Atomizer with internal and external air exchange structure and electronic cigarette thereof

Abstract

The utility model discloses a kind of atomizer and electronic cigarette with inside and outside ventilation structure, it is related to electronic cigarette technical field, wherein, the atomizer with inside and outside ventilation structure includes: first sleeve, at least one first ventilation port is equipped on the first sleeve;Second sleeve, the second sleeve is coaxially inserted in the first sleeve, at least one second ventilation port is also equipped on the second sleeve, at least one the second ventilation port is communicated with the first ventilation port;First oil guide cotton is equipped in the second sleeve.The utility model can make the inside and outside air pressure of cartridge reach new balance rapidly, prevent cartridge oil leakage through ventilation pressure test, improve cartridge use quality.

Description

Technical Field

[0001] This utility model relates to the field of electronic cigarette technology, and in particular to an atomizer with an internal and external air exchange structure and its electronic cigarette. Background Technology

[0002] As a substitute for traditional tobacco, e-cigarettes have gained widespread use globally due to their harm-reduction properties and ease of use. The cotton wick, as the core component of an e-cigarette, is responsible for guiding, storing, and atomizing e-liquid; its performance directly determines the user experience and product quality. Currently, mainstream cotton wick atomizers typically consist of an inner tube, a cotton wick, a storage chamber, and a heating element. During operation, the cotton wick's capillary action guides the e-liquid from the storage chamber to the heating element, where it is heated and atomized into an inhalable aerosol.

[0003] The existing cotton wick atomizer core has an unreasonable internal tube ventilation structure design, such as improper venting hole position, insufficient airway cross-sectional area, or poor airflow guidance. This leads to untimely air replenishment or unbalanced air pressure regulation in the oil storage chamber, causing e-liquid to leak through the cotton wick gaps, airway interfaces, and other parts under the action of pressure difference. Utility Model Content

[0004] The main objective of this invention is to propose an atomizer with an internal and external air exchange structure and its electronic cigarette, aiming to... To achieve the above objectives, the present invention proposes an atomizer with an internal and external air exchange structure, comprising: The first sleeve is provided with at least one first air exchange port; The second sleeve is coaxially inserted into the first sleeve. The second sleeve is also provided with at least one second vent, which is connected to the first vent. The second sleeve is provided with a first oil-guiding cotton.

[0005] In one embodiment, the second sleeve is further provided with at least one ventilation groove.

[0006] In one embodiment, the ventilation groove extends axially along the second sleeve. In one embodiment, the ventilation groove is connected to the second ventilation port, and the ventilation groove extends from the second ventilation port along the axial direction of the second sleeve toward the end of the second sleeve.

[0007] In one embodiment, the first oil-wicking cotton covers the second ventilation port.

[0008] In one embodiment, the ventilation groove protrudes beyond the first oil-guiding cotton.

[0009] In one embodiment, a second oil-guiding cotton is further provided inside the second sleeve, and the second oil-guiding cotton and the first oil-guiding cotton are spaced apart along the axial direction.

[0010] In one embodiment, the first sleeve includes a first extension section, a second extension section, a contraction section, and a third extension section connected sequentially along the axial direction. Wherein, the inner diameter of the first extension section is larger than the inner diameter of the second extension section, the inner diameter of the second extension section is larger than the inner diameter of the third extension section, a first installation space is formed between the first extension section and the outer wall of the second sleeve, a sealing element is fitted on the second sleeve, the sealing element is located in the first installation space, and the sealing element abuts against the inner wall of the first extension section.

[0011] In one embodiment, the first air exchange port is arranged in a circular array along the circumference of the first sleeve; the second air exchange port is arranged in a circular array along the circumference of the second sleeve.

[0012] This utility model also proposes an electronic cigarette, including an atomizer with an internal and external air exchange structure as described above.

[0013] The technical solution of this utility model employs a coaxially assembled first and second sleeve, along with a connected air vent and an internal first wicking cotton. The first sleeve, as the outer structure, provides an inlet for the flow of air and e-liquid through its first air vent. The second sleeve is coaxially inserted into the first sleeve, with a second air vent on the second sleeve connected to the first air vent of the first sleeve, allowing air and e-liquid within the gap to smoothly enter the second sleeve. The first wicking cotton filling the second sleeve both adsorbs the e-liquid entering from the second air vent through capillary action, guiding it to the subsequent atomization structure, and retains a path for gas flow through the tiny gaps between the fibers. When the e-liquid in the cartridge decreases due to use, the air pressure inside the cartridge decreases accordingly. At this time, external air enters the gap between the first and second sleeves through the first air vent, then passes through the fiber gaps of the first wicking cotton via the connected second air vent, quickly replenishing the cartridge and rapidly restoring the internal air pressure to atmospheric pressure. This not only ensures a normal supply of e-liquid but also achieves dynamic pressure balance, ultimately effectively preventing e-liquid leakage from the cartridges and improving the quality and stability of e-cigarette use. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0015] Figure 1 A schematic diagram of the structure of an embodiment of the atomizer provided by this utility model; Figure 2 A cross-sectional view of an embodiment of the atomizer provided by this utility model; Figure 3 An exploded view of the atomizer provided by this utility model.

[0016] Explanation of icon numbers: 100, First sleeve; 110, First vent; 120, First extension section; 130, Second extension section; 140, Contraction section; 150, Third extension section; 200, Second sleeve; 210, Second vent; 220, Ventilation groove; 300, First oil-guiding cotton; 400, Second oil-guiding cotton; 500, First installation space; 600, Seal.

[0017] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0019] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0020] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0021] Existing cotton wick atomizers often suffer from problems due to unreasonable internal tube ventilation design, such as improper vent placement and insufficient airway cross-sectional area. This leads to untimely air replenishment in the e-liquid reservoir, resulting in pressure imbalance and e-liquid leakage under pressure differential, severely impacting the e-cigarette user experience. To address this issue, this invention proposes an atomizer with an internal and external ventilation structure. By optimizing the ventilation structure design of the inner and outer tubes, rapid pressure balance is achieved inside and outside the cartridge, effectively preventing e-liquid leakage.

[0022] Please see Figures 1 to 3 In one embodiment of this utility model, the atomizer with an internal and external air exchange structure includes: The first sleeve 100 is provided with at least one first ventilation port 110; The second sleeve 200 is coaxially inserted into the first sleeve 100. The second sleeve 200 is also provided with at least one second vent 210, which is connected to the first vent 110. The second sleeve 200 is provided with a first oil-guiding cotton 300.

[0023] In this embodiment, a first sleeve 100 and a second sleeve 200 are coaxially assembled, with a connected air vent and an internal first wicking cotton 300. The first sleeve 100 serves as the outer layer, and its first air vent 110 provides an inlet for the flow of air and e-liquid. The second sleeve 200 is coaxially inserted into the first sleeve 100, and its second air vent 210 is connected to the first air vent 110 of the first sleeve 100, allowing air and e-liquid within the gap to smoothly enter the interior of the second sleeve 200. The first wicking cotton 300 filling the second sleeve 200 both adsorbs the e-liquid entering from the second air vent 210 through capillary action, guiding it to the subsequent atomization structure, and retains the path for gas flow through the tiny gaps between the fibers. When the e-liquid in the cartridge decreases due to use, the air pressure inside the cartridge drops. At this time, external air enters through the first air vent 110 into the gap between the first sleeve 100 and the second sleeve 200, and then passes through the fiber gaps of the first wicking cotton 300 via the connected second air vent 210, quickly replenishing the cartridge and rapidly restoring the air pressure inside the cartridge to balance with atmospheric pressure. This ensures a normal supply of e-liquid and achieves dynamic air pressure balance, ultimately effectively preventing cartridge leakage and improving the quality and stability of e-cigarette use.

[0024] In this embodiment, the first sleeve 100 serves as the outer tube of the core, made of food-grade stainless steel, with an inner diameter of 5.08 mm. It has eight 0.8 mm diameter first ventilation ports 110 evenly distributed circumferentially, with a central angle of 45° between adjacent ports to ensure that e-liquid and air can enter the sleeve gap evenly. The second sleeve 200 serves as the inner tube of the core, with an outer diameter of 5.1 mm, matching the inner diameter of the first sleeve 100. It is coaxially inserted into the first sleeve 100. It has three 2 mm diameter second ventilation ports 210 evenly distributed circumferentially, with a 90° gap between adjacent ports. Each second ventilation port 210 communicates with a first ventilation port 110 on the first sleeve 100, ensuring that e-liquid can smoothly enter the second sleeve 200 from the first sleeve 100. The second sleeve 200 is tightly filled with the first oil-guiding cotton 300, which is made of composite fiber material and has excellent capillary oil-guiding performance. When filled, it just covers the second air exchange port 210. The fiber structure of the oil-guiding cotton can both absorb the e-liquid entering through the second air exchange port 210 and retain tiny gaps to allow gas flow, thus realizing the dual functions of oil guiding and air exchange.

[0025] Please see Figures 1 to 3 To further improve ventilation efficiency, in one embodiment, the second sleeve 200 is also provided with at least one ventilation groove 220.

[0026] In this embodiment, specifically, the ventilation groove 220 is formed on the wall of the second sleeve 200 and communicates with the second ventilation port 210, providing a more direct and less resistant channel for airflow. As the e-liquid in the cartridge gradually decreases due to use, the air pressure inside the cartridge's cavity will decrease accordingly. At this time, in addition to entering the gap between the first sleeve 100 and the second sleeve 200 through the first ventilation port 110 and then passing through the fiber gaps of the first wicking cotton 300 through the second ventilation port 210 to replenish the air, external air can also directly enter the interior of the second sleeve 200 along the ventilation groove 220. The air does not need to rely entirely on the tiny gaps of the wicking cotton for diffusion, but can quickly reach the cavity area inside the second sleeve 200 through the ventilation groove 220, significantly shortening the airflow path and accelerating the speed of air pressure balance.

[0027] When a user inhales e-cigarettes, causing the e-liquid to decrease, the internal air pressure of the cartridge drops instantly. At this moment, external air enters simultaneously through two paths: one is through the first air vent 110 → sleeve gap → second air vent 210 → first wicking cotton 300 gap → inside the second sleeve 200; the other is through the first air vent 110 → sleeve gap → second air vent 210 → air vent 220 → inside the second sleeve 200. Compared to the single path relying solely on the wicking cotton gap, the addition of the air vent 220 is equivalent to adding another channel. Especially when the wicking cotton becomes partially blocked due to absorbing e-liquid, the air vent 220 can still maintain smooth airflow, ensuring that the internal and external air pressure of the cartridge returns to balance in a very short time.

[0028] Please see Figures 1 to 3 In one embodiment, the ventilation groove 220 extends along the axial direction of the second sleeve 200.

[0029] In this embodiment, the axially extending ventilation groove 220 perfectly conforms to the cylindrical structure of the second sleeve 200, so that airflow does not need to change direction, and resistance is minimized. For example, when the e-liquid descends and causes a sudden drop in air pressure in the area near the bottom of the second sleeve 200, the axial groove allows air to directly reach the low-pressure area from the second ventilation port 210 with the shortest path, without having to detour through the inner wall of the sleeve or between the oil-guiding cotton, which greatly shortens the time for air replenishment.

[0030] Meanwhile, the axially extending groove can cover the entire axial range of the second sleeve 200, allowing air to be evenly diffused to every corner inside the second sleeve 200.

[0031] Please see Figures 1 to 3 In one embodiment, the ventilation groove 220 is connected to the second ventilation port 210, and the ventilation groove 220 extends from the second ventilation port 210 along the axial direction of the second sleeve 200 toward the end of the second sleeve 200.

[0032] In this embodiment, the ventilation groove 220 is seamlessly connected to the second ventilation port 210, forming a continuous, elongated channel from the second ventilation port 210 to the bottom of the second sleeve 200. Each second ventilation port 210 is accompanied by an axially extending ventilation groove 220, the groove completely conforming to the cylindrical surface of the second sleeve 200 without any bending or offset. This expands the point-type air intake of the second ventilation port 210 into a linear air intake. The ventilation groove 220 directly connects the second ventilation port 210 to the bottom of the second sleeve 200. After air enters the gap between the inner and outer sleeves from the first ventilation port 110, it enters the ventilation groove 220 through the second ventilation port 210, and then travels axially along the groove to the low-pressure area at the bottom. There is no need to bypass the oil-guiding cotton or change the flow direction, minimizing resistance.

[0033] Please see Figures 1 to 3 In one embodiment, the first oil-wicking cotton 300 covers the second ventilation port 210.

[0034] In this embodiment, the first oil-guiding cotton 300 is made of composite plant fiber material, which has high porosity and excellent capillary oil guiding performance. When it is tightly filled inside the second sleeve 200, the outer peripheral surface of the cotton body is exactly in complete contact with the inner wall of the second sleeve 200, and the cotton fibers are directly filled into the edge area of ​​the second ventilation port 210, covering it. When e-liquid enters the annular gap between the inner and outer sleeves through the first ventilation port 110 of the first sleeve 100, it comes into contact with the first wicking cotton 300 through the second ventilation port 210. The capillary action of the cotton fibers quickly absorbs the e-liquid, guiding it from the outside of the second sleeve 200 to the inside, providing a continuous supply of e-liquid for subsequent atomization. On the other hand, when the e-liquid in the cartridge decreases due to use and the internal air pressure drops, external air will quickly replenish the inside of the second sleeve 200 along the path of "first ventilation port 110 → gap between inner and outer sleeves → second ventilation port 210 → gap between fibers of the first wicking cotton 300", restoring the internal air pressure of the cartridge to balance with the atmospheric pressure.

[0035] In this embodiment, the oil-guiding cotton covering the second ventilation hole not only prevents direct leakage of e-liquid through the physical filling of the cotton body (the e-liquid must enter the cotton body through capillary action), but also retains the airflow path by utilizing the gaps between the fibers, thus avoiding oil leakage.

[0036] Please see Figures 1 to 3 In one embodiment, the ventilation groove 220 protrudes from the first oil-guiding cotton 300.

[0037] In this embodiment, the ventilation groove 220 extends from the second ventilation port 210 to the bottom of the second sleeve 200. Even if the first oil-guiding cotton 300 fills the middle of the second sleeve 200, the part of the groove near the bottom still protrudes outside the oil-guiding cotton. In this way, air can not only diffuse through the gaps in the oil-guiding cotton, but also directly enter the cavity at the bottom of the second sleeve 200 from the protruding groove, ensuring that the air pressure inside the entire second sleeve 200 is synchronously balanced, and avoiding the e-liquid being sucked out of the cotton core due to local low air pressure.

[0038] Please see Figures 1 to 3 In one embodiment, the second sleeve 200 is further provided with a second oil-guiding cotton 400, which is axially spaced from the first oil-guiding cotton 300.

[0039] In the existing technology, if only one piece of oil-guiding cotton is used to fill the second sleeve 200, after the e-liquid enters through the second air vent 210, it will be concentrated and absorbed in the area of ​​the oil-guiding cotton near the second air vent 210, and then flow directly to the heating element. When the amount of e-liquid absorbed exceeds the carrying capacity of the cotton, the excess e-liquid will flow quickly along the cotton to the heating element, resulting in excessive e-liquid accumulation, causing oil leakage or "oil splattering". When the e-liquid is consumed too quickly, the heating element at the far end of the oil-guiding cotton may dry-burn due to lack of oil.

[0040] In this embodiment, the first wicking cotton 300 initially absorbs and stores e-liquid. When e-liquid enters through the second vent 210, the capillary action of the cotton fibers quickly absorbs and evenly distributes the e-liquid within the cotton body. The e-liquid in the first wicking cotton 300 needs to slowly permeate through the gaps to the second wicking cotton 400, rather than flowing directly. This limits the flow rate of the e-liquid, ensuring that the second wicking cotton 400 always receives only the appropriate amount of e-liquid required for atomization. The second wicking cotton 400 adheres to the heating element, evenly guiding the permeated e-liquid to the surface of the heating wire, ensuring both continuous atomization and preventing excessive e-liquid accumulation.

[0041] When e-liquid is injected into the cartridge, it enters the gap between the inner and outer sleeves through the first air vent 110 of the first sleeve 100, and is then absorbed by the first wicking cotton 300 through the second air vent 210. At this time, the first wicking cotton 300 stores the e-liquid, which then slowly seeps into the second wicking cotton 400 through the gap. When the user inhales, the heating element heats the e-liquid in the second wicking cotton 400, and the consumed portion is immediately replenished by the first wicking cotton 300 through the gap. The whole process maintains a dynamic balance: there will be no leakage due to excessive storage of e-liquid in the first wicking cotton 300, nor will there be dry burning due to insufficient e-liquid in the second wicking cotton 400.

[0042] Please see Figures 1 to 3 In one embodiment, the first sleeve 100 includes a first extension 120, a second extension 130, a contraction section 140 and a third extension 150 connected sequentially along the axial direction. Wherein, the inner diameter of the first extension segment 120 is larger than the inner diameter of the second extension segment 130, the inner diameter of the second extension segment 130 is larger than the inner diameter of the third extension segment 150, a first installation space 500 is formed between the first extension segment 120 and the outer wall of the second sleeve 200, a sealing element is fitted on the second sleeve 200, the sealing element is located in the first installation space 500, and the sealing element abuts against the inner wall of the first extension segment 120.

[0043] In the prior art, the connection between the inner and outer sleeves often leads to e-liquid leakage due to gaps: when e-liquid enters the annular gap between the inner and outer sleeves through the first air exchange port 110 of the first sleeve 100, if the upper end is not sealed, the e-liquid may overflow upwards along the gap or leak out from the sleeve connection.

[0044] In this embodiment, the first sleeve 100 adopts a segmented structure design, and is connected sequentially along the axial direction by the first extension section 120, the second extension section 130, the contraction section 140 and the third extension section 150. The inner diameter of each section decreases in a step-like manner—the inner diameter of the first extension section 120 is greater than that of the second extension section 130, and the inner diameter of the second extension section 130 is greater than that of the third extension section 150.

[0045] The seal is an independent annular component that fits over the upper end of the second sleeve 200. When the second sleeve 200 is inserted into the first sleeve 100, the seal fits precisely into the installation space formed by the first extension section 120 and is tightly fitted to the inner wall.

[0046] The segmented structure of the first sleeve 100 creates installation space through a decreasing inner diameter. Combined with the interference fit of the sealing element, it completely seals the upper gap between the inner and outer sleeves, preventing e-liquid from leaking from that end.

[0047] Please see Figures 1 to 3 In one embodiment, the first air exchange port 110 is arranged in a circular array along the circumference of the first sleeve 100; the second air exchange port 210 is arranged in a circular array along the circumference of the second sleeve 200.

[0048] In this embodiment, the first ventilation ports 110 are arranged in a circular array along the circumference of the first sleeve 100; the second ventilation ports 210 are arranged in a circular array along the circumference of the second sleeve 200. Specifically, the first sleeve 100 serves as the outer tube of the core, and has eight first ventilation ports 110 with a diameter of 0.8 mm, evenly distributed along the circumference. Preferably, the central angle between two adjacent first ventilation ports 110 is 45°.

[0049] The second sleeve 200 serves as the inner tube of the core, and it has three second ventilation ports 210 with a diameter of 2mm, which are also evenly distributed circumferentially. Preferably, the central angle between two adjacent second ventilation ports 210 is 90°, and the position of each second ventilation port 210 roughly corresponds to the first ventilation port 110 on the first sleeve 100. The second ventilation port 210 is precisely aligned with the area below the first ventilation port 110 to ensure that the two are connected.

[0050] For the first ventilation port 110 of the first sleeve 100, the eight evenly distributed holes allow e-liquid to enter the annular gap between the first sleeve 100 and the second sleeve 200 simultaneously and in equal amounts from all directions. When e-liquid is injected into the cartridge, it flows evenly into the gap through the eight first ventilation ports 110, forming an oil film of uniform thickness on the outer wall of the second sleeve 200. This prevents e-liquid from accumulating in the gap due to excessive oil intake on one side, or from localized oil shortage in the wicking cotton due to insufficient oil intake on one side. For the second ventilation port 210 of the second sleeve 200, the three evenly distributed holes allow the e-liquid in the gap to contact the first wicking cotton 300 evenly. The first wicking cotton 300 tightly fills the second sleeve 200, perfectly corresponding to the positions of the three second ventilation ports 210. E-liquid is evenly absorbed into the cotton body through each second ventilation port 210, and then diffuses throughout the cotton body through the fiber gaps. This completely avoids the problem of e-liquid concentrating in one place, causing localized saturation and leakage in the cotton body.

[0051] As the e-liquid in the cartridge decreases due to inhalation, external air enters the gap through the first air inlet 110. The eight arrays of the first air inlets 110 allow air to flow in simultaneously from multiple directions, quickly filling the entire annular gap. Subsequently, air enters the interior of the second sleeve 200 through the three arrays of the second air inlets 210. The design of multiple air inlets allows air to be evenly diffused to every corner of the second sleeve 200, such as the bottom area near the atomizer head, the middle area of ​​the first wicking cotton 300, and even the gaps between the wicking cotton, ensuring that the air pressure inside the entire second sleeve 200 is synchronously restored to balance.

[0052] This utility model also proposes an electronic cigarette, including an atomizer with an internal and external air exchange structure as described above. The specific structure of the atomizer with the internal and external air exchange structure is as described in the above embodiments. Since this electronic cigarette adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0053] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An atomizer with an internal and external air exchange structure, characterized in that, include: The first sleeve is provided with at least one first air exchange port; The second sleeve is coaxially inserted into the first sleeve. The second sleeve is also provided with at least one second vent, which is connected to the first vent. The second sleeve is provided with a first oil-guiding cotton.

2. The atomizer with an internal and external air exchange structure as described in claim 1, characterized in that, The second sleeve is also provided with at least one ventilation slot.

3. The atomizer with an internal and external air exchange structure as described in claim 2, characterized in that, The ventilation groove extends along the axial direction of the second sleeve.

4. The atomizer with an internal and external air exchange structure as described in claim 3, characterized in that, The ventilation groove is connected to the second ventilation port, and the ventilation groove extends from the second ventilation port along the axial direction of the second sleeve to the end of the second sleeve.

5. The atomizer with an internal and external air exchange structure as described in claim 1, characterized in that, The first oil-wicking cotton covers the second ventilation port.

6. The atomizer with an internal and external air exchange structure as described in claim 3, characterized in that, The ventilation groove protrudes beyond the first oil-wicking cotton.

7. The atomizer with an internal and external air exchange structure as described in claim 1, characterized in that, The second sleeve is also provided with a second oil-guiding cotton, which is spaced apart from the first oil-guiding cotton along the axial direction.

8. The atomizer with an internal and external ventilation structure as described in claim 1, characterized in that, The first sleeve includes a first extension section, a second extension section, a contraction section, and a third extension section connected sequentially along the axial direction. Wherein, the inner diameter of the first extension section is larger than the inner diameter of the second extension section, the inner diameter of the second extension section is larger than the inner diameter of the third extension section, a first installation space is formed between the first extension section and the outer wall of the second sleeve, a sealing element is fitted on the second sleeve, the sealing element is located in the first installation space, and the sealing element abuts against the inner wall of the first extension section.

9. The atomizer with an internal and external air exchange structure as described in claim 1, characterized in that, The first air exchange port is arranged in a circular array along the circumference of the first sleeve; the second air exchange port is arranged in a circular array along the circumference of the second sleeve.

10. An electronic cigarette, characterized in that, Includes an atomizer with an internal and external ventilation structure as described in any one of claims 1 to 9.

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