A moisture-proof device for electrical equipment

Abstract

The present invention discloses a moisture-proof device for electrical equipment, which relates to the technical field of electrical equipment; a hollow storage board is arranged inside the cabinet body, a first-stage air window and a second-stage air window at different heights are respectively opened on both sides of the cabinet body, and a first-stage fan is arranged on one side of the storage board close to the dehumidification structure; the dehumidification structure includes an inverted V-shaped guide plate, a telescopic rod is installed in the middle of the cabinet body, the telescopic rod is connected to the guide plate, and the guide plate is slidably installed inside the cabinet body; a semiconductor refrigeration sheet is installed on one side of the guide plate away from the first-stage fan; through grooves are opened on both sides of the cabinet body, both ends of the guide plate pass through the through grooves, and one end of the guide plate located outside the cabinet body is connected to a guide groove, and one end of the guide groove is connected to a water outlet groove, and the water outlet groove fits the surface of the cabinet body. This device can significantly improve the dehumidification efficiency, and can dehumidify automatically for a long time without causing the internal temperature to rise, and is safe and convenient to use.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and specifically to a moisture-proof device for electrical equipment. Background Art

[0002] Electrical equipment is a general term for devices such as generators, transformers, power lines, and circuit breakers in the power system. The important role played by electricity in our life and production cannot be ignored. It brings us great convenience and becomes an important energy source in our production and life. The most crucial factor for the normal operation and transmission of electricity in a power plant is electrical equipment. In order to ensure the stable operation of electrical equipment and avoid posing a safety threat to the surrounding people in life or at work, there are various specification requirements for the installation of electrical equipment, such as electrical insulation, electrical safety distance, safe current-carrying capacity, and obvious, clear, and unified markers.

[0003] Electrical equipment is generally installed in a dedicated electrical cabinet or distribution cabinet. In addition to common indoor places such as substations or distribution rooms, some distribution cabinets are also directly installed in outdoor environments. Distribution cabinets installed outdoors have higher requirements for performance and need to have effects such as rainproof and moisture-proof. Distribution cabinets are divided into power distribution cabinets, lighting distribution cabinets, and metering cabinets, and are the end-level equipment of the power distribution system. A distribution cabinet is a general term for a motor control center. Distribution cabinets are used in occasions where the load is relatively scattered and the number of circuits is small; motor control centers are used in occasions where the load is concentrated and the number of circuits is large.

[0004] During the use of electrical equipment, heat and noise will be continuously generated. Therefore, distribution cabinets and substations also need to have good heat dissipation and noise reduction effects. In order to ensure good heat dissipation effects, existing distribution cabinets generally adopt the form of a fan combined with air vents to dissipate heat using air flow. This kind of distribution cabinet exchanges air with the outside world frequently, and in a humid environment, it will also cause the humidity inside the distribution cabinet to be too high, increasing the risks of equipment corrosion and short circuits. Therefore, it is necessary to improve the moisture-proof performance of the distribution cabinet. The common moisture-proof method for distribution cabinets is to set moisture-absorbing materials inside the distribution cabinet. This method is inconvenient to use because the moisture-absorbing materials need to be replaced frequently. There are also some distribution cabinets that use the method of internal heating to continuously reduce the humidity, but this type of equipment will cause the temperature inside the distribution cabinet to be too high, reducing safety. Summary of the Invention

[0005] The purpose of the present invention is to provide a moisture-proof device for electrical equipment to solve the problems raised in the above background art. A device that does not require manual maintenance and can perform long-term automatic moisture-proofing is proposed, while not affecting the normal use of internal equipment.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A moisture-proof device for an electrical equipment, comprising a cabinet body; a hollowed-out placement board is arranged inside the cabinet body, first-level air windows and second-level air windows at different heights are respectively opened on both sides of the cabinet body, a dehumidification structure is arranged inside the cabinet body, and a first-level fan is arranged on one side of the placement board close to the dehumidification structure; the dehumidification structure comprises an inverted V-shaped flow guide plate, a telescopic rod is installed in the middle of the cabinet body, the telescopic rod is connected to the flow guide plate, and the flow guide plate is slidably installed inside the cabinet body; a semiconductor refrigeration sheet is installed on one side of the flow guide plate away from the first-level fan; through grooves are opened on both sides of the cabinet body, both ends of the flow guide plate pass through the through grooves, one end of the flow guide plate located outside the cabinet body is connected to a flow guide groove, one end of the flow guide groove is connected to a water outlet groove, and the water outlet groove fits the surface of the cabinet body.

[0008] As a further scheme of the present invention: vertical support rods are respectively installed on both sides of the flow guide plate, the support rods are attached to the inner wall of the cabinet body, and the support rods pass through the gap between the cabinet body and the placement board.

[0009] As a further scheme of the present invention: a first-level baffle and a second-level baffle corresponding to the first-level air window and the second-level air window are respectively installed on the support rods, a limiting frame is arranged on the inner wall of the cabinet body, and the first-level baffle passes through the limiting frame.

[0010] As a further scheme of the present invention: a water inlet is opened on one side of the flow guide groove that fits the cabinet body, the flow guide groove is inclined towards the water outlet groove, and a water outlet pipe is connected to the water outlet groove.

[0011] As a further scheme of the present invention: the height of the placement board and the first-level fan is between the first-level air window and the second-level air window, the height of the second-level air window is between the first-level fan and the through groove, and the width of the through groove is greater than the widths of the first-level air window and the second-level air window.

[0012] As a further scheme of the present invention: a grid plate is arranged on one side of the cabinet body close to the semiconductor refrigeration sheet, a heat dissipation rack is installed inside the cabinet body between the semiconductor refrigeration sheet and the grid plate, and a second-level fan is installed on the heat dissipation rack.

[0013] As a further scheme of the present invention: track grooves distributed in a figure-eight shape are arranged at both ends of the cabinet body, a water scraping plate is connected between the track grooves, the water scraping plate is located on the surface of the flow guide plate, and the slope of the track groove is greater than the slopes on both sides of the flow guide plate.

[0014] As a further scheme of the present invention: a cabinet door is installed on one side of the cabinet body, a plurality of support feet are installed outside the cabinet body, an inverted V-shaped rain shelter is installed on the cabinet body, and a humidity sensor is arranged inside the cabinet body.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] With the above-mentioned moisture-proof device for electrical equipment, the cabinet in this device is used to place electrical equipment. The electrical equipment is placed on the placement board inside the cabinet. At the same time, an inverted V-shaped diversion plate is arranged below the placement board, and a semiconductor refrigeration sheet is fitted and installed at the bottom of the diversion plate. When dehumidification is required, the telescopic rod is used to lift the diversion plate upward to seal the primary air window and the secondary air window. At the same time, the diversion plate also seals the area at the through groove, so that the equipment is located in a closed space. The semiconductor refrigeration sheet cools down to a range close to zero degree Celsius, and the primary fan continuously blows the internal air cyclically to the diversion plate. The water vapor condenses into water droplets on the diversion plate. After dehumidification is completed, the diversion plate is lowered, and the water droplets gradually enter the water outlet groove from the diversion grooves on both sides and are finally discharged.

[0017] With the above-mentioned moisture-proof device for electrical equipment, compared with the traditional moisture removal by absorbent materials and heating moisture removal, this device can significantly improve the efficiency of moisture removal, and will not cause the electrical equipment to be in a high-temperature environment. On the contrary, during the dehumidification process of this device, it can effectively reduce the temperature inside the cabinet while dehumidifying, improve the working environment of the electrical equipment, and enhance the safety of equipment use. Since the space inside the cabinet is closed during the initial process of this device, it can ensure that the dehumidification mainly focuses on the gas inside the cabinet without rapid gas exchange with the outside. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the moisture-proof device for electrical equipment.

[0019] Figure 2 It is a schematic structural diagram of the cross-section of the cabinet in the moisture-proof device for electrical equipment.

[0020] Figure 3 It is a schematic structural diagram of the connection between the dehumidification structure and the bottom of the cabinet in the moisture-proof device for electrical equipment.

[0021] Figure 4 It is a schematic structural diagram of the cross-section of the bottom of the cabinet in the moisture-proof device for electrical equipment.

[0022] Figure 5 It is a schematic structural diagram of the dehumidification structure in the moisture-proof device for electrical equipment.

[0023] In the figure: 1. Cabinet; 11. Cabinet door; 12. Rain-proof eaves; 13. Primary air window; 14. Support feet; 15. Secondary air window; 16. Limit frame; 17. Through groove; 18. Grid plate; 19. Track groove; 2. Dehumidification structure; 21. Diversion plate; 22. Semiconductor refrigeration sheet; 23. Diversion groove; 231. Water inlet; 24. Water outlet groove; 241. Water outlet pipe; 25. Telescopic rod; 26. Primary baffle; 27. Support rod; 28. Secondary baffle; 3. Placement board; 4. Primary fan; 5. Heat dissipation rack; 51. Secondary fan; 6. Wiper; 7. Humidity sensor. DETAILED DESCRIPTION

[0024] 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figures 1 to 5 In an embodiment of the present invention, a moisture-proof device for electrical equipment includes a cabinet 1; a hollow storage plate 3 is arranged inside the cabinet 1, and a first-level air window 13 and a second-level air window 15 located at different heights are respectively opened on both sides of the cabinet 1; a dehumidification structure 2 is arranged inside the cabinet 1, and a first-level fan 4 is arranged on a side of the storage plate 3 close to the dehumidification structure 2; the dehumidification structure 2 includes an inverted V-shaped guide plate 21, a telescopic rod 25 is installed in the middle of the cabinet 1, the telescopic rod 25 is connected to the guide plate 21, and the guide plate 21 is slidably installed inside the cabinet 1; a semiconductor refrigeration plate 22 is installed on a side of the guide plate 21 away from the first-level fan 4; through grooves 17 are opened on both sides of the cabinet 1, and both ends of the guide plate 21 pass through the through grooves 17, and one end of the guide plate 21 located outside the cabinet 1 is connected to the guide groove 23, and one end of the guide groove 23 is connected to the water outlet 24, and the water outlet 24 is attached to the surface of the cabinet 1.

[0026] The device is provided with a storage plate 3 in the cabinet 1 for placing electrical equipment. The first-level fan 4 located below the storage plate 3 can be turned on for a long time in daily use, and air is drawn inward from the first-level air window 13 and then discharged from the second-level air window 15, so that fresh air is used to take away the heat generated by the electrical equipment in the working state, thereby achieving a heat dissipation effect.

[0027] When the humidity inside the cabinet body 1 is too high, the telescopic rod 25 is used to raise the deflector 21 located below the first-stage fan 4, so that the edge of the deflector 21 abuts against the upper wall of the through slots 17 on both sides of the cabinet body 1. At this time, the through slots 17 no longer have the function of exhausting air. At the same time, the semiconductor refrigeration sheet 22 below the deflector 21 is turned on, and the surface temperature of the deflector 21 will rapidly decrease until it approaches zero. When the deflector 21 is raised, it will also close the first-stage air window 13 and the second-stage air window 15, that is, the area for placing electrical equipment inside the cabinet body 1 becomes a completely enclosed space. At this time, the first-stage fan 4 continues to blow downward, forming a circulating flow inside the cabinet body 1. The gas hits the deflector 21, and after contacting the low-temperature deflector 21, the originally gaseous water vapor quickly condenses into water droplets and remains on the deflector 21, thus achieving the effect of rapid dehumidification. After the dehumidification work is completed, the deflector 21 is lowered again, so that the water droplets condensed on the surface of the deflector 21 can pass through the through slot 17 along the inclined surface of the deflector 21, enter the diversion groove 23, and finally be discharged from the water outlet groove 24.

[0028] The telescopic rod 25 used in this device can be a hydraulic rod or a cylinder, etc., or a mechanical structure with a lifting effect, such as a scissor mechanism or a cam guide groove structure, etc. This device can dehumidify and drain water automatically, and the whole process does not require manual handling or regular maintenance, and is more suitable for long-term use. This device uses low-temperature dehumidification, which can quickly and efficiently remove the excess moisture inside the cabinet body 1, and will not cause the temperature inside the cabinet body 1 to rise. Instead, it can further reduce the temperature inside the cabinet body 1 during the dehumidification process. In an environment where dehumidification is not required, this device can also be used to enhance the heat dissipation effect, significantly improving the protection effect on electrical equipment and enhancing the safety of long-term use of electrical equipment.

[0029] As another embodiment of the present invention, please refer to Figure 2 and Figure 5 , vertical support rods 27 are respectively installed on both sides of the deflector 21. The support rods 27 are attached to the inner wall of the cabinet body 1, and the support rods 27 pass through the gap between the cabinet body 1 and the storage board 3. Since the support rods 27 are attached to the inner wall of the cabinet body 1, it does not affect the normal placement of electrical equipment. The support rods 27 are used to convert the movement of the deflector 21 into the control of the first-stage air window 13 and the second-stage air window 15.

[0030] Please refer to Figure 2 and Figure 5, a first baffle 26 and a second baffle 28 corresponding to the first air window 13 and the second air window 15 are respectively installed on the support rod 27. A limiting frame 16 is arranged on the inner wall of the cabinet body 1, and the first baffle 26 passes through the limiting frame 16. The first baffle 26 and the second baffle 28 are lifted synchronously when the deflector 21 is lifted, blocking inside the first air window 13 and the second air window 15 to form a relatively enclosed environment inside the cabinet body 1. After the deflector 21 is lowered, they are lowered accordingly, no longer blocking the first air window 13 and the second air window 15, and restoring normal gas flow. The limiting frame 16 is used to limit the position of the first baffle 26 at a high place, and at the same time also limits the position of the support rod 27, so that the first baffle 26 can fully fit the inner wall of the cabinet body 1, avoiding the situation that the first baffle 26 cannot effectively block the first air window 13 due to the deflection of the material itself.

[0031] Please refer to Figures 3 to 5 , a water inlet 231 is opened on one side of the flow guide groove 23 that fits the cabinet body 1. The flow guide groove 23 is inclined towards the water outlet groove 24, and a water outlet pipe 241 is connected to the water outlet groove 24. The side of the flow guide groove 23 is open. The water accumulated on the deflector 21 converges into the flow guide groove 23 along the water inlet 231, and converges into the water outlet groove 24 along the slope inside the flow guide groove 23, and finally is discharged from the water outlet pipe 241. The water outlet pipe 241 can be connected to a pipe leading to a specified drainage system, or can be directly drained outside the cabinet body 1, and can be adjusted according to needs.

[0032] Please refer to Figure 2 , the heights of the storage board 3 and the first-level fan 4 are between the first air window 13 and the second air window 15, the height of the second air window 15 is between the first-level fan 4 and the through groove 17, and the width of the through groove 17 is greater than the widths of the first air window 13 and the second air window 15. The first-level fan 4 sucks air from the first air window 13 and discharges it from the second air window 15. The width of the through groove 17 is the height at which the deflector 21 can move up and down. Therefore, it is necessary to make the width of the through groove 17 greater than the widths of the first air window 13 and the second air window 15.

[0033] Please refer to Figures 2 to 4 , a grille plate 18 is arranged on one side of the cabinet body 1 close to the semiconductor refrigeration sheet 22. A heat dissipation rack 5 located between the semiconductor refrigeration sheet 22 and the grille plate 18 is installed inside the cabinet body 1, and a second-level fan 51 is installed on the heat dissipation rack 5. The grille plate 18 is located at the bottom. The second-level fan 51 on the heat dissipation rack 5 is used to dissipate heat for the semiconductor refrigeration sheet 22. The semiconductor refrigeration sheet 22 will form a high temperature on the other side during use, so separate heat dissipation is required.

[0034] Please refer to Figures 2 to 4, track grooves 19 distributed in a V shape are provided at both ends of the cabinet body 1. A wiper 6 is connected between the track grooves 19. The wiper 6 is located on the surface of the flow guide plate 21. The slope of the track groove 19 is greater than the slopes on both sides of the flow guide plate 21. The track grooves 19 limit the movement track of the wiper 6. Since the slope of the track groove 19 of the wiper 6 is greater than the slope of one side of the flow guide plate 21, when the flow guide plate 21 is lifted, the wiper 6 that is lifted passively will gradually converge towards the middle under the restriction of its own track groove 19 until it is located at the top of the flow guide plate 21. After dehumidification is completed, the flow guide plate 21 moves downward, and the wiper 6 moves downward along the flow guide plate 21 under the action of its own weight and continuously moves outward, discharging the condensed water droplets outward and converging into a water flow to separate from the flow guide plate 21 and be discharged. The connection method of the wiper 6 used in this device is not restrictive. In addition to using gravity to cooperate with the movement, a drive can also be directly provided on the surface of the flow guide plate 21 to further improve the water scraping effect. And this device only requires the wiper 6 to be able to scrape off most of the water. During the process of the primary fan 4 continuing to extract air for heat dissipation, the remaining water stains will also be re-evaporated by the hot air and discharged from the secondary air window 15.

[0035] Please refer to Figure 1 and Figure 2 , a cabinet door 11 is installed on one side of the cabinet body 1. A plurality of support feet 14 are installed outside the cabinet body 1. An inverted V-shaped rain shield 12 is installed on the cabinet body 1. A humidity sensor 7 is arranged inside the cabinet body 1. The cabinet door 11 can be opened for installing electrical equipment. In addition to the cabinet door 11, pipelines for threading should also be provided on the cabinet body 1. However, due to different installation methods of different devices, the positions of the pipelines are different, so no restrictive description is made. The rain shield 12 is an optional improvement structure. The rain shield 12 can be selected for use outdoors to enhance the rainproof effect. The humidity sensor is used to monitor the humidity inside the cabinet body 1 to determine whether the dehumidification structure 2 needs to be turned on.

[0036] The working principle of the present invention is:

[0037] This device is provided with a storage board 3 inside the cabinet body 1 for placing electrical equipment. A primary fan 4 is arranged below the storage board 3, and a primary air window 13 is arranged above the cabinet body 1, and a secondary air window 15 is arranged below. The continuous circulation of air flow is realized through the primary fan 4 to assist in the heat dissipation of electrical equipment. Through slots 17 are opened on both sides of the bottom of the cabinet body 1. A reverse V-shaped guide plate 21 is arranged inside the cabinet body 1. A semiconductor refrigeration sheet 22 is fitted and installed at the bottom of the guide plate 21. When dehumidification is required, the guide plate 21 is lifted to close the through slots 17. At the same time, the primary air window 13 and the secondary air window 15 are also closed. The air extraction of the primary fan 4 enables the gas to circulate inside the cabinet body 1, and the gas continuously impacts on the low-temperature guide plate 21, and water droplets condense on the guide plate 21. Subsequently, the water droplets are discharged, and the humidity inside the cabinet body 1 can be significantly reduced, achieving the effect of moisture-proof and dehumidification.

[0038] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A moisture-proof device for electrical equipment, comprising a cabinet; characterized in that: A hollow storage plate is arranged inside the cabinet, and primary air windows and secondary air windows at different heights are respectively arranged on both sides of the cabinet. A dehumidification structure is arranged inside the cabinet, and a primary fan is arranged on a side of the storage plate close to the dehumidification structure; the dehumidification structure includes an inverted V-shaped guide plate, a telescopic rod is installed in the middle of the cabinet, the telescopic rod is connected to the guide plate, and the guide plate is slidably installed inside the cabinet; a semiconductor refrigeration sheet is installed on a side of the guide plate away from the primary fan; through grooves are arranged on both sides of the cabinet, and both ends of the guide plate pass through the through grooves, one end of the guide plate located outside the cabinet is connected to the guide groove, and one end of the guide groove is connected to the water outlet trough, and the water outlet trough fits the cabinet surface; Vertical support rods are respectively installed on both sides of the guide plate, the support rods are in contact with the inner wall of the cabinet, and the support rods pass through the gap between the cabinet and the storage plate; The support rods are respectively provided with a primary baffle and a secondary baffle corresponding to the primary air louver and the secondary air louver. A limiting frame is arranged on the inner wall of the cabinet, and the primary baffle passes through the limiting frame.

2. The moisture-proof device for electrical equipment according to claim 1, characterized in that: A water inlet is provided on a side of the guide groove that is in contact with the cabinet body. The guide groove is inclined toward the water outlet groove, and a water outlet pipe is connected to the water outlet groove.

3. The moisture-proof device for electrical equipment according to claim 1, characterized in that: The height of the storage plate and the first-level fan is located between the first-level air window and the second-level air window, the height of the second-level air window is located between the first-level fan and the through-groove, and the width of the through-groove is greater than the width of the first-level air window and the second-level air window.

4. The moisture-proof device for electrical equipment according to claim 1, characterized in that: A grid plate is arranged on one side of the cabinet body close to the semiconductor refrigeration plate, a heat sink is installed in the cabinet body and is located between the semiconductor refrigeration plate and the grid plate, and a secondary fan is installed on the heat sink.

5. The moisture-proof device for electrical equipment according to claim 1, characterized in that: Both ends of the cabinet are provided with track grooves distributed in an eight-shaped pattern, and wipers are connected between the track grooves. The wipers are located on the surface of the guide plate, and the slope of the track groove is greater than the slopes on both sides of the guide plate.

6. The moisture-proof device for electrical equipment according to claim 1 or 5, characterized in that: A cabinet door is installed on one side of the cabinet body, a plurality of supporting legs are installed outside the cabinet body, an inverted V-shaped rainproof eaves is installed on the cabinet body, and a humidity sensor is arranged inside the cabinet body.

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