A low-voltage capacitor compensation cabinet that is convenient for heat dissipation and ventilation

Abstract

The present invention relates to a low-voltage capacitor compensation cabinet that is convenient for heat dissipation and ventilation, and belongs to the technical field of electric power equipment. The low-voltage capacitor compensation cabinet that is convenient for heat dissipation and ventilation includes a cabinet body and a base. The cabinet body is arranged on the base, and an air inlet cavity is provided in the base, and the air inlet cavity is connected with the inside of the cabinet body. An air inlet connected with the air inlet cavity is provided on the base, and a filtering and dehumidifying component for filtering and dehumidifying the air entering the air inlet cavity is provided at the air inlet, and a heat dissipation fan is installed in the air inlet cavity, and the air outlet end of the heat dissipation fan is connected with the inside of the cabinet body. A vent is provided on the top of the cabinet body, and the vent is covered with a breathable film. The present invention has the effect of preventing external humid air from easily entering the cabinet body when ventilating and dissipating the heat of electrical components in the cabinet body, which helps to ensure the service life of the electrical components in the cabinet body.

Description

Technical Field

[0001] The invention relates to the technical field of electric power equipment, and in particular to a low-voltage capacitor compensation cabinet which is convenient for heat dissipation and ventilation. Background Art

[0002] Low voltage capacitor compensation cabinet is a device used to improve the power factor of the power grid and reduce reactive power. Among them, low voltage usually refers to voltage below 1000 volts, and the most common voltage is 380 volts or 220 volts.

[0003] In the related art, a low-voltage capacitor compensation cabinet mainly includes a cabinet body and a cabinet door hinged on the cabinet body. A multi-layer mounting frame is arranged in the cabinet body, and electrical components such as capacitors, fuses or reactors are installed on each mounting frame. The electrical components in the cabinet body can be inspected and maintained conveniently by opening or closing the cabinet door.

[0004] At present, in order to dissipate the heat of electronic components in the low-voltage compensation cabinet, a ventilation structure is usually provided on the low-voltage compensation cabinet. During actual use, humid air from the outside will also enter the cabinet through the ventilation structure, which can easily cause damage to the electrical components in the cabinet. Summary of the invention

[0005] In order to prevent external humid air from entering the cabinet while ventilating and dissipating the heat of electrical components in the cabinet, thereby helping to ensure the service life of the electrical components in the cabinet, the present invention provides a low-voltage capacitor compensation cabinet that is easy to dissipate heat and ventilate.

[0006] The present invention provides a low-voltage capacitor compensation cabinet that is convenient for heat dissipation and ventilation and adopts the following technical solution:

[0007] A low-voltage capacitor compensation cabinet that is convenient for heat dissipation and ventilation comprises a cabinet body and a base, wherein the cabinet body is arranged on the base, an air inlet cavity is provided in the base, and the air inlet cavity is connected with the interior of the cabinet body, an air inlet port connected with the air inlet cavity is provided on the base, a filtering and dehumidifying assembly for filtering and dehumidifying the air entering the air inlet cavity is provided at the air inlet port, a heat dissipation fan is installed in the air inlet cavity, and an air outlet end of the heat dissipation fan is connected with the interior of the cabinet body, a vent is provided on the top of the cabinet body, and the vent is covered with a breathable membrane.

[0008] Preferably, a ventilation structure is provided on the top of the cabinet, and the ventilation structure includes a plurality of ventilation holes opened on the top of the cabinet, and an adjustment component for opening or closing the plurality of ventilation holes is provided on the cabinet.

[0009] Preferably, the adjustment component includes an adjustment plate slidably arranged on the cabinet and a transmission member arranged on the cabinet, the adjustment plate corresponding to the ventilation structure one-to-one, the sliding direction of the adjustment plate being perpendicular to the height direction of the cabinet, a plurality of adjustment holes being provided on the adjustment plate, the adjustment holes on the adjustment plate corresponding to the ventilation holes of the ventilation structure one-to-one, the surface area of ​​the breathable membrane close to the interior of the cabinet being larger than the cross-sectional area of ​​the vent, the breathable membrane is cylindrical, and the transmission member is used to drive the adjustment plate to slide when the breathable membrane expands so that the adjustment holes are close to the corresponding ventilation holes.

[0010] Preferably, the transmission member includes a transmission rod rotatably arranged on the cabinet, the rotation axis of the transmission rod is perpendicular to the sliding direction of the adjustment plate, the transmission rod corresponds to the adjustment plate one-to-one, the transmission rod is located between the corresponding adjustment plate and the breathable membrane, one end of the transmission rod is hinged to the corresponding breathable membrane, and the other end is hinged with a connecting rod, the end of the connecting rod away from the transmission rod is hinged to the corresponding adjustment plate, the hinge axes of the connecting rod and the transmission rod are both perpendicular to the sliding direction of the corresponding adjustment plate, and the end of the transmission rod close to the corresponding breathable membrane is inclined downward.

[0011] Preferably, a reset spring for pulling the adjustment plate for reset is provided on the cabinet, one end of the reset spring is provided on the cabinet, and the other end is provided on the adjustment plate, and when the reset spring is in a natural state, the adjustment hole on the adjustment plate and the corresponding ventilation hole are in a misaligned state.

[0012] Preferably, a limiting cylinder is provided on the cabinet body, the limiting cylinder corresponds to the breathable membrane one by one, the breathable membrane is located in the corresponding limiting cylinder, and a notch is provided on the limiting cylinder for the transmission rod to slide through.

[0013] Preferably, a rain shield is slidably provided on one side of the base close to the air inlet, and the sliding direction of the rain shield is parallel to the height direction of the cabinet. A sliding member is provided on the base, and the sliding member is used to adjust the rain shield to slide towards or away from the air inlet.

[0014] Preferably, the sliding member includes a rain collecting box arranged on the rain shield and a pushing spring arranged on the base, a through hole is opened on the side wall of the rain collecting box, and the pushing spring is used to push the rain shield up to move away from the air inlet. When the rain collecting box is empty, the rain shield is located above the air inlet.

[0015] Preferably, the filtering and dehumidifying assembly comprises a filtering layer and a dehumidifying layer arranged at the air inlet.

[0016] Preferably, a cabinet cover is arranged on the top of the cabinet body, and the cabinet cover is arranged on the cabinet body.

[0017] In summary, the present invention includes the following beneficial technical effects:

[0018] When in use, the heat generated by the electrical components inside the cabinet can be discharged through the breathable membrane. When the temperature inside the cabinet reaches the preset value, the heat dissipation fan is started. The heat dissipation fan transports the external air from the air inlet to the cabinet after being processed by the filtering and dehumidifying component. The air with heat in the cabinet is discharged from the breathable membrane at the vent. Since the humidity of the air processed by the filtering and dehumidifying component is low, and the hot air inside the breathable membrane can be discharged, the moisture in the external humid air is not easy to enter the cabinet. Therefore, the humid air from the outside is not easy to enter the cabinet under the condition of ventilation and heat dissipation, so that the electrical components in the cabinet are not easily damaged by moisture, which helps to ensure the service life of the electrical components in the cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present invention.

[0020] Figure 2 It is a sectional exploded view of the overall structure of Example 1 of the present invention.

[0021] Figure 3 It is a structural sectional exploded view of the cabinet top in Example 1 of the present invention.

[0022] Figure 4 yes Figure 3 Enlarged view of part A.

[0023] Figure 5 It is a schematic diagram of the structure inside the cabinet in Example 2 of the present invention.

[0024] Explanation of the accompanying drawings: 1. cabinet; 2. base; 3. air inlet chamber; 4. air inlet; 5. filter and dehumidification assembly; 51. filter layer; 52. dehumidification layer; 6. heat dissipation fan; 7. vent; 8. breathable membrane; 9. ventilation hole; 10. adjustment plate; 11. adjustment hole; 12. transmission rod; 13. connecting rod; 14. return spring; 15. limit cylinder; 16. notch; 17. rain shield; 18. sliding part; 181. rain collecting box; 182. push spring; 19. through hole; 20. cabinet cover; 21. support rod; 22. fixing block; 23. frame; 24. delivery pipeline; 25. nozzle; 26. support rod; 27. guide rail. DETAILED DESCRIPTION

[0025] The following combination Figure 1-Figure 5 The present invention is described in further detail.

[0026] Embodiment 1:

[0027] The embodiment of the present invention discloses a low-voltage capacitor compensation cabinet that is convenient for heat dissipation and ventilation. Figure 1 and Figure 2A low-voltage capacitor compensation cabinet for heat dissipation and ventilation includes a cabinet body 1 and a base 2, wherein the cabinet body 1 is fixedly mounted on the base 2, a frame 23 is fixed inside the cabinet body 1, and electrical components such as capacitors, fuses or reactors are mounted on the frame 23 in a vertical direction through a mounting frame; an air inlet cavity 3 is provided inside the base 2, an opening (not shown in the figure) is provided at the bottom of the cabinet body 1 to connect the air inlet cavity 3 with the interior of the cabinet body 1, an air inlet 4 connected with the air inlet cavity 3 is provided on the side wall of the base 2, and a filtering and dehumidifying component 5 for filtering and dehumidifying the air entering the air inlet cavity 3 is arranged at the air inlet 4; a heat dissipation fan 6 is fixedly mounted inside the air inlet cavity 3, and the heat dissipation fan 6 divides the air inlet cavity 3 into an upper and lower part, the upper part of the air inlet cavity 3 is connected with the interior of the cabinet body 1, the lower part of the air inlet cavity 3 is connected with the air inlet 4, and the air outlet end of the heat dissipation fan 6 is connected with the interior of the cabinet body 1.

[0028] Reference Figure 2 and Figure 3 The cabinet 1 has a vent 7 at the top, and the vent 7 is covered with a breathable membrane 8, so that the air inside the cabinet 1 can be discharged through the breathable membrane 8, but the moisture and impurities outside the cabinet 1 cannot pass through the breathable membrane 8. In the embodiment of the present invention, in order to improve the ventilation effect of the cabinet 1, a plurality of vents 7 are designed, and specifically, two vents 7 are symmetrically arranged along the top of the cabinet 1.

[0029] When in use, the heat generated by the electrical components inside the cabinet 1 can be discharged through the breathable membrane 8. When the temperature inside the cabinet 1 reaches a preset value, the heat dissipation fan 6 is started. The heat dissipation fan 6 draws external air from the air inlet 4 and transports it to the cabinet 1 after being treated by the filter and dehumidification component 5. The air with heat in the cabinet 1 is discharged from the breathable membrane 8 at the ventilation port 7. Since the humidity of the air treated by the filter and dehumidification component 5 is low, and the hot air inside the breathable membrane 8 can be discharged, and the moisture in the external humid air cannot enter the cabinet 1, while ensuring ventilation and heat dissipation, the external humid air is not easy to enter the cabinet 1, and the electrical components in the cabinet 1 are not easy to be damaged by moisture, which helps to ensure the service life of the electrical components in the cabinet 1.

[0030] Reference Figure 2 In order to facilitate filtering and dehumidifying the air passing through the air inlet 4, the filter dehumidification assembly 5 includes a filter layer 51 and a dehumidification layer 52. The filter layer 51 and the dehumidification layer 52 are both detachable at the air inlet 4 by bolts, and the dehumidification layer 52 is located on the side of the filter layer 51 close to the air inlet end of the heat dissipation fan 6, so that the air entering the air inlet cavity 3 first passes through the filter layer 51 and then passes through the dehumidification layer 52. Among them, the filter layer 51 can be in the form of a filter net, filter cotton, etc., and the dehumidification layer 52 can be dehumidification cotton.

[0031] Reference Figure 2A temperature sensor (not shown in the figure) is installed in the cabinet 1, and the temperature sensor and the heat dissipation fan 6 are both wirelessly connected to the external controller. During use, the temperature sensor detects the temperature value in the cabinet 1 and sends it to the external controller, which receives the temperature value and compares it with the preset value. When the temperature value detected by the temperature sensor is greater than the preset value, the external controller starts the heat dissipation fan 6 to dissipate heat in the cabinet 1 in time. The preset value is set according to actual needs.

[0032] Reference Figure 2 and Figure 3 Since the ventilation effect of the breathable membrane 8 is limited, in order to further improve the ventilation effect of the cabinet 1, a ventilation structure is arranged on the top of the cabinet 1. Two ventilation structures are arranged. The two ventilation structures correspond to the two breathable membranes 8 one by one. The two ventilation structures are located between the two breathable membranes 8. Each ventilation structure includes a plurality of ventilation holes 9 opened on the top of the cabinet 1. The ventilation holes 9 are connected with the inside of the cabinet 1. The cabinet 1 is provided with an adjustment component for opening or closing the plurality of ventilation holes 9 of the ventilation structure.

[0033] Reference Figure 2 and Figure 3 In order to facilitate opening or closing of the multiple ventilation holes 9 of the ventilation structure, the adjustment assembly includes an adjustment plate 10 and a transmission member. The adjustment plate 10 corresponds to the ventilation structure one by one. The adjustment plate 10 is slidably arranged on the cabinet 1. The sliding direction of the adjustment plate 10 is perpendicular to the height direction of the cabinet 1. Further, the sliding direction of the adjustment plate 10 is parallel to the arrangement direction of the two breathable membranes 8. The adjustment plate 10 covers the multiple ventilation holes 9 of the corresponding ventilation structure. The adjustment plate 10 is provided with multiple adjustment holes 11. The adjustment holes 11 on the adjustment plate 10 correspond to the ventilation holes 9 of the corresponding ventilation structure one by one. The surface area of ​​the breathable membrane 8 close to the inside of the cabinet 1 is larger than the cross-sectional area of ​​the vent 7. The breathable membrane 8 is cylindrical. A filter screen (not marked in the figure) is installed at the vent 7 to prevent the breathable membrane 8 from falling into the cabinet 1. The transmission member is arranged on the cabinet 1. The transmission member is used to drive the adjustment plate 10 to slide when the breathable membrane 8 expands so that the adjustment hole 11 is close to the corresponding vent 9.

[0034] Reference Figure 3 and Figure 4In order to facilitate the adjustment plate 10 to slide when the breathable membrane 8 expands so that the adjustment hole 11 is close to the corresponding ventilation hole 9, a support rod 21 is fixed on the cabinet 1, and the support rod 21 corresponds to the adjustment plate 10 one by one. The support rod 21 is located between the corresponding adjustment plate 10 and the breathable membrane 8, and the transmission member includes a transmission rod 12, and the transmission rod 12 corresponds to the adjustment plate 10 one by one. The transmission rod 12 is rotatably arranged on the corresponding support rod 21, and the rotation axis of the transmission rod 12 is perpendicular to the sliding direction of the adjustment plate 10, and the rotation axis of the transmission rod 12 is perpendicular to the height direction of the cabinet 1; the transmission rod 12 One end is hinged to the corresponding breathable membrane 8, and the other end is hinged with a connecting rod 13. The end of the connecting rod 13 away from the transmission rod 12 is hinged to the corresponding adjustment plate 10. The hinge axes of the connecting rod 13 and the transmission rod 12 are perpendicular to the sliding direction of the corresponding adjustment plate 10. The end of the transmission rod 12 close to the corresponding breathable membrane 8 is inclined downward, and the distance from the end of the transmission rod 12 close to the corresponding breathable membrane 8 to the support rod 21 is greater than the distance from the end of the transmission rod 12 close to the corresponding adjustment plate 10 to the support rod 21, so that it is more labor-saving when the transmission rod 12 rotates through the connecting rod 13 to push the corresponding adjustment plate 10.

[0035] When the heat dissipation fan 6 is not started, the breathable membrane 8 is flattened and pressed against the filter screen of the vent 7 under the action of gravity of the transmission rod 12, and the transmission rod 12 pulls the corresponding adjustment plate 10 through the connecting rod 13 to move toward the direction close to the corresponding breathable membrane 8, so that the adjustment hole 11 on the adjustment plate 10 is misaligned with the corresponding ventilation hole 9, thereby achieving the closure of the ventilation structure; when the heat dissipation fan 6 is started to dissipate heat, since the heat dissipation fan 6 continuously delivers external air into the cabinet 1, and the cabinet 1 has limited ventilation effect when the cabinet door is closed, the hot air in the cabinet 1 will drive the breathable membrane 8 to expand, and the breathable membrane 8 expands. During the expansion process, the end of the transmission rod 12 away from the connecting rod 13 will be driven to push up, and the end of the transmission rod 12 close to the corresponding connecting rod 13 will be pressed downward, so that the transmission rod 12 abuts against the corresponding connecting rod 13, and the end of the connecting rod 13 away from the corresponding transmission rod 12 moves in the direction away from the corresponding breathable membrane 8, so that the adjustment hole 11 on the adjustment plate 10 is gradually aligned with the corresponding ventilation hole 9. At this time, the ventilation structure is turned on, and a large amount of hot air in the cabinet 1 can be discharged through the ventilation hole 9. Since the gas flow at the ventilation hole 9 is always toward the outside of the cabinet 1 at this time, dust, impurities, and humid air will not enter the cabinet 1.

[0036] When the temperature in the cabinet 1 returns to below the preset value and the heat dissipation fan 6 stops working, the force of the air on the breathable membrane 8 is reduced, and the breathable membrane 8 is flattened again under the gravity of the transmission rod 12. The transmission rod 12 pulls the corresponding adjustment plate 10 through the connecting rod 13 to move toward the direction close to the corresponding breathable membrane 8, so that the adjustment hole 11 on the adjustment plate 10 is misaligned with the corresponding ventilation hole 9, thereby achieving the closure of the ventilation structure and ensuring that humid air and dust impurities are not easy to enter the cabinet 1.

[0037] Reference Figure 3 and Figure 4 The top wall of the cabinet 1 is fixed with a fixed block 22, which corresponds to the adjustment plate 10 one by one. The fixed block 22 is located between the corresponding adjustment plate 10 and the support rod 21. A reset spring 14 is fixed between the fixed block 22 and the corresponding adjustment plate 10 for pulling the adjustment plate 10 to reset. The extension direction of the reset spring 14 is parallel to the sliding direction of the adjustment plate 10. When the reset spring 14 is in a natural state, the adjustment hole 11 on the adjustment plate 10 is misaligned with the corresponding ventilation hole 9; the force of the expansion of the air-permeable membrane 8 is greater than the elastic force of the reset spring 14, so as to ensure that the air-permeable membrane 8 can successfully lift up one end of the transmission rod 12 away from the corresponding adjustment plate 10 when it expands. The setting of the reset spring 14 helps to ensure that the adjustment plate 10 and the transmission rod 12 are restored to the closed state of the ventilation structure.

[0038] Reference Figure 3 and Figure 4 A limiting cylinder 15 is fixed on the cabinet 1, and the limiting cylinder 15 corresponds to the breathable membrane 8 one by one. The breathable membrane 8 is located in the corresponding limiting cylinder 15, wherein the limiting cylinder 15 is hollowed out so as not to affect the heat dissipation and ventilation effect of the breathable membrane 8; a notch 16 for the transmission rod 12 to slide through is provided on the side of the limiting cylinder 15 close to the corresponding adjustment plate 10. The setting of the limiting cylinder 15 helps to guide the expansion of the breathable membrane 8, so that the breathable membrane 8 is not easy to bend during the expansion process, so as to successfully lift up the end of the transmission rod 12 close to the breathable membrane 8.

[0039] Reference Figure 2 and Figure 3 A cabinet cover 20 is mounted on the top of the cabinet body 1 through a plurality of support rods 26. The cabinet cover 20 is in the shape of a rectangular box with an opening facing downward. The cabinet cover 20 is arranged above the cabinet body 1. The lower edge of the cabinet cover 20 is lower than the upper surface of the cabinet body 1. The inner surface of the cabinet cover 20 is at a certain distance from the outer surface of the cabinet body 1, thereby effectively shielding the vents 7 and the vents 9, making it difficult for rainwater and impurities to enter the cabinet body 1. The cabinet body 1 can meet the requirements of being installed indoors and outdoors.

[0040] Reference Figure 1 and Figure 2 Two guide rails 27 are relatively fixed on one side of the base 2 close to the air inlet 4. The guide rails 27 are arranged in the vertical direction. The air inlet 4 is located between the two guide rails 27. A rain shield 17 is slidably arranged between the two guide rails 27. The rain shield 17 is in an inverted L shape. The rain shield 17 abuts against the outer wall of the base 2 to prevent rainwater from flowing toward the air inlet 4. The sliding direction of the rain shield 17 is parallel to the height direction of the cabinet 1. A sliding member 18 is arranged on the base 2. The sliding member 18 is used to adjust the rain shield 17 to slide toward or away from the air inlet 4.

[0041] Reference Figure 1 and Figure 2In order to facilitate the adjustment of the rain shield 17 to slide towards or away from the air inlet 4, the sliding member 18 includes a rain collecting box 181 and a pushing spring 182. The rain collecting box 181 is fixedly arranged at the upper end of the rain shield 17, the rain collecting box 181 is in contact with the outer wall of the base 2, and a through hole 19 is opened on the side wall away from the cabinet 1. The diameter of the through hole 19 is 1mm. The pushing spring 182 corresponds to the guide rail 27 one by one. One end of the pushing spring 182 is fixed on the top wall of the rain shield 17, and the other end is fixed on the protrusion of the outer wall of the base 2. The pushing spring 182 is used to push the rain shield 17 to move upward away from the air inlet 4. When the rain collecting box 181 is empty, the rain shield 17 is located above the air inlet 4.

[0042] The low-pressure compensation cabinet is installed outdoors. When the rain collecting box 181 is empty, the rain shield 17 is located above the air inlet 4 under the elastic force of the push spring 182, so as not to affect the air intake effect at the air inlet 4. When it rains, rainwater will enter the rain collecting box 181 along the outer wall of the cabinet 1. Since the diameter of the through hole 19 is small, the rainwater in the rain collecting box 181 will continue to accumulate. As the gravity in the rain collecting box 181 increases, the rain collecting box 181 will drive the rain shield 17 to move downward to squeeze the push spring 182, and then the rain shield 17 gradually blocks the air inlet 4, so that it is not easy for rainwater to enter the base 2 from the air inlet 4. Since the low-pressure compensation cabinet is usually installed on a concrete seat higher than the ground, rainwater on the ground usually does not enter the air inlet 4.

[0043] The implementation principle of Example 1 of the present invention is: when in use, the heat generated by the electrical components inside the cabinet 1 can be discharged through the breathable membrane 8. At this time, under the action of gravity of the transmission rod 12 and the elastic force of the return spring 14, the breathable membrane 8 is flattened, and the transmission rod 12 will pull the corresponding adjustment plate 10 through the connecting rod 13 to move in the direction close to the corresponding breathable membrane 8, so that the adjustment hole 11 on the adjustment plate 10 is misaligned with the corresponding ventilation hole 9, and the ventilation structure is in a closed state.

[0044] When the temperature value detected by the temperature sensor is greater than the preset value, the external controller drives the heat dissipation fan 6 to start, and the heat dissipation fan 6 draws external air from the air inlet 4 and delivers it to the cabinet 1 after being processed by the filter layer 51 and the dehumidification layer 52. The hot air in the cabinet 1 is discharged from the breathable membrane 8 at the vent 7. When the cabinet door of the cabinet 1 is closed, the ventilation effect of the breathable membrane 8 is limited. Then the hot air in the cabinet 1 will drive the breathable membrane 8 to expand. During the expansion of the breathable membrane 8, the end of the transmission rod 12 away from the connecting rod 13 will be driven to push up, so that the end of the transmission rod 12 close to the corresponding connecting rod 13 is pressed downward, and then the transmission rod 12 abuts against the corresponding connecting rod 13, so that the end of the connecting rod 13 away from the corresponding transmission rod 12 moves away from the corresponding breathable membrane. 8 moves, so that the connecting rod 13 drives the adjusting plate 10 to slide in the direction away from the corresponding breathable membrane 8, so that the adjusting hole 11 on the adjusting plate 10 is gradually aligned with the corresponding breathable hole. At this time, the ventilation structure is opened, and a large amount of hot air in the cabinet 1 can be discharged through the ventilation hole 9. Since the gas flow direction at the ventilation hole 9 is always toward the outside of the cabinet 1 at this time, dust, impurities, and humid air will not enter the cabinet 1, and the air humidity treated by the filtering and dehumidifying component 5 is small, and the moisture in the external humid air is not easy to enter the cabinet 1. Therefore, under the condition of ensuring ventilation and heat dissipation, it is not easy for the external humid air to enter the cabinet 1, and the electrical components in the cabinet 1 are not easily damaged by moisture, which helps to ensure the service life of the electrical components in the cabinet 1.

[0045] When the temperature in the cabinet 1 returns to below the preset value and the heat dissipation fan 6 stops working, the force of the air on the breathable membrane 8 decreases, and under the gravity of the transmission rod 12 and the elastic force of the return spring 14, the transmission rod 12 pulls the corresponding adjustment plate 10 through the connecting rod 13 to move a certain distance toward the direction close to the corresponding breathable membrane 8. The adjustment hole 11 on the adjustment plate 10 is misaligned with the corresponding ventilation hole 9, so as to achieve the closure of the ventilation structure and ensure that humid air and dust impurities are not easy to enter the cabinet 1.

[0046] Embodiment 2:

[0047] Reference Figure 2 and Figure 5 The difference between this embodiment and the embodiment 1 is that a delivery pipe 24 is fixed on the frame 23, the delivery pipe 24 corresponds to the vent 7 one by one, the lower end of the delivery pipe 24 is aligned with the opening in the cabinet 1 that is connected to the air inlet cavity 3, and the upper end of the delivery pipe 24 is aligned with the corresponding vent 7. In order to improve the heat dissipation effect of the electrical components in the middle of the cabinet 1, a plurality of nozzles 25 are connected to the delivery pipe 24, and the nozzles 25 are aligned with the electrical components in the middle of the cabinet 1, so that part of the air in the delivery pipe 24 can be directly blown to the electrical components in the middle.

[0048] The implementation principle of the second embodiment of the present invention is that part of the air blown out by the heat dissipation fan 6 can directly enter the delivery pipe 24 and spray toward the corresponding breathable membrane 8 to ensure that the breathable membrane 8 can expand.

[0049] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-voltage capacitor compensation cabinet that facilitates heat dissipation and ventilation, comprising a cabinet body (1), characterized in that: The cabinet (1) further comprises a base (2), wherein the cabinet (1) is arranged on the base (2), an air inlet cavity (3) is provided in the base (2), the air inlet cavity (3) is communicated with the interior of the cabinet (1), an air inlet port (4) is provided on the base (2) and is communicated with the air inlet cavity (3), a filtering and dehumidifying assembly (5) for filtering and dehumidifying the air entering the air inlet cavity (3) is provided at the air inlet port (4), a heat dissipation fan (6) is installed in the air inlet cavity (3), the air outlet end of the heat dissipation fan (6) is communicated with the interior of the cabinet (1), a vent (7) is provided on the top of the cabinet (1), the vent (7) is covered with a breathable film (8), a ventilation structure is provided on the top of the cabinet (1), the ventilation structure comprises a plurality of ventilation holes (9) provided on the top of the cabinet (1), and a ventilation hole (9) on the cabinet (1) is provided on the top of the cabinet (1). An adjustment component for opening or closing a plurality of ventilation holes (9) is provided, the adjustment component comprising an adjustment plate (10) slidably arranged on the cabinet (1) and a transmission member arranged on the cabinet (1), the adjustment plate (10) corresponding to the ventilation structure one by one, the sliding direction of the adjustment plate (10) being perpendicular to the height direction of the cabinet (1), the adjustment plate (10) being provided with a plurality of adjustment holes (11), the adjustment holes (11) on the adjustment plate (10) corresponding to the ventilation holes (9) of the ventilation structure one by one, the surface area of ​​the air permeable membrane (8) close to the inside of the cabinet (1) being larger than the cross-sectional area of ​​the ventilation opening (7), the air permeable membrane (8) being cylindrical, and the transmission member being used to drive the adjustment plate (10) to slide when the air permeable membrane (8) expands so that the adjustment holes (11) are close to the corresponding ventilation holes (9).

2. A low-voltage capacitor compensation cabinet that facilitates heat dissipation and ventilation according to claim 1, characterized in that: The transmission member comprises a transmission rod (12) rotatably arranged on the cabinet (1), the rotation axis of the transmission rod (12) is perpendicular to the sliding direction of the adjustment plate (10), the transmission rod (12) corresponds to the adjustment plate (10) one by one, the transmission rod (12) is located between the corresponding adjustment plate (10) and the breathable membrane (8), one end of the transmission rod (12) is hinged to the corresponding breathable membrane (8), and the other end is hinged to a connecting rod (13), the end of the connecting rod (13) away from the transmission rod (12) is hinged to the corresponding adjustment plate (10), the hinge axes of the connecting rod (13) and the transmission rod (12) are both perpendicular to the sliding direction of the corresponding adjustment plate (10), and the end of the transmission rod (12) close to the corresponding breathable membrane (8) is inclined downward.

3. A low-voltage capacitor compensation cabinet that facilitates heat dissipation and ventilation according to claim 2, characterized in that: The cabinet (1) is provided with a reset spring (14) for pulling the adjustment plate (10) for reset; one end of the reset spring (14) is provided on the cabinet (1) and the other end is provided on the adjustment plate (10); when the reset spring (14) is in a natural state, the adjustment hole (11) on the adjustment plate (10) and the corresponding ventilation hole (9) are in a misaligned state.

4. A low-voltage capacitor compensation cabinet that facilitates heat dissipation and ventilation according to claim 1, characterized in that: The cabinet (1) is provided with a limiting cylinder (15), the limiting cylinder (15) corresponds to the air permeable membrane (8) one by one, the air permeable membrane (8) is located in the corresponding limiting cylinder (15), and the limiting cylinder (15) is provided with a notch (16) for the transmission rod (12) to slide through.

5. A low-voltage capacitor compensation cabinet that facilitates heat dissipation and ventilation according to claim 1, characterized in that: A rain shield (17) is slidably provided on one side of the base (2) close to the air inlet (4); the sliding direction of the rain shield (17) is parallel to the height direction of the cabinet (1); a sliding member (18) is provided on the base (2); the sliding member (18) is used to adjust the rain shield (17) to slide in a direction close to or away from the air inlet (4).

6. A low-voltage capacitor compensation cabinet that facilitates heat dissipation and ventilation according to claim 5, characterized in that: The sliding member (18) comprises a rain collecting box (181) arranged on the rain shield (17) and a pushing spring (182) arranged on the base (2); a through hole (19) is provided on the side wall of the rain collecting box (181); the pushing spring (182) is used to push the rain shield (17) upward to move away from the air inlet (4); when the rain collecting box (181) is empty, the rain shield (17) is located above the air inlet (4).

7. A low-voltage capacitor compensation cabinet that facilitates heat dissipation and ventilation according to claim 1, characterized in that: The filtering and dehumidifying component (5) comprises a filtering layer (51) and a dehumidifying layer (52) arranged at the air inlet (4).

8. A low-voltage capacitor compensation cabinet that facilitates heat dissipation and ventilation according to any one of claims 1 to 7, characterized in that: A cabinet cover (20) is mounted on the top of the cabinet body (1), and the cabinet cover (20) is mounted on the cabinet body (1).

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