CN101457946A - Bionic micropore noise reduction structure for smoke exhaust system - Google Patents
Bionic micropore noise reduction structure for smoke exhaust system Download PDFInfo
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- CN101457946A CN101457946A CNA2007101645808A CN200710164580A CN101457946A CN 101457946 A CN101457946 A CN 101457946A CN A2007101645808 A CNA2007101645808 A CN A2007101645808A CN 200710164580 A CN200710164580 A CN 200710164580A CN 101457946 A CN101457946 A CN 101457946A
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- spiral case
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Abstract
The invention discloses a bionic microporous noise-reducing structure which is used for an oil fume extraction system. The structure comprises a shell body; oil fume passes by the inner cavity of the shell body and contacts with the inner wall of the shell body; the invention is characterized in that the outer side of the shell body is fixedly provided with a noise-reducing box which is enclosed at the periphery; the noise-reducing box is internally provided with at least one layer of porous plate which is distributed with tight millipores, so the noise-reducing box is divided into at least an inner cavity and an outer cavity; the shell body which is opposite to the porous plate and enclosed in the noise-reducing box is coated and distributed with an oil-preventing coat, moreover, bar-shaped pores are tightly distributed on the shell body; the inner cavity of the shell body is communicated with the inner cavity of the noise-reducing box by the bar-shaped pores, moreover, the bar-shaped pores are slits of louver window type and the vanes of the slits are self-locked. The invention uses a principle of fluid mechanics for effectively preventing the oil fume from blocking the millipores at places such as cochlear duct, air exhaust pipe and the like, finally ensures that the noise-reducing box can effectively achieves the aims of long-term sound absorption and noise reduction, and is especially suitable for household oil fume extraction machine.
Description
Technical field
The present invention relates to fume extracting system, be specifically related to a kind of bionic micropore noise reduction structure that is used for fume extracting system.
Background technology
Places such as family kitchen, kitchen, restaurant can produce a large amount of oil smoke inevitably, and for keeping kitchen cleaning and health, fume extracting system has become these local imperative equipment.In order to satisfy people's life requirement, multiple fume extracting system has appearred on the market already.Usually, fume extracting system all comprises and takes out (suction) lampblack absorber and export oil smoke outdoor or be delivered to the pipeline of oil smoke exhaust treatment system.For taking out (suction) lampblack absorber, wherein relative suction is big, noise is lower is liked by numerous people because of it has with the smoke exhaust ventilator of band centrifugal blower again.Even if but like this, because the existence of the noise of centrifugal blower own, and air-flow moves in volute of blower and air-flow motion turbulization and noise of sending in pipeline, the stack of these noises makes smoke exhaust ventilator still have certain noise.Remove the oil smoke effect for what improve smoke exhaust ventilator, smoke exhaust ventilator production firm can improve the air quantity and/or the blast of smoke exhaust ventilator usually, even improves the power of centrifugal blower in the smoke exhaust ventilator, and this can further increase the noise of whole fume extracting system again.Cross the existence of very noisy, the housewife and the kitchen operation personnel that work under this noise circumstance for a long time produce headache, agitation with making, bad phenomenon such as have palpitation, and healthy causing had a strong impact on.Designers are overcoming this defective hardy for this reason, so that come for people provide more humane product, as Chinese patent Granted publication number for " a kind of noise reduction spiral case that is used for range hood " of CN2656683Y be exactly wherein an example improve structure, this spiral case includes snail plate and the front and back side plate that is assembled into spiral case mutually, on the snail plate, be fixed with the noise reduction case of periphery sealing, in the noise reduction case, be provided with the orifice plate of a densely covered micropore, this orifice plate is divided into ante-chamber and back cavity with the noise reduction case, and is relative with this orifice plate and be closed on the snail plate part in the noise reduction case and be sealed with the micropore that communicates with spiral case inside.After adopting said structure, make the air sound energy consumption that in more aperture, rubs back and forth, thereby strengthened anti-acoustic capability effectively.In addition, the patent No. is that the Chinese utility model patent of CN03258257.9 and Chinese invention patent application that application number is CN200610117663.7 etc. have also proposed improved technical scheme to this, employing all be the microwell plate technology basically.
Above microwell plate structure is found in actual use, because the oil smoke that the air-flow in the smoke exhaust ventilator is entrained with, thereby it is not extremely clean, service time one is long, the oil smoke that each micropore will be piled up blocks, make the air-flow sound energy consumption that can't in micropore, rub back and forth, thereby do not reach the purpose of noise reduction, noise elimination.
Summary of the invention
Technical problem to be solved by this invention is the present situation at prior art, a kind of denoising structure that fume extracting system volute of blower and pipeline etc. are located that is used for is provided, it utilizes bionics and hydromechanical principle, prevent that effectively oil smoke from blocking the micropore in the denoising structure, can realize the purpose of effective sound absorption, noise reduction for a long time to guarantee denoising structure.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: this is used for the bionic micropore noise reduction structure of fume extracting system, comprise housing, oil smoke promptly passes through in this housing inner chamber and contacts with the inwall of this housing, it is characterized in that the outside of described housing is fixed with the noise reduction box of periphery sealing, be provided with the orifice plate of the densely covered micropore of one deck at least in the noise reduction box, thereby the noise reduction box is divided into atrium and exocoel at least, relative with described orifice plate and be closed on the housing in the noise reduction box and be coated with anti-oil coating, and be densely covered with bar hole on this place's housing, the inner chamber of housing promptly is connected by the atrium of these bar holes with the noise reduction box, and, described bar hole is the slot that is louvre type, the blade of slot extends to hull outside from described surface of shell, and the direction of extending is opposite with the flow direction of oil smoke in the housing.Anti-oil coating should be coated on the inner surface of housing at least, promptly with oil smoke the side that contacts is arranged, and certainly, it is good all being coated with anti-oil coating with inside and outside surface even whole housing.
The blade of described slot is seen the serpentine that roughly is rounding off from its cross section.The serpentine design of rounding off helps reducing windage and reduces the bump of air-flow to slot, thereby avoids new noise source occurring, helps reducing noise.
Described orifice plate is two-layer and described noise reduction box is divided into atrium, lumen and exocoel.
Described housing is the spiral case of lampblack absorber, and this spiral case comprises snail plate and front and back side plate, and described slot is arranged on this snail plate, and the snail plate place outside that is provided with slot promptly is fixed with described noise reduction box.And the trend of described slot is being good with the axial consistent of spiral case.Described noise reduction box can be a resonator, and is arranged on the snail tongue place of spiral case, certainly, also can be arranged on a noise reduction box in other places.Another selection is: the number of described noise reduction box is two, is the top in the air outlet place direction of spiral case, and this two noise reductions box branch is located at the base angle, both sides of spiral case.In order to obtain better noise reduction, can also be: the number of described noise reduction box be three, is the top in the air outlet place direction of spiral case, and wherein two noise reduction box branches are located at the base angle, both sides of spiral case, a snail tongue place that is arranged on spiral case.In order further to improve the noise reduction of noise reduction box, described noise reduction box can be set to be coated on the whole described snail plate outside, and it is tabular and be oppositely arranged with described snail plate that the orifice plate in the described noise reduction box also is snail.
Described housing is the discharge pipe of fume extracting system, and described slot is arranged on this discharge pipe, and the discharge pipe place outside that is provided with slot promptly is fixed with described noise reduction box.
Principle of the present invention and characteristics:
1, on principle, anti-oil coating among the present invention and the design of venetian blind type slot can be generically and collectively referred to as grease proofing sheath.Grease proofing sheath has oily dirt free character on the one hand, because oil smoke contacts with sheath when flowing through, air velocity is little at the boundary-layer place, ordinary circumstance can make the oil in the oil smoke glue or condense in surface of shell, because this grease proofing sheath is handled through adhesion protective oil, there is one deck adhesion protective oil coating on the surface, so, oil on it only can flow away, can be sticking more not thick more.On the other hand, the design in bar shaped slot hole, the particularly serpentine of rounding off design, oil smoke can not be entered after the grease proofing sheath, stopped the possibility that slot and orifice plate are blocked, thereby can prevent effectively that oil smoke from blocking the micropore on snail plate or the discharge pipe etc., guarantee that finally the noise reduction box can realize the purpose of effective sound absorption, noise reduction for a long time.
2, using for reference the shark squama is divided into the flow field two-layer, internal layer is the viscous sublayer of low speed, skin is that the high relatively boundary-layer of speed flows, the present invention is the flow field of close housing also separated into two parts, a part is the static flow field of hull outside, a part is the internal flow of grease proofing sheath inboard (being the housing inner chamber), and internal flow guarantees aerodynamic performance.When gas begins to flow because the gas flow of grease proofing sheath inboard (as snail plate inboard), so the static pressure of grease proofing sheath inboard is low, and the static pressure height of gas in the noise reduction box, thus gas by in the noise reduction box to outside mobile, oil smoke advances less than in the noise reduction box.Static balance inside and outside noise reduction box after a period of time of flowing does not have gas flow inside and outside the grease proofing sheath, and oil smoke is not entered yet, and enters so sheath has protected oil smoke from start to finish.Like this, the bar shaped slot had both guaranteed the unimpeded of acoustical passage, can guarantee that again olesome does not enter the noise reduction orifice plate, had also guaranteed the lower resistance low-noise performance of gas flow simultaneously.
3, slot is hidden under the flow direction, and downstream direction, and air-flow does not directly blow groove, thus gas can in grease proofing sheath, not flow, so the flow dynamics that grease proofing sheath flows is good.
4, because grease proofing sheath has groove can make a layer inside and outside gas communication, so the sound passage is unimpeded.With the spiral case is example, can import the rotational noise that air-flow produces at snail tongue place into snail tongue resonator at snail tongue resonator place and carry out noise reduction.At orifice plate noise reduction place, the noise in the spiral case can be passed into orifice plate noise reduction box by slotted eye, reach the purpose of noise reduction.Design different orifice plate combinations and can draw different frequency noises, make whole noise reduction reach requirement.
Description of drawings
Fig. 1 is the three-dimensional structure diagram of the embodiment of the invention one;
Fig. 2 is the three-dimensional structure diagram that removes behind the cover plate of noise reduction box front;
Fig. 3 is the three-dimensional structure diagram of noise reduction box among Fig. 2;
Fig. 4 is the three-dimensional structure diagram of snail plate among Fig. 2;
Fig. 5 is the sectional structure schematic diagram of the embodiment of the invention one;
Fig. 6 is the partial structurtes schematic diagram of the embodiment of the invention;
Fig. 7 is the three-dimensional structure diagram of the embodiment of the invention two;
Fig. 8 is the three-dimensional structure diagram of snail plate among Fig. 7;
Fig. 9 is the sectional structure schematic diagram of the embodiment of the invention three.
The specific embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
As Fig. 1～shown in Figure 6, be embodiments of the invention one.As shown in the figure, present embodiment is the bionic micropore noise reduction spiral case on the smoke exhaust ventilator in the fume extracting system, and it is made up of snail plate 1, front side board 2, back side panel 3, two noise reduction boxes 4 and a snail tongue resonator 5.The outside of snail plate 1 is sealed and be fixed on to the periphery of noise reduction box 4, resonator 5.Be provided with the orifice plate 6 of two-layer densely covered micropore in the noise reduction box 4, thereby the noise reduction box is divided into atrium 7, lumen 8 and exocoel 9.Be provided with the orifice plate 10 of the densely covered micropore of one deck in the resonator 5, thereby resonator 5 is divided into atrium 11 and exocoel 12.
Described resonator 5 is arranged on snail tongue 13 places of spiral case.Air outlet 14 place directions in spiral case are the top, and two noise reduction boxes were located at the base angle, both sides of spiral case in 4 minutes.
The inside and outside surface of snail plate 1 is coated with anti-oil coating (not shown), and relative with described orifice plate 6,10 and be closed in the slot 15 of the axial unanimity that is densely covered with the trend that is louvre type and spiral case on the interior snail plate 1 of noise reduction box 4, resonator 5.The cross section of the blade 16 of slot 15 roughly is the serpentine of rounding off, and it extends to snail plate 1 outside from snail plate 1 surface, and the direction of extending is opposite with the flow direction of oil smoke in the spiral case.Spiral case inside promptly is connected with the atrium 7,11 of noise reduction box 4, resonator 5 by these slots 15.
As Fig. 7, shown in Figure 8, be embodiments of the invention two.As Fig. 7, shown in Figure 8, and referring to Fig. 5, Fig. 6, what as seen present embodiment and embodiment one were different is: described noise reduction box 4 is for being coated on outside the whole snail plate 1, and be densely covered with described slot 15 on the monoblock snail plate 1, and it is tabular and be oppositely arranged with described snail plate 1 that the orifice plates 6 in the described noise reduction box 4 also are snail.
As shown in Figure 9, be embodiments of the invention three.Present embodiment is the discharge pipe of the band bionic micropore noise reduction structure of fume extracting system, as shown in Figure 9, this discharge pipe comprises tube body 17, the outside of tube body 17 is fixed with the noise reduction box 18 of periphery sealing, be provided with the orifice plate 19 of the densely covered micropore of one deck in the noise reduction box 18, thereby noise reduction box 18 is divided into atrium 20 and exocoel 21, presses close to noise reduction box 18 outer wall places in the exocoel 21 and be provided with the glass silk flosssilk wadding layer of catching with gauze 22, and between glass silk flosssilk wadding layer 22 and orifice plate 19, be provided with supporting construction 23.The inner surface of tube body 17 is coated with anti-oil coating (not shown), and to should noise reduction box 18 places being densely covered with the slot 24 of hoop.The cross section of the blade 25 of slot 24 roughly is the serpentine of rounding off, and it extends to tube body 17 outsides from tube body 17 surfaces, and the direction of extending is opposite with the flow direction of oil smoke in the tube body 17.Tube body 17 inside promptly are connected with the atrium 20 of noise reduction box 18 by these slots 24.
Claims (10)
1, a kind of bionic micropore noise reduction structure that is used for fume extracting system, comprise housing, oil smoke promptly passes through in this housing inner chamber and contacts with the inwall of this housing, it is characterized in that the outside of described housing is fixed with the noise reduction box of periphery sealing, be provided with the orifice plate of the densely covered micropore of one deck at least in the noise reduction box, thereby the noise reduction box is divided into atrium and exocoel at least, relative with described orifice plate and be closed on the housing in the noise reduction box and be coated with anti-oil coating, and be densely covered with bar hole on this place's housing, the inner chamber of housing promptly is connected by the atrium of these bar holes with the noise reduction box, and, described bar hole is the slot that is louvre type, the blade of slot extends to hull outside from described surface of shell, and the direction of extending is opposite with the flow direction of oil smoke in the housing.
2, bionic micropore noise reduction structure according to claim 1 is characterized in that the blade of described slot is seen the serpentine that roughly is rounding off from its cross section.
3, bionic micropore noise reduction structure according to claim 1 is characterized in that described orifice plate is two-layer and described noise reduction box is divided into atrium, lumen and exocoel.
4, according to claim 1 or 2 or 3 described bionic micropore noise reduction structures, it is characterized in that described housing is the spiral case of lampblack absorber, this spiral case comprises snail plate and front and back side plate, and described slot is arranged on this snail plate, and the snail plate place outside that is provided with slot promptly is fixed with described noise reduction box.
5, bionic micropore noise reduction structure according to claim 4, the trend that it is characterized in that described slot is axial consistent with spiral case.
6, bionic micropore noise reduction structure according to claim 4 is characterized in that described noise reduction box is a resonator that is arranged on the snail tongue place of spiral case.
7, bionic micropore noise reduction structure according to claim 4, the number that it is characterized in that described noise reduction box is two, is the top in the air outlet place direction of spiral case, this two noise reductions box branch is located at the base angle, both sides of spiral case.
8, bionic micropore noise reduction structure according to claim 4, the number that it is characterized in that described noise reduction box is three, air outlet place direction in spiral case is the top, and wherein two noise reduction box branches are located at the base angle, both sides of spiral case, the resonator for the snail tongue place that is arranged on spiral case.
9, bionic micropore noise reduction structure according to claim 4 is characterized in that described noise reduction box for being coated on the whole described snail plate outside, and it is tabular and be oppositely arranged with described snail plate that the orifice plate in the described noise reduction box also is snail.
10, according to claim 1 or 2 or 3 described bionic micropore noise reduction structures, it is characterized in that described housing is the discharge pipe of fume extracting system, described slot is arranged on this discharge pipe, and the discharge pipe place outside that is provided with slot promptly is fixed with described noise reduction box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101645808A CN101457946B (en) | 2007-12-11 | 2007-12-11 | Bionic micropore noise reduction structure for smoke exhaust system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101645808A CN101457946B (en) | 2007-12-11 | 2007-12-11 | Bionic micropore noise reduction structure for smoke exhaust system |
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| CN101457946A true CN101457946A (en) | 2009-06-17 |
| CN101457946B CN101457946B (en) | 2010-11-24 |
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| CN2007101645808A Active CN101457946B (en) | 2007-12-11 | 2007-12-11 | Bionic micropore noise reduction structure for smoke exhaust system |
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| CN102042628A (en) * | 2011-01-10 | 2011-05-04 | 宁波方太厨具有限公司 | Range hood with flow-stabilizing and noise-reducing structure |
| CN104314874A (en) * | 2014-10-16 | 2015-01-28 | 珠海格力电器股份有限公司 | Volute and fan comprising volute |
| CN105157083A (en) * | 2015-09-30 | 2015-12-16 | 宁波方太厨具有限公司 | Volute of extractor hood |
| CN105526193A (en) * | 2016-02-29 | 2016-04-27 | 宁波方太厨具有限公司 | Blower volute for extractor hoods |
| CN106678083A (en) * | 2016-12-28 | 2017-05-17 | 中联重科股份有限公司 | Resonant cavity noise elimination device, noise-eliminating volute, centrifugal fan and road cleaning device |
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| CN111043637A (en) * | 2020-01-02 | 2020-04-21 | 宁波方太厨具有限公司 | Intelligent adjusting method for noise of range hood |
| CN111750393A (en) * | 2019-03-29 | 2020-10-09 | 青岛海尔智能技术研发有限公司 | Fume exhauster |
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| US6866481B2 (en) * | 2003-01-02 | 2005-03-15 | Chao-Cheng Chiang | Ventilator having an optimum fan structure |
| CN2632537Y (en) * | 2003-08-11 | 2004-08-11 | 王全龄 | Low-noise cooker hood |
| CN2656683Y (en) * | 2003-11-06 | 2004-11-17 | 宁波方太厨具有限公司 | Noise reducing casing for kitchen ventilator |
| ITPD20060193A1 (en) * | 2006-05-16 | 2007-11-17 | Ln 2 Srl A Socio Unico | CENTRIFUGAL FAN, PARTICULARLY FOR FUME EXTRACTOR HOODS AND EXTRACTORS |
| CN2926878Y (en) * | 2006-07-03 | 2007-07-25 | 樱花卫厨（中国）有限公司 | Laterally sucking cooker hood |
| CN200943901Y (en) * | 2006-07-05 | 2007-09-05 | 浙江帅康电气股份有限公司 | Improved oil smoke absorber spiral casing and oil smoke absorber installed with same |
| CN2924364Y (en) * | 2006-07-05 | 2007-07-18 | 浙江帅康电气股份有限公司 | Range hood shell and range hood mounted with same |
| CN1971147A (en) * | 2006-10-27 | 2007-05-30 | 上海应用技术学院 | Silencing range hood |
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| CN102042628B (en) * | 2011-01-10 | 2012-08-22 | 宁波方太厨具有限公司 | Range hood with flow-stabilizing and noise-reducing structure |
| CN102042628A (en) * | 2011-01-10 | 2011-05-04 | 宁波方太厨具有限公司 | Range hood with flow-stabilizing and noise-reducing structure |
| CN104314874A (en) * | 2014-10-16 | 2015-01-28 | 珠海格力电器股份有限公司 | Volute and fan comprising volute |
| CN105157083A (en) * | 2015-09-30 | 2015-12-16 | 宁波方太厨具有限公司 | Volute of extractor hood |
| CN105157083B (en) * | 2015-09-30 | 2018-04-17 | 宁波方太厨具有限公司 | A kind of range hood |
| CN105526193A (en) * | 2016-02-29 | 2016-04-27 | 宁波方太厨具有限公司 | Blower volute for extractor hoods |
| CN105526193B (en) * | 2016-02-29 | 2019-02-26 | 宁波方太厨具有限公司 | A kind of volute of blower for range hood |
| CN106678083B (en) * | 2016-12-28 | 2019-04-19 | 长沙中联重科环境产业有限公司 | Resonant cavity silencing apparatus, noise elimination spiral case, centrifugal blower and road cleaning device |
| CN106678083A (en) * | 2016-12-28 | 2017-05-17 | 中联重科股份有限公司 | Resonant cavity noise elimination device, noise-eliminating volute, centrifugal fan and road cleaning device |
| EP3421891A1 (en) * | 2017-06-27 | 2019-01-02 | BSH Hausgeräte GmbH | Cooker hood |
| CN107388317A (en) * | 2017-08-23 | 2017-11-24 | 华帝股份有限公司 | A kind of denoising structure of range hood |
| CN108167910A (en) * | 2018-03-12 | 2018-06-15 | 杭州老板电器股份有限公司 | Active active noise reducing device and range hood |
| CN110274277A (en) * | 2018-03-13 | 2019-09-24 | 宁波方太厨具有限公司 | A kind of noise reducing type range hood and its method for noise reduction control |
| CN110274277B (en) * | 2018-03-13 | 2024-01-23 | 宁波方太厨具有限公司 | Noise-reduction type range hood and noise-reduction control method thereof |
| CN111750393A (en) * | 2019-03-29 | 2020-10-09 | 青岛海尔智能技术研发有限公司 | Fume exhauster |
| CN111043637A (en) * | 2020-01-02 | 2020-04-21 | 宁波方太厨具有限公司 | Intelligent adjusting method for noise of range hood |
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| CN101457946B (en) | 2010-11-24 |
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