Efficient fan silencer

Abstract

The utility model relates to the technical field of silencer devices, in particular to an efficient fan silencer, which comprises a fan silencer main body, a silencing core part of the fan silencer main body is as follows: a common limit type resistance-limiting composite wide interesting belt silencing body is arranged in the fan silencer main body and is formed by compounding a resonator and a resistive sound absorption ring made of resistive sound absorption materials, the cavity depth is 15cm, the agricultural thickness is 25mm, and the inner side of the fan silencer main body is provided with a plurality of through holes; the sound absorption coefficients of resonators with the punching rates of 06%, 1%, 12% and 2% within the frequency range of 125-400 HZ are all larger than 07, the resonance silencing body is matched with a glass wool integrated body (the density is 2 skgm, and the surface glass is combined with a steel plate net), so that the sound absorption coefficient of the resonance silencing body within the broadband range of 125-8000 Hz reaches up to more than 07, and the sound absorption coefficient of the resonance silencing body within the broadband range of 125-8000 Hz reaches up to more than 07. Meanwhile, the silencer made of a plurality of common-limit type limited-resistance composite wide interesting belt silencing body structures is adopted, and a good silencing effect can be obtained within a wide frequency range by selecting the combination of different plate thicknesses, perforation L diameters, different cavity depths behind the silencing perforated plates and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of muffler devices, in particular to a high-efficiency fan muffler. Background Art

[0002] The fan silencer is the same as the exhaust duct silencer and the induced draft fan silencer. They all adopt the principle of resistive sound absorption and noise reduction, which has a good effect on the broadband characteristics of medium and high frequencies, the principle of resistant sound absorption and noise reduction, which has a good effect on the low, medium frequency and pulsation characteristics, as well as micro-perforated silencers and impedance composite silencers. The resistive silencer is an absorption silencer produced by the industry. According to the different airflow channel structures, it is generally divided into straight pipe type, sheet type, folded plate type, honeycomb type, acoustic flow type, labyrinth type and elbow type. The resistive silencer uses the friction and viscosity resistance of sound waves when they propagate in porous sound-absorbing materials, converting sound energy into heat energy and dissipating it, thereby achieving the purpose of noise reduction. It is the most widely used type of silencer among all silencers. The reactive silencer is different from the resistive silencer in that it cannot directly absorb sound energy, but uses the sudden interface or side resonance cavity on the pipeline to make certain frequency sound waves propagating along the pipeline reflect and interfere at the sudden interface.

[0003] At present, fans generate considerable noise during high-speed operation, which interferes with people's normal work and rest. For this reason, various silencers are provided on the market, but the effects are not very ideal and the silencers have complex structures, high maintenance costs and poor silencer effects. At the same time, when the fan is used for a long time to silence the fan, dust will accumulate inside the silencer. Failure to clean it in time will affect the stability of the silencer performance and thus affect the service life of the silencer.

[0004] In view of this, we propose an efficient fan muffler. Utility Model Content

[0005] In order to make up for the above deficiencies, the utility model provides a high-efficiency fan muffler.

[0006] The technical solution of the utility model is:

[0007] A high-efficiency fan silencer comprises a fan silencer body, characterized in that: a silencer assembly is installed inside the fan silencer body, a protective assembly is installed at the input end of the silencer assembly, the silencer assembly comprises: a resonator, a resistive sound absorbing ring, a resonance silencer, a glass wool integrated body, and a silencer perforated plate, a resonator is installed on the side of the silencer assembly, a resistive sound absorbing ring is installed at the front end of the resonator, a resonance silencer is installed at the front end of the resistive sound absorbing ring, a connecting column is fixedly installed at the front end of the resonance silencer, and a glass wool integrated body is provided at the front end of the connecting column.

[0008] As a preferred technical solution, a sound receiving groove is provided on the side of the resonator, and a sound-absorbing perforated plate is installed on the front end of the glass wool assembly.

[0009] As a preferred technical solution, the protective component includes: a mounting plate 1, a connecting inner cavity, a filter screen, and a mounting hole. A protective component is fixedly installed on the side of the protective component, a mounting end is opened on the side of the protective component, a mounting plate 1 is installed on the side of the mounting end, and a mounting plate 2 is installed at the front end of the mounting plate 1.

[0010] As a preferred technical solution, a connecting inner cavity is installed below the second mounting plate, a filter screen is installed inside the connecting inner cavity, and a mounting hole is opened at the front end of the connecting inner cavity.

[0011] As a preferred technical solution, a protective outer wall is installed at the rear end of the connecting inner cavity, and an outer wall anti-corrosion coating is installed on the outer side of the protective outer wall.

[0012] As a preferred technical solution, a front mounting seat is installed on the right side of the protective outer wall, and a mounting baffle is opened on the side of the front mounting seat.

[0013] As a preferred technical solution, a limiting ring groove is installed inside the protective outer wall, a silencer cavity is opened on the outer side of the limiting ring groove, a side baffle is opened at the rear end of the silencer cavity, and a mounting base is opened below the side baffle.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The core part of the main body of the fan silencer of the utility model is the internal co-limited limited impedance composite wide-band silencer, which is composed of a resonator and a resistive sound-absorbing ring of resistive sound-absorbing material. The cavity depth is 15 cm, the thickness is 25 mm, and the perforation rates are 0.6%, 1%, 12%, 6%, and 2%. The sound absorption coefficient of the resonator in the frequency range of 125-400HZ is all above 0.7. The resonant silencer is matched with a glass wool assembly (density 2skgm, and the surface is made of glass-finished steel plate mesh) to make the sound absorption coefficient of the resonant silencer in the wide frequency range of 125-8000Hz as high as 0.7. At the same time, the silencer made of multiple co-limited limited impedance composite wide-band silencer structures can obtain good sound absorption effect in a wider frequency range by selecting different combinations of plate thickness, perforation diameter, and different cavity depths behind the silencer perforated plate.

[0016] 2. The utility model is connected to the fan sound outlet cavity through the mounting hole and docked to the fan muffler body. The mounting plate 1 and the mounting plate 2 fit into the inside of the protective component to facilitate the transmission of sound. At the same time, a dust filter is installed inside the fan connection cavity to prevent dust from entering the inside of the muffler and causing problems that are difficult to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main structure of the fan muffler of the utility model;

[0018] Figure 2 This is a schematic diagram of the appearance component structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the muffler assembly of the utility model;

[0020] Figure 4 This is a schematic diagram of the protective component structure of the utility model.

[0021] In the figure: 1. Fan silencer body; 11. Protective outer wall; 12. Limiting ring groove; 13. Anti-corrosion coating on outer wall; 14. Front mounting seat; 15. Mounting baffle; 16. Mounting base; 17. Side baffle; 18. Silencing cavity; 2. Silencing assembly; 21. Resonator; 22. Resistive sound absorbing ring; 23. Resonant silencer; 24. Glass wool assembly; 25. Silencing perforated plate; 26. Connecting column; 27. Sound receiving slot; 3. Protective assembly; 31. Mounting plate 1; 32. Mounting plate 2; 33. Connecting cavity; 34. Filter; 35. Mounting hole; 36. Mounting end. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0024] See also Figures 1 to 4 , the utility model provides a technical solution:

[0025] A high-efficiency fan silencer comprises a fan silencer body 1, a silencer assembly 2 is installed inside the fan silencer body 1, a protection assembly 3 is installed at the input end of the silencer assembly 2, the silencer assembly 2 comprises: a resonator 21, a resistive sound absorbing ring 22, a resonance silencer 23, a glass wool integrated body 24, and a silencer perforated plate 25, the resonator 21 is installed on the side of the silencer assembly 2, the resistive sound absorbing ring 22 is installed at the front end of the resonator 21, the resonance silencer 23 is installed at the front end of the resistive sound absorbing ring 22, a connecting column 26 is fixedly installed at the front end of the resonance silencer 23, a glass wool integrated body 24 is provided at the front end of the connecting column 26, a sound receiving groove 27 is provided on the side of the resonator 21, and a silencer perforated plate 25 is installed at the front end of the glass wool integrated body 24.

[0026] It should be added that the core part of the fan silencer body 1 is the internal co-limited limited impedance composite wide-band silencer, which is composed of a resonator 21 and a resistive sound-absorbing ring 22 made of resistive sound-absorbing material. The cavity depth is 15 cm, the thickness is 25 mm, and the perforation rates are 0.6%, 1%, 12%, 6%, and 2%. The resonator 21 has a sound absorption coefficient of more than 0.7 in the frequency range of 125-400 Hz. The resonance silencer 23 is matched with a glass wool aggregate 24 (density 2skgm, and the surface is made of glass-finished steel plate mesh) to make the resonance silencer 23 have a sound absorption coefficient of more than 0.7 in the wide frequency range of 125-8000 Hz. At the same time, a silencer made of multiple co-limited limited impedance composite wide-band silencer structures is selected, and different combinations of plate thickness, perforation diameter, and different cavity depths behind the silencer perforated plate 25 are selected to obtain a good silencer effect in a wider frequency range.

[0027] As a preferred embodiment of the present embodiment, the protective component 3 includes: a mounting plate 1 31, a connecting inner cavity 33, a filter screen 34, and a mounting hole 35. The protective component 3 is fixedly mounted on the side of the protective component 3, a mounting end 36 is provided on the side of the protective component 3, a mounting plate 1 31 is mounted on the side of the mounting end 36, a mounting plate 2 32 is mounted on the front end of the mounting plate 1 31, a connecting inner cavity 33 is mounted below the mounting plate 2 32, a filter screen 34 is installed inside the connecting inner cavity 33, and a mounting hole 35 is provided at the front end of the connecting inner cavity 33.

[0028] It is worth mentioning that the mounting hole 35 is used to cooperate with the fan sound outlet cavity and docked to the fan muffler body 1. The mounting plate 1 31 and the mounting plate 2 32 fit into the interior of the protective component 3 to facilitate the transmission of sound. At the same time, a dust filter 34 is installed inside the fan connection cavity 33 to prevent dust from entering the interior of the muffler and causing problems that are difficult to clean.

[0029] As a preferred embodiment of the present invention, a protective outer wall 11 is installed at the rear end of the connecting inner cavity 33, and an outer wall anti-corrosion coating 13 is installed on the outer side of the protective outer wall 11. A front mounting seat 14 is installed on the right side of the protective outer wall 11, and a mounting baffle 15 is provided on the side of the front mounting seat 14. A limiting ring groove 12 is installed inside the protective outer wall 11, and a muffler inner cavity 18 is provided on the outer side of the limiting ring groove 12. A side baffle 17 is provided at the rear end of the muffler inner cavity 18, and a mounting base 16 is provided below the side baffle 17.

[0030] During specific use, the internal noise reduction assembly 2 is protected by the protective outer wall 11, and the outer wall anti-corrosion coating 13 increases the service life of the outer wall, thereby preventing the outer wall from being corroded, which would reduce the internal noise reduction efficiency.

[0031] The utility model is a kind of high-efficiency fan silencer. When in use, first, the core part of the fan silencer body 1 is the common limiting type limited resistance composite wide band silencer inside, which is composed of a resonator 21 and a resistive sound absorbing ring 22 of resistive sound absorbing material. The cavity depth is 15cm, the thickness is 25mm, and the perforation rate is 0.6%, 1%, 12%, 6%, and 2%. The sound absorption coefficient of the resonator 21 in the frequency range of 125-400HZ is above 0.7. The resonance silencer 23 is matched with a glass wool integrated body 24 (density 2skgm, the surface is made of glass wool steel plate mesh), so that the resonance silencer 23 is 125-8000Hz. The sound absorption coefficient is as high as 0.7 or more within the wide frequency range. At the same time, the silencer is made of multiple co-limited type limited resistance composite wide-band silencer structures. By selecting different combinations of plate thickness, perforation diameter, and different cavity depths behind the silencer perforated plate 25, a good silencer effect can be obtained within a wider frequency range. It is connected with the fan sound outlet cavity through the mounting hole 35 and docked to the fan silencer body 1. The mounting plate 1 31 and the mounting plate 2 32 fit into the protective component 3 to facilitate the transmission of sound. At the same time, a dust filter 34 is installed inside the fan connection cavity 33 to prevent dust from entering the silencer and causing problems that are difficult to clean.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. An efficient fan muffler, comprising a fan muffler body (1), characterized in that: A muffler assembly (2) is installed inside the fan muffler body (1); a protective assembly (3) is installed at the input end of the muffler assembly (2); the muffler assembly (2) comprises: a resonator (21), a resistive sound absorbing ring (22), a resonant muffler (23), a glass wool assembly (24), and a muffler perforated plate (25); a resonator (21) is installed on the side of the muffler assembly (2); a resistive sound absorbing ring (22) is installed at the front end of the resonator (21); a resonant muffler (23) is installed at the front end of the resistive sound absorbing ring (22); a connecting column (26) is fixedly installed at the front end of the resonant muffler (23); and a glass wool assembly (24) is provided at the front end of the connecting column (26).

2. A high-efficiency fan muffler as claimed in claim 1, characterized in that: A sound receiving groove (27) is provided on the side of the resonator (21), and a sound-absorbing perforated plate (25) is installed at the front end of the glass wool assembly (24).

3. A high-efficiency fan muffler as claimed in claim 1, characterized in that: The protection component (3) comprises: a mounting plate 1 (31), a connecting inner cavity (33), a filter screen (34), and a mounting hole (35); the side of the protection component (3) is fixedly mounted with the protection component (3); the side of the protection component (3) is provided with a mounting end (36); the side of the mounting end (36) is mounted with a mounting plate 1 (31); and the front end of the mounting plate 1 (31) is mounted with a mounting plate 2 (32).

4. A high-efficiency fan muffler as claimed in claim 3, characterized in that: A connecting inner cavity (33) is installed below the second mounting plate (32), a filter screen (34) is installed inside the connecting inner cavity (33), and a mounting hole (35) is opened at the front end of the connecting inner cavity (33).

5. A high-efficiency fan muffler as claimed in claim 4, characterized in that: A protective outer wall (11) is installed at the rear end of the connecting inner cavity (33), and an outer wall anti-corrosion coating (13) is installed on the outer side of the protective outer wall (11).

6. A high-efficiency fan muffler as claimed in claim 5, characterized in that: A front mounting seat (14) is installed on the right side of the protective outer wall (11), and a mounting baffle (15) is provided on the side of the front mounting seat (14).

7. A high-efficiency fan muffler as claimed in claim 6, characterized in that: A limiting ring groove (12) is installed inside the protective outer wall (11), a sound-absorbing inner cavity (18) is provided on the outer side of the limiting ring groove (12), a side baffle (17) is provided at the rear end of the sound-absorbing inner cavity (18), and a mounting base (16) is provided below the side baffle (17).

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