CN107218654A - The control method and air-conditioning system of air-conditioning system - Google Patents
The control method and air-conditioning system of air-conditioning system Download PDFInfo
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- CN107218654A CN107218654A CN201710414557.3A CN201710414557A CN107218654A CN 107218654 A CN107218654 A CN 107218654A CN 201710414557 A CN201710414557 A CN 201710414557A CN 107218654 A CN107218654 A CN 107218654A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
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Abstract
The present invention relates to a kind of air-conditioning system and its control method, this method includes obtaining the indoor ventilation F1 and return air amount F2 being actually needed；The constant pipeline section D1 of characteristics resistance coefficient is chosen on air delivery duct, F1 is converted into the static pressure difference T1 corresponding to D1；The data of the differential pressure pickup on air delivery duct are obtained, and are compared with T1, to instruct the actual air output of air delivery duct；The constant pipeline section D2 of characteristics resistance coefficient is chosen on exhausting duct is returned, F2 is converted into the static pressure difference T2 corresponding to D2；The data of the differential pressure pickup on exhausting duct are obtained back, and are compared with T2, to instruct back the reality of exhausting duct to return exhaust air rate.The system is correspondingly arranged.The present invention chooses the pipeline section that live pipeline section characteristics resistance coefficient will not change, re-form static pressure difference formula of the systematic air flow in the pipeline section, as the calculation basis of preceding feedback regulation mode below, can fast approaching desired value complete regulation, it is to avoid it is very long compare repeatedly, feed back etc. operate.
Description
Technical field
The present invention relates to technical field of central air, and in particular to a kind of control method of air-conditioning system and a kind of air-conditioning system
System.
Background technology
The application of central air-conditioning under construction is increasingly widespread, thus cause in recent years building energy consumption constantly rise, in prosperity
Countries and regions, building energy consumption accounts for more than the 30% of social total energy consumption, and central air conditioner system is " consuming energy big in building
Family ".The main cause for causing air conditioning energy consumption high is that air-conditioning system does not have reliable control strategy and automatic identification control,
The design of all engineerings is the design method and configuration equipment using full load, is run with meeting system under full load mode
The requirement of required cold (heat) amount and air quantity.However, during actual motion, due to various in climate and public building
The influence of concrete condition change, the system most of the time is all operated under the partial load condition of change.Therefore, it is reliable automatic
Control be air-conditioning system adapt under various partial load conditions still can normally and energy-saving run guarantee.
According to investigation, the automatic control system level of current city track traffic engineering and other public building air-conditioning systems
Difference is larger, and some system ages are more remote, remain in the artificial operational phase, and some can realize main frame and auxiliary substantially
The chain promoter of equipment, but there is no corresponding surveillance and control measure to each equipment operational factor, it is not corresponding during variable parameter operation
Regulating measure.Even if some project air-conditioning systems are mounted with the more perfect related hardware that automatically controls in recent years, but due to control
Improper, control method the not enough or multi-specialized and systematic collaboration operation of system strategy cannot be implemented, final to run or return
Return manually operated, it is impossible to realize operating mode automatic conversion and energy-saving run, indoor environment is also difficult to be guaranteed.The sense of other changes in temperature
Feel is can first to be perceived by people, and transition season and winter outdoor temperature be relatively low, under the smaller state of indoor load, reduction is sent
Air quantity easily causes resh air requirement deficiency, may deteriorate indoor air quality.
Although current urban rail transit in China operation mileage has surpassed 3000 kilometers, the thousands of seats in subway station, air-conditioning end
End does not realize that automatic running manages precedent really also, and manual administration is major way, partly with reference to the automatic data collection set
Warm and humid degrees of data as artificial judgment, can not still realize energy-saving run.
The content of the invention
The present embodiments relate to a kind of control method of air-conditioning system and a kind of air-conditioning system, existing skill can be at least solved
The segmental defect of art.
The present embodiments relate to a kind of control method of air-conditioning system, it is when the operation total blast volume of system requirements is not more than
During the minimal design total blast volume of system, run by the minimal design total blast volume；
When the operation total blast volume of system requirements is more than the minimal design total blast volume of system, methods described includes：
Obtain the indoor ventilation F1 and return air amount F2 being actually needed；
The constant pipeline section D1 of characteristics resistance coefficient is chosen on air delivery duct, the F1 is converted into quiet corresponding to the D1
Pressure difference T1；The pressure difference data between outlet in the pipe of air delivery duct is obtained, and is compared with the T1, to instruct the reality of air delivery duct
Border air output；
The constant pipeline section D2 of characteristics resistance coefficient is chosen on exhausting duct is returned, the F2 is converted into corresponding to the D2
Static pressure difference T2；The pressure difference data between entrance in the pipe of exhausting duct is obtained back, and is compared with the T2, to instruct back air draft
The reality in road returns exhaust air rate.
As one of embodiment, the F1 and the F2 acquisition methods are：The temperature data of air draft is obtained back, with interior
Design temperature is compared, and according to difference is compared, is calculated by energy requirement and is obtained the F1 and the F2.
As one of embodiment, when the operation total blast volume of system requirements is more than the minimal design total blast volume of system, according to
The aperture for the balanced valve that wind pushing temperature data regulation chilled water in air delivery duct is supplied on return pipe, to keep wind pushing temperature constant；
It is cold according to the temperature data regulation for returning air draft when the operation total blast volume of system requirements is not more than the minimal design total blast volume of system
Freeze aperture of the water for the balanced valve on return pipe, to meet indoor load demand.
As one of embodiment, the warm and humid degrees of data of fresh air is obtained, outdoor fresh air enthalpy H1 is calculated and is returned with indoor design
Wind point return air enthalpy H2 is compared, as H1 ＞ H2, after time air draft in described time exhausting duct is at least partly mixed with fresh air
Feeding is indoor；When H1 ＜ H2 and outdoor fresh air temperature are more than system air-supply point temperature, system uses the all-fresh air method of operation, institute
The air draft of returning stated back in exhausting duct is discharged into exhausting duct.
As one of embodiment, the fresh flue includes fresh air supervisor and two fresh air branch pipes, and fresh air branch pipe goes out described in two
Mouth end is equipped with new air-valve and connected with mixed bellows, temperature sensor is provided with the fresh air supervisor, wherein fresh air described in one
New blower fan is provided with branch pipe, described time exhausting duct is connected with air -return duct and exhausting duct, and the air -return duct is provided with air returning valve, described
Exhausting duct is provided with exhaust valve.
It is used as the fresh air on one of embodiment, as H1 ＞ H2, the new fan operation and the corresponding fresh air branch pipe
Valve is opened, and the new air-valve on another fresh air branch pipe is closed, and the exhaust valve is closed, and the air returning valve is opened；As H1 ＜ H2
And outdoor fresh air temperature is blown more than system when putting temperature, new air-valve described in two is opened, and the new blower fan is out of service, described
Exhaust valve is opened, and the air returning valve is closed.
As one of embodiment, the H1 is compared with an indoor design air-supply point air-supply enthalpy H3, as H1 ＜ H3 or
During 15 DEG C of the dry-bulb temperature ＜ of the temperature sensor in fresh air supervisor, new air-valve is opened described in two, the fresh air
Machine is out of service, and the exhaust valve is opened, and the air returning valve is closed, and the air-supply cooling body of the air-conditioning system is out of service.
As one of embodiment, the CO of air draft is obtained back2Concentration data C1, and with indoor design CO2Concentration secure threshold enters
Row compares C0, as C1 ＞ C0, improves total air output of system, is less than to C1 after C0, replys original parameter operation.
The present embodiments relate to a kind of air-conditioning system, including air delivery duct, return on exhausting duct and fresh flue, the air delivery duct
Provided with pressure fan and air-treatment mechanism, described time exhausting duct is provided with back exhaust blower, and the fresh flue enters with the air delivery duct
The connection of mouth end, the air delivery duct and described time exhausting duct are respectively provided with the constant pipeline section of at least one section of characteristics resistance coefficient, described to send
Be equipped with differential pressure pickup and temperature sensor on air channel and described time exhausting duct, each differential pressure pickup have be used for
The first pressure interface of indoor connection and the second pressure interface being connected on corresponding air channel；The air-conditioning system also includes center
The differential pressure pickup and first comparator electricity on controller, first comparator and the second comparator, the air delivery duct
Connection, the differential pressure pickup on described time exhausting duct is electrically connected with second comparator, the first comparator, described
Second comparator, temperature sensor, the pressure fan and described time exhaust blower described in two are electrically connected with the central controller.
As one of embodiment, the air-conditioning system also includes the 3rd comparator；Temperature and humidity sensing is provided with the fresh flue
Device, described time exhausting duct porch is provided with return air enthalpy transmitter, the return air enthalpy transmitter and the 3rd comparator electricity
Connection, the Temperature Humidity Sensor and the 3rd comparator are electrically connected with the central controller.
The embodiment of the present invention at least has the advantages that：The present invention chooses live pipeline section characteristics resistance coefficient and will not sent out
The raw pipeline section changed, and enter database by debugging acquisition True Data, re-form static pressure of the systematic air flow in the pipeline section
Poor formula, as the calculation basis of preceding feedback regulation mode below, can fast approaching desired value complete regulation, it is to avoid it is very long
The operation such as compare, feed back repeatedly.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation for the air-conditioning system that the embodiment of the present invention one is provided；
Fig. 2 is the schematic flow sheet for the air-conditioning system air-blower control that the embodiment of the present invention two is provided；
Fig. 3 is the schematic flow sheet for the air-conditioning system water valve control that the embodiment of the present invention two is provided.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is all other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Embodiment one
Such as Fig. 1, the embodiment of the present invention provides a kind of air-conditioning system, available for city track traffic engineering and other buildings
In, it includes air delivery duct 1, goes back to exhausting duct 2 and fresh flue 3, and the fresh flue 3 is connected with the arrival end of air delivery duct 1, air delivery duct
1 port of export is then located at Indoor environment, returns the arrival end of exhausting duct 2 and is located at Indoor environment, air delivery duct 1 provided with pressure fan 8 and
Air-treatment mechanism, returns exhausting duct 2 and is provided with back exhaust blower 26.Usually, above-mentioned air-treatment mechanism includes mixed bellows 5, mistake
Filter 6 and surface cooler 7, the mixed bellows 5, the filter 6, the surface cooler 7 and the pressure fan 8 are along air circulation direction
Set gradually, the surface cooler 7 is connected with chilled water for water return pipeline 9, and the chilled water is provided with balanced valve for water return pipeline 9
25, usually, the chilled water includes chilled water feed pipe 901 and chilled water return pipe 902, above-mentioned balanced valve for water return pipeline 9
25 on the chilled water return pipe 902；The air-treatment mechanism further comprises silencer 10, and the silencer 10 is located at
Between pressure fan 8 and the port of export of air delivery duct 1.Attachment structure, installation relation of above-mentioned air-treatment mechanism etc. are that this area is normal
Rule technology, those skilled in the art are easy to know according to prior art, and here is omitted.Further, it is described as schemed
Return the port of export of exhausting duct 2 and be connected with air -return duct and exhausting duct 4, described time exhausting duct 2 is provided with back exhaust valve 17, the air -return duct
Air returning valve 21 is provided with, the exhausting duct 4 is provided with exhaust valve 22, and the air -return duct is connected with the mixed bellows 5.Air delivery duct 1
It is provided with blow valve 16.
Further optimize the structure of the air-conditioning system, such as scheme, the fresh flue 3 includes fresh air supervisor 301 and two fresh airs
Branch pipe 302, the port of export of fresh air branch pipe 302 described in two is equipped with new air-valve 18 and connected with the mixed bellows 5, wherein described in one
New blower fan 23 is provided with fresh air branch pipe 302.By the fresh flue 3 of the structure, the all-fresh air operation mould of this air-conditioning system can be achieved
Under formula and small fresh air operational mode, all-fresh air operational mode, two fresh air branch pipes 302 are opened, it is ensured that fresh air supply amount, small new
Under wind operational mode, the fresh air branch pipe 302 provided with new blower fan 23 is opened and another fresh air branch pipe 302 is closed, to control fresh air to supply
Ying Liang；The caliber of fresh air branch pipe 302 provided with new blower fan 23 is preferably less than the caliber of another fresh air branch pipe 302, the pipe of the two
The ratio between footpath is 1:2~2:Between 3, preferable fresh air regulation ratio can be obtained, it is ensured that the stable operation of air-conditioning system.
Usually, above-mentioned pressure fan 8, time exhaust blower 26 and new blower fan 23 are both preferably and use VFC mode, i.e., each
Blower fan is respectively connected with frequency converter.
As schemed, this air-conditioning system also includes central controller, for realizing the Automated condtrol to system, above-mentioned air-supply
Valve 16, time exhaust valve 17, air returning valve 21, exhaust valve 22, new air-valve 18, balanced valve 25, the operating circuit of new blower fan 23, pressure fan
The operating circuit of 8 operating circuit and described time exhaust blower 26 is electrically connected with the central controller, these elements and circuit with
The electric connection structure of central controller is that those skilled in the art are easy to know according to prior art, and here is omitted.On
Air-supply frequency converter 19, time air draft frequency converter 20 and the fresh air frequency converter 24 stated are electrically connected with the central controller.
Further, the air delivery duct 1 and described time exhausting duct 2 are respectively provided with the constant pipe of at least one section of characteristics resistance coefficient
Section, such as Fig. 1 is equipped with differential pressure pickup 11 and temperature sensor (or humiture on the air delivery duct 1 and described time exhausting duct 2
Sensor) 12, each differential pressure pickup 11 has for the first pressure interface with indoor connection and is connected to corresponding
Second pressure interface on air channel.Preferably, the air-conditioning system also includes the comparator 32 of first comparator 31 and second, air delivery duct
Differential pressure pickup 11 on 1 is electrically connected with the first comparator 31, and the differential pressure pickup 11 returned on exhausting duct 2 second is compared with this
Device 32 is electrically connected, and temperature sensor 12 described in first comparator 31, the second comparator 32, two, described is controlled with the center
Device is electrically connected.Above-mentioned first comparator 31, the second comparator 32 are used for what the constant pipeline section of characteristics resistance coefficient was converted
Static pressure difference and the signal data of the differential pressure pickup 11 on corresponding air channel are compared, in order to the central controller controls wind
The wind flow in road.
Further, the air-conditioning system also includes the 3rd comparator 33；Temperature Humidity Sensor is provided with the fresh flue 3
14, the described time porch of exhausting duct 2 is provided with return air enthalpy transmitter, the return air enthalpy transmitter and the 3rd comparator 33
Electrical connection, the Temperature Humidity Sensor and the 3rd comparator 33 are electrically connected with the central controller.For above-mentioned
Fresh flue 3 provided with fresh air branch pipe 302, the Temperature Humidity Sensor 14 is preferably to be arranged in fresh air supervisor 301.Above-mentioned the 3rd
Comparator 33 is used for outdoor fresh air enthalpy and is compared with indoor design return air point return air enthalpy, wherein, the outdoor fresh air
The data that enthalpy can be detected according to the Temperature Humidity Sensor 14 set on fresh flue 3, which are calculated, to be obtained.Further, can be in fresh flue
Fresh air enthalpy transmitter is set in 3, and the fresh air enthalpy transmitter is electrically connected with central controller, passes through the fresh air enthalpy transmitter
Detect fresh air enthalpy, and obtain new is calculated with the data that are detected above by the Temperature Humidity Sensor 14 that is set on fresh flue 3
Wind enthalpy compares, and when the two difference is larger, can alarm, cause system mistake to run to avoid parameter error.
It is preferably by above-mentioned first comparator 31, the second comparator 32, the 3rd comparator 33 and center in the present embodiment
Controller is integrated in a switch board.Above-mentioned central controller is preferably to use PLC.The air-conditioning system that the present embodiment is provided was both
It can be completely independent and automatically adjust operation, not limited by other systems with influenceing；It can pass through simultaneously with monitor supervision platform in co-level
Ethernet etc. is attached, and the transmission of data can be carried out by BACnet/IP agreements.The air-conditioning system has long-range take over, originally
Ground is manual, local automatic three kinds of shaping modes, with power frequency pattern, two kinds of control loops of variable mode, with remote operation, sheet
Cabinet operation, three kinds of start stop operation modes of execute-in-place；The switch board further also has fire signal interface.Further, should
Switch board can record the operation electricity and run time of each blower fan, and send continuous data to Centralized Monitoring platform, by concentrating
Monitor supervision platform carries out statistical analysis, and creation data form, to instruct the Energy Saving Control of this air-conditioning system to operate.Further,
The switch board can be recorded to the specific time that the protection of the failure of each equipment in running and system occurs, and in control
Malfunction indicator lamp is provided with cabinet, when device fails, system can light malfunction indicator lamp automatically, points out operating personnel row
Except failure.
Further, described time exhausting duct 2 is provided with CO2 concentration sensors 13, the CO2 concentration sensors 13 with it is described
Central controller is electrically connected.Indoor CO is detected by the CO2 concentration sensors 132Concentration, draws to a certain extent when air quantity reduces
Play interior CO2Concentration over-standard, its feedback information to central controller, central controller can be using total air output of raising system etc.
Mode makes indoor CO2Concentration as little as certain safety value.Aforesaid way causes the air-conditioning system that the present invention is provided to have in CO2It is dense
Automatic protection functions when spending high, improve IAQ.Filter 6 is imported and exported in addition, differential pressure pickup 15 also can be set
Both sides pressure difference is monitored, and is run with the normal table for ensureing filter 6.
It should be noted that the Automated condtrol being related in above-mentioned air-conditioning system running can using it is existing it is conventional from
Dynamicization control mode, without programming in addition.
Embodiment two
The embodiment of the present invention provides a kind of control method of air-conditioning system, the air-conditioning provided available for above-described embodiment one
To control it to run in system, automatically controlling for air-conditioning system is realized.
The control method for the air-conditioning system that the present embodiment is provided relates generally to air-blower control and water valve (refers mainly to air-conditioning system
The chilled water motor-driven valve of surface cooler 7) aspect of control two, wherein：
Air-blower control is the output that simultaneously record system is calculated by the collection to the various technological parameters of system and device parameter
Energy trend sequence, with reference to the load of the Inference Forecast future time instance system such as system performance, cycle period, historical load data,
So that it is determined that total air output size of air-conditioning system, is returned further according to air-conditioning system return air temperature and the return air temperature with system design
The comparative result of air temperature determines the ratio of the air output of air-conditioning system, so as to realize the frequency conversion dress of the pressure fan 8 of air-conditioning system
FREQUENCY CONTROL is put, and returns exhaust blower 26 using adaptable air quantity (frequency) operation of system for tracking pressure fan 8, to maintain regulatory region
The malleation of domain (public area, interior etc.) environment；
For 2 stages of control point of the chilled water motor-driven valve of surface cooler 7, when the operation total blast volume of system requirements is set in minimum
When counting more than total blast volume, system operation total blast volume needs to use variable air volume running mode according to interior, now ensures wind pushing temperature
It is constant；When the operation total blast volume of system requirements is in minimum total blast volume, adjusted according to return air temperature the output of surface cooler 7 with
Meet indoor load demand.
Specifically, the above method includes following aspect：
(1) as schemed, when the operation total blast volume of system requirements is more than the minimal design total blast volume of system, this method includes：
Obtain the indoor ventilation F1 and return air amount F2 being actually needed；Preferably, the F1 and F2 acquisition methods are：Obtain
The temperature data for returning air draft (can be by obtaining back the data reality of temperature sensor on exhausting duct 2 or Temperature Humidity Sensor 12
It is existing), it is compared with indoor design temperature, according to difference is compared, is calculated by energy requirement and obtain the F1 and the F2；Specifically
Ground, can calculate indoor the ventilation F1 and F2 being actually needed according to calorifics formula Q=cm △ t；
The constant pipeline section D1 of characteristics resistance coefficient is chosen on air delivery duct 1 (for example, the resistance of subway's air-conditioning system pipe network is special
Property coefficient is changed because of influence of other systems etc. in valve regulated, shared air channel), the F1 is converted into the D1
Corresponding static pressure difference T1 (specifically the corresponding static pressure of air quantity can be determined according to characteristic curve of fan and resistance of pipe system curve,
This is that those skilled in the art are easy to determination, is omitted herein)；Obtain the pressure difference data between outlet in the pipe of air delivery duct 1
(can be realized by obtaining the data of the differential pressure pickup 11 on air delivery duct 1), and compared with the T1, to instruct air delivery duct 1
Actual air output；
The constant pipeline section D2 of characteristics resistance coefficient is chosen on exhausting duct 2 is returned, the F2 is converted into corresponding to the D2
Static pressure difference T2；The pressure difference data obtained back in the pipe of exhausting duct 2 between entrance (can be by obtaining back on exhausting duct 2
The data of differential pressure pickup 11 are realized), and compared with the T2, to instruct back the reality of exhausting duct 2 to return exhaust air rate.
In the above method, instructing the mode of the actual air output of air delivery duct 1 can be：Pressure fan 8 is controlled by controller
Converter plant, to control the air output of pressure fan 8 so that the signal data of the differential pressure pickup 11 on air delivery duct 1 with it is above-mentioned
T1 try one's best it is close.Instruct back the mode of the reality time exhaust air rate of exhausting duct 2 identical, repeat no more.Operation can make more than
Pressure fan 8 and the variable frequency adjustment of time exhaust blower 26 can guarantee that indoor temperature maintains setting requirements within the cycle of a setting
In the range of, it thereafter automatically enter next cycle period.
The major advantage of the above method is the pipeline section that will not be changed according to the live pipeline section characteristics resistance coefficient of selection, and
Enter database by debugging acquisition True Data, static pressure difference formula of the systematic air flow in the pipeline section is re-formed, as below
The calculation basis of preceding feedback regulation mode, can fast approaching desired value complete regulation, it is to avoid it is very long to compare repeatedly, feed back
Operation.
(2) when the operation total blast volume of system requirements is not more than the minimal design total blast volume of system, by the total wind of minimal design
Amount operation, now, the converter plant of pressure fan 8 are worked using corresponding frequency, and the converter plant for returning exhaust blower 26 follows air-supply
Machine 8 is using adaptable frequency operation.
Further optimize the above method, corresponding to above-mentioned control mode, the control process of the chilled water motor-driven valve of surface cooler 7 is such as
Under：When the operation total blast volume of system requirements is more than the minimal design total blast volume of system, according to the wind pushing temperature number in air delivery duct 1
According to (data can be obtained by the temperature sensor on air delivery duct 1 or Temperature Humidity Sensor 12) regulation chilled water on return pipe
The aperture of balanced valve 25, to keep wind pushing temperature constant；When the operation total blast volume of system requirements is not more than the minimal design of system
During total blast volume, (it can be obtained according to the temperature data for returning air draft by the temperature sensor or Temperature Humidity Sensor 12 returned on exhausting duct 2
Access evidence) aperture of the chilled water for the balanced valve 25 on return pipe is adjusted, to meet indoor load demand.
Further optimize the above method, in addition to above-mentioned air-blower control and the control of the chilled water motor-driven valve of surface cooler 7 is related to,
In the actual motion of air-conditioning system, automatically controlling in terms of following each operating mode is also related to：
(1) air-conditioning system provided based on above-described embodiment one, obtain fresh air warm and humid degrees of data (can by installed in
Temperature Humidity Sensor 14 on fresh flue 3 obtains data), calculate outdoor fresh air enthalpy H1 and with indoor design return air point return air enthalpy
Value H2 (i.e. the design return air enthalpy of indoor design return air point) is compared, as H1 ＞ H2, using the small fresh air method of operation, institute
State back returning after air draft is at least partly mixed with fresh air in exhausting duct 2 and send into interior；As H1 ＜ H2 and outdoor fresh air temperature is more than
During system air-supply point temperature, system uses the air draft of returning in the all-fresh air method of operation, described time exhausting duct 2 to be discharged into exhausting duct 4
It is interior.In the present embodiment, it is preferable that the above-mentioned small fresh air method of operation is：New blower fan 23 is run and on corresponding fresh air branch pipe 302
New air-valve 18 is opened, and the new air-valve 18 on another fresh air branch pipe 302 is closed, and exhaust valve 22 is closed, and air returning valve 21 is opened, return air with
Sent into after small fresh air mixing and after processing indoor.And the all-fresh air method of operation is：Two new air-valves 18 are opened, and new blower fan 23 stops
Only run, exhaust valve 22 is opened, air returning valve 21 is closed, return air draft and be directly discharged into exhausting duct 4, outdoor fresh air is sent into after processing
It is indoor.
(2) air-conditioning system provided based on above-described embodiment one, obtain fresh air warm and humid degrees of data (can by installed in
Temperature Humidity Sensor 14 on fresh flue 3 obtains data), outdoor fresh air enthalpy H1 is calculated, the H1 and indoor design are blown
Point air-supply enthalpy H3 (i.e. the design air-supply enthalpy of indoor design air-supply point) is compared, when in H1 ＜ H3 or fresh air supervisor 301
Temperature sensor or Temperature Humidity Sensor 14 15 DEG C of dry-bulb temperature ＜ when, using the all-fresh air method of operation, all-fresh air fortune
Here is omitted for line mode, and outdoor fresh air is utilized air conditioner without cooling treatment (still including filtration treatment, noise elimination processing etc.)
It is sent directly into interior.
(3) when winter outdoor fresh air is less than certain temperature (such as 5 DEG C), then part is opened for air returning valve 21 and exhaust valve 22, is returned
After wind is mixed with outdoor fresh air, feeding is indoor, to improve the comfortableness of winter ventilation.
(4) CO of air draft is obtained back2Concentration data C1 (can be by installed in the CO returned on exhausting duct 22Concentration sensor 13
Obtain data), and with indoor design CO2Concentration secure threshold is compared C0, and as C1 ＞ C0, (such as air quantity is reduced to certain journey
Degree causes indoor CO2Concentration over-standard), preferentially by the way of total air output of raising system, it is less than to C1 after C0, replys former ginseng
Number operation, namely extremely interior CO2Concentration as little as certain safety value when, return original Air-condition system control mode.Above-mentioned side
Formula causes the air-conditioning system that the present invention is provided to have in CO2Automatic protection functions when concentration is high, improve IAQ.
(5) under fire working, the keying that superior command performs relevant device is received.
Under above-mentioned each operating mode, indoor additional air can ooze out from oral area malleation, to ensure indoor air quality；Above-mentioned oral area
The vent locations communicated including ventilating opening, exhaust outlet etc. with the external world.
Above outdoor air parameter, interior CO2Concentration, temperature data can be set and adopted using building B AS system conventions
The data of collection, while the system is also equipped with one group of outdoor air parameter and multigroup airduct humiture collection device, can with from
BAS system data are contrasted and sent prompting, to judge the reliability of harvester, it is to avoid because of the inaccurate of gathered data
Cause to be unable to practical application.
Compared with conventional measure, the present invention by monitoring indoor and outdoor air parameter and IAQ in real time, for upper
Each the different operating mode stated, system automatic choosing running mode, fresh air proportion and can send/return air amount in real time, and regulation surface cooler 7 is supplied
Backwater amount, realizes the operation control of air quality, indoor temperature and humidity, the air-conditioning system of system energy consumption three's optimum control, can solve
The drawbacks of certainly existing air-conditioning system can not automatically select operating mode and high operation energy consumption, can be in subway station air-conditioning system or large-scale
Promoted, used for reference and applied in Gongjian's design of air conditioning.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (10)
1. a kind of control method of air-conditioning system, it is characterised in that
When the operation total blast volume of system requirements is not more than the minimal design total blast volume of system, transported by the minimal design total blast volume
OK；
When the operation total blast volume of system requirements is more than the minimal design total blast volume of system, methods described includes：
Obtain the indoor ventilation F1 and return air amount F2 being actually needed；
The constant pipeline section D1 of characteristics resistance coefficient is chosen on air delivery duct, the F1 is converted into the static pressure difference corresponding to the D1
Value T1；The pressure difference data between outlet in the pipe of air delivery duct is obtained, and is compared with the T1, to instruct actually sending for air delivery duct
Air quantity；
The constant pipeline section D2 of characteristics resistance coefficient is chosen on exhausting duct is returned, the F2 is converted into the static pressure corresponding to the D2
Difference T2；The pressure difference data between entrance in the pipe of exhausting duct is obtained back, and is compared with the T2, to instruct back exhausting duct
It is actual to return exhaust air rate.
2. the control method of air-conditioning system as claimed in claim 1, it is characterised in that the F1 and F2 acquisition methods
For：
The temperature data of air draft is obtained back, is compared with indoor design temperature, according to difference is compared, is calculated by energy requirement
To the F1 and the F2.
3. the control method of air-conditioning system as claimed in claim 1, it is characterised in that：When the operation total blast volume of system requirements is big
When the minimal design total blast volume of system, according to the wind pushing temperature data regulation chilled water in air delivery duct for the balance on return pipe
The aperture of valve, to keep wind pushing temperature constant；
When the operation total blast volume of system requirements is not more than the minimal design total blast volume of system, adjusted according to the temperature data for returning air draft
Aperture of the chilled water for the balanced valve on return pipe is saved, to meet indoor load demand.
4. the control method of air-conditioning system as claimed in claim 1, it is characterised in that：Obtain the warm and humid degrees of data of fresh air, meter
Calculate outdoor fresh air enthalpy H1 and be compared with indoor design return air point return air enthalpy H2,
As H1 ＞ H2, returning in described time exhausting duct is sent into indoor after air draft is at least partly mixed with fresh air；
When H1 ＜ H2 and outdoor fresh air temperature are more than system air-supply point temperature, system uses the all-fresh air method of operation, described time
Air draft of returning in exhausting duct is discharged into exhausting duct.
5. the control method of air-conditioning system as claimed in claim 4, it is characterised in that：The fresh flue is responsible for including a fresh air
With two fresh air branch pipes, fresh air branch outlet end described in two is equipped with new air-valve and connected with mixed bellows, in the fresh air supervisor
Provided with temperature sensor, wherein being provided with new blower fan in fresh air branch pipe described in one, described time exhausting duct is connected with air -return duct and air draft
Road, the air -return duct is provided with air returning valve, and the exhausting duct is provided with exhaust valve.
6. the control method of air-conditioning system as claimed in claim 5, it is characterised in that：As H1 ＞ H2, the new blower fan fortune
New air-valve on the capable and corresponding fresh air branch pipe is opened, and the new air-valve on another fresh air branch pipe is closed, the air draft
Valve is closed, and the air returning valve is opened；
When H1 ＜ H2 and outdoor fresh air temperature are more than system air-supply point temperature, new air-valve described in two is opened, the new blower fan
Out of service, the exhaust valve is opened, and the air returning valve is closed.
7. the control method of air-conditioning system as claimed in claim 5, it is characterised in that：By the H1 and indoor design air-supply point
Air-supply enthalpy H3 is compared, as 15 DEG C of the dry-bulb temperature ＜ of the temperature sensor in H1 ＜ H3 or described fresh airs supervisor
When, new air-valve is opened described in two, and the new blower fan is out of service, and the exhaust valve is opened, and the air returning valve is closed, the sky
The air-supply cooling body of adjusting system is out of service.
8. the control method of the air-conditioning system as any one of claim 1 to 7, it is characterised in that：Obtain back air draft
CO2Concentration data C1, and with indoor design CO2Concentration secure threshold is compared C0, as C1 ＞ C0, improves always sending for system
Air quantity, is less than after C0 to C1, replys original parameter operation.
9. a kind of air-conditioning system, including air delivery duct, time exhausting duct and fresh flue, the air delivery duct is provided with pressure fan and air
Mechanism is managed, described time exhausting duct is provided with back exhaust blower, and the fresh flue is connected with the air delivery duct arrival end, and its feature exists
In：The air delivery duct and described time exhausting duct are respectively provided with the constant pipeline section of at least one section of characteristics resistance coefficient, the air delivery duct and
Differential pressure pickup and temperature sensor are equipped with described time exhausting duct, each differential pressure pickup, which has, to be used for interior even
Logical first pressure interface and the second pressure interface being connected on corresponding air channel；
Also include the differential pressure pickup on central controller, first comparator and the second comparator, the air delivery duct and institute
The differential pressure pickup stated on first comparator electrical connection, described time exhausting duct is electrically connected with second comparator, described
First comparator, second comparator, temperature sensor, the pressure fan and described time exhaust blower described in two with it is described in
Entreat controller electrical connection.
10. air-conditioning system as claimed in claim 9, it is characterised in that：Also include the 3rd comparator；
Temperature Humidity Sensor is provided with the fresh flue, described time exhausting duct porch is provided with return air enthalpy transmitter, described time
Wind enthalpy transmitter is electrically connected with the 3rd comparator, the Temperature Humidity Sensor and the 3rd comparator with it is described in
Entreat controller electrical connection.
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| CN201710414557.3A CN107218654A (en) | 2017-06-05 | 2017-06-05 | The control method and air-conditioning system of air-conditioning system |
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| CN201710414557.3A CN107218654A (en) | 2017-06-05 | 2017-06-05 | The control method and air-conditioning system of air-conditioning system |
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| CN111043698A (en) * | 2019-12-19 | 2020-04-21 | 东南大学 | Modular fresh air pretreatment equipment |
| CN111365800A (en) * | 2020-03-23 | 2020-07-03 | 江苏柯瑞机电工程股份有限公司 | Energy-saving air conditioning system and method |
| CN113048571A (en) * | 2021-03-04 | 2021-06-29 | 珠海格力电器股份有限公司 | Air duct machine and control method thereof |
| CN113587410A (en) * | 2021-07-13 | 2021-11-02 | 无锡地铁集团有限公司 | Air quantity measuring device, subway air conditioning system and control method |
| CN114992729A (en) * | 2021-03-01 | 2022-09-02 | 同方股份有限公司 | Direct expansion air conditioning system suitable for subway station and control method thereof |
| CN115371210A (en) * | 2022-07-28 | 2022-11-22 | 湖北中健医疗用品有限公司 | Energy-saving control method, medium, device and terminal for purifying air conditioning system |
| CN115406085A (en) * | 2022-09-13 | 2022-11-29 | 重庆山那里环境科技有限公司 | New return air multi-channel variable air volume intelligent ventilation and air conditioning unit and control method |
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