Aerosol-generating device

Abstract

The utility model discloses an aerosol generating device, comprising: a heating structure comprising a feed-in port and an outer conductor defining a resonant cavity, the resonant cavity having an open end for an aerosol generating substrate to be inserted into the resonant cavity, the feed-in port being used for emitting microwaves into the resonant cavity to heat the aerosol generating substrate; the clamping structure is arranged outside the resonant cavity, and the clamping structure is used for clamping the part, located outside the resonant cavity, of the contained aerosol generating substrate; the driving structure is used for driving the clamping structure to move in the axial direction of the contained aerosol generating substrate. During use, the clamping structure is located outside the resonant cavity and is used for clamping the part, located outside the resonant cavity, of the contained aerosol generating substrate, so that the influence on the resonant frequency in the resonant cavity when the driving structure drives the aerosol generating substrate to move can be reduced; therefore, the problem of inconsistent heating effects of different areas of the aerosol generating substrate in the prior art is solved.

Description

TECHNICAL FIELD

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

[0002] Currently, heating type aerosol generating devices (heat-not-burn cigarette appliances) mostly use resistance, infrared, or electromagnetic heating. The aerosol generating device using the above heating method includes at least one heating element. The device provides power to control the temperature of the heating element. The heat energy is conducted to the aerosol generating substrate by contact heat transfer, so that the aerosol generating substrate reaches a temperature for continuously generating aerosol. However, the aerosol generating device using the above heating method has the following problems: 1. The heat transfer coefficient of the aerosol generating substrate is low, and the ignition point is low, so that the temperature of the heating element cannot be too high, thereby causing a long preheating time required when the aerosol generating device is used; 2. The temperature field of the aerosol generating substrate is not uniform when heated, thereby causing poor consistency of the taste when smoked.

[0003] Therefore, the related technology proposes an aerosol generating device using microwave heating to heat the aerosol generating substrate, which has the advantages of fast heating speed and uniform heating. Specifically, the microwave is fed into a metal cavity (resonant cavity) containing the aerosol generating substrate by using a feed structure. The polar molecules in the aerosol generating substrate oscillate and generate heat under the action of microwave energy. When the aerosol generating substrate is heated by using the microwave heating method, in order to heat the aerosol generating substrate more uniformly, the aerosol generating substrate usually needs to be heated in segments along the axial direction of the aerosol generating substrate. However, the traditional aerosol generating device usually uses a push rod extending into the metal cavity to push the aerosol generating substrate to move along the axial direction of the aerosol generating substrate. The movement of the push rod in the metal cavity changes the size of the resonant frequency inside the metal cavity, thereby causing the problem of inconsistent heating effect of different regions of the aerosol generating substrate. CONTENT OF THE UTILITY MODEL

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes an aerosol generating device which can reduce the influence of the driving structure on the resonant frequency inside the resonant cavity when driving the aerosol generating substrate to move, thereby helping to improve the problem of inconsistent heating effect of different regions of the aerosol generating substrate.

[0005] The aerosol generating device according to the embodiments of the present application comprises:

[0006] A heating structure, the heating structure comprises a feed-in port and an outer conductor defining a resonant cavity, the resonant cavity has an open end for the aerosol generating substrate to be inserted into the resonant cavity, and the feed-in port is used to emit microwaves into the resonant cavity to heat the aerosol generating substrate;

[0007] a clamping structure disposed outside the resonant cavity, the clamping structure being configured to clamp a portion of the received aerosol generating substrate located outside the resonant cavity; and

[0008] a driving structure configured to drive the clamping structure to move along an axial direction of the received aerosol generating substrate.

[0009] The aerosol generating device according to the embodiments of the present application has at least the following beneficial effects: during use, the heating structure emits microwave energy of a preset power into the resonant cavity through the feed-in port, the microwave energy is coupled into the received aerosol generating substrate and heats the aerosol generating substrate, thereby generating aerosol for a user to smoke. The clamping structure clamps the received aerosol generating substrate, and the driving structure drives the clamping structure to move along the axial direction of the received aerosol generating substrate, thereby achieving segmented heating of the aerosol generating substrate. Since the clamping structure is located outside the resonant cavity and is configured to clamp a portion of the received aerosol generating substrate located outside the resonant cavity, the influence of the driving structure on the resonant frequency inside the resonant cavity when driving the aerosol generating substrate to move can be reduced, thereby facilitating improvement of the problem of inconsistent heating effect of different regions of the aerosol generating substrate in the related art.

[0010] According to some embodiments of the present application, the driving structure includes a driving motor and a transmission assembly, the transmission assembly being connected to an output shaft of the driving motor and acting on the clamping structure, the transmission assembly being configured to convert rotary motion into linear motion.

[0011] According to some embodiments of the present application, the transmission assembly includes a gear and a rack, the gear being connected to the output shaft of the driving motor, and the rack being connected to the clamping structure, the gear and the rack being engaged with each other.

[0012] According to some embodiments of the present application, the pitch of the teeth of the rack is 1mm to 2mm.

[0013] According to some embodiments of the present application, the driving structure includes one of a linear motor, an electric push rod, and a pneumatic cylinder.

[0014] According to some embodiments of the present application, the clamping structure includes a clamping member, the clamping member being provided with a through hole capable of penetrating the aerosol generating substrate, the through hole being configured to be in interference fit with the penetrated aerosol generating substrate to clamp the aerosol generating substrate.

[0015] According to some embodiments of the present application, the clamping structure comprises a clamping piece, wherein a through hole capable of containing the aerosol generating substrate is arranged on the clamping piece, and a plurality of protruding clamping portions are arranged on the hole wall of the through hole in a spaced manner, and the clamping portions are used to abut against the aerosol generating substrate contained in the through hole to clamp the aerosol generating substrate.

[0016] According to some embodiments of the present application, a guide inclined surface is arranged on the side of the clamping portion away from the resonant cavity.

[0017] According to some embodiments of the present application, the clamping portion is made of an elastic material.

[0018] According to some embodiments of the present application, an elastic structure is arranged between the clamping portion and the hole wall of the through hole.

[0019] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0021] Figure 1 is a structural schematic diagram of an aerosol generating device according to an embodiment of the present application;

[0022] Figure 2 is a structural schematic diagram of the rack and the clamping piece in the structure shown in Figure 1

[0023] Figure 3 is a structural schematic diagram of an aerosol generating device according to another embodiment of the present application;

[0024] Figure 4 is a structural schematic diagram of the clamping piece in the structure shown in Figure 3

[0025] Figure 5 is an electric field distribution diagram in a one-time heating process of an aerosol generating device without a driving structure;

[0026] Figure 6 is a return loss diagram in a one-time heating process of an aerosol generating device without a driving structure;

[0027] Figure 7 is an electric field distribution diagram in a one-time heating process of an aerosol generating device with a partial driving structure in the resonant cavity;

[0028] Figure 8 is a return loss diagram in a one-time heating process of an aerosol generating device with a partial driving structure in the resonant cavity;​​

[0029] Figure 9 is Figure 1 The electric field distribution diagram of the aerosol generating device in the first heating process of the embodiment shown in FIG. 8;

[0030] Figure 10 is Figure 1 The return loss diagram of the aerosol generating device in the first heating process of the embodiment shown in FIG. 8.

[0031] Reference signs:

[0032] Aerosol generating substrate a;

[0033] Feed port 110, outer conductor 120;

[0034] Driving motor 210, gear 220, rack 230, linear motor 240;

[0035] Clamping piece 310, perforation 311, clamping part 312, guide slope 3121. DETAILED DESCRIPTION

[0036] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0037] In the description of the present application, it should be understood that, if the orientation description is involved, for example, the orientation or position relationship indicated by the upper, lower, front, rear, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application, which does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0038] In the description of the present application, if the words such as several, more than, less than, exceed, above, below, within, etc. appear, wherein the meaning of several is one or more, the meaning of more than is two or more, more than, less than, exceed, etc. are understood as not including the number, above, below, within, etc. are understood as including the number.

[0039] In the description of the present application, if the words such as first, second, etc. appear, they are only used to distinguish technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0040] In the description of the present application, the words such as arrangement, installation, connection and the like should be understood broadly unless otherwise explicitly limited, and the skilled in the art can determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0041] With reference to Figures 1 to 4 The aerosol generating device according to the embodiments of the present application includes a heating structure, a clamping structure and a driving structure.

[0042] Specifically, the heating structure includes a feed-in port 110 and an outer conductor 120 defining a resonant cavity, the resonant cavity having an open end for inserting an aerosol generating substrate a into the resonant cavity, the feed-in port 110 being configured to emit microwaves into the resonant cavity to heat the aerosol generating substrate a, the clamping structure being arranged outside the resonant cavity and configured to clamp a portion of the received aerosol generating substrate a outside the resonant cavity, and the driving structure being configured to drive the clamping structure to move along the axis of the received aerosol generating substrate a.

[0043] In use, the heating structure emits microwave energy of a preset power into the resonant cavity through the feed-in port 110, the microwave energy is coupled into the received aerosol generating substrate a and heats the aerosol generating substrate a, thereby generating aerosol for the user to smoke. The clamping structure clamps the received aerosol generating substrate a, and the driving structure drives the clamping structure to move along the axis of the received aerosol generating substrate a, thereby achieving segmented heating of the aerosol generating substrate a. Since the clamping structure is located outside the resonant cavity and is configured to clamp a portion of the received aerosol generating substrate a outside the resonant cavity, the influence of the driving structure on the resonant frequency inside the resonant cavity when driving the aerosol generating substrate a to move can be reduced, thereby facilitating the improvement of the inconsistent heating effect of different regions of the aerosol generating substrate a in the related art.

[0044] Specifically, in the process of heating and atomizing the aerosol generating substrate a, the feed-in port 110 provides an electromagnetic signal of a preset frequency and a preset power to the resonant cavity, wherein the preset frequency of the electromagnetic signal is generally an ISM frequency band greater than or equal to 433 MHz, and the preset power of the electromagnetic signal is generally 1 W to 50 W, such as 1 W, 50 W, 25 W and other values within the above numerical range.

[0045] It should be noted that when the driving structure drives the aerosol generating substrate a to move, the number of times that the driving structure drives the aerosol generating substrate a to move can be preset based on the main coupling electric field region in the one-time heating process and the requirement of the specific number of puffs (i.e. the number of puffs) of the aerosol generating substrate a. Specifically, the driving structure drives the aerosol generating substrate a to move 1mm-2mm, such as 1mm, 2mm, 1.5mm and other values within the above numerical range, and the number of times that each aerosol generating substrate a moves is 6-16 times, such as 6 times, 16 times, 10 times and other values within the above numerical range.

[0046] Referring to Figure 1 In some embodiments, the driving structure includes a driving motor 210 and a transmission assembly connected to the output shaft of the driving motor 210 and acting on the clamping structure, and the transmission assembly is used to convert the rotary motion into linear motion, and the power output by the driving motor 210 is transmitted to the clamping structure through the transmission assembly to drive the clamping structure to move, which is simple in structure and easy to implement.

[0047] Referring to Figure 1 In some embodiments, the transmission assembly includes a gear 220 connected to the output shaft of the driving motor 210 and a rack 230 connected to the clamping structure, and the gear 220 and the rack 230 are engaged with each other, and the rotary motion of the output shaft of the driving motor 210 is converted into linear motion through the gear 220 and the rack 230, and the transmission is stable and the distance that the driving structure drives the aerosol generating substrate a to move each time can be controlled by the rotational speed of the output shaft of the driving motor 210 and the pitch of the rack 230.

[0048] Specifically, in some embodiments, the pitch of the rack 230 is 1mm-2mm, such as 1mm, 2mm, 1.5mm and other values within the above numerical range.

[0049] It should be noted that in some other embodiments, the transmission assembly described above can also use a lead screw assembly, which is not limited here.

[0050] Referring to Figure 3 In some other embodiments, the driving structure includes a linear motor 240, which directly drives the clamping structure to move, and at this time, the transmission assembly described above is not required, which is beneficial to simplify the overall structure and reduce the volume of the overall structure.

[0051] It should be noted that in some other embodiments, the driving structure can also use an electric push rod or an air cylinder, which is not limited here.

[0052] In some embodiments, the clamping structure includes a clamping piece 310, and the clamping piece 310 is provided with a through hole 311 capable of penetrating the aerosol generating substrate a, and the through hole 311 is used to clamp the aerosol generating substrate a in an interference fit with the penetrated aerosol generating substrate a. The clamping of the aerosol generating substrate a by interference fit is simple in structure and easy to implement.

[0053] Specifically, the interference amount between the through hole 311 and the aerosol generating substrate a is generally 0.48mm-0.52mm, for example, 0.48mm, 0.52mm, 0.5mm and other values within the above numerical range, which is conducive to preventing the aerosol generating substrate a from bending, deforming or even being damaged during the penetration of the through hole 311.

[0054] Referring to Figures 1 to 4 In some embodiments, the clamping structure includes a clamping piece 310, and the clamping piece 310 is provided with a through hole 311 capable of penetrating the aerosol generating substrate a, and the through hole 311 is provided with a plurality of protruding clamping portions 312 on the hole wall, and the clamping portions 312 are used to abut the penetrated aerosol generating substrate a in the through hole 311 to clamp the aerosol generating substrate a. The clamping of the aerosol generating substrate a by the clamping portions 312 is conducive to reducing the difficulty of penetrating the aerosol generating substrate a, thereby preventing the aerosol generating substrate a from bending, deforming or even being damaged during the penetration of the through hole 311.

[0055] Specifically, the friction coefficient between the clamping portion 312 and the aerosol generating substrate a is greater than or equal to 0.2, so as to ensure that the clamping portion 312 can stably clamp the aerosol generating substrate a, and when the driving structure drives the clamping piece 310 clamping the aerosol generating substrate a to move, it is conducive to preventing the relative movement between the clamping piece 310 and the aerosol generating substrate a.

[0056] Referring to Figure 2 and Figure 4 In some embodiments, the clamping portion 312 is provided with a guide inclined surface 3121 on the side away from the resonant cavity, which is conducive to further reducing the difficulty of penetrating the aerosol generating substrate a.

[0057] In some embodiments, the clamping portion 312 is made of an elastic material, so that the clamping portion 312 can be elastically deformed when subjected to force, so that the clamping portion 312 can adapt to aerosol generating substrates a of different sizes, thereby improving the versatility of the aerosol generating device of the embodiments of the present application.

[0058] Specifically, the clamping portion 312 can be made of an elastic material such as rubber or silicone.

[0059] In some embodiments, a resilient structure is arranged between the clamping portion 312 and the hole wall of the through hole 311, and the resilient structure can be elastically deformed when subjected to force, so that the clamping portion 312 can adapt to aerosol generating substrates a of different sizes, thereby facilitating the versatility of the aerosol generating device of the embodiments of the present application.

[0060] Specifically, the resilient structure can cooperate with the guide slope 3121 described above to better adapt to aerosol generating substrates a of different sizes.

[0061] Specifically, the resilient structure can be a spring, a spring sheet, a rubber block, a silica gel block, or any structure that has elasticity and can be elastically deformed when subjected to force.

[0062] In some embodiments, the clamping structure and the driving structure are detachably connected, facilitating replacement or recycling of the driving structure.

[0063] Specifically, the clamping structure and the driving structure can be detachably connected by screws or a buckle structure, without being limited thereto.

[0064] Referring to Figure 5 and Figure 6 , the illustrated contents are the electric field distribution and the return loss (used as a reference standard) in a one-time heating process when the aerosol generating device does not contain the driving structure. As can be seen from the figure, the minimum frequency of the return loss is 2.4562 GHz, which is within the Bluetooth frequency band range, and the electric field is concentrated in the current heating area of the aerosol generating substrate a.

[0065] Referring to Figure 7 and Figure 8 , the illustrated contents are the electric field distribution and the return loss in a one-time heating process when the aerosol generating device contains part of the driving structure in the resonant cavity. As can be seen from the figure, the minimum frequency of the return loss is 2.4356 GHz, which has an absolute error of 20.6 MHz compared to the above-mentioned reference standard, and the error is large. In addition, the electric field distribution is offset to the driving structure in the resonant cavity. When the aerosol generating substrate a moves under the driving of the driving structure, it can not only cause the area of the aerosol generating substrate a that has been heated to be heated again, thereby generating harmful substances, but also can cause the area of the aerosol generating substrate a that has not been heated to be heated in advance, thereby causing the heating effect of different areas of the aerosol generating substrate a to be inconsistent, i.e., the consistency before and after is poor, and can also cause the electric-thermal conversion of the main coupling area of the aerosol generating substrate a to be insufficient, so that the aerosol generating substrate a cannot reach the preset heating temperature.

[0066] Referring to Figure 9 and Figure 10, the electric field distribution and the return loss in the one heating process of the aerosol generating device of the embodiment of the present application are shown, and it can be seen from the figure that the minimum frequency of the return loss is 2.4640GHz at this time, and compared with the above-mentioned reference standard, the absolute error is 7.8MHz, and the error is smaller. In addition, the electric field distribution is also concentrated in the current heating area of the aerosol generating substrate a.

[0067] Therefore, the aerosol generating device of the embodiment of the present application can reduce the influence of the driving structure driving the aerosol generating substrate a to move on the internal resonance frequency of the resonant cavity, thereby being conducive to improving the problem of inconsistent heating effect of different areas of the aerosol generating substrate a in the related art.

[0068] In the description of the present specification, if the description involves the description of the terms such as "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" and "some examples", it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0069] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An aerosol generating device, characterized in that, include: A heating structure includes a feed port and an outer conductor defining a resonant cavity, the resonant cavity having an opening for inserting an aerosol generating matrix into the resonant cavity, the feed port being used to emit microwaves into the resonant cavity to heat the aerosol generating matrix; A clamping structure is disposed outside the resonant cavity, and the clamping structure is used to clamp the portion of the contained aerosol generating matrix located outside the resonant cavity; as well as, A driving structure for driving the clamping structure to move axially along the contained aerosol generating matrix.

2. The aerosol generating apparatus as described in claim 1, characterized in that, The drive structure includes a drive motor and a transmission assembly. The transmission assembly is connected to the output shaft of the drive motor and acts on the clamping structure. The transmission assembly is used to convert rotational motion into linear motion.

3. The aerosol generating apparatus as described in claim 2, characterized in that, The transmission assembly includes a gear and a rack. The gear is connected to the output shaft of the drive motor, and the rack is connected to the clamping structure. The gear and the rack mesh with each other.

4. The aerosol generating apparatus as described in claim 3, characterized in that, The tooth pitch of the rack is 1mm to 2mm.

5. The aerosol generating apparatus as described in claim 1, characterized in that, The drive structure includes one of a linear motor, an electric actuator, and a cylinder.

6. The aerosol generating apparatus according to any one of claims 1 to 5, characterized in that, The clamping structure includes a clamping member, which has a through hole for passing through an aerosol generating matrix. The through hole is used to press against the aerosol generating matrix to clamp the aerosol generating matrix.

7. The aerosol generating apparatus according to any one of claims 1 to 5, characterized in that, The clamping structure includes a clamping member, which has a through hole for passing through an aerosol generating matrix. The wall of the through hole is provided with a plurality of protruding clamping portions at intervals. The clamping portions are used to abut against the aerosol generating matrix passing through the through hole to clamp the aerosol generating matrix.

8. The aerosol generating apparatus as described in claim 7, characterized in that, The clamping part has a guide slope on the side facing away from the resonant cavity.

9. The aerosol generating apparatus as described in claim 7, characterized in that, The clamping part is made of elastic material.

10. The aerosol generating apparatus as described in claim 7, characterized in that, An elastic structure is provided between the clamping part and the wall of the perforation.

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