Electronic atomization device

Abstract

The invention relates to an electronic atomization device, and relates to the technical field of atomization devices. The electronic atomization device is provided with an oil storage bin and comprises a shell and a support installed in the shell, the support is provided with an oil discharging channel and an air return channel, the oil discharging channel is communicated with the oil storage bin, one end of the air return channel is communicated with the oil storage bin, the other end of the air return channel is communicated with the atmosphere, and a hydrophobic coating is arranged on the surface of the air return channel. The contact angle between the atomized liquid and the lower oil channel is smaller than 90 degrees, the atomized liquid can easily pass through the lower oil channel, and the contact angle between the atomized liquid and the hydrophobic coating is larger than 90 degrees and smaller than 180 degrees, so that the atomized liquid is in a liquid bead shape on the hydrophobic coating. Meanwhile, due to the fact that the size of the air return channel of the electronic atomization device is usually small, the atomized liquid is difficult to directly enter the air return channel under the hydrophobic effect of the air return channel, and therefore the probability that the atomized liquid leaks from the air return channel can be reduced. And through the hydrophobic coating, the leakage probability is reduced, and meanwhile the air return pressure is reduced.

Description

Technical Field

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

[0002] In electronic atomization equipment, an air return structure is usually set up to ensure smooth delivery of the atomized liquid. The current air return structures are generally divided into two types: the first air return structure directly uses small holes or small grooves to return air, and there is no one-way valve to control the oil on this air return structure; the second air return structure uses small holes or small grooves to return air, and a one-way valve or a maze structure is designed on the small holes and small grooves to avoid leakage. Leakage from the air return structure has become the main way for atomization equipment to leak. The air return performance of the first air return structure mentioned above is good, but the air return structure is prone to leakage. The second air return structure has a better anti-leakage effect, but the setting of a one-way valve or a maze structure will cause the return air pressure to increase. The return air pressure can usually reach 200Pa, which will cause the oil to not flow smoothly during suction, resulting in a dry or burnt taste, and a poor user experience. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes an electronic atomization device that can reduce the probability of atomized liquid leaking from a return air channel.

[0004] The electronic atomization device of the embodiment of the present application has an oil storage tank for storing atomized liquid. The electronic atomization device includes a shell and a bracket installed in the shell, the bracket is provided with a lower oil channel and a return air channel, the lower oil channel is connected to the oil storage tank, one end of the return air channel is connected to the oil storage tank, and the other end of the return air channel is connected to the atmosphere; the surface of the return air channel is provided with a hydrophobic coating, the contact angle between the atomized liquid and the lower oil channel is less than 90°, the atomized liquid can easily pass through the lower oil channel, and the contact angle between the atomized liquid and the hydrophobic coating is greater than 90° and less than 180°, so that the atomized liquid is in the form of liquid droplets on the hydrophobic coating.

[0005] Furthermore, the hydrophobic coating comprises SiO2 nanoparticles and fluorine-containing acrylate polymers, and the mass ratio of the SiO2 nanoparticles to the fluorine-containing acrylate polymer is n:1, and n>1.2.

[0006] Furthermore, n=1.4.

[0007] Furthermore, the electronic atomization device also includes a first seal, which is at least partially mounted on the bracket, and a first return air groove and a second return air groove intersecting with the first return air groove are provided at one end of the bracket close to the oil storage tank, and the inner wall of the first seal and the first return air groove and the second return air groove define the return air channel.

[0008] Furthermore, the bracket is also provided with a third air return groove and a fourth air return groove, one end of the third air return groove is connected to the second air return groove, and the other end of the third air return groove extends laterally and intersects with one end of the fourth air return groove.

[0009] Furthermore, the width of the air return channel is 0.2±0.03 mm, and the height of the air return channel is 0.2±0.03 mm.

[0010] Furthermore, the bracket is provided with an oil inlet hole, the oil inlet hole is connected to an end of the lower oil channel away from the oil storage tank, and the surface of the oil inlet hole is hydrophilic.

[0011] Furthermore, the surface roughness of the hydrophobic coating is smaller than the surface roughness of the lower oil channel.

[0012] Furthermore, the air return passage and the oil lower passage are arranged in the same part to simplify the structure.

[0013] Furthermore, the air return channel is connected to the oil lower channel, and is connected to the atmosphere through the oil lower channel.

[0014] Furthermore, the oil inlet hole is arranged on one side surface of the bracket, and the air return channel is arranged on the other side surface of the bracket.

[0015] Furthermore, the electronic atomization device also includes a heating component and an oil guide component. The bracket is provided with an installation cavity connected to the oil inlet hole. The oil guide component is installed in the installation cavity and opposite to the oil inlet hole. The heating component is installed on the side of the oil guide component away from the oil inlet hole.

[0016] Furthermore, the bracket has a connecting channel, one end of the connecting channel is connected to the installation cavity, and the other end of the return air channel is connected to an end of the return air channel away from the oil storage tank.

[0017] The electronic atomization device of the embodiment of the present application has at least the following beneficial effects: by providing a hydrophobic coating in the return air channel, the return air channel is made hydrophobic. Since the size of the return air channel of the electronic atomization device is usually small, under the hydrophobic effect of the return air channel, it is difficult for the atomized liquid to directly enter the return air channel, thereby reducing the probability of the atomized liquid leaking from the return air channel. At the same time, compared with the return air structure provided with a one-way valve or a maze structure, the return air channel in the present application is not provided with a one-way valve or a maze structure, but by providing a hydrophobic coating on the surface of the return air channel, it can not only effectively solve the problem of the atomized liquid leaking from the return air channel, but also reduce the return air pressure, which is conducive to smooth oil discharge during suction, and overcomes the problem of dry or burnt taste caused by providing a one-way valve or a maze structure in the return air structure, which is beneficial to improving the user experience of the electronic atomization device; the contact angle between the atomized liquid and the oil discharge channel is less than 90°, and it has good wettability to the liquid, and the liquid flows along the lower oil discharge channel. The oil channel surface seeps, the atomized liquid flows smoothly and is easy to pass through the oil lowering channel, which helps to accelerate the oil lowering speed of the atomized liquid and reduce the risk of dry burning caused by insufficient oil lowering; the contact angle between the hydrophobic coating and the atomized liquid is greater than 90° and less than 180°, and the wetting performance of the liquid is poor. The atomized liquid forms liquid droplets on the hydrophobic coating that are difficult to enter the return air channel, and the liquid droplets are difficult to diffuse and seep around the surface of the return air channel. The liquid droplets in the return air channel flow slowly or even stagnate, so that the atomized liquid stored in the oil storage tank is difficult to enter the return air channel, reducing the risk of return air leakage.

[0018] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present application is further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1 Schematic diagram of the shape of the droplet at different contact angles;

[0021] Figure 2 A schematic diagram of the contact angle between a liquid droplet and an air return channel in one embodiment of the electronic atomization device of the present application;

[0022] Figure 3 This is a schematic diagram of an explosion of an electronic atomization device according to an embodiment of the present application;

[0023] Figure 4 It is a cross-sectional schematic diagram of an electronic atomization device according to an embodiment of the present application;

[0024] Figure 5 Another cross-sectional schematic diagram of the electronic atomization device according to an embodiment of the present application;

[0025] Figure 6 for Figure 5A magnified schematic diagram of part A;

[0026] Figure 7 Another cross-sectional schematic diagram of the electronic atomization device according to an embodiment of the present application;

[0027] Figure 8 It is a front view schematic diagram of a bracket in the electronic atomization device of an embodiment of the present application;

[0028] Fig. 9 for Figure 8 A right side schematic diagram of the bracket in FIG.

[0029] Fig.10 for Figure 8 A rear view schematic diagram of the bracket in FIG.

[0030] Fig.11 for Figure 8 Schematic diagram of a top view of the bracket.

[0031] Reference numerals:

[0032] 100, housing; 110, oil storage tank; 120, atomizing airway;

[0033] 200, bracket; 210, lower oil channel; 220, oil inlet hole; 230, return air channel; 231, first return air groove; 232, second return air groove; 233, third return air groove; 234, fourth return air groove; 240, flow guide component; 250, sleeve part; 261, connecting channel; 262, connecting cavity;

[0034] 300, a first sealing member;

[0035] 400, oil guide parts;

[0036] 500, second sealing member;

[0037] 600, heating components;

[0038] 700. Power supply component. DETAILED DESCRIPTION

[0039] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0040] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0041] In the description of this application, "several" means more than one, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0042] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0043] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0044] The size of the return air structure of the electronic atomization device is usually small. In a short-term static state, it is difficult for the atomized liquid to directly enter the return air groove of the return air structure due to the small surface adsorption force. However, in long-term storage or high and low temperature negative pressure environments, the return air structure has three phases of solid, liquid and gas. Under the action of capillary force, the atomized liquid in the liquid storage tank will slowly enter the return air structure, eventually causing leakage.

[0045] In view of this, an embodiment of the present application proposes an electronic atomization device to effectively solve the problem of atomized liquid leaking from the return air channel 230 .

[0046] The present application embodiment discloses an electronic atomization device, such as Figures 1 to 7As shown, the electronic atomization device has an oil storage tank 110, and the oil storage tank 110 is used to store atomized liquid. The electronic atomization device includes a housing 100 and a bracket 200 installed in the housing 100, and the bracket 200 is provided with a lower oil channel 210 and a return air channel 230, the lower oil channel 210 is connected to the oil storage tank 110, one end of the return air channel 230 is connected to the oil storage tank 110, and the other end of the return air channel 230 is connected to the atmosphere. Among them, the contact angle between the atomized liquid and the lower oil channel 210 is less than 90°, so that the atomized liquid is easy to pass through the lower oil channel 210, that is, the lower oil channel 210 is hydrophilic; the contact angle between the hydrophobic coating and the atomized liquid is greater than 90° and less than 180°, so that the atomized liquid forms a liquid droplet on the hydrophobic coating that is difficult to enter the return air channel 230. That is to say, by providing a hydrophobic coating on the surface of the return air channel 230, the return air channel 230 is made hydrophobic.

[0047] In some embodiments of the present application, the bracket 200 is provided with an oil inlet hole 220 , and one end of the lower oil channel 210 away from the oil storage tank 110 is connected to the oil inlet hole 220 .

[0048] In the embodiment of the present application, the electronic atomization device also includes a heating component 600 and an oil guide component 400. The oil guide component 400 is arranged at the outlet of the oil inlet hole 220. The heating component 600 is arranged on the side of the oil guide component 400 away from the oil inlet hole 220. The heating component 600 is used to heat the atomized liquid guided by the oil guide component 400 and atomize it. During suction, the atomized liquid in the oil storage tank 110 flows to the oil inlet hole 220 through the lower oil channel 210, and flows to the oil guide component 400 through the oil inlet hole 220. The oil guide component 400 transports the atomized liquid to the heating component 600 arranged on the other side of the oil guide component 400 for heating and atomization to generate an aerosol. The electronic atomization device has an atomization airway 120, and the aerosol generated by the heating component 600 heating and atomization can flow along the atomization airway 120 to the suction nozzle of the electronic atomization device for the user to inhale. In practical applications, the oil guide component 400 can specifically be but not limited to oil guide cotton, microporous ceramics, etc.

[0049] In the electronic atomization device of the embodiment of the present application, a hydrophobic coating is provided in the return air channel 230, so that the return air channel 230 has hydrophobicity. Since the size of the return air channel 230 of the electronic atomization device is usually small, under the hydrophobic effect of the return air channel 230, it is difficult for the atomized liquid to directly enter the return air channel 230, thereby reducing the probability of the atomized liquid leaking from the return air channel 230. At the same time, compared with the return air structure provided with a one-way valve or a maze structure, the return air channel 230 in the present application is not provided with a one-way valve or a maze structure, but by providing a hydrophobic coating on the surface of the return air channel 230, the problem of the atomized liquid leaking from the return air channel 230 is effectively solved, and the return air pressure can also be reduced, which is helpful for smooth oil discharge during suction, thereby overcoming the problem of dry or burnt taste caused by providing a one-way valve or a maze structure in the return air structure, which is beneficial to improving the user experience of the electronic atomization device.

[0050] It is worth understanding that the angle θ formed by the tangent line of the droplet surface and the contact surface of the material is called the contact angle. The angle θ is between 0° and 180°. The degree of wetting can be estimated by the size of the angle θ. The smaller the angle θ, the better the wettability. If θ = 0°, the material is completely wetted; θ < 90°, it means that the contact surface of the material is hydrophilic; θ > 90°, it means that the surface of the material is hydrophobic; when θ = 180°, it is completely non-wetting. See Figure 1 As shown, the contact angles between the droplet and the contact surface are different, and the shape of the liquid on the contact surface is also different. When the droplet is in the shape of a liquid bead, the minimum size of the channel for the droplet to pass through is larger, that is, when the droplet is in the shape of a liquid bead, it is more difficult for the droplet to pass through the narrow channel. At this time, the hydrophobic performance of the channel is good. Figure 2 The contact angle between the atomized liquid and the lower oil channel 210 is less than 90°, and the liquid has good wettability. The liquid seeps along the surface of the lower oil channel 210, and the atomized liquid flows smoothly and is easy to pass through the lower oil channel 210, which helps to accelerate the oiling speed of the atomized liquid and reduce the risk of dry burning caused by insufficient oiling; the contact angle between the hydrophobic coating and the atomized liquid is greater than 90° and less than 180°, and the wettability of the liquid is poor. The atomized liquid forms liquid droplets on the hydrophobic coating that are difficult to enter the return air channel 230, and the liquid droplets are difficult to diffuse and seep around the surface of the return air channel 230. The liquid droplets in the return air channel 230 flow slowly, or even stagnate, making it difficult for the atomized liquid stored in the oil storage tank 110 to enter the return air channel 230, reducing the risk of return air leakage.

[0051] In some embodiments of the present application, see Figures 1 to 3 As shown, the electronic atomization device also includes a heating component 600 and an oil guide component 400. The bracket 200 is provided with a mounting cavity connected to the oil inlet hole 220. The oil guide component 400 is installed in the mounting cavity and directly opposite to the oil inlet hole 220. The heating component 600 is installed on the side of the oil guide component 400 away from the oil inlet hole 220.

[0052] In this embodiment, see Figure 1 As shown, the electronic atomization device also includes a power supply component 700, which is electrically connected to the heating component 600 to provide electrical energy for the heating component 600. Further, the electronic atomization device also includes a second sealing member 500, the bracket 200 has an airway connection port, and the second sealing member 500 is arranged in the airway connection port to improve its connection tightness. In practical applications, the second sealing member 500 can be a member made of silicone material.

[0053] In some embodiments of the present application, the hydrophobic coating includes SiO2 nanoparticles and fluorinated acrylate polymers, and the mass ratio of SiO2 nanoparticles to fluorinated acrylate polymers is n:1, n>1.2. Specifically, the interaction between liquid molecules and the surfaces of different solid materials is different. The angle θ formed by the tangent of the droplet surface and the contact surface of the material is called the contact angle. The angle θ is between 0° and 180°, and the degree of wetting can be estimated by the size of the angle θ. The smaller the angle θ, the better the wettability. If θ=0°, the material is completely wetted; θ<90°, it means that the contact surface of the material is hydrophilic; θ>90°, it means that the surface of the material is hydrophobic; when θ=180°, it is completely non-wetting. The contact angle between the hydrophobic coating and the liquid mainly varies with the content of SiO2 nanoparticles. When the mass ratio of SiO2 nanoparticles to fluorinated acrylate polymer (FPA) is greater than 1.2, the surface microstructure of the hydrophobic coating undergoes a sudden change, making the coating surface show super-hydrophobic properties, and the hydrophobic coating has hydrophobicity even if the contact angle between the hydrophobic coating and the liquid is greater than 90°. Thus, it is possible to reduce or even prevent the atomized liquid from entering the return air channel 230, thereby reducing the probability of the atomized liquid leaking from the return air channel 230.

[0054] It should be noted that in the embodiments of the present application, FPA refers to a fluorinated acrylate polymer.

[0055] In some embodiments of the present application, the mass ratio of SiO2 nanoparticles to fluorinated acrylate polymer (FPA) is 1.4. At this time, the surface of the hydrophobic coating forms nanoscale protrusions and holes on the basis of submicron-scale undulations, and the contact angle between the surface of the hydrophobic coating and water suddenly increases to 155°. The hydrophobic coating exhibits super-hydrophobic properties, which can further reduce the atomized liquid from entering the return air channel 230.

[0056] In some other embodiments of the present application, the mass ratio of SiO2 nanoparticles to fluorinated acrylate polymer (FPA) can be selected to be 1.3, 1.5, 1.6, 1.7, etc., but is not limited thereto.

[0057] In some embodiments of the present application, a coating is also provided in the lower oil channel 210, and the coating includes SiO2 nanoparticles and fluorinated acrylate polymers, and the mass ratio of SiO2 nanoparticles to fluorinated acrylate polymers is m:1, and m is less than 1.2. Specifically, the interaction between liquid molecules and the surfaces of different solid materials is different. The angle θ formed by the tangent of the droplet surface and the contact surface of the material is called the contact angle. The angle θ is between 0° and 180°, and the degree of wetting can be estimated by the size of the angle θ. The smaller the angle θ, the better the wettability. If θ=0°, the material is completely wetted; if θ<90°, it means that the contact surface of the material is hydrophilic; if θ>90°, it means that the surface of the material is hydrophobic; when θ=180°, it is completely non-wetting. The contact angle between the coating and the liquid mainly changes with the content of SiO2 nanoparticles. When the mass ratio of SiO2 nanoparticles to fluorinated acrylate polymer (FPA) is less than 1.2, the contact angle between the coating and the liquid is less than 90°, and the coating has good wettability to the liquid. The liquid seeps along the surface of the oil lowering channel 210, and the atomized liquid flows smoothly and easily passes through the oil lowering channel 210, which helps to accelerate the oil lowering speed of the atomized liquid and reduce the risk of dry burning caused by insufficient oil lowering.

[0058] In some embodiments of the present application, the surface roughness of the hydrophobic coating is less than the surface roughness of the lower oil channel 210. Specifically, the surface roughness of the hydrophobic coating will affect the contact angle of the droplet on the surface of the hydrophobic coating. The higher the roughness, the larger the contact area and the smaller the contact angle. By making the surface roughness of the hydrophobic coating less than the surface roughness of the lower oil channel 210, the lower oil channel 210 forms an attraction for the atomized liquid, and the return air channel 230 forms a repulsive force for the atomized liquid, which is conducive to forming a trend of the atomized liquid flowing from one side of the return air channel 230 to the other side of the lower oil channel 210, which can facilitate the atomized liquid to enter the lower oil channel 210, and also help to prevent the atomized liquid from entering the return air channel 230.

[0059] In some embodiments of the present application, the air return passage 230 and the oil lower passage 210 are provided in the same part, which helps to simplify the structure.

[0060] In some embodiments of the present application, the return air channel 230 is connected to the lower oil channel 210, and is connected to the atmosphere through the lower oil channel 210. Specifically, the return air channel 230 is connected to the lower oil channel 210, and extends from a side of the lower oil channel 210, and then is connected to the atmosphere through the lower oil channel 210. It is worth understanding that the lower oil channel 210 is connected to the atomization chamber of the electronic atomization device, and the atomization chamber is connected to the atmosphere, so that the return air channel 230 can be connected to the atmosphere through the lower oil channel 210.

[0061] In some embodiments of the present application, see Figures 2 to 8As shown, the electronic atomization device also includes an oil cup and a first seal 300, the first seal 300 is at least partially sleeved on the bracket 200, and the outer periphery of the first seal 300 is sealed and connected to the inner wall of the oil cup, and the bracket 200 is provided with a first return air groove 231 and a second return air groove 232 intersecting with the first return air groove 231 at one end of the oil storage tank 110, and the inner wall of the first seal 300 and the first return air groove 231 and the second return air groove 232 define a return air channel 230. Specifically, the bracket has a sleeve part 250 for connecting with the first seal 300, and the first seal 300 is connected to the sleeve part 250. Among them, the first return air groove 231 extends horizontally, and the second return air groove 232 extends longitudinally. In other words, the air inlet of the return air channel 230 is arranged horizontally, which prevents the atomized liquid in the oil storage tank 110 from directly entering the return air channel 230, which is conducive to reducing the probability of leakage of the atomized liquid from the return air channel 230. In practical applications, the first sealing member 300 may be a member made of silicone material.

[0062] It should be noted that the aforementioned horizontal refers to Figure 4 The X direction in the vertical direction refers to Figure 4 in the Y direction.

[0063] In some embodiments of this application, please continue to refer to Figure 4 As shown, the bracket 200 is also provided with a third air return groove 233 and a fourth air return groove 234, one end of the third air return groove 233 is connected to the second air return groove 232, and the other end of the third air return groove 233 extends horizontally and intersects with one end of the fourth air return groove 234. If the atomized liquid leaks from the air return channel 230, the leaked atomized liquid needs to overcome the air resistance of the air return channel 230 after entering the air return channel 230 before it can flow to the other end of the air return channel 230. As can be seen from the figure, the air return channel 230 is not a straight channel, which increases the difficulty of the atomized liquid passing through the air return channel 230, and can further hinder the atomized liquid in the oil storage tank 110 from entering the air return channel 230, thereby reducing the probability of the atomized liquid leaking from the air return channel 230.

[0064] In some embodiments of the present application, the width of the return air channel 230 is 0.2±0.03 mm, and the height of the return air channel 230 is 0.2±0.03 mm. The smaller size of the return air channel 230 can reduce the probability of leakage of the atomized liquid from the return air channel 230 in a static state. After the hydrophobic coating is provided in the return air channel 230, the return air channel 230 has hydrophobicity, and the atomized liquid at the return air channel 230 will form liquid droplets. The difficulty of the liquid droplet-shaped atomized liquid entering the smaller return air channel 230 increases, which can hinder the atomized liquid from entering the return air channel 230, thereby reducing the probability of leakage of the atomized liquid from the return air channel 230.

[0065] It is worth understanding that the cross-sectional profile of the return air channel 230 of this embodiment is a rectangle, and the two adjacent sides of the rectangle are respectively the width and height of the return air channel 230. In other embodiments, the cross-sectional profile of the return air channel 230 may also be circular, elliptical or other shapes, which are not limited here.

[0066] As one of the implementation methods, Figure 8 and Fig. 9 , the width range of the first air return groove 231 is 0.2±0.03mm, and the height range is 0.2±0.03mm. The first seal 300 is sleeved on the outer periphery of the bracket 200, and the inner wall of the first seal 300 and the wall surfaces of the first air return groove 231 and the second air return groove 232 surround the air return channel 230. In this embodiment, the air return channel 230 is defined by the bracket 200 and the first seal 300, and the first air return groove 231 and the second air return groove 232 are grooves on the end face or outer periphery of the bracket 200, which can be obtained by milling and other methods, and the process is simple.

[0067] In some embodiments of the present application, the surface of the oil inlet 220 is hydrophilic, which facilitates the atomized liquid to flow to one side of the oil inlet 220 and to flow to the oil guide component 400 at the other end of the oil inlet 220.

[0068] As one implementation manner, the bracket 200 is made of plastic material by injection molding, and the surface of the bracket 200 made of plastic material is hydrophilic.

[0069] As one implementation manner, a hydrophilic coating is provided on the surface of the oil inlet hole 220 to increase the hydrophilicity of the surface of the oil inlet hole 220 .

[0070] In some embodiments of the present application, see Figure 5 and Figure 6 As shown, the oil inlet hole 220 is arranged on one side of the bracket 200, and the air return channel 230 is arranged on the other side of the bracket 200. Specifically, the oil inlet hole 220 and the air return channel 230 are respectively arranged on two opposite sides of the bracket 200, which can make the atomized liquid flow more smoothly and also help to reduce the return air pressure of the air return channel 230.

[0071] In some embodiments of the present application, see Figure 5 and Figure 6 As shown, a guide component 240 is further provided at a position of the bracket 200 close to the oil inlet hole 220 , and the guide component 240 can provide guidance for the atomized liquid to flow toward the oil inlet hole 220 .

[0072] In some embodiments of the present application, see Figure 8As shown, the bracket 200 has a connecting channel 261, one end of which is connected to the installation cavity, and the other end of which is connected to the end of the return air channel 230 away from the oil storage tank 110. In other words, the connecting channel 261 enables the return air channel 230 to be connected to the oil storage tank 110 and the installing cavity. The installing cavity is connected to the oil inlet hole 220, so that the pressure in the oil storage tank 110 can be maintained substantially equal to the pressure at the oil inlet hole 220. Based on this, the atomized liquid in the oil storage tank 110 can flow out of the oil inlet hole 220 smoothly, and the situation in which the negative pressure of the return air increases and affects the return air effect is also reduced.

[0073] Specifically in this embodiment, see Figure 8 As shown, a connecting cavity 262 is provided between the return air channel 230 and the connecting channel 261 . The connecting cavity 262 has a relatively large space, which is conducive to maintaining the stability of the return air pressure.

[0074] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. An electronic atomization device having an oil storage tank for storing atomized liquid, characterized in that: The electronic atomization device includes a shell and a bracket installed in the shell, the bracket is provided with a lower oil channel and a return air channel, the lower oil channel is connected to the oil storage tank, one end of the return air channel is connected to the oil storage tank, and the other end of the return air channel is used to connect to the atmosphere; the surface of the return air channel is provided with a hydrophobic coating, the contact angle of the atomized liquid with the lower oil channel is less than 90°, and the contact angle of the atomized liquid with the hydrophobic coating is greater than 90° and less than 180°, so that the atomized liquid is in the form of liquid droplets on the hydrophobic coating.

2. The electronic atomization device according to claim 1, characterized in that: The hydrophobic coating comprises SiO2 nanoparticles and fluorine-containing acrylate polymers, and the mass ratio of the SiO2 nanoparticles to the fluorine-containing acrylate polymer is n:1, and n>1.

2.

3. The electronic atomization device according to claim 2, characterized in that: n＝1.4。 4. The electronic atomization device according to any one of claims 1 to 3, characterized in that: The electronic atomization device also includes a first seal, which is at least partially mounted on the bracket. The bracket is provided with a first return air groove and a second return air groove intersecting with the first return air groove at one end close to the oil storage tank. The inner wall of the first seal and the first return air groove and the second return air groove define the return air channel.

5. The electronic atomization device according to claim 4, characterized in that: The bracket is also provided with a third air return groove and a fourth air return groove, one end of the third air return groove is connected to the second air return groove, and the other end of the third air return groove extends horizontally and intersects with one end of the fourth air return groove.

6. The electronic atomization device according to claim 4, characterized in that: The width of the air return channel is 0.2±0.03 mm, and the height of the air return channel is 0.2±0.03 mm.

7. The electronic atomization device according to claim 1, characterized in that: The surface roughness of the hydrophobic coating is smaller than the surface roughness of the lower oil channel.

8. The electronic atomization device according to claim 1, characterized in that: The air return passage and the oil lower passage are arranged on the same part.

9. The electronic atomization device according to claim 1, characterized in that: The air return passage is connected to the oil lower passage, and is connected to the atmosphere through the oil lower passage.

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