CN111343839A - LED lamp autogyration heat dissipation type starter - Google Patents
LED lamp autogyration heat dissipation type starter Download PDFInfo
- Publication number
- CN111343839A CN111343839A CN202010176304.9A CN202010176304A CN111343839A CN 111343839 A CN111343839 A CN 111343839A CN 202010176304 A CN202010176304 A CN 202010176304A CN 111343839 A CN111343839 A CN 111343839A
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- CN
- China
- Prior art keywords
- wall
- liquid
- starter
- air bag
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000007858 starting material Substances 0.000 title claims abstract description 40
- 230000017525 heat dissipation Effects 0.000 title claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 238000005192 partition Methods 0.000 claims abstract description 5
- 239000011550 stock solution Substances 0.000 claims description 8
- 239000002826 coolant Substances 0.000 claims description 6
- 239000000696 magnetic material Substances 0.000 claims description 5
- 239000000110 cooling liquid Substances 0.000 abstract description 8
- 238000001704 evaporation Methods 0.000 abstract description 7
- 230000008020 evaporation Effects 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- 239000000243 solution Substances 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20381—Thermal management, e.g. evaporation control
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
- H05K7/20145—Means for directing air flow, e.g. ducts, deflectors, plenum or guides
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20209—Thermal management, e.g. fan control
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
The invention discloses an LED lamp self-rotating heat dissipation type starter which comprises a starter body, wherein a shell is fixedly sleeved on the side wall of the starter body, an annular cavity is formed in the inner wall of the shell, a plurality of balancing weights are connected in the annular cavity in a sliding mode, liquid storage cavities are formed in the balancing weights, evaporation liquid is filled in the liquid storage cavities, two adjacent liquid storage cavities are communicated through corrugated pipes, and cooling liquid is filled in the annular cavity. According to the invention, the temperature of the evaporated liquid is raised through the heat generated when the starter body works, so that the evaporated liquid is vaporized and expanded to push the sealing partition plate to move, the corrugated pipe is driven by the balancing weight to rotate on the inner wall of the annular cavity, the heat-absorbing evaporated liquid enters the cooling liquid, the cooling liquid absorbs the heat on the evaporated liquid, and further the heat on the starter body is absorbed, and the phenomenon that the starter body is oxidized due to the existence of the heat and internal electronic elements are damaged, so that the service life of the starter body is shortened is avoided.
Description
Technical Field
The invention relates to the technical field of LED lamps, in particular to a self-rotating heat-dissipation type starter of an LED lamp.
Background
With the development of the times, the living standard of people is continuously improved, the LED lamp is widely used by people due to the advantages of high luminous flux, low power consumption and the like, and the LED lamp tube is usually required to be instantly started by a starter in the use process of the LED lamp.
Because the starter can produce a large amount of heats during operation, these heats not only can accelerate oxygen in the air to oxidize the starter, still can make the structure of the inside electronic component of starter change for the inside electronic component of starter damages because of high temperature, has reduced the life of starter.
To this end, we propose a self-rotating heat dissipation type starter of LED lamp to solve the above problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a self-rotating heat dissipation type starter of an LED lamp.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a LED lamp autogyration heat dissipation type starter, includes the starter body, the fixed casing that has cup jointed of starter body lateral wall, shells inner wall has seted up the annular chamber, sliding connection has a plurality of balancing weights in the annular chamber, be equipped with the stock solution chamber in the balancing weight, the stock solution intracavity is filled there is the evaporating liquid, adjacent two be linked together through the bellows between the stock solution chamber, just the bellows is along casing circumference deformation, the middle part fixedly connected with seal plate of bellows, the packing has the coolant liquid in the annular chamber.
Preferably, one of the balancing weights is made of a magnetic material, the housing is provided with an arc-shaped cavity, the inner wall of the arc-shaped cavity is slidably connected with a magnetic slider, opposite side walls of the magnetic slider are respectively fixedly connected with the inner wall of the arc-shaped cavity through a first telescopic air bag and a second telescopic air bag, the side wall of the first telescopic air bag is connected with a one-way air suction pipe communicated with the inner wall of the housing, the side wall of the first telescopic air bag is connected with a one-way air outlet pipe communicated with the outer wall of the housing, the side wall of the second telescopic air bag is connected with a one-way air outlet pipe communicated with the inner wall of the housing, and.
The invention has the following beneficial effects:
1. by arranging the annular cavity, the configuration block, the evaporated liquid, the corrugated pipe, the sealing partition plate and the cooling liquid, the temperature of the evaporated liquid can be increased by heat generated by the starter body during working, the evaporated liquid is vaporized and expanded, the sealing partition plate is further pushed to move, the gravity center of the balancing weight in the annular cavity is increased, the balancing weight drives the corrugated pipe to rotate on the inner wall of the annular cavity, the evaporated liquid after vaporization and expansion enters the cooling liquid, the cooling liquid absorbs the heat on the evaporated liquid, the evaporated liquid can continuously absorb the heat generated by the working of the starter body, the starter body is prevented from being oxidized and internal electronic elements are prevented from being damaged due to the existence of the heat, and the service life of the starter body is further shortened;
2. by arranging the arc-shaped cavity, the magnetic slide block, the first telescopic air bag, the second telescopic air bag, the one-way air suction pipe and the one-way air outlet pipe, when the balancing weight rotates on the inner wall of the annular cavity, the magnetic slide block attracted with the balancing weight can be driven to slide on the inner wall of the arc-shaped cavity, so that the first telescopic air bag is stretched under the action of the magnetic slide block, the second telescopic air bag is compressed, the first telescopic air bag absorbs heat in the shell, and the second telescopic air bag introduces air into the shell, so that the air in the shell generates convection, and the dissipation of the heat in the shell is accelerated;
3. the heat that produces through the starter body is the operation of the whole device of energy drive, and then carries out the self-cooling to the starter body, need not other actuating mechanism, accords with the environmental protection concept.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 2 is a schematic sectional view of the direction A-A according to a first embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a second embodiment of the present invention;
FIG. 4 is a schematic top view of a portion of FIG. 3;
fig. 5 is a schematic sectional view of the direction B-B in the second embodiment of the present invention.
In the figure: 1 starter body, 2 casings, 3 annular chambers, 4 balancing weights, 5 stock solution chambeies, 6 coolant liquid, 7 bellows, 8 sealed baffles, 9 arc chambeies, 10 magnetic slider, 11 first flexible gasbags, 12 second flexible gasbags, 13 one-way breathing pipes, 14 one-way outlet ducts.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example one
Referring to fig. 1-2, a self-rotating heat dissipation type starter for an LED lamp, comprising a starter body 1, a casing 2 is fixedly sleeved on a side wall of the starter body 1, an annular cavity 3 is formed on an inner wall of the casing 2, a plurality of balancing weights 4 are slidably connected in the annular cavity 3, the balancing weights 4 can be made of copper materials and have good heat conductivity, liquid storage cavities 5 are formed in the balancing weights 4, evaporation liquid is filled in the liquid storage cavities 5, the evaporation liquid can be dichloromethane solution, the boiling point of the dichloromethane solution is 39 ℃, two adjacent liquid storage cavities 5 are communicated with each other through a corrugated pipe 7, the corrugated pipe 7 deforms along the circumferential direction of the casing 2, the corrugated pipe 7 can be made of silica gel materials, the corrugated pipe 7 is arc-shaped, the corrugated pipe 7 deforms along the circumferential direction of the annular cavity 3, the plurality of corrugated pipes 7 connect the balancing weights, bellows 7's middle part fixedly connected with seal spacer 8, it is worth mentioning, seal spacer 8 adopts insulation material to make, seal spacer 8 is divided bellows 7 into two, avoid the evaporating liquid in the adjacent stock solution chamber 5 to take place to mix, annular chamber 3 intussuseption is filled with coolant liquid 6, because casing 2 is cyclic annular, make casing 2 coolant liquid 6 be located annular chamber 3 below all the time when the level is placed, make the evaporating liquid absorb heat vaporization inflation back, the swivel becket can rotate along annular chamber 3, the direction of rotation is shown as the arrow direction in figure 2, make coolant liquid 6 can absorb the heat on the evaporating liquid in the rotatory back balancing weight 4 all the time, make the swivel becket can last absorb the heat on the starter body 1.
In this embodiment, heat generated by the starter body 1 during operation is conducted to the weight 4 slidably connected to the inner wall of the annular cavity 3 through the housing 2, so that the temperature of the evaporated liquid in the liquid storage cavity 5 formed in the weight 4 is raised, the evaporated liquid is vaporized and expanded, and the seal partition plate 8 fixedly connected to the inner wall of the bellows 7 is pushed to move, so that the bellows 7 located above the inner wall of the annular cavity 3 extends to squeeze the bellows 7 located below the inner wall of the annular cavity 3, and further the center of gravity of the rotating ring is moved upward, so that the rotating ring is integrally rotated, and the heat-absorbed weight 4 is rotated into the cooling liquid 6 located below the inner wall of the annular cavity 3, so that the cooling liquid 6 can absorb heat in the evaporated liquid in the liquid storage cavity 5, and the evaporated liquid can be absorbed by the starter body 1 all the time during, thereby extending the life of the starter body 1.
Example two
Referring to fig. 3-5, different from the first embodiment, one of the weight blocks 4 is made of a magnetic material, the housing 2 is provided with an arc-shaped cavity 9, the inner wall of the arc-shaped cavity 9 is slidably connected with a magnetic slider 10, further, the inner wall of the arc-shaped cavity 9 is provided with a through hole for balancing the air pressure when the magnetic slider 10 moves, opposite side walls of the magnetic slider 10 are fixedly connected with the inner wall of the arc-shaped cavity 9 through a first telescopic air bag 11 and a second telescopic air bag 12 respectively, the side wall of the first telescopic air bag 11 is connected with a one-way air suction pipe 13 communicated with the inner wall of the housing 2, the side wall of the first telescopic air bag 11 is connected with a one-way air outlet pipe 14 communicated with the outer wall of the housing 2, the side wall of the second telescopic air bag 12 is connected with a one-way air suction pipe 13, the balancing weight 4 made by magnetic material can drive rather than the magnetic slide 10 that attracts mutually rotates at the 9 inner walls in arc chamber, the direction of rotation is as shown in fig. 5, make magnetic slide 10 stretch first flexible gasbag 11, compress the flexible gasbag 12 of second simultaneously, make first flexible gasbag 11 and the flexible gasbag 12 of second bleed and blow in to casing 2 respectively, make 2 interior air of casing carry out the convection current, when this balancing weight 4 moves to when separating with magnetic slide 10, magnetic attraction between balancing weight 4 and the magnetic slide 10 reduces gradually, make first flexible gasbag 11 and the flexible gasbag 12 of second can be at self deformability recovering to initial condition.
Further, the one-way air suction pipe 13 only allows air to be sucked into the telescopic airbag from the outside, the one-way air outlet pipe 14 only allows air in the telescopic airbag to be discharged to the outside, and the one-way air suction pipe 13 and the one-way air outlet pipe 14 can be internally provided with a one-way valve to realize the functions.
In this embodiment, when the swivel becket rotates, the balancing weight 4 made by magnetic material can drive rather than the magnetic sliding block 10 that attracts mutually rotates at the 9 inner walls in arc chamber, it stretches first flexible gasbag 11 to get magnetic sliding block 10, compress the flexible gasbag 12 of second simultaneously, make first flexible gasbag 11 and the flexible gasbag 12 of second bleed and blow in to casing 2 respectively, make first flexible gasbag 11 can absorb the heat in casing 2, make 2 interior air of casing carry out the convection current, accelerate giving off of the heat that produces starter body 1 during operation.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (2)
1. The utility model provides a LED lamp autogyration heat dissipation type starter, includes starter body (1), the fixed cover of starter body (1) lateral wall has cup jointed casing (2), its characterized in that, annular chamber (3) have been seted up to casing (2) inner wall, sliding connection has a plurality of balancing weights (4) in annular chamber (3), be equipped with stock solution chamber (5) in balancing weight (4), stock solution chamber (5) intussuseption is filled with the evaporative liquid, adjacent two be linked together through bellows (7) between stock solution chamber (5), just bellows (7) are along casing (2) circumference deformation, the middle part fixedly connected with sealed partition plate (8) of bellows (7), annular chamber (3) intussuseption is filled with coolant liquid (6).
2. The LED lamp self-rotating heat dissipation type starter of claim 1, one of the balancing weights (4) is made of magnetic material, the shell (2) is provided with an arc-shaped cavity (9), the inner wall of the arc-shaped cavity (9) is connected with a magnetic slide block (10) in a sliding way, the opposite side walls of the magnetic slide block (10) are respectively fixedly connected with the inner wall of the arc-shaped cavity (9) through a first telescopic air bag (11) and a second telescopic air bag (12), the side wall of the first telescopic air bag (11) is connected with a one-way air suction pipe (13) communicated with the inner wall of the shell (2), the side wall of the first telescopic air bag (11) is connected with a one-way air outlet pipe (14) communicated with the outer wall of the shell (2), the side wall of the second telescopic air bag (12) is connected with a one-way air outlet pipe (14) communicated with the inner wall of the shell (2), the side wall of the second telescopic air bag (12) is connected with a one-way air suction pipe (13) communicated with the outer wall of the shell (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010176304.9A CN111343839A (en) | 2020-03-13 | 2020-03-13 | LED lamp autogyration heat dissipation type starter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010176304.9A CN111343839A (en) | 2020-03-13 | 2020-03-13 | LED lamp autogyration heat dissipation type starter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111343839A true CN111343839A (en) | 2020-06-26 |
Family
ID=71186166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010176304.9A Pending CN111343839A (en) | 2020-03-13 | 2020-03-13 | LED lamp autogyration heat dissipation type starter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111343839A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111770258A (en) * | 2020-07-23 | 2020-10-13 | 卓培辉 | Rotatory heat dissipation formula security protection surveillance camera head |
| CN111780003A (en) * | 2020-07-14 | 2020-10-16 | 杨俊玲 | Mosquito-repelling LED street lamp |
| CN112186538A (en) * | 2020-10-14 | 2021-01-05 | 方水龙 | Communication is with high-efficient heat dissipation type switch board |
| CN112524506A (en) * | 2020-11-23 | 2021-03-19 | 戴祥禄 | Heat dissipation humidification type multifunctional desk lamp |
| CN112838704A (en) * | 2020-12-30 | 2021-05-25 | 徐州南普机电科技有限公司 | High heat dispersion motor |
| CN113177436A (en) * | 2021-04-01 | 2021-07-27 | 深圳市鑫保泰技术有限公司 | Ultrasonic finger vein authentication device |
| CN113231634A (en) * | 2021-04-07 | 2021-08-10 | 李孝波 | Carbide lathe tool piece powder embossing mold utensil |
| CN113708272A (en) * | 2021-10-28 | 2021-11-26 | 江苏金通源实业有限公司 | Normal-pressure sealed air insulation switch cabinet |
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| US20030193260A1 (en) * | 2002-04-16 | 2003-10-16 | Reiter Frederick B. | Composite power metal stator sleeve |
| CN109275288A (en) * | 2018-09-13 | 2019-01-25 | 王清凤 | A kind of starter radiator |
| CN109451221A (en) * | 2018-11-23 | 2019-03-08 | 杨浩 | A kind of spinning heat dissipation monitor |
| CN110425458A (en) * | 2019-08-12 | 2019-11-08 | 郑州万维电子科技有限公司 | A kind of self-radiating LED shot-light |
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2020
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030193260A1 (en) * | 2002-04-16 | 2003-10-16 | Reiter Frederick B. | Composite power metal stator sleeve |
| CN109275288A (en) * | 2018-09-13 | 2019-01-25 | 王清凤 | A kind of starter radiator |
| CN109451221A (en) * | 2018-11-23 | 2019-03-08 | 杨浩 | A kind of spinning heat dissipation monitor |
| CN110425458A (en) * | 2019-08-12 | 2019-11-08 | 郑州万维电子科技有限公司 | A kind of self-radiating LED shot-light |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111780003A (en) * | 2020-07-14 | 2020-10-16 | 杨俊玲 | Mosquito-repelling LED street lamp |
| CN111770258A (en) * | 2020-07-23 | 2020-10-13 | 卓培辉 | Rotatory heat dissipation formula security protection surveillance camera head |
| CN111770258B (en) * | 2020-07-23 | 2021-12-28 | 深圳市狮安联讯科技有限公司 | Rotatory heat dissipation formula security protection surveillance camera head |
| CN112186538A (en) * | 2020-10-14 | 2021-01-05 | 方水龙 | Communication is with high-efficient heat dissipation type switch board |
| CN112524506A (en) * | 2020-11-23 | 2021-03-19 | 戴祥禄 | Heat dissipation humidification type multifunctional desk lamp |
| CN112838704A (en) * | 2020-12-30 | 2021-05-25 | 徐州南普机电科技有限公司 | High heat dispersion motor |
| CN113177436A (en) * | 2021-04-01 | 2021-07-27 | 深圳市鑫保泰技术有限公司 | Ultrasonic finger vein authentication device |
| CN113231634A (en) * | 2021-04-07 | 2021-08-10 | 李孝波 | Carbide lathe tool piece powder embossing mold utensil |
| CN113708272A (en) * | 2021-10-28 | 2021-11-26 | 江苏金通源实业有限公司 | Normal-pressure sealed air insulation switch cabinet |
| CN113708272B (en) * | 2021-10-28 | 2021-12-28 | 江苏金通源实业有限公司 | Normal-pressure sealed air insulation switch cabinet |
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Application publication date: 20200626 |