CN219203904U - Block terminal convenient to it is dampproofing - Google Patents

Abstract

The utility model relates to a block terminal convenient to dampproofing, the power distribution box comprises a box body, rotate the case lid that sets up the chamber door on the box and fixed set up in the top of box, be equipped with roof and two blocks of curb plates in the box, roof and two blocks of curb plate cooperation form the installation cavity that is used for installing electrical components, two intake cavities are formed in the both sides cooperation of two blocks of curb plates and box, the top cooperation of roof and box forms the exhaust chamber, the air inlet has all been seted up to the both sides of box, be provided with the dehumidification mechanism that is used for dehumidifying the air that gets into the air inlet from the air inlet in the air chamber in the box, the intercommunication mouth has been seted up on the curb plate, intercommunication inlet chamber and installation cavity, intercommunication mouth department is provided with and is used for dehumidifying the air that gets into the installation cavity from the intercommunication mouth, still be provided with in the box and be used for discharging the radiating component outside the box to the heat of installation intracavity. The utility model has the advantages of dehumidification is effectual, do not influence the normal heat extraction in the box, reach the steady operation's of maintenance effect of block terminal.

Description

Block terminal convenient to it is dampproofing

Technical Field

The utility model relates to the technical field of distribution box equipment, in particular to a distribution box convenient to prevent moisture.

Background

The distribution box is electric equipment, has the characteristics of small volume, simple installation, special technical performance, fixed position, unique configuration function, no limit of places, more common application, stable and reliable operation, high space utilization rate, small occupied area and environmental protection effect. The traditional outdoor distribution box comprises a box body, a box door which is arranged on the box body in a rotating mode and a box cover which is fixedly arranged at the top of the box body, and the traditional distribution box is further provided with vent holes on the left wall and the right wall so as to achieve the radiating effect through the flowing of air flow. However, since the distribution box is installed outdoors, humid air may enter the box body from the ventilation holes in rainy and snowy days, resulting in damage to the electric power equipment in the box body due to the humidity.

In the related art, a chinese patent with publication number CN205231497U discloses a dampproof distribution box, which comprises a base, a box body connected on the base and surrounded by four side plates and a box cover connected on the box body, wherein one side plate is connected with a box door, a baffle is connected between adjacent side plates, a gap is left between the baffle and the box cover, a cavity for accommodating an electric heating tube is arranged between the baffle and the side plate, the electric heating tube is connected with the baffle through a mounting seat, an air inlet communicated with the cavity is arranged at the lower part of the side plate, a cavity is arranged inside the base, a humidity sensor and a controller are arranged in the cavity, a fan is arranged on the inner wall of the base, an air outlet matched with the fan is arranged on the side wall of the base, a ventilation plate is arranged between the base and the side plate, and through holes are uniformly distributed on the ventilation plate; the electric heating tube is used for heating the air entering the box body, and the heated air dehumidifies the electric equipment, so that the electric equipment is ensured to be dried, and the electric equipment is prevented from being damaged due to damp.

However, the dampproof distribution box in the related art adopts heating air and blows the hot air into the distribution box to achieve the purpose of dehumidifying the power equipment, electric energy is consumed in the process of heating the air, the heating air and blowing the hot air in the dehumidifying process, the energy consumption is large, the power equipment needs to release heat during working, the temperature of the power equipment is further improved due to the hot air, and potential safety hazards exist.

Disclosure of Invention

In order to improve dampproofing block terminal among the correlation technique at dehumidification in-process electric energy consumption great, and the heating air dehumidifies power equipment and can lead to power equipment temperature to further improve, has the phenomenon of potential safety hazard, this application provides a dampproofing block terminal of being convenient for.

The application provides a block terminal convenient to dampproofing adopts following technical scheme:

the utility model provides a block terminal convenient to dampproofing, includes the box, rotates the case lid that sets up the chamber door on the box and fixed setting up in the top of box, be provided with roof and two curb plates in the box, the both sides of roof are fixed connection in two relative inner walls of box respectively, two the curb plate symmetry sets up in the both sides of the bottom of roof, roof and two curb plate cooperation form the installation cavity that is used for installing electrical components, two the both sides cooperation of curb plate and box forms two inlet cavities, roof and the top cooperation of box form the exhaust chamber, the air inlet has all been seted up to the both sides of box, two the air inlet communicates with two inlet cavities respectively, be provided with the dehumidification mechanism that is used for dehumidifying the air that gets into the air chamber from the air inlet in the box, the intercommunication mouth intercommunication inlet cavity and installation cavity, intercommunication mouth department is provided with and is used for carrying out the dehumidification piece to the air that gets into the installation cavity from the intercommunication mouth, still be provided with the radiating component that is used for discharging the heat outside the box of installation cavity.

Through adopting above-mentioned technical scheme, when power equipment normally operates, outside the heat that will install intracavity power equipment produced through radiator unit discharges the box, external air gets into the installation intracavity through the intercommunication mouth after the air inlet gets into the air inlet intracavity constantly simultaneously, has formed a complete air cycle, makes the heat that installs intracavity power equipment produced can in time discharge outside the box to make the temperature of installation intracavity can keep at steady state, guaranteed power equipment's steady operation promptly. When the outside is rain and snow weather, dehumidify the air entering the installation cavity from the air inlet through the dehumidification mechanism, so that the content of water vapor in the air entering from the air inlet is reduced, and meanwhile, the dehumidification piece at the communication port is utilized to further dehumidify the air entering the installation groove from the air inlet cavity through the communication port, so that the content of water vapor in the air entering the installation cavity is greatly reduced. Compared with the dampproofing block terminal among the related art, this application is when sleet weather, through dehumidification mechanism to the air that gets into the installation intracavity from the air inlet, make the steam content in the air that gets into the air chamber reduce, utilize the dehumidification piece to get into the air of installation intracavity through the intercommunication mouth simultaneously and dehumidify further, make the content of steam in the air that gets into the installation intracavity greatly reduced, the air that gets into the installation intracavity is comparatively dry promptly, avoided because sleet weather leads to moist air to get into the installation intracavity and lead to the phenomenon that the electric power component wets, and the energy consumption is less, the temperature in the installation intracavity can keep stable, power equipment's steady operation has been guaranteed, power equipment's life has been prolonged.

Preferably, the number of the dehumidifying mechanisms is two, and the two dehumidifying mechanisms dehumidify the air entering the air inlet cavity from the two air inlets respectively.

Through adopting above-mentioned technical scheme, two sets of dehumidification mechanisms can dehumidify respectively the air that gets into the air inlet chamber from two air inlets to make the content of steam in the air that gets into the air inlet chamber reduce.

Preferably, the dehumidification mechanism comprises a U-shaped seat fixedly arranged in the box body, a dehumidification plate arranged in the U-shaped seat in a sliding mode and a driving assembly used for driving the dehumidification plate to slide relative to the U-shaped seat, the air inlet is positioned in the U-shaped seat, a dehumidification hole is formed in the dehumidification plate, when the dehumidification plate slides relative to the U-shaped seat to be covered on the air inlet, the dehumidification hole is arranged opposite to the air inlet, and a first drying agent is arranged in the dehumidification hole.

Through adopting above-mentioned technical scheme, during the dehumidification, slide through the relative U type seat of drive assembly drive dehumidification board, make the dehumidification board can slide to the lid in air inlet department, make the dehumidification hole on the dehumidification board just to the air inlet to make the moist air that gets into from the air inlet get into in the air inlet chamber after being dehumidified by first drier, and then make the moisture content in the moist air that gets into from the air inlet reduce.

Preferably, the driving assembly comprises a rotating shaft arranged on the top plate, two winding drums sleeved on the rotating shaft respectively, two connecting ropes wound on the two winding drums respectively and a driving piece used for driving the rotating shaft to rotate, the rotating shaft is arranged along the length direction of the top plate, the winding drums are symmetrically arranged at two ends of the rotating shaft, one ends of the connecting ropes are fixedly connected with the two winding drums respectively, and the other ends of the connecting ropes penetrate through the top plate and are fixedly connected with two dehumidification plates respectively.

Through adopting above-mentioned technical scheme, when dehumidifying, through driving piece drive pivot rotation, the reel that drives the pivot both ends takes place to rotate simultaneously to make the connecting rope on two reels be in the unwrapping wire state simultaneously, drive the relative U type seat of dehumidification board promptly and slide to cover and close in air inlet department, thereby make the first drier on the dehumidification board can dehumidify the humid air that gets into from the air inlet.

Preferably, the driving piece comprises a worm wheel fixedly sleeved on the rotating shaft, a worm used for being matched with the worm wheel in a meshing mode and a driving motor used for driving the worm to rotate.

Through adopting above-mentioned technical scheme, when dehumidifying, driving motor can output power steadily and make the worm rotate, drive the worm wheel and rotate, make the pivot take place to rotate to make the connecting rope drive the vertical decline of relative U type seat of dehumidification board, and then make the first drier on the dehumidification board can follow the air that the air inlet got into in the air chamber and dehumidify. Meanwhile, the self-locking characteristic between the worm wheel and the worm is utilized, so that the dehumidifying plate can dehumidify the air entering the air inlet cavity from the air inlet stably.

Preferably, the dehumidifying part comprises a dehumidifying frame fixedly arranged in the communication port and a second drying agent arranged on the dehumidifying frame.

Through adopting above-mentioned technical scheme, utilize the second drier can carry out further dehumidification to the air that gets into the installation cavity from the inlet chamber through the intercommunication mouth, make the content of steam in the air that gets into the installation cavity significantly reduce, and then avoided because of the condition emergence that moist air gets into the installation intracavity and leads to the power equipment to wet damage, prolonged power equipment's life.

Preferably, the heat radiation component comprises a heat radiation opening formed in the top plate, a heat radiation fan arranged at the heat radiation opening and an exhaust opening formed in the box cover, wherein the heat radiation opening is communicated with the mounting cavity and the exhaust cavity, the heat radiation fan is fixedly arranged in the heat radiation opening, the exhaust opening penetrates through the top of the box body, the exhaust opening is communicated with the exhaust cavity, and the exhaust opening and the heat radiation opening are oppositely arranged.

Through adopting above-mentioned technical scheme, when power equipment operates, through driving radiator fan rotation, collect the heat that power equipment produced and get into the exhaust chamber in the back outside the exhaust port discharge box under radiator fan's effect, external air gets into the installation intracavity by the intercommunication mouth after the inlet chamber constantly simultaneously, has formed the air cycle of a completion, makes the heat in the installation intracavity can in time be discharged outside the box to power equipment's steady operation has been guaranteed.

Preferably, a dust screen is arranged in the air inlet, and the dust screen is arranged along the circumferential direction of the air inlet.

Through adopting above-mentioned technical scheme, the dust cover can block external dust, makes external dust be difficult for entering to the installation intracavity from the air inlet.

In summary, the present application includes at least one of the following beneficial technical effects:

1. according to the method, when in rainy and snowy weather, the dehumidification mechanism is used for carrying out dehumidification treatment on the air entering the installation cavity from the air inlet, so that the moisture content in the air entering the air inlet cavity is reduced, meanwhile, the dehumidification piece is used for further dehumidifying the air entering the installation cavity from the air inlet cavity through the communication port, so that the moisture content in the air entering the installation cavity is greatly reduced, namely the air entering the installation cavity is drier, the phenomenon that the electric power element is wetted due to the fact that the humid air enters the installation cavity due to rainy and snowy weather is avoided, the energy consumption is small, the temperature in the installation cavity can be kept stable, the stable operation of the electric power equipment is guaranteed, and the service life of the electric power equipment is prolonged;

2. this application is when sleet weather, through driving motor, the pivot, the reel, connect the rope, cooperation between dehumidification board and the U type seat, make first drier on the dehumidification board can dehumidify the humid air that gets into the chamber from the air inlet, utilize the second drier to get into the air of installation intracavity through the intercommunication mouth simultaneously and dehumidify further, thereby make the air that gets into the installation intracavity keep dry, and then avoided the condition emergence that leads to power equipment to wet damage because of moist air gets into the installation intracavity, and do not influence the heat dissipation work in installation intracavity, the steady operation of power equipment has been guaranteed.

Drawings

FIG. 1 is a schematic view of the overall structure of the present embodiment;

FIG. 2 is a partial cross-sectional view of the present embodiment;

FIG. 3 is a schematic diagram showing the mating relationship between the connecting rope and the desiccant plate;

FIG. 4 is an enlarged view of portion A of FIG. 3;

fig. 5 is an enlarged view of a portion B in fig. 3.

Reference numerals illustrate: 10. a base; 11. a case; 12. a door; 13. a case cover; 14. a handle; 15. an observation port; 20. a top plate; 21. a side plate; 22. a mounting cavity; 23. an air inlet cavity; 24. an exhaust chamber; 30. an air inlet; 31. a dust screen; 32. a rain shield; 33. a U-shaped seat; 34. a dehumidifying plate; 341. dehumidifying holes; 342. a first dehumidifying box; 343. a first desiccant; 35. a vertical groove; 36. a slide block; 40. a rotating shaft; 41. a spool; 42. a connecting rope; 43. a support base; 44. a worm wheel; 45. a worm; 46. a driving motor; 47. a bearing seat; 48. a protective cover; 50. a communication port; 51. a dehumidifying member; 511. a second drying box; 512. a second desiccant; 60. a heat radiation port; 61. a heat radiation fan; 62. and an exhaust port.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-5.

An electric distribution box convenient for moisture prevention, referring to fig. 1 and 2, comprises a base 10, a box body 11 arranged on the base 10, a box door 12 rotatably arranged on the box body 11 and a box cover 13 fixedly arranged on the top of the box body 11. The base 10 is rectangular parallelepiped, the box 11 is hollow cuboid, the box door 12 is rotatably arranged on one side of the box 11, and the box door 12 is used for closing or opening the box 11. The door 12 is provided with a handle 14 for facilitating opening of the door 12. The box door 12 is also provided with an observation port 15 for observing the inside, and transparent glass is arranged at the observation port 15. The cover 13 is fixedly mounted on the top surface of the case 11, and the cover 13 is substantially in a herringbone configuration.

The box 11 is internally provided with a top plate 20 and two side plates 21, the left side and the right side of the top plate 20 are respectively fixedly connected with two opposite inner walls of the box 11, the two side plates 21 are symmetrically arranged on two sides of the bottom of the top plate 20, the top surfaces of the two side plates 21 are fixedly connected with the bottom side of the top plate 20, the bottom sides of the two side plates 21 are fixedly connected with the bottom surface of the box 11, the top plate 20 and the two side plates 21 are matched to form a mounting cavity 22 for mounting electric elements, the two side plates 21 are matched with two sides of the box 11 to form two air inlet cavities 23, and the top plate 20 is matched with the top of the box 11 to form an air exhaust cavity 24.

The air inlet 30 has all been seted up to the both sides of box 11, and two air inlet 30 symmetry set up in the both sides of box 11, and two air inlet openings all are located the middle part of box 11, and two air inlet 30 all communicate with air inlet cavity 23. In order to prevent dust from directly entering the air intake chamber 23 from the air intake port 30, a dust screen 31 is provided in the air intake port 30, the dust screen 31 is provided in the circumferential direction of the air intake port 30, and the dust screen 31 is fixedly installed in the air intake port 30.

In order to prevent rainwater or snow water from directly entering the air inlet cavity 23 from the air inlet 30 in rainy and snowy weather, two rain shields 32 are arranged on two sides of the box 11, two rain shields 32 are symmetrically arranged on two sides of the box 11, and the two rain shields 32 are respectively arranged above the two air inlets 30.

Referring to fig. 2 and 3, a dehumidifying mechanism for dehumidifying air that enters the air intake chamber 23 from the air intake port 30 is provided in the case 11. In the present embodiment, the number of the dehumidifying mechanisms is two, and the two sets of dehumidifying mechanisms are used for dehumidifying the air that enters the air intake chamber 23 from the two air inlets 30, respectively.

Specifically, referring to fig. 3 and 4, the dehumidifying mechanism includes a U-shaped seat 33 fixedly disposed in the case 11, a dehumidifying plate 34 slidably disposed in the U-shaped seat 33, and a driving assembly for driving the dehumidifying plate 34 to slidably move relative to the U-shaped seat 33. Wherein, U type seat 33 is fixed to be set up in the inner wall of box 11, and air inlet 30 is located U type seat 33, and perpendicular groove 35 has all been seted up to two relative inner walls of U type seat 33, and the both sides of dehumidification board 34 all are provided with be used for with perpendicular groove 35 sliding fit's slider 36. The dehumidifying plate 34 is provided with a dehumidifying hole 341, a first dehumidifying box 342 is disposed in the dehumidifying hole 341, and a first desiccant 343 is disposed in the first dehumidifying box 342, in this embodiment, the first desiccant 343 is calcium chloride, and in other embodiments, the first desiccant 343 may be other desiccants capable of adsorbing moisture. The left and right sides of the first dehumidifying box 342 are provided with through holes communicated with the inside of the first dehumidifying box 342, and when the dehumidifying plate 34 slides relative to the U-shaped seat 33 to cover the air inlet 30, the dehumidifying opening is arranged relative to the air inlet 30, so that air entering from the air inlet 30 can enter the first dehumidifying box 342 for dehumidifying.

The driving mechanism comprises a rotating shaft 40 rotatably arranged on the top plate 20, two winding drums 41 respectively sleeved on the rotating shaft 40, two connecting ropes 42 respectively wound on the two winding drums 41, and a driving piece for driving the rotating shaft 40 to rotate. The rotating shaft 40 is disposed along the length direction of the top plate 20, two supporting seats 43 for supporting the rotating shaft 40 are disposed on the top plate 20, the two supporting seats 43 are respectively located at two sides of the top plate 20, and two ends of the rotating shaft 40 are respectively connected to opposite sides of the two supporting seats 43 in a rotating manner. The two winding drums 41 are respectively and fixedly sleeved at two ends of the rotating shaft 40, the two winding drums 41 are oppositely arranged, one ends of the two connecting ropes 42 are respectively and fixedly connected with the two winding drums 41, and the other ends of the two connecting ropes 42 penetrate through the top plate 20 and enter the two accommodating cavities to be respectively and fixedly connected with the two dehumidifying plates 34.

Referring to fig. 3 and 4, the driving member includes a worm wheel 44 sleeved on the rotating shaft 40, a worm 45 for meshing engagement with the worm wheel 44, and a driving motor 46 for driving the worm 45 to rotate. The worm wheel 44 is fixedly sleeved on the rotating shaft 40, the worm 45 is arranged along the length direction perpendicular to the rotating shaft 40, the base 10 is provided with a bearing seat 47, the driving motor 46 is fixedly mounted on the top surface of the bearing seat 47, and an output shaft of the driving motor 46 is fixedly connected with the worm 45. In addition, the bearing seat 47 is further provided with a protective cover 48, and the worm wheel 44, the worm 45 and the driving motor 46 are all accommodated in the protective cover 48. When the external environment is rainy and snowy weather, more water vapor is mixed in the air entering the air inlet cavity 23 from the air inlet 30, at the moment, the worm 45 is driven to rotate by the driving motor 46, the worm 45 is driven to rotate, the rotating shaft 40 is driven to rotate, the two winding drums 41 are driven to rotate simultaneously, the connecting ropes 42 on the two winding drums 41 are in a paying-off state simultaneously, the dehumidifying plate 34 is driven to vertically descend relative to the U-shaped seat 33, the dehumidifying plate 34 is covered at the air inlet 30, and therefore the first drying agent 343 on the dehumidifying plate 34 can dehumidify the air entering the air inlet cavity 23 from the air inlet 30.

The two side plates 21 are provided with communication ports 50, the two communication ports 50 are located at the bottom sides of the side plates 21, and the two communication ports 50 are respectively used for communicating the two air inlet cavities 23 with the mounting cavity 22. A dehumidifying member 51 for further dehumidifying the air that enters the installation cavity 22 from the communication port 50 is provided at the communication port 50.

Specifically, referring to fig. 3 and 5, the dehumidifying member 51 includes a second dehumidifying case fixedly disposed in the communication port 50 and a second desiccant 512 disposed in the second dehumidifying case. Wherein, the through-hole that is used for with the inside intercommunication of second dehumidification box is all seted up to the both sides of second dehumidification box's surface. In this embodiment, the second desiccant 512 is activated carbon. When the dehumidifying device is used, air entering from the air inlet 30 enters the air inlet cavity 23 after being dehumidified through the dehumidifying plate 34, and at the moment, when the air enters the mounting cavity 22 through the communication port 50, the air is further dehumidified through the second drying box 511 and the second drying agent 512, so that water vapor mixed in the air entering the mounting cavity 22 is further absorbed, the content of the water vapor in the air entering the mounting cavity 22 is ensured, the phenomenon that a large amount of water vapor enters the mounting cavity 22 to cause the electric element to be damped is avoided, and the service life of the electric element is prolonged.

The heat dissipation assembly for discharging the heat in the installation cavity 22 to the outside of the box 11 is further arranged in the box 11, so that the situation that the electric elements are damaged due to the fact that a large amount of heat generated during the operation of the electric elements is accumulated in the installation cavity 22 is prevented.

Specifically, the heat dissipation assembly includes a heat dissipation opening 60 formed in the top plate 20, a heat dissipation fan 61 disposed at the heat dissipation opening 60, and an air outlet 62 formed in the case cover 13. The heat dissipation port 60 is located in the middle of the top plate 20, the heat dissipation port 60 is used for communicating the cavity with the air exhaust cavity 24, the heat dissipation fan 61 is fixedly installed in the heat dissipation port 60, the air exhaust port 62 penetrates through the top of the box 11, the air exhaust port 62 is communicated with the air exhaust cavity 24, and the circle centers of the air exhaust port 62 and the heat dissipation port 60 are located on the same vertical line.

The implementation principle of the application is as follows: when the distribution box normally operates, heat generated by the electric element in the installation cavity 22 enters the exhaust cavity 24 from the radiating hole under the action of the radiating fan 61 by driving the heat exhausting fan to rotate, and is discharged out of the box body 11 through the exhaust port 62, meanwhile, external air continuously enters the air inlet cavity 23 through the air inlet 30 and then enters the installation cavity 22 through the communication port 50, so that a complete air circulation is formed, the temperature in the installation cavity 22 can be kept in a stable state, and the stable operation of the electric element is ensured.

When the outside is in rainy and snowy weather, the worm 45 is driven by the driving motor 46 to rotate, the worm wheel 44 is driven to rotate, the rotating shaft 40 is driven to rotate, so that the two winding drums 41 on the rotating shaft 40 rotate simultaneously, the connecting ropes 42 on the two winding drums are in a paying-off state simultaneously, namely, the dehumidifying plate 34 is driven to vertically descend relative to the U-shaped seat 33, so that moist air entering from the air inlet 30 can enter the air inlet cavity 23 after being dehumidified by the first desiccant 343 on the dehumidifying plate 34, and meanwhile, the air entering the mounting cavity 22 from the air inlet cavity 23 through the communication port 50 is further dehumidified by the second dehumidifying box and the second desiccant 512, so that the content of water vapor in the air entering the mounting cavity 22 is low, the phenomenon that the electric element is wetted due to the fact that the air mixed with a large amount of water vapor enters the mounting cavity 22 is avoided, and the service life of the electric element is prolonged.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. The utility model provides a block terminal convenient to dampproofing, includes box (11), rotates and sets up chamber door (12) on box (11) and fixed case lid (13) that set up in the top of box (11), its characterized in that: the utility model discloses a dehumidifying device, which is characterized in that a top plate (20) and two side plates (21) are arranged in a box body (11), two opposite inner walls of the box body (11) are respectively and fixedly connected to two sides of the top plate (20), two side plates (21) are symmetrically arranged on two sides of the bottom of the top plate (20), the top plate (20) and the two side plates (21) are matched to form an installation cavity (22) for installing an electric element, two side plates (21) and two sides of the box body (11) are matched to form two air inlet cavities (23), the top plate (20) and the top of the box body (11) are matched to form an air outlet cavity (24), two air inlets (30) are respectively communicated with the two air inlet cavities (23), a dehumidifying mechanism for dehumidifying air entering the air inlet cavities (23) from the air inlets (30) is arranged in the box body (11), a communication port (50) is arranged on the side plate (21), the communication port (50) is communicated with the air inlet cavities (22) and the air inlet cavities (22) are communicated with the air inlet cavities (50), and a heat dissipation component for discharging heat in the installation cavity (22) to the outside of the box body (11) is further arranged in the box body (11).

2. A moisture-resistant electrical box as set forth in claim 1, wherein: the number of the dehumidifying mechanisms is two, and the two dehumidifying mechanisms dehumidify the air entering the air inlet cavity (23) from the two air inlets (30) respectively.

3. A moisture-resistant electrical box as set forth in claim 2 wherein: the dehumidification mechanism comprises a U-shaped seat (33) fixedly arranged in a box body (11), a dehumidification plate (34) arranged in the U-shaped seat (33) in a sliding mode and a driving assembly used for driving the dehumidification plate (34) to slide relative to the U-shaped seat (33), the air inlet (30) is positioned in the U-shaped seat (33), a dehumidification hole (341) is formed in the dehumidification plate (34), and when the dehumidification plate (34) slides relative to the U-shaped seat (33) to be covered on the air inlet (30), the dehumidification hole (341) and the air inlet (30) are arranged oppositely, and a first desiccant (343) is arranged in the dehumidification hole (341).

4. A moisture-resistant electrical box as set forth in claim 3, wherein: the driving assembly comprises a rotating shaft (40) arranged on the top plate (20), two winding drums (41) respectively sleeved on the rotating shaft (40), two connecting ropes (42) respectively wound on the two winding drums (41) and a driving piece for driving the rotating shaft (40) to rotate, the rotating shaft (40) is arranged along the length direction of the top plate (20), the two winding drums (41) are symmetrically arranged at two ends of the rotating shaft (40), one ends of the connecting ropes (42) are respectively and fixedly connected with the two winding drums (41), and the other ends of the two connecting ropes (42) penetrate through the top plate (20) and are respectively and fixedly connected with two dehumidification plates (34).

5. A moisture-resistant electrical box as set forth in claim 4 wherein: the driving piece comprises a worm wheel (44) fixedly sleeved on the rotating shaft (40), a worm (45) meshed with the worm wheel (44) and a driving motor (46) used for driving the worm (45) to rotate.

6. A moisture-resistant electrical box as set forth in claim 1, wherein: the dehumidifying piece (51) comprises a dehumidifying frame fixedly arranged in the communication port (50) and a second drying agent (512) arranged on the dehumidifying frame.

7. A moisture-resistant electrical box as set forth in claim 1, wherein: the heat radiation assembly comprises a heat radiation opening (60) formed in the top plate (20), a heat radiation fan (61) arranged at the heat radiation opening (60) and an exhaust opening (62) formed in the box cover (13), wherein the heat radiation opening (60) is communicated with the mounting cavity (22) and the exhaust cavity (24), the heat radiation fan (61) is fixedly arranged in the heat radiation opening (60), the exhaust opening (62) penetrates through the top of the box body (11), the exhaust opening (62) is communicated with the exhaust cavity (24), and the exhaust opening (62) and the heat radiation opening (60) are oppositely arranged.

8. A moisture-resistant electrical box as set forth in claim 1, wherein: a dust screen (31) is arranged in the air inlet (30), and the dust screen (31) is arranged along the circumferential direction of the air inlet (30).

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