Fan resonant cavity noise reduction device

Abstract

The utility model relates to the technical field of noise reduction, and discloses a fan resonant cavity noise reduction device which comprises a resonant cavity body, a mounting frame is fixedly connected to the front side of the resonant cavity body, square grooves are formed in the top ends of the left side and the right side of the mounting frame, a mounting groove is formed in the inner side of the top end of the mounting frame, and a dust blocking plate is slidably connected to the inner side of the mounting groove. Mounting blocks are fixedly connected to the left side and the right side of the mounting frame, fixing shells are fixedly connected to the back sides of the two mounting blocks, clamping blocks are slidably connected to the inner sides of the fixing shells, fixing columns are fixedly connected to the back sides of the two clamping blocks, and connecting rods are fixedly connected to the other ends of the fixing columns. According to the utility model, the phenomenon that the resonant cavity is corroded after being covered by dust due to the fact that dust enters the resonant cavity is reduced, the dust on the surface of the dust blocking plate is convenient to clean, the utilization rate of the dust blocking plate is improved, the service life of the dust blocking plate is prolonged, and the dust blocking plate is convenient to flexibly disassemble and assemble, so that the dust blocking plate is convenient to replace, and the dust blocking effect of the dust blocking plate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of noise reduction, in particular to a fan resonance cavity noise reduction device. Background Art

[0002] The working principle of the fan resonance cavity is based on the interaction between the natural frequency of an object and the external excitation frequency. When the external excitation frequency is the same as or close to the natural frequency of the object, the object will absorb more energy and vibrate with a larger amplitude. This phenomenon is called resonance. The noise generated by the resonance cavity may cause discomfort to the surrounding environment and users, affecting people's normal work and life. Through noise reduction processing, the noise level can be reduced and the comfort of the environment can be improved.

[0003] After searching, the Chinese patent with publication number CN207647855U discloses a small fan resonance cavity noise reduction device. The more conventional practice is to customize and optimize the fan blades, lay sound-absorbing or sound-insulating materials inside the equipment, or change the internal flow resistance of the equipment. The above methods cannot directly and effectively control the fan noise source, so the noise suppression of the fan is achieved in a coordinated manner; it has strong environmental adaptability and is resistant to corrosion, high temperature, and strong impact; it is suitable for use in small spaces without changing the original installation method of the fan; it helps to improve the life of the fan. While reducing the fan noise, the device can effectively improve the wide-band noise reduction performance of the equipment, thereby adapting to the noise reduction needs of different frequency bands.

[0004] There are still some shortcomings in the use of the above-mentioned noise reduction device. When a resonance cavity is used at the air inlet of the fan, the wind along with dust and impurities in the air are usually sucked into the interior of the resonance cavity through the suction function of the fan. The resonance cavity usually has a weak effect in blocking dust and impurities, so after long-term use, the interior of the resonance cavity is easily covered with dust and impurities, causing the resonance cavity to be corroded by dust, thereby shortening its service life and increasing maintenance costs. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a fan resonance cavity noise reduction device.

[0006] The cam is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of cleaning brushes, each of which is provided with a plurality of cleaning brushes.

[0007] As a further description of the above technical solution:

[0008] A silencer pipe is fixedly connected to the rear side of the resonance cavity, silencer cotton is arranged on the inner side of the silencer pipe, a first air guide plate is fixedly connected to the inner side of the silencer pipe, anti-vibration rubber is arranged on the outer side of the resonance cavity, rubber-plastic cotton is arranged on the inner side of the resonance cavity, sound-absorbing cotton is arranged on the inner side of the rubber-plastic cotton, mineral wool is arranged on the inner side of the sound-absorbing cotton, and two second air guide plates are fixedly connected to the inner side of the resonance cavity.

[0009] As a further description of the above technical solution:

[0010] A handle is fixedly connected to the front side of the mounting plate, and the other end of the bidirectional screw rod is fixedly connected to the handle.

[0011] As a further description of the above technical solution:

[0012] The front side of the cleaning brush is fixedly connected with a plurality of inner shells, and the rear side of the mounting plate is fixedly connected with a plurality of outer shells.

[0013] As a further description of the above technical solution:

[0014] The outer side of the inner shell is slidably connected to the inner side of the outer shell, and the outer side of the spring 1 is arranged on the inner sides of the inner shell and the outer shell.

[0015] As a further description of the above technical solution:

[0016] The inner opposite sides of the two fixed shells are both fixedly connected with spring 2, and the other ends of the two spring 2 are both fixedly connected to the opposite sides of the two clamping blocks.

[0017] As a further description of the above technical solution:

[0018] The anti-vibration rubber is made of butyl rubber, and the sound-absorbing cotton is made of artificial inorganic fiber.

[0019] The utility model has the following beneficial effects:

[0020] 1. In the utility model, through the cooperation of the square groove, dust blocking plate, mounting block, fixing block, clamping block, fixing column, connecting rod, bidirectional screw rod, slide groove, mounting plate, spring and cleaning brush, the noise reduction device is provided with the function of blocking dust, which is beneficial to reduce the dust from entering into the resonance cavity, resulting in the phenomenon that the resonance cavity is covered with dust and then corroded, and is convenient for cleaning the dust on the surface of the dust blocking plate, improving the utilization rate of the dust blocking plate, extending the service life, and facilitating the flexible disassembly and assembly of the dust blocking plate, which is beneficial to the replacement of the dust blocking plate, improving the dust blocking effect of the dust blocking plate, and thus facilitating the extension of the service life of the resonance cavity.

[0021] 2. In the utility model, through the mutual cooperation of the silencer pipe, silencer cotton, the first air guide plate, vibration-absorbing rubber, rubber-plastic cotton, sound-absorbing cotton, mineral wool, and the second air guide plate, the noise reduction and silencing effect of the fan resonance chamber is enhanced, which is convenient for effectively reducing the noise level generated during the operation of the equipment, improving the stability of the equipment during operation, and helping to reduce the discomfort caused by the noise on the surrounding environment when the fan is used, thereby enhancing the comfort when using the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of the fan resonance cavity noise reduction device proposed by the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the dust blocking plate of the fan resonance cavity noise reduction device proposed by the utility model;

[0024] Figure 3 This is a schematic diagram of the installation frame structure of the fan resonance cavity noise reduction device proposed by the utility model;

[0025] Figure 4 This is a schematic diagram of the connecting rod structure of the fan resonance cavity noise reduction device proposed by the utility model;

[0026] Figure 5 This is a schematic diagram of the mounting plate structure of the fan resonance cavity noise reduction device proposed by the utility model;

[0027] Figure 6 This is a schematic diagram of the structure of the second air guide plate of the fan resonance cavity noise reduction device proposed by the utility model.

[0028] Legend:

[0029] 1. Resonance cavity; 2. Mounting frame; 3. Square groove; 4. Mounting groove; 5. Dust blocking plate; 6. Mounting block; 7. Fixed shell; 8. Block; 9. Fixed column; 10. Connecting rod; 11. Bidirectional screw rod; 12. Slide; 13. Mounting plate; 14. Spring one; 15. Cleaning brush; 16. Silencing duct; 17. Silencing cotton; 18. First air guide plate; 19. Anti-vibration glue; 20. Rubber and plastic cotton; 21. Sound-absorbing cotton; 22. Mineral wool; 23. Second air guide plate; 24. Handle; 25. Inner shell; 26. Outer shell; 27. Handle; 28. Spring two. DETAILED DESCRIPTION

[0030] 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.

[0031] Reference Figure 1-6 , the utility model provides an embodiment: a fan resonance cavity noise reduction device, including a resonance cavity 1, a mounting frame 2 is fixedly connected to the front side of the resonance cavity 1, square grooves 3 are arranged on the top of the left and right sides of the mounting frame 2, which are convenient for the clamping of the card block 8, and a mounting groove 4 is arranged on the inner side of the top of the mounting frame 2 for installing a dust blocking plate 5, and the inner side of the mounting groove 4 is slidably connected with the dust blocking plate 5 to block dust, and the left and right sides of the mounting frame 2 are fixedly connected with mounting blocks 6 for convenient installation of a fixed shell 7, and the opposite sides of the two mounting blocks 6 are fixedly connected with a fixed shell 7, and the inner side of the fixed shell 7 is slidably connected with a card block 8 for the movement of the card block 8, and the opposite sides of the two card blocks 8 are fixedly connected with a fixed column 9, and the other side of the fixed column 9 A connecting rod 10 is fixedly connected to one end to facilitate the movement of the block 8. A bidirectional screw rod 11 is rotatably connected to the front side of the top of the resonance cavity 1. Slide grooves 12 are provided on the left and right sides of the front end of the mounting frame 2 to facilitate the movement of the mounting plate 13. The inner sides of the two slide grooves 12 are slidably connected with a mounting plate 13 for installing a spring 14 and a housing 26. A plurality of springs 14 are fixedly connected to the rear side of the mounting plate 13. A cleaning brush 15 is fixedly connected to the other ends of the plurality of springs 14 to increase the elastic force of the cleaning brush 15 and improve the close fit between the cleaning brush 15 and the dust blocking plate 5. The other ends of the two connecting rods 10 are threadedly connected to the left and right sides of the bidirectional screw rod 11 to facilitate the bidirectional screw rod 11 to drive the two connecting rods 10 to move.

[0032] A silencer pipe 16 is fixedly connected to the rear side of the resonance cavity 1 to enhance the silencer effect. A silencer cotton 17 is arranged on the inner side of the silencer pipe 16 to facilitate silence when the wind reaches the silencer pipe 16. A first wind guide plate 18 is fixedly connected to the inner side of the silencer pipe 16 to facilitate guiding the wind. A shock-absorbing rubber 19 is arranged on the outer side of the resonance cavity 1 to help reduce vibration. A rubber and plastic cotton 20 is arranged on the inner side of the resonance cavity 1 to facilitate sound insulation. A sound-absorbing cotton 21 is arranged on the inner side of the rubber and plastic cotton 20 to enhance the sound absorption effect. Mineral wool 22, a porous material, is arranged on the inner side of the sound-absorbing cotton 21 to facilitate sound absorption. Two second wind guide plates 23 are fixedly connected to the inner side of the resonance cavity 1 to facilitate guiding the wind flow, thereby reducing the generation of eddy currents. A handle 24 is fixedly connected to the front side of the mounting plate 13 to facilitate pulling The mounting plate 13 and the other end of the bidirectional screw rod 11 are fixedly connected with a handle 27 to facilitate the rotation of the bidirectional screw rod 11. The front side of the cleaning brush 15 is fixedly connected with multiple inner shells 25, and the rear side of the mounting plate 13 is fixedly connected with multiple outer shells 26. The outer side of the inner shell 25 is slidably connected to the inner side of the outer shell 26, which improves the stability of the connection between the mounting plate 13 and the cleaning brush 15. The outer side of the spring 14 is arranged on the inner side of the inner shell 25 and the outer shell 26 to protect the spring 14. The inner opposite sides of the two fixed shells 7 are fixedly connected with springs 28, and the other ends of the two springs 28 are fixedly connected to the opposite sides of the two clamping blocks 8, which increases the elastic pushing effect on the clamping blocks 8, which is beneficial to improve the tightness of the clamping of the clamping blocks 8. The anti-vibration rubber 19 is made of butyl rubber, and the sound-absorbing cotton 21 is made of artificial inorganic fiber.

[0033] Working principle: When the fan is turned on and the resonance chamber is used, the wind is sucked in through the resonance chamber due to the suction function of the fan, and the impurities and dust accompanying the sucked wind are blocked by the dust blocking function of the dust blocking plate 5. When it is necessary to clean the dust on the air inlet surface of the dust blocking plate 5, pull the handle 24 so that the handle 24 drives the mounting plate 13 to slide on the inner side of the two slide grooves 12. When the mounting plate 13 slides, it is pushed to the cleaning brush 15 to clean the surface of the dust blocking plate 5 by the push of multiple springs 14. When the use time is When the dust blocking plate 5 needs to be replaced, the handle 27 is turned to make the handle 27 drive the bidirectional screw rod 11 to rotate, so that the bidirectional screw rod 11 drives the connecting rods 10 on both sides to move away from each other, thereby making the connecting rods 10 drive the corresponding fixing columns 9 to move away from each other, so that the fixing columns 9 can drive the block 8 to disengage from the inside of the engaged square groove 3 and slide into the inside of the fixed shell 7, thereby releasing the dust blocking plate 5, and then pulling the dust blocking plate 5 to remove the dust blocking plate 5. The steps are reversed during installation, which is conducive to reducing the entry of dust into the resonance. The inside of the cavity causes the resonance cavity to be covered with dust and then corroded, which is convenient for cleaning the dust on the surface of the dust blocking plate 5, improving the utilization rate of the dust blocking plate 5, extending the service life, and facilitating the flexible disassembly and assembly of the dust blocking plate 5, which is conducive to replacing the dust blocking plate 5 and improving the dust blocking effect of the dust blocking plate 5. When the resonance cavity is used for silencing, the wind force sucked in by the fan enters the interior of the resonance cavity 1 through the dust blocking plate 5, and is dispersed by the two second wind guide plates 23, reducing the phenomenon of wind force forming vortices, which is conducive to reducing noise, and then the noise generated when the wind force enters is absorbed by the mineral wool 22 and then further eliminated by the sound-absorbing cotton 21, and then transmitted to the inside of the rubber and plastic cotton 20, which is convenient for multi-layer sound absorption, thereby improving the sound absorption effect, and then the wind force is transmitted to the inside of the silencer pipe 16, and after being guided by the first wind guide plate 18, it is absorbed by the sound-absorbing cotton 17 on the inner wall of the pipe, thereby absorbing the noise again, which is convenient for effectively reducing the noise level generated during the operation of the equipment, improving the stability of the equipment during operation, and is conducive to reducing the discomfort caused by the noise when the fan is in use to the surrounding environment.

[0034] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fan resonance cavity noise reduction device, comprising a resonance cavity (1), characterized in that: The front side of the resonance cavity (1) is fixedly connected to a mounting frame (2), the top ends of both left and right sides of the mounting frame (2) are provided with square grooves (3), the inner side of the top end of the mounting frame (2) is provided with a mounting groove (4), the inner side of the mounting groove (4) is slidably connected to a dust blocking plate (5), the left and right sides of the mounting frame (2) are fixedly connected to mounting blocks (6), the opposite sides of the two mounting blocks (6) are fixedly connected to a fixed shell (7), the inner side of the fixed shell (7) is slidably connected to a clamping block (8), and the opposite sides of the two clamping blocks (8) are fixedly connected to a fixed column (9). The other end of the fixed column (9) is fixedly connected to a connecting rod (10), the front side of the top end of the resonance cavity (1) is rotatably connected to a bidirectional screw rod (11), the left and right sides of the front end of the mounting frame (2) are provided with sliding grooves (12), the inner sides of the two sliding grooves (12) are slidably connected to a mounting plate (13), the rear side of the mounting plate (13) is fixedly connected to a plurality of springs (14), the other ends of the plurality of springs (14) are fixedly connected to a cleaning brush (15), and the other ends of the two connecting rods (10) are threadedly connected to the left and right sides of the bidirectional screw rod (11).

2. The fan resonance cavity noise reduction device according to claim 1, characterized in that: A silencer pipe (16) is fixedly connected to the rear side of the resonance cavity (1), silencer cotton (17) is arranged on the inner side of the silencer pipe (16), a first air guide plate (18) is fixedly connected to the inner side of the silencer pipe (16), a vibration-damping rubber (19) is arranged on the outer side of the resonance cavity (1), rubber-plastic cotton (20) is arranged on the inner side of the resonance cavity (1), sound-absorbing cotton (21) is arranged on the inner side of the rubber-plastic cotton (20), mineral wool (22) is arranged on the inner side of the sound-absorbing cotton (21), and two second air guide plates (23) are fixedly connected to the inner side of the resonance cavity (1).

3. The fan resonance cavity noise reduction device according to claim 1, characterized in that: A handle (24) is fixedly connected to the front side of the mounting plate (13), and a handle (27) is fixedly connected to the other end of the bidirectional screw rod (11).

4. The fan resonance cavity noise reduction device according to claim 1, characterized in that: The front side of the cleaning brush (15) is fixedly connected to a plurality of inner shells (25), and the rear side of the mounting plate (13) is fixedly connected to a plurality of outer shells (26).

5. The fan resonance cavity noise reduction device according to claim 4, characterized in that: The outer side of the inner shell (25) is slidably connected to the inner side of the outer shell (26), and the outer side of the spring 1 (14) is arranged on the inner sides of the inner shell (25) and the outer shell (26).

6. The fan resonance cavity noise reduction device according to claim 1, characterized in that: Spring 2 (28) is fixedly connected to the opposite sides of the two fixed shells (7), and the other ends of the two springs (28) are fixedly connected to the opposite sides of the two clamping blocks (8).

7. The fan resonance cavity noise reduction device according to claim 2, characterized in that: The anti-vibration rubber (19) is made of butyl rubber, and the sound-absorbing cotton (21) is made of artificial inorganic fiber.

Images