CN103047737A - Air supply temperature control method of variable air quantity air conditioning system - Google Patents
Air supply temperature control method of variable air quantity air conditioning system Download PDFInfo
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- CN103047737A CN103047737A CN201310015384XA CN201310015384A CN103047737A CN 103047737 A CN103047737 A CN 103047737A CN 201310015384X A CN201310015384X A CN 201310015384XA CN 201310015384 A CN201310015384 A CN 201310015384A CN 103047737 A CN103047737 A CN 103047737A
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- wind pushing
- pushing temperature
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- static pressure
- supply temperature
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Abstract
The invention discloses an air supply temperature control method of a variable air quantity air conditioning system. The method includes adjusting a motor-driven water valve of an air conditioning unit by comparison of actual measured air supply temperature and set air supply temperature to ensure that the air supply temperature is stabilized at the set value, setting the air supply temperature and conducting automatic resetting combined with air pipe static pressure and tail end valve position. When the air pipe static pressure reaches the lowest value under work conditions in summer, the tail end largest valve position number is larger than the set value and openness of the motor-driven valve is smaller than 100%, the set air supply temperature is reduced. Current set air supply temperature is maintained under other work conditions. The air supply temperature resetting model is opposite under work conditions in winter. The air supply temperature control method is clear in target and stable in control, is combined with the air pipe static pressure and the tail end valve position condition and achieves the aims of saving energy and running comfortably by resetting the set air supply temperature after the air pipe static pressure reaches the extreme value.
Description
Technical field
The present invention relates to the wind pushing temperature control method, particularly relate to a kind of wind pushing temperature control method of air conditioning system with variable.
Background technology
Air conditioning system with variable is a kind ofly to decide wind pushing temperature, become air output and satisfy the all-air conditioning system that indoor load changes.This system has good energy saving and comfortableness, satisfies the user to the good requirement of indoor air quality, is widely used in all kinds of buildings such as office building, hospital, library and gymnasium.
Generally speaking, when air conditioning system with variable changed at air conditioner load, the wind pushing temperature of air-conditioning unit immobilized, and satisfied the load variations demand and realized energy-saving run by fan frequency conversion but change air output.But adopt fixing wind pushing temperature in one day, load less period or at the less transition season of loading, the room temperature still continues on the low side in summer under the minimum air quantity even the part room is in, comfort of air conditioner descends, if adopt end again heat then cause cold-hot counteraction and cause energy dissipation; Adopt to become the wind pushing temperature control strategy, then according to running situation, automatically improve or reduce the wind pushing temperature setting value, thereby prevent the Summer Indoor temperature from crossing low and affect comfort level, also avoid the energy dissipation that causes because of cold-hot counteraction.Therefore, resetting of wind pushing temperature is one of important means that improves air conditioning system with variable energy saving and indoor comfort degree, also is the core technology of wind pushing temperature control.
Resetting of wind pushing temperature commonly used mainly contains several different methods at present: such as manual setting, set manually according to factors such as weather, but this way has larger randomness, and too relies on operating personnel's experience and technical ability, can not satisfy the requirement of system intelligence operation; As according to outdoor parameter automatic setting, robot control system(RCS) is as carrying out raising or the reduction of design temperature according to out door climatic parameter etc., but this way has larger limitation, can not satisfy the high-precision requirement of system intelligence operation; As carrying out the adjustment of wind pushing temperature according to the ballot method, have preferably science, but system's control target is indefinite, be unfavorable for automatic control programming and enforcement.
Summary of the invention
In order to overcome the deficiency of background technology, the object of the present invention is to provide a kind of wind pushing temperature control method of air conditioning system with variable, both energy-conservation, improve the comfort of air conditioner under the little loading condiction, the wind pushing temperature control method of air conditioning system with variable that again can reliable and stable operation.
The technical solution used in the present invention is:
Its control method is: a kind of wind pushing temperature control method of air conditioning system with variable, and its control method is: after air conditioning system with variable starts, the terminal normal operation of controller Real-time Collection quantity N
0, terminal maximal valve bit quantity N
H, terminal minimum valve bit quantity N
L, wind pushing temperature T, airduct static pressure P, dynamoelectric water valve aperture V; And set following parameter: set wind pushing temperature T-
B, set terminal maximal valve bit quantity N
HB, set terminal minimum valve bit quantity N
LB, the high value of airduct static pressure P
MaxWith airduct static pressure low value P
Min, N wherein
HB＜N
0, N
LB＜N
0Control system is according to wind pushing temperature T and setting wind pushing temperature T-
BComparison, regulating electric water valve aperture V guarantees that wind pushing temperature T reaches and sets wind pushing temperature T-
BSet simultaneously wind pushing temperature T-
BAutomatically reset according to running situation, under summer condition, work as P=P
Min, and N
L〉=N
LB, N
H=0, then improve and set wind pushing temperature T-
BWork as P=P
Max, and N
H〉=N
HB, V＜100% then reduces and sets wind pushing temperature T-
BAll the other situations keep current setting wind pushing temperature T-
BConstant; For guaranteeing system run all right, set wind pushing temperature T-
BNeed continuous service just automatically to set again in 5～10 minutes; Under the winter condition, wind pushing temperature again set model is then opposite.
For the system that does not have airduct static pressure P, replace airduct static pressure P with blower fan frequency M, i.e. the high value of controller Real-time Collection blower fan frequency M, and setting blower fan frequency M
MaxWith blower fan frequency low value M
Min, all replace airduct static pressure P with blower fan frequency M in the control procedure.
The beneficial effect that the present invention has is:
System of the present invention control is with clearly defined objective, namely according to wind pushing temperature and the comparison of setting wind pushing temperature, and regulating electric water valve aperture, therefore control is reliable and stable; In conjunction with the control of airduct static pressure and terminal valve position situation, preferentially carry out the airduct static pressure and regulate simultaneously, after the airduct static pressure reaches peak and minimum, by setting the again setting of wind pushing temperature, reach the purpose of energy-conservation and comfortable operation again.
Description of drawings
Fig. 1 is system architecture diagram of the present invention.
Fig. 2 is the control flow chart of system of the present invention.
Among Fig. 1: 1. air quantity variable end device (being called for short VAV in the literary composition), 2. air quantity variable end device (VAV) controller, 3. wind pushing temperature sensor and air-supply static pressure transducer, 4. with the air-conditioning unit of fan frequency converter and motorized adjustment water valve, 5. system controller.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing and implementation method.
As shown in Figure 1, the present invention is comprised of an air-conditioning unit 4 with fan frequency converter and dynamoelectric water valve, a plurality of air quantity variable end device (VAV) 1, wind pushing temperature sensor and air-supply static pressure transducer 3, system controller 5, and each air quantity variable end device (VAV) 1 is equipped with air quantity variable end device (VAV) controller 2 separately.
Control method of the present invention is:
As shown in Figure 2, after the air quantity changeable air conditioner system air blast temperature control program starts, the terminal normal operation of controller Real-time Collection quantity N
0, terminal maximal valve bit quantity N
H, terminal minimum valve bit quantity N
L, wind pushing temperature T, airduct static pressure P, dynamoelectric water valve aperture V; And set following parameter: set wind pushing temperature T-
B, set terminal maximal valve bit quantity N
HB, set terminal minimum valve bit quantity N
LB, the high value of airduct static pressure P
MaxWith airduct static pressure low value P
MinWherein set wind pushing temperature T-
BSet according to designing requirement, such as 15 ℃; N
HBGenerally account for the fraction of system according to air-conditioning least favorable demand principle, as account for terminal normal operation quantity N
05 ~ 20%; N
LBGenerally select according to the difference of project, as account for terminal normal operation quantity N
060 ~ 80%; The high value of airduct static pressure P
MaxWith airduct static pressure low value P
MinDifference according to project is set, such as 300Pa and 80Pa.
Under the summer condition, control system is according to T and T-
BComparison, as T 〉=T-
BThe time, dynamoelectric water valve V opens greatly; As T＜T-
BThe time, dynamoelectric water valve V turns down, and makes T reach T-
BWhile T-
BAutomatically reset within the specific limits according to running situation: P reaches minimum when the airduct static pressure, i.e. P=Pmin, and N
L〉=N
LB, N
HIt is minimum that=0, P=Pmin represents that the air quantity of air-conditioning system is adjusted to, N
L〉=N
LBRepresent in this system that most of end is in minimum air quantity and may appears at that temperature still continues trend on the low side, N under the minimum air quantity
HWithout the room of maximum quantity of wind demand, then the system air quantity and the most of room that have satisfied the least favorable room is in minimum air quantity in=0 this system of expression, and this moment, system improved the air output that the wind pushing temperature setting value is conducive to improve air-conditioning system, improved comfort level, and T
BCan not be higher than setting, generally not be higher than 20 ℃.P reaches peak when the airduct static pressure, i.e. P=Pmax, and N
H〉=N
HB, V＜100%, P=Pmax represent that the air quantity of air-conditioning system is adjusted to maximum, N
H〉=N
HBRepresent to have occurred in this system a small amount of being in the maximum quantity of wind end equipment and the trend that system air conditioner can not satisfy the least favorable room may occur, V＜100% expression dynamoelectric water valve also has cooling ability, and system reduced cooling ability that the wind pushing temperature setting value is conducive to improve air-conditioning system, satisfied workload demand this moment; And T
BCan not be lower than setting, general conventional supply air system is not less than 13 ℃, and the cold air distribution system decides on design conditions.
Under the winter condition, control system is according to T and T-
BComparison, as T 〉=T-
BThe time, dynamoelectric water valve V turns down; As T＜T-
BThe time, dynamoelectric water valve V opens greatly, makes T reach T-
BWhile T-
BAutomatically reset within the specific limits according to running situation: P reaches minimum when the airduct static pressure, i.e. P=Pmin, and N
L〉=N
LB, N
HIt is minimum that=0, P=Pmin represents that the air quantity of air-conditioning system is adjusted to, N
L〉=N
LBRepresent in this system that most of end is in minimum air quantity and may appears at that temperature still continues higher trend, N under the minimum air quantity
HWithout the room of maximum quantity of wind demand, then the system air quantity and the most of room that have satisfied the least favorable room is in minimum air quantity in=0 this system of expression, and this moment, system reduced the air output that the wind pushing temperature setting value is conducive to improve air-conditioning system, improved comfort level, and T
BCan not be lower than setting, generally be not less than 25 ℃.P reaches peak when the airduct static pressure, i.e. P=Pmax, and N
H〉=N
HB, V＜100%, P=Pmax represent that the air quantity of air-conditioning system is adjusted to maximum, N
H〉=N
HBRepresent to have occurred in this system a small amount of being in the maximum quantity of wind end equipment and the trend that system air conditioner can not satisfy the least favorable room may occur, V＜100% expression dynamoelectric water valve also has heat capacity, and system improved the heat capacity that the wind pushing temperature setting value is conducive to improve air-conditioning system and satisfied workload demand this moment; And T
BCan not be higher than setting, generally not be higher than 32 ℃.
For guaranteeing system run all right, each wind pushing temperature is all kept the operation regular hour, and this time can be set according to the project situation, such as 5 ~ 10 minutes; The change step-length of each wind pushing temperature can be decided according to the project situation, such as 0.5 ℃.
For adopting the part air conditioning system with variable that becomes static pressure or total blast volume control, do not establish the airduct static pressure transducer in the control system, available blower fan frequency M replaces airduct static pressure P, i.e. the high value of controller Real-time Collection blower fan frequency M, and setting blower fan frequency M
MaxWith blower fan frequency low value M
Min, all replace airduct static pressure P with blower fan frequency M in the control procedure.
Exemplifying embodiment:
Air conditioning system with variable starts, wind pushing temperature T
B15 ℃ of initial set value.
Operating mode 1:
Summer condition gathers: T=15 ℃, and P=80Pa, V=60%, N
0=10, N
H=0, N
L=8; Set: Pmin=80Pa, T
B=15 ℃, N
LB=7, N
HB=2.P=Pmin, N
L〉=N
LB, N
H=0, then improve wind pushing temperature T
B'=15.5 ℃, dynamoelectric water valve V turns down such as 50%, makes T reach T
B'.
Set the operation certain hour by this wind pushing temperature, such as 5 minutes, enter next circulation.
Operating mode 2:
Summer condition gathers: T=15 ℃, and P=80Pa, V=60%, N
0=10, N
H=1, N
L=7; Set: Pmin=80Pa, T
B=15 ℃, N
LB=7, N
HB=2.P=Pmin, N
L〉=N
LB, N
H≠ 0, then keep current wind pushing temperature setting value, T
B'=15 ℃.
Operating mode 3:
Summer condition gathers: T=15 ℃, and P=300Pa, V=80%, N
0=10, N
H=5, N
L=1; Set: Pmax=300Pa, T
B=15 ℃, N
LB=7, N
HB=2.P=Pmax, N
H〉=N
HB, V＜100% then reduces wind pushing temperature T
BLarge as 90% are opened in '=14.5 ℃, dynamoelectric water valve, make T reach T
B'.
Operating mode 4:
Winter condition gathers: T=29 ℃, and P=300Pa, V=80%, N
0=10, N
H=5, N
L=1; Set: Pmax=300Pa, T
B=29 ℃, N
LB=7, N
HB=2.P=Pmax, N
H〉=N
HB, V＜100% then improves wind pushing temperature T
BLarge as 90% are opened in '=29.5 ℃, dynamoelectric water valve, make T reach T
B'.
Claims (2)
1. the wind pushing temperature control method of an air conditioning system with variable is characterized in that, its control method is: after air conditioning system with variable starts, and the terminal normal operation of controller Real-time Collection quantity N
0, terminal maximal valve bit quantity N
H, terminal minimum valve bit quantity N
L, wind pushing temperature T, airduct static pressure P, dynamoelectric water valve aperture V; And set following parameter: set wind pushing temperature T-
B, set terminal maximal valve bit quantity N
HB, set terminal minimum valve bit quantity N
LB, the high value of airduct static pressure P
MaxWith airduct static pressure low value P
Min, N wherein
HB＜N
0, N
LB＜N
0Control system is according to wind pushing temperature T and setting wind pushing temperature T-
BComparison, regulating electric water valve aperture V guarantees that wind pushing temperature T reaches and sets wind pushing temperature T-
BSet simultaneously wind pushing temperature T-
BAutomatically reset according to running situation, under summer condition, work as P=P
Min, and N
L〉=N
LB, N
H=0, then improve and set wind pushing temperature T-
BWork as P=P
Max, and N
H〉=N
HB, V＜100% then reduces and sets wind pushing temperature T-
BAll the other situations keep current setting wind pushing temperature T-
BConstant; For guaranteeing system run all right, set wind pushing temperature T-
BNeed continuous service just automatically to set again in 5～10 minutes; Under the winter condition, wind pushing temperature again set model is then opposite.
2. the wind pushing temperature control method of a kind of air conditioning system with variable according to claim 1, it is characterized in that: for the system that does not have airduct static pressure P, replace airduct static pressure P with blower fan frequency M, namely set the high value Mmax of blower fan frequency and blower fan frequency low value Mmin, all replace airduct static pressure P with blower fan frequency M in the control procedure.
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| CN201310015384XA CN103047737A (en) | 2013-01-16 | 2013-01-16 | Air supply temperature control method of variable air quantity air conditioning system |
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|---|---|---|---|
| CN201310015384XA CN103047737A (en) | 2013-01-16 | 2013-01-16 | Air supply temperature control method of variable air quantity air conditioning system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103353161A (en) * | 2013-07-19 | 2013-10-16 | 广东宏景科技有限公司 | System and method for controlling variable air volume air conditioner pressure independent type terminal device |
| CN103423837A (en) * | 2013-07-25 | 2013-12-04 | 青岛海信日立空调系统有限公司 | Free static pressure air pipe type air conditioner |
| 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 |
| CN105135567A (en) * | 2015-09-09 | 2015-12-09 | 徐州斯尔克纤维科技股份有限公司 | Inlet air circulating cooling system for air conditioner |
| CN105674512A (en) * | 2016-03-31 | 2016-06-15 | 深圳市新环能科技有限公司 | Energy-saving control method and system for constant-temperature constant-humidity air conditioning unit based on variable parameter adjustment |
| CN107940639A (en) * | 2017-11-09 | 2018-04-20 | 珠海格力电器股份有限公司 | The control method and device of handpiece Water Chilling Units |
| CN108317685A (en) * | 2018-01-31 | 2018-07-24 | 深圳市奥宇节能技术股份有限公司 | A kind of air conditioning control method and air-conditioning equipment terminal |
| CN109612047A (en) * | 2018-11-30 | 2019-04-12 | 北京建筑大学 | The supply air temperature control method of air conditioning system with variable |
| 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 |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103353161A (en) * | 2013-07-19 | 2013-10-16 | 广东宏景科技有限公司 | System and method for controlling variable air volume air conditioner pressure independent type terminal device |
| CN103353161B (en) * | 2013-07-19 | 2015-07-15 | 广东宏景科技有限公司 | System and method for controlling variable air volume air conditioner pressure independent type terminal device |
| CN103423837B (en) * | 2013-07-25 | 2015-09-30 | 青岛海信日立空调系统有限公司 | Free static pressure air-cooled ducted air conditioner |
| CN103423837A (en) * | 2013-07-25 | 2013-12-04 | 青岛海信日立空调系统有限公司 | Free static pressure air pipe type air conditioner |
| 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 |
| 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 |
| CN105135567A (en) * | 2015-09-09 | 2015-12-09 | 徐州斯尔克纤维科技股份有限公司 | Inlet air circulating cooling system for air conditioner |
| CN105674512A (en) * | 2016-03-31 | 2016-06-15 | 深圳市新环能科技有限公司 | Energy-saving control method and system for constant-temperature constant-humidity air conditioning unit based on variable parameter adjustment |
| CN107940639A (en) * | 2017-11-09 | 2018-04-20 | 珠海格力电器股份有限公司 | The control method and device of handpiece Water Chilling Units |
| CN107940639B (en) * | 2017-11-09 | 2019-03-19 | 珠海格力电器股份有限公司 | The control method and device of water cooler |
| CN108317685A (en) * | 2018-01-31 | 2018-07-24 | 深圳市奥宇节能技术股份有限公司 | A kind of air conditioning control method and air-conditioning equipment terminal |
| CN108317685B (en) * | 2018-01-31 | 2021-02-05 | 深圳市奥宇节能技术股份有限公司 | Air conditioner control method and air conditioner terminal |
| CN109612047A (en) * | 2018-11-30 | 2019-04-12 | 北京建筑大学 | The supply air temperature control method of air conditioning system with variable |
| 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 |
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Application publication date: 20130417 |