Aerosol-generating device

Abstract

The present application relates to an aerosol-generating device comprising: a holder in which a holding cavity having an open end is provided, the holding cavity for receiving a portion of an aerosol-generating product; the heating pipe is used for being received in the other part of the aerosol generating product, the heating pipe comprises a main body part and a connecting part connected with the holding piece, and an insertion hole allowing the aerosol generating product to penetrate through is defined in the connecting part; the inner wall of the heating pipe is provided with a guide inclined plane which gradually converges towards the central axis of the heating pipe in the insertion direction of the aerosol generating product, and the guide inclined plane defines at least part of the boundary of the insertion hole or is arranged between the connecting part and the main body part; wherein at least one part of the connecting part of the heating pipe is positioned in the retainer, or the end part of the retainer is positioned in the insertion hole.

Description

Technical Field

[0001] The present application relates to the technical field of aerosol generation, and in particular to an aerosol generating device. Background Art

[0002] An aerosol generating device is a device that can generate aerosol from a smoking product.

[0003] In some exemplary prior art, the aerosol generating device includes a housing, a heating tube and an upper end cover with an insertion hole, the heating tube and the upper end cover are both arranged in the housing, and the tobacco product needs to pass through the insertion hole on the upper end cover before it can be inserted into the heating tube. However, the assembly drop between the heating tube and the upper end cover will affect the insertion of the tobacco product from the upper end cover into the heating tube. If the inner diameter of the heating tube is increased to facilitate the insertion of the tobacco product into the heating tube, the heating efficiency of the heating tube on the tobacco product will be reduced due to the increase in the interval between the inner wall of the heating tube and the tobacco product. Utility Model Content

[0004] The purpose of the present application is to provide an aerosol generating device, which can facilitate the insertion of an aerosol generating product into a heating tube without reducing the heating efficiency of the heating tube on the aerosol generating product.

[0005] An aerosol generating device provided in an embodiment of the present application includes:

[0006] a holder having a holding cavity having an open end disposed therein, the holding cavity being adapted to receive a portion of the aerosol-generating article; and

[0007] a heating tube, for receiving another part of the aerosol generating article, the heating tube comprising a main body and a connecting part connected to the retaining member, the connecting part defining an insertion hole for the aerosol generating article to pass through, the inner wall of the heating tube having a guiding slope that gradually converges toward the central axis of the heating tube along the insertion direction of the aerosol generating article, the guiding slope defining at least a part of the boundary of the insertion hole or being arranged between the connecting part and the main body;

[0008] Wherein, at least a part of the connection portion of the heating tube is located in the retaining member, or an end portion of the retaining member is located in the insertion hole.

[0009] As an example, the retaining member includes an inner tube and an outer tube, the inner tube defines at least a portion of the boundary of the retaining cavity, and the outer tube is at least partially disposed on the periphery of the inner tube;

[0010] The aerosol generating device further comprises a first sealing ring, which is arranged between the outer tube and the connecting portion and provides a sealing connection between the outer tube and the connecting portion.

[0011] As an example, the distal end of the outer tube has a support portion extending approximately laterally, the end of the connecting portion has an abutment portion extending approximately laterally, and the first sealing ring is arranged between the support portion and the abutment portion and is supported by the support portion or abutted by the abutment portion.

[0012] As an example, the abutment portion supports the distal end of the inner tube; or

[0013] The abutment portion is located inside the outer tube.

[0014] As an example, the aerosol generating device further includes a second sealing ring, which is disposed between the outer tube and the inner tube and provides a sealing connection between the outer tube and the inner tube.

[0015] As an example, the aerosol generating device comprises a clamping member fixed to the retaining member, wherein at least a portion of the clamping member protrudes into the retaining cavity for clamping the aerosol generating article.

[0016] As an example, the insertion hole gradually converges toward the central axis of the heating tube along the insertion direction, and the inclination of the wall surface of the insertion hole is greater than the inclination of the guiding inclined surface; or

[0017] The insertion holes have uniform diameters.

[0018] As an example, the proximal end of the connecting portion is located in the retaining member, and the diameter of the distal end of the retaining cavity arranged opposite to the open end thereof is greater than or equal to the hole diameter of the proximal end of the insertion hole.

[0019] As an example, the inner diameter of the main body is uniform.

[0020] As an example, at least a portion of the heating tube is configured to be able to generate inductive heat in a changing magnetic field, and the aerosol generating device further includes an induction coil for generating a changing magnetic field; wherein

[0021] The main body is located in the encirclement of the induction coil; or

[0022] The guiding slope is located in the encirclement of the induction coil; or

[0023] The proximal end of the heating tube is located within the encirclement of the induction coil; or

[0024] The insertion hole is located in the surround of the induction coil.

[0025] As an example, the extending length of the guiding slope in the longitudinal direction is greater than or equal to 0.5 mm; or

[0026] The connecting portion has a longitudinal extension length greater than or equal to 1 mm; or

[0027] A longitudinal distance between the proximal end of the heating tube and the main body is greater than or equal to 1.5 mm.

[0028] As an example, the aerosol generating device further includes a first thermal insulation layer arranged around the heating tube and a second thermal insulation layer arranged around the first thermal insulation layer, and the induction coil is arranged between the first thermal insulation layer and the second thermal insulation layer.

[0029] As an example, the aerosol generating device further includes a shell, and the second heat insulating layer is disposed in close contact with at least a portion of an inner wall surface of the shell.

[0030] As an example, the heating tube comprises a clamping portion for clamping the aerosol-generating article, the clamping portion being disposed adjacent to the distal end of the heating tube.

[0031] The above aerosol generating device includes a heating tube and a retaining member, both of which can retain a part of the aerosol generating product, the heating tube includes a main body and a connecting portion connected to the retaining member, the connecting portion is defined with an insertion hole for the aerosol generating product to pass through, the inner wall of the heating tube has a guiding slope that gradually converges toward the central axis of the heating tube along the insertion direction, the guiding slope defines at least part of the boundary of the insertion hole or the guiding slope is arranged between the connecting portion and the main body, wherein at least part of the connecting portion of the heating tube is located in the retaining member, or the end of the retaining member is located in the insertion hole. Thus, the assembly drop problem between the heating tube and the retaining member can be overcome, so that the aerosol generating product can be inserted into the heating tube more easily through the retaining member, and through the guiding slope, there is no need to change the inner diameter of the main body or the size of the area enclosed by it, so that the main body can maintain a high heating efficiency for the aerosol generating product. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0033] Figure 1 is a schematic diagram of an aerosol generating device provided in one embodiment of the present application;

[0034] Figure 2 is an assembly diagram of a heating tube and a retaining member provided in one embodiment of the present application;

[0035] Figure 3is a three-dimensional schematic diagram of a heating tube provided in one embodiment of the present application;

[0036] Figure 4 is a cross-sectional view of a heating tube provided in one embodiment of the present application;

[0037] Figure 5 is a cross-sectional schematic diagram of an aerosol generating device provided in one embodiment of the present application;

[0038] In the figure:

[0039] 1. aerosol generating product; 11. aerosol generating substrate; 12. cooling section; 13. nozzle;

[0040] 2. Heating tube; 21. Main body; 22. Guide slope; 23. Connecting part; 231. Insertion hole; 232. Abutting part; 24. Clamping part;

[0041] 3. Power supply assembly; 31. Power supply; 32. Circuit board;

[0042] 4. holding member; 41. outer tube; 411. support portion; 42. inner tube; 421. holding cavity;

[0043] 5. Shell; 6. End cover; 7. Base; 8. Air inlet channel; 91. First sealing ring; 92. Second sealing ring; 10. Clamping piece; 1A. Induction coil; 2A. Gap; 1B. First thermal insulation layer; 2B. Second thermal insulation layer. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] The terms "first", "second", "third" in the present application are only used for descriptive purposes, and cannot be understood as indicating or suggesting relative importance or implicitly indicating the quantity or order of the indicated technical features. In the present application embodiment, all directional indications (such as up, down, left, right, front, back ...) are only used to explain the relative position relationship or movement between the components under a certain specific posture (as shown in the accompanying drawings), and if the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, the process, method, system, product or equipment comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or equipment.

[0046] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0047] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be one or more central elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0048] Please refer to Figure 1 One embodiment of the present application provides an aerosol generating device, which can receive an aerosol generating product 1 and can volatilize an aerosol generating matrix in the aerosol generating product 1 to generate an aerosol.

[0049] Aerosol formation substrate 11 is a kind of material that can produce aerosol under the effect of ultrasonic wave, microwave when temperature rises.Aerosol formation substrate 11 can be the volatile compound that intention is heated rather than burning to release to form aerosol.Aerosol formation substrate 11 can be solid form, for example can be the integrated thing that tobacco shred, tobacco leaf or cigarette particle phase gather and form.Aerosol formation substrate 11 can comprise tobacco-containing material, and described tobacco-containing material contains the volatile tobacco flavor compound that releases from described substrate when heating, or described tobacco-containing material is the material that contains nicotine.Aerosol formation substrate 11 can comprise containing non-tobacco material.Aerosol formation substrate 11 can contain tobacco-containing material and non-tobacco material simultaneously.

[0050] The aerosol-generating article 1 may be a rod-shaped structure extending in the longitudinal direction, and may include a mouthpiece 13. When the aerosol-generating article 1 is coupled to the aerosol-generating device, at least a portion of the mouthpiece 13 is exposed outside the aerosol-generating device for the user to hold in the mouth, and the user may inhale the aerosol generated by the aerosol-forming substrate 11 by sucking on the mouthpiece 13. The direction in which the aerosol-generating article 1 is inserted into the aerosol-generating device is substantially parallel to the longitudinal direction.

[0051] The aerosol generating product 1 may further include a cooling section 12, which is disposed between the mouthpiece 13 and the aerosol forming substrate 11, and is used to introduce the aerosol generated by the aerosol forming substrate 11 into the mouthpiece 13. The temperature of the aerosol will decrease after passing through the cooling section 12 to prevent the temperature of the aerosol inhaled into the oral cavity of the user from being too high and burning the mouth.

[0052] In some embodiments of the present application, the aerosol generating device includes a heating component, and the aerosol generating substrate 11 is heated mainly by releasing heat from the heating component, so that the aerosol generating substrate 11 generates aerosol. In one embodiment, the heating component includes an external heating element, and the "external heating element" described in the present application refers to a heating element that is at least partially located outside the aerosol generating product 1 when the aerosol generating product 1 is coupled with the aerosol generating device, so as to heat the aerosol generating product 1 outside the aerosol generating product 1. For example, the external heating element includes a heating tube 2, and when the aerosol generating product 1 is coupled with the aerosol generating device, at least a portion of the aerosol generating substrate 11 is accommodated in the heating tube 2, so as to be heated by the heat released by the heating tube 2. Of course, the aerosol generating device may also include an internal heating element, and the "internal heating element" described in the present application refers to a heating element that is at least partially located inside the aerosol generating product 1 when the aerosol generating product 1 is coupled with the aerosol generating device, so as to heat the aerosol generating product 1 inside the aerosol generating product 1. The aerosol generating device may further include an air heating element. The "air heating element" mentioned in the present application refers to a heating element for heating the aerosol generating product 1, which is arranged upstream of the aerosol generating product 1 along the direction in which the air flow enters the aerosol generating product 1, and heats the air flowing through it into hot air, and then heats the aerosol generating product 1 by allowing the hot air to flow into the aerosol generating product 1.

[0053] In an embodiment including a heating tube 2, the heating tube 2 extends longitudinally so that at least a portion of the aerosol generating article 1 can be inserted into the heating tube 2 along an insertion direction substantially parallel to the longitudinal direction, so that at least a portion of the aerosol generating article 1 can be received in the heating tube 2.

[0054] The aerosol generating device may be an electrically operated device, and thus may include a power supply assembly 3, which is electrically connected to the heating assembly to provide power for the heating assembly to release heat to heat the aerosol generating substrate 11. The power supply assembly 3 may include a power supply 31, which may be any suitable battery, such as a lithium battery, etc. The power supply assembly 3 may also include a circuit board 32, which is electrically connected to the power supply 31 and may control the power output of the power supply 31. Of course, the circuit board 32 may also control the aerosol generating device to realize other functions, such as controlling the corresponding sensor in the aerosol generating device to detect or identify the aerosol generating article 1, such as controlling the sensory prompt device in the aerosol generating device to send a sensory prompt signal, etc.

[0055] Please refer to Figure 2 and Figure 3The aerosol generating device further comprises a retaining member 4, wherein the retaining member 4 has a retaining cavity 421 therein, and the retaining cavity 421 is used to retain a portion of the longitudinally extending aerosol generating product 1, wherein the retaining cavity 421 extends in the longitudinal direction, and the proximal end of the retaining cavity is an open end, so that at least a portion of the aerosol generating product 1 can be inserted into the retaining cavity 421 from the open end along an insertion direction substantially parallel to the longitudinal direction. At least a portion of the heating tube 2 can be staggered from the retaining 421 in the insertion direction, so that when the aerosol generating product 1 is engaged with the aerosol generating device, a portion of the aerosol generating product 1 is retained in the retaining cavity 421, and a portion of the aerosol generating product 1 is retained in the heating tube 2, and the aerosol generating product 1 retained in the heating tube 2 needs to pass through the retaining cavity 421 first.

[0056] In some embodiments of the present application, the heating tube 2 includes a main body 21 and a connecting portion 23, and the connecting portion 23 is defined with an insertion hole 231 for the aerosol generating product 1 to pass through, and the insertion hole 231 allows the aerosol generating product 1 to be inserted into the main body 21 along the above-mentioned insertion direction. At the same time, the inner wall surface of the heating tube 23 has a guide slope 22, and the guide slope 22 defines at least a portion of the boundary of the insertion hole 231 or the guide slope 22 is arranged between the connecting portion 23 and the main body 21. The guiding bevel 22 in the heating tube 2 of the present application gradually converges toward the central axis of the heating tube 2 along the insertion direction. In other words, from the proximal end of the guiding bevel 22 to the distal end of the guiding bevel 22, the inner diameter of the guiding bevel 22 gradually decreases, or the area enclosed by the guiding bevel 22 gradually decreases, so that the guiding bevel 22 is roughly an inverted truncated cone or a prism shape, and the proximal inner diameter of the guiding bevel 22 is larger than the inner diameter of the main body 21, or the area enclosed by the proximal end of the guiding bevel 22 is larger than the area enclosed by the inner wall surface of the main body 21. Among them, the guide slope 22 defines at least part of the boundary of the insertion hole 231 or the guide slope 22 is arranged between the connecting part 23 and the main body 21, and the proximal end of the connecting part 23 is located in the retaining member 4, or the end of the retaining member 4, such as the distal end, is located in the insertion hole 231, thereby being able to overcome the assembly drop problem between the retaining member 4 and the heating tube 2 in the longitudinal direction, and facilitating the insertion of the aerosol generating product 1 into the main body 21 without increasing the size of the inner wall surface of the main body 21, thereby preventing the bottom (distal end) of the aerosol generating product 1 from being stopped by the proximal end of the heating tube 2 when the aerosol generating product 1 enters the heating tube 2 from the retaining cavity 421.

[0057] The distal end of the guiding slope 22 and the inner wall of the main body 21 may be connected in a streamlined manner without a clear boundary. Of course, there may also be a clear sharp edge between the distal end of the guiding slope 22 and the inner wall of the main body 21 .

[0058] Please refer to Figure 1 and Figure 5The aerosol generating device further comprises a housing 5, which can be held by a user. The retaining member 4 and the heating tube 2 are both disposed in the housing 5. Compared with the heating tube 5, the retaining member 4 can be closer to the proximal end of the housing 5. The aerosol generating device can further comprise an end cap 6, which is disposed at the proximal end of the housing 5 and has a through hole connected to the retaining cavity 421. The through hole provides an entrance for the aerosol generating article 1 to be inserted into the retaining cavity 421 along the insertion direction. In some embodiments, the end cap 6 is a component of the retaining member 4 and can be integrally injection molded with the retaining member 4. In some embodiments, reference can be made to Figure 1 , the retaining member 4 is assembled with the end cover 6.

[0059] The aerosol generating device may further include a base 7, which is connected to the distal end of the heating tube 2 and supports the heating tube 2. When at least a portion of the aerosol generating product 1 is retained in the heating tube 2, the base 7 may support the distal end (i.e., the bottom) of the aerosol generating product 1, but the invention is not limited thereto. For example, the heating tube 2 may also have a laterally extending supporting portion, and the supporting portion is used to support the distal end of the aerosol generating product 1.

[0060] The aerosol generating device has an air inlet channel 8 for guiding external air into the heating tube 2. In order to make the inner wall surface of the main body 21 have a smaller size, when at least a part of the aerosol generating product 1 is kept in the heating tube 2, the gap between the inner wall surface of the main body 21 and the aerosol generating product 1 is not greater than 0.15 mm, or the inner wall surface of the main body 21 is in contact with the aerosol generating product 1, so as to improve the heat transfer efficiency between the heating tube 2 and the aerosol generating product 1. Preferably, the air inlet channel 8 is arranged outside the heating tube 2 and the flow The main body 21 is connected to the distal end of the heating tube 2, and the air inlet channel 8 is used to guide the outside air to enter the heating tube 2 from the distal end of the heating tube 8, so as to reduce the amount of air flowing between the inner wall surface of the main body 21 and the aerosol generating product 1, or prevent the air flow from flowing between the inner wall surface of the main body 21 and the aerosol generating product 1, so as to improve the heating efficiency of the main body 21 on the aerosol generating product 1, and at the same time avoid the increase of the inhalation resistance, so that when the user inhales, a proper amount of air from the outside can enter the aerosol generating product 1. Among them, at least part of the air inlet channel 8 can be located in the base 7. The air inlet of the air inlet channel 8 can be set at the distal end of the aerosol generating device, and of course it can also be set at the proximal end of the aerosol generating device. The present application does not limit the position and number of the air inlet of the air inlet channel 8, nor does it limit the track of the air inlet channel 8.

[0061] The inner diameter of the main body 21 may be uniform, that is, along the insertion direction, the inner diameter of the main body 21 may remain substantially unchanged.

[0062] In some embodiments, the heating tube 2 can clamp the aerosol generating article 1 to prevent the user from causing the aerosol generating article 1 to move longitudinally when the user inhales the aerosol generating article 1. As an example, when the aerosol generating article 1 is inserted into the main body 21, the main body 21 can squeeze the aerosol generating article 1, thereby clamping the aerosol generating article 1. As an example, refer to Figure 2-Figure 4 The heating tube 21 includes a clamping portion 24 for clamping the aerosol generating article 1. The clamping portion is disposed adjacent to the distal end of the heating tube, so that the clamping portion 24 can clamp the side wall of the aerosol generating article 1 near its distal end. In order to facilitate the insertion of the aerosol generating article 1 into the main body 21, it is preferred that the inner diameter of the main body 21 is substantially equal to the outer diameter of the aerosol generating article 1, or slightly larger than the outer diameter of the aerosol generating article 1, but the gap between the two does not exceed 0.15 mm.

[0063] In one embodiment, reference may be made to Figure 1 and Figure 2 The retaining member 4 includes an inner tube 42 and an outer tube 41, the inner tube 42 defines at least a portion of the boundary of the retaining cavity 421, and the outer tube 41 is at least partially arranged on the periphery of the inner tube 42. The aerosol generating device also includes a first sealing ring 91, which is arranged between the outer tube 41 and the connecting portion 23 and provides a sealing connection between the outer tube 41 and the connecting portion 23. On the one hand, the retaining member 4 can fix the heating tube 2 through the outer tube 41 and the first sealing ring 91, and on the other hand, the first sealing ring 91 can prevent the aerosol from leaking from the connection between the outer tube 41 and the connecting portion 23.

[0064] Furthermore, the distal end of the outer tube 41 has a substantially transversely extending support portion 411, the proximal end of the connecting portion 23 has a substantially transversely extending abutment portion 232, and the first sealing ring 91 is disposed between the support portion 411 and the abutment portion 232, and is supported by the support portion 411 or abutted by the abutment portion 232. Figure 1 In the illustrated embodiment, the abutment portion 232 is located in the outer tube 41, and the support portion 411 indirectly supports the abutment portion 232 by supporting the first sealing ring 91, thereby preventing the abutment portion 232 from detaching from the outer shell 5 along the insertion direction of the aerosol generating product 1, so that the proximal end of the heating tube 2 can be maintained in the outer tube 41.

[0065] The abutting portion 232 can support the distal end of the inner tube 42 in the outer tube 41 . Of course, the abutting portion 232 can also be disposed in the outer tube 41 at a distance from the distal end of the inner tube 42 .

[0066] In one embodiment, please refer to Figure 1The aerosol generating device may further include a second sealing ring 92, which is disposed between the outer tube 41 and the inner tube 42 and provides a sealing connection between the outer tube 41 and the inner tube 42. On the one hand, the outer tube 41 can fix the inner tube 42 through the second sealing ring 92, and on the other hand, the second sealing ring 92 can prevent the aerosol from leaking from between the outer tube 41 and the inner tube 42.

[0067] Part of the inner surface of the inner tube 42 may be arched toward the central axis of the holding cavity 421, so as to clamp the aerosol generating product 1 when the aerosol generating product 1 is connected to the aerosol generating device, and prevent the aerosol generating product 1 from being displaced when being inhaled by the user. Figure 1 and Figure 2 In the illustrated embodiment, the aerosol generating device comprises a clamping member 10 fixed to the retaining member 4, and at least a portion of the clamping member 10 protrudes into the retaining cavity 421, and is used to clamp the aerosol generating product 1. The clamping member 10 may be a flexible member capable of elastic deformation, for example, the clamping member 10 may be made of a flexible material such as silicone or rubber. The clamping member 10 is disposed between the retaining member 10 and the end cap 6. It should be noted that, in other embodiments, the clamping member 10 for clamping the aerosol generating product 1 may be disposed on the end cap 6, and may be independent of the retaining member 4.

[0068] In one embodiment, reference may be made to Figure 2-Figure 4, the guiding slope 22 is arranged between the connecting portion 23 and the main body 21. Based on this, in one example, the inner diameter of the connecting portion 23 is uniform, or the aperture of the insertion hole 231 is uniform, and the aperture of the insertion hole 231 is substantially constant from the proximal end of the insertion hole 231 to the distal end of the insertion hole 231, or the area enclosed by the insertion hole 231 is substantially constant; in this example, the aperture of the insertion hole 231 may be equal to the diameter of the proximal end of the guiding slope 22, or the area enclosed by the insertion hole 231 may be equal to the area enclosed by the proximal end of the guiding slope 22, so the aperture of the insertion hole 231 is larger than the inner diameter of the main body 22, or the area enclosed by the insertion hole 231 is larger than the area enclosed by the main body 21. Alternatively, in one example, the insertion hole 231 gradually converges toward the central axis of the heating tube 2 along the insertion direction, so that the diameter of the insertion hole 231 gradually decreases from the proximal end of the insertion hole 231 to the distal end of the insertion hole 231, or the area enclosed by the insertion hole 231 gradually decreases, so that the insertion hole 231 is roughly in the shape of an inverted truncated cone or a prism, and at the same time, the inclination of the insertion hole 231 is greater than the inclination of the guide slope 22, that is, the diameter of the proximal end of the insertion hole 231 is greater than the diameter of the proximal end of the guide slope 22. The inner diameter, or the area enclosed by the proximal end of the insertion hole 231 is larger than the area enclosed by the proximal end of the guide slope 22; therefore, the aperture of the distal end of the insertion hole 231 is larger than the inner diameter of the main body 21, or the area enclosed by the distal end of the insertion hole 231 is larger than the area enclosed by the main body 21; wherein, the distal end of the insertion hole 231 and the guide slope 22 can be streamlinedly connected so that there is no clear boundary, and of course, there can also be a clear sharp edge between the distal end of the insertion hole 231 and the inner wall surface of the guide slope 22.

[0069] Alternatively, the guide slope 22 defines at least a portion of the boundary of the insertion hole 231 , so at least a portion of the boundary of the insertion hole 231 is inclined, and the inclination may extend from the proximal end of the connecting portion 23 to the main body portion 21 .

[0070] Based on the fact that the guiding slope 22 is disposed between the insertion hole 231 and the main body 21, or based on the fact that the guiding slope 22 defines at least a portion of the boundary of the insertion hole 231, further, reference can be made to Figure 2 , at least part of the insertion hole 231 is located in the outer tube 41, and the insertion hole 231 is connected to the holding cavity 421 in the inner tube 42 in the outer tube 41. Preferably, the inner diameter of the distal end of the holding cavity 421 is greater than or equal to the inner diameter of the proximal end of the insertion opening 23, or preferably, the area enclosed by the distal end of the holding cavity 421 is greater than or equal to the area enclosed by the proximal end of the insertion opening 23, so as to facilitate the insertion of the aerosol generating product 1 from the holding cavity 421 into the heating tube 2 and prevent the distal end of the aerosol generating product 1 from being stopped by the proximal end of the connecting portion 23.

[0071] In some embodiments, at least a portion of the heating tube 2 is configured to be able to induce heat in a changing magnetic field. Specifically, at least a portion of the heating tube 2 is able to generate eddy currents and hysteresis in a changing magnetic field, and the heating tube 2 can release heat under the action of the eddy currents and hysteresis. Based on this, the heating tube 2 may include metal or carbon. In one embodiment, the heating tube 2 may include a ferromagnetic material, such as ferrite, ferromagnetic steel or stainless steel. In one embodiment, the heating tube includes a nickel-iron alloy. In one embodiment, the heating tube includes 400 series stainless steel, and the 400 series stainless steel includes 410 grade or 420 grade or 430 grade stainless steel. When the heating tube 2 is made of metal, the heating tube 2 may have a substantially uniform wall thickness.

[0072] To adapt to the heating tube 2 capable of generating heat in a changing magnetic field, the aerosol generating device further includes an induction coil 1A for generating a changing magnetic field, and the induction coil 1A may be one or more. The induction coil 1A is capable of generating a changing magnetic field between 1 MHz and 30 MHz, for example, between 2 MHz and 10 MHz, for example, between 5 MHz and 7 MHz. In one embodiment, the induction coil 1A is capable of generating a changing magnetic field having a field strength (H field) between 1 kA / m and 5 kA / m, for example, between 2 kA / m and 3 kA / m, for example, about 2.5 kA / m. At least a portion of the induction coil 1A is disposed between the housing 5 and the main body 21. The induction coil 1A may be disposed around at least a portion of the heating tube.

[0073] As an example, the induction coil 1A is at least partially arranged around the main body 21, so that the main body 21 can generate heat in a changing magnetic field. When the aerosol generating product 1 is coupled to the aerosol generating device, at least a portion of the aerosol generating substrate 11 is located in the main body 21, and preferably at least most of the aerosol generating substrate 11 is located in the main body 21, so that the aerosol generating substrate 11 can be fully heated.

[0074] In such Figure 1In the illustrated embodiment, the proximal end of the aerosol generating substrate 11 is surrounded by the guiding slope 22 or is located in the insertion hole 231. Since the minimum diameter of the guiding slope 22 and the insertion hole 231 is greater than or equal to the inner diameter of the main body 21, or the minimum enclosed area of ​​the guiding slope 22 and the insertion hole 231 is greater than or equal to the enclosed area of ​​the main body 21, there is a gap 2A between the guiding slope 22 or the insertion hole 231 and the aerosol generating product 1, and the gap 2A is filled with gas, and the thermal conductivity of the gas is lower than the thermal conductivity of the solid. The gas filled in the gap 2A can increase the thermal resistance between the section corresponding to the gap 2A on the heating tube 2 and the proximal end of the aerosol generating substrate 11, thereby preventing the temperature of the proximal end of the aerosol generating substrate 11 from being too high, helping to reduce the temperature of the aerosol at the proximal end of the aerosol generating substrate 11, and preventing the aerosol inhaled into the oral cavity of the user from burning the mouth.

[0075] As an example, the guiding slope 22 and / or the insertion hole 231 are located in the surrounding of the induction coil 1A, so the section of the heating tube 2 corresponding to the guiding slope 22 and / or the insertion hole 231 can generate heat in the changing magnetic field. Figure 2 The proximal end of the induction coil 1A can be connected to the retaining member 4 , and the wire at the proximal end of the induction coil 1A can be retained by the retaining member 4 .

[0076] In the changing magnetic field generated by the induction coil 1A, the closer to the longitudinal middle position of the induction coil 1A, the greater the magnetic field strength, and the magnetic field strengths at the proximal and distal ends of the induction coil 1A are both smaller than the magnetic field strength at the longitudinal middle position of the induction coil 1A.

[0077] In such Figure 1 In the illustrated embodiment, the proximal end of the connection portion 23 is disposed adjacent to the proximal end of the induction coil 1A, so that the main body portion 21 is in a magnetic field environment with a greater magnetic field intensity than the guide slope 22 and / or the connection portion 23, which can not only promote uniform heating of the main body portion 21, but also help reduce the temperature gradient of the main body portion 21 in the longitudinal direction, and help to heat the aerosol generating matrix 11 more evenly.

[0078] In such Figure 1 In the illustrated embodiment, a portion of the cooling section 12 is located in the insertion port 23 and / or is surrounded by the guide slope 22. Although there is a gap 2A between the inner wall surface of the insertion port 23 and / or the guided slope 22 and the aerosol generating product 1, the section corresponding to the connecting portion 23 and / or the guide slope 22 has a higher temperature because it can generate heat, so that the gas in the gap 2A also has a higher temperature, thereby preventing the aerosol from condensing at the far end of the cooling section 12 or at the proximal end of the adjacent aerosol generating matrix 11, and preventing the condensate formed by the aerosol from clogging the proximal end of the aerosol generating matrix 11, thereby increasing the inhalation resistance.

[0079] In such Figure 1 In the illustrated embodiment, the proximal end of the heating tube 2 is located within the surround of the induction coil 1A.

[0080] The longitudinal spacing L1 between the proximal end of the heating tube 2 and the main body 21 is greater than or equal to 1.5 mm. This ensures that the main body 21 is located in a magnetic field environment with a large magnetic field strength and has sufficient space to accommodate the cooling section 12. The longitudinal extension length L2 of the guide slope 22 can be greater than or equal to 0.5 mm. And / or, the insertion hole 231 has a longitudinal depth, and its longitudinal extension length L3 can be greater than or equal to 1 mm.

[0081] In one embodiment, reference may be made to Figure 1 and Figure 5 The aerosol generating device also includes a first thermal insulation layer 1B arranged around the heating tube 2 and a second thermal insulation layer 2B arranged outside the first thermal insulation layer 1B. The first thermal insulation layer 1B and the second thermal insulation layer 2B are used to insulate and keep the heating tube 2 warm, thereby reducing the heat dissipated outward along the heating tube 2 in the horizontal direction.

[0082] The first thermal insulation layer 1B may be a solid layer having a thermal conductivity of no more than 1 W / (M*K), preferably no more than 0.026 W / (M*K), such as an aerogel layer, and the thickness of the first thermal insulation layer 1B may be about 0.3 mm-1.5 mm. The first thermal insulation layer 1B may be arranged close to the outer surface of the heating tube 2. The second thermal insulation layer 2B may also be a solid layer having a thermal conductivity of no more than 1 W / (M*K), preferably no more than 0.026 W / (M*K), such as an aerogel layer, and the thickness of the second thermal insulation layer 2B may be about 0.3 mm-1 mm.

[0083] Of course, the first thermal insulation layer 1B may also be a gas thermal insulation layer or a negative pressure layer; and / or, the second thermal insulation layer 2B may also be a gas thermal insulation layer or a negative pressure layer.

[0084] In one embodiment, while having the above-mentioned first thermal insulation layer 1B and second thermal insulation layer 2B, the thickness of the first thermal insulation layer 1B is greater than or equal to the thickness of the second thermal insulation layer 2B, thereby increasing the thermal insulation effect and reducing the volume of the aerosol generating device.

[0085] In one embodiment, reference may be made to Figure 1 and 5 The induction coil 1A is arranged between the first insulation layer 1B and the second insulation layer 2B. The first insulation layer 1B can prevent the heat of the heating tube 2 from heating the induction coil 1A and causing the temperature of the induction coil 1A to be too high. The second insulation layer 2B can prevent the heat generated by the induction coil 1A in the process of generating a changing magnetic field from being transferred to the housing 5, thereby preventing the housing 5 from being too hot and causing a burn.

[0086] In one embodiment, reference may be made to Figure 1 and Figure 5 , the second heat insulation layer 2B is arranged close to at least a part of the inner wall surface of the outer shell 5. The solid second heat insulation layer 2B can be attached to at least a part of the inner wall surface of the outer shell 5 by means of adhesive 3B. The solid second heat insulation layer 2B can be in direct contact with at least a part of the inner wall surface of the outer shell 5. There can also be other heat insulation layers between the first heat insulation layer 1B and the second heat insulation layer 2B that affect the heat transfer outward in the lateral direction.

[0087] In such Figure 1 and Figure 2 In the illustrated embodiment, the distal end of the heating tube 2 is located outside the surround of the induction coil 1A, and the clamping portion 24 provided on the heating tube 2 is located outside the surround of the induction coil 1A.

[0088] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application, but are not limited to the embodiments described in the specification. Furthermore, it is possible for a person of ordinary skill in the art to make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to the present application.

Claims

1. An aerosol generating device, characterized in that: include: a holder having a holding cavity having an open end disposed therein, the holding cavity being adapted to receive a portion of the aerosol generating article; and a heating tube, for receiving another part of the aerosol generating article, the heating tube comprising a main body and a connecting part connected to the retaining member, the connecting part defining an insertion hole for the aerosol generating article to pass through, the inner wall of the heating tube having a guiding slope that gradually converges toward the central axis of the heating tube along the insertion direction of the aerosol generating article, the guiding slope defining at least a part of the boundary of the insertion hole or being arranged between the connecting part and the main body; Wherein, at least a part of the connecting portion of the heating tube is located in the retaining member, or an end portion of the retaining member is located in the insertion hole.

2. The aerosol generating device according to claim 1, characterized in that: The retaining member comprises an inner tube and an outer tube, wherein the inner tube defines at least a portion of the boundary of the retaining cavity, and the outer tube is at least partially disposed on the periphery of the inner tube; The aerosol generating device further comprises a first sealing ring, which is arranged between the outer tube and the connecting portion and provides a sealing connection between the outer tube and the connecting portion.

3. The aerosol generating device according to claim 2, characterized in that: The distal end of the outer tube has a support portion extending approximately transversely, the end of the connecting portion has an abutment portion extending approximately transversely, and the first sealing ring is arranged between the support portion and the abutment portion and is supported by the support portion or abutted by the abutment portion.

4. The aerosol generating device according to claim 3, characterized in that: The abutment portion supports the distal end of the inner tube; or The abutment portion is located inside the outer tube.

5. The aerosol generating device according to claim 2, characterized in that: The aerosol generating device further comprises a second sealing ring, which is arranged between the outer tube and the inner tube and provides a sealing connection between the outer tube and the inner tube.

6. The aerosol generating device according to claim 1, characterized in that: The aerosol generating device comprises a clamping member fixed on the retaining member, wherein at least a portion of the clamping member protrudes into the retaining cavity for clamping the aerosol generating article.

7. The aerosol generating device according to claim 1, characterized in that: The insertion hole gradually converges toward the central axis of the heating tube along the insertion direction, and the inclination of the wall surface of the insertion hole is greater than the inclination of the guiding inclined surface; or The insertion holes have uniform diameters.

8. The aerosol generating device according to claim 7, characterized in that: The proximal end of the connecting portion is located in the retaining member, and the diameter of the distal end of the retaining cavity arranged opposite to the open end thereof is greater than or equal to the aperture of the proximal end of the insertion hole.

9. The aerosol generating device according to any one of claims 1 to 8, characterized in that: The inner diameter of the main body is uniform.

10. The aerosol generating device according to any one of claims 1 to 8, characterized in that: At least a portion of the heating tube is configured to generate inductive heat in a changing magnetic field, and the aerosol generating device further comprises an induction coil for generating a changing magnetic field; wherein The main body is located in the encirclement of the induction coil; or The guiding slope is located in the surround of the induction coil; or The proximal end of the heating tube is located within the encirclement of the induction coil; or The insertion hole is located in the surround of the induction coil.

11. The aerosol generating device according to claim 10, characterized in that: The extending length of the guiding slope in the longitudinal direction is greater than or equal to 0.5 mm; or The connecting portion has a longitudinal extension length greater than or equal to 1 mm; or A longitudinal distance between the proximal end of the heating tube and the main body is greater than or equal to 1.5 mm.

12. The aerosol generating device according to claim 10, characterized in that: The aerosol generating device further comprises a first heat-insulating layer arranged around the heating tube and a second heat-insulating layer arranged around the first heat-insulating layer, and the induction coil is arranged between the first heat-insulating layer and the second heat-insulating layer.

13. The aerosol generating device according to claim 12, characterized in that: The aerosol generating device further comprises a shell, and the second heat insulating layer is arranged in close contact with at least a portion of the inner wall surface of the shell.

14. The aerosol generating device according to any one of claims 1 to 8, characterized in that: The heating tube comprises a clamping portion for clamping the aerosol-generating article, the clamping portion being disposed adjacent a distal end of the heating tube.

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