Waterproof and breathable valve

Abstract

The utility model provides a waterproof and breathable valve relates to breathable valve technical field, waterproof and breathable valve, include: valve body, the through -hole of one axial through is opened in valve body, the through -hole is used for carrying out gas exchange, waterproof and breathable membrane, waterproof and breathable membrane covers the first end of through -hole, with the fixed assembly of valve body cooperation connection, through fixed assembly and valve body connection, fixed assembly will waterproof and breathable membrane fixed in the first end of through -hole, and set up breathable structure on fixed assembly, and breathable structure is used for guaranteeing waterproof and breathable membrane to breathe. The utility model scheme, through the through -hole, waterproof and breathable membrane and breathable structure, can guarantee waterproof and breathable membrane to play the role of balancing internal and external pressure, eliminate the pressure difference, and set up fixed assembly for fixing waterproof and breathable membrane outside waterproof and breathable membrane, guarantee waterproof and breathable membrane installation firmness, prevent waterproof and breathable membrane damage, increase the service life of waterproof and breathable valve.

Description

Technical Field

[0001] This utility model relates to the field of breathable valve technology, and in particular to a waterproof breathable valve. Background Technology

[0002] Waterproof breathable valves can be used in sensor cleaning systems, communication equipment, and automotive parts. They prevent dust, oil droplets, or other particles from entering the system and balance the internal and external air pressure of the equipment. Existing waterproof breathable valves typically consist of a valve body and a breathable membrane, with the membrane glued to the valve body. However, the breathable membrane in existing waterproof breathable valves is poorly installed or easily damaged, leading to valve failure and affecting the use of the equipment. Utility Model Content

[0003] This utility model provides a waterproof and breathable valve to solve the problems of poor robustness and easy damage of existing waterproof and breathable valves.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0005] In a first aspect, embodiments of this utility model provide a waterproof and breathable valve, comprising:

[0006] The valve body has an axially penetrating through hole for gas exchange.

[0007] A waterproof and breathable membrane, wherein the waterproof and breathable membrane covers the first end of the through hole;

[0008] A fixing component that is connected to the valve body is used to fix the waterproof and breathable membrane to the first end of the through hole. The fixing component is provided with a breathable structure to ensure that the waterproof and breathable membrane is breathable.

[0009] In some embodiments, a locking groove is formed on the outer wall surface of the valve body, the locking groove being used to adapt and connect with the edge of the valve hole of the liquid storage structure.

[0010] In some embodiments, a fixing groove is formed on the outer wall surface of the valve body, and the fixing component is provided with a fastener protruding towards the valve body;

[0011] The fastener is connected to the fixing groove, and the fixing component is connected to the valve body.

[0012] In some embodiments, at least two fixing holes are formed between the first end of the valve body and the first groove wall of the fixing groove, and the fastener includes at least two fixing teeth; the fastener is engaged with the first groove wall through the fixing holes by the fixing teeth, and the fastener is connected to the fixing groove.

[0013] And / or,

[0014] The fastener includes at least two fixing claws, which engage with the fixing groove, and the fastener is connected to the fixing groove.

[0015] In some embodiments, one end of the fixing tooth is provided with a barb structure, which engages with the wall of the first groove.

[0016] In some embodiments, the valve body is manufactured using a one-piece molding process.

[0017] In some embodiments, the waterproof and breathable valve further includes an adhesive component for attaching the waterproof and breathable membrane to the first end of the through-hole.

[0018] In some embodiments, the adhesive component is a ring structure;

[0019] or,

[0020] The adhesive component has a circular structure, and a vent hole is provided in the middle of the adhesive component.

[0021] In some embodiments, the fixing component includes a fixing bracket for fixing the waterproof and breathable membrane to a first end of the through hole, the fixing bracket having a shape including at least one of the following:

[0022] Cross shape;

[0023] T-shape;

[0024] I-shaped;

[0025] Y-shaped;

[0026] Cylindrical;

[0027] The first end face and the second end face of the cylindrical fixing bracket are hollow structures.

[0028] Alternatively, the first end face and the second end face of the cylindrical fixing bracket are of a mesh structure;

[0029] Alternatively, the first end face of the cylindrical fixing bracket is a hollow structure, and the outer peripheral surface of the cylindrical fixing bracket is a mesh structure;

[0030] Alternatively, the first end face of the cylindrical fixing bracket is a mesh structure, and the outer peripheral surface of the cylindrical fixing bracket is a mesh structure.

[0031] In some embodiments, the outer wall surface of the fixing component has at least one vent hole or at least one vent groove.

[0032] The beneficial effects of this utility model are:

[0033] The waterproof and breathable valve provided by this utility model includes a valve body, a waterproof and breathable membrane, and a fixing component. The valve body has an axially penetrating through-hole. The waterproof and breathable membrane covers the first end of the through-hole. The fixing component is connected to the valve body, fixing the waterproof and breathable membrane to the first end of the through-hole. The fixing component also has a breathable structure to ensure the waterproof and breathable membrane can breathe. Through the through-hole, the waterproof and breathable membrane, and the breathable structure, the waterproof and breathable membrane can balance internal and external pressures and eliminate pressure differences. The fixing component securely holds the waterproof and breathable membrane in place, ensuring its stability, preventing damage, and increasing the service life of the waterproof and breathable valve. Attached Figure Description

[0034] Figure 1 This is a schematic diagram showing the overall structure of the waterproof and breathable valve provided in this embodiment of the present invention.

[0035] Figure 2 This is a schematic diagram showing the structure of the valve body provided in an embodiment of the present invention;

[0036] Figure 3 This is a side view of the valve body provided in an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram showing the structure of the waterproof and breathable membrane provided in an embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram showing the structure of the fixing component provided in an embodiment of the present invention;

[0039] Figure 6 This is a side view of the fixing component provided in an embodiment of the present utility model;

[0040] Figure 7 This is a top view of the fixing component provided in an embodiment of the present utility model;

[0041] Figure 8 This diagram illustrates how the cross-shaped fixing bracket provided in this embodiment of the invention fixes the waterproof and breathable membrane.

[0042] Explanation of reference numerals in the attached figures:

[0043] 1-Valve body; 11-Through hole; 12-Engaging groove; 13-Fixing groove; 14-Fixing hole; 2-Waterproof and breathable membrane; 3-Fixing component; 31-Fixing tooth; 311-Barb structure; 32-Fixing bracket; 33-Breathable groove. Detailed Implementation

[0044] To make the technical problems, technical solutions, and advantages of this application clearer, a detailed description will be provided below in conjunction with the accompanying drawings and specific embodiments. In the following description, specific details such as particular configurations and components are provided merely to aid in a comprehensive understanding of the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Furthermore, for clarity and brevity, descriptions of known functions and structures have been omitted.

[0045] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0046] In the various embodiments of this application, it should be understood that the sequence number of each process described below does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0047] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, without limiting the number of objects; for example, the first object can be one or more. Furthermore, "or" in this application indicates at least one of the connected objects. For example, "A or B" covers three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0049] To address the problems of poor durability and easy damage in existing waterproof and breathable valves, this utility model provides a waterproof and breathable valve.

[0050] Figure 1 This is a schematic diagram of the overall structure of the waterproof and breathable valve provided in this embodiment of the utility model. Figure 1 As shown, this utility model embodiment provides a waterproof and breathable valve, comprising:

[0051] Valve body 1, the structural schematic diagram of which is shown below. Figure 2 As shown, the side view of valve body 1 is as follows: Figure 3 As shown. Figure 2 As shown, an axially penetrating through hole 11 is provided inside the valve body 1, and the through hole 11 is used for gas exchange.

[0052] Optionally, the waterproof and breathable valve provided in this embodiment can be applied in a sensor cleaning system. The sensor cleaning system includes a liquid storage structure and a water pump. The water pump needs to draw cleaning fluid from the liquid storage structure to clean the sensor.

[0053] In this embodiment, when the waterproof and breathable valve is applied to a sensor cleaning system, the valve body 1 is used to seal the liquid storage structure, such as a liquid storage tank. Gas exchange between the inside and outside of the liquid storage structure is achieved through the through-hole 11, balancing the internal and external air pressures, eliminating pressure differences, and preventing negative pressure from forming inside the liquid storage tank during the process of the water pump drawing cleaning fluid from the tank. This also prevents the sidewalls of the liquid storage tank from being crushed and deformed by atmospheric pressure due to negative pressure, thereby avoiding problems such as increased pump suction resistance, unstable flow, or even inability to draw liquid, ultimately preventing the sensor cleaning function from failing.

[0054] Optionally, to ensure the sealing of the liquid storage structure, the valve body 1 is made of an elastic material. Specifically, the valve body 1 can be made of the following materials:

[0055] Silicone materials, such as fluorosilicone, have the advantages of high temperature resistance, low temperature resistance, and chemical corrosion resistance, and can be used with various types of liquids;

[0056] Polyurethane materials have good wear resistance;

[0057] Rubber materials have advantages such as good elasticity and aging resistance;

[0058] Thermoplastic polyurethane (TPU) elastomers have the advantages of combining elasticity and hardness, and being easy to process.

[0059] The specific material used for valve body 1 can be determined based on the properties of the liquid stored in the liquid storage structure, and is not limited in this embodiment.

[0060] The valve body 1 can be manufactured using a one-piece molding process.

[0061] Specifically, it can be manufactured using injection molding, compression molding, or 3D printing.

[0062] The through hole 11 can be a through hole with a very small or extremely small diameter that axially penetrates inside the valve body 1.

[0063] In the case of the waterproof and breathable valve provided in this embodiment being used in a sensor cleaning system, due to the capillary effect, the liquid in the liquid storage structure is difficult to pass through this through hole 11, thereby causing leakage from the through hole 11.

[0064] Optionally, the through hole 11 is located at the center of the valve body 1.

[0065] Optionally, the diameter of the through hole 11 is in the range of 0.3 mm - 0.8 mm.

[0066] The waterproof and breathable valve provided in this embodiment also includes a waterproof and breathable membrane 2, the structural schematic diagram of which is shown below. Figure 4 As shown, a waterproof and breathable membrane 2 covers the first end of the through-hole 11.

[0067] In the case of the waterproof and breathable valve provided in this embodiment being used in a sensor cleaning system, the waterproof and breathable valve is generally placed vertically. In this case, the first end of the through hole 11 can be understood as the top end of the through hole 11.

[0068] The waterproof and breathable membrane 2 is a functional film that allows gas molecules to pass through (i.e., allows air to pass through or is breathable) but blocks liquid water molecules from passing through.

[0069] Optionally, waterproof and breathable membranes are mainly divided into two categories: microporous membranes and non-porous membranes.

[0070] The microporous membrane is covered with pores smaller than water molecules. In this embodiment, the waterproof and breathable valve can be used in a sensor cleaning system, where the microporous membrane prevents liquid leakage from the storage structure. Alternatively, the non-porous membrane, through its special chemical structure, can also prevent liquid leakage from the storage structure when used in a sensor cleaning system.

[0071] The waterproof and breathable membrane 2 is made of the following materials:

[0072] Polytetrafluoroethylene (PTFE) material has the advantages of stable chemical properties, resistance to high and low temperatures, and excellent air permeability.

[0073] Polyethylene or polypropylene materials have the advantages of good tensile strength and low cost;

[0074] Polyurethane materials have the advantages of good waterproofness and high durability.

[0075] The aforementioned through hole 11 serves as the primary waterproof structure, while the waterproof and breathable membrane 2 serves as the secondary waterproof structure. The waterproof and breathable membrane 2 can also be referred to as the final waterproof guarantee, blocking any trace amounts of liquid that may leak through the through hole 11 and achieving an absolute seal.

[0076] The waterproof and breathable valve provided in this embodiment also includes a fixing component 3, which is connected to the valve body 1. A schematic diagram of the connection between the fixing component 3 and the valve body 1 is shown below. Figure 1 As shown in the diagram. A schematic diagram of the structure of the fixing component 3 is shown below. Figure 5 As shown, the side view of fixed component 3 is as follows: Figure 6 As shown, the top view of fixed component 3 is as follows: Figure 7 As shown.

[0077] Optionally, the fixing component 3 is detachably connected to the valve body 1.

[0078] The function of the fixing component 3 is to cover the first end of the through hole 11 with the waterproof and breathable membrane 2. Specifically, by connecting the fixing component 3 to the valve body 1, the fixing component 3 fixes the waterproof and breathable membrane 2 to the first end of the through hole 11, so that the waterproof and breathable membrane 2 covers the first end of the through hole 11. In order to ensure the breathability of the waterproof and breathable membrane 2 and enable gas exchange in the through hole 11, a breathable structure is provided on the fixing component 3.

[0079] In the case of the waterproof and breathable valve provided in this embodiment being used in a sensor cleaning system, in some embodiments, such as Figure 2 and Figure 3 As shown, a locking groove 12 is provided on the outer wall surface of the valve body 1. The locking groove 12 is used to adapt and connect with the edge of the valve hole of the liquid storage structure.

[0080] Specifically, when the liquid storage structure is a liquid storage vessel, the valve body 1 is inserted into the valve hole of the liquid storage vessel. During the insertion process, the valve body 1 deforms. After the valve body 1 enters the valve hole of the liquid storage vessel, the engaging groove 12 tightly engages with the vessel wall of the liquid storage vessel at the edge of the valve hole. This ensures that the engaging groove 12 bites the edge of the valve hole, ensuring the sealing and connection between the valve body 1 and the edge of the valve hole of the liquid storage structure, thus forming a reliable seal and fixation.

[0081] It should be noted that the size of the locking groove 12 can be designed according to the edge of the valve hole of the liquid storage structure, and is not limited in this embodiment.

[0082] Optionally, at least two engaging grooves 12 are formed on the outer wall surface of the valve body 1. The two engaging grooves 12 can be different to allow the valve body 1 to adapt to liquid storage structures with different wall thicknesses and ensure sealing.

[0083] In some embodiments, such as Figure 2 and Figure 3 As shown, a fixing groove 13 is formed on the outer wall surface of the valve body 1. The fixing component 3 is provided with a fastener protruding towards the valve body 1, which is connected to the fixing groove 13 through the fastener, and the fixing component 3 is connected to the valve body 1.

[0084] The fixing groove 13 is closer to the first end of the valve body 1 than the engaging groove 12, wherein the first end of the valve body 1 is the end located outside the liquid storage structure.

[0085] It should be noted that when the waterproof and breathable valve provided in this embodiment is used in a sensor cleaning system, the waterproof and breathable valve is generally placed vertically. In this case, the first end of the valve body 1 can be understood as the top of the valve body 1.

[0086] Specifically, the fasteners and fixing grooves 13 can be connected by snap-fit ​​connection, interlocking connection, splicing connection, etc., and the fasteners have different shapes depending on the connection method.

[0087] Optionally, the fastener can be connected to the fixing groove 13 in two ways: Method 1 and Method 2.

[0088] Method 1:

[0089] like Figure 2 As shown, at least two fixing holes 14 are formed between the first end of the valve body 1 and the first groove wall of the fixing groove 13. It can be understood that the fixing holes 14 pass through the first end of the valve body 1 and the first groove wall of the fixing groove 13.

[0090] It should be noted that when the waterproof and breathable valve provided in this embodiment is used in a sensor cleaning system, the waterproof and breathable valve is generally placed vertically. In this case, the first groove wall of the fixing groove 13 can be understood as the top wall of the fixing groove 13.

[0091] like Figure 5 and Figure 6 As shown, the fastener includes at least two fixing teeth 31.

[0092] The fixing tooth 31 passes through the fixing hole 14 and engages with the wall of the first groove. The fixing fastener engages with the fixing groove 13, thereby connecting the fixing component 3 to the valve body 1. A schematic diagram of the connection between the fixing component 3 and the valve body 1 using this method is shown below. Figure 1 As shown.

[0093] It should be noted that the number of fixing teeth 31 is equal to the number of fixing holes 14, and one fixing tooth 31 passes through a fixing hole 14.

[0094] Preferably, the number of fixing holes 14 is 2-4, and the number of fixing teeth 31 is 2-4.

[0095] Furthermore, such as Figure 5 and Figure 6 As shown, a barb structure 311 is provided at one end of the fixed tooth 31, which is engaged with the wall of the first groove.

[0096] It is understandable that one end of the fixed tooth 31 is the end of the fixed tooth 31.

[0097] Specifically, after the fixing tooth 31 is inserted into the fixing hole 14 through this method, a barb structure 311 is provided at one end of the fixing tooth 31 to secure the first groove wall, ensuring the stability of the connection between the fixing component 3 and the valve body 1.

[0098] Method 2:

[0099] The fastener includes at least two fixing claws, which lock the groove 13 in place. The fastener is connected to the fixing groove 13, thereby connecting the fixing component 3 to the valve body 1.

[0100] Specifically, in this second method, the fixed jaw can be an elastic jaw or a rigid jaw.

[0101] When the fixed claw is an elastic claw, it is compressed by external force to shrink. After the protruding part of the fixed claw is embedded in the fixed groove 13, the fixed claw elastically recovers, so that the fixed claw latches into the fixed groove 13, thereby realizing the connection between the fixed component 3 and the valve body 1.

[0102] When the fixed jaw is a rigid jaw, the fixed jaw is pushed radially by an external force. After the protruding part of the fixed jaw is engaged in the fixed groove 13, the fixed jaw is locked with the fixed groove 13, thereby realizing the connection between the fixed component 3 and the valve body 1.

[0103] In some embodiments, the waterproof and breathable valve further includes an adhesive component 4, which optionally has double-sided adhesiveness, such as a double-sided adhesive tape.

[0104] The adhesive component 4 is used to attach the waterproof and breathable membrane 2 to the first end of the through hole 11. Specifically, when the adhesive component 4 has double-sided adhesiveness, the adhesive component 4 attaches the waterproof and breathable membrane 2 to the first end of the through hole 11 by attaching it to one side and attaching it to the first end of the through hole 11 by attaching it to the other side.

[0105] Optionally, the adhesive component 4 is an annular structure, that is, the adhesive component 4 is a hollow structure. The pore diameter of the annular adhesive component 4 is larger than the pore diameter of the through hole 11. The annular adhesive component 4 is pasted on the outer periphery of the through hole 11 so as not to affect the air permeability (or ventilation) of the through hole 11.

[0106] Alternatively, the adhesive component 4 may be circular, and a vent hole may be provided in the middle of the adhesive component 4. The diameter of the circular adhesive component 4 is larger than the diameter of the through hole 11, so as to ensure that the circular adhesive component 4 covers the first end of the through hole 11.

[0107] It is understandable that the central part of the circular adhesive component 4 is formed as a hollow structure or a mesh structure to avoid affecting the air permeability (or ventilation) of the through hole 11. That is, the hollow structure or mesh structure is a breathable area.

[0108] Optionally, in this embodiment, the waterproof and breathable membrane 2 can also be a circular structure, and the diameter of the waterproof and breathable membrane 2 is equal to or slightly larger than the aperture of the through hole 11.

[0109] The specific method of connection between the fixing component 3 and the valve body 1 is described in the above method one:

[0110] Adhesive component 4 is attached to the waterproof and breathable membrane 2 on one side, and the protective layer on the other side is peeled off. Align it with the first end of the through hole 11 on the valve body 1, and attach the waterproof and breathable membrane 2 to the first end of the through hole 11 through the other side. Align the fixing teeth 31 on the fixing component 3 with the through fixing hole 14, and press firmly. The fixing teeth 31 engage with the wall of the first groove. The barb structure 311 at the first end of the fixing teeth 31 will hook onto the wall of the first groove, thereby pressing the fixing component 3, adhesive component 4 and waterproof and breathable membrane 2 tightly onto the outer end face of the valve body 1 to form a final seal.

[0111] In some embodiments, the fixing component 3 includes a fixing bracket 32 ​​for fixing the waterproof and breathable membrane 2 to the first end of the through hole 11. The shape of the fixing bracket 32 ​​includes at least one of the following: cross-shaped, T-shaped, I-shaped, Y-shaped, and cylindrical.

[0112] In this embodiment, the cross-shaped, T-shaped, I-shaped, and Y-shaped fixing brackets 32 abut against the waterproof and breathable membrane 2, meaning that the fixing brackets 32 do not completely cover the waterproof and breathable membrane 2 to avoid affecting its breathability. The gaps between the cross-shaped, T-shaped, I-shaped, and Y-shaped fixing brackets 32 can be understood as the breathable structure provided on the fixing components 3, ensuring the breathability of the waterproof and breathable membrane 2.

[0113] The schematic diagram of the cross-shaped fixing bracket 32 ​​fixing the waterproof and breathable membrane 2 is shown below. Figure 8 As shown.

[0114] For the cylindrical fixing bracket 32, it can be designed in one of the following four shapes to ensure that the waterproof and breathable membrane 2 is breathable:

[0115] 1. The first and second end faces of the cylindrical fixing bracket 32 ​​are hollow structures;

[0116] Among them, the first end face and the second end face of the cylindrical fixing bracket 32 ​​are two opposite end faces of the cylindrical fixing bracket 32. That is, the cylindrical fixing bracket 32 ​​is a cylindrical structure without end faces. It abuts against the waterproof and breathable membrane 2 through the first end face and breathes through the second end face.

[0117] 2. The first end face and the second end face of the cylindrical fixing bracket 32 ​​are of a grid structure (or a lattice structure).

[0118] Among them, the first end face and the second end face of the cylindrical fixing bracket 32 ​​are two opposite end faces of the cylindrical fixing bracket 32. That is, the cylindrical fixing bracket 32 ​​is a cylindrical structure with end faces. The first end face abuts against the waterproof and breathable membrane 2. However, since the first end face and the second end face are mesh structures, the waterproof and breathable membrane 2 can be breathable.

[0119] 3. The first end face of the cylindrical fixing bracket 32 ​​is a hollow structure, and the outer peripheral surface of the cylindrical fixing bracket 32 ​​is a grid structure (or lattice structure).

[0120] The first end face of the cylindrical fixing bracket 32 ​​faces the waterproof and breathable membrane 2. That is, the cylindrical fixing bracket 32 ​​is a cylindrical structure with only one end face (i.e., only a second end face opposite to the first end face). It supports the waterproof and breathable membrane 2 through the first end face, but because the outer peripheral surface of the fixing bracket 32 ​​is a mesh structure, it can ensure that the waterproof and breathable membrane 2 is breathable.

[0121] Fourth, the first end face of the cylindrical fixing bracket 32 ​​is a mesh structure, and the outer peripheral surface of the cylindrical fixing bracket 32 ​​is a mesh structure (or grid structure).

[0122] The first end face of the cylindrical fixing bracket 32 ​​faces the waterproof and breathable membrane 2. That is, the cylindrical fixing bracket 32 ​​is a cylindrical structure with two end faces. It supports the waterproof and breathable membrane 2 through the first end face. However, since the first end face and the outer peripheral surface of the fixing bracket 32 ​​are mesh structures, the waterproof and breathable membrane 2 can be breathable.

[0123] Optionally, a dustproof net or a perforated net with a labyrinth structure can be covered on the second end face of the cylindrical fixing bracket 32 ​​to further prevent external dust and pollutants from directly contacting the waterproof and breathable membrane 2 without affecting its breathability. The second end face of the fixing bracket 32 ​​is the end face furthest from the waterproof and breathable membrane 2.

[0124] It should be noted that the fixing bracket 32 ​​can be made of rigid or semi-rigid plastic material.

[0125] Specifically, the rigid plastic material that the fixing bracket 32 ​​can be made of includes at least one of the following:

[0126] Polyethylene material, which has advantages such as high rigidity and impact resistance;

[0127] Polypropylene material, which has advantages such as temperature resistance;

[0128] Polyvinyl chloride (PVC) material, which has advantages such as high hardness;

[0129] Engineering plastic materials have advantages such as higher rigidity and strength.

[0130] The semi-rigid plastic material that can be used for the fixing bracket 32 ​​includes at least one of the following:

[0131] Semi-rigid polyvinyl chloride material, which has the advantage of high flexibility;

[0132] Polymethyl methacrylate (PMMA) has advantages such as ease of processing.

[0133] In some embodiments, such as Figure 5 or Figure 7 As shown, the fixing component 3 is a cover structure. In order to further ensure that the waterproof and breathable membrane 2 is breathable (or ventilated), at least one vent hole or at least one vent groove 33 is opened on the outer wall surface of the fixing component 3.

[0134] The ventilation groove 33 can be understood as a groove opened on the outer wall of the fixing component 3 and connected to the edge of the fixing component 3.

[0135] It should also be noted that the waterproof and breathable valve provided in this embodiment can also be integrated with the cover of the liquid storage structure or the water pump bracket, further reducing the number of parts installed on the liquid storage structure.

[0136] The following details the specific working process of the water pump drawing cleaning fluid from the reservoir to clean the sensor in the sensor cleaning system:

[0137] When the water pump draws cleaning fluid from the reservoir, a negative pressure is generated inside the reservoir. This creates a pressure difference between the external atmospheric pressure and the pressure inside the reservoir. Air quickly enters the reservoir through the waterproof and breathable membrane 2 and the through-hole 11 of the valve body 1, instantly balancing the pressure. This protects the reservoir from deformation and ensures the normal operation of the water pump.

[0138] Furthermore, since the liquid level in the reservoir is generally not very high, the resulting hydraulic pressure is much lower than the external atmospheric pressure. Due to the capillary action of the through-hole 11, the liquid in the reservoir is unlikely to leak out. Even if a very small amount of liquid flows out of the through-hole 11, it will be blocked by the waterproof and breathable membrane 2, achieving the effect of effectively preventing liquid leakage and external contaminant intrusion under any conditions, with extremely high reliability.

[0139] In summary, through the through-hole 11, the waterproof and breathable membrane 2, and the breathable structure, the waterproof and breathable membrane can effectively balance internal and external pressures and eliminate pressure differences. Furthermore, a fixing component 3 is installed outside the waterproof and breathable membrane 2 to secure it, ensuring its firm installation, preventing damage, and increasing the service life of the waterproof and breathable valve. The waterproof and breathable valve provided in this embodiment is an integrated valve body based on the microporous capillary principle and a secondary protection system using a waterproof and breathable membrane. The extremely small through-hole diameter makes it difficult for liquid to pass through due to surface tension, while air can freely pass through under the pressure difference between the external atmospheric pressure and the negative pressure inside the vessel. The second-stage waterproof and breathable membrane serves as the final guarantee, blocking any possible trace amounts of liquid vapor and achieving an absolute seal.

[0140] Furthermore, all components of the waterproof and breathable valve provided in this embodiment can be integrated into a miniature valve body, which is small in size and occupies very little space, making it very suitable for sensor cleaning systems with demanding space requirements. In addition, the valve body and the reservoir wall are connected by elastic buckles, and the membrane assembly is locked by a barbed mechanical lock, making the assembly process simple, fast and secure, which is very suitable for automated production. All parts are common injection molded parts or standard parts, and the cost is controllable.

[0141] The above describes the preferred embodiments of this utility model. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of this utility model, and these improvements and modifications are also within the protection scope of this utility model.

Claims

1. A waterproof and breathable valve, characterized in that, include: The valve body (1) has an axially penetrating through hole (11) inside, which is used for gas exchange. A waterproof and breathable membrane (2) is provided, which covers the first end of the through hole (11); The fixing component (3) is connected to the valve body (1) and is connected to the valve body (1) through the fixing component (3). The fixing component (3) fixes the waterproof and breathable membrane (2) to the first end of the through hole (11), and the fixing component (3) is provided with a breathable structure to ensure that the waterproof and breathable membrane (2) is breathable.

2. The waterproof and breathable valve according to claim 1, characterized in that, The valve body (1) has a locking groove (12) on its outer wall surface, which is used to fit and connect with the edge of the valve hole of the liquid storage structure.

3. The waterproof and breathable valve according to claim 1, characterized in that, A fixing groove (13) is opened on the outer wall surface of the valve body (1), and the fixing component (3) is provided with a fastener protruding towards the valve body (1). The fixing component (3) is connected to the valve body (1) by the fastener and the fixing groove (13).

4. The waterproof and breathable valve according to claim 3, characterized in that, At least two fixing holes (14) are opened between the first end of the valve body (1) and the first groove wall of the fixing groove (13). The fastener includes at least two fixing teeth (31). The fixing teeth (31) pass through the fixing holes (14) and engage with the first groove wall. The fastener is connected to the fixing groove (13). And / or, The fastener includes at least two fixing claws, which engage with the fixing groove (13) and are connected to the fixing groove (13).

5. The waterproof and breathable valve according to claim 4, characterized in that, One end of the fixed tooth (31) is provided with a barb structure (311), which engages with the wall of the first groove.

6. The waterproof and breathable valve according to any one of claims 1-5, characterized in that, The valve body (1) is manufactured using an integral molding process.

7. The waterproof and breathable valve according to claim 1, characterized in that, The waterproof and breathable valve also includes an adhesive component (4) for attaching the waterproof and breathable membrane (2) to the first end of the through hole (11).

8. The waterproof and breathable valve according to claim 7, characterized in that, The adhesive component (4) has a ring structure; or, The adhesive component (4) has a circular structure, and a vent hole is provided in the middle of the adhesive component (4).

9. The waterproof and breathable valve according to claim 1, characterized in that, The fixing component (3) includes a fixing bracket (32) for fixing the waterproof and breathable membrane (2) to the first end of the through hole (11), and the shape of the fixing bracket (32) includes at least one of the following: Cross shape; T-shape; I-shaped; Y-shaped; Cylindrical; The first end face and the second end face of the cylindrical fixing bracket (32) are hollow structures. Alternatively, the first end face and the second end face of the cylindrical fixing bracket (32) are mesh structures; Alternatively, the first end face of the cylindrical fixing bracket (32) is a hollow structure, and the outer circumferential surface of the cylindrical fixing bracket (32) is a mesh structure; Alternatively, the first end face of the cylindrical fixing bracket (32) is a mesh structure, and the outer peripheral surface of the cylindrical fixing bracket (32) is a mesh structure.

10. The waterproof and breathable valve according to claim 1, characterized in that, The outer wall of the fixing component (3) has at least one vent hole or at least one vent groove (33).

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