Distributed noise reduction box

Abstract

The application provides a distributed noise reduction box. The distributed noise reduction box comprises an outer frame and a sound-absorbing group accommodated in the outer frame. The outer frame is provided with an air flow channel. A plurality of first sound-absorbing pieces are linearly arranged at the front end of the air flow channel, and a plurality of second sound-absorbing pieces are linearly arranged at the rear end of the air flow channel. The arrangement directions of the plurality of first sound-absorbing pieces and the plurality of second sound-absorbing pieces are both intersected with the extension direction of the air flow channel. Each first sound-absorbing piece comprises a plurality of first sound-absorbing cores. The plurality of first sound-absorbing cores are linearly arranged in a staggered manner along the extension direction of the air flow channel. The distance between each first sound-absorbing core of any first sound-absorbing piece and each first sound-absorbing core of any adjacent first sound-absorbing piece is greater than the maximum outer diameter of each first sound-absorbing core. Each second sound-absorbing piece comprises a plurality of second sound-absorbing cores. The plurality of second sound-absorbing cores are linearly and spacedly arranged along the extension direction of the air flow channel. The distributed noise reduction box has a large effective sound absorption area and good sound absorption effect on high, medium and low frequencies.

Description

Technical Field

[0001] This utility model relates to the field of noise reduction technology, and in particular to a distributed noise reduction box. Background Technology

[0002] Depending on the application scenario, silencers installed in airflow channels are classified into fan silencers, exhaust pipe silencers, and blower / induced draft fan silencers, etc. The structure of a silencer includes a box body and a silencer chamber installed inside the box body. For example, the utility model patent application with application number CN201720289085.9 discloses a distributed silencer in which multiple sound-absorbing components are arranged in a horizontal and vertical linear pattern inside the box body. The overall shape of the sound-absorbing components is cylindrical, which has a large effective sound absorption area and a good sound attenuation effect, but its sound attenuation effect for low frequencies is poor. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a distributed noise reduction box with a large effective sound absorption area and good noise reduction effect in high, medium and low frequencies.

[0004] The objective of this utility model is achieved through the following technical solution: A distributed noise reduction box includes an outer frame and a silencing assembly housed within the outer frame. The outer frame has an airflow channel. The silencing assembly includes a plurality of first silencing elements and a plurality of second silencing elements. The plurality of first silencing elements are linearly arranged at the front end of the airflow channel, and the plurality of second silencing elements are linearly arranged at the rear end of the airflow channel. The arrangement directions of the plurality of first silencing elements and the plurality of second silencing elements all intersect with the extension direction of the airflow channel. Each of the first mufflers includes a plurality of first muffler chambers, which are arranged linearly in a staggered manner along the extension direction of the airflow channel. The distance between each of the first muffler chambers of any first muffler and each of the first muffler chambers of any adjacent first muffler is greater than the maximum outer diameter of each of the first muffler chambers. Each of the second mufflers includes a plurality of second mufflers arranged linearly at intervals along the extension direction of the airflow channel.

[0005] In one embodiment, the arrangement direction of the plurality of first silencers is perpendicular to the extension direction of the airflow channel.

[0006] In one embodiment, the arrangement direction of the plurality of second silencers is perpendicular to the extension direction of the airflow channel.

[0007] In one embodiment, the cross-section of each of the first silencers is a teardrop-shaped cross-section, the aspect ratio of the teardrop-shaped cross-section of each of the first silencers is 1.8 to 3, and the teardrop-shaped cross-section of each of the first silencers is oriented with or against the airflow direction.

[0008] In one embodiment, the cross-section of each second silencing chamber is a teardrop-shaped cross-section, the aspect ratio of the teardrop-shaped cross-section of each second silencing chamber is 2 to 3, and the teardrop-shaped cross-section of each second silencing chamber is oriented with or against the airflow direction.

[0009] In one embodiment, the ratio of the number of first mufflers in each first muffler to the number of second mufflers in each second muffler is 1.5 to 2.

[0010] In one embodiment, the number of the first silencers is the same as the number of the second silencers, and the plurality of the first silencers and the plurality of the second silencers are arranged linearly at intervals along the extension direction of the airflow channel in a one-to-one correspondence.

[0011] In one embodiment, the first muffler of each first muffler that is close to the second muffler of the corresponding second muffler is arranged linearly at intervals with a plurality of second mufflers of the corresponding second muffler along the extension direction of the airflow channel.

[0012] In one embodiment, each of the first silencing shells and each of the second silencing shells extends in the same direction.

[0013] In one embodiment, the extending direction of each of the first silencers intersects the extending direction of the airflow channel.

[0014] In one embodiment, the extending direction of each of the second silencers intersects the extending direction of the airflow channel.

[0015] In one embodiment, each of the first muffler tubes is respectively snapped onto the opposite side walls of the outer frame at both ends.

[0016] In one embodiment, each of the second silencing chambers is respectively snapped onto the opposite side walls of the outer frame at both ends.

[0017] In one embodiment, each of the first silencing chambers includes a first silencing microporous cylinder and a first silencing filling cotton, the first silencing microporous cylinder being arranged around the first silencing filling cotton, and the two ends of the first silencing microporous cylinder being connected to the opposite side walls of the outer frame.

[0018] In one embodiment, each of the second silencing chambers includes a second silencing microporous cylinder and a second silencing filling cotton, the second silencing microporous cylinder being arranged around the second silencing filling cotton, and the two ends of the second silencing microporous cylinder being connected to the opposite side walls of the outer frame.

[0019] Compared with the prior art, the present invention has at least the following advantages: This invention relates to a distributed noise reduction box. Multiple first and second noise reduction components are arranged along the intersecting direction of the airflow channel at the airflow channel of the outer frame. Each first noise reduction component includes multiple first noise reduction chambers, and each second noise reduction component includes multiple second noise reduction chambers. This results in a large total surface area of ​​the first and second noise reduction chambers, meaning the distributed noise reduction box has a large sound absorption area, effectively improving noise reduction performance. Furthermore, the multiple first noise reduction chambers are arranged in a staggered linear arrangement along the airflow channel, while the multiple second noise reduction chambers are arranged linearly at intervals along the airflow channel. Specifically, the first noise reduction chambers in each first noise reduction component are arranged alternately left and right along the airflow channel. Through multiple reflections and interferences, the noise reduction effect for mid-to-low frequency noise is significantly enhanced. Meanwhile, the second noise reduction chambers in each second noise reduction component are arranged at intervals along the airflow channel, resulting in more uniform absorption of high-frequency noise and lower airflow-generated noise, significantly enhancing the noise reduction effect for high-frequency noise. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a distributed noise reduction box according to one embodiment of the present invention; Figure 2 for Figure 1 A cross-sectional view of the distributed noise reduction box shown; Figure 3 for Figure 1 A partial view of the distributed noise reduction box shown. Detailed Implementation

[0022] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] This application provides a distributed noise reduction box. The distributed noise reduction box includes an outer frame and a silencing assembly housed within the outer frame. The outer frame has an airflow channel. The silencing assembly includes multiple first silencing elements and multiple second silencing elements. The multiple first silencing elements are linearly arranged at the front end of the airflow channel, and the multiple second silencing elements are linearly arranged at the rear end of the airflow channel. The arrangement directions of the multiple first and second silencing elements intersect the extension direction of the airflow channel. Each first silencing element includes multiple first silencing cores, which are linearly staggered along the extension direction of the airflow channel. The distance between each first silencing core of any first silencing element and each first silencing core of any adjacent first silencing element is greater than the maximum outer diameter of each first silencing core. Each second silencing element includes multiple second silencing cores, which are linearly spaced along the extension direction of the airflow channel.

[0026] In the aforementioned distributed noise reduction box, multiple first and second silencing components are arranged at the airflow channel of the outer frame, intersecting along the extension direction of the airflow channel. Each first silencing component includes multiple first silencing cores, and each second silencing component includes multiple second silencing cores. This results in a large total surface area of ​​the first and second silencing cores, meaning the distributed noise reduction box has a large sound absorption area, effectively improving the noise reduction effect. Furthermore, the multiple first silencing cores are arranged in a staggered linear pattern along the extension direction of the airflow channel, while the multiple second silencing cores are arranged linearly at intervals along the extension direction of the airflow channel. In other words, the first silencing cores in each first silencing component are arranged in an alternating linear pattern along the extension direction of the airflow channel. Through multiple reflections and interferences, the noise reduction effect of mid-to-low frequency noise is significantly enhanced. Meanwhile, the second silencing cores in each second silencing component are arranged linearly at intervals along the extension direction of the airflow channel, resulting in more uniform absorption of high-frequency noise and lower airflow-generated noise, significantly enhancing the noise reduction effect of high-frequency noise.

[0027] It can be understood that if the airflow channel is a linear airflow channel, then multiple first mufflers are arranged in a staggered linear arrangement along the extension direction of the airflow channel. That is, if the extension direction of the airflow channel is set to longitudinal, then in one of the first mufflers, each first muffler is distributed laterally with the adjacent first muffler, and each first muffler is located on the same side of the two adjacent mufflers. In other words, the first mufflers in each first muffler are arranged in an alternating linear arrangement along the extension direction of the airflow channel.

[0028] To better understand the distributed noise reduction box of this application, the following further explanation is provided: Please refer to the following: Figures 1 to 3 One embodiment of the distributed noise reduction box 10 includes an outer frame 100 and a noise reduction assembly 200 housed within the outer frame 100. The outer frame 100 is provided with an airflow channel 101. The noise reduction assembly 200 includes a plurality of first noise reduction components 210 and a plurality of second noise reduction components 220. The plurality of first noise reduction components 210 are linearly arranged at the front end of the airflow channel 101, and the plurality of second noise reduction components 220 are linearly arranged at the rear end of the airflow channel 101. The arrangement directions of the plurality of first noise reduction components 210 and the plurality of second noise reduction components 220 intersect with the extension direction of the airflow channel 101. Each first noise reduction component 210 includes a plurality of first noise reduction cavities 211. The plurality of first noise reduction cavities 211 are linearly arranged in a staggered manner along the extension direction of the airflow channel 101. The distance between each first noise reduction cavity 211 of any first noise reduction component 210 and each first noise reduction cavity 211 of any adjacent first noise reduction component 210 is greater than the maximum outer diameter of each first noise reduction cavity 211. Each second muffler 220 includes a plurality of second mufflers 221, which are arranged linearly at intervals along the extension direction of the airflow channel 101.

[0029] The aforementioned distributed noise reduction box 10 has multiple first silencing components 210 and multiple second silencing components 220 arranged at the airflow channel 101 of the outer frame 100 in a direction where they intersect along the extension direction of the airflow channel 101. Each first silencing component 210 includes multiple first silencing cores 211, and each second silencing component 220 includes multiple second silencing cores 221. That is, the total surface area of ​​the first silencing cores 211 and the second silencing cores 221 is large, which means that the sound absorption area of ​​the distributed noise reduction box 10 is large, effectively improving the noise reduction effect. In addition, the multiple first silencing cores 211 are arranged along the airflow channel 101. The extension direction of the channel 101 is staggered and linearly arranged, and multiple second silencers 221 are linearly spaced along the extension direction of the airflow channel 101. That is, the first silencers 211 in each first silencer 210 are arranged alternately in a linear pattern along the extension direction of the airflow channel 101. Through multiple reflections and interferences, the noise reduction effect of low and medium frequency noise is significantly enhanced. The second silencers 221 in each second silencer 220 are arranged in a linear pattern along the extension direction of the airflow channel 101, which makes the absorption of high frequency noise more uniform and the airflow regeneration noise lower, thus significantly enhancing the noise reduction effect of high frequency noise.

[0030] Please refer to the following: Figures 1 to 3 In one embodiment, the arrangement direction of the plurality of first mufflers 210 is perpendicular to the extension direction of the airflow channel 101. Furthermore, the arrangement direction of the plurality of second mufflers 220 is perpendicular to the extension direction of the airflow channel 101, which reduces the obstruction to the airflow, that is, reduces the airflow resistance of the first mufflers 210 and the second mufflers 220, thereby reducing the generation of vortices.

[0031] Please refer to the following: Figures 1 to 3 In one embodiment, the cross-section of each first muffler 211 is a teardrop-shaped cross-section, with an aspect ratio of 1.8 to 3, and the teardrop-shaped cross-section of each first muffler 211 is oriented in the direction of either the airflow or the airflow direction. Furthermore, the cross-section of each second muffler 221 is also a teardrop-shaped cross-section, with an aspect ratio of 2 to 3, and the teardrop-shaped cross-section of each second muffler 221 is oriented in the direction of either the airflow or the airflow direction, further reducing airflow obstruction, i.e., further reducing the airflow resistance of the first muffler 210 and the second muffler 220, and thus further reducing the generation of vortices.

[0032] Please refer to the following: Figures 1 to 3In one embodiment, the ratio of the number of first silencing elements 211 in each first silencing element 210 to the number of second silencing elements 221 in each second silencing element 220 is 1.5 to 2, effectively ensuring effective noise reduction of low, mid, and high frequency noise. Furthermore, the number of first silencing elements 210 is the same as the number of second silencing elements 220, and the plurality of first silencing elements 210 and the plurality of second silencing elements 220 are arranged linearly at intervals along the extension direction of the airflow channel 101, corresponding one-to-one. Furthermore, in each first muffler 210, the first muffler 211 closest to the second muffler 220 of the corresponding second muffler 220 is arranged linearly and alternately with the plurality of second mufflers 221 of the corresponding second muffler 220 along the extension direction of the airflow channel 101. That is, the number of rows of the first muffler 210 and the second muffler 220 along the airflow channel 101 is the same, and the plurality of first mufflers 211 of any first muffler 210 and the plurality of second mufflers 221 of the corresponding second muffler 220 are arranged linearly along the extension direction of the airflow channel 101. However, the number of rows of the first mufflers 211 in the first muffler 210 and the second mufflers 221 in the second muffler 220 are different, which effectively ensures effective noise reduction of low, medium and high frequency noise.

[0033] Please refer to the following: Figures 1 to 3 In one embodiment, the extension directions of each first muffler 211 and each second muffler 221 are the same. Further, the extension direction of each first muffler 211 intersects the extension direction of the airflow channel 101. Further, the extension direction of each second muffler 221 intersects the extension direction of the airflow channel 101, that is, the length direction of each first muffler 211 and the length direction of each second muffler 221 are the same, effectively reducing the airflow resistance of the first muffler 210 and the second muffler 220, thereby further reducing the generation of vortices.

[0034] In one embodiment, the two ends of each first muffler are respectively snapped onto the opposite side walls of the outer frame. Furthermore, the two ends of each second muffler are respectively snapped onto the opposite side walls of the outer frame, thus better ensuring the installation stability of each first and second muffler at the outer frame.

[0035] Please refer to the following: Figures 1 to 3In one embodiment, each first silencing chamber 211 includes a first silencing microporous cylinder 2111 and a first silencing filling cotton 2112. The first silencing microporous cylinder 2111 is arranged around the first silencing filling cotton 2112, and the two ends of the first silencing microporous cylinder 2111 are connected to the opposite side walls of the outer frame 100. Further, each second silencing chamber 221 includes a second silencing microporous cylinder 2211 and a second silencing filling cotton 2212. The second silencing microporous cylinder 2211 is arranged around the second silencing filling cotton 2212, and the two ends of the second silencing microporous cylinder 2211 are connected to the opposite side walls of the outer frame 100, further ensuring the noise reduction effect of the distributed noise reduction box 10.

[0036] Compared with the prior art, the present invention has at least the following advantages: The distributed noise reduction box 10 of this utility model has multiple first silencing components 210 and multiple second silencing components 220 arranged in a direction intersecting the extension direction of the airflow channel 101 at the airflow channel 101 of the outer frame 100. Each first silencing component 210 includes multiple first silencing cores 211, and each second silencing component 220 includes multiple second silencing cores 221. That is, the total surface area of ​​the first silencing cores 211 and the second silencing cores 221 is large, which means that the sound absorption area of ​​the distributed noise reduction box 10 is large, effectively improving the noise reduction effect. In addition, the multiple first silencing cores 211 are arranged in a direction intersecting the extension direction of the airflow channel 101. The airflow channel 101 extends in a staggered linear arrangement, and multiple second silencing elements 221 are arranged linearly at intervals along the extension direction of the airflow channel 101. That is, the first silencing elements 211 in each first silencing component 210 are arranged alternately in a linear pattern along the extension direction of the airflow channel 101. Through multiple reflections and interferences, the noise reduction effect of low and medium frequency noise is significantly enhanced. The second silencing elements 221 in each second silencing component 220 are arranged linearly at intervals along the extension direction of the airflow channel 101, which makes the absorption of high frequency noise more uniform and the airflow regeneration noise lower, thus significantly enhancing the noise reduction effect of high frequency noise.

[0037] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A distributed noise reduction box, comprising an outer frame and a sound-absorbing assembly housed within the outer frame, wherein the outer frame is provided with an airflow channel, characterized in that, The silencing assembly includes multiple first silencing components and multiple second silencing components. The multiple first silencing components are linearly arranged at the front end of the airflow channel, and the multiple second silencing components are linearly arranged at the rear end of the airflow channel. The arrangement directions of the multiple first silencing components and the multiple second silencing components all intersect with the extension direction of the airflow channel. Each of the first mufflers includes a plurality of first muffler chambers, which are arranged linearly in a staggered manner along the extension direction of the airflow channel. The distance between each of the first muffler chambers of any first muffler and each of the first muffler chambers of any adjacent first muffler is greater than the maximum outer diameter of each of the first muffler chambers. Each of the second mufflers includes a plurality of second mufflers arranged linearly at intervals along the extension direction of the airflow channel.

2. The distributed noise reduction box according to claim 1, characterized in that, The arrangement direction of the plurality of first silencers is perpendicular to the extension direction of the airflow channel; and / or, The arrangement direction of the plurality of second silencers is perpendicular to the extension direction of the airflow channel.

3. The distributed noise reduction box according to claim 1, characterized in that, Each of the first silencers has a teardrop-shaped cross-section, the aspect ratio of the teardrop-shaped cross-section of each of the first silencers is 1.8 to 3, and the teardrop-shaped cross-section of each of the first silencers is oriented with or against the airflow direction; and / or, Each of the second silencers has a teardrop-shaped cross-section, and the aspect ratio of the teardrop-shaped cross-section of each of the second silencers is 2 to 3. The teardrop-shaped cross-section of each of the second silencers is oriented with or against the airflow direction.

4. The distributed noise reduction box according to claim 1, characterized in that, The ratio of the number of first mufflers in each first muffler to the number of second mufflers in each second muffler is 1.5 to 2.

5. The distributed noise reduction box according to claim 1, characterized in that, The number of the first silencers is the same as the number of the second silencers, and the plurality of the first silencers and the plurality of the second silencers are arranged linearly at intervals along the extension direction of the airflow channel, corresponding one-to-one.

6. The distributed noise reduction box according to claim 5, characterized in that, In each of the first mufflers, the first muffler closest to the second muffler of the corresponding second muffler is arranged linearly at intervals with the plurality of second mufflers of the corresponding second muffler along the extension direction of the airflow channel.

7. The distributed noise reduction box according to claim 1, characterized in that, The first and second mufflers extend in the same direction.

8. The distributed noise reduction box according to claim 1, characterized in that, The extending direction of each of the first silencers intersects the extending direction of the airflow channel; and / or, The extension direction of each of the second silencers intersects the extension direction of the airflow channel.

9. The distributed noise reduction box according to claim 1, characterized in that, Each of the first silencer tubes has its two ends respectively snapped onto the opposite side walls of the outer frame; and / or, Each of the second silencers is respectively snapped onto the opposite side walls of the outer frame at both ends.

10. The distributed noise reduction box according to claim 1, characterized in that, Each of the first silencing chambers includes a first silencing microporous cylinder and a first silencing filling cotton, the first silencing microporous cylinder being arranged around the first silencing filling cotton, and the two ends of the first silencing microporous cylinder being connected to opposite side walls of the outer frame; and / or, Each of the second silencing chambers includes a second silencing microporous cylinder and a second silencing filling cotton. The second silencing microporous cylinder is arranged around the second silencing filling cotton, and the two ends of the second silencing microporous cylinder are connected to the opposite side walls of the outer frame.

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