A composite sound muffler

Abstract

The utility model relates to the field of noise elimination and noise reduction discloses a compound sound elimination and noise reduction ware, including upper casing, the lower part of upper casing is provided with lower casing, upper casing and lower casing are detachably connected through bolt, be provided with sound elimination mechanism between upper casing and lower casing, the left side of upper casing and lower casing is provided with cleaning mechanism, the cleaning mechanism includes assembly box, the left end of assembly box and lower casing is fixedly connected, the inner wall sliding connection of assembly box has filter frame, the inner wall of filter frame is opened to have sound absorption hole, the bottom of filter frame is opened to have descaling groove. In the utility model, through the setting of cleaning mechanism, ensure that the airflow that enters the air control pipe can move along the air control pipe under the action of air pressure, and the sound wave can pass through the sound transmission groove, and back and forth reflection between the two horizontal plates of the partition frame, when encountering the sound wave that is completely opposite to its direction, mutually offset, reach better noise reduction effect.

Description

Technical Field

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

[0002] Sound is a mechanical wave that relies on a material medium, such as air, water, or solids, to propagate. Sound waves transfer energy through the vibration of particles in the medium, forming longitudinal waves. The vibration of any object can serve as a sound source, causing the surrounding medium particles to vibrate. When a sound wave encounters an obstacle, it will bounce back.

[0003] A noise reducer, also known as a silencer, mute, or noise reduction device, is a device used to reduce or eliminate the propagation of sound. It reduces the impact of noise on the surrounding environment by absorbing, reflecting, or interfering with sound waves, thereby improving the acoustic environment.

[0004] Currently, noise reduction devices often reduce noise by reducing the volume of airflow. However, in actual use, the airflow entering the noise reduction device often carries dust or other impurities, which can cause sound waves to come into contact with the noise reduction device, thus weakening the noise reduction effect. To address this issue, a composite noise reduction device is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a composite noise reduction device, which aims to improve the problem that dust entering the device can easily weaken its noise reduction effect.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a composite noise reduction device, comprising an upper housing, a lower housing disposed below the upper housing, the upper housing and the lower housing being detachably connected by bolts, a noise reduction mechanism being disposed between the upper housing and the lower housing, and a cleaning mechanism being disposed on the left side of the upper housing and the lower housing;

[0007] The cleaning mechanism includes an assembly box, the right end of which is fixedly connected to the left end of the lower housing. A filter frame is slidably connected to the inner wall of the assembly box. The inner wall of the filter frame is provided with sound-absorbing holes. A dust removal groove is provided at the bottom of the filter frame. A locking component is provided inside the filter frame and at the top of the assembly box.

[0008] As a further description of the above technical solution:

[0009] The locking assembly includes a slide rod, the left outer wall of which is slidably connected to the left side of the filter frame, and a fixing hole is provided at the top of the assembly box.

[0010] As a further description of the above technical solution:

[0011] A cleaning box is fixedly connected to the bottom of the assembly box, and a drawer slides inside the cleaning box.

[0012] As a further description of the above technical solution:

[0013] The silencing mechanism includes an air control duct. The left end of the air control duct is fixedly connected to the inner wall of the left side of the lower housing. The left end of the air control duct communicates with the interior of the assembly box. A partition frame is fixedly connected to the inner wall of the lower housing. The inner wall of the partition frame is through and fixedly connected to the outer wall of the air control duct. A sound passage groove is provided on the inner wall of the air control duct inside the partition frame.

[0014] As a further description of the above technical solution:

[0015] A sound-absorbing box is fixedly connected to the right end of the air control duct. The sound-absorbing box is filled with sound-absorbing cotton. An air outlet duct is fixedly connected to the right end of the sound-absorbing box. The outer wall of the air outlet duct is penetrating and fixedly connected to the inner wall of the lower shell.

[0016] As a further description of the above technical solution:

[0017] A dustproof sheet is fixedly connected to the inner left side of the assembly box, and the dustproof sheet is arc-shaped.

[0018] As a further description of the above technical solution:

[0019] The partition frame is a sealed enclosure, and the partition frame is in the shape of a cuboid, with multiple cuboid grooves of equal width inside the partition frame.

[0020] As a further description of the above technical solution:

[0021] The assembly box has a through groove on its inner wall below the ash removal tank that communicates with the cleaning box.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, by assembling a box, filter frame, sound-absorbing hole, dustproof sheet, cleaning box, drawer, and dust removal trough, it is ensured that when the airflow carrying sound waves enters the area between the upper and lower shells, the dust or other impurities carried inside can be effectively filtered, and the staff can clean the filter frame in a timely and convenient manner, thereby preventing dust from affecting the noise reduction effect.

[0024] 2. In this utility model, by setting up the air control pipe, the partition frame, the sound channel, the sound absorption box, and the air outlet pipe, it is ensured that the airflow entering the air control pipe can move along the air control pipe under the action of air pressure, while the sound wave can pass through the sound channel and reflect back and forth between the two horizontal plates of the partition frame. When it encounters a sound wave with a completely opposite direction, they cancel each other out, achieving a better noise reduction effect. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the overall structure of this utility model;

[0026] Figure 2 This is a three-dimensional cross-sectional view of the overall structure of this utility model;

[0027] Figure 3 This is a three-dimensional cross-sectional view of the assembly box and its internal structure in this utility model;

[0028] Figure 4 This is a three-dimensional structural breakdown diagram of a portion of the cleaning mechanism in this utility model.

[0029] Legend:

[0030] 1. Upper housing; 2. Lower housing; 3. Silencing mechanism; 4. Cleaning mechanism; 41. Assembly box; 42. Filter frame; 43. Sound absorption hole; 44. Locking component; 45. Dustproof sheet; 46. Cleaning box; 47. Drawer; 48. Dust removal trough; 31. Air control duct; 32. Divider frame; 33. Sound passage trough; 34. Sound absorption box; 35. Air outlet duct; 441. Slide rod; 442. Fixing hole. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figure 1 and Figure 2 The present invention provides an embodiment of a composite noise reduction device, comprising an upper housing 1 and a lower housing 2 disposed below the upper housing 1. The upper housing 1 and the lower housing 2 have the same shape and are symmetrically arranged on the upper surface of the lower housing 2. The upper housing 1 and the lower housing 2 are detachably connected by bolts. The detachable nature ensures that the internal structure can be cleaned after the upper housing 1 and the lower housing 2 are disassembled relative to each other.

[0033] Reference Figure 1 and Figure 2A silencing mechanism 3 is provided between the upper shell 1 and the lower shell 2. The silencing mechanism 3 includes an air control duct 31, which is a combination of multiple horizontal and vertical pipes. The entire air control duct 31 is a continuous, unbranched pipe. The left end of the air control duct 31 is fixedly connected to the inner left wall of the lower shell 2, allowing filtered airflow to enter the air control duct 31. A partition frame 32 is fixedly connected to the inner wall of the lower shell 2. The inner wall of the partition frame 32 is through-hole and fixedly connected to the outer wall of the air control duct 31. The partition frame 32 is sealed, ensuring that airflow inside the air control duct 31 cannot enter and remains within the partition frame 32. The frame 32 is rectangular in shape, and the interior of the partition frame 32 has multiple rectangular grooves of the same width. The inner wall of the air control pipe 31, which is located inside the partition frame 32, has a sound passage groove 33. The sound passage groove 33 is located in the vertical area of ​​the air control pipe 31. The right end of the air control pipe 31 is fixedly connected to a sound absorption box 34. The inside of the sound absorption box 34 is equipped with sound-absorbing cotton. The sound absorption cotton ensures that sound waves that do not pass through the sound passage groove 33 can be absorbed by the sound-absorbing cotton, thereby enhancing the sound absorption effect. The right end of the sound absorption box 34 is fixedly connected to an air outlet pipe 35. The air outlet pipe 35 allows the airflow of absorbed sound waves to pass through the air outlet pipe 35. The outer wall of the air outlet pipe 35 is through and fixedly connected to the inner wall of the lower housing 2.

[0034] Reference Figures 2-4 A cleaning mechanism 4 is provided on the left side of the upper housing 1 and the lower housing 2. The cleaning mechanism 4 includes an assembly box 41. The left end of the air control pipe 31 is connected to the interior of the assembly box 41. The right end of the assembly box 41 is fixedly connected to the left end of the lower housing 2. A filter frame 42 is slidably connected to the inner wall of the assembly box 41. The filter frame 42 is hollow cylindrical in shape, with an opening at the left end and a solid right end. Sound-absorbing holes 43 are provided on the inner wall of the filter frame 42. A dust removal groove 48 is provided at the bottom. The dust removal groove 48 allows impurities adhering to the inner wall of the filter frame 42 to leave the interior of the filter frame 42 through the dust removal groove 48. A cleaning box 46 is fixedly connected to the bottom of the assembly box 41. A drawer 47 slides inside the cleaning box 46. A through groove communicating with the cleaning box 46 is provided on the inner wall of the assembly box 41 below the dust removal groove 48. The through groove ensures that impurities falling through the dust removal groove 48 can enter the interior of the cleaning box 46.

[0035] Reference Figures 2-4A locking component 44 is provided inside the filter frame 42 and at the top of the assembly box 41. The locking component 44 includes a slide rod 441, which is concave in shape. The left outer wall of the slide rod 441 is slidably connected to the left side of the filter frame 42. The slide rod 441 slides up and down relative to the filter frame 42. The slide rod 441 is located inside the protrusion of the assembly box 41 at the left end of the filter frame 42. A fixing hole 442 is provided at the top of the assembly box 41. The diameter of the fixing hole 442 matches the diameter of the slide rod 441. The outer wall of the slide rod 441 is coated with a rubber coating. A dustproof sheet 45 is fixedly connected to the left inner wall of the assembly box 41. The dustproof sheet 45 is arc-shaped. The dustproof sheet 45 ensures that some impurities that pass through the sound absorption hole 43 are not easily retained inside the assembly box 41.

[0036] Working principle: When in use, when the airflow enters the assembly box 41, the impurities it carries enter the inner side of the air control pipe 31 after passing through the filter frame 42. During this process, because the airflow needs to pass through the sound absorption hole 43, it can achieve a preliminary noise reduction effect. The impurities mixed in the airflow cannot pass through the sound absorption hole 43 and therefore stick to the inner wall of the filter frame 42.

[0037] If a lot of impurities accumulate during the use of the equipment, they can be carried by gravity along the arc surface of the lower half of the filter frame 42, passing through the ash removal trough 48 and entering the drawer 47 inside the cleaning box 46.

[0038] When the equipment has been used for a long time, impurities stick to the surface of the filter frame 42 and cannot be removed by itself. The staff first moves the slide bar 441 upward and then pulls the slide bar 441 to the left, so that the slide bar 441 drives the filter frame 42 to move to the left.

[0039] During the movement, the inner side of the filter frame 42 is in contact with the inner wall of the assembly box 41, so the impurities adhering to it can be scraped off. Since the scraped impurities are in the same position at the same time, their mass increases, so they can pass through the ash removal groove 48 and enter the drawer 47 under the action of gravity.

[0040] As some of the impurities passing through the filter frame 42 move, they first enter the larger inner diameter area of ​​the dust separator 45, so the impurities do not come into contact with any items at this time. Then, the dust moves with the filter frame 42 to the area where the diameter of the dust separator 45 gradually changes. During this process, the dust is pushed by the inner surface of the dust separator 45 and moves towards the filter frame 42. Therefore, after the filter frame 42 moves to the outside, the impurities can enter the sound absorption hole 43. Since the filter frame 42 passes through the assembly box 41 at this time, the staff can directly clean the filter frame 42 located in the area outside the assembly box 41.

[0041] The filtered airflow enters the air control duct 31. After passing through the location where the sound channel 33 exists, if the airflow enters the partition frame 32, it will cause the air pressure inside the partition frame 32 to be too high. Therefore, although the airflow may exchange with the gas inside the partition frame 32, it cannot stay inside the partition frame 32. The sound waves can pass smoothly through the sound channel 33 and reflect back and forth in the area inside the partition frame 32 after passing through. During the reflection process, when sound waves of opposite directions appear, they cancel each other out, achieving a noise reduction effect.

[0042] After multiple sound attenuation processes, the remaining sound waves enter the sound-absorbing box 34 with the airflow, allowing the remaining sound waves to be absorbed by the sound-absorbing cotton. As a result, the sound waves carried in the airflow passing through the air outlet 35 are reduced, achieving a noise reduction effect.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A composite noise reduction device, comprising an upper housing (1), characterized in that: A lower housing (2) is provided below the upper housing (1). The upper housing (1) and the lower housing (2) are detachably connected by bolts. A noise reduction mechanism (3) is provided between the upper housing (1) and the lower housing (2). A cleaning mechanism (4) is provided on the left side of the upper housing (1) and the lower housing (2). The cleaning mechanism (4) includes an assembly box (41), the right end of which is fixedly connected to the left end of the lower housing (2), a filter frame (42) is slidably connected to the inner wall of the assembly box (41), a sound-absorbing hole (43) is provided on the inner wall of the filter frame (42), a dust removal groove (48) is provided at the bottom end of the filter frame (42), and a locking component (44) is provided inside the filter frame (42) and at the top of the assembly box (41).

2. The composite noise reduction device according to claim 1, characterized in that: The locking assembly (44) includes a slide rod (441), the left outer wall of the slide rod (441) is slidably connected to the left side of the filter frame (42), and a fixing hole (442) is provided at the top of the assembly box (41).

3. The composite noise reduction device according to claim 1, characterized in that: A cleaning box (46) is fixedly connected to the bottom of the assembly box (41), and a drawer (47) slides inside the cleaning box (46).

4. The composite noise reduction device according to claim 1, characterized in that: The silencing mechanism (3) includes a control duct (31). The left end of the control duct (31) is fixedly connected to the left inner wall of the lower housing (2). The left end of the control duct (31) is connected to the interior of the assembly box (41). A partition frame (32) is fixedly connected to the inner wall of the lower housing (2). The inner wall of the partition frame (32) is through and fixedly connected to the outer wall of the control duct (31). A sound passage groove (33) is opened on the inner wall of the control duct (31) inside the partition frame (32).

5. A composite noise reduction device according to claim 4, characterized in that: The right end of the air control pipe (31) is fixedly connected to a sound-absorbing box (34), the inside of the sound-absorbing box (34) is provided with sound-absorbing cotton, the right end of the sound-absorbing box (34) is fixedly connected to an air outlet pipe (35), the outer wall of the air outlet pipe (35) is through and fixedly connected to the inner wall of the lower shell (2).

6. A composite noise reduction device according to claim 2, characterized in that: A dustproof sheet (45) is fixedly connected to the inner left side of the assembly box (41), and the dustproof sheet (45) is arc-shaped.

7. A composite noise reduction device according to claim 4, characterized in that: The partition frame (32) is a sealed enclosure, and the partition frame (32) is a cuboid in shape, and the interior of the partition frame (32) has multiple cuboid grooves of the same width.

8. A composite noise reduction device according to claim 3, characterized in that: The assembly box (41) has a through groove on its inner wall below the ash removal tank (48) that communicates with the cleaning box (46).

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