CN111076344A - Control method and system for automatically adjusting fan frequency reduction rate and storage medium - Google Patents
Control method and system for automatically adjusting fan frequency reduction rate and storage medium Download PDFInfo
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- CN111076344A CN111076344A CN201911253206.4A CN201911253206A CN111076344A CN 111076344 A CN111076344 A CN 111076344A CN 201911253206 A CN201911253206 A CN 201911253206A CN 111076344 A CN111076344 A CN 111076344A
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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
- F24F11/64—Electronic processing using pre-stored data
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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
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Abstract
The invention relates to a control method, a system and a storage medium for automatically adjusting the frequency reduction rate of a fan; the control method for automatically adjusting the frequency reduction rate of the fan comprises the steps of detecting and obtaining the current value of the fan after the direct current fan operates, and judging whether a fan closing signal occurs to a unit or not according to the current value of the fan; and if the unit is judged to have a fan closing signal, adjusting and reducing the current value of the fan by adopting a corresponding functional relation formula, and controlling the direct current fan to be safely stopped. According to the invention, under the condition of not increasing auxiliary components, the control logic of the shutdown of the fan is optimized, the current value of the fan is reduced by adopting a corresponding functional relation, the safe shutdown of the direct current fan is controlled, the reliability of a product is improved, the error protection caused by the shutdown of the fan is avoided, and the service life of main board components is prolonged.
Description
Technical Field
The invention relates to the technical field of direct current fans, in particular to a control method and a control system for automatically adjusting the frequency reduction rate of a fan and a storage medium.
Background
At present, a large number of direct current fans are used by air conditioner fans, when the direct current fans receive stop signals, the fans are directly shut down, when the current of the fans is too high, the fans are continuously rotated after the fans are powered off, the fans can generate current opposite to the current of the fans, electricity generated under the condition can instantly form very high voltage, and the voltage exceeds the voltage protection value of an air conditioner mainboard to cause mainboard protection, and the service life of air conditioner mainboard components is influenced by the high voltage.
This application adopts novel control logic, optimizes the fan and shuts down control, avoids shutting down because of the fan and causes air conditioner mainboard mistake protection.
Disclosure of Invention
The invention aims to overcome the problems in the prior art, provides a control method for automatically adjusting the frequency reduction rate of a fan, optimizes the control logic of the shutdown of the fan under the condition of not increasing auxiliary components, adopts a corresponding function relation type to adjust and reduce the current value of the fan, controls the safe shutdown of a direct current fan, improves the reliability of a product, avoids error protection caused by the shutdown of the fan and prolongs the service life of main board components.
In order to achieve the purpose, the invention adopts the following scheme:
the control method comprises the steps of detecting and obtaining a fan current value after a direct current fan operates, and judging whether a fan closing signal occurs to a unit according to the fan current value;
and if the unit is judged to have a fan closing signal, adjusting and reducing the current value of the fan by adopting a corresponding functional relation formula, and controlling the direct current fan to be safely stopped.
Further, if the unit is judged to have a fan closing signal, the current value of the fan is adjusted and reduced by adopting a corresponding functional relation formula, and the direct current fan is controlled to be safely stopped as follows:
s1, after receiving a fan closing signal, judging that the current value of a fan is located in a current interval;
s2, determining a current interval where the fan current value is located, and regulating and reducing the fan current value by adopting a function relation formula in the current interval;
and S3, controlling the rotating speed of the fan to be reduced, and finally, completing shutdown actions of the fan after current change is completed until the fan is started next time and operating the program again.
Further, the current interval comprises a current interval A, a current interval B and a current interval C; the current interval A is A1-A2; the current interval B is A2-B2; the current interval C is equal to or larger than B2 and equal to or smaller than C2; the A, B, C corresponds to actual fan current values in a current interval A, a current interval B and a current interval C respectively; the A1, the A2, the B2 and the C2 are preset current values.
Further, in step S2,
if the current value of the fan is determined to be in a current interval A; the current value of the fan changes according to Y ═ k × (t) + (D);
y represents a current value real-time value, k represents a current change coefficient, t represents time after the fan receives a shutdown signal, and D represents a constant which is a unit current change revision value;
if the current value of the fan is determined to be in a current interval B; the fan current value is changed by Y1 ═ k1 ═ t1+ D1;
wherein Y1 represents a current value real-time value, k1 represents a current change coefficient, t1 represents time after the fan receives a shutdown signal, and D1 represents a current change revision value with a constant as a unit;
if the current value of the fan is determined to be in a current interval C; the fan current value is changed by Y2 ═ k2 ═ t2+ D2;
wherein, Y2 represents a current value real-time value, k2 represents a current change coefficient, t2 represents time after the fan receives a shutdown signal, and D2 represents a current change revision value with a constant as a unit.
Further, in step S2, k is-2; d is 8; k1 ═ o; d1 ═ 5; k2 ═ 0.4; d2 ═ 3.5.
Further, the current preset values a1, a2, B2 and C2 are respectively 3, 5, 7 and 10; the current interval A is more than or equal to 3 and less than or equal to 5; the current interval B is more than or equal to 5 and less than or equal to 7; the current interval C is more than or equal to 7 and less than or equal to 10.
Further, the control method further comprises the step of continuing to operate the fan according to the original program if the fan closing signal is judged not to appear in the unit.
Further, the fan current value is detected by a current sensor.
And the storage medium is used for storing a program, and the control method for automatically adjusting the fan frequency reduction rate is realized when the stored program is used by the processor.
The control system for automatically adjusting the frequency reduction rate of the fan comprises a processor and a memory; the memory stores a program, and the control method for automatically adjusting the fan frequency reduction rate is realized when the stored program is used by the processor.
Compared with the prior art, the invention has the following advantages:
the control method for automatically adjusting the fan frequency reduction rate optimizes the control logic of the fan shutdown under the condition of not increasing auxiliary components, adopts the corresponding function relation to adjust and reduce the current value of the fan, controls the direct current fan to safely shut down, improves the reliability of products, avoids error protection caused by the fan shutdown, and prolongs the service life of main board components.
Drawings
The present application will be described in further detail with reference to the following drawings and detailed description.
Fig. 1 is a schematic program flow diagram of a control method for automatically adjusting the fan frequency reduction rate according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of the present invention.
Example 1:
referring to fig. 1, a control method for automatically adjusting a fan frequency reduction rate is to detect a fan current value through a current detection unit after a direct current fan operates; the current detection unit can be a current sensor, then a fan current value is obtained through a main control unit of the unit, and whether a fan closing signal occurs in the unit is judged according to the fan current value; specifically, the main control unit of the unit compares the current value of the fan with a set current interval, if the current value of the fan falls into the set current interval, a fan shutdown signal is judged to be sent, and the fan can execute shutdown operation after receiving the signal. If the unit is judged to have a fan closing signal, adopting a corresponding functional relation formula to regulate and reduce the current value of the fan and controlling the direct current fan to be safely stopped; and if the fan closing signal is judged not to appear in the unit, the fan continues to operate according to the original program.
According to the control method for automatically adjusting the frequency reduction rate of the fan, under the condition that auxiliary components are not required to be added, the control logic of the shutdown of the fan is optimized, the current value of the fan is adjusted and reduced by adopting a corresponding function relation formula, the direct current fan is controlled to be safely shut down, the reliability of a product is improved, the error protection caused by the shutdown of the fan is avoided, and the service life of main board components is prolonged.
In this embodiment, after determining that the fan shutdown signal occurs in the unit, the current value of the fan is adjusted and reduced by using the corresponding functional relation, and the direct current fan is controlled to be safely shut down, which includes the following steps:
s1, after receiving a fan closing signal, judging that the current value of the fan is located in a current interval.
The current interval comprises a current interval A, a current interval B and a current interval C; the current interval A is A1-A2; the current interval B is A2-B2; the current interval C is equal to or larger than B2 and equal to or smaller than C2; the A, B, C corresponds to actual fan current values in a current interval A, a current interval B and a current interval C respectively; the A1, the A2, the B2 and the C2 are preset current values. Preferably, the preset current values a1, a2, B2 and C2 are respectively 3, 5, 7 and 10; the current interval A is more than or equal to 3 and less than or equal to 5; the current interval B is more than or equal to 5 and less than or equal to 7; the current interval C is more than or equal to 7 and less than or equal to 10. In the current interval, the current value of the fan can be adjusted and reduced by adopting a corresponding functional relation, so that the direct current fan is controlled to be safely stopped.
S2, determining a current interval where the fan current value is located, and adjusting and reducing the fan current value by adopting a function relation formula in the current interval.
If the current value of the fan is determined to be in a current interval A; the current value of the fan changes according to Y ═ k × (t) + (D); the current value real-time value is represented by Y, the current change coefficient is represented by k, the time after the fan receives a shutdown signal is represented by t, and the current change revision value is a unit current change revision value obtained through a large number of experimental tests. Such as k-2; and D is 8, then Y is-2 t +8, where t is in seconds. After receiving a fan closing signal, the current value of the fan is in the current interval A, the current of the fan is slowly reduced by adopting the function relation of-2 t +8, the rotating speed of the fan is reduced after the current of the fan is reduced, and the fan is stopped under the safe current.
If the current value of the fan is determined to be in a current interval B; the fan current value is changed by Y1 ═ k1 ═ t1+ D1; wherein, Y1 represents a current value real-time value, k1 represents a current change coefficient, t1 represents time after the fan receives a shutdown signal, and D1 represents a constant, which is a unit current change revision value obtained through a large number of experimental tests. Such as k1 ═ -1; and D1 is 5, then Y1 is-t 1+5, wherein t1 is seconds. After a fan closing signal is received, the current value of the fan is in the current interval B, the current of the fan is slowly reduced by adopting the function relation of-t 1+5 when Y1 is equal to-t, and the rotating speed of the fan is reduced after the current of the fan is reduced, so that the fan is stopped under the safe current.
If the current value of the fan is determined to be in a current interval C; the fan current value is changed by Y2 ═ k2 ═ t2+ D2; wherein, Y2 represents a current value real-time value, k2 represents a current change coefficient, t2 represents time after the fan receives a shutdown signal, and D2 represents a constant, which is a unit current change revision value obtained through a large number of experimental tests. Such as k2 ═ -1; d2 ═ 3.5, then Y2 ═ 0.4t2+3.5, where t2 units are seconds. After a fan closing signal is received, and the current value of the fan is in the current interval C, the fan current is slowly reduced by adopting the function relation of-0.4 t2+3.5 when the Y2 is, the rotating speed of the fan is reduced after the fan current is reduced, and the fan is stopped under the safe current.
And S3, controlling the rotating speed of the fan to be reduced, and finally, completing shutdown actions of the fan after current change is completed until the fan is started next time and operating the program again.
By the control method for automatically adjusting the fan frequency reduction rate, the control logic of fan shutdown is optimized, the problem of mainboard error protection caused by fan shutdown is solved, the service life of key components of the mainboard is prolonged, the cost is not required to be increased, the reliability of products is improved, and customer complaints are avoided.
Example 2:
in this embodiment, the storage medium is used to store a program, and the stored program is used by the processor to implement the control method for automatically adjusting the fan down-conversion rate according to embodiment 1. The program may be stored in a storage medium if it is implemented in the form of a software functional unit and sold or used as a separate product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a device to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
Example 3:
in this embodiment, the control system for automatically adjusting the fan frequency reduction rate includes a processor and a memory; the memory stores a program, and the control method for automatically adjusting the fan frequency reduction rate in embodiment 1 is implemented when the stored program is used by the processor.
Example 4:
in this embodiment, an air conditioner includes a control system for automatically adjusting the fan down-conversion rate as described in embodiment 3. The control system for automatically adjusting the frequency reduction rate of the fan is arranged on the air conditioner, so that the reliability of products is improved, and customer complaints are avoided.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the protection scope of the present application, and although the present application is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present application without departing from the spirit and scope of the technical solutions of the present application.
Claims (10)
1. The control method for automatically adjusting the frequency reduction rate of the fan is characterized in that the control method comprises the steps of detecting and obtaining the current value of the fan after the direct current fan operates, and judging whether a fan closing signal occurs in a unit according to the current value of the fan;
and if the unit is judged to have a fan closing signal, adjusting and reducing the current value of the fan by adopting a corresponding functional relation formula, and controlling the direct current fan to be safely stopped.
2. The control method for automatically adjusting the fan frequency reduction rate according to claim 1, wherein if the fan shutdown signal is determined to be present in the unit, the direct current fan is controlled to safely stop by adjusting and reducing the fan current value according to the corresponding functional relation formula as follows:
s1, after receiving a fan closing signal, judging that the current value of a fan is located in a current interval;
s2, determining a current interval where the fan current value is located, and regulating and reducing the fan current value by adopting a function relation formula in the current interval;
and S3, controlling the rotating speed of the fan to be reduced, and finally, completing shutdown actions of the fan after current change is completed until the fan is started next time and operating the program again.
3. The control method for automatically adjusting the fan frequency reduction rate according to claim 2, wherein the current interval comprises a current interval A, a current interval B and a current interval C; the current interval A is A1-A2; the current interval B is A2-B2; the current interval C is equal to or larger than B2 and equal to or smaller than C2; the A, B, C corresponds to actual fan current values in a current interval A, a current interval B and a current interval C respectively; the A1, the A2, the B2 and the C2 are preset current values.
4. The control method for automatically adjusting the fan frequency reduction rate according to claim 3, wherein in step S2,
if the current value of the fan is determined to be in a current interval A; the current value of the fan changes according to Y ═ k × (t) + (D);
y represents a current value real-time value, k represents a current change coefficient, t represents time after the fan receives a shutdown signal, and D represents a constant which is a unit current change revision value;
if the current value of the fan is determined to be in a current interval B; the fan current value is changed by Y1 ═ k1 ═ t1+ D1;
wherein Y1 represents a current value real-time value, k1 represents a current change coefficient, t1 represents time after the fan receives a shutdown signal, and D1 represents a current change revision value with a constant as a unit;
if the current value of the fan is determined to be in a current interval C; the fan current value is changed by Y2 ═ k2 ═ t2+ D2;
wherein, Y2 represents a current value real-time value, k2 represents a current change coefficient, t2 represents time after the fan receives a shutdown signal, and D2 represents a current change revision value with a constant as a unit.
5. The control method for automatically adjusting the fan frequency reduction rate according to claim 4, wherein in step S2, k is-2; d is 8; k1 ═ o; d1 ═ 5; k2 ═ 0.4; d2 ═ 3.5.
6. The control method for automatically adjusting the fan frequency reduction rate according to claim 3, wherein the preset current values A1, A2, B2 and C2 are respectively 3, 5, 7 and 10; the current interval A is more than or equal to 3 and less than or equal to 5; the current interval B is more than or equal to 5 and less than or equal to 7; the current interval C is more than or equal to 7 and less than or equal to 10.
7. The control method for automatically adjusting the fan frequency reduction rate according to claim 1, further comprising the step of continuing to operate the fan according to an original program if the fan shutdown signal is not determined to occur in the unit.
8. The control method for automatically adjusting the fan frequency reduction rate according to claim 1, wherein the fan current value is detected by a current sensor.
9. A storage medium for storing a program, wherein the stored program, when used by a processor, implements the method of controlling for automatically adjusting a fan down-conversion rate of any of claims 1 to 8.
10. The control system for automatically adjusting the frequency reduction rate of the fan comprises a processor and a memory; the control method for automatically adjusting the fan frequency reduction rate is characterized in that the memory stores a program, and the stored program is used by the processor to realize the control method for automatically adjusting the fan frequency reduction rate according to any one of claims 1 to 8.
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| CN105591584A (en) * | 2015-08-07 | 2016-05-18 | 青岛海信日立空调系统有限公司 | Air-conditioning fan control method and device |
| CN206017231U (en) * | 2016-08-31 | 2017-03-15 | 珠海格力电器股份有限公司 | Control circuit of low-voltage brushless direct current fan |
| CN110081575A (en) * | 2019-06-03 | 2019-08-02 | 珠海格力电器股份有限公司 | Frequency converter control method and device, frequency converter and air conditioner |
| CN110529418A (en) * | 2019-08-29 | 2019-12-03 | 浙江万可电气设备有限公司 | Underground fan control cabinet and control system |
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2019
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| JP2001178179A (en) * | 1999-12-06 | 2001-06-29 | Asia Vital Components Co Ltd | Drive circuit for variable-speed fan |
| US20090263110A1 (en) * | 2008-04-16 | 2009-10-22 | Caterpillar S.A.R.L. | Soft start motor control using back-EMF |
| CN102055394A (en) * | 2009-11-04 | 2011-05-11 | 株式会社日立产机系统 | Power converter device |
| CN102622007A (en) * | 2012-03-27 | 2012-08-01 | 中国人民解放军国防科学技术大学 | Energy-saving control method and device for cabinet |
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