CN101403390A - Parallel axial fan system - Google Patents
Parallel axial fan system Download PDFInfo
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- CN101403390A CN101403390A CNA200810198702XA CN200810198702A CN101403390A CN 101403390 A CN101403390 A CN 101403390A CN A200810198702X A CNA200810198702X A CN A200810198702XA CN 200810198702 A CN200810198702 A CN 200810198702A CN 101403390 A CN101403390 A CN 101403390A
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- axial flow
- flow windwheel
- fan system
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Abstract
The invention discloses a parallel axial flow fan system which can be applied to air-conditioning equipment and ventilation equipment; the fan system comprises a first axial flow fan (1) and a second axial flow fan (3), wherein, the number of the blades of the first axial flow fan (1) is different from that of the blades of the second axial flow fan (3). As the two axial flow fans use the structures with different number of the blades which causes the rotating speed to be different, the rotating frequency of the two axial flow fans can be obviously staggered, the frequency of beat vibration which is formed by the mutual superposition of two rotating noises is greatly enhanced, thereby causing the time interval of two beats to get close to the smallest time resolving power of human ear. When being used in the outdoor unit of an air conditioner, the fan system can greatly improve the operating sound quality of the parallel axial flow fan system of the outdoor unit of the air conditioner. In addition, due to the number difference and the shape difference of the blades of the two axial flow fans, the natural frequency of the two axial flow fans can be staggered, thereby avoiding resonance in the operating process and achieving the purpose of lowering vibration. The fan system has the advantages of ingenious design, excellent performance, good convenience and practicality.
Description
Technical field
The present invention is a kind of parallel axial fan system that can be applicable to the apparatus of air conditioning and ventilation equipment, belongs to the renovation technique of parallel axial fan system.
Background technique
At present, be applied to the parallel axial fan system of the apparatus of air conditioning and ventilation equipment, parallel axial fan system as air conditioner outdoor machine adopts the same number of structure of two wind wheel blades mostly, owing to reasons such as voltage functuation, motor characteristic differences, the rotating speed of two blower fans can not be in full accord, and the speed that will cause two wind wheels like this is deviation slightly.The rotational noise mutual superposition of different frequency will form to clap and shake, and promptly blower fan system will produce obvious periodic low frequency pulsating noise in running, has had a strong impact on the tonequality and the comfort of air-conditioning.In addition,,, in running, also might cause resonance, not only further strengthen noise, but also can have influence on the operational safety of blower fan system if the blower fan dynamic balancing is relatively poor or vibration reducing measure is unreasonable because two wind wheel natural frequencys are close.
Summary of the invention
The objective of the invention is to consider the problems referred to above and a kind of periodicity low frequency pulsating noise that can effectively reduce when operation is provided, reach the parallel axial fan system of optimizing tonequality, vibration and noise reducing purpose.The present invention is reasonable in design, and is beneficial to mass production in batches.
Technological scheme of the present invention is: include first axial-flow windwheel, second axial-flow windwheel, wherein the lobe numbers of first axial-flow windwheel is different with the lobe numbers of second axial-flow windwheel.
The lobe numbers of above-mentioned first axial-flow windwheel is an odd number, and the lobe numbers of second axial-flow windwheel is an even number.
The lobe numbers of the lobe numbers of above-mentioned first axial-flow windwheel and second axial-flow windwheel is odd number, and the lobe numbers of first axial-flow windwheel is n, and the lobe numbers of second axial-flow windwheel is n+2m, m=1,2,3.......
The lobe numbers of the lobe numbers of above-mentioned first axial-flow windwheel and second axial-flow windwheel is even number, and the lobe numbers of first axial-flow windwheel is n1, and the lobe numbers of second axial-flow windwheel is n1+2m, m=1,2,3.......
All be equiped with air-ducting ring on above-mentioned first axial-flow windwheel and second axial-flow windwheel.
One side of above-mentioned first axial-flow windwheel and second axial-flow windwheel all is equiped with baffle plate.
Two axial flow wind wheel of the present invention is owing to adopt the different structure of lobe numbers, because of the lobe numbers difference, the rotating speed difference, so speed of the two axial flow wind wheel that can obviously stagger, improve two rotational noise mutual superposition greatly and form the frequency that bat is shaken, made for two time lags between clapping near the minimum time resolution of people's ear, when the present invention is used for air conditioner outdoor machine, can improve the operation tonequality of air conditioner outdoor machine parallel axial fan system greatly.In addition, the lobe numbers difference of two axial flow wind wheel, the shape difference, the natural frequency of the two that can stagger, thus avoid resonating in the running, reach and fall the purpose of shaking.The present invention is that a kind of design is ingenious, function admirable, convenient and practical parallel axial fan system.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is used for the plan view of air conditioner outdoor machine for the present invention;
Fig. 3 is the partial sectional view of Fig. 2.
Embodiment
Embodiment:
Structural representation of the present invention includes first axial-flow windwheel 1, second axial-flow windwheel 3 as shown in Figure 1, and wherein the lobe numbers of first axial-flow windwheel 1 is different with the lobe numbers of second axial-flow windwheel 3.
The lobe numbers of above-mentioned first axial-flow windwheel 1 is an odd number, and the lobe numbers of second axial-flow windwheel 3 is an even number.
The lobe numbers of the lobe numbers of above-mentioned first axial-flow windwheel 1 and second axial-flow windwheel 3 is odd number, and the lobe numbers of first axial-flow windwheel 1 is n, and the lobe numbers of second axial-flow windwheel 3 is n+2m, m=1,2,3.......
The lobe numbers of the lobe numbers of above-mentioned first axial-flow windwheel 1 and second axial-flow windwheel 3 is even number, and the lobe numbers of first axial-flow windwheel 1 is n1, and the lobe numbers of second axial-flow windwheel 3 is n1+2m, m=1,2,3.......
In the present embodiment, all be equiped with air-ducting ring 2 on above-mentioned first axial-flow windwheel 1 and second axial-flow windwheel 3.One side of above-mentioned first axial-flow windwheel 1 and second axial-flow windwheel 3 all is equiped with baffle plate 4.
Fig. 3 is used for the parallel axial fan system of top air-out air conditioner outdoor machine for the present invention, wherein first axial-flow windwheel 1 is three blade axial-flow wind wheels, second axial-flow windwheel 3 is the quaterfoil axial-flow windwheel, it is separately fixed on separately the asynchronous motor 6, and and air-ducting ring, with the incorporate top cover 19 of air outlet grate, and by last condenser 11, following condenser 13, front panel (not drawing in the drawings), dunnage 16, left side cover plate 5, right side cover plate 10, rear side cover plate 9, the return airway that cover plate 21 grades in front side are constituted has been formed a complete parallel axial fan system jointly.Other mainly plays a part to support and be connected whole air conditioner frame such as electric machine support 7, electric machine support dunnage parts 8, electric machine support supporting component 15, dunnage 16, barge board assembly 17.Last condenser 11, following condenser 13 are connected with supplying tube assembly 12, output tube assembly 14 respectively, and in addition, the top air-out air conditioner outdoor machine also is provided with left side cover plate 5, top cover 19, front side cover plate 21.
In system's running, ambient air process condenser 11,13 up and down enters, and after heat exchange, is discharged by the major diameter parallel axial fan that runs up.Owing to adopted the blower fan of the different numbers of blade, the two speed can obviously stagger, shake the cycle thereby dwindled the formed bat of two rotational noise mutual superposition greatly, made for two time lags between clapping near the minimum time resolution of people's ear, with the purpose that realizes that tonequality is optimized.In addition, because the natural frequency difference of two wind wheels, complete machine oscillation also obviously reduces, and noise figure has reduced about 2dB.
The present invention is not only limited to above-mentioned example, and in essential scope of the present invention, the variation of making, remodeling, increase or replacement also belong to protection scope of the present invention.
Claims (6)
1, a kind of parallel axial fan system includes first axial-flow windwheel (1), second axial-flow windwheel (3), it is characterized in that the lobe numbers of first axial-flow windwheel (1) is different with the lobe numbers of second axial-flow windwheel (3).
2, parallel axial fan system according to claim 1, the lobe numbers that it is characterized in that above-mentioned first axial-flow windwheel (1) is an odd number, the lobe numbers of second axial-flow windwheel (3) is an even number.
3, parallel axial fan system according to claim 1, it is characterized in that the lobe numbers of above-mentioned first axial-flow windwheel (1) and the lobe numbers of second axial-flow windwheel (3) are odd number, the lobe numbers of first axial-flow windwheel (1) is n, the lobe numbers of second axial-flow windwheel (3) is n+2m, m=1,2,3.......
4, parallel axial fan system according to claim 1, it is characterized in that the lobe numbers of above-mentioned first axial-flow windwheel (1) and the lobe numbers of second axial-flow windwheel (3) are even number, the lobe numbers of first axial-flow windwheel (1) is n1, the lobe numbers of second axial-flow windwheel (3) is n1+2m, m=1,2,3.......
5,, it is characterized in that all being equiped with air-ducting ring (2) on above-mentioned first axial-flow windwheel (1) and second axial-flow windwheel (3) according to each described parallel axial fan system of claim 1 to 4.
6, parallel axial fan system according to claim 4 is characterized in that a side of above-mentioned first axial-flow windwheel (1) and second axial-flow windwheel (3) all is equiped with baffle plate (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810198702XA CN101403390A (en) | 2008-09-23 | 2008-09-23 | Parallel axial fan system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810198702XA CN101403390A (en) | 2008-09-23 | 2008-09-23 | Parallel axial fan system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101403390A true CN101403390A (en) | 2009-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200810198702XA Pending CN101403390A (en) | 2008-09-23 | 2008-09-23 | Parallel axial fan system |
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| CN (1) | CN101403390A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101644274B (en) * | 2009-08-26 | 2011-01-05 | 广东美的电器股份有限公司 | Double axial-flow wind wheel system |
| CN101619729B (en) * | 2009-06-17 | 2012-07-18 | 广东美的电器股份有限公司 | Control method and operation method for optimizing beaten sound of parallel propeller fan systems |
| CN104863879A (en) * | 2015-04-30 | 2015-08-26 | 广东美的暖通设备有限公司 | Air conditioner system and axial wind wheel system of same |
| CN107850089A (en) * | 2015-09-16 | 2018-03-27 | 三菱重工制冷空调系统株式会社 | Pressure fan |
| CN109838397A (en) * | 2017-11-24 | 2019-06-04 | 李晓毅 | A kind of sound insulation wall type axial-flow fan |
| WO2021186618A1 (en) * | 2020-03-18 | 2021-09-23 | 三菱電機株式会社 | Blower |
-
2008
- 2008-09-23 CN CNA200810198702XA patent/CN101403390A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101619729B (en) * | 2009-06-17 | 2012-07-18 | 广东美的电器股份有限公司 | Control method and operation method for optimizing beaten sound of parallel propeller fan systems |
| CN101644274B (en) * | 2009-08-26 | 2011-01-05 | 广东美的电器股份有限公司 | Double axial-flow wind wheel system |
| CN104863879A (en) * | 2015-04-30 | 2015-08-26 | 广东美的暖通设备有限公司 | Air conditioner system and axial wind wheel system of same |
| CN107850089A (en) * | 2015-09-16 | 2018-03-27 | 三菱重工制冷空调系统株式会社 | Pressure fan |
| CN109838397A (en) * | 2017-11-24 | 2019-06-04 | 李晓毅 | A kind of sound insulation wall type axial-flow fan |
| WO2021186618A1 (en) * | 2020-03-18 | 2021-09-23 | 三菱電機株式会社 | Blower |
| JPWO2021186618A1 (en) * | 2020-03-18 | 2021-09-23 |
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| PB01 | Publication | ||
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Open date: 20090408 |