CN1587713A - Interference noise reducing type centrifugal fan and cross flow fan - Google Patents
Interference noise reducing type centrifugal fan and cross flow fan Download PDFInfo
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- CN1587713A CN1587713A CN 200410067123 CN200410067123A CN1587713A CN 1587713 A CN1587713 A CN 1587713A CN 200410067123 CN200410067123 CN 200410067123 CN 200410067123 A CN200410067123 A CN 200410067123A CN 1587713 A CN1587713 A CN 1587713A
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Abstract
The invention belongs to the air blower noise-reducing technology field, the centrifugal air-machine and linked-flow air-machine fixed with ring vane array are commonly applied in areas like air-conditioning, ventilating, draining and so on. This ivnention has improved the impeller structure of routine centrifugal and linked-flow air-machine, which makes the noises produced by the different parts of the impeller in rotating intervene with each other and offset, thus reduces the noise greatly. The main technical scheme is: impeller incldues even number impeller part with the same cross section, according to the principle of the axial coinciding, the section amount to an impeller module, every two linked sections connect to an impeller even, ring vanes array in every impeller even, stagger a half of vane space; make every section in impeller even intensity of noise the same, the frequency similar, by controlling the length of impeller section separately.
Description
Technical field the invention belongs to blower fan noise reduction technology field
Carry on the back technology centrifugal blower and cross flow fan extensive use in fields such as air-conditioning, ventilation, air draft of ring-like array of vanes are installed.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 and cross flow fan.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: the shape of cross section that the integral wheel (Fig. 2) that will have traditional centrifugal blower of ring-like array of vanes is separated into even number section, each section impeller vertically remains unchanged, be connected into impeller sets by the principle of every section impeller dead in line--the impeller (Fig. 1) of interfere type centrifugal blower; Its feature also comprises: per 2 adjacent impeller sections are formed one " impeller idol ", the ring-like array of vanes of 2 impeller sections in each " impeller idol " 1/2 blade pitgh that misplaces in a circumferential direction: noise intensity is identical in the blower fan operation process, frequency spectrum is similar to make impeller section in each " impeller idol " in the mode of the length of controlling impeller section respectively.
Scheme two: the synchronous combination type blade wheel (Fig. 4) that will have traditional cross flow fan of ring-like array of vanes is reassembled into the impeller (Fig. 3) of interfere type cross flow fan by misplace the in a circumferential direction mode of 1/2 blade pitgh of ring-like array of vanes between every section impeller dead in line, the adjacent segment.
When fan operation, under the condition that impeller section is similar in the inlet flow field shape, air quantity is suitable in each of this interfere type centrifugal blower and cross flow fan " impeller idol ", its intensity of sound and spectral characteristic are basic identical, but the audio frequency phase place is opposite, 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: interference noise reducing type centrifugal fan impeller schematic perspective view
Fig. 2: common centrifugal blower fan blade wheel schematic perspective view
Fig. 3: interference noise reducing type cross flow fan impeller schematic perspective view
Fig. 4: common cross flow fan impeller schematic perspective view
Fig. 5: A-A sectional drawing
Fig. 6: B-B sectional drawing
Fig. 7: C-C sectional drawing
Fig. 8: D-D sectional drawing
Embodiment embodiment one: interference noise reducing 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 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. 1, this is the schematic representation of a single suction interference noise reducing type centrifugal fan, the main difference of this patent blower fan and the common centrifugal blower of single suction is the improvement of blade wheel structure.The shape of cross section that the impeller of interference noise reducing type centrifugal fan shown in Figure 1 is equivalent to the integral wheel of traditional centrifugal blower (Fig. 2) is separated into vertically even number section (this example is 2 sections), each section impeller remains unchanged, be connected into impeller sets by the principle of every section impeller dead in line--the impeller (Fig. 1) of interfere type centrifugal blower; It is characterized in that: per 2 adjacent impeller sections are formed one " impeller idol " (this example is 1 " an impeller idol "), the ring-like array of vanes of 2 impeller sections in each " impeller idol " 1/2 blade pitgh that misplaces in a circumferential direction; Noise intensity is identical in the blower fan operation process, frequency spectrum is similar to make impeller section in each " impeller idol " in the mode of the length of controlling impeller section respectively.
When blower fan turns round, interference noise reducing type centrifugal fan impeller and common centrifugal blower fan blade wheel all are of similar shape on any radial cross section, other structures of blower fan are all identical, the inlet flow field of blower fan is similar substantially with the exhaust flow field, so parameters such as the air quantity of two kinds of blower fans, blast, power are basic identical.Interfere " the fundamental frequency noise " of two impeller sections of centrifugal blower offsetting under the interference effect mutually, the more common centrifugal blower of its overall noise declines to a great extent.
Embodiment two: interference noise reducing type cross flow fan
Now in detail with reference to figure 4: this is a common cross flow fan impeller schematic perspective view that is used for split-type air conditioner indoor set, Fig. 7: C-C sectional drawing, Fig. 8: D-D sectional drawing, impeller is by a not shown motor driving, there is a housing in this impeller outside, air sucks from the impeller that the housing import of impeller upside is rotated, and discharges from the outlet of the housing of the downside of impeller.This impeller is made up of 6 fan sections, and each fan section has identical structure, and the phase place of fan blade array is all identical.
Fig. 3: this is an interference noise reducing type cross flow fan impeller schematic perspective view that is used for split-type air conditioner indoor set, Fig. 5: A-A sectional drawing, Fig. 6: B-B sectional drawing, each fan section of interference noise reducing type cross flow fan impeller has identical structure, this is identical with traditional cross flow fan impeller section structure, but ring-like array of vanes 1/2 blade pitgh (6 impeller sections can be used as 3 " impeller idols " and handle) that misplaces in a circumferential direction between the adjacent segment.Other parts of interference noise reducing type cross flow fan are identical in common cross flow fan, when blower fan turns round, interference noise reducing type cross flow fan impeller and common cross flow fan impeller all are of similar shape on any radial cross section, and other structures of blower fan are all identical, so the inlet flow field of blower fan is similar substantially with the exhaust flow field, so parameters such as the air quantity of two kinds of blower fans, blast, power are basic identical." the fundamental frequency noise " of 2 impeller sections in any one of interfere type cross flow fan " impeller idol " declines to a great extent the more common cross flow fan of overall noise of interfere type cross flow fan offsetting under the interference effect mutually.
More than be two typical application, but be not limited to above-mentioned application.
Claims (1)
1. the centrifugal blower and the cross flow fan of ring-like array of vanes are installed, it is characterized in that: its impeller is the identical impeller section of even number shape of cross section to be arranged and be connected into impeller sets by the mode of every section impeller dead in line; Per 2 adjacent impeller sections are formed one " impeller idol ", the ring-like array of vanes of 2 impeller sections in each " impeller idol " 1/2 blade pitgh that misplaces in a circumferential direction; Noise intensity is identical in the blower fan operation process, frequency spectrum is similar to make impeller section in each " impeller idol " in the mode of the length of controlling impeller section respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410067123 CN1587713A (en) | 2004-10-13 | 2004-10-13 | Interference noise reducing type centrifugal fan and cross flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410067123 CN1587713A (en) | 2004-10-13 | 2004-10-13 | Interference noise reducing type centrifugal fan and cross flow fan |
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| CN1587713A true CN1587713A (en) | 2005-03-02 |
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| CN 200410067123 Pending CN1587713A (en) | 2004-10-13 | 2004-10-13 | Interference noise reducing type centrifugal fan and cross flow fan |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100346078C (en) * | 2006-03-16 | 2007-10-31 | 上海交通大学 | Impeller with staggered leaf on front edge |
| 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 |
| CN108506230A (en) * | 2018-03-22 | 2018-09-07 | 广州勒夫蔓德电器有限公司 | A kind of wind turbine and air purifier |
| CN110914550A (en) * | 2017-07-10 | 2020-03-24 | 三菱电机株式会社 | Indoor unit of air conditioner |
| CN111609514A (en) * | 2020-05-19 | 2020-09-01 | 珠海格力电器股份有限公司 | Fan noise control method and device and air conditioning equipment |
-
2004
- 2004-10-13 CN CN 200410067123 patent/CN1587713A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100346078C (en) * | 2006-03-16 | 2007-10-31 | 上海交通大学 | Impeller with staggered leaf on front edge |
| 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 |
| CN110914550A (en) * | 2017-07-10 | 2020-03-24 | 三菱电机株式会社 | Indoor unit of air conditioner |
| CN108506230A (en) * | 2018-03-22 | 2018-09-07 | 广州勒夫蔓德电器有限公司 | A kind of wind turbine and air purifier |
| CN111609514A (en) * | 2020-05-19 | 2020-09-01 | 珠海格力电器股份有限公司 | Fan noise control method and device and air conditioning equipment |
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Addressee: Wu Jinsong Document name: Notification before expiration of term |
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