A curing barn fan noise reduction device

Abstract

The utility model belongs to drying equipment technical field, concretely relates to a kind of drying room fan noise reduction equipment, including fan main body and air outlet, air outlet is connected to the front side of fan main body, and the outer surface of air outlet is provided with noise reduction assembly;Noise reduction assembly includes protective housing, soundproof board, resonance cavity, sound absorption board, barrier, sound-absorbing sheet and sound guide board, protective housing is sleeved on the surface of air outlet, soundproof board is connected in the inside of protective housing, resonance cavity is connected in the inside of soundproof board, and sound absorption board is connected in the inside of resonance cavity.Barrier is connected in the inside of sound absorption board, sound-absorbing sheet is connected in the inside of barrier, sound guide board is connected in the inside of sound-absorbing sheet, and sound guide board is connected to the outer surface of air outlet.The utility model provides a kind of drying room fan noise reduction equipment, can reduce the sound propagation when airflow passes through air outlet, optimize the noise generated by fan main body, to improve working environment, reduce the discomfort due to noise generation.

Description

Technical Field

[0001] This utility model belongs to the field of drying equipment technology, specifically relating to a noise reduction device for drying oven fans. Background Technology

[0002] Drying oven fans are commonly used in industrial applications such as drying, ventilation, and air circulation, especially in food processing, wood drying, and chemical industries. Because these fans typically operate at high power, they can generate significant noise; therefore, noise reduction design is crucial for improving the working environment.

[0003] Although existing fan designs that optimize impeller and bearings can reduce noise, the airflow typically generates turbulence in the impeller and ductwork during operation, especially at the fan outlet. Even after passing through the impeller, the airflow still forms varying degrees of turbulence at the outlet, leading to high-frequency noise. This noise can become more pronounced, particularly at higher wind speeds. The noise generated by the fan during operation not only affects the working environment of employees but also poses a health hazard to employees with prolonged exposure to high noise levels. Utility Model Content

[0004] The purpose of this invention is to provide a noise reduction device for a drying oven fan, which can reduce the sound transmission when the airflow passes through the air outlet, optimize the noise generated by the fan body, improve the working environment, and reduce discomfort caused by noise.

[0005] The specific technical solution adopted by this utility model is as follows:

[0006] A noise reduction device for a drying oven fan includes a fan body and an air outlet. The air outlet is connected to the front side of the fan body, and a noise reduction component is provided on the outer surface of the air outlet. The noise reduction component includes a protective shell, a sound insulation board, a resonance cavity, a sound-absorbing board, a barrier board, a sound-absorbing sheet, and a sound guide plate. The protective shell is fitted onto the surface of the air outlet. The sound insulation board is connected to the interior of the protective shell. The resonance cavity is connected to the interior of the sound insulation board. The sound-absorbing board is connected to the interior of the resonance cavity. The barrier board is connected to the interior of the sound-absorbing board. The sound-absorbing sheet is connected to the interior of the barrier board. The sound guide plate is connected to the interior of the sound-absorbing sheet and is connected to the outer surface of the air outlet.

[0007] Preferably, a mounting bracket is fitted on the front side of the air outlet surface, and a barrier frame is fixedly connected to the top and bottom of the mounting bracket. A fastening screw is rotatably connected to the bottom of the inner wall of the barrier frame, and the top end of the fastening screw extends through to the top of the barrier frame. A fixing member is slidably connected to the inner wall of the barrier frame, and the fixing member is threadedly connected to the surface of the fastening screw. The fixing member is in close contact with the outer surface of the protective shell.

[0008] Preferably, the inner wall of the sound guide plate is provided with a sound guiding channel, the sound guiding channel is a tapered channel, and there are several sound guiding channels, which are evenly distributed on the inner wall of the sound guide plate.

[0009] Preferably, a sound-insulating pad is connected between the sound guide plate and the sound-absorbing sheet, and the sound-insulating pad is made of an elastic material.

[0010] Preferably, the surface of the sound-absorbing sheet is provided with sound-absorbing holes, and the number of sound-absorbing holes is several and they are evenly distributed on the surface of the sound-absorbing sheet.

[0011] Preferably, the resonating cavity is provided with sound-insulating cotton inside, and the sound-insulating cotton is in the shape of several strips and is distributed at equal intervals on the inner wall of the resonating cavity.

[0012] Preferably, the bottom of the fan body is connected to a shock-absorbing pad, which is made of five-centimeter-thick rubber.

[0013] The technical effects achieved by this utility model are as follows:

[0014] In this invention, when the fan body is working and blowing air, the sound guide plate can guide the sound waves to propagate along a specific path, making it easier for the sound waves to be absorbed and reduced by the sound-absorbing plate. The sound wave propagation is further reduced by the action of the barrier plate, especially between the resonant cavity and the sound-absorbing plate. The barrier plate separates different sound wave frequency bands to avoid mutual interference between noises of different frequencies. Finally, with the sound insulation plate isolating external and internal noise, it can effectively reduce the noise generated by the fan from being transmitted to the outside through the air outlet of the fan body and block the noise within a certain range, reducing noise leakage and ensuring the maximum noise reduction effect of the equipment. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a three-dimensional diagram showing the disassembled noise reduction component of this utility model;

[0017] Figure 3 This is a utility model Figure 2 Enlarged 3D schematic diagram at point A in the middle;

[0018] Figure 4 This is a three-dimensional schematic diagram of the mounting frame structure of this utility model;

[0019] Figure 5 This is a top-view cross-sectional three-dimensional schematic diagram of the resonant cavity of this utility model.

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1. Fan body; 101. Air outlet; 201. Protective shell; 202. Sound insulation board; 203. Resonance cavity; 204. Sound absorption board; 205. Barrier board; 206. Sound-absorbing sheet; 207. Sound guide plate; 301. Mounting bracket; 302. Barrier frame; 303. Fastening screw; 304. Fixing component; 4. Sound guide channel; 5. Sound insulation pad; 6. Sound-absorbing hole; 7. Sound insulation cotton; 8. Vibration damping pad. Detailed Implementation

[0022] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0023] like Figures 1-5As shown, a noise reduction device for a drying oven fan includes a fan body 1 and an air outlet 101. The air outlet 101 is connected to the front side of the fan body 1, and a noise reduction component is provided on the outer surface of the air outlet 101. The noise reduction component includes a protective shell 201, a sound insulation plate 202, a resonance cavity 203, a sound absorption plate 204, a barrier plate 205, a sound-absorbing sheet 206, and a sound guide plate 207. The protective shell 201 is fitted onto the surface of the air outlet 101, the sound insulation plate 202 is connected to the inside of the protective shell 201, the resonance cavity 203 is connected to the inside of the sound insulation plate 202, and the sound absorption plate 204 is connected to the inside of the resonance cavity 203. The baffle plate 205 is connected to the interior of the sound-absorbing plate 204, the sound-absorbing sheet 206 is connected to the interior of the baffle plate 205, and the sound guide plate 207 is connected to the interior of the sound-absorbing sheet 206 and to the outer surface of the air outlet 101. The function of the sound guide plate 207 is to guide the sound waves to propagate along a specific path. It optimizes the noise reduction effect and reduces noise leakage by controlling the direction of sound wave propagation. The sound-absorbing sheet 206 then precisely eliminates the sound waves generated during the operation of the fan body 1, thereby reducing the overall noise of the fan body 1. The baffle plate 205 can further reduce the propagation of sound waves, especially between the resonance cavity 203 and the sound-absorbing plate 204. The baffle plate 205 separates different sound wave frequency bands to avoid mutual interference between noises of different frequencies. Subsequently, the noise will be absorbed by the sound-absorbing plate 204. Sound waves propagating in the air are typically made of materials with good sound absorption properties, such as polyurethane foam or glass wool, which can effectively reduce high-frequency noise. The sound-absorbing panel 204 can convert sound waves into heat energy, reducing the energy of the sound waves and thus achieving a noise reduction effect. The resonance cavity 203 uses the principle of acoustic resonance to absorb noise of specific frequencies, which is an effective way to reduce low-frequency noise. Finally, the sound insulation panel 202 isolates external and internal noise. It can effectively reduce the noise generated at the air outlet 101 of the fan body 1 from being transmitted to the outside and block the noise within a certain range, reducing noise leakage and achieving an effective noise reduction effect. The protective shell 201 can not only protect against external physical damage, but also make the noise reduction components more durable and reduce the noise transmission of the noise reduction components exposed to the external environment.

[0024] like Figure 1 and Figure 4As shown, a mounting bracket 301 is fitted on the front side of the air outlet 101. A baffle frame 302 is fixedly connected to both the top and bottom of the mounting bracket 301. A fastening screw 303 is rotatably connected to the bottom of the inner wall of the baffle frame 302. The top of the fastening screw 303 extends through to the top of the baffle frame 302. A fixing member 304 is slidably connected to the inner wall of the baffle frame 302. The fixing member 304 is threaded onto the surface of the fastening screw 303. The fixing member 304 is in close contact with the outer surface of the protective housing 201. After the noise reduction component is installed on the air outlet 101... First, the noise reduction component can be blocked and limited by the barrier frame 302. Then, the fastening screw 303 can be rotated to make the fixing member 304 move downward inside the barrier frame 302. The downward movement of the fixing member 304 can squeeze the protective shell 201 and the internal components. Through the downward pressure of the fixing member 304 and the design of the barrier frame 302, the noise reduction component can be limited and installed. It can effectively limit the front position of the noise reduction component, prevent the noise reduction component from shifting or being damaged during installation, and ensure the stability and effectiveness of the noise reduction component.

[0025] like Figure 2 and Figure 3 As shown, the inner wall of the sound guide plate 207 is provided with a sound guide channel 4. The sound guide channel 4 is a tapered channel, and there are several sound guide channels 4, which are evenly distributed on the inner wall of the sound guide plate 207. Several evenly distributed sound guide channels 4 can effectively disperse sound waves of different frequencies, avoiding the concentration of noise of a single frequency in a certain area. Through this dispersion effect, the accumulation of noise can be reduced, thereby reducing interference with other noise reduction components and improving the noise reduction effect of the entire component. In addition, the tapered channel has a gradually narrowing structure, which causes the sound waves to be compressed to a certain extent when passing through the sound guide channel 4, thereby producing a certain reflection and refraction effect. This not only helps to reduce the propagation speed of noise, but also enhances the attenuation effect of sound waves.

[0026] like Figure 2 and Figure 3 As shown, a sound-insulating pad 5 is connected between the sound guide plate 207 and the sound-absorbing plate 206. The sound-insulating pad 5 is made of elastic material. As an intermediary layer, the sound-insulating pad 5 can effectively isolate the propagation of sound waves. The elastic material has a good ability to absorb and attenuate sound, and can form an effective sound barrier between the sound guide plate 207 and the sound-absorbing plate 206, reducing the possibility of sound waves being transmitted from the sound guide plate 207 to the sound-absorbing plate 206 or propagating in the opposite direction. The use of elastic material can effectively reduce the propagation of vibration. When the fan body 1 is running, the sound guide plate 207 and the sound-absorbing plate 206 will be affected by airflow and mechanical vibration. The elastic sound-insulating pad 5, through its flexible characteristics, can absorb these vibrations and slow down the transmission of vibration, thereby reducing the source of noise, reducing the resonance and excessive vibration of the equipment, and improving the overall stability of the fan body 1.

[0027] like Figure 2 and Figure 3 As shown, the surface of the sound-absorbing sheet 206 has several sound-absorbing holes 6, which are evenly distributed on the surface of the sound-absorbing sheet 206. The presence of the sound-absorbing holes 6 increases the surface area and provides more contact points, allowing sound waves to be reflected, refracted, or absorbed on the surface of the sound-absorbing sheet 206. The evenly distributed sound-absorbing holes 6 help to disperse sound waves evenly, so that sound waves can be absorbed more effectively when passing through the sound-absorbing sheet 206, reducing noise reflected back into the environment. The porous structure can increase airflow and vibration diffusion, thereby improving the attenuation effect of sound waves. Especially for high-frequency noise, the design of the sound-absorbing holes 6 can effectively absorb and weaken the propagation of sound noise.

[0028] like Figure 5 As shown, the resonant cavity 203 is equipped with sound-insulating cotton 7 inside. The sound-insulating cotton 7 is in the shape of several strips and is evenly distributed on the inner wall of the resonant cavity 203. The resonant cavity 203 is usually used to adjust and control the resonance of audio or airflow. However, if it is not controlled, the resonant cavity 203 may produce unnecessary resonance and echo. The sound-insulating cotton 7 can effectively absorb the sound waves in the resonant cavity 203 and reduce the echo effect caused by sound wave reflection. The elasticity and sound absorption properties of the sound-insulating cotton 7 help to reduce these vibrations, maintain the stability of the equipment, and avoid noise or equipment damage caused by excessive vibration.

[0029] like Figure 1 As shown, a shock-absorbing pad 8 is connected to the bottom of the fan body 1. The shock-absorbing pad 8 is made of five-centimeter-thick rubber. When the fan body 1 is running, especially at high speed, it will generate a large vibration. The function of the shock-absorbing pad 8 is to isolate the vibration generated by the fan body 1. Vibration is usually one of the main sources of noise, especially low-frequency noise. By absorbing the vibration at the bottom of the fan body 1, the shock-absorbing pad 8 can effectively reduce the noise caused by vibration.

[0030] The working principle of this utility model is as follows: When the fan body 1 is working and blowing air, the sound guide plate 207 can guide the sound waves to propagate along a specific path, making it easier for the sound waves to be absorbed and reduced by the sound-absorbing plate 206. Under the action of the barrier plate 205, the propagation of the sound waves is further reduced, especially between the resonance cavity 203 and the sound-absorbing plate 204. The barrier plate 205 separates different sound wave frequency bands to avoid mutual interference between noises of different frequencies. Finally, under the effect of the sound insulation plate 202 isolating external and internal noise, it can effectively reduce the noise generated by the fan from being transmitted to the outside through the air outlet 101 of the fan body 1, and block the noise within a certain range, reduce noise leakage, and ensure the maximum noise reduction effect of the equipment.

[0031] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A noise reduction device for a drying oven fan, characterized in that: It includes a fan body (1) and an air outlet (101), the air outlet (101) is connected to the front side of the fan body (1), and a noise reduction component is provided on the outer surface of the air outlet (101); The noise reduction assembly includes a protective shell (201), a sound insulation plate (202), a resonance cavity (203), a sound absorption plate (204), a barrier plate (205), a sound-absorbing sheet (206), and a sound guide plate (207). The protective shell (201) is fitted onto the surface of the air outlet (101). The sound insulation plate (202) is connected to the inside of the protective shell (201). The resonance cavity (203) is connected to the inside of the sound insulation plate (202). The sound absorption plate (204) is connected to the inside of the resonance cavity (203). The barrier plate (205) is connected to the inside of the sound absorption plate (204). The sound-absorbing sheet (206) is connected to the inside of the barrier plate (205). The sound guide plate (207) is connected to the inside of the sound-absorbing sheet (206) and is connected to the outer surface of the air outlet (101).

2. The noise reduction device for a drying oven fan according to claim 1, characterized in that: A mounting bracket (301) is fitted on the front side of the surface of the air outlet (101). A barrier frame (302) is fixedly connected to the top and bottom of the mounting bracket (301). A fastening screw (303) is rotatably connected to the bottom of the inner wall of the barrier frame (302). The top end of the fastening screw (303) extends through to the top of the barrier frame (302). A fixing member (304) is slidably connected to the inner wall of the barrier frame (302). The fixing member (304) is threaded to the surface of the fastening screw (303). The fixing member (304) is in close contact with the outer surface of the protective shell (201).

3. The noise reduction device for a drying oven fan according to claim 1, characterized in that: The inner wall of the sound guide plate (207) is provided with a sound guide channel (4). The sound guide channel (4) is a tapered channel, and there are several sound guide channels (4) that are evenly distributed on the inner wall of the sound guide plate (207).

4. The noise reduction device for a drying oven fan according to claim 1, characterized in that: A sound-insulating pad (5) is connected between the sound guide plate (207) and the sound-absorbing plate (206), and the sound-insulating pad (5) is made of elastic material.

5. The noise reduction device for a drying oven fan according to claim 1, characterized in that: The surface of the sound-absorbing plate (206) is provided with sound-absorbing holes (6), and there are several sound-absorbing holes (6) that are evenly distributed on the surface of the sound-absorbing plate (206).

6. The noise reduction device for a drying oven fan according to claim 1, characterized in that: The resonant cavity (203) is provided with sound insulation cotton (7), which is in the shape of several strips and is distributed at equal intervals on the inner wall of the resonant cavity (203).

7. The noise reduction device for a drying oven fan according to claim 1, characterized in that: The bottom of the fan body (1) is connected to a shock-absorbing pad (8), which is made of five-centimeter-thick rubber.

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