Fireproof intelligent power distribution box with temperature measurement function

Abstract

The application discloses a temperature measurement fireproof intelligent power distribution box and particularly relates to the technical field of power distribution box equipment, which comprises a box body, a fan is fixed on one side of the box body, a module assembly and a mounting box are fixed on the other side of the box body, a ventilation pipe is fixed at an opening on one side of the mounting box, a filtering part is fixed at an opening on the other side of the mounting box, and a staged ventilation part is fixed between the ventilation pipe and the filtering part. The temperature measurement fireproof intelligent power distribution box can realize intelligent heat dissipation regulation through real-time monitoring of the temperature in the inner cavity of the box body by a temperature sensor and cooperative control of the staged ventilation part according to three temperature intervals, i.e., a first-level early warning (55-62 DEG C), a second-level high temperature (62-70 DEG C) and a third-level overtemperature (>=70 DEG C). The temperature interval setting and the staged regulation and control can avoid the frequent start-stop of the fan of the traditional box body when the load fluctuates or the ambient temperature slightly changes.

Description

Technical Field

[0001] This invention relates to the field of electrical distribution box technology, and in particular to a temperature-measuring and fire-prevention intelligent electrical distribution box. Background Technology

[0002] Distribution boxes are core equipment in low-voltage power supply systems used for receiving and distributing electrical energy, and are widely used in residential buildings, industrial plants, commercial buildings, and various public places. Distribution boxes typically contain protective and control electrical appliances such as fuses, residual current devices (RCDs), circuit breakers, contactors, and disconnect switches, as well as metering equipment such as current transformers and electricity meters. Distribution boxes are usually installed on the low-voltage side of distribution transformers. In the height of summer, distribution boxes exposed to direct sunlight can sometimes reach temperatures exceeding 60°C due to direct sunlight, ground heat reflection, and heat generated by the equipment itself.

[0003] During the use of the distribution box, if only a fixed temperature (such as 60℃) is set to start the fan and it stops when the temperature drops below the fixed temperature, the fan will frequently start and stop when the load fluctuates or the ambient temperature changes slightly. This will significantly shorten the lifespan of the motor and relay contacts on the fan. The circuit breakers, contactors and other electronic components in the distribution box can tolerate short-term overload or short-term high temperature (for example, when the ambient temperature is 40℃ in summer, the temperature inside the box may reach 65℃, but it can still run for several hours). If it trips immediately at 60℃, it will cause frequent power outages, affecting production and daily life. In addition, for faults such as loose wiring and contact oxidation, the temperature rises slowly. If the alarm is only triggered at the extreme temperature, insulation aging or damage to adjacent electronic components has often already occurred, which may lead to short circuits or fires. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that using a single fixed temperature threshold to control the start and stop of a fan leads to a shortened lifespan of the fan and relays due to frequent start and stop, and that setting the threshold too low causes unnecessary tripping of components such as circuit breakers and contactors, resulting in frequent power outages. Therefore, a temperature-measuring and fire-prevention intelligent distribution box is proposed.

[0005] To achieve the above objectives, the present invention employs the following techniques: A temperature-measuring and fire-prevention intelligent power distribution box includes a box body, a temperature sensor fixed in the upper part of the inner cavity of the box body, a fan fixed in one side of the box body, a module assembly and a mounting box fixed in the other side of the box body, a ventilation pipe fixed in one opening of the mounting box, a filter component fixed in the other opening, and a graded ventilation component fixed between the ventilation pipe and the filter component. The graded ventilation component includes a fixed frame fixedly connected to the ventilation duct. Electric push rods located at the upper and lower parts are fixed on both sides of the fixed frame. A movable component is fixed at the output end of each electric push rod. A set of elastic components is fixed on both sides of the fixed frame. A sliding component is provided on each set of elastic components. Multiple mounting rods are rotatably mounted on each sliding component via a torsion spring. A rotating component is fixedly mounted on each mounting rod. An air guide plate is fixed on each mounting rod. The two electric push rods drive the movable components on the same side to move a certain distance. The rotating component, in conjunction with the mounting rod, causes the air guide plate to rotate at a certain angle. When the movable component moves again, the air guide plates on both sides move in opposite directions, increasing the distance between the two adjacent air guide plates in the middle.

[0006] Further description of a temperature-measuring and fire-prevention intelligent distribution box as described above: The movable component includes a fixed block fixed to the output end of the electric push rod. A U-shaped plate that slides on the fixed frame is fixed to one side of the fixed block. The U-shaped plate has a set of sliding grooves, a set of adapter grooves and a set of mounting holes. The sliding grooves are adapted to the mounting rod.

[0007] Further description of a temperature-measuring and fire-prevention intelligent distribution box as described above: The elastic component includes a fixing plate fixed to a fixing frame, and a connecting spring is fixed on the fixing plate.

[0008] Further description of a temperature-measuring and fire-prevention intelligent distribution box as described above: The sliding assembly includes a slider that slides on a fixed frame. A cylindrical groove adapted to a connecting spring is provided on one side of the slider. Two limiting tubes fitted around the outside of the connecting spring are fixed on one side of the slider.

[0009] Further description of a temperature-measuring and fire-prevention intelligent distribution box as described above: The rotating assembly includes a fixed tube fixed to a mounting rod. Two symmetrical straight rods are fixed to the outer surface of the fixed tube. Each of the two straight rods is fitted with a mounting post. An extension square tube that matches the fitting groove and mounting hole is rotatably mounted on each of the two mounting posts.

[0010] Further description of a temperature-measuring and fire-prevention intelligent distribution box as described above: Both sides of the graded ventilation component are fixed with expansion components. Each expansion component includes a mating block fixedly connected to the fixed frame. The mating block has a ventilation groove. Both sides of the mating block have ventilation openings communicating with the inner cavity of the ventilation groove. A stop block is slidably installed in the inner cavity of the ventilation groove. The side wall of the ventilation groove is provided with a telescopic component adapted to the stop block. A connecting rod is fixedly fixed through the stop block. A push plate adapted to the U-shaped plate is fixed on the connecting rod.

[0011] Further description of a temperature-measuring and fire-prevention intelligent distribution box as described above: The telescopic assembly includes an installation tube embedded in the side wall of the ventilation slot cavity, a top tube slidably installed in the inner cavity of the installation tube, and a telescopic spring fixed between the top tube and the installation tube.

[0012] Further description of a temperature-measuring and fire-prevention intelligent distribution box as described above: The filter component includes a connecting frame fixed to the mounting box, a filter screen fixed inside the connecting frame, sliding blocks with opposite directions of movement fixed on both sides of the connecting frame, two sliding blocks fixedly connected to a U-shaped plate on the same side, multiple fixing rods fixed on each sliding block, and a scraper that is in close contact with the surface of the filter screen fixed on each fixing rod.

[0013] In summary, due to the adoption of the above-mentioned technology in the temperature-measuring and fire-prevention intelligent distribution box, the beneficial effects of this invention are: 1. This device monitors the ambient temperature inside the enclosure in real time through a temperature sensor, and coordinates the control of the graded ventilation components to achieve intelligent heat dissipation adjustment based on three preset temperature ranges: Level 1 warning (55℃~62℃), Level 2 high temperature (62℃~70℃), and Level 3 over-temperature (≥70℃). By setting temperature ranges for graded control, it avoids the problem of frequent fan start-stop when the load fluctuates or the ambient temperature changes slightly in traditional enclosures, and also solves the drawback of frequent tripping of electronic components due to fixed temperature thresholds, which affects production and daily life. When the internal temperature of the chamber is in the first warning range, the air guide plate is kept straight and the fan is turned on to ensure local convection inside the chamber. When the internal temperature of the chamber is in the secondary high temperature range, the two electric push rods drive the movable components on the same side to move a certain distance. By rotating the components and the mounting rod, the air guide plate is rotated at a certain angle, and the air inlet angle is adjusted so that the air guide plate is tilted downward. The incoming cold air flows upward through the lower part of the chamber, forming an airflow path that flows downward from a high place and then turns back upward and is discharged by the fan. This improves the circulation efficiency of the air inside the chamber and can more effectively remove heat. Compared with the traditional single-direction heat dissipation, it improves the heat exchange effect. When the internal temperature of the chamber is in the third-level overheating range, the electric push rod drives the moving components to move again, causing the two sliding components to move in opposite directions. This causes the air guides on both sides to move in opposite directions, so that the air guide near the inner wall of the fixed frame moves and comes into close contact with the inner wall of the fixed frame. This increases the distance between the two adjacent air guides in the middle, thereby significantly increasing the air intake area. While maintaining the optimized air intake angle, this greatly increases the air flow speed and achieves rapid cooling.

[0014] 2. This device, through the setting of multi-level temperature ranges and progressively enhanced heat dissipation measures, effectively intervenes before the temperature reaches its limit in cases of slow temperature rise caused by faults such as loose wiring and contact oxidation. This prevents insulation aging, damage to adjacent electronic components, and avoids short circuits or fires, greatly improving the safety and reliability of the enclosure.

[0015] 3. This device, through the cooperation of its enlarged components and graded ventilation components, can further expand the air intake area and increase the air flow speed when the internal temperature of the chamber is in the third-level overheating range, thereby achieving rapid cooling; When the electric push rod drives the movable component to the position corresponding to the third-level overheating zone, the U-shaped plate will push the push plate during the movement, causing the block to slide to the top of the ventilation slot cavity against the elastic force of the telescopic component. The connecting rod fixed through the block moves with the block. At this time, the block no longer blocks the ventilation opening on the mating block, which, combined with the effect of the increased distance between the adjacent air guide plates in the middle, further expands the overall air intake area, ensuring that more external cold air can enter the inner cavity of the box and exchange heat with the high-temperature air inside the box, accelerating the heat dissipation.

[0016] 4. The filter component in this device is linked with the staged ventilation component. While the U-shaped plate moves to adjust the air intake angle and area, it also cleans the dust from the filter surface, thus reducing the impact of filter clogging on ventilation efficiency. When the electric push rod drives the movable component to move, the U-shaped plate moves the sliding block synchronously. Multiple fixed rods on each sliding block move accordingly, and the scrapers fixed to the rods are in close contact with the filter surface. In the secondary high-temperature zone, the sliding block drives the scraper to move within a small range or maintain a specific position on the filter surface, using the scraper to perform preliminary cleaning of the filter surface and prevent excessive dust from clogging the filter and affecting air intake. When entering the tertiary over-temperature zone, with the large movement of the U-shaped plate, the sliding block drives the scraper to move even more widely on the filter surface, performing a more thorough cleaning of the filter surface. This ensures that the filter can maintain good ventilation performance even when the air intake area is at its maximum and the air volume demand is the highest, avoiding reduced heat dissipation efficiency due to filter clogging. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall structure of the present invention is shown; Figure 2 A schematic diagram of the internal structure of the present invention is shown; Figure 3 A schematic diagram of the structure on the mounting box of the present invention is shown; Figure 4 A schematic diagram of the structure of the graded ventilation component of the present invention is shown; Figure 5An exploded view of the structure of the graded ventilation component of the present invention is shown; Figure 6 A schematic diagram of the active component, elastic component, and sliding component of the present invention is shown; Figure 7 A schematic diagram of the rotating component structure of the present invention is shown; Figure 8 A schematic diagram of the air guide plate of the present invention in rotation state is shown; Figure 9 A schematic diagram of the moving state of the air guide plate of the present invention is shown; Figure 10 A schematic diagram of the enlarged component structure of the present invention is shown; Figure 11 A schematic diagram of the telescopic component structure of the present invention is shown; Figure 12 A schematic diagram showing the mating state of the graded ventilation component and the expansion component of the present invention is shown; Figure 13 A schematic diagram of the filter component structure of the present invention is shown; Figure 14 A schematic diagram showing the combined state of the filter component and the graded ventilation component of the present invention is provided.

[0018] Legend: 10. Enclosure; 11. Fan; 12. Modular components; 13. Mounting box; 14. Ventilation duct; 20. Staged ventilation component; 21. Fixed frame; 22. Electric push rod; 23. Movable component; 231. Fixed block; 232. U-shaped plate; 233. Slide groove; 234. Adaptor groove; 235. Mounting hole; 24. Elastic component; 241. Fixed plate; 242. Connecting spring; 25. Mounting rod; 26. Rotating component; 261. Fixed tube; 262. Straight rod; 263. Extending square tube; 264. Mounting column; 27. Sliding component; 271. Slider; 272. Cylindrical groove; 273. Limiting tube; 28. Air guide plate; 30. Enlarged component; 31. Mating block; 32. Ventilation slot; 33. Telescopic assembly; 331. Mounting tube; 332. Telescopic spring; 333. Top tube; 34. Stop block; 35. Push plate; 36. Connecting rod; 40. Filter component; 41. Connecting frame; 42. Filter screen; 43. Sliding block; 44. Fixing rod; 45. Scraper. Detailed Implementation

[0019] The following will describe, with reference to the accompanying drawings of the embodiments of the present invention, a temperature-measuring and fire-prevention intelligent power distribution box of the present invention clearly and completely. 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.

[0020] like Figure 1 and Figure 2 As shown, a temperature-measuring and fire-prevention intelligent power distribution box includes a box body 10. Electronic components such as circuit breakers and contactors are installed inside the box body 10. A temperature sensor is fixed on the upper part of the inner cavity of the box body 10. The temperature sensor on the upper part of the inner cavity of the box body 10 detects the ambient temperature of the inner cavity of the box body 10. A fan 11 is fixed on one side of the enclosure 10. The fan 11 is installed on the upper part of one side of the enclosure 10. A module assembly 12 and a mounting box 13 are fixed on the other side of the enclosure 10. The module assembly 12 and the mounting box 13 are installed on the lower part opposite to the fan 11. The module assembly 12 includes a power supply module, a signal processing module and a control module. The temperature sensor and the fan 11 are both connected to the module assembly 12 via electrical signals. When the temperature sensor detects an increase in temperature, it sends a signal to the module assembly 12, and then sends a signal to the enclosure 10 through the module assembly 12 to turn on the fan 11. The fan 11 exhausts air to remove the heat from the interior of the enclosure 10. After receiving the temperature sensor signal, the control module in module component 12 can intelligently control the start-stop and operation status of fan 11, avoiding the frequent start-stop problem caused by load fluctuations or slight changes in ambient temperature of traditional fan 11, and effectively extending the service life of fan 11 motor and relay contacts.

[0021] like Figure 3 As shown, the mounting box 13 is a box with openings on both sides. A ventilation pipe 14 is fixed at one opening of the mounting box 13, corresponding to the inner cavity of the box 10. A filter component 40 is fixed at the other opening, corresponding to the outer side of the box 10, and is used to filter air. Both the ventilation pipe 14 and the filter component 40 are located in the inner cavity of the mounting box 13. A graded ventilation component 20 is fixed between the ventilation pipe 14 and the filter component 40. The ventilation pipe 14, the graded ventilation component 20 and the filter component 40 form a ventilation channel. The graded ventilation component 20 is used to adjust the angle and area of ​​the air intake. Enlargement components 30 are fixed on both sides of the graded ventilation component 20, and the enlargement components 30 are used to increase the air intake area.

[0022] like Figure 4 and Figure 5As shown, the graded ventilation component 20 includes a fixed frame 21 fixedly connected to the ventilation duct 14. The fixed frame 21 is generally parallelogram-shaped with a side inclination angle of 45 degrees. Electric push rods 22 located at the upper and lower parts are fixed on both sides of the fixed frame 21, respectively. One electric push rod 22 is fixed at the upper part, and the other electric push rod 22 is fixed at the lower part. The output ends of the two electric push rods 22 move in opposite directions, and the installation directions of the two electric push rods 22 are opposite. One output end moves upward and the other output end moves downward. Each output end of the electric push rod 22 is fixed with a movable component 23. The movable component 23 moves along the side of the fixed frame 21 with the output end of the electric push rod 22. A set of elastic components 24 are fixed on both sides of the fixed frame 21. Each set of elastic components 24 consists of two symmetrical elastic components 24. The two sets of elastic components 24 are installed in opposite directions, with one set facing upwards and the other facing downwards. Each set of elastic components 24 is provided with a sliding component 27 that slides on the fixed frame 21. The sliding directions of the two sliding components 27 are also opposite. Each sliding component 27 is rotatably mounted with multiple mounting rods 25 via a torsion spring. The rotation angle of the mounting rods 25 is only 45 degrees. Each mounting rod 25 is fixedly mounted with a rotating component 26 that matches the movable component 23. A number of through slots are opened on one side of the fixed frame 21 to facilitate the sliding of the mounting rods 25. Each mounting rod 25 is fixed with a guide plate 28 located in the inner cavity of the fixed frame 21.

[0023] Based on the allowable operating temperature and safety margin of common electrical components in the distribution box, three temperature ranges are set to coordinate with the use of the device. Level 1 warning (55℃~62℃): At this point, the internal temperature has exceeded the "recommended operating temperature" (40℃~50℃) of most components, but has not yet reached the limit. Setting 55℃ as the starting point allows for early intervention to prevent the temperature from continuing to rise. Level 2 high temperature (62~70℃): 62℃ is an important intermediate point—at this point, the contact resistance of copper terminals may begin to deteriorate, and the circuit breaker will be severely derated. Level 3 over-temperature (≥70℃): 70℃ is the "red line" that most electronic components cannot operate for a long time. Part or all of the load must be cut off immediately to prevent fire or insulation breakdown. Therefore, it is set as the trip point for Level 3 over-temperature.

[0024] For example: terminal blocks (copper) (normal operating temperature upper limit is 60℃, permissible limit temperature is 80℃), molded case circuit breakers (normal operating temperature upper limit is 40℃, permissible limit temperature is 70℃), contactors (normal operating temperature upper limit is 55℃, permissible limit temperature is 85℃).

[0025] The first-level warning temperature range, such as Figure 5 As shown, the air guide plate 28 is in a straight position, and the fan 11 is turned on to ensure local convection inside the cabinet 10. When the temperature is in the secondary high-temperature range, such as... Figure 7As shown, two electric push rods 22 drive the movable component 23 on the same side to move a certain distance, causing the rotating component 26 to drive the mounting rod 25 and the air guide plate 28 on the mounting rod 25 to rotate a certain angle. The mounting rod 25 and the air guide plate 28 rotate forty-five degrees, adjusting the air inlet angle so that the air guide plate 28 is tilted downwards, so that the incoming cold air flows upwards through the lower part of the box 10. The cold air rushes downwards from the high place, then turns back upwards and is discharged through the fan 11, carrying away the heat. When the temperature rises to the level three overheating range, such as Figure 9 As shown, when the electric push rod 22 drives the movable component 23 to move again, the mounting rod 25 and the air guide plate 28 on the mounting rod 25, which are mounted on the two sliding components 27, move in opposite directions. The air guide plates 28 on both sides move in opposite directions, and the air guide plate 28 close to the inner cavity side wall of the fixed frame 21 is pressed tightly against the inner cavity side wall of the fixed frame 21 after moving. This gradually increases the distance between the air guide plates 28 moving in the two directions, and increases the spacing between two adjacent air guide plates 28 in the middle, thereby increasing the air intake area. At the same time, with the opening of the expansion component 30, the air intake area is further increased. While the air intake angle is the same, the air intake area is further increased, thereby improving the air flow speed, further improving the heat dissipation effect, and quickly cooling down, buying time to avoid tripping or fire.

[0026] like Figure 6 and Figure 7 As shown, the active component 23 includes a fixed block 231 fixed to the output end of the electric push rod 22. A U-shaped plate 232 that slides on the fixed frame 21 is fixed to one side of the fixed block 231. The two vertical parts of the U-shaped plate 232 are slidably mounted on the fixed frame 21. A set of sliding grooves 233, a set of adapter grooves 234 and a set of mounting holes 235 are provided on the U-shaped plate 232. Each set of sliding grooves 233, adapter grooves 234 and mounting holes 235 consists of two parts and is arranged vertically. The sliding grooves 233 are adapted to the mounting rod 25. The mounting rod 25 slides in the inner cavity of the sliding grooves 233. In the initial state, the mounting rod 25 is located on the upper side of the inner cavity of the sliding grooves 233.

[0027] like Figure 6 As shown, the elastic component 24 includes a fixing plate 241 fixed to the fixing frame 21, and a connecting spring 242 is fixed on the fixing plate 241.

[0028] like Figure 6 and Figure 8As shown, the sliding assembly 27 includes a slider 271 that slides on the fixed frame 21. The slider 271 cooperates with the fixed block 231. After the fixed block 231 moves a certain distance, it will contact the slider 271. When the fixed block 231 moves again, it will drive the slider 271 to move together. A cylindrical groove 272 adapted to the connecting spring 242 is opened on one side of the slider 271. The connecting spring 242 is located in the inner cavity of the cylindrical groove 272 and is fixedly connected to the top wall of the inner cavity of the cylindrical groove 272. The connecting spring 242 is initially in a compressed state, providing tension to the slider 271 and keeping the slider 271 stable. After the slider 271 moves, it can also provide a resetting tension. Two limiting tubes 273 are fixed on one side of the slider 271 and sleeved on the outside of the connecting spring 242. The limiting tubes 273 are in contact with the fixed plate 241 in the initial state and are used to limit the position of the slider 271.

[0029] like Figures 7-9 As shown, the rotating assembly 26 includes a fixed tube 261 fixed on the mounting rod 25. Two symmetrical straight rods 262 are fixed on the outer surface of the fixed tube 261. Each of the two straight rods 262 is fitted with a mounting post 264. The mounting post 264 is fitted on the straight rod 262 and slides on the straight rod 262. An extension square tube 263 adapted to the adapter groove 234 and the mounting hole 235 is rotatably installed on the two mounting posts 264 respectively. One side of the extension square tube 263 is rotatably installed in the mounting hole 235, and the other side of the extension square tube 263 slides in the inner cavity of the adapter groove 234. During the movement of the U-shaped plate 232, the extension square tube 263 inside the mounting hole 235 will move, causing the position of the mounting column 264 to change, which in turn causes the straight rod 262 to rotate, thereby causing the fixed tube 261 to rotate with the mounting rod 25. The mounting rod 25 will then cause the air guide plate 28 fixed on it to rotate at a certain angle.

[0030] like Figures 10-12 As shown, the enlarged component 30 includes a mating block 31 fixedly connected to the fixed frame 21. One side of the mating block 31 is inclined at a 45-degree angle, which is exactly aligned with the inclined surface at the connection point of the fixed frame 21. A ventilation groove 32 is provided on the mating block 31. The ventilation groove 32 is generally in the shape of a parallelogram. Ventilation openings communicating with the inner cavity of the ventilation groove 32 are provided on both sides of the mating block 31. A stop block 34 is slidably installed in the inner cavity of the ventilation groove 32. The stop block 34 has a parallelogram cross section. After moving, it can fit against the top wall of the ventilation groove 32, thereby opening the space between the inner cavity of the ventilation groove 32 and the top of the fixed frame 21, allowing the ventilation openings to ventilate and increasing the ventilation area. The ventilation slot 32 has a telescopic component 33 on its side wall that is adapted to the stop block 34. The side wall of the ventilation slot 32 has a round hole for installing the telescopic component 33, so that the telescopic component 33 is embedded therein. The telescopic component 33 is in the extended state in the normal state, pushing the stop block 34 to make tight contact with the top of the fixed frame 21. A connecting rod 36 is fixed through the stop block 34. The connecting rod 36 passes through the stop block 34, and a through groove for sliding the connecting rod 36 is opened on one side of the mating block 31. A push plate 35 adapted to the U-shaped plate 232 is fixed on the connecting rod 36. During the movement of the U-shaped plate 232, the push plate 35 will be pushed, thereby causing the push plate 35 to move the connecting rod 36 and the stop block 34 on the connecting rod 36.

[0031] like Figure 11 As shown, the telescopic component 33 includes an installation tube 331 embedded in the inner wall of the ventilation slot 32. A top tube 333 is slidably installed in the inner cavity of the installation tube 331. A telescopic spring 332 is fixed between the top tube 333 and the installation tube 331. One end of the top tube 333 is inclined at the same angle as the inclined surface of the stop block 34. After the stop block 34 moves, the top tube 333 enters the inner cavity of the installation tube 331 as a whole. The inclined surface of one end of the top tube 333 is on the same plane as the side wall of the ventilation slot 32.

[0032] like Figure 13 and Figure 14 As shown, the filter component 40 includes a connecting frame 41 fixed to the mounting box 13. One side of the connecting frame 41 is fixedly connected to the fixed frame 21. A filter screen 42 is fixed inside the connecting frame 41. The filter screen 42 is used to filter dust and impurities in the air. Two sliding blocks 43 with opposite directions of movement are fixed on both sides of the connecting frame 41. The two sliding blocks 43 are fixedly connected to the U-shaped plate 232 on the same side. The sliding block 43 on one side moves up with the U-shaped plate 232 on the same side, and the sliding block 43 on the other side moves down with the U-shaped plate 232 on the same side. Each sliding block 43 is fixed with multiple fixing rods 44. Each fixed rod 44 is fixed with a scraper 45 that is in close contact with the surface of the filter screen 42. The scraper 45 has a trapezoidal cross section, with its long side in contact with the filter screen 42. The two inclined surfaces of the scraper 45 can clean the dust on the surface of the filter screen 42 during the up and down movement, preventing dust from clogging the filter screen 42 and affecting the air intake effect. Among them, a fixing rod 44 is installed on the side of the two sliding blocks 43 near the center line of the connecting frame 41. The scrapers 45 on the two fixing rods 44 are in close contact. When the two sliding blocks 43 move in opposite directions, the surface of the filter screen 42 can be cleaned by multiple scrapers 45.

[0033] Working principle: This device is a temperature-measuring and fire-prevention intelligent power distribution box. During use, the temperature sensor installed inside the box 10 monitors the ambient temperature inside the box 10 in real time. Based on the preset three temperature ranges of Level 1 warning (55℃~62℃), Level 2 high temperature (62℃~70℃), and Level 3 over-temperature (≥70℃), it works with the fan 11 and module component 12, and coordinates with the graded ventilation component 20 to achieve intelligent heat dissipation regulation. When the internal temperature of chamber 10 is in the first-level warning range, such as Figure 5 As shown, the air guide plate 28 remains straight, and the fan 11 is turned on to ensure local convection inside the box, perform initial heat dissipation, and prevent the temperature from rising further. When the temperature drops below a certain value of the first-level warning minimum temperature, the fan 11 will automatically stop, avoiding the problem of frequent start and stop of the fan 11 in traditional distribution boxes when the load fluctuates or the ambient temperature changes slightly. When the internal temperature of chamber 10 is in the secondary high-temperature range, such as Figure 7 and Figure 8 As shown, the module component 12 sends a start command to the two electric push rods 22, causing the output ends of the two electric push rods 22 to move in opposite directions. The output ends of the electric push rods 22 push the fixed block 231 to move the U-shaped plate 232 a certain distance. During the movement of the U-shaped plate 232, the extension square tube 263 moves in the inner cavity of the mounting hole 235, causing the extension square tube 263 to slide on the straight rod 262, and causing the straight rod 262 to drive the fixed tube 261 to rotate forty-five degrees, thereby causing the mounting rod 25 to rotate forty-five degrees. The air guide plate 28 on the mounting rod 25 also rotates forty-five degrees, so that the air guide plate 28 is in the same tilt angle as the inclined surface on one side of the fixed frame 21. The air inlet angle is adjusted so that the air guide plate 28 is tilted downward, guiding the incoming cold air to flow upward through the lower part of the box 10, forming an airflow path from high to low and then back upward to be discharged by the fan 11. This improves the air circulation efficiency inside the box and can more effectively remove heat. Compared with the traditional single-direction heat dissipation, it improves the heat exchange effect. As the U-shaped plate 232 moves, the sliding block 43 moves with the U-shaped plate 232, thereby causing multiple scrapers 45 to move a certain distance on the surface of the filter screen 42, cleaning part of the surface area of ​​the filter screen 42 and improving the air circulation effect. When the internal temperature of chamber 10 is in the level 3 over-temperature range, such as Figure 9As shown, based on the adjustment in the secondary high temperature range, the electric push rod 22 drives the movable component 23 to move again, so that the fixed block 231 moves along with the U-shaped plate 232 and the slider 271, thereby moving the mounting rod 25 on the slider 271 and the rotating component 26 on the mounting rod 25 as a whole, thereby moving the air guide plate 28 on the mounting rod 25 and making it close to the inner wall of the fixed frame 21 on the moving side, thereby reducing the projected area of ​​the air guide plate 28 in the inner cavity of the fixed frame 21, reducing the obstruction of air intake. As the two sliders 271 move away from each other, the distance between the two air guide plates 28 that are close to each other in the middle gradually increases. After reducing the obstruction of the air guide plates 28 on both sides, the air intake area increases. At the same time, such as Figure 12 As shown, during the movement of the U-shaped plate 232, the push plate 35 on the moving side will be pushed to move, causing the push plate 35 to move along the connecting rod 36. This causes the stop block 34 on the connecting rod 36 to move within the ventilation slot 32 cavity, gradually moving the stop block 34 away from the position that is tightly attached to one side of the fixed frame 21. The stop block 34 then enters the ventilation slot 32 cavity and contacts the top wall of the ventilation slot 32 cavity, thereby allowing ventilation through the vent on the mating block 31. This further increases the air intake area and significantly increases the airflow speed while maintaining the air intake angle, achieving rapid cooling. During the movement of the U-shaped plate 232, such as Figure 14 As shown, the sliding block 43 moves with the U-shaped plate 232, causing multiple scrapers 45 to move on the surface of the filter screen 42. The multiple scrapers 45 can clean the entire surface of the filter screen 42, thoroughly removing dust and impurities from the surface of the filter screen 42, ensuring unobstructed air intake, effectively preventing dust from clogging the filter screen and affecting the air intake effect, and ensuring the continuous and efficient operation of the heat dissipation system. When the temperature drops below a certain value below the minimum warning temperature for Level 1, the control module in module component 12 will issue a command to shut down the fan 11, reset the electric push rod 22, moving component 23, sliding component 27, expanding component 30, sliding block 43 and other components, restore the air guide plate 28 to a straight state, close the vent 34, and return the scraper 45 to its initial position. The entire system will then return to standby mode, waiting for the next temperature change response. It should be noted that in the Level 3 over-temperature range, the device can only operate for a very short time. If the temperature cannot drop to a certain value within the specified time, the device will automatically trip to prevent fire.

[0034] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the present invention's technical concept of a temperature-measuring and fire-prevention intelligent power distribution box, should be covered within the scope of protection of the present invention.

Claims

1. A temperature-measuring and fire-prevention intelligent power distribution box, comprising a box body (10), characterized in that, A temperature sensor is fixed to the upper part of the inner cavity of the box (10). A fan (11) is fixed to one side of the box (10). A module assembly (12) and a mounting box (13) are fixed to the other side of the box (10). A ventilation pipe (14) is fixed to one side of the mounting box (13), and a filter component (40) is fixed to the other side of the opening. A graded ventilation component (20) is fixed between the ventilation pipe (14) and the filter component (40). The graded ventilation component (20) includes a fixed frame (21) fixedly connected to the ventilation pipe (14). Electric push rods (22) located at the upper and lower parts are fixed on both sides of the fixed frame (21). A movable component (23) is fixed at the output end of each electric push rod (22). A set of elastic components (24) is fixed on both sides of the fixed frame (21). A sliding component (27) is provided on each set of elastic components (24). Multiple mounting rods (25) are rotatably mounted on each sliding component (27) by a torsion spring. A rotating component (26) is fixedly mounted on each mounting rod (25). A guide plate (28) is fixed on each mounting rod (25). The two electric push rods (22) drive the movable component (23) on the same side to move a certain distance. The rotating component (26) cooperates with the mounting rod (25) to make the air guide plate (28) rotate a certain angle. When the movable component (23) moves again, the air guide plates (28) on both sides move in opposite directions, increasing the distance between the two adjacent air guide plates (28) in the middle.

2. The temperature-measuring and fire-prevention intelligent distribution box according to claim 1, characterized in that, The active component (23) includes a fixed block (231) fixed to the output end of the electric push rod (22). A U-shaped plate (232) that slides on the fixed frame (21) is fixed on one side of the fixed block (231). A set of sliding grooves (233), a set of adapter grooves (234) and a set of mounting holes (235) are provided on the U-shaped plate (232). The sliding grooves (233) are adapted to the mounting rod (25).

3. The temperature-measuring and fire-prevention intelligent distribution box according to claim 1, characterized in that, The elastic component (24) includes a fixing plate (241) fixed to the fixing frame (21), and a connecting spring (242) is fixed on the fixing plate (241).

4. The temperature-measuring and fire-prevention intelligent distribution box according to claim 3, characterized in that, The sliding assembly (27) includes a slider (271) that slides on a fixed frame (21). A cylindrical groove (272) adapted to a connecting spring (242) is provided on one side of the slider (271). Two limiting tubes (273) are fixed on one side of the slider (271) and sleeved on the outside of the connecting spring (242).

5. A temperature-measuring and fire-prevention intelligent distribution box according to claim 2, characterized in that, The rotating assembly (26) includes a fixed tube (261) fixed on the mounting rod (25). Two symmetrical straight rods (262) are fixed on the outer surface of the fixed tube (261). Mounting posts (264) are sleeved on both straight rods (262). Extended square tubes (263) that are adapted to the matching groove (234) and mounting hole (235) are rotatably mounted on the two mounting posts (264).

6. The temperature-measuring and fire-prevention intelligent distribution box according to claim 2, characterized in that, The graded ventilation component (20) has an expansion component (30) fixed on both sides. The expansion component (30) includes a mating block (31) fixedly connected to the fixed frame (21). The mating block (31) has a ventilation groove (32). The mating block (31) has ventilation openings on both sides that communicate with the inner cavity of the ventilation groove (32). The inner cavity of the ventilation groove (32) is slidably installed with a stop block (34). The side wall of the ventilation groove (32) is provided with a telescopic component (33) adapted to the stop block (34). A connecting rod (36) is fixed through the stop block (34). A push plate (35) adapted to the U-shaped plate (232) is fixed on the connecting rod (36).

7. A temperature-measuring and fire-prevention intelligent distribution box according to claim 6, characterized in that, The telescopic assembly (33) includes an installation tube (331) embedded in the inner wall of the ventilation slot (32), a top tube (333) is slidably installed in the inner cavity of the installation tube (331), and a telescopic spring (332) is fixed between the top tube (333) and the installation tube (331).

8. A temperature-measuring and fire-prevention intelligent distribution box according to claim 2, characterized in that, The filter component (40) includes a connecting frame (41) fixed on the mounting box (13). A filter screen (42) is fixed inside the connecting frame (41). Sliding blocks (43) with opposite directions of movement are fixed on both sides of the connecting frame (41). The two sliding blocks (43) are fixedly connected to the U-shaped plate (232) on the same side. Multiple fixing rods (44) are fixed on each sliding block (43). A scraper (45) that is in close contact with the surface of the filter screen (42) is fixed on each fixing rod (44).

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