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 PDF

Info

Publication number
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
Authority
CN
China
Prior art keywords
temperature
humidity
cabinet
mcu
humidity sensor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710970268.1A
Other languages
Chinese (zh)
Inventor
秦勇
黄海斌
胡新雨
吴辰玥
秦益东
旋永东
秦钰涵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Nantong Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Nantong Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Nantong Power Supply Co of State Grid Jiangsu Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201710970268.1A priority Critical patent/CN107765743A/en
Publication of CN107765743A publication Critical patent/CN107765743A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D27/00Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
    • G05D27/02Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00Programme-control systems
    • G05B19/02Programme-control systems electric
    • G05B19/04Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0421Multiprocessor system
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05FSYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00Automatic 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
    • G05F1/66Regulating electric power
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05FSYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00Automatic 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
    • G05F1/70Regulating power factor; Regulating reactive current or power
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00Program-control systems
    • G05B2219/20Pc systems
    • G05B2219/22Pc multi processor system
    • G05B2219/2214Multicontrollers, multimicrocomputers, multiprocessing
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00Program-control systems
    • G05B2219/20Pc systems
    • G05B2219/26Pc applications
    • G05B2219/2614HVAC, heating, ventillation, climate control

Landscapes

  • 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

Power auto-adjustment type switch cubicle temperature and humidity control device based on temperature difference control
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.
CN201710970268.1A 2017-10-18 2017-10-18 Power auto-adjustment type switch cubicle temperature and humidity control device based on temperature difference control Pending CN107765743A (en)

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

Publications (1)

Publication Number Publication Date
CN107765743A true CN107765743A (en) 2018-03-06

Family

ID=61269326

Family Applications (1)

Application Number Title Priority Date Filing Date
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

Country Status (1)

Country Link
CN (1) CN107765743A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202583923U (en) * 2012-05-03 2012-12-05 长春工程学院 Fuzzy power-adjusting condensation controller
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202583923U (en) * 2012-05-03 2012-12-05 长春工程学院 Fuzzy power-adjusting condensation controller
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

Cited By (5)

* Cited by examiner, † Cited by third party
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
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
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
CN112965549B (en) * 2021-02-09 2022-03-01 杭州小电科技股份有限公司 Constant temperature control system and constant temperature control method

Similar Documents

Publication Publication Date Title
CN107765743A (en) Power auto-adjustment type switch cubicle temperature and humidity control device based on temperature difference control
US9448263B2 (en) Power quality monitoring apparatus for railway power system
CN106487279A (en) High power density motor servo driver
CN103207633B (en) A kind of temperature and humidity monitor method and system
CN106438311A (en) Intelligent controller used for variable-frequency constant-pressure water-supply water pump and control method for intelligent controller
WO2010030837A2 (en) Outdoor enclosure cooling system operating at off-peak hours
CN207488864U (en) Power auto-adjustment type switchgear temperature and humidity control device based on temperature difference control
CN102269464B (en) Delayed protection method for air conditioner
CN102345912B (en) SVG (static var generator) room temperature control system
CN201312067Y (en) Prefabricated substation utilizing temperature and humidity automatic control system
CN204945842U (en) A kind of temperature controller
CN206146465U (en) Box transformer monitoring device
CN205880566U (en) High voltage isolator intelligence control system of transformer substation
CN104502649A (en) Low-power consumption single-phase intelligent power meter
CN202383544U (en) Temperature and humidity monitoring device for electricity metering tank
CN101710247A (en) Timing constant temperature controller
CN204330838U (en) A kind of low-power consumption single-phase intelligent electric energy meter
CN105425029A (en) Low-power-consumption single-phase smart electric energy meter
CN108897351A (en) The temperature control system and control method of greenhouse
CN102541123A (en) Novel temperature/humidity controller
CN202002205U (en) Intelligent electric heating furnace
CN105514720A (en) Intelligent socket group control system based on internet of things
CN201464868U (en) Power tool cabinet intelligent monitoring device with power-off protection function
CN207600509U (en) A kind of diaper sensor
CN201242566Y (en) Electric energy meter

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20180306

RJ01 Rejection of invention patent application after publication