CN209623035U - A kind of workshop distribution ventilation automatic control system - Google Patents
A kind of workshop distribution ventilation automatic control system Download PDFInfo
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- CN209623035U CN209623035U CN201822101049.2U CN201822101049U CN209623035U CN 209623035 U CN209623035 U CN 209623035U CN 201822101049 U CN201822101049 U CN 201822101049U CN 209623035 U CN209623035 U CN 209623035U
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Abstract
The utility model provides a kind of workshop distribution ventilation automatic control system, the system includes: the first temperature transmitter, second temperature transmitter, water supply pump, programmable logic controller (PLC), the first cold wind unit being distributed in the workshop, the second cold wind unit, third cold wind unit and the first exhaust fan unit, and the third cold wind unit and first exhaust fan unit constitute unit of freely blowing.Current temperature value outside to workshop is compared with the first preset reference temperature value, the current temperature value in workshop is compared with the second preset reference temperature value simultaneously, it is determined by above-mentioned two comparison result and uses corresponding cooling method, realize the automatic control of the temperature, humidity and pressure difference in workshop, control precision is improved, production cost has been saved.
Description
Technical field
The utility model relates to plant building dcs technical field more particularly to a kind of workshop distribution are logical
Wind ventilation automatic control system.
Background technique
Large area plant building is since area is big, and part machinery equipment can generate heat, and workshop temperature is high, needs using one
The water evaporating cooling blower of money low power consumption low cost is cooled down and is sent into fresh air.Workshop can also generate it is some freely disperse it is useless
Gas is discharged to the exhaust gas of high temperature outside workshop using Wind Volume axial-flow type air-exhausting machine.Simultaneously workshop also to keep it is certain just
Pressure, keeps certain humidity.
Large area workshop is often distributed to be mounted with a large amount of air-cooler and exhaust blower, in order to cool down to workshop, excludes
Exhaust gas keeps certain humidity, keeps certain positive pressure.Operating condition is more complicated, is manually controlled very cumbersome.
Summary of the invention
Technical problem to be solved by the utility model is to provide a kind of workshop distribution ventilation automation controls
System, the system pass through the temperature value of the Current Temperatures and setting that are respectively compared in workshop, the pressure difference of current differential pressure value and setting
Value and the relationship between current humidity value and the humidity value of setting, to realize the control of the temperature in workshop, pressure difference and humidity.
In order to solve the above-mentioned technical problem, it is automatic to provide a kind of workshop distribution ventilation for the utility model embodiment one
Networked control systems, comprising: the first temperature transmitter, water supply pump, programmable logic controller (PLC), is distributed in second temperature transmitter
The first cold wind unit, the second cold wind unit, third cold wind unit and the first exhaust fan unit in the workshop, the third cold wind
Unit and first exhaust fan unit constitute unit of freely blowing, wherein；
Measured value is sent to institute for the Current Temperatures in workshop described in real-time measurement by first temperature transmitter
State programmable logic device；
Measured value is sent to institute for the Current Temperatures outside workshop described in real-time measurement by the second temperature transmitter
State programmable logic controller (PLC)；
The programmable logic controller (PLC) for control the described first free air-supply group work in the control system it is whole
It is in running order during a, the Current Temperatures outside workshop are also used to greater than working as in the first preset reference temperature and workshop
When preceding temperature is less than the second preset reference temperature, control starts the first cold wind unit work, and is also used to outside workshop
Current Temperatures when being greater than the Current Temperatures in the first preset reference temperature and workshop and being greater than the second preset reference temperature, control is opened
The water supply pump, the first cold wind unit, the second cold wind unit work are moved, the Current Temperatures being also used to outside workshop are small
In the Current Temperatures in the first preset reference temperature and workshop be greater than the second preset reference temperature when, control the water supply pump and
The second cold wind unit work, to reduce the temperature in workshop.
Wherein, the system also includes pressure difference transmitter and the second exhaust fan unit,
The pressure difference transmitter is sent out for the current differential pressure value in workshop described in real-time measurement, and by the current differential pressure value
Give the programmable logic controller (PLC)；
The programmable logic controller (PLC) is also used to be opened according to the current differential pressure value and the determination of the pressure difference reference value of setting
Second exhaust fan unit is moved, to reduce the current differential pressure in the workshop.
Wherein, the system also includes:
Humidity transmitter, the humidity transmitter is for the humidity value in workshop described in real-time measurement；
The programmable logic controller (PLC) is also used to true according to the humidity value in the workshop and the humidity reference value of setting
Surely start the cooling water pump, to increase the humidity in the workshop.
Wherein, the first cold wind unit is station air supply air-cooler, for the work position cooling in workshop.
The beneficial effect of the utility model embodiment is: the utility model passes through setting the first temperature transmitter, second
Temperature transmitter, water supply pump, programmable logic controller (PLC), the first cold wind unit, the second air-cooler being distributed in the workshop
Group, third cold wind unit and the first exhaust fan unit, to workshop outside current temperature value compare with the first preset reference temperature value
Compared with, while the current temperature value in workshop being compared with the second preset reference temperature value, pass through above-mentioned two comparison result
It determines and uses corresponding cooling method, realize the automatic control of the temperature, humidity and pressure difference in workshop, improve control precision,
Production cost is saved.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of workshop distribution ventilation automatic control system of the utility model.
Fig. 2 is that the measurement hardware circuit of the first temperature transmitter in the automatic control system of the utility model shows
It is intended to.
Fig. 3 is the measurement hardware circuit signal of the pressure difference transmitter in the automatic control system of the utility model
Figure.
Fig. 4 is the measurement hardware circuit signal of the humidity transmitter in the automatic control system of the utility model
Figure.
Fig. 5 is that the measurement hardware circuit of the second temperature transmitter in the automatic control system of the utility model shows
It is intended to.
Specific embodiment
The explanation of following embodiment be with reference to attached drawing, can be to the particular implementation implemented to example the utility model
Example.
It is illustrated referring to Fig. 1, it is automatic that the utility model embodiment one provides a kind of workshop distribution ventilation
Networked control systems, the system include: the first temperature transmitter 11, second temperature transmitter 12, water supply pump 16, programmable logic control
Device 15 processed, the first cold wind unit 17 being distributed in the workshop, the second cold wind unit 18, third cold wind unit 19, first row
Blower fan group 20, the second exhaust fan unit 21, the third cold wind unit 19 and the first exhaust fan unit 20 constitute unit of freely blowing,
In；First temperature transmitter 11 is sent to programmable patrol for the Current Temperatures in workshop described in real-time measurement, and by measured value
Collect controller 15；Measured value is sent to by second temperature transmitter 12 for the Current Temperatures outside workshop described in real-time measurement
Programmable logic controller (PLC) 15；Programmable logic controller (PLC) 15 is used for when the work that the automatic control system starts,
The control starting unit work of freely blowing, and during the entire process of automatic control system work, holding is freely blown
Unit work, the Current Temperatures for being also used to the Current Temperatures outside workshop greater than the first preset reference temperature and in workshop are less than the
When two preset reference temperature, control starts the first cold wind unit and works, and the Current Temperatures being also used to outside workshop are big
When the Current Temperatures in the first preset reference temperature and workshop are greater than the second preset reference temperature, control starts the cold water
Pump, the work of first air-cooler, the second cold wind unit are also used to the Current Temperatures outside workshop less than the first default ginseng
When examining the Current Temperatures in temperature and workshop greater than the second preset reference temperature, the water supply pump and second cold wind are controlled
Unit work, to reduce the temperature in workshop.
Specifically, which can keep a most basic ventiduct roadbed, so that machinery equipment is let out
Drain to the exhaust gas discharge workshop in workshop, it is ensured that the safety in workshop, unit system starts as long as this is freely blown, and just runs always.
Third air-supply unit 19 includes 7 air-coolers, and when the conditions are met, third air-supply unit 19 disposably starts simultaneously, this first
Exhaust fan unit 20 includes 3 exhaust blowers, and when the conditions are met, which starts work simultaneously.
Specifically, which includes 6 air-coolers, and when needing to start the first cold wind unit 17, this
6 air-coolers in one cold wind unit 17 start simultaneously, which specifically includes 7 air-coolers, when needs open
When dynamic second cold wind unit 18, successively start the air-cooler in the second cold wind unit 18, when successively starting the second cold wind unit 18
In a certain air-cooler after, if Current Temperatures have equalized or less than setting temperature value, stop start the second air-cooler
Next air-cooler of group 18 continues to start the second cold wind unit 18 if Current Temperatures are also above the temperature value of setting
In next air-cooler, the starting time interval of adjacent two air-coolers is 150 seconds in the second cold wind unit 18.
Wherein, which further includes pressure difference transmitter 14 and the second exhaust fan unit 21, and the pressure difference transmitter 14 is used for
Current differential pressure value in workshop described in real-time measurement, and the current differential pressure value is sent to the programmable logic controller (PLC)
15；The programmable logic controller (PLC) 15 is also used to determine starting institute according to the current differential pressure value and the pressure difference reference value of setting
The exhaust blower in the second exhaust fan unit 21 is stated, to reduce the current differential pressure in the workshop.
Specifically, which includes 6 exhaust blowers, is divided into 150 between the starting between adjacent exhaust blower
Second.
Wherein, which further includes humidity transmitter 13, and the humidity transmitter 13 is in workshop described in real-time measurement
Humidity value；The programmable logic controller (PLC) 15 is also used to the humidity reference value according to the humidity value in the workshop and setting
It determines and starts the cooling water pump, to increase the humidity in the workshop.
First temperature transmitter 11, second temperature transmitter 12, humidity transmitter 13 and pressure difference transmitter 14 will measure
To signal be converted to the Analog input mModule that analog signal inputs to PLC, analog signals are converted into digital letter again by PLC
Number and calculated accordingly, obtain corresponding temperature, humidity and pressure difference.
Wherein, the range of the imitated output quantity of the first temperature transmitter 11 is 0-10V, and temperature measurement range is that -40 degree arrive
80 degree, the first temperature transmitter can use model specification for watertight transducer in the room RS-WS-V10-2-4.The number of corresponding PLC
Value is 0-32000, after the data transmission that temperature transmitter obtains measurement is to PLC, mould of the PLC first to temperature transmitter measurement
Analog quantity carries out analog-to-digital conversion, and the temperature value of measurement is converted to digital quantity, the calculation formula of the actual value of temperature are as follows:
SZ30 × 10=(SZ10 × 1200/32000) -400
Wherein, SZ30 is the actual value of temperature, and SZ10 is the measured value of temperature transmitter.In specific calculating process,
It is the precision in order to improve measurement multiplied by 10, the precision of measurement is accurate to 0.1.
Specifically, the hardware circuit diagram of above-mentioned calculation formula is as shown in Figure 2, wherein and SZ10 is room temperature reading value,
SZ20 is room temperature median, and D20 is the address of SZ20, and SZ40 is indoor kelvin rating, and D40 is the address of SZ40,
SZ30 is indoor actual temperature value.
The imitated output quantity signal of pressure difference transmitter is 0-10V, measurement range 0-100Pa, and pressure difference transmitter can adopt
With the pressure difference transmitter of model QBM2030-1U0-100Pa.The corresponding numerical value of PLC is 0-32000, the meter of the actual value of pressure difference
Calculate formula are as follows:
SZ32 × 10=SZ12 × 1000/32000
Wherein, SZ32 is the actual value of pressure difference, and SZ12 is the measured value of pressure difference transmitter, and actual value is participated in transporting multiplied by 10
The computational accuracy of pressure difference is increased to 0.1Pa by the precision that display is improved when calculation.
Specifically, the hardware circuit diagram of pressure difference calculation formula is as shown in figure 3, wherein SZ12 is that pressure difference transmitter measurement obtains
Pressure difference, SZ22 be pressure difference calculate median, D22 be SZ22 address, SZ32 be actual pressure difference.
It is 0-10V that humidity transmitter, which exports analog signals, and the corresponding numerical value of measurement range 0-100%, PLC is 0-
32000, the calculation formula of the actual value of humidity are as follows:
SZ34 × 10=SZ14 × 1000/32000
Wherein, SZ34 is actual humidity value, and SZ14 is the measured value of humidity transmitter, and actual value is participated in operation multiplied by 10
When in order to improve the precision of display, the computational accuracy of humidity is increased to 0.1 degree Celsius.
Specifically, Formulae For Atmospheric Humidity built circuit diagram as shown in figure 4, wherein SZ14 be humidity transmitter measurement obtain
The humidity value obtained, SZ24 are that humidity calculates median, and D24 is the address of SZ24, and SZ34 is actual humidity value.
Wherein, the range of the imitated output quantity of second temperature transmitter is 0-10V, and temperature measurement range is -40 degree to 80
Degree, second temperature transmitter can use model specification for RS-WS-V10-2-4 outdoor water-proof probe.The numerical value of corresponding PLC
For 0-32000, after the data transmission that temperature transmitter obtains measurement is to PLC, simulation of the PLC first to temperature transmitter measurement
Amount carries out analog-to-digital conversion, and the temperature value of measurement is converted to digital quantity, the calculation formula of the actual value of temperature are as follows:
SZ36 × 10=(SZ16 × 1200/32000) -400
Wherein, SZ36 is the actual value of temperature, and SZ16 is the measured value of temperature transmitter.In specific calculating process,
It is the precision in order to improve measurement multiplied by 10, the precision of measurement is accurate to 0.1.
Specifically, the hardware circuit diagram of above-mentioned calculation formula is as shown in Figure 5, wherein and SZ16 is outdoor temperature reading value,
SZ26 is outdoor temperature median, and SZ46 is outdoor kelvin rating, and SZ36 is outdoor actual temperature value.
The working method of the control system are as follows:
After starting unit of freely blowing, if the temperature outside workshop is greater than 25 degrees Celsius, while the temperature in workshop
Less than 30 degrees Celsius, then starts the first air-supply unit to cooling down in workshop, since pressure fan works, lead to pressure difference in workshop
Increase, if pressure difference is greater than 20Pa, just successively starts the exhaust blower in the second exhaust fan unit, workshop is made to keep certain micro-positive pressure
(5-20Pa).At this time if humidity is less than 75%, cooling water pump operation.
When the temperature outside workshop be more than or equal to 25 DEG C, while the temperature in workshop be greater than 30 DEG C, then start cooling water supply pump
Cooling down, after the first cold wind unit of starting is worked, the air-cooler also successively started in the second cold wind unit works,
After a certain air-cooler started in the second air-supply unit, the temperature in workshop just drops to 30 DEG C, then stopping starting
Subsequent inactive air-cooler in second cold wind unit.Since pressure difference is increased when pressure difference is greater than 20Pa, just successively start
Exhaust blower in second exhaust fan unit makes workshop keep the micro-positive pressure of 5-20Pa.
When the temperature outside workshop is less than 25 DEG C, while the temperature in workshop is greater than 30 DEG C, then starts cooling water supply pump and carry out
Cooling, while successively starting the air-cooler in the second cold wind unit, after starting a certain air-cooler in the second cold wind unit,
The temperature in workshop just drops to 30 DEG C, then stopping air-cooler inactive below in the second cold wind unit of starting.Work as pressure difference
When greater than 20Pa, just successively start the exhaust blower in the second exhaust fan unit, workshop is made to keep the micro-positive pressure of 5-20Pa.
When the temperature outside workshop is less than or equal to 25 DEG C, while the temperature in workshop is less than 30 DEG C, then do not need to carry out it
He operates, which needs only be such that unit work of freely blowing.
It should be noted that the second cold wind unit and the second exhaust fan unit, when the conditions are met, air-cooler therein and row
Blower is the process successively started, when the conditions are not met, in the air-cooler and the second exhaust fan unit in the second cold wind unit
Exhaust blower is also the process successively exited, by taking the exiting of the air-cooler in the second cold wind unit as an example, when closing a certain cold wind
When machine, judge whether current temperature is less than a certain set temperature, if it is less, continue to close next air-cooler, if
It is greater than, then lower air-cooler of phase down.
The utility model passes through setting the first temperature transmitter, second temperature transmitter, water supply pump, Programmable logical controller
Device, the first cold wind unit being distributed in the workshop, the second cold wind unit, third cold wind unit and the first exhaust fan unit are right
Current temperature value outside workshop is compared with the first preset reference temperature value, while by the current temperature value and second in workshop
Preset reference temperature value is compared, and is determined by above-mentioned two comparison result and is used corresponding cooling method, realizes workshop
Temperature, humidity and pressure difference automatic control, improve control precision, saved production cost.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore equivalent changes made in accordance with the claims of the present invention, is still within the scope of the present invention.
Claims (4)
1. a kind of workshop distribution ventilation automatic control system characterized by comprising the first temperature transmitter,
Two temperature transmitters, water supply pump, programmable logic controller (PLC), the first cold wind unit, the second cold wind being distributed in the workshop
Unit, third cold wind unit and the first exhaust fan unit, the third cold wind unit and first exhaust fan unit constitute freedom
Air-supply unit, wherein；
First temperature transmitter for the Current Temperatures in workshop described in real-time measurement, and by measured value be sent to it is described can
Programmed logic device；
The second temperature transmitter for the Current Temperatures outside workshop described in real-time measurement, and by measured value be sent to it is described can
Programmed logic controller；
The programmable logic controller (PLC) is for controlling the entire mistake that the described first free air-supply group works in the control system
It is in running order in journey, the Current Temperatures outside workshop are also used to greater than the current temperature in the first preset reference temperature and workshop
When degree is less than the second preset reference temperature, control starts the first cold wind unit work, and is also used to working as outside workshop
When preceding temperature is greater than the Current Temperatures in the first preset reference temperature and workshop greater than the second preset reference temperature, control starting institute
Water supply pump, the first cold wind unit, the second cold wind unit work are stated, is also used to Current Temperatures outside workshop less than the
When Current Temperatures in one preset reference temperature and workshop are greater than the second preset reference temperature, the water supply pump and described is controlled
Second cold wind unit work, to reduce the temperature in workshop.
2. system according to claim 1, which is characterized in that the system also includes pressure difference transmitter and the second air drafts
Unit,
The current differential pressure value is sent to by the pressure difference transmitter for the current differential pressure value in workshop described in real-time measurement
The programmable logic controller (PLC)；
The programmable logic controller (PLC) is also used to determine starting institute according to the current differential pressure value and the pressure difference reference value of setting
The second exhaust fan unit is stated, to reduce the current differential pressure in the workshop.
3. system according to claim 2, which is characterized in that the system also includes:
Humidity transmitter, the humidity transmitter is for the humidity value in workshop described in real-time measurement；
The programmable logic controller (PLC) is also used to be opened according to the humidity value in the workshop and the determination of the humidity reference value of setting
The cooling water pump is moved, to increase the humidity in the workshop.
4. system according to claim 3, which is characterized in that
The first cold wind unit is station air supply air-cooler, for the work position cooling in workshop.
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| CN201822101049.2U CN209623035U (en) | 2018-12-14 | 2018-12-14 | A kind of workshop distribution ventilation automatic control system |
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| CN201822101049.2U CN209623035U (en) | 2018-12-14 | 2018-12-14 | A kind of workshop distribution ventilation automatic control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579241A (en) * | 2018-12-14 | 2019-04-05 | 汕头市东方科技有限公司 | A kind of workshop distribution ventilation automatic control system and its control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579241A (en) * | 2018-12-14 | 2019-04-05 | 汕头市东方科技有限公司 | A kind of workshop distribution ventilation automatic control system and its control method |
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