CN114322113A - Air conditioner outdoor unit and vibration reduction method thereof - Google Patents
Air conditioner outdoor unit and vibration reduction method thereof Download PDFInfo
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Abstract
The invention discloses an air conditioner outdoor unit and a vibration reduction method thereof, the air conditioner outdoor unit comprises a first wind wheel, a second wind wheel, a heat exchanger and a compressor, the first wind wheel and the second wind wheel are axially arranged at intervals, the heat exchanger is arranged opposite to the first wind wheel and the second wind wheel, the first wind wheel and the second wind wheel are used for guiding airflow to pass through the heat exchanger, the compressor is arranged in the heat exchanger and is used for realizing heat exchange by matching with the heat exchanger, wherein any two of the first rotating frequency of the first wind wheel, the second rotating frequency of the second wind wheel and the working frequency of the compressor meet the following requirements: the absolute value of the difference value between one or two times of any two of the two air conditioners and one or two times of the other air conditioner is larger than or equal to 3, so that the beat vibration or resonance phenomenon generated between the compressor and any two of the first wind wheel and the second wind wheel can be reduced or eliminated, the noise of the air conditioner outdoor unit is reduced, the hidden danger of structural damage is reduced, and the reliability of the air conditioner outdoor unit is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner outdoor unit and a vibration reduction method of the air conditioner outdoor unit.
Background
The traditional single wind wheel fan is widely used in various kinds of ventilation equipment, such as an air conditioner outdoor unit and the like. Among air-conditioning products, the variable frequency air conditioner has the characteristics of energy conservation, high efficiency and the like, and is beneficial to solving the increasingly harsh energy environment problem.
The inventor of the application discovers in long-term research and development that the rotating frequency of a wind wheel of a fan can generate beat vibration or resonance under certain conditions, so that huge noise is generated, and meanwhile, the hidden trouble of structural damage exists.
Disclosure of Invention
The invention provides an air conditioner outdoor unit and a vibration reduction method thereof, which aim to solve the technical problem that the air conditioner outdoor unit generates beat vibration or resonance in the prior art.
In order to solve the above technical problem, one technical solution adopted by the present invention is to provide an outdoor unit of an air conditioner, including:
the first wind wheel and the second wind wheel are arranged at intervals along the axial direction;
the heat exchanger is arranged opposite to the first wind wheel and the second wind wheel;
the compressor is arranged in the heat exchanger;
wherein any two of the first rotational frequency of the first wind turbine, the second rotational frequency of the second wind turbine, and the operating frequency of the compressor satisfy: the absolute value of the difference between one or two times of one of the arbitrary two and one or two times of the other is greater than or equal to 3.
In an embodiment, the outdoor unit further includes an air volume detector and a controller, the controller is configured to control the first wind wheel to transition from a first starting speed V10 to a first target speed V1, and the second wind wheel to transition from a second starting speed V20 to a second target speed V2, so that the air volume detected by the air volume detector reaches a target air volume Qt.
In a specific embodiment, the outdoor unit of the air conditioner further includes a processor, and the processor is connected to the controller and the air volume detector, respectively, and is configured to calculate a rotation speed Vt that the first wind wheel and the second wind wheel need to be changed, where V1 is V10+ Vt, and V2 is V20+ Vt.
In one embodiment, the first rotation frequency F1, the second rotation frequency F2, and the operating frequency F3 satisfy the following relationship: and | j F3-k F1| ≧ 5 and | j F3-k F2| ≧ 5, j and k are 1 or 2 respectively.
In a specific embodiment, the outdoor unit of the air conditioner further includes a controller, and a first driving member and a second driving member connected to the controller, wherein the first driving member is connected to the first wind wheel, and the second driving member is connected to the second wind wheel.
In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a vibration reduction method for an outdoor unit of an air conditioner, including:
acquiring any two of a first rotating frequency of a first wind wheel, a second rotating frequency of a second wind wheel and a working frequency of a compressor;
judging whether any two of the two satisfy the conditions: the absolute value of the difference between one or two times of one of the arbitrary two and one or two times of the other is greater than or equal to 3;
if the condition is not met, adjusting the rotating speed of the first wind wheel and/or the second wind wheel so as to meet the condition.
In a specific embodiment, the method for obtaining the first rotation frequency and the second rotation frequency includes:
acquiring a first initial rotating speed V10 of the first wind wheel and a second initial rotating speed V20 of the second wind wheel;
calculating the rotating speed Vt of the first wind wheel and the second wind wheel to be converted;
calculating a first target rotating speed V1 ═ V10+ Vt of the first wind wheel and a second target rotating speed V2 ═ V20+ Vt of the second wind wheel;
and calculating the first rotation frequency F1 ═ V1 × (B) 1/60 and the second rotation frequency F2 ═ V2 × (B) 2/60, wherein B1 is the number of blades of the first wind wheel and B2 is the number of blades of the second wind wheel.
In one embodiment, Vt is 0 if Qt is Q0 and Vt is 0 if Qt is Q0.
In a specific embodiment, if the first and second rotational frequencies F1, F2 do not satisfy the condition, the method of adjusting the rotational speed of the first and/or second wind turbine to satisfy the condition comprises:
reducing the rotational speed of one of the first wind wheel and the second wind wheel such that | m x F1-n x F2| ≧ 3;
the rotation speed of the other one is increased so that the air volume reaches the target air volume Qt.
In a specific embodiment, the method further comprises:
detecting the vibration amplitude of the air conditioner outdoor unit;
judging whether the vibration amplitude is larger than a preset vibration amplitude or not;
if so, reducing the rotating speed of one of the first wind wheel and the second wind wheel, and increasing the rotating speed of the other one of the first wind wheel and the second wind wheel so as to enable the vibration amplitude to be smaller than or equal to the preset vibration amplitude.
In a specific embodiment, the method specifically includes:
acquiring the first rotating frequency F1, the second rotating frequency F2 and the working frequency F3;
calculating a shielding interval of a first target rotating speed of the first wind wheel and a second target rotating speed of the second wind wheel according to the conditions;
calculating the first target rotating speed and the second target rotating speed;
judging whether the first target rotating speed or the second target rotating speed is in the shielding interval;
if the first target rotating speed or the second target rotating speed is within the shielding interval, reducing one of the first target rotating speed and the second target rotating speed, and increasing the other one of the first target rotating speed and the second target rotating speed so that the first target rotating speed and the second target rotating speed are both located outside the shielding interval, and the air volume corresponding to the adjusted first target rotating speed and the second target rotating speed is the target air volume.
The air conditioner outdoor unit comprises a first wind wheel and a second wind wheel which are axially arranged at intervals, a heat exchanger which is arranged opposite to the first wind wheel and the second wind wheel, and a compressor which is arranged in the heat exchanger, wherein any two of the first rotating frequency of the first wind wheel, the second rotating frequency of the second wind wheel and the working frequency of the compressor meet the following requirements: the absolute value of the difference value between one or two times of any two of the two air conditioners and one or two times of the other air conditioner is larger than or equal to 3, so that the beat vibration or resonance phenomenon generated between the compressor and any two of the first wind wheel and the second wind wheel can be reduced or eliminated, the noise of the air conditioner outdoor unit is reduced, the hidden danger of structural damage is reduced, and the reliability of the air conditioner outdoor unit is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
fig. 1 is a schematic perspective view of an outdoor unit of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of an outdoor unit of an air conditioner according to an embodiment of the present invention;
FIG. 3 is a schematic diagram showing the relationship between the air volume and the noise of the fan set and the single fan in the outdoor unit of the air conditioner according to the embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating the relationship between the rotational frequency and the noise of a fan set and a single fan in an outdoor unit of an air conditioner according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating an embodiment of a vibration reduction method for an outdoor unit of an air conditioner according to the present invention;
fig. 6 is a schematic flowchart illustrating a vibration reduction method for an outdoor unit of an air conditioner according to another embodiment of the present invention;
fig. 7 is a schematic flowchart illustrating a vibration reduction method for an outdoor unit of an air conditioner according to another embodiment of the present invention;
fig. 8 is a flowchart illustrating a vibration reduction method for an outdoor unit of an air conditioner according to another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The terms "first" and "second" in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. While the term "and/or" is merely one type of association that describes an associated object, it means that there may be three types of relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Referring to fig. 1 and 2, an embodiment of an outdoor unit 10 of an air conditioner according to the present invention includes a first wind wheel 100, a second wind wheel 200, a heat exchanger 300, and a compressor 400, where the first wind wheel 100 and the second wind wheel 200 are axially spaced, the heat exchanger 300 is disposed opposite to the first wind wheel 100 and the second wind wheel 200, the first wind wheel 100 and the second wind wheel 200 are used for guiding an airflow through the heat exchanger 300, and the compressor 400 is disposed in the heat exchanger 300 and is used for implementing heat exchange by cooperating with the heat exchanger 300, where any two of a first rotation frequency of the first wind wheel 100, a second rotation frequency of the second wind wheel 200, and an operating frequency of the compressor 400 satisfy: the absolute value of the difference between one or two times of any two of the two wind wheels and one or two times of the other wind wheel is greater than or equal to 3, so that the beat vibration or resonance phenomenon generated between the compressor 400 and any two of the first wind wheel 100 and the second wind wheel 200 can be reduced or eliminated, the noise of the air-conditioning outdoor unit 10 is reduced, the hidden danger of structural damage is reduced, and the reliability of the air-conditioning outdoor unit 10 is improved.
In an embodiment, the first wind wheel 110 and the second wind wheel 120 are axial flow wind wheels, and the airflow flowing through the heat exchanger is extracted from the air conditioner outdoor unit 10 by means of radial air inlet and axial air outlet to be sent to the outside.
In an embodiment, the outdoor unit 10 is in a top-outlet type, and in other embodiments, the outdoor unit may also be in a bottom-outlet type or a side-outlet type, which is not limited herein.
Specifically, in an embodiment, the first rotation frequency F1 and the second rotation frequency F2 satisfy the following relationship: i m × F1-n × F2| ≧ 3, where m and n are 1 or 2 respectively, for example, | m × F1-n × F2| ═ 3, | m × F1-n × F2| ═ 4 or | m × F1-n × F2| -5, can reduce or eliminate the resonance phenomenon that produces between first wind wheel 100 and second wind wheel 200, and then reduce the noise that produces of the fan group of first wind wheel 100 and second wind wheel 200.
In one embodiment, the first rotation frequency F1, the second rotation frequency F2, and the operation frequency F3 satisfy the following relationship: f3-k F1| ≧ 5 and | j F3-k F2| ≧ 5, j and k are 1 or 2 respectively, for example, | j F3-k F1| 3 and | j F3-k F2| -3, | j F3-k F1| -4 and | j F3-k F2| -4 or | j F3-k F1| -5 and | j F3-k F2| -5, respectively, can reduce or eliminate the phenomenon of flapping between the first and second vanes 100 and 200 and the compressor 400, respectively, and thus reduce the noise of the air conditioner 10.
In an embodiment, the outdoor unit 10 may further include an air volume detector 500, a controller (not shown), and a processor (not shown), where the processor is connected to the controller and the air volume detector 500, respectively, and defines a starting air volume Q0 corresponding to the first starting rotation speed V10 and the second starting rotation speed V20, a target air volume Qt corresponding to the first target rotation speed V1 and the second target rotation speed, and the processor is configured to calculate a rotation speed Vt that the first wind turbine 100 and the second wind turbine 200 need to be shifted according to the target air volume Qt and the starting air volume Q0, where V1 is V10+ Vt, and V2 is V20+ Vt; the air volume detector 500 is used for detecting the air volume flowing through the first wind wheel 100 and the second wind wheel 200, the controller is used for controlling the first wind wheel 100 to be converted from the first initial rotating speed V10 to the first target rotating speed V1, and controlling the second wind wheel 200 to be converted from the second initial rotating speed V20 to the second target rotating speed V2, so that the air volume flowing through the first wind wheel 100 and the second wind wheel 200 reaches the target air volume Qt, and further the first rotating frequency F1 and the second rotating frequency F2 can be respectively calculated through the first target rotating speed V1 and the second target rotating speed V2.
In an embodiment, first wind rotor 100 and second wind rotor 200 respectively include a plurality of blades, and the number of blades B1 of first wind rotor 100, the number of blades B2 of second wind rotor 200, first target rotation speed V1rpm of first wind rotor 100, second target rotation speed V2rpm of second wind rotor 200, first rotation frequency F1, and second rotation frequency F2 satisfy the following relationships: f1 ═ V1 × B1/60, F2 ═ V2 × B2/60.
In an embodiment, the air volume detector 500 may be an air velocity sensor, and the air volume may be obtained by calculating the air velocity and the sectional area of the airflow channel, and further, the first initial rotation speed V10 and the second initial rotation speed V20 may be adjusted by the pre-measured air volume, and then the rotation speeds of the first wind wheel 100 and the second wind wheel 200 may be adjusted according to the change of the measured air volume until the first wind wheel 100 reaches the first target rotation speed V1, and the second wind wheel 200 reaches the second target rotation speed V2.
In other embodiments, the air volume detector 500 may also be a wind pressure sensor, and the wind speed is calculated by wind pressure, and then the air volume is calculated by the wind speed and the sectional area of the airflow channel.
In an embodiment, the outdoor unit 10 further includes a first driving member 600 and a second driving member 700 connected to the controller, the first driving member 600 is connected to the first wind wheel 100 for driving the first wind wheel 100 to rotate, the second driving member 700 is connected to the second wind wheel 200 for driving the second wind wheel 200 to rotate, wherein the first driving member 600 and the second driving member 700 may be motors, and the first driving member 600 and the second driving member 700 respectively drive the first wind wheel 100 and the second wind wheel 200 to rotate in opposite directions.
In an embodiment, the first driving member 600 and the second driving member 700 may be motors. In other embodiments, the first driving member 600 and the second driving member 700 may also be cylinders, etc., and are not limited herein.
In an embodiment, the first wind wheel 110 and the second wind wheel 120 can also be driven by the same driving component, for example, two sleeved rotating shafts are provided, the output end of the driving component is directly connected to one of the rotating shafts, and is connected to the other rotating shaft through a gear, and the two rotating shafts are respectively connected to the first wind wheel 110 and the second wind wheel 120, so that the driving component can drive the first wind wheel 110 and the second wind wheel 120 simultaneously.
In an embodiment, the outdoor unit 10 further includes an amplitude detector 800 connected to the processor for detecting an amplitude of vibration of the outdoor unit 10, and the controller further changes the rotation speeds of the first wind wheel and the second wind wheel when the amplitude of vibration exceeds a preset amplitude of vibration, so that the amplitude of vibration detected by the amplitude detector 800 is less than or equal to the preset amplitude of vibration.
In one embodiment, the amplitude detector 800 may be a displacement sensor, and calculates the amplitude by detecting the magnitude of the displacement. In other embodiments, the amplitude detector 800 may also be a pressure sensor, and the amplitude is calculated by detecting the magnitude of the pressure, which is not limited herein.
In an embodiment, the outdoor unit 10 of the air conditioner may further include a casing 900, the first wind wheel 100, the second wind wheel 200, the heat exchanger 300, and the compressor 400 are all disposed in the casing 900, and an air outlet 910 is disposed on the casing 900, so that air flows generated by the first wind wheel 100 and the second wind wheel 200 can be discharged from the air outlet 910, and the casing 900 may protect and prevent dust for the first wind wheel 100, the second wind wheel 200, the heat exchanger 300, and the compressor 400.
In one embodiment, the housing 900 is substantially square in shape. In other embodiments, the outer shape of the housing 900 may be a cylindrical shape, and the like, without limitation.
In an embodiment, the amplitude detector 800 may be disposed on the heat exchanger 300. In other embodiments, the amplitude detector 800 may be disposed on the housing 900 or the compressor 400, which is not limited herein.
In an embodiment, the air volume detector 500 may be disposed at a portion of the heat exchanger 300 close to the first wind wheel 110, may be disposed at an outer side of the first wind wheel 110 or the second wind wheel 120, or may be disposed at a side of the second wind wheel 120 away from the first wind wheel 110.
In an embodiment, the number of the air volume detectors 500 may also be multiple, and the air volume detectors are respectively disposed at a portion of the heat exchanger 300 close to the first wind wheel 110, an outer side of the first wind wheel 110 or the second wind wheel 120, and a side of the second wind wheel 120 away from the first wind wheel 110, and an average value of air volumes detected by the air volume detectors 500 is calculated by the processor as a detection value, so that a detection result is more accurate.
Referring to fig. 3 and 4, in the embodiment of the outdoor unit of the air conditioner, the first wind wheel 100 and the second wind wheel 200 are combinedThe generated fan set generates less noise under the condition that the frequency and the generated air volume of the air conditioner outdoor unit of the single wind wheel fan are the same. For example, when the air volume of the fan group and the single wind wheel fan reaches 11000m3And when the noise is per hour, the noise of the fan set is below 60dB, and the noise of the single wind wheel fan is above 60 dB. For example, when the frequencies of the fan set and the single wind wheel fan are both 600Hz, the noise of the fan set is below 30dB, and the noise of the single wind wheel fan is above 30 dB.
Referring to fig. 5, an embodiment of a vibration reduction method of an outdoor unit of an air conditioner according to the present invention includes:
s101, acquiring any two of a first rotating frequency of the first wind wheel, a second rotating frequency of the second wind wheel and the working frequency of the compressor.
In an embodiment, the first wind wheel 110 and the second wind wheel 120 are axial flow wind wheels, and the airflow flowing through the heat exchanger is extracted from the air conditioner outdoor unit 10 by means of radial air inlet and axial air outlet to be sent to the outside.
In an embodiment, the outdoor unit 10 is in a top-outlet type, and in other embodiments, the outdoor unit may also be in a bottom-outlet type or a side-outlet type, which is not limited herein.
In one embodiment, the first rotor and the second rotor are driven by the first driving member and the second driving member, respectively, to rotate in opposite directions.
In other embodiments, the first wind turbine 100 and the second wind turbine 200 may be driven by the same driving member, which is not limited herein.
S102, judging whether any two of the first rotation frequency, the second rotation frequency and the working frequency meet the following conditions: the absolute value of the difference between one or two times of one of the two and one or two times of the other is greater than or equal to 3.
And S103, if the absolute value of the difference between one or two times of one and the other is not satisfied by any two of the first rotating frequency, the second rotating frequency and the working frequency is greater than or equal to 3, adjusting the rotating speeds of the first wind wheel and the second wind wheel so that the absolute value of the difference between one or two times of one and the other is greater than or equal to 3.
By enabling the absolute value of the difference value between one or two times of the first rotating frequency, the second rotating frequency and the working frequency and one or two times of the second rotating frequency and the working frequency to be larger than or equal to 3, the beat vibration or the resonance phenomenon generated between the compressor and any two of the first wind wheel and the second wind wheel can be reduced or eliminated, the noise of the air conditioner outdoor unit is reduced, the hidden danger of structural damage is reduced, and the reliability of the air conditioner outdoor unit is improved.
Referring to fig. 6, another embodiment of the vibration damping method of the outdoor unit of an air conditioner according to the present invention includes:
s201, obtaining a first initial rotating speed V10 of the first wind wheel, a second initial rotating speed V20 of the second wind wheel, and initial air quantity Q0 corresponding to the first initial rotating speed V10 and the second initial rotating speed V20.
In an embodiment, the first start rotation speed V10 and the second start rotation speed V20 may be obtained by obtaining rotation speeds of a first driving element driving the first wind wheel and a second driving element driving the second wind wheel, respectively, and the start air quantity Q0 may be obtained by the air quantity detector.
In other embodiments, the first start rotation speed V10, the second start rotation speed V20, and the start air volume Q0 may also be preset values.
S202, comparing the initial air quantity Q0 with the target air quantity Qt, and calculating the rotating speed Vt of the first wind wheel and the second wind wheel required to be changed according to the initial air quantity Q0 and the target air quantity Qt.
In an embodiment, the rotation speed Vt of the first wind wheel and the second wind wheel to be converted can be calculated according to the relationship between the rotation speed and the air volume of the first wind wheel and the second wind wheel, and the difference value between the initial air volume Q0 and the target air volume Qt (i.e. the air volume required to be increased or decreased).
S203, if Qt is more than or equal to Q0, Vt is more than or equal to 0, and the first starting rotating speed V10 and the second starting rotating speed V20 are respectively less than or equal to the first target rotating speed V1 and the second target rotating speed V2.
S204, if Qt is less than Q0, Vt is less than 0, and the first starting rotating speed V10 and the second starting rotating speed V20 are respectively greater than the first target rotating speed V1 and the second target rotating speed V2.
And S205, calculating a first target rotating speed V1 ═ V10+ Vt of the first wind wheel and a second target rotating speed V2 ═ V20+ Vt of the second wind wheel.
In an embodiment, the first starting rotation speed V10 may be greater than 0 and less than the first target rotation speed V1 of the first wind wheel, and the second starting rotation speed V20 may be greater than 0 and less than the second target rotation speed V2 of the second wind wheel, i.e., Vt > 0, so that the first wind wheel and the second wind wheel can rotate at a lower speed first, and the first wind wheel and the second wind wheel are prevented from directly rotating at a higher speed to cause an excessive vibration amplitude or a too strong resonance and beat phenomenon.
And S206, calculating a first rotation frequency F1 ═ V1 × (B) 1/60 and a second rotation frequency F2 ═ V2 × (B) 2/60, wherein the first target rotation speed is V1rpm, the second target rotation speed is V2rpm, B1 is the number of blades of the first wind wheel, and B2 is the number of blades of the second wind wheel.
In one embodiment, the number of blades of the first rotor and the number of blades of the second rotor may be singular, respectively, and further may be mutually prime.
S207, judging whether the first rotation frequency F1 and the second rotation frequency F2 meet | m × F1-n × F2| ≧ 3, wherein m and n are 1 or 2 respectively.
And S208, if the first rotation frequency F1 and the second rotation frequency F2 satisfy | m × F1-n × F2| ≧ 3, recording Qt, V1 and V2.
In an embodiment, if the first rotation frequency F1 and the second rotation frequency F2 satisfy | m × F1-n × F2| ≧ 3, the first wind wheel and the second wind wheel do not generate resonance or have a small influence of resonance, and when the outdoor unit of the air conditioner is started next time, the first wind wheel and the second wind wheel can directly operate at the speed of V1 and V2 respectively as the starting speed, and the speed adjustment is not required again.
S209, if the first rotation frequency F1 and the second rotation frequency F2 do not satisfy | m × F1-n × F2| ≧ 3, reducing the rotation speed of one of the first wind wheel and the second wind wheel so that | m × F1-n × F2| ≧ 3; and increasing the rotating speed of the other one of the first wind wheel and the second wind wheel so that the air volume flowing through the first wind wheel and the second wind wheel reaches the target air volume Qt.
In an embodiment, if the first rotation frequency F1 and the second rotation frequency F2 do not satisfy | m × F1-n × F2| ≧ 3, the resonance effect generated between the first wind wheel and the second wind wheel is large, the rotation frequency difference between the first wind wheel and the second wind wheel is changed by changing the rotation speed difference between the first wind wheel and the second wind wheel, so as to reduce or eliminate the resonance phenomenon, and the problem that the amplitude of the first wind wheel or the second wind wheel is too large or the resonance effect between the first wind wheel and the second wind wheel is too large due to the fact that the rotation speed of one of the first wind wheel and the second wind wheel is increased first by reducing the rotation speed of the other of the first wind wheel and the second wind wheel is too large can be avoided.
In other embodiments, the rotation speeds of the first wind rotor and the second wind rotor may be increased and decreased simultaneously, respectively, without limitation.
S210, recording Qt and the changed rotating speeds of the first wind wheel and the second wind wheel, so that when the air-conditioning outdoor unit is started next time, the first wind wheel and the second wind wheel can respectively and directly rotate at the recorded speeds as initial speeds without carrying out speed adjustment again.
Referring to fig. 7, in this embodiment, the method for damping vibration of an outdoor unit of an air conditioner may further include:
s301, detecting the vibration amplitude of the air conditioner outdoor unit.
In one embodiment, the vibration amplitude of the outdoor unit of the air conditioner may be detected by an amplitude detector.
In one embodiment, the amplitude detector may be a displacement sensor, and the amplitude is calculated by detecting the magnitude of the displacement. In other embodiments, the amplitude detector may also be a pressure sensor, and the amplitude is calculated by detecting the magnitude of the pressure, which is not limited herein.
In other embodiments, the vibration amplitude of the outdoor unit of the air conditioner may also be detected by an external device, such as an image detection device, a photoelectric sensing detection device, and the like.
S302, judging whether the vibration amplitude is larger than a preset vibration amplitude.
S303, if the vibration amplitude is smaller than or equal to the preset vibration amplitude, the first wind wheel and the second wind wheel keep the existing rotating speed.
S304, if the vibration amplitude is larger than the preset vibration amplitude, the rotating speed of one of the first wind wheel and the second wind wheel is reduced by Va, and the rotating speed of the other of the first wind wheel and the second wind wheel is increased by Vb, so that the vibration amplitude is smaller than or equal to the preset vibration amplitude, the noise of the air conditioner outdoor unit can be reduced, and the stability of the air conditioner outdoor unit is improved.
In one embodiment, Va and Vb have equal values so that the overall air volume remains unchanged or varies less. In other embodiments, Va and Vb may have different values, and are not limited herein.
Referring to fig. 8, another embodiment of the vibration damping method of the outdoor unit of an air conditioner according to the present invention includes:
s401, acquiring a first rotating frequency F1 of the first wind wheel, a second rotating frequency F2 of the second wind wheel and an operating frequency F3 of the compressor.
In one embodiment, the first rotor and the second rotor are driven by the first driving member and the second driving member, respectively, to rotate in opposite directions.
S402, calculating a shielding interval of a first target rotating speed of the first wind wheel and a second target rotating speed of the second wind wheel according to a relation | j F3-k F1| ≧ 3 or | j F3-k F2| ≧ 3 between the first rotating frequency F1, the second rotating frequency F2 and the working frequency F3, wherein j and k are respectively 1 or 2, the first target rotating speed is located in the shielding interval when | j F3-k F1| < 3, and the second target rotating speed is located in the shielding interval when | j F3-k F2| < 3.
And S403, calculating a first target rotating speed V1 and a second target rotating speed V2 according to the target air volume.
S404, judging whether the first target rotating speed or the second target rotating speed is in the shielding interval.
In an embodiment, a first rotational frequency F1 and a second rotational frequency F2 may be calculated according to a first target rotational speed V1rpm, a second target rotational speed V2rpm, a first rotor blade number B1, and a second rotor blade number B2, respectively, where F1 ═ V1 ═ B1/60, and F2 ═ V2 ═ B2/60.
S405, if the first target rotating speed or the second target rotating speed is within the shielding interval, reducing one of the first target rotating speed or the second target rotating speed to enable one of the first target rotating speed or the second target rotating speed to be located outside the shielding interval, increasing the other one of the first target rotating speed or the second target rotating speed to enable the other one of the first target rotating speed or the second target rotating speed to be located outside the shielding interval, and enabling the air volume corresponding to the adjusted first target rotating speed and the adjusted second target rotating speed to be the target air volume.
In an embodiment, if the first target rotation speed or the second target rotation speed is within the shielding interval, the beat vibration influence generated between the first wind wheel or the second wind wheel and the compressor is large, the rotation frequency difference between the first wind wheel and the second wind wheel is changed by changing the rotation speed difference between the first wind wheel and the second wind wheel, and then the beat vibration phenomenon is reduced or eliminated, and the problem that the amplitude of the first wind wheel or the second wind wheel is too large or the beat vibration influence between the first wind wheel, the second wind wheel and the compressor is too large due to the fact that the rotation speed of one of the first wind wheel and the second wind wheel is increased first by reducing the rotation speed of one of the first wind wheel and the second wind wheel first and then increasing the rotation speed of the other of the first wind wheel and the second wind wheel can be avoided.
In other embodiments, the rotation speeds of the first wind rotor and the second wind rotor may be increased and decreased simultaneously, respectively, without limitation.
S406, if the first target rotating speed and the second target rotating speed are not in the shielding interval, the first wind wheel and the second wind wheel keep the existing rotating speeds.
In an embodiment, if the first target rotation speed and the second target rotation speed are not within the shielding interval, the first wind wheel or the second wind wheel and the compressor do not generate beat vibration or have a small influence on beat vibration, and when the outdoor unit of the air conditioner is started next time, the first wind wheel and the second wind wheel can respectively and directly operate at the initial speed without performing speed adjustment again.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (11)
1. An outdoor unit of an air conditioner, comprising:
the first wind wheel and the second wind wheel are arranged at intervals along the axial direction;
the heat exchanger is arranged opposite to the first wind wheel and the second wind wheel;
the compressor is arranged in the heat exchanger;
wherein any two of the first rotational frequency of the first wind turbine, the second rotational frequency of the second wind turbine, and the operating frequency of the compressor satisfy: the absolute value of the difference between one or two times of one of the arbitrary two and one or two times of the other is greater than or equal to 3.
2. The outdoor unit of claim 1, further comprising an air volume detector and a controller for controlling the first wind wheel to be shifted from a first starting rotation speed V10 to a first target rotation speed V1, and the second wind wheel to be shifted from a second starting rotation speed V20 to a second target rotation speed V2, so that the air volume detected by the air volume detector reaches a target air volume Qt.
3. The outdoor unit of claim 2, further comprising a processor connected to the controller and the air volume detector, for calculating a rotation speed Vt to be changed by the first wind wheel and the second wind wheel, wherein V1 is V10+ Vt, and V2 is V20+ Vt.
4. The outdoor unit of claim 1, wherein the first rotation frequency F1, the second rotation frequency F2, and the operation frequency F3 satisfy the following relationships: and | j F3-k F1| ≧ 5 and | j F3-k F2| ≧ 5, j and k are 1 or 2 respectively.
5. The outdoor unit of claim 1, further comprising a controller, and a first driving member and a second driving member connected to the controller, wherein the first driving member is connected to the first wind wheel, and the second driving member is connected to the second wind wheel.
6. A vibration reduction method of an air conditioner outdoor unit is characterized by comprising the following steps:
acquiring any two of a first rotating frequency of a first wind wheel, a second rotating frequency of a second wind wheel and a working frequency of a compressor;
judging whether any two of the two satisfy the conditions: the absolute value of the difference between one or two times of one of the arbitrary two and one or two times of the other is greater than or equal to 3;
if the condition is not met, adjusting the rotating speed of the first wind wheel and/or the second wind wheel so as to meet the condition.
7. The method of claim 6, wherein the step of obtaining the first and second rotational frequencies comprises:
acquiring a first initial rotating speed V10 of the first wind wheel and a second initial rotating speed V20 of the second wind wheel;
calculating the rotating speed Vt of the first wind wheel and the second wind wheel to be converted;
calculating a first target rotating speed V1 ═ V10+ Vt of the first wind wheel and a second target rotating speed V2 ═ V20+ Vt of the second wind wheel;
and calculating the first rotation frequency F1 ═ V1 × (B) 1/60 and the second rotation frequency F2 ═ V2 × (B) 2/60, wherein B1 is the number of blades of the first wind wheel and B2 is the number of blades of the second wind wheel.
8. The method of claim 7, wherein Vt is ≧ 0 if Qt ≧ Q0, and Vt < 0 if Qt < Q0.
9. A method according to claim 6, characterised in that if the first and second rotational frequencies F1, F2 do not fulfil the condition, the method of adjusting the rotational speed of the first and/or second wind rotor to fulfil the condition comprises:
reducing the rotational speed of one of the first wind wheel and the second wind wheel such that | m x F1-n x F2| ≧ 3;
the rotation speed of the other one is increased so that the air volume reaches the target air volume Qt.
10. The method of claim 6, further comprising:
detecting the vibration amplitude of the air conditioner outdoor unit;
judging whether the vibration amplitude is larger than a preset vibration amplitude or not;
if so, reducing the rotating speed of one of the first wind wheel and the second wind wheel, and increasing the rotating speed of the other one of the first wind wheel and the second wind wheel so as to enable the vibration amplitude to be smaller than or equal to the preset vibration amplitude.
11. The method according to claim 6, characterized in that the method comprises in particular:
acquiring the first rotating frequency F1, the second rotating frequency F2 and the working frequency F3;
calculating a shielding interval of a first target rotating speed of the first wind wheel and a second target rotating speed of the second wind wheel according to the conditions;
calculating the first target rotating speed and the second target rotating speed;
judging whether the first target rotating speed or the second target rotating speed is in the shielding interval;
if the first target rotating speed or the second target rotating speed is within the shielding interval, reducing one of the first target rotating speed and the second target rotating speed, and increasing the other one of the first target rotating speed and the second target rotating speed so that the first target rotating speed and the second target rotating speed are both located outside the shielding interval, and the air volume corresponding to the adjusted first target rotating speed and the second target rotating speed is the target air volume.
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| CN202011079956.7A CN114322113A (en) | 2020-10-10 | 2020-10-10 | Air conditioner outdoor unit and vibration reduction method thereof |
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| CN202011079956.7A CN114322113A (en) | 2020-10-10 | 2020-10-10 | Air conditioner outdoor unit and vibration reduction method thereof |
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