Noise reduction mechanism for fan

Abstract

The utility model relates to the technical field of noise reduction, and discloses a noise reduction mechanism for a fan, which comprises the fan, the left end of the fan is in threaded connection with a plurality of first bolts, the left sides of the outer walls of the first bolts are in threaded connection with an air inlet pipe, and the air inlet pipe is in threaded connection with the fan through the first bolts. The left end of the air inlet pipe is in threaded connection with a plurality of second bolts, the inner wall of the air inlet pipe is fixedly connected with a high-temperature-resistant sponge mat, a plurality of silencing holes are formed in the inner wall of the high-temperature-resistant sponge mat, the left side of the inner wall of the high-temperature-resistant sponge mat is fixedly connected with a flow dividing frame, and the right end of the fan is in threaded connection with a plurality of third bolts. The right side of the outer wall of the third bolt is in threaded connection with an exhaust pipe. According to the utility model, noise sound waves are reflected and scattered through the silencing plate, and the noise is transmitted to the silencing cotton for silencing treatment, so that the noise is reduced, and the problem that high-frequency noise cannot be effectively reduced is solved.

Description

Technical Field

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

[0002] Fans are widely used in people's lives and come in a variety of types. However, the currently used fans generally have poor noise reduction effects, which leads to serious noise pollution during the operation of the fans and causes great harm to the staff. Therefore, a noise reduction mechanism for a fan is needed.

[0003] The fan noise reduction mechanism is a combination of a series of devices and measures designed to reduce the noise generated during the operation of the fan. By converting sound energy into heat energy after friction at the air outlet, the fan is noise-reduced, effectively reducing noise.

[0004] The currently common fan noise reduction mechanism is mainly composed of sound insulation cotton, which directly wraps the sound insulation cotton around the fan. The sound insulation cotton absorbs the noise generated by the fan during operation. However, this device is only suitable for reducing low-frequency noise and cannot effectively reduce noise when encountering high-frequency noise, reducing the practicality of the device. Summary of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides a noise reduction mechanism for a fan, aiming to improve the problem that the fan noise reduction mechanism in the prior art cannot reduce high-frequency noise.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: A noise reduction mechanism for a fan, including a fan, a plurality of bolts one are threadedly connected to the left end of the fan, an air inlet pipe is arranged on the left side of the fan, the air inlet pipe is threadedly connected to the fan through the bolts one, a plurality of bolts two are threadedly connected to the left end of the air inlet pipe, a high-temperature resistant sponge pad is fixedly connected to the inner wall of the air inlet pipe, a plurality of sound absorption holes are opened in the inner wall of the high-temperature resistant sponge pad, a flow dividing frame is fixedly connected to the left side of the inner wall of the high-temperature resistant sponge pad, a plurality of bolts three are threadedly connected to the right end of the fan, a discharge air pipe is threadedly connected to the right side of the outer wall of the bolts three, a groove is opened in the inner wall of the discharge air pipe, a sound absorption cotton is fixedly connected to the inside of the groove, a sound absorption plate is fixedly connected to the inner wall of the sound absorption cotton, a plurality of flow guiding plates are fixedly connected to the inner wall of the sound absorption plate, a buffer pad is fixedly connected to the bottom of the outer wall of the discharge air pipe, a support frame is fixedly connected to the bottom of the outer wall of the buffer pad, and an adjusting mechanism is arranged on the outer wall of the air inlet pipe, and the adjusting mechanism is used to adjust the height of the air inlet pipe.

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

[0008] The adjusting mechanism includes a rubber pad, which is fixedly connected to the right outer wall of the air inlet pipe. A fixing ring is fixedly connected to the outer wall of the rubber pad. A support rod is fixedly connected to the bottom of the outer wall of the fixing ring. The right end of the support rod is fixedly connected to a stress block. A limiting block is rotatably connected to the bottom of the stress block. A threaded rod is fixedly connected to the bottom of the limiting block. A handle is fixedly connected to the upper part of the outer wall of the threaded rod. A threaded sleeve is threadedly connected to the bottom of the outer wall of the threaded rod. Fixing blocks are fixedly connected to the four peripheries of the bottom of the threaded sleeve. The bottoms of the plurality of fixing blocks are fixedly connected to a base.

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

[0010] A temperature sensor is fixedly connected to the front side of the outer wall of the fan, and a display screen is fixedly connected to the front side of the outer wall of the temperature sensor.

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

[0012] A sealing gasket is arranged on the left side of the outer wall of the air inlet pipe, and the sealing gasket is threadedly connected to the air inlet pipe through the second bolt.

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

[0014] Load-bearing blocks are fixedly connected to the front and rear sides of the outer walls of the air inlet pipe and the exhaust pipe, and a reserved hole is opened in the middle of the outer wall of the load-bearing block.

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

[0016] Positioning holes are opened in the outer walls of the handle and the threaded rod, and a rotating rod is slidably connected to the inner wall of the positioning hole.

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

[0018] A hollow box is fixedly connected to the front side of the outer wall of the support frame, and baffles are fixedly connected to the left and right sides of the inner wall of the hollow box.

[0019] As a further description of the above technical solution:

[0020] An inclined plate one is fixedly connected to the front and rear sides inside the support frame, an inclined plate two is fixedly connected to the outer wall of the inclined plate one, and the inclined plate two is fixedly connected to the support frame.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the present utility model, the air flow is shunted by the shunt frame, the high-temperature resistant sponge absorbs the noise in the air inlet pipe, the air flow in the exhaust pipe is shunted by the guide plate to reduce the turbulence and eddy current of the air flow, and the aerodynamic noise is reduced. The noise sound wave is reflected and scattered by the sound absorption plate, and the noise is transmitted to the sound absorption cotton for sound absorption treatment, so as to reduce the noise, solve the problem that the high-frequency noise cannot be effectively reduced, and improve the practicability of the device.

[0023] 2. In the present utility model, the height of the threaded rod is adjusted by rotating the handle, and then the support rod is driven to move upward. The upward movement of the support rod drives the fixed ring and the rubber pad to move upward. When the fixed ring and the rubber pad move to a suitable position, the air inlet pipe is fixed, so as to reduce the friction and vibration transmission between the air inlet pipe and other components. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a perspective view of a noise reduction mechanism for a fan proposed by the present utility model;

[0025] Figure 2 is a front view of a noise reduction mechanism for a fan proposed by the present utility model;

[0026] Figure 3 is a sectional view of a noise reduction mechanism for a fan proposed by the present utility model;

[0027] Figure 4 is an exploded view of a noise reduction mechanism for a fan proposed by the present utility model;

[0028] Figure 5 is a schematic diagram of an adjustment mechanism of a noise reduction mechanism for a fan proposed by the present utility model;

[0029] Figure 6 is a partial structure display diagram of a noise reduction mechanism for a fan proposed by the present utility model;

[0030] Figure 7 is a partial structure schematic diagram of a noise reduction mechanism for a fan proposed by the present utility model;

[0031] Figure 8 is an enlarged view of part A of a noise reduction mechanism for a fan proposed by the present utility model.

[0032] Legend:

[0033] 1. Fan; 2. Adjusting mechanism; 201. Rubber pad; 202. Fixed ring; 203. Support rod; 204. Force-receiving block; 205. Limit block; 206. Threaded rod; 207. Handle; 208. Threaded sleeve; 209. Fixed block; 210. Base; 3. Air inlet pipe; 4. Bolt II; 5. High-temperature sponge pad; 6. Flow splitting frame; 7. Exhaust pipe; 8. Groove; 9. Sound-absorbing cotton; 10. Sound insulation board; 11. Deflector; 12. Buffer pad; 13. Support frame; 14. Bolt III; 15. Temperature sensor; 16. Display screen; 17. Sealing gasket; 18. Load-bearing block; 19. Reserved hole; 20. Hollow box; 21. Baffle; 22. Inclined plate I; 23. Positioning hole; 24. Rotating rod; 25. Bolt I; 26. Sound insulation hole; 27. Inclined plate II. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Referring to Figure 1 , Figure 3 and Figure 4 , an embodiment provided by the present invention: a noise reduction mechanism for a fan, including a fan 1, the left end of the fan 1 is threadedly connected with a plurality of bolts I 25, the left side of the fan 1 is provided with an air inlet pipe 3, the air inlet pipe 3 is threadedly connected with the fan 1 through the bolts I 25, the left end of the air inlet pipe 3 is threadedly connected with a plurality of bolts II 4, the inner wall of the air inlet pipe 3 is fixedly connected with a high-temperature sponge pad 5, a plurality of sound insulation holes 26 are opened in the inner wall of the high-temperature sponge pad 5, the left side of the inner wall of the high-temperature sponge pad 5 is fixedly connected with a flow splitting frame 6, the right end of the fan 1 is threadedly connected with a plurality of bolts III 14, the right side of the outer wall of the bolts III 14 is threadedly connected with an exhaust pipe 7, a groove 8 is opened in the inner wall of the exhaust pipe 7, a sound-absorbing cotton 9 is fixedly connected to the inside of the groove 8, a sound insulation board 10 is fixedly connected to the inner wall of the sound-absorbing cotton 9, a plurality of deflectors 11 are fixedly connected to the inner wall of the sound insulation board 10, a buffer pad 12 is fixedly connected to the bottom of the outer wall of the exhaust pipe 7, a support frame 13 is fixedly connected to the bottom of the outer wall of the buffer pad 12, an adjusting mechanism 2 is arranged on the outer wall of the air inlet pipe 3, and the adjusting mechanism 2 is used to adjust the height of the air inlet pipe 3; a sealing gasket 17 is arranged on the left side of the outer wall of the air inlet pipe 3, and the sealing gasket 17 is threadedly connected with the air inlet pipe 3 through the bolts II 4; load-bearing blocks 18 are fixedly connected to the front and rear sides of the outer walls of the air inlet pipe 3 and the exhaust pipe 7, and a reserved hole 19 is opened in the middle of the outer wall of the load-bearing block 18;

[0036] Specifically, air enters from the air inlet pipe 3. When the air carries noise through, the noise sound wave enters the pores of the high-temperature resistant sponge pad 5. Due to the friction and viscous resistance between the fibers inside the high-temperature resistant sponge pad 5 and air molecules, part of the sound energy is converted into heat energy and consumed, thereby reducing the intensity of the noise. The multiple sound absorption holes 26 opened on the inner wall of the high-temperature resistant sponge pad 5 further enhance the sound absorption effect. After the noise sound wave enters the sound absorption holes 26, it will continuously reflect and refract inside the sound absorption holes 26, increasing the contact area and action time between the sound wave and the high-temperature resistant sponge pad 5, so that more sound energy is absorbed. The air enters the exhaust pipe 7 after being discharged from the fan 1. The flow guide plate 11 can, on the one hand, guide the air flow to be discharged more smoothly, reduce the turbulence and eddy current of the air flow, reduce the aerodynamic noise, and further reduce the propagation of the noise. The sound absorption plate 10 can reflect and scatter the noise sound wave, making the sound wave continuously reflect and interfere inside the sound absorption plate 10, and finally transmit the noise to the sound absorption cotton 9 to be absorbed. The buffer pad 12 can reduce the vibration generated during the operation of the fan 1 from being transmitted to the support frame 13 and the surrounding environment. By absorbing the vibration energy, the buffer pad 12 reduces the structural noise generated by the vibration; the sealing pad 17 can tightly connect the external pipeline with the air inlet pipe 3; when the device needs to be moved, the rope can be passed through the reserved hole 19 and fixed on the load-bearing block 18 for lifting.

[0037] Refer to Figure 1 、 Figure 3 and Figure 4 As shown in FIGS.

[0038] Specifically, fix the base 210 to the ground, insert the rotating rod 24 into the positioning hole 23, rotate the rotating rod 24 counterclockwise to drive the handle 207 to rotate, the rotation of the handle 207 drives the threaded rod 206 to rotate, while rotating, the threaded rod 206 moves upward, the upward movement of the threaded rod 206 drives the limiting block 205 to rotate and move upward, the upward movement of the limiting block 205 drives the stress block 204 and the support rod 203 to move upward, and while the support rod 203 moves upward, it drives the fixing ring 202 and the rubber pad 201 on its inner wall to move upward. When the air inlet pipe 3 on the inner wall of the rubber pad 201 is at the same height as the blower 1, the air inlet pipe 3 can be fixed to the blower 1.

[0039] Refer to Figure 1 and Figure 6 As shown in FIGS. Figure 1 and Figure 6 , a hollow box 20 is fixedly connected to the front side of the outer wall of the support frame 13, and baffles 21 are fixedly connected to the left and right sides of the inner wall of the hollow box 20; a first inclined plate 22 is fixedly connected to the front and rear sides inside the support frame 13, an outer wall of the first inclined plate 22 is fixedly connected to a second inclined plate 27, and the second inclined plate 27 is fixedly connected to the support frame 13.

[0040] Specifically, the interior of the hollow box 20 is partitioned by the baffle 21 and can hold maintenance tools; the first inclined plate 22 and the second inclined plate 27 reinforce the support frame 13.

[0041] Refer to Figure 1 and Figure 7 As shown in FIGS. Figure 1 and Figure 7 , a temperature sensor 15 is fixedly connected to the front side of the outer wall of the blower 1, and a display screen 16 is fixedly connected to the front side of the outer wall of the temperature sensor 15.

[0042] Specifically, the temperature sensor 15 can detect the temperature of the blower 1, and the display screen 16 facilitates directly observing the value of the temperature sensor 15 to prevent the blower 1 from operating overloaded.

[0043] Working principle: Before using this device, start the blower 1. When air carries noise through the air inlet pipe 3, the noise sound wave enters the sound absorption holes 26 inside the high-temperature resistant sponge pad 5. Due to the friction and viscous resistance between the fibers inside the high-temperature resistant sponge pad 5 and air molecules, part of the sound energy is converted into heat energy and consumed, thereby reducing the intensity of the noise. After the air enters the exhaust pipe 7, it is first shunted by the guide plate 11 to avoid strong noise generated by the concentrated impact of the air flow. The sound absorption plate 10 can reflect and scatter the noise sound wave, causing the sound wave to continuously reflect and interfere inside the sound absorption plate 10, thereby consuming the sound energy and finally transmitting the noise to the sound absorption cotton 9, and the sound absorption cotton 9 absorbs the weakened noise.

[0044] Fix the base 210 on the ground. Insert the rotating rod 24 into the positioning hole 23. Rotate the rotating rod 24 counterclockwise. As the rotating rod 24 rotates, it drives the handle 207 and the threaded rod 206 to rotate and move upward. The upward movement of the threaded rod 206 drives the limiting block 205 to move upward. While the limiting block 205 moves upward, it drives the support rod 203 and the stress block 204 to move upward and lift the fixing ring 202. When the air inlet pipe 3 on the inner wall of the rubber pad 201 is at the same height as the blower 1, the air inlet pipe 3 can be fixed to the blower 1. The rubber pad 201 can reduce the vibration transmission between machines.

[0045] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention 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 perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A noise reduction mechanism for a fan, comprising a fan (1), characterized in that: The left end of the fan (1) is threadedly connected with a plurality of bolts (25), an air inlet pipe (3) is arranged on the left side of the fan (1), the air inlet pipe (3) is threadedly connected to the fan (1) via the bolts (25), the left end of the air inlet pipe (3) is threadedly connected with a plurality of bolts (4), the inner wall of the air inlet pipe (3) is fixedly connected with a high temperature resistant sponge pad (5), the inner wall of the high temperature resistant sponge pad (5) is provided with a plurality of silencer holes (26), the inner wall of the high temperature resistant sponge pad (5) is fixedly connected with a diverter frame (6), the right end of the fan (1) is threadedly connected with a plurality of bolts (14), the bolts (15) are connected to the fan (1) and the air inlet pipe (3) is threadedly connected with a plurality of bolts (26). The right side of the outer wall of the exhaust pipe (14) is threadedly connected to an exhaust pipe (7), the inner wall of the exhaust pipe (7) is provided with a groove (8), the interior of the groove (8) is fixedly connected with a silencer cotton (9), the inner wall of the silencer cotton (9) is fixedly connected with a silencer plate (10), the inner wall of the silencer plate (10) is fixedly connected with a plurality of guide plates (11), the bottom of the outer wall of the exhaust pipe (7) is fixedly connected with a buffer pad (12), the bottom of the outer wall of the buffer pad (12) is fixedly connected with a support frame (13), and the outer wall of the air inlet pipe (3) is provided with an adjustment mechanism (2), and the adjustment mechanism (2) is used to adjust the height of the air inlet pipe (3).

2. A noise reduction mechanism for a fan according to claim 1, characterized in that: The adjustment mechanism (2) comprises a rubber pad (201), wherein the rubber pad (201) is fixedly connected to the right side of the outer wall of the air inlet pipe (3), the outer wall of the rubber pad (201) is fixedly connected to a fixing ring (202), the bottom of the outer wall of the fixing ring (202) is fixedly connected to a support rod (203), the right end of the support rod (203) is fixedly connected to a force block (204), the bottom of the force block (204) is rotatably connected to a limit block (205), the bottom of the limit block (205) is fixedly connected to a threaded rod (206), the upper part of the outer wall of the threaded rod (206) is fixedly connected to a handle (207), the bottom of the outer wall of the threaded rod (206) is threadedly connected to a threaded sleeve (208), the bottom of the threaded sleeve (208) is fixedly connected to fixing blocks (209) all around the bottom, and the bottom of the fixing block (209) is fixedly connected to a base (210).

3. A noise reduction mechanism for a fan according to claim 1, characterized in that: A temperature sensor (15) is fixedly connected to the front side of the outer wall of the fan (1), and a display screen (16) is fixedly connected to the front side of the outer wall of the temperature sensor (15).

4. A noise reduction mechanism for a fan according to claim 1, characterized in that: A sealing gasket (17) is provided on the left side of the outer wall of the air inlet pipe (3), and the sealing gasket (17) is threadedly connected to the air inlet pipe (3) via the second bolt (4).

5. A noise reduction mechanism for a fan according to claim 1, characterized in that: The front and rear sides of the outer walls of the air inlet pipe (3) and the air outlet pipe (7) are fixedly connected with a load-bearing block (18), and a reserved hole (19) is opened in the middle of the outer wall of the load-bearing block (18).

6. A noise reduction mechanism for a fan according to claim 2, characterized in that: The outer walls of the handle (207) and the threaded rod (206) are both provided with positioning holes (23), and the inner wall of the positioning hole (23) is slidably connected with a rotating rod (24).

7. A noise reduction mechanism for a fan according to claim 1, characterized in that: A hollow box (20) is fixedly connected to the front side of the outer wall of the support frame (13), and baffles (21) are fixedly connected to the left and right sides of the inner wall of the hollow box (20).

8. A noise reduction mechanism for a fan according to claim 1, characterized in that: The inner front and rear sides of the support frame (13) are fixedly connected with an inclined plate 1 (22), the outer wall of the inclined plate 1 (22) is fixedly connected with an inclined plate 2 (27), and the inclined plate 2 (27) is fixedly connected to the support frame (13).

Images