Low-voltage cable branch box convenient for heat dissipation

Abstract

The invention relates to a low-voltage cable branch box convenient for heat dissipation, and belongs to the technical field of cable branch boxes, the low-voltage cable branch box comprises a box body, heat dissipation holes are formed in the box body, a sealing mechanism for sealing the heat dissipation holes is arranged on the box body, a water cooling mechanism is arranged on the box body, and a humidity sensor is arranged on the outer side of the box body; the control unit is configured to control opening and closing of the closing mechanism and start and stop of the water cooling mechanism according to a humidity signal detected by the humidity sensor; when the humidity exceeds a preset threshold value, the sealing mechanism seals the heat dissipation holes, and the water cooling mechanism is started; and when the humidity is within the preset range, the sealing mechanism opens the heat dissipation holes and the water cooling mechanism is closed. By arranging the humidity sensor and the control unit, automatic switching of the heat dissipation mode based on the environment humidity is achieved, and when the environment humidity is normal, the heat dissipation holes are opened for heat dissipation; and when the humidity exceeds a preset threshold value, a water cooling mode is adopted and the heat dissipation holes are closed, moisture invasion is blocked, the use safety of equipment is improved, and the service life of the equipment is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cable branch boxes, in particular to a low-voltage cable branch box facilitating heat dissipation. BACKGROUND

[0002] As a key infrastructure in the power system, cable branch boxes are widely used in the multi-branch connection of cables to improve the flexibility and efficiency of wiring. In outdoor environments, cable branch boxes need to effectively protect the internal connection devices from external factors that may cause malfunctions. However, with the increasing power load, especially during the summer peak electricity period, the heat generated inside the cable branch box rises sharply, posing higher requirements for heat dissipation performance. In the prior art, cable branch boxes mostly rely on heat dissipation holes for natural air cooling. Although this design is simple in structure, the number and size of the heat dissipation holes are often limited to ensure protection, resulting in insufficient heat dissipation efficiency and inability to timely dissipate heat, which may cause equipment overheating and aging, and even affect the stability of power transmission.

[0003] To solve the heat dissipation problem, some improved schemes install heat dissipation fans to enhance air circulation and improve heat exchange efficiency. However, this approach has obvious defects in rainy or high-humidity environments: although a water-blocking protrusion (such as a roof-like structure) is often installed outside the heat dissipation holes to prevent rainwater from directly entering, humid air can still enter the box through the pores. In the southern plum rain season, the air contains a high amount of moisture, which condenses into water droplets on the inner walls of the box, and the droplets falling onto electronic components may cause short circuits, corrosion, and other faults, posing a serious threat to equipment safety. In addition, relying solely on air cooling has limited effectiveness in extreme weather conditions, and cannot fundamentally balance the contradiction between heat dissipation and moisture prevention.

[0004] Another approach is to eliminate the heat dissipation holes and use a water-cooled heat dissipation system to reduce the temperature through external water circulation. Although this method can effectively control the temperature, it introduces new risks: the water-cooled pipeline may have condensation, seepage, or leakage risks, requiring frequent inspection and maintenance, and the components such as the circulating pump are prone to damage during long-term operation, increasing the cost and failure rate. At the same time, the water-cooled system relies on a continuous water source and power, which has poor applicability in remote areas and is difficult to achieve widespread application. SUMMARY

[0005] To ensure heat dissipation efficiency while reducing the risk of moisture intrusion and improving the reliability and service life of the equipment, the present application provides a low-voltage cable branch box facilitating heat dissipation.

[0006] The low-voltage cable branch box facilitating heat dissipation provided by the present application adopts the following technical solutions: The utility model provides a low -voltage cable branch box convenient to radiate heat, including the box, be equipped with the heat dissipation hole on the box, be equipped with the closing mechanism for closing heat dissipation hole on the box, be equipped with water cooling mechanism on the box, the outside of box is equipped with humidity transducer, The cable branch box further comprises a control unit configured to control the opening and closing of the closing mechanism and the start and stop of the water cooling mechanism according to the humidity signal detected by the humidity transducer; when the humidity exceeds a preset threshold, the closing mechanism closes the heat dissipation hole and the water cooling mechanism starts; when the humidity is within a preset range, the closing mechanism opens the heat dissipation hole and the water cooling mechanism stops.

[0007] Optionally, the box is provided with a sandwich layer, the water cooling mechanism comprises a water storage box arranged outside the box, a heat insulation recovery box, and a water cooling pipe arranged in the sandwich layer, one end of the water cooling pipe is in communication with the bottom of the water storage box, the other end is in communication with the top of one side of the heat insulation recovery box, the heat insulation recovery box is in communication with the water storage box through a recovery pipe, and a circulating pump is arranged on the recovery pipe.

[0008] Optionally, the upper end of the box is provided with a roof slope surface arranged obliquely downward, one side of the box is provided with a water guide groove, the water guide groove is configured to receive rainwater at the lower end of the roof slope surface, and the water guide groove is arranged obliquely and the obliquely lower end thereof is in communication with the water storage box.

[0009] Optionally, the heat insulation recovery box is provided with an overflow hole and a liquid level sensor, and the liquid level sensor is signal-connected with an alarm.

[0010] Optionally, the heat dissipation holes are arranged on both sides of the box, the box is provided with an air inlet fan and an air outlet fan, the air inlet fan is arranged at the heat dissipation hole on one side of the box, and the air outlet fan is arranged at the heat dissipation hole on the other side of the box.

[0011] Optionally, the heat dissipation holes on both sides of the box are arranged symmetrically, the closing mechanism comprises closing plates arranged at the heat dissipation holes on both sides of the box and a driving assembly for simultaneously driving the two closing plates to rotate, and each closing plate is rotatably connected to the outside of the box.

[0012] Optionally, the lower end of the box is provided with a base, the driving assembly comprises a rotating rod, a first synchronous wheel, a second synchronous wheel and a driving motor, the rotating rod is rotatably connected to the base, the two ends of the rotating rod are respectively connected to the two closing plates, the first synchronous wheel is coaxially fixed to the rotating rod, the driving motor is arranged on the base, the second synchronous wheel is coaxially fixed to the output end of the driving motor, and the first synchronous wheel and the second synchronous wheel are jointly sleeved with a synchronous belt.

[0013] Optionally, the same side of the two closing plates is integrally formed with a dust blocking frame, the included angle between each dust blocking frame and the corresponding closing plate is the same, and a dust blocking net is detachably fixed to the side of the dust blocking frame away from the box.

[0014] Optionally, the circulating pump, the air inlet fan, the air outlet fan and the driving motor are respectively connected with the control unit, when the humidity detected by the humidity sensor is within the preset range, the air inlet fan and the air outlet fan work simultaneously, and the driving motor drives the rotating rod to rotate, so that the dust screen covers the outside of the heat dissipation hole; when the humidity detected by the humidity sensor exceeds the preset threshold, the circulating pump is started, and the driving motor drives the rotating rod to rotate, so that the closing plate closes the heat dissipation hole.

[0015] Optionally, the water storage box is provided with a water inlet, the inclined lower end of the water guide groove and the water inlet are connected through a water guide channel, one end of the water guide channel is provided with a plug-in slot, and a grid plate is arranged in the plug-in slot.

[0016] In summary, the present application has at least one of the following beneficial technical effects: 1. The present application realizes automatic switching of the heat dissipation mode based on the environmental humidity by setting the humidity sensor and the control unit. When the environmental humidity is normal, the system preferentially adopts air cooling heat dissipation, and heat dissipation is achieved by opening the heat dissipation hole, avoiding unnecessary operation of the water cooling mechanism; when the humidity exceeds the preset threshold, the system automatically switches to the water cooling mode and closes the heat dissipation hole, effectively blocking the intrusion of moisture, so that the inside of the box can also be kept dry in a high-humidity environment, significantly improving the safety and reliability of the equipment operation, and prolonging the service life of the internal components. In addition, this design has significant advantages compared to using a water cooling system alone: it avoids the water cooling mechanism being in a working state all the time, thereby reducing the continuous wear and tear of vulnerable parts such as the circulating pump, and prolonging the overall service life of the equipment. The circulating pump in the water cooling mechanism is more prone to failure than the fan, and is more expensive. The intelligent switching mechanism not only reduces energy consumption, but also improves the reliability and maintenance convenience of the system, ensuring that the inside of the box remains dry and safe in complex environments.

[0017] 2. By setting the water storage box, the cold water pipe, the heat insulation recovery box, the recovery pipe and the circulating pump, the water cooling pipe is integrated in the interlayer of the box, optimizing the space utilization, making the structure compact, and playing a heat insulation role through the interlayer, reducing external environmental interference; secondly, the cooperation of the water storage box and the heat insulation recovery box realizes the recycling of cooling water, and the recovery pipe and the circulating pump ensure the continuous and stable flow of the cooling medium, improving the water cooling efficiency; in addition, when the circulating pump is not working, the stored water in the water cooling pipe will naturally flow back or evaporate, making the pipe wall gradually dry, avoiding the corrosion or scale accumulation problems that may be caused by long-term immersion of the water cooling pipe, thereby prolonging the service life of the pipeline. When water cooling is needed, the circulating pump pumps the water in the heat insulation recovery box to the water storage box, quickly restoring the water flow circulation, ensuring the heat dissipation response speed. This design not only improves the durability of the system, but also reduces the maintenance requirements through the dry-wet circulation mechanism.

[0018] 3. By setting overflow hole and liquid level sensor on the heat insulation recycling box, and combining with the alarm, the intelligent management of the water source of the water cooling mechanism is realized. The main function of the overflow hole is not only to prevent the overflow of the box, but more importantly, when the rainfall is large, the excess rainwater is allowed to flow out through the overflow hole, combined with the circulating pump, the stale water at the bottom of the heat insulation recycling box can be continuously pumped out, and the fresh rainwater can continuously flow into the heat insulation recycling box, thereby forming a "water replacement" effect, avoiding the deterioration of water quality or the breeding of microorganisms caused by the long-term retention of stale water in the heat insulation recycling box, so as to keep the water source clean. The liquid level sensor monitors the water level in real time, and when the water level is too low to affect the water cooling effect or the water level is abnormal, the alarm reminds the maintenance personnel to actively supplement water in time, avoiding the water cooling and heat dissipation failure caused by lack of water, and enhancing the active early warning ability and maintenance convenience of the system.

[0019] 4. By setting the dust blocking frame and the dust blocking net, when switching to the air cooling mode, the air entering the box can be effectively filtered, preventing dust, willow catkins and other sundries from entering the box through the heat dissipation hole, keeping the inside clean and reducing the poor heat dissipation or circuit failure caused by dust accumulation. The detachable design of the dust blocking net facilitates regular cleaning and maintenance, ensuring long-term protection effect. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a whole structure schematic diagram of a low-voltage cable branch box convenient for heat dissipation.

[0021] Figure 2 It is a structure schematic diagram in the process of rotating the closing plate.

[0022] Figure 3 It is a cutaway view of the internal structure of the box.

[0023] Figure 4 It is a structure schematic diagram of one perspective of the water cooling mechanism in the embodiment of the application, and the dashed line therein represents a signal connection relationship.

[0024] Figure 5 It is a structure schematic diagram of another perspective of the water cooling mechanism in the embodiment of the application.

[0025] Figure 6 It is a structure schematic diagram of the water guide channel in the embodiment of the application.

[0026] Figure 7 It is a structure schematic diagram of the dust blocking net covering the heat dissipation hole in the embodiment of the application.

[0027] Figure 8 It is a structure schematic diagram of the base in the embodiment of the application.

[0028] Figure 9is a structural schematic diagram of a driving assembly in the embodiment of the application.

[0029] Figure 10 is an exploded view of the connection relationship and position relationship of the closing plate, dust blocking frame and dust blocking net in the embodiment of the application.

[0030] Legend: 1, box body; 11, heat dissipation hole; 12, interlayer; 13, eave slope surface; 14, water guide groove; 15, air inlet fan; 16, air outlet fan; 2, closing mechanism; 21, closing plate; 22, driving assembly; 221, rotating rod; 222, first synchronous wheel; 223, second synchronous wheel; 224, driving motor; 225, synchronous belt; 23, dust blocking frame; 231, dust blocking net; 3, water cooling mechanism; 31, water storage box; 311, water inlet; 32, heat insulation and recovery box; 321, overflow hole; 322, liquid level sensor; 33, water cooling pipe; 34, recovery pipe; 341, one-way valve; 35, circulating pump; 36, water guide channel; 361, plug-in slot; 362, grid plate; 4, humidity sensor; 5, control unit; 6, alarm; 7, base. DETAILED DESCRIPTION

[0031] The application will be further described below in detail. Figures 1-10 The application will be further described below in detail.

[0032] Embodiment:

[0033] The embodiment of the application discloses a low-voltage cable branch box facilitating heat dissipation. Referring to Figures 1-3 A low-voltage cable branch box facilitating heat dissipation comprises a box body 1, a heat dissipation hole 11 is formed in the side wall of the box body 1, a closing mechanism 2 for closing the heat dissipation hole 11 is arranged on the box body 1, a water cooling mechanism 3 is arranged on the box body 1, and a humidity sensor 4 is fixedly installed on the top of the box body 1. A control unit 5 is fixed on the inner wall of the box body 1, and the control unit 5 is configured to control the opening and closing of the closing mechanism 2 and the start and stop of the water cooling mechanism 3 according to the humidity signal detected by the humidity sensor 4; when the humidity exceeds a preset threshold value, the closing mechanism 2 closes the heat dissipation hole 11 and the water cooling mechanism 3 is started; when the humidity is within a preset range, the closing mechanism 2 opens the heat dissipation hole 11 and the water cooling mechanism 3 is closed. In the embodiment, the control unit 5 is a controller.

[0034] The low-voltage cable branch box realizes automatic switching of the heat dissipation mode based on ambient humidity by setting the humidity sensor 4 and the control unit 5. When the ambient humidity is normal, the system preferentially adopts air cooling heat dissipation, and heat dissipation is performed through the opening of the heat dissipation hole 11, avoiding unnecessary operation of the water cooling mechanism 3; when the humidity exceeds the preset threshold, the system automatically switches to the water cooling mode and closes the heat dissipation hole 11, effectively blocking the intrusion of moisture, so that the inside of the box body 1 can also be kept dry in a high-humidity environment, significantly improving the safety and reliability of the equipment operation and prolonging the service life of the internal components. In addition, this design has significant advantages compared to using a water cooling system alone: it avoids the water cooling mechanism 3 being in a working state all the time, thereby reducing the continuous wear and tear of vulnerable parts such as the circulating pump 35, and prolonging the overall service life of the equipment. The circulating pump 35 in the water cooling mechanism 3 is more prone to failure than the fan, and is more expensive, so the intelligent switching mechanism not only reduces energy consumption, but also improves the reliability and maintenance convenience of the system, ensuring that the inside of the box body 1 remains dry and safe at all times in complex environments.

[0035] Referring to Figures 3-5 , the box body 1 is provided with a sandwich layer 12, and the water cooling mechanism 3 includes a water storage box 31 and a heat insulation recovery box 32 arranged outside the box body 1, and a water cooling pipe 33 arranged in the sandwich layer 12. One end of the water cooling pipe 33 is in communication with the bottom of the water storage box 31, and the other end is in communication with the top of one side of the heat insulation recovery box 32. The heat insulation recovery box 32 is in communication with the water storage box 31 through a recovery pipe 34, one end of the recovery pipe 34 is in communication with the bottom wall of one side of the heat insulation recovery box 32, and the other end of the recovery pipe 34 is in communication with the bottom wall of one side of the water storage box 31. The recovery pipe 34 is provided with a circulating pump 35, and one end of the recovery pipe 34 away from the heat insulation recovery box 32 is provided with a one-way valve 341.

[0036] The cable branch box integrates the water cooling pipe 33 in the sandwich layer 12 of the box body 1, optimizes the use of space, makes the structure compact, and plays a heat insulation role through the sandwich layer 12, reducing external environmental interference; secondly, the cooperation of the water storage box 31 and the heat insulation recovery box 32 realizes the recycling of cooling water, and the recovery pipe 34 and the circulating pump 35 ensure the continuous and stable flow of the cooling medium, improving the water cooling efficiency; in addition, when the circulating pump 35 is not working, the stored water in the water cooling pipe 33 will naturally flow back or evaporate, making the pipe wall gradually dry, avoiding the corrosion or scale accumulation problems that may be caused by long-term immersion of the water cooling pipe 33, thereby prolonging the service life of the pipeline. When water cooling needs to be enabled, the circulating pump 35 pumps the water in the heat insulation recovery box 32 to the water storage box 31, quickly restores the water flow circulation, and ensures the heat dissipation response speed. This design not only improves the durability of the system, but also reduces the maintenance requirements through the dry-wet circulation mechanism.

[0037] Referring to Figure 1 and Figure 5, the upper end of the box body 1 is provided with a sloping downward eave slope surface 13, one side of the box body 1 is provided with a water guide groove 14, the water guide groove 14 is configured to receive rainwater at the lower end of the eave slope surface 13, and the water guide groove 14 is inclined and the inclined lower end thereof is in communication with one side of the top of the water storage box 31. In this way, the eave slope surface 13 and the water guide groove 14 are used to realize natural collection and flow guidance of rainwater, the eave slope surface 13 guides rainwater to flow to the water guide groove 14, and the water is guided into the water storage box 31 through the inclined design thereof, thereby providing a sustainable water source supplement for the water cooling system. This not only reduces the dependence on external water supply, but also plays an environmental protection role of resource recycling; at the same time, the structure can effectively drain the accumulated water at the top of the box body 1 in heavy rain weather, reduce the risk of rainwater penetration, and enhance the protection performance of the box body 1.

[0038] Referring to Figure 5 and Figure 6 , the water storage box 31 is provided with a water inlet 311, the inclined lower end of the water guide groove 14 and the water inlet 311 are connected through a water guide channel 36, one end of the water guide channel 36 is provided with a plug-in slot 361 at the top, and the plug-in slot 361 is provided with a grid plate 362. The grid plate 362 has a filtering function and can intercept large-particle impurities such as leaves to prevent them from entering the water storage box 31 and causing blockage, thereby ensuring long-term stable operation of the water cooling mechanism 3 and being conducive to reducing the maintenance frequency.

[0039] Referring to Figure 4 , in order to realize intelligent management of the water source of the water cooling mechanism 3, the side wall of the heat insulation and recovery box 32 is provided with an overflow hole 321 and a liquid level sensor 322, the liquid level sensor 322 is preset with the lowest liquid level height in the heat insulation and recovery box 32 and is signal-connected with an alarm 6. The main function of the overflow hole 321 is not only to prevent the box body 1 from overflowing, but more importantly, when the rainfall is large, the excess rainwater is allowed to be discharged through the overflow hole 321, in combination with the circulating pump 35, the stale water at the bottom of the heat insulation and recovery box 32 can be continuously pumped out, and fresh rainwater can continuously flow into the heat insulation and recovery box 32, thereby forming a “water replacement” effect, avoiding long-term retention of stale water in the heat insulation and recovery box 32 to cause deterioration of water quality or breeding of microorganisms, and thereby maintaining the cleanliness of the water source. The liquid level sensor 322 monitors the water level in real time, and when the water level is too low to affect the water cooling effect or the water level is abnormal, the maintenance personnel are reminded in time through the alarm 6 to actively supplement water, thereby avoiding water cooling and heat dissipation failure caused by lack of water, and enhancing the active early warning capability and the convenience of maintenance of the system.

[0040] Referring to Figure 2 and Figure 3The heat dissipation holes 11 are arranged on both sides of the box body 1, the air suction fan 15 and the air exhaust fan 16 are arranged on the inner wall of the box body 1, the air suction fan 15 is arranged at the heat dissipation hole 11 on one side of the box body 1, and the air exhaust fan 16 is arranged at the heat dissipation hole 11 on the other side of the box body 1. In this way, forced convection circulation can be formed in the air cooling mode. The air suction fan 15 sucks in cold air from one side, and the air exhaust fan 16 exhausts hot air from the other side, so as to accelerate the heat dissipation in the box body 1, ensure efficient heat dissipation, and be especially suitable for high-load operation scenes in high-temperature environments.

[0041] With reference to Figure 1 , Figure 2 and Figure 7 , the heat dissipation holes 11 on both sides of the box body 1 are symmetrically arranged, the sealing mechanism 2 includes sealing plates 21 arranged corresponding to the heat dissipation holes 11 on both sides of the box body 1 and a driving assembly 22 for simultaneously driving the rotation of the two sealing plates 21, and each sealing plate 21 is rotationally connected to the outer side of the box body 1.

[0042] With reference to Figures 7-9 , the lower end of the box body 1 is fixedly connected with a base 7, the driving assembly 22 includes a rotating rod 221, a first synchronous wheel 222, a second synchronous wheel 223 and a driving motor 224, the rotating rod 221 is rotationally connected to the base 7, both ends of the rotating rod 221 are connected with the two sealing plates 21 respectively, the first synchronous wheel 222 is coaxially fixed on the rotating rod 221, the driving motor 224 is fixed on the base 7, the second synchronous wheel 223 is coaxially fixed with the output end of the driving motor 224, and the first synchronous wheel 222 and the second synchronous wheel 223 are jointly sleeved with a synchronous belt 225.

[0043] When the sealing mechanism 2 is used to open and close the heat dissipation holes 11, the driving motor 224 drives the rotation of the second synchronous wheel 223, the second synchronous wheel 223 drives the movement of the synchronous belt 225, and then drives the rotation of the first synchronous wheel 222, the first synchronous wheel 222 drives the rotation of the rotating rod 221, and then drives the rotation of the two sealing plates 21, so as to ensure the consistency of the opening and closing actions of the two sealing plates 21 and facilitate the timely closing or opening of the heat dissipation holes 11.

[0044] With reference to Figure 8 and Figure 10The same side of the two closing plates 21 is integrally formed with a dust-proof frame 23, and the included angle between each dust-proof frame 23 and the corresponding closing plate 21 is the same. The side of the dust-proof frame 23 away from the cabinet 1 is detachably fixed with a dust-proof screen 231. In this embodiment, the included angle between each dust-proof frame 23 and the corresponding closing plate 21 is 90°; the dust-proof screen 231 is fixed on the corresponding closing plate 21 by magnetic adsorption or magic tape. Through the setting of the dust-proof frame 23 and the dust-proof screen 231, when switched to the air cooling mode, the air entering the cabinet 1 can be effectively filtered, preventing dust, willow catkins and other sundries from entering the cabinet through the heat dissipation holes 11, keeping the inside clean and reducing poor heat dissipation or circuit failure caused by dust accumulation. The detachable design of the dust-proof screen 231 facilitates regular cleaning and maintenance, ensuring long-term protection effect.

[0045] With reference to Figure 1 , Figure 2 , Figure 7 and Figure 8 , the circulating pump 35, the air suction fan 15, the air exhaust fan 16 and the driving motor 224 are signal connected with the control unit 5. When the humidity detected by the humidity sensor 4 is within the preset range, the air suction fan 15 and the air exhaust fan 16 work at the same time, and the driving motor 224 drives the rotating rod 221 to rotate, so that the dust-proof screen 231 covers the outside of the heat dissipation hole 11; when the humidity detected by the humidity sensor 4 exceeds the preset threshold, the circulating pump 35 starts, and the driving motor 224 drives the rotating rod 221 to rotate, so that the closing plate 21 closes the heat dissipation hole 11.

[0046] When the humidity sensor 4 detects that the environmental humidity is within the preset range (i.e. normal humidity condition), the air cooling mode is started. At this time, the air suction fan 15 and the air exhaust fan 16 work at the same time: the air suction fan 15 is located at the heat dissipation hole 11 on one side of the cabinet 1, responsible for sucking the external cold air into the cabinet; the air exhaust fan 16 is located at the heat dissipation hole 11 on the other side of the cabinet 1, responsible for exhausting the internal hot air out of the cabinet, thereby forming forced convection in the cabinet 1, accelerating heat dissipation. At the same time, the driving motor 224 is started to drive the rotating rod 221 to rotate, and through the synchronous belt 225 and the synchronous wheel transmission, the closing plate 21 is in the open position, and the dust-proof screen 231 covers the outside of the heat dissipation hole 11. The function of the dust-proof screen 231 is to filter the dust and sundries in the air, prevent pollutants from entering the cabinet 1, and at the same time allow the air to flow freely. The circulating pump 35 is in the closed state in this mode, and the water cooling mechanism 3 does not work. In the air cooling mode, the heat dissipation hole 11 remains open, and the inside of the cabinet 1 relies on air flow to achieve efficient heat dissipation.

[0047] When the humidity sensor 4 detects that the humidity exceeds the preset threshold (such as rainy days or high humidity environment), it automatically switches to the water cooling mode. At this time, the circulating pump 35 starts to pump the water in the heat insulation recovery tank 32 to the water storage box 31, and circulates in the interlayer 12 of the box body 1 through the water cooling pipe 33, taking away the internal heat. At the same time, the air inlet fan 15 and the exhaust fan 16 stop working, the driving motor 224 drives the rotating rod 221 to rotate, and the closing plate 21 rotates to the position of closing the heat dissipation hole 11, completely blocking the invasion of external humid air. The dust screen 231 is removed from the outside of the heat dissipation hole 11 with the closing plate 21 in this mode, and no longer plays a leading role. In the water cooling mode, the heat dissipation hole 11 is completely closed, and the internal heat dissipation of the box body 1 relies on the water cooling mechanism 3, and the water in the water cooling pipe 33 will naturally return to the heat insulation recovery tank 32 or evaporate when the circulating pump 35 does not work, keeping the pipe wall dry, avoiding corrosion caused by long-term immersion.

[0048] The cable branch box realizes automatic switching of the heat dissipation mode according to the environmental humidity, and in normal humidity, it preferentially adopts air cooling, which can meet the heat dissipation demand only by working of the air inlet fan and the exhaust fan, and has low energy consumption; and in high humidity environment, it switches to water cooling, avoiding the introduction of moisture by air cooling, and improving the heat dissipation pertinence. Secondly, the mechanism significantly prolongs the service life of the equipment: the circulating pump 35 in the water cooling mechanism 3 is a vulnerable part, which is started only when necessary, reducing the wear caused by continuous operation, and the dry-wet cycle design of the water cooling pipe 33 avoids long-term immersion corrosion. In addition, the switching process has high automation degree, the position changes of the closing plate 21 and the dust screen 231 are uniformly controlled by the driving motor 224, ensuring the synchronicity and reliability of the action, and reducing the demand for manual intervention. Finally, this intelligent switching not only guarantees the dryness and safety of the internal box 1 in complex environment, but also reduces the maintenance cost, improves the overall operation efficiency and adaptability of the cable branch box.

[0049] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A low-voltage cable branch box facilitating heat dissipation, comprising a box body (1) provided with heat dissipation holes (11), characterized in that: The box (1) is provided with a closing mechanism (2) for closing the heat dissipation hole (11), the box (1) is provided with a water cooling mechanism (3), and the outer side of the box (1) is provided with a humidity sensor (4); Further comprising a control unit (5), the control unit (5) is configured to control the opening and closing of the closing mechanism (2) and the start and stop of the water cooling mechanism (3) according to the humidity signal detected by the humidity sensor (4); when the humidity exceeds the preset threshold, the closing mechanism (2) closes the heat dissipation hole (11) and the water cooling mechanism (3) is started; when the humidity is within the preset range, the closing mechanism (2) opens the heat dissipation hole (11) and the water cooling mechanism (3) is closed.

2. The low-voltage cable junction box of claim 1, wherein: The box (1) is provided with a sandwich (12), the water cooling mechanism (3) includes a water storage box (31) and a heat insulation recovery box (32) arranged outside the box (1), and a water cooling pipe (33) arranged in the sandwich (12), one end of the water cooling pipe (33) is communicated with the bottom of the water storage box (31), the other end is communicated with the top of one side of the heat insulation recovery box (32), the heat insulation recovery box (32) is communicated with the water storage box (31) through a recovery pipe (34), and the recovery pipe (34) is provided with a circulating pump (35).

3. The low-voltage cable junction box of claim 2, wherein: The upper end of the box (1) is provided with a sloping eave slope (13), one side of the box (1) is provided with a water guide groove (14), the water guide groove (14) is configured to receive the rainwater at the lower end of the eave slope (13), and the water guide groove (14) is inclined and its inclined lower end is communicated with the water storage box (31).

4. The low-voltage cable junction box of claim 3, wherein: The heat insulation recovery box (32) is provided with an overflow hole (321) and a liquid level sensor (322), and the liquid level sensor (322) is signal connected with an alarm (6).

5. The low-voltage cable junction box of claim 2, wherein: The heat dissipation hole (11) is arranged on both sides of the box (1), the box (1) is provided with an air guide fan (15) and an exhaust fan (16), the air guide fan (15) is arranged at the heat dissipation hole (11) on one side of the box (1), and the exhaust fan (16) is arranged at the heat dissipation hole (11) on the other side of the box (1).

6. A low voltage cable terminal chamber facilitating heat dissipation as claimed in claim 5 wherein: The heat dissipation holes (11) on both sides of the box (1) are symmetrically arranged, the closing mechanism (2) includes a closing plate (21) arranged corresponding to the heat dissipation holes (11) on both sides of the box (1) and a driving assembly (22) for simultaneously driving the two closing plates (21) to rotate, and each closing plate (21) is rotatably connected to the outer side of the box (1).

7. A low voltage cable terminal chamber facilitating heat dissipation as claimed in claim 6 wherein: The lower end of the box (1) is provided with a base (7), the driving assembly (22) comprises a rotating rod (221), a first synchronous wheel (222), a second synchronous wheel (223) and a driving motor (224), the rotating rod (221) is rotatably connected to the base (7), the two ends of the rotating rod (221) are connected with two sealing plates (21) respectively, the first synchronous wheel (222) is coaxially fixed on the rotating rod (221), the driving motor (224) is arranged on the base (7), the second synchronous wheel (223) is coaxially fixed with the output end of the driving motor (224), and the first synchronous wheel (222) and the second synchronous wheel (223) are coaxially fixed with the output end of the driving motor (224).

8. A low voltage cable terminal chamber facilitating heat dissipation as claimed in claim 7 wherein: The same side of the two sealing plates (21) is integrally formed with a dust blocking frame (23), the included angle between each dust blocking frame (23) and the corresponding sealing plate (21) is the same, and the side, away from the box (1), of the dust blocking frame (23) is detachably fixed with a dust blocking net (231).

9. A low voltage cable terminal chamber facilitating heat dissipation as claimed in claim 8 wherein: The circulating pump (35), the air suction fan (15), the air exhaust fan (16) and the driving motor (224) are signal connected with the control unit (5), when the humidity detected by the humidity sensor (4) is in the preset range, the air suction fan (15) and the air exhaust fan (16) work at the same time, and the driving motor (224) drives the rotating rod (221) to rotate, so that the dust blocking net (231) covers the outside of the heat dissipation hole (11); when the humidity detected by the humidity sensor (4) exceeds the preset threshold value, the circulating pump (35) is started, and the driving motor (224) drives the rotating rod (221) to rotate, so that the sealing plate (21) seals the heat dissipation hole (11).

10. The low-voltage cable junction box of claim 3, wherein: The water storage box (31) is provided with a water inlet (311), the inclined lower end of the water guide groove (14) and the water inlet (311) are connected through a water guide channel (36), one end of the water guide channel (36) is provided with a plug-in groove (361), and the plug-in groove (361) is provided with a grid plate (362).

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