CN104791965A - Blast-capacity-variable energy-saving type central air-conditioning system - Google Patents
Blast-capacity-variable energy-saving type central air-conditioning system Download PDFInfo
- Publication number
- CN104791965A CN104791965A CN201510136827.XA CN201510136827A CN104791965A CN 104791965 A CN104791965 A CN 104791965A CN 201510136827 A CN201510136827 A CN 201510136827A CN 104791965 A CN104791965 A CN 104791965A
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- China
- Prior art keywords
- pressure fan
- variable air
- air
- variable
- conditioning system
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Classifications
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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
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to a blast-capacity-variable energy-saving type central air-conditioning system. The blast-capacity-variable energy-saving type central air-conditioning system comprises a main air feeder, air feeding pipes, at least two blast-capacity-variable air feeders, a temperature sensor, a frequency converter and a controller. The controller is connected with the temperature sensor, the frequency converter and the blast-capacity-variable air feeders. The frequency converter is connected with the main air feeder. The main air feeder is connected with the blast-capacity-variable air feeders through the air feeding pipes. Compared with the prior art, the blast-capacity-variable energy-saving type central air-conditioning system has the advantages of being good in flexibility, saving energy, reducing emission, being high in reliability and the like.
Description
Technical field
The present invention relates to a kind of central air conditioner system, especially relate to a kind of energy-saving central air conditioning system of variable air quantity.
Background technology
The increasing of the environmental pressure brought along with anxiety and the global warming of world energy sources resource, economize energy, protection of the environment has become the very important significant problem in countries in the world.The energy consumption of central air conditioner system occupies the over half of building energy consumption, and wherein the energy consumption of the equipment such as blower fan occupies greatly.
The control method of blower fan was when blower fan revolution is constant in the past, by the aperture size of the throttling arrangements such as the valve in change system, increase and decrease the official website pressure loss and flow is changed, because characteristic curve of fan does not change, only change the position of system condition point, so do not have energy-conserving action.
Summary of the invention
Object of the present invention be exactly provide that a kind of flexibility is good to overcome defect that above-mentioned prior art exists, energy-saving and emission-reduction, variable air quantity that reliability is high energy-saving central air conditioning system.
Object of the present invention can be achieved through the following technical solutions:
A kind of energy-saving central air conditioning system of variable air quantity, it is characterized in that, comprise total pressure fan, air supply duct, at least two variable air rate pressure fan, temperature sensor, frequency converter and controllers, described controller is connected with temperature sensor, frequency converter, variable air rate pressure fan respectively, described frequency converter is connected with total pressure fan, and described total pressure fan is connected with each variable air rate pressure fan respectively by air supply duct.
Described variable air rate pressure fan is provided with the air velocity transducer and air quantity adjusting mechanism that are connected with controller respectively.
Described variable air rate pressure fan sets air quantity by the difference of setting value at room temperature and indoor temperature measurement value, and its difference is directly proportional to air quantity.
Described variable air rate pressure fan is provided with five.
Distance and total pressure fan variable air rate pressure fan aperture is nearby little, and distance is large with total pressure fan variable air rate pressure fan aperture at a distance.
Described controller is DDC controller.
Compared with prior art, the present invention has the following advantages:
1, flexibility is good, by arranging the pressure fan of multiple variable air quantity, accurately controlling according to the different temperature difference and diverse location to it, substantially increasing the effect of system, simultaneously more flexible;
2, energy-saving and emission-reduction, owing to environmentally carrying out control different in real time, adopt VFC mode simultaneously, save much electricity;
3, reliability is high, and motor is owing to also extending the running life that underspeeds.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of variable air rate pressure fan of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
As illustrated in fig. 1 and 2, a kind of energy-saving central air conditioning system of variable air quantity, comprise total pressure fan 4, air supply duct, at least two variable air rate pressure fan 5, temperature sensor 3, frequency converter 2 and controllers 1, described controller 1 is connected with temperature sensor 3, frequency converter 2, variable air rate pressure fan 5 respectively, described frequency converter 2 is connected with total pressure fan 4, and described total pressure fan 4 is connected with each variable air rate pressure fan 5 respectively by air supply duct.
Described variable air rate pressure fan 5 is provided with the air velocity transducer 51 and air quantity adjusting mechanism 52 that are connected with controller respectively.Described variable air rate pressure fan 5 sets air quantity by the difference of setting value at room temperature and indoor temperature measurement value, and its difference is directly proportional to air quantity.Described variable air rate pressure fan 5 is provided with five.Distance and total pressure fan variable air rate pressure fan aperture is nearby little, and distance is large with total pressure fan variable air rate pressure fan aperture at a distance.Described controller 1 is DDC controller.
Change the characteristic curve of blower fan, by the rotating speed of blower fan, can adopt this control method, the characteristic curve of pipe network does not change, and only changes operating point position.
Variable air rate pressure fan control procedure is: wind pushing temperature is set to certain definite value, compares with the temperature sensor measurement signal being arranged on each variable air rate pressure fan, increases or reduces air quantity, regulates indoor temperature to be tending towards setting value.
Power is directly proportional to 3 powers of rotating speed as can be seen here, as long as rotating speed declines, the words power of any can decline greatly.
The variable air rate pressure fan unit and the variable air rate pressure fan far away that arrange near total pressure fan, because the impact air quantity under identical aperture condition by pipe resistance is not identical.In order to address this problem, variable air rate pressure fan arrange air velocity transducer, control windscreen aperture according to air velocity transducer signal.Even if the temperature difference that this control mode is identical, the less position of aperture is operated in apart from total pressure fan variable air rate pressure fan nearby, and variable air rate pressure fan far away operates in the larger position of aperture, so would not go wrong because of the position relationship between total pressure fan and variable air rate pressure fan.
2. based on the serials control of the air quantity setting value of temperature difference
Air quantity is regulated to obtain the indoor temperature set.Method is that the deviation of setting value at room temperature and measured value is converted into air quantity setting value, then controls windscreen with air quantity adjusting mechanism.This method obtains serials control based on the air quantity setting value of temperature difference.
3. frequency converter rotating speed calculates
If variable air rate pressure fan is with comparatively small guide vane operation, so, the air quantity that preferably total pressure fan blows out is requirement just.Because each variable air rate pressure fan independence measuring wind, so based on this configuration, calculates air quantity in each variable air rate pressure fan.Such as, when 5 variable air rate pressure fan blow with respective air quantity, the requirement air volume signal of each variable air rate pressure fan is sent in DDC obtains total blast volume, then except nominal air delivery, tries to achieve air quantity ratio (FR) and sets frequency converter rotating speed.
Claims (6)
1. the energy-saving central air conditioning system of a variable air quantity, it is characterized in that, comprise total pressure fan, air supply duct, at least two variable air rate pressure fan, temperature sensor, frequency converter and controllers, described controller is connected with temperature sensor, frequency converter, variable air rate pressure fan respectively, described frequency converter is connected with total pressure fan, and described total pressure fan is connected with each variable air rate pressure fan respectively by air supply duct.
2. the energy-saving central air conditioning system of a kind of variable air quantity according to claim 1, is characterized in that, described variable air rate pressure fan is provided with the air velocity transducer and air quantity adjusting mechanism that are connected with controller respectively.
3. the energy-saving central air conditioning system of a kind of variable air quantity according to claim 1, is characterized in that, described variable air rate pressure fan sets air quantity by the difference of setting value at room temperature and indoor temperature measurement value, and its difference is directly proportional to air quantity.
4. the energy-saving central air conditioning system of a kind of variable air quantity according to claim 1, is characterized in that, described variable air rate pressure fan is provided with five.
5. the energy-saving central air conditioning system of a kind of variable air quantity according to claim 1, is characterized in that, distance and total pressure fan variable air rate pressure fan aperture is nearby little, and distance is large with total pressure fan variable air rate pressure fan aperture at a distance.
6. the energy-saving central air conditioning system of a kind of variable air quantity according to claim 1, is characterized in that, described controller is DDC controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510136827.XA CN104791965A (en) | 2015-03-26 | 2015-03-26 | Blast-capacity-variable energy-saving type central air-conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510136827.XA CN104791965A (en) | 2015-03-26 | 2015-03-26 | Blast-capacity-variable energy-saving type central air-conditioning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104791965A true CN104791965A (en) | 2015-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510136827.XA Pending CN104791965A (en) | 2015-03-26 | 2015-03-26 | Blast-capacity-variable energy-saving type central air-conditioning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104791965A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109059217A (en) * | 2018-05-04 | 2018-12-21 | 中国中元国际工程有限公司 | A kind of air quantity-changeable air conditioning system employing total air quantity calculation control method based on operation curve |
| CN110579009A (en) * | 2019-09-18 | 2019-12-17 | 烟台市人和建设新技术发展有限公司 | Large-space air port range control method and system and air conditioning unit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4124998A (en) * | 1976-02-03 | 1978-11-14 | Canada Square Management Ltd. | Air conditioning systems for buildings |
| CN1262417A (en) * | 1999-07-06 | 2000-08-09 | 广东国得空调冷冻工业有限公司 | Multi-blower air conditioning system with variable wind flow |
| 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 |
| CN101806484A (en) * | 2010-04-06 | 2010-08-18 | 南京航空航天大学 | Variable air volume air-conditioner control system with variable frequency fan and digital air valve for adjusting tail end air volume and implementation method |
| CN202328615U (en) * | 2011-11-04 | 2012-07-11 | 重庆海润节能技术股份有限公司 | Variable-air-volume (VAV) ventilation control system |
| CN204555202U (en) * | 2015-03-26 | 2015-08-12 | 上海大众祥源动力供应有限公司 | The energy-saving central air conditioning system of variable air quantity |
-
2015
- 2015-03-26 CN CN201510136827.XA patent/CN104791965A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4124998A (en) * | 1976-02-03 | 1978-11-14 | Canada Square Management Ltd. | Air conditioning systems for buildings |
| CN1262417A (en) * | 1999-07-06 | 2000-08-09 | 广东国得空调冷冻工业有限公司 | Multi-blower air conditioning system with variable wind flow |
| 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 |
| CN101806484A (en) * | 2010-04-06 | 2010-08-18 | 南京航空航天大学 | Variable air volume air-conditioner control system with variable frequency fan and digital air valve for adjusting tail end air volume and implementation method |
| CN202328615U (en) * | 2011-11-04 | 2012-07-11 | 重庆海润节能技术股份有限公司 | Variable-air-volume (VAV) ventilation control system |
| CN204555202U (en) * | 2015-03-26 | 2015-08-12 | 上海大众祥源动力供应有限公司 | The energy-saving central air conditioning system of variable air quantity |
Non-Patent Citations (1)
| Title |
|---|
| 李玉街等: "《中央空调系统模糊控制节能技术及应用》", 31 January 2009, 中国建筑工业出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109059217A (en) * | 2018-05-04 | 2018-12-21 | 中国中元国际工程有限公司 | A kind of air quantity-changeable air conditioning system employing total air quantity calculation control method based on operation curve |
| CN109059217B (en) * | 2018-05-04 | 2021-09-28 | 中国中元国际工程有限公司 | Total air volume control method of variable air volume air conditioning system based on operation curve |
| CN110579009A (en) * | 2019-09-18 | 2019-12-17 | 烟台市人和建设新技术发展有限公司 | Large-space air port range control method and system and air conditioning unit |
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Application publication date: 20150722 |
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| RJ01 | Rejection of invention patent application after publication |