CN207674689U - A kind of Intelligent constant-voltage air blowing control device device - Google Patents
A kind of Intelligent constant-voltage air blowing control device device Download PDFInfo
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- CN207674689U CN207674689U CN201721721201.6U CN201721721201U CN207674689U CN 207674689 U CN207674689 U CN 207674689U CN 201721721201 U CN201721721201 U CN 201721721201U CN 207674689 U CN207674689 U CN 207674689U
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- air
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- control device
- air blowing
- blowing control
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The utility model is related to vent cabinet control device technical fields, more particularly to a kind of Intelligent constant-voltage air blowing control device device, including constant pressure supply air system, the constant pressure supply air system includes air blowing control device, remote pressure gauge, blast switch, powered air-purifying device, frequency converter, PAU+FCU system circuit, several Fans and several air-supply rooms；The remote pressure gauge and blast switch are connect with air blowing control device, and the air blowing control device is connect with frequency converter, and the frequency converter is connect with PAU+FCU system circuit, and the blast switch is connect with powered air-purifying device, and the powered air-purifying device is connect with several Fans；The utility model, which solves installation, debugs integrated, a preparation and a use automatically switches, and wind turbine belongs to that mechanical motion is easy to wear, and alternation can increase service life；Becoming constant pressure air-supply in the way of frequency conversion simultaneously makes air-supply stablize, and runs consumption reduction effect also more significantly than power frequency full load, in the case of current national energy anxiety, has great importance.
Description
Technical field
The present invention relates to vent cabinet control device technical field more particularly to a kind of Intelligent constant-voltage air blowing control device devices.
Background technology
With continuing to bring out for economic fast development and urban architecture, people are to Laboratory air ventilation quality and air-supply
The requirement of system reliability is continuously improved, plus current energy shortages to energy-efficient requirement, therefore the advanced electronic measurement and control of utilization
Technology and automated control technology design high-performance, high reliability, low cost, low energy consumption and can be applicable in different experiments environment
Constant pressure supply air system also just at inexorable trend.
With the made rapid progress of variable-frequency control technique in recent years, frequency-changing pressure stabilizing air-supply also slowly develops on its basis
Come, and as a kind of emerging modernization air-supply technology.
Currently, most constant pressure supply air system engineering design all uses one pressure fan of a frequency converter band in the market
The mode of group.It is fewer with a frequency converter dragging multiple fan operation the case where, not only cost of investment is larger for this mode, and
It has a single function.
Invention content
The purpose of the present invention is to solve disadvantages existing in the prior art, and a kind of solution installation, the debugging proposed
Integrated, a preparation and a use automatically switches, and becomes the Intelligent constant-voltage air-supply that constant pressure air-supply makes air-supply stablize in the way of frequency conversion
Control device.
To achieve the goals above, present invention employs following technical solutions：A kind of Intelligent constant-voltage air blowing control device device,
Including constant pressure supply air system, the constant pressure supply air system includes air blowing control device, remote pressure gauge, blast switch, powered air-purifying
Device, frequency converter, PAU+FCU system circuit, several Fans and several air-supply rooms；The remote pressure gauge and blast switch are equal
It is connect with air blowing control device, the air blowing control device is connect with frequency converter, and the frequency converter is connect with PAU+FCU system circuit, described
Blast switch is connect with powered air-purifying device, and the powered air-purifying device is connect with several Fans, if the PAU+FCU system circuit with
Dry Fans connection, several Fans are connect with several air-supply rooms, several described air-supply rooms and remote pressure
Table connects.
Preferably, the air blowing control device includes master controller, POWER power circuits, pressure gauge signal sample circuit, opens
Pass amount isolation input circuit, touch screen, DA output conversion circuits, Frequency Converter Control output circuit, is opened EEPROM storage circuits
It measures without source follower circuit, motor control group and real-time hour hands circuit pass；The POWER power circuits and real-time hour hands circuit with
Master controller connects, and the remote pressure gauge connect by pressure gauge signal sample circuit with master controller, the switching value every
It is connect with master controller from input circuit, the master controller is connected with each other with EEPROM storage circuits and touch screen respectively, institute
Master controller is stated to connect with Frequency Converter Control output circuit by DA output conversion circuits, the master controller by switching value without
Source follower circuit is connect with motor control group.
Preferably, the wind turbine is two.
Preferably, the remote pressure gauge is located at user's pipe network end.
Preferably, the master controller uses C8051F410 microcontrollers.
Preferably, the POWER power circuits are electric using the high-precision switching power supply of TOP221Y three-terminal regulator chips
Road.
Preferably, the pressure gauge signal sample circuit and switching value isolation input circuit are set to each air-supply room
It is interior.
Preferably, the EEPROM storage circuits use AT24C02 integrated chips.
The invention has the advantages that：A kind of Intelligent constant-voltage air blowing control device device of the present invention, including perseverance
Force feed wind system, the constant pressure supply air system include air blowing control device, remote pressure gauge, blast switch, powered air-purifying device, frequency conversion
Device, PAU+FCU system circuit, several Fans and several air-supply rooms；The remote pressure gauge and blast switch are controlled with air-supply
Device connection processed, the air blowing control device are connect with frequency converter, and the frequency converter is connect with PAU+FCU system circuit, the blast switch
It is connect with powered air-purifying device, the powered air-purifying device is connect with several Fans, the PAU+FCU system circuit and several Fans
Connection, several Fans are connect with several air-supply rooms, several described air-supply rooms are connect with remote pressure gauge；This
Invention using the above structure, solves installation, debugs integrated, a preparation and a use automatic switchover, wind turbine belongs to mechanical motion and easily grinds
Damage, alternation can increase service life；Becoming constant pressure air-supply in the way of frequency conversion simultaneously makes air-supply stablize, fuller than power frequency
Load running consumption reduction effect also more significantly, in the case of current national energy anxiety, has great importance.
Description of the drawings
Fig. 1 is the block diagram of the present invention.
Fig. 2 is the block diagram of air blowing control device in the present invention.
Fig. 3 is the circuit diagram of pressure gauge signal sample circuit and switching value isolation input electricity in the present invention.
Fig. 4 is the circuit diagram of DA output conversion circuits in the present invention.
Fig. 5 is the Increment Type Digital Hydraulic pid algorithm control flow chart of air blowing control device in the present invention.
In figure：1 air blowing control device, 2 remote pressure gauges, 3 blast switch, 4 powered air-purifying devices, 5 frequency converters, 6 PAU+FCU systems
Circuit, 7 several Fans, 8 several air-supply rooms, 9 master controllers, 10POWER power circuits, 11 pressure gauge signal sampling electricity
Road, 12 switching value isolation input circuits, 13EEPROM storage circuits, 14 touch screens, 15DA output conversion circuits, 16 frequency converters
Control output circuit, 17 switching values are without source follower circuit, 18 motor control groups, 19 real-time hour hands circuits.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
- Fig. 5 referring to Fig.1, a kind of Intelligent constant-voltage air blowing control device device, including constant pressure supply air system, the constant pressure air-supply
System include air blowing control device 1, remote pressure gauge 2, blast switch 3, powered air-purifying device 4, frequency converter 5, PAU+FCU system circuit 6,
Several Fans 7 and several air-supply rooms 8；The remote pressure gauge 2 and blast switch 3 are connect with air blowing control device 1, institute
It states air blowing control device 1 to connect with frequency converter 5, the frequency converter 5 is connect with PAU+FCU system circuit 6, the blast switch 3 and air-supply
Filter 4 connects, and the powered air-purifying device 4 is connect with several Fans 7, the PAU+FCU system circuit 6 and several Fans 7
Connection, several Fans 7 are connect with several air-supply rooms 8, several described air-supply rooms 8 connect with remote pressure gauge 2
It connects.Wherein, in the present embodiment, the wind turbine 7 is two, and the remote pressure gauge 2 is located at user's pipe network end.
In the constant pressure supply air system, be installed on pipe network distance-transmission pressure gauge provide air hose pressure signal, and by photoelectricity every
From and voltage conversion circuit, send the master controller of system to, controller is by collected pressure data and preset pressure ratio
Compared with obtaining deviation, show that control parameter is converted to analog voltage by control parameter, D/A modules using after PID operations
Output, adjusts the output frequency of frequency converter, to control rotation speed of fan, to ensure that pipe network pressure does substantially constant.When demand is blown
When amount increases, ductwork pressure is less than preset value, and frequency converter frequency will increase, and rotation speed of fan is accelerated, thus riser tubing pressure,
If but reach wind turbine rated output power and still cannot be satisfied user's air-supply when requiring, which is automatically converted into power frequency operation dress
State, and the lower Fans of variable frequency starting；Conversely, when air output is reduced, then fan operation frequency is reduced until the lower limit of setting is transported
Line frequency, if air output reduces frequency until minimum, by certain delay, controller is again still greater than demand air quantity
Compare pressure, and calculate control output, to maintain constant pressure to blow.Meanwhile in the present embodiment, this can control 2 simultaneously
Different operational modes may be used according to different occasions for wind turbine, and such as single fan operation, one are become, periodically with a benefit, a work one
Ventilating fan etc..
Specifically, the air blowing control device 1 includes master controller 9, POWER power circuits 10, pressure gauge signal sampling electricity
Road 11, switching value isolation input circuit 12, EEPROM storage circuits 13, touch screen 14, DA output conversion circuits 15, frequency converter
Control output circuit 16, switching value are without source follower circuit 17, motor control group 18 and real-time hour hands circuit 19；The POWER electricity
Source circuit 10 and real-time hour hands circuit 19 are connect with master controller 9, and the remote pressure gauge 2 passes through pressure gauge signal sampling electricity
Road 11 is connect with master controller 9, and the switching value isolation input circuit 12 is connect with master controller 9, and the master controller 9 is distinguished
It is connected with each other with EEPROM storage circuits 13 and touch screen 14, the master controller 9 passes through DA output conversion circuits 15 and frequency conversion
Device control output circuit 16 connects, and the master controller 9 is connect without source follower circuit 17 with motor control group 18 by switching value.
In the present embodiment, the hardware and software of above-mentioned air blowing control device 1 is using modularization, standardized designs.Controller
Mainly it is made of mainboard, touch screen and power supply three parts.Principle is：It is run by touch screen setting preset pressure and controller
Parameters are saved in EEPROM to do power down storage, are located at the voltage or all electric that the distance-transmission pressure gauge at user's pipe network end exports
The stream sampled circuit of signal is defeated to turn to digital quantity, is sent into MCU compared with preset pressure, calculates and exports simulation controlled quentity controlled variable and power-off
Device output state amount.Wherein, the output of simulation controlled quentity controlled variable gives frequency converter by frequency transformer control module circuit, to control frequency conversion
The output frequency of device；Relay output state amount gives relay group by outputting circuit for relay, to control each wind turbine
Work in power frequency or frequency conversion state.Last MCU is actual pressure value, the work of preset pressure value, output frequency and each wind turbine
It is sent to display panel as state, so that user is observed and operates.
Specifically, the master controller 9 uses C8051F410 microcontrollers, it is a fully-integrated mixed signal piece
Upper system cake core, is internally integrated 12Bit high-speed ADCs and current-output type DAC module, at the same hard-wired SMBus and
UART serial line interfaces, can convenient processor communicated with EEPROM and serial mode pass-out, it also support JTAG real-time simulations and with
Track is not take up resource in piece and facilitates User Exploitation program at full speed in system debug.
Specifically, high-precision switching power supply of the POWER power circuits 10 using TOP221Y three-terminal regulator chips
Circuit, main circuit topological structure select single-ended flyback DC transfer circuit, output to use two groups of DC low voltage power supplies, lead back
Road provides 5V DC power supplies for the number electricity part of system, and subloop provides 15V DC power supplies for the analog portion of system.
Specifically, the pressure gauge signal sample circuit 11 and switching value isolation input circuit 12 are set to each air-supply
In room 8, by blast pressure Sensor monitoring to pressure signal by photoelectric isolating circuit be filtered with after isolation processing,
Into the ADC module of MUC, ratio conversion is realized, transformation result is the digital quantity of 12Bit, so that MCU handles its signal
And calculating.In order to ensure input quantity with conversion range match, give full play to the resolution of A/D converter, to pressure signal into
When passing through photoelectric isolating circuit before row A/D conversions, the incoming 0-5V analog voltages in outside are just converted into 0-2V simulation electricity
Pressure.
With reference to Fig. 3, external voltage signal is accessed from the ports IN, by isolation and filter circuit, is converted to 0-2V voltages, from
MCU is sent into the ports ADC, while during collection of simulant signal is to MCU systems, and various interference signals all can be with tested
Amount signal enters MCU control systems, these signal superpositions can reduce the accuracy of measurement in useful measured signal, cause to control
System processed it is unstable.The above circuit design just carries out the mutual conversion between photoelectricity using linear optical coupling, uses light as matchmaker
Be situated between carry out signal transmission, electrically make measuring system completely isolated with on-site signal, to realize level linear transformation and
The electrical noise interference at scene is not introduced into control system.
Specifically, Frequency Converter Control output circuit 16MCU will be counted by internal current-output type D A switch module
The digital quantity obtained is converted into analog voltage output, is used for controlling change after output voltage is filtered and ratio conversion process
The frequency of frequency device.Simultaneously in order to ensure that the DAC output voltage of MCU is reliable and stable, without interruption, external circuit equally uses
Photoelectricity is every circuit.
Specifically, AT24C02 integrated chip of the EEPROM storage circuits 13 using atmel corp, small, performance
It is excellent, it is flexible and convenient to use, it can be in the storage data of system power failure, to read after restarting machine.Processor itself collects
IIC interfaces are compatible at SMBus, can directly be communicated with AT24C02, this conceptual design is simple, and reliable operation is of low cost.
Specifically, switching value is without source follower circuit 17, circuit mainly by 74HC574 latch in order to avoid state is disturbed,
Then through Phototube Coupling output driving relay, to control working condition and the action of blower motor.
Operational process
Pid control algorithm is adopted to the adjusting of frequency converter output frequency in the controller, control algolithm is exactly to deviation
Than row, integral and differential.It is technology maturation in continuous system, most widely used a kind of algorithm, especially in Industry Control
In, because the mathematical models of control object are established very much, systematic parameter changes frequent occurrence again, therefore uses PID control.
It is Data Discretization mathematic(al) representation in a computer：
Wherein：KP, KI and KD are respectively proportionality coefficient, integral coefficient and differential coefficient；E (t) is error.
It can easily be realized with computer after discretization in formula, the mathematic(al) representation of Position Form PID control law
For：
E (j) is the error amount of jth time sampling in formula；T is the sampling period.
In practical applications, it is typically chosen incremental timestamp rule.Because increasing type algorithm is compared with position type algorithm,
The former need not do cumulative, be not likely to produce big add up error, and obtain be controlled quentity controlled variable increment, the influence ratio of malfunction
It is smaller, it is easier to realize that Increment Type Digital Hydraulic PID control formula is manually to automatically switching without impact：
With reference to Fig. 5, in the controller, executing agency uses frequency converter and wind turbine, due to being controlled using Increment Type Digital Hydraulic PID
Algorithm processed, so for each sampling period, the controlled quentity controlled variable of controller output is all for the incrementss of last time.The figure is increment type
The control flow of Digital PID Algorithm in the entire system enters AD timing acquirings and interrupts every time, and pressure signal will be converted into
The digital quantity of pressure signal is just obtained corresponding control output digital quantity by algorithm process, connect by digital quantity, pid control module
It startup DA and digital quantity is converted into analog voltage output, to control frequency converter, a little modules match make and break for analog voltage output
Electric switch output module and pressure acquisition module realize measurement in real time and control by controlling accordingly, keep blast pressure
Dynamic equilibrium.In order to facilitate field adjustable, make PID adjustment up and down and the setting value in tracking sampling period can in the design
Become, it can be in booting by touch screen change value, to change pid parameter, to adapt to the control needs of different occasions.
In conclusion the Intelligent constant-voltage air blowing control device device, controlled by the way that PID is added far or indistinct system response performance have compared with
Big raising, controller sampling and control accuracy, and there are many protection and anti-interference function, ensure that the stability of controller
And safety.Using constant pressure supply air system, air output Quality advance, such as air draft suddenly change, air output is set to change therewith, room
In without apparent abrupt changing air pressuer sense.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of Intelligent constant-voltage air blowing control device device, including constant pressure supply air system, which is characterized in that the constant pressure supply air system
Including air blowing control device（1）, remote pressure gauge（2）, blast switch（3）, powered air-purifying device（4）, frequency converter（5）, PAU+FCU system
Circuit（6）, several Fans（7）With several air-supply rooms（8）；The remote pressure gauge（2）And blast switch（3）With give
Wind controller（1）Connection, the air blowing control device（1）With frequency converter（5）Connection, the frequency converter（5）With PAU+FCU system circuit
（6）Connection, the blast switch（3）With powered air-purifying device（4）Connection, the powered air-purifying device（4）With several Fans（7）Even
It connects, the PAU+FCU system circuit（6）With several Fans（7）Connection, several Fans（7）With several air-supply rooms
（8）Connection, several described air-supply rooms（8）With remote pressure gauge（2）Connection.
2. a kind of Intelligent constant-voltage air blowing control device device according to claim 1, which is characterized in that the air blowing control device
（1）Including master controller（9）, POWER power circuits（10）, pressure gauge signal sample circuit（11）, switching value isolation input electricity
Road（12）, EEPROM storage circuits（13）, touch screen（14）, DA output conversion circuits（15）, Frequency Converter Control output circuit
（16）, switching value is without source follower circuit（17）, motor control group（18）With real-time hour hands circuit（19）；The POWER power supplys electricity
Road（10）With real-time hour hands circuit（19）And master controller（9）Connection, the remote pressure gauge（2）It is adopted by pressure gauge signal
Sample circuit（11）With master controller（9）Connection, the switching value isolation input circuit（12）With master controller（9）Connection, it is described
Master controller（9）Respectively with EEPROM storage circuits（13）And touch screen（14）It is connected with each other, the master controller（9）Pass through DA
Output conversion circuit（15）With Frequency Converter Control output circuit（16）Connection, the master controller（9）It is passive defeated by switching value
Go out circuit（17）With motor control group（18）Connection.
3. a kind of Intelligent constant-voltage air blowing control device device according to claim 1, which is characterized in that the wind turbine（7）For
Two.
4. a kind of Intelligent constant-voltage air blowing control device device according to claim 1, which is characterized in that the remote pressure gauge
（2）Positioned at user's pipe network end.
5. a kind of Intelligent constant-voltage air blowing control device device according to claim 2, which is characterized in that the master controller
（9）Using C8051F410 microcontrollers.
6. a kind of Intelligent constant-voltage air blowing control device device according to claim 2, which is characterized in that the POWER power supplys
Circuit（10）Using the high-precision Type of Switch Stabilivolt Source Circuit of TOP221Y three-terminal regulator chips.
7. a kind of Intelligent constant-voltage air blowing control device device according to claim 2, which is characterized in that the pressure gauge signal
Sample circuit（11）With switching value isolation input circuit（12）It is set to each air-supply room（8）It is interior.
8. a kind of Intelligent constant-voltage air blowing control device device according to claim 2, which is characterized in that the EEPROM storages
Circuit（13）Using AT24C02 integrated chips.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721721201.6U CN207674689U (en) | 2017-12-12 | 2017-12-12 | A kind of Intelligent constant-voltage air blowing control device device |
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| CN201721721201.6U CN207674689U (en) | 2017-12-12 | 2017-12-12 | A kind of Intelligent constant-voltage air blowing control device device |
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| CN207674689U true CN207674689U (en) | 2018-07-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108006921A (en) * | 2017-12-12 | 2018-05-08 | 湖南普信工程技术有限公司 | A kind of Intelligent constant-voltage air blowing control device device |
-
2017
- 2017-12-12 CN CN201721721201.6U patent/CN207674689U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108006921A (en) * | 2017-12-12 | 2018-05-08 | 湖南普信工程技术有限公司 | A kind of Intelligent constant-voltage air blowing control device device |
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