Multidirectionally silenced blower

Abstract

A multidirectionally silenced blower, comprising a front panel silencer (1) and a rear panel silencer (2). A volute panel silencer (3) is arranged between the front panel silencer (1) and the rear panel silencer (2), and the front panel silencer (1), the rear panel silencer (2), and the volute panel silencer (3) define an air outlet channel; the rear panel silencer (2) is provided with a mounting port (21), the front panel silencer (1) is provided with an air inlet (111), and the mounting port (21) and the air inlet (111) are both connected to the air outlet channel; a driving member (4) is mounted on the rear panel silencer (2), and an impeller (41) is provided at an output end of the driving member (4) and is arranged in the air outlet channel; and the front panel silencer (1), the rear panel silencer (2), and the volute panel silencer (3) are connected by means of bolts.

Description

Multi-directional noise reduction fan TECHNICAL FIELD

[0001] The present application relates to the technical field of noise reduction fan, in particular to a multi-directional noise reduction fan. BACKGROUND

[0002] The fan is a kind of general equipment widely used in power, mine, machinery, metallurgy, chemical industry and other industries. It improves the gas pressure and sends the gas by inputting mechanical energy. The pressure gas flows rapidly in the fan shell and collides with the fan wall, which causes the fan to vibrate and produce a large amount of noise. The noise seriously affects the surrounding environment and causes harm to the physiology and psychology of people who live and work near the fan for a long time. In recent years, the government has put the control of noise environmental pollution in the industrial sector on the important agenda, and the production of high-quality environmental protection products is also an important embodiment of enterprise competitiveness.

[0003] In order to reduce the noise generated by the fan during operation, the existing fan adopts a noise reduction box structure for noise reduction. However, such fan has a large volume and is limited by the site. In addition, a noise reducer is installed at the air inlet and air outlet of the fan to reduce noise. However, noise still exists inside the fan during operation. SUMMARY

[0004] In order to improve the noise reduction effect of the fan, the present application provides a multi-directional noise reduction fan.

[0005] The multi-directional noise reduction fan provided by the present application adopts the following technical scheme:

[0006] A multi-directional noise reduction fan, comprising a front plate noise reduction body and a rear plate noise reduction body, a volute plate noise reduction body is arranged between the front plate noise reduction body and the rear plate noise reduction body, the front plate noise reduction body, the rear plate noise reduction body and the volute plate noise reduction body jointly form an air outlet channel, a mounting port is formed on the rear plate noise reduction body, an air inlet is formed on the front plate noise reduction body, the mounting port and the air inlet are connected with the air outlet channel, a driving member is installed on the rear plate noise reduction body, an impeller is arranged on the output end of the driving member, the impeller is arranged in the air outlet channel, and the front plate noise reduction body, the rear plate noise reduction body and the volute plate noise reduction body are connected by bolts.

[0007] By adopting the above technical scheme, the front plate noise reduction body, the rear plate noise reduction body and the volute plate noise reduction body are connected by bolts for easy disassembly and installation, which is convenient for maintenance. At the same time, the front plate noise reduction body, the rear plate noise reduction body and the volute plate noise reduction body form an air outlet channel with noise reduction effect. When the fan is working, noise reduction treatment is carried out from the inside of the fan, which improves the noise reduction effect of the fan.

[0008] Optionally, the front plate sound-absorbing body comprises a main plate, a front plate mesh plate and a first mesh plate fixing plate, the front plate mesh plate and the main plate are arranged in parallel on one side of the volute plate sound-absorbing body, the first mesh plate fixing plate is arranged on the side of the front plate mesh plate, the first mesh plate fixing plate, the front plate mesh plate and the main plate form a first filling cavity, and the first filling cavity is filled with sound-absorbing cotton for absorbing noise.

[0009] By filling the first filling cavity with the sound-absorbing cotton, the noise generated when the airflow enters the air outlet channel is absorbed by the sound-absorbing cotton in the first filling cavity, the noise reduction capacity of the fan body is increased, and the noise reduction effect is achieved.

[0010] Optionally, the volute plate sound-absorbing body comprises a volute plate, a volute mesh plate and a second mesh plate fixing plate, the volute mesh plate and the volute plate are arranged in parallel on the inner side of the volute plate, and the second mesh plate fixing plate is arranged on the side of the volute plate and the volute mesh plate, the second mesh plate fixing plate, the volute mesh plate and the volute plate form a second filling cavity, and the second filling cavity is also filled with sound-absorbing cotton.

[0011] By filling the second filling cavity with the sound-absorbing cotton, the side walls of the air outlet channel have the noise reduction function, and the noise reduction effect of the fan during operation is further improved.

[0012] Optionally, a plurality of supporting legs are arranged between the front plate sound-absorbing body and the rear plate sound-absorbing body, and the plurality of supporting legs are arranged near the corners of the front plate sound-absorbing body and the rear plate sound-absorbing body to support the front plate sound-absorbing body and the rear plate sound-absorbing body.

[0013] By arranging the supporting legs between the front plate sound-absorbing body and the rear plate sound-absorbing body, the front plate sound-absorbing body and the rear plate sound-absorbing body are supported by the supporting legs, the installation strength of the whole is improved, and the supporting legs are arranged at the corners of the front plate sound-absorbing body, so that the supporting legs do not interfere with the installation of the volute plate sound-absorbing body, and the air outlet is arranged in different directions.

[0014] Optionally, a shock-absorbing pad is arranged at the connection between the driving member and the main plate.

[0015] By arranging the shock-absorbing pad at the connection between the driving member and the main plate, the noise generated when the driving member works is reduced.

[0016] Optionally, a plurality of supporting ribs are arranged on the side of the volute plate sound-absorbing body, and the plurality of supporting ribs are arranged uniformly on the side of the volute plate sound-absorbing body to support the volute plate sound-absorbing body.

[0017] By arranging the supporting ribs on the side of the volute plate sound-absorbing body, the volute plate sound-absorbing body is supported by the supporting ribs, and the overall strength of the volute plate sound-absorbing body is improved.

[0018] Optionally, the support rib is arranged on the inner side wall of the volute plate, and the support rib is arranged in a direction perpendicular to the second mesh plate fixing plate; the second mesh plate fixing plate is provided with a sliding sleeve; the sliding sleeve is arranged in sliding mode outside a sliding rod; the sliding sleeve is arranged close to the outer side edge of the second mesh plate fixing plate; and the support rib and the sliding sleeve are provided with a plurality of support ribs and sliding sleeves in the length direction of the volute plate.

[0019] By adopting the above technical scheme, when replacement is needed, the second mesh plate fixing plate is slid through the sliding sleeve, the sound-absorbing cotton is removed, the new sound-absorbing cotton is placed on the sliding sleeve, and then the second mesh plate fixing plate is slid to the initial position, so that the sound-absorbing cotton is replaced.

[0020] Optionally, a plurality of fixing nails are arranged on the inner side of the sliding sleeve, and the fixing nails are inserted into the sound-absorbing cotton to fix the sound-absorbing cotton on the sliding sleeve.

[0021] By adopting the above technical scheme, the fixing nails are arranged on the sliding sleeve, so that when the sound-absorbing cotton is replaced, the sound-absorbing cotton is fixed on the sliding sleeve through the fixing nails, and the phenomenon that the sound-absorbing cotton is separated from the sliding sleeve during replacement is reduced.

[0022] Optionally, a plurality of auxiliary rods are arranged on the second mesh plate fixing plate, the auxiliary rods are arranged between every two adjacent sliding sleeves, the auxiliary rods are arranged close to the inner side edge of the second mesh plate fixing plate, the auxiliary rods are arranged in rotating mode on the second mesh plate fixing plate, and the auxiliary rods are rotated to abut against the side of the sound-absorbing cotton away from the sliding sleeve to fix the sound-absorbing cotton.

[0023] By adopting the above technical scheme, after the sound-absorbing cotton is placed on the sliding sleeve, the auxiliary rods are rotated to abut against the side of the sound-absorbing cotton, and the sound-absorbing cotton is supported in the shape corresponding to the second filling cavity through the auxiliary rods and the sliding sleeve, so that the sound-absorbing cotton is placed in the second filling cavity, and the replacement efficiency is improved.

[0024] Optionally, a rotating sleeve is arranged in rotating mode on the second mesh plate fixing plate, the auxiliary rod is arranged in penetrating mode through the rotating sleeve, a threaded portion is arranged at one end of the auxiliary rod close to the rotating sleeve, the auxiliary rod is connected in threaded mode with the rotating sleeve through the threaded portion, an auxiliary hole is arranged on the second mesh plate fixing plate, and the auxiliary rod is fixed in cooperation with the auxiliary hole.

[0025] By adopting the above technical scheme, after the auxiliary rod is rotated to abut against the sound-absorbing cotton, the end portion of the auxiliary rod corresponds to the auxiliary hole, then the auxiliary rod is rotated, the auxiliary rod moves relative to the rotating sleeve, and at the same time, the auxiliary rod is inserted into the auxiliary hole to fix the auxiliary rod, so that the stability of the auxiliary rod in fixing the sound-absorbing cotton is improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1 is a structural schematic diagram of a multi-orientation sound-attenuating fan according to an embodiment of the present application.

[0027] Fig. 2 is a structural view of the multi-orientation sound-attenuating fan in different installation orientations according to an embodiment of the present application.

[0028] Fig. 3 is an overall expanded view of the multi-orientation sound-attenuating fan according to an embodiment of the present application.

[0029] Fig. 4 is a structural view of a front plate sound-attenuating body of the multi-orientation sound-attenuating fan according to an embodiment of the present application.

[0030] Fig. 5 is a structural view of a volute plate sound-attenuating body of the multi-orientation sound-attenuating fan according to an embodiment of the present application.

[0031] Fig. 6 is a structural view of a second mesh plate fixing plate according to an embodiment of the present application.

[0032] Fig. 7 is a structural view of a sliding sleeve of the multi-orientation sound-attenuating fan according to an embodiment of the present application.

[0033] Fig. 8 is a structural view of an auxiliary rod of the multi-orientation sound-attenuating fan according to an embodiment of the present application.

[0034] Reference signs: 1, front plate sound-attenuating body; 11, main plate; 111, air inlet; 12, front plate mesh plate; 13, first mesh plate fixing plate; 2, rear plate sound-attenuating body; 21, installation port; 22, air inlet sleeve; 23, support leg; 3, volute plate sound-attenuating body; 31, volute plate; 32, volute mesh plate; 33, second mesh plate fixing plate; 4, driving member; 41, impeller; 5, support rib; 6, motor plate; 61, support tube; 7, shock-absorbing pad; 8, sliding sleeve; 81, fixing nail; 9, auxiliary rod; 91, rotating sleeve; 92, threaded portion; 93, auxiliary hole. DETAILED DESCRIPTION

[0035] The present application will be further described in detail below with reference to Figs. 1-8.

[0036] Embodiment I

[0037] The embodiment discloses a multi-directional silencing fan. Referring to FIG. 1 to FIG. 3, the multi-directional silencing fan comprises a front plate silencer 1 and a rear plate silencer 2 which are arranged at intervals, a volute plate silencer 3 is arranged between the front plate silencer 1 and the rear plate silencer 2, and the volute plate silencer 3 and the front plate silencer 1 and the rear plate silencer 2 jointly form an air outlet channel. An installation opening 21 is formed in the rear plate silencer 2, an air inlet 111 is formed in the front plate silencer 1, and the installation opening 21 and the air inlet 111 are both in communication with the inside of the air outlet channel. A driving member 4 is installed on the rear plate silencer 2, the driving member 4 can be an electric motor, an output end of the driving member 4 is arranged in the volute plate silencer 3 through the installation opening 21, an impeller 41 is arranged at the output end of the driving member 4, and the driving member 4 drives the impeller 41 to rotate to discharge gas through the air outlet channel. The volute plate silencer 3, the front plate silencer 1 and the rear plate silencer 2 are all connected by bolts, which facilitates installation, is compact in structure and saves cost.

[0038] Referring to FIG. 2 and FIG. 3, an air inlet sleeve 22 is installed at the air inlet 111, air outside the fan enters the air outlet channel through the air inlet sleeve 22, and in the embodiment, the air inlet sleeve 22 is a Venturi tube. The volute plate silencer 3 is connected to the front plate silencer 1 and the rear plate silencer 2 by bolts, the opening of the volute plate silencer 3 corresponds to one side of the front plate silencer 1, and when the fan is installed, the opening of the volute plate silencer 3 can be adjusted to face a specified direction according to installation requirements, and the installation position of the driving member 4 can be adjusted to adapt to different installation directions of air inlet and air outlet.

[0039] Referring to FIG. 3 and FIG. 4, the front plate silencer 1 and the rear plate silencer 2 are the same in structure, the front plate silencer 1 comprises a main plate 11, a front plate mesh plate 12 and a first mesh plate fixing plate 13, the front plate mesh plate 12 is arranged on one side of the main plate 11 close to the volute plate silencer 3, the front plate mesh plate 12 and the main plate 11 are arranged at intervals, the first mesh plate fixing plate 13 is arranged between the front plate mesh plate 12 and the main plate 11, and the first mesh plate fixing plate 13 is arranged on the side of the front plate mesh plate 12 to mount the front plate mesh plate 12 on the main plate 11, the main plate 11, the front plate mesh plate 12 and the first mesh plate fixing plate 13 are welded and fixed, a first filling cavity is formed between the three, and the first filling cavity is filled with sound-absorbing cotton, and in the embodiment, the sound-absorbing cotton is formed glass wool felt which is wrapped by plain weave alkali-free glass cloth outside. By filling the sound-absorbing cotton in the front plate silencer 1 and the rear plate silencer 2, the noise generated in the fan is treated, and the noise generated when the fan works is reduced.

[0040] Referring to FIG. 3 and FIG. 5, the volute plate sound-absorbing body 3 comprises a volute plate 31, a volute mesh plate 32 and a second mesh plate fixing plate 33, the volute plate 31 is arranged in a volute shape, the volute mesh plate 32 is arranged on the inner side of the volute plate 31, and the volute mesh plate 32 and the inner wall of the volute plate 31 are arranged at intervals, the second mesh plate fixing plate 33 is fixedly arranged on both sides of the volute plate 31 and the volute mesh plate 32 by welding, and the volute plate 31, the volute mesh plate 32 and the second mesh plate fixing plate 33 form a second filling cavity, which is also filled with sound-absorbing cotton. The sound-absorbing cotton in the volute plate sound-absorbing body 3, the front plate sound-absorbing body 1 and the rear plate sound-absorbing body 2 is the same as the sound-absorbing cotton in the first filling cavity. When the fan is working, the noise generated by the airflow entering the air outlet channel is absorbed by the sound-absorbing cotton, thereby increasing the noise reduction capacity of the fan body. The volute plate sound-absorbing body 3 is provided with a plurality of support ribs 5, which are uniformly arranged on the volute plate sound-absorbing body 3. The support ribs 5 are used to support the volute plate sound-absorbing body 3 and improve the overall strength of the volute plate sound-absorbing body 3.

[0041] Referring to FIG. 2 and FIG. 3, a plurality of support feet 23 are arranged between the front plate sound-absorbing body 1 and the rear plate sound-absorbing body 2, and the plurality of support feet 23 are uniformly and intervaliy arranged between the front plate sound-absorbing body 1 and the rear plate sound-absorbing body 2. In the embodiment, four support feet 23 are arranged, and the four support feet 23 are arranged near the corners of the front plate sound-absorbing body 1 and the rear plate sound-absorbing body 2, respectively. The support feet 23 are connected to the front plate sound-absorbing body 1 and the rear plate sound-absorbing body 2 by bolts. The support feet 23 support the front plate sound-absorbing body 1 and the rear plate sound-absorbing body 2, thereby improving the overall structural strength of the fan body. Meanwhile, the support feet 23 are arranged at the corners of the front plate sound-absorbing body 1 and the rear plate sound-absorbing body 2, which can meet the installation requirements of the fan in different air outlet directions and has strong versatility.

[0042] Referring to FIG. 2 and FIG. 3, a motor plate 6 is installed on the main plate 11, and a plurality of support tubes 61 are uniformly arranged on the motor plate 6. The support tubes 61 and the motor plate 6 cooperate to support the motor plate 6 and increase the strength of the motor plate 6. The driving member 4 and the main plate 11 are fixedly connected by a flange and bolts, and a shock-absorbing pad 7 is arranged at the connection between the driving member 4 and the main plate 11. In the embodiment, the shock-absorbing pad 7 is made of rubber. The shock-absorbing pad 7 is arranged between the driving member 4 and the main plate 11 to reduce the noise generated by the driving member 4 during operation, thereby further improving the overall noise reduction effect of the fan body.

[0043] The implementation principle of the present application is that the front plate sound absorber 1, the rear plate sound absorber 2 and the volute plate sound absorber 3 are connected by bolts, which is simple in structure, low in maintenance cost, and convenient for adjusting and fixing along different air outlet directions according to the use requirements. Meanwhile, the front plate sound absorber 1, the rear plate sound absorber 2 and the volute plate sound absorber 3 are filled with sound-absorbing cotton to realize noise reduction from the inside of the fan body. In addition, a damping pad 7 is arranged at the installation position of the driving member 4 to reduce the noise of the driving member 4 and reduce the overall noise of the fan body during work, which has strong versatility.

[0044] Embodiment two

[0045] The sound-absorbing cotton in the second filling cavity is arranged in a volute shape corresponding to the second filling cavity. After the sound-absorbing cotton is used for a period of time, dust and other impurities in the air will adhere to the sound-absorbing cotton, affecting the noise reduction effect of the sound-absorbing cotton. Since the shape of the second filling cavity is not convenient for disassembling and replacing the sound-absorbing cotton, in order to facilitate the replacement of the sound-absorbing cotton in the second filling cavity, a multi-directional sound-absorbing fan is disclosed in the present embodiment, as shown in FIGS. 6 and 7. The difference from the first embodiment is that the second mesh plate fixing plate 33 on one side of the volute plate 31 is connected to the volute plate sound absorber 3 by bolts. The support rib 5 is arranged on the inner side wall of the volute plate 31, that is, the support rib 5 is arranged in the second filling cavity. The support rib 5 is arranged in a direction perpendicular to the second mesh plate fixing plate 33. The sliding sleeve 8 is arranged on the second mesh plate fixing plate 33. The sliding sleeve 8 is arranged along the length direction of the support rib 5 and is slidably arranged outside the sliding rod. The sliding sleeve 8 is arranged close to the outer side edge of the second mesh plate fixing plate 33. The support rib 5 and the sliding sleeve 8 are arranged in multiple intervals along the length direction of the volute plate 31. The sliding sleeve 8 is used to fix the sound-absorbing cotton.

[0046] When replacement is needed, the sliding sliding sleeve 8 separates the second mesh plate fixing plate 33 from the volute plate 31, then the sound-absorbing cotton is taken out from the second filling cavity, then the sound-absorbing cotton to be replaced is placed on the inner side of the sliding sleeve 8, the sound-absorbing cotton is bent to the shape corresponding to the second filling cavity by the multiple sliding sleeves 8, then the second mesh plate fixing plate 33 is slid to the initial position, and the sound-absorbing cotton is brought into the second filling cavity, completing the replacement of the sound-absorbing cotton.

[0047] Referring to FIGS. 7 and 8, in order to facilitate the replacement of the sound-absorbing cotton, multiple fixing nails 81 are arranged on the inner side of the sliding sleeve 8. The fixing nails 81 are arranged in intervals along the length direction of the sliding sleeve 8. When the sound-absorbing cotton is placed on the inner side of the sliding sleeve 8, the fixing nails 81 are inserted into the sound-absorbing cotton to fix the sound-absorbing cotton, reducing the phenomenon of falling off or deviation of the sound-absorbing cotton and the sliding sleeve 8, so that the sound-absorbing cotton enters the second filling cavity with the sliding sleeve 8.

[0048] Referring to FIGS. 7 and 8, the second mesh plate fixing plate 33 is provided with auxiliary rods 9, the auxiliary rods 9 are provided in plurality, and the auxiliary rods 9 are arranged between every two adjacent sliding sleeves 8, the auxiliary rods 9 are arranged close to the inner side of the second mesh plate fixing plate 33, and the auxiliary rods 9 and the sliding sleeves 8 are arranged in parallel and at intervals. The auxiliary rods 9 are arranged rotatably on the second mesh plate fixing plate 33, after the sound-absorbing cotton is placed on the sliding sleeves 8, the auxiliary rods 9 are rotated to abut against the side of the sound-absorbing cotton away from the sliding sleeves 8, the sound-absorbing cotton is fixed, and at the same time, the sound-absorbing cotton is supported to form a shape corresponding to the second filling cavity under the action of the auxiliary rods 9, so as to place the sound-absorbing cotton in the second filling cavity.

[0049] Referring to FIGS. 7 and 8, the second mesh plate fixing plate 33 is provided with a rotating sleeve 91 arranged rotatably, the auxiliary rods 9 pass through the rotating sleeve 91, one end of the auxiliary rods 9 close to the rotating sleeve 91 is provided with a threaded portion 92, the auxiliary rods 9 are connected to the rotating sleeve 91 in threaded fit through the threaded portion 92, and the second mesh plate fixing plate 33 is provided with an auxiliary hole 93. After the auxiliary rods 9 completely abut against the sound-absorbing cotton, the end of the auxiliary rods 9 corresponds to the auxiliary hole 93. Then the auxiliary rods 9 are rotated, and the end of the auxiliary rods 9 is gradually inserted into the auxiliary hole 93 under the action of the threaded portion 92, so as to fix the auxiliary rods 9.

[0050] The implementation principle of the application is that when the sound-absorbing cotton in the second filling cavity needs to be replaced, the sound-absorbing cotton is taken off after the sliding sleeve 8 is pulled out, then the new sound-absorbing cotton is fixed on the sliding sleeve 8 through the fixing nails 81, and then the auxiliary rods 9 are rotated to abut against the side surface of the sound-absorbing cotton, so as to fix the sound-absorbing cotton and support the sound-absorbing cotton to form a shape corresponding to the second filling cavity, so as to place the sound-absorbing cotton in the second filling cavity for replacement.

[0051] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: equivalent changes made according to the structure, shape and principle of the application should be covered in the protection scope of the application.

Claims

1. A multidirectional sound attenuating fan characterized by: The application relates to a front plate silencer (1) and a rear plate silencer (2), a volute plate silencer (3) is arranged between the front plate silencer (1) and the rear plate silencer (2), the front plate silencer (1), the rear plate silencer (2) and the volute plate silencer (3) jointly form an air outlet channel, a mounting port (21) is arranged on the rear plate silencer (2), an air inlet (111) is arranged on the front plate silencer (1), the mounting port (21) and the air inlet (111) are connected with the air outlet channel, a driving element (4) is arranged on the rear plate silencer (2), an impeller (41) is arranged on the output end of the driving element (4), the impeller (41) is arranged in the air outlet channel, and the front plate silencer (1), the rear plate silencer (2) and the volute plate silencer (3) are connected through bolts.

2. The multidirectional sound attenuation fan of claim 1, wherein: The front plate silencer (1) comprises a main plate (11), a front plate mesh plate (12) and a first mesh plate fixing plate (13), the front plate mesh plate (12) and the main plate (11) are arranged at intervals on the side close to the volute plate silencer (3), the first mesh plate fixing plate (13) is arranged on the side of the front plate mesh plate (12), the first mesh plate fixing plate (13), the front plate mesh plate (12) and the main plate (11) jointly form a first filling cavity, and the first filling cavity is filled with silencing cotton for eliminating noise, and the rear plate silencer (2) and the front plate silencer (1) are of the same structure.

3. The multidirectional sound attenuation fan of claim 2, wherein: The volute plate silencer (3) comprises a volute plate (31), a volute mesh plate (32) and a second mesh plate fixing plate (33), the volute mesh plate (32) and the inner side of the volute plate (31) are arranged at intervals, the second mesh plate fixing plate (33) is arranged on the side of the volute plate (31) and the volute mesh plate (32), the second mesh plate fixing plate (33), the volute mesh plate (32) and the volute plate (31) jointly form a second filling cavity, and the second filling cavity is also filled with silencing cotton.

4. The multidirectional sound attenuation fan of claim 3, wherein: A plurality of supporting legs (23) are arranged between the front plate silencer (1) and the rear plate silencer (2), and the supporting legs (23) are arranged close to the corners of the front plate silencer (1) and the rear plate silencer (2) respectively to support the front plate silencer (1) and the rear plate silencer (2).

5. The multidirectional sound attenuation fan of claim 1, wherein: A damping pad (7) is arranged at the connecting position of the driving element (4) and the main plate (11).

6. The multidirectional sound attenuation fan of claim 3, wherein: A plurality of supporting ribs (5) are arranged on the side of the volute plate silencer (3), and the supporting ribs (5) are uniformly arranged on the side of the volute plate silencer (3) to support the volute plate silencer (3).

7. The multidirectional sound attenuation fan of claim 6, wherein: The supporting ribs (5) are arranged on the inner side wall of the volute plate (31), the supporting ribs (5) are arranged in the direction perpendicular to the second mesh plate fixing plate (33), a sliding sleeve (8) is arranged on the second mesh plate fixing plate (33), the sliding sleeve (8) is arranged to slide on the outside of a sliding rod, the sliding sleeve (8) is arranged close to the outer side edge of the second mesh plate fixing plate (33), and a plurality of supporting ribs (5) and sliding sleeves (8) are arranged along the length direction of the volute plate (31).

8. The multidirectional sound attenuation fan of claim 7, wherein: The inner side of the sliding sleeve (8) is provided with a plurality of fixing nails (81) which are inserted into the sound-absorbing cotton to fix the sound-absorbing cotton on the sliding sleeve (8).

9. The multidirectional sound attenuation fan of claim 8, wherein: The second mesh plate fixing plate (33) is provided with a plurality of auxiliary rods (9) which are arranged between every two adjacent sliding sleeves (8), and the auxiliary rods (9) are arranged close to the inner side edges of the second mesh plate fixing plate (33), and the auxiliary rods (9) are rotationally arranged on the second mesh plate fixing plate (33), and the auxiliary rods (9) are abutted against the side of the sound-absorbing cotton which is away from the sliding sleeve (8) to fix the sound-absorbing cotton.

10. The multidirectional sound attenuation fan of claim 9, wherein: The second mesh plate fixing plate (33) is rotationally provided with a rotating sleeve (91), the auxiliary rod (9) penetrates through the rotating sleeve (91), one end of the auxiliary rod (9) close to the rotating sleeve (91) is provided with a threaded portion (92), the auxiliary rod (9) is connected with the rotating sleeve (91) through the threaded connection of the threaded portion (92) and the rotating sleeve (91), and the second mesh plate fixing plate (33) is provided with an auxiliary hole (93), and the auxiliary rod (9) and the auxiliary hole (93) are matched to fix the auxiliary rod (9).

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