A dehumidification and moisture-proof safety switch cabinet

Abstract

The present invention discloses a dehumidification and moisture-proof safety switch cabinet, comprising a cabinet body and an outer shell, wherein the cabinet body is arranged inside the outer shell, and the bottom surface of the cabinet body is welded and connected to the inner wall of the outer shell body through a first fixing column, a temperature sensor and an electromagnet are bolted to the inner wall of the top of the cabinet body, and an air inlet is provided on the bottom surface of the cabinet body, a first hole is provided on the top surface of the cabinet body, and the hole wall of the first hole is welded and connected to the outer wall of the first fixing cylinder, a second hole is provided on the top surface of the outer shell body, and the hole wall of the second hole is welded and connected to the outer circular wall of the second fixing cylinder, a fixing box is provided between the outer shell body and the top of the cabinet body, and a second sealing frame is welded and connected to the inner wall of the outer shell body. The dehumidification and moisture-proof safety switch cabinet realizes heat dissipation through air flow, and the entire air flow does not need to contact the outside world, so that the entry of external water vapor can be avoided, the internal moisture is prevented, and the safety of internal components during operation is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of switch cabinets, in particular to a dehumidification and moisture-proof safety switch cabinet. Background Art

[0002] When the switch cabinet is in operation, the internal components will generate a lot of heat. In order to prevent the components from running at high temperature for a long time, heat dissipation is required. The current heat dissipation method is air flow heat dissipation. The heat in the cabinet is discharged by a fan, and the outside air is drawn in. However, the outside air will be mixed with water vapor, which can easily cause the humidity inside the cabinet to increase. When the humidity is too high, there will be safety hazards when the components are running. It is not practical and cannot meet people's use needs. In view of the defects existing in the above existing technologies, it is necessary to further improve them to make them more practical so as to meet actual usage conditions. Summary of the invention

[0003] The object of the present invention is to provide a dehumidification and moisture-proof safety switch cabinet to solve the potential safety hazard problem mentioned in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a dehumidification and moisture-proof safety switch cabinet, comprising a cabinet body and an outer shell, wherein the cabinet body is arranged inside the outer shell, and the bottom surface of the cabinet body is welded to the inner wall of the outer shell body through a first fixing column, a temperature sensor and an electromagnet are fixed to the inner wall of the top end of the cabinet body by bolts, and an air inlet is provided on the bottom surface of the cabinet body, a first hole is provided on the top surface of the cabinet body, and the hole wall of the first hole is welded to the outer wall of the first fixing cylinder, a second hole is provided on the top surface of the outer shell body, and the hole wall of the second hole is welded to the outer circular wall of the second fixing cylinder, a fixing box is provided between the outer shell body and the top end of the cabinet body, and a second sealing frame is welded to the inner wall of the outer shell body;

[0005] A motor is bolted to the inner wall of the first fixing tube, and a sealing tube is sleeved on the first fixing tube. An air outlet is provided on the side wall of the first fixing tube opposite to the fixing box. A micro switch is bolted to the inner wall of the second fixing tube, and a top plate is welded to the outer wall of the second fixing tube.

[0006] The bottom wall of the sealing cylinder is welded with a vertical rod, and the bottom end of the vertical rod passes through the top wall of the cabinet and is welded with a magnet ring, the side wall of the sealing cylinder is welded with a first connecting rod, and the bottom end of the first connecting rod is welded with the top surface of the first sealing frame, the first sealing frame is sleeved on the cabinet, and the top surface of the first sealing frame is welded with a second connecting rod, the bottom end of the second connecting rod is welded with a fixing rod, and the top end of the fixing rod passes through the air inlet and is welded with a sealing sheet;

[0007] The micro switch is connected to the motor wires, and a centrifugal fan blade is fixed with a pin on the output shaft of the motor, the temperature sensor and the electromagnet are connected with wires, and the side of the electromagnet opposite to the magnet ring is a magnetic pole of the same name, a first through hole is provided on the side wall of the fixed box, and a second through hole is provided on the top surface of the fixed box, a silica gel desiccant is placed inside the fixed box, and a unidirectional moisture conductive layer is laid on the top surface of the silica gel desiccant, a third through hole is provided on the wall of the outer shell opposite to the second through hole, and the second through hole and the third through hole are interconnected.

[0008] Furthermore, the cabinet is sleeved with a sealing plate welded thereto, and the sealing plate is welded to the front wall of the outer shell. The outer shell is a hollow square structure with an open front, and the inner wall side length is greater than the outer wall side length of the cabinet.

[0009] Furthermore, the inner wall of the cabinet top surface extends vertically upward to form a groove, and the magnet ring is located in the groove. The magnet ring and the electromagnet are both in the shape of a circular ring, and the two have a coaxial center line.

[0010] Furthermore, two side walls of the outer shell extend vertically inward to form grooves, and the bottom walls of the grooves are penetrated by heat sinks welded thereto. The heat sinks are distributed at equal intervals in the grooves and are made of aluminum.

[0011] Furthermore, the inner diameter of the sealing cylinder is consistent with the outer diameter of the first fixed cylinder, and the outer diameter of the sealing cylinder is smaller than the inner diameter of the second fixed cylinder, and the second fixed cylinder, the first fixed cylinder and the sealing cylinder are coaxial.

[0012] Furthermore, a third hole is provided on the sealing cylinder for the fixed tube to pass through, and the outer wall of the fixed tube is seamlessly fitted with the third hole. The fixed tube is in a "7" shape, with its top end welded to the inner wall of the second fixed cylinder, and its bottom end welded to and communicated with the wall of the first fixed cylinder.

[0013] Furthermore, the first sealing frame and the second sealing frame are both rectangular frame structures, and a polytetrafluoroethylene gasket is bonded to the inner frame wall of the first sealing frame, and the first sealing frame is fitted to the outer wall of the cabinet through the polytetrafluoroethylene gasket, and the inner frame side length of the second sealing frame is smaller than the outer frame side length of the first sealing frame.

[0014] Furthermore, the diameter of the fixing rod is smaller than the inner diameter of the air inlet hole, and the inner diameter of the air inlet hole is smaller than the diameter of the sealing sheet. The sealing sheet, the fixing rod and the air inlet hole are coaxial, and a sealing ring is fixedly bonded to the bottom surface of the sealing sheet.

[0015] Furthermore, the fixing box is symmetrically arranged with respect to the first fixing cylinder, and the bottom surface of the first fixing cylinder is welded to the top wall of the cabinet through the second fixing column.

[0016] Furthermore, the one-way moisture conducting layer is interwoven with polypropylene yarn and polyester, and its side is fixedly bonded to the inner wall of the fixing box, and the cross section of the fixing box is consistent in shape and size with the one-way moisture conducting layer.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the dehumidification and moisture-proof safety switch cabinet is provided with an outer shell, the entire cabinet is located inside the outer shell, and a cavity is formed between the cabinet and the outer shell, the cavity can be injected with air in advance, and a first sealing frame and a second sealing frame are provided, the first sealing frame and the second sealing frame can separate the cavity into two parts, the upper and lower parts, when heat dissipation is performed, the hot air in the cabinet will be discharged into the upper cavity, and the cold air in the lower cavity will be sucked into the cabinet, so that heat dissipation is achieved through air flow, and the entire air flow does not need to contact the outside world, so that the entry of external water vapor can be avoided, the internal moisture can be prevented, and the safety of internal components during operation is ensured;

[0018] At the same time, a fixed box is provided, and a silica gel desiccant is provided inside the fixed box. When the air humidity in the cavity is high, the silica gel desiccant can dehumidify the water vapor in the air, thereby ensuring that when the air in the cavity and the air in the cabinet are exchanged, the air humidity in the cabinet will not increase, thereby further improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the internal formal structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the cabinet of the present invention;

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the outer shell of the present invention;

[0022] Figure 4 It is a schematic diagram of the formal longitudinal section structure of the first fixing cylinder and the sealing cylinder of the present invention;

[0023] Figure 5 It is a partial side view structural diagram of the cabinet and the outer shell of the present invention;

[0024] Figure 6 It is a schematic diagram of the top view of the cabinet and the fixing box of the present invention;

[0025] Figure 7 The present invention Figure 1 A schematic diagram of the enlarged structure of point A;

[0026] Figure 8 The present invention Figure 5 A schematic diagram of the enlarged structure of point B in the middle;

[0027] Fig. 9 It is the circuit diagram of the temperature sensor and the electromagnet of the present invention.

[0028] In the figure: 1. cabinet; 2. outer shell; 3. sealing plate; 4. first fixed cylinder; 5. second fixed cylinder; 6. temperature sensor; 7. electromagnet; 8. motor; 9. air outlet; 10. sealing cylinder; 11. vertical rod; 12. groove; 13. magnet ring; 14. first connecting rod; 15. first sealing frame; 16. second sealing frame; 17. second connecting rod; 18. air inlet; 19. fixing rod; 20. sealing sheet; 21. first fixing column; 22. micro switch; 23. fixing tube; 24. top plate; 25. fixing box; 26. second fixing column; 27. first through hole; 28. second through hole; 29. ​​silica gel desiccant; 30. one-way moisture conductive layer; 31. third through hole; 32. groove; 33. heat sink. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-9 The present invention provides a technical solution: a dehumidification and moisture-proof safety switch cabinet, comprising a cabinet 1 and an outer shell 2, the cabinet 1 is arranged inside the outer shell 2, and the bottom surface of the cabinet 1 is welded to the inner wall of the outer shell 2 through a first fixing column 21, the cabinet 1 is sleeved with a sealing plate 3 welded to it, and the sealing plate 3 is welded to the front wall of the outer shell 2, the outer shell 2 is a hollow square structure with an opening on the front, and the side length of its inner wall is greater than the side length of the outer wall of the cabinet 1, and there is a gap between the inner wall of the outer shell 2 and the outer wall of the cabinet 1, so that a cavity is formed, which is used The air is exchanged with the cabinet 1 to realize air flow and heat dissipation, and the heat dissipation process does not need to contact the outside world, avoiding the entry of water vapor. The sealing plate 3 is in the shape of a rectangular frame, so that the gap between the inner wall of the outer shell 2 and the cabinet 1 can be sealed, so that the cavity formed between the outer shell 2 and the cabinet 1 is in a closed state, and the structure is reasonable. The first fixing column 21 is cylindrical, and its top end is connected to the inner wall of the cabinet 1, and its bottom end is connected to the wall of the outer shell 2. In this way, it not only plays a role in fixing the cabinet 1, but also facilitates the underground line to pass into the cabinet 1, which is convenient to use;

[0031] The two side walls of the outer shell 2 extend vertically inward to form grooves 32, and the bottom wall of the groove 32 is penetrated by a heat sink 33 welded to it. The heat sink 33 is evenly spaced in the groove 32 and is made of aluminum. One end of the heat sink 33 is located in the groove 32, and the other end is located in the cavity formed between the outer shell 2 and the cabinet 1. In this way, when the air in the cabinet 1 is discharged into the cavity, the heat in the air will be conducted to the heat sink 33. The heat sink 33 conducts the heat to the outside air, thereby achieving heat dissipation of the air in the cavity, thereby improving the air flow and heat dissipation effect. At the same time, the design of the groove 32 ensures that when multiple switch cabinets are placed side by side, the heat sink 33 will not be squeezed, thereby avoiding the breakage of the heat sink 33.

[0032] The temperature sensor 6 and the electromagnet 7 are fixed with bolts on the inner wall of the top of the cabinet 1. The bottom wall of the sealing cylinder 10 is welded with a vertical rod 11, and the bottom end of the vertical rod 11 passes through the top wall of the cabinet 1 and is welded with a magnet ring 13. The temperature sensor 6 and the electromagnet 7 are connected by wires, and the opposite side of the electromagnet 7 and the magnet ring 13 are the same magnetic poles. The inner wall of the top of the cabinet 1 extends vertically upward to form a groove 12, and the magnet ring 13 is located in the groove 12. The magnet ring 13 and the electromagnet 7 are both annular, and the two have a common axis. When the internal temperature of the cabinet 1 rises to a certain temperature, After the thermistor in the temperature sensor 6 detects the temperature change, it will energize the electromagnet 7 to run. After the electromagnet 7 is energized, it generates magnetic force. The electromagnet 7 and the magnet ring 13 generate a repulsive force. The magnet ring 13 moves vertically upward in the groove 12 and drives the vertical rod 11 to move on the top wall of the cabinet 1. The vertical rod 11 can drive the sealing cylinder 10 to move vertically upward. When the sealing cylinder 10 moves, it can contact the micro switch 22 and press the button on the micro switch 22. At the same time, the air outlet 9 on the first fixed cylinder 4 can be exposed to facilitate the subsequent discharge of hot air.

[0033] A motor 8 is fixed with bolts on the inner wall of the first fixed cylinder 4, and a micro switch 22 is fixed with bolts on the inner wall of the second fixed cylinder 5. The micro switch 22 is connected to the motor 8 with electric wires, and a centrifugal fan blade is fixed with a pin on the output shaft of the motor 8. A third hole for the fixed tube 23 to penetrate is opened on the sealing cylinder 10, and the outer wall of the fixed tube 23 is seamlessly fitted with the third hole. The fixed tube 23 is in a "7" shape, and its top end is welded to the inner wall of the second fixed cylinder 5, and its bottom end is welded to the wall of the first fixed cylinder 4 and is connected. Since the micro switch 22 is connected to the motor 8, when the button of the micro switch 22 is pressed, the motor 8 can be connected to the circuit and start running, and the motor 8 can drive the axis of the centrifugal fan blade thereon to rotate, so that the hot air in the cabinet 1 can be blown upward The air is drawn out and discharged into the cavity between the outer shell 2 and the cabinet 1 through the air outlet 9. When the temperature in the cabinet 1 drops, the temperature sensor 6 controls the electromagnet 7 to cut off the power. In this way, the repulsive force is lost. The sealing cylinder 10 can move downward and reset through the vertical rod 11 under the action of gravity, so that the air outlet 9 can be blocked to prevent the hot air from flowing back. At the same time, the sealing cylinder 10 is separated from the micro switch 22, and the motor 8 is automatically powered off and stops running, so that the entire heat dissipation process can be automated to save energy. The setting of the fixed tube 23 is used for the wire connecting the micro switch 22 and the motor 8 to penetrate, forming a wire protection sleeve, so as to prevent the wire connecting the micro switch 22 and the motor 8 from being pulled and broken when the sealing cylinder 10 moves up and down, and the use effect is good;

[0034] The bottom surface of the cabinet 1 is provided with an air inlet 18, the top surface of the cabinet 1 is provided with a first hole, and the hole wall of the first hole is welded to the outer wall of the first fixed tube 4, the top surface of the outer shell 2 is provided with a second hole, and the hole wall of the second hole is welded to the outer wall of the second fixed tube 5, a fixing box 25 is arranged between the top of the outer shell 2 and the cabinet 1, and a second sealing frame 16 is welded to the inner wall of the outer shell 2, a sealing tube 10 is sleeved on the first fixed tube 4, and the side wall opposite to the fixing box 25 of the first fixed tube 4 is provided with a sealing tube 10 ... The air outlet 9 is provided, the outer wall of the second fixed cylinder 5 is welded to the top plate 24, the side wall of the sealing cylinder 10 is welded to the first connecting rod 14, and the bottom end of the first connecting rod 14 is welded to the top surface of the first sealing frame 15, the first sealing frame 15 is sleeved on the cabinet 1, and the top surface of the first sealing frame 15 is welded to the second connecting rod 17, the bottom end of the second connecting rod 17 is welded to the fixing rod 19, and the top end of the fixing rod 19 passes through the air inlet 18 and is welded to the sealing sheet 20, the sealing cylinder When 10 moves vertically upward, it can drive the first connecting rod 14 thereon to move synchronously, and the first connecting rod 14 can drive the first sealing frame 15 upward and fit with the second sealing frame 16, so that the first sealing frame 15 and the second sealing frame 16 can separate the cavity formed between the outer shell 2 and the cabinet 1 into two parts, upper and lower, so that the hot air discharged through the air outlet 9 will enter the cavity of the upper layer. At the same time, the first sealing frame 15 will drive the fixing rod 19 upward through the second connecting rod 17, and the fixing rod 19 will drive the sealing sheet 20 thereon to move synchronously, so that the air inlet hole 18 can be opened, so that when the centrifugal fan blades rotate, the air in the lower cavity can be drawn into the cabinet 1, thereby realizing air flow and heat dissipation. After the heat dissipation is completed, the sealing cylinder 10 will be reset, so that the first sealing frame 15 and the second sealing frame 16 will be separated again. At this time, the hot air in the upper cavity will diffuse into the lower cavity, thereby accelerating the cooling efficiency of the hot air and ensuring the effect of subsequent air flow and heat dissipation.

[0035] The inner diameter of the sealing cylinder 10 is consistent with the outer diameter of the first fixed cylinder 4, and the outer diameter of the sealing cylinder 10 is smaller than the inner diameter of the second fixed cylinder 5. The second fixed cylinder 5, the first fixed cylinder 4 and the sealing cylinder 10 are coaxial. The dimensions of the sealing cylinder 10, the first fixed cylinder 4 and the second fixed cylinder 5 are designed so that when the sealing cylinder 10 is sleeved on the first fixed cylinder 4, the air outlet 9 can be blocked and sealed to prevent the air in the cabinet 1 from flowing out. At the same time, when the sealing cylinder 10 moves upward, it can move into the second fixed cylinder 5 and press the micro switch 22 in the second fixed cylinder 5.

[0036] The first sealing frame 15 and the second sealing frame 16 are both rectangular frame structures, and a polytetrafluoroethylene gasket is bonded to the inner frame wall of the first sealing frame 15, and the first sealing frame 15 is fitted with the outer wall of the cabinet 1 through the polytetrafluoroethylene gasket. The inner frame side length of the second sealing frame 16 is smaller than the outer frame side length of the first sealing frame 15. The first sealing frame 15 can move vertically up and down along the outer wall of the cabinet 1, and when moving, it is in a sealed state with the outer wall of the cabinet 1, so that when the first sealing frame 15 and the second sealing frame 16 are fitted, the cavity formed between the outer shell 2 and the cabinet 1 can be divided into two upper and lower parts, and the structure is reasonable;

[0037] The diameter of the fixing rod 19 is smaller than the inner diameter of the air inlet hole 18, and the inner diameter of the air inlet hole 18 is smaller than the diameter of the sealing sheet 20. The sealing sheet 20, the fixing rod 19 and the air inlet hole 18 are coaxial, and a sealing ring is fixedly bonded to the bottom surface of the sealing sheet 20. The size of the fixing rod 19 and the air inlet hole 18 is designed so that the fixing rod 19 can move smoothly in the air inlet hole 18, and after the fixing rod 19 drives the sealing sheet 20 upward, air can flow in the air inlet hole 18. When the heat dissipation is completed, the sealing cylinder 10 will be reset, and the fixing rod 19 will be driven to reset through the first connecting rod 14, the first sealing frame 15 and the second connecting rod 17. The fixing rod 19 drives the sealing sheet 20 to reset, and the sealing sheet 20 can cover the air inlet hole 18, so that the cabinet 1 is in a closed environment, ensuring that the working environment of the components inside the cabinet 1 is stable and highly safe.

[0038] A first through hole 27 is provided on the side wall of the fixing box 25, and a second through hole 28 is provided on the top surface of the fixing box 25. A silica gel desiccant 29 is placed inside the fixing box 25, and a unidirectional moisture-conducting layer 30 is laid on the top surface of the silica gel desiccant 29. A third through hole 31 is provided on the wall of the outer shell 2 opposite to the second through hole 28, and the second through hole 28 and the third through hole 31 are interconnected. The fixing box 25 is symmetrically arranged about the first fixing cylinder 4, and the bottom surface of the first fixing cylinder 4 is welded and connected to the top wall of the cabinet 1 through the second fixing column 26. The unidirectional moisture-conducting layer 30 is interwoven with polypropylene yarn and polyester, and its side is fixedly bonded to the inner wall of the fixing box 25, and the cross-section of the fixing box 25 is consistent in shape and size with the unidirectional moisture-conducting layer 30. When the air humidity in the cavity formed between the outer shell 2 and the cabinet 1 is high, when the air can contact with the silica gel desiccant 29 in the fixing box 25 through the first through hole 27, the silica gel desiccant 29 can absorb water vapor in the air, thereby ensuring the humidity in the cavity. The air humidity will not be too high, so that when the air in the cavity exchanges and flows with the air in the cabinet 1, the humidity in the cabinet 1 will not rise. At the same time, when the moisture absorbed in the silica gel desiccant 29 reaches a certain amount, it will be conducted to the unidirectional moisture conducting layer 30. The unidirectional moisture conducting layer 30 is interwoven with polypropylene yarn and polyester. Through the water-repellent effect of polypropylene, moisture can be introduced from the polypropylene surface to the polyester surface. Combined with the quick-drying characteristics of polyester, moisture can be guided to the outside through the second through hole 28 and the third through hole 31. When the outside air enters the fixed box 25 through the second through hole 28 and the third through hole 31, due to the water-repellent effect of polypropylene, moisture in the air will not enter from the polyester surface to the polypropylene surface, thus achieving unidirectional moisture conduction. At the same time, when the hot air in the cabinet 1 is discharged through the air outlet 9, it will pass through the fixed box 25 through the first through hole 27, so that the silica gel desiccant 29 can be dried, and the silica gel desiccant 29 can be reused many times.

[0039] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention; the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dehumidification and moisture-proof safety switch cabinet, comprising a cabinet body (1) and an outer shell (2), characterized in that: The cabinet (1) is arranged inside the outer shell (2), and the bottom surface of the cabinet (1) is welded to the inner wall of the outer shell (2) through a first fixing column (21); a temperature sensor (6) and an electromagnet (7) are bolted to the inner wall of the top end of the cabinet (1); an air inlet (18) is provided on the bottom surface of the cabinet (1); a first hole is provided on the top surface of the cabinet (1), and the hole wall of the first hole is welded to the outer wall of the first fixing tube (4); a second hole is provided on the top surface of the outer shell (2), and the hole wall of the second hole is welded to the outer circular wall of the second fixing tube (5); a fixing box (25) is provided between the outer shell (2) and the top end of the cabinet (1), and a second sealing frame (16) is welded to the inner wall of the outer shell (2); A motor (8) is bolted to the inner wall of the first fixed cylinder (4), and a sealing cylinder (10) is sleeved on the first fixed cylinder (4); an air outlet (9) is provided on the side wall of the first fixed cylinder (4) opposite to the fixed box (25); a micro switch (22) is bolted to the inner wall of the second fixed cylinder (5), and a top plate (24) is welded to the outer wall of the second fixed cylinder (5); The bottom wall of the sealing cylinder (10) is welded to a vertical rod (11), and the bottom end of the vertical rod (11) passes through the top wall of the cabinet (1) and is welded to a magnet ring (13); the side wall of the sealing cylinder (10) is welded to a first connecting rod (14), and the bottom end of the first connecting rod (14) is welded to the top surface of a first sealing frame (15); the first sealing frame (15) is sleeved on the cabinet (1), and the top surface of the first sealing frame (15) is welded to a second connecting rod (17); the bottom end of the second connecting rod (17) is welded to a fixing rod (19), and the top end of the fixing rod (19) passes through the air inlet (18) and is welded to a sealing sheet (20); The micro switch (22) is connected to the motor (8) by wires, and a centrifugal fan blade is fixed on the output shaft of the motor (8) by a pin, the temperature sensor (6) and the electromagnet (7) are connected by wires, and the side of the electromagnet (7) opposite to the magnet ring (13) is a magnetic pole of the same name, a first through hole (27) is provided on the side wall of the fixing box (25), and a second through hole (28) is provided on the top surface of the fixing box (25), a silica gel desiccant (29) is placed inside the fixing box (25), and a unidirectional moisture conductive layer (30) is laid on the top surface of the silica gel desiccant (29), and a third through hole (31) is provided on the wall of the outer shell (2) opposite to the second through hole (28), and the second through hole (28) and the third through hole (31) are interconnected.

2. A dehumidification and moisture-proof safety switch cabinet according to claim 1, characterized in that: The cabinet (1) is sleeved with a sealing plate (3) welded thereto, and the sealing plate (3) is welded to the front wall of the outer shell (2); the outer shell (2) is a hollow square structure with an open front, and the side length of its inner wall is greater than the side length of the outer wall of the cabinet (1).

3. The dehumidification and moisture-proof safety switch cabinet according to claim 1, characterized in that: The inner wall of the top surface of the cabinet (1) extends vertically upward to form a groove (12), and the magnet ring (13) is located in the groove (12). The magnet ring (13) and the electromagnet (7) are both in the shape of a ring and share a common axis.

4. The dehumidification and moisture-proof safety switch cabinet according to claim 1, characterized in that: The two side walls of the outer shell (2) extend vertically inward to form grooves (32), and the bottom wall of the groove (32) is penetrated by a heat sink (33) welded to the groove. The heat sink (33) is distributed at equal intervals in the groove (32) and is made of aluminum.

5. The dehumidification and moisture-proof safety switch cabinet according to claim 1, characterized in that: The inner diameter of the sealing cylinder (10) is consistent with the outer diameter of the first fixed cylinder (4), and the outer diameter of the sealing cylinder (10) is smaller than the inner diameter of the second fixed cylinder (5). The second fixed cylinder (5), the first fixed cylinder (4) and the sealing cylinder (10) are coaxial.

6. The dehumidification and moisture-proof safety switch cabinet according to claim 5, characterized in that: The sealing cylinder (10) is provided with a third hole for the fixing tube (23) to penetrate, and the outer wall of the fixing tube (23) is seamlessly fitted with the third hole. The fixing tube (23) is in a "7"-shaped structure, with its top end welded to the inner wall of the second fixing cylinder (5), and its bottom end welded to and communicated with the wall of the first fixing cylinder (4).

7. The dehumidification and moisture-proof safety switch cabinet according to claim 1, characterized in that: The first sealing frame (15) and the second sealing frame (16) are both rectangular frame structures, and a polytetrafluoroethylene gasket is bonded to the inner frame wall of the first sealing frame (15), and the first sealing frame (15) is fitted to the outer wall of the cabinet (1) via the polytetrafluoroethylene gasket, and the inner frame side length of the second sealing frame (16) is smaller than the outer frame side length of the first sealing frame (15).

8. The dehumidification and moisture-proof safety switch cabinet according to claim 1, characterized in that: The diameter of the fixing rod (19) is smaller than the inner diameter of the air inlet hole (18), and the inner diameter of the air inlet hole (18) is smaller than the diameter of the sealing sheet (20). The sealing sheet (20), the fixing rod (19) and the air inlet hole (18) are coaxial, and a sealing ring is fixedly bonded to the bottom surface of the sealing sheet (20).

9. The dehumidification and moisture-proof safety switch cabinet according to claim 1, characterized in that: The fixing box (25) is symmetrically arranged with respect to the first fixing cylinder (4), and the bottom surface of the first fixing cylinder (4) is welded to the top wall of the cabinet (1) via a second fixing column (26).

10. The dehumidification and moisture-proof safety switch cabinet according to claim 1, characterized in that: The one-way moisture conducting layer (30) is made of polypropylene yarn and polyester interwoven, and its side edge is fixedly bonded to the inner wall of the fixing box (25), and the cross section of the fixing box (25) is consistent in shape and size with the one-way moisture conducting layer (30).

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