KR101901174B1 - Sound attenuator for duct of air conditioning system - Google Patents

Abstract

The present invention relates to a silencer installed in an air conditioning system and easily replaced based on a frequency of sound energy for maintenance or sound absorption. More specifically, the silencer includes: a body member; a plurality of first sound absorption members inserted into the body member and detachably coupled to the body member to absorb sound introduced into the body member to realize a sound-proof function; and a withdrawn bar inserted into the first sound absorption members while passing through the first sound absorption members such that the first sound absorption member is introduced into or withdrawn out of the body member. The first sound absorption member includes: a housing having openings formed in top, bottom, left, and right surfaces, an air flow guide plate formed on the front surface of the housing to guide the sound energy introduced into the body member such that the sound energy is distributed with air and introduced into the body member; and a sound absorption material provided in the housing such that the sound absorption material is exposed through the openings, to absorb the sound energy introduced into the body member.

Description

[0001] The present invention relates to a sound attenuator for a duct,

The present invention relates to a silencer which is installed in a cooling tower or an air-conditioning apparatus, and is easy to change in accordance with the frequency of sound energy in which maintenance or sound absorption is performed.

Among the facilities of the building, the air conditioning equipment for the heating, cooling and ventilation of buildings is a core facility that is responsible for the health of the citizens and its importance is increasing day by day.

Air conditioning equipment uses air blowers to supply air to the internal parts of the building through the duct line with controlled temperature, humidity and cleanliness.

However, the duct line that serves as the air flow passage has a problem that the noise of the blower is introduced into the room through the noise transmission path. As a result, the noise of the blower transmitted through the duct line may cause discomfort to residents or workers in the building, and may result in lowering of concentration and lowering of the working efficiency, thus lowering the inherent effect of the air conditioner.

Duct silencers for air conditioning are widely used for the purpose of blocking the noise that has such a negative effect.

According to the prior art, various duct silencers have been proposed to reduce the noise transmitted along the duct line of an air conditioning installation. Conventional duct silencers are configured to reduce noise by arranging a perforated plate and a sound absorbing material in the form of a fibrous material in a rectangular outer casing. The conventional duct muffler has a problem that the sound absorbing material is shattered when the perforated plate is formed and dust is generated from the glass fiber.

Korean Utility Model No. 382863 registered on April 18, 2005, discloses a duct ventilator for air conditioning that uses plate-like foamed aluminum to provide a first sound absorbing effect and a porous polyester to provide a second sound absorbing effect .

11 is a detailed view of the structure of the ventilation duct muffler according to the Korean Registered Utility Model No. 382863.

In the related art duct muffler for air conditioning, a plurality of sound absorbing portions 20 and a boundary sound absorbing portion 30 are provided in a casing 10 made of metal, 1 sound absorbing material 26 and a second sound absorbing material 22 made of porous polyester.

The conventional air duct for muffler having the above-mentioned structure can solve the problem of the dust generated from the sound absorbing material to some extent. However, since the sound absorbing portion and the boundary sound absorbing portion provided in the longitudinal direction inside the outer casing are plate- It is necessary to replace at least one of the sound-absorbing portion and the boundary sound-absorbing portion according to the frequency at which the sound-absorbing performance is deteriorated or broken or the frequency for attenuating the noise-to- It is inconvenient.

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a sound- And to provide a silencer capable of increasing the efficiency.

According to an aspect of the present invention, there is provided a high-performance sound-absorbing silencer according to the present invention, including a body member, a sound absorbing member coupled to the body member so as to be inserted into the body member, A first sound absorbing member used for soundproofing and a draw bar inserted through a plurality of the first sound absorbing members and installed to allow the first sound absorbing member to go in and out of the body member, The air flow guide plate is formed on the front surface of the housing and is configured to distribute sound energy to the inside of the body member and to guide the air into the body member, And a sound energy supply unit installed in the housing so as to be exposed to the outside through the opening, And a first sound absorbing material for absorbing sound.

The body member includes a tubular body having a front surface and a rear surface opposed to each other, a second sound-absorbing member installed on the inner surface of the body and absorbing sound energy with the first sound-absorbing member, And a fixing bar installed at the rear of the body and being detachably coupled to the first sound-absorbing member.

The first sound-absorbing member may include a plurality of first sound-absorbing members and a plurality of second sound-absorbing members. The first sound-absorbing member may be configured to surround the first and second sound- It is preferable to be installed in an array.

In addition, the airflow guide plate may have a 'V' shape so that the sound energy introduced into the body member can be distributed to both sides, or a pyramid shape can be formed so that sound energy can be introduced both upward and downward .

According to the present invention, the first sound-absorbing member, which is different from the conventional one and is coupled to a plurality of the draw-out bars in plural, is configured to be able to move out of the body by movement of the draw bar, and each of the first sound- So that it is possible to replace the first sound absorbing member according to the frequency of the sound energy to be absorbed.

In addition, the air flow passage area, that is, the suction area of the sound energy is increased through the space portion formed to be connected to each other in the lateral and longitudinal directions, thereby minimizing the pressure loss value under the condition of the rated flow rate, thereby improving the efficiency of the air conditioner.

And a first sound absorbing member provided on the inner surface of the body, the first sound absorbing member being provided in a cell structure having a checkerboard arrangement inside the body, the first sound absorbing member being provided on both sides of the housing, 2 sound absorbing energy can be increased through the sound absorbing member to reduce the load of the silencer.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a diagram of a high performance sound-absorbing silencer according to the present invention.
2 is a view showing a body member of a high-performance sound-absorbing silencer according to the present invention.
3 is a view showing the connection between the second sound-absorbing member and the body according to Fig. 2;
4 is a rear view of a high-performance sound-absorbing silencer according to the present invention.
5 is a view showing a first sound-absorbing member and a draw-out bar for a high-performance sound-absorbing silencer according to the present invention.
Fig. 6 is a plan sectional view of Fig. 5; Fig.
7 is a front view of a high-performance sound-absorbing silencer according to the present invention.
8 is another embodiment of an airflow guide plate for a high performance sound-absorbing silencer according to the present invention.
FIG. 9 is a front view showing an airflow guide plate having different embodiments according to the high-performance sound-absorbing silencer according to the present invention. FIG.
10 is a view showing a state in which a first sound absorbing member is drawn out through a draw bar for a high performance sound absorbing silencer according to the present invention.
11 is a view showing a conventional muffler.

Hereinafter, a high-performance sound-absorbing silencer (hereinafter briefly referred to as a silencer) according to the present invention will be described in detail with reference to the accompanying drawings. Prior to the description, the silencer according to the present invention has been described for the purpose of soundproofing by installing a cooling tower or an air conditioner and absorbing sound energy, but this is merely an embodiment, and it is also possible to use a silencer Note that it is applicable.

1, the silencer 1 according to the present invention includes a body 100, a first sound-absorbing member 200, and a draw-out bar 300. As shown in FIG.

More specifically, as shown in FIGS. 2 to 4, the body member 100 includes a first sound absorbing member 200, which will be described later, and an air conditioning apparatus (not shown) A second sound absorbing member 120, and a fixing bar 130 in a configuration for providing a space in which air of the first sound absorbing member 120 can be collected.

For example, referring to FIG. 2, the body 110 is formed in a tubular shape with the front and rear surfaces thereof opened as a whole, and the outer surface thereof is fixed to the cooling tower, air conditioning equipment, A flange 113 having a fastening hole may be formed to protrude.

A plurality of second sound-absorbing members 120 are provided on the inner surface of the body 110 so as to face each other to maximize the effect of sound absorption together with the first sound-absorbing member 200 .

In addition, the vertical width of the front surface of the opened body 110 may be formed to have the same length as the vertical length of the draw-out bar 300 so that the upper and lower ends of the draw- (Not shown) into which the upper end and the lower end of the drawing bar 300 can be fitted, respectively, so that the drawing bar 300 can be detached and attached to the body 110 stably without changing its shape.

Referring to FIG. 3, the second sound-absorbing member 120 is provided on the inner surface of the body 110 to absorb sound energy together with the first sound-absorbing member 200 described later to maximize soundproofing effect.

For example, the second sound absorbing member 120 installed on the inner surface of the body 110 may be fixedly mounted on the body 110. However, as shown in FIG. 3, the second sound absorbing member 120 may be slidably inserted into the body 110, So that maintenance can be facilitated.

The second sound absorbing member 120 slidably installed on the body 110 may be exposed to the inside of the body 110 through the moving plate 121 having the opening 125 and the opening 125 And a second sound absorbing material 123 installed on the moving plate 121 so that the moving plate 121 is inserted into the body 110. The body 110 has an insertion groove 111 into which the moving plate 121 is movably inserted.

The detailed description of the second sound absorbing material 123 is similar to that of the first sound absorbing material 230 described later and will be described in more detail in the first sound absorbing material 230 described below.

4, the fixing bar 130 has a length in the vertical direction as a whole, and a large number of the fixing bars 130 are installed on the rear surface of the body 110 to connect the outer surface of the first sound absorbing member 200, which is introduced into the body 110, As shown in Fig.

At this time, the fixing bar 130 is installed facing the take-out bar 300 installed on the front surface of the body 110 so as to facilitate the connection of the first sound-absorbing member 200. The upper and lower parts are respectively fastened by fastening means The fixing bar 130 may be fixed at a position where the first sound absorbing member 200 is pulled out of the body 110 through the withdrawing bar 300 in combination with the body 110. [

The fixing bar 130 and the first sound absorbing member 200 or the fixing bar 130 and the body 110 are coupled through separate brackets 131 and fastening means, Shaped so as to surround the outer surface of the bar 130 as a whole.

5 to 7, the first sound-absorbing member 200 may absorb sound energy introduced into the body 110 together with the second sound-absorbing member 120 so as to have a soundproof effect And may include a housing 210, an airflow guide plate 220, and a first sound absorbing material 230.

5 and 6, the housing 210 is formed so as to have a rectangular parallelepiped shape as a whole, and an opening 211 is formed on the outer surface except for the front surface and the rear surface so that the first sound absorbing member 200 is inserted into the body 110 To absorb the incoming sound energy.

An airflow guide plate 220 is provided on the front surface of the housing 210 and a rear surface of the housing 210 is detachably coupled to the fixing bar 130 so that the housing 210 can be detachably fixed to the body 110.

At this time, at least one of the front surface and the rear surface of the housing 210 may be opened and closed through the fastening means so that the first sound absorbing member 200 can be easily installed and maintained Do.

Further, as shown in the figure, a plurality of housings 210 are installed inside the body 110 to enhance the sound absorption effect and easily introduce sound energy into the body 110 through the first and second sound absorbing members 120 and 120 So that a space S having a shape extending in the vertical and horizontal directions can be formed between the respective housings 210 so that sound absorption can be performed.

That is, it is possible to enlarge the air flow passage area (air space) by forming the space portion S in a lattice shape so as to be connected to each other in the transverse direction and the longitudinal direction, and the rated flow condition The pressure loss value can be minimized to improve the efficiency of the connected air conditioner system.

7, the airflow guide plate 220 is configured to distribute the sound energy flowing into the front surface of the body 110 so that the sound energy can be absorbed through the plurality of first sound absorbing members 200. Referring to FIG.

For example, the airflow guide plate 220 has a V shape as a whole, and the corner portion 221 is installed to face the front of the body 110, so that the sound energy flowing through the front of the opened body 110 passes through the housing 210, So that the sound is absorbed by the first sound absorbing material 230 after being introduced into the body 110 through the space S to be distributed to both sides.

At this time, upper and lower surfaces of the airflow guide plate 220 are respectively opened so that a drawing bar 300 to be described later can be inserted therethrough, and if necessary, a fixing pipe (not shown) 223 are formed on the body 110 so that the first sound-absorbing member 200 can easily move inside / outside the body 110.

In addition, the airflow guide plate 220 is formed to have a pyramid shape in which a vertex is formed in front of the body 110 in addition to a 'V' shape that is capable of distributing sound energy to both sides. It is also possible to distribute the sound energy even in the up / down direction to enhance the effect of sound absorption (see Fig. 8).

At this time, in the case of the airflow guide plate 220 'having the pyramid shape, the airflow guide plate 220 located in the uppermost zone Z1 and the lowermost zone Z2 in the state of being inserted into the body 110, So that sound energy to be introduced into the body 110 can be prevented from being distributed to the outside of the body 110 (refer to FIG. 9).

Of course, in the above case, the space S is not formed on the upper or lower portion of the airflow guide plate 220 located in the uppermost zone Z1 and the lowermost zone Z2, or the area of the space S is narrow It will be understood by those of ordinary skill in the art to which the present invention pertains.

In addition, the pyramid-shaped airflow guide plate 220 'has a fixing pipe 223' extending from the upper surface to the lower surface of the airflow guide plate 220 'so as to penetrate and insert the drawer bar 300, .

The first sound absorbing material 230 is installed to be exposed to the outside through a plurality of openings 211 formed on the outer surface of the housing 210 so as to absorb sound energy introduced into the housing 210.

For example, the first sound absorbing material 230 is installed in the housing 210 so that the first sound absorbing material 230 has a rectangular frame shape or a plate shape as a whole so as to have a shape corresponding to the inner shape of the hollow housing 210, .

That is, when the sound absorbing function of the first sound absorbing material 230 has a rectangular frame shape, if the function of the sound absorbing function is deteriorated on one of the surfaces, the entire first sound absorbing material 230 needs to be replaced. However, , It is possible to replace only the deteriorated parts, thereby making it possible to economically benefit as well as maintenance.

The same material as the first sound absorbing material 230 and the second sound absorbing material 123 may be the same or different types of sound absorbing materials. The sound absorbing material may include a small bubble or a thin tubular perforation A sound absorbing material (a sound absorbing material, a glass wool, a polyester, etc.) which absorbs sound energy by converting the sound energy into heat energy through friction due to the vibration, , Sound-absorbing materials using fibrous materials of wood, etc.), plate-like sound-absorbing materials which allow sound waves of sound energy to consume sound energy while vibrating the plate, and a hard plate through which a number of holes are passed, (Sound-absorbing block, sound-absorbing diffusing plate), which is characterized in that the sound-absorbing material Can.

The sound absorption area of the silencer 1 according to the present invention can be increased through the shape and structure of the first sound absorbing member 200 coupled with the body 110 to improve the noise reduction performance, It is possible to minimize the load of the silencer 1 and to improve the efficiency of the silencer 1. In addition,

5 and 10, the first absorber 200 coupled with the plurality of first absorptive members 200 is coupled to the body 300 through the withdrawal bar 300, (110) so as to facilitate entry and exit.

For example, the drawer bar 300 is formed to have a bar shape having a length in a vertical direction, and is coupled to the outer surface of the drawer bar 300 so as to be inserted into a fixing pipe 223 formed in at least two airflow guide plates 220, 1 sound-absorbing member 200 to / from the body 110 through the draw-out bar 300.

At this time, the upper end and the lower end of the drawing bar 300 are inserted into the open end of the front face of the body 110 in an interference fit manner so that the drawer bar 300 can be detachably coupled to the body 110, Accordingly, a fitting pad (not shown) made of a rubber material is provided at the upper and lower ends of the drawing bar 300 to prevent the durability of shape change and the like from being deteriorated when friction occurs due to interference with the body 110 desirable.

The silencer 1 according to the present invention having the above-described structure is different from the conventional one in that the first sound absorbing member 200 coupled to a plurality of the outgoing bars 300 by the movement of the draw- Each of the first sound absorbing members 200 is configured to be individually replaceable with the corresponding outgoing bar 300, so that the first sound absorbing member 200 can be replaced or removed according to the frequency of sound energy to be absorbed. The first sound absorbing member 200 can be replaced and used.

In addition, the airflow passage area, that is, the suction area of the sound energy is increased through the space S formed to be connected to each other in the transverse direction and the longitudinal direction to minimize the pressure loss value under the condition of the rated flow rate, .

And a first sound absorbing member 230 having a first sound absorbing member 230 disposed at an opening portion including upper and lower surfaces as well as both sides of the housing 210, 200 and the second sound-absorbing member 120 provided on the inner surface of the body 110 to increase the opening area through which the sound energy for sound absorption is introduced, thereby reducing the load of the silencer 1. [

As described above, the present invention has been described with reference to particular embodiments, such as specific elements, and specific embodiments and drawings. However, it should be understood that the present invention is not limited to the above- And various modifications and changes may be made thereto by those skilled in the art to which the present invention pertains.

Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .

1: High-performance sound-absorbing silencer according to the present invention
100: body member 110: body
120: second sound absorbing member 130: fixed bar
200: first sound absorbing member 210: housing
220: airflow guide plate 230: first sound absorbing material
300: withdrawal bar S:

Claims (4)

A body member (100);
A first sound absorbing member (not shown) is detachably coupled to the body member 100 so that a large number of the sound absorbing members are inserted into the body member 100 and sound energy absorbed by the body member 100 is absorbed, 200); And
And a take-out bar (300) inserted through a plurality of the first sound-absorbing members (200) and installed so that the first sound-absorbing member (200) can be inserted into / out of the body member (100)
The first sound absorbing member 200 includes a housing 210 having a hollow body shape and having openings 211 on upper, lower, left and right sides thereof, a body 210 formed on the front surface of the housing 210, An airflow guide plate 220 for distributing the sound energy to the inside of the body member 100 and allowing the sound energy to be introduced into the body member 100 through the opening 211, And a first sound absorbing material (230) provided on the body member (100) for absorbing sound energy introduced into the body member (100)
The body member 100 includes a tubular body 110 having a front surface and a rear surface opposed to each other and a tubular body 110 disposed on the inner surface of the body 110 and adapted to absorb sound energy together with the first sound- 2 sound absorbing member 120 and a fixing bar 130 installed at the rear of the body 110 so as to face the drawing bar 300 and detachably coupled to the first sound absorbing member 200,
The first sound absorbing member 200 may be configured such that sound energy introduced into the body member 100 is absorbed by the first sound absorbing member 200 and the second sound absorbing member 120, 100 are arranged in a checkerboard manner so that adjacent space portions S can form a lattice shape,
The second sound absorbing member 120 is provided in an opening 125 formed in a plate-shaped moving plate 121. The moving plate 121 is inserted into an insertion groove formed in the inner surfaces of the body 110, (111) in a slidable manner,
Wherein the first sound absorbing material (230) is installed in a plate shape to facilitate replacement of the plurality of openings (211).
delete delete The method according to claim 1,
The airflow guide plate (220)
V 'shape or sound energy may be applied to both sides of the housing 210 as well as to both sides of the airflow guide plate 220 with respect to the airflow guide plate 220 so that the sound energy introduced into the body member 100 can be distributed to both sides, (Or air space) of the sound energy flowing into the housing 210. The air space of the housing 210 is formed in the shape of a pyramid so as to be able to flow into the lattice- Wherein a pressure loss value of the sound energy introduced into the compressor (210) is minimized to prevent a reduction in the efficiency of the air conditioner system.

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