CN1854627A - Pressure-variable and total-blast duplex controlling method for blast-variable air-conditioner system - Google Patents
Pressure-variable and total-blast duplex controlling method for blast-variable air-conditioner system Download PDFInfo
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- CN1854627A CN1854627A CN 200510025154 CN200510025154A CN1854627A CN 1854627 A CN1854627 A CN 1854627A CN 200510025154 CN200510025154 CN 200510025154 CN 200510025154 A CN200510025154 A CN 200510025154A CN 1854627 A CN1854627 A CN 1854627A
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Abstract
The invention adopts a variable static pressure and total blast volume dual control method, in which, first, the speed f1 calculated by the total blast volume method is set the initial speed, so the first control has finished; second, using the VAV-BOX valve position feedback value of the system corrects the initial speed, so the second control has finished.
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 becomes 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 and become static pressure and total blast volume duplex controlling method, described this air conditioning system with variable becomes that static pressure and total blast volume duplex controlling method will solve in the prior art constant static-pressure control method or change static pressure control method is not suitable for the technical problem that air quantity is controlled in the air conditioning system with variable.
This air conditioning system with variable of the present invention becomes static pressure and the total blast volume duplex controlling method comprises a process of regulating rotation speed of fan in the air conditioning system with variable by frequency converter, wherein, comprise the step of a definite blower fan initial speed and the step that definite blower fan is finally revised rotating speed in the process of described adjusting rotation speed of fan, the step that comprises a definite blower fan prediction rotating speed and definite blower fan first correction rotating speed in the step of described definite blower fan initial speed again, the step that described definite blower fan prediction rotating speed and definite blower fan first are revised rotating speed realizes by total blast volume control method, finally revise in the step of rotating speed at described definite blower fan, valve seat opening value of feedback according to all terminal wind pushing box in the air conditioning system with variable, calculate final correction rotating speed by direct digital controller, after definite blower fan initial speed and blower fan are finally revised rotating speed, utilize digitial controller to regulate the rotating speed of blower fan by frequency converter.
Further, the step of described definite blower fan prediction rotating speed is realized by the frequency division method, described frequency division method is that the effective frequency range with described frequency converter is divided into a plurality of frequency divisions interval, endways under the state of wind pushing box air-valve standard-sized sheet, on each Frequency point, calculate an airflow value by direct digital controller, the all corresponding frequency separation of any one airflow value, the value of prediction rotating speed is selected a frequency in the described frequency separation for use.
Further, described first revises rotating speed adopts the step-length method to determine, described step-length method is the difference according to system's real time execution total blast volume and real-time best demand total blast volume two values, select for use corresponding step value to change first and revise rotating speed, described first revise 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 that first revises rotating speed.
Perhaps, described first revises definite employing interpolation method of rotating speed, promptly meets 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 that first revises 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, described first revises definite employing fuzzy self-adjusting control of rotating speed, by the size of fuzzy Control output quantity.
Concrete, the value of described prediction rotating speed is selected a lower frequency limit in the corresponding frequency separation for use.
Further, the valve seat opening value of feedback of the terminal wind pushing box of described air conditioning system with variable is set at 1,0 and-1 respectively.
The present invention and prior art contrast, and its effect is actively with tangible.The present invention adopts and becomes static pressure and total blast volume method control strategy, avoided to cause the unsettled constant static-pressure controlling unit of system, adopt the available strategy of FEEDFORWARD CONTROL, can guarantee within cycle equipment life effective range (being standard generally) stable and reliable operation and have comfortable characteristics such as energy-conservation with 15 years.
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 that a kind of air conditioning system with variable of the present invention becomes a preferred embodiment of static pressure and total blast volume duplex controlling method.
The specific embodiment
As shown in Figure 1, a kind of air conditioning system with variable of the present invention becomes static pressure and total blast volume duplex controlling method, in (promptly under the constant prerequisite of airduct characteristic curve) under the prerequisite of room terminal VAV air-valve 1 standard-sized sheet, calculate air quantity of each interval point by DDC controller 2.Airflow value of each interval point can directly be calculated by DDC controller 2, and in fact this be exactly that air-conditioning box is endways during air-valve 1 standard-sized sheet, in the ∑ Gi_run of a certain Frequency point value.Extrapolate f according to the demand total blast volume ∑ Gi_demand at scene and the difference of ∑ Gi_demand and ∑ Gi_run then
1, realize the first heavily control.Further, calculate final correction rotating speed Δ f by DDC according to the valve position feedback value φ of all end equipments in the system
2, finish the second heavily control, and then change the rotating speed of blower fan 3, realize variable air rate control.
The present invention adopts and becomes static pressure and total blast volume method control strategy, has avoided causing the unsettled constant static-pressure controlling unit of system, adopts the available strategy of FEEDFORWARD CONTROL, can guarantee stable and reliable operation within cycle equipment life effective range.Noise of the present invention is low, and the noise in constant static-pressure when operation is bigger; And can avoid the systematic air flow imbalance and avoid system temperature imbalance, good energy-conserving effect.
Claims (7)
1, a kind of air conditioning system with variable becomes 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: comprise the step of a definite blower fan initial speed and the step that definite blower fan is finally revised rotating speed in the process of described adjusting rotation speed of fan, the step that comprises a definite blower fan prediction rotating speed and definite blower fan first correction rotating speed in the step of described definite blower fan initial speed again, the step that described definite blower fan prediction rotating speed and definite blower fan first are revised rotating speed realizes by total blast volume control method, finally revise in the step of rotating speed at described definite blower fan, valve seat opening value of feedback according to all terminal wind pushing box in the air conditioning system with variable, calculate final correction rotating speed by direct digital controller, after definite blower fan initial speed and blower fan are finally revised rotating speed, utilize digitial controller to regulate the rotating speed of blower fan by frequency converter.
2, air conditioning system with variable as claimed in claim 1 becomes static pressure and total blast volume duplex controlling method, it is characterized in that: the step of described definite blower fan prediction rotating speed is realized by the frequency division method, described frequency division method is that the effective frequency range with described frequency converter is divided into a plurality of frequency divisions interval, endways under the state of wind pushing box air-valve standard-sized sheet, on each Frequency point, calculate an airflow value by direct digital controller, the all corresponding frequency separation of any one airflow value, the value of prediction rotating speed is selected a frequency in the described frequency separation for use.
3, air conditioning system with variable as claimed in claim 2 becomes static pressure and total blast volume duplex controlling method, it is characterized in that: described first revises rotating speed adopts the step-length method to determine, described step-length method is the difference according to system's real time execution total blast volume and real-time best demand total blast volume two values, select for use corresponding step value to change first and revise rotating speed, described first revise 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 that first revises rotating speed.
4, air conditioning system with variable as claimed in claim 2 becomes static pressure and total blast volume duplex controlling method, it is characterized in that: described first revises definite employing interpolation method of rotating speed, promptly meets 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 that first revises 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.
5, air conditioning system with variable as claimed in claim 2 becomes static pressure and total blast volume duplex controlling method, it is characterized in that: described first revises definite employing fuzzy self-adjusting control of rotating speed, by the size of fuzzy Control output quantity.
6, air conditioning system with variable as claimed in claim 2 becomes static pressure and total blast volume duplex controlling method, it is characterized in that: the value of described prediction rotating speed is selected a lower frequency limit in the corresponding frequency separation for use.
7, air conditioning system with variable as claimed in claim 1 becomes static pressure and total blast volume duplex controlling method, it is characterized in that: the valve seat opening value of feedback of the terminal wind pushing box of described air conditioning system with variable is set at 1,0 and-1 respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510025154 CN1854627A (en) | 2005-04-18 | 2005-04-18 | Pressure-variable and total-blast duplex controlling method for blast-variable air-conditioner system |
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|---|---|---|---|
| CN 200510025154 CN1854627A (en) | 2005-04-18 | 2005-04-18 | Pressure-variable and total-blast duplex controlling method for blast-variable air-conditioner system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102422095A (en) * | 2009-05-13 | 2012-04-18 | 三菱电机株式会社 | Air conditioning device |
| 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 |
| CN109539359A (en) * | 2018-10-15 | 2019-03-29 | 国网辽宁省电力有限公司 | The phase transformation electric heat-storage heating system and method for divided working status PID+ adaptive feedforward compensation |
| CN110500753A (en) * | 2019-08-14 | 2019-11-26 | 海信（山东）空调有限公司 | Air-valve matching method, device and the multi-temperature zone supply air system of multi-temperature zone supply air system |
-
2005
- 2005-04-18 CN CN 200510025154 patent/CN1854627A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102422095A (en) * | 2009-05-13 | 2012-04-18 | 三菱电机株式会社 | Air conditioning device |
| CN102422095B (en) * | 2009-05-13 | 2015-04-22 | 三菱电机株式会社 | Air conditioning device |
| 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 |
| 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 |
| CN109539359A (en) * | 2018-10-15 | 2019-03-29 | 国网辽宁省电力有限公司 | The phase transformation electric heat-storage heating system and method for divided working status PID+ adaptive feedforward compensation |
| CN110500753A (en) * | 2019-08-14 | 2019-11-26 | 海信（山东）空调有限公司 | Air-valve matching method, device and the multi-temperature zone supply air system of multi-temperature zone supply air system |
| CN110500753B (en) * | 2019-08-14 | 2021-04-30 | 海信（山东）空调有限公司 | Air valve pairing method and device of multi-temperature-zone air supply system and multi-temperature-zone air supply system |
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