Low-voltage cable distribution box with automatic drainage dehumidification structure

Abstract

This invention discloses a low-voltage cable junction box with an automatic drainage and dehumidification structure, including a junction box body. A dehumidification chamber is installed at the top of the junction box body. A semiconductor heating element is installed inside the dehumidification chamber, dividing the internal space of the dehumidification chamber into a condensation chamber and a heat dissipation chamber. The two sides of the semiconductor heating element are a cold surface and a hot surface, respectively. The cold surface is placed in the condensation chamber, and the hot surface is placed in the heat dissipation chamber. This invention uses the cold surface of the semiconductor heating element to condense water vapor in the air into liquid water. Simultaneously, multiple condensation screens are provided. A first heat-conducting surface quickly transfers cooling energy to the condensation screens, cooling them below the dew point temperature. When air flows through, water vapor more easily condenses into liquid water, adhering to the surface of the condensation screens and dripping to the bottom of the condensation chamber. This effectively reduces the humidity inside the junction box, reduces the risk of electrical components getting damp, and extends the service life of the equipment.

Description

Technical Field

[0001] This invention relates to the field of low-voltage cable junction box technology, specifically a low-voltage cable junction box with an automatic drainage and dehumidification structure. Background Technology

[0002] Low-voltage cable junction boxes, as key power distribution equipment in power systems, are widely used in urban power grids, industrial parks, public buildings, and residential areas. Their core function is to flexibly distribute electrical energy through branch cables to meet the power needs of multiple users or devices. However, since junction boxes are usually installed outdoors and exposed to natural factors such as humidity, rain, and temperature differences for a long time, their internal electrical components are susceptible to moisture corrosion, leading to decreased insulation performance, frequent short-circuit faults, and even safety accidents such as fires. According to statistics, cable junction box failures caused by humidity account for more than 40%, becoming one of the main hidden dangers affecting the safe operation of the power grid.

[0003] A search revealed Chinese Patent Publication No. CN211629795U, which discloses a low-voltage cable junction box, comprising a low-voltage cable junction box body, a fan, a mesh frame plate, guide posts, a first insulating seat, a conductive post, a second insulating seat, a conductive seat, a buffer spring, a placement net, and a desiccant. The fan is installed on the left side wall of the low-voltage cable junction box body, the mesh frame plate is installed inside the low-voltage cable junction box body, the placement net is fixed inside the mesh frame plate, the desiccant is placed inside the placement net, the guide post is installed at the bottom of the mesh frame plate, the buffer spring is sleeved on the annular side of the guide post, the first insulating seat is fixed inside the low-voltage cable junction box body, the conductive post is installed on the lower end face of the first insulating seat, the second insulating seat is fixed on the inner walls of opposite sides of the low-voltage cable junction box body, and the conductive seat is installed inside the second insulating seat.

[0004] The above-mentioned technical solution uses desiccant placed inside the grid plate as the main dehumidification method, combined with fans installed on the side wall of the box to accelerate air circulation. However, this passive dehumidification design has significant drawbacks. First, the desiccant needs to be replaced manually every time, resulting in high long-term maintenance costs. Moreover, if it is not replaced in time after it becomes saturated with moisture, it will directly lose its dehumidification efficiency and cause the humidity inside the box to rebound. Second, the dehumidification efficiency of the fan drops sharply in high humidity environments such as the rainy season, making it impossible to stably control the humidity inside the box at the safety threshold of electrical components. The dehumidification and drainage effect is also poor. Therefore, it is necessary to design a low-voltage cable junction box with an automatic drainage and dehumidification structure to improve the above problems. Summary of the Invention

[0005] To overcome the above-mentioned defects, the present invention provides a low-voltage cable junction box with an automatic drainage and dehumidification structure, which aims to solve the problem of poor dehumidification and drainage effect in the existing dynamic dehumidification design that uses desiccants and fans to accelerate air circulation.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A low-voltage cable junction box with an automatic drainage and dehumidification structure includes a junction box body, a dehumidification box body installed at the top of the junction box body, a portion of the dehumidification box body being placed inside the junction box body, and another portion being placed outside the junction box body.

[0008] The dehumidification chamber is equipped with a semiconductor heating and cooling plate, which divides the internal space of the dehumidification chamber into a condensation chamber and a heat dissipation chamber. The two sides of the semiconductor heating and cooling plate are a cold side and a hot side, respectively. The cold side is placed in the condensation chamber and the hot side is placed in the heat dissipation chamber.

[0009] The dehumidification chamber has an air inlet hopper and an air outlet hopper on both sides, which are connected to the condensation chamber. The air inlet of the air inlet hopper is fixedly connected to an air inlet pipe, and multiple air intake ports are provided along its length. The air outlet of the air outlet hopper is fixedly connected to an exhaust pipe, and a fan is fixedly connected to the exhaust pipe. Multiple air outlet nozzles are also rotatably connected along the length of the exhaust pipe. An oscillating component is provided at the air outlet nozzle, and the oscillating component is used to drive the air outlet nozzle to oscillate up and down.

[0010] The outer sides of the cold and hot surfaces of the semiconductor heating element are respectively wrapped with a first temperature-conducting surface and a second temperature-conducting surface. Multiple condensation meshes are fixedly connected at equal intervals on the outer wall of the first temperature-conducting surface inside the condensation chamber. A partition assembly is also provided inside the condensation chamber at the condensation meshes to extend the path of air through the condensation meshes.

[0011] The dehumidification chamber has a heat dissipation plate installed on the inner wall of the heat dissipation chamber. Multiple heat-conducting fins are fixedly connected to the heat dissipation plate and the second heat-conducting surface at equal intervals. A condensate delivery mechanism is provided between the heat dissipation plate and the condensation chamber.

[0012] Preferably, a plurality of heat dissipation fins passing through the dehumidification box are fixedly connected to the outer wall of the heat dissipation plate.

[0013] Preferably, the heat sink is provided with a water supply channel inside, the water supply channel is a multi-segment U-shaped loop, the top of the water supply channel is provided with a water inlet pipe that penetrates the heat sink and the dehumidification box, and the bottom of the water supply channel is provided with a drain pipe that penetrates the heat sink and the dehumidification box.

[0014] Preferably, a drain outlet is provided at the bottom of the condensation chamber on the dehumidification box, and a water collection cover is fixedly connected to the outer wall of the dehumidification box outside the drain outlet.

[0015] Preferably, a water guiding slope is provided at the bottom of the condenser chamber, and the height of the water guiding slope gradually decreases along the first heat guiding surface towards the drain outlet.

[0016] Preferably, the condensate conveying mechanism includes a lifting pipe fixedly connected to the outer wall of the dehumidifier box, a conveying auger rotatably connected inside the lifting pipe, a motor installed at the bottom end of the lifting pipe, the output end of the motor fixedly connected to one end of the conveying auger, a first conveying pipe fixedly connected between the water collection cover and the bottom end of the lifting pipe, and a second conveying pipe fixedly connected between the water inlet pipe and the top end of the lifting pipe.

[0017] Preferably, the partition assembly includes multiple upper partitions and lower partitions, with an upper partition or a lower partition disposed between two adjacent condensation nets. The top of the upper partition is fixedly connected to the top of the condensation chamber, and a gap is left between the bottom of the upper partition and the bottom of the condensation chamber. The bottom of the lower partition is fixedly connected to the bottom of the condensation chamber, and a gap is left between the top of the lower partition and the top of the condensation chamber.

[0018] Preferably, one end of the air inlet pipe extends into the air inlet hopper and is fixedly connected to a diverter.

[0019] Preferably, the swing assembly includes a guide sleeve plate fixedly connected to the bottom of the junction box, a movable plate slidably connected inside the guide sleeve plate, a linkage column fixedly connected to each of the air outlet nozzles, a linkage groove opened at the linkage column on the movable plate, the linkage groove being a horizontally arranged waist-shaped groove, and one end of the linkage column being placed in the linkage groove.

[0020] Preferably, the swing assembly further includes a ventilation hood fixedly connected to the exhaust pipe, a rotating shaft rotatably connected inside the ventilation hood, a fan wheel fixedly sleeved on the outer side of the rotating shaft inside the ventilation hood, one end of the rotating shaft extending to the outside of the ventilation hood and fixedly connected to a turntable, a guide post fixedly connected to the edge of the turntable away from the rotating shaft, a guide plate fixedly connected to the top of the moving plate, a guide groove opened along the length direction on the guide plate, and one end of the guide post placed in the guide groove.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. This invention uses the cold surface of a semiconductor heating and cooling plate to condense water vapor in the air into liquid water. Simultaneously, multiple condensation meshes are installed. The first heat-conducting surface quickly transfers cooling energy to the condensation meshes, cooling them below the dew point temperature. As air flows through, water vapor more easily condenses into liquid water, adhering to the surface of the condensation meshes and dripping to the bottom of the condensation chamber. This effectively reduces the humidity inside the junction box, reduces the risk of electrical components getting damp, and extends the service life of the equipment. Multiple upper and lower baffles inside the condensation chamber extend the airflow path, allowing for longer contact time and a larger contact area between the air and the condensation meshes, which facilitates the full condensation of water vapor in the air, thereby improving dehumidification efficiency. At the same time, it reduces turbulence and eddies in the air within the condensation chamber, improving the operational stability of the equipment.

[0023] 2. This invention features a water supply channel inside the heat sink. Condensate is transported to the inlet pipe of the heat sink via a riser pipe and enters the water supply channel. Multiple U-shaped loops extend the flow path of the condensate within the heat sink. During its flow, the condensate absorbs heat from the heat sink, thus cooling it. After absorbing heat, the condensate's temperature rises, and it is discharged from the heat sink through a drain pipe, enabling the reuse of condensate. This improves energy efficiency, significantly enhances the heat dissipation effect of the heat sink, and helps maintain the semiconductor heating element at a suitable temperature, improving its efficiency and stability.

[0024] 3. In this invention, the dehumidified cold air enters the exhaust duct through the air outlet hopper. Multiple air outlet nozzles on the exhaust duct discharge the treated cold air and blow it towards the electrical components inside the junction box, improving the heat dissipation effect on the electrical components. Furthermore, the oscillating component set at the air outlet nozzle is driven by the exhaust airflow. When airflow passes through the exhaust duct, the airflow impacts the impeller, driving the rotating shaft to rotate. This, in turn, causes the moving plate to move up and down in a linear motion through structures such as guide columns and guide grooves, driving the air outlet nozzle to oscillate up and down. No additional power supply or control device is required, reducing energy consumption and system complexity, and meeting energy conservation and environmental protection requirements. At the same time, the oscillation of the air outlet nozzle causes the direction of the exhaust airflow to change continuously, forming a fan-shaped wide-angle coverage air outlet area, expanding the effective ventilation range, avoiding local dead corners, and improving the heat dissipation effect on the electrical components. Attached Figure Description

[0025] Figure 1 A first-view structural diagram of a low-voltage cable junction box with an automatic drainage and dehumidification structure.

[0026] Figure 2 A schematic diagram of the overall structure of a low-voltage cable junction box with an automatic drainage and dehumidification system from a second perspective.

[0027] Figure 3 This is a structural diagram of the dehumidification chamber, air inlet duct, and air outlet duct.

[0028] Figure 4 This is a schematic diagram of the three-dimensional structure of the dehumidifier box;

[0029] Figure 5 This is a top view of the dehumidifier cabinet.

[0030] Figure 6 for Figure 5 Schematic diagram of the AA-direction cross-section structure;

[0031] Figure 7 for Figure 5 Schematic diagram of the BB-direction cross-sectional structure in the middle;

[0032] Figure 8 This is a schematic diagram of the cross-sectional structure of the heat sink.

[0033] Figure 9 This is a schematic diagram of the condensate delivery mechanism.

[0034] Figure 10 This is a schematic diagram of the swing assembly structure;

[0035] Figure 11 This is a schematic diagram of the ventilation hood, impeller, turntable, and guide plate.

[0036] In the diagram: 1. Distribution box body; 2. Dehumidification box body; 201. Air inlet duct; 202. Air outlet duct; 203. Drain outlet; 204. Water collection cover; 3. Semiconductor heating and cooling plate; 301. Cold surface; 302. Hot surface; 303. First temperature conducting surface; 304. Second temperature conducting surface; 4. Condensation mesh; 5. Heat conducting plate; 6. Heat dissipation plate; 601. Heat dissipation fins; 602. Water supply channel; 603. Water inlet pipe; 604. Drain pipe; 7. Baffle assembly; 701. Upper baffle; 702. Lower baffle; 8. Condensate delivery mechanism; 801. Lifting pipe ; 802, Conveying auger; 803, Motor; 804, First conveying pipe; 805, Second conveying pipe; 9, Air inlet pipe; 901, Air inlet; 10, Diverter joint; 11, Exhaust pipe; 12, Fan; 13, Air outlet nozzle; 1301, Linkage column; 14, Swing assembly; 1401, Guide sleeve; 1402, Moving plate; 1403, Linkage groove; 1404, Guide plate; 1405, Ventilation hood; 1406, Rotating shaft; 1407, Impeller; 1408, Turntable; 1409, Guide column; 1410, Guide groove. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] Example: Please refer to Figures 1-11 This embodiment provides a low-voltage cable junction box with an automatic drainage and dehumidification structure, including a junction box body 1. A dehumidification chamber 2 is installed at the top of the junction box body 1. Part of the dehumidification chamber 2 is placed inside the junction box body 1, and the other part is placed outside the junction box body 1. A semiconductor heating and cooling plate 3 is installed inside the dehumidification chamber 2. The semiconductor heating and cooling plate 3 divides the internal space of the dehumidification chamber 2 into a condensation chamber and a heat dissipation chamber. The two sides of the semiconductor heating and cooling plate 3 are a cold surface 301 and a hot surface 301, respectively. Surface 302, cold surface 301 is placed in the condensation chamber, and hot surface 302 is placed in the heat dissipation chamber. Air inlet duct 201 and air outlet duct 202, communicating with the condensation chamber, are respectively provided on both sides of the dehumidification chamber 2. An air inlet pipe 9 is fixedly connected to the air inlet of the air inlet duct 201. Multiple air inlet ports 901 are provided along the length of the air inlet pipe 9, evenly distributed inside the distribution box 1. An exhaust pipe 11 is fixedly connected to the air outlet of the air outlet duct 202. A fan 12 is fixedly connected to the top, and multiple air outlet nozzles 13 are rotatably connected to the exhaust pipe 11 along its length. The air outlet nozzles 13 are linked with the exhaust pipe 11 and can rotate up and down on the exhaust pipe 11. The multiple air outlet nozzles 13 are also evenly distributed inside the junction box 1. When dehumidifying the inside of the junction box 1, the fan 12 is started and draws in air from the junction box 1 through multiple air inlets 901 on the air inlet pipe 9. The drawn-in air enters the condensation chamber of the dehumidification box 2 through the air inlet hopper 201. In the condensation chamber, the air passes through the cold surface 301 of the semiconductor heating and cooling plate 3. The temperature of the cold surface 301 is low, which causes the water vapor in the air to condense into liquid water, achieving the dehumidification effect. The air is also condensed to form cold air. The dehumidified cold air enters the exhaust pipe 11 through the air outlet hopper 202. The multiple air outlet nozzles 13 on the exhaust pipe 11 discharge the treated cold air and blow it towards the electrical components inside the junction box 1, improving the heat dissipation effect on the electrical components.

[0039] In this embodiment, a humidity sensor is installed inside the junction box 1. The humidity sensor can monitor the humidity level inside the junction box 1 in real time and provide accurate environmental data, which helps to understand the humidity changes inside the box in a timely manner. The humidity sensor, fan 12, semiconductor heating element 3 are electrically connected to the control module of the low-voltage cable junction box. When the humidity inside the junction box 1 reaches a preset threshold, the fan 12 and semiconductor heating element 3 are automatically started to achieve the dehumidification effect inside the low-voltage cable junction box. The control method of this invention is controlled by the control module. The control program of the control module can be easily implemented by those skilled in the art through simple programming. Therefore, the control method and circuit connection will not be explained in detail in this invention.

[0040] In this embodiment, as Figure 6As shown, the outer side of the cold surface 301 of the semiconductor heating element 3 is wrapped with a first thermally conductive surface 303. Multiple condensation meshes 4 are fixedly connected at equal intervals on the outer wall of the first thermally conductive surface 303 inside the condensing chamber. The multiple condensation meshes 4 are arranged in the condensing chamber along the airflow direction. After the air enters the condensing chamber, it comes into contact with the first thermally conductive surface 303 wrapped with the cold surface 301 of the semiconductor heating element 3. The first thermally conductive surface 303 has good thermal conductivity and can quickly transfer the cooling energy to the condensation meshes 4. The condensation meshes 4 are cooled to below the dew point temperature. When the air flows through the condensation meshes 4, the water vapor in the air comes into contact with the condensation meshes 4 and condenses into liquid water, which adheres to the surface of the condensation meshes 4. The water droplets condensed on the condensation meshes 4 gradually increase and drip to the bottom of the condensing chamber under the action of gravity, thereby achieving the dehumidification effect, reducing the humidity inside the junction box, reducing the risk of electrical components getting damp, and extending the service life of the equipment.

[0041] In this embodiment, as Figure 7 As shown, one end of the air inlet pipe 9 extends into the air inlet hopper 201 and is fixedly connected to a diverter 10. The diverter 10 has multiple diverter ports arranged circumferentially. The cross-section of the air inlet hopper 201 gradually increases along the direction of the air inlet pipe 9 toward the dehumidification chamber 2. Air flows along the air inlet pipe 9 and enters the air inlet hopper 201 through the diverter 10. The multiple diverter ports arranged circumferentially on the diverter 10 evenly distribute the incoming air to different directions and areas. The diverted air enters the air inlet hopper 201. Since the cross-section of the air inlet hopper 201 gradually increases along the direction of the air inlet pipe toward the dehumidification chamber, the air gradually diffuses during the flow process, and the flow velocity slows down, allowing the air to diffuse to multiple areas of the condensation chamber. This facilitates full contact between the air and the condensation mesh 4 in the condensation chamber, improving the efficiency of condensation dehumidification.

[0042] In this embodiment, as Figure 7 As shown, a baffle assembly 7 is also installed inside the condenser chamber at the condensation net 4 to extend the path of air through the condensation net 4. The baffle assembly 7 includes multiple upper baffles 701 and lower baffles 702. An upper baffle 701 or a lower baffle 702 is installed between two adjacent condensation nets 4. The top of the upper baffle 701 is fixedly connected to the top of the condenser chamber, and a gap is left between the bottom of the upper baffle 701 and the bottom of the condenser chamber. The bottom of the lower baffle 702 is fixedly connected to the bottom of the condenser chamber, and a gap is left between the top of the lower baffle 702 and the top of the condenser chamber. Air flows through the gaps. The upper baffles 701 and lower baffles 702 extend the airflow path in the condenser chamber, allowing for a longer contact time and a larger contact area between the air and the condensation net. This facilitates the full condensation of water vapor in the air, thereby improving dehumidification efficiency. The upper baffles 701 and lower baffles 702 also guide the airflow, reducing turbulence and eddies in the air within the condenser chamber and improving the operational stability of the equipment.

[0043] In this embodiment, as Figure 6 As shown, the hot surface 302 of the semiconductor heating element 3 is wrapped with a second thermally conductive surface 304. A heat sink 6 is installed on the inner wall of the heat dissipation chamber inside the dehumidification chamber 2. Several heat dissipation fins 601 passing through the dehumidification chamber 2 are fixedly connected to the outer wall of the heat sink 6. Multiple heat-conducting plates 5 are fixedly connected at equal intervals between the heat sink 6 and the second thermally conductive surface 304. During operation, the hot surface 302 of the semiconductor heating element 3 generates heat. This heat is first absorbed by the second thermally conductive surface 304 wrapped with the hot surface. The heat absorbed by the second thermally conductive surface 304 is conducted through the multiple heat-conducting plates 5 between the heat sink 6 and the second thermally conductive surface 304, and the heat is quickly transferred from the second thermally conductive surface 304 to the heat sink 6. The heat is then dissipated to the outside through the heat dissipation fins 601.

[0044] In this embodiment, the first thermal conductive surface 303, the second thermal conductive surface 304, and the heat-conducting sheet 5 can be made of materials with high temperature conductivity, such as copper, aluminum, or aluminum alloys.

[0045] In this embodiment, as Figure 6 , Figure 8 and Figure 9 As shown, the heat sink 6 has a water supply channel 602 inside. The water supply channel 602 is a multi-segment U-shaped loop. The top of the water supply channel 602 is provided with an inlet pipe 603 that penetrates the heat sink 6 and the dehumidification box 2. The bottom of the water supply channel 602 is provided with a drain pipe 604 that penetrates the heat sink 6 and the dehumidification box 2.

[0046] A drain outlet 203 is provided at the bottom of the condensation chamber on the dehumidification box 2, and a water collection cover 204 is fixedly connected to the outer wall of the dehumidification box 2 outside the drain outlet 203.

[0047] A condensate conveying mechanism 8 is provided between the heat dissipation plate 6 and the condensation chamber. The condensate conveying mechanism 8 includes a lift pipe 801 fixedly connected to the outer wall of the dehumidification box 2. A conveying auger 802 is rotatably connected inside the lift pipe 801. A motor 803 is installed at the bottom end of the lift pipe 801. The motor 803 is also electrically connected to the control module of the low-voltage cable junction box. The output end of the motor 803 is fixedly connected to one end of the conveying auger 802. A first conveying pipe 804 is fixedly connected between the water collection cover 204 and the bottom end of the lift pipe 801. A second conveying pipe 805 is fixedly connected between the water inlet pipe 603 and the top end of the lift pipe 801.

[0048] Specifically, water vapor in the air inside the condenser chamber condenses into condensate, which collects at the bottom of the chamber. The condensate flows out through the drain outlet 203 on the dehumidifier housing 2 and is collected by the water collection hood 204. The condensate collected by the water collection hood 204 is transported to the inside of the riser pipe 801 through the first conveying pipe 804. The conveying auger 802 inside the riser pipe 801 rotates under the drive of the motor 803, lifting the condensate from the bottom to the top of the riser pipe 801. After being lifted to the top of the riser pipe 801, the condensate is transported to the water inlet pipe 603 of the heat sink 6 through the second conveying pipe 805. The condensate then enters the water delivery channel 602 inside the heat sink 6 through the water inlet pipe 603. The water supply channel 602 is designed as a multi-segment U-shaped loop, which extends the flow path of condensate in the heat sink 6. During the flow, the condensate absorbs heat from the heat sink 6, thus cooling the heat sink 6. After absorbing heat, the temperature of the condensate rises and it is discharged from the heat sink 6 through the drain pipe 604, and finally discharged out of the dehumidification chamber 2. By using the condensate to cool the heat sink 6, the condensate is reused, which improves energy efficiency. The condensate flows in the water supply channel 602 inside the heat sink 6, absorbing and carrying away a large amount of heat, which significantly enhances the heat dissipation effect of the heat sink 6. This helps to keep the semiconductor heating element 3 working at a suitable temperature, improving its working efficiency and stability.

[0049] Furthermore, a water guiding slope is provided at the bottom of the condenser chamber. The height of the water guiding slope gradually decreases along the first heat-conducting surface 303 towards the drain outlet 203. The water guiding slope prevents condensate from accumulating in the condenser chamber and allows the condensate to flow quickly and smoothly to the drain outlet 203, thus improving drainage efficiency.

[0050] In this embodiment, as Figure 10 and Figure 11As shown, an oscillating assembly 14 is provided at the air outlet nozzle 13. The oscillating assembly 14 is used to drive the air outlet nozzle 13 to oscillate up and down. The oscillating assembly 14 includes a guide sleeve plate 1401 fixedly connected to the bottom of the inside of the distribution box 1. A moving plate 1402 is slidably connected inside the guide sleeve plate 1401. The guide sleeve plate 1401 and the moving plate 1402 are vertically arranged. The moving plate 1402 can slide along the length of the guide sleeve plate 1401. A linkage column 1301 is fixedly connected to each air outlet nozzle 13. A linkage groove 1403 is opened on the moving plate 1402 at the linkage column 1301. The linkage groove 1403 is a horizontally arranged waist-shaped groove. One end of the linkage column 1301 The swing assembly 14, placed within the linkage slot 1403, also includes a ventilation hood 1405 fixedly connected to the exhaust pipe 11. The ventilation hood 1405 communicates with the exhaust pipe 11. A rotating shaft 1406 is rotatably connected inside the ventilation hood 1405. A fan wheel 1407 is fixedly sleeved on the outer side of the rotating shaft 1406 inside the ventilation hood 1405. One end of the rotating shaft 1406 extends to the outside of the ventilation hood 1405 and is fixedly connected to a turntable 1408. A guide post 1409 is fixedly connected to the edge of the turntable 1408 away from the rotating shaft 1406. A guide plate 1404 is fixedly connected to the top of the moving plate 1402. The guide plate 1404 is horizontally arranged, with its length direction... A guide groove 1410 is provided, and one end of the guide post 1409 is placed in the guide groove 1410. When airflow passes through the exhaust pipe 11, the airflow enters the ventilation hood 1405 and impacts the impeller 1407, driving the impeller to rotate around the rotating shaft 1406. The rotating shaft 1406 drives the fixedly connected turntable 1408 to rotate synchronously, causing the guide post 1409 on the edge of the turntable 1408 to make a circular motion. The guide post 1409 slides in the guide groove 1410 of the guide plate 1404. Since the guide groove 1410 is a horizontal waist-shaped groove, the circular motion of the guide post 1409 is converted into the up-and-down reciprocating linear motion of the moving plate 1402. The moving plate 1402 moves along the vertical direction of the guide sleeve 1401. The sliding plate 1402 has a linkage groove 1403 that engages with the linkage column 1301 of the air outlet nozzle 13. When the sliding plate 1402 moves up and down, the linkage column 1301 slides in the linkage groove 1403, driving the air outlet nozzle 13 to swing back and forth. The swing of the air outlet nozzle 13 causes the direction of the exhaust airflow to change continuously, forming a fan-shaped wide-angle air outlet area, expanding the effective ventilation range. The reciprocating swing of the air outlet nozzle 13 allows the airflow to cover a wider area, avoiding local dead corners and improving the heat dissipation effect on electrical components. Furthermore, the swing component 14 is driven by the exhaust airflow, requiring no additional power supply or control device, reducing energy consumption and system complexity, and meeting the requirements of energy conservation and environmental protection.

[0051] Working principle: The humidity sensor installed inside the junction box 1 monitors the internal humidity in real time. When the humidity exceeds the preset threshold, the control module automatically starts the fan 12, the semiconductor heating element 3, and the motor 803. After the semiconductor heating element 3 is powered on, the cold surface 301 cools down to below the dew point, and the hot surface 302 heats up simultaneously, forming a temperature difference between the condensation chamber and the heat dissipation chamber. The fan 12 draws in air from the junction box 1 through multiple evenly distributed air inlets 901 on the air inlet pipe 9. The flow divider 10 connected to the end of the air inlet pipe 9 evenly distributes the air to the air inlet hopper 201 through the circumferential flow divider 10, so that the air is evenly diffused into the condensation chamber. After the air enters the condensation chamber, it passes through multiple condensation nets 4, causing the water vapor in the air to condense into liquid water. Furthermore, the staggered arrangement of the upper partition 701 and the lower partition 702 in the partition assembly 7 extends the air circulation path, increases the contact time between the air and the condensation nets 4, and improves the condensation efficiency.

[0052] The second heat-conducting surface 304 on the outer side of the hot surface 302 of the semiconductor heat sink 3 transfers heat to the heat sink 6 through the heat-conducting sheet 5. The heat sink fins 601 diffuse the heat to the external environment, and the condensate collects along the water guide slope to the drain outlet 203 at the bottom of the condensation chamber. After being collected by the water collection cover 204, it enters the riser pipe 801 through the first conveying pipe 804. The motor 803 drives the conveying auger 802 to lift the condensate to the top and inputs it into the water conveying channel 602 of the heat sink 6 through the second conveying pipe 805. The condensate flows in the U-shaped loop water conveying channel 602 of the heat sink 6, absorbs the heat of the heat sink 6 and rises in temperature, and is finally discharged through the drain pipe 604.

[0053] The dehumidified cool air enters the exhaust duct 11 through the air outlet 202 and is sprayed out through multiple air outlet nozzles 13 toward the electrical components inside the junction box 1. When airflow passes through the exhaust duct 11, the airflow enters the ventilation hood 1405 and impacts the impeller 1407, driving the impeller to rotate around the rotating shaft 1406. The rotating shaft 1406 drives the fixedly connected turntable 1408 to rotate synchronously, causing the guide posts 1409 on the edge of the turntable 1408 to make circular motion. The guide posts 1409 slide in the guide groove 1410 of the guide plate 1404. Since the guide groove 1410 is a horizontal waist-shaped groove, the guide... The circular motion of the guide post 1409 is converted into the reciprocating linear motion of the moving plate 1402. The moving plate 1402 slides along the vertical direction of the guide sleeve 1401. The linkage groove 1403 on the moving plate 1402 cooperates with the linkage post 1301 of the air outlet nozzle 13. When the moving plate 1402 moves up and down, the linkage post 1301 slides in the linkage groove 1403, driving the air outlet nozzle 13 to swing up and down. The swing of the air outlet nozzle 13 causes the direction of the exhaust airflow to change continuously, forming a fan-shaped wide-angle covered air outlet area, which improves the heat dissipation effect on electrical components.

[0054] The above embodiments are preferred implementations of the present invention. In addition, the present invention can be implemented in other ways. Any obvious substitutions without departing from the concept of the present technical solution are within the protection scope of the present invention.

Claims

1. A low voltage cable distribution box having an automatic drain dehumidifying structure, characterized by, It includes a junction box (1), and a dehumidification box (2) is installed at the top of the junction box (1). Part of the dehumidification box (2) is placed inside the junction box (1), and the other part is placed outside the junction box (1). The dehumidification chamber (2) is equipped with a semiconductor heating element (3). The semiconductor heating element (3) divides the internal space of the dehumidification chamber (2) into a condensation chamber and a heat dissipation chamber. The two sides of the semiconductor heating element (3) are a cold surface (301) and a hot surface (302), respectively. The cold surface (301) is placed in the condensation chamber, and the hot surface (302) is placed in the heat dissipation chamber. The dehumidification box (2) is provided with an air inlet hopper (201) and an air outlet hopper (202) communicating with the condensation chamber on both sides. The air inlet hopper (201) is fixedly connected to an air inlet pipe (9). Multiple air inlets (901) are provided along the length of the air inlet pipe (9). The air outlet hopper (202) is fixedly connected to an exhaust pipe (11). A fan (12) is fixedly connected to the exhaust pipe (11). Multiple air outlet nozzles (13) are rotatably connected along the length of the exhaust pipe (11). A swing assembly (14) is provided at the air outlet nozzle (13). The swing assembly (14) is used to drive the air outlet nozzle (13) to swing up and down. The outer sides of the cold side (301) and hot side (302) of the semiconductor heating and cooling sheet (3) are respectively wrapped with a first temperature-conducting surface (303) and a second temperature-conducting surface (304). Multiple condensation meshes (4) are fixedly connected at equal intervals on the outer wall of the first temperature-conducting surface (303) inside the condensing chamber. A partition assembly (7) is also provided inside the condensing chamber at the condensation meshes (4) to extend the path of air through the condensation meshes (4). The dehumidification chamber (2) has a heat dissipation plate (6) installed on the inner wall of the heat dissipation chamber. Multiple heat-conducting plates (5) are fixedly connected at equal intervals between the heat dissipation plate (6) and the second heat-conducting surface (304). A condensate conveying mechanism (8) is provided between the heat dissipation plate (6) and the condensation chamber.

2. The low-voltage cable distribution box with automatic drainage and dehumidification structure according to claim 1, characterized in that, Several heat dissipation fins (601) that pass through the dehumidification box (2) are fixedly connected to the outer wall of the heat dissipation plate (6).

3. The low-voltage cable distribution box with automatic drainage and dehumidification structure according to claim 1, characterized in that, The heat sink (6) is provided with a water supply channel (602) inside. The water supply channel (602) is a multi-segment U-shaped loop. The top of the water supply channel (602) is provided with a water inlet pipe (603) that penetrates the heat sink (6) and the dehumidification box (2). The bottom of the water supply channel (602) is provided with a drain pipe (604) that penetrates the heat sink (6) and the dehumidification box (2).

4. The low-voltage cable distribution box with automatic drainage and dehumidification structure according to claim 3, characterized in that, The dehumidification box (2) has a drain outlet (203) at the bottom of the condensation chamber, and a water collection cover (204) is fixedly connected to the outer wall of the dehumidification box (2) outside the drain outlet (203).

5. A low-voltage cable junction box with an automatic drainage and dehumidification structure according to claim 4, characterized in that, The bottom of the condenser chamber is provided with a water guiding slope, and the height of the water guiding slope gradually decreases along the first heat-conducting surface (303) toward the drain outlet (203).

6. A low-voltage cable junction box with an automatic drainage and dehumidification structure according to claim 4, characterized in that, The condensate conveying mechanism (8) includes a lift pipe (801) fixedly connected to the outer wall of the dehumidification box (2). A conveying auger (802) is rotatably connected inside the lift pipe (801). A motor (803) is installed at the bottom end of the lift pipe (801). The output end of the motor (803) is fixedly connected to one end of the conveying auger (802). A first conveying pipe (804) is fixedly connected between the water collection cover (204) and the bottom end of the lift pipe (801). A second conveying pipe (805) is fixedly connected between the water inlet pipe (603) and the top end of the lift pipe (801).

7. A low-voltage cable junction box with an automatic drainage and dehumidification structure according to claim 1, characterized in that, The partition assembly (7) includes multiple upper partitions (701) and lower partitions (702). An upper partition (701) or a lower partition (702) is provided between two adjacent condensation nets (4). The top of the upper partition (701) is fixedly connected to the top of the condensation chamber, and a gap is left between the bottom of the upper partition (701) and the bottom of the condensation chamber. The bottom of the lower partition (702) is fixedly connected to the bottom of the condensation chamber, and a gap is left between the top of the lower partition (702) and the top of the condensation chamber.

8. A low-voltage cable junction box with an automatic drainage and dehumidification structure according to claim 1, characterized in that, One end of the air inlet pipe (9) extends into the air inlet hopper (201) and is fixedly connected to a diverter connector (10).

9. A low-voltage cable junction box with an automatic drainage and dehumidification structure according to claim 1, characterized in that, The swing assembly (14) includes a guide sleeve (1401) fixedly connected to the bottom of the junction box (1). A movable plate (1402) is slidably connected inside the guide sleeve (1401). A linkage column (1301) is fixedly connected to each of the air outlet nozzles (13). A linkage groove (1403) is provided on the movable plate (1402) at the linkage column (1301). The linkage groove (1403) is a horizontally arranged waist-shaped groove. One end of the linkage column (1301) is placed in the linkage groove (1403).

10. A low-voltage cable junction box with an automatic drainage and dehumidification structure according to claim 8, characterized in that, The swing assembly (14) also includes a ventilation hood (1405) fixedly connected to the exhaust pipe (11). A rotating shaft (1406) is rotatably connected inside the ventilation hood (1405). A fan wheel (1407) is fixedly sleeved on the outside of the rotating shaft (1406) inside the ventilation hood (1405). One end of the rotating shaft (1406) extends to the outside of the ventilation hood (1405) and is fixedly connected to a turntable (1408). A guide post (1409) is fixedly connected to the edge of the turntable (1408) away from the rotating shaft (1406). A guide plate (1404) is fixedly connected to the top of the moving plate (1402). A guide groove (1410) is opened on the guide plate (1404) along the length direction. One end of the guide post (1409) is placed in the guide groove (1410).

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