Fan soundproofing box

Abstract

The utility model relates to the field of sound insulation box, concretely is fan sound insulation box, including sound insulation box frame, the one side fixed connection of sound insulation box frame has the closing plate, the one side fixed communication of sound insulation box frame has the air inlet, the top plate fixed communication of sound insulation box frame has the air outlet, the inner chamber fixed connection of sound insulation box frame has the multi -hole plate, the one side fixed connection of multi -hole plate has microperforated flared plate, the surface of microperforated flared plate is equipped with the conical flared mouth, the inner chamber fixed connection of sound insulation box frame has microperforated flat hole plate, the utility model discloses the combination between conical flared mouth, microperforated flared plate, microperforated flat hole plate, non - woven fabric and sound - absorbing cotton reaches the effect that forms the gradually changing sound impedance, reduces the sound wave reflection, improves the sound energy dissipation, solves the sound absorption frequency band of sound insulation box its inside perforated plate is narrow, and the middle high frequency sound absorption efficiency is low, and the problem that the protection function is single is easily led to the noise rebounding and leaking outside on the surface of box body, and the perforated plate itself is easy to produce the board piece resonance.

Description

Technical Field

[0001] This utility model relates to the field of soundproof boxes, specifically a fan soundproof box. Background Technology

[0002] With economic development and social progress, the environmental protection industry is an important material foundation and technological guarantee for environmental protection, and one of the new economic growth points of the national economy. Vigorously developing the environmental protection industry is an important measure to implement the sustainable development strategy. Fan noise insulation boxes are used for noise control in industries such as electronics, automobiles, steel, chemicals, light industry and pharmaceuticals.

[0003] Traditional soundproof enclosures have narrow sound absorption bandwidth and low mid-to-high frequency sound absorption efficiency due to the perforated panels inside. This makes it easy for noise to bounce off the enclosure surface and leak out. In addition, the perforated panels themselves are prone to resonance, resulting in limited protective functions. Utility Model Content

[0004] To address the shortcomings of existing technologies, soundproof boxes have narrow sound absorption bandwidth and low mid-to-high frequency sound absorption efficiency due to the perforated plates inside, which easily leads to noise rebounding and leakage on the box surface. Furthermore, the perforated plates themselves are prone to plate resonance, resulting in limited protective functions. Therefore, this utility model proposes a fan soundproof box.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a fan soundproof box, including a soundproof box frame, a sealing plate fixedly connected to one side of the soundproof box frame, an air inlet fixedly connected to one side of the soundproof box frame, and an air outlet fixedly connected to the top plate of the soundproof box frame.

[0006] The inner cavity of the soundproof box frame is fixedly connected to a perforated plate, and a micro-perforated flared plate is fixedly connected to one side of the perforated plate. The surface of the micro-perforated flared plate has a tapered flare. The inner cavity of the soundproof box frame is fixedly connected to a micro-perforated flat plate. There is a gap between the micro-perforated flared plate and the micro-perforated flat plate. The inner cavity of the soundproof box frame is fixedly connected to sound-absorbing cotton, which consists of a wavy layer and a flat plate.

[0007] Preferably, a connecting rod is fixedly connected between the micro-perforated flat plate and the micro-perforated flared plate.

[0008] Preferably, a cooling fan is fixedly connected to the inner cavity of the circular hole of the soundproof box frame, and a door lock is provided inside the door of the soundproof box frame.

[0009] Preferably, a non-woven fabric is fixedly connected to the outer surface of the micro-perforated flat plate, and one side of the non-woven fabric is tightly attached to one side of the sound-absorbing cotton.

[0010] Preferably, the inner cavity of the door of the soundproof box frame is fixedly connected to a louver, with the louver structure facing downwards.

[0011] Preferably, the outer surfaces of the air outlet and air inlet are provided with a heat-resistant rubber layer.

[0012] The advantages of this utility model are:

[0013] This invention achieves the effect of forming a gradual acoustic impedance, reducing sound wave reflection, and improving sound energy dissipation through the combination of a conical flare, a micro-perforated flare plate, a micro-perforated flat hole plate, non-woven fabric, and sound-absorbing cotton. It solves the problems of narrow sound absorption frequency band, low mid-to-high frequency sound absorption efficiency, easy noise rebound and leakage on the surface of the box, easy plate resonance of the perforated plate itself, and single protective function of the soundproof box. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a first-view structural diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the second-view structure of the present invention;

[0018] Figure 4 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 5 This utility model Figure 4 Schematic diagram of the structure at point A;

[0020] Figure 6 This is a cross-sectional structural diagram of the micro-perforated flared plate and the micro-perforated flat hole plate in this utility model;

[0021] Figure 7 This utility model Figure 6 Schematic diagram of the structure at point A;

[0022] Figure 8 This is a schematic diagram of the sound-absorbing cotton structure in this utility model;

[0023] Figure 9 This is a cross-sectional structural diagram of the sound-absorbing cotton in this utility model.

[0024] In the diagram: 1. Soundproof box frame; 2. Sealing plate; 3. Air outlet; 4. Cooling fan; 5. Air inlet; 6. Louver; 7. Door lock; 8. Sound-absorbing cotton; 9. Perforated plate; 10. Micro-perforated flared plate; 11. Connecting rod; 12. Micro-perforated flat hole plate; 13. Non-woven fabric; 14. Conical flare. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0026] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0027] This application discloses a soundproof enclosure for a wind turbine. (Refer to...) Figure 1 and Figure 8 A soundproof enclosure for a fan includes a soundproof enclosure frame 1. A sealing plate 2 is fixedly connected to one side of the soundproof enclosure frame 1, and an air inlet 5 is fixedly connected to one side of the soundproof enclosure frame 1. An air outlet 3 is fixedly connected to the top plate of the soundproof enclosure frame 1. A perforated plate 9 is fixedly connected to the inner cavity of the soundproof enclosure frame 1. A micro-perforated flared plate 10 is fixedly connected to one side of the perforated plate 9. The surface of the micro-perforated flared plate 10 has a tapered flare 14. A micro-perforated flat perforated plate 12 is fixedly connected to the inner cavity of the soundproof enclosure frame 1. There is a gap between the micro-perforated flared plate 10 and the micro-perforated flat perforated plate 12. Sound-absorbing cotton 8 is fixedly connected to the inner cavity of the soundproof enclosure frame 1. The sound-absorbing cotton 8 consists of a layer of corrugated material. Composed of a flat plate shape, the air inlet 5 and air outlet 3 are connected to the inlet and outlet of the centrifugal fan through flexible connections, which can prevent the centrifugal fan from resonating with the box. When the centrifugal fan is running, the motor and wind noise will consume some of the sound energy through the perforated plate 9, and then through the conical flare 14, the micro-perforated flat plate 12, the non-woven fabric 13 and the sound-absorbing cotton 8 in sequence to consume some of the sound energy. The sealing plate 2 can isolate the sound energy inside the equipment, thereby reducing the direct transmission of noise. The sound-absorbing cotton 8 is composed of a wavy shape and a flat shape of sound-absorbing cotton. By changing the propagation path and reflection mode of noise, it can better reduce the direct transmission of noise.

[0028] Reference Figure 5 A connecting rod 11 is fixedly connected between the micro-perforated flat plate 12 and the micro-perforated flared plate 10, which can enhance the structural rigidity, suppress plate vibration, reduce secondary noise, prevent thermal deformation, and improve long-term operational reliability.

[0029] Reference Figure 2 and Figure 3A cooling fan 4 is fixedly connected to the inner cavity of the round hole of the soundproof box frame 1. A door lock 7 is installed inside the door of the soundproof box frame 1. The centrifugal fan will generate heat when it runs, so the cooling fan 4 is installed in the box to ventilate and reduce the internal temperature of the fan soundproof box.

[0030] Reference Figure 5 The outer surface of the micro-perforated flat plate 12 is fixedly connected with a non-woven fabric 13. One side of the non-woven fabric 13 is tightly attached to one side of the sound-absorbing cotton 8, which can prevent dust from depositing on the surface of the cotton and clogging the pores, and prevent the structure of the sound-absorbing cotton 8 from falling off.

[0031] Reference Figure 3 The inner cavity of the door of the soundproof box frame 1 is fixedly connected with a louver 6. The louver 6 has a downward-facing window structure, which can assist the cooling fan 4 in ventilating the inside of the soundproof box frame 1 and reducing the temperature inside the soundproof box frame 1.

[0032] Reference Figure 2 The outer surfaces of the air outlet 3 and the air inlet 5 are provided with heat-resistant rubber layers. When the soundproof box frame 1 is flexibly connected to the air outlet 3 and the air inlet 5 on the centrifugal fan, resonance between the centrifugal fan and the box can be avoided.

[0033] Working principle: First, the air outlet 3 and air inlet 5 are connected to the centrifugal fan via flexible connection to avoid resonance between the centrifugal fan and the casing. When the centrifugal fan is running, the motor and wind noise will first dissipate some of the sound energy through the perforated plate 9. After the sound waves enter the horn-shaped hole structure inside the conical flare 14 of the micro-perforated flare plate 10, they will diffuse. Subsequently, the gap between the micro-perforated flare plate 10 and the micro-perforated flat hole plate 12 can attenuate the noise. The noise continues to propagate to the micro-perforated flat hole plate 12 for further dissipation. At the same time, the fan sound insulation box sealing plate 2 isolates the sound energy inside the equipment, thereby reducing the direct transmission of noise. The sound-absorbing cotton 8 consists of a layer of Composed of a wave-shaped layer and a flat layer of sound-absorbing cotton, it better reduces the direct transmission of noise by changing the propagation path and reflection method. The centrifugal fan generates heat when running. Since the centrifugal fan is sealed in the soundproof box frame 1, a cooling fan 4 and louvers 6 are installed in the box for ventilation, so that the temperature inside the soundproof box frame 1 will not be too high. Due to the existence of the sound insulation structure, the noise of the fan is eliminated or controlled within a certain range, reducing the impact on the surrounding environment and human health. The flexible connection can be connected by heat-resistant rubber flexible joints to avoid resonance between the centrifugal fan and the soundproof box frame 1.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A fan soundproof enclosure, comprising a soundproof enclosure frame (1), characterized in that: A sealing plate (2) is fixedly connected to one side of the soundproof box frame (1), an air inlet (5) is fixedly connected to one side of the soundproof box frame (1), and an air outlet (3) is fixedly connected to the top plate of the soundproof box frame (1). The inner cavity of the soundproof box frame (1) is fixedly connected to a perforated plate (9), and a micro-perforated flared plate (10) is fixedly connected to one side of the perforated plate (9). A tapered flared opening (14) is opened on the surface of the micro-perforated flared plate (10). A micro-perforated flat hole plate (12) is fixedly connected to the inner cavity of the soundproof box frame (1). There is a gap between the micro-perforated flared plate (10) and the micro-perforated flat hole plate (12). A sound-absorbing cotton (8) is fixedly connected to the inner cavity of the soundproof box frame (1). The sound-absorbing cotton (8) is composed of a wave-shaped layer and a flat plate-shaped layer.

2. The fan soundproof box according to claim 1, characterized in that: A connecting rod (11) is fixedly connected between the micro-perforated flat plate (12) and the micro-perforated flared plate (10).

3. The fan soundproof box according to claim 1, characterized in that: A cooling fan (4) is fixedly connected to the inner cavity of the circular hole of the soundproof box frame (1), and a door lock (7) is provided inside the door of the soundproof box frame (1).

4. The fan soundproof box according to claim 1, characterized in that: The outer surface of the micro-perforated flat plate (12) is fixedly connected with a non-woven fabric (13), and one side of the non-woven fabric (13) is tightly attached to one side of the sound-absorbing cotton (8).

5. The fan soundproof box according to claim 1, characterized in that: The inner cavity of the door of the soundproof box frame (1) is fixedly connected to a louver (6), and the window structure of the louver (6) faces downward.

6. The fan soundproof box according to claim 1, characterized in that: The outer surfaces of the air outlet (3) and the air inlet (5) are provided with heat-resistant rubber layers.

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