Waterproof noise reduction air inlet device

Abstract

The utility model discloses a waterproof noise reduction air inlet device which comprises a device body and a folded plate assembly, a containing cavity is formed in the device body, an air inlet is formed in the side wall of the device body in the containing cavity, an air outlet is formed in the top wall of the device body in the containing cavity, and the folded plate assembly is arranged in the containing cavity and divides the containing cavity into an air inlet cavity and an air outlet cavity. The air inlet cavity is communicated with the air inlet, the air exhaust cavity is communicated with the air exhaust, through the arrangement, the air inlet cavity and the air exhaust cavity can play a role in speed reduction on air, meanwhile, the folded plate assembly is matched, the waterproof purpose is achieved, further, the air inlet cavity and the air exhaust cavity have the noise reduction effect of a resistant silencer, medium-high frequency noise can be weakened, and the noise reduction effect is good. The folded plate assembly has the noise reduction effect of a resistive silencer so as to weaken low-frequency and medium-frequency noise, when the noise passes through the waterproof noise reduction air inlet device, the full-band noise can be weakened, and the noise reduction effect of the resistive composite silencer is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of unit box noise reduction devices, in particular to a waterproof noise reduction air intake device. Background Art

[0002] At present, the existing noise reduction air intake devices are generally of the wind bucket type. The wind bucket type noise reduction air intake device is to install a bucket structure behind the air inlet, which mainly plays a role in isolating the noise of the box from leaking directly from the air inlet, and plays a role in sound insulation. However, the bucket structure can only play a certain role in sound insulation, and the air duct is short, which cannot attenuate the leaked noise, so the noise reduction effect is limited. At the same time, the wind bucket introduces the cooling air entering the box into the upper part of the box, and discharges it to the outside of the box with the cooling fan, which cannot dissipate the heat of the equipment at the bottom of the box, thereby causing the temperature at the bottom of the box to be too high, affecting the normal use of the equipment. Furthermore, the existing noise reduction air intake device has no waterproof function, and rainwater or moisture in the air can easily enter the inside of the box from the noise reduction air intake device, thereby causing damage to the parts in the box. Summary of the invention

[0003] The purpose of the utility model is to address the technical problems existing in the background technology and to propose a waterproof noise reduction air inlet device, including a device body and a folding plate assembly. A accommodating chamber is arranged inside the device body, the accommodating chamber forms an air inlet on the side wall of the device body, and an air outlet is formed on the top wall of the device body. The folding plate assembly is arranged in the accommodating chamber and divides the accommodating chamber into an air inlet chamber and an air outlet chamber. The air inlet chamber is connected to the air inlet, and the air outlet is connected to the air outlet.

[0004] Furthermore, the folding plate assembly includes a plurality of folding plate units, which are arranged side by side and at intervals to form a noise reduction channel between two adjacent folding plate units, one end of the noise reduction channel is connected to the air inlet cavity, and the other end is connected to the air exhaust cavity.

[0005] Furthermore, the folding plate unit is provided with a first bending unit, one end of the first bending unit is connected to the top wall of the device body, and the other end extends inward to form a second bending unit, a third bending unit extends outward from the end of the second bending unit, a fourth bending unit extends inward from the end of the third bending unit, a fifth bending unit extends outward from the end of the fourth bending unit, and the end of the fifth bending unit is connected to the bottom wall of the device body.

[0006] Furthermore, the folding plate unit is provided with a first bent plate member and a second bent plate member on the left and right sides respectively, and sound absorbing material is filled between the first bent plate member and the second bent plate member.

[0007] Furthermore, a plurality of through holes are provided on the first bent plate member and / or the second bent plate member.

[0008] Furthermore, the sound-absorbing material is sound-absorbing cotton.

[0009] Compared with the prior art, the utility model has the following beneficial technical effects: because the utility model is provided with a accommodating chamber inside the device body, the accommodating chamber forms an air inlet on the side wall of the device body, and an air outlet is formed on the top wall of the device body, the folding plate assembly is arranged in the accommodating chamber, and the accommodating chamber is divided into an air inlet chamber and an air outlet chamber, the air inlet chamber is connected with the air inlet, and the air outlet is connected with the air outlet.

[0010] Through the above arrangement, when the air humidity is high or contains rainwater, after being decelerated twice by the air inlet chamber and the air exhaust chamber, the rainwater in the air will fall to the bottom plate of the device under the action of gravity. Furthermore, when the air passes through the folding plate assembly, the air contacts the folding plate assembly to form water droplets, which fall to the bottom plate of the device under the action of gravity. The rainwater on the bottom plate can be discharged from the waterproof noise reduction air inlet device through the air inlet 102 arranged at the bottom of the front end plate to achieve the purpose of waterproofing.

[0011] Furthermore, the air inlet chamber and exhaust chamber of the utility model have the noise reduction effect of a resistive silencer, which can weaken medium and high frequency noise. The folding plate assembly has the noise reduction effect of a resistive silencer, which can weaken low and medium frequency noise. When the noise passes through the waterproof noise reduction air inlet device, it can weaken the noise of the entire frequency band, thereby achieving the noise reduction effect of an impedance composite silencer. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural perspective view of the utility model;

[0013] Figure 2 It is a partition diagram of the utility model;

[0014] Figure 3 It is a wind direction schematic diagram of the utility model;

[0015] Figure 4 It is a schematic diagram of the folding plate unit structure of the utility model. DETAILED DESCRIPTION

[0016] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0017] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or a specific connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0019] The specific embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0020] like Figures 1 to 4 As shown, the utility model proposes a waterproof noise reduction air inlet device, including a device body 101, and the device body 101 is composed of a top plate 61, a front end plate 62, a right side plate 63, a bottom plate 64, a left side plate 65 and a rear end plate 66. Specifically, the device body 101 is formed by welding the top plate 61, the front end plate 62, the right side plate 63, the bottom plate 64, the left side plate 65 and the rear end plate 66 to form a fully enclosed box body, and the interior of the box body is hollow to form a accommodating chamber, and the accommodating chamber forms a long air inlet 102 on the side plate of the device body 101, and forms a long air outlet 103 on the top plate 61 of the device body 101, the air inlet 102 is connected to the outside, and the air outlet 103 is connected to the unit box body.

[0021] Furthermore, the utility model also includes a folding plate assembly 201, which is arranged in the accommodating chamber and divides the accommodating chamber into an air inlet chamber 104 and an air exhaust chamber 105. The air inlet chamber 104 is connected to the air inlet port 102, and the air exhaust chamber 105 is connected to the air exhaust port 103.

[0022] Through the above-mentioned arrangement, when the waterproof noise reduction air inlet device is working, the air can enter the air inlet chamber 104 through the air inlet 102 to attenuate the air speed. Further, the air entering the air inlet chamber 104 can enter the exhaust chamber 105 through the gap between the folding plate components 201. Due to the spatial advantage of the exhaust chamber 105, the air can be decelerated again and finally enter the interior of the unit box through the top exhaust port 103.

[0023] Based on the above principle, it is not difficult to understand that when the air humidity is high or contains rainwater, after being decelerated twice by the air inlet chamber 104 and the air exhaust chamber 105, the rainwater in the air will fall to the bottom plate of the device under the action of gravity. Furthermore, when the air passes through the folding plate assembly 201, the air contacts the folding plate assembly 201 to form water droplets, which fall to the bottom plate of the device under the action of gravity. The rainwater on the bottom plate can be discharged from the waterproof noise reduction air inlet device through the air inlet 102 located at the bottom of the front end plate to achieve the purpose of waterproofing.

[0024] Furthermore, in this embodiment, the bottom plate of the device body 101 is tilted so that the air inlet 102 is lower than the air outlet 103 , which facilitates the discharge of rainwater from the air inlet 102 .

[0025] Furthermore, in this embodiment, the folding plate assembly 201 includes a plurality of folding plate units 301, and the plurality of folding plate units 301 are arranged side by side and at intervals to form a noise reduction channel between two adjacent folding plate units 301, and one end of the noise reduction channel is connected to the air inlet cavity 104, and the other end is connected to the exhaust cavity 105.

[0026] Furthermore, the folding plate unit 301 is provided with a first bending unit 401, one end of the first bending unit 401 is connected to the top wall of the device body 101, and the other end extends inward to form a second bending unit 402, the end of the second bending unit 402 extends outward to form a third bending unit 403, the end of the third bending unit 403 extends inward to form a fourth bending unit 404, the end of the fourth bending unit 404 extends outward to form a fifth bending unit 405, and the end of the fifth bending unit 405 is connected to the bottom wall of the device body 101.

[0027] Furthermore, the folding plate unit 301 is respectively provided with a first bent plate 51 and a second bent plate 52 on the left and right sides, and the first bent plate 51 and the second bent plate 52 are filled with sound-absorbing material 53. Preferably, a plurality of through holes are opened on the first bent plate 51 and / or the second bent plate 52 to form a microporous plate, and the sound-absorbing material is sound-absorbing cotton.

[0028] Further, as a preference, the size of the air outlet of the utility model controls the outlet wind speed within the range of 5m / s according to the wind volume, and the size of the exhaust port 103 controls the outlet wind speed within the range of 5m / s according to the wind volume.

[0029] The length of the folding plate units 301 and the distance between them are determined by calculating the noise reduction amount according to the following formula.

[0030] △L=(α0)P / S*l

[0031] Where: ——is the sound absorption coefficient related to the material sound absorption coefficient α0;

[0032] α0——normal incidence sound absorption coefficient;

[0033] P——muffler channel cross-sectional circumference (m);

[0034] S——muffler channel cross-sectional area (m2);

[0035] l——Effective length of the muffler (m).

[0036] Through the above arrangement, when the noise in the unit box leaks out through the waterproof noise reduction air inlet device, the noise will enter the exhaust cavity 105 through the exhaust port 103 to form an anti-noise silencing structure, and reflect part of the sound waves back to the direction of the sound source through the sudden change of the acoustic characteristics to achieve the purpose of noise reduction. Furthermore, after the noise is silenced by the exhaust cavity 105, it passes through the folding plate component 201. The noise absorbs the sound energy in the noise reduction channel through porous sound-absorbing materials such as sound-absorbing cotton and microporous plates to reduce the noise. Finally, the noise enters the air inlet cavity 104 after being absorbed by the folding plate component 201 to form an anti-noise silencing structure, and leaks out to the outside of the box after being silenced.

[0037] Based on the above analysis, it can be understood that the air inlet chamber 104 and the exhaust chamber 105 of the utility model have the noise reduction effect of a reactive silencer, which can weaken the medium and high frequency noise, and the folding plate assembly has the noise reduction effect of a resistive silencer, which can weaken the low and medium frequency noise. When the noise passes through the waterproof noise reduction air inlet device, the noise of the entire frequency band can be weakened, thereby achieving the noise reduction effect of an impedance composite silencer.

[0038] The above are one or more implementation methods provided in combination with specific content, and it is not intended that the specific implementation of the utility model is limited to these descriptions. Any method, structure, etc. similar to or identical to the method, structure, etc. of the utility model, or any technical deduction or replacement based on the concept of the utility model, shall be deemed to be within the protection scope of the utility model.

Claims

1. A waterproof noise reduction air inlet device, characterized in that: The invention comprises a device body (101) and a folding plate assembly (201); a accommodating chamber is arranged inside the device body (101); an air inlet (102) is formed on the side wall of the device body (101) and an air outlet (103) is formed on the top wall of the device body (101); the folding plate assembly (201) is arranged in the accommodating chamber and divides the accommodating chamber into an air inlet chamber (104) and an air outlet chamber (105); the air inlet chamber (104) is connected to the air inlet (102), and the air outlet chamber (105) is connected to the air outlet (103).

2. A waterproof noise reduction air inlet device according to claim 1, characterized in that: The folding plate assembly (201) comprises a plurality of folding plate units (301), wherein the plurality of folding plate units (301) are arranged side by side and at intervals to form a noise reduction channel between two adjacent folding plate units (301), wherein one end of the noise reduction channel is connected to the air inlet cavity (104), and the other end is connected to the air outlet cavity (105).

3. A waterproof noise reduction air inlet device according to claim 2, characterized in that: The folding plate unit (301) is provided with a first bending unit (401), one end of the first bending unit (401) is connected to the top wall of the device body (101), and the other end extends inwardly to form a second bending unit (402), the end of the second bending unit (402) extends outwardly to form a third bending unit (403), the end of the third bending unit (403) extends inwardly to form a fourth bending unit (404), the end of the fourth bending unit (404) extends outwardly to form a fifth bending unit (405), and the end of the fifth bending unit (405) is connected to the bottom wall of the device body (101).

4. A waterproof noise reduction air inlet device according to claim 2, characterized in that: The folding plate unit (301) is provided with a first bent plate member (51) and a second bent plate member (52) on the left and right sides respectively, and a sound absorbing material (53) is filled between the first bent plate member (51) and the second bent plate member (52).

5. A waterproof noise reduction air inlet device according to claim 4, characterized in that: A plurality of through holes are provided on the first bent plate member (51) and / or the second bent plate member (52).

6. A waterproof noise reduction air inlet device according to claim 4, characterized in that: The sound absorbing material is sound absorbing cotton.

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