Photovoltaic inverter output terminal intelligent moisture-proof device

Abstract

This invention relates to the field of output terminal moisture protection technology, and discloses an intelligent moisture-proof device for photovoltaic inverter output terminals, comprising: a sealed protective shell with an opening at the bottom and a sealing groove around the opening, a sealing gasket embedded in the sealing groove, mounting holes for matching bolts around the perimeter of the sealed protective shell, and an alarm, controller, and semiconductor cooler mounted on the top. The inner cavity of the sealed protective shell has a temperature-conducting inclined plate that fits against the semiconductor cooler, and a temperature and humidity detector is installed on the inner wall. The outer surface has a wiring hole with a sealing ring, an exhaust hole with an exhaust fan, and a sealing groove. A sealing block and a sealing outer plate are respectively fitted into the inner cavity of the sealing groove and the exhaust hole. This device can form a closed-loop, surface-sealed barrier, effectively preventing external moisture from intruding into the inverter output terminal area, avoiding terminal oxidation and degradation of insulation performance due to moisture.

Description

Technical Field

[0001] This invention relates to the field of output terminal moisture protection technology, specifically to an intelligent moisture protection device for photovoltaic inverter output terminals. Background Technology

[0002] The stable operation of a photovoltaic power plant grid-connected power generation system highly depends on the reliable operation of the inverter equipment. As the core connection component for power output, the operating status of the inverter output terminal directly determines the power generation efficiency and grid connection security of the power plant. Under complex outdoor conditions of high humidity and large temperature fluctuations, moisture protection of the output terminal has always been a core focus in the operation and maintenance and equipment optimization process of the power plant.

[0003] Existing technologies for moisture protection of inverter output terminals mostly employ conventional housing structures combined with scattered sealing components to achieve gap sealing. These methods rely solely on simple gasket pressing for localized sealing, failing to form a closed-loop, surface-sealed barrier after the equipment is installed and fixed. External moisture can easily penetrate the terminal area through assembly gaps, causing oxidation of the terminal metal contacts and a decline in insulation performance, thus affecting the equipment's operational stability and power generation efficiency. Current technologies primarily treat moisture within the terminal area through static adsorption with hygroscopic materials or natural ventilation, failing to rapidly condense moisture in the air. The condensed water also lacks a smooth flow and drainage structure, easily leading to secondary evaporation after retention. This makes it difficult to fundamentally maintain a dry environment in the terminal area and achieve a continuous and stable moisture-proof effect. Therefore, an intelligent moisture-proof device for photovoltaic inverter output terminals is proposed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an intelligent moisture-proof device for the output terminals of photovoltaic inverters, thereby solving the aforementioned technical problems of oxidation and decreased insulation performance of terminal metal contacts, as well as the easy occurrence of secondary volatilization after water retention.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an intelligent moisture-proof device for the output terminals of a photovoltaic inverter, comprising: The sealed protective shell has an opening at the bottom and a sealing groove around the opening. A sealing gasket is added to the inner cavity of the sealing groove. Mounting holes for bolts are provided around the sealed protective shell. An alarm, a controller and a semiconductor cooler are installed on the top of the sealed protective shell. A temperature-conducting inclined plate is set at the bottom of the inner cavity of the sealed protective shell and is attached to the semiconductor cooler. The contact surface of the temperature-conducting inclined plate is designed with low sides for flow guidance. A through-type collection groove is opened on the inner side wall of the sealed protective shell. The contact surfaces of the temperature-conducting inclined plate enter the inner cavity of the collection groove. A flow guide plate with high middle and low sides is installed at the bottom of the inner cavity of the collection groove. Temperature and humidity detectors are also added around the inner wall of the sealed protective shell. The wiring hole is located on the outside of the sealed protective shell, and a sealing ring is embedded in the inner wall of the wiring hole. An exhaust hole is also provided on the outside of the sealed protective shell, and an exhaust fan is installed in the inner cavity of the exhaust hole. A sealing groove is provided at the outer end of the collection groove, and the inner cavities of the sealing groove and the vent hole are respectively sealed and fitted with a sealing block and a sealing outer plate.

[0006] During the standby deployment phase, the sealed protective shell is fixed to the outside of the photovoltaic inverter's output terminal area through the mounting holes. The sealing gasket fits snugly against the inverter housing via the sealing groove, forming a closed protective space. Wiring passes through the wiring holes into the interior of the sealed protective shell, where the sealing ring fits snugly against the outer wall of the wiring to achieve a seal. The sealing outer plate is sealed against the inner cavity of the vent, and the sealing block is sealed against the inner cavity of the sealing groove. After deployment is complete, the device is powered on and enters standby monitoring mode.

[0007] During the real-time monitoring and judgment phase, the temperature and humidity detector collects temperature and humidity data from the inner cavity of the sealed protective shell in real time and transmits the collected temperature and humidity data to the controller. The controller compares the received temperature and humidity data with the preset humidity threshold and outputs corresponding control commands based on the comparison result.

[0008] During intelligent dehumidification operation, when the controller determines that the current humidity exceeds a preset threshold, it outputs a start command, simultaneously controlling the semiconductor cooler and exhaust fan to start operation. The cooling energy generated by the semiconductor cooler is transferred to the inner cavity of the sealed protective shell through a temperature-conducting inclined plate, causing water vapor in the air inside the cavity to condense into liquid water on the surface of the temperature-conducting inclined plate. The condensed liquid water flows along the guide surface of the temperature-conducting inclined plate into the inner cavity of the collection tank, and then is discharged to the outside of the sealed protective shell through the guide structure of the guide plate along the sealing groove. When the exhaust fan is running, it drives the air circulation inside the sealed protective shell, accelerating the condensation of water vapor and the reduction of humidity inside the cavity, while simultaneously expelling the air inside the cavity through the exhaust port.

[0009] When the device returns to standby mode after shutdown, if the controller determines that the current humidity has fallen below the preset threshold, the controller will output a stop command to stop the operation of the semiconductor cooler and the exhaust fan. The device will then return to standby monitoring mode, with only the temperature and humidity detector and the controller maintaining monitoring operation.

[0010] During the abnormal alarm handling phase, when the controller determines that the humidity continues to exceed the preset threshold and the dehumidification operation cannot reduce the humidity, the controller outputs an alarm command to activate the alarm and issue a warning signal to remind maintenance personnel to conduct on-site inspection and fault handling.

[0011] Preferably, the inner wall of the sealing groove is provided with a limiting side groove, and both sides of the sealing block are equipped with a limiting side block that is slidably adapted to the limiting side groove.

[0012] During the installation or removal of the sealing block, the limiting side block slides along the limiting side groove, guiding the sealing block to accurately embed into the inner cavity of the sealing groove, completing the fit and seal. During removal, the limiting side block slides in the opposite direction along the limiting side groove, causing the sealing block to smoothly disengage from the sealing groove without any offset or jamming throughout the process.

[0013] Preferably, a lifting electric rod is embedded in the top center of the sealed protective shell, and a connecting frame is installed at the lifting end of the lifting electric rod, and the connecting frame is connected to the sealing block and the sealing outer plate respectively.

[0014] The controller outputs control commands to the lifting electric mast, whose rising end drives the connecting frame to move up and down. When it is necessary to open the vent and sealing groove, the lifting electric mast raises the connecting frame, simultaneously causing the sealing outer plate and sealing block to disengage from the vent and sealing groove. When sealing is required, the lifting electric mast lowers the connecting frame, simultaneously causing the sealing outer plate and sealing block to precisely embed into the inner cavity of the vent and sealing groove, completing the sealing fit.

[0015] Preferably, the inner cross-section of the wiring hole is a two-stage stepped type, with the large-diameter hole of the wiring hole facing inwards from the sealing and protective shell, and the small-diameter hole of the wiring hole facing outwards from the sealing and protective shell.

[0016] The sealing ring is inserted into the inner cavity of the wiring hole from the inside of the sealing protective shell. The two-stage stepped hole wall forms an axial limit, preventing the sealing ring from coming out of the sealing protective shell. When wiring is installed, the two-stage stepped wiring hole provides guidance for the wiring, guiding the wiring smoothly through the wiring hole into the inner cavity of the sealing protective shell without any jamming or deviation.

[0017] Preferably, the sealing ring is fitted into the inner wall of the small-diameter hole of the wiring hole, and the inner wall of the sealing ring is uniformly provided with concave lips that are in the same direction and gradually shrink inward, and the tips of the concave lips all face the insertion direction.

[0018] As the wire passes through the inner cavity of the sealing ring in the insertion direction, the tip of the concave lip fits tightly against the outer wall of the wire, and each set of concave lips sequentially forms a continuous sealing barrier with the outer wall of the wire. When the wire undergoes axial movement or radial displacement, the concave lip elastically deforms synchronously with the deformation of the wire, maintaining a tight fit with the outer wall of the wire.

[0019] Preferably, a closed-loop first elastic compensation cavity is provided between adjacent concave lips on the sealing ring, and a closed-loop dirt collection groove is provided at the root of the outer concave lip on the sealing ring.

[0020] After the wiring is installed, the first elastic compensation cavity undergoes elastic compression synchronously with the deformation of the concave lip, continuously providing radial contact force to the concave lip and compensating for the contact gap between the wiring and the concave lip. Dust and impurities on the wiring surface are intercepted and collected by the dirt collection tank as the wiring is inserted, preventing impurities from entering the contact surface of the inner concave lip.

[0021] Preferably, a limiting ring is embedded in the inner wall of the large-diameter hole of the wiring hole, and the inner end face of the limiting ring is in contact with the sealing ring.

[0022] After the sealing ring is positioned by being embedded in the inner cavity of the wiring hole, the limiting ring is embedded in the inner wall of the large-diameter hole of the wiring hole, so that the inner end face of the limiting ring is tightly fitted with the end face of the sealing ring, forming an axial inner limit on the sealing ring and preventing the sealing ring from moving or shifting into the inner cavity of the sealing protective shell.

[0023] Preferably, the outer circumferential surface of the limiting ring is uniformly equipped with limiting balls, and the inner wall of the large-diameter hole of the wiring hole is uniformly provided with limiting grooves that are adapted to engage with the limiting balls.

[0024] When the retaining ring is inserted into the large-diameter cavity of the wiring hole, the retaining ball is pushed into the inner cavity of the retaining groove as the retaining ring is pushed forward, thus completing the retaining ring's locking and fixing. When disassembling the retaining ring, apply axial tension to dislodge the retaining ball from the retaining groove, and the retaining ring can be smoothly removed.

[0025] Preferably, the mating surfaces of the sealing gasket and the sealing groove are symmetrically provided with tightening ribs, and the tightening ribs are all semi-circular in design.

[0026] When the sealing protective shell is fixed to the inverter housing through the mounting hole, the sealing gasket is pressed between the sealing groove and the inverter housing. The tightening ribs undergo elastic deformation first, and fit tightly with the mounting surface of the inverter housing to form a continuous linear sealing barrier. At the same time, the clamping force is evenly transmitted to the entire mating surface of the sealing gasket.

[0027] Preferably, the sealing gasket is uniformly equipped with anti-detachment positioning teeth on its outer side, and the inner sidewall of the sealing groove is uniformly provided with snap-fit ​​grooves that are adapted to engage with the anti-detachment positioning teeth. A honeycomb-shaped second elastic compensation cavity is uniformly provided in the circumferential direction inside the sealing gasket, and the second elastic compensation cavity is a closed-loop hexagonal structure. Flexible reinforcing ribs are connected between adjacent second elastic compensation cavities.

[0028] When the sealing gasket is embedded in the inner cavity of the sealing groove, the anti-dislodgement positioning teeth engage with the snap-fit ​​grooves on the inner sidewall of the sealing groove, completing the positioning and fixing of the sealing gasket and preventing it from shifting or falling off during installation. When the sealing gasket is compressed, the second elastic compensation cavity undergoes independent elastic deformation, adaptively adapting to the flatness error of the mounting surface. The flexible reinforcing ribs deform synchronously, ensuring the structural stability of the sealing gasket during deformation.

[0029] Compared with the prior art, the present invention provides an intelligent moisture-proof device for the output terminals of a photovoltaic inverter, which has the following beneficial effects: This intelligent moisture-proof device for the output terminals of a photovoltaic inverter features a sealed protective shell with a sealing gasket embedded in the sealing groove at the opening. This creates a closed-loop, tightly sealed surface barrier when the device is fixed through the mounting holes, effectively preventing external moisture from entering the inverter's output terminal area and avoiding problems such as oxidation and decreased insulation performance of the terminals due to moisture.

[0030] The structure of the semiconductor cooler and the temperature-conducting inclined plate can quickly condense the moisture in the air in the terminal area. With the flow-guiding design of the temperature-conducting inclined plate, the condensate is smoothly guided into the collection tank and then discharged through the guide plate, avoiding the problem of secondary moisture evaporation caused by the retention of condensate.

[0031] The temperature and humidity detector can collect environmental parameters of the sealed protective shell cavity in real time, and work with the controller to achieve precise control of the device's operating status. In abnormal conditions, the alarm will provide timely warnings. The exhaust fan and exhaust vent can accelerate the air circulation in the cavity, improve dehumidification efficiency, and ensure a stable internal environment.

[0032] The sealing ring embedded in the inner cavity of the wiring hole can form a stable radial seal for the through wiring. The sealing fit structure of the sealing groove and sealing block, and the vent hole and sealing outer plate can form a fully enclosed protection for the non-wiring openings of the device, comprehensively improving the overall sealing and protection performance of the device. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the rising of the connecting frame and its connection structure according to the present invention; Figure 3 This is a cross-sectional view of the separated structure of the sealing and protective shell of the present invention; Figure 4 This is a schematic diagram of the exhaust port, sealing groove, and their connection structure of the present invention; Figure 5 This is a cross-sectional view of the wiring hole and its connection structure of the present invention; Figure 6 This is a partial cross-sectional view of the sealing gasket of the present invention and a schematic diagram of its connection structure.

[0034] In the diagram: 1. Sealed protective shell; 2. Sealing groove; 3. Sealing gasket; 4. Mounting hole; 5. Alarm; 6. Controller; 7. Semiconductor cooler; 8. Temperature guiding inclined plate; 9. Collection tank; 10. Flow guide plate; 11. Temperature and humidity detector; 12. Wiring hole; 13. Sealing ring; 14. Exhaust port; 15. Exhaust fan; 16. Sealing outer plate; 17. Sealing groove; 18. Limiting side groove; 19. Sealing block; 20. Limiting side block; 21. Lifting electric rod; 22. Connecting frame; 23. Concave lip; 24. Sludge collection tank; 25. First elastic compensation cavity; 26. Limiting retaining ring; 27. Limiting retaining ball; 28. Limiting retaining groove; 29. ​​Tightening rib; 30. Second elastic compensation cavity; 31. Flexible reinforcing rib; 32. Anti-detachment positioning tooth. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] This invention provides a technical solution: an intelligent moisture-proof device for the output terminals of a photovoltaic inverter, comprising: (see details) Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The sealed protective shell 1 has an opening at the bottom and a sealing groove 2 around the opening. A sealing gasket 3 is added to the inner cavity of the sealing groove 2. Mounting holes 4 that are compatible with bolts are opened around the sealed protective shell 1. An alarm 5, a controller 6 and a semiconductor cooler 7 are installed on the top of the sealed protective shell 1. A temperature-conducting inclined plate 8 is set at the bottom of the inner cavity of the sealed protective shell 1, and the temperature-conducting inclined plate 8 is in contact with the semiconductor cooler 7. The contact surface of the temperature-conducting inclined plate 8 is designed with low sides for flow guidance, and a through-type collection groove 9 is opened on the inner side wall of the sealed protective shell 1. The contact surfaces of the temperature-conducting inclined plate 8 enter the inner cavity of the collection groove 9, and a flow guide plate 10 with high middle and low sides is installed at the bottom of the inner cavity of the collection groove 9. Temperature and humidity detectors 11 are also added around the inner wall of the sealed protective shell 1. Wiring hole 12 is opened on the outside of the sealed protective shell 1, and a sealing ring 13 is embedded in the inner wall of wiring hole 12. An exhaust hole 14 is also opened on the outside of the sealed protective shell 1, and an exhaust fan 15 is installed in the inner cavity of the exhaust hole 14. The sealing groove 17 is opened at the outer end of the collection groove 9, and the sealing groove 17 and the inner cavity of the exhaust hole 14 are respectively sealed and fitted with the sealing block 19 and the sealing outer plate 16.

[0037] The sealing protective shell 1, sealing groove 2, sealing gasket 3, wiring hole 12, sealing ring 13, sealing outer plate 16, sealing groove 17, and sealing block 19 work together to form a fully enclosed passive sealing barrier, effectively preventing external moisture or dust from entering the protected space. Simultaneously, the coordinated operation of the semiconductor cooler 7, temperature-conducting inclined plate 8, and exhaust fan 15 actively reduces the air humidity within the protected space, fundamentally preventing condensation or oxidation corrosion on the inverter output terminals, ensuring stable and reliable operation of the inverter output terminals, and constructing a dual protection system combining passive full-sealing protection and active intelligent dehumidification.

[0038] The system automatically monitors and regulates humidity without manual intervention. Humidity data within the protected space is collected in real-time by a temperature and humidity detector 11. The controller 6 automatically controls the start and stop of the dehumidification components based on the humidity comparison results, significantly reducing the device's energy consumption. Simultaneously, the alarm 5 provides timely warnings of abnormal conditions, facilitating rapid response and fault handling by maintenance personnel. This effectively reduces maintenance difficulty and frequency, extends the lifespan of the device and inverter output terminals, and achieves fully intelligent closed-loop control of the dehumidification process.

[0039] Through the flow guiding design of the temperature guiding inclined plate 8 and the coordinated cooperation of the collection tank 9 and the guide plate 10, the condensed liquid water can be smoothly and completely discharged to the outside of the sealed protective shell 1, avoiding the accumulation of condensate in the protective space and causing secondary moisture problems. At the same time, the overall sealing performance of the sealed protective shell 1 is not damaged throughout the process, ensuring the continuous and stable operation of the dehumidification process and optimizing the whole-path flow guiding and discharge structure of condensate.

[0040] The device can be quickly and easily installed using only the mounting hole 4, making it compatible with the output terminal areas of mainstream photovoltaic inverters. Furthermore, the detachable sealing design of the outer sealing plate 16 and the sealing block 19 allows for flexible sealing and maintenance of the vent 14 and the sealing groove 17. This ensures overall device protection while reducing the difficulty of later maintenance. The device boasts strong overall adaptability and convenient installation, requiring no modification to the original structure and wiring of the photovoltaic inverter.

[0041] Please see Figure 2 and Figure 4 The inner sidewall of the sealing groove 17 is provided with a limiting side groove 18, and the two sides of the sealing block 19 are equipped with limiting side blocks 20 that are slidably adapted to the limiting side groove 18.

[0042] The sliding fit between the limiting side groove 18 and the limiting side block 20 provides precise guidance and limitation for the installation and removal of the sealing block 19, preventing misalignment during installation and ensuring complete sealing contact between the sealing block 19 and the sealing groove 17, thus eliminating sealing failure caused by misalignment. Simultaneously, it effectively limits the radial movement of the sealing block 19, preventing displacement and detachment due to vibration during device operation, and improving the long-term operational stability of the sealing structure.

[0043] A lifting electric rod 21 is embedded in the top center of the sealed protective shell 1, and a connecting frame 22 is installed at the lifting end of the lifting electric rod 21. The connecting frame 22 is connected to the sealing block 19 and the sealing outer plate 16 respectively.

[0044] By linking the lifting electric rod 21 with the connecting frame 22, the sealing outer plate 16 and the sealing block 19 can be opened and closed synchronously and automatically, eliminating the need for manual disassembly and installation, greatly improving the ease of operation of the device. At the same time, it ensures that the opening and closing actions of the sealing outer plate 16 and the sealing block 19 are synchronized, avoiding uneven force on the sealing surface caused by unilateral opening and closing. It can also be integrated with the dehumidification operation process to achieve intelligent linkage of opening and closing, opening the sealing outer plate 16 synchronously when the exhaust fan 15 starts and automatically completing the sealing and plugging when the machine stops, further improving the sealing and protection performance and the level of intelligence of the device.

[0045] Please see Figure 5 The inner cross-section of the wiring hole 12 is a two-stage stepped type, and the large diameter hole of the wiring hole 12 faces the inside of the sealing and protective shell 1, while the small diameter hole of the wiring hole 12 faces the outside of the sealing and protective shell 1.

[0046] The two-stage stepped wiring hole 12 structure provides stable axial limiting support for the sealing ring 13, preventing axial movement and outward dislodgement of the sealing ring 13 during wiring installation and device operation vibration, thus ensuring the stability of the sealing ring 13's installation position. Simultaneously, the design of the large-diameter hole facing inwards towards the sealing protective shell 1 and the small-diameter hole facing outwards reduces the external opening size for wiring installation, further reducing the path for external moisture intrusion and improving the sealing and protection performance of the wiring location.

[0047] The sealing ring 13 is fitted into the inner wall of the small-diameter hole of the wiring hole 12, and the inner wall of the sealing ring 13 is uniformly provided with concave lips 23 that are in the same direction and gradually shrink inward, and the tips of the concave lips 23 are all facing the insertion direction.

[0048] Multiple sets of concave lips 23, which converge inwards in the same direction, form a series of continuous sealing barriers, significantly extending the path for moisture intrusion and effectively preventing external moisture from entering the inner cavity of the sealing protective shell 1 through the gap between the wiring and the sealing ring 13. The design of the lip tip facing the insertion direction makes wiring insertion smoother, and at the same time, the lip can form a reverse locking force when the wiring comes out in the opposite direction, further improving the fit and sealing performance, preventing the formation of sealing gaps caused by wiring movement, and ensuring the long-term sealing reliability of the wiring position.

[0049] A closed-loop first elastic compensation cavity 25 is provided between adjacent concave lips 23 on the sealing ring 13, and a closed-loop dirt collection groove 24 is provided at the root of the concave lips 23 on the outside of the sealing ring 13.

[0050] The closed-loop first elastic compensation cavity 25 adaptively compensates for the elastic deformation of the concave lip 23, providing a stable contact force between the lip and the wiring surface. This solves the problem of lip elasticity decay or poor contact after long-term use, adapting to tolerance changes in the wiring outer diameter and vibration during operation, ensuring long-term stability of the seal. The dirt collection groove 24 effectively traps dust or impurities brought in by the wiring surface, preventing impurities from scratching the contact surface of the concave lip 23 and forming sealing gaps, extending the service life of the sealing ring 13, and further improving the sealing and protective performance.

[0051] A limiting ring 26 is embedded in the inner wall of the large-diameter hole of the wiring hole 12, and the inner end face of the limiting ring 26 is in contact with the sealing ring 13.

[0052] The two-stage stepped structure of the retaining ring 26 and the wiring hole 12 forms a bidirectional axial limit for the sealing ring 13. The stepped structure prevents the sealing ring 13 from coming out, and the retaining ring 26 prevents the sealing ring 13 from moving inward. This completely eliminates the problem of axial displacement of the sealing ring 13 during wiring and device operation, ensuring the accuracy and stability of the installation position of the sealing ring 13 and avoiding sealing failure caused by displacement of the sealing ring 13.

[0053] Limiting balls 27 are evenly installed on the outer circumference of the limiting ring 26, and limiting grooves 28 that are adapted to engage with the limiting balls 27 are evenly opened on the inner wall of the large diameter hole of the wiring hole 12.

[0054] The locking ball 27 and the locking groove 28 engage and engage to achieve quick locking, fixing, and disassembly of the locking ring 26 without the need for additional fasteners, making installation and maintenance convenient and efficient. Simultaneously, it effectively limits the axial movement and circumferential rotation of the locking ring 26, preventing it from loosening due to vibration during device operation. This ensures long-term stable limiting and support for the sealing ring 13, further improving the operational reliability of the sealing structure.

[0055] Please see Figure 6 The mating surfaces of the sealing gasket 3 and the sealing groove 2 are symmetrically provided with tightening ribs 29, and the tightening ribs 29 are all semi-circular in design.

[0056] The semi-circular tightening ribs 29 form multiple continuous linear sealing barriers when the sealing gasket 3 is pressed, significantly improving the surface sealing fit and effectively adapting to the flatness error of the inverter housing mounting surface, avoiding sealing gaps caused by localized poor fit. Simultaneously, the tightening ribs 29 evenly distribute the clamping force, preventing permanent deformation of the sealing gasket 3 due to excessive localized pressure, extending the service life of the sealing gasket 3, and ensuring the long-term sealing reliability of the sealing protective shell 1 and the inverter housing mating surface.

[0057] The sealing gasket 3 is uniformly equipped with anti-detachment positioning teeth 32 on its outer side, and the inner sidewall of the sealing groove 2 is uniformly provided with snap-fit ​​grooves that fit the anti-detachment positioning teeth 32. The sealing gasket 3 is uniformly provided with honeycomb-shaped second elastic compensation cavities 30 along the circumference inside, and the second elastic compensation cavity 30 is a closed-loop hexagonal structure. Flexible reinforcing ribs 31 are connected between adjacent second elastic compensation cavities 30.

[0058] By engaging the anti-detachment positioning teeth 32 with the snap-fit ​​groove, the sealing gasket 3 is stably positioned within the sealing groove 2, preventing displacement or detachment during installation and disassembly. This significantly improves the ease of installation and ensures the accuracy of the sealing gasket 3's installation position. The honeycomb-shaped closed-loop hexagonal second elastic compensation cavity 30 allows for adaptive adaptation to local flatness errors on the mounting surface, filling gaps and providing long-term elastic compensation force for the sealing gasket 3. This addresses the issues of permanent deformation and reduced clamping force after long-term compression. The flexible reinforcing ribs 31 ensure the structural strength of the sealing gasket 3 during deformation, preventing structural damage caused by excessive local deformation, extending the service life of the sealing gasket 3, and ensuring long-term stability of the sealing performance of the mating surface.

[0059] In this solution: Before the device operates, the controller 6 has a built-in data acquisition and processing module, a threshold comparison and logic control module, a drive execution module, a standby energy-saving management module, and a remote communication module. Among them, the data acquisition and processing module is used to receive real-time monitoring data transmitted by the temperature and humidity detector 11 and complete the data parsing and preprocessing.

[0060] The threshold comparison and logic control module compares the preprocessed humidity data with a preset humidity threshold and generates corresponding control commands based on the comparison results. The drive execution module receives the control commands, outputs drive signals to the corresponding execution components, and controls the components to complete the corresponding actions. The standby energy-saving management module cuts off power to unnecessary components in the device's standby state, maintaining low-power monitoring operation. The remote communication module transmits the device's real-time operating status and alarm information, and simultaneously receives remotely issued control commands.

[0061] Embed the sealing gasket 3 into the inner cavity of the sealing groove 2, so that the anti-detachment positioning tooth 32 is engaged in the snap-fit ​​groove on the inner side wall of the sealing groove 2 to complete the positioning. Embed the sealing ring 13 into the inner wall of the small diameter hole of the wiring hole 12. Embed the limiting ring 26 into the inner wall of the large diameter hole of the wiring hole 12, so that the limiting ball 27 is engaged in the inner cavity of the limiting groove 28 to complete the snap-fit ​​fixation. Make the inner end face of the limiting ring 26 fit with the sealing ring 13. Pass the wire through the inner cavity of the sealing ring 13 along the insertion direction, so that the tip of the concave lip 23 fits tightly with the outer wall of the wire.

[0062] The first elastic compensation cavity 25 undergoes elastic compression synchronously with the deformation of the concave lip 23. The dirt collection groove 24 traps dust and impurities on the wiring surface. The sealing protective shell 1 is fixed to the outside of the output terminal area of ​​the photovoltaic inverter through the mounting hole 4, so that the sealing gasket 3 is pressed between the sealing groove 2 and the inverter housing. The top rib 29 undergoes elastic deformation and fits tightly against the mounting surface of the inverter housing.

[0063] The second elastic compensation cavity 30 undergoes independent elastic deformation, and the flexible reinforcing rib 31 deforms simultaneously. The sealing gasket 3 fits with the inverter housing to form a closed protective space, sealing the inner cavity of the outer sealing plate 16 and the exhaust hole 14. The sealing block 19 is embedded into the inner cavity of the sealing groove 17, thereby sealing the outer end of the collection groove 9. The limiting side block 20 slides along the limiting side groove 18 to guide the sealing block 19 to be accurately embedded, so that the sealing block 19 is sealed and fitted with the inner cavity of the sealing groove 17.

[0064] After the device is deployed, it is powered on. Each functional module of the controller 6 completes its startup self-test. After the self-test is completed, the device enters the standby monitoring state. The standby energy-saving management module is activated, and only the temperature and humidity detector 11 and the controller 6 are kept in the monitoring operation. The other execution components are in the power-off and stopped state.

[0065] The temperature and humidity detector 11 collects the temperature and humidity data of the inner cavity of the sealed protective shell 1 in real time, and transmits the collected temperature and humidity data to the data acquisition and processing module of the controller 6. After the data acquisition and processing module completes the data preprocessing, it transmits the data to the threshold comparison and logic control module. The threshold comparison and logic control module compares the received temperature and humidity data with the preset humidity threshold and outputs the corresponding control command according to the comparison result.

[0066] When the threshold comparison and logic control module of controller 6 determine that the current humidity exceeds the preset threshold, controller 6 outputs a start command through the drive execution module to control the lifting electric rod 21 to start. The lifting electric rod 21 drives the connecting frame 22 to move upward, and simultaneously drives the sealing outer plate 16 and the sealing block 19 to disengage from the exhaust hole 14 and the sealing groove 17. The limiting side block 20 slides in the opposite direction along the limiting side groove 18 to drive the sealing block 19 to disengage smoothly. Subsequently, controller 6 synchronously controls the semiconductor cooler 7 and the exhaust fan 15 to start running.

[0067] The cooling energy generated by the operation of the semiconductor cooler 7 is transferred to the inner cavity of the sealed protective shell 1 through the temperature-conducting inclined plate 8, causing the water vapor in the air in the inner cavity to condense into liquid water on the surface of the temperature-conducting inclined plate 8. The condensed liquid water flows into the inner cavity of the collection tank 9 along the guide surface of the temperature-conducting inclined plate 8, and then is discharged to the outside of the sealed protective shell 1 through the guide structure of the guide plate 10 along the sealing groove 17. When the exhaust fan 15 is running, it drives the air circulation in the inner cavity of the sealed protective shell 1, accelerating the condensation of water vapor in the inner cavity and reducing the humidity, while simultaneously discharging the air in the inner cavity through the exhaust port 14.

[0068] When the threshold comparison and logic control module of controller 6 determine that the current humidity has fallen below the preset threshold, controller 6 outputs a stop command through the drive execution module to control the semiconductor cooler 7 and the exhaust fan 15 to stop running. Then, controller 6 controls the lifting electric rod 21 to drive the connecting frame 22 to move downward, and simultaneously drives the sealing outer plate 16 and the sealing block 19 to accurately embed into the inner cavity of the exhaust hole 14 and the sealing groove 17.

[0069] The limiting side block 20 slides along the limiting side groove 18 to guide the sealing block 19 to be smoothly embedded, so that the sealing outer plate 16 and the inner cavity of the exhaust hole 14 are sealed and fitted together, and the sealing block 19 and the inner cavity of the sealing groove 17 are sealed and fitted together. After the sealing and sealing are completed, the device returns to the standby monitoring state, the standby energy-saving management module restarts, and only the monitoring operation of the temperature and humidity detector 11 and the controller 6 is retained.

[0070] When the threshold comparison and logic control module of controller 6 determine that the humidity continues to exceed the preset threshold and the dehumidification operation cannot reduce the humidity, controller 6 outputs an alarm command through the drive execution module to control alarm 5 to start and issue a warning signal. At the same time, it transmits the abnormal alarm information to the operation and maintenance platform and operation and maintenance terminal through the remote communication module to remind operation and maintenance personnel to conduct on-site inspection and fault handling. After the fault handling is completed, the device resumes normal monitoring and operation process.

[0071] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0072] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smart moisture-proof device for the output terminals of a photovoltaic inverter, characterized in that, include: A sealed protective shell (1) is provided, and an opening is provided at the bottom of the sealed protective shell (1). A sealing groove (2) is provided around the opening of the sealed protective shell (1), and a sealing gasket (3) is provided in the inner cavity of the sealing groove (2). Mounting holes (4) that are compatible with bolts are provided around the sealed protective shell (1). An alarm (5), a controller (6) and a semiconductor cooler (7) are respectively installed on the top of the sealed protective shell (1). A temperature-conducting inclined plate (8) is set at the bottom of the inner cavity of the sealed protective shell (1), and the temperature-conducting inclined plate (8) is attached to the semiconductor cooler (7). The contact surface of the temperature-conducting inclined plate (8) is designed with low sides and a through-type collection groove (9) is opened on the inner wall of the sealed protective shell (1). The contact surfaces of the temperature-conducting inclined plate (8) enter the inner cavity of the collection groove (9). A flow guide plate (10) with high middle and low sides is installed at the bottom of the inner cavity of the collection groove (9). A temperature and humidity detector (11) is also added around the inner wall of the sealed protective shell (1). Wiring hole (12) is opened on the outside of the sealed protective shell (1), and a sealing ring (13) is embedded in the inner wall of the wiring hole (12). An exhaust hole (14) is also opened on the outside of the sealed protective shell (1), and an exhaust fan (15) is installed in the inner cavity of the exhaust hole (14). A sealing groove (17) is opened at the outer end of the collection groove (9), and the inner cavity of the sealing groove (17) and the vent hole (14) are respectively sealed and fitted with a sealing block (19) and a sealing outer plate (16).

2. The intelligent moisture-proof device for the output terminal of a photovoltaic inverter according to claim 1, characterized in that: The inner wall of the sealing groove (17) is provided with a limiting side groove (18), and the two sides of the sealing block (19) are equipped with a limiting side block (20) that is slidably adapted to the limiting side groove (18).

3. The intelligent moisture-proof device for the output terminal of a photovoltaic inverter according to claim 2, characterized in that: The top center of the sealed protective shell (1) is fitted with a lifting electric rod (21), and a connecting frame (22) is installed at the lifting end of the lifting electric rod (21). The connecting frame (22) is connected to the sealing block (19) and the sealing outer plate (16) respectively.

4. The intelligent moisture-proof device for the output terminal of a photovoltaic inverter according to claim 1, characterized in that: The inner cross-section of the wiring hole (12) is a two-stage stepped type, and the large diameter hole of the wiring hole (12) faces the inside of the sealing protective shell (1), while the small diameter hole of the wiring hole (12) faces the outside of the sealing protective shell (1).

5. The intelligent moisture-proof device for the output terminal of a photovoltaic inverter according to claim 4, characterized in that: The sealing ring (13) is fitted with the inner wall of the small diameter hole of the wiring hole (12), and the inner wall of the sealing ring (13) is uniformly provided with concave lips (23) that are in the same direction and shrink inward in sequence, and the tips of the concave lips (23) are all facing the insertion direction.

6. The intelligent moisture-proof device for the output terminal of a photovoltaic inverter according to claim 5, characterized in that: A closed-loop first elastic compensation cavity (25) is provided between adjacent concave lips (23) on the sealing ring (13), and a closed-loop dirt collection groove (24) is provided at the root of the concave lips (23) on the outside of the sealing ring (13).

7. The intelligent moisture-proof device for the output terminal of a photovoltaic inverter according to claim 5, characterized in that: The inner wall of the large diameter hole of the wiring hole (12) is fitted with a limiting ring (26), and the inner end face of the limiting ring (26) is in contact with the sealing ring (13).

8. The intelligent moisture-proof device for the output terminal of a photovoltaic inverter according to claim 7, characterized in that: The outer circumferential surface of the limiting ring (26) is uniformly equipped with limiting balls (27), and the inner wall of the large diameter hole of the wiring hole (12) is uniformly provided with limiting grooves (28) that are adapted to engage with the limiting balls (27).

9. The intelligent moisture-proof device for the output terminal of a photovoltaic inverter according to claim 1, characterized in that: The sealing gasket (3) and the sealing groove (2) are symmetrically provided with tightening ribs (29), and the tightening ribs (29) are all semi-circular in design.

10. The intelligent moisture-proof device for the output terminal of a photovoltaic inverter according to claim 9, characterized in that: The sealing gasket (3) is uniformly equipped with anti-detachment positioning teeth (32) on its outer side, and the inner sidewall of the sealing groove (2) is uniformly provided with snap-fit ​​grooves that are compatible with the anti-detachment positioning teeth (32). A honeycomb-shaped second elastic compensation cavity (30) is uniformly provided in the circumferential direction inside the sealing gasket (3), and the second elastic compensation cavity (30) is a closed-loop hexagonal structure. A flexible reinforcing rib (31) is connected between adjacent second elastic compensation cavities (30).

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