CN109638657B - Dehumidifying device used in fully-sealed control cabinet - Google Patents
Dehumidifying device used in fully-sealed control cabinet Download PDFInfo
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- CN109638657B CN109638657B CN201811492800.4A CN201811492800A CN109638657B CN 109638657 B CN109638657 B CN 109638657B CN 201811492800 A CN201811492800 A CN 201811492800A CN 109638657 B CN109638657 B CN 109638657B
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- sliding block
- electric cylinder
- cabinet
- stroke electric
- axial flow
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- 238000007789 sealing Methods 0.000 claims abstract description 24
- 238000009423 ventilation Methods 0.000 claims abstract description 20
- 230000033001 locomotion Effects 0.000 claims abstract description 6
- 238000002955 isolation Methods 0.000 claims description 6
- 238000007791 dehumidification Methods 0.000 abstract description 19
- 238000010438 heat treatment Methods 0.000 abstract description 13
- 238000000034 method Methods 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000009833 condensation Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000013589 supplement Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 241000255925 Diptera Species 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D22/00—Control of humidity
- G05D22/02—Control of humidity characterised by the use of electric means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Drying Of Gases (AREA)
Abstract
The invention discloses a dehumidifying device used in a fully-sealed control cabinet. The invention comprises a cabinet bottom plate, wherein a vent hole is formed in the middle of the cabinet bottom plate, and a guide rail, a heater and a long-stroke electric cylinder are arranged on the upper surface of the cabinet bottom plate; the guide rail is provided with a sliding block matched with the guide rail, the top of the sliding block is connected with a supporting plate, a push rod of the long-stroke electric cylinder is connected with the side face of the sliding block through a push rod connecting piece, and the supporting plate and the sliding block are driven to do translational motion along the guide rail through the long-stroke electric cylinder; the supporting plate is provided with a short-stroke electric cylinder above the supporting plate and an axial flow fan below the short-stroke electric cylinder, and a push rod of the short-stroke electric cylinder penetrates through the supporting plate and then is connected with a sealing gasket below the supporting plate; and a ventilation assembly is arranged above the axial flow fan. The invention uses a heating and exhaust combination mode to dehumidify the gas in the cabinet cavity, and can seal the vent hole of the control cabinet after dehumidification is finished.
Description
Technical Field
The invention relates to a dehumidifying device of a fully-sealed control cabinet, in particular to a device for dehumidifying gas in the fully-sealed control cabinet by using a heating and exhausting mode.
Background
At present, the box body of the outdoor control cabinet of the power grid substation is affected by coastal, rainy, humid and other geographical environment factors, the box body has a damp problem, and power grid equipment accidents are very easy to occur. If the isolation and grounding switch box is wet, knife blocking and movement rejection or knife misoperation can occur; if the breaker mechanism box is wet, the problems of misoperation, abnormal signaling and the like of the breaker switch can occur; if the GIS equipment or the transformer control cabinet is wetted, the intelligent terminal may be halted to stop working, the device is abnormal, and the like.
The box body of the outdoor control box of the power grid is wetted mainly because water vapor exists in the box body, condensation can be generated under the temperature change, and the box body sealing element (sealing ring aging or connecting part sealing glue failure) is wetted when in service. In addition, the problem of dehumidification of the interior of the box body cannot be fundamentally solved only by installing the heating device, and on the other hand, when the ambient temperature is reduced, the interior of the box body is heated by starting the heating device, so that condensation is more likely to be generated on the wall of the box body, and the humidification of the interior of the box body is accelerated.
When the box body of the control cabinet is wetted, the box body can be opened to naturally emit moisture only at the clear weather time, or a heating device or a semiconductor dehumidifying device is additionally arranged in the box body of the control cabinet with larger space such as the control cabinet, so as to solve the problem of box body wetting, but the scheme of additionally arranging the heating device can not perfectly solve the problem of box body internal wetting of the outdoor control cabinet of the power grid because of lacking effective means to remove water vapor in the box body.
Therefore, it is necessary to develop a novel box body moisture preventing/removing device to solve the problem of moisture in the box body of the outdoor control cabinet of the power grid.
According to literature reports, the current common methods of the dehumidifying device in the domestic control cabinet mainly comprise the following three methods:
1) Heating and dehumidifying: the dehumidification principle of the method is that the temperature in the switch cabinet is increased by heating the heater, and the capacity of dissolving moisture in air is improved, so that the aim of reducing relative humidity is fulfilled, and condensation is not easy to occur. However, the dehumidification efficiency of the method is low, mainly because the water vapor in the control cabinet is not really discharged out of the cabinet, and the temperature difference generated by heating alone is difficult to ensure that the air in the cabinet can reach an ideal circulation effect, and the whole dehumidification is difficult to realize for some shielded spaces.
2) Condensation and dehumidification method: the dehumidification principle of the method is that the water vapor in the cabinet is condensed into water and then discharged out of the cabinet, thus fundamentally solving the condition of condensation. However, this method has low efficiency of dehumidification at low temperature and high humidity and risk of water leakage.
3) Dry air dehumidifying method: the dehumidification principle of this method is to deliver dry air into the cabinet, equivalent to ventilation. However, the device for drying the air is high in cost and occupies a larger space, and if the drying device is placed outside the control cabinet, the influence of severe environments such as wind, rain and the like on the control cabinet outdoors is also considered.
However, in a general control box, a ventilation opening is generally provided, so that after the dehumidification operation is finished, external humid air enters through the ventilation opening, and a dry state is difficult to keep lasting, so that the operating frequency of a heater or other dehumidification devices is increased, and the energy consumption is increased.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a dehumidifying device used in a fully-sealed control cabinet, which dehumidifies gas in a cabinet cavity in a heating and exhaust combined mode and can seal ventilation holes of the control cabinet after dehumidification is finished.
Therefore, the invention adopts the following technical scheme: the dehumidifying device used in the fully-sealed control cabinet comprises a cabinet body bottom plate, wherein a vent hole is formed in the middle of the cabinet body bottom plate, and a guide rail, a heater and a long-stroke electric cylinder are arranged on the upper surface of the cabinet body bottom plate; the guide rail is provided with a sliding block matched with the guide rail, the top of the sliding block is connected with a supporting plate, a push rod of the long-stroke electric cylinder is connected with the side face of the sliding block through a push rod connecting piece, and the supporting plate and the sliding block are driven to do translational motion along the guide rail through the long-stroke electric cylinder;
the support plate is provided with a short-stroke electric cylinder above the support plate and an axial flow fan below the short-stroke electric cylinder, a push rod of the short-stroke electric cylinder penetrates through the support plate and then is connected with a sealing gasket below the support plate, the sealing gasket is used for being matched with the vent hole, the sealing gasket is driven to move up and down through the short-stroke electric cylinder, and the sealing gasket is prevented from being contacted with a bottom plate of the cabinet body when the support plate and the sliding block translate; the supporting plate above the axial flow fan is provided with a through hole communicated with the air outlet of the axial flow fan;
the upper part of the axial flow fan is provided with a ventilation assembly, and gas in the cabinet body is sucked by the axial flow fan through the ventilation assembly and is discharged out of the cabinet body.
The invention adopts the mode of heating by the heater and exhausting by the axial flow fan to dehumidify, and can seal the control cabinet after dehumidification is finished. The heater is arranged on the bottom plate of the cabinet body, which is beneficial to the diffusion of hot air; the invention has no vent hole except the vent hole of the bottom plate of the cabinet body. When the axial flow fan is operated, the air pressure in the ventilation assembly is reduced, and moist air nearby the ventilation assembly is promoted to enter the ventilation assembly. The short-stroke electric cylinder drives the sealing gasket to move up and down, so that the friction resistance when the supporting plate integrally translates is reduced.
As the supplement of the technical scheme, the ventilation assembly comprises a wind collecting cover and a corrugated hose, wherein the wind collecting cover is arranged right above the axial flow fan, the corrugated hose is connected with the corrugated hose, and the corrugated hose is connected with exhaust branch pipes arranged on two sides of the corrugated hose through a four-way joint. When the support plate moves horizontally along with the sliding block, the wind collecting cover moves along with the axial flow fan, the corrugated hose stretches, and the upper position of the corrugated hose is kept unchanged. The corrugated hose and the exhaust branch pipe adopt PVC pipes common in the market, can intercept different lengths according to the needs, and have the characteristics of low price and strong adaptability.
As a supplement to the technical scheme, the four corners of the wind collecting cover are connected with the axial flow fan through bolts.
In addition to the technical scheme, the top of the corrugated hose is connected with the top surface of the cabinet body through bolts.
As the supplement of the technical proposal, the corrugated hose and the exhaust branch pipe are in a tree shape as a whole, and can be arranged according to the space position of the installation of the electrical components in the cabinet body, so that the moist gas in the cabinet body is pumped away as much as possible.
In addition to the above technical scheme, a travel switch is arranged on the supporting plate opposite to the vent hole.
In addition to the above technical scheme, an isolation net positioned right below the vent hole is installed on the lower surface of the bottom plate of the cabinet body. The isolation net can effectively resist outdoor mosquitoes and prevent the axial flow fan from being influenced by scraping of the dead leaves in the windy weather.
In addition to the above technical scheme, the sliding block comprises a first sliding block and a second sliding block which are linearly distributed, the push rod connecting piece is connected with the side face of the second sliding block, and the first sliding block and the second sliding block are connected with the supporting plate through screws. The second slider plays the effect of driving the backup pad and removes, and the first slider makes the removal of backup pad more balanced.
As the supplement of the technical scheme, the bottom surface and the top surface of the cabinet body are respectively provided with a humidity sensor for detecting the humidity in the cabinet body.
In addition to the technical scheme, a dehumidifying device controller is arranged on the side face of the cabinet body.
The invention has the following beneficial effects:
1) The combined dehumidifying device for electric heating and axial flow fan exhaust can reduce the relative humidity in the cabinet cavity, promote the gas circulation in the cabinet cavity, and the designed dendritic ventilation assembly can achieve the effect of rapid dehumidification on the space far from the heater and the hidden narrow area.
2) After the dehumidification work is finished, the sealing gasket is used for sealing the vent holes, and as the fully-sealed control cubicle has no other vent holes, the air entering from the outside due to humidity can be prevented, and the drying and dehumidification effects can be maintained.
3) Most of the elements are concentrated on a bottom plate in the cabinet cavity and are connected to a supporting plate, so that the cabinet has the characteristic of compact structure; the part combination containing in the backup pad can be directly as an integral component, installs at current control box internal surface, easy dismounting.
4) The power device adopts an electric cylinder, has the characteristic of stable work, and can be provided with a travel switch closed-loop control system, so that the movement is more accurate.
Drawings
FIG. 1 is an isometric schematic view of a dehumidification device of the present disclosure;
FIG. 2 is a top view of the dehumidifier station of the present invention in a first position;
FIG. 3 is a front view of the dehumidifier station of the present invention in a second position;
FIG. 4 is a top view of the dehumidification device of the present invention in a three-position station;
FIG. 5 is an overall schematic axial side view of a fully enclosed control cubicle incorporating the dehumidification device of the present disclosure;
fig. 6 is a schematic diagram of a control system of the dehumidifying apparatus of the present invention.
In the figure, a bottom plate of a cabinet body, a 2-heater, a 3-guide rail, a 4-sealing gasket, a 5-short stroke electric cylinder, a 6-supporting plate, a 7-axial flow fan, 8-screws, a 9-isolation net, a 10-long stroke electric cylinder, a 11-first sliding block, a 12-stroke switch, a 13-second sliding block, a 14-push rod connecting piece, a 15-cabinet body, a 16-four-way joint, a 17-exhaust branch pipe, a 18-corrugated hose, a 19-dehumidifier controller, a 20-wind collecting cover and a 21-humidity sensor.
Detailed Description
The dehumidifying device used in the totally-enclosed control cabinet is shown in figures 1, 2 and 5, wherein a ventilation hole is formed in the middle of a cabinet body bottom plate 1, and a guide rail 3, a heater 2 and a long-stroke electric cylinder 10 are arranged on the upper surface of the cabinet body bottom plate 1; the guide rail 3 is provided with a sliding block matched with the guide rail, the sliding block comprises a first sliding block 11 and a second sliding block 13 which are linearly distributed, and the first sliding block 11 and the second sliding block 13 are connected with the supporting plate 6 through screws. The push rod of the long-stroke electric cylinder 10 is connected with the side surface of the second slide block 13 through a push rod connecting piece 14, and the long-stroke electric cylinder 10 drives the support plate 6 and the slide block to do translational motion along the guide rail 3.
The support plate 6 is provided with a short-stroke electric cylinder 5 positioned above the support plate and an axial flow fan 7 positioned below the support plate, a push rod of the short-stroke electric cylinder 5 penetrates through the support plate 6 and then is connected with a sealing gasket 4 positioned below the support plate, the sealing gasket 4 is used for being matched with a vent hole, the sealing gasket 4 is driven to move up and down by the short-stroke electric cylinder 5, and the sealing gasket 4 is prevented from being contacted with the bottom plate 1 of the cabinet body when the support plate 6 and the sliding block translate; the supporting plate above the axial flow fan is provided with a through hole communicated with the air outlet of the axial flow fan; the axial fan 7 is fixedly connected with the support plate 6 through a screw 8. The supporting plate opposite to the vent hole is provided with a travel switch 12. The lower surface of the cabinet bottom plate 1 is provided with an isolation net 9 positioned right below the vent holes.
A ventilation assembly is arranged above the axial flow fan 7, and gas in the cabinet body 15 is sucked by the axial flow fan 7 through the ventilation assembly and is discharged out of the cabinet body. The ventilation assembly comprises a wind collecting cover 20 positioned right above the axial flow fan and a corrugated hose 18 connected with the wind collecting cover, wherein the corrugated hose 18 is connected with exhaust branch pipes 17 positioned at two sides of the corrugated hose through a four-way joint 16. The four corners of the wind collecting housing 20 are connected to the axial flow fan by bolts. The top of the bellows 18 is bolted to the top surface of the cabinet 15. The corrugated hose 18 and the exhaust branch pipe 17 are in a tree shape integrally.
The bottom surface and the top surface of the cabinet body 15 are respectively provided with a humidity sensor 21 for detecting the humidity in the cabinet body. The side of the cabinet 15 is provided with a dehumidifying device controller 19.
The working process of the dehumidifying device is as follows:
1. when the humidity in the control cabinet is within a specified range, as shown in fig. 2, the dehumidifying device is in a station one state. The sealing gasket 4 seals the vent holes to prevent convection of outside moist air. The axial fan 7 does not operate.
2. When the humidity sensor 21 in the control cabinet detects that the humidity exceeds the upper threshold, the dehumidifying device controller 19 sends out an instruction, the heater 2 starts to work, the short-stroke electric cylinder 5 works in a return mode to drive the sealing gasket 4 to lift, and the axial flow fan 7 still does not operate. As shown in fig. 3, the apparatus enters a station two state.
3. When the sealing gasket 4 reaches the position with the height H, the long-stroke electric cylinder 10 starts to return, the second sliding block 13 is driven by the push rod connecting piece 14 to move leftwards along the whole supporting plate 6, after moving for the distance with the length H, the travel switch 12 is triggered, the command is fed back to the dehumidifier controller, the dehumidifier controller 19 sends out a command, the long-stroke electric cylinder 10 immediately stops working, and at the moment, the axial flow fan 7 aims at the vent hole and starts to run to discharge moisture outside the control cubicle. As shown in fig. 4, the dehumidifying apparatus is in the station three state.
4. The temperature in the cabinet can be effectively accelerated to reduce through the heating of the heater 2 and the exhaust of the axial flow fan 7, when the humidity sensor 21 detects that the humidity meets the requirement, the dehumidifying device controller 19 sends out an instruction, the axial flow fan 7 stops working, the long-stroke electric cylinder 10 pushes the rod to work, the supporting plate 6 is pushed to return to the station two state, then the short-stroke electric cylinder 5 pushes the rod to work, the sealing gasket 4 is pushed to seal the vent hole again, and the station one state is returned.
Fig. 6 is a schematic diagram of a control system of the dehumidifying device, in which the small electric cylinder refers to a short-stroke electric cylinder, the large electric cylinder refers to a long-stroke electric cylinder, the heating device refers to a heater, and the fan refers to an axial fan.
The specific embodiments described herein are offered by way of illustration only. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions, without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (7)
1. The dehumidifying device used in the fully-sealed control cabinet comprises a cabinet body bottom plate (1) and is characterized in that a ventilation hole is formed in the middle of the cabinet body bottom plate (1), and a guide rail (3), a heater (2) and a long-stroke electric cylinder (10) are arranged on the upper surface of the cabinet body bottom plate (1); the guide rail (3) is provided with a sliding block matched with the guide rail, the top of the sliding block is connected with a supporting plate (6), a push rod of the long-stroke electric cylinder (10) is connected with the side face of the sliding block through a push rod connecting piece (14), and the supporting plate (6) and the sliding block are driven to do translational motion along the guide rail (3) through the long-stroke electric cylinder (10);
the support plate (6) is provided with a short-stroke electric cylinder (5) above the support plate and an axial flow fan (7) below the short-stroke electric cylinder, a push rod of the short-stroke electric cylinder (5) penetrates through the support plate (6) and then is connected with a sealing gasket (4) below the support plate, the sealing gasket (4) is used for being matched with a vent hole, the sealing gasket (4) is driven to move up and down through the short-stroke electric cylinder (5), and the sealing gasket (4) is prevented from being contacted with the bottom plate (1) of the cabinet body when the support plate (6) and the sliding block translate; the supporting plate above the axial flow fan is provided with a through hole communicated with the air outlet of the axial flow fan;
a ventilation assembly is arranged above the axial flow fan (7), and gas in the cabinet body (15) is sucked by the axial flow fan (7) through the ventilation assembly and is discharged out of the cabinet body;
the ventilation assembly comprises a wind collecting cover (20) positioned right above the axial flow fan and a corrugated hose (18) connected with the wind collecting cover, wherein the corrugated hose (18) is connected with exhaust branch pipes (17) positioned at two sides of the corrugated hose through a four-way joint (16);
the lower surface of the cabinet body bottom plate (1) is provided with an isolation net (9) positioned right below the vent hole;
the sliding block comprises a first sliding block (11) and a second sliding block (13) which are linearly distributed, the push rod connecting piece (14) is connected with the side face of the second sliding block (13), and the first sliding block (11) and the second sliding block (13) are connected with the supporting plate (6) through screws.
2. A dehumidifying device for use in fully enclosed cabinets according to claim 1, wherein the four corners of the collector hood (20) are bolted to the axial flow fan.
3. A dehumidifying device for use in a fully sealed sink control cabinet according to claim 1, wherein the top of the corrugated hose (18) is bolted to the top surface of the cabinet (15).
4. A dehumidifying device for use in a fully sealed sink according to claim 1, wherein the bellows (18) and the exhaust manifold (17) are dendritic in shape as a whole.
5. A dehumidifying device for use in fully enclosed cabinets according to any one of claims 1 to 4, wherein a travel switch (12) is mounted on the support plate directly opposite the vent.
6. A dehumidifying device for use in a fully enclosed sink control cabinet according to any one of claims 1 to 4, wherein the bottom and top surfaces of the cabinet (15) are each provided with a humidity sensor (21) for detecting the level of humidity within the cabinet.
7. A dehumidifying device for use in fully enclosed cabinets according to any one of claims 1 to 4, wherein a dehumidifying device controller (19) is mounted to the side of the cabinet (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811492800.4A CN109638657B (en) | 2018-12-07 | 2018-12-07 | Dehumidifying device used in fully-sealed control cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811492800.4A CN109638657B (en) | 2018-12-07 | 2018-12-07 | Dehumidifying device used in fully-sealed control cabinet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109638657A CN109638657A (en) | 2019-04-16 |
| CN109638657B true CN109638657B (en) | 2024-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811492800.4A Active CN109638657B (en) | 2018-12-07 | 2018-12-07 | Dehumidifying device used in fully-sealed control cabinet |
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| CN (1) | CN109638657B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110650615B (en) * | 2019-09-22 | 2020-08-18 | 安徽建筑大学 | Dampproofing electrical control cabinet who makes an uproar that falls |
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| US20140319984A1 (en) * | 2013-04-24 | 2014-10-30 | John N. Younts | Cabinet ventilation system |
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| CN109638657A (en) | 2019-04-16 |
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