A low-voltage reactive power compensation cabinet and a low-voltage reactive power compensation device

Abstract

The application belongs to the technical field of compensation cabinets, and provides a drawer type low-voltage reactive power compensation cabinet and a low-voltage reactive power compensation device. The compensation cabinet comprises a cabinet body, a rear cover plate is hinged to one side of the cabinet body, a second partition plate is fixedly installed in the cabinet body, a plurality of first partition plates are fixedly installed on the second partition plate, a plurality of drawer boxes are arranged in the cabinet body and are spaced apart from the first partition plates, a through hole is formed in the side wall of the drawer box, an air outlet hole is formed in the side of the drawer box close to the second partition plate, and a busbar module used in cooperation with the drawer box is fixedly installed on the second partition plate. Compared with the prior art, the application has the following beneficial effects: when the cold air moves in the horizontal pipe, the moisture in the air is adsorbed by the molecular sieve, so that the humid air is prevented from entering the drawer box, and the air circulation in the drawer box and the air circulation in the cabinet body form two separate air circulation systems, thereby further improving the cooling effect.

Description

Technical Field

[0001] This invention belongs to the field of compensation cabinet technology, and particularly relates to a drawer-type low-voltage reactive power compensation cabinet and a low-voltage reactive power compensation device. Background Technology

[0002] With the continuous development of society, the electrical automation industry has developed rapidly. Low-voltage reactive power compensation cabinets are a very important component of this industry.

[0003] Low-voltage reactive power compensation cabinets are fixed cabinets with components packaged in bulk, and have a protection rating of IP2X or IP3X. To meet the heat dissipation requirements of the components inside the cabinet, fans are usually installed at the rear door of the cabinet for cooling. Most existing low-voltage reactive power compensation cabinets use dust filters to block the air inlet for heat dissipation. Although the dust filters can block dust, they cannot block moisture carried in the air. Therefore, when used in a humid environment, a large amount of moisture will enter the cabinet, causing the components inside the cabinet to become unusable or damaged, resulting in poor protection. Summary of the Invention

[0004] The purpose of this invention is to provide a drawer-type low-voltage reactive power compensation cabinet and a low-voltage reactive power compensation device, which aims to solve the technical problem in the prior art where humid air entering the cabinet causes damage to components and renders them unusable.

[0005] The present invention is implemented as follows: a drawer-type low-voltage reactive power compensation cabinet includes a cabinet body, a rear cover plate hinged to one side of the cabinet body, a second partition plate fixedly installed inside the cabinet body, and multiple sets of first partition plates fixedly installed on the second partition plate, multiple sets of drawer boxes spaced apart from the first partition plates are provided inside the cabinet body, the drawer box has through holes on its side wall and an air outlet hole on the side of the drawer box near the second partition plate, and a busbar module for use with the drawer box is fixedly installed on the second partition plate.

[0006] The cabinet body has grooves on both sides corresponding to the drawer boxes. Two sets of horizontal tubes are fixedly installed in the grooves. Two sets of grid plates are installed in the horizontal tubes, and molecular sieves are filled between the two sets of grid plates. The horizontal tubes are connected to the area of ​​the cabinet body where the corresponding drawer box is located. The two ends of the grooves are respectively provided with air inlets and exhaust holes opened on the side wall of the cabinet body. An air intake fan is rotatably installed in the air inlet and the air inlet is connected to both sets of horizontal tubes. A dustproof net is provided at the end of the air inlet. The exhaust hole is connected to the groove and is connected to the air outlet on the corresponding drawer box through a first duct. A first exhaust fan is rotatably installed in the first duct.

[0007] A further technical solution: multiple sets of spaced-apart air intake slots are provided at the upper and lower ends of the rear cover plate, and multiple sets of second exhaust fans are fixedly installed at the end of the rear cover plate away from the air intake slots.

[0008] A further technical solution: A second conduit is connected to the horizontal tube, and the second conduit is connected to the air intake chamber fixedly installed in the groove. Multiple sets of spaced cooling holes are opened on the side wall of the air intake chamber.

[0009] A further technical solution: Support plates are fixedly installed at both ends of the horizontal tube. A through hole with a step is opened in the middle of the support plate. A bracket is fixedly installed on the support plate, and a baffle for closing the through hole on the support plate is slidably installed on the bracket. A first elastic element is fixedly installed on the surface of the baffle away from the support plate, and the end of the first elastic element away from the baffle is fixedly connected to the bracket.

[0010] A further technical solution: A second crossbar is provided inside the horizontal tube, and a first crossbar is slidably installed at both ends of the second crossbar. A grid plate is fixedly installed at the end of the first crossbar away from the second crossbar. An airbag located on the side of the grid plate away from the second crossbar is fixedly installed on the first crossbar. The airbag is in contact with the inner wall of the horizontal tube. A retaining ring that works with the airbag is fixedly installed at both ends of the horizontal tube. The retaining ring is spaced from the inner wall of the horizontal tube.

[0011] A further technical solution: The exhaust port is connected to two sets of horizontal pipes and a third conduit is connected to the horizontal pipes. The third conduit is connected to the outside and the area inside the horizontal pipe is separated by an airbag.

[0012] A further technical solution: The end of the first crossbar is provided with a connecting groove for the second crossbar to extend into. The end of the first crossbar near the second crossbar is fixedly installed with a second elastic member distributed around the second crossbar. The end of the second elastic member away from the first crossbar is fixedly connected to the middle of the second crossbar.

[0013] A further technical solution: A first magnetic ring is fixedly installed on the second crossbar. The first magnetic ring slides in contact with the inner wall of the cross tube, and a second magnetic ring is slidably installed on the outer side of the cross tube. The second magnetic ring attracts the first magnetic ring. A synchronous belt is provided in the groove to drive the second magnetic rings on the two sets of cross tubes to move synchronously in opposite directions.

[0014] A further technical solution: Two sets of rotating shafts are rotatably installed in the groove, the rotating shafts pass through all the grooves, a synchronous pulley located in the groove is fixedly installed on the rotating shaft, a synchronous belt is rotatably installed on the synchronous pulley, a connecting rod is fixedly connected to the second magnet ring, the connecting rod is fixedly connected to the synchronous belt, and a rotating power component that drives one set of rotating shafts to rotate is fixedly installed in the lowest groove.

[0015] The present invention also provides a low-voltage reactive power compensation device, which includes the drawer-type low-voltage reactive power compensation cabinet described above, and further includes multiple sets of reactive power compensation modules and a reactive power compensation controller. The reactive power compensation controller is installed on the cabinet, and the multiple sets of reactive power compensation modules are respectively installed in the corresponding drawer boxes.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. The second exhaust fan draws air from the area between the second partition and the rear cover and exhausts it outwards. Cold air from the outside enters the cabinet through the air intake slot below, thus achieving air circulation. The air circulation in the area between the second partition and the rear cover dissipates heat from the cabinet and the second cover, thereby reducing the air temperature inside the cabinet and providing auxiliary cooling for the components inside the cabinet. When the intake fan rotates, it sends cold air from the outside into the drawer box and exhausts it through the first exhaust fan. Cold air from the outside can only enter the drawer box through the air intake and horizontal pipe. When the cold air moves in the horizontal pipe, it is adsorbed by the molecular sieve, preventing humid air from entering the drawer box and affecting the operation of the components or causing damage to the components. This achieves cooling of the equipment while ensuring stable operation, improving the safety of equipment use. The separate air circulation in the drawer box and the separate air circulation in the cabinet form two separate air circulation systems that do not affect each other and further enhance the cooling effect.

[0018] 2. The structure, including support plates, baffles, and airbags, connects the two sets of horizontal pipes to the air inlet and exhaust ports respectively during use. After a set period of use, the connection between the two sets of horizontal pipes and the air inlet and exhaust ports changes, altering the airflow state within them. The cold air is then dehumidified by the molecular sieve, and subsequently, hot air is used to heat the used molecular sieve, causing moisture to desorb and be discharged. This utilizes the waste heat from the exhaust air, eliminating the need for machine shutdown, replacement, or separate heating of the molecular sieve. This ensures stable airflow and exhaust, guaranteeing effective heat dissipation for the components inside the cabinet.

[0019] 3. After the baffle contacts the limiting block on the bracket, the second crossbar continues to move back and forth, causing the grid plate away from the baffle to move and squeeze the molecular sieve. Then, as the synchronous belt 30 resets, the grid plate resets, the molecular sieve loosens, and the molecular sieve moves during the process of being squeezed and released. The gaps formed by the molecular sieve change, and the position and angle of the molecular sieve change, so that different molecular sieves can fully contact the air, improve the moisture absorption and thermal desorption effect of the molecular sieve, avoid excessive contact of local molecular sieves with air, which would affect the subsequent use effect, and further ensure the heat dissipation effect of the components in the cabinet. Attached Figure Description

[0020] Figure 1 This is a first-view overall structural diagram of the present invention.

[0021] Figure 2 This is a schematic diagram of the overall structure of the present invention from a second perspective.

[0022] Figure 3 This is a schematic diagram of the internal structure of the cabinet in this invention.

[0023] Figure 4 This is a schematic diagram of the structure of the first catheter in this invention.

[0024] Figure 5 This is a schematic diagram of the drawer box in this invention.

[0025] Figure 6 This is a schematic diagram of the structure of the horizontal tube in this invention.

[0026] Figure 7 This is a schematic diagram of the cooling hole structure in this invention.

[0027] Figure 8 This is a schematic diagram of the air intake chamber in this invention.

[0028] Figure 9 This is a schematic diagram of the internal structure of the horizontal tube in this invention.

[0029] Figure 10 This is a front view of the horizontal tube in this invention.

[0030] Figure 11 for Figure 10 A magnified view of region A1 in the middle.

[0031] Figure 12 for Figure 10 A magnified view of region A2 in the middle.

[0032] In the attached diagram: 1. Cabinet body; 2. First partition; 3. Second partition; 4. Rear cover; 5. Busbar module; 6. Drawer box; 7. Air outlet; 8. First duct; 9. First exhaust fan; 10. Recess; 11. Air inlet; 12. Intake fan; 13. Exhaust outlet; 14. Horizontal pipe; 15. Support plate; 16. Bracket; 17. Baffle; 18. First elastic element; 19. First crossbar; 20. Grille; 21. Airbag; 22. Baffle 23. Ring; 24. Second crossbar; 25. Connecting groove; 26. Second elastic element; 27. First magnetic ring; 28. Second magnetic ring; 29. ​​Rotating shaft; 30. Synchronous pulley; 31. Synchronous belt; 32. Connecting rod; 33. Rotating power element; 34. Second duct; 35. Third duct; 36. Intake chamber; 37. Intake hole; 38. Reactive power compensation module; 39. Reactive power compensation controller; 40. Second exhaust fan; 41. Intake slot. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0034] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0035] like Figures 1-12 As shown, a drawer-type low-voltage reactive power compensation cabinet provided by the present invention includes a cabinet body 1. A rear cover plate 4 is hinged to one side of the cabinet body 1. Multiple sets of spaced air inlet slots 40 are opened at the upper and lower ends of the rear cover plate 4. Multiple sets of second exhaust fans 39 are fixedly installed on the end of the rear cover plate 4 away from the air inlet slots 40. A second partition plate 3 is fixedly installed inside the cabinet body 1, and multiple sets of first partition plates 2 are fixedly installed on the second partition plate 3. Multiple sets of drawer boxes 6 are provided inside the cabinet body 1, spaced apart from the first partition plates 2. Through holes are opened on the side wall of the drawer box 6, and an air outlet 7 is opened on the side of the drawer box 6 near the second partition plate 3. A busbar module 5 that works with the drawer box 6 is fixedly installed on the second partition plate 3.

[0036] On both sides of the cabinet 1, corresponding to the drawer box 6, there are grooves 10. Two sets of horizontal pipes 14 are fixedly installed in the grooves 10. Two sets of grid plates 20 are set in the horizontal pipes 14, and molecular sieves are filled between the two sets of grid plates 20. The horizontal pipes 14 are connected to the area of ​​the cabinet 1 where the corresponding drawer box 6 is located. A second conduit 33 is connected to the horizontal pipes 14. The second conduit 33 is connected to the air inlet chamber 35 fixedly installed in the groove 10. Multiple sets of cooling holes 36 are opened on the side wall of the air inlet chamber 35. At both ends of the groove 10, there are air inlet holes 11 and exhaust holes 13 opened on the side wall of the cabinet 1, respectively. An air intake fan 12 is rotatably installed in the air inlet hole 11 and the air inlet hole 11 is connected to both sets of horizontal pipes 14. A dustproof net is set at the end of the air inlet hole 11. The exhaust hole 13 is connected to the groove 10 and is connected to the air outlet hole 7 on the corresponding drawer box 6 through a first conduit 8. A first exhaust fan 9 is rotatably installed in the first conduit 8.

[0037] In practical application, the drawer box 6 is installed in the designated area enclosed by the first partition 2 and the second partition 3 via guide rails. After installation, the drawer box 6 is connected to the busbar module 5 and powered on, and the air outlet 7 is connected to the first duct 8. Then it can be used. When in use, the intake fan 12, the first exhaust fan 9 and the second exhaust fan 39 are turned on. The second exhaust fan 39 draws air from the area between the second partition 3 and the rear cover 4 and exhausts it outward. Outside cold air enters the cabinet 1 from the air inlet slot 40 below, thereby realizing air circulation. The air circulation in the area between the second partition 3 and the rear cover 4 dissipates heat from the cabinet 1 and the second partition 3, thereby reducing the air temperature in the cabinet 1 and achieving auxiliary cooling of the components in the cabinet 1. The area between the second partition 3 and the rear cover 4 is not connected to the area where the drawer box 6 is located, avoiding dust and moisture from entering the drawer box 6 and affecting the operation of the components.

[0038] When the intake fan 12 rotates, it draws in outside cold air through the intake port 11. The air then enters the horizontal pipe 14, where it moves through the molecular sieve between the grille plates 20. It then enters the intake chamber 35 through the second duct 33. The cold air then enters the area containing the drawer box 6 through the cooling hole 36. The cold air enters the drawer box 6 through the through-holes on its side wall to cool the components inside. Hot air rises, and under the action of the first exhaust fan 9, it draws out the hot air from the upper part of the drawer box 6. The hot air then enters the exhaust port 13 along the first duct 8. The airflow exits from cabinet 1, thereby enabling air circulation within drawer box 6. Outside cold air can only enter drawer box 6 through air inlet 11 and horizontal pipe 14. As the cold air moves through horizontal pipe 14, it adsorbs moisture in the air through molecular sieves, preventing humid air from entering drawer box 6 and affecting or damaging components. This achieves cooling of the equipment while ensuring stable operation, improving the safety of equipment use. Furthermore, the separate air circulation within drawer box 6 and the separate air circulation within cabinet 1 form two independent air circulation systems that do not interfere with each other and further enhance the cooling effect.

[0039] like Figures 1-12 As shown, a drawer-type low-voltage reactive power compensation cabinet provided by the present invention has support plates 15 fixedly installed at both ends of the horizontal tube 14. A through hole with a step is opened in the middle of the support plate 15. A bracket 16 is fixedly installed on the support plate 15, and a baffle 17 for closing the through hole on the support plate 15 is slidably installed on the bracket 16. A first elastic member 18 is fixedly installed on the surface of the baffle 17 away from the support plate 15. The end of the first elastic member 18 away from the baffle 17 is fixedly connected to the bracket 16.

[0040] Specifically, a second crossbar 23 is provided inside the horizontal tube 14, and a first crossbar 19 is slidably installed at both ends of the second crossbar 23. The grid plate 20 is fixedly installed at the end of the first crossbar 19 away from the second crossbar 23. An airbag 21 located on the side of the grid plate 20 away from the second crossbar 23 is fixedly installed on the first crossbar 19. The airbag 21 is in contact with the inner wall of the horizontal tube 14. A retaining ring 22 that cooperates with the airbag 21 is fixedly installed at both ends of the horizontal tube 14. The retaining ring 22 is spaced from the inner wall of the horizontal tube 14.

[0041] Specifically, the exhaust port 13 is connected to two sets of horizontal pipes 14 and a third conduit 34 is connected to the horizontal pipes 14. The third conduit 34 is connected to the outside and the area inside the horizontal pipes 14 is separated by the airbag 21.

[0042] Specifically, the end of the first crossbar 19 is provided with a connecting groove 24 into which the second crossbar 23 extends. The end of the first crossbar 19 near the second crossbar 23 is fixedly installed with a second elastic member 25 distributed around the second crossbar 23. The end of the second elastic member 25 away from the first crossbar 19 is fixedly connected to the middle of the second crossbar 23.

[0043] Specifically, a first magnetic ring 26 is fixedly installed on the second crossbar 23. The first magnetic ring 26 slides in contact with the inner wall of the cross tube 14, and a second magnetic ring 27 is slidably installed on the outer side of the cross tube 14. The second magnetic ring 27 attracts the first magnetic ring 26. A synchronous belt 30 is provided in the groove 10 to drive the second magnetic rings 27 on the two sets of cross tubes 14 to move synchronously in opposite directions.

[0044] Specifically, two sets of rotating shafts 28 are rotatably installed in the groove 10, and the rotating shafts 28 pass through all the grooves 10. A synchronous pulley 29 located in the groove 10 is fixedly installed on the rotating shaft 28. A synchronous belt 30 is rotatably installed on the synchronous pulley 29. A connecting rod 31 is fixedly connected to the second magnet ring 27. The connecting rod 31 is fixedly connected to the synchronous belt 30. A rotating power component 32 that drives one of the rotating shafts 28 to rotate is fixedly installed in the lowest groove 10.

[0045] In practical application, the rotating power component 32 drives one set of rotating shafts 28 to rotate. The rotating shafts 28 drive the synchronous belt 30 to rotate through the synchronous wheel 29. The synchronous belt 30 drives the second magnetic ring 27 to move through the connecting rod 31. The two sets of second magnetic rings 27 move in opposite directions. The second magnetic rings 27 drive the second crossbar 23 to move through the first magnetic ring 26, so that the molecular sieves in the two sets of horizontal tubes 14 are located at different ends. The second crossbar 23 moves towards one end of the horizontal tube 14. When the end of the first crossbar 19 contacts the baffle 17, the airbag 21 contacts the retaining ring 22. Then the first crossbar 19 continues to move, pushing the baffle 17 to move and compressing the first elastic element 18 until the baffle 17 contacts the limiting block on the support 16. At the same time, the airbag 21 will also tilt and deform due to the obstruction of the retaining ring 22 and will no longer contact the inner wall of the horizontal tube 14. The other set of airbags 21 remains in its original state.

[0046] At this time, the second conduit 33 and the third conduit 34 are located between the airbag 21 and the grille plate 20. The air in the subsequent air inlet 11 or exhaust port 13 can pass through the support plate 15 and through the molecular sieve, and then leave the horizontal pipe 14 through the second conduit 33 or the third conduit 34. After the position of the molecular sieve is adjusted, it can be used. At this time, the cold air entering the air inlet 11 enters a set of horizontal pipes 14 connected to it. The cold air passes through the support plate 15 and through the molecular sieve, and then leaves the horizontal pipe 14 through the second conduit 33 and enters the area where the drawer box 6 is located. At the same time, the hot air in the exhaust port 13 enters a set of horizontal pipes 14 connected to it. The hot air passes through the support plate 15 and through the molecular sieve, and then leaves the horizontal pipe 14 through the third conduit 34, thus realizing a complete air intake cycle.

[0047] After the set time is used, the rotating shaft 28 rotates in the reverse direction. At this time, the first horizontal bar 19 no longer pushes the baffle 17. The baffle 17 is reset under the action of the first elastic element 18 to prevent air from entering the horizontal pipe 14. Finally, the connection state between the two sets of horizontal pipes 14 and the air inlet 11 and the exhaust port 13 is changed. At this time, the air flowing in the two sets of horizontal pipes 14 changes. The cold air is dehumidified by the molecular sieve, and the used molecular sieve is heated by the hot air to desorb and discharge the moisture. The waste heat of the hot air discharged by the equipment is utilized. There is no need to stop the machine to replace or separately heat the molecular sieve, which ensures the stability of the air intake and exhaust and ensures the heat dissipation effect of the components in the cabinet 1.

[0048] After the baffle 17 contacts the limiting block on the bracket 16, the synchronous belt 30 continues to rotate a set distance and then returns to the initial position where the baffle 17 contacts the limiting block on the bracket 16. This reciprocating motion causes the synchronous belt 30 to move the second crossbar 23 a set length. At this time, the second crossbar 23 will drive the first crossbar 19, which is not in contact with the baffle 17, to move and compress the second elastic element 25 on the front side of the movement direction. The first crossbar 19 drives the grid plate 20, which is away from the baffle 17, to move and squeeze the molecular sieve. Then, as the synchronous belt 30 resets, the grid plate 20 resets, the molecular sieve loosens, and the molecular sieve moves during the process of being squeezed and released. The gaps formed by the molecular sieve change, and the position and angle of the molecular sieve change, so that different molecular sieves can fully contact the air, improving the moisture absorption and thermal desorption effect of the molecular sieve, avoiding excessive contact between local molecular sieves and air, which would affect the subsequent use effect, and further ensuring the heat dissipation effect of the components inside the cabinet 1.

[0049] In one embodiment of the present invention, the rotating power component 32 is a motor, but it can also be a hydraulic motor or other components capable of outputting rotational power. The motor drives the rotating shaft 28 to rotate, thereby causing the molecular sieve to move in the horizontal tube 14. The first elastic component 18 and the second elastic component 25 are the first spring and the second spring, respectively, or they can be elastic components such as elastic balls. The first spring applies a restoring thrust to the baffle 17, and the second spring keeps the first crossbar 19 and the second crossbar 23 in position.

[0050] like Figures 1-12 As shown, this invention provides a low-voltage reactive power compensation device, which includes the drawer-type low-voltage reactive power compensation cabinet described above, and also includes multiple sets of reactive power compensation modules 37 and reactive power compensation controllers 38. The reactive power compensation controllers 38 are mounted on the cabinet 1, and the multiple sets of reactive power compensation modules 37 are respectively installed in the corresponding drawer boxes 6.

[0051] In practical application, different reactive power compensation modules 37 are installed in the drawer box 6, and then the drawer box 6 is installed on the cabinet 1. Subsequently, the operation of each group of reactive power compensation modules 37 is controlled by the reactive power compensation controller 38.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A drawer type low voltage reactive power compensation cabinet, comprising a cabinet body (1), a rear cover plate (4) is hinged on one side of the cabinet body (1), characterized in that, The second partition plate (3) is fixedly installed in the cabinet body (1), and a plurality of first partition plates (2) are fixedly installed on the second partition plate (3); a plurality of drawer boxes (6) are arranged in the cabinet body (1) and are spaced apart from the first partition plates (2); a plurality of through holes are formed in the side wall of the drawer box (6), and an air outlet hole (7) is formed in the side of the drawer box (6) close to the second partition plate (3); and a female bus module (5) is fixedly installed on the second partition plate (3) and cooperates with the drawer box (6); The recess (10) is provided on the side of the cabinet body (1) corresponding to the drawer box (6), two groups of horizontal pipes (14) are fixedly installed in the recess (10), two groups of grating plates (20) are arranged in the horizontal pipe (14) and are filled with molecular sieve between the two groups of grating plates (20), the horizontal pipe (14) is communicated with the area of the corresponding drawer box (6) of the cabinet body (1), the air inlet hole (11) and the air outlet hole (13) are arranged at the two ends of the recess (10) and are formed in the side wall of the cabinet body (1), the air inlet fan (12) is rotatably installed in the air inlet hole (11) and is communicated with the two groups of horizontal pipes (14), the air outlet hole (13) is communicated with the recess (10), the air outlet hole (13) is communicated with the air outlet hole (7) on the corresponding drawer box (6) through the first duct (8), and the first air outlet fan (9) is rotatably installed in the first duct (8); A plurality of air inlet grooves (40) are formed in the upper and lower ends of the rear cover plate (4), and a plurality of second air outlet fans (39) are fixedly installed on the end of the rear cover plate (4) away from the air inlet grooves (40). The second duct (33) is communicated with the horizontal pipe (14) and is communicated with the air inlet chamber (35) fixedly installed in the recess (10), and a plurality of cooling holes (36) are formed in the side wall of the air inlet chamber (35) and are spaced apart.

2. The drawer-type low-voltage reactive power compensation cabinet according to claim 1, characterized in that, The two ends of the horizontal pipe (14) are fixedly installed with the supporting plates (15), the supporting plates (15) are provided with stepped through holes in the middle portions, the supporting plates (15) are fixedly installed with the brackets (16), the baffles (17) for closing the through holes of the supporting plates (15) are slidably installed on the brackets (16), the first elastic members (18) are fixedly installed on the surfaces of the baffles (17) away from the supporting plates (15), and the one ends of the first elastic members (18) away from the baffles (17) are fixedly connected with the brackets (16).

3. A drawer-type low-voltage reactive power compensation cabinet according to claim 2, characterized in that, The second horizontal rods (23) are arranged in the horizontal pipe (14), the first horizontal rods (19) are slidably installed at the two ends of the second horizontal rods (23), the grating plates (20) are fixedly installed at the one ends of the first horizontal rods (19) away from the second horizontal rods (23), the air bags (21) are fixedly installed on the first horizontal rods (19) and are located on the sides of the grating plates (20) away from the second horizontal rods (23), the air bags (21) are in contact with the inner walls of the horizontal pipe (14), the stop rings (22) are fixedly installed at the two ends of the horizontal pipe (14) and cooperate with the air bags (21), and the stop rings (22) are spaced apart from the inner walls of the horizontal pipe (14).

4. A drawer-type low-voltage reactive power compensation cabinet according to claim 3, characterized in that, The exhaust hole (13) is communicated with two groups of transverse pipes (14), and a third conduit (34) is communicated on the transverse pipe (14), the third conduit (34) is communicated with the outside, and the transverse pipe (14) is divided into areas by the air bag (21).

5. A drawer-type low-voltage reactive power compensation cabinet according to claim 3, characterized in that, The end of the first cross bar (19) is provided with a connecting groove (24) for extending the second cross bar (23), and the end of the first cross bar (19) close to the second cross bar (23) is fixedly installed with a second elastic member (25) distributed around the second cross bar (23), and the end of the second elastic member (25) away from the first cross bar (19) is fixedly connected with the middle part of the second cross bar (23).

6. A drawer-type low-voltage reactive power compensation cabinet according to claim 5, characterized in that, The second cross bar (23) is fixedly installed with a first magnet ring (26), the first magnet ring (26) is in sliding contact with the inner wall of the transverse pipe (14), and the outer side of the transverse pipe (14) is slidingly installed with a second magnet ring (27), the second magnet ring (27) is attracted to the first magnet ring (26), and the recess (10) is provided with a synchronous belt (30) for driving the second magnet ring (27) on the two groups of transverse pipes (14) to move synchronously and reversely.

7. A drawer-type low-voltage reactive power compensation cabinet according to claim 6, characterized in that, The recess (10) is rotatably installed with two groups of rotating shafts (28), the rotating shafts (28) penetrate all the recesses (10), the rotating shafts (28) are fixedly installed with synchronous wheels (29) located in the recesses (10), the synchronous belt (30) is rotatably installed on the synchronous wheels (29), the second magnet ring (27) is fixedly connected with a connecting rod (31), the connecting rod (31) is fixedly connected with the synchronous belt (30), and the lowermost recess (10) is fixedly installed with a rotating power member (32) for driving one of the rotating shafts (28) to rotate.

8. A low voltage var compensation device, characterized by, The low-voltage reactive power compensation cabinet comprises a plurality of groups of the low-voltage reactive power compensation modules (37) and a low-voltage reactive power compensation controller (38), the low-voltage reactive power compensation controller (38) is arranged on the cabinet body (1), and the low-voltage reactive power compensation modules (37) are arranged in the corresponding drawer boxes (6).

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