CN101975434B - Variable static pressure control method for variable air volume air conditioning system - Google Patents
Variable static pressure control method for variable air volume air conditioning system Download PDFInfo
- Publication number
- CN101975434B CN101975434B CN201010508816A CN201010508816A CN101975434B CN 101975434 B CN101975434 B CN 101975434B CN 201010508816 A CN201010508816 A CN 201010508816A CN 201010508816 A CN201010508816 A CN 201010508816A CN 101975434 B CN101975434 B CN 101975434B
- Authority
- CN
- China
- Prior art keywords
- valve opening
- variable
- less
- frequency
- control method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The invention discloses a variable static pressure control method for a variable air volume air conditioning system. The variable static pressure control method comprises the following steps: leading a controller to carry out statistics on the number NH of VAVs which work normally and the number Nh of the VAVs with 100% valve opening degree in a real-time manner after starting the variable air volume air conditioning system; collecting the valve opening degree of each VAV which works normally in the real-time manner, and calculating the actual average valve opening degree V1; and setting the standard average valve opening degree V2 and the number Nb of the VAVs with the standard 100% valve opening degree. When V1 is not less than V2 and NH is not less than Nb, the frequency of a fan is increased till NH is less than Nb; if NH is less than Nb, the current frequency of the fan is maintained; when V1 is less than V2 and NH is not less than Nb, the frequency of the fan is increased till NH is less than Nb; if NH is less than Nb, the frequency of the fan is reduced till V1 is equal to V2. The variable static pressure control method can realize the variable frequency regulation of the fan according to the difference between V1 and V2, ensure the energy-saving running of the air conditioning system by setting the higher V2, firstly meet the requirements on the VAVs with the 100% valve opening degree, realize energy conservation and simultaneously give priority to the guarantee of the air volume requirement of the VAVs which are least favorable to the system.
Description
Technical field
The present invention relates to air conditioning and aeration technology, particularly relate to a kind of change static pressure control method of air conditioning system with variable.
Background technology
Air conditioning system with variable is a kind of through changing the all-air conditioning system that air output satisfies the indoor load variation.This system has good energy-conservation property and comfortableness, satisfies the good requirement of user to indoor air quality, is widely used in all kinds of buildings such as office building, hospital, library and gymnasium.
When air conditioning system with variable changes at air conditioner load; The air quantity variable end device controlling opening of valve changes the air-conditioning air output and satisfies the indoor load variation; After changing, the valve opening of air quantity variable end device causes again that the static pressure on the ajutage changes; Therefore robot control system(RCS) satisfies the load variations demand according to the air output of static pressure signal or terminal valve position signal frequency conversion adjusting air-conditioning ventilating.Because air-conditioning system is a dynamic system, load can change at any time, so robot control system(RCS) is that air conditioning system with variable is stable, the key of energy-saving run, and static pressure control is the core of variable air rate robot control system(RCS).
Variable air rate static pressure control commonly used at present has three kinds of methods: first kind is constant static-pressure control; The operation principle of this control method is (to be generally from air-conditioning unit 2/3 position) at the airduct place airduct static pressure transducer is set; Air quantity variable end device changes air output through controlling opening of valve when load variations; Valve opening changes and causes that the airduct static pressure changes; System controller makes the static pressure measured value be stabilized in setting value, to satisfy the variation of system's air output demand according to setting the frequency of static pressure with the fan frequency converter of the deviation variable frequency adjustment air-conditioning unit of actual measurement static pressure.Second kind is the conventional static pressure control that becomes; The operation principle of this control method is that air quantity variable end device changes air output through controlling opening of valve when load variations; The simultaneity factor controller is gathered the valve position signal of air quantity variable end device controller in real time; And comprehensively judge,, improve or reduce air-conditioning unit pressure fan frequency through each valve position signal is added up.The third is total blast volume control; Its operation principle is that air quantity variable end device changes air output through controlling opening of valve when load variations; The air volume signal that the simultaneity factor controller is gathered the air quantity variable end device controller in real time is actual air volume and demand air quantity; And calculating actual air volume sum and demand air quantity sum; Frequency according to the fan frequency converter of the deviation variable frequency adjustment air-conditioning unit of actual air volume sum and demand air quantity sum makes the actual air volume sum reach demand air quantity sum to satisfy the variation of system's air output demand.
These three kinds of control methods all have its pluses and minuses, and constant static-pressure control method and system are because control is with clearly defined objective, so control method is simple and reliable, but air conditioner load the valve of hour air quantity variable end device be in less aperture, so system's operation is not energy-conservation; It is energy-conservation that conventional change static pressure control method and system keep air quantity variable end device to be beneficial in larger opening as far as possible; But control strategy is only known change direction; No objectives value can't change according to valve position rapidly and change the blower fan revolution, so complicated, the less stable of system's control; Total blast volume control method and system's control target are frequency conversion fans, but the air-valve of air quantity variable end device is also regulated the change air quantity simultaneously, and the drag characteristic of system changes greatly, and control is unstable.
Summary of the invention
In order to overcome disadvantages of background technology, the object of the present invention is to provide a kind of change static pressure control method of a kind of air conditioning system with variable of can be energy-conservation, again can reliable and stable operation.
The technical scheme that the present invention adopts is:
After air conditioning system with variable starts, the quantity N of system controller real-time statistics operate as normal VAV
0, and the quantity N of 100% valve opening VAV wherein
hGather the valve opening of each operate as normal VAV in real time, and calculate actual average valve opening V
1The average valve opening V of established standards
2Quantity N with standard 100% valve opening VAV
bWork as V
1>=V
2The time, if N
h>=N
b, system controller increases the blower fan frequency, until N
h＜N
bIf N
h＜N
b, system controller is kept current blower fan frequency; Work as V
1＜V
2The time, if N
h>=N
bThe time, system controller increases the blower fan frequency, until N
h＜N
bIf N
h＜N
b, system controller reduces the blower fan frequency, until V
1Reach V
2
The beneficial effect that the present invention has is:
System of the present invention control is with clearly defined objective, promptly according to actual average valve opening V
1With the average valve opening V of setting
2Comparison, variable frequency adjustment blower fan frequency, therefore control is reliable and stable; Simultaneously through setting higher V
2The operation of assurance air conditioner system energy saving; In addition, because the prerequisite of air conditioner system energy saving is preferentially to satisfy the demand in unfavorable room, so robot control system(RCS) is gathered the quantity N of 100% valve opening VAV in real time
h, and with the quantity N of standard 100% valve opening VAV
bRelatively, increase or keep the blower fan frequency, to satisfy the air quantity demand of least favorable VAV.
Description of drawings
Fig. 1 is a system architecture diagram of the present invention.
Fig. 2 is the control flow chart of system of the present invention.
Among Fig. 1: 1. air quantity variable end device (being called for short VAV in the literary composition), 2. air quantity variable end device (VAV) controller 3. has the air-conditioning unit of fan frequency converter, 4. system controller.
The specific embodiment
Below in conjunction with accompanying drawing and implementation method the present invention is done further description.
As shown in Figure 1; The present invention is made up of with several air quantity variable end devices (VAV) 1 an air-conditioning unit 3 that has fan frequency converter, and air quantity variable end device (VAV) controller 2 and a system controller control 4 that each air quantity variable end device (VAV) 1 is equipped with are separately formed.
Control method of the present invention is:
As shown in Figure 2, after air conditioning system with variable starts, the quantity N of system controller real-time statistics operate as normal VAV
0, and the quantity N of 100% valve opening VAV wherein
hWhen load variations, the valve opening of VAV changes and changes the demand that the room air output satisfies the indoor load variation, and generally speaking, the valve opening increase means that the demand air quantity increases, and the valve opening minimizing means that the demand air quantity reduces.System controller is gathered the valve opening of each operate as normal VAV in real time, and calculates actual average valve opening V
1Simultaneously, the average valve opening V of system controller established standards
2Quantity N with standard 100% valve opening VAV
b, V
2Can set through field condition, as setting higher value as 85%, N
bAlso can set, as set 2 through system situation.
Work as V
1>=V
2The time, showing that VAV is in bigger valve opening, at this moment energy saving in running also need judge N
hWith N
bRelation.If N
h>=N
bAlthough the actual average valve opening of this moment has reached setting value, because the quantity N of 100% valve opening VAV
hSurpass setting value, therefore do not satisfy the air quantity demand of these VAV, so system controller improves current blower fan frequency, target is N
h＜N
bIf N
h＜N
b, show average valve opening V
1Quantity N with 100% valve opening VAV
hAll be in proper level, so system controller is kept current blower fan frequency.
Work as V
1＜V
2The time, show that VAV is in less valve opening, move not energy-conservation.At this moment also need judge N
hWith N
bRelation.If N
h>=N
bAlthough the actual average valve opening of this moment has and reduces the demand that the blower fan frequency improves valve opening less than setting value, because the quantity N of 100% valve opening VAV
bSurpass setting value, therefore do not satisfy the air quantity demand of these VAV, so system controller still improves current blower fan frequency, target is N
h＜N
bIf N
h＜N
b, show the quantity N of 100% valve opening VAV
hBe in proper level, but average valve opening is lower than setting value, so system controller reduces current blower fan frequency, target is V
1Reach V
2
For guaranteeing system's operation stability, each blower fan frequency is all kept the operation regular hour, and this time can according to circumstances be set at the scene, and as 5 minutes, system got into next circulation again.
Exemplifying embodiment:
Air conditioning system with variable starts, blower fan initial launch frequency 45Hz.
Operating mode 1:
Statistics N
0=10, N
h=8; Calculate V
1=95%; Set V
2=85%, N
b=2; Current frequency 45Hz.V
1>=V
2, N
h>=N
b, improve the blower fan frequency, like 47Hz, make N
h＜N
b
By this frequency operation certain hour,, get into next circulation as 5 minutes.
Operating mode 2:
Statistics N
0=10, N
h=5; Calculate V
1=90%; Set V
2=85%, N
b=2; Current frequency 47Hz.V
1>=V
2, N
h>=N
b, improve the blower fan frequency, like 48Hz, make N
h＜N
b
By this frequency operation certain hour,, promptly 25 minutes, get into next circulation like 5 circulations.
Operating mode 3:
Statistics N
0=10, N
h=1; Calculate V
1=85%; Set V
2=85%, N
b=2; Current frequency 48Hz.V
1>=V
2, N
h＜N
b, keep current blower fan frequency, i.e. 48Hz;
By this frequency operation certain hour,, promptly 25 minutes, get into next circulation like 5 circulations.
Operating mode 4:
Statistics N
0=10, N
h=0; Calculate V
1=75%; Set V
2=85%, N
b=2; Current frequency 48Hz.V
1＜V
2, N
h＜N
b, reduce current blower fan frequency such as 46Hz, make V
1Reach V
2
By this frequency operation certain hour,, promptly 25 minutes, get into next circulation like 5 circulations.
Operating mode 5:
Statistics N
0=10, N
h=2; Calculate V
1=80%; Set V
2=85%, N
b=2; Current frequency 48Hz.V
1＜V
2, N
h>=N
b, improve current blower fan frequency such as 47Hz, make N
h＜N
b
Parameter in the above operating mode: N
0Quantity for system controller real-time statistics operate as normal VAV; N
hBe the quantity of 100% valve opening VAV; N
bQuantity for standard 100% valve opening VAV; V
1Be the actual average valve opening; V
2Be the average valve opening of established standards.
Claims (1)
1. the change static pressure control method of an air conditioning system with variable is characterized in that its control method is: after air conditioning system with variable starts, and the quantity N of system controller real-time statistics operate as normal VAV
0, and the quantity N of 100% valve opening VAV wherein
hGather the valve opening of each operate as normal VAV in real time, and calculate actual average valve opening V
1The average valve opening V of established standards
2Quantity N with standard 100% valve opening VAV
bWork as V
1>=V
2The time, if N
h>=N
b, system controller increases the blower fan frequency, until N
h＜N
bIf N
h＜N
b, system controller is kept current blower fan frequency; Work as V
1＜V
2The time, if N
h>=N
bThe time, system controller increases the blower fan frequency, until N
h＜N
bIf N
h＜N
b, system controller reduces the blower fan frequency, until V
1Reach V
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010508816A CN101975434B (en) | 2010-10-15 | 2010-10-15 | Variable static pressure control method for variable air volume air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010508816A CN101975434B (en) | 2010-10-15 | 2010-10-15 | Variable static pressure control method for variable air volume air conditioning system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101975434A CN101975434A (en) | 2011-02-16 |
| CN101975434B true CN101975434B (en) | 2012-08-29 |
Family
ID=43575338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010508816A Active CN101975434B (en) | 2010-10-15 | 2010-10-15 | Variable static pressure control method for variable air volume air conditioning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101975434B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968500B (en) * | 2013-02-04 | 2016-04-13 | 珠海格力电器股份有限公司 | Air-conditioner air quantity static pressure curve processing method and air-conditioner |
| CN103438508B (en) * | 2013-08-27 | 2016-02-10 | 上海理工大学 | Variable air delivery through floor air-supply end system and air quantity control method thereof |
| CN104566775B (en) * | 2013-10-28 | 2018-10-16 | 珠海格力电器股份有限公司 | Air conditioning system with variable and control method |
| CN104850679B (en) * | 2015-04-03 | 2018-05-08 | 浙江工业大学 | The method of air conditioning system with variable fan static pressure control based on iterative learning |
| CN106123254B (en) * | 2016-08-31 | 2018-11-13 | 中国建筑设计咨询有限公司 | A kind of energy-saving control method of heating ventilation air-conditioning system wind turbine or water pump |
| CN108168031B (en) * | 2017-12-21 | 2020-01-24 | 北京工业大学 | Fine-tuning response ventilation air conditioner control method based on air valve position resetting static pressure value |
| CN109751733A (en) * | 2019-01-08 | 2019-05-14 | 深圳大学 | A kind of fault-tolerant air-supply static pressure setting method and device based on air conditioning system with variable |
| CN111256338A (en) * | 2020-01-19 | 2020-06-09 | 深圳市奥宇节能技术股份有限公司 | Control method for air supply fan of variable air volume air conditioning system |
| CN116678079B (en) * | 2023-05-29 | 2024-01-30 | 广东普而通科技有限公司 | Variable air volume air conditioner working condition analysis evaluation and optimization algorithm |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002357356A (en) * | 2001-06-04 | 2002-12-13 | Hitachi Plant Eng & Constr Co Ltd | Air conditioning control method |
| CN101008519A (en) * | 2007-01-29 | 2007-08-01 | 杭州华电华源环境工程有限公司 | Variable static pressure control method and system for variable air-conditioning system |
| CN101303153A (en) * | 2008-06-30 | 2008-11-12 | 湖南大学 | Air quantity changeable air conditioner system air blast static pressure optimizing control method and apparatus |
| CN201297737Y (en) * | 2008-11-04 | 2009-08-26 | 杭州华源人工环境工程有限公司 | Variable static pressure control system of variable air volume air-conditioning system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060116067A1 (en) * | 2004-12-01 | 2006-06-01 | Federspiel Clifford C | Method and apparatus for determining critical pressure of variable air volume heating, ventilating, and air-conditioning systems |
| US20080139105A1 (en) * | 2006-12-06 | 2008-06-12 | Mcquay International | Duct static pressure control |
-
2010
- 2010-10-15 CN CN201010508816A patent/CN101975434B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002357356A (en) * | 2001-06-04 | 2002-12-13 | Hitachi Plant Eng & Constr Co Ltd | Air conditioning control method |
| CN101008519A (en) * | 2007-01-29 | 2007-08-01 | 杭州华电华源环境工程有限公司 | Variable static pressure control method and system for variable air-conditioning system |
| CN101303153A (en) * | 2008-06-30 | 2008-11-12 | 湖南大学 | Air quantity changeable air conditioner system air blast static pressure optimizing control method and apparatus |
| CN201297737Y (en) * | 2008-11-04 | 2009-08-26 | 杭州华源人工环境工程有限公司 | Variable static pressure control system of variable air volume air-conditioning system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101975434A (en) | 2011-02-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101975434B (en) | Variable static pressure control method for variable air volume air conditioning system | |
| CN101008519A (en) | Variable static pressure control method and system for variable air-conditioning system | |
| CN106705353B (en) | Control method of multi-split air conditioner | |
| CN106545956B (en) | The control method and device of new blower | |
| CN109751741B (en) | Control method and device for air duct type air conditioner and air duct type air conditioner | |
| CN105352109B (en) | VAV box temperature control system and method based on weather compensation | |
| CN201297737Y (en) | Variable static pressure control system of variable air volume air-conditioning system | |
| CN103438508B (en) | Variable air delivery through floor air-supply end system and air quantity control method thereof | |
| CN103528144A (en) | Fresh air variable air rate energy saving method and device based on absolute humidity control | |
| CN105020845A (en) | Linkage energy-saving control system and method for air conditioning system | |
| CN105091217A (en) | Intelligent control method for air conditioner | |
| CN108168031B (en) | Fine-tuning response ventilation air conditioner control method based on air valve position resetting static pressure value | |
| CN103047737A (en) | Air supply temperature control method of variable air quantity air conditioning system | |
| CN207073915U (en) | Multizone gas concentration lwevel and air conditioner fresh air centralized control system | |
| CN107917512B (en) | Control method and device of air conditioning system and air conditioner | |
| WO2019227851A1 (en) | Water-system air conditioner control method | |
| CN109990445B (en) | Energy-saving controller and method for variable air volume air conditioning system | |
| CN104896667A (en) | Air conditioner and control method thereof | |
| CN204513695U (en) | A kind of temperature difference electric control valve of air-conditioning system | |
| CN103471205A (en) | Method for regulating indoor temperature and dual-temperature control valve | |
| CN102393058B (en) | End control system for air conditioning systems | |
| CN105157177A (en) | Method for controlling cooling tower outlet water temperature according to outdoor air state | |
| CN209801723U (en) | Digital variable air volume device | |
| CN205066026U (en) | Ventilation system's energy -conserving thalposis control system | |
| CN107906682B (en) | Control method and device of air conditioning system and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Hangzhou City, Zhejiang province 310030 West Lake science and Technology Economic Zone Road No. 10 Patentee after: Hangzhou Polytron Technologies Inc Address before: Hangzhou City, Zhejiang province 310030 West Lake science and Technology Economic Zone Road No. 10 Patentee before: Hangzhou Runpaq Environmental Technology Co., Ltd. |