KR20190129309A - Acoustic pannel assembly to improve sound absorption performance of low frequency band using a band resonance panel and acoustic pannel assdmbly construction method thereof - Google Patents

Abstract

The present invention relates to a sound absorption assembly, which includes: a sound adsorption unit spaced apart from a wall or a ceiling by a certain interval and absorbing a noise; a perforated plate coupled to an inner wall surface of the sound absorption unit facing the wall or the ceiling and formed with a plurality of sound penetrating holes selectively penetrating incident sound which is incident through the sound absorption unit at a plate surface; a pair of fixing brackets provided on both sides while having a certain interval at front surfaces of the wall and the ceiling; and a plurality of one-touch detachable brackets coupled to the pair of fixing brackets in a vertical direction side by side. Both sides of the perforated plate are formed with a vertically bent coupling leg with certain length. The perforated plate allows the coupling leg to be elastically inserted and coupled to a front end of the one-touch detachable bracket.

Description

Acoustic plate assembly with improved low frequency sound absorption performance using band resonance plate and construction method thereof

The present invention relates to a sound absorbing plate assembly, and more particularly, to a sound absorbing plate assembly and a construction method thereof, which are coupled to a wall or a ceiling to improve sound absorbing performance of a low frequency band as well as high frequency band sound absorbing performance.

Polyester or polyurethane foam is used for indoor noise reduction panels currently being developed. Panels of such materials have good sound absorption performance, but are disadvantageous to humans and are not environmentally friendly. In particular, it is not suitable for indoor noise countermeasure because a large amount of harmful gas is generated in case of fire.

Accordingly, the use of sound absorbing materials using eco-friendly paper is increasing. 1 (a) is an exemplary view showing a cross-sectional configuration of a conventional sound absorbing plate 10.

Conventional sound absorbing plate 10 as shown is installed spaced apart from the ceiling or wall (M) by a predetermined distance. As a result, an air layer B is formed between the sound absorbing plate 10 and the ceiling or the wall M to absorb incident sound to improve sound absorption performance.

At this time, the conventional sound absorbing plate 10 couples the sound reflection plate 13 to the inside of the sound absorbing material 11 to further improve the sound absorbing performance. The music reflector 13 reflects the incident sound S1 incident on the sound absorbing material 11 from the outside as shown. As a result of the reflection, sound energy inside the sound absorbing material 11 is dissipated as heat energy, and the sound energy is attenuated, so that the reflected sound S2 has a smaller intensity than the incident sound S1, thereby improving sound absorption performance.

Figure 1 (b) is a graph showing the sound absorption performance of the conventional sound absorbing plate 10. As shown, the conventional sound absorbing plate 10 can be seen that the noise reduction frequency band is over the middle frequency and high frequency band of 1000HZ or more. That is, it can be seen that the sound absorbing area is distributed in the middle frequency band and the high frequency band, but the sound absorption performance of the low frequency band is low.

Accordingly, it is required to develop a sound absorbing plate having a new structure that can extend the sound absorbing bandwidth to the low frequency band.

Korea Utility Model Registration No. 20-0483883

SUMMARY OF THE INVENTION An object of the present invention is to provide a sound absorbing plate assembly capable of reliably reducing low frequency noise and a construction method thereof, which can solve the above problems.

Another object of the present invention is to provide a sound absorbing plate assembly and a construction method thereof that can be installed on a wall or ceiling in a convenient manner.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention by those skilled in the art.

An object of the present invention can be achieved by a sound absorbing plate assembly which is installed on a wall or ceiling in the room to absorb noise. The sound absorbing plate assembly of the present invention is disposed at a predetermined distance from the wall or ceiling to absorb sound. Wow; It includes a porous plate coupled to the inner wall surface of the sound absorbing portion facing the wall or the ceiling, a plurality of sound through holes for selectively passing the incident sound incident through the sound absorbing portion on the plate surface, the sound absorbing portion, spaced apart A pair of sound absorbing materials disposed; It is characterized in that it comprises a support frame disposed between the sound absorbing material to maintain the shape of the sound absorbing material.

According to one embodiment, the aperture ratio in which the plurality of sound through holes 121 are formed in the porous plate 120 is formed in a range of 0.5 to 10%.

According to one embodiment, the sound through hole is formed to gradually increase in diameter from the sound inlet through which the incident sound is introduced in contact with the sound absorbing portion from the sound inlet through which the incident sound is discharged.

According to an embodiment, the sound through hole is coupled to the sound through hole toward the wall or the ceiling, and the longer the length of the sound through tube can improve the sound absorption performance of the low frequency band.

On the other hand, the object of the present invention can be achieved by the sound absorbing plate assembly which is installed on the wall or ceiling of the room to absorb the noise. Sound absorbing plate assembly of the present invention, the sound absorbing portion which is disposed spaced apart from the wall or ceiling at a predetermined interval to absorb the noise; A porous plate coupled to the inner wall surface of the sound absorbing unit facing the wall or the ceiling, and having a plurality of sound through holes for selectively passing incident sound incident through the sound absorbing unit on a plate surface; A pair of fixing brackets disposed at both sides at predetermined intervals in front of the wall and the ceiling; It includes a plurality of one-touch detachable brackets coupled side by side in a vertical direction to the pair of fixing brackets, the coupling legs formed vertically bent on both sides of the porous plate is formed a predetermined length, the porous plate of the one-touch detachable bracket It characterized in that the coupling leg is elastically fitted to the front end.

According to one embodiment, the one-touch detachable bracket is a vertical frame having a certain length of the cross-section "c" shape, and as long as the coupling leg is elastically opened or pinched on the open end of the vertical frame. It includes a pair of leg accommodating pawl, the end of the leg accommodating pawl is formed in a predetermined area on both sides so as to be dozed by the end of the pair of leg accommodating pawl to be provided with an insertion wing for guiding the coupling leg to the leg accommodating pawl Can be.

On the other hand, the object of the present invention can be achieved by the sound absorbing plate assembly construction method. The sound absorbing plate assembly construction method of the present invention includes the steps of preparing a sound absorbing plate assembly in which the porous plate and the sound absorbing portion are combined; Fixing a pair of fixing brackets on both sides of the ceiling or wall; fixing the position by fitting both ends of the plurality of one-touch mounting brackets to the pair of fixing brackets; It characterized in that it comprises the step of elastically fitting the coupling legs bent on both sides of the porous plate to the one-touch detachable bracket.

According to one embodiment, the step of elastically fitting the coupling leg to the one-touch detachable bracket,

Arranging and pressing the coupling leg between a pair of insertion blades of the one-touch detachable bracket; The pair of insertion blades may be opened while guiding the coupling leg to the inside, and the coupling leg may be elastically fitted between the leg accommodation pins of the one-touch detachable bracket, and the position may be fixed.

In the sound absorbing plate assembly according to the present invention, the porous plate having a plurality of sound through holes formed therein is coupled to the sound absorbing portion. The porous plate selectively enters the incident sound and improves the sound absorption performance of low frequency noise by diversifying the incident path of the incident sound.

In addition, when the sound through-hole is coupled to the sound through-hole, there is an effect that can further improve the sound absorption performance of low-frequency noise.

In addition, the perforated plate can be constructed in one-touch manner on the one-touch mounting bracket by forming a coupling leg on both sides. The construction of the sound absorbing plate assembly can be shortened by the one-touch construction.

1 is a schematic diagram schematically showing the configuration of a conventional sound absorbing material and a graph showing the performance of the sound absorption;
Figure 2 is a schematic diagram schematically showing the configuration of a sound absorbing plate assembly according to a first embodiment of the present invention,
3 is an exploded perspective view showing an exploded configuration of the sound absorbing plate assembly according to the first embodiment of the present invention;
4 is a schematic view schematically showing the configuration of the sound absorbing plate assembly according to the second embodiment of the present invention and the structure of the sound absorbing plate assembly according to the third embodiment;
5 is a schematic diagram schematically showing a configuration of a sound absorbing plate assembly according to a fourth embodiment of the present invention;
6 is a graph showing the sound absorption performance of the sound absorbing plate assembly according to the first embodiment of the present invention;
7 is a graph showing the sound absorption performance of the sound absorbing plate assembly of the second embodiment and the third embodiment of the present invention;
8 is a schematic view showing the configuration of a sound absorbing plate assembly according to a fifth embodiment of the present invention and a graph showing sound absorption performance.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiment of the present invention may be modified in various forms, the scope of the invention should not be construed as limited to the embodiments described in detail below. This embodiment is provided to more completely explain the present invention to those skilled in the art. Therefore, the shape of the elements in the drawings and the like may be exaggerated to emphasize a more clear description. It should be noted that the same members in each drawing are sometimes shown with the same reference numerals. Detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention are omitted.

2 is a schematic view showing a state in which the sound absorbing plate assembly 100 according to the first embodiment of the present invention is installed on the wall or ceiling M, and FIG. 3 is a view of the sound absorbing plate assembly 100 according to the first embodiment. An exploded perspective view showing the disassembled configuration.

As shown, the sound absorbing plate assembly 100 according to the first embodiment is coupled to the sound absorbing unit 110 and the inner wall surface of the sound absorbing unit 110, which are installed at a predetermined interval on the wall or ceiling 200, and the incident sound ( It includes a porous plate 120 to control the passage of S1) to improve the sound absorption performance.

The porous plate 120 is fixed to the wall or ceiling 200 by the support 210. The porous plate 120 is coupled to the sound absorbing portion 110 by a fastening member such as a bolt.

As shown in FIG. 3, the sound absorbing unit 110 supports the front sound absorbing material 111 and the rear sound absorbing material 115 and the front frame sound absorbing material 111 and the rear sound absorbing material 115 which are disposed to be spaced apart from each other. It includes.

The front sound absorbing material 111 and the rear sound absorbing material 115 may be formed of paper, fibers, or nonwoven fabric. The support frame 113 supports to maintain the shape of the front sound absorbing material 111 and the rear sound absorbing material 115. At this time, the support frame 113 is preferably formed in a grid form in consideration of the inflow of the incident sound (S1) and the discharge of the reflected sound (S2).

The porous plate 120 is formed of a plate material and is coupled to the rear sound absorbing material 115. The porous plate 120 may be formed of a wood or metal plate capable of reflecting sound. On the surface of the porous plate 120, a plurality of sound through holes 121 for selectively passing the incident sound S1 to adjust sound absorption performance are formed therethrough.

The conventional sound absorbing plate 10 shown in FIG. 1 has only one path in which the incident sound S1 is reflected by the sound reflection plate 13 and exits the reflected sound S2.

On the other hand, when the porous plate 120 having a plurality of sound through holes 121 are installed as in the present invention, as shown in FIG. 2, part of the incident sound S1 hits the porous plate 120 and is reflected. And the intensity is reduced to the reflected sound (S2), and part of the incident sound (S3) is introduced into the porous plate 120 through the sound through hole 121 and then hit the wall 200 and the sound through hole 121 again Come out to the path (S4) discharged to, and part of the incident sound (S5) is reflected on the wall 200 through the sound passage hole 121 and then undergoes a process that is diffusely reflected between the air layer (B) and the wall to mute. . In addition, a part of the incident sound S6 may be incident in the vertical direction through the sound passage hole 121 to move in the horizontal direction inside the air layer.

That is, in the sound absorbing plate assembly 100 according to the first embodiment of the present invention, the incident sound S1 is incident and reflected by various paths by the plurality of sound through holes 121 formed in the porous plate 120. In this process, the low-frequency band as well as the medium frequency is absorbed to improve the sound absorption performance.

Here, the sound through hole 121 is preferably formed in a trapezoidal cross-sectional shape as shown in an enlarged view in FIG. That is, the sound passage hole 121 is preferably formed in a shape inclined so that the diameter r2 of the sound discharge port 121b side is larger than the diameter r1 of the oil inlet hole 121a side.

The diameter of the sound passage hole 121 is gradually increased to increase the diameter of the sound discharge port (r2) to reduce the probability that the incident sound (S1) flowing through the sound inlet (r1) is immediately reflected and discharged The sound S1 propagates well to the air layer B so as to induce the diffuse reflection between the walls 200.

FIG. 6 is a graph illustrating a sound absorption performance of the sound absorbing plate assembly 100 according to the first embodiment and a sound absorption performance of the conventional sound absorbing plate 10. Sound absorbing performance is performed by installing a microphone under the sound absorbing unit 110 to measure the intensity of the incident sound (S1) and the reflected sound (S2).

In the sound absorbing plate assembly 100 according to the first embodiment of the present invention, the thickness W of the air layer B is 50 mm, the thickness m of the sound absorbing part 110 is 10 mm, and the sound through hole is formed in the porous plate 120. 121) is the result of the experiment was designed to 2.3%.

The conventional sound absorbing plate 10 was designed and tested in the same manner as the sound absorbing plate assembly 100 of the first embodiment of the present invention by designing the thickness W of the air layer B to 50 mm and the thickness of the sound absorbing part 110 to 10 mm.

Graph A is a graph showing the sound absorption performance of the conventional sound absorbing plate 10, graph B is a graph showing the sound absorption performance of the sound absorbing plate assembly 100 of the first embodiment of the present invention. Here, the higher the sound absorption coefficient, the better the sound absorption performance.

As shown in graph A, it can be seen that the conventional sound absorbing plate 10 has excellent sound absorption performance in the middle frequency and the high frequency band of 1000 Hz to 4000 Hz. On the other hand, it can be seen that the low frequency sound absorption performance of less than 1000Hz is not good.

On the other hand, as shown in the graph B of the present invention, the sound absorbing plate assembly 100 according to the first embodiment shows slightly lower sound absorption performance than the conventional sound absorbing plate 10 in the medium frequency and the high frequency band, but also has a high low frequency sound absorption performance of less than 1000 Hz. It can be seen that.

That is, it can be seen that low frequency noise is reliably reduced while passing the incident sound S1 through the sound passing hole 121 of the porous plate 120 or by diffusely reflecting the light.

Here, the position of the low frequency band of the sound absorbing performance graph may be adjusted according to the aperture ratio at which the sound passage hole 121 is formed in the porous plate 120. The opening ratio may be formed in the range of 0.5 to 10%. If the aperture ratio is higher than 10%, the low frequency sound absorption performance is lowered.

On the other hand, if the opening ratio is gradually lowered at 10%, the sound absorption performance graph can be moved toward the low frequency to further improve the low frequency noise reduction effect.

When the aperture ratio is lower than 0.5%, the sound absorbing performance is close to that of the conventional sound absorbing plate 10 without the porous plate 120.

On the other hand, Figure 4 is a schematic diagram showing the configuration of a sound absorbing plate assembly 100a according to a second embodiment of the present invention. The sound absorbing plate assembly 100a according to the second embodiment of the present invention is compared with the sound absorbing plate assembly 100 according to the first embodiment described above, the sound passing tube having a predetermined length in the sound passing hole 121 of the porous plate 120 ( 130 is vertically coupled.

Sound tube 130 is to act as a resonator. As a result, when the incident sound S1 is introduced into the sound passage 130, the sound is dissipated in the throat of the resonator, thereby reducing the noise. Then, the sound passing through the sound passage 130 passes through the air layer (B) inside the noise is reduced once more.

Here, the longer the length of the sound passage 130 is effective to reduce the low frequency noise. As a result, the low frequency sound absorbing performance may be further improved than the sound absorbing plate assembly 100 according to the first embodiment.

This sound absorption performance can be seen through the sound absorption performance graph shown in FIG. In the sound absorbing plate assembly 100a of the second embodiment, the thickness W of the air layer B is 50 mm, the thickness of the sound absorbing part 110 is 10 mm, and the aperture ratio at which the sound through holes 121 are formed in the porous plate 120 is formed. Is the result of experiment with 2.3%.

When the sound absorbing performance graph C of the sound absorbing plate assembly 100a of the second embodiment is compared with the sound absorbing performance graph A of the conventional sound absorbing plate 10, and compared with the sound absorbing performance graph B of the sound absorbing plate assembly 100 of the first embodiment of FIG. It can be seen that the low frequency sound absorption area of the sound absorbing performance graph C of the sound absorbing plate assembly 100a of the second embodiment is wider.

As a result, the sound absorbing performance of the low frequency noise is improved by the role of the resonator of the sound passing tube 130.

On the other hand, Figure 4 (b) is a schematic diagram schematically showing the configuration of the sound absorbing plate assembly 100b according to the third embodiment. The sound absorbing plate assembly 100 b according to the third embodiment is a control for comparing with the sound absorbing plate assembly 100 a according to the second embodiment. The structure includes only the porous plate 120 and the sound passage 130 without the sound absorbing part 120. to be.

FIG. 7B is a graph showing the sound absorbing performance of the sound absorbing plate assembly 100b according to the third embodiment compared with the sound absorbing performance of the conventional sound absorbing plate 10.

As shown in the graph D of the sound absorbing plate assembly 100b according to the third embodiment, it can be seen that the low frequency sound absorbing performance is good while the low frequency sound absorbing performance is low as opposed to the graph A of the conventional sound absorbing plate 10.

Through the experimental results, the sound absorbing unit 110 can improve the sound absorption performance of the medium frequency and the high frequency, and it can be clearly seen that the porous plate 120 and the sound passage 130 function to improve the low frequency noise.

On the other hand, Figure 5 is a perspective view showing the installation structure of the sound absorbing plate assembly 100c according to the fourth embodiment of the present invention.

The sound absorbing plate assembly 100c according to the fourth embodiment uses the fixing bracket 140 and the one-touch detachable bracket 150 for convenience in construction.

Sound absorbing plate assembly (100, 100a, 100b) of the embodiments described above is a porous plate 120 is coupled to the support 210 of the ceiling or wall 200, the sound absorbing unit 110 to the fastening member 120 to the fastening member It is constructed in the form of being joined by.

However, since the ceiling or wall 200 has a large area, it takes a considerable time to separately install the plurality of porous plates 120 and the sound absorbing portion 110.

The sound absorbing plate assembly 100c according to the fourth embodiment proposes a method of fitting the porous plate 120 by one-touch method in order to shorten the construction time.

Although only the porous plate 120 is shown in the drawing, this is for convenience of description, and the sound absorbing unit 110 is fastened by a fastening member (not shown) on the front surface of the porous plate 120.

Install a pair of fixing brackets 140 above and below the wall. Then, a plurality of one-touch detachable brackets 150 are installed in a direction perpendicular to the fixing bracket 140. At this time, the upper and lower portions of the one-touch detachable bracket 150 are inserted into the fixing bracket 140 to fix the position of the one-touch detachable bracket 150.

The fixing bracket 140 is formed in the shape of a bar having a cross-section "c". The one-touch detachable bracket 150 is fitted through the open end of the fixing bracket 140.

The one-touch attachment and detachment bracket 150 includes a vertical frame 151 having a cross-section having a “C” shape and a pair of leg accommodation pins 153 extended to the vertical frame 151 as shown in an enlarged view. The pair of leg receiving pins 153 extends to an open end of the vertical frame 151 and is coupled to the porous plate 120.

Here, the porous plate 120a has a coupling leg 123 bent at both sides, unlike the porous plate 120 of the other embodiments described above. Coupling leg 123 is formed to have a predetermined length is inserted into the leg receiving cage 153.

The pair of leg receiving pawls 153 are retracted or spread elastically and accommodate the coupling legs 123 therein. The pair of leg accommodating pawls 153 are each formed in a semicircular shape to secure a space into which the coupling leg 123 is fitted.

At this time, a pair of insertion blades 153a formed to be bent in opposite directions to each other are formed at the end of the leg receiving clamp 153.

Insertion blade 153a is formed to have a predetermined area, it is formed to have a curved surface toward the leg receiving cage 153. As a result, when the user pushes the coupling leg 123 between the pair of insertion blades 153a, the user may be guided along the curved surface of the insertion blade 153a and inserted into the leg receiving cage 153.

That is, the user is elastically accommodated in the leg receiving cage 153 by the coupling leg 123 by the operation of pushing the coupling leg 123 of the porous plate 120 between the insertion blade 153a without a separate fastening member. Is fixed.

The user pushes the coupling leg 123 of the porous plate 120 into the pair of one-touch detachable brackets 150 and then moves the porous plate 120 downward to engage the porous plate 120 from below. The porous plate 120 is slidably moved up and down by the pressure of the user in a state in which the coupling leg 123 is fitted to the leg receiving cage 153.

At this time, when the three one-touch detachable brackets 150 are disposed as shown in FIG. 5, the coupling legs 123 of the pair of porous plates 120 disposed on both sides of the one-touch detachable brackets 150 located at the center thereof are disposed. It will fit together.

On the other hand, Figure 8 is a view showing the configuration and sound absorption performance of the suction plate assembly 100d according to the fifth embodiment of the present invention.

As compared with the sound absorbing plate assembly 100a according to the second embodiment, the sound absorbing plate assembly 100d according to the fifth embodiment has a sound passing tube 160 formed in the shape of a fallopian tube. That is, while the sound passing tube 130 according to the second embodiment is formed in the shape of a cylindrical tube having the same diameter, the sound passing tube 160 according to the fifth embodiment has an upper diameter d2 than the lower diameter d1. It is formed in the form of large fallopian tubes.

When the sound passage tube 160 is formed in the shape of a larger fallopian tube in the upper part, the room sound is better sent to the ceiling than the straight sound passage tube 130, thereby reducing the probability that the sound incident to the ceiling is returned to the room again. . This acoustically uses the acoustic impedance mismatch principle.

This sound absorption performance can be seen through the sound absorption performance graph shown in FIG. In the sound absorbing plate assembly 100d of the fifth embodiment, the thickness W of the air layer B is 50 mm, the thickness of the sound absorbing part 110 is 10 mm, and the aperture ratio through which the sound through holes 121 are formed in the porous plate 120 is formed. Is the result of experiment with 2.3%.

The sound absorption performance graph F of the sound absorption plate assembly 100d of the fifth embodiment is compared with the sound absorption performance graph A of the conventional sound absorption plate 10, and the sound absorption performance graph C of the sound absorption plate assembly 100a of the second embodiment of FIG. Compared with, it can be seen that the low frequency sound absorption area of the sound absorbing performance graph F of the sound absorbing plate assembly 100d of the fifth embodiment is wider.

As a result, the sound absorbing performance of low frequency noise is improved by the shape of the fallopian tube of the sound passing tube 160.

As described above, in the sound absorbing plate assembly according to the present invention, a porous plate having a plurality of sound through holes formed therethrough is coupled to the sound absorbing portion. The porous plate selectively enters the incident sound and improves the sound absorption performance of low frequency noise by diversifying the incident path of the incident sound.

In addition, when the sound through-hole is coupled to the sound through-hole, there is an effect that can further improve the sound absorption performance of low-frequency noise.

In addition, the perforated plate can be constructed in one-touch manner on the one-touch mounting bracket by forming a coupling leg on both sides. The construction of the sound absorbing plate assembly can be shortened by the one-touch construction.

On the other hand, the one-touch detachable bracket 150, the fixed bracket 140 of the metal material may be applied to the anti-corrosion coating layer to prevent corrosion of the metal surface, the coating material is 20% by weight of tritriazole, benzimi It is composed of 15% by weight of dazole, 10% by weight of trioctylamine, 15% by weight of hafnium, 40% by weight of aluminum oxide, and the coating thickness is 8㎛.

Tolyltriazole, benzimizol and trioctylamine serve as corrosion protection and discoloration prevention.

Hafnium is a corrosion-resistant transition metal element that serves to have excellent water resistance and corrosion resistance.

 Aluminum oxide is added for the purpose of fire resistance, chemical stability, and the like.

The reason for limiting the numerical value and the coating thickness of the components as described above, the inventors have analyzed through the test results several times, showed the optimum corrosion protection effect in the ratio.

In addition, the porous plate 120 may be formed with an antifouling coating layer coated with an antifouling coating composition so as to effectively prevent adhesion and removal of contaminants.

The antifouling coating composition includes alkanolamide and ampopropionate in a molar ratio of 1: 0.01 to 1: 2, and the total content of alkanolamide and ampopropionate is 1 to 10 based on the total aqueous solution. Weight percent.

The alkanolamide and ampopropionate have a molar ratio of 1: 0.01 to 1: 2, and when the molar ratio is out of the above range, the coating property of the substrate decreases or the moisture adsorption of the surface after application increases the coating film. There is a problem that is eliminated.

The alkanolamide and ampopropionate have a problem in that 1 to 10% by weight of the total composition aqueous solution is preferred. If the content is less than 1% by weight, the applicability of the substrate is lowered. Precipitation is likely to occur due to an increase.

On the other hand, it is preferable to apply | coat by the spray method as a method of apply | coating this antifouling coating composition on a base material. The final coating film thickness on the substrate is preferably 500 to 2000 kPa, more preferably 1000 to 2000 kPa. If the thickness of the coating film is less than 500 kPa, there is a problem of deterioration in the case of high temperature heat treatment, and if the thickness of the coating film exceeds 2000 kPa, crystal precipitation of the coated surface is liable to occur.

In addition, the present antifouling coating composition may be prepared by adding 0.1 mol of alkanolamide and 0.05 mol of ampopropionate to 1000 ml of distilled water, followed by stirring.

Embodiments of the sound absorbing plate assembly of the present invention described above are merely exemplary, and those skilled in the art will appreciate that various modifications and equivalent other embodiments are possible therefrom. There will be. Therefore, it will be understood that the present invention is not limited to the forms mentioned in the above detailed description. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims. It is also to be understood that the present invention includes all modifications, equivalents, and substitutes within the spirit and scope of the invention as defined by the appended claims.

100: sound absorbing plate assembly 110: sound absorbing part
111: front sound absorbing material 113: support frame
115: rear sound absorbing material 120: porous plate
121: sound passage 123: coupling legs
130: sound tube 140: fixed bracket
150: one-touch removable bracket 151: vertical frame
153: leg receptacle 153a: insertion blade
200: ceiling 210: support
B: air layer
S1: incident sound
S2: reflections
S3: sound pain
S4: Sound pain and common sound
S5: diffuse reflection
S6: pass sound
S7: sound tube resonance sound

Claims (8)

In the sound absorbing plate assembly which is installed on the wall or ceiling of the room to absorb noise,
A sound absorbing unit (110) disposed at a predetermined interval from the wall or ceiling to absorb noise;
Is coupled to the inner wall surface of the sound absorbing unit 110 facing the wall or ceiling, a plurality of sound through holes 121 for selectively passing the incident sound incident through the sound absorbing unit 110 on the plate surface is formed Including a porous plate 120,
The sound absorbing unit 110,
A pair of sound absorbing materials 111 and 115 spaced apart from each other;
Sound absorbing plate assembly comprising a support frame (113) disposed between the sound absorbing material (111, 115) to maintain the shape of the sound absorbing material (111, 115).
The method of claim 1,
Sound absorbing plate assembly, characterized in that the aperture ratio in which the plurality of sound through holes 121 are formed in the porous plate 120 is in the range of 0.5 to 10%.
The method of claim 2,
The sound passing hole 121 is formed to gradually increase in diameter from the sound inlet 121a through which the incident sound is introduced to contact the sound absorbing unit 110 from the sound inlet 121b through which the incident sound is discharged. Sound absorbing plate assembly.
The method of claim 3,
The sound passing hole 121 is coupled to the sound passing tube 130 toward the wall or ceiling,
Sound absorbing plate assembly, characterized in that the sound absorption performance of the low frequency band is improved as the length of the sound passage 130 is longer.
In the sound absorbing plate assembly which is installed on the wall or ceiling of the room to absorb noise,
A sound absorbing unit 110 disposed to be spaced apart from the wall or ceiling at a predetermined interval to absorb noise;
A plurality of sound through holes 121 coupled to an inner wall surface of the sound absorbing part 110 facing the wall or ceiling and selectively passing incident sound S1 incident through the sound absorbing part 110 on a plate surface; The porous plate 120 is formed;
A pair of fixing brackets 140 disposed on both sides at predetermined intervals in front of the wall and the ceiling;
It includes a plurality of one-touch detachable brackets 150 are coupled side by side in the vertical direction to the pair of fixed bracket 140,
Both sides of the porous plate 120 are vertically bent to form a coupling leg 123 vertically formed,
The porous plate 120 is a sound absorbing plate assembly, characterized in that the coupling leg 123 is elastically fitted to the front end of the one-touch detachable bracket 150.
The method of claim 5,
The one-touch attachment and detachment bracket 150 is a vertical frame 151 having a predetermined length of the cross-section "c" shape, and elastically open or pinched on the open end of the vertical frame 151 and the coupling leg ( 123 includes a pair of legs for receiving 153 is fitted,
An end portion of the leg receiving clamp 153 is formed in a predetermined area on both sides so as to be dozed by the end of the pair of leg receiving clamp 153 to guide the coupling leg 123 to the leg receiving clamp 153 Sound absorbing plate assembly, characterized in that provided (153a).
In the sound absorbing plate assembly construction method,
Preparing a sound absorbing plate assembly 100 in which the porous plate 120 and the sound absorbing unit 110 are combined;
Fixing a pair of fixing brackets 140 to both sides of the ceiling or wall;
Fixing both ends of the plurality of one-touch attachment and detachment brackets 150 to the pair of fixing brackets 140 to fix positions;
Sound absorbing plate assembly method comprising the step of elastically fitting the coupling leg 123, bent on both sides of the porous plate 120 to the one-touch mounting bracket (150).
The method of claim 7, wherein
The step of elastically fitting the coupling leg 123 to the one-touch detachable bracket 150,
Placing and pressing the coupling leg 123 between the pair of insertion blades 153a of the one-touch attachment and detachment bracket 150;
The pair of insertion blades 153a is opened to guide the coupling leg 123 inwardly, and the coupling leg 123 is elastically disposed between the leg accommodation pins 153 of the one-touch detachable bracket 150. Sound absorbing plate assembly construction method comprising the step of being fitted and the position is fixed.

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