CN103574829A - Energy saving control method for air conditioning unit - Google Patents
Energy saving control method for air conditioning unit Download PDFInfo
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- CN103574829A CN103574829A CN201210248333.7A CN201210248333A CN103574829A CN 103574829 A CN103574829 A CN 103574829A CN 201210248333 A CN201210248333 A CN 201210248333A CN 103574829 A CN103574829 A CN 103574829A
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Abstract
The invention belongs to the energy saving control field of a central air conditioning system and discloses an energy saving control method for an air conditioning unit. The energy saving control method for the air conditioning unit comprises steps of (1) periodically collecting indoor actual temperature and humidity parameters with a time constant C1 of indoor temperature changes serving as a period, comparing the indoor actual temperature and humidity parameters and an indoor temperature and humidity set value and reasoning and computing required supply air temperature and quantity under a current requirement according to a comparing result; (2) controlling the fan rotating speed with an obtained supply air quantity set value serving as a target, directly working out the fan rotating speed, namely, the fan rotating speed is equal to K multiply the supply air set value, of the fan by ratio in consideration that generally, the supply air quantity and a fan frequency are in a remarkable linear relation and outputting to a frequency conversion fan; (3) controlling the air conditioning unit in a closed loop mode with a time constant C2 of a water valve device serving as a period and a supply air temperature set value serving as a target to obtain water valve opening. Compared with the prior art, the energy saving control method for the air conditioning unit has the advantages of enabling the fan and the water valve to be coordinately in decoupling control, welling satisfying indoor temperature and humidity requirements and being stable in control and good in comprehensive energy saving effect.
Description
Technical field
The invention belongs to system energy conservation control for central air-conditioning field, particularly a kind of energy-saving control method using in air-conditioning unit.
Background technology
The control of tradition air-conditioning unit is general direct controls adjustable amount with return air temperature, controls target and only has a return air temperature.And air-conditioning unit has water valve aperture and two adjustable amounts of rotation speed of fan, traditional control method cannot carry out the coordination decoupling zero of these two amounts simultaneously to be controlled, and conventionally adopts following two kinds of methods:
Rotation speed of fan is set to a definite value, and a water adjusting valve aperture, has so just caused the waste of fan energy consumption.With return air temperature, directly control water valve, due to the large time delay of return air temperature, time constant is very large simultaneously, and water valve control is comparatively quick, and time constant is less.The time constant of control object and regulated quantity is not mated, and causes controlling being difficult to reach stable, is easy to occur controlling the situation of concussion.
Another kind, from energy-conservation angle, preferentially regulates rotation speed of fan, keeps indoor temperature in setting value, keeps water valve all to open simultaneously.When rotation speed of fan is positioned at lower prescribing a time limit, water adjusting valve aperture keeps indoor temperature in setting value.This strategy has been saved fan energy consumption really to greatest extent, but the water valve lagging behind regulates, and probably causes wind pushing temperature on the low side, thereby make indoor too dry, water valve aperture is large simultaneously, and the conveying energy consumption of chilled water will increase, and is unfavorable for the synthesis energy saving of whole central air conditioner system.Meanwhile, when equipment is controlled, also the unmatched problem of while life period constant, controls the situation that also easily occurs concussion.
Summary of the invention
For above-mentioned the deficiencies in the prior art, the object of this invention is to provide a kind of energy-saving control method of air-conditioning unit.It can make the blower fan of air-conditioning unit and the two coordination decoupling zero of water valve control, and better meets indoor temperature and humidity demand, and air-conditioning unit control is simultaneously more stable, synthesis energy saving is effective.
In order to reach foregoing invention object, technical scheme of the present invention realizes as follows:
An energy-saving control method for air-conditioning unit, its method step is:
1) take room temperature transformation period constant C 1 is the cycle, the indoor actual humiture parameter of circle collection and indoor temperature and humidity setting value, and according to comparative result, required wind pushing temperature and air-supply value under the current demand of reasoning and calculation.
2) in the hope of air output setting value be target, control rotation speed of fan.Consider that general air output and blower fan frequency have obvious linear relationship, directly ratio calculates rotation speed of fan and exports to frequency conversion fan, i.e. rotation speed of fan=K* air output setting value.
3) take water valve equipment, to regulate time constant C2 be the cycle, and the wind pushing temperature setting value of take is carried out closed-loop control as target to air-conditioning unit water valve and tried to achieve water valve aperture.
Constant C 1 cycle time in said method step was determined according to the indoor temperature hysteresis time, generally got 10 ~ 30 minutes, and cycle time, constant C 2 considered acquisition according to water valve execution speed, coil pipe thermal inertia etc., generally about 30 seconds.The reasoning and calculation concrete grammar of wind pushing temperature setting value, air output setting value and water valve aperture can adopt conventional PID to control, and also can adopt other control methods such as fuzzy control.Blower fan frequency and air quantity Relation Parameters K obtain according to Fan Equipment characteristic.
The present invention, owing to having adopted said method, is divided into two loops by control, and one is required to determine wind pushing temperature setting value and then controlled water valve aperture by indoor humidity, and another is according to indoor temperature Location of requirement air output setting value and then controls air-supply rotating speed.Thereby realized the separately independent control of the humiture of indoor demand, two control loops are controlled by tandem, have coordinated the coupling of equipment and control time constant of object, make to control more reliable and more stable.Meanwhile, introduced middle parameter air output and wind pushing temperature, solved the problem that return air temperature transformation period constant can not mate with the time constant of equipment adjusting, made to control stable difficult concussion, blower fan frequency obtains stable regulation, effectively reduces fan energy consumption.Wind pushing temperature is controlled stable, and comfortableness improves, and frequently concussion of water valve action, effectively extension device service life.The stable control of air-conditioning unit also can affect the efficiency of chilled water distributing system, can improve the fractional energy savings of whole air-conditioning system.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Accompanying drawing explanation
Fig. 1 take time constant C1 to set value the method flow diagram of simultaneously controlling rotation speed of fan as cycle reasoning and calculation wind pushing temperature setting value and air output in the present invention;
Fig. 2 be take the method flow diagram of time constant C2 as periodic Control water valve aperture in the present invention.
The specific embodiment
A kind of preferred implementation method of the present invention is as follows, and reasoning and calculation method wherein be take PID control as example, but is not limited to this:
1) referring to Fig. 1, the room temperature transformation period constant C 1 of take is the cycle, the indoor actual humiture parameter of circle collection and indoor temperature and humidity setting value, and according to comparative result, required wind pushing temperature and air-supply value under the current demand of reasoning and calculation; Wherein, wind pushing temperature setting value=Kp1* humidity deviation+Ki1* humidity deviation, air output setting value=Kp2* temperature deviation+Ki2* temperature deviation.
2) in the hope of air output setting value utilize the linear relationship of general air output and blower fan frequency, calculate rotation speed of fan output control to frequency conversion fan.Rotation speed of fan=K* air output setting value.
3) referring to Fig. 2, it is the cycle that the water valve equipment of take regulates time constant C2, by wind pushing temperature setting value, air-conditioning unit water valve is carried out to closed-loop control and tries to achieve water valve aperture, water valve aperture=Kp* wind pushing temperature deviation+Ki* wind pushing temperature deviation.
Claims (1)
1. an energy-saving control method for air-conditioning unit, its method step is:
1) take room temperature transformation period constant C 1 is the cycle, circle collection indoor temperature and humidity parameter also with indoor temperature and humidity setting value relatively, and according to comparative result, by wind pushing temperature setting value required under the current demand of humidity difference reasoning and calculation; By the current required air output setting value of temperature gap reasoning and calculation;
2) in the hope of air output setting value be target, control rotation speed of fan, utilize the linear relationship of general air output and blower fan frequency, calculate rotation speed of fan output control frequency conversion fan;
3) take water valve equipment, to regulate time constant C2 be the cycle, by wind pushing temperature and the difference reasoning and calculation air-conditioning unit water valve aperture that wind pushing temperature sets value, will calculate air-conditioning unit water valve opening value and export to air-conditioning unit water valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210248333.7A CN103574829B (en) | 2012-07-18 | 2012-07-18 | A kind of energy-saving control method of air-conditioner set |
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| CN201210248333.7A CN103574829B (en) | 2012-07-18 | 2012-07-18 | A kind of energy-saving control method of air-conditioner set |
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| CN103574829A true CN103574829A (en) | 2014-02-12 |
| CN103574829B CN103574829B (en) | 2016-04-13 |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104748326A (en) * | 2015-03-17 | 2015-07-01 | 广东申菱空调设备有限公司 | Chilled water precision air conditioner and energy-conservation control method thereof |
| CN105588208A (en) * | 2016-02-28 | 2016-05-18 | 广州市设计院 | Fan coil temperature control device based on pipe diameter matching relation between fan coil and water pipe and controlled by return air temperature and air supply volume |
| CN105605684A (en) * | 2016-02-28 | 2016-05-25 | 广州市设计院 | Fan coil temperature control device for controlling opening degree of water valve based on return air temperature and air supply amount |
| CN105783177A (en) * | 2014-12-23 | 2016-07-20 | 广东美的制冷设备有限公司 | Humidifier and humidifying amount automatic adjusting method and device thereof |
| CN106152431A (en) * | 2015-04-22 | 2016-11-23 | 四川旅游学院 | Central air-conditioning adaptive PID Control |
| CN106403143A (en) * | 2015-07-31 | 2017-02-15 | 青岛海尔空调电子有限公司 | Temperature and humidity independent treatment air conditioner system and control method thereof |
| CN106839288A (en) * | 2017-01-13 | 2017-06-13 | 赵建杰 | A kind of control method of computer floor air-conditioning system |
| CN107178883A (en) * | 2017-07-27 | 2017-09-19 | 青岛海信日立空调***有限公司 | A kind of method, device and air-conditioning for calculating indoor apparatus of air conditioner leaving air temp |
| CN108019880A (en) * | 2017-10-20 | 2018-05-11 | 广西苏中达科智能工程有限公司 | Fresh air quantity control method and system |
| CN109489209A (en) * | 2018-10-11 | 2019-03-19 | 珠海格力电器股份有限公司 | Unit allocation method and apparatus |
| CN109612051A (en) * | 2018-12-05 | 2019-04-12 | 新奥数能科技有限公司 | A kind of method and apparatus that air-conditioning system maintains leaving air temp to adjust air quantity |
| CN110397981A (en) * | 2018-04-25 | 2019-11-01 | 金宝通有限公司 | It is controlled for liquid circulation heating/refrigerating system temperature variation |
| CN110469925A (en) * | 2018-05-10 | 2019-11-19 | 开利公司 | HVAC system and its control method |
| CN111486119A (en) * | 2019-01-25 | 2020-08-04 | 郑州宇通客车股份有限公司 | Method and device for calculating rotating speed of evaporation fan of automobile air conditioning system |
| CN111750507A (en) * | 2019-03-27 | 2020-10-09 | 南京南瑞继保电气有限公司 | Air conditioner tail end wind and water linkage adjusting system and adjusting method |
| CN112484254A (en) * | 2020-11-24 | 2021-03-12 | 珠海格力电器股份有限公司 | Control method, device, controller and system of combined air conditioning unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105783177A (en) * | 2014-12-23 | 2016-07-20 | 广东美的制冷设备有限公司 | Humidifier and humidifying amount automatic adjusting method and device thereof |
| CN104748326A (en) * | 2015-03-17 | 2015-07-01 | 广东申菱空调设备有限公司 | Chilled water precision air conditioner and energy-conservation control method thereof |
| CN106152431A (en) * | 2015-04-22 | 2016-11-23 | 四川旅游学院 | Central air-conditioning adaptive PID Control |
| CN106403143A (en) * | 2015-07-31 | 2017-02-15 | 青岛海尔空调电子有限公司 | Temperature and humidity independent treatment air conditioner system and control method thereof |
| CN106403143B (en) * | 2015-07-31 | 2020-08-18 | 青岛海尔空调电子有限公司 | Temperature and humidity independent processing air conditioning system and control method thereof |
| CN105588208A (en) * | 2016-02-28 | 2016-05-18 | 广州市设计院 | Fan coil temperature control device based on pipe diameter matching relation between fan coil and water pipe and controlled by return air temperature and air supply volume |
| CN105605684A (en) * | 2016-02-28 | 2016-05-25 | 广州市设计院 | Fan coil temperature control device for controlling opening degree of water valve based on return air temperature and air supply amount |
| CN106839288A (en) * | 2017-01-13 | 2017-06-13 | 赵建杰 | A kind of control method of computer floor air-conditioning system |
| CN107178883A (en) * | 2017-07-27 | 2017-09-19 | 青岛海信日立空调***有限公司 | A kind of method, device and air-conditioning for calculating indoor apparatus of air conditioner leaving air temp |
| CN107178883B (en) * | 2017-07-27 | 2020-03-13 | 青岛海信日立空调***有限公司 | Method and device for calculating air outlet temperature of indoor unit of air conditioner and air conditioner |
| CN108019880A (en) * | 2017-10-20 | 2018-05-11 | 广西苏中达科智能工程有限公司 | Fresh air quantity control method and system |
| CN110397981A (en) * | 2018-04-25 | 2019-11-01 | 金宝通有限公司 | It is controlled for liquid circulation heating/refrigerating system temperature variation |
| CN110469925B (en) * | 2018-05-10 | 2022-11-29 | 开利公司 | HVAC system and control method thereof |
| CN110469925A (en) * | 2018-05-10 | 2019-11-19 | 开利公司 | HVAC system and its control method |
| CN109489209A (en) * | 2018-10-11 | 2019-03-19 | 珠海格力电器股份有限公司 | Unit allocation method and apparatus |
| CN109612051A (en) * | 2018-12-05 | 2019-04-12 | 新奥数能科技有限公司 | A kind of method and apparatus that air-conditioning system maintains leaving air temp to adjust air quantity |
| CN111486119A (en) * | 2019-01-25 | 2020-08-04 | 郑州宇通客车股份有限公司 | Method and device for calculating rotating speed of evaporation fan of automobile air conditioning system |
| CN111750507A (en) * | 2019-03-27 | 2020-10-09 | 南京南瑞继保电气有限公司 | Air conditioner tail end wind and water linkage adjusting system and adjusting method |
| CN112484254A (en) * | 2020-11-24 | 2021-03-12 | 珠海格力电器股份有限公司 | Control method, device, controller and system of combined air conditioning unit |
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| CN103574829B (en) | 2016-04-13 |
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