CN219432138U

CN219432138U - Fan box with noise elimination function

Info

Publication number: CN219432138U
Application number: CN202320528647.6U
Authority: CN
Inventors: 王圣洁; 甘延婷; 黄友力; 周正; 张楠
Original assignee: Shandong Boke Construction Engineering Co ltd
Current assignee: Shandong Boke Construction Engineering Co ltd
Priority date: 2023-03-17
Filing date: 2023-03-17
Publication date: 2023-07-28
Anticipated expiration: 2033-03-17

Abstract

The utility model relates to a fan box with a noise elimination function, which comprises an outer wall plate, wherein a fan section, a micropore cavity flow equalization section and a noise elimination section are sequentially arranged in the outer wall plate along the airflow direction, a tubular inner wall plate is arranged in the micropore cavity flow equalization section and the noise elimination section, a plurality of cavity wall plates are connected between the inner wall plate and the outer wall plate, a wall plate cavity is formed between the adjacent cavity wall plates, an inner partition plate assembly is arranged in the inner wall plate of the noise elimination section, the inner partition plate assembly comprises a first partition plate and a second partition plate which are arranged in parallel, a plurality of cavity partition plates are connected between the first partition plate and the second partition plate, a partition plate cavity is formed between the adjacent cavity partition plates, and the inner wall plate, the cavity wall plate, the first partition plate, the second partition plate and the cavity partition plates are all micropore plates; the heat dissipation performance is good, and the safety performance of the fan case is improved; the air flow is smooth, and the resistance is small; simple structure, reasonable in design, installation transportation is convenient, and economic nature is strong.

Description

Fan box with noise elimination function

Technical Field

The utility model relates to the field of fan boxes, in particular to a fan box with a noise elimination function.

Background

At present, the fan case is widely applied to ventilation systems because of the advantages of simple manufacture and installation, economy and reasonable, obvious air supply and exhaust effect and the like. However, during the operation of the fan case, the motor vibration, the impeller rotation, the airflow and the case resonance all generate great noise. The noise that keeps sending influences on the one hand and works life emotion, disturbs people's rest environment, and on the other hand harm people's physical and mental health. Based on such a current situation, there is a need for a fan box with a muffler device in a ventilation system, which solves the existing noise problem.

The main noise elimination measure of the existing fan case is to adhere a layer of filler such as noise elimination cotton to the inner wall of the case body, so that the noise elimination purpose of the fan case is achieved. However, as the material performance of the soundproof cotton is reduced along with the longer service time, the soundproof cotton stuck on the inner wall surface of the fan box can cause particles to be mixed into the air, and secondary pollution is caused to the indoor environment. And moreover, the noise elimination cotton has poor heat conductivity, and a fan motor arranged in the fan box continuously runs to generate a large amount of heat which cannot be dissipated, so that mechanical faults and even explosion are easily caused, and the safety performance is reduced.

Another noise elimination measure of the existing fan case is to arrange a wind pipe type muffler at the air outlet to achieve the purpose of noise elimination and noise reduction, but the noise elimination method can increase the pressure loss of a ventilation system, increase the system resistance and has higher off-board residual pressure requirement on the fan case. And the air pipe type muffler needs to be lifted and fixed, so that the complexity of system installation is increased. The silencing material in the air pipe type silencer may cause secondary pollution to the air environment in the air pipe.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the fan box with the silencing function, which has the advantages of high safety, small system resistance, convenient installation and high-quality silencing material.

The utility model provides a fan box with a silencing function, which comprises a tubular outer wall plate, wherein a fan section, a micropore cavity flow equalizing section and a silencing section are sequentially arranged in the outer wall plate along the air flow direction, tubular inner wall plates are arranged in the micropore cavity flow equalizing section and the silencing section, a plurality of cavity wall plates extending along the air flow direction are connected between the inner wall plates and the outer wall plate, a wall plate cavity penetrating along the air flow direction is formed between the adjacent cavity wall plates, an inner partition plate assembly is arranged in the inner wall plate of the silencing section, the inner partition plate assembly comprises a first partition plate and a second partition plate which are arranged in parallel, a plurality of cavity partition plates extending along the air flow direction are connected between the first partition plate and the second partition plate, a partition plate cavity penetrating along the air flow direction is formed between the adjacent cavity partition plates, and the inner wall plates, the cavity wall plates, the first partition plates, the second partition plates and the cavity partition plates are all micropore plates.

When the airflow passes through the micro-hole cavity flow equalizing section and the silencing section, sound waves contact the inner wall plate of the fan case, enter the wall plate cavity from the micro-holes on the inner wall plate, enter the partition wall plate cavity through the cavity wall plate beside the wall plate cavity, are reflected back and forth in the wall plate cavity, repeatedly shuttle in the micro-holes with smaller size, and gradually reduce the sound amplitude, so that a large amount of high-amplitude sound waves are absorbed by the micro holes on the inner wall when passing through the micro-hole cavity flow equalizing section, and play a role in silencing.

When the initially muffled air flow continuously flows through the muffling section, sound waves pass through the inner partition plate assemblies densely arranged in an array form, contact the first partition plate and the second partition plate, and a part of high-amplitude sound waves are repeatedly reflected between the adjacent inner partition plate assemblies until the sound waves disappear. The other part of low-amplitude sound waves are absorbed into the cavity of the partition plate through the micropores on the first partition plate and the second partition plate, enter the cavity of the partition plate through the cavity partition plate beside the cavity of the partition plate, repeatedly pass through the micropore plate with smaller size in this way, and continuously reduce the sound amplitude until the sound amplitude disappears. On the other hand, when a large amount of airflow sound waves in the fan case flow in multiple directions, the first partition plates and the second partition plates which are densely arranged on the section generate resonance, the sound energy of the sound waves is continuously converted into the mechanical energy of the inner cavity partition plates and is absorbed by the microperforations, and therefore the silencing effect is achieved.

Preferably, the cavity wall panels are perpendicular to the joined inner and outer wall panels. In the scheme, the cavity wall plates are perpendicular to the connected inner wall plates and outer wall plates, so that the cavities of the wall plates are identical in size and are uniformly arranged.

Preferably, the inner partition plate assemblies are respectively provided with two groups in the transverse direction and the longitudinal direction. In this scheme, the inner baffle subassembly transversely and vertically respectively are equipped with two sets of to constitute rectangular cavity structure between a plurality of inner baffle subassemblies, can play fine noise elimination effect.

Preferably, the cavity partition is perpendicular to the first partition and the second partition. In the scheme, the cavity partition plates are perpendicular to the first partition plates and the second partition plates, so that the cavities of the partition plates are identical in size and are uniformly arranged.

As optimization, the pore diameter of the micropores on the inner wall plate, the cavity wall plate, the first partition plate, the second partition plate and the cavity partition plate is 1mm, and the pore spacing is 10mm. In the scheme, the aperture of the micropore is 1mm, the aperture distance is 10mm, and therefore a good silencing effect is achieved.

As optimization, the inner wall plate, the cavity wall plate, the first partition plate, the second partition plate and the cavity partition plate are galvanized steel plates and have the thickness of 1-3mm. In this scheme interior wallboard, cavity wallboard, first baffle, second baffle and cavity baffle are galvanized steel sheet, and antirust effect is good, and is with low costs, and thickness is 1-3mm, can effective noise reduction, is convenient for convert sound wave into mechanical energy.

As optimization, the cross sections of the partition plate cavity and the wallboard cavity are square. In the scheme, the cross sections of the partition plate cavity and the wallboard cavity are square, so that sound waves can be reflected inside to be muffled.

The beneficial effects of the utility model are as follows:

the utility model is provided with three functional sections of the fan section, the micropore cavity flow equalizing section and the silencing section, after the airflow absorbs power through the fan section, the airflow is subjected to preliminary silencing through the micropore cavity flow equalizing section and then subjected to further silencing through the silencing section, so that the fan box has good silencing effect.

The inner wall plate and the cavity wall plate arranged in the micro-pore cavity flow equalizing section are micro-pore plates, and have good silencing effect on sinusoidal sound waves.

The silencing section is provided with an inner wall plate, a cavity wall plate, a first baffle, a second baffle and a cavity baffle, so that a novel silencing structure is formed, a plurality of silencing cavities are formed effectively, the baffle is driven to resonate, sound wave energy is converted into mechanical energy, and a good silencing effect is achieved on sound waves.

The fan box with the silencing function has the advantages that silencing materials are sanitary, and secondary pollution to air is avoided; the heat dissipation performance is good, and the safety performance of the fan case is improved; the air flow is smooth, and the resistance is small; the muffler device is arranged in the fan case, and has the advantages of simple structure, reasonable design, convenient installation and transportation and strong economy.

Drawings

FIG. 1 is a schematic diagram of a fan case according to the present utility model;

FIG. 2 is a cross-sectional view of the A-A plane of the fan case of FIG. 1 in accordance with the present utility model;

FIG. 3 is a cross-sectional view of the B-B side of the enclosure of FIG. 1 in accordance with the present utility model;

the figure shows:

1. outer wallboard, 2, inner wallboard, 3, cavity wallboard, 4, wallboard cavity, 5, first baffle, 6, second baffle, 7, cavity baffle, 8, baffle cavity.

Detailed Description

In order to clearly illustrate the technical characteristics of the scheme, the scheme is explained below through a specific embodiment.

As shown in figures 1-3, the fan box with the noise elimination function comprises a tubular outer wall plate 1, wherein the outer wall plate 1 is square, the outer wall plate is made of galvanized steel plates, the plate thickness is 2mm, one end of the outer wall plate is provided with an air flow inlet, and the other end of the outer wall plate is provided with an air flow outlet, so that air flow flows in the fan box. The inside of the outer wall plate 1 is sequentially provided with a fan section, a micropore cavity flow equalizing section and a silencing section along the airflow direction.

The microporous cavity flow equalizing section and the silencing section are internally provided with tubular inner wall plates 2, the inner wall plates 2 are square pipes parallel to the outer wall plates 1, and the pipe spacing between the inner wall plates 2 and the outer wall plates 1 is 50mm.

A plurality of cavity wall plates 3 extending along the air flow direction are connected between the inner wall plate 2 and the outer wall plate 1, the cavity wall plates 3 are perpendicular to the connected inner wall plate 2 and outer wall plate 1, wall plate cavities 4 penetrating along the air flow direction are formed between the adjacent cavity wall plates 3, and the cross section of the wall plate cavities 4 is square.

The inner wall plate 2 of the sound elimination section is internally provided with an inner partition plate assembly, the inner partition plate assembly comprises a first partition plate 5 and a second partition plate 6 which are arranged in parallel, the end parts of the first partition plate 5 and the second partition plate 6 are connected with the inner side of the inner wall plate 2, and the distance between the first partition plate 5 and the second partition plate 6 is 50mm.

A plurality of cavity clapboards 7 extending along the air flow direction are connected between the first clapboards 5 and the second clapboards 6, and the cavity clapboards 7 are perpendicular to the first clapboards 5 and the second clapboards 6. A partition plate cavity 8 penetrating along the air flow direction is formed between the adjacent cavity partition plates 7, and the cross section of the partition plate cavity 8 is square.

As shown in fig. 3, the inner separator plate assembly is provided with two groups each in the transverse and longitudinal directions. The transverse inner baffle plate assembly and the longitudinal inner baffle plate assembly are arranged in a crossing way.

The inner wall plate 2, the cavity wall plate 3, the first partition plate 5, the second partition plate 6 and the cavity partition plate 7 are all micro-porous plates. The micropore plate refers to a plate on which densely distributed round holes are formed, and the micropore apertures of the inner wall plate 2, the cavity wall plate 3, the first baffle 5, the second baffle 6 and the cavity baffle 7 are 1mm, and the hole spacing is 10mm.

The inner wall plate 2, the cavity wall plate 3, the first partition plate 5, the second partition plate 6 and the cavity partition plate 7 are galvanized steel plates with the thickness of 1-3mm, and the galvanized steel plates adopted in the embodiment have the thickness of 2mm.

The application method of the utility model comprises the following steps:

when the ventilation system is distributed in a complex way, the pipeline has larger pressure loss, and the fan with high rotating speed and high pressure head is required to improve the airflow power, so that larger system noise can be generated. The air flow flows through the fan case, and the motor vibrates at the fan section to drive the impeller to rotate, so that the air flow is driven to flow, noise is generated around the fan, and the noise propagates along the air flow direction.

The sound wave is propagated in a plurality of directions by a sine wave curve, when the sound wave flows through the microperforations with smaller apertures, the section of the propagation route is limited, the wave crest of the sound wave frequently hits the wall, and the sound amplitude can be greatly reduced. In the fan case, when the airflow flows through the micro-hole cavity flow equalizing section, the sound waves contact the inner wall plate 2 of the fan case, enter the wall plate cavity 4 from the micro-holes on the inner wall plate 2, enter the partition wall plate cavity through the cavity wall 3 beside the wall plate cavity 4, are reflected back and forth in the wall plate cavity, repeatedly shuttle in the micro-holes with smaller size, and gradually reduce the sound amplitude. Therefore, a large amount of high-amplitude sound waves are absorbed by the micropores of the inner wall when passing through the flow equalizing section of the micropore cavity, and the silencing effect is achieved.

As the initially muffled air flow continues through the muffling segment, the sound waves pass through the inner baffle assemblies densely arranged in an array, contacting the first baffle 5 and the second baffle 6. A portion of the high amplitude sound waves are repeatedly reflected between adjacent inner baffle assemblies until vanishing. The other part of the low-amplitude sound wave is absorbed into the baffle cavity 8 through the micro-perforations on the first baffle 5 and the second baffle 6, and enters the baffle cavity of the baffle wall through the cavity baffle 7 beside the baffle cavity 8, so that the sound amplitude is continuously reduced until the sound disappears through the micro-perforated plates with smaller sizes repeatedly. On the other hand, when a large amount of airflow sound waves in the fan case flow in multiple directions, a plurality of vertical partition plates are arranged densely on the section to generate resonance, and sound energy of the sound waves is continuously converted into mechanical energy of the inner cavity partition plates and absorbed by micro-perforations on the partition plates, so that a silencing effect is achieved.

Of course, the above description is not limited to the above examples, and the technical features of the present utility model that are not described may be implemented by or by using the prior art, which is not described herein again; the above examples and drawings are only for illustrating the technical scheme of the present utility model and not for limiting the same, and the present utility model has been described in detail with reference to the preferred embodiments, and it should be understood by those skilled in the art that changes, modifications, additions or substitutions made by those skilled in the art without departing from the spirit of the present utility model and the scope of the appended claims.

Claims

1. The utility model provides a fan case from taking noise elimination function, includes tubular outer wall board (1), its characterized in that: the novel air conditioner comprises an outer wall plate (1), wherein a fan section, a micropore cavity flow equalizing section and a silencing section are sequentially arranged in the outer wall plate (1) along the air flow direction, tubular inner wall plates (2) are arranged in the micropore cavity flow equalizing section and the silencing section, a plurality of cavity wall plates (3) extending along the air flow direction are connected between the inner wall plates (2) and the outer wall plate (1), wall plate cavities (4) penetrating along the air flow direction are formed between adjacent cavity wall plates (3), an inner partition plate assembly is arranged in the inner wall plates (2) of the silencing section, the inner partition plate assembly comprises a first partition plate (5) and a second partition plate (6) which are arranged in parallel, a plurality of cavity partition plates (7) extending along the air flow direction are connected between the first partition plate (5) and the second partition plate (6), partition plate cavities (8) penetrating along the air flow direction are formed between the adjacent cavity partition plates (7), and the inner wall plates (2), the cavity wall plates (3), the first partition plates (5), and the second partition plates (6) and the cavity partition plates (7) are micropore plates.

2. The fan box with a silencing function according to claim 1, wherein: the cavity wall plate (3) is perpendicular to the connected inner wall plate (2) and outer wall plate (1).

3. The fan box with a silencing function according to claim 1, wherein: the inner baffle plate component is provided with two groups in the transverse direction and the longitudinal direction respectively.

4. The fan box with a silencing function according to claim 1, wherein: the cavity partition (7) is perpendicular to the first partition (5) and the second partition (6).

5. The fan box with a silencing function according to claim 1, wherein: the pore diameter of the micropores on the inner wall plate (2), the cavity wall plate (3), the first partition plate (5), the second partition plate (6) and the cavity partition plate (7) is 1mm, and the pore spacing is 10mm.

6. The fan box with a silencing function according to claim 1, wherein: the inner wall plate (2), the cavity wall plate (3), the first partition plate (5), the second partition plate (6) and the cavity partition plate (7) are galvanized steel plates, and the thickness is 1-3mm.

7. The fan box with a silencing function according to claim 1, wherein: the cross sections of the partition plate cavity (8) and the wallboard cavity (4) are square.