CN117426555A

CN117426555A - Heating module, aerosol generating device and preparation method of heating module

Info

Publication number: CN117426555A
Application number: CN202210834638.XA
Authority: CN
Inventors: 卢志明; 胡瑞龙; 徐中立; 李永海
Original assignee: Shenzhen FirstUnion Technology Co Ltd
Current assignee: Shenzhen FirstUnion Technology Co Ltd
Priority date: 2022-07-14
Filing date: 2022-07-14
Publication date: 2024-01-23

Abstract

The application relates to a heating module, an aerosol generating device and a preparation method of the heating module, wherein a cavity is formed in an outer tube; a tubular heater for heating the aerosol-generating article to generate an aerosol, the heater being located inside the chamber; an upper end cap for providing a sealed connection between the upper end of the tubular heater and the peripheral tube; a lower end cap providing a sealed connection between the lower end of the tubular heater and the peripheral tube; the upper end cover, the lower end cover, the peripheral pipe and the tubular heater together define a first space, and the air pressure in the first space is smaller than the atmospheric pressure, or the heat conductivity coefficient of the air in the first space is smaller than the heat conductivity coefficient of the atmosphere.

Description

Heating module, aerosol generating device and preparation method of heating module

Technical Field

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

Background

The aerosol-generating device generally comprises a heater for heating the aerosol-generating article to generate an aerosol, and a power supply assembly; the power supply assembly is electrically connected to the heater by a lead for providing power to the heater to heat the aerosol-generating article.

The heater generally needs to heat the aerosol-generating article to more than 200 ℃, so that the energy consumption is high, and in order to reduce the energy consumption, a heat-insulating layer is arranged in the existing aerosol-generating device and surrounds the heater, and is used for insulating the heater and reducing the heat dissipation speed of the surface of the heater. However, the existing insulation layer still has room for improvement to ensure the insulation effect without enlarging the volume of the aerosol generating device.

Disclosure of Invention

The embodiment of the application provides a heating module, aerosol generating device and preparation method of heating module, and tubular heater participates in defining the first space that has thermal-insulated effect, helps drawing the distance between insulating layer and the tubular heater and improves the heat preservation effect to tubular heater, and has utilized the inner space of heating module more fully, is favorable to realizing heating module, aerosol generating device miniaturization.

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

a peripheral tube having a chamber formed therein;

a tubular heater for heating an aerosol-generating article to produce an aerosol, the heater being located inside the chamber;

an upper end cap providing a sealed connection between the upper end of the tubular heater and the peripheral tube;

A lower end cap providing a sealed connection between the lower end of the tubular heater and the peripheral tube;

the upper end cover, the lower end cover, the peripheral tube and the tubular heater together define a first space, and the air pressure in the first space is less than atmospheric pressure, or the thermal conductivity of the air in the first space is less than that of the atmosphere.

The embodiment of the application provides an aerosol generating device, include the heating module, still include power supply unit and electrode terminal, first space is sealed, just electrode terminal's a part is located in the first space with tubular heater electricity is connected, a part is located outside the first space with power supply unit electricity is connected.

The preparation method of the heating module provided by the embodiment of the application comprises the following steps:

assembling a peripheral tube, a tubular heater, an upper end cover and a lower end cover, so that the peripheral tube, the tubular heater, the upper end cover and the lower end cover jointly define a first space, and the peripheral tube is positioned at the periphery of the tubular heater;

injecting gas into the first space or extracting gas from the first space, so that the gas pressure in the first space is smaller than the atmospheric pressure, or the heat conductivity coefficient of the gas in the first space is smaller than the heat conductivity coefficient of the atmosphere;

Sealing the first space.

According to the heating module, the aerosol generating device and the preparation method of the heating module, the first electric connecting piece such as the detector, the sensor, the storage, the lead wire and the like is arranged between the heater and the peripheral pipe and needs to be electrically connected with the power supply assembly, so that a first space for accommodating the first electric connecting piece is arranged between the peripheral pipe and the heater, the air pressure in the first space is smaller than the atmospheric pressure, or the heat conductivity coefficient of air in the first space is smaller than the heat conductivity coefficient of the atmosphere, thereby the first space has a heat insulation effect, the heat can be preserved for the tubular heater, and the energy consumption of the heating module and the aerosol generating device can be reduced. The tubular heater participates in defining the first space, and the distance between the tubular heater and the first space with the heat insulation effect is shortened, so that the tubular heater can be further prevented from radiating, the heat insulation effect on the tubular heater is improved, the internal space of the heating module and the aerosol generating device can be fully utilized, and the heating module and the aerosol generating device are facilitated to be 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 diagram of an aerosol-generating device according to an embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a heating module according to an embodiment of the present disclosure;

FIG. 3 is a cross-sectional view of a heating module according to one embodiment of the present disclosure;

FIG. 4 is a cross-sectional view of another view of a heating module provided in an embodiment of the present application;

FIG. 5 is an exploded view of a heating module according to an embodiment of the present application;

FIG. 6 is a schematic view of a lower end cap according to one embodiment of the present disclosure;

FIG. 7 is a schematic view of an outer side of a first substrate according to an embodiment of the present disclosure;

FIG. 8 is an exploded view of a lower end cap according to one embodiment of the present application;

FIG. 9 is an exploded view of an upper end cap provided in an embodiment of the present application;

FIG. 10 is a schematic view of a tubular heater provided in an embodiment of the present application;

FIG. 11 is a schematic diagram of an air heater provided in an embodiment of the present application;

in the figure:

1. an aerosol-generating article;

2. a heating module; 21. a heater; 21a, a tubular heater; 21b, an air heater; 211. a base; 212. a second space; 213. an infrared electrothermal coating; 214. an electrode; 214a, an axial extension; 214b, a circumferential extension; 215. a first heat generating film; 216. a second heat generating film; 22. a peripheral tube; 221. an inner sidewall; 222. an outer sidewall; 223. a negative pressure layer; 224. an upper connecting wall; 225. a lower connecting wall; 23. an electrode terminal; 231. an elastic arm; 232. a support part; 233. a contact arm; 234. a straight line portion; 235. an arc-shaped portion;

24. A first electrical connection; 241. a detection unit; 242. a lead wire; 25. a first space; 26. an upper end cap; 261. a second substrate; 261a, a second interference fit; 261b, second ribs; 261c, claw; 261d, annular tube; 261e, fixed claws;

27. a lower end cap; 271. a first substrate; 271a, a first interference fit; 271b, first ribs; 271c, storage tube; 271d, fool-proof structure;

281. a first through hole; 282. a second through hole; 291. a first seal; 292. a second seal; 2921. a mounting groove; 301. a second electrical connection;

3. a power supply assembly; 31. a battery cell; 32. a controller; 33. a first conductive member; 34. a second conductive member;

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.

An embodiment of the present application provides an aerosol-generating device that may be used to heat an aerosol-generating article to volatilize aerosol from the aerosol-generating article for inhalation, the aerosol may comprise Chinese herbal medicine, nicotine or a flavoring substance such as tobacco flavor.

In the embodiment shown in fig. 1, the aerosol-generating device comprises a heating module 2 for heating the aerosol-generating article 1 to generate an aerosol, and a power supply assembly 3 for electrically connecting with the heating module 2 to provide power for the heating module 2 to heat the aerosol-generating article 1.

The aerosol generating device has a receiving cavity formed therein for receiving the heating module 2, the heating module 2 being detachably disposed in the receiving cavity, and cleaning or replacement of the heating module 2 can be facilitated by separating the heating module 2 from the receiving cavity. It is of course not excluded that in some embodiments the heating module 2 is non-detachably arranged in the receiving cavity.

Referring to fig. 2-5, the heating module 2 comprises a heater 21, and the heating module 2 heats the aerosol-generating article 1 mainly by the heater 21. The heater 21 may generate heat by electromagnetic induction under a varying magnetic field, or by the thermal effect of electrical resistance when energized, or may radiate infrared radiation to the aerosol-generating article 1 when stimulated, thereby heating the aerosol-generating article 1, such as a cigarette, and volatilizing at least one component of the aerosol-generating article 1 to form an aerosol for inhalation.

The heating module 2 may comprise a single heater 21, alternatively the heating module 2 may comprise more than one heater 21, the heater 21 or the plurality of heaters 21 may be suitably arranged to heat the aerosol-generating article 1 most effectively, wherein the plurality of heaters 21 may constitute a staged heating of the aerosol-generating article 1, wherein at least two of the plurality of heaters 21 may have different heating patterns or heating efficiencies or heating times.

The heater 21 may heat the aerosol-generating article 1 by conduction. The heater 21 may be at least partially in contact with the aerosol-generating article 21 or the aerosol-generating article 21 carrier. Alternatively, heat from the heater 21 may be conducted to the aerosol-generating article 1 by the heat conducting element.

Alternatively, the heater 21 may heat the aerosol-generating article 1 by convection; alternatively, the ambient air may be heated by at least one of the heaters 21 prior to passing through the aerosol-generating article 1, or the heater 21 is an air heater; alternatively, the heater 21 may heat the aerosol-generating article 1 by radiation.

In one embodiment, the heater 21 may have one or more, and power is supplied to the heater 21 until the one or more heaters 21 reach a temperature between about 150 ℃ and 440 ℃ in order to generate an aerosol from the aerosol-generating article 1.

The power supply assembly 3 comprises a battery core 31 and a controller 32 for controlling the power output of the battery core 31, and the controller 32 can heat the aerosol-generating article 1 to 150-440 ℃ by controlling the power output of the battery core 31 to the heating module 2.

The battery cell 31 may be a rechargeable battery cell, and may output a dc current. In other embodiments, the battery cell 31 may also be a disposable battery, which may not be rechargeable or need not be charged. When the heater 21 can generate heat by electromagnetic induction under a varying magnetic field, the heating module 2 further includes a magnetic field generator (such as an induction coil), and the controller 32 is connected to the electric core 31 and the magnetic field generator, and is configured to convert direct current output by the electric core 31 into alternating current, so that the magnetic field generator generates a varying magnetic field, and the heater 21 generates heat by magnetic induction.

In an alternative embodiment, the DC supply voltage provided by the battery 21 is in the range of 2.5V to 9.0V and the amperage of the DC current that the battery can provide is in the range of 2.5A to 20A.

The power output by the controller 32 may be supplied to the heating module as a pulse signal, and the amount of power delivered to the heating module 2 may be adjusted by varying the duty cycle or pulse width or pulse amplitude of the power signal.

In addition, the aerosol-generating device comprises an insertion detector and a user interface (e.g. a graphical display or a combination of LED indicators, etc.) that conveys information about the aerosol-generating device to a user.

The insertion detector may detect the presence and characteristics of the aerosol-generating article 1 in proximity to the heater 21 in the heat transfer path and send a signal of the presence of the aerosol-generating article 1 to the controller 32. The controller 32 may be an electronic component (e.g., microprocessor MCU, processor CPU, single-chip microcomputer, chip, etc.) disposed on a circuit board, or the controller 32 may be a portion of a circuit board (e.g., control circuitry, etc.). It will be appreciated that the provision of an insertion detector is optional and not necessary.

The controller 32 controls the user interface to display system information such as cell power, temperature, state of the aerosol-generating article, number of puffs, other information, or a combination thereof.

The controller 32 is electrically connected to the cells for controlling the current, voltage, output of electrical power or frequency, etc. of the cells, so that the temperature of the heater can be controlled.

The controller 32 may include a programmable microprocessor. In another embodiment, the controller 32 may comprise a dedicated electronic chip, such as a Field Programmable Gate Array (FPGA) or an Application Specific Integrated Circuit (ASIC). In general, any device capable of providing a signal capable of controlling the heater 32 may be used with the embodiments discussed herein. In one embodiment, the controller 32 is configured to detect a temperature change in the actual temperature of the heating module 2 relative to a target temperature to detect a suction event indicative of a user.

The controller 32 may include a storage component that may include memory and/or a buffer. The storage assembly may be configured to record changes in detected airflow or user suction. The storage component can record a count of user puffs or a time per puff. The recorded data can be displayed through a user interface under the call of the controller 32 or output and displayed through other output interfaces, when the recorded number of suction openings reaches the total number of suction openings preset by the aerosol-generating article 1, the controller 32 can be reset, or the controller can clear the recorded number of suction openings, or the controller 32 controls the aerosol-generating device to be shut down, or the controller 32 controls the battery cell 31 to stop continuously supplying power to the heating module 2, or the controller 32 prompts the user that the aerosol-generating article 1 has reached the suction limit through sound, light, vibration and the like.

User aspiration may be useful for subsequent research, device maintenance and design. The user's suction port data may be transferred to an external memory or processing device by any suitable data output device. For example, the aerosol generating device may comprise a radio, bluetooth, or Universal Serial Bus (USB) slot connected to the controller 32 or memory. Alternatively, the aerosol-generating device may be configured to transfer data from the memory to an external memory in the battery cell 31 charging device each time the aerosol-generating device is recharged via an appropriate data connection.

Further in an alternative implementation, the aerosol-generating article 1 may employ a tobacco-containing material capable of releasing volatile compounds upon heating; or may be a non-tobacco material capable of being heated and thereafter adapted for electrical heating for smoking. The aerosol-generating article 1 may employ a solid substrate comprising one or more of powders, granules, shredded strips, ribbons or flakes of one or more of vanilla leaves, tobacco leaves, homogenized tobacco, expanded tobacco; alternatively, the aerosol-generating article 1 may comprise additional tobacco or non-tobacco volatile flavour compounds to be released when the aerosol-generating article 1 is heated. In some alternative implementations, the aerosol-generating article 1 is prepared to have a conventional cigarette or cigar shape.

Further in an alternative implementation, the aerosol-generating article 1 may be comprised in a smoking article. During operation, a smoking article comprising the aerosol-generating article 1 may be fully contained within the aerosol-generating device. In this case, the user may draw on the mouthpiece of the aerosol generating device. The mouthpiece may be any part of the aerosol-generating device that is placed in the mouth of the user so as to directly inhale the aerosol generated by the aerosol-generating article or the aerosol-generating device. The aerosol is delivered into the user's mouth via the mouthpiece. Alternatively, during operation, a smoking article containing the aerosol-generating article 1 may be partially contained in the aerosol-generating device, in which case a user may draw directly on the mouthpiece of the smoking article.

Referring to fig. 2 to 5, the heating module 2 may further include a peripheral tube 22 having a chamber inside the peripheral tube 22, and the heater 21 is accommodated in the chamber such that the peripheral tube 22 is disposed around the heater 21. In an embodiment, the peripheral tube is a heat-insulating tube, and has a heat-insulating structure or is made of a heat-insulating material, so that the peripheral tube can block the heat of the heater 21 and prevent the heat from being dissipated outwards through the peripheral tube 22, thereby preserving the heat of the heater 21 and reducing the energy consumption of the heater 21.

In an embodiment, referring to fig. 3, 4 and 10, the heater 21 may be a tubular heater 21a having a second space 212 formed therein for accommodating the aerosol-generating article 1, the tubular heater 21a heating the aerosol-generating article 1 in the second space 212 by conduction or radiation to generate an aerosol. In an embodiment, the heater 21 may be an air heater 21b, the aerosol-generating article 1 being accommodated in the aerosol-generating device, the air heater 21b being located upstream of the aerosol-generating article 1, the air heater 21b being adapted to heat air to be introduced into the aerosol-generating article 1 to form high temperature air, the high temperature air being introduced into the interior of the aerosol-generating article 1, and subsequently baking the aerosol-generating article within the interior of the aerosol-generating article 1 to generate an aerosol.

In an alternative embodiment, heater 21 includes a substrate 211 and a magnetic field generator, where substrate 211 includes grade 430 stainless steel (SS 430), or grade 420 stainless steel (SS 420), or other magnetically susceptible materials that heat in a changing magnetic field, such as permalloy, such that heater 21 self-heats in the changing magnetic field due to eddy currents and hysteresis. When the heater 21 is a tubular heater 21a, the substrate 21 is a tubular substrate having a second space 212 therein, the heater 21 conducting and/or radiating heat through the tubular substrate to the aerosol-generating article 1 in the second space 212 to heat the aerosol-generating article 1; when the heater 21 is an air heater 21b, the substrate 211 may be a porous structure (e.g., honeycomb structure, porous metal, etc.), and air may pass through pores of the porous structure and be heated to form hot air while passing through the pores. A magnetic field generator (e.g. an induction coil) for generating a varying magnetic field under alternating current, and a controller 32 connected to the cell 31 and the magnetic field generator and operable to convert direct current output by the cell 31 into alternating current, optionally having a frequency of between 80KHz and 400KHz; more specifically, the frequency may be in the range of about 200KHz to 300 KHz.

In an alternative embodiment, the heater 21 has at least its outer side surface provided with or comprises a resistive material such as iron-chromium-aluminum alloy, nickel-chromium alloy, nickel-iron alloy, platinum, tungsten, silver, conductive ceramics, etc., so that when conductive, heat can be generated by the thermal effect of the resistor; of course, in other embodiments, the resistive material may be disposed on the inner side of the heater 21 or buried inside the heater 21 and may generate heat through the resistive material. When the heater 21 is a tubular heater 21a, the tubular heater 21a conducts and/or radiates heat to the aerosol-generating article 1 in the second space 212 to heat the aerosol-generating article 1; when the heater 21 is an air heater 21b, the interior of the heater 21 may have a porous structure (e.g., a honeycomb structure, a porous metal, etc.), and air may pass through pores of the porous structure and be heated to form hot air while passing through the pores, thereby heating the aerosol-generating article 1 by the hot air to volatilize at least one component of the aerosol-generating article 1 to form an aerosol. In some embodiments, the heater 21 may be made of conductive ceramic, or the heater 21 as a whole may be made of a conductive resistive material.

In an alternative embodiment, referring to fig. 10, the heater 21 includes a substrate 211 and an infrared electrothermal coating 213 disposed on the outer side of the substrate 211. Of course, in another embodiment, the infrared electrothermal coating 213 may be disposed on the inner side of the substrate 211.

The infrared electrothermal coating 213 receives electric power to generate heat, and thus generates infrared rays with a certain wavelength, for example: far infrared rays of 8-15 μm. When the wavelength of the infrared rays matches the absorption wavelength of the aerosol-generating article 1, the energy of the infrared rays is easily absorbed by the aerosol-generating article 1, thereby causing the aerosol-generating article 1 to heat up, and finally generating an aerosol.

The infrared electrothermal coating 213 is optionally formed by uniformly stirring far infrared electrothermal ink, ceramic powder and inorganic adhesive, coating on the surface of a heater, and then drying and curing for a certain time, wherein the thickness of the infrared electrothermal coating 213 is 30-50 μm; of course, the infrared electrothermal coating 213 can be formed by mixing tin tetrachloride, tin oxide, antimony trichloride, titanium tetrachloride and anhydrous copper sulfate according to a certain proportion and then coating the mixture on the outer side surface of the substrate; or one of a silicon carbide ceramic layer, a carbon fiber composite layer, a zirconium titanium oxide ceramic layer, a zirconium titanium nitride ceramic layer, a zirconium titanium boride ceramic layer, a zirconium titanium carbide ceramic layer, an iron oxide ceramic layer, an iron nitride ceramic layer, an iron boride ceramic layer, an iron carbide ceramic layer, a rare earth oxide ceramic layer, a rare earth nitride ceramic layer, a rare earth boride ceramic layer, a rare earth carbide ceramic layer, a nickel cobalt oxide ceramic layer, a nickel cobalt nitride ceramic layer, a nickel cobalt boride ceramic layer, a nickel cobalt carbide ceramic layer, or a high silicon molecular sieve ceramic layer; infrared electrothermal coating 213 can also be an existing coating of other materials.

When the heater 21 is a tubular heater 21a, the substrate 211 is a tubular substrate in which a second space for accommodating the aerosol-generating article is formed, and the tubular substrate may be transparent (e.g. made of quartz) with good infrared light transmission properties, so as to increase the radiation intensity of infrared light emitted from the infrared electrothermal coating 213 disposed on the outer side of the tubular substrate to the aerosol-generating article 1 in the second space 212, reduce energy consumption and improve the temperature raising efficiency of the aerosol-generating article 1.

The infrared electrothermal coating 213 may be disposed on an outer side of the substrate 211, the outer side of the substrate 211 facing the peripheral pipe 22, so that the infrared electrothermal coating 213 may be prevented from being corroded by aerosol, or the infrared electrothermal coating 213 may be prevented from being worn out, thereby protecting the infrared electrothermal coating 213.

In an embodiment, referring to fig. 5 and 10, the heater 21 further includes a substrate 211, a heating film disposed on an outer side surface of the substrate 211, and an electrode 214 electrically connected to the heating film, wherein the heating film may be an infrared electrothermal coating 213 or a resistive film, and may be formed on the outer side surface of the substrate 211 by thick film printing, spraying, physical deposition, chemical deposition, ion implantation, ion sputtering, or casting sheet sintering with a heating resistor, and the substrate 211 may be a tubular substrate, thereby forming the tubular heater 21a, or may have a porous structure, thereby forming the air heater 21b, and the like. Of course, in some embodiments, the heating film may be formed of a metal ring, a ring-shaped metal mesh, or the like, and the metal ring is sleeved on the outer side surface of the substrate 211.

Referring to fig. 10, the heating films include a plurality of first heating films 215 and second heating films 216, and of course, may further include a third heating film, a fourth heating film, and the like, where different heating films are disposed at different positions on the inner side and/or the outer side of the substrate 211, so as to form a plurality of different heating zones, so as to implement the segmented heating or the zonal heating of the aerosol-generating article 1. Of course, different heat generation areas can generate heat simultaneously and with the same power. A plurality of different heat generating films may be distributed along the axial direction of the base 211 so as to have different heat generating regions at different axial heights of the base 211; a plurality of different heat generating films may be distributed along the circumference of the base 211 as shown in FIG. 10 so as to have a plurality of different heat generating regions on the circumference at the same axial height of the base 211

The electrode 214 may be a silver electrode or a gold electrode, etc., and has a low resistance and a high conductivity, and the electrode 214 may be formed on the outer side surface of the substrate 211 by thick film printing, spraying, physical deposition, chemical deposition, ion implantation, ion sputtering, etc. Of course, in some embodiments, the electrode 214 may be formed of a metal ring that is disposed on the outer side of the substrate 211.

The electrode 214 includes a first electrode and a second electrode which are a positive electrode and a negative electrode each other, and each of the heat generating films is connected with the positive electrode and the negative electrode.

In the specific embodiment shown in fig. 10, the first and second heat generating films 215 and 216 extend in the axial direction of the base 211 and are circumferentially arranged on the side surface of the base 211, one side of the first heat generating film 215 and one side of the second heat generating film 216 are simultaneously electrically connected to the first electrode, and the other side of the first heat generating film 215 and the other side of the second heat generating film 216 are simultaneously electrically connected to the second electrode, so that one side of the first heat generating film 215 and the second heat generating film 216 can generate heat simultaneously. Alternatively, the first and second heat generating films 215 and 216 have the same area, the same thickness, and the same material, and thus the same heat generating efficiency, so that the heat distribution may be uniform, which may facilitate uniform heating of the aerosol-generating article 1 in the second space 212, or uniform heating of the air flowing therethrough.

In the specific embodiment shown in fig. 5 and 10, the first electrode and the second electrode are T-shaped, including an axial extension 214a and a circumferential extension 214b, the axial extension 214a extending in the axial direction of the base body 211, the circumferential extension 214b extending in the circumferential direction of the base body 211, the axial extension 214a for electrical connection with the first heat generating film 215 and the second heat generating film 216, the width of the circumferential extension 214b may be greater than the width of the axial extension 214a, and the circumferential extension 214b for electrical connection with the electrode terminal 23 (the electrode terminal 23 will be described in detail later). The circumferential extension 214b of the first electrode and the circumferential extension 214b of the second electrode may be located at the same axial height of the base body 211, but the circumferential extension 214b of the first electrode and the circumferential extension 214b of the second electrode are spaced apart from each other, so that the circumferential extension 214b of the first electrode and the circumferential extension 214b of the second electrode cannot together form a complete ring around the outer side surface of the base body 211, i.e., the radian of each circumferential extension 214b is not greater than pi/2, so that it is possible to avoid that the same electrode terminal 23 electrically connects the circumferential extension 214b of the first electrode and the circumferential extension 214b of the second electrode at the same time when the base body 211 is rotated unexpectedly, thereby causing a short circuit to occur. The smaller the curvature of the circumferential extension 214b, the greater the distance between the circumferential extension 214b of the first electrode and the circumferential extension 214b of the second electrode may be, and the less the risk of the same electrode terminal 23 electrically connecting the circumferential extension 214b of the first electrode and the circumferential extension 214b of the second electrode simultaneously upon an accidental rotation of the base body 211. In other embodiments, the circumferential extension 214b of the first electrode and the circumferential extension 214b of the second electrode may be disposed at upper and lower ends of the base 211, respectively, such as the circumferential extension 214b of the first electrode is disposed at the upper end of the base 211 and the circumferential extension 214b of the second electrode is disposed at the lower end of the base 211, so that the same electrode terminal 23 is not electrically connected to the circumferential extension 214b of the first electrode and the circumferential extension 214b of the second electrode at the same time regardless of rotation of the base 211.

Referring to fig. 4 and 5, the heating module 2 further includes a first electrical connector 24, and the first electrical connector 24 is located between the peripheral tube 22 and the heater 21, so that there is a space between the heater 21 and the peripheral tube 22, which space is a first space 25, for accommodating the first electrical connector 24. In some embodiments, the first electrical connection 24 comprises a lead, a conductive terminal, or the like for connecting the heater 21 with a conductive element of the power supply assembly 3, the power supply assembly 3 supplying power to heat the aerosol-generating article 1 to the heater 21 via the first electrical connection 25; in some embodiments, the first electrical connector 24 includes a sensor, a detector, and the like, such as a temperature sensor, and the like, and the sensor is disposed in the first space 25 for detecting corresponding data of the heater 21, such as temperature, and the sensor is communicatively connected to the controller 32, so that the sensor can transmit the corresponding data obtained by the sensor to the controller 32, so as to be a basis for determining that the controller 32 performs a certain control. In some embodiments, the first electrical connector may be a memory for storing corresponding data of the heater, such as specification data or the like.

Referring to fig. 2 to 5, the heating module 2 further includes an upper end cap 26 and a lower end cap 27, the upper end cap 26 providing a sealed connection between the upper end of the heater 21 and the peripheral tube 22 and constituting an upper end delimitation of the first space 25, the lower end cap 27 providing a sealed connection between the lower end of the heater 21 and the peripheral tube 22 and constituting a lower end delimitation of the first space 25, i.e. the first space 25 is delimited by the upper end cap 26, the lower end cap 27, the inner side wall of the peripheral tube 22 and the heater 21.

The first space 25 is a sealed space, after sealing is completed, the first space 25 is limited in gas convection with the outside, and gas convection cannot be freely carried out with the outside, so that heat in the first space 25 can be effectively reduced and dissipated due to the gas convection, the first space 25 has a heat preservation function, a heater can be preserved, and the energy consumption of a heating module is remarkably reduced.

In order to facilitate the first electrical connector 24 to be electrically connected to the power module 3 outside the first space 25, the upper end cover 26 and/or the lower end cover 27 are provided with a first through hole 281 communicating with the first space 25, and a part of the first electrical connector 24 is located in the first through hole 281 or passes through the first through hole 281, so that the power module 3 can be electrically connected to the first electrical connector 24.

Wherein in the first through hole 281, the first electrical connector 24 is in clearance fit with the first through hole 281, through which air can enter and exit the first space 25 before the first space 25 is sealed.

In one embodiment, the first via 281 is sealed, and in one embodiment, the first via 281 is filled with the first electrical connector 24 and other substances to be sealed. In an embodiment, in order to seal the first through hole 281, after the first through hole 281 is sealed, air is limited to enter the first space 25, and convection of air inside and outside the first space 25 is weakened, so that when the heater 21 generates heat, the temperature of the first space 25 cannot take away heat of the first space 25 due to high temperature air flowing out of the first space 25, and the temperature of the first space 25 cannot be reduced due to cold air entering the first space 25, so that the sealed first space 25 has a good heat preservation effect, and can preserve the heat of the heater 21 and reduce energy consumption of the heater 21.

In an embodiment, the air pressure in the first space 25 is smaller than the atmospheric pressure, or the air in the first space 25 is the air with the heat conductivity coefficient smaller than the atmospheric pressure, so that the first space 25 has a good heat insulation effect, can insulate the heater 21, and is helpful for reducing the energy consumption of the heating module 2 and the aerosol generating device.

In an embodiment, to seal the first through hole 281, in order to achieve the final step of sealing the first space 25, the heating module 2 may be placed in a negative pressure environment before sealing the first through hole 281, and the air in the first space 25 may be sucked through the gap between the first through hole 281 and the first electrical connector 24 by using a suction device, so that the air pressure in the first space 25 is lower than the atmospheric pressure, thereby forming a negative pressure. The air pressure of the negative pressure environment may be not greater than the air pressure of the first space 25. Alternatively, when the first space 25 is evacuated, the negative pressure environment may be evacuated at the same time. Alternatively, the gas in the first space 25 automatically enters the negative pressure environment through the first through hole 281. The first space 25 of negative pressure has smaller gas convection and higher thermal resistance because of rarefaction of gas, thereby having better heat preservation effect.

In an embodiment, to seal the first through hole 281, in order to achieve the final step of sealing the first space 25, before sealing the first through hole 281, a gas having a thermal conductivity smaller than that of air, such as dry argon, nitrogen or carbon dioxide, may be injected into the first space 25 through a gap between the first through hole 281 and the first electrical connector 24, that is, the first space 25 is filled with a gas having a thermal conductivity smaller than that of the atmosphere through the gap; then, the sealing operation is performed on the first through hole 281, and the air pressure of the first space 25 may be equal to or less than the air pressure, or may be greater than the air pressure. The first space 25 is filled with a gas having a thermal conductivity smaller than that of the atmosphere to increase the thermal resistance of the first space 25, thereby improving the heat-insulating effect of the first space 25 on the heater 21.

The term "atmosphere" as used herein refers to a mixed gas of nitrogen, oxygen, rare gases (helium, neon, argon, krypton, xenon, radon), carbon dioxide, and other substances (such as water vapor, impurities, etc.), wherein the volume fraction of nitrogen is about 78%, the volume fraction of oxygen is about 21%, the volume fraction of rare gases (helium, neon, argon, krypton, xenon, radon) is about 0.934%, the volume fraction of carbon dioxide is about 0.04%, and the volume fraction of other substances (such as water vapor, impurities, etc.) is about 0.002%. The thermal conductivity of the atmosphere was 0.023W/mK in the closed state at 0 ℃. Thus, in one embodiment, when the first space 25 is filled with a gas having a thermal conductivity less than atmospheric air, the thermal conductivity of the gas filled in the first space 25 is less than 0.023W/m·k in the closed state and at 0 degrees celsius. Alternatively, in an embodiment, the thermal conductivity of the gas filled in the first space 25 is less than the thermal conductivity of the atmosphere under the same altitude, closed space, temperature and humidity conditions.

It should be noted that the last step of sealing the first space 25 may be other operations than sealing the first through hole 281.

In an embodiment, referring to fig. 3 and 4, the wall of the peripheral tube 22 includes an inner sidewall 221 and an outer sidewall 222, the outer sidewall 222 is located at the periphery of the inner sidewall 221, and the outer sidewall 222 is further away from the heater 21 than the inner sidewall 221. A negative pressure layer 223 is formed between the inner sidewall 221 and the outer sidewall 222, and the air pressure in the negative pressure layer 223 is less than the atmospheric pressure.

The negative pressure layer 223 may have a lower vacuum to reduce the pressure caused by the pressure differential on the inner sidewall 221 and the outer sidewall 222.

In an embodiment, the peripheral tube 22 may be made of a metal material such as stainless steel, so that the outer sidewall 222 and the inner sidewall 221 can withstand a larger pressure difference, so that the negative pressure layer 223 may have a higher vacuum degree, thereby having a better heat insulation effect. While allowing the upper connecting wall 224 and the lower connecting wall 225 to have greater strength and less deformation.

The peripheral tube 22 further comprises a solid upper connecting wall 224 and a solid lower connecting wall 225, the upper end of the outer side wall 222 and the upper end of the inner side wall 221 are connected in a sealing manner and are connected with the upper connecting wall 224; alternatively, the upper end of the outer sidewall 222 is hermetically connected to the inner sidewall 221, and the upper end of the inner sidewall 221 constitutes an upper connecting wall 224; alternatively, the upper ends of the outer side wall 222 and the inner side wall 221 are hermetically connected, and the upper end region of the outer side wall 222 constitutes an upper connecting wall 224; alternatively, the upper end region of the outer sidewall 222 and the upper end region of the inner sidewall 221 are hermetically connected and closely contacted, so that the upper end region of the outer sidewall 222 and the upper end region of the inner sidewall 221 together constitute the upper connection wall 224.

The lower end of the outer side wall 222 is in sealing connection with the lower end of the inner side wall 221 and is in sealing connection with the lower connecting wall 225; alternatively, the lower end of the outer sidewall 222 is hermetically connected to the inner sidewall 221, and the lower end of the inner sidewall 221 constitutes a lower connecting wall 225; alternatively, the lower ends of the outer side wall 222 and the inner side wall 221 are hermetically connected, and the lower end region of the outer side wall 222 constitutes a lower connecting wall 225; alternatively, the lower end region of the outer sidewall 222 and the lower end region of the inner sidewall 221 are hermetically connected and closely contacted, so that the lower end region of the outer sidewall 222 and the lower end region of the inner sidewall 221 together constitute the lower connecting wall 225.

The thickness of the solid upper connecting wall 224 and the solid lower connecting wall 225 may be greater than the thickness of the inner side wall 221 and the outer side wall 222, thereby having greater strength. So that the upper end cap 26 is sealingly connected to the upper connecting wall 224 and the lower end cap 27 is sealingly connected to the lower connecting wall 225, the upper connecting wall 224 and the lower connecting wall 225 are not deformed.

In an embodiment, the upper and lower connection walls 224 and 225 may be made of a metal material such as stainless steel, so that the upper and lower connection walls 224 and 225 have greater strength and are less deformable.

Since the upper connection wall 224 is in direct contact with the upper end cap 26 and the lower connection wall 225 is in direct contact with the lower end cap 27, in order to reduce the heat transferred to the upper end cap 26 and the lower end cap 27 through the upper connection wall 224 and the lower connection wall 225, to prevent the upper end cap 26 and the lower end cap 27 from being damaged due to excessive heat, the wall thicknesses of the upper connection wall 224 and the lower connection wall 226 may be thinned.

At least part of the lower end cap 27 is interference fit with the peripheral tube 22 while allowing the lower end cap 27 to stably maintain connection with the peripheral tube 22. In an embodiment, referring to fig. 5 to 8, the lower end cover 27 includes a first base 271, where the first base 271 has a first interference fit portion 271a, and the first interference fit portion 271a is in interference fit with the lower connecting wall 225, and is fixedly connected through interference fit, and the first interference fit portion 271a may be pressed into the lower connecting wall 225 by riveting, so as to implement interference fit.

To achieve the interference fit, the outer diameter of the first interference fit portion 271a is larger than the inner diameter of the peripheral tube 22, for example, the outer diameter of the first interference fit portion 271a is 0.05mm to 0.5mm larger than the inner diameter of the peripheral tube 22. In order to achieve the sealing connection, the first interference fit portion 271a is looped into a circle, so that the first interference fit portion 271a achieves 360 ° full interference contact with the peripheral tube 22, and the sealing connection between the lower end cap 27 and the peripheral tube 22 is achieved.

Referring to fig. 6 and 8, the lower end cap 27 further includes a plurality of first ribs 271b, each of the first ribs 271b extending in the axial direction of the peripheral tube 22, the plurality of first ribs 271b being arranged in a discontinuous ring shape having an outer diameter equal to the outer diameter of the first interference fit portion 271a, or having a ridge on an outer side of the first rib 271b having an outer diameter equal to the outer diameter of the first interference fit portion 271 a. When the lower end cap 27 is interference-fitted with the lower connecting wall 225, the first rib 271b first enters the inside of the lower connecting wall 225 and is interference-fitted with the lower connecting wall 225, and then the first interference-fit portion 271a enters the inside of the lower connecting wall 225 and is interference-fitted with the lower connecting wall 225. The upper end outer side of the first rib 271b may have a guide slope or a guide arc surface that facilitates the entry of the first rib 271b into the interior of the lower connecting wall 225, thereby facilitating the crimping process. Providing the plurality of first ribs 271b can increase the connection tightness of the lower end cap 27 and the lower connecting wall 225, so that the lower end cap 27 and the peripheral tube 22 are fixed to each other and are difficult to separate. The plurality of first ribs 271b are provided at intervals, and help to reduce the contact area between the lower end cap 27 and the lower connecting wall 225 while ensuring the connection sealability between the lower end cap 27 and the lower connecting wall 225, thereby increasing the thermal resistance between the peripheral tube 22 and the lower end cap 27, and effectively reducing the heat transferred from the peripheral tube 22 to the lower end cap 27, thereby protecting the lower end cap 27, reducing the aging speed thereof, and reducing the damage thereto by high temperature.

Referring to fig. 5, the heater 21 is a tubular heater 21a having a second space 212 for an aerosol-generating article formed therein. The lower end cap 27 further includes a storage tube 271c, the storage tube 271c being connected to the first base 271, and a bottom of the storage tube 271c being closed by the first base 271, a top of the storage tube 271c being open and communicating with the second space 212, a storage space being formed inside the storage tube 271c for storing oil or residues from the aerosol-generating article 1. Referring to fig. 3 and 4, the storage tube 271c is at least partially disposed in the second space 212, and an upper end of the storage tube 212 can abut against a lower end of the aerosol-generating article 1 inserted into the second space 212, thereby positioning the aerosol-generating article 1.

In an embodiment, the heater 21 is a tubular heater 21a having the second space 212 for the aerosol-generating article 1 formed therein, the storage tube 271c has an outer diameter larger than an inner diameter of the heater 21, and the inner side of the heater 21 may be in contact with the outer side of the storage tube 271c and in interference fit with the storage tube 271c such that the outer side of the storage tube 271c is used to position the heater 21 such that the lower end cap 27 is secured to the heater 21.

In an embodiment, the inner diameter of the first rib 271b is smaller than the outer diameter of the heater 21, and the outer side of the heater 21 may contact the inner side of the first rib 271b and be interference fit with the first rib 271b, such that the inner side of the first rib 271b is used to position the heater 21 such that the lower cap 27 is fixed on the heater 21. In this case, the heater 21 may be a tubular heater 21a or an air heater 21b.

In one embodiment, the heater 21 is a tubular heater 21a having the second space 212 for the aerosol-generating article 1 formed therein, the outer side of the heater 21 is in interference fit with the inner side of the first rib 271b, the inner side of the heater 21 is in interference fit with the outer side of the storage tube 271c, i.e., the lower end region of the heater 21 is sandwiched between the first rib 271b and the storage tube 271c, and both are in interference fit with the first rib 271b and the storage tube 271c, such that the lower end cap 27 is secured to the heater 21.

In an embodiment, the heater 21 is a tubular heater 21a in which the second space 212 for the aerosol-generating article 1 is formed, the heater 21 being in sealing connection with the lower end cap 27 by an interference fit of its inner side surface with the outer side surface of the storage tube 271 c.

In one embodiment, as shown in fig. 6 and 8, the lower end cap 27 further includes a first seal 291, the first seal 291 being annular for providing a sealed connection between the lower end cap 27 and the heater 21.

Referring to fig. 3, 4, 6 and 8, the first seal 291 is disposed between the first rib 271b and the storage tube 271c, supported upwardly by the first base 271, and sealingly connected to the first base 271, and the lower end of the heater 21 closely abuts the first seal 291 to be sealingly connected to the first seal 291.

The first base 271, the first ribs 271b, and the storage tube 271c are integrally injection molded to form a unitary body, which in one embodiment may be integrated with the first sealing member 291 by a two-shot molding process in order to reduce the number of parts of the aerosol generating device, the unitary body being integrated with the first sealing member 291 to facilitate the increased sealability of the connection between the first sealing member 291 and the first base 271.

In an embodiment, as shown in fig. 4 and 5, the first electrical connector 24 is a sensor, specifically, a temperature sensor, and is located in the first space 25 for detecting the temperature of the heater 21, and the controller 32 can perform temperature control on the heater or perform temperature recording, anomaly detection, and the like by acquiring the temperature detected by the temperature sensor.

As shown in fig. 4 and 5, the temperature sensor contacts the outer side surface of the heater 21, and senses the temperature of the heater 21 by contact, it is of course not excluded that a non-contact temperature sensor may be used to detect the temperature of the heater 21.

In an embodiment, the temperature sensor includes a detecting portion 241 and a wire 242 connected to the detecting portion 241, the detecting portion 241 is used for detecting the temperature of the heater 21, a part of the wire 242 is located in the first through hole 281, or the wire 242 passes through the first through hole 281 to facilitate electrical connection with the controller 32, and the wire 242 is thin, or the diameter of the wire 242 is smaller than the aperture of the first through hole 281, so that not only is the wire convenient to enter the first through hole 281, but also a gap allowing air to pass through is provided between the wire 242 and the wall of the first through hole 281. Two leads 242 electrically connected to the detecting portion 241, one for connecting a positive voltage terminal and the other for connecting a negative voltage terminal, may be provided, and there may be two first through holes 282, each of which accommodates only one of the leads or allows only one of the leads to pass through. In a further embodiment, the detecting portion 241 is a metal sheet, and contacts with an insulating portion on the heater 21, and the two leads 242 are a first thermocouple wire and a second thermocouple wire made of different materials, respectively, which are electrically connected to the metal sheet, so as to constitute a thermocouple for detecting the heater with the metal sheet.

In another embodiment, the temperature detector comprises a first thermocouple wire and a second thermocouple wire, the outer side of the heater having at least partially an electrically conductive material through which the first thermocouple wire and the second thermocouple wire are electrically connected such that the first thermocouple wire and the second thermocouple wire form a thermocouple for detecting the heater with the electrically conductive material on the heater.

The first thermocouple wire and the second thermocouple wire are respectively made of different thermocouple wire materials, for example, the first thermocouple wire and the second thermocouple wire are respectively made of two different materials of thermocouple materials such as nickel, nickel-chromium alloy, nickel-silicon alloy, nickel-chromium-copper alloy, bronze, iron-chromium alloy and the like.

In an embodiment, as shown in fig. 5-8, the heating module 2 further comprises electrode terminals 23, the electrode terminals 23 being for electrically connecting the power supply assembly 3 and the heater 21, the power supply assembly 3 providing electrical power to the heater 21 for heating the aerosol-generating article 1 via the electrode terminals 23.

Referring to fig. 5 to 8, the electrode terminal 23 is fixed on the lower end cap 27, and a portion of the electrode terminal 23 is located inside the lower end cap 27 and in the first space 25 to be electrically connected with the heater 21, such as electrically connected with the resistive material on the heater 21, or electrically connected with the infrared electrothermal coating on the heater 21, or electrically connected with the magnetic field generator located in the first space 25, etc.; a portion of the electrode terminal 23 is located outside the lower cap 27 so as to be exposed to facilitate electrical connection with the power supply assembly 3.

In one embodiment, the heater 21 is a heater that generates heat by an electrothermal effect of a resistive material, or a heater that emits infrared rays to the inside of the substrate by an infrared electrothermal coating.

The electrode terminal 23 includes a support 232, an elastic arm 231, and a contact arm 233. The supporting portion 232 electrically connects the connection elastic arm 231 and the contact arm 233, and a part of the supporting portion 232 is buried in the first substrate 271 such that the electrode terminal 23 is fixed on the first substrate 271. The support portion 232 may extend in the axial direction of the peripheral tube 22, and the support portion 232 may be arc-shaped in the circumferential direction so as to conform to the heater 21 or to the shape of the outer side surface of the base body 211 of the heater 21.

The elastic arm 231 is located in the first space 25, one end of the elastic arm 231 is connected to the supporting portion 232, and the other end of the elastic arm can be a free end, and the elastic arm 231 is suspended. The middle region of the elastic arm 231 may have a protrusion or a curved arc, and the protrusion direction or the curved arc-up direction is provided toward the side surface of the heater 21 for contact with the resistive material or the electrode 214 electrically connected with the infrared electrothermal coating, so that the elastic arm 231 may be elastically electrically connected with the resistive material or the electrode of the infrared electrothermal coating. The elastic arm 231 can ensure stability of the electrical connection by elastically pressing the electrode 214.

Compared with the structure that two opposite ends of the elastic arm are connected with the supporting part and the elastic arm is bent and arched, one end of the elastic arm 231 in the embodiment is connected with the supporting part 232, and the other end of the elastic arm 231 is suspended, so that the elastic coefficient of the elastic arm 231 can be reduced, the elastic arm 231 in the embodiment can have larger deformation and smaller elastic pressing force under the same pressing force, and therefore the elastic arm is applicable to the substrate 211 made of brittle thin-wall ceramic or brittle thin-wall glass and the like, and the substrate 211 of the type can be prevented from being pressed and broken by the elastic arm 231. Of course, when the base 211 has a strong bearing force, a structure in which both opposite ends of the elastic arm 231 are connected to the supporting portion 232 and the elastic arm 231 is curved and arched may be selected.

In one embodiment, the minimum distance between the protrusion or bend on the spring arm 231 and the center of the peripheral tube 22 may be less than 0.2 mm-2 mm from the outside of the electrode 214 in electrical contact therewith to the center of the peripheral tube 22 to ensure reliable electrical contact between the spring arm 231 and the corresponding electrode 214.

In an embodiment, referring to fig. 8, the elastic arm 231 includes a linear portion 234 and an arc portion 235, wherein the linear portion 234 extends along the axial direction of the peripheral tube 22, and one end of the linear portion 234 is connected to the supporting portion 232, and the other end of the linear portion may be connected to the arc portion 235. The protrusions or curved arcs are disposed on the arc-shaped portion 235, one end of the arc-shaped portion 235 is connected to the straight line portion 234, and the other end is suspended. Compared with the whole elastic arm 231 with an arc-shaped structure, the elastic arm 231 has better elastic sensitivity, smaller elastic coefficient and larger deformation under the same force, so that the matching difficulty of the electrode terminal 23 and the electrode 214 is reduced.

Referring to fig. 8, the same supporting portion 232 may be simultaneously connected with a plurality of elastic arms 231, so as to increase the contact area with the electrode 214 through the plurality of elastic arms 231, and at the same time, in the case that the heater 21 and the lower end cover 27 are not aligned completely, at least one of the elastic arms 231 may still be electrically connected with the electrode 214, and at the same time, when the heater 21 is prevented from rotating by a certain amount, the electrode terminal 23 and the electrode 214 may still be electrically connected, thereby increasing the error tolerance of the position of the heater 21 and reducing the difficulty in assembling the heater 21 and the lower end cover 27.

Referring to fig. 7 and 8, the contact arm 233 is exposed outside the first substrate 271 so as to facilitate electrical connection with the power supply assembly 3. In order to facilitate electrical connection with the power module 3, the contact arm 233 may be sheet-shaped, having a larger contact area, so as to facilitate abutment with the corresponding second conductive member 34 on the power module 3, and to achieve electrical connection through abutment.

Referring to fig. 3, 4 and 7, the contact arm 233 may be at least partially embedded in the outer side surface of the first substrate 271, so that the contact arm can be prevented from shaking.

The electrode terminal 23 may be made of copper alloy material (such as beryllium copper, titanium copper or phosphor copper), the electrode terminal 23 may be integrally formed by punching, the thickness of the electrode terminal 23 may be 0.05-0.5 mm, and the surface of the electrode terminal 23 may be plated with gold or silver, etc. to reduce the contact resistance with the electrode 214 and the second conductive member 34, and at the same time, the corrosiveness of the surface may be increased, and the service life may be prolonged.

The metal parts of the electrode terminal 23 and the like which need to be fixed on the first substrate 271 can be embedded with the first substrate 271 by adopting an injection molding process, so that the electrode terminal 23 and the like are integrally molded with the first substrate 271 into a whole, thereby being beneficial to reducing the number of parts of the aerosol generating device, facilitating the assembly of the aerosol generating device, being beneficial to providing the assembly efficiency of the aerosol generating device, simultaneously being beneficial to realizing automatic assembly, reducing the production cost and freeing the labor force.

After the contact arm 233 is at least partially embedded in the outer side surface of the first substrate 271, the outer side of the contact arm 233 may be further subjected to a knurling or drawing process or the like to increase the bonding area of the contact arm 233 and the outer side surface of the first substrate 271.

Referring to fig. 8, the electrode terminals 23 have two, positive electrode terminals and negative electrode terminals, respectively. The elastic arms 231 of the two electrode terminals 23 may be symmetrically disposed, and the contact arms 233 of the two electrode terminals 23 may be symmetrically disposed, but not limited thereto, i.e., the contact arms 233 of the two electrode terminals 23 may be asymmetrically disposed.

In one embodiment, the heater is a heater that generates heat by electromagnetic induction of a magnetically susceptible material, including a magnetic field generator (e.g., an induction coil).

The electrode terminal may have a simple structure, and include a supporting portion and a connecting arm, and the elastic arm may be omitted, where one end of the supporting portion is located in the first space and electrically connected to the magnetic field generator, and the other end of the supporting portion is electrically connected to the connecting arm located on the outer side of the first substrate, and the connecting arm in this embodiment may be the same as the connecting arm in other embodiments.

In an embodiment, referring to fig. 7, a second electrical connector 301 is further disposed on an outer side surface of the first substrate 271, the second electrical connector 301 is located outside the first space 25 and is used for electrically connecting with the power module 3, the second electrical connector 301 may be fixed on the first substrate 271, and the second electrical connector 301 is exposed from the outer side surface of the first substrate 271 so as to be electrically connected with the power module 3. The second electrical connector 301 is simultaneously electrically connected to the first electrical connector 24, and the first electrical connector 24 is electrically connected to the power supply assembly 3 through the second electrical connector 301.

Referring to fig. 8, the second electrical connector 301 is provided with second through holes 282, the second through holes 282 are in one-to-one correspondence with the first through holes 281, the first electrical connector 24 passes through the first through holes 281 and enters the second through holes 282, or the first electrical connector 24 passes through the first through holes 281 and the second through holes 282 at the same time, the first electrical connector 24 and the second through holes 282 are in clearance fit, and before the first through holes 281 are sealed, air can enter and exit the first through holes 281 through the clearance between the first electrical connector 24 and the second through holes 282.

Therefore, after the assembly of the heating module 2 is basically completed, the first space 25 can be pumped through the gap between the second through hole 282 and the first electric connector 24 and the gap between the first through hole 281 and the first electric connector 24, or gas is injected into the first space 25 to make the first space 25 meet the preset requirement, then the first electric connector 24 and the second electric connector 301 are welded, when the first electric connector 24 and the second electric connector 301 are welded, the solder can enter the gap between the second through hole 282 and the first electric connector 24, and the gap is filled, so that the gas cannot enter and exit the first through hole 281 through the gap, and the first through hole 281 is sealed; alternatively, solder may enter the gap between the first through hole 281 and the first electrical connector 24, filling the gap, so that gas cannot enter and exit the first through hole 281 through the gap, thereby sealing the first through hole 281.

The second electrical connector 301 may be sheet-like with a large radial area to facilitate abutment with a corresponding first electrical conductor 33 on the power module 3 and to make electrical connection by abutment.

Referring to fig. 3, 4 and 7, the second electrical connector 301 is partially embedded in the first substrate 271 and partially exposed outside the first substrate 271, so that the contact arm 233 is prevented from swinging while the contact arm is not affected by the contact of the power module 3 with the second electrical connector 301.

The second electrical connector 301 may be made of copper alloy material (such as beryllium copper, titanium copper or phosphor copper, etc.), the thickness of the second electrical connector 301 may be 0.05-0.5 mm, and the surface of the second electrical connector 301 may be plated with gold or silver, etc. to reduce the contact resistance with the first conductive member 33, and at the same time, increase the corrosiveness of the surface and prolong the service life.

The second electrical connector 301 may be injection molded with the first substrate 271, so that the second electrical connector 301 and the first substrate 271 are integrally molded as one part, which is helpful for reducing the number of parts of the aerosol generating device, facilitating assembly of the aerosol generating device, and facilitating provision of assembly efficiency of the aerosol generating device, and simultaneously, is also helpful for realizing automated assembly, reducing production cost, and freeing labor.

Referring to fig. 7, the number of the second electrical connectors 301 is identical to the number of the first through holes 281. The second electrical connectors 301 may have two, and the contact arms 233 may have two, and the two second electrical connectors 301 and the two contact arms 233 may have a distance therebetween, which is greater than 0.1mm, to prevent a short circuit fault.

The two second electrical connectors 301 and the two contact arms 233 each have a wide portion, so four wide portions may be in total, and the four wide portions may be distributed in a quadrilateral shape such as a rectangle or a diamond by abutting the wide portions against corresponding conductive members in the power supply assembly, so as to form four corners of the quadrilateral shape such as the rectangle or the diamond.

In an embodiment, referring to fig. 6 to 8, the first substrate 271 further has a foolproof structure 271d, when the lower end cover 27 is assembled with the heater 21, on one hand, the lower end cover 27 can be used to position the lower end cover 27 to be assembled with the peripheral tube 22 and the heater 21 according to a correct direction, so that when the second electrical connector 301 abuts against the power module 2, it is ensured that the conductive member on the power module 2 is not staggered with the second electrical connector 301, which is helpful for realizing the abutting connection between the power module 2 and the second electrical connector 301, and on the other hand, the heating module 2 can be prevented from rotating relative to the power module 3, and the electrical connection between the power module 3 and the heating module 2 is ensured to be reliable.

The fool-proof structure 271d may be disposed on the first substrate 271, and the first substrate 271 may be irregularly shaped, such as having a notch or protrusion on one side thereof, for example, a part of one side thereof is flattened to have a plane, and the other sides are arc surfaces, etc., and for example, one side thereof has a recognizable mark, such as a pattern, color, text, two-dimensional code, etc.

In one embodiment, the first substrate 271 is configured to be foolproof, such as having an outer contour that is D-shaped, trapezoidal, scalene triangular, etc.

The lower end cap 27 may be made of a plastic material with high temperature resistance, such as: PEEK, PI, PBI, PPS and temperature-resistant PC.

In an embodiment, referring to fig. 1, the power supply assembly 3 further includes a conductive member, one end of the conductive member is electrically connected to the controller 32, and the other end of the conductive member is electrically connected to the heating module 2. In an embodiment, the conductive member may be a rigid copper pillar, and the rigid copper pillar may be electrically connected to the heating module 2 by being in rigid contact with the heating module 2, and the rigid copper pillar may not be elastically contracted when being in contact with the heating module 2. In an embodiment, the conductive member may be an elastically contractible conductive member such as a spring pin, a spring plate, or an elastic terminal, and the elastically contractible conductive member may be elastically abutted against the heating module 2, so as to be electrically connected with the heating module 2, and the elastically contractible conductive member may elastically contract when abutted against the heating module 2, so as to help to improve the stability of the electrical connection between the conductive member and the heating module 2. Thus, electrical connection between the power supply assembly 3 and the heating module 2 can be achieved without welding, riveting, or the like.

Referring to fig. 1, the conductive members include a first conductive member 33 and a second conductive member 34, the first conductive member 33 is configured to abut against a second electrical connection member 301 disposed on an outer side surface of the first substrate 271, and the second conductive member 34 is configured to abut against a connection arm 233 disposed on the outer side surface of the first substrate 271.

In an embodiment, referring to fig. 5 and 9, the upper end cap 26 includes a second base 261, the second base 261 has a second interference fit portion 261a, the second interference fit portion 261a is looped into a circle, the second interference fit portion 261a is in interference fit with the upper connection wall 224 of the peripheral tube 22 and is in sealing connection with the upper connection wall 224 through interference fit, and the second interference fit portion 261a can be pressed into the inside of the upper connection wall 224 by riveting and is in interference fit.

To achieve an interference fit and a sealed connection, the outer diameter of the second interference fit portion 261a is greater than the inner diameter of the peripheral tube 22, for example, the outer diameter of the second interference fit portion 261a is 0.05mm to 0.5mm greater than the inner diameter of the peripheral tube 22.

Referring to fig. 5 and 9, the upper end cap 26 further includes a plurality of second ribs 261b, each of the second ribs 261b extends along the axial direction of the peripheral tube 22, and the plurality of second ribs 261b are arranged in a discontinuous ring shape, and the discontinuous ring shape may have an outer diameter equal to the outer diameter of the second interference fit portion 261a, or an outer side surface of the second rib 261b has a protrusion, and the protrusion has an outer diameter equal to the outer diameter of the second interference fit portion 261 a. When the upper end cap 26 is interference-fitted with the upper connecting wall 224 of the peripheral tube 22, first, the second rib 261b enters the inside of the upper connecting wall 224 and is interference-fitted with the upper connecting wall 224, and then the second interference-fit portion 261a enters the inside of the upper connecting wall 224 and is interference-fitted with the upper connecting wall 224. The outer side of the upper end of the second rib 261b may have a guide slope or a guide arc surface that helps the second rib 261b to enter the inside of the upper connection wall 224, thereby facilitating the riveting process. Providing a plurality of second ribs 261b can increase the connection tightness of the upper end cap 26 and the upper connection wall 224, so that the upper end cap 26 and the peripheral tube 22 are fixed to each other and are difficult to separate. The plurality of second ribs 261b are provided at intervals, and help to reduce the contact area between the upper end cap 26 and the upper connecting wall 224 while ensuring the connection tightness between the upper end cap 26 and the upper connecting wall 224, thereby increasing the thermal resistance between the peripheral tube 22 and the upper end cap 26, and effectively reducing the heat transferred from the peripheral tube 22 to the upper end cap 26, thereby protecting the upper end cap 26, reducing the aging speed thereof, and reducing the damage thereto by high temperature.

In an embodiment, the second rib 261b protrudes from the second base 261 in the axial direction of the peripheral tube 22 to form a jaw 261c, the inner diameter of the jaw 261c is smaller than the outer diameter of the heater 21, and the outer side surface of the heater 21 may contact with the inner side surface of the jaw 261c and be interference fit with the jaw 261c, so that the inner side surface of the jaw 261c serves to position the heater 21 such that the upper end cap 26 is fixed on the heater 21. In this case, the heater 21 may be a tubular heater 21a or an air heater 21b.

In an embodiment, the heater 21 may be a tubular heater 21a having a second space 212 formed therein for the aerosol-generating article. The outer diameter of the second rib 261b is smaller than the inner diameter of the heater 21, and the outer side surface of the heater 21 may contact the outer side surface of the second rib 261b and be interference fit with the second rib 261b, so that the inner side surface of the second rib 261b serves to position the heater 21 such that the cap up 26 is fixed on the heater 21.

In one embodiment, upper end cap 26 further includes a second seal member 292, second seal member 292 being annular in shape to provide a sealed connection between upper end cap 26 and heater 21.

Referring to fig. 3 and 4, the second seal 292 is disposed inside the second rib 261b and supported by the second base 261, and is sealingly connected with the second base 261, and the upper end of the heater 21 closely abuts the second seal 292, thereby being sealingly connected with the second seal 292.

Referring to fig. 9, the second seal 292 may have a mounting groove 2921, the mounting groove 2921 is annular, and a groove wall on an inner side thereof may have a first notch, so that an inner side wall of the mounting groove 2921 may be discontinuous, and a groove wall on an outer side of the mounting groove 2921 may have a second notch, so that an outer side wall of the mounting groove 2921 may be discontinuous, and the first notch and the second notch are arranged in a staggered manner in a radial direction, so that the first notch and the second notch are located on different radial lines. Of course, in other embodiments, at least one of the inner and outer groove walls of the mounting groove 2921 is connected.

The upper end cap 26 further includes an annular tube 261d, the annular tube 261d is connected to the second base 261 and penetrates up and down, an insertion port into which the aerosol-generating article 1 is inserted is formed inside the annular tube 261d, and the lower end of the annular tube 261d can be fitted into the mounting groove 2921 so as to be in sealing connection with the second sealing member 292, thereby contributing to improvement of sealing reliability, and the connection strength is high, and the aerosol-generating article is not easily peeled off and damaged. When the heater 21 is a tubular heater 21a having the second space 212 formed therein, at least part of the aerosol-generating article 1 is inserted into the second space 212 through the insertion opening. When the heater 21 is an air heater 21b, the aerosol-generating device has a receiving cavity therein for receiving the aerosol-generating article 1, into which at least part of the aerosol-generating article 1 is inserted through the insertion opening.

Referring to fig. 9, a stationary claw 261e is provided on the inner side surface of the annular tube 261d, and the stationary claw 261e is used for fixing the aerosol-generating article 1 so that the aerosol-generating article 1 is held in the aerosol-generating device. The fixing claws 261e may have a plurality, such as 3 or 4, and the aerosol-generating article 1 may be fixed by the plurality of fixing claws 261e, so that the aerosol-generating article 1 is more uniformly stressed when being fixed. Optionally, the top of the fixed jaw 261e is provided with a guiding slope or a guiding cambered surface, which helps to ensure a smoother insertion of the aerosol-generating article 1 into the insertion opening.

The second base 261 and the second rib 261b are integrally injection molded to form a unitary body, which in one embodiment may be integrally formed with the second seal 292 by a two-shot molding process in order to reduce the number of components of the aerosol generating device, the unitary body being integrally formed with the second seal 292 to facilitate increased sealability of the connection between the second seal 292 and the second base 261.

The first and second seals 291 and 292 may be made of high temperature resistant silicone rubber or fluororubber, etc. The upper end cap 26 may be made of a plastic material with high temperature resistance, such as: PEEK, PI, PBI, PPS and temperature-resistant PC.

Of course, in some embodiments, upper end cap 26 may not be sealingly connected to heater 21 by second seal 292, but rather itself be sealingly connected to heater 21 by an interference fit with heater 21.

The process of preparing the heating module 2 may be:

s1, keeping one end of the first electrical connector 24, such as a temperature sensor, in contact with the outer side surface of the heater 21: 1. one end of the first electrical connector 24 is adhered to a preset position on the outer side surface of the heater 21 through a high-temperature adhesive tape, glass cement and the like; 2. wrapping the high-temperature-resistant aerogel on the outer side surface of the heater 21, wherein the high-temperature-resistant aerogel covers the contact part of the first electric connecting piece 24 and the heater 21, and the high-temperature-resistant aerogel has heat preservation and heat insulation effects; in order to ensure the contact stability of the first electrical connector 24 and the heater 21, a heat shrinkage tube can be sleeved outside the contact position of the first electrical connector 24 and the heater 21, and in order to protect the heat shrinkage tube, high temperature resistant aerogel is arranged between the heat shrinkage tube and the heater 21. So that the first electrical connector 24 can be held in contact with the outer side surface of the heater 21.

S2, the heater 21 in the step S1 is connected with the lower end cover 27 in a sealing way, and the first electric connector 24 penetrates through the first through hole 281.

S3, assembling the upper peripheral tube 22, and sealing and connecting the lower end cover 27 with the lower end of the peripheral tube 22 by riveting, wherein the heater 21 is positioned inside the peripheral tube 22.

S4, assembling an upper end cover 26, wherein the upper end cover 26 is in sealing connection with the upper end of the peripheral tube 22 through riveting, the upper end cover 26 is abutted against the upper end of the heater 21 and in sealing connection with the heater 21, so that a first space 25 among the upper end cover 26, the peripheral tube 22, the lower end cover 27 and the heater 21 is formed, and the heating module 2 is formed preliminarily.

S5, placing the preliminary heating module 2 in a sealed furnace chamber, and sucking air in the first space 25 through a gap between the first electric connecting piece 24 and the first through hole 281 by using a vacuumizing method, so that the air pressure of the first space 25 is smaller than the atmospheric pressure; then, the first electrical connector 24 and the second electrical connector 301 are electrically connected by electrical welding in the vacuum furnace, and simultaneously, the molten solder is filled in the gap between the first electrical connector 24 and the first through hole 281 or the gap between the first electrical connector 24 and the second through hole 281 by electrical welding, thereby sealing the first through hole 281. The preparation of the heating module 2 is completed.

Or S6 is used for replacing S5, the preliminary heating module 2 is placed in a sealed furnace chamber, and pure argon (or other gas with heat conductivity coefficient smaller than that of air) is injected into the first space 25 through a gap between the first electric connecting piece 24 and the first through hole 281; the first electrical connection, 24 is then electrically connected to the second electrical connection 301 by electrical soldering, while the molten solder is filled in the gap between the first electrical connection 24 and the first through hole 281 or in the gap between the first electrical connection 24 and the second through hole 281 by electrical soldering, thereby sealing the first through hole 281. The preparation of the heating module 2 is completed.

According to the heating module, the aerosol generating device and the preparation method of the heating module, the peripheral tube is used for blocking heat of the heater to be conducted outwards, the first electric connecting piece such as the sensor and the lead wire is arranged between the heater and the peripheral tube and needs to be electrically connected with the power supply assembly, a first space for accommodating the first electric connecting piece is arranged between the peripheral tube and the heater, the upper end cover and the lower end cover are respectively sealed at the upper end and the lower end of the first space, gaps between the first electric connecting piece and the first through hole are also sealed, the first space is sealed, accordingly, gas convection in the first space can be effectively reduced or heat transfer efficiency of the first space is reduced, the first space has a heat preservation effect, the peripheral tube can be cooperated to preserve heat of the heater, heat preservation effect on the heater can be remarkably improved, and energy consumption of the heating module is remarkably reduced.

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 peripheral tube having a chamber formed therein;

2. The heating module of claim 1, wherein the peripheral tube comprises an inner sidewall and an outer sidewall, the outer sidewall being located at a periphery of the inner sidewall, at least a portion of the chamber being defined by the inner sidewall;

and a negative pressure layer is formed between the inner side wall and the outer side wall, and the air pressure in the negative pressure layer is smaller than the atmospheric pressure.

3. The heating module of claim 2, wherein the inner sidewall and the outer sidewall are made of metal.

4. The heating module of claim 1, wherein the gas in the first space is at least one of argon, nitrogen, and carbon dioxide.

5. The heating module of claim 1, wherein the first space is a sealed space.

6. The heating module of claim 1, wherein at least one of the upper end cap and the lower end cap is provided with a first through hole communicated with the first space;

the heating module further comprises a first electric connecting piece, wherein one part of the first electric connecting piece is positioned in the first space, and the other part of the first electric connecting piece penetrates through the first through hole;

wherein the first through hole is sealed.

7. The heating module of claim 6, wherein a portion of the first electrical connection in the first space is configured to sense a temperature of the tubular heater.

8. The heating module of claim 6, wherein the lower end cap comprises a first substrate, the first substrate having the first through hole formed therein;

the heating module further comprises a second electric connecting piece, and the second electric connecting piece is arranged outside the first space;

The first electrical connector passes through the first through hole and is electrically connected with the second electrical connector.

9. The heating module of claim 8, wherein the first electrical connector is electrically connected to the second electrical connector by soldering.

10. The heating module of claim 8, wherein the second electrical connector is disposed on an outer side of the first substrate, the second electrical connector has a second through hole facing the first through hole, the first electrical connector is at least partially soldered to the second electrical connector in the second through hole, and the first through hole is filled with a solder seal between the second through hole and the first electrical connector, or the first through hole is filled with a solder seal between the first through hole and the first electrical connector.

11. The heating module of claim 8, wherein a portion of the second electrical connector is embedded in the first substrate and is partially exposed outside the first substrate.

12. The heating module of claim 1, wherein the tubular heater comprises a resistive material, the tubular heater generating heat by an electrothermal effect of the resistive material; or alternatively

The tubular heater comprises a substrate and an infrared electrothermal coating arranged on the substrate, and the tubular heater emits infrared rays through the infrared electrothermal coating; or alternatively

The tubular heater comprises a substrate and a magnetic field generator for generating a varying magnetic field, the substrate comprising magnetically susceptible material capable of generating heat in the varying magnetic field.

13. The heating module of claim 12, wherein the lower end cap includes a first substrate on which an electrode terminal is disposed, one end of the electrode terminal being located in the first space and electrically connected to the resistive material or the infrared electrothermal coating or the magnetic field generator, and the other end being exposed outside the first space through the first substrate.

14. The heating module of claim 13, wherein the first substrate and the electrode terminal are integrally formed by an insert molding process.

15. The heating module of claim 13, wherein the electrode terminal comprises:

a support part partially embedded in the first substrate and partially located in the first space;

a resilient arm located within the first space and connected to the support, the resilient arm being for electrical contact with the resistive material or the infrared electrothermal coating or the magnetic field generator;

And the contact arm is connected with the supporting part and is exposed on the outer side surface of the first substrate.

16. The heating module of claim 1, wherein at least a portion of the lower end cap is in interference fit and sealing connection with the peripheral tube.

17. The heating module of claim 1, wherein the lower end cap is provided with a fool-proof structure comprising at least one of a notch, a protrusion, and a logo.

18. A heating module as claimed in claim 1, wherein the tubular heater has a second space formed therein for accommodating the aerosol-generating article;

the lower end cap further comprises a storage tube, the bottom of the storage tube is closed, the top of the storage tube is open, and the top of the storage tube is communicated with the second space and is used for storing oil or residues from the aerosol-generating product.

19. The heating module of claim 1, further comprising a first seal providing a sealed connection between the lower end cap and the tubular heater.

20. The heating module of claim 1, wherein at least part of the upper end cap is in interference fit and sealing connection with the peripheral tube; and/or

The heating module further comprises a second sealing element, wherein the second sealing element provides sealing connection between the upper end cover and the tubular heater.

21. An aerosol generating device comprising the heating module of any of claims 1-20, further comprising a power supply assembly and an electrode terminal, wherein the first space is sealed, and wherein a portion of the electrode terminal is located in the first space and electrically connected to the tubular heater, and a portion of the electrode terminal is located outside the first space and electrically connected to the power supply assembly.

22. The aerosol generating device of claim 21, further comprising a first electrical connection having a portion located in the first space for sensing a temperature of the tubular heater and a portion located outside the first space and electrically connected to the power supply assembly.

23. The preparation method of the heating module is characterized by comprising the following steps:

sealing the first space.

24. The method of claim 23, wherein prior to forming the first space, assembling a first electrical connector such that after forming the first space, a portion of the first electrical connector is located in the first space and a portion passes through a first through hole provided on the upper end cap or the lower end cap so as to be located outside the first space;

then, the first through hole is sealed.

25. The method of claim 24, wherein gas is injected into or withdrawn from the first space through a gap between the first via and the first electrical connection prior to sealing the first via.