A liquid store and aerosol-generating device

Abstract

The embodiment of the application discloses a liquid storage and an aerosol generating device. The liquid storage comprises a shell and a first coating and a second coating arranged on the shell. The shell comprises a containing cavity and an air channel, the first coating is uniformly arranged on the shell, and the second coating is uniformly arranged on the first coating on the inner wall of the containing cavity. The first coating and the second coating effectively block the release of harmful substances to the human body during the heating process of the shell, and make the overall structure achieve the effects of oil and water repellency, high and low temperature resistance, corrosion resistance and the like, thereby improving the use experience of the liquid storage and improving the market competitiveness of the product.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic products, in particular to a liquid storage and an aerosol generating device. BACKGROUND

[0002] An electronic cigarette is an electronic product that heats and atomizes a volatile solution to generate aerosol for a user to inhale. In recent years, major manufacturers have begun to produce various electronic cigarette products. Generally, an electronic cigarette product includes a housing, an oil storage chamber, an atomization chamber, a heating assembly, an air inlet, an air flow channel, an air outlet, a power supply device, a sensing device, and a control device. The oil storage chamber is used to store a volatile solution, and the heating assembly is used to heat and atomize the volatile solution to generate aerosol. The air inlet and the atomization chamber are in communication with each other, and air is provided to the heating assembly when a user inhales. The aerosol generated by the heating assembly is first generated in the atomization chamber and then inhaled by the user through the air flow channel and the air outlet. The power supply device provides power required by the heating assembly, and the housing covers the above-mentioned components.

[0003] However, the housings of existing electronic cigarettes are mostly made of PCTG [Poly(1,4-Cyclohexylene Dimethylene Terephthalate Glycol)], which is a high-transparency copolyester plastic with good toughness and impact strength, excellent low-temperature toughness, high tear resistance, and good processing performance. PCTG does not contain BPA (Bisphenol A), and even at a high temperature of 120℃, no harmful substances are released. However, the shortage of PCTG raw materials and other factors have led to a continuous rise in the price of PCTG, resulting in a shortage of PCTG. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a liquid storage and an aerosol generating device. By uniformly arranging a first coating on the housing of the liquid storage and partially uniformly arranging a second coating, the release of bisphenol A from the housing made of non-PCTG material after being heated is blocked, thereby ensuring the health of the user. The arrangement of the first coating and the second coating can also improve the use performance of the overall structure while reducing the cost of the housing.

[0005] In a first aspect, an embodiment of the present application provides a liquid storage for an aerosol generating device, the liquid storage comprising:

[0006] a housing comprising a containing cavity containing liquid and an air passage communicating with the containing cavity and the outside world;

[0007] wherein the housing is uniformly provided with a first coating, the first coating is a high molecular copolymer, and the first coating on the inner wall of the containing cavity is uniformly provided with a second coating having a blocking effect.

[0008] Further, the first coating layer is an acrylate copolymer.

[0009] Further, the first coating layer is formed by at least one of polyacrylate, polyurethane, epoxy resin and silicone resin.

[0010] Further, the second coating layer is a high-temperature resistant and corrosion resistant material.

[0011] Further, the second coating layer is a parylene film layer.

[0012] Further, the second coating layer contains one of parylene, polychloroparaxylylene, polydichloroparaxylylene, polytetrafluoroparaxylylene and polychloroparadifluorobenzene.

[0013] Further, the shell comprises one of polyethylene, polycarbonate and polyacrylonitrile.

[0014] Further, the shell is injection molded.

[0015] Further, the first coating layer and / or the second coating layer is provided by plasma enhanced chemical deposition.

[0016] Further, the film layer of the first coating layer has a thickness of 10-200 nm.

[0017] Further, the film layer of the second coating layer has a thickness of 10-200 nm.

[0018] Further, the second coating layer is uniformly provided on the first coating layer of the shell.

[0019] Further, the shell further comprises a mouthpiece assembly sleeved outside the airway, the mouthpiece assembly and the accommodating cavity are mutually penetrable, and the cross-sectional area of the mouthpiece assembly decreases with the increase of the distance between the mouthpiece assembly and the accommodating cavity.

[0020] Further, the cross section of the mouthpiece assembly is elliptical, the airway and the end of the mouthpiece assembly away from the accommodating cavity are connected to each other, the free section of the airway is arranged at the center of the mouthpiece assembly, and the free section of the airway is spaced apart from the side wall of the mouthpiece assembly by a distance.

[0021] Further, the second coating layer is uniformly provided on the first coating layer of the mouthpiece assembly.

[0022] In a second aspect, an embodiment of the present application provides an aerosol generating device, which comprises:

[0023] The liquid storage as described in the first aspect;

[0024] The atomization device is arranged inside the accommodating cavity of the liquid storage.

[0025] Further, the side wall of the accommodating cavity has a mounting groove matched with the atomization device.

[0026] Further, the atomization device comprises an atomization core and a connecting cover group connecting the atomization core and the liquid storage.

[0027] Further, the aerosol generating device further comprises a power supply device.

[0028] Further, the atomization device further comprises a lower cover fixing the atomization core and a terminal connecting the power supply device and the atomization core.

[0029] The present application provides a liquid storage and an aerosol generating device. The liquid storage comprises a shell and a first coating and a second coating arranged on the shell. The shell comprises an accommodating cavity and an air passage, and the first coating is uniformly arranged on the shell, and the second coating is uniformly arranged on the first coating on the inner wall of the accommodating cavity. The first coating and the second coating effectively block the release of harmful substances to the human body during the heating process of the shell, and improve the use experience of the liquid storage. BRIEF DESCRIPTION OF DRAWINGS

[0030] The above and other objects, features and advantages of the present application will become more apparent from the following description of embodiments of the present application taken in conjunction with the accompanying drawings, in which:

[0031] Figure 1 is a perspective view of the liquid storage provided by the embodiment of the present application;

[0032] Figure 2 is a sectional view of the liquid storage provided by the embodiment of the present application;

[0033] Figure 3 is a bottom view of the liquid storage provided by the embodiment of the present application;

[0034] Figure 4 is a partial sectional view of the liquid storage provided by the first embodiment of the present application;

[0035] Figure 5 is a partial sectional view of the liquid storage provided by the second embodiment of the present application;

[0036] Figure 6 is a perspective view of the aerosol generating device provided by the embodiment of the present application;

[0037] Figure 7 is a sectional view of the aerosol generating device provided by the embodiment of the present application;

[0038] Figure 8 is an exploded view of the aerosol generating device provided by the embodiment of the present application.

[0039] Explanation of reference signs:

[0040] 1 - housing; 11 - accommodating cavity; 111 - mounting groove; 12 - air passage; 13 - mouthpiece assembly;

[0041] 2 - first coating layer;

[0042] 3 - second coating layer;

[0043] 4 - atomizing device; 41 - atomizing core; 42 - connecting cover set; 421 - first upper cover; 422 - second upper cover; 423 - third upper cover; 424 - convex end; 43 - lower cover; 44 - terminal; 45 - oil absorbing cotton;

[0044] 61 - top leak-proof plug; 62 - bottom leak-proof plug; 63 - sealing ring. DETAILED DESCRIPTION

[0045] The present application is described in detail below based on examples, but the present application is not limited to only these examples. In the following detailed description of the present application, some specific details are described in detail. The present application can also be fully understood without the description of these details by those skilled in the art. In order to avoid confusion of the essence of the present application, well-known methods, processes, procedures, elements and circuits are not described in detail.

[0046] In addition, those of ordinary skill in the art will understand that the drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale.

[0047] Unless the context clearly requires otherwise, throughout the description, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the sense of "including, but not limited to".

[0048] In the description of the present application, it should be understood that the terms "first", "second", etc. are used only for the purpose of description and should not be construed as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0049] Unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be interpreted broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise expressly specified. For those of ordinary skill in the art, the specific meaning of the above terms in the invention can be understood according to the specific circumstances.

[0050] The technical solutions of the present application will be further described below in conjunction with the drawings and through specific embodiments.

[0051] Figure 1 is a schematic diagram of a liquid storage provided by an embodiment of the present application, which is part of an aerosol generating device and used for containing liquid to be dispersed. The liquid storage is composed of a shell 1, which includes a containing cavity 11 for containing liquid and an air passage 12 for communicating the containing cavity 11 with the outside. In this embodiment, the aerosol generating device is an electronic cigarette, the liquid storage is a cartridge in the electronic cigarette, and the liquid is e-liquid. The shell 1 is uniformly provided with a first coating layer 2 made of a high-molecular copolymer material, and the first coating layer 2 on the inner wall of the containing cavity 11 is uniformly provided with a second coating layer 3 having a barrier effect. The first coating layer 2 and the second coating layer 3 effectively block the release of bisphenol A, which is harmful to the human body, during the heating process of the shell 1, and improve the use experience of the liquid storage.

[0052] Further, the cross section of the shell 1 is elliptical, thereby facilitating the user to hold and suck into the mouth. Moreover, an ellipse of the same area has a greater circumference than a circle, so that the shell 1 with an elliptical cross section has a greater heat dissipation area when having the same flow as a structure with a circular cross section, can effectively dissipate the heated smoke, and improve the user's experience.

[0053] Figure 2 is a sectional view of the liquid storage provided by an embodiment of the present application. The shell 1 further includes a mouthpiece assembly 13 sleeved on the outside of the air passage 12, and the air passage 12 and the mouthpiece assembly 13 are connected to each other at the end away from the containing cavity 11 to form an integrated structure. The seamless integrated design of the mouthpiece assembly 13 and the end of the air passage 12 extending into the user's oral cavity effectively avoids the insufficient coverage of the coating at the joint, which causes the overflow of harmful substances, and the relatively round shape improves the user's use experience. The user sucks the dispersed e-liquid generated in the containing cavity 11 through the air passage 12 by passing or sucking the mouthpiece assembly 13 during use.

[0054] Figure 3 is a bottom view of the liquid storage provided by an embodiment of the present application. The free section of the air passage 12 is arranged at the center position of the mouthpiece assembly 13 and the containing cavity 11, and the free section of the air passage 12 is spaced apart from the side walls of the mouthpiece assembly 13 and the containing cavity 11. In this embodiment, the spacing between the opposite sides of the free section of the air passage 12 and the inner wall of the shell 1 is the same, thereby facilitating the arrangement of the coating inside the shell 1 and reducing the processing difficulty of the coating.

[0055] Further, the outer walls of the mouthpiece assembly 13 and the containing cavity 11 penetrate each other, and the cross sections of the mouthpiece assembly 13 and the containing cavity 11 are both elliptical. The cross-sectional area of the mouthpiece assembly 13 decreases with the increase of the distance between the mouthpiece assembly 13 and the containing cavity 11, in cooperation with the size of the user's oral cavity and the holding of the user, thereby facilitating the user to hold and suck into the mouth.

[0056] AsFigure 1 As shown, the connection between the mouthpiece assembly 13 and the accommodating cavity 11 has a stepped structure. The edge of the stepped structure is rounded, and the step is bent towards the accommodating cavity 11. That is, the point where the stepped structure intersects with the short half-axis end of the cross section of the shell 1 is closer to the accommodating cavity 11 than the point where the stepped structure intersects with the long half-axis end of the cross section of the shell 1.

[0057] In the embodiment, the shell 1 is integrally injection molded from one of polyethylene, polycarbonate and polyacrylonitrile. The polyethylene, polycarbonate and polyacrylonitrile have the same performance as PCTG or can obtain the same performance as PCTG through subsequent processing. In addition, the polyethylene, polycarbonate and polyacrylonitrile have abundant raw material sources and high cost performance.

[0058] When smoking and heating, the shell 1 releases residual bisphenol A and even produces new decomposition products as the temperature rises. Bisphenol A and decomposition products are harmful to human health and can seriously endanger the health of the smoking population. Therefore, in the embodiment, the first coating layer 2 is uniformly arranged on the shell 1 to prevent the bisphenol A and other harmful substances released by the shell 1 from overflowing. Since the heating device and the tobacco oil are both located inside the accommodating cavity 11, the second coating layer 3 having a barrier effect is uniformly arranged on the first coating layer 2 on the inner wall of the accommodating cavity 11, thereby further enhancing the wrapping of the coating layer on the inner wall of the accommodating cavity 11, improving the reliability of the coating layer and avoiding the leakage of harmful gas.

[0059] Further, the first coating layer 2 is a high molecular copolymer. In the embodiment, the first coating layer 2 is an acrylate copolymer. The first coating layer 2 is formed by polymerization of at least polyacrylate, polyurethane, epoxy resin and silicone resin. The acrylate copolymer has high polarity and complete saturation due to its molecular structure, so that the product has excellent oil resistance and high temperature resistance. Therefore, the first coating layer 2 will not be dissolved, swollen, cracked, deformed or physically degraded by oil, nor will it be damaged at high temperatures.

[0060] The first coating layer 2 is set by PECVD (Plasma Enhanced Chemical Vapor Deposition). This method uses plasma discharge to clean and activate the surface of the product, and provides energy for the chemical bond of the film material molecules, and promotes the polymerization reaction to continue. Then, in a vacuum environment, the plasma-activated product surface is chemically bonded to the monomer molecules, and the monomer molecules continuously polymerize and conformally grow to form a nanometer protective layer. The operation temperature of PECVD is low, which will not release bisphenol A from the shell 1 during the film forming process, and the film quality of PECVD is good, with fewer pinholes and less cracking, which can effectively ensure the reliability of the first coating layer 2. In this embodiment, the film thickness of the first coating layer 2 is 10-200 nm, and the film thickness of the first coating layer 2 at different positions on the shell 1 is the same or different. The first coating layer 2 of 10-200 nm can reduce the thickness as much as possible while ensuring the wrapping performance of the shell 1, so as not to bring inconvenience to the normal use of the original structure of the shell 1.

[0061] Since the accommodation cavity 11 accommodates tobacco tar, and the accommodation cavity 11 has a device related to heating tobacco tar, in order to further ensure the reliability of the liquid storage during use, the second coating layer 3 is a high-temperature-resistant and corrosion-resistant material. In this embodiment, the second coating layer 3 is a Parylene film layer. Parylene is a polymer of p-xylene, and is a general term for a series of high-molecular polymer materials, which was developed by the American Carbide Corporation in the 1960s. Each Parylene has excellent common properties such as water resistance, corrosion resistance, and insulation, as well as its own special properties.

[0062] In this embodiment, the second coating layer 3 is one of N-type Parylene coating (poly-p-xylene), C-type Parylene coating (poly-chloro-p-xylene), D-type Parylene coating (poly-p-dichloro-p-xylene), F-HT4-type Parylene coating (poly-tetrafluoro-p-xylene), and F-AF4-type Parylene coating (poly-chloro-p-difluorotoluene). Preferably, the C-type Parylene coating (poly-chloro-p-xylene) with faster deposition speed and higher film strength can be selected to ensure the strength of the second coating layer 3 while improving the preparation speed. Or the F-AF4-type Parylene coating (poly-chloro-p-difluorotoluene) with good thermal stability and UV resistance is selected to set a firm and durable second coating layer 3.

[0063] The coating process of the second coating layer 3 is a vacuum chemical vapor deposition process. The process is gasification-cracking-molecular level vapor deposition in sequence. The specific process is prior art and will not be described in detail here. In this embodiment, the film thickness of the second coating layer 3 is 10-200 nm, and the film thickness of the second coating layer 3 on the first coating layer 2 is the same or different. The second coating layer 3 of 10-200 nm can reduce the thickness as much as possible while ensuring the wrapping performance of the shell 1, so as not to bring inconvenience to the normal use of the original structure of the shell 1. The first coating layer 2 and the second coating layer 3 in this thickness range will not block the airway 12 even if they are stacked in the airway 12.

[0064] In this embodiment, the second coating layer 3 completely covers all positions of the inner wall of the accommodating cavity 11, thereby playing a good wrapping effect on the shell 1 and improving the reliability of the overall coating in this area. In some embodiments, the second coating layer 3 is only provided on the side wall of the heating element on the side wall of the accommodating cavity 11. In this arrangement, the second coating layer 3 wraps the most easily damaged position of the first coating layer 2 inside the accommodating cavity 11, and due to the reduction of the coating area, the cost can be effectively reduced.

[0065] The first coating layer 2 and the second coating layer 3 cooperate with each other to achieve the effects of oil and water repellency, high and low temperature resistance, corrosion resistance, etc. The second coating layer 3 is more consistent with the structure of the shell 1 than the first coating layer 2, and the overall structure of the second coating layer 3 has no dead angle, no pinhole, and uniform thickness. The second coating layer 3 provided on the first coating layer 2 can help the first coating layer 2 to conform to the structure of the shell 1, effectively compensate for the defects of the first coating layer 2, and improve the reliability of the overall coating. In addition, the shell 1 provided with the coating will not release harmful substances at a high temperature of 170°C, meet food hygiene, and have excellent flame retardancy and other advantages. The shell 1 and the coating cooperate with each other to form a high-performance environmentally friendly material. The advantages of the first coating layer 2 and the second coating layer 3 are shown in Table 1.

[0066] Table 1 Performance evaluation of the first coating layer and the second coating layer

[0067]

[0068] Figure 4 is a partial sectional view of a liquid storage device provided by Embodiment One of the present application, Figure 4is a sectional view of the accommodating cavity 11 part of the shell 1. Since the accommodating cavity 11 accommodates tobacco tar and needs to heat the tobacco tar, in order to ensure the reliability of the coating at the accommodating cavity 11, a second coating 3 is arranged on the first coating 2 inside the accommodating cavity 11, forming a redundant configuration. Even if the first coating 2 is damaged in use, the second coating 3 can block the released bisphenol A in the shell 1. The first coating 2 and the second coating 3 have a large contact angle, so that after the coating is arranged on the inner wall of the accommodating cavity 11, the inner wall surface has good oil and water repellency, and the tobacco tar and condensate are difficult to adhere to the inner wall of the accommodating cavity 11, greatly improving the user's smoking experience. In some embodiments, the second coating 3 is arranged on the first coating 2 on both the inside and outside of the accommodating cavity 11.

[0069] Figure 5 is a partial sectional view of the liquid storage provided by the second embodiment of the present application, Figure 5 is a partial sectional view of the mouthpiece assembly 13 of the shell 1. The inside and outside of the mouthpiece assembly 13 are provided with the first coating 2, and the first coating 2 and the second coating 3 can prevent bacterial growth. Since the outside of the mouthpiece assembly 13 is in contact with the user's oral cavity, arranging the coating at the mouthpiece assembly 13 can greatly protect the user's health and safety. In order to balance the user's health and the cost of the product, the second embodiment of the present application only arranges the first coating 2 on the inside and outside of the mouthpiece assembly 13. In some embodiments, the second coating 3 is added to the first coating 2 on the inside and / or outside of the mouthpiece assembly 13, so as to prevent bacteria and dust from contaminating the mouthpiece assembly 13 and achieve biological compatibility, further protecting the user's health.

[0070] In the prior art, since the inner surface of the airway 12 formed by mold injection molding has low flatness and smoothness, the dispersion of the tobacco smoke has large resistance, is easy to adhere to the surface and is easy to cause condensate backflow. In the present embodiment, the first coating 2 is arranged on the airway 12, and the surface of the airway 12 provided with the first coating 2 has good oil and water repellency. Due to the first coating 2 at the airway 12, the surface tension of this position is increased, so that the tobacco tar can not adhere to the wall and will slide down along the inner wall of the tobacco tar, and the tobacco tar will not stay in the airway 12, ensuring the stability of the resistance and further improving the user's smoking experience. In some embodiments, the second coating 3 is added to the first coating 2 on the inside and / or outside of the airway 12, and the coating can lubricate the surface of the airway 12, avoid direct contact between the liquid atomization liquid and the airway 12 material, prevent the atomization liquid from contaminating the internal structure of the shell 1, and improve the reliability of the overall structure.

[0071] And, due to the loose microstructure of the shell 1 and the large surface area, the flavor in the tobacco tar is easy to penetrate or adsorb on the shell 1, thereby reducing the taste of the tobacco tar, causing the taste loss. After the first coating layer 2 and / or the second coating layer 3 are arranged on the shell 1, the shell 1 has inertness, so that the component contacting the tobacco tar or the chemical oil does not have obvious property change or functional loss, and the pure taste of the original tobacco tar is not damaged. Moreover, the coating layer can effectively avoid the cracking or oil leakage of the shell 1, thereby greatly reducing the production cost.

[0072] In some embodiments, the first coating layer 2 and the second coating layer 3 are arranged on the whole shell 1 uniformly, and the first coating layer 2 and the second coating layer 3 with dense structures are arranged on the surface of the whole shell 1 to protect the structure of the whole shell 1, so that the shell 1 is difficult to react with external substances. At the same time, the bisphenol A released by the shell 1 when heated can be blocked, thereby achieving excellent protection effect and greatly improving the market competitiveness of the product.

[0073] The embodiment of the present application also provides an aerosol generating device. The aerosol generating device has a wide range of uses, and can be filled with tobacco liquid (oil) or the like for smoking cessation and cigarette replacement, or filled with medicine for inhalation treatment according to the content. The aerosol generating device comprises a liquid storage and an atomization device 4 arranged inside a containing cavity 11 of the liquid storage.

[0074] Figure 6 It is a schematic diagram of the three-dimensional structure of the aerosol generating device provided by the embodiment of the present application. The top leak-proof plug 61 needs to be arranged away from the containing cavity 11 side of the mouthpiece assembly 13, and the first coating layer 2 can improve the sealing effect between the top leak-proof plug 61 and the mouthpiece assembly 13. The first coating layer 2 can also prevent the user from plugging and unplugging the top leak-proof plug 61 to cause friction damage to the mouthpiece assembly 13. The bottom leak-proof plug 62, the sealing ring 63 and other sealing elements need to be inserted into the containing cavity 11 away from the mouthpiece assembly 13 side, and the second coating layer 3 at the contact position of the containing cavity 11 and the sealing element can also improve the sealing effect between the side wall of the containing cavity 11 and the sealing element, thereby avoiding the complete sealing of the containing cavity 11 depending on the structural characteristics of the sealing element, and effectively avoiding the problem of liquid / oil leakage.

[0075] As shown in Figure 2 The side wall of the containing cavity 11 has a mounting groove 111 matched with the atomization device 4, and the first coating layer 2 and the second coating layer 3 are arranged in sequence at the mounting groove 111. The second coating layer 3 can also improve the abutting effect between the mounting groove 111 and the atomization device 4, improve the stability of the connection between the atomization device 4 and the containing cavity 11, and improve the reliability of the overall structure.

[0076] Figure 7is a cross-sectional view of an aerosol generating device provided by an embodiment of the present application. The atomization device 4 includes an atomization core 41 and a connecting cover set 42 connecting the atomization core 41 and the liquid storage. The connecting cover set 42 has a convex end 424 matching the mounting groove 111. The atomization core 41 can generate heat to disperse the tobacco tar or other liquid in the accommodation cavity 11 into aerosol.

[0077] Further, the aerosol generating device further includes a power supply device (not shown in the figure). The power supply device is arranged on the side of the accommodation cavity 11 away from the mouthpiece assembly 13, and is electrically connected to and supplies power to the atomization device 4. In some embodiments, the power supply device further includes a control circuit and a switch, and the user can control the working state of the atomization device 4 through the switch.

[0078] Further, the aerosol generating device further includes a lower cover 43 fixing the atomization core 41 and a terminal 44 connecting the power supply device and the atomization core 41. The lower cover 43 and the connecting cover set 42 are arranged on the opposite sides of the atomization core 41, and respectively apply support forces in opposite directions to the atomization core 41, so as to fix the atomization core 41.

[0079] Figure 8 is an exploded schematic view of the aerosol generating device provided by an embodiment of the present application. The connecting cover set 42 includes a first upper cover 421, a second upper cover 422 and a third upper cover 423 which are sequentially sleeved. The first upper cover 421 abuts against the accommodation cavity 11, and the third upper cover 423 wraps one end of the atomization core 41. In order to ensure the tightness of the combination of the first upper cover 421 and the third upper cover 423 with other structures, the first upper cover 421 and the third upper cover 423 are made of flexible materials with large friction coefficients, such as silica gel. The third upper cover 423 has thermal stability and will not be damaged by the atomization core 41 in the working state. The second upper cover 422 has a convex end 424 matching the mounting groove 111, and the mounting groove 111 and the convex end 424 are transitionally matched, so as to further ensure the stability of the connection between the connecting cover set 42 and the accommodation cavity 11.

[0080] The atomization core 41 is provided with an atomization groove on the side close to the mouthpiece assembly 13. The atomization core 41 heats the liquid in the atomization groove to generate aerosol. In order to facilitate the liquid to enter the inside of the atomization core 41, the connecting cover set 42 has a connecting hole communicating the atomization groove of the atomization core 41 and the accommodation cavity 11.

[0081] As Figure 8As shown, the lower cover 43 has oppositely arranged support ends, and the two support ends are respectively fixed to opposite sides of the atomization core 41. The lower cover 43 also has a terminal hole for accommodating the terminal 44, and the terminal 44 extends into the terminal hole and is connected to the atomization core 41. The atomization core 41 and the bottom of the lower cover 43 are also provided with an oil absorption cotton 45, and the oil absorption cotton 45 has a hole that matches the terminal hole. The oil absorption cotton 45 prevents liquid from extending into the lower cover 43 and contacting the terminal 44, thereby avoiding short circuit or other faults of the terminal 44 due to contact with the liquid. The lower cover 43 away from the mouthpiece assembly 13 is also provided with structures that match the bottom leak-proof plug 62 and the sealing ring 63, respectively. The lower cover 43, the bottom leak-proof plug 62 and the sealing ring 63 are matched with each other, further fixing the atomization core 41 and ensuring that the liquid in the accommodation cavity 11 will not leak.

[0082] The application provides a liquid storage and an aerosol generating device. The liquid storage comprises a shell and a first coating and a second coating arranged on the shell. The shell comprises an accommodation cavity and an air channel, and the first coating is uniformly arranged on the shell, and the second coating is uniformly arranged on the first coating on the inner wall of the accommodation cavity. The first coating and the second coating effectively block the release of harmful substances to the human body during the heating process of the shell, and make the overall structure achieve the effects of oil and water repellency, high and low temperature resistance, corrosion resistance and the like, improve the use experience of the liquid storage, and improve the market competitiveness of the product.

[0083] The above only describes the preferred embodiments of the application and is not intended to limit the application. For those skilled in the art, the application can be variously modified and changed. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the application shall be included in the protection scope of the application.

Claims

1. A liquid storage device for an aerosol generating apparatus, characterized in that, The liquid storage device includes: The housing (1) includes a liquid-containing cavity (11), an air passage (12) connecting the liquid-containing cavity (11) to the outside, and a suction nozzle assembly (13) sleeved on the outside of the air passage (12). The ends of the air passage (12) and the suction nozzle assembly (13) away from the liquid-containing cavity (11) are connected to each other. The free section of the air passage (12) is separated from the side wall of the suction nozzle assembly (13) and the side wall of the liquid-containing cavity (11) by a distance. The housing (1) is uniformly coated with a first coating (2), which is an acrylate copolymer. The first coating (2) is uniformly coated with a second coating (3) with a barrier function on the first coating (2) on the inner wall of the accommodating cavity (11).

2. The liquid storage device according to claim 1, characterized in that, The first coating (2) is formed by polymerization of at least polyacrylate, polyurethane, epoxy resin and silicone resin.

3. The liquid storage device according to claim 1, characterized in that, The second coating (3) is a high-temperature resistant and corrosion resistant material.

4. The liquid storage device according to claim 3, characterized in that, The second coating (3) is a pyrene film layer.

5. The liquid storage device according to claim 4, characterized in that, The second coating (3) contains one of parylene, polychloroparylene, pardichloroparylene, polytetrafluoroethylene, and polychlorodidifluorotoluene.

6. The liquid storage device according to claim 1, characterized in that, The shell (1) comprises one of the following materials: polyethylene, polycarbonate, and polyacrylonitrile.

7. The liquid storage device according to claim 1, characterized in that, The shell (1) is injection molded.

8. The liquid storage device according to claim 1, characterized in that, The first coating (2) and / or the second coating (3) are applied by plasma-enhanced chemical deposition.

9. The liquid storage device according to claim 1, characterized in that, The thickness of the first coating (2) is 10-200 nm.

10. The liquid storage device according to claim 1, characterized in that, The thickness of the second coating (3) is 10-200 nm.

11. The liquid storage device according to claim 1, characterized in that, A second coating (3) is uniformly disposed on the first coating (2) of the housing (1).

12. The liquid storage device according to claim 1, characterized in that, The suction nozzle assembly (13) communicates with the accommodating cavity (11), and the cross-sectional area of ​​the suction nozzle assembly (13) decreases as the distance between the suction nozzle assembly (13) and the accommodating cavity (11) increases.

13. The liquid storage device according to claim 12, characterized in that, The nozzle assembly (13) has an elliptical cross-section, and the free section of the air passage (12) is located at the center of the nozzle assembly (13).

14. The liquid storage device according to claim 13, characterized in that, A second coating (3) is uniformly disposed on the first coating (2) of the nozzle assembly (13).

15. An aerosol generating device, characterized in that, The aerosol generating device includes: Liquid storage device as described in any one of claims 1-14; The atomizing device (4) is disposed inside the accommodating cavity (11) of the liquid storage device.

16. The aerosol generating apparatus according to claim 15, characterized in that, The sidewall of the accommodating cavity (11) has a mounting groove (111) that mates with the atomizing device (4).

17. The aerosol generating apparatus according to claim 16, characterized in that, The atomizing device (4) includes an atomizing core (41) and a connecting cover assembly (42) connecting the atomizing core (41) and the liquid storage device. The connecting cover assembly (42) has a protruding end (424) that mates with the mounting groove (111).

18. The aerosol generating apparatus according to claim 17, characterized in that, The aerosol generating device also includes a power supply device.

19. The aerosol generating apparatus according to claim 18, characterized in that, The atomizing device (4) further includes a lower cover (43) for fixing the atomizing core (41) and a terminal (44) for connecting the power supply device to the atomizing core (41).

Images