Aerosol-generating device

Abstract

The present application provides an aerosol-generating device. The aerosol generating device comprises a main liquid storage bin used for storing an atomizing medium; the auxiliary liquid storage bin is communicated with the main liquid storage bin and external gas; the atomizing core is communicated with the main liquid storage bin and used for atomizing the atomizing medium flowing out of the main liquid storage bin to form aerosol. According to the aerosol generating device, when the air pressure in the main liquid storage bin is larger than the external air pressure, the atomizing medium in the main liquid storage bin can flow towards the auxiliary liquid storage bin, so that the atomizing medium exposed out of the main liquid storage bin is stored through the auxiliary liquid storage bin, and the liquid leakage occurrence probability is reduced; meanwhile, when the air pressure in the main liquid storage bin is smaller than the external air pressure, the atomizing medium stored in the auxiliary liquid storage bin can flow back to the main liquid storage bin to be atomized, and therefore the utilization rate of the atomizing medium is increased.

Description

Technical Field

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

[0002] The aerosol generating device includes a liquid storage tank and an atomizing core. The liquid storage tank is used to store the atomizing medium. The atomizing core is heated to a temperature at which the atomizing medium can generate an aerosol, so that the atomizing medium can generate the aerosol required by the user. However, the atomizing medium is usually a liquid medium, and the existing aerosol generating device may leak during transportation, storage, etc. Summary of the invention

[0003] The aerosol generating device provided in the present application is intended to solve the problem of liquid leakage of the aerosol generating device during transportation, storage, etc.

[0004] In order to solve the above technical problems, a technical solution adopted by the present application is to provide an aerosol generating device. The aerosol generating device has a nozzle, and includes: a main liquid storage tank, a secondary liquid storage tank and an atomizing core, wherein the main liquid storage tank is used to store atomizing medium; the secondary liquid storage tank is connected to the main liquid storage tank and the external air; the atomizing core is connected to the main liquid storage tank and is used to atomize the atomizing medium flowing out of the main liquid storage tank to form an aerosol.

[0005] In one embodiment, along the length direction of the aerosol generating device, at least a portion of the secondary liquid storage tank overlaps with the main liquid storage tank.

[0006] In one embodiment, the aerosol generating device has a mouthpiece;

[0007] The auxiliary liquid storage tank has a top end and a bottom end opposite to each other along the length direction of the aerosol generating device. The top end of the auxiliary liquid storage tank is arranged close to the suction nozzle, and the bottom end of the auxiliary liquid storage tank is directly connected to the main liquid storage tank.

[0008] In one embodiment, the auxiliary liquid storage tank has an opposite auxiliary top wall and auxiliary bottom wall along the length direction of the aerosol generating device; and the auxiliary bottom wall of the auxiliary liquid storage tank is directly connected to the main liquid storage tank.

[0009] In one embodiment, it further includes:

[0010] The first ventilation valve is arranged at the connection point between the auxiliary liquid storage tank and the main liquid storage tank; and in response to the pressure difference between the main liquid storage tank and the auxiliary liquid storage tank being not greater than the liquid locking threshold, the first ventilation valve is permeable to air but not permeable to liquid; in response to the pressure difference between the main liquid storage tank and the auxiliary liquid storage tank being greater than the liquid locking threshold, the first ventilation valve is permeable to air and permeable to liquid.

[0011] In one embodiment, the main liquid storage tank has a relative main top wall and a main bottom wall along the length direction of the aerosol generating device; the first ventilation valve is spaced apart from the main bottom wall of the main liquid storage tank; and along the length direction of the aerosol generating device, a first distance between the first ventilation valve and the main bottom wall is greater than a second distance between the first ventilation valve and the main top wall.

[0012] In one embodiment, it further includes:

[0013] The second ventilation valve is arranged at the connection point between the auxiliary liquid storage tank and the external air. The auxiliary liquid storage tank is connected with the external air through the second ventilation valve; and the second ventilation valve is permeable to air but not to liquid.

[0014] In one embodiment, the second ventilation valve is disposed on a secondary top wall of the secondary liquid storage tank or a side wall of the secondary liquid storage tank close to the secondary top wall.

[0015] In one embodiment, it further includes:

[0016] The liquid absorbing member is arranged on a side of the second ventilation valve away from the auxiliary liquid storage tank, and is used for storing the atomized medium exposed from the second ventilation valve.

[0017] In one embodiment, it further includes:

[0018] The power supply compartment is used to accommodate the power supply; wherein the auxiliary liquid storage compartment is connected to the power supply compartment and is connected to the external air through the power supply compartment; the liquid absorption component is arranged in the power supply compartment.

[0019] In one embodiment, the first ventilation valve and / or the second ventilation valve comprises a porous matrix, and the porous matrix is ​​provided with through holes along the thickness direction thereof.

[0020] In one embodiment, the ratio of the volume of the auxiliary liquid storage tank to the volume of the main liquid storage tank is 10% to 30%.

[0021] In one embodiment, along a length direction perpendicular to the aerosol generating device, the auxiliary liquid storage tank and the main liquid storage tank are arranged side by side, and the main liquid storage tank and the auxiliary liquid storage tank share a side wall, and the auxiliary bottom wall of the auxiliary liquid storage tank also serves as the side wall of the main liquid storage tank.

[0022] The beneficial effects of the embodiments of the present application are different from those of the prior art: the aerosol generating device provided by the embodiments of the present application comprises a main liquid storage tank, a secondary liquid storage tank and an atomizing core; wherein the main liquid storage tank is used to store atomizing medium; the secondary liquid storage tank is connected to the main liquid storage tank and the external air; the atomizing core is connected to the main liquid storage tank, and is used to atomize the atomizing medium flowing out of the main liquid storage tank to form an aerosol; in this way, when the air pressure in the main liquid storage tank is greater than the external air pressure, the atomizing medium in the main liquid storage tank can flow to the secondary liquid storage tank, so as to store the atomizing medium exposed from the main liquid storage tank through the secondary liquid storage tank, thereby reducing the probability of leakage; at the same time, when the air pressure in the main liquid storage tank is less than the external air pressure, the atomizing medium stored in the secondary liquid storage tank can also flow back to the main liquid storage tank for atomization, thereby improving the utilization rate of the atomizing medium; at the same time, the main liquid storage tank is indirectly connected to the external air through the secondary liquid storage tank, and the pressure balance of the main liquid storage tank can also be achieved, which is conducive to the flow of atomizing medium to the atomizing core to supply liquid, and avoid dry burning caused by insufficient liquid supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0024] Figure 1 It is a schematic diagram of the overall structure of an aerosol generating device provided in one embodiment of the present application;

[0025] Figure 2 yes Figure 1 A cross-sectional view of the aerosol generating device taken along the line AA;

[0026] Figure 3 is a simplified structural diagram of an aerosol generating device provided in one embodiment of the present application;

[0027] Figure 4 A vertical cross-sectional view of a first ventilation valve or a second ventilation valve provided in one embodiment of the present application.

[0028] BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 1-main liquid storage tank; 10-shell; 11-main top wall; 12-main bottom wall; 2-auxiliary liquid storage tank; 21-auxiliary top wall; 22-auxiliary bottom wall; 3-atomizing core; 4-air flow channel; 5-nozzle; 6a-first air exchange valve; 6b-second air exchange valve; 61-porous matrix; 62-through hole; 7-liquid absorption part; 8-power supply tank; 9-power supply. DETAILED DESCRIPTION

[0030] 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 one end of the embodiments of the present application, rather than the full end. 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.

[0031] The terms "first", "second" and "third" in this application are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second" and "third" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. All directional indications in the embodiments of this application (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the end pieces under a certain specific posture (as shown in the accompanying drawings). 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, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, 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 devices.

[0032] 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.

[0033] In the related art, during the transportation of the aerosol generating device, such as air transportation, the atomized medium in the liquid storage tank will break through the sealing structure and leak out due to the pressure difference. At the same time, due to the temperature difference, there will be a large pressure change inside the liquid storage tank, and excessive pressure will also cause leakage.

[0034] To this end, an embodiment of the present application provides an aerosol generating device, which adds a secondary liquid storage tank connected to the main liquid storage tank, so that when the pressure in the main liquid storage tank increases, the atomized medium in the main liquid storage tank can flow to the secondary liquid storage tank for storage, thereby reducing the risk of the atomized medium leaking into other structures of the aerosol generating device or leaking outside the aerosol generating device.

[0035] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0036] See also Figures 1 to 3 , Figure 1 It is a schematic diagram of the overall structure of an aerosol generating device provided in one embodiment of the present application; Figure 2 yes Figure 1 A cross-sectional view of the aerosol generating device taken along the line AA;

[0037] Figure 3 1 is a simplified structural diagram of an aerosol generating device provided in an embodiment of the present application. In this embodiment, an aerosol generating device is provided, and the aerosol generating device comprises a main liquid storage tank 1, a secondary liquid storage tank 2, an atomizing core 3, an air flow channel 4 and a nozzle 5.

[0038] The main liquid storage tank 1 is used to store the atomized medium. The atomized medium includes a liquid matrix, such as oils with added aroma components, liquid medicine, etc. Specifically, the main liquid storage tank 1 has a main top wall 11 and a main bottom wall 12 opposite to each other along the length direction Y of the aerosol generating device.

[0039] The atomizing core 3 is connected to the main liquid storage tank 1, and is used to atomize the atomizing medium flowing out of the main liquid storage tank 1 to form an aerosol. Specifically, the atomizing core 3 can be connected to the main bottom wall 12 of the main liquid storage tank 1 to ensure that the atomizing medium in the main liquid storage tank 1 can flow out to the atomizing core 3 for atomization, reduce the residual atomizing medium, and improve the utilization rate of the atomizing medium. The suction nozzle 5 is connected to the air flow channel 4, and the aerosol formed by the atomization of the atomizing core 3 flows out to the suction nozzle 5 through the air flow channel 4 for the user to inhale.

[0040] The auxiliary liquid storage tank 2 is connected to the main liquid storage tank 1 and the outside air respectively; and along the length direction Y of the aerosol generating device, at least part of the auxiliary liquid storage tank 2 overlaps with the main liquid storage tank 1. Among them, since the auxiliary liquid storage tank 2 is connected to the outside air and the main liquid storage tank 1 respectively, the main liquid storage tank 1 and the outside air can exchange airflow through the auxiliary liquid storage tank 2 to maintain the air pressure balance inside and outside the main liquid storage tank 1. In this way, when the air pressure in the main liquid storage tank 1 is greater than the outside air pressure, the atomized medium in the main liquid storage tank 1 can flow to the auxiliary liquid storage tank 2, so as to store the atomized medium overflowing from the outside of the main liquid storage tank 1 through the auxiliary liquid storage tank 2, thereby reducing or avoiding the risk of the atomized medium in the main liquid storage tank 1 leaking to other positions of the aerosol generating device or leaking outside the aerosol generating device; at the same time, when the air pressure in the main liquid storage tank 1 is less than the outside air pressure, the atomized medium stored in the auxiliary liquid storage tank 2 can also flow back to the main liquid storage tank 1 for atomization, thereby improving the utilization rate of the atomized medium. At the same time, the main liquid storage tank 1 is indirectly connected to the external gas through the auxiliary liquid storage tank 2, which can also achieve pressure balance in the main liquid storage tank 1, which is conducive to the flow of atomization medium to the atomization core 3 and avoids dry burning caused by insufficient liquid supply.

[0041] The auxiliary liquid storage tank 2 has a top and a bottom that are opposite to each other along the length direction Y of the aerosol generating device. The top of the auxiliary liquid storage tank 2 is arranged close to the suction nozzle 5, and the bottom of the auxiliary liquid storage tank 2 is directly connected to the main liquid storage tank 1. In this way, the atomized medium in the auxiliary liquid storage tank 2 can flow back to the main liquid storage tank 1 under the action of gravity, so that the atomized medium can be reused, thereby improving the utilization rate of the atomized medium and reducing the risk of leakage.

[0042] Specifically, the auxiliary liquid storage tank 2 has a relative auxiliary top wall 21 and auxiliary bottom wall 22 along the length direction Y of the aerosol generating device, and side walls respectively connected to the auxiliary top wall 21 and the auxiliary bottom wall 22, and the auxiliary top wall 21, the auxiliary bottom wall 22 and the side walls are arranged to form a cavity for storing the atomized medium flowing out of the main liquid storage tank 1. It should be noted that the top end of the auxiliary liquid storage tank 2 designed in the present application can be the auxiliary top wall 21, or it can include the auxiliary top wall 21 and the part of the side wall close to the auxiliary top wall 21; the bottom end of the auxiliary liquid storage tank 2 can be the auxiliary bottom wall 22, or it can include the auxiliary bottom wall 22 and the part of the side wall close to the auxiliary bottom wall 22.

[0043] In a specific embodiment, the secondary bottom wall 22 of the secondary liquid storage tank 2 is directly connected to the main liquid storage tank 1; compared with the solution in which the part of the side wall of the secondary liquid storage tank 2 close to the secondary bottom wall 22 is directly connected to the main liquid storage tank 1, it is more convenient for the atomized medium in the secondary liquid storage tank 2 to flow back to the main liquid storage tank 1, thereby reducing the residual atomized medium in the secondary liquid storage tank 2, improving the utilization rate of the atomized medium, and reducing the risk of leakage.

[0044] In one embodiment, the aerosol generating device further comprises a first ventilation valve 6a, which is arranged at the connection point between the auxiliary liquid storage tank 2 and the main liquid storage tank 1, and the auxiliary liquid storage tank 2 is connected to the main liquid storage tank 1 through the first ventilation valve 6a. In response to the pressure difference between the main liquid storage tank 1 and the auxiliary liquid storage tank 2 being not greater than the liquid locking threshold, the first ventilation valve 6a is permeable to air but not permeable to liquid, that is, the first ventilation valve 6a can pass gas but not liquid. In response to the pressure difference between the main liquid storage tank 1 and the auxiliary liquid storage tank 2 being greater than the liquid locking threshold, the first ventilation valve 6a is permeable to air and liquid, that is, the first ventilation valve 6a can pass both gas and liquid. Among them, the liquid locking threshold is the minimum pressure difference value that allows liquid to flow through.

[0045] In a specific embodiment, a first communication hole is opened on the auxiliary bottom wall 22 of the auxiliary liquid storage tank 2, and the first ventilation valve 6a is arranged in the first communication hole.

[0046] Combination Figure 2 and Figure 3 , the first ventilation valve 6a is spaced apart from the main bottom wall 12 of the main liquid storage tank 1. In this way, along the length direction Y of the aerosol generating device, when the liquid level of the atomized medium in the main liquid storage tank 1 is lower than the position of the first ventilation valve 6a, the first ventilation valve 6a can directly exchange air.

[0047] Among them, along the length direction Y of the aerosol generating device, the first distance between the first ventilation valve 6a and the main bottom wall 12 is greater than the second distance between the first ventilation valve 6a and the main top wall 11; in this way, when the size of the auxiliary liquid storage tank 2 along the length direction Y of the aerosol generating device is constant, the overlapping length of the auxiliary liquid storage tank 2 and the main liquid storage tank 1 along the length direction Y of the aerosol generating device can be increased, which is conducive to realizing the miniaturized design of the aerosol generating device.

[0048] In one embodiment, please refer to Figure 2 and Figure 3 The aerosol generating device also includes a second ventilation valve 6b, which is arranged at the connection point between the auxiliary liquid storage tank 2 and the external air. One side of the second ventilation valve 6b is connected to the auxiliary liquid storage tank 2, and the other side is connected to the external air. The auxiliary liquid storage tank 2 is specifically connected to the external air through the second ventilation valve 6b; and the second ventilation valve 6b is permeable to air but not to liquid.

[0049] In the specific use process, when there is a temperature difference or pressure difference inside and outside the main liquid storage tank 1, the volume of the atomized medium in the main liquid storage tank 1 expands or the pressure increases. When the pressure difference inside and outside the main liquid storage tank 1 is greater than the liquid lock threshold of the first ventilation valve 6a, part of the atomized medium in the main liquid storage tank 1 flows to the auxiliary liquid storage tank 2; when the pressure in the main liquid storage tank 1 and the auxiliary liquid storage tank 2 is balanced, the atomized medium no longer flows. At this time, the atomized medium that cannot be accommodated in the main liquid storage tank 1 is accommodated by the auxiliary liquid storage tank 2, and the auxiliary liquid storage tank 2 is connected to the external air through the second ventilation valve 6b to achieve air pressure balance, and finally achieve pressure balance in the main liquid storage tank 1 and the auxiliary liquid storage tank 2.

[0050] During the suction process, as the atomizing medium in the main liquid storage tank 1 is consumed, a certain negative pressure is formed inside the main liquid storage tank 1, and the auxiliary liquid storage tank 2 is connected to the outside air. The atomizing medium stored in the auxiliary liquid storage tank 2 is drawn back into the main liquid storage tank 1 under the action of the pressure difference, thereby realizing efficient use of the atomizing medium. At the same time, the outside air can also enter the main liquid storage tank 1 through the second air exchange valve 6b, the auxiliary liquid storage tank 2, and the first air exchange valve 6a in sequence, realizing the air pressure balance inside the main liquid storage tank 1, avoiding excessive negative pressure causing poor liquid flow and causing the atomizing core to dry burn.

[0051] Specifically, the second ventilation valve 6b can be arranged at the auxiliary top wall 21 of the auxiliary liquid storage tank 2 or at a position of the side wall of the auxiliary liquid storage tank 2 close to the auxiliary top wall 21. In this way, when the aerosol generating device is placed vertically Y and the mouthpiece 5 is facing upward, the risk of the second ventilation valve 6b being covered by the atomized medium in the auxiliary liquid storage tank 2 (i.e., the liquid level of the atomized medium is higher than the second ventilation valve 6b) can be reduced, thereby reducing the risk of the atomized medium leaking through the second ventilation valve 6b; at the same time, the second ventilation valve 6b can be directly connected to the outside air most of the time.

[0052] Specifically, a second communication hole is opened at a position of the side wall of the auxiliary liquid storage tank 2 close to the auxiliary top wall 21, and the second ventilation valve 6b is arranged in the second communication hole.

[0053] Since the second ventilation valve 6b may still be covered by the atomized medium when the aerosol generating device is placed in the horizontal direction X, there is a risk that the atomized medium leaks through the second ventilation valve 6b. Figure 3 As shown, the aerosol generating device further includes a liquid absorbing member 7, which is arranged on the side of the second ventilation valve 6b away from the auxiliary liquid storage tank 2, and is used to store the atomized medium exposed from the second ventilation valve 6b to reduce the risk of liquid leakage. The liquid absorbing member 7 can be a liquid absorbing cotton. It can be understood that the amount of atomized medium exposed from the second ventilation valve 6b is extremely small, which is far lower than the amount of atomized medium leaked from the main liquid storage tank 1 when the auxiliary liquid storage tank 2 is not provided.

[0054] In one embodiment, in combination Figure 2 and Figure 3 The aerosol generating device further includes a power supply compartment 8, which is used to accommodate a power supply 9. In this embodiment, the auxiliary liquid storage compartment 2 is connected to the power supply compartment 8, and is connected to the external gas through the power supply compartment 8; the liquid absorbing member 7 is specifically arranged in the power supply compartment 8. The liquid absorbing member 7 is placed in the power supply compartment 8 for accommodating the power supply 9, and there is no need to add a structure for placing the liquid absorbing member 7, which saves cost and space, and is conducive to realizing the miniaturization design of the product.

[0055] In specific embodiments, see Figure 4 , Figure 4 A vertical cross-sectional view of a first air exchange valve 6a or a second air exchange valve 6b provided in an embodiment of the present application. The first air exchange valve 6a and / or the second air exchange valve 6b comprises a porous matrix 61, and the porous matrix 61 has capillary pores, which can pass gas but not liquid. The pore size of the capillary pores of the porous matrix 61 is 0.1-200um. Preferably, the pore size of the capillary pores of the porous matrix 61 is 10-100um.

[0056] Furthermore, the porous matrix 61 is provided with through holes 62 that penetrate its upper and lower surfaces along its thickness direction. The porous matrix 61 utilizes capillary action to allow the liquid to rise from one side of the through hole 62 to the other side of the through hole 62 when the external conditions meet the preset conditions, thereby achieving the liquid-conducting performance of the porous matrix 61; and when the external conditions do not meet the preset conditions, the liquid cannot rise from one side of the through hole 62 to the other side of the through hole 62. At this time, the porous matrix 61 can only be air-permeable but not liquid-permeable. It can be understood that the atomization core 3 also generally includes a porous matrix and a heating element, wherein the porous matrix generally includes a liquid-absorbing surface for absorbing liquid and an atomizing surface for atomizing the atomizing medium, and the heating element is arranged on the atomizing surface of the porous matrix, and the heating element is energized to heat and atomize the atomizing medium to produce an aerosol. Therefore, since the porous matrix of the atomization core 3 is also directly connected to the main liquid storage tank 1, it may also break through its liquid-locking pressure threshold under a certain pressure, thereby causing leakage at the atomization core 3. Therefore, the purpose of providing the through hole 62 in the porous matrix 61 is to make the liquid locking threshold of the porous matrix 61 lower than the liquid locking threshold of the porous matrix of the atomizer core 3, that is, under a certain pressure, the pressure is released preferentially through the porous matrix 61 with the through hole 62. It is avoided that the pressure difference is greater than the liquid locking threshold of the porous matrix of the atomizer core 3, causing liquid leakage at the atomizer core 3. Specifically, due to the large pressure difference, the atomized medium that needs to overflow will preferentially overflow into the auxiliary liquid storage tank 2 through the first ventilation valve 6a, avoiding the occurrence of liquid leakage.

[0057] The aperture size of the through hole 62 and the thickness of the porous matrix 61 can be specifically designed according to the pressure difference between the inside and outside of the main liquid storage tank 1, the type of atomized medium, the material of the porous matrix and other parameters when the main liquid storage tank 1 leaks. As long as the pressure difference between the main liquid storage tank 1 and the auxiliary liquid storage tank 2 is greater than the liquid locking threshold, the atomized medium can flow through the through hole 62. In some specific embodiments, the diameter of the through hole 62 can be selected in the range of 10um-200um; preferably 30um-100um.

[0058] In some embodiments, the porous matrix of the atomizer core 3 and the porous matrix 61 are made of the same material, that is, the material type and pore structure of the two are the same, and the porous matrix 61 is directly provided with through holes 62 to achieve the difference in the liquid locking thresholds of the two, which can simplify the selection of raw materials and reduce costs.

[0059] The porous matrix 61 may be cylindrical for easy assembly. The porous matrix 61 may be made of silica gel, plastic, ceramic, etc. Preferably, the porous matrix 61 is a porous ceramic matrix, and the porous structure is conducive to air permeability and has good liquid locking and liquid isolation effects.

[0060] The ventilation valve of the above structure has a shorter effective stroke for sucking air flow and a smaller suction resistance.

[0061] Of course, in other embodiments, the first ventilation valve 6a and / or the second ventilation valve 6b can also be at least one structure such as a Tesla valve, a one-way movable valve or a small-diameter through hole. Among them, the Tesla valve, the one-way movable valve and other structures have unidirectional conductivity and are preferably arranged at the position of the second ventilation valve 6b; they only allow airflow to flow in from the outside and do not allow the atomized medium to leak out; and improve the anti-leakage ability of the aerosol generating device. Similarly, the small-diameter through hole structure is similar to the principle of the porous substrate 61 ventilation valve, and it can directly open at least one small-diameter through hole on the dense substrate.

[0062] In a specific embodiment, the aerosol generating device further includes a first sealing sleeve and / or a second sealing sleeve. The first sealing sleeve is disposed between the first ventilation valve 6a and the auxiliary liquid storage tank 2, and is disposed in a circle around the circumferential direction of the first ventilation valve 6a, and is used to seal the gap between the first ventilation valve 6a and the auxiliary liquid storage tank 2 to prevent leakage. The second sealing sleeve is disposed between the second ventilation valve 6b and the auxiliary liquid storage tank 2, and is disposed in a circle around the circumferential direction of the second ventilation valve 6b, and is used to seal the gap between the second ventilation valve 6b and the auxiliary liquid storage tank 2 to prevent leakage. The first sealing sleeve and / or the second sealing sleeve may be a silicone sleeve. Among them, the provision of the sealing sleeve also facilitates the assembly of the first ventilation valve 6a and the second ventilation valve 6b.

[0063] Taking into account the temperature difference within 40 degrees and the air pressure changes under air transport conditions. The ratio of the volume of the auxiliary liquid storage tank 2 to the volume of the main liquid storage tank 1 is 10% to 30%; for example, 10%, 15%, 20%, 25% or 30%. In this way, the auxiliary liquid storage tank 2 can accommodate the atomized medium that flows out due to the volume expansion of the main liquid storage tank 1 to the maximum extent. At the same time, the maximum volume of the main liquid storage tank 1 is taken into account to improve its liquid storage capacity. In a specific embodiment, the volume of the main liquid storage tank 1 is 10ml, and the volume of the auxiliary liquid storage tank 2 is 1ml. In another specific embodiment, the volume of the main liquid storage tank 1 is 10ml, and the volume of the auxiliary liquid storage tank 2 is 3ml.

[0064] In a specific embodiment, the auxiliary liquid storage tank 2, the main liquid storage tank 1 and the power supply tank 8 are arranged side by side along a direction perpendicular to the length direction Y of the aerosol generating device, that is, the width direction, so as to reduce the size of the aerosol generating device along its length direction Y.

[0065] Specific, combined Figure 2 and Figure 3 The main liquid storage tank 1 and the auxiliary liquid storage tank 2 share a side wall, and the auxiliary bottom wall 22 of the auxiliary liquid storage tank 2 also serves as the side wall of the main liquid storage tank 1. In other words, the orthographic projection of the auxiliary liquid storage tank 2 along the length direction Y of the aerosol generating device falls on the main liquid storage tank 1.

[0066] In a specific embodiment, the aerosol generating device includes a housing 10, which has a nozzle 5 and defines a main liquid storage tank 1, a secondary liquid storage tank 2, a power supply tank 8, and an air flow channel 4 connected to the nozzle 5. The power supply tank 8 shares a side wall with the secondary liquid storage tank 2 and shares part of the side wall with the main liquid storage tank 1 to simplify the structure and reduce the cost.

[0067] Of course, the aerosol generating device also includes components or structural parts such as a power supply 9, a sealing plug, an airflow sensor connected to the airflow channel 4, and a control module. The specific structure and function of these components or structural parts can be found in the introduction of existing related structures and will not be repeated here.

[0068] The aerosol generating device provided in the present embodiment comprises a main liquid storage tank 1, a sub-liquid storage tank 2 and an atomizing core 3; wherein the main liquid storage tank 1 is used to store atomizing medium; the sub-liquid storage tank 2 is connected with the main liquid storage tank 1 and the external gas; the atomizing core 3 is connected with the main liquid storage tank 1, and is used to atomize the atomizing medium flowing out of the main liquid storage tank 1 to form an aerosol; in this way, when the air pressure in the main liquid storage tank 1 is greater than the external air pressure, the atomizing medium in the main liquid storage tank 1 can flow to the sub-liquid storage tank 2, so as to store the atomizing medium exposed from the main liquid storage tank 1 through the sub-liquid storage tank 2, thereby reducing the probability of leakage; at the same time, when the air pressure in the main liquid storage tank 1 is lower than the external air pressure, the atomizing medium stored in the sub-liquid storage tank 2 can also flow back to the main liquid storage tank 1 for atomization, thereby improving the utilization rate of the atomizing medium. At the same time, the main liquid storage tank 1 is indirectly connected to the external gas through the auxiliary liquid storage tank 2, which can also achieve pressure balance in the main liquid storage tank 1, which is conducive to the flow of atomization medium to the atomization core 3 and avoids dry burning caused by insufficient liquid supply.

[0069] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An aerosol generating device, characterized in that: include: A main liquid storage tank, used to store atomizing medium; A secondary liquid storage tank, connected to the main liquid storage tank and external air; The atomizing core is communicated with the main liquid storage tank and is used for atomizing the atomizing medium flowing out of the main liquid storage tank to form an aerosol.

2. The aerosol generating device according to claim 1, characterized in that: Along the length direction of the aerosol generating device, at least a portion of the secondary liquid storage tank overlaps with the main liquid storage tank.

3. The aerosol generating device according to claim 2, characterized in that: The aerosol generating device has a mouthpiece; The auxiliary liquid storage tank has a top end and a bottom end opposite to each other along the length direction of the aerosol generating device. The top end of the auxiliary liquid storage tank is arranged close to the suction nozzle, and the bottom end of the auxiliary liquid storage tank is directly connected to the main liquid storage tank.

4. The aerosol generating device according to claim 3, characterized in that: The auxiliary liquid storage tank has an opposite auxiliary top wall and auxiliary bottom wall along the length direction of the aerosol generating device; the auxiliary bottom wall of the auxiliary liquid storage tank is directly connected to the main liquid storage tank.

5. The aerosol generating device according to claim 4, characterized in that: Also includes: a first ventilation valve, provided at the connection point between the auxiliary liquid storage tank and the main liquid storage tank; and in response to the pressure difference between the main liquid storage tank and the auxiliary liquid storage tank being not greater than the liquid locking threshold, the first ventilation valve is permeable to air but not permeable to liquid; In response to the pressure difference between the main liquid storage tank and the auxiliary liquid storage tank being greater than the liquid locking threshold, the first ventilation valve is permeable to air and liquid.

6. The aerosol generating device according to claim 5, characterized in that: The main liquid storage tank has a relative main top wall and a main bottom wall along the length direction of the aerosol generating device; the first ventilation valve is spaced apart from the main bottom wall of the main liquid storage tank; and along the length direction of the aerosol generating device, a first distance between the first ventilation valve and the main bottom wall is greater than a second distance between the first ventilation valve and the main top wall.

7. The aerosol generating device according to claim 5, characterized in that: Also includes: The second ventilation valve is arranged at the connection point between the auxiliary liquid storage tank and the external air. The auxiliary liquid storage tank is connected with the external air through the second ventilation valve; and the second ventilation valve is permeable to air but not to liquid.

8. The aerosol generating device according to claim 7, characterized in that: The second ventilation valve is arranged on the auxiliary top wall of the auxiliary liquid storage tank or on the side wall of the auxiliary liquid storage tank close to the auxiliary top wall.

9. The aerosol generating device according to claim 8, characterized in that: Also includes: The liquid absorbing member is arranged on a side of the second ventilation valve away from the auxiliary liquid storage tank, and is used for storing the atomized medium exposed from the second ventilation valve.

10. The aerosol generating device according to claim 9, characterized in that Also includes: A power supply compartment, used to accommodate a power supply; wherein the auxiliary liquid storage compartment is connected to the power supply compartment and is connected to the external gas through the power supply compartment; The liquid absorbing component is arranged in the power supply compartment.

11. The aerosol generating device according to claim 7, characterized in that: The first ventilation valve and / or the second ventilation valve comprises a porous matrix, and the porous matrix is ​​provided with through holes along the thickness direction thereof.

12. The aerosol generating device according to claim 1, characterized in that: The ratio of the volume of the auxiliary liquid storage tank to the volume of the main liquid storage tank is 10% to 30%.

13. The aerosol generating device according to claim 2, characterized in that: Along the length direction perpendicular to the aerosol generating device, the auxiliary liquid storage tank and the main liquid storage tank are arranged side by side, and the main liquid storage tank and the auxiliary liquid storage tank share a side wall, and the auxiliary bottom wall of the auxiliary liquid storage tank also serves as the side wall of the main liquid storage tank.

Images