CN201297737Y - Variable static pressure control system of variable air volume air-conditioning system - Google Patents
Variable static pressure control system of variable air volume air-conditioning system Download PDFInfo
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- CN201297737Y CN201297737Y CNU2008201673070U CN200820167307U CN201297737Y CN 201297737 Y CN201297737 Y CN 201297737Y CN U2008201673070 U CNU2008201673070 U CN U2008201673070U CN 200820167307 U CN200820167307 U CN 200820167307U CN 201297737 Y CN201297737 Y CN 201297737Y
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Abstract
The utility model discloses a variable static pressure control system of a variable air volume air-conditioning system. The variable static pressure control system comprises a plurality of variable air volume terminal devices connected in parallel on an air supply pipe of an air-conditioning unit with a fan frequency converter; a static pressure sensor of an air pipe is arranged on the air supply pipe; the static pressure sensor of the air pipe is connected at an input terminal of a controller; the output terminal of the controller is connected with the fan frequency converter of the air-conditioning unit; the variable air volume terminal devices adopt the variable air volume terminal devices with valve position feedback; and the variable air volume terminal devices with valve position feedback are connected in parallel and then are connected with the other input terminal of the controller. The utility model adjusts the frequency of an air blower according to the static pressure of the air supply pipe, so that the control of the system is reliable and stable; meanwhile, when the variable static pressure control system is partially loaded, the set values of static pressure of the system can be reduced according to valve position signals of the variable air volume terminal devices, and the energy-saving operation is realized, therefore, the system provided by the utility model is a mode and a system of static pressure control, which combines the stability with the energy conservation.
Description
Technical field
The utility model relates to air conditioning and ventilation field, particularly relates to a kind of variable static pressure control system of air conditioning system with variable.
Background technology
Air conditioning system with variable is a kind of by changing the all-air conditioning system that air output satisfies the indoor load variation.This system has good energy-conservation 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 total 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 dual mode: a kind of is constant static-pressure control, the robot control system(RCS) of this control mode is mainly by the air quantity variable end device 1 that does not have feedback, airduct static pressure transducer 2, the air-conditioning unit 3 and the controller 4 that have fan frequency converter are formed, as shown in Figure 1, its operation principle is (to be generally from air-conditioning unit 2/3 position) at the airduct place airduct static pressure transducer 2 is set, air quantity variable end device 1 changes air output by controlling opening of valve when load variations, valve opening changes and causes that the airduct static pressure changes, the controller 4 of robot control system(RCS) is according to setting the frequency of static pressure with the fan frequency converter of the deviation variable frequency adjustment air-conditioning unit 3 of actual measurement static pressure, make the static pressure measured value be stabilized in setting value, to satisfy the variation of system's air output demand.Another kind is to become static pressure control, this control mode robot control system(RCS) is mainly by the air quantity variable end device 5 of being with valve position feedback, the air-conditioning unit 3 and the controller 4 that have fan frequency converter are formed, as shown in Figure 2, its operation principle is that the air quantity variable end device 5 of band valve position feedback when load variations changes air output by controlling opening of valve, the controller 4 of robot control system(RCS) is gathered the valve position signal of each air quantity variable end device 5 in real time simultaneously, and comprehensively judge, by each valve position signal is added up, when reaching maximum opening if any the valve area of an air quantity variable end device 5, expression air-conditioning unit pressure fan frequency need improve; When the valve area of all air quantity variable end devices 5 during all in minimum aperture, expression air-conditioning unit pressure fan frequency need reduce; When having at least the valve area of an air quantity variable end device to remain between maximum opening and the minimum aperture, current air-conditioning unit pressure fan frequency is kept in expression.
These two kinds of control modes all have its pluses and minuses, constant static-pressure control mode and system are because control is with clearly defined objective, therefore control mode is simple and reliable, but setting static pressure in this control mode remains unchanged in the whole service process, and air conditioner load the valve of hour air quantity variable end device be in less aperture, therefore system's air-valve restriction loss is big, moves not energy-conservation; Become no matter air conditioner load size of static pressure control method and system, keep air quantity variable end device at larger opening and reduction ajutage static pressure as far as possible, therefore be beneficial to energy-conservation, but need only a valve position signal mistake in the system and just may cause the whole system collapse, and each valve position causes system's concussion, instability in real-time change in the system, so complicated, the less stable of system's control.
Summary of the invention
In order to overcome disadvantages of background technology, the purpose of this utility model provides can be energy-conservation, the variable static pressure control system of a kind of air conditioning system with variable that again can reliable and stable operation.
The technical scheme that its technical problem of solution of the present utility model is adopted is:
Comprise a plurality of air quantity variable end devices in parallel on the ajutage of the air-conditioning unit that has fan frequency converter, an airduct static pressure transducer is set on ajutage; The airduct static pressure transducer is connected with an input of controller, and the output of controller is connected with the fan frequency converter of air-conditioning unit; It is characterized in that: described air quantity variable end device is connected with another input of controller after the air quantity variable end device parallel connection of a plurality of band valve position feedback for the air quantity variable end device of band valve position feedback.
The described air-conditioning unit that has fan frequency converter has plural ajutage branch, and an airduct static pressure transducer all is set in each ajutage branch, and each airduct static pressure transducer is connected with the input of controller.
Adopt the air quantity variable end device of band valve position feedback, and the airduct static pressure transducer is set at the ajutage place, air quantity variable end device changes air output by controlling opening of valve when load variations, the controller of robot control system(RCS) is according to the frequency of initial static pressure setting value with the fan frequency converter of the deviation variable frequency adjustment air-conditioning unit of static pressure measured value, make the static pressure measured value be stabilized in setting value, to satisfy the variation of system's air output demand; Simultaneously, the controller of robot control system(RCS) is gathered the valve position signal of each air quantity variable end device in real time, and comprehensively judge, automatically adjust initial static pressure setting value, make system's static pressure under the situation that satisfies each air quantity variable end device demand, reduce the ajutage static pressure, thereby satisfy the needs of energy saving of system operation.
Air conditioning system with variable is provided with a plurality of airduct static pressure transducers, is the control foundation through selecting one of them sensor.
The utility model is compared with background technology, and the beneficial effect that has is:
Therefore, after the utility model had adopted technique scheme, newly-increased investment was limited, but with clearly defined objective because of system's control, promptly regulated the pressure fan frequency according to the ajutage static pressure, therefore controlled reliable and stable; Can reduce the setting static pressure of system simultaneously according to the valve position signal of air quantity variable end device when sub-load, realize energy-saving run, therefore be a kind of take into account stable and energy-conservation static pressure control system.
Description of drawings
Fig. 1 is the constant static-pressure control system.
Fig. 2 becomes the static pressure control system.
Fig. 3 is a variable static pressure control system of the present utility model.
Fig. 4 is the variable static pressure control system of a plurality of static pressure transducers of the present utility model.
Among the figure: 1. do not have the air quantity variable end device of valve position feedback, 2. airduct static pressure transducer 3. has the air-conditioning unit of fan frequency converter, 4. controller, the 5. air quantity variable end device of band valve position feedback.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
As shown in Figure 3, the utility model comprises a plurality of air quantity variable end devices in parallel on the ajutage of the air-conditioning unit 3 that has fan frequency converter, and an airduct static pressure transducer 2 is set on ajutage; Airduct static pressure transducer 2 is connected with an input of controller 4, and the output of controller 4 is connected with the fan frequency converter of air-conditioning unit 3.Described air quantity variable end device is the air quantity variable end device 5 of band valve position feedback, and air quantity variable end device 5 backs in parallel of a plurality of band valve position feedback are connected with another input of controller 4.
As shown in Figure 4, the described air-conditioning unit 3 that has fan frequency converter has plural ajutage branch, and an airduct static pressure transducer 2 all is set in each ajutage branch, and each airduct static pressure transducer 2 is connected with the input of controller 4.
The air quantity variable end device 5 that has a plurality of band valve position feedback in parallel on the ajutage of air-conditioning unit 3 of fan frequency converter, an airduct static pressure transducer 2 is set on ajutage, this position is generally from air-conditioning unit 2/3 place, also can adjust according to the actual conditions of air-conditioning system; Air quantity variable end device 5 changes air output by controlling opening of valve when load variations, the controller 4 of robot control system(RCS) adopts the constant static-pressure control mode, promptly the initial static pressure setting value of basis makes the static pressure measured value be stabilized in setting value with the frequency of the fan frequency converter of the deviation variable frequency adjustment air-conditioning unit 3 of static pressure measured value, to satisfy the variation of system's air output demand; Simultaneously, the controller 4 of robot control system(RCS) again collection in real time respectively with the valve position signal of the air quantity variable end device 5 of valve position feedback, and comprehensively judge: when reaching maximum opening (as 95%) as the valve position as the air quantity variable end device 5 of one or several (can set) bands valve position feedback, the static pressure setting value adds static pressure deviation delta P (can set) on currency; When the valve position of the air quantity variable end device 5 of all or several (can set) band valve position feedback all when minimum aperture (as 70%) is following, static pressure sets value and subtract static pressure deviation delta P (can set) on currency.Generally speaking, establish when the initial static pressure of system setting value reaches maximum opening at the valve position of all air quantity variable end devices, the actual static pressure setting value when therefore moving is equal to or less than initial static pressure setting value.Therefore, adopt the utility model, robot control system(RCS) according to each respectively with the situation of the air quantity variable end device 5 of valve position feedback, automatically adjust the static pressure setting value, make system's static pressure under situation about satisfying respectively with air quantity variable end device 5 demands of valve position feedback, maintain lower level, thereby satisfy the needs of energy saving of system operation, as shown in Figure 3.
As further improvement of the utility model, have at the air-conditioning unit 3 that has fan frequency converter under the situation of a plurality of ajutage branch, an airduct static pressure transducer 2 all is set, and each airduct static pressure transducer 2 is connected with the input of controller 4 in each ajutage branch.The controller 4 of robot control system(RCS) compares the actual measurement static pressure of each airduct static pressure transducer 2, selects wherein to have peaked airduct static pressure transducer 2 as the control foundation, regulates fan frequency conversion, as shown in Figure 4.
Claims (2)
1, a kind of variable static pressure control system of air conditioning system with variable comprises a plurality of air quantity variable end devices in parallel on the ajutage of the air-conditioning unit (3) that has fan frequency converter, and an airduct static pressure transducer (2) is set on ajutage; Airduct static pressure transducer (2) is connected with an input of controller (4), and the output of controller (4) is connected with the fan frequency converter of air-conditioning unit (3); It is characterized in that: described air quantity variable end device is the air quantity variable end device (5) of band valve position feedback, and the air quantity variable end device of a plurality of band valve position feedback (5) back in parallel is connected with another input of controller (4).
2, the variable static pressure control system of a kind of air conditioning system with variable according to claim 1, it is characterized in that: the described air-conditioning unit (3) that has fan frequency converter has plural ajutage branch, an airduct static pressure transducer (2) all is set in each ajutage branch, and each airduct static pressure transducer (2) is connected with the input of controller (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201673070U CN201297737Y (en) | 2008-11-04 | 2008-11-04 | Variable static pressure control system of variable air volume air-conditioning system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201673070U CN201297737Y (en) | 2008-11-04 | 2008-11-04 | Variable static pressure control system of variable air volume air-conditioning system |
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| CN201297737Y true CN201297737Y (en) | 2009-08-26 |
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| CNU2008201673070U Expired - Fee Related CN201297737Y (en) | 2008-11-04 | 2008-11-04 | Variable static pressure control system of variable air volume air-conditioning system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975434A (en) * | 2010-10-15 | 2011-02-16 | 杭州源牌环境科技有限公司 | Variable static pressure control method for variable air volume air conditioning system |
| CN102466299A (en) * | 2010-11-16 | 2012-05-23 | 珠海格力电器股份有限公司 | Air duct machine system and control system thereof |
| CN103438508A (en) * | 2013-08-27 | 2013-12-11 | 上海理工大学 | Variable air rate underfloor air distribution tail end system and method for controlling air volume of variable air rate underfloor air distribution tail end system |
| CN104791965A (en) * | 2015-03-26 | 2015-07-22 | 上海大众祥源动力供应有限公司 | Blast-capacity-variable energy-saving type central air-conditioning system |
| CN111023421A (en) * | 2019-12-27 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Static pressure self-adjustment control method and device and air conditioner |
| CN111306734A (en) * | 2020-02-21 | 2020-06-19 | 中国人民解放***箭军工程设计研究院 | Variable air volume control system, control method thereof, control device thereof, and storage medium |
| CN113446684A (en) * | 2021-06-30 | 2021-09-28 | 广州地铁设计研究院股份有限公司 | Intelligent air conditioner for public area of subway station |
| CN113446683A (en) * | 2021-06-30 | 2021-09-28 | 广州地铁设计研究院股份有限公司 | Intelligent room air conditioner for subway station equipment and management |
-
2008
- 2008-11-04 CN CNU2008201673070U patent/CN201297737Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975434A (en) * | 2010-10-15 | 2011-02-16 | 杭州源牌环境科技有限公司 | Variable static pressure control method for variable air volume air conditioning system |
| CN101975434B (en) * | 2010-10-15 | 2012-08-29 | 杭州源牌环境科技有限公司 | Variable static pressure control method for variable air volume air conditioning system |
| CN102466299A (en) * | 2010-11-16 | 2012-05-23 | 珠海格力电器股份有限公司 | Air duct machine system and control system thereof |
| CN103438508A (en) * | 2013-08-27 | 2013-12-11 | 上海理工大学 | Variable air rate underfloor air distribution tail end system and method for controlling air volume of variable air rate underfloor air distribution tail end system |
| 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 |
| CN104791965A (en) * | 2015-03-26 | 2015-07-22 | 上海大众祥源动力供应有限公司 | Blast-capacity-variable energy-saving type central air-conditioning system |
| CN111023421A (en) * | 2019-12-27 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Static pressure self-adjustment control method and device and air conditioner |
| CN111306734A (en) * | 2020-02-21 | 2020-06-19 | 中国人民解放***箭军工程设计研究院 | Variable air volume control system, control method thereof, control device thereof, and storage medium |
| CN113446684A (en) * | 2021-06-30 | 2021-09-28 | 广州地铁设计研究院股份有限公司 | Intelligent air conditioner for public area of subway station |
| CN113446683A (en) * | 2021-06-30 | 2021-09-28 | 广州地铁设计研究院股份有限公司 | Intelligent room air conditioner for subway station equipment and management |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090826 Termination date: 20101104 |