Moisture-proof ventilated distribution box

Abstract

This invention relates to the field of distribution boxes and discloses a moisture-proof and ventilated distribution box, comprising a box body, an axial flow fan duct, a first air drive assembly, a second air drive assembly, and a cooling assembly. The axial flow fan duct has an air inlet chamber and a flow-promoting chamber arranged sequentially along its axial direction. The first air drive assembly draws air from outside the box into the air inlet chamber and directs the airflow to the inner wall of the air inlet chamber. Guided by the inner wall, the airflow enters the flow-promoting chamber. The second air drive assembly drives the airflow axially, allowing the airflow from the air inlet chamber to enter the flow-promoting chamber and then flow into the box body. The cooling assembly cools the sidewall of the axial flow fan duct, causing water vapor in the airflow passing through the inner wall of the air inlet chamber to condense and precipitate on its surface. This invention, while ensuring air circulation inside the box, prevents external humid air and rainwater from intruding into the box at the source, achieving both efficient ventilation and heat dissipation and reliable moisture protection, thus improving the overall safety and reliability of the equipment.

Description

Technical Field

[0001] This invention relates to the field of distribution box technology, and specifically to a moisture-proof and ventilated distribution box. Background Technology

[0002] Distribution boxes are core power distribution equipment in power systems, widely used in various scenarios such as industry, construction, and outdoor environments. They mainly undertake power distribution, control, protection, and monitoring functions, and are a key hub to ensure the safe and reliable power supply of the power system. With the increasing integration of electrical equipment, the components inside the box will continuously generate heat during operation, and timely heat dissipation through ventilation is necessary to avoid safety accidents such as component aging and short circuits. At the same time, outdoor, coastal, and rainy season scenarios have high humidity, and humid air can easily cause component corrosion and a decline in insulation performance. Moisture protection is also a key aspect of distribution box design, especially in rainy and humid areas, where moisture protection performance directly affects the reliability and service life of the equipment.

[0003] Existing distribution boxes are difficult to effectively balance the dual requirements of moisture protection and ventilation in their design. Specifically, to achieve ventilation and heat dissipation, existing distribution boxes usually have ventilation holes on the side walls, top, or bottom of the box to expel heat through air convection. However, these ventilation holes also become the main channels for humid air, rainwater, and dust to enter the box, easily causing various moisture-related malfunctions. On the other hand, if a fully sealed design is adopted to block the ventilation channels to improve moisture protection, although it can block the intrusion of humid air to a certain extent, it will completely sacrifice the ventilation and heat dissipation function, resulting in heat accumulation and continuous temperature rise inside the box, which will damage electrical components and cause safety hazards. Ultimately, it is impossible to meet the usage requirements of ventilation and moisture protection at the same time.

[0004] In summary, the design of existing distribution boxes cannot effectively balance the dual requirements of ventilation and heat dissipation with moisture protection. This contradiction is particularly prominent in rainy and humid areas, resulting in low reliability, frequent failures, and short service life of the distribution boxes, which cannot meet the requirements for safe and stable operation of power systems in various scenarios. Summary of the Invention

[0005] Therefore, the present invention provides a moisture-proof and ventilated distribution box, which solves the technical problem that the design of existing distribution boxes cannot effectively meet the dual requirements of ventilation and heat dissipation and moisture protection.

[0006] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: a moisture-proof and ventilated distribution box, comprising: The housing has air vents at the bottom for airflow to enter and exit. An axial flow fan duct is installed on the side wall of the housing. The axial flow fan duct is open at both ends, with one end facing the outside of the housing and the other end facing the inside of the housing. An air inlet chamber and a flow-promoting chamber are arranged sequentially along the axial direction inside the axial flow fan duct. A first air-driven assembly is installed inside the air inlet cavity. The first air-driven assembly brings the gas outside the box into the air inlet cavity and causes the airflow to flow to the inner wall of the air inlet cavity. Under the guidance of the inner wall of the air inlet cavity, the airflow enters the flow-promoting cavity. The second air drive component is installed in the flow-promoting cavity. The second air drive component drives the airflow to flow axially so that the airflow in the air inlet cavity enters the flow-promoting cavity and then flows into the interior of the housing. A cooling assembly is installed on the outer wall of the axial flow fan corresponding to the air inlet cavity. The cooling assembly cools the side wall of the axial flow fan, causing water vapor in the airflow passing through the inner side wall of the air inlet cavity to condense and precipitate on the surface of the inner side wall of the air inlet cavity.

[0007] Furthermore, the outer wall of the housing is provided with mounting holes, and the axial flow fan is installed in the mounting holes; The axial flow duct includes a first section, a second section, and a third section arranged sequentially. The air inlet cavity is formed inside the first cylindrical section, the flow-promoting cavity is formed inside the second cylindrical section, the first cylindrical section and the second cylindrical section are connected, and an inner ring plate is installed at the connection point. The inner ring plate is installed inside the first cylindrical section and the second cylindrical section. An inner circular plate is fixedly provided on the inner edge of the inner ring plate. An air passage is provided inside the first cylinder section. The outer edge of the air passage is bent outward and installed and connected to the outer edge of the first cylinder section, and the inner edge is connected to the junction of the inner ring plate and the inner circular plate. The upper half of the air passage cylinder has several first air passage holes on its side wall, and the inner ring plate has a second air passage hole. The airflow in the first cylinder section can enter the interior of the second cylinder section through the first air passage holes and the second air passage holes.

[0008] Furthermore, an installation arc plate is provided between the inner wall of the first cylinder section and the outer wall of the air passage, and the installation arc plate is installed in the upper part of the first cylinder section; The mounting arc plate is provided with several third air passages.

[0009] Furthermore, perforations are provided at the connection between the outer edge of the air duct and the outer edge of the first cylinder section, and the perforations are located at the bottom of the first cylinder section; A sealing plug is inserted through the perforation, and a water leakage hole is provided on the sealing plug. A tension buckle is provided at one end of the sealing plug facing the outside of the first cylinder section, and a limit buckle is provided at the other end facing the inside of the first cylinder section. A spring is provided on the outer sleeve of the sealing plug. The spring is located inside the first cylinder section, with one end pressing against the outer edge of the air passage and the other end pressing against the limit buckle.

[0010] Furthermore, the first wind drive assembly includes a drive shaft disposed inside the axial flow duct, a first mounting base mounted outside the drive shaft, and a plurality of radial guide vanes mounted outside the first mounting base; The drive shaft passes through the inner circular plate, and a rotating bearing is installed at the penetration point. The drive shaft is mounted on the rotating bearing, and the radial guide vanes are arranged along the axial direction of the axial flow fan. As the radial guide vanes rotate following the drive shaft, they drive the airflow to flow radially along the axial flow duct.

[0011] Furthermore, the second wind drive assembly includes a second mounting base mounted outside the drive shaft and a plurality of axial guide vanes mounted outside the second mounting base; As the axial guide vanes rotate following the drive shaft, the axial guide vanes drive the airflow to flow axially along the axial flow duct.

[0012] Furthermore, the cooling assembly includes a flow pipe disposed outside the first cylindrical section, an inlet pipe connected to one end of the flow pipe, and an outlet pipe connected to the other end of the flow pipe. The flow tube is spirally wound around the outside of the first cylindrical section. An annular chamber is installed between the second and third cylindrical sections. A rotating plate is provided inside the annular chamber. An annular groove is provided on the inner circumference of the annular chamber for the rotating plate to pass through. The rotating plate is coaxially fixed with the drive shaft. Pushing plates are installed in a circular array on both sides of the rotating plate. The pushing plates are located inside the annular chamber. The annular chamber has an outlet and an inlet on different sides of its outer periphery. The end of the inlet pipe is connected to the outlet, and the end of the outlet pipe is connected to the inlet.

[0013] Furthermore, a heat dissipation cavity is provided on the top of the box, the liquid outlet pipe passes through the box and through the heat dissipation cavity, a number of heat dissipation fins are provided in the heat dissipation cavity, and the liquid outlet pipe passes through and connects to the heat dissipation fins; A fan is installed on the top of the heat dissipation cavity, directly opposite the heat dissipation fins, and a dust cover is provided on the top of the housing, directly opposite the heat dissipation cavity.

[0014] Furthermore, an L-shaped partition is provided inside the box, the bottom of which is away from the bottom of the box, dividing the interior of the box into a first inner cavity and a second inner cavity arranged in front and behind, and the axial flow fan is arranged in the second inner cavity; The air vent is directly opposite the bottom of the L-shaped partition plate; The upright portion of the L-shaped partition plate has several through holes, and the first inner cavity communicates with the second inner cavity through the through holes.

[0015] Furthermore, a bottom baffle is installed at the bottom of the air passage, and a plurality of first air holes are opened on the bottom baffle; A top baffle is installed at the top of the air passage, a connecting cylinder is installed at the bottom of the top baffle, a connecting plate is connected to the bottom of the connecting cylinder, the connecting plate is placed inside the air passage, and the outer edge of the connecting plate is tightly fitted to the inner wall of the air passage; The connecting plate has a second air hole at its center, the connecting cylinder has several third air holes on its side wall, and the top baffle has a fourth air hole at a position away from the connecting cylinder. The gas inside the box can be discharged outside the box in sequence through the fourth air hole, the third air hole, the second air hole, and the first air hole.

[0016] Compared with the prior art, the present invention has the following advantages: This invention, while ensuring air circulation inside the enclosure, prevents external humid air and rainwater from entering the enclosure at the source, achieving both efficient ventilation and heat dissipation and reliable moisture protection, thus improving the overall safety and reliability of the equipment. By dividing the air inlet chamber and the flow-promoting chamber inside the axial flow fan, and with the orderly driving of the first and second air drive components, the external airflow is condensed and dehumidified before entering the box, separating and removing water vapor in the airflow in advance. This prevents humid air and rainwater from directly entering the box through the ventilation channel, avoiding safety hazards caused by moisture such as corrosion of components, reduced insulation performance, short circuits, and leakage. It also improves the moisture-proof reliability of the structure in high humidity, rainy, and coastal scenarios. After being dehumidified, the dry airflow enters the cabinet in an orderly manner under the guidance of the inner wall of the air inlet cavity and the continuous drive of the second air drive component, forming a stable convection. This can promptly remove the heat generated by the operation of the electrical components inside the cabinet, avoiding problems such as heat accumulation leading to temperature rise and accelerated component aging. Under the action of the first air drive component, the airflow flows radially in the air inlet cavity, improving the water vapor condensation and separation effect, and ensuring that the airflow entering the chamber has sufficient dryness; at the same time, the airflow path is reasonably guided and driven by multiple stages, resulting in high ventilation efficiency and stable and uniform airflow, which can continuously and efficiently dissipate heat and cool down the key components in the chamber, improving the overall effect of dehumidification and heat dissipation. Attached Figure Description

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a moisture-proof and ventilated distribution box provided in an embodiment of the present invention; Figure 2 This is a perspective sectional view of the box body in an embodiment of the present invention; Figure 3 for Figure 2 A schematic diagram of the side view structure; Figure 4 for Figure 2 A top-view structural diagram; Figure 5 for Figure 4 A three-dimensional sectional view along the AA direction; Figure 6 for Figure 4 A three-dimensional sectional view along the BB direction; Figure 7 This is a schematic diagram of the axial flow fan in an embodiment of the present invention; Figure 8 This is a schematic diagram of the axial flow fan from another perspective in an embodiment of the present invention; Figure 9 for Figure 8 A top-view structural diagram; Figure 10 for Figure 9 A three-dimensional sectional view along the CC direction; Figure 11 for Figure 6 A magnified structural diagram of A in the middle; Figure 12 for Figure 10 A magnified structural diagram of B in the diagram.

[0019] The labels in the diagram represent the following: 1. Housing; 2. Air vent; 3. Axial flow fan duct; 4. First air drive assembly; 5. Second air drive assembly; 6. Cooling assembly; 7. Air inlet cavity; 8. Flow-promoting cavity; 9. Mounting hole; 10. Perforation; 11. Sealing bolt; 12. Drain hole; 13. Pull buckle; 14. Limit buckle; 15. L-shaped partition plate; 16. First inner cavity; 17. Second inner cavity; 18. Through hole; 19. Bottom baffle; 20. First air vent; 21. Top baffle; 22. Connecting cylinder; 23. Connecting plate; 24. Second air vent; 25. Third air vent; 26. Fourth air vent; 31. First cylindrical section; 32. Second cylindrical section; 33. Third cylindrical section; 34. Inner ring plate; 35. Inner circular plate; 36. Air passage; 37. First air passage hole; 38. Second air passage hole; 39. Mounting arc plate; 310. Third air passage hole; 41. Drive shaft; 42. First mounting base; 43. Radial guide vane; 44. Rotary bearing; 51. Second mounting base; 52. Axial guide vane; 61. Flow pipe; 62. Inlet pipe; 63. Outlet pipe; 64. Annular chamber; 65. Rotating plate; 66. Flow plate; 67. Outlet; 68. Inlet; 69. Heat dissipation cavity; 610. Heat dissipation fins; 611. Dust cover. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1-5 , Figure 7 As shown, the present invention provides a moisture-proof and ventilated distribution box, which mainly includes a box body 1, an axial flow fan duct 3, a first air drive component 4, a second air drive component 5, and a cooling component 6. The axial flow fan duct 3, the first air drive component 4, and the second air drive component 5 work together to continuously introduce air from outside the box body 1 into the box body 1, achieving efficient ventilation between the inside and outside of the box body 1, ensuring air circulation inside the box body 1, and thus effectively reducing the heat accumulation generated by electrical components during operation, avoiding performance degradation and shortened service life of electrical components due to high temperature environment.

[0022] The bottom of the housing 1 is provided with an air passage 2 for airflow to enter and exit, which not only ensures smooth airflow, but also prevents external debris and dust from entering the housing 1 through the air passage 2, so as to avoid them adhering to the surface of electrical components and affecting their normal operation. When external gas continuously enters the chamber 1 through the axial flow fan duct 3, the original gas inside the chamber 1 is compressed and will be smoothly discharged from the chamber 1 through the air passage 2, forming a complete airflow cycle to ensure stable ventilation. At the same time, the heat generated by the electrical components inside the chamber 1 and a small amount of residual moisture can be discharged together, further improving the stability of the internal environment of the chamber 1.

[0023] The axial flow duct 3 is installed on the side wall of the housing 1. Both ends of the duct are open. One end faces the outside of the housing 1 to introduce outside gas, and the other end faces the inside of the housing 1 to transport the treated dry gas. The overall structure of the axial flow duct 3 is sealed to the side wall of the housing 1 to prevent untreated humid gas from the outside from seeping into the inside of the housing 1 through the connection gap. The axial flow duct 3 is divided into two independent chambers along its axial direction: an air inlet chamber 7 and a flow-promoting chamber 8. The two chambers have clear division of labor and work together: the air inlet chamber 7 is mainly used to introduce airflow and condense humid airflow, and to perform preliminary dehumidification of the airflow; the flow-promoting chamber 8 is mainly used to promote the airflow to flow in a directional manner into the housing 1, to ensure the smoothness of airflow delivery, to avoid the airflow from stagnating inside the axial flow duct 3, and to ensure that the ventilation efficiency is not affected.

[0024] The first air drive assembly 4 is installed inside the air inlet cavity 7. Its core function is to draw gas from outside the housing 1 into the air inlet cavity 7 and push the airflow towards the inner wall of the air inlet cavity 7. Under the guidance of the inner wall of the air inlet cavity 7, the airflow smoothly enters the flow-promoting cavity 8. By pushing the airflow radially along the axial flow fan duct 3 to the inner wall of the air inlet cavity 7, the airflow can fully contact the inner wall, increasing the contact area and contact time between the airflow and the cooled inner wall. This provides favorable conditions for subsequent condensation and dehumidification, improves dehumidification efficiency, and ensures that most of the water vapor in the airflow can be condensed and precipitated in the air inlet cavity 7, reducing the probability of untreated humid airflow entering the housing 1.

[0025] The second air drive component 5 is installed inside the flow-promoting cavity 8. Its main function is to drive the airflow to flow along the axial direction of the axial flow duct 3, forming a stable axial airflow force. This allows the dry airflow, after being condensed by the air inlet cavity 7, to enter the flow-promoting cavity 8 and be smoothly and quickly delivered to every corner inside the housing 1. This enables the continuous intake of external dry gas, ensuring the ventilation requirements inside the housing 1 and allowing the dry airflow to fully envelop the electrical components inside the housing 1, carrying away the heat generated by the components. At the same time, it inhibits the accumulation of moisture inside the housing 1, providing a stable working environment for the electrical components.

[0026] The cooling component 6 is installed on the outer wall of the axial flow fan 3 at the position corresponding to the air inlet cavity 7, and is tightly fitted to the side wall of the axial flow fan 3 to ensure that the cooling effect can be quickly transferred to the inner side wall of the air inlet cavity 7. Its function is to uniformly cool the side wall of the axial flow fan 3 and keep the inner side wall of the air inlet cavity 7 at a stable low temperature. When the airflow passes through the inner wall of the air inlet cavity 7, the water vapor contained in the airflow will condense and precipitate on the surface of the inner wall of the air inlet cavity 7 due to the low temperature of the side wall. This condensation will adhere to the side wall, effectively preventing water vapor from entering the interior of the enclosure 1 and avoiding damage to the electrical structure inside the enclosure 1. Specifically, this includes preventing oxidation and corrosion of the pins of electrical components, preventing short circuits caused by moisture aging of the circuit insulation layer, and preventing mold and adhesion of contacts of components such as contactors and relays. This achieves reliable moisture protection and ensures long-term stable operation of the distribution box.

[0027] This invention divides the interior of the axial flow fan duct 3 into an air inlet chamber 7 and a flow-promoting chamber 8, so that the airflow gradually enters the interior of the housing 1 under the orderly drive of the first air drive component 4 and the second air drive component 5. At the same time, water vapor is condensed and removed during the airflow transportation process, thus avoiding the direct entry of humid airflow into the interior of the housing 1, which could cause electrical components to become malfunctioning due to moisture, leading to short circuits, leakage and other safety hazards.

[0028] Under the action of the first air drive component 4, the airflow can directly act on the inner wall of the air inlet cavity 7 in a radial flow state, which greatly increases the contact area and contact time between the airflow and the inner wall, enhances the condensation and removal effect of water vapor, and ensures that the airflow has reached a certain degree of dryness when it enters the flow-promoting cavity 8. Subsequently, the dry airflow after dehumidification treatment enters the flow-promoting cavity 8 under the guidance of the inner wall of the air inlet cavity 7, and continues to be transported into the box 1 under the drive of the second air drive component 5. This not only ensures ventilation efficiency and can remove the heat generated by the operation of electrical components in a timely manner to avoid high temperature damage to components, but also achieves a reliable moisture-proof effect, effectively extending the service life of the distribution box and its internal electrical components, reducing maintenance costs, and improving the stability and safety of the distribution box operation.

[0029] To further ensure the stable operation of the air intake and condensation functions of the axial flow fan duct 3, such as... Figure 6 As shown, an installation hole 9 is provided on the outer wall of the enclosure 1 corresponding to the installation position of the axial flow fan 3. The axial flow fan 3 is tightly embedded in the installation hole 9 and is sealed and fitted with the inner wall of the installation hole 9, which effectively prevents external humid gas, dust and other substances from seeping into the interior of the enclosure 1 from the installation gap, thereby improving the sealing and moisture-proof performance of the distribution box.

[0030] The specific structure of the axial flow fan duct 3 is as follows: like Figures 7-10 As shown, the axial flow duct 3 is composed of a first section 31, a second section 32, and a third section 33 connected coaxially in sequence. The first section 31 and the second section 32 are connected. The air inlet chamber 7 is formed inside the first section 31 and is specifically used to receive external airflow and complete condensation and dehumidification. The flow-promoting chamber 8 is formed inside the second section 32 and is used to receive the dry airflow after it has been treated by the air inlet chamber 7 and push it into the housing 1. An inner ring plate 34 is fixedly installed inside the connection between the first section 31 and the second section 32. The inner ring plate 34 is installed inside the first section 31 and the second section 32 and serves the dual purpose of separating the air inlet chamber 7 and the flow-promoting chamber 8 and fixing the duct structure (first section 31 and second section 32).

[0031] like Figure 10As shown, an inner circular plate 35 is integrally fixed to the inner edge of the inner ring plate 34. An air passage 36 is also provided inside the first cylindrical section 31. The outer edge of the air passage 36 is bent outward to form an installation edge, which is fixedly connected to the outer edge of the first cylindrical section 31 by fasteners (fasteners are generally bolts), so as to realize the stable installation of the air passage 36 in the first cylindrical section 31. The inner edge of the air passage 36 is tightly connected to the junction of the inner ring plate 34 and the inner circular plate 35 to ensure that the airflow will not leak from the connection.

[0032] To achieve orderly airflow between the intake chamber and the flow-promoting chamber 8, such as Figure 10 As shown, the upper half of the air passage 36 has a plurality of first air passage holes 37 evenly opened on its side wall, and the inner ring plate 34 has corresponding second air passage holes 38 that match the first air passage holes 37. The first air passage holes 37 and the second air passage holes 38 are interconnected to form a channel for airflow to enter the second cylinder section 32 from the first cylinder section 31.

[0033] The specific airflow direction is as follows: the external airflow that has entered the air inlet cavity 7 (inside the first cylindrical section 31) flows radially outward under the radial driving force of the first air drive component 4 and passes through the first air passage hole 37 on the air passage cylinder 36. Then it flows to the inner wall of the air inlet cavity 7 (inner wall of the first cylindrical section 31). Under the guiding effect of the inner wall, the airflow turns and passes through the second air passage hole 38 on the inner ring plate 34, and smoothly enters the flow-promoting cavity 8 inside the second cylindrical section 32, completing the transition of the airflow from the air inlet cavity 7 to the flow-promoting cavity 8, and preparing for the subsequent airflow to be transported into the box 1.

[0034] In the above embodiments, the air passage 36 plays a strict role in limiting the airflow direction, ensuring that the airflow can only flow in an orderly manner along a preset path. Specifically, the external airflow first enters the air inlet cavity 7 and, under the action of the first air drive component 4, passes radially through the first air passage hole 37 on the air passage 36 and enters the gap area between the air passage 36 and the inner wall of the first cylinder section 31. This area corresponds to the condensation area of ​​the air inlet cavity 7. Here, the airflow fully contacts the inner wall of the first cylinder section 31 after being cooled by the cooling component 6, completing the water vapor condensation and dehumidification treatment. After the airflow dries, it passes through the second air passage hole 38 on the inner ring plate 34 and smoothly enters the flow-promoting cavity 8 inside the second cylinder section 32. Based on the above structural design, it can effectively prevent other humid airflows outside the box 1 that have not been dried from being directly drawn into the second cylinder section 32 under the driving action of the second air drive component 5. Specifically, the coordinated arrangement of the air passage cylinder 36, the first air passage hole 37 and the second air passage hole 38 strictly limits the airflow path to a fixed direction. The airflow completes the direction change operation of radial flow, axial condensation and axial conveying in sequence during the entire flow process. That is, it first flows radially through the first air passage hole 37, then dries in the condensation area, and finally passes axially through the second air passage hole 38 into the flow-promoting chamber 8. This design prevents the humid airflow from the outside that initially enters the air inlet 7, as well as the residual airflow inside the housing 1, from directly entering the second cylinder section 32. They must first enter the condensation area between the air inlet 36 and the first cylinder section 31 under the guidance of the first air outlet 37 to complete the drying process before entering the second cylinder section 32. The guiding design of the first vent 37 and the radial airflow driving effect of the first air drive component 4 work together to change the direction of the airflow. This optimizes the condensation and dehumidification process, ensures that the airflow is in full contact with the cooling inner wall and dehumidifies thoroughly, and structurally prevents the possibility of undried humid airflow being drawn into the box 1. This further improves the moisture-proof effect of the distribution box and ensures the safe operation of the internal electrical components.

[0035] It should be noted that there is room for optimization and improvement in the process of water vapor condensation and precipitation: the condensed droplets may drip onto the outer wall of the air passage 36 and then flow down the side wall to the first air passage 37. As the airflow continues to flow, these droplets will evaporate, causing some of the precipitated droplets to re-convert into water vapor, thereby reducing the efficiency of the entire condensation and drying process and affecting the moisture-proof effect. To avoid this problem and ensure the stability and thoroughness of condensation dehumidification, the present invention adopts the following structural design: like Figure 10 As shown, an installation arc plate 39 is provided between the inner wall of the first cylinder section 31 and the outer wall of the air passage 36. The installation arc plate 39 is spaced apart from the inner wall of the first cylinder section 31, and a gap is reserved between them for the guidance and collection of liquid droplets. The installation arc plate 39 is fixedly installed in the upper inner part of the first cylinder section 31 and is adapted to the position of the first air passage 37 to ensure that the airflow can pass through smoothly and complete the subsequent condensation process. To ensure normal airflow and not affect the overall efficiency of condensation and dehumidification, several third air passages 310 are evenly provided on the mounting arc plate 39. The positions of the third air passages 310 correspond to the first air passages 37 to ensure that the airflow can pass smoothly.

[0036] Based on the above structural design, the airflow condensation and droplet treatment process is further optimized: After passing through the first air passage 37 under the action of the first air drive component 4, the airflow needs to continue passing through the third air passage 310 on the mounting arc plate 39, and then impact the inner wall of the first cylinder section 31, where water vapor is condensed and precipitated on the low-temperature inner wall surface, ensuring a more complete condensation process; Compared with the aperture of the third air passage 310, the gap between the inner wall of the first cylinder section 31 and the mounting arc plate 39 is narrower. Under the adsorption of capillary action, the condensed droplets will be adsorbed into this gap and will not pass through the third air passage 310 and the first air passage 37 to drip down, effectively avoiding the situation where the droplets come into contact with the first air passage 37 and are carried by the airflow to evaporate.

[0037] As the condensation process continues, droplets accumulate in the gaps. Gravity gradually exceeds capillary adhesion, causing the droplets to slowly slide down the inner wall of the mounting arc plate 39 and eventually fall from the bottom of the mounting arc plate 39 into the inner bottom of the first cylindrical section 31. After long-term operation, condensate will gradually accumulate in the inner bottom (lower half) of the first cylindrical section 31. However, since the first vent 37 is only located in the upper half of the vent cylinder 36, the airflow will only pass through the first vent 37 in the upper half and enter the condensation area. It will not come into contact with or interfere with the condensate accumulated in the lower half of the first cylindrical section 31, and will not cause the condensate to evaporate again. This design effectively reduces the secondary evaporation of the precipitated droplets, improves the condensation and dehumidification efficiency, further ensures the dryness of the airflow entering the box 1, and improves the moisture protection effect of the distribution box.

[0038] As the condensation process continues, the amount of condensate accumulating at the bottom of the first section 31 will gradually increase. When the condensate reaches a certain amount, if it is not drained in time, the condensate level may rise, thereby contacting the lower half of the air passage 36 structure, and may even seep into the airflow channel, affecting the drying effect. To address this, the present invention makes the following structural design: like Figure 10 and Figure 12 As shown, at the connection between the outer edge of the air duct 36 and the outer edge of the first cylinder section 31, a perforation 10 is provided at the bottom position of the first cylinder section 31. The perforation 10 penetrates the mounting edge of the air duct 36 and the side wall of the first cylinder section 31, providing a channel for condensate drainage. A sealing plug 11 is inserted into the perforation 10. The sealing plug 11 is adapted to the perforation 10. A water leakage hole 12 is provided axially inside the sealing plug 11. The length of the water leakage hole 12 is greater than the depth of the perforation 10, ensuring that the water leakage hole 12 can achieve communication or sealing between the inside of the first cylinder section 31 and the outside when the sealing plug 11 is in different positions.

[0039] The sealing bolt 11 is provided with a tension buckle 13 and a limit buckle 14 at both ends. The tension buckle 13 is located at the end of the sealing bolt 11 facing the outside of the first cylinder section 31, which makes it convenient for the operator to operate from the outside of the first cylinder section 31. The limit buckle 14 is located at the end of the sealing bolt 11 facing the inside of the first cylinder section 31, which is used to limit the movement of the sealing bolt 11 and prevent the sealing bolt 11 from being pulled too much and coming out of the perforation 10. At the same time, the spring is set inside the first cylinder section 31 and sleeved on the sealing bolt 11, with one end pressing against the outer edge (inner side) of the air cylinder 36 and the other end pressing against the limit buckle 14.

[0040] Initially, the spring is compressed, and its restoring force presses the tension buckle 13 tightly against the outer wall of the first cylindrical section 31. At this time, the drain hole 12 on the sealing bolt 11 is completely inside the perforation 10, ensuring that condensate will not be discharged and preventing external humid gases and dust from entering the first cylindrical section 31 through the perforation 10, thus achieving a seal. When a large amount of condensate accumulates in the first cylindrical section 31 and needs to be drained, the tension buckle 13 is pulled downward from the outside to overcome the spring force, causing the sealing bolt 11 to move downward and the drain hole 12 to be exposed for drainage. After the condensate has been drained, the tension buckle 13 is released, the spring returns to its original position, the sealing bolt 11 is pulled upward, the tension buckle 13 is pressed tightly against the outer wall of the first cylindrical section 31 again, and the drain hole 12 returns to the perforation 10, resealing the section.

[0041] In this invention, the first air-driven assembly 4 draws gas from outside the housing 1 into the air inlet cavity 7 and pushes the airflow towards the inner wall of the air inlet cavity 7, so that the airflow smoothly enters the flow-promoting cavity 8 under the guidance of the side wall. The specific structure of the first air-driven assembly 4 is as follows: like Figure 10 As shown, the first air drive assembly 4 is installed as a whole in the air inlet cavity 7 (inside the first cylindrical section 31). It mainly consists of a drive shaft 41, a first mounting base 42, and several radial guide vanes 43. The drive shaft 41 is arranged inside the axial flow duct 3 along the axial direction. The first mounting base 42 is fixedly sleeved on the outside of the drive shaft 41 for the installation and fixation of the radial guide vanes 43. Several radial guide vanes 43 are evenly distributed on the outside of the first mounting base 42 and extend along the axial direction of the axial flow duct 3. The vane structure is adapted to the internal space of the air inlet cavity 7 to ensure that the airflow can be effectively driven when rotating.

[0042] To achieve stable rotation of the drive shaft 41, the drive shaft 41 passes through the inner circular plate 35, and a rotating bearing 44 is installed at the point where the drive shaft 41 passes through the inner circular plate 35, and the drive shaft 41 is rotatably mounted in the rotating bearing 44.

[0043] The first air drive assembly 4 is powered by a drive motor, which is fixedly installed inside the axial flow duct 3 via a dedicated mounting bracket. This mounting bracket is tightly connected to the inner wall of the axial flow duct 3 to ensure that the drive motor does not shake during operation and to guarantee operational stability. The drive end of the drive motor is fixedly connected to the end of the drive shaft 41 to form a power transmission structure. When the drive motor starts working, its drive end drives the drive shaft 41 to rotate synchronously, and the drive shaft 41 in turn drives the radial guide vanes 43 sleeved on the outside of the first mounting base 42 to rotate together.

[0044] After the drive motor starts, the drive shaft 41 drives the radial guide vane 43 to rotate at high speed. The rotating radial guide vane 43 generates radial driving force, which pushes the airflow to flow outward along the radial direction of the axial flow duct 3 until the airflow contacts the inner wall of the air inlet cavity 7 (the inner wall of the first duct section 31).

[0045] In this invention, the second air drive assembly 5 drives the airflow to flow axially along the axial flow duct 3, forming a stable axial airflow force. This allows the dried airflow, after being condensed in the air inlet chamber 7, to enter the flow-promoting chamber 8 and be smoothly and quickly transported into the housing 1. The specific structure of the second air drive assembly 5 is as follows: like Figure 10 As shown, the second wind drive assembly 5 includes a second mounting base 51 mounted outside the drive shaft 41 and a plurality of axial guide vanes 52 mounted outside the second mounting base 51. As the axial guide vane 52 rotates with the drive shaft 41, the axial guide vane 52 drives the airflow to flow axially along the axial flow duct 3.

[0046] When the drive motor starts and drives the drive shaft 41 to rotate, the drive shaft 41 synchronously drives the second mounting base 51 sleeved on its outer side to rotate. The second mounting base 51 then drives several axial guide vanes 52 to rotate at high speed. Under the rotation of the axial guide vanes 52, a driving force is generated along the axial direction of the axial flow duct 3. This driving force can continuously act on the dry airflow in the flow-promoting cavity 8, pushing the airflow to flow rapidly along the axial direction, smoothly pass through the second section 32 and the third section 33, and finally be delivered to the inside of the housing 1.

[0047] The second air drive component 5 effectively ensures the delivery efficiency of the dry airflow, ensuring that the dry airflow processed by the air inlet cavity 7 can quickly and evenly fill the interior of the box 1, promptly remove the heat generated by the electrical components, and at the same time inhibit the accumulation of moisture inside the box 1. In coordination with the first air drive component 4, cooling component 6 and other structures, it improves the moisture-proof and ventilation effect of the distribution box and ensures the long-term stable operation of the internal electrical components.

[0048] In the above embodiments, the radial guide vane 43 is generally configured as a straight blade structure, and the axial guide vane 52 is generally configured as an oblique blade structure.

[0049] In this invention, the cooling assembly 6 uniformly cools the sidewall of the axial flow fan duct 3, keeping the inner sidewall of the air inlet cavity 7 at a stable low temperature. The specific structure of the cooling assembly 6 is as follows: like Figure 7 and Figure 8 As shown, the cooling assembly 6 includes a flow pipe 61 disposed outside the first cylindrical section 31, an inlet pipe 62 connected to one end of the flow pipe 61, and an outlet pipe 63 connected to the other end of the flow pipe 61. The flow tube 61 is spirally wound around the outside of the first cylinder section 31. The spiral winding design can maximize the contact area between the flow tube 61 and the outer wall of the first cylinder section 31, ensuring that the cooling effect can be quickly and evenly transferred to the inner wall of the first cylinder section 31, thereby keeping the inner wall of the air inlet cavity 7 at a stable low temperature and ensuring that the condensation and dehumidification process is carried out efficiently. An annular chamber 64 is installed between the second cylindrical section 32 and the third cylindrical section 33. A circular rotating plate 65 is provided inside the annular chamber 64 (the rotating plate 65 has a slot for airflow to pass through). An annular groove for the rotating plate 65 to pass through is provided on the inner circumference of the annular chamber 64. The rotating plate 65 is coaxially fixed with the drive shaft 41. A propulsion plate 66 is installed in a circular array on both sides of the rotating plate 65. The propulsion plate 66 is located inside the annular chamber 64. The annular chamber 64 has an outlet 67 and an inlet 68 on different sides of its outer periphery. The end of the inlet pipe 62 is connected to the outlet 67, and the end of the outlet pipe 63 is connected to the inlet 68.

[0050] When the drive motor starts and drives the drive shaft 41 to rotate, the rotating plate 65, which is coaxially fixed with the drive shaft 41, rotates synchronously. The rotating plate 65 then drives the pusher plates 66 on both sides to rotate together inside the annular chamber 64. The rotating pusher plates 66 generate a circumferential thrust on the cooling liquid in the annular chamber 64, pushing the cooling liquid that enters the annular chamber 64 from the inlet 68 to the outlet 67 in the circumferential direction. Under the continuous action of this thrust, the cooling liquid is pushed to form a stable circulation flow between the inlet pipe 62, the flow pipe 61, the outlet pipe 63 and the annular chamber 64. There is no need to set up an additional circulation pump, which simplifies the structure, reduces energy consumption, and achieves synchronous linkage with the first air drive component 4, improving the overall operational coordination of the equipment.

[0051] Furthermore, such as Figure 5 As shown, a heat dissipation cavity 69 is provided on the top of the box 1. The liquid outlet pipe 63 passes through the box 1 and through the heat dissipation cavity 69. Several heat dissipation fins 610 are provided in the heat dissipation cavity 69. The heat dissipation fins 610 are made of a high thermal conductivity material. The liquid outlet pipe 63 passes through and connects to the heat dissipation fins 610. A fan is installed on the top of the heat dissipation cavity 69, directly opposite the heat dissipation fins 610, and a dust cover 611 is installed on the top of the housing 1, directly opposite the heat dissipation cavity 69.

[0052] The flow pipe 61 is wrapped around the outer wall of the first cylindrical section 31. After cooling the first cylindrical section 31, the cooling liquid in the flow pipe 61 absorbs the heat of the first cylindrical section 31, and the temperature rises. The heated cooling liquid flows into the heat dissipation chamber 69 through the outlet pipe 63 and passes through the heat dissipation fins 610 that are tightly attached to the outlet pipe 63. The fan blows air onto the heat dissipation fins 610 to accelerate heat dissipation and make the cooling liquid cool down quickly. The cooled cooling liquid continues to flow through the outlet pipe 63 and is poured into the interior of the annular chamber 64 through the inlet 68. Under the rotational pushing action of the rotating plate 65 and the pusher plate 66, the cooling liquid is discharged from the outlet 67 of the annular chamber 64 and re-enters the flow pipe 61 through the inlet pipe 62 to cool the first cylindrical section 31 again. This cycle is repeated to achieve continuous and stable cooling of the inner wall of the air inlet chamber 7.

[0053] In addition, the dust cover 611 has air vents for air to enter and exit. To prevent rainwater from entering the heat dissipation cavity 69 through the air vents and to prevent the heat dissipation fins 610, fan and liquid outlet pipe 63 from getting damp and damaged, affecting the heat dissipation effect and the safety of equipment operation, a waterproof cover is generally fixed on the top of the dust cover 611. The waterproof cover adopts an inclined structure design, which can effectively block rainwater and guide rainwater to slide down along the edge of the waterproof cover, preventing rainwater from seeping into the dust cover 611 and further improving the protective performance of the heat dissipation structure.

[0054] To further optimize the airflow within the housing 1, ensuring that the dry airflow delivered to the housing 1 via the axial flow fan 3 fully and evenly covers all areas of the housing 1, effectively removing heat generated by the electrical components inside the housing 1 and preventing localized heat buildup that could damage the performance of the electrical components, the present invention incorporates the following structural design: like Figure 2 As shown, an L-shaped partition plate 15 is fixedly installed inside the housing 1. The bottom of the L-shaped partition plate 15 is kept at a certain distance from the bottom of the housing 1 and does not directly contact it, leaving a channel for airflow discharge. At the same time, the L-shaped partition plate 15 divides the internal space of the housing 1 into two independent inner cavities arranged front and back, namely the first inner cavity 16 and the second inner cavity 17. The air outlet of the axial flow fan duct 3 is correspondingly set inside the second inner cavity 17, ensuring that the dry airflow delivered by the axial flow fan duct 3 can first enter the second inner cavity 17. The various electrical structures inside the distribution box are mainly installed inside the first inner cavity 16, so that the electrical components can fully contact the dry airflow and improve the heat dissipation and moisture-proof effect.

[0055] The air vent 2 at the bottom of the housing 1 is positioned directly opposite the bottom area of ​​the L-shaped partition 15, corresponding to the reserved channel between the bottom of the L-shaped partition 15 and the bottom of the housing 1, ensuring that the airflow inside the housing 1 can be smoothly discharged through the air vent 2, forming a complete airflow circulation.

[0056] A plurality of through holes 18 are evenly provided on the upright part of the L-shaped partition plate 15 (i.e. the part perpendicular to the bottom of the box 1). The through holes 18 penetrate both sides of the L-shaped partition plate 15, so that the first inner cavity 16 and the second inner cavity 17 are interconnected, forming a channel for airflow from the second inner cavity 17 into the first inner cavity 16, ensuring that the airflow can flow in an orderly manner.

[0057] The dried airflow, after being processed by the axial flow fan duct 3, first enters the second inner cavity 17. Under the continuous driving force of the second air drive assembly 5, the airflow diffuses evenly inside the second inner cavity 17 and then smoothly enters the first inner cavity 16 through several through holes 18 in the upright part of the L-shaped partition plate 15. The dried airflow entering the first inner cavity 16 can fully envelop the various electrical components installed in the cavity, efficiently remove the heat generated during the operation of the electrical components, and inhibit the accumulation of moisture on the surface of the electrical components. After completing the heat exchange, the airflow, under the squeezing action of the subsequently entering dried airflow, flows out from the reserved channel between the bottom of the L-shaped partition plate 15 and the bottom of the box 1, and enters the air passage 2 area. Finally, it is discharged outside the box 1 through the multi-layer air passage provided on the top baffle 21, connecting cylinder 22, connecting plate 23 and bottom baffle 19, forming a complete airflow circulation. This not only ensures the uniform distribution of airflow inside the box 1, but also improves the heat removal efficiency, further ensuring the long-term stable operation of the electrical components.

[0058] In rainy conditions, dust and dirty water from the outside can easily splash into the interior of the box 1 through the ventilation holes 2 at the bottom of the box 1, adhering to the surface of electrical components or seeping into the wiring interfaces, leading to poor contact of electrical components, reduced insulation performance of wiring, and even causing faults such as short circuits and corrosion, affecting the normal operation of the distribution box. To avoid the above situations, the present invention also incorporates the following structural design: like Figure 6 and Figure 11 As shown, a bottom baffle 19 is fixedly installed at the bottom of the air passage 2, and a number of first air holes 20 are evenly opened on the bottom baffle 19. A top baffle 21 is installed on the top of the air passage 2. A connecting cylinder 22 is integrally fixed to the bottom of the top baffle 21. The connecting cylinder 22 extends along the axial direction of the air passage 2, and a connecting plate 23 is fixedly connected to its bottom. The connecting plate 23 is adapted to the internal dimensions of the air passage 2. After installation, the outer edge of the connecting plate 23 fits tightly against the inner wall of the air passage 2. A second vent 24 is provided at the center of the connecting plate 23, and several third vents 25 are evenly provided on the side wall of the connecting cylinder 22. Several fourth vents 26 are evenly provided on the top baffle 21 in the area away from the connecting cylinder 22. The first vent 20, the second vent 24, the third vent 25, and the fourth vent 26 are interconnected and together form a channel for airflow to enter and exit the box 1, ensuring smooth airflow and not affecting the ventilation effect of the distribution box.

[0059] When the gas inside the housing 1 needs to be discharged, the gas enters the connecting cylinder 22 through the fourth vent 26 on the top baffle 21, then flows to the connecting plate 23 through the third vent 25 on the side wall of the connecting cylinder 22, passes through the connecting plate 23 through the second vent 24 in the center of the connecting plate 23, and finally exits the housing 1 through the first vent 20 on the bottom baffle 19.

[0060] The design of multiple channels in different directions can effectively prevent dirty water, debris and other contaminants from entering the housing 1 through the ventilation hole 2.

[0061] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A moisture-proof and ventilated distribution box, characterized in that, include: The box (1) has an air vent (2) at the bottom for airflow to enter and exit. An axial flow duct (3) is installed on the side wall of the housing (1). The axial flow duct (3) has openings at both ends, with one end facing the outside of the housing (1) and the other end facing the inside of the housing (1). An air inlet chamber (7) and a flow-promoting chamber (8) are arranged sequentially along the axial direction inside the axial flow duct (3). The first air drive assembly (4) is installed in the air inlet cavity (7). The first air drive assembly (4) brings the gas outside the box (1) into the air inlet cavity (7) and makes the airflow flow to the inner wall of the air inlet cavity (7). Under the guidance of the inner wall of the air inlet cavity (7), it enters the flow-promoting cavity (8). The second air drive assembly (5) is installed in the flow-promoting cavity (8). The second air drive assembly (5) drives the airflow to flow axially so that the airflow in the air inlet cavity (7) enters the flow-promoting cavity (8) and then flows into the box body (1). The cooling component (6) is installed on the outer wall of the axial flow fan (3) at the position corresponding to the air inlet cavity (7). The cooling component (6) cools the side wall of the axial flow fan (3) so that the water vapor in the airflow flowing through the inner side wall of the air inlet cavity (7) condenses and precipitates on the inner side wall surface of the air inlet cavity (7).

2. The moisture-proof and ventilated distribution box according to claim 1, characterized in that, The outer wall of the housing (1) is provided with mounting holes (9), and the axial flow fan (3) is installed in the mounting holes (9); The axial flow duct (3) includes a first section (31), a second section (32) and a third section (33) arranged in sequence. The air inlet cavity (7) is formed inside the first cylindrical section (31), and the flow-promoting cavity (8) is formed inside the second cylindrical section (32). The first cylindrical section (31) and the second cylindrical section (32) are connected, and an inner ring plate (34) is installed at the connection. The inner ring plate (34) is installed inside the first cylindrical section (31) and the second cylindrical section (32). An inner circular plate (35) is fixedly provided on the inner edge of the inner ring plate (34). An air passage (36) is provided inside the first cylindrical section (31). The outer edge of the air passage (36) is bent outward and installed and connected to the outer edge of the first cylindrical section (31), and the inner edge is connected to the junction of the inner ring plate (34) and the inner circular plate (35). The upper half of the air passage (36) is provided with a number of first air passage holes (37), and the inner ring plate (34) is provided with second air passage holes (38). The airflow in the first cylinder section (31) can enter the interior of the second cylinder section (32) through the first air passage holes (37) and the second air passage holes (38).

3. The moisture-proof and ventilated distribution box according to claim 2, characterized in that, An installation arc plate (39) is provided between the inner wall of the first cylindrical section (31) and the outer wall of the air passage (36), and the installation arc plate (39) is installed in the upper part of the first cylindrical section (31); The mounting arc plate (39) is provided with several third air passages (310).

4. The moisture-proof and ventilated distribution box according to claim 3, characterized in that, A perforation (10) is provided at the connection between the outer edge of the air duct (36) and the outer edge of the first cylinder section (31), and the perforation (10) is provided at the bottom of the first cylinder section (31); A sealing plug (11) is provided on the perforation (10). A water leakage hole (12) is provided on the sealing plug (11). A tension buckle (13) is provided on one end of the sealing plug (11) facing the outside of the first cylindrical section (31), and a limit buckle (14) is provided on the other end facing the inside of the first cylindrical section (31). A spring is provided on the outer sleeve of the sealing plug (11). The spring is located inside the first cylindrical section (31), and one end of the spring abuts against the outer edge of the air passage (26), and the other end abuts against the limit buckle (14).

5. The moisture-proof and ventilated distribution box according to claim 4, characterized in that, The first wind drive assembly (4) includes a drive shaft (41) disposed in the axial flow duct (3), a first mounting seat (42) mounted outside the drive shaft (41), and a plurality of radial guide vanes (43) mounted outside the first mounting seat (42). The drive shaft (41) passes through the inner circular plate (35), and a rotating bearing (44) is installed at the through point. The drive shaft (41) is mounted on the rotating bearing (44), and the radial guide vanes (43) are arranged axially along the axial flow duct (3). When the radial guide vane (43) rotates following the drive shaft (41), the radial guide vane (43) drives the airflow to flow radially along the axial flow duct (3).

6. The moisture-proof and ventilated distribution box according to claim 5, characterized in that, The second wind drive assembly (5) includes a second mounting base (51) mounted outside the drive shaft (41) and a plurality of axial guide vanes (52) mounted outside the second mounting base (51). When the axial guide vane (52) rotates with the drive shaft (41), the axial guide vane (52) drives the airflow to flow axially along the axial flow duct (3).

7. The moisture-proof and ventilated distribution box according to claim 1, characterized in that, The cooling assembly (6) includes a flow pipe (61) disposed outside the first cylindrical section (31), an inlet pipe (62) connected to one end of the flow pipe (61), and an outlet pipe (63) connected to the other end of the flow pipe (61). The flow tube (61) is spirally wound around the outside of the first cylindrical section (31). An annular chamber (64) is installed between the second cylindrical section (32) and the third cylindrical section (33). A rotating plate (65) is provided inside the annular chamber (64). An annular groove is provided on the inner circumference of the annular chamber (64) for the rotating plate (65) to pass through. The rotating plate (65) is coaxially fixed with the drive shaft (41). A propulsion plate (66) is installed in a circular array on both sides of the rotating plate (65). The propulsion plate (66) is located inside the annular chamber (64). The annular chamber (64) is provided with an outlet (67) and an inlet (68) on different sides of its outer periphery. The end of the inlet pipe (62) is connected to the outlet (67), and the end of the outlet pipe (63) is connected to the inlet (68).

8. The moisture-proof and ventilated distribution box according to claim 7, characterized in that, The top of the box (1) is provided with a heat dissipation cavity (69), the liquid outlet pipe (63) passes through the box (1) and through the heat dissipation cavity (69), a plurality of heat dissipation fins (610) are provided in the heat dissipation cavity (69), and the liquid outlet pipe (63) passes through and connects to the heat dissipation fins (610). A fan is installed on the top of the heat dissipation cavity (69) directly opposite the heat dissipation fins (610), and a dust cover (611) is provided on the top of the housing (1) directly opposite the heat dissipation cavity (69).

9. The moisture-proof and ventilated distribution box according to claim 1, characterized in that, The box (1) is provided with an L-shaped partition plate (15), the bottom of the L-shaped partition plate (15) is far away from the bottom of the box (1), and divides the inside of the box (1) into a first inner cavity (16) and a second inner cavity (17) arranged in front and behind. The axial flow duct (3) is arranged in the second inner cavity (17). The air vent (2) is directly opposite the bottom of the L-shaped partition plate (15); The upright portion of the L-shaped partition plate (15) has several through holes (18), and the first inner cavity (16) is connected to the second inner cavity (17) through the through holes (18).

10. The moisture-proof and ventilated distribution box according to claim 1, characterized in that, The bottom of the air passage (2) is equipped with a bottom baffle (19), and the bottom baffle (19) has a plurality of first air holes (20). A top baffle (21) is installed on the top of the air passage (2), a connecting cylinder (22) is installed on the bottom of the top baffle (21), a connecting plate (23) is connected to the bottom of the connecting cylinder (22), the connecting plate (23) is placed inside the air passage (2), and the outer edge of the connecting plate (23) is tightly fitted to the inner wall of the air passage (2); The connecting plate (23) has a second air hole (24) at its center, the connecting cylinder (22) has several third air holes (25) on its side wall, and the top baffle (21) has a fourth air hole (26) at a position away from the connecting cylinder (22). The gas inside the box (1) can be discharged outside the box (1) in sequence through the fourth air hole (26), the third air hole (25), the second air hole (24) and the first air hole (20).

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