CN1603631A - Inclined interference noise reduction type centrifugal fan - Google Patents
Inclined interference noise reduction type centrifugal fan Download PDFInfo
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- CN1603631A CN1603631A CN 200410067646 CN200410067646A CN1603631A CN 1603631 A CN1603631 A CN 1603631A CN 200410067646 CN200410067646 CN 200410067646 CN 200410067646 A CN200410067646 A CN 200410067646A CN 1603631 A CN1603631 A CN 1603631A
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Abstract
The invention belongs to the air blower noise reduction technology, the slanting interference noise reduction gentrifugalism function ventilates domain and so on row of in wind in the air conditioning the widespread application. The invention improved the traditional gentrifugalism air blower impeller structure.Causes the air blower impeller to be different partially the noise which produces in the air blower generating process mutually to interfere and the counterbalance, thus largely reduces the air blower noise. The main technical plan is: Will have the ring-like leaf blade array the traditional gentrifugalism air blower ordinary wind motorized ship (chart 2) to reverse the certain angle after the circumference direction to form the slanting interference will be the centrifugal air blower impeller (chart 1); Its impeller characteristic also includes: (1) each section of impellers lateral section shape maintenance is same; (2) reverses after the impeller leaf blade's beginning and the end point in the circumference distance for leaf blade's in circumference gap integral multiple. (3) the air blower other part and the traditional air blower is same. At the same time, the patent impeller including has the above characteristic the impeller combination (chart 3, chart 4, chart 5).
Description
Technical field the invention belongs to blower fan noise reduction technology field
Background technique is equipped with centrifugal blower and cross flow fan extensive use in fields such as air-conditioning, ventilation, air draft of ring-like array of vanes.2003101005698.3 high efficiency centrifugal blowers), at interval Multiple Combination of blade is (as Chinese patent application: the crossflow fan of 99106786.X air conditioner), solid vane is changed system into the damping processing etc. that hollow blade and liner muffler material volute of blower shape adjustments, volute of blower outsourcing sound insulating material, blower fan inlets and putlets of ventilation add silencing apparatus, blower fan pedestal fan noise is the by-product of association in the blower fan operation process, and at present the reduction fan noise method that adopts mainly contains: the aerofoil profile of adjusting the blade of draught fan impeller is (as Chinese patent application:.
Summary of the invention the present invention has improved the blade wheel structure of traditional centrifugal blower.The noise of the different piece generation of draught fan impeller is interfered and counteracting mutually, significantly to reduce fan noise in the blower fan operation process.
Scheme one: this draught fan impeller (Fig. 1) has a not shown rotating disk, this rotating disk is on the right side of illustrated impeller, link with each blade right side end points, there is the axle of a not shown substantially horizontal in rotating disk central authorities, by a not shown motor driving, impeller outer has a not shown spiral case, impeller has spaced apart belt fin or array of vanes, when rotating under the driving of draught fan impeller at motor, air is radially discharged by impeller and through the outlet of spiral case then from impeller left side, along axially being inhaled in the impeller of draught fan impeller.
The common impeller (Fig. 2) that will have traditional centrifugal blower of ring-like array of vanes forms inclined interference formula centrifugal blower fan blade wheel (Fig. 1) after along the circumferential direction reversing certain angle; The feature of inclined interference formula centrifugal blower fan blade wheel also comprises: the shape of cross section of (1) each section impeller keeps identical; (2) starting point (starting point of a blade in the scheme one is A) of the blade of the impeller after reversing and terminal point (terminal point of a blade in the scheme one is B) are in the distance of circumferencial direction (in the scheme one, this distance is 2L) for blade at the interval of circumferencial direction (in the scheme one, this is spaced apart L) integral multiple γ (γ=1,2,3 ...) (γ in the scheme one=2).(3) other part-structures of blower fan are identical with conventional fan.
When fan operation, the blade of the impeller of inclined interference formula centrifugal blower can be divided into equal in length (γ * 2) section (in the scheme one, it is 4 sections), under the condition similar in the inlet flow field shape, that air quantity is suitable, adjacent two sections intensity of sound and spectral characteristic are basic identical, but the audio frequency phase place is just in time opposite, and its " fundamental frequency noise " (wherein fundamental frequency equals the product of rotation speed of fan and fan blade number, and " fundamental frequency noise " refers to the noise very high with the fundamental frequency degree of correlation) offsetting under the interference effect mutually.Thereby reach the purpose of the blower fan overall noise that descends significantly.
Description of drawings Fig. 1: single suction interference noise reducing type centrifugal fan impeller schematic perspective view
Fig. 2: common single suction centrifugal blower fan blade wheel schematic perspective view
Fig. 3: 2 impeller schematic perspective view of single suction inclined interference noise reduction type centrifugal fan
Fig. 4: 1 impeller schematic perspective view of double suction inclined interference noise reduction type centrifugal fan
Fig. 5: 2 impeller schematic perspective view of double suction inclined interference noise reduction type centrifugal fan
Embodiment embodiment one: single suction inclined interference noise reduction type centrifugal fan
Now in detail with reference to figure 2, this is the schematic representation of a common centrifugal blower fan blade wheel of single suction, this draught fan impeller is by a not shown rotating disk, this rotating disk is on the right side of illustrated impeller, link with each blade right side end points, there is the axle of a not shown substantially horizontal in rotating disk central authorities, by a not shown motor driving, impeller outer has a not shown spiral case, impeller has spaced apart belt fin or array of vanes, when rotating under the driving of draught fan impeller at motor, air is from the impeller left side, along axially being inhaled in the impeller of draught fan impeller, radially discharge then by impeller and through the outlet of spiral case.
Now in detail with reference to figure 1, this is the schematic representation of a single suction inclined interference noise reduction type centrifugal fan impeller, and its embodiment is explanation in " summary of the invention " part.
Embodiment two: 2 of single suction inclined interference noise reduction type centrifugal fan
Now in detail with reference to figure 3: this draught fan impeller has a not shown rotating disk, this rotating disk is on the right side of illustrated impeller, link with each blade right side end points, there is the axle of a not shown substantially horizontal in rotating disk central authorities, by a not shown motor driving, impeller outer has a not shown spiral case, impeller has spaced apart belt fin or array of vanes, when rotating under the driving of draught fan impeller at motor, air is radially discharged by impeller and through the outlet of spiral case then from impeller left side, along axially being inhaled in the impeller of draught fan impeller.
Fig. 3, this is 2 an impeller schematic representation of a single suction inclined interference noise reduction type centrifugal fan, its essence is the combination after the blade butt joint of impeller of two single suction inclined interference noise reduction type centrifugal fans shown in Figure 1.(impeller in this scheme is a broken line type, A-B-C among the figure is a broken line type blade, through the B point, along the circumferential direction impeller is divided into 2 parts, left part can be regarded the blade-section of an impeller in the similar scheme one as, the right side part can be regarded the blade-section of an impeller in the similar scheme one as
The method of its interference noise reducing is with the explanation of " summary of the invention " part.
Embodiment three: 1 of double suction inclined interference noise reduction type centrifugal fan
Now in detail with reference to figure 4: this draught fan impeller has a not shown rotating disk, link in the middle of the circumferential surface that this rotating disk process B is ordered and each blade, there is the axle of a not shown substantially horizontal in rotating disk central authorities, by a not shown motor driving, impeller outer has a not shown spiral case, impeller has spaced apart belt fin or array of vanes, when rotating under the driving of draught fan impeller at motor, air is radially discharged by impeller and through the outlet of spiral case then from the impeller left and right sides, along axially being inhaled in the impeller of draught fan impeller.
Fig. 4, this is 1 an impeller schematic representation of a double suction inclined interference noise reduction type centrifugal fan, this structure is equivalent to the symmetry combination of two single suction inclined interference noise reduction type centrifugal fan impellers (embodiment one).Impeller in this scheme is a broken line type, A-B-C among the figure is a broken line type blade, through the B point, along the circumferential direction impeller is divided into 2 parts, left part can be regarded the blade-section of an impeller in the similar scheme one as, the right side part can be regarded the blade-section of an impeller in the similar scheme one as
The method of its interference noise reducing is with the explanation of " summary of the invention " part.
Embodiment three: 2 of double suction inclined interference noise reduction type centrifugal fan
Now in detail with reference to figure 5: this is 2 an impeller schematic representation of a double suction inclined interference noise reduction type centrifugal fan, and this similar is in embodiment two.The difference of this scheme and embodiment two is: the blade of this programme is linear.
The method of its interference noise reducing is with the explanation of " summary of the invention " part.
More than be four typical application, but be not limited to above-mentioned application.
Claims (2)
1, the impeller of inclined interference formula centrifugal blower has ring-like array of vanes, impeller keeps identical along each shape of cross section of circumference; , it is characterized in that: the blade of (1) impeller along the circumferential direction reverses certain angle (Fig. 1); (2) starting point and the terminal point of the blade of the impeller after reversing are the integral multiple at the interval of blade on circumference in the distance on the circumference.
2, the impeller of inclined interference formula centrifugal blower comprise combination with impeller of feature shown in the right 1 (Fig. 3, Fig. 4, Fig. 5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410067646 CN1603631A (en) | 2004-10-29 | 2004-10-29 | Inclined interference noise reduction type centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410067646 CN1603631A (en) | 2004-10-29 | 2004-10-29 | Inclined interference noise reduction type centrifugal fan |
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| Publication Number | Publication Date |
|---|---|
| CN1603631A true CN1603631A (en) | 2005-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410067646 Pending CN1603631A (en) | 2004-10-29 | 2004-10-29 | Inclined interference noise reduction type centrifugal fan |
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| CN (1) | CN1603631A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3064776A4 (en) * | 2013-10-29 | 2017-07-19 | Mitsubishi Electric Corporation | Cross-flow fan and air conditioner |
| EP3064777A4 (en) * | 2013-10-29 | 2017-07-19 | Mitsubishi Electric Corporation | Cross-flow fan and air conditioner |
| CN108131324A (en) * | 2018-01-15 | 2018-06-08 | 汕头大学 | A kind of small-sized multi-wing centrifugal exhaust fan of highly effective low noise and impeller |
-
2004
- 2004-10-29 CN CN 200410067646 patent/CN1603631A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3064776A4 (en) * | 2013-10-29 | 2017-07-19 | Mitsubishi Electric Corporation | Cross-flow fan and air conditioner |
| EP3064777A4 (en) * | 2013-10-29 | 2017-07-19 | Mitsubishi Electric Corporation | Cross-flow fan and air conditioner |
| CN108131324A (en) * | 2018-01-15 | 2018-06-08 | 汕头大学 | A kind of small-sized multi-wing centrifugal exhaust fan of highly effective low noise and impeller |
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| PB01 | Publication | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Wu Jinsong Document name: Notification before expiration of term |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |