CN104377938B - A kind of frequency converter cooling system - Google Patents
A kind of frequency converter cooling system Download PDFInfo
- Publication number
- CN104377938B CN104377938B CN201410711013.XA CN201410711013A CN104377938B CN 104377938 B CN104377938 B CN 104377938B CN 201410711013 A CN201410711013 A CN 201410711013A CN 104377938 B CN104377938 B CN 104377938B
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- Prior art keywords
- frequency converter
- export
- plc
- cold drawing
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
-
- 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
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20281—Thermal management, e.g. liquid flow control
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Power Engineering (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The present invention provides a kind of frequency converter cooling system, electric heater is added on the basis of traditional frequency conversion device, first temperature sensor and second temperature sensor are set respectively at the import and export of cold drawing, the arrival end of circulating pump connects the port of export of cold drawing, the port of export of circulating pump connects the entrance of electromagnetic three-way ratio adjusting valve, electric heater in the first outlet end connection frequency converter box body of electromagnetic three-way ratio adjusting valve, fin outside second outlet end connection frequency converter, the port of export of electric heater and the port of export of fin are together connected to the entrance point of cold drawing；Also include PLC, the input of the Analog input mModule of PLC connects the first temperature sensor and second temperature sensor, the output end control connection electromagnetic three-way ratio adjusting valve and cooling fan of PLC respectively.The present invention can effectively realize the dual-use function for being cooled down and being heated to cooling water, make the application of frequency converter more extensive.
Description
Technical field
The application is related to frequency converter field, more particularly to a kind of frequency converter cooling system.
Background technology
With the fast development of Power Electronic Technique, the application of frequency converter is also increasingly extensive.Frequency converter can operationally be produced
Raw substantial amounts of heat, to ensure the normal work of frequency converter, need in real time be cooled down to frequency converter.Cooling to frequency converter at present
Frequently with water cooling or air-cooled mode, but the cooling effect of both types of cooling is unsatisfactory, and its internal cooling wind
Fan, which is constantly in, operates at full capacity, and energy consumption is excessive；Simultaneously as the workplace of frequency converter is different with season, if environment temperature
Less than the normal working temperature of frequency converter, frequency converter cannot normally start.
A kind of frequency converter heat radiation cooling system and its control method and device are disclosed in the prior art（The patent No.
CN103095098A）Including first detection module, for detecting the first temperature；First judge module, for judging the first temperature
Whether preset temperature is more than；First control module, for the first temperature be more than preset temperature when, control valve open, wherein,
Valve is arranged in the medium pipeline of system, and when valve is in open mode, cooling medium is in frequency converter heat radiation cooling system
Middle circulation；And second control module, for when the first temperature is less than or equal to preset temperature, control valve to be closed, wherein,
When valve is closed, cooling medium is static in frequency converter heat radiation cooling system.
A kind of frequency converter cooling system is also disclosed in the prior art（Patent No. CN202550864U）, including frequency converter,
Cabinet top fan, indoor airduct, airduct elbow, outdoor air conduit, air exhauster, Water-cooled cabinet, cooling tower, the frequency converter are arranged on room
Interior, top is provided with cabinet top fan, and cabinet top fan is connected with indoor airduct, indoor airduct, airduct elbow, outdoor air conduit, water cooling
Cabinet is sequentially connected, and described Water-cooled cabinet is connected with cooling tower.
Above two cooling system is attained by the cooling requirements of frequency converter, and is mutually tied to related automatic control system
Close, according to different actual conditions, using different radiating modes, serve the effect of energy-saving and emission-reduction.But it is due to frequency converter
Application scenario widely, in some extremely frigid zones or winter temperature lower ground area, once environment temperature is less than frequency conversion
The normal working temperature of device, frequency converter cannot normally start；For this problem, current technology simply to frequency converter around
Air heated, air and coolant are then subjected to heat exchange, frequency converter is reached start-up temperature, but this sides
Method is not only slow, and heats uneven, it is difficult to get a desired effect.Can not be normal currently for frequency converter at low ambient temperatures
The problem of startup and frequency converter energy consumption are big, not yet proposes that effective method is come while solving the two problems.
The content of the invention
It is an object of the invention to provide a kind of frequency converter cooling system, it can effectively realize and cooling water is cooled down
With the dual-use function of heating, make the application of frequency converter more extensive, while making the energy consumption of system smaller.
To achieve the above object, the present invention is adopted the following technical scheme that：
A kind of frequency converter cooling system, including the cold drawing that is arranged in frequency converter box body and be arranged on outside frequency converter
Circulating pump, cooling fan and fin, are connected between the cold drawing, circulating pump and fin by coolant circulation passage,
Electric heater is additionally provided with inside the frequency converter, the first temperature sensor is respectively arranged with the import and export of the cold drawing
And second temperature sensor, the arrival end of the circulating pump connects the port of export of cold drawing, and the port of export of the circulating pump passes through cold
But liquid circulation passage connects the entrance of electromagnetic three-way ratio adjusting valve, and the first outlet end of the electromagnetic three-way ratio adjusting valve connects
Connect the fin outside the electric heater in frequency converter box body, second outlet end connection frequency converter, the outlet of the electric heater
The port of export of end and the fin is together connected to the entrance point of cold drawing by coolant circulation passage；Also include PLC to control
Device, the input of the Analog input mModule of the PLC connects the first temperature sensor and second temperature sensing respectively
Device, the output end control connection electromagnetic three-way ratio adjusting valve and cooling fan of the PLC.
The output end of the PLC connects cooling fan control relay and electromagnetic three-way ratio adjusting valve respectively
Coil, the normally opened contact of the cooling fan control relay is arranged between power supply and cooling fan controlled motor.
The cooling fan has three.
The output end of the PLC is additionally provided with warning device.
The present invention adds the heater of an intelligent control on the basis of original water cooling plant, according in frequency converter
Actual temperature take refrigerating mode or heating mode, environment temperature can be solved well less than frequency converter running temperature time-varying
The problem of frequency device can not normally start；Electromagnetic three-way ratio is controlled according to the actual temperature in frequency converter when frequency converter needs cooling
Example regulating valve adjusts the circulation ratio of coolant and the operation quantity of cooling fan, and fast and effectively frequency converter can be carried out
Cooling, and reduce energy consumption；Simultaneously by detecting frequency converter coolant inlet temperature, outlet temperature, it can interpolate that in frequency converter
Whether portion breaks down, and reminds staff to be overhauled in time by warning device.Present invention can ensure that frequency converter can
Applied to different occasions, it is ensured that the frequency converter moment is operated in safe and reliable running status.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is PLC of the present invention circuit connection diagram；
Fig. 3 is PLC of the present invention Analog input mModule circuit diagram；
Fig. 4 is the electric operation control circuit figure of cooling fan of the present invention.
Embodiment
As shown in figure 1, the present invention includes circulating pump 1, electromagnetic three-way ratio adjusting valve 2, the first temperature sensor 3, second
Temperature sensor 4, cooling fan 5, fin 6, electric heater 7, cold drawing 9 and PLC, the electric heater 7 and cold drawing 9
In frequency converter 8, with cooling liquid bath in the cold drawing 9, the power model of frequency converter 8 is arranged on the surface of cold drawing 9, coolant
After the heat of cold drawing 9 is taken away frequency converter 8 is flowed out along coolant circulation passage 10；Set respectively at the import and export of cold drawing 9
There are the first temperature sensor 3 and second temperature sensor 4, when frequency converter is not actuated, the first temperature sensor 3 and second temperature are passed
What sensor 4 was detected is environment temperature；During frequency converter normal work, what the first temperature sensor 3 was detected is through frequency converter
The temperature of coolant after heating, what second temperature sensor 4 was detected is the temperature of the coolant after cooling down；In cold drawing 9
Exit by coolant circulation passage 10 connect be located at frequency converter 8 outside circulating pump 1, circulating pump 1 be high speed centrifugation leaf
Piece pump, can provide power for closed coolant circulation, and the port of export of circulating pump 1 connects electricity by coolant circulation passage 10
Electrical heating in the entrance of magnetic threeway ratio adjusting valve 2, the first outlet end connection frequency converter 8 of electromagnetic three-way ratio adjusting valve 2
Fin 6 outside device 7, second outlet end connection frequency converter 8, is additionally provided with three cooling fans 5, electricity adds at fin 6
Hot 7 port of export and the port of export of fin 6 are together connected to the entrance point of cold drawing 9 by coolant circulation passage 10.
Shown as shown in Figure 2, Figure 3 and Figure 4, present invention additionally comprises PLC, the Analog input mModule of PLC
EM231 input connects the first temperature sensor 3 and second temperature sensor 4 respectively, and the output end of PLC connects respectively
Connect electromagnetic three-way ratio adjusting valve 2 and relay KA1, KA2, KA3 coil, relay KA1, KA2, KA3 normally opened contact point
Cooling fan controlled motor 1,2 and 3 is not connected by fuse FR1, FR2, FR3, PLC by control relay KA1,
KA2, KA3 coil obtain it is whether electric control the closing of its normally opened contact, so as to control the operation of cooling fan.
The present invention operationally, is passed according to the first temperature sensor 3 of the coolant import and export of frequency converter 8 and second temperature
The temperature that sensor 4 is detected, PLC is controlled to electromagnetic three-way ratio adjusting valve 2 and cooling fan 5, makes 8 moment of frequency converter work
Make in safe and reliable state.
When environment temperature is relatively low, and frequency converter 8 can not normally start, the of electromagnetic three-way ratio adjusting valve 2 is controlled by PLC
Two ports of export are closed, and first outlet end is opened completely, and the circulation ratio of coolant is adjusted into 100% passes through electric heater 7, makes
Frequency converter 8 reaches cranking temperature；
When 8 normal work of frequency converter, it is necessary to carry out temperature control to coolant, make the temperature of the power model of frequency converter 8
Degree is remained in permission temperature range, and the coolant temperature detected according to temperature sensor 3 and 4 controls electromagnetism by PLC
Threeway ratio adjusting valve 2 come adjust coolant pass through fin 6 ratio, coolant is entered by fin 6 and cooling fan 5
Row cooling.Three cooling fans 5 are provided with fin, two cooling fans are opened during normal work, when flowing through fin 6
Cooling liquid proportional increases a cooling fan when reaching 87%, and one is closed when the cooling liquid proportional for flowing through fin 6 is less than 30%
Individual cooling fan.In order to avoid cooling fan continuous operation for a long time, after a cooling fan is continuously run 24 hours, if
Available free cooling fan, PLC can control the cooling fan automatic running of free time, while will continuously run 24 hours
Cooling fan is closed, to increase the service life of cooling fan；When frequency converter 8 is in oepration at full load, it is necessary to cooling device
Heat produced in frequency converter 8 is cooled down with most fast speed, now, PLC control electromagnetic three-ways ratio adjusting valve 2 will
Coolant circulation ratio is adjusted to 100% and flows through fin 6, and now three cooling fans are all run, and flow through fin 6
Coolant is quickly cooled down.
In addition, the output end in PLC is additionally provided with warning device, the temperature detected when second temperature sensor 4
Degree is higher than 5 DEG C of design temperature higher than the temperature that 3 DEG C of design temperature and holding 2 minutes or second temperature sensor 4 are detected, then
Think cooling system failure, warning device is alarmed, prompting staff's inspection cooling system goes bad with the presence or absence of coolant, pipeline
Situations such as blocking.
PLC in the application can also be replaced using other chips such as single-chip microcomputer or DSP, cold in the application in addition
But liquid is cooling water, it is also possible to which oil or other coolants are replaced.
Claims (3)
1. a kind of frequency converter cooling system, including the cold drawing that is arranged in frequency converter box body and it is arranged on following outside frequency converter
Ring pump, cooling fan and fin, are connected between the cold drawing, circulating pump and fin by coolant circulation passage, and it is special
Levy and be：Electric heater is additionally provided with inside the frequency converter, the first temperature is respectively arranged with the import and export of the cold drawing
Sensor and second temperature sensor are spent, the arrival end of the circulating pump connects the port of export of cold drawing, the outlet of the circulating pump
End connects the entrance of electromagnetic three-way ratio adjusting valve, the first of the electromagnetic three-way ratio adjusting valve by coolant circulation passage
Fin outside electric heater in port of export connection frequency converter box body, second outlet end connection frequency converter, the electrical heating
The port of export of the port of export of device and the fin is together connected to the entrance point of cold drawing by coolant circulation passage；Also include
PLC, the input of the Analog input mModule of the PLC connects the first temperature sensor and the second temperature respectively
Spend sensor, the output end control connection electromagnetic three-way ratio adjusting valve and cooling fan of the PLC；
The output end of the PLC connects the line of cooling fan control relay and electromagnetic three-way ratio adjusting valve respectively
Circle, the normally opened contact of the cooling fan control relay is arranged between power supply and cooling fan controlled motor.
2. a kind of frequency converter cooling system as claimed in claim 1, it is characterised in that：The cooling fan has three.
3. a kind of frequency converter cooling system as claimed in claim 2, it is characterised in that：The output end of the PLC is also
It is provided with warning device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410711013.XA CN104377938B (en) | 2014-12-01 | 2014-12-01 | A kind of frequency converter cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410711013.XA CN104377938B (en) | 2014-12-01 | 2014-12-01 | A kind of frequency converter cooling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104377938A CN104377938A (en) | 2015-02-25 |
| CN104377938B true CN104377938B (en) | 2017-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410711013.XA Expired - Fee Related CN104377938B (en) | 2014-12-01 | 2014-12-01 | A kind of frequency converter cooling system |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106686944A (en) * | 2016-12-01 | 2017-05-17 | 无锡市优利康电气有限公司 | Liquid cooling frequency converter heat dissipation system |
Citations (4)
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|---|---|---|---|---|
| CN200975807Y (en) * | 2006-09-29 | 2007-11-14 | 邱致琏 | Frequency converting energy-saving heat pump freezing air-conditioner |
| CN201590751U (en) * | 2009-12-04 | 2010-09-22 | 维斯塔斯风力***有限公司 | Frequency converter cooling system |
| CN102566623A (en) * | 2012-01-04 | 2012-07-11 | 广州高澜节能技术股份有限公司 | Control system of direct current power transmission converter valve pure water cooling device |
| CN103158486A (en) * | 2011-12-19 | 2013-06-19 | 杭州三花研究院有限公司 | Car air-conditioning system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201872596U (en) * | 2010-10-26 | 2011-06-22 | 上海瑞华(集团)有限公司 | Circulation cooling device of battery electric vehicle |
| CN102545546B (en) * | 2011-12-01 | 2014-05-14 | 国家电网公司 | Circulation cooling system and method for controlling same |
| CN103277263B (en) * | 2013-05-17 | 2015-08-26 | 国电联合动力技术(连云港)有限公司 | Cooling system of ultra-large wind generating set |
| CN103760837A (en) * | 2013-11-04 | 2014-04-30 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Cooling tower scale-inhibition testing apparatus control system of direct-current valve cooling system |
| CN104154017B (en) * | 2014-07-29 | 2017-01-25 | 南通理工学院 | Water pump detecting system |
| CN204316304U (en) * | 2014-12-01 | 2015-05-06 | 南阳防爆集团电气***工程有限公司 | A kind of frequency converter cooling system |
-
2014
- 2014-12-01 CN CN201410711013.XA patent/CN104377938B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200975807Y (en) * | 2006-09-29 | 2007-11-14 | 邱致琏 | Frequency converting energy-saving heat pump freezing air-conditioner |
| CN201590751U (en) * | 2009-12-04 | 2010-09-22 | 维斯塔斯风力***有限公司 | Frequency converter cooling system |
| CN103158486A (en) * | 2011-12-19 | 2013-06-19 | 杭州三花研究院有限公司 | Car air-conditioning system |
| CN102566623A (en) * | 2012-01-04 | 2012-07-11 | 广州高澜节能技术股份有限公司 | Control system of direct current power transmission converter valve pure water cooling device |
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| CN104377938A (en) | 2015-02-25 |
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