Waterproof and breathable valve and photovoltaic inverter

Abstract

The application relates to the photovoltaic technical field, in particular to a waterproof and breathable valve and a photovoltaic inverter. The waterproof and breathable valve comprises a valve body, a waterproof and breathable film and a sealing structure. The valve body comprises a containing cavity, a first breathable hole and a second breathable hole. The first breathable hole and the second breathable hole are respectively connected with the outer surface of the valve body and the containing cavity. The waterproof and breathable film is accommodated in the containing cavity, and the waterproof and breathable film separates the first breathable hole and the second breathable hole. The sealing structure is sealingly connected with the outer surface of the valve body, and the sealing structure covers the port of the first breathable hole on the outer surface of the valve body. The waterproof and breathable valve provided by the application can block the channel of the external gas into the valve body when the equipment is not started, and prevent the external moisture from invading the equipment.

Description

Technical Field

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

[0002] A breathable valve is a device used to control the flow of gas or liquid and balance pressure. It is mainly used in explosion-proof, waterproof, moisture-proof, and filtration fields to protect equipment and machinery from environmental factors such as oxidation and moisture.

[0003] Traditional venting valves achieve air permeability while remaining waterproof through a waterproof and breathable membrane. However, some moisture inevitably passes through the membrane and enters the valve. In scenarios involving long construction periods or prolonged periods of non-use after assembly, the continuous entry of moisture into the valve body while idle can lead to humidity accumulation, potentially causing malfunctions in internal electrical components of unused equipment. Utility Model Content

[0004] This application provides a waterproof and breathable valve and a photovoltaic inverter. The waterproof and breathable valve can block the passage for external gas to enter the valve body when the equipment is not in use, thus preventing external moisture from entering the equipment.

[0005] In a first aspect, this application provides a waterproof and breathable valve, which includes a valve body, a waterproof and breathable membrane, and a sealing structure; the valve body includes a receiving cavity, a first vent hole, and a second vent hole, the first vent hole and the second vent hole respectively connecting the outer surface of the valve body and the receiving cavity; the waterproof and breathable membrane is housed in the receiving cavity and isolates the first vent hole and the second vent hole; the sealing structure is sealed to the outer surface of the valve body and covers the port of the first vent hole located on the outer surface of the valve body.

[0006] The aforementioned waterproof and breathable valve achieves the effect of allowing air to pass through while preventing water penetration, maintaining pressure balance inside and outside the equipment when applied to photovoltaic inverters or other devices. When the equipment is not started or during assembly, the sealing structure of the waterproof and breathable valve prevents external gas from entering the valve body, avoiding external moisture or dust from entering the equipment and causing failure of internal electrical components. Removing the valve when the equipment is started restores its function of facilitating airflow and balancing internal and external air pressure. Any moisture that enters the equipment through the waterproof and breathable valve can be handled by the equipment's own dehumidification device, maintaining dryness inside the equipment. This waterproof and breathable valve features a minimally invasive and simple design, resulting in low cost and high practicality.

[0007] In one embodiment, the sealing structure is a sealing cap, and a first sealing ring is provided between the sealing cap and the valve body. The first sealing ring surrounds the port of the first vent located on the outer surface of the valve body. The first sealing ring can be pressed together between the valve body and the sealing structure to further prevent gas from the external environment from entering the first vent through the gap between the sealing structure and the valve body.

[0008] In one embodiment, at least one of the surface of the sealing cap facing the valve body and the surface of the valve body facing the sealing cap is provided with a first sealing groove, the first sealing groove being used to accommodate a first sealing ring. The first sealing groove can increase the stability and sealing effect of the first sealing ring.

[0009] In one embodiment, the outer surface of the valve body includes a first convex surface and a first end face surrounding the first convex surface. Along the arrangement direction of the first and second vent holes, the first convex surface protrudes beyond the first end face, and the first vent hole connects the first convex surface to the receiving cavity. The surface of the sealing cover facing the valve body includes a sealing concave surface and a sealing inner wall surrounding the sealing concave surface. The sealing concave surface is recessed relative to the sealing inner wall in a direction away from the valve body. The sealing concave surface is used to contact the first convex surface, and the sealing inner wall is used to contact the first end face. The first sealing ring is accommodated between the first convex surface and the sealing concave surface. The sealing structure and the valve body form a multi-faceted contact fit, which can improve the sealing effect of the sealing structure in blocking the first vent hole.

[0010] In one embodiment, the outer surface of the valve body includes a circumferential side surface surrounding the first end face, and the sealing cover includes a circumferential inner wall surrounding the sealing inner wall, which surrounds the circumferential side surface. The sealing inner wall contacts the first end face, the sealing concave surface contacts the first convex surface, and the circumferential inner wall contacts the circumferential side surface. This creates a three-face contact fit between the sealing structure and the valve body, improving the sealing effect of the sealing structure in blocking the first vent hole. The circumferential side surface includes a protruding boss, and the circumferential inner wall includes a groove for engaging with the boss. The boss can be embedded in the groove, preventing the sealing structure from disengaging from the valve body along the direction opposite to the first and second end faces.

[0011] In one embodiment, the valve body includes a threaded hole with its opening located on a first convex surface; the sealing cap includes a through hole that penetrates the sealing cap along a direction opposite to the sealing concave surface and the first convex surface; the through hole allows a threaded connector to pass through and connect with the threaded hole to secure the sealing cap to the valve body. One end of the threaded connector passes through the through hole of the sealing structure and is threadedly connected to the threaded hole on the valve body, thereby securing the sealing structure to the valve body and preventing the sealing structure from detaching from the valve body along a direction opposite to the first and second end faces. The threaded connection method offers higher reliability and the advantage of reusability.

[0012] In one embodiment, the first convex surface includes one of a positioning hole and a positioning post, and the sealing concave surface includes the other of a positioning hole and a positioning post. The positioning post is used to insert into the positioning hole along the direction opposite to the sealing concave surface and the first convex surface. This ensures that each through hole can correspond to a threaded hole along the direction opposite to the sealing concave surface and the first convex surface, improving installation convenience.

[0013] In one embodiment, the sealing structure is a sealing membrane, which is bonded to the outer surface of the valve body. The bonding area between the sealing membrane and the valve body at least surrounds the port of the first vent located on the outer surface of the valve body. The sealing membrane provides a good sealing effect while being more convenient in the processes of applying and removing the seal, and it also occupies a smaller volume.

[0014] In one embodiment, the sealing membrane includes a membrane structure with an integral structure and a handle. The membrane structure is used to bond to the valve body and cover the port of the first vent located on the outer surface of the valve body. The handle protrudes from the edge of the membrane structure, making it convenient for workers to remove the sealing structure by lifting and grasping the handle.

[0015] In one embodiment, the waterproof and breathable valve further includes a reversible hygroscopic material housed within the receiving cavity, the reversible hygroscopic material being spaced between the waterproof and breathable membrane and the second vent. Moisture passing through the waterproof and breathable membrane can be absorbed by the reversible hygroscopic material, further reducing the humidity of the moisture and making the gas entering the device through the second vent drier.

[0016] In one embodiment, along the direction from the first vent to the second vent, the receiving cavity includes a first chamber and a second chamber that are connected. A waterproof and breathable membrane is housed in the first chamber, and a reversible moisture-absorbing material is housed in the second chamber. Along the direction perpendicular to the first vent to the second vent, the radial dimension of the first chamber is smaller than the radial dimension of the second chamber. A stepped surface is formed between the first and second chambers, facing away from the waterproof and breathable membrane. The radial dimension of the reversible moisture-absorbing material is larger than the radial dimension of the first chamber. The reversible moisture-absorbing material can more comprehensively absorb moisture that permeates through the waterproof and breathable membrane, and the stepped surface between the first and second chambers can prevent the reversible moisture-absorbing material from entering the first chamber and contacting the waterproof and breathable membrane.

[0017] Secondly, this application provides a photovoltaic inverter, which includes a housing and at least one waterproof and breathable valve as described in the first aspect above. The housing includes at least one venting channel connecting the inside and outside of the housing, and each venting channel is equipped with a waterproof and breathable valve. A first vent is connected to the external space of the housing, and a second vent is connected to the internal space of the housing. The waterproof and breathable valve can achieve waterproof and breathable effects, helping the photovoltaic inverter to achieve internal and external pressure balance and keep the inside of the equipment dry and the components safe. When the equipment is not in use, the sealing structure of the waterproof and breathable valve can block the first vent, blocking the passage of external gas into the valve body, fundamentally isolating external moisture from intruding into the equipment. When the equipment is in use, the waterproof and breathable valve can function by simply removing or destroying the sealing structure to expose the first vent, achieving airflow balance between internal and external air pressure. When the equipment is in use, external moisture enters the equipment through the waterproof and breathable valve, and the equipment can activate its own active dehumidification device to dry the air. This waterproof and breathable valve has a simple structure and high practicality in application, and can be widely used in equipment dehumidification in outdoor environments.

[0018] In one embodiment, the outer surface of the valve body includes a second convex surface and a second end face surrounding the second convex surface. Along the arrangement direction of the first and second vent holes, the second convex surface protrudes beyond the second end face. The second vent hole connects the second convex surface to the receiving cavity. The second end face is used to seal the outer surface of the housing. The second end face of the valve body is sealed to the housing, and the second convex surface can communicate with the internal space of the housing, enabling the passage of gas between the inside and outside.

[0019] In one embodiment, a second sealing ring is provided between the second end face and the housing, and the second sealing ring surrounds the second convex surface. The second sealing ring can be pressed tightly against both the valve body and the housing to achieve a seal, preventing external ambient gas from entering the device through the gap between the housing and the valve body.

[0020] In one embodiment, at least one of the second end face and the outer surface of the housing is provided with a second sealing groove, which is used to accommodate a second sealing ring and can increase the stability and sealing effect of the second sealing ring. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a photovoltaic inverter provided in an embodiment of this application;

[0022] Figure 2a This is a schematic diagram of the structure of a waterproof and breathable valve provided in an embodiment of this application;

[0023] Figure 2b An exploded view of a waterproof and breathable valve provided in an embodiment of this application;

[0024] Figure 2cAn exploded view of a waterproof and breathable valve provided in an embodiment of this application;

[0025] Figure 2d A cross-sectional structural diagram of a waterproof and breathable valve provided in an embodiment of this application;

[0026] Figure 3a An exploded view of a waterproof and breathable valve provided in an embodiment of this application;

[0027] Figure 3b A cross-sectional structural diagram of a waterproof and breathable valve provided in an embodiment of this application;

[0028] Figure 4a An exploded view of a waterproof and breathable valve provided in an embodiment of this application;

[0029] Figure 4b A cross-sectional structural diagram of a waterproof and breathable valve provided in an embodiment of this application;

[0030] Figure 5a An exploded view of a waterproof and breathable valve provided in an embodiment of this application;

[0031] Figure 5b A cross-sectional structural diagram of a waterproof and breathable valve provided in an embodiment of this application;

[0032] Figure 6a An exploded view of a waterproof and breathable valve provided in an embodiment of this application;

[0033] Figure 6b A cross-sectional structural diagram of a waterproof and breathable valve provided in an embodiment of this application;

[0034] Figure 7a This is a schematic diagram of the structure of a waterproof and breathable valve provided in an embodiment of this application;

[0035] Figure 7b An exploded view of a waterproof and breathable valve provided in an embodiment of this application;

[0036] Figure 8 A cross-sectional structural diagram of a waterproof and breathable valve provided in an embodiment of this application;

[0037] Figure 9a An exploded view of a waterproof and breathable valve provided in an embodiment of this application;

[0038] Figure 9b A cross-sectional structural diagram of a waterproof and breathable valve provided in an embodiment of this application;

[0039] Figure 9c This is a schematic diagram illustrating the application status of a waterproof and breathable valve provided in an embodiment of this application.

[0040] Figure label:

[0041] 100 - Photovoltaic inverter; 10 - Waterproof and breathable valve; 20 - Housing; 201 - Base plate; 30 - Power conversion device;

[0042] 1-Valve body; 2-Waterproof and breathable membrane; 3-Sealing structure; 31-Membrane body; 32-Handle; 4-First sealing ring; 5-Threaded connector; 6-Reversible moisture-absorbing material; 7-Second sealing ring;

[0043] A1 - First end; A2 - Second end; D1 - First end face; D11 - First convex surface; D2 - Second end face; D21 - Second convex surface; D3 - Circumferential side surface; K1 - First vent hole; K2 - Second vent hole; M1 - Sealing inner wall; M11 - Sealing concave surface; M2 - Circumferential inner wall; Q - Receiving cavity; Q1 - First chamber; Q2 - Second chamber; P1 - Threaded hole; P2 - Through hole; S1 - Positioning hole; S2 - Positioning post; T1 - Boss; T2 - Slot; V1 - First sealing groove; V2 - Second sealing groove; W - Vent channel. Detailed Implementation

[0044] Traditional vent valves consist of a valve body and a waterproof and breathable membrane. The membrane allows air to pass through while preventing water penetration, thus balancing the internal and external air pressure of the valve body and providing waterproofing. These valves are widely used in automotive, chemical, energy storage, medical, and aerospace industries. However, vent valves are exposed to the external environment, and over time, moisture inevitably seeps through the membrane into the valve body. In some scenarios, equipment equipped with vent valves may undergo prolonged installation or be idle for extended periods after assembly. This can lead to a buildup of moisture in the vent valve before it is activated. Moisture entering unused equipment can damage internal electrical components, potentially causing them to malfunction.

[0045] Based on this, this application provides a waterproof and breathable valve and a photovoltaic inverter. In scenarios where the equipment is not in use, the waterproof and breathable valve can prevent ambient moisture from entering the equipment and causing adverse effects on the electrical components inside the equipment.

[0046] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0047] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to also include expressions such as “one or more” unless the context clearly indicates otherwise.

[0048] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0049] Waterproof and breathable valves, as a type of structure that allows air to pass through while preventing water from entering, are widely used in outdoor equipment across various fields. One end of the waterproof and breathable valve is connected to the external environment, while the other end is connected to the interior of the equipment. This prevents moisture from the external environment from entering the equipment, thus protecting the performance of internal electrical components and ensuring the safety of electrical connections.

[0050] by Figure 1 The photovoltaic inverter 100 shown is an example. The photovoltaic inverter 100 includes a housing 20 and a power conversion device 30 housed within the housing 20. The power conversion device 30 converts the variable DC voltage generated by the photovoltaic solar panels into AC power at the mains frequency to supply the power grid or electrical equipment. During operation, the power conversion device 30 generates heat, causing the air inside the housing 20 to expand. This requires venting the air from the housing 20 to maintain pressure balance. Changes in ambient temperature or altitude can also affect the pressure difference inside and outside the housing 20, necessitating pressure adjustment. In environments with high humidity or poor air quality, it is also necessary to prevent moisture or dust from entering the housing 20 and adversely affecting the power conversion device 30. To maintain pressure balance inside and outside the housing 20 of the photovoltaic inverter 100, the photovoltaic inverter 100 is equipped with at least one waterproof vent valve 10, which is fixed to the housing 20 and connects to both the internal space of the housing 20 and the external environment.

[0051] like Figure 1As shown, the housing 20 includes at least one ventilating channel W connecting the inside and outside of the housing 20, and each ventilating channel W is equipped with a waterproof vent valve 10. Along the extending direction of the ventilating channel W, the waterproof vent valve 10 includes a first end A1 and a second end A2, with the first end A1 protruding outside the housing 20 and the second end A2 located inside the housing 20. The first end A1 and the second end A2 of the waterproof vent valve 10 form a gas passage, allowing gas circulation between the inside and outside of the housing 20, maintaining air exchange between the interior of the photovoltaic inverter 100 and the external environment, ensuring pressure balance, and preventing alternating positive and negative pressure differences due to temperature changes. A waterproof structure is provided between the first end A1 and the second end A2 of the waterproof vent valve 10, preventing moisture from the external environment from entering the housing 20.

[0052] To protect the waterproof vent valve 10, it is installed at the bottom of the housing 20 along the direction of gravity and does not protrude from the side of the housing 20, preventing rain and snow from entering the waterproof vent valve 10 or objects falling from above from damaging it. Specifically, the housing 20 includes a base plate 201 facing the ground, through which any one of the ventilation channels T passes.

[0053] During the on-site installation of the photovoltaic inverter 100, there are often scenarios where it is mounted but not powered on for extended periods due to construction reasons. The already installed waterproof vent valve 10 will be exposed to the external environment for a long time, and the dehumidification strategy inside the photovoltaic inverter 100, which requires power to activate, will not be able to start. Moisture from the external environment will continuously enter the waterproof vent valve 10, causing moisture accumulation inside the valve body and even entering the housing 20 of the photovoltaic inverter 100, potentially causing the power conversion device 30 of the photovoltaic inverter 100 to fail. Failure of the power conversion device 30 of the photovoltaic inverter 100 requires replacement of the board or even complete unit maintenance, increasing maintenance costs and affecting customer power generation, thus reducing customer experience. The waterproof vent valve 10 provided in this embodiment can prevent moisture from the external environment from entering the housing 20 when it is not used for extended periods, thereby protecting the power conversion device 30 of the photovoltaic inverter 100, reducing maintenance costs, and improving customer experience.

[0054] It should be understood that moisture is used to describe a state of high humidity in the air. Humidity is a physical quantity that measures the amount of water vapor contained in the air. At a given temperature, the less water vapor in a given volume of air, the drier the air; the more water vapor, the more humid the air.

[0055] Figure 2a The present application provides a structure for a waterproof and breathable valve 10, which includes a first end A1 and a second end A2. Figure 2b and Figure 2c This is an exploded view of the waterproof and breathable valve 10 viewed from two opposite directions along the first end A1 and the second end A2. Figure 2dThis is a partial cross-sectional structural diagram of the waterproof and breathable valve 10. The direction of the double-headed arrows illustrates the relative direction of the first end A1 and the second end A2.

[0056] Combination Figures 2a to 2d The waterproof and breathable valve 10 shown includes a valve body 1, a waterproof and breathable membrane 2, and a sealing structure 3. The valve body 1 includes a receiving cavity Q, a first vent K1, and a second vent K2. The first vent K1 and the second vent K2 are respectively connected to the outer surface of the valve body 1 and the receiving cavity Q. The first vent K1, the receiving cavity Q, and the second vent K2 can be sequentially connected to form a channel penetrating the valve body 1. The waterproof and breathable membrane 2 is housed within the receiving cavity Q, isolating the first vent K1 and the second vent K2. Gas on both sides of the waterproof and breathable membrane 2 can exchange through it, allowing gas at the first vent K1 to be directed to the second vent K2 or vice versa. Liquid on both sides of the waterproof and breathable membrane 2 cannot pass through it, thus preventing liquid transfer between the first vent K1 and the second vent K2, achieving a breathable yet waterproof effect. The sealing structure 3 is sealed to the outer surface of the valve body 1, and the sealing structure 3 covers the port of the first vent hole K1 located on the outer surface of the valve body 1.

[0057] As an example, when the waterproof vent valve 10 is applied to a photovoltaic inverter 100 or other equipment, the first vent K1 is used to connect to the external environment, and the second vent K2 is used to connect to the internal space of the equipment. When the equipment to which the waterproof vent valve 10 is applied is not in use, the sealing structure 3 covering the first vent K1 forms a structural barrier between the first vent K1 and the external environment, blocking gas exchange between the waterproof vent valve 10 and the external environment. When the equipment is not in use, the sealing structure 3 prevents external moisture from entering the valve body 1 of the waterproof vent valve 10 through the first vent K1, avoiding the continuous accumulation of moisture that can penetrate the waterproof vent membrane 2 and enter the unused equipment. When the equipment to which the waterproof vent valve 10 is applied is started, removing the sealing structure 3 allows the waterproof vent valve 10 to perform its normal waterproof and ventilating functions.

[0058] The waterproof and breathable valve 10 provided in this embodiment can achieve the effect of waterproofing and breathability. Applying this waterproof and breathable valve 10 to… Figure 1When the photovoltaic inverter 100 or other equipment shown is in use, it can maintain the pressure balance inside and outside the equipment and prevent moisture and dust from the external environment from entering the photovoltaic inverter 100. When the equipment is not started or during assembly, the sealing structure 3 of the waterproof vent valve 10 can block the passage of external gas into the valve body 1, preventing moisture and dust from continuously intruding into the valve body 1 and entering the equipment, which could lead to the failure of electrical components inside the equipment. The sealing structure 3 can be removed when the equipment is started to restore the function of the waterproof vent valve 10 in balancing the internal and external air pressure by conducting internal and external air flow. Some of the moisture that enters the equipment through the waterproof vent valve 10 can be dealt with by the equipment's own dehumidification device to keep the equipment dry. The waterproof vent valve 10 itself has a small design modification and simple structure, low cost and high practicality.

[0059] The waterproof and breathable membrane 2 comprises one or more combinations of membrane layers, including thermoplastic polyurethane (TPU) waterproof and breathable membrane, expanded polytetrafluoroethylene (e-PTFE) waterproof and breathable membrane, and PE (polyethylene) polymer breathable membrane. The valve body 1 may be made of plastic, metal, silicone, or a combination of different materials. The waterproof and breathable membrane 2 can be bonded to the valve body 1 through injection molding, ultrasonic welding, or other methods, forming a sealed structure that can block the first vent K1 and the second vent K2.

[0060] In one embodiment, such as Figure 2d As shown, the waterproof and breathable membrane 2 is fixed inside the receiving cavity Q of the valve body 1 and covers the first vent K1 for connecting the port of the receiving cavity Q.

[0061] It should be understood that, in order to maintain a good seal on the first vent K1, the sealing structure 3 may have a relatively secure connection with the valve body 1. When the waterproof vent valve 10 is activated, the connection can be released based on the connection between the two, or the sealing structure 3 can be directly destroyed to allow the first vent K1 to communicate with the external environment.

[0062] In one embodiment, the waterproof and breathable valve 10 has a first vent K1 for exposure to the external environment and a second vent K2 for communication with the internal space of the device. There are multiple first vents K1 and one second vent K2. The diameter of any one first vent K1 is smaller than the diameter of one second vent K2. The smaller diameter prevents impurities from the external environment from passing through the first vents K1 and entering the valve body 1. Having multiple first vents K1 ensures that the gas flow rate through the multiple first vents K1 is similar to the gas flow rate through the second vent K2, satisfying the gas interaction requirements. Of course, the number of second vents K2 can also be two or more.

[0063] As a structural example, such as Figure 2b and Figure 2d As shown, the valve body 1 has a first convex surface D11 on its outer surface and a first end face D1 surrounding the first convex surface D11. The first end face D1 and the first convex surface D11 are located at the first end A1 of the valve body 1 facing the waterproof and breathable valve 10. Along the arrangement direction of the first vent K1 and the second vent K2, the first convex surface D11 protrudes from the first end face D1, and a stepped surface is formed between the first convex surface D11 and the first end face D1. The first vent K1 connects the first convex surface D11 with the receiving cavity Q of the valve body 1. When the sealing structure 3 is connected to the valve body 1, it can cover the port of the first vent K1 on the first convex surface D11.

[0064] like Figure 2c and Figure 2d As shown, the outer surface of the valve body 1 includes a second convex surface D21 and a second end face D2 surrounding the second convex surface D21. The second end face D2 of the second convex surface D21 is located at the end of the valve body 1 facing the second end A2 of the waterproof and breathable valve 10. Along the arrangement direction of the first vent K1 and the second vent K2, the second convex surface D21 protrudes from the second end face D2, and a stepped surface is formed between the second end faces D2 of the second convex surface D21. The second vent K2 connects the second convex surface D21 with the receiving cavity Q of the valve body 1. When the waterproof and breathable valve 10 is assembled in the equipment, the second convex surface D21 is located inside the equipment.

[0065] Along the direction of the first end A1 and the second end A2, the first end face D1 and the second end face D2 are opposite to each other, and the first convex surface D11 and the second convex surface D21 are opposite to each other, so that the first vent K1 and the second vent K2 can be opposite to each other, which can improve the airflow rate of the waterproof vent valve 10 when it conducts airflow and quickly balance the air pressure.

[0066] like Figures 2b to 2d As shown, the outer surface of the valve body 1 also includes a circumferential side surface D3 connected between the first end face D1 and the second end face D2. The circumferential side surface D3 surrounds the circumferential edge of the first end face D1 and the circumferential edge of the second end face D2.

[0067] In one embodiment, the circumferential edges of the first end face D1 and the second end face D2 are respectively circular, the circumferential edge of the first convex surface D11 is polygonal, and the circumferential edge of the second convex surface D12 is circular. Of course, the structural shape of the valve body 1 is only an example here, and this application does not limit the structural shape of the valve body 1.

[0068] The sealing structure 3 provided in this application embodiment may have multiple implementations. As an example, Figures 2a to 2d An example of a sealing structure 3 in the form of a sealing cap is provided. This sealing structure 3 can be fixed to the valve body 1 and seal the first vent hole K1 by means of snap-fit ​​connection, threaded connection, auxiliary structural component connection, etc.

[0069] In one embodiment, to match the structure of the valve body 1, the sealing structure 3 is connected to the valve body 1 in the form of a cap-shaped sealing cover. For example... Figure 2c and Figure 2d As shown, the surface of the sealing structure 3 facing the valve body 1 includes a sealing concave surface M11 and a sealing inner wall M1 surrounding the sealing concave surface M11. The sealing concave surface M11 is recessed relative to the sealing inner wall M1 in a direction away from the valve body 1, and a stepped surface is formed between the sealing concave surface M11 and the sealing inner wall M1. When the sealing structure 3 is assembled into the valve body 1, the sealing concave surface M11 is used to contact the first convex surface D11 of the valve body 1, and the sealing inner wall M1 is used to contact the first end face D1. The sealing concave surface M11 fits against the first convex surface D11, which can achieve the covering and sealing of the first vent hole K1.

[0070] In one embodiment, the surface of the sealing structure 3 facing the valve body 1 further includes a circumferential inner wall M2 surrounding the sealing inner wall M1, which surrounds the circumferential side surface D3 of the valve body 1. The sealing inner wall M1 contacts the first end face D1, the sealing concave surface M11 contacts the first convex surface D11, and the circumferential inner wall M2 contacts the circumferential side surface D3. The sealing structure 3 and the valve body 1 form a three-face contact fit, which can improve the sealing effect of the sealing structure 3 in blocking the first vent hole K1.

[0071] Please continue to refer to Figure 2d As shown, when the sealing structure 3 is connected to the valve body 1, the sealing structure 3 blocks and covers the port of the first vent K1 located on the first convex surface D11, thereby blocking the gas transmission between the first vent K1 and the external environment and preventing moisture from the external environment from entering the valve body 1 through the first vent K1.

[0072] To further improve the sealing effect of the connection between the sealing structure 3 and the valve body 1 on the first vent hole K1, such as... Figure 3aAs shown, a first sealing ring 4 is provided between the sealing structure 3 and the outer surface of the valve body 1. The first sealing ring 4 surrounds the port of the first vent K1 located on the outer surface of the valve body 1. The first sealing ring 4 can be pressed together between the valve body 1 and the sealing structure 3 to further prevent gas from the external environment from entering the first vent K1 through the gap between the sealing structure 3 and the valve body 1. The first sealing ring 4 is made of elastic materials such as silicone or rubber, which can elastically deform under pressure to improve the sealing effect.

[0073] In one embodiment, at least one of the surfaces of the sealing structure 3 facing the valve body 1 and the valve body 1 facing the sealing structure 3 is provided with a first sealing groove V1, which is used to accommodate a first sealing ring 4. The outer diameter of the first sealing ring 4 is larger than the groove depth of the first sealing groove V1. When the first sealing ring 4 is accommodated in the first sealing groove V1, the first sealing ring 4 can protrude from the surface where the first sealing groove V1 is located. When the sealing structure 3 and the valve body 1 are engaged, the first sealing ring 4 can be pressed tightly against the sealing structure 3 and the valve body 1 respectively to achieve a seal. The first sealing groove V1 can increase the stability and sealing effect of the first sealing ring 4.

[0074] When the first sealing groove V1 is provided on the surface of the valve body 1, at least one of the first end face D1, the first convex face D11, or the circumferential side face D3 of the valve body 1 is provided with the first sealing groove V1.

[0075] Figure 3a The example shows that the first convex surface D11 of the valve body 1 is provided with a first sealing groove V1. Figure 3b An example is shown of the cross-sectional structure of the waterproof and breathable valve 10, in which the first sealing ring 4 is disposed between the first convex surface D11 of the valve body 1 and the sealing concave surface M11 of the sealing structure 3. The first sealing ring 4 is housed in the first sealing groove V1 and pressed between the sealing concave surface M11 of the sealing structure 3 and the first convex surface D11 of the valve body 1, thereby achieving a sealing effect.

[0076] Reference Figure 3a and Figure 3b The structure of the waterproof and breathable valve 10 shown illustrates that the position of the first sealing ring 4 between the sealing structure 3 and the valve body 1 may have other implementations, which are not illustrated here. For example, when the first sealing groove V1 is disposed on the first end face D1 of the valve body 1, the first sealing ring 4 is pressed between the first end face D1 and the sealing inner wall M1. When the first sealing groove V1 is disposed on the circumferential side surface D3 of the valve body 1, the first sealing ring 4 is pressed between the circumferential side surface D3 and the circumferential inner wall M2. When the first sealing groove V1 is disposed on the surface of the sealing structure 3 facing the valve body 1, at least one of the sealing concave surface M11, the sealing inner wall M1, and the circumferential inner wall M2 of the sealing structure 3 is provided with the first sealing groove V1.

[0077] Figure 4aAn exploded view of a waterproof and breathable valve 10 is shown, in which the sealing structure 3 is connected to the valve body 1 via a snap-fit ​​connection. Figure 4a As shown, the circumferential side surface D3 of the valve body 1 includes a protruding boss T1, and the circumferential inner wall M2 of the sealing structure 3 includes a groove T2 for engaging with the boss T1. When the sealing structure 3 is connected to the valve body 1, as... Figure 4b As shown, the boss T1 can be embedded in the slot T2, restricting the sealing structure 3 from disengaging from the valve body 1 in the opposite direction of the first end face D1 and the second end face D2.

[0078] As a structural example, the boss T1 is annular, encircling the circumferential side D3. The groove T2 is also annular, encircling the circumferential inner wall M2. Of course, the boss T1 can also be dot-shaped or strip-shaped, which can also satisfy the snap-fit ​​fit between the sealing structure 3 and the valve body 1.

[0079] When the sealing structure 3 and the valve body 1 are engaged by a snap-fit, the two sides of the boss T1 or the two sides of the slot T2 can be inclined along the direction opposite to the first end face D1 and the second end face D2, which makes it easy to remove the sealing structure 3 when the equipment is started.

[0080] Figure 5a An exploded view of another waterproof and breathable valve 10 is shown, in which the sealing structure 3 is threadedly connected to the valve body 1 via threaded fasteners 5 such as screws. Figure 5a As shown, the valve body 1 includes a threaded hole P1, the opening of which is located on the first convex surface D11. The sealing structure 3 includes a through hole P2, which penetrates the sealing structure 3 along the direction opposite to the sealing concave surface M11 and the first convex surface D11. Figure 5b As shown, one end of the threaded connector 5 passes through the through hole P2 of the sealing structure 3 and is threadedly connected to the threaded hole P1 on the valve body 1, thereby fixing the sealing structure 3 to the valve body 1 and preventing the sealing structure 3 from detaching from the valve body 1 in the opposite direction of the first end face D1 and the second end face D2. The threaded connection method has higher reliability and the advantage of reusability.

[0081] As a structural example, the valve body 1 is provided with multiple threaded holes P1, which are arranged around the first vent hole K1. Correspondingly, the sealing structure 3 also includes multiple through holes P2 that correspond one-to-one with the multiple threaded holes P1 along the opposite direction of the sealing concave surface M11 and the first convex surface D11. When the sealing structure 3 is assembled to the valve body 1, one through hole P2 corresponds to another along the opposite direction of the sealing concave surface M11 and the first convex surface D11, and is threadedly connected by a threaded connector 5, which can reliably connect the valve body 1 and the sealing structure 3 around the first vent hole K1.

[0082] Combination Figure 5a and Figure 5bAs shown, when the sealing structure 3 is fixed to the valve body 1 using threaded connectors 5, each threaded connector 5 corresponds to a threaded hole P1 and a through hole P2. To facilitate the accurate connection of the threaded connector 5 through a through hole P2 to a threaded hole P1, the valve body 1 includes one of a positioning hole S1 and a positioning pin S2, and the sealing structure 3 includes the other of a positioning hole S1 and a positioning pin S2. When the sealing structure 3 is assembled to the valve body 1, the positioning pin S2 is used to insert into the positioning hole S1 along the direction opposite to the sealing concave surface M11 and the first convex surface D11, preventing the sealing structure 3 from moving circumferentially relative to the valve body 1 along the circumferential side surface D3 of the valve body 1, and ensuring that each through hole P2 corresponds to a threaded hole P1 along the direction opposite to the sealing concave surface M11 and the first convex surface D11.

[0083] As a structural example, such as Figure 5a and Figure 5b As shown, the valve body 1 is provided with a positioning hole S1, and the positioning pin S2 is disposed on the sealing structure 3. In one embodiment, the positioning hole S1 and the threaded hole P1 of the valve body 1 are both located on the first convex surface D11 of the valve body 1. The positioning process and the threaded connection process have higher compatibility and can improve the convenience of threaded connection operation.

[0084] In other embodiments, the positioning hole S1 of the valve body 1 may also be located on the first end face D1 of the valve body 1. When the sealing structure 3 is assembled on the valve body 1, the positioning pin S2 on the sealing structure 3 is inserted into the positioning hole S1 to achieve positioning.

[0085] It is understandable that the sealing structure 3 and the valve body 1 can also be positioned by the shape design of the first convex surface D11 and the sealing concave surface M11. For example, the irregularly shaped first convex surface D11 and the sealing concave surface M11 can only achieve the positioning and cooperation between the sealing structure 3 and the valve body 1 when they are opposite each other at a certain angle.

[0086] Figure 6a and Figure 6b Another waterproof and breathable valve 10 is illustrated, differing from the aforementioned waterproof and breathable valve 10 in that its sealing structure 3 is in the shape of a cover plate. Compared to... Figure 2b and Figure 2c 3. A cap-type sealing structure, such as Figure 6b As shown, when the cover-shaped sealing structure 3 is installed on the valve body 1, the sealing structure 3 contacts the first convex surface D11 of the valve body 1 to cover the port of the first vent hole K1. The first end face D1 and the circumferential side face D3 of the valve body 1 are exposed.

[0087] Figure 6a and Figure 6b In the waterproof and breathable valve 10 shown, the sealing structure 3 needs to contact the first convex surface T1 of the valve body 1, which simplifies the assembly operation. The sealing structure 3 uses less material, which also reduces costs.

[0088] Figure 7a and Figure 7b An example of a sealing structure 3 in the form of a sealing membrane is provided. This sealing structure 3 can be adhesively fixed to the valve body 1 and seal the first vent hole K1. The sealing structure 3 is a sealing membrane adhered to the outer surface of the valve body 1. The adhesive area between the sealing structure 3 and the valve body 1 at least surrounds the port of the first vent hole K1 located on the outer surface of the valve body 1, thereby providing a good sealing effect for the first vent hole K1 and preventing gas from entering the first vent hole K1 through the gap between the sealing structure 3 and the valve body 1. When the waterproof vent valve 10 is activated, the sealing structure 3 can be torn off or destroyed, allowing the first vent hole K1 to communicate with the external environment.

[0089] In one embodiment, such as Figure 7a and Figure 7b As shown, the sealing structure 3 in the form of a sealing film is bonded to the first convex surface D11 of the valve body 1. The sealing structure 3 can be bonded to the entire surface of the first convex surface D11. Each first vent hole K1 located at the port of the first convex surface D11 is sealed by the bonded area. The different first vent holes K1 located at the ports of the first convex surface D11 are independent of each other. Alternatively, the sealing structure 3 can be bonded to a portion of the first convex surface D11, with the bonded area surrounding the port of the first vent hole K1 located on the outer surface of the valve body 1. Figure 7b A ring-shaped adhesive area N is illustrated, which can seal all the first vent holes K1. The different first vent holes K1 are connected between the ports of the first convex surface D11. The sealing structure 3 in the form of a sealing membrane not only provides a good sealing effect, but also makes the operation of bonding and removing the seal more convenient. The sealing structure 3 in the form of a sealing membrane is thinner, which helps to reduce the volume occupied by the waterproof vent valve 10.

[0090] In one embodiment, the sealing structure 3 in the form of a sealing membrane includes a membrane structure 31 with an integral structure and a handle 32. The membrane structure 31 is used to bond the valve body 1 and cover the port of the first vent hole K1 located on the outer surface of the valve body 1. The handle 32 protrudes from the edge of the membrane structure 31, making it convenient for workers to remove the sealing structure 3 by lifting the handle 32.

[0091] To improve the dehumidification effect of the waterproof and breathable valve 10, such as Figure 8The waterproof and breathable valve 10 shown also includes a reversible moisture-absorbing material 6 housed within a receiving cavity Q. This reversible moisture-absorbing material 6 is spaced between a waterproof and breathable membrane 2 and a second vent K2. The reversible moisture-absorbing material 6 possesses bidirectional reversibility in absorbing and releasing moisture. Moisture entering the valve body 1 through the first vent K1 is initially filtered by the waterproof and breathable membrane 2, reducing its humidity. Moisture that has passed through the waterproof and breathable membrane 2 can be absorbed by the reversible moisture-absorbing material 6, further reducing its humidity and making the gas entering the device through the second vent K2 drier. The reversible moisture-absorbing material 6 can release the absorbed moisture through heating or other methods, thus achieving reuse. Compared to traditional desiccants used for moisture absorption, the reversible moisture-absorbing material 6 is reusable, making it more suitable for outdoor applications requiring long-term moisture protection, and offering higher safety and environmental friendliness.

[0092] Among them, the reversible moisture-absorbing material 6 can be selected from moisture-absorbing materials based on reversible hydrophilic-hydrophobic conversion, cobalt chloride-based inorganic humidity-sensitive materials, temperature-sensitive interpenetrating network hydrogel / modified bentonite composite water-absorbing and water-retaining materials, anti-condensation humidity-regulating sheets, etc., according to different application scenarios and application requirements. The reversible moisture-absorbing material 6 is layered according to the shape of the internal structure of the valve body 1.

[0093] like Figure 8 As shown, along the direction from the first vent K1 to the second vent K2, there is a gap between the reversible moisture-absorbing material 6 and the waterproof breathable membrane 2, so they do not come into contact. Moisture passing through the waterproof breathable membrane 2 can be buffered and dried within this gap, thus improving the moisture absorption effect of the reversible moisture-absorbing material 6.

[0094] Specifically, along the direction from the first vent K1 to the second vent K2, the receiving cavity Q of the valve body 1 includes a first chamber Q1 and a second chamber Q2 that are connected. The waterproof and breathable membrane 2 is housed in the first chamber Q1, and the reversible moisture-absorbing material 6 is housed in the second chamber Q2.

[0095] Along a direction perpendicular to the first vent K1 and pointing to the second vent K2, the radial dimension of the first chamber Q1 is smaller than that of the second chamber Q2. A stepped surface J is formed between the first chamber Q1 and the second chamber Q2, facing away from the waterproof and breathable membrane 2. The radial dimension of the reversible moisture-absorbing material 6 is larger than that of the first chamber Q1. Along the direction from the first vent K1 to the second vent K2, the projection of the reversible moisture-absorbing material 6 into the first chamber Q1 can completely cover and extend beyond the range of the first chamber Q1, allowing the reversible moisture-absorbing material 6 to more comprehensively absorb moisture that permeates through the waterproof and breathable membrane 2. The reversible moisture-absorbing material 6 is housed within the second chamber Q2, and the stepped surface J between the first chamber Q1 and the second chamber Q2 prevents the reversible moisture-absorbing material 6 from entering the first chamber Q1 and contacting the waterproof and breathable membrane 2.

[0096] In one specific embodiment, along the direction from the first vent K1 to the second vent K2, the thickness of the waterproof and breathable membrane 2 is less than the height of the first chamber Q1. The waterproof and breathable membrane 2 is attached to the inner wall of the first chamber Q1 connected to the first vent K1. The reversible moisture-absorbing material 6 can be attached to the step surface J or to the inner wall of the second chamber Q2 away from the first chamber Q2.

[0097] like Figure 9a and Figure 9b The exploded view shown is of a waterproof and breathable valve 10. The second end face D2 of the outer surface of the valve body 1 is used to seal the outer surface of the connected device. In order to improve the sealing performance of the connection between the valve body 1 and the device, a second sealing ring 7 is provided between the second end face D2 and the device. At least one of the second end face D2 and the outer surface of the device is provided with a second sealing groove V2, which is used to accommodate the second sealing ring 7.

[0098] The second sealing ring 7 surrounds the second convex surface D21, and the second vent hole K2 is located at the port on the outer surface of the valve body 1. The second sealing ring 7 can be pressed together between the valve body 1 and the equipment to further prevent external gases from entering the equipment through the gap between the equipment and the valve body 1. The second sealing ring 7 is made of elastic materials such as silicone or rubber, which can elastically deform under pressure to improve the sealing effect.

[0099] In one embodiment, along the direction from the first end face D1 to the second end face D2, the height of the second sealing ring 7 is greater than the groove depth of the second sealing groove V3. When the second sealing ring 7 is housed in the second sealing groove V2, the second sealing ring 7 can be exposed on the surface where the second sealing groove V2 is located.

[0100] Figure 9c The example illustrates a partial structure of the waterproof and breathable valve 10 installed on the housing 20 of the equipment. When the waterproof and breathable valve 10 is assembled into the breathable channel W of the housing 20, the second end face D2 of the valve body 1 faces the outer surface of the housing 20. The second sealing ring 7 can be pressed tightly against the valve body 1 and the housing 20 respectively to achieve a seal. The second sealing groove V2 can increase the stability and sealing effect of the second sealing ring 7.

[0101] In summary, the waterproof and breathable valve 10 provided in this embodiment can achieve waterproof and breathable effects, helping the photovoltaic inverter 100 or other equipment to achieve internal and external pressure balance and maintain the dryness and safety of the equipment. When the equipment is not in use, the sealing structure 3 included in the waterproof and breathable valve 10 can block the first vent K1, blocking the passage for external gas to enter the valve body 1, fundamentally preventing external moisture from intruding into the equipment. When the equipment is in use, simply removing or destroying the sealing structure 3 to expose the first vent K1 allows the waterproof and breathable valve 10 to function, achieving airflow balance between internal and external air pressure. When the equipment is in use, external moisture enters the equipment through the waterproof and breathable valve 10, and the equipment can activate its own active dehumidification device to dry the air. This waterproof and breathable valve 10 has a simple structure and high practicality in application, and can be widely used in equipment dehumidification in outdoor environments.

[0102] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A waterproof and breathable valve, characterized in that, The waterproof and breathable valve includes a valve body, a waterproof and breathable membrane, and a sealing structure; The valve body includes a receiving cavity, a first vent hole, and a second vent hole, wherein the first vent hole and the second vent hole are respectively connected to the outer surface of the valve body and the receiving cavity; The waterproof and breathable membrane is housed within the receiving cavity, and the waterproof and breathable membrane isolates the first vent and the second vent. The sealing structure is sealed to the outer surface of the valve body, and the sealing structure covers the port of the first vent hole located on the outer surface of the valve body.

2. The waterproof and breathable valve as described in claim 1, characterized in that, The sealing structure is a sealing cover, and a first sealing ring is provided between the sealing cover and the valve body. The first sealing ring surrounds the port of the first vent located on the outer surface of the valve body.

3. The waterproof and breathable valve as described in claim 2, characterized in that, At least one of the surface of the sealing cap facing the valve body and the surface of the valve body facing the sealing cap is provided with a first sealing groove, the first sealing groove being used to accommodate the first sealing ring.

4. The waterproof and breathable valve as described in claim 2, characterized in that, The outer surface of the valve body includes a first convex surface and a first end face surrounding the first convex surface. Along the arrangement direction of the first vent hole and the second vent hole, the first convex surface protrudes from the first end face, and the first vent hole connects the first convex surface with the receiving cavity. The surface of the sealing cap facing the valve body includes a sealing concave surface and a sealing inner wall surrounding the sealing concave surface, wherein the sealing concave surface is recessed relative to the sealing inner wall in a direction away from the valve body; The sealing concave surface is used to contact the first convex surface, the sealing inner wall is used to contact the first end face, and the first sealing ring is accommodated between the first convex surface and the sealing concave surface.

5. The waterproof and breathable valve as described in claim 4, characterized in that, The outer surface of the valve body includes a circumferential side surface surrounding the first end face, and the sealing cover includes a circumferential inner wall surrounding the sealing inner wall, the circumferential inner wall surrounding the circumferential side surface; The circumferential side includes a protruding boss, and the circumferential inner wall includes a groove for engaging with the boss.

6. The waterproof and breathable valve as described in claim 4, characterized in that, The valve body includes a threaded hole, the opening of which is located on the first convex surface; The sealing cap includes a through hole that extends through the sealing cap along a direction opposite to the sealing concave surface and the first convex surface. The through hole is used for threaded connectors to pass through and connect with the threaded hole so that the sealing cap is fixed to the valve body.

7. The waterproof and breathable valve as described in claim 6, characterized in that, The first convex surface includes one of a positioning hole and a positioning post, and the sealing concave surface includes the other of a positioning hole and a positioning post. The positioning post is used to be inserted into the positioning hole along the direction opposite to the sealing concave surface and the first convex surface.

8. The waterproof and breathable valve as described in claim 1, characterized in that, The sealing structure is a sealing membrane, which is bonded to the outer surface of the valve body. The bonding area between the sealing membrane and the valve body at least surrounds the port of the first vent located on the outer surface of the valve body.

9. The waterproof and breathable valve as described in claim 8, characterized in that, The sealing membrane includes a membrane structure with an integral structure and a handle. The membrane structure is used to adhere to the valve body and cover the port of the first vent located on the outer surface of the valve body. The handle protrudes from the edge of the membrane structure.

10. The waterproof and breathable valve according to any one of claims 1-9, characterized in that, The waterproof and breathable valve also includes a reversible moisture-absorbing material housed within the receiving cavity, the reversible moisture-absorbing material being spaced apart between the waterproof and breathable membrane and the second vent.

11. The waterproof and breathable valve as described in claim 10, characterized in that, Along the direction from the first vent to the second vent, the receiving cavity includes a first chamber and a second chamber that are connected to each other. The waterproof and breathable membrane is housed in the first chamber, and the reversible moisture-absorbing material is housed in the second chamber. Along a direction perpendicular to the first vent and pointing to the second vent, the radial dimension of the first chamber is smaller than the radial dimension of the second chamber, a stepped surface is formed between the first chamber and the second chamber that is away from the waterproof and breathable membrane, and the radial dimension of the reversible moisture-absorbing material is larger than the radial dimension of the first chamber.

12. A photovoltaic inverter, characterized in that, The photovoltaic inverter includes a housing and at least one waterproof and breathable valve as described in any one of claims 1-11; The housing includes at least one ventilating channel connecting the inside and outside of the housing. Each ventilating channel is equipped with a waterproof and ventilating valve. The first vent is connected to the external space of the housing, and the second vent is connected to the internal space of the housing.

13. The photovoltaic inverter as described in claim 12, characterized in that, The outer surface of the valve body includes a second convex surface and a second end face surrounding the second convex surface. Along the arrangement direction of the first vent hole and the second vent hole, the second convex surface protrudes from the second end face. The second vent hole connects the second convex surface with the receiving cavity. The second end face is used to seal and connect the outer surface of the housing.

14. The photovoltaic inverter as described in claim 13, characterized in that, A second sealing ring is provided between the second end face and the housing, and the second sealing ring surrounds the second convex surface.

15. The photovoltaic inverter as described in claim 14, characterized in that, At least one of the second end face and the outer surface of the housing is provided with a second sealing groove, which is used to accommodate the second sealing ring.

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