CN220545838U

CN220545838U - Heating module and aerosol generating device

Info

Publication number: CN220545838U
Application number: CN202321713891.6U
Authority: CN
Inventors: 黄河荣; 徐中立; 李永海
Original assignee: Shenzhen FirstUnion Technology Co Ltd
Current assignee: Shenzhen FirstUnion Technology Co Ltd
Priority date: 2023-06-30
Filing date: 2023-06-30
Publication date: 2024-03-01
Anticipated expiration: 2033-06-30

Abstract

The application relates to a heating module and aerosol generating device, include: a flexible circuit board; a tubular holder having an inner side with a receiving chamber for receiving at least part of an aerosol-generating article; and a helical coil coupled to and held by the tubular stent; wherein, at least one end of helical coil is connected with flexible circuit board electricity.

Description

Heating module and aerosol generating device

Technical Field

The embodiment of the application relates to the technical field of aerosol generation, in particular to a heating module and an aerosol generating device.

Background

An aerosol-generating device is a device that enables an aerosol-article (e.g., a cigarette, cigar, etc.) to be produced without combustion, the device comprising a heating assembly and a power supply module electrically connected to the heating assembly to provide power to the heating assembly.

In some aerosol-generating devices, the heating assembly comprises a helical coil formed by winding a wire, the wires at opposite ends of the helical coil respectively extending to connect with the power supply module, and at least part of the helical coil surrounds the periphery of the aerosol-product when the aerosol-product is combined with the aerosol-generating device. However, such an arrangement of the aerosol-generating device is disadvantageous for miniaturisation of the aerosol-generating device.

Disclosure of Invention

The embodiment of the application provides a heating module and an aerosol generating device, which are beneficial to miniaturizing the aerosol generating device.

The embodiment of the application provides a heating module device, include:

a flexible circuit board;

a tubular holder having an inner side with a receiving chamber for receiving at least part of an aerosol-generating article; and

a helical coil coupled to and retained by the tubular stent;

wherein, at least one end of spiral coil is connected with the flexible line way board electricity.

The embodiment of the application provides a heating module device, include:

a tubular holder having an inner side with a receiving chamber for receiving at least part of an aerosol-generating article;

a helical coil coupled to and retained by the tubular stent;

a conductive connecting piece electrically connected with the spiral coil, wherein the conductive connecting piece is provided with an overlapping area overlapping with the spiral coil; and

a magnetic field shield is located between the overlap region and the helical coil.

The embodiment of the application provides an aerosol generating device, which comprises a heating module and a power supply module;

the upper end of the accommodating cavity is open for at least partial insertion of the aerosol-generating article, and one end of the flexible circuit board is electrically connected with the spiral coil;

the power supply module comprises a power supply and a circuit board electrically connected with the power supply, wherein the other end of the flexible circuit board is electrically connected with the circuit board, and the position of the flexible circuit board electrically connected with the circuit board is located below or obliquely below the position of the flexible circuit board electrically connected with the spiral coil.

According to the heating module and the aerosol generating device, the flexible circuit board can be very thin, and the flexible circuit board is electrically connected with the spiral coil, so that the heating module is miniaturized, and the aerosol generating device is miniaturized.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

Fig. 1 is a schematic view of an aerosol-generating device according to an embodiment of the present application;

fig. 2 is a partial schematic view of an aerosol-generating device according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a conductive element in a heating module according to an embodiment of the present disclosure;

FIG. 4 is an exploded view of a heating module according to another embodiment of the present application;

FIG. 5 is a schematic diagram of a heating module according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a flexible circuit board according to an embodiment of the present application;

FIG. 7 is a schematic view of a tubular stent provided in an embodiment of the present application;

in the figure:

1. a heating module;

111. a spiral coil; 112. a flexible circuit board; 1121. a first bonding pad; 1122. a mating portion;

12. a tubular stent; 121. a receiving chamber; 122. a wire clamping part; 123. a clamping part; 1231. a circumferential groove; 1232. a longitudinal slot; 124. a convex rib;

13. a susceptor;

14. a wire;

15. a magnetic field shield;

16. an end cap;

2. a power supply module; 21. a power supply; 22. a circuit board;

3. a housing.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The terms "first," "second," "third," and the like in this application are used for descriptive purposes only and are not to be construed as indicating or implying any particular order or quantity of features in relation to importance or otherwise indicated. All directional indications (such as up, down, left, right, front, back … …) in the embodiments of the present application are merely used to explain the relative positional relationship or movement between the components under a certain specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is correspondingly changed. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may also be present therebetween. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1, an embodiment of the present application provides an aerosol-generating device that may be used to heat an aerosol-generating article such that the aerosol-generating article may generate an aerosol for inhalation.

As used herein, the term "aerosol-generating article" refers to an article comprising an aerosol-forming substrate that upon heating releases volatile compounds that can form an aerosol. The aerosol-forming substrate may be intended to be heated rather than burned to release volatile compounds that can form an aerosol. An aerosol formed by heating an aerosol-forming substrate may contain fewer known hazardous components than an aerosol produced by combustion or pyrolysis degradation of the aerosol-forming substrate. In an embodiment, the aerosol-generating article is removably coupled to the aerosol-generating device. The aerosol-generating article may be disposable or reusable.

The aerosol-forming substrate may be a solid aerosol-forming substrate. Alternatively, the aerosol-forming substrate may comprise solid and liquid components. The aerosol-forming substrate may comprise tobacco. The aerosol-forming substrate may comprise a tobacco-containing material capable of releasing a compound having a tobacco flavour or having nicotine upon heating. The aerosol-forming substrate may comprise a non-tobacco material. The aerosol-forming substrate may comprise tobacco-containing material and no tobacco-containing material.

As used herein, the term "aerosol-generating device" is a device that interfaces or interacts with an aerosol-generating article to form an inhalable aerosol. Specifically, the aerosol-generating device comprises a heating module 1 and a power supply module 2, the heating module 1 can accommodate at least part of the aerosol-generating article, the heating module 1 comprises a spiral coil 111, the spiral coil 111 can release heat or can generate a variable magnetic field, and the power supply module 2 is used for providing power for the operation of the spiral coil 111.

Referring to fig. 1 and 3, the power module 2 may include any suitable power source 21, for example a DC source, such as a battery. In one embodiment, the power source 21 is a lithium ion battery. Alternatively, the power source 21 may be a nickel metal hydride battery, a nickel cadmium battery, or a lithium-based battery, such as a lithium cobalt, lithium iron phosphate, lithium titanate, or lithium polymer battery. The power supply module 2 may further include a circuit board 22 having a control circuit, where the circuit board 22 is electrically connected to the power supply 21, and the control circuit is capable of controlling the output of the power supply 21, for example, causing the power supply 21 to output an alternating current or output a direct current, or for example, causing the power supply 21 to output a current or voltage in the form of pulses, or the like.

The control circuit may have one or more controllers thereon, the power supply 21 may be protected by the controllers, or the power output of the power supply 21 may be controlled, etc. The controller may control the overall operation of the aerosol-generating device. In detail, the controller controls not only the operation of the power supply and the heating assembly, but also the operation of other elements in the aerosol-generating device. Furthermore, the controller may determine whether the aerosol-generating device is operable by checking the status of the elements of the aerosol-generating device. The controller includes at least one microprocessor or microcontroller. The microprocessor or microcontroller may comprise an array of logic gates, or may comprise a combination of a general purpose microprocessor and a memory storing programs executable in the microprocessor.

Referring to fig. 1 and 2, the heating module 1 comprises a tubular support 12 extending in the longitudinal direction of the aerosol-generating article, the tubular support 12 having an at least partial receiving cavity 121 inside for receiving the aerosol-generating article, e.g. an aerosol-forming substrate of the aerosol-generating article may be received in the receiving cavity 121.

The helical coil 111 is bonded to the tubular stent 12 and is held by the tubular stent 12. As can be seen in fig. 5, the helical coil 111 may be wrapped around the periphery of the tubular stent 12 and the inner surface of the tubular stent 12 may define at least a partial boundary of the receiving chamber 121.

In one embodiment, the helical coil 111 may generate and release a significant amount of joule heat when electrically energized. Based on this, the spiral coil 111 may comprise a resistive material, suitable resistive materials include, but are not limited to: semiconductors, doped ceramics, conductive ceramics (e.g., molybdenum disilicide), carbon, graphite, metals, metal alloys, and composites made from ceramic materials and metal materials. Such composite materials may include doped or undoped ceramics. Examples of suitable doped ceramics include doped silicon carbide. Examples of suitable metals include titanium, zirconium, tantalum, and platinum group metals. Examples of suitable metal alloys include stainless steel, constantan (Constantan), nickel-containing alloys, cobalt-containing alloys, chromium-containing alloys, aluminum-containing alloys, titanium-containing alloys, zirconium-containing alloys, hafnium-containing alloys, niobium-containing alloys, molybdenum-containing alloys, tantalum-containing alloys, tungsten-containing alloys, tin-containing alloys, gallium-containing alloys, manganese-containing alloys, and iron-containing alloys, as well as nickel-, iron-, cobalt-based superalloys, stainless steel, iron-aluminum-based alloys, and iron-manganese-aluminum-based alloys.

Thus, the helical coil 111 is able to heat the aerosol-forming substrate in the receiving cavity 121, causing the aerosol-forming substrate to generate an aerosol.

In one embodiment, the spiral coil 111 has a smaller resistance to reduce joule heat generated by the spiral coil 111 during electrical conduction, thereby reducing the electrical energy loss of the spiral coil during electrical conduction. For example, less resistive materials include, but are not limited to: copper, copper alloys, silver alloys, gold, graphite, graphene or graphite alloys, and the like.

In this embodiment, the power supply module 2 may provide a varying current, such as an alternating current, to the spiral coil 111, thereby enabling the spiral coil 111 to generate a varying magnetic field. Based thereon, at least part of the tubular stent 12 is the susceptor; alternatively, the heating module 1 further includes a susceptor 13, the susceptor 13 being surrounded by a spiral coil 111: in an example, as may be shown in fig. 1, at least part of the susceptor 13 may be arranged in the accommodating chamber 121 such that at least part of the susceptor 13 can be inserted into the interior of the aerosol-forming substrate when the aerosol-forming substrate is accommodated in the accommodating chamber 121; in an example, the susceptor is arranged in an air inlet channel of the aerosol-generating device for heating at least part of the air flowing through the air inlet channel, wherein the air inlet channel provides a passage for air outside the aerosol-generating device into the receiving cavity, such that the air heated by the susceptor is able to enter the interior of the aerosol-forming substrate and heat the aerosol-forming substrate inside the aerosol-forming substrate; in one example, at least part of the susceptor is configured as a tube, and when the aerosol-forming substrate is accommodated in the accommodation chamber, at least part of the aerosol-forming substrate is surrounded by a tube-shaped susceptor, wherein the tube-shaped susceptor can be bonded to the tube-shaped support.

As used herein, the term "susceptor" refers to a material that can convert electromagnetic energy into heat. Eddy currents and hysteresis induced in the susceptor when located within a varying electromagnetic field can cause heating of the susceptor. In use, the susceptor is located within the varying magnetic field generated by the helical coil. The spiral coil is electrically connected with the power supply module 2, and the power supply module 2 supplies current for generating a variable magnetic field to the magnetic spiral coil. In an example, the helical coil is capable of generating a varying magnetic field between 1 and 30MHz, such as between 2 and 10MHz, such as between 5 and 7 MHz. In one example, the helical coil is capable of generating a magnetic field having a variation in field strength (H-field) of between 1 and 5kA/m, such as between 2 and 3kA/m, such as about 2.5 kA/m.

Wherein the susceptor may comprise a metal or carbon. In an example, the susceptor may include a ferromagnetic material, such as ferrite, ferromagnetic steel, or stainless steel. In one example, the susceptor comprises a nickel-iron alloy. In one example, the susceptor comprises a 400 series stainless steel, and the 400 series stainless steel comprises a 410 grade or 420 grade or 430 grade stainless steel.

In the event that the tubular stent 12 is not capable of generating heat electrically, for example in the event that the tubular stent 12 does not contain susceptors, at least part of the tubular stent 12 may be made of an insulating material, by which is meant a material having a thermal conductivity of less than 100W/(mK), preferably less than 40W/(mK) or less than 10W/(mK) at 23℃and 50% relative humidity. For example, the insulating material may be made of at least one of PAEK-like material, PI material, or PBI material, wherein the PAEK-like material includes PEEK, PEKK, PEKEKK or PEK material. Alternatively, at least part of the tubular support 12 may be made of a heat storage material, which refers to a material having a high heat capacity. The material with a high heat capacity may be a material with a specific heat capacity of at least 0.5J/(g·k), e.g. at least 0.7J/(g·k), e.g. at least 0.8J/(g·k), at 25 ℃ and constant pressure. For example, the heat storage material may include, but is not limited to, fiberglass, glass mat, ceramic, silica, alumina, carbon, and ore, or any combination thereof.

By making the tubular holder 12 at least partly of a heat insulating material or a heat accumulating material, the receiving chamber 121 is thermally insulated from the spiral coil 111, preventing the spiral coil 111 from being too hot and reducing heat transfer through the spiral coil 111 to the housing 3 of the aerosol-generating device.

The spiral coil 111 may be formed by winding the wire 14. In one example, the wire 14 is a round wire, i.e., the wire 14 may be circular in cross-section; the wire diameter of the round wire may be between 0.9mm and 1.6mm, for example the wire diameter of the round wire may be about 1.1mm. In one example, the wire 14 is a flat wire, i.e., the cross-section of the wire 14 may be rectangular; if the cross section of the wire 14 is rectangular, the wire diameter of the flat wire is the length of the short side of the rectangle, or the wire diameter of the flat wire is the thickness of the flat wire, and if the cross section of the wire 14 is square, the wire diameter of the flat wire is the side length of the square; wherein the wire diameter of the flat wire may be between 0.4mm and 1mm, for example the wire diameter of the flat wire may be about 0.6mm.

Alternatively, the spiral coil may be formed by winding a flexible wiring board. The flexible circuit board can be freely bent, rolled and folded, and can bear millions of dynamic bending without damage.

The flexible circuit board comprises a conductive layer and an insulating film, wherein the conductive layer is arranged between the two insulating films, and the conductive layer can be copper foil. Wherein the insulating film may comprise a polyimide and/or polyester material, and the thickness of the single insulating film may be between 5 μm and 250 μm, i.e. the minimum thickness of the single insulating film may be up to 5 μm, more particularly, the thickness of the single insulating film in the flexible circuit board may be about 25 μm. The conductive layer may be bonded to the insulating film by electrodeposition or plating, and may have a thickness of between 20 μm and 50 μm, for example, a thickness of about 35 μm, in order to secure good conductivity and reduce conductive resistance. Based on this, flexible circuit board can accomplish very thinly, and flexible circuit board's thickness can be less than or equal to 1mm, therefore flexible circuit board can satisfy the design needs of more small-size and higher density installation, and can arrange wantonly according to space layout requirement, consequently adopts flexible circuit board coiling to form spiral coil and helps miniaturized heating module to help reducing the peripheral size of heating module, reduce the external diameter of heating module, be favorable to realizing aerosol generating device's miniaturization. .

The flexible circuit board may include a single-layer flexible circuit board or a multi-layer flexible circuit board, the thickness of the single-layer flexible circuit board (including only one conductive layer) may be about 0.1mm, the thickness of the double-layer flexible circuit board (including two conductive layers, each of which has insulating films on opposite sides) may be about 0.2mm, the thickness of the three-layer flexible circuit board (including three conductive layers, each of which has insulating films on opposite sides) is greater than the thickness of the double-layer flexible circuit board, and so on, the more the number of layers of the flexible circuit board is, the thicker the thickness is.

In an embodiment of the present application, the thickness of the flexible circuit board may be 0.3±0.2mm, and more specifically, the thickness of the flexible circuit board may be about 0.1mm, 0.12mm, 0.15mm, or about 0.3mm.

In one embodiment, the opposite ends of the spiral coil 111 are connected to the circuit board 22 through conductive connectors, respectively, wherein the conductive connectors include a first conductive connector and a second conductive connector, and the opposite ends of the spiral coil 111 are electrically connected to the circuit board 22 through the first conductive connector and the second conductive connector, respectively. The conductive connecting members have an overlapping region overlapping with the spiral coil 111, and thus, the outer diameter or the peripheral dimension of the heating film set 1 can be affected by the thickness or the wire diameter of the first conductive connecting member and/or the second conductive connecting member, and reducing the thickness or the wire diameter of the first conductive connecting member and/or the second conductive connecting member contributes to reducing the outer diameter or the peripheral dimension of the heating film set 1.

For example, the circuit board 22 has a first connection point electrically connected to the first conductive connector and a second connection point electrically connected to the second conductive connector. The first connection point is located below or obliquely below the position where the first conductive connection member is electrically connected to the spiral coil 111. And/or the second connection point is located above or obliquely above the location where the second conductive connection member is electrically connected with the spiral coil 111. So that the conductive connection has an overlapping region thereon that overlaps the spiral coil 111.

In an example, referring to fig. 1 and 3, the upper end of the receiving chamber 121 is open for insertion of the aerosol-generating article, and the upper end of the helical coil 111 is disposed adjacent to the upper end of the receiving chamber 121. The upper end of the spiral coil 111 is electrically connected to the circuit board 22 through a first conductive connection, and the lower end of the spiral coil 111 is electrically connected to the circuit board 22 through a second conductive connection. At least a first conductive connector of the first conductive connector and the second conductive connector has an overlap region thereon that overlaps the helical coil.

In the example shown in fig. 3, at least a first conductive connection of both the first conductive connection and the second conductive connection is a flexible wiring board 112, and the flexible wiring board 112 has an overlapping region overlapping with the spiral coil thereon. The flexible wiring board 112 electrically connected to the spiral coil 111 may be the same as the flexible wiring board wound with the spiral coil described above, for example, have the same thickness.

Since the flexible circuit board 112 may be made thin, the thickness of the flexible circuit board 112 electrically connecting the spiral coil 111 and the power supply module 2 may be smaller than the wire diameter of the wire 14 for winding the spiral coil 111, or the thickness of the flexible circuit board 112 electrically connecting the spiral coil 111 and the power supply module 2 may be not greater than 1mm, or the thickness of the flexible circuit board 112 electrically connecting the spiral coil 111 and the power supply module 2 may be about 0.3±0.2mm, for example, the thickness of the flexible circuit board 112 electrically connected with the spiral coil 111 may be about 0.1mm, 0.12mm, 0.15mm, or about 0.3mm. Therefore, the spiral coil 111 is electrically connected with the flexible circuit board 112, so that the outer diameter of the heating module 1 can be reduced, the peripheral size of the heating module 1 can be reduced, the heating module 1 can be miniaturized, and the aerosol generating device can be miniaturized.

The aerosol-generating device is typically miniaturized by shrinking the size of the periphery of the aerosol-generating device, which then brings the heating module closer to the housing of the aerosol-generating device (the housing defining the surface layer of at least a partial region of the aerosol-generating device), which can lead to excessive housing temperatures. As such, miniaturization of the aerosol-generating device is hindered in order to ensure the comfort of the user holding the housing or to prevent the housing from scalding hands, resulting in that the current aerosol-generating devices still have a large size.

The inner diameter of the heating module is limited by the size of the aerosol-generating article, often the inner diameter of the heating module is determined. In the case that the inner diameter of the heating module is determined, reducing the outer diameter of the heating module or reducing the outer peripheral size of the heating module can increase the distance between the heating module and the housing of the aerosol-generating device while miniaturizing the aerosol-generating device, which is beneficial to increasing the thermal resistance of heat transfer to the housing and reducing the temperature of the surface of the housing, and helps to overcome the problem of scalding the housing of the aerosol-generating device due to miniaturization, so that the surface of the aerosol-generating device is not scalded while miniaturizing the aerosol-generating device. In addition, the size of the housing can be further reduced while a sufficient distance is ensured between the heating module and the housing of the aerosol-generating device, so that the aerosol-generating device can be further miniaturized. In an example, the spiral coil is wound by a flexible circuit board and/or is electrically connected with the power supply module by the flexible circuit board, because the size of the heating module and the peripheral size of the heating module are reduced, a redundant space between the heating module and the shell is formed while the aerosol generating device is miniaturized, and air can be filled in the redundant space, so that an air heat insulating layer is arranged between the heating module and the shell, and the problem of scalding the hand of the shell caused by miniaturization of the aerosol generating device can be solved.

In an embodiment, the heating module comprises only one flexible circuit board, a part of the flexible circuit board is wound into a spiral coil and combined on the tubular support, and two opposite ends of the flexible circuit board extend towards the power supply module respectively and are electrically connected with the power supply module respectively. Therefore, the outer peripheral dimension of the heating module and the outer diameter of the heating module can be further reduced, contributing to preventing the housing of the aerosol-generating device from scalding hands and contributing to further miniaturizing the aerosol-generating device.

In an embodiment, the flexible circuit board in the heating module comprises a first flexible circuit board and a second flexible circuit board, the first flexible circuit board is wound to form a spiral coil, and one end of the first flexible circuit board is electrically connected with the second flexible circuit board and can be electrically connected with the power supply module through the second flexible circuit board. Of course, the other end of the first flexible wiring board may be electrically connected to another second flexible wiring board. Therefore, the outer peripheral dimension of the heating module and the outer diameter of the heating module can be further reduced, contributing to preventing the housing of the aerosol-generating device from scalding hands and contributing to further miniaturizing the aerosol-generating device.

In the embodiment shown in fig. 3, the heating module includes only one flexible circuit board 112, the flexible circuit board 112 forms the first conductive connection member, the spiral coil 111 is formed by winding the wire 14, and the wire diameter of the wire 14 for winding the spiral coil 111 is larger than the thickness of the flexible circuit board 112. The second conductive connection member may be formed by extending a wire of the wound spiral coil 111 toward the circuit board 22, but is not limited thereto.

The flexible circuit board 112 electrically connected to the spiral coil 111 has a first soldering land 1121 thereon, and the first soldering land 1121 may be electrically connected to the upper end of the spiral coil 111 by soldering. The first weld disk 1121 may be located between the tubular holder 12 and the helical coil 111. At least a portion of the flexible circuit board 112 may extend in the longitudinal direction of the tubular support 12 and be located between the spiral coil 111 and the tubular support 12. At least part of the flexible circuit board 112 may extend in the longitudinal direction of the tubular support 12 and be located outside the spiral coil 111, i.e. the spiral coil 111 may be located between the tubular support 12 and the at least part of the flexible circuit board 112. The flexible circuit board 112 may further have a second bonding pad thereon, the second bonding pad being connected to a connection point on the circuit board 22 by soldering, and the flexible circuit board 112 being electrically connected to the circuit board 22 by the second bonding pad.

Referring to fig. 5 and 7, the tubular support 12 may have a wire clamping portion 122 thereon, the second conductive connector or wire 14 wound with the spiral coil 111 extends downward through the wire clamping portion 122 and is electrically connected to the circuit board 22, the wire 14 at the lower end of the spiral coil 111 is clamped by the wire clamping portion 122 when passing through the wire clamping portion 122, and the second conductive connector or wire 14 needs to be bent by about 90 ° when passing through the wire clamping portion 122, wherein the wire clamping portion 122 may include a groove to facilitate embedding the wire 14 in the wire clamping portion 122 for fixing. The wire clamping portion 122 can support the bent portion of the second conductive connector or wire 14, so that the wire clamping portion 122 can prevent the spiral coil 111 from moving downward along the tubular support 12 when the second conductive connector or wire 14 is pulled downward to electrically connect the second conductive connector or wire 14 with the circuit board 22.

In an embodiment where the power supply module 2 supplies the alternating current to the spiral coil 111, referring to fig. 1 and 2, the heating module 1 may further include a magnetic field shield 15, and the magnetic field shield 15 is circumferentially wound around the spiral coil 111 and disposed at the periphery of the spiral coil 111. The magnetic field shield 15 is used to shield or twist magnetic lines of force of the spiral coil 111 from the outside so that the magnetic field generated by the spiral coil 111 is concentrated as much as possible inside.

The magnetic field shielding member 15 may be a flexible electromagnetic shielding film, for example, may be a relatively common powder made of 30% of iron powder, 5% of nickel powder, 5% of cobalt powder and the balance of organic flexible carrier, and a film material with a thickness of 0.2mm is manufactured by adopting a film manufacturing process after heating and melting, wherein the granularity of metal particles is less than 100 nanometers and is uniformly dispersed in a plastic material, so that the magnetic field shielding performance can be realized. Or in yet another alternative implementation, the electromagnetic shielding film is an electromagnetic shielding film made of an alloy coating of nickel, chromium, aluminum, titanium, tin, indium, etc. formed on a surface by deposition, printing, spraying, etc. on a flexible substrate such as PI film, PEN film, PEI film, PC film, cloth, paper, etc. Or in yet another alternative implementation, the electromagnetic shielding film is a film of a high conductivity, high permeability metal or alloy having a relatively low thickness, such as an Al film, a copper film, a titanium film, or a deposited high permeability magnetic metal foil, such as an iron alloy foil, a cobalt alloy foil, a nickel alloy foil, or the like.

In an embodiment of the power supply module 2 for providing the ac current to the spiral coil 111, as shown in fig. 2, the wire clamping portion 122 may be disposed inside the magnetic field shielding member 15, so that the second conductive connection member or wire 14 at the lower end of the spiral coil 111 extends downward from between the magnetic field shielding member 15 and the tubular support 12, and the projections of the second conductive connection member or wire 14 at the lower end of the spiral coil 111 and the spiral coil 111 in the radial direction of the tubular support 12 may not overlap each other, so as to prevent the magnetic field generated by the ac current in the wire 14 at the lower end of the spiral coil 111 from interfering with the magnetic field generated by the ac current in the spiral coil 111, which is beneficial for reducing the power loss in the wire 14 at the lower end of the spiral coil 111.

In one embodiment of the power supply module 2 for providing ac current to the spiral coil 111, as shown in fig. 1, a part of the first conductive connector or flexible circuit board 112 may be located inside the magnetic field shield 15 and electrically connected to the upper end of the spiral coil 111 inside the magnetic field shield 15, and the first conductive connector or flexible circuit board 112 may be bent such that the part of the first conductive connector or flexible circuit board 112 extends upward from between the magnetic field shield 15 and the tubular support 12 and then extends downward outside the magnetic field shield 15. In other words, the first conductive connection member or the flexible circuit board 112 located outside the magnetic field shielding member 15 may have an overlapping area overlapping the spiral coil 111, that is, the overlapping area of the first conductive connection member or the flexible circuit board 112 and the spiral coil 111 have the same longitudinal height and the same longitudinal extension length in the longitudinal direction of the tubular support 12, or the projection of the overlapping area in the radial direction of the tubular support 12 overlaps with at least a part of the projection of the spiral coil 111 in the radial direction of the tubular support 12, the overlapping area is almost located outside the magnetic field shielding member 15, and the magnetic field shielding member 15 is located between the overlapping area and the spiral coil 111, so that the magnetic field shielding member 15 can shield the mutual influence of the magnetic field generated by the alternating current in the overlapping area and the magnetic field generated by the alternating current in the spiral coil 111, which is beneficial to reduce the electric energy loss on the flexible circuit board 112 and stabilize the inductance Q value of the spiral coil 111, wherein the inductance Q value is higher than the inductance Q value, the smaller the loss is, and the higher the efficiency is the higher the inductance Q value is when the spiral coil 111 works under the alternating current of a certain frequency.

Referring to fig. 4 and 5, the tubular support 12 is provided with a fastening portion 123, the flexible circuit board 112 is provided with a mating portion 1122, the mating portion 1122 is embedded in the fastening portion 123, and the upper end of the spiral coil 111 can be fixed by the mating of the mating portion 1122 and the fastening portion 123, i.e. the upper end of the spiral coil 111 is welded to the flexible circuit board 112, and the mating portion 1122 of the flexible circuit board 112 is embedded in the fastening portion 123, so that the upper end of the spiral coil 111 can be fixed. Meanwhile, by the mutual engagement of the engaging portion 1122 and the click portion 123, the electrical connection between the first soldering land 1121 and the upper end of the spiral coil 111 is ensured to be stable when the flexible wiring board 112 is pulled down to electrically connect the flexible wiring board 112 with the circuit board 22.

Referring to fig. 5, the fitting portion 1122 may be disposed above the first welding disk 1121 and/or the fastening portion 123 may be disposed above the spiral coil 111, so that the upper end of the spiral coil 111 can be conveniently fixed.

In an embodiment, referring to fig. 4, 6 and 7, the trim portion 123 includes a circumferential groove 1231 extending in the circumferential direction of the tubular holder 12, the fitting portion 1122 includes a main body portion a extending in the longitudinal direction of the tubular holder 12 and an ear portion B extending in the circumferential direction of the tubular holder 12, the first welding disk 1121 is provided on the main body portion a, and the ear portion B is fitted in the circumferential groove 1231 to be fixed. The circumferential groove 1231 can limit the ear B in the longitudinal direction of the tubular holder 12, prevent the ear B from moving in the longitudinal direction of the tubular holder 12, and thus prevent the first welding disk 1121 from moving in the longitudinal direction of the tubular holder 12.

More specifically, there may be two ears B, two ears B are located the opposite sides of the main body a respectively, corresponding, the circumferential groove 1231 may have two, two ears B are embedded in two circumferential grooves 1231 respectively and fixed, two ears B are matched with two circumferential grooves 1231 respectively, so that the main body a and the first welding disc 1121 are more stable, and the main body a is uniformly stressed.

The catching part 123 may further include a longitudinal groove 1232 extending in the longitudinal direction of the tubular holder 12, and the body part a may be fixed by being inserted into the longitudinal groove 1232. The longitudinal groove 1232 can limit the main body a in the lateral direction of the tubular holder 12, prevent the main body a from moving in the lateral direction of the tubular holder 12, and further prevent the first welding disk 1121 from moving in the lateral direction of the tubular holder 12.

The clamping portion 123 may include a dovetail groove, at least a part of the mating portion 1122 is embedded in the dovetail groove to fix, the dovetail groove can limit the mating portion 1122 in the radial direction of the tubular bracket 12, prevent the mating portion 1122 from moving in the radial direction of the tubular bracket 12, and further prevent the first welding disk 1121 from moving in the radial direction of the tubular bracket 12. Wherein the circumferential groove 1231 and/or the longitudinal groove 1232 may be configured in the shape of a dovetail groove.

Referring to fig. 1 and 2, the heating module 1 may further include an end cap 16 connected to the tubular support 12, the end cap 16 having an insertion opening communicating with the receiving cavity 121, through which the aerosol-generating article enters the receiving cavity 121; at least a portion of the mating portion 1122 may be located between the tubular support 12 and the end cap 16, with the purpose of limiting the mating portion 1122 in the radial direction of the tubular support 12 by the end cap 16, preventing movement of the mating portion 1122 in the radial direction of the tubular support 12.

Referring to fig. 2, the end cap 16 is snap-fitted to the tubular support 12, so that the end cap 16 can be assembled after the fitting portion 1122 and the fastening portion 123 are fitted to each other, so that the end cap 16 is connected to the tubular support 12. Specifically, referring to fig. 2 and 7, the tubular support 12 has ribs 124 extending radially from the tubular support 12, and the end cover 16 has grooves in which the ribs 124 can be inserted and fixed, so that the end cover 16 and the tubular support 12 are snapped into each other.

It should be noted that the description and drawings of the present application show preferred embodiments of the present application, but are not limited to the embodiments described in the present application, and further, those skilled in the art can make modifications or changes according to the above description, and all such modifications and changes should fall within the scope of the appended claims.

Claims

1. A heating module, comprising:

a flexible circuit board;

a helical coil coupled to and retained by the tubular stent;

2. The heating module of claim 1, wherein the flexible circuit board has a thickness less than a wire diameter of a wire around which the spiral coil is wound; or alternatively

The thickness of the flexible circuit board is less than or equal to 1mm; or alternatively

The thickness of the flexible circuit board is 0.3+/-0.2 mm.

3. A heating module according to claim 1, wherein the upper end of the receiving cavity is open for at least partial insertion of the aerosol-generating article;

the upper end of the spiral coil is adjacent to the upper end of the accommodating cavity, and the flexible circuit board comprises a first welding disc which is welded with the upper end of the spiral coil.

4. A heating module according to claim 3, wherein the tubular holder is provided with a snap-in portion, and the flexible wiring board is provided with a mating portion, the mating portion being embedded in the snap-in portion for fixation.

5. The heating module of claim 4, wherein the clip is disposed above the helical coil.

6. The heating module of claim 4, wherein the snap-fit portion comprises a dovetail groove, at least a portion of the mating portion being embedded in the dovetail groove.

7. The heating module of claim 4, wherein the clamping portion includes a circumferential groove extending in a circumferential direction of the tubular support, the mating portion includes a main body portion extending in a longitudinal direction of the tubular support and an ear portion extending in a circumferential direction of the tubular support, the first welding disk is disposed on the main body portion, and the ear portion is embedded in the circumferential groove to be fixed.

8. The heating module of claim 7, wherein there are two ears, one on each side of the main body, and two of the ears are embedded in each of the two circumferential grooves.

9. The heating module of claim 7, wherein the clip portion includes a longitudinal slot extending longitudinally of the tubular support, the body portion being embedded in the longitudinal slot.

10. The heating module of claim 4, wherein the heating module comprises an end cap coupled to the tubular support, the end cap having an insertion port therein in communication with the receiving cavity, the aerosol-generating article entering the receiving cavity through the insertion port;

at least part of the mating portion is located between the tubular support and the end cap.

11. The heating module of claim 10, wherein the end cap is snap-fit with the tubular support.

12. A heating module as claimed in claim 3, wherein the first weld pad is located between the helical coil and the tubular support.

13. The heating module of claim 1, wherein at least a portion of the flexible circuit board extends longitudinally of the tubular support and is located outside of the helical coil.

14. The heating module of claim 1, wherein at least part of the tubular support is a susceptor, or the heating module further comprises a susceptor surrounded by the helical coil, the susceptor configured to generate heat in a varying magnetic field.

15. The heating module of claim 1, further comprising a magnetic field shield, wherein the flexible circuit board has an overlap region overlapping the spiral coil, wherein the magnetic field shield is positioned between the overlap region and the spiral coil.

16. The heating module of claim 1, wherein the flexible wiring board includes an insulating film and a conductive layer disposed between two insulating films, a single layer of the insulating film having a thickness of between 5 μm and 250 μm, and a single layer of the conductive layer having a thickness of between 20 μm and 50 μm.

17. A heating module, comprising:

a helical coil coupled to and retained by the tubular stent;

18. An aerosol-generating device comprising the heating module of any of claims 1-17, and further comprising a power supply module;

the upper end of the accommodating cavity is open for at least partial insertion of the aerosol-generating article, one end of the flexible circuit board is electrically connected with the spiral coil, and an overlapping area overlapping the spiral coil is formed on the flexible circuit board;

the power supply module comprises a power supply and a circuit board electrically connected with the power supply, and the other end of the flexible circuit board is electrically connected with the circuit board.

19. An aerosol-generating device according to claim 18, further comprising a housing disposed about the periphery of the heating module, the flexible circuit board having an air insulating layer therebetween.