Double-layer self-breathing anti-condensation intelligent power distribution box shell and power distribution box

Abstract

This invention relates to the field of electrical distribution box technology, specifically to a double-layer self-breathing anti-condensation intelligent electrical distribution box shell and distribution box, including a protective outer shell for accommodating the distribution box body, a first louvered plate on the protective outer shell for connecting the internal mounting cavity with the external environment, and a pair of air guiding devices fixed inside the protective outer shell. A sealing component is provided inside the protective outer shell at the first louvered plate, and a drying chamber is provided within the air guiding devices. Under normal operating conditions, this invention achieves natural ventilation and heat dissipation by utilizing the chimney effect formed by the first louvered plate and the air vents on the top cover, requiring no additional energy consumption; under high humidity conditions, the sealing component automatically closes the air inlet to cut off the external moisture source, switching to active dehumidification mode, realizing adaptive switching between natural heat dissipation and active dehumidification modes.

Description

Technical Field

[0001] This invention relates to the field of distribution box equipment technology, and more specifically, to a double-layer self-breathing anti-condensation intelligent distribution box shell and distribution box. Background Technology

[0002] In power distribution systems, outdoor distribution boxes are widely used in urban power grids, industrial parks, and rural power grids. These boxes house electrical components such as circuit breakers, contactors, relays, and busbars, all of which are highly sensitive to humidity levels in their operating environment. However, outdoor distribution boxes are constantly exposed to the natural environment. When the internal temperature of the box is higher than the external ambient temperature, and there are significant temperature fluctuations between day and night or high humidity, the humid air inside the box is easily condensed on the surfaces of the electrical components and the inner walls of the box upon cooling.

[0003] Patent application CN202610651967.9 discloses a modular safety distribution box assembly and distribution box, including: a box body; an intelligent busbar structure, which is set inside the box body for electrical connection. The intelligent busbar structure has a sensor structure and an independent coolant flow channel branch structure embedded inside. The whole utilizes the intelligent busbar structure with distributed optical fiber sensing and an independent microfluidic network embedded inside to realize millisecond-level direct measurement of the temperature of each electrical connection point and point-to-point liquid targeted cooling.

[0004] In existing technologies, anti-condensation measures mainly involve installing heaters inside the distribution box to raise the temperature inside the box and reduce the relative humidity, thus preventing condensation. However, heaters consume a lot of energy during long-term operation and cannot remove moisture from the box, so the condensation problem still exists after the temperature drops. Alternatively, an independent dehumidifier or condensation dehumidification device can be installed inside the distribution box, but such equipment is bulky, expensive, and requires separate power supply and control, making it unsuitable for small and medium-sized distribution boxes with limited space.

[0005] In view of this, this application proposes a double-layer self-breathing anti-condensation intelligent distribution box housing and distribution box. Summary of the Invention

[0006] The purpose of this invention is to provide a double-layer self-breathing anti-condensation intelligent power distribution box housing and power distribution box. The flip plate achieves one-way opening and closing by gravity, and the reciprocating motion of the piston plate forms a bellows-like airflow drive, so that the external air enters the housing through the filter and the first louver, and is dehumidified after passing through the air inlet slot, the air exchange chamber and the drying box in sequence, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A double-layer self-breathing anti-condensation intelligent distribution box housing includes a protective outer shell for accommodating the distribution box body, the protective outer shell is provided with a first louver for connecting the internal installation cavity with the external environment, and a pair of air guiding devices are fixed inside the protective outer shell;

[0009] The protective housing has a sealing component at the first louver and a drying chamber inside the air guiding device.

[0010] The air guiding device includes an air exchange chamber, an air guiding part disposed at the top of the air exchange chamber, and two flaps. The air exchange chamber includes a horizontal air inlet chamber and a vertical air outlet chamber. The wall of the horizontal air inlet chamber is provided with an air inlet end that communicates with the external environment of the air exchange chamber. The top of the wall of the vertical air outlet chamber is provided with an air outlet end that communicates with the internal environment of the air exchange chamber. There are two flaps, which are respectively disposed at the air inlet end and the air outlet end, and are used to control the unidirectional flow of airflow.

[0011] The bottom of the ventilation chamber is provided with a second louver; the drying box is located on the airflow path between the ventilation chamber and the second louver.

[0012] The air guide section includes an air guide fan driven by a motor to rotate and a piston plate driven by a motor to reciprocate. When the piston plate reciprocates, the flaps open and close alternately, driving the external airflow through the drying chamber and then out through the second louver to maintain the dryness of the internal environment of the protective shell.

[0013] In the technical solution of the present invention, the protective shell includes an outer frame, a frame door hinged to the opening of the outer frame, a top cover and a base fixedly connected to the upper and lower ends of the outer frame by bolts, and a waterproof cover fixedly connected to the top of the top cover by bolts.

[0014] In the technical solution of the present invention, two square grooves are provided through the outer wall of the outer frame, the first louver is fixedly connected to the bottom end of the side wall of both ends of the outer frame by screws, the top cover is provided with air holes, and a gap is formed between the waterproof cover and the top cover for airflow to be discharged.

[0015] In the technical solution of the present invention, the sealing assembly includes an electric actuator fixedly connected to the inner wall of the outer frame by screws, a crossbar driven by the electric actuator, round rods snapped onto the bottom surfaces of both ends of the crossbar, a sealing plate snapped onto the bottom ends of the two round rods, and a positioning frame sleeved on the outside of the sealing plate; the crossbar is fixedly connected to the telescopic end of the electric actuator, and the round rods slide through the positioning frame.

[0016] In the technical solution of the present invention, two through slots are provided at the top of the side wall of the outer frame, and a filter screen for filtering air is fixedly connected to the outer frame on the outside of the through slots by screws.

[0017] In the technical solution of the present invention, there are two air guiding devices, which are symmetrically arranged on both sides inside the protective shell; the air exchange chamber has an inverted L-shaped structure in the longitudinal section, the air inlet end of the air exchange chamber is provided with an air inlet groove, the air outlet end of the air exchange chamber is provided with an exhaust groove, and two flaps are respectively rotatably arranged at the air inlet groove and the exhaust groove. The air inlet groove is connected to the filter screen on the protective shell.

[0018] In the technical solution of the present invention, the air guide part further includes a rotating shaft coaxially connected to the output shaft of the motor, a main bevel gear tightly sleeved on the outer wall of the rotating shaft, a secondary bevel gear perpendicularly meshing with the main bevel gear, and a reciprocating screw precisely sleeved inside the secondary bevel gear; the fan blades inside the air guide fan are sleeved on the top of the rotating shaft and rotate with it, and the piston plate is slidably disposed in the air exchange chamber and threadedly engaged with the reciprocating screw.

[0019] In the technical solution of the present invention, the two flaps rely on gravity to reset so as to achieve unidirectional airflow; when the piston plate moves in the first direction, the flap at the air inlet end opens and the flap at the air outlet end closes, and the airflow enters the air exchange chamber from the air inlet end; when the piston plate moves in the second direction, the flap at the air inlet end closes and the flap at the air outlet end opens, and the airflow is discharged from the air outlet end to the drying box.

[0020] In the technical solution of the present invention, an air guide grille is snapped onto the horizontal bottom surface of the top of the ventilation chamber, the second louver is connected to the inside of the protective shell, and the drying box is disposed between the air guide grille and the second louver, so that the airflow discharged from the ventilation chamber passes through the drying box and is then guided into the inside of the protective shell by the second louver. The drying box is filled with a desiccant to absorb moisture in the airflow.

[0021] On the other hand, the present invention also provides a distribution box using the above-mentioned double-layer self-breathing anti-condensation intelligent distribution box shell, including a distribution box body fixed to the top of the base, and heat dissipation holes on both sides of the distribution box body, wherein the horizontal height of the heat dissipation holes is higher than the horizontal height of the first louver.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. The double-layer self-breathing anti-condensation intelligent power distribution box shell and power distribution box achieve natural ventilation and heat dissipation under normal working conditions by utilizing the chimney effect formed by the first louver and the air holes on the top cover, without the need for additional energy consumption; under high humidity conditions, the sealing component automatically closes the air inlet to cut off the external moisture source and switches to active dehumidification mode, realizing the dual-mode adaptive switching of natural heat dissipation and active dehumidification.

[0024] 2. The double-layer self-breathing anti-condensation intelligent power distribution box housing and power distribution box simultaneously install a guide fan and a main bevel gear on the main shaft of the same motor. While driving the guide fan to rotate and guide the airflow, the reciprocating screw is driven by the bevel gear pair to drive the piston plate to reciprocate. One motor realizes both the guiding and suction functions at the same time, without the need for an additional independent drive device, thus simplifying the power system structure.

[0025] 3. The double-layer self-breathing anti-condensation intelligent power distribution box and its housing utilize a flap that opens and closes in one direction by gravity. This, combined with the reciprocating motion of a piston plate, creates a bellows-like airflow drive, allowing external air to enter the housing through a filter and the first louver. The air then passes through the air inlet slot, the air exchange chamber, and the drying chamber before being dehumidified. Finally, the second louver guides the dry airflow into the housing, achieving active circulation and dehumidification of the internal environment and effectively preventing condensation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram showing the overall structure of the present invention broken down;

[0028] Figure 3 This is a structural breakdown diagram of the protective outer shell in this invention;

[0029] Figure 4 This is a partial cross-sectional schematic diagram of the protective shell in this invention;

[0030] Figure 5 This is a schematic diagram of the top cover structure in this invention;

[0031] Figure 6 This is a schematic diagram of the waterproof cover in this invention;

[0032] Figure 7 This is a schematic diagram of the sealing assembly in this invention;

[0033] Figure 8 This is a schematic diagram of the gas guiding device in this invention;

[0034] Figure 9 This is a cross-sectional schematic diagram of the air guiding device in this invention;

[0035] Figure 10 This is a cross-sectional schematic diagram of the ventilation chamber in this invention;

[0036] Figure 11 This is a schematic diagram showing the state of the piston plate moving in the first direction in this invention;

[0037] Figure 12 This is a schematic diagram showing the state of the piston plate moving in the second direction in this invention;

[0038] Figure 13 This is a schematic diagram of the air guide section in this invention;

[0039] Figure 14 This is a schematic diagram of the structure of the distribution box body in this invention;

[0040] Explanation of reference numerals in the attached figures:

[0041] 100. Protective outer shell; 110. Outer frame; 111. Square channel; 120. Frame door; 130. Base; 140. Top cover; 150. Waterproof cover; 160. Sealing assembly; 161. Electric actuator; 162. Crossbar; 163. Round rod; 164. Sealing plate; 165. Positioning frame; 170. Drying oven; 180. First louver; 190. Filter screen;

[0042] 200. Distribution box body;

[0043] 300. Air guiding device; 310. Air exchange chamber; 311. Air inlet slot; 312. Exhaust slot; 320. Air guiding section; 321. Motor; 322. Rotating shaft; 323. Air guiding fan; 324. Main bevel gear; 325. Secondary bevel gear; 326. Reciprocating screw; 327. Piston plate; 330. Flip plate; 340. Second louvered plate; 350. Air guiding grille. Detailed Implementation

[0044] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0045] Please see Figures 1-6 As shown, this embodiment provides a technical solution:

[0046] A double-layer self-breathing anti-condensation intelligent distribution box housing includes a protective shell 100 for accommodating the distribution box body 200, and a pair of air guiding devices 300 are fixed inside the protective shell 100; the protective shell 100 serves as the basic framework and protective barrier of the entire system, accommodating the distribution box body 200 and providing installation support for the internal components.

[0047] Furthermore, the protective housing 100 includes an outer frame 110, a frame door 120 hinged to the opening of the outer frame 110, a top cover 140 and a base 130 bolted to the upper and lower ends of the outer frame 110, a waterproof cover 150 bolted to the top of the top cover 140, and a first louver 180 for connecting the internal installation cavity with the external environment. A sealing assembly 160 is provided inside the protective housing 100 at the first louver 180, and a drying chamber 170 is provided within the air guiding device 300. The drying chamber 170 is filled with desiccant to absorb moisture from the airflow. Two square grooves 111 are formed through the outer wall of the outer frame 110. The first louver 180 is bolted to the bottom ends of the side walls at both ends of the outer frame 110. The top cover 140 has air holes, and a gap is formed between the waterproof cover 150 and the top cover 140 for airflow. Two through slots are provided at the top of the side wall of the outer frame 110. A filter screen 190 for filtering air is fixedly connected to the outer frame 110 on the outside of the through slots by screws. Under normal operating conditions, the first louver 180 is open, and the hot air inside the protective shell 100 is discharged upward through the air hole of the top cover 140. The ambient air enters the protective shell 100 through the first louver 180, forming a chimney effect for natural ventilation and heat dissipation. When the humidity inside the protective shell 100 exceeds a preset threshold, the sealing component 160 closes the first louver 180 and the air guiding device 300 is activated to perform forced circulation dehumidification.

[0048] Among them, the preferred one is according to Figure 7 As shown, the sealing assembly 160 includes an electric actuator 161 fixedly connected to the inner wall of the outer frame 110 by screws, a crossbar 162 driven by the electric actuator 161, round rods 163 snapped onto the bottom surfaces of both ends of the crossbar 162, a sealing plate 164 snapped onto the bottom ends of the two round rods 163, and a positioning frame 165 sleeved on the outside of the sealing plate 164; the crossbar 162 is fixedly connected to the telescopic end of the electric actuator 161, and the round rods 163 slide through the positioning frame 165. The round rods 163 are two cylindrical guide rods, the bottom ends of which are snapped onto the sealing plate 164. The sealing plate 164 is a rectangular plate structure, the outer contour of which is adapted to the opening size of the square groove 111, and is used to cover and close the airflow channel of the first louver 180 when descending. The positioning frame 165 is a rectangular frame structure, fitted onto the outside of the sealing plate 164, and fixed to the inner wall of the outer frame 110 by screws. The round rod 163 slides through the positioning frame 165. The positioning frame 165 is used to limit the vertical movement trajectory of the sealing plate 164, ensuring that the sealing plate 164 does not tilt during the lifting and lowering process. When the telescopic end of the electric push rod 161 extends, it pushes the sealing plate 164 downward along the positioning frame 165 through the crossbar 162 and the round rod 163. The bottom surface of the sealing plate 164 is in contact with the top of the first louver 180, sealing the airflow channel. When the telescopic end of the electric push rod 161 retracts, it drives the sealing plate 164 to slide upward, opening the airflow channel.

[0049] Please see Figures 8-12 As shown, in this embodiment, there are two air guiding devices 300, symmetrically arranged on both sides inside the protective shell 100. Each air guiding device 300 includes an air exchange chamber 310, an air guiding section 320 located at the top of the air exchange chamber 310, and two flaps 330. A second louvered plate 340 is provided at the bottom of the air exchange chamber 310, and an air guiding grille 350 is snapped onto the bottom surface of the horizontal chamber at the top of the air exchange chamber 310. The air exchange chamber 310 includes a horizontal air inlet chamber and a vertical exhaust chamber. The wall of the horizontal air inlet chamber has an air inlet end communicating with the external environment of the air exchange chamber 310, and the top of the wall of the vertical exhaust chamber has an exhaust end communicating with the internal environment of the air exchange chamber 310. Two flaps 330 are respectively located at the air inlet end and the exhaust end to control the unidirectional flow of air. The drying chamber 170 is located on the airflow path between the air exchange chamber 310 and the second louvered plate 340. The ventilation chamber 310 has an inverted L-shaped structure in longitudinal section. The air inlet end of the ventilation chamber 310 is provided with an air inlet groove 311, and the air outlet end of the ventilation chamber 310 is provided with an exhaust groove 312. Two flaps 330 are respectively rotatably set at the air inlet groove 311 and the exhaust groove 312. The air inlet groove 311 is connected to the filter screen 190 on the protective shell 100.

[0050] Furthermore, the second louver 340 is connected to the interior of the protective housing 100, and the drying chamber 170 is disposed between the air guide grille 350 and the second louver 340, so that the airflow discharged from the air exchange chamber 310 passes through the drying chamber 170 and is then introduced into the interior of the protective housing 100 by the second louver 340.

[0051] Among them, the preferred one is according to Figure 13 As shown, the air guide section 320 includes an air guide fan 323 driven to rotate by a motor 321 and a piston plate 327 driven to reciprocate by the motor 321. It also includes a rotating shaft 322 coaxially connected to the output shaft of the motor 321, a main bevel gear 324 tightly fitted onto the outer wall of the rotating shaft 322, a secondary bevel gear 325 perpendicularly meshing with the main bevel gear 324, and a reciprocating lead screw 326 precisely fitted inside the secondary bevel gear 325. When the piston plate 327 reciprocates, the flap 330 alternately opens and closes, driving external airflow through the drying chamber 170 and out through the second louver 340 to maintain the dryness of the internal environment of the protective casing 100.

[0052] Furthermore, the fan blades inside the air guide fan 323 are sleeved on the top of the rotating shaft 322 and rotate with it. The piston plate 327 is slidably disposed in the air exchange chamber 310 and threadedly engaged with the reciprocating screw 326. The motor 321 drives the air guide fan 323 to rotate and the main bevel gear 324 to rotate simultaneously through the rotating shaft 322. The main bevel gear 324 drives the reciprocating screw 326 to rotate through the secondary bevel gear 325, thereby causing the piston plate 327 to reciprocate within the air exchange chamber 310. Two flaps 330 rely on gravity to reset and achieve unidirectional airflow. Their working principle is similar to that of a one-way valve: when the airflow flows from one side to the other, the airflow pressure pushes the flap 330 to rotate around the hinge axis to open the channel; when the airflow flows in the opposite direction, the flap 330 falls back under the action of gravity to close the channel and prevent the airflow from flowing backward. That is to say, when the piston plate 327 moves in the first direction, the flap at the air inlet end opens and the flap at the air outlet end closes, and the airflow enters the air exchange chamber 310 from the air inlet end; when the piston plate 327 moves in the second direction, the flap at the air inlet end closes and the flap at the air outlet end opens, and the airflow is discharged from the air outlet end to the drying chamber 170. The reciprocating motion of the piston plate 327, in conjunction with the alternating opening and closing of the flaps 330, forms a "bellows" type airflow drive, continuously guiding the external air to the drying chamber 170.

[0053] Please see Figure 14 This invention discloses a distribution box using the aforementioned double-layer self-breathing anti-condensation intelligent distribution box housing. It includes a distribution box body 200 fixed to the top of the base 130 within the protective outer shell 100. Both sides of the distribution box body 200 have heat dissipation holes, the horizontal height of which is higher than the horizontal height of the first louver 180. The distribution box body 200 is a conventional internal electrical component assembly, housing circuit breakers, contactors, relays, busbars, and other electrical components. The distribution box body 200 is electrically connected to an external power source and load via wires. The heat generated by the distribution box body 200 during operation raises the temperature of the air inside the protective outer shell 100. The hot air rises and is discharged through the vents in the top cover 140, while external cold air enters the housing through the first louver 180, creating a chimney effect for natural ventilation and heat dissipation.

[0054] The double-layer self-breathing anti-condensation intelligent power distribution box housing and power distribution box of the present invention include the following two working modes during use:

[0055] Natural ventilation and heat dissipation mode:

[0056] Reference Figures 1-2As shown, when the humidity inside the protective housing 100 is lower than a preset threshold, the temperature and humidity sensor configured inside the housing detects and feeds back to the intelligent controller. The electric push rod 161 of the sealing component 160 drives the sealing plate 164 to rise, opening the airflow channel of the first louver 180. The heat generated by the operation of the distribution box body 200 raises the temperature of the air inside the protective housing 100. According to the principle of hot air rising, the hot air is discharged upward through the air hole of the top cover 140, and the cold air from the outside environment enters the interior of the protective housing 100 through the first louver 180, forming a natural ventilation and heat dissipation with a chimney effect. During this process, the air guiding device 300 is in standby mode and does not consume electrical energy, realizing zero-energy heat dissipation of the distribution box under normal operating conditions.

[0057] Active dehumidification mode:

[0058] When the humidity inside the protective casing 100 reaches or exceeds a preset threshold, typically a relative humidity of ≥80%, the intelligent controller determines that there is a risk of condensation and activates the active dehumidification mode; the electric push rod 161 of the sealing component 160 drives the sealing plate 164 to descend, closing the airflow channel of the first louver 180 and cutting off the source of external moisture; the intelligent controller activates the air guiding device 300, the motor 321 starts, and simultaneously drives the air guiding fan 323 to rotate and the main bevel gear 324 to rotate through the rotating shaft 322. The main bevel gear 324 drives the reciprocating screw 326 to rotate through the secondary bevel gear 325, causing the piston plate 327 to reciprocate vertically within the air exchange chamber 310;

[0059] When the piston plate 327 moves downward, the inlet flap 330 opens and the exhaust flap 330 closes, allowing humid air inside the protective housing 100 to be drawn into the ventilation chamber 310 through the filter 190 and the inlet slot 311. When the piston plate 327 moves in the first direction, i.e. towards the inlet, the inlet flap 330 closes and the exhaust flap 330 opens, allowing humid air inside the ventilation chamber 310 to be discharged through the exhaust slot 312. After passing evenly through the drying chamber 170, the moisture in the air is absorbed by the desiccant to form a dry airflow, which is finally guided into the protective housing 100 by the second louver 340. The piston plate 327 continues to reciprocate, coordinating with the alternating opening and closing of the flap 330 to form a circulating airflow, continuously dehumidifying the air inside the protective housing 100, keeping the relative humidity inside the housing below a safe threshold, and effectively preventing condensation.

[0060] When the humidity inside the protective casing 100 returns to below the safe threshold, typically relative humidity ≤60%, the intelligent controller shuts off the air duct device 300, the motor 321 stops running, the electric push rod 161 drives the sealing plate 164 to rise, restoring the airflow channel of the first louver 180, and the distribution box switches back to natural ventilation and heat dissipation mode.

[0061] Finally, it should be noted that the motor 321, electric actuator 161, temperature and humidity sensor, intelligent controller, etc. involved in this invention are all general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods. In the idle parts of this device, each electrical component is connected to an external power supply and intelligent controller through wires, and a temperature and humidity sensor is configured to achieve automatic switching control. The specific connection methods should refer to the working principle in this invention. The electrical connections between each electrical component are completed in the order of their operation, and the detailed connection methods are all technologies known in the art.

[0062] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the specification and its equivalents.

Claims

1. A double-layer self-breathing anti-condensation intelligent distribution box housing, comprising a protective outer shell for accommodating the distribution box body, wherein the protective outer shell is provided with a first louver for connecting the internal mounting cavity with the external environment, characterized in that: A pair of air guiding devices are fixed inside the protective shell; The protective housing has a sealing component at the first louver and a drying chamber inside the air guiding device. The air guiding device includes an air exchange chamber, an air guiding part disposed at the top of the air exchange chamber, and two flaps. The air exchange chamber includes a horizontal air inlet chamber and a vertical air outlet chamber. The wall of the horizontal air inlet chamber is provided with an air inlet end that communicates with the external environment of the air exchange chamber. The top of the wall of the vertical air outlet chamber is provided with an air outlet end that communicates with the internal environment of the air exchange chamber. There are two flaps, which are respectively disposed at the air inlet end and the air outlet end, and are used to control the unidirectional flow of airflow. The bottom of the ventilation chamber is provided with a second louver; the drying box is located on the airflow path between the ventilation chamber and the second louver. The air guide section includes an air guide fan driven by a motor to rotate and a piston plate driven by a motor to reciprocate. When the piston plate reciprocates, the flaps open and close alternately, driving the external airflow through the drying chamber and then out through the second louver to maintain the dryness of the internal environment of the protective shell.

2. The double-layer self-breathing anti-condensation intelligent distribution box housing according to claim 1, characterized in that: The protective housing includes an outer frame, a frame door hinged to the opening of the outer frame, a top cover and a base fixed to the upper and lower ends of the outer frame by bolts, and a waterproof cover fixed to the top of the top cover by bolts.

3. The double-layer self-breathing anti-condensation intelligent distribution box housing according to claim 2, characterized in that: The outer wall of the outer frame has two square grooves running through it. The first louver is fixedly connected to the bottom of the side walls at both ends of the outer frame by screws. The top cover has air holes, and a gap is formed between the waterproof cover and the top cover to allow airflow to escape.

4. The double-layer self-breathing anti-condensation intelligent distribution box housing according to claim 3, characterized in that: The sealing assembly includes an electric actuator fixed to the inner wall of the outer frame by screws, a crossbar driven by the electric actuator, round rods snapped onto the bottom surfaces of both ends of the crossbar, a sealing plate snapped onto the bottom ends of the two round rods, and a positioning frame sleeved on the outside of the sealing plate; the crossbar is fixedly connected to the telescopic end of the electric actuator, and the round rods slide through the positioning frame.

5. The double-layer self-breathing anti-condensation intelligent distribution box housing according to claim 4, characterized in that: Two through slots are provided at the top of the side wall of the outer frame, and a filter screen for filtering air is fixedly connected to the outer frame outside the through slots by screws.

6. The double-layer self-breathing anti-condensation intelligent distribution box housing according to claim 5, characterized in that: Two air guiding devices are symmetrically arranged on both sides inside the protective shell; the air exchange chamber has an inverted L-shaped structure in the longitudinal section, with an air inlet slot at the air inlet end and an exhaust slot at the air outlet end. Two flaps are respectively rotatably arranged at the air inlet slot and the exhaust slot, and the air inlet slot is connected to the filter screen on the protective shell.

7. The double-layer self-breathing anti-condensation intelligent distribution box housing according to claim 6, characterized in that: The air guide section also includes a rotating shaft coaxially connected to the motor output shaft, a main bevel gear tightly fitted on the outer wall of the rotating shaft, a secondary bevel gear perpendicularly meshing with the main bevel gear, and a reciprocating screw precisely fitted inside the secondary bevel gear; the fan blades inside the air guide fan are fitted on the top of the rotating shaft and rotate with it, and the piston plate is slidably disposed in the air exchange chamber and threadedly engaged with the reciprocating screw.

8. The double-layer self-breathing anti-condensation intelligent distribution box housing according to claim 7, characterized in that: The two flaps rely on gravity to reset so as to achieve unidirectional airflow; when the piston plate moves in the first direction, the flap at the air inlet opens and the flap at the air outlet closes, and the airflow enters the air exchange chamber from the air inlet; when the piston plate moves in the second direction, the flap at the air inlet closes and the flap at the air outlet opens, and the airflow is discharged from the air outlet to the drying chamber.

9. The double-layer self-breathing anti-condensation intelligent distribution box housing according to claim 8, characterized in that: An air guide grille is snapped onto the bottom surface of the horizontal compartment at the top of the ventilation chamber. The second louver is connected to the inside of the protective shell. The drying box is located between the air guide grille and the second louver, so that the airflow discharged from the ventilation chamber passes through the drying box and is then guided into the inside of the protective shell by the second louver. The drying box is filled with desiccant to absorb moisture in the airflow.

10. A distribution box, using the double-layer self-breathing anti-condensation intelligent distribution box shell as described in claim 9, characterized in that: It includes a power distribution box body fixed to the top of the base, and heat dissipation holes are provided on both sides of the power distribution box body. The horizontal height of the heat dissipation holes is higher than the horizontal height of the first louver plate.

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