CN104124626A - Clean and dry air exchange system of high-pressure cabinet - Google Patents
Clean and dry air exchange system of high-pressure cabinet Download PDFInfo
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- CN104124626A CN104124626A CN201410392159.2A CN201410392159A CN104124626A CN 104124626 A CN104124626 A CN 104124626A CN 201410392159 A CN201410392159 A CN 201410392159A CN 104124626 A CN104124626 A CN 104124626A
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Abstract
The invention provides a clean and dry air exchange system of a high-pressure cabinet. A shell of the clean and dry air exchange system is divided into two chambers partitioned in the middle by a partition and a dehumidifying wheel, a regeneration air inlet, a regeneration blower, a heater, a dry-air centrifugal blower and dry-air outlets are arranged in one of the chambers, a regeneration air outlet, a treated air inlet and a cooler are arranged in the other chamber, and the dry-air outlets are connected with a bottom inlet of the high-pressure cabinet through an air delivery pipeline. The shell is provided with a system control box. The dehumidifying wheel is partitioned into a treated air area and a regeneration air area. Positive pressure of air in the high-pressure cabinet is kept relative to the outside of the cabinet by continuously delivering dry air into the high-pressure cabinet through the air delivery pipeline. The clean and dry air exchange system has the advantages that humid air can be discharged out of the cabinet through seams and a pressure release passage of the cabinet by the aid of positive pressure of the dry air with ultralow dew point in the cabinet, water content of the air in the cabinet is thoroughly reduced, air humidity in the cabinet is thereby reduced, dew-point temperature is decreased and consequently condensation is avoided.
Description
Technical field
The present invention relates to a kind of airdryer, specifically the clean dry air switching system of a kind of high-voltage board.
Background technology
Present stage, switch cubicle drying method was various, have and in hyperbaric chamber, install dehumidifier additional, there is a heating and dehumidification device in traditional cabinet, have semiconductor demoistener, but effect is all not obvious, because merely rely on high-voltage board external environment condition, be in hyperbaric chamber, to install dehumidification equipment additional, in Huo switch gear room, place heater, or according to peltier effect, use special thermoelectric semiconductor material, manufacture semiconductor cooler dehumidifies all can not effectively stop moisture mistake in high-voltage board, forms condensation.Solve the problem of the too high and condensation of humidity in switch cubicle, only have a large amount of being discharged to cabinet and just can tackling the problem at its root outward of airborne steam in cabinet.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of clean dry air switching system of high-voltage board of safe, reliable, efficient rate to carry out the dehumidifying in high-voltage board.
According to technical scheme provided by the invention, the clean dry air switching system of described high-voltage board adopts desiccant wheel, and described desiccant wheel is separated into Liang Ge district: the regeneration air region of the processing air section of 270 degree sector regions and 90 degree sector regions, system casing is divided into two chambers, centre is separated by dividing plate and described desiccant wheel, one of them indoor regeneration air air inlet that is provided with, regeneration blower fan, heater, dry air centrifugal blower and dry air air outlet, another indoor regeneration air air outlet that is provided with, process air air inlet and cooler, regeneration air air inlet connects regeneration blower fan successively by pipeline, heater, the regeneration air region of desiccant wheel, regeneration air air outlet, process air air inlet and connect successively cooler by pipeline, the processing air section of desiccant wheel, dry air centrifugal blower and dry air air outlet, dry air air outlet connects high-voltage board bottom air entrance by gas pipeline, system control box is also set on system casing, includes controller, system control box is connected to CD-ROM drive motor, regeneration blower fan, heater, dry air centrifugal blower, the cooler of described desiccant wheel by cable, desiccant wheel, in dehumidification process, constantly slowly rotates, and when processing air section, absorbs or has adsorbed hydrone, becomes after saturation condition, will be automatically brought to regeneration air region, enters regenerative process, in regenerative process, regeneration air is after heating, enter regeneration air region, under the condition of high temperature, the hydrone of desiccant wheel absorption or absorption, by desorption, is lost in regeneration air, regeneration air is owing to having distributed heat in desorption process, self temperature reduces, and has become humid air, by regeneration air air outlet, drains into outside high-voltage board.
By gas pipeline is continual, in high-voltage board, carry dry air (gas pushing quantity per hour is 8～10 times of high-voltage board volume), guarantee that the relative cabinet of cabinet inner air pressure is malleation outward.
At described regeneration air air inlet and processing air air inlet, air filter unit is set respectively.
Described desiccant wheel 12～24 turning/hour rotational speed.Through regeneration blower fan, supercharging enters heater to regeneration air, and then air heat to 120 degree Celsius enters desiccant wheel regeneration air region.Processing air in high-voltage board enters into cooler through processing air air inlet, and humid air is cooled to 9 degree, then enters desiccant wheel and processes air section.
System is also included in the Mobile centrifugal blower fan arranging in high-voltage board, described Mobile centrifugal blower fan comprises the centrifugal blower of cabinet and cabinet inside, cabinet bottom has roller, cabinet bottom has air inlet, be connected to high-voltage board bottom air entrance, cabinet side has air outlet, and Temperature Humidity Sensor is installed on cabinet, and described centrifugal blower and Temperature Humidity Sensor are all connected to system control box by cable; By the real-time testing environment humiture of Temperature Humidity Sensor, when ambient temperature and humidity reaches alarming value, start centrifugal blower, air is entered to cabinet inside through bottom air inlet mouth, then by centrifugal blower supercharging, air is blown to body surface by air outlet high pressure.
Described gas pipeline has a plurality of gas outlets, and each gas outlet is provided with adjustable valve, and the control end of each adjustable valve is connected to system control box.According to the distance with air outlet from the near to the remote, described adjustable valve is opened, aperture is ascending, makes the air output of each gas outlet balanced.
Advantage of the present invention is: the malleation of the dry air by ultralow dew point in cabinet, humid air is discharged outside cabinet by cabinet gap and pressure release passage, thoroughly reduced the moisture of air in cabinet, thereby reduced air humidity in cabinet, reduce dew point temperature, thereby avoided the generation of condensation.
Accompanying drawing explanation
Fig. 1 is the clean dry air switching system of high-voltage board of the present invention structure chart.
Fig. 2 is Mobile centrifugal blower fan structure schematic diagram.
Fig. 3 is gas pipeline valve schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, system casing 11 is divided into two chambers, centre is separated by dividing plate and desiccant wheel 10, one of them indoor regeneration air air inlet 1 that is provided with, regeneration blower fan 6, heater 7, dry air centrifugal blower 8 and dry air air outlet 5, another indoor regeneration air air outlet 2 that is provided with, process air air inlet 3 and cooler 4, regeneration air air inlet 1 connects regeneration blower fan 6 successively by pipeline, heater 7, the regeneration air region of desiccant wheel 10, regeneration air air outlet 2, process air air inlet 3 and connect successively cooler 4 by pipeline, the processing air section of desiccant wheel 10, dry air centrifugal blower 8 and dry air air outlet 5, dry air air outlet 5 connects high-voltage board bottom air entrance by gas pipeline 12, at described regeneration air air inlet 1 and processing air air inlet 3, air filter unit is set respectively.System control box 9 is also set on system casing 11, includes controller, system control box 9 is connected to CD-ROM drive motor, regeneration blower fan 6, heater 7, dry air centrifugal blower 8, the cooler 4 of described desiccant wheel 10 by cable.
The clean dry air switching system of high-voltage board of the present invention adopts honeycomb rotor dehumidifier, comprise that the corrugated medium of being made by special composite heat resistance material (ceramic silica gel) forms, and be loaded with the cellular dry runner of drier, runner when rotated, continue to repeat moisture absorption regeneration action, do not affect Air Flow, the dry air of ultralow dew point is continuously provided.Desiccant wheel is divided into Liang Ge district by the dividing plate that contains high density packing material: processing air section is the sector region of 270 degree; Regeneration air region is 90 degree sector regions.
Desiccant wheel, in dehumidification process, constantly slowly rotates.When processing the runner 270 degree covering of the fans of air section, absorb or adsorbed hydrone, becoming after saturation condition, by being automatically brought to the 90 degree covering of the fans in regeneration air region, entering regenerative process.In regenerative process, regeneration air, after heating, enters rotary wheel regeneration district covering of the fan, and under the condition of high temperature, the hydrone of runner absorption or absorption, by desorption, is lost in regeneration air.Regeneration air is owing to having distributed heat in desorption process, and self temperature reduces, and has become the larger humid air of water capacity.Humid air is drained into outside high-voltage board by regeneration blower fan.
In the regenerative process of dehumidifying limit, above-mentioned limit, air constantly dehumidifies, and runner is constantly reproduced, so repeatedly, and continuous dehumidifying.The rotating speed of runner is very slow, generally 12～24 turning/hour rotational speed, energy consumption is minimum, the water capacity of processing air can be lower than 0.0007g/kg.
Through rotary dehumidifier dehumidifying, can remove in air 70% humidity, the dew point of the outlet air of rotary dehumidifier is lower 10～15 ℃ than the dew point of inlet air, can ensure that cabinet inner drying is without moisture, and avoids equipment oxidation.By continual, in high-voltage board, carry dry air (gas pushing quantity per hour is 8～10 times of high-voltage board volume), guarantee that the relative cabinet of cabinet inner air pressure is malleation outward, even if consider the leakage of the pressure release hole on cabinet surface, the dry air of sending into still can utilize gap and the hole of each bin dividing plate in cabinet, from arrival switch gear room, cable vault, secondary device chamber and the bus-bar room of bottom, guarantee in high-voltage board without dead angle.
Workflow is:
1, through regeneration blower fan, 6 superchargings enter heater 7 to regeneration air, and then air heat enters desiccant wheel 90 degree sector regions to 120 degree left and right, and the systemic moisture of desiccant wheel 10 is taken out of by high temperature air, by regeneration air air outlet 2, discharges.
2, the humid air in high-voltage board enters into cooler 4 through processing air air inlet 3, humid air is cooled to 9 degree left and right, then enter desiccant wheel 270 degree sector regions, by desiccant wheel 10 by the moisture absorption in humid air (in embodiment runner constantly slowly rotate 15～18 turn/hour), the dry air that goes out desiccant wheel 10 enters gas pipeline by dry air air outlet 5 after centrifugal blower 8 superchargings, then enters high-voltage board bottom inlet.
This method effect on moisture extraction is obvious, can obviously reduce relative humidity and dew point temperature in cabinet, avoids the generation of condensation, and decapacitation reduces air humidity, prevents from, outside condensation generation, can also effectively preventing equipment component oxidation; Operating temperature range is wide, can, under subzero 30 ℃ of states, continue to carry out dehumidifying work.
As shown in Figure 2, system is also included in the Mobile centrifugal blower fan arranging in high-voltage board, described Mobile centrifugal blower fan comprises the centrifugal blower of cabinet 14 and cabinet 14 inside, cabinet 14 bottoms have roller 16, cabinet 14 bottoms have air inlet 14-1, are connected to high-voltage board bottom air entrance, and cabinet 14 sides have air outlet 14-2, Temperature Humidity Sensor 15 is installed on cabinet 14, and described centrifugal blower and Temperature Humidity Sensor 15 are all connected to system control box 9 by cable; By the real-time testing environment humiture of Temperature Humidity Sensor 15, when ambient temperature and humidity reaches alarming value, start centrifugal blower, air is entered to cabinet 14 inside through bottom air inlet mouth 14-1, then by centrifugal blower supercharging, air is blown to body surface by air outlet 14-2 high pressure.
Described gas pipeline 12 has a plurality of gas outlets, and each gas outlet is provided with adjustable valve 13, and the control end of each adjustable valve 13 is connected to system control box 9.According to the distance with air outlet from the near to the remote, described adjustable valve 13 is opened, aperture is ascending.As shown in Figure 3, in embodiment, gas pipeline 12 length is 50 meters, has 5 air outlets, is respectively equipped with an adjustable valve 13,0.4 meter of valve maximum opening.By Distance Gas Pipeline air outlet from the near to the remote, 5 adjustable valves are opened, the opening of opening valve is respectively 60%, 70%, 80%, 90%, 100%, can guarantee to greatest extent that like this air output of each gas outlet is balanced when gas pipeline is supplied gas.
Therefore, the present invention has applied in the process that cellular silica gel runner carries out moisture absorption synchronously the processed of regenerating of the adsorbent after moisture absorption, can be recycled, whole moisture absorption work can be carried out continuously, overcome compressor-type dehumidifier (just can not work below for about 10 ℃) can not continuous dehumidifying and in low temperature and low humidity situation helpless shortcoming.This system can be operated under subzero 30 ℃ of states, can continue dehumidifying work; Dew point that cooling and dehumidifying mode cannot the realize dry air in the ultralow humidity below 10 ℃ can be provided continuously.The present invention is simple in structure, and drive control part is simple, only needs desiccant wheel, regeneration heater and forced draft fan running, can obtain dry air, so simple to operate.In addition, it belongs to dry type dehumidification type, and without supplementary hygroscopic agent, maintenance guarantee is convenient; Under clean air ambient, the performance of desiccant wheel can decline or degenerate hardly, can be competent at continuous operation all the year round.
Claims (10)
1. the clean dry air switching system of high-voltage board, comprise desiccant wheel (10), described desiccant wheel (10) is separated into Liang Ge district: the regeneration air region of the processing air section of 270 degree sector regions and 90 degree sector regions, it is characterized in that: system casing (11) is divided into two chambers, centre is separated by dividing plate and described desiccant wheel (10), one of them indoor regeneration air air inlet (1) that is provided with, regeneration blower fan (6), heater (7), dry air centrifugal blower (8) and dry air air outlet (5), another indoor regeneration air air outlet (2) that is provided with, process air air inlet (3) and cooler (4), regeneration air air inlet (1) connects regeneration blower fan (6) successively by pipeline, heater (7), the regeneration air region of desiccant wheel (10), regeneration air air outlet (2), process air air inlet (3) and connect successively cooler (4) by pipeline, the processing air section of desiccant wheel (10), dry air centrifugal blower (8) and dry air air outlet (5), dry air air outlet (5) connects high-voltage board bottom air entrance by gas pipeline (12), system control box (9) is also set on system casing (11), include controller, system control box (9) is connected to CD-ROM drive motor, regeneration blower fan (6), heater (7), dry air centrifugal blower (8), the cooler (4) of described desiccant wheel (10) by cable, desiccant wheel (10), in dehumidification process, constantly slowly rotates, and when processing air section, absorbs or has adsorbed hydrone, becomes after saturation condition, will be automatically brought to regeneration air region, enters regenerative process, in regenerative process, regeneration air is after heating, enter regeneration air region, under the condition of high temperature, the hydrone of desiccant wheel (10) absorption or absorption, by desorption, is lost in regeneration air, regeneration air is owing to having distributed heat in desorption process, self temperature reduces, and has become humid air, by regeneration air air outlet (2), drains into outside high-voltage board.
2. the clean dry air switching system of high-voltage board as claimed in claim 1, it is characterized in that, also be included in the Mobile centrifugal blower fan arranging in high-voltage board, described Mobile centrifugal blower fan comprises cabinet (14) and the inner centrifugal blower of cabinet (14), cabinet (14) bottom has roller (16), cabinet (14) bottom has air inlet (14-1), be connected to high-voltage board bottom air entrance, cabinet (14) side has air outlet (14-2), Temperature Humidity Sensor (15) is installed on cabinet (14), described centrifugal blower and Temperature Humidity Sensor (15) are all connected to system control box (9) by cable, by the real-time testing environment humiture of Temperature Humidity Sensor (15), when ambient temperature and humidity reaches alarming value, start centrifugal blower, air is entered to cabinet (14) inside through bottom air inlet mouth (14-1), then by centrifugal blower supercharging, air is blown to body surface by air outlet (14-2) high pressure.
3. the clean dry air switching system of high-voltage board as claimed in claim 1, is characterized in that, by gas pipeline (12) is continual, in high-voltage board, carries dry air, guarantees that the relative cabinet of cabinet inner air pressure is malleation outward.
4. the clean dry air switching system of high-voltage board as claimed in claim 3, is characterized in that, gas pushing quantity per hour is 8～10 times of high-voltage board volume.
5. the clean dry air switching system of high-voltage board as claimed in claim 1, it is characterized in that, described gas pipeline (12) has a plurality of gas outlets, and each gas outlet is provided with adjustable valve (13), and the control end of each adjustable valve (13) is connected to system control box (9).
6. the clean dry air switching system of high-voltage board as claimed in claim 5, is characterized in that, according to the distance with air outlet from the near to the remote, described adjustable valve is opened, aperture is ascending, makes the air output of each gas outlet balanced.
7. the clean dry air switching system of high-voltage board as claimed in claim 1, is characterized in that, at described regeneration air air inlet (1) and processing air air inlet (3), air filter unit is set respectively.
8. the clean dry air switching system of high-voltage board as claimed in claim 1, is characterized in that, described desiccant wheel (10) 12～24 turning/hour rotational speed.
9. the clean dry air switching system of high-voltage board as claimed in claim 1, is characterized in that, through regeneration blower fan (6), supercharging enters heater (7) to regeneration air, and then air heat to 120 degree Celsius enters desiccant wheel (10) regeneration air region.
10. the clean dry air switching system of high-voltage board as claimed in claim 1, it is characterized in that, processing air in high-voltage board enters into cooler (4) through processing air air inlet (3), and humid air is cooled to 9 degree, then enters desiccant wheel (10) and processes air section.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410392159.2A CN104124626B (en) | 2014-08-11 | 2014-08-11 | High-voltage board clean dry air exchange system |
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| CN201410392159.2A CN104124626B (en) | 2014-08-11 | 2014-08-11 | High-voltage board clean dry air exchange system |
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| CN104124626A true CN104124626A (en) | 2014-10-29 |
| CN104124626B CN104124626B (en) | 2016-07-06 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742978A (en) * | 2016-02-26 | 2016-07-06 | 国家电网公司 | Dedusting and dehumidification device for power distribution cabinet |
| CN105811275A (en) * | 2016-04-19 | 2016-07-27 | 国家电网公司 | Rotary dehumidifier-type condensation dehumidification device for metal-clad equipment and control method of rotary dehumidifier-type condensation dehumidification device |
| CN106025874A (en) * | 2016-07-28 | 2016-10-12 | 七星电气股份有限公司 | Box type switching station dehumidification device |
| CN108767669A (en) * | 2018-08-01 | 2018-11-06 | 广东电网有限责任公司 | A kind of Novel switch cabinet damp-proof device and system |
| CN109494592A (en) * | 2018-11-28 | 2019-03-19 | 贵州电网有限责任公司 | Electric panel room inner-outer circulation control device and its control method in a kind of substation |
| CN110071429A (en) * | 2019-05-29 | 2019-07-30 | 湖北中巽泰科技有限公司 | A kind of passive multi-compartment anti-condensation control system and its control method |
| CN113211968A (en) * | 2021-05-21 | 2021-08-06 | 广州锦创节能科技有限公司 | Drying system of ink printing machine |
| CN113410785A (en) * | 2021-05-31 | 2021-09-17 | 无锡东瑞电力科技有限公司 | Clean dry air exchange system of high-voltage board |
| CN113739311A (en) * | 2021-08-27 | 2021-12-03 | 北京工业大学 | Utility tunnel entrance section anti-condensation air supply device and implementation method |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742978A (en) * | 2016-02-26 | 2016-07-06 | 国家电网公司 | Dedusting and dehumidification device for power distribution cabinet |
| CN105811275A (en) * | 2016-04-19 | 2016-07-27 | 国家电网公司 | Rotary dehumidifier-type condensation dehumidification device for metal-clad equipment and control method of rotary dehumidifier-type condensation dehumidification device |
| CN106025874A (en) * | 2016-07-28 | 2016-10-12 | 七星电气股份有限公司 | Box type switching station dehumidification device |
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| CN110071429B (en) * | 2019-05-29 | 2023-07-28 | 湖北中巽泰科技有限公司 | Passive multi-interval condensation prevention control system and control method thereof |
| CN110071429A (en) * | 2019-05-29 | 2019-07-30 | 湖北中巽泰科技有限公司 | A kind of passive multi-compartment anti-condensation control system and its control method |
| CN113211968A (en) * | 2021-05-21 | 2021-08-06 | 广州锦创节能科技有限公司 | Drying system of ink printing machine |
| CN113410785A (en) * | 2021-05-31 | 2021-09-17 | 无锡东瑞电力科技有限公司 | Clean dry air exchange system of high-voltage board |
| CN113739311B (en) * | 2021-08-27 | 2022-07-19 | 北京工业大学 | Utility tunnel entrance section anti-condensation air supply device and implementation method |
| CN113739311A (en) * | 2021-08-27 | 2021-12-03 | 北京工业大学 | Utility tunnel entrance section anti-condensation air supply device and implementation method |
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