CN110895014A - Control method for constant air volume of air duct machine and air conditioner - Google Patents
Control method for constant air volume of air duct machine and air conditioner Download PDFInfo
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- CN110895014A CN110895014A CN201911102497.7A CN201911102497A CN110895014A CN 110895014 A CN110895014 A CN 110895014A CN 201911102497 A CN201911102497 A CN 201911102497A CN 110895014 A CN110895014 A CN 110895014A
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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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
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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
- F24F11/88—Electrical aspects, e.g. circuits
-
- 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)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Fluid Mechanics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to a control method for constant air volume of an air duct machine and an air conditioner. The method comprises the steps of when the target constant air volume Q of the air duct machine can be obtained under a plurality of different static pressures, testing a plurality of groups of corresponding motor currents I and motor rotating speeds n in advance, and fitting to obtain a linear relation between the motor currents I and the motor rotating speeds n; when the air duct machine operates, the actual motor current I1 is adjusted, and the corresponding motor speed n1 is measured until the I1 and the n1 meet the linear relation; when the air duct machine is operated, the target motor current I corresponding to the target constant air flow Q can be obtained by taking the current I1 and the current n1 at the momentSign boardWith target motor speed nSign board. Therefore, the air quantity of the air duct machine can be dynamically adjusted through the change of the current and the rotating speed of the motor, so that the air duct machine canThe air yield can be always kept constant.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method for constant air volume of an air duct machine and an air conditioner.
Background
The use of air conditioners has become more widespread. One of the important functions of the air conditioner is to change the air volume by adjusting the mode so as to adapt to different environments and meet different requirements.
At present, in the actual operation process of an air conditioner, the high, middle and low three-gear rotating speed of an internal motor is fixed, but the static pressure of the environment used by each user is different, and after the air conditioner operates for a long time, the filter screen is dirty and blocked, so that the air volume of the air conditioner is different at the same rotating speed, the air outlet is uneven, and the comfort of the user in using the air conditioner can be directly influenced.
Disclosure of Invention
In order to solve the above problem, according to a first aspect of the present invention, there is provided a method for controlling a constant air volume of a ducted air conditioner, the ducted air conditioner being capable of providing at least one constant air volume, the method including:
(1) when the target constant air quantity Q of the air duct machine can be obtained under a plurality of different static pressures through pre-measurement, corresponding multiple groups of motor currents I and motor rotating speeds n are fitted to obtain a linear relation between the motor currents I and the motor rotating speeds n: i ═ kn + b, where k, b are constants.
(2) When the air duct machine runs, the actual motor current I1 is adjusted, and the corresponding motor speed n1 is measured until the I1 and the n1 meet the linear relation.
(3) When the air duct machine is operated, the target motor current I corresponding to the target constant air flow Q can be obtained by taking the current I1 and the current n1 at the momentSign boardWith target motor speed nSign board。
Further, the air pipe machine has a constant air volume mode, and has a plurality of air gears in the constant air volume mode, and the plurality of air gears respectively correspond to the at least one constant air volume; the method also has the step of setting a windshield, including:
a) the method comprises the following steps And (3) setting a target constant air quantity Q1 corresponding to the windshield F1, and obtaining a linear relation L1 of the motor current and the motor rotating speed corresponding to the target constant air quantity Q1 measured in advance according to the step (1).
b) The method comprises the following steps And detecting the current actual motor current I1 and the actual motor speed n1, substituting n1 into the linear relation L1, and calculating to obtain the corresponding calculated motor current I2.
c-1): calculating the absolute value of the difference between I2 and I1| I2-I1 |:
c-2): if the absolute value of the difference I2-I1 is less than or equal to the approximate constant a, the actual motor speed n1 at the moment is taken as the target motor speed nSign boardThe actual motor current I1 at this time is used as the target motor current ISign boardAnd proceeds to step d).
c-3): if the absolute value of the difference I2-I1 is larger than a, the actual motor rotating speed n1 is changed by changing the actual motor current I1, and the rotating speed change amplitude is delta n; and substituting the changed actual motor rotating speed into the linear relation L1, and calculating to obtain the calculated motor current corresponding to the changed rotating speed.
c-4): repeating the steps c-1) and c-3) by taking the changed actual motor current as I1 in the formula | I2-I1| and the calculated motor current corresponding to the changed rotating speed as I2 in the formula | I2-I1| until the absolute value of the difference | I2-I1| is less than or equal to the approach constant a so as to enter the step c-2).
Further, step d) outputs nSign boardAnd ISign boardThe motor speed and the motor current are adopted as the windshield F1 capable of providing the target constant air volume Q1.
Further, after step d), the method further comprises:
after a short pause, the setting of another wind shield F2 is entered, and the target constant wind rate corresponding to the wind shield F2 is Q2.
And, similarly, repeating steps a) -d) to determine the motor speed and motor current for the windshield F2 capable of providing the target constant air flow Q2.
Further, the Q2 is less than the Q1.
Further, the changing the actual motor speed n1 by changing the actual motor current I1 includes:
if I2 is less than I1, the actual motor current I1 is changed in a decreasing manner.
If I2 is greater than I1, the actual motor current I1 is changed in an increasing manner.
Further, the approach constant a has a value between 0.01A and 0.03A, and Δ n is 12-18 revolutions.
Further, the approach constant a is 0.02A, and Δ n is 15 revolutions.
Further, the short pause is 1S.
Furthermore, the plurality of wind gears comprise a high wind gear, a medium wind gear and a low wind gear which respectively correspond to the high constant wind quantity, the medium constant wind quantity and the low constant wind quantity.
An air conditioner having a duct type air conditioner to which the method for controlling a constant air volume of the duct type air conditioner according to any one of claims 1 to 9 is applied.
The invention has the advantages that:
(1) according to the control method for the constant air volume of the air pipe machine, the air volume is controlled by adjusting the current and the rotating speed, so that the air volume can be kept constant all the time, and the problem of unstable air volume caused by factors such as filth blockage of a filter screen and the like of an air conditioner is solved.
(2) According to the method, the linear relation between the current and the rotating speed is obtained by measuring the current and the rotating speed of the motor under different static pressures, so that the constant air volume is kept by adjusting the current and the rotating speed, the principle is simple, the interference of other factors is avoided, and the constant air volume is easier to realize.
(3) The method of the invention does not change the structure of the air conditioner, has stable air outlet and improves the comfort of the air conditioner.
Drawings
FIG. 1 is a main control logic diagram of a method for controlling a constant air volume of a ducted air conditioner according to the present invention;
FIG. 2 is a process diagram of the rotational speed dynamic adjustment in high wind gear according to the embodiment of the present invention;
FIG. 3 is a linear relationship diagram of an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Referring to the attached fig. 1-3, the method for controlling the constant air volume of the air duct machine of the invention comprises the following steps:
(1) when the target constant air quantity Q of the air duct machine can be obtained under a plurality of different static pressures through pre-measurement, corresponding multiple groups of motor currents I and motor rotating speeds n are fitted to obtain a linear relation between the motor currents I and the motor rotating speeds n: i ═ kn + b, where k, b are constants.
(2) When the air duct machine runs, the actual motor current I1 is adjusted, and the corresponding motor speed n1 is measured until the I1 and the n1 meet the linear relation.
(3) When the air duct machine is operated, the target motor current I corresponding to the target constant air flow Q can be obtained by taking the current I1 and the current n1 at the momentSign boardWith target motor speed nSign board。
Therefore, the air volume of the air duct machine can be dynamically adjusted through the change of the current and the rotating speed of the motor, so that the air volume can be always kept constant.
The air pipe machine is provided with a constant air volume mode and a plurality of air gears under the constant air volume mode, and the air gears respectively correspond to the at least one constant air volume; the method also has the step of setting a windshield, including:
a) the method comprises the following steps And (3) setting a target constant air quantity Q1 corresponding to the windshield F1, and obtaining a linear relation L1 of the motor current and the motor rotating speed corresponding to the target constant air quantity Q1 measured in advance according to the step (1).
b) The method comprises the following steps And detecting the current actual motor current I1 and the actual motor speed n1, substituting n1 into the linear relation L1, and calculating to obtain the corresponding calculated motor current I2.
c-1): calculating the absolute value of the difference between I2 and I1| I2-I1 |:
c-2): if the absolute value of the difference I2-I1 is less than or equal to the approximate constant a, the actual motor speed n1 at the moment is taken as the target motor speed nSign boardThe actual motor current I1 at this time is used as the target motor current ISign boardAnd proceeds to step d).
c-3): if the absolute value of the difference I2-I1 is larger than a, the actual motor rotating speed n1 is changed by changing the actual motor current I1, and the rotating speed change amplitude is delta n; and substituting the changed actual motor rotating speed into the linear relation L1, and calculating to obtain the calculated motor current corresponding to the changed rotating speed.
c-4): repeating the steps c-1) and c-3) by taking the changed actual motor current as I1 in the formula | I2-I1| and the calculated motor current corresponding to the changed rotating speed as I2 in the formula | I2-I1| until the absolute value of the difference | I2-I1| is less than or equal to the approach constant a so as to enter the step c-2).
Step d) outputting nSign boardAnd ISign boardThe motor speed and the motor current are adopted as the windshield F1 capable of providing the target constant air volume Q1.
After a short pause, the setting of another wind shield F2 is entered, and the target constant wind rate corresponding to the wind shield F2 is Q2. And, similarly, repeating steps a) -d) to determine the motor speed and motor current for the windshield F2 capable of providing the target constant air flow Q2. The Q2 is less than the Q1. Preferably, the short pause is 1S.
The step c-3) of changing the actual motor speed n1 by changing the actual motor current I1 comprises the following steps:
if I2 is less than I1, the actual motor current I1 is changed in a decreasing manner; if I2 is greater than I1, the actual motor current I1 is changed in an increasing manner.
The approach constant a has a value between 0.01A and 0.03A, and the delta n is 12-18 turns.
Preferably, the approach constant a is 0.02A, and Δ n is 15 revolutions.
The wind gears comprise a high wind gear, a middle wind gear and a low wind gear, and the wind gears correspond to the high constant wind quantity, the middle constant wind quantity and the low constant wind quantity respectively.
An air conditioner having a duct type air conditioner to which the method for controlling a constant air volume of the duct type air conditioner according to any one of claims 1 to 9 is applied.
Examples
This embodiment will explain the method for controlling the constant air volume of the ducted air conditioner of the present invention.
Referring to the experimental data in Table 1 and the attached FIGS. 2-3, taking the ducted air conditioner of this company as an example, when the set air volume is the high wind level QHeight of＝1600m3And when the voltage is/h, detecting the rotating speed and the current of the motor under different static pressures. According toMeasured experimental data gave QHeight ofI is 0.00068n + 0.0216.
TABLE 1 Experimental data
According to the air quantity formula, the method for controlling the constant air quantity of the air pipe machine is adopted, and specifically, three air grades of high, medium and low are set in sequence through the air grade setting step.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A method for controlling a constant air volume of a ducted air conditioner capable of providing at least one constant air volume, the method comprising:
(1) when the target constant air quantity Q of the air duct machine can be obtained under a plurality of different static pressures through pre-measurement, corresponding multiple groups of motor currents I and motor rotating speeds n are fitted to obtain a linear relation between the motor currents I and the motor rotating speeds n: i ═ kn + b, where k, b are constants;
(2) when the air duct machine operates, the actual motor current I1 is adjusted, and the corresponding motor speed n1 is measured until the I1 and the n1 meet the linear relation;
(3) when the air duct machine is operated, the target motor current I corresponding to the target constant air flow Q can be obtained by taking the current I1 and the current n1 at the momentSign boardWith target motor speed nSign board。
2. The method for controlling the constant air volume of the air duct machine according to claim 1, characterized in that: the air pipe machine is provided with a constant air volume mode and a plurality of air gears under the constant air volume mode, and the air gears respectively correspond to the at least one constant air volume; the method also has the step of setting a windshield, including:
a) the method comprises the following steps Setting a target constant air quantity Q1 corresponding to a windshield F1, and obtaining a linear relation L1 of motor current and motor rotating speed corresponding to the target constant air quantity Q1 measured in advance according to the step (1);
b) the method comprises the following steps Detecting the current actual motor current I1 and the actual motor speed n1, substituting n1 into the linear relation L1, and calculating to obtain a corresponding calculated motor current I2;
c-1): calculating the absolute value of the difference between I2 and I1| I2-I1 |:
c-2): if the absolute value of the difference I2-I1 is less than or equal to the approximate constant a, the actual motor speed n1 at the moment is taken as the target motor speed nSign boardThe actual motor current I1 at this time is used as the target motor current ISign boardAnd proceeding to step d);
c-3): if the absolute value of the difference I2-I1 is larger than a, the actual motor rotating speed n1 is changed by changing the actual motor current I1, and the rotating speed change amplitude is delta n; substituting the changed actual motor rotating speed into the linear relation L1, and calculating to obtain a calculated motor current corresponding to the changed rotating speed;
c-4): repeating the steps c-1) and c-3) by taking the changed actual motor current as I1 in the formula | I2-I1| and the calculated motor current corresponding to the changed rotating speed as I2 in the formula | I2-I1| until the absolute value of the difference | I2-I1| is less than or equal to the approach constant a so as to enter the step c-2);
step d) outputting nSign boardAnd ISign boardThe motor speed and the motor current are adopted as the windshield F1 capable of providing the target constant air volume Q1.
3. The method for controlling the constant air volume of the duct machine according to claim 2, wherein after the step d), the method further comprises:
after the temporary pause, entering the setting of another wind shield F2, wherein the target constant air volume corresponding to the wind shield F2 is Q2;
and, similarly, repeating steps a) -d) to determine the motor speed and motor current for the windshield F2 capable of providing the target constant air flow Q2.
4. The method for controlling the constant air volume of the air duct machine according to claim 3, characterized in that: the Q2 is less than the Q1.
5. The method for controlling the constant air volume of the air duct machine according to claim 2, characterized in that: the changing the actual motor speed n1 by changing the actual motor current I1 includes:
if I2 is less than I1, the actual motor current I1 is changed in a decreasing manner;
if I2 is greater than I1, the actual motor current I1 is changed in an increasing manner.
6. The method for controlling the constant air volume of the air duct machine according to claim 2, characterized in that: the approach constant a has a value between 0.01A and 0.03A, and the delta n is 12-18 turns.
7. The method for controlling the constant air volume of the air duct machine according to claim 6, wherein the method comprises the following steps: the approach constant a is 0.02A, and Δ n is 15 revolutions.
8. The method for controlling the constant air volume of the air duct machine according to claim 3 or 4, wherein the method comprises the following steps: the brief pause is 1S.
9. The method for controlling the constant air volume of the air duct machine according to claim 2, characterized in that: the wind gears comprise a high wind gear, a middle wind gear and a low wind gear, and the wind gears correspond to the high constant wind quantity, the middle constant wind quantity and the low constant wind quantity respectively.
10. An air conditioner has a ducted air conditioner, characterized in that: the air duct machine is applied to the control method for controlling the constant air volume of the air duct machine according to any one of claims 1 to 9.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111829145A (en) * | 2020-06-09 | 2020-10-27 | 华帝股份有限公司 | Control method of kitchen air conditioner |
| CN111928414A (en) * | 2020-07-28 | 2020-11-13 | 青岛海尔空调电子有限公司 | Air conditioner indoor unit rotating speed debugging method, rotating speed control method and air conditioner indoor unit |
| CN111998413A (en) * | 2020-09-08 | 2020-11-27 | 华帝股份有限公司 | Control method for self-adaptive air volume adjustment and range hood applying control method |
| CN112611068A (en) * | 2020-12-22 | 2021-04-06 | 宁波奥克斯电气股份有限公司 | Static pressure detection method and device and air conditioner |
| CN113108443A (en) * | 2021-04-26 | 2021-07-13 | 广东积微科技有限公司 | Control method for constant air volume of air duct machine and air conditioner |
| CN113531655A (en) * | 2020-04-14 | 2021-10-22 | 青岛海信日立空调***有限公司 | Air duct machine |
| CN113834176A (en) * | 2021-08-18 | 2021-12-24 | 杭州洲钜电子科技有限公司 | Constant air volume curve calibration method, control terminal of equipment and readable storage medium |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113531655A (en) * | 2020-04-14 | 2021-10-22 | 青岛海信日立空调***有限公司 | Air duct machine |
| CN111829145A (en) * | 2020-06-09 | 2020-10-27 | 华帝股份有限公司 | Control method of kitchen air conditioner |
| CN111928414A (en) * | 2020-07-28 | 2020-11-13 | 青岛海尔空调电子有限公司 | Air conditioner indoor unit rotating speed debugging method, rotating speed control method and air conditioner indoor unit |
| CN111998413A (en) * | 2020-09-08 | 2020-11-27 | 华帝股份有限公司 | Control method for self-adaptive air volume adjustment and range hood applying control method |
| CN112611068A (en) * | 2020-12-22 | 2021-04-06 | 宁波奥克斯电气股份有限公司 | Static pressure detection method and device and air conditioner |
| CN113108443A (en) * | 2021-04-26 | 2021-07-13 | 广东积微科技有限公司 | Control method for constant air volume of air duct machine and air conditioner |
| CN113834176A (en) * | 2021-08-18 | 2021-12-24 | 杭州洲钜电子科技有限公司 | Constant air volume curve calibration method, control terminal of equipment and readable storage medium |
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Application publication date: 20200320 |
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