CN209801717U - Full-automatic constant air volume control system - Google Patents
Full-automatic constant air volume control system Download PDFInfo
- Publication number
- CN209801717U CN209801717U CN201920083515.0U CN201920083515U CN209801717U CN 209801717 U CN209801717 U CN 209801717U CN 201920083515 U CN201920083515 U CN 201920083515U CN 209801717 U CN209801717 U CN 209801717U
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- China
- Prior art keywords
- air
- sub
- control unit
- main
- air duct
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- 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.)
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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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- Ventilation (AREA)
- Air Conditioning Control Device (AREA)
Abstract
the utility model discloses a full-automatic constant air volume control system, which comprises a main air duct and a fan, wherein a plurality of sub air ducts are arranged at the air outlet of the main air duct, and the sub air ducts are used for guiding fresh air into a room; the utility model also comprises an automatic control unit which is provided with a data acquisition unit for detecting the air velocity flowing through the main air duct in real time and sending the air velocity to the PLC control unit; the PLC control unit is used for comparing the received air flow speed with a preset value and sending a control signal to the execution adjusting unit of the main air duct according to the comparison result; the wind speed setting unit is used for sending a wind speed set value to the PLC control unit, and the PLC control unit sends a control signal to the execution adjusting unit of the sub-air channel according to the wind speed set value; the execution adjusting unit is used for adjusting the air quantity sent into the room by rotating the air door under the control of the PLC control unit; and the feedback adjusting unit is used for correcting the wind speed provided by the execution adjusting unit.
Description
Technical Field
The utility model relates to an intelligent field of exhaust system, specifically speaking, in particular to full-automatic invariable control system of amount of wind.
background
in places such as coating production lines, superstores, hospitals and the like where air supply/exhaust systems are provided, air doors are arranged on air pipes, and air supply/exhaust volume and air pressure are adjusted by changing the opening of air door blades.
The drawbacks of this adjustment are:
1) Due to the lack of reliable and effective detection means for the air quantity, the air quantity adjusting process is often changed into the adjustment of the wind direction at last, namely, debugging personnel only need to adjust the wind direction shown on the exhaust flow chart, and the debugging is regarded as qualified.
2) when the air supply and exhaust system is in normal use, the blocked objects on the filter screen for filtering air are more and more along with the time, so that the static pressure of the filter screen is higher and higher. In the process, the actual air volume in the air supply and exhaust system is always in a slowly reduced state.
In addition, patent document No. 201520207978.5 discloses an exhaust system, and it includes exhaust fan and exhaust pipe, still includes converter, frequency conversion control circuit and is used for detecting the static pressure sensor of the inside and outside pressure differential of exhaust pipe, static pressure sensor installs in the exhaust pipe, frequency conversion control circuit is connected with the converter electricity, the exhaust fan with the converter electricity is connected, the converter is used for adjusting according to the settlement amount of wind of exhaust pipe the rotational speed of exhaust fan.
the frequency converter in the scheme is used for controlling the air volume of the main air duct, and the changed air volume can be averagely distributed to each branch. This control method cannot realize precise control of each branch.
SUMMERY OF THE UTILITY MODEL
an object of the utility model is to provide a not enough among the prior art, provide a full-automatic amount of wind constant control system to solve the problem that exists among the prior art.
the utility model provides a technical problem can adopt following technical scheme to realize:
a full-automatic constant air volume control system comprises a main air duct and a fan arranged in the main air duct, wherein an air inlet of the main air duct is communicated with the outside and used for introducing fresh air; a plurality of sub-air ducts are arranged at the air outlet of the main air duct, one ends of the sub-air ducts are communicated with the main air duct, the other ends of the sub-air ducts are communicated with a room, and the sub-air ducts are used for introducing fresh air into the room;
Also comprises an automatic control unit which is provided with
The data acquisition unit is arranged in the main air duct and is used for detecting the air flow speed flowing through the main air duct in real time and sending the air flow speed to the PLC control unit;
The PLC control unit is used for comparing the received air flow speed with a preset value and sending a control signal to the execution adjusting unit of the main air duct according to the comparison result;
The wind speed setting unit is arranged in the room and used for sending a wind speed set value of each room of the room to the PLC control unit, and the PLC control unit sends a control signal to the execution adjusting unit of the sub-air duct according to the wind speed set value;
The execution adjusting unit comprises a frequency converter, a motor and an air door; the frequency converter is used for adjusting the power of the fan under the control of the PLC control unit to adjust the total air volume; the motor is used for rotating the air door under the control of the PLC control unit to adjust the air quantity sent into the room;
the feedback adjusting unit is arranged on a main air speed transmitter at the air outlet of the main air channel and a sub air speed transmitter at the air outlet of the sub air channel; the main wind speed transmitter is used for detecting the wind speed of the main wind channel air outlet, the sub-wind speed transmitter is used for detecting the wind speed of the sub-wind channel air outlet, and the PLC control unit corrects and executes the wind speed provided by the adjusting unit according to the wind speeds sent by the main wind speed transmitter and the sub-wind speed transmitter.
Compared with the prior art, the beneficial effects of the utility model reside in that:
The air supply/exhaust system has the advantages of simple structure and ingenious design, can automatically adjust the air quantity in the air pipe only by setting relevant parameters, and realizes the intellectualization of air supply/exhaust, thereby solving the problems that the air quantity in the existing air supply/exhaust system can not be accurately adjusted and the air quantity is continuously reduced.
drawings
Fig. 1 is a schematic structural view of a full-automatic constant air volume control system of the present invention.
Fig. 2 is a flow chart of the full-automatic constant air volume control system of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.
Referring to fig. 1 and 2, the full-automatic constant air volume control system of the present invention comprises a main air duct (1) and a fan (2) installed in the main air duct (1), wherein an air inlet of the main air duct (1) is communicated with the outside and used for introducing fresh air; a plurality of sub-air ducts (3) are arranged at the air outlet of the main air duct (1), one ends of the sub-air ducts (3) are communicated with the main air duct (1), the other ends of the sub-air ducts (3) are communicated with the room (4), and the sub-air ducts (3) are used for introducing fresh air into the room (4);
The utility model discloses still include the automatic control unit, the automatic control unit has
The data acquisition unit is arranged in the main air duct (1) and is used for detecting the air flow speed flowing through the main air duct (1) in real time and sending the air flow speed to the PLC control unit;
the PLC control unit is used for comparing the received air flow speed with a preset value and sending a control signal to an execution adjusting unit of the main air duct (1) according to a comparison result;
The wind speed setting unit is arranged in the room (4) and used for sending a wind speed set value of each room of the room (4) to the PLC control unit, and the PLC control unit sends a control signal to the execution adjusting unit of the sub-air duct (3) according to the wind speed set value;
The execution adjusting unit comprises a frequency converter, a motor and an air door; the frequency converter is used for adjusting the power of the fan (2) under the control of the PLC control unit to adjust the total air volume; the motor is used for rotating the air door under the control of the PLC control unit to adjust the air volume sent into the room (4);
The feedback adjusting unit is arranged on a main wind speed transmitter (5) at the air outlet of the main air duct (1) and a sub-wind speed transmitter (6) at the air outlet of the sub-air duct (3); the main air speed transmitter (5) is used for detecting the air speed of the air outlet of the main air duct (1), the sub air speed transmitter (6) is used for detecting the air speed of the air outlet of the sub air duct (3), and the PLC control unit corrects and executes the air speed provided by the adjusting unit according to the air speeds sent by the main air speed transmitter (5) and the sub air speed transmitter (6).
the utility model discloses a control process as follows:
1) Setting the required air volume of the current room (4) through an air speed setting unit, wherein the sum of the required air volumes of all the rooms (4) is the total air volume to be introduced by the fan (2), the required air volumes of all the rooms (4) are all sent to a PLC control unit, and the PLC control unit calculates V according to a formula Q;
wherein Q represents the total air volume in m3H; v represents the wind speed, which is in m/s; f represents the cross-sectional area of the main air duct (1) and the unit is m2(ii) a K represents a loss ratio, which is a constant;
2) According to the calculated V value, the PLC control unit sends a corresponding control signal to the frequency converter, and the frequency converter controls the fan (2) to work at corresponding power to provide the total air quantity Q required by the system;
3) the PLC control unit sends a control signal to a corresponding motor according to the proportion of a set value, and the motor enables the air quantity sent into the room (4) to be equal to the set value of the air speed setting unit through the angle of the air door;
4) the main air speed transmitter (5) and the sub air speed transmitter (6) detect the air speeds of the main air duct (1) and the sub air duct (3) in real time and feed the air speeds back to the PLC control unit, and the PLC control unit corrects the air speed provided by the execution adjusting unit after processing so as to keep the air quantity constant.
the basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. a full-automatic constant air volume control system comprises a main air duct (1) and a fan (2) arranged in the main air duct (1), wherein an air inlet of the main air duct (1) is communicated with the outside and used for introducing fresh air; a plurality of sub-air ducts (3) are arranged at the air outlet of the main air duct (1), one ends of the sub-air ducts (3) are communicated with the main air duct (1), the other ends of the sub-air ducts (3) are communicated with the room (4), and the sub-air ducts (3) are used for introducing fresh air into the room (4);
it is characterized by also comprising an automatic control unit which is provided with
The data acquisition unit is arranged in the main air duct (1) and is used for detecting the air flow speed flowing through the main air duct (1) in real time and sending the air flow speed to the PLC control unit;
the PLC control unit is used for comparing the received air flow speed with a preset value and sending a control signal to an execution adjusting unit of the main air duct (1) according to a comparison result;
The wind speed setting unit is arranged in the room (4) and used for sending a wind speed set value of each room of the room (4) to the PLC control unit, and the PLC control unit sends a control signal to the execution adjusting unit of the sub-air duct (3) according to the wind speed set value;
The execution adjusting unit comprises a frequency converter, a motor and an air door; the frequency converter is used for adjusting the power of the fan (2) under the control of the PLC control unit to adjust the total air volume; the motor is used for rotating the air door under the control of the PLC control unit to adjust the air volume sent into the room (4);
the feedback adjusting unit is arranged on a main wind speed transmitter (5) at the air outlet of the main air duct (1) and a sub-wind speed transmitter (6) at the air outlet of the sub-air duct (3); the main air speed transmitter (5) is used for detecting the air speed of the air outlet of the main air duct (1), the sub air speed transmitter (6) is used for detecting the air speed of the air outlet of the sub air duct (3), and the PLC control unit corrects and executes the air speed provided by the adjusting unit according to the air speeds sent by the main air speed transmitter (5) and the sub air speed transmitter (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920083515.0U CN209801717U (en) | 2019-01-18 | 2019-01-18 | Full-automatic constant air volume control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920083515.0U CN209801717U (en) | 2019-01-18 | 2019-01-18 | Full-automatic constant air volume control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209801717U true CN209801717U (en) | 2019-12-17 |
Family
ID=68820392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920083515.0U Expired - Fee Related CN209801717U (en) | 2019-01-18 | 2019-01-18 | Full-automatic constant air volume control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209801717U (en) |
-
2019
- 2019-01-18 CN CN201920083515.0U patent/CN209801717U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191217 Termination date: 20210118 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |