CN103115020A - Centrifugal fan provided with flow guide structure - Google Patents
Centrifugal fan provided with flow guide structure Download PDFInfo
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- CN103115020A CN103115020A CN2013100515569A CN201310051556A CN103115020A CN 103115020 A CN103115020 A CN 103115020A CN 2013100515569 A CN2013100515569 A CN 2013100515569A CN 201310051556 A CN201310051556 A CN 201310051556A CN 103115020 A CN103115020 A CN 103115020A
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- flow guide
- guide structure
- centrifugal cutter
- fan blade
- noise
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Abstract
The invention discloses a centrifugal fan provided with a flow guide structure. The centrifugal fan provided with the flow guide structure comprises fan vanes, the flow guide structure is arranged on the back surface of one or more fan vanes, and the flow guide structure is used for changing parameters of a boundary layer of each fan vane, putting off the separation of the boundary layer, preventing air flow from generating eddy and falling off at the tail edge position of each fan vane, and lowering the noise of the centrifugal fan.
Description
Technical field
The present invention relates to field of air conditioning, more specifically, relate to a kind of centrifugal cutter that flow guide structure is applied to machine in embedded type air conditioner, effectively reduce the noise that centrifugal cutter produces in the running.
Background technique
Along with constantly popularizing of air conditioner, the noise of air conditioner more and more is subject to user's attention, and particularly because the user is more obvious than other performances to the subjective sensation of air-conditioning noise, so the user is higher than other performances to the noise requirements of air-conditioning.The size of this external noise directly affect the overall performance of air-conditioning, and then affects the competitiveness of product in market, so the noise problem of solution air conditioner is the Focal point and difficult point of domestic and international each large air conditioner producer technical research always.
The reason of air-conditioning internal machine centrifugal cutter generation in the running noise can roughly be summarized as: 1. blade turns round the noise that produces; 2. the noise that produces when blade produces eddy current; 3. sinuous flow and the noise that produces; 4. produce with shell the noise that resonance occurs; 5. the noise that causes beyond blower fan.
Produce in the reason of noise at the above centrifugal cutter, wherein the noise of eddy current generation has a significant impact the running noise of centrifugal cutter.The centrifugal cutter that uses due to machine in present embedded type air conditioner in the running, the back side of its fan blade can produce eddy current, this eddy current not only can reduce the efficient of blower fan, and can produce noise.
For the generation reason of above noise, are all these reduction noises of mode that adopt the blade shape that changes centrifugal cutter in prior art.Although reduced to a certain extent the noise of fan, this method can reduce the air quantity of fan.
Based on foregoing description, need badly and want a kind of prerequisite not reducing air quantity of fan, effectively reduce the method for the noise of centrifugal cutter by the shape that changes centrifugal cutter.
Summary of the invention
For the noise that solves the eddy current generation causes the centrifugal cutter large problem of noise in the running, the object of the present invention is to provide a kind of centrifugal cutter with flow guide structure, effectively reduce the noise of centrifugal cutter from the source with the centrifugal cutter of flow guide structure under the prerequisite that does not reduce air quantity of fan.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of centrifugal cutter with flow guide structure comprises fan blade, is provided with to change the flow guide structure of blade boundary layer parameter at the one or more fan blade back side.
As preferably, described flow guide structure is arranged on the inner edge place, the back side of fan blade, is a series of from progressively be transitioned into the stepped corrugations shape projection on blade face near the leaf margin part.
As preferably, the back side of all fan blade is provided with flow guide structure.
As preferably, the length of described flow guide structure be the place fan blade length 1/2.
As preferably, described flow guide structure is discontinuity.
As preferably, described flow guide structure is successional.
As preferably, the sheet number of described fan blade is the odd number sheet.
As preferably, the upper surface of described fan blade is smooth smooth shape.
As preferably, be applied to machine in embedded type air conditioner with the centrifugal cutter of flow guide structure.
As preferably, described flow guide structure is applied to the back side of each fan blade of axial fan.
Beneficial effect of the present invention is, because the back side of each fan blade of centrifugal cutter of the present invention is provided with flow guide structure, this flow guide structure can change blade boundary layer parameter, boundary layer is separated postpones, stop air-flow to come off in the place's eddy generation of fan blade trailing edge, so the pneumatic noise of centrifugal cutter is contained effectively, effectively reduced the noise of centrifugal cutter from the source under the prerequisite that does not reduce air quantity of fan.Be arranged on the inner edge place, the back side of fan blade when flow guide structure, and for a series of when progressively being transitioned into the stepped corrugations shape projection on blade face near leaf margin part, it reduces the better effects if of the noise of centrifugal cutter, and does not affect air quantity of fan.
Description of drawings
Fig. 1 is provided by the invention with the structural representation of flow guide structure at centrifugal cutter;
Fig. 2 is the first embodiment's provided by the invention flow guide structure figure that decides what is right and what is wrong.
In figure:
1, fan blade; 2, flow guide structure; 3, stepped corrugations shape projection.
Embodiment
Further illustrate technological scheme of the present invention below by embodiment.
The centrifugal cutter that uses due to machine in present embedded type air conditioner in the running, the back side of its fan blade can produce eddy current, this eddy current not only can reduce the efficient of blower fan, and can produce noise, the noise of generation has a significant impact the running noise of centrifugal cutter.
The main inducing that the centrifugal cutter pneumatic noise produces mainly comprises two aspects: the one, and the pressure pulsation on the blade surface that the turbulent attached face that produces during the blade face of airflow passes fan blade 1 causes; The 2nd, during the airflow passes blade face, the attached aspect in surface, blade face develops into the trailing edge place eddy generation on the blade face that to a certain degree causes and comes off, and causes that the noise of air flow outlet increases.So, as long as change blade boundary layer parameter, boundary layer is separated postpone, stop air-flow to come off in the place's eddy generation of fan blade trailing edge, the pneumatic noise of centrifugal cutter is contained effectively.The de-noising mechanism of Here it is centrifugal cutter.
Find by the animal body surface features such as Asio otus being carried out observational study, its wing feather is the macro-effect of soft fluffy, wing edge contour is continuous circular arc dentation curve, the wing surface feather is mutually detained and is covered into sinusoidal curve shape form, form a kind of distinctive form and configuration characteristic with the wing surface geometric profile, this feature is the stepped corrugations shape, has stereovision clearly, and the body surface noise reduction system of this kind uniqueness can be moved in air dielectric fast and do not sent noise.
This bionical form is applied to traditional centrifugal cutter fan blade surface changes shape noise reduction optimal design, can effectively reduce the noise that in embedded type air conditioner, the machine centrifugal cutter produces in the running.In present patent application, the described form of freeing is the flow guide structure that is arranged on the centrifugal cutter fan blade.
Fig. 1 be flow guide structure provided by the invention in the use position of centrifugal cutter fan blade, Fig. 2 is the first embodiment's provided by the invention flow guide structure figure that decides what is right and what is wrong.As illustrated in fig. 1 and 2, leaf for observing more intuitively, remove the solar or lunar halo structure on centrifugal cutter top, only keep the part of bottom band fan blade 1.
Concrete, this kind centrifugal cutter comprises fan blade 1, is provided with flow guide structure 2 at each fan blade 1 back side.Described flow guide structure 2 is used for changing blade boundary layer parameter, boundary layer is separated postpone, and stops air-flow to come off in the place's eddy generation of fan blade trailing edge, reduces the noise of centrifugal cutter.In the present embodiment, also can be provided with at the back side of one or more fan blade flow guide structure 2.By Fig. 1, can see this flow guide structure 2 in the position of the fan blade 1 of this centrifugal cutter, namely be provided with a flow guide structure 2 at the inner edge place, the back side of each fan blade 1 of centrifugal cutter.Described flow guide structure 2 is used for changing blade boundary layer parameter, boundary layer is separated postpone, and stops air-flow to come off in the place's eddy generation of fan blade trailing edge, reduces the noise of centrifugal cutter.
The sectional view of the flow guide structure by the first embodiment shown in Figure 2, the concrete shape structure that can separate more deeply this flow guide structure 2.In this kind embodiment, described flow guide structure is arranged on the inner edge place, the back side of fan blade 1, is a series of stepped corrugations shape projections 3 that progressively are transitioned into the blade face from close leaf margin part.In the present embodiment, as a kind of optimal way, the length of described flow guide structure be the place fan blade length 1/2.
As a kind of optimal way, what described stepped corrugations shape projection 3 can be for discontinuity, as another kind of optimal way, stepped corrugations shape projection 3 also can be for successional.
As a kind of preferred version, the centrifugal cutter that uses with machine in traditional embedded type air conditioner is the same, and fan blade 1 quantity of fan of the present invention is generally the odd number sheet, and blade surface is smooth smooth.
Centrifugal cutter with flow guide structure of the present invention can be applied in embedded type air conditioner in machine, and described flow guide structure also can be applied to the back side of each fan blade of axial fan.
Know-why of the present invention has below been described in conjunction with specific embodiments.These are described just in order to explain principle of the present invention, and can not be interpreted as by any way limiting the scope of the invention.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other embodiment of the present invention, within these modes all will fall into protection scope of the present invention.
Claims (10)
1. the centrifugal cutter with flow guide structure, comprise fan blade, it is characterized in that: the flow guide structure that is provided with to change blade boundary layer parameter at the one or more fan blade back side.
2. the centrifugal cutter with flow guide structure according to claim 1, it is characterized in that: described flow guide structure is arranged on the inner edge place, the back side of fan blade, is a series of from progressively be transitioned into the stepped corrugations shape projection on blade face near the leaf margin part.
3. the centrifugal cutter with flow guide structure according to claim 1 and 2, it is characterized in that: the back side of all fan blade is provided with flow guide structure.
4. the centrifugal cutter with flow guide structure according to claim 1 and 2 is characterized in that: the length of described flow guide structure be the place fan blade length 1/2.
5. the centrifugal cutter with flow guide structure according to claim 1 and 2 is characterized in that: described flow guide structure is discontinuity.
6. the centrifugal cutter with flow guide structure according to claim 1 and 2, it is characterized in that: described flow guide structure is successional.
7. the centrifugal cutter with flow guide structure according to claim 1 and 2, it is characterized in that: the sheet number of described fan blade is the odd number sheet.
8. the centrifugal cutter with flow guide structure according to claim 1 and 2, it is characterized in that: the upper surface of described fan blade is smooth smooth shape.
9. the centrifugal cutter with flow guide structure according to claim 1 and 2 is characterized in that: it is applied to machine in embedded type air conditioner.
10. the centrifugal cutter with flow guide structure according to claim 1 and 2, it is characterized in that: described flow guide structure is applied to the back side of each fan blade of axial fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310051556.9A CN103115020B (en) | 2013-02-16 | 2013-02-16 | A kind of centrifugal cutter with flow guide structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310051556.9A CN103115020B (en) | 2013-02-16 | 2013-02-16 | A kind of centrifugal cutter with flow guide structure |
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| Publication Number | Publication Date |
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| CN103115020A true CN103115020A (en) | 2013-05-22 |
| CN103115020B CN103115020B (en) | 2015-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310051556.9A Active CN103115020B (en) | 2013-02-16 | 2013-02-16 | A kind of centrifugal cutter with flow guide structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107477685A (en) * | 2017-09-01 | 2017-12-15 | 青岛海尔空调电子有限公司 | Indoor apparatus of air conditioner |
| CN109281866A (en) * | 2018-12-07 | 2019-01-29 | 泰州市罡阳喷灌机有限公司 | The bionic blade of liquid-ring type self priming pump |
| CN110735811A (en) * | 2019-11-21 | 2020-01-31 | 广东美的制冷设备有限公司 | Centrifugal fan blade assembly and air conditioner |
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| JP2002276595A (en) * | 2001-03-16 | 2002-09-25 | Daikin Ind Ltd | Blower |
| JP2006097488A (en) * | 2004-09-28 | 2006-04-13 | Matsushita Electric Ind Co Ltd | Blower |
| CN101498317A (en) * | 2008-02-01 | 2009-08-05 | 富准精密工业(深圳)有限公司 | Heat radiating fun and impeller thereof |
| CN101725562A (en) * | 2008-10-28 | 2010-06-09 | 富准精密工业(深圳)有限公司 | Heat radiating fan and impeller thereof |
| CN201560981U (en) * | 2009-07-15 | 2010-08-25 | 鑫贺精密电子(东莞)有限公司 | Blade structure of radiation fan |
| CN201671881U (en) * | 2010-05-14 | 2010-12-15 | 珠海格力电器股份有限公司 | Axial flow fan blade and axial flow fan for air conditioner |
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2013
- 2013-02-16 CN CN201310051556.9A patent/CN103115020B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002276595A (en) * | 2001-03-16 | 2002-09-25 | Daikin Ind Ltd | Blower |
| JP2006097488A (en) * | 2004-09-28 | 2006-04-13 | Matsushita Electric Ind Co Ltd | Blower |
| CN101498317A (en) * | 2008-02-01 | 2009-08-05 | 富准精密工业(深圳)有限公司 | Heat radiating fun and impeller thereof |
| CN101725562A (en) * | 2008-10-28 | 2010-06-09 | 富准精密工业(深圳)有限公司 | Heat radiating fan and impeller thereof |
| CN201560981U (en) * | 2009-07-15 | 2010-08-25 | 鑫贺精密电子(东莞)有限公司 | Blade structure of radiation fan |
| CN201671881U (en) * | 2010-05-14 | 2010-12-15 | 珠海格力电器股份有限公司 | Axial flow fan blade and axial flow fan for air conditioner |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107477685A (en) * | 2017-09-01 | 2017-12-15 | 青岛海尔空调电子有限公司 | Indoor apparatus of air conditioner |
| CN109281866A (en) * | 2018-12-07 | 2019-01-29 | 泰州市罡阳喷灌机有限公司 | The bionic blade of liquid-ring type self priming pump |
| CN109281866B (en) * | 2018-12-07 | 2023-09-15 | 泰州市罡阳喷灌机有限公司 | Bionic blade of water ring type self-priming pump |
| CN110735811A (en) * | 2019-11-21 | 2020-01-31 | 广东美的制冷设备有限公司 | Centrifugal fan blade assembly and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103115020B (en) | 2015-09-02 |
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