CN205909880U - Amount of wind measurement and control device - Google Patents
Amount of wind measurement and control device Download PDFInfo
- Publication number
- CN205909880U CN205909880U CN201521009187.8U CN201521009187U CN205909880U CN 205909880 U CN205909880 U CN 205909880U CN 201521009187 U CN201521009187 U CN 201521009187U CN 205909880 U CN205909880 U CN 205909880U
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- control module
- pressure
- pressure difference
- main control
- air quantity
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Abstract
The utility model provides an adjust accurate convenient amount of wind measurement and control device, including installing the orifice plate in the pipeline or the pipe of all inviting for detect the orifice plate or all invite and manage the pressure difference transmitter of front and back both sides pressure, pressure difference transmitter links to each other with control module, control module links to each other with frequency conversion module, control module includes main control chip and display circuit, pressure difference transmitter passes through the high accuracy elementary errors and presses the detection chip to be voltage variation with the output of both ends pressure variation, and rethread amplification and filtering circuit forms output voltage to send control module's main control chip to, main control chip carries out amount of wind operation, analysis according to the voltage signal who receives and to frequency conversion module's control, it shows in real time to pass through the display circuit with the amount of wind that calculates again.
Description
Technical field
This utility model is related to a kind of measure and control device, especially a kind of air quantity measure and control device.
Background technology
In the ventilation of existing pipeline, be frequently encountered length change with air pipeline, the change of ventilation caliber or
Because the change of filter resistance leads to ventilation because of the change of resistance in air pipeline in air pipeline, thus affecting to use, especially
It is in the air pipeline with filter, and blower fan works continuous according to the pattern of power frequency, originally due to the resistance of filter
Power is less, and air quantity is typically larger than the nominal air delivery of filter, so can produce impact to filter filter efficiency, and with filtration
The continuing on of device, resistance increases, and air quantity reduces therewith, thus affecting air feed effect, therefore in the ventilation duct with filter
In road increase a device automatically adjusting air quantity, be allowed to the requirement of self adaptation nominal air delivery, in effectively solving air pipeline because
Pipeline internal resistance increases and affects ventilation effect.
There is also similar products in Ventilation Control field at present, the pattern being typically with even speed tube, to measure air quantity, is
Control module provides air quantity feedback of the information, but even speed tube has certain limitation, and first certainty of measurement is relatively low, uncertainty
Generally 10% about, second, the lower limit of measurement is low, the accuracy of less than 1/3 measurement of nominal air delivery is very low.
Utility model content
This utility model provides a kind of regulation accurately convenient air quantity measure and control device.
Realize the air quantity measure and control device of this utility model purpose, including the orifice plate being arranged in pipeline or even speed tube, be used for
The pressure difference transmitter of pressure at both sides before and after detection orifice plate or even speed tube；Described pressure difference transmitter is connected with control module, described control
Molding block is connected with frequency-variable module；Described control module includes main control chip and display circuit；
Described pressure difference transmitter passes through high accuracy differential pressure detection chip and pressure at two ends change is output as change in voltage, then
By filtering and amplifying circuit, formation output voltage signal, and send the main control chip of control module to, main control chip is according to reception
Voltage signal carry out air quantity computing, analysis and the control to frequency-variable module；Again that the air quantity calculating is real by display circuit
When display.
The having the beneficial effect that of air quantity measure and control device of the present utility model:
Air quantity measure and control device of the present utility model, air quantity measure and control device is changed by the air quantity that differential pressure pickup detects,
Internal system automatically adjusts, and is allowed to meet the requirement of actual wind supply quantity, greatly reduces energy consumption；The letter of air quantity measure and control device structure
List, low cost, and regulation precisely facilitate.
Brief description
Fig. 1 is the structural representation of air quantity measure and control device of the present utility model.
Specific embodiment
As shown in fig. 1, air quantity measure and control device of the present utility model, including the orifice plate being arranged in pipeline or even speed tube, uses
The pressure difference transmitter of pressure at both sides before and after detection orifice plate or even speed tube；Described pressure difference transmitter is connected with control module, described
Control module is connected with frequency-variable module；Described control module includes main control chip and display circuit；
Described pressure difference transmitter passes through high accuracy differential pressure detection chip and pressure at two ends change is output as change in voltage, then
By filtering and amplifying circuit, formation output voltage signal, and send the main control chip of control module to, main control chip is according to reception
Voltage signal carry out air quantity computing, analysis and the control to frequency-variable module；Again that the air quantity calculating is real by display circuit
When display.
Air quantity measure and control device of the present utility model, in air quantity measure and control device, upper in orifice plate or even speed tube installation site
Pressure at both sides is delivered to pressure difference transmitter by silica gel hose by the annular pressure of downstream both sides.
Pressure difference transmitter is the circuit integrated module that high accuracy differential pressure detection chip is core, using sm5878 series pressure
Poor chip.Change the pressure change that pressure reduction chip inputs two ends, chip output voltage changes, by filtering and amplifying circuit,
Form output pressure signal.Orifice plate both sides pressure difference is transferred to control by analog quantity (0-5v) voltage signal by pressure difference transmitter
Module.
Control module is made up of main control chip and display circuit board two parts, main control chip by 3 road analog input ports,
2 roads analog output port, 2 way switch amount output ports.Air quantity computing, analysis and to frequency-variable module control all by master control electricity
Road plate completes.Air quantity shows in real time, and parameters set and completed by display circuit board.The analog quantity that pressure difference transmitter transmits
Signal, control module draws actual air volume according to inner equation computing, and actual air volume is transferred to display circuit board, display circuit board
Actual air volume is shown in real time on panel.Control module compares the airflow value setting simultaneously, if calculate goes out the actual wind of pipeline
Amount and setting value compare difference big 5%, then export and reduce to frequency-variable module signal value；If calculate go out pipeline actual air volume little with
Setting value comparison difference is little by 5%, then export and increase to frequency-variable module signal value；If calculate goes out pipeline actual air volume and setting value
Compare difference within 5%, then export constant to frequency-variable module signal value.
Control module corresponds to converter output frequency 0-50hz by (0-5v) analog quantity voltage signal.
Frequency-variable module rated power 3.0kw, operating frequency is 0-50hz, and response speed 5hz/s is controlled by analog quantity (0-5v)
Frequency processed.The Analog control signal that frequency-variable module is exported by reading control module after starting, automated tos respond to output services frequency
Rate.
Air quantity measure and control device mainly by: control module, differential pressure transmitter, frequency-variable module etc. form.Control module sets
Fixed required actual air volume of divulging information, startup optimization air quantity measure and control device, system is passed through to measure the orifice plate pre-post difference installed on pipeline
Pressure carrys out Automatic computing system actual air volume size, and such as air pipeline changes, then the actual wind supply quantity of deferent of divulging information is also therewith
Change, according to the change of air quantity, the orifice plate differential pressure value that differential pressure transmitter detects, the form being converted to analog quantity is sent to simulation
In amount control module, and then the size of control frequency-variable module output frequency, thus adjusting ventilation blower running speed, meeting pipeline and leading to
The demand of the actual motion air quantity of wind.
This device carries out air measuring using orifice plate, and the certainty of measurement of orifice plate is 3% about, compared to even speed tube, precision
Greatly improve；The lower limit simultaneously measuring is higher, can reach the 10% about of nominal air delivery.Air quantity measure and control device is then according to reality
The change of Shi Fengliang, the output frequency of continual regulation converter, thus reaching the size automatically controlling fan delivery, with full
The actual requirement of sufficient pipe ventilated.
Embodiment described above is only preferred implementation of the present utility model to be described, not to this practicality
New scope is defined, under the premise of without departing from this utility model design spirit, this area ordinary skill technical staff couple
Various modifications and improvement that technical solutions of the utility model are made, all should fall into the guarantor that claims of the present utility model determine
In the range of shield.
Claims (1)
1. air quantity measure and control device it is characterised in that: include being arranged on orifice plate or even speed tube in pipeline, for detecting orifice plate or all
The pressure difference transmitter of pressure at both sides before and after fast pipe；Described pressure difference transmitter is connected with control module, described control module and frequency conversion
Module is connected；Described control module includes main control chip and display circuit；
Described pressure difference transmitter passes through high accuracy differential pressure detection chip and pressure at two ends change is output as change in voltage, then passes through
Filtering and amplifying circuit, formation output voltage signal, and send the main control chip of control module to, main control chip is according to the electricity receiving
Pressure signal carries out air quantity computing, analysis and the control to frequency-variable module；Again the air quantity calculating is shown in real time by display circuit
Show.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521009187.8U CN205909880U (en) | 2015-12-09 | 2015-12-09 | Amount of wind measurement and control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521009187.8U CN205909880U (en) | 2015-12-09 | 2015-12-09 | Amount of wind measurement and control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205909880U true CN205909880U (en) | 2017-01-25 |
Family
ID=57814021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521009187.8U Active CN205909880U (en) | 2015-12-09 | 2015-12-09 | Amount of wind measurement and control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205909880U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112267908A (en) * | 2020-09-28 | 2021-01-26 | 安徽华城兴建材科技有限公司 | Built-in ventilation pipe of reinforced fiber cement explosion-proof wall |
-
2015
- 2015-12-09 CN CN201521009187.8U patent/CN205909880U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112267908A (en) * | 2020-09-28 | 2021-01-26 | 安徽华城兴建材科技有限公司 | Built-in ventilation pipe of reinforced fiber cement explosion-proof wall |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |