CN211837823U

CN211837823U - Aerosol generating device

Info

Publication number: CN211837823U
Application number: CN201922269867.8U
Authority: CN
Inventors: 李斌; 张鸿; 吴林
Original assignee: Lanto Electronic Ltd
Current assignee: Lanto Electronic Ltd; Kunshan Liantao Electronics Co Ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-11-03
Anticipated expiration: 2029-12-17

Abstract

The embodiment of the utility model discloses aerosol produces device, set up thermoelectric module between heating element and shell, thermoelectric module's cold junction is towards the shell, the hot junction is towards the heating element, thermoelectric module surrounds at least partial heating element, thermoelectric module is connected with the power electricity, can control the electric connection state of thermoelectric module and power through control circuit, thereby can make thermoelectric module can be with the heat transformation that heating element produced electric energy and make the power with electric energy storage, perhaps make the power lower the temperature or carry out the auxiliary heating to being heated the thing to the heating element circular telegram to the shell. Therefore, the utility model discloses aerosol generating device can carry out make full use of to the energy to can reduce the shell temperature when aerosol generating device uses, can improve user's use and experience.

Description

Aerosol generating device

Technical Field

The utility model relates to an aerosol generator field, concretely relates to aerosol produces device with thermoelectric module.

Background

The aerosol generating device generates aerosol by heating an object to be heated in a solid, liquid or other form. The heating temperature of the aerosol generating device is often high, and in a limited space, heat is easily diffused to a power supply and a shell through a heating unit, so that potential safety hazards are caused. Meanwhile, the heat diffused to the casing is not applied to the heated object for generating aerosol, and the heat is not fully utilized, so that more energy is wasted.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the utility model provides an aerosol generating device can make full use of the heat that the heating element released, can reduce the temperature of shell simultaneously, improves the security of using.

The embodiment of the utility model provides an aerosol generating device, be in including shell and setting core assembly in the shell, core assembly includes:

a heating unit having an accommodating chamber for accommodating an object to be heated;

a thermoelectric module surrounding at least a portion of the heating element, the thermoelectric module comprising a cold side and a hot side, the hot side facing the heating element, the cold side facing the housing;

a power source; and

a control circuit electrically connected to the thermoelectric module and the power source, the control circuit configured to control an electrical connection between the thermoelectric module and the power source to charge the thermoelectric module to the power source or to discharge the power source to the thermoelectric module.

Preferably, the thermoelectric module comprises a plurality of groups of thermocouples, and the thermocouples comprise a P-type thermocouple arm and an N-type thermocouple arm, and the P-type thermocouple arm is connected with the N-type thermocouple arm in series.

Preferably, at least two sets of said thermocouples are connected in series with each other.

Preferably, the thermocouple further comprises a conductor connecting the P-type and N-type thermocouple arms.

Preferably, the thermoelectric module further includes a first substrate and a second substrate, the thermocouple being disposed between the first substrate and the second substrate, the first substrate and the second substrate having a cylindrical shape, and the second substrate surrounding the first substrate.

Preferably, the thermoelectric module further includes first and second substrates facing each other, the thermocouple being disposed between the first and second substrates, and the second substrate being located outside the first substrate.

Preferably, the thermoelectric module includes two oppositely disposed flexible substrates, and the thermocouple is disposed between the two flexible substrates.

Preferably, the thermoelectric module further includes a flexible substrate, and the thermocouples are disposed at both sides of the flexible substrate.

Preferably, the aerosol generating device further comprises a thermally insulating layer disposed between the cold end and the outer shell.

Preferably, the heating unit comprises a heat insulation pipe and a heating pipe sleeved in the heat insulation pipe, and the thermoelectric module surrounds the heat insulation pipe.

Preferably, the core component further comprises a wireless charging module configured to wirelessly receive power from an external charging device and transmit power to the power supply and/or wirelessly output power of the power supply to an external device.

The utility model discloses aerosol generating device, set up thermoelectric module between heating element and shell, thermoelectric module's cold junction is towards the shell, the hot junction is towards the heating element, thermoelectric module surrounds partial heating element at least, thermoelectric module is connected with the power electricity, can control the electric connection state of thermoelectric module and power through control circuit, thereby can make thermoelectric module can be with the heat transformation that the heating element produced electric energy and make the power store the electric energy, perhaps make the power to the heating element circular telegram cool down the shell or to being heated the thing and carrying out the auxiliary heating. Therefore, the utility model discloses aerosol generating device can carry out make full use of to the energy to can reduce the shell temperature when aerosol generating device uses, can improve user's use and experience.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

fig. 1 is a schematic perspective view of an aerosol generating device according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a rigid thermoelectric module according to an embodiment of the present invention;

figure 3 is a schematic cross-sectional view of a thermoelectric module in accordance with an embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of a schematic structural diagram of a flexible thermoelectric module in accordance with an embodiment of the present invention.

Description of reference numerals:

1-a heating unit; 11-a containment chamber; 12-an insulating tube; 13-heating the tube; 2-a thermoelectric module; 21-cold end; 22-hot end; 23-a thermocouple; 231-P type thermocouple arms; 232-N type thermocouple arm; 233-a conductor; 24-a first substrate; 25-a second substrate; 26-a flexible substrate; 3-a power supply; 4-a heat insulation layer; 5-outer shell.

Detailed Description

The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth in detail. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.

Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

Unless the context clearly requires otherwise, throughout this specification, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".

In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean that, for example, they may be fixedly connected or detachably connected or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

When an element or layer is referred to as being "on," "engaged to," "connected to" or "coupled to" another element or layer, it may be directly on, engaged, connected or coupled to the other element or layer or intervening elements or layers may be present. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The pyroelectric phenomenon is a phenomenon in which an electric current or electric charge is accumulated when electrons (holes) in a heated object move from a high temperature region to a low temperature region. The thermoelectric effect includes three basic effects of the Seebeck (Seebeck) effect, the Peltier (Peltier) effect, and the Thomson (Thomson) effect. The seebeck effect is a phenomenon that when a temperature difference exists between two ends of a section of conductor (or semiconductor), a voltage is detected between the two ends of the conductor, and the larger the temperature difference is, the larger the generated voltage is. The peltier effect is a process opposite to the seebeck effect, and refers to a phenomenon in which heat is released or absorbed when a current passes through an interface between two conductors, and the amount of heat absorbed or released at the interface is proportional to the current flowing. The thomson effect describes the reversible conversion of the enthalpy of a conductor in the presence of both a temperature gradient and a current in a single uniform conductor, the conductor absorbing heat when the direction of motion of the carriers is opposite to the direction of the temperature gradient; when the carrier moving direction is consistent with the temperature gradient direction, the conductor releases heat.

In the thermoelectric device, one end of a P-type thermocouple arm and one end of an N-type thermocouple arm can be connected in series to form a thermocouple unit through a conductor, and the thermoelectric device is generally formed by connecting hundreds or thousands of groups of thermocouple units in series, so that a considerable thermoelectric power generation or power-on cooling/heating function can be realized. The P-type thermocouple arm is mainly made of hole conduction, and the N-type thermocouple arm is mainly made of electron conduction. Under the driving of the temperature difference, electrons or holes in the P-type thermocouple arm and the N-type thermocouple arm are directionally diffused, so that a potential difference is formed at two ends of a conductor connecting the P-type thermocouple arm and the N-type thermocouple arm. When the thermoelectric device is electrified, the junction of the thermocouple arm and the conductor can absorb or release heat according to the Peltier effect, so that temperature difference is generated at two ends of the thermoelectric device.

Fig. 1 is a schematic perspective view of an aerosol-generating device according to an embodiment of the present invention. As shown in fig. 1, the aerosol generating device of the embodiment of the present invention includes a housing 5 and a core component disposed in the housing 5, wherein the core component includes a heating unit 1, a thermoelectric module 2, a power supply 3 and a control circuit. The heating module has an accommodating cavity 11 that can accommodate an object to be heated, and the thermoelectric module 2 is provided on the outer periphery of the heating unit so as to surround at least a part of the heating unit 1. In detail, in some embodiments of the present invention, the thermoelectric module 2 may have an approximately arc-shaped structure, and the thermoelectric module 2 is disposed outside the heating unit 1 to partially surround the heating unit 1; in some embodiments of the present invention, the thermoelectric module 2 may be a cylindrical structure surrounding the heating unit 1. Thermoelectric module 2 comprises a cold side 21 and a hot side 22, wherein hot side 22 faces heating unit 1 and cold side 21 faces housing 5. The control circuit is electrically connected with the thermoelectric module 2 and used for controlling the electrical connection between the thermoelectric module 2 and the power supply 3 so as to enable the thermoelectric module 2 to charge the power supply 3 or enable the power supply 3 to discharge electricity to the thermoelectric module 2.

The heating unit 1 may include electric heating devices such as a heating tube, a heating pan, a heating rod, and a heating pin, or may be a combination of the electric heating devices, and for example, the heating unit 1 may include a heating tube and a heating pin. The heating unit 1 has a housing chamber 11 capable of housing an object to be heated. Optionally, the heating unit 1 includes a heating pipe 13 and an insulating pipe 12 sleeved outside the heating pipe 13. The heating tube 13 forms a hollow receiving chamber 11. In the aerosol-generating device, the heated material may be tobacco, cigarettes, cartridges, tobacco tar, or other substances. Taking the heated object as a cigarette as an example, the heating unit 1 may be a cylindrical heating pipe 13, and the accommodating cavity 11 of the heating pipe 13 is matched with the size of the cigarette. The heating pipe 13 heats the cigarette by electrifying to generate aerosol. The insulating tube 12 may be a vacuum insulating tube, an aerogel insulating tube, or other means of insulating. The heat insulating pipe 12 provided outside the heating pipe 13 can preferably retain the heat generated by the heating pipe 13, and the heat can be sufficiently applied to the object to be heated in the heating accommodating chamber 11, thereby improving the heat utilization efficiency.

The thermoelectric module 2 includes a plurality of sets of thermocouples 23, each thermocouple 23 includes a P-type thermocouple arm 231 and an N-type thermocouple arm 232, and one end of the P-type thermocouple arm 231 and one end of the N-type thermocouple arm 232 may be connected in series through a conductor 233 to form one set of thermocouples 23. The thermocouples 23 can be connected in series to form a thermoelectric conversion circuit for obtaining a larger voltage. Of course, according to actual needs, the thermoelectric conversion circuits connected in parallel or in a combination of series and parallel may be formed among the groups of thermocouples 23 by those skilled in the art. The series-connected thermocouples 23 form a continuous thermoelectric conversion circuit, and the thermoelectric conversion circuit is electrically connected with the control circuit. The control circuit controls the electrical connection state between the thermoelectric module 2 and the power supply 3, and causes the thermoelectric module 2 to charge the power supply 3 or causes the power supply 3 to discharge the thermoelectric module 2. The N-type and P-

type thermocouple arms

232 and 231 are made of a thermoelectric material, and may be a specific semiconductor, such as a semiconductor containing bismuth, antimony, germanium, silicon, or the like. The P-type thermocouple arm 231 is a P-type semiconductor, i.e., a semiconductor mainly based on hole conduction; the N-type thermocouple arm 232 is an N-type semiconductor, i.e., a semiconductor that is primarily electron conductive. Generally, the P-type thermocouple arm 231 and the N-type thermocouple arm 232 may be materials having low thermal conductivity, so that a large temperature difference can be generated at both ends of the thermocouple 23.

Thermoelectric module 2 surrounds at least a portion of insulated pipe 12, and hot side 22 is within the thermal radiation range of heating unit 1. Preferably, the hot end 22 may be as close to the insulating tube 12 as possible, so that the hot end 22 has a higher temperature, so as to obtain a larger temperature difference between the hot end 22 and the cold end 21, thereby obtaining a better thermoelectric power generation effect or cooling effect. The thermoelectric module 2 may be shaped to substantially conform to the heating unit 1. For example, when the heating unit 1 is cylindrical, the thermoelectric module 2 may be made into an arc shape, a cylindrical shape, a cup shape, etc., and the thermoelectric module 2 is sleeved outside the heating unit 1, and an opening may be provided on a side surface of the thermoelectric module 2, or the thermoelectric module 2 may be a plurality of petal-shaped structures provided outside the heating pipe. The thermoelectric module 2 may be made rigid or flexible.

Figure 2 is a schematic perspective view of a rigid thermoelectric module according to an embodiment of the present invention,

fig. 3 is a schematic cross-sectional view of a rigid thermoelectric module in accordance with an embodiment of the present invention.

As shown in fig. 2-3, in an alternative embodiment, the thermoelectric module 2 further includes a first substrate 24 and a second substrate 25, and the first substrate 24 and the second substrate 25 may be rigid substrates and made of a rigid insulating material having a high thermal conductivity, such as ceramic, heat-resistant plastic, etc. The plurality of sets of thermocouples 23 are distributed between the first substrate 24 and the second substrate 25, and the plurality of sets of thermocouples 23 may be connected in series with each other through the conductor 233. As shown in fig. 3, the conductor 233 connecting the P-type thermocouple arm 231 and the N-type thermocouple arm 232 in each group of thermocouples 23 and the conductor 233 connecting the different groups of thermocouples 23 may be in contact with the inner side of the second substrate 25 and the outer side of the first substrate 24, respectively, so that good heat conduction with the first substrate 24 and the second substrate 25 is possible.

The distance between the first substrate 24 and the second substrate 25 can be set to be larger while ensuring the size requirement, so that the length of the arm of the thermocouple 23 can be longer, and a larger temperature difference can be established between the two ends of the arm of the thermocouple 23.

The first base plate 24 and the second base plate 25 may be configured in a cylindrical shape, as shown in fig. 2, wherein the inner diameter of the second base plate 25 is larger than the outer diameter of the first base plate 24, the second base plate 25 is sleeved on the outer periphery of the first base plate 24, and the first base plate 24 is used for being sleeved on the outer periphery of the heating unit 1. When the heating unit 1 is controlled to heat, the first substrate 24 side is the hot side 22 of the thermoelectric module 2, and the second substrate 25 side is the cold side 21 of the thermoelectric module 2.

The first substrate 24 and the second substrate 25 may also be configured as a circular arc, a flat plate or other shapes suitable for being disposed outside the heating unit 1, wherein the second substrate 25 is disposed outside the first substrate 24, and the outside refers to a side of the first substrate 24 away from the heating unit.

In another alternative embodiment, the thermoelectric module 2 may include two oppositely disposed first and

second substrates

24 and 25, each of the first and

second substrates

24 and 25 may be a flexible substrate, and the plurality of sets of thermocouples 23 are disposed between the flexible first and

second substrates

24 and 25. The arrangement of the thermocouple 23 between the two flexible substrates (the first substrate 24 and the second substrate 25) can refer to the arrangement shown in fig. 2 and 3, and other arrangements can be adopted according to actual needs. The thickness of the second substrate 25 may be set to be thin, or a material with high thermal conductivity may be used, so that the thermoelectric module 2 can perform good heat exchange with the outside. The distance between the two flexible substrates can be set to be larger on the premise of ensuring the size requirement, so that the length of the thermocouple arm can be longer, and larger temperature difference is established at two ends of the thermocouple arm.

The arrangement and connection of the thermocouples in fig. 2-3 are optional, and those skilled in the art can design other thermocouple arrangements as required.

Fig. 4 is a schematic cross-sectional view of a flexible thermoelectric module in accordance with an embodiment of the invention. In another alternative embodiment, as shown in fig. 4, the thermoelectric module 2 further includes a flexible substrate 26, a plurality of sets of thermocouples 23 are distributed on both sides of the flexible substrate 26, the plurality of sets of thermocouples 23 on each side are electrically connected through a conductor 233 to form a connected thermoelectric conversion circuit, and the thermoelectric conversion circuits on both sides can be electrically connected in parallel or in series and are electrically connected to the power supply 3. The thermocouple 23 is fixed substantially vertically on the flexible substrate 26, and one end of the P-type thermocouple arm 231 and one end of the N-type thermocouple arm 232 face the flexible substrate 26, i.e., the direction of the temperature difference is substantially perpendicular to the flexible substrate 26. On one side of the flexible substrate 26 facing the heating unit 1, one end of the thermocouple 23 away from the flexible substrate 26 is a hot end, and one end of the thermocouple 23 close to the flexible substrate 26 is a cold end; on the side of the flexible substrate 26 facing away from the heating unit 1, one end of the thermocouple 23 close to the flexible substrate 26 is a hot end, and one end of the thermocouple 23 far away from the flexible substrate 26 is a cold end. In order to provide a large temperature difference between cold end 21 and hot end 22, the length of the thermocouple arm may be set to be long, and flexible substrate 26 may be a flexible material with low thermal conductivity, heat resistance, and good insulation, such as a Polyimide (PI) material, a Polyethylene terephthalate (PET) material, and the like. Under the condition that the requirement on the size is not high, the thickness of the flexible substrate 26 can be set to be thicker, so that heat can be better prevented from being diffused to the outside through the flexible substrate 26.

The flexible thermoelectric module 2 can be rolled into a cylindrical shape, a spiral shape or other shapes suitable for use, is arranged on the outer periphery of the heating unit 1, can be freely arranged according to the shape of the heating unit 1, and has wider adaptability.

Of course, a plurality of thermoelectric modules 2 as shown in fig. 2 to 4 may be provided, and the plurality of thermoelectric modules 2 may be combined in a manner of being nested with each other and disposed outside the heating unit 1 to fully utilize the temperature difference.

The power supply 3 is a rechargeable power supply. When the heating unit 1 heats the object to be heated, the temperature of the hot end 22 of the thermoelectric module 2 continues to rise, and at this time, the control circuit may cut off the circuit between the thermoelectric module 2 and the power supply 3. When the heating tube stops working, the control circuit can be communicated with a loop between the thermoelectric module 2 and the power supply 3, and because a large temperature difference exists between the hot end 22 (i.e. the end facing the heating unit 1) and the cold end 21 (i.e. the end facing the shell 5) of the thermoelectric module 2, the thermoelectric module 2 generates current according to the seebeck effect and charges the power supply 3, so that waste heat can be converted into electric energy.

Alternatively, the control circuit may conduct a circuit between the power supply 3 and the thermoelectric module 2 when the heating unit 1 is heating, or when the housing 5 of the aerosol generating device is at a high temperature, controlling the power supply 3 to apply a direct current to the thermoelectric module 2. Specifically, in each group of thermocouples 23, if electrons flow from P-type thermocouple arm 231 to N-type thermocouple arm 232 via conductor 233, the direction of carriers of P-type thermocouple arm 231 is opposite to the direction of electrons, and the potential energy of electrons in conductor 233 is lower than that in N-type thermocouple arm 232, then both thermocouple 23 arms absorb heat at the junction of conductor 233, i.e., the temperature of cold end 21 decreases; when electrons flow from N-type thermocouple arm 232 to P-type thermocouple arm 231 via conductor 233, the electron potential of N-type thermocouple arm 232 is higher than the electron potential in conductor 233, and the hole energy in P-type thermocouple arm 231 is also higher than the hole energy in conductor 233, then both thermocouple 23 arms release heat at the junction of conductor 233, i.e., the temperature of hot end 22 increases. Therefore, the temperature of the shell 5 connected with the cold end 21 can be reduced, and the user can be prevented from being scalded due to the overhigh temperature of the shell 5. In addition, the power supply 3 may supply power to the thermoelectric module 2 through the control circuit, so as to lower the temperature of the cold end 21 of the thermoelectric module 2 and actively dissipate heat from the housing 5. In this embodiment and some other embodiments, the power supply 3 may also provide power to the thermoelectric module 2 through the control circuit, so as to raise the temperature of the hot end 22 of the thermoelectric module 2 as auxiliary heating, that is, the hot end 22 can also perform auxiliary heating or heat preservation on the object to be heated.

Optionally, a heat insulation layer 4 may be further disposed between the cold end 21 of the thermoelectric module 2 and the housing 5, so as to further avoid the influence on the user experience caused by the over-high temperature of the housing 5 due to the heat emitted by the heating module 2. The thermal-insulated layer can adopt aerogel thermal insulation material, thermal-insulated engineering plastics etc. also can adopt the compound thermal-insulated structure of multiple heat insulating mode.

Optionally, the core component may further include a wireless charging module, and the wireless charging module may receive power wirelessly from an external dedicated or general wireless charging device and transmit the power to the power supply 3. Preferably, the wireless charging module can also be controlled to transmit the electric energy in the power supply 3 to the external device in a wireless manner.

Thermal insulation layers 4 can be arranged between the wireless charging module and the heating unit 1 and between the power supply 3 and the heating unit 1, so that the wireless power receiver or the power supply 3 can be prevented from being damaged due to overhigh temperature.

The temperature of the aerosol generating device according to the embodiment of the present invention and the temperature of the aerosol generating device according to the comparative example after the aerosol is generated by heating 2 cigarettes by energization were compared. Among them, the aerosol-generating device in the comparative example lacks a thermoelectric module as compared with the aerosol-generating device of the present embodiment.

	Center temperature (. degree. C.)	Maximum temperature (. degree. C.)
			This example	34.4	44.0
Comparative example	37.9	50.6

Wherein the central temperature shown in the table above is the temperature measured at the central position of the aerosol generating device. As shown in the table, after two cigarettes are heated by energization, the central temperature of the aerosol generating device of the embodiment is reduced by 3.5 ℃ compared with the comparative example, and the maximum temperature of the aerosol generating device of the embodiment is effectively reduced by 6.6 ℃ compared with the comparative example. It can be seen that the provision of the thermoelectric module 2 in the aerosol generating device can substantially reduce the temperature of components other than the heat generating unit.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. An aerosol-generating device comprising a housing (5) and a core assembly disposed within the housing (5), wherein the core assembly comprises:

a heating unit (1), the heating unit (1) having an accommodating chamber (11) for accommodating an object to be heated;

-a thermoelectric module (2) surrounding at least part of said heating unit (1), said thermoelectric module (2) comprising a cold side (21) and a hot side (22), said hot side (22) being directed towards said heating unit (1), said cold side (21) being directed towards said housing (5);

a power supply (3); and

a control circuit electrically connected with the thermoelectric module (2) and the power source (3), the control circuit configured to control the electrical connection between the thermoelectric module (2) and the power source (3) to charge the thermoelectric module (2) to the power source (3) or to discharge the power source (3) to the thermoelectric module (2).

2. An aerosol generating device according to claim 1, wherein the thermoelectric module (2) comprises a plurality of sets of thermocouples (23), the thermocouples (23) comprising one P-type thermocouple arm (231) and one N-type thermocouple arm (232), the P-type thermocouple arm (231) being in series with the N-type thermocouple arm (232).

3. An aerosol generating device according to claim 2, wherein at least two sets of thermocouples (23) are connected in series with each other.

4. An aerosol generating device according to claim 2, wherein the thermocouple (23) further comprises a conductor (233), the conductor (233) connecting the P-type thermocouple arm (231) and the N-type thermocouple arm (232).

5. An aerosol-generating device according to any one of claims 2 to 4 in which the thermoelectric module (2) further comprises a first substrate (24) and a second substrate (25), the thermocouple (23) being disposed between the first substrate (24) and the second substrate (25), the first substrate (24) and the second substrate (25) being cylindrical, the second substrate (25) surrounding the first substrate (24).

6. An aerosol-generating device according to any one of claims 2 to 4 in which the thermoelectric module (2) further comprises first and second opposing substrates (24, 25), the thermocouple (23) being disposed between the first and second substrates (24, 25), the second substrate (25) being located outside the first substrate (24).

7. An aerosol-generating device according to any one of claims 2 to 4 in which the thermoelectric module (2) comprises two oppositely disposed flexible substrates (26), the thermocouple (23) being disposed between the two flexible substrates (26).

8. An aerosol-generating device according to any one of claims 2 to 4 in which the thermoelectric module (2) further comprises a flexible substrate (26), the thermocouples (23) being disposed on both sides of the flexible substrate (26).

9. An aerosol-generating device according to any of claims 1 to 4, further comprising a thermally insulating layer (4), the thermally insulating layer (4) being disposed between the cold end (21) and the outer shell (5).

10. An aerosol-generating device according to claim 9, wherein the heating unit (1) comprises an insulated tube (12) and a heating tube (13) nested within the insulated tube (12), the thermoelectric module (2) surrounding the insulated tube (12).

11. An aerosol-generating device according to any one of claims 1 to 4, wherein the heating unit (1) comprises an insulated tube (12) and a heating tube (13) nested within the insulated tube (12), the thermoelectric module (2) surrounding the insulated tube (12).

12. An aerosol generating device according to any of claims 1 to 4, wherein the core assembly further comprises a wireless charging module configured to wirelessly receive power from an external charging device and to transmit power to the power supply (3) and/or to wirelessly output power from the power supply (3) to an external device.