A microgrid voltage protection device

Abstract

The application relates to the technical field of voltage protection, in particular to a micro-grid voltage protection device which comprises a device main body, is further provided with a heat dissipation channel communicated with the inside of the device main body, is provided with a heat dissipation fan and a movable shielding assembly in the heat dissipation channel, the inside of the heat dissipation channel is divided into two dehumidification channels, and a dehumidification module is arranged in the dehumidification channel; and the shielding assembly is provided with a sealed cavity and a heating sheet. The shielding assembly is moved to make any one dehumidification module located in the sealed cavity and abut against the heating sheet, so that one dehumidification module performs air dehumidification, and the other dehumidification module performs heating regeneration, thereby ensuring continuous air dehumidification and continuous heat dissipation. The application can improve the reliability and continuity of voltage protection.

Description

Technical Field

[0001] This application relates to the technical field of voltage protection, and in particular to a voltage protection device for microgrids. Background Technology

[0002] As a small-scale power generation and distribution system that integrates distributed power sources, energy storage units and loads, the stable operation of microgrids is highly dependent on the reliability of voltage protection devices. Especially in hot, humid, dusty or temperature-different industrial and coastal environments, the heat accumulation and moisture intrusion caused by voltage fluctuations inside the voltage protection devices can easily lead to component aging, short circuits or even system failures. Therefore, it is necessary to improve the heat dissipation and moisture protection capabilities of voltage protection devices.

[0003] A search revealed Chinese Patent Publication No. CN217036728U, which discloses a microgrid voltage protection device, comprising: a temperature sensor, a controller, a device body, a motor, a cooling fan, a heat dissipation box, a first dehumidification box, a second dehumidification box, a heating element, and a desiccant. Compared with the prior art, this utility model has the following beneficial effects: the temperature sensor can detect the internal temperature of the device body. When the temperature is too high, the controller controls the alarm to issue an alarm signal, which serves as a reminder to the staff. At the same time, the controller controls the motor to start, and the motor drives the cooling fan to rotate, introducing external air into the heat dissipation box, so that the heat inside the device body is discharged to the outside, realizing automatic cooling of the device body. Meanwhile, the first and second dehumidification boxes can prevent external moisture from entering the device body and affecting its internal circuitry. The heating element can remove moisture from the desiccant in the first dehumidification box, making the first dehumidification box reusable.

[0004] The aforementioned technologies have the following drawbacks: Although the dehumidification box can perform preliminary treatment on the external air introduced by the cooling fan, in high humidity environments, the desiccant will quickly become saturated with moisture, and at this time, moisture can still enter the device with the airflow; in addition, when the heating tube heats and regenerates the desiccant, the heat dissipation function needs to be suspended, which will cause the internal temperature of the device to rise sharply. The alternation of heat and moisture will accelerate the corrosion of the circuit and seriously restrict the reliability and service life of the voltage protection device. Utility Model Content

[0005] To improve the reliability and continuity of voltage protection, this application provides a microgrid voltage protection device.

[0006] This application provides a microgrid voltage protection device, which adopts the following technical solution: A microgrid voltage protection device includes a device body and a heat dissipation channel connected to the inside of the device body. The heat dissipation channel is equipped with a heat dissipation fan and a movable shielding component. The heat dissipation channel is divided into two dehumidification channels, and a dehumidification module is provided in the dehumidification channel. The shielding component has a sealed cavity and a heating element. By moving itself, the shielding component can make any one of the dehumidification modules located in the sealed cavity and attached to the heating element.

[0007] Optionally, the shielding assembly includes a rotating shaft arranged coaxially with the heat dissipation channel. The rotating shaft is rotatably connected to the heat dissipation channel around its own axis. The rotating shaft is provided with an embedding groove for embedding heating elements, and the rotating shaft is provided with two sealing plates, which can respectively seal the two ends of the dehumidification channel.

[0008] Optionally, the sealing plate located on the side of the dehumidification channel away from the main body of the device has ventilation holes.

[0009] Optionally, the shielding assembly also includes a stepper motor located outside the heat dissipation channel, with the output shaft of the stepper motor being drivenly connected to the rotating shaft.

[0010] Optionally, a dust filter is embedded in the end of the heat dissipation channel away from the main body of the device.

[0011] Optionally, the rotating shaft is rotatably inserted through the dust filter, and a scraper is provided on the rotating shaft, with the scraper contacting the surface of the dust filter away from the main body of the device.

[0012] Optionally, the end of the rotating shaft is threaded to the scraper, and the side of the dust filter is threaded to the inner wall of the heat dissipation channel.

[0013] Optionally, the outer wall of the heat dissipation channel is provided with two mounting slots that are respectively connected to the corresponding dehumidification channel, and the dehumidification module is inserted into the mounting slot and the dehumidification channel.

[0014] Optionally, the dehumidification module has a baffle plate on the side away from the center of the heat dissipation channel, and the baffle plate is installed on the heat dissipation channel by bolts.

[0015] In summary, this application includes the following beneficial technical effects: 1. When the dehumidification module has absorbed too much moisture, resulting in poor dehumidification effect, the user will start the stepper motor. The stepper motor will drive the rotating shaft to rotate 180°. The rotating shaft will drive the sealing plate and heating element to rotate from dehumidification channel A to dehumidification channel B. At this time, dehumidification channel A, whose outer wall has been heated and regenerated, can continue to dehumidify the filtered air. The heating element will heat and regenerate the dehumidification module in dehumidification channel B, ensuring continuous and uninterrupted dehumidification and heat dissipation, and improving the reliability and continuity of voltage protection. 2. During the rotation of the shaft, the shaft will drive the scraper to rotate and scrape off the dust adhering to the surface of the dust filter to ensure the air circulation effect of the dust filter; 3. During the heat dissipation process of the main body of the device, the cooling fan will start, and the external air filtered by the dust filter will enter the heat dissipation channel. The dehumidification module will dehumidify the filtered air, and the dehumidified air will enter the main body of the device. The heat inside the main body of the device will be discharged through the air duct along with the air, thus realizing the heat dissipation of the inside of the main body of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the protection device according to an embodiment of this application; Figure 2 This is a cross-sectional view of the air duct and dehumidification box according to an embodiment of this application; Figure 3 This is a cross-sectional view of the heat dissipation channel in an embodiment of this application; Figure 4 This is a cross-sectional view of the dehumidification module and shielding component according to an embodiment of this application; Figure 5 This is a cross-sectional view of the dehumidification channel and dehumidification module according to an embodiment of this application; Figure 6 This is an exploded structural diagram of the rotating shaft and scraper in an embodiment of this application.

[0017] Reference numerals: 1. Main body of the device; 11. Air duct; 12. Dehumidification box; 13. Handle; 2. Heat dissipation channel; 21. Air inlet; 22. Air duct; 23. Air outlet; 24. Cooling fan; 25. Dehumidification channel; 26. Mounting groove; 27. Sealing ring; 28. Baffle; 29. ​​Bolt; 3. Dust filter; 31. Circular part; 4. Dehumidification module; 41. Outer shell; 42. Breathable mesh plate; 43. Drying particles; 5. Shielding component; 51. Rotating shaft; 511. Bearing; 512. Embedded groove; 52. Sealing plate; 521. Sealed cavity; 522. Ventilation hole; 53. Heating element; 54. Scraper; 541. Threaded groove; 55. Stepper motor; 56. Driving bevel gear; 57. Driven bevel gear. Detailed Implementation

[0018] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0019] This application discloses a microgrid voltage protection device. For example... Figures 1 to 3As shown, a microgrid voltage protection device includes a device body 1 and a heat dissipation channel 2. The heat dissipation channel 2 has an air inlet 21, an air duct 22, and an air outlet 23. A cooling fan 24 is installed at the air outlet 23, and the air outlet 23 is connected to the interior of the device body 1. An air trough 11 is provided on the side of the device body 1 away from the heat dissipation channel 2. When the cooling fan 24 is started, external air will enter the device body 1 sequentially through the air inlet 21, the air duct 22, and the air outlet 23. The heat inside the device body 1 will be discharged with the air through the air trough 11, thus achieving heat dissipation inside the device body 1.

[0020] like Figure 1 and Figure 2 As shown, a dehumidifying box 12 is provided inside the air duct 11. The dehumidifying box 12 can dehumidify the air, allowing external humid air to enter the main body 1 of the device through the air duct 11. The air duct 11 is arranged in a stepped shape, that is, the outer opening area of ​​the air duct 11 is larger than the inner opening area of ​​the air duct 11. The dehumidifying box 12 is inserted into the outer opening of the air duct 11 and abuts against the stepped surface of the air duct 11 to ensure the stability of the installation of the dehumidifying box 12. A handle 13 is installed on the side of the dehumidifying box 12 away from the main body 1 of the device for easy replacement of the dehumidifying box 12.

[0021] like Figure 3 As shown, a dust filter 3 is provided inside the air inlet 21. The dust filter 3 can filter the air entering the heat dissipation channel 2 to prevent external dust from entering the device body 1. The side of the dust filter 3 facing the device body 1 is attached to the end of the heat dissipation channel 2, and the side of the dust filter 3 facing the device body 1 is integrally formed with a ring part 31. The ring part 31 is threaded into the inner wall of the heat dissipation channel 2 so as to facilitate the installation and removal of the dust filter 3 on the heat dissipation channel 2.

[0022] like Figures 3 to 5 As shown, the air duct 22 is divided into two dehumidification channels 25 arranged circumferentially around the axis of the air duct 22. The dehumidification channel 25 is equipped with a dehumidification module 4. The dehumidification module 4 is used to dehumidify the air entering the heat dissipation channel 2 to prevent humid air from entering the interior of the device body 1. The dehumidification module 4 includes a shell 41. The front and rear sides of the shell 41 are equipped with breathable mesh plates 42. The shell 41 is filled with drying particles 43. During the dehumidification process, the outside air enters the interior of the shell 41 through the breathable mesh plates 42, and the drying particles 43 will dehumidify the outside air.

[0023] The outer wall of the heat dissipation channel 2 is provided with two mounting slots 26 that are respectively connected to the corresponding dehumidification channel 25. The dehumidification module 4 is inserted into the mounting slot 26 and the dehumidification channel 25 to facilitate the installation and removal of the dehumidification module 4. A sealing ring 27 is provided between the groove wall of the mounting slot 26 and the side wall of the dehumidification module 4. The sealing ring 27 is fixed on the groove wall of the mounting slot 26 to ensure the sealing between the groove wall of the mounting slot 26 and the side wall of the dehumidification module 4.

[0024] like Figure 3 and Figure 4 As shown, the dehumidification module 4 has two baffles 28 on the side away from the center of the heat dissipation channel 2. The two baffles 28 are respectively located on the left and right sides of the dehumidification module 4, and the baffles 28 are installed on the heat dissipation channel 2 by bolts 29. The bolts 29 pass through the baffles 28 and are threaded into the heat dissipation channel 2, so that the baffles 28 are limited and fixed. The baffles 28 will block and limit the dehumidification module 4 within the mounting groove 26 and the dehumidification channel 25 to ensure the stability of the dehumidification module 4 during use.

[0025] A movable shielding assembly 5 is provided inside the air duct 22. The shielding assembly 5 includes a rotating shaft 51 arranged coaxially with the heat dissipation channel 2. Both ends of the rotating shaft 51 are rotatably mounted in the air duct 22 via bearings 511, allowing the rotating shaft 51 to rotate around its own axis and connect to the air duct 22. Two sealing plates 52 are welded to the side wall of the rotating shaft 51, and the opposite sides of the two sealing plates 52 together form a sealed cavity 521. By rotating the rotating shaft 51, the two sealing plates 52 can be rotated to either of the dehumidification channels 25. At this time, the two sealing plates 52 will respectively seal the two ends of the dehumidification channel 25, allowing the user to choose to use one of the two dehumidification channels 25 during the dehumidification process. By alternating the use of the two dehumidification channels 25, continuous dehumidification of the air is ensured, preventing humid air from entering the interior of the device body 1.

[0026] The side wall of the rotating shaft 51 is provided with an embedding groove 512, and a heating element 53 is fixedly embedded in the embedding groove 512. The heating element 53 can be a PTC heating element 53. The heating element 53 is located between two sealing plates 52. When the two sealing plates 52 are jointly closed in one of the dehumidification channels 25, the heating element 53 will abut against the outer shell 41 of the dehumidification module 4 in the dehumidification channel 25, so that the heating element 53 can heat the dehumidification module 4 to realize the regeneration of the dry particles 43. The sealing plate 52 located on the side of the dehumidification channel 25 away from the main body 1 is provided with multiple vent holes 522, so that the moisture in the dry particles 43 can be discharged to the outside in time through the vent holes 522.

[0027] It is worth noting that the outer shell 41 is made of a metal with high thermal conductivity, such as aluminum alloy, which allows the outer shell 41 to quickly transfer the heat from the heating element 53 to improve the regeneration effect of the dried particles 43.

[0028] like Figure 3 As shown, one end of the rotating shaft 51 is rotatably inserted through the dust filter 3, and a scraper 54 is provided on the rotating shaft 51. The scraper 54 abuts against the surface of the dust filter 3 away from the main body 1 of the device. During the rotation of the rotating shaft 51, the rotating shaft 51 not only realizes the switching of the dehumidification channel 25, but also causes the scraper 54 to rotate and scrape off the dust attached to the surface of the dust filter 3, so as to ensure the air circulation effect of the dust filter 3.

[0029] like Figure 6 As shown, it is worth noting that the scraper 54 is provided with a threaded groove 541, and the end of the rotating shaft 51 is threaded into the threaded groove 541, so that the scraper 54 can be rotated and tightened on the rotating shaft 51 and abut against the surface of the dust filter screen 3, so as to realize the dust cleaning function of the scraper 54 and facilitate the disassembly and assembly of the scraper 54 and the dust filter screen 3.

[0030] like Figure 3 As shown, the shielding assembly 5 also includes a stepper motor 55 mounted on the outer wall of the heat dissipation channel 2. The output shaft of the stepper motor 55 drives the rotating shaft 51 through a driving bevel gear 56 and a driven bevel gear 57. The driving bevel gear 56 is fixedly sleeved on the output shaft of the stepper motor 55, and the driven bevel gear 57 is fixedly sleeved on the rotating shaft 51. The driving bevel gear 56 meshes with the driven bevel gear 57 to enable the stepper motor 55 to drive the rotating shaft 51.

[0031] The implementation principle of a microgrid voltage protection device in this application embodiment is as follows: During the heat dissipation process of the device body 1, the cooling fan 24 will be started, and the external air filtered by the dust filter 3 will enter the heat dissipation channel 2. The dehumidification module 4 will dehumidify the filtered air, and the dehumidified air will enter the device body 1. The heat inside the device body 1 will be discharged with the air through the air duct 11, thereby realizing the heat dissipation of the inside of the device body 1.

[0032] When the dehumidification module 4 absorbs too much moisture, resulting in poor dehumidification, the user will activate the stepper motor 55. The stepper motor 55 will drive the rotating shaft 51 to rotate 180°. The rotating shaft 51 will drive the scraper 54 to rotate and clean the dust on the surface of the dust filter 3, ensuring the air circulation effect of the dust filter 3. The rotating shaft 51 will also drive the sealing plate 52 and the heating element 53 to rotate from the A dehumidification channel 25 to the B dehumidification channel 25. At this time, the A dehumidification channel 25, whose outer wall has been heated and regenerated, can continue to dehumidify the filtered air. The heating element 53 will heat and regenerate the dehumidification module 4 in the B dehumidification channel 25, ensuring continuous and uninterrupted dehumidification and heat dissipation, and improving the reliability and continuity of voltage protection.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A microgrid voltage protection device, comprising a device body, characterized in that: It also includes a heat dissipation channel connected to the inside of the main body of the device. The heat dissipation channel is equipped with a heat dissipation fan and a movable shielding component. The heat dissipation channel is divided into two dehumidification channels, and a dehumidification module is installed in the dehumidification channel. The shielding component has a sealed cavity and a heating element. By moving itself, the shielding component can make any one of the dehumidification modules located in the sealed cavity and attached to the heating element.

2. The microgrid voltage protection device according to claim 1, characterized in that: The shielding assembly includes a rotating shaft arranged coaxially with the heat dissipation channel. The rotating shaft is rotatably connected to the heat dissipation channel around its own axis. The rotating shaft is provided with an embedding groove for embedding heating elements, and the rotating shaft is provided with two sealing plates. The two sealing plates can be respectively sealed at both ends of the dehumidification channel.

3. A microgrid voltage protection device according to claim 2, characterized in that: Ventilation holes are provided on the sealing plate located on the side of the dehumidification channel away from the main body of the device.

4. A microgrid voltage protection device according to claim 2, characterized in that: The shielding assembly also includes a stepper motor located outside the heat dissipation channel, with the output shaft of the stepper motor being drivenly connected to the rotating shaft.

5. A microgrid voltage protection device according to claim 4, characterized in that: A dust filter is embedded in the end of the heat dissipation channel away from the main body of the device.

6. A microgrid voltage protection device according to claim 5, characterized in that: The rotating shaft is rotatably inserted through the dust filter, and a scraper is provided on the rotating shaft. The scraper abuts against the surface of the dust filter away from the main body of the device.

7. A microgrid voltage protection device according to claim 6, characterized in that: The end of the rotating shaft is threaded to the scraper, and the side of the dust filter is threaded to the inner wall of the heat dissipation channel.

8. A microgrid voltage protection device according to claim 1, characterized in that: The outer wall of the heat dissipation channel is provided with two mounting slots that are respectively connected to the corresponding dehumidification channel, and the dehumidification module is inserted into the mounting slot and the dehumidification channel.

9. A microgrid voltage protection device according to claim 8, characterized in that: The dehumidification module has a baffle plate on the side away from the center of the heat dissipation channel, and the baffle plate is installed on the heat dissipation channel by bolts.

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