CN107543282A - A kind of VAV variable air volume systems constant static-pressure and total blast volume double control strategy - Google Patents
A kind of VAV variable air volume systems constant static-pressure and total blast volume double control strategy Download PDFInfo
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- CN107543282A CN107543282A CN201710689940.XA CN201710689940A CN107543282A CN 107543282 A CN107543282 A CN 107543282A CN 201710689940 A CN201710689940 A CN 201710689940A CN 107543282 A CN107543282 A CN 107543282A
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Abstract
A kind of VAV variable air volume systems constant static-pressure proposed by the present invention and total blast volume double control strategy, exactly the simple and reliable of constant static-pressure is intuitively combined with the advanced of total blast volume, the constant static-pressure value of constant static-pressure method is constantly corrected by total blast volume method, certain adjustable range is made it have and obtains corresponding energy-saving effect.Including the rotating speed f that will be calculated by total blast volume method1Initial speed is arranged to, first is completed and controls again；And according to constant static-pressure value PjInitial speed is corrected, second is completed and controls again.The present invention is simple and reliable, advanced directly perceived, comfortable energy-conservation.
Description
Technical field
The present invention relates to a kind of central air-conditioning amount control method, more particularly to a kind of VAV variable air volume systems constant static-pressure with
Total blast volume double control strategy.
Background technology
Variable air volume system air quantity control method is one of key technique for determining the operation of its system success.Now by
Think that more traditional method has constant static-pressure method control strategy and constant static-pressure method control strategy.So-called constant static-pressure method, it is to be in air-supply
The appropriate location (often at from blower fan 2/3) of net under the overall leadership sets static pressure transducer, on the premise of this static pressure certain value is kept,
Change the air output of air-conditioning system by adjusting blower fan by electric frequency.So-called constant static-pressure method, it is exactly to keep each vav terminal
Valve be full of between 85%-100%, even if valve standard-sized sheet as far as possible and making the premise that static pressure reduces as far as possible in airduct
Under, change the air output of air-conditioning system by adjusting blower fan by electric frequency.Wind pushing temperature caused by Static pressure reset control method is inclined
It is low, comfortable effect is influenceed, system response speed is slow, and communication speed is low.
The content of the invention
Based on technical problem existing for background technology, the present invention proposes a kind of VAV variable air volume systems constant static-pressure and total wind
Measure double control strategy.
A kind of VAV variable air volume systems constant static-pressure proposed by the present invention and total blast volume double control strategy, are exactly by constant static-pressure
It is simple and reliable be intuitively combined with the advanced of total blast volume, the constant static-pressure value of constant static-pressure method is constantly corrected by total blast volume method,
Make it have certain adjustable range and obtain corresponding energy-saving effect.Including the rotating speed f that will be calculated by total blast volume method1If
Initial speed is set to, first is completed and controls again；And according to constant static-pressure value PjInitial speed is corrected, second is completed and controls again.
Preferably, rotating speed f is predicted0It is set as 50Hz.
Preferably, amendment rotating speed △ f are determined using following rule,
During (∑ Gi_demand- ∑ Gi_run)/∑ Gi_run ＞ 1%, Δ f1=1；
During -1%≤(∑ Gi_demand- ∑ Gi_run)/∑ Gi_run≤1%, Δ f1=0；
During (∑ Gi_demand- ∑ Gi_run)/∑ Gi_run ＜ -1%, Δ f1=-1.
Wherein, ∑ Gi_run represents the airflow value of air-conditioning box corresponding certain blower fan frequency in end air-valve standard-sized sheet, ∑
Gi_demand represents the requirements of user's total blast volume.
Preferably, prediction rotating speed △ f are determined using valve position method2, the valve of described air conditioning system with variable end wind pushing box
Position open degree feedback value is respectively set as -1,0 and 1.
When：When average valve position is less than or equal to 85%, aperture deficiency, Δ f2=-1；
When：When average valve position is more than 85% less than or equal to 95%, aperture is suitable, Δ f2=0；
When：When average valve position is more than 95%, aperture is full up, Δ f2=1.
The present invention is simple and reliable, advanced directly perceived；With energy-saving effect.
Brief description of the drawings
Fig. 1 is VAV variable air volume systems constant static-pressure of the present invention and the control principle drawing of total blast volume double control strategy；
In figure：1VAV vav terminals, 2DDC direct digital controllers, 3INV frequency converters, 4 blower fans.
Embodiment
The present invention is made with reference to specific embodiment further to explain.
Reference picture 1, it can be seen that actual speed f=f1+Δf2, f1=f0+Δf1, actual speed f is determined, key exists
In how determining f0With Δ f1、Δf2.Wherein f0With Δ f1Determined by total air volume control method, △ f2Determined by CPC control method.
(1) rotating speed f is predicted0Determination：
Blower fan is started with maximum quantity of wind under normal circumstances, prediction rotating speed f0It is set as 50Hz.
(2) rotating speed △ f determination --- step length is corrected
From f0Determination can be seen that f0A simply coarse value, there is certain error and come in and go out.Therefore need to correct
Rotating speed △ f are constantly corrected.Then invention introduces optimal demand total blast volume ∑ Gi-demand concept, for
△ f theoretical expressions that are most direct and conveniently understanding are exactly to be controlled using step length.It is calculated as follows：
If：(∑ Gi-demand- ∑ Gi-run)/∑ Gi-run ＞ 1%
Then：△ f=1 f=f0+△f
If：- 1%≤(∑ Gi-demand- ∑ Gi-run)/∑ Gi-run≤1%
Then：△ f=0 f=f0+△f
If：(∑ Gi-demand- ∑ Gi-run)/∑ Gi-run ＜ -1%
Then：△ f=-1 f=f0+△f
(3)△f2Determination --- valve position method
When：When average valve position is less than or equal to 85%, aperture deficiency, Δ f2=-1；
When：When average valve position is more than 85% less than or equal to 95%, aperture is suitable, Δ f2=0；
When：When average valve position is more than 95%, aperture is full up, Δ f2=1.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (4)
1. a kind of VAV variable air volume systems constant static-pressure and total blast volume double control strategy, it is characterised in that by total blast volume method come not
The constant static-pressure value of disconnected amendment constant static-pressure method, including the rotating speed f that will be calculated by total blast volume method1Initial speed is arranged to, is completed
First controls again；And according to constant static-pressure value PjInitial speed is corrected, second is completed and controls again.
2. a kind of VAV variable air volume systems constant static-pressure according to claim 1 and total blast volume double control strategy, its feature exist
In prediction rotating speed f0It is set as 50Hz.
3. a kind of VAV variable air volume systems constant static-pressure according to claim 1 and total blast volume double control strategy, its feature exist
In, amendment rotating speed △ f are determined using following rule,
During (∑ Gi_demand- ∑ Gi_run)/∑ Gi_run ＞ 1%, Δ f1=1；
During -1%≤(∑ Gi_demand- ∑ Gi_run)/∑ Gi_run≤1%, Δ f1=0；
During (∑ Gi_demand- ∑ Gi_run)/∑ Gi_run ＜ -1%, Δ f1=-1,
Wherein, ∑ Gi_run represents the airflow value of air-conditioning box corresponding certain blower fan frequency in end air-valve standard-sized sheet, ∑ Gi_
Demand represents the requirements of user's total blast volume.
4. a kind of VAV variable air volume systems constant static-pressure according to claim 1 and total blast volume double control strategy, its feature exist
In using valve position method determination prediction rotating speed △ f2, the valve seat opening value of feedback of described air conditioning system with variable end wind pushing box
It is respectively set as -1,0 and 1.
When：When average valve position is less than or equal to 85%, aperture deficiency, Δ f2=-1；
When：When average valve position is more than 85% less than or equal to 95%, aperture is suitable, Δ f2=0；
When：When average valve position is more than 95%, aperture is full up, Δ f2=1.
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| CN201710689940.XA CN107543282A (en) | 2017-08-14 | 2017-08-14 | A kind of VAV variable air volume systems constant static-pressure and total blast volume double control strategy |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1854627A (en) * | 2005-04-18 | 2006-11-01 | 上海大智科技发展有限公司 | Pressure-variable and total-blast duplex controlling method for blast-variable air-conditioner system |
| CN1854625A (en) * | 2005-04-18 | 2006-11-01 | 上海大智科技发展有限公司 | Constant static-pressure and total-blast duplexing controlling method of blast-variable air-conditioner 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 |
| CN102353119A (en) * | 2011-08-09 | 2012-02-15 | 北京建筑工程学院 | Control method of VAV (variable air volume) air-conditioning system |
| KR20130117188A (en) * | 2012-04-18 | 2013-10-25 | 에스케이텔레콤 주식회사 | Method for managing energy using vav way and apparatus thereof |
-
2017
- 2017-08-14 CN CN201710689940.XA patent/CN107543282A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1854627A (en) * | 2005-04-18 | 2006-11-01 | 上海大智科技发展有限公司 | Pressure-variable and total-blast duplex controlling method for blast-variable air-conditioner system |
| CN1854625A (en) * | 2005-04-18 | 2006-11-01 | 上海大智科技发展有限公司 | Constant static-pressure and total-blast duplexing controlling method of blast-variable air-conditioner 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 |
| CN102353119A (en) * | 2011-08-09 | 2012-02-15 | 北京建筑工程学院 | Control method of VAV (variable air volume) air-conditioning system |
| KR20130117188A (en) * | 2012-04-18 | 2013-10-25 | 에스케이텔레콤 주식회사 | Method for managing energy using vav way and apparatus thereof |
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Effective date of registration: 20190828 Address after: Room 301-11, Block D, 80 Dongfeng Road, Yuelin Street, Fenghua District, Ningbo City, Zhejiang Province Applicant after: Ningbo Xueluden Intelligent Technology Co., Ltd. Address before: 215500 South East Avenue 333 901, Changshu High-tech Industrial Development Zone, Suzhou City, Jiangsu Province Applicant before: Suzhou AI Jeter Environmental Technology Co Ltd |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180105 |