Electronic cigarette capable of increasing air permeation valve to solve negative pressure oil leakage

Abstract

The present application provides an electronic cigarette capable of solving the problem of negative pressure oil leakage by increasing the air permeable valve. The ePTFE microporous air permeable film inside the air permeable valve assembly has special physical properties of only allowing air to pass through but not allowing tobacco tar and water to pass through. When the electronic cigarette encounters high and low temperatures or high altitude environments during transportation, resulting in negative pressure inside the sealed oil tank, external air can slowly supplement the oil tank under the action of atmospheric pressure through the microporous air permeable film, thereby directly offsetting the negative pressure generated inside the oil tank and eliminating the pressure difference between the inside and outside. From the physical root, the phenomenon of directly sucking out and overflowing the tobacco tar by the negative pressure is eliminated, and the appearance oil leakage is effectively avoided. At the same time, the air permeable valve is connected by threads and cooperates with the sealing rubber ring at the bottom, which not only ensures the structural strength of the fixed air permeable valve, but also effectively prevents the tobacco tar from leaking out of the assembly gap, forming comprehensive leakage protection.

Description

Technical Field

[0001] This invention relates to the field of electronic cigarettes, and in particular to an electronic cigarette that incorporates a vent valve to address negative pressure leakage. Background Technology

[0002] In recent years, with consumers' increasing attention to health issues and gradual improvement in environmental awareness, e-cigarettes have gained widespread acceptance and use globally due to their relatively low harm. Currently, a typical e-cigarette cartridge structure usually includes a clear e-liquid reservoir, a porous e-liquid absorber and guides the e-liquid, an atomizer coil for heating and atomizing the e-liquid, and an inlet port located between the e-liquid absorber and the reservoir. Typically, to maintain e-liquid stability and prevent accidental leakage, the reservoir is designed to be relatively sealed.

[0003] However, in the actual production and transportation of e-cigarettes, they face not only the usual room temperature environment but also potentially drastic environmental changes. Existing sealed e-cigarette tanks often experience serious leakage problems during transportation, especially when subjected to high-altitude transport (such as air freight) or passing through high-altitude areas. The root cause is that when e-cigarettes are exposed to sudden drops in temperature or high-altitude, low-pressure environments, the air inside the sealed tank physically contracts. This rapid reduction in volume creates a strong internal negative pressure. Since the inlet connects the e-cigarette tank to the e-liquid reservoir, this negative pressure generates an abnormal suction force, forcing a large amount of e-liquid rapidly into the reservoir from the inlet. When the amount of e-liquid absorbed exceeds the reservoir's maximum absorption saturation, the excess e-liquid leaks out through the atomizer coil's airflow tube or gaps in the shell, ultimately resulting in noticeable oil stains on the e-cigarette's appearance. This leakage problem not only seriously affects the product's appearance and creates a terrible user experience for consumers, but also, if the leaked e-liquid gets into the e-cigarette's battery, it can easily cause a short circuit or even serious safety hazards. At the same time, it brings e-cigarette manufacturers extremely high rework and quality control costs and damage to their business reputation.

[0004] Therefore, without changing the existing core atomization structure and airflow path of e-cigarettes, how to provide a new leak-proof structure that can effectively eliminate the negative pressure inside the e-liquid tank, prevent abnormal extraction of e-liquid due to changes in ambient air pressure, and fundamentally solve the problem of e-cigarette leakage during transportation is a technical challenge that urgently needs to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to provide an electronic cigarette that incorporates a vent valve to address negative pressure oil leakage, thereby resolving the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following solution: This invention provides an electronic cigarette that solves the problem of negative pressure oil leakage by adding a vent valve, including an oil tank shell, and an open oil tank, oil storage cotton and an atomizing core disposed in the oil tank shell; An oil inlet is provided between the open oil tank and the oil storage cotton, and the e-liquid in the open oil tank is supplied to the oil storage cotton through the oil inlet; The oil tank shell is provided with a vent valve assembly, which is used to connect the internal cavity of the oil tank shell with the external air. The breathable valve assembly includes a breathable valve body, a microporous breathable membrane, and a sealing ring; The vent valve body has a venting channel, and the microporous venting membrane is disposed in the venting channel. The microporous venting membrane is configured to allow only gas to pass through and prevent liquid e-liquid and water from passing through. The sealing ring is disposed at the assembly interface between the vent valve body and the oil tank housing, and is used to seal the assembly gap between the vent valve body and the oil tank housing.

[0007] Preferably, the vent valve body and the oil tank housing are detachably connected by threads, the outer side of the vent valve body is provided with external threads, and the oil tank housing is provided with threaded holes that are compatible with the external threads.

[0008] Preferably, the microporous breathable membrane is an expanded polytetrafluoroethylene microporous breathable membrane.

[0009] Preferably, the sealing ring is disposed between the thread root at the bottom of the vent valve body and the oil tank housing, and the sealing ring is clamped between the vent valve body and the oil tank housing to form a leak-proof seal.

[0010] Preferably, the oil-retaining cotton is arranged around the periphery of the atomizing core, and the atomizing core is used to atomize the e-liquid from the oil-retaining cotton.

[0011] Preferably, the oil inlet hole penetrates the contact wall between the open oil chamber and the oil storage cotton along the radial direction of the atomizing core, and there are multiple oil inlets.

[0012] Preferably, the oil tank housing has an air inlet at one end away from the vent valve assembly, which communicates with the outside air and provides an airflow channel for inhaling the electronic cigarette.

[0013] Preferably, the microporous breathable membrane is embedded and fixed in the breathable channel of the breathable valve body. When a negative pressure is generated inside the oil tank shell, outside air passes through the microporous breathable membrane and enters the oil tank shell.

[0014] Preferably, the sealing ring is made of silicone rubber.

[0015] The present invention achieves the following beneficial technical effects compared to the prior art: This invention provides an electronic cigarette solution that addresses negative pressure leakage by adding a vent valve. The vent valve assembly, comprising a microporous vent membrane and a sealing ring, is cleverly incorporated into the e-cigarette housing. This utilizes the principle of air pressure balance to solve the problem of negative pressure leakage caused by environmental changes. The ePTFE microporous vent membrane inside the vent valve assembly possesses the unique physical property of being permeable only to air but not to e-liquid or water. When the electronic cigarette encounters high or low temperatures or high altitudes during transportation, causing negative pressure to form inside the sealed e-cigarette housing, outside air can slowly enter the housing under atmospheric pressure through this microporous vent membrane. This directly counteracts the negative pressure inside the housing, eliminating the pressure difference and preventing the negative pressure from directly drawing out and overflowing the e-liquid, effectively avoiding visible leakage. Simultaneously, the vent valve uses a threaded connection and a sealing ring at the bottom, ensuring both the structural strength of the vent valve and effectively preventing e-liquid leakage from assembly gaps, forming comprehensive leak-proof protection. This application features a compact structure, minimal modifications, and low production costs. Without affecting the original vaping performance of the e-cigarette, it significantly improves the product's reliability against oil leakage under extreme transportation environments. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of an electronic cigarette structure for solving negative pressure oil leakage by adding a vent valve, as provided by the present invention. Detailed Implementation

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

[0019] The purpose of this invention is to provide an electronic cigarette that incorporates a vent valve to address negative pressure oil leakage, thereby resolving the problems existing in the prior art.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1: like Figure 1 As shown, this embodiment provides an electronic cigarette that solves the problem of negative pressure leakage by adding a vent valve. The electronic cigarette mainly includes an e-liquid tank shell, and an e-liquid chamber 1, an e-liquid storage cotton 2, and an atomizing core 3 disposed inside the e-liquid chamber shell. The e-liquid chamber 1 serves as a cavity for storing e-liquid, and the e-liquid storage cotton 2 is arranged adjacent to it. The e-liquid storage cotton 2 is made of a porous fiber material with capillary adsorption properties, which can effectively adsorb and store e-liquid. The atomizing core 3 is centrally located inside the e-liquid storage cotton 2, and the e-liquid storage cotton 2 surrounds and covers the atomizing core 3. The atomizing core 3 receives e-liquid supplied from the e-liquid storage cotton 2 and heats and atomizes the e-liquid through an internal heating element to form an aerosol that can be inhaled by the user. An e-liquid inlet 4 is provided on the partition wall between the e-liquid chamber 1 and the e-liquid storage cotton 2, and the e-liquid inlet 4 penetrates the contact wall between the e-liquid chamber 1 and the e-liquid storage cotton 2. Under the influence of gravity and capillary action, the e-liquid in the e-liquid reservoir 1 can continuously permeate through the e-liquid inlet 4 and be introduced into the e-liquid storage cotton 2. In a specific embodiment, in order to ensure the uniformity and efficiency of e-liquid supply, the number of e-liquid inlet 4 can be set to multiple, and these e-liquid inlet 4 are distributed in a circumferential pattern along the axial direction of the atomizing core 3, so that there is an e-liquid source all around the e-liquid storage cotton 2, thereby ensuring that the atomizing core 3 can be sufficiently wetted with e-liquid during operation.

[0022] like Figure 1As shown, to effectively solve the problem of air pressure imbalance caused by drastic temperature changes and high-altitude environments during the transportation of e-cigarettes, the core improvement of this invention lies in adding a vent valve assembly to the side wall of the oil tank shell. The vent valve assembly is mainly used to connect the internal chamber of the oil tank shell with the outside atmosphere, thereby balancing the internal and external air pressure. Specifically, the vent valve assembly consists of a vent valve body, an ePTFE microporous vent membrane 6, and a sealing ring 7. The vent valve body is specifically constructed as a threaded vent valve 5. The outer surface of the threaded vent valve 5 has external threads, and a corresponding mounting hole with internal threads is opened on the side wall of the oil tank shell. The threaded vent valve 5 is tightened and fixed to the oil tank shell through these threads. An axially penetrating vent channel is provided inside the threaded vent valve 5, which connects the external air with the internal environment of the oil tank shell. The ePTFE microporous breathable membrane 6, also known as expanded polytetrafluoroethylene microporous breathable membrane, is embedded and fixed in the breathable channel within the breathable valve body. The ePTFE microporous breathable membrane 6 possesses extremely unique physical properties; its micropore diameter is designed to be smaller than the diameter of e-liquid molecules but larger than the diameter of air molecules. Therefore, this membrane allows air molecules to pass through freely, while effectively trapping and blocking the passage of liquid e-liquid and water, thus achieving the technical effect of allowing air to pass through but not e-liquid. To further prevent e-liquid leakage from the assembly gap between the threaded breathable valve 5 and the oil tank housing, a sealing ring 7 is fitted between the thread root at the bottom of the breathable valve body and the contact surface of the oil tank housing. When the threaded breathable valve 5 is tightened in place, the sealing ring 7 is clamped between the bottom end face of the breathable valve body and the inner wall of the oil tank housing and subjected to axial compression, thereby forming an effective anti-side leakage sealing structure, completely eliminating the possibility of e-liquid overflowing along the threaded gap.

[0023] On the other hand, an air inlet 8 is provided at the bottom end of the oil tank shell, away from the vent valve assembly, and the air inlet 8 is connected to the outside air. When the user inhales through the electronic cigarette, outside air can enter the inside of the oil tank shell through the air inlet 8, and pass upward through the airflow channel through the atomizing core 3, and finally carry the aerosol generated by the heating and atomization of the atomizing core 3 to the user's mouth. The air inlet 8 provides the necessary physical airflow channel for the normal inhalation and atomization of the electronic cigarette.

[0024] The following provides a detailed description of the working process and principle of the electronic cigarette provided by this invention in complex transportation environments. During the production, manufacturing, and shipping of electronic cigarettes, air freight or passage through high-altitude areas can cause a sudden drop in air pressure, and the ambient temperature may drop sharply during winter or cold chain transportation. Under these harsh external conditions, the air inside the originally sealed oil tank shell will contract in volume. This volume contraction will create a significant negative pressure state inside the oil tank shell. If this negative pressure is not eliminated in time, it will generate abnormal suction force, directly forcibly drawing a large amount of e-liquid from the open oil tank 1 into the oil storage cotton 2 through the oil inlet 4. When the amount of e-liquid drawn in exceeds the saturation absorption limit of the oil storage cotton 2, the excess e-liquid will overflow and flow out along the air passage to the outside of the electronic cigarette, causing serious oil leakage.

[0025] With the technical solution of this invention, when the aforementioned negative pressure occurs inside the oil tank shell, the external atmospheric pressure will be higher than the pressure inside the oil tank shell. Because the vent valve assembly is connected to the outside through the ePTFE microporous vent membrane 6, external air will slowly and continuously pass through the ePTFE microporous vent membrane 6 under atmospheric pressure and eventually fill the internal cavity of the oil tank shell. The replenished air can effectively fill the volume gap caused by environmental changes, thereby quickly and effectively eliminating the negative pressure inside the oil tank shell, so that the air pressure inside the oil tank shell and the external atmospheric pressure can reach a relative balance again. After the internal and external pressures are balanced, the abnormal suction force generated by the negative pressure is completely eliminated, thereby fundamentally preventing the e-liquid at the oil inlet 4 from being forcibly drawn into the oil storage cotton 2, and eliminating the problem of e-liquid overflow causing visible oil leakage. At the same time, the sealing ring 7 at the bottom of the vent valve ensures that the vent valve assembly area maintains good sealing performance under static conditions, preventing e-liquid from leaking from the side. In summary, this embodiment, by cleverly utilizing the gas-liquid separation characteristics and pressure balance mechanism of the ePTFE microporous breathable membrane 6, significantly improves the leak-proof reliability of electronic cigarettes in complex and variable environments without interfering with the original normal inhalation airflow path of the electronic cigarette.

[0026] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0027] It should be noted that the components mentioned in the above embodiments are all general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0028] This invention has illustrated its principles and implementation methods using specific examples. The descriptions of these embodiments are merely illustrative of the method and its core ideas; furthermore, those skilled in the art will recognize that modifications may be made to the specific implementation methods and application scope based on the principles of this invention. Therefore, the content of this specification should not be construed as limiting the invention.

Claims

1. An electronic cigarette that incorporates a vent valve to address negative pressure oil leakage, characterized in that, It includes an oil tank shell, and an open oil tank, oil storage cotton and atomizing core disposed within the oil tank shell; An oil inlet is provided between the open oil tank and the oil storage cotton, and the e-liquid in the open oil tank is supplied to the oil storage cotton through the oil inlet; The oil tank shell is provided with a vent valve assembly, which is used to connect the internal cavity of the oil tank shell with the external air. The breathable valve assembly includes a breathable valve body, a microporous breathable membrane, and a sealing ring; The vent valve body has a venting channel, and the microporous venting membrane is disposed in the venting channel. The microporous venting membrane is configured to allow only gas to pass through and prevent liquid e-liquid and water from passing through. The sealing ring is disposed at the assembly interface between the vent valve body and the oil tank housing, and is used to seal the assembly gap between the vent valve body and the oil tank housing.

2. The electronic cigarette with a vent valve to solve negative pressure oil leakage according to claim 1, characterized in that, The vent valve body and the oil tank housing are detachably connected by threads. The outer side of the vent valve body is provided with external threads, and the oil tank housing is provided with threaded holes that are compatible with the external threads.

3. The electronic cigarette with a vent valve to solve negative pressure oil leakage according to claim 1, characterized in that, The microporous breathable membrane is an expanded polytetrafluoroethylene microporous breathable membrane.

4. The electronic cigarette with a vent valve to solve negative pressure oil leakage according to claim 1, characterized in that, The sealing ring is disposed between the thread root at the bottom of the vent valve body and the oil tank housing, and the sealing ring is clamped between the vent valve body and the oil tank housing to form a leak-proof seal.

5. The electronic cigarette with a vent valve to solve negative pressure oil leakage according to claim 1, characterized in that, The oil-retaining cotton is arranged around the periphery of the atomizing core, which is used to atomize the e-liquid from the oil-retaining cotton.

6. The electronic cigarette with a vent valve to solve negative pressure oil leakage according to claim 1, characterized in that, The oil inlet hole penetrates the contact wall between the open oil chamber and the oil storage cotton along the radial direction of the atomizing core, and there are multiple oil inlets.

7. The electronic cigarette with a vent valve to solve negative pressure oil leakage according to claim 1, characterized in that, The oil tank housing has an air inlet at one end away from the vent valve assembly, which communicates with the outside air and provides an airflow channel for inhaling the electronic cigarette.

8. The electronic cigarette with a vent valve to solve negative pressure oil leakage according to claim 1, characterized in that, The microporous breathable membrane is embedded and fixed in the breathable channel of the breathable valve body. When a negative pressure is generated inside the oil tank shell, outside air passes through the microporous breathable membrane and enters the oil tank shell.

9. The electronic cigarette with a vent valve to solve negative pressure oil leakage according to claim 1, characterized in that, The sealing ring is made of silicone rubber.

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