CN109058144A - The control method and control system of dedusting fan - Google Patents
The control method and control system of dedusting fan Download PDFInfo
- Publication number
- CN109058144A CN109058144A CN201810806238.1A CN201810806238A CN109058144A CN 109058144 A CN109058144 A CN 109058144A CN 201810806238 A CN201810806238 A CN 201810806238A CN 109058144 A CN109058144 A CN 109058144A
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- Prior art keywords
- dedusting fan
- frequency converter
- control
- frequency
- instruction
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
This disclosure relates to the control method and control system of a kind of dedusting fan.The working frequency of frequency converter can be obtained in real time using the control method, that is, know the working condition of dedusting fan in real time; when the working frequency of frequency converter is zero; show that the dedusting fan is in shutdown status, export enabled instruction at this time, to control dedusting fan starting.Therefore, in dedusting fan cancel closedown, the start button on touch-control frequency converter can be needed to can control the drawbacks of dedusting fan is again started up just to avoid user.Furthermore; since the control method is when the working frequency for detecting frequency converter is zero; enabled instruction is exported, control dedusting fan starts, therefore; dedusting fan self-starting in the short time after the cancel closedown can be achieved; guarantee that the dedusting fan restores to work normally in time, and then when excluding the burning gases in kiln using the dedusting fan, kiln furnace inner gas pressure can be reduced in time; the security risk in kiln is eliminated, guarantees the stability produced in kiln.
Description
Technical field
This disclosure relates to glass manufacture manufacture field, and in particular, to a kind of control method of dedusting fan and control system
System.
Background technique
Liquid-crystalline glasses be it is a kind of by liquid crystal film by way of high temperature and pressure, high-tech photoelectric glass made of sandwich package
Product, user can control the arrangement of liquid crystal molecule according to whether the energization of electric current, thus reach control glass transparent with
The final purpose of opaque state.
In the production process of liquid-crystalline glasses, the dust on glass substrate also can generate larger shadow to the transparency of product
It rings, therefore, dust pelletizing system is provided in liquid-crystalline glasses kiln, using the dedusting fan in the dust pelletizing system on glass substrate
Dust be purged.In addition, dedusting fan can also suck burning gases in kiln while removing dust, by burning gases
It is discharged out of kiln, so that pressure needed for kiln furnace inner gas pressure satisfaction production glass.Therefore, dedusting fan is once abnormal stops
Machine, it will cause the burning gases in kiln that cannot be discharged in time, increase kiln furnace pressure, influencing in kiln other equipment just
Often work, can have security risk, wherein voltage fluctuation, instantaneous power failure etc. cause dedusting fan cancel closedown when serious
Principal element.
Summary of the invention
In order to solve the problems, such as present in the relevant technologies, the disclosure provides control method and the control system of a kind of dedusting fan
System.
To achieve the goals above, according to the first aspect of the embodiments of the present disclosure, a kind of controlling party of dedusting fan is provided
Method, comprising:
The working frequency of frequency converter is obtained in real time；
When the working frequency is zero, enabled instruction is exported, wherein the working frequency is zero, shows the dedusting
Blower stops working；
The dedusting fan starting is controlled according to the enabled instruction.
Optionally, the method also includes:
Show the working frequency；
When detecting user's operation, control instruction corresponding with the user's operation is generated；
According to the control instruction, the dedusting fan work is controlled.
Optionally, the host computer includes the button for controlling the frequency converter starting, and the control instruction includes described opens
Dynamic instruction generates control instruction corresponding with the user's operation when detecting user's operation, comprising:
When detecting that user triggers the button, the enabled instruction is generated.
Optionally, the method also includes:
When the working frequency is zero, alarm signal is exported.
According to the second aspect of an embodiment of the present disclosure, a kind of control system of dedusting fan is provided, comprising:
Programmable logic controller (PLC) is connected with frequency converter, for obtaining the working frequency of the frequency converter in real time, and in institute
When to state working frequency be zero, enabled instruction is generated, and the enabled instruction is transmitted to the frequency converter；
The frequency converter, for being connected with the dedusting fan, for receiving the enabled instruction, and according to the starting
Instruction controls the dedusting fan starting；
Wherein, the working frequency is zero, shows that the dedusting fan stops working.
Optionally, the control system further include: host computer,
The host computer is connected with the programmable logic controller (PLC), for showing the working frequency, and is detecting
When to user's operation, signal corresponding with the user's operation is generated, and the signal is sent to the programmable logic control
Device processed；
The programmable logic controller (PLC) is also used to be generated corresponding with the signal according to the signal received
Control instruction, and the control instruction is transmitted to the frequency converter；
The frequency converter is also used to receive the control instruction, and according to the control instruction, controls the dedusting fan
Work.
Optionally, the host computer includes the button for controlling the frequency converter starting, and the signal includes enabling signal,
The host computer, for when detecting that the user triggers the button, generating the enabling signal, and by institute
It states enabling signal and is sent to the programmable logic controller (PLC)；
The programmable logic controller (PLC) is also used to generate the enabled instruction according to the enabling signal.
Optionally, the button is normal open button.
Optionally, the control system further include: alarm,
The programmable logic controller (PLC) is connected with the alarm, for controlling institute when the working frequency is zero
State alarm output alarm signal.
Optionally, the control system further include: relay, the operating mode of the frequency converter include: remote mode and
Local mode,
The relay is respectively connected with the programmable logic controller (PLC) and the frequency converter, is closed in the relay
When conjunction, the operating mode of the frequency converter is the remote mode, and when the relay disconnects, the frequency converter
The operating mode be the local mode.
Using the control method for the dedusting fan that the embodiment of the present disclosure provides, the work frequency of frequency converter can be obtained in real time
Rate, that is, know that the working condition of dedusting fan shows that the dedusting fan is in when the working frequency of frequency converter is zero in real time
Shutdown status exports enabled instruction at this time, to control dedusting fan starting.Therefore, it in dedusting fan cancel closedown, can keep away
Exempting from user needs the start button on touch-control frequency converter just to can control the drawbacks of dedusting fan is again started up.Further, since the control
Method is to export enabled instruction, control dedusting fan starting therefore, can be real when the working frequency for detecting frequency converter is zero
The self-starting in the short time after the cancel closedown of existing dedusting fan, guarantees that the dedusting fan restores to work normally in time.And then
When excluding the burning gases in kiln using the dedusting fan, kiln furnace inner gas pressure can be reduced in time, eliminate the peace in kiln
Full hidden danger guarantees the stability produced in kiln.
Other feature and advantage of the disclosure will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is and to constitute part of specification for providing further understanding of the disclosure, with following tool
Body embodiment is used to explain the disclosure together, but does not constitute the limitation to the disclosure.In the accompanying drawings:
Fig. 1 is a kind of schematic diagram of the control system of dedusting fan shown according to an exemplary embodiment.
Fig. 2 is a kind of another schematic diagram of the control system of dedusting fan shown according to an exemplary embodiment.
Fig. 3 is a kind of flow chart of the control method of dedusting fan shown according to an exemplary embodiment.
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to the disclosure.It should be understood that this place is retouched
The specific embodiment stated is only used for describing and explaining the disclosure, is not limited to the disclosure.
In existing dedusting control system, the work of Frequency Converter Control dedusting fan is mostly used, because of voltage fluctuation, moment
When the factors such as power failure lead to dedusting fan cancel closedown, staff is needed to operate frequency converter closely to control dedusting fan again
Secondary starting.Illustratively, in dedusting fan cancel closedown, the start button of staff's touch-control frequency converter just can control and remove
Dirt blower is again started up.In this scenario, when dedusting fan is shut down, need starting in the manual touch-control frequency converter of staff by
Button is just able to achieve being again started up for dedusting fan, so that the time that control dedusting fan is again started up is longer, is unfavorable for dedusting wind
Machine excludes the burning gases in kiln in time, and kiln furnace inner gas pressure is caused to increase, and influences other equipment in kiln and works normally.
To solve the above-mentioned problems, in dedusting fan cancel closedown, staff is avoided to need opening on touch-control frequency converter
Dynamic button just can control dedusting fan and be again started up, and the embodiment of the present disclosure provides a kind of control method of dedusting fan and control is
System.The working frequency of frequency converter can be obtained in real time using the control method, that is, the working condition of dedusting fan is known in real time,
When the working frequency of frequency converter is zero, shows that the dedusting fan is in shutdown status, export enabled instruction at this time, is removed with control
The starting of dirt blower.Therefore, in dedusting fan cancel closedown, the start button ability on touch-control frequency converter can be needed to avoid user
The drawbacks of control dedusting fan is again started up.Further, since it is zero that the control method, which is in the working frequency for detecting frequency converter,
When, export enabled instruction, control dedusting fan starting, therefore, it can be achieved that dedusting fan after the cancel closedown in the short time from
The purpose of starting guarantees that the dedusting fan restores to work normally in time.And then the combustion in kiln is being excluded using the dedusting fan
When burning gas, kiln furnace inner gas pressure can be reduced in time, eliminates the security risk in kiln, guarantee the stabilization produced in kiln
Property.
Before the control method of dedusting fan of embodiment of the present disclosure offer is discussed in detail, first to the implementation controlling party
The control system of method is illustrated.Referring to FIG. 1, Fig. 1 is a kind of control of dedusting fan shown according to an exemplary embodiment
The schematic diagram of system processed.As shown in Figure 1, the control system may include: programmable logic controller (PLC) (Programmable
Logic Controller；PLC) 1 and frequency converter 2, PLC1 be connected with frequency converter 2, illustratively, PLC1 and frequency converter 2 can lead to
Cross cable network or wireless communication connection.
As it was noted above, mostly using frequency converter 2 in dedusting control system to control dedusting fan 3 and work, therefore, becoming
The working frequency of frequency device 2 can be used to reflect the working condition of dedusting fan, and illustratively, the working frequency of frequency converter 2 is bigger, removes
The revolving speed of dirt blower 3 is bigger, and the speed for excluding burning gases in kiln is faster, when the working frequency of frequency converter 2 is zero, removes
The revolving speed of dirt blower 3 is zero, shows that the dedusting fan 3 is shut down.
Since the working frequency of frequency converter 2 can be used to reflect the working condition of dedusting fan 3, PLC1 can be used
It, can be according to the working frequency after getting the working frequency in the working frequency for obtaining coupled frequency converter 2 in real time
Judge the working condition of dedusting fan 3.Specifically, when the working frequency is zero, determine dedusting fan 3 shut down, at this time in order to
It is again started up dedusting fan 3, PLC1 generates enabled instruction, and the enabled instruction is transmitted to frequency converter 2.Frequency converter 2 be used for
Dedusting fan 3 is connected, for receiving the enabled instruction of PLC1 output, and after receiving the enabled instruction, control and its phase
Dedusting fan 3 even starts.
In addition, it is contemplated that user can be prompted in 3 cancel closedown of dedusting fan, so that user is learning dedusting fan 3
It can be performed after shutdown and correspondingly operate, as shown in Fig. 2, the control system can also include: alarm 4, the alarm 4 and PLC1
It is connected, it, can be with other than generating enabled instruction when the working frequency that accessed frequency converter 2 is determined in PLC1 is zero
The alarm 4 output alarm signal is controlled, to prompt user's 3 cancel closedown of dedusting fan, so that user can execute accordingly
Ground operation (such as: the working condition by controlling combustion apparatus to reduce the burning of kiln fuel, and then is reduced in kiln
Combustion-gas pressure), to avoid due to 3 cancel closedown of dedusting fan to other equipment in kiln (such as: combustion apparatus, conveying
Equipment etc.) it damages.
It should be noted that PLC1 can also give birth to while generating the enabled instruction that control dedusting fan 3 is again started up
At the frequency instruction that is started with a certain revolving speed of control dedusting fan 3, illustratively, PLC1 while generating enabled instruction,
Also frequency instruction is generated, and the frequency instruction and enabled instruction are transmitted in frequency converter 2 simultaneously, so that frequency converter 2 is according to frequency
Rate instructs corresponding frequency values control dedusting fan 3 to work according to the corresponding revolving speed of the frequency values.Wherein, which can
To be the numerical value of user's self-setting, it is also possible to the numerical value of default, is not specifically limited in the disclosure.
The control system for the dedusting fan that the embodiment of the present disclosure provides, comprising: PLC1 and frequency converter 2, wherein PLC1 and change
Frequency device 2 is connected, and PLC1 for obtaining the working frequency of frequency converter 2 in real time, when the working frequency is zero, generates enabled instruction,
And the enabled instruction is transmitted to frequency converter 2, frequency converter 2 controls coupled dedusting wind when receiving the enabled instruction
Machine 3 starts, wherein working frequency zero shows that dedusting fan 3 is shut down.It therefore, can be according to obtaining using above-mentioned control system
The working frequency for the frequency converter 2 got, determines whether dedusting fan 3 shuts down, when working frequency is zero, that is, determines dedusting wind
Machine 3 is shut down, and PLC1 generates enabled instruction, and is transmitted in frequency converter 2, and frequency converter 2 is according to the enabled instruction received, control
Dedusting fan 3 processed starts, may be implemented dedusting fan 3 after the shutdown in the short time self-starting purpose, guarantee the dedusting wind
Machine 3 restores to work normally in time.And then when excluding the burning gases in kiln using the dedusting fan, kiln can be reduced in time
Interior gas pressure eliminates the security risk in kiln, guarantees the stability produced in kiln.
In view of in practical applications, user needs to monitor in real time the working frequency of frequency converter 2, removed in order to know in real time
The working condition of dirt blower 3, as shown in Fig. 2, the control system that the embodiment of the present disclosure provides can also include: host computer 5, on this
Position machine 5 is connected with PLC1, after the working frequency that PLC1 gets frequency converter 2, can further be sent to the working frequency
Position machine 5, host computer 5 shows the working frequency in its display interface, obtains from the display interface of the host computer 5 convenient for user
Know the working condition of dedusting fan 3, user, can be according to the working condition after the working condition for learning the dedusting fan 3
It is operated.
Correspondingly, host computer 5 is also used to when detecting user's operation, generates signal corresponding with the user's operation, and
Send the signal to PLC1.PLC1 is also used to further generate control corresponding with the signal according to the signal received and refer to
It enables, and the control instruction is transmitted to frequency converter 2.Frequency converter 2 is also used to receive the control instruction, and according to the control instruction control
Dedusting fan 3 processed works.
A kind of possible embodiment are as follows: it include the button for controlling frequency converter 2 and starting in host computer 5, it is correspondingly, above-mentioned
Signal includes enabling signal, firstly, host computer 5 for detecting whether user triggers above-mentioned button, is detecting that user's triggering should
When button, enabling signal is generated, then, which is sent to PLC1 by host computer 5, and PLC1 receives the enabling signal
When, enabled instruction corresponding with the enabling signal is generated, and the enabled instruction is transmitted in frequency converter 2, finally, frequency converter 2
Start dedusting fan 3 according to the enabled instruction.Similarly, the button can be arranged in it is virtual in 5 display interface of host computer
Button is also possible to the entity button being arranged in 5 input equipment of host computer, is not especially limited in the embodiments of the present disclosure.
Specifically, user can be with real time inspection host computer 5, the work of frequency converter 2 from the display interface of host computer 5
Whether frequency is zero, when observing the working frequency is zero, triggers the button, host computer 5 can be detected user's triggering should
Button generates enabling signal, and then PLC1 generates enabled instruction, so that frequency converter 2 is controlled dedusting fan 3 according to the enabled instruction and opens
It is dynamic.
Alternatively, as shown in Fig. 2, user receive alarm 4 output alarm signal after (can by audio alert,
Can be alarmed by flashing the light of different colours), the button that triggering control frequency converter 2 starts, host computer 5 can be detected
The button is triggered to user, generates enabling signal, and then PLC1 generates enabled instruction according to the enabling signal, makes 2, frequency converter
Start according to enabled instruction control dedusting fan 3.Using such scheme, the working frequency of frequency converter 2 is monitored in real time without user,
After receiving alarm signal, then being operated in host computer 5 also can control dedusting fan 3 to be again started up.
Preferably, the button that above-mentioned control frequency converter 2 starts can be normal open button, that is, no matter the work of frequency converter 2 frequently
Whether rate is zero, and the button of the control frequency converter 2 starting is always maintained at the state being triggered, and host computer 5 can generate always starting
Signal, and the enabling signal is transmitted in PLC1, it should be noted that when working frequency is not zero, PLC1 is negligible should
Enabling signal, only when working frequency is zero, PLC1 just can generate enabled instruction according to the enabling signal, therefore, in use
Technical solution is stated, triggering the button that control frequency converter 2 starts without user can be realized the self-starting after dedusting fan 3 is shut down,
It is further reduced the workload of user, improves the intelligence of the control system.
Alternatively possible embodiment are as follows: host computer 5 includes that the working frequency of the control frequency converter 2 is changed
Frequency button, correspondingly, above-mentioned signal include frequency signal, firstly, host computer 5 is for detecting whether user triggers said frequencies
Button generates frequency signal, then, which is sent to by host computer 5 when detecting that user triggers the frequency button
When PLC1, PLC1 receive the frequency signal, frequency instruction corresponding with the frequency signal is generated, and the frequency instruction is transmitted
Into frequency converter 2, finally, frequency converter 2 changes its working frequency according to the frequency instruction, and then the work of dedusting fan 3 is adjusted
State, that is, the revolving speed of dedusting fan 3.
It should be noted that in the embodiments of the present disclosure, said frequencies button can characterize 2 one fixed frequencies of frequency converter
Numerical value (for example, button of characterization 30Hz), the increase or reduction that can also characterize the working frequency of frequency converter 2 are (for example, indicate
The button of "+" or "-"), and the frequency button can be the virtual push button being arranged in 5 display interface of host computer, be also possible to
Entity button in 5 input equipment of host computer is set, is not especially limited in the embodiments of the present disclosure.
Using the technical solution, frequency button can be set in host computer 5 in advance, obtained in host computer 5 convenient for user
After knowing the working condition (that is, working frequency of frequency converter 2) of dedusting fan 3, inputted correspondingly in the host computer 5 in time
Operation changes the working frequency of frequency converter 2, more meets the purpose of 3 working condition of user monitoring dedusting fan.
Another possible embodiment are as follows: host computer 5 includes controlling the button and control institute that the frequency converter 2 starts
The changed frequency button of working frequency of frequency converter 2 is stated, specific embodiment is as it was noted above, details are not described herein again.
It should be noted that the host computer 5 can be arranged in the same region with dedusting fan 3, also can be set
In different regions.Preferably, host computer 5 is arranged in different regions from dedusting fan 3, such as: the setting of host computer 5 is being supervised
Control is indoor, and dedusting fan 3 is arranged at kiln mouth, and user is not necessarily to only can need to remotely monitor this in monitoring room close to kiln
The working condition of dedusting fan 3 improves the experience of 3 working condition of user monitoring dedusting fan.
In addition, it is contemplated that the user being located at kiln mouth is possible to directly to operate frequency converter 2, to control dedusting
The working condition of blower 3, as shown in Fig. 2, the control system can also include: relay 6, correspondingly, the Working mould of frequency converter 2
Formula includes: remote mode and local mode.
Wherein, relay 6 and PLC1 and frequency converter 2 are respectively connected with, when relay 6 is closed, the Working mould of the frequency converter 2
Formula is remote mode, its working frequency can be sent to PLC1 by frequency converter 2, and, receive the control instruction of PLC1 transmission, control
Dedusting fan 3 processed works.When relay 6 disconnects, the operating mode of frequency converter 2 is local mode, the use at kiln mouth
Family can directly operate frequency converter 2, to control the working condition of dedusting fan 3.Therefore, using above-mentioned control system,
The working frequency that user remotely controls frequency converter 2 can be thus achieved, also can satisfy user and directly controlled when being located at kiln mouth
The demand of the working frequency of frequency converter 2 processed.
Referring to FIG. 3, Fig. 3 is a kind of process of the control method of dedusting fan shown according to an exemplary embodiment
Figure.As shown in figure 3, the control method the following steps are included:
Step S31: the working frequency of frequency converter is obtained in real time；
Step S32: when working frequency is zero, enabled instruction is exported, wherein working frequency zero shows dedusting fan
It stops working；
Step S33: dedusting fan starting is controlled according to enabled instruction.
Optionally, the method also includes:
Show the working frequency；
When detecting user's operation, control instruction corresponding with the user's operation is generated；
According to the control instruction, the dedusting fan work is controlled.
Optionally, the host computer includes the button for controlling the frequency converter starting, and the control instruction includes described opens
Dynamic instruction generates control instruction corresponding with the user's operation when detecting user's operation, comprising:
When detecting that user triggers the button, the enabled instruction is generated.
Optionally, the method also includes:
When the working frequency is zero, alarm signal is exported.
About the control method in above-described embodiment, wherein the concrete mode that each step is implemented is in the related control
It is described in detail in the embodiment of system, no detailed explanation will be given here.
The preferred embodiment of the disclosure is described in detail in conjunction with attached drawing above, still, the disclosure is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out to the technical solution of the disclosure
Monotropic type, these simple variants belong to the protection scope of the disclosure.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the disclosure to it is various can
No further explanation will be given for the combination of energy.
In addition, any combination can also be carried out between a variety of different embodiments of the disclosure, as long as it is without prejudice to originally
Disclosed thought equally should be considered as disclosure disclosure of that.
Claims (10)
1. a kind of control method of dedusting fan characterized by comprising
The working frequency of frequency converter is obtained in real time；
When the working frequency is zero, enabled instruction is exported, wherein the working frequency is zero, shows the dedusting fan
It stops working；
The dedusting fan starting is controlled according to the enabled instruction.
2. control method according to claim 1, which is characterized in that the method also includes:
Show the working frequency；
When detecting user's operation, control instruction corresponding with the user's operation is generated；
According to the control instruction, the dedusting fan work is controlled.
3. control method according to claim 2, which is characterized in that the host computer includes controlling the frequency converter starting
Button, the control instruction includes the enabled instruction,
It is described when detecting user's operation, generate corresponding with user's operation control instruction, comprising:
When detecting that user triggers the button, the enabled instruction is generated.
4. control method according to claim 1, which is characterized in that the method also includes:
When the working frequency is zero, alarm signal is exported.
5. a kind of control system of dedusting fan characterized by comprising
Programmable logic controller (PLC) is connected with frequency converter, for obtaining the working frequency of the frequency converter in real time, and in the work
When working frequency is zero, enabled instruction is generated, and the enabled instruction is transmitted to the frequency converter；
The frequency converter receives the enabled instruction, and according to the enabled instruction, control for being connected with the dedusting fan
Make the dedusting fan starting；
Wherein, the working frequency is zero, shows that the dedusting fan stops working.
6. control system according to claim 5, which is characterized in that the control system further include: host computer,
The host computer is connected with the programmable logic controller (PLC), for showing the working frequency, and is detecting use
When family operates, signal corresponding with the user's operation is generated, and the signal is sent to the programmable logic controller (PLC)；
The programmable logic controller (PLC) is also used to generate control corresponding with the signal according to the signal received
Instruction, and the control instruction is transmitted to the frequency converter；
The frequency converter is also used to receive the control instruction, and according to the control instruction, controls the dedusting fan work
Make.
7. control system according to claim 6, which is characterized in that the host computer includes controlling the frequency converter starting
Button, the signal includes enabling signal,
The host computer, for generating the enabling signal, and open described when detecting that the user triggers the button
Dynamic signal is sent to the programmable logic controller (PLC)；
The programmable logic controller (PLC) is also used to generate the enabled instruction according to the enabling signal.
8. control system according to claim 7, which is characterized in that the button is normal open button.
9. control system according to claim 5, which is characterized in that the control system further include: alarm,
The programmable logic controller (PLC) is connected with the alarm, for controlling the report when the working frequency is zero
Alert device exports alarm signal.
10. control system according to claim 5, which is characterized in that the control system further include: relay, it is described
The operating mode of frequency converter includes: remote mode and local mode,
The relay is respectively connected with the programmable logic controller (PLC) and the frequency converter, in relay closure,
The operating mode of the frequency converter is the remote mode, and when the relay disconnects, the institute of the frequency converter
Stating operating mode is the local mode.
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| CN201810806238.1A CN109058144A (en) | 2018-07-20 | 2018-07-20 | The control method and control system of dedusting fan |
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| CN201810806238.1A CN109058144A (en) | 2018-07-20 | 2018-07-20 | The control method and control system of dedusting fan |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113448295A (en) * | 2021-05-14 | 2021-09-28 | 郑州旭飞光电科技有限公司 | Method for switching induced draft fan, processor and storage medium |
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| CN104343713A (en) * | 2014-01-20 | 2015-02-11 | 上海新时达电气股份有限公司 | Failure detection circuit of alternating current fan |
| CN203892221U (en) * | 2014-04-16 | 2014-10-22 | 吴忠市世名电气有限公司 | Intelligent control device of dust removing fan of fully-enclosed smelting electric furnace |
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Application publication date: 20181221 |