CN107062511A - A kind of distributed variable air rate supply air system and its control method - Google Patents
A kind of distributed variable air rate supply air system and its control method Download PDFInfo
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- CN107062511A CN107062511A CN201710517302.XA CN201710517302A CN107062511A CN 107062511 A CN107062511 A CN 107062511A CN 201710517302 A CN201710517302 A CN 201710517302A CN 107062511 A CN107062511 A CN 107062511A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000003068 static effect Effects 0.000 claims abstract description 39
- 230000007613 environmental effect Effects 0.000 claims abstract description 25
- 239000012636 effector Substances 0.000 claims description 16
- 238000005265 energy consumption Methods 0.000 claims description 15
- 230000008859 change Effects 0.000 claims description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 2
- 239000001569 carbon dioxide Substances 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 241000790917 Dioxys <bee> Species 0.000 claims 1
- 238000004378 air conditioning Methods 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 12
- 230000008901 benefit Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 229960004424 carbon dioxide Drugs 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of distributed variable air rate supply air system and its control method, system is included once, overfire air fan, air-supply main Electric air valve, blowpipe Electric air valve, main control cabinet, end-of-pipe control cabinet, environmental feedback device and static pressure transducer, primary air fan is arranged on air-supply main port, air-supply main Electric air valve is arranged on air-supply main, blowpipe Electric air valve is arranged on blowpipe port, overfire air fan is arranged on blowpipe, environmental feedback device sets each room, static pressure transducer is arranged on air-supply main line end, main control cabinet simultaneously and primary air fan, air-supply main Electric air valve and static pressure transducer are electrically connected, end-of-pipe control cabinet is electrically connected with blowpipe Electric air valve and environmental feedback device simultaneously.Present invention also offers the control method of above supply air system.Apparatus of the present invention and method can accurately meet the real-time variable air rate demand in each room and thermal comfort demand, moreover it is possible to realize the energy-efficient operation of whole system.
Description
Technical field
The invention belongs to building energy conservation and air conditioner ventilation control field, and in particular to a kind of distributed variable air rate supply air system
And its control method.
Background technology
As China's skyscraper, office building, restaurant, hotel are continuously increased, and the extensive of subway station is built, in
The usage amount of centre air-conditioning is also being continuously increased, and air-conditioning system is more complicated, huge, and the proportion in whole building energy consumption is also more next
It is bigger.Because air conditioning energy consumption accounts for whole building energy consumption more than 60%, therefore air conditioner energy saving seems and become more and more important.
According to relevant statistics, the time of air-conditioning equipment 97% operates in fluctuates above and below 70% load, therefore using change
Air quantity air-conditioning can reduce air-conditioning power consumption, reach the purpose of economical operation.According to test, the energy consumption of an air conditioning system with variable is about
For the 70% of constant air volume system, if using more preferable control method, its energy-saving effect will be more significant.In addition, in some temperature
The place changed greatly is spent, Constant air volume system can not accurately meet the frequent change of room load and local temperature change
Requirement.
Due to the difference of room layout, the length of the blowpipe corresponding to each room is often widely different, so as to will make
Waterpower into each blowpipe is uneven.Common, in the design phase, designer is each by adjusting the size of airduct, control
Waterpower unbalance factor between branch road is within 15%, however, this mode still can not eliminate the waterpower of each blowpipe not
Balance, before running, in addition it is also necessary to which system debug personnel are carried out repeatedly by adjusting the open degree of air-valve to supply air system
Debugging, so that the air output in each room substantially meets design requirement.
Obviously, this workload that will greatly increase designer and system debug personnel；Meanwhile, room air quantity is individually controllable
Property processed is poor, it is impossible to adjust room air output according to the respective load variations in room, indivedual room air outputs are bigger than normal or less than normal
Situation can not be avoided, the thermal comfort that have impact on air-conditioning system of high degree.
Accordingly, it would be desirable to develop a kind of new supply air system and its control method, it is desirable to which it can accurately meet each room
Real-time variable air rate demand and thermal comfort demand, while the energy-efficient operation of whole distributing system can be realized.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, the invention provides a kind of distributed variable air rate supply air system
And its control method, it is intended that accurately meeting the real-time variable air rate demand in each room and thermal comfort demand
Meanwhile, realize the energy-efficient operation of whole distributing system.
To achieve the above object, according to one aspect of the present invention there is provided a kind of distributed variable air rate supply air system, its
The multiple blowpipes connected including air-supply main and with air-supply main, each blowpipe connects different air-conditioned rooms, its
Also include primary air fan, blow main Electric air valve, blowpipe Electric air valve, overfire air fan, main control cabinet, end-of-pipe control
Cabinet, environmental feedback device and static pressure transducer, wherein, primary air fan is arranged on air-supply main port, the electronic wind of main of blowing
Valve is arranged on air-supply main, and is located at primary air fan air outlet downstream and blowpipe air inlet upstream, main of blowing simultaneously
Electric air valve is used to control air quantity in air-supply main by adjusting the opening and closing of itself valve port, and blowpipe Electric air valve, which is arranged on, to be sent
Wind branch pipe port, overfire air fan is arranged on blowpipe and positioned at the wind direction downstream of blowpipe Electric air valve, and environment is anti-
Feedback device is set in each air-conditioned room, and temperature or air quality for reacting each air-conditioned room, static pressure transducer are set
In air-supply main line end, for measuring the blast size in air-supply main, main control cabinet is simultaneously dry with primary air fan, air-supply
Pipe Electric air valve and static pressure transducer are electrically connected, and are adjusted for blast size in the air-supply main that is fed back according to static pressure transducer
The operating frequency of primary air fan is saved, is additionally operable to be opened and closed air-supply main Electric air valve, end according to the operating frequency of primary air fan
Switch board is electrically connected with overfire air fan, blowpipe Electric air valve and environmental feedback device simultaneously, for according to environmental feedback device
Temperature or air quality adjust the operating frequency and start and stop blowpipe Electric air valve of overfire air fan in the air-conditioned room of feedback.
Further, main control cabinet include main power supply air switch, main air blower control module, main air valve control module,
Main air blower frequency converter and the main actuator of Electric air valve, wherein, main power supply air switch is used to control in whole main control cabinet
The on/off of electrical equipment, main air blower control module is mutually electrically connected with static pressure transducer, main air blower frequency converter simultaneously, and blower fan becomes
Frequency device is electrically connected with primary air fan, and it is big that main air blower control module is used for blast in the air-supply main that feeds back according to static pressure transducer
It is small to send frequency variation signal, and the frequency variation signal is transmitted to main air blower frequency converter, so that the operating frequency of primary air fan is adjusted,
Main air valve control module is mutually electrically connected with static pressure transducer, the main actuator of Electric air valve simultaneously, and Electric air valve master holds
Row device is also mutually electrically connected with air-supply main Electric air valve simultaneously, and main air valve control module is used for according to sending that static pressure transducer feeds back
Air-dry blast size in pipe and send air-valve control signal, and the air-valve control signal is transmitted to the main actuator of Electric air valve, from
And start and stop air-supply main Electric air valve.
Further, end-of-pipe control cabinet includes branch pipe power supply air switch, tail-end blower fan control module, the control of end air-valve
Module, tail-end blower fan frequency converter and Electric air valve end effector,
Wherein, branch pipe power supply air switch is used for the on/off for controlling electrical equipment in whole end-of-pipe control cabinet,
Tail-end blower fan control module is mutually electrically connected with environmental feedback device, tail-end blower fan frequency converter simultaneously, tail-end blower fan frequency conversion
Device is electrically connected with overfire air fan, and tail-end blower fan control module is used for the actual temperature of the air-conditioned room fed back according to environmental feedback device
Degree or air quality send frequency variation signal, and the frequency variation signal is transmitted to tail-end blower fan frequency converter, so as to adjust Secondary Air
The operating frequency of machine,
End air-valve control module is mutually electrically connected with environmental feedback device, Electric air valve end effector simultaneously, Electric air valve
End effector is also mutually electrically connected with blowpipe Electric air valve simultaneously, and end air-valve control module is used for according to environmental feedback device
The indoor temperature or air quality of feedback send air-valve control signal, and the air-valve control signal is transmitted to Electric air valve end
Actuator is held, so as to control the opening and closing of blowpipe Electric air valve.
Further, the environmental feedback device is for the temperature sensor of direct measurement indoor temperature or by measuring titanium dioxide
Concentration of carbon and the gas concentration lwevel sensor for reacting indoor air quality.
In above inventive concept, primary air fan is set on supply air system main, meanwhile, set respectively in each end branch
Overfire air fan is put, blowpipe air output is controlled using overfire air fan substitution air-valve, so as to accurately meet each room
Between real-time change air output demand.Accurately meeting the same of the real-time variable air rate demand in each room and thermal comfort demand
When, realize the energy-efficient operation of whole distributing system.Terminally positioned overfire air fan is sent instead of air-valve balanced draft branch pipe
Air quantity, compared with the control mode of air output is reduced conventionally by air-valve, does not increase supply air system resistance, it is to avoid blower fan choosing
Type is excessive.VAV control is realized using frequency conversion fan, the air output of supply air system at low load is reduced.Point of the present invention
Cloth variable air rate supply air system had both reduced the air output of supply air system, and the overbottom pressure of blower fan offer is reduced again, can be dropped significantly
Low fan energy consumption, realizes the energy-efficient operation of supply air system.
Overfire air fan is set respectively in each end branch, blowpipe air output entered using overfire air fan substitution air-valve
The air-valve set in row control, end branch, only carries out start-up and shut-down control, and the function of air quantity regulation is not undertaken.Two in end branch
Secondary blower fan directly overcomes the resistance of branch road, it is not necessary to consider influence of the difference to primary air fan of blowpipe resistance, it is to avoid
Air output deviation, reduces the workload of designer and system debug personnel, enhances variable air rate caused by waterpower is uneven
The accuracy of control, can accurately meet the real-time variable air rate demand in each room and thermal comfort demand.
Static pressure transducer is set in air-supply main end, temperature sensor (or two is set respectively in each air-conditioned room room
Carbonoxide concentration sensor), the pressure signal monitored by static pressure transducer controls the converting operation of primary air fan, passes through interior
Temperature (or gas concentration lwevel) signal control overfire air fan of temperature sensor (or gas concentration lwevel sensor) feedback
The control of primary air fan and overfire air fan, be kept completely separate by converting operation so as to realize, it is to avoid primary air fan and overfire air fan
The problems such as difficult coordination.
It is another aspect of this invention to provide that there is provided a kind of control of air-conditioned room variable air rate supply air system as described above
Method, during work, first, main power supply air switch is opened in main control cabinet, main air valve control module output control signal, control
The main actuator of main Electric air valve processed opens air-supply main Electric air valve, and primary air fan receives the control of main air blower control module output
Signal processed, delay setting duration starts,
Then, branch pipe power supply air switch in end-of-pipe control cabinet, end air-valve control module output control signal, control are opened
Electric air valve end effector processed opens blowpipe Electric air valve, and overfire air fan receives the control of tail-end blower fan control module output
Signal processed, delay setting duration starts, and so far, distributed variable air rate supply air system is all turned on and normal work.
Further, when temperature is higher than setting value higher than setting value or indoor carbon dioxide concentration indoors, tail-end blower fan
Control module exports frequency variation signal, and control tail-end blower fan frequency converter improves the running frequency of overfire air fan, increases corresponding end
Air output on the blowpipe of air-conditioned room, to reduce indoor temperature to setting value or lifting indoor air quality；Indoors
When temperature is less than setting value less than setting value or gas concentration lwevel, tail-end blower fan control module output frequency variation signal, control end
Hold fan frequency converter to reduce the running frequency of overfire air fan, reduce the air-supply on the blowpipe in corresponding tail end air conditioner room
Amount, so as to realize reduction overfire air fan energy consumption, maintain indoor temperature constant and ensure indoor air quality.
Further, while overfire air fan running frequency is adjusted, fed back according to the static pressure transducer of main end
Pressure signal carries out VFC to primary air fan.Specifically, when the pressure signal that static pressure transducer feeds back is less than setting value,
Main air blower control module exports frequency variation signal to main air blower frequency converter, to improve the operation of primary air fan by main air blower frequency converter
Frequency, the blast of increase main end；When the pressure signal that static pressure transducer feeds back is higher than setting value, main air blower control module
Frequency variation signal is exported to main air blower frequency converter, to reduce the running frequency of primary air fan by main air blower frequency converter, main is reduced
The blast of end.
Further, when primary air fan running frequency is down to setting value and maintain setting duration after, main air blower control mould
Block output control signal, to stop the operation of primary air fan, meanwhile, main air valve control module output control signal, to pass through electricity
The dynamic main actuator of air-valve closes air-supply main Electric air valve.
Further, after overfire air fan running frequency is down to setting value and maintains setting duration, tail-end blower fan control mould
Block output control signal, to stop the operation of overfire air fan, meanwhile, end air-valve control module output control signal, to pass through
Electric air valve end effector closes blowpipe Electric air valve.
In above inventive concept, fan frequency conversion operation does not increase the local resistance of supply air system, reduces the energy of blower fan
Consumption.Its direct air output according to corresponding to indoor temperature or gas concentration lwevel control on blowpipe, overfire air fan is direct
Overcome the resistance of branch road, it is to avoid air output deviation caused by waterpower is uneven, can accurately meet each room and become in real time
Air quantity demand, it is ensured that thermal comfort and the air quality requirement in each room.Fan frequency conversion regulation action is more dynamic than air-valve regulation
Make fast, be swift in response, improve control effect.It is controlled to primary air fan with overfire air fan simultaneously, maintains air-conditioned room
Indoor temperature it is constant, it is ensured that indoor air quality.Blower fan and air-valve coordinated signals, it is to avoid air output is wasted, lower blower fan by
The risk of infringement.
In general, obtain following beneficial compared with prior art, enough by the contemplated above technical scheme of the present invention
Effect：
The present invention proposes a kind of distributed variable air rate supply air system and its control method, and one is set on supply air system main
Secondary blower fan, meanwhile, overfire air fan is set respectively in each end branch, replaces air-valve to blow blowpipe using overfire air fan
Amount is controlled, while the real-time variable air rate demand in each room and thermal comfort demand is accurately met, and is realized whole
The energy-efficient operation of distributing system.
Compared with the control mode of air output is reduced conventionally by air-valve, distributed variable air rate supply air system of the invention is led to
The size of double conversion Fan Regulation end air output is crossed, do not increase supply air system resistance, it is to avoid Fan Selection is excessive.This hair
Bright distributed variable air rate supply air system had both reduced the air output of supply air system, and the overbottom pressure of blower fan offer is reduced again, can be with
Fan energy consumption is substantially reduced, the power consumption of distributing system is reduced, with significant economic benefit and social benefit.
In addition, overfire air fan directly overcomes the resistance of branch road in end branch, the variable air rate regulation in each room is realized.Sending
When wind system is designed, it is not necessary to consider influence of the difference to primary air fan of blowpipe resistance, it is to avoid waterpower imbalance is led
The air output deviation of cause, reduces the workload of designer and system debug personnel, enhances the accuracy of VAV control,
The real-time variable air rate demand in each room and thermal comfort demand can accurately be met.
The distributed variable air rate supply air system and control method of the present invention can ensure that the real-time variable air rate in each room is needed
Summation thermal comfort demand, while the operation energy consumption of air-conditioner tail end equipment can be effectively reduced.
The present invention distributed variable air rate supply air system it is simple in construction, easy to implement, air-conditioning can be effectively reduced
System operation energy consumption.
Brief description of the drawings
Fig. 1 is distributed variable air rate supply air system schematic diagram in the embodiment of the present invention.
In all of the figs, identical reference is used for representing identical element or structure, wherein：
1- primary air fans 2- air-supply main Electric air valves
3- blowpipe Electric air valve 4- overfire air fans
5- main control cabinet 6- main power supply air switches
7- main air blower control module 8- main air valve control modules
The main actuator of 9- main air blower frequency converter 10- Electric air valves
11- end-of-pipe control cabinet 12- branch pipe power supply air switches
13- tail-end blower fan control module 14- ends air-valve control module
15- tail-end blower fan frequency converter 16- Electric air valve end effectors
17- environmental feedback device 18- static pressure transducers
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in each embodiment of invention described below
Not constituting conflict each other can just be mutually combined.
Fig. 1 is distributed variable air rate supply air system schematic diagram in the embodiment of the present invention, as shown in figure 1, of the present invention one
Planting distributed variable air rate supply air system includes primary air fan 1, main Electric air valve 2 of blowing, and blowpipe Electric air valve 3 is secondary
Blower fan 4, main control cabinet 5, end-of-pipe control cabinet 11, (environmental feedback device can be the temperature of direct measurement indoor temperature to environmental feedback device
Spend sensor or the gas concentration lwevel sensor by measuring gas concentration lwevel and indirect feedback temperature) 17, static pressure sensing
Device 18.
Wherein, main control cabinet 5 include main power supply air switch 6, main air blower control module 7, main air valve control module 8,
Main air blower frequency converter 9 and the main actuator 10 of Electric air valve.End-of-pipe control cabinet 11 includes branch pipe power supply air switch 12, end wind
Machine control module 13, end air-valve control module 14, tail-end blower fan frequency converter 15 and Electric air valve end effector 16.
In main control cabinet 5, static pressure transducer 18 is electrically connected with main control cabinet 5, by pressure signal transmission to main control cabinet 5
Middle main air blower control module 7, main air valve control module 8.Primary air fan 1, main Electric air valve 2 are electrically connected with main control cabinet 5.It is main
Fan frequency converter 9 receives the control signal of the output of main air blower control module 7, controls the frequency conversion of primary air fan 1.Main air valve controls mould
Block 8 controls the switch of main Electric air valve 2 by the main actuator 10 of Electric air valve.Main power supply air switch 6 controls main control
The on/off of each part in cabinet 5.
In end-of-pipe control cabinet 11, environmental feedback device (or gas concentration lwevel sensor) 17 is electrically connected with end-of-pipe control cabinet 11
Connect, temperature (or gas concentration lwevel) signal is passed into tail-end blower fan control module 13 in end-of-pipe control cabinet 11, end air-valve
Control module 14.Overfire air fan 4, branch pipe Electric air valve 3 are electrically connected with end-of-pipe control cabinet 11.Tail-end blower fan frequency converter 15 receives end
The control signal for holding fan control module 13 to export, controls the frequency conversion of overfire air fan 4.End air-valve control module 14 is by electronic
The switch of the control branch pipe of air-valve end effector 16 Electric air valve 3.The control end-of-pipe control cabinet 11 of branch pipe power supply air switch 12 is each
The on/off of part.
The control method of the distributed variable air rate supply air system of the present invention is as follows：
When the first, working, main power supply air switch 6 is opened in main control cabinet 5, the output control of main air valve control module 8 letter
Number air-supply main Electric air valve 2 is opened by the main actuator 10 of main Electric air valve, primary air fan 1 receives main air blower control module
Postpone for example to start within 1 minute after the control signal of 7 outputs,
Branch pipe power supply air switch 12 in end-of-pipe control cabinet 11 is opened, the output control signal of end air-valve control module 14 is led to
Cross Electric air valve end effector 16 and open blowpipe Electric air valve 3, it is defeated that overfire air fan 4 receives tail-end blower fan control module 13
Postpone for example to start within 1 minute after the control signal gone out, so far, distributed variable air rate supply air system is all turned on and normal work.
2nd, tail end air conditioner room indoor temperature gives setting value (such as 27 DEG C), or given gas concentration lwevel setting value
(700PPM)。
Tail-end blower fan control module 13 receive indoor environment ultramagnifier (or gas concentration lwevel sensor) 17 temperature (or
Gas concentration lwevel) signal, and output control signal controls the running frequency of overfire air fan 4 by tail-end blower fan frequency converter 15.
When indoor temperature be higher than setting value (such as 27 DEG C) when, or gas concentration lwevel be higher than setting value (700PPM) when,
Tail-end blower fan control module 13 exports frequency variation signal and improves the running frequency of overfire air fan 4 (such as by tail-end blower fan frequency converter 15
50Hz is risen to from 45Hz), increase the air output on pipe on the blowpipe corresponding to the room, reduction indoor temperature to setting
Value, it is ensured that indoor air quality.
When indoor temperature be less than setting value (such as 27 DEG C) when, or gas concentration lwevel be less than setting value (700PPM) when,
Then the output frequency variation signal of tail-end blower fan control module 13 reduces the running frequency of overfire air fan 4 by tail-end blower fan frequency converter 15
(being such as down to 45Hz from 50Hz), reduces the air output on blowpipe corresponding to the room, reduces overfire air fan energy consumption, maintains room
Interior temperature is constant, it is ensured that indoor air quality.
3rd, when distributed variable air rate of the invention send subsystem normal work, in the same of the regulation running frequency of overfire air fan 4
When, the pressure signal fed back according to the static pressure transducer 18 of main end carries out VFC to primary air fan 1.
The pressure signal that static pressure transducer 18 feeds back maintains a certain setting value (such as 0Pa), and main air blower control module 7 connects
By main end static pressure transducer 18 pressure signal and compared with setting value, believed according to the size result output control that compares
Number, to control main air blower frequency converter 9 to adjust the running frequency of primary air fan 1.
When the pressure signal that static pressure transducer 18 feeds back is less than a certain setting value (such as 0Pa), main air blower control module 7 is defeated
Go out frequency variation signal, to improve the running frequency (such as rising to 50Hz from 45Hz) of primary air fan 1, increase by main air blower frequency converter 9
The static pressure of main end.
When the pressure signal that static pressure transducer 18 feeds back is higher than setting value (such as 0Pa), then main air blower control module 7 is defeated
Go out frequency variation signal, to reduce the running frequency (being such as down to 45Hz from 50Hz) of primary air fan 1 by main air blower frequency converter 9, reduce
The static pressure of main end.
4th, when the running frequency of primary air fan 1 is down to certain setting value (such as 15Hz) and maintain a period of time (such as 10 points
Clock), the output control signal of main air blower control module 7 stops the operation of primary air fan 1, the output control of main air valve control module 8 letter
Number passing through the main actuator 10 of Electric air valve closes air-supply main Electric air valve 2.
5th, when the running frequency of overfire air fan 4 is down to certain setting value (such as 15Hz) and maintain a period of time (such as 10 points
Clock), the output control signal of tail-end blower fan control module 13, to stop the operation of overfire air fan 4, end air-valve control module 14 is defeated
Go out control signal to close blowpipe Electric air valve 3 by Electric air valve end effector 16.
The distributed variable air rate of the present invention send the characteristics of subsystem specifically has following：
1st, compared to traditional air-conditioning system, VAV control is realized using frequency conversion fan, supply air system is reduced
Air output at low load, reduces supply air system conveying energy consumption.
2nd, compared to traditional variable air rate supply air system, in the control aspect to each air-conditioned room air output, one kind distribution
Formula variable air rate supply air system make use of overfire air fan to replace air-valve, the air output of blowpipe is adjusted, in end branch
Overfire air fan directly overcomes the resistance of branch road, become passive throttling actively to blow, it is to avoid Fan Selection is excessive, further reduces
Supply air system conveying energy consumption.
3rd, overfire air fan directly overcomes the resistance of branch road in end branch, in air-conditioning system design, it is not necessary to examine
Consider influence of the difference to primary air fan of blowpipe resistance, it is to avoid air output deviation caused by waterpower is uneven, reduce
Designer and the workload of system debug personnel, enhance the accuracy of VAV control, can accurately meet each room
Real-time variable air rate demand and thermal comfort demand.
4th, static pressure transducer is set in air-supply main end, set respectively in each air-conditioned room room environmental feedback device (or
Gas concentration lwevel sensor), the pressure signal monitored by static pressure transducer controls the converting operation of primary air fan, passes through room
Temperature (or gas concentration lwevel) signal control overfire air fan of interior environment ultramagnifier (or gas concentration lwevel sensor) feedback
Converting operation, the control of primary air fan and overfire air fan is kept completely separate so as to realize, it is to avoid primary air fan and Secondary Air
The problems such as machine difficult coordination.
5th, fan frequency conversion is run, and is not increased the local resistance of supply air system, is reduced the energy consumption of blower fan.
6th, the air output directly according to corresponding to being controlled indoor temperature on blowpipe, overfire air fan directly overcomes branch road
Resistance, it is to avoid air output deviation caused by waterpower is uneven, can accurately meet the real-time variable air rate demand in each room, protect
The thermal comfort requirement in each room is demonstrate,proved.
7th, the action of Water fan variable frequency adjustment is faster than the action that air-valve is adjusted, and response quickly improves control effect.
8th, while being controlled to primary air fan and overfire air fan, the constant of air-conditioned room indoor temperature is maintained, it is ensured that room
Interior air quality；Blower fan and air-valve coordinated signals, it is to avoid air output is wasted, lower the injured risk of blower fan.
In the present invention, while carrying out VFC to primary air fan 1 and overfire air fan 4, the Indoor Temperature of air-conditioned room is maintained
Degree is constant, improves the control effect of device, so as to ensure the operation normally and efficiently of whole distributed variable air rate supply air system.
VAV control is realized using frequency conversion fan, the air output of supply air system at low load is reduced.In inventive concept above,
On the one hand it can be very good to control the constant of tail end air conditioner indoor temperature, the heat that room is improved while room load is undertaken is relaxed
Adaptive.On the other hand start and stop, VFC are carried out to blower fan, it is to avoid unnecessary energy dissipation, realizes the efficient section of device
Can operation.
In the present invention, terminally positioned overfire air fan replaces air-valve balanced draft branch pipe air output, becomes based on passive throttling
Dynamic air-supply, do not increase supply air system resistance, it is to avoid unnecessary energy dissipation.The pressure signal monitored by static pressure transducer
The converting operation of control primary air fan, the temperature fed back by indoor environment ultramagnifier (or gas concentration lwevel sensor) (or
Gas concentration lwevel) signal control overfire air fan converting operation, so as to realize the control of primary air fan and overfire air fan is complete
It is fully separating, it is to avoid the problems such as primary air fan and overfire air fan difficult coordination.
When supply air system is designed, distributed variable air rate of the invention send subsystem without the concern for blowpipe resistance
Influence of the difference to primary air fan, it is to avoid air output deviation caused by waterpower is uneven, reduces designer and system is adjusted
The workload of examination personnel, enhances the accuracy of VAV control.In addition, blower fan and air-valve coordinated signals, it is to avoid air output wave
Take, lower the injured risk of blower fan.
A kind of distributed variable air rate supply air system of the present invention, in the case where not increasing supply air system resistance, leads to
The converting operation of control primary air fan and overfire air fan is crossed, so that accurately meeting the air output of each room real-time change needs
Ask.On the one hand, VAV control is realized using frequency conversion fan, reduces the air output of supply air system at low load；The opposing party
Face, terminally positioned overfire air fan replaces air-valve balanced draft branch pipe air output.
Compared with the control mode of air output is adjusted conventionally by air-valve, distributed variable air rate supply air system of the invention is led to
The size of double conversion Fan Regulation end air output is crossed, becomes passive throttling and is blown into active, do not increase supply air system resistance, keep away
Fan Selection is exempted from excessive.Fan energy consumption can be thus substantially reduced, the power consumption of distributing system is reduced, with significant economic effect
Benefit and social benefit.Meanwhile, overfire air fan directly overcomes the resistance of branch road in end branch, realizes that the variable air rate in each room is adjusted
Section.When supply air system is designed, the difference pair of distributed variable air rate supply air system of the invention without the concern for blowpipe resistance
The influence of primary air fan, it is to avoid air output deviation caused by waterpower is uneven, can reduce designer and system debug personnel
Workload, strengthen VAV control accuracy, can accurately meet the real-time variable air rate demand in each room and thermal comfort
Property demand.
Distribution variable air rate supply air system of the invention can accurately meet the air output demand of each room real-time change,
Ensure the thermal comfort of air-conditioned room.
Supply air system and its control method of the present invention can be in subway station air-conditioning, ventilating system, large-scale public construction air-conditioning, ventilations
Promoted, used for reference and applied in system design, with significant Social benefit and economic benefit.
In the present invention, each air-conditioned room namely tail end air conditioner room.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, it is not used to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the invention etc., it all should include
Within protection scope of the present invention.
Claims (10)
1. a kind of distributed variable air rate supply air system, it includes air-supply main and the multiple blowpipes connected with air-supply main,
Each blowpipe connects different air-conditioned rooms, it is characterised in that
It also includes primary air fan (1), main Electric air valve (2) of blowing, blowpipe Electric air valve (3), overfire air fan (4),
Main control cabinet (5), end-of-pipe control cabinet (11), environmental feedback device (17) and static pressure transducer (18),
Wherein, primary air fan (1) is arranged on air-supply main port, and air-supply main Electric air valve (2) is arranged on air-supply main,
And it is located at primary air fan (1) air outlet downstream and blowpipe air inlet upstream simultaneously, air-supply main Electric air valve (2) is used to lead to
Overregulate the opening and closing of itself valve port and control air quantity in air-supply main,
Blowpipe Electric air valve (3) is arranged on blowpipe port, and overfire air fan (4) is arranged on blowpipe and is located at
The wind direction downstream of blowpipe Electric air valve (3),
Environmental feedback device (17) is set in each air-conditioned room, temperature or air quality for reacting each air-conditioned room,
Static pressure transducer (18) is arranged on air-supply main line end, for measuring the blast size in air-supply main,
Main control cabinet (5) with primary air fan (1), air-supply main Electric air valve (2) and static pressure transducer (18) while be mutually electrically connected
Connect, for the operating frequency of blast size regulation primary air fan (1) in the air-supply main that is fed back according to static pressure transducer (18), also
Air-supply main Electric air valve is opened and closed for the operating frequency according to primary air fan (1),
End-of-pipe control cabinet (11) with overfire air fan (4), blowpipe Electric air valve (3) and environmental feedback device (17) while be mutually electrically connected
Connect, for temperature in the air-conditioned room that is fed back according to environmental feedback device (17) or the fortune of air quality regulation overfire air fan (4)
Turn frequency and start and stop blowpipe Electric air valve (3).
2. a kind of distributed variable air rate supply air system as claimed in claim 1, it is characterised in that main control cabinet (5) includes dry
Pipe power supply air switch (6), main air blower control module (7), main air valve control module (8), main air blower frequency converter (9) and electronic
The main actuator of air-valve (10), wherein,
Main power supply air switch (6) is used for the on/off for controlling electrical equipment in whole main control cabinet (5),
Main air blower control module (7) with static pressure transducer (18), main air blower frequency converter (9) while be mutually electrically connected, fan frequency converter
(9) it is electrically connected with primary air fan (1), the air-supply that main air blower control module (7) is used to be fed back according to static pressure transducer (18) is done
Blast size sends frequency variation signal in pipe, and the frequency variation signal is transmitted to main air blower frequency converter (9), so as to adjust primary air fan
(1) operating frequency,
Main air valve control module (8) with static pressure transducer (18), the main actuator of Electric air valve (10) while be mutually electrically connected, electronic wind
The main actuator of valve (10) with air-supply main Electric air valve (2) while be also mutually electrically connected, and main air valve control module (8) is used for according to quiet
Blast size sends air-valve control signal in the air-supply main of pressure sensor (18) feedback, and by the air-valve control signal transmit to
The main actuator of Electric air valve (10), so that start and stop air-supply main Electric air valve (2).
3. a kind of distributed variable air rate supply air system as claimed in claim 1 or 2, it is characterised in that end-of-pipe control cabinet (11)
Including branch pipe power supply air switch (12), tail-end blower fan control module (13), end air-valve control module (14), tail-end blower fan becomes
Frequency device (15) and Electric air valve end effector (16),
Wherein, branch pipe power supply air switch (12) is used for the on/off for controlling electrical equipment in whole end-of-pipe control cabinet (11),
Tail-end blower fan control module (13) with environmental feedback device (17), tail-end blower fan frequency converter (15) while be mutually electrically connected, end
Fan frequency converter (15) is electrically connected with overfire air fan (4), and tail-end blower fan control module (13) is used for according to environmental feedback device
(17) actual temperature or air quality of the air-conditioned room of feedback send frequency variation signal, and the frequency variation signal is transmitted to end
Fan frequency converter (15), so that the operating frequency of overfire air fan (4) is adjusted,
End air-valve control module (14) while be mutually electrically connected with environmental feedback device (17), Electric air valve end effector (16),
Electric air valve end effector (16) with blowpipe Electric air valve (3) while be also mutually electrically connected, end air-valve control module
(14) indoor temperature or air quality for being used to be fed back according to environmental feedback device (17) send air-valve control signal, and by the wind
Valve control signal is transmitted to Electric air valve end effector (16), so as to control the opening and closing of blowpipe Electric air valve (3).
4. a kind of distributed variable air rate supply air system as claimed in claim 3, it is characterised in that the environmental feedback device (17)
Temperature sensor for direct measurement indoor temperature or the dioxy that indoor air quality is reacted by measuring gas concentration lwevel
Change concentration of carbon sensor.
5. the control method of variable air rate supply air system as claimed in claim 4, it is characterised in that
During work, first, main power supply air switch (6) is opened in main control cabinet (5), main air valve control module (8) output control
Signal processed, the control main actuator of main Electric air valve (10) opens air-supply main Electric air valve (2), and primary air fan (1) receives master
The control signal of fan control module (7) output, delay setting duration starts,
Then, branch pipe power supply air switch (12) in end-of-pipe control cabinet (11), end air-valve control module (14) output control are opened
Signal processed, control Electric air valve end effector (16) opens blowpipe Electric air valve (3), and overfire air fan (4) receives end
The control signal of fan control module (13) output, delay setting duration starts, and so far, distributed variable air rate supply air system is whole
Open and normal work.
6. the control method of variable air rate supply air system as claimed in claim 5, it is characterised in that
When temperature is higher than setting value higher than setting value or indoor carbon dioxide concentration indoors, tail-end blower fan control module (13) is defeated
Go out frequency variation signal, control tail-end blower fan frequency converter (15) improves the running frequency of overfire air fan (4), increases corresponding tail end air conditioner
Air output on the blowpipe in room, to reduce indoor temperature to setting value or lifting indoor air quality,
When temperature is less than setting value less than setting value or gas concentration lwevel indoors, tail-end blower fan control module (13) output becomes
Frequency signal, the running frequency of control tail-end blower fan frequency converter (15) reduction overfire air fan (4) reduces corresponding tail end air conditioner room
Blowpipe on air output, so as to realize reduction overfire air fan energy consumption, maintain indoor temperature constant and ensure Interior Space
Gas quality.
7. the control method of variable air rate supply air system as claimed in claim 5, it is characterised in that in regulation overfire air fan (4)
While running frequency, primary air fan (1) is become according to the pressure signal that the static pressure transducer (18) of main end feeds back
Frequency is controlled.
8. the control method of variable air rate supply air system as claimed in claim 7, it is characterised in that
When the pressure signal that static pressure transducer (18) feeds back is less than setting value, main air blower control module (7) output frequency variation signal
To main air blower frequency converter (9), to improve the running frequency of primary air fan (1), increase main end by main air blower frequency converter (9)
Blast,
When the pressure signal that static pressure transducer (18) feeds back is higher than setting value, main air blower control module (7) output frequency variation signal
To main air blower frequency converter (9), to reduce the running frequency of primary air fan (1) by main air blower frequency converter (9), main end is reduced
Blast.
9. the control method of the variable air rate supply air system as described in claim (5), it is characterised in that
When primary air fan (1) running frequency is down to setting value and maintain setting duration after, the output control of main air blower control module 7
Signal, to stop the operation of primary air fan (1),
Meanwhile, main air valve control module (8) output control signal, to close air-supply main by the main actuator of Electric air valve (10)
Electric air valve (2).
10. the control method of variable air rate supply air system as claimed in claim 5, it is characterised in that
After overfire air fan (4) running frequency is down to setting value and maintains setting duration, tail-end blower fan control module (13) output
Control signal, to stop the operation of overfire air fan (4),
Meanwhile, end air-valve control module (14) output control signal is sent with being closed by Electric air valve end effector (16)
Wind branch pipe Electric air valve (3).
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| CN107940560A (en) * | 2017-11-14 | 2018-04-20 | 苏州庆瑞空气系统有限公司 | Air-conditioning internal machine with liftable outlet pipe |
| CN109612030A (en) * | 2018-11-08 | 2019-04-12 | 广州地铁设计研究院股份有限公司 | A kind of full frequency conversion energy-saving control method of central air-conditioning |
| CN110388728A (en) * | 2018-04-19 | 2019-10-29 | 天津健智者行空调技术有限公司 | A kind of automatic control device of central air-conditioning |
| CN110440418A (en) * | 2019-08-12 | 2019-11-12 | 珠海格力电器股份有限公司 | Central ventilation system capable of being adjusted according to requirements and air volume control method thereof |
| CN111256338A (en) * | 2020-01-19 | 2020-06-09 | 深圳市奥宇节能技术股份有限公司 | Control method for air supply fan of variable air volume air conditioning system |
| CN111295074A (en) * | 2018-12-06 | 2020-06-16 | 大连国霖技术有限公司 | Intelligent air distribution group control energy-saving device for data center machine room |
| CN112628946A (en) * | 2020-12-11 | 2021-04-09 | 北京康宅建筑科技有限公司 | Fresh air energy-saving control system and control method thereof |
| CN113465100A (en) * | 2021-05-19 | 2021-10-01 | 万泰（苏州）环境科技有限公司 | Ventilation air volume distribution method, control device and ventilation device |
| CN113695345A (en) * | 2021-08-30 | 2021-11-26 | 亿普特集团有限公司 | Ventilation cabinet exhaust control system |
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| CN112628946A (en) * | 2020-12-11 | 2021-04-09 | 北京康宅建筑科技有限公司 | Fresh air energy-saving control system and control method thereof |
| CN113465100A (en) * | 2021-05-19 | 2021-10-01 | 万泰（苏州）环境科技有限公司 | Ventilation air volume distribution method, control device and ventilation device |
| CN113695345A (en) * | 2021-08-30 | 2021-11-26 | 亿普特集团有限公司 | Ventilation cabinet exhaust control system |
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Application publication date: 20170818 |