CN105509119A - Noise reduction device and extractor hood - Google Patents
Noise reduction device and extractor hood Download PDFInfo
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- CN105509119A CN105509119A CN201610092095.3A CN201610092095A CN105509119A CN 105509119 A CN105509119 A CN 105509119A CN 201610092095 A CN201610092095 A CN 201610092095A CN 105509119 A CN105509119 A CN 105509119A
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- noise
- noise reduction
- denoising device
- range hood
- base plate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2035—Arrangement or mounting of filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ventilation (AREA)
Abstract
The invention provides a noise reduction device and an extractor hood. The noise reduction device comprises a noise reduction cover, wherein the noise reduction cover is arranged in front of a volute of the extractor hood and located above an air inlet of the volute, and filtering holes are formed in the noise reduction cover and used for reducing the noise produced during operation of the extractor hood. The noise reduction device enables the noise produced during operation of the extractor hood to enter the noise reduction cover through the filtering holes formed in the noise reduction cover, a frequency spectrum of the noise is transformed into a high-frequency spectrum or an ultra-high-frequency spectrum due to noise elimination of the small holes when the noise passes through the filtering holes, accordingly audible sound components in the frequency spectrum of the noise are remarkably reduced, interferences and hurts brought to a human body are decreased, further the user experience is improved, and the market competitiveness of a product is improved. In addition, the noise reduction device is arranged in front of the volute of the extractor hood and located above the air inlet of the volute, so that the air inlet of the volute is not blocked, and the air performance of the extractor hood is almost not influenced.
Description
Technical field
The present invention relates to kitchen utensils technical field, in particular to a kind of denoising device and the range hood comprising this denoising device.
Background technology
Along with the lifting of quality of the life, user, when choosing range hood, more and more pays close attention to the size that it runs noise, simultaneously the domestic management and control standard also improved range hood operation noise.And the problem that the Wind Volume range hood ubiquity noise sold in the market is larger, in order to reduce the noise produced when range hood runs, producer adopts the method for filling porous sound-absorbing material usually, but sound-absorbing porous material is good to medium-high frequency soundproof effect, poor to low frequency soundproof effect.Such as, have in prior art and adopt smoke pipe parcel sound-absorbing material to reduce the design of range hood noise, but this design is decrease for the noise that smoke pipe vibrates, but the core noise source for cigarette machine itself is pneumatic and mechanical vibration noise does not obviously reduce, especially not obvious for low-frequency noise noise reduction.
Summary of the invention
In order to solve the problems of the technologies described above one of at least, one object of the present invention is to provide a kind of denoising device that effectively can reduce the pneumatic and mechanical oscillation noise that range hood inside produces.
Another object of the present invention is to provide a kind of range hood comprising above-mentioned denoising device.
To achieve these goals, the embodiment of first aspect present invention provides a kind of denoising device, for range hood, comprise: noise reduction shroud, before described noise reduction shroud is arranged on the spiral case of described range hood, and be positioned at the top of the air inlet of described spiral case, and described noise reduction shroud is provided with filtering hole, the noise produced when running for reducing described range hood.
The denoising device that the embodiment of first aspect present invention provides, by arranging filtering hole on noise reduction shroud, the noise produced when range hood is run can enter in noise reduction shroud by filtering hole, then the frequency spectrum of noise can shift to high frequency or hyperfrequency because aperture is eliminated the noise when wave hole after filtration, thus the audible sound composition significantly reduced in noise spectrum, namely the noise produced due to pneumatic and mechanical oscillation when range hood runs is effectively reduced, thus the interference reduced human body and injury, and then improve Consumer's Experience, add the competitiveness of product in market; In addition, before denoising device is arranged on the spiral case of range hood, and above the air inlet being positioned at spiral case, the air inlet of spiral case can not thus be blocked, on the air performance of range hood almost without impact.
Specifically, the noise that existing range hood produces when usually adopting filling porous sound-absorbing material to reduce operation, but sound-absorbing porous material is good to medium-high frequency acoustically effective, poor to effect of low-frequency sound absorption, the noise of the pneumatic of range hood inside and mechanical oscillation generation thus effectively can not be reduced; And denoising device provided by the invention, then by arranging filtering hole on noise reduction shroud, the frequency spectrum of noise is shifted to high frequency or hyperfrequency by the principle utilizing aperture to eliminate the noise, thus the medium and low frequency composition effectively reduced in noise spectrum, thus the audible sound composition in noise is effectively reduced, the noise produced when range hood is run reduces greatly, thus improves Consumer's Experience, adds the competitiveness of product in market.Particularly, range hood operationally, due to gas flowing and mechanical oscillation, the noise of different frequency can be produced, these noises can through denoising device when propagating, and enter noise reduction shroud by the filtering hole on noise reduction shroud, then the noise of these different frequencies is when wave hole after filtration, according to the principle of aperture noise reduction, the frequency spectrum of noise will shift to high frequency or hyperfrequency, medium and low frequency composition in frequency spectrum is significantly reduced, namely audible sound composition obviously reduces, thus it is inner because of noise that is pneumatic and mechanical oscillation generation to effectively reduce range hood, improve Consumer's Experience, add the competitiveness of product in market.
Be understandable that, aperture noise elimination can effectively control air power noise and propagate outward, there is Low Medium Frequency broadband acoustic attenuation performance, and extinction coefficient can be improved in little aperture, low porosity can increase the width of sound sucting band, and the orifice plate degree of depth can change the position at resonance sound-absorbing peak, therefore, in actual production, the thickness of the size in filtering hole, density and noise reduction shroud should be designed as the case may be with product requirement.
In addition, the denoising device in above-described embodiment provided by the invention can also have following additional technical feature:
In technique scheme, described noise reduction shroud comprises: gusset plate, and described gusset plate surrounds the container cavity of both ends open; And base plate, described base plate is fixedly connected with the bottom of described gusset plate, and closes the bottom port of described container cavity, wherein, described base plate offers described filtering hole.
In above-mentioned arbitrary technical scheme, described gusset plate offers described filtering hole on the plate body of described spiral case.
Noise reduction shroud comprises gusset plate and base plate, and most of noise can enter noise reduction shroud by base plate, therefore on base plate, arranges filtering hole, effectively can reduce the noise produced when range hood runs; Further, on the plate body of spiral case, filtering hole is also offered at gusset plate, when the small part noise then spread out of in spiral case arrives this part plate body of noise reduction shroud, also noise reduction shroud can be entered through filtering hole, thus the audible sound composition reduced in this partial noise, the noise produced when range hood is run reduces further, to improve the noise reduction of denoising device further, promotes Consumer's Experience further.
In above-mentioned arbitrary technical scheme, described denoising device also comprises: sound-absorbing part, and described sound-absorbing part is arranged in described container cavity.
By filling sound-absorbing part in container cavity, when then the noise transmission of different frequency is to denoising device, owing to noise reduction shroud being evenly equipped with a large amount of filtering holes, according to the principle of aperture noise reduction, the frequency spectrum of noise can shift to high frequency or hyperfrequency, and the audible sound composition in frequency spectrum is obviously reduced; When noise enters the sound-absorbing part in noise reduction shroud through filtering hole, because sound-absorbing part is made up of sound-absorbing porous material, therefore a part of acoustic energy can rub and be converted into thermal energy consumption and dissipate in the hole of porous material, makes to be weakened further by the sound wave of sound-absorbing part; When noise by sound-absorbing part again enter propagate in air time, the change of propagation medium can consume a part of acoustic energy again; After the compound noise reduction of these three processes, the audible noise produced due to gas flowing and mechanical oscillation when range hood runs significantly reduces, thus significantly improves Consumer's Experience.As for the concrete material of sound-absorbing part, can be one or more in metallic fiber, centrifugally glass-wool, acoustical cotton or other porous materials.
In above-mentioned arbitrary technical scheme, between described sound-absorbing part and described base plate, be provided with gap.
Arrange between sound-absorbing part and base plate and there is gap, then can form a part of cavity between sound-absorbing part and base plate, noise is when entering this cavity through filtering hole, due to cavity resonance effect, also a part of acoustic energy can be consumed, thus further increase the noise reduction of denoising device, reduce further noise when range hood runs.Certainly, sound-absorbing part also can be set and be fitted on base plate, can noise reduction be played equally, therefore it will be understood by those of skill in the art that this technical scheme is also in protection scope of the present invention.
In above-mentioned arbitrary technical scheme, described base plate comprises two arcs, and two described arcs are connected, and makes described base plate entirety in M shape.
Back-plane design is become the M shape plate body that two arcs connect, when then air-flow is flushed on the arc face of the M shape base plate of denoising device, arc face can be played drainage and be slowed down the effect of gas shock, and then reduce the aerodynamic noise of gas shock generation, thus improve the noise reduction of denoising device further; In addition, M shape base plate also can promote the flow efficiency of air-flow simultaneously, and then improves the fume-exhausting efficiency of range hood.Further, sound-absorbing part is also designed to M shape, with consistent with the form trait of base plate, is convenient to the installation of sound-absorbing part.
In above-mentioned arbitrary technical scheme, described filtering hole is circular hole, and the diameter of described circular hole is 1 ~ 10mm.
Filtering hole is designed to circular hole, and the diameter control of circular hole is in the scope of 1 ~ 10mm, the noise produced when can ensure that filtering hole is run range hood plays effective aperture sound deadening, the frequency spectrum of the different frequency noise produced during to be run by range hood shifts to high frequency or superelevation frequency spectrum, and the audible sound composition in frequency spectrum is obviously reduced.Preferably, the diameter of circular hole is 3 ~ 8mm.Certainly; those skilled in the art is to be understood that; filtering hole also can adopt other shapes; as triangle, rhombus etc.; will not enumerate at this, as long as its size Control is in certain scope, all can play the effect of aperture noise reduction; all can realize object of the present invention, therefore all in protection scope of the present invention.
The embodiment of second aspect present invention provides a kind of range hood, comprising: frame, and described frame comprises top board and header board; Spiral case, described spiral case is arranged in described frame, and is positioned at described header board rear, and described spiral case has air inlet; Impeller, described impeller is arranged in described spiral case; With the denoising device such as according to any one of first aspect embodiment, described denoising device is arranged between described header board and described spiral case, and described denoising device is fixed on described header board, and is positioned at above described air inlet.
The range hood that the embodiment of second aspect present invention provides, because being provided with the denoising device according to any one of first aspect embodiment, thus the noise operationally produced due to gas flowing and mechanical oscillation obviously reduces, thus improve Consumer's Experience, add the competitiveness of product in market.Particularly, this denoising device is arranged between frame header board and spiral case, before being namely arranged on spiral case, and is positioned at above spiral case air inlet, thus can not blocks air inlet, on the air circulation of range hood inside almost without impact; When range hood inner blower runs due to the noise of gas flowing and mechanical oscillation generation, be filtered absorption by Middle and low frequency noise wherein after denoising device, the audible sound composition in frequency spectrum is obviously reduced, thus the interference reduced human body and injury; The back-plane design of this noise reduction shroud becomes M shape simultaneously, has drainage, slows down the effect of gas shock and lifting air current flow efficiency to air-flow.As for the concrete mounting means of denoising device, for being spirally connected, riveting or arrange the modes such as support connection, the effect of fixing denoising device all can be played, all in protection scope of the present invention.
In addition, the range hood in above-described embodiment provided by the invention can also have following additional technical feature:
In technique scheme, top and the described top board of the noise reduction shroud of described denoising device fit, and the distance between the sound-absorbing part of described denoising device and described top board is 15 ~ 30mm.
The lower surface on the top and frame top board that arrange the noise reduction shroud of denoising device fits, and the distance controlling between the sound-absorbing part of denoising device and top board is in the scope of 15 ~ 30mm, ensure that to there is gap between sound-absorbing part and top board on the one hand, thus noise can continue to propagate in air after by sound-absorbing part, to convert propagation medium, further sound energy consumption, promotes the comfort of user; On the other hand, under the prerequisite of not blocking air inlet, relatively can extend the height of noise reduction shroud, and then increase the quantity in filtering hole and the thickness of sound-absorbing part, to improve the noise reduction of denoising device further.
In above-mentioned arbitrary technical scheme, the base plate of the noise reduction shroud of described denoising device comprises two asymmetric arcs, two described arcs are connected, make described base plate entirety in M shape, wherein, the intersection of two described arcs and the axis parallel of described impeller, and top board described in the plane orthogonal at the place, axis of described intersection and described impeller.
The back-plane design of noise reduction shroud is become the M shape that two arcs connect, then air-flow is when impacting the base plate of denoising device, base plate can play effective drainage, air-flow is avoided to form whirlpool stagnation, make flue gas enter air inlet fast to discharge, thus improve the smoke absorption effect of range hood; Meanwhile, the effect of buffer gas flow impact can be played in the arc face of M shape base plate, and then reduces the aerodynamic noise of gas shock generation, reduce further the noise produced when range hood runs; Further, due to the restriction of the shape of spiral case own, its air inlet generally can not be positioned at the middle of frame, so it is asymmetric to arrange two arcs, and the intersection of two arcs and the axis parallel of impeller, and the plane orthogonal top board at both places, namely the intersection of two arcs and the axis of impeller are positioned at same perpendicular, the drainage of noise reduction shroud can be made like this to reach optimization with the effect slowing down gas shock, and then noise when range hood is run reduce further.Certainly; two arcs also can be designed as symmetrical; or be designed to asymmetrical; but the intersection of two arcs and the axis of impeller are not be positioned at same perpendicular; also object of the present invention be can realize, also design philosophy of the present invention and aim do not departed from, therefore; it will be understood by those of skill in the art that these technical schemes are also in protection scope of the present invention.
Additional aspect of the present invention and advantage become obvious by description part below, or are recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the decomposition texture schematic diagram of the range hood according to one embodiment of the invention;
Fig. 2 is the main TV structure schematic diagram of range hood shown in Fig. 1 (removing Decorative Cover and header board);
Fig. 3 is the sectional structure schematic diagram of range hood shown in Fig. 1;
Fig. 4 is the partial structurtes schematic diagram of range hood shown in Fig. 1.
Wherein, the corresponding relation in Fig. 1 to Fig. 4 between Reference numeral and component names is:
1 range hood, 10 denoising devices, 11 noise reduction shrouds, 111 gusset plates, 112 base plates, 113 filtering holes, 12 sound-absorbing parts, 20 frames, 21 top boards, 22 header boards, 30 spiral cases, 40 impellers, 50 Decorative Cover, 60 check-valves;
Wherein, in figure, arrow represents the direction of propagation of noise.
Detailed description of the invention
In order to more clearly understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Set forth a lot of detail in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not by the restriction of following public specific embodiment.
Referring to Fig. 1 to Fig. 4, denoising device described according to some embodiments of the invention and range hood are described.
As shown in Figures 1 to 4, the denoising device 10 that the embodiment of first aspect present invention provides, for range hood 1, comprising: noise reduction shroud 11.
Particularly, before noise reduction shroud 11 is arranged on the spiral case 30 of range hood 1, and be positioned at the top of the air inlet of spiral case 30, and noise reduction shroud 11 is provided with filtering hole 113, the noise produced when running for reducing range hood 1.
The denoising device 10 that the embodiment of first aspect present invention provides, by arranging filtering hole 113 on noise reduction shroud 11, the frequency spectrum of noise is shifted to high frequency or hyperfrequency by the principle utilizing aperture to eliminate the noise, thus the medium and low frequency composition effectively reduced in noise spectrum, thus the audible sound composition in noise is effectively reduced, the noise produced when range hood 1 is run reduces greatly, thus improves Consumer's Experience, adds the competitiveness of product in market.Particularly, range hood 1 operationally, due to gas flowing and mechanical oscillation, the noise of different frequency can be produced, these noises can through denoising device 10 when propagating, and enter noise reduction shroud 11 by the filtering hole 113 on noise reduction shroud 11, then the noise of these different frequencies is when wave hole 113 after filtration, according to the principle of aperture noise reduction, the frequency spectrum of noise will shift to high frequency or hyperfrequency, medium and low frequency composition in frequency spectrum is significantly reduced, namely audible sound composition obviously reduces, thus effectively reduce range hood 1 inside because of noise that is pneumatic and mechanical oscillation generation, improve Consumer's Experience, add the competitiveness of product in market.
Be understandable that, aperture noise elimination can effectively control air power noise and propagate outward, there is Low Medium Frequency broadband acoustic attenuation performance, and extinction coefficient can be improved in little aperture, low porosity can increase the width of sound sucting band, and the orifice plate degree of depth can change the position at resonance sound-absorbing peak, therefore, in actual production, the thickness of the size in filtering hole 113, density and noise reduction shroud 11 should be designed as the case may be with product requirement.
In one embodiment of the invention, as shown in Figures 1 to 4, noise reduction shroud 11 comprises: gusset plate 111 and base plate 112.
Particularly, gusset plate 111 surrounds the container cavity of both ends open; Base plate 112 is fixedly connected with the bottom of gusset plate 111, and closes the bottom port of container cavity, wherein, base plate 112 offers filtering hole 113.
Preferably, as shown in Figure 1, gusset plate 111 offers filtering hole 113 on the plate body of spiral case 30.
In this embodiment, noise reduction shroud 11 comprises gusset plate 111 and base plate 112, and most of noise can enter noise reduction shroud 11 by base plate 112, therefore on base plate 112, arranges filtering hole 113, effectively can reduce the noise produced when range hood 1 runs; Further, the plate body of gusset plate 111 towards spiral case 30 also offers filtering hole 113, when the small part noise then spread out of in spiral case 30 arrives this part plate body of noise reduction shroud 11, also noise reduction shroud 11 can be entered through filtering hole 113, thus the audible sound composition reduced in this partial noise, the noise produced when range hood 1 is run reduces further, to improve the noise reduction of denoising device 10 further, promotes Consumer's Experience further.
In one embodiment of the invention, as shown in Figure 1, denoising device 10 also comprises: sound-absorbing part 12, and sound-absorbing part 12 is arranged in container cavity.
In this embodiment, by filling sound-absorbing part 12 in container cavity, when then the noise transmission of different frequency is to denoising device 10, owing to noise reduction shroud 11 being evenly equipped with a large amount of filtering holes 113, according to the principle of aperture noise reduction, the frequency spectrum of noise can shift to high frequency or hyperfrequency, and the audible sound composition in frequency spectrum is obviously reduced; When noise enters the sound-absorbing part 12 in noise reduction shroud 11 through filtering hole 113, because sound-absorbing part 12 is made up of sound-absorbing porous material, therefore a part of acoustic energy can rub and be converted into thermal energy consumption and dissipate in the hole of porous material, makes to be weakened further by the sound wave of sound-absorbing part 12; When noise by sound-absorbing part 12 again enter propagate in air time, the change of propagation medium can consume a part of acoustic energy again; After the compound noise reduction of these three processes, the audible noise produced due to gas flowing and mechanical oscillation when range hood 1 runs significantly reduces, thus significantly improves Consumer's Experience.
As for the concrete material of sound-absorbing part 12, can be one or more in metallic fiber, centrifugally glass-wool, acoustical cotton or other porous materials.
Preferably, gap is provided with between sound-absorbing part 12 and base plate 112.
In this embodiment, arrange between sound-absorbing part 12 and base plate 112 and there is gap, then can form a part of cavity between sound-absorbing part 12 and base plate 112, noise is when entering this cavity through filtering hole 113, due to cavity resonance effect, also can consume a part of acoustic energy, thus further increase the noise reduction of denoising device 10, reduce further noise when range hood 1 runs.
Certainly, sound-absorbing part 12 also can be set and be fitted on base plate 112, can noise reduction be played equally, therefore it will be understood by those of skill in the art that this technical scheme is also in protection scope of the present invention.
In one embodiment of the invention, as shown in Figure 1, Figure 2 and Figure 4, base plate 112 comprises two arcs, and two arcs are connected, and makes base plate 112 entirety in M shape.
In this embodiment, base plate 112 is designed to the M shape plate body that two arcs connect, when then air-flow is flushed on the arc face of the M shape base plate 112 of denoising device 10, arc face can be played drainage and be slowed down the effect of gas shock, and then reduce the aerodynamic noise of gas shock generation, thus improve the noise reduction of denoising device 10 further; In addition, M shape base plate 112 also can promote the flow efficiency of air-flow simultaneously, and then improves the fume-exhausting efficiency of range hood 1.
Further, sound-absorbing part 12 is also designed to M shape, with consistent with the form trait of base plate 112, is convenient to the installation of sound-absorbing part 12.
In any of the embodiments of the present invention, filtering hole 113 is circular hole, and the diameter of circular hole is 1 ~ 10mm.
In the above-described embodiments, filtering hole 113 is designed to circular hole, and the diameter control of circular hole is in the scope of 1 ~ 10mm, the noise produced when can ensure that 113 pairs, filtering hole range hood 1 runs plays effective aperture sound deadening, the frequency spectrum of the different frequency noise produced during to be run by range hood 1 shifts to high frequency or superelevation frequency spectrum, and the audible sound composition in frequency spectrum is obviously reduced.
Preferably, the diameter of circular hole is 3 ~ 8mm.
Certainly; those skilled in the art is to be understood that; filtering hole 113 also can adopt other shapes; as triangle, rhombus etc.; will not enumerate at this, as long as its size Control is in certain scope, all can play the effect of aperture noise reduction; all can realize object of the present invention, therefore all in protection scope of the present invention.
As shown in Figures 1 to 4, the range hood 1 that the embodiment of second aspect present invention provides, comprising: frame 20, spiral case 30, impeller 40 and the denoising device any one of first aspect embodiment 10.
Particularly, frame 20 comprises top board 21 and header board 22; Spiral case 30 is arranged in frame 20, and is positioned at header board 22 rear, and spiral case 30 has air inlet; Impeller 40 is arranged in spiral case 30; Denoising device 10 is arranged between header board 22 and spiral case 30, and denoising device 10 is fixed on header board 22, and is positioned at above air inlet; Top board 21 is also provided with check-valves 60, and check-valves 60 is connected with spiral case 30; Header board 22 is also provided with Decorative Cover 50 above.
The range hood 1 that the embodiment of second aspect present invention provides, because being provided with the denoising device 10 any one of first aspect embodiment, thus the noise operationally produced due to gas flowing and mechanical oscillation obviously reduces, thus improves Consumer's Experience, adds the competitiveness of product in market.Particularly, this denoising device 10 is arranged between frame 20 header board 22 and spiral case 30, before being namely arranged on spiral case 30, and is positioned at above spiral case 30 air inlet, thus can not blocks air inlet, on the air circulation of range hood 1 inside almost without impact; When range hood 1 inner blower runs due to the noise of gas flowing and mechanical oscillation generation, be filtered absorption by Middle and low frequency noise wherein after denoising device 10, the audible sound composition in frequency spectrum is obviously reduced, thus the interference reduced human body and injury; The base plate 112 of this noise reduction shroud 11 is designed to M shape simultaneously, has drainage, slows down the effect of gas shock and lifting air current flow efficiency to air-flow.
As for the concrete mounting means of denoising device 10, for being spirally connected, riveting or arrange the modes such as support connection, the effect of fixing denoising device 10 all can be played, all in protection scope of the present invention.
Preferably, as shown in Figures 2 to 4, top and the top board 21 of the noise reduction shroud 11 of denoising device 10 fit, and the distance between the sound-absorbing part 12 of denoising device 10 and top board 21 is 15 ~ 30mm.
In this embodiment, the lower surface on the top and frame 20 top board 21 that arrange the noise reduction shroud 11 of denoising device 10 fits, and the distance controlling between the sound-absorbing part 12 of denoising device 10 and top board 21 is in the scope of 15 ~ 30mm, ensure that to there is gap between sound-absorbing part 12 and top board 21 on the one hand, thus noise can continue to propagate in air after by sound-absorbing part 12, to convert propagation medium, further sound energy consumption, promotes the comfort of user; On the other hand, under the prerequisite of not blocking air inlet, relatively can extend the height of noise reduction shroud 11, and then increase the quantity in filtering hole 113 and the thickness of sound-absorbing part 12, to improve the noise reduction of denoising device 10 further.
In one embodiment of the invention, as shown in Figure 1, Figure 2 and Figure 4, the base plate 112 of the noise reduction shroud 11 of denoising device 10 comprises two asymmetric arcs, two arcs are connected, make base plate 112 entirety in M shape, wherein, the intersection of two arcs and the axis parallel of impeller 40, and the plane orthogonal top board 21 at the place, axis of intersection and impeller 40.
In this embodiment, the base plate 112 of noise reduction shroud 11 is designed to the M shape that two arcs connect, then air-flow is when impacting the base plate 112 of denoising device 10, base plate 112 can play effective drainage, air-flow is avoided to form whirlpool stagnation, make flue gas enter air inlet fast to discharge, thus improve the smoke absorption effect of range hood 1; Meanwhile, the effect of buffer gas flow impact can be played in the arc face of M shape base plate 112, and then reduces the aerodynamic noise of gas shock generation, reduce further the noise produced when range hood 1 runs.
Further, due to the restriction of the shape of spiral case 30 own, its air inlet generally can not be positioned at the middle of frame 20, so it is asymmetric to arrange two arcs, and the axis parallel of the intersection of two arcs and impeller 40, and the plane orthogonal top board 21 at both places, namely the intersection of two arcs and the axis of impeller 40 are positioned at same perpendicular, the drainage of noise reduction shroud 11 can be made like this to reach optimization with the effect slowing down gas shock, and then noise when range hood 1 is run reduce further.
Certainly; two arcs also can be designed as symmetrical; or be designed to asymmetrical; but the axis of the intersection of two arcs and impeller 40 is not be positioned at same perpendicular; also object of the present invention be can realize, also design philosophy of the present invention and aim do not departed from, therefore; it will be understood by those of skill in the art that these technical schemes are also in protection scope of the present invention.
In sum, denoising device provided by the invention, by arranging filtering hole on noise reduction shroud, the noise produced when range hood is run can enter in noise reduction shroud by filtering hole, then the frequency spectrum of noise can shift to high frequency or hyperfrequency because aperture is eliminated the noise when wave hole after filtration, thus the audible sound composition significantly reduced in noise spectrum, namely the noise produced due to pneumatic and mechanical oscillation when range hood runs is effectively reduced, thus the interference reduced human body and injury, and then improve Consumer's Experience, add the competitiveness of product in market; In addition, before denoising device is arranged on the spiral case of range hood, and above the air inlet being positioned at spiral case, the air inlet of spiral case can not thus be blocked, on the air performance of range hood almost without impact.
Specifically, the noise that existing range hood produces when usually adopting filling porous sound-absorbing material to reduce operation, but sound-absorbing porous material is good to medium-high frequency acoustically effective, poor to effect of low-frequency sound absorption, the noise of the pneumatic of range hood inside and mechanical oscillation generation thus effectively can not be reduced; And denoising device provided by the invention, then by arranging filtering hole on noise reduction shroud, the frequency spectrum of noise is shifted to high frequency or hyperfrequency by the principle utilizing aperture to eliminate the noise, thus the medium and low frequency composition effectively reduced in noise spectrum, thus the audible sound composition in noise is effectively reduced, the noise produced when range hood is run reduces greatly, thus improves Consumer's Experience, adds the competitiveness of product in market.Particularly, range hood operationally, due to gas flowing and mechanical oscillation, the noise of different frequency can be produced, these noises can through denoising device when propagating, and enter noise reduction shroud by the filtering hole on noise reduction shroud, then the noise of these different frequencies is when wave hole after filtration, according to the principle of aperture noise reduction, the frequency spectrum of noise will shift to high frequency or hyperfrequency, medium and low frequency composition in frequency spectrum is significantly reduced, namely audible sound composition obviously reduces, thus it is inner because of noise that is pneumatic and mechanical oscillation generation to effectively reduce range hood, improve Consumer's Experience, add the competitiveness of product in market.
In the present invention, term " first ", " second " object only for describing, and instruction or hint relative importance can not be interpreted as; Term " multiple " then refers to two or more, unless otherwise clear and definite restriction.The term such as term " installation ", " being connected ", " connection ", " fixing " all should be interpreted broadly, and such as, " connection " can be fixedly connected with, and also can be removably connect, or connects integratedly; " being connected " can be directly be connected, and also indirectly can be connected by intermediary.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In description of the invention, it will be appreciated that, term " on ", the orientation of the instruction such as D score, "front", "rear" or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or unit must have specific direction, with specific azimuth configuration and operation, therefore, limitation of the present invention can not be interpreted as.
In the description of this description, specific features, structure, material or feature that the description of term " embodiment ", " some embodiments ", " specific embodiment " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a denoising device, for range hood, is characterized in that, comprising:
Noise reduction shroud, before described noise reduction shroud is arranged on the spiral case of described range hood, and is positioned at the top of the air inlet of described spiral case, and described noise reduction shroud is provided with filtering hole, the noise produced when running for reducing described range hood.
2. denoising device according to claim 1, is characterized in that,
Described noise reduction shroud comprises:
Gusset plate, described gusset plate surrounds the container cavity of both ends open; With
Base plate, described base plate is fixedly connected with the bottom of described gusset plate, and closes the bottom port of described container cavity, wherein, described base plate offers described filtering hole.
3. denoising device according to claim 2, is characterized in that,
Described gusset plate offers described filtering hole on the plate body of described spiral case.
4. denoising device according to claim 2, is characterized in that, also comprises:
Sound-absorbing part, described sound-absorbing part is arranged in described container cavity.
5. denoising device according to claim 4, is characterized in that,
Gap is provided with between described sound-absorbing part and described base plate.
6. the denoising device according to any one of claim 2 to 5, is characterized in that,
Described base plate comprises two arcs, and two described arcs are connected, and makes described base plate entirety in M shape.
7. denoising device according to claim 6, is characterized in that,
Described filtering hole is circular hole, and the diameter of described circular hole is 1 ~ 10mm.
8. a range hood, is characterized in that, comprising:
Frame, described frame comprises top board and header board;
Spiral case, described spiral case is arranged in described frame, and is positioned at described header board rear, and described spiral case has air inlet;
Impeller, described impeller is arranged in described spiral case; With
Denoising device according to any one of claim 1 to 7, described denoising device is arranged between described header board and described spiral case, and described denoising device is fixed on described header board, and is positioned at above described air inlet.
9. range hood according to claim 8, is characterized in that,
Top and the described top board of the noise reduction shroud of described denoising device fit, and the distance between the sound-absorbing part of described denoising device and described top board is 15 ~ 30mm.
10. range hood according to claim 8, is characterized in that,
The base plate of the noise reduction shroud of described denoising device comprises two asymmetric arcs, two described arcs are connected, make described base plate entirety in M shape, wherein, the intersection of two described arcs and the axis parallel of described impeller, and top board described in the plane orthogonal at the place, axis of described intersection and described impeller.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610092095.3A CN105509119B (en) | 2016-02-18 | 2016-02-18 | Denoising device and range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610092095.3A CN105509119B (en) | 2016-02-18 | 2016-02-18 | Denoising device and range hood |
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| CN105509119A true CN105509119A (en) | 2016-04-20 |
| CN105509119B CN105509119B (en) | 2017-10-31 |
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| CN201610092095.3A Active CN105509119B (en) | 2016-02-18 | 2016-02-18 | Denoising device and range hood |
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