CN1854625A - Constant static-pressure and total-blast duplexing controlling method of blast-variable air-conditioner system - Google Patents
Constant static-pressure and total-blast duplexing controlling method of blast-variable air-conditioner system Download PDFInfo
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- CN1854625A CN1854625A CN 200510025155 CN200510025155A CN1854625A CN 1854625 A CN1854625 A CN 1854625A CN 200510025155 CN200510025155 CN 200510025155 CN 200510025155 A CN200510025155 A CN 200510025155A CN 1854625 A CN1854625 A CN 1854625A
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Abstract
The invention comprises a process of regulating the speed of the fan in the variable blast volume air-conditioning system via a frequency converter. The process includes the following steps of determining the prediction speed and the correction speed of the fan. After determining the prediction speed and the correction speed of the fan, a digital controller is used for regulating the speed of fan via the frequency converter.
Description
Technical field
The present invention relates to aeration technology, relate in particular to the control method of air-conditioning air quantity, particularly a kind of air conditioning system with variable constant static-pressure and total blast volume duplex controlling method.
Background technology
In the prior art, air quantity control is adopted the constant static-pressure control method or is become the static pressure control method in the air conditioning system with variable.The constant static-pressure control method is in the appropriate location of supply air system pipe network, for example from blower fan 2/3 place static pressure transducer is being set, and under the prerequisite that keeps this static pressure certain value, is subjected to electric frequency to change the air output of air-conditioning system by regulating blower fan.And become the static pressure control method is to be full of between 85%-100% at the valve that keeps each vav terminal, making valve standard-sized sheet and making under the prerequisite that static pressure reduces as far as possible in the airduct as far as possible, is subjected to electric frequency to change the air output of air-conditioning system by regulating blower fan.The constant static-pressure control method can not scientifically be determined static pressure point and constant static-pressure value in theory, is often replaced by return air temperature control in practice process, thereby will be eliminated.And the wind pushing temperature that becomes the generation of static pressure control method is on the low side, influences comfortable effect, and system response speed is slow, and communication speed is low.
Summary of the invention
The purpose of this invention is to provide a kind of air conditioning system with variable constant static-pressure and total blast volume duplex controlling method, described this air conditioning system with variable constant static-pressure and total blast volume duplex controlling method will solve constant static-pressure control method in the prior art or become the technical problem that the static pressure control method is not suitable for air quantity control in the air conditioning system with variable.
This air conditioning system with variable constant static-pressure of the present invention and total blast volume duplex controlling method comprise a process of regulating rotation speed of fan in the air conditioning system with variable by frequency converter, wherein, in the process of described adjusting rotation speed of fan, comprise the step of a definite blower fan prediction rotating speed and the step of a definite blower fan correction rotating speed, in the step of described definite blower fan prediction rotating speed, adopt the constant static-pressure control method to calculate blower fan prediction rotating speed, in the step of described definite blower fan correction rotating speed, obtain system's real time execution total blast volume by measurement, and described system real time execution total blast volume and real-time best demand total blast volume compared, measures of dispersion according to system's real time execution total blast volume that relatively obtains and real-time best demand total blast volume calculates blower fan correction rotating speed again, after definite blower fan prediction rotating speed and blower fan correction rotating speed, utilize digitial controller to regulate the rotating speed of blower fan by frequency converter.
Further, described employing constant static-pressure control method calculates in the process of blower fan prediction rotating speed, at first a Chosen Point is provided with static pressure transducer in the supply air system pipe network, keeping under the fixing prerequisite of this Chosen Point static pressure, according to the needs temperature in the room air output is set, the corresponding rotation speed of fan of this air output is set at described blower fan prediction rotating speed.
Further, described system real time execution total blast volume is the air quantity that directly records by Pitot tube or ultrasonic wave under the state of the terminal air-valve standard-sized sheet in room.
Further, described blower fan correction rotating speed determine to meet following rule:
(∑ Gi_demand-∑ Gi_run)/∑ Gi_run＞1% o'clock, Δ f=1;
-1%≤(∑ Gi_demand-∑ Gi_run)/∑ Gi_run≤1% o'clock, Δ f=0;
(∑ Gi_demand-∑ Gi_run)/∑ Gi_run＜-1% o'clock, Δ f=1.
Wherein, ∑ Gi_run represents the air-conditioning box airflow value of certain blower fan frequency of correspondence during the air-valve standard-sized sheet endways, and ∑ Gi_demand represents the requirements of user's total blast volume, and Δ f represents to revise rotating speed.
Perhaps, described blower fan correction rotating speed determine to meet following rule:
Δf＝(∑Gi_demand-∑Gi_run)/(∑Gi0+1_run--∑Gi0_run)*Δf0，
Wherein, described ∑ Gi0+1_run and described ∑ Gi0_run represent the interior air quantity that is moved of respective frequencies scope respectively.Δ f represents to revise rotating speed, and ∑ Gi_run represents the air-conditioning box airflow value of certain blower fan frequency of correspondence during the air-valve standard-sized sheet endways, and ∑ Gi_demand represents the requirements of user's total blast volume.
Perhaps, definite employing fuzzy self-adjusting control of described correction rotating speed is by the size of fuzzy Control output quantity.
Further, described static pressure transducer is arranged on supply air system pipeline length middle distance blower fan 2/3 place.
Concrete, described fuzzy self-adjusting control is to be theoretical foundation, a kind of numerical control system with closed-loop structure of feedback channel that adopts the Computer Control Technology formation with the knowledge representation of fuzzy set theory, fuzzy mathematics, fuzzy language type and the rule-based reasoning of fuzzy logic at present.Fuzzy control does not rely on the Mathematical Modeling of controlled device, but realizes a kind of means of automation on the basis of summing up operating experience, and it is decided the size of controlled quentity controlled variable then according to Artificial Control regular weaves control decision table by this voting.It forms core is to have intelligent fuzzy controller.
The present invention and prior art contrast, and its effect is actively with tangible.The present invention combines the constant static-pressure control method with the total blast volume control method, constantly revise blower fan correction rotating speed by the total blast volume method, thereby obtains corresponding energy-saving effect.
Purpose of the present invention, feature and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.
Description of drawings
Fig. 1 is the principle schematic of a preferred embodiment of a kind of air conditioning system with variable constant static-pressure of the present invention and total blast volume duplex controlling method.
Fig. 2 is the fuzzy self-adjusting control schematic diagram in order to definite blower fan correction rotating speed that adopts in the preferred embodiment of a kind of air conditioning system with variable constant static-pressure of the present invention and total blast volume duplex controlling method.
The specific embodiment
As shown in Figure 1, air conditioning system with variable constant static-pressure of the present invention and total blast volume duplex controlling method, comprise a process of regulating blower fan 1 rotating speed in the air conditioning system with variable by frequency converter, wherein, in the process of described adjusting rotation speed of fan, comprise the step of a definite blower fan prediction rotating speed and the step of a definite blower fan correction rotating speed, in the step of described definite blower fan prediction rotating speed, adopt the constant static-pressure control method to calculate blower fan prediction rotating speed, in the step of described definite blower fan correction rotating speed, obtain system's real time execution total blast volume by measurement, and described system real time execution total blast volume and real-time best demand total blast volume compared, measures of dispersion according to system's real time execution total blast volume that relatively obtains and real-time best demand total blast volume calculates blower fan correction rotating speed again, after definite blower fan prediction rotating speed and blower fan correction rotating speed, utilize digitial controller 3 to regulate the rotating speed of blower fan 1 by frequency converter.
Further, described employing constant static-pressure control method calculates in the process of blower fan prediction rotating speed, at first a Chosen Point is provided with static pressure transducer in the supply air system pipe network, keeping under the fixing prerequisite of this Chosen Point static pressure, according to the needs temperature in the room air output is set, the corresponding rotation speed of fan of this air output is set at described blower fan prediction rotating speed.
Further, described system real time execution total blast volume is the air quantity that directly records by Pitot tube or ultrasonic wave under the state of terminal air-valve 2 standard-sized sheets in room.
Further, described blower fan correction rotating speed determine to meet following rule:
(∑ Gi_demand-∑ Gi_run)/∑ Gi_run＞1% o'clock, Δ f=1;
-1%≤(∑ Gi_demand-∑ Gi_run)/∑ Gi_run≤1% o'clock, Δ f=0;
(∑ Gi_demand-∑ Gi_run)/∑ Gi_run＜-1% o'clock, Δ f=1.
Wherein, ∑ Gi_run represents the air-conditioning box airflow value of certain blower fan frequency of correspondence during the air-valve standard-sized sheet endways, and ∑ Gi_demand represents the requirements of user's total blast volume, and Δ f represents to revise rotating speed.
Perhaps, described blower fan correction rotating speed determine to meet following rule:
Δf＝(∑Gi_demand-∑Gi_run)/(∑Gi0+1_run--∑Gi0_run)*Δf0，
Wherein, described ∑ Gi0+1_run and described ∑ Gi0_run represent the interior air quantity that is moved of respective frequencies scope respectively.Δ f represents to revise rotating speed, and ∑ Gi_run represents the air-conditioning box airflow value of certain blower fan frequency of correspondence during the air-valve standard-sized sheet endways, and ∑ Gi_demand represents the requirements of user's total blast volume.
Perhaps, definite employing fuzzy self-adjusting control of described correction rotating speed is by the size of fuzzy Control output quantity.
Further, described static pressure transducer is arranged on 2/3rds places of supply air system pipeline length middle distance blower fan 1.
Concrete, described fuzzy self-adjusting control is to be theoretical foundation, a kind of numerical control system with closed-loop structure of feedback channel that adopts the Computer Control Technology formation with the knowledge representation of fuzzy set theory, fuzzy mathematics, fuzzy language type and the rule-based reasoning of fuzzy logic at present.Fuzzy control does not rely on the Mathematical Modeling of controlled device, but realizes a kind of means of automation on the basis of summing up operating experience, and it is decided the size of controlled quentity controlled variable then according to Artificial Control regular weaves control decision table by this voting.It forms core is to have intelligent fuzzy controller.As shown in Figure 2, R is setting value (accurately amount) e, ec is respectively systematic error and error rate (accurately amount) E, EC reflects that respectively fuzzy set (fuzzy quantity) U of the linguistic variable that error and error change is that fuzzy set (fuzzy quantity) U on the fuzzy controller output signal domain is the control action (accurately amount) of fuzzy controller output, and y is system's output (an accurately amount).
Fuzzy be also referred to as ratio-integration-differential control from Tuning PID Controller, its control performance is decided by proportionality coefficient Kp, integral coefficient K1 and differential coefficient Kd, and design and debugging person's task determines this 3 coefficients exactly.Fuzzy is exactly on the basis of pid algorithm from the PID that adjusts, by calculating current error e and error change rate ec, utilize engineering staff's technological know-how and practical operation experience suggestion knowledge base (fuzzy rule), carries out parameter adjustment by fuzzy reasoning.
Claims (7)
1, a kind of air conditioning system with variable constant static-pressure and total blast volume duplex controlling method, comprise a process of regulating rotation speed of fan in the air conditioning system with variable by frequency converter, it is characterized in that: in the process of described adjusting rotation speed of fan, comprise the step of a definite blower fan prediction rotating speed and the step of a definite blower fan correction rotating speed, in the step of described definite blower fan prediction rotating speed, adopt the constant static-pressure control method to calculate blower fan prediction rotating speed, in the step of described definite blower fan correction rotating speed, obtain system's real time execution total blast volume by measurement, and described system real time execution total blast volume and real-time best demand total blast volume compared, measures of dispersion according to system's real time execution total blast volume that relatively obtains and real-time best demand total blast volume calculates blower fan correction rotating speed again, after definite blower fan prediction rotating speed and blower fan correction rotating speed, utilize digitial controller to regulate the rotating speed of blower fan by frequency converter.
2, air conditioning system with variable constant static-pressure as claimed in claim 1 and total blast volume duplex controlling method, it is characterized in that: described employing constant static-pressure control method calculates in the process of blower fan prediction rotating speed, at first a Chosen Point is provided with static pressure transducer in the supply air system pipe network, keeping under the fixing prerequisite of this Chosen Point static pressure, according to the needs temperature in the room air output is set, the corresponding rotation speed of fan of this air output is set at described blower fan prediction rotating speed.
3, air conditioning system with variable constant static-pressure as claimed in claim 1 and total blast volume duplex controlling method is characterized in that: described system real time execution total blast volume is the air quantity that directly records by Pitot tube or ultrasonic wave under the state of the terminal air-valve standard-sized sheet in room.
4, air conditioning system with variable constant static-pressure as claimed in claim 1 and total blast volume duplex controlling method is characterized in that: described blower fan correction rotating speed determine to meet following rule:
(∑ Gi_demand-∑ Gi_run)/∑ Gi_run＞1% o'clock, Δ f=1;
-1%≤(∑ Gi_demand-∑ Gi_run)/∑ Gi_run≤1% o'clock, Δ f=0;
(∑ Gi_demand-∑ Gi_run)/∑ Gi_run＜-1% o'clock, Δ f=1.Wherein, ∑ Gi_run represents the air-conditioning box airflow value of certain blower fan frequency of correspondence during the air-valve standard-sized sheet endways, and ∑ Gi_demand represents the requirements of user's total blast volume, and Δ f represents to revise rotating speed.
5, air conditioning system with variable constant static-pressure as claimed in claim 1 and total blast volume duplex controlling method is characterized in that: described blower fan correction rotating speed determine to meet following rule:
Δf＝(∑Gi_demand-∑Gi_run)/(∑Gi0+1_run--∑Gi0_rnn)*Δf0，
Wherein, described ∑ Gi0+1_run and described ∑ Gi0_run represent the interior air quantity that is moved of respective frequencies scope respectively.Δ f represents to revise rotating speed, and ∑ Gi_run represents the air-conditioning box airflow value of certain blower fan frequency of correspondence during the air-valve standard-sized sheet endways, and ∑ Gi_demand represents the requirements of user's total blast volume.
6, air conditioning system with variable constant static-pressure as claimed in claim 1 and total blast volume duplex controlling method is characterized in that: definite employing fuzzy self-adjusting control of described correction rotating speed, and by the size of fuzzy Control output quantity.
7, air conditioning system with variable constant static-pressure as claimed in claim 2 and total blast volume duplex controlling method is characterized in that: described static pressure transducer is arranged on supply air system pipeline length middle distance blower fan 2/3 place.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538148A (en) * | 2012-03-05 | 2012-07-04 | 中兴通讯股份有限公司 | Method and system for controlling wind volume of communication room |
| CN102680031A (en) * | 2011-05-31 | 2012-09-19 | 邯郸市康创电气有限公司 | Method for measuring fan delivery by static pressure difference |
| CN103375419A (en) * | 2012-04-26 | 2013-10-30 | 中山大洋电机股份有限公司 | Constant air quantity control method for motor and air conditioner fan system |
| WO2013159458A1 (en) * | 2012-04-26 | 2013-10-31 | 中山大洋电机股份有限公司 | Motor and constant air volume control method for air-conditioning fan system |
| CN105570175A (en) * | 2016-03-07 | 2016-05-11 | 南京沃特电机有限公司 | Constant-air-volume motor drive control method for fan |
| CN107525231A (en) * | 2017-08-14 | 2017-12-29 | 苏州艾杰特环境科技有限公司 | A kind of VAV variable air volume systems become static pressure and total blast volume double control strategy |
| CN107543282A (en) * | 2017-08-14 | 2018-01-05 | 苏州艾杰特环境科技有限公司 | A kind of VAV variable air volume systems constant static-pressure and total blast volume double control strategy |
| CN107560102A (en) * | 2017-08-14 | 2018-01-09 | 苏州艾杰特环境科技有限公司 | A kind of VAV variable air volume systems total blast volume method control strategy |
| CN111277183A (en) * | 2018-11-20 | 2020-06-12 | 广东美的环境电器制造有限公司 | Motor rotating speed adjusting method, device, equipment and medium |
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2005
- 2005-04-18 CN CN 200510025155 patent/CN1854625A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102680031A (en) * | 2011-05-31 | 2012-09-19 | 邯郸市康创电气有限公司 | Method for measuring fan delivery by static pressure difference |
| CN102680031B (en) * | 2011-05-31 | 2014-05-21 | 邯郸市康创电气有限公司 | Method for measuring fan delivery by static pressure difference |
| CN102538148A (en) * | 2012-03-05 | 2012-07-04 | 中兴通讯股份有限公司 | Method and system for controlling wind volume of communication room |
| CN103375419A (en) * | 2012-04-26 | 2013-10-30 | 中山大洋电机股份有限公司 | Constant air quantity control method for motor and air conditioner fan system |
| WO2013159458A1 (en) * | 2012-04-26 | 2013-10-31 | 中山大洋电机股份有限公司 | Motor and constant air volume control method for air-conditioning fan system |
| CN103375419B (en) * | 2012-04-26 | 2015-10-28 | 中山大洋电机股份有限公司 | The constant air capacity control of a kind of motor and air conditioner draught fan system |
| CN105570175A (en) * | 2016-03-07 | 2016-05-11 | 南京沃特电机有限公司 | Constant-air-volume motor drive control method for fan |
| CN105570175B (en) * | 2016-03-07 | 2018-12-14 | 南京沃特电机有限公司 | A kind of blower permanent wind amount motor drive control method |
| CN107525231A (en) * | 2017-08-14 | 2017-12-29 | 苏州艾杰特环境科技有限公司 | A kind of VAV variable air volume systems become static pressure and total blast volume double control strategy |
| CN107543282A (en) * | 2017-08-14 | 2018-01-05 | 苏州艾杰特环境科技有限公司 | A kind of VAV variable air volume systems constant static-pressure and total blast volume double control strategy |
| CN107560102A (en) * | 2017-08-14 | 2018-01-09 | 苏州艾杰特环境科技有限公司 | A kind of VAV variable air volume systems total blast volume method control strategy |
| CN111277183A (en) * | 2018-11-20 | 2020-06-12 | 广东美的环境电器制造有限公司 | Motor rotating speed adjusting method, device, equipment and medium |
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