CN116019264A - Aerosol generating device - Google Patents

Abstract

The present invention provides an aerosol-generating device comprising: a tubular body having a receiving cavity therein, a proximal end of the tubular body being open for entry of aerosol-generating articles, a distal end of the tubular body having a bottom wall; an induction coil coupled to the tubular body for generating a varying magnetic field; a susceptor capable of generating heat in a varying magnetic field for heating an aerosol-generating article to produce an aerosol, the susceptor being in a range capable of being penetrated by the varying magnetic field produced by the induction coil; and a magnetic shield disposed at the periphery of the susceptor or connected with the tubular body; wherein the magnetic shield is configured to be adjustable and the magnetic field that penetrates the susceptor changes when the magnetic shield is configured to be adjusted. The invention completes the regulation of the heating temperature of the susceptor by regulating the magnetic shielding piece, avoids the out-of-control heating temperature of the susceptor, and can continuously use the aerosol generating device after the current in the automatic control induction coil fails.

Description

Aerosol generating device

Technical Field

The present disclosure relates to the field of aerosol generating technologies, and in particular, to an aerosol generating device.

Background

The aerosol-generating device employs an electrical heating means to cause the aerosol-generating article to produce an aerosol for inhalation by a user without combustion.

Among them, some aerosol-generating devices employ induction heating to heat an aerosol-generating article, and software to automatically control the heating temperature of the heater, typically by controlling the magnitude of the current flowing through the induction coil or by adjusting the frequency of the alternating current flowing through the induction coil to adjust the magnetic field penetrating the heater, thereby adjusting the heating temperature of the heater.

However, the software control has a certain uncertainty, and there is a risk of failure of the software control in daily use, and when the software control fails, the heater is likely to continuously heat up, not only to burn the aerosol-generating article, but also with considerable safety risks.

Disclosure of Invention

The present invention provides an aerosol-generating device that can control the heating temperature of a susceptor by adjusting the magnetic field penetrating the susceptor through a magnetic shield.

The present invention provides an aerosol-generating device comprising:

a tubular body having a receiving cavity therein, a proximal end of the tubular body being open for insertion of an aerosol-generating article into the receiving cavity, a distal end of the tubular body having a bottom wall;

an induction coil disposed on the tubular body for generating a varying magnetic field;

a susceptor capable of generating heat in a varying magnetic field for heating the aerosol-generating article to produce an aerosol, the susceptor being in a range penetrable by the varying magnetic field produced by the induction coil;

a magnetic shield disposed at the periphery of the susceptor or below the tubular body;

wherein the magnetic shield is configured to be adjustable and a magnetic field that penetrates the susceptor changes when the magnetic shield is configured to be adjusted.

Compared with the prior art, the invention has the following beneficial effects:

the aerosol-generating device of the invention, the magnetic shield disposed at the periphery of the tubular body or below the tubular body is adjustable, and by adjusting the magnetic shield, the magnetic field passing through the susceptor can be adjusted, and thus the heat generation temperature of the susceptor can be adjusted. Therefore, when the current flowing through the induction coil is automatically controlled to be invalid or the current frequency is invalid, the heating temperature of the susceptor can be adjusted by adjusting the magnetic shielding piece, the problem of out-of-control heating temperature of the susceptor is avoided, and the aerosol generating device can be continuously used after the current in the induction coil is automatically controlled to be invalid, so that the suction of at least one aerosol generating product is completed.

Drawings

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

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

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

FIG. 3 is a top view of a magnetic shield provided in an embodiment of the present invention in an open position;

FIG. 4 is a front view of a magnetic shield provided by another embodiment of the present invention in a shielding position;

FIG. 5 is a front view of a magnetic shield provided by yet another embodiment of the present invention in a shielding position;

in the figure:

1. an aerosol-generating article;

2. a heating assembly; 21. a tubular body; 211. a receiving chamber; 22. an induction coil; 23. a susceptor; 24. a magnetic shield; 241. a bracket; 242. a sheet; 243. a rotation shaft;

3. a power supply assembly; 31. a power supply; 32. and a control circuit.

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 relative importance or implicitly indicating the number or order of technical features indicated. All directional indicators (such as up, down, left, right, front, rear … …) in the embodiments of the present application are merely used to explain the relative positional relationship or movement of the components under a certain posture (as shown in the drawings), and if the posture is changed, the directional indicator 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 feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

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

Referring to fig. 1, an embodiment of the present invention provides an aerosol-generating device for heating an aerosol-generating article 1 to volatilize aerosol from the aerosol-generating article 1 for inhalation.

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

Referring to fig. 1, the aerosol-generating article 1 comprises an aerosol-generating substrate at a distal end and a mouthpiece at a proximal end for holding a user's mouth, the user inhaling the aerosol through the inhalation mouthpiece. Wherein the distal end is the end far away from the consumer's mouth, and the proximal end is the end near the consumer's mouth.

The aerosol-forming substrate may be a solid aerosol-forming substrate. Alternatively, the aerosol-forming substrate may comprise solid and liquid components. The aerosol-forming substrate may comprise tobacco. The aerosol-forming substrate may comprise a tobacco-containing material containing volatile tobacco flavour compounds that are released from the substrate upon heating. The aerosol-forming substrate may comprise a non-tobacco material. The aerosol-forming substrate may comprise tobacco-containing material and no tobacco-containing material.

The outer diameter of the aerosol-generating article 1 may be between about 5mm and about 12 mm, for example between about 5.5 mm and about 8 mm. In an embodiment, the outer diameter of the aerosol-generating article 1 is 6 mm±10%.

The total length of the aerosol-generating article 1 may be between about 25mm and about 100 mm. The total length of the aerosol-generating article 1 may be between about 30mm and about 100 mm. In one embodiment, the total length of the aerosol-forming substrate comprises about 1/2 of the total length of the aerosol-generating article 1. In another embodiment, the total length of the aerosol-generating article 1 is about 45mm. In yet another embodiment, the total length of the aerosol-forming substrate is about 33mm.

As used herein, the term "aerosol-generating device" is a device that interfaces or interacts with the aerosol-generating article 1 to form an inhalable aerosol. An electrically heated aerosol-generating device is a device that comprises a power supply assembly for supplying energy to heat an aerosol-forming substrate to generate an aerosol.

The aerosol-generating device may be described as a heated aerosol-generating device, which is an aerosol-generating device comprising a heating assembly 2. The heating assembly 2 is for heating an aerosol-forming substrate of the aerosol-generating article 1 to generate an aerosol.

The aerosol-generating device may comprise a power supply assembly 3 for supplying power to the heating assembly 2. The power supply assembly 3 may comprise any suitable power supply 31, for example a DC source, such as a battery. In one embodiment, the power source 31 is a lithium ion battery. Alternatively, the power source 31 may be a nickel metal hydride battery, a nickel cadmium battery, or a lithium-based battery, such as a lithium cobalt, lithium iron phosphate, lithium titanate, or lithium polymer battery. The power supply assembly 3 may include one or more control circuits 32, and the control circuits 32 may control the output of the power supply 31, for example, to cause the power supply 31 to output alternating current or direct current, or the like, or to cause the power supply 31 to output current or voltage, or the like, for example, in the form of pulses.

The control circuit 32 may have one or more microprocessors or microcontrollers thereon.

The aerosol-generating device further comprises an air inlet channel communicating the environment with the heating assembly 2, through which air from the environment enters the heating assembly 2 during inhalation, and thus the aerosol-generating substrate 11 of the aerosol-generating article 1, and finally the mouth of the user through the mouthpiece.

The heating assembly 2 may be an integral part of the aerosol-generating article 1; or the heating assembly 2 may be an integral part of the aerosol-generating device; or a part of the heating assembly 2 may be an integral part of the aerosol-generating article 1 and a part may be an integral part of the aerosol-generating device. In the embodiment shown in fig. 2, the heating assembly 2 forms part of an aerosol-generating device.

The heating assembly 2 may comprise an external heating assembly or an internal heating assembly, as used herein, the term "external heating assembly" refers to a heating assembly that is positioned outside the aerosol-generating article when the aerosol-generating system comprising the aerosol-generating article is assembled. As used herein, the term "internal heating assembly" refers to a heating assembly 2 that is positioned at least partially within an aerosol-generating article when the aerosol-generating system comprising the aerosol-generating article is assembled.

In the embodiment shown in fig. 2, the heating assembly 2 comprises a tubular body 21, an induction coil 22, a susceptor 23 and a magnetic shield 24. The interior of the tubular body 21 has a receiving cavity 211 for receiving the aerosol-generating substrate 11 of the aerosol-generating article 1. The induction coil 22 is adapted to provide a varying magnetic field, the susceptor 23 is penetrable by the varying magnetic field provided by the induction coil 22, and the susceptor 23 is adapted to generate heat in the varying magnetic field, the aerosol-generating substrate 11 being heated by the heat emitted by the susceptor 23 to generate an aerosol.

In one embodiment, suitable susceptor 23 materials include, but are not limited to: ferromagnetic materials, such as ferrite, ferromagnetic steel, or stainless steel; in one embodiment, susceptor materials include, but are not limited to: nickel-iron alloy. In one embodiment, susceptor materials include, but are not limited to: 400 series stainless steel, 400 series stainless steel such as grade 410 or grade 420 or grade 430 stainless steel.

In the embodiment shown in fig. 2, the susceptor 23 may comprise an internal heater, which is substantially rod-like, plate-like or needle-like, etc. shaped to facilitate insertion into the aerosol-generating article 1. At least part of the susceptor 23 is located in the accommodation cavity 211 inside the tubular body 21 to be inserted inside the aerosol-generating substrate 11 when the aerosol-generating substrate 11 of the aerosol-generating article 1 is located in the accommodation cavity 211.

It will be appreciated that in other embodiments, susceptor 23 may comprise an external heater, which may be incorporated on tubular body 21, and located at the periphery of receiving cavity 211.

The induction coil 22 has one or more, and in one embodiment, the induction coil 22 is capable of generating a fluctuating electromagnetic field between 1 and 30MHz, preferably between 2 and 10MHz, and preferably between 5 and 7 MHz. In one embodiment, the induction coil 22 is capable of generating a fluctuating electromagnetic field having a field strength (H-field) of between 1 and 5kA/m, such as between 2 and 3kA/m, such as about 2.5 kA/m.

Referring to fig. 2, an induction coil 22 may be disposed on the tubular body 21. In one embodiment, the induction coil 22 is wound around the periphery of the tubular body 21; in an embodiment, the induction coil 22 is at least partially embedded on the outer surface of the tubular body 21; in one embodiment, the induction coil 22 is located in the wall of the tubular body 21; in one embodiment, the induction coil 22 is bonded to the inner surface of the tubular body 21.

Magnetic induction lines are used to characterize the magnetic field generated by induction coil 22 under alternating current, and the varying magnetic field penetrates susceptor 23 in that at least a portion of the magnetic induction lines pass through susceptor 23. The greater the number and density of the magnetic induction lines passing through the susceptor 23, the greater the induced current and hysteresis formed in the susceptor 23, and the higher the heat generation efficiency of the susceptor 23.

As shown in fig. 2, the end of the tubular body 21 near the mouthpiece is the proximal end, the proximal end of the tubular body 21 is open, the aerosol-generating article 1 passes through the proximal end of the tubular body 21 into the receiving chamber 211, and the distal end of the tubular body 21 is disposed opposite to the proximal end thereof. The induction coil 22 is substantially tubular, is provided on the tubular body 21 and is provided on the periphery of the susceptor 23, and the magnetic induction lines penetrate the tubular body 21 from the proximal end of the tubular body 21 and then penetrate the tubular body 21 from the distal end of the tubular body, or penetrate the tubular body 21 from the distal end of the tubular body 21 and then penetrate the tubular body 21 from the proximal end of the tubular body 21, and the susceptor 23 located inside the tubular body 21 generates heat under the magnetic induction lines penetrating and penetrating the tubular body 21.

The magnetic shield 24 can restrict the magnetic field generated by the induction coil 22, and the magnetic shield 24 is disposed at the periphery of the susceptor 23 or below the tubular body 21, and the magnetic shield 24 can reduce the number or density of magnetic induction lines passing through the susceptor 23, thereby weakening the magnetic field strength penetrating through the susceptor 23.

In one embodiment, suitable magnetic shield 24 is made from materials including, but not limited to: ferromagnetic materials, such as ferrite, ferromagnetic steel, or stainless steel; the magnetic shield 24 in one embodiment is made from materials including, but not limited to: nickel-iron alloy. In one embodiment, the magnetic shield 24 is made from a material including, but not limited to: 400 series stainless steel, 400 series stainless steel such as grade 410 or grade 420 or grade 430 stainless steel.

The magnetic shield 24 is configured to be adjustable. In one embodiment, the magnetic shield 24 may be adjusted to: the magnetic shield 24 can be displaced in the aerosol-generating device by adjusting the position of the magnetic shield 24 in the aerosol-generating device to shield the magnetic field that is at least partially able to penetrate the susceptor 23, such that the magnetic field that passes through the susceptor 23 is weakened, or such that the number or density of lines of magnetic induction that pass through the susceptor 23 is reduced. In one embodiment, the magnetic shield 24 may be adjusted to: the magnetic shield 24 can be opened and closed so that the area of the magnetic shield 24 for shielding the magnetic field can be changed, the magnetic field penetrating the susceptor 23 can be adjusted by adjusting the shielding area of the magnetic shield 24, the magnetic field penetrating the susceptor 23 can be changed, or the number or density of magnetic induction lines penetrating the susceptor 23 can be changed. Thus, when the magnetic shield 24 is adjusted, the magnetic field penetrating the susceptor 23 changes accordingly.

To facilitate adjustment of the magnetic shield 24, the magnetic shield 24 may be disposed at the periphery of the distal end or the proximal end of the tubular body 21, or the magnetic shield 24 may be disposed below the distal end of the tubular body 21, so that the magnetic shield 24 blocks the magnetic induction lines passing into or out of the susceptor 23, thereby breaking the closed loop of the magnetic induction lines, thereby weakening the magnetic field environment in which the susceptor 23 is located, and reducing the heat generation efficiency of the susceptor 23.

The following describes in detail an example in which the magnetic shield 24 can be opened and closed.

Referring to fig. 2-5, the magnetic shield 24 includes a support and a leaf 242, the leaf 242 having a shielding surface capable of preventing passage of magnetic induction lines, the leaf 242 being rotatably disposed on the support, the area of the shielding surface blocking the magnetic induction lines being a shielding area that varies as the leaf 242 rotates when the leaf 242 is rotated. The larger the shielding area, the weaker the magnetic field penetrating the susceptor 23, the lower the heat generating efficiency of the susceptor 23, the smaller the shielding area, the stronger the magnetic field penetrating the susceptor 23, and the higher the heat generating efficiency of the susceptor 23.

In one embodiment, referring to fig. 3, the stand comprises two brackets 241 disposed opposite and parallel to each other, the sheet 242 is disposed between the two brackets 241, and the sheet 242 is rotatably connected to both brackets 241.

The magnetic shield 24 includes a rotary shaft 243, the rotary shaft 243 connects the sheets 242 and opposite ends of the rotary shaft 243 are inserted into or even pass through the corresponding holders 241, respectively, and when the rotary shaft 243 rotates, the sheets 242 rotate in synchronization therewith, and the sheets 242 are rotatably connected to the holders 241 through the rotary shaft 243.

In one embodiment, the sheet 242 has and only has one piece, which may be rotated between 0-180, or between 0-360. The shielding area of the only one blade 242 is maximized when the shielding surface of the only one blade 242 is rotated to be perpendicular to the longitudinal direction of the tubular body 21, and the shielding area of the only one blade 242 is minimized when the shielding surface of the only one blade is rotated to be parallel to the longitudinal direction of the tubular body 21.

In one embodiment, there is more than one sheet 242, and the sheet 242 is rotatable between a first angle and a second angle. When the blades 242 are rotated to the first angle, the blades 242 are in the shielding position, the distance between the shielding surfaces of two adjacent blades 242 is minimum, and at this time, the shielding effect on the magnetic field of the susceptor 23 is strongest. When the sheet 242 is rotated to the second angle, the sheet 242 is in the open position, and the distance between the shielding surfaces of two adjacent sheets 242 is the largest, and at this time, the shielding effect against the magnetic field of the susceptor 23 is the smallest.

In the embodiment shown in fig. 4, when the sheets 242 are in the shielding position, the shielding surfaces of adjacent sheets 242 partially overlap in the longitudinal direction, and at this time, the shielding surfaces of adjacent sheets 242 may be spaced apart from each other to avoid collision or friction between sheets 242. Meanwhile, when the blades 242 are in the shielding position, the included angle between the shielding surface of the blades 242 and the longitudinal direction of the tubular body 21 is larger than 0 degrees and smaller than 90 degrees, and although the shielding area of each blade 242 is not the largest, the rotating angle of the blades 242 can be reduced, so that the rotation of the blades 242 can be regulated and controlled conveniently.

In the embodiment shown in fig. 3, the angle between the shielding surface and the longitudinal direction of the tubular body 21 is equal to or close to 0 ° when the blades 242 are in the open position, the shielding surface being parallel or nearly parallel to the longitudinal direction of the tubular body 21.

When the aerosol-generating device is in a normal state, the control circuit 32 controls the power supply 31 to output an alternating current to the induction coil 22, and specifically, the control circuit 32 can control the magnitude or frequency of the alternating current flowing through the induction coil 22, and thereby regulate the heating efficiency of the susceptor 23.

The aerosol-generating device further comprises a temperature sensor for detecting the temperature of the susceptor 23, while the temperature sensor is connected to the control circuit 32 for feeding back the detected temperature of the susceptor 23 to the control circuit 32, the control circuit 32 uses the current temperature of the susceptor 23 as a basis for adjusting the temperature of the susceptor 23 at the next moment: if the current temperature is too high, the control circuit 32 decreases the current magnitude or current frequency in the induction coil 22 to decrease the heating efficiency of the susceptor 23, thereby preventing the temperature of the susceptor 23 from being continuously too high; if the current temperature is too low, the control circuit 32 increases the magnitude or frequency of the current in the induction coil 22 to increase the heating efficiency of the susceptor 23, and further increases the temperature of the susceptor 23 to enable sufficient baking of the aerosol-generating substrate.

In a normal state of the aerosol-generating device, the magnetic shield 24 is in a minimum shielding area or the leaf 242 is in an open position such that the magnetic shielding effect of the magnetic shield 24 on the susceptor 23 is minimal.

When the aerosol-generating device is in an abnormal state, i.e. when the control circuit 32 fails to receive temperature feedback from the temperature sensor or fails to control the current to the induction coil 22, the magnitude of the magnetic field penetrating the susceptor 23 is adjusted by adjusting the magnetic shield 24, thereby achieving temperature adjustment of the susceptor 23.

In one embodiment, the magnetic shield 24 is connected to a driving device such as a motor or an electric machine, and the driving device can drive the sheet 242 to rotate or drive the magnetic shield 24 to displace, so as to adjust the magnetic shield 24. The drive is connected to a control circuit 32, the control circuit 32 automatically adjusting the magnetic shield 24 by controlling the drive.

In one embodiment, the magnetic shielding 24 is connected with a transmission device such as a gear or a connecting rod, and part of the transmission device is exposed outside the aerosol generating device, so that a user can drive the sheet 242 to rotate or drive the magnetic shielding 24 to displace through a manual driving device, and further, the magnetic shielding 24 is adjusted.

The aerosol generating device further comprises a display which can remind a user of abnormality and prompt the user to manually adjust the temperature of the susceptor 23, the temperature sensor is connected with the display, the display can display the temperature of the susceptor 23, and the user can manually adjust the magnetic shielding piece 24 according to the temperature displayed by the display, so that the temperature adjustment of the susceptor 23 is realized.

In the aerosol-generating device described above, the magnetic shield provided at the periphery of the susceptor or below the tubular body is adjustable, and by adjusting the magnetic shield, the magnetic field passing through the susceptor can be adjusted, and thus the heat generation temperature of the susceptor can be adjusted. Therefore, when the current flowing through the induction coil is automatically controlled to be invalid or the current frequency is invalid, the heating temperature of the induction body can be adjusted by adjusting the magnetic shielding piece, so that the heating temperature of the induction body is prevented from being out of control, and the aerosol generating device can be continuously used after the current in the automatic control induction coil is invalid, and the suction of at least one aerosol generating product is completed.

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, it is obvious to those skilled in the art that modifications and variations can be made according to the above description, and all such modifications and variations are intended to fall within the scope of the appended claims.

Claims (10)

1. An aerosol-generating device, comprising:

-a tubular body (21) having a receiving cavity (211) therein, a proximal end of the tubular body (21) being open for insertion of an aerosol-generating article (1) into the receiving cavity (211), a distal end of the tubular body (21) having a bottom wall;

-an induction coil (22) arranged on said tubular body (21) for generating a varying magnetic field;

-a susceptor (23) capable of generating heat in a varying magnetic field for heating the aerosol-generating article (1) to generate an aerosol, the susceptor (23) being in a range penetrable by the varying magnetic field generated by the induction coil (22);

a magnetic shield (24) provided on the periphery of the susceptor (23) or below the tubular body (21);

wherein the magnetic shield (23) is configured to be adjustable and wherein a magnetic field penetrating the susceptor (23) is changed when the magnetic shield (23) is configured to be adjusted.

2. Aerosol-generating device according to claim 1, characterized in that the induction coil (22) is arranged around the susceptor (23), wherein the magnetic shield (24) is arranged at the periphery of the distal or proximal end of the tubular body (21) or the magnetic shield (24) is arranged below the distal end of the tubular body (21).

3. The aerosol-generating device according to claim 1, wherein the magnetic shield (24) comprises a support and a leaf (242), the leaf (242) having a shielding surface capable of blocking passage of magnetic induction lines for characterizing a magnetic field, the leaf (242) being rotatably arranged on the support and an area of the shielding surface blocking passage of the magnetic induction lines varying with rotation of the leaf (242).

4. An aerosol-generating device according to claim 3, characterized in that the magnetic shield (24) further comprises a rotation axis (243), the leaf (242) being arranged on the rotation axis (243), the rotation axis (243) being arranged on a support, the rotation axis (243) being capable of rotating the leaf (242) relative to the support, the rotation axis (243) being perpendicular to the longitudinal direction of the tubular body (21).

5. An aerosol-generating device according to claim 3, in which the support comprises two brackets (241) arranged opposite and parallel to each other, the leaf (242) being arranged between the two brackets (241) and being in rotational connection with the two brackets (241).

6. The aerosol-generating device according to claim 5, wherein the number of leaves (242) is at least two, the leaves (242) being rotatable between a first angle and a second angle, and wherein the leaves (242) are in a shielding position when the leaves (242) are rotated to the first angle, the spacing between the shielding surfaces of adjacent two of the leaves (242) being minimal, and wherein the leaves (242) are in an open position when the leaves (242) are rotated to the second angle, the spacing between the shielding surfaces of adjacent two of the leaves (242) being maximal.

7. An aerosol-generating device according to claim 6, wherein the shielding surfaces of adjacent two of the sheets (242) overlap locally in the longitudinal direction when the sheets (242) are in the shielding position.

8. An aerosol-generating device according to claim 6, wherein the shielding surface is at an angle of not more than 90 ° to the longitudinal direction of the tubular body (21) when the leaf (242) is in the shielding position.

9. An aerosol-generating device according to claim 6, wherein the shielding surface is at or near 0 ° to the longitudinal direction of the tubular body (21) when the leaf (242) is in the open position.

10. Aerosol-generating device according to claim 1, characterized in that the aerosol-generating device further comprises a temperature sensor for detecting the temperature of the susceptor (23) and a display connected to the temperature sensor for displaying the temperature of the susceptor (23).

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