CN207907447U - A kind of air draft constant pressure frequency conversion control device - Google Patents
A kind of air draft constant pressure frequency conversion control device Download PDFInfo
- Publication number
- CN207907447U CN207907447U CN201721723485.2U CN201721723485U CN207907447U CN 207907447 U CN207907447 U CN 207907447U CN 201721723485 U CN201721723485 U CN 201721723485U CN 207907447 U CN207907447 U CN 207907447U
- Authority
- CN
- China
- Prior art keywords
- frequency conversion
- constant pressure
- pressure frequency
- control device
- air draft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Landscapes
- Ventilation (AREA)
Abstract
The utility model is related to vent cabinet discharge control device technical fields, more particularly to a kind of air draft constant pressure frequency conversion control device, controller including exhaust system and for controlling the exhaust system, the controller include constant pressure frequency conversion controller, POWER power circuits, pressure control monitor, several vent cabinet air quantity modules, transducer control circuit, fan radiating circuit and other spare modules；The POWER power circuits are electrically connected with constant pressure frequency conversion controller, and the pressure control monitor and several vent cabinet air quantity modules are electrically connected with the constant pressure frequency conversion controller；Vent cabinet in the device uses frequency control strategy; it on the one hand can be energy saving; on the other hand no matter a system opens how many vent cabinets; the air quantity of its single vent cabinet can keep substantially constant; ensure the quality of chemical experiment; it avoids the variation of wind speed from impacting experiment, overcomes the disadvantage that ventilation effect is poor, noise is big in the design of traditional chemical laboratory building.
Description
Technical field
The present invention relates to vent cabinet discharge control device technical fields more particularly to a kind of air draft constant pressure frequency conversion controller to fill
It sets.
Background technology
Currently, carry out chemical experiment in Chemical Experiment Building, often will produce various unpleasant, mordant has poison gas
Body.These pernicious gases not only pollute Laboratory Air, influence the health and peace of experimenter as drained into outdoor not in time
Entirely, but also precision and the service life of equipment can be influenced.
Chemical Experiment Building Design of ventilation how is carried out, various pernicious gases and waste heat are effectively eliminated, to improving teaching and section
Condition is ground, ensures that teachers and students, the physical and mental health of researcher are particularly important.In order to ensure the exhaust effect in each laboratory, wind is removed
Machine, air hose material type selecting are reasonable, except with air-supply, outside air draft air volumematching, system is considered in Design of Electrical Controling System
The functions such as safe and stable, low consumption, easy to operate.
Conventional method defect, can produce a large amount of toxic and harmful gas in production or experimentation, these are required for air draft
System is into air draft.Exhaust blower is generally located on roof, 1 Fans by manifold and the multiple vent cabinets of branch pipe band or exhaust hood,
Keep the exhaust air rate of whole system very big, with the front face area of 1.5M * 0.7M, the face wind speed of 0.5M/S calculates, a Fans band
For 10 vent cabinets, then the air quantity of wind turbine is up to 4000M3/H or more.It is used when all different in view of vent cabinet one is removed, and
In a system, if only using a vent cabinet, roof ventilator runs on rated speed, then will appear " low load with strong power "
Phenomenon, not only waste of energy, and noise, very greatly, air hose bear prodigious pressure, if air hose is of poor quality, can also keep watch
Pipe is inhaled bad.
Since the purposes of vent cabinet is increasingly extensive, but its electricity consumed occupies sizable ratio in chemical laboratory
Example, current vent cabinet design mostly using air quantity series is determined, are adjusted by air-valve, cause energy significant wastage.Traditional
Using air quantity and segmentation frequency control is determined, determine air quantity segmentation frequency conversion is exactly control mode：Than if any 10 vent cabinets, opening one just
It is an air quantity, it is exactly two air quantity ... to open two.It is corresponding to it with ten sections of air quantity are set at frequency-variable controller end.This method ratio
Tradition determine that air quantity is in line to improve significantly, but often vent cabinet is different at a distance from fan end, and the pressure of appearance is different.Also
There is exactly every vent cabinet to have two state of on and off, then ten combinations for just having arbitrary two or two or more, so institute
Having combination to take into account just has 2 10 power kinds possible, 1024 kinds of combinations.If there is 12, just there is 2 4096 kinds of 12 power can
Can, it can think and it, to accomplish to accurately control steady air draft, just debugging is all very big workload.So in the field often all
It is to debug roughly, fixed several segmentations.
Invention content
The purpose of the present invention is to solve disadvantages existing in the prior art, and the one kind proposed is real for chemistry at present
Test in building ventilating system frequently with constant air volume system design it cannot be guaranteed that vent cabinet air quantity stabilization, exhaust effect is poor, noise
It greatly, cannot energy saving problem to the maximum extent, it is proposed that according to the quantity for the vent cabinet that system is opened, using based on microcontroller
With the air draft constant pressure frequency conversion control device of the VAV control method of frequency converter.
To achieve the goals above, present invention employs following technical solutions：A kind of air draft constant pressure frequency conversion control device,
Controller including exhaust system and for controlling the exhaust system, the controller include constant pressure frequency conversion controller,
POWER power circuits, pressure control monitor, several vent cabinet air quantity modules, transducer control circuit, fan radiating circuits
With other spare modules；The POWER power circuits and constant pressure frequency conversion controller are electrically connected, the pressure control monitor and
Several vent cabinet air quantity modules with the constant pressure frequency conversion controller be electrically connected, the constant pressure frequency conversion controller respectively with institute
Transducer control circuit, fan radiating circuit and other spare modules are stated to be electrically connected.
Preferably, the exhaust system include exhaust duct, the exhaust blower that is connect with the exhaust duct, the exhaust duct
Road is equipped with the pressure control monitor, and the pressure control monitor is connect with pressure frequency changer circuit.
Preferably, the junction of the exhaust duct and exhaust blower is equipped with air cleaning unit.
Preferably, the pressure control monitor is static pressure transducer.
Preferably, the exhaust blower is centrifugation exhaust blower.
Preferably, the constant pressure frequency conversion controller includes MCU circuit modules, hour hands circuit module, reset circuit module, leads to
Interrogate circuit module, adc circuit module and DAC circuit module.
Preferably, the MCU circuit modules use ATMEGA128A microcontrollers.
Preferably, the communication circuit module uses RS-485 chips.
Preferably, the adc circuit module uses TLC2543 chips, the DAC circuit module to use DAC7512 chips.
The invention has the advantages that：A kind of air draft constant pressure frequency conversion control device of the present invention, in air draft
Increase static pressure transducer in system, detects the static pressure in pipeline；Flow parameter, exhaust hood are picked up by passing vent cabinet end
Flow parameter is directly read using the mode of flow controller, can be calculated by frequency-variable controller in flow parameter to controller
Go out corresponding pressure, then the practical pressure comparison measured of root, carry out PID arithmetic, increases and decreases frequency, and keep stable.Meanwhile it should
Device measures stream in the way of constant pressure frequency conversion, and with the demand automatic frequency-conversion adjusting according to pressure, commissioning staff only need to be according to root pressure
One value of setting can be run, if as soon as only vent cabinet uses, then only needing small flow that can generate prodigious static pressure, control
Device processed can control frequency conversion, otherwise similarly.In addition, the device is designed for the buildings actual items Shi Xian ventilated control system in engineering,
The result shows that blast-variable main fan control technology is feasible, there is energy-efficient effect.
Description of the drawings
Fig. 1 is the block diagram of the present invention.
Fig. 2 is the air draft schematic diagram of the present invention.
Fig. 3 is logic figure in air draft unit for electromechanical cabinet in the present invention.
In figure：1 constant pressure frequency conversion controller, 2POWER power circuits, 3 pressure control monitors, 4 several vent cabinet air quantity
Module, 5 transducer control circuits, 6 fan radiating circuits, 7 other spare modules, 8 exhaust ducts, 9 exhaust blowers, 10 pressure frequency conversions
Circuit, 11 air cleaning units.
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. 3 referring to Fig.1, a kind of air draft constant pressure frequency conversion control device, including exhaust system and described for controlling
The controller of exhaust system, the controller include constant pressure frequency conversion controller 1, POWER power circuits 2, pressure control monitor
3, several vent cabinet air quantity modules 4, transducer control circuit 5, fan radiating circuit 6 and other spare modules 7；It is described
POWER power circuits 2 are electrically connected with constant pressure frequency conversion controller 1, the pressure control monitor 3 and several vent cabinet air quantity
Module 4 with the constant pressure frequency conversion controller 1 be electrically connected, the constant pressure frequency conversion controller 1 respectively with the Frequency Converter Control
Circuit 5, fan radiating circuit 6 and other spare modules 7 are electrically connected.In the present embodiment, above-mentioned POWER power circuits 2 are
Whole system is powered, and it is DC24V to provide power supply, and power supply is provided to control system sensor.Pressure control monitor 3 is a pipe
The pressure change of pipeline is converted to electric signal by road static pressure transducer.Several vent cabinet air quantity modules 4 are by remote protocol handle
Air quantity data read Q inside controller it is total=Q1+Q2 ...；Air quantity data calculate pressure according to pipeline area, with this pressure
Centered on value, static pressure transducer reads current static pressure；It is compared with the static pressure of calculating, if actual measurement static pressure is quiet more than calculating
Pressure, then frequency reduces, otherwise increases.Transducer control circuit 5 is to export analog voltage 0-10V controls by controller itself to become
Frequency device frequency just maintains the static pressure in air hose.Fan radiating circuit 6 is according to the thermal resistance detection blower fan temperature in system
Just, temperature is excessively high opens radiator fan, otherwise stopping fan rotation.
Specifically, the exhaust system includes exhaust duct 8, the exhaust blower being connect with the exhaust duct 89, the row
Wind pipeline 8 is equipped with the pressure control monitor 3, and the pressure control monitor 3 is connect with pressure frequency changer circuit 10.Its
In, the junction of the exhaust duct 8 and exhaust blower 9 is equipped with air cleaning unit 11, which is at exhaust gas
Reason control, it is an individual control system.Pressure frequency changer circuit 10 is integrated in a switch board.
Specifically, the exhaust blower 9 is centrifugation exhaust blower, air draft enabling signal is that long-range wind turbine needs to start wind turbine signal
Wind turbine is set to operate.
Operational process
Parameter declaration wind pressure P, air quantity Q, section product A, density P
Wind pressure（P）=static pressure（Ps）+ dynamic pressure（Pv）
Wind speed V2=2* dynamic pressures（Pv）/p
Air quantity（Q）=wind speed (V) * sectional areas（A）
Static pressure and air quantity are opposite relationships, they condition each other, and static pressure is big, air quantity is with regard to small；Air quantity is big, static pressure is with regard to small.
By the running frequency of wind turbine, adjustment static pressure and air quantity can be controlled, the point of contact of a relative ideal is found.
Meanwhile the device in addition to the controller also have high power device grouping circuits figure, wherein SA be remotely with local
Switching switch, if pressed when with the local local boot button SB1 that connects, relay KA1 and KA2 is connect by the normally closed point of KA3
Logical, KA1 keeps work, KA1 another ways to start KM1 by the normally closed point of FR1 by contact self-locking all the way at this time, when KM1 is connected
When, exhaust blower motor radiating fan connects work by FR1.Air draft M is by Frequency Converter Control, and frequency converter is by constant pressure frequency conversion controller
Control, if SA is with long-range connect, system is remotely plugged into a little by long-range control switch connection, and KA3 and KA4 are by KA1's
Normally-closed contact is connected, and KA2 and KA4 connects the radiator fan in electric cabinet.Similarly KM1 is started by KA3, and KM1 starts exhaust blower heat dissipation work
Make.Each road indicator light of system is controlled by the contact of corresponding relay.
Specifically, the constant pressure frequency conversion controller 1 include MCU circuit modules, hour hands circuit module, reset circuit module,
Communication circuit module, adc circuit module and DAC circuit module.
Wherein, the MCU circuit modules use the ATMEGA128A microcontrollers of atmel corp, it is 8 series monolithics
Highest configures a microcontroller, and stability is high, has 53 programmable I/O, 64 pins, 0-16MHZ frequencies, 133 instructions
EEPROM etc., institute inside most of hardware multipliers that can be completed within a clock cycle, only need two clock cycle, 4K
To be widely used in various industrial control fields.
Wherein, the communication circuit module use maxim companies RS-485 chips, entitled MAX485, it have permit
Perhaps reception control, half-duplex, quiescent current only have 300UA.
Wherein, the adc circuit module uses TLC2543 chips, it has 11 analog input channels, uses serial communication
Agreement read data, high-precision 12Bit, sample frequency up to 66K, 10US conversion time；The DAC circuit module uses TI
The DAC7512 chips of company, the interior big device in output side in high precision of piece can get full width and arbitrarily export, its clock with there are one reaches
The general 3-line serial interfaces of 30MHZ, resolution can be accurately controlled frequency converter very much up to 12Bit.
In conclusion the air draft constant pressure frequency conversion control device, measures stream, with according to pressure in the way of constant pressure frequency conversion
Demand automatic frequency-conversion is adjusted, and commissioning staff only need to set a value according to root pressure and can run, if only a vent cabinet makes
With, then only needing small flow that can generate prodigious static pressure, controller can control frequency conversion, otherwise similarly.Ventilation in the device
Cabinet uses frequency control strategy, on the one hand can be energy saving, and on the other hand no matter a system opens how many vent cabinets, single
The air quantity of vent cabinet can keep substantially constant, it is ensured that and the quality of chemical experiment avoids the variation of wind speed from impacting experiment,
Overcome the disadvantage that ventilation effect is poor, noise is big in the design of traditional chemical laboratory building.
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 (9)
1. a kind of air draft constant pressure frequency conversion control device, including exhaust system and the control for controlling the exhaust system
Device, which is characterized in that the controller includes constant pressure frequency conversion controller（1）, POWER power circuits（2）, pressure control monitor
（3）, several vent cabinet air quantity modules（4）, transducer control circuit（5）, fan radiating circuit（6）With other spare modules
（7）；The POWER power circuits（2）With constant pressure frequency conversion controller（1）It is electrically connected, the pressure control monitor（3）If with
Dry platform vent cabinet air quantity module（4）With the constant pressure frequency conversion controller（1）It is electrically connected, the constant pressure frequency conversion controller（1）
Respectively with the transducer control circuit（5）, fan radiating circuit（6）With other spare modules（7）It is electrically connected.
2. a kind of air draft constant pressure frequency conversion control device according to claim 1, which is characterized in that the exhaust system packet
Include exhaust duct（8）And the exhaust duct（8）The exhaust blower of connection（9）, the exhaust duct（8）It is equipped with the pressure
Control monitor（3）, the pressure control monitor（3）With pressure frequency changer circuit（10）Connection.
3. a kind of air draft constant pressure frequency conversion control device according to claim 2, which is characterized in that the exhaust duct
（8）With exhaust blower（9）Junction be equipped with air cleaning unit（11）.
4. a kind of air draft constant pressure frequency conversion control device according to claim 2, which is characterized in that the pressure control prison
Control device（3）For static pressure transducer.
5. a kind of air draft constant pressure frequency conversion control device according to claim 2, which is characterized in that the exhaust blower（9）
To centrifuge exhaust blower.
6. a kind of air draft constant pressure frequency conversion control device according to claim 1, which is characterized in that the constant pressure frequency conversion control
Device processed（1）Including MCU circuit modules, hour hands circuit module, reset circuit module, communication circuit module, adc circuit module and
DAC circuit module.
7. a kind of air draft constant pressure frequency conversion control device according to claim 6, which is characterized in that the MCU circuits mould
Block uses ATMEGA128A microcontrollers.
8. a kind of air draft constant pressure frequency conversion control device according to claim 6, which is characterized in that the communicating circuit mould
Block uses RS-485 chips.
9. a kind of air draft constant pressure frequency conversion control device according to claim 6, which is characterized in that the adc circuit mould
Block uses TLC2543 chips, the DAC circuit module to use DAC7512 chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721723485.2U CN207907447U (en) | 2017-12-12 | 2017-12-12 | A kind of air draft constant pressure frequency conversion control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721723485.2U CN207907447U (en) | 2017-12-12 | 2017-12-12 | A kind of air draft constant pressure frequency conversion control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207907447U true CN207907447U (en) | 2018-09-25 |
Family
ID=63568022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721723485.2U Active CN207907447U (en) | 2017-12-12 | 2017-12-12 | A kind of air draft constant pressure frequency conversion control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207907447U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107906693A (en) * | 2017-12-12 | 2018-04-13 | 湖南普信工程技术有限公司 | A kind of air draft constant pressure frequency conversion control device |
-
2017
- 2017-12-12 CN CN201721723485.2U patent/CN207907447U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107906693A (en) * | 2017-12-12 | 2018-04-13 | 湖南普信工程技术有限公司 | A kind of air draft constant pressure frequency conversion control device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206257781U (en) | A kind of laboratory multistage ventilated energy-saving control system | |
| CN103324222B (en) | Heat pump laboratory temperature and humidity control and energy dissipation efficiency testing system and method | |
| CN207162759U (en) | A kind of air purifier | |
| CN108302726A (en) | A kind of laboratory multistage ventilated energy-saving control system | |
| CN207922391U (en) | A kind of high-precision constant-temperature constant-moisture control monitoring device | |
| CN107906693A (en) | A kind of air draft constant pressure frequency conversion control device | |
| CN207907447U (en) | A kind of air draft constant pressure frequency conversion control device | |
| CN204374230U (en) | Hand-held anemoscope | |
| CN205196226U (en) | A prevent condensation device for taking cooling fan rack | |
| CN206755342U (en) | A kind of intelligent fresh air apparatus and system | |
| CN209310193U (en) | Laboratory energy-saving ventilation system | |
| CN203068728U (en) | Intelligent ventilation device for laboratory | |
| CN209068669U (en) | Room pressure dynamic purification system | |
| CN208253881U (en) | The energy-saving control device of fast and stable aircraft floor air conditioner group heating leaving air temp | |
| CN201628336U (en) | System for controlling ventilation | |
| CN206609107U (en) | The energy-saving control apparatus of ventilation system of underground park | |
| CN205158120U (en) | Unattended substation gis room ventilation control system | |
| CN202918512U (en) | Energy-saving system for communication base station | |
| CN204693723U (en) | A kind of ventilating dust-arrester | |
| CN202468398U (en) | Air exhaust fan device for monitoring air humidity in kitchen | |
| CN209420173U (en) | A kind of electrical control cabinet with dehumidification function | |
| CN209588304U (en) | Low dew point double runner dehumidifier amount parameter online monitoring system complicated and changeable | |
| CN208829808U (en) | A kind of frequency-changing pressure stabilizing dust filtration device | |
| CN208001694U (en) | A kind of sugarcane cultivation greenhouse environmental detection set | |
| CN206463991U (en) | A kind of quick temperature changing test chamber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |