An aerosol-generating device

Abstract

The present application provides an aerosol generating device, comprising: a tubular body having a receiving cavity therein, a proximal end of the tubular body being open for an aerosol generating article to enter, a distal end of the tubular body having a bottom wall; an induction coil combined on the tubular body for generating a varying magnetic field; a susceptor capable of generating heat in the varying magnetic field for heating the aerosol generating article to generate an aerosol, the susceptor being in a range capable of being penetrated by the varying magnetic field generated by the induction coil; and a magnetic shield provided at a periphery of the susceptor or connected with the tubular body; wherein the magnetic shield is configured to be adjustable, and the magnetic field penetrating the susceptor changes when the magnetic shield is adjusted. The present application adjusts the heating temperature of the susceptor by adjusting the magnetic shield, avoids the heating temperature of the susceptor out of control, and enables the aerosol generating device to continue to be used after the automatic control of the current in the induction coil fails.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of aerosol generation technology, in particular to an aerosol generating device. BACKGROUND

[0002] The aerosol generating device adopts an electric heating method to make the aerosol generating article produce aerosol for a user to smoke without being burned.

[0003] Among them, the heater in some aerosol generating devices adopts an induction heating method to heat the aerosol generating article, and adopts a software method to automatically control the heating temperature of the heater, usually by adjusting the size 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.

[0004] However, software control has a certain uncertainty, and there is a risk of software control failure in daily use. When the software control fails, the heater is likely to continue to heat up, which not only burns the aerosol generating article, but also has a considerable safety hazard. SUMMARY

[0005] The present application provides an aerosol generating device, which can adjust the magnetic field penetrating the susceptor through a magnetic shielding member, thereby controlling the heating temperature of the susceptor.

[0006] The present application provides an aerosol generating device, which comprises:

[0007] A tubular body having a containing cavity therein, a proximal end of the tubular body being open to allow an aerosol generating article to be inserted into the containing cavity, and a bottom wall at a distal end of the tubular body;

[0008] An induction coil arranged on the tubular body for generating a varying magnetic field;

[0009] A susceptor capable of generating heat in the varying magnetic field for heating the aerosol generating article to generate aerosol, the susceptor being in a range capable of being penetrated by the varying magnetic field generated by the induction coil;

[0010] A magnetic shielding member arranged on the periphery of the susceptor or below the tubular body;

[0011] Wherein, the magnetic shielding member is configured to be adjustable, and the magnetic field penetrating the susceptor changes when the magnetic shielding member is configured to be adjusted.

[0012] The present application has the following beneficial effects relative to the prior art:

[0013] The magnetic shield provided on the periphery of the tubular body or below the tubular body of the aerosol generating device of the present application is adjustable, and by adjusting the magnetic shield, the magnetic field passing through the susceptor can be adjusted, and in turn the heating temperature of the susceptor can be adjusted. Therefore, when the automatic control of the current size or current frequency flowing through the induction coil fails, the adjustment of the heating temperature of the susceptor can be completed by adjusting the magnetic shield, avoiding the problem of out of control of the heating temperature of the susceptor, so that after the automatic control of the current in the induction coil fails, the aerosol generating device can continue to be used to complete the smoking of at least one aerosol generating article. BRIEF DESCRIPTION OF DRAWINGS

[0014] One or more embodiments are illustrated by way of example in the figures that form a part of this patent document, these example are not to be construed as limiting the embodiments, elements having the same reference numbers in the figures indicate like elements, unless otherwise specifically noted, the figures in the drawings are not to scale.

[0015] Figure 1 is a schematic view of the aerosol generating device provided by an embodiment of the present application;

[0016] Figure 2 is a schematic view of the heating assembly provided by an embodiment of the present application;

[0017] Figure 3 is a top view of the magnetic shield in an open position provided by an embodiment of the present application;

[0018] Figure 4 is a front view of the magnetic shield in a shielding position provided by another embodiment of the present application;

[0019] Figure 5 is a front view of the magnetic shield in a shielding position provided by another embodiment of the present application;

[0020] in the figure:

[0021] 1, aerosol generating article;

[0022] 2, heating assembly; 21, tubular body; 211, accommodating cavity; 22, induction coil; 23, susceptor; 24, magnetic shield; 241, bracket; 242, leaf piece; 243, rotating shaft;

[0023] 3, power supply assembly; 31, power supply; 32, control circuit. DETAILED DESCRIPTION

[0024] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of the present application.

[0025] The terms "first", "second", "third" in the present application are only used for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number or sequence of the technical features indicated. All the directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used for explaining the relative position relationship or movement condition between components in a certain posture (as shown in the drawings), and if the posture changes, the directional indications will also change accordingly. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, the process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or units inherent to the process, method, product or device.

[0026] Reference herein to "an embodiment" means that a feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor does it necessarily refer to a particular embodiment in an exclusive sense. It is explicitly and implicitly understood that the embodiments described herein can be combined with other embodiments.

[0027] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0028] Please refer to Figure 1 An embodiment of the present application provides an aerosol generating device which can be used to heat an aerosol generating article 1 to cause the aerosol generating article 1 to emit an aerosol for smoking.

[0029] As used herein, the term "aerosol-generating article" refers to an article that includes an aerosol-forming substrate that, when heated, releases volatile compounds that form an aerosol. An "aerosol-generating article" refers to an article that includes an aerosol-forming substrate that is intended to be heated, rather than combusted, to release volatile compounds that form an aerosol. Aerosols formed by heating an aerosol-forming substrate can contain fewer components known to be harmful than aerosols generated by combusting or pyrolytically degrading an aerosol-forming substrate. In an embodiment, the aerosol-generating article can be removably inserted into an aerosol-generating device. The article can be disposable or reusable.

[0030] Reference can be made to Figure 1 The aerosol-generating article 1 includes an aerosol-forming substrate at a distal end and a mouthpiece at a proximal end for a user to hold in their mouth, the user drawing on the mouthpiece to draw aerosol. The distal end is the end furthest from the consumer's mouth and the proximal end is the end closest to the consumer's mouth.

[0031] The aerosol-forming substrate can be a solid aerosol-forming substrate. Alternatively, the aerosol-forming substrate can include both solid and liquid components. The aerosol-forming substrate can include tobacco. The aerosol-forming substrate can include a tobacco-containing material that contains volatile tobacco flavour compounds that are released from the substrate upon heating. The aerosol-forming substrate can include a non-tobacco material. The aerosol-forming substrate can include both a tobacco-containing material and a non-tobacco material.

[0032] The aerosol-generating article 1 can have an outer diameter of between about 5 mm and about 12 mm, for example between about 5.5 mm and about 8 mm. In an embodiment, the aerosol-generating article 1 has an outer diameter of 6 mm ± 10%.

[0033] The total length of the aerosol-generating article 1 can be between about 25 mm and about 100 mm. The total length of the aerosol-generating article 1 can be between about 30 mm and about 100 mm. In one embodiment, the total length of the aerosol-forming substrate is 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 45 mm. In yet another embodiment, the total length of the aerosol-forming substrate is about 33 mm.

[0034] As used herein, the term "aerosol-generating device" is a device that engages or interacts with the aerosol-generating article 1 to form an inhalable aerosol. An electrically heated aerosol-generating device is a device that includes a power supply assembly to supply energy to heat the aerosol-forming substrate to generate an aerosol.

[0035] The aerosol generating device can be described as a heating-type aerosol generating device, which is an aerosol generating device including a heating assembly 2. The heating assembly 2 is used to heat an aerosol generating substrate of the aerosol generating article 1 to generate an aerosol.

[0036] The aerosol generating device can include a power supply assembly 3 for supplying power to the heating assembly 2. The power supply assembly 3 can include any suitable power source 31, such as a DC source, such as a battery. In one embodiment, the power source 31 is a lithium ion battery. Alternatively, the power source 31 can 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 can include one or more control circuits 32, which can control the output of the power source 31, such as causing the power source 31 to output an alternating current or a direct current, or causing the power source 31 to output a current or voltage in pulses, for example.

[0037] The control circuit 32 can have one or more microprocessors or microcontrollers thereon.

[0038] The aerosol generating device also includes an air inlet passage that communicates between the outside and the heating assembly 2, through which air from the outside enters the heating assembly 2, and then enters the aerosol generating substrate 11 of the aerosol generating article 1, and finally enters the user's mouth through the mouthpiece.

[0039] The heating assembly 2 can be a constituent part of the aerosol generating article 1; or the heating assembly 2 can be a constituent part of the aerosol generating device; or part of the heating assembly 2 can be a constituent part of the aerosol generating article 1, and part can be a constituent part of the aerosol generating device. In the embodiment shown in FIG. 1, the heating assembly 2 forms a constituent part of the aerosol generating device. Figure 2

[0040] The heating assembly 2 can include 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 of the aerosol generating article when the aerosol generating system including 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 inside the aerosol generating article when the aerosol generating system including the aerosol generating article is assembled.

[0041] In the embodiment shown in FIG. 1, the heating assembly 2 is an external heating assembly. Figure 2 ​In the illustrated embodiment, the heating assembly 2 includes a tubular body 21, an induction coil 22, a sensor 23, and a magnetic shield 24. The tubular body 21 has an internal cavity 211 for containing the aerosol generating matrix 11 of the aerosol generating article 1. The induction coil 22 provides a varying magnetic field, and the sensor 23 is permeable by this varying magnetic field. The sensor 23 generates heat within the varying magnetic field, and the heat emitted by the sensor 23 heats the aerosol generating matrix 11, causing it to generate aerosols.

[0042] In one embodiment, the suitable material for the receptor 23 includes, but is not limited to, ferromagnetic materials, such as ferritic, ferromagnetic steel, or stainless steel; in one embodiment, the receptor material includes, but is not limited to, nickel-iron alloys. In one embodiment, the receptor material includes, but is not limited to, 400 series stainless steel, such as grade 410, 420, or 430 stainless steel.

[0043] exist Figure 2 In the illustrated embodiment, the receptor 23 may include an internal heater, which is generally rod-shaped, sheet-shaped, or needle-shaped, etc., to facilitate insertion into the aerosol generating article 1. At least a portion of the receptor 23 is located in a receiving cavity 211 inside the tubular body 21 to be inserted into the interior of the aerosol generating matrix 11 when the aerosol generating matrix 11 of the aerosol generating article 1 is located in the receiving cavity 211.

[0044] It is understood that in other embodiments, the sensor 23 may include an external heater that may be incorporated into the tubular body 21 and located on the periphery of the receiving cavity 211.

[0045] The induction coil 22 has one or more components. In one embodiment, the induction coil 22 is capable of generating a fluctuating electromagnetic field between 1 and 30 MHz, preferably between 2 and 10 MHz, and more preferably between 5 and 7 MHz. In one embodiment, the induction coil 22 is capable of generating a fluctuating electromagnetic field with a field strength (H-field) between 1 and 5 kA / m, for example between 2 and 3 kA / m, such as about 2.5 kA / m.

[0046] Please refer to Figure 2 The 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 another embodiment, at least a portion of the induction coil 22 is embedded in the outer surface of the tubular body 21; in yet another embodiment, the induction coil 22 is located in the wall of the tubular body 21; and in one embodiment, the induction coil 22 is attached to the inner surface of the tubular body 21.

[0047] Magnetic induction lines are used to characterize the magnetic field generated by the induction coil 22 under alternating current. The changing magnetic field penetrates the sensing element 23, which is reflected in at least some of the magnetic induction lines passing through the sensing element 23. Moreover, the more magnetic induction lines that pass through the sensing element 23 and the greater their density, the greater the induced current and hysteresis formed in the sensing element 23, and thus the higher the heating efficiency of the sensing element 23.

[0048] like Figure 2 As shown, the end of the tubular body 21 closest to the nozzle is the proximal end, which is open. The aerosol-generating product 1 enters the receiving cavity 211 through the proximal end of the tubular body 21. The distal end of the tubular body 21 is positioned opposite its proximal end. The induction coil 22 is roughly tubular and is disposed on the tubular body 21 and around the sensor 23. Magnetic induction lines enter the tubular body 21 from the proximal end and exit from the distal end, or enter the tubular body 21 from the distal end and exit from the proximal end. The sensor 23 located inside the tubular body 21 heats up under the magnetic induction lines entering and exiting the tubular body 21.

[0049] The magnetic shield 24 can restrict the magnetic field generated by the induction coil 22. The magnetic shield 24 is set on the periphery of the sensor 23 or below the tubular body 21. The magnetic shield 24 can reduce the number or density of magnetic induction lines passing through the sensor 23, thereby weakening the magnetic field strength penetrating the sensor 23.

[0050] In one embodiment, the suitable material for fabricating the magnetic shield 24 includes, but is not limited to, ferromagnetic materials, such as ferrite, ferromagnetic steel, or stainless steel; in another embodiment, the material for fabricating the magnetic shield 24 includes, but is not limited to, nickel-iron alloy. In yet another embodiment, the material for fabricating the magnetic shield 24 includes, but is not limited to, 400 series stainless steel, such as grade 410, 420, or 430 stainless steel.

[0051] The magnetic shielding element 24 is configured to be adjustable. In one embodiment, the magnetic shielding element 24 is adjustable in that it can be displaced within the aerosol generating apparatus. By adjusting its position within the aerosol generating apparatus, the magnetic shielding element 24 can shield at least a portion of the magnetic field penetrating the sensor 23, thereby weakening the magnetic field passing through the sensor 23 or reducing the number or density of magnetic field lines passing through the sensor 23. In another embodiment, the magnetic shielding element 24 is adjustable in that it can be opened and closed, allowing the area of ​​the magnetic shielding element 24 used to shield the magnetic field to vary. By adjusting the shielding area of ​​the magnetic shielding element 24, the magnetic field penetrating the sensor 23 is adjusted, thereby changing the magnetic field passing through the sensor 23 or changing the number or density of magnetic field lines passing through the sensor 23. Therefore, when the magnetic shielding element 24 is adjusted, the magnetic field penetrating the sensor 23 changes accordingly.

[0052] In order to facilitate the adjustment of the magnetic shield 24, the magnetic shield 24 can be arranged at the periphery of the distal end or the proximal end of the tubular body 21, or the magnetic shield 24 can be arranged below the distal end of the tubular body 21, so as to block the magnetic induction lines penetrating into or out of the susceptor 23, thereby breaking the closed loop of the magnetic induction lines, and reducing the magnetic field environment of the susceptor 23 and the heating efficiency of the susceptor 23.

[0053] The magnetic shield 24 can be opened and closed, and will be described in detail below.

[0054] Please refer to Figures 2-5 , the magnetic shield 24 includes a support and a leaf 242, the leaf 242 has a shielding surface capable of blocking the magnetic induction lines, and the leaf 242 is rotatably arranged on the support. When the leaf 242 is rotated, the area of the shielding surface blocking the magnetic induction lines can be changed, and this area is the shielding area. The shielding area changes with the rotation of the leaf 242. The larger the shielding area is, the weaker the magnetic field penetrating the susceptor 23 is, and the lower the heating efficiency of the susceptor 23 is. The smaller the shielding area is, the stronger the magnetic field penetrating the susceptor 23 is, and the higher the heating efficiency of the susceptor 23 is.

[0055] In an embodiment, please refer to Figure 3 , the support includes two supports 241 arranged oppositely and parallel to each other, and the leaf 242 is arranged between the two supports 241, and the leaf 242 is rotatably connected with the two supports 241.

[0056] The magnetic shield 24 includes a rotating shaft 243, the rotating shaft 243 is connected with the leaf 242, and opposite ends of the rotating shaft 243 are inserted into or even through the corresponding supports 241. When the rotating shaft 243 rotates, the leaf 242 rotates synchronously, and the leaf 242 is rotatably connected with the supports 241 through the rotating shaft 243.

[0057] In an embodiment, the leaf 242 has only one piece, which can be rotated between 0-180° or 0-360°. When the shielding surface of the only one piece of the leaf 242 is rotated to be perpendicular to the longitudinal direction of the tubular body 21, the shielding area reaches the maximum. When the shielding surface of the only one piece of the leaf 242 is rotated to be parallel to the longitudinal direction of the tubular body 21, the shielding area reaches the minimum.

[0058] In an embodiment, the plurality of leaflets 242 are rotatable between a first angle and a second angle. When the plurality of leaflets 242 are all rotated to the first angle, the plurality of leaflets 242 are in a shielding position, the spacing between the shielding surfaces of adjacent leaflets 242 is the smallest, and the magnetic field shielding effect on the susceptor 23 is the strongest. When the plurality of leaflets 242 are rotated to the second angle, the plurality of leaflets 242 are in an open position, the spacing between the shielding surfaces of adjacent leaflets 242 is the largest, and the magnetic field shielding effect on the susceptor 23 is the weakest.

[0059] In an embodiment as shown in FIG. 2, the plurality of leaflets 242 are rotatable between a first angle and a second angle. When the plurality of leaflets 242 are all rotated to the first angle, the plurality of leaflets 242 are in a shielding position, the spacing between the shielding surfaces of adjacent leaflets 242 is the smallest, and the magnetic field shielding effect on the susceptor 23 is the strongest. When the plurality of leaflets 242 are rotated to the second angle, the plurality of leaflets 242 are in an open position, the spacing between the shielding surfaces of adjacent leaflets 242 is the largest, and the magnetic field shielding effect on the susceptor 23 is the weakest. Figure 4 In an embodiment as shown in FIG. 2, when the plurality of leaflets 242 are in the shielding position, the shielding surfaces of adjacent leaflets 242 partially overlap in the longitudinal direction. In this way, the shielding surfaces of adjacent leaflets 242 can be spaced apart to avoid collision or friction between the leaflets 242. Meanwhile, when the plurality of leaflets 242 are in the shielding position, the angle between the shielding surface of each leaflet 242 and the longitudinal direction of the tubular body 21 is greater than 0° and less than 90°. Although the shielding area of each leaflet 242 does not reach the maximum, the rotation angle of the leaflets 242 can be reduced, which facilitates the rotation control of the leaflets 242.

[0060] In an embodiment as shown in FIG. 2, when the plurality of leaflets 242 are in the open position, the angle between the shielding surface and the longitudinal direction of the tubular body 21 is equal to or close to 0°, and the shielding surface is parallel or nearly parallel to the longitudinal direction of the tubular body 21. Figure 3 In an embodiment, the aerosol generating device further comprises a temperature sensor configured to detect the temperature of the susceptor 23. The temperature sensor is connected to the control circuit 32, and feeds back the detected temperature of the susceptor 23 to the control circuit 32. The control circuit 32 takes the current temperature of the susceptor 23 as the basis for adjusting the temperature of the susceptor 23 at the next moment. If the current temperature is too high, the control circuit 32 reduces the current size or frequency in the induction coil 22 to reduce the heating efficiency of the susceptor 23, thereby preventing the temperature of the susceptor 23 from continuously being too high. If the current temperature is too low, the control circuit 32 increases the current size or frequency in the induction coil 22 to increase the heating efficiency of the susceptor 23, thereby increasing the temperature of the susceptor 23 to sufficiently roast the aerosol generating substrate.

[0061] In an embodiment, the aerosol generating device further comprises a temperature sensor configured to detect the temperature of the susceptor 23. The temperature sensor is connected to the control circuit 32, and feeds back the detected temperature of the susceptor 23 to the control circuit 32. The control circuit 32 takes the current temperature of the susceptor 23 as the basis for adjusting the temperature of the susceptor 23 at the next moment. If the current temperature is too high, the control circuit 32 reduces the current size or frequency in the induction coil 22 to reduce the heating efficiency of the susceptor 23, thereby preventing the temperature of the susceptor 23 from continuously being too high. If the current temperature is too low, the control circuit 32 increases the current size or frequency in the induction coil 22 to increase the heating efficiency of the susceptor 23, thereby increasing the temperature of the susceptor 23 to sufficiently roast the aerosol generating substrate.

[0062] In an embodiment, the aerosol generating device further comprises a temperature sensor configured to detect the temperature of the susceptor 23. The temperature sensor is connected to the control circuit 32, and feeds back the detected temperature of the susceptor 23 to the control circuit 32. The control circuit 32 takes the current temperature of the susceptor 23 as the basis for adjusting the temperature of the susceptor 23 at the next moment. If the current temperature is too high, the control circuit 32 reduces the current size or frequency in the induction coil 22 to reduce the heating efficiency of the susceptor 23, thereby preventing the temperature of the susceptor 23 from continuously being too high. If the current temperature is too low, the control circuit 32 increases the current size or frequency in the induction coil 22 to increase the heating efficiency of the susceptor 23, thereby increasing the temperature of the susceptor 23 to sufficiently roast the aerosol generating substrate.

[0063] When the aerosol generating device is in normal state, the magnetic shield 24 is in the state of minimum shielding area or the leaf 242 is in the open position, so that the magnetic shield 24 has the weakest magnetic field shielding effect on the susceptor 23.

[0064] When the aerosol generating device is in abnormal state, i.e. when the temperature feedback of the temperature sensor or the current control of the induction coil 22 fails in the control circuit 32, the magnetic field penetrating the susceptor 23 is adjusted by adjusting the magnetic shield 24, so as to adjust the temperature of the susceptor 23.

[0065] In an embodiment, the magnetic shield 24 is connected with a driving device such as a motor or an electric machine, which can drive the rotation of the leaf 242 or the displacement of the magnetic shield 24, so as to adjust the magnetic shield 24. The driving device is connected with the control circuit 32, which automatically adjusts the magnetic shield 24 by controlling the driving device.

[0066] In an embodiment, the magnetic shield 24 is connected with a transmission device such as a gear or a connecting rod, which is partially exposed outside the aerosol generating device, so that the user can manually drive the rotation of the leaf 242 or the displacement of the magnetic shield 24 by the driving device, so as to adjust the magnetic shield 24.

[0067] The aerosol generating device further comprises a display, which can remind the user of the abnormality and prompt the user to manually adjust the temperature of the susceptor 23. The temperature sensor is connected with the display, which can display the temperature of the susceptor 23. The user can manually adjust the magnetic shield 24 according to the temperature displayed on the display, so as to adjust the temperature of the susceptor 23.

[0068] The aerosol generating device described above has an adjustable magnetic shield arranged at the periphery of the susceptor or below the tubular body. By adjusting the magnetic shield, the magnetic field penetrating the susceptor can be adjusted, so as to adjust the heating temperature of the susceptor. Therefore, when the automatic control of the current size or the current frequency flowing through the induction coil fails, the adjustment of the heating temperature of the susceptor can be completed by adjusting the magnetic shield, so as to avoid the out-of-control of the heating temperature of the susceptor. After the automatic control of the current in the induction coil fails, the aerosol generating device can still be used to complete the smoking of at least one aerosol generating article.

[0069] It should be noted that the specification and drawings of the present application give the preferred embodiments of the present application, but are not limited to the embodiments described in the specification. Further, those skilled in the art can make improvements or modifications according to the above description, and all these improvements and modifications shall fall within the protection scope of the appended claims of the present application.

Claims

1. An aerosol-generating device, characterized by, The application relates to a heating device for an aerosol-generating article, comprising: a tubular body (21) having a receiving cavity (211) inside, a proximal end of the tubular body (21) being open for insertion of an aerosol-generating article (1) into the receiving cavity (211), and a bottom wall at a distal end of the tubular body (21); an induction coil (22) arranged on the tubular body (21) for generating a varying magnetic field; a susceptor (23) capable of being heated in the varying magnetic field for heating the aerosol-generating article (1) to generate an aerosol, the susceptor (23) being in a range capable of being penetrated by the varying magnetic field generated by the induction coil (22); a magnetic shield (24) arranged on a periphery of the susceptor (23) or below the tubular body (21); wherein the magnetic shield (24) is configured to be adjustable, and the magnetic field penetrating the susceptor (23) changes when the magnetic shield (24) is adjusted.

2. The aerosol-generating device of claim 1, wherein, The induction coil (22) is arranged around the susceptor (23), wherein the magnetic shield (24) is arranged on a periphery of the distal end or the 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 of claim 1, wherein, The magnetic shield (24) comprises a support and a leaf (242), the leaf (242) having a shielding surface capable of preventing a magnetic induction line for characterizing a magnetic field from passing through, the leaf (242) being rotatably arranged on the support, and an area of the shielding surface preventing the magnetic induction line from passing through changes with rotation of the leaf (242).

4. The aerosol-generating device of claim 3, wherein, The magnetic shield (24) further comprises a rotating shaft (243), the leaf (242) being arranged on the rotating shaft (243), the rotating shaft (243) being arranged on the support, the rotating shaft (243) being capable of rotating the leaf (242) relative to the support, and the rotating shaft (243) being perpendicular to a longitudinal direction of the tubular body (21). 5.The aerosol generating device of claim 3, wherein, The support comprises two supports (241) arranged oppositely and parallel to each other, the leaf (242) being arranged between the two supports (241) and being rotatably connected with the two supports (241).

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

7. The aerosol-generating device of claim 6, wherein, When the leaf (242) is in the shielding position, the shielding surfaces of two adjacent leaves (242) partially overlap in the longitudinal direction.

8. The aerosol-generating device of claim 6, wherein, When the leaf (242) is in the shielding position, an angle between the shielding surface and the longitudinal direction of the tubular body (21) is not greater than 90 degrees. 9.The aerosol-generating device of claim 6, wherein, When the leaf (242) is in the open position, an angle between the shielding surface and the longitudinal direction of the tubular body (21) is equal to or close to 0 degrees. 10.The aerosol-generating device of claim 1, wherein, The aerosol generating device further includes a temperature sensor for detecting a temperature of the susceptor (23) and a display connected to the temperature sensor to display the temperature of the susceptor (23).

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