Photovoltaic inverter protection device

Abstract

The invention discloses a photovoltaic inverter protection device which comprises a shell and a fire protection assembly arranged at the top end of the shell. A first containing space and a second containing space located at the lower end of the first containing space are arranged in the shell, an inverter is installed in the first containing space, and a plurality of heat dissipation holes are formed in the side walls of the two sides of the first containing space respectively; a switch-off assembly and a sealing assembly are arranged in the second accommodating space; the sliding plate is movably arranged on the side wall of the shell, and guide holes matched with the heat dissipation holes are formed in the sliding plate; the sliding base part is arranged on the side wall of the shell and located at the bottom end of the sliding plate, the sliding base part abuts against the sliding frame, and the sliding plate abuts against the upper end edge of the sliding frame; the power substrate can control the sliding frame and the sliding plate to slide up and down; the switch-off assembly is electrically connected with an input or output connecting line of the inverter, and the power substrate controls the switch-off assembly to switch off or switch on a power supply of the inverter. According to the device, when a fire disaster happens to the inverter, a switch can be switched off while fire fighting and extinguishment are carried out.

Description

Technical Field

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

[0002] A photovoltaic inverter is an inverter that converts the variable DC voltage generated by photovoltaic solar panels into AC power at the mains frequency. Photovoltaic inverters are mainly divided into string inverters, centralized inverters, and micro inverters. Among them, string inverters have advantages such as being unaffected by differences between modules in the string and shading, reducing the mismatch between the optimal operating point of the photovoltaic module and the inverter, and increasing power generation.

[0003] After installation, string inverters are usually placed outdoors. In the event of a fire, the DC terminal of the inverter may not be able to be powered off in time, which can easily lead to a fire that is difficult to extinguish in time, causing damage to the inverter and potentially injuring people. Summary of the Invention

[0004] This application provides a photovoltaic inverter protection device to solve the problem that in the prior art, inverter protection devices cannot cut off the power supply in time during fire fighting, which can easily lead to injury to the inverter and personnel.

[0005] This application provides a photovoltaic inverter protection device, the device comprising: a housing and a fire-fighting assembly disposed at the top of the housing;

[0006] The housing has a first accommodating space and a second accommodating space located at the lower end of the first accommodating space. An inverter is installed in the first accommodating space, and multiple heat dissipation holes are respectively provided on the two side walls of the first accommodating space. A circuit breaker assembly and a sealing assembly are provided in the second accommodating space.

[0007] The sealing assembly includes multiple sliding plates, a sliding frame, a sliding base, and a power base. The sliding plates are movably mounted on the side wall of the housing, and the sliding plates are provided with guide holes that match the heat dissipation holes. The sliding base is disposed on the side wall of the housing and located at the bottom end of the sliding plates. The sliding base abuts against the sliding frame, and the sliding plate abuts against the upper edge of the sliding frame. The power base can control the sliding frame and the sliding plates to slide up and down. When the sliding plates slide upward, the guide holes and the heat dissipation holes coincide. When the sliding plates slide downward, the guide holes and the heat dissipation holes are offset, and the sliding plates close the heat dissipation holes.

[0008] The circuit breaker assembly is electrically connected to the input or output line of the inverter, and the power base unit controls the circuit breaker assembly to cut off or close the power supply to the inverter.

[0009] In one possible implementation, the power base includes a counterweight frame and a fixed column;

[0010] The fixed column is fixedly installed on the bottom plate of the second accommodating space. The counterweight frame is sleeved in the fixed column and can move freely up and down in the fixed column. A group of thermal glass balls is also provided between the counterweight frame and the fixed column. The group of thermal glass balls is used to temporarily control the height of the counterweight frame.

[0011] The lower end of the counterweight frame is also provided with a conductive plate. When the counterweight frame slides down, it contacts the contact element provided on the fixed column, so that the controller provided on the bottom plate of the second accommodating space controls the fire-fighting component to perform fire-fighting work.

[0012] In one possible implementation, the power base also includes a rotating frame and a first torsion spring;

[0013] The rotating frame is rotatably mounted on the counterweight frame, and the first torsion spring is connected between the rotating frame and the counterweight frame;

[0014] The rotating frame is also provided with a rotating rod and a stop rod. One end of the rotating rod is fixedly connected to the rotating frame, and the other end of the rotating rod is engaged with a limiting rod. The stop rod is fixedly connected to the rotating rod, and the stop rod is perpendicular to the rotating rod. The stop rod abuts against the extrusion base.

[0015] An independent first fixing plate and a second fixing plate are provided between the first accommodating space and the second accommodating space, and the limiting rod is provided at the bottom end of the first fixing plate.

[0016] In one possible implementation, a plurality of guide rods are provided between the first fixing plate, the second fixing plate and the bottom plate of the second accommodating space;

[0017] A slide block is sleeved on the guide rod adjacent to the fixed column, the slide block is fixedly connected to the counterweight frame, and the extrusion base is disposed on the slide block;

[0018] The extrusion base includes a rotating plate and a fixed seat. The fixed seat is fixedly disposed on the edge of the slide, and the rotating plate is rotatably disposed on the fixed seat, with the rotating plate abutting against the stop bar.

[0019] In one possible implementation, the sliding base further includes a rubber block;

[0020] The rubber block is located at one end of the rotating plate, away from the connection point with the fixed base. A second torsion spring is also provided at the connection point between the rotating plate and the fixed base to provide rotational power for the rotating plate.

[0021] In one possible implementation, the sliding frame includes a sliding frame body and sliding frame side plates. The sliding frame body is sleeved on a plurality of guide rods. The sliding frame side plates are respectively provided at the bottom ends of both sides of the sliding frame body, and the bottom ends of the sliding frame side plates abut against the sliding base.

[0022] The side wall of the housing is provided with a guide groove, and the slide plate slides freely up and down in the guide groove; the side wall of the second accommodating space is provided with a sliding groove perpendicular to the guide groove, and the guide groove and the sliding groove are connected.

[0023] The sliding base includes a slider, which includes a slider body and a slider connector. The slider body is movably disposed in the slide groove, and the slider connector abuts against the inclined surface at the bottom end of the sliding frame side plate. An elastic element is also provided between the slider body and the inner wall of the slide groove.

[0024] In one possible implementation, the circuit breaker assembly includes a first latching member and a second latching member;

[0025] The first snap-fit ​​connector is connected to the connection cable end that is connected to the inverter, and the second snap-fit ​​connector is connected to the connection cable end that is connected to the outside of the housing;

[0026] A switch is movably disposed between the first and second latching components, and the opening and closing of the switch is controlled by the rotation of the rotating rod.

[0027] In one possible implementation, the switch includes a switch connecting portion and a switch pulling portion;

[0028] The switch connecting part and the switch pulling part are arranged perpendicularly, and the connection between the switch connecting part and the switch pulling part is movably connected to the second snap-fit ​​member;

[0029] A tension spring is also provided between the bottom end of the guillotine pull section and the connecting block provided on the bottom plate of the second receiving space.

[0030] In one possible implementation, the fire-fighting assembly includes a mounting rack;

[0031] The placement rack contains multiple independent tanks, each tank having a downward-facing drain pipe. An electric valve is installed on the drain pipe, and the electric valve is electrically connected to the controller. The controller controls the opening and closing of the drain pipe through the electric valve.

[0032] In one possible implementation, the bottom end of the placement rack is further provided with a movable frame, the bottom end of the movable frame is provided with a top cover, and the top cover is provided with a plurality of conical columns.

[0033] The inverter and the exterior of the housing are also connected to multiple connecting lines for inputting or outputting power.

[0034] This application provides a photovoltaic inverter protection device comprising a housing and a fire-fighting assembly mounted on the top of the housing. The housing contains a first accommodating space and a second accommodating space located below the first accommodating space. The inverter is installed in the first accommodating space, and multiple heat dissipation holes are provided on both side walls of the first accommodating space. The second accommodating space contains a circuit breaker assembly and a sealing assembly. The sealing assembly includes multiple sliding plates, a sliding frame, a sliding base, and a power base. The sliding plates are movably mounted on the side walls of the housing and have guide holes matching the heat dissipation holes. The sliding base is located on the side walls of the housing and at the bottom of the sliding plates, abutting against the sliding frame. The sliding plate abuts against the upper edge of the sliding frame; the power base can control the sliding frame and the sliding plate to slide up and down. When the sliding plate slides upward, the guide hole and the heat dissipation hole coincide; when the sliding plate slides downward, the guide hole and the heat dissipation hole are misaligned, and the sliding plate closes the heat dissipation hole; the circuit breaker assembly is electrically connected to the input or output connection line of the inverter, and the power base controls the circuit breaker assembly to cut off or close the power supply of the inverter; the device provided in this application embodiment can provide good protection for the inverter. In the event of a fire in the inverter, it can quickly carry out fire extinguishing, seal the inside of the protection device to reduce oxygen supply, and disconnect the inverter from the external power supply to prevent short circuits and other damage to the inverter, and avoid electric shock to personnel. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0036] Figure 1 This is a schematic diagram of the structure of the photovoltaic inverter protection device provided in the embodiments of this application;

[0037] Figure 2 This is a schematic diagram of the internal structure of the photovoltaic inverter protection device provided in the embodiments of this application;

[0038] Figure 3 This is a schematic cross-sectional view of the housing structure of the photovoltaic inverter protection device provided in the embodiments of this application;

[0039] Figure 4 This is a schematic diagram of the second accommodating space structure of the photovoltaic inverter protection device provided in the embodiments of this application;

[0040] Figure 5 This is a schematic diagram of the sliding base structure of the photovoltaic inverter protection device provided in the embodiments of this application;

[0041] Figure 6This is a schematic diagram of the sealing component structure of the photovoltaic inverter protection device provided in the embodiments of this application;

[0042] Figure 7 This is a schematic diagram of the extruded base structure of the photovoltaic inverter protection device provided in the embodiments of this application;

[0043] Figure 8 This is a schematic diagram of the circuit breaker assembly structure of the photovoltaic inverter protection device provided in the embodiments of this application;

[0044] Figure 9 A schematic diagram of the fire protection component structure of the photovoltaic inverter protection device provided in this application embodiment.

[0045] Explanation of reference numerals in the attached figures:

[0046] 10 — Inverter;

[0047] 11—Connecting wire;

[0048] 100 — casing;

[0049] 110—First Accommodation Space;

[0050] 111—Heat dissipation holes;

[0051] 120 – Second containment space;

[0052] 130—First fixing plate;

[0053] 140 – Second fixing plate;

[0054] 150 – Guide rod;

[0055] 200 – Firefighting components;

[0056] 210 — Shelf;

[0057] 220 — Mobile stand;

[0058] 221—Conical column;

[0059] 230—Top cover;

[0060] 240 — Tank body;

[0061] 250 - drain pipe;

[0062] 260—Electric valve;

[0063] 300—Break-off assembly;

[0064] 310—First card receiving;

[0065] 320 – Second card connector;

[0066] 330 — Switch;

[0067] 331—Knife switch connection part;

[0068] 332—Knife switch pull section;

[0069] 340 – Tension spring;

[0070] 350 — Connecting block;

[0071] 400 – Sealing assembly;

[0072] 410 — Skateboard;

[0073] 411—Guide hole;

[0074] 412—Baffle;

[0075] 413—Guide groove;

[0076] 420 — Sliding frame;

[0077] 430—Sliding base;

[0078] 431—Slide groove;

[0079] 432—Elastic component;

[0080] 433 — Slider;

[0081] 440—Limit rod;

[0082] 450—Power base component;

[0083] 451—Counterweight frame;

[0084] 452—Thermosensitive glass ball assembly;

[0085] 453—Fixed column;

[0086] 454—Conductive plate;

[0087] 455—Contact component;

[0088] 456—Rotating frame;

[0089] 4561 — Rotating rod;

[0090] 4562—Gear lever;

[0091] 457—First torsion spring;

[0092] 460—Extruded base component;

[0093] 461—Rotating plate;

[0094] 462—Rubber block;

[0095] 463—Fixed base;

[0096] 464—Second torsion spring;

[0097] 470 – Slide;

[0098] 480 — Controller.

[0099] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0100] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0101] In the description of this application, it should be understood that the terms "counterclockwise," "clockwise," "longitudinal," "lateral," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0102] The photovoltaic inverter is installed in a protection device that protects the inverter and prevents dangers such as electric shock from occurring during its operation. Simultaneously, the inverter protection device also has fire-resistant properties; in the event of an inverter overload and fire, the protection device will promptly detect the fire and initiate firefighting operations.

[0103] However, the existing protection devices have poor fire resistance, and during firefighting, the protection devices cannot cut off the power supply to the inverter in time, which makes it easy for personnel to be electrocuted during firefighting and rescue work, and may also damage the inverter itself.

[0104] This application provides a photovoltaic inverter protection device, aiming to solve the technical problem in the prior art where inverter protection devices cannot promptly cut off the power supply during firefighting, easily leading to injury to the inverter and personnel. This application, by incorporating a fire-fighting component, a sealing component, and a tripping component into the protection device, allows the fire-fighting component to spray extinguishing substances such as carbon dioxide when a fire occurs in the inverter within the protection device. Simultaneously, the sealing component seals the ventilation and heat dissipation holes on the protection device, and the tripping component cuts off the inverter's connection to the external power supply. The fire-fighting component, sealing component, and tripping component work together to simultaneously extinguish the fire, seal off oxygen, and disconnect the power supply, enabling rapid fire suppression and power cut-off in the event of a fire, protecting rescue personnel from electric shock.

[0105] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0106] Figure 1 This is a schematic diagram of a photovoltaic inverter protection device provided in an embodiment of this application. Figure 1 As shown, the protection device includes: a housing 100 and a fire-fighting assembly 200 disposed at the top of the housing 100; a first receiving space 110 is provided inside the housing 100, and a second receiving space 120 is located at the lower end of the first receiving space 110; an inverter 10 is installed in the first receiving space 110, and multiple heat dissipation holes 111 are respectively provided on the two side walls of the first receiving space 110; a circuit breaker assembly 300 and a sealing assembly 400 are provided in the second receiving space 120.

[0107] The housing 100 is used to install and protect the inverter 10, which has multiple wires connected to a power system outside the housing 100. Exposure of the inverter 10 to environmental factors such as rain and dust can adversely affect its performance, leading to decreased efficiency and potentially causing equipment malfunction or damage. Intrusion of moisture and dust can also cause electrical short circuits or other safety hazards. The housing 100 is designed to ensure good sealing performance to effectively prevent the ingress of rainwater and dust, thereby ensuring the stable operation and long-term use of the inverter 10.

[0108] To house the inverter 10 inside the housing 100 and to neatly arrange the multiple wires of the inverter 10 within the housing 100, the housing 100 includes a first receiving space 110 and a second receiving space 120 located below the first receiving space 110. The inverter 10 is installed in the first receiving space 110, and the multiple wires connecting the inverter 10 are connected to a power source outside the housing 100 through the second receiving space 120. Since the inverter 10 generates heat during normal operation, multiple heat dissipation holes 111 are provided on the left and right side walls of the first receiving space 110 to dissipate the heat generated by the inverter 10 to the outside, preventing the internal temperature of the protection device from becoming too high and affecting the performance of the inverter 10.

[0109] To prevent fire from occurring inside the inverter 10 within the housing 100 and causing damage to the inverter 10, a fire-fighting assembly 200 is installed at the bottom of the housing 100. To prevent personnel from being electrocuted during firefighting operations in the event of a fire in the inverter 10, a circuit breaker assembly 300 and a sealing assembly 400 are installed in the second accommodating space 120.

[0110] The fire suppression component 200 is used to extinguish fires in the inverter 10 by spraying gases or liquids such as carbon dioxide and nitrogen. The fire suppression component 200 can also be equipped with a fire detection sensor, capable of real-time monitoring of the inverter 10's temperature, smoke concentration, etc. Once a fire signal is detected, the component activates and sprays extinguishing media. To improve the efficiency of fire suppression, the fire suppression component 200 can be linked with the circuit breaker component 300 and the sealing component 400 to prevent further spread of the fire.

[0111] The circuit breaker assembly 300 is connected to the input or output power line of the inverter 10. In the event of a fire in the inverter 10, the circuit breaker assembly 300 can quickly disconnect the power supply, preventing electric shock hazards to personnel during fire rescue operations. The circuit breaker assembly 300 not only automatically responds to fire signals but also has a manual power-off function, allowing personnel to manually disconnect the power in emergencies. This dual protection mechanism ensures rapid and safe power disconnection under various circumstances.

[0112] The sealing assembly 400 is used to quickly seal multiple heat dissipation holes 111 on the housing 100 in the event of a fire in the inverter 10, preventing outside air from entering the housing 100, reducing the oxygen inside the housing 100, and effectively preventing the spread of the fire. The heat dissipation holes 111 are normally used for heat dissipation of the inverter 10, but in the event of a fire, sealing these holes can effectively isolate outside air, reduce the oxygen supply, and thus suppress the combustion of the flames.

[0113] like Figure 2As shown, the sealing assembly 400 includes multiple slide plates 410, sliding frames 420, sliding bases 430, and power bases 450. The slide plates 410 are movably mounted on the side wall of the housing 100, and the slide plates 410 are provided with guide holes 411 that match the heat dissipation holes 111. The sliding bases 430 are mounted on the side wall of the housing 100 and are located at the bottom end of the slide plates 410. The sliding bases 430 and the sliding frames 420 abut against each other, and the slide plates 410 abut against the upper edge of the sliding frames 420. The power bases 450 can control the sliding frames 420 and the slide plates 410 to slide up and down. When the slide plates 410 slide upward, the guide holes 411 and the heat dissipation holes 111 coincide. When the slide plates 410 slide downward, the guide holes 411 and the heat dissipation holes 111 are offset, and the slide plates 410 close the heat dissipation holes 111.

[0114] The slide plate 410 is mounted on the side wall of the housing 100. The slide plate 410 has guide holes 411 of the same size and shape as the heat dissipation holes 111, allowing it to slide freely up and down on the side wall. When the slide plate 410 slides upwards, the guide holes 411 and the heat dissipation holes 111 overlap, and the heat generated by the inverter 10 is dissipated to the outside through the guide holes 411 and the heat dissipation holes 111. When a fire occurs in the inverter 10, while the fire suppression system 200 is extinguishing the fire, the slide plate 410 slides downwards, and the guide holes 411 and the heat dissipation holes 111 are misaligned. The slide plate 410 seals the heat dissipation holes 111, isolating the interior of the housing 100 from the outside air, thus facilitating fire suppression.

[0115] The sliding bracket 420 is disposed in the second receiving space 120 and contacts the inner sidewall of the housing 100. Slide plates 410 on the sidewalls of the housing 100 abut against the upper edge of the sliding bracket 420. A sliding base 430 is disposed on the sidewall of the housing 100 located in the second receiving space 120. During normal operation of the inverter 10, the sliding base 430 provides a force to move the sliding bracket 420 and slide plates 410 upwards and maintain them at a fixed height. The sliding base 430 can be a spring, and the resulting elastic force causes the sliding bracket 420 and slide plates 410 to slide to a specified height. The guide hole 411 on the slide plate 410 coincides with the heat dissipation hole 111.

[0116] The power base 450 controls the up-and-down sliding of the sliding frame 420, and consequently the up-and-down sliding of the slide plate 410, thereby sealing or opening the heat dissipation hole 111. This design of the power base 450 not only allows for the rapid sealing of the heat dissipation hole 111 during a fire, preventing external air from entering the housing 100 and reducing oxygen supply to effectively prevent the spread of fire, but also keeps the heat dissipation hole 111 open during normal operation, ensuring the heat dissipation effect of the inverter 10. When a fire occurs in the inverter 10, the power base 450 controls the sliding frame 420 and slide plate 410 to slide down, sealing the heat dissipation hole 111. After the fire is extinguished, the power base 450 no longer provides downward force, allowing the sliding base 430 to push the sliding frame 420 and slide plate 410 upwards.

[0117] The circuit breaker assembly 300 and the input or output connection line 11 of the inverter 10 are electrically connected, and the power base 450 controls the circuit breaker assembly 300 to cut off or close the power supply of the inverter.

[0118] The circuit breaker assembly 300 is installed in the second accommodating space 120 and connected to the input or output connection line of the inverter 10. In the event of a fire, the fire-fighting assembly 200 performs fire extinguishing, and the power base 450 controls the sliding plate 410 to slide down and seal the heat dissipation hole 111. At the same time, the power base 450 controls the circuit breaker assembly 300 to disconnect the inverter 10 from the external input or output connection line, thus avoiding the risk of electric shock during fire rescue.

[0119] This application provides a photovoltaic inverter protection device, comprising a housing and a fire-fighting assembly mounted on the top of the housing. The housing contains a first accommodating space and a second accommodating space located below the first accommodating space. The inverter is installed in the first accommodating space, and multiple heat dissipation holes are provided on both side walls of the first accommodating space. The second accommodating space contains a circuit breaker assembly and a sealing assembly. The sealing assembly includes multiple sliding plates, a sliding frame, a sliding base, and a power base. The sliding plates are movably mounted on the side walls of the housing and have guide holes that match the heat dissipation holes. The sliding base is located on the side walls of the housing and at the bottom of the sliding plates, abutting against the sliding frame. The sliding plate abuts against the upper edge of the sliding frame; the power base can control the sliding frame and the sliding plate to slide up and down. When the sliding plate slides upward, the guide hole and the heat dissipation hole coincide; when the sliding plate slides downward, the guide hole and the heat dissipation hole are misaligned, and the sliding plate closes the heat dissipation hole; the circuit breaker assembly is electrically connected to the input or output connection line of the inverter, and the power base controls the circuit breaker assembly to cut off or close the power supply of the inverter; the device provided in this application embodiment can provide good protection for the inverter. In the event of a fire in the inverter, it can quickly carry out fire extinguishing, seal the inside of the protection device to reduce oxygen supply, and disconnect the inverter from the external power supply to prevent short circuits and other damage to the inverter, and avoid electric shock to personnel.

[0120] Furthermore, based on the above embodiments, the power base 450 will be described in detail, such as... Figure 3 and Figure 6 As shown, the power base 450 includes a counterweight frame 451 and a fixed column 453. The fixed column 453 is fixedly installed on the bottom plate of the second accommodating space 120. The counterweight frame 451 is sleeved in the fixed column 453 and can move freely up and down in the fixed column 453. A thermal glass ball assembly 452 is also provided between the counterweight frame 451 and the fixed column 453. The thermal glass ball assembly 452 is used to temporarily control the height of the counterweight frame 451. A conductive plate 454 is also provided at the lower end of the counterweight frame 451. When the counterweight frame 451 slides down, it contacts the contact member 455 provided on the fixed column 453, so that the controller 480 provided on the bottom plate of the second accommodating space 120 controls the fire-fighting component 200 to perform fire-fighting work.

[0121] A fixed column 453 on the power base 450 is fixedly mounted on the base plate of the second receiving space 120. A counterweight frame 451 is sleeved on the top of the fixed column 453, providing gravity and allowing the counterweight frame 451 to slide freely up and down on the fixed column 453. A thermosensitive glass ball assembly 452 is also provided between the counterweight frame 451 and the fixed column 453. The thermosensitive glass ball assembly 452 can temporarily control the height of the counterweight frame 451. When a fire occurs, the thermosensitive glass ball assembly 452 melts or breaks due to heat, and the counterweight frame 451 slides downward under its own weight. The thermosensitive glass ball assembly 452 has thermosensitive properties and can respond quickly in the early stages of a fire. The thermosensitive glass ball assembly 452 is usually made of special materials that can melt or break within a specific temperature range. Once a fire occurs and the temperature reaches a specific value, the glass ball assembly 452 will immediately melt or break, causing the counterweight frame 451 to lose support and slide down rapidly.

[0122] A conductive plate 454 is also provided at the lower end of the counterweight frame 451, and a corresponding contact 455 is provided on the fixed column 453. When the counterweight frame 451 slides downward, the conductive plate 454 contacts the contact 455 provided on the fixed column 453, causing the controller 480 provided on the bottom plate of the second receiving space 120 to control the fire-fighting component 200 to perform fire-fighting work.

[0123] Furthermore, such as Figure 6As shown, the power base 450 also includes a rotating frame 456 and a first torsion spring 457; the rotating frame 456 is rotatably mounted on the counterweight frame 451, and the first torsion spring 457 is connected between the rotating frame 456 and the counterweight frame 451; the rotating frame 456 is also provided with a rotating rod 4561 and a stop rod 4562, one end of the rotating rod 4561 is fixedly connected to the rotating frame 456, and the other end of the rotating rod 4561 is engaged with a limiting rod 440; the stop rod 4562 is fixedly connected to the rotating rod 4561, and the stop rod 4562 is perpendicular to the rotating rod 4561; the stop rod 4562 abuts against the pressing base 460; an independent first fixing plate 130 and a second fixing plate 140 are provided between the first accommodating space 110 and the second accommodating space 120, and the limiting rod 440 is provided at the bottom end of the first fixing plate 130.

[0124] A rotating frame 456 is also rotatably mounted on the counterweight frame 451. The rotating frame 456 can rotate freely on the counterweight frame 451. A first torsion spring 457 is connected between the rotating frame 456 and the counterweight frame 451 by means of snap-fit, bolt connection, welding or bonding. The first torsion spring 457 provides an elastic force to make the rotating frame 456 rotate.

[0125] The rotating frame 456 can be configured as a "T" shape, including a rotating rod 4561 and a stop bar 4562. One end of the rotating rod 4561 is fixedly connected to the rotating frame 456 by welding, bonding, or other methods. The other end of the rotating rod 4561 is engaged with a limiting rod 440. The limiting rod 440 can temporarily fix the rotating rod 4561 to rotate. In the event of a fire, the counterweight frame 451 slides downward, the rotating rod 4561 and the limiting rod 440 separate, and the rotating rod 4561 begins to rotate. The stop bar 4562 is fixedly connected to the rotating rod 4561 by welding, bonding, or other methods, and the stop bar 4562 and the rotating rod 4561 are set perpendicularly. The stop bar 4562 abuts against the extrusion base 460. When the rotating rod 4561 rotates, the stop bar 4562 and the extrusion base 460 separate, and the extrusion base 460 begins to function.

[0126] An independent first fixing plate 130 and a second fixing plate 140 are provided between the first accommodating space 110 and the second accommodating space 120, and a limiting rod 440 is provided at the bottom end of the first fixing plate 130. A gap is provided between the first fixing plate 130 and the second fixing plate 140 so that the wires connected to the inverter 10 can pass through.

[0127] Furthermore, such as Figure 4 and Figure 7As shown, a plurality of guide rods 150 are provided between the first fixing plate 130, the second fixing plate 140, and the bottom plate of the second accommodating space 120; a slide 470 is sleeved on the guide rod 150 adjacent to the fixing column 453, the slide 470 and the counterweight frame 451 are fixedly connected, and the extrusion base 460 is provided on the slide 470; the extrusion base 460 includes a rotating plate 461 and a fixed seat 463, the fixed seat 463 is fixedly provided on the edge of the slide 470, the rotating plate 461 is rotatably provided on the fixed seat 463, and the rotating plate 461 abuts against the stop bar 4562.

[0128] Multiple guide rods 150 are independently disposed between the first fixing plate 130 and the bottom plate of the second receiving space 120, and between the second fixing plate 140 and the bottom plate of the second receiving space 120. A slide block 470 is sleeved on any guide rod 150 adjacent to the fixing column 453. The slide block 470 and the counterweight frame 451 are fixedly connected by welding, bonding or other methods, and the slide block 470 can slide freely up and down on the guide rod 150.

[0129] A fixed base 463 and a rotating plate 461 are rotatably connected to the edge of the slide 470, and the rotating plate 461 abuts against the stop lever 4562. When the stop lever 4562 rotates, the stop lever 4562 and the rotating plate 461 separate, and the rotating plate 461 begins to rotate.

[0130] Furthermore, such as Figure 6 and Figure 7 As shown, the sliding base 460 also includes a rubber block 462; the rubber block 462 is located at one end of the rotating plate 461 away from the connection with the fixed seat 463, and a second torsion spring 464 is also provided at the connection between the rotating plate 461 and the fixed seat 463 to provide rotational power for the rotating plate 461.

[0131] One end of the rotating plate 461 is connected to the fixed base 463, and the other end of the rotating plate 461 is provided with a rubber block 462. A second torsion spring 464 is also provided at the connection between the rotating plate 461 and the fixed base 463. The second torsion spring 464 provides power to make the rotating plate 461 rotate. The rubber block 462 collides with the sliding frame 420, providing a downward force to the sliding frame 420, and the sliding frame 420 and the slide plate 410 slide downward.

[0132] Furthermore, such as Figure 3 and Figure 5As shown, the sliding frame 420 includes a sliding frame body and sliding frame side plates. The sliding frame body is sleeved on multiple guide rods 150. Sliding frame side plates are respectively provided on the bottom ends of both sides of the sliding frame body, and the bottom ends of the sliding frame side plates abut against the sliding base 430. A guide groove 413 is provided on the side wall of the housing 100, and the slide plate 410 slides freely up and down in the guide groove 413. In order to prevent the slide plate 410 from sliding out from the top when it slides in the guide groove 413, a baffle 412 is also provided at the top of the guide groove 413 located in the first receiving space 110 to control the sliding height of the slide plate 410 when it slides upward. The second accommodating space 120 has a sliding groove 431 perpendicular to the guide groove 413 on its side wall, and the guide groove 413 and the sliding groove 431 are connected; the sliding base 430 includes a slider 433, which includes a slider body and a slider connector. The slider body is movably disposed in the sliding groove 431, and the slider connector abuts against the inclined surface at the bottom end of the sliding frame side plate; an elastic element 432 is also provided between the slider body and the inner side wall of the sliding groove 431.

[0133] The sliding frame 420 and the second accommodating space 120 are arranged parallel to each other, and the sliding frame body is sleeved on multiple guide rods 150, allowing the sliding frame body to slide freely up and down on the multiple guide rods 150. Sliding frame side plates are fixedly connected to both sides of the sliding frame body by welding, bonding, or other methods, and these side plates contact the side walls of the second accommodating space 120. Simultaneously, the bottom end of the sliding frame side plate abuts against the sliding base 430. To better control the up and down sliding of the sliding frame side plate, an arc-shaped contact surface is initially set at the contact position between the sliding frame side plate and the sliding base 430.

[0134] To allow the slide plate 410 to slide freely on the side wall of the housing 100 and prevent it from easily detaching from the side wall, a guide groove 413 is provided on the side wall of the housing 100. The slide plate 410 is engaged in the guide groove 413 and can slide freely up and down within the guide groove 413. A sliding groove 431 perpendicular to the guide groove 413 is also provided on the side wall of the second receiving space 120, and the guide groove 413 and the sliding groove 431 are connected. The slider 433 in the sliding base 430 is movably disposed in the sliding groove 431 and can slide freely within the sliding groove 431. The slider body is movably disposed in the sliding groove 431, and the slider connector abuts against the inclined surface at the bottom end of the sliding frame side plate. An elastic element 432 is also provided between the slider body and the inner side wall of the sliding groove 431, allowing the slider body to slide freely within the sliding groove 431.

[0135] Furthermore, such as Figure 8As shown, the circuit breaker assembly 300 includes a first latching member 310 and a second latching member 320; the first latching member 310 is connected to the end of the connecting line 11 connected to the inverter 10, and the second latching member 320 is connected to the end of the connecting line 11 connected to the outside of the housing 100; a switch 330 is movably disposed between the first latching member 310 and the second latching member 320, and the opening and closing of the switch 330 is controlled by the rotation of the rotating rod 4561.

[0136] The circuit breaker assembly 300 is located at the power input line or power output line end connected to the inverter 10. The first snap-fit ​​connector 310 is connected to the connection line 11 end connected to the inverter 10, and the second snap-fit ​​connector 320 is connected to the connection line 11 end connected to the outside of the housing 100. A switch 330 is movably disposed between the first snap-fit ​​connector 310 and the second snap-fit ​​connector 320. When a fire occurs, the rotating rod 4561 controls the switch 330 to open during rotation, so that fire extinguishing, air sealing and isolation, and circuit breaker disconnection can work simultaneously during a fire, effectively preventing fire and electric shock to personnel.

[0137] Furthermore, such as Figure 8 As shown, the switch 330 includes a switch connecting part 331 and a switch pulling part 332; the switch connecting part 331 and the switch pulling part 332 are arranged vertically, and the connection between the switch connecting part 331 and the switch pulling part 332 is movably connected to the second snap-fit ​​member 320; a tension spring 340 is also provided between the bottom end of the switch pulling part 332 and the connecting block 350 provided on the bottom plate of the second receiving space 120.

[0138] The switch 330 can be configured in an "L" shape. The switch connecting part 331 and the switch pulling part 332 of the switch 300 are vertically arranged. The connection between the switch connecting part 331 and the switch pulling part 332 is movably connected to the second locking member 320. A tension spring 340 is also provided between the bottom end of the switch pulling part 332 and the connecting block 350 provided on the bottom plate of the second receiving space 120. This ensures that the rotation of the rotating rod 4561 controls the switch connecting part 331 to disconnect from the first locking member 310. The tension spring 340 is also provided between the connecting blocks 350 on the bottom plate of the second receiving space 120, and the tension of the tension spring 340 is less than the friction between the switch connecting part 331 and the first locking member 310. Thus, under normal circumstances, the switch connecting part 331 and the first locking member 310 are in contact. When a fire occurs, the rotating rod 4561 rotates to ensure that the switch connecting part 331 and the first locking member 310 are properly disconnected.

[0139] Furthermore, such as Figure 9As shown, the fire-fighting component 200 includes a rack 210; multiple independent tanks 240 are installed inside the rack 210, and each tank 240 is equipped with a drain pipe 250 with a downward-facing outlet. An electric valve 260 is installed on the drain pipe 250, and the electric valve 260 is electrically connected to a controller 480. The controller 480 controls the opening and closing of the drain pipe 250 through the electric valve 260.

[0140] The rack 210 is equipped with multiple independent tanks 240, each containing fire extinguishing gas or liquid. Each tank 240 has a downward-facing drain pipe 250, and an electric valve 260 is installed on the drain pipe 250. The electric valve 260 is electrically connected to a controller 480. In the event of a fire, the controller 480 controls the drain pipe 250 to open via the electric valve 260, spraying the fire extinguishing gas or liquid downwards for fire suppression.

[0141] Furthermore, such as Figure 9 As shown, a movable frame 220 is also provided at the bottom of the placement frame 210, and a top cover 230 is provided at the bottom of the movable frame 220. Multiple conical columns 221 are provided on the top cover 230. Multiple connecting wires are also connected to the outside of the inverter 10 and the housing 100 for input or output power.

[0142] The bottom of the mounting rack 210 is also equipped with a movable rack 220, and the bottom of the movable rack 220 is equipped with a top cover 230. The top cover 230 can be roof-shaped to prevent rainwater from accumulating on the protective device during rain. Multiple conical posts 221 are provided on the top cover 230. The conical posts 221 can prevent birds and other objects from landing on the protective device and causing damage, and can also allow debris that falls on the conical posts 221 to drain out through the gaps between the conical posts 221. Multiple connecting cables are also connected to the outside of the inverter 10 and the housing 100 for input or output power.

[0143] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0144] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0145] It should be noted that phrases such as "in specific implementations," "in some embodiments," "in this embodiment," and "exemplarily" in the specification indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0146] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0147] It should be readily understood that “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0148] Furthermore, for ease of explanation, spatial relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatial relative terms are intended to encompass different orientations of a device in use or operation other than those shown in the figures. Devices may have other orientations (rotated 90 degrees or in other orientations), and the spatial relative descriptive terms used herein can be interpreted accordingly. In the above embodiments, the descriptions of each embodiment have their own emphasis; parts not detailed in a particular embodiment can be referred to in the relevant descriptions of other embodiments. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; however, as long as these combinations of technical features do not contradict each other, they should be considered within the scope of this specification.

[0149] Furthermore, in the description of this invention, it should be noted that the terms "front," "rear," etc., indicating orientation or positional relationship are based on orientation or positional relationship, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0150] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A photovoltaic inverter protection device, characterized in that, The device includes: a housing (100) and a fire-fighting assembly (200) disposed at the top of the housing (100). The housing (100) is provided with a first accommodating space (110) and a second accommodating space (120) located at the lower end of the first accommodating space (110). An inverter (10) is installed in the first accommodating space (110), and a plurality of heat dissipation holes (111) are respectively provided on the two side walls of the first accommodating space (110). A circuit breaker assembly (300) and a sealing assembly (400) are provided in the second accommodating space (120). The sealing assembly (400) includes multiple sliding plates (410), a sliding frame (420), a sliding base (430), and a power base (450). The sliding plates (410) are movably disposed on the side wall of the housing (100), and the sliding plates (410) are provided with guide holes (411) that match the heat dissipation holes (111). The sliding base (430) is disposed on the side wall of the housing (100) and located at the bottom end of the sliding plates (410). The sliding base (430) and the sliding frame (420) are connected to the sliding frame (450). The sliding frame (420) abuts against each other, and the sliding plate (410) abuts against the upper edge of the sliding frame (420); the power base (450) can control the sliding frame (420) and the sliding plate (410) to slide up and down. When the sliding plate (410) slides upward, the guide hole (411) and the heat dissipation hole (111) coincide. When the sliding plate (410) slides downward, the guide hole (411) and the heat dissipation hole (111) are misaligned, and the sliding plate (410) closes the heat dissipation hole (111). The circuit breaker assembly (300) and the inverter (10) are electrically connected by an input or output connection line (11), and the power base (450) controls the circuit breaker assembly (300) to cut off or close the power supply to the inverter (10).

2. The apparatus according to claim 1, characterized in that, The power base (450) includes a counterweight frame (451) and a fixed column (453); The fixed column (453) is fixedly installed on the bottom plate of the second accommodating space (120). The counterweight frame (451) is sleeved in the fixed column (453) and can move freely up and down in the fixed column (453). A thermosensitive glass ball assembly (452) is also provided between the counterweight frame (451) and the fixed column (453). The thermosensitive glass ball assembly (452) is used to temporarily control the height of the counterweight frame (451). The lower end of the counterweight frame (451) is also provided with a conductive plate (454). When the counterweight frame (451) slides down, it contacts the contact (455) provided on the fixed column (453), so that the controller (480) provided on the bottom plate of the second accommodating space (120) controls the fire-fighting component (200) to perform fire-fighting work.

3. The apparatus according to claim 2, characterized in that, The power base (450) also includes a rotating frame (456) and a first torsion spring (457). The rotating frame (456) is rotatably mounted on the counterweight frame (451), and the first torsion spring (457) is connected between the rotating frame (456) and the counterweight frame (451). The rotating frame (456) is also provided with a rotating rod (4561) and a stop rod (4562). One end of the rotating rod (4561) is fixedly connected to the rotating frame (456), and the other end of the rotating rod (4561) is engaged with a limiting rod (440). The stop rod (4562) is fixedly connected to the rotating rod (4561), and the stop rod (4562) is perpendicular to the rotating rod (4561). The stop rod (4562) abuts against the extrusion base (460). An independent first fixing plate (130) and a second fixing plate (140) are provided between the first accommodating space (110) and the second accommodating space (120), and the limiting rod (440) is provided at the bottom end of the first fixing plate (130).

4. The apparatus according to claim 3, characterized in that, A plurality of guide rods (150) are provided between the first fixing plate (130), the second fixing plate (140) and the bottom plate of the second accommodating space (120). A slide (470) is sleeved on the guide rod (150) adjacent to the fixed column (453). The slide (470) is fixedly connected to the counterweight frame (451). The extrusion base (460) is disposed on the slide (470). The extrusion base (460) includes a rotating plate (461) and a fixed seat (463). The fixed seat (463) is fixedly disposed on the edge of the slide (470). The rotating plate (461) is rotatably disposed on the fixed seat (463), and the rotating plate (461) and the stop bar (4562) abut against each other.

5. The apparatus according to claim 4, characterized in that, The sliding base (460) also includes a rubber block (462); The rubber block (462) is located at one end of the rotating plate (461) away from the connection with the fixed seat (463). A second torsion spring (464) is also provided at the connection between the rotating plate (461) and the fixed seat (463) to provide rotational power for the rotating plate (461).

6. The apparatus according to claim 4, characterized in that, The sliding frame (420) includes a sliding frame body and a sliding frame side plate. The sliding frame body is sleeved on a plurality of guide rods (150). The sliding frame side plates are respectively provided on the bottom ends of both sides of the sliding frame body, and the bottom ends of the sliding frame side plates abut against the sliding base (430). The side wall of the housing (100) is provided with a guide groove (413), and the slide plate (410) slides freely up and down in the guide groove (413); the side wall of the second accommodating space (120) is provided with a sliding groove (431) perpendicular to the guide groove (413), and the guide groove (413) and the sliding groove (431) are connected. The sliding base (430) includes a slider (433), which includes a slider body and a slider connector. The slider body is movably disposed in the slide groove (431), and the slider connector abuts against the inclined surface at the bottom end of the sliding frame side plate. An elastic element (432) is also provided between the slider body and the inner wall of the slide groove (431).

7. The apparatus according to claim 3, characterized in that, The circuit breaker assembly (300) includes a first snap-fit ​​component (310) and a second snap-fit ​​component (320); The first snap-fit ​​connector (310) is connected to the end of the connection line (11) connected to the inverter (10), and the second snap-fit ​​connector (320) is connected to the end of the connection line (11) connected to the outside of the housing (100); A switch (330) is movably disposed between the first latch (310) and the second latch (320), and the switch (330) is opened and closed by rotating the rotating rod (4561).

8. The apparatus according to claim 7, characterized in that, The switch (330) includes a switch connecting part (331) and a switch pulling part (332); The switch connecting part (331) and the switch pulling part (332) are arranged vertically, and the connection between the switch connecting part (331) and the switch pulling part (332) is movably connected to the second snap-fit ​​member (320); A tension spring (340) is also provided between the bottom end of the guillotine pull part (332) and the connecting block (350) provided on the bottom plate of the second receiving space (120).

9. The apparatus according to claim 2, characterized in that, The fire-fighting assembly (200) includes a shelf (210); The placement rack (210) is provided with multiple independent tanks (240). Each tank (240) is provided with a drain pipe (250) with its outlet facing downwards. Each drain pipe (250) is provided with an electric valve (260). The electric valve (260) is electrically connected to the controller (480). The controller (480) controls the opening and closing of the drain pipe (250) through the electric valve (260).

10. The apparatus according to claim 9, characterized in that, The bottom of the placement rack (210) is also provided with a movable rack (220), and the bottom of the movable rack (220) is provided with a top cover (230), and the top cover (230) is provided with a plurality of conical columns (221). The inverter (10) and the housing (100) are also connected to a plurality of connecting lines for inputting or outputting power.

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