CN109451704A - A kind of cabinet dewing-proof method and its device - Google Patents
A kind of cabinet dewing-proof method and its device Download PDFInfo
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- CN109451704A CN109451704A CN201811305155.0A CN201811305155A CN109451704A CN 109451704 A CN109451704 A CN 109451704A CN 201811305155 A CN201811305155 A CN 201811305155A CN 109451704 A CN109451704 A CN 109451704A
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- cabinet
- temperature
- cooling fin
- air draft
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- 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
- H05K7/20536—Modifications to facilitate cooling, ventilating, or heating for racks or cabinets of standardised dimensions, e.g. electronic racks for aircraft or telecommunication equipment
- H05K7/207—Thermal management, e.g. cabinet temperature control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B21/00—Machines, plants or systems, using electric or magnetic effects
- F25B21/02—Machines, plants or systems, using electric or magnetic effects using Peltier effect; using Nernst-Ettinghausen effect
Abstract
The present invention relates to a kind of cabinet dewing-proof method and its devices, device includes casing, the first~tri- cooling fin, refrigeration unit, heating unit, drainage cell and control unit, first cooling fin is set to the top of third cooling fin, second cooling fin is set to the side of the first and third cooling fin, heating unit is installed between the first and second cooling fin, refrigeration unit is installed between second and third cooling fin, and third cooling fin contacts the cold end of refrigeration unit, and the second cooling fin contacts the hot end of refrigeration unit；Drainage cell is installed on bottom in casing；The panel that the master board of refrigeration unit is installed on casing is inboard, and lower panels are equipped with fan；The connecting terminal of control unit is installed on the outside of casing.The present invention destroys dew-point temperature using heating and refrigerated dehumidification two ways, and environment temperature is made to keep off or be lower than dew-point temperature always, and the moisture in current environment air will not condense, and may not need artificial set temperature and humidity value, intelligent work.
Description
Technical field
The present invention relates to a kind of anti-condensation technology, specially a kind of cabinet dewing-proof method and its device.
Background technique
For a long time, China various regions weather multiplicity, local temperature and humidity is exceedingly fast with weather transformation variation, simultaneously because electrical outdoor
Gas equipment (terminal box, control cabinet, switchgear, power distribution cabinet etc.) this body structure, in addition poorly sealed, sealing strip aging, closure are not
Specification etc. factors, often will appear internal wetted, cabinet corrosion situations such as.The insulation distance of outdoor crate is compact, once dampness
It is wet, it just will appear power source trip, protection mistaking signal, the problems such as ground connection, shorten service life of equipment.If air too wet is led
Condensation is caused, the power supply short circuit even serious consequence of burning apparatus is also will cause, causes many hidden danger to equipment safety operation, also give
Equipment uses and maintenance personnel brings inconvenience.
At present for electrical equipment rack, China uses always temperature and humidity controller with the simple control of electric heater to realize
Heating and dehumidification prevents condensation from having more than ten years history, and this heating and dehumidification controller is in moisture-resistant profit, anti-condensation guarantee high-tension apparatus
Reliability service plays positive effect, but for sealing cabinet body, in air in the biggish situation of humidity, the south especially in China
Side and the places such as coastal area or tunnel, basement, are difficult to prove effective with traditional heating and air draft dehumanization method, or even accelerate electricity
The aging of gas apparatus body.
Existing dehumidification equipment but controls that simple, dehumidification mode is single, do not accomplish the variation with ambient temperature and humidity much and
Intelligence simultaneously starts dehumidifier using suitable dehumidification mode in time, cannot effectively dehumidify when very wet in cabinet, while existing removing
Wet device, regardless of condensing type still heats air draft type, it is passive-type that control, which all depends critically upon the detection data of condensation sensor,
Motion device, that is, when having to aerial vapour pressure saturation, that is, in body surface arrival dew-point temperature, condensation hair
Heating work can be just driven when raw, actually condensation sensor reliability is not high.Sometimes the air humidity of interior of equipment cabinet is higher,
The even existing dew condensation phenomenon in part, but there is no the journeys for reaching condensation for the condensation sensor position due to being mounted on interior of the cabinet
Degree, alternatively, condensation sensor makes the sensitivity of sensor be affected, condensation control for a long time by dust in air and gas attack
Device processed cannot start heater in time, and the effect failure for causing condensation to control is threatened to the safety belt of equipment in cabinet.
Anti-condensation is an important measures for ensureing equipment within machine cabinet safety, but existing control mode is all to detect out
It just starts to work when existing condensation, restarts heating close to the edge of condensation to eliminate condensation, just lack a prevention process, dehumidify
State seriously lags, not preparatory to judge automatically and prevent.From the point of view of safe and reliable angle, arranged as an anti-accident
It applies in reliability or far from being enough.Therefore, for the reliability that improves, operation power unit often uses some auxiliary
Means ensure that the safety of electric cabinet crosses flood, as used into the method for forcing long electrified regulation if into intermittent drizzles in the rainy season season.This method,
No doubt anti-condensation measure is strengthened, but also brings power consumption and waste.
Common dehumidification equipment all uses external sensor to measure ambient temperature and humidity, and field wiring is inconvenient.Meanwhile it is traditional
Dehumidifier control mode is by function button, and menu sets temperature and humidity value, and dehumidifier passes through control heater
And refrigerator, so that environment temperature is worked higher than set temperature and lower than the mode of setting humidity, this mode can not be complete
Solve the problems, such as equipment condensation, environment is empty in the case that environment temperature is higher than set temperature and ambient humidity lower than setting humidity
Between be also possible to condense, the electrical equipment or line node in environment space be also possible to condense and make moist, make electrical equipment or
Line node oxidation, leads to equipment accelerated ageing, or even have the danger of electric short circuit.
Summary of the invention
For in cabinet dehumidifier environment space in the prior art electrical equipment or line node may condense dampness, make
The deficiencies of electrical equipment or line node aoxidize, lead to equipment accelerated ageing, the technical problem to be solved in the present invention is to provide one
The cabinet dewing-proof method and its device of tide and anti-condensation ability are driven in kind enhancing.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
A kind of cabinet condensation-preventing device of the present invention, is installed in cabinet, including casing, be installed in casing the first~tri-
Cooling fin, refrigeration unit, heating unit, drainage cell and control unit, wherein the first cooling fin is set to third cooling fin
Top, the second cooling fin are set to the side of the first and third cooling fin, and heating unit is installed between the first and second cooling fin, and refrigeration is single
Member is installed between second and third cooling fin, and third cooling fin contacts the cold end of refrigeration unit, and the second cooling fin contacts refrigeration unit
Hot end；Drainage cell is installed on bottom in casing；The panel that the master board of refrigeration unit is installed on casing is inboard, under panel
Portion is equipped with fan；The connecting terminal of control unit is installed on the outside of casing.
The casing upper surface is equipped with air inlet, and lower end surface is equipped with the discharge outlet of drainage pipeline, corresponds to fan on casing
Position is equipped with air outlet.
The drainage cell includes catch basin and drainpipe, and wherein catch basin is funnel shaped, and funnel top water inlet is carried out
Cover second and third cooling fin bottom；Lower portion is drainpipe, is extended to outside casing by bottom of shell.
Control unit includes environment humidity sensor, heater/refrigerator temperature detection sensor, microprocessor, shows
Show device, fan control circuit, heater control loop and refrigerator control loop, wherein environment humidity sensor, heating
Device/refrigerator temperature detection sensor acquisition temperature signal is sent to microprocessor, and microprocessor exports control instruction to fan
In control loop, heater control loop and refrigerator control loop；Microprocessor is carried out by RS485 bus and host computer
Communication connection.
Also there is auxiliary heater, be installed on outside dehumidifier shell, in cabinet, the control loop and control of auxiliary heater
The output end of unit processed connects.
A kind of cabinet dewing-proof method of the present invention makes interior of equipment cabinet environment space by the way of welding dew point
Temperature is not up to dew-point temperature always, and electrical equipment or line node will not condense and make moist, comprising the following steps:
1) microprocessor is judged according to the temperature data that environment humidity sensor is sent, as environment temperature < in cabinet
30 DEG C, and the difference of environment temperature and the dew-point temperature of calculating be less than or equal to 3 DEG C when, into heating air draft mode, heating unit
Heater work, fan work, when the difference of environment temperature in cabinet and the dew-point temperature of calculating is more than or equal to 5 DEG C, heater
It stops working, fan delay working stops after 3 minutes；
2) when environment temperature >=30 DEG C in cabinet, and when the difference of environment temperature and the dew-point temperature of calculating is less than or equal to 3 DEG C, into
Enter to freeze air draft mode, the refrigerator work of refrigeration unit, fan work, until the difference of environment temperature and the dew-point temperature of calculating
When more than or equal to 5 DEG C, refrigerator stops working, and fan delay working stops after 3 minutes；
3) when dehumidifier is non-heated air draft mode and non-brake method air draft mode, every 8~12 minutes, fan period work
Make 3~5 minutes, environment humidity sensor acquires ambient temperature and humidity in cabinet, and microprocessor passes through RS485 bus for environment in cabinet
Temperature and humidity, current time and state of a control upload to host computer.
When dehumidifier is in heating air draft mode or refrigeration air draft mode, every 3~5 minutes by RS485 bus
Pass an environmental data, current time and state of a control.
Dehumidifier receives host computer instruction, including inquiry instruction and control instruction by RS485 bus with high priority；When
When receiving the control instruction of host computer, dehumidifier can stop itself control algolithm, by the control of fan, heater, refrigerator
Power gives host computer, is heating air draft mode or refrigeration air draft mode, and heating air draft mode or system by PC control
The cold air draft mode working time.
The invention also includes following steps:
After dehumidifier is to heat air draft mode or refrigeration air draft mode work, microprocessor starts timing, if heating
Air draft mode or refrigeration air draft mode were continued working more than 10 hours, and the difference of environment temperature and dew-point temperature is then reported still less than 3 DEG C
It is alert, and warning message is persistently uploaded by RS485 bus.
In step 1), the calculating of dew-point temperature is to utilize horse by the collected temperature of sensor and relative humidity data
Lars formula calculates the dew point temperature value of current environment, specifically:
101) air is in the water surface (t > 0 DEG C) or the saturated vapor pressure E of ice face (t≤0 DEG C) when calculating t DEG CS, formula
It is as follows:
Wherein, E0The saturated vapor pressure of air when being 0 DEG C, a, b are coefficient, and t is air themperature；
102) when calculating t DEG C, water vapor pressure E of the air at known relative humidity F%, formula is as follows:
E=ES×F×0.01
103) air dew point temperature T when calculating t DEG C, when relative humidity is F%d, formula is as follows:
The invention has the following beneficial effects and advantage:
1. the present invention destroys dew-point temperature using heating and refrigerated dehumidification two ways, keep off environment temperature always
Or it is lower than dew-point temperature, the moisture in current environment air will not condense, and may not need artificial set temperature and humidity value, intelligence
Work.
2. the present invention uses micro computer control, control model can automatically adjust according to environmental parameter, except having semiconductor cooling
It holds outside dehumidification mode, is also equipped with automatic heating and dehumidification, dehumidifying is forced in ventilation, the monitoring of cabinet internal-external temperature difference, Humidity Detection, long-range monitoring
Etc. functions, combine different dehumidification mode advantages, can intelligent decision and use most suitable dehumidification mode, adapt to it is round-the-clock entirely
Area's dehumidifying, and pre- anti-condensation cabinet dehumidifying product systems can be shifted to an earlier date and support exclusive data cloud storage monitor supervision platform, it can facilitate
The service condition and effect of user's real-time monitoring system.
3. the present invention use software control fan cycling, make sensor acquisition channel air formed flowing, take away by
The temperature rise caused by some device heatings such as circuit board enables the sensor to the practical temperature and humidity for accurately measuring environment.From
And solves the deficiency of mounting means built in sensor.
4. the present invention is widely used in high-low voltage electric power distribution cabinet, distribution box, electrical cabinet, terminal box, battry storage cabinet and outdoor communication
Cabinet etc. effectively solves the phenomenon that cabinet humidity is excessive or condensation generates potential faults or equipment corrosion, can prevent inside equipment
Insulate reduction, electrical discharge, electric connecting point oxidation, corrosion of metal, mechanism aging and it is mouldy phenomena such as.
Detailed description of the invention
Fig. 1 is cabinet condensation-preventing device panel construction schematic diagram；
Fig. 2 is cabinet condensation-preventing device schematic diagram of internal structure；
Fig. 3 is cabinet condensation-preventing device inner radiator arragement construction schematic diagram；
Fig. 4 is cabinet condensation-preventing device electrical structure block diagram.
Wherein, 1 is panel, and 2 be LED state indicator light, and 3 be data display instrument, and 4 be connecting terminal, and 5 be fan exhaust
Mouthful, 6 drain interfaces, 7 be the second cooling fin (cooling piece hot-side heat dissipation piece), and 8 be catch basin, and 9 be the first cooling fin, and 10 be the
Three cooling fins, 11 be PTC calandria, and 12 be TEC1 cooling piece.
Specific embodiment
The present invention is further elaborated with reference to the accompanying drawings of the specification.
As shown in Figures 1 to 3, a kind of cabinet condensation-preventing device of the present invention, is installed in cabinet, including casing, is installed on machine
The the first~tri- cooling fin, refrigeration unit, heating unit, drainage cell and control unit in shell, wherein the first cooling fin is set
In the top of third cooling fin, the second cooling fin is set to the side of the first and third cooling fin, and heating unit is installed on first and second and dissipates
Between backing, refrigeration unit is installed between second and third cooling fin, and third cooling fin contacts the cold end of refrigeration unit, and second dissipates
The hot end of backing contact refrigeration unit；Drainage cell is installed on bottom in casing；The master board of refrigeration unit is installed on casing
Panel it is inboard, the indicator light in control unit is installed on machine shell panel, and lower panels are equipped with fan；The wiring of control unit
Terminal is installed on the outside of casing.
Casing upper surface is equipped with air inlet, and lower end surface is equipped with the discharge outlet of drainage pipeline, the position of fan is corresponded on casing
Equipped with air outlet；Drainage cell includes catch basin and drainpipe, and wherein catch basin is funnel shaped, and funnel top water inlet carries out lid
Second and third cooling fin bottom；Lower portion is drainpipe, is extended to outside casing by bottom of shell.
The present invention uses identical air duct, realizes heating air draft mode and refrigeration two kinds of working methods of air draft mode.
In the present embodiment, cabinet condensation-preventing device outer dimension is only 170 × 100 × 72mm, be internally integrated heater,
Refrigerator, refrigeration and heat radiator, draught fan, air flow duct, control unit, numeral method unit (display environment temperature, environment
Humidity, the dew-point temperature of calculating, heater/refrigerator temperature), LED operation state indication unit, dual sensor component (including
Measure environment humidity sensor and monitoring heater and refrigerator temperature sensor), 485 communication units, data storage cell,
Clock unit (real-time time), water collector and drainage pipeline.
As shown in figure 4, control unit include environment humidity sensor, it is heater/refrigerator temperature detection sensor, micro-
Processor (MCU), display, fan control circuit, heater control loop and refrigerator control loop, wherein environment is warm and humid
Degree sensor, heater/refrigerator temperature detection sensor acquisition temperature signal are sent to microprocessor, microprocessor output control
System instruction is into fan control circuit, heater control loop and refrigerator control loop；Microprocessor passes through RS485 bus
Communication connection is carried out with host computer.
The present invention also has auxiliary heater, is installed in cabinet, the control loop and control unit of auxiliary heater
Output end connection.The electrical control cabinet big to space can match external heater, mention when dehumidifier heating power deficiency
High heating power is come the problem of supplementing large space underheat, it is only necessary to auxiliary at dehumidifier electric interfaces relevant pins external one
Help heater.
The present embodiment is by the way of built-in sensors, i.e. environment humidity sensor and heater/refrigerator temperature inspection
It surveys sensor to be laid in inside cabinet dehumidifier, facilitates field wiring installation.Generally use the modes of built-in sensors by
The measurement to actual environment of sensor can be generated heat and influence in some devices such as circuit board itself, the present invention uses software control
Fan cycling makes sensor acquisition channel air form flowing, takes away due to caused by some device heatings such as circuit board
Temperature rise enables the sensor to the practical temperature and humidity for accurately measuring environment, to solve mounting means built in sensor
It is insufficient.
A kind of cabinet dewing-proof method of the present invention makes interior of equipment cabinet environment space by the way of welding dew point
Temperature is not up to dew-point temperature always, and electrical equipment or line node will not condense and make moist, comprising the following steps:
1) microprocessor is judged according to the temperature data that environment humidity sensor is sent, as environment temperature < in cabinet
30 DEG C, and the difference of environment temperature and the dew-point temperature of calculating be less than or equal to 3 DEG C when, into heating air draft mode, heating unit
Heater work, fan work, when the difference of environment temperature in cabinet and the dew-point temperature of calculating is more than or equal to 5 DEG C, heater
It stops working, fan delay working stops after 3 minutes；
2) when environment temperature >=30 DEG C in cabinet, and when the difference of environment temperature and the dew-point temperature of calculating is less than or equal to 3 DEG C, into
Enter to freeze air draft mode, the refrigerator work of refrigeration unit, fan work, until the difference of environment temperature and the dew-point temperature of calculating
When more than or equal to 5 DEG C, refrigerator stops working, and fan delay working stops after 3 minutes；
3) when dehumidifier is non-heated air draft mode and non-brake method air draft mode, every 10 minutes, fan work 4 divided
Clock, with this time interval cycling, environment humidity sensor acquires ambient temperature and humidity in cabinet, and microprocessor passes through
Ambient temperature and humidity, current time and state of a control in cabinet are uploaded to host computer by RS485 bus.
When dehumidifier is in heating air draft mode or refrigeration air draft mode, one was uploaded by RS485 bus every 3 minutes
Secondary environment data, current time and state of a control.
After dehumidifier is to heat air draft mode or refrigeration air draft mode work, microprocessor starts timing, if heating
Air draft mode or refrigeration air draft mode were continued working more than 10 hours, and the difference of environment temperature and dew-point temperature is then reported still less than 3 DEG C
It is alert, and warning message is persistently uploaded by RS485 bus.At this point, 4 LED state lamp cycle alternation flashings, and buzzer rings
It cries.
Dehumidifier receives host computer instruction, including inquiry instruction and control instruction by RS485 bus with high priority；When
When receiving the control instruction of host computer, dehumidifier can stop itself control algolithm, by the control of fan, heater, refrigerator
Power gives host computer, is heating air draft mode or refrigeration air draft mode, and heating air draft mode or system by PC control
The cold air draft mode working time.4 LED state indicator lights of dehumidifier can flash jointly at this time, represent and take in host computer
Mode.
In step 1), the calculating of dew-point temperature is to utilize horse by the collected temperature of sensor and relative humidity data
Lars formula calculates the dew point temperature value of current environment, specifically:
101) air is in the water surface (t > 0 DEG C) or the saturated vapor pressure E of ice face (t≤0 DEG C) when calculating t DEG CS(pa),
Formula is as follows:
Wherein, E0The saturated vapor pressure of air when being 0 DEG C, value 611.2pa, a, b are coefficient, when t > 0 DEG C, are taken
The water surface value a=7.5, b=237.3；When t≤0 DEG C, fetch water face amount a=9.5, and b=265.5, t are air themperature；
102) when calculating t DEG C, water vapor pressure E (pa) of the air at known relative humidity F%, formula is as follows:
E=ES×F×0.01
103) air dew point temperature T when calculating t DEG C, when relative humidity is F%d, formula is as follows:
In the present embodiment, in core dehumidifying section, refrigeration unit uses TEC1 semiconductor chilling plate, and heating unit uses
The cold end of PTC calandria, TEC1 semiconductor refrigeration sheet is contacted with third cooling fin, and hot end is contacted with the second cooling fin；Air inlet,
Above-mentioned each cooling fin constitutes unique air duct through air outlet.
Heating air draft mode in step 1), heating unit work, blower is in air draft mode, at this time the first cooling fin,
Second cooling fin is hot end, and air passes to the second cooling fin through air duct after the heating of the first cooling fin and heats again, heats
Air afterwards is discharged by fan, this mode can quickly heat cabinet.Microprocessor with environment humidity sensor by being obtained
Environment temperature and humidity value, calculate the dew-point temperature of environment using Marasse formula, heat the operating condition of air draft mode:
Environment temperature-dew-point temperature < 3 DEG C, and environment temperature < 30 DEG C.
Refrigeration air draft mode in step 2), the work of cooling piece forward direction, blower are in air draft mode, at this time the first cooling fin
For cold end, the second cooling fin is hot end, and moisture passes through the first cooling fin, drains after condensation, the cold air after dehumidifier is passed through air duct
It to the second cooling fin, is excluded after heating by fan, while radiated for the second cooling fin, the dehumidifying of this mode energy maximal efficiency, together
Shi Jiare air improves saturated humidity.Cooling piece has cold and hot end, and the moisture in air, condensed water row are condensed by cold end
Outside cabinet body, to reduce the air humidity of interior of the cabinet.It is cold scattering piece that third cooling fin is practical when cooling piece works, and second dissipates
Backing is the cooling fin in cooling piece hot end.The operating condition for air draft mode of freezing: environment temperature-dew-point temperature < 3 DEG C, and environment
Temperature >=30 DEG C.
The present invention is using heating and refrigerated dehumidification two ways, to destroy dew-point temperature.As long as environment temperature does not connect always
Closely or it is lower than dew-point temperature, then the moisture in current environment air just never condenses.The machine developed using this principle
Cabinet dewing-proof method and device may not need artificial set temperature and humidity value, intelligent work.
Claims (10)
1. a kind of cabinet condensation-preventing device, is installed in cabinet, it is characterised in that: including casing, be installed in casing first
~tri- cooling fins, refrigeration unit, heating unit, drainage cell and control unit, wherein the first cooling fin radiates set on third
The top of piece, the second cooling fin are set to the side of the first and third cooling fin, and heating unit is installed between the first and second cooling fin, make
Cold unit is installed between second and third cooling fin, and third cooling fin contacts the cold end of refrigeration unit, the second cooling fin contact refrigeration
The hot end of unit；Drainage cell is installed on bottom in casing；The panel that the master board of refrigeration unit is installed on casing is inboard, face
Plate lower part is equipped with fan；The connecting terminal of control unit is installed on the outside of casing.
2. cabinet condensation-preventing device according to claim 1, it is characterised in that: the casing upper surface is equipped with air inlet,
Lower end surface is equipped with the discharge outlet of drainage pipeline, and the position that fan is corresponded on casing is equipped with air outlet.
3. cabinet condensation-preventing device according to claim 1, it is characterised in that: the drainage cell includes catch basin and row
Water pipe, wherein catch basin is funnel shaped, and funnel top water inlet, which is carried out, covers second and third cooling fin bottom；Lower portion is draining
Pipe, is extended to outside casing by bottom of shell.
4. cabinet condensation-preventing device according to claim 1, it is characterised in that: control unit includes ambient temperature and humidity sensing
Device, heater/refrigerator temperature detection sensor, microprocessor, display, fan control circuit, heater control loop with
And refrigerator control loop, wherein environment humidity sensor, heater/refrigerator temperature detection sensor acquisition temperature are believed
It number send to microprocessor, microprocessor exports control instruction to fan control circuit, heater control loop and refrigerator control
In circuit processed；Microprocessor carries out communication connection by RS485 bus and host computer.
5. cabinet condensation-preventing device according to claim 1, it is characterised in that: also there is auxiliary heater, be installed on
Outside dehumidifier shell, in cabinet, the control loop of auxiliary heater and the output end of control unit are connected.
6. cabinet dewing-proof method according to claim 1, it is characterised in that: by the way of welding dew point, make
The temperature of interior of equipment cabinet environment space is not up to dew-point temperature always, and electrical equipment or line node will not condense and make moist,
The following steps are included:
1) microprocessor is judged according to the temperature data that environment humidity sensor is sent, as environment temperature < 30 in cabinet
DEG C, and the difference of environment temperature and the dew-point temperature of calculating be less than or equal to 3 DEG C when, into heating air draft mode, heating unit plus
Hot device work, fan work, when the difference of environment temperature in cabinet and the dew-point temperature of calculating is more than or equal to 5 DEG C, heater stops
It only works, fan delay working stops after 3 minutes；
2) when environment temperature >=30 DEG C in cabinet, and when the difference of environment temperature and the dew-point temperature of calculating is less than or equal to 3 DEG C, into system
Cold air draft mode, the refrigerator work of refrigeration unit, fan work, until the difference of environment temperature and the dew-point temperature of calculating is greater than
When equal to 5 DEG C, refrigerator stops working, and fan delay working stops after 3 minutes；
3) when dehumidifier is non-heated air draft mode and non-brake method air draft mode, every 8~12 minutes, fan cycling 3
~5 minutes, environment humidity sensor acquired ambient temperature and humidity in cabinet, and microprocessor passes through RS485 bus for environment temperature in cabinet
Humidity, current time and state of a control upload to host computer.
7. cabinet dewing-proof method according to claim 6, it is characterised in that:
When dehumidifier is in heating air draft mode or refrigeration air draft mode, one was uploaded by RS485 bus every 3~5 minutes
Secondary environment data, current time and state of a control.
8. cabinet dewing-proof method according to claim 6, it is characterised in that: dehumidifier is by RS485 bus with Gao You
First grade receives host computer instruction, including inquiry instruction and control instruction；When receiving the control instruction of host computer, dehumidifier meeting
Stop itself control algolithm, give the control of fan, heater, refrigerator to host computer, is heating row by PC control
Wind mode is still freezed air draft mode, and heating air draft mode or refrigeration air draft mode working time.
9. cabinet dewing-proof method according to claim 6, it is characterised in that further comprising the steps of:
After dehumidifier is to heat air draft mode or refrigeration air draft mode work, microprocessor starts timing, if heating air draft
Mode or refrigeration air draft mode were continued working more than 10 hours, and the difference of environment temperature and dew-point temperature is then alarmed still less than 3 DEG C,
And warning message is persistently uploaded by RS485 bus.
10. cabinet dewing-proof method according to claim 6, it is characterised in that: in step 1), the calculating of dew-point temperature,
It is that the dew point temperature of current environment using Marasse formula, is calculated by the collected temperature of sensor and relative humidity data
Angle value, specifically:
101) air is in the water surface (t > 0 DEG C) or the saturated vapor pressure E of ice face (t≤0 DEG C) when calculating t DEG CS, formula is as follows:
Wherein, E0The saturated vapor pressure of air when being 0 DEG C, a, b are coefficient, and t is air themperature；
102) when calculating t DEG C, water vapor pressure E of the air at known relative humidity F%, formula is as follows:
E=ES×F×0.01
103) air dew point temperature T when calculating t DEG C, when relative humidity is F%d, formula is as follows:
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| CN201811305155.0A CN109451704A (en) | 2018-11-05 | 2018-11-05 | A kind of cabinet dewing-proof method and its device |
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| CN201811305155.0A CN109451704A (en) | 2018-11-05 | 2018-11-05 | A kind of cabinet dewing-proof method and its device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110625279A (en) * | 2019-09-28 | 2019-12-31 | 浙江泰好科技股份有限公司 | Anti-condensation device for laser equipment |
| CN111417288A (en) * | 2020-04-01 | 2020-07-14 | 常州常发制冷科技有限公司 | Overhead type electrical cabinet environment control method and system |
| CN112527032A (en) * | 2019-09-17 | 2021-03-19 | 北京金风科创风电设备有限公司 | Method, device and system for monitoring humidity of electric control cabinet |
| CN114401561A (en) * | 2022-01-18 | 2022-04-26 | 江苏沙子电器有限公司 | A waterproof structure of forming relieved tooth type for PTC heater and waterproof system thereof |
| CN115604965A (en) * | 2022-12-15 | 2023-01-13 | 南京积芯力科技有限公司（Cn） | Radio frequency power supply and temperature regulation and control method |
| WO2024008218A1 (en) * | 2023-03-13 | 2024-01-11 | 西安铁路信号有限责任公司 | Fireproof and explosion-proof device and method for box dehumidification, water removal and condensation prevention |
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| CN112527032A (en) * | 2019-09-17 | 2021-03-19 | 北京金风科创风电设备有限公司 | Method, device and system for monitoring humidity of electric control cabinet |
| CN110625279A (en) * | 2019-09-28 | 2019-12-31 | 浙江泰好科技股份有限公司 | Anti-condensation device for laser equipment |
| CN111417288A (en) * | 2020-04-01 | 2020-07-14 | 常州常发制冷科技有限公司 | Overhead type electrical cabinet environment control method and system |
| CN111417288B (en) * | 2020-04-01 | 2022-04-01 | 常州常发制冷科技有限公司 | Overhead type electrical cabinet environment control method and system |
| CN114401561A (en) * | 2022-01-18 | 2022-04-26 | 江苏沙子电器有限公司 | A waterproof structure of forming relieved tooth type for PTC heater and waterproof system thereof |
| CN114401561B (en) * | 2022-01-18 | 2023-08-15 | 江苏沙子电器有限公司 | Relieved tooth type waterproof structure for PTC heater and waterproof system thereof |
| CN115604965A (en) * | 2022-12-15 | 2023-01-13 | 南京积芯力科技有限公司（Cn） | Radio frequency power supply and temperature regulation and control method |
| CN115604965B (en) * | 2022-12-15 | 2023-03-07 | 南京积芯力科技有限公司 | Radio frequency power supply and temperature regulation and control method |
| WO2024008218A1 (en) * | 2023-03-13 | 2024-01-11 | 西安铁路信号有限责任公司 | Fireproof and explosion-proof device and method for box dehumidification, water removal and condensation prevention |
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