An exhaust air noise reduction silencer

Abstract

The application relates to an exhaust noise reduction silencer, which comprises a silencing bin, a first sound insulation plate, a second sound insulation plate, a third sound insulation plate and a fourth sound insulation plate; the first sound insulation plate, the second sound insulation plate, the third sound insulation plate and the fourth sound insulation plate are sequentially arranged in the silencing bin to form a multilayer sound insulation structure; wherein the silencing bin comprises a silencing bin cover, two side panels, a back panel and two bottom panels; the two side panels and the two bottom panels are fixedly surrounded to form upper and lower and left and right bin surfaces of the silencing bin; the silencing bin cover is arranged on an air inlet surface of the silencing bin to form a front bin surface; and the back panel is arranged on an air outlet surface of the silencing bin to form a back bin surface. The silencer provided by the application has a unique structure design combination of four sound insulation plates, and the loudness of generated noise is greatly reduced after passing through the four sound insulation plates.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of highland noise reduction, and particularly relates to an air exhaust noise reduction silencer. BACKGROUND

[0002] Due to the change of atmospheric pressure and partial pressure of various gases with the increase of altitude, low pressure and low oxygen content are common in high-altitude areas. People living in high-altitude areas for a short or long time are prone to high altitude reaction and high altitude disease, which is not conducive to the physical and mental health of the staff. In order to avoid the harm of the continuous high pressure environment in high-altitude areas to the human body, pressure-bearing buildings emerge as the times require. The pressure-bearing building mainly increases the local environmental pressure to reduce the equivalent altitude according to the local pressure-increasing theory. Due to the strong sealing of the pressure-bearing building, the carbon dioxide concentration in the building will gradually increase due to human respiration. In order to maintain the air composition suitable for life, the indoor and outdoor air must be circulated continuously. The indoor air is discharged to the outside through the exhaust pipe, and the clean outdoor air is filled into the indoor by the air compressor.

[0003] Due to the high pressure difference between indoor and outdoor, when the indoor air is discharged to the outside through the exhaust pipe, the indoor wind with a speed of 12 m / s rubs against the side wall of the exhaust pipe, generating a large amount of noise that enters the indoor, so a silencer is needed to eliminate and reduce such noise.

[0004] The existing noise elimination equipment needs to eliminate more noise, so it needs a larger volume. The installation in the house is not beautiful and occupies the space of the house. A silencer with small volume, easy to replace parts and good noise elimination performance needs to be designed. SUMMARY

[0005] (I) Technical problem to be solved

[0006] In view of the existing technical problems, the application provides an air exhaust noise reduction silencer, which solves the technical problems of large volume and poor noise reduction and silencing effect of the silencer in the prior art.

[0007] (II) Technical scheme

[0008] In order to achieve the above purpose, the main technical scheme adopted by the application comprises:

[0009] An air exhaust noise reduction silencer comprises a silencer, a first sound insulation plate, a second sound insulation plate, a third sound insulation plate and a fourth sound insulation plate.

[0010] The first sound insulation plate, the second sound insulation plate, the third sound insulation plate and the fourth sound insulation plate are arranged in the silencer in sequence to form a multi-layer silencing structure.

[0011] The silencer comprises a silencer cover, two side panels, a rear panel and two bottom panels.

[0012] The two side panels and the two bottom panels enclose and fix the upper and lower and left and right warehouse surfaces of the soundproof warehouse;

[0013] The soundproof warehouse cover is arranged at the air inlet surface of the soundproof warehouse to form the front warehouse surface;

[0014] The rear panel is arranged at the air outlet surface of the soundproof warehouse to form the rear warehouse surface.

[0015] Preferably, the soundproof warehouse cover is an open hollow cuboid welding piece, which is made of aluminum alloy with a thickness of 2 mm, and has decorative holes distributed on the surface thereof for air inlet.

[0016] Preferably, the side panel is made of aluminum alloy with a thickness of 2 mm;

[0017] The side panel has screw clamping grooves near the two bottom panels, and the screw clamping grooves are provided with a plurality of adjusting screws.

[0018] The rear panel is made of aluminum alloy with a thickness of 2 mm and has a round hole in the center thereof;

[0019] The bottom panel is made of aluminum alloy with a thickness of 2 mm.

[0020] Preferably, the two side panels, the rear panel and the two bottom panels are welded to each other to form an open hollow cuboid welding piece.

[0021] The welding piece is a soundproof warehouse box;

[0022] The outer side profile size of the soundproof warehouse box is equal to the inner side profile size of the soundproof warehouse cover;

[0023] The soundproof warehouse cover is buckled at the opening of the soundproof warehouse box;

[0024] The inner side wall of the soundproof warehouse cover is in clearance fit with the outer side wall of the soundproof warehouse box, and the fit clearance is equal to zero.

[0025] Preferably, the connecting pipe is further provided;

[0026] The connecting pipe is made of galvanized seamless steel pipe;

[0027] One end of the connecting pipe is provided with a pipe thread, the other end is inserted into the round hole arranged on the rear panel of the soundproof warehouse, and the connecting pipe is welded to the rear panel of the soundproof warehouse;

[0028] The diameter of the round hole is equal to the outer diameter of the connecting pipe.

[0029] Preferably, the first sound insulation plate is composed of a first hard baffle and a first sound absorption plate;

[0030] The first hard baffle is in the shape of a hollow rectangle, with an outer contour size equal to the size of the inner section of the soundproof chamber, and is made of hard rubber;

[0031] The first sound-absorbing plate is made of porous sound-absorbing material, with a size equal to the size of the hollow part of the first hard baffle, and a porosity of 60%-80%;

[0032] The first sound-absorbing plate is placed in the hollow part of the first hard baffle, with a clearance fit, and the fitting clearance is equal to zero.

[0033] Preferably, the second sound-absorbing plate is a whole sound-absorbing plate, with a size equal to the size of the inner section of the soundproof chamber, and is made of porous sound-absorbing material with a porosity of 15%-25%.

[0034] Preferably, the third sound-absorbing plate is composed of a second hard baffle and a second sound-absorbing plate;

[0035] The second sound-absorbing plate has the same shape and size as the first hard baffle in the first sound-absorbing plate, and is made of porous sound-absorbing material with a porosity of 60%-80%;

[0036] The second hard baffle has the same shape and size as the first sound-absorbing plate in the first sound-absorbing plate;

[0037] The second hard baffle is placed in the hollow part of the second sound-absorbing plate, with a clearance fit, and the fitting clearance is equal to zero.

[0038] Preferably, the fourth sound-absorbing plate has the same shape and size as the second sound-absorbing plate, and is made of porous sound-absorbing material with a porosity of 15%-25%.

[0039] Preferably, the spacing between the first sound-absorbing plate, the second sound-absorbing plate, the third sound-absorbing plate, and the fourth sound-absorbing plate is adjustable;

[0040] The installation inclination angle of the first sound-absorbing plate, the second sound-absorbing plate, the third sound-absorbing plate, and the fourth sound-absorbing plate is adjustable.

[0041] (Three) beneficial effects

[0042] The high-speed airflow passes through the four layers of sound-absorbing plates and rubs against the wall of the exhaust pipe, generating noise. The direction of the noise is opposite to that of the airflow. Due to the unique structural design of the four layers of sound-absorbing plates, the loudness of the generated noise is greatly reduced after passing through the four layers of sound-absorbing plates.

[0043] The noise reducer provided by the application has simple structure, is convenient to disassemble and replace parts, the interval and direction of the sound insulation plate are convenient to adjust, the sound insulation plate is not limited to being placed vertically on the bottom plate of the sound elimination bin, and in appropriate cases, the sound insulation plate can also be kept at a certain inclination angle, and such optimization needs to be simulated and calculated according to a specific indoor environment, for example, 100 of the sound eliminators are installed in an indoor environment of the same size, and the same air exchange effect is required, and the air volume passing through each sound eliminator in the same period is one percent compared with the air volume passing through one sound eliminator, in this case, the inclination angle of the sound insulation plate needs to be adjusted moderately to ensure that the low-speed wind can pass through the sound eliminator.

[0044] The noise reducer provided by the application is installed in a wall decoration layer, the pattern of the sound elimination bin cover plate can be customized according to customer requirements, and the sound elimination bin cover plate is integrated with the decorative wall surface, is beautiful and elegant, and has good concealment.

[0045] The noise reducer provided by the application also has the following characteristics: four-layer sound insulation plate design, complementary sound insulation plate and sound insulation plate structure; the unique structure design can allow the sound eliminator to be installed in the indoor decoration layer of a house; the sound insulation cover plate decoration hole can be customized, and the sound insulation cover plate decoration hole is beautiful, elegant and has good concealment; and the installation position and installation angle of each sound insulation plate can be adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 is a schematic view of the internal structure of the sound eliminator provided in the embodiment;

[0047] Figure 2 is a schematic view of the external structure of the sound eliminator provided in the embodiment;

[0048] Figure 3 is a schematic view of the installation of the sound eliminator provided in the embodiment;

[0049] Figure 4 is a schematic view of the sound elimination bin structure of the sound eliminator provided in the embodiment;

[0050] Figure 5 is a schematic view of the first sound insulation plate structure of the sound eliminator provided in the embodiment;

[0051] Figure 6 is a schematic view of the second sound insulation plate structure of the sound eliminator provided in the embodiment;

[0052] Figure 7 is a schematic view of the third sound insulation plate structure of the sound eliminator provided in the embodiment;

[0053] Figure 8 is a schematic view of the sound elimination bin cover structure of the sound eliminator provided in the embodiment.

[0054]

Explanation of reference numerals

[0055] 1: Silence chamber; 101: Silence chamber cover; 102: Side panel; 10201: Screw slot; 10202: Adjustment screw; 103: Rear panel; 104: Bottom panel; 2: Connecting pipe; 3: First sound insulation board; 301: First hard baffle; 302: First sound-absorbing board; 4: Second sound insulation board; 5: Third sound insulation board; 501: Second hard baffle; 502: Second sound-absorbing board; 6: Fourth sound insulation board. DETAILED DESCRIPTION

[0056] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation methods in conjunction with the accompanying drawings.

[0057] Example 1

[0058] like Figures 1-8 As shown: This embodiment discloses an exhaust noise reduction muffler, which includes a muffler chamber 1, a connecting pipe 2, a first sound insulation board 3, a second sound insulation board 4, a third sound insulation board 5, and a fourth sound insulation board 6.

[0059] The silencer chamber 1 consists of a silencer chamber cover 101, side panels 102, a rear panel 103 and a bottom panel 104; the silencer chamber cover 101 is shaped like an open hollow cubic welded part, and its material is aluminum alloy with a thickness of 2 mm. Decorative holes are distributed on its panel, and the distribution pattern of the decorative holes can be customized according to customer needs.

[0060] There are two side panels 102, made of aluminum alloy with a thickness of 2 mm; the side panels 102 are respectively provided with screw slots 10201 near the two bottom panels, and the screw slots are equipped with 16 adjustment screws 10202; the rear panel 103 is made of aluminum alloy with a thickness of 2 mm, and has a circular hole in its center, the diameter of the hole is equal to the outer diameter of the connecting pipe 2; the bottom panel 104 is made of aluminum alloy with a thickness of 2 mm.

[0061] The two side panels 102, the back panel 103 and the two bottom panels 104 are welded together into an open hollow cuboid welded piece, which is referred to as a soundproof chamber box here. The outer side profile size of the soundproof chamber box is equal to the inner side profile size of the soundproof chamber cover 101. The soundproof chamber cover 101 is buckled on the welded piece, and the inner side wall of the soundproof chamber cover 101 is in clearance fit with the outer side wall of the welded piece, with a clearance of zero. The connecting pipe 2 is made of galvanized seamless steel pipe. One end of the connecting pipe 2 is provided with a pipe thread, and the other end is inserted into the circular hole provided on the back panel 103 of the soundproof chamber and welded on the back panel 103 of the soundproof chamber. The first sound insulation plate 3 is composed of a first hard baffle 301 and a first sound absorption plate 302. The first hard baffle 301 is in the shape of a hollow rectangle, and the outer profile size is equal to the inner cross-sectional size of the soundproof chamber 1. The material is hard rubber. The first sound absorption plate 302 is made of porous sound absorption material, and the size is equal to the size of the hollow part of the first hard baffle 301. The porosity is 60%-80%. The first sound absorption plate 302 is placed in the hollow part of the hard baffle 301, and the fit relationship is clearance fit, with a clearance of zero.

[0062] The second sound insulation plate 4 is a whole sound absorption plate, which is equal in size to the inner cross-sectional size of the soundproof chamber 1 and is made of porous sound absorption material with a porosity of 15%-25%.

[0063] The third sound insulation plate 5 is composed of a second hard baffle 501 and a second sound absorption plate 502. The second sound absorption plate 502 is consistent in shape and size with the first hard baffle 301 in the first sound insulation plate, and is made of porous sound absorption material with a porosity of 60%-80%. The second hard baffle 501 is consistent in shape and size with the first sound absorption plate 302 in the first sound insulation plate, and is placed in the second sound absorption plate 502.

[0064] The fourth sound insulation plate 6 is equal in shape and size to the second sound insulation plate 4 and is made of porous sound absorption material with a porosity of 15%-25%.

[0065] The distance between the first sound insulation plate 3, the second sound insulation plate 4, the third sound insulation plate 5 and the fourth sound insulation plate 6 can be adjusted. The soundproof chamber cover 101 is opened. The first sound absorption plate 302 is glued on the side of the hard baffle 301 to form the first sound insulation plate 3. The first sound insulation plate 3 is placed in the soundproof chamber, and the adjusting screw 10202 is screwed into the side wall of the first sound insulation plate 3 through the screw slot 10201. After adjusting the position of the first sound insulation plate 3, the adjusting screw is tightened.

[0066] The second sound insulation plate 4, the third sound insulation plate 5 and the fourth sound insulation plate 6 are fixed in the soundproof chamber 1 in the same way, respectively, in sequence. Then the soundproof chamber cover 101 is buckled on the soundproof chamber box.

[0067] Install the silencer on the decorative layer, and connect the connecting pipe 2 to the exhaust pipe to the outside through threaded connection;

[0068] When the indoor exhaust is in progress, the wind enters the silencer chamber through the panel holes of the silencer chamber cover 101, passes through the fourth sound insulation board, the third sound insulation board, the second sound insulation board, the first sound insulation board, and finally is discharged through the connecting pipe 2. When the wind reaches the connecting pipe 2, it will rub against the pipe wall, generating noise. The noise spreads in all directions. Part of the noise is absorbed by the pipe wall, and the noise along the opposite direction of the wind flow re-enters the silencer chamber 1. When passing through the first sound insulation board 3, the hard baffle 301 reflects part of the sound waves, and part of the sound waves pass through the sound absorbing board 302. Due to the unique hole design of the sound absorbing material, the sound waves are concentrated in the dense holes. The sound waves rub against the hole walls, converting sound energy into heat, thereby reducing noise. The remaining noise is discharged through the first sound insulation board 3, continues to move in the opposite direction of the airflow, and then passes through the second sound insulation board 4, where they continue to consume some of the sound energy. The sound waves continue to move to the third sound insulation board 5. Because the structural design of the third sound insulation board 5 complements that of the first sound insulation board 3, most of the sound waves are repeatedly reflected between the first and third sound insulation boards 3 and 5, repeatedly passing through the second sound insulation board 4 to consume sound energy. A small amount of residual sound waves exit the third sound insulation board 5, reach the fourth sound insulation board 6, continue to consume some sound energy, and then enter the room. This effectively reduces the noise of duct exhaust.

[0069] Example 2

[0070] like Figures 1-8 As shown: This embodiment discloses an exhaust noise reduction muffler, including: a muffler chamber 1, a first sound insulation board 3, a second sound insulation board 4, a third sound insulation board 5 and a fourth sound insulation board 6.

[0071] The first sound insulation board 3, the second sound insulation board 4, the third sound insulation board 5 and the fourth sound insulation board 6 are arranged in sequence in the sound-absorbing chamber 1 to form a multi-layer sound-absorbing structure; wherein, the sound-absorbing chamber 1 includes: a sound-absorbing chamber cover 101, two side panels 102, a rear panel 103 and two bottom panels 104; the two side panels 102 and the two bottom panels 104 are fixedly enclosed to form the upper, lower, left and right chamber surfaces of the sound-absorbing chamber 1.

[0072] The muffler cover 101 is arranged on the air inlet surface of the muffler chamber 1 to form a front chamber surface; the rear panel 104 is arranged on the air outlet surface of the muffler chamber 1 to form a rear chamber surface.

[0073] The silencer cover 101 in this embodiment is in the shape of an open hollow cubic welded part, and its material is aluminum alloy with a thickness of 2 mm. Decorative holes are distributed on its panel for air intake.

[0074] The material of the side panel 102 is aluminum alloy, and the thickness is 2mm; the side panel 102 is provided with screw clamping grooves 10201 near the two bottom panels 104, and the screw clamping grooves 10201 are provided with multiple adjusting screws 10202; the material of the rear panel 103 is aluminum alloy, and the thickness is 2mm; the rear panel 103 is provided with a circular hole in the center; the material of the bottom panel 104 is aluminum alloy, and the thickness is 2mm.

[0075] The two side panels 102, the rear panel 103 and the two bottom panels 104 are welded into an open hollow cuboid welding piece; the welding piece is a soundproof box; the size of the outer side profile of the soundproof box is equal to the size of the inner side profile of the soundproof cover 101.

[0076] The soundproof cover 101 is buckled at the opening of the soundproof box; the inner side wall of the soundproof cover 101 is in clearance fit with the outer side wall of the soundproof box, and the fitting clearance is equal to zero.

[0077] The soundproof cover 101 is buckled at the opening of the soundproof box; the inner side wall of the soundproof cover 101 is in clearance fit with the outer side wall of the soundproof box, and the fitting clearance is equal to zero.

[0078] The first sound insulation plate 3 is composed of a first hard baffle 301 and a first sound absorption plate 302; the first hard baffle 301 is in the shape of a hollow rectangle, and the size of the outer profile is equal to the size of the inner cross section of the soundproof box 1; the material of the first hard baffle 301 is hard rubber; the material of the first sound absorption plate 302 is porous sound absorption material, and the size of the first sound absorption plate 302 is equal to the size of the hollow part of the first hard baffle 301; the porosity of the first sound absorption plate 302 is 60%-80%; the first sound absorption plate 302 is placed in the hollow part of the first hard baffle 301, and the fitting relationship is clearance fit, and the fitting clearance is equal to zero.

[0079] The second sound insulation plate 4 is a whole sound absorption plate, and the size of the second sound insulation plate 4 is equal to the size of the inner cross section of the soundproof box 1; the material of the second sound insulation plate 4 is porous sound absorption material, and the porosity of the second sound insulation plate 4 is 15%-25%.

[0080] The third soundproof plate 5 in the embodiment is composed of a second hard baffle 501 and a second sound absorbing plate 502; the second sound absorbing plate 502 is consistent with the first hard baffle 301 in the first soundproof plate 3 in shape and size, and is made of porous sound absorbing material with a porosity of 60%-80%; the second hard baffle 501 is consistent with the first sound absorbing plate 302 in the first soundproof plate 3 in shape and size; the second hard baffle 501 is placed in the hollow part of the second sound absorbing plate 502 in a clearance fit with a fitting clearance of zero.

[0081] The fourth soundproof plate 6 in the embodiment is consistent with the second soundproof plate 4 in shape and size, and is made of porous sound absorbing material with a porosity of 15%-25%.

[0082] The spacing between the first soundproof plate 3, the second soundproof plate 4, the third soundproof plate 5 and the fourth soundproof plate 6 in the embodiment is adjustable; and the installation inclination angle of the first soundproof plate 3, the second soundproof plate 4, the third soundproof plate 5 and the fourth soundproof plate 6 is adjustable.

[0083] The technical principles of the present application are described above in combination with specific embodiments, and these descriptions are only for explaining the principles of the present application and cannot be interpreted as limiting the protection scope of the present application in any way. Based on the explanations herein, other specific embodiments of the present application can be conceived by those skilled in the art without creative efforts, and these embodiments will all fall within the protection scope of the present application.

Claims

1. An exhaust air noise reduction silencer, characterized in that The silencer comprises: a silencer, a first sound insulation board, a second sound insulation board, a third sound insulation board and a fourth sound insulation board; the first sound insulation board, the second sound insulation board, the third sound insulation board and the fourth sound insulation board are arranged in the silencer in sequence to form a multi-layer sound insulation structure; the silencer comprises a silencer cover, two side panels, a back panel and two bottom panels; the two side panels and the two bottom panels are fixed to form the upper and lower and left and right silencer surfaces; the silencer cover is arranged on the air inlet surface of the silencer to form the front surface of the silencer; the back panel is arranged on the air outlet surface of the silencer to form the back surface of the silencer; the first sound insulation board is composed of a first hard baffle and a first sound absorption board; the first hard baffle is in the shape of a hollow rectangle, and the outer contour size is equal to the size of the cross section of the silencer, and the material is hard rubber; the first sound absorption board is made of porous sound absorption material, and the size is equal to the size of the hollow part of the first hard baffle, and the porosity is 60%-80%; the first sound absorption board is placed in the hollow part of the first hard baffle, and the fit is gap fit, and the fit gap is equal to zero; the second sound insulation board is a whole sound absorption board, and the size is equal to the size of the cross section of the silencer, and the material is porous sound absorption material, and the porosity is 15%-25%; the third sound insulation board is composed of a second hard baffle and a second sound absorption board; the second sound absorption board is the same in shape and size as the first hard baffle in the first sound insulation board, and the material is porous sound absorption material, and the porosity is 60%-80%; the second hard baffle is the same in shape and size as the first sound absorption board in the first sound insulation board; the second hard baffle is placed in the hollow part of the second sound absorption board, and the fit is gap fit, and the fit gap is equal to zero; the fourth sound insulation board is the same in shape and size as the second sound insulation board, and the material is porous sound absorption material, and the porosity is 15%-25%; the silencer is installed on the wall decoration layer; the silencer further comprises a connecting pipe; the connecting pipe is screwed to the air outlet pipe until the outside.

2. The silencer of claim 1, wherein the shape of the silencer cover is an open hollow cube welding piece, the material is aluminum alloy, the thickness of the aluminum alloy is 2mm, and there are decorative holes on the surface of the silencer cover for air inlet.

3. The silencer of claim 2, wherein the material of the side panel is aluminum alloy, and the thickness is 2mm; the part of the side panel near the two bottom panels is provided with a screw clamping groove, and the screw clamping groove is provided with a plurality of adjusting screws; the material of the back panel is aluminum alloy, and the thickness is 2mm, and there is a round hole in the center of the back panel; the material of the bottom panel is aluminum alloy, and the thickness is 2mm.

4. The silencer of claim 3, wherein the two side panels, the back panel and the two bottom panels are welded into an open hollow cube welding piece; the welding piece is a silencer box; the outer side contour size of the silencer box is equal to the inner side contour size of the silencer cover; the silencer cover is buckled at the opening of the silencer box. The inner side wall of the sound attenuation bin cover is in clearance fit with the outer side wall of the sound attenuation bin box, and the fit clearance is equal to zero.

5. The sound attenuation device of claim 3, wherein the connecting pipe is a galvanized seamless steel pipe. One end of the connecting pipe is provided with a pipe thread, the other end is placed in a circular hole provided in the rear panel of the sound attenuation bin, and the connecting pipe is welded to the rear panel of the sound attenuation bin. The diameter of the circular hole is equal to the outer diameter of the connecting pipe.

6. The sound attenuation device of claim 1, wherein the spacing between the first sound insulation board, the second sound insulation board, the third sound insulation board and the fourth sound insulation board is adjustable. The installation inclination angle of the first sound insulation board, the second sound insulation board, the third sound insulation board and the fourth sound insulation board is adjustable. ​ ​

Images