN114886160A (en) * | 2022-05-18 | 2022-08-12 | 深圳麦时科技有限公司 | Aerosol generating device |
-
2022
- 2022-11-07 CN CN202211384855.XA patent/CN117981919A/en active Pending
- 2022-11-18 WO PCT/CN2022/133006 patent/WO2024098454A1/en unknown
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| WO2024098454A1 (en) | 2024-05-16 |
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