CN102393058B - End control system for air conditioning systems - Google Patents
End control system for air conditioning systems Download PDFInfo
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- CN102393058B CN102393058B CN 201110326583 CN201110326583A CN102393058B CN 102393058 B CN102393058 B CN 102393058B CN 201110326583 CN201110326583 CN 201110326583 CN 201110326583 A CN201110326583 A CN 201110326583A CN 102393058 B CN102393058 B CN 102393058B
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- air
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- conditioning unit
- controller
- air conditioning
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 71
- 238000004891 communication Methods 0.000 claims abstract description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 52
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 26
- 239000001569 carbon dioxide Substances 0.000 claims description 25
- 238000001514 detection method Methods 0.000 claims description 12
- 238000005422 blasting Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- 238000001816 cooling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
The invention relates to an end control system for air conditioning systems, which is used for controlling the minimum air supply quantity of an air conditioning end of a central air conditioning system. The end control system for air conditioning systems comprises a supplied air freshness detector and a controller, wherein the supplied air freshness detector is in communication connection with the controller, and used for detecting the air freshness beta of supplied air of an air conditioning unit, and transmitting the obtained numerical values to the controller; and the controller is in communication connection with the air conditioning end, and used for receiving and storing the user-preset area Az of a building and the user-preset number Pz of people living in the building, calculating the minimum demanded fresh air quantity in accordance with a formula of CFM (cubic foot per minute) fresh air = Rp.Pz + Ra.Az according to a preset fresh air rate Ra required by each unit area and a preset fresh air rate Rp required by each person, and then controlling the minimum air supply quantity of the air conditioning end according to the following formula: CFMmin = CFM fresh air/beta. By using the end control system disclosed by the invention, the fresh air supply of a space to which the air conditioning end is applied is ensured, and the energy consumption of the air conditioning system is effectively reduced; and meanwhile, the control system is simple in structure and low in cost.
Description
Technical field
The present invention relates to the control system of air conditioning terminal of the air-conditioning system of dwelling house and business premises.
Background technology
The air quantity variable air conditioner end is widely used in the air-conditioning system of commercial mansion, industrial premises and dwelling house, common application includes but not limited to single air channel variable-air-volume air conditioner unit, two air channels variable-air-volume air conditioner unit and multizone air-treatment unit, and its effect is the gas of regulating the room.
Common air quantity variable air conditioner end is comprised of one (single air channel) or a plurality of (two air channel) air-valve, heat(ing) coil, flowmeter, wind pushing temperature sensor and controller.Controller can receive the information from thermostat, inductive pick-up and carbon dioxide sensor.
New wind is an indispensable part in the mankind or animal living space, can also dilute the VOC (VOC) in room when it provides oxygen for the human and animal.In order to ensure the new wind requirement that can satisfy building, air-conditioning system has all been set a minimum air-supply value.Due under the loading condiction of setting, the resh air requirement of taking in from the air-conditioning unit is generally 10% to 20% of total air output, thus minimum air output usually up to end the highest air output 40%.No matter building loading is much, minimum air output remains unchanged.During lower than minimum air quantity, need again heat to keep the stable of room temperature when the demand air quantity of end.This will cause occurring the power consumption of a large amount of heating, cooling and fan power, and can not satisfy minimum resh air requirement requirement.
In order to keep stable new wind to take in, propose and implemented some engineering improvement methods.The control method that requires based on new wind is one of them.Carbon dioxide sensor is arranged on backwind tube, is used for surveying the gas concentration lwevel of actual return air.Gas concentration lwevel is controlled at than the high 700PPM of outdoor atmospheric carbon dioxide concentration.If gas concentration lwevel lower than 700PPM, turns down outdoor adjusting air valve than the concentration of outdoor atmospheric carbon dioxide, vice versa.There is following problem in the method: (1) is because occupation of land and the new wind requirement in each zone are different, so it can not guarantee that there is suitable new wind in each zone; (2) if when a small amount of new wind being arranged in building or diluting VOC with new wind, it can't work.
In order to solve the control problem that needs based on new wind, a kind of common way is that return air gas concentration lwevel desired value is arranged on a very low level, for example only higher than outdoor atmospheric carbon dioxide concentration 400PPM.Although the method has improved each regional resh air requirement, but can not guarantee the indoor good ventilation effect and satisfy new wind requirement of having, and greatly increase the absorption of new wind.End also will carry out heating and cooling to this part new wind, has caused more power consumption.When using the method, minimum fresh air requirmente is taken in and is usually remained unchanged or up to 40% of design air flow.
A kind of method in addition is that suggestion is installed carbon dioxide sensor in each room.The method can guarantee to have each room of the normal inhabitation of people or office to have sufficient new wind.But the resh air requirement in nobody's zone is zero, can make like this this part zone pile up a large amount of VOC, thereby can not guarantee the indoor good air quality that has.And the method is not established minimum air output and is needed to install a large amount of carbon dioxide sensors and cause that just cost is high, waste a large amount of electric energy air is heated, cooling and provide on power for blower fan.
For head it off, developed the Special fresh air handling group.This Special fresh air handling group can provide constant resh air requirement for the building according to design conditions.Because the personnel amount in the building and each office are different on each time period, so in most cases the new wind in Special fresh air handling group supply chamber is excessive, but some zone is not enough.So the Special fresh air handling group can not solve the problem of the new wind of building.And the method exists also that waste is a large amount of can be hot, cooling and provide on power for blower fan again to new wind.
Summary of the invention
Technical problem to be solved by this invention is, a kind of control system of air conditioning terminal is provided, and the minimum air output of control air conditioning terminal that can be suitable can satisfy building to the requirement of new wind, can reduce again the energy consumption of air being carried out again heat or refrigeration.
The control system of air conditioning terminal of the present invention for the minimum air output of the air conditioning terminal of controlling central air conditioner system, comprises air-supply freshness detector and controller; Described air-supply freshness detector with the communication connection of described controller, for detection of the air freshness β of the air-conditioning unit blasting air of described central air conditioner system, and sends numerical value to described controller; Described controller with described air conditioning terminal communication connection, is used for receiving and storing the floor area of building A that the user sets
zWith inhabitation number P
z, according to the default required new wind rate R of per unit area
aWith everyone required new wind rate R
p, calculate minimum fresh air demand CFM
Fresh air=R
p.P
z+ RaA
z, and then control the minimum air output CFM of described air conditioning terminal
min=CFM
Fresh air/ β.
Preferably, state air-supply freshness detector and comprise the first carbon dioxide sensor, the second carbon dioxide sensor and computing module; Described the first carbon dioxide sensor is arranged in the fresh wind tube of air-conditioning unit, the gas concentration lwevel value CO of the new wind of taking in for detection of described air-conditioning unit
2outsideair, and numerical value is sent to described computing module; Described the second carbon dioxide sensor is arranged in the ajutage of air-conditioning unit, for detection of the gas concentration lwevel value CO of described air-conditioning unit blasting air
2primary, and numerical value is sent to described computing module; Described computing module is used for receiving the described CO of described the first carbon dioxide sensor and the transmission of the second carbon dioxide sensor
2Outsideair value and CO
2The primary value, and according to the gas concentration lwevel increasing value Δ CO that prestores
2With computing formula β=1-(CO
2primary-CO
2outsideair)/Δ CO
2, calculate the air freshness β of air-conditioning unit blasting air, and send described controller to.
Preferably, described air-supply freshness detector comprises the first VOC sensor, the second VOC sensor and computing module; Described the first VOC installation of sensors in the fresh wind tube of air-conditioning unit, the VOC concentration value VOC of the new wind of taking in for detection of the air-conditioning unit
Outsideair, and send to described computing module; Described the second VOC installation of sensors is in the ajutage of air-conditioning system, for detection of the VOC concentration value VOC of air-conditioning unit blasting air
Primary, and send to described computing module; Described computing module is used for receiving the numerical value of described the first VOC sensor and the transmission of the second VOC sensor, and according to the VOC concentration increasing value Δ VOC that prestores and computing formula β=1-(VOC
Primary-VOC
Outsideair)/Δ VOC calculates the air freshness β of air conditioner system air blast, and sends described controller to.
Beneficial effect of the present invention is: adopt a control system to control simultaneously a plurality of air conditioning terminals of unified air-conditioning system, and according to the area in each air conditioning terminal applied space and the difference of number, the minimum air output of each air conditioning terminal is controlled, when having taken into full account space occupied and unoccupied (people and no one are namely arranged), this minimum air output to the requirement of new wind, effectively reduced the power consumption of air-conditioning system in the fresh air supply that guarantees the applied space of air conditioning terminal; This control system is simple for structure simultaneously, and cost is low.
Description of drawings
Accompanying drawing is the system applies figure of the specific embodiment of the invention one.
The specific embodiment
The specific embodiment one
As shown in Figure 1, be the application drawing of the control system of the air conditioning terminal of present embodiment.The air conditioning terminal control system of this specific embodiment comprises air-supply freshness detector 1 and the controller 2 of mutual communication connection, wherein this air-supply freshness detector 1 comprises the first carbon dioxide sensor, the second carbon dioxide sensor and computing module, the first carbon dioxide sensor, the second carbon dioxide sensor are arranged on respectively fresh wind tube and the ajutage of the air-conditioning unit of central air conditioner system, the gas concentration lwevel value CO of the new wind of taking in for detection of the air-conditioning unit
2outsideair, and the gas concentration lwevel value CO of air-supply
2primary, and send measured value to computing module, computing module calculates the air-supply freshness β of air-conditioning unit according to the following computing formula that prestores:
β＝1-(CO
2primary-CO
2outsideair)/ΔCO
2
Wherein, Δ CO
2Increasing value for the gas concentration lwevel of typical residential area or building expectation is pre-stored in computing module the numerical value 700PPM that present embodiment adopts ASHRAE standard 62.2 to recommend.
Described computing module and controller 2 have communication connection, after calculating the numerical value of β, send this numerical value to controller 2.
Be preset with the required new wind rate R of per unit area in controller 2
aWith everyone required new wind rate R
p, R
aAnd R
pSize can select, the value that this specific embodiment adopts ASHRAE standard 62.2 to recommend, that is: R
a=0.06CFM/ft
2, R
p=5CFM/ everyone; Simultaneously, controller 2 can also receive the user and set the applied floor area of building A of connected arbitrary air conditioning terminal
z(unit is ft
2) and inhabitation number P
z(unit behaviour).
During operation, controller 2 is according to formula:
CFM
Fresh air=R
pP
z+ R
aA
z
Calculate respectively the air volume flow rate CFM of the new wind needs of each air conditioning terminal
Fresh air, unit is ft
3/ min; And the numerical value β and the formula that further transmit according to air freshness detector:
CFM
min=CFM
Fresh air/ β
Calculate the minimum air output CFM of air conditioning terminal
min, and transmit control signal to the built-in controller of air conditioning terminal, the minimum air-supply value that upgrades air conditioning terminal is CFM
min
The specific embodiment two
This specific embodiment only is that from the difference of the specific embodiment one detection of air freshness is different, and the below only should not identical part be described.
Present embodiment adopts two VOC sensors, replaces a kind of the first carbon dioxide sensor and the second carbon dioxide sensor of the specific embodiment, is respectively used to detect the VOC concentration value VOC of the new wind that the air-conditioning unit takes in
OutsideairVOC concentration value VOC with air-supply
Primary, and send measured value to computing module, computing module calculates the air-supply freshness β of air-conditioning unit according to the following computing formula that prestores:
β＝1-(VOC
primary-VOC
outsideair)/ΔVOC
Wherein, Δ CO2 is the increasing value of the VOC concentration of typical residential area or building expectation, is pre-stored in computing module the numerical value 700PPM that present embodiment adopts ASHRAE standard 62.2 to recommend.
The present embodiment remainder is all identical with embodiment one.
Above content is in conjunction with concrete preferred embodiment further description made for the present invention, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (3)
1. the control system of an air conditioning terminal, for the minimum air output of the air conditioning terminal of controlling central air conditioner system, comprise air-supply freshness detector and controller;
Described air-supply freshness detector with the communication connection of described controller, for detection of the air freshness β of the air-conditioning unit blasting air of described central air conditioner system, and sends numerical value to described controller;
Described controller with described air conditioning terminal communication connection, is used for receiving and storing the floor area of building A that the user sets
zWith inhabitation number P
z, according to the default required new wind rate R of per unit area
aWith everyone required new wind rate R
p, calculate minimum fresh air demand CFM
Fresh air=R
p.P
z+ RaA
z, and then control the minimum air output CFM of described air conditioning terminal
min=CFM
Fresh air/ β.
2. control system according to claim 1, is characterized in that, described air-supply freshness detector comprises the first carbon dioxide sensor, the second carbon dioxide sensor and computing module;
Described the first carbon dioxide sensor is arranged in the fresh wind tube of air-conditioning unit, the gas concentration lwevel value CO of the new wind of taking in for detection of described air-conditioning unit
2outsideair, and numerical value is sent to described computing module;
Described the second carbon dioxide sensor is arranged in the ajutage of air-conditioning unit, for detection of the gas concentration lwevel value CO of described air-conditioning unit blasting air
2primary, and numerical value is sent to described computing module;
Described computing module is used for receiving the described CO of described the first carbon dioxide sensor and the transmission of the second carbon dioxide sensor
2outsideairValue and CO
2primaryValue, and according to the gas concentration lwevel increasing value △ CO that prestores
2With computing formula β=1-(CO
2primary-CO
2outsideair)/△ CO
2, calculate the air freshness β of air-conditioning unit blasting air, and send described controller to.
3. control system according to claim 1, is characterized in that, described air-supply freshness detector comprises the first VOC sensor, the second VOC sensor and computing module;
Described the first VOC installation of sensors in the fresh wind tube of air-conditioning unit, the VOC concentration value VOC of the new wind of taking in for detection of the air-conditioning unit
Outsideair, and send to described computing module;
Described the second VOC installation of sensors is in the ajutage of air-conditioning unit, for detection of the VOC concentration value VOC of air-conditioning unit blasting air
Primary, and send to described computing module;
Described computing module is used for receiving the numerical value of described the first VOC sensor and the transmission of the second VOC sensor, and according to the VOC concentration increasing value △ VOC and the computing formula β=1-(VOC that prestore
Primary-VOC
Outsideair)/△ VOC calculates the air freshness β of air-conditioning unit blasting air, and sends described controller to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110326583 CN102393058B (en) | 2011-10-24 | 2011-10-24 | End control system for air conditioning systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110326583 CN102393058B (en) | 2011-10-24 | 2011-10-24 | End control system for air conditioning systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102393058A CN102393058A (en) | 2012-03-28 |
| CN102393058B true CN102393058B (en) | 2013-05-08 |
Family
ID=45860416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110326583 Active CN102393058B (en) | 2011-10-24 | 2011-10-24 | End control system for air conditioning systems |
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| CN (1) | CN102393058B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106839322A (en) * | 2017-02-23 | 2017-06-13 | 林兴斌 | The real-time ventilation air calculation procedure of multizone and its implementation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878641B (en) * | 2012-10-11 | 2014-10-15 | 重庆大学 | Energy-saving control method for fresh air |
| CN104048386A (en) * | 2014-07-01 | 2014-09-17 | 深圳合众环境科技实业有限公司 | Fresh air control system and control method |
| CN108592178B (en) * | 2018-03-15 | 2020-08-11 | 珠海格力电器股份有限公司 | Control method and device of oxygen generator and oxygen-enriched air conditioner |
| CN109635230A (en) * | 2018-12-07 | 2019-04-16 | 武汉海翼科技有限公司 | A kind of calculation method of single channel multi partition air quantity variable air conditioner fresh air volume |
| CN114791141B (en) * | 2021-01-25 | 2024-03-15 | 浙江盾安人工环境股份有限公司 | Control method and device of fresh air system, electronic device and computer equipment |
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| CN106839322B (en) * | 2017-02-23 | 2019-05-14 | 林兴斌 | The real-time ventilation air calculation procedure of multizone and its implementing device |
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|---|---|
| CN102393058A (en) | 2012-03-28 |
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