CN107765743A - Power auto-adjustment type switch cubicle temperature and humidity control device based on temperature difference control - Google Patents
Power auto-adjustment type switch cubicle temperature and humidity control device based on temperature difference control Download PDFInfo
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- CN107765743A CN107765743A CN201710970268.1A CN201710970268A CN107765743A CN 107765743 A CN107765743 A CN 107765743A CN 201710970268 A CN201710970268 A CN 201710970268A CN 107765743 A CN107765743 A CN 107765743A
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- humidity sensor
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0421—Multiprocessor system
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/66—Regulating electric power
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/70—Regulating power factor; Regulating reactive current or power
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/22—Pc multi processor system
- G05B2219/2214—Multicontrollers, multimicrocomputers, multiprocessing
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2614—HVAC, heating, ventillation, climate control
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Electromagnetism (AREA)
- Radar, Positioning & Navigation (AREA)
- Power Engineering (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of Power auto-adjustment type switch cubicle temperature and humidity control device based on temperature difference control, including Temperature Humidity Sensor outside Temperature Humidity Sensor in cabinet, cabinet, the outer Temperature Humidity Sensor of Temperature Humidity Sensor, cabinet is connected with temperature and humidity controller in cabinet, temperature and humidity controller is connected with air draft heater, and Switching Power Supply provides power supply for temperature and humidity controller.Switch cubicle temperature and humidity control device of the present invention is easy for installation, operation is flexible, reduce the power equipment caused by humidity and damage accident, inspection and maintenance workload are reduced, while improves power supply reliability and sale of electricity prestige and electricity sales amount, there is important economy and social effect.
Description
Technical field
The present invention relates to a kind of switch cubicle temperature and humidity control device.
Background technology
Condensation is a kind of physical phenomenon extremely widespread in nature, when with the body surface of air contact less than air
During temperature, then dew condensation phenomenon will occur for surface.
In the case of ambient temperature, humidity change acutely, dew condensation phenomenon can also occur for inside switch cabinet, and may cause
Endanger below.
（1）The corrosion such as operating mechanism, secondary device in cabinet, go mouldy, reduce service life of equipment.
（2）DC earthing, cause protection device malfunction or tripping.
（3）The screw of terminal block, connection sheet cause loose contact because getting rusty so that secondary circuit is opened a way, and protection device is refused
Dynamic or malfunction etc..
At present to switch cubicle dehumidifying using in the built-in temperature and humidity controller control heater work of cabinet, such mode
Dew condensation phenomenon still can be produced when difference variation is big, being unable to reach prevents condensation of switch cabinet phenomenon, so unscientific heating
On the one hand method causes high energy consumption, on the other hand also causes local temperature high, accelerate insulation and the aging of electrical equipment.
How to prevent switch cubicle from having been become due to electric power accident caused by dew condensation phenomenon in face of power supply enterprise one is difficult
Topic.
The content of the invention
It is an object of the invention to provide a kind of Power auto-adjustment type switch based on temperature difference control of favorable working performance
Cabinet temperature and humidity control device.
The present invention technical solution be：
A kind of Power auto-adjustment type switch cubicle temperature and humidity control device based on temperature difference control, it is characterized in that：Including warm in cabinet
The outer Temperature Humidity Sensor of humidity sensor, cabinet, Temperature Humidity Sensor, the outer Temperature Humidity Sensor of cabinet and temperature and humidity controller company in cabinet
Connect, temperature and humidity controller is connected with air draft heater, and Switching Power Supply provides power supply for temperature and humidity controller；Humiture in the cabinet
Sensor includes the first high-accuracy temperature-humidity sensor, the first MCU, the first RS485 communication modules, and the first high-accuracy temperature-humidity passes
Sensor is connected with the first MCU, and the first MCU is connected with the first RS485 communication modules；The outer Temperature Humidity Sensor of the cabinet includes second
High-accuracy temperature-humidity sensor, the 2nd MCU, the 2nd RS485 communication modules, the second high-accuracy temperature-humidity sensor and the 2nd MCU
Connection, the 2nd MCU are connected with the 2nd RS485 communication modules；The temperature and humidity controller includes the MCU of temperature and humidity controller, temperature
The MCU of humidity controller is connected to clock chip, storage chip, liquid crystal display, setting button, current acquisition module, RS485 buses
And PWM output units；The air draft heater includes heater and turbofan；
The operating current of the current acquisition module collection air draft heater of temperature and humidity controller, is sentenced by the MCU of temperature and humidity controller
Other air draft heater whether normal work；
The RS485 buses of temperature and humidity controller are connected with the first RS485 communication modules, the 2nd RS485 communication modules, by cabinet
The outer humiture information of interior humiture information, cabinet is transmitted to the MCU of temperature and humidity controller；By the MCU of temperature and humidity controller for relative
Dew-point temperature under humiture controls the heating power of heater using different PWM so that can not meet condensation condition in cabinet.
Temperature and humidity controller is installed on switch cabinet panel, a diameter of 25mm of panel cut out circular hole, by circular hole electricity
Source line and control line are connected in the equipment in cabinet.
The air draft heater, heater include stainless steel casing, set in stainless steel casing ptc heater and turbine from
Heart fan.
The liquid crystal display is 3.2 cun of chromatic liquid crystal screens.
The first high-accuracy temperature-humidity sensor is high-accuracy temperature-humidity sensor Si7021.
The second high-accuracy temperature-humidity sensor is high-accuracy temperature-humidity sensor Si7021.
The invention has the advantages that after the design for passing through new equipment, switch cubicle temperature and humidity control device is easy for installation, behaviour
Make flexibly, to reduce the power equipment caused by humidity and damage accident, reduce inspection and maintenance workload, while improve confession
Electric reliability and sale of electricity prestige and electricity sales amount, there is important economy and social effect, there is ten hundreds of transformer stations at present,
There is large number of switch cubicle in each transformer station, has the huge market demand, economic benefit and social benefit are all considerable.
The device is easy to operate, dependable performance, energy-conservation, solves the electric power safety accident caused by equipment condensation, improves confession
The reliability of electric equipment.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the structural representation of one embodiment of the invention.
Fig. 2 is clock circuit schematic diagram.
Fig. 3 is storage chip circuit diagram.
Fig. 4 is current acquisition module circuit diagram.
Fig. 5 is RS485 bus circuit figures.
Fig. 6 is solid-state relay control circuit.
Embodiment
A kind of Power auto-adjustment type switch cubicle temperature and humidity control device based on temperature difference control, including humiture passes in cabinet
The outer Temperature Humidity Sensor of sensor, cabinet, Temperature Humidity Sensor, the outer Temperature Humidity Sensor of cabinet are connected with temperature and humidity controller in cabinet, warm
Humidity controller is connected with air draft heater, and Switching Power Supply provides power supply for temperature and humidity controller；Temperature and humidity sensing in the cabinet
Device includes the first high-accuracy temperature-humidity sensor, the first MCU, the first RS485 communication modules, the first high-accuracy temperature-humidity sensor
It is connected with the first MCU, the first MCU is connected with the first RS485 communication modules；It is high-precision that the outer Temperature Humidity Sensor of the cabinet includes second
Temperature Humidity Sensor, the 2nd MCU, the 2nd RS485 communication modules are spent, the second high-accuracy temperature-humidity sensor is connected with the 2nd MCU,
2nd MCU is connected with the 2nd RS485 communication modules；The temperature and humidity controller includes the MCU of temperature and humidity controller, humiture control
The MCU of device processed is connected to clock chip, storage chip, liquid crystal display, setting button, current acquisition module, RS485 buses and PWM
Output unit；The air draft heater includes heater and turbofan.
（1）, temperature and humidity controller part design
Temperature and humidity controller by microcontroller, LCD MODULE, clock unit, memory cell, current acquisition unit,
The module compositions such as RS485 buses, PWM controls output, system setting unit.
Each functional module technical principle is as follows：
1）, microprocessing unit MCU
It is common using macrocrystalline science and technology high speed/low-power consumption/superpower jamproof MCU-STC12LE5A60S2 of new generation, its speed ratio
Fast 8-12 times of MCU.2 road PWM, 8 road 10-bit high speed A/D change (250K/S).
2）Clock
Specification：
DS1302 trickle charge clock chips, a kind of high-performance, the real-time timepiece chip of low-power consumption, it is static to add 31 bytes
RAM, synchronized and communicated with CPU using SPI three-wire interfaces, and burst mode can be used once to transmit the clock of multiple bytes and believed
Number and RAM data.Real-time clock can provide the second, point, when, day, week, Month And Year, it is one month small with 31 days when can adjust automatically
It is whole, and there is leap year compensation function.Using dual power supply（Main power source and stand-by power supply）, stand-by power supply charging side can be set
Formula, there is provided the ability of trickle current charging is carried out to back power supply.To the temperature and humidity in time recording cabinet, outside cabinet
Value.
3）Storage
Using advanced ferroelectricity technique.One ferroelectric RAM or FRAM are non-volatile and perform reading and write picture
Internal memory.It provides reliable data and retained, while eliminates complexity, and caused system-level reliability problem
EEPROM and other nonvolatile memory current charges ability.
Humiture historical data inside and outside device record cabinet, in order to which patrol officer can check the humiture situation of switch cubicle.
With the working condition of device.
4）Current acquisition
Specification：
The malfunction of heater can not be known because air draft heater is installed on inside switch cabinet, during patrol officer's inspection
Information, the operating current of current acquisition heater, to discriminate whether normal work.
Current signal is gathered by current transformer, then the voltage signal amplification collected is then sent through by amplifier by MCU
AD collection port, because MCU carries 10 A/D chips, so saving AD gathers this block circuit, MCU directly reads voltage data
Enter and analyzed.
5）RS485 communication protocols
Specification：
Differential signal A1, B1 meet a fuse SMD005 respectively, and it can protect SP3485 chips, and differential signal connects and connect respectively
One SMBJ-5V voltage-stabiliser tube, by difference over the ground between voltage clamping in 5V, prevent pulse signal from damaging other electronics member
Part.MCU is by RS485 the numerical value of Temperature Humidity Sensor is read in cabinet and outside cabinet.
6）PWM control outputs
Heating power for the dew-point temperature under relative humiture using different PWM control heaters, such as：Relative
25 DEG C/humidity of temperature 90%RH 23.2 DEG C of dew-point temperature, solid-state relay is controlled to adjust the operating power of heater so that
Dew-point temperature is more than 23.2 DEG C in cabinet so that can not meet condensation condition in cabinet.
Heating power is modulated using 5 kinds of gears.Its by control heating heating cycle and heating dutycycle come
Realize, the solid-state relay that control circuit uses switches heater power source, solid-state relay（SSR）It is a kind of all electronic circuit
The element of combination, it completes its isolation and relay switching work(by the electromagnetism and light characteristic of semiconductor devices and electronic component
Energy.Solid-state relay is a kind of without machinery, the relay without motion parts compared with traditional electromagnetic relay, but
With with electromagnetic relay substantially identical function.It is widely used in industrial automatic control, it is ripe such as electric furnace heating system
Control machinery, robot, motor, magnetic valve and signal lamp, scintillator, stage light control system, medicine equipment, are duplicated
Machine, washing machine, fire-fighting security system etc. have extensive application.Reliable operation, contactless, no-spark, long lifespan, noiseless, nothing
Electromagnetic interference, switching speed is fast, and MCU reaches the purpose of direct drive large current load with small control signal.
（2）, the outer Temperature Humidity Sensor part design of Temperature Humidity Sensor, cabinet in cabinet
The part includes：The outer Temperature Humidity Sensor of Temperature Humidity Sensor, cabinet is sensed by microprocessing unit, high-accuracy temperature-humidity in cabinet
Device, RS485 communication modules, power-switching circuit.
Specification：
By sampling the temperature and humidity value inside and outside cabinet, dew point value is calculated to control heater, and according to dew point curve, control adds
Hot device, temperature and humidity value in cabinet is set within the dew point temperature value under relative humiture, to make that condensation condition can not be met in cabinet.
1）High-accuracy temperature-humidity sensor：
This items selection uses the high-accuracy temperature-humidity sensor Si7021 of import calibration-free.It is a number with I2C interface
Word formula Temperature Humidity Sensor, MCU read temperature and humidity by I2C buses and error of the analog chip by AD conversion are not present.
2）Power convert：
Because power supply is supplied by external switch power supply, it is 3.3V to input as 12V voltages, processor operating voltage, so needing
A efficient power supply changeover device carries out voltage conversion.
MC33063 monolithic DC-DC converters are employed, a small amount of outer member of converter adapted can form efficiency high and reach
93% reducing transformer, the circuit input voltage scope are 5-40V, and output current reaches 1.5A, and has current limit function.
（3）, air draft heater section design
Air draft heater is made up of ptc heater and turbine centrifugal fan.
1st, specification
1）Ptc heater：Using the heating element heater ptc heater of thermostatic type, small volume, its constant temperature warming, thermal conversion rate be high, by
Supply voltage influences the features such as minimum, natural life-span is long.
2）Turbine centrifugal fan：Turbine centrifugal fan can realize side air-out, quicker by air in circulating tank
Equal control dew-point temperature.
3）Shell：Shell uses 304 stainless steels, the permanent non-corrosive of shell is remain brand-new state, shelling machine
Multiple mounting modes supports, may be mounted in side wall to be arranged in cabinet interior base.
2nd, application method
1）Heater is installed into fixed support, 2 M4 hole is made a call in switch cubicle side wall, is fixed heater with M4 screw
In the side wall of switch cubicle.
2）Temperature Humidity Sensor is installed in cabinet：Fixed guide rail is fixed in the side wall on other one side of switch cubicle, then will
Temperature Humidity Sensor is stuck on guide rail in cabinet, screws on fixed fastener.
The outer Temperature Humidity Sensor installation of cabinet：Same guide rail of first fixing is fixed on guide rail in cabinet door, then by sensor.
The installation of controller：25mm circular hole is opened in cabinet door again, then opens 2 4mm holes, screwing on fixed screw will control
Device is directly hung on screw.
The fixation of Switching Power Supply：Rail type switch power supply is fixed in switch cubicle instrument bin by guide rail.
After above equipment installation, the line of Temperature Humidity Sensor inside and outside air draft heater, cabinet, Switching Power Supply is connected on control
On device processed.
Equipment automatic running after energization, main interface understand temperature and humidity value and running status rank inside and outside display case.
Claims (6)
1. a kind of Power auto-adjustment type switch cubicle temperature and humidity control device based on temperature difference control, it is characterized in that：Including in cabinet
The outer Temperature Humidity Sensor of Temperature Humidity Sensor, cabinet, Temperature Humidity Sensor, the outer Temperature Humidity Sensor of cabinet and temperature and humidity controller in cabinet
Connection, temperature and humidity controller are connected with air draft heater, and Switching Power Supply provides power supply for temperature and humidity controller；It is warm and humid in the cabinet
Spending sensor includes the first high-accuracy temperature-humidity sensor, the first MCU, the first RS485 communication modules, the first high-accuracy temperature-humidity
Sensor is connected with the first MCU, and the first MCU is connected with the first RS485 communication modules；The outer Temperature Humidity Sensor of the cabinet includes the
Two high-accuracy temperature-humidity sensors, the 2nd MCU, the 2nd RS485 communication modules, the second high-accuracy temperature-humidity sensor and second
MCU connections, the 2nd MCU are connected with the 2nd RS485 communication modules；The temperature and humidity controller includes the MCU of temperature and humidity controller,
The MCU of temperature and humidity controller is connected to clock chip, storage chip, liquid crystal display, sets button, current acquisition module, RS485 total
Line and PWM output units；The air draft heater includes heater and turbofan；
The operating current of the current acquisition module collection air draft heater of temperature and humidity controller, is sentenced by the MCU of temperature and humidity controller
Other air draft heater whether normal work；
The RS485 buses of temperature and humidity controller are connected with the first RS485 communication modules, the 2nd RS485 communication modules, by cabinet
The outer humiture information of interior humiture information, cabinet is transmitted to the MCU of temperature and humidity controller；By the MCU of temperature and humidity controller for relative
Dew-point temperature under humiture controls the heating power of heater using different PWM so that can not meet condensation condition in cabinet.
2. the Power auto-adjustment type switch cubicle temperature and humidity control device according to claim 1 based on temperature difference control, its
It is characterized in：Temperature and humidity controller is installed on switch cabinet panel, a diameter of 25mm of panel cut out circular hole, by circular hole power supply
Line and control line are connected in the equipment in cabinet.
3. the Power auto-adjustment type switch cubicle temperature and humidity control device according to claim 1 based on temperature difference control, its
It is characterized in：The air draft heater, heater include stainless steel casing, set in stainless steel casing ptc heater and turbine from
Heart fan.
4. the Power auto-adjustment type switch cubicle temperature and humidity control device according to claim 1 based on temperature difference control, its
It is characterized in：The liquid crystal display is 3.2 cun of chromatic liquid crystal screens.
5. the Power auto-adjustment type switch cubicle temperature and humidity control device according to claim 1 based on temperature difference control, its
It is characterized in：The first high-accuracy temperature-humidity sensor is high-accuracy temperature-humidity sensor Si7021.
6. the Power auto-adjustment type switch cubicle temperature and humidity control device according to claim 1 based on temperature difference control, its
It is characterized in：The second high-accuracy temperature-humidity sensor is high-accuracy temperature-humidity sensor Si7021.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710970268.1A CN107765743A (en) | 2017-10-18 | 2017-10-18 | Power auto-adjustment type switch cubicle temperature and humidity control device based on temperature difference control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710970268.1A CN107765743A (en) | 2017-10-18 | 2017-10-18 | Power auto-adjustment type switch cubicle temperature and humidity control device based on temperature difference control |
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| Publication Number | Publication Date |
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| CN107765743A true CN107765743A (en) | 2018-03-06 |
Family
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|---|---|---|---|
| CN201710970268.1A Pending CN107765743A (en) | 2017-10-18 | 2017-10-18 | Power auto-adjustment type switch cubicle temperature and humidity control device based on temperature difference control |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110523239A (en) * | 2019-08-16 | 2019-12-03 | 玉溪易和环境技术有限公司 | A kind of medical waste high temperature plasma exhaust gas processing device |
| CN110764558A (en) * | 2019-10-17 | 2020-02-07 | 上海方德自动化设备股份有限公司 | Intelligent respirator and control method thereof |
| CN112965549A (en) * | 2021-02-09 | 2021-06-15 | 杭州小电科技股份有限公司 | Constant temperature control system and constant temperature control method |
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| CN102904180A (en) * | 2012-10-24 | 2013-01-30 | 四川省电力公司绵阳电业局 | Heat dissipation control device of switch cabinet |
| CN103760936A (en) * | 2014-01-28 | 2014-04-30 | 北京泽源惠通科技发展有限公司 | Intelligent condensation-preventing environment regulating and controlling device |
| CN203982237U (en) * | 2014-07-17 | 2014-12-03 | 福州大学 | The anti-condensation supervising device of transformer station |
| CN207488864U (en) * | 2017-10-18 | 2018-06-12 | 国网江苏省电力公司南通供电公司 | Power auto-adjustment type switchgear temperature and humidity control device based on temperature difference control |
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2017
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Patent Citations (5)
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| CN202583923U (en) * | 2012-05-03 | 2012-12-05 | 长春工程学院 | Fuzzy power-adjusting condensation controller |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110523239A (en) * | 2019-08-16 | 2019-12-03 | 玉溪易和环境技术有限公司 | A kind of medical waste high temperature plasma exhaust gas processing device |
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| CN110764558B (en) * | 2019-10-17 | 2021-12-10 | 上海方德自动化设备股份有限公司 | Intelligent respirator and control method thereof |
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Application publication date: 20180306 |
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