• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    According to the invention, a sound attenuation device is provided for mounting in a through-opening in a window frame or in another opening through a partition surface. The device comprises a plurality of air ducts extending along the entire or substantially entire depth of the sound attenuation device, which air ducts are separated by sound-absorbing elements which are fixed relative to each other. A first end of each of at least two of the sound absorbing elements has a different width than the respective other end. The at least two sound-absorbing elements of the sound-absorbing elements are alternately arranged so that each of the sound-absorbing elements tapers in the deep direction of the sound-absorbing device, and the remaining sound-absorbing elements expand in the deep direction, so that at least one of the air ducts is angled relative to the sound channels. 2)
    公开号:SE1451077A1
    申请号:SE1451077
    申请日:2014-09-15
    公开日:2016-03-16
    发明作者:Lennart Karlén；Hans Castwall
    申请人:Casamja Ab；
    IPC主号:
    专利说明:

    SOUND STEAMING DEVICETechnical areaThe invention relates to the field of sound damping device for mounting in a through-opening in a window frame, cradle or the like.
    Technical backgroundTo provide supply air to a room in a dwelling or the like, valves mounted on, in or next to a window frame can be used. Such valves are usually elongate and control the flow through one or more through openings in the window frame or in an adjacent partition surface, which openings may be in the form of a gap or a plurality of slides.
    In order to reduce noise from such a supply air solution, it is advisable to mount silencers in the one or more through-openings described above. Several manufacturers today provide silencers intended to be mounted in a slit-shaped opening.
    SE 522703 presents such a sound-absorbing construction which comprises a sound-absorbing material which has a number of slides which extend through the material and are surrounded by material of a certain thickness. A disadvantage of this solution is that it does not always fit in applications that require a very low construction height.
    An alternative solution is designed with two parallel platform elements, e.g. plates, between which a plurality of spacer elements are arranged in parallel and at a distance from each other. The distance between the spacer elements forms channels, ie. a plurality of parallel channels are separated by the spacer element. A disadvantage of this solution is that in noisy environments they can give an insufficient sound damping, ie. the noise-vaporizing shape is limited.2SummaryAn object of the present invention is to provide a sound damping device with improved sound damping, which preferably simultaneously has a laid river resistance, and preferably also can be designed with a low construction height.
    This and other objects are achieved according to the present invention with a sound damping device according to the independent claim. Preferred embodiments are defined in the dependent claims.
    According to the invention, a sound damping device is provided for mounting in a through-opening in a window frame or in another opening through a partition surface. The device comprises a plurality of air ducts which extend along the entire or substantially entire depth of the sound damping device, which air ducts are separated by sound-absorbing elements which are fixed relative to each other. A first fifth of each of at least two of the sound absorbing elements has a different width than the second second, respectively. The at least two sound-absorbing elements of the sound-absorbing elements are arranged alternately so that each of these at least two sound-absorbing elements tapers in the deep direction of the sound-damping device, and the remainder of these at least two sound-absorbing elements are extended in the deep direction at least one angle. relative to the depth direction of the sound damping device.
    Alternatively, the latter may be described as a first and a second subset of said sound absorbing elements being arranged alternately (i.e. arranged after or next to each other where each second element belongs to the first subset and the second elements belong to the second subset), wherein said first subset of elements are arranged so that they taper in the depth direction of the sound absorber, and said second subset of elements are arranged so that they expand in said depth direction, thus making said air ducts angled relative to the depth direction of the sound adapter.
    The invention is based on the insight that channels which are angled relative to the depth direction or incoming flow direction of the sounder provide improved sound damping. The invention is further based on the realization that the impedance difference3which arises between two adjacent sound-absorbing elements of different widths is advantageous with respect to sound evaporation in a varied wide frequency range.
    It will be appreciated that the deep direction of the muffler or muffler refers to a perpendicular direction to the window frame or partition through which the muffler is intended to be mounted, or in other words a direction perpendicular to the front and back of the muffler, i.e. its inlet side and outlet side, or in other words a direction parallel to the main flow direction in and / or out of the sound damping device.
    According to an embodiment of the invention, said first spirits and / or said second spirits have rounded corners with a radius of at least 2 mm. This is advantageous because it provides a lower flow resistance through the muffler.
    In accordance with another embodiment of the invention, said at least one of the air ducts which is angled has a cross-sectional area which increases in the deep direction of the sound vaporizing device or in the direction of flow through the duct. This is advantageous because it provides a lower throttle resistance through the muffler.
    In accordance with yet another embodiment of the invention, the side surfaces of said at least two sound absorbing elements defining or defining said at least one of said air ducts are planar. According to yet another embodiment, at least one of the side surfaces has the at least two sound absorbing elements defining or defining the at least one of the air ducts completely or partially concave or convex. In other words, the at least one of the air ducts may have a non-constant cross-sectional area or width. In embodiments where at least one of the side surfaces of the at least two sound absorbing elements defining or defining the at least one of the air ducts is completely or partially concave, then the cross-sectional area or width may be maximum at a position between the inlet and outlet of the sound vaporizer. This can also be described as the at least one of the air ducts being provided with a cavity between the inlet and the outlet. This embodiment is advantageous because it4can give an increased sound generation in a specific frequency range, which frequency range depends on the selected geometry of the side surface or surfaces.
    According to yet another embodiment of the invention, at least one of the side surfaces of said at least two sound absorbing elements defining or defining said at least one of said air ducts is wholly or partly concave, and at least one second opposite side surface of said at least two sound absorbing elements is completely or partially convex, so that said at least one of said air ducts is curved or curved in its river direction or in other words has a curved or curved river direction. In other words, so are at least two side surfaces facing each other and defining said at least one of said air ducts formed so that one of the side surfaces is completely or partially concave and the other of the side surfaces is completely or partially convex. The shape or curvature of the side surface (s) which is wholly or partly concave may correspond to the shape or curvature of the side surface (s) which are wholly or partly convex, which means that the width of the air duct or ducts is constant or substantially constant. This embodiment is advantageous because it can provide further improved sound damping.
    According to yet another embodiment of the invention, at least one of the sound absorbing elements has a different density than at least another of the sound absorbing elements. According to yet another embodiment of the invention, the sound-absorbing elements which taper in the deep direction of the sound-damping device have a different density than the sound-absorbing elements which expand in the said deep direction. In other words, adjacent sound absorbing elements have different densities. Having sound-absorbing elements with different densities is advantageous because it provides additional possibility to control the sound damping to the specific type of noise (car traffic, train traffic, aircraft, etc.) that racers in the billion sound damping device are to be installed. In other words, in addition to adjusting the geometry of the sound damping elements (and thus, among other things, channel width, angle of the channels, widening of the channels), one can also adjust the density of each of the sound absorbing elements to optimize the sound damping. For example, it may be advantageous for low frequencies to havesound-absorbing elements with a relatively low density, while for high frequencies it may be advantageous to have a tatter material with a higher density.
    According to yet another embodiment of the invention, at least one of the sound absorbing elements has a non-constant or varying density, the density at a first spirit of the at least one of the sound absorbing elements differing from the density at its second spirit. This is advantageous because it provides additional degrees of freedom to control the sound damping to the specific type of noise (car traffic, train traffic, flights, etc.) that racers in the environment where the sound damping device is to be installed. In one embodiment, the density is higher at one spirit than at the other, wider, the spirit, and decreases gradually, for example linearly, in between. In this way, the wider spirit with low density gives good steaming at low frequencies and the narrower spirit with high density gives good steaming at high frequencies. In another embodiment the density varies laterally, for example the sound-damping elements can be designed so that one half has a density and the other half a different density, i.e. they are divided with respect to the density in the depth direction.
    According to yet another embodiment of the invention, the sound damping device comprises first and second platform-shaped elements arranged parallel and at a distance from each other, where the sound-absorbing elements are fixed between the platform-shaped elements. The sound-absorbing elements can also be platformed with a substantially rectangular cross-section. This provides select channels with a rectangular cross-section that is delimited up and down by the platform elements and laterally by two sound-absorbing elements. In yet another embodiment, the sound-absorbing elements can be described as being substantially triangular. In other words, the sound-absorbing elements have a substantially triangular cross-section seen from above.
    According to yet another embodiment of the invention, the sound damping device has a height in the range 5-500 mm, preferably a height less than 50 mm, or less than 15 mm.6Brief description of the drawingsThese and other aspects of the present invention will now be described in more detail with reference to the accompanying drawings, which show presently preferred embodiments of the invention, in which: Fig. 1 shows a known sound damping device,Fig. 2 shows a sound damping device according to a first embodiment of the invention,Fig. 3 shows a sound damping device according to a second embodiment of the invention,Fig. 4 shows a sound damping device according to a third embodiment of the invention, andFig. 5 shows a sound damping device according to a fourth embodiment of the invention.
    Detailed description of preferred embodimentsFigure 1 shows a perspective view of a part of a known sound damping device 1 with a first platform element 2 on which spacer elements 3a-e are arranged in parallel and at a distance from each other. Between the spacer elements 3a-e, parallel channels 4a-d are formed through which the incoming river F is distributed. The sound damping device also comprises a second platform element which is not shown in the figure. The second platform element is of the same type as the first platform element and is arranged parallel thereto on the spacer elements 3a-e so as to form an upper boundary of the channels 4a-d. The channels are thus defined by the two platform elements and the spacer elements. The spacer elements 3a-e are of a sound-absorbing material to give the desired sound-damping effect. The flat-shaped elements are designed in plastic, metal, cardboard or the like.
    Figure 2 shows a plan view of a part of a sound damping device 11 according to a first embodiment of the invention. Sound-absorbing elements 13a-e are spaced apart on a first platform element 12. Between the sound-absorbing elements 13a-e channels 14a-d are formed. The sound-absorbing elements have a rectangular cross-section seen in the deep direction Y of the sound-damping order, which means that the channels also have a rectangular cross-section.7The sound forming device also comprises a second platform element which is not shown in the figure. The second platform element is of the same type as the first platform element and is arranged parallel thereto on the sound-absorbing elements 13a-e so as to constitute an upper limitation of the channels 14a-d. A first spirit 13a1-el of each of the sound-absorbing elements has a smaller width than the second spirit 13a2-e2, and the sound-absorbing elements thus have substantially triangular cross-sections seen in a perpendicular direction relative to the first platform-shaped element 12. The sound-absorbing elements are arranged alternately so that every other element 13a, 13c, 13e tapers in the deep direction Y, and that the other elements 13b, 13d expand in the deep direction. This causes the channels 14a-d to be angled relative to the depth direction Y. In this embodiment, the elements 13a, 13c, 13e taper at the same angle as the elements 13b, 13d are widened, thus causing the channels 14a-d to have a constant width. The sound damping device has an elongated cross section, ie. has a considerable width and height. The first and other spirits of the sound-absorbing elements have rounded corners in the deep direction.
    Figure 3 shows a plan view of a part of a sound forming device 21 according to a second embodiment of the invention. Sound-absorbing elements 23a-e are arranged at a distance from each other on a first platform element 22. Channels 24a-d are formed between the sound-absorbing elements 23a-e. The sound damping device also comprises a second platform element which is not shown in the figure. The second platform element is of the same type as the first platform element and is arranged parallel to it with the sound-absorbing elements therebetween. This second embodiment differs from the first embodiment in that the channels 24a-d have a width or cross-sectional area which increases in the depth direction Y of the sound damping device. Sonn is shown in Fig. 3, so the channels have a width b1 at the inlet and a width b2 at the outlet, where b2 > b1. In this case, this increase in width or cross-sectional area is achieved by the elements 23a, 23c, 23e narrowing faster, i.e. with a larger angle, than what the elements 23b, 23d expand. In other words, the ratio between the widths of the second and first spirits of the elements 23a, 23c, 23e is greater than that of the elements 23b, 23d.8Figure 4 shows a plan view of a part of a sound forming device 31 according to a third embodiment of the invention. Sound-absorbing elements 33a-e are arranged at a distance from each other on a first platform element 32. Between the sound-absorbing elements 33a-e channels 34a-d are formed. The sound damping device also comprises a second platform element which is not shown in the figure. The second platform element is of the same type as the first platform element and is arranged parallel to it with the sound-absorbing elements therebetween. This third embodiment differs from the first embodiment in that the channels 34a-d have a non-constant width or cross-sectional area, where the width or cross-sectional area is maximum between the inlet and outlet of the sound-evaporating device. In the figure, the maximum width of b3 which is larger than the widths b1, b2 at the inlet and the outlet, respectively, corresponds. This can also be described as the channels 34a-d being provided with a cavity between the inlet and the outlet. This is achieved in that the sound-absorbing elements 33b, 33d which expand in the deep direction have side surfaces 33b3-b4, 33d3-d4 which are partially concave. As can be seen from the figure, these side surfaces delimit the channels 34a-d from a hall. In other embodiments, instead, one or more of the sound absorbing elements 33a, 33c, 33e which taper in the deep direction may have one or both side surfaces which are completely or partially concave. In still other embodiments, one, several or all of the sound absorbing elements may have one or more lateral surfaces which are wholly or partly concave or convex.
    Figure 5 shows a plan view of a part of a sound damping device 41 according to a fourth embodiment of the invention. Sound-absorbing elements 43a-e are arranged at a distance from each other on a first platform element 42. Between the sound-absorbing elements 43a-e channels 44a-d are formed. The sound damping device also comprises a second platform element which is not shown in the figure. The second platform element is of the same type as the first platform element and is arranged parallel to it with the sound-absorbing elements therebetween. This fourth embodiment differs from the third embodiment in that the channels are curved or curved, and have a substantially constant cross-sectional area and width. This is achieved in that the sound-absorbing elements 43b, 43d which expand in the deep direction have side surfaces 43b3-b4, 43d3-d4 which are partially concave, and that the sound-absorbing elements 43a, 43c, 43e which taper in the deep direction have side surfaces 43a4, 43c3-c4 , 43e3 which are partly convex with essentially the same9curvature as the partially concave side surfaces 33b3-b4, 43d3-d4. In still other embodiments, one, several or all of the sound-absorbing elements may have one or both side surfaces which are wholly or partly concave or convex.
    In the first, second, third and fourth embodiments described above, all sound-damping elements have the same and constant density. Other embodiments correspond to the first, second, third and fourth embodiments, but with the difference that the sound-damping elements 13a, 13c, 13e, 23a, 23c, 23e, 33a, 33c, 33e which taper in the deep direction of the sound-damping device have a different density than the sound-damping the elements 13b, 13d, 23b, 23d, 33b, 33d, which are expanded in the said deep direction, i.e. adjacent sound-absorbing elements have different densities. Still other embodiments correspond to some of the first, second and third embodiments, but with the difference that each of the sound absorbing elements has a varying density, where the density of a first spirit differs from the density of its second spirit. The sound-damping elements can also be designed so that they are divided in their longitudinal direction Y-direction, where one part has a density and the other a different density.
    The description above and the accompanying drawings are to be considered as a non-limiting example of the invention. Those skilled in the art will appreciate that a number of changes and modifications may be made within the scope of the invention, e.g. the sound damping device may comprise both straight and angled channels, and the sound absorbing elements in one and the same sound damping device may have different shapes and different densities between them. The channel cross-sections also do not have to be rectangular but can have an optional shape created by how the edges of the sound-damping elements are formed. Although the figures show horizontally arranged sound damping devices, it will be appreciated that the like yarns may be arranged vertically or with a different orientation. The scope of protection is defined by the appended claims.
    权利要求:
    Claims (12)
    [1]
    A sound damping device for mounting in a through-opening in a window frame or in another opening through a partition surface, which device comprises: a plurality of air ducts (14a-d; 24a-d; 34a-d; 44a-d) extending along the whole or substantially the whole of the sound-damping device, said air ducts being separated by sound-absorbing elements (13a-e; 23a-e; 33a-e; 43a-e) which are fixed relative to each other, characterized in that a first spirit (13a1-el) of each of at least two sound-absorbing elements has a different width from the respective second spirit (13a2-e2), and in that said at least two sound-absorbing elements are arranged alternately so that each of the sound-absorbing elements tapers in the deep direction (Y) of the sound-damping device, and remaining sound absorbing elements are expanded in said depth direction, thereby causing at least one of said air ducts to be angled relative to the depth direction of the sound damping device.
    [2]
    A sound damping device according to claim 1, wherein said first and second spirits have rounded horns with a radius of at least 2 mm.
    [3]
    A sound damping device according to claim 1 or 2, wherein said at least one of said angled air ducts has a cross-sectional area which increases in the deep direction of the sound damping device.
    [4]
    A sound damping device according to any one of the preceding claims, wherein the side surfaces of said at least two sound absorbing elements defining said at least one of said air ducts are flat.
    [5]
    A sound damping device according to any one of claims 1-3, wherein at least one of the side surfaces of said at least two sound absorbing elements defining said at least one of said air ducts is wholly or partly concave or convex.
    [6]
    A sound damping device according to any one of claims 1-3, wherein at least one of the side surfaces (33b3-b4, 33d3-d4) of said at least two sound absorbing elements defining said at least one of said air ducts is wholly or partly 11 concave and the cross-sectional area or width at said atnninstone one of said air ducts is maximal at a position nnellan the inlet and outlet of the sound vaporizing device.
    [7]
    A sound damping device according to any one of claims 1-3, wherein at least one of the side surfaces (43b3-b4, 43d3-d4) of said at least two sound-absorbing elements defining said at least one of said air ducts is completely or partially concave and at least one second opposite side surface (43a4, 43c3-c4, 43e3) of said at least two sound absorbing elements is completely or partially convex so that said at least one of said air ducts is curved or curved in its river direction.
    [8]
    A sound damping device according to any one of the preceding claims, wherein at least one of said sound absorbing elements has a different density than at least another of said sound absorbing elements.
    [9]
    A sound damping device according to any one of the preceding claims, wherein the sound absorbing elements which taper in the deep direction of the sound damping device have a different density than the sound absorbing elements which expand in the said deep direction.
    [10]
    A sound damping device according to any one of the preceding claims, wherein at least one of said sound absorbing elements has a non-constant density, the density at a first end of said element differing from the density at its second spirit.
    [11]
    A sound damping device according to any one of the preceding claims, further comprising first and second platform elements arranged parallel and spaced apart from each other, said sound absorbing elements being fixed to said platform elements.
    [12]
    A sound damping device according to any one of the preceding claims, wherein said at least two sound absorbing elements are substantially triangular in shape. with a height i with a width i with a depth i 1
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    同族专利:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    BE521580A|
    GB1329862A|1970-09-22|1973-09-12|Sound Attenuators Ltd|Acoustic attenuator|
    GB1344268A|1970-11-05|1974-01-16|Sound Attenuators Ltd|Sound attenuating unit|
    IT1118938B|1979-10-05|1986-03-03|Fiat Ricerche|VENTILATION SHUTTER INCLUDING A PLURALITY OF PROFILED BLINDS|
    SE522703C2|2000-12-04|2004-03-02|Asservo Ab|Sound-insulating construction comprises sound-absorbent material placed or incorporated in air or gas intake, has width or depth between 50 and 200 mm and length or diameter dependent upon rate of flow|
    JP2007536492A|2004-05-07|2007-12-13|サイレンスエアインターナショナルピーティーワイリミテッド|Ventilation device and frame system|
    ES1065300Y|2007-04-23|2007-10-16|Dir Air Oy|AIR FLOW REGULATOR|JP6574663B2|2015-09-30|2019-09-11|三機工業株式会社|Silent ventilation louver in the ceiling|
    US10260772B2|2016-02-24|2019-04-16|VAW Systems Ltd.|Duct mounted sound attenuating baffle with an internally suspended mass layer|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1451077A|SE541181C2|2014-09-15|2014-09-15|Sound attenuator for continuous opening in window sill or other partition surface|SE1451077A| SE541181C2|2014-09-15|2014-09-15|Sound attenuator for continuous opening in window sill or other partition surface|
    EP14187298.6A| EP3002405A3|2014-09-15|2014-10-01|Silencing arrangement|
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