CN201312068Y - Switch cabinet intelligent temperature difference type anti condensation controller - Google Patents
Switch cabinet intelligent temperature difference type anti condensation controller Download PDFInfo
- Publication number
- CN201312068Y CN201312068Y CNU2008202169758U CN200820216975U CN201312068Y CN 201312068 Y CN201312068 Y CN 201312068Y CN U2008202169758 U CNU2008202169758 U CN U2008202169758U CN 200820216975 U CN200820216975 U CN 200820216975U CN 201312068 Y CN201312068 Y CN 201312068Y
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Abstract
The utility model discloses a switch cabinet intelligent temperature difference type anti condensation controller, comprising two cabinet internal temperature collection circuits, a cabinet external temperature collection circuit, a cabinet internal humidity collection circuit, a microprocessor, an alarm and display circuit, a heating control circuit, an exhaustion control circuit, a 485 interface circuit and a power circuit. The switch cabinet intelligent temperature difference type anti condensation controller mainly refers to condensation generation and prevention theories, not adopts traditional condensation controller, but utilizes the internal and external temperature sensors of a cabinet to adjust the difference between the internal and external temperatures of the switch cabinet, and keep the internal temperature higher than the external temperature by 1 to 3DEG C, thereby avoiding generation condition of condensation, to prevent switch cabinet from internal condensation; and the utility model adopts a humidity sensor in cabinet to measure and control the relative humidity in switch cabinet; therefore, the two methods can improve the anti condensation sensitivity of switch cabinet and confirm safe and reliable operation of high pressure equipment.
Description
Technical field
The utility model relates to the inner anti-condensation controller of a kind of switch cubicle, to ensure the power equipment safety reliability service.
Background technology
China adopts automatic heating and dehumidification controller to prevent that condensation from having more than ten years history in switch cubicle, this heating and dehumidification controller is wet in moisture resistance, anti-condensation assurance high-tension apparatus reliability service has played positive role, but in use in the area that has some problems have appearred also, for example: at southern plum rain season, sometimes the air humidity of switch cubicle inside is higher, even local existing dewfall phenomenon in the cabinet, because the condensation sensing station that is installed in cabinet inside does not arrive the degree of condensation, perhaps the condensation transducer is subjected to dust and gas pickling in the air for a long time, the sensitivity of transducer is affected, the condensation controller can not start heater in time, cause the effect of condensation control malfunctioning, bring threat for the safe operation of switchgear.
Usually the condensation controller that adopts on the market utilizes the condensation transducer to start or stop heater work automatically now, from its control mechanism, there are two defectives: the one, this condensation transducer is the passive-type motion device, when promptly must aerial vapour pressure saturated, just arrive dew point temperature at body surface, when taking place, condensation just can drive heating work, and it is anti-condensation as the anti-accident important measures of electric cabinet, restart heating near the edge of condensation and eliminate condensation, just lack a prevention process, from safety, angle is still far from being enough on reliability as an anti-accident measures reliably; The 2nd, if condensation transducer installation site is improper, characteristic changed after perhaps the surface of condensation transducer was subjected to the erosion of dust or gas, though the cabinet inner metal surface has the dewfall phenomenon, the condensation controller still can not in time start the heater input, also can have serious consequences.
For switch cubicle, the metalwork surface temperature drops to dew point temperature when following in the cabinet, and the metal surface can form the globule, and this phenomenon is called dewfall (or title condensation), whether dewfall depends on ambient temperature, and in-cabinet temperature and several variable quantity such as relative humidity, dew point temperature are determined.Dew point temperature is meant in the air of uniform temperature, the air that the maximum level of steam is called " saturated steam amount " this moment is called " saturated air ", and when saturation air temperature descends, airborne steam will condense into the globule, contain the saturation of the air temperature of steam, be called dew point temperature.The factor that forms dewfall in the switch cubicle easily mainly contains: (1) area surroundings humidity height, temperature Change is big, during cold and hot air exchange easily in the metal surface dewfall; (2) switch cubicle bottom is moist, even the cable trough that has has ponding, during water evaporation, when being lower than in the cabinet air themperature as metallic surface temperature, forms condensation in the metal surface; (3) equipment that has is in shut down condition, and in-cabinet temperature is lower than ambient temperature through regular meeting, causes that the metal surface has the globule to condense, and at this moment, in case switch cubicle puts into operation, accidents such as creepage, flashover takes place very easily.
The utility model content
Technical problem to be solved in the utility model is to take place and prevention mechanism according to condensation, no longer adopt traditional condensation transducer, but utilize in the temperature sensor by-pass cock cabinet cabinet that cabinet is interior and cabinet is outer and temperature difference method outside the cabinet, make in-cabinet temperature all the time than 3 ℃ of outer high 1 ∽ of temperature of cabinet, make and do not possess the condition that condensation takes place in the cabinet, play the inner effect that condensation takes place of prevention switch cubicle, in cabinet, adopt the relative humidity in humidity sensor measurement and the control switch cabinet simultaneously, two methods improves the anti-condensation sensitivity of switch cubicle greatly, guarantees the high-tension apparatus safe and reliable operation.
For solving the problems of the technologies described above, the utility model provides a kind of intelligent temperature difference type condensation-preventing controller for switchgear, comprises that humidity Acquisition Circuit, microprocessor, warning and display circuit, heating control circuit, air draft control circuit, 485 interface circuits and power circuit are formed in 2 in-cabinet temperature Acquisition Circuit, the outer temperature collection circuit of cabinet, the cabinet.
The output of in-cabinet temperature Acquisition Circuit is connected with the A/D mouth of microprocessor, the output of the outer temperature collection circuit of cabinet is connected with the A/D port of microprocessor, humidity Acquisition Circuit output is connected with the A/D port of microprocessor in the cabinet, the input of warning and display circuit is connected with the I/O mouth of microprocessor, the input of heating control circuit is connected with the I/O mouth of microprocessor, the input of air draft control circuit is connected with the I/O mouth of microprocessor, 485 interface circuits are connected with the serial ports of microprocessor, power circuit respectively with the in-cabinet temperature Acquisition Circuit, the outer temperature collection circuit of cabinet, humidity Acquisition Circuit in the cabinet, microprocessor, report to the police and display circuit, heating control circuit is connected with the air draft control circuit, for they provide power supply.
The utlity model has positive effect: (1) intelligent temperature difference type condensation-preventing controller for switchgear of the present utility model, utilize in the temperature sensor by-pass cock cabinet cabinet that cabinet is interior and cabinet is outer and temperature difference method outside the cabinet, make in-cabinet temperature all the time than 3 ℃ of outer high 1 ∽ of temperature of cabinet, make not possess the condition that condensation takes place in the cabinet, play the inner effect that condensation takes place of prevention switch cubicle.(2) intelligent temperature difference type condensation-preventing controller for switchgear of the present utility model adopts the relative humidity in humidity sensor measurement and the control switch cabinet in cabinet, replace the mode that tide is driven in long-term heating, has obviously energy-conservation effect.
Description of drawings
Fig. 1 is the intelligent temperature difference type condensation-preventing controller for switchgear structure principle chart of embodiment 1.
Embodiment
See shown in Figure 1, the intelligent temperature difference type condensation-preventing controller for switchgear of present embodiment comprises that humidity Acquisition Circuit, microprocessor, warning and display circuit, heating control circuit, air draft control circuit, 485 interface circuits and power circuit are formed in 2 in-cabinet temperature Acquisition Circuit, the outer temperature collection circuit of cabinet, the cabinet.
The outer temperature collection circuit of in-cabinet temperature Acquisition Circuit and cabinet all can adopt thermistor (10K Ω for example, 35K Ω), also can adopt digital temperature sensor (for example AD590, LM92), gather the switch cubicle internal and external temperature, according to the switch cubicle inside and outside temperature difference, control heater and fan work prevent to occur in the switch cubicle condensation, temperature-measuring range and precision: 0-80 ℃ ± the %+1 word.
The humidity Acquisition Circuit adopts humidity sensor in the cabinet, hygrometric scope and precision: 20%-98%RH ± 5% in the cabinet.
Heating control circuit adopts relay (relay contact power requirement: 220VAC/5A), send the work of control signal control heater by the temperature and humidity value of microprocessor collection, heating starting condition (wherein each satisfy promptly to start heating): during the outer temperature of (1) in-cabinet temperature one cabinet≤1 ℃; (2) during humidity in the cabinet＞70%RH; (3) during in-cabinet temperature≤5 ℃; (4) hand-operated forced heating.Heating stop condition (satisfy simultaneously following condition promptly stop heating): during the outer temperature of (1) in-cabinet temperature one cabinet＞2 ℃; (2) during in-cabinet temperature＞13 ℃; (3) during humidity in the cabinet≤60%RH.
The air draft control circuit adopts relay, and (the relay contact power requirement: 220VAC/5A), the temperature value by the microprocessor collection sends the work of control signal control air ejector fan, high temperature air draft entry condition: during in-cabinet temperature＞50 ℃; High temperature air draft stop condition: during in-cabinet temperature＜45 ℃.
485 interface circuits adopt baud rate 4800, MODBUS agreement.
Power circuit is made up of reduction voltage circuit, rectification circuit, filter circuit and voltage stabilizing circuit, and the input voltage range of power circuit is 220V ± 15%.
Microprocessor is selected PIC, NSP430,51 or AVR series etc. for use.
Claims (2)
1, intelligent temperature difference type condensation-preventing controller for switchgear, it is characterized in that, comprise that humidity Acquisition Circuit (4), microprocessor (5), warning and display circuit (6), heating control circuit (7), air draft control circuit (8), 485 interface circuits (9) and power circuit (10) are formed in in-cabinet temperature Acquisition Circuit (1), in-cabinet temperature Acquisition Circuit (2), the outer temperature collection circuit (3) of cabinet, the cabinet; The output of in-cabinet temperature Acquisition Circuit (1) is connected with the A/D mouth of microprocessor (5), the output of in-cabinet temperature Acquisition Circuit (2) is connected with the A/D port of microprocessor (5), the output of the outer temperature collection circuit (3) of cabinet is connected with the A/D port of microprocessor (5), humidity Acquisition Circuit (4) output is connected with the A/D port of microprocessor (5) in the cabinet, the input of warning and display circuit (6) is connected with the I/O mouth of microprocessor (5), the input of heating control circuit (7) is connected with the I/O mouth of microprocessor (5), the input of air draft control circuit (8) is connected with the I/O mouth of microprocessor (5), 485 interface circuits (9) are connected with the serial ports of microprocessor (5), power circuit (10) respectively with in-cabinet temperature Acquisition Circuit (1), in-cabinet temperature Acquisition Circuit (2), the outer temperature collection circuit (3) of cabinet, humidity Acquisition Circuit (4) in the cabinet, microprocessor (5), report to the police and display circuit (6), heating control circuit (7) is connected with air draft control circuit (8), for they provide power supply.
2, intelligent temperature difference type condensation-preventing controller for switchgear as claimed in claim 1, it is characterized in that, the outer temperature collection circuit (3) of in-cabinet temperature Acquisition Circuit (1), in-cabinet temperature Acquisition Circuit (2) and cabinet all can adopt thermistor, also can adopt digital temperature sensor, gather the switch cubicle internal and external temperature, according to the switch cubicle inside and outside temperature difference, control heater and fan work prevent to occur in the switch cubicle condensation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202169758U CN201312068Y (en) | 2008-11-20 | 2008-11-20 | Switch cabinet intelligent temperature difference type anti condensation controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202169758U CN201312068Y (en) | 2008-11-20 | 2008-11-20 | Switch cabinet intelligent temperature difference type anti condensation controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201312068Y true CN201312068Y (en) | 2009-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202169758U Expired - Fee Related CN201312068Y (en) | 2008-11-20 | 2008-11-20 | Switch cabinet intelligent temperature difference type anti condensation controller |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101788832A (en) * | 2010-03-11 | 2010-07-28 | 西安高度电子科技有限公司 | Integral and intelligent temperature and humidity monitoring controller |
| CN101957624A (en) * | 2010-09-21 | 2011-01-26 | 南车株洲电力机车研究所有限公司 | Method and system for controlling air dehumidifier of current transformer of wind power generator |
| CN102109862A (en) * | 2009-12-28 | 2011-06-29 | 鸿富锦精密工业（深圳）有限公司 | Temperature control circuit and electronic equipment with same |
| CN102478866A (en) * | 2010-11-29 | 2012-05-30 | 西安康瑞矿用设备有限公司 | Temperature and humidity controller used in high voltage equipment |
| CN101783482B (en) * | 2009-01-16 | 2012-09-05 | 常州帕斯菲克自动化技术有限公司 | Intelligent temperature difference type condensation-preventing controller for switchgear |
| CN102681574A (en) * | 2011-03-17 | 2012-09-19 | 鸿富锦精密工业（深圳）有限公司 | System and method for controlling constant temperature and humidity machine |
| CN103092234A (en) * | 2013-02-21 | 2013-05-08 | 哈尔滨电机厂有限责任公司 | Temperature and humidity control method of hydro-generator pit |
| CN103326258A (en) * | 2013-07-08 | 2013-09-25 | 万能亿自动化科技（苏州）有限公司 | Sealing switch cabinet capable of preventing condensation |
| CN103365322A (en) * | 2013-07-15 | 2013-10-23 | 国家电网公司 | Temperature and humidity automatic control system of outdoor switch cabinet |
| CN104597951A (en) * | 2015-02-11 | 2015-05-06 | 山东明科电气技术有限公司 | Temperature and humidity monitoring control device of air-cooled generator and monitoring control method of temperature and humidity monitoring control device |
| CN105071243A (en) * | 2015-08-19 | 2015-11-18 | 国网山东沂源县供电公司 | Dehumidifying switchgear capable of automatic air intake and discharge |
| CN105468056A (en) * | 2015-12-16 | 2016-04-06 | 大连尚能科技发展有限公司 | Anti-condensation converter for wind generating set and anti-condensation control method |
| CN105700581A (en) * | 2014-12-09 | 2016-06-22 | Abb技术有限公司 | A cooling system for a high voltage electromagnetic induction device, a system and a method of cooling the same |
| CN106354177A (en) * | 2016-08-31 | 2017-01-25 | 东软集团股份有限公司 | Method and device for controlling working environment of self-service terminal equipment |
| CN106451093A (en) * | 2016-11-17 | 2017-02-22 | 江苏智石科技有限公司 | Switch cabinet capable of regulating humidity in self-adaptation manner |
| CN106598116A (en) * | 2016-11-22 | 2017-04-26 | 深圳供电局有限公司 | Anti-condensation control method for power equipment box |
| CN107293944A (en) * | 2017-06-28 | 2017-10-24 | 四川亚润科技有限公司 | Anti-condensation monitoring system for transformer station |
| CN107516837A (en) * | 2017-09-15 | 2017-12-26 | 中铁工程装备集团盾构制造有限公司 | Shield machine frequency conversion tank dehydrating unit and its method |
| CN107741752A (en) * | 2017-11-10 | 2018-02-27 | 科棣姆（上海）电源科技有限公司 | A kind of condensation-proof heater for intermediate frequency plasma power supply |
| CN109449770A (en) * | 2018-11-20 | 2019-03-08 | 国网四川省电力公司泸州供电公司 | A kind of switching station's condensation-preventing device |
| CN112117665A (en) * | 2020-08-31 | 2020-12-22 | 国网安徽省电力有限公司六安供电公司 | Dehumidification control method and system for matching switchgear group |
-
2008
- 2008-11-20 CN CNU2008202169758U patent/CN201312068Y/en not_active Expired - Fee Related
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101783482B (en) * | 2009-01-16 | 2012-09-05 | 常州帕斯菲克自动化技术有限公司 | Intelligent temperature difference type condensation-preventing controller for switchgear |
| CN102109862B (en) * | 2009-12-28 | 2014-03-26 | 鸿富锦精密工业（深圳）有限公司 | Temperature control circuit and electronic equipment with same |
| CN102109862A (en) * | 2009-12-28 | 2011-06-29 | 鸿富锦精密工业（深圳）有限公司 | Temperature control circuit and electronic equipment with same |
| CN101788832A (en) * | 2010-03-11 | 2010-07-28 | 西安高度电子科技有限公司 | Integral and intelligent temperature and humidity monitoring controller |
| CN101957624A (en) * | 2010-09-21 | 2011-01-26 | 南车株洲电力机车研究所有限公司 | Method and system for controlling air dehumidifier of current transformer of wind power generator |
| CN101957624B (en) * | 2010-09-21 | 2012-06-27 | 南车株洲电力机车研究所有限公司 | Method and system for controlling air dehumidifier of current transformer of wind power generator |
| CN102478866A (en) * | 2010-11-29 | 2012-05-30 | 西安康瑞矿用设备有限公司 | Temperature and humidity controller used in high voltage equipment |
| CN102681574A (en) * | 2011-03-17 | 2012-09-19 | 鸿富锦精密工业（深圳）有限公司 | System and method for controlling constant temperature and humidity machine |
| CN103092234A (en) * | 2013-02-21 | 2013-05-08 | 哈尔滨电机厂有限责任公司 | Temperature and humidity control method of hydro-generator pit |
| CN103326258A (en) * | 2013-07-08 | 2013-09-25 | 万能亿自动化科技（苏州）有限公司 | Sealing switch cabinet capable of preventing condensation |
| CN103365322A (en) * | 2013-07-15 | 2013-10-23 | 国家电网公司 | Temperature and humidity automatic control system of outdoor switch cabinet |
| CN105700581A (en) * | 2014-12-09 | 2016-06-22 | Abb技术有限公司 | A cooling system for a high voltage electromagnetic induction device, a system and a method of cooling the same |
| CN104597951A (en) * | 2015-02-11 | 2015-05-06 | 山东明科电气技术有限公司 | Temperature and humidity monitoring control device of air-cooled generator and monitoring control method of temperature and humidity monitoring control device |
| CN105071243A (en) * | 2015-08-19 | 2015-11-18 | 国网山东沂源县供电公司 | Dehumidifying switchgear capable of automatic air intake and discharge |
| CN105468056A (en) * | 2015-12-16 | 2016-04-06 | 大连尚能科技发展有限公司 | Anti-condensation converter for wind generating set and anti-condensation control method |
| CN105468056B (en) * | 2015-12-16 | 2018-02-23 | 大连尚能科技发展有限公司 | A kind of wind power generating set anti-condensation current transformer and condensation prevention control method |
| CN106354177A (en) * | 2016-08-31 | 2017-01-25 | 东软集团股份有限公司 | Method and device for controlling working environment of self-service terminal equipment |
| CN106451093A (en) * | 2016-11-17 | 2017-02-22 | 江苏智石科技有限公司 | Switch cabinet capable of regulating humidity in self-adaptation manner |
| CN106598116A (en) * | 2016-11-22 | 2017-04-26 | 深圳供电局有限公司 | Anti-condensation control method for power equipment box |
| CN107293944A (en) * | 2017-06-28 | 2017-10-24 | 四川亚润科技有限公司 | Anti-condensation monitoring system for transformer station |
| CN107516837A (en) * | 2017-09-15 | 2017-12-26 | 中铁工程装备集团盾构制造有限公司 | Shield machine frequency conversion tank dehydrating unit and its method |
| CN107741752A (en) * | 2017-11-10 | 2018-02-27 | 科棣姆（上海）电源科技有限公司 | A kind of condensation-proof heater for intermediate frequency plasma power supply |
| CN107741752B (en) * | 2017-11-10 | 2023-05-05 | 科棣姆（上海）电源科技有限公司 | Anti-condensation heating device for medium-frequency plasma power supply |
| CN109449770A (en) * | 2018-11-20 | 2019-03-08 | 国网四川省电力公司泸州供电公司 | A kind of switching station's condensation-preventing device |
| CN112117665A (en) * | 2020-08-31 | 2020-12-22 | 国网安徽省电力有限公司六安供电公司 | Dehumidification control method and system for matching switchgear group |
| CN112117665B (en) * | 2020-08-31 | 2022-12-27 | 国网安徽省电力有限公司六安供电公司 | Dehumidification control method and system for matching switch cabinet group |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090916 Termination date: 20091221 |