CN102721120B - Method for controlling frequency inverter air conditioner outdoor fan and compressor vibration noise - Google Patents
Method for controlling frequency inverter air conditioner outdoor fan and compressor vibration noise Download PDFInfo
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Abstract
The invention relates to a method for controlling frequency inverter air conditioner outdoor fan and compressor vibration noise. The rotation speed of a wind wheel (1) of an air conditioner outdoor fan is Y r/min. The number of the blade of the wind wheel (1) is Z. The rotation fundamental frequency of the blade of the wind wheel (1) is F1:F1=Z*Y/60 Hz. The rotation frequency of a compressor (2) is X Hz. The method is characterized in that when the operation frequency of the compressor (2) X is between 65 Hz and 150 Hz, the rotation speed of the wind wheel (1) is in the range of 800 r/min to 950 r/min, and the following relationships exist: the absolute value of the difference between the rotation frequency of the compressor X and double rotation fundamental frequency of the blade of the wind wheel (1) is greater than 5 Hz, namely |X-2*F1|>5 Hz. The method provided by the invention can greatly weaken or completely eliminate the vibration formed by the superimposition of the wind wheel and the compressor rotation noise, thereby the sound quality the noise of the air conditioner outdoor unit is significantly improved, the sheet metal structure resonance can be effectively avoided, the vibration can be reduced, the sound quality can be improved, the noise can be reduced, and the reliability of the whole machine can be improved.
Description
Technical field
The present invention a kind ofly controls the method that the noise that shakes clapped by frequency inverter air conditioner outdoor fan and compressor, belongs to and controls the renovation technique that the method for the noise that shakes clapped by frequency inverter air conditioner outdoor fan and compressor.
Background technology
Day by day harsh energy environment issues, force each air-conditioning producer all in the running frequency improving compressor of air conditioner, exploitation convertible frequency air-conditioner product, to seek the cooling and warming ability promoting air-conditioner on little compressor body, improve the Energy Efficiency Ratio of air-conditioning, accelerate cooling or heating effect.Such as, the frequency of compressor of air conditioner is brought up to more than 65HZ, adopt 80HZ, 90HZ, even more than 100HZ.Along with the raising of frequency of air condition compressor, the Rotation Noise amplitude of compressor is also increasing, when the Rotation Noise amplitude of compressor increases, simultaneously also with outdoor fan blade rotary fundamental frequency (BPF, Blade Passing-by Frequency) 2 times close to time, the Rotation Noise of compressor superposes with the Rotation Noise of wind wheel, to shake phenomenon with regard to creating serious bat, obvious low frequency pulsating different sound is produced when causing outdoor machine system to run, the shake intrinsic frequency of the frequency of different sound and human organ of this bat is suitable, people is easily allowed to feel irritated and uneasy, tonequality and the comfort of air-conditioner outdoor unit are had a strong impact on, simultaneously also because the speed of compressor is suitable with 2 times of blade fundamental frequencies of wind wheel, the resonance of sheet metal structural is easily caused in running, have a strong impact on the reliability of air-conditioning system.
Summary of the invention
The object of the invention is to consider the problems referred to above and provide a kind of and control the method that the noise that shakes clapped by frequency inverter air conditioner outdoor fan and compressor.The present invention not only saves that space, cost are low, use safety, easy to operate, long service life.
Technical scheme of the present invention is: the method for the noise that shakes clapped by control frequency inverter air conditioner outdoor fan of the present invention and compressor, the rotating speed of the wind wheel of described outdoor fan of air-conditioner is Y rev/min, the number of blade of wind wheel is Z, the blade rotary fundamental frequency of wind wheel is F1:F1=Z × Y/60 hertz, the speed of described compressor is X hertz, when the running frequency X of compressor is between 65 hertz to 150 hertz, wind speed round Y is in the scope of 800 revs/min to 950 revs/min, and having following relation: the absolute value of the difference of two times of the speed X of compressor and the blade rotary fundamental frequency F1 of wind wheel is greater than 5 hertz, namely | X-2 × F1|>5 hertz.
The number of blade of above-mentioned wind wheel is 2 to 4 leaves.
Above-mentioned wind wheel is axial-flow windwheel or oblique flow wind wheel.
The present invention's advantage is compared with prior art: when the running frequency of compressor is higher than 65 hertz, the speed of compressor and two of wind wheel times of blade fundamental frequencies stagger more than 5 hertz, substantially increase wind wheel and compressor rotational noise mutually superpose form the frequency of clapping and shaking, make the time interval between two bats close to the minimum time resolution ratio of people's ear, the different sound thus imperceptible bat is shaken, can significantly slacken or thoroughly eliminate wind wheel and compressor Rotation Noise superposition and formed bat shake, thus significantly improve the tonequality of air-conditioner outdoor unit noise, tonequality when particularly compressor high frequency runs, eliminate bat to shake buzz, also can effectively avoid sheet metal structural to resonate simultaneously, reach vibration damping and improve tonequality, reduce noise and improve the object of whole aircraft reliability.The present invention is a kind of method that the noise that shakes clapped by convenient and practical control frequency inverter air conditioner outdoor fan and compressor.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment in the present invention;
Fig. 2 is two blade wind-wheel rotating speeds of this patent protection and the frequency dependence figure of compressor.
Fig. 3 is three blade wind-wheel rotating speeds of this patent protection and the frequency dependence figure of compressor.
Fig. 4 is four blade wind-wheel rotating speeds of this patent protection and the frequency dependence figure of compressor.
Fig. 5 is that compressor speed deducts the absolute value of the difference of wind wheel 2 times of blade fundamental frequencies and the graph of relation clapping the cycle of shaking.
Fig. 6 is compressor speed when being 80 hertz, and the bat when absolute value of the difference of compressor speed and wind wheel 2 times of blade fundamental frequencies is 1 hertz is shaken the frequency noise figure of acoustic pressure and time relationship.
Fig. 7 is compressor speed when being 80 hertz, and the bat when absolute value of the difference of compressor speed and wind wheel 2 times of blade fundamental frequencies is 5 hertz is shaken the frequency noise figure of acoustic pressure and time relationship.
Fig. 8 is compressor speed when being 80 hertz, and the bat when absolute value of the difference of compressor speed and wind wheel 2 times of blade fundamental frequencies is 10 hertz is shaken the frequency noise figure of acoustic pressure and time relationship.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described further.
Embodiment one
As shown in figure, technical scheme of the present invention is: a kind ofly control the method that the noise that shakes clapped by frequency inverter air conditioner outdoor fan and compressor, the rotating speed of the wind wheel 1 of described outdoor fan of air-conditioner is Y rev/min, the number of blade of wind wheel 1 is Z, blade rotary fundamental frequency (the BPF of wind wheel 1, Blade Passing-by Frenquency) be F1:F1=Z × Y/60 hertz, the speed of described compressor 2 is X hertz, the rotating speed of wind wheel 1 is in the scope of 800 revs/min to 950 revs/min, when the running frequency X of compressor is within the scope of 65 to 150 hertz, there is following relation: | X-2 × F1|>5 hertz.That is: when the speed X of compressor is positioned at 65 to 150 hertz of scopes, the absolute value of the difference of speed X and two times of wind wheel blade fundamental frequency F1 of compressor is greater than 5 hertz.
Above-mentioned wind wheel 1 is axial flow or oblique flow wind wheel, and the number of blade of wind wheel 1 is 2 to 4 leaves.
When controlling the rotating speed of wind wheel 1 in the scope of 800 revs/min to 950 revs/min, effectively can ensure the air quantity of off-premises station and the cooling or heating effect of air-conditioner, also can ensure when air-conditioner wind turbin generator adopts 6 pole motor simultaneously, wind wheel has higher efficiency, while guarantee cooling and warming, also effectively reduce the power of motor of wind wheel.
For the wind wheel 1 that the number of blade is 2 leaves, when the speed of compressor 2 is at 65 hertz to 150 hertz, the running speed choosing wind wheel is 890 revs/min, now, 2 times of wind wheel blade fundamental frequencies are 59.3 hertz, and it differs 5.7 to 90.7 hertz with the speed of compressor, effectively can ensure the high efficiency of outdoor fan motor, ensure outdoor air quantity, also effectively eliminate bat simultaneously and to shake different sound.
For the wind wheel 1 that the number of blade is 3 leaves, when the speed of compressor 2 is at 65 hertz to 86 hertz, the running speed choosing wind wheel is 910 revs/min, now, 2 times of wind wheel blade fundamental frequencies are 91 hertz, and the rotary frequency rate variance of the compressor in itself and 65 ~ 86 hertz of ranges of speeds is 5 to 26 hertz; When the running frequency of compressor is 86 hertz to 150 hertz, the running speed choosing wind wheel is 810 revs/min, now, 2 times of wind wheel blade fundamental frequencies are 81 hertz, it differs 5 to 69 hertz with the speed of the compressor in 86 ~ 150 hertz of ranges of speeds, effectively can ensure the high efficiency of outdoor fan motor, ensure outdoor air quantity, also effectively eliminate bat simultaneously and to shake different sound.
For the wind wheel 1 that the number of blade is 4 leaves, when the speed of compressor 2 is at 65 hertz to 112 hertz, the running speed choosing wind wheel is 894 revs/min, now, 2 times of wind wheel blade fundamental frequencies are 119.2 hertz, and the rotary frequency rate variance of the compressor in itself and 65 ~ 112 hertz of ranges of speeds is 7.2 to 54.2 hertz; When the running frequency of compressor is 112 hertz to 150 hertz, the running speed choosing wind wheel 1 is 800 revs/min, now, 2 times of wind wheel blade fundamental frequencies are 106.7 hertz, it differs 5.3 to 43.3 hertz with the speed of the compressor in 112 ~ 150 hertz of ranges of speeds, effectively can ensure the high efficiency of outdoor fan motor, ensure outdoor air quantity, also effectively can eliminate bat and to shake different sound.
When compressor 2 running frequency is 65 to 150 hertz, by different wind wheel blade shapes, blade height design, and by changing the different rotating speed gear of motor or passing through the modes such as control circuit feedback regulation wind speed round, both ensured that the rotating speed of wind wheel was in the scope of 800 to 950 revs/min, ensured again that the rotary frequency rate variance of 2 times of wind wheel blade fundamental frequencies and compressor was more than 5 hertz.
As shown in Figures 2 to 4; when to be respectively the number of blade be 2 leaves, 3 leaves, 4 leaf; when the working speed of compressor 2 is 65 hertz to 150 hertz, the working speed of wind wheel 1 is 800 revs/min to 950 revs/min, meets the protection domain graph of a relation of the correspondence of condition of the present invention.
If the running frequency of compressor 2 is X hertz, the rotating speed of wind wheel 1 is Y rev/min, as Fig. 2, is the wind wheel of 2 leaves, has following relation: X-4Y/60>5 for the number of blade; 65≤X≤150,800≤Y≤950. are reduced to: Y<15X-75,65≤X≤150,800≤Y≤950.In figure, X is compressor operating frequency, and unit is: hertz; Y is wind speed round, and unit is: rev/min.Hatched area in figure is the protection domain meeting condition of the present invention.The coordinate (65,800) of each characteristic point identified in figure, (65,900), (68,950), (150,950), the hatched area that (150,800) are formed is the protection domain of patent of the present invention.Represent that wind wheel blade number is 2 leaves, the running frequency of compressor is at 65 hertz to 150 hertz, the rotating speed of wind wheel is at 800 ~ 950 revs/min, and the rotary frequency rate variance more than 5 hertz of 2 of wind wheel times of blade fundamental frequencies and compressor, can effectively control or the bat eliminated between wind wheel and compressor is shaken different sound.
As Fig. 3, for the wind wheel that the number of blade is 3 leaves, there is following relation: X-6Y/60>5 or 6Y/60-X<5,65≤X≤150,800≤Y≤950. are reduced to: Y<10X-50 or Y>10X+50,65≤X≤150,800≤Y≤950.In figure, X is compressor operating frequency, and unit is: hertz; Y is wind speed round, and unit is: rev/min.Hatched area in figure is the protection domain meeting condition of the present invention.The coordinate (65,800) of each characteristic point identified in figure, (65; 950), (90,950); the hatched area that (75,800) are formed and coordinate points (85,800); (100; 950), (150,950); the hatched area that (150,800) are formed is the protection domain of patent of the present invention.Represent that wind wheel blade number is 3 leaves, the running frequency of compressor is at 65 hertz to 150 hertz, the rotating speed of wind wheel is at 800 ~ 950 revs/min, and the rotary frequency rate variance more than 5 hertz of 2 of wind wheel times of blade fundamental frequencies and compressor, can effectively control or the bat eliminated between wind wheel and compressor is shaken different sound.
As Fig. 4, for the wind wheel 1 that the number of blade is 4 leaves, there is following relation: X-8Y/60>5 or 8Y/60-X<5, and 65≤X≤150,800≤Y≤950. are reduced to: Y<7.5X-37.5 or Y>7.5X+37.5,65≤X≤150,800≤Y≤950.In figure, X is compressor 2 running frequency, and unit is: hertz; Y is wind speed round, and unit is: rev/min.Hatched area in figure is the protection domain meeting condition of the present invention.The coordinate (65,800) of each characteristic point identified in figure, (65; 950), (122,950); the hatched area that (102,800) are formed and coordinate points (112,800); (132; 950), (65,950); the hatched area that (150,800) are formed is the protection domain of patent of the present invention.Represent that wind wheel blade number is 3 leaves, the running frequency of compressor is at 65 hertz to 150 hertz, the rotating speed of wind wheel is at 800 ~ 950 revs/min, and the rotary frequency rate variance more than 5 hertz of 2 of wind wheel times of blade fundamental frequencies and compressor, can effectively control or the bat eliminated between wind wheel and compressor is shaken different sound.
When the running frequency of compressor is lower than 65 hertz, the Rotation Noise value of compressor is lower, noise energy is little, even if now the speed of compressor is identical with 2 times of wind wheel blade fundamental frequencies, bat occurs to shake phenomenon, it is very low that it claps the energy that shakes, and people's ear is almost imperceptible, can not produce and make us feeling irritated buzz, also can not have an impact to the reliability of outdoor machine system.Therefore, when compressor operating frequency is lower than 65 hertz, can not consider that the bat of wind wheel blade fundamental frequency and compressor operating frequency is shaken problem.
Fig. 5 is that compressor speed deducts the absolute value of the difference of wind wheel 2 times of blade fundamental frequencies and the graph of relation clapping the cycle of shaking.As seen from the figure, when both difference on the frequencies are greater than 5 hertz, their bat cycle of shaking is very little, and now, people's ear substantially be can't hear bat and to be shaken different sound.The speed of clapping shake cycle and compressor has nothing to do, only relevant to the extent of compressor speed and wind wheel 2 times of blade fundamental frequencies.
Fig. 6 is compressor speed when being 80 hertz, the bat when absolute value of the difference of compressor speed and wind wheel 2 times of blade fundamental frequencies is 1 hertz is shaken the frequency noise figure of acoustic pressure and time relationship, as seen from the figure, when both speeds differ 1 hertz, bat is shaken clearly, and now can obviously see and hear the waist and abdomen clapping and shake, clapping the cycle of shaking is 1 second, bat shakes different sound very greatly, has significantly uneasy and agitation to feel after people hears.Both differ 1 hertz not at the protection domain of this patent at speed.
Fig. 7 is compressor speed when being 80 hertz, and the bat when absolute value of the difference of compressor speed and wind wheel 2 times of blade fundamental frequencies is 5 hertz is shaken the frequency noise figure of acoustic pressure and time relationship.Known by figure; during both frequency phase-differences 5 hertz; the waist that bat is shaken and abdomen weaken; the bat cycle of shaking significantly shortens; the bat different sound that shakes is eliminated substantially, and the impression of people's ear to be shaken different sound less than bat, when wind wheel blade number is 2 to 4 leaves; and wind speed round within the scope of 800 revs/min to 950 revs/min time, belong to the protection domain of this patent.
Fig. 8 is compressor speed when being 80 hertz, and the bat when absolute value of the difference of compressor speed and wind wheel 2 times of blade fundamental frequencies is 10 hertz is shaken the frequency noise figure of acoustic pressure and time relationship.Known by figure, during both frequency phase-differences 10 hertz, clap the waist that shakes and abdomen weakens, clap the cycle of shaking and significantly shorten, clap the different sound that shakes and substantially eliminate, the impression of people's ear to be shaken different sound less than bat, and level of noise also reduces more than 2 decibels simultaneously.When wind wheel blade number is 2 to 4 leaves, and wind speed round within the scope of 800 revs/min to 950 revs/min time, belong to the protection domain of this patent.
When the speed of compressor is 65 hertz to 150 hertz, wind speed round controls in the scope of 800 revs/min to 950 revs/min, wind wheel blade number adopts 2 leaf to 4 leaves, and the absolute value of the difference of the speed of compressor and wind wheel 2 times of blade fundamental frequencies is greater than 5 hertz, both can obviously stagger the two Rotation Noise, thus significantly reduce two rotational noises and mutually superpose formed bat and shake the cycle, make the time interval between two bats close to the minimum time resolution ratio of people's ear, achieve tonequality optimization, reduce the object of noise, noise figure reduces about 3dB.Also effectively ensure that heat radiation air quantity and the electric efficiency of air-conditioner outdoor unit simultaneously, improve complete machine efficiency, reduce complete machine cost, thus improve the comprehensive cost performance of complete machine.
When speed and the wind wheel 2 times of compressor rotates the frequency that fundamental frequency differs identical, under the speed that compressor is different, itself and the bat of wind wheel cycle of shaking is identical, only claps acoustic pressure difference of shaking.When the speed of compressor is lower than 65 hertz, its acoustic pressure is very little, and clap the energy that shakes very low, people's ear is almost imperceptible.So, when the speed of compressor is lower than 65 hertz, can consider that compressor and wind wheel clap the impact of shaking mutually.
The present invention is not only limited to above-mentioned example, and the change made in essential scope of the present invention, remodeling, increase or replacement, also belong to protection scope of the present invention.
Claims (3)
1. one kind controls the method that the noise that shakes clapped by frequency inverter air conditioner outdoor fan and compressor, the rotating speed of the wind wheel (1) of described outdoor fan of air-conditioner is Y rev/min, the number of blade of wind wheel (1) is Z, the blade rotary fundamental frequency of wind wheel (1) is F1:F1=Z × Y/60 hertz, the speed of described compressor (2) is X hertz, it is characterized in that when the running frequency X of compressor (2) is between 65 hertz to 150 hertz, wind wheel (1) rotating speed Y is in the scope of 800 revs/min to 950 revs/min, and having following relation: the absolute value of the difference of two times of the blade rotary fundamental frequency F1 of the speed X of compressor and wind wheel (1) is greater than 5 hertz, namely | X-2 × F1|>5 hertz.
2. the method for the noise that shakes clapped by control frequency inverter air conditioner outdoor fan according to claim 1 and compressor, it is characterized in that the number of blade of above-mentioned wind wheel (1) is 2 to 4 leaves.
3. the method for the noise that shakes clapped by control frequency inverter air conditioner outdoor fan according to claim 1 and compressor, it is characterized in that above-mentioned wind wheel (1) is for axial-flow windwheel or oblique flow wind wheel.
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| CN114322113A (en) * | 2020-10-10 | 2022-04-12 | 广东美的暖通设备有限公司 | Air conditioner outdoor unit and vibration reduction method thereof |
| CN112682935A (en) * | 2020-12-07 | 2021-04-20 | 珠海格力电器股份有限公司 | Control method, system, medium, equipment, terminal and application of outdoor unit of air conditioner |
| CN112556124B (en) * | 2020-12-15 | 2022-04-15 | 佛山市顺德区美的电子科技有限公司 | Method and device for reducing beat frequency noise of outdoor unit of variable frequency air conditioner and variable frequency air conditioner |
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