CN207350688U - A kind of distribution variable air rate supply air system - Google Patents
A kind of distribution variable air rate supply air system Download PDFInfo
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- CN207350688U CN207350688U CN201720774547.6U CN201720774547U CN207350688U CN 207350688 U CN207350688 U CN 207350688U CN 201720774547 U CN201720774547 U CN 201720774547U CN 207350688 U CN207350688 U CN 207350688U
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- 230000008054 signal transmission Effects 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
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- 241000790917 Dioxys <bee> Species 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 8
- 238000005265 energy consumption Methods 0.000 description 15
- 238000004378 air conditioning Methods 0.000 description 13
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- 230000008901 benefit Effects 0.000 description 7
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 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
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 239000004408 titanium dioxide Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a kind of distributed variable air rate supply air system, system is included once, overfire air fan, air-supply main pipe 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 at air-supply main pipe port, air-supply main pipe Electric air valve is arranged on air-supply main pipe, blowpipe Electric air valve is arranged at blowpipe port, overfire air fan is arranged on blowpipe, environmental feedback device sets each room, static pressure transducer is arranged on air-supply main pipe line end, main control cabinet at the same time and primary air fan, air-supply main pipe 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 at the same time.The utility model apparatus 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 utility model belongs to building energy conservation and air conditioner ventilation control field, and in particular to a kind of distribution variable air rate air-supply
System.
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.Since air conditioning energy consumption accounts for whole building energy consumption more than 60%, air conditioner energy saving, which seems, to become more and more important.
According to relevant statistics, the time of air-conditioning equipment 97% operates in 70% load fluctuation up and down, therefore using change
Air quantity air-conditioning can reduce air-conditioning energy consumption, achieve the purpose that 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 cannot 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 by adjusting the size of air hose, and control is respectively
Waterpower unbalance factor between branch is within 15%, however, this mode still cannot eliminate the waterpower of each blowpipe not
Balance, before running, it is also necessary to which system debug personnel carry out repeatedly supply air system by adjusting the open degree of air-valve
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, can not 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 avoid, the thermal comfort that have impact on air-conditioning system of high degree.
Therefore, it is necessary 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 can realize the energy-efficient operation of whole distributing system.
Utility model content
For the disadvantages described above or Improvement requirement of the prior art, the utility model provides a kind of distributed variable air rate air-supply
System, it is intended that while the real-time variable air rate demand in each room and thermal comfort demand is accurately met, is realized
The energy-efficient operation of whole distributing system.
To achieve the above object, according to the one side of the utility model, there is provided a kind of distribution variable air rate air-supply system
System, it includes air-supply main pipe and the multiple blowpipes connected with air-supply main pipe, and each blowpipe connects different air-conditioned rooms
Between, it further includes primary air fan, main pipe Electric air valve of blowing, blowpipe Electric air valve, overfire air fan, main control cabinet, end
Switch board, environmental feedback device and static pressure transducer, wherein, primary air fan is arranged at air-supply main pipe port, air-supply main pipe electricity
Dynamic air-valve is arranged on air-supply main pipe, and is located at primary air fan air outlet downstream and blowpipe air inlet upstream at the same time, is blown
Main pipe Electric air valve is used to control air quantity in main pipe of blowing by adjusting the opening and closing of itself valve port, and blowpipe Electric air valve is set
At blowpipe port, overfire air fan is arranged on blowpipe and positioned at the wind direction downstream of blowpipe Electric air valve, ring
Border ultramagnifier is set in each air-conditioned room, for reacting the temperature or air quality of each air-conditioned room, static pressure transducer
Be arranged on air-supply main pipe line end, for measure blow main pipe in wind pressure size, main control cabinet at the same time with primary air fan, give
Pipe Electric air valve and static pressure transducer is air-dried to be electrically connected, it is big for wind pressure in the air-supply main pipe that is fed back according to static pressure transducer
The operating frequency of minor adjustment primary air fan, is additionally operable to be opened and closed air-supply main pipe Electric air valve according to the operating frequency of primary air fan,
End-of-pipe control cabinet is electrically connected with overfire air fan, blowpipe Electric air valve and environmental feedback device at the same time, for anti-according to environment
The operating frequency and start and stop blowpipe for presenting temperature or air quality adjusting overfire air fan in the air-conditioned room of device feedback are electronic
Air-valve.
Further, main control cabinet includes main pipe 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 pipe power supply air switch is used to control in whole main control cabinet
The on/off of electrical equipment, main air blower control module are mutually electrically connected with static pressure transducer, main air blower frequency converter at the same time, and wind turbine becomes
Frequency device is electrically connected with primary air fan, and it is big that main air blower control module is used for wind pressure in the air-supply main pipe according to static pressure transducer feedback
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 at the same time, and Electric air valve master holds
Row device is also mutually electrically connected with air-supply main pipe Electric air valve at the same time, and main air valve control module is used to be sent according to what static pressure transducer was fed back
Air-dry wind pressure size in pipe and send air-valve control signal, and by the air-valve control signal transmission to the main actuator of Electric air valve, from
And start and stop air-supply main pipe 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 at the same time, 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 at the same time, Electric air valve
End effector is also mutually electrically connected with blowpipe Electric air valve at the same time, 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 transmission is last to Electric air valve
Actuator is held, so as to control the opening and closing of blowpipe Electric air valve.
Further, the environmental feedback device is for the directly temperature sensor of 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 pipe, 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, avoids wind turbine choosing
Type is excessive.VAV control is realized using frequency conversion fan, reduces the air output of supply air system at low load.The utility model
Distributed variable air rate supply air system not only reduced the air output of supply air system, but also reduce wind turbine offer overbottom pressure, Ke Yi great
It is big to reduce fan energy consumption, realize the energy-efficient operation of supply air system.
Overfire air fan is set respectively in each end branch, using overfire air fan substitute air-valve to blowpipe air output into
Row controls, and the air-valve set in end branch, only carries out start-up and shut-down control, does not undertake the function of air quantity adjusting.Two in end branch
Secondary wind turbine directly overcomes the resistance of branch, it is not necessary to considers influence of the difference to primary air fan of blowpipe resistance, avoids
Air output deviation caused by waterpower imbalance, reduces the workload of designer and system debug personnel, enhances variable air rate
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 pipe end, set temperature sensor (or two is distinguished 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
Converting operation, is kept completely separate so as to fulfill by the control of primary air fan and overfire air fan, avoids primary air fan and overfire air fan
The problems such as difficult coordination.
According to the another aspect of the utility model, there is provided a kind of air-conditioned room variable air rate supply air system as described above
Control method, during work, first, main pipe power supply air switch is opened in main control cabinet, main air valve control module output control letter
Number, the main actuator of control main pipe Electric air valve opens air-supply main pipe Electric air valve, and it is defeated that primary air fan receives main air blower control module
The control signal gone out, delay setting duration start,
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 start, and so far, distributed variable air rate supply air system is all turned on and works normally.
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 fulfill reducing overfire air fan energy consumption, maintaining indoor temperature constant and ensureing indoor air quality.
Further, while overfire air fan running frequency is adjusted, fed back according to the static pressure transducer of main pipe end
Pressure signal carries out frequency control to primary air fan.Specifically, when the pressure signal of static pressure transducer feedback 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 wind pressure of increase main pipe end；When the pressure signal of static pressure transducer feedback 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, reduces main pipe
The wind pressure 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 pipe 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 wind turbine
Consumption.Its air output directly according to corresponding to indoor temperature or gas concentration lwevel control on blowpipe, overfire air fan are direct
Overcome the resistance of branch, air output deviation caused by avoiding waterpower imbalance, can accurately meet that each room becomes in real time
Air quantity demand, ensure that thermal comfort and the air quality requirement in each room.Fan frequency conversion adjusting action adjusts dynamic than air-valve
Make soon, to be swift in response, improve control effect.It is at the same time controlled primary air fan and overfire air fan, maintains air-conditioned room
Constant, the guarantee indoor air quality of indoor temperature.Wind turbine and air-valve coordinated signals, avoid air output from wasting, lower wind turbine by
The risk of infringement.
In general, by the contemplated above technical scheme of the utility model compared with prior art, enough obtain following
Beneficial effect：
The utility model proposes a kind of distributed variable air rate supply air system and its control method, set on supply air system main pipe
Primary air fan is put, meanwhile, overfire air fan is set respectively in each end branch, substitutes air-valve to blowpipe using overfire air fan
Air output is controlled, and while the real-time variable air rate demand in each room and thermal comfort demand is accurately met, is realized
The energy-efficient operation of whole distributing system.
Compared with the control mode of air output is reduced conventionally by air-valve, the distributed variable air rate air-supply system of the utility model
System does not increase supply air system resistance, it is excessive to avoid Fan Selection by the size of double conversion Fan Regulation end air output.
The distributed variable air rate supply air system of the utility model had not only reduced the air output of supply air system, but also reduced the remaining of wind turbine offer
Pressure, can substantially reduce fan energy consumption, reduce the power consumption of distributing system, have significant economic benefit and social benefit.
In addition, overfire air fan directly overcomes the resistance of branch in end branch, realize that the variable air rate in each room is adjusted.Sending
When wind system designs, it is not necessary to consider influence of the difference to primary air fan of blowpipe resistance, avoid waterpower imbalance and lead
The air output deviation of cause, reduces the workload of designer and system debug personnel, enhances the accuracy of VAV control,
It can accurately meet the real-time variable air rate demand in each room and thermal comfort demand.
Distributed the variable air rate supply air system and control method of the utility model can ensure that each room becomes wind in real time
Amount demand and thermal comfort demand, while the operation energy consumption of air-conditioner tail end equipment can be effectively reduced.
The structure of the distributed variable air rate supply air system of the utility model is simple, it is easy to implement, air-conditioning can be effectively reduced
Supply air system operation energy consumption.
Brief description of the drawings
Fig. 1 is distributed variable air rate supply air system schematic diagram in the utility model embodiment.
In all of the figs, identical reference numeral is used for representing identical element or structure, wherein：
1- primary air fans 2- air-supply main pipe Electric air valves
3- blowpipe Electric air valve 4- overfire air fans
5- main control cabinet 6- main pipe 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 of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, is further elaborated the utility model.It should be appreciated that specific embodiment described herein is only explaining
The utility model, is not used to limit the utility model.In addition, institute in each embodiment of the utility model disclosed below
As long as the technical characteristic being related to does not form conflict and is mutually combined each other.
Fig. 1 is distributed variable air rate supply air system schematic diagram in the utility model embodiment, as shown in Figure 1, this practicality is new
A kind of distribution variable air rate supply air system includes primary air fan 1, air-supply main pipe Electric air valve 2, the electronic wind of blowpipe described in type
Valve 3, overfire air fan 4, main control cabinet 5, end-of-pipe control cabinet 11, (environmental feedback device can be in direct measuring chamber to environmental feedback device
The temperature sensor of temperature or by measuring gas concentration lwevel and the gas concentration lwevel sensor of indirect feedback temperature) 17,
Static pressure transducer 18.
Wherein, main control cabinet 5 includes main 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 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 pipe 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 pipe Electric air valve 2 by the main actuator 10 of Electric air valve.Main pipe power supply air switch 6 controls main control
The on/off of each component 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
Air-valve end effector 16 controls the switch of branch pipe Electric air valve 3.Branch pipe power supply air switch 12 controls end-of-pipe control cabinet 11 each
The on/off of component.
The control method of the distributed variable air rate supply air system of the utility model is as follows：
When the first, working, main pipe power supply air switch 6 is opened in main control cabinet 5,8 output control of main air valve control module letter
Number air-supply main pipe Electric air valve 2 is opened by the main actuator 10 of main pipe 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, air-valve control module 14 output control signal in end 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 works normally.
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 is higher than setting value (such as 27 DEG C), or when gas concentration lwevel is higher than setting value (700PPM),
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 in the blowpipe upper tube corresponding to the room, reduce indoor temperature to setting
Value, ensures indoor air quality.
When indoor temperature is less than setting value (such as 27 DEG C), or when gas concentration lwevel is less than setting value (700PPM),
Then tail-end blower fan control module 13, which exports frequency variation signal, 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 constant temperature, ensures indoor air quality.
3rd, when the distributed variable air rate of the utility model send the subsystem to work normally, 4 running frequency of overfire air fan is being adjusted
While, frequency control is carried out to primary air fan 1 according to the pressure signal that the static pressure transducer 18 of main pipe end is fed back.
The pressure signal that static pressure transducer 18 is fed back maintains a certain setting value (such as 0Pa), and main air blower control module 7 connects
By main pipe 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 is fed 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 pipe end.
When the pressure signal that static pressure transducer 18 is fed 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 pipe end.
4th, when 1 running frequency of primary air fan is down to certain setting value (such as 15Hz) and maintain a period of time (such as 10 points
Clock), 7 output control signal of main air blower control module, stops the operation of primary air fan 1,8 output control of main air valve control module letter
Number passing through the main actuator 10 of Electric air valve closes air-supply main pipe Electric air valve 2.
5th, when 4 running frequency of overfire air fan is down to certain setting value (such as 15Hz) and maintain a period of time (such as 10 points
Clock), 13 output control signal of tail-end blower fan control module, 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.
It is as follows that the distributed variable air rate of the utility model send subsystem specifically to have the characteristics that：
1st, compared to traditional air-conditioning system, VAV control is realized using frequency conversion fan, reduces supply air system
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 substitute air-valve, the air output of blowpipe is adjusted, in end branch
Overfire air fan directly overcomes the resistance of branch, becomes passive throttling actively to blow, and it is excessive to avoid Fan Selection, further reduction
Supply air system conveying energy consumption.
3rd, overfire air fan directly overcomes the resistance of branch in end branch, in air-conditioning system design, it is not necessary to examine
Consider influence of the difference of blowpipe resistance to primary air fan, air output deviation, reduces caused by avoiding waterpower imbalance
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 pipe 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, be kept completely separate so as to fulfill by the control of primary air fan and overfire air fan, 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 wind turbine.
6th, the air output directly according to corresponding to controlling indoor temperature on blowpipe, overfire air fan directly overcome branch
Resistance, air output deviation caused by avoiding waterpower imbalance, 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.
8 while primary air fan and overfire air fan are controlled, maintain the constant of air-conditioned room indoor temperature, ensure room
Interior air quality；Wind turbine and air-valve coordinated signals, avoid air output from wasting, and lower the injured risk of wind turbine.
In the utility model, while frequency control is carried out to primary air fan 1 and overfire air fan 4, maintain the room of air-conditioned room
Interior constant temperature, improves the control effect of device, thus ensure whole distributed variable air rate supply air system normally and efficiently
Operation.VAV control is realized using frequency conversion fan, reduces the air output of supply air system at low load.Invention structure above
In think of, the constant of control tail end air conditioner indoor temperature is on the one hand can be very good, room is improved while room load is undertaken
Thermal comfort.On the other hand start and stop, frequency control are carried out to wind turbine, avoids unnecessary energy dissipation, realization device
Energy-efficient operation.
In the utility model, terminally positioned overfire air fan replaces air-valve balanced draft branch pipe air output, becomes passive throttling
Actively to blow, do not increase supply air system resistance, avoid unnecessary energy dissipation.The pressure monitored by static pressure transducer
Signal controls the converting operation of primary air fan, the temperature fed back by indoor environment ultramagnifier (or gas concentration lwevel sensor)
(or gas concentration lwevel) signal controls the converting operation of overfire air fan, so as to fulfill by the control of primary air fan and overfire air fan
The problems such as being kept completely separate, avoiding primary air fan and overfire air fan difficult coordination.
When supply air system designs, the distributed variable air rate of the utility model send subsystem to be hindered without the concern for blowpipe
Influence of the difference of power to primary air fan, air output deviation caused by avoiding waterpower imbalance, reduces designer and is
The workload of system commissioning staff, enhances the accuracy of VAV control.In addition, wind turbine and air-valve coordinated signals, avoid blowing
Amount wastes, and lowers the injured risk of wind turbine.
A kind of distributed variable air rate supply air system described in the utility model, is not increasing the situation of supply air system resistance
Under, by controlling the converting operation of primary air fan and overfire air fan, so as to accurately meet the air-supply of each room real-time change
Amount demand.On the one hand, VAV control is realized using frequency conversion fan, reduces the air output of supply air system at low load；Separately
On the one hand, 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, the distributed variable air rate air-supply system of the utility model
System becomes passive throttling and blows into active, do not increase supply air system resistance by the size of double conversion Fan Regulation end air output
Power, it is excessive to avoid Fan Selection.Fan energy consumption thus can be substantially reduced, reduces the power consumption of distributing system, is had significant
Economic benefit and social benefit.Meanwhile overfire air fan directly overcomes the resistance of branch in end branch, the change in each room is realized
Air quantity is adjusted.When supply air system designs, the distributed variable air rate supply air system of the utility model is hindered without the concern for blowpipe
Influence of the difference of power to primary air fan, air output deviation caused by avoiding waterpower imbalance, can reduce designer and be
The workload of system commissioning staff, strengthens the accuracy of VAV control, can accurately meet the real-time variable air rate need in each room
Summation thermal comfort demand.
The utility model distribution variable air rate supply air system can accurately meet the air output of each room real-time change
Demand, ensures the thermal comfort of air-conditioned room.
The utility model supply air system and its control method can subway station air-conditioning, ventilating system, large-scale public construction air-conditioning,
Promoted, used for reference and applied in Design of Ventilation System, there is significant Social benefit and economic benefit.
In the utility model, each air-conditioned room namely tail end air conditioner room.
As it will be easily appreciated by one skilled in the art that the above is only the preferred embodiment of the utility model only, not
To limit the utility model, any modification for being made where within the spirit and principles of the present invention, equivalent substitution and change
Into etc., it should be included within the scope of protection of this utility model.
Claims (4)
1. a kind of distribution variable air rate supply air system, it includes air-supply main pipe and the multiple blowpipes connected with air-supply main pipe,
Each blowpipe connects different air-conditioned rooms, it is characterised in that
It further includes primary air fan (1), main pipe 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 at air-supply main pipe port, and air-supply main pipe Electric air valve (2) is arranged on air-supply main pipe,
And it is located at primary air fan (1) air outlet downstream and blowpipe air inlet upstream at the same time, air-supply main pipe 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 pipe,
Blowpipe Electric air valve (3) is arranged at 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, for reacting the temperature or air quality of each air-conditioned room,
Static pressure transducer (18) is arranged on air-supply main pipe line end, for measuring the wind pressure size in main pipe of blowing,
Main control cabinet (5) at the same with primary air fan (1), air-supply main pipe Electric air valve (2) and static pressure transducer (18) be mutually electrically connected
Connect, the operating frequency of primary air fan (1) is adjusted for wind pressure size in the air-supply main pipe that is fed back according to static pressure transducer (18), also
Air-supply main pipe Electric air valve is opened and closed for the operating frequency according to primary air fan (1),
End-of-pipe control cabinet (11) while mutually it is electrically connected with overfire air fan (4), blowpipe Electric air valve (3) and environmental feedback device (17)
Connect, the fortune of overfire air fan (4) is adjusted for temperature in the air-conditioned room that is fed back according to environmental feedback device (17) or air quality
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 pipe 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) while mutually it is electrically connected with static pressure transducer (18), main air blower frequency converter (9), fan frequency converter
(9) it is electrically connected with primary air fan (1), main air blower control module (7) is used to be done according to the air-supply that static pressure transducer (18) is fed back
Wind pressure 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) while mutually it is electrically connected with static pressure transducer (18), the main actuator of Electric air valve (10), electronic wind
The main actuator of valve (10) at the same also with air-supply main pipe Electric air valve (2) be mutually electrically connected, main air valve control module (8) be used for according to quiet
Wind pressure size sends air-valve control signal in the air-supply main pipe of pressure sensor (18) feedback, and by the air-valve control signal transmission extremely
The main actuator of Electric air valve (10), so that start and stop air-supply main pipe Electric air valve (2).
3. a kind of distributed variable air rate supply air system as claimed in claim 2, it is characterised in that end-of-pipe control cabinet (11) includes
Branch pipe power supply air switch (12), tail-end blower fan control module (13), end air-valve control module (14), tail-end blower fan frequency converter
(15) and Electric air valve end effector (16), wherein, branch pipe power supply air switch (12) is used to control whole end-of-pipe control
The on/off of electrical equipment in cabinet (11),
Tail-end blower fan control module (13) while mutually it is electrically connected with environmental feedback device (17), tail-end blower fan frequency converter (15), 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 of the air-conditioned room of feedback or air quality 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 mutually it is electrically connected with environmental feedback device (17), Electric air valve end effector (16),
Electric air valve end effector (16) while also mutually it is electrically connected with blowpipe Electric air valve (3), 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).
A kind of 4. distributed variable air rate supply air system as claimed in claim 3, it is characterised in that the environmental feedback device (17)
The dioxy of indoor air quality is reacted for the directly temperature sensor of measurement indoor temperature or by measuring gas concentration lwevel
Change concentration of carbon sensor.
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| CN201720774547.6U CN207350688U (en) | 2017-06-29 | 2017-06-29 | A kind of distribution variable air rate supply air system |
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| CN201720774547.6U CN207350688U (en) | 2017-06-29 | 2017-06-29 | A kind of distribution variable air rate supply air system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107062511A (en) * | 2017-06-29 | 2017-08-18 | 中铁第四勘察设计院集团有限公司 | A kind of distributed variable air rate supply air system and its control method |
| CN111578463A (en) * | 2019-02-18 | 2020-08-25 | 新奥数能科技有限公司 | Method and device for adjusting fresh air valve of variable air volume air conditioning system |
| CN111750508A (en) * | 2020-07-30 | 2020-10-09 | 海润新风（重庆）智能技术有限公司 | Working method of ventilator |
| CN112901234A (en) * | 2019-12-04 | 2021-06-04 | 中核第四研究设计工程有限公司 | Underground tunnel annular ventilation device |
| 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 |
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2017
- 2017-06-29 CN CN201720774547.6U patent/CN207350688U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107062511A (en) * | 2017-06-29 | 2017-08-18 | 中铁第四勘察设计院集团有限公司 | A kind of distributed variable air rate supply air system and its control method |
| CN111578463A (en) * | 2019-02-18 | 2020-08-25 | 新奥数能科技有限公司 | Method and device for adjusting fresh air valve of variable air volume air conditioning system |
| CN112901234A (en) * | 2019-12-04 | 2021-06-04 | 中核第四研究设计工程有限公司 | Underground tunnel annular ventilation device |
| CN111750508A (en) * | 2020-07-30 | 2020-10-09 | 海润新风（重庆）智能技术有限公司 | Working method of ventilator |
| 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 |
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