CN115388516B - Fan rotating speed control method, control device and unit - Google Patents
Fan rotating speed control method, control device and unit Download PDFInfo
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- CN115388516B CN115388516B CN202211012975.7A CN202211012975A CN115388516B CN 115388516 B CN115388516 B CN 115388516B CN 202211012975 A CN202211012975 A CN 202211012975A CN 115388516 B CN115388516 B CN 115388516B
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Classifications
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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
- F24F11/32—Responding to malfunctions or emergencies
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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
-
- 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
-
- 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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/40—Damper positions, e.g. open or closed
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- 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)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The invention discloses a fan rotating speed control method, a fan rotating speed control device and a fan unit. Wherein the method comprises the following steps: determining a target rotating speed; determining an optimal rotating speed closest to the target rotating speed, and adjusting the rotating speed of the fan to the optimal rotating speed; the optimal rotating speed is determined according to noise, static pressure and target air quantity of a unit applying the fan. By the invention, the resonance of the fan and the shell can be avoided, noise is generated, the minimum noise of the unit is ensured, and the comfort level of a user is improved.
Description
Technical Field
The invention relates to the technical field of units, in particular to a fan rotating speed control method, a fan rotating speed control device and a fan unit.
Background
The installation environment of the unit (such as an air duct machine) is complex and various, the static pressure of the air outlet is changeable, and the static pressure mode is required to be debugged and selected during engineering installation so as to meet different static pressure requirements. When the static pressure of the air outlet of the unit changes, the fan resonates with the shell when reaching certain rotating speeds, so that noise is generated, the condition that the noise of the unit is negligent and small can occur in the process of adjusting the rotating speeds of the fan, and the user experience is affected.
Aiming at the problem that in the fan rotating speed adjusting process of a unit in the prior art, the fan resonates with a shell when reaching certain rotating speeds, so that noise is generated, no effective solution is proposed at present.
Disclosure of Invention
The embodiment of the invention provides a fan rotating speed control method, a control device and a fan rotating speed control unit, which are used for solving the problem that in the fan rotating speed adjustment process of the fan unit in the prior art, when the fan reaches a certain rotating speed, the fan resonates with a shell, so that noise is generated.
In order to solve the technical problems, the invention provides a fan rotating speed control method, which comprises the following steps:
Determining a target rotating speed;
Determining an optimal rotating speed closest to the target rotating speed, and adjusting the rotating speed of the fan to the optimal rotating speed; the optimal rotating speed is determined according to noise, static pressure and target air quantity of a unit applying the fan.
Further, the optimal rotation speed is determined according to noise, static pressure and target air quantity of a unit applying the fan, and the method comprises the following steps:
Determining target rotating speed ranges under different static pressure gears and different target air quantities;
And acquiring the rotating speed with the minimum noise in the range as the optimal rotating speed.
Further, determining a target rotating speed range under different static pressure gears and different target air quantities comprises the following steps:
And determining a target rotating speed range when the fan operates according to the highest fan gear under different static pressure gears, wherein the fan gears are divided according to target air quantity.
Further, the target rotating speed is determined according to the target air quantity of the fan.
Further, the target rotational speed is determined according to a target air volume of the fan, and includes:
Acquiring fan current and current fan rotating speed;
Adjusting the rotating speed of the fan according to the rated current of the fan corresponding to the current rotating speed of the fan and the current of the fan; the rated current corresponding to the current fan rotating speed is the fan current when the air quantity of the fan reaches the target air quantity.
Further, adjusting the fan rotation speed according to the fan rated current corresponding to the current fan rotation speed and the fan current, including:
If the deviation between the fan current and the fan rated current is larger than a preset threshold value and the fan current is smaller than the fan rated current, adjusting the fan rotating speed according to a first strategy to increase the fan rotating speed;
And if the deviation between the fan current and the rated fan current is larger than a preset threshold value and the fan current is larger than the rated fan current, adjusting the fan rotating speed according to a second strategy to reduce the fan rotating speed.
Further, according to the rated current of the fan corresponding to the current fan rotation speed and the fan current, the fan rotation speed is adjusted, and the method further comprises the following steps:
and if the deviation between the fan current and the rated current of the fan is smaller than or equal to the preset threshold value, keeping the current fan rotating speed unchanged.
Further, adjusting the fan rotation speed according to a first strategy to increase the fan rotation speed, including:
controlling the rotating speed of the fan to increase by a preset adjustment amount;
and then adjusting the rotating speed of the fan according to the change condition of the magnitude relation between the rated current of the fan corresponding to the current rotating speed of the fan and the current of the fan.
Further, adjusting the fan rotation speed according to the change condition of the magnitude relation between the fan rated current corresponding to the current fan rotation speed and the fan current, including:
Judging whether the magnitude relation between the rated current of the fan corresponding to the current rotating speed of the fan and the current of the fan is changed or not;
if so, the preset adjustment amount is controlled to be reduced, and then the rotating speed of the fan is adjusted according to the reduced preset adjustment amount and the direction opposite to the previous adjustment direction;
If not, the preset adjustment amount is controlled to be unchanged, and then the fan rotating speed is adjusted according to the preset adjustment amount and the direction which is the same as the previous adjustment direction.
Further, adjusting the fan rotation speed according to a second strategy to reduce the fan rotation speed, including:
Controlling the rotating speed of the fan to reduce a preset adjustment amount;
and then adjusting the rotating speed of the fan according to the change condition of the magnitude relation between the rated current of the fan corresponding to the current rotating speed of the fan and the current of the fan.
Further, adjusting the fan rotation speed according to the change condition of the magnitude relation between the fan rated current corresponding to the current fan rotation speed and the fan current, including:
Judging whether the magnitude relation between the rated current of the fan corresponding to the current rotating speed of the fan and the current of the fan is changed or not;
if so, the preset adjustment amount is controlled to be reduced, and then the rotating speed of the fan is adjusted according to the reduced preset adjustment amount and the direction opposite to the previous adjustment direction;
If not, the preset adjustment amount is controlled to be unchanged, and then the fan rotating speed is adjusted according to the preset adjustment amount and the direction which is the same as the previous adjustment direction.
The invention also provides a fan rotating speed control device, which comprises:
the determining module is used for determining the target rotating speed;
the execution module is used for determining the optimal rotating speed closest to the target rotating speed and adjusting the rotating speed of the fan to the optimal rotating speed; the optimal rotating speed is determined according to noise, static pressure and target air quantity of a unit applying the fan.
The invention also provides a unit comprising the fan and the fan rotating speed control device.
The present invention also provides a computer readable storage medium having stored thereon a computer program which when executed by a processor implements the above method.
After the target rotating speed is determined, the optimal rotating speed which is closest to the target rotating speed is determined, and the optimal rotating speed is determined in advance according to noise, static pressure and target air quantity of a unit applying the fan, so that the fan and the shell can be prevented from resonating, noise is generated, the noise of the unit is ensured to be minimum, and the comfort level of a user is improved.
Drawings
FIG. 1 is a block diagram of a unit embodying the present invention;
FIG. 2 is a flow chart of a fan speed control method according to an embodiment of the present invention;
FIG. 3 is a flowchart of determining an optimal rotational speed according to an embodiment of the present invention;
FIG. 4 is a flow chart of adjusting fan speed according to an embodiment of the present invention;
Fig. 5 is a block diagram of a fan speed device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, the "plurality" generally includes at least two.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
It should be understood that although the terms first, second, etc. may be used in embodiments of the present invention to describe the preset strategy, these preset strategies should not be limited to these terms. These terms are only used to distinguish between different preset strategies. For example, a first preset strategy may also be referred to as a second preset strategy, and similarly, a second preset strategy may also be referred to as a first preset strategy without departing from the scope of embodiments of the present invention.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrase "if determined" or "if detected (stated condition or event)" may be interpreted as "when determined" or "in response to determination" or "when detected (stated condition or event)" or "in response to detection (stated condition or event), depending on the context.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or device comprising such elements.
Alternative embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
The embodiment provides a fan rotating speed control method, which is applied to a unit, and fig. 1 is a structural diagram of the unit applying the invention, as shown in fig. 1, wherein the unit comprises: a control main board 1; the fan 2 comprises a motor and fan blades; an evaporator 3; and an air duct 4.
Fig. 2 is a flowchart of a fan speed control method according to an embodiment of the present invention, as shown in fig. 2, the method includes:
s101, determining a target rotating speed.
The target rotating speed is a parameter determined in the fan rotating speed adjusting process, and specifically refers to the rotating speed which needs to be reached by the fan.
S102, determining the optimal rotating speed closest to the target rotating speed, and adjusting the rotating speed of the fan to the optimal rotating speed; the optimal rotating speed is determined according to noise, static pressure and target air quantity of a unit applying the fan.
Because the fan resonates with the shell when reaching certain rotating speeds, noise is generated, the noise, static pressure and target air quantity of the unit of the fan are used for determining the optimal rotating speed on the premise that the target rotating speed is met, and the rotating speed of the fan is adjusted to the optimal rotating speed, so that the noise of the unit is minimized.
According to the fan rotating speed control method, after the target rotating speed is determined, the optimal rotating speed which is closest to the target rotating speed is determined, and the optimal rotating speed is determined in advance according to noise, static pressure and target air quantity of a unit applying the fan, so that the fan and a shell can be prevented from resonating, noise is generated, the noise of the unit is guaranteed to be minimum, and comfort level of a user is improved.
In a specific implementation, the optimal rotation speed is determined according to noise, static pressure and target air quantity of a unit applying a fan, and the method comprises the following steps: determining target rotating speed ranges under different static pressure gears and different target air quantities; and acquiring the rotating speed with the minimum noise in the range as the optimal rotating speed.
Because under the unchangeable condition of fan static pressure, the higher the rotational speed of fan, the more the amount of wind is, and the noise is bigger, consequently, if the target amount of wind is great, under the higher condition of rotational speed, the noise can reach minima, then under the lower condition of target amount of wind, the fan rotational speed, the noise also can reach minima, consequently, confirm the target rotational speed scope under different static pressure gears, different target amount of wind, include: and determining a target rotating speed range when the fan operates according to the highest fan gear under different static pressure gears, wherein the fan gears are divided according to target air quantity.
The corresponding optimal rotational speeds for different air-out static pressure gears and fan gears (abbreviated as wind gears in the table) are shown in the following table 1:
table 1 corresponding optimum tachometer for different outlet air static pressure gear and fan gear
Wherein, S4, S8, … S4n are the optimal rotation speeds under different air outlet static pressures.
Fig. 3 is a flowchart of determining an optimal rotational speed according to an embodiment of the present invention, and as shown in fig. 3, the determination of the optimal rotational speed may be achieved by the following preferred implementation steps:
s11, acquiring a target rotating speed N.
S12, comparing the difference delta S1, delta S2 … delta Sn between the target rotating speed N and the optimal rotating speed under each air outlet static pressure.
And S13, taking the minimum value delta S in delta S1 and delta S2 … delta Sn, and determining the optimal rotation speed S corresponding to the minimum value delta S.
And S14, determining the optimal rotating speed S as the final rotating speed of the fan.
S15, completing debugging and exiting.
In order to ensure that the unit operates according to the target air quantity, the target rotating speed is determined according to the target air quantity of the fan.
When the constant air quantity is operated, the air quantity of the fan needs to keep the target air quantity, under the condition that the static pressure of the fan is unchanged, the higher the rotating speed of the fan is, the larger the air quantity is, but if the static pressure of the fan is increased, the air quantity of the fan is reduced under the same rotating speed of the fan, therefore, under the condition that the static pressure of the fan is increased, if the air quantity is also required to be unchanged, the rotating speed of the fan is increased, and under the normal condition, the measurement of the static pressure of the fan is complex, therefore, under the condition that each rotating speed of the fan is obtained by measurement, the current when the fan reaches the target air quantity, namely the rated current of the fan corresponding to different rotating speeds of the fan, is compared with the rated current of the fan, and if the current of the actual fan is smaller than the rated current of the fan, the air quantity is not up to the target air quantity, and the rotating speed of the fan is required to be increased. Therefore, the target rotating speed is determined according to the target air quantity of the fan, and comprises the following steps: acquiring fan current and current fan rotating speed; adjusting the rotating speed of the fan according to the rated current of the fan corresponding to the current rotating speed of the fan and the current of the fan; the rated current corresponding to the current fan rotating speed is the fan current when the air quantity of the fan reaches the target air quantity.
In a specific implementation, the same set of equipment has a linear relationship between the fan speed n and the fan current I, i=an+b, and the values of a and B are fixed values, and once the equipment determines the values of a and B. A is positive value, therefore, the higher the fan rotating speed is, the larger the fan current is, when the fan current reaches the rated current of the fan, the fan rotating speed reaches the target rotating speed, and the fan air volume reaches the target air volume, wherein the fan rotating speed at this moment is the ideal fan rotating speed, but in actual operation, the fan rotating speed is difficult to ensure to be adjusted to the ideal fan rotating speed, if the ideal fan rotating speed is pursued, a large amount of time is consumed by a unit to adjust the rotating speed, and the normal operation is influenced, therefore, the fan rotating speed is only required to be controlled within a certain range, and the fan air volume is controlled to fluctuate within a certain error range of the target air volume. In order to control the fluctuation of the air quantity of the fan within a certain range, the fan rotating speed is adjusted according to the rated current of the fan corresponding to the current fan rotating speed and the fan current, and the method comprises the following steps: if the deviation between the fan current and the fan rated current is larger than a preset threshold value and the fan current is smaller than the fan rated current, adjusting the fan rotating speed according to a first strategy to increase the fan rotating speed; if the deviation between the fan current and the fan rated current is larger than a preset threshold value and the fan current is larger than the fan rated current, adjusting the fan rotating speed according to a second strategy to reduce the fan rotating speed; and if the deviation between the fan current and the rated current of the fan is smaller than or equal to the preset threshold value, keeping the current fan rotating speed unchanged. If the accuracy requirement for the fan speed is high, the preset threshold may be set to zero.
In order to achieve rapid adjustment of the rotational speed of the fan to achieve or approach the desired rotational speed of the fan, adjusting the rotational speed of the fan according to a first strategy to increase the rotational speed of the fan, comprising: controlling the rotating speed of the fan to increase by a preset adjustment amount; and then adjusting the rotating speed of the fan according to the change condition of the magnitude relation between the fan current and the rated current of the fan.
Specifically, the fan rotating speed is adjusted according to the change condition of the magnitude relation between the fan current and the rated current of the fan, and the method comprises the following steps: judging whether the magnitude relation between the rated current of the fan corresponding to the current rotating speed of the fan and the current of the fan is changed or not; if so, indicating that the rated current of the fan is crossed during adjustment, and adjusting the rotating speed of the fan in the opposite direction, wherein the preset adjustment amount is reduced, so that the preset adjustment amount is controlled to be reduced, and then adjusting the rotating speed of the fan according to the reduced preset adjustment amount and the direction opposite to the previous adjustment direction; if not, the rated current of the fan is not reached, and the fan rotating speed needs to be continuously adjusted in the same direction, so that the preset adjusting amount is controlled to be unchanged, and then the fan rotating speed is adjusted according to the preset adjusting amount and the direction same as the previous adjusting direction. In the adjustment process, whether the deviation between the fan current and the rated current of the fan is smaller than or equal to the preset threshold value or not needs to be judged in real time, and if so, the rotating speed of the fan is controlled not to change any more.
Similarly, adjusting the fan speed according to a second strategy to reduce the fan speed includes: controlling the rotating speed of the fan to reduce a preset adjustment amount; and then adjusting the rotating speed of the fan according to the change condition of the magnitude relation between the rated current of the fan and the current of the fan corresponding to the current rotating speed of the fan.
Specifically, the fan rotating speed is adjusted according to the change condition of the magnitude relation between the rated current of the fan and the current of the fan corresponding to the current fan rotating speed, and the method comprises the following steps: judging whether the magnitude relation between the rated current of the fan corresponding to the current rotating speed of the fan and the current of the fan is changed or not; if so, indicating that the rated current of the fan is crossed during adjustment, and adjusting the rotating speed of the fan in the opposite direction, wherein the preset adjustment amount is reduced, so that the preset adjustment amount is controlled to be reduced, and then adjusting the rotating speed of the fan according to the reduced preset adjustment amount and the direction opposite to the previous adjustment direction; if not, the rated current of the fan is not reached, and the fan rotating speed needs to be continuously adjusted in the same direction, so that the preset adjustment amount is controlled to be unchanged, and then the fan rotating speed is adjusted according to the preset adjustment amount and the direction which is the same as the previous adjustment direction. In the adjustment process, whether the deviation between the fan current and the rated current of the fan is smaller than or equal to the preset threshold value or not needs to be judged in real time, and if so, the rotating speed of the fan is controlled not to change any more.
As described above, the rated current of the fan is a reference current value for adjusting the rotation speed of the fan, and therefore, before adjusting the rotation speed of the fan according to the rated current of the fan corresponding to the current rotation speed of the fan, the method further includes: and obtaining the rated current of the fan corresponding to the current rotating speed of the fan. In the system, a corresponding relation between the rotating speed of the fan and the rated current of the fan is stored, and the corresponding relation is obtained by the following modes: simulating different static pressure environments, and adjusting the rotating speed of the fan under the different static pressure environments so as to adjust the air output of the fan; and determining the fan current when the fan air output reaches the target air output, and taking the fan current as the rated current of the fan corresponding to the rotating speed of the fan.
Fig. 4 is a flowchart of adjusting a rotation speed of a fan according to an embodiment of the present invention, as shown in fig. 4, specifically including:
S1, entering a constant air volume debugging mode.
S2, detecting the current fan rotating speed N0 and the fan current I.
S3, judging whether the I-I Forehead (forehead) │≤I Tolerance of is satisfied, if so, executing the step S4, and if not, executing the step S5.
During the rotational speed adjustment, when I-I Forehead (forehead) │≥I Tolerance of , it is indicated that the error between the fan current I and the rated current I Forehead (forehead) is large, and the adjustment needs to be continued. I Tolerance of is the maximum allowable deviation value of the fan current, which is equivalent to the preset threshold value, and can be determined in advance through experiments, and can be set to 0 when the adjustment accuracy requirement is high.
S4, finishing fan rotation speed adjustment.
S5, judging whether the I is smaller than I Forehead (forehead) or not, if so, executing a step S6; if not, step S7 is performed.
S6, controlling the rotating speed of the fan to be reduced by a preset adjustment amount.
S7, controlling the rotating speed of the fan to increase by a preset adjustment amount.
S8, judging whether the I-I Forehead (forehead) │≤I Tolerance of is satisfied, if so, executing the step S4, and if not, executing the step S9.
S9, judging whether the size relation between the I and the I amount is changed, if so, executing the step S10, and if not, executing the step S11.
S10, controlling the preset adjustment amount to be reduced, and adjusting the rotating speed of the fan in the direction opposite to the previous direction.
S11, controlling the preset adjustment amount to be unchanged, and adjusting the rotating speed of the fan according to the direction communicated with the previous time.
Example 2
The embodiment provides a fan rotating speed control device, which is applied to a unit, and fig. 5 is a mechanism block diagram of the fan rotating speed device according to an embodiment of the invention, as shown in fig. 5, the method includes:
the determining module 10 is configured to determine a target rotational speed, where the target rotational speed is a parameter determined during a fan rotational speed adjustment process, and specifically refers to a rotational speed that needs to be reached by the fan.
The execution module 20 is configured to determine an optimal rotation speed closest to the target rotation speed, adjust the rotation speed of the fan to the optimal rotation speed, and finally make the fan operate according to the optimal rotation speed to generate wind close to the target wind volume, and discharge the wind to the wind channel; the optimal rotating speed is determined according to noise, static pressure and target air quantity of a unit applying the fan.
In the fan rotation speed control device of the embodiment, after the determining module 10 determines the target rotation speed, the executing module 20 determines the optimal rotation speed closest to the target rotation speed, and adjusts the rotation speed of the fan to the optimal rotation speed, wherein the optimal rotation speed is determined according to the noise, the static pressure and the target air volume of the unit applying the fan, so that the resonance of the fan and the shell can be avoided, the noise is generated, the noise of the unit is ensured to be minimum, and the comfort level of a user is improved.
In particular implementations, execution module 20 is specifically configured to: determining target rotating speed ranges under different static pressure gears and different target air quantities; and acquiring the rotating speed with the minimum noise in the range as the optimal rotating speed.
Under the condition that the static pressure of the fan is unchanged, the higher the rotating speed of the fan is, the larger the air quantity is, and the larger the noise is, therefore, if the target air quantity is larger, the noise can be minimized under the condition that the rotating speed is higher, and under the condition that the target air quantity is lower and the rotating speed of the fan is lower, the noise can also be minimized, and the specific execution operation of the execution module 20 is as follows: and determining a target rotating speed range when the fan operates according to the highest fan gear under different static pressure gears, wherein the fan gears are divided according to target air quantity.
In order to ensure that the unit operates according to the target air quantity, the target rotating speed is determined according to the target air quantity of the fan.
When the constant air quantity is operated, the air quantity of the fan needs to keep the target air quantity, under the condition that the static pressure of the fan is unchanged, the higher the rotating speed of the fan is, the larger the air quantity is, but if the static pressure of the fan is increased, the air quantity of the fan is reduced under the same rotating speed of the fan, therefore, under the condition that the static pressure of the fan is increased, if the air quantity is also required to be unchanged, the rotating speed of the fan is increased, and under the normal condition, the measurement of the static pressure of the fan is complex, therefore, under the condition that each rotating speed of the fan is obtained by measurement, the current when the fan reaches the target air quantity, namely the rated current of the fan corresponding to different rotating speeds of the fan, is compared with the rated current of the fan, and if the current of the actual fan is smaller than the rated current of the fan, the air quantity is not up to the target air quantity, and the rotating speed of the fan is required to be increased. Therefore, the above-mentioned determination module 10 is specifically for: acquiring fan current and current fan rotating speed; adjusting the rotating speed of the fan according to the rated current of the fan corresponding to the current rotating speed of the fan and the current of the fan; the rated current corresponding to the current fan rotating speed is the fan current when the air quantity of the fan reaches the target air quantity.
In a specific implementation, the same set of equipment has a linear relationship between the fan speed n and the fan current I, i=an+b, and the values of a and B are fixed values, and once the equipment determines the values of a and B. A is positive value, therefore, the higher the fan rotating speed is, the larger the fan current is, when the fan current reaches the rated current of the fan, the fan rotating speed reaches the target rotating speed, and the fan air volume reaches the target air volume, wherein the fan rotating speed at this moment is the ideal fan rotating speed, but in actual operation, the fan rotating speed is difficult to ensure to be adjusted to the ideal fan rotating speed, if the ideal fan rotating speed is pursued, a large amount of time is consumed by a unit to adjust the rotating speed, and the normal operation is influenced, therefore, the fan rotating speed is only required to be controlled within a certain range, and the fan air volume is controlled to fluctuate within a certain error range of the target air volume. In order to control the fluctuation of the fan air quantity within a certain range, the determining module 10 is specifically configured to: when the deviation between the fan current and the rated fan current is larger than a preset threshold value and the fan current is smaller than the rated fan current, adjusting the fan rotating speed according to a first strategy to increase the fan rotating speed; when the deviation between the fan current and the rated fan current is larger than a preset threshold value and the fan current is larger than the rated fan current, adjusting the fan rotating speed according to a second strategy to reduce the fan rotating speed; and when the deviation between the fan current and the rated current of the fan is smaller than or equal to the preset threshold value, keeping the current fan rotating speed unchanged. If the accuracy requirement for the fan speed is high, the preset threshold may be set to zero.
In order to achieve rapid adjustment of the rotational speed of the fan to achieve the desired rotational speed of the fan or to approach the desired rotational speed of the fan, the determining module 10 adjusts the rotational speed of the fan according to the first strategy, so that when the rotational speed of the fan is increased, the specific operations are performed as follows: controlling the rotating speed of the fan to increase by a preset adjustment amount; and then adjusting the rotating speed of the fan according to the change condition of the magnitude relation between the fan current and the rated current of the fan.
Specifically, the determining module 10 is configured to: judging whether the magnitude relation between the rated current of the fan corresponding to the current rotating speed of the fan and the current of the fan is changed or not; if so, indicating that the rated current of the fan is crossed during adjustment, and adjusting the rotating speed of the fan in the opposite direction, wherein the preset adjustment amount is reduced, so that the preset adjustment amount is controlled to be reduced, and then adjusting the rotating speed of the fan according to the reduced preset adjustment amount and the direction opposite to the previous adjustment direction; if not, the rated current of the fan is not reached, and the fan rotating speed needs to be continuously adjusted in the same direction, so that the preset adjusting amount is controlled to be unchanged, and then the fan rotating speed is adjusted according to the preset adjusting amount and the direction same as the previous adjusting direction.
Similarly, the determining module 10 adjusts the fan speed according to the second strategy, so that when the fan speed is reduced, the specifically performed operations are: controlling the rotating speed of the fan to reduce a preset adjustment amount; and then adjusting the rotating speed of the fan according to the change condition of the magnitude relation between the rated current of the fan and the current of the fan corresponding to the current rotating speed of the fan.
Specifically, the determining module 10 is configured to: judging whether the magnitude relation between the rated current of the fan corresponding to the current rotating speed of the fan and the current of the fan is changed or not; if so, indicating that the rated current of the fan is crossed during adjustment, and adjusting the rotating speed of the fan in the opposite direction, wherein the preset adjustment amount is reduced, so that the preset adjustment amount is controlled to be reduced, and then adjusting the rotating speed of the fan according to the reduced preset adjustment amount and the direction opposite to the previous adjustment direction; if not, the rated current of the fan is not reached, and the fan rotating speed needs to be continuously adjusted in the same direction, so that the preset adjustment amount is controlled to be unchanged, and then the fan rotating speed is adjusted according to the preset adjustment amount and the direction which is the same as the previous adjustment direction.
As previously described, the fan rated current is a reference current value for adjusting the fan rotational speed, and thus the determination module 10 is also configured to: and obtaining the rated current of the fan corresponding to the current rotating speed of the fan. In the system, a corresponding relation between the rotating speed of the fan and the rated current of the fan is stored, and the corresponding relation is obtained by the following modes: simulating different static pressure environments, and adjusting the rotating speed of the fan under the different static pressure environments so as to adjust the air output of the fan; and determining the fan current when the fan air output reaches the target air output, and taking the fan current as the rated current of the fan corresponding to the rotating speed of the fan.
Example 3
The embodiment provides a unit, including the fan, still include the fan rotational speed controlling means among the above-mentioned embodiment for can avoid fan and casing resonance, produce the noise, guarantee that the noise of unit is minimum, improve user's comfort level.
Example 4
The present embodiment provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the fan speed control method of the above embodiment.
The apparatus embodiments described above are merely illustrative, wherein the modules illustrated as separate components may or may not be physically separate, and the components shown as modules may or may not be physical, i.e., may be located in one place, or may be distributed over a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (12)
1. A method for controlling the rotational speed of a fan, the method comprising:
Determining a target rotating speed;
Determining an optimal rotating speed closest to the target rotating speed, and adjusting the rotating speed of the fan to the optimal rotating speed; the optimal rotating speed is determined according to noise, static pressure and target air quantity of a unit applying a fan, and the method comprises the following steps: determining a target rotating speed range when a fan runs according to the highest fan gear under different static pressure gears, wherein the fan gears are divided according to target air quantity; and acquiring the rotating speed with the minimum noise in the range as the optimal rotating speed.
2. The method of claim 1, wherein the target rotational speed is determined based on a target air volume of the blower.
3. The method of claim 2, wherein the target rotational speed is determined based on a target air volume of the blower, comprising:
Acquiring fan current and current fan rotating speed;
Adjusting the rotating speed of the fan according to the rated current of the fan corresponding to the current rotating speed of the fan and the current of the fan; the rated current corresponding to the current fan rotating speed is the fan current when the air quantity of the fan reaches the target air quantity.
4. A method according to claim 3, wherein adjusting the fan speed based on the fan rated current corresponding to the current fan speed and the fan current comprises:
If the deviation between the fan current and the fan rated current is larger than a preset threshold value and the fan current is smaller than the fan rated current, adjusting the fan rotating speed according to a first strategy to increase the fan rotating speed;
And if the deviation between the fan current and the rated fan current is larger than a preset threshold value and the fan current is larger than the rated fan current, adjusting the fan rotating speed according to a second strategy to reduce the fan rotating speed.
5. The method of claim 4, wherein adjusting the fan speed based on the fan rated current corresponding to the current fan speed and the fan current further comprises:
and if the deviation between the fan current and the rated current of the fan is smaller than or equal to the preset threshold value, keeping the current fan rotating speed unchanged.
6. The method of claim 4, wherein adjusting the fan speed to increase the fan speed according to a first strategy comprises:
controlling the rotating speed of the fan to increase by a preset adjustment amount;
and then adjusting the rotating speed of the fan according to the change condition of the magnitude relation between the rated current of the fan corresponding to the current rotating speed of the fan and the current of the fan.
7. The method of claim 6, wherein adjusting the fan speed based on a change in a magnitude relationship between a fan rated current corresponding to a present fan speed and the fan current comprises:
Judging whether the magnitude relation between the rated current of the fan corresponding to the current rotating speed of the fan and the current of the fan is changed or not;
if so, the preset adjustment amount is controlled to be reduced, and then the rotating speed of the fan is adjusted according to the reduced preset adjustment amount and the direction opposite to the previous adjustment direction;
If not, the preset adjustment amount is controlled to be unchanged, and then the fan rotating speed is adjusted according to the preset adjustment amount and the direction which is the same as the previous adjustment direction.
8. The method of claim 4, wherein adjusting the fan speed in accordance with a second strategy to reduce the fan speed comprises:
Controlling the rotating speed of the fan to reduce a preset adjustment amount;
and then adjusting the rotating speed of the fan according to the change condition of the magnitude relation between the rated current of the fan corresponding to the current rotating speed of the fan and the current of the fan.
9. The method of claim 8, wherein adjusting the fan speed based on a change in a magnitude relationship between a fan rated current corresponding to a present fan speed and the fan current comprises:
Judging whether the magnitude relation between the rated current of the fan corresponding to the current rotating speed of the fan and the current of the fan is changed or not;
if so, the preset adjustment amount is controlled to be reduced, and then the rotating speed of the fan is adjusted according to the reduced preset adjustment amount and the direction opposite to the previous adjustment direction;
If not, the preset adjustment amount is controlled to be unchanged, and then the fan rotating speed is adjusted according to the preset adjustment amount and the direction which is the same as the previous adjustment direction.
10. A fan speed control apparatus, the apparatus comprising:
the determining module is used for determining the target rotating speed;
The execution module is used for determining the optimal rotating speed closest to the target rotating speed and adjusting the rotating speed of the fan to the optimal rotating speed; the optimal rotating speed is determined according to noise, static pressure and target air quantity of a unit applying a fan, and the method comprises the following steps: determining a target rotating speed range when a fan runs according to the highest fan gear under different static pressure gears, wherein the fan gears are divided according to target air quantity; and acquiring the rotating speed with the minimum noise in the range as the optimal rotating speed.
11. A unit comprising a fan, further comprising the fan speed control apparatus of claim 10.
12. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the method according to any one of claims 1 to 9.
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| CN115930402A (en) * | 2023-01-13 | 2023-04-07 | 南京天加环境科技有限公司 | Control method and device of air conditioner |
| CN115930394A (en) * | 2023-01-13 | 2023-04-07 | 南京天加环境科技有限公司 | Air conditioner control method and device, air conditioner, electronic equipment and storage medium |
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| JP2005055159A (en) * | 2003-08-04 | 2005-03-03 | Royal Electric Co Ltd | Fan for ventilation system |
| JP2012241969A (en) * | 2011-05-18 | 2012-12-10 | Mitsubishi Heavy Ind Ltd | Air volume adjustment device for air conditioner |
| US9568204B2 (en) * | 2013-01-31 | 2017-02-14 | Johnson Controls Technology Company | Systems and methods for rapid disturbance detection and response |
| CN103968500B (en) * | 2013-02-04 | 2016-04-13 | 珠海格力电器股份有限公司 | air conditioner air volume static pressure curve processing method and air conditioner |
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