CN219959892U - Energy-saving heat dissipation type switch cabinet - Google Patents
Energy-saving heat dissipation type switch cabinet Download PDFInfo
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- CN219959892U CN219959892U CN202321376902.6U CN202321376902U CN219959892U CN 219959892 U CN219959892 U CN 219959892U CN 202321376902 U CN202321376902 U CN 202321376902U CN 219959892 U CN219959892 U CN 219959892U
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- 230000017525 heat dissipation Effects 0.000 title claims abstract description 52
- 238000009423 ventilation Methods 0.000 claims abstract description 64
- 230000007246 mechanism Effects 0.000 claims abstract description 49
- 238000001816 cooling Methods 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 18
- 241001465754 Metazoa Species 0.000 description 2
- 206010053615 Thermal burn Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to the technical field of switch cabinets and discloses an energy-saving heat-dissipation type switch cabinet which comprises a cabinet body, wherein bases are fixedly arranged on two sides of the lower end face of the cabinet body, a second ventilating mechanism is fixedly arranged at the middle point of the lower end face of the cabinet body, a first ventilating mechanism is fixedly arranged on the upper end face of the cabinet body through a connecting mechanism, a cabinet door is hinged to the front end face of the cabinet body through a plurality of hinge hinges, an inner cabinet is fixedly arranged on the inner wall of the cabinet body through a plurality of fixing blocks, and two ventilating windows are formed in the position, close to the upper end, of the rear end face of the inner cabinet. According to the utility model, the unpowered heat dissipation can be carried out by the heat dissipation assembly consisting of the ventilation mechanisms at the upper end and the lower end and the heat dissipation fins at the two sides, so that the internal air circulation is enhanced, the unpowered heat dissipation is realized, the energy is saved, the efficiency is high, the contact area between the heat and the air can be increased, the heat dissipation effect is ensured, the additionally arranged filter screen can effectively prevent the garbage from entering the interior, and the operation of internal elements is prevented from being influenced by the jam of the garbage.
Description
Technical Field
The utility model relates to the technical field of switch cabinets, in particular to an energy-saving heat-dissipation type switch cabinet.
Background
The prior patent (publication number: CN 207819262U) discloses an energy-saving outdoor dustproof heat dissipation high-voltage switch cabinet, and aims to solve the problem that the traditional switch cabinet can cause more dust to accumulate in the cabinet body in the occasion of more dust, and the normal work of the electrical components in the cabinet body is affected, and the technical scheme is characterized in that: including the cabinet body, the cabinet body is for the seal structure sealed through sealing door, the internal heat pipe that still is equipped with of cabinet, the import and the export of heat pipe all with the external intercommunication of cabinet, there is the heat dissipation medium in the heat pipe just install circulating assembly in the heat pipe, reached can effectively dispel the heat, have the beneficial effect of better dustproof performance again.
The inventors found that the following problems exist in the prior art in the process of implementing the present utility model: 1. the heat dissipation is carried out by using the heat dissipation fan and the circulating fan in the circulating assembly, the electric energy is used for driving the heat dissipation for a long time, cooling water is required to be continuously added, electricity and water energy are consumed, and a great amount of cost and expense are required for the installation, maintenance and operation of the heat dissipation fan and the circulating assembly; 2. the cabinet body is in a sealed state as a whole, heat exchange is carried out through heat and the heat conduction pipe, and the heat inside the cabinet body is always in the cabinet body and cannot be discharged for heat dissipation, so that a person skilled in the art provides an energy-saving heat dissipation type switch cabinet to solve the problem in the background art.
Disclosure of Invention
The utility model aims to solve the defects in the prior art, and provides an energy-saving heat-dissipation type switch cabinet, which can perform unpowered heat dissipation through a heat dissipation assembly consisting of a ventilation mechanism at the upper end and the lower end and radiating fins at the two sides, strengthen the circulation of air in the interior, realize unpowered heat dissipation, save energy and realize high efficiency, increase the contact area of heat and air, ensure the heat dissipation effect, and effectively prevent garbage from entering the interior and prevent the garbage from being jammed to influence the operation of internal elements.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the energy-saving heat dissipation type switch cabinet comprises a cabinet body, wherein bases are fixedly arranged on two sides of the lower end face of the cabinet body, a second ventilation mechanism is fixedly arranged at the midpoint of the lower end face of the cabinet body, a first ventilation mechanism is fixedly arranged on the upper end face of the cabinet body through a connecting mechanism, and a cabinet door is hinged to the front end face of the cabinet body through a plurality of hinge hinges;
the inner wall of the cabinet body is fixedly provided with an inner cabinet through a plurality of fixing blocks, two ventilation windows are formed in the position, close to the upper end, of the rear end face of the inner cabinet, a plurality of cooling fins are uniformly and fixedly arranged between every two of the fixing blocks on two sides of the inner cabinet, a first filter screen is fixedly arranged in the position, close to the upper end, of the inner wall of the connecting mechanism, and a second filter screen is fixedly arranged in the position, close to the upper end, of the inner wall of the second ventilation mechanism;
through above-mentioned technical scheme, adopt upper and lower natural draft, carry out heat exchange with external air with the internal high temperature discharge of cabinet, external cold air can directly get into the cabinet internal portion simultaneously and dispel the heat and cool down, and a plurality of fin of both sides can directly derive the heat of interior cabinet and accomplish the heat exchange of air to reach and need not the radiating effect of power, practiced thrift the use of electric energy.
Further, the fixing blocks are respectively and fixedly arranged at the front and rear ends of the upper end face and the lower end face of the inner cabinet, the front and rear sides of the upper end and the lower end of the two side faces of the inner cabinet, a hollow cavity is formed between the outer wall of the inner cabinet and the inner wall of the cabinet body, and the rear end of the hollow cavity is consistent with the rear end of the fixing block;
through above-mentioned technical scheme, fix the inner wall department at the cabinet body with interior cabinet, prevent to take place to rock and drop the phenomenon, protected the safety of interior cabinet, the cavity in the middle of simultaneously can accomplish the heat exchange of inside gas and external gas, avoid interior cabinet heat direct transfer to the cabinet body on, reduced the scald that unexpected touch cabinet body took place.
Further, the cooling fins penetrate through two sides of the cabinet body, the lower end face of the first ventilation mechanism is in through connection with the upper end face of the connecting mechanism, the connecting mechanism penetrates through the upper end face of the connecting cabinet body, and the second ventilation mechanism penetrates through the lower end face of the connecting cabinet body;
through above-mentioned technical scheme, a plurality of fin can directly lead out the heat of interior cabinet to external and air and carry out the heat exchange for the radiating effect, and ventilation mechanism and No. two ventilation mechanism of upper and lower end accelerate the exchange of inside gas and external gas simultaneously to accelerate the radiating effect of the internal portion of cabinet.
Further, the first ventilation mechanism comprises a first ventilation box, a first ventilation opening is formed in the middle point of the front end face of the first ventilation box in a penetrating mode, and a bottom hole is formed in the middle point of the bottom end face of the inside of the first ventilation box;
through the technical scheme, air is gathered into the ventilation box through the ventilation openings which penetrate through the ventilation box from front to back, and enters the cabinet body through the bottom hole, and high-temperature gas in the cabinet body can also directly penetrate through the communicated holes to finish outward discharge, so that the heat exchange rate is accelerated.
Further, the connecting mechanism comprises a connecting pipe, a connecting port is formed in the middle point of the upper end face of the connecting pipe in a penetrating manner, and a first filter screen is fixedly arranged at the top end of the inner wall of the connecting port;
through above-mentioned technical scheme, the filter screen No. one of upper end reduces dropping of debris and rubbish, avoids the internal portion rubbish of cabinet too much, and rubbish is crowded leads to the fact the radiating effect to reduce, and the high temperature causes the component damage.
Further, the second ventilation mechanism comprises a second ventilation box, a side air port is formed in the middle point of the lower side of the front end face of the second ventilation box in a penetrating manner, and a second air port is formed in the middle point of the lower end face of the second ventilation box;
through the technical scheme, the gas can be discharged from the upper end and is discharged from the lower end, so that the heat exchange in the interior is quickened, and the heat dissipation effect is improved.
Further, the first filter screen and the second filter screen are both grid-shaped filter screens, and the two ventilation windows are inclined at the rear ends and penetrate through the rear end face of the inner cabinet;
through above-mentioned technical scheme, filter screen No. one and No. two filter screens filter respectively and avoid rubbish or toy entering the cabinet internal portion of upper end and lower extreme to under the cooperation of ventilation window, with the heat in the interior cabinet discharge, the heat dissipation of interior cabinet is accelerated.
Further, gaps with uniform size are arranged between every two of the plurality of radiating fins positioned on two sides of the cabinet body;
through the technical scheme, the plurality of radiating fins are not mutually influenced, so that air circulation among the radiating fins is ensured, and the radiating effect of the radiating fins is improved.
The utility model has the following beneficial effects:
1. according to the energy-saving heat-dissipation type switch cabinet provided by the utility model, the first ventilating box at the upper end, the connecting pipe and the second ventilating box at the lower end are arranged, when the temperature in the cabinet body is higher than the outside, the internal heat is discharged through the holes which are communicated up and down, and meanwhile, the outside air flow flows into the cabinet body from the holes, so that the air flow of the outside environment and the air flow in the switch cabinet body circulate, the heat exchange rate of the cabinet body is accelerated, and the heat dissipation efficiency of the cabinet body is improved.
2. According to the energy-saving heat dissipation type switch cabinet provided by the utility model, two groups of heat dissipation components are formed through the plurality of heat dissipation fins on two sides, gaps with the same size are uniformly formed among the plurality of heat dissipation fins, the heat dissipation fins can directly conduct out heat of the inner cabinet to finish heat exchange with the outside, the arrangement of the hollow cavity between the inner cabinet and the cabinet body can prevent heat of the inner cabinet from being quickly conducted to the cabinet body, scalding accidents caused by overhigh temperature of the cabinet body are avoided, and meanwhile, the filter screen is arranged at the upper connecting hole and the lower connecting hole to ensure that garbage and small animals are prevented from entering the cabinet body, so that excessive garbage in the cabinet body is prevented, and the heat dissipation effect is influenced.
3. According to the energy-saving heat-dissipation type switch cabinet provided by the utility model, through the heat dissipation assembly consisting of the ventilation mechanisms at the upper end and the lower end and the heat dissipation fins at the two sides, unpowered heat dissipation can be performed, internal air circulation is enhanced, unpowered heat dissipation is realized, energy is saved, the efficiency is high, the contact area of heat and air can be increased, the heat dissipation effect is ensured, the additionally arranged filter screen can effectively prevent garbage from entering the interior, and the operation of internal elements is prevented from being influenced by garbage congestion.
Drawings
Fig. 1 is an isometric schematic diagram of an energy-saving heat-dissipation type switch cabinet provided by the utility model;
fig. 2 is a schematic front sectional view of an energy-saving heat dissipation type switch cabinet according to the present utility model;
FIG. 3 is a schematic side sectional view of an energy-saving heat dissipation type switch cabinet according to the present utility model;
fig. 4 is an enlarged view of fig. 3 a in accordance with the present utility model.
Legend description:
1. a first ventilation mechanism; 101. a first ventilating box; 102. a bottom hole; 103. a first vent; 2. a connecting mechanism; 201. a communication port; 202. a connecting pipe; 3. a cabinet body; 4. a heat sink; 5. a cabinet door; 6. a base; 7. a second ventilation mechanism; 701. a second vent; 702. a second ventilating box; 703. a side air port; 8. a first filter screen; 9. a fixed block; 10. an inner cabinet; 11. a ventilation window; 12. a second filter screen; 13. hollow cavity.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Examples
Referring to fig. 1-4, one embodiment provided by the present utility model is: the utility model provides an energy-conserving heat dissipation formula cubical switchboard, including cabinet body 3, cabinet body 3 lower terminal surface both sides all are fixed and are provided with base 6, increase cabinet body 3 and ground's distance, reduce the humid corrosion's the surface corrosion cabinet body 3, cabinet body 3 lower terminal surface mid point department is fixed and is provided with No. two ventilation mechanism 7, cabinet body 3 up end is provided with No. one ventilation mechanism 1 through coupling mechanism 2 is fixed, cabinet body 3 front end is provided with cabinet door 5 through a plurality of hinge hinges articulated, add upper and lower ventilation hole, increase cabinet body 3 inside heat and air's area of contact, improve the radiating effect;
the cabinet body 3 inner wall is provided with interior cabinet 10 through a plurality of fixed blocks 9 is fixed, will separate interior cabinet 10 and cabinet body 3, reduce interior cabinet 10 and cabinet body 3's area of contact, thereby reduce thermal conduction, avoid the overheated scald accident that produces of cabinet body 3, two ventilation windows 11 have been seted up to interior cabinet 10 rear end face near upper end department, ventilation window 11 runs through interior cabinet 10 and is located cavity 13, accelerate the heat emission of interior cabinet 10, interior cabinet 10 both sides are located a plurality of fixed blocks 9 between two liang of even fixedly and are provided with a plurality of fin 4, a plurality of fin 4 form the radiating component that is located both sides, improve the radiating effect, coupling mechanism 2 inner wall is fixed to be provided with No. one filter screen 8 near upper end department, no. two ventilation mechanism 7 inner wall is fixed to be provided with No. two filter screens 12 near upper end department, the filter screen reduces the dropping of rubbish.
The fixed blocks 9 are respectively fixed on the upper end face of the inner cabinet 10, the front and rear ends of the lower end face and the front and rear sides of the two side faces near the upper end and near the lower end, a hollow cavity 13 is formed between the outer wall of the inner cabinet 10 and the inner wall of the cabinet body 3, the rear end of the hollow cavity 13 is consistent with the rear end of the fixed block 9, the inner cabinet 10 is fixed at the inner wall of the cabinet body 3, shaking and falling phenomena are prevented, the safety of the inner cabinet 10 is protected, meanwhile, the heat exchange between internal gas and external gas can be completed through the hollow cavity 13 in the middle, the heat of the inner cabinet 10 is prevented from being directly transmitted to the cabinet body 3, and scalding caused by accidental touch of the cabinet body 3 is reduced. The cooling fins 4 penetrate through two sides of the cabinet body 3, the lower end face of the first ventilating mechanism 1 and the upper end face of the connecting mechanism 2 are in through connection, the connecting mechanism 2 penetrates through the upper end face of the communicating cabinet body 3, the second ventilating mechanism 7 penetrates through the lower end face of the communicating cabinet body 3, the cooling fins 4 can directly guide out heat of the inner cabinet 10 to the outside for heat exchange with air, heat dissipation effect is accelerated, and meanwhile the first ventilating mechanism 1 and the second ventilating mechanism 7 at the upper end and the lower end accelerate exchange of internal gas and external gas, so that heat dissipation effect inside the cabinet body 3 is accelerated.
The first ventilation mechanism 1 comprises a first ventilation box 101, a first ventilation opening 103 is formed in the middle point of the front end face of the first ventilation box 101 in a penetrating mode, a bottom hole 102 is formed in the middle point of the bottom end face inside the first ventilation box 101, air is gathered into the first ventilation box 101 through the first ventilation opening 103 penetrating front and back and enters the cabinet body 3 through the bottom hole 102, and high-temperature air in the cabinet body 3 can be directly discharged outwards through the communicated holes, so that heat exchange rate is accelerated. The connecting mechanism 2 comprises a connecting pipe 202, a connecting port 201 is formed in the middle point of the upper end face of the connecting pipe 202 in a penetrating mode, a first filter screen 8 is fixedly arranged at the top end of the inner wall of the connecting port 201, sundries and garbage falling are reduced by the first filter screen 8 at the upper end, excessive garbage in the cabinet body 3 is avoided, the heat dissipation effect is reduced due to the fact that garbage is jammed, and elements caused by the excessive temperature are damaged.
The second ventilation mechanism 7 comprises a second ventilation box 702, a side air port 703 is formed in the middle point of the lower side of the front end face of the second ventilation box 702 in a penetrating mode, a second air port 701 is formed in the middle point of the lower end face of the second ventilation box 702, gas can be discharged from the upper end and is discharged from the lower end, heat exchange in the air conditioner is quickened, and radiating effect is improved. The first filter screen 8 and the second filter screen 12 are grid-shaped filter screens, the two ventilation windows 11 are inclined at the rear end and penetrate through the rear end face of the inner cabinet 10, the first filter screen 8 and the second filter screen 12 are used for respectively filtering and preventing garbage or small animals at the upper end and the lower end from entering the cabinet body 3, and heat in the inner cabinet 10 is discharged under the cooperation of the ventilation windows 11, so that heat dissipation of the inner cabinet 10 is accelerated. The plurality of cooling fins 4 positioned on two sides of the cabinet body 3 are provided with gaps with uniform size at intervals, the plurality of cooling fins 4 are not mutually influenced, air circulation among the cooling fins 4 is ensured, and the cooling effect of the cooling fins 4 is improved.
Working principle: the switch, the operation element and the circuit are fixed in the inner cabinet 10, the cabinet door 5 is closed and is carried to a designated position for fixing, when the inner part operates, the first ventilation opening 103 at the upper end and the second ventilation opening 701 at the lower end are always unfolded, so that the outside air and the inside air are always in heat exchange work, the heat of the inner cabinet 10 is led out by the plurality of cooling fins 4 at the two sides to exchange heat with the outside, the continuous heat dissipation in the continuous operation of the element in the cabinet body 3 is ensured, the heat dissipation is carried out without external power heat dissipation equipment, and the energy-saving and environment-friendly heat dissipation effect is good.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.
Claims (8)
1. Energy-conserving heat dissipation formula cubical switchboard, including the cabinet body (3), its characterized in that: the cabinet is characterized in that bases (6) are fixedly arranged on two sides of the lower end face of the cabinet body (3), a second ventilating mechanism (7) is fixedly arranged at the middle point of the lower end face of the cabinet body (3), a first ventilating mechanism (1) is fixedly arranged on the upper end face of the cabinet body (3) through a connecting mechanism (2), and a cabinet door (5) is hinged to the front end face of the cabinet body (3) through a plurality of hinge hinges;
the utility model discloses a cabinet, including cabinet body (3) inner wall, cabinet body (10) are provided with through a plurality of fixed blocks (9) are fixed, two ventilation windows (11) have been seted up to interior cabinet (10) rear end face near upper end department, interior cabinet (10) both sides are located a plurality of fixed blocks (9) and evenly fixedly are provided with a plurality of fin (4) between every two, the fixed filter screen (8) that is provided with of coupling mechanism (2) inner wall near upper end department, no. two ventilation mechanism (7) inner wall is provided with No. two filter screens (12) near upper end department fixedly.
2. An energy efficient heat dissipating switchgear as claimed in claim 1, wherein: the fixing blocks (9) are respectively and fixedly arranged at the upper end face of the inner cabinet (10), the front and rear end sides of the lower end face and the front and rear sides of the upper end and the lower end of the two side faces, a hollow cavity (13) is formed between the outer wall of the inner cabinet (10) and the inner wall of the cabinet body (3), and the rear end of the hollow cavity (13) is consistent with the rear end of the fixing block (9).
3. An energy efficient heat dissipating switchgear as claimed in claim 1, wherein: the cooling fins (4) penetrate through two sides of the cabinet body (3), the lower end face of the first ventilation mechanism (1) is in through connection with the upper end face of the connecting mechanism (2), the connecting mechanism (2) penetrates through the upper end face of the communication cabinet body (3), and the second ventilation mechanism (7) penetrates through the lower end face of the communication cabinet body (3).
4. An energy efficient heat dissipating switchgear as claimed in claim 1, wherein: the first ventilation mechanism (1) comprises a first ventilation box (101), a first ventilation opening (103) is formed in the middle point of the front end face of the first ventilation box (101) in a penetrating mode, and a bottom hole (102) is formed in the middle point of the bottom end face inside the first ventilation box (101).
5. An energy efficient heat dissipating switchgear as claimed in claim 1, wherein: the connecting mechanism (2) comprises a connecting pipe (202), a connecting port (201) is formed in the middle point of the upper end face of the connecting pipe (202) in a penetrating mode, and a first filter screen (8) is fixedly arranged at the top end of the inner wall of the connecting port (201).
6. An energy efficient heat dissipating switchgear as claimed in claim 1, wherein: the second ventilation mechanism (7) comprises a second ventilation box (702), a side air port (703) is formed in the middle point of the lower side of the front end face of the second ventilation box (702) in a penetrating mode, and a second ventilation port (701) is formed in the middle point of the lower end face of the second ventilation box (702).
7. An energy efficient heat dissipating switchgear as claimed in claim 1, wherein: the first filter screen (8) and the second filter screen (12) are grid-shaped filter screens, and the two ventilation windows (11) are inclined at the rear ends and penetrate through the rear end face of the inner cabinet (10).
8. An energy efficient heat dissipating switchgear as claimed in claim 1, wherein: the plurality of cooling fins (4) positioned on two sides of the cabinet body (3) are spaced with gaps with uniform size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321376902.6U CN219959892U (en) | 2023-06-01 | 2023-06-01 | Energy-saving heat dissipation type switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321376902.6U CN219959892U (en) | 2023-06-01 | 2023-06-01 | Energy-saving heat dissipation type switch cabinet |
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| Publication Number | Publication Date |
|---|---|
| CN219959892U true CN219959892U (en) | 2023-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321376902.6U Active CN219959892U (en) | 2023-06-01 | 2023-06-01 | Energy-saving heat dissipation type switch cabinet |
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| Country | Link |
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| CN (1) | CN219959892U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117526134A (en) * | 2023-11-16 | 2024-02-06 | 航变电力科技有限公司 | Complete switch equipment for low-voltage capacitor |
-
2023
- 2023-06-01 CN CN202321376902.6U patent/CN219959892U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117526134A (en) * | 2023-11-16 | 2024-02-06 | 航变电力科技有限公司 | Complete switch equipment for low-voltage capacitor |
| CN117526134B (en) * | 2023-11-16 | 2024-04-16 | 航变电力科技有限公司 | Complete switch equipment for low-voltage capacitor |
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