A dust-proof capacitor housing
By introducing filter mechanism, sealing components, heat dissipation components and power supply components into the capacitor housing, the problem of dust entering the dust-proof capacitor housing when the shell cover is opened and closed is solved, and the heat dissipation efficiency is improved, achieving efficient dust filtration and rapid heat dissipation.
Patent Information
- Application Number
- CN202211300700.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-10-24
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2042-10-24
AI Technical Summary
The existing dust-proof capacitor housing cannot effectively prevent dust from entering when the cover is opened and closed, and the heat dissipation efficiency is low.
A capacitor housing including a filter mechanism, a sealing assembly, a heat dissipation assembly and a power supply assembly is designed to realize dust filtration and rapid heat dissipation through internal circulation air flow, electrostatic dust removal and external circulation coolant heat dissipation.
It realizes effective dust protection and efficient heat dissipation, enhances dust filtration effect and heat dissipation performance, and improves dust protection and heat dissipation efficiency.
Smart Images

Figure CN115775685B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of capacitors, in particular to a dustproof capacitor housing. Background Art
[0002] Capacitors are usually referred to as capacitors. As the name suggests, they are containers for storing electricity and are devices that hold charge. Capacitors are one of the electronic components used in large quantities in electronic equipment. They are widely used in circuits for DC isolation, AC passing, coupling, bypassing, filtering, tuning circuits, energy conversion, control, etc. After searching, the invention patent with publication number CN111863443A discloses a dust-proof capacitor housing, including a capacitor housing, wherein a slide groove is provided on the upper surface of the capacitor housing. The dust-proof capacitor housing can be pulled out of the closing plate inside the slot, and then the capacitor inside the capacitor housing can be dissipated while being dust-proof. The dust-proof plate can be removed from the inside of the shell cover through the fixing plate for cleaning, and then the closing plate is inserted into the inside of the slot to seal the capacitor housing to prevent dust from entering.
[0003] Although the device has the above advantages, when realizing the above features, the inventors found that the device dissipates heat and prevents dust by pulling out the closing plate and exposing the interior of the shell through the slot. First, the dustproof plate provided by the device can only prevent dust after the closing plate is pulled out, but when the shell cover is opened and closed, it cannot prevent dust from entering the interior of the shell, resulting in the dustproof plate only being able to passively prevent dust. Therefore, the dustproof effect of the dustproof plate is limited. At the same time, natural heat dissipation by exposing the interior of the shell is also passive heat dissipation, and its heat dissipation efficiency is low. Therefore, it is necessary to solve the above problems. Summary of the Invention
[0004] In response to the shortcomings of the existing technology, the present invention provides a dust-proof capacitor housing, which solves the problem that when the dust-proof capacitor housing is used, the dust-proof plate provided therein can only perform passive dust protection and cannot protect against dust caused by the opening and closing of the shell cover, and its dust-proof effect is limited. At the same time, the heat is naturally dissipated through the exposed interior of the shell, resulting in low heat dissipation efficiency.
[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a dustproof capacitor housing, comprising a frame, a filter mechanism is provided on the top of the frame, the filter mechanism comprises a drawer, the drawer is provided on the top of the frame, the drawer is connected to the frame through a sealing component, the inner wall of the drawer is fixedly connected to two mutually nested rings, the outside of the outer rings is provided with a heat dissipation component, the inner wall of the outer ring is fixedly connected to a guide plate, the outer surface of the guide plate is fixedly connected to an electrolytic column, the outside of the electrolytic column is provided with a Power supply component, the outer surface of the inner ring is fixedly connected with an adsorption plate, the adsorption plate and the guide plate are arranged in a mirror-image staggered manner, a through air inlet is provided at the bottom of the drawer, the air inlet is located between the two rings, a through air outlet is provided inside the drawer, the air outlet is located between the inner walls of the inner ring, the inner wall of the air outlet is fixedly connected with a filter, a through guide groove is provided at the bottom of the inner ring, a filter cover is fixedly connected to the edge of the guide groove and the outer surface of the inner ring, and a fan is provided between the inner walls of the inner ring.
[0006] Preferably, the sealing assembly includes a top cover and a sealing groove, the sealing groove is opened at the top of the outer ring, the bottom of the top cover is fixedly connected to the bottom of the frame, the outer surface of the top cover is opened with a connecting groove, and the outer surface of the drawer is movably connected to the inner surface of the connecting groove.
[0007] Preferably, a through groove is provided at the bottom of the inner surface of the connecting groove, and the inner surface of the through groove is respectively connected to the air inlet, the air outlet and the inner surface of the frame. A through circular groove is provided at the top of the inner surface of the connecting groove, and the inner surface of the circular groove is movably connected to a circular plate.
[0008] Preferably, the bottom of the circular plate is fixedly connected to the top of the fan, and the bottom of the circular plate is movably connected to the tops of the two circular rings respectively. The bottom of the circular plate is fixedly connected to a sealing ring, and the outer surface of the sealing ring is movably connected to the inner surface of the sealing groove. A screw is movably connected through the interior of the circular plate, and the outer surface of the screw is embedded in the top of the inner circular ring and connected by a thread.
[0009] Preferably, the heat dissipation component includes a water tank, the outer surface of the water tank is fixedly connected to the inner wall of the drawer, and the two sides of the interior of the water tank are respectively penetrated by a water inlet pipe and a water outlet pipe, the interiors of the water inlet pipe and the water outlet pipe are penetrated and connected with the interior of the outer circular ring, the outer surface of the water tank is fixedly connected to a semiconductor refrigeration plate, and the outer surface of the semiconductor refrigeration plate is penetrated and fixedly connected with the interior of the drawer.
[0010] Preferably, the power supply component includes an electrostatic generator and a slide, the outer surface of the electrostatic generator is fixedly connected to the inner wall of the drawer, the outer surface of the slide is fixedly connected to the inner wall of the drawer, a slide groove is provided on the top of the slide, the inner surface of the slide groove is fixedly connected to a resistor plate, the outer surface of the resistor plate is slidably connected to a slider, and the outer surface of the slider is slidably connected to the inner surface of the slide groove.
[0011] Preferably, the output ends of the slider and the slide plate are electrically connected to the input end of the electrostatic generator, the input end of the electrolytic column is electrically connected to the output end of the electrostatic generator, and the input end of the adsorption plate is electrically connected to the output end of the electrostatic generator.
[0012] Preferably, a rack is fixedly connected to the top of the slider, the outer surface of the rack is slidably connected to the inner surface of the slide groove, the outer surface of the rack is slidably connected to the inside of the skateboard, the top of the skateboard is embedded and fixedly connected to a drive motor, the output end of the drive motor is fixedly connected to a gear, and the outer surface of the gear is meshed with the outer surface of the rack.
[0013] Beneficial effects
[0014] The present invention provides a dustproof capacitor housing. Compared with the prior art, it has the following advantages:
[0015] (1) By setting up a filtering mechanism, the air inside the shell is drawn by the rotation of the fan, and at the same time, through the space surrounded by the ring, and in conjunction with the air inlet and outlet, the air inside the shell can be circulated internally, which can not only quickly dissipate heat, but also avoid contact with the outside world to generate a large amount of dust. In the process of air internal circulation, the adsorption plate and the filter cover can filter the dust to achieve the purpose of dust prevention and heat dissipation. At the same time, the arrangement of the guide plate and the adsorption plate increases the distance of the flow channel, thereby enhancing the effect of dust filtering and accommodating more dust.
[0016] (2) By providing a sealing component, the drawer and the frame are connected together, thereby enhancing the stability of the drawer and the sealing between the inner and outer rings, making it easier to filter dust in the air and also easier to pull out the drawer, so as to facilitate the subsequent unified cleaning of dust.
[0017] (3) By setting up a heat dissipation component, the water tank is connected to the inside of the outer ring through the water inlet pipe and the water outlet pipe, so that the coolant inside the water tank forms an external circulation to cool the outer ring. When the air circulates internally, it can exchange heat with the outer ring to achieve rapid heat dissipation of the capacitor. At the same time, the semiconductor refrigeration plate can exchange heat between the coolant and the outside world to avoid the problem of the coolant absorbing a large amount of heat and its heat dissipation performance being reduced, resulting in limited heat dissipation of the capacitor.
[0018] (4) By setting up a power supply component, the positive and negative poles of the electrostatic generator are electrically connected to the adsorption plate and the electrolytic column respectively. The dust is electrolyzed by the electrolytic column and adsorbed by the adsorption plate. By cooperating with the filtering of the filter cover, the filtration efficiency is improved, the dust prevention effect is enhanced, and the dust prevention amount is increased. At the same time, the slider and the resistor plate can form a sliding resistor, so that the power of the electrostatic generator can be adjusted according to the actual dust prevention needs. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a three-dimensional diagram of the external structure of the present invention;
[0020] Figure 2 A three-dimensional diagram of the external structure of the top cover of the present invention;
[0021] Figure 3 This is a disassembled diagram of the external structure of the circular plate of the present invention;
[0022] Figure 4 This is a disassembled diagram of the external structure of the ring of the present invention;
[0023] Figure 5 This is a disassembled view of the internal structure of the skateboard of the present invention.
[0024] In the figure: 1. frame; 2. drawer; 3. sealing assembly; 31. top cover; 32. sealing groove; 33. connecting groove; 34. through groove; 35. circular groove; 36. circular plate; 37. sealing ring; 38. screw; 4. circular ring; 5. heat dissipation assembly; 51. water tank; 52. water inlet pipe; 53. water outlet pipe; 54. semiconductor refrigeration plate; 6. guide plate; 7. electrolytic column; 8. power supply assembly; 81. electrostatic generator; 82. slide plate; 83. slide groove; 84. resistor plate; 85. slider; 86. rack; 87. drive motor; 88. gear; 9. adsorption plate; 10. air inlet; 11. air outlet; 12. filter; 13. guide groove; 14. filter cover; 15. fan. DETAILED DESCRIPTION
[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0026] See also Figure 1-5The present invention provides a technical solution: a dust-proof capacitor housing, comprising a frame 1, a filtering mechanism is provided on the top of the frame 1, all electrical accessories inside the device are electrically connected to the external control circuit, the filtering mechanism comprises a drawer 2, the drawer 2 is insulated, the drawer 2 is arranged on the top of the frame 1, the drawer 2 is connected to the frame 1 through a sealing component 3, the inner wall of the drawer 2 is fixedly connected to two mutually nested rings 4, the outside of the outer ring 4 is provided with a heat dissipation component 5, the inner wall of the outer ring 4 is fixedly connected to a guide plate 6, the outer surface of the guide plate 6 is fixedly connected to an electrolytic column 7, the outside of the electrolytic column 7 is provided with a power supply component 8, the outer surface of the inner ring 4 is fixedly connected to an adsorption plate 9, the adsorption plate 9 and the guide plate 6 are mirror-imaged, a through air inlet 10 is provided at the bottom of the drawer 2, the air inlet 10 is located between the two rings 4, a through air outlet 11 is provided inside the drawer 2, and the air outlet 11 is located on the inner ring 4 The filter screen 12 is fixedly connected to the inner wall of the air outlet 11 between the inner walls, and a through guide groove 13 is provided at the bottom of the inner ring 4. The guide groove 13 is close to the air inlet 10, and the two are separated by a partition. The edge of the guide groove 13 and the outer surface of the inner ring 4 are fixedly connected with a filter cover 14. A fan 15 is provided between the inner walls of the inner ring 4. By setting a filtering mechanism, the fan 15 rotates to extract the air inside the shell and flows through the space surrounded by the ring 4, and cooperates with the air inlet 10 and the air outlet 11, so that the air inside the shell can be circulated internally, which can not only dissipate heat quickly, but also avoid contact with the outside world and generate a large amount of dust. In the process of air circulation, the adsorption plate 9 and the filter cover 14 can filter dust to achieve the purpose of dust prevention and heat dissipation. At the same time, the arrangement of the guide plate 6 and the adsorption plate 9 increases the distance of the flow channel, thereby enhancing the effect of dust filtering and accommodating more dust.
[0027] The sealing assembly 3 includes a top cover 31 and a sealing groove 32. The sealing groove 32 is opened at the top of the outer ring 4. The bottom of the top cover 31 is fixedly connected to the bottom of the frame 1. A connecting groove 33 is opened on the outer surface of the top cover 31. The outer surface of the drawer 2 is movably connected to the inner surface of the connecting groove 33.
[0028] A through groove 34 is provided at the bottom of the inner surface of the connecting groove 33, and the inner surface of the through groove 34 is respectively connected to the air inlet 10, the air outlet 11 and the inner surface of the frame 1. A through circular groove 35 is provided at the top of the inner surface of the connecting groove 33, and a circular plate 36 is movably connected to the inner surface of the circular groove 35, and the circular plate 36 has insulating properties.
[0029] The bottom of the circular plate 36 is fixedly connected to the top of the fan 15, and the bottom of the circular plate 36 is movably connected to the tops of the two circular rings 4 respectively. A sealing ring 37 is fixedly connected to the bottom of the circular plate 36, and the outer surface of the sealing ring 37 is movably connected to the inner surface of the sealing groove 32. A screw 38 is movably connected through the interior of the circular plate 36, and the outer surface of the screw 38 is embedded in the top of the inner circular ring 4 through a threaded connection. By providing the sealing assembly 3, the drawer 2 and the frame 1 are connected together, which enhances the stability of the drawer 2 and the sealing between the inner and outer circular rings 4, facilitates the filtering of dust in the air, and also facilitates the pulling and drawing of the drawer 2, so as to facilitate the subsequent unified cleaning of dust.
[0030] The heat dissipation component 5 includes a water tank 51, and a coolant and a pump are provided inside the water tank 51. The output end of the pump is connected to one end of the water outlet pipe 53. The outer surface of the water tank 51 is fixedly connected to the inner wall of the drawer 2. The two sides of the water tank 51 are connected with the water inlet pipe 52 and the water outlet pipe 53 respectively. The interior of the water inlet pipe 52 and the water outlet pipe 53 are connected with the interior of the outer ring 4. The outer ring 4 is hollow. The outer surface of the water tank 51 is fixedly connected with a semiconductor cooling plate 54. The outer surface of the semiconductor cooling plate 54 is connected to the inner wall of the drawer 2. The interior of the drawer 2 is fixedly connected through the heat dissipation component 5, and the water tank 51 is connected to the interior of the outer ring 4 through the water inlet pipe 52 and the water outlet pipe 53, so that the coolant inside the water tank 51 forms an external circulation to cool the outer ring 4. When the air circulates internally, it can exchange heat with the outer ring 4 to achieve rapid heat dissipation of the capacitor. At the same time, the semiconductor refrigeration plate 54 can exchange heat between the coolant and the outside world to avoid the problem of reduced heat dissipation performance of the coolant after absorbing a large amount of heat, resulting in limited heat dissipation of the capacitor.
[0031] The power supply component 8 includes an electrostatic generator 81 and a slide 82. The model of the electrostatic generator 81 is ESD61002TA. The outer surface of the electrostatic generator 81 is fixedly connected to the inner wall of the drawer 2. The outer surface of the slide 82 is fixedly connected to the inner wall of the drawer 2. A slide groove 83 is provided on the top of the slide 82. The inner surface of the slide groove 83 is fixedly connected to a resistor plate 84. The outer surface of the resistor plate 84 is slidably connected to a slider 85. The outer surface of the slider 85 is slidably connected to the inner surface of the slide groove 83.
[0032] The output ends of the slider 85 and the slide plate 82 are electrically connected to the input end of the electrostatic generator 81, the input end of the electrolytic column 7 is electrically connected to the output end of the electrostatic generator 81, and the input end of the adsorption plate 9 is electrically connected to the output end of the electrostatic generator 81.
[0033] The top of the slider 85 is fixedly connected with a rack 86, and the outer surface of the rack 86 is slidably connected to the inner surface of the slide 83. The outer surface of the rack 86 is slidably connected to the inside of the slider 82. The top of the slider 82 is embedded and fixedly connected with a drive motor 87. The drive motor 87 is made of a servo motor. The output end of the drive motor 87 is fixedly connected with a gear 88. The outer surface of the gear 88 is meshed with the outer surface of the rack 86. By setting the power supply component 8, the positive and negative poles of the electrostatic generator 81 are electrically connected to the adsorption plate 9 and the electrolytic column 7 respectively. The dust is electrolyzed by the electrolytic column 7 and adsorbed by the adsorption plate 9. By cooperating with the filtration of the filter cover 14, the filtration efficiency is improved, the dust prevention effect is enhanced and the dust prevention amount is increased. At the same time, the slider 85 and the resistor plate 84 can form a sliding resistor, so that the power of the electrostatic generator 81 can be adjusted according to the actual dust prevention needs.
[0034] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.
[0035] During operation, the fan 15 rotates to extract air from the housing. The air enters the space between the two rings 4 through the air inlet 10, and flows under the guidance of the guide plate 6 and the adsorption plate 9. Then, the air passes through the guide groove 13 and enters the inner wall of the inner ring 4. Finally, it enters the housing through the air outlet 11, forming an internal circulation. During the air circulation process, the air is filtered and cooled at the same time.
[0036] Dust filtration: When the air circulates between the two rings 4, the positive and negative poles of the electrostatic generator 81 are electrically connected to the adsorption plate 9 and the electrolytic column 7 respectively. The dust in the air is electrolyzed by the electrolytic column 7 to obtain negative electrons. Since the adsorption plate 9 contains positrons, the dust is adsorbed on the adsorption plate 9 through the electromagnetic field between the positive and negative electrons, and double filtration can be formed in conjunction with the filter cover 14. At the same time, during the electrostatic dust removal process, according to actual needs, the driving motor 87 drives the gear 88 to rotate, so that the rack 86 drives the slider 85 to slide inside the slide groove 83 to change the relative position between the slider 85 and the resistor plate 84, thereby changing the power of the electrostatic generator 81.
[0037] Air cooling: When the air circulates internally, it contacts the outer ring 4. At the same time, the pump inside the water tank 51 pumps the coolant into the outer ring 4 through the outlet pipe 53, and enters the water tank 51 through the inlet pipe 52, forming an external circulation of the coolant. The coolant and the air exchange heat, so that the low-temperature air dissipates heat and cools the capacitor inside the shell. At the same time, the semiconductor refrigeration plate 54 is energized, and its cold end cools the coolant through the water tank 51, and dissipates heat from its hot end through the external environment, so as to achieve continuous heat dissipation of the capacitor by the coolant.
[0038] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.
[0039] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.
Claims
1. A dustproof capacitor housing, comprising a frame (1), characterized in that: The top of the frame (1) is provided with a filter mechanism, and the filter mechanism comprises a drawer (2), the drawer (2) is provided at the top of the frame (1), the drawer (2) is connected to the frame (1) via a sealing assembly (3), the inner wall of the drawer (2) is fixedly connected with two mutually fitting circular rings (4), the outside of the outer circular rings (4) is provided with a heat dissipation assembly (5), the inner wall of the outer circular rings (4) is fixedly connected with a guide plate (6), the outer surface of the guide plate (6) is fixedly connected with an electrolytic column (7), the outside of the electrolytic column (7) is provided with a power supply assembly (8), the outer surface of the inner circular ring (4) is fixedly connected with an adsorption plate (9), and the inner surface of the inner circular ring (4) is fixedly connected with a heat dissipation assembly (5). The adsorption plate (9) and the guide plate (6) are arranged in a mirror-image dislocation. A through air inlet (10) is provided at the bottom of the drawer (2). The air inlet (10) is located between the two circular rings (4). A through air outlet (11) is provided inside the drawer (2). The air outlet (11) is located between the inner walls of the inner circular ring (4). A filter screen (12) is fixedly connected to the inner wall of the air outlet (11). A through guide groove (13) is provided at the bottom of the inner circular ring (4). A filter cover (14) is fixedly connected to the edge of the guide groove (13) and the outer surface of the inner circular ring (4). A fan (15) is provided between the inner walls of the inner circular ring (4).
2. The dustproof capacitor housing according to claim 1, characterized in that: The sealing assembly (3) comprises a top cover (31) and a sealing groove (32); the sealing groove (32) is provided on the top of the outer ring (4); the bottom of the top cover (31) is fixedly connected to the bottom of the frame (1); a connecting groove (33) is provided on the outer surface of the top cover (31); and the outer surface of the drawer (2) is movably connected to the inner surface of the connecting groove (33).
3. The dustproof capacitor housing according to claim 2, characterized in that: A through groove (34) is provided at the bottom of the inner surface of the connecting groove (33), and the inner surface of the through groove (34) is respectively connected to the air inlet (10), the air outlet (11) and the inner surface of the frame (1). A through circular groove (35) is provided at the top of the inner surface of the connecting groove (33), and a circular plate (36) is movably connected to the inner surface of the circular groove (35).
4. The dustproof capacitor housing according to claim 3, characterized in that: The bottom of the circular plate (36) is fixedly connected to the top of the fan (15), and the bottom of the circular plate (36) is movably connected to the tops of the two circular rings (4). The bottom of the circular plate (36) is fixedly connected to a sealing ring (37), and the outer surface of the sealing ring (37) is movably connected to the inner surface of the sealing groove (32). A screw (38) is movably connected to the inside of the circular plate (36), and the outer surface of the screw (38) is embedded in the top of the inner circular ring (4) and connected by a thread.
5. The dustproof capacitor housing according to claim 1, characterized in that: The heat dissipation assembly (5) comprises a water tank (51), the outer surface of the water tank (51) is fixedly connected to the inner wall of the drawer (2), a water inlet pipe (52) and a water outlet pipe (53) are respectively passed through and communicated with each other on both sides of the interior of the water tank (51), the interiors of the water inlet pipe (52) and the water outlet pipe (53) are both passed through and communicated with the interior of the outer circular ring (4), a semiconductor cooling plate (54) is fixedly connected to the outer surface of the water tank (51), and the outer surface of the semiconductor cooling plate (54) is passed through and fixedly connected to the interior of the drawer (2).
6. The dustproof capacitor housing according to claim 1, characterized in that: The power supply assembly (8) comprises an electrostatic generator (81) and a slide (82), wherein the outer surface of the electrostatic generator (81) is fixedly connected to the inner wall of the drawer (2), and the outer surface of the slide (82) is fixedly connected to the inner wall of the drawer (2). A chute (83) is provided on the top of the slide (82), and a resistor plate (84) is fixedly connected to the inner surface of the chute (83). The outer surface of the resistor plate (84) is slidably connected to a slider (85), and the outer surface of the slider (85) is slidably connected to the inner surface of the chute (83).
7. The dustproof capacitor housing according to claim 6, characterized in that: The output ends of the slider (85) and the slide plate (82) are both electrically connected to the input end of the electrostatic generator (81), the input end of the electrolytic column (7) is electrically connected to the output end of the electrostatic generator (81), and the input end of the adsorption plate (9) is electrically connected to the output end of the electrostatic generator (81).
8. The dustproof capacitor housing according to claim 6, characterized in that: The top of the slider (85) is fixedly connected to a rack (86), the outer surface of the rack (86) is slidably connected to the inner surface of the slide groove (83), the outer surface of the rack (86) is slidably connected to the inside of the slide plate (82), the top of the slide plate (82) is embedded and fixedly connected to a drive motor (87), the output end of the drive motor (87) is fixedly connected to a gear (88), and the outer surface of the gear (88) is meshed with the outer surface of the rack (86).
Citation Information
Patent Citations
Drawer-type simply and conveniently installed intelligent capacitance equipment
CN110085421A
Dustproof capacitor shell
CN111863443A